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

/*
 *  HID driver for Steelseries SRW-S1
 *
 *  Copyright (c) 2013 Simon Wood
 */

/*
 * 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/device.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/module.h>

#include "hid-ids.h"

#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
#define SRWS1_NUMBER_LEDS 15
struct steelseries_srws1_data {
	__u16 led_state;
	/* the last element is used for setting all leds simultaneously */
	struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
};
#endif

/* Fixed report descriptor for Steelseries SRW-S1 wheel controller
 *
 * The original descriptor hides the sensitivity and assists dials
 * a custom vendor usage page. This inserts a patch to make them
 * appear in the 'Generic Desktop' usage.
 */

static __u8 steelseries_srws1_rdesc_fixed[] = {
0x05, 0x01,         /*  Usage Page (Desktop)                */
0x09, 0x08,         /*  Usage (MultiAxis), Changed          */
0xA1, 0x01,         /*  Collection (Application),           */
0xA1, 0x02,         /*      Collection (Logical),           */
0x95, 0x01,         /*          Report Count (1),           */
0x05, 0x01,         /* Changed  Usage Page (Desktop),       */
0x09, 0x30,         /* Changed  Usage (X),                  */
0x16, 0xF8, 0xF8,   /*          Logical Minimum (-1800),    */
0x26, 0x08, 0x07,   /*          Logical Maximum (1800),     */
0x65, 0x14,         /*          Unit (Degrees),             */
0x55, 0x0F,         /*          Unit Exponent (15),         */
0x75, 0x10,         /*          Report Size (16),           */
0x81, 0x02,         /*          Input (Variable),           */
0x09, 0x31,         /* Changed  Usage (Y),                  */
0x15, 0x00,         /*          Logical Minimum (0),        */
0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
0x75, 0x0C,         /*          Report Size (12),           */
0x81, 0x02,         /*          Input (Variable),           */
0x09, 0x32,         /* Changed  Usage (Z),                  */
0x15, 0x00,         /*          Logical Minimum (0),        */
0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
0x75, 0x0C,         /*          Report Size (12),           */
0x81, 0x02,         /*          Input (Variable),           */
0x05, 0x01,         /*          Usage Page (Desktop),       */
0x09, 0x39,         /*          Usage (Hat Switch),         */
0x25, 0x07,         /*          Logical Maximum (7),        */
0x35, 0x00,         /*          Physical Minimum (0),       */
0x46, 0x3B, 0x01,   /*          Physical Maximum (315),     */
0x65, 0x14,         /*          Unit (Degrees),             */
0x75, 0x04,         /*          Report Size (4),            */
0x95, 0x01,         /*          Report Count (1),           */
0x81, 0x02,         /*          Input (Variable),           */
0x25, 0x01,         /*          Logical Maximum (1),        */
0x45, 0x01,         /*          Physical Maximum (1),       */
0x65, 0x00,         /*          Unit,                       */
0x75, 0x01,         /*          Report Size (1),            */
0x95, 0x03,         /*          Report Count (3),           */
0x81, 0x01,         /*          Input (Constant),           */
0x05, 0x09,         /*          Usage Page (Button),        */
0x19, 0x01,         /*          Usage Minimum (01h),        */
0x29, 0x11,         /*          Usage Maximum (11h),        */
0x95, 0x11,         /*          Report Count (17),          */
0x81, 0x02,         /*          Input (Variable),           */
                    /*   ---- Dial patch starts here ----   */
0x05, 0x01,         /*          Usage Page (Desktop),       */
0x09, 0x33,         /*          Usage (RX),                 */
0x75, 0x04,         /*          Report Size (4),            */
0x95, 0x02,         /*          Report Count (2),           */
0x15, 0x00,         /*          Logical Minimum (0),        */
0x25, 0x0b,         /*          Logical Maximum (b),        */
0x81, 0x02,         /*          Input (Variable),           */
0x09, 0x35,         /*          Usage (RZ),                 */
0x75, 0x04,         /*          Report Size (4),            */
0x95, 0x01,         /*          Report Count (1),           */
0x25, 0x03,         /*          Logical Maximum (3),        */
0x81, 0x02,         /*          Input (Variable),           */
                    /*    ---- Dial patch ends here ----    */
0x06, 0x00, 0xFF,   /*          Usage Page (FF00h),         */
0x09, 0x01,         /*          Usage (01h),                */
0x75, 0x04,         /* Changed  Report Size (4),            */
0x95, 0x0D,         /* Changed  Report Count (13),          */
0x81, 0x02,         /*          Input (Variable),           */
0xC0,               /*      End Collection,                 */
0xA1, 0x02,         /*      Collection (Logical),           */
0x09, 0x02,         /*          Usage (02h),                */
0x75, 0x08,         /*          Report Size (8),            */
0x95, 0x10,         /*          Report Count (16),          */
0x91, 0x02,         /*          Output (Variable),          */
0xC0,               /*      End Collection,                 */
0xC0                /*  End Collection                      */
};

#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
{
	struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
	__s32 *value = report->field[0]->value;

	value[0] = 0x40;
	value[1] = leds & 0xFF;
	value[2] = leds >> 8;
	value[3] = 0x00;
	value[4] = 0x00;
	value[5] = 0x00;
	value[6] = 0x00;
	value[7] = 0x00;
	value[8] = 0x00;
	value[9] = 0x00;
	value[10] = 0x00;
	value[11] = 0x00;
	value[12] = 0x00;
	value[13] = 0x00;
	value[14] = 0x00;
	value[15] = 0x00;

	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);

	/* Note: LED change does not show on device until the device is read/polled */
}

static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
			enum led_brightness value)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);

	if (!drv_data) {
		hid_err(hid, "Device data not found.");
		return;
	}

	if (value == LED_OFF)
		drv_data->led_state = 0;
	else
		drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;

	steelseries_srws1_set_leds(hid, drv_data->led_state);
}

static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	struct steelseries_srws1_data *drv_data;

	drv_data = hid_get_drvdata(hid);

	if (!drv_data) {
		hid_err(hid, "Device data not found.");
		return LED_OFF;
	}

	return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
}

static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
			enum led_brightness value)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	int i, state = 0;

	if (!drv_data) {
		hid_err(hid, "Device data not found.");
		return;
	}

	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
		if (led_cdev != drv_data->led[i])
			continue;

		state = (drv_data->led_state >> i) & 1;
		if (value == LED_OFF && state) {
			drv_data->led_state &= ~(1 << i);
			steelseries_srws1_set_leds(hid, drv_data->led_state);
		} else if (value != LED_OFF && !state) {
			drv_data->led_state |= 1 << i;
			steelseries_srws1_set_leds(hid, drv_data->led_state);
		}
		break;
	}
}

static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
{
	struct device *dev = led_cdev->dev->parent;
	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	struct steelseries_srws1_data *drv_data;
	int i, value = 0;

	drv_data = hid_get_drvdata(hid);

	if (!drv_data) {
		hid_err(hid, "Device data not found.");
		return LED_OFF;
	}

	for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
		if (led_cdev == drv_data->led[i]) {
			value = (drv_data->led_state >> i) & 1;
			break;
		}

	return value ? LED_FULL : LED_OFF;
}

static int steelseries_srws1_probe(struct hid_device *hdev,
		const struct hid_device_id *id)
{
	int ret, i;
	struct led_classdev *led;
	size_t name_sz;
	char *name;

	struct steelseries_srws1_data *drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);

	if (drv_data == NULL) {
		hid_err(hdev, "can't alloc SRW-S1 memory\n");
		return -ENOMEM;
	}

	hid_set_drvdata(hdev, drv_data);

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

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

	/* register led subsystem */
	drv_data->led_state = 0;
	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
		drv_data->led[i] = NULL;

	steelseries_srws1_set_leds(hdev, 0);

	name_sz = strlen(hdev->uniq) + 16;

	/* 'ALL', for setting all LEDs simultaneously */
	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	if (!led) {
		hid_err(hdev, "can't allocate memory for LED ALL\n");
		goto err_led;
	}

	name = (void *)(&led[1]);
	snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
	led->name = name;
	led->brightness = 0;
	led->max_brightness = 1;
	led->brightness_get = steelseries_srws1_led_all_get_brightness;
	led->brightness_set = steelseries_srws1_led_all_set_brightness;

	drv_data->led[SRWS1_NUMBER_LEDS] = led;
	ret = led_classdev_register(&hdev->dev, led);
	if (ret)
		goto err_led;

	/* Each individual LED */
	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
		led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
		if (!led) {
			hid_err(hdev, "can't allocate memory for LED %d\n", i);
			goto err_led;
		}

		name = (void *)(&led[1]);
		snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
		led->name = name;
		led->brightness = 0;
		led->max_brightness = 1;
		led->brightness_get = steelseries_srws1_led_get_brightness;
		led->brightness_set = steelseries_srws1_led_set_brightness;

		drv_data->led[i] = led;
		ret = led_classdev_register(&hdev->dev, led);

		if (ret) {
			hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
err_led:
			/* Deregister all LEDs (if any) */
			for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
				led = drv_data->led[i];
				drv_data->led[i] = NULL;
				if (!led)
					continue;
				led_classdev_unregister(led);
				kfree(led);
			}
			goto out;	/* but let the driver continue without LEDs */
		}
	}
out:
	return 0;
err_free:
	kfree(drv_data);
	return ret;
}

static void steelseries_srws1_remove(struct hid_device *hdev)
{
	int i;
	struct led_classdev *led;

	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);

	if (drv_data) {
		/* Deregister LEDs (if any) */
		for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
			led = drv_data->led[i];
			drv_data->led[i] = NULL;
			if (!led)
				continue;
			led_classdev_unregister(led);
			kfree(led);
		}

	}

	hid_hw_stop(hdev);
	kfree(drv_data);
	return;
}
#endif

static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
			&& rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
		hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
		rdesc = steelseries_srws1_rdesc_fixed;
		*rsize = sizeof(steelseries_srws1_rdesc_fixed);
	}
	return rdesc;
}

static const struct hid_device_id steelseries_srws1_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
	{ }
};
MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);

static struct hid_driver steelseries_srws1_driver = {
	.name = "steelseries_srws1",
	.id_table = steelseries_srws1_devices,
#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
	.probe = steelseries_srws1_probe,
	.remove = steelseries_srws1_remove,
#endif
	.report_fixup = steelseries_srws1_report_fixup
};

module_hid_driver(steelseries_srws1_driver);
MODULE_LICENSE("GPL");
Commit	Line	Data
75dbb953 SW	1	/*
	2	* HID driver for Steelseries SRW-S1
	3	*
	4	* Copyright (c) 2013 Simon Wood
	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/device.h>
2e2daff3	15	#include <linux/usb.h>
75dbb953 SW	16	#include <linux/hid.h>
	17	#include <linux/module.h>
	18
	19	#include "hid-ids.h"
	20
b52b5061 SW	21	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	22	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	23	#define SRWS1_NUMBER_LEDS 15
	24	struct steelseries_srws1_data {
	25	__u16 led_state;
7e415762 JK	26	/* the last element is used for setting all leds simultaneously */
7e415762 JK	27	struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
2e2daff3 SW	28	};
	29	#endif
	30
5492606d SW	31	/* Fixed report descriptor for Steelseries SRW-S1 wheel controller
	32	*
	33	* The original descriptor hides the sensitivity and assists dials
	34	* a custom vendor usage page. This inserts a patch to make them
	35	* appear in the 'Generic Desktop' usage.
	36	*/
	37
	38	static __u8 steelseries_srws1_rdesc_fixed[] = {
	39	0x05, 0x01, /* Usage Page (Desktop) */
	40	0x09, 0x08, /* Usage (MultiAxis), Changed */
	41	0xA1, 0x01, /* Collection (Application), */
	42	0xA1, 0x02, /* Collection (Logical), */
	43	0x95, 0x01, /* Report Count (1), */
	44	0x05, 0x01, /* Changed Usage Page (Desktop), */
	45	0x09, 0x30, /* Changed Usage (X), */
	46	0x16, 0xF8, 0xF8, /* Logical Minimum (-1800), */
	47	0x26, 0x08, 0x07, /* Logical Maximum (1800), */
	48	0x65, 0x14, /* Unit (Degrees), */
	49	0x55, 0x0F, /* Unit Exponent (15), */
	50	0x75, 0x10, /* Report Size (16), */
	51	0x81, 0x02, /* Input (Variable), */
	52	0x09, 0x31, /* Changed Usage (Y), */
	53	0x15, 0x00, /* Logical Minimum (0), */
	54	0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
	55	0x75, 0x0C, /* Report Size (12), */
	56	0x81, 0x02, /* Input (Variable), */
	57	0x09, 0x32, /* Changed Usage (Z), */
	58	0x15, 0x00, /* Logical Minimum (0), */
	59	0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
	60	0x75, 0x0C, /* Report Size (12), */
	61	0x81, 0x02, /* Input (Variable), */
	62	0x05, 0x01, /* Usage Page (Desktop), */
	63	0x09, 0x39, /* Usage (Hat Switch), */
	64	0x25, 0x07, /* Logical Maximum (7), */
	65	0x35, 0x00, /* Physical Minimum (0), */
	66	0x46, 0x3B, 0x01, /* Physical Maximum (315), */
	67	0x65, 0x14, /* Unit (Degrees), */
	68	0x75, 0x04, /* Report Size (4), */
	69	0x95, 0x01, /* Report Count (1), */
	70	0x81, 0x02, /* Input (Variable), */
	71	0x25, 0x01, /* Logical Maximum (1), */
	72	0x45, 0x01, /* Physical Maximum (1), */
	73	0x65, 0x00, /* Unit, */
	74	0x75, 0x01, /* Report Size (1), */
	75	0x95, 0x03, /* Report Count (3), */
	76	0x81, 0x01, /* Input (Constant), */
	77	0x05, 0x09, /* Usage Page (Button), */
	78	0x19, 0x01, /* Usage Minimum (01h), */
	79	0x29, 0x11, /* Usage Maximum (11h), */
	80	0x95, 0x11, /* Report Count (17), */
	81	0x81, 0x02, /* Input (Variable), */
	82	/* ---- Dial patch starts here ---- */
	83	0x05, 0x01, /* Usage Page (Desktop), */
	84	0x09, 0x33, /* Usage (RX), */
	85	0x75, 0x04, /* Report Size (4), */
	86	0x95, 0x02, /* Report Count (2), */
	87	0x15, 0x00, /* Logical Minimum (0), */
	88	0x25, 0x0b, /* Logical Maximum (b), */
	89	0x81, 0x02, /* Input (Variable), */
	90	0x09, 0x35, /* Usage (RZ), */
	91	0x75, 0x04, /* Report Size (4), */
	92	0x95, 0x01, /* Report Count (1), */
	93	0x25, 0x03, /* Logical Maximum (3), */
	94	0x81, 0x02, /* Input (Variable), */
95	/* ---- Dial patch ends here ---- */
96	0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
97	0x09, 0x01, /* Usage (01h), */
98	0x75, 0x04, /* Changed Report Size (4), */
99	0x95, 0x0D, /* Changed Report Count (13), */
100	0x81, 0x02, /* Input (Variable), */
101	0xC0, /* End Collection, */
102	0xA1, 0x02, /* Collection (Logical), */
103	0x09, 0x02, /* Usage (02h), */
104	0x75, 0x08, /* Report Size (8), */
105	0x95, 0x10, /* Report Count (16), */
106	0x91, 0x02, /* Output (Variable), */
107	0xC0, /* End Collection, */
108	0xC0 /* End Collection */
109	};
110
b52b5061 SW	111	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	112	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	113	static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
	114	{
	115	struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
	116	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
	117	__s32 *value = report->field[0]->value;
	118
	119	value[0] = 0x40;
	120	value[1] = leds & 0xFF;
	121	value[2] = leds >> 8;
	122	value[3] = 0x00;
	123	value[4] = 0x00;
	124	value[5] = 0x00;
	125	value[6] = 0x00;
	126	value[7] = 0x00;
	127	value[8] = 0x00;
	128	value[9] = 0x00;
	129	value[10] = 0x00;
	130	value[11] = 0x00;
	131	value[12] = 0x00;
	132	value[13] = 0x00;
	133	value[14] = 0x00;
	134	value[15] = 0x00;
	135
d8814272	136	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
2e2daff3 SW	137
	138	/* Note: LED change does not show on device until the device is read/polled */
	139	}
	140
e25d7805 SW	141	static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
	142	enum led_brightness value)
	143	{
	144	struct device *dev = led_cdev->dev->parent;
	145	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	146	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	147
	148	if (!drv_data) {
	149	hid_err(hid, "Device data not found.");
	150	return;
	151	}
	152
	153	if (value == LED_OFF)
	154	drv_data->led_state = 0;
	155	else
	156	drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
	157
	158	steelseries_srws1_set_leds(hid, drv_data->led_state);
	159	}
	160
	161	static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
	162	{
	163	struct device *dev = led_cdev->dev->parent;
	164	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	165	struct steelseries_srws1_data *drv_data;
	166
	167	drv_data = hid_get_drvdata(hid);
	168
	169	if (!drv_data) {
	170	hid_err(hid, "Device data not found.");
	171	return LED_OFF;
	172	}
	173
	174	return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
	175	}
	176
2e2daff3 SW	177	static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
	178	enum led_brightness value)
	179	{
	180	struct device *dev = led_cdev->dev->parent;
	181	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	182	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	183	int i, state = 0;
	184
	185	if (!drv_data) {
	186	hid_err(hid, "Device data not found.");
	187	return;
	188	}
	189
	190	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	191	if (led_cdev != drv_data->led[i])
	192	continue;
	193
	194	state = (drv_data->led_state >> i) & 1;
	195	if (value == LED_OFF && state) {
	196	drv_data->led_state &= ~(1 << i);
	197	steelseries_srws1_set_leds(hid, drv_data->led_state);
	198	} else if (value != LED_OFF && !state) {
	199	drv_data->led_state \|= 1 << i;
	200	steelseries_srws1_set_leds(hid, drv_data->led_state);
	201	}
	202	break;
	203	}
	204	}
	205
	206	static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
	207	{
	208	struct device *dev = led_cdev->dev->parent;
	209	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	210	struct steelseries_srws1_data *drv_data;
	211	int i, value = 0;
	212
	213	drv_data = hid_get_drvdata(hid);
	214
	215	if (!drv_data) {
	216	hid_err(hid, "Device data not found.");
	217	return LED_OFF;
	218	}
	219
	220	for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
	221	if (led_cdev == drv_data->led[i]) {
	222	value = (drv_data->led_state >> i) & 1;
	223	break;
	224	}
	225
	226	return value ? LED_FULL : LED_OFF;
	227	}
	228
	229	static int steelseries_srws1_probe(struct hid_device *hdev,
	230	const struct hid_device_id *id)
	231	{
	232	int ret, i;
	233	struct led_classdev *led;
	234	size_t name_sz;
	235	char *name;
	236
	237	struct steelseries_srws1_data drv_data = kzalloc(sizeof(drv_data), GFP_KERNEL);
	238
	239	if (drv_data == NULL) {
	240	hid_err(hdev, "can't alloc SRW-S1 memory\n");
241	return -ENOMEM;
242	}
243
244	hid_set_drvdata(hdev, drv_data);
245
246	ret = hid_parse(hdev);
247	if (ret) {
248	hid_err(hdev, "parse failed\n");
249	goto err_free;
250	}
251
252	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
253	if (ret) {
254	hid_err(hdev, "hw start failed\n");
255	goto err_free;
256	}
257
258	/* register led subsystem */
259	drv_data->led_state = 0;
e25d7805	260	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
2e2daff3 SW	261	drv_data->led[i] = NULL;
	262
	263	steelseries_srws1_set_leds(hdev, 0);
	264
e25d7805 SW	265	name_sz = strlen(hdev->uniq) + 16;
	266
	267	/* 'ALL', for setting all LEDs simultaneously */
	268	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	269	if (!led) {
	270	hid_err(hdev, "can't allocate memory for LED ALL\n");
	271	goto err_led;
	272	}
	273
	274	name = (void *)(&led[1]);
	275	snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
	276	led->name = name;
	277	led->brightness = 0;
	278	led->max_brightness = 1;
	279	led->brightness_get = steelseries_srws1_led_all_get_brightness;
	280	led->brightness_set = steelseries_srws1_led_all_set_brightness;
	281
	282	drv_data->led[SRWS1_NUMBER_LEDS] = led;
	283	ret = led_classdev_register(&hdev->dev, led);
	284	if (ret)
	285	goto err_led;
2e2daff3	286
e25d7805	287	/* Each individual LED */
2e2daff3 SW	288	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	289	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	290	if (!led) {
	291	hid_err(hdev, "can't allocate memory for LED %d\n", i);
	292	goto err_led;
	293	}
	294
	295	name = (void *)(&led[1]);
	296	snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
	297	led->name = name;
	298	led->brightness = 0;
	299	led->max_brightness = 1;
	300	led->brightness_get = steelseries_srws1_led_get_brightness;
	301	led->brightness_set = steelseries_srws1_led_set_brightness;
	302
	303	drv_data->led[i] = led;
	304	ret = led_classdev_register(&hdev->dev, led);
	305
	306	if (ret) {
	307	hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
	308	err_led:
	309	/* Deregister all LEDs (if any) */
e25d7805	310	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	311	led = drv_data->led[i];
	312	drv_data->led[i] = NULL;
	313	if (!led)
	314	continue;
	315	led_classdev_unregister(led);
	316	kfree(led);
	317	}
	318	goto out; /* but let the driver continue without LEDs */
	319	}
	320	}
	321	out:
	322	return 0;
	323	err_free:
	324	kfree(drv_data);
	325	return ret;
	326	}
	327
	328	static void steelseries_srws1_remove(struct hid_device *hdev)
	329	{
	330	int i;
	331	struct led_classdev *led;
	332
	333	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
	334
	335	if (drv_data) {
	336	/* Deregister LEDs (if any) */
e25d7805	337	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	338	led = drv_data->led[i];
	339	drv_data->led[i] = NULL;
	340	if (!led)
	341	continue;
	342	led_classdev_unregister(led);
	343	kfree(led);
	344	}
	345
	346	}
	347
	348	hid_hw_stop(hdev);
	349	kfree(drv_data);
	350	return;
	351	}
	352	#endif
	353
75dbb953 SW	354	static __u8 steelseries_srws1_report_fixup(struct hid_device hdev, __u8 *rdesc,
	355	unsigned int *rsize)
	356	{
	357	if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
	358	&& rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
	359	hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
5492606d SW	360	rdesc = steelseries_srws1_rdesc_fixed;
5492606d SW	361	*rsize = sizeof(steelseries_srws1_rdesc_fixed);
75dbb953 SW	362	}
	363	return rdesc;
	364	}
	365
	366	static const struct hid_device_id steelseries_srws1_devices[] = {
	367	{ HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
	368	{ }
	369	};
	370	MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
	371
	372	static struct hid_driver steelseries_srws1_driver = {
	373	.name = "steelseries_srws1",
	374	.id_table = steelseries_srws1_devices,
b52b5061 SW	375	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	376	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	377	.probe = steelseries_srws1_probe,
	378	.remove = steelseries_srws1_remove,
	379	#endif
75dbb953 SW	380	.report_fixup = steelseries_srws1_report_fixup
	381	};
	382
bb64469a	383	module_hid_driver(steelseries_srws1_driver);
75dbb953	384	MODULE_LICENSE("GPL");