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