kernel/2.6.29.6-aldebaran-rt/drivers/media/video/gspca/finepix.c

   1 /*
   2  * Fujifilm Finepix subdriver
   3  *
   4  * Copyright (C) 2008 Frank Zago
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20
  21 #define MODULE_NAME "finepix"
  22
  23 #include "gspca.h"
  24
  25 MODULE_AUTHOR("Frank Zago <frank@zago.net>");
  26 MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
  27 MODULE_LICENSE("GPL");
  28
  29 /* Default timeout, in ms */
  30 #define FPIX_TIMEOUT (HZ / 10)
  31
  32 /* Maximum transfer size to use. The windows driver reads by chunks of
  33  * 0x2000 bytes, so do the same. Note: reading more seems to work
  34  * too. */
  35 #define FPIX_MAX_TRANSFER 0x2000
  36
  37 /* Structure to hold all of our device specific stuff */
  38 struct usb_fpix {
  39         struct gspca_dev gspca_dev;     /* !! must be the first item */
  40
  41         /*
  42          * USB stuff
  43          */
  44         struct usb_ctrlrequest ctrlreq;
  45         struct urb *control_urb;
  46         struct timer_list bulk_timer;
  47
  48         enum {
  49                 FPIX_NOP,       /* inactive, else streaming */
  50                 FPIX_RESET,     /* must reset */
  51                 FPIX_REQ_FRAME, /* requesting a frame */
  52                 FPIX_READ_FRAME,        /* reading frame */
  53         } state;
  54
  55         /*
  56          * Driver stuff
  57          */
  58         struct delayed_work wqe;
  59         struct completion can_close;
  60         int streaming;
  61 };
  62
  63 /* Delay after which claim the next frame. If the delay is too small,
  64  * the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
  65  * will fail every 4 or 5 frames, but 30ms is perfect. */
  66 #define NEXT_FRAME_DELAY  (((HZ * 30) + 999) / 1000)
  67
  68 #define dev_new_state(new_state) {                              \
  69                 PDEBUG(D_STREAM, "new state from %d to %d at %s:%d",    \
  70                         dev->state, new_state, __func__, __LINE__);     \
  71                 dev->state = new_state;                                 \
  72 }
  73
  74 /* These cameras only support 320x200. */
  75 static const struct v4l2_pix_format fpix_mode[1] = {
  76         { 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  77                 .bytesperline = 320,
  78                 .sizeimage = 320 * 240 * 3 / 8 + 590,
  79                 .colorspace = V4L2_COLORSPACE_SRGB,
  80                 .priv = 0}
  81 };
  82
  83 /* Reads part of a frame */
  84 static void read_frame_part(struct usb_fpix *dev)
  85 {
  86         int ret;
  87
  88         PDEBUG(D_STREAM, "read_frame_part");
  89
  90         /* Reads part of a frame */
  91         ret = usb_submit_urb(dev->gspca_dev.urb[0], GFP_ATOMIC);
  92         if (ret) {
  93                 dev_new_state(FPIX_RESET);
  94                 schedule_delayed_work(&dev->wqe, 1);
  95                 PDEBUG(D_STREAM, "usb_submit_urb failed with %d",
  96                         ret);
  97         } else {
  98                 /* Sometimes we never get a callback, so use a timer.
  99                  * Is this masking a bug somewhere else? */
 100                 dev->bulk_timer.expires = jiffies + msecs_to_jiffies(150);
 101                 add_timer(&dev->bulk_timer);
 102         }
 103 }
 104
 105 /* Callback for URBs. */
 106 static void urb_callback(struct urb *urb)
 107 {
 108         struct gspca_dev *gspca_dev = urb->context;
 109         struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
 110
 111         PDEBUG(D_PACK,
 112                 "enter urb_callback - status=%d, length=%d",
 113                 urb->status, urb->actual_length);
 114
 115         if (dev->state == FPIX_READ_FRAME)
 116                 del_timer(&dev->bulk_timer);
 117
 118         if (urb->status != 0) {
 119                 /* We kill a stuck urb every 50 frames on average, so don't
 120                  * display a log message for that. */
 121                 if (urb->status != -ECONNRESET)
 122                         PDEBUG(D_STREAM, "bad URB status %d", urb->status);
 123                 dev_new_state(FPIX_RESET);
 124                 schedule_delayed_work(&dev->wqe, 1);
 125         }
 126
 127         switch (dev->state) {
 128         case FPIX_REQ_FRAME:
 129                 dev_new_state(FPIX_READ_FRAME);
 130                 read_frame_part(dev);
 131                 break;
 132
 133         case FPIX_READ_FRAME: {
 134                 unsigned char *data = urb->transfer_buffer;
 135                 struct gspca_frame *frame;
 136
 137                 frame = gspca_get_i_frame(&dev->gspca_dev);
 138                 if (frame == NULL)
 139                         gspca_dev->last_packet_type = DISCARD_PACKET;
 140                 if (urb->actual_length < FPIX_MAX_TRANSFER ||
 141                         (data[urb->actual_length-2] == 0xff &&
 142                                 data[urb->actual_length-1] == 0xd9)) {
 143
 144                         /* If the result is less than what was asked
 145                          * for, then it's the end of the
 146                          * frame. Sometime the jpeg is not complete,
 147                          * but there's nothing we can do. We also end
 148                          * here if the the jpeg ends right at the end
 149                          * of the frame. */
 150                         if (frame)
 151                                 gspca_frame_add(gspca_dev, LAST_PACKET,
 152                                                 frame,
 153                                                 data, urb->actual_length);
 154                         dev_new_state(FPIX_REQ_FRAME);
 155                         schedule_delayed_work(&dev->wqe, NEXT_FRAME_DELAY);
 156                 } else {
 157
 158                         /* got a partial image */
 159                         if (frame)
 160                                 gspca_frame_add(gspca_dev,
 161                                                 gspca_dev->last_packet_type
 162                                                                 == LAST_PACKET
 163                                                 ? FIRST_PACKET : INTER_PACKET,
 164                                                 frame,
 165                                         data, urb->actual_length);
 166                         read_frame_part(dev);
 167                 }
 168                 break;
 169             }
 170
 171         case FPIX_NOP:
 172         case FPIX_RESET:
 173                 PDEBUG(D_STREAM, "invalid state %d", dev->state);
 174                 break;
 175         }
 176 }
 177
 178 /* Request a new frame */
 179 static void request_frame(struct usb_fpix *dev)
 180 {
 181         int ret;
 182         struct gspca_dev *gspca_dev = &dev->gspca_dev;
 183
 184         /* Setup command packet */
 185         memset(gspca_dev->usb_buf, 0, 12);
 186         gspca_dev->usb_buf[0] = 0xd3;
 187         gspca_dev->usb_buf[7] = 0x01;
 188
 189         /* Request a frame */
 190         dev->ctrlreq.bRequestType =
 191                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 192         dev->ctrlreq.bRequest = USB_REQ_GET_STATUS;
 193         dev->ctrlreq.wValue = 0;
 194         dev->ctrlreq.wIndex = 0;
 195         dev->ctrlreq.wLength = cpu_to_le16(12);
 196
 197         usb_fill_control_urb(dev->control_urb,
 198                              gspca_dev->dev,
 199                              usb_sndctrlpipe(gspca_dev->dev, 0),
 200                              (unsigned char *) &dev->ctrlreq,
 201                              gspca_dev->usb_buf,
 202                              12, urb_callback, gspca_dev);
 203
 204         ret = usb_submit_urb(dev->control_urb, GFP_ATOMIC);
 205         if (ret) {
 206                 dev_new_state(FPIX_RESET);
 207                 schedule_delayed_work(&dev->wqe, 1);
 208                 PDEBUG(D_STREAM, "usb_submit_urb failed with %d", ret);
 209         }
 210 }
 211
 212 /*--------------------------------------------------------------------------*/
 213
 214 /* State machine. */
 215 static void fpix_sm(struct work_struct *work)
 216 {
 217         struct usb_fpix *dev = container_of(work, struct usb_fpix, wqe.work);
 218
 219         PDEBUG(D_STREAM, "fpix_sm state %d", dev->state);
 220
 221         /* verify that the device wasn't unplugged */
 222         if (!dev->gspca_dev.present) {
 223                 PDEBUG(D_STREAM, "device is gone");
 224                 dev_new_state(FPIX_NOP);
 225                 complete(&dev->can_close);
 226                 return;
 227         }
 228
 229         if (!dev->streaming) {
 230                 PDEBUG(D_STREAM, "stopping state machine");
 231                 dev_new_state(FPIX_NOP);
 232                 complete(&dev->can_close);
 233                 return;
 234         }
 235
 236         switch (dev->state) {
 237         case FPIX_RESET:
 238                 dev_new_state(FPIX_REQ_FRAME);
 239                 schedule_delayed_work(&dev->wqe, HZ / 10);
 240                 break;
 241
 242         case FPIX_REQ_FRAME:
 243                 /* get an image */
 244                 request_frame(dev);
 245                 break;
 246
 247         case FPIX_NOP:
 248         case FPIX_READ_FRAME:
 249                 PDEBUG(D_STREAM, "invalid state %d", dev->state);
 250                 break;
 251         }
 252 }
 253
 254 /* this function is called at probe time */
 255 static int sd_config(struct gspca_dev *gspca_dev,
 256                 const struct usb_device_id *id)
 257 {
 258         struct cam *cam = &gspca_dev->cam;
 259
 260         cam->cam_mode = fpix_mode;
 261         cam->nmodes = 1;
 262         cam->epaddr = 0x01;     /* todo: correct for all cams? */
 263         cam->bulk_size = FPIX_MAX_TRANSFER;
 264
 265 /*      gspca_dev->nbalt = 1;    * use bulk transfer */
 266         return 0;
 267 }
 268
 269 /* Stop streaming and free the ressources allocated by sd_start. */
 270 static void sd_stopN(struct gspca_dev *gspca_dev)
 271 {
 272         struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
 273
 274         dev->streaming = 0;
 275
 276         /* Stop the state machine */
 277         if (dev->state != FPIX_NOP)
 278                 wait_for_completion(&dev->can_close);
 279 }
 280
 281 /* called on streamoff with alt 0 and disconnect */
 282 static void sd_stop0(struct gspca_dev *gspca_dev)
 283 {
 284         struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
 285
 286         usb_free_urb(dev->control_urb);
 287         dev->control_urb = NULL;
 288 }
 289
 290 /* Kill an URB that hasn't completed. */
 291 static void timeout_kill(unsigned long data)
 292 {
 293         struct urb *urb = (struct urb *) data;
 294
 295         usb_unlink_urb(urb);
 296 }
 297
 298 /* this function is called at probe and resume time */
 299 static int sd_init(struct gspca_dev *gspca_dev)
 300 {
 301         struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
 302
 303         INIT_DELAYED_WORK(&dev->wqe, fpix_sm);
 304
 305         init_timer(&dev->bulk_timer);
 306         dev->bulk_timer.function = timeout_kill;
 307
 308         return 0;
 309 }
 310
 311 static int sd_start(struct gspca_dev *gspca_dev)
 312 {
 313         struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
 314         int ret;
 315         int size_ret;
 316
 317         /* Init the device */
 318         memset(gspca_dev->usb_buf, 0, 12);
 319         gspca_dev->usb_buf[0] = 0xc6;
 320         gspca_dev->usb_buf[8] = 0x20;
 321
 322         ret = usb_control_msg(gspca_dev->dev,
 323                         usb_sndctrlpipe(gspca_dev->dev, 0),
 324                         USB_REQ_GET_STATUS,
 325                         USB_DIR_OUT | USB_TYPE_CLASS |
 326                         USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
 327                         12, FPIX_TIMEOUT);
 328
 329         if (ret != 12) {
 330                 PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
 331                 ret = -EIO;
 332                 goto error;
 333         }
 334
 335         /* Read the result of the command. Ignore the result, for it
 336          * varies with the device. */
 337         ret = usb_bulk_msg(gspca_dev->dev,
 338                         usb_rcvbulkpipe(gspca_dev->dev,
 339                                         gspca_dev->cam.epaddr),
 340                         gspca_dev->usb_buf, FPIX_MAX_TRANSFER, &size_ret,
 341                         FPIX_TIMEOUT);
 342         if (ret != 0) {
 343                 PDEBUG(D_STREAM, "usb_bulk_msg failed (%d)", ret);
 344                 ret = -EIO;
 345                 goto error;
 346         }
 347
 348         /* Request a frame, but don't read it */
 349         memset(gspca_dev->usb_buf, 0, 12);
 350         gspca_dev->usb_buf[0] = 0xd3;
 351         gspca_dev->usb_buf[7] = 0x01;
 352
 353         ret = usb_control_msg(gspca_dev->dev,
 354                         usb_sndctrlpipe(gspca_dev->dev, 0),
 355                         USB_REQ_GET_STATUS,
 356                         USB_DIR_OUT | USB_TYPE_CLASS |
 357                         USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
 358                         12, FPIX_TIMEOUT);
 359         if (ret != 12) {
 360                 PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
 361                 ret = -EIO;
 362                 goto error;
 363         }
 364
 365         /* Again, reset bulk in endpoint */
 366         usb_clear_halt(gspca_dev->dev, gspca_dev->cam.epaddr);
 367
 368         /* Allocate a control URB */
 369         dev->control_urb = usb_alloc_urb(0, GFP_KERNEL);
 370         if (!dev->control_urb) {
 371                 PDEBUG(D_STREAM, "No free urbs available");
 372                 ret = -EIO;
 373                 goto error;
 374         }
 375
 376         /* Various initializations. */
 377         init_completion(&dev->can_close);
 378         dev->bulk_timer.data = (unsigned long)dev->gspca_dev.urb[0];
 379         dev->gspca_dev.urb[0]->complete = urb_callback;
 380         dev->streaming = 1;
 381
 382         /* Schedule a frame request. */
 383         dev_new_state(FPIX_REQ_FRAME);
 384         schedule_delayed_work(&dev->wqe, 1);
 385
 386         return 0;
 387
 388 error:
 389         /* Free the ressources */
 390         sd_stopN(gspca_dev);
 391         sd_stop0(gspca_dev);
 392         return ret;
 393 }
 394
 395 /* Table of supported USB devices */
 396 static const __devinitdata struct usb_device_id device_table[] = {
 397         {USB_DEVICE(0x04cb, 0x0104)},
 398         {USB_DEVICE(0x04cb, 0x0109)},
 399         {USB_DEVICE(0x04cb, 0x010b)},
 400         {USB_DEVICE(0x04cb, 0x010f)},
 401         {USB_DEVICE(0x04cb, 0x0111)},
 402         {USB_DEVICE(0x04cb, 0x0113)},
 403         {USB_DEVICE(0x04cb, 0x0115)},
 404         {USB_DEVICE(0x04cb, 0x0117)},
 405         {USB_DEVICE(0x04cb, 0x0119)},
 406         {USB_DEVICE(0x04cb, 0x011b)},
 407         {USB_DEVICE(0x04cb, 0x011d)},
 408         {USB_DEVICE(0x04cb, 0x0121)},
 409         {USB_DEVICE(0x04cb, 0x0123)},
 410         {USB_DEVICE(0x04cb, 0x0125)},
 411         {USB_DEVICE(0x04cb, 0x0127)},
 412         {USB_DEVICE(0x04cb, 0x0129)},
 413         {USB_DEVICE(0x04cb, 0x012b)},
 414         {USB_DEVICE(0x04cb, 0x012d)},
 415         {USB_DEVICE(0x04cb, 0x012f)},
 416         {USB_DEVICE(0x04cb, 0x0131)},
 417         {USB_DEVICE(0x04cb, 0x013b)},
 418         {USB_DEVICE(0x04cb, 0x013d)},
 419         {USB_DEVICE(0x04cb, 0x013f)},
 420         {}
 421 };
 422
 423 MODULE_DEVICE_TABLE(usb, device_table);
 424
 425 /* sub-driver description */
 426 static const struct sd_desc sd_desc = {
 427         .name = MODULE_NAME,
 428         .config = sd_config,
 429         .init = sd_init,
 430         .start = sd_start,
 431         .stopN = sd_stopN,
 432         .stop0 = sd_stop0,
 433 };
 434
 435 /* -- device connect -- */
 436 static int sd_probe(struct usb_interface *intf,
 437                 const struct usb_device_id *id)
 438 {
 439         return gspca_dev_probe(intf, id,
 440                         &sd_desc,
 441                         sizeof(struct usb_fpix),
 442                         THIS_MODULE);
 443 }
 444
 445 static struct usb_driver sd_driver = {
 446         .name = MODULE_NAME,
 447         .id_table = device_table,
 448         .probe = sd_probe,
 449         .disconnect = gspca_disconnect,
 450 #ifdef CONFIG_PM
 451         .suspend = gspca_suspend,
 452         .resume = gspca_resume,
 453 #endif
 454 };
 455
 456 /* -- module insert / remove -- */
 457 static int __init sd_mod_init(void)
 458 {
 459         if (usb_register(&sd_driver) < 0)
 460                 return -1;
 461         PDEBUG(D_PROBE, "registered");
 462         return 0;
 463 }
 464 static void __exit sd_mod_exit(void)
 465 {
 466         usb_deregister(&sd_driver);
 467         PDEBUG(D_PROBE, "deregistered");
 468 }
 469
 470 module_init(sd_mod_init);
 471 module_exit(sd_mod_exit);