mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
899 lines
20 KiB
899 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Huawei WMI laptop extras driver |
|
* |
|
* Copyright (C) 2018 Ayman Bagabas <[email protected]> |
|
*/ |
|
|
|
#include <linux/acpi.h> |
|
#include <linux/debugfs.h> |
|
#include <linux/delay.h> |
|
#include <linux/dmi.h> |
|
#include <linux/input.h> |
|
#include <linux/input/sparse-keymap.h> |
|
#include <linux/leds.h> |
|
#include <linux/module.h> |
|
#include <linux/mutex.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/power_supply.h> |
|
#include <linux/sysfs.h> |
|
#include <linux/wmi.h> |
|
#include <acpi/battery.h> |
|
|
|
/* |
|
* Huawei WMI GUIDs |
|
*/ |
|
#define HWMI_METHOD_GUID "ABBC0F5B-8EA1-11D1-A000-C90629100000" |
|
#define HWMI_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000" |
|
|
|
/* Legacy GUIDs */ |
|
#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100" |
|
#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100" |
|
|
|
/* HWMI commands */ |
|
|
|
enum { |
|
BATTERY_THRESH_GET = 0x00001103, /* \GBTT */ |
|
BATTERY_THRESH_SET = 0x00001003, /* \SBTT */ |
|
FN_LOCK_GET = 0x00000604, /* \GFRS */ |
|
FN_LOCK_SET = 0x00000704, /* \SFRS */ |
|
MICMUTE_LED_SET = 0x00000b04, /* \SMLS */ |
|
}; |
|
|
|
union hwmi_arg { |
|
u64 cmd; |
|
u8 args[8]; |
|
}; |
|
|
|
struct quirk_entry { |
|
bool battery_reset; |
|
bool ec_micmute; |
|
bool report_brightness; |
|
}; |
|
|
|
static struct quirk_entry *quirks; |
|
|
|
struct huawei_wmi_debug { |
|
struct dentry *root; |
|
u64 arg; |
|
}; |
|
|
|
struct huawei_wmi { |
|
bool battery_available; |
|
bool fn_lock_available; |
|
|
|
struct huawei_wmi_debug debug; |
|
struct input_dev *idev[2]; |
|
struct led_classdev cdev; |
|
struct device *dev; |
|
|
|
struct mutex wmi_lock; |
|
}; |
|
|
|
static struct huawei_wmi *huawei_wmi; |
|
|
|
static const struct key_entry huawei_wmi_keymap[] = { |
|
{ KE_KEY, 0x281, { KEY_BRIGHTNESSDOWN } }, |
|
{ KE_KEY, 0x282, { KEY_BRIGHTNESSUP } }, |
|
{ KE_KEY, 0x284, { KEY_MUTE } }, |
|
{ KE_KEY, 0x285, { KEY_VOLUMEDOWN } }, |
|
{ KE_KEY, 0x286, { KEY_VOLUMEUP } }, |
|
{ KE_KEY, 0x287, { KEY_MICMUTE } }, |
|
{ KE_KEY, 0x289, { KEY_WLAN } }, |
|
// Huawei |M| key |
|
{ KE_KEY, 0x28a, { KEY_CONFIG } }, |
|
// Keyboard backlit |
|
{ KE_IGNORE, 0x293, { KEY_KBDILLUMTOGGLE } }, |
|
{ KE_IGNORE, 0x294, { KEY_KBDILLUMUP } }, |
|
{ KE_IGNORE, 0x295, { KEY_KBDILLUMUP } }, |
|
{ KE_END, 0 } |
|
}; |
|
|
|
static int battery_reset = -1; |
|
static int report_brightness = -1; |
|
|
|
module_param(battery_reset, bint, 0444); |
|
MODULE_PARM_DESC(battery_reset, |
|
"Reset battery charge values to (0-0) before disabling it using (0-100)"); |
|
module_param(report_brightness, bint, 0444); |
|
MODULE_PARM_DESC(report_brightness, |
|
"Report brightness keys."); |
|
|
|
/* Quirks */ |
|
|
|
static int __init dmi_matched(const struct dmi_system_id *dmi) |
|
{ |
|
quirks = dmi->driver_data; |
|
return 1; |
|
} |
|
|
|
static struct quirk_entry quirk_unknown = { |
|
}; |
|
|
|
static struct quirk_entry quirk_battery_reset = { |
|
.battery_reset = true, |
|
}; |
|
|
|
static struct quirk_entry quirk_matebook_x = { |
|
.ec_micmute = true, |
|
.report_brightness = true, |
|
}; |
|
|
|
static const struct dmi_system_id huawei_quirks[] = { |
|
{ |
|
.callback = dmi_matched, |
|
.ident = "Huawei MACH-WX9", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "MACH-WX9"), |
|
}, |
|
.driver_data = &quirk_battery_reset |
|
}, |
|
{ |
|
.callback = dmi_matched, |
|
.ident = "Huawei MateBook X", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "HUAWEI"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "HUAWEI MateBook X") |
|
}, |
|
.driver_data = &quirk_matebook_x |
|
}, |
|
{ } |
|
}; |
|
|
|
/* Utils */ |
|
|
|
static int huawei_wmi_call(struct huawei_wmi *huawei, |
|
struct acpi_buffer *in, struct acpi_buffer *out) |
|
{ |
|
acpi_status status; |
|
|
|
mutex_lock(&huawei->wmi_lock); |
|
status = wmi_evaluate_method(HWMI_METHOD_GUID, 0, 1, in, out); |
|
mutex_unlock(&huawei->wmi_lock); |
|
if (ACPI_FAILURE(status)) { |
|
dev_err(huawei->dev, "Failed to evaluate wmi method\n"); |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* HWMI takes a 64 bit input and returns either a package with 2 buffers, one of |
|
* 4 bytes and the other of 256 bytes, or one buffer of size 0x104 (260) bytes. |
|
* The first 4 bytes are ignored, we ignore the first 4 bytes buffer if we got a |
|
* package, or skip the first 4 if a buffer of 0x104 is used. The first byte of |
|
* the remaining 0x100 sized buffer has the return status of every call. In case |
|
* the return status is non-zero, we return -ENODEV but still copy the returned |
|
* buffer to the given buffer parameter (buf). |
|
*/ |
|
static int huawei_wmi_cmd(u64 arg, u8 *buf, size_t buflen) |
|
{ |
|
struct huawei_wmi *huawei = huawei_wmi; |
|
struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL }; |
|
struct acpi_buffer in; |
|
union acpi_object *obj; |
|
size_t len; |
|
int err, i; |
|
|
|
in.length = sizeof(arg); |
|
in.pointer = &arg; |
|
|
|
/* Some models require calling HWMI twice to execute a command. We evaluate |
|
* HWMI and if we get a non-zero return status we evaluate it again. |
|
*/ |
|
for (i = 0; i < 2; i++) { |
|
err = huawei_wmi_call(huawei, &in, &out); |
|
if (err) |
|
goto fail_cmd; |
|
|
|
obj = out.pointer; |
|
if (!obj) { |
|
err = -EIO; |
|
goto fail_cmd; |
|
} |
|
|
|
switch (obj->type) { |
|
/* Models that implement both "legacy" and HWMI tend to return a 0x104 |
|
* sized buffer instead of a package of 0x4 and 0x100 buffers. |
|
*/ |
|
case ACPI_TYPE_BUFFER: |
|
if (obj->buffer.length == 0x104) { |
|
// Skip the first 4 bytes. |
|
obj->buffer.pointer += 4; |
|
len = 0x100; |
|
} else { |
|
dev_err(huawei->dev, "Bad buffer length, got %d\n", obj->buffer.length); |
|
err = -EIO; |
|
goto fail_cmd; |
|
} |
|
|
|
break; |
|
/* HWMI returns a package with 2 buffer elements, one of 4 bytes and the |
|
* other is 256 bytes. |
|
*/ |
|
case ACPI_TYPE_PACKAGE: |
|
if (obj->package.count != 2) { |
|
dev_err(huawei->dev, "Bad package count, got %d\n", obj->package.count); |
|
err = -EIO; |
|
goto fail_cmd; |
|
} |
|
|
|
obj = &obj->package.elements[1]; |
|
if (obj->type != ACPI_TYPE_BUFFER) { |
|
dev_err(huawei->dev, "Bad package element type, got %d\n", obj->type); |
|
err = -EIO; |
|
goto fail_cmd; |
|
} |
|
len = obj->buffer.length; |
|
|
|
break; |
|
/* Shouldn't get here! */ |
|
default: |
|
dev_err(huawei->dev, "Unexpected obj type, got: %d\n", obj->type); |
|
err = -EIO; |
|
goto fail_cmd; |
|
} |
|
|
|
if (!*obj->buffer.pointer) |
|
break; |
|
} |
|
|
|
err = (*obj->buffer.pointer) ? -ENODEV : 0; |
|
|
|
if (buf) { |
|
len = min(buflen, len); |
|
memcpy(buf, obj->buffer.pointer, len); |
|
} |
|
|
|
fail_cmd: |
|
kfree(out.pointer); |
|
return err; |
|
} |
|
|
|
/* LEDs */ |
|
|
|
static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev, |
|
enum led_brightness brightness) |
|
{ |
|
/* This is a workaround until the "legacy" interface is implemented. */ |
|
if (quirks && quirks->ec_micmute) { |
|
char *acpi_method; |
|
acpi_handle handle; |
|
acpi_status status; |
|
union acpi_object args[3]; |
|
struct acpi_object_list arg_list = { |
|
.pointer = args, |
|
.count = ARRAY_SIZE(args), |
|
}; |
|
|
|
handle = ec_get_handle(); |
|
if (!handle) |
|
return -ENODEV; |
|
|
|
args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER; |
|
args[1].integer.value = 0x04; |
|
|
|
if (acpi_has_method(handle, "SPIN")) { |
|
acpi_method = "SPIN"; |
|
args[0].integer.value = 0; |
|
args[2].integer.value = brightness ? 1 : 0; |
|
} else if (acpi_has_method(handle, "WPIN")) { |
|
acpi_method = "WPIN"; |
|
args[0].integer.value = 1; |
|
args[2].integer.value = brightness ? 0 : 1; |
|
} else { |
|
return -ENODEV; |
|
} |
|
|
|
status = acpi_evaluate_object(handle, acpi_method, &arg_list, NULL); |
|
if (ACPI_FAILURE(status)) |
|
return -ENODEV; |
|
|
|
return 0; |
|
} else { |
|
union hwmi_arg arg; |
|
|
|
arg.cmd = MICMUTE_LED_SET; |
|
arg.args[2] = brightness; |
|
|
|
return huawei_wmi_cmd(arg.cmd, NULL, 0); |
|
} |
|
} |
|
|
|
static void huawei_wmi_leds_setup(struct device *dev) |
|
{ |
|
struct huawei_wmi *huawei = dev_get_drvdata(dev); |
|
|
|
huawei->cdev.name = "platform::micmute"; |
|
huawei->cdev.max_brightness = 1; |
|
huawei->cdev.brightness_set_blocking = &huawei_wmi_micmute_led_set; |
|
huawei->cdev.default_trigger = "audio-micmute"; |
|
huawei->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); |
|
huawei->cdev.dev = dev; |
|
huawei->cdev.flags = LED_CORE_SUSPENDRESUME; |
|
|
|
devm_led_classdev_register(dev, &huawei->cdev); |
|
} |
|
|
|
/* Battery protection */ |
|
|
|
static int huawei_wmi_battery_get(int *start, int *end) |
|
{ |
|
u8 ret[0x100]; |
|
int err, i; |
|
|
|
err = huawei_wmi_cmd(BATTERY_THRESH_GET, ret, 0x100); |
|
if (err) |
|
return err; |
|
|
|
/* Find the last two non-zero values. Return status is ignored. */ |
|
i = 0xff; |
|
do { |
|
if (start) |
|
*start = ret[i-1]; |
|
if (end) |
|
*end = ret[i]; |
|
} while (i > 2 && !ret[i--]); |
|
|
|
return 0; |
|
} |
|
|
|
static int huawei_wmi_battery_set(int start, int end) |
|
{ |
|
union hwmi_arg arg; |
|
int err; |
|
|
|
if (start < 0 || end < 0 || start > 100 || end > 100) |
|
return -EINVAL; |
|
|
|
arg.cmd = BATTERY_THRESH_SET; |
|
arg.args[2] = start; |
|
arg.args[3] = end; |
|
|
|
/* This is an edge case were some models turn battery protection |
|
* off without changing their thresholds values. We clear the |
|
* values before turning off protection. Sometimes we need a sleep delay to |
|
* make sure these values make their way to EC memory. |
|
*/ |
|
if (quirks && quirks->battery_reset && start == 0 && end == 100) { |
|
err = huawei_wmi_battery_set(0, 0); |
|
if (err) |
|
return err; |
|
|
|
msleep(1000); |
|
} |
|
|
|
err = huawei_wmi_cmd(arg.cmd, NULL, 0); |
|
|
|
return err; |
|
} |
|
|
|
static ssize_t charge_control_start_threshold_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
int err, start; |
|
|
|
err = huawei_wmi_battery_get(&start, NULL); |
|
if (err) |
|
return err; |
|
|
|
return sprintf(buf, "%d\n", start); |
|
} |
|
|
|
static ssize_t charge_control_end_threshold_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
int err, end; |
|
|
|
err = huawei_wmi_battery_get(NULL, &end); |
|
if (err) |
|
return err; |
|
|
|
return sprintf(buf, "%d\n", end); |
|
} |
|
|
|
static ssize_t charge_control_thresholds_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
int err, start, end; |
|
|
|
err = huawei_wmi_battery_get(&start, &end); |
|
if (err) |
|
return err; |
|
|
|
return sprintf(buf, "%d %d\n", start, end); |
|
} |
|
|
|
static ssize_t charge_control_start_threshold_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t size) |
|
{ |
|
int err, start, end; |
|
|
|
err = huawei_wmi_battery_get(NULL, &end); |
|
if (err) |
|
return err; |
|
|
|
if (sscanf(buf, "%d", &start) != 1) |
|
return -EINVAL; |
|
|
|
err = huawei_wmi_battery_set(start, end); |
|
if (err) |
|
return err; |
|
|
|
return size; |
|
} |
|
|
|
static ssize_t charge_control_end_threshold_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t size) |
|
{ |
|
int err, start, end; |
|
|
|
err = huawei_wmi_battery_get(&start, NULL); |
|
if (err) |
|
return err; |
|
|
|
if (sscanf(buf, "%d", &end) != 1) |
|
return -EINVAL; |
|
|
|
err = huawei_wmi_battery_set(start, end); |
|
if (err) |
|
return err; |
|
|
|
return size; |
|
} |
|
|
|
static ssize_t charge_control_thresholds_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t size) |
|
{ |
|
int err, start, end; |
|
|
|
if (sscanf(buf, "%d %d", &start, &end) != 2) |
|
return -EINVAL; |
|
|
|
err = huawei_wmi_battery_set(start, end); |
|
if (err) |
|
return err; |
|
|
|
return size; |
|
} |
|
|
|
static DEVICE_ATTR_RW(charge_control_start_threshold); |
|
static DEVICE_ATTR_RW(charge_control_end_threshold); |
|
static DEVICE_ATTR_RW(charge_control_thresholds); |
|
|
|
static int huawei_wmi_battery_add(struct power_supply *battery) |
|
{ |
|
device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold); |
|
device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold); |
|
|
|
return 0; |
|
} |
|
|
|
static int huawei_wmi_battery_remove(struct power_supply *battery) |
|
{ |
|
device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold); |
|
device_remove_file(&battery->dev, &dev_attr_charge_control_end_threshold); |
|
|
|
return 0; |
|
} |
|
|
|
static struct acpi_battery_hook huawei_wmi_battery_hook = { |
|
.add_battery = huawei_wmi_battery_add, |
|
.remove_battery = huawei_wmi_battery_remove, |
|
.name = "Huawei Battery Extension" |
|
}; |
|
|
|
static void huawei_wmi_battery_setup(struct device *dev) |
|
{ |
|
struct huawei_wmi *huawei = dev_get_drvdata(dev); |
|
|
|
huawei->battery_available = true; |
|
if (huawei_wmi_battery_get(NULL, NULL)) { |
|
huawei->battery_available = false; |
|
return; |
|
} |
|
|
|
battery_hook_register(&huawei_wmi_battery_hook); |
|
device_create_file(dev, &dev_attr_charge_control_thresholds); |
|
} |
|
|
|
static void huawei_wmi_battery_exit(struct device *dev) |
|
{ |
|
struct huawei_wmi *huawei = dev_get_drvdata(dev); |
|
|
|
if (huawei->battery_available) { |
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Huawei WMI laptop extras driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|