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![Ayman Bagabas](/assets/img/avatar_default.png)
battery_lock mutex is never used and not needed.
Fixes: 355a070b09
("platform/x86: huawei-wmi: Add battery charging thresholds")
Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
899 lines
20 KiB
C
899 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Huawei WMI laptop extras driver
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*
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* Copyright (C) 2018 Ayman Bagabas <ayman.bagabas@gmail.com>
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*/
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#include <linux/acpi.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/dmi.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/sysfs.h>
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#include <linux/wmi.h>
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#include <acpi/battery.h>
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/*
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* Huawei WMI GUIDs
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*/
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#define HWMI_METHOD_GUID "ABBC0F5B-8EA1-11D1-A000-C90629100000"
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#define HWMI_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000"
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/* Legacy GUIDs */
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#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100"
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#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100"
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/* HWMI commands */
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enum {
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BATTERY_THRESH_GET = 0x00001103, /* \GBTT */
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BATTERY_THRESH_SET = 0x00001003, /* \SBTT */
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FN_LOCK_GET = 0x00000604, /* \GFRS */
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FN_LOCK_SET = 0x00000704, /* \SFRS */
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MICMUTE_LED_SET = 0x00000b04, /* \SMLS */
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};
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union hwmi_arg {
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u64 cmd;
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u8 args[8];
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};
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struct quirk_entry {
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bool battery_reset;
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bool ec_micmute;
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bool report_brightness;
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};
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static struct quirk_entry *quirks;
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struct huawei_wmi_debug {
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struct dentry *root;
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u64 arg;
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};
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struct huawei_wmi {
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bool battery_available;
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bool fn_lock_available;
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struct huawei_wmi_debug debug;
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struct input_dev *idev[2];
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struct led_classdev cdev;
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struct device *dev;
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struct mutex wmi_lock;
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};
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static struct huawei_wmi *huawei_wmi;
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static const struct key_entry huawei_wmi_keymap[] = {
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{ KE_KEY, 0x281, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 0x282, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 0x284, { KEY_MUTE } },
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{ KE_KEY, 0x285, { KEY_VOLUMEDOWN } },
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{ KE_KEY, 0x286, { KEY_VOLUMEUP } },
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{ KE_KEY, 0x287, { KEY_MICMUTE } },
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{ KE_KEY, 0x289, { KEY_WLAN } },
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// Huawei |M| key
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{ KE_KEY, 0x28a, { KEY_CONFIG } },
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// Keyboard backlit
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{ KE_IGNORE, 0x293, { KEY_KBDILLUMTOGGLE } },
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{ KE_IGNORE, 0x294, { KEY_KBDILLUMUP } },
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{ KE_IGNORE, 0x295, { KEY_KBDILLUMUP } },
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{ KE_END, 0 }
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};
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static int battery_reset = -1;
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static int report_brightness = -1;
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module_param(battery_reset, bint, 0444);
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MODULE_PARM_DESC(battery_reset,
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"Reset battery charge values to (0-0) before disabling it using (0-100)");
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module_param(report_brightness, bint, 0444);
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MODULE_PARM_DESC(report_brightness,
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"Report brightness keys.");
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/* Quirks */
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static int __init dmi_matched(const struct dmi_system_id *dmi)
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{
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quirks = dmi->driver_data;
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return 1;
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}
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static struct quirk_entry quirk_unknown = {
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};
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static struct quirk_entry quirk_battery_reset = {
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.battery_reset = true,
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};
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static struct quirk_entry quirk_matebook_x = {
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.ec_micmute = true,
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.report_brightness = true,
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};
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static const struct dmi_system_id huawei_quirks[] = {
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{
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.callback = dmi_matched,
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.ident = "Huawei MACH-WX9",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"),
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DMI_MATCH(DMI_PRODUCT_NAME, "MACH-WX9"),
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},
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.driver_data = &quirk_battery_reset
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},
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{
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.callback = dmi_matched,
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.ident = "Huawei MateBook X",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"),
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DMI_MATCH(DMI_PRODUCT_NAME, "HUAWEI MateBook X")
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},
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.driver_data = &quirk_matebook_x
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},
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{ }
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};
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/* Utils */
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static int huawei_wmi_call(struct huawei_wmi *huawei,
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struct acpi_buffer *in, struct acpi_buffer *out)
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{
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acpi_status status;
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mutex_lock(&huawei->wmi_lock);
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status = wmi_evaluate_method(HWMI_METHOD_GUID, 0, 1, in, out);
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mutex_unlock(&huawei->wmi_lock);
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if (ACPI_FAILURE(status)) {
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dev_err(huawei->dev, "Failed to evaluate wmi method\n");
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return -ENODEV;
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}
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return 0;
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}
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/* HWMI takes a 64 bit input and returns either a package with 2 buffers, one of
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* 4 bytes and the other of 256 bytes, or one buffer of size 0x104 (260) bytes.
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* The first 4 bytes are ignored, we ignore the first 4 bytes buffer if we got a
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* package, or skip the first 4 if a buffer of 0x104 is used. The first byte of
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* the remaining 0x100 sized buffer has the return status of every call. In case
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* the return status is non-zero, we return -ENODEV but still copy the returned
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* buffer to the given buffer parameter (buf).
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*/
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static int huawei_wmi_cmd(u64 arg, u8 *buf, size_t buflen)
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{
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struct huawei_wmi *huawei = huawei_wmi;
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struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_buffer in;
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union acpi_object *obj;
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size_t len;
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int err, i;
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in.length = sizeof(arg);
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in.pointer = &arg;
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/* Some models require calling HWMI twice to execute a command. We evaluate
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* HWMI and if we get a non-zero return status we evaluate it again.
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*/
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for (i = 0; i < 2; i++) {
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err = huawei_wmi_call(huawei, &in, &out);
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if (err)
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goto fail_cmd;
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obj = out.pointer;
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if (!obj) {
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err = -EIO;
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goto fail_cmd;
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}
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switch (obj->type) {
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/* Models that implement both "legacy" and HWMI tend to return a 0x104
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* sized buffer instead of a package of 0x4 and 0x100 buffers.
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*/
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case ACPI_TYPE_BUFFER:
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if (obj->buffer.length == 0x104) {
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// Skip the first 4 bytes.
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obj->buffer.pointer += 4;
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len = 0x100;
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} else {
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dev_err(huawei->dev, "Bad buffer length, got %d\n", obj->buffer.length);
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err = -EIO;
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goto fail_cmd;
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}
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break;
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/* HWMI returns a package with 2 buffer elements, one of 4 bytes and the
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* other is 256 bytes.
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*/
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case ACPI_TYPE_PACKAGE:
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if (obj->package.count != 2) {
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dev_err(huawei->dev, "Bad package count, got %d\n", obj->package.count);
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err = -EIO;
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goto fail_cmd;
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}
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obj = &obj->package.elements[1];
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if (obj->type != ACPI_TYPE_BUFFER) {
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dev_err(huawei->dev, "Bad package element type, got %d\n", obj->type);
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err = -EIO;
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goto fail_cmd;
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}
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len = obj->buffer.length;
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break;
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/* Shouldn't get here! */
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default:
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dev_err(huawei->dev, "Unexpected obj type, got: %d\n", obj->type);
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err = -EIO;
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goto fail_cmd;
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}
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if (!*obj->buffer.pointer)
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break;
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}
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err = (*obj->buffer.pointer) ? -ENODEV : 0;
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if (buf) {
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len = min(buflen, len);
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memcpy(buf, obj->buffer.pointer, len);
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}
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fail_cmd:
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kfree(out.pointer);
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return err;
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}
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/* LEDs */
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static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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/* This is a workaround until the "legacy" interface is implemented. */
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if (quirks && quirks->ec_micmute) {
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char *acpi_method;
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acpi_handle handle;
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acpi_status status;
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union acpi_object args[3];
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struct acpi_object_list arg_list = {
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.pointer = args,
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.count = ARRAY_SIZE(args),
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};
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handle = ec_get_handle();
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if (!handle)
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return -ENODEV;
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args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER;
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args[1].integer.value = 0x04;
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if (acpi_has_method(handle, "SPIN")) {
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acpi_method = "SPIN";
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args[0].integer.value = 0;
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args[2].integer.value = brightness ? 1 : 0;
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} else if (acpi_has_method(handle, "WPIN")) {
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acpi_method = "WPIN";
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args[0].integer.value = 1;
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args[2].integer.value = brightness ? 0 : 1;
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} else {
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return -ENODEV;
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}
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status = acpi_evaluate_object(handle, acpi_method, &arg_list, NULL);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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return 0;
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} else {
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union hwmi_arg arg;
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arg.cmd = MICMUTE_LED_SET;
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arg.args[2] = brightness;
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return huawei_wmi_cmd(arg.cmd, NULL, 0);
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}
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}
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static void huawei_wmi_leds_setup(struct device *dev)
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{
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struct huawei_wmi *huawei = dev_get_drvdata(dev);
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huawei->cdev.name = "platform::micmute";
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huawei->cdev.max_brightness = 1;
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huawei->cdev.brightness_set_blocking = &huawei_wmi_micmute_led_set;
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huawei->cdev.default_trigger = "audio-micmute";
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huawei->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
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huawei->cdev.dev = dev;
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huawei->cdev.flags = LED_CORE_SUSPENDRESUME;
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devm_led_classdev_register(dev, &huawei->cdev);
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}
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/* Battery protection */
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static int huawei_wmi_battery_get(int *start, int *end)
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{
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u8 ret[0x100];
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int err, i;
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err = huawei_wmi_cmd(BATTERY_THRESH_GET, ret, 0x100);
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if (err)
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return err;
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/* Find the last two non-zero values. Return status is ignored. */
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i = 0xff;
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do {
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if (start)
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*start = ret[i-1];
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if (end)
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*end = ret[i];
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} while (i > 2 && !ret[i--]);
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return 0;
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}
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static int huawei_wmi_battery_set(int start, int end)
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{
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union hwmi_arg arg;
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int err;
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if (start < 0 || end < 0 || start > 100 || end > 100)
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return -EINVAL;
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arg.cmd = BATTERY_THRESH_SET;
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arg.args[2] = start;
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arg.args[3] = end;
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/* This is an edge case were some models turn battery protection
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* off without changing their thresholds values. We clear the
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* values before turning off protection. Sometimes we need a sleep delay to
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* make sure these values make their way to EC memory.
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*/
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if (quirks && quirks->battery_reset && start == 0 && end == 100) {
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err = huawei_wmi_battery_set(0, 0);
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if (err)
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return err;
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msleep(1000);
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}
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err = huawei_wmi_cmd(arg.cmd, NULL, 0);
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return err;
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}
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static ssize_t charge_control_start_threshold_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int err, start;
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err = huawei_wmi_battery_get(&start, NULL);
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if (err)
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return err;
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return sprintf(buf, "%d\n", start);
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}
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static ssize_t charge_control_end_threshold_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int err, end;
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err = huawei_wmi_battery_get(NULL, &end);
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if (err)
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return err;
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return sprintf(buf, "%d\n", end);
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}
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static ssize_t charge_control_thresholds_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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int err, start, end;
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err = huawei_wmi_battery_get(&start, &end);
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if (err)
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return err;
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return sprintf(buf, "%d %d\n", start, end);
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}
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static ssize_t charge_control_start_threshold_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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int err, start, end;
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err = huawei_wmi_battery_get(NULL, &end);
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if (err)
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return err;
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if (sscanf(buf, "%d", &start) != 1)
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return -EINVAL;
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err = huawei_wmi_battery_set(start, end);
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if (err)
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return err;
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return size;
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}
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static ssize_t charge_control_end_threshold_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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int err, start, end;
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err = huawei_wmi_battery_get(&start, NULL);
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if (err)
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return err;
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|
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if (sscanf(buf, "%d", &end) != 1)
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return -EINVAL;
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|
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err = huawei_wmi_battery_set(start, end);
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if (err)
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return err;
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|
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return size;
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}
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|
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static ssize_t charge_control_thresholds_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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int err, start, end;
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|
|
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if (sscanf(buf, "%d %d", &start, &end) != 2)
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return -EINVAL;
|
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|
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err = huawei_wmi_battery_set(start, end);
|
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if (err)
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return err;
|
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|
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return size;
|
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}
|
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|
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static DEVICE_ATTR_RW(charge_control_start_threshold);
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static DEVICE_ATTR_RW(charge_control_end_threshold);
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static DEVICE_ATTR_RW(charge_control_thresholds);
|
|
|
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static int huawei_wmi_battery_add(struct power_supply *battery)
|
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{
|
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device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold);
|
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device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold);
|
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|
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return 0;
|
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}
|
|
|
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static int huawei_wmi_battery_remove(struct power_supply *battery)
|
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{
|
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device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold);
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device_remove_file(&battery->dev, &dev_attr_charge_control_end_threshold);
|
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|
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return 0;
|
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}
|
|
|
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static struct acpi_battery_hook huawei_wmi_battery_hook = {
|
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.add_battery = huawei_wmi_battery_add,
|
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.remove_battery = huawei_wmi_battery_remove,
|
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.name = "Huawei Battery Extension"
|
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};
|
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|
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static void huawei_wmi_battery_setup(struct device *dev)
|
|
{
|
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struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
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|
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huawei->battery_available = true;
|
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if (huawei_wmi_battery_get(NULL, NULL)) {
|
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huawei->battery_available = false;
|
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return;
|
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}
|
|
|
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battery_hook_register(&huawei_wmi_battery_hook);
|
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device_create_file(dev, &dev_attr_charge_control_thresholds);
|
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}
|
|
|
|
static void huawei_wmi_battery_exit(struct device *dev)
|
|
{
|
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struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
|
|
|
if (huawei->battery_available) {
|
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battery_hook_unregister(&huawei_wmi_battery_hook);
|
|
device_remove_file(dev, &dev_attr_charge_control_thresholds);
|
|
}
|
|
}
|
|
|
|
/* Fn lock */
|
|
|
|
static int huawei_wmi_fn_lock_get(int *on)
|
|
{
|
|
u8 ret[0x100] = { 0 };
|
|
int err, i;
|
|
|
|
err = huawei_wmi_cmd(FN_LOCK_GET, ret, 0x100);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Find the first non-zero value. Return status is ignored. */
|
|
i = 1;
|
|
do {
|
|
if (on)
|
|
*on = ret[i] - 1; // -1 undefined, 0 off, 1 on.
|
|
} while (i < 0xff && !ret[i++]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int huawei_wmi_fn_lock_set(int on)
|
|
{
|
|
union hwmi_arg arg;
|
|
|
|
arg.cmd = FN_LOCK_SET;
|
|
arg.args[2] = on + 1; // 0 undefined, 1 off, 2 on.
|
|
|
|
return huawei_wmi_cmd(arg.cmd, NULL, 0);
|
|
}
|
|
|
|
static ssize_t fn_lock_state_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int err, on;
|
|
|
|
err = huawei_wmi_fn_lock_get(&on);
|
|
if (err)
|
|
return err;
|
|
|
|
return sprintf(buf, "%d\n", on);
|
|
}
|
|
|
|
static ssize_t fn_lock_state_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
int on, err;
|
|
|
|
if (kstrtoint(buf, 10, &on) ||
|
|
on < 0 || on > 1)
|
|
return -EINVAL;
|
|
|
|
err = huawei_wmi_fn_lock_set(on);
|
|
if (err)
|
|
return err;
|
|
|
|
return size;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(fn_lock_state);
|
|
|
|
static void huawei_wmi_fn_lock_setup(struct device *dev)
|
|
{
|
|
struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
|
|
|
huawei->fn_lock_available = true;
|
|
if (huawei_wmi_fn_lock_get(NULL)) {
|
|
huawei->fn_lock_available = false;
|
|
return;
|
|
}
|
|
|
|
device_create_file(dev, &dev_attr_fn_lock_state);
|
|
}
|
|
|
|
static void huawei_wmi_fn_lock_exit(struct device *dev)
|
|
{
|
|
struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
|
|
|
if (huawei->fn_lock_available)
|
|
device_remove_file(dev, &dev_attr_fn_lock_state);
|
|
}
|
|
|
|
/* debugfs */
|
|
|
|
static void huawei_wmi_debugfs_call_dump(struct seq_file *m, void *data,
|
|
union acpi_object *obj)
|
|
{
|
|
struct huawei_wmi *huawei = m->private;
|
|
int i;
|
|
|
|
switch (obj->type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
seq_printf(m, "0x%llx", obj->integer.value);
|
|
break;
|
|
case ACPI_TYPE_STRING:
|
|
seq_printf(m, "\"%.*s\"", obj->string.length, obj->string.pointer);
|
|
break;
|
|
case ACPI_TYPE_BUFFER:
|
|
seq_puts(m, "{");
|
|
for (i = 0; i < obj->buffer.length; i++) {
|
|
seq_printf(m, "0x%02x", obj->buffer.pointer[i]);
|
|
if (i < obj->buffer.length - 1)
|
|
seq_puts(m, ",");
|
|
}
|
|
seq_puts(m, "}");
|
|
break;
|
|
case ACPI_TYPE_PACKAGE:
|
|
seq_puts(m, "[");
|
|
for (i = 0; i < obj->package.count; i++) {
|
|
huawei_wmi_debugfs_call_dump(m, huawei, &obj->package.elements[i]);
|
|
if (i < obj->package.count - 1)
|
|
seq_puts(m, ",");
|
|
}
|
|
seq_puts(m, "]");
|
|
break;
|
|
default:
|
|
dev_err(huawei->dev, "Unexpected obj type, got %d\n", obj->type);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int huawei_wmi_debugfs_call_show(struct seq_file *m, void *data)
|
|
{
|
|
struct huawei_wmi *huawei = m->private;
|
|
struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
struct acpi_buffer in;
|
|
union acpi_object *obj;
|
|
int err;
|
|
|
|
in.length = sizeof(u64);
|
|
in.pointer = &huawei->debug.arg;
|
|
|
|
err = huawei_wmi_call(huawei, &in, &out);
|
|
if (err)
|
|
return err;
|
|
|
|
obj = out.pointer;
|
|
if (!obj) {
|
|
err = -EIO;
|
|
goto fail_debugfs_call;
|
|
}
|
|
|
|
huawei_wmi_debugfs_call_dump(m, huawei, obj);
|
|
|
|
fail_debugfs_call:
|
|
kfree(out.pointer);
|
|
return err;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(huawei_wmi_debugfs_call);
|
|
|
|
static void huawei_wmi_debugfs_setup(struct device *dev)
|
|
{
|
|
struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
|
|
|
huawei->debug.root = debugfs_create_dir("huawei-wmi", NULL);
|
|
|
|
debugfs_create_x64("arg", 0644, huawei->debug.root,
|
|
&huawei->debug.arg);
|
|
debugfs_create_file("call", 0400,
|
|
huawei->debug.root, huawei, &huawei_wmi_debugfs_call_fops);
|
|
}
|
|
|
|
static void huawei_wmi_debugfs_exit(struct device *dev)
|
|
{
|
|
struct huawei_wmi *huawei = dev_get_drvdata(dev);
|
|
|
|
debugfs_remove_recursive(huawei->debug.root);
|
|
}
|
|
|
|
/* Input */
|
|
|
|
static void huawei_wmi_process_key(struct input_dev *idev, int code)
|
|
{
|
|
const struct key_entry *key;
|
|
|
|
/*
|
|
* WMI0 uses code 0x80 to indicate a hotkey event.
|
|
* The actual key is fetched from the method WQ00
|
|
* using WMI0_EXPENSIVE_GUID.
|
|
*/
|
|
if (code == 0x80) {
|
|
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
acpi_status status;
|
|
|
|
status = wmi_query_block(WMI0_EXPENSIVE_GUID, 0, &response);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
obj = (union acpi_object *)response.pointer;
|
|
if (obj && obj->type == ACPI_TYPE_INTEGER)
|
|
code = obj->integer.value;
|
|
|
|
kfree(response.pointer);
|
|
}
|
|
|
|
key = sparse_keymap_entry_from_scancode(idev, code);
|
|
if (!key) {
|
|
dev_info(&idev->dev, "Unknown key pressed, code: 0x%04x\n", code);
|
|
return;
|
|
}
|
|
|
|
if (quirks && !quirks->report_brightness &&
|
|
(key->sw.code == KEY_BRIGHTNESSDOWN ||
|
|
key->sw.code == KEY_BRIGHTNESSUP))
|
|
return;
|
|
|
|
sparse_keymap_report_entry(idev, key, 1, true);
|
|
}
|
|
|
|
static void huawei_wmi_input_notify(u32 value, void *context)
|
|
{
|
|
struct input_dev *idev = (struct input_dev *)context;
|
|
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
acpi_status status;
|
|
|
|
status = wmi_get_event_data(value, &response);
|
|
if (ACPI_FAILURE(status)) {
|
|
dev_err(&idev->dev, "Unable to get event data\n");
|
|
return;
|
|
}
|
|
|
|
obj = (union acpi_object *)response.pointer;
|
|
if (obj && obj->type == ACPI_TYPE_INTEGER)
|
|
huawei_wmi_process_key(idev, obj->integer.value);
|
|
else
|
|
dev_err(&idev->dev, "Bad response type\n");
|
|
|
|
kfree(response.pointer);
|
|
}
|
|
|
|
static int huawei_wmi_input_setup(struct device *dev,
|
|
const char *guid,
|
|
struct input_dev **idev)
|
|
{
|
|
*idev = devm_input_allocate_device(dev);
|
|
if (!*idev)
|
|
return -ENOMEM;
|
|
|
|
(*idev)->name = "Huawei WMI hotkeys";
|
|
(*idev)->phys = "wmi/input0";
|
|
(*idev)->id.bustype = BUS_HOST;
|
|
(*idev)->dev.parent = dev;
|
|
|
|
return sparse_keymap_setup(*idev, huawei_wmi_keymap, NULL) ||
|
|
input_register_device(*idev) ||
|
|
wmi_install_notify_handler(guid, huawei_wmi_input_notify,
|
|
*idev);
|
|
}
|
|
|
|
static void huawei_wmi_input_exit(struct device *dev, const char *guid)
|
|
{
|
|
wmi_remove_notify_handler(guid);
|
|
}
|
|
|
|
/* Huawei driver */
|
|
|
|
static const struct wmi_device_id huawei_wmi_events_id_table[] = {
|
|
{ .guid_string = WMI0_EVENT_GUID },
|
|
{ .guid_string = HWMI_EVENT_GUID },
|
|
{ }
|
|
};
|
|
|
|
static int huawei_wmi_probe(struct platform_device *pdev)
|
|
{
|
|
const struct wmi_device_id *guid = huawei_wmi_events_id_table;
|
|
int err;
|
|
|
|
platform_set_drvdata(pdev, huawei_wmi);
|
|
huawei_wmi->dev = &pdev->dev;
|
|
|
|
while (*guid->guid_string) {
|
|
struct input_dev *idev = *huawei_wmi->idev;
|
|
|
|
if (wmi_has_guid(guid->guid_string)) {
|
|
err = huawei_wmi_input_setup(&pdev->dev, guid->guid_string, &idev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to setup input on %s\n", guid->guid_string);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
idev++;
|
|
guid++;
|
|
}
|
|
|
|
if (wmi_has_guid(HWMI_METHOD_GUID)) {
|
|
mutex_init(&huawei_wmi->wmi_lock);
|
|
|
|
huawei_wmi_leds_setup(&pdev->dev);
|
|
huawei_wmi_fn_lock_setup(&pdev->dev);
|
|
huawei_wmi_battery_setup(&pdev->dev);
|
|
huawei_wmi_debugfs_setup(&pdev->dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int huawei_wmi_remove(struct platform_device *pdev)
|
|
{
|
|
const struct wmi_device_id *guid = huawei_wmi_events_id_table;
|
|
|
|
while (*guid->guid_string) {
|
|
if (wmi_has_guid(guid->guid_string))
|
|
huawei_wmi_input_exit(&pdev->dev, guid->guid_string);
|
|
|
|
guid++;
|
|
}
|
|
|
|
if (wmi_has_guid(HWMI_METHOD_GUID)) {
|
|
huawei_wmi_debugfs_exit(&pdev->dev);
|
|
huawei_wmi_battery_exit(&pdev->dev);
|
|
huawei_wmi_fn_lock_exit(&pdev->dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver huawei_wmi_driver = {
|
|
.driver = {
|
|
.name = "huawei-wmi",
|
|
},
|
|
.probe = huawei_wmi_probe,
|
|
.remove = huawei_wmi_remove,
|
|
};
|
|
|
|
static __init int huawei_wmi_init(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
int err;
|
|
|
|
huawei_wmi = kzalloc(sizeof(struct huawei_wmi), GFP_KERNEL);
|
|
if (!huawei_wmi)
|
|
return -ENOMEM;
|
|
|
|
quirks = &quirk_unknown;
|
|
dmi_check_system(huawei_quirks);
|
|
if (battery_reset != -1)
|
|
quirks->battery_reset = battery_reset;
|
|
if (report_brightness != -1)
|
|
quirks->report_brightness = report_brightness;
|
|
|
|
err = platform_driver_register(&huawei_wmi_driver);
|
|
if (err)
|
|
goto pdrv_err;
|
|
|
|
pdev = platform_device_register_simple("huawei-wmi", -1, NULL, 0);
|
|
if (IS_ERR(pdev)) {
|
|
err = PTR_ERR(pdev);
|
|
goto pdev_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
pdev_err:
|
|
platform_driver_unregister(&huawei_wmi_driver);
|
|
pdrv_err:
|
|
kfree(huawei_wmi);
|
|
return err;
|
|
}
|
|
|
|
static __exit void huawei_wmi_exit(void)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(huawei_wmi->dev);
|
|
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&huawei_wmi_driver);
|
|
|
|
kfree(huawei_wmi);
|
|
}
|
|
|
|
module_init(huawei_wmi_init);
|
|
module_exit(huawei_wmi_exit);
|
|
|
|
MODULE_ALIAS("wmi:"HWMI_METHOD_GUID);
|
|
MODULE_DEVICE_TABLE(wmi, huawei_wmi_events_id_table);
|
|
MODULE_AUTHOR("Ayman Bagabas <ayman.bagabas@gmail.com>");
|
|
MODULE_DESCRIPTION("Huawei WMI laptop extras driver");
|
|
MODULE_LICENSE("GPL v2");
|