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