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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  HID driver for Steelseries SRW-S1
 *
 *  Copyright (c) 2013 Simon Wood
 */

/*
 */

#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/leds.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 = to_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 = to_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 = to_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 = to_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;
	}

	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
		ret = -ENODEV;
		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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
75dbb953 SW	2	/*
	3	* HID driver for Steelseries SRW-S1
	4	*
	5	* Copyright (c) 2013 Simon Wood
	6	*/
	7
	8	/*
75dbb953 SW	9	*/
	10
	11	#include <linux/device.h>
	12	#include <linux/hid.h>
	13	#include <linux/module.h>
f28bb5ce	14	#include <linux/leds.h>
75dbb953 SW	15
	16	#include "hid-ids.h"
	17
b52b5061 SW	18	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	19	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	20	#define SRWS1_NUMBER_LEDS 15
	21	struct steelseries_srws1_data {
	22	__u16 led_state;
7e415762 JK	23	/* the last element is used for setting all leds simultaneously */
7e415762 JK	24	struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
2e2daff3 SW	25	};
	26	#endif
	27
5492606d SW	28	/* Fixed report descriptor for Steelseries SRW-S1 wheel controller
	29	*
	30	* The original descriptor hides the sensitivity and assists dials
	31	* a custom vendor usage page. This inserts a patch to make them
	32	* appear in the 'Generic Desktop' usage.
	33	*/
	34
	35	static __u8 steelseries_srws1_rdesc_fixed[] = {
	36	0x05, 0x01, /* Usage Page (Desktop) */
	37	0x09, 0x08, /* Usage (MultiAxis), Changed */
	38	0xA1, 0x01, /* Collection (Application), */
	39	0xA1, 0x02, /* Collection (Logical), */
	40	0x95, 0x01, /* Report Count (1), */
	41	0x05, 0x01, /* Changed Usage Page (Desktop), */
	42	0x09, 0x30, /* Changed Usage (X), */
	43	0x16, 0xF8, 0xF8, /* Logical Minimum (-1800), */
	44	0x26, 0x08, 0x07, /* Logical Maximum (1800), */
	45	0x65, 0x14, /* Unit (Degrees), */
	46	0x55, 0x0F, /* Unit Exponent (15), */
	47	0x75, 0x10, /* Report Size (16), */
	48	0x81, 0x02, /* Input (Variable), */
	49	0x09, 0x31, /* Changed Usage (Y), */
	50	0x15, 0x00, /* Logical Minimum (0), */
	51	0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
	52	0x75, 0x0C, /* Report Size (12), */
	53	0x81, 0x02, /* Input (Variable), */
	54	0x09, 0x32, /* Changed Usage (Z), */
	55	0x15, 0x00, /* Logical Minimum (0), */
	56	0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
	57	0x75, 0x0C, /* Report Size (12), */
	58	0x81, 0x02, /* Input (Variable), */
	59	0x05, 0x01, /* Usage Page (Desktop), */
	60	0x09, 0x39, /* Usage (Hat Switch), */
	61	0x25, 0x07, /* Logical Maximum (7), */
	62	0x35, 0x00, /* Physical Minimum (0), */
	63	0x46, 0x3B, 0x01, /* Physical Maximum (315), */
	64	0x65, 0x14, /* Unit (Degrees), */
	65	0x75, 0x04, /* Report Size (4), */
	66	0x95, 0x01, /* Report Count (1), */
	67	0x81, 0x02, /* Input (Variable), */
	68	0x25, 0x01, /* Logical Maximum (1), */
	69	0x45, 0x01, /* Physical Maximum (1), */
	70	0x65, 0x00, /* Unit, */
	71	0x75, 0x01, /* Report Size (1), */
	72	0x95, 0x03, /* Report Count (3), */
	73	0x81, 0x01, /* Input (Constant), */
	74	0x05, 0x09, /* Usage Page (Button), */
	75	0x19, 0x01, /* Usage Minimum (01h), */
	76	0x29, 0x11, /* Usage Maximum (11h), */
	77	0x95, 0x11, /* Report Count (17), */
	78	0x81, 0x02, /* Input (Variable), */
	79	/* ---- Dial patch starts here ---- */
	80	0x05, 0x01, /* Usage Page (Desktop), */
	81	0x09, 0x33, /* Usage (RX), */
	82	0x75, 0x04, /* Report Size (4), */
	83	0x95, 0x02, /* Report Count (2), */
	84	0x15, 0x00, /* Logical Minimum (0), */
	85	0x25, 0x0b, /* Logical Maximum (b), */
	86	0x81, 0x02, /* Input (Variable), */
	87	0x09, 0x35, /* Usage (RZ), */
	88	0x75, 0x04, /* Report Size (4), */
	89	0x95, 0x01, /* Report Count (1), */
	90	0x25, 0x03, /* Logical Maximum (3), */
	91	0x81, 0x02, /* Input (Variable), */
92	/* ---- Dial patch ends here ---- */
93	0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
94	0x09, 0x01, /* Usage (01h), */
95	0x75, 0x04, /* Changed Report Size (4), */
96	0x95, 0x0D, /* Changed Report Count (13), */
97	0x81, 0x02, /* Input (Variable), */
98	0xC0, /* End Collection, */
99	0xA1, 0x02, /* Collection (Logical), */
100	0x09, 0x02, /* Usage (02h), */
101	0x75, 0x08, /* Report Size (8), */
102	0x95, 0x10, /* Report Count (16), */
103	0x91, 0x02, /* Output (Variable), */
104	0xC0, /* End Collection, */
105	0xC0 /* End Collection */
106	};
107
b52b5061 SW	108	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	109	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	110	static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
	111	{
	112	struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
	113	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
	114	__s32 *value = report->field[0]->value;
	115
	116	value[0] = 0x40;
	117	value[1] = leds & 0xFF;
	118	value[2] = leds >> 8;
	119	value[3] = 0x00;
	120	value[4] = 0x00;
	121	value[5] = 0x00;
	122	value[6] = 0x00;
	123	value[7] = 0x00;
	124	value[8] = 0x00;
	125	value[9] = 0x00;
	126	value[10] = 0x00;
	127	value[11] = 0x00;
	128	value[12] = 0x00;
	129	value[13] = 0x00;
	130	value[14] = 0x00;
	131	value[15] = 0x00;
	132
d8814272	133	hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
2e2daff3 SW	134
	135	/* Note: LED change does not show on device until the device is read/polled */
	136	}
	137
e25d7805 SW	138	static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
	139	enum led_brightness value)
	140	{
	141	struct device *dev = led_cdev->dev->parent;
ee79a8f8	142	struct hid_device *hid = to_hid_device(dev);
e25d7805 SW	143	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	144
	145	if (!drv_data) {
	146	hid_err(hid, "Device data not found.");
	147	return;
	148	}
	149
	150	if (value == LED_OFF)
	151	drv_data->led_state = 0;
	152	else
	153	drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
	154
	155	steelseries_srws1_set_leds(hid, drv_data->led_state);
	156	}
	157
	158	static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
	159	{
	160	struct device *dev = led_cdev->dev->parent;
ee79a8f8	161	struct hid_device *hid = to_hid_device(dev);
e25d7805 SW	162	struct steelseries_srws1_data *drv_data;
	163
	164	drv_data = hid_get_drvdata(hid);
	165
	166	if (!drv_data) {
	167	hid_err(hid, "Device data not found.");
	168	return LED_OFF;
	169	}
	170
	171	return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
	172	}
	173
2e2daff3 SW	174	static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
	175	enum led_brightness value)
	176	{
	177	struct device *dev = led_cdev->dev->parent;
ee79a8f8	178	struct hid_device *hid = to_hid_device(dev);
2e2daff3 SW	179	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	180	int i, state = 0;
	181
	182	if (!drv_data) {
	183	hid_err(hid, "Device data not found.");
	184	return;
	185	}
	186
	187	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	188	if (led_cdev != drv_data->led[i])
	189	continue;
	190
	191	state = (drv_data->led_state >> i) & 1;
	192	if (value == LED_OFF && state) {
	193	drv_data->led_state &= ~(1 << i);
	194	steelseries_srws1_set_leds(hid, drv_data->led_state);
	195	} else if (value != LED_OFF && !state) {
	196	drv_data->led_state \|= 1 << i;
	197	steelseries_srws1_set_leds(hid, drv_data->led_state);
	198	}
	199	break;
	200	}
	201	}
	202
	203	static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
	204	{
	205	struct device *dev = led_cdev->dev->parent;
ee79a8f8	206	struct hid_device *hid = to_hid_device(dev);
2e2daff3 SW	207	struct steelseries_srws1_data *drv_data;
	208	int i, value = 0;
	209
	210	drv_data = hid_get_drvdata(hid);
	211
	212	if (!drv_data) {
	213	hid_err(hid, "Device data not found.");
	214	return LED_OFF;
	215	}
	216
	217	for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
	218	if (led_cdev == drv_data->led[i]) {
	219	value = (drv_data->led_state >> i) & 1;
	220	break;
	221	}
	222
	223	return value ? LED_FULL : LED_OFF;
	224	}
	225
	226	static int steelseries_srws1_probe(struct hid_device *hdev,
	227	const struct hid_device_id *id)
	228	{
	229	int ret, i;
	230	struct led_classdev *led;
	231	size_t name_sz;
	232	char *name;
	233
	234	struct steelseries_srws1_data drv_data = kzalloc(sizeof(drv_data), GFP_KERNEL);
	235
	236	if (drv_data == NULL) {
	237	hid_err(hdev, "can't alloc SRW-S1 memory\n");
	238	return -ENOMEM;
	239	}
	240
	241	hid_set_drvdata(hdev, drv_data);
	242
	243	ret = hid_parse(hdev);
	244	if (ret) {
	245	hid_err(hdev, "parse failed\n");
	246	goto err_free;
	247	}
	248
41df7f6d KC	249	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
	250	ret = -ENODEV;
	251	goto err_free;
	252	}
	253
2e2daff3 SW	254	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	255	if (ret) {
	256	hid_err(hdev, "hw start failed\n");
	257	goto err_free;
	258	}
	259
	260	/* register led subsystem */
	261	drv_data->led_state = 0;
e25d7805	262	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
2e2daff3 SW	263	drv_data->led[i] = NULL;
	264
	265	steelseries_srws1_set_leds(hdev, 0);
	266
e25d7805 SW	267	name_sz = strlen(hdev->uniq) + 16;
	268
	269	/* 'ALL', for setting all LEDs simultaneously */
	270	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	271	if (!led) {
	272	hid_err(hdev, "can't allocate memory for LED ALL\n");
	273	goto err_led;
	274	}
	275
	276	name = (void *)(&led[1]);
	277	snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
	278	led->name = name;
	279	led->brightness = 0;
	280	led->max_brightness = 1;
	281	led->brightness_get = steelseries_srws1_led_all_get_brightness;
	282	led->brightness_set = steelseries_srws1_led_all_set_brightness;
	283
	284	drv_data->led[SRWS1_NUMBER_LEDS] = led;
	285	ret = led_classdev_register(&hdev->dev, led);
	286	if (ret)
	287	goto err_led;
2e2daff3	288
e25d7805	289	/* Each individual LED */
2e2daff3 SW	290	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	291	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	292	if (!led) {
	293	hid_err(hdev, "can't allocate memory for LED %d\n", i);
	294	goto err_led;
	295	}
	296
	297	name = (void *)(&led[1]);
	298	snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
	299	led->name = name;
	300	led->brightness = 0;
	301	led->max_brightness = 1;
	302	led->brightness_get = steelseries_srws1_led_get_brightness;
	303	led->brightness_set = steelseries_srws1_led_set_brightness;
	304
	305	drv_data->led[i] = led;
	306	ret = led_classdev_register(&hdev->dev, led);
	307
	308	if (ret) {
	309	hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
	310	err_led:
	311	/* Deregister all LEDs (if any) */
e25d7805	312	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	313	led = drv_data->led[i];
	314	drv_data->led[i] = NULL;
	315	if (!led)
	316	continue;
	317	led_classdev_unregister(led);
	318	kfree(led);
	319	}
	320	goto out; /* but let the driver continue without LEDs */
	321	}
	322	}
	323	out:
	324	return 0;
	325	err_free:
	326	kfree(drv_data);
	327	return ret;
	328	}
	329
	330	static void steelseries_srws1_remove(struct hid_device *hdev)
	331	{
	332	int i;
	333	struct led_classdev *led;
	334
	335	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
	336
	337	if (drv_data) {
	338	/* Deregister LEDs (if any) */
e25d7805	339	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	340	led = drv_data->led[i];
	341	drv_data->led[i] = NULL;
	342	if (!led)
	343	continue;
	344	led_classdev_unregister(led);
	345	kfree(led);
	346	}
	347
	348	}
	349
	350	hid_hw_stop(hdev);
	351	kfree(drv_data);
	352	return;
	353	}
	354	#endif
	355
75dbb953 SW	356	static __u8 steelseries_srws1_report_fixup(struct hid_device hdev, __u8 *rdesc,
	357	unsigned int *rsize)
	358	{
	359	if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
	360	&& rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
	361	hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
5492606d SW	362	rdesc = steelseries_srws1_rdesc_fixed;
5492606d SW	363	*rsize = sizeof(steelseries_srws1_rdesc_fixed);
75dbb953 SW	364	}
	365	return rdesc;
	366	}
	367
	368	static const struct hid_device_id steelseries_srws1_devices[] = {
	369	{ HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
	370	{ }
	371	};
	372	MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
	373
	374	static struct hid_driver steelseries_srws1_driver = {
	375	.name = "steelseries_srws1",
	376	.id_table = steelseries_srws1_devices,
b52b5061 SW	377	#if IS_BUILTIN(CONFIG_LEDS_CLASS) \|\| \
b52b5061 SW	378	(IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
2e2daff3 SW	379	.probe = steelseries_srws1_probe,
	380	.remove = steelseries_srws1_remove,
	381	#endif
75dbb953 SW	382	.report_fixup = steelseries_srws1_report_fixup
	383	};
	384
bb64469a	385	module_hid_driver(steelseries_srws1_driver);
75dbb953	386	MODULE_LICENSE("GPL");