| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Huawei WMI laptop extras driver |
| * |
| * Copyright (C) 2018 Ayman Bagabas <ayman.bagabas@gmail.com> |
| */ |
| |
| #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 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 } }, |
| // Ignore Ambient Light Sensoring |
| { KE_KEY, 0x2c1, { KEY_RESERVED } }, |
| { 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.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, sizeof(ret)); |
| if (err) |
| return err; |
| |
| /* Find the last two non-zero values. Return status is ignored. */ |
| i = ARRAY_SIZE(ret) - 1; |
| 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, struct acpi_battery_hook *hook) |
| { |
| int err = 0; |
| |
| err = device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold); |
| if (err) |
| return err; |
| |
| err = device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold); |
| if (err) |
| device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold); |
| |
| return err; |
| } |
| |
| static int huawei_wmi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook) |
| { |
| 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; |
| acpi_status status; |
| int err; |
| |
| 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; |
| |
| err = sparse_keymap_setup(idev, huawei_wmi_keymap, NULL); |
| if (err) |
| return err; |
| |
| err = input_register_device(idev); |
| if (err) |
| return err; |
| |
| status = wmi_install_notify_handler(guid, huawei_wmi_input_notify, idev); |
| if (ACPI_FAILURE(status)) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| 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) { |
| if (wmi_has_guid(guid->guid_string)) { |
| err = huawei_wmi_input_setup(&pdev->dev, guid->guid_string); |
| if (err) { |
| dev_err(&pdev->dev, "Failed to setup input on %s\n", guid->guid_string); |
| return err; |
| } |
| } |
| |
| 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 void 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); |
| } |
| } |
| |
| static struct platform_driver huawei_wmi_driver = { |
| .driver = { |
| .name = "huawei-wmi", |
| }, |
| .probe = huawei_wmi_probe, |
| .remove_new = 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", PLATFORM_DEVID_NONE, 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"); |