Merge branch 'for-6.11/apple' into for-linus (a07ead31) · Commits · git / linux-net

drivers/hid/hid-apple.c

+87 −0

Original line number	Diff line number	Diff line
		@@ -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 @@ static int apple_backlight_init(struct hid_device *hdev)
		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 },

		{ }
		};