1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
2786baecfSMauro Carvalho Chehab /* usb-urb.c is part of the DVB USB library.
3786baecfSMauro Carvalho Chehab *
499e44da7SPatrick Boettcher * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
5786baecfSMauro Carvalho Chehab * see dvb-usb-init.c for copyright information.
6786baecfSMauro Carvalho Chehab *
7786baecfSMauro Carvalho Chehab * This file keeps functions for initializing and handling the
8786baecfSMauro Carvalho Chehab * BULK and ISOC USB data transfers in a generic way.
9786baecfSMauro Carvalho Chehab * Can be used for DVB-only and also, that's the plan, for
10786baecfSMauro Carvalho Chehab * Hybrid USB devices (analog and DVB).
11786baecfSMauro Carvalho Chehab */
12786baecfSMauro Carvalho Chehab #include "dvb_usb_common.h"
13786baecfSMauro Carvalho Chehab
14786baecfSMauro Carvalho Chehab /* URB stuff for streaming */
15786baecfSMauro Carvalho Chehab
16786baecfSMauro Carvalho Chehab int usb_urb_reconfig(struct usb_data_stream *stream,
17786baecfSMauro Carvalho Chehab struct usb_data_stream_properties *props);
18786baecfSMauro Carvalho Chehab
usb_urb_complete(struct urb * urb)19786baecfSMauro Carvalho Chehab static void usb_urb_complete(struct urb *urb)
20786baecfSMauro Carvalho Chehab {
21786baecfSMauro Carvalho Chehab struct usb_data_stream *stream = urb->context;
22786baecfSMauro Carvalho Chehab int ptype = usb_pipetype(urb->pipe);
23786baecfSMauro Carvalho Chehab int i;
24786baecfSMauro Carvalho Chehab u8 *b;
25786baecfSMauro Carvalho Chehab
266d7cfec4SAntti Palosaari dev_dbg_ratelimited(&stream->udev->dev,
276d7cfec4SAntti Palosaari "%s: %s urb completed status=%d length=%d/%d pack_num=%d errors=%d\n",
287fa8694aSAntti Palosaari __func__, ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
29786baecfSMauro Carvalho Chehab urb->status, urb->actual_length,
30786baecfSMauro Carvalho Chehab urb->transfer_buffer_length,
31786baecfSMauro Carvalho Chehab urb->number_of_packets, urb->error_count);
32786baecfSMauro Carvalho Chehab
33786baecfSMauro Carvalho Chehab switch (urb->status) {
34786baecfSMauro Carvalho Chehab case 0: /* success */
35786baecfSMauro Carvalho Chehab case -ETIMEDOUT: /* NAK */
36786baecfSMauro Carvalho Chehab break;
37786baecfSMauro Carvalho Chehab case -ECONNRESET: /* kill */
38786baecfSMauro Carvalho Chehab case -ENOENT:
39786baecfSMauro Carvalho Chehab case -ESHUTDOWN:
40786baecfSMauro Carvalho Chehab return;
41786baecfSMauro Carvalho Chehab default: /* error */
427fa8694aSAntti Palosaari dev_dbg_ratelimited(&stream->udev->dev,
433c8496e5SColin Ian King "%s: urb completion failed=%d\n",
44786baecfSMauro Carvalho Chehab __func__, urb->status);
45786baecfSMauro Carvalho Chehab break;
46786baecfSMauro Carvalho Chehab }
47786baecfSMauro Carvalho Chehab
48786baecfSMauro Carvalho Chehab b = (u8 *) urb->transfer_buffer;
49786baecfSMauro Carvalho Chehab switch (ptype) {
50786baecfSMauro Carvalho Chehab case PIPE_ISOCHRONOUS:
51786baecfSMauro Carvalho Chehab for (i = 0; i < urb->number_of_packets; i++) {
52786baecfSMauro Carvalho Chehab if (urb->iso_frame_desc[i].status != 0)
536d7cfec4SAntti Palosaari dev_dbg(&stream->udev->dev,
546d7cfec4SAntti Palosaari "%s: iso frame descriptor has an error=%d\n",
55786baecfSMauro Carvalho Chehab __func__,
56786baecfSMauro Carvalho Chehab urb->iso_frame_desc[i].status);
57786baecfSMauro Carvalho Chehab else if (urb->iso_frame_desc[i].actual_length > 0)
58786baecfSMauro Carvalho Chehab stream->complete(stream,
59786baecfSMauro Carvalho Chehab b + urb->iso_frame_desc[i].offset,
60786baecfSMauro Carvalho Chehab urb->iso_frame_desc[i].actual_length);
61786baecfSMauro Carvalho Chehab
62786baecfSMauro Carvalho Chehab urb->iso_frame_desc[i].status = 0;
63786baecfSMauro Carvalho Chehab urb->iso_frame_desc[i].actual_length = 0;
64786baecfSMauro Carvalho Chehab }
65786baecfSMauro Carvalho Chehab break;
66786baecfSMauro Carvalho Chehab case PIPE_BULK:
67786baecfSMauro Carvalho Chehab if (urb->actual_length > 0)
68786baecfSMauro Carvalho Chehab stream->complete(stream, b, urb->actual_length);
69786baecfSMauro Carvalho Chehab break;
70786baecfSMauro Carvalho Chehab default:
716d7cfec4SAntti Palosaari dev_err(&stream->udev->dev,
723c8496e5SColin Ian King "%s: unknown endpoint type in completion handler\n",
736d7cfec4SAntti Palosaari KBUILD_MODNAME);
74786baecfSMauro Carvalho Chehab return;
75786baecfSMauro Carvalho Chehab }
76786baecfSMauro Carvalho Chehab usb_submit_urb(urb, GFP_ATOMIC);
77786baecfSMauro Carvalho Chehab }
78786baecfSMauro Carvalho Chehab
usb_urb_killv2(struct usb_data_stream * stream)79786baecfSMauro Carvalho Chehab int usb_urb_killv2(struct usb_data_stream *stream)
80786baecfSMauro Carvalho Chehab {
81786baecfSMauro Carvalho Chehab int i;
82786baecfSMauro Carvalho Chehab for (i = 0; i < stream->urbs_submitted; i++) {
83786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: kill urb=%d\n", __func__, i);
84786baecfSMauro Carvalho Chehab /* stop the URB */
85786baecfSMauro Carvalho Chehab usb_kill_urb(stream->urb_list[i]);
86786baecfSMauro Carvalho Chehab }
87786baecfSMauro Carvalho Chehab stream->urbs_submitted = 0;
88786baecfSMauro Carvalho Chehab return 0;
89786baecfSMauro Carvalho Chehab }
90786baecfSMauro Carvalho Chehab
usb_urb_submitv2(struct usb_data_stream * stream,struct usb_data_stream_properties * props)91786baecfSMauro Carvalho Chehab int usb_urb_submitv2(struct usb_data_stream *stream,
92786baecfSMauro Carvalho Chehab struct usb_data_stream_properties *props)
93786baecfSMauro Carvalho Chehab {
94786baecfSMauro Carvalho Chehab int i, ret;
95786baecfSMauro Carvalho Chehab
96786baecfSMauro Carvalho Chehab if (props) {
97786baecfSMauro Carvalho Chehab ret = usb_urb_reconfig(stream, props);
98786baecfSMauro Carvalho Chehab if (ret < 0)
99786baecfSMauro Carvalho Chehab return ret;
100786baecfSMauro Carvalho Chehab }
101786baecfSMauro Carvalho Chehab
102786baecfSMauro Carvalho Chehab for (i = 0; i < stream->urbs_initialized; i++) {
103786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: submit urb=%d\n", __func__, i);
104786baecfSMauro Carvalho Chehab ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC);
105786baecfSMauro Carvalho Chehab if (ret) {
1066d7cfec4SAntti Palosaari dev_err(&stream->udev->dev,
1076d7cfec4SAntti Palosaari "%s: could not submit urb no. %d - get them all back\n",
108786baecfSMauro Carvalho Chehab KBUILD_MODNAME, i);
109786baecfSMauro Carvalho Chehab usb_urb_killv2(stream);
110786baecfSMauro Carvalho Chehab return ret;
111786baecfSMauro Carvalho Chehab }
112786baecfSMauro Carvalho Chehab stream->urbs_submitted++;
113786baecfSMauro Carvalho Chehab }
114786baecfSMauro Carvalho Chehab return 0;
115786baecfSMauro Carvalho Chehab }
116786baecfSMauro Carvalho Chehab
usb_urb_free_urbs(struct usb_data_stream * stream)117691a5502SMauro Carvalho Chehab static int usb_urb_free_urbs(struct usb_data_stream *stream)
118786baecfSMauro Carvalho Chehab {
119786baecfSMauro Carvalho Chehab int i;
120786baecfSMauro Carvalho Chehab
121786baecfSMauro Carvalho Chehab usb_urb_killv2(stream);
122786baecfSMauro Carvalho Chehab
123786baecfSMauro Carvalho Chehab for (i = stream->urbs_initialized - 1; i >= 0; i--) {
124786baecfSMauro Carvalho Chehab if (stream->urb_list[i]) {
125786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: free urb=%d\n",
126786baecfSMauro Carvalho Chehab __func__, i);
127786baecfSMauro Carvalho Chehab /* free the URBs */
128786baecfSMauro Carvalho Chehab usb_free_urb(stream->urb_list[i]);
129786baecfSMauro Carvalho Chehab }
130786baecfSMauro Carvalho Chehab }
131786baecfSMauro Carvalho Chehab stream->urbs_initialized = 0;
132786baecfSMauro Carvalho Chehab
133786baecfSMauro Carvalho Chehab return 0;
134786baecfSMauro Carvalho Chehab }
135786baecfSMauro Carvalho Chehab
usb_urb_alloc_bulk_urbs(struct usb_data_stream * stream)136786baecfSMauro Carvalho Chehab static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream)
137786baecfSMauro Carvalho Chehab {
138786baecfSMauro Carvalho Chehab int i, j;
139786baecfSMauro Carvalho Chehab
140786baecfSMauro Carvalho Chehab /* allocate the URBs */
141786baecfSMauro Carvalho Chehab for (i = 0; i < stream->props.count; i++) {
142786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
143786baecfSMauro Carvalho Chehab stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
144786baecfSMauro Carvalho Chehab if (!stream->urb_list[i]) {
145786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
146786baecfSMauro Carvalho Chehab for (j = 0; j < i; j++)
147786baecfSMauro Carvalho Chehab usb_free_urb(stream->urb_list[j]);
148786baecfSMauro Carvalho Chehab return -ENOMEM;
149786baecfSMauro Carvalho Chehab }
150786baecfSMauro Carvalho Chehab usb_fill_bulk_urb(stream->urb_list[i],
151786baecfSMauro Carvalho Chehab stream->udev,
152786baecfSMauro Carvalho Chehab usb_rcvbulkpipe(stream->udev,
153786baecfSMauro Carvalho Chehab stream->props.endpoint),
154786baecfSMauro Carvalho Chehab stream->buf_list[i],
155786baecfSMauro Carvalho Chehab stream->props.u.bulk.buffersize,
156786baecfSMauro Carvalho Chehab usb_urb_complete, stream);
157786baecfSMauro Carvalho Chehab
158786baecfSMauro Carvalho Chehab stream->urbs_initialized++;
159786baecfSMauro Carvalho Chehab }
160786baecfSMauro Carvalho Chehab return 0;
161786baecfSMauro Carvalho Chehab }
162786baecfSMauro Carvalho Chehab
usb_urb_alloc_isoc_urbs(struct usb_data_stream * stream)163786baecfSMauro Carvalho Chehab static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream)
164786baecfSMauro Carvalho Chehab {
165786baecfSMauro Carvalho Chehab int i, j;
166786baecfSMauro Carvalho Chehab
167786baecfSMauro Carvalho Chehab /* allocate the URBs */
168786baecfSMauro Carvalho Chehab for (i = 0; i < stream->props.count; i++) {
169786baecfSMauro Carvalho Chehab struct urb *urb;
170786baecfSMauro Carvalho Chehab int frame_offset = 0;
171786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: alloc urb=%d\n", __func__, i);
172786baecfSMauro Carvalho Chehab stream->urb_list[i] = usb_alloc_urb(
173786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesperurb, GFP_ATOMIC);
174786baecfSMauro Carvalho Chehab if (!stream->urb_list[i]) {
175786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: failed\n", __func__);
176786baecfSMauro Carvalho Chehab for (j = 0; j < i; j++)
177786baecfSMauro Carvalho Chehab usb_free_urb(stream->urb_list[j]);
178786baecfSMauro Carvalho Chehab return -ENOMEM;
179786baecfSMauro Carvalho Chehab }
180786baecfSMauro Carvalho Chehab
181786baecfSMauro Carvalho Chehab urb = stream->urb_list[i];
182786baecfSMauro Carvalho Chehab
183786baecfSMauro Carvalho Chehab urb->dev = stream->udev;
184786baecfSMauro Carvalho Chehab urb->context = stream;
185786baecfSMauro Carvalho Chehab urb->complete = usb_urb_complete;
186786baecfSMauro Carvalho Chehab urb->pipe = usb_rcvisocpipe(stream->udev,
187786baecfSMauro Carvalho Chehab stream->props.endpoint);
188255095faSMalcolm Priestley urb->transfer_flags = URB_ISO_ASAP;
189786baecfSMauro Carvalho Chehab urb->interval = stream->props.u.isoc.interval;
190786baecfSMauro Carvalho Chehab urb->number_of_packets = stream->props.u.isoc.framesperurb;
191786baecfSMauro Carvalho Chehab urb->transfer_buffer_length = stream->props.u.isoc.framesize *
192786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesperurb;
193786baecfSMauro Carvalho Chehab urb->transfer_buffer = stream->buf_list[i];
194786baecfSMauro Carvalho Chehab
195786baecfSMauro Carvalho Chehab for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
196786baecfSMauro Carvalho Chehab urb->iso_frame_desc[j].offset = frame_offset;
197786baecfSMauro Carvalho Chehab urb->iso_frame_desc[j].length =
198786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesize;
199786baecfSMauro Carvalho Chehab frame_offset += stream->props.u.isoc.framesize;
200786baecfSMauro Carvalho Chehab }
201786baecfSMauro Carvalho Chehab
202786baecfSMauro Carvalho Chehab stream->urbs_initialized++;
203786baecfSMauro Carvalho Chehab }
204786baecfSMauro Carvalho Chehab return 0;
205786baecfSMauro Carvalho Chehab }
206786baecfSMauro Carvalho Chehab
usb_free_stream_buffers(struct usb_data_stream * stream)207691a5502SMauro Carvalho Chehab static int usb_free_stream_buffers(struct usb_data_stream *stream)
208786baecfSMauro Carvalho Chehab {
209786baecfSMauro Carvalho Chehab if (stream->state & USB_STATE_URB_BUF) {
210786baecfSMauro Carvalho Chehab while (stream->buf_num) {
211786baecfSMauro Carvalho Chehab stream->buf_num--;
212255095faSMalcolm Priestley kfree(stream->buf_list[stream->buf_num]);
213786baecfSMauro Carvalho Chehab }
214786baecfSMauro Carvalho Chehab }
215786baecfSMauro Carvalho Chehab
216786baecfSMauro Carvalho Chehab stream->state &= ~USB_STATE_URB_BUF;
217786baecfSMauro Carvalho Chehab
218786baecfSMauro Carvalho Chehab return 0;
219786baecfSMauro Carvalho Chehab }
220786baecfSMauro Carvalho Chehab
usb_alloc_stream_buffers(struct usb_data_stream * stream,int num,unsigned long size)221691a5502SMauro Carvalho Chehab static int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num,
222786baecfSMauro Carvalho Chehab unsigned long size)
223786baecfSMauro Carvalho Chehab {
224786baecfSMauro Carvalho Chehab stream->buf_num = 0;
225786baecfSMauro Carvalho Chehab stream->buf_size = size;
226786baecfSMauro Carvalho Chehab
2276d7cfec4SAntti Palosaari dev_dbg(&stream->udev->dev,
2286d7cfec4SAntti Palosaari "%s: all in all I will use %lu bytes for streaming\n",
2296d7cfec4SAntti Palosaari __func__, num * size);
230786baecfSMauro Carvalho Chehab
231786baecfSMauro Carvalho Chehab for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
2321a0c10edSMauro Carvalho Chehab stream->buf_list[stream->buf_num] = kzalloc(size, GFP_ATOMIC);
233786baecfSMauro Carvalho Chehab if (!stream->buf_list[stream->buf_num]) {
234786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: alloc buf=%d failed\n",
235786baecfSMauro Carvalho Chehab __func__, stream->buf_num);
236786baecfSMauro Carvalho Chehab usb_free_stream_buffers(stream);
237786baecfSMauro Carvalho Chehab return -ENOMEM;
238786baecfSMauro Carvalho Chehab }
239786baecfSMauro Carvalho Chehab
240786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
241786baecfSMauro Carvalho Chehab __func__, stream->buf_num,
242786baecfSMauro Carvalho Chehab stream->buf_list[stream->buf_num],
243786baecfSMauro Carvalho Chehab (long long)stream->dma_addr[stream->buf_num]);
244786baecfSMauro Carvalho Chehab stream->state |= USB_STATE_URB_BUF;
245786baecfSMauro Carvalho Chehab }
246786baecfSMauro Carvalho Chehab
247786baecfSMauro Carvalho Chehab return 0;
248786baecfSMauro Carvalho Chehab }
249786baecfSMauro Carvalho Chehab
usb_urb_reconfig(struct usb_data_stream * stream,struct usb_data_stream_properties * props)250786baecfSMauro Carvalho Chehab int usb_urb_reconfig(struct usb_data_stream *stream,
251786baecfSMauro Carvalho Chehab struct usb_data_stream_properties *props)
252786baecfSMauro Carvalho Chehab {
253786baecfSMauro Carvalho Chehab int buf_size;
254786baecfSMauro Carvalho Chehab
255786baecfSMauro Carvalho Chehab if (!props)
256786baecfSMauro Carvalho Chehab return 0;
257786baecfSMauro Carvalho Chehab
258786baecfSMauro Carvalho Chehab /* check allocated buffers are large enough for the request */
259786baecfSMauro Carvalho Chehab if (props->type == USB_BULK) {
260786baecfSMauro Carvalho Chehab buf_size = stream->props.u.bulk.buffersize;
261786baecfSMauro Carvalho Chehab } else if (props->type == USB_ISOC) {
262786baecfSMauro Carvalho Chehab buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb;
263786baecfSMauro Carvalho Chehab } else {
264786baecfSMauro Carvalho Chehab dev_err(&stream->udev->dev, "%s: invalid endpoint type=%d\n",
265786baecfSMauro Carvalho Chehab KBUILD_MODNAME, props->type);
266786baecfSMauro Carvalho Chehab return -EINVAL;
267786baecfSMauro Carvalho Chehab }
268786baecfSMauro Carvalho Chehab
269786baecfSMauro Carvalho Chehab if (stream->buf_num < props->count || stream->buf_size < buf_size) {
2706d7cfec4SAntti Palosaari dev_err(&stream->udev->dev,
2716d7cfec4SAntti Palosaari "%s: cannot reconfigure as allocated buffers are too small\n",
272786baecfSMauro Carvalho Chehab KBUILD_MODNAME);
273786baecfSMauro Carvalho Chehab return -EINVAL;
274786baecfSMauro Carvalho Chehab }
275786baecfSMauro Carvalho Chehab
276786baecfSMauro Carvalho Chehab /* check if all fields are same */
277786baecfSMauro Carvalho Chehab if (stream->props.type == props->type &&
278786baecfSMauro Carvalho Chehab stream->props.count == props->count &&
279786baecfSMauro Carvalho Chehab stream->props.endpoint == props->endpoint) {
280786baecfSMauro Carvalho Chehab if (props->type == USB_BULK &&
281786baecfSMauro Carvalho Chehab props->u.bulk.buffersize ==
282786baecfSMauro Carvalho Chehab stream->props.u.bulk.buffersize)
283786baecfSMauro Carvalho Chehab return 0;
284786baecfSMauro Carvalho Chehab else if (props->type == USB_ISOC &&
285786baecfSMauro Carvalho Chehab props->u.isoc.framesperurb ==
286786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesperurb &&
287786baecfSMauro Carvalho Chehab props->u.isoc.framesize ==
288786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesize &&
289786baecfSMauro Carvalho Chehab props->u.isoc.interval ==
290786baecfSMauro Carvalho Chehab stream->props.u.isoc.interval)
291786baecfSMauro Carvalho Chehab return 0;
292786baecfSMauro Carvalho Chehab }
293786baecfSMauro Carvalho Chehab
294786baecfSMauro Carvalho Chehab dev_dbg(&stream->udev->dev, "%s: re-alloc urbs\n", __func__);
295786baecfSMauro Carvalho Chehab
296786baecfSMauro Carvalho Chehab usb_urb_free_urbs(stream);
297786baecfSMauro Carvalho Chehab memcpy(&stream->props, props, sizeof(*props));
298786baecfSMauro Carvalho Chehab if (props->type == USB_BULK)
299786baecfSMauro Carvalho Chehab return usb_urb_alloc_bulk_urbs(stream);
300786baecfSMauro Carvalho Chehab else if (props->type == USB_ISOC)
301786baecfSMauro Carvalho Chehab return usb_urb_alloc_isoc_urbs(stream);
302786baecfSMauro Carvalho Chehab
303786baecfSMauro Carvalho Chehab return 0;
304786baecfSMauro Carvalho Chehab }
305786baecfSMauro Carvalho Chehab
usb_urb_initv2(struct usb_data_stream * stream,const struct usb_data_stream_properties * props)306786baecfSMauro Carvalho Chehab int usb_urb_initv2(struct usb_data_stream *stream,
307786baecfSMauro Carvalho Chehab const struct usb_data_stream_properties *props)
308786baecfSMauro Carvalho Chehab {
309786baecfSMauro Carvalho Chehab int ret;
310786baecfSMauro Carvalho Chehab
311786baecfSMauro Carvalho Chehab if (!stream || !props)
312786baecfSMauro Carvalho Chehab return -EINVAL;
313786baecfSMauro Carvalho Chehab
314786baecfSMauro Carvalho Chehab memcpy(&stream->props, props, sizeof(*props));
315786baecfSMauro Carvalho Chehab
316786baecfSMauro Carvalho Chehab if (!stream->complete) {
3176d7cfec4SAntti Palosaari dev_err(&stream->udev->dev,
3186d7cfec4SAntti Palosaari "%s: there is no data callback - this doesn't make sense\n",
3196d7cfec4SAntti Palosaari KBUILD_MODNAME);
320786baecfSMauro Carvalho Chehab return -EINVAL;
321786baecfSMauro Carvalho Chehab }
322786baecfSMauro Carvalho Chehab
323786baecfSMauro Carvalho Chehab switch (stream->props.type) {
324786baecfSMauro Carvalho Chehab case USB_BULK:
325786baecfSMauro Carvalho Chehab ret = usb_alloc_stream_buffers(stream, stream->props.count,
326786baecfSMauro Carvalho Chehab stream->props.u.bulk.buffersize);
327786baecfSMauro Carvalho Chehab if (ret < 0)
328786baecfSMauro Carvalho Chehab return ret;
329786baecfSMauro Carvalho Chehab
330786baecfSMauro Carvalho Chehab return usb_urb_alloc_bulk_urbs(stream);
331786baecfSMauro Carvalho Chehab case USB_ISOC:
332786baecfSMauro Carvalho Chehab ret = usb_alloc_stream_buffers(stream, stream->props.count,
333786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesize *
334786baecfSMauro Carvalho Chehab stream->props.u.isoc.framesperurb);
335786baecfSMauro Carvalho Chehab if (ret < 0)
336786baecfSMauro Carvalho Chehab return ret;
337786baecfSMauro Carvalho Chehab
338786baecfSMauro Carvalho Chehab return usb_urb_alloc_isoc_urbs(stream);
339786baecfSMauro Carvalho Chehab default:
3406d7cfec4SAntti Palosaari dev_err(&stream->udev->dev,
3416d7cfec4SAntti Palosaari "%s: unknown urb-type for data transfer\n",
3426d7cfec4SAntti Palosaari KBUILD_MODNAME);
343786baecfSMauro Carvalho Chehab return -EINVAL;
344786baecfSMauro Carvalho Chehab }
345786baecfSMauro Carvalho Chehab }
346786baecfSMauro Carvalho Chehab
usb_urb_exitv2(struct usb_data_stream * stream)347786baecfSMauro Carvalho Chehab int usb_urb_exitv2(struct usb_data_stream *stream)
348786baecfSMauro Carvalho Chehab {
349786baecfSMauro Carvalho Chehab usb_urb_free_urbs(stream);
350786baecfSMauro Carvalho Chehab usb_free_stream_buffers(stream);
351786baecfSMauro Carvalho Chehab
352786baecfSMauro Carvalho Chehab return 0;
353786baecfSMauro Carvalho Chehab }
354