[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 "usbhid/usbhid.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;

	usbhid_submit_report(hdev, report, USB_DIR_OUT);

	/* 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
};

static int __init steelseries_srws1_init(void)
{
	return hid_register_driver(&steelseries_srws1_driver);
}

static void __exit steelseries_srws1_exit(void)
{
	hid_unregister_driver(&steelseries_srws1_driver);
}

module_init(steelseries_srws1_init);
module_exit(steelseries_srws1_exit);
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
2e2daff3	19	#include "usbhid/usbhid.h"
75dbb953 SW	20	#include "hid-ids.h"
75dbb953 SW	21
2e2daff3 SW	22	#if defined(CONFIG_LEDS_CLASS) \|\| defined(CONFIG_LEDS_CLASS_MODULE)
	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
2e2daff3 SW	111	#if defined(CONFIG_LEDS_CLASS) \|\| defined(CONFIG_LEDS_CLASS_MODULE)
	112	static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
	113	{
	114	struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
	115	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
	116	__s32 *value = report->field[0]->value;
	117
	118	value[0] = 0x40;
	119	value[1] = leds & 0xFF;
	120	value[2] = leds >> 8;
	121	value[3] = 0x00;
	122	value[4] = 0x00;
	123	value[5] = 0x00;
	124	value[6] = 0x00;
	125	value[7] = 0x00;
	126	value[8] = 0x00;
	127	value[9] = 0x00;
	128	value[10] = 0x00;
	129	value[11] = 0x00;
	130	value[12] = 0x00;
	131	value[13] = 0x00;
	132	value[14] = 0x00;
	133	value[15] = 0x00;
	134
	135	usbhid_submit_report(hdev, report, USB_DIR_OUT);
	136
	137	/* Note: LED change does not show on device until the device is read/polled */
	138	}
	139
e25d7805 SW	140	static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
	141	enum led_brightness value)
	142	{
	143	struct device *dev = led_cdev->dev->parent;
	144	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	145	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	146
	147	if (!drv_data) {
	148	hid_err(hid, "Device data not found.");
	149	return;
	150	}
	151
	152	if (value == LED_OFF)
	153	drv_data->led_state = 0;
	154	else
	155	drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
	156
	157	steelseries_srws1_set_leds(hid, drv_data->led_state);
	158	}
	159
	160	static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
	161	{
	162	struct device *dev = led_cdev->dev->parent;
	163	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	164	struct steelseries_srws1_data *drv_data;
	165
	166	drv_data = hid_get_drvdata(hid);
	167
	168	if (!drv_data) {
	169	hid_err(hid, "Device data not found.");
	170	return LED_OFF;
	171	}
	172
	173	return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
	174	}
	175
2e2daff3 SW	176	static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
	177	enum led_brightness value)
	178	{
	179	struct device *dev = led_cdev->dev->parent;
	180	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	181	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
	182	int i, state = 0;
	183
	184	if (!drv_data) {
	185	hid_err(hid, "Device data not found.");
	186	return;
	187	}
	188
	189	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	190	if (led_cdev != drv_data->led[i])
	191	continue;
	192
	193	state = (drv_data->led_state >> i) & 1;
	194	if (value == LED_OFF && state) {
	195	drv_data->led_state &= ~(1 << i);
	196	steelseries_srws1_set_leds(hid, drv_data->led_state);
	197	} else if (value != LED_OFF && !state) {
	198	drv_data->led_state \|= 1 << i;
	199	steelseries_srws1_set_leds(hid, drv_data->led_state);
	200	}
	201	break;
	202	}
	203	}
	204
	205	static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
	206	{
	207	struct device *dev = led_cdev->dev->parent;
	208	struct hid_device *hid = container_of(dev, struct hid_device, dev);
	209	struct steelseries_srws1_data *drv_data;
	210	int i, value = 0;
	211
	212	drv_data = hid_get_drvdata(hid);
	213
	214	if (!drv_data) {
	215	hid_err(hid, "Device data not found.");
	216	return LED_OFF;
	217	}
	218
	219	for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
	220	if (led_cdev == drv_data->led[i]) {
	221	value = (drv_data->led_state >> i) & 1;
	222	break;
	223	}
	224
	225	return value ? LED_FULL : LED_OFF;
	226	}
	227
	228	static int steelseries_srws1_probe(struct hid_device *hdev,
	229	const struct hid_device_id *id)
	230	{
	231	int ret, i;
	232	struct led_classdev *led;
	233	size_t name_sz;
	234	char *name;
	235
	236	struct steelseries_srws1_data drv_data = kzalloc(sizeof(drv_data), GFP_KERNEL);
	237
	238	if (drv_data == NULL) {
	239	hid_err(hdev, "can't alloc SRW-S1 memory\n");
240	return -ENOMEM;
241	}
242
243	hid_set_drvdata(hdev, drv_data);
244
245	ret = hid_parse(hdev);
246	if (ret) {
247	hid_err(hdev, "parse failed\n");
248	goto err_free;
249	}
250
251	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
252	if (ret) {
253	hid_err(hdev, "hw start failed\n");
254	goto err_free;
255	}
256
257	/* register led subsystem */
258	drv_data->led_state = 0;
e25d7805	259	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
2e2daff3 SW	260	drv_data->led[i] = NULL;
	261
	262	steelseries_srws1_set_leds(hdev, 0);
	263
e25d7805 SW	264	name_sz = strlen(hdev->uniq) + 16;
	265
	266	/* 'ALL', for setting all LEDs simultaneously */
	267	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	268	if (!led) {
	269	hid_err(hdev, "can't allocate memory for LED ALL\n");
	270	goto err_led;
	271	}
	272
	273	name = (void *)(&led[1]);
	274	snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
	275	led->name = name;
	276	led->brightness = 0;
	277	led->max_brightness = 1;
	278	led->brightness_get = steelseries_srws1_led_all_get_brightness;
	279	led->brightness_set = steelseries_srws1_led_all_set_brightness;
	280
	281	drv_data->led[SRWS1_NUMBER_LEDS] = led;
	282	ret = led_classdev_register(&hdev->dev, led);
	283	if (ret)
	284	goto err_led;
2e2daff3	285
e25d7805	286	/* Each individual LED */
2e2daff3 SW	287	for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
	288	led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
	289	if (!led) {
	290	hid_err(hdev, "can't allocate memory for LED %d\n", i);
	291	goto err_led;
	292	}
	293
	294	name = (void *)(&led[1]);
	295	snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
	296	led->name = name;
	297	led->brightness = 0;
	298	led->max_brightness = 1;
	299	led->brightness_get = steelseries_srws1_led_get_brightness;
	300	led->brightness_set = steelseries_srws1_led_set_brightness;
	301
	302	drv_data->led[i] = led;
	303	ret = led_classdev_register(&hdev->dev, led);
	304
	305	if (ret) {
	306	hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
	307	err_led:
	308	/* Deregister all LEDs (if any) */
e25d7805	309	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	310	led = drv_data->led[i];
	311	drv_data->led[i] = NULL;
	312	if (!led)
	313	continue;
	314	led_classdev_unregister(led);
	315	kfree(led);
	316	}
	317	goto out; /* but let the driver continue without LEDs */
	318	}
	319	}
	320	out:
	321	return 0;
	322	err_free:
	323	kfree(drv_data);
	324	return ret;
	325	}
	326
	327	static void steelseries_srws1_remove(struct hid_device *hdev)
	328	{
	329	int i;
	330	struct led_classdev *led;
	331
	332	struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
	333
	334	if (drv_data) {
	335	/* Deregister LEDs (if any) */
e25d7805	336	for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
2e2daff3 SW	337	led = drv_data->led[i];
	338	drv_data->led[i] = NULL;
	339	if (!led)
	340	continue;
	341	led_classdev_unregister(led);
	342	kfree(led);
	343	}
	344
	345	}
	346
	347	hid_hw_stop(hdev);
	348	kfree(drv_data);
	349	return;
	350	}
	351	#endif
	352
75dbb953 SW	353	static __u8 steelseries_srws1_report_fixup(struct hid_device hdev, __u8 *rdesc,
	354	unsigned int *rsize)
	355	{
	356	if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
	357	&& rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
	358	hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
5492606d SW	359	rdesc = steelseries_srws1_rdesc_fixed;
5492606d SW	360	*rsize = sizeof(steelseries_srws1_rdesc_fixed);
75dbb953 SW	361	}
	362	return rdesc;
	363	}
	364
	365	static const struct hid_device_id steelseries_srws1_devices[] = {
	366	{ HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
	367	{ }
	368	};
	369	MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
	370
	371	static struct hid_driver steelseries_srws1_driver = {
	372	.name = "steelseries_srws1",
	373	.id_table = steelseries_srws1_devices,
2e2daff3 SW	374	#if defined(CONFIG_LEDS_CLASS) \|\| defined(CONFIG_LEDS_CLASS_MODULE)
	375	.probe = steelseries_srws1_probe,
	376	.remove = steelseries_srws1_remove,
	377	#endif
75dbb953 SW	378	.report_fixup = steelseries_srws1_report_fixup
	379	};
	380
	381	static int __init steelseries_srws1_init(void)
	382	{
	383	return hid_register_driver(&steelseries_srws1_driver);
	384	}
	385
	386	static void __exit steelseries_srws1_exit(void)
	387	{
	388	hid_unregister_driver(&steelseries_srws1_driver);
	389	}
	390
	391	module_init(steelseries_srws1_init);
	392	module_exit(steelseries_srws1_exit);
	393	MODULE_LICENSE("GPL");