[deliverable/linux.git] / drivers / media / usb / dvb-usb-v2 / usb_urb.c

/* usb-urb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
 * see dvb-usb-init.c for copyright information.
 *
 * This file keeps functions for initializing and handling the
 * BULK and ISOC USB data transfers in a generic way.
 * Can be used for DVB-only and also, that's the plan, for
 * Hybrid USB devices (analog and DVB).
 */
#include "dvb_usb_common.h"

/* URB stuff for streaming */

int usb_urb_reconfig(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props);

static void usb_urb_complete(struct urb *urb)
{
	struct usb_data_stream *stream = urb->context;
	int ptype = usb_pipetype(urb->pipe);
	int i;
	u8 *b;

	dev_dbg_ratelimited(&stream->udev->dev,
			"%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
			__func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
			urb->status, urb->actual_length,
			urb->transfer_buffer_length,
			urb->number_of_packets, urb->error_count);

	switch (urb->status) {
	case 0:         /* success */
	case -ETIMEDOUT:    /* NAK */
		break;
	case -ECONNRESET:   /* kill */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	default:        /* error */
		dev_dbg_ratelimited(&stream->udev->dev,
				"%s: urb completition failed=%d\n",
				__func__, urb->status);
		break;
	}

	b = (u8 *) urb->transfer_buffer;
	switch (ptype) {
	case PIPE_ISOCHRONOUS:
		for (i = 0; i < urb->number_of_packets; i++) {
			if (urb->iso_frame_desc[i].status != 0)
				dev_dbg(&stream->udev->dev,
						"%s: iso frame descriptor has an error=%d\n",
						__func__,
						urb->iso_frame_desc[i].status);
			else if (urb->iso_frame_desc[i].actual_length > 0)
				stream->complete(stream,
					b + urb->iso_frame_desc[i].offset,
					urb->iso_frame_desc[i].actual_length);

			urb->iso_frame_desc[i].status = 0;
			urb->iso_frame_desc[i].actual_length = 0;
		}
		break;
	case PIPE_BULK:
		if (urb->actual_length > 0)
			stream->complete(stream, b, urb->actual_length);
		break;
	default:
		dev_err(&stream->udev->dev,
				"%s: unknown endpoint type in completition handler\n",
				KBUILD_MODNAME);
		return;
	}
	usb_submit_urb(urb, GFP_ATOMIC);
}

int usb_urb_killv2(struct usb_data_stream *stream)
{
	int i;
	for (i = 0; i < stream->urbs_submitted; i++) {
		dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
		/* stop the URB */
		usb_kill_urb(stream->urb_list[i]);
	}
	stream->urbs_submitted = 0;
	return 0;
}

int usb_urb_submitv2(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props)
{
	int i, ret;

	if (props) {
		ret = usb_urb_reconfig(stream, props);
		if (ret < 0)
			return ret;
	}

	for (i = 0; i < stream->urbs_initialized; i++) {
		dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
		ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
		if (ret) {
			dev_err(&stream->udev->dev,
					"%s: could not submit urb no. %d - get them all back\n",
					KBUILD_MODNAME, i);
			usb_urb_killv2(stream);
			return ret;
		}
		stream->urbs_submitted++;
	}
	return 0;
}

static int usb_urb_free_urbs(struct usb_data_stream *stream)
{
	int i;

	usb_urb_killv2(stream);

	for (i = stream->urbs_initialized - 1; i >= 0; i--) {
		if (stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
					__func__, i);
			/* free the URBs */
			usb_free_urb(stream->urb_list[i]);
		}
	}
	stream->urbs_initialized = 0;

	return 0;
}

static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
{
	int i, j;

	/* allocate the URBs */
	for (i = 0; i < stream->props.count; i++) {
		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
		stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
		if (!stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
			for (j = 0; j < i; j++)
				usb_free_urb(stream->urb_list[j]);
			return -ENOMEM;
		}
		usb_fill_bulk_urb(stream->urb_list[i],
				stream->udev,
				usb_rcvbulkpipe(stream->udev,
						stream->props.endpoint),
				stream->buf_list[i],
				stream->props.u.bulk.buffersize,
				usb_urb_complete, stream);

		stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
		stream->urb_list[i]->transfer_dma = stream->dma_addr[i];
		stream->urbs_initialized++;
	}
	return 0;
}

static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
{
	int i, j;

	/* allocate the URBs */
	for (i = 0; i < stream->props.count; i++) {
		struct urb *urb;
		int frame_offset = 0;
		dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
		stream->urb_list[i] = usb_alloc_urb(
				stream->props.u.isoc.framesperurb, GFP_ATOMIC);
		if (!stream->urb_list[i]) {
			dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
			for (j = 0; j < i; j++)
				usb_free_urb(stream->urb_list[j]);
			return -ENOMEM;
		}

		urb = stream->urb_list[i];

		urb->dev = stream->udev;
		urb->context = stream;
		urb->complete = usb_urb_complete;
		urb->pipe = usb_rcvisocpipe(stream->udev,
				stream->props.endpoint);
		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
		urb->interval = stream->props.u.isoc.interval;
		urb->number_of_packets = stream->props.u.isoc.framesperurb;
		urb->transfer_buffer_length = stream->props.u.isoc.framesize *
				stream->props.u.isoc.framesperurb;
		urb->transfer_buffer = stream->buf_list[i];
		urb->transfer_dma = stream->dma_addr[i];

		for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
			urb->iso_frame_desc[j].offset = frame_offset;
			urb->iso_frame_desc[j].length =
					stream->props.u.isoc.framesize;
			frame_offset += stream->props.u.isoc.framesize;
		}

		stream->urbs_initialized++;
	}
	return 0;
}

static int usb_free_stream_buffers(struct usb_data_stream *stream)
{
	if (stream->state & USB_STATE_URB_BUF) {
		while (stream->buf_num) {
			stream->buf_num--;
			dev_dbg(&stream->udev->dev, "%s: free buf=%d\n",
				__func__, stream->buf_num);
			usb_free_coherent(stream->udev, stream->buf_size,
					  stream->buf_list[stream->buf_num],
					  stream->dma_addr[stream->buf_num]);
		}
	}

	stream->state &= ~USB_STATE_URB_BUF;

	return 0;
}

static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
				    unsigned long size)
{
	stream->buf_num = 0;
	stream->buf_size = size;

	dev_dbg(&stream->udev->dev,
			"%s: all in all I will use %lu bytes for streaming\n",
			__func__,  num * size);

	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
		stream->buf_list[stream->buf_num] = usb_alloc_coherent(
				stream->udev, size, GFP_ATOMIC,
				&stream->dma_addr[stream->buf_num]);
		if (!stream->buf_list[stream->buf_num]) {
			dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
					__func__, stream->buf_num);
			usb_free_stream_buffers(stream);
			return -ENOMEM;
		}

		dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
				__func__, stream->buf_num,
				stream->buf_list[stream->buf_num],
				(long long)stream->dma_addr[stream->buf_num]);
		memset(stream->buf_list[stream->buf_num], 0, size);
		stream->state |= USB_STATE_URB_BUF;
	}

	return 0;
}

int usb_urb_reconfig(struct usb_data_stream *stream,
		struct usb_data_stream_properties *props)
{
	int buf_size;

	if (!props)
		return 0;

	/* check allocated buffers are large enough for the request */
	if (props->type == USB_BULK) {
		buf_size = stream->props.u.bulk.buffersize;
	} else if (props->type == USB_ISOC) {
		buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
	} else {
		dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
				KBUILD_MODNAME, props->type);
		return -EINVAL;
	}

	if (stream->buf_num < props->count || stream->buf_size < buf_size) {
		dev_err(&stream->udev->dev,
				"%s: cannot reconfigure as allocated buffers are too small\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}

	/* check if all fields are same */
	if (stream->props.type == props->type &&
			stream->props.count == props->count &&
			stream->props.endpoint == props->endpoint) {
		if (props->type == USB_BULK &&
				props->u.bulk.buffersize ==
				stream->props.u.bulk.buffersize)
			return 0;
		else if (props->type == USB_ISOC &&
				props->u.isoc.framesperurb ==
				stream->props.u.isoc.framesperurb &&
				props->u.isoc.framesize ==
				stream->props.u.isoc.framesize &&
				props->u.isoc.interval ==
				stream->props.u.isoc.interval)
			return 0;
	}

	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);

	usb_urb_free_urbs(stream);
	memcpy(&stream->props, props, sizeof(*props));
	if (props->type == USB_BULK)
		return usb_urb_alloc_bulk_urbs(stream);
	else if (props->type == USB_ISOC)
		return usb_urb_alloc_isoc_urbs(stream);

	return 0;
}

int usb_urb_initv2(struct usb_data_stream *stream,
		const struct usb_data_stream_properties *props)
{
	int ret;

	if (!stream || !props)
		return -EINVAL;

	memcpy(&stream->props, props, sizeof(*props));

	if (!stream->complete) {
		dev_err(&stream->udev->dev,
				"%s: there is no data callback - this doesn't make sense\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}

	switch (stream->props.type) {
	case USB_BULK:
		ret = usb_alloc_stream_buffers(stream, stream->props.count,
				stream->props.u.bulk.buffersize);
		if (ret < 0)
			return ret;

		return usb_urb_alloc_bulk_urbs(stream);
	case USB_ISOC:
		ret = usb_alloc_stream_buffers(stream, stream->props.count,
				stream->props.u.isoc.framesize *
				stream->props.u.isoc.framesperurb);
		if (ret < 0)
			return ret;

		return usb_urb_alloc_isoc_urbs(stream);
	default:
		dev_err(&stream->udev->dev,
				"%s: unknown urb-type for data transfer\n",
				KBUILD_MODNAME);
		return -EINVAL;
	}
}

int usb_urb_exitv2(struct usb_data_stream *stream)
{
	usb_urb_free_urbs(stream);
	usb_free_stream_buffers(stream);

	return 0;
}
Commit	Line	Data
c79b339f AP	1	/* usb-urb.c is part of the DVB USB library.
c79b339f AP	2	*
99e44da7	3	* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
c79b339f AP	4	* see dvb-usb-init.c for copyright information.
	5	*
	6	* This file keeps functions for initializing and handling the
	7	* BULK and ISOC USB data transfers in a generic way.
	8	* Can be used for DVB-only and also, that's the plan, for
	9	* Hybrid USB devices (analog and DVB).
	10	*/
	11	#include "dvb_usb_common.h"
	12
	13	/* URB stuff for streaming */
bce1c029 AP	14
	15	int usb_urb_reconfig(struct usb_data_stream *stream,
	16	struct usb_data_stream_properties *props);
	17
c79b339f AP	18	static void usb_urb_complete(struct urb *urb)
	19	{
	20	struct usb_data_stream *stream = urb->context;
	21	int ptype = usb_pipetype(urb->pipe);
	22	int i;
	23	u8 *b;
	24
6d7cfec4 AP	25	dev_dbg_ratelimited(&stream->udev->dev,
6d7cfec4 AP	26	"%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
7fa8694a	27	__func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
23d8e63a AP	28	urb->status, urb->actual_length,
	29	urb->transfer_buffer_length,
	30	urb->number_of_packets, urb->error_count);
c79b339f AP	31
c79b339f AP	32	switch (urb->status) {
4e60d951 AP	33	case 0: /* success */
	34	case -ETIMEDOUT: /* NAK */
	35	break;
	36	case -ECONNRESET: /* kill */
	37	case -ENOENT:
	38	case -ESHUTDOWN:
	39	return;
	40	default: /* error */
7fa8694a AP	41	dev_dbg_ratelimited(&stream->udev->dev,
7fa8694a AP	42	"%s: urb completition failed=%d\n",
d10d1b9a	43	__func__, urb->status);
4e60d951	44	break;
c79b339f AP	45	}
	46
	47	b = (u8 *) urb->transfer_buffer;
	48	switch (ptype) {
4e60d951 AP	49	case PIPE_ISOCHRONOUS:
	50	for (i = 0; i < urb->number_of_packets; i++) {
	51	if (urb->iso_frame_desc[i].status != 0)
6d7cfec4 AP	52	dev_dbg(&stream->udev->dev,
6d7cfec4 AP	53	"%s: iso frame descriptor has an error=%d\n",
d10d1b9a	54	__func__,
15072bba	55	urb->iso_frame_desc[i].status);
4e60d951 AP	56	else if (urb->iso_frame_desc[i].actual_length > 0)
	57	stream->complete(stream,
	58	b + urb->iso_frame_desc[i].offset,
	59	urb->iso_frame_desc[i].actual_length);
	60
	61	urb->iso_frame_desc[i].status = 0;
	62	urb->iso_frame_desc[i].actual_length = 0;
	63	}
4e60d951 AP	64	break;
	65	case PIPE_BULK:
	66	if (urb->actual_length > 0)
	67	stream->complete(stream, b, urb->actual_length);
	68	break;
	69	default:
6d7cfec4 AP	70	dev_err(&stream->udev->dev,
	71	"%s: unknown endpoint type in completition handler\n",
	72	KBUILD_MODNAME);
4e60d951	73	return;
c79b339f	74	}
4e60d951	75	usb_submit_urb(urb, GFP_ATOMIC);
c79b339f AP	76	}
c79b339f AP	77
59784343	78	int usb_urb_killv2(struct usb_data_stream *stream)
c79b339f AP	79	{
	80	int i;
	81	for (i = 0; i < stream->urbs_submitted; i++) {
d10d1b9a	82	dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
c79b339f AP	83	/* stop the URB */
	84	usb_kill_urb(stream->urb_list[i]);
	85	}
	86	stream->urbs_submitted = 0;
	87	return 0;
	88	}
	89
59784343	90	int usb_urb_submitv2(struct usb_data_stream *stream,
bce1c029	91	struct usb_data_stream_properties *props)
c79b339f	92	{
4e60d951	93	int i, ret;
bce1c029 AP	94
	95	if (props) {
	96	ret = usb_urb_reconfig(stream, props);
	97	if (ret < 0)
	98	return ret;
	99	}
	100
c79b339f	101	for (i = 0; i < stream->urbs_initialized; i++) {
d10d1b9a	102	dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
4e60d951 AP	103	ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
4e60d951 AP	104	if (ret) {
6d7cfec4 AP	105	dev_err(&stream->udev->dev,
6d7cfec4 AP	106	"%s: could not submit urb no. %d - get them all back\n",
d10d1b9a	107	KBUILD_MODNAME, i);
59784343	108	usb_urb_killv2(stream);
c79b339f AP	109	return ret;
	110	}
	111	stream->urbs_submitted++;
	112	}
	113	return 0;
	114	}
	115
691a5502	116	static int usb_urb_free_urbs(struct usb_data_stream *stream)
c79b339f	117	{
bce1c029	118	int i;
c79b339f	119
59784343	120	usb_urb_killv2(stream);
c79b339f	121
831511bd AP	122	for (i = stream->urbs_initialized - 1; i >= 0; i--) {
831511bd AP	123	if (stream->urb_list[i]) {
d10d1b9a AP	124	dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
d10d1b9a AP	125	__func__, i);
bce1c029 AP	126	/* free the URBs */
bce1c029 AP	127	usb_free_urb(stream->urb_list[i]);
c79b339f	128	}
c79b339f	129	}
bce1c029	130	stream->urbs_initialized = 0;
c79b339f AP	131
	132	return 0;
	133	}
	134
bce1c029	135	static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
c79b339f AP	136	{
	137	int i, j;
	138
c79b339f AP	139	/* allocate the URBs */
c79b339f AP	140	for (i = 0; i < stream->props.count; i++) {
d10d1b9a	141	dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
c79b339f AP	142	stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
c79b339f AP	143	if (!stream->urb_list[i]) {
d10d1b9a	144	dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
c79b339f AP	145	for (j = 0; j < i; j++)
	146	usb_free_urb(stream->urb_list[j]);
	147	return -ENOMEM;
	148	}
bce1c029 AP	149	usb_fill_bulk_urb(stream->urb_list[i],
bce1c029 AP	150	stream->udev,
4e60d951	151	usb_rcvbulkpipe(stream->udev,
bce1c029	152	stream->props.endpoint),
c79b339f AP	153	stream->buf_list[i],
	154	stream->props.u.bulk.buffersize,
	155	usb_urb_complete, stream);
	156
	157	stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
	158	stream->urb_list[i]->transfer_dma = stream->dma_addr[i];
	159	stream->urbs_initialized++;
	160	}
	161	return 0;
	162	}
	163
bce1c029	164	static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
c79b339f	165	{
4e60d951	166	int i, j;
c79b339f	167
c79b339f AP	168	/* allocate the URBs */
	169	for (i = 0; i < stream->props.count; i++) {
	170	struct urb *urb;
	171	int frame_offset = 0;
d10d1b9a	172	dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
4e60d951 AP	173	stream->urb_list[i] = usb_alloc_urb(
4e60d951 AP	174	stream->props.u.isoc.framesperurb, GFP_ATOMIC);
c79b339f	175	if (!stream->urb_list[i]) {
d10d1b9a	176	dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
c79b339f AP	177	for (j = 0; j < i; j++)
	178	usb_free_urb(stream->urb_list[j]);
	179	return -ENOMEM;
	180	}
	181
	182	urb = stream->urb_list[i];
	183
	184	urb->dev = stream->udev;
	185	urb->context = stream;
	186	urb->complete = usb_urb_complete;
4e60d951 AP	187	urb->pipe = usb_rcvisocpipe(stream->udev,
4e60d951 AP	188	stream->props.endpoint);
c79b339f AP	189	urb->transfer_flags = URB_ISO_ASAP \| URB_NO_TRANSFER_DMA_MAP;
	190	urb->interval = stream->props.u.isoc.interval;
	191	urb->number_of_packets = stream->props.u.isoc.framesperurb;
bce1c029 AP	192	urb->transfer_buffer_length = stream->props.u.isoc.framesize *
bce1c029 AP	193	stream->props.u.isoc.framesperurb;
c79b339f AP	194	urb->transfer_buffer = stream->buf_list[i];
	195	urb->transfer_dma = stream->dma_addr[i];
	196
	197	for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
	198	urb->iso_frame_desc[j].offset = frame_offset;
4e60d951 AP	199	urb->iso_frame_desc[j].length =
4e60d951 AP	200	stream->props.u.isoc.framesize;
c79b339f AP	201	frame_offset += stream->props.u.isoc.framesize;
	202	}
	203
	204	stream->urbs_initialized++;
	205	}
	206	return 0;
	207	}
	208
691a5502	209	static int usb_free_stream_buffers(struct usb_data_stream *stream)
bce1c029 AP	210	{
	211	if (stream->state & USB_STATE_URB_BUF) {
	212	while (stream->buf_num) {
	213	stream->buf_num--;
d10d1b9a AP	214	dev_dbg(&stream->udev->dev, "%s: free buf=%d\n",
d10d1b9a AP	215	__func__, stream->buf_num);
bce1c029 AP	216	usb_free_coherent(stream->udev, stream->buf_size,
	217	stream->buf_list[stream->buf_num],
	218	stream->dma_addr[stream->buf_num]);
	219	}
	220	}
	221
	222	stream->state &= ~USB_STATE_URB_BUF;
	223
	224	return 0;
	225	}
	226
691a5502 MCC	227	static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
691a5502 MCC	228	unsigned long size)
bce1c029 AP	229	{
	230	stream->buf_num = 0;
	231	stream->buf_size = size;
	232
6d7cfec4 AP	233	dev_dbg(&stream->udev->dev,
	234	"%s: all in all I will use %lu bytes for streaming\n",
	235	__func__, num * size);
bce1c029 AP	236
bce1c029 AP	237	for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
bce1c029 AP	238	stream->buf_list[stream->buf_num] = usb_alloc_coherent(
	239	stream->udev, size, GFP_ATOMIC,
	240	&stream->dma_addr[stream->buf_num]);
831511bd	241	if (!stream->buf_list[stream->buf_num]) {
d10d1b9a AP	242	dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
d10d1b9a AP	243	__func__, stream->buf_num);
bce1c029 AP	244	usb_free_stream_buffers(stream);
	245	return -ENOMEM;
	246	}
15072bba	247
d10d1b9a AP	248	dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
d10d1b9a AP	249	__func__, stream->buf_num,
bce1c029 AP	250	stream->buf_list[stream->buf_num],
	251	(long long)stream->dma_addr[stream->buf_num]);
	252	memset(stream->buf_list[stream->buf_num], 0, size);
	253	stream->state \|= USB_STATE_URB_BUF;
	254	}
bce1c029 AP	255
	256	return 0;
	257	}
	258
	259	int usb_urb_reconfig(struct usb_data_stream *stream,
	260	struct usb_data_stream_properties *props)
	261	{
	262	int buf_size;
	263
831511bd	264	if (!props)
bce1c029 AP	265	return 0;
	266
	267	/* check allocated buffers are large enough for the request */
15072bba	268	if (props->type == USB_BULK) {
bce1c029	269	buf_size = stream->props.u.bulk.buffersize;
15072bba	270	} else if (props->type == USB_ISOC) {
bce1c029	271	buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
15072bba	272	} else {
d10d1b9a AP	273	dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
d10d1b9a AP	274	KBUILD_MODNAME, props->type);
bce1c029	275	return -EINVAL;
15072bba	276	}
bce1c029 AP	277
bce1c029 AP	278	if (stream->buf_num < props->count \|\| stream->buf_size < buf_size) {
6d7cfec4 AP	279	dev_err(&stream->udev->dev,
6d7cfec4 AP	280	"%s: cannot reconfigure as allocated buffers are too small\n",
d10d1b9a	281	KBUILD_MODNAME);
bce1c029 AP	282	return -EINVAL;
	283	}
	284
	285	/* check if all fields are same */
	286	if (stream->props.type == props->type &&
	287	stream->props.count == props->count &&
	288	stream->props.endpoint == props->endpoint) {
	289	if (props->type == USB_BULK &&
	290	props->u.bulk.buffersize ==
	291	stream->props.u.bulk.buffersize)
	292	return 0;
	293	else if (props->type == USB_ISOC &&
	294	props->u.isoc.framesperurb ==
	295	stream->props.u.isoc.framesperurb &&
	296	props->u.isoc.framesize ==
	297	stream->props.u.isoc.framesize &&
	298	props->u.isoc.interval ==
	299	stream->props.u.isoc.interval)
	300	return 0;
	301	}
	302
d10d1b9a	303	dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);
bce1c029 AP	304
	305	usb_urb_free_urbs(stream);
	306	memcpy(&stream->props, props, sizeof(*props));
	307	if (props->type == USB_BULK)
	308	return usb_urb_alloc_bulk_urbs(stream);
	309	else if (props->type == USB_ISOC)
	310	return usb_urb_alloc_isoc_urbs(stream);
	311
	312	return 0;
	313	}
	314
59784343	315	int usb_urb_initv2(struct usb_data_stream *stream,
6400a8c5	316	const struct usb_data_stream_properties *props)
c79b339f	317	{
bce1c029 AP	318	int ret;
bce1c029 AP	319
831511bd	320	if (!stream \|\| !props)
c79b339f AP	321	return -EINVAL;
	322
	323	memcpy(&stream->props, props, sizeof(*props));
	324
831511bd	325	if (!stream->complete) {
6d7cfec4 AP	326	dev_err(&stream->udev->dev,
	327	"%s: there is no data callback - this doesn't make sense\n",
	328	KBUILD_MODNAME);
c79b339f AP	329	return -EINVAL;
	330	}
	331
	332	switch (stream->props.type) {
4e60d951	333	case USB_BULK:
bce1c029 AP	334	ret = usb_alloc_stream_buffers(stream, stream->props.count,
	335	stream->props.u.bulk.buffersize);
	336	if (ret < 0)
	337	return ret;
	338
	339	return usb_urb_alloc_bulk_urbs(stream);
4e60d951	340	case USB_ISOC:
bce1c029 AP	341	ret = usb_alloc_stream_buffers(stream, stream->props.count,
	342	stream->props.u.isoc.framesize *
	343	stream->props.u.isoc.framesperurb);
	344	if (ret < 0)
	345	return ret;
	346
	347	return usb_urb_alloc_isoc_urbs(stream);
4e60d951	348	default:
6d7cfec4 AP	349	dev_err(&stream->udev->dev,
	350	"%s: unknown urb-type for data transfer\n",
	351	KBUILD_MODNAME);
4e60d951	352	return -EINVAL;
c79b339f AP	353	}
	354	}
	355
59784343	356	int usb_urb_exitv2(struct usb_data_stream *stream)
c79b339f	357	{
bce1c029	358	usb_urb_free_urbs(stream);
c79b339f	359	usb_free_stream_buffers(stream);
bce1c029	360
c79b339f AP	361	return 0;
c79b339f AP	362	}