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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  HID driver for Asus notebook built-in keyboard.
 *  Fixes small logical maximum to match usage maximum.
 *
 *  Currently supported devices are:
 *    EeeBook X205TA
 *    VivoBook E200HA
 *
 *  Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
 *
 *  This module based on hid-ortek by
 *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
 *  Copyright (c) 2011 Jiri Kosina
 *
 *  This module has been updated to add support for Asus i2c touchpad.
 *
 *  Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
 *  Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
 *  Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
 */

/*
 */

#include <linux/dmi.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/platform_data/x86/asus-wmi.h>
#include <linux/input/mt.h>
#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
#include <linux/power_supply.h>

#include "hid-ids.h"

MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");

#define T100_TPAD_INTF 2

#define T100CHI_MOUSE_REPORT_ID 0x06
#define FEATURE_REPORT_ID 0x0d
#define INPUT_REPORT_ID 0x5d
#define FEATURE_KBD_REPORT_ID 0x5a
#define FEATURE_KBD_REPORT_SIZE 16

#define SUPPORT_KBD_BACKLIGHT BIT(0)

#define MAX_TOUCH_MAJOR 8
#define MAX_PRESSURE 128

#define BTN_LEFT_MASK 0x01
#define CONTACT_TOOL_TYPE_MASK 0x80
#define CONTACT_X_MSB_MASK 0xf0
#define CONTACT_Y_MSB_MASK 0x0f
#define CONTACT_TOUCH_MAJOR_MASK 0x07
#define CONTACT_PRESSURE_MASK 0x7f

#define	BATTERY_REPORT_ID	(0x03)
#define	BATTERY_REPORT_SIZE	(1 + 8)
#define	BATTERY_LEVEL_MAX	((u8)255)
#define	BATTERY_STAT_DISCONNECT	(0)
#define	BATTERY_STAT_CHARGING	(1)
#define	BATTERY_STAT_FULL	(2)

#define QUIRK_FIX_NOTEBOOK_REPORT	BIT(0)
#define QUIRK_NO_INIT_REPORTS		BIT(1)
#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 QUIRK_T100_KEYBOARD		BIT(6)
#define QUIRK_T100CHI			BIT(7)
#define QUIRK_G752_KEYBOARD		BIT(8)
#define QUIRK_T101HA_DOCK		BIT(9)
#define QUIRK_T90CHI			BIT(10)

#define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
						 QUIRK_NO_INIT_REPORTS | \
						 QUIRK_NO_CONSUMER_USAGES)
#define I2C_TOUCHPAD_QUIRKS			(QUIRK_NO_INIT_REPORTS | \
						 QUIRK_SKIP_INPUT_MAPPING | \
						 QUIRK_IS_MULTITOUCH)

#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_touchpad_info {
	int max_x;
	int max_y;
	int res_x;
	int res_y;
	int contact_size;
	int max_contacts;
};

struct asus_drvdata {
	unsigned long quirks;
	struct hid_device *hdev;
	struct input_dev *input;
	struct asus_kbd_leds *kbd_backlight;
	const struct asus_touchpad_info *tp;
	bool enable_backlight;
	struct power_supply *battery;
	struct power_supply_desc battery_desc;
	int battery_capacity;
	int battery_stat;
	bool battery_in_query;
	unsigned long battery_next_query;
};

static int asus_report_battery(struct asus_drvdata *, u8 *, int);

static const struct asus_touchpad_info asus_i2c_tp = {
	.max_x = 2794,
	.max_y = 1758,
	.contact_size = 5,
	.max_contacts = 5,
};

static const struct asus_touchpad_info asus_t100ta_tp = {
	.max_x = 2240,
	.max_y = 1120,
	.res_x = 30, /* units/mm */
	.res_y = 27, /* units/mm */
	.contact_size = 5,
	.max_contacts = 5,
};

static const struct asus_touchpad_info asus_t100ha_tp = {
	.max_x = 2640,
	.max_y = 1320,
	.res_x = 30, /* units/mm */
	.res_y = 29, /* units/mm */
	.contact_size = 5,
	.max_contacts = 5,
};

static const struct asus_touchpad_info asus_t200ta_tp = {
	.max_x = 3120,
	.max_y = 1716,
	.res_x = 30, /* units/mm */
	.res_y = 28, /* units/mm */
	.contact_size = 5,
	.max_contacts = 5,
};

static const struct asus_touchpad_info asus_t100chi_tp = {
	.max_x = 2640,
	.max_y = 1320,
	.res_x = 31, /* units/mm */
	.res_y = 29, /* units/mm */
	.contact_size = 3,
	.max_contacts = 4,
};

static void asus_report_contact_down(struct asus_drvdata *drvdat,
		int toolType, u8 *data)
{
	struct input_dev *input = drvdat->input;
	int touch_major, pressure, x, y;

	x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
	y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);

	input_report_abs(input, ABS_MT_POSITION_X, x);
	input_report_abs(input, ABS_MT_POSITION_Y, y);

	if (drvdat->tp->contact_size < 5)
		return;

	if (toolType == MT_TOOL_PALM) {
		touch_major = MAX_TOUCH_MAJOR;
		pressure = MAX_PRESSURE;
	} else {
		touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
		pressure = data[4] & CONTACT_PRESSURE_MASK;
	}

	input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
	input_report_abs(input, ABS_MT_PRESSURE, pressure);
}

/* Required for Synaptics Palm Detection */
static void asus_report_tool_width(struct asus_drvdata *drvdat)
{
	struct input_mt *mt = drvdat->input->mt;
	struct input_mt_slot *oldest;
	int oldid, count, i;

	if (drvdat->tp->co