diff options
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-apple.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c index bd022e004356..6dedb84d7cc3 100644 --- a/drivers/hid/hid-apple.c +++ b/drivers/hid/hid-apple.c @@ -8,6 +8,8 @@ * Copyright (c) 2006-2007 Jiri Kosina * Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com> * Copyright (c) 2019 Paul Pawlowski <paul@mrarm.io> + * Copyright (c) 2023 Orlando Chamberlain <orlandoch.dev@gmail.com> + * Copyright (c) 2024 Aditya Garg <gargaditya08@live.com> */ /* @@ -23,6 +25,7 @@ #include <linux/timer.h> #include <linux/string.h> #include <linux/leds.h> +#include <dt-bindings/leds/common.h> #include "hid-ids.h" @@ -38,12 +41,17 @@ #define APPLE_RDESC_BATTERY BIT(9) #define APPLE_BACKLIGHT_CTL BIT(10) #define APPLE_IS_NON_APPLE BIT(11) +#define APPLE_MAGIC_BACKLIGHT BIT(12) #define APPLE_FLAG_FKEY 0x01 #define HID_COUNTRY_INTERNATIONAL_ISO 13 #define APPLE_BATTERY_TIMEOUT_MS 60000 +#define HID_USAGE_MAGIC_BL 0xff00000f +#define APPLE_MAGIC_REPORT_ID_POWER 3 +#define APPLE_MAGIC_REPORT_ID_BRIGHTNESS 1 + static unsigned int fnmode = 3; module_param(fnmode, uint, 0644); MODULE_PARM_DESC(fnmode, "Mode of fn key on Apple keyboards (0 = disabled, " @@ -81,6 +89,12 @@ struct apple_sc_backlight { struct hid_device *hdev; }; +struct apple_magic_backlight { + struct led_classdev cdev; + struct hid_report *brightness; + struct hid_report *power; +}; + struct apple_sc { struct hid_device *hdev; unsigned long quirks; @@ -822,6 +836,66 @@ cleanup_and_exit: return ret; } +static void apple_magic_backlight_report_set(struct hid_report *rep, s32 value, u8 rate) +{ + rep->field[0]->value[0] = value; + rep->field[1]->value[0] = 0x5e; /* Mimic Windows */ + rep->field[1]->value[0] |= rate << 8; + + hid_hw_request(rep->device, rep, HID_REQ_SET_REPORT); +} + +static void apple_magic_backlight_set(struct apple_magic_backlight *backlight, + int brightness, char rate) +{ + apple_magic_backlight_report_set(backlight->power, brightness ? 1 : 0, rate); + if (brightness) + apple_magic_backlight_report_set(backlight->brightness, brightness, rate); +} + +static int apple_magic_backlight_led_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct apple_magic_backlight *backlight = container_of(led_cdev, + struct apple_magic_backlight, cdev); + + apple_magic_backlight_set(backlight, brightness, 1); + return 0; +} + +static int apple_magic_backlight_init(struct hid_device *hdev) +{ + struct apple_magic_backlight *backlight; + struct hid_report_enum *report_enum; + + /* + * Ensure this usb endpoint is for the keyboard backlight, not touchbar + * backlight. + */ + if (hdev->collection[0].usage != HID_USAGE_MAGIC_BL) + return -ENODEV; + + backlight = devm_kzalloc(&hdev->dev, sizeof(*backlight), GFP_KERNEL); + if (!backlight) + return -ENOMEM; + + report_enum = &hdev->report_enum[HID_FEATURE_REPORT]; + backlight->brightness = report_enum->report_id_hash[APPLE_MAGIC_REPORT_ID_BRIGHTNESS]; + backlight->power = report_enum->report_id_hash[APPLE_MAGIC_REPORT_ID_POWER]; + + if (!backlight->brightness || !backlight->power) + return -ENODEV; + + backlight->cdev.name = ":white:" LED_FUNCTION_KBD_BACKLIGHT; + backlight->cdev.max_brightness = backlight->brightness->field[0]->logical_maximum; + backlight->cdev.brightness_set_blocking = apple_magic_backlight_led_set; + + apple_magic_backlight_set(backlight, 0, 0); + + return devm_led_classdev_register(&hdev->dev, &backlight->cdev); + +} + static int apple_probe(struct hid_device *hdev, const struct hid_device_id *id) { @@ -860,7 +934,18 @@ static int apple_probe(struct hid_device *hdev, if (quirks & APPLE_BACKLIGHT_CTL) apple_backlight_init(hdev); + if (quirks & APPLE_MAGIC_BACKLIGHT) { + ret = apple_magic_backlight_init(hdev); + if (ret) + goto out_err; + } + return 0; + +out_err: + del_timer_sync(&asc->battery_timer); + hid_hw_stop(hdev); + return ret; } static void apple_remove(struct hid_device *hdev) @@ -1073,6 +1158,8 @@ static const struct hid_device_id apple_devices[] = { .driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK | APPLE_RDESC_BATTERY }, { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021), .driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK }, + { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_TOUCHBAR_BACKLIGHT), + .driver_data = APPLE_MAGIC_BACKLIGHT }, { } }; |