Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 1 | /* usb-urb.c is part of the DVB USB library. |
| 2 | * |
| 3 | * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de) |
| 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 */ |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 14 | |
| 15 | int usb_urb_reconfig(struct usb_data_stream *stream, |
| 16 | struct usb_data_stream_properties *props); |
| 17 | |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 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 | |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 25 | pr_debug("%s: %s urb completed status=%d length=%d/%d" \ |
| 26 | " pack_num=%d errors=%d\n", __func__, |
| 27 | ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk", |
| 28 | urb->status, urb->actual_length, |
| 29 | urb->transfer_buffer_length, |
| 30 | urb->number_of_packets, urb->error_count); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 31 | |
| 32 | switch (urb->status) { |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 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 */ |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 41 | pr_debug("%s: URB completition failed=%d\n", __func__, |
| 42 | urb->status); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 43 | break; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | b = (u8 *) urb->transfer_buffer; |
| 47 | switch (ptype) { |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 48 | case PIPE_ISOCHRONOUS: |
| 49 | for (i = 0; i < urb->number_of_packets; i++) { |
| 50 | if (urb->iso_frame_desc[i].status != 0) |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 51 | pr_debug("%s: iso frame descriptor has an " \ |
| 52 | "error=%d\n", __func__, |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 53 | urb->iso_frame_desc[i].status); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 54 | else if (urb->iso_frame_desc[i].actual_length > 0) |
| 55 | stream->complete(stream, |
| 56 | b + urb->iso_frame_desc[i].offset, |
| 57 | urb->iso_frame_desc[i].actual_length); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 58 | |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 59 | urb->iso_frame_desc[i].status = 0; |
| 60 | urb->iso_frame_desc[i].actual_length = 0; |
| 61 | } |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 62 | break; |
| 63 | case PIPE_BULK: |
| 64 | if (urb->actual_length > 0) |
| 65 | stream->complete(stream, b, urb->actual_length); |
| 66 | break; |
| 67 | default: |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 68 | pr_err("%s: unknown endpoint type in completition handler", |
| 69 | KBUILD_MODNAME); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 70 | return; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 71 | } |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 72 | usb_submit_urb(urb, GFP_ATOMIC); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | int usb_urb_kill(struct usb_data_stream *stream) |
| 76 | { |
| 77 | int i; |
| 78 | for (i = 0; i < stream->urbs_submitted; i++) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 79 | pr_debug("%s: kill URB=%d\n", __func__, i); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 80 | /* stop the URB */ |
| 81 | usb_kill_urb(stream->urb_list[i]); |
| 82 | } |
| 83 | stream->urbs_submitted = 0; |
| 84 | return 0; |
| 85 | } |
| 86 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 87 | int usb_urb_submit(struct usb_data_stream *stream, |
| 88 | struct usb_data_stream_properties *props) |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 89 | { |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 90 | int i, ret; |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 91 | |
| 92 | if (props) { |
| 93 | ret = usb_urb_reconfig(stream, props); |
| 94 | if (ret < 0) |
| 95 | return ret; |
| 96 | } |
| 97 | |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 98 | for (i = 0; i < stream->urbs_initialized; i++) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 99 | pr_debug("%s: submit URB=%d\n", __func__, i); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 100 | ret = usb_submit_urb(stream->urb_list[i], GFP_ATOMIC); |
| 101 | if (ret) { |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 102 | pr_err("%s: could not submit URB no. %d - get them " \ |
| 103 | "all back", KBUILD_MODNAME, i); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 104 | usb_urb_kill(stream); |
| 105 | return ret; |
| 106 | } |
| 107 | stream->urbs_submitted++; |
| 108 | } |
| 109 | return 0; |
| 110 | } |
| 111 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 112 | int usb_urb_free_urbs(struct usb_data_stream *stream) |
| 113 | { |
| 114 | int i; |
| 115 | |
| 116 | usb_urb_kill(stream); |
| 117 | |
| 118 | for (i = 0; i < stream->urbs_initialized; i++) { |
| 119 | if (stream->urb_list[i] != NULL) { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 120 | pr_debug("%s: free URB=%d\n", __func__, i); |
| 121 | /* free the URBs */ |
| 122 | usb_free_urb(stream->urb_list[i]); |
| 123 | } |
| 124 | } |
| 125 | stream->urbs_initialized = 0; |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static int usb_urb_alloc_bulk_urbs(struct usb_data_stream *stream) |
| 131 | { |
| 132 | int i, j; |
| 133 | |
| 134 | /* allocate the URBs */ |
| 135 | for (i = 0; i < stream->props.count; i++) { |
| 136 | pr_debug("%s: alloc URB=%d\n", __func__, i); |
| 137 | stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); |
| 138 | if (!stream->urb_list[i]) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 139 | pr_debug("%s: failed\n", __func__); |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 140 | for (j = 0; j < i; j++) |
| 141 | usb_free_urb(stream->urb_list[j]); |
| 142 | return -ENOMEM; |
| 143 | } |
| 144 | usb_fill_bulk_urb(stream->urb_list[i], |
| 145 | stream->udev, |
| 146 | usb_rcvbulkpipe(stream->udev, |
| 147 | stream->props.endpoint), |
| 148 | stream->buf_list[i], |
| 149 | stream->props.u.bulk.buffersize, |
| 150 | usb_urb_complete, stream); |
| 151 | |
| 152 | stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
| 153 | stream->urb_list[i]->transfer_dma = stream->dma_addr[i]; |
| 154 | stream->urbs_initialized++; |
| 155 | } |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | static int usb_urb_alloc_isoc_urbs(struct usb_data_stream *stream) |
| 160 | { |
| 161 | int i, j; |
| 162 | |
| 163 | /* allocate the URBs */ |
| 164 | for (i = 0; i < stream->props.count; i++) { |
| 165 | struct urb *urb; |
| 166 | int frame_offset = 0; |
| 167 | pr_debug("%s: alloc URB=%d\n", __func__, i); |
| 168 | stream->urb_list[i] = usb_alloc_urb( |
| 169 | stream->props.u.isoc.framesperurb, GFP_ATOMIC); |
| 170 | if (!stream->urb_list[i]) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 171 | pr_debug("%s: failed\n", __func__); |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 172 | for (j = 0; j < i; j++) |
| 173 | usb_free_urb(stream->urb_list[j]); |
| 174 | return -ENOMEM; |
| 175 | } |
| 176 | |
| 177 | urb = stream->urb_list[i]; |
| 178 | |
| 179 | urb->dev = stream->udev; |
| 180 | urb->context = stream; |
| 181 | urb->complete = usb_urb_complete; |
| 182 | urb->pipe = usb_rcvisocpipe(stream->udev, |
| 183 | stream->props.endpoint); |
| 184 | urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; |
| 185 | urb->interval = stream->props.u.isoc.interval; |
| 186 | urb->number_of_packets = stream->props.u.isoc.framesperurb; |
| 187 | urb->transfer_buffer_length = stream->props.u.isoc.framesize * |
| 188 | stream->props.u.isoc.framesperurb; |
| 189 | urb->transfer_buffer = stream->buf_list[i]; |
| 190 | urb->transfer_dma = stream->dma_addr[i]; |
| 191 | |
| 192 | for (j = 0; j < stream->props.u.isoc.framesperurb; j++) { |
| 193 | urb->iso_frame_desc[j].offset = frame_offset; |
| 194 | urb->iso_frame_desc[j].length = |
| 195 | stream->props.u.isoc.framesize; |
| 196 | frame_offset += stream->props.u.isoc.framesize; |
| 197 | } |
| 198 | |
| 199 | stream->urbs_initialized++; |
| 200 | } |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | int usb_free_stream_buffers(struct usb_data_stream *stream) |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 205 | { |
| 206 | if (stream->state & USB_STATE_URB_BUF) { |
| 207 | while (stream->buf_num) { |
| 208 | stream->buf_num--; |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 209 | pr_debug("%s: free buf=%d\n", __func__, |
| 210 | stream->buf_num); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 211 | usb_free_coherent(stream->udev, stream->buf_size, |
| 212 | stream->buf_list[stream->buf_num], |
| 213 | stream->dma_addr[stream->buf_num]); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | stream->state &= ~USB_STATE_URB_BUF; |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 222 | int usb_alloc_stream_buffers(struct usb_data_stream *stream, int num, |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 223 | unsigned long size) |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 224 | { |
| 225 | stream->buf_num = 0; |
| 226 | stream->buf_size = size; |
| 227 | |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 228 | pr_debug("%s: all in all I will use %lu bytes for streaming\n", |
| 229 | __func__, num * size); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 230 | |
| 231 | for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 232 | pr_debug("%s: alloc buf=%d\n", __func__, stream->buf_num); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 233 | stream->buf_list[stream->buf_num] = usb_alloc_coherent( |
| 234 | stream->udev, size, GFP_ATOMIC, |
| 235 | &stream->dma_addr[stream->buf_num]); |
| 236 | if (stream->buf_list[stream->buf_num] == NULL) { |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 237 | pr_debug("%s: failed\n", __func__); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 238 | usb_free_stream_buffers(stream); |
| 239 | return -ENOMEM; |
| 240 | } |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 241 | |
| 242 | pr_debug("%s: buf %d: %p (dma %llu)\n", __func__, |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 243 | stream->buf_num, |
| 244 | stream->buf_list[stream->buf_num], |
| 245 | (long long)stream->dma_addr[stream->buf_num]); |
| 246 | memset(stream->buf_list[stream->buf_num], 0, size); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 247 | stream->state |= USB_STATE_URB_BUF; |
| 248 | } |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 253 | int usb_urb_reconfig(struct usb_data_stream *stream, |
| 254 | struct usb_data_stream_properties *props) |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 255 | { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 256 | int buf_size; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 257 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 258 | if (props == NULL) |
| 259 | return 0; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 260 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 261 | /* check allocated buffers are large enough for the request */ |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 262 | if (props->type == USB_BULK) { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 263 | buf_size = stream->props.u.bulk.buffersize; |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 264 | } else if (props->type == USB_ISOC) { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 265 | buf_size = props->u.isoc.framesize * props->u.isoc.framesperurb; |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 266 | } else { |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 267 | pr_err("%s: invalid endpoint type=%d", KBUILD_MODNAME, |
| 268 | props->type); |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 269 | return -EINVAL; |
Antti Palosaari | 15072bb | 2012-05-28 18:23:17 -0300 | [diff] [blame] | 270 | } |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 271 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 272 | if (stream->buf_num < props->count || stream->buf_size < buf_size) { |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 273 | pr_err("%s: cannot reconfigure as allocated buffers are too " \ |
| 274 | "small", KBUILD_MODNAME); |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 275 | return -EINVAL; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 276 | } |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 277 | |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 278 | /* check if all fields are same */ |
| 279 | if (stream->props.type == props->type && |
| 280 | stream->props.count == props->count && |
| 281 | stream->props.endpoint == props->endpoint) { |
| 282 | if (props->type == USB_BULK && |
| 283 | props->u.bulk.buffersize == |
| 284 | stream->props.u.bulk.buffersize) |
| 285 | return 0; |
| 286 | else if (props->type == USB_ISOC && |
| 287 | props->u.isoc.framesperurb == |
| 288 | stream->props.u.isoc.framesperurb && |
| 289 | props->u.isoc.framesize == |
| 290 | stream->props.u.isoc.framesize && |
| 291 | props->u.isoc.interval == |
| 292 | stream->props.u.isoc.interval) |
| 293 | return 0; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 294 | } |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 295 | |
| 296 | pr_debug("%s: re-alloc URBs\n", __func__); |
| 297 | |
| 298 | usb_urb_free_urbs(stream); |
| 299 | memcpy(&stream->props, props, sizeof(*props)); |
| 300 | if (props->type == USB_BULK) |
| 301 | return usb_urb_alloc_bulk_urbs(stream); |
| 302 | else if (props->type == USB_ISOC) |
| 303 | return usb_urb_alloc_isoc_urbs(stream); |
| 304 | |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 305 | return 0; |
| 306 | } |
| 307 | |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 308 | int usb_urb_init(struct usb_data_stream *stream, |
| 309 | struct usb_data_stream_properties *props) |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 310 | { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 311 | int ret; |
| 312 | |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 313 | if (stream == NULL || props == NULL) |
| 314 | return -EINVAL; |
| 315 | |
| 316 | memcpy(&stream->props, props, sizeof(*props)); |
| 317 | |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 318 | usb_clear_halt(stream->udev, usb_rcvbulkpipe(stream->udev, |
| 319 | stream->props.endpoint)); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 320 | |
| 321 | if (stream->complete == NULL) { |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 322 | pr_err("%s: there is no data callback - this doesn't make " \ |
| 323 | "sense", KBUILD_MODNAME); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 324 | return -EINVAL; |
| 325 | } |
| 326 | |
| 327 | switch (stream->props.type) { |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 328 | case USB_BULK: |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 329 | ret = usb_alloc_stream_buffers(stream, stream->props.count, |
| 330 | stream->props.u.bulk.buffersize); |
| 331 | if (ret < 0) |
| 332 | return ret; |
| 333 | |
| 334 | return usb_urb_alloc_bulk_urbs(stream); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 335 | case USB_ISOC: |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 336 | ret = usb_alloc_stream_buffers(stream, stream->props.count, |
| 337 | stream->props.u.isoc.framesize * |
| 338 | stream->props.u.isoc.framesperurb); |
| 339 | if (ret < 0) |
| 340 | return ret; |
| 341 | |
| 342 | return usb_urb_alloc_isoc_urbs(stream); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 343 | default: |
Antti Palosaari | 23d8e63 | 2012-06-06 22:46:38 -0300 | [diff] [blame^] | 344 | pr_err("%s: unknown URB-type for data transfer", |
| 345 | KBUILD_MODNAME); |
Antti Palosaari | 4e60d95 | 2012-05-24 14:44:21 -0300 | [diff] [blame] | 346 | return -EINVAL; |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 347 | } |
| 348 | } |
| 349 | |
| 350 | int usb_urb_exit(struct usb_data_stream *stream) |
| 351 | { |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 352 | usb_urb_free_urbs(stream); |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 353 | usb_free_stream_buffers(stream); |
Antti Palosaari | bce1c02 | 2012-05-28 17:25:40 -0300 | [diff] [blame] | 354 | |
Antti Palosaari | c79b339 | 2012-05-23 10:06:09 -0300 | [diff] [blame] | 355 | return 0; |
| 356 | } |