blob: a7effa490a3cc0a5e0b96da13e01da03ab43923f [file] [log] [blame]
/*
* Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com>
* Copyright (c) 2013 Synaptics Incorporated
* Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com>
* Copyright (c) 2014 Red Hat, Inc
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include "hid-ids.h"
#define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */
#define RMI_WRITE_REPORT_ID 0x09 /* Output Report */
#define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */
#define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */
#define RMI_ATTN_REPORT_ID 0x0c /* Input Report */
#define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */
/* flags */
#define RMI_READ_REQUEST_PENDING BIT(0)
#define RMI_READ_DATA_PENDING BIT(1)
#define RMI_STARTED BIT(2)
enum rmi_mode_type {
RMI_MODE_OFF = 0,
RMI_MODE_ATTN_REPORTS = 1,
RMI_MODE_NO_PACKED_ATTN_REPORTS = 2,
};
struct rmi_function {
unsigned page; /* page of the function */
u16 query_base_addr; /* base address for queries */
u16 command_base_addr; /* base address for commands */
u16 control_base_addr; /* base address for controls */
u16 data_base_addr; /* base address for datas */
unsigned int interrupt_base; /* cross-function interrupt number
* (uniq in the device)*/
unsigned int interrupt_count; /* number of interrupts */
unsigned int report_size; /* size of a report */
unsigned long irq_mask; /* mask of the interrupts
* (to be applied against ATTN IRQ) */
};
/**
* struct rmi_data - stores information for hid communication
*
* @page_mutex: Locks current page to avoid changing pages in unexpected ways.
* @page: Keeps track of the current virtual page
*
* @wait: Used for waiting for read data
*
* @writeReport: output buffer when writing RMI registers
* @readReport: input buffer when reading RMI registers
*
* @input_report_size: size of an input report (advertised by HID)
* @output_report_size: size of an output report (advertised by HID)
*
* @flags: flags for the current device (started, reading, etc...)
*
* @f11: placeholder of internal RMI function F11 description
* @f30: placeholder of internal RMI function F30 description
*
* @max_fingers: maximum finger count reported by the device
* @max_x: maximum x value reported by the device
* @max_y: maximum y value reported by the device
*
* @gpio_led_count: count of GPIOs + LEDs reported by F30
* @button_count: actual physical buttons count
* @button_mask: button mask used to decode GPIO ATTN reports
* @button_state_mask: pull state of the buttons
*
* @input: pointer to the kernel input device
*
* @reset_work: worker which will be called in case of a mouse report
* @hdev: pointer to the struct hid_device
*/
struct rmi_data {
struct mutex page_mutex;
int page;
wait_queue_head_t wait;
u8 *writeReport;
u8 *readReport;
int input_report_size;
int output_report_size;
unsigned long flags;
struct rmi_function f11;
struct rmi_function f30;
unsigned int max_fingers;
unsigned int max_x;
unsigned int max_y;
unsigned int x_size_mm;
unsigned int y_size_mm;
unsigned int gpio_led_count;
unsigned int button_count;
unsigned long button_mask;
unsigned long button_state_mask;
struct input_dev *input;
struct work_struct reset_work;
struct hid_device *hdev;
};
#define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
static int rmi_write_report(struct hid_device *hdev, u8 *report, int len);
/**
* rmi_set_page - Set RMI page
* @hdev: The pointer to the hid_device struct
* @page: The new page address.
*
* RMI devices have 16-bit addressing, but some of the physical
* implementations (like SMBus) only have 8-bit addressing. So RMI implements
* a page address at 0xff of every page so we can reliable page addresses
* every 256 registers.
*
* The page_mutex lock must be held when this function is entered.
*
* Returns zero on success, non-zero on failure.
*/
static int rmi_set_page(struct hid_device *hdev, u8 page)
{
struct rmi_data *data = hid_get_drvdata(hdev);
int retval;
data->writeReport[0] = RMI_WRITE_REPORT_ID;
data->writeReport[1] = 1;
data->writeReport[2] = 0xFF;
data->writeReport[4] = page;
retval = rmi_write_report(hdev, data->writeReport,
data->output_report_size);
if (retval != data->output_report_size) {
dev_err(&hdev->dev,
"%s: set page failed: %d.", __func__, retval);
return retval;
}
data->page = page;
return 0;
}
static int rmi_set_mode(struct hid_device *hdev, u8 mode)
{
int ret;
u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, txbuf,
sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
if (ret < 0) {
dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode,
ret);
return ret;
}
return 0;
}
static int rmi_write_report(struct hid_device *hdev, u8 *report, int len)
{
int ret;
ret = hid_hw_output_report(hdev, (void *)report, len);
if (ret < 0) {
dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret);
return ret;
}
return ret;
}
static int rmi_read_block(struct hid_device *hdev, u16 addr, void *buf,
const int len)
{
struct rmi_data *data = hid_get_drvdata(hdev);
int ret;
int bytes_read;
int bytes_needed;
int retries;
int read_input_count;
mutex_lock(&data->page_mutex);
if (RMI_PAGE(addr) != data->page) {
ret = rmi_set_page(hdev, RMI_PAGE(addr));
if (ret < 0)
goto exit;
}
for (retries = 5; retries > 0; retries--) {
data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
data->writeReport[1] = 0; /* old 1 byte read count */
data->writeReport[2] = addr & 0xFF;
data->writeReport[3] = (addr >> 8) & 0xFF;
data->writeReport[4] = len & 0xFF;
data->writeReport[5] = (len >> 8) & 0xFF;
set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
ret = rmi_write_report(hdev, data->writeReport,
data->output_report_size);
if (ret != data->output_report_size) {
clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
dev_err(&hdev->dev,
"failed to write request output report (%d)\n",
ret);
goto exit;
}
bytes_read = 0;
bytes_needed = len;
while (bytes_read < len) {
if (!wait_event_timeout(data->wait,
test_bit(RMI_READ_DATA_PENDING, &data->flags),
msecs_to_jiffies(1000))) {
hid_warn(hdev, "%s: timeout elapsed\n",
__func__);
ret = -EAGAIN;
break;
}
read_input_count = data->readReport[1];
memcpy(buf + bytes_read, &data->readReport[2],
read_input_count < bytes_needed ?
read_input_count : bytes_needed);
bytes_read += read_input_count;
bytes_needed -= read_input_count;
clear_bit(RMI_READ_DATA_PENDING, &data->flags);
}
if (ret >= 0) {
ret = 0;
break;
}
}
exit:
clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
mutex_unlock(&data->page_mutex);
return ret;
}
static inline int rmi_read(struct hid_device *hdev, u16 addr, void *buf)
{
return rmi_read_block(hdev, addr, buf, 1);
}
static void rmi_f11_process_touch(struct rmi_data *hdata, int slot,
u8 finger_state, u8 *touch_data)
{
int x, y, wx, wy;
int wide, major, minor;
int z;
input_mt_slot(hdata->input, slot);
input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER,
finger_state == 0x01);
if (finger_state == 0x01) {
x = (touch_data[0] << 4) | (touch_data[2] & 0x0F);
y = (touch_data[1] << 4) | (touch_data[2] >> 4);
wx = touch_data[3] & 0x0F;
wy = touch_data[3] >> 4;
wide = (wx > wy);
major = max(wx, wy);
minor = min(wx, wy);
z = touch_data[4];
/* y is inverted */
y = hdata->max_y - y;
input_event(hdata->input, EV_ABS, ABS_MT_POSITION_X, x);
input_event(hdata->input, EV_ABS, ABS_MT_POSITION_Y, y);
input_event(hdata->input, EV_ABS, ABS_MT_ORIENTATION, wide);
input_event(hdata->input, EV_ABS, ABS_MT_PRESSURE, z);
input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
}
}
static void rmi_reset_work(struct work_struct *work)
{
struct rmi_data *hdata = container_of(work, struct rmi_data,
reset_work);
/* switch the device to RMI if we receive a generic mouse report */
rmi_set_mode(hdata->hdev, RMI_MODE_ATTN_REPORTS);
}
static inline int rmi_schedule_reset(struct hid_device *hdev)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
return schedule_work(&hdata->reset_work);
}
static int rmi_f11_input_event(struct hid_device *hdev, u8 irq, u8 *data,
int size)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
int offset;
int i;
if (!(irq & hdata->f11.irq_mask) || size <= 0)
return 0;
offset = (hdata->max_fingers >> 2) + 1;
for (i = 0; i < hdata->max_fingers; i++) {
int fs_byte_position = i >> 2;
int fs_bit_position = (i & 0x3) << 1;
int finger_state = (data[fs_byte_position] >> fs_bit_position) &
0x03;
int position = offset + 5 * i;
if (position + 5 > size) {
/* partial report, go on with what we received */
printk_once(KERN_WARNING
"%s %s: Detected incomplete finger report. Finger reports may occasionally get dropped on this platform.\n",
dev_driver_string(&hdev->dev),
dev_name(&hdev->dev));
hid_dbg(hdev, "Incomplete finger report\n");
break;
}
rmi_f11_process_touch(hdata, i, finger_state, &data[position]);
}
input_mt_sync_frame(hdata->input);
input_sync(hdata->input);
return hdata->f11.report_size;
}
static int rmi_f30_input_event(struct hid_device *hdev, u8 irq, u8 *data,
int size)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
int i;
int button = 0;
bool value;
if (!(irq & hdata->f30.irq_mask))
return 0;
if (size < (int)hdata->f30.report_size) {
hid_warn(hdev, "Click Button pressed, but the click data is missing\n");
return 0;
}
for (i = 0; i < hdata->gpio_led_count; i++) {
if (test_bit(i, &hdata->button_mask)) {
value = (data[i / 8] >> (i & 0x07)) & BIT(0);
if (test_bit(i, &hdata->button_state_mask))
value = !value;
input_event(hdata->input, EV_KEY, BTN_LEFT + button++,
value);
}
}
return hdata->f30.report_size;
}
static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
unsigned long irq_mask = 0;
unsigned index = 2;
if (!(test_bit(RMI_STARTED, &hdata->flags)))
return 0;
irq_mask |= hdata->f11.irq_mask;
irq_mask |= hdata->f30.irq_mask;
if (data[1] & ~irq_mask)
hid_dbg(hdev, "unknown intr source:%02lx %s:%d\n",
data[1] & ~irq_mask, __FILE__, __LINE__);
if (hdata->f11.interrupt_base < hdata->f30.interrupt_base) {
index += rmi_f11_input_event(hdev, data[1], &data[index],
size - index);
index += rmi_f30_input_event(hdev, data[1], &data[index],
size - index);
} else {
index += rmi_f30_input_event(hdev, data[1], &data[index],
size - index);
index += rmi_f11_input_event(hdev, data[1], &data[index],
size - index);
}
return 1;
}
static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) {
hid_dbg(hdev, "no read request pending\n");
return 0;
}
memcpy(hdata->readReport, data, size < hdata->input_report_size ?
size : hdata->input_report_size);
set_bit(RMI_READ_DATA_PENDING, &hdata->flags);
wake_up(&hdata->wait);
return 1;
}
static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size)
{
int valid_size = size;
/*
* On the Dell XPS 13 9333, the bus sometimes get confused and fills
* the report with a sentinel value "ff". Synaptics told us that such
* behavior does not comes from the touchpad itself, so we filter out
* such reports here.
*/
while ((data[valid_size - 1] == 0xff) && valid_size > 0)
valid_size--;
return valid_size;
}
static int rmi_raw_event(struct hid_device *hdev,
struct hid_report *report, u8 *data, int size)
{
size = rmi_check_sanity(hdev, data, size);
if (size < 2)
return 0;
switch (data[0]) {
case RMI_READ_DATA_REPORT_ID:
return rmi_read_data_event(hdev, data, size);
case RMI_ATTN_REPORT_ID:
return rmi_input_event(hdev, data, size);
case RMI_MOUSE_REPORT_ID:
rmi_schedule_reset(hdev);
break;
}
return 0;
}
#ifdef CONFIG_PM
static int rmi_post_reset(struct hid_device *hdev)
{
return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
}
static int rmi_post_resume(struct hid_device *hdev)
{
return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
}
#endif /* CONFIG_PM */
#define RMI4_MAX_PAGE 0xff
#define RMI4_PAGE_SIZE 0x0100
#define PDT_START_SCAN_LOCATION 0x00e9
#define PDT_END_SCAN_LOCATION 0x0005
#define RMI4_END_OF_PDT(id) ((id) == 0x00 || (id) == 0xff)
struct pdt_entry {
u8 query_base_addr:8;
u8 command_base_addr:8;
u8 control_base_addr:8;
u8 data_base_addr:8;
u8 interrupt_source_count:3;
u8 bits3and4:2;
u8 function_version:2;
u8 bit7:1;
u8 function_number:8;
} __attribute__((__packed__));
static inline unsigned long rmi_gen_mask(unsigned irq_base, unsigned irq_count)
{
return GENMASK(irq_count + irq_base - 1, irq_base);
}
static void rmi_register_function(struct rmi_data *data,
struct pdt_entry *pdt_entry, int page, unsigned interrupt_count)
{
struct rmi_function *f = NULL;
u16 page_base = page << 8;
switch (pdt_entry->function_number) {
case 0x11:
f = &data->f11;
break;
case 0x30:
f = &data->f30;
break;
}
if (f) {
f->page = page;
f->query_base_addr = page_base | pdt_entry->query_base_addr;
f->command_base_addr = page_base | pdt_entry->command_base_addr;
f->control_base_addr = page_base | pdt_entry->control_base_addr;
f->data_base_addr = page_base | pdt_entry->data_base_addr;
f->interrupt_base = interrupt_count;
f->interrupt_count = pdt_entry->interrupt_source_count;
f->irq_mask = rmi_gen_mask(f->interrupt_base,
f->interrupt_count);
}
}
static int rmi_scan_pdt(struct hid_device *hdev)
{
struct rmi_data *data = hid_get_drvdata(hdev);
struct pdt_entry entry;
int page;
bool page_has_function;
int i;
int retval;
int interrupt = 0;
u16 page_start, pdt_start , pdt_end;
hid_info(hdev, "Scanning PDT...\n");
for (page = 0; (page <= RMI4_MAX_PAGE); page++) {
page_start = RMI4_PAGE_SIZE * page;
pdt_start = page_start + PDT_START_SCAN_LOCATION;
pdt_end = page_start + PDT_END_SCAN_LOCATION;
page_has_function = false;
for (i = pdt_start; i >= pdt_end; i -= sizeof(entry)) {
retval = rmi_read_block(hdev, i, &entry, sizeof(entry));
if (retval) {
hid_err(hdev,
"Read of PDT entry at %#06x failed.\n",
i);
goto error_exit;
}
if (RMI4_END_OF_PDT(entry.function_number))
break;
page_has_function = true;
hid_info(hdev, "Found F%02X on page %#04x\n",
entry.function_number, page);
rmi_register_function(data, &entry, page, interrupt);
interrupt += entry.interrupt_source_count;
}
if (!page_has_function)
break;
}
hid_info(hdev, "%s: Done with PDT scan.\n", __func__);
retval = 0;
error_exit:
return retval;
}
static int rmi_populate_f11(struct hid_device *hdev)
{
struct rmi_data *data = hid_get_drvdata(hdev);
u8 buf[20];
int ret;
bool has_query9;
bool has_query10 = false;
bool has_query11;
bool has_query12;
bool has_physical_props;
bool has_gestures;
bool has_rel;
unsigned x_size, y_size;
u16 query12_offset;
if (!data->f11.query_base_addr) {
hid_err(hdev, "No 2D sensor found, giving up.\n");
return -ENODEV;
}
/* query 0 contains some useful information */
ret = rmi_read(hdev, data->f11.query_base_addr, buf);
if (ret) {
hid_err(hdev, "can not get query 0: %d.\n", ret);
return ret;
}
has_query9 = !!(buf[0] & BIT(3));
has_query11 = !!(buf[0] & BIT(4));
has_query12 = !!(buf[0] & BIT(5));
/* query 1 to get the max number of fingers */
ret = rmi_read(hdev, data->f11.query_base_addr + 1, buf);
if (ret) {
hid_err(hdev, "can not get NumberOfFingers: %d.\n", ret);
return ret;
}
data->max_fingers = (buf[0] & 0x07) + 1;
if (data->max_fingers > 5)
data->max_fingers = 10;
data->f11.report_size = data->max_fingers * 5 +
DIV_ROUND_UP(data->max_fingers, 4);
if (!(buf[0] & BIT(4))) {
hid_err(hdev, "No absolute events, giving up.\n");
return -ENODEV;
}
has_rel = !!(buf[0] & BIT(3));
has_gestures = !!(buf[0] & BIT(5));
if (has_gestures) {
/* query 8 to find out if query 10 exists */
ret = rmi_read(hdev, data->f11.query_base_addr + 8, buf);
if (ret) {
hid_err(hdev, "can not read gesture information: %d.\n",
ret);
return ret;
}
has_query10 = !!(buf[0] & BIT(2));
}
/*
* At least 4 queries are guaranteed to be present in F11
* +1 for query 5 which is present since absolute events are
* reported and +1 for query 12.
*/
query12_offset = 6;
if (has_rel)
++query12_offset; /* query 6 is present */
if (has_gestures)
query12_offset += 2; /* query 7 and 8 are present */
if (has_query9)
++query12_offset;
if (has_query10)
++query12_offset;
if (has_query11)
++query12_offset;
/* query 12 to know if the physical properties are reported */
if (has_query12) {
ret = rmi_read(hdev, data->f11.query_base_addr
+ query12_offset, buf);
if (ret) {
hid_err(hdev, "can not get query 12: %d.\n", ret);
return ret;
}
has_physical_props = !!(buf[0] & BIT(5));
if (has_physical_props) {
ret = rmi_read_block(hdev,
data->f11.query_base_addr
+ query12_offset + 1, buf, 4);
if (ret) {
hid_err(hdev, "can not read query 15-18: %d.\n",
ret);
return ret;
}
x_size = buf[0] | (buf[1] << 8);
y_size = buf[2] | (buf[3] << 8);
data->x_size_mm = DIV_ROUND_CLOSEST(x_size, 10);
data->y_size_mm = DIV_ROUND_CLOSEST(y_size, 10);
hid_info(hdev, "%s: size in mm: %d x %d\n",
__func__, data->x_size_mm, data->y_size_mm);
}
}
/*
* retrieve the ctrl registers
* the ctrl register has a size of 20 but a fw bug split it into 16 + 4,
* and there is no way to know if the first 20 bytes are here or not.
* We use only the first 10 bytes, so get only them.
*/
ret = rmi_read_block(hdev, data->f11.control_base_addr, buf, 10);
if (ret) {
hid_err(hdev, "can not read ctrl block of size 10: %d.\n", ret);
return ret;
}
data->max_x = buf[6] | (buf[7] << 8);
data->max_y = buf[8] | (buf[9] << 8);
return 0;
}
static int rmi_populate_f30(struct hid_device *hdev)
{
struct rmi_data *data = hid_get_drvdata(hdev);
u8 buf[20];
int ret;
bool has_gpio, has_led;
unsigned bytes_per_ctrl;
u8 ctrl2_addr;
int ctrl2_3_length;
int i;
/* function F30 is for physical buttons */
if (!data->f30.query_base_addr) {
hid_err(hdev, "No GPIO/LEDs found, giving up.\n");
return -ENODEV;
}
ret = rmi_read_block(hdev, data->f30.query_base_addr, buf, 2);
if (ret) {
hid_err(hdev, "can not get F30 query registers: %d.\n", ret);
return ret;
}
has_gpio = !!(buf[0] & BIT(3));
has_led = !!(buf[0] & BIT(2));
data->gpio_led_count = buf[1] & 0x1f;
/* retrieve ctrl 2 & 3 registers */
bytes_per_ctrl = (data->gpio_led_count + 7) / 8;
/* Ctrl0 is present only if both has_gpio and has_led are set*/
ctrl2_addr = (has_gpio && has_led) ? bytes_per_ctrl : 0;
/* Ctrl1 is always be present */
ctrl2_addr += bytes_per_ctrl;
ctrl2_3_length = 2 * bytes_per_ctrl;
data->f30.report_size = bytes_per_ctrl;
ret = rmi_read_block(hdev, data->f30.control_base_addr + ctrl2_addr,
buf, ctrl2_3_length);
if (ret) {
hid_err(hdev, "can not read ctrl 2&3 block of size %d: %d.\n",
ctrl2_3_length, ret);
return ret;
}
for (i = 0; i < data->gpio_led_count; i++) {
int byte_position = i >> 3;
int bit_position = i & 0x07;
u8 dir_byte = buf[byte_position];
u8 data_byte = buf[byte_position + bytes_per_ctrl];
bool dir = (dir_byte >> bit_position) & BIT(0);
bool dat = (data_byte >> bit_position) & BIT(0);
if (dir == 0) {
/* input mode */
if (dat) {
/* actual buttons have pull up resistor */
data->button_count++;
set_bit(i, &data->button_mask);
set_bit(i, &data->button_state_mask);
}
}
}
return 0;
}
static int rmi_populate(struct hid_device *hdev)
{
int ret;
ret = rmi_scan_pdt(hdev);
if (ret) {
hid_err(hdev, "PDT scan failed with code %d.\n", ret);
return ret;
}
ret = rmi_populate_f11(hdev);
if (ret) {
hid_err(hdev, "Error while initializing F11 (%d).\n", ret);
return ret;
}
ret = rmi_populate_f30(hdev);
if (ret)
hid_warn(hdev, "Error while initializing F30 (%d).\n", ret);
return 0;
}
static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
struct rmi_data *data = hid_get_drvdata(hdev);
struct input_dev *input = hi->input;
int ret;
int res_x, res_y, i;
data->input = input;
hid_dbg(hdev, "Opening low level driver\n");
ret = hid_hw_open(hdev);
if (ret)
return ret;
/* Allow incoming hid reports */
hid_device_io_start(hdev);
ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
if (ret < 0) {
dev_err(&hdev->dev, "failed to set rmi mode\n");
goto exit;
}
ret = rmi_set_page(hdev, 0);
if (ret < 0) {
dev_err(&hdev->dev, "failed to set page select to 0.\n");
goto exit;
}
ret = rmi_populate(hdev);
if (ret)
goto exit;
__set_bit(EV_ABS, input->evbit);
input_set_abs_params(input, ABS_MT_POSITION_X, 1, data->max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 1, data->max_y, 0, 0);
if (data->x_size_mm && data->y_size_mm) {
res_x = (data->max_x - 1) / data->x_size_mm;
res_y = (data->max_y - 1) / data->y_size_mm;
input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
}
input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
ret = input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
if (ret < 0)
goto exit;
if (data->button_count) {
__set_bit(EV_KEY, input->evbit);
for (i = 0; i < data->button_count; i++)
__set_bit(BTN_LEFT + i, input->keybit);
if (data->button_count == 1)
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
}
set_bit(RMI_STARTED, &data->flags);
exit:
hid_device_io_stop(hdev);
hid_hw_close(hdev);
return ret;
}
static int rmi_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max)
{
/* we want to make HID ignore the advertised HID collection */
return -1;
}
static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct rmi_data *data = NULL;
int ret;
size_t alloc_size;
struct hid_report *input_report;
struct hid_report *output_report;
data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
INIT_WORK(&data->reset_work, rmi_reset_work);
data->hdev = hdev;
hid_set_drvdata(hdev, data);
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
return ret;
}
input_report = hdev->report_enum[HID_INPUT_REPORT]
.report_id_hash[RMI_ATTN_REPORT_ID];
if (!input_report) {
hid_err(hdev, "device does not have expected input report\n");
ret = -ENODEV;
return ret;
}
data->input_report_size = (input_report->size >> 3) + 1 /* report id */;
output_report = hdev->report_enum[HID_OUTPUT_REPORT]
.report_id_hash[RMI_WRITE_REPORT_ID];
if (!output_report) {
hid_err(hdev, "device does not have expected output report\n");
ret = -ENODEV;
return ret;
}
data->output_report_size = (output_report->size >> 3)
+ 1 /* report id */;
alloc_size = data->output_report_size + data->input_report_size;
data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL);
if (!data->writeReport) {
ret = -ENOMEM;
return ret;
}
data->readReport = data->writeReport + data->output_report_size;
init_waitqueue_head(&data->wait);
mutex_init(&data->page_mutex);
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
return ret;
}
if (!test_bit(RMI_STARTED, &data->flags))
/*
* The device maybe in the bootloader if rmi_input_configured
* failed to find F11 in the PDT. Print an error, but don't
* return an error from rmi_probe so that hidraw will be
* accessible from userspace. That way a userspace tool
* can be used to reload working firmware on the touchpad.
*/
hid_err(hdev, "Device failed to be properly configured\n");
return 0;
}
static void rmi_remove(struct hid_device *hdev)
{
struct rmi_data *hdata = hid_get_drvdata(hdev);
clear_bit(RMI_STARTED, &hdata->flags);
hid_hw_stop(hdev);
}
static const struct hid_device_id rmi_id[] = {
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
{ }
};
MODULE_DEVICE_TABLE(hid, rmi_id);
static struct hid_driver rmi_driver = {
.name = "hid-rmi",
.id_table = rmi_id,
.probe = rmi_probe,
.remove = rmi_remove,
.raw_event = rmi_raw_event,
.input_mapping = rmi_input_mapping,
.input_configured = rmi_input_configured,
#ifdef CONFIG_PM
.resume = rmi_post_resume,
.reset_resume = rmi_post_reset,
#endif
};
module_hid_driver(rmi_driver);
MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>");
MODULE_DESCRIPTION("RMI HID driver");
MODULE_LICENSE("GPL");