diff options
Diffstat (limited to 'drivers/hid/hid-asus.c')
| -rw-r--r-- | drivers/hid/hid-asus.c | 183 |
1 files changed, 182 insertions, 1 deletions
diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index bacba97668bf..16df6cc90235 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -40,8 +40,12 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define FEATURE_REPORT_ID 0x0d #define INPUT_REPORT_ID 0x5d +#define FEATURE_KBD_REPORT_ID 0x5a #define INPUT_REPORT_SIZE 28 +#define FEATURE_KBD_REPORT_SIZE 16 + +#define SUPPORT_KBD_BACKLIGHT BIT(0) #define MAX_CONTACTS 5 @@ -64,6 +68,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define QUIRK_SKIP_INPUT_MAPPING BIT(2) #define QUIRK_IS_MULTITOUCH BIT(3) #define QUIRK_NO_CONSUMER_USAGES BIT(4) +#define QUIRK_USE_KBD_BACKLIGHT BIT(5) #define I2C_KEYBOARD_QUIRKS (QUIRK_FIX_NOTEBOOK_REPORT | \ QUIRK_NO_INIT_REPORTS | \ @@ -74,9 +79,19 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define TRKID_SGN ((TRKID_MAX + 1) >> 1) +struct asus_kbd_leds { + struct led_classdev cdev; + struct hid_device *hdev; + struct work_struct work; + unsigned int brightness; + bool removed; +}; + struct asus_drvdata { unsigned long quirks; struct input_dev *input; + struct asus_kbd_leds *kbd_backlight; + bool enable_backlight; }; static void asus_report_contact_down(struct input_dev *input, @@ -171,6 +186,148 @@ static int asus_raw_event(struct hid_device *hdev, return 0; } +static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size) +{ + unsigned char *dmabuf; + int ret; + + dmabuf = kmemdup(buf, buf_size, GFP_KERNEL); + if (!dmabuf) + return -ENOMEM; + + ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf, + buf_size, HID_FEATURE_REPORT, + HID_REQ_SET_REPORT); + kfree(dmabuf); + + return ret; +} + +static int asus_kbd_init(struct hid_device *hdev) +{ + u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54, + 0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 }; + int ret; + + ret = asus_kbd_set_report(hdev, buf, sizeof(buf)); + if (ret < 0) + hid_err(hdev, "Asus failed to send init command: %d\n", ret); + + return ret; +} + +static int asus_kbd_get_functions(struct hid_device *hdev, + unsigned char *kbd_func) +{ + u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 }; + u8 *readbuf; + int ret; + + ret = asus_kbd_set_report(hdev, buf, sizeof(buf)); + if (ret < 0) { + hid_err(hdev, "Asus failed to send configuration command: %d\n", ret); + return ret; + } + + readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL); + if (!readbuf) + return -ENOMEM; + + ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf, + FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT, + HID_REQ_GET_REPORT); + if (ret < 0) { + hid_err(hdev, "Asus failed to request functions: %d\n", ret); + kfree(readbuf); + return ret; + } + + *kbd_func = readbuf[6]; + + kfree(readbuf); + return ret; +} + +static void asus_kbd_backlight_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds, + cdev); + if (led->brightness == brightness) + return; + + led->brightness = brightness; + schedule_work(&led->work); +} + +static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev) +{ + struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds, + cdev); + + return led->brightness; +} + +static void asus_kbd_backlight_work(struct work_struct *work) +{ + struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work); + u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 }; + int ret; + + if (led->removed) + return; + + buf[4] = led->brightness; + + ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf)); + if (ret < 0) + hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret); +} + +static int asus_kbd_register_leds(struct hid_device *hdev) +{ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + unsigned char kbd_func; + int ret; + + /* Initialize keyboard */ + ret = asus_kbd_init(hdev); + if (ret < 0) + return ret; + + /* Get keyboard functions */ + ret = asus_kbd_get_functions(hdev, &kbd_func); + if (ret < 0) + return ret; + + /* Check for backlight support */ + if (!(kbd_func & SUPPORT_KBD_BACKLIGHT)) + return -ENODEV; + + drvdata->kbd_backlight = devm_kzalloc(&hdev->dev, + sizeof(struct asus_kbd_leds), + GFP_KERNEL); + if (!drvdata->kbd_backlight) + return -ENOMEM; + + drvdata->kbd_backlight->removed = false; + drvdata->kbd_backlight->brightness = 0; + drvdata->kbd_backlight->hdev = hdev; + drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight"; + drvdata->kbd_backlight->cdev.max_brightness = 3; + drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set; + drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get; + INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work); + + ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev); + if (ret < 0) { + /* No need to have this still around */ + devm_kfree(&hdev->dev, drvdata->kbd_backlight); + } + + return ret; +} + static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi) { struct input_dev *input = hi->input; @@ -198,6 +355,9 @@ static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi) drvdata->input = input; + if (drvdata->enable_backlight && asus_kbd_register_leds(hdev)) + hid_warn(hdev, "Failed to initialize backlight.\n"); + return 0; } @@ -248,6 +408,16 @@ static int asus_input_mapping(struct hid_device *hdev, * as some make the keyboard appear as a pointer device. */ return -1; } + + /* + * Check and enable backlight only on devices with UsagePage == + * 0xff31 to avoid initializing the keyboard firmware multiple + * times on devices with multiple HID descriptors but same + * PID/VID. + */ + if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT) + drvdata->enable_backlight = true; + return 1; } @@ -358,6 +528,16 @@ err_stop_hw: return ret; } +static void asus_remove(struct hid_device *hdev) +{ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + + if (drvdata->kbd_backlight) { + drvdata->kbd_backlight->removed = true; + cancel_work_sync(&drvdata->kbd_backlight->work); + } +} + static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { @@ -379,7 +559,7 @@ static const struct hid_device_id asus_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) }, { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, - USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2) }, + USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT }, { } }; MODULE_DEVICE_TABLE(hid, asus_devices); @@ -389,6 +569,7 @@ static struct hid_driver asus_driver = { .id_table = asus_devices, .report_fixup = asus_report_fixup, .probe = asus_probe, + .remove = asus_remove, .input_mapping = asus_input_mapping, .input_configured = asus_input_configured, #ifdef CONFIG_PM |