drivers/media/usb/stkwebcam/stk-webcam.c

   1 /*
   2  * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
   3  *
   4  * Copyright (C) 2006 Nicolas VIVIEN
   5  * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
   6  *
   7  * Some parts are inspired from cafe_ccic.c
   8  * Copyright 2006-2007 Jonathan Corbet
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/kernel.h>
  28 #include <linux/errno.h>
  29 #include <linux/slab.h>
  30
  31 #include <linux/usb.h>
  32 #include <linux/mm.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/videodev2.h>
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-ioctl.h>
  37
  38 #include "stk-webcam.h"
  39
  40
  41 static bool hflip;
  42 module_param(hflip, bool, 0444);
  43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
  44
  45 static bool vflip;
  46 module_param(vflip, bool, 0444);
  47 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
  48
  49 static int debug;
  50 module_param(debug, int, 0444);
  51 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
  55 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
  56
  57 /* Some cameras have audio interfaces, we aren't interested in those */
  58 static struct usb_device_id stkwebcam_table[] = {
  59         { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
  60         { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
  61         { }
  62 };
  63 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
  64
  65 /*
  66  * Basic stuff
  67  */
  68 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
  69 {
  70         struct usb_device *udev = dev->udev;
  71         int ret;
  72
  73         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  74                         0x01,
  75                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  76                         value,
  77                         index,
  78                         NULL,
  79                         0,
  80                         500);
  81         if (ret < 0)
  82                 return ret;
  83         else
  84                 return 0;
  85 }
  86
  87 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
  88 {
  89         struct usb_device *udev = dev->udev;
  90         int ret;
  91
  92         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  93                         0x00,
  94                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  95                         0x00,
  96                         index,
  97                         (u8 *) value,
  98                         sizeof(u8),
  99                         500);
 100         if (ret < 0)
 101                 return ret;
 102         else
 103                 return 0;
 104 }
 105
 106 static int stk_start_stream(struct stk_camera *dev)
 107 {
 108         int value;
 109         int i, ret;
 110         int value_116, value_117;
 111
 112         if (!is_present(dev))
 113                 return -ENODEV;
 114         if (!is_memallocd(dev) || !is_initialised(dev)) {
 115                 STK_ERROR("FIXME: Buffers are not allocated\n");
 116                 return -EFAULT;
 117         }
 118         ret = usb_set_interface(dev->udev, 0, 5);
 119
 120         if (ret < 0)
 121                 STK_ERROR("usb_set_interface failed !\n");
 122         if (stk_sensor_wakeup(dev))
 123                 STK_ERROR("error awaking the sensor\n");
 124
 125         stk_camera_read_reg(dev, 0x0116, &value_116);
 126         stk_camera_read_reg(dev, 0x0117, &value_117);
 127
 128         stk_camera_write_reg(dev, 0x0116, 0x0000);
 129         stk_camera_write_reg(dev, 0x0117, 0x0000);
 130
 131         stk_camera_read_reg(dev, 0x0100, &value);
 132         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 133
 134         stk_camera_write_reg(dev, 0x0116, value_116);
 135         stk_camera_write_reg(dev, 0x0117, value_117);
 136         for (i = 0; i < MAX_ISO_BUFS; i++) {
 137                 if (dev->isobufs[i].urb) {
 138                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 139                         atomic_inc(&dev->urbs_used);
 140                         if (ret)
 141                                 return ret;
 142                 }
 143         }
 144         set_streaming(dev);
 145         return 0;
 146 }
 147
 148 static int stk_stop_stream(struct stk_camera *dev)
 149 {
 150         int value;
 151         int i;
 152         if (is_present(dev)) {
 153                 stk_camera_read_reg(dev, 0x0100, &value);
 154                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 155                 if (dev->isobufs != NULL) {
 156                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 157                                 if (dev->isobufs[i].urb)
 158                                         usb_kill_urb(dev->isobufs[i].urb);
 159                         }
 160                 }
 161                 unset_streaming(dev);
 162
 163                 if (usb_set_interface(dev->udev, 0, 0))
 164                         STK_ERROR("usb_set_interface failed !\n");
 165                 if (stk_sensor_sleep(dev))
 166                         STK_ERROR("error suspending the sensor\n");
 167         }
 168         return 0;
 169 }
 170
 171 /*
 172  * This seems to be the shortest init sequence we
 173  * must do in order to find the sensor
 174  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 175  * is also reset. Maybe powers down it?
 176  * Rest of values don't make a difference
 177  */
 178
 179 static struct regval stk1125_initvals[] = {
 180         /*TODO: What means this sequence? */
 181         {0x0000, 0x24},
 182         {0x0100, 0x21},
 183         {0x0002, 0x68},
 184         {0x0003, 0x80},
 185         {0x0005, 0x00},
 186         {0x0007, 0x03},
 187         {0x000d, 0x00},
 188         {0x000f, 0x02},
 189         {0x0300, 0x12},
 190         {0x0350, 0x41},
 191         {0x0351, 0x00},
 192         {0x0352, 0x00},
 193         {0x0353, 0x00},
 194         {0x0018, 0x10},
 195         {0x0019, 0x00},
 196         {0x001b, 0x0e},
 197         {0x001c, 0x46},
 198         {0x0300, 0x80},
 199         {0x001a, 0x04},
 200         {0x0110, 0x00},
 201         {0x0111, 0x00},
 202         {0x0112, 0x00},
 203         {0x0113, 0x00},
 204
 205         {0xffff, 0xff},
 206 };
 207
 208
 209 static int stk_initialise(struct stk_camera *dev)
 210 {
 211         struct regval *rv;
 212         int ret;
 213         if (!is_present(dev))
 214                 return -ENODEV;
 215         if (is_initialised(dev))
 216                 return 0;
 217         rv = stk1125_initvals;
 218         while (rv->reg != 0xffff) {
 219                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 220                 if (ret)
 221                         return ret;
 222                 rv++;
 223         }
 224         if (stk_sensor_init(dev) == 0) {
 225                 set_initialised(dev);
 226                 return 0;
 227         } else
 228                 return -1;
 229 }
 230
 231 /* *********************************************** */
 232 /*
 233  * This function is called as an URB transfert is complete (Isochronous pipe).
 234  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 235  * and not stall. Neat.
 236  */
 237 static void stk_isoc_handler(struct urb *urb)
 238 {
 239         int i;
 240         int ret;
 241         int framelen;
 242         unsigned long flags;
 243
 244         unsigned char *fill = NULL;
 245         unsigned char *iso_buf = NULL;
 246
 247         struct stk_camera *dev;
 248         struct stk_sio_buffer *fb;
 249
 250         dev = (struct stk_camera *) urb->context;
 251
 252         if (dev == NULL) {
 253                 STK_ERROR("isoc_handler called with NULL device !\n");
 254                 return;
 255         }
 256
 257         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 258                 || urb->status == -ESHUTDOWN) {
 259                 atomic_dec(&dev->urbs_used);
 260                 return;
 261         }
 262
 263         spin_lock_irqsave(&dev->spinlock, flags);
 264
 265         if (urb->status != -EINPROGRESS && urb->status != 0) {
 266                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 267                 goto resubmit;
 268         }
 269
 270         if (list_empty(&dev->sio_avail)) {
 271                 /*FIXME Stop streaming after a while */
 272                 (void) (printk_ratelimit() &&
 273                 STK_ERROR("isoc_handler without available buffer!\n"));
 274                 goto resubmit;
 275         }
 276         fb = list_first_entry(&dev->sio_avail,
 277                         struct stk_sio_buffer, list);
 278         fill = fb->buffer + fb->v4lbuf.bytesused;
 279
 280         for (i = 0; i < urb->number_of_packets; i++) {
 281                 if (urb->iso_frame_desc[i].status != 0) {
 282                         if (urb->iso_frame_desc[i].status != -EXDEV)
 283                                 STK_ERROR("Frame %d has error %d\n", i,
 284                                         urb->iso_frame_desc[i].status);
 285                         continue;
 286                 }
 287                 framelen = urb->iso_frame_desc[i].actual_length;
 288                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 289
 290                 if (framelen <= 4)
 291                         continue; /* no data */
 292
 293                 /*
 294                  * we found something informational from there
 295                  * the isoc frames have to type of headers
 296                  * type1: 00 xx 00 00 or 20 xx 00 00
 297                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 298                  * xx is a sequencer which has never been seen over 0x3f
 299                  * imho data written down looks like bayer, i see similarities
 300                  * after every 640 bytes
 301                  */
 302                 if (*iso_buf & 0x80) {
 303                         framelen -= 8;
 304                         iso_buf += 8;
 305                         /* This marks a new frame */
 306                         if (fb->v4lbuf.bytesused != 0
 307                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 308                                 (void) (printk_ratelimit() &&
 309                                 STK_ERROR("frame %d, "
 310                                         "bytesused=%d, skipping\n",
 311                                         i, fb->v4lbuf.bytesused));
 312                                 fb->v4lbuf.bytesused = 0;
 313                                 fill = fb->buffer;
 314                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 315                                 if (list_is_singular(&dev->sio_avail)) {
 316                                         /* Always reuse the last buffer */
 317                                         fb->v4lbuf.bytesused = 0;
 318                                         fill = fb->buffer;
 319                                 } else {
 320                                         list_move_tail(dev->sio_avail.next,
 321                                                 &dev->sio_full);
 322                                         wake_up(&dev->wait_frame);
 323                                         fb = list_first_entry(&dev->sio_avail,
 324                                                 struct stk_sio_buffer, list);
 325                                         fb->v4lbuf.bytesused = 0;
 326                                         fill = fb->buffer;
 327                                 }
 328                         }
 329                 } else {
 330                         framelen -= 4;
 331                         iso_buf += 4;
 332                 }
 333
 334                 /* Our buffer is full !!! */
 335                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 336                         (void) (printk_ratelimit() &&
 337                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 338                         /*FIXME Do something here? */
 339                         continue;
 340                 }
 341                 spin_unlock_irqrestore(&dev->spinlock, flags);
 342                 memcpy(fill, iso_buf, framelen);
 343                 spin_lock_irqsave(&dev->spinlock, flags);
 344                 fill += framelen;
 345
 346                 /* New size of our buffer */
 347                 fb->v4lbuf.bytesused += framelen;
 348         }
 349
 350 resubmit:
 351         spin_unlock_irqrestore(&dev->spinlock, flags);
 352         urb->dev = dev->udev;
 353         ret = usb_submit_urb(urb, GFP_ATOMIC);
 354         if (ret != 0) {
 355                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 356                         ret);
 357         }
 358 }
 359
 360 /* -------------------------------------------- */
 361
 362 static int stk_prepare_iso(struct stk_camera *dev)
 363 {
 364         void *kbuf;
 365         int i, j;
 366         struct urb *urb;
 367         struct usb_device *udev;
 368
 369         if (dev == NULL)
 370                 return -ENXIO;
 371         udev = dev->udev;
 372
 373         if (dev->isobufs)
 374                 STK_ERROR("isobufs already allocated. Bad\n");
 375         else
 376                 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
 377                                        GFP_KERNEL);
 378         if (dev->isobufs == NULL) {
 379                 STK_ERROR("Unable to allocate iso buffers\n");
 380                 return -ENOMEM;
 381         }
 382         for (i = 0; i < MAX_ISO_BUFS; i++) {
 383                 if (dev->isobufs[i].data == NULL) {
 384                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 385                         if (kbuf == NULL) {
 386                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 387                                         i);
 388                                 goto isobufs_out;
 389                         }
 390                         dev->isobufs[i].data = kbuf;
 391                 } else
 392                         STK_ERROR("isobuf data already allocated\n");
 393                 if (dev->isobufs[i].urb == NULL) {
 394                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 395                         if (urb == NULL) {
 396                                 STK_ERROR("Failed to allocate URB %d\n", i);
 397                                 goto isobufs_out;
 398                         }
 399                         dev->isobufs[i].urb = urb;
 400                 } else {
 401                         STK_ERROR("Killing URB\n");
 402                         usb_kill_urb(dev->isobufs[i].urb);
 403                         urb = dev->isobufs[i].urb;
 404                 }
 405                 urb->interval = 1;
 406                 urb->dev = udev;
 407                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 408                 urb->transfer_flags = URB_ISO_ASAP;
 409                 urb->transfer_buffer = dev->isobufs[i].data;
 410                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 411                 urb->complete = stk_isoc_handler;
 412                 urb->context = dev;
 413                 urb->start_frame = 0;
 414                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 415
 416                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 417                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 418                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 419                 }
 420         }
 421         set_memallocd(dev);
 422         return 0;
 423
 424 isobufs_out:
 425         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 426                 kfree(dev->isobufs[i].data);
 427         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 428                 usb_free_urb(dev->isobufs[i].urb);
 429         kfree(dev->isobufs);
 430         dev->isobufs = NULL;
 431         return -ENOMEM;
 432 }
 433
 434 static void stk_clean_iso(struct stk_camera *dev)
 435 {
 436         int i;
 437
 438         if (dev == NULL || dev->isobufs == NULL)
 439                 return;
 440
 441         for (i = 0; i < MAX_ISO_BUFS; i++) {
 442                 struct urb *urb;
 443
 444                 urb = dev->isobufs[i].urb;
 445                 if (urb) {
 446                         if (atomic_read(&dev->urbs_used) && is_present(dev))
 447                                 usb_kill_urb(urb);
 448                         usb_free_urb(urb);
 449                 }
 450                 kfree(dev->isobufs[i].data);
 451         }
 452         kfree(dev->isobufs);
 453         dev->isobufs = NULL;
 454         unset_memallocd(dev);
 455 }
 456
 457 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 458 {
 459         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 460         INIT_LIST_HEAD(&buf->list);
 461         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 462         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 463         if (buf->buffer == NULL)
 464                 return -ENOMEM;
 465         buf->mapcount = 0;
 466         buf->dev = dev;
 467         buf->v4lbuf.index = index;
 468         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 469         buf->v4lbuf.field = V4L2_FIELD_NONE;
 470         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 471         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 472         return 0;
 473 }
 474
 475 static int stk_free_sio_buffers(struct stk_camera *dev)
 476 {
 477         int i;
 478         int nbufs;
 479         unsigned long flags;
 480         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 481                 return 0;
 482         /*
 483         * If any buffers are mapped, we cannot free them at all.
 484         */
 485         for (i = 0; i < dev->n_sbufs; i++) {
 486                 if (dev->sio_bufs[i].mapcount > 0)
 487                         return -EBUSY;
 488         }
 489         /*
 490         * OK, let's do it.
 491         */
 492         spin_lock_irqsave(&dev->spinlock, flags);
 493         INIT_LIST_HEAD(&dev->sio_avail);
 494         INIT_LIST_HEAD(&dev->sio_full);
 495         nbufs = dev->n_sbufs;
 496         dev->n_sbufs = 0;
 497         spin_unlock_irqrestore(&dev->spinlock, flags);
 498         for (i = 0; i < nbufs; i++) {
 499                 if (dev->sio_bufs[i].buffer != NULL)
 500                         vfree(dev->sio_bufs[i].buffer);
 501         }
 502         kfree(dev->sio_bufs);
 503         dev->sio_bufs = NULL;
 504         return 0;
 505 }
 506
 507 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 508 {
 509         int i;
 510         if (dev->sio_bufs != NULL)
 511                 STK_ERROR("sio_bufs already allocated\n");
 512         else {
 513                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 514                                 GFP_KERNEL);
 515                 if (dev->sio_bufs == NULL)
 516                         return -ENOMEM;
 517                 for (i = 0; i < n_sbufs; i++) {
 518                         if (stk_setup_siobuf(dev, i))
 519                                 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
 520                         dev->n_sbufs = i+1;
 521                 }
 522         }
 523         return 0;
 524 }
 525
 526 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 527 {
 528         int err;
 529         err = stk_prepare_iso(dev);
 530         if (err) {
 531                 stk_clean_iso(dev);
 532                 return err;
 533         }
 534         err = stk_prepare_sio_buffers(dev, n_sbufs);
 535         if (err) {
 536                 stk_free_sio_buffers(dev);
 537                 return err;
 538         }
 539         return 0;
 540 }
 541
 542 static void stk_free_buffers(struct stk_camera *dev)
 543 {
 544         stk_clean_iso(dev);
 545         stk_free_sio_buffers(dev);
 546 }
 547 /* -------------------------------------------- */
 548
 549 /* v4l file operations */
 550
 551 static int v4l_stk_open(struct file *fp)
 552 {
 553         static int first_init = 1; /* webcam LED management */
 554         struct stk_camera *dev;
 555         struct video_device *vdev;
 556
 557         vdev = video_devdata(fp);
 558         dev = vdev_to_camera(vdev);
 559
 560         if (dev == NULL || !is_present(dev))
 561                 return -ENXIO;
 562
 563         if (!first_init)
 564                 stk_camera_write_reg(dev, 0x0, 0x24);
 565         else
 566                 first_init = 0;
 567
 568         fp->private_data = dev;
 569         usb_autopm_get_interface(dev->interface);
 570
 571         return 0;
 572 }
 573
 574 static int v4l_stk_release(struct file *fp)
 575 {
 576         struct stk_camera *dev = fp->private_data;
 577
 578         if (dev->owner == fp) {
 579                 stk_stop_stream(dev);
 580                 stk_free_buffers(dev);
 581                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
 582                 unset_initialised(dev);
 583                 dev->owner = NULL;
 584         }
 585
 586         if (is_present(dev))
 587                 usb_autopm_put_interface(dev->interface);
 588
 589         return 0;
 590 }
 591
 592 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 593                 size_t count, loff_t *f_pos)
 594 {
 595         int i;
 596         int ret;
 597         unsigned long flags;
 598         struct stk_sio_buffer *sbuf;
 599         struct stk_camera *dev = fp->private_data;
 600
 601         if (!is_present(dev))
 602                 return -EIO;
 603         if (dev->owner && dev->owner != fp)
 604                 return -EBUSY;
 605         dev->owner = fp;
 606         if (!is_streaming(dev)) {
 607                 if (stk_initialise(dev)
 608                         || stk_allocate_buffers(dev, 3)
 609                         || stk_start_stream(dev))
 610                         return -ENOMEM;
 611                 spin_lock_irqsave(&dev->spinlock, flags);
 612                 for (i = 0; i < dev->n_sbufs; i++) {
 613                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 614                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 615                 }
 616                 spin_unlock_irqrestore(&dev->spinlock, flags);
 617         }
 618         if (*f_pos == 0) {
 619                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 620                         return -EWOULDBLOCK;
 621                 ret = wait_event_interruptible(dev->wait_frame,
 622                         !list_empty(&dev->sio_full) || !is_present(dev));
 623                 if (ret)
 624                         return ret;
 625                 if (!is_present(dev))
 626                         return -EIO;
 627         }
 628         if (count + *f_pos > dev->frame_size)
 629                 count = dev->frame_size - *f_pos;
 630         spin_lock_irqsave(&dev->spinlock, flags);
 631         if (list_empty(&dev->sio_full)) {
 632                 spin_unlock_irqrestore(&dev->spinlock, flags);
 633                 STK_ERROR("BUG: No siobufs ready\n");
 634                 return 0;
 635         }
 636         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 637         spin_unlock_irqrestore(&dev->spinlock, flags);
 638
 639         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 640                 return -EFAULT;
 641
 642         *f_pos += count;
 643
 644         if (*f_pos >= dev->frame_size) {
 645                 *f_pos = 0;
 646                 spin_lock_irqsave(&dev->spinlock, flags);
 647                 list_move_tail(&sbuf->list, &dev->sio_avail);
 648                 spin_unlock_irqrestore(&dev->spinlock, flags);
 649         }
 650         return count;
 651 }
 652
 653 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 654 {
 655         struct stk_camera *dev = fp->private_data;
 656
 657         poll_wait(fp, &dev->wait_frame, wait);
 658
 659         if (!is_present(dev))
 660                 return POLLERR;
 661
 662         if (!list_empty(&dev->sio_full))
 663                 return POLLIN | POLLRDNORM;
 664
 665         return 0;
 666 }
 667
 668
 669 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 670 {
 671         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 672         sbuf->mapcount++;
 673 }
 674 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 675 {
 676         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 677         sbuf->mapcount--;
 678         if (sbuf->mapcount == 0)
 679                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 680 }
 681 static const struct vm_operations_struct stk_v4l_vm_ops = {
 682         .open = stk_v4l_vm_open,
 683         .close = stk_v4l_vm_close
 684 };
 685
 686 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 687 {
 688         unsigned int i;
 689         int ret;
 690         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 691         struct stk_camera *dev = fp->private_data;
 692         struct stk_sio_buffer *sbuf = NULL;
 693
 694         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 695                 return -EINVAL;
 696
 697         for (i = 0; i < dev->n_sbufs; i++) {
 698                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 699                         sbuf = dev->sio_bufs + i;
 700                         break;
 701                 }
 702         }
 703         if (sbuf == NULL)
 704                 return -EINVAL;
 705         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 706         if (ret)
 707                 return ret;
 708         vma->vm_flags |= VM_DONTEXPAND;
 709         vma->vm_private_data = sbuf;
 710         vma->vm_ops = &stk_v4l_vm_ops;
 711         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 712         stk_v4l_vm_open(vma);
 713         return 0;
 714 }
 715
 716 /* v4l ioctl handlers */
 717
 718 static int stk_vidioc_querycap(struct file *filp,
 719                 void *priv, struct v4l2_capability *cap)
 720 {
 721         strcpy(cap->driver, "stk");
 722         strcpy(cap->card, "stk");
 723         cap->version = DRIVER_VERSION_NUM;
 724
 725         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 726                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 727         return 0;
 728 }
 729
 730 static int stk_vidioc_enum_input(struct file *filp,
 731                 void *priv, struct v4l2_input *input)
 732 {
 733         if (input->index != 0)
 734                 return -EINVAL;
 735
 736         strcpy(input->name, "Syntek USB Camera");
 737         input->type = V4L2_INPUT_TYPE_CAMERA;
 738         return 0;
 739 }
 740
 741
 742 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 743 {
 744         *i = 0;
 745         return 0;
 746 }
 747
 748 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 749 {
 750         if (i != 0)
 751                 return -EINVAL;
 752         else
 753                 return 0;
 754 }
 755
 756 /* from vivi.c */
 757 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 758 {
 759         return 0;
 760 }
 761
 762 /* List of all V4Lv2 controls supported by the driver */
 763 static struct v4l2_queryctrl stk_controls[] = {
 764         {
 765                 .id      = V4L2_CID_BRIGHTNESS,
 766                 .type    = V4L2_CTRL_TYPE_INTEGER,
 767                 .name    = "Brightness",
 768                 .minimum = 0,
 769                 .maximum = 0xffff,
 770                 .step    = 0x0100,
 771                 .default_value = 0x6000,
 772         },
 773         {
 774                 .id      = V4L2_CID_HFLIP,
 775                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
 776                 .name    = "Horizontal Flip",
 777                 .minimum = 0,
 778                 .maximum = 1,
 779                 .step    = 1,
 780                 .default_value = 1,
 781         },
 782         {
 783                 .id      = V4L2_CID_VFLIP,
 784                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
 785                 .name    = "Vertical Flip",
 786                 .minimum = 0,
 787                 .maximum = 1,
 788                 .step    = 1,
 789                 .default_value = 1,
 790         },
 791 };
 792
 793 static int stk_vidioc_queryctrl(struct file *filp,
 794                 void *priv, struct v4l2_queryctrl *c)
 795 {
 796         int i;
 797         int nbr;
 798         nbr = ARRAY_SIZE(stk_controls);
 799
 800         for (i = 0; i < nbr; i++) {
 801                 if (stk_controls[i].id == c->id) {
 802                         memcpy(c, &stk_controls[i],
 803                                 sizeof(struct v4l2_queryctrl));
 804                         return 0;
 805                 }
 806         }
 807         return -EINVAL;
 808 }
 809
 810 static int stk_vidioc_g_ctrl(struct file *filp,
 811                 void *priv, struct v4l2_control *c)
 812 {
 813         struct stk_camera *dev = priv;
 814         switch (c->id) {
 815         case V4L2_CID_BRIGHTNESS:
 816                 c->value = dev->vsettings.brightness;
 817                 break;
 818         case V4L2_CID_HFLIP:
 819                 c->value = dev->vsettings.hflip;
 820                 break;
 821         case V4L2_CID_VFLIP:
 822                 c->value = dev->vsettings.vflip;
 823                 break;
 824         default:
 825                 return -EINVAL;
 826         }
 827         return 0;
 828 }
 829
 830 static int stk_vidioc_s_ctrl(struct file *filp,
 831                 void *priv, struct v4l2_control *c)
 832 {
 833         struct stk_camera *dev = priv;
 834         switch (c->id) {
 835         case V4L2_CID_BRIGHTNESS:
 836                 dev->vsettings.brightness = c->value;
 837                 return stk_sensor_set_brightness(dev, c->value >> 8);
 838         case V4L2_CID_HFLIP:
 839                 dev->vsettings.hflip = c->value;
 840                 return 0;
 841         case V4L2_CID_VFLIP:
 842                 dev->vsettings.vflip = c->value;
 843                 return 0;
 844         default:
 845                 return -EINVAL;
 846         }
 847         return 0;
 848 }
 849
 850
 851 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 852                 void *priv, struct v4l2_fmtdesc *fmtd)
 853 {
 854         switch (fmtd->index) {
 855         case 0:
 856                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 857                 strcpy(fmtd->description, "r5g6b5");
 858                 break;
 859         case 1:
 860                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 861                 strcpy(fmtd->description, "r5g6b5BE");
 862                 break;
 863         case 2:
 864                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 865                 strcpy(fmtd->description, "yuv4:2:2");
 866                 break;
 867         case 3:
 868                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 869                 strcpy(fmtd->description, "Raw bayer");
 870                 break;
 871         case 4:
 872                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 873                 strcpy(fmtd->description, "yuv4:2:2");
 874                 break;
 875         default:
 876                 return -EINVAL;
 877         }
 878         return 0;
 879 }
 880
 881 static struct stk_size {
 882         unsigned w;
 883         unsigned h;
 884         enum stk_mode m;
 885 } stk_sizes[] = {
 886         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 887         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 888         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 889         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 890         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 891 };
 892
 893 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 894                 void *priv, struct v4l2_format *f)
 895 {
 896         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 897         struct stk_camera *dev = priv;
 898         int i;
 899
 900         for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
 901                         stk_sizes[i].m != dev->vsettings.mode; i++)
 902                 ;
 903         if (i == ARRAY_SIZE(stk_sizes)) {
 904                 STK_ERROR("ERROR: mode invalid\n");
 905                 return -EINVAL;
 906         }
 907         pix_format->width = stk_sizes[i].w;
 908         pix_format->height = stk_sizes[i].h;
 909         pix_format->field = V4L2_FIELD_NONE;
 910         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 911         pix_format->pixelformat = dev->vsettings.palette;
 912         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 913                 pix_format->bytesperline = pix_format->width;
 914         else
 915                 pix_format->bytesperline = 2 * pix_format->width;
 916         pix_format->sizeimage = pix_format->bytesperline
 917                                 * pix_format->height;
 918         return 0;
 919 }
 920
 921 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
 922                 void *priv, struct v4l2_format *fmtd)
 923 {
 924         int i;
 925         switch (fmtd->fmt.pix.pixelformat) {
 926         case V4L2_PIX_FMT_RGB565:
 927         case V4L2_PIX_FMT_RGB565X:
 928         case V4L2_PIX_FMT_UYVY:
 929         case V4L2_PIX_FMT_YUYV:
 930         case V4L2_PIX_FMT_SBGGR8:
 931                 break;
 932         default:
 933                 return -EINVAL;
 934         }
 935         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
 936                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
 937                         break;
 938         }
 939         if (i == ARRAY_SIZE(stk_sizes)
 940                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
 941                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
 942                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
 943                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
 944                 fmtd->fmt.pix.priv = i - 1;
 945         } else {
 946                 fmtd->fmt.pix.height = stk_sizes[i].h;
 947                 fmtd->fmt.pix.width = stk_sizes[i].w;
 948                 fmtd->fmt.pix.priv = i;
 949         }
 950
 951         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
 952         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 953         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
 954                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
 955         else
 956                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
 957         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
 958                 * fmtd->fmt.pix.height;
 959         return 0;
 960 }
 961
 962 static int stk_setup_format(struct stk_camera *dev)
 963 {
 964         int i = 0;
 965         int depth;
 966         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 967                 depth = 1;
 968         else
 969                 depth = 2;
 970         while (i < ARRAY_SIZE(stk_sizes) &&
 971                         stk_sizes[i].m != dev->vsettings.mode)
 972                 i++;
 973         if (i == ARRAY_SIZE(stk_sizes)) {
 974                 STK_ERROR("Something is broken in %s\n", __func__);
 975                 return -EFAULT;
 976         }
 977         /* This registers controls some timings, not sure of what. */
 978         stk_camera_write_reg(dev, 0x001b, 0x0e);
 979         if (dev->vsettings.mode == MODE_SXGA)
 980                 stk_camera_write_reg(dev, 0x001c, 0x0e);
 981         else
 982                 stk_camera_write_reg(dev, 0x001c, 0x46);
 983         /*
 984          * Registers 0x0115 0x0114 are the size of each line (bytes),
 985          * regs 0x0117 0x0116 are the heigth of the image.
 986          */
 987         stk_camera_write_reg(dev, 0x0115,
 988                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
 989         stk_camera_write_reg(dev, 0x0114,
 990                 (stk_sizes[i].w * depth) & 0xff);
 991         stk_camera_write_reg(dev, 0x0117,
 992                 (stk_sizes[i].h >> 8) & 0xff);
 993         stk_camera_write_reg(dev, 0x0116,
 994                 stk_sizes[i].h & 0xff);
 995         return stk_sensor_configure(dev);
 996 }
 997
 998 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
 999                 void *priv, struct v4l2_format *fmtd)
1000 {
1001         int ret;
1002         struct stk_camera *dev = priv;
1003
1004         if (dev == NULL)
1005                 return -ENODEV;
1006         if (!is_present(dev))
1007                 return -ENODEV;
1008         if (is_streaming(dev))
1009                 return -EBUSY;
1010         if (dev->owner && dev->owner != filp)
1011                 return -EBUSY;
1012         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1013         if (ret)
1014                 return ret;
1015         dev->owner = filp;
1016
1017         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1018         stk_free_buffers(dev);
1019         dev->frame_size = fmtd->fmt.pix.sizeimage;
1020         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1021
1022         stk_initialise(dev);
1023         return stk_setup_format(dev);
1024 }
1025
1026 static int stk_vidioc_reqbufs(struct file *filp,
1027                 void *priv, struct v4l2_requestbuffers *rb)
1028 {
1029         struct stk_camera *dev = priv;
1030
1031         if (dev == NULL)
1032                 return -ENODEV;
1033         if (rb->memory != V4L2_MEMORY_MMAP)
1034                 return -EINVAL;
1035         if (is_streaming(dev)
1036                 || (dev->owner && dev->owner != filp))
1037                 return -EBUSY;
1038         dev->owner = filp;
1039
1040         /*FIXME If they ask for zero, we must stop streaming and free */
1041         if (rb->count < 3)
1042                 rb->count = 3;
1043         /* Arbitrary limit */
1044         else if (rb->count > 5)
1045                 rb->count = 5;
1046
1047         stk_allocate_buffers(dev, rb->count);
1048         rb->count = dev->n_sbufs;
1049         return 0;
1050 }
1051
1052 static int stk_vidioc_querybuf(struct file *filp,
1053                 void *priv, struct v4l2_buffer *buf)
1054 {
1055         struct stk_camera *dev = priv;
1056         struct stk_sio_buffer *sbuf;
1057
1058         if (buf->index >= dev->n_sbufs)
1059                 return -EINVAL;
1060         sbuf = dev->sio_bufs + buf->index;
1061         *buf = sbuf->v4lbuf;
1062         return 0;
1063 }
1064
1065 static int stk_vidioc_qbuf(struct file *filp,
1066                 void *priv, struct v4l2_buffer *buf)
1067 {
1068         struct stk_camera *dev = priv;
1069         struct stk_sio_buffer *sbuf;
1070         unsigned long flags;
1071
1072         if (buf->memory != V4L2_MEMORY_MMAP)
1073                 return -EINVAL;
1074
1075         if (buf->index >= dev->n_sbufs)
1076                 return -EINVAL;
1077         sbuf = dev->sio_bufs + buf->index;
1078         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1079                 return 0;
1080         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1081         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1082         spin_lock_irqsave(&dev->spinlock, flags);
1083         list_add_tail(&sbuf->list, &dev->sio_avail);
1084         *buf = sbuf->v4lbuf;
1085         spin_unlock_irqrestore(&dev->spinlock, flags);
1086         return 0;
1087 }
1088
1089 static int stk_vidioc_dqbuf(struct file *filp,
1090                 void *priv, struct v4l2_buffer *buf)
1091 {
1092         struct stk_camera *dev = priv;
1093         struct stk_sio_buffer *sbuf;
1094         unsigned long flags;
1095         int ret;
1096
1097         if (!is_streaming(dev))
1098                 return -EINVAL;
1099
1100         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1101                 return -EWOULDBLOCK;
1102         ret = wait_event_interruptible(dev->wait_frame,
1103                 !list_empty(&dev->sio_full) || !is_present(dev));
1104         if (ret)
1105                 return ret;
1106         if (!is_present(dev))
1107                 return -EIO;
1108
1109         spin_lock_irqsave(&dev->spinlock, flags);
1110         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1111         list_del_init(&sbuf->list);
1112         spin_unlock_irqrestore(&dev->spinlock, flags);
1113         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1114         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1115         sbuf->v4lbuf.sequence = ++dev->sequence;
1116         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1117
1118         *buf = sbuf->v4lbuf;
1119         return 0;
1120 }
1121
1122 static int stk_vidioc_streamon(struct file *filp,
1123                 void *priv, enum v4l2_buf_type type)
1124 {
1125         struct stk_camera *dev = priv;
1126         if (is_streaming(dev))
1127                 return 0;
1128         if (dev->sio_bufs == NULL)
1129                 return -EINVAL;
1130         dev->sequence = 0;
1131         return stk_start_stream(dev);
1132 }
1133
1134 static int stk_vidioc_streamoff(struct file *filp,
1135                 void *priv, enum v4l2_buf_type type)
1136 {
1137         struct stk_camera *dev = priv;
1138         unsigned long flags;
1139         int i;
1140         stk_stop_stream(dev);
1141         spin_lock_irqsave(&dev->spinlock, flags);
1142         INIT_LIST_HEAD(&dev->sio_avail);
1143         INIT_LIST_HEAD(&dev->sio_full);
1144         for (i = 0; i < dev->n_sbufs; i++) {
1145                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1146                 dev->sio_bufs[i].v4lbuf.flags = 0;
1147         }
1148         spin_unlock_irqrestore(&dev->spinlock, flags);
1149         return 0;
1150 }
1151
1152
1153 static int stk_vidioc_g_parm(struct file *filp,
1154                 void *priv, struct v4l2_streamparm *sp)
1155 {
1156         /*FIXME This is not correct */
1157         sp->parm.capture.timeperframe.numerator = 1;
1158         sp->parm.capture.timeperframe.denominator = 30;
1159         sp->parm.capture.readbuffers = 2;
1160         return 0;
1161 }
1162
1163 static int stk_vidioc_enum_framesizes(struct file *filp,
1164                 void *priv, struct v4l2_frmsizeenum *frms)
1165 {
1166         if (frms->index >= ARRAY_SIZE(stk_sizes))
1167                 return -EINVAL;
1168         switch (frms->pixel_format) {
1169         case V4L2_PIX_FMT_RGB565:
1170         case V4L2_PIX_FMT_RGB565X:
1171         case V4L2_PIX_FMT_UYVY:
1172         case V4L2_PIX_FMT_YUYV:
1173         case V4L2_PIX_FMT_SBGGR8:
1174                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1175                 frms->discrete.width = stk_sizes[frms->index].w;
1176                 frms->discrete.height = stk_sizes[frms->index].h;
1177                 return 0;
1178         default: return -EINVAL;
1179         }
1180 }
1181
1182 static struct v4l2_file_operations v4l_stk_fops = {
1183         .owner = THIS_MODULE,
1184         .open = v4l_stk_open,
1185         .release = v4l_stk_release,
1186         .read = v4l_stk_read,
1187         .poll = v4l_stk_poll,
1188         .mmap = v4l_stk_mmap,
1189         .ioctl = video_ioctl2,
1190 };
1191
1192 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1193         .vidioc_querycap = stk_vidioc_querycap,
1194         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1195         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1196         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1197         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1198         .vidioc_enum_input = stk_vidioc_enum_input,
1199         .vidioc_s_input = stk_vidioc_s_input,
1200         .vidioc_g_input = stk_vidioc_g_input,
1201         .vidioc_s_std = stk_vidioc_s_std,
1202         .vidioc_reqbufs = stk_vidioc_reqbufs,
1203         .vidioc_querybuf = stk_vidioc_querybuf,
1204         .vidioc_qbuf = stk_vidioc_qbuf,
1205         .vidioc_dqbuf = stk_vidioc_dqbuf,
1206         .vidioc_streamon = stk_vidioc_streamon,
1207         .vidioc_streamoff = stk_vidioc_streamoff,
1208         .vidioc_queryctrl = stk_vidioc_queryctrl,
1209         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1210         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1211         .vidioc_g_parm = stk_vidioc_g_parm,
1212         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1213 };
1214
1215 static void stk_v4l_dev_release(struct video_device *vd)
1216 {
1217         struct stk_camera *dev = vdev_to_camera(vd);
1218
1219         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1220                 STK_ERROR("We are leaking memory\n");
1221         usb_put_intf(dev->interface);
1222         kfree(dev);
1223 }
1224
1225 static struct video_device stk_v4l_data = {
1226         .name = "stkwebcam",
1227         .tvnorms = V4L2_STD_UNKNOWN,
1228         .current_norm = V4L2_STD_UNKNOWN,
1229         .fops = &v4l_stk_fops,
1230         .ioctl_ops = &v4l_stk_ioctl_ops,
1231         .release = stk_v4l_dev_release,
1232 };
1233
1234
1235 static int stk_register_video_device(struct stk_camera *dev)
1236 {
1237         int err;
1238
1239         dev->vdev = stk_v4l_data;
1240         dev->vdev.debug = debug;
1241         dev->vdev.parent = &dev->interface->dev;
1242         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1243         if (err)
1244                 STK_ERROR("v4l registration failed\n");
1245         else
1246                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1247                          video_device_node_name(&dev->vdev));
1248         return err;
1249 }
1250
1251
1252 /* USB Stuff */
1253
1254 static int stk_camera_probe(struct usb_interface *interface,
1255                 const struct usb_device_id *id)
1256 {
1257         int i;
1258         int err = 0;
1259
1260         struct stk_camera *dev = NULL;
1261         struct usb_device *udev = interface_to_usbdev(interface);
1262         struct usb_host_interface *iface_desc;
1263         struct usb_endpoint_descriptor *endpoint;
1264
1265         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1266         if (dev == NULL) {
1267                 STK_ERROR("Out of memory !\n");
1268                 return -ENOMEM;
1269         }
1270
1271         spin_lock_init(&dev->spinlock);
1272         init_waitqueue_head(&dev->wait_frame);
1273
1274         dev->udev = udev;
1275         dev->interface = interface;
1276         usb_get_intf(interface);
1277
1278         dev->vsettings.vflip = vflip;
1279         dev->vsettings.hflip = hflip;
1280         dev->n_sbufs = 0;
1281         set_present(dev);
1282
1283         /* Set up the endpoint information
1284          * use only the first isoc-in endpoint
1285          * for the current alternate setting */
1286         iface_desc = interface->cur_altsetting;
1287
1288         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1289                 endpoint = &iface_desc->endpoint[i].desc;
1290
1291                 if (!dev->isoc_ep
1292                         && usb_endpoint_is_isoc_in(endpoint)) {
1293                         /* we found an isoc in endpoint */
1294                         dev->isoc_ep = usb_endpoint_num(endpoint);
1295                         break;
1296                 }
1297         }
1298         if (!dev->isoc_ep) {
1299                 STK_ERROR("Could not find isoc-in endpoint");
1300                 err = -ENODEV;
1301                 goto error;
1302         }
1303         dev->vsettings.brightness = 0x7fff;
1304         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1305         dev->vsettings.mode = MODE_VGA;
1306         dev->frame_size = 640 * 480 * 2;
1307
1308         INIT_LIST_HEAD(&dev->sio_avail);
1309         INIT_LIST_HEAD(&dev->sio_full);
1310
1311         usb_set_intfdata(interface, dev);
1312
1313         err = stk_register_video_device(dev);
1314         if (err)
1315                 goto error;
1316
1317         return 0;
1318
1319 error:
1320         kfree(dev);
1321         return err;
1322 }
1323
1324 static void stk_camera_disconnect(struct usb_interface *interface)
1325 {
1326         struct stk_camera *dev = usb_get_intfdata(interface);
1327
1328         usb_set_intfdata(interface, NULL);
1329         unset_present(dev);
1330
1331         wake_up_interruptible(&dev->wait_frame);
1332
1333         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1334                  video_device_node_name(&dev->vdev));
1335
1336         video_unregister_device(&dev->vdev);
1337 }
1338
1339 #ifdef CONFIG_PM
1340 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1341 {
1342         struct stk_camera *dev = usb_get_intfdata(intf);
1343         if (is_streaming(dev)) {
1344                 stk_stop_stream(dev);
1345                 /* yes, this is ugly */
1346                 set_streaming(dev);
1347         }
1348         return 0;
1349 }
1350
1351 static int stk_camera_resume(struct usb_interface *intf)
1352 {
1353         struct stk_camera *dev = usb_get_intfdata(intf);
1354         if (!is_initialised(dev))
1355                 return 0;
1356         unset_initialised(dev);
1357         stk_initialise(dev);
1358         stk_camera_write_reg(dev, 0x0, 0x49);
1359         stk_setup_format(dev);
1360         if (is_streaming(dev))
1361                 stk_start_stream(dev);
1362         return 0;
1363 }
1364 #endif
1365
1366 static struct usb_driver stk_camera_driver = {
1367         .name = "stkwebcam",
1368         .probe = stk_camera_probe,
1369         .disconnect = stk_camera_disconnect,
1370         .id_table = stkwebcam_table,
1371 #ifdef CONFIG_PM
1372         .suspend = stk_camera_suspend,
1373         .resume = stk_camera_resume,
1374 #endif
1375 };
1376
1377 module_usb_driver(stk_camera_driver);