| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Dell WMI hotkeys |
| * |
| * Copyright (C) 2008 Red Hat <mjg@redhat.com> |
| * Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org> |
| * |
| * Portions based on wistron_btns.c: |
| * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> |
| * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> |
| * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| #include <linux/input.h> |
| #include <linux/input/sparse-keymap.h> |
| #include <linux/acpi.h> |
| #include <linux/string.h> |
| #include <linux/dmi.h> |
| #include <linux/wmi.h> |
| #include <acpi/video.h> |
| #include "dell-smbios.h" |
| #include "dell-wmi-descriptor.h" |
| #include "dell-wmi-privacy.h" |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); |
| MODULE_AUTHOR("Pali Rohár <pali@kernel.org>"); |
| MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver"); |
| MODULE_LICENSE("GPL"); |
| |
| #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492" |
| |
| static bool wmi_requires_smbios_request; |
| |
| struct dell_wmi_priv { |
| struct input_dev *input_dev; |
| u32 interface_version; |
| }; |
| |
| static int __init dmi_matched(const struct dmi_system_id *dmi) |
| { |
| wmi_requires_smbios_request = 1; |
| return 1; |
| } |
| |
| static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = { |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron M5110", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"), |
| }, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro V131", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), |
| }, |
| }, |
| { } |
| }; |
| |
| /* |
| * Keymap for WMI events of type 0x0000 |
| * |
| * Certain keys are flagged as KE_IGNORE. All of these are either |
| * notifications (rather than requests for change) or are also sent |
| * via the keyboard controller so should not be sent again. |
| */ |
| static const struct key_entry dell_wmi_keymap_type_0000[] = { |
| { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } }, |
| |
| /* Key code is followed by brightness level */ |
| { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } }, |
| { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } }, |
| |
| /* Battery health status button */ |
| { KE_KEY, 0xe007, { KEY_BATTERY } }, |
| |
| /* Radio devices state change, key code is followed by other values */ |
| { KE_IGNORE, 0xe008, { KEY_RFKILL } }, |
| |
| { KE_KEY, 0xe009, { KEY_EJECTCD } }, |
| |
| /* Key code is followed by: next, active and attached devices */ |
| { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } }, |
| |
| /* Key code is followed by keyboard illumination level */ |
| { KE_IGNORE, 0xe00c, { KEY_KBDILLUMTOGGLE } }, |
| |
| /* BIOS error detected */ |
| { KE_IGNORE, 0xe00d, { KEY_RESERVED } }, |
| |
| /* Battery was removed or inserted */ |
| { KE_IGNORE, 0xe00e, { KEY_RESERVED } }, |
| |
| /* Wifi Catcher */ |
| { KE_KEY, 0xe011, { KEY_WLAN } }, |
| |
| /* Ambient light sensor toggle */ |
| { KE_IGNORE, 0xe013, { KEY_RESERVED } }, |
| |
| { KE_IGNORE, 0xe020, { KEY_MUTE } }, |
| |
| /* Unknown, defined in ACPI DSDT */ |
| /* { KE_IGNORE, 0xe023, { KEY_RESERVED } }, */ |
| |
| /* Untested, Dell Instant Launch key on Inspiron 7520 */ |
| /* { KE_IGNORE, 0xe024, { KEY_RESERVED } }, */ |
| |
| /* Dell Instant Launch key */ |
| { KE_KEY, 0xe025, { KEY_PROG4 } }, |
| |
| /* Audio panel key */ |
| { KE_IGNORE, 0xe026, { KEY_RESERVED } }, |
| |
| /* LCD Display On/Off Control key */ |
| { KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } }, |
| |
| /* Untested, Multimedia key on Dell Vostro 3560 */ |
| /* { KE_IGNORE, 0xe028, { KEY_RESERVED } }, */ |
| |
| /* Dell Instant Launch key */ |
| { KE_KEY, 0xe029, { KEY_PROG4 } }, |
| |
| /* Untested, Windows Mobility Center button on Inspiron 7520 */ |
| /* { KE_IGNORE, 0xe02a, { KEY_RESERVED } }, */ |
| |
| /* Unknown, defined in ACPI DSDT */ |
| /* { KE_IGNORE, 0xe02b, { KEY_RESERVED } }, */ |
| |
| /* Untested, Dell Audio With Preset Switch button on Inspiron 7520 */ |
| /* { KE_IGNORE, 0xe02c, { KEY_RESERVED } }, */ |
| |
| { KE_IGNORE, 0xe02e, { KEY_VOLUMEDOWN } }, |
| { KE_IGNORE, 0xe030, { KEY_VOLUMEUP } }, |
| { KE_IGNORE, 0xe033, { KEY_KBDILLUMUP } }, |
| { KE_IGNORE, 0xe034, { KEY_KBDILLUMDOWN } }, |
| { KE_IGNORE, 0xe03a, { KEY_CAPSLOCK } }, |
| |
| /* NIC Link is Up */ |
| { KE_IGNORE, 0xe043, { KEY_RESERVED } }, |
| |
| /* NIC Link is Down */ |
| { KE_IGNORE, 0xe044, { KEY_RESERVED } }, |
| |
| /* |
| * This entry is very suspicious! |
| * Originally Matthew Garrett created this dell-wmi driver specially for |
| * "button with a picture of a battery" which has event code 0xe045. |
| * Later Mario Limonciello from Dell told us that event code 0xe045 is |
| * reported by Num Lock and should be ignored because key is send also |
| * by keyboard controller. |
| * So for now we will ignore this event to prevent potential double |
| * Num Lock key press. |
| */ |
| { KE_IGNORE, 0xe045, { KEY_NUMLOCK } }, |
| |
| /* Scroll lock and also going to tablet mode on portable devices */ |
| { KE_IGNORE, 0xe046, { KEY_SCROLLLOCK } }, |
| |
| /* Untested, going from tablet mode on portable devices */ |
| /* { KE_IGNORE, 0xe047, { KEY_RESERVED } }, */ |
| |
| /* Dell Support Center key */ |
| { KE_IGNORE, 0xe06e, { KEY_RESERVED } }, |
| |
| { KE_IGNORE, 0xe0f7, { KEY_MUTE } }, |
| { KE_IGNORE, 0xe0f8, { KEY_VOLUMEDOWN } }, |
| { KE_IGNORE, 0xe0f9, { KEY_VOLUMEUP } }, |
| }; |
| |
| struct dell_bios_keymap_entry { |
| u16 scancode; |
| u16 keycode; |
| }; |
| |
| struct dell_bios_hotkey_table { |
| struct dmi_header header; |
| struct dell_bios_keymap_entry keymap[]; |
| |
| }; |
| |
| struct dell_dmi_results { |
| int err; |
| int keymap_size; |
| struct key_entry *keymap; |
| }; |
| |
| /* Uninitialized entries here are KEY_RESERVED == 0. */ |
| static const u16 bios_to_linux_keycode[256] = { |
| [0] = KEY_MEDIA, |
| [1] = KEY_NEXTSONG, |
| [2] = KEY_PLAYPAUSE, |
| [3] = KEY_PREVIOUSSONG, |
| [4] = KEY_STOPCD, |
| [5] = KEY_UNKNOWN, |
| [6] = KEY_UNKNOWN, |
| [7] = KEY_UNKNOWN, |
| [8] = KEY_WWW, |
| [9] = KEY_UNKNOWN, |
| [10] = KEY_VOLUMEDOWN, |
| [11] = KEY_MUTE, |
| [12] = KEY_VOLUMEUP, |
| [13] = KEY_UNKNOWN, |
| [14] = KEY_BATTERY, |
| [15] = KEY_EJECTCD, |
| [16] = KEY_UNKNOWN, |
| [17] = KEY_SLEEP, |
| [18] = KEY_PROG1, |
| [19] = KEY_BRIGHTNESSDOWN, |
| [20] = KEY_BRIGHTNESSUP, |
| [21] = KEY_BRIGHTNESS_AUTO, |
| [22] = KEY_KBDILLUMTOGGLE, |
| [23] = KEY_UNKNOWN, |
| [24] = KEY_SWITCHVIDEOMODE, |
| [25] = KEY_UNKNOWN, |
| [26] = KEY_UNKNOWN, |
| [27] = KEY_SWITCHVIDEOMODE, |
| [28] = KEY_UNKNOWN, |
| [29] = KEY_UNKNOWN, |
| [30] = KEY_PROG2, |
| [31] = KEY_UNKNOWN, |
| [32] = KEY_UNKNOWN, |
| [33] = KEY_UNKNOWN, |
| [34] = KEY_UNKNOWN, |
| [35] = KEY_UNKNOWN, |
| [36] = KEY_UNKNOWN, |
| [37] = KEY_UNKNOWN, |
| [38] = KEY_MICMUTE, |
| [255] = KEY_PROG3, |
| }; |
| |
| /* |
| * Keymap for WMI events of type 0x0010 |
| * |
| * These are applied if the 0xB2 DMI hotkey table is present and doesn't |
| * override them. |
| */ |
| static const struct key_entry dell_wmi_keymap_type_0010[] = { |
| /* Fn-lock switched to function keys */ |
| { KE_IGNORE, 0x0, { KEY_RESERVED } }, |
| |
| /* Fn-lock switched to multimedia keys */ |
| { KE_IGNORE, 0x1, { KEY_RESERVED } }, |
| |
| /* Keyboard backlight change notification */ |
| { KE_IGNORE, 0x3f, { KEY_RESERVED } }, |
| |
| /* Backlight brightness level */ |
| { KE_KEY, 0x57, { KEY_BRIGHTNESSDOWN } }, |
| { KE_KEY, 0x58, { KEY_BRIGHTNESSUP } }, |
| |
| /*Speaker Mute*/ |
| { KE_KEY, 0x109, { KEY_MUTE} }, |
| |
| /* Mic mute */ |
| { KE_KEY, 0x150, { KEY_MICMUTE } }, |
| |
| /* Fn-lock */ |
| { KE_IGNORE, 0x151, { KEY_RESERVED } }, |
| |
| /* Change keyboard illumination */ |
| { KE_IGNORE, 0x152, { KEY_KBDILLUMTOGGLE } }, |
| |
| /* |
| * Radio disable (notify only -- there is no model for which the |
| * WMI event is supposed to trigger an action). |
| */ |
| { KE_IGNORE, 0x153, { KEY_RFKILL } }, |
| |
| /* RGB keyboard backlight control */ |
| { KE_IGNORE, 0x154, { KEY_RESERVED } }, |
| |
| /* |
| * Stealth mode toggle. This will "disable all lights and sounds". |
| * The action is performed by the BIOS and EC; the WMI event is just |
| * a notification. On the XPS 13 9350, this is Fn+F7, and there's |
| * a BIOS setting to enable and disable the hotkey. |
| */ |
| { KE_IGNORE, 0x155, { KEY_RESERVED } }, |
| |
| /* Rugged magnetic dock attach/detach events */ |
| { KE_IGNORE, 0x156, { KEY_RESERVED } }, |
| { KE_IGNORE, 0x157, { KEY_RESERVED } }, |
| |
| /* Rugged programmable (P1/P2/P3 keys) */ |
| { KE_KEY, 0x850, { KEY_PROG1 } }, |
| { KE_KEY, 0x851, { KEY_PROG2 } }, |
| { KE_KEY, 0x852, { KEY_PROG3 } }, |
| |
| /* |
| * Radio disable (notify only -- there is no model for which the |
| * WMI event is supposed to trigger an action). |
| */ |
| { KE_IGNORE, 0xe008, { KEY_RFKILL } }, |
| |
| /* Fn-lock */ |
| { KE_IGNORE, 0xe035, { KEY_RESERVED } }, |
| }; |
| |
| /* |
| * Keymap for WMI events of type 0x0011 |
| */ |
| static const struct key_entry dell_wmi_keymap_type_0011[] = { |
| /* Battery unplugged */ |
| { KE_IGNORE, 0xfff0, { KEY_RESERVED } }, |
| |
| /* Battery inserted */ |
| { KE_IGNORE, 0xfff1, { KEY_RESERVED } }, |
| |
| /* |
| * Detachable keyboard detached / undocked |
| * Note SW_TABLET_MODE is already reported through the intel_vbtn |
| * driver for this, so we ignore it. |
| */ |
| { KE_IGNORE, 0xfff2, { KEY_RESERVED } }, |
| |
| /* Detachable keyboard attached / docked */ |
| { KE_IGNORE, 0xfff3, { KEY_RESERVED } }, |
| |
| /* Keyboard backlight level changed */ |
| { KE_IGNORE, KBD_LED_OFF_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_ON_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_AUTO_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_AUTO_25_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_AUTO_50_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_AUTO_75_TOKEN, { KEY_RESERVED } }, |
| { KE_IGNORE, KBD_LED_AUTO_100_TOKEN, { KEY_RESERVED } }, |
| }; |
| |
| /* |
| * Keymap for WMI events of type 0x0012 |
| * They are events with extended data |
| */ |
| static const struct key_entry dell_wmi_keymap_type_0012[] = { |
| /* Fn-lock button pressed */ |
| { KE_IGNORE, 0xe035, { KEY_RESERVED } }, |
| }; |
| |
| static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code) |
| { |
| struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); |
| const struct key_entry *key; |
| |
| key = sparse_keymap_entry_from_scancode(priv->input_dev, |
| (type << 16) | code); |
| if (!key) { |
| pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n", |
| type, code); |
| return; |
| } |
| |
| pr_debug("Key with type 0x%04x and code 0x%04x pressed\n", type, code); |
| |
| /* Don't report brightness notifications that will also come via ACPI */ |
| if ((key->keycode == KEY_BRIGHTNESSUP || |
| key->keycode == KEY_BRIGHTNESSDOWN) && |
| acpi_video_handles_brightness_key_presses()) |
| return; |
| |
| if (type == 0x0000 && code == 0xe025 && !wmi_requires_smbios_request) |
| return; |
| |
| if (key->keycode == KEY_KBDILLUMTOGGLE) |
| dell_laptop_call_notifier( |
| DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL); |
| |
| sparse_keymap_report_entry(priv->input_dev, key, 1, true); |
| } |
| |
| static void dell_wmi_notify(struct wmi_device *wdev, |
| union acpi_object *obj) |
| { |
| struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); |
| u16 *buffer_entry, *buffer_end; |
| acpi_size buffer_size; |
| int len, i; |
| |
| if (obj->type != ACPI_TYPE_BUFFER) { |
| pr_warn("bad response type %x\n", obj->type); |
| return; |
| } |
| |
| pr_debug("Received WMI event (%*ph)\n", |
| obj->buffer.length, obj->buffer.pointer); |
| |
| buffer_entry = (u16 *)obj->buffer.pointer; |
| buffer_size = obj->buffer.length/2; |
| buffer_end = buffer_entry + buffer_size; |
| |
| /* |
| * BIOS/ACPI on devices with WMI interface version 0 does not clear |
| * buffer before filling it. So next time when BIOS/ACPI send WMI event |
| * which is smaller as previous then it contains garbage in buffer from |
| * previous event. |
| * |
| * BIOS/ACPI on devices with WMI interface version 1 clears buffer and |
| * sometimes send more events in buffer at one call. |
| * |
| * So to prevent reading garbage from buffer we will process only first |
| * one event on devices with WMI interface version 0. |
| */ |
| if (priv->interface_version == 0 && buffer_entry < buffer_end) |
| if (buffer_end > buffer_entry + buffer_entry[0] + 1) |
| buffer_end = buffer_entry + buffer_entry[0] + 1; |
| |
| while (buffer_entry < buffer_end) { |
| |
| len = buffer_entry[0]; |
| if (len == 0) |
| break; |
| |
| len++; |
| |
| if (buffer_entry + len > buffer_end) { |
| pr_warn("Invalid length of WMI event\n"); |
| break; |
| } |
| |
| pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry); |
| |
| switch (buffer_entry[1]) { |
| case 0x0000: /* One key pressed or event occurred */ |
| if (len > 2) |
| dell_wmi_process_key(wdev, buffer_entry[1], |
| buffer_entry[2]); |
| /* Extended data is currently ignored */ |
| break; |
| case 0x0010: /* Sequence of keys pressed */ |
| case 0x0011: /* Sequence of events occurred */ |
| for (i = 2; i < len; ++i) |
| dell_wmi_process_key(wdev, buffer_entry[1], |
| buffer_entry[i]); |
| break; |
| case 0x0012: |
| if ((len > 4) && dell_privacy_process_event(buffer_entry[1], buffer_entry[3], |
| buffer_entry[4])) |
| /* dell_privacy_process_event has handled the event */; |
| else if (len > 2) |
| dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); |
| break; |
| default: /* Unknown event */ |
| pr_info("Unknown WMI event type 0x%x\n", |
| (int)buffer_entry[1]); |
| break; |
| } |
| |
| buffer_entry += len; |
| |
| } |
| |
| } |
| |
| static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len) |
| { |
| int i; |
| |
| for (i = 0; i < len; i++) |
| if (keymap[i].code == scancode) |
| return true; |
| |
| return false; |
| } |
| |
| static void handle_dmi_entry(const struct dmi_header *dm, void *opaque) |
| { |
| struct dell_dmi_results *results = opaque; |
| struct dell_bios_hotkey_table *table; |
| int hotkey_num, i, pos = 0; |
| struct key_entry *keymap; |
| |
| if (results->err || results->keymap) |
| return; /* We already found the hotkey table. */ |
| |
| /* The Dell hotkey table is type 0xB2. Scan until we find it. */ |
| if (dm->type != 0xb2) |
| return; |
| |
| table = container_of(dm, struct dell_bios_hotkey_table, header); |
| |
| hotkey_num = (table->header.length - |
| sizeof(struct dell_bios_hotkey_table)) / |
| sizeof(struct dell_bios_keymap_entry); |
| if (hotkey_num < 1) { |
| /* |
| * Historically, dell-wmi would ignore a DMI entry of |
| * fewer than 7 bytes. Sizes between 4 and 8 bytes are |
| * nonsensical (both the header and all entries are 4 |
| * bytes), so we approximate the old behavior by |
| * ignoring tables with fewer than one entry. |
| */ |
| return; |
| } |
| |
| keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL); |
| if (!keymap) { |
| results->err = -ENOMEM; |
| return; |
| } |
| |
| for (i = 0; i < hotkey_num; i++) { |
| const struct dell_bios_keymap_entry *bios_entry = |
| &table->keymap[i]; |
| |
| /* Uninitialized entries are 0 aka KEY_RESERVED. */ |
| u16 keycode = (bios_entry->keycode < |
| ARRAY_SIZE(bios_to_linux_keycode)) ? |
| bios_to_linux_keycode[bios_entry->keycode] : |
| (bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED); |
| |
| /* |
| * Log if we find an entry in the DMI table that we don't |
| * understand. If this happens, we should figure out what |
| * the entry means and add it to bios_to_linux_keycode. |
| */ |
| if (keycode == KEY_RESERVED) { |
| pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n", |
| bios_entry->scancode, bios_entry->keycode); |
| continue; |
| } |
| |
| if (keycode == KEY_KBDILLUMTOGGLE) |
| keymap[pos].type = KE_IGNORE; |
| else |
| keymap[pos].type = KE_KEY; |
| keymap[pos].code = bios_entry->scancode; |
| keymap[pos].keycode = keycode; |
| |
| pos++; |
| } |
| |
| results->keymap = keymap; |
| results->keymap_size = pos; |
| } |
| |
| static int dell_wmi_input_setup(struct wmi_device *wdev) |
| { |
| struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); |
| struct dell_dmi_results dmi_results = {}; |
| struct key_entry *keymap; |
| int err, i, pos = 0; |
| |
| priv->input_dev = input_allocate_device(); |
| if (!priv->input_dev) |
| return -ENOMEM; |
| |
| priv->input_dev->name = "Dell WMI hotkeys"; |
| priv->input_dev->id.bustype = BUS_HOST; |
| priv->input_dev->dev.parent = &wdev->dev; |
| |
| if (dmi_walk(handle_dmi_entry, &dmi_results)) { |
| /* |
| * Historically, dell-wmi ignored dmi_walk errors. A failure |
| * is certainly surprising, but it probably just indicates |
| * a very old laptop. |
| */ |
| pr_warn("no DMI; using the old-style hotkey interface\n"); |
| } |
| |
| if (dmi_results.err) { |
| err = dmi_results.err; |
| goto err_free_dev; |
| } |
| |
| keymap = kcalloc(dmi_results.keymap_size + |
| ARRAY_SIZE(dell_wmi_keymap_type_0000) + |
| ARRAY_SIZE(dell_wmi_keymap_type_0010) + |
| ARRAY_SIZE(dell_wmi_keymap_type_0011) + |
| ARRAY_SIZE(dell_wmi_keymap_type_0012) + |
| 1, |
| sizeof(struct key_entry), GFP_KERNEL); |
| if (!keymap) { |
| kfree(dmi_results.keymap); |
| err = -ENOMEM; |
| goto err_free_dev; |
| } |
| |
| /* Append table with events of type 0x0010 which comes from DMI */ |
| for (i = 0; i < dmi_results.keymap_size; i++) { |
| keymap[pos] = dmi_results.keymap[i]; |
| keymap[pos].code |= (0x0010 << 16); |
| pos++; |
| } |
| |
| kfree(dmi_results.keymap); |
| |
| /* Append table with extra events of type 0x0010 which are not in DMI */ |
| for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0010); i++) { |
| const struct key_entry *entry = &dell_wmi_keymap_type_0010[i]; |
| |
| /* |
| * Check if we've already found this scancode. This takes |
| * quadratic time, but it doesn't matter unless the list |
| * of extra keys gets very long. |
| */ |
| if (dmi_results.keymap_size && |
| have_scancode(entry->code | (0x0010 << 16), |
| keymap, dmi_results.keymap_size) |
| ) |
| continue; |
| |
| keymap[pos] = *entry; |
| keymap[pos].code |= (0x0010 << 16); |
| pos++; |
| } |
| |
| /* Append table with events of type 0x0011 */ |
| for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0011); i++) { |
| keymap[pos] = dell_wmi_keymap_type_0011[i]; |
| keymap[pos].code |= (0x0011 << 16); |
| pos++; |
| } |
| |
| /* Append table with events of type 0x0012 */ |
| for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) { |
| keymap[pos] = dell_wmi_keymap_type_0012[i]; |
| keymap[pos].code |= (0x0012 << 16); |
| pos++; |
| } |
| |
| /* |
| * Now append also table with "legacy" events of type 0x0000. Some of |
| * them are reported also on laptops which have scancodes in DMI. |
| */ |
| for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0000); i++) { |
| keymap[pos] = dell_wmi_keymap_type_0000[i]; |
| pos++; |
| } |
| |
| keymap[pos].type = KE_END; |
| |
| err = sparse_keymap_setup(priv->input_dev, keymap, NULL); |
| /* |
| * Sparse keymap library makes a copy of keymap so we don't need the |
| * original one that was allocated. |
| */ |
| kfree(keymap); |
| if (err) |
| goto err_free_dev; |
| |
| err = input_register_device(priv->input_dev); |
| if (err) |
| goto err_free_dev; |
| |
| return 0; |
| |
| err_free_dev: |
| input_free_device(priv->input_dev); |
| return err; |
| } |
| |
| static void dell_wmi_input_destroy(struct wmi_device *wdev) |
| { |
| struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); |
| |
| input_unregister_device(priv->input_dev); |
| } |
| |
| /* |
| * According to Dell SMBIOS documentation: |
| * |
| * 17 3 Application Program Registration |
| * |
| * cbArg1 Application ID 1 = 0x00010000 |
| * cbArg2 Application ID 2 |
| * QUICKSET/DCP = 0x51534554 "QSET" |
| * ALS Driver = 0x416c7353 "AlsS" |
| * Latitude ON = 0x4c6f6e52 "LonR" |
| * cbArg3 Application version or revision number |
| * cbArg4 0 = Unregister application |
| * 1 = Register application |
| * cbRes1 Standard return codes (0, -1, -2) |
| */ |
| |
| static int dell_wmi_events_set_enabled(bool enable) |
| { |
| struct calling_interface_buffer *buffer; |
| int ret; |
| |
| buffer = kzalloc(sizeof(struct calling_interface_buffer), GFP_KERNEL); |
| if (!buffer) |
| return -ENOMEM; |
| buffer->cmd_class = CLASS_INFO; |
| buffer->cmd_select = SELECT_APP_REGISTRATION; |
| buffer->input[0] = 0x10000; |
| buffer->input[1] = 0x51534554; |
| buffer->input[3] = enable; |
| ret = dell_smbios_call(buffer); |
| if (ret == 0) |
| ret = buffer->output[0]; |
| kfree(buffer); |
| |
| return dell_smbios_error(ret); |
| } |
| |
| static int dell_wmi_probe(struct wmi_device *wdev, const void *context) |
| { |
| struct dell_wmi_priv *priv; |
| int ret; |
| |
| ret = dell_wmi_get_descriptor_valid(); |
| if (ret) |
| return ret; |
| |
| priv = devm_kzalloc( |
| &wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| dev_set_drvdata(&wdev->dev, priv); |
| |
| if (!dell_wmi_get_interface_version(&priv->interface_version)) |
| return -EPROBE_DEFER; |
| |
| return dell_wmi_input_setup(wdev); |
| } |
| |
| static void dell_wmi_remove(struct wmi_device *wdev) |
| { |
| dell_wmi_input_destroy(wdev); |
| } |
| static const struct wmi_device_id dell_wmi_id_table[] = { |
| { .guid_string = DELL_EVENT_GUID }, |
| { }, |
| }; |
| |
| static struct wmi_driver dell_wmi_driver = { |
| .driver = { |
| .name = "dell-wmi", |
| }, |
| .id_table = dell_wmi_id_table, |
| .probe = dell_wmi_probe, |
| .remove = dell_wmi_remove, |
| .notify = dell_wmi_notify, |
| }; |
| |
| static int __init dell_wmi_init(void) |
| { |
| int err; |
| |
| dmi_check_system(dell_wmi_smbios_list); |
| |
| if (wmi_requires_smbios_request) { |
| err = dell_wmi_events_set_enabled(true); |
| if (err) { |
| pr_err("Failed to enable WMI events\n"); |
| return err; |
| } |
| } |
| |
| err = dell_privacy_register_driver(); |
| if (err) |
| return err; |
| |
| return wmi_driver_register(&dell_wmi_driver); |
| } |
| late_initcall(dell_wmi_init); |
| |
| static void __exit dell_wmi_exit(void) |
| { |
| if (wmi_requires_smbios_request) |
| dell_wmi_events_set_enabled(false); |
| |
| wmi_driver_unregister(&dell_wmi_driver); |
| dell_privacy_unregister_driver(); |
| } |
| module_exit(dell_wmi_exit); |
| |
| MODULE_DEVICE_TABLE(wmi, dell_wmi_id_table); |