Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * |
| 3 | * Filename: cpia2_usb.c |
| 4 | * |
| 5 | * Copyright 2001, STMicrolectronics, Inc. |
| 6 | * Contact: steve.miller@st.com |
| 7 | * |
| 8 | * Description: |
| 9 | * This is a USB driver for CPia2 based video cameras. |
| 10 | * The infrastructure of this driver is based on the cpia usb driver by |
| 11 | * Jochen Scharrlach and Johannes Erdfeldt. |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | * |
| 27 | * Stripped of 2.4 stuff ready for main kernel submit by |
Alan Cox | d9b0144 | 2008-10-27 15:13:47 -0300 | [diff] [blame] | 28 | * Alan Cox <alan@lxorguk.ukuu.org.uk> |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 29 | ****************************************************************************/ |
| 30 | |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/usb.h> |
Paul Gortmaker | 7a707b8 | 2011-07-03 14:03:12 -0400 | [diff] [blame] | 34 | #include <linux/module.h> |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 35 | |
| 36 | #include "cpia2.h" |
| 37 | |
| 38 | static int frame_sizes[] = { |
| 39 | 0, // USBIF_CMDONLY |
| 40 | 0, // USBIF_BULK |
| 41 | 128, // USBIF_ISO_1 |
| 42 | 384, // USBIF_ISO_2 |
| 43 | 640, // USBIF_ISO_3 |
| 44 | 768, // USBIF_ISO_4 |
| 45 | 896, // USBIF_ISO_5 |
| 46 | 1023, // USBIF_ISO_6 |
| 47 | }; |
| 48 | |
| 49 | #define FRAMES_PER_DESC 10 |
| 50 | #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] |
| 51 | |
| 52 | static void process_frame(struct camera_data *cam); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 53 | static void cpia2_usb_complete(struct urb *urb); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 54 | static int cpia2_usb_probe(struct usb_interface *intf, |
| 55 | const struct usb_device_id *id); |
| 56 | static void cpia2_usb_disconnect(struct usb_interface *intf); |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 57 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message); |
| 58 | static int cpia2_usb_resume(struct usb_interface *intf); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 59 | |
| 60 | static void free_sbufs(struct camera_data *cam); |
| 61 | static void add_APPn(struct camera_data *cam); |
| 62 | static void add_COM(struct camera_data *cam); |
| 63 | static int submit_urbs(struct camera_data *cam); |
| 64 | static int set_alternate(struct camera_data *cam, unsigned int alt); |
| 65 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); |
| 66 | |
| 67 | static struct usb_device_id cpia2_id_table[] = { |
| 68 | {USB_DEVICE(0x0553, 0x0100)}, |
| 69 | {USB_DEVICE(0x0553, 0x0140)}, |
| 70 | {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ |
| 71 | {} /* Terminating entry */ |
| 72 | }; |
| 73 | MODULE_DEVICE_TABLE(usb, cpia2_id_table); |
| 74 | |
| 75 | static struct usb_driver cpia2_driver = { |
| 76 | .name = "cpia2", |
| 77 | .probe = cpia2_usb_probe, |
| 78 | .disconnect = cpia2_usb_disconnect, |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 79 | .suspend = cpia2_usb_suspend, |
| 80 | .resume = cpia2_usb_resume, |
| 81 | .reset_resume = cpia2_usb_resume, |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 82 | .id_table = cpia2_id_table |
| 83 | }; |
| 84 | |
| 85 | |
| 86 | /****************************************************************************** |
| 87 | * |
| 88 | * process_frame |
| 89 | * |
| 90 | *****************************************************************************/ |
| 91 | static void process_frame(struct camera_data *cam) |
| 92 | { |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 93 | static int frame_count; |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 94 | |
| 95 | unsigned char *inbuff = cam->workbuff->data; |
| 96 | |
| 97 | DBG("Processing frame #%d, current:%d\n", |
| 98 | cam->workbuff->num, cam->curbuff->num); |
| 99 | |
| 100 | if(cam->workbuff->length > cam->workbuff->max_length) |
| 101 | cam->workbuff->max_length = cam->workbuff->length; |
| 102 | |
| 103 | if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { |
| 104 | frame_count++; |
| 105 | } else { |
| 106 | cam->workbuff->status = FRAME_ERROR; |
| 107 | DBG("Start of frame not found\n"); |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | /*** |
| 112 | * Now the output buffer should have a JPEG image in it. |
| 113 | ***/ |
| 114 | if(!cam->first_image_seen) { |
| 115 | /* Always skip the first image after streaming |
| 116 | * starts. It is almost certainly corrupt. */ |
| 117 | cam->first_image_seen = 1; |
| 118 | cam->workbuff->status = FRAME_EMPTY; |
| 119 | return; |
| 120 | } |
| 121 | if (cam->workbuff->length > 3) { |
| 122 | if(cam->mmapped && |
| 123 | cam->workbuff->length < cam->workbuff->max_length) { |
| 124 | /* No junk in the buffers */ |
| 125 | memset(cam->workbuff->data+cam->workbuff->length, |
| 126 | 0, cam->workbuff->max_length- |
| 127 | cam->workbuff->length); |
| 128 | } |
| 129 | cam->workbuff->max_length = cam->workbuff->length; |
| 130 | cam->workbuff->status = FRAME_READY; |
| 131 | |
| 132 | if(!cam->mmapped && cam->num_frames > 2) { |
| 133 | /* During normal reading, the most recent |
| 134 | * frame will be read. If the current frame |
| 135 | * hasn't started reading yet, it will never |
| 136 | * be read, so mark it empty. If the buffer is |
| 137 | * mmapped, or we have few buffers, we need to |
| 138 | * wait for the user to free the buffer. |
| 139 | * |
| 140 | * NOTE: This is not entirely foolproof with 3 |
| 141 | * buffers, but it would take an EXTREMELY |
| 142 | * overloaded system to cause problems (possible |
| 143 | * image data corruption). Basically, it would |
| 144 | * need to take more time to execute cpia2_read |
| 145 | * than it would for the camera to send |
| 146 | * cam->num_frames-2 frames before problems |
| 147 | * could occur. |
| 148 | */ |
| 149 | cam->curbuff->status = FRAME_EMPTY; |
| 150 | } |
| 151 | cam->curbuff = cam->workbuff; |
| 152 | cam->workbuff = cam->workbuff->next; |
| 153 | DBG("Changed buffers, work:%d, current:%d\n", |
| 154 | cam->workbuff->num, cam->curbuff->num); |
| 155 | return; |
| 156 | } else { |
| 157 | DBG("Not enough data for an image.\n"); |
| 158 | } |
| 159 | |
| 160 | cam->workbuff->status = FRAME_ERROR; |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | /****************************************************************************** |
| 165 | * |
| 166 | * add_APPn |
| 167 | * |
| 168 | * Adds a user specified APPn record |
| 169 | *****************************************************************************/ |
| 170 | static void add_APPn(struct camera_data *cam) |
| 171 | { |
| 172 | if(cam->APP_len > 0) { |
| 173 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
| 174 | cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; |
| 175 | cam->workbuff->data[cam->workbuff->length++] = 0; |
| 176 | cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; |
| 177 | memcpy(cam->workbuff->data+cam->workbuff->length, |
| 178 | cam->APP_data, cam->APP_len); |
| 179 | cam->workbuff->length += cam->APP_len; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | /****************************************************************************** |
| 184 | * |
| 185 | * add_COM |
| 186 | * |
| 187 | * Adds a user specified COM record |
| 188 | *****************************************************************************/ |
| 189 | static void add_COM(struct camera_data *cam) |
| 190 | { |
| 191 | if(cam->COM_len > 0) { |
| 192 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
| 193 | cam->workbuff->data[cam->workbuff->length++] = 0xFE; |
| 194 | cam->workbuff->data[cam->workbuff->length++] = 0; |
| 195 | cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; |
| 196 | memcpy(cam->workbuff->data+cam->workbuff->length, |
| 197 | cam->COM_data, cam->COM_len); |
| 198 | cam->workbuff->length += cam->COM_len; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /****************************************************************************** |
| 203 | * |
| 204 | * cpia2_usb_complete |
| 205 | * |
| 206 | * callback when incoming packet is received |
| 207 | *****************************************************************************/ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 208 | static void cpia2_usb_complete(struct urb *urb) |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 209 | { |
| 210 | int i; |
| 211 | unsigned char *cdata; |
Peter Senna Tschudin | b5eee19 | 2013-09-21 19:27:38 -0300 | [diff] [blame] | 212 | static bool frame_ready = false; |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 213 | struct camera_data *cam = (struct camera_data *) urb->context; |
| 214 | |
| 215 | if (urb->status!=0) { |
| 216 | if (!(urb->status == -ENOENT || |
| 217 | urb->status == -ECONNRESET || |
| 218 | urb->status == -ESHUTDOWN)) |
| 219 | { |
| 220 | DBG("urb->status = %d!\n", urb->status); |
| 221 | } |
| 222 | DBG("Stopping streaming\n"); |
| 223 | return; |
| 224 | } |
| 225 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 226 | if (!cam->streaming || !video_is_registered(&cam->vdev)) { |
| 227 | LOG("Will now stop the streaming: streaming = %d, present=%d\n", |
| 228 | cam->streaming, video_is_registered(&cam->vdev)); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 229 | return; |
| 230 | } |
| 231 | |
| 232 | /*** |
| 233 | * Packet collater |
| 234 | ***/ |
| 235 | //DBG("Collating %d packets\n", urb->number_of_packets); |
| 236 | for (i = 0; i < urb->number_of_packets; i++) { |
| 237 | u16 checksum, iso_checksum; |
| 238 | int j; |
| 239 | int n = urb->iso_frame_desc[i].actual_length; |
| 240 | int st = urb->iso_frame_desc[i].status; |
| 241 | |
| 242 | if(cam->workbuff->status == FRAME_READY) { |
| 243 | struct framebuf *ptr; |
| 244 | /* Try to find an available buffer */ |
| 245 | DBG("workbuff full, searching\n"); |
| 246 | for (ptr = cam->workbuff->next; |
| 247 | ptr != cam->workbuff; |
| 248 | ptr = ptr->next) |
| 249 | { |
| 250 | if (ptr->status == FRAME_EMPTY) { |
| 251 | ptr->status = FRAME_READING; |
| 252 | ptr->length = 0; |
| 253 | break; |
| 254 | } |
| 255 | } |
| 256 | if (ptr == cam->workbuff) |
| 257 | break; /* No READING or EMPTY buffers left */ |
| 258 | |
| 259 | cam->workbuff = ptr; |
| 260 | } |
| 261 | |
| 262 | if (cam->workbuff->status == FRAME_EMPTY || |
| 263 | cam->workbuff->status == FRAME_ERROR) { |
| 264 | cam->workbuff->status = FRAME_READING; |
| 265 | cam->workbuff->length = 0; |
| 266 | } |
| 267 | |
| 268 | //DBG(" Packet %d length = %d, status = %d\n", i, n, st); |
| 269 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| 270 | |
| 271 | if (st) { |
| 272 | LOG("cpia2 data error: [%d] len=%d, status = %d\n", |
| 273 | i, n, st); |
| 274 | if(!ALLOW_CORRUPT) |
| 275 | cam->workbuff->status = FRAME_ERROR; |
| 276 | continue; |
| 277 | } |
| 278 | |
| 279 | if(n<=2) |
| 280 | continue; |
| 281 | |
| 282 | checksum = 0; |
| 283 | for(j=0; j<n-2; ++j) |
| 284 | checksum += cdata[j]; |
| 285 | iso_checksum = cdata[j] + cdata[j+1]*256; |
| 286 | if(checksum != iso_checksum) { |
| 287 | LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", |
| 288 | i, n, (int)checksum, (int)iso_checksum); |
| 289 | if(!ALLOW_CORRUPT) { |
| 290 | cam->workbuff->status = FRAME_ERROR; |
| 291 | continue; |
| 292 | } |
| 293 | } |
| 294 | n -= 2; |
| 295 | |
| 296 | if(cam->workbuff->status != FRAME_READING) { |
| 297 | if((0xFF == cdata[0] && 0xD8 == cdata[1]) || |
| 298 | (0xD8 == cdata[0] && 0xFF == cdata[1] && |
| 299 | 0 != cdata[2])) { |
| 300 | /* frame is skipped, but increment total |
| 301 | * frame count anyway */ |
| 302 | cam->frame_count++; |
| 303 | } |
| 304 | DBG("workbuff not reading, status=%d\n", |
| 305 | cam->workbuff->status); |
| 306 | continue; |
| 307 | } |
| 308 | |
| 309 | if (cam->frame_size < cam->workbuff->length + n) { |
| 310 | ERR("buffer overflow! length: %d, n: %d\n", |
| 311 | cam->workbuff->length, n); |
| 312 | cam->workbuff->status = FRAME_ERROR; |
| 313 | if(cam->workbuff->length > cam->workbuff->max_length) |
| 314 | cam->workbuff->max_length = |
| 315 | cam->workbuff->length; |
| 316 | continue; |
| 317 | } |
| 318 | |
| 319 | if (cam->workbuff->length == 0) { |
| 320 | int data_offset; |
| 321 | if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { |
| 322 | data_offset = 1; |
| 323 | } else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) |
| 324 | && (0xFF == cdata[2])) { |
| 325 | data_offset = 2; |
| 326 | } else { |
| 327 | DBG("Ignoring packet, not beginning!\n"); |
| 328 | continue; |
| 329 | } |
| 330 | DBG("Start of frame pattern found\n"); |
Sakari Ailus | 8e6057b | 2012-09-15 15:14:42 -0300 | [diff] [blame] | 331 | v4l2_get_timestamp(&cam->workbuff->timestamp); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 332 | cam->workbuff->seq = cam->frame_count++; |
| 333 | cam->workbuff->data[0] = 0xFF; |
| 334 | cam->workbuff->data[1] = 0xD8; |
| 335 | cam->workbuff->length = 2; |
| 336 | add_APPn(cam); |
| 337 | add_COM(cam); |
| 338 | memcpy(cam->workbuff->data+cam->workbuff->length, |
| 339 | cdata+data_offset, n-data_offset); |
| 340 | cam->workbuff->length += n-data_offset; |
| 341 | } else if (cam->workbuff->length > 0) { |
| 342 | memcpy(cam->workbuff->data + cam->workbuff->length, |
| 343 | cdata, n); |
| 344 | cam->workbuff->length += n; |
| 345 | } |
| 346 | |
| 347 | if ((cam->workbuff->length >= 3) && |
| 348 | (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && |
| 349 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && |
| 350 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { |
| 351 | frame_ready = true; |
| 352 | cam->workbuff->data[cam->workbuff->length - 1] = 0; |
| 353 | cam->workbuff->length -= 1; |
| 354 | } else if ((cam->workbuff->length >= 2) && |
| 355 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && |
| 356 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { |
| 357 | frame_ready = true; |
| 358 | } |
| 359 | |
| 360 | if (frame_ready) { |
| 361 | DBG("Workbuff image size = %d\n",cam->workbuff->length); |
| 362 | process_frame(cam); |
| 363 | |
| 364 | frame_ready = false; |
| 365 | |
| 366 | if (waitqueue_active(&cam->wq_stream)) |
| 367 | wake_up_interruptible(&cam->wq_stream); |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | if(cam->streaming) { |
| 372 | /* resubmit */ |
| 373 | urb->dev = cam->dev; |
| 374 | if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) |
| 375 | ERR("%s: usb_submit_urb ret %d!\n", __func__, i); |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /****************************************************************************** |
| 380 | * |
| 381 | * configure_transfer_mode |
| 382 | * |
| 383 | *****************************************************************************/ |
| 384 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) |
| 385 | { |
| 386 | static unsigned char iso_regs[8][4] = { |
| 387 | {0x00, 0x00, 0x00, 0x00}, |
| 388 | {0x00, 0x00, 0x00, 0x00}, |
| 389 | {0xB9, 0x00, 0x00, 0x7E}, |
| 390 | {0xB9, 0x00, 0x01, 0x7E}, |
| 391 | {0xB9, 0x00, 0x02, 0x7E}, |
| 392 | {0xB9, 0x00, 0x02, 0xFE}, |
| 393 | {0xB9, 0x00, 0x03, 0x7E}, |
| 394 | {0xB9, 0x00, 0x03, 0xFD} |
| 395 | }; |
| 396 | struct cpia2_command cmd; |
| 397 | unsigned char reg; |
| 398 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 399 | if (!video_is_registered(&cam->vdev)) |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 400 | return -ENODEV; |
| 401 | |
| 402 | /*** |
| 403 | * Write the isoc registers according to the alternate selected |
| 404 | ***/ |
| 405 | cmd.direction = TRANSFER_WRITE; |
| 406 | cmd.buffer.block_data[0] = iso_regs[alt][0]; |
| 407 | cmd.buffer.block_data[1] = iso_regs[alt][1]; |
| 408 | cmd.buffer.block_data[2] = iso_regs[alt][2]; |
| 409 | cmd.buffer.block_data[3] = iso_regs[alt][3]; |
| 410 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| 411 | cmd.start = CPIA2_VC_USB_ISOLIM; |
| 412 | cmd.reg_count = 4; |
| 413 | cpia2_send_command(cam, &cmd); |
| 414 | |
| 415 | /*** |
| 416 | * Enable relevant streams before starting polling. |
| 417 | * First read USB Stream Config Register. |
| 418 | ***/ |
| 419 | cmd.direction = TRANSFER_READ; |
| 420 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| 421 | cmd.start = CPIA2_VC_USB_STRM; |
| 422 | cmd.reg_count = 1; |
| 423 | cpia2_send_command(cam, &cmd); |
| 424 | reg = cmd.buffer.block_data[0]; |
| 425 | |
| 426 | /* Clear iso, bulk, and int */ |
| 427 | reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | |
| 428 | CPIA2_VC_USB_STRM_ISO_ENABLE | |
| 429 | CPIA2_VC_USB_STRM_INT_ENABLE); |
| 430 | |
| 431 | if (alt == USBIF_BULK) { |
| 432 | DBG("Enabling bulk xfer\n"); |
| 433 | reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ |
| 434 | cam->xfer_mode = XFER_BULK; |
| 435 | } else if (alt >= USBIF_ISO_1) { |
| 436 | DBG("Enabling ISOC xfer\n"); |
| 437 | reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; |
| 438 | cam->xfer_mode = XFER_ISOC; |
| 439 | } |
| 440 | |
| 441 | cmd.buffer.block_data[0] = reg; |
| 442 | cmd.direction = TRANSFER_WRITE; |
| 443 | cmd.start = CPIA2_VC_USB_STRM; |
| 444 | cmd.reg_count = 1; |
| 445 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| 446 | cpia2_send_command(cam, &cmd); |
| 447 | |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | /****************************************************************************** |
| 452 | * |
| 453 | * cpia2_usb_change_streaming_alternate |
| 454 | * |
| 455 | *****************************************************************************/ |
| 456 | int cpia2_usb_change_streaming_alternate(struct camera_data *cam, |
| 457 | unsigned int alt) |
| 458 | { |
| 459 | int ret = 0; |
| 460 | |
| 461 | if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) |
| 462 | return -EINVAL; |
| 463 | |
| 464 | if(alt == cam->params.camera_state.stream_mode) |
| 465 | return 0; |
| 466 | |
| 467 | cpia2_usb_stream_pause(cam); |
| 468 | |
| 469 | configure_transfer_mode(cam, alt); |
| 470 | |
| 471 | cam->params.camera_state.stream_mode = alt; |
| 472 | |
| 473 | /* Reset the camera to prevent image quality degradation */ |
| 474 | cpia2_reset_camera(cam); |
| 475 | |
| 476 | cpia2_usb_stream_resume(cam); |
| 477 | |
| 478 | return ret; |
| 479 | } |
| 480 | |
| 481 | /****************************************************************************** |
| 482 | * |
| 483 | * set_alternate |
| 484 | * |
| 485 | *****************************************************************************/ |
Hans Verkuil | d45b9b8 | 2008-09-04 03:33:43 -0300 | [diff] [blame] | 486 | static int set_alternate(struct camera_data *cam, unsigned int alt) |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 487 | { |
| 488 | int ret = 0; |
| 489 | |
| 490 | if(alt == cam->cur_alt) |
| 491 | return 0; |
| 492 | |
| 493 | if (cam->cur_alt != USBIF_CMDONLY) { |
| 494 | DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); |
| 495 | ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); |
| 496 | if (ret != 0) |
| 497 | return ret; |
| 498 | } |
| 499 | if (alt != USBIF_CMDONLY) { |
| 500 | DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); |
| 501 | ret = usb_set_interface(cam->dev, cam->iface, alt); |
| 502 | if (ret != 0) |
| 503 | return ret; |
| 504 | } |
| 505 | |
| 506 | cam->old_alt = cam->cur_alt; |
| 507 | cam->cur_alt = alt; |
| 508 | |
| 509 | return ret; |
| 510 | } |
| 511 | |
| 512 | /****************************************************************************** |
| 513 | * |
| 514 | * free_sbufs |
| 515 | * |
| 516 | * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL |
| 517 | * are assumed to be allocated. Non-NULL .urb members are also assumed to be |
| 518 | * submitted (and must therefore be killed before they are freed). |
| 519 | *****************************************************************************/ |
| 520 | static void free_sbufs(struct camera_data *cam) |
| 521 | { |
| 522 | int i; |
| 523 | |
| 524 | for (i = 0; i < NUM_SBUF; i++) { |
| 525 | if(cam->sbuf[i].urb) { |
| 526 | usb_kill_urb(cam->sbuf[i].urb); |
| 527 | usb_free_urb(cam->sbuf[i].urb); |
| 528 | cam->sbuf[i].urb = NULL; |
| 529 | } |
| 530 | if(cam->sbuf[i].data) { |
| 531 | kfree(cam->sbuf[i].data); |
| 532 | cam->sbuf[i].data = NULL; |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | /******* |
| 538 | * Convenience functions |
| 539 | *******/ |
| 540 | /**************************************************************************** |
| 541 | * |
| 542 | * write_packet |
| 543 | * |
| 544 | ***************************************************************************/ |
| 545 | static int write_packet(struct usb_device *udev, |
| 546 | u8 request, u8 * registers, u16 start, size_t size) |
| 547 | { |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 548 | unsigned char *buf; |
| 549 | int ret; |
| 550 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 551 | if (!registers || size <= 0) |
| 552 | return -EINVAL; |
| 553 | |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 554 | buf = kmalloc(size, GFP_KERNEL); |
| 555 | if (!buf) |
| 556 | return -ENOMEM; |
| 557 | |
| 558 | memcpy(buf, registers, size); |
| 559 | |
| 560 | ret = usb_control_msg(udev, |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 561 | usb_sndctrlpipe(udev, 0), |
| 562 | request, |
| 563 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 564 | start, /* value */ |
| 565 | 0, /* index */ |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 566 | buf, /* buffer */ |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 567 | size, |
| 568 | HZ); |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 569 | |
| 570 | kfree(buf); |
| 571 | return ret; |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | /**************************************************************************** |
| 575 | * |
| 576 | * read_packet |
| 577 | * |
| 578 | ***************************************************************************/ |
| 579 | static int read_packet(struct usb_device *udev, |
| 580 | u8 request, u8 * registers, u16 start, size_t size) |
| 581 | { |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 582 | unsigned char *buf; |
| 583 | int ret; |
| 584 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 585 | if (!registers || size <= 0) |
| 586 | return -EINVAL; |
| 587 | |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 588 | buf = kmalloc(size, GFP_KERNEL); |
| 589 | if (!buf) |
| 590 | return -ENOMEM; |
| 591 | |
| 592 | ret = usb_control_msg(udev, |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 593 | usb_rcvctrlpipe(udev, 0), |
| 594 | request, |
| 595 | USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE, |
| 596 | start, /* value */ |
| 597 | 0, /* index */ |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 598 | buf, /* buffer */ |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 599 | size, |
| 600 | HZ); |
Mauro Carvalho Chehab | 45ae4a5 | 2016-10-10 08:28:26 -0300 | [diff] [blame] | 601 | |
| 602 | if (ret >= 0) |
| 603 | memcpy(registers, buf, size); |
| 604 | |
| 605 | kfree(buf); |
| 606 | |
| 607 | return ret; |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | /****************************************************************************** |
| 611 | * |
| 612 | * cpia2_usb_transfer_cmd |
| 613 | * |
| 614 | *****************************************************************************/ |
| 615 | int cpia2_usb_transfer_cmd(struct camera_data *cam, |
| 616 | void *registers, |
| 617 | u8 request, u8 start, u8 count, u8 direction) |
| 618 | { |
| 619 | int err = 0; |
| 620 | struct usb_device *udev = cam->dev; |
| 621 | |
| 622 | if (!udev) { |
| 623 | ERR("%s: Internal driver error: udev is NULL\n", __func__); |
| 624 | return -EINVAL; |
| 625 | } |
| 626 | |
| 627 | if (!registers) { |
| 628 | ERR("%s: Internal driver error: register array is NULL\n", __func__); |
| 629 | return -EINVAL; |
| 630 | } |
| 631 | |
| 632 | if (direction == TRANSFER_READ) { |
| 633 | err = read_packet(udev, request, (u8 *)registers, start, count); |
| 634 | if (err > 0) |
| 635 | err = 0; |
| 636 | } else if (direction == TRANSFER_WRITE) { |
| 637 | err =write_packet(udev, request, (u8 *)registers, start, count); |
| 638 | if (err < 0) { |
| 639 | LOG("Control message failed, err val = %d\n", err); |
| 640 | LOG("Message: request = 0x%0X, start = 0x%0X\n", |
| 641 | request, start); |
| 642 | LOG("Message: count = %d, register[0] = 0x%0X\n", |
| 643 | count, ((unsigned char *) registers)[0]); |
| 644 | } else |
| 645 | err=0; |
| 646 | } else { |
| 647 | LOG("Unexpected first byte of direction: %d\n", |
| 648 | direction); |
| 649 | return -EINVAL; |
| 650 | } |
| 651 | |
| 652 | if(err != 0) |
| 653 | LOG("Unexpected error: %d\n", err); |
| 654 | return err; |
| 655 | } |
| 656 | |
| 657 | |
| 658 | /****************************************************************************** |
| 659 | * |
| 660 | * submit_urbs |
| 661 | * |
| 662 | *****************************************************************************/ |
| 663 | static int submit_urbs(struct camera_data *cam) |
| 664 | { |
| 665 | struct urb *urb; |
Douglas Schilling Landgraf | beeb82b | 2008-09-04 11:21:03 -0300 | [diff] [blame] | 666 | int fx, err, i, j; |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 667 | |
| 668 | for(i=0; i<NUM_SBUF; ++i) { |
| 669 | if (cam->sbuf[i].data) |
| 670 | continue; |
| 671 | cam->sbuf[i].data = |
| 672 | kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); |
| 673 | if (!cam->sbuf[i].data) { |
Amit Choudhary | d82d418 | 2006-12-20 09:30:45 -0300 | [diff] [blame] | 674 | while (--i >= 0) { |
| 675 | kfree(cam->sbuf[i].data); |
| 676 | cam->sbuf[i].data = NULL; |
| 677 | } |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 678 | return -ENOMEM; |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /* We double buffer the Isoc lists, and also know the polling |
| 683 | * interval is every frame (1 == (1 << (bInterval -1))). |
| 684 | */ |
| 685 | for(i=0; i<NUM_SBUF; ++i) { |
| 686 | if(cam->sbuf[i].urb) { |
| 687 | continue; |
| 688 | } |
| 689 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); |
| 690 | if (!urb) { |
Douglas Schilling Landgraf | beeb82b | 2008-09-04 11:21:03 -0300 | [diff] [blame] | 691 | for (j = 0; j < i; j++) |
| 692 | usb_free_urb(cam->sbuf[j].urb); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 693 | return -ENOMEM; |
| 694 | } |
| 695 | |
| 696 | cam->sbuf[i].urb = urb; |
| 697 | urb->dev = cam->dev; |
| 698 | urb->context = cam; |
| 699 | urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/); |
| 700 | urb->transfer_flags = URB_ISO_ASAP; |
| 701 | urb->transfer_buffer = cam->sbuf[i].data; |
| 702 | urb->complete = cpia2_usb_complete; |
| 703 | urb->number_of_packets = FRAMES_PER_DESC; |
| 704 | urb->interval = 1; |
| 705 | urb->transfer_buffer_length = |
| 706 | FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; |
| 707 | |
| 708 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { |
| 709 | urb->iso_frame_desc[fx].offset = |
| 710 | FRAME_SIZE_PER_DESC * fx; |
| 711 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | |
| 716 | /* Queue the ISO urbs, and resubmit in the completion handler */ |
| 717 | for(i=0; i<NUM_SBUF; ++i) { |
| 718 | err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL); |
| 719 | if (err) { |
| 720 | ERR("usb_submit_urb[%d]() = %d\n", i, err); |
| 721 | return err; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | /****************************************************************************** |
| 729 | * |
| 730 | * cpia2_usb_stream_start |
| 731 | * |
| 732 | *****************************************************************************/ |
| 733 | int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate) |
| 734 | { |
| 735 | int ret; |
| 736 | int old_alt; |
| 737 | |
| 738 | if(cam->streaming) |
| 739 | return 0; |
| 740 | |
| 741 | if (cam->flush) { |
| 742 | int i; |
| 743 | DBG("Flushing buffers\n"); |
| 744 | for(i=0; i<cam->num_frames; ++i) { |
| 745 | cam->buffers[i].status = FRAME_EMPTY; |
| 746 | cam->buffers[i].length = 0; |
| 747 | } |
| 748 | cam->curbuff = &cam->buffers[0]; |
| 749 | cam->workbuff = cam->curbuff->next; |
| 750 | cam->flush = false; |
| 751 | } |
| 752 | |
| 753 | old_alt = cam->params.camera_state.stream_mode; |
| 754 | cam->params.camera_state.stream_mode = 0; |
| 755 | ret = cpia2_usb_change_streaming_alternate(cam, alternate); |
| 756 | if (ret < 0) { |
| 757 | int ret2; |
| 758 | ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret); |
| 759 | cam->params.camera_state.stream_mode = old_alt; |
| 760 | ret2 = set_alternate(cam, USBIF_CMDONLY); |
| 761 | if (ret2 < 0) { |
| 762 | ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already " |
| 763 | "failed. Then tried to call " |
| 764 | "set_alternate(USBIF_CMDONLY) = %d.\n", |
| 765 | alternate, ret, ret2); |
| 766 | } |
| 767 | } else { |
| 768 | cam->frame_count = 0; |
| 769 | cam->streaming = 1; |
| 770 | ret = cpia2_usb_stream_resume(cam); |
| 771 | } |
| 772 | return ret; |
| 773 | } |
| 774 | |
| 775 | /****************************************************************************** |
| 776 | * |
| 777 | * cpia2_usb_stream_pause |
| 778 | * |
| 779 | *****************************************************************************/ |
| 780 | int cpia2_usb_stream_pause(struct camera_data *cam) |
| 781 | { |
| 782 | int ret = 0; |
| 783 | if(cam->streaming) { |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 784 | free_sbufs(cam); |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 785 | ret = set_alternate(cam, USBIF_CMDONLY); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 786 | } |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | /****************************************************************************** |
| 791 | * |
| 792 | * cpia2_usb_stream_resume |
| 793 | * |
| 794 | *****************************************************************************/ |
| 795 | int cpia2_usb_stream_resume(struct camera_data *cam) |
| 796 | { |
| 797 | int ret = 0; |
| 798 | if(cam->streaming) { |
| 799 | cam->first_image_seen = 0; |
| 800 | ret = set_alternate(cam, cam->params.camera_state.stream_mode); |
| 801 | if(ret == 0) { |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 802 | /* for some reason the user effects need to be set |
| 803 | again when starting streaming. */ |
| 804 | cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE, |
| 805 | cam->params.vp_params.user_effects); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 806 | ret = submit_urbs(cam); |
| 807 | } |
| 808 | } |
| 809 | return ret; |
| 810 | } |
| 811 | |
| 812 | /****************************************************************************** |
| 813 | * |
| 814 | * cpia2_usb_stream_stop |
| 815 | * |
| 816 | *****************************************************************************/ |
| 817 | int cpia2_usb_stream_stop(struct camera_data *cam) |
| 818 | { |
| 819 | int ret; |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 820 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 821 | ret = cpia2_usb_stream_pause(cam); |
| 822 | cam->streaming = 0; |
| 823 | configure_transfer_mode(cam, 0); |
| 824 | return ret; |
| 825 | } |
| 826 | |
| 827 | /****************************************************************************** |
| 828 | * |
| 829 | * cpia2_usb_probe |
| 830 | * |
| 831 | * Probe and initialize. |
| 832 | *****************************************************************************/ |
| 833 | static int cpia2_usb_probe(struct usb_interface *intf, |
| 834 | const struct usb_device_id *id) |
| 835 | { |
| 836 | struct usb_device *udev = interface_to_usbdev(intf); |
| 837 | struct usb_interface_descriptor *interface; |
| 838 | struct camera_data *cam; |
| 839 | int ret; |
| 840 | |
| 841 | /* A multi-config CPiA2 camera? */ |
| 842 | if (udev->descriptor.bNumConfigurations != 1) |
| 843 | return -ENODEV; |
| 844 | interface = &intf->cur_altsetting->desc; |
| 845 | |
| 846 | /* If we get to this point, we found a CPiA2 camera */ |
| 847 | LOG("CPiA2 USB camera found\n"); |
| 848 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 849 | cam = cpia2_init_camera_struct(intf); |
| 850 | if (cam == NULL) |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 851 | return -ENOMEM; |
| 852 | |
| 853 | cam->dev = udev; |
| 854 | cam->iface = interface->bInterfaceNumber; |
| 855 | |
| 856 | ret = set_alternate(cam, USBIF_CMDONLY); |
| 857 | if (ret < 0) { |
| 858 | ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret); |
| 859 | kfree(cam); |
| 860 | return ret; |
| 861 | } |
| 862 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 863 | |
| 864 | if((ret = cpia2_init_camera(cam)) < 0) { |
| 865 | ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 866 | kfree(cam); |
| 867 | return ret; |
| 868 | } |
| 869 | LOG(" CPiA Version: %d.%02d (%d.%d)\n", |
| 870 | cam->params.version.firmware_revision_hi, |
| 871 | cam->params.version.firmware_revision_lo, |
| 872 | cam->params.version.asic_id, |
| 873 | cam->params.version.asic_rev); |
| 874 | LOG(" CPiA PnP-ID: %04x:%04x:%04x\n", |
| 875 | cam->params.pnp_id.vendor, |
| 876 | cam->params.pnp_id.product, |
| 877 | cam->params.pnp_id.device_revision); |
| 878 | LOG(" SensorID: %d.(version %d)\n", |
| 879 | cam->params.version.sensor_flags, |
| 880 | cam->params.version.sensor_rev); |
| 881 | |
| 882 | usb_set_intfdata(intf, cam); |
| 883 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 884 | ret = cpia2_register_camera(cam); |
| 885 | if (ret < 0) { |
| 886 | ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret); |
| 887 | kfree(cam); |
| 888 | return ret; |
| 889 | } |
| 890 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | /****************************************************************************** |
| 895 | * |
| 896 | * cpia2_disconnect |
| 897 | * |
| 898 | *****************************************************************************/ |
| 899 | static void cpia2_usb_disconnect(struct usb_interface *intf) |
| 900 | { |
| 901 | struct camera_data *cam = usb_get_intfdata(intf); |
| 902 | usb_set_intfdata(intf, NULL); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 903 | |
| 904 | DBG("Stopping stream\n"); |
| 905 | cpia2_usb_stream_stop(cam); |
| 906 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 907 | mutex_lock(&cam->v4l2_lock); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 908 | DBG("Unregistering camera\n"); |
| 909 | cpia2_unregister_camera(cam); |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 910 | v4l2_device_disconnect(&cam->v4l2_dev); |
| 911 | mutex_unlock(&cam->v4l2_lock); |
| 912 | v4l2_device_put(&cam->v4l2_dev); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 913 | |
| 914 | if(cam->buffers) { |
| 915 | DBG("Wakeup waiting processes\n"); |
| 916 | cam->curbuff->status = FRAME_READY; |
| 917 | cam->curbuff->length = 0; |
Kosuke Tatsukawa | 5063452 | 2015-10-08 21:35:40 -0300 | [diff] [blame] | 918 | wake_up_interruptible(&cam->wq_stream); |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | DBG("Releasing interface\n"); |
| 922 | usb_driver_release_interface(&cpia2_driver, intf); |
| 923 | |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 924 | LOG("CPiA2 camera disconnected.\n"); |
| 925 | } |
| 926 | |
Hans Verkuil | 6c493f8 | 2012-04-29 08:44:44 -0300 | [diff] [blame] | 927 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message) |
| 928 | { |
| 929 | struct camera_data *cam = usb_get_intfdata(intf); |
| 930 | |
| 931 | mutex_lock(&cam->v4l2_lock); |
| 932 | if (cam->streaming) { |
| 933 | cpia2_usb_stream_stop(cam); |
| 934 | cam->streaming = 1; |
| 935 | } |
| 936 | mutex_unlock(&cam->v4l2_lock); |
| 937 | |
| 938 | dev_info(&intf->dev, "going into suspend..\n"); |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | /* Resume device - start device. */ |
| 943 | static int cpia2_usb_resume(struct usb_interface *intf) |
| 944 | { |
| 945 | struct camera_data *cam = usb_get_intfdata(intf); |
| 946 | |
| 947 | mutex_lock(&cam->v4l2_lock); |
| 948 | v4l2_ctrl_handler_setup(&cam->hdl); |
| 949 | if (cam->streaming) { |
| 950 | cam->streaming = 0; |
| 951 | cpia2_usb_stream_start(cam, |
| 952 | cam->params.camera_state.stream_mode); |
| 953 | } |
| 954 | mutex_unlock(&cam->v4l2_lock); |
| 955 | |
| 956 | dev_info(&intf->dev, "coming out of suspend..\n"); |
| 957 | return 0; |
| 958 | } |
Alan Cox | ab33d50 | 2006-02-27 00:09:05 -0300 | [diff] [blame] | 959 | |
| 960 | /****************************************************************************** |
| 961 | * |
| 962 | * usb_cpia2_init |
| 963 | * |
| 964 | *****************************************************************************/ |
| 965 | int cpia2_usb_init(void) |
| 966 | { |
| 967 | return usb_register(&cpia2_driver); |
| 968 | } |
| 969 | |
| 970 | /****************************************************************************** |
| 971 | * |
| 972 | * usb_cpia_cleanup |
| 973 | * |
| 974 | *****************************************************************************/ |
| 975 | void cpia2_usb_cleanup(void) |
| 976 | { |
| 977 | schedule_timeout(2 * HZ); |
| 978 | usb_deregister(&cpia2_driver); |
| 979 | } |