[linux-block.git] / drivers / hid / hid-asus.c

/*
 *  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>
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 */

#include <linux/hid.h>
#include <linux/module.h>
#include <linux/input/mt.h>
#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */

#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 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 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 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 contact_size;
	int max_contacts;
};

struct asus_drvdata {
	unsigned long quirks;
	struct input_dev *input;
	struct asus_kbd_leds *kbd_backlight;
	const struct asus_touchpad_info *tp;
	bool enable_backlight;
};

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 = 1758,
	.contact_size = 5,
	.max_contacts = 5,
};

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]);

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

	oldest = NULL;
	oldid = mt->trkid;
	count = 0;

	for (i = 0; i < mt->num_slots; ++i) {
		struct input_mt_slot *ps = &mt->slots[i];
		int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);

		if (id < 0)
			continue;
		if ((id - oldid) & TRKID_SGN) {
			oldest = ps;
			oldid = id;
		}
		count++;
	}

	if (oldest) {
		input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
			input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
	}
}

static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
{
	int i;
	u8 *contactData = data + 2;

	if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
		return 0;

	for (i = 0; i < drvdat->tp->max_contacts; i++) {
		bool down = !!(data[1] & BIT(i+3));
		int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
						MT_TOOL_PALM : MT_TOOL_FINGER;

		input_mt_slot(drvdat->input, i);
		input_mt_report_slot_state(drvdat->input, toolType, down);

		if (down) {
			asus_report_contact_down(drvdat, toolType, contactData);
			contactData += drvdat->tp->contact_size;
		}
	}

	input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
	asus_report_tool_width(drvdat);

	input_mt_sync_frame(drvdat->input);
	input_sync(drvdat->input);

	return 1;
}

static int asus_raw_event(struct hid_device *hdev,
		struct hid_report *report, u8 *data, int size)
{
	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->tp && data[0] == INPUT_REPORT_ID)
		return asus_report_input(drvdata, data, size);

	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;
	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->tp) {
		int ret;

		input_set_abs_params(input, ABS_MT_POSITION_X, 0,
				     drvdata->tp->max_x, 0, 0);
		input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
				     drvdata->tp->max_y, 0, 0);
		input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
		input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
		input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);

		__set_bit(BTN_LEFT, input->keybit);
		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);

		ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
					  INPUT_MT_POINTER);

		if (ret) {
			hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
			return ret;
		}
	}

	drvdata->input = input;

	if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
		hid_warn(hdev, "Failed to initialize backlight.\n");

	return 0;
}

#define asus_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, \
						    max, EV_KEY, (c))
static int asus_input_mapping(struct hid_device *hdev,
		struct hid_input *hi, struct hid_field *field,
		struct hid_usage *usage, unsigned long **bit,
		int *max)
{
	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
		/* Don't map anything from the HID report.
		 * We do it all manually in asus_input_configured
		 */
		return -1;
	}

	/* ASUS-specific keyboard hotkeys */
	if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
		set_bit(EV_REP, hi->input->evbit);
		switch (usage->hid & HID_USAGE) {
		case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN);	break;
		case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP);		break;
		case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF);		break;
		case 0x6c: asus_map_key_clear(KEY_SLEEP);		break;
		case 0x82: asus_map_key_clear(KEY_CAMERA);		break;
		case 0x88: asus_map_key_clear(KEY_RFKILL);			break;
		case 0xb5: asus_map_key_clear(KEY_CALC);			break;
		case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);		break;
		case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN);		break;

		/* ASUS touchpad toggle */
		case 0x6b: asus_map_key_clear(KEY_F21);			break;

		/* ROG key */
		case 0x38: asus_map_key_clear(KEY_PROG1);		break;

		/* Fn+C ASUS Splendid */
		case 0xba: asus_map_key_clear(KEY_PROG2);		break;

		/* Fn+Space Power4Gear Hybrid */
		case 0x5c: asus_map_key_clear(KEY_PROG3);		break;

		default:
			/* ASUS lazily declares 256 usages, ignore the rest,
			 * 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;
	}

	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
		set_bit(EV_REP, hi->input->evbit);
		switch (usage->hid & HID_USAGE) {
		case 0xff01: asus_map_key_clear(BTN_1);	break;
		case 0xff02: asus_map_key_clear(BTN_2);	break;
		case 0xff03: asus_map_key_clear(BTN_3);	break;
		case 0xff04: asus_map_key_clear(BTN_4);	break;
		case 0xff05: asus_map_key_clear(BTN_5);	break;
		case 0xff06: asus_map_key_clear(BTN_6);	break;
		case 0xff07: asus_map_key_clear(BTN_7);	break;
		case 0xff08: asus_map_key_clear(BTN_8);	break;
		case 0xff09: asus_map_key_clear(BTN_9);	break;
		case 0xff0a: asus_map_key_clear(BTN_A);	break;
		case 0xff0b: asus_map_key_clear(BTN_B);	break;
		case 0x00f1: asus_map_key_clear(KEY_WLAN);	break;
		case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN);	break;
		case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP);	break;
		case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF);	break;
		case 0x00f7: asus_map_key_clear(KEY_CAMERA);	break;
		case 0x00f8: asus_map_key_clear(KEY_PROG1);	break;
		default:
			return 0;
		}

		return 1;
	}

	if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
		(usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
		switch (usage->hid & HID_USAGE) {
		case 0xe2: /* Mute */
		case 0xe9: /* Volume up */
		case 0xea: /* Volume down */
			return 0;
		default:
			/* Ignore dummy Consumer usages which make the
			 * keyboard incorrectly appear as a pointer device.
			 */
			return -1;
		}
	}

	return 0;
}

static int asus_start_multitouch(struct hid_device *hdev)
{
	int ret;
	const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
	unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);

	if (!dmabuf) {
		ret = -ENOMEM;
		hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
		return ret;
	}

	ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
					HID_FEATURE_REPORT, HID_REQ_SET_REPORT);

	kfree(dmabuf);

	if (ret != sizeof(buf)) {
		hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
		return ret;
	}

	return 0;
}

static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
{
	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->tp)
		return asus_start_multitouch(hdev);

	return 0;
}

static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret;
	struct asus_drvdata *drvdata;

	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
	if (drvdata == NULL) {
		hid_err(hdev, "Can't alloc Asus descriptor\n");
		return -ENOMEM;
	}

	hid_set_drvdata(hdev, drvdata);

	drvdata->quirks = id->driver_data;

	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
		drvdata->tp = &asus_i2c_tp;

	if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);

		if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
			drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
			drvdata->tp = &asus_t100ta_tp;
		}
	}

	if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
		hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "Asus hid parse failed: %d\n", ret);
		return ret;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "Asus hw start failed: %d\n", ret);
		return ret;
	}

	if (!drvdata->input) {
		hid_err(hdev, "Asus input not registered\n");
		ret = -ENOMEM;
		goto err_stop_hw;
	}

	if (drvdata->tp) {
		drvdata->input->name = "Asus TouchPad";
	} else {
		drvdata->input->name = "Asus Keyboard";
	}

	if (drvdata->tp) {
		ret = asus_start_multitouch(hdev);
		if (ret)
			goto err_stop_hw;
	}

	return 0;
err_stop_hw:
	hid_hw_stop(hdev);
	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);
	}

	hid_hw_stop(hdev);
}

static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
			*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
		hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
		rdesc[55] = 0xdd;
	}
	if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
		 *rsize == 76 && rdesc[73] == 0x81 && rdesc[74] == 0x01) {
		hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
		rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
	}

	return rdesc;
}

static const struct hid_device_id asus_devices[] = {
	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
		USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
		USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
	{ 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), QUIRK_USE_KBD_BACKLIGHT },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
		USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD),
	  QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
	{ }
};
MODULE_DEVICE_TABLE(hid, asus_devices);

static struct hid_driver asus_driver = {
	.name			= "asus",
	.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
	.reset_resume           = asus_reset_resume,
#endif
	.raw_event		= asus_raw_event
};
module_hid_driver(asus_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
eeb01a57	1	/*
b94f7d5d	2	* HID driver for Asus notebook built-in keyboard.
eeb01a57 YF	3	* Fixes small logical maximum to match usage maximum.
eeb01a57 YF	4	*
b94f7d5d YF	5	* Currently supported devices are:
	6	* EeeBook X205TA
	7	* VivoBook E200HA
	8	*
eeb01a57 YF	9	* Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
	10	*
	11	* This module based on hid-ortek by
	12	* Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
	13	* Copyright (c) 2011 Jiri Kosina
9ce12d8b BM	14	*
	15	* This module has been updated to add support for Asus i2c touchpad.
	16	*
	17	* Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
	18	* Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
	19	* Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
eeb01a57 YF	20	*/
	21
	22	/*
	23	* This program is free software; you can redistribute it and/or modify it
	24	* under the terms of the GNU General Public License as published by the Free
	25	* Software Foundation; either version 2 of the License, or (at your option)
	26	* any later version.
	27	*/
	28
eeb01a57 YF	29	#include <linux/hid.h>
eeb01a57 YF	30	#include <linux/module.h>
9ce12d8b	31	#include <linux/input/mt.h>
57573c54	32	#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
eeb01a57 YF	33
	34	#include "hid-ids.h"
	35
9ce12d8b BM	36	MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
	37	MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
	38	MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
	39	MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
	40	MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
	41
57573c54 HG	42	#define T100_TPAD_INTF 2
57573c54 HG	43
9ce12d8b BM	44	#define FEATURE_REPORT_ID 0x0d
9ce12d8b BM	45	#define INPUT_REPORT_ID 0x5d
af22a610	46	#define FEATURE_KBD_REPORT_ID 0x5a
af22a610 CC	47	#define FEATURE_KBD_REPORT_SIZE 16
	48
	49	#define SUPPORT_KBD_BACKLIGHT BIT(0)
9ce12d8b	50
9ce12d8b BM	51	#define MAX_TOUCH_MAJOR 8
	52	#define MAX_PRESSURE 128
	53
9ce12d8b BM	54	#define BTN_LEFT_MASK 0x01
	55	#define CONTACT_TOOL_TYPE_MASK 0x80
	56	#define CONTACT_X_MSB_MASK 0xf0
	57	#define CONTACT_Y_MSB_MASK 0x0f
	58	#define CONTACT_TOUCH_MAJOR_MASK 0x07
	59	#define CONTACT_PRESSURE_MASK 0x7f
	60
	61	#define QUIRK_FIX_NOTEBOOK_REPORT BIT(0)
	62	#define QUIRK_NO_INIT_REPORTS BIT(1)
	63	#define QUIRK_SKIP_INPUT_MAPPING BIT(2)
	64	#define QUIRK_IS_MULTITOUCH BIT(3)
0485b1ec	65	#define QUIRK_NO_CONSUMER_USAGES BIT(4)
af22a610	66	#define QUIRK_USE_KBD_BACKLIGHT BIT(5)
76dd1fbe	67	#define QUIRK_T100_KEYBOARD BIT(6)
9ce12d8b	68
a93913e1	69	#define I2C_KEYBOARD_QUIRKS (QUIRK_FIX_NOTEBOOK_REPORT \| \
0485b1ec MH	70	QUIRK_NO_INIT_REPORTS \| \
0485b1ec MH	71	QUIRK_NO_CONSUMER_USAGES)
c81760b9	72	#define I2C_TOUCHPAD_QUIRKS (QUIRK_NO_INIT_REPORTS \| \
9ce12d8b BM	73	QUIRK_SKIP_INPUT_MAPPING \| \
	74	QUIRK_IS_MULTITOUCH)
	75
	76	#define TRKID_SGN ((TRKID_MAX + 1) >> 1)
	77
af22a610 CC	78	struct asus_kbd_leds {
	79	struct led_classdev cdev;
	80	struct hid_device *hdev;
	81	struct work_struct work;
	82	unsigned int brightness;
	83	bool removed;
	84	};
	85
c81760b9 HG	86	struct asus_touchpad_info {
	87	int max_x;
	88	int max_y;
	89	int contact_size;
	90	int max_contacts;
	91	};
	92
9ce12d8b BM	93	struct asus_drvdata {
	94	unsigned long quirks;
	95	struct input_dev *input;
af22a610	96	struct asus_kbd_leds *kbd_backlight;
c81760b9	97	const struct asus_touchpad_info *tp;
af22a610	98	bool enable_backlight;
9ce12d8b BM	99	};
9ce12d8b BM	100
c81760b9 HG	101	static const struct asus_touchpad_info asus_i2c_tp = {
	102	.max_x = 2794,
	103	.max_y = 1758,
	104	.contact_size = 5,
	105	.max_contacts = 5,
	106	};
	107
	108	static const struct asus_touchpad_info asus_t100ta_tp = {
	109	.max_x = 2240,
	110	.max_y = 1758,
	111	.contact_size = 5,
	112	.max_contacts = 5,
	113	};
	114
	115	static void asus_report_contact_down(struct asus_drvdata *drvdat,
9ce12d8b BM	116	int toolType, u8 *data)
9ce12d8b BM	117	{
c81760b9 HG	118	struct input_dev *input = drvdat->input;
	119	int touch_major, pressure, x, y;
	120
	121	x = (data[0] & CONTACT_X_MSB_MASK) << 4 \| data[1];
	122	y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 \| data[2]);
9ce12d8b BM	123
	124	if (toolType == MT_TOOL_PALM) {
	125	touch_major = MAX_TOUCH_MAJOR;
	126	pressure = MAX_PRESSURE;
	127	} else {
	128	touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
	129	pressure = data[4] & CONTACT_PRESSURE_MASK;
	130	}
	131
	132	input_report_abs(input, ABS_MT_POSITION_X, x);
	133	input_report_abs(input, ABS_MT_POSITION_Y, y);
	134	input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
	135	input_report_abs(input, ABS_MT_PRESSURE, pressure);
	136	}
	137
	138	/* Required for Synaptics Palm Detection */
c81760b9	139	static void asus_report_tool_width(struct asus_drvdata *drvdat)
9ce12d8b	140	{
c81760b9	141	struct input_mt *mt = drvdat->input->mt;
9ce12d8b BM	142	struct input_mt_slot *oldest;
	143	int oldid, count, i;
	144
	145	oldest = NULL;
	146	oldid = mt->trkid;
	147	count = 0;
	148
	149	for (i = 0; i < mt->num_slots; ++i) {
	150	struct input_mt_slot *ps = &mt->slots[i];
	151	int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
	152
	153	if (id < 0)
	154	continue;
	155	if ((id - oldid) & TRKID_SGN) {
	156	oldest = ps;
	157	oldid = id;
	158	}
	159	count++;
	160	}
	161
	162	if (oldest) {
c81760b9	163	input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
9ce12d8b BM	164	input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
	165	}
	166	}
	167
c81760b9	168	static int asus_report_input(struct asus_drvdata drvdat, u8 data, int size)
9ce12d8b BM	169	{
	170	int i;
	171	u8 *contactData = data + 2;
	172
c81760b9 HG	173	if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
	174	return 0;
	175
	176	for (i = 0; i < drvdat->tp->max_contacts; i++) {
9ce12d8b BM	177	bool down = !!(data[1] & BIT(i+3));
	178	int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
	179	MT_TOOL_PALM : MT_TOOL_FINGER;
	180
c81760b9 HG	181	input_mt_slot(drvdat->input, i);
c81760b9 HG	182	input_mt_report_slot_state(drvdat->input, toolType, down);
9ce12d8b BM	183
9ce12d8b BM	184	if (down) {
c81760b9 HG	185	asus_report_contact_down(drvdat, toolType, contactData);
c81760b9 HG	186	contactData += drvdat->tp->contact_size;
9ce12d8b BM	187	}
	188	}
	189
c81760b9 HG	190	input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
	191	asus_report_tool_width(drvdat);
	192
	193	input_mt_sync_frame(drvdat->input);
	194	input_sync(drvdat->input);
9ce12d8b	195
c81760b9	196	return 1;
9ce12d8b BM	197	}
	198
	199	static int asus_raw_event(struct hid_device *hdev,
	200	struct hid_report report, u8 data, int size)
	201	{
	202	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
	203
c81760b9 HG	204	if (drvdata->tp && data[0] == INPUT_REPORT_ID)
c81760b9 HG	205	return asus_report_input(drvdata, data, size);
9ce12d8b BM	206
	207	return 0;
	208	}
	209
af22a610 CC	210	static int asus_kbd_set_report(struct hid_device hdev, u8 buf, size_t buf_size)
	211	{
	212	unsigned char *dmabuf;
	213	int ret;
	214
	215	dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
	216	if (!dmabuf)
	217	return -ENOMEM;
	218
	219	ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
	220	buf_size, HID_FEATURE_REPORT,
	221	HID_REQ_SET_REPORT);
	222	kfree(dmabuf);
	223
	224	return ret;
	225	}
	226
	227	static int asus_kbd_init(struct hid_device *hdev)
	228	{
	229	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
	230	0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
	231	int ret;
	232
	233	ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
	234	if (ret < 0)
	235	hid_err(hdev, "Asus failed to send init command: %d\n", ret);
	236
	237	return ret;
	238	}
	239
	240	static int asus_kbd_get_functions(struct hid_device *hdev,
	241	unsigned char *kbd_func)
	242	{
	243	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
	244	u8 *readbuf;
	245	int ret;
	246
	247	ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
	248	if (ret < 0) {
	249	hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
	250	return ret;
	251	}
	252
	253	readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
	254	if (!readbuf)
	255	return -ENOMEM;
	256
	257	ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
	258	FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
	259	HID_REQ_GET_REPORT);
	260	if (ret < 0) {
	261	hid_err(hdev, "Asus failed to request functions: %d\n", ret);
	262	kfree(readbuf);
	263	return ret;
	264	}
	265
	266	*kbd_func = readbuf[6];
	267
	268	kfree(readbuf);
	269	return ret;
	270	}
	271
	272	static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
	273	enum led_brightness brightness)
274	{
275	struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
276	cdev);
277	if (led->brightness == brightness)
278	return;
279
280	led->brightness = brightness;
281	schedule_work(&led->work);
282	}
283
284	static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
285	{
286	struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
287	cdev);
288
289	return led->brightness;
290	}
291
292	static void asus_kbd_backlight_work(struct work_struct *work)
293	{
294	struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
295	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
296	int ret;
297
298	if (led->removed)
299	return;
300
301	buf[4] = led->brightness;
302
303	ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
304	if (ret < 0)
305	hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
306	}
307
308	static int asus_kbd_register_leds(struct hid_device *hdev)
309	{
310	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
311	unsigned char kbd_func;
312	int ret;
313
314	/* Initialize keyboard */
315	ret = asus_kbd_init(hdev);
316	if (ret < 0)
317	return ret;
318
319	/* Get keyboard functions */
320	ret = asus_kbd_get_functions(hdev, &kbd_func);
321	if (ret < 0)
322	return ret;
323
324	/* Check for backlight support */
325	if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
326	return -ENODEV;
327
328	drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
329	sizeof(struct asus_kbd_leds),
330	GFP_KERNEL);
331	if (!drvdata->kbd_backlight)
332	return -ENOMEM;
333
334	drvdata->kbd_backlight->removed = false;
335	drvdata->kbd_backlight->brightness = 0;
336	drvdata->kbd_backlight->hdev = hdev;
337	drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
338	drvdata->kbd_backlight->cdev.max_brightness = 3;
339	drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
340	drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
341	INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
342
343	ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
344	if (ret < 0) {
345	/* No need to have this still around */
346	devm_kfree(&hdev->dev, drvdata->kbd_backlight);
347	}
348
349	return ret;
350	}
351
9ce12d8b BM	352	static int asus_input_configured(struct hid_device hdev, struct hid_input hi)
9ce12d8b BM	353	{
c8b1b3dd	354	struct input_dev *input = hi->input;
9ce12d8b BM	355	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
9ce12d8b BM	356
c81760b9	357	if (drvdata->tp) {
9ce12d8b	358	int ret;
9ce12d8b	359
c81760b9 HG	360	input_set_abs_params(input, ABS_MT_POSITION_X, 0,
	361	drvdata->tp->max_x, 0, 0);
	362	input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
	363	drvdata->tp->max_y, 0, 0);
9ce12d8b BM	364	input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
	365	input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
	366	input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);
	367
	368	__set_bit(BTN_LEFT, input->keybit);
	369	__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
	370
c81760b9 HG	371	ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
c81760b9 HG	372	INPUT_MT_POINTER);
9ce12d8b BM	373
	374	if (ret) {
	375	hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
	376	return ret;
	377	}
9ce12d8b BM	378	}
9ce12d8b BM	379
c8b1b3dd BM	380	drvdata->input = input;
c8b1b3dd BM	381
af22a610 CC	382	if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
	383	hid_warn(hdev, "Failed to initialize backlight.\n");
	384
9ce12d8b BM	385	return 0;
	386	}
	387
a93913e1	388	#define asus_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1caccc25	389	max, EV_KEY, (c))
9ce12d8b BM	390	static int asus_input_mapping(struct hid_device *hdev,
	391	struct hid_input hi, struct hid_field field,
	392	struct hid_usage usage, unsigned long *bit,
	393	int *max)
	394	{
	395	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
	396
	397	if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
	398	/* Don't map anything from the HID report.
	399	* We do it all manually in asus_input_configured
	400	*/
	401	return -1;
	402	}
	403
a93913e1	404	/* ASUS-specific keyboard hotkeys */
1caccc25 CC	405	if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
	406	set_bit(EV_REP, hi->input->evbit);
	407	switch (usage->hid & HID_USAGE) {
a93913e1 MH	408	case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN); break;
	409	case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP); break;
	410	case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF); break;
	411	case 0x6c: asus_map_key_clear(KEY_SLEEP); break;
	412	case 0x82: asus_map_key_clear(KEY_CAMERA); break;
802b24b4	413	case 0x88: asus_map_key_clear(KEY_RFKILL); break;
a93913e1 MH	414	case 0xb5: asus_map_key_clear(KEY_CALC); break;
	415	case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP); break;
	416	case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN); break;
1caccc25 CC	417
1caccc25 CC	418	/* ASUS touchpad toggle */
a93913e1	419	case 0x6b: asus_map_key_clear(KEY_F21); break;
1caccc25 CC	420
1caccc25 CC	421	/* ROG key */
a93913e1	422	case 0x38: asus_map_key_clear(KEY_PROG1); break;
1caccc25 CC	423
1caccc25 CC	424	/* Fn+C ASUS Splendid */
a93913e1	425	case 0xba: asus_map_key_clear(KEY_PROG2); break;
1caccc25 CC	426
1caccc25 CC	427	/* Fn+Space Power4Gear Hybrid */
a93913e1	428	case 0x5c: asus_map_key_clear(KEY_PROG3); break;
1caccc25 CC	429
1caccc25 CC	430	default:
0485b1ec MH	431	/* ASUS lazily declares 256 usages, ignore the rest,
	432	* as some make the keyboard appear as a pointer device. */
	433	return -1;
1caccc25	434	}
af22a610 CC	435
	436	/*
	437	* Check and enable backlight only on devices with UsagePage ==
	438	* 0xff31 to avoid initializing the keyboard firmware multiple
	439	* times on devices with multiple HID descriptors but same
	440	* PID/VID.
	441	*/
	442	if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
	443	drvdata->enable_backlight = true;
	444
1caccc25 CC	445	return 1;
	446	}
	447
5be91803 DD	448	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
	449	set_bit(EV_REP, hi->input->evbit);
	450	switch (usage->hid & HID_USAGE) {
	451	case 0xff01: asus_map_key_clear(BTN_1); break;
	452	case 0xff02: asus_map_key_clear(BTN_2); break;
	453	case 0xff03: asus_map_key_clear(BTN_3); break;
	454	case 0xff04: asus_map_key_clear(BTN_4); break;
	455	case 0xff05: asus_map_key_clear(BTN_5); break;
	456	case 0xff06: asus_map_key_clear(BTN_6); break;
	457	case 0xff07: asus_map_key_clear(BTN_7); break;
	458	case 0xff08: asus_map_key_clear(BTN_8); break;
	459	case 0xff09: asus_map_key_clear(BTN_9); break;
	460	case 0xff0a: asus_map_key_clear(BTN_A); break;
	461	case 0xff0b: asus_map_key_clear(BTN_B); break;
	462	case 0x00f1: asus_map_key_clear(KEY_WLAN); break;
	463	case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN); break;
	464	case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP); break;
	465	case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF); break;
	466	case 0x00f7: asus_map_key_clear(KEY_CAMERA); break;
	467	case 0x00f8: asus_map_key_clear(KEY_PROG1); break;
	468	default:
	469	return 0;
	470	}
	471
	472	return 1;
	473	}
	474
0485b1ec MH	475	if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
	476	(usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
	477	switch (usage->hid & HID_USAGE) {
	478	case 0xe2: /* Mute */
	479	case 0xe9: /* Volume up */
	480	case 0xea: /* Volume down */
	481	return 0;
	482	default:
	483	/* Ignore dummy Consumer usages which make the
	484	* keyboard incorrectly appear as a pointer device.
	485	*/
	486	return -1;
	487	}
	488	}
	489
9ce12d8b BM	490	return 0;
	491	}
	492
	493	static int asus_start_multitouch(struct hid_device *hdev)
	494	{
	495	int ret;
	496	const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
	497	unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
	498
	499	if (!dmabuf) {
	500	ret = -ENOMEM;
	501	hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
	502	return ret;
	503	}
	504
	505	ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
	506	HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
	507
	508	kfree(dmabuf);
	509
	510	if (ret != sizeof(buf)) {
	511	hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
	512	return ret;
	513	}
	514
	515	return 0;
	516	}
	517
	518	static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
	519	{
	520	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
	521
c81760b9	522	if (drvdata->tp)
9ce12d8b BM	523	return asus_start_multitouch(hdev);
	524
	525	return 0;
	526	}
	527
	528	static int asus_probe(struct hid_device hdev, const struct hid_device_id id)
	529	{
	530	int ret;
	531	struct asus_drvdata *drvdata;
	532
	533	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
	534	if (drvdata == NULL) {
	535	hid_err(hdev, "Can't alloc Asus descriptor\n");
	536	return -ENOMEM;
	537	}
	538
	539	hid_set_drvdata(hdev, drvdata);
	540
	541	drvdata->quirks = id->driver_data;
	542
c81760b9 HG	543	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
	544	drvdata->tp = &asus_i2c_tp;
	545
57573c54 HG	546	if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
	547	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	548
c81760b9 HG	549	if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
	550	drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
	551	drvdata->tp = &asus_t100ta_tp;
	552	}
57573c54 HG	553	}
57573c54 HG	554
9ce12d8b BM	555	if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
	556	hdev->quirks \|= HID_QUIRK_NO_INIT_REPORTS;
	557
	558	ret = hid_parse(hdev);
	559	if (ret) {
	560	hid_err(hdev, "Asus hid parse failed: %d\n", ret);
	561	return ret;
	562	}
	563
	564	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	565	if (ret) {
	566	hid_err(hdev, "Asus hw start failed: %d\n", ret);
	567	return ret;
	568	}
	569
	570	if (!drvdata->input) {
	571	hid_err(hdev, "Asus input not registered\n");
	572	ret = -ENOMEM;
	573	goto err_stop_hw;
	574	}
	575
c81760b9	576	if (drvdata->tp) {
c8b1b3dd BM	577	drvdata->input->name = "Asus TouchPad";
	578	} else {
	579	drvdata->input->name = "Asus Keyboard";
	580	}
9ce12d8b	581
c81760b9	582	if (drvdata->tp) {
9ce12d8b BM	583	ret = asus_start_multitouch(hdev);
	584	if (ret)
	585	goto err_stop_hw;
	586	}
	587
	588	return 0;
	589	err_stop_hw:
	590	hid_hw_stop(hdev);
	591	return ret;
	592	}
	593
af22a610 CC	594	static void asus_remove(struct hid_device *hdev)
	595	{
	596	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
	597
	598	if (drvdata->kbd_backlight) {
	599	drvdata->kbd_backlight->removed = true;
	600	cancel_work_sync(&drvdata->kbd_backlight->work);
	601	}
715e944f CC	602
715e944f CC	603	hid_hw_stop(hdev);
af22a610 CC	604	}
af22a610 CC	605
eeb01a57 YF	606	static __u8 asus_report_fixup(struct hid_device hdev, __u8 *rdesc,
	607	unsigned int *rsize)
	608	{
9ce12d8b BM	609	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
	610
	611	if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
	612	*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
b94f7d5d	613	hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
eeb01a57 YF	614	rdesc[55] = 0xdd;
eeb01a57 YF	615	}
76dd1fbe HG	616	if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
	617	*rsize == 76 && rdesc[73] == 0x81 && rdesc[74] == 0x01) {
	618	hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
	619	rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
	620	}
	621
eeb01a57 YF	622	return rdesc;
	623	}
	624
	625	static const struct hid_device_id asus_devices[] = {
9ce12d8b	626	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
a93913e1	627	USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
9ce12d8b	628	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
c81760b9	629	USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
1caccc25 CC	630	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
	631	USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) },
	632	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
af22a610	633	USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
76dd1fbe HG	634	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
	635	USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD),
	636	QUIRK_T100_KEYBOARD \| QUIRK_NO_CONSUMER_USAGES },
5be91803	637	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
38b2d78c	638	{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
5be91803	639	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
eeb01a57 YF	640	{ }
	641	};
	642	MODULE_DEVICE_TABLE(hid, asus_devices);
	643
	644	static struct hid_driver asus_driver = {
9ce12d8b BM	645	.name = "asus",
	646	.id_table = asus_devices,
	647	.report_fixup = asus_report_fixup,
	648	.probe = asus_probe,
af22a610	649	.remove = asus_remove,
9ce12d8b BM	650	.input_mapping = asus_input_mapping,
	651	.input_configured = asus_input_configured,
	652	#ifdef CONFIG_PM
	653	.reset_resume = asus_reset_resume,
	654	#endif
	655	.raw_event = asus_raw_event
eeb01a57 YF	656	};
	657	module_hid_driver(asus_driver);
	658
	659	MODULE_LICENSE("GPL");