[mirror_ubuntu-artful-kernel.git] / drivers / hid / hid-lenovo-tpkbd.c

/*
 *  HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
 *
 *  Copyright (c) 2012 Bernhard Seibold
 */

/*
 * 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/module.h>
#include <linux/sysfs.h>
#include <linux/device.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/leds.h>
#include "usbhid/usbhid.h"

#include "hid-ids.h"

/* This is only used for the trackpoint part of the driver, hence _tp */
struct tpkbd_data_pointer {
	int led_state;
	struct led_classdev led_mute;
	struct led_classdev led_micmute;
	int press_to_select;
	int dragging;
	int release_to_select;
	int select_right;
	int sensitivity;
	int press_speed;
};

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

static int tpkbd_input_mapping(struct hid_device *hdev,
		struct hid_input *hi, struct hid_field *field,
		struct hid_usage *usage, unsigned long **bit, int *max)
{
	struct usbhid_device *uhdev;

	uhdev = (struct usbhid_device *) hdev->driver_data;
	if (uhdev->ifnum == 1 && usage->hid == (HID_UP_BUTTON | 0x0010)) {
		map_key_clear(KEY_MICMUTE);
		return 1;
	}
	return 0;
}

#undef map_key_clear

static int tpkbd_features_set(struct hid_device *hdev)
{
	struct hid_report *report;
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[4];

	report->field[0]->value[0]  = data_pointer->press_to_select   ? 0x01 : 0x02;
	report->field[0]->value[0] |= data_pointer->dragging          ? 0x04 : 0x08;
	report->field[0]->value[0] |= data_pointer->release_to_select ? 0x10 : 0x20;
	report->field[0]->value[0] |= data_pointer->select_right      ? 0x80 : 0x40;
	report->field[1]->value[0] = 0x03; // unknown setting, imitate windows driver
	report->field[2]->value[0] = data_pointer->sensitivity;
	report->field[3]->value[0] = data_pointer->press_speed;

	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
	return 0;
}

static ssize_t pointer_press_to_select_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
}

static ssize_t pointer_press_to_select_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value))
		return -EINVAL;
	if (value < 0 || value > 1)
		return -EINVAL;

	data_pointer->press_to_select = value;
	tpkbd_features_set(hdev);

	return count;
}

static ssize_t pointer_dragging_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
}

static ssize_t pointer_dragging_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value))
		return -EINVAL;
	if (value < 0 || value > 1)
		return -EINVAL;

	data_pointer->dragging = value;
	tpkbd_features_set(hdev);

	return count;
}

static ssize_t pointer_release_to_select_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
}

static ssize_t pointer_release_to_select_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value))
		return -EINVAL;
	if (value < 0 || value > 1)
		return -EINVAL;

	data_pointer->release_to_select = value;
	tpkbd_features_set(hdev);

	return count;
}

static ssize_t pointer_select_right_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
}

static ssize_t pointer_select_right_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value))
		return -EINVAL;
	if (value < 0 || value > 1)
		return -EINVAL;

	data_pointer->select_right = value;
	tpkbd_features_set(hdev);

	return count;
}

static ssize_t pointer_sensitivity_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
		data_pointer->sensitivity);
}

static ssize_t pointer_sensitivity_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
		return -EINVAL;

	data_pointer->sensitivity = value;
	tpkbd_features_set(hdev);

	return count;
}

static ssize_t pointer_press_speed_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
		data_pointer->press_speed);
}

static ssize_t pointer_press_speed_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int value;

	if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
		return -EINVAL;

	data_pointer->press_speed = value;
	tpkbd_features_set(hdev);

	return count;
}

static struct device_attribute dev_attr_pointer_press_to_select =
	__ATTR(press_to_select, S_IWUSR | S_IRUGO,
			pointer_press_to_select_show,
			pointer_press_to_select_store);

static struct device_attribute dev_attr_pointer_dragging =
	__ATTR(dragging, S_IWUSR | S_IRUGO,
			pointer_dragging_show,
			pointer_dragging_store);

static struct device_attribute dev_attr_pointer_release_to_select =
	__ATTR(release_to_select, S_IWUSR | S_IRUGO,
			pointer_release_to_select_show,
			pointer_release_to_select_store);

static struct device_attribute dev_attr_pointer_select_right =
	__ATTR(select_right, S_IWUSR | S_IRUGO,
			pointer_select_right_show,
			pointer_select_right_store);

static struct device_attribute dev_attr_pointer_sensitivity =
	__ATTR(sensitivity, S_IWUSR | S_IRUGO,
			pointer_sensitivity_show,
			pointer_sensitivity_store);

static struct device_attribute dev_attr_pointer_press_speed =
	__ATTR(press_speed, S_IWUSR | S_IRUGO,
			pointer_press_speed_show,
			pointer_press_speed_store);

static struct attribute *tpkbd_attributes_pointer[] = {
	&dev_attr_pointer_press_to_select.attr,
	&dev_attr_pointer_dragging.attr,
	&dev_attr_pointer_release_to_select.attr,
	&dev_attr_pointer_select_right.attr,
	&dev_attr_pointer_sensitivity.attr,
	&dev_attr_pointer_press_speed.attr,
	NULL
};

static const struct attribute_group tpkbd_attr_group_pointer = {
	.attrs = tpkbd_attributes_pointer,
};

static enum led_brightness tpkbd_led_brightness_get(
			struct led_classdev *led_cdev)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	int led_nr = 0;

	if (led_cdev == &data_pointer->led_micmute)
		led_nr = 1;

	return data_pointer->led_state & (1 << led_nr)
				? LED_FULL
				: LED_OFF;
}

static void tpkbd_led_brightness_set(struct led_classdev *led_cdev,
			enum led_brightness value)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
	struct hid_report *report;
	int led_nr = 0;

	if (led_cdev == &data_pointer->led_micmute)
		led_nr = 1;

	if (value == LED_OFF)
		data_pointer->led_state &= ~(1 << led_nr);
	else
		data_pointer->led_state |= 1 << led_nr;

	report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[3];
	report->field[0]->value[0] = (data_pointer->led_state >> 0) & 1;
	report->field[0]->value[1] = (data_pointer->led_state >> 1) & 1;
	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
}

static int tpkbd_probe_tp(struct hid_device *hdev)
{
	struct device *dev = &hdev->dev;
	struct tpkbd_data_pointer *data_pointer;
	size_t name_sz = strlen(dev_name(dev)) + 16;
	char *name_mute, *name_micmute;
	int i, ret;

	/* Validate required reports. */
	for (i = 0; i < 4; i++) {
		if (!hid_validate_values(hdev, HID_FEATURE_REPORT, 4, i, 1))
			return -ENODEV;
	}
	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 3, 0, 2))
		return -ENODEV;

	if (sysfs_create_group(&hdev->dev.kobj,
				&tpkbd_attr_group_pointer)) {
		hid_warn(hdev, "Could not create sysfs group\n");
	}

	data_pointer = kzalloc(sizeof(struct tpkbd_data_pointer), GFP_KERNEL);
	if (data_pointer == NULL) {
		hid_err(hdev, "Could not allocate memory for driver data\n");
		return -ENOMEM;
	}

	// set same default values as windows driver
	data_pointer->sensitivity = 0xa0;
	data_pointer->press_speed = 0x38;

	name_mute = kzalloc(name_sz, GFP_KERNEL);
	if (name_mute == NULL) {
		hid_err(hdev, "Could not allocate memory for led data\n");
		ret = -ENOMEM;
		goto err;
	}
	snprintf(name_mute, name_sz, "%s:amber:mute", dev_name(dev));

	name_micmute = kzalloc(name_sz, GFP_KERNEL);
	if (name_micmute == NULL) {
		hid_err(hdev, "Could not allocate memory for led data\n");
		ret = -ENOMEM;
		goto err2;
	}
	snprintf(name_micmute, name_sz, "%s:amber:micmute", dev_name(dev));

	hid_set_drvdata(hdev, data_pointer);

	data_pointer->led_mute.name = name_mute;
	data_pointer->led_mute.brightness_get = tpkbd_led_brightness_get;
	data_pointer->led_mute.brightness_set = tpkbd_led_brightness_set;
	data_pointer->led_mute.dev = dev;
	led_classdev_register(dev, &data_pointer->led_mute);

	data_pointer->led_micmute.name = name_micmute;
	data_pointer->led_micmute.brightness_get = tpkbd_led_brightness_get;
	data_pointer->led_micmute.brightness_set = tpkbd_led_brightness_set;
	data_pointer->led_micmute.dev = dev;
	led_classdev_register(dev, &data_pointer->led_micmute);

	tpkbd_features_set(hdev);

	return 0;

err2:
	kfree(name_mute);
err:
	kfree(data_pointer);
	return ret;
}

static int tpkbd_probe(struct hid_device *hdev,
		const struct hid_device_id *id)
{
	int ret;
	struct usbhid_device *uhdev;

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "hid_parse failed\n");
		goto err;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "hid_hw_start failed\n");
		goto err;
	}

	uhdev = (struct usbhid_device *) hdev->driver_data;

	if (uhdev->ifnum == 1) {
		ret = tpkbd_probe_tp(hdev);
		if (ret)
			goto err_hid;
	}

	return 0;
err_hid:
	hid_hw_stop(hdev);
err:
	return ret;
}

static void tpkbd_remove_tp(struct hid_device *hdev)
{
	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);

	sysfs_remove_group(&hdev->dev.kobj,
			&tpkbd_attr_group_pointer);

	led_classdev_unregister(&data_pointer->led_micmute);
	led_classdev_unregister(&data_pointer->led_mute);

	hid_set_drvdata(hdev, NULL);
	kfree(data_pointer->led_micmute.name);
	kfree(data_pointer->led_mute.name);
	kfree(data_pointer);
}

static void tpkbd_remove(struct hid_device *hdev)
{
	struct usbhid_device *uhdev;

	uhdev = (struct usbhid_device *) hdev->driver_data;
	if (uhdev->ifnum == 1)
		tpkbd_remove_tp(hdev);

	hid_hw_stop(hdev);
}

static const struct hid_device_id tpkbd_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
	{ }
};

MODULE_DEVICE_TABLE(hid, tpkbd_devices);

static struct hid_driver tpkbd_driver = {
	.name = "lenovo_tpkbd",
	.id_table = tpkbd_devices,
	.input_mapping = tpkbd_input_mapping,
	.probe = tpkbd_probe,
	.remove = tpkbd_remove,
};
module_hid_driver(tpkbd_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
c1dcad2d BS	1	/*
	2	* HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
	3	*
	4	* Copyright (c) 2012 Bernhard Seibold
	5	*/
	6
	7	/*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the Free
	10	* Software Foundation; either version 2 of the License, or (at your option)
	11	* any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/sysfs.h>
	16	#include <linux/device.h>
	17	#include <linux/usb.h>
	18	#include <linux/hid.h>
	19	#include <linux/input.h>
	20	#include <linux/leds.h>
	21	#include "usbhid/usbhid.h"
	22
	23	#include "hid-ids.h"
	24
	25	/* This is only used for the trackpoint part of the driver, hence _tp */
	26	struct tpkbd_data_pointer {
	27	int led_state;
	28	struct led_classdev led_mute;
	29	struct led_classdev led_micmute;
	30	int press_to_select;
	31	int dragging;
	32	int release_to_select;
	33	int select_right;
	34	int sensitivity;
	35	int press_speed;
	36	};
	37
	38	#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
	39
	40	static int tpkbd_input_mapping(struct hid_device *hdev,
	41	struct hid_input hi, struct hid_field field,
	42	struct hid_usage usage, unsigned long bit, int max)
	43	{
	44	struct usbhid_device *uhdev;
	45
	46	uhdev = (struct usbhid_device *) hdev->driver_data;
	47	if (uhdev->ifnum == 1 && usage->hid == (HID_UP_BUTTON \| 0x0010)) {
	48	map_key_clear(KEY_MICMUTE);
	49	return 1;
	50	}
	51	return 0;
	52	}
	53
	54	#undef map_key_clear
	55
	56	static int tpkbd_features_set(struct hid_device *hdev)
	57	{
	58	struct hid_report *report;
832fbeae	59	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d	60
c1dcad2d BS	61	report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[4];
	62
	63	report->field[0]->value[0] = data_pointer->press_to_select ? 0x01 : 0x02;
	64	report->field[0]->value[0] \|= data_pointer->dragging ? 0x04 : 0x08;
	65	report->field[0]->value[0] \|= data_pointer->release_to_select ? 0x10 : 0x20;
	66	report->field[0]->value[0] \|= data_pointer->select_right ? 0x80 : 0x40;
	67	report->field[1]->value[0] = 0x03; // unknown setting, imitate windows driver
	68	report->field[2]->value[0] = data_pointer->sensitivity;
	69	report->field[3]->value[0] = data_pointer->press_speed;
	70
d8814272	71	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
c1dcad2d BS	72	return 0;
	73	}
	74
	75	static ssize_t pointer_press_to_select_show(struct device *dev,
	76	struct device_attribute *attr,
	77	char *buf)
	78	{
832fbeae AL	79	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	80	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	81
	82	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
	83	}
	84
	85	static ssize_t pointer_press_to_select_store(struct device *dev,
	86	struct device_attribute *attr,
	87	const char *buf,
	88	size_t count)
	89	{
832fbeae AL	90	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	91	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	92	int value;
c1dcad2d BS	93
c1dcad2d BS	94	if (kstrtoint(buf, 10, &value))
	95	return -EINVAL;
	96	if (value < 0 \|\| value > 1)
	97	return -EINVAL;
	98
	99	data_pointer->press_to_select = value;
	100	tpkbd_features_set(hdev);
	101
	102	return count;
	103	}
	104
	105	static ssize_t pointer_dragging_show(struct device *dev,
	106	struct device_attribute *attr,
	107	char *buf)
	108	{
832fbeae AL	109	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	110	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	111
	112	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
	113	}
	114
	115	static ssize_t pointer_dragging_store(struct device *dev,
	116	struct device_attribute *attr,
	117	const char *buf,
	118	size_t count)
	119	{
832fbeae AL	120	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	121	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	122	int value;
c1dcad2d BS	123
c1dcad2d BS	124	if (kstrtoint(buf, 10, &value))
	125	return -EINVAL;
	126	if (value < 0 \|\| value > 1)
	127	return -EINVAL;
	128
	129	data_pointer->dragging = value;
	130	tpkbd_features_set(hdev);
	131
	132	return count;
	133	}
	134
	135	static ssize_t pointer_release_to_select_show(struct device *dev,
	136	struct device_attribute *attr,
	137	char *buf)
	138	{
832fbeae AL	139	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	140	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	141
	142	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
	143	}
	144
	145	static ssize_t pointer_release_to_select_store(struct device *dev,
	146	struct device_attribute *attr,
	147	const char *buf,
	148	size_t count)
	149	{
832fbeae AL	150	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	151	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	152	int value;
c1dcad2d BS	153
c1dcad2d BS	154	if (kstrtoint(buf, 10, &value))
	155	return -EINVAL;
	156	if (value < 0 \|\| value > 1)
	157	return -EINVAL;
	158
	159	data_pointer->release_to_select = value;
	160	tpkbd_features_set(hdev);
	161
	162	return count;
	163	}
	164
	165	static ssize_t pointer_select_right_show(struct device *dev,
	166	struct device_attribute *attr,
	167	char *buf)
	168	{
832fbeae AL	169	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	170	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	171
	172	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
	173	}
	174
	175	static ssize_t pointer_select_right_store(struct device *dev,
	176	struct device_attribute *attr,
	177	const char *buf,
	178	size_t count)
	179	{
832fbeae AL	180	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	181	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	182	int value;
c1dcad2d BS	183
c1dcad2d BS	184	if (kstrtoint(buf, 10, &value))
	185	return -EINVAL;
	186	if (value < 0 \|\| value > 1)
	187	return -EINVAL;
	188
	189	data_pointer->select_right = value;
	190	tpkbd_features_set(hdev);
	191
	192	return count;
	193	}
	194
	195	static ssize_t pointer_sensitivity_show(struct device *dev,
	196	struct device_attribute *attr,
	197	char *buf)
	198	{
832fbeae AL	199	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	200	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	201
	202	return snprintf(buf, PAGE_SIZE, "%u\n",
	203	data_pointer->sensitivity);
	204	}
	205
	206	static ssize_t pointer_sensitivity_store(struct device *dev,
	207	struct device_attribute *attr,
	208	const char *buf,
	209	size_t count)
	210	{
832fbeae AL	211	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	212	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	213	int value;
c1dcad2d BS	214
c1dcad2d BS	215	if (kstrtoint(buf, 10, &value) \|\| value < 1 \|\| value > 255)
	216	return -EINVAL;
	217
	218	data_pointer->sensitivity = value;
	219	tpkbd_features_set(hdev);
	220
	221	return count;
	222	}
	223
	224	static ssize_t pointer_press_speed_show(struct device *dev,
	225	struct device_attribute *attr,
	226	char *buf)
	227	{
832fbeae AL	228	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	229	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d	230
c1dcad2d BS	231	return snprintf(buf, PAGE_SIZE, "%u\n",
	232	data_pointer->press_speed);
	233	}
	234
	235	static ssize_t pointer_press_speed_store(struct device *dev,
	236	struct device_attribute *attr,
	237	const char *buf,
	238	size_t count)
	239	{
832fbeae AL	240	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
832fbeae AL	241	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	242	int value;
c1dcad2d BS	243
c1dcad2d BS	244	if (kstrtoint(buf, 10, &value) \|\| value < 1 \|\| value > 255)
	245	return -EINVAL;
	246
	247	data_pointer->press_speed = value;
	248	tpkbd_features_set(hdev);
	249
	250	return count;
	251	}
	252
	253	static struct device_attribute dev_attr_pointer_press_to_select =
	254	__ATTR(press_to_select, S_IWUSR \| S_IRUGO,
	255	pointer_press_to_select_show,
	256	pointer_press_to_select_store);
	257
	258	static struct device_attribute dev_attr_pointer_dragging =
	259	__ATTR(dragging, S_IWUSR \| S_IRUGO,
	260	pointer_dragging_show,
	261	pointer_dragging_store);
	262
	263	static struct device_attribute dev_attr_pointer_release_to_select =
	264	__ATTR(release_to_select, S_IWUSR \| S_IRUGO,
	265	pointer_release_to_select_show,
	266	pointer_release_to_select_store);
	267
	268	static struct device_attribute dev_attr_pointer_select_right =
	269	__ATTR(select_right, S_IWUSR \| S_IRUGO,
	270	pointer_select_right_show,
	271	pointer_select_right_store);
	272
	273	static struct device_attribute dev_attr_pointer_sensitivity =
	274	__ATTR(sensitivity, S_IWUSR \| S_IRUGO,
	275	pointer_sensitivity_show,
	276	pointer_sensitivity_store);
	277
	278	static struct device_attribute dev_attr_pointer_press_speed =
	279	__ATTR(press_speed, S_IWUSR \| S_IRUGO,
	280	pointer_press_speed_show,
	281	pointer_press_speed_store);
	282
	283	static struct attribute *tpkbd_attributes_pointer[] = {
	284	&dev_attr_pointer_press_to_select.attr,
	285	&dev_attr_pointer_dragging.attr,
	286	&dev_attr_pointer_release_to_select.attr,
	287	&dev_attr_pointer_select_right.attr,
	288	&dev_attr_pointer_sensitivity.attr,
	289	&dev_attr_pointer_press_speed.attr,
	290	NULL
	291	};
	292
	293	static const struct attribute_group tpkbd_attr_group_pointer = {
	294	.attrs = tpkbd_attributes_pointer,
	295	};
	296
	297	static enum led_brightness tpkbd_led_brightness_get(
	298	struct led_classdev *led_cdev)
	299	{
832fbeae AL	300	struct device *dev = led_cdev->dev->parent;
	301	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	302	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	303	int led_nr = 0;
c1dcad2d BS	304
c1dcad2d BS	305	if (led_cdev == &data_pointer->led_micmute)
	306	led_nr = 1;
	307
	308	return data_pointer->led_state & (1 << led_nr)
	309	? LED_FULL
	310	: LED_OFF;
	311	}
	312
	313	static void tpkbd_led_brightness_set(struct led_classdev *led_cdev,
	314	enum led_brightness value)
	315	{
832fbeae AL	316	struct device *dev = led_cdev->dev->parent;
	317	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	318	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d	319	struct hid_report *report;
c1dcad2d BS	320	int led_nr = 0;
c1dcad2d BS	321
c1dcad2d BS	322	if (led_cdev == &data_pointer->led_micmute)
	323	led_nr = 1;
	324
	325	if (value == LED_OFF)
	326	data_pointer->led_state &= ~(1 << led_nr);
	327	else
	328	data_pointer->led_state \|= 1 << led_nr;
	329
	330	report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[3];
	331	report->field[0]->value[0] = (data_pointer->led_state >> 0) & 1;
	332	report->field[0]->value[1] = (data_pointer->led_state >> 1) & 1;
d8814272	333	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
c1dcad2d BS	334	}
	335
	336	static int tpkbd_probe_tp(struct hid_device *hdev)
	337	{
	338	struct device *dev = &hdev->dev;
	339	struct tpkbd_data_pointer *data_pointer;
	340	size_t name_sz = strlen(dev_name(dev)) + 16;
	341	char name_mute, name_micmute;
0a9cd0a8 KC	342	int i, ret;
	343
	344	/* Validate required reports. */
	345	for (i = 0; i < 4; i++) {
	346	if (!hid_validate_values(hdev, HID_FEATURE_REPORT, 4, i, 1))
	347	return -ENODEV;
	348	}
	349	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 3, 0, 2))
	350	return -ENODEV;
c1dcad2d BS	351
	352	if (sysfs_create_group(&hdev->dev.kobj,
	353	&tpkbd_attr_group_pointer)) {
	354	hid_warn(hdev, "Could not create sysfs group\n");
	355	}
	356
	357	data_pointer = kzalloc(sizeof(struct tpkbd_data_pointer), GFP_KERNEL);
	358	if (data_pointer == NULL) {
	359	hid_err(hdev, "Could not allocate memory for driver data\n");
	360	return -ENOMEM;
	361	}
	362
	363	// set same default values as windows driver
	364	data_pointer->sensitivity = 0xa0;
	365	data_pointer->press_speed = 0x38;
	366
	367	name_mute = kzalloc(name_sz, GFP_KERNEL);
	368	if (name_mute == NULL) {
	369	hid_err(hdev, "Could not allocate memory for led data\n");
	370	ret = -ENOMEM;
	371	goto err;
	372	}
	373	snprintf(name_mute, name_sz, "%s:amber:mute", dev_name(dev));
	374
	375	name_micmute = kzalloc(name_sz, GFP_KERNEL);
	376	if (name_micmute == NULL) {
	377	hid_err(hdev, "Could not allocate memory for led data\n");
	378	ret = -ENOMEM;
	379	goto err2;
	380	}
	381	snprintf(name_micmute, name_sz, "%s:amber:micmute", dev_name(dev));
	382
	383	hid_set_drvdata(hdev, data_pointer);
	384
	385	data_pointer->led_mute.name = name_mute;
	386	data_pointer->led_mute.brightness_get = tpkbd_led_brightness_get;
	387	data_pointer->led_mute.brightness_set = tpkbd_led_brightness_set;
	388	data_pointer->led_mute.dev = dev;
	389	led_classdev_register(dev, &data_pointer->led_mute);
	390
	391	data_pointer->led_micmute.name = name_micmute;
	392	data_pointer->led_micmute.brightness_get = tpkbd_led_brightness_get;
	393	data_pointer->led_micmute.brightness_set = tpkbd_led_brightness_set;
	394	data_pointer->led_micmute.dev = dev;
	395	led_classdev_register(dev, &data_pointer->led_micmute);
	396
	397	tpkbd_features_set(hdev);
	398
	399	return 0;
	400
	401	err2:
	402	kfree(name_mute);
	403	err:
	404	kfree(data_pointer);
	405	return ret;
	406	}
	407
	408	static int tpkbd_probe(struct hid_device *hdev,
	409	const struct hid_device_id *id)
	410	{
	411	int ret;
	412	struct usbhid_device *uhdev;
	413
	414	ret = hid_parse(hdev);
415	if (ret) {
416	hid_err(hdev, "hid_parse failed\n");
0ccdd9e7	417	goto err;
c1dcad2d BS	418	}
	419
	420	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	421	if (ret) {
	422	hid_err(hdev, "hid_hw_start failed\n");
0ccdd9e7	423	goto err;
c1dcad2d BS	424	}
	425
	426	uhdev = (struct usbhid_device *) hdev->driver_data;
	427
0ccdd9e7 BT	428	if (uhdev->ifnum == 1) {
	429	ret = tpkbd_probe_tp(hdev);
	430	if (ret)
	431	goto err_hid;
	432	}
c1dcad2d BS	433
c1dcad2d BS	434	return 0;
0ccdd9e7 BT	435	err_hid:
	436	hid_hw_stop(hdev);
	437	err:
c1dcad2d BS	438	return ret;
	439	}
	440
	441	static void tpkbd_remove_tp(struct hid_device *hdev)
	442	{
832fbeae	443	struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
c1dcad2d BS	444
	445	sysfs_remove_group(&hdev->dev.kobj,
	446	&tpkbd_attr_group_pointer);
	447
c1dcad2d BS	448	led_classdev_unregister(&data_pointer->led_micmute);
	449	led_classdev_unregister(&data_pointer->led_mute);
	450
	451	hid_set_drvdata(hdev, NULL);
39149980 AL	452	kfree(data_pointer->led_micmute.name);
39149980 AL	453	kfree(data_pointer->led_mute.name);
c1dcad2d BS	454	kfree(data_pointer);
	455	}
	456
	457	static void tpkbd_remove(struct hid_device *hdev)
	458	{
	459	struct usbhid_device *uhdev;
	460
	461	uhdev = (struct usbhid_device *) hdev->driver_data;
	462	if (uhdev->ifnum == 1)
	463	tpkbd_remove_tp(hdev);
	464
	465	hid_hw_stop(hdev);
	466	}
	467
	468	static const struct hid_device_id tpkbd_devices[] = {
	469	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
	470	{ }
	471	};
	472
	473	MODULE_DEVICE_TABLE(hid, tpkbd_devices);
	474
	475	static struct hid_driver tpkbd_driver = {
	476	.name = "lenovo_tpkbd",
	477	.id_table = tpkbd_devices,
	478	.input_mapping = tpkbd_input_mapping,
	479	.probe = tpkbd_probe,
	480	.remove = tpkbd_remove,
	481	};
f425458e	482	module_hid_driver(tpkbd_driver);
c1dcad2d BS	483
c1dcad2d BS	484	MODULE_LICENSE("GPL");