[linux-2.6-block.git] / drivers / media / rc / ttusbir.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * TechnoTrend USB IR Receiver
 *
 * Copyright (C) 2012 Sean Young <sean@mess.org>
 */

#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <media/rc-core.h>

#define DRIVER_NAME	"ttusbir"
#define DRIVER_DESC	"TechnoTrend USB IR Receiver"
/*
 * The Windows driver uses 8 URBS, the original lirc drivers has a
 * configurable amount (2 default, 4 max). This device generates about 125
 * messages per second (!), whether IR is idle or not.
 */
#define NUM_URBS	4
#define NS_PER_BYTE	62500
#define NS_PER_BIT	(NS_PER_BYTE/8)

struct ttusbir {
	struct rc_dev *rc;
	struct device *dev;
	struct usb_device *udev;

	struct urb *urb[NUM_URBS];

	struct led_classdev led;
	struct urb *bulk_urb;
	uint8_t bulk_buffer[5];
	int bulk_out_endp, iso_in_endp;
	bool led_on, is_led_on;
	atomic_t led_complete;

	char phys[64];
};

static enum led_brightness ttusbir_brightness_get(struct led_classdev *led_dev)
{
	struct ttusbir *tt = container_of(led_dev, struct ttusbir, led);

	return tt->led_on ? LED_FULL : LED_OFF;
}

static void ttusbir_set_led(struct ttusbir *tt)
{
	int ret;

	smp_mb();

	if (tt->led_on != tt->is_led_on && tt->udev &&
				atomic_add_unless(&tt->led_complete, 1, 1)) {
		tt->bulk_buffer[4] = tt->is_led_on = tt->led_on;
		ret = usb_submit_urb(tt->bulk_urb, GFP_ATOMIC);
		if (ret) {
			dev_warn(tt->dev, "failed to submit bulk urb: %d\n",
									ret);
			atomic_dec(&tt->led_complete);
		}
	}
}

static void ttusbir_brightness_set(struct led_classdev *led_dev, enum
						led_brightness brightness)
{
	struct ttusbir *tt = container_of(led_dev, struct ttusbir, led);

	tt->led_on = brightness != LED_OFF;

	ttusbir_set_led(tt);
}

/*
 * The urb cannot be reused until the urb completes
 */
static void ttusbir_bulk_complete(struct urb *urb)
{
	struct ttusbir *tt = urb->context;

	atomic_dec(&tt->led_complete);

	switch (urb->status) {
	case 0:
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		usb_unlink_urb(urb);
		return;
	case -EPIPE:
	default:
		dev_dbg(tt->dev, "Error: urb status = %d\n", urb->status);
		break;
	}

	ttusbir_set_led(tt);
}

/*
 * The data is one bit per sample, a set bit signifying silence and samples
 * being MSB first. Bit 0 can contain garbage so take it to be whatever
 * bit 1 is, so we don't have unexpected edges.
 */
static void ttusbir_process_ir_data(struct ttusbir *tt, uint8_t *buf)
{
	struct ir_raw_event rawir = {};
	unsigned i, v, b;
	bool event = false;

	for (i = 0; i < 128; i++) {
		v = buf[i] & 0xfe;
		switch (v) {
		case 0xfe:
			rawir.pulse = false;
			rawir.duration = NS_PER_BYTE;
			if (ir_raw_event_store_with_filter(tt->rc, &rawir))
				event = true;
			break;
		case 0:
			rawir.pulse = true;
			rawir.duration = NS_PER_BYTE;
			if (ir_raw_event_store_with_filter(tt->rc, &rawir))
				event = true;
			break;
		default:
			/* one edge per byte */
			if (v & 2) {
				b = ffz(v | 1);
				rawir.pulse = true;
			} else {
				b = ffs(v) - 1;
				rawir.pulse = false;
			}

			rawir.duration = NS_PER_BIT * (8 - b);
			if (ir_raw_event_store_with_filter(tt->rc, &rawir))
				event = true;

			rawir.pulse = !rawir.pulse;
			rawir.duration = NS_PER_BIT * b;
			if (ir_raw_event_store_with_filter(tt->rc, &rawir))
				event = true;
			break;
		}
	}

	/* don't wakeup when there's nothing to do */
	if (event)
		ir_raw_event_handle(tt->rc);
}

static void ttusbir_urb_complete(struct urb *urb)
{
	struct ttusbir *tt = urb->context;
	int rc;

	switch (urb->status) {
	case 0:
		ttusbir_process_ir_data(tt, urb->transfer_buffer);
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		usb_unlink_urb(urb);
		return;
	case -EPIPE:
	default:
		dev_dbg(tt->dev, "Error: urb status = %d\n", urb->status);
		break;
	}

	rc = usb_submit_urb(urb, GFP_ATOMIC);
	if (rc && rc != -ENODEV)
		dev_warn(tt->dev, "failed to resubmit urb: %d\n", rc);
}

static int ttusbir_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	struct ttusbir *tt;
	struct usb_interface_descriptor *idesc;
	struct usb_endpoint_descriptor *desc;
	struct rc_dev *rc;
	int i, j, ret;
	int altsetting = -1;

	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
	rc = rc_allocate_device(RC_DRIVER_IR_RAW);
	if (!tt || !rc) {
		ret = -ENOMEM;
		goto out;
	}

	/* find the correct alt setting */
	for (i = 0; i < intf->num_altsetting && altsetting == -1; i++) {
		int max_packet, bulk_out_endp = -1, iso_in_endp = -1;

		idesc = &intf->altsetting[i].desc;

		for (j = 0; j < idesc->bNumEndpoints; j++) {
			desc = &intf->altsetting[i].endpoint[j].desc;
			max_packet = le16_to_cpu(desc->wMaxPacketSize);
			if (usb_endpoint_dir_in(desc) &&
					usb_endpoint_xfer_isoc(desc) &&
					max_packet == 0x10)
				iso_in_endp = j;
			else if (usb_endpoint_dir_out(desc) &&
					usb_endpoint_xfer_bulk(desc) &&
					max_packet == 0x20)
				bulk_out_endp = j;

			if (bulk_out_endp != -1 && iso_in_endp != -1) {
				tt->bulk_out_endp = bulk_out_endp;
				tt->iso_in_endp = iso_in_endp;
				altsetting = i;
				break;
			}
		}
	}

	if (altsetting == -1) {
		dev_err(&intf->dev, "cannot find expected altsetting\n");
		ret = -ENODEV;
		goto out;
	}

	tt->dev = &intf->dev;
	tt->udev = interface_to_usbdev(intf);
	tt->rc = rc;

	ret = usb_set_interface(tt->udev, 0, altsetting);
	if (ret)
		goto out;

	for (i = 0; i < NUM_URBS; i++) {
		struct urb *urb = usb_alloc_urb(8, GFP_KERNEL);
		void *buffer;

		if (!urb) {
			ret = -ENOMEM;
			goto out;
		}

		urb->dev = tt->udev;
		urb->context = tt;
		urb->pipe = usb_rcvisocpipe(tt->udev, tt->iso_in_endp);
		urb->interval = 1;
		buffer = usb_alloc_coherent(tt->udev, 128, GFP_KERNEL,
						&urb->transfer_dma);
		if (!buffer) {
			usb_free_urb(urb);
			ret = -ENOMEM;
			goto out;
		}
		urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP | URB_ISO_ASAP;
		urb->transfer_buffer = buffer;
		urb->complete = ttusbir_urb_complete;
		urb->number_of_packets = 8;
		urb->transfer_buffer_length = 128;

		for (j = 0; j < 8; j++) {
			urb->iso_frame_desc[j].offset = j * 16;
			urb->iso_frame_desc[j].length = 16;
		}

		tt->urb[i] = urb;
	}

	tt->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!tt->bulk_urb) {
		ret = -ENOMEM;
		goto out;
	}

	tt->bulk_buffer[0] = 0xaa;
	tt->bulk_buffer[1] = 0x01;
	tt->bulk_buffer[2] = 0x05;
	tt->bulk_buffer[3] = 0x01;

	usb_fill_bulk_urb(tt->bulk_urb, tt->udev, usb_sndbulkpipe(tt->udev,
		tt->bulk_out_endp), tt->bulk_buffer, sizeof(tt->bulk_buffer),
						ttusbir_bulk_complete, tt);

	tt->led.name = "ttusbir:green:power";
	tt->led.default_trigger = "rc-feedback";
	tt->led.brightness_set = ttusbir_brightness_set;
	tt->led.brightness_get = ttusbir_brightness_get;
	tt->is_led_on = tt->led_on = true;
	atomic_set(&tt->led_complete, 0);
	ret = led_classdev_register(&intf->dev, &tt->led);
	if (ret)
		goto out;

	usb_make_path(tt->udev, tt->phys, sizeof(tt->phys));

	rc->device_name = DRIVER_DESC;
	rc->input_phys = tt->phys;
	usb_to_input_id(tt->udev, &rc->input_id);
	rc->dev.parent = &intf->dev;
	rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
	rc->priv = tt;
	rc->driver_name = DRIVER_NAME;
	rc->map_name = RC_MAP_TT_1500;
	rc->min_timeout = 1;
	rc->timeout = IR_DEFAULT_TIMEOUT;
	rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;

	/*
	 * The precision is NS_PER_BIT, but since every 8th bit can be
	 * overwritten with garbage the accuracy is at best 2 * NS_PER_BIT.
	 */
	rc->rx_resolution = NS_PER_BIT;

	ret = rc_register_device(rc);
	if (ret) {
		dev_err(&intf->dev, "failed to register rc device %d\n", ret);
		goto out2;
	}

	usb_set_intfdata(intf, tt);

	for (i = 0; i < NUM_URBS; i++) {
		ret = usb_submit_urb(tt->urb[i], GFP_KERNEL);
		if (ret) {
			dev_err(tt->dev, "failed to submit urb %d\n", ret);
			goto out3;
		}
	}

	return 0;
out3:
	rc_unregister_device(rc);
	rc = NULL;
out2:
	led_classdev_unregister(&tt->led);
out:
	if (tt) {
		for (i = 0; i < NUM_URBS && tt->urb[i]; i++) {
			struct urb *urb = tt->urb[i];

			usb_kill_urb(urb);
			usb_free_coherent(tt->udev, 128, urb->transfer_buffer,
							urb->transfer_dma);
			usb_free_urb(urb);
		}
		usb_kill_urb(tt->bulk_urb);
		usb_free_urb(tt->bulk_urb);
		kfree(tt);
	}
	rc_free_device(rc);

	return ret;
}

static void ttusbir_disconnect(struct usb_interface *intf)
{
	struct ttusbir *tt = usb_get_intfdata(intf);
	struct usb_device *udev = tt->udev;
	int i;

	tt->udev = NULL;

	rc_unregister_device(tt->rc);
	led_classdev_unregister(&tt->led);
	for (i = 0; i < NUM_URBS; i++) {
		usb_kill_urb(tt->urb[i]);
		usb_free_coherent(udev, 128, tt->urb[i]->transfer_buffer,
						tt->urb[i]->transfer_dma);
		usb_free_urb(tt->urb[i]);
	}
	usb_kill_urb(tt->bulk_urb);
	usb_free_urb(tt->bulk_urb);
	usb_set_intfdata(intf, NULL);
	kfree(tt);
}

static int ttusbir_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct ttusbir *tt = usb_get_intfdata(intf);
	int i;

	for (i = 0; i < NUM_URBS; i++)
		usb_kill_urb(tt->urb[i]);

	led_classdev_suspend(&tt->led);
	usb_kill_urb(tt->bulk_urb);

	return 0;
}

static int ttusbir_resume(struct usb_interface *intf)
{
	struct ttusbir *tt = usb_get_intfdata(intf);
	int i, rc;

	tt->is_led_on = true;
	led_classdev_resume(&tt->led);

	for (i = 0; i < NUM_URBS; i++) {
		rc = usb_submit_urb(tt->urb[i], GFP_KERNEL);
		if (rc) {
			dev_warn(tt->dev, "failed to submit urb: %d\n", rc);
			break;
		}
	}

	return rc;
}

static const struct usb_device_id ttusbir_table[] = {
	{ USB_DEVICE(0x0b48, 0x2003) },
	{ }
};

static struct usb_driver ttusbir_driver = {
	.name = DRIVER_NAME,
	.id_table = ttusbir_table,
	.probe = ttusbir_probe,
	.suspend = ttusbir_suspend,
	.resume = ttusbir_resume,
	.reset_resume = ttusbir_resume,
	.disconnect = ttusbir_disconnect,
};

module_usb_driver(ttusbir_driver);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Sean Young <sean@mess.org>");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(usb, ttusbir_table);
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
0938069f SY	2	/*
	3	* TechnoTrend USB IR Receiver
	4	*
	5	* Copyright (C) 2012 Sean Young <sean@mess.org>
0938069f SY	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/usb.h>
	10	#include <linux/usb/input.h>
	11	#include <linux/slab.h>
	12	#include <linux/leds.h>
	13	#include <media/rc-core.h>
	14
	15	#define DRIVER_NAME "ttusbir"
	16	#define DRIVER_DESC "TechnoTrend USB IR Receiver"
	17	/*
	18	* The Windows driver uses 8 URBS, the original lirc drivers has a
	19	* configurable amount (2 default, 4 max). This device generates about 125
	20	* messages per second (!), whether IR is idle or not.
	21	*/
	22	#define NUM_URBS 4
	23	#define NS_PER_BYTE 62500
	24	#define NS_PER_BIT (NS_PER_BYTE/8)
	25
	26	struct ttusbir {
	27	struct rc_dev *rc;
	28	struct device *dev;
	29	struct usb_device *udev;
	30
	31	struct urb *urb[NUM_URBS];
	32
	33	struct led_classdev led;
	34	struct urb *bulk_urb;
	35	uint8_t bulk_buffer[5];
	36	int bulk_out_endp, iso_in_endp;
	37	bool led_on, is_led_on;
	38	atomic_t led_complete;
	39
	40	char phys[64];
	41	};
	42
	43	static enum led_brightness ttusbir_brightness_get(struct led_classdev *led_dev)
	44	{
	45	struct ttusbir *tt = container_of(led_dev, struct ttusbir, led);
	46
	47	return tt->led_on ? LED_FULL : LED_OFF;
	48	}
	49
	50	static void ttusbir_set_led(struct ttusbir *tt)
	51	{
	52	int ret;
	53
	54	smp_mb();
	55
3404cb5c	56	if (tt->led_on != tt->is_led_on && tt->udev &&
0938069f SY	57	atomic_add_unless(&tt->led_complete, 1, 1)) {
	58	tt->bulk_buffer[4] = tt->is_led_on = tt->led_on;
	59	ret = usb_submit_urb(tt->bulk_urb, GFP_ATOMIC);
3404cb5c	60	if (ret) {
0938069f SY	61	dev_warn(tt->dev, "failed to submit bulk urb: %d\n",
	62	ret);
	63	atomic_dec(&tt->led_complete);
	64	}
	65	}
	66	}
	67
	68	static void ttusbir_brightness_set(struct led_classdev *led_dev, enum
	69	led_brightness brightness)
	70	{
	71	struct ttusbir *tt = container_of(led_dev, struct ttusbir, led);
	72
	73	tt->led_on = brightness != LED_OFF;
	74
	75	ttusbir_set_led(tt);
	76	}
	77
	78	/*
	79	* The urb cannot be reused until the urb completes
	80	*/
	81	static void ttusbir_bulk_complete(struct urb *urb)
	82	{
	83	struct ttusbir *tt = urb->context;
	84
	85	atomic_dec(&tt->led_complete);
	86
	87	switch (urb->status) {
	88	case 0:
	89	break;
	90	case -ECONNRESET:
	91	case -ENOENT:
	92	case -ESHUTDOWN:
	93	usb_unlink_urb(urb);
	94	return;
	95	case -EPIPE:
	96	default:
	97	dev_dbg(tt->dev, "Error: urb status = %d\n", urb->status);
	98	break;
	99	}
	100
	101	ttusbir_set_led(tt);
	102	}
	103
	104	/*
	105	* The data is one bit per sample, a set bit signifying silence and samples
	106	* being MSB first. Bit 0 can contain garbage so take it to be whatever
	107	* bit 1 is, so we don't have unexpected edges.
	108	*/
	109	static void ttusbir_process_ir_data(struct ttusbir tt, uint8_t buf)
	110	{
183e19f5	111	struct ir_raw_event rawir = {};
0938069f	112	unsigned i, v, b;
b83bfd1b	113	bool event = false;
0938069f	114
0938069f SY	115	for (i = 0; i < 128; i++) {
	116	v = buf[i] & 0xfe;
	117	switch (v) {
	118	case 0xfe:
	119	rawir.pulse = false;
	120	rawir.duration = NS_PER_BYTE;
b83bfd1b SY	121	if (ir_raw_event_store_with_filter(tt->rc, &rawir))
b83bfd1b SY	122	event = true;
0938069f SY	123	break;
	124	case 0:
	125	rawir.pulse = true;
	126	rawir.duration = NS_PER_BYTE;
b83bfd1b SY	127	if (ir_raw_event_store_with_filter(tt->rc, &rawir))
b83bfd1b SY	128	event = true;
0938069f SY	129	break;
	130	default:
	131	/* one edge per byte */
	132	if (v & 2) {
	133	b = ffz(v \| 1);
	134	rawir.pulse = true;
	135	} else {
	136	b = ffs(v) - 1;
	137	rawir.pulse = false;
	138	}
	139
	140	rawir.duration = NS_PER_BIT * (8 - b);
b83bfd1b SY	141	if (ir_raw_event_store_with_filter(tt->rc, &rawir))
b83bfd1b SY	142	event = true;
0938069f SY	143
	144	rawir.pulse = !rawir.pulse;
	145	rawir.duration = NS_PER_BIT * b;
b83bfd1b SY	146	if (ir_raw_event_store_with_filter(tt->rc, &rawir))
b83bfd1b SY	147	event = true;
0938069f SY	148	break;
	149	}
	150	}
	151
b83bfd1b SY	152	/* don't wakeup when there's nothing to do */
	153	if (event)
	154	ir_raw_event_handle(tt->rc);
0938069f SY	155	}
	156
	157	static void ttusbir_urb_complete(struct urb *urb)
	158	{
	159	struct ttusbir *tt = urb->context;
	160	int rc;
	161
	162	switch (urb->status) {
	163	case 0:
	164	ttusbir_process_ir_data(tt, urb->transfer_buffer);
	165	break;
	166	case -ECONNRESET:
	167	case -ENOENT:
	168	case -ESHUTDOWN:
	169	usb_unlink_urb(urb);
	170	return;
	171	case -EPIPE:
	172	default:
	173	dev_dbg(tt->dev, "Error: urb status = %d\n", urb->status);
	174	break;
	175	}
	176
	177	rc = usb_submit_urb(urb, GFP_ATOMIC);
	178	if (rc && rc != -ENODEV)
	179	dev_warn(tt->dev, "failed to resubmit urb: %d\n", rc);
	180	}
	181
4c62e976 GKH	182	static int ttusbir_probe(struct usb_interface *intf,
4c62e976 GKH	183	const struct usb_device_id *id)
0938069f SY	184	{
	185	struct ttusbir *tt;
	186	struct usb_interface_descriptor *idesc;
	187	struct usb_endpoint_descriptor *desc;
	188	struct rc_dev *rc;
	189	int i, j, ret;
	190	int altsetting = -1;
	191
	192	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
0f7499fd	193	rc = rc_allocate_device(RC_DRIVER_IR_RAW);
0938069f SY	194	if (!tt \|\| !rc) {
	195	ret = -ENOMEM;
	196	goto out;
	197	}
	198
	199	/* find the correct alt setting */
	200	for (i = 0; i < intf->num_altsetting && altsetting == -1; i++) {
1e801adc	201	int max_packet, bulk_out_endp = -1, iso_in_endp = -1;
0938069f SY	202
	203	idesc = &intf->altsetting[i].desc;
	204
	205	for (j = 0; j < idesc->bNumEndpoints; j++) {
	206	desc = &intf->altsetting[i].endpoint[j].desc;
1e801adc	207	max_packet = le16_to_cpu(desc->wMaxPacketSize);
0938069f SY	208	if (usb_endpoint_dir_in(desc) &&
0938069f SY	209	usb_endpoint_xfer_isoc(desc) &&
1e801adc	210	max_packet == 0x10)
0938069f SY	211	iso_in_endp = j;
	212	else if (usb_endpoint_dir_out(desc) &&
	213	usb_endpoint_xfer_bulk(desc) &&
1e801adc	214	max_packet == 0x20)
0938069f SY	215	bulk_out_endp = j;
	216
	217	if (bulk_out_endp != -1 && iso_in_endp != -1) {
	218	tt->bulk_out_endp = bulk_out_endp;
	219	tt->iso_in_endp = iso_in_endp;
	220	altsetting = i;
	221	break;
	222	}
	223	}
	224	}
	225
	226	if (altsetting == -1) {
	227	dev_err(&intf->dev, "cannot find expected altsetting\n");
	228	ret = -ENODEV;
	229	goto out;
	230	}
	231
	232	tt->dev = &intf->dev;
	233	tt->udev = interface_to_usbdev(intf);
	234	tt->rc = rc;
	235
	236	ret = usb_set_interface(tt->udev, 0, altsetting);
	237	if (ret)
	238	goto out;
	239
	240	for (i = 0; i < NUM_URBS; i++) {
	241	struct urb *urb = usb_alloc_urb(8, GFP_KERNEL);
	242	void *buffer;
	243
	244	if (!urb) {
	245	ret = -ENOMEM;
	246	goto out;
	247	}
	248
	249	urb->dev = tt->udev;
	250	urb->context = tt;
	251	urb->pipe = usb_rcvisocpipe(tt->udev, tt->iso_in_endp);
	252	urb->interval = 1;
	253	buffer = usb_alloc_coherent(tt->udev, 128, GFP_KERNEL,
	254	&urb->transfer_dma);
	255	if (!buffer) {
	256	usb_free_urb(urb);
	257	ret = -ENOMEM;
	258	goto out;
	259	}
	260	urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP \| URB_ISO_ASAP;
	261	urb->transfer_buffer = buffer;
	262	urb->complete = ttusbir_urb_complete;
	263	urb->number_of_packets = 8;
	264	urb->transfer_buffer_length = 128;
	265
	266	for (j = 0; j < 8; j++) {
	267	urb->iso_frame_desc[j].offset = j * 16;
	268	urb->iso_frame_desc[j].length = 16;
	269	}
	270
	271	tt->urb[i] = urb;
	272	}
	273
	274	tt->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
	275	if (!tt->bulk_urb) {
	276	ret = -ENOMEM;
	277	goto out;
	278	}
279
280	tt->bulk_buffer[0] = 0xaa;
281	tt->bulk_buffer[1] = 0x01;
282	tt->bulk_buffer[2] = 0x05;
283	tt->bulk_buffer[3] = 0x01;
284
285	usb_fill_bulk_urb(tt->bulk_urb, tt->udev, usb_sndbulkpipe(tt->udev,
286	tt->bulk_out_endp), tt->bulk_buffer, sizeof(tt->bulk_buffer),
287	ttusbir_bulk_complete, tt);
288
3404cb5c	289	tt->led.name = "ttusbir:green:power";
5704e76c	290	tt->led.default_trigger = "rc-feedback";
0938069f SY	291	tt->led.brightness_set = ttusbir_brightness_set;
	292	tt->led.brightness_get = ttusbir_brightness_get;
	293	tt->is_led_on = tt->led_on = true;
	294	atomic_set(&tt->led_complete, 0);
	295	ret = led_classdev_register(&intf->dev, &tt->led);
	296	if (ret)
	297	goto out;
	298
	299	usb_make_path(tt->udev, tt->phys, sizeof(tt->phys));
	300
518f4b26	301	rc->device_name = DRIVER_DESC;
0938069f SY	302	rc->input_phys = tt->phys;
	303	usb_to_input_id(tt->udev, &rc->input_id);
	304	rc->dev.parent = &intf->dev;
6d741bfe	305	rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
0938069f SY	306	rc->priv = tt;
	307	rc->driver_name = DRIVER_NAME;
	308	rc->map_name = RC_MAP_TT_1500;
56a6036c SY	309	rc->min_timeout = 1;
	310	rc->timeout = IR_DEFAULT_TIMEOUT;
	311	rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
	312
0938069f SY	313	/*
	314	* The precision is NS_PER_BIT, but since every 8th bit can be
	315	* overwritten with garbage the accuracy is at best 2 * NS_PER_BIT.
	316	*/
	317	rc->rx_resolution = NS_PER_BIT;
	318
	319	ret = rc_register_device(rc);
	320	if (ret) {
	321	dev_err(&intf->dev, "failed to register rc device %d\n", ret);
	322	goto out2;
	323	}
	324
	325	usb_set_intfdata(intf, tt);
	326
	327	for (i = 0; i < NUM_URBS; i++) {
	328	ret = usb_submit_urb(tt->urb[i], GFP_KERNEL);
	329	if (ret) {
	330	dev_err(tt->dev, "failed to submit urb %d\n", ret);
	331	goto out3;
	332	}
	333	}
	334
	335	return 0;
	336	out3:
	337	rc_unregister_device(rc);
a9bd87c2	338	rc = NULL;
0938069f SY	339	out2:
	340	led_classdev_unregister(&tt->led);
	341	out:
	342	if (tt) {
	343	for (i = 0; i < NUM_URBS && tt->urb[i]; i++) {
	344	struct urb *urb = tt->urb[i];
	345
	346	usb_kill_urb(urb);
	347	usb_free_coherent(tt->udev, 128, urb->transfer_buffer,
	348	urb->transfer_dma);
	349	usb_free_urb(urb);
	350	}
	351	usb_kill_urb(tt->bulk_urb);
	352	usb_free_urb(tt->bulk_urb);
	353	kfree(tt);
	354	}
	355	rc_free_device(rc);
	356
	357	return ret;
	358	}
	359
4c62e976	360	static void ttusbir_disconnect(struct usb_interface *intf)
0938069f SY	361	{
0938069f SY	362	struct ttusbir *tt = usb_get_intfdata(intf);
3404cb5c	363	struct usb_device *udev = tt->udev;
0938069f SY	364	int i;
0938069f SY	365
3404cb5c SY	366	tt->udev = NULL;
3404cb5c SY	367
0938069f SY	368	rc_unregister_device(tt->rc);
	369	led_classdev_unregister(&tt->led);
	370	for (i = 0; i < NUM_URBS; i++) {
	371	usb_kill_urb(tt->urb[i]);
3404cb5c	372	usb_free_coherent(udev, 128, tt->urb[i]->transfer_buffer,
0938069f SY	373	tt->urb[i]->transfer_dma);
	374	usb_free_urb(tt->urb[i]);
	375	}
	376	usb_kill_urb(tt->bulk_urb);
	377	usb_free_urb(tt->bulk_urb);
	378	usb_set_intfdata(intf, NULL);
	379	kfree(tt);
	380	}
	381
3404cb5c SY	382	static int ttusbir_suspend(struct usb_interface *intf, pm_message_t message)
	383	{
	384	struct ttusbir *tt = usb_get_intfdata(intf);
	385	int i;
	386
	387	for (i = 0; i < NUM_URBS; i++)
	388	usb_kill_urb(tt->urb[i]);
	389
	390	led_classdev_suspend(&tt->led);
	391	usb_kill_urb(tt->bulk_urb);
	392
	393	return 0;
	394	}
	395
	396	static int ttusbir_resume(struct usb_interface *intf)
	397	{
	398	struct ttusbir *tt = usb_get_intfdata(intf);
	399	int i, rc;
	400
3404cb5c	401	tt->is_led_on = true;
d2008b56	402	led_classdev_resume(&tt->led);
3404cb5c SY	403
	404	for (i = 0; i < NUM_URBS; i++) {
	405	rc = usb_submit_urb(tt->urb[i], GFP_KERNEL);
	406	if (rc) {
	407	dev_warn(tt->dev, "failed to submit urb: %d\n", rc);
	408	break;
	409	}
	410	}
	411
	412	return rc;
	413	}
	414
0938069f SY	415	static const struct usb_device_id ttusbir_table[] = {
	416	{ USB_DEVICE(0x0b48, 0x2003) },
	417	{ }
	418	};
	419
	420	static struct usb_driver ttusbir_driver = {
	421	.name = DRIVER_NAME,
	422	.id_table = ttusbir_table,
	423	.probe = ttusbir_probe,
3404cb5c SY	424	.suspend = ttusbir_suspend,
	425	.resume = ttusbir_resume,
	426	.reset_resume = ttusbir_resume,
4c62e976	427	.disconnect = ttusbir_disconnect,
0938069f SY	428	};
	429
	430	module_usb_driver(ttusbir_driver);
	431
	432	MODULE_DESCRIPTION(DRIVER_DESC);
	433	MODULE_AUTHOR("Sean Young <sean@mess.org>");
	434	MODULE_LICENSE("GPL");
	435	MODULE_DEVICE_TABLE(usb, ttusbir_table);
	436