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android / kernel / common.git / f074217c64e88d3fcf7e5be4cf97cee5547612d8 / . / drivers / platform / x86 / thinkpad_acpi.c
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/*
* thinkpad_acpi.c - ThinkPad ACPI Extras
*
*
* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
* Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define TPACPI_VERSION "0.25"
#define TPACPI_SYSFS_VERSION 0x030000
/*
* Changelog:
* 2007-10-20 changelog trimmed down
*
* 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
* drivers/misc.
*
* 2006-11-22 0.13 new maintainer
* changelog now lives in git commit history, and will
* not be updated further in-file.
*
* 2005-03-17 0.11 support for 600e, 770x
* thanks to Jamie Lentin <lentinj@dial.pipex.com>
*
* 2005-01-16 0.9 use MODULE_VERSION
* thanks to Henrik Brix Andersen <brix@gentoo.org>
* fix parameter passing on module loading
* thanks to Rusty Russell <rusty@rustcorp.com.au>
* thanks to Jim Radford <radford@blackbean.org>
* 2004-11-08 0.8 fix init error case, don't return from a macro
* thanks to Chris Wright <chrisw@osdl.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/nvram.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sysfs.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/input.h>
#include <linux/leds.h>
#include <linux/rfkill.h>
#include <linux/dmi.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/acpi.h>
#include <linux/pci_ids.h>
#include <linux/thinkpad_acpi.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <linux/uaccess.h>
#include <acpi/video.h>
/* ThinkPad CMOS commands */
#define TP_CMOS_VOLUME_DOWN 0
#define TP_CMOS_VOLUME_UP 1
#define TP_CMOS_VOLUME_MUTE 2
#define TP_CMOS_BRIGHTNESS_UP 4
#define TP_CMOS_BRIGHTNESS_DOWN 5
#define TP_CMOS_THINKLIGHT_ON 12
#define TP_CMOS_THINKLIGHT_OFF 13
/* NVRAM Addresses */
enum tp_nvram_addr {
TP_NVRAM_ADDR_HK2 = 0x57,
TP_NVRAM_ADDR_THINKLIGHT = 0x58,
TP_NVRAM_ADDR_VIDEO = 0x59,
TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
TP_NVRAM_ADDR_MIXER = 0x60,
};
/* NVRAM bit masks */
enum {
TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
TP_NVRAM_MASK_HKT_ZOOM = 0x20,
TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
TP_NVRAM_MASK_THINKLIGHT = 0x10,
TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
TP_NVRAM_MASK_MUTE = 0x40,
TP_NVRAM_MASK_HKT_VOLUME = 0x80,
TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
TP_NVRAM_POS_LEVEL_VOLUME = 0,
};
/* Misc NVRAM-related */
enum {
TP_NVRAM_LEVEL_VOLUME_MAX = 14,
};
/* ACPI HIDs */
#define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
#define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
#define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268"
#define TPACPI_ACPI_EC_HID "PNP0C09"
/* Input IDs */
#define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
#define TPACPI_HKEY_INPUT_VERSION 0x4101
/* ACPI \WGSV commands */
enum {
TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
};
/* TP_ACPI_WGSV_GET_STATE bits */
enum {
TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
};
/* HKEY events */
enum tpacpi_hkey_event_t {
/* Hotkey-related */
TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */
TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
/* Reasons for waking up from S3/S4 */
TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
/* Auto-sleep after eject request */
TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
/* Misc bay events */
TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
or port replicator */
TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
dock or port replicator */
/* User-interface events */
TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016):
* enter/leave tablet mode
*/
TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
/* Key-related user-interface events */
TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */
/* Thermal events */
TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
/* AC-related events */
TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
/* Further user-interface events */
TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */
TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */
/* Misc */
TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
};
/****************************************************************************
* Main driver
*/
#define TPACPI_NAME "thinkpad"
#define TPACPI_DESC "ThinkPad ACPI Extras"
#define TPACPI_FILE TPACPI_NAME "_acpi"
#define TPACPI_URL "http://ibm-acpi.sf.net/"
#define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
#define TPACPI_PROC_DIR "ibm"
#define TPACPI_ACPI_EVENT_PREFIX "ibm"
#define TPACPI_DRVR_NAME TPACPI_FILE
#define TPACPI_DRVR_SHORTNAME "tpacpi"
#define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
#define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
#define TPACPI_WORKQUEUE_NAME "ktpacpid"
#define TPACPI_MAX_ACPI_ARGS 3
/* Debugging printk groups */
#define TPACPI_DBG_ALL 0xffff
#define TPACPI_DBG_DISCLOSETASK 0x8000
#define TPACPI_DBG_INIT 0x0001
#define TPACPI_DBG_EXIT 0x0002
#define TPACPI_DBG_RFKILL 0x0004
#define TPACPI_DBG_HKEY 0x0008
#define TPACPI_DBG_FAN 0x0010
#define TPACPI_DBG_BRGHT 0x0020
#define TPACPI_DBG_MIXER 0x0040
#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
#define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
/****************************************************************************
* Driver-wide structs and misc. variables
*/
struct ibm_struct;
struct tp_acpi_drv_struct {
const struct acpi_device_id *hid;
struct acpi_driver *driver;
void (*notify) (struct ibm_struct *, u32);
acpi_handle *handle;
u32 type;
struct acpi_device *device;
};
struct ibm_struct {
char *name;
int (*read) (struct seq_file *);
int (*write) (char *);
void (*exit) (void);
void (*resume) (void);
void (*suspend) (void);
void (*shutdown) (void);
struct list_head all_drivers;
struct tp_acpi_drv_struct *acpi;
struct {
u8 acpi_driver_registered:1;
u8 acpi_notify_installed:1;
u8 proc_created:1;
u8 init_called:1;
u8 experimental:1;
} flags;
};
struct ibm_init_struct {
char param[32];
int (*init) (struct ibm_init_struct *);
umode_t base_procfs_mode;
struct ibm_struct *data;
};
static struct {
u32 bluetooth:1;
u32 hotkey:1;
u32 hotkey_mask:1;
u32 hotkey_wlsw:1;
enum {
TP_HOTKEY_TABLET_NONE = 0,
TP_HOTKEY_TABLET_USES_MHKG,
/* X1 Yoga 2016, seen on BIOS N1FET44W */
TP_HOTKEY_TABLET_USES_CMMD,
} hotkey_tablet;
u32 kbdlight:1;
u32 light:1;
u32 light_status:1;
u32 bright_acpimode:1;
u32 bright_unkfw:1;
u32 wan:1;
u32 uwb:1;
u32 fan_ctrl_status_undef:1;
u32 second_fan:1;
u32 beep_needs_two_args:1;
u32 mixer_no_level_control:1;
u32 input_device_registered:1;
u32 platform_drv_registered:1;
u32 platform_drv_attrs_registered:1;
u32 sensors_pdrv_registered:1;
u32 sensors_pdrv_attrs_registered:1;
u32 sensors_pdev_attrs_registered:1;
u32 hotkey_poll_active:1;
u32 has_adaptive_kbd:1;
} tp_features;
static struct {
u16 hotkey_mask_ff:1;
u16 volume_ctrl_forbidden:1;
} tp_warned;
struct thinkpad_id_data {
unsigned int vendor; /* ThinkPad vendor:
* PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
u16 ec_model;
u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
u16 ec_release;
char *model_str; /* ThinkPad T43 */
char *nummodel_str; /* 9384A9C for a 9384-A9C model */
};
static struct thinkpad_id_data thinkpad_id;
static enum {
TPACPI_LIFE_INIT = 0,
TPACPI_LIFE_RUNNING,
TPACPI_LIFE_EXITING,
} tpacpi_lifecycle;
static int experimental;
static u32 dbg_level;
static struct workqueue_struct *tpacpi_wq;
enum led_status_t {
TPACPI_LED_OFF = 0,
TPACPI_LED_ON,
TPACPI_LED_BLINK,
};
/* tpacpi LED class */
struct tpacpi_led_classdev {
struct led_classdev led_classdev;
int led;
};
/* brightness level capabilities */
static unsigned int bright_maxlvl; /* 0 = unknown */
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
static int dbg_wlswemul;
static bool tpacpi_wlsw_emulstate;
static int dbg_bluetoothemul;
static bool tpacpi_bluetooth_emulstate;
static int dbg_wwanemul;
static bool tpacpi_wwan_emulstate;
static int dbg_uwbemul;
static bool tpacpi_uwb_emulstate;
#endif
/*************************************************************************
* Debugging helpers
*/
#define dbg_printk(a_dbg_level, format, arg...) \
do { \
if (dbg_level & (a_dbg_level)) \
printk(KERN_DEBUG pr_fmt("%s: " format), \
__func__, ##arg); \
} while (0)
#ifdef CONFIG_THINKPAD_ACPI_DEBUG
#define vdbg_printk dbg_printk
static const char *str_supported(int is_supported);
#else
static inline const char *str_supported(int is_supported) { return ""; }
#define vdbg_printk(a_dbg_level, format, arg...) \
do { if (0) no_printk(format, ##arg); } while (0)
#endif
static void tpacpi_log_usertask(const char * const what)
{
printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
what, task_tgid_vnr(current));
}
#define tpacpi_disclose_usertask(what, format, arg...) \
do { \
if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
what, task_tgid_vnr(current), ## arg); \
} \
} while (0)
/*
* Quirk handling helpers
*
* ThinkPad IDs and versions seen in the field so far
* are two-characters from the set [0-9A-Z], i.e. base 36.
*
* We use values well outside that range as specials.
*/
#define TPACPI_MATCH_ANY 0xffffU
#define TPACPI_MATCH_UNKNOWN 0U
/* TPID('1', 'Y') == 0x5931 */
#define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
#define TPACPI_Q_IBM(__id1, __id2, __quirk) \
{ .vendor = PCI_VENDOR_ID_IBM, \
.bios = TPID(__id1, __id2), \
.ec = TPACPI_MATCH_ANY, \
.quirks = (__quirk) }
#define TPACPI_Q_LNV(__id1, __id2, __quirk) \
{ .vendor = PCI_VENDOR_ID_LENOVO, \
.bios = TPID(__id1, __id2), \
.ec = TPACPI_MATCH_ANY, \
.quirks = (__quirk) }
#define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
{ .vendor = PCI_VENDOR_ID_LENOVO, \
.bios = TPACPI_MATCH_ANY, \
.ec = TPID(__id1, __id2), \
.quirks = (__quirk) }
struct tpacpi_quirk {
unsigned int vendor;
u16 bios;
u16 ec;
unsigned long quirks;
};
/**
* tpacpi_check_quirks() - search BIOS/EC version on a list
* @qlist: array of &struct tpacpi_quirk
* @qlist_size: number of elements in @qlist
*
* Iterates over a quirks list until one is found that matches the
* ThinkPad's vendor, BIOS and EC model.
*
* Returns 0 if nothing matches, otherwise returns the quirks field of
* the matching &struct tpacpi_quirk entry.
*
* The match criteria is: vendor, ec and bios much match.
*/
static unsigned long __init tpacpi_check_quirks(
const struct tpacpi_quirk *qlist,
unsigned int qlist_size)
{
while (qlist_size) {
if ((qlist->vendor == thinkpad_id.vendor ||
qlist->vendor == TPACPI_MATCH_ANY) &&
(qlist->bios == thinkpad_id.bios_model ||
qlist->bios == TPACPI_MATCH_ANY) &&
(qlist->ec == thinkpad_id.ec_model ||
qlist->ec == TPACPI_MATCH_ANY))
return qlist->quirks;
qlist_size--;
qlist++;
}
return 0;
}
static inline bool __pure __init tpacpi_is_lenovo(void)
{
return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
}
static inline bool __pure __init tpacpi_is_ibm(void)
{
return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
}
/****************************************************************************
****************************************************************************
*
* ACPI Helpers and device model
*
****************************************************************************
****************************************************************************/
/*************************************************************************
* ACPI basic handles
*/
static acpi_handle root_handle;
static acpi_handle ec_handle;
#define TPACPI_HANDLE(object, parent, paths...) \
static acpi_handle object##_handle; \
static const acpi_handle * const object##_parent __initconst = \
&parent##_handle; \
static char *object##_paths[] __initdata = { paths }
TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
/* T4x, X31, X40 */
"\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
"\\CMS", /* R40, R40e */
); /* all others */
TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
"^HKEY", /* R30, R31 */
"HKEY", /* all others */
); /* 570 */
/*************************************************************************
* ACPI helpers
*/
static int acpi_evalf(acpi_handle handle,
int *res, char *method, char *fmt, ...)
{
char *fmt0 = fmt;
struct acpi_object_list params;
union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
struct acpi_buffer result, *resultp;
union acpi_object out_obj;
acpi_status status;
va_list ap;
char res_type;
int success;
int quiet;
if (!*fmt) {
pr_err("acpi_evalf() called with empty format\n");
return 0;
}
if (*fmt == 'q') {
quiet = 1;
fmt++;
} else
quiet = 0;
res_type = *(fmt++);
params.count = 0;
params.pointer = &in_objs[0];
va_start(ap, fmt);
while (*fmt) {
char c = *(fmt++);
switch (c) {
case 'd': /* int */
in_objs[params.count].integer.value = va_arg(ap, int);
in_objs[params.count++].type = ACPI_TYPE_INTEGER;
break;
/* add more types as needed */
default:
pr_err("acpi_evalf() called with invalid format character '%c'\n",
c);
va_end(ap);
return 0;
}
}
va_end(ap);
if (res_type != 'v') {
result.length = sizeof(out_obj);
result.pointer = &out_obj;
resultp = &result;
} else
resultp = NULL;
status = acpi_evaluate_object(handle, method, &params, resultp);
switch (res_type) {
case 'd': /* int */
success = (status == AE_OK &&
out_obj.type == ACPI_TYPE_INTEGER);
if (success && res)
*res = out_obj.integer.value;
break;
case 'v': /* void */
success = status == AE_OK;
break;
/* add more types as needed */
default:
pr_err("acpi_evalf() called with invalid format character '%c'\n",
res_type);
return 0;
}
if (!success && !quiet)
pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
method, fmt0, acpi_format_exception(status));
return success;
}
static int acpi_ec_read(int i, u8 *p)
{
int v;
if (ecrd_handle) {
if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
return 0;
*p = v;
} else {
if (ec_read(i, p) < 0)
return 0;
}
return 1;
}
static int acpi_ec_write(int i, u8 v)
{
if (ecwr_handle) {
if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
return 0;
} else {
if (ec_write(i, v) < 0)
return 0;
}
return 1;
}
static int issue_thinkpad_cmos_command(int cmos_cmd)
{
if (!cmos_handle)
return -ENXIO;
if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
return -EIO;
return 0;
}
/*************************************************************************
* ACPI device model
*/
#define TPACPI_ACPIHANDLE_INIT(object) \
drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
object##_paths, ARRAY_SIZE(object##_paths))
static void __init drv_acpi_handle_init(const char *name,
acpi_handle *handle, const acpi_handle parent,
char **paths, const int num_paths)
{
int i;
acpi_status status;
vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
name);
for (i = 0; i < num_paths; i++) {
status = acpi_get_handle(parent, paths[i], handle);
if (ACPI_SUCCESS(status)) {
dbg_printk(TPACPI_DBG_INIT,
"Found ACPI handle %s for %s\n",
paths[i], name);
return;
}
}
vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
name);
*handle = NULL;
}
static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
u32 level, void *context, void **return_value)
{
struct acpi_device *dev;
if (!strcmp(context, "video")) {
if (acpi_bus_get_device(handle, &dev))
return AE_OK;
if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
return AE_OK;
}
*(acpi_handle *)return_value = handle;
return AE_CTRL_TERMINATE;
}
static void __init tpacpi_acpi_handle_locate(const char *name,
const char *hid,
acpi_handle *handle)
{
acpi_status status;
acpi_handle device_found;
BUG_ON(!name || !handle);
vdbg_printk(TPACPI_DBG_INIT,
"trying to locate ACPI handle for %s, using HID %s\n",
name, hid ? hid : "NULL");
memset(&device_found, 0, sizeof(device_found));
status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
(void *)name, &device_found);
*handle = NULL;
if (ACPI_SUCCESS(status)) {
*handle = device_found;
dbg_printk(TPACPI_DBG_INIT,
"Found ACPI handle for %s\n", name);
} else {
vdbg_printk(TPACPI_DBG_INIT,
"Could not locate an ACPI handle for %s: %s\n",
name, acpi_format_exception(status));
}
}
static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
{
struct ibm_struct *ibm = data;
if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
return;
if (!ibm || !ibm->acpi || !ibm->acpi->notify)
return;
ibm->acpi->notify(ibm, event);
}
static int __init setup_acpi_notify(struct ibm_struct *ibm)
{
acpi_status status;
int rc;
BUG_ON(!ibm->acpi);
if (!*ibm->acpi->handle)
return 0;
vdbg_printk(TPACPI_DBG_INIT,
"setting up ACPI notify for %s\n", ibm->name);
rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
if (rc < 0) {
pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
return -ENODEV;
}
ibm->acpi->device->driver_data = ibm;
sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
TPACPI_ACPI_EVENT_PREFIX,
ibm->name);
status = acpi_install_notify_handler(*ibm->acpi->handle,
ibm->acpi->type, dispatch_acpi_notify, ibm);
if (ACPI_FAILURE(status)) {
if (status == AE_ALREADY_EXISTS) {
pr_notice("another device driver is already handling %s events\n",
ibm->name);
} else {
pr_err("acpi_install_notify_handler(%s) failed: %s\n",
ibm->name, acpi_format_exception(status));
}
return -ENODEV;
}
ibm->flags.acpi_notify_installed = 1;
return 0;
}
static int __init tpacpi_device_add(struct acpi_device *device)
{
return 0;
}
static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
{
int rc;
dbg_printk(TPACPI_DBG_INIT,
"registering %s as an ACPI driver\n", ibm->name);
BUG_ON(!ibm->acpi);
ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
if (!ibm->acpi->driver) {
pr_err("failed to allocate memory for ibm->acpi->driver\n");
return -ENOMEM;
}
sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
ibm->acpi->driver->ids = ibm->acpi->hid;
ibm->acpi->driver->ops.add = &tpacpi_device_add;
rc = acpi_bus_register_driver(ibm->acpi->driver);
if (rc < 0) {
pr_err("acpi_bus_register_driver(%s) failed: %d\n",
ibm->name, rc);
kfree(ibm->acpi->driver);
ibm->acpi->driver = NULL;
} else if (!rc)
ibm->flags.acpi_driver_registered = 1;
return rc;
}
/****************************************************************************
****************************************************************************
*
* Procfs Helpers
*
****************************************************************************
****************************************************************************/
static int dispatch_proc_show(struct seq_file *m, void *v)
{
struct ibm_struct *ibm = m->private;
if (!ibm || !ibm->read)
return -EINVAL;
return ibm->read(m);
}
static int dispatch_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, dispatch_proc_show, PDE_DATA(inode));
}
static ssize_t dispatch_proc_write(struct file *file,
const char __user *userbuf,
size_t count, loff_t *pos)
{
struct ibm_struct *ibm = PDE_DATA(file_inode(file));
char *kernbuf;
int ret;
if (!ibm || !ibm->write)
return -EINVAL;
if (count > PAGE_SIZE - 2)
return -EINVAL;
kernbuf = kmalloc(count + 2, GFP_KERNEL);
if (!kernbuf)
return -ENOMEM;
if (copy_from_user(kernbuf, userbuf, count)) {
kfree(kernbuf);
return -EFAULT;
}
kernbuf[count] = 0;
strcat(kernbuf, ",");
ret = ibm->write(kernbuf);
if (ret == 0)
ret = count;
kfree(kernbuf);
return ret;
}
static const struct file_operations dispatch_proc_fops = {
.owner = THIS_MODULE,
.open = dispatch_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = dispatch_proc_write,
};
static char *next_cmd(char **cmds)
{
char *start = *cmds;
char *end;
while ((end = strchr(start, ',')) && end == start)
start = end + 1;
if (!end)
return NULL;
*end = 0;
*cmds = end + 1;
return start;
}
/****************************************************************************
****************************************************************************
*
* Device model: input, hwmon and platform
*
****************************************************************************
****************************************************************************/
static struct platform_device *tpacpi_pdev;
static struct platform_device *tpacpi_sensors_pdev;
static struct device *tpacpi_hwmon;
static struct input_dev *tpacpi_inputdev;
static struct mutex tpacpi_inputdev_send_mutex;
static LIST_HEAD(tpacpi_all_drivers);
#ifdef CONFIG_PM_SLEEP
static int tpacpi_suspend_handler(struct device *dev)
{
struct ibm_struct *ibm, *itmp;
list_for_each_entry_safe(ibm, itmp,
&tpacpi_all_drivers,
all_drivers) {
if (ibm->suspend)
(ibm->suspend)();
}
return 0;
}
static int tpacpi_resume_handler(struct device *dev)
{
struct ibm_struct *ibm, *itmp;
list_for_each_entry_safe(ibm, itmp,
&tpacpi_all_drivers,
all_drivers) {
if (ibm->resume)
(ibm->resume)();
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(tpacpi_pm,
tpacpi_suspend_handler, tpacpi_resume_handler);
static void tpacpi_shutdown_handler(struct platform_device *pdev)
{
struct ibm_struct *ibm, *itmp;
list_for_each_entry_safe(ibm, itmp,
&tpacpi_all_drivers,
all_drivers) {
if (ibm->shutdown)
(ibm->shutdown)();
}
}
static struct platform_driver tpacpi_pdriver = {
.driver = {
.name = TPACPI_DRVR_NAME,
.pm = &tpacpi_pm,
},
.shutdown = tpacpi_shutdown_handler,
};
static struct platform_driver tpacpi_hwmon_pdriver = {
.driver = {
.name = TPACPI_HWMON_DRVR_NAME,
},
};
/*************************************************************************
* sysfs support helpers
*/
struct attribute_set {
unsigned int members, max_members;
struct attribute_group group;
};
struct attribute_set_obj {
struct attribute_set s;
struct attribute *a;
} __attribute__((packed));
static struct attribute_set *create_attr_set(unsigned int max_members,
const char *name)
{
struct attribute_set_obj *sobj;
if (max_members == 0)
return NULL;
/* Allocates space for implicit NULL at the end too */
sobj = kzalloc(sizeof(struct attribute_set_obj) +
max_members * sizeof(struct attribute *),
GFP_KERNEL);
if (!sobj)
return NULL;
sobj->s.max_members = max_members;
sobj->s.group.attrs = &sobj->a;
sobj->s.group.name = name;
return &sobj->s;
}
#define destroy_attr_set(_set) \
kfree(_set);
/* not multi-threaded safe, use it in a single thread per set */
static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
{
if (!s || !attr)
return -EINVAL;
if (s->members >= s->max_members)
return -ENOMEM;
s->group.attrs[s->members] = attr;
s->members++;
return 0;
}
static int add_many_to_attr_set(struct attribute_set *s,
struct attribute **attr,
unsigned int count)
{
int i, res;
for (i = 0; i < count; i++) {
res = add_to_attr_set(s, attr[i]);
if (res)
return res;
}
return 0;
}
static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
{
sysfs_remove_group(kobj, &s->group);
destroy_attr_set(s);
}
#define register_attr_set_with_sysfs(_attr_set, _kobj) \
sysfs_create_group(_kobj, &_attr_set->group)
static int parse_strtoul(const char *buf,
unsigned long max, unsigned long *value)
{
char *endp;
*value = simple_strtoul(skip_spaces(buf), &endp, 0);
endp = skip_spaces(endp);
if (*endp || *value > max)
return -EINVAL;
return 0;
}
static void tpacpi_disable_brightness_delay(void)
{
if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
pr_notice("ACPI backlight control delay disabled\n");
}
static void printk_deprecated_attribute(const char * const what,
const char * const details)
{
tpacpi_log_usertask("deprecated sysfs attribute");
pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
what, details);
}
/*************************************************************************
* rfkill and radio control support helpers
*/
/*
* ThinkPad-ACPI firmware handling model:
*
* WLSW (master wireless switch) is event-driven, and is common to all
* firmware-controlled radios. It cannot be controlled, just monitored,
* as expected. It overrides all radio state in firmware
*
* The kernel, a masked-off hotkey, and WLSW can change the radio state
* (TODO: verify how WLSW interacts with the returned radio state).
*
* The only time there are shadow radio state changes, is when
* masked-off hotkeys are used.
*/
/*
* Internal driver API for radio state:
*
* int: < 0 = error, otherwise enum tpacpi_rfkill_state
* bool: true means radio blocked (off)
*/
enum tpacpi_rfkill_state {
TPACPI_RFK_RADIO_OFF = 0,
TPACPI_RFK_RADIO_ON
};
/* rfkill switches */
enum tpacpi_rfk_id {
TPACPI_RFK_BLUETOOTH_SW_ID = 0,
TPACPI_RFK_WWAN_SW_ID,
TPACPI_RFK_UWB_SW_ID,
TPACPI_RFK_SW_MAX
};
static const char *tpacpi_rfkill_names[] = {
[TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
[TPACPI_RFK_WWAN_SW_ID] = "wwan",
[TPACPI_RFK_UWB_SW_ID] = "uwb",
[TPACPI_RFK_SW_MAX] = NULL
};
/* ThinkPad-ACPI rfkill subdriver */
struct tpacpi_rfk {
struct rfkill *rfkill;
enum tpacpi_rfk_id id;
const struct tpacpi_rfk_ops *ops;
};
struct tpacpi_rfk_ops {
/* firmware interface */
int (*get_status)(void);
int (*set_status)(const enum tpacpi_rfkill_state);
};
static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
/* Query FW and update rfkill sw state for a given rfkill switch */
static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
{
int status;
if (!tp_rfk)
return -ENODEV;
status = (tp_rfk->ops->get_status)();
if (status < 0)
return status;
rfkill_set_sw_state(tp_rfk->rfkill,
(status == TPACPI_RFK_RADIO_OFF));
return status;
}
/* Query FW and update rfkill sw state for all rfkill switches */
static void tpacpi_rfk_update_swstate_all(void)
{
unsigned int i;
for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
}
/*
* Sync the HW-blocking state of all rfkill switches,
* do notice it causes the rfkill core to schedule uevents
*/
static void tpacpi_rfk_update_hwblock_state(bool blocked)
{
unsigned int i;
struct tpacpi_rfk *tp_rfk;
for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
tp_rfk = tpacpi_rfkill_switches[i];
if (tp_rfk) {
if (rfkill_set_hw_state(tp_rfk->rfkill,
blocked)) {
/* ignore -- we track sw block */
}
}
}
}
/* Call to get the WLSW state from the firmware */
static int hotkey_get_wlsw(void);
/* Call to query WLSW state and update all rfkill switches */
static bool tpacpi_rfk_check_hwblock_state(void)
{
int res = hotkey_get_wlsw();
int hw_blocked;
/* When unknown or unsupported, we have to assume it is unblocked */
if (res < 0)
return false;
hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
tpacpi_rfk_update_hwblock_state(hw_blocked);
return hw_blocked;
}
static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
{
struct tpacpi_rfk *tp_rfk = data;
int res;
dbg_printk(TPACPI_DBG_RFKILL,
"request to change radio state to %s\n",
blocked ? "blocked" : "unblocked");
/* try to set radio state */
res = (tp_rfk->ops->set_status)(blocked ?
TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
/* and update the rfkill core with whatever the FW really did */
tpacpi_rfk_update_swstate(tp_rfk);
return (res < 0) ? res : 0;
}
static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
.set_block = tpacpi_rfk_hook_set_block,
};
static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
const struct tpacpi_rfk_ops *tp_rfkops,
const enum rfkill_type rfktype,
const char *name,
const bool set_default)
{
struct tpacpi_rfk *atp_rfk;
int res;
bool sw_state = false;
bool hw_state;
int sw_status;
BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
if (atp_rfk)
atp_rfk->rfkill = rfkill_alloc(name,
&tpacpi_pdev->dev,
rfktype,
&tpacpi_rfk_rfkill_ops,
atp_rfk);
if (!atp_rfk || !atp_rfk->rfkill) {
pr_err("failed to allocate memory for rfkill class\n");
kfree(atp_rfk);
return -ENOMEM;
}
atp_rfk->id = id;
atp_rfk->ops = tp_rfkops;
sw_status = (tp_rfkops->get_status)();
if (sw_status < 0) {
pr_err("failed to read initial state for %s, error %d\n",
name, sw_status);
} else {
sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
if (set_default) {
/* try to keep the initial state, since we ask the
* firmware to preserve it across S5 in NVRAM */
rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
}
}
hw_state = tpacpi_rfk_check_hwblock_state();
rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
res = rfkill_register(atp_rfk->rfkill);
if (res < 0) {
pr_err("failed to register %s rfkill switch: %d\n", name, res);
rfkill_destroy(atp_rfk->rfkill);
kfree(atp_rfk);
return res;
}
tpacpi_rfkill_switches[id] = atp_rfk;
pr_info("rfkill switch %s: radio is %sblocked\n",
name, (sw_state || hw_state) ? "" : "un");
return 0;
}
static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
{
struct tpacpi_rfk *tp_rfk;
BUG_ON(id >= TPACPI_RFK_SW_MAX);
tp_rfk = tpacpi_rfkill_switches[id];
if (tp_rfk) {
rfkill_unregister(tp_rfk->rfkill);
rfkill_destroy(tp_rfk->rfkill);
tpacpi_rfkill_switches[id] = NULL;
kfree(tp_rfk);
}
}
static void printk_deprecated_rfkill_attribute(const char * const what)
{
printk_deprecated_attribute(what,
"Please switch to generic rfkill before year 2010");
}
/* sysfs <radio> enable ------------------------------------------------ */
static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
struct device_attribute *attr,
char *buf)
{
int status;
printk_deprecated_rfkill_attribute(attr->attr.name);
/* This is in the ABI... */
if (tpacpi_rfk_check_hwblock_state()) {
status = TPACPI_RFK_RADIO_OFF;
} else {
status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
if (status < 0)
return status;
}
return snprintf(buf, PAGE_SIZE, "%d\n",
(status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
}
static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
int res;
printk_deprecated_rfkill_attribute(attr->attr.name);
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
/* This is in the ABI... */
if (tpacpi_rfk_check_hwblock_state() && !!t)
return -EPERM;
res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
return (res < 0) ? res : count;
}
/* procfs -------------------------------------------------------------- */
static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
{
if (id >= TPACPI_RFK_SW_MAX)
seq_printf(m, "status:\t\tnot supported\n");
else {
int status;
/* This is in the ABI... */
if (tpacpi_rfk_check_hwblock_state()) {
status = TPACPI_RFK_RADIO_OFF;
} else {
status = tpacpi_rfk_update_swstate(
tpacpi_rfkill_switches[id]);
if (status < 0)
return status;
}
seq_printf(m, "status:\t\t%s\n",
(status == TPACPI_RFK_RADIO_ON) ?
"enabled" : "disabled");
seq_printf(m, "commands:\tenable, disable\n");
}
return 0;
}
static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
{
char *cmd;
int status = -1;
int res = 0;
if (id >= TPACPI_RFK_SW_MAX)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0)
status = TPACPI_RFK_RADIO_ON;
else if (strlencmp(cmd, "disable") == 0)
status = TPACPI_RFK_RADIO_OFF;
else
return -EINVAL;
}
if (status != -1) {
tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
(status == TPACPI_RFK_RADIO_ON) ?
"enable" : "disable",
tpacpi_rfkill_names[id]);
res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
}
return res;
}
/*************************************************************************
* thinkpad-acpi driver attributes
*/
/* interface_version --------------------------------------------------- */
static ssize_t interface_version_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
}
static DRIVER_ATTR_RO(interface_version);
/* debug_level --------------------------------------------------------- */
static ssize_t debug_level_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
}
static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 0xffff, &t))
return -EINVAL;
dbg_level = t;
return count;
}
static DRIVER_ATTR_RW(debug_level);
/* version ------------------------------------------------------------- */
static ssize_t version_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s v%s\n",
TPACPI_DESC, TPACPI_VERSION);
}
static DRIVER_ATTR_RO(version);
/* --------------------------------------------------------------------- */
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
/* wlsw_emulstate ------------------------------------------------------ */
static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
}
static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
if (tpacpi_wlsw_emulstate != !!t) {
tpacpi_wlsw_emulstate = !!t;
tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
}
return count;
}
static DRIVER_ATTR_RW(wlsw_emulstate);
/* bluetooth_emulstate ------------------------------------------------- */
static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
}
static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
const char *buf, size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
tpacpi_bluetooth_emulstate = !!t;
return count;
}
static DRIVER_ATTR_RW(bluetooth_emulstate);
/* wwan_emulstate ------------------------------------------------- */
static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
}
static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
tpacpi_wwan_emulstate = !!t;
return count;
}
static DRIVER_ATTR_RW(wwan_emulstate);
/* uwb_emulstate ------------------------------------------------- */
static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
}
static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
tpacpi_uwb_emulstate = !!t;
return count;
}
static DRIVER_ATTR_RW(uwb_emulstate);
#endif
/* --------------------------------------------------------------------- */
static struct driver_attribute *tpacpi_driver_attributes[] = {
&driver_attr_debug_level, &driver_attr_version,
&driver_attr_interface_version,
};
static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
{
int i, res;
i = 0;
res = 0;
while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
res = driver_create_file(drv, tpacpi_driver_attributes[i]);
i++;
}
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (!res && dbg_wlswemul)
res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
if (!res && dbg_bluetoothemul)
res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
if (!res && dbg_wwanemul)
res = driver_create_file(drv, &driver_attr_wwan_emulstate);
if (!res && dbg_uwbemul)
res = driver_create_file(drv, &driver_attr_uwb_emulstate);
#endif
return res;
}
static void tpacpi_remove_driver_attributes(struct device_driver *drv)
{
int i;
for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
driver_remove_file(drv, tpacpi_driver_attributes[i]);
#ifdef THINKPAD_ACPI_DEBUGFACILITIES
driver_remove_file(drv, &driver_attr_wlsw_emulstate);
driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
driver_remove_file(drv, &driver_attr_wwan_emulstate);
driver_remove_file(drv, &driver_attr_uwb_emulstate);
#endif
}
/*************************************************************************
* Firmware Data
*/
/*
* Table of recommended minimum BIOS versions
*
* Reasons for listing:
* 1. Stable BIOS, listed because the unknown amount of
* bugs and bad ACPI behaviour on older versions
*
* 2. BIOS or EC fw with known bugs that trigger on Linux
*
* 3. BIOS with known reduced functionality in older versions
*
* We recommend the latest BIOS and EC version.
* We only support the latest BIOS and EC fw version as a rule.
*
* Sources: IBM ThinkPad Public Web Documents (update changelogs),
* Information from users in ThinkWiki
*
* WARNING: we use this table also to detect that the machine is
* a ThinkPad in some cases, so don't remove entries lightly.
*/
#define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
{ .vendor = (__v), \
.bios = TPID(__id1, __id2), \
.ec = TPACPI_MATCH_ANY, \
.quirks = TPACPI_MATCH_ANY << 16 \
| (__bv1) << 8 | (__bv2) }
#define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
__eid, __ev1, __ev2) \
{ .vendor = (__v), \
.bios = TPID(__bid1, __bid2), \
.ec = __eid, \
.quirks = (__ev1) << 24 | (__ev2) << 16 \
| (__bv1) << 8 | (__bv2) }
#define TPV_QI0(__id1, __id2, __bv1, __bv2) \
TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
/* Outdated IBM BIOSes often lack the EC id string */
#define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
__bv1, __bv2, TPID(__id1, __id2), \
__ev1, __ev2), \
TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
__bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
__ev1, __ev2)
/* Outdated IBM BIOSes often lack the EC id string */
#define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
__eid1, __eid2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
__bv1, __bv2, TPID(__eid1, __eid2), \
__ev1, __ev2), \
TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
__bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
__ev1, __ev2)
#define TPV_QL0(__id1, __id2, __bv1, __bv2) \
TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
#define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
__bv1, __bv2, TPID(__id1, __id2), \
__ev1, __ev2)
#define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
__eid1, __eid2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
__bv1, __bv2, TPID(__eid1, __eid2), \
__ev1, __ev2)
static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
/* Numeric models ------------------ */
/* FW MODEL BIOS VERS */
TPV_QI0('I', 'M', '6', '5'), /* 570 */
TPV_QI0('I', 'U', '2', '6'), /* 570E */
TPV_QI0('I', 'B', '5', '4'), /* 600 */
TPV_QI0('I', 'H', '4', '7'), /* 600E */
TPV_QI0('I', 'N', '3', '6'), /* 600E */
TPV_QI0('I', 'T', '5', '5'), /* 600X */
TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
TPV_QI0('I', 'I', '4', '2'), /* 770X */
TPV_QI0('I', 'O', '2', '3'), /* 770Z */
/* A-series ------------------------- */
/* FW MODEL BIOS VERS EC VERS */
TPV_QI0('I', 'W', '5', '9'), /* A20m */
TPV_QI0('I', 'V', '6', '9'), /* A20p */
TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
TPV_QI0('K', 'U', '3', '6'), /* A21e */
TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
TPV_QI0('1', 'B', '1', '7'), /* A22e */
TPV_QI0('1', '3', '2', '0'), /* A22m */
TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
/* G-series ------------------------- */
/* FW MODEL BIOS VERS */
TPV_QI0('1', 'T', 'A', '6'), /* G40 */
TPV_QI0('1', 'X', '5', '7'), /* G41 */
/* R-series, T-series --------------- */
/* FW MODEL BIOS VERS EC VERS */
TPV_QI0('1', 'C', 'F', '0'), /* R30 */
TPV_QI0('1', 'F', 'F', '1'), /* R31 */
TPV_QI0('1', 'M', '9', '7'), /* R32 */
TPV_QI0('1', 'O', '6', '1'), /* R40 */
TPV_QI0('1', 'P', '6', '5'), /* R40 */
TPV_QI0('1', 'S', '7', '0'), /* R40e */
TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
T40/p, T41/p, T42/p (1) */
TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
TPV_QI0('I', 'Y', '6', '1'), /* T20 */
TPV_QI0('K', 'Z', '3', '4'), /* T21 */
TPV_QI0('1', '6', '3', '2'), /* T22 */
TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
/* BIOS FW BIOS VERS EC FW EC VERS */
TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
/* X-series ------------------------- */
/* FW MODEL BIOS VERS EC VERS */
TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
/* (0) - older versions lack DMI EC fw string and functionality */
/* (1) - older versions known to lack functionality */
};
#undef TPV_QL1
#undef TPV_QL0
#undef TPV_QI2
#undef TPV_QI1
#undef TPV_QI0
#undef TPV_Q_X
#undef TPV_Q
static void __init tpacpi_check_outdated_fw(void)
{
unsigned long fwvers;
u16 ec_version, bios_version;
fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
ARRAY_SIZE(tpacpi_bios_version_qtable));
if (!fwvers)
return;
bios_version = fwvers & 0xffffU;
ec_version = (fwvers >> 16) & 0xffffU;
/* note that unknown versions are set to 0x0000 and we use that */
if ((bios_version > thinkpad_id.bios_release) ||
(ec_version > thinkpad_id.ec_release &&
ec_version != TPACPI_MATCH_ANY)) {
/*
* The changelogs would let us track down the exact
* reason, but it is just too much of a pain to track
* it. We only list BIOSes that are either really
* broken, or really stable to begin with, so it is
* best if the user upgrades the firmware anyway.
*/
pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
}
}
static bool __init tpacpi_is_fw_known(void)
{
return tpacpi_check_quirks(tpacpi_bios_version_qtable,
ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
}
/****************************************************************************
****************************************************************************
*
* Subdrivers
*
****************************************************************************
****************************************************************************/
/*************************************************************************
* thinkpad-acpi metadata subdriver
*/
static int thinkpad_acpi_driver_read(struct seq_file *m)
{
seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
return 0;
}
static struct ibm_struct thinkpad_acpi_driver_data = {
.name = "driver",
.read = thinkpad_acpi_driver_read,
};
/*************************************************************************
* Hotkey subdriver
*/
/*
* ThinkPad firmware event model
*
* The ThinkPad firmware has two main event interfaces: normal ACPI
* notifications (which follow the ACPI standard), and a private event
* interface.
*
* The private event interface also issues events for the hotkeys. As
* the driver gained features, the event handling code ended up being
* built around the hotkey subdriver. This will need to be refactored
* to a more formal event API eventually.
*
* Some "hotkeys" are actually supposed to be used as event reports,
* such as "brightness has changed", "volume has changed", depending on
* the ThinkPad model and how the firmware is operating.
*
* Unlike other classes, hotkey-class events have mask/unmask control on
* non-ancient firmware. However, how it behaves changes a lot with the
* firmware model and version.
*/
enum { /* hot key scan codes (derived from ACPI DSDT) */
TP_ACPI_HOTKEYSCAN_FNF1 = 0,
TP_ACPI_HOTKEYSCAN_FNF2,
TP_ACPI_HOTKEYSCAN_FNF3,
TP_ACPI_HOTKEYSCAN_FNF4,
TP_ACPI_HOTKEYSCAN_FNF5,
TP_ACPI_HOTKEYSCAN_FNF6,
TP_ACPI_HOTKEYSCAN_FNF7,
TP_ACPI_HOTKEYSCAN_FNF8,
TP_ACPI_HOTKEYSCAN_FNF9,
TP_ACPI_HOTKEYSCAN_FNF10,
TP_ACPI_HOTKEYSCAN_FNF11,
TP_ACPI_HOTKEYSCAN_FNF12,
TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
TP_ACPI_HOTKEYSCAN_FNINSERT,
TP_ACPI_HOTKEYSCAN_FNDELETE,
TP_ACPI_HOTKEYSCAN_FNHOME,
TP_ACPI_HOTKEYSCAN_FNEND,
TP_ACPI_HOTKEYSCAN_FNPAGEUP,
TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
TP_ACPI_HOTKEYSCAN_FNSPACE,
TP_ACPI_HOTKEYSCAN_VOLUMEUP,
TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
TP_ACPI_HOTKEYSCAN_MUTE,
TP_ACPI_HOTKEYSCAN_THINKPAD,
TP_ACPI_HOTKEYSCAN_UNK1,
TP_ACPI_HOTKEYSCAN_UNK2,
TP_ACPI_HOTKEYSCAN_UNK3,
TP_ACPI_HOTKEYSCAN_UNK4,
TP_ACPI_HOTKEYSCAN_UNK5,
TP_ACPI_HOTKEYSCAN_UNK6,
TP_ACPI_HOTKEYSCAN_UNK7,
TP_ACPI_HOTKEYSCAN_UNK8,
/* Adaptive keyboard keycodes */
TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
TP_ACPI_HOTKEYSCAN_CLOUD,
TP_ACPI_HOTKEYSCAN_UNK9,
TP_ACPI_HOTKEYSCAN_VOICE,
TP_ACPI_HOTKEYSCAN_UNK10,
TP_ACPI_HOTKEYSCAN_GESTURES,
TP_ACPI_HOTKEYSCAN_UNK11,
TP_ACPI_HOTKEYSCAN_UNK12,
TP_ACPI_HOTKEYSCAN_UNK13,
TP_ACPI_HOTKEYSCAN_CONFIG,
TP_ACPI_HOTKEYSCAN_NEW_TAB,
TP_ACPI_HOTKEYSCAN_RELOAD,
TP_ACPI_HOTKEYSCAN_BACK,
TP_ACPI_HOTKEYSCAN_MIC_DOWN,
TP_ACPI_HOTKEYSCAN_MIC_UP,
TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
/* Lenovo extended keymap, starting at 0x1300 */
TP_ACPI_HOTKEYSCAN_EXTENDED_START,
/* first new observed key (star, favorites) is 0x1311 */
TP_ACPI_HOTKEYSCAN_STAR = 69,
TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
TP_ACPI_HOTKEYSCAN_UNK25,
TP_ACPI_HOTKEYSCAN_BLUETOOTH,
TP_ACPI_HOTKEYSCAN_KEYBOARD,
/* Hotkey keymap size */
TPACPI_HOTKEY_MAP_LEN
};
enum { /* Keys/events available through NVRAM polling */
TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
};
enum { /* Positions of some of the keys in hotkey masks */
TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
};
enum { /* NVRAM to ACPI HKEY group map */
TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
TP_ACPI_HKEY_ZOOM_MASK |
TP_ACPI_HKEY_DISPSWTCH_MASK |
TP_ACPI_HKEY_HIBERNATE_MASK,
TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
TP_ACPI_HKEY_BRGHTDWN_MASK,
TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
TP_ACPI_HKEY_VOLDWN_MASK |
TP_ACPI_HKEY_MUTE_MASK,
};
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
struct tp_nvram_state {
u16 thinkpad_toggle:1;
u16 zoom_toggle:1;
u16 display_toggle:1;
u16 thinklight_toggle:1;
u16 hibernate_toggle:1;
u16 displayexp_toggle:1;
u16 display_state:1;
u16 brightness_toggle:1;
u16 volume_toggle:1;
u16 mute:1;
u8 brightness_level;
u8 volume_level;
};
/* kthread for the hotkey poller */
static struct task_struct *tpacpi_hotkey_task;
/*
* Acquire mutex to write poller control variables as an
* atomic block.
*
* Increment hotkey_config_change when changing them if you
* want the kthread to forget old state.
*
* See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
*/
static struct mutex hotkey_thread_data_mutex;
static unsigned int hotkey_config_change;
/*
* hotkey poller control variables
*
* Must be atomic or readers will also need to acquire mutex
*
* HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
* should be used only when the changes need to be taken as
* a block, OR when one needs to force the kthread to forget
* old state.
*/
static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
static unsigned int hotkey_poll_freq = 10; /* Hz */
#define HOTKEY_CONFIG_CRITICAL_START \
do { \
mutex_lock(&hotkey_thread_data_mutex); \
hotkey_config_change++; \
} while (0);
#define HOTKEY_CONFIG_CRITICAL_END \
mutex_unlock(&hotkey_thread_data_mutex);
#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
#define hotkey_source_mask 0U
#define HOTKEY_CONFIG_CRITICAL_START
#define HOTKEY_CONFIG_CRITICAL_END
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static struct mutex hotkey_mutex;
static enum { /* Reasons for waking up */
TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
} hotkey_wakeup_reason;
static int hotkey_autosleep_ack;
static u32 hotkey_orig_mask; /* events the BIOS had enabled */
static u32 hotkey_all_mask; /* all events supported in fw */
static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */
static u32 hotkey_reserved_mask; /* events better left disabled */
static u32 hotkey_driver_mask; /* events needed by the driver */
static u32 hotkey_user_mask; /* events visible to userspace */
static u32 hotkey_acpi_mask; /* events enabled in firmware */
static u16 *hotkey_keycode_map;
static struct attribute_set *hotkey_dev_attributes;
static void tpacpi_driver_event(const unsigned int hkey_event);
static void hotkey_driver_event(const unsigned int scancode);
static void hotkey_poll_setup(const bool may_warn);
/* HKEY.MHKG() return bits */
#define TP_HOTKEY_TABLET_MASK (1 << 3)
/* ThinkPad X1 Yoga (2016) */
#define TP_EC_CMMD_TABLET_MODE 0x6
static int hotkey_get_wlsw(void)
{
int status;
if (!tp_features.hotkey_wlsw)
return -ENODEV;
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wlswemul)
return (tpacpi_wlsw_emulstate) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
#endif
if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
return -EIO;
return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
}
static int hotkey_get_tablet_mode(int *status)
{
int s;
switch (tp_features.hotkey_tablet) {
case TP_HOTKEY_TABLET_USES_MHKG:
if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
return -EIO;
*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
break;
case TP_HOTKEY_TABLET_USES_CMMD:
if (!acpi_evalf(ec_handle, &s, "CMMD", "d"))
return -EIO;
*status = (s == TP_EC_CMMD_TABLET_MODE);
break;
default:
break;
}
return 0;
}
/*
* Reads current event mask from firmware, and updates
* hotkey_acpi_mask accordingly. Also resets any bits
* from hotkey_user_mask that are unavailable to be
* delivered (shadow requirement of the userspace ABI).
*
* Call with hotkey_mutex held
*/
static int hotkey_mask_get(void)
{
if (tp_features.hotkey_mask) {
u32 m = 0;
if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
return -EIO;
hotkey_acpi_mask = m;
} else {
/* no mask support doesn't mean no event support... */
hotkey_acpi_mask = hotkey_all_mask;
}
/* sync userspace-visible mask */
hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
return 0;
}
static void hotkey_mask_warn_incomplete_mask(void)
{
/* log only what the user can fix... */
const u32 wantedmask = hotkey_driver_mask &
~(hotkey_acpi_mask | hotkey_source_mask) &
(hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
if (wantedmask)
pr_notice("required events 0x%08x not enabled!\n", wantedmask);
}
/*
* Set the firmware mask when supported
*
* Also calls hotkey_mask_get to update hotkey_acpi_mask.
*
* NOTE: does not set bits in hotkey_user_mask, but may reset them.
*
* Call with hotkey_mutex held
*/
static int hotkey_mask_set(u32 mask)
{
int i;
int rc = 0;
const u32 fwmask = mask & ~hotkey_source_mask;
if (tp_features.hotkey_mask) {
for (i = 0; i < 32; i++) {
if (!acpi_evalf(hkey_handle,
NULL, "MHKM", "vdd", i + 1,
!!(mask & (1 << i)))) {
rc = -EIO;
break;
}
}
}
/*
* We *must* make an inconditional call to hotkey_mask_get to
* refresh hotkey_acpi_mask and update hotkey_user_mask
*
* Take the opportunity to also log when we cannot _enable_
* a given event.
*/
if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
fwmask, hotkey_acpi_mask);
}
if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
hotkey_mask_warn_incomplete_mask();
return rc;
}
/*
* Sets hotkey_user_mask and tries to set the firmware mask
*
* Call with hotkey_mutex held
*/
static int hotkey_user_mask_set(const u32 mask)
{
int rc;
/* Give people a chance to notice they are doing something that
* is bound to go boom on their users sooner or later */
if (!tp_warned.hotkey_mask_ff &&
(mask == 0xffff || mask == 0xffffff ||
mask == 0xffffffff)) {
tp_warned.hotkey_mask_ff = 1;
pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
mask);
pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
}
/* Try to enable what the user asked for, plus whatever we need.
* this syncs everything but won't enable bits in hotkey_user_mask */
rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
/* Enable the available bits in hotkey_user_mask */
hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
return rc;
}
/*
* Sets the driver hotkey mask.
*
* Can be called even if the hotkey subdriver is inactive
*/
static int tpacpi_hotkey_driver_mask_set(const u32 mask)
{
int rc;
/* Do the right thing if hotkey_init has not been called yet */
if (!tp_features.hotkey) {
hotkey_driver_mask = mask;
return 0;
}
mutex_lock(&hotkey_mutex);
HOTKEY_CONFIG_CRITICAL_START
hotkey_driver_mask = mask;
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_source_mask |= (mask & ~hotkey_all_mask);
#endif
HOTKEY_CONFIG_CRITICAL_END
rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
~hotkey_source_mask);
hotkey_poll_setup(true);
mutex_unlock(&hotkey_mutex);
return rc;
}
static int hotkey_status_get(int *status)
{
if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
return -EIO;
return 0;
}
static int hotkey_status_set(bool enable)
{
if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
return -EIO;
return 0;
}
static void tpacpi_input_send_tabletsw(void)
{
int state;
if (tp_features.hotkey_tablet &&
!hotkey_get_tablet_mode(&state)) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_report_switch(tpacpi_inputdev,
SW_TABLET_MODE, !!state);
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
}
/* Do NOT call without validating scancode first */
static void tpacpi_input_send_key(const unsigned int scancode)
{
const unsigned int keycode = hotkey_keycode_map[scancode];
if (keycode != KEY_RESERVED) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
input_report_key(tpacpi_inputdev, keycode, 1);
input_sync(tpacpi_inputdev);
input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
input_report_key(tpacpi_inputdev, keycode, 0);
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
}
/* Do NOT call without validating scancode first */
static void tpacpi_input_send_key_masked(const unsigned int scancode)
{
hotkey_driver_event(scancode);
if (hotkey_user_mask & (1 << scancode))
tpacpi_input_send_key(scancode);
}
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
/* Do NOT call without validating scancode first */
static void tpacpi_hotkey_send_key(unsigned int scancode)
{
tpacpi_input_send_key_masked(scancode);
}
static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
{
u8 d;
if (m & TP_NVRAM_HKEY_GROUP_HK2) {
d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
}
if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
}
if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
n->displayexp_toggle =
!!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
}
if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
n->brightness_toggle =
!!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
}
if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
>> TP_NVRAM_POS_LEVEL_VOLUME;
n->mute = !!(d & TP_NVRAM_MASK_MUTE);
n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
}
}
#define TPACPI_COMPARE_KEY(__scancode, __member) \
do { \
if ((event_mask & (1 << __scancode)) && \
oldn->__member != newn->__member) \
tpacpi_hotkey_send_key(__scancode); \
} while (0)
#define TPACPI_MAY_SEND_KEY(__scancode) \
do { \
if (event_mask & (1 << __scancode)) \
tpacpi_hotkey_send_key(__scancode); \
} while (0)
static void issue_volchange(const unsigned int oldvol,
const unsigned int newvol,
const u32 event_mask)
{
unsigned int i = oldvol;
while (i > newvol) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
i--;
}
while (i < newvol) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
i++;
}
}
static void issue_brightnesschange(const unsigned int oldbrt,
const unsigned int newbrt,
const u32 event_mask)
{
unsigned int i = oldbrt;
while (i > newbrt) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
i--;
}
while (i < newbrt) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
i++;
}
}
static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
struct tp_nvram_state *newn,
const u32 event_mask)
{
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
/*
* Handle volume
*
* This code is supposed to duplicate the IBM firmware behaviour:
* - Pressing MUTE issues mute hotkey message, even when already mute
* - Pressing Volume up/down issues volume up/down hotkey messages,
* even when already at maximum or minimum volume
* - The act of unmuting issues volume up/down notification,
* depending which key was used to unmute
*
* We are constrained to what the NVRAM can tell us, which is not much
* and certainly not enough if more than one volume hotkey was pressed
* since the last poll cycle.
*
* Just to make our life interesting, some newer Lenovo ThinkPads have
* bugs in the BIOS and may fail to update volume_toggle properly.
*/
if (newn->mute) {
/* muted */
if (!oldn->mute ||
oldn->volume_toggle != newn->volume_toggle ||
oldn->volume_level != newn->volume_level) {
/* recently muted, or repeated mute keypress, or
* multiple presses ending in mute */
issue_volchange(oldn->volume_level, newn->volume_level,
event_mask);
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
}
} else {
/* unmute */
if (oldn->mute) {
/* recently unmuted, issue 'unmute' keypress */
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
}
if (oldn->volume_level != newn->volume_level) {
issue_volchange(oldn->volume_level, newn->volume_level,
event_mask);
} else if (oldn->volume_toggle != newn->volume_toggle) {
/* repeated vol up/down keypress at end of scale ? */
if (newn->volume_level == 0)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
}
}
/* handle brightness */
if (oldn->brightness_level != newn->brightness_level) {
issue_brightnesschange(oldn->brightness_level,
newn->brightness_level, event_mask);
} else if (oldn->brightness_toggle != newn->brightness_toggle) {
/* repeated key presses that didn't change state */
if (newn->brightness_level == 0)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
else if (newn->brightness_level >= bright_maxlvl
&& !tp_features.bright_unkfw)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
}
#undef TPACPI_COMPARE_KEY
#undef TPACPI_MAY_SEND_KEY
}
/*
* Polling driver
*
* We track all events in hotkey_source_mask all the time, since
* most of them are edge-based. We only issue those requested by
* hotkey_user_mask or hotkey_driver_mask, though.
*/
static int hotkey_kthread(void *data)
{
struct tp_nvram_state s[2];
u32 poll_mask, event_mask;
unsigned int si, so;
unsigned long t;
unsigned int change_detector;
unsigned int poll_freq;
bool was_frozen;
if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
goto exit;
set_freezable();
so = 0;
si = 1;
t = 0;
/* Initial state for compares */
mutex_lock(&hotkey_thread_data_mutex);
change_detector = hotkey_config_change;
poll_mask = hotkey_source_mask;
event_mask = hotkey_source_mask &
(hotkey_driver_mask | hotkey_user_mask);
poll_freq = hotkey_poll_freq;
mutex_unlock(&hotkey_thread_data_mutex);
hotkey_read_nvram(&s[so], poll_mask);
while (!kthread_should_stop()) {
if (t == 0) {
if (likely(poll_freq))
t = 1000/poll_freq;
else
t = 100; /* should never happen... */
}
t = msleep_interruptible(t);
if (unlikely(kthread_freezable_should_stop(&was_frozen)))
break;
if (t > 0 && !was_frozen)
continue;
mutex_lock(&hotkey_thread_data_mutex);
if (was_frozen || hotkey_config_change != change_detector) {
/* forget old state on thaw or config change */
si = so;
t = 0;
change_detector = hotkey_config_change;
}
poll_mask = hotkey_source_mask;
event_mask = hotkey_source_mask &
(hotkey_driver_mask | hotkey_user_mask);
poll_freq = hotkey_poll_freq;
mutex_unlock(&hotkey_thread_data_mutex);
if (likely(poll_mask)) {
hotkey_read_nvram(&s[si], poll_mask);
if (likely(si != so)) {
hotkey_compare_and_issue_event(&s[so], &s[si],
event_mask);
}
}
so = si;
si ^= 1;
}
exit:
return 0;
}
/* call with hotkey_mutex held */
static void hotkey_poll_stop_sync(void)
{
if (tpacpi_hotkey_task) {
kthread_stop(tpacpi_hotkey_task);
tpacpi_hotkey_task = NULL;
}
}
/* call with hotkey_mutex held */
static void hotkey_poll_setup(const bool may_warn)
{
const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
if (hotkey_poll_freq > 0 &&
(poll_driver_mask ||
(poll_user_mask && tpacpi_inputdev->users > 0))) {
if (!tpacpi_hotkey_task) {
tpacpi_hotkey_task = kthread_run(hotkey_kthread,
NULL, TPACPI_NVRAM_KTHREAD_NAME);
if (IS_ERR(tpacpi_hotkey_task)) {
tpacpi_hotkey_task = NULL;
pr_err("could not create kernel thread for hotkey polling\n");
}
}
} else {
hotkey_poll_stop_sync();
if (may_warn && (poll_driver_mask || poll_user_mask) &&
hotkey_poll_freq == 0) {
pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
poll_user_mask, poll_driver_mask);
}
}
}
static void hotkey_poll_setup_safe(const bool may_warn)
{
mutex_lock(&hotkey_mutex);
hotkey_poll_setup(may_warn);
mutex_unlock(&hotkey_mutex);
}
/* call with hotkey_mutex held */
static void hotkey_poll_set_freq(unsigned int freq)
{
if (!freq)
hotkey_poll_stop_sync();
hotkey_poll_freq = freq;
}
#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static void hotkey_poll_setup(const bool __unused)
{
}
static void hotkey_poll_setup_safe(const bool __unused)
{
}
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static int hotkey_inputdev_open(struct input_dev *dev)
{
switch (tpacpi_lifecycle) {
case TPACPI_LIFE_INIT:
case TPACPI_LIFE_RUNNING:
hotkey_poll_setup_safe(false);
return 0;
case TPACPI_LIFE_EXITING:
return -EBUSY;
}
/* Should only happen if tpacpi_lifecycle is corrupt */
BUG();
return -EBUSY;
}
static void hotkey_inputdev_close(struct input_dev *dev)
{
/* disable hotkey polling when possible */
if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
!(hotkey_source_mask & hotkey_driver_mask))
hotkey_poll_setup_safe(false);
}
/* sysfs hotkey enable ------------------------------------------------- */
static ssize_t hotkey_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res, status;
printk_deprecated_attribute("hotkey_enable",
"Hotkey reporting is always enabled");
res = hotkey_status_get(&status);
if (res)
return res;
return snprintf(buf, PAGE_SIZE, "%d\n", status);
}
static ssize_t hotkey_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
printk_deprecated_attribute("hotkey_enable",
"Hotkeys can be disabled through hotkey_mask");
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
if (t == 0)
return -EPERM;
return count;
}
static DEVICE_ATTR_RW(hotkey_enable);
/* sysfs hotkey mask --------------------------------------------------- */
static ssize_t hotkey_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
}
static ssize_t hotkey_mask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
int res;
if (parse_strtoul(buf, 0xffffffffUL, &t))
return -EINVAL;
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_user_mask_set(t);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_poll_setup(true);
#endif
mutex_unlock(&hotkey_mutex);
tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
return (res) ? res : count;
}
static DEVICE_ATTR_RW(hotkey_mask);
/* sysfs hotkey bios_enabled ------------------------------------------- */
static ssize_t hotkey_bios_enabled_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "0\n");
}
static DEVICE_ATTR_RO(hotkey_bios_enabled);
/* sysfs hotkey bios_mask ---------------------------------------------- */
static ssize_t hotkey_bios_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
printk_deprecated_attribute("hotkey_bios_mask",
"This attribute is useless.");
return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
}
static DEVICE_ATTR_RO(hotkey_bios_mask);
/* sysfs hotkey all_mask ----------------------------------------------- */
static ssize_t hotkey_all_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n",
hotkey_all_mask | hotkey_source_mask);
}
static DEVICE_ATTR_RO(hotkey_all_mask);
/* sysfs hotkey all_mask ----------------------------------------------- */
static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n",
hotkey_adaptive_all_mask | hotkey_source_mask);
}
static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
/* sysfs hotkey recommended_mask --------------------------------------- */
static ssize_t hotkey_recommended_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n",
(hotkey_all_mask | hotkey_source_mask)
& ~hotkey_reserved_mask);
}
static DEVICE_ATTR_RO(hotkey_recommended_mask);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
/* sysfs hotkey hotkey_source_mask ------------------------------------- */
static ssize_t hotkey_source_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
}
static ssize_t hotkey_source_mask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
u32 r_ev;
int rc;
if (parse_strtoul(buf, 0xffffffffUL, &t) ||
((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
return -EINVAL;
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
HOTKEY_CONFIG_CRITICAL_START
hotkey_source_mask = t;
HOTKEY_CONFIG_CRITICAL_END
rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
~hotkey_source_mask);
hotkey_poll_setup(true);
/* check if events needed by the driver got disabled */
r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
& ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
mutex_unlock(&hotkey_mutex);
if (rc < 0)
pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
if (r_ev)
pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
r_ev);
tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
return (rc < 0) ? rc : count;
}
static DEVICE_ATTR_RW(hotkey_source_mask);
/* sysfs hotkey hotkey_poll_freq --------------------------------------- */
static ssize_t hotkey_poll_freq_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
}
static ssize_t hotkey_poll_freq_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 25, &t))
return -EINVAL;
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
hotkey_poll_set_freq(t);
hotkey_poll_setup(true);
mutex_unlock(&hotkey_mutex);
tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
return count;
}
static DEVICE_ATTR_RW(hotkey_poll_freq);
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
/* sysfs hotkey radio_sw (pollable) ------------------------------------ */
static ssize_t hotkey_radio_sw_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res;
res = hotkey_get_wlsw();
if (res < 0)
return res;
/* Opportunistic update */
tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
return snprintf(buf, PAGE_SIZE, "%d\n",
(res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
}
static DEVICE_ATTR_RO(hotkey_radio_sw);
static void hotkey_radio_sw_notify_change(void)
{
if (tp_features.hotkey_wlsw)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"hotkey_radio_sw");
}
/* sysfs hotkey tablet mode (pollable) --------------------------------- */
static ssize_t hotkey_tablet_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res, s;
res = hotkey_get_tablet_mode(&s);
if (res < 0)
return res;
return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
}
static DEVICE_ATTR_RO(hotkey_tablet_mode);
static void hotkey_tablet_mode_notify_change(void)
{
if (tp_features.hotkey_tablet)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"hotkey_tablet_mode");
}
/* sysfs wakeup reason (pollable) -------------------------------------- */
static ssize_t hotkey_wakeup_reason_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
}
static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
static void hotkey_wakeup_reason_notify_change(void)
{
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"wakeup_reason");
}
/* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
}
static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
hotkey_wakeup_hotunplug_complete_show, NULL);
static void hotkey_wakeup_hotunplug_complete_notify_change(void)
{
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"wakeup_hotunplug_complete");
}
/* sysfs adaptive kbd mode --------------------------------------------- */
static int adaptive_keyboard_get_mode(void);
static int adaptive_keyboard_set_mode(int new_mode);
enum ADAPTIVE_KEY_MODE {
HOME_MODE,
WEB_BROWSER_MODE,
WEB_CONFERENCE_MODE,
FUNCTION_MODE,
LAYFLAT_MODE
};
static ssize_t adaptive_kbd_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int current_mode;
current_mode = adaptive_keyboard_get_mode();
if (current_mode < 0)
return current_mode;
return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
}
static ssize_t adaptive_kbd_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
int res;
if (parse_strtoul(buf, LAYFLAT_MODE, &t))
return -EINVAL;
res = adaptive_keyboard_set_mode(t);
return (res < 0) ? res : count;
}
static DEVICE_ATTR_RW(adaptive_kbd_mode);
static struct attribute *adaptive_kbd_attributes[] = {
&dev_attr_adaptive_kbd_mode.attr,
NULL
};
static const struct attribute_group adaptive_kbd_attr_group = {
.attrs = adaptive_kbd_attributes,
};
/* --------------------------------------------------------------------- */
static struct attribute *hotkey_attributes[] __initdata = {
&dev_attr_hotkey_enable.attr,
&dev_attr_hotkey_bios_enabled.attr,
&dev_attr_hotkey_bios_mask.attr,
&dev_attr_wakeup_reason.attr,
&dev_attr_wakeup_hotunplug_complete.attr,
&dev_attr_hotkey_mask.attr,
&dev_attr_hotkey_all_mask.attr,
&dev_attr_hotkey_adaptive_all_mask.attr,
&dev_attr_hotkey_recommended_mask.attr,
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
&dev_attr_hotkey_source_mask.attr,
&dev_attr_hotkey_poll_freq.attr,
#endif
};
/*
* Sync both the hw and sw blocking state of all switches
*/
static void tpacpi_send_radiosw_update(void)
{
int wlsw;
/*
* We must sync all rfkill controllers *before* issuing any
* rfkill input events, or we will race the rfkill core input
* handler.
*
* tpacpi_inputdev_send_mutex works as a synchronization point
* for the above.
*
* We optimize to avoid numerous calls to hotkey_get_wlsw.
*/
wlsw = hotkey_get_wlsw();
/* Sync hw blocking state first if it is hw-blocked */
if (wlsw == TPACPI_RFK_RADIO_OFF)
tpacpi_rfk_update_hwblock_state(true);
/* Sync sw blocking state */
tpacpi_rfk_update_swstate_all();
/* Sync hw blocking state last if it is hw-unblocked */
if (wlsw == TPACPI_RFK_RADIO_ON)
tpacpi_rfk_update_hwblock_state(false);
/* Issue rfkill input event for WLSW switch */
if (!(wlsw < 0)) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_report_switch(tpacpi_inputdev,
SW_RFKILL_ALL, (wlsw > 0));
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
/*
* this can be unconditional, as we will poll state again
* if userspace uses the notify to read data
*/
hotkey_radio_sw_notify_change();
}
static void hotkey_exit(void)
{
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
mutex_lock(&hotkey_mutex);
hotkey_poll_stop_sync();
mutex_unlock(&hotkey_mutex);
#endif
if (hotkey_dev_attributes)
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
"restoring original HKEY status and mask\n");
/* yes, there is a bitwise or below, we want the
* functions to be called even if one of them fail */
if (((tp_features.hotkey_mask &&
hotkey_mask_set(hotkey_orig_mask)) |
hotkey_status_set(false)) != 0)
pr_err("failed to restore hot key mask to BIOS defaults\n");
}
static void __init hotkey_unmap(const unsigned int scancode)
{
if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
clear_bit(hotkey_keycode_map[scancode],
tpacpi_inputdev->keybit);
hotkey_keycode_map[scancode] = KEY_RESERVED;
}
}
/*
* HKEY quirks:
* TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
*/
#define TPACPI_HK_Q_INIMASK 0x0001
static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
};
typedef u16 tpacpi_keymap_entry_t;
typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
static int hotkey_init_tablet_mode(void)
{
int in_tablet_mode = 0, res;
char *type = NULL;
if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
/* For X41t, X60t, X61t Tablets... */
tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
type = "MHKG";
} else if (acpi_evalf(ec_handle, &res, "CMMD", "qd")) {
/* For X1 Yoga (2016) */
tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_CMMD;
in_tablet_mode = res == TP_EC_CMMD_TABLET_MODE;
type = "CMMD";
}
if (!tp_features.hotkey_tablet)
return 0;
pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
type, in_tablet_mode ? "tablet" : "laptop");
res = add_to_attr_set(hotkey_dev_attributes,
&dev_attr_hotkey_tablet_mode.attr);
if (res)
return -1;
return in_tablet_mode;
}
static int __init hotkey_init(struct ibm_init_struct *iibm)
{
/* Requirements for changing the default keymaps:
*
* 1. Many of the keys are mapped to KEY_RESERVED for very
* good reasons. Do not change them unless you have deep
* knowledge on the IBM and Lenovo ThinkPad firmware for
* the various ThinkPad models. The driver behaves
* differently for KEY_RESERVED: such keys have their
* hot key mask *unset* in mask_recommended, and also
* in the initial hot key mask programmed into the
* firmware at driver load time, which means the firm-
* ware may react very differently if you change them to
* something else;
*
* 2. You must be subscribed to the linux-thinkpad and
* ibm-acpi-devel mailing lists, and you should read the
* list archives since 2007 if you want to change the
* keymaps. This requirement exists so that you will
* know the past history of problems with the thinkpad-
* acpi driver keymaps, and also that you will be
* listening to any bug reports;
*
* 3. Do not send thinkpad-acpi specific patches directly to
* for merging, *ever*. Send them to the linux-acpi
* mailinglist for comments. Merging is to be done only
* through acpi-test and the ACPI maintainer.
*
* If the above is too much to ask, don't change the keymap.
* Ask the thinkpad-acpi maintainer to do it, instead.
*/
enum keymap_index {
TPACPI_KEYMAP_IBM_GENERIC = 0,
TPACPI_KEYMAP_LENOVO_GENERIC,
};
static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
/* Generic keymap for IBM ThinkPads */
[TPACPI_KEYMAP_IBM_GENERIC] = {
/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
KEY_UNKNOWN, /* 0x0D: FN+INSERT */
KEY_UNKNOWN, /* 0x0E: FN+DELETE */
/* brightness: firmware always reacts to them */
KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
KEY_RESERVED, /* 0x10: FN+END (brightness down) */
/* Thinklight: firmware always react to it */
KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
/* Volume: firmware always react to it and reprograms
* the built-in *extra* mixer. Never map it to control
* another mixer by default. */
KEY_RESERVED, /* 0x14: VOLUME UP */
KEY_RESERVED, /* 0x15: VOLUME DOWN */
KEY_RESERVED, /* 0x16: MUTE */
KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
/* (assignments unknown, please report if found) */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
/* No assignments, only used for Adaptive keyboards. */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
/* No assignment, used for newer Lenovo models */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN
},
/* Generic keymap for Lenovo ThinkPads */
[TPACPI_KEYMAP_LENOVO_GENERIC] = {
/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
KEY_UNKNOWN, /* 0x0D: FN+INSERT */
KEY_UNKNOWN, /* 0x0E: FN+DELETE */
/* These should be enabled --only-- when ACPI video
* is disabled (i.e. in "vendor" mode), and are handled
* in a special way by the init code */
KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
/* Volume: z60/z61, T60 (BIOS version?): firmware always
* react to it and reprograms the built-in *extra* mixer.
* Never map it to control another mixer by default.
*
* T60?, T61, R60?, R61: firmware and EC tries to send
* these over the regular keyboard, so these are no-ops,
* but there are still weird bugs re. MUTE, so do not
* change unless you get test reports from all Lenovo
* models. May cause the BIOS to interfere with the
* HDA mixer.
*/
KEY_RESERVED, /* 0x14: VOLUME UP */
KEY_RESERVED, /* 0x15: VOLUME DOWN */
KEY_RESERVED, /* 0x16: MUTE */
KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
/* (assignments unknown, please report if found) */
KEY_UNKNOWN, KEY_UNKNOWN,
/*
* The mic mute button only sends 0x1a. It does not
* automatically mute the mic or change the mute light.
*/
KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
/* (assignments unknown, please report if found) */
KEY_UNKNOWN,
/* Extra keys in use since the X240 / T440 / T540 */
KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
/*
* These are the adaptive keyboard keycodes for Carbon X1 2014.
* The first item in this list is the Mute button which is
* emitted with 0x103 through
* adaptive_keyboard_hotkey_notify_hotkey() when the sound
* symbol is held.
* We'll need to offset those by 0x20.
*/
KEY_RESERVED, /* Mute held, 0x103 */
KEY_BRIGHTNESS_MIN, /* Backlight off */
KEY_RESERVED, /* Clipping tool */
KEY_RESERVED, /* Cloud */
KEY_RESERVED,
KEY_VOICECOMMAND, /* Voice */
KEY_RESERVED,
KEY_RESERVED, /* Gestures */
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
KEY_CONFIG, /* Settings */
KEY_RESERVED, /* New tab */
KEY_REFRESH, /* Reload */
KEY_BACK, /* Back */
KEY_RESERVED, /* Microphone down */
KEY_RESERVED, /* Microphone up */
KEY_RESERVED, /* Microphone cancellation */
KEY_RESERVED, /* Camera mode */
KEY_RESERVED, /* Rotate display, 0x116 */
/*
* These are found in 2017 models (e.g. T470s, X270).
* The lowest known value is 0x311, which according to
* the manual should launch a user defined favorite
* application.
*
* The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
* corresponding to 0x34.
*/
/* (assignments unknown, please report if found) */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_UNKNOWN,
KEY_FAVORITES, /* Favorite app, 0x311 */
KEY_RESERVED, /* Clipping tool */
KEY_RESERVED,
KEY_BLUETOOTH, /* Bluetooth */
KEY_KEYBOARD /* Keyboard, 0x315 */
},
};
static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
/* Generic maps (fallback) */
{
.vendor = PCI_VENDOR_ID_IBM,
.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
.quirks = TPACPI_KEYMAP_IBM_GENERIC,
},
{
.vendor = PCI_VENDOR_ID_LENOVO,
.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
.quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
},
};
#define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
#define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
int res, i;
int status;
int hkeyv;
bool radiosw_state = false;
bool tabletsw_state = false;
unsigned long quirks;
unsigned long keymap_id;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"initializing hotkey subdriver\n");
BUG_ON(!tpacpi_inputdev);
BUG_ON(tpacpi_inputdev->open != NULL ||
tpacpi_inputdev->close != NULL);
TPACPI_ACPIHANDLE_INIT(hkey);
mutex_init(&hotkey_mutex);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
mutex_init(&hotkey_thread_data_mutex);
#endif
/* hotkey not supported on 570 */
tp_features.hotkey = hkey_handle != NULL;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"hotkeys are %s\n",
str_supported(tp_features.hotkey));
if (!tp_features.hotkey)
return 1;
quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
ARRAY_SIZE(tpacpi_hotkey_qtable));
tpacpi_disable_brightness_delay();
/* MUST have enough space for all attributes to be added to
* hotkey_dev_attributes */
hotkey_dev_attributes = create_attr_set(
ARRAY_SIZE(hotkey_attributes) + 2,
NULL);
if (!hotkey_dev_attributes)
return -ENOMEM;
res = add_many_to_attr_set(hotkey_dev_attributes,
hotkey_attributes,
ARRAY_SIZE(hotkey_attributes));
if (res)
goto err_exit;
/* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
for HKEY interface version 0x100 */
if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"firmware HKEY interface version: 0x%x\n",
hkeyv);
switch (hkeyv >> 8) {
case 1:
/*
* MHKV 0x100 in A31, R40, R40e,
* T4x, X31, and later
*/
/* Paranoia check AND init hotkey_all_mask */
if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
"MHKA", "qd")) {
pr_err("missing MHKA handler, please report this to %s\n",
TPACPI_MAIL);
/* Fallback: pre-init for FN+F3,F4,F12 */
hotkey_all_mask = 0x080cU;
} else {
tp_features.hotkey_mask = 1;
}
break;
case 2:
/*
* MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
*/
/* Paranoia check AND init hotkey_all_mask */
if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
"MHKA", "dd", 1)) {
pr_err("missing MHKA handler, please report this to %s\n",
TPACPI_MAIL);
/* Fallback: pre-init for FN+F3,F4,F12 */
hotkey_all_mask = 0x080cU;
} else {
tp_features.hotkey_mask = 1;
}
/*
* Check if we have an adaptive keyboard, like on the
* Lenovo Carbon X1 2014 (2nd Gen).
*/
if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
"MHKA", "dd", 2)) {
if (hotkey_adaptive_all_mask != 0) {
tp_features.has_adaptive_kbd = true;
res = sysfs_create_group(
&tpacpi_pdev->dev.kobj,
&adaptive_kbd_attr_group);
if (res)
goto err_exit;
}
} else {
tp_features.has_adaptive_kbd = false;
hotkey_adaptive_all_mask = 0x0U;
}
break;
default:
pr_err("unknown version of the HKEY interface: 0x%x\n",
hkeyv);
pr_err("please report this to %s\n", TPACPI_MAIL);
break;
}
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"hotkey masks are %s\n",
str_supported(tp_features.hotkey_mask));
/* Init hotkey_all_mask if not initialized yet */
if (!tp_features.hotkey_mask && !hotkey_all_mask &&
(quirks & TPACPI_HK_Q_INIMASK))
hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
/* Init hotkey_acpi_mask and hotkey_orig_mask */
if (tp_features.hotkey_mask) {
/* hotkey_source_mask *must* be zero for
* the first hotkey_mask_get to return hotkey_orig_mask */
res = hotkey_mask_get();
if (res)
goto err_exit;
hotkey_orig_mask = hotkey_acpi_mask;
} else {
hotkey_orig_mask = hotkey_all_mask;
hotkey_acpi_mask = hotkey_all_mask;
}
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wlswemul) {
tp_features.hotkey_wlsw = 1;
radiosw_state = !!tpacpi_wlsw_emulstate;
pr_info("radio switch emulation enabled\n");
} else
#endif
/* Not all thinkpads have a hardware radio switch */
if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
tp_features.hotkey_wlsw = 1;
radiosw_state = !!status;
pr_info("radio switch found; radios are %s\n",
enabled(status, 0));
}
if (tp_features.hotkey_wlsw)
res = add_to_attr_set(hotkey_dev_attributes,
&dev_attr_hotkey_radio_sw.attr);
res = hotkey_init_tablet_mode();
if (res < 0)
goto err_exit;
tabletsw_state = res;
res = register_attr_set_with_sysfs(hotkey_dev_attributes,
&tpacpi_pdev->dev.kobj);
if (res)
goto err_exit;
/* Set up key map */
hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
GFP_KERNEL);
if (!hotkey_keycode_map) {
pr_err("failed to allocate memory for key map\n");
res = -ENOMEM;
goto err_exit;
}
keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
ARRAY_SIZE(tpacpi_keymap_qtable));
BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"using keymap number %lu\n", keymap_id);
memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
TPACPI_HOTKEY_MAP_SIZE);
input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
tpacpi_inputdev->keycode = hotkey_keycode_map;
for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
if (hotkey_keycode_map[i] != KEY_RESERVED) {
input_set_capability(tpacpi_inputdev, EV_KEY,
hotkey_keycode_map[i]);
} else {
if (i < sizeof(hotkey_reserved_mask)*8)
hotkey_reserved_mask |= 1 << i;
}
}
if (tp_features.hotkey_wlsw) {
input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
input_report_switch(tpacpi_inputdev,
SW_RFKILL_ALL, radiosw_state);
}
if (tp_features.hotkey_tablet) {
input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
input_report_switch(tpacpi_inputdev,
SW_TABLET_MODE, tabletsw_state);
}
/* Do not issue duplicate brightness change events to
* userspace. tpacpi_detect_brightness_capabilities() must have
* been called before this point */
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
/* Disable brightness up/down on Lenovo thinkpads when
* ACPI is handling them, otherwise it is plain impossible
* for userspace to do something even remotely sane */
hotkey_reserved_mask |=
(1 << TP_ACPI_HOTKEYSCAN_FNHOME)
| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
}
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
& ~hotkey_all_mask
& ~hotkey_reserved_mask;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"hotkey source mask 0x%08x, polling freq %u\n",
hotkey_source_mask, hotkey_poll_freq);
#endif
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"enabling firmware HKEY event interface...\n");
res = hotkey_status_set(true);
if (res) {
hotkey_exit();
return res;
}
res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
| hotkey_driver_mask)
& ~hotkey_source_mask);
if (res < 0 && res != -ENXIO) {
hotkey_exit();
return res;
}
hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
& ~hotkey_reserved_mask;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
tpacpi_inputdev->open = &hotkey_inputdev_open;
tpacpi_inputdev->close = &hotkey_inputdev_close;
hotkey_poll_setup_safe(true);
return 0;
err_exit:
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
sysfs_remove_group(&tpacpi_pdev->dev.kobj,
&adaptive_kbd_attr_group);
hotkey_dev_attributes = NULL;
return (res < 0) ? res : 1;
}
/* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
* mode, Web conference mode, Function mode and Lay-flat mode.
* We support Home mode and Function mode currently.
*
* Will consider support rest of modes in future.
*
*/
static const int adaptive_keyboard_modes[] = {
HOME_MODE,
/* WEB_BROWSER_MODE = 2,
WEB_CONFERENCE_MODE = 3, */
FUNCTION_MODE
};
#define DFR_CHANGE_ROW 0x101
#define DFR_SHOW_QUICKVIEW_ROW 0x102
#define FIRST_ADAPTIVE_KEY 0x103
/* press Fn key a while second, it will switch to Function Mode. Then
* release Fn key, previous mode be restored.
*/
static bool adaptive_keyboard_mode_is_saved;
static int adaptive_keyboard_prev_mode;
static int adaptive_keyboard_get_mode(void)
{
int mode = 0;
if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
pr_err("Cannot read adaptive keyboard mode\n");
return -EIO;
}
return mode;
}
static int adaptive_keyboard_set_mode(int new_mode)
{
if (new_mode < 0 ||
new_mode > LAYFLAT_MODE)
return -EINVAL;
if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
pr_err("Cannot set adaptive keyboard mode\n");
return -EIO;
}
return 0;
}
static int adaptive_keyboard_get_next_mode(int mode)
{
size_t i;
size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
for (i = 0; i <= max_mode; i++) {
if (adaptive_keyboard_modes[i] == mode)
break;
}
if (i >= max_mode)
i = 0;
else
i++;
return adaptive_keyboard_modes[i];
}
static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
{
int current_mode = 0;
int new_mode = 0;
int keycode;
switch (scancode) {
case DFR_CHANGE_ROW:
if (adaptive_keyboard_mode_is_saved) {
new_mode = adaptive_keyboard_prev_mode;
adaptive_keyboard_mode_is_saved = false;
} else {
current_mode = adaptive_keyboard_get_mode();
if (current_mode < 0)
return false;
new_mode = adaptive_keyboard_get_next_mode(
current_mode);
}
if (adaptive_keyboard_set_mode(new_mode) < 0)
return false;
return true;
case DFR_SHOW_QUICKVIEW_ROW:
current_mode = adaptive_keyboard_get_mode();
if (current_mode < 0)
return false;
adaptive_keyboard_prev_mode = current_mode;
adaptive_keyboard_mode_is_saved = true;
if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
return false;
return true;
default:
if (scancode < FIRST_ADAPTIVE_KEY ||
scancode >= FIRST_ADAPTIVE_KEY +
TP_ACPI_HOTKEYSCAN_EXTENDED_START -
TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
pr_info("Unhandled adaptive keyboard key: 0x%x\n",
scancode);
return false;
}
keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
if (keycode != KEY_RESERVED) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_report_key(tpacpi_inputdev, keycode, 1);
input_sync(tpacpi_inputdev);
input_report_key(tpacpi_inputdev, keycode, 0);
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
return true;
}
}
static bool hotkey_notify_hotkey(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
/* 0x1000-0x1FFF: key presses */
unsigned int scancode = hkey & 0xfff;
*send_acpi_ev = true;
*ignore_acpi_ev = false;
/*
* Original events are in the 0x10XX range, the adaptive keyboard
* found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
* models, additional keys are emitted through 0x13XX.
*/
switch ((hkey >> 8) & 0xf) {
case 0:
if (scancode > 0 &&
scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
/* HKEY event 0x1001 is scancode 0x00 */
scancode--;
if (!(hotkey_source_mask & (1 << scancode))) {
tpacpi_input_send_key_masked(scancode);
*send_acpi_ev = false;
} else {
*ignore_acpi_ev = true;
}
return true;
}
break;
case 1:
return adaptive_keyboard_hotkey_notify_hotkey(scancode);
case 3:
/* Extended keycodes start at 0x300 and our offset into the map
* TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
* will be positive, but might not be in the correct range.
*/
scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
scancode < TPACPI_HOTKEY_MAP_LEN) {
tpacpi_input_send_key(scancode);
return true;
}
break;
}
return false;
}
static bool hotkey_notify_wakeup(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
/* 0x2000-0x2FFF: Wakeup reason */
*send_acpi_ev = true;
*ignore_acpi_ev = false;
switch (hkey) {
case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
*ignore_acpi_ev = true;
break;
case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
*ignore_acpi_ev = true;
break;
case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
/* how to auto-heal: */
/* 2313: woke up from S3, go to S4/S5 */
/* 2413: woke up from S4, go to S5 */
break;
default:
return false;
}
if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
pr_info("woke up due to a hot-unplug request...\n");
hotkey_wakeup_reason_notify_change();
}
return true;
}
static bool hotkey_notify_dockevent(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
/* 0x4000-0x4FFF: dock-related events */
*send_acpi_ev = true;
*ignore_acpi_ev = false;
switch (hkey) {
case TP_HKEY_EV_UNDOCK_ACK:
/* ACPI undock operation completed after wakeup */
hotkey_autosleep_ack = 1;
pr_info("undocked\n");
hotkey_wakeup_hotunplug_complete_notify_change();
return true;
case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
pr_info("docked into hotplug port replicator\n");
return true;
case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
pr_info("undocked from hotplug port replicator\n");
return true;
default:
return false;
}
}
static bool hotkey_notify_usrevent(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
/* 0x5000-0x5FFF: human interface helpers */
*send_acpi_ev = true;
*ignore_acpi_ev = false;
switch (hkey) {
case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
return true;
case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
tpacpi_input_send_tabletsw();
hotkey_tablet_mode_notify_change();
*send_acpi_ev = false;
return true;
case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
case TP_HKEY_EV_LID_OPEN: /* Lid opened */
case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
/* do not propagate these events */
*ignore_acpi_ev = true;
return true;
default:
return false;
}
}
static void thermal_dump_all_sensors(void);
static bool hotkey_notify_6xxx(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
bool known = true;
/* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
*send_acpi_ev = true;
*ignore_acpi_ev = false;
switch (hkey) {
case TP_HKEY_EV_THM_TABLE_CHANGED:
pr_info("EC reports that Thermal Table has changed\n");
/* recommended action: do nothing, we don't have
* Lenovo ATM information */
return true;
case TP_HKEY_EV_ALARM_BAT_HOT:
pr_crit("THERMAL ALARM: battery is too hot!\n");
/* recommended action: warn user through gui */
break;
case TP_HKEY_EV_ALARM_BAT_XHOT:
pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
/* recommended action: immediate sleep/hibernate */
break;
case TP_HKEY_EV_ALARM_SENSOR_HOT:
pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
/* recommended action: warn user through gui, that */
/* some internal component is too hot */
break;
case TP_HKEY_EV_ALARM_SENSOR_XHOT:
pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
/* recommended action: immediate sleep/hibernate */
break;
case TP_HKEY_EV_AC_CHANGED:
/* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
* AC status changed; can be triggered by plugging or
* unplugging AC adapter, docking or undocking. */
/* fallthrough */
case TP_HKEY_EV_KEY_NUMLOCK:
case TP_HKEY_EV_KEY_FN:
case TP_HKEY_EV_KEY_FN_ESC:
/* key press events, we just ignore them as long as the EC
* is still reporting them in the normal keyboard stream */
*send_acpi_ev = false;
*ignore_acpi_ev = true;
return true;
case TP_HKEY_EV_TABLET_CHANGED:
tpacpi_input_send_tabletsw();
hotkey_tablet_mode_notify_change();
*send_acpi_ev = false;
break;
case TP_HKEY_EV_PALM_DETECTED:
case TP_HKEY_EV_PALM_UNDETECTED:
/* palm detected hovering the keyboard, forward to user-space
* via netlink for consumption */
return true;
default:
pr_warn("unknown possible thermal alarm or keyboard event received\n");
known = false;
}
thermal_dump_all_sensors();
return known;
}
static void hotkey_notify(struct ibm_struct *ibm, u32 event)
{
u32 hkey;
bool send_acpi_ev;
bool ignore_acpi_ev;
bool known_ev;
if (event != 0x80) {
pr_err("unknown HKEY notification event %d\n", event);
/* forward it to userspace, maybe it knows how to handle it */
acpi_bus_generate_netlink_event(
ibm->acpi->device->pnp.device_class,
dev_name(&ibm->acpi->device->dev),
event, 0);
return;
}
while (1) {
if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
pr_err("failed to retrieve HKEY event\n");
return;
}
if (hkey == 0) {
/* queue empty */
return;
}
send_acpi_ev = true;
ignore_acpi_ev = false;
switch (hkey >> 12) {
case 1:
/* 0x1000-0x1FFF: key presses */
known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 2:
/* 0x2000-0x2FFF: Wakeup reason */
known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 3:
/* 0x3000-0x3FFF: bay-related wakeups */
switch (hkey) {
case TP_HKEY_EV_BAYEJ_ACK:
hotkey_autosleep_ack = 1;
pr_info("bay ejected\n");
hotkey_wakeup_hotunplug_complete_notify_change();
known_ev = true;
break;
case TP_HKEY_EV_OPTDRV_EJ:
/* FIXME: kick libata if SATA link offline */
known_ev = true;
break;
default:
known_ev = false;
}
break;
case 4:
/* 0x4000-0x4FFF: dock-related events */
known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 5:
/* 0x5000-0x5FFF: human interface helpers */
known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 6:
/* 0x6000-0x6FFF: thermal alarms/notices and
* keyboard events */
known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 7:
/* 0x7000-0x7FFF: misc */
if (tp_features.hotkey_wlsw &&
hkey == TP_HKEY_EV_RFKILL_CHANGED) {
tpacpi_send_radiosw_update();
send_acpi_ev = 0;
known_ev = true;
break;
}
/* fallthrough to default */
default:
known_ev = false;
}
if (!known_ev) {
pr_notice("unhandled HKEY event 0x%04x\n", hkey);
pr_notice("please report the conditions when this event happened to %s\n",
TPACPI_MAIL);
}
/* netlink events */
if (!ignore_acpi_ev && send_acpi_ev) {
acpi_bus_generate_netlink_event(
ibm->acpi->device->pnp.device_class,
dev_name(&ibm->acpi->device->dev),
event, hkey);
}
}
}
static void hotkey_suspend(void)
{
/* Do these on suspend, we get the events on early resume! */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
hotkey_autosleep_ack = 0;
/* save previous mode of adaptive keyboard of X1 Carbon */
if (tp_features.has_adaptive_kbd) {
if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
"GTRW", "dd", 0)) {
pr_err("Cannot read adaptive keyboard mode.\n");
}
}
}
static void hotkey_resume(void)
{
tpacpi_disable_brightness_delay();
if (hotkey_status_set(true) < 0 ||
hotkey_mask_set(hotkey_acpi_mask) < 0)
pr_err("error while attempting to reset the event firmware interface\n");
tpacpi_send_radiosw_update();
hotkey_tablet_mode_notify_change();
hotkey_wakeup_reason_notify_change();
hotkey_wakeup_hotunplug_complete_notify_change();
hotkey_poll_setup_safe(false);
/* restore previous mode of adapive keyboard of X1 Carbon */
if (tp_features.has_adaptive_kbd) {
if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
adaptive_keyboard_prev_mode)) {
pr_err("Cannot set adaptive keyboard mode.\n");
}
}
}
/* procfs -------------------------------------------------------------- */
static int hotkey_read(struct seq_file *m)
{
int res, status;
if (!tp_features.hotkey) {
seq_printf(m, "status:\t\tnot supported\n");
return 0;
}
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_status_get(&status);
if (!res)
res = hotkey_mask_get();
mutex_unlock(&hotkey_mutex);
if (res)
return res;
seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
if (hotkey_all_mask) {
seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
} else {
seq_printf(m, "mask:\t\tnot supported\n");
seq_printf(m, "commands:\tenable, disable, reset\n");
}
return 0;
}
static void hotkey_enabledisable_warn(bool enable)
{
tpacpi_log_usertask("procfs hotkey enable/disable");
if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n")))
pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n");
}
static int hotkey_write(char *buf)
{
int res;
u32 mask;
char *cmd;
if (!tp_features.hotkey)
return -ENODEV;
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
mask = hotkey_user_mask;
res = 0;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
hotkey_enabledisable_warn(1);
} else if (strlencmp(cmd, "disable") == 0) {
hotkey_enabledisable_warn(0);
res = -EPERM;
} else if (strlencmp(cmd, "reset") == 0) {
mask = (hotkey_all_mask | hotkey_source_mask)
& ~hotkey_reserved_mask;
} else if (sscanf(cmd, "0x%x", &mask) == 1) {
/* mask set */
} else if (sscanf(cmd, "%x", &mask) == 1) {
/* mask set */
} else {
res = -EINVAL;
goto errexit;
}
}
if (!res) {
tpacpi_disclose_usertask("procfs hotkey",
"set mask to 0x%08x\n", mask);
res = hotkey_user_mask_set(mask);
}
errexit:
mutex_unlock(&hotkey_mutex);
return res;
}
static const struct acpi_device_id ibm_htk_device_ids[] = {
{TPACPI_ACPI_IBM_HKEY_HID, 0},
{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
{TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
{"", 0},
};
static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
.hid = ibm_htk_device_ids,
.notify = hotkey_notify,
.handle = &hkey_handle,
.type = ACPI_DEVICE_NOTIFY,
};
static struct ibm_struct hotkey_driver_data = {
.name = "hotkey",
.read = hotkey_read,
.write = hotkey_write,
.exit = hotkey_exit,
.resume = hotkey_resume,
.suspend = hotkey_suspend,
.acpi = &ibm_hotkey_acpidriver,
};
/*************************************************************************
* Bluetooth subdriver
*/
enum {
/* ACPI GBDC/SBDC bits */
TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
0 = disable, 1 = enable */
};
enum {
/* ACPI \BLTH commands */
TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
};
#define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
static int bluetooth_get_status(void)
{
int status;
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul)
return (tpacpi_bluetooth_emulstate) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
#endif
if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
return -EIO;
return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
}
static int bluetooth_set_status(enum tpacpi_rfkill_state state)
{
int status;
vdbg_printk(TPACPI_DBG_RFKILL,
"will attempt to %s bluetooth\n",
(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
return 0;
}
#endif
if (state == TPACPI_RFK_RADIO_ON)
status = TP_ACPI_BLUETOOTH_RADIOSSW
| TP_ACPI_BLUETOOTH_RESUMECTRL;
else
status = 0;
if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
return -EIO;
return 0;
}
/* sysfs bluetooth enable ---------------------------------------------- */
static ssize_t bluetooth_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
attr, buf);
}
static ssize_t bluetooth_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
attr, buf, count);
}
static DEVICE_ATTR_RW(bluetooth_enable);
/* --------------------------------------------------------------------- */
static struct attribute *bluetooth_attributes[] = {
&dev_attr_bluetooth_enable.attr,
NULL
};
static const struct attribute_group bluetooth_attr_group = {
.attrs = bluetooth_attributes,
};
static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
.get_status = bluetooth_get_status,
.set_status = bluetooth_set_status,
};
static void bluetooth_shutdown(void)
{
/* Order firmware to save current state to NVRAM */
if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
TP_ACPI_BLTH_SAVE_STATE))
pr_notice("failed to save bluetooth state to NVRAM\n");
else
vdbg_printk(TPACPI_DBG_RFKILL,
"bluetooth state saved to NVRAM\n");
}
static void bluetooth_exit(void)
{
sysfs_remove_group(&tpacpi_pdev->dev.kobj,
&bluetooth_attr_group);
tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
bluetooth_shutdown();
}
static int __init bluetooth_init(struct ibm_init_struct *iibm)
{
int res;
int status = 0;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"initializing bluetooth subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
tp_features.bluetooth = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GBDC", "qd");
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"bluetooth is %s, status 0x%02x\n",
str_supported(tp_features.bluetooth),
status);
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tp_features.bluetooth = 1;
pr_info("bluetooth switch emulation enabled\n");
} else
#endif
if (tp_features.bluetooth &&
!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
/* no bluetooth hardware present in system */
tp_features.bluetooth = 0;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"bluetooth hardware not installed\n");
}
if (!tp_features.bluetooth)
return 1;
res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
&bluetooth_tprfk_ops,
RFKILL_TYPE_BLUETOOTH,
TPACPI_RFK_BLUETOOTH_SW_NAME,
true);
if (res)
return res;
res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
&bluetooth_attr_group);
if (res) {
tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
return res;
}
return 0;
}
/* procfs -------------------------------------------------------------- */
static int bluetooth_read(struct seq_file *m)
{
return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
}
static int bluetooth_write(char *buf)
{
return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
}
static struct ibm_struct bluetooth_driver_data = {
.name = "bluetooth",
.read = bluetooth_read,
.write = bluetooth_write,
.exit = bluetooth_exit,
.shutdown = bluetooth_shutdown,
};
/*************************************************************************
* Wan subdriver
*/
enum {
/* ACPI GWAN/SWAN bits */
TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
0 = disable, 1 = enable */
};
#define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
static int wan_get_status(void)
{
int status;
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul)
return (tpacpi_wwan_emulstate) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
#endif
if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
return -EIO;
return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
}
static int wan_set_status(enum tpacpi_rfkill_state state)
{
int status;
vdbg_printk(TPACPI_DBG_RFKILL,
"will attempt to %s wwan\n",
(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
return 0;
}
#endif
if (state == TPACPI_RFK_RADIO_ON)
status = TP_ACPI_WANCARD_RADIOSSW
| TP_ACPI_WANCARD_RESUMECTRL;
else
status = 0;
if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
return -EIO;
return 0;
}
/* sysfs wan enable ---------------------------------------------------- */
static ssize_t wan_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
attr, buf);
}
static ssize_t wan_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
attr, buf, count);
}
static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
wan_enable_show, wan_enable_store);
/* --------------------------------------------------------------------- */
static struct attribute *wan_attributes[] = {
&dev_attr_wwan_enable.attr,
NULL
};
static const struct attribute_group wan_attr_group = {
.attrs = wan_attributes,
};
static const struct tpacpi_rfk_ops wan_tprfk_ops = {
.get_status = wan_get_status,
.set_status = wan_set_status,
};
static void wan_shutdown(void)
{
/* Order firmware to save current state to NVRAM */
if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
TP_ACPI_WGSV_SAVE_STATE))
pr_notice("failed to save WWAN state to NVRAM\n");
else
vdbg_printk(TPACPI_DBG_RFKILL,
"WWAN state saved to NVRAM\n");
}
static void wan_exit(void)
{
sysfs_remove_group(&tpacpi_pdev->dev.kobj,
&wan_attr_group);
tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
wan_shutdown();
}
static int __init wan_init(struct ibm_init_struct *iibm)
{
int res;
int status = 0;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"initializing wan subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.wan = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GWAN", "qd");
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"wan is %s, status 0x%02x\n",
str_supported(tp_features.wan),
status);
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tp_features.wan = 1;
pr_info("wwan switch emulation enabled\n");
} else
#endif
if (tp_features.wan &&
!(status & TP_ACPI_WANCARD_HWPRESENT)) {
/* no wan hardware present in system */
tp_features.wan = 0;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"wan hardware not installed\n");
}
if (!tp_features.wan)
return 1;
res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
&wan_tprfk_ops,
RFKILL_TYPE_WWAN,
TPACPI_RFK_WWAN_SW_NAME,
true);
if (res)
return res;
res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
&wan_attr_group);
if (res) {
tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
return res;
}
return 0;
}
/* procfs -------------------------------------------------------------- */
static int wan_read(struct seq_file *m)
{
return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
}
static int wan_write(char *buf)
{
return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
}
static struct ibm_struct wan_driver_data = {
.name = "wan",
.read = wan_read,
.write = wan_write,
.exit = wan_exit,
.shutdown = wan_shutdown,
};
/*************************************************************************
* UWB subdriver
*/
enum {
/* ACPI GUWB/SUWB bits */
TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
};
#define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
static int uwb_get_status(void)
{
int status;
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_uwbemul)
return (tpacpi_uwb_emulstate) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
#endif
if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
return -EIO;
return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
}
static int uwb_set_status(enum tpacpi_rfkill_state state)
{
int status;
vdbg_printk(TPACPI_DBG_RFKILL,
"will attempt to %s UWB\n",
(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_uwbemul) {
tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
return 0;
}
#endif
if (state == TPACPI_RFK_RADIO_ON)
status = TP_ACPI_UWB_RADIOSSW;
else
status = 0;
if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
return -EIO;
return 0;
}
/* --------------------------------------------------------------------- */
static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
.get_status = uwb_get_status,
.set_status = uwb_set_status,
};
static void uwb_exit(void)
{
tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
}
static int __init uwb_init(struct ibm_init_struct *iibm)
{
int res;
int status = 0;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"initializing uwb subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.uwb = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GUWB", "qd");
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"uwb is %s, status 0x%02x\n",
str_supported(tp_features.uwb),
status);
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_uwbemul) {
tp_features.uwb = 1;
pr_info("uwb switch emulation enabled\n");
} else
#endif
if (tp_features.uwb &&
!(status & TP_ACPI_UWB_HWPRESENT)) {
/* no uwb hardware present in system */
tp_features.uwb = 0;
dbg_printk(TPACPI_DBG_INIT,
"uwb hardware not installed\n");
}
if (!tp_features.uwb)
return 1;
res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
&uwb_tprfk_ops,
RFKILL_TYPE_UWB,
TPACPI_RFK_UWB_SW_NAME,
false);
return res;
}
static struct ibm_struct uwb_driver_data = {
.name = "uwb",
.exit = uwb_exit,
.flags.experimental = 1,
};
/*************************************************************************
* Video subdriver
*/
#ifdef CONFIG_THINKPAD_ACPI_VIDEO
enum video_access_mode {
TPACPI_VIDEO_NONE = 0,
TPACPI_VIDEO_570, /* 570 */
TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
TPACPI_VIDEO_NEW, /* all others */
};
enum { /* video status flags, based on VIDEO_570 */
TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
};
enum { /* TPACPI_VIDEO_570 constants */
TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
* video_status_flags */
TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
};
static enum video_access_mode video_supported;
static int video_orig_autosw;
static int video_autosw_get(void);
static int video_autosw_set(int enable);
TPACPI_HANDLE(vid, root,
"\\_SB.PCI.AGP.VGA", /* 570 */
"\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
"\\_SB.PCI0.VID0", /* 770e */
"\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
"\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
"\\_SB.PCI0.AGP.VID", /* all others */
); /* R30, R31 */
TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
static int __init video_init(struct ibm_init_struct *iibm)
{
int ivga;
vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
TPACPI_ACPIHANDLE_INIT(vid);
if (tpacpi_is_ibm())
TPACPI_ACPIHANDLE_INIT(vid2);
if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
/* G41, assume IVGA doesn't change */
vid_handle = vid2_handle;
if (!vid_handle)
/* video switching not supported on R30, R31 */
video_supported = TPACPI_VIDEO_NONE;
else if (tpacpi_is_ibm() &&
acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
/* 570 */
video_supported = TPACPI_VIDEO_570;
else if (tpacpi_is_ibm() &&
acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
/* 600e/x, 770e, 770x */
video_supported = TPACPI_VIDEO_770;
else
/* all others */
video_supported = TPACPI_VIDEO_NEW;
vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
str_supported(video_supported != TPACPI_VIDEO_NONE),
video_supported);
return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
}
static void video_exit(void)
{
dbg_printk(TPACPI_DBG_EXIT,
"restoring original video autoswitch mode\n");
if (video_autosw_set(video_orig_autosw))
pr_err("error while trying to restore original video autoswitch mode\n");
}
static int video_outputsw_get(void)
{
int status = 0;
int i;
switch (video_supported) {
case TPACPI_VIDEO_570:
if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
TP_ACPI_VIDEO_570_PHSCMD))
return -EIO;
status = i & TP_ACPI_VIDEO_570_PHSMASK;
break;
case TPACPI_VIDEO_770:
if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
return -EIO;
if (i)
status |= TP_ACPI_VIDEO_S_LCD;
if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
return -EIO;
if (i)
status |= TP_ACPI_VIDEO_S_CRT;
break;
case TPACPI_VIDEO_NEW:
if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
!acpi_evalf(NULL, &i, "\\VCDC", "d"))
return -EIO;
if (i)
status |= TP_ACPI_VIDEO_S_CRT;
if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
!acpi_evalf(NULL, &i, "\\VCDL", "d"))
return -EIO;
if (i)
status |= TP_ACPI_VIDEO_S_LCD;
if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
return -EIO;
if (i)
status |= TP_ACPI_VIDEO_S_DVI;
break;
default:
return -ENOSYS;
}
return status;
}
static int video_outputsw_set(int status)
{
int autosw;
int res = 0;
switch (video_supported) {
case TPACPI_VIDEO_570:
res = acpi_evalf(NULL, NULL,
"\\_SB.PHS2", "vdd",
TP_ACPI_VIDEO_570_PHS2CMD,
status | TP_ACPI_VIDEO_570_PHS2SET);
break;
case TPACPI_VIDEO_770:
autosw = video_autosw_get();
if (autosw < 0)
return autosw;
res = video_autosw_set(1);
if (res)
return res;
res = acpi_evalf(vid_handle, NULL,
"ASWT", "vdd", status * 0x100, 0);
if (!autosw && video_autosw_set(autosw)) {
pr_err("video auto-switch left enabled due to error\n");
return -EIO;
}
break;
case TPACPI_VIDEO_NEW:
res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
break;
default:
return -ENOSYS;
}
return (res) ? 0 : -EIO;
}
static int video_autosw_get(void)
{
int autosw = 0;
switch (video_supported) {
case TPACPI_VIDEO_570:
if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
return -EIO;
break;
case TPACPI_VIDEO_770:
case TPACPI_VIDEO_NEW:
if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
return -EIO;
break;
default:
return -ENOSYS;
}
return autosw & 1;
}
static int video_autosw_set(int enable)
{
if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
return -EIO;
return 0;
}
static int video_outputsw_cycle(void)
{
int autosw = video_autosw_get();
int res;
if (autosw < 0)
return autosw;
switch (video_supported) {
case TPACPI_VIDEO_570:
res = video_autosw_set(1);
if (res)
return res;
res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
break;
case TPACPI_VIDEO_770:
case TPACPI_VIDEO_NEW:
res = video_autosw_set(1);
if (res)
return res;
res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
break;
default:
return -ENOSYS;
}
if (!autosw && video_autosw_set(autosw)) {
pr_err("video auto-switch left enabled due to error\n");
return -EIO;
}
return (res) ? 0 : -EIO;
}
static int video_expand_toggle(void)
{
switch (video_supported) {
case TPACPI_VIDEO_570:
return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
0 : -EIO;
case TPACPI_VIDEO_770:
return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
0 : -EIO;
case TPACPI_VIDEO_NEW:
return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
0 : -EIO;
default:
return -ENOSYS;
}
/* not reached */
}
static int video_read(struct seq_file *m)
{
int status, autosw;
if (video_supported == TPACPI_VIDEO_NONE) {
seq_printf(m, "status:\t\tnot supported\n");
return 0;
}
/* Even reads can crash X.org, so... */
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
status = video_outputsw_get();
if (status < 0)
return status;
autosw = video_autosw_get();
if (autosw < 0)
return autosw;
seq_printf(m, "status:\t\tsupported\n");
seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
if (video_supported == TPACPI_VIDEO_NEW)
seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
if (video_supported == TPACPI_VIDEO_NEW)
seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
seq_printf(m, "commands:\tauto_enable, auto_disable\n");
seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
return 0;
}
static int video_write(char *buf)
{
char *cmd;
int enable, disable, status;
int res;
if (video_supported == TPACPI_VIDEO_NONE)
return -ENODEV;
/* Even reads can crash X.org, let alone writes... */
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
enable = 0;
disable = 0;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "lcd_enable") == 0) {
enable |= TP_ACPI_VIDEO_S_LCD;
} else if (strlencmp(cmd, "lcd_disable") == 0) {
disable |= TP_ACPI_VIDEO_S_LCD;
} else if (strlencmp(cmd, "crt_enable") == 0) {
enable |= TP_ACPI_VIDEO_S_CRT;
} else if (strlencmp(cmd, "crt_disable") == 0) {
disable |= TP_ACPI_VIDEO_S_CRT;
} else if (video_supported == TPACPI_VIDEO_NEW &&
strlencmp(cmd, "dvi_enable") == 0) {
enable |= TP_ACPI_VIDEO_S_DVI;
} else if (video_supported == TPACPI_VIDEO_NEW &&
strlencmp(cmd, "dvi_disable") == 0) {
disable |= TP_ACPI_VIDEO_S_DVI;
} else if (strlencmp(cmd, "auto_enable") == 0) {
res = video_autosw_set(1);
if (res)
return res;
} else if (strlencmp(cmd, "auto_disable") == 0) {
res = video_autosw_set(0);
if (res)
return res;
} else if (strlencmp(cmd, "video_switch") == 0) {
res = video_outputsw_cycle();
if (res)
return res;
} else if (strlencmp(cmd, "expand_toggle") == 0) {
res = video_expand_toggle();
if (res)
return res;
} else
return -EINVAL;
}
if (enable || disable) {
status = video_outputsw_get();
if (status < 0)
return status;
res = video_outputsw_set((status & ~disable) | enable);
if (res)
return res;
}
return 0;
}
static struct ibm_struct video_driver_data = {
.name = "video",
.read = video_read,
.write = video_write,
.exit = video_exit,
};
#endif /* CONFIG_THINKPAD_ACPI_VIDEO */
/*************************************************************************
* Keyboard backlight subdriver
*/
static enum led_brightness kbdlight_brightness;
static DEFINE_MUTEX(kbdlight_mutex);
static int kbdlight_set_level(int level)
{
int ret = 0;
if (!hkey_handle)
return -ENXIO;
mutex_lock(&kbdlight_mutex);
if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
ret = -EIO;
else
kbdlight_brightness = level;
mutex_unlock(&kbdlight_mutex);
return ret;
}
static int kbdlight_get_level(void)
{
int status = 0;
if (!hkey_handle)
return -ENXIO;
if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
return -EIO;
if (status < 0)
return status;
return status & 0x3;
}
static bool kbdlight_is_supported(void)
{
int status = 0;
if (!hkey_handle)
return false;
if (!acpi_has_method(hkey_handle, "MLCG")) {
vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
return false;
}
if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
return false;
}
if (status < 0) {
vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
return false;
}
vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
/*
* Guessed test for keyboard backlight:
*
* Machines with backlight keyboard return:
* b010100000010000000XX - ThinkPad X1 Carbon 3rd
* b110100010010000000XX - ThinkPad x230
* b010100000010000000XX - ThinkPad x240
* b010100000010000000XX - ThinkPad W541
* (XX is current backlight level)
*
* Machines without backlight keyboard return:
* b10100001000000000000 - ThinkPad x230
* b10110001000000000000 - ThinkPad E430
* b00000000000000000000 - ThinkPad E450
*
* Candidate BITs for detection test (XOR):
* b01000000001000000000
* ^
*/
return status & BIT(9);
}
static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
return kbdlight_set_level(brightness);
}
static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
{
int level;
level = kbdlight_get_level();
if (level < 0)
return 0;
return level;
}
static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
.led_classdev = {
.name = "tpacpi::kbd_backlight",
.max_brightness = 2,
.flags = LED_BRIGHT_HW_CHANGED,
.brightness_set_blocking = &kbdlight_sysfs_set,
.brightness_get = &kbdlight_sysfs_get,
}
};
static int __init kbdlight_init(struct ibm_init_struct *iibm)
{
int rc;
vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
if (!kbdlight_is_supported()) {
tp_features.kbdlight = 0;
vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
return 1;
}
kbdlight_brightness = kbdlight_sysfs_get(NULL);
tp_features.kbdlight = 1;
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_led_kbdlight.led_classdev);
if (rc < 0) {
tp_features.kbdlight = 0;
return rc;
}
tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
TP_ACPI_HKEY_KBD_LIGHT_MASK);
return 0;
}
static void kbdlight_exit(void)
{
if (tp_features.kbdlight)
led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
}
static int kbdlight_set_level_and_update(int level)
{
int ret;
struct led_classdev *led_cdev;
ret = kbdlight_set_level(level);
led_cdev = &tpacpi_led_kbdlight.led_classdev;
if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
led_cdev->brightness = level;
return ret;
}
static int kbdlight_read(struct seq_file *m)
{
int level;
if (!tp_features.kbdlight) {
seq_printf(m, "status:\t\tnot supported\n");
} else {
level = kbdlight_get_level();
if (level < 0)
seq_printf(m, "status:\t\terror %d\n", level);
else
seq_printf(m, "status:\t\t%d\n", level);
seq_printf(m, "commands:\t0, 1, 2\n");
}
return 0;
}
static int kbdlight_write(char *buf)
{
char *cmd;
int level = -1;
if (!tp_features.kbdlight)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "0") == 0)
level = 0;
else if (strlencmp(cmd, "1") == 0)
level = 1;
else if (strlencmp(cmd, "2") == 0)
level = 2;
else
return -EINVAL;
}
if (level == -1)
return -EINVAL;
return kbdlight_set_level_and_update(level);
}
static void kbdlight_suspend(void)
{
struct led_classdev *led_cdev;
if (!tp_features.kbdlight)
return;
led_cdev = &tpacpi_led_kbdlight.led_classdev;
led_update_brightness(led_cdev);
led_classdev_suspend(led_cdev);
}
static void kbdlight_resume(void)
{
if (!tp_features.kbdlight)
return;
led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
}
static struct ibm_struct kbdlight_driver_data = {
.name = "kbdlight",
.read = kbdlight_read,
.write = kbdlight_write,
.suspend = kbdlight_suspend,
.resume = kbdlight_resume,
.exit = kbdlight_exit,
};
/*************************************************************************
* Light (thinklight) subdriver
*/
TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
static int light_get_status(void)
{
int status = 0;
if (tp_features.light_status) {
if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
return -EIO;
return (!!status);
}
return -ENXIO;
}
static int light_set_status(int status)
{
int rc;
if (tp_features.light) {
if (cmos_handle) {
rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
(status) ?
TP_CMOS_THINKLIGHT_ON :
TP_CMOS_THINKLIGHT_OFF);
} else {
rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
(status) ? 1 : 0);
}
return (rc) ? 0 : -EIO;
}
return -ENXIO;
}
static int light_sysfs_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
return light_set_status((brightness != LED_OFF) ?
TPACPI_LED_ON : TPACPI_LED_OFF);
}
static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
{
return (light_get_status() == 1) ? LED_FULL : LED_OFF;
}
static struct tpacpi_led_classdev tpacpi_led_thinklight = {
.led_classdev = {
.name = "tpacpi::thinklight",
.brightness_set_blocking = &light_sysfs_set,
.brightness_get = &light_sysfs_get,
}
};
static int __init light_init(struct ibm_init_struct *iibm)
{
int rc;
vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
if (tpacpi_is_ibm()) {
TPACPI_ACPIHANDLE_INIT(ledb);
TPACPI_ACPIHANDLE_INIT(lght);
}
TPACPI_ACPIHANDLE_INIT(cmos);
/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
if (tp_features.light)
/* light status not supported on
570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
tp_features.light_status =
acpi_evalf(ec_handle, NULL, "KBLT", "qv");
vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
str_supported(tp_features.light),
str_supported(tp_features.light_status));
if (!tp_features.light)
return 1;
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_led_thinklight.led_classdev);
if (rc < 0) {
tp_features.light = 0;
tp_features.light_status = 0;
} else {
rc = 0;
}
return rc;
}
static void light_exit(void)
{
led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
}
static int light_read(struct seq_file *m)
{
int status;
if (!tp_features.light) {
seq_printf(m, "status:\t\tnot supported\n");
} else if (!tp_features.light_status) {
seq_printf(m, "status:\t\tunknown\n");
seq_printf(m, "commands:\ton, off\n");
} else {
status = light_get_status();
if (status < 0)
return status;
seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
seq_printf(m, "commands:\ton, off\n");
}
return 0;
}
static int light_write(char *buf)
{
char *cmd;
int newstatus = 0;
if (!tp_features.light)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "on") == 0) {
newstatus = 1;
} else if (strlencmp(cmd, "off") == 0) {
newstatus = 0;
} else
return -EINVAL;
}
return light_set_status(newstatus);
}
static struct ibm_struct light_driver_data = {
.name = "light",
.read = light_read,
.write = light_write,
.exit = light_exit,
};
/*************************************************************************
* CMOS subdriver
*/
/* sysfs cmos_command -------------------------------------------------- */
static ssize_t cmos_command_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long cmos_cmd;
int res;
if (parse_strtoul(buf, 21, &cmos_cmd))
return -EINVAL;
res = issue_thinkpad_cmos_command(cmos_cmd);
return (res) ? res : count;
}
static DEVICE_ATTR_WO(cmos_command);
/* --------------------------------------------------------------------- */
static int __init cmos_init(struct ibm_init_struct *iibm)
{
int res;
vdbg_printk(TPACPI_DBG_INIT,
"initializing cmos commands subdriver\n");
TPACPI_ACPIHANDLE_INIT(cmos);
vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
str_supported(cmos_handle != NULL));
res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
if (res)
return res;
return (cmos_handle) ? 0 : 1;
}
static void cmos_exit(void)
{
device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
}
static int cmos_read(struct seq_file *m)
{
/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
R30, R31, T20-22, X20-21 */
if (!cmos_handle)
seq_printf(m, "status:\t\tnot supported\n");
else {
seq_printf(m, "status:\t\tsupported\n");
seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
}
return 0;
}
static int cmos_write(char *buf)
{
char *cmd;
int cmos_cmd, res;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
cmos_cmd >= 0 && cmos_cmd <= 21) {
/* cmos_cmd set */
} else
return -EINVAL;
res = issue_thinkpad_cmos_command(cmos_cmd);
if (res)
return res;
}
return 0;
}
static struct ibm_struct cmos_driver_data = {
.name = "cmos",
.read = cmos_read,
.write = cmos_write,
.exit = cmos_exit,
};
/*************************************************************************
* LED subdriver
*/
enum led_access_mode {
TPACPI_LED_NONE = 0,
TPACPI_LED_570, /* 570 */
TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
TPACPI_LED_NEW, /* all others */
};
enum { /* For TPACPI_LED_OLD */
TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
};
static enum led_access_mode led_supported;
static acpi_handle led_handle;
#define TPACPI_LED_NUMLEDS 16
static struct tpacpi_led_classdev *tpacpi_leds;
static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
/* there's a limit of 19 chars + NULL before 2.6.26 */
"tpacpi::power",
"tpacpi:orange:batt",
"tpacpi:green:batt",
"tpacpi::dock_active",
"tpacpi::bay_active",
"tpacpi::dock_batt",
"tpacpi::unknown_led",
"tpacpi::standby",
"tpacpi::dock_status1",
"tpacpi::dock_status2",
"tpacpi::unknown_led2",
"tpacpi::unknown_led3",
"tpacpi::thinkvantage",
};
#define TPACPI_SAFE_LEDS 0x1081U
static inline bool tpacpi_is_led_restricted(const unsigned int led)
{
#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
return false;
#else
return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
#endif
}
static int led_get_status(const unsigned int led)
{
int status;
enum led_status_t led_s;
switch (led_supported) {
case TPACPI_LED_570:
if (!acpi_evalf(ec_handle,
&status, "GLED", "dd", 1 << led))
return -EIO;
led_s = (status == 0) ?
TPACPI_LED_OFF :
((status == 1) ?
TPACPI_LED_ON :
TPACPI_LED_BLINK);
tpacpi_led_state_cache[led] = led_s;
return led_s;
default:
return -ENXIO;
}
/* not reached */
}
static int led_set_status(const unsigned int led,
const enum led_status_t ledstatus)
{
/* off, on, blink. Index is led_status_t */
static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
int rc = 0;
switch (led_supported) {
case TPACPI_LED_570:
/* 570 */
if (unlikely(led > 7))
return -EINVAL;
if (unlikely(tpacpi_is_led_restricted(led)))
return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
(1 << led), led_sled_arg1[ledstatus]))
rc = -EIO;
break;
case TPACPI_LED_OLD:
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
if (unlikely(led > 7))
return -EINVAL;
if (unlikely(tpacpi_is_led_restricted(led)))
return -EPERM;
rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
if (rc >= 0)
rc = ec_write(TPACPI_LED_EC_HLBL,
(ledstatus == TPACPI_LED_BLINK) << led);
if (rc >= 0)
rc = ec_write(TPACPI_LED_EC_HLCL,
(ledstatus != TPACPI_LED_OFF) << led);
break;
case TPACPI_LED_NEW:
/* all others */
if (unlikely(led >= TPACPI_LED_NUMLEDS))
return -EINVAL;
if (unlikely(tpacpi_is_led_restricted(led)))
return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ledstatus]))
rc = -EIO;
break;
default:
rc = -ENXIO;
}
if (!rc)
tpacpi_led_state_cache[led] = ledstatus;
return rc;
}
static int led_sysfs_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
enum led_status_t new_state;
if (brightness == LED_OFF)
new_state = TPACPI_LED_OFF;
else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
new_state = TPACPI_LED_ON;
else
new_state = TPACPI_LED_BLINK;
return led_set_status(data->led, new_state);
}
static int led_sysfs_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
/* Can we choose the flash rate? */
if (*delay_on == 0 && *delay_off == 0) {
/* yes. set them to the hardware blink rate (1 Hz) */
*delay_on = 500; /* ms */
*delay_off = 500; /* ms */
} else if ((*delay_on != 500) || (*delay_off != 500))
return -EINVAL;
return led_set_status(data->led, TPACPI_LED_BLINK);
}
static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
{
int rc;
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
rc = led_get_status(data->led);
if (rc == TPACPI_LED_OFF || rc < 0)
rc = LED_OFF; /* no error handling in led class :( */
else
rc = LED_FULL;
return rc;
}
static void led_exit(void)
{
unsigned int i;
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
if (tpacpi_leds[i].led_classdev.name)
led_classdev_unregister(&tpacpi_leds[i].led_classdev);
}
kfree(tpacpi_leds);
}
static int __init tpacpi_init_led(unsigned int led)
{
int rc;
tpacpi_leds[led].led = led;
/* LEDs with no name don't get registered */
if (!tpacpi_led_names[led])
return 0;
tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
if (led_supported == TPACPI_LED_570)
tpacpi_leds[led].led_classdev.brightness_get =
&led_sysfs_get;
tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_leds[led].led_classdev);
if (rc < 0)
tpacpi_leds[led].led_classdev.name = NULL;
return rc;
}
static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
/* (1) - may have excess leds enabled on MSB */
/* Defaults (order matters, keep last, don't reorder!) */
{ /* Lenovo */
.vendor = PCI_VENDOR_ID_LENOVO,
.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
.quirks = 0x1fffU,
},
{ /* IBM ThinkPads with no EC version string */
.vendor = PCI_VENDOR_ID_IBM,
.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
.quirks = 0x00ffU,
},
{ /* IBM ThinkPads with EC version string */
.vendor = PCI_VENDOR_ID_IBM,
.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
.quirks = 0x00bfU,
},
};
#undef TPACPI_LEDQ_IBM
#undef TPACPI_LEDQ_LNV
static enum led_access_mode __init led_init_detect_mode(void)
{
acpi_status status;
if (tpacpi_is_ibm()) {
/* 570 */
status = acpi_get_handle(ec_handle, "SLED", &led_handle);
if (ACPI_SUCCESS(status))
return TPACPI_LED_570;
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
if (ACPI_SUCCESS(status))
return TPACPI_LED_OLD;
}
/* most others */
status = acpi_get_handle(ec_handle, "LED", &led_handle);
if (ACPI_SUCCESS(status))
return TPACPI_LED_NEW;
/* R30, R31, and unknown firmwares */
led_handle = NULL;
return TPACPI_LED_NONE;
}
static int __init led_init(struct ibm_init_struct *iibm)
{
unsigned int i;
int rc;
unsigned long useful_leds;
vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
led_supported = led_init_detect_mode();
if (led_supported != TPACPI_LED_NONE) {
useful_leds = tpacpi_check_quirks(led_useful_qtable,
ARRAY_SIZE(led_useful_qtable));
if (!useful_leds) {
led_handle = NULL;
led_supported = TPACPI_LED_NONE;
}
}
vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
str_supported(led_supported), led_supported);
if (led_supported == TPACPI_LED_NONE)
return 1;
tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
GFP_KERNEL);
if (!tpacpi_leds) {
pr_err("Out of memory for LED data\n");
return -ENOMEM;
}
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
tpacpi_leds[i].led = -1;
if (!tpacpi_is_led_restricted(i) &&
test_bit(i, &useful_leds)) {
rc = tpacpi_init_led(i);
if (rc < 0) {
led_exit();
return rc;
}
}
}
#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
#endif
return 0;
}
#define str_led_status(s) \
((s) == TPACPI_LED_OFF ? "off" : \
((s) == TPACPI_LED_ON ? "on" : "blinking"))
static int led_read(struct seq_file *m)
{
if (!led_supported) {
seq_printf(m, "status:\t\tnot supported\n");
return 0;
}
seq_printf(m, "status:\t\tsupported\n");
if (led_supported == TPACPI_LED_570) {
/* 570 */
int i, status;
for (i = 0; i < 8; i++) {
status = led_get_status(i);
if (status < 0)
return -EIO;
seq_printf(m, "%d:\t\t%s\n",
i, str_led_status(status));
}
}
seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
return 0;
}
static int led_write(char *buf)
{
char *cmd;
int led, rc;
enum led_status_t s;
if (!led_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%d", &led) != 1)
return -EINVAL;
if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
tpacpi_leds[led].led < 0)
return -ENODEV;
if (strstr(cmd, "off")) {
s = TPACPI_LED_OFF;
} else if (strstr(cmd, "on")) {
s = TPACPI_LED_ON;
} else if (strstr(cmd, "blink")) {
s = TPACPI_LED_BLINK;
} else {
return -EINVAL;
}
rc = led_set_status(led, s);
if (rc < 0)
return rc;
}
return 0;
}
static struct ibm_struct led_driver_data = {
.name = "led",
.read = led_read,
.write = led_write,
.exit = led_exit,
};
/*************************************************************************
* Beep subdriver
*/
TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
#define TPACPI_BEEP_Q1 0x0001
static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
};
static int __init beep_init(struct ibm_init_struct *iibm)
{
unsigned long quirks;
vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
TPACPI_ACPIHANDLE_INIT(beep);
vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
str_supported(beep_handle != NULL));
quirks = tpacpi_check_quirks(beep_quirk_table,
ARRAY_SIZE(beep_quirk_table));
tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
return (beep_handle) ? 0 : 1;
}
static int beep_read(struct seq_file *m)
{
if (!beep_handle)
seq_printf(m, "status:\t\tnot supported\n");
else {
seq_printf(m, "status:\t\tsupported\n");
seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
}
return 0;
}
static int beep_write(char *buf)
{
char *cmd;
int beep_cmd;
if (!beep_handle)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
beep_cmd >= 0 && beep_cmd <= 17) {
/* beep_cmd set */
} else
return -EINVAL;
if (tp_features.beep_needs_two_args) {
if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
beep_cmd, 0))
return -EIO;
} else {
if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
beep_cmd))
return -EIO;
}
}
return 0;
}
static struct ibm_struct beep_driver_data = {
.name = "beep",
.read = beep_read,
.write = beep_write,
};
/*************************************************************************
* Thermal subdriver
*/
enum thermal_access_mode {
TPACPI_THERMAL_NONE = 0, /* No thermal support */
TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
};
enum { /* TPACPI_THERMAL_TPEC_* */
TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
};
#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
struct ibm_thermal_sensors_struct {
s32 temp[TPACPI_MAX_THERMAL_SENSORS];
};
static enum thermal_access_mode thermal_read_mode;
/* idx is zero-based */
static int thermal_get_sensor(int idx, s32 *value)
{
int t;
s8 tmp;
char tmpi[5];
t = TP_EC_THERMAL_TMP0;
switch (thermal_read_mode) {
#if TPACPI_MAX_THERMAL_SENSORS >= 16
case TPACPI_THERMAL_TPEC_16:
if (idx >= 8 && idx <= 15) {
t = TP_EC_THERMAL_TMP8;
idx -= 8;
}
/* fallthrough */
#endif
case TPACPI_THERMAL_TPEC_8:
if (idx <= 7) {
if (!acpi_ec_read(t + idx, &tmp))
return -EIO;
*value = tmp * 1000;
return 0;
}
break;
case TPACPI_THERMAL_ACPI_UPDT:
if (idx <= 7) {
snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
return -EIO;
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
*value = (t - 2732) * 100;
return 0;
}
break;
case TPACPI_THERMAL_ACPI_TMP07:
if (idx <= 7) {
snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
if (t > 127 || t < -127)
t = TP_EC_THERMAL_TMP_NA;
*value = t * 1000;
return 0;
}
break;
case TPACPI_THERMAL_NONE:
default:
return -ENOSYS;
}
return -EINVAL;
}
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
{
int res, i;
int n;
n = 8;
i = 0;
if (!s)
return -EINVAL;
if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
n = 16;
for (i = 0 ; i < n; i++) {
res = thermal_get_sensor(i, &s->temp[i]);
if (res)
return res;
}
return n;
}
static void thermal_dump_all_sensors(void)
{
int n, i;
struct ibm_thermal_sensors_struct t;
n = thermal_get_sensors(&t);
if (n <= 0)
return;
pr_notice("temperatures (Celsius):");
for (i = 0; i < n; i++) {
if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
pr_cont(" %d", (int)(t.temp[i] / 1000));
else
pr_cont(" N/A");
}
pr_cont("\n");
}
/* sysfs temp##_input -------------------------------------------------- */
static ssize_t thermal_temp_input_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr =
to_sensor_dev_attr(attr);
int idx = sensor_attr->index;
s32 value;
int res;
res = thermal_get_sensor(idx, &value);
if (res)
return res;
if (value == TPACPI_THERMAL_SENSOR_NA)
return -ENXIO;
return snprintf(buf, PAGE_SIZE, "%d\n", value);
}
#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
thermal_temp_input_show, NULL, _idxB)
static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
THERMAL_SENSOR_ATTR_TEMP(1, 0),
THERMAL_SENSOR_ATTR_TEMP(2, 1),
THERMAL_SENSOR_ATTR_TEMP(3, 2),
THERMAL_SENSOR_ATTR_TEMP(4, 3),
THERMAL_SENSOR_ATTR_TEMP(5, 4),
THERMAL_SENSOR_ATTR_TEMP(6, 5),
THERMAL_SENSOR_ATTR_TEMP(7, 6),
THERMAL_SENSOR_ATTR_TEMP(8, 7),
THERMAL_SENSOR_ATTR_TEMP(9, 8),
THERMAL_SENSOR_ATTR_TEMP(10, 9),
THERMAL_SENSOR_ATTR_TEMP(11, 10),
THERMAL_SENSOR_ATTR_TEMP(12, 11),
THERMAL_SENSOR_ATTR_TEMP(13, 12),
THERMAL_SENSOR_ATTR_TEMP(14, 13),
THERMAL_SENSOR_ATTR_TEMP(15, 14),
THERMAL_SENSOR_ATTR_TEMP(16, 15),
};
#define THERMAL_ATTRS(X) \
&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
static struct attribute *thermal_temp_input_attr[] = {
THERMAL_ATTRS(8),
THERMAL_ATTRS(9),
THERMAL_ATTRS(10),
THERMAL_ATTRS(11),
THERMAL_ATTRS(12),
THERMAL_ATTRS(13),
THERMAL_ATTRS(14),
THERMAL_ATTRS(15),
THERMAL_ATTRS(0),
THERMAL_ATTRS(1),
THERMAL_ATTRS(2),
THERMAL_ATTRS(3),
THERMAL_ATTRS(4),
THERMAL_ATTRS(5),
THERMAL_ATTRS(6),
THERMAL_ATTRS(7),
NULL
};
static const struct attribute_group thermal_temp_input16_group = {
.attrs = thermal_temp_input_attr
};
static const struct attribute_group thermal_temp_input8_group = {
.attrs = &thermal_temp_input_attr[8]
};
#undef THERMAL_SENSOR_ATTR_TEMP
#undef THERMAL_ATTRS
/* --------------------------------------------------------------------- */
static int __init thermal_init(struct ibm_init_struct *iibm)
{
u8 t, ta1, ta2;
int i;
int acpi_tmp7;
int res;
vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
if (thinkpad_id.ec_model) {
/*
* Direct EC access mode: sensors at registers
* 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
* non-implemented, thermal sensors return 0x80 when
* not available
*/
ta1 = ta2 = 0;
for (i = 0; i < 8; i++) {
if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
ta1 |= t;
} else {
ta1 = 0;
break;
}
if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
ta2 |= t;
} else {
ta1 = 0;
break;
}
}
if (ta1 == 0) {
/* This is sheer paranoia, but we handle it anyway */
if (acpi_tmp7) {
pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
} else {
pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
thermal_read_mode = TPACPI_THERMAL_NONE;
}
} else {
thermal_read_mode =
(ta2 != 0) ?
TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
}
} else if (acpi_tmp7) {
if (tpacpi_is_ibm() &&
acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
/* 600e/x, 770e, 770x */
thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
} else {
/* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
}
} else {
/* temperatures not supported on 570, G4x, R30, R31, R32 */
thermal_read_mode = TPACPI_THERMAL_NONE;
}
vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
thermal_read_mode);
switch (thermal_read_mode) {
case TPACPI_THERMAL_TPEC_16:
res = sysfs_create_group(&tpacpi_hwmon->kobj,
&thermal_temp_input16_group);
if (res)
return res;
break;
case TPACPI_THERMAL_TPEC_8:
case TPACPI_THERMAL_ACPI_TMP07:
case TPACPI_THERMAL_ACPI_UPDT:
res = sysfs_create_group(&tpacpi_hwmon->kobj,
&thermal_temp_input8_group);
if (res)
return res;
break;
case TPACPI_THERMAL_NONE:
default:
return 1;
}
return 0;
}
static void thermal_exit(void)
{
switch (thermal_read_mode) {
case TPACPI_THERMAL_TPEC_16:
sysfs_remove_group(&tpacpi_hwmon->kobj,
&thermal_temp_input16_group);
break;
case TPACPI_THERMAL_TPEC_8:
case TPACPI_THERMAL_ACPI_TMP07:
case TPACPI_THERMAL_ACPI_UPDT:
sysfs_remove_group(&tpacpi_hwmon->kobj,
&thermal_temp_input8_group);
break;
case TPACPI_THERMAL_NONE:
default:
break;
}
}
static int thermal_read(struct seq_file *m)
{
int n, i;
struct ibm_thermal_sensors_struct t;
n = thermal_get_sensors(&t);
if (unlikely(n < 0))
return n;
seq_printf(m, "temperatures:\t");
if (n > 0) {
for (i = 0; i < (n - 1); i++)
seq_printf(m, "%d ", t.temp[i] / 1000);
seq_printf(m, "%d\n", t.temp[i] / 1000);
} else
seq_printf(m, "not supported\n");
return 0;
}
static struct ibm_struct thermal_driver_data = {
.name = "thermal",
.read = thermal_read,
.exit = thermal_exit,
};
/*************************************************************************
* Backlight/brightness subdriver
*/
#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
/*
* ThinkPads can read brightness from two places: EC HBRV (0x31), or
* CMOS NVRAM byte 0x5E, bits 0-3.
*
* EC HBRV (0x31) has the following layout
* Bit 7: unknown function
* Bit 6: unknown function
* Bit 5: Z: honour scale changes, NZ: ignore scale changes
* Bit 4: must be set to zero to avoid problems
* Bit 3-0: backlight brightness level
*
* brightness_get_raw returns status data in the HBRV layout
*
* WARNING: The X61 has been verified to use HBRV for something else, so
* this should be used _only_ on IBM ThinkPads, and maybe with some careful
* testing on the very early *60 Lenovo models...
*/
enum {
TP_EC_BACKLIGHT = 0x31,
/* TP_EC_BACKLIGHT bitmasks */
TP_EC_BACKLIGHT_LVLMSK = 0x1F,
TP_EC_BACKLIGHT_CMDMSK = 0xE0,
TP_EC_BACKLIGHT_MAPSW = 0x20,
};
enum tpacpi_brightness_access_mode {
TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
TPACPI_BRGHT_MODE_EC, /* EC control */
TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
TPACPI_BRGHT_MODE_MAX
};
static struct backlight_device *ibm_backlight_device;
static enum tpacpi_brightness_access_mode brightness_mode =
TPACPI_BRGHT_MODE_MAX;
static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
static struct mutex brightness_mutex;
/* NVRAM brightness access,
* call with brightness_mutex held! */
static unsigned int tpacpi_brightness_nvram_get(void)
{
u8 lnvram;
lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
& TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
lnvram &= bright_maxlvl;
return lnvram;
}
static void tpacpi_brightness_checkpoint_nvram(void)
{
u8 lec = 0;
u8 b_nvram;
if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
return;
vdbg_printk(TPACPI_DBG_BRGHT,
"trying to checkpoint backlight level to NVRAM...\n");
if (mutex_lock_killable(&brightness_mutex) < 0)
return;
if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
goto unlock;
lec &= TP_EC_BACKLIGHT_LVLMSK;
b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
/* NVRAM needs update */
b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
TP_NVRAM_POS_LEVEL_BRIGHTNESS);
b_nvram |= lec;
nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
dbg_printk(TPACPI_DBG_BRGHT,
"updated NVRAM backlight level to %u (0x%02x)\n",
(unsigned int) lec, (unsigned int) b_nvram);
} else
vdbg_printk(TPACPI_DBG_BRGHT,
"NVRAM backlight level already is %u (0x%02x)\n",
(unsigned int) lec, (unsigned int) b_nvram);
unlock:
mutex_unlock(&brightness_mutex);
}
/* call with brightness_mutex held! */
static int tpacpi_brightness_get_raw(int *status)
{
u8 lec = 0;
switch (brightness_mode) {
case TPACPI_BRGHT_MODE_UCMS_STEP:
*status = tpacpi_brightness_nvram_get();
return 0;
case TPACPI_BRGHT_MODE_EC:
case TPACPI_BRGHT_MODE_ECNVRAM:
if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
return -EIO;
*status = lec;
return 0;
default:
return -ENXIO;
}
}
/* call with brightness_mutex held! */
/* do NOT call with illegal backlight level value */
static int tpacpi_brightness_set_ec(unsigned int value)
{
u8 lec = 0;
if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
return -EIO;
if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
(lec & TP_EC_BACKLIGHT_CMDMSK) |
(value & TP_EC_BACKLIGHT_LVLMSK))))
return -EIO;
return 0;
}
/* call with brightness_mutex held! */
static int tpacpi_brightness_set_ucmsstep(unsigned int value)
{
int cmos_cmd, inc;
unsigned int current_value, i;
current_value = tpacpi_brightness_nvram_get();
if (value == current_value)
return 0;
cmos_cmd = (value > current_value) ?
TP_CMOS_BRIGHTNESS_UP :
TP_CMOS_BRIGHTNESS_DOWN;
inc = (value > current_value) ? 1 : -1;
for (i = current_value; i != value; i += inc)
if (issue_thinkpad_cmos_command(cmos_cmd))
return -EIO;
return 0;
}
/* May return EINTR which can always be mapped to ERESTARTSYS */
static int brightness_set(unsigned int value)
{
int res;
if (value > bright_maxlvl)
return -EINVAL;
vdbg_printk(TPACPI_DBG_BRGHT,
"set backlight level to %d\n", value);
res = mutex_lock_killable(&brightness_mutex);
if (res < 0)
return res;
switch (brightness_mode) {
case TPACPI_BRGHT_MODE_EC:
case TPACPI_BRGHT_MODE_ECNVRAM:
res = tpacpi_brightness_set_ec(value);
break;
case TPACPI_BRGHT_MODE_UCMS_STEP:
res = tpacpi_brightness_set_ucmsstep(value);
break;
default:
res = -ENXIO;
}
mutex_unlock(&brightness_mutex);
return res;
}
/* sysfs backlight class ----------------------------------------------- */
static int brightness_update_status(struct backlight_device *bd)
{
unsigned int level =
(bd->props.fb_blank == FB_BLANK_UNBLANK &&
bd->props.power == FB_BLANK_UNBLANK) ?
bd->props.brightness : 0;
dbg_printk(TPACPI_DBG_BRGHT,
"backlight: attempt to set level to %d\n",
level);
/* it is the backlight class's job (caller) to handle
* EINTR and other errors properly */
return brightness_set(level);
}
static int brightness_get(struct backlight_device *bd)
{
int status, res;
res = mutex_lock_killable(&brightness_mutex);
if (res < 0)
return 0;
res = tpacpi_brightness_get_raw(&status);
mutex_unlock(&brightness_mutex);
if (res < 0)
return 0;
return status & TP_EC_BACKLIGHT_LVLMSK;
}
static void tpacpi_brightness_notify_change(void)
{
backlight_force_update(ibm_backlight_device,
BACKLIGHT_UPDATE_HOTKEY);
}
static const struct backlight_ops ibm_backlight_data = {
.get_brightness = brightness_get,
.update_status = brightness_update_status,
};
/* --------------------------------------------------------------------- */
/*
* Call _BCL method of video device. On some ThinkPads this will
* switch the firmware to the ACPI brightness control mode.
*/
static int __init tpacpi_query_bcl_levels(acpi_handle handle)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_device *device, *child;
int rc;
if (acpi_bus_get_device(handle, &device))
return 0;
rc = 0;
list_for_each_entry(child, &device->children, node) {
acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
NULL, &buffer);
if (ACPI_FAILURE(status))
continue;
obj = (union acpi_object *)buffer.pointer;
if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
pr_err("Unknown _BCL data, please report this to %s\n",
TPACPI_MAIL);
rc = 0;
} else {
rc = obj->package.count;
}
break;
}
kfree(buffer.pointer);
return rc;
}
/*
* Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
*/
static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
{
acpi_handle video_device;
int bcl_levels = 0;
tpacpi_acpi_handle_locate("video", NULL, &video_device);
if (video_device)
bcl_levels = tpacpi_query_bcl_levels(video_device);
tp_features.bright_acpimode = (bcl_levels > 0);
return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
}
/*
* These are only useful for models that have only one possibility
* of GPU. If the BIOS model handles both ATI and Intel, don't use
* these quirks.
*/
#define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
#define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
#define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
/* Models with ATI GPUs known to require ECNVRAM mode */
TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
/* Models with ATI GPUs that can use ECNVRAM */
TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
/* Models with Intel Extreme Graphics 2 */
TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
/* Models with Intel GMA900 */
TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
};
/*
* Returns < 0 for error, otherwise sets tp_features.bright_*
* and bright_maxlvl.
*/
static void __init tpacpi_detect_brightness_capabilities(void)
{
unsigned int b;
vdbg_printk(TPACPI_DBG_INIT,
"detecting firmware brightness interface capabilities\n");
/* we could run a quirks check here (same table used by
* brightness_init) if needed */
/*
* We always attempt to detect acpi support, so as to switch
* Lenovo Vista BIOS to ACPI brightness mode even if we are not
* going to publish a backlight interface
*/
b = tpacpi_check_std_acpi_brightness_support();
switch (b) {
case 16:
bright_maxlvl = 15;
break;
case 8:
case 0:
bright_maxlvl = 7;
break;
default:
tp_features.bright_unkfw = 1;
bright_maxlvl = b - 1;
}
pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
}
static int __init brightness_init(struct ibm_init_struct *iibm)
{
struct backlight_properties props;
int b;
unsigned long quirks;
vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
mutex_init(&brightness_mutex);
quirks = tpacpi_check_quirks(brightness_quirk_table,
ARRAY_SIZE(brightness_quirk_table));
/* tpacpi_detect_brightness_capabilities() must have run already */
/* if it is unknown, we don't handle it: it wouldn't be safe */
if (tp_features.bright_unkfw)
return 1;
if (!brightness_enable) {
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness support disabled by module parameter\n");
return 1;
}
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
if (brightness_enable > 1) {
pr_info("Standard ACPI backlight interface available, not loading native one\n");
return 1;
} else if (brightness_enable == 1) {
pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
return 1;
}
} else if (tp_features.bright_acpimode && brightness_enable > 1) {
pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n");
}
/*
* Check for module parameter bogosity, note that we
* init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
* able to detect "unspecified"
*/
if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
return -EINVAL;
/* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
brightness_mode == TPACPI_BRGHT_MODE_MAX) {
if (quirks & TPACPI_BRGHT_Q_EC)
brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
else
brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
dbg_printk(TPACPI_DBG_BRGHT,
"driver auto-selected brightness_mode=%d\n",
brightness_mode);
}
/* Safety */
if (!tpacpi_is_ibm() &&
(brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
brightness_mode == TPACPI_BRGHT_MODE_EC))
return -EINVAL;
if (tpacpi_brightness_get_raw(&b) < 0)
return 1;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = bright_maxlvl;
props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
NULL, NULL,
&ibm_backlight_data,
&props);
if (IS_ERR(ibm_backlight_device)) {
int rc = PTR_ERR(ibm_backlight_device);
ibm_backlight_device = NULL;
pr_err("Could not register backlight device\n");
return rc;
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness is supported\n");
if (quirks & TPACPI_BRGHT_Q_ASK) {
pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
brightness_mode);
pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
TPACPI_MAIL);
}
/* Added by mistake in early 2007. Probably useless, but it could
* be working around some unknown firmware problem where the value
* read at startup doesn't match the real hardware state... so leave
* it in place just in case */
backlight_update_status(ibm_backlight_device);
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness: registering brightness hotkeys as change notification\n");
tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
| TP_ACPI_HKEY_BRGHTUP_MASK
| TP_ACPI_HKEY_BRGHTDWN_MASK);
return 0;
}
static void brightness_suspend(void)
{
tpacpi_brightness_checkpoint_nvram();
}
static void brightness_shutdown(void)
{
tpacpi_brightness_checkpoint_nvram();
}
static void brightness_exit(void)
{
if (ibm_backlight_device) {
vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
"calling backlight_device_unregister()\n");
backlight_device_unregister(ibm_backlight_device);
}
tpacpi_brightness_checkpoint_nvram();
}
static int brightness_read(struct seq_file *m)
{
int level;
level = brightness_get(NULL);
if (level < 0) {
seq_printf(m, "level:\t\tunreadable\n");
} else {
seq_printf(m, "level:\t\t%d\n", level);
seq_printf(m, "commands:\tup, down\n");
seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
bright_maxlvl);
}
return 0;
}
static int brightness_write(char *buf)
{
int level;
int rc;
char *cmd;
level = brightness_get(NULL);
if (level < 0)
return level;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "up") == 0) {
if (level < bright_maxlvl)
level++;
} else if (strlencmp(cmd, "down") == 0) {
if (level > 0)
level--;
} else if (sscanf(cmd, "level %d", &level) == 1 &&
level >= 0 && level <= bright_maxlvl) {
/* new level set */
} else
return -EINVAL;
}
tpacpi_disclose_usertask("procfs brightness",
"set level to %d\n", level);
/*
* Now we know what the final level should be, so we try to set it.
* Doing it this way makes the syscall restartable in case of EINTR
*/
rc = brightness_set(level);
if (!rc && ibm_backlight_device)
backlight_force_update(ibm_backlight_device,
BACKLIGHT_UPDATE_SYSFS);
return (rc == -EINTR) ? -ERESTARTSYS : rc;
}
static struct ibm_struct brightness_driver_data = {
.name = "brightness",
.read = brightness_read,
.write = brightness_write,
.exit = brightness_exit,
.suspend = brightness_suspend,
.shutdown = brightness_shutdown,
};
/*************************************************************************
* Volume subdriver
*/
/*
* IBM ThinkPads have a simple volume controller with MUTE gating.
* Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
*
* Since the *61 series (and probably also the later *60 series), Lenovo
* ThinkPads only implement the MUTE gate.
*
* EC register 0x30
* Bit 6: MUTE (1 mutes sound)
* Bit 3-0: Volume
* Other bits should be zero as far as we know.
*
* This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
* bits 3-0 (volume). Other bits in NVRAM may have other functions,
* such as bit 7 which is used to detect repeated presses of MUTE,
* and we leave them unchanged.
*
* On newer Lenovo ThinkPads, the EC can automatically change the volume
* in response to user input. Unfortunately, this rarely works well.
* The laptop changes the state of its internal MUTE gate and, on some
* models, sends KEY_MUTE, causing any user code that responds to the
* mute button to get confused. The hardware MUTE gate is also
* unnecessary, since user code can handle the mute button without
* kernel or EC help.
*
* To avoid confusing userspace, we simply disable all EC-based mute
* and volume controls when possible.
*/
#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
#define TPACPI_ALSA_DRVNAME "ThinkPad EC"
#define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
#define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
#if SNDRV_CARDS <= 32
#define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
#else
#define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
#endif
static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
static char *alsa_id = "ThinkPadEC";
static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
struct tpacpi_alsa_data {
struct snd_card *card;
struct snd_ctl_elem_id *ctl_mute_id;
struct snd_ctl_elem_id *ctl_vol_id;
};
static struct snd_card *alsa_card;
enum {
TP_EC_AUDIO = 0x30,
/* TP_EC_AUDIO bits */
TP_EC_AUDIO_MUTESW = 6,
/* TP_EC_AUDIO bitmasks */
TP_EC_AUDIO_LVL_MSK = 0x0F,
TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
/* Maximum volume */
TP_EC_VOLUME_MAX = 14,
};
enum tpacpi_volume_access_mode {
TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
TPACPI_VOL_MODE_EC, /* Pure EC control */
TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
TPACPI_VOL_MODE_MAX
};
enum tpacpi_volume_capabilities {
TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
TPACPI_VOL_CAP_MAX
};
enum tpacpi_mute_btn_mode {
TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
/* We don't know what mode 1 is. */
TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
};
static enum tpacpi_volume_access_mode volume_mode =
TPACPI_VOL_MODE_MAX;
static enum tpacpi_volume_capabilities volume_capabilities;
static bool volume_control_allowed;
static bool software_mute_requested = true;
static bool software_mute_active;
static int software_mute_orig_mode;
/*
* Used to syncronize writers to TP_EC_AUDIO and
* TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
*/
static struct mutex volume_mutex;
static void tpacpi_volume_checkpoint_nvram(void)
{
u8 lec = 0;
u8 b_nvram;
u8 ec_mask;
if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
return;
if (!volume_control_allowed)
return;
if (software_mute_active)
return;
vdbg_printk(TPACPI_DBG_MIXER,
"trying to checkpoint mixer state to NVRAM...\n");
if (tp_features.mixer_no_level_control)
ec_mask = TP_EC_AUDIO_MUTESW_MSK;
else
ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
if (mutex_lock_killable(&volume_mutex) < 0)
return;
if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
goto unlock;
lec &= ec_mask;
b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
if (lec != (b_nvram & ec_mask)) {
/* NVRAM needs update */
b_nvram &= ~ec_mask;
b_nvram |= lec;
nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
dbg_printk(TPACPI_DBG_MIXER,
"updated NVRAM mixer status to 0x%02x (0x%02x)\n",
(unsigned int) lec, (unsigned int) b_nvram);
} else {
vdbg_printk(TPACPI_DBG_MIXER,
"NVRAM mixer status already is 0x%02x (0x%02x)\n",
(unsigned int) lec, (unsigned int) b_nvram);
}
unlock:
mutex_unlock(&volume_mutex);
}
static int volume_get_status_ec(u8 *status)
{
u8 s;
if (!acpi_ec_read(TP_EC_AUDIO, &s))
return -EIO;
*status = s;
dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
return 0;
}
static int volume_get_status(u8 *status)
{
return volume_get_status_ec(status);
}
static int volume_set_status_ec(const u8 status)
{
if (!acpi_ec_write(TP_EC_AUDIO, status))
return -EIO;
dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
/*
* On X200s, and possibly on others, it can take a while for
* reads to become correct.
*/
msleep(1);
return 0;
}
static int volume_set_status(const u8 status)
{
return volume_set_status_ec(status);
}
/* returns < 0 on error, 0 on no change, 1 on change */
static int __volume_set_mute_ec(const bool mute)
{
int rc;
u8 s, n;
if (mutex_lock_killable(&volume_mutex) < 0)
return -EINTR;
rc = volume_get_status_ec(&s);
if (rc)
goto unlock;
n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
s & ~TP_EC_AUDIO_MUTESW_MSK;
if (n != s) {
rc = volume_set_status_ec(n);
if (!rc)
rc = 1;
}
unlock:
mutex_unlock(&volume_mutex);
return rc;
}
static int volume_alsa_set_mute(const bool mute)
{
dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
(mute) ? "" : "un");
return __volume_set_mute_ec(mute);
}
static int volume_set_mute(const bool mute)
{
int rc;
dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
(mute) ? "" : "un");
rc = __volume_set_mute_ec(mute);
return (rc < 0) ? rc : 0;
}
/* returns < 0 on error, 0 on no change, 1 on change */
static int __volume_set_volume_ec(const u8 vol)
{
int rc;
u8 s, n;
if (vol > TP_EC_VOLUME_MAX)
return -EINVAL;
if (mutex_lock_killable(&volume_mutex) < 0)
return -EINTR;
rc = volume_get_status_ec(&s);
if (rc)
goto unlock;
n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
if (n != s) {
rc = volume_set_status_ec(n);
if (!rc)
rc = 1;
}
unlock:
mutex_unlock(&volume_mutex);
return rc;
}
static int volume_set_software_mute(bool startup)
{
int result;
if (!tpacpi_is_lenovo())
return -ENODEV;
if (startup) {
if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
"HAUM", "qd"))
return -EIO;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"Initial HAUM setting was %d\n",
software_mute_orig_mode);
}
if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
(int)TP_EC_MUTE_BTN_NONE))
return -EIO;
if (result != TP_EC_MUTE_BTN_NONE)
pr_warn("Unexpected SAUM result %d\n",
result);
/*
* In software mute mode, the standard codec controls take
* precendence, so we unmute the ThinkPad HW switch at
* startup. Just on case there are SAUM-capable ThinkPads
* with level controls, set max HW volume as well.
*/
if (tp_features.mixer_no_level_control)
result = volume_set_mute(false);
else
result = volume_set_status(TP_EC_VOLUME_MAX);
if (result != 0)
pr_warn("Failed to unmute the HW mute switch\n");
return 0;
}
static void volume_exit_software_mute(void)
{
int r;
if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
|| r != software_mute_orig_mode)
pr_warn("Failed to restore mute mode\n");
}
static int volume_alsa_set_volume(const u8 vol)
{
dbg_printk(TPACPI_DBG_MIXER,
"ALSA: trying to set volume level to %hu\n", vol);
return __volume_set_volume_ec(vol);
}
static void volume_alsa_notify_change(void)
{
struct tpacpi_alsa_data *d;
if (alsa_card && alsa_card->private_data) {
d = alsa_card->private_data;
if (d->ctl_mute_id)
snd_ctl_notify(alsa_card,
SNDRV_CTL_EVENT_MASK_VALUE,
d->ctl_mute_id);
if (d->ctl_vol_id)
snd_ctl_notify(alsa_card,
SNDRV_CTL_EVENT_MASK_VALUE,
d->ctl_vol_id);
}
}
static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = TP_EC_VOLUME_MAX;
return 0;
}
static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
u8 s;
int rc;
rc = volume_get_status(&s);
if (rc < 0)
return rc;
ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
return 0;
}
static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
ucontrol->value.integer.value[0]);
return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
}
#define volume_alsa_mute_info snd_ctl_boolean_mono_info
static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
u8 s;
int rc;
rc = volume_get_status(&s);
if (rc < 0)
return rc;
ucontrol->value.integer.value[0] =
(s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
return 0;
}
static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
tpacpi_disclose_usertask("ALSA", "%smute\n",
ucontrol->value.integer.value[0] ?
"un" : "");
return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
}
static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Console Playback Volume",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.info = volume_alsa_vol_info,
.get = volume_alsa_vol_get,
};
static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Console Playback Switch",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.info = volume_alsa_mute_info,
.get = volume_alsa_mute_get,
};
static void volume_suspend(void)
{
tpacpi_volume_checkpoint_nvram();
}
static void volume_resume(void)
{
if (software_mute_active) {
if (volume_set_software_mute(false) < 0)
pr_warn("Failed to restore software mute\n");
} else {
volume_alsa_notify_change();
}
}
static void volume_shutdown(void)
{
tpacpi_volume_checkpoint_nvram();
}
static void volume_exit(void)
{
if (alsa_card) {
snd_card_free(alsa_card);
alsa_card = NULL;
}
tpacpi_volume_checkpoint_nvram();
if (software_mute_active)
volume_exit_software_mute();
}
static int __init volume_create_alsa_mixer(void)
{
struct snd_card *card;
struct tpacpi_alsa_data *data;
struct snd_kcontrol *ctl_vol;
struct snd_kcontrol *ctl_mute;
int rc;
rc = snd_card_new(&tpacpi_pdev->dev,
alsa_index, alsa_id, THIS_MODULE,
sizeof(struct tpacpi_alsa_data), &card);
if (rc < 0 || !card) {
pr_err("Failed to create ALSA card structures: %d\n", rc);
return 1;
}
BUG_ON(!card->private_data);
data = card->private_data;
data->card = card;
strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
sizeof(card->driver));
strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
sizeof(card->shortname));
snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
(thinkpad_id.ec_version_str) ?
thinkpad_id.ec_version_str : "(unknown)");
snprintf(card->longname, sizeof(card->longname),
"%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
(thinkpad_id.ec_version_str) ?
thinkpad_id.ec_version_str : "unknown");
if (volume_control_allowed) {
volume_alsa_control_vol.put = volume_alsa_vol_put;
volume_alsa_control_vol.access =
SNDRV_CTL_ELEM_ACCESS_READWRITE;
volume_alsa_control_mute.put = volume_alsa_mute_put;
volume_alsa_control_mute.access =
SNDRV_CTL_ELEM_ACCESS_READWRITE;
}
if (!tp_features.mixer_no_level_control) {
ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
rc = snd_ctl_add(card, ctl_vol);
if (rc < 0) {
pr_err("Failed to create ALSA volume control: %d\n",
rc);
goto err_exit;
}
data->ctl_vol_id = &ctl_vol->id;
}
ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
rc = snd_ctl_add(card, ctl_mute);
if (rc < 0) {
pr_err("Failed to create ALSA mute control: %d\n", rc);
goto err_exit;
}
data->ctl_mute_id = &ctl_mute->id;
rc = snd_card_register(card);
if (rc < 0) {
pr_err("Failed to register ALSA card: %d\n", rc);
goto err_exit;
}
alsa_card = card;
return 0;
err_exit:
snd_card_free(card);
return 1;
}
#define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
#define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
/* Whitelist volume level on all IBM by default */
{ .vendor = PCI_VENDOR_ID_IBM,
.bios = TPACPI_MATCH_ANY,
.ec = TPACPI_MATCH_ANY,
.quirks = TPACPI_VOL_Q_LEVEL },
/* Lenovo models with volume control (needs confirmation) */
TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
/* Whitelist mute-only on all Lenovo by default */
{ .vendor = PCI_VENDOR_ID_LENOVO,
.bios = TPACPI_MATCH_ANY,
.ec = TPACPI_MATCH_ANY,
.quirks = TPACPI_VOL_Q_MUTEONLY }
};
static int __init volume_init(struct ibm_init_struct *iibm)
{
unsigned long quirks;
int rc;
vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
mutex_init(&volume_mutex);
/*
* Check for module parameter bogosity, note that we
* init volume_mode to TPACPI_VOL_MODE_MAX in order to be
* able to detect "unspecified"
*/
if (volume_mode > TPACPI_VOL_MODE_MAX)
return -EINVAL;
if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
pr_err("UCMS step volume mode not implemented, please contact %s\n",
TPACPI_MAIL);
return 1;
}
if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
return -EINVAL;
/*
* The ALSA mixer is our primary interface.
* When disabled, don't install the subdriver at all
*/
if (!alsa_enable) {
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"ALSA mixer disabled by parameter, not loading volume subdriver...\n");
return 1;
}
quirks = tpacpi_check_quirks(volume_quirk_table,
ARRAY_SIZE(volume_quirk_table));
switch (volume_capabilities) {
case TPACPI_VOL_CAP_AUTO:
if (quirks & TPACPI_VOL_Q_MUTEONLY)
tp_features.mixer_no_level_control = 1;
else if (quirks & TPACPI_VOL_Q_LEVEL)
tp_features.mixer_no_level_control = 0;
else
return 1; /* no mixer */
break;
case TPACPI_VOL_CAP_VOLMUTE:
tp_features.mixer_no_level_control = 0;
break;
case TPACPI_VOL_CAP_MUTEONLY:
tp_features.mixer_no_level_control = 1;
break;
default:
return 1;
}
if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"using user-supplied volume_capabilities=%d\n",
volume_capabilities);
if (volume_mode == TPACPI_VOL_MODE_AUTO ||
volume_mode == TPACPI_VOL_MODE_MAX) {
volume_mode = TPACPI_VOL_MODE_ECNVRAM;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"driver auto-selected volume_mode=%d\n",
volume_mode);
} else {
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"using user-supplied volume_mode=%d\n",
volume_mode);
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"mute is supported, volume control is %s\n",
str_supported(!tp_features.mixer_no_level_control));
if (software_mute_requested && volume_set_software_mute(true) == 0) {
software_mute_active = true;
} else {
rc = volume_create_alsa_mixer();
if (rc) {
pr_err("Could not create the ALSA mixer interface\n");
return rc;
}
pr_info("Console audio control enabled, mode: %s\n",
(volume_control_allowed) ?
"override (read/write)" :
"monitor (read only)");
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
"registering volume hotkeys as change notification\n");
tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
| TP_ACPI_HKEY_VOLUP_MASK
| TP_ACPI_HKEY_VOLDWN_MASK
| TP_ACPI_HKEY_MUTE_MASK);
return 0;
}
static int volume_read(struct seq_file *m)
{
u8 status;
if (volume_get_status(&status) < 0) {
seq_printf(m, "level:\t\tunreadable\n");
} else {
if (tp_features.mixer_no_level_control)
seq_printf(m, "level:\t\tunsupported\n");
else
seq_printf(m, "level:\t\t%d\n",
status & TP_EC_AUDIO_LVL_MSK);
seq_printf(m, "mute:\t\t%s\n",
onoff(status, TP_EC_AUDIO_MUTESW));
if (volume_control_allowed) {
seq_printf(m, "commands:\tunmute, mute\n");
if (!tp_features.mixer_no_level_control) {
seq_printf(m, "commands:\tup, down\n");
seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
TP_EC_VOLUME_MAX);
}
}
}
return 0;
}
static int volume_write(char *buf)
{
u8 s;
u8 new_level, new_mute;
int l;
char *cmd;
int rc;
/*
* We do allow volume control at driver startup, so that the
* user can set initial state through the volume=... parameter hack.
*/
if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
tp_warned.volume_ctrl_forbidden = 1;
pr_notice("Console audio control in monitor mode, changes are not allowed\n");
pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
}
return -EPERM;
}
rc = volume_get_status(&s);
if (rc < 0)
return rc;
new_level = s & TP_EC_AUDIO_LVL_MSK;
new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
while ((cmd = next_cmd(&buf))) {
if (!tp_features.mixer_no_level_control) {
if (strlencmp(cmd, "up") == 0) {
if (new_mute)
new_mute = 0;
else if (new_level < TP_EC_VOLUME_MAX)
new_level++;
continue;
} else if (strlencmp(cmd, "down") == 0) {
if (new_mute)
new_mute = 0;
else if (new_level > 0)
new_level--;
continue;
} else if (sscanf(cmd, "level %u", &l) == 1 &&
l >= 0 && l <= TP_EC_VOLUME_MAX) {
new_level = l;
continue;
}
}
if (strlencmp(cmd, "mute") == 0)
new_mute = TP_EC_AUDIO_MUTESW_MSK;
else if (strlencmp(cmd, "unmute") == 0)
new_mute = 0;
else
return -EINVAL;
}
if (tp_features.mixer_no_level_control) {
tpacpi_disclose_usertask("procfs volume", "%smute\n",
new_mute ? "" : "un");
rc = volume_set_mute(!!new_mute);
} else {
tpacpi_disclose_usertask("procfs volume",
"%smute and set level to %d\n",
new_mute ? "" : "un", new_level);
rc = volume_set_status(new_mute | new_level);
}
volume_alsa_notify_change();
return (rc == -EINTR) ? -ERESTARTSYS : rc;
}
static struct ibm_struct volume_driver_data = {
.name = "volume",
.read = volume_read,
.write = volume_write,
.exit = volume_exit,
.suspend = volume_suspend,
.resume = volume_resume,
.shutdown = volume_shutdown,
};
#else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
#define alsa_card NULL
static inline void volume_alsa_notify_change(void)
{
}
static int __init volume_init(struct ibm_init_struct *iibm)
{
pr_info("volume: disabled as there is no ALSA support in this kernel\n");
return 1;
}
static struct ibm_struct volume_driver_data = {
.name = "volume",
};
#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
/*************************************************************************
* Fan subdriver
*/
/*
* FAN ACCESS MODES
*
* TPACPI_FAN_RD_ACPI_GFAN:
* ACPI GFAN method: returns fan level
*
* see TPACPI_FAN_WR_ACPI_SFAN
* EC 0x2f (HFSP) not available if GFAN exists
*
* TPACPI_FAN_WR_ACPI_SFAN:
* ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
*
* EC 0x2f (HFSP) might be available *for reading*, but do not use
* it for writing.
*
* TPACPI_FAN_WR_TPEC:
* ThinkPad EC register 0x2f (HFSP): fan control loop mode
* Supported on almost all ThinkPads
*
* Fan speed changes of any sort (including those caused by the
* disengaged mode) are usually done slowly by the firmware as the
* maximum amount of fan duty cycle change per second seems to be
* limited.
*
* Reading is not available if GFAN exists.
* Writing is not available if SFAN exists.
*
* Bits
* 7 automatic mode engaged;
* (default operation mode of the ThinkPad)
* fan level is ignored in this mode.
* 6 full speed mode (takes precedence over bit 7);
* not available on all thinkpads. May disable
* the tachometer while the fan controller ramps up
* the speed (which can take up to a few *minutes*).
* Speeds up fan to 100% duty-cycle, which is far above
* the standard RPM levels. It is not impossible that
* it could cause hardware damage.
* 5-3 unused in some models. Extra bits for fan level
* in others, but still useless as all values above
* 7 map to the same speed as level 7 in these models.
* 2-0 fan level (0..7 usually)
* 0x00 = stop
* 0x07 = max (set when temperatures critical)
* Some ThinkPads may have other levels, see
* TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
*
* FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
* boot. Apparently the EC does not initialize it, so unless ACPI DSDT
* does so, its initial value is meaningless (0x07).
*
* For firmware bugs, refer to:
* http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
*
* ----
*
* ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
* Main fan tachometer reading (in RPM)
*
* This register is present on all ThinkPads with a new-style EC, and
* it is known not to be present on the A21m/e, and T22, as there is
* something else in offset 0x84 according to the ACPI DSDT. Other
* ThinkPads from this same time period (and earlier) probably lack the
* tachometer as well.
*
* Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
* was never fixed by IBM to report the EC firmware version string
* probably support the tachometer (like the early X models), so
* detecting it is quite hard. We need more data to know for sure.
*
* FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
* might result.
*
* FIRMWARE BUG: may go stale while the EC is switching to full speed
* mode.
*
* For firmware bugs, refer to:
* http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
*
* ----
*
* ThinkPad EC register 0x31 bit 0 (only on select models)
*
* When bit 0 of EC register 0x31 is zero, the tachometer registers
* show the speed of the main fan. When bit 0 of EC register 0x31
* is one, the tachometer registers show the speed of the auxiliary
* fan.
*
* Fan control seems to affect both fans, regardless of the state
* of this bit.
*
* So far, only the firmware for the X60/X61 non-tablet versions
* seem to support this (firmware TP-7M).
*
* TPACPI_FAN_WR_ACPI_FANS:
* ThinkPad X31, X40, X41. Not available in the X60.
*
* FANS ACPI handle: takes three arguments: low speed, medium speed,
* high speed. ACPI DSDT seems to map these three speeds to levels
* as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
* (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
*
* The speeds are stored on handles
* (FANA:FAN9), (FANC:FANB), (FANE:FAND).
*
* There are three default speed sets, accessible as handles:
* FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
*
* ACPI DSDT switches which set is in use depending on various
* factors.
*
* TPACPI_FAN_WR_TPEC is also available and should be used to
* command the fan. The X31/X40/X41 seems to have 8 fan levels,
* but the ACPI tables just mention level 7.
*/
enum { /* Fan control constants */
fan_status_offset = 0x2f, /* EC register 0x2f */
fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
* 0x84 must be read before 0x85 */
fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
bit 0 selects which fan is active */
TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
};
enum fan_status_access_mode {
TPACPI_FAN_NONE = 0, /* No fan status or control */
TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
};
enum fan_control_access_mode {
TPACPI_FAN_WR_NONE = 0, /* No fan control */
TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
};
enum fan_control_commands {
TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
* and also watchdog cmd */
};
static bool fan_control_allowed;
static enum fan_status_access_mode fan_status_access_mode;
static enum fan_control_access_mode fan_control_access_mode;
static enum fan_control_commands fan_control_commands;
static u8 fan_control_initial_status;
static u8 fan_control_desired_level;
static u8 fan_control_resume_level;
static int fan_watchdog_maxinterval;
static struct mutex fan_mutex;
static void fan_watchdog_fire(struct work_struct *ignored);
static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
"\\FSPD", /* 600e/x, 770e, 770x */
); /* all others */
TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
"JFNS", /* 770x-JL */
); /* all others */
/*
* Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
* HFSP register at boot, so it contains 0x07 but the Thinkpad could
* be in auto mode (0x80).
*
* This is corrected by any write to HFSP either by the driver, or
* by the firmware.
*
* We assume 0x07 really means auto mode while this quirk is active,
* as this is far more likely than the ThinkPad being in level 7,
* which is only used by the firmware during thermal emergencies.
*
* Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
* TP-70 (T43, R52), which are known to be buggy.
*/
static void fan_quirk1_setup(void)
{
if (fan_control_initial_status == 0x07) {
pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
tp_features.fan_ctrl_status_undef = 1;
}
}
static void fan_quirk1_handle(u8 *fan_status)
{
if (unlikely(tp_features.fan_ctrl_status_undef)) {
if (*fan_status != fan_control_initial_status) {
/* something changed the HFSP regisnter since
* driver init time, so it is not undefined
* anymore */
tp_features.fan_ctrl_status_undef = 0;
} else {
/* Return most likely status. In fact, it
* might be the only possible status */
*fan_status = TP_EC_FAN_AUTO;
}
}
}
/* Select main fan on X60/X61, NOOP on others */
static bool fan_select_fan1(void)
{
if (tp_features.second_fan) {
u8 val;
if (ec_read(fan_select_offset, &val) < 0)
return false;
val &= 0xFEU;
if (ec_write(fan_select_offset, val) < 0)
return false;
}
return true;
}
/* Select secondary fan on X60/X61 */
static bool fan_select_fan2(void)
{
u8 val;
if (!tp_features.second_fan)
return false;
if (ec_read(fan_select_offset, &val) < 0)
return false;
val |= 0x01U;
if (ec_write(fan_select_offset, val) < 0)
return false;
return true;
}
/*
* Call with fan_mutex held
*/
static void fan_update_desired_level(u8 status)
{
if ((status &
(TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
if (status > 7)
fan_control_desired_level = 7;
else
fan_control_desired_level = status;
}
}
static int fan_get_status(u8 *status)
{
u8 s;
/* TODO:
* Add TPACPI_FAN_RD_ACPI_FANS ? */
switch (fan_status_access_mode) {
case TPACPI_FAN_RD_ACPI_GFAN: {
/* 570, 600e/x, 770e, 770x */
int res;
if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
return -EIO;
if (likely(status))
*status = res & 0x07;
break;
}
case TPACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
return -EIO;
if (likely(status)) {
*status = s;
fan_quirk1_handle(status);
}
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_get_status_safe(u8 *status)
{
int rc;
u8 s;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = fan_get_status(&s);
if (!rc)
fan_update_desired_level(s);
mutex_unlock(&fan_mutex);
if (rc)
return rc;
if (status)
*status = s;
return 0;
}
static int fan_get_speed(unsigned int *speed)
{
u8 hi, lo;
switch (fan_status_access_mode) {
case TPACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if (unlikely(!fan_select_fan1()))
return -EIO;
if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
!acpi_ec_read(fan_rpm_offset + 1, &hi)))
return -EIO;
if (likely(speed))
*speed = (hi << 8) | lo;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan2_get_speed(unsigned int *speed)
{
u8 hi, lo;
bool rc;
switch (fan_status_access_mode) {
case TPACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if (unlikely(!fan_select_fan2()))
return -EIO;
rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
!acpi_ec_read(fan_rpm_offset + 1, &hi);
fan_select_fan1(); /* play it safe */
if (rc)
return -EIO;
if (likely(speed))
*speed = (hi << 8) | lo;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_level(int level)
{
if (!fan_control_allowed)
return -EPERM;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_SFAN:
if (level >= 0 && level <= 7) {
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
return -EIO;
} else
return -EINVAL;
break;
case TPACPI_FAN_WR_ACPI_FANS:
case TPACPI_FAN_WR_TPEC:
if (!(level & TP_EC_FAN_AUTO) &&
!(level & TP_EC_FAN_FULLSPEED) &&
((level < 0) || (level > 7)))
return -EINVAL;
/* safety net should the EC not support AUTO
* or FULLSPEED mode bits and just ignore them */
if (level & TP_EC_FAN_FULLSPEED)
level |= 7; /* safety min speed 7 */
else if (level & TP_EC_FAN_AUTO)
level |= 4; /* safety min speed 4 */
if (!acpi_ec_write(fan_status_offset, level))
return -EIO;
else
tp_features.fan_ctrl_status_undef = 0;
break;
default:
return -ENXIO;
}
vdbg_printk(TPACPI_DBG_FAN,
"fan control: set fan control register to 0x%02x\n", level);
return 0;
}
static int fan_set_level_safe(int level)
{
int rc;
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
if (level == TPACPI_FAN_LAST_LEVEL)
level = fan_control_desired_level;
rc = fan_set_level(level);
if (!rc)
fan_update_desired_level(level);
mutex_unlock(&fan_mutex);
return rc;
}
static int fan_set_enable(void)
{
u8 s;
int rc;
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_FANS:
case TPACPI_FAN_WR_TPEC:
rc = fan_get_status(&s);
if (rc < 0)
break;
/* Don't go out of emergency fan mode */
if (s != 7) {
s &= 0x07;
s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
}
if (!acpi_ec_write(fan_status_offset, s))
rc = -EIO;
else {
tp_features.fan_ctrl_status_undef = 0;
rc = 0;
}
break;
case TPACPI_FAN_WR_ACPI_SFAN:
rc = fan_get_status(&s);
if (rc < 0)
break;
s &= 0x07;
/* Set fan to at least level 4 */
s |= 4;
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
rc = -EIO;
else
rc = 0;
break;
default:
rc = -ENXIO;
}
mutex_unlock(&fan_mutex);
if (!rc)
vdbg_printk(TPACPI_DBG_FAN,
"fan control: set fan control register to 0x%02x\n",
s);
return rc;
}
static int fan_set_disable(void)
{
int rc;
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = 0;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_FANS:
case TPACPI_FAN_WR_TPEC:
if (!acpi_ec_write(fan_status_offset, 0x00))
rc = -EIO;
else {
fan_control_desired_level = 0;
tp_features.fan_ctrl_status_undef = 0;
}
break;
case TPACPI_FAN_WR_ACPI_SFAN:
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
rc = -EIO;
else
fan_control_desired_level = 0;
break;
default:
rc = -ENXIO;
}
if (!rc)
vdbg_printk(TPACPI_DBG_FAN,
"fan control: set fan control register to 0\n");
mutex_unlock(&fan_mutex);
return rc;
}
static int fan_set_speed(int speed)
{
int rc;
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = 0;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_FANS:
if (speed >= 0 && speed <= 65535) {
if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
speed, speed, speed))
rc = -EIO;
} else
rc = -EINVAL;
break;
default:
rc = -ENXIO;
}
mutex_unlock(&fan_mutex);
return rc;
}
static void fan_watchdog_reset(void)
{
if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
return;
if (fan_watchdog_maxinterval > 0 &&
tpacpi_lifecycle != TPACPI_LIFE_EXITING)
mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
else
cancel_delayed_work(&fan_watchdog_task);
}
static void fan_watchdog_fire(struct work_struct *ignored)
{
int rc;
if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
return;
pr_notice("fan watchdog: enabling fan\n");
rc = fan_set_enable();
if (rc < 0) {
pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
rc);
/* reschedule for later */
fan_watchdog_reset();
}
}
/*
* SYSFS fan layout: hwmon compatible (device)
*
* pwm*_enable:
* 0: "disengaged" mode
* 1: manual mode
* 2: native EC "auto" mode (recommended, hardware default)
*
* pwm*: set speed in manual mode, ignored otherwise.
* 0 is level 0; 255 is level 7. Intermediate points done with linear
* interpolation.
*
* fan*_input: tachometer reading, RPM
*
*
* SYSFS fan layout: extensions
*
* fan_watchdog (driver):
* fan watchdog interval in seconds, 0 disables (default), max 120
*/
/* sysfs fan pwm1_enable ----------------------------------------------- */
static ssize_t fan_pwm1_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res, mode;
u8 status;
res = fan_get_status_safe(&status);
if (res)
return res;
if (status & TP_EC_FAN_FULLSPEED) {
mode = 0;
} else if (status & TP_EC_FAN_AUTO) {
mode = 2;
} else
mode = 1;
return snprintf(buf, PAGE_SIZE, "%d\n", mode);
}
static ssize_t fan_pwm1_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
int res, level;
if (parse_strtoul(buf, 2, &t))
return -EINVAL;
tpacpi_disclose_usertask("hwmon pwm1_enable",
"set fan mode to %lu\n", t);
switch (t) {
case 0:
level = TP_EC_FAN_FULLSPEED;
break;
case 1:
level = TPACPI_FAN_LAST_LEVEL;
break;
case 2:
level = TP_EC_FAN_AUTO;
break;
case 3:
/* reserved for software-controlled auto mode */
return -ENOSYS;
default:
return -EINVAL;
}
res = fan_set_level_safe(level);
if (res == -ENXIO)
return -EINVAL;
else if (res < 0)
return res;
fan_watchdog_reset();
return count;
}
static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
fan_pwm1_enable_show, fan_pwm1_enable_store);
/* sysfs fan pwm1 ------------------------------------------------------ */
static ssize_t fan_pwm1_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res;
u8 status;
res = fan_get_status_safe(&status);
if (res)
return res;
if ((status &
(TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
status = fan_control_desired_level;
if (status > 7)
status = 7;
return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
}
static ssize_t fan_pwm1_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long s;
int rc;
u8 status, newlevel;
if (parse_strtoul(buf, 255, &s))
return -EINVAL;
tpacpi_disclose_usertask("hwmon pwm1",
"set fan speed to %lu\n", s);
/* scale down from 0-255 to 0-7 */
newlevel = (s >> 5) & 0x07;
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = fan_get_status(&status);
if (!rc && (status &
(TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
rc = fan_set_level(newlevel);
if (rc == -ENXIO)
rc = -EINVAL;
else if (!rc) {
fan_update_desired_level(newlevel);
fan_watchdog_reset();
}
}
mutex_unlock(&fan_mutex);
return (rc) ? rc : count;
}
static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
/* sysfs fan fan1_input ------------------------------------------------ */
static ssize_t fan_fan1_input_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res;
unsigned int speed;
res = fan_get_speed(&speed);
if (res < 0)
return res;
return snprintf(buf, PAGE_SIZE, "%u\n", speed);
}
static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
/* sysfs fan fan2_input ------------------------------------------------ */
static ssize_t fan_fan2_input_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res;
unsigned int speed;
res = fan2_get_speed(&speed);
if (res < 0)
return res;
return snprintf(buf, PAGE_SIZE, "%u\n", speed);
}
static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
}
static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 120, &t))
return -EINVAL;
if (!fan_control_allowed)
return -EPERM;
fan_watchdog_maxinterval = t;
fan_watchdog_reset();
tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
return count;
}
static DRIVER_ATTR_RW(fan_watchdog);
/* --------------------------------------------------------------------- */
static struct attribute *fan_attributes[] = {
&dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
&dev_attr_fan1_input.attr,
NULL, /* for fan2_input */
NULL
};
static const struct attribute_group fan_attr_group = {
.attrs = fan_attributes,
};
#define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
#define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
#define TPACPI_FAN_QI(__id1, __id2, __quirks) \
{ .vendor = PCI_VENDOR_ID_IBM, \
.bios = TPACPI_MATCH_ANY, \
.ec = TPID(__id1, __id2), \
.quirks = __quirks }
#define TPACPI_FAN_QL(__id1, __id2, __quirks) \
{ .vendor = PCI_VENDOR_ID_LENOVO, \
.bios = TPACPI_MATCH_ANY, \
.ec = TPID(__id1, __id2), \
.quirks = __quirks }
static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
};
#undef TPACPI_FAN_QL
#undef TPACPI_FAN_QI
static int __init fan_init(struct ibm_init_struct *iibm)
{
int rc;
unsigned long quirks;
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
"initializing fan subdriver\n");
mutex_init(&fan_mutex);
fan_status_access_mode = TPACPI_FAN_NONE;
fan_control_access_mode = TPACPI_FAN_WR_NONE;
fan_control_commands = 0;
fan_watchdog_maxinterval = 0;
tp_features.fan_ctrl_status_undef = 0;
tp_features.second_fan = 0;
fan_control_desired_level = 7;
if (tpacpi_is_ibm()) {
TPACPI_ACPIHANDLE_INIT(fans);
TPACPI_ACPIHANDLE_INIT(gfan);
TPACPI_ACPIHANDLE_INIT(sfan);
}
quirks = tpacpi_check_quirks(fan_quirk_table,
ARRAY_SIZE(fan_quirk_table));
if (gfan_handle) {
/* 570, 600e/x, 770e, 770x */
fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
} else {
/* all other ThinkPads: note that even old-style
* ThinkPad ECs supports the fan control register */
if (likely(acpi_ec_read(fan_status_offset,
&fan_control_initial_status))) {
fan_status_access_mode = TPACPI_FAN_RD_TPEC;
if (quirks & TPACPI_FAN_Q1)
fan_quirk1_setup();
if (quirks & TPACPI_FAN_2FAN) {
tp_features.second_fan = 1;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
"secondary fan support enabled\n");
}
} else {
pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
return 1;
}
}
if (sfan_handle) {
/* 570, 770x-JL */
fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
fan_control_commands |=
TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
} else {
if (!gfan_handle) {
/* gfan without sfan means no fan control */
/* all other models implement TP EC 0x2f control */
if (fans_handle) {
/* X31, X40, X41 */
fan_control_access_mode =
TPACPI_FAN_WR_ACPI_FANS;
fan_control_commands |=
TPACPI_FAN_CMD_SPEED |
TPACPI_FAN_CMD_LEVEL |
TPACPI_FAN_CMD_ENABLE;
} else {
fan_control_access_mode = TPACPI_FAN_WR_TPEC;
fan_control_commands |=
TPACPI_FAN_CMD_LEVEL |
TPACPI_FAN_CMD_ENABLE;
}
}
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
"fan is %s, modes %d, %d\n",
str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
fan_control_access_mode != TPACPI_FAN_WR_NONE),
fan_status_access_mode, fan_control_access_mode);
/* fan control master switch */
if (!fan_control_allowed) {
fan_control_access_mode = TPACPI_FAN_WR_NONE;
fan_control_commands = 0;
dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
"fan control features disabled by parameter\n");
}
/* update fan_control_desired_level */
if (fan_status_access_mode != TPACPI_FAN_NONE)
fan_get_status_safe(NULL);
if (fan_status_access_mode != TPACPI_FAN_NONE ||
fan_control_access_mode != TPACPI_FAN_WR_NONE) {
if (tp_features.second_fan) {
/* attach second fan tachometer */
fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
&dev_attr_fan2_input.attr;
}
rc = sysfs_create_group(&tpacpi_hwmon->kobj,
&fan_attr_group);
if (rc < 0)
return rc;
rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
&driver_attr_fan_watchdog);
if (rc < 0) {
sysfs_remove_group(&tpacpi_hwmon->kobj,
&fan_attr_group);
return rc;
}
return 0;
} else
return 1;
}
static void fan_exit(void)
{
vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
"cancelling any pending fan watchdog tasks\n");
/* FIXME: can we really do this unconditionally? */
sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
driver_remove_file(&tpacpi_hwmon_pdriver.driver,
&driver_attr_fan_watchdog);
cancel_delayed_work(&fan_watchdog_task);
flush_workqueue(tpacpi_wq);
}
static void fan_suspend(void)
{
int rc;
if (!fan_control_allowed)
return;
/* Store fan status in cache */
fan_control_resume_level = 0;
rc = fan_get_status_safe(&fan_control_resume_level);
if (rc < 0)
pr_notice("failed to read fan level for later restore during resume: %d\n",
rc);
/* if it is undefined, don't attempt to restore it.
* KEEP THIS LAST */
if (tp_features.fan_ctrl_status_undef)
fan_control_resume_level = 0;
}
static void fan_resume(void)
{
u8 current_level = 7;
bool do_set = false;
int rc;
/* DSDT *always* updates status on resume */
tp_features.fan_ctrl_status_undef = 0;
if (!fan_control_allowed ||
!fan_control_resume_level ||
(fan_get_status_safe(&current_level) < 0))
return;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_SFAN:
/* never decrease fan level */
do_set = (fan_control_resume_level > current_level);
break;
case TPACPI_FAN_WR_ACPI_FANS:
case TPACPI_FAN_WR_TPEC:
/* never decrease fan level, scale is:
* TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
*
* We expect the firmware to set either 7 or AUTO, but we
* handle FULLSPEED out of paranoia.
*
* So, we can safely only restore FULLSPEED or 7, anything
* else could slow the fan. Restoring AUTO is useless, at
* best that's exactly what the DSDT already set (it is the
* slower it uses).
*
* Always keep in mind that the DSDT *will* have set the
* fans to what the vendor supposes is the best level. We
* muck with it only to speed the fan up.
*/
if (fan_control_resume_level != 7 &&
!(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
return;
else
do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
(current_level != fan_control_resume_level);
break;
default:
return;
}
if (do_set) {
pr_notice("restoring fan level to 0x%02x\n",
fan_control_resume_level);
rc = fan_set_level_safe(fan_control_resume_level);
if (rc < 0)
pr_notice("failed to restore fan level: %d\n", rc);
}
}
static int fan_read(struct seq_file *m)
{
int rc;
u8 status;
unsigned int speed = 0;
switch (fan_status_access_mode) {
case TPACPI_FAN_RD_ACPI_GFAN:
/* 570, 600e/x, 770e, 770x */
rc = fan_get_status_safe(&status);
if (rc < 0)
return rc;
seq_printf(m, "status:\t\t%s\n"
"level:\t\t%d\n",
(status != 0) ? "enabled" : "disabled", status);
break;
case TPACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
rc = fan_get_status_safe(&status);
if (rc < 0)
return rc;
seq_printf(m, "status:\t\t%s\n",
(status != 0) ? "enabled" : "disabled");
rc = fan_get_speed(&speed);
if (rc < 0)
return rc;
seq_printf(m, "speed:\t\t%d\n", speed);
if (status & TP_EC_FAN_FULLSPEED)
/* Disengaged mode takes precedence */
seq_printf(m, "level:\t\tdisengaged\n");
else if (status & TP_EC_FAN_AUTO)
seq_printf(m, "level:\t\tauto\n");
else
seq_printf(m, "level:\t\t%d\n", status);
break;
case TPACPI_FAN_NONE:
default:
seq_printf(m, "status:\t\tnot supported\n");
}
if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
seq_printf(m, "commands:\tlevel <level>");
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_SFAN:
seq_printf(m, " (<level> is 0-7)\n");
break;
default:
seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
break;
}
}
if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
seq_printf(m, "commands:\tenable, disable\n"
"commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
return 0;
}
static int fan_write_cmd_level(const char *cmd, int *rc)
{
int level;
if (strlencmp(cmd, "level auto") == 0)
level = TP_EC_FAN_AUTO;
else if ((strlencmp(cmd, "level disengaged") == 0) |
(strlencmp(cmd, "level full-speed") == 0))
level = TP_EC_FAN_FULLSPEED;
else if (sscanf(cmd, "level %d", &level) != 1)
return 0;
*rc = fan_set_level_safe(level);
if (*rc == -ENXIO)
pr_err("level command accepted for unsupported access mode %d\n",
fan_control_access_mode);
else if (!*rc)
tpacpi_disclose_usertask("procfs fan",
"set level to %d\n", level);
return 1;
}
static int fan_write_cmd_enable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "enable") != 0)
return 0;
*rc = fan_set_enable();
if (*rc == -ENXIO)
pr_err("enable command accepted for unsupported access mode %d\n",
fan_control_access_mode);
else if (!*rc)
tpacpi_disclose_usertask("procfs fan", "enable\n");
return 1;
}
static int fan_write_cmd_disable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "disable") != 0)
return 0;
*rc = fan_set_disable();
if (*rc == -ENXIO)
pr_err("disable command accepted for unsupported access mode %d\n",
fan_control_access_mode);
else if (!*rc)
tpacpi_disclose_usertask("procfs fan", "disable\n");
return 1;
}
static int fan_write_cmd_speed(const char *cmd, int *rc)
{
int speed;
/* TODO:
* Support speed <low> <medium> <high> ? */
if (sscanf(cmd, "speed %d", &speed) != 1)
return 0;
*rc = fan_set_speed(speed);
if (*rc == -ENXIO)
pr_err("speed command accepted for unsupported access mode %d\n",
fan_control_access_mode);
else if (!*rc)
tpacpi_disclose_usertask("procfs fan",
"set speed to %d\n", speed);
return 1;
}
static int fan_write_cmd_watchdog(const char *cmd, int *rc)
{
int interval;
if (sscanf(cmd, "watchdog %d", &interval) != 1)
return 0;
if (interval < 0 || interval > 120)
*rc = -EINVAL;
else {
fan_watchdog_maxinterval = interval;
tpacpi_disclose_usertask("procfs fan",
"set watchdog timer to %d\n",
interval);
}
return 1;
}
static int fan_write(char *buf)
{
char *cmd;
int rc = 0;
while (!rc && (cmd = next_cmd(&buf))) {
if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
fan_write_cmd_level(cmd, &rc)) &&
!((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
(fan_write_cmd_enable(cmd, &rc) ||
fan_write_cmd_disable(cmd, &rc) ||
fan_write_cmd_watchdog(cmd, &rc))) &&
!((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
fan_write_cmd_speed(cmd, &rc))
)
rc = -EINVAL;
else if (!rc)
fan_watchdog_reset();
}
return rc;
}
static struct ibm_struct fan_driver_data = {
.name = "fan",
.read = fan_read,
.write = fan_write,
.exit = fan_exit,
.suspend = fan_suspend,
.resume = fan_resume,
};
/*************************************************************************
* Mute LED subdriver
*/
struct tp_led_table {
acpi_string name;
int on_value;
int off_value;
int state;
};
static struct tp_led_table led_tables[] = {
[TPACPI_LED_MUTE] = {
.name = "SSMS",
.on_value = 1,
.off_value = 0,
},
[TPACPI_LED_MICMUTE] = {
.name = "MMTS",
.on_value = 2,
.off_value = 0,
},
};
static int mute_led_on_off(struct tp_led_table *t, bool state)
{
acpi_handle temp;
int output;
if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
return -EIO;
}
if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
state ? t->on_value : t->off_value))
return -EIO;
t->state = state;
return state;
}
int tpacpi_led_set(int whichled, bool on)
{
struct tp_led_table *t;
if (whichled < 0 || whichled >= TPACPI_LED_MAX)
return -EINVAL;
t = &led_tables[whichled];
if (t->state < 0 || t->state == on)
return t->state;
return mute_led_on_off(t, on);
}
EXPORT_SYMBOL_GPL(tpacpi_led_set);
static int mute_led_init(struct ibm_init_struct *iibm)
{
acpi_handle temp;
int i;
for (i = 0; i < TPACPI_LED_MAX; i++) {
struct tp_led_table *t = &led_tables[i];
if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
mute_led_on_off(t, false);
else
t->state = -ENODEV;
}
return 0;
}
static void mute_led_exit(void)
{
int i;
for (i = 0; i < TPACPI_LED_MAX; i++)
tpacpi_led_set(i, false);
}
static void mute_led_resume(void)
{
int i;
for (i = 0; i < TPACPI_LED_MAX; i++) {
struct tp_led_table *t = &led_tables[i];
if (t->state >= 0)
mute_led_on_off(t, t->state);
}
}
static struct ibm_struct mute_led_driver_data = {
.name = "mute_led",
.exit = mute_led_exit,
.resume = mute_led_resume,
};
/****************************************************************************
****************************************************************************
*
* Infrastructure
*
****************************************************************************
****************************************************************************/
/*
* HKEY event callout for other subdrivers go here
* (yes, it is ugly, but it is quick, safe, and gets the job done
*/
static void tpacpi_driver_event(const unsigned int hkey_event)
{
if (ibm_backlight_device) {
switch (hkey_event) {
case TP_HKEY_EV_BRGHT_UP:
case TP_HKEY_EV_BRGHT_DOWN:
tpacpi_brightness_notify_change();
}
}
if (alsa_card) {
switch (hkey_event) {
case TP_HKEY_EV_VOL_UP:
case TP_HKEY_EV_VOL_DOWN:
case TP_HKEY_EV_VOL_MUTE:
volume_alsa_notify_change();
}
}
if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
enum led_brightness brightness;
mutex_lock(&kbdlight_mutex);
/*
* Check the brightness actually changed, setting the brightness
* through kbdlight_set_level() also triggers this event.
*/
brightness = kbdlight_sysfs_get(NULL);
if (kbdlight_brightness != brightness) {
kbdlight_brightness = brightness;
led_classdev_notify_brightness_hw_changed(
&tpacpi_led_kbdlight.led_classdev, brightness);
}
mutex_unlock(&kbdlight_mutex);
}
}
static void hotkey_driver_event(const unsigned int scancode)
{
tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
}
/* --------------------------------------------------------------------- */
/* /proc support */
static struct proc_dir_entry *proc_dir;
/*
* Module and infrastructure proble, init and exit handling
*/
static bool force_load;
#ifdef CONFIG_THINKPAD_ACPI_DEBUG
static const char * __init str_supported(int is_supported)
{
static char text_unsupported[] __initdata = "not supported";
return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
}
#endif /* CONFIG_THINKPAD_ACPI_DEBUG */
static void ibm_exit(struct ibm_struct *ibm)
{
dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
list_del_init(&ibm->all_drivers);
if (ibm->flags.acpi_notify_installed) {
dbg_printk(TPACPI_DBG_EXIT,
"%s: acpi_remove_notify_handler\n", ibm->name);
BUG_ON(!ibm->acpi);
acpi_remove_notify_handler(*ibm->acpi->handle,
ibm->acpi->type,
dispatch_acpi_notify);
ibm->flags.acpi_notify_installed = 0;
}
if (ibm->flags.proc_created) {
dbg_printk(TPACPI_DBG_EXIT,
"%s: remove_proc_entry\n", ibm->name);
remove_proc_entry(ibm->name, proc_dir);
ibm->flags.proc_created = 0;
}
if (ibm->flags.acpi_driver_registered) {
dbg_printk(TPACPI_DBG_EXIT,
"%s: acpi_bus_unregister_driver\n", ibm->name);
BUG_ON(!ibm->acpi);
acpi_bus_unregister_driver(ibm->acpi->driver);
kfree(ibm->acpi->driver);
ibm->acpi->driver = NULL;
ibm->flags.acpi_driver_registered = 0;
}
if (ibm->flags.init_called && ibm->exit) {
ibm->exit();
ibm->flags.init_called = 0;
}
dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
}
static int __init ibm_init(struct ibm_init_struct *iibm)
{
int ret;
struct ibm_struct *ibm = iibm->data;
struct proc_dir_entry *entry;
BUG_ON(ibm == NULL);
INIT_LIST_HEAD(&ibm->all_drivers);
if (ibm->flags.experimental && !experimental)
return 0;
dbg_printk(TPACPI_DBG_INIT,
"probing for %s\n", ibm->name);
if (iibm->init) {
ret = iibm->init(iibm);
if (ret > 0)
return 0; /* probe failed */
if (ret)
return ret;
ibm->flags.init_called = 1;
}
if (ibm->acpi) {
if (ibm->acpi->hid) {
ret = register_tpacpi_subdriver(ibm);
if (ret)
goto err_out;
}
if (ibm->acpi->notify) {
ret = setup_acpi_notify(ibm);
if (ret == -ENODEV) {
pr_notice("disabling subdriver %s\n",
ibm->name);
ret = 0;
goto err_out;
}
if (ret < 0)
goto err_out;
}
}
dbg_printk(TPACPI_DBG_INIT,
"%s installed\n", ibm->name);
if (ibm->read) {
umode_t mode = iibm->base_procfs_mode;
if (!mode)
mode = S_IRUGO;
if (ibm->write)
mode |= S_IWUSR;
entry = proc_create_data(ibm->name, mode, proc_dir,
&dispatch_proc_fops, ibm);
if (!entry) {
pr_err("unable to create proc entry %s\n", ibm->name);
ret = -ENODEV;
goto err_out;
}
ibm->flags.proc_created = 1;
}
list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
return 0;
err_out:
dbg_printk(TPACPI_DBG_INIT,
"%s: at error exit path with result %d\n",
ibm->name, ret);
ibm_exit(ibm);
return (ret < 0) ? ret : 0;
}
/* Probing */
static bool __pure __init tpacpi_is_fw_digit(const char c)
{
return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
}
static bool __pure __init tpacpi_is_valid_fw_id(const char * const s,
const char t)
{
/*
* Most models: xxyTkkWW (#.##c)
* Ancient 570/600 and -SL lacks (#.##c)
*/
if (s && strlen(s) >= 8 &&
tpacpi_is_fw_digit(s[0]) &&
tpacpi_is_fw_digit(s[1]) &&
s[2] == t &&
(s[3] == 'T' || s[3] == 'N') &&
tpacpi_is_fw_digit(s[4]) &&
tpacpi_is_fw_digit(s[5]))
return true;
/* New models: xxxyTkkW (#.##c); T550 and some others */
return s && strlen(s) >= 8 &&
tpacpi_is_fw_digit(s[0]) &&
tpacpi_is_fw_digit(s[1]) &&
tpacpi_is_fw_digit(s[2]) &&
s[3] == t &&
(s[4] == 'T' || s[4] == 'N') &&
tpacpi_is_fw_digit(s[5]) &&
tpacpi_is_fw_digit(s[6]);
}
/* returns 0 - probe ok, or < 0 - probe error.
* Probe ok doesn't mean thinkpad found.
* On error, kfree() cleanup on tp->* is not performed, caller must do it */
static int __must_check __init get_thinkpad_model_data(
struct thinkpad_id_data *tp)
{
const struct dmi_device *dev = NULL;
char ec_fw_string[18];
char const *s;
if (!tp)
return -EINVAL;
memset(tp, 0, sizeof(*tp));
if (dmi_name_in_vendors("IBM"))
tp->vendor = PCI_VENDOR_ID_IBM;
else if (dmi_name_in_vendors("LENOVO"))
tp->vendor = PCI_VENDOR_ID_LENOVO;
else
return 0;
s = dmi_get_system_info(DMI_BIOS_VERSION);
tp->bios_version_str = kstrdup(s, GFP_KERNEL);
if (s && !tp->bios_version_str)
return -ENOMEM;
/* Really ancient ThinkPad 240X will fail this, which is fine */
if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
return 0;
tp->bios_model = tp->bios_version_str[0]
| (tp->bios_version_str[1] << 8);
tp->bios_release = (tp->bios_version_str[4] << 8)
| tp->bios_version_str[5];
/*
* ThinkPad T23 or newer, A31 or newer, R50e or newer,
* X32 or newer, all Z series; Some models must have an
* up-to-date BIOS or they will not be detected.
*
* See http://thinkwiki.org/wiki/List_of_DMI_IDs
*/
while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
if (sscanf(dev->name,
"IBM ThinkPad Embedded Controller -[%17c",
ec_fw_string) == 1) {
ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
if (!tp->ec_version_str)
return -ENOMEM;
if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
tp->ec_model = ec_fw_string[0]
| (ec_fw_string[1] << 8);
tp->ec_release = (ec_fw_string[4] << 8)
| ec_fw_string[5];
} else {
pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
ec_fw_string);
pr_notice("please report this to %s\n",
TPACPI_MAIL);
}
break;
}
}
s = dmi_get_system_info(DMI_PRODUCT_VERSION);
if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
tp->model_str = kstrdup(s, GFP_KERNEL);
if (!tp->model_str)
return -ENOMEM;
} else {
s = dmi_get_system_info(DMI_BIOS_VENDOR);
if (s && !(strncasecmp(s, "Lenovo", 6))) {
tp->model_str = kstrdup(s, GFP_KERNEL);
if (!tp->model_str)
return -ENOMEM;
}
}
s = dmi_get_system_info(DMI_PRODUCT_NAME);
tp->nummodel_str = kstrdup(s, GFP_KERNEL);
if (s && !tp->nummodel_str)
return -ENOMEM;
return 0;
}
static int __init probe_for_thinkpad(void)
{
int is_thinkpad;
if (acpi_disabled)
return -ENODEV;
/* It would be dangerous to run the driver in this case */
if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
return -ENODEV;
/*
* Non-ancient models have better DMI tagging, but very old models
* don't. tpacpi_is_fw_known() is a cheat to help in that case.
*/
is_thinkpad = (thinkpad_id.model_str != NULL) ||
(thinkpad_id.ec_model != 0) ||
tpacpi_is_fw_known();
/* The EC handler is required */
tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
if (!ec_handle) {
if (is_thinkpad)
pr_err("Not yet supported ThinkPad detected!\n");
return -ENODEV;
}
if (!is_thinkpad && !force_load)
return -ENODEV;
return 0;
}
static void __init thinkpad_acpi_init_banner(void)
{
pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
pr_info("%s\n", TPACPI_URL);
pr_info("ThinkPad BIOS %s, EC %s\n",
(thinkpad_id.bios_version_str) ?
thinkpad_id.bios_version_str : "unknown",
(thinkpad_id.ec_version_str) ?
thinkpad_id.ec_version_str : "unknown");
BUG_ON(!thinkpad_id.vendor);
if (thinkpad_id.model_str)
pr_info("%s %s, model %s\n",
(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
"IBM" : ((thinkpad_id.vendor ==
PCI_VENDOR_ID_LENOVO) ?
"Lenovo" : "Unknown vendor"),
thinkpad_id.model_str,
(thinkpad_id.nummodel_str) ?
thinkpad_id.nummodel_str : "unknown");
}
/* Module init, exit, parameters */
static struct ibm_init_struct ibms_init[] __initdata = {
{
.data = &thinkpad_acpi_driver_data,
},
{
.init = hotkey_init,
.data = &hotkey_driver_data,
},
{
.init = bluetooth_init,
.data = &bluetooth_driver_data,
},
{
.init = wan_init,
.data = &wan_driver_data,
},
{
.init = uwb_init,
.data = &uwb_driver_data,
},
#ifdef CONFIG_THINKPAD_ACPI_VIDEO
{
.init = video_init,
.base_procfs_mode = S_IRUSR,
.data = &video_driver_data,
},
#endif
{
.init = kbdlight_init,
.data = &kbdlight_driver_data,
},
{
.init = light_init,
.data = &light_driver_data,
},
{
.init = cmos_init,
.data = &cmos_driver_data,
},
{
.init = led_init,
.data = &led_driver_data,
},
{
.init = beep_init,
.data = &beep_driver_data,
},
{
.init = thermal_init,
.data = &thermal_driver_data,
},
{
.init = brightness_init,
.data = &brightness_driver_data,
},
{
.init = volume_init,
.data = &volume_driver_data,
},
{
.init = fan_init,
.data = &fan_driver_data,
},
{
.init = mute_led_init,
.data = &mute_led_driver_data,
},
};
static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
{
unsigned int i;
struct ibm_struct *ibm;
if (!kp || !kp->name || !val)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
ibm = ibms_init[i].data;
WARN_ON(ibm == NULL);
if (!ibm || !ibm->name)
continue;
if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
if (strlen(val) > sizeof(ibms_init[i].param) - 2)
return -ENOSPC;
strcpy(ibms_init[i].param, val);
strcat(ibms_init[i].param, ",");
return 0;
}
}
return -EINVAL;
}
module_param(experimental, int, 0444);
MODULE_PARM_DESC(experimental,
"Enables experimental features when non-zero");
module_param_named(debug, dbg_level, uint, 0);
MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
module_param(force_load, bool, 0444);
MODULE_PARM_DESC(force_load,
"Attempts to load the driver even on a mis-identified ThinkPad when true");
module_param_named(fan_control, fan_control_allowed, bool, 0444);
MODULE_PARM_DESC(fan_control,
"Enables setting fan parameters features when true");
module_param_named(brightness_mode, brightness_mode, uint, 0444);
MODULE_PARM_DESC(brightness_mode,
"Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
module_param(brightness_enable, uint, 0444);
MODULE_PARM_DESC(brightness_enable,
"Enables backlight control when 1, disables when 0");
#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
module_param_named(volume_mode, volume_mode, uint, 0444);
MODULE_PARM_DESC(volume_mode,
"Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
MODULE_PARM_DESC(volume_capabilities,
"Selects the mixer capabilites: 0=auto, 1=volume and mute, 2=mute only");
module_param_named(volume_control, volume_control_allowed, bool, 0444);
MODULE_PARM_DESC(volume_control,
"Enables software override for the console audio control when true");
module_param_named(software_mute, software_mute_requested, bool, 0444);
MODULE_PARM_DESC(software_mute,
"Request full software mute control");
/* ALSA module API parameters */
module_param_named(index, alsa_index, int, 0444);
MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
module_param_named(id, alsa_id, charp, 0444);
MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
module_param_named(enable, alsa_enable, bool, 0444);
MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
/* The module parameter can't be read back, that's why 0 is used here */
#define TPACPI_PARAM(feature) \
module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
TPACPI_PARAM(hotkey);
TPACPI_PARAM(bluetooth);
TPACPI_PARAM(video);
TPACPI_PARAM(light);
TPACPI_PARAM(cmos);
TPACPI_PARAM(led);
TPACPI_PARAM(beep);
TPACPI_PARAM(brightness);
TPACPI_PARAM(volume);
TPACPI_PARAM(fan);
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
module_param(dbg_wlswemul, uint, 0444);
MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
MODULE_PARM_DESC(wlsw_state,
"Initial state of the emulated WLSW switch");
module_param(dbg_bluetoothemul, uint, 0444);
MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
MODULE_PARM_DESC(bluetooth_state,
"Initial state of the emulated bluetooth switch");
module_param(dbg_wwanemul, uint, 0444);
MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
MODULE_PARM_DESC(wwan_state,
"Initial state of the emulated WWAN switch");
module_param(dbg_uwbemul, uint, 0444);
MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
MODULE_PARM_DESC(uwb_state,
"Initial state of the emulated UWB switch");
#endif
static void thinkpad_acpi_module_exit(void)
{
struct ibm_struct *ibm, *itmp;
tpacpi_lifecycle = TPACPI_LIFE_EXITING;
list_for_each_entry_safe_reverse(ibm, itmp,
&tpacpi_all_drivers,
all_drivers) {
ibm_exit(ibm);
}
dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
if (tpacpi_inputdev) {
if (tp_features.input_device_registered)
input_unregister_device(tpacpi_inputdev);
else
input_free_device(tpacpi_inputdev);
kfree(hotkey_keycode_map);
}
if (tpacpi_hwmon)
hwmon_device_unregister(tpacpi_hwmon);
if (tpacpi_sensors_pdev)
platform_device_unregister(tpacpi_sensors_pdev);
if (tpacpi_pdev)
platform_device_unregister(tpacpi_pdev);
if (tp_features.sensors_pdrv_attrs_registered)
tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
if (tp_features.platform_drv_attrs_registered)
tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
if (tp_features.sensors_pdrv_registered)
platform_driver_unregister(&tpacpi_hwmon_pdriver);
if (tp_features.platform_drv_registered)
platform_driver_unregister(&tpacpi_pdriver);
if (proc_dir)
remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
if (tpacpi_wq)
destroy_workqueue(tpacpi_wq);
kfree(thinkpad_id.bios_version_str);
kfree(thinkpad_id.ec_version_str);
kfree(thinkpad_id.model_str);
kfree(thinkpad_id.nummodel_str);
}
static int __init thinkpad_acpi_module_init(void)
{
int ret, i;
tpacpi_lifecycle = TPACPI_LIFE_INIT;
/* Driver-level probe */
ret = get_thinkpad_model_data(&thinkpad_id);
if (ret) {
pr_err("unable to get DMI data: %d\n", ret);
thinkpad_acpi_module_exit();
return ret;
}
ret = probe_for_thinkpad();
if (ret) {
thinkpad_acpi_module_exit();
return ret;
}
/* Driver initialization */
thinkpad_acpi_init_banner();
tpacpi_check_outdated_fw();
TPACPI_ACPIHANDLE_INIT(ecrd);
TPACPI_ACPIHANDLE_INIT(ecwr);
tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
if (!tpacpi_wq) {
thinkpad_acpi_module_exit();
return -ENOMEM;
}
proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
if (!proc_dir) {
pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
thinkpad_acpi_module_exit();
return -ENODEV;
}
ret = platform_driver_register(&tpacpi_pdriver);
if (ret) {
pr_err("unable to register main platform driver\n");
thinkpad_acpi_module_exit();
return ret;
}
tp_features.platform_drv_registered = 1;
ret = platform_driver_register(&tpacpi_hwmon_pdriver);
if (ret) {
pr_err("unable to register hwmon platform driver\n");
thinkpad_acpi_module_exit();
return ret;
}
tp_features.sensors_pdrv_registered = 1;
ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
if (!ret) {
tp_features.platform_drv_attrs_registered = 1;
ret = tpacpi_create_driver_attributes(
&tpacpi_hwmon_pdriver.driver);
}
if (ret) {
pr_err("unable to create sysfs driver attributes\n");
thinkpad_acpi_module_exit();
return ret;
}
tp_features.sensors_pdrv_attrs_registered = 1;
/* Device initialization */
tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
NULL, 0);
if (IS_ERR(tpacpi_pdev)) {
ret = PTR_ERR(tpacpi_pdev);
tpacpi_pdev = NULL;
pr_err("unable to register platform device\n");
thinkpad_acpi_module_exit();
return ret;
}
tpacpi_sensors_pdev = platform_device_register_simple(
TPACPI_HWMON_DRVR_NAME,
-1, NULL, 0);
if (IS_ERR(tpacpi_sensors_pdev)) {
ret = PTR_ERR(tpacpi_sensors_pdev);
tpacpi_sensors_pdev = NULL;
pr_err("unable to register hwmon platform device\n");
thinkpad_acpi_module_exit();
return ret;
}
tp_features.sensors_pdev_attrs_registered = 1;
tpacpi_hwmon = hwmon_device_register_with_groups(
&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
if (IS_ERR(tpacpi_hwmon)) {
ret = PTR_ERR(tpacpi_hwmon);
tpacpi_hwmon = NULL;
pr_err("unable to register hwmon device\n");
thinkpad_acpi_module_exit();
return ret;
}
mutex_init(&tpacpi_inputdev_send_mutex);
tpacpi_inputdev = input_allocate_device();
if (!tpacpi_inputdev) {
thinkpad_acpi_module_exit();
return -ENOMEM;
} else {
/* Prepare input device, but don't register */
tpacpi_inputdev->name = "ThinkPad Extra Buttons";
tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
tpacpi_inputdev->id.bustype = BUS_HOST;
tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
}
/* Init subdriver dependencies */
tpacpi_detect_brightness_capabilities();
/* Init subdrivers */
for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
ret = ibm_init(&ibms_init[i]);
if (ret >= 0 && *ibms_init[i].param)
ret = ibms_init[i].data->write(ibms_init[i].param);
if (ret < 0) {
thinkpad_acpi_module_exit();
return ret;
}
}
tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
ret = input_register_device(tpacpi_inputdev);
if (ret < 0) {
pr_err("unable to register input device\n");
thinkpad_acpi_module_exit();
return ret;
} else {
tp_features.input_device_registered = 1;
}
return 0;
}
MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
/*
* This will autoload the driver in almost every ThinkPad
* in widespread use.
*
* Only _VERY_ old models, like the 240, 240x and 570 lack
* the HKEY event interface.
*/
MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
/*
* DMI matching for module autoloading
*
* See http://thinkwiki.org/wiki/List_of_DMI_IDs
* See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
*
* Only models listed in thinkwiki will be supported, so add yours
* if it is not there yet.
*/
#define IBM_BIOS_MODULE_ALIAS(__type) \
MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
/* Ancient thinkpad BIOSes have to be identified by
* BIOS type or model number, and there are far less
* BIOS types than model numbers... */
IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
MODULE_DESCRIPTION(TPACPI_DESC);
MODULE_VERSION(TPACPI_VERSION);
MODULE_LICENSE("GPL");
module_init(thinkpad_acpi_module_init);
module_exit(thinkpad_acpi_module_exit);