path: root/drivers/hid/hid-lenovo.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  HID driver for Lenovo:
 *  - ThinkPad USB Keyboard with TrackPoint (tpkbd)
 *  - ThinkPad Compact Bluetooth Keyboard with TrackPoint (cptkbd)
 *  - ThinkPad Compact USB Keyboard with TrackPoint (cptkbd)
 *
 *  Copyright (c) 2012 Bernhard Seibold
 *  Copyright (c) 2014 Jamie Lentin <jm@lentin.co.uk>
 *
 * Linux IBM/Lenovo Scrollpoint mouse driver:
 * - IBM Scrollpoint III
 * - IBM Scrollpoint Pro
 * - IBM Scrollpoint Optical
 * - IBM Scrollpoint Optical 800dpi
 * - IBM Scrollpoint Optical 800dpi Pro
 * - Lenovo Scrollpoint Optical
 *
 *  Copyright (c) 2012 Peter De Wachter <pdewacht@gmail.com>
 *  Copyright (c) 2018 Peter Ganzhorn <peter.ganzhorn@gmail.com>
 */

/*
 */

#include <linux/module.h>
#include <linux/sysfs.h>
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/leds.h>
#include <linux/workqueue.h>

#include "hid-ids.h"

struct lenovo_drvdata {
	u8 led_report[3]; /* Must be first for proper alignment */
	int led_state;
	struct mutex led_report_mutex;
	struct led_classdev led_mute;
	struct led_classdev led_micmute;
	struct work_struct fn_lock_sync_work;
	struct hid_device *hdev;
	int press_to_select;
	int dragging;
	int release_to_select;
	int select_right;
	int sensitivity;
	int press_speed;
	u8 middlebutton_state; /* 0:Up, 1:Down (undecided), 2:Scrolling */
	bool fn_lock;
};

#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))

#define TP10UBKBD_LED_OUTPUT_REPORT	9

#define TP10UBKBD_FN_LOCK_LED		0x54
#define TP10UBKBD_MUTE_LED		0x64
#define TP10UBKBD_MICMUTE_LED		0x74

#define TP10UBKBD_LED_OFF		1
#define TP10UBKBD_LED_ON		2

static void lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code,
				     enum led_brightness value)
{
	struct lenovo_drvdata *data = hid_get_drvdata(hdev);
	int ret;

	mutex_lock(&data->led_report_mutex);

	data->led_report[0] = TP10UBKBD_LED_OUTPUT_REPORT;
	data->led_report[1] = led_code;
	data->led_report[2] = value ? TP10UBKBD_LED_ON : TP10UBKBD_LED_OFF;
	ret = hid_hw_raw_request(hdev, data->led_report[0], data->led_report, 3,
				 HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
	if (ret)
		hid_err(hdev, "Set LED output report error: %d\n", ret);

	mutex_unlock(&data->led_report_mutex);
}

static void lenovo_tp10ubkbd_sync_fn_lock(struct work_struct *work)
{
	struct lenovo_drvdata *data =
		container_of(work, struct lenovo_drvdata, fn_lock_sync_work);

	lenovo_led_set_tp10ubkbd(data->hdev, TP10UBKBD_FN_LOCK_LED,
				 data->fn_lock);
}

static const __u8 lenovo_pro_dock_need_fixup_collection[] = {
	0x05, 0x88,		/* Usage Page (Vendor Usage Page 0x88)	*/
	0x09, 0x01,		/* Usage (Vendor Usage 0x01)		*/
	0xa1, 0x01,		/* Collection (Application)		*/
	0x85, 0x04,		/*  Report ID (4)			*/
	0x19, 0x00,		/*  Usage Minimum (0)			*/
	0x2a, 0xff, 0xff,	/*  Usage Maximum (65535)		*/
};

static __u8 *lenovo_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	switch (hdev->product) {
	case USB_DEVICE_ID_LENOVO_TPPRODOCK:
		/* the fixups that need to be done:
		 *   - get a reasonable usage max for the vendor collection
		 *     0x8801 from the report ID 4
		 */
		if (*rsize >= 153 &&
		    memcmp(&rdesc[140], lenovo_pro_dock_need_fixup_collection,
			  sizeof(lenovo_pro_dock_need_fixup_collection)) == 0) {
			rdesc[151] = 0x01;
			rdesc[152] = 0x00;
		}
		break;
	}
	return rdesc;
}

static int lenovo_input_mapping_tpkbd(struct hid_device *hdev,
		struct hid_input *hi, struct hid_field *field,
		struct hid_usage *usage, unsigned long **bit, int *max)
{
	if (usage->hid == (HID_UP_BUTTON | 0x0010)) {
		/* This sub-device contains trackpoint, mark it */
		hid_set_drvdata(hdev, (void *)1);
		map_key_clear(KEY_MICMUTE);
		return 1;
	}
	return 0;
}

static int lenovo_input_mapping_cptkbd(struct hid_device *hdev,
		struct hid_input *hi, struct hid_field *field,
		struct hid_usage *usage, unsigned long **bit, int *max)
{
	/* HID_UP_LNVENDOR = USB, HID_UP_MSVENDOR = BT */
	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR ||
	    (usage->hid & HID_USAGE_PAGE) == HID_UP_LNVENDOR) {
		switch (usage->hid & HID_USAGE) {
		case 0x00f1: /* Fn-F4: Mic mute */
			map_key_clear(KEY_MICMUTE);
			return 1;
		case 0x00f2: /* Fn-F5: Brightness down */
			map_key_clear(KEY_BRIGHTNESSDOWN);
			return 1;
		case 0x00f3: /* Fn-F6: Brightness up */
			map_key_clear(KEY_BRIGHTNESSUP);
			return 1;
		case 0x00f4: /* Fn-F7: External display (projector) */
			map_key_clear