drivers/media/video/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 #include <linux/smp_lock.h>
  31
  32 #include <linux/usb.h>
  33 #include <linux/mm.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/videodev2.h>
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-ioctl.h>
  38
  39 #include "stk-webcam.h"
  40
  41
  42 static int hflip = 1;
  43 module_param(hflip, bool, 0444);
  44 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
  45
  46 static int vflip = 1;
  47 module_param(vflip, bool, 0444);
  48 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
  49
  50 static int debug;
  51 module_param(debug, int, 0444);
  52 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
  53
  54 MODULE_LICENSE("GPL");
  55 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
  56 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
  57
  58
  59
  60 /* Some cameras have audio interfaces, we aren't interested in those */
  61 static struct usb_device_id stkwebcam_table[] = {
  62         { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
  63         { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
  64         { }
  65 };
  66 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
  67
  68 /*
  69  * Basic stuff
  70  */
  71 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
  72 {
  73         struct usb_device *udev = dev->udev;
  74         int ret;
  75
  76         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  77                         0x01,
  78                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  79                         value,
  80                         index,
  81                         NULL,
  82                         0,
  83                         500);
  84         if (ret < 0)
  85                 return ret;
  86         else
  87                 return 0;
  88 }
  89
  90 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
  91 {
  92         struct usb_device *udev = dev->udev;
  93         int ret;
  94
  95         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  96                         0x00,
  97                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  98                         0x00,
  99                         index,
 100                         (u8 *) value,
 101                         sizeof(u8),
 102                         500);
 103         if (ret < 0)
 104                 return ret;
 105         else
 106                 return 0;
 107 }
 108
 109 static int stk_start_stream(struct stk_camera *dev)
 110 {
 111         int value;
 112         int i, ret;
 113         int value_116, value_117;
 114
 115         if (!is_present(dev))
 116                 return -ENODEV;
 117         if (!is_memallocd(dev) || !is_initialised(dev)) {
 118                 STK_ERROR("FIXME: Buffers are not allocated\n");
 119                 return -EFAULT;
 120         }
 121         ret = usb_set_interface(dev->udev, 0, 5);
 122
 123         if (ret < 0)
 124                 STK_ERROR("usb_set_interface failed !\n");
 125         if (stk_sensor_wakeup(dev))
 126                 STK_ERROR("error awaking the sensor\n");
 127
 128         stk_camera_read_reg(dev, 0x0116, &value_116);
 129         stk_camera_read_reg(dev, 0x0117, &value_117);
 130
 131         stk_camera_write_reg(dev, 0x0116, 0x0000);
 132         stk_camera_write_reg(dev, 0x0117, 0x0000);
 133
 134         stk_camera_read_reg(dev, 0x0100, &value);
 135         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 136
 137         stk_camera_write_reg(dev, 0x0116, value_116);
 138         stk_camera_write_reg(dev, 0x0117, value_117);
 139         for (i = 0; i < MAX_ISO_BUFS; i++) {
 140                 if (dev->isobufs[i].urb) {
 141                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 142                         atomic_inc(&dev->urbs_used);
 143                         if (ret)
 144                                 return ret;
 145                 }
 146         }
 147         set_streaming(dev);
 148         return 0;
 149 }
 150
 151 static int stk_stop_stream(struct stk_camera *dev)
 152 {
 153         int value;
 154         int i;
 155         if (is_present(dev)) {
 156                 stk_camera_read_reg(dev, 0x0100, &value);
 157                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 158                 if (dev->isobufs != NULL) {
 159                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 160                                 if (dev->isobufs[i].urb)
 161                                         usb_kill_urb(dev->isobufs[i].urb);
 162                         }
 163                 }
 164                 unset_streaming(dev);
 165
 166                 if (usb_set_interface(dev->udev, 0, 0))
 167                         STK_ERROR("usb_set_interface failed !\n");
 168                 if (stk_sensor_sleep(dev))
 169                         STK_ERROR("error suspending the sensor\n");
 170         }
 171         return 0;
 172 }
 173
 174 /*
 175  * This seems to be the shortest init sequence we
 176  * must do in order to find the sensor
 177  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 178  * is also reset. Maybe powers down it?
 179  * Rest of values don't make a difference
 180  */
 181
 182 static struct regval stk1125_initvals[] = {
 183         /*TODO: What means this sequence? */
 184         {0x0000, 0x24},
 185         {0x0100, 0x21},
 186         {0x0002, 0x68},
 187         {0x0003, 0x80},
 188         {0x0005, 0x00},
 189         {0x0007, 0x03},
 190         {0x000d, 0x00},
 191         {0x000f, 0x02},
 192         {0x0300, 0x12},
 193         {0x0350, 0x41},
 194         {0x0351, 0x00},
 195         {0x0352, 0x00},
 196         {0x0353, 0x00},
 197         {0x0018, 0x10},
 198         {0x0019, 0x00},
 199         {0x001b, 0x0e},
 200         {0x001c, 0x46},
 201         {0x0300, 0x80},
 202         {0x001a, 0x04},
 203         {0x0110, 0x00},
 204         {0x0111, 0x00},
 205         {0x0112, 0x00},
 206         {0x0113, 0x00},
 207
 208         {0xffff, 0xff},
 209 };
 210
 211
 212 static int stk_initialise(struct stk_camera *dev)
 213 {
 214         struct regval *rv;
 215         int ret;
 216         if (!is_present(dev))
 217                 return -ENODEV;
 218         if (is_initialised(dev))
 219                 return 0;
 220         rv = stk1125_initvals;
 221         while (rv->reg != 0xffff) {
 222                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 223                 if (ret)
 224                         return ret;
 225                 rv++;
 226         }
 227         if (stk_sensor_init(dev) == 0) {
 228                 set_initialised(dev);
 229                 return 0;
 230         } else
 231                 return -1;
 232 }
 233
 234 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 235
 236 /* sysfs functions */
 237 /*FIXME cleanup this */
 238
 239 static ssize_t show_brightness(struct device *class,
 240                         struct device_attribute *attr, char *buf)
 241 {
 242         struct video_device *vdev = to_video_device(class);
 243         struct stk_camera *dev = vdev_to_camera(vdev);
 244
 245         return sprintf(buf, "%X\n", dev->vsettings.brightness);
 246 }
 247
 248 static ssize_t store_brightness(struct device *class,
 249                 struct device_attribute *attr, const char *buf, size_t count)
 250 {
 251         char *endp;
 252         unsigned long value;
 253         int ret;
 254
 255         struct video_device *vdev = to_video_device(class);
 256         struct stk_camera *dev = vdev_to_camera(vdev);
 257
 258         value = simple_strtoul(buf, &endp, 16);
 259
 260         dev->vsettings.brightness = (int) value;
 261
 262         ret = stk_sensor_set_brightness(dev, value >> 8);
 263         if (ret)
 264                 return ret;
 265         else
 266                 return count;
 267 }
 268
 269 static ssize_t show_hflip(struct device *class,
 270                 struct device_attribute *attr, char *buf)
 271 {
 272         struct video_device *vdev = to_video_device(class);
 273         struct stk_camera *dev = vdev_to_camera(vdev);
 274
 275         return sprintf(buf, "%d\n", dev->vsettings.hflip);
 276 }
 277
 278 static ssize_t store_hflip(struct device *class,
 279                 struct device_attribute *attr, const char *buf, size_t count)
 280 {
 281         struct video_device *vdev = to_video_device(class);
 282         struct stk_camera *dev = vdev_to_camera(vdev);
 283
 284         if (strncmp(buf, "1", 1) == 0)
 285                 dev->vsettings.hflip = 1;
 286         else if (strncmp(buf, "0", 1) == 0)
 287                 dev->vsettings.hflip = 0;
 288         else
 289                 return -EINVAL;
 290
 291         return strlen(buf);
 292 }
 293
 294 static ssize_t show_vflip(struct device *class,
 295                 struct device_attribute *attr, char *buf)
 296 {
 297         struct video_device *vdev = to_video_device(class);
 298         struct stk_camera *dev = vdev_to_camera(vdev);
 299
 300         return sprintf(buf, "%d\n", dev->vsettings.vflip);
 301 }
 302
 303 static ssize_t store_vflip(struct device *class,
 304                 struct device_attribute *attr, const char *buf, size_t count)
 305 {
 306         struct video_device *vdev = to_video_device(class);
 307         struct stk_camera *dev = vdev_to_camera(vdev);
 308
 309         if (strncmp(buf, "1", 1) == 0)
 310                 dev->vsettings.vflip = 1;
 311         else if (strncmp(buf, "0", 1) == 0)
 312                 dev->vsettings.vflip = 0;
 313         else
 314                 return -EINVAL;
 315
 316         return strlen(buf);
 317 }
 318
 319 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
 320                         show_brightness, store_brightness);
 321 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
 322 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
 323
 324 static int stk_create_sysfs_files(struct video_device *vdev)
 325 {
 326         int ret;
 327
 328         ret = device_create_file(&vdev->dev, &dev_attr_brightness);
 329         ret += device_create_file(&vdev->dev, &dev_attr_hflip);
 330         ret += device_create_file(&vdev->dev, &dev_attr_vflip);
 331         if (ret)
 332                 STK_WARNING("Could not create sysfs files\n");
 333         return ret;
 334 }
 335
 336 static void stk_remove_sysfs_files(struct video_device *vdev)
 337 {
 338         device_remove_file(&vdev->dev, &dev_attr_brightness);
 339         device_remove_file(&vdev->dev, &dev_attr_hflip);
 340         device_remove_file(&vdev->dev, &dev_attr_vflip);
 341 }
 342
 343 #else
 344 #define stk_create_sysfs_files(a)
 345 #define stk_remove_sysfs_files(a)
 346 #endif
 347
 348 /* *********************************************** */
 349 /*
 350  * This function is called as an URB transfert is complete (Isochronous pipe).
 351  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 352  * and not stall. Neat.
 353  */
 354 static void stk_isoc_handler(struct urb *urb)
 355 {
 356         int i;
 357         int ret;
 358         int framelen;
 359         unsigned long flags;
 360
 361         unsigned char *fill = NULL;
 362         unsigned char *iso_buf = NULL;
 363
 364         struct stk_camera *dev;
 365         struct stk_sio_buffer *fb;
 366
 367         dev = (struct stk_camera *) urb->context;
 368
 369         if (dev == NULL) {
 370                 STK_ERROR("isoc_handler called with NULL device !\n");
 371                 return;
 372         }
 373
 374         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 375                 || urb->status == -ESHUTDOWN) {
 376                 atomic_dec(&dev->urbs_used);
 377                 return;
 378         }
 379
 380         spin_lock_irqsave(&dev->spinlock, flags);
 381
 382         if (urb->status != -EINPROGRESS && urb->status != 0) {
 383                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 384                 goto resubmit;
 385         }
 386
 387         if (list_empty(&dev->sio_avail)) {
 388                 /*FIXME Stop streaming after a while */
 389                 (void) (printk_ratelimit() &&
 390                 STK_ERROR("isoc_handler without available buffer!\n"));
 391                 goto resubmit;
 392         }
 393         fb = list_first_entry(&dev->sio_avail,
 394                         struct stk_sio_buffer, list);
 395         fill = fb->buffer + fb->v4lbuf.bytesused;
 396
 397         for (i = 0; i < urb->number_of_packets; i++) {
 398                 if (urb->iso_frame_desc[i].status != 0) {
 399                         if (urb->iso_frame_desc[i].status != -EXDEV)
 400                                 STK_ERROR("Frame %d has error %d\n", i,
 401                                         urb->iso_frame_desc[i].status);
 402                         continue;
 403                 }
 404                 framelen = urb->iso_frame_desc[i].actual_length;
 405                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 406
 407                 if (framelen <= 4)
 408                         continue; /* no data */
 409
 410                 /*
 411                  * we found something informational from there
 412                  * the isoc frames have to type of headers
 413                  * type1: 00 xx 00 00 or 20 xx 00 00
 414                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 415                  * xx is a sequencer which has never been seen over 0x3f
 416                  * imho data written down looks like bayer, i see similarities
 417                  * after every 640 bytes
 418                  */
 419                 if (*iso_buf & 0x80) {
 420                         framelen -= 8;
 421                         iso_buf += 8;
 422                         /* This marks a new frame */
 423                         if (fb->v4lbuf.bytesused != 0
 424                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 425                                 (void) (printk_ratelimit() &&
 426                                 STK_ERROR("frame %d, "
 427                                         "bytesused=%d, skipping\n",
 428                                         i, fb->v4lbuf.bytesused));
 429                                 fb->v4lbuf.bytesused = 0;
 430                                 fill = fb->buffer;
 431                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 432                                 if (list_is_singular(&dev->sio_avail)) {
 433                                         /* Always reuse the last buffer */
 434                                         fb->v4lbuf.bytesused = 0;
 435                                         fill = fb->buffer;
 436                                 } else {
 437                                         list_move_tail(dev->sio_avail.next,
 438                                                 &dev->sio_full);
 439                                         wake_up(&dev->wait_frame);
 440                                         fb = list_first_entry(&dev->sio_avail,
 441                                                 struct stk_sio_buffer, list);
 442                                         fb->v4lbuf.bytesused = 0;
 443                                         fill = fb->buffer;
 444                                 }
 445                         }
 446                 } else {
 447                         framelen -= 4;
 448                         iso_buf += 4;
 449                 }
 450
 451                 /* Our buffer is full !!! */
 452                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 453                         (void) (printk_ratelimit() &&
 454                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 455                         /*FIXME Do something here? */
 456                         continue;
 457                 }
 458                 spin_unlock_irqrestore(&dev->spinlock, flags);
 459                 memcpy(fill, iso_buf, framelen);
 460                 spin_lock_irqsave(&dev->spinlock, flags);
 461                 fill += framelen;
 462
 463                 /* New size of our buffer */
 464                 fb->v4lbuf.bytesused += framelen;
 465         }
 466
 467 resubmit:
 468         spin_unlock_irqrestore(&dev->spinlock, flags);
 469         urb->dev = dev->udev;
 470         ret = usb_submit_urb(urb, GFP_ATOMIC);
 471         if (ret != 0) {
 472                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 473                         ret);
 474         }
 475 }
 476
 477 /* -------------------------------------------- */
 478
 479 static int stk_prepare_iso(struct stk_camera *dev)
 480 {
 481         void *kbuf;
 482         int i, j;
 483         struct urb *urb;
 484         struct usb_device *udev;
 485
 486         if (dev == NULL)
 487                 return -ENXIO;
 488         udev = dev->udev;
 489
 490         if (dev->isobufs)
 491                 STK_ERROR("isobufs already allocated. Bad\n");
 492         else
 493                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
 494                                         GFP_KERNEL);
 495         if (dev->isobufs == NULL) {
 496                 STK_ERROR("Unable to allocate iso buffers\n");
 497                 return -ENOMEM;
 498         }
 499         for (i = 0; i < MAX_ISO_BUFS; i++) {
 500                 if (dev->isobufs[i].data == NULL) {
 501                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 502                         if (kbuf == NULL) {
 503                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 504                                         i);
 505                                 goto isobufs_out;
 506                         }
 507                         dev->isobufs[i].data = kbuf;
 508                 } else
 509                         STK_ERROR("isobuf data already allocated\n");
 510                 if (dev->isobufs[i].urb == NULL) {
 511                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 512                         if (urb == NULL) {
 513                                 STK_ERROR("Failed to allocate URB %d\n", i);
 514                                 goto isobufs_out;
 515                         }
 516                         dev->isobufs[i].urb = urb;
 517                 } else {
 518                         STK_ERROR("Killing URB\n");
 519                         usb_kill_urb(dev->isobufs[i].urb);
 520                         urb = dev->isobufs[i].urb;
 521                 }
 522                 urb->interval = 1;
 523                 urb->dev = udev;
 524                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 525                 urb->transfer_flags = URB_ISO_ASAP;
 526                 urb->transfer_buffer = dev->isobufs[i].data;
 527                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 528                 urb->complete = stk_isoc_handler;
 529                 urb->context = dev;
 530                 urb->start_frame = 0;
 531                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 532
 533                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 534                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 535                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 536                 }
 537         }
 538         set_memallocd(dev);
 539         return 0;
 540
 541 isobufs_out:
 542         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 543                 kfree(dev->isobufs[i].data);
 544         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 545                 usb_free_urb(dev->isobufs[i].urb);
 546         kfree(dev->isobufs);
 547         dev->isobufs = NULL;
 548         return -ENOMEM;
 549 }
 550
 551 static void stk_clean_iso(struct stk_camera *dev)
 552 {
 553         int i;
 554
 555         if (dev == NULL || dev->isobufs == NULL)
 556                 return;
 557
 558         for (i = 0; i < MAX_ISO_BUFS; i++) {
 559                 struct urb *urb;
 560
 561                 urb = dev->isobufs[i].urb;
 562                 if (urb) {
 563                         if (atomic_read(&dev->urbs_used) && is_present(dev))
 564                                 usb_kill_urb(urb);
 565                         usb_free_urb(urb);
 566                 }
 567                 kfree(dev->isobufs[i].data);
 568         }
 569         kfree(dev->isobufs);
 570         dev->isobufs = NULL;
 571         unset_memallocd(dev);
 572 }
 573
 574 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 575 {
 576         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 577         INIT_LIST_HEAD(&buf->list);
 578         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 579         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 580         if (buf->buffer == NULL)
 581                 return -ENOMEM;
 582         buf->mapcount = 0;
 583         buf->dev = dev;
 584         buf->v4lbuf.index = index;
 585         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 586         buf->v4lbuf.field = V4L2_FIELD_NONE;
 587         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 588         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 589         return 0;
 590 }
 591
 592 static int stk_free_sio_buffers(struct stk_camera *dev)
 593 {
 594         int i;
 595         int nbufs;
 596         unsigned long flags;
 597         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 598                 return 0;
 599         /*
 600         * If any buffers are mapped, we cannot free them at all.
 601         */
 602         for (i = 0; i < dev->n_sbufs; i++) {
 603                 if (dev->sio_bufs[i].mapcount > 0)
 604                         return -EBUSY;
 605         }
 606         /*
 607         * OK, let's do it.
 608         */
 609         spin_lock_irqsave(&dev->spinlock, flags);
 610         INIT_LIST_HEAD(&dev->sio_avail);
 611         INIT_LIST_HEAD(&dev->sio_full);
 612         nbufs = dev->n_sbufs;
 613         dev->n_sbufs = 0;
 614         spin_unlock_irqrestore(&dev->spinlock, flags);
 615         for (i = 0; i < nbufs; i++) {
 616                 if (dev->sio_bufs[i].buffer != NULL)
 617                         vfree(dev->sio_bufs[i].buffer);
 618         }
 619         kfree(dev->sio_bufs);
 620         dev->sio_bufs = NULL;
 621         return 0;
 622 }
 623
 624 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 625 {
 626         int i;
 627         if (dev->sio_bufs != NULL)
 628                 STK_ERROR("sio_bufs already allocated\n");
 629         else {
 630                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 631                                 GFP_KERNEL);
 632                 if (dev->sio_bufs == NULL)
 633                         return -ENOMEM;
 634                 for (i = 0; i < n_sbufs; i++) {
 635                         if (stk_setup_siobuf(dev, i))
 636                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
 637                         dev->n_sbufs = i+1;
 638                 }
 639         }
 640         return 0;
 641 }
 642
 643 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 644 {
 645         int err;
 646         err = stk_prepare_iso(dev);
 647         if (err) {
 648                 stk_clean_iso(dev);
 649                 return err;
 650         }
 651         err = stk_prepare_sio_buffers(dev, n_sbufs);
 652         if (err) {
 653                 stk_free_sio_buffers(dev);
 654                 return err;
 655         }
 656         return 0;
 657 }
 658
 659 static void stk_free_buffers(struct stk_camera *dev)
 660 {
 661         stk_clean_iso(dev);
 662         stk_free_sio_buffers(dev);
 663 }
 664 /* -------------------------------------------- */
 665
 666 /* v4l file operations */
 667
 668 static int v4l_stk_open(struct file *fp)
 669 {
 670         struct stk_camera *dev;
 671         struct video_device *vdev;
 672
 673         vdev = video_devdata(fp);
 674         dev = vdev_to_camera(vdev);
 675
 676         lock_kernel();
 677         if (dev == NULL || !is_present(dev)) {
 678                 unlock_kernel();
 679                 return -ENXIO;
 680         }
 681         fp->private_data = dev;
 682         usb_autopm_get_interface(dev->interface);
 683         unlock_kernel();
 684
 685         return 0;
 686 }
 687
 688 static int v4l_stk_release(struct file *fp)
 689 {
 690         struct stk_camera *dev = fp->private_data;
 691
 692         if (dev->owner == fp) {
 693                 stk_stop_stream(dev);
 694                 stk_free_buffers(dev);
 695                 dev->owner = NULL;
 696         }
 697
 698         if(is_present(dev))
 699                 usb_autopm_put_interface(dev->interface);
 700
 701         return 0;
 702 }
 703
 704 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 705                 size_t count, loff_t *f_pos)
 706 {
 707         int i;
 708         int ret;
 709         unsigned long flags;
 710         struct stk_sio_buffer *sbuf;
 711         struct stk_camera *dev = fp->private_data;
 712
 713         if (!is_present(dev))
 714                 return -EIO;
 715         if (dev->owner && dev->owner != fp)
 716                 return -EBUSY;
 717         dev->owner = fp;
 718         if (!is_streaming(dev)) {
 719                 if (stk_initialise(dev)
 720                         || stk_allocate_buffers(dev, 3)
 721                         || stk_start_stream(dev))
 722                         return -ENOMEM;
 723                 spin_lock_irqsave(&dev->spinlock, flags);
 724                 for (i = 0; i < dev->n_sbufs; i++) {
 725                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 726                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 727                 }
 728                 spin_unlock_irqrestore(&dev->spinlock, flags);
 729         }
 730         if (*f_pos == 0) {
 731                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 732                         return -EWOULDBLOCK;
 733                 ret = wait_event_interruptible(dev->wait_frame,
 734                         !list_empty(&dev->sio_full) || !is_present(dev));
 735                 if (ret)
 736                         return ret;
 737                 if (!is_present(dev))
 738                         return -EIO;
 739         }
 740         if (count + *f_pos > dev->frame_size)
 741                 count = dev->frame_size - *f_pos;
 742         spin_lock_irqsave(&dev->spinlock, flags);
 743         if (list_empty(&dev->sio_full)) {
 744                 spin_unlock_irqrestore(&dev->spinlock, flags);
 745                 STK_ERROR("BUG: No siobufs ready\n");
 746                 return 0;
 747         }
 748         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 749         spin_unlock_irqrestore(&dev->spinlock, flags);
 750
 751         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 752                 return -EFAULT;
 753
 754         *f_pos += count;
 755
 756         if (*f_pos >= dev->frame_size) {
 757                 *f_pos = 0;
 758                 spin_lock_irqsave(&dev->spinlock, flags);
 759                 list_move_tail(&sbuf->list, &dev->sio_avail);
 760                 spin_unlock_irqrestore(&dev->spinlock, flags);
 761         }
 762         return count;
 763 }
 764
 765 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 766 {
 767         struct stk_camera *dev = fp->private_data;
 768
 769         poll_wait(fp, &dev->wait_frame, wait);
 770
 771         if (!is_present(dev))
 772                 return POLLERR;
 773
 774         if (!list_empty(&dev->sio_full))
 775                 return (POLLIN | POLLRDNORM);
 776
 777         return 0;
 778 }
 779
 780
 781 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 782 {
 783         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 784         sbuf->mapcount++;
 785 }
 786 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 787 {
 788         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 789         sbuf->mapcount--;
 790         if (sbuf->mapcount == 0)
 791                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 792 }
 793 static struct vm_operations_struct stk_v4l_vm_ops = {
 794         .open = stk_v4l_vm_open,
 795         .close = stk_v4l_vm_close
 796 };
 797
 798 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 799 {
 800         unsigned int i;
 801         int ret;
 802         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 803         struct stk_camera *dev = fp->private_data;
 804         struct stk_sio_buffer *sbuf = NULL;
 805
 806         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 807                 return -EINVAL;
 808
 809         for (i = 0; i < dev->n_sbufs; i++) {
 810                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 811                         sbuf = dev->sio_bufs + i;
 812                         break;
 813                 }
 814         }
 815         if (sbuf == NULL)
 816                 return -EINVAL;
 817         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 818         if (ret)
 819                 return ret;
 820         vma->vm_flags |= VM_DONTEXPAND;
 821         vma->vm_private_data = sbuf;
 822         vma->vm_ops = &stk_v4l_vm_ops;
 823         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 824         stk_v4l_vm_open(vma);
 825         return 0;
 826 }
 827
 828 /* v4l ioctl handlers */
 829
 830 static int stk_vidioc_querycap(struct file *filp,
 831                 void *priv, struct v4l2_capability *cap)
 832 {
 833         strcpy(cap->driver, "stk");
 834         strcpy(cap->card, "stk");
 835         cap->version = DRIVER_VERSION_NUM;
 836
 837         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 838                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 839         return 0;
 840 }
 841
 842 static int stk_vidioc_enum_input(struct file *filp,
 843                 void *priv, struct v4l2_input *input)
 844 {
 845         if (input->index != 0)
 846                 return -EINVAL;
 847
 848         strcpy(input->name, "Syntek USB Camera");
 849         input->type = V4L2_INPUT_TYPE_CAMERA;
 850         return 0;
 851 }
 852
 853
 854 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 855 {
 856         *i = 0;
 857         return 0;
 858 }
 859
 860 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 861 {
 862         if (i != 0)
 863                 return -EINVAL;
 864         else
 865                 return 0;
 866 }
 867
 868 /* from vivi.c */
 869 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 870 {
 871         return 0;
 872 }
 873
 874 /* List of all V4Lv2 controls supported by the driver */
 875 static struct v4l2_queryctrl stk_controls[] = {
 876         {
 877                 .id      = V4L2_CID_BRIGHTNESS,
 878                 .type    = V4L2_CTRL_TYPE_INTEGER,
 879                 .name    = "Brightness",
 880                 .minimum = 0,
 881                 .maximum = 0xffff,
 882                 .step    = 0x0100,
 883                 .default_value = 0x6000,
 884         },
 885         /*TODO: get more controls to work */
 886 };
 887
 888 static int stk_vidioc_queryctrl(struct file *filp,
 889                 void *priv, struct v4l2_queryctrl *c)
 890 {
 891         int i;
 892         int nbr;
 893         nbr = ARRAY_SIZE(stk_controls);
 894
 895         for (i = 0; i < nbr; i++) {
 896                 if (stk_controls[i].id == c->id) {
 897                         memcpy(c, &stk_controls[i],
 898                                 sizeof(struct v4l2_queryctrl));
 899                         return 0;
 900                 }
 901         }
 902         return -EINVAL;
 903 }
 904
 905 static int stk_vidioc_g_ctrl(struct file *filp,
 906                 void *priv, struct v4l2_control *c)
 907 {
 908         struct stk_camera *dev = priv;
 909         switch (c->id) {
 910         case V4L2_CID_BRIGHTNESS:
 911                 c->value = dev->vsettings.brightness;
 912                 break;
 913         default:
 914                 return -EINVAL;
 915         }
 916         return 0;
 917 }
 918
 919 static int stk_vidioc_s_ctrl(struct file *filp,
 920                 void *priv, struct v4l2_control *c)
 921 {
 922         struct stk_camera *dev = priv;
 923         switch (c->id) {
 924         case V4L2_CID_BRIGHTNESS:
 925                 dev->vsettings.brightness = c->value;
 926                 return stk_sensor_set_brightness(dev, c->value >> 8);
 927         default:
 928                 return -EINVAL;
 929         }
 930         return 0;
 931 }
 932
 933
 934 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 935                 void *priv, struct v4l2_fmtdesc *fmtd)
 936 {
 937         switch (fmtd->index) {
 938         case 0:
 939                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 940                 strcpy(fmtd->description, "r5g6b5");
 941                 break;
 942         case 1:
 943                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 944                 strcpy(fmtd->description, "r5g6b5BE");
 945                 break;
 946         case 2:
 947                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 948                 strcpy(fmtd->description, "yuv4:2:2");
 949                 break;
 950         case 3:
 951                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 952                 strcpy(fmtd->description, "Raw bayer");
 953                 break;
 954         case 4:
 955                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 956                 strcpy(fmtd->description, "yuv4:2:2");
 957                 break;
 958         default:
 959                 return -EINVAL;
 960         }
 961         return 0;
 962 }
 963
 964 static struct stk_size {
 965         unsigned w;
 966         unsigned h;
 967         enum stk_mode m;
 968 } stk_sizes[] = {
 969         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 970         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 971         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 972         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 973         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 974 };
 975
 976 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 977                 void *priv, struct v4l2_format *f)
 978 {
 979         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 980         struct stk_camera *dev = priv;
 981         int i;
 982
 983         for (i = 0; i < ARRAY_SIZE(stk_sizes)
 984                         && stk_sizes[i].m != dev->vsettings.mode;
 985                 i++);
 986         if (i == ARRAY_SIZE(stk_sizes)) {
 987                 STK_ERROR("ERROR: mode invalid\n");
 988                 return -EINVAL;
 989         }
 990         pix_format->width = stk_sizes[i].w;
 991         pix_format->height = stk_sizes[i].h;
 992         pix_format->field = V4L2_FIELD_NONE;
 993         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 994         pix_format->pixelformat = dev->vsettings.palette;
 995         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 996                 pix_format->bytesperline = pix_format->width;
 997         else
 998                 pix_format->bytesperline = 2 * pix_format->width;
 999         pix_format->sizeimage = pix_format->bytesperline
1000                                 * pix_format->height;
1001         return 0;
1002 }
1003
1004 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1005                 void *priv, struct v4l2_format *fmtd)
1006 {
1007         int i;
1008         switch (fmtd->fmt.pix.pixelformat) {
1009         case V4L2_PIX_FMT_RGB565:
1010         case V4L2_PIX_FMT_RGB565X:
1011         case V4L2_PIX_FMT_UYVY:
1012         case V4L2_PIX_FMT_YUYV:
1013         case V4L2_PIX_FMT_SBGGR8:
1014                 break;
1015         default:
1016                 return -EINVAL;
1017         }
1018         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1019                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1020                         break;
1021         }
1022         if (i == ARRAY_SIZE(stk_sizes)
1023                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1024                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1025                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1026                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1027                 fmtd->fmt.pix.priv = i - 1;
1028         } else {
1029                 fmtd->fmt.pix.height = stk_sizes[i].h;
1030                 fmtd->fmt.pix.width = stk_sizes[i].w;
1031                 fmtd->fmt.pix.priv = i;
1032         }
1033
1034         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1035         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1036         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1037                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1038         else
1039                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1040         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1041                 * fmtd->fmt.pix.height;
1042         return 0;
1043 }
1044
1045 static int stk_setup_format(struct stk_camera *dev)
1046 {
1047         int i = 0;
1048         int depth;
1049         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1050                 depth = 1;
1051         else
1052                 depth = 2;
1053         while (i < ARRAY_SIZE(stk_sizes) &&
1054                         stk_sizes[i].m != dev->vsettings.mode)
1055                 i++;
1056         if (i == ARRAY_SIZE(stk_sizes)) {
1057                 STK_ERROR("Something is broken in %s\n", __func__);
1058                 return -EFAULT;
1059         }
1060         /* This registers controls some timings, not sure of what. */
1061         stk_camera_write_reg(dev, 0x001b, 0x0e);
1062         if (dev->vsettings.mode == MODE_SXGA)
1063                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1064         else
1065                 stk_camera_write_reg(dev, 0x001c, 0x46);
1066         /*
1067          * Registers 0x0115 0x0114 are the size of each line (bytes),
1068          * regs 0x0117 0x0116 are the heigth of the image.
1069          */
1070         stk_camera_write_reg(dev, 0x0115,
1071                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1072         stk_camera_write_reg(dev, 0x0114,
1073                 (stk_sizes[i].w * depth) & 0xff);
1074         stk_camera_write_reg(dev, 0x0117,
1075                 (stk_sizes[i].h >> 8) & 0xff);
1076         stk_camera_write_reg(dev, 0x0116,
1077                 stk_sizes[i].h & 0xff);
1078         return stk_sensor_configure(dev);
1079 }
1080
1081 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1082                 void *priv, struct v4l2_format *fmtd)
1083 {
1084         int ret;
1085         struct stk_camera *dev = priv;
1086
1087         if (dev == NULL)
1088                 return -ENODEV;
1089         if (!is_present(dev))
1090                 return -ENODEV;
1091         if (is_streaming(dev))
1092                 return -EBUSY;
1093         if (dev->owner && dev->owner != filp)
1094                 return -EBUSY;
1095         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1096         if (ret)
1097                 return ret;
1098         dev->owner = filp;
1099
1100         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1101         stk_free_buffers(dev);
1102         dev->frame_size = fmtd->fmt.pix.sizeimage;
1103         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1104
1105         stk_initialise(dev);
1106         return stk_setup_format(dev);
1107 }
1108
1109 static int stk_vidioc_reqbufs(struct file *filp,
1110                 void *priv, struct v4l2_requestbuffers *rb)
1111 {
1112         struct stk_camera *dev = priv;
1113
1114         if (dev == NULL)
1115                 return -ENODEV;
1116         if (rb->memory != V4L2_MEMORY_MMAP)
1117                 return -EINVAL;
1118         if (is_streaming(dev)
1119                 || (dev->owner && dev->owner != filp))
1120                 return -EBUSY;
1121         dev->owner = filp;
1122
1123         /*FIXME If they ask for zero, we must stop streaming and free */
1124         if (rb->count < 3)
1125                 rb->count = 3;
1126         /* Arbitrary limit */
1127         else if (rb->count > 5)
1128                 rb->count = 5;
1129
1130         stk_allocate_buffers(dev, rb->count);
1131         rb->count = dev->n_sbufs;
1132         return 0;
1133 }
1134
1135 static int stk_vidioc_querybuf(struct file *filp,
1136                 void *priv, struct v4l2_buffer *buf)
1137 {
1138         struct stk_camera *dev = priv;
1139         struct stk_sio_buffer *sbuf;
1140
1141         if (buf->index >= dev->n_sbufs)
1142                 return -EINVAL;
1143         sbuf = dev->sio_bufs + buf->index;
1144         *buf = sbuf->v4lbuf;
1145         return 0;
1146 }
1147
1148 static int stk_vidioc_qbuf(struct file *filp,
1149                 void *priv, struct v4l2_buffer *buf)
1150 {
1151         struct stk_camera *dev = priv;
1152         struct stk_sio_buffer *sbuf;
1153         unsigned long flags;
1154
1155         if (buf->memory != V4L2_MEMORY_MMAP)
1156                 return -EINVAL;
1157
1158         if (buf->index >= dev->n_sbufs)
1159                 return -EINVAL;
1160         sbuf = dev->sio_bufs + buf->index;
1161         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1162                 return 0;
1163         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1164         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1165         spin_lock_irqsave(&dev->spinlock, flags);
1166         list_add_tail(&sbuf->list, &dev->sio_avail);
1167         *buf = sbuf->v4lbuf;
1168         spin_unlock_irqrestore(&dev->spinlock, flags);
1169         return 0;
1170 }
1171
1172 static int stk_vidioc_dqbuf(struct file *filp,
1173                 void *priv, struct v4l2_buffer *buf)
1174 {
1175         struct stk_camera *dev = priv;
1176         struct stk_sio_buffer *sbuf;
1177         unsigned long flags;
1178         int ret;
1179
1180         if (!is_streaming(dev))
1181                 return -EINVAL;
1182
1183         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1184                 return -EWOULDBLOCK;
1185         ret = wait_event_interruptible(dev->wait_frame,
1186                 !list_empty(&dev->sio_full) || !is_present(dev));
1187         if (ret)
1188                 return ret;
1189         if (!is_present(dev))
1190                 return -EIO;
1191
1192         spin_lock_irqsave(&dev->spinlock, flags);
1193         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1194         list_del_init(&sbuf->list);
1195         spin_unlock_irqrestore(&dev->spinlock, flags);
1196         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1197         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1198         sbuf->v4lbuf.sequence = ++dev->sequence;
1199         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1200
1201         *buf = sbuf->v4lbuf;
1202         return 0;
1203 }
1204
1205 static int stk_vidioc_streamon(struct file *filp,
1206                 void *priv, enum v4l2_buf_type type)
1207 {
1208         struct stk_camera *dev = priv;
1209         if (is_streaming(dev))
1210                 return 0;
1211         if (dev->sio_bufs == NULL)
1212                 return -EINVAL;
1213         dev->sequence = 0;
1214         return stk_start_stream(dev);
1215 }
1216
1217 static int stk_vidioc_streamoff(struct file *filp,
1218                 void *priv, enum v4l2_buf_type type)
1219 {
1220         struct stk_camera *dev = priv;
1221         unsigned long flags;
1222         int i;
1223         stk_stop_stream(dev);
1224         spin_lock_irqsave(&dev->spinlock, flags);
1225         INIT_LIST_HEAD(&dev->sio_avail);
1226         INIT_LIST_HEAD(&dev->sio_full);
1227         for (i = 0; i < dev->n_sbufs; i++) {
1228                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1229                 dev->sio_bufs[i].v4lbuf.flags = 0;
1230         }
1231         spin_unlock_irqrestore(&dev->spinlock, flags);
1232         return 0;
1233 }
1234
1235
1236 static int stk_vidioc_g_parm(struct file *filp,
1237                 void *priv, struct v4l2_streamparm *sp)
1238 {
1239         /*FIXME This is not correct */
1240         sp->parm.capture.timeperframe.numerator = 1;
1241         sp->parm.capture.timeperframe.denominator = 30;
1242         sp->parm.capture.readbuffers = 2;
1243         return 0;
1244 }
1245
1246 static int stk_vidioc_enum_framesizes(struct file *filp,
1247                 void *priv, struct v4l2_frmsizeenum *frms)
1248 {
1249         if (frms->index >= ARRAY_SIZE(stk_sizes))
1250                 return -EINVAL;
1251         switch (frms->pixel_format) {
1252         case V4L2_PIX_FMT_RGB565:
1253         case V4L2_PIX_FMT_RGB565X:
1254         case V4L2_PIX_FMT_UYVY:
1255         case V4L2_PIX_FMT_YUYV:
1256         case V4L2_PIX_FMT_SBGGR8:
1257                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1258                 frms->discrete.width = stk_sizes[frms->index].w;
1259                 frms->discrete.height = stk_sizes[frms->index].h;
1260                 return 0;
1261         default: return -EINVAL;
1262         }
1263 }
1264
1265 static struct v4l2_file_operations v4l_stk_fops = {
1266         .owner = THIS_MODULE,
1267         .open = v4l_stk_open,
1268         .release = v4l_stk_release,
1269         .read = v4l_stk_read,
1270         .poll = v4l_stk_poll,
1271         .mmap = v4l_stk_mmap,
1272         .ioctl = video_ioctl2,
1273 };
1274
1275 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1276         .vidioc_querycap = stk_vidioc_querycap,
1277         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1278         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1279         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1280         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1281         .vidioc_enum_input = stk_vidioc_enum_input,
1282         .vidioc_s_input = stk_vidioc_s_input,
1283         .vidioc_g_input = stk_vidioc_g_input,
1284         .vidioc_s_std = stk_vidioc_s_std,
1285         .vidioc_reqbufs = stk_vidioc_reqbufs,
1286         .vidioc_querybuf = stk_vidioc_querybuf,
1287         .vidioc_qbuf = stk_vidioc_qbuf,
1288         .vidioc_dqbuf = stk_vidioc_dqbuf,
1289         .vidioc_streamon = stk_vidioc_streamon,
1290         .vidioc_streamoff = stk_vidioc_streamoff,
1291         .vidioc_queryctrl = stk_vidioc_queryctrl,
1292         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1293         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1294         .vidioc_g_parm = stk_vidioc_g_parm,
1295         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1296 };
1297
1298 static void stk_v4l_dev_release(struct video_device *vd)
1299 {
1300         struct stk_camera *dev = vdev_to_camera(vd);
1301
1302         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1303                 STK_ERROR("We are leaking memory\n");
1304         usb_put_intf(dev->interface);
1305         kfree(dev);
1306 }
1307
1308 static struct video_device stk_v4l_data = {
1309         .name = "stkwebcam",
1310         .minor = -1,
1311         .tvnorms = V4L2_STD_UNKNOWN,
1312         .current_norm = V4L2_STD_UNKNOWN,
1313         .fops = &v4l_stk_fops,
1314         .ioctl_ops = &v4l_stk_ioctl_ops,
1315         .release = stk_v4l_dev_release,
1316 };
1317
1318
1319 static int stk_register_video_device(struct stk_camera *dev)
1320 {
1321         int err;
1322
1323         dev->vdev = stk_v4l_data;
1324         dev->vdev.debug = debug;
1325         dev->vdev.parent = &dev->interface->dev;
1326         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1327         if (err)
1328                 STK_ERROR("v4l registration failed\n");
1329         else
1330                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1331                         " /dev/video%d\n", dev->vdev.num);
1332         return err;
1333 }
1334
1335
1336 /* USB Stuff */
1337
1338 static int stk_camera_probe(struct usb_interface *interface,
1339                 const struct usb_device_id *id)
1340 {
1341         int i;
1342         int err = 0;
1343
1344         struct stk_camera *dev = NULL;
1345         struct usb_device *udev = interface_to_usbdev(interface);
1346         struct usb_host_interface *iface_desc;
1347         struct usb_endpoint_descriptor *endpoint;
1348
1349         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1350         if (dev == NULL) {
1351                 STK_ERROR("Out of memory !\n");
1352                 return -ENOMEM;
1353         }
1354
1355         spin_lock_init(&dev->spinlock);
1356         init_waitqueue_head(&dev->wait_frame);
1357
1358         dev->udev = udev;
1359         dev->interface = interface;
1360         usb_get_intf(interface);
1361
1362         dev->vsettings.vflip = vflip;
1363         dev->vsettings.hflip = hflip;
1364         dev->n_sbufs = 0;
1365         set_present(dev);
1366
1367         /* Set up the endpoint information
1368          * use only the first isoc-in endpoint
1369          * for the current alternate setting */
1370         iface_desc = interface->cur_altsetting;
1371
1372         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1373                 endpoint = &iface_desc->endpoint[i].desc;
1374
1375                 if (!dev->isoc_ep
1376                         && usb_endpoint_is_isoc_in(endpoint)) {
1377                         /* we found an isoc in endpoint */
1378                         dev->isoc_ep = usb_endpoint_num(endpoint);
1379                         break;
1380                 }
1381         }
1382         if (!dev->isoc_ep) {
1383                 STK_ERROR("Could not find isoc-in endpoint");
1384                 err = -ENODEV;
1385                 goto error;
1386         }
1387         dev->vsettings.brightness = 0x7fff;
1388         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1389         dev->vsettings.mode = MODE_VGA;
1390         dev->frame_size = 640 * 480 * 2;
1391
1392         INIT_LIST_HEAD(&dev->sio_avail);
1393         INIT_LIST_HEAD(&dev->sio_full);
1394
1395         usb_set_intfdata(interface, dev);
1396
1397         err = stk_register_video_device(dev);
1398         if (err) {
1399                 goto error;
1400         }
1401
1402         stk_create_sysfs_files(&dev->vdev);
1403         usb_autopm_enable(dev->interface);
1404
1405         return 0;
1406
1407 error:
1408         kfree(dev);
1409         return err;
1410 }
1411
1412 static void stk_camera_disconnect(struct usb_interface *interface)
1413 {
1414         struct stk_camera *dev = usb_get_intfdata(interface);
1415
1416         usb_set_intfdata(interface, NULL);
1417         unset_present(dev);
1418
1419         wake_up_interruptible(&dev->wait_frame);
1420         stk_remove_sysfs_files(&dev->vdev);
1421
1422         STK_INFO("Syntek USB2.0 Camera release resources "
1423                 "video device /dev/video%d\n", dev->vdev.num);
1424
1425         video_unregister_device(&dev->vdev);
1426 }
1427
1428 #ifdef CONFIG_PM
1429 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1430 {
1431         struct stk_camera *dev = usb_get_intfdata(intf);
1432         if (is_streaming(dev)) {
1433                 stk_stop_stream(dev);
1434                 /* yes, this is ugly */
1435                 set_streaming(dev);
1436         }
1437         return 0;
1438 }
1439
1440 static int stk_camera_resume(struct usb_interface *intf)
1441 {
1442         struct stk_camera *dev = usb_get_intfdata(intf);
1443         if (!is_initialised(dev))
1444                 return 0;
1445         unset_initialised(dev);
1446         stk_initialise(dev);
1447         stk_setup_format(dev);
1448         if (is_streaming(dev))
1449                 stk_start_stream(dev);
1450         return 0;
1451 }
1452 #endif
1453
1454 static struct usb_driver stk_camera_driver = {
1455         .name = "stkwebcam",
1456         .probe = stk_camera_probe,
1457         .disconnect = stk_camera_disconnect,
1458         .id_table = stkwebcam_table,
1459 #ifdef CONFIG_PM
1460         .suspend = stk_camera_suspend,
1461         .resume = stk_camera_resume,
1462 #endif
1463 };
1464
1465
1466 static int __init stk_camera_init(void)
1467 {
1468         int result;
1469
1470         result = usb_register(&stk_camera_driver);
1471         if (result)
1472                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1473
1474
1475         return result;
1476 }
1477
1478 static void __exit stk_camera_exit(void)
1479 {
1480         usb_deregister(&stk_camera_driver);
1481 }
1482
1483 module_init(stk_camera_init);
1484 module_exit(stk_camera_exit);
1485
1486