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/kref.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 static void stk_camera_cleanup(struct kref *kref)
  69 {
  70         struct stk_camera *dev = to_stk_camera(kref);
  71
  72         STK_INFO("Syntek USB2.0 Camera release resources"
  73                 " video device /dev/video%d\n", dev->vdev.minor);
  74         video_unregister_device(&dev->vdev);
  75         video_set_drvdata(&dev->vdev, NULL);
  76
  77         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
  78                 STK_ERROR("We are leaking memory\n");
  79         usb_put_intf(dev->interface);
  80         kfree(dev);
  81 }
  82
  83
  84 /*
  85  * Basic stuff
  86  */
  87 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
  88 {
  89         struct usb_device *udev = dev->udev;
  90         int ret;
  91
  92         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  93                         0x01,
  94                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  95                         value,
  96                         index,
  97                         NULL,
  98                         0,
  99                         500);
 100         if (ret < 0)
 101                 return ret;
 102         else
 103                 return 0;
 104 }
 105
 106 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
 107 {
 108         struct usb_device *udev = dev->udev;
 109         int ret;
 110
 111         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 112                         0x00,
 113                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 114                         0x00,
 115                         index,
 116                         (u8 *) value,
 117                         sizeof(u8),
 118                         500);
 119         if (ret < 0)
 120                 return ret;
 121         else
 122                 return 0;
 123 }
 124
 125 static int stk_start_stream(struct stk_camera *dev)
 126 {
 127         int value;
 128         int i, ret;
 129         int value_116, value_117;
 130
 131         if (!is_present(dev))
 132                 return -ENODEV;
 133         if (!is_memallocd(dev) || !is_initialised(dev)) {
 134                 STK_ERROR("FIXME: Buffers are not allocated\n");
 135                 return -EFAULT;
 136         }
 137         ret = usb_set_interface(dev->udev, 0, 5);
 138
 139         if (ret < 0)
 140                 STK_ERROR("usb_set_interface failed !\n");
 141         if (stk_sensor_wakeup(dev))
 142                 STK_ERROR("error awaking the sensor\n");
 143
 144         stk_camera_read_reg(dev, 0x0116, &value_116);
 145         stk_camera_read_reg(dev, 0x0117, &value_117);
 146
 147         stk_camera_write_reg(dev, 0x0116, 0x0000);
 148         stk_camera_write_reg(dev, 0x0117, 0x0000);
 149
 150         stk_camera_read_reg(dev, 0x0100, &value);
 151         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 152
 153         stk_camera_write_reg(dev, 0x0116, value_116);
 154         stk_camera_write_reg(dev, 0x0117, value_117);
 155         for (i = 0; i < MAX_ISO_BUFS; i++) {
 156                 if (dev->isobufs[i].urb) {
 157                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 158                         atomic_inc(&dev->urbs_used);
 159                         if (ret)
 160                                 return ret;
 161                 }
 162         }
 163         set_streaming(dev);
 164         return 0;
 165 }
 166
 167 static int stk_stop_stream(struct stk_camera *dev)
 168 {
 169         int value;
 170         int i;
 171         if (is_present(dev)) {
 172                 stk_camera_read_reg(dev, 0x0100, &value);
 173                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 174                 if (dev->isobufs != NULL) {
 175                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 176                                 if (dev->isobufs[i].urb)
 177                                         usb_kill_urb(dev->isobufs[i].urb);
 178                         }
 179                 }
 180                 unset_streaming(dev);
 181
 182                 if (usb_set_interface(dev->udev, 0, 0))
 183                         STK_ERROR("usb_set_interface failed !\n");
 184                 if (stk_sensor_sleep(dev))
 185                         STK_ERROR("error suspending the sensor\n");
 186         }
 187         return 0;
 188 }
 189
 190 /*
 191  * This seems to be the shortest init sequence we
 192  * must do in order to find the sensor
 193  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 194  * is also reset. Maybe powers down it?
 195  * Rest of values don't make a difference
 196  */
 197
 198 static struct regval stk1125_initvals[] = {
 199         /*TODO: What means this sequence? */
 200         {0x0000, 0x24},
 201         {0x0100, 0x21},
 202         {0x0002, 0x68},
 203         {0x0003, 0x80},
 204         {0x0005, 0x00},
 205         {0x0007, 0x03},
 206         {0x000d, 0x00},
 207         {0x000f, 0x02},
 208         {0x0300, 0x12},
 209         {0x0350, 0x41},
 210         {0x0351, 0x00},
 211         {0x0352, 0x00},
 212         {0x0353, 0x00},
 213         {0x0018, 0x10},
 214         {0x0019, 0x00},
 215         {0x001b, 0x0e},
 216         {0x001c, 0x46},
 217         {0x0300, 0x80},
 218         {0x001a, 0x04},
 219         {0x0110, 0x00},
 220         {0x0111, 0x00},
 221         {0x0112, 0x00},
 222         {0x0113, 0x00},
 223
 224         {0xffff, 0xff},
 225 };
 226
 227
 228 static int stk_initialise(struct stk_camera *dev)
 229 {
 230         struct regval *rv;
 231         int ret;
 232         if (!is_present(dev))
 233                 return -ENODEV;
 234         if (is_initialised(dev))
 235                 return 0;
 236         rv = stk1125_initvals;
 237         while (rv->reg != 0xffff) {
 238                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 239                 if (ret)
 240                         return ret;
 241                 rv++;
 242         }
 243         if (stk_sensor_init(dev) == 0) {
 244                 set_initialised(dev);
 245                 return 0;
 246         } else
 247                 return -1;
 248 }
 249
 250 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 251
 252 /* sysfs functions */
 253 /*FIXME cleanup this */
 254
 255 static ssize_t show_brightness(struct device *class,
 256                         struct device_attribute *attr, char *buf)
 257 {
 258         struct video_device *vdev = to_video_device(class);
 259         struct stk_camera *dev = vdev_to_camera(vdev);
 260
 261         return sprintf(buf, "%X\n", dev->vsettings.brightness);
 262 }
 263
 264 static ssize_t store_brightness(struct device *class,
 265                 struct device_attribute *attr, const char *buf, size_t count)
 266 {
 267         char *endp;
 268         unsigned long value;
 269         int ret;
 270
 271         struct video_device *vdev = to_video_device(class);
 272         struct stk_camera *dev = vdev_to_camera(vdev);
 273
 274         value = simple_strtoul(buf, &endp, 16);
 275
 276         dev->vsettings.brightness = (int) value;
 277
 278         ret = stk_sensor_set_brightness(dev, value >> 8);
 279         if (ret)
 280                 return ret;
 281         else
 282                 return count;
 283 }
 284
 285 static ssize_t show_hflip(struct device *class,
 286                 struct device_attribute *attr, char *buf)
 287 {
 288         struct video_device *vdev = to_video_device(class);
 289         struct stk_camera *dev = vdev_to_camera(vdev);
 290
 291         return sprintf(buf, "%d\n", dev->vsettings.hflip);
 292 }
 293
 294 static ssize_t store_hflip(struct device *class,
 295                 struct device_attribute *attr, const char *buf, size_t count)
 296 {
 297         struct video_device *vdev = to_video_device(class);
 298         struct stk_camera *dev = vdev_to_camera(vdev);
 299
 300         if (strncmp(buf, "1", 1) == 0)
 301                 dev->vsettings.hflip = 1;
 302         else if (strncmp(buf, "0", 1) == 0)
 303                 dev->vsettings.hflip = 0;
 304         else
 305                 return -EINVAL;
 306
 307         return strlen(buf);
 308 }
 309
 310 static ssize_t show_vflip(struct device *class,
 311                 struct device_attribute *attr, char *buf)
 312 {
 313         struct video_device *vdev = to_video_device(class);
 314         struct stk_camera *dev = vdev_to_camera(vdev);
 315
 316         return sprintf(buf, "%d\n", dev->vsettings.vflip);
 317 }
 318
 319 static ssize_t store_vflip(struct device *class,
 320                 struct device_attribute *attr, const char *buf, size_t count)
 321 {
 322         struct video_device *vdev = to_video_device(class);
 323         struct stk_camera *dev = vdev_to_camera(vdev);
 324
 325         if (strncmp(buf, "1", 1) == 0)
 326                 dev->vsettings.vflip = 1;
 327         else if (strncmp(buf, "0", 1) == 0)
 328                 dev->vsettings.vflip = 0;
 329         else
 330                 return -EINVAL;
 331
 332         return strlen(buf);
 333 }
 334
 335 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
 336                         show_brightness, store_brightness);
 337 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
 338 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
 339
 340 static int stk_create_sysfs_files(struct video_device *vdev)
 341 {
 342         int ret;
 343
 344         ret = device_create_file(&vdev->dev, &dev_attr_brightness);
 345         ret += device_create_file(&vdev->dev, &dev_attr_hflip);
 346         ret += device_create_file(&vdev->dev, &dev_attr_vflip);
 347         if (ret)
 348                 STK_WARNING("Could not create sysfs files\n");
 349         return ret;
 350 }
 351
 352 static void stk_remove_sysfs_files(struct video_device *vdev)
 353 {
 354         device_remove_file(&vdev->dev, &dev_attr_brightness);
 355         device_remove_file(&vdev->dev, &dev_attr_hflip);
 356         device_remove_file(&vdev->dev, &dev_attr_vflip);
 357 }
 358
 359 #else
 360 #define stk_create_sysfs_files(a)
 361 #define stk_remove_sysfs_files(a)
 362 #endif
 363
 364 /* *********************************************** */
 365 /*
 366  * This function is called as an URB transfert is complete (Isochronous pipe).
 367  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 368  * and not stall. Neat.
 369  */
 370 static void stk_isoc_handler(struct urb *urb)
 371 {
 372         int i;
 373         int ret;
 374         int framelen;
 375         unsigned long flags;
 376
 377         unsigned char *fill = NULL;
 378         unsigned char *iso_buf = NULL;
 379
 380         struct stk_camera *dev;
 381         struct stk_sio_buffer *fb;
 382
 383         dev = (struct stk_camera *) urb->context;
 384
 385         if (dev == NULL) {
 386                 STK_ERROR("isoc_handler called with NULL device !\n");
 387                 return;
 388         }
 389
 390         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 391                 || urb->status == -ESHUTDOWN) {
 392                 atomic_dec(&dev->urbs_used);
 393                 return;
 394         }
 395
 396         spin_lock_irqsave(&dev->spinlock, flags);
 397
 398         if (urb->status != -EINPROGRESS && urb->status != 0) {
 399                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 400                 goto resubmit;
 401         }
 402
 403         if (list_empty(&dev->sio_avail)) {
 404                 /*FIXME Stop streaming after a while */
 405                 (void) (printk_ratelimit() &&
 406                 STK_ERROR("isoc_handler without available buffer!\n"));
 407                 goto resubmit;
 408         }
 409         fb = list_first_entry(&dev->sio_avail,
 410                         struct stk_sio_buffer, list);
 411         fill = fb->buffer + fb->v4lbuf.bytesused;
 412
 413         for (i = 0; i < urb->number_of_packets; i++) {
 414                 if (urb->iso_frame_desc[i].status != 0) {
 415                         if (urb->iso_frame_desc[i].status != -EXDEV)
 416                                 STK_ERROR("Frame %d has error %d\n", i,
 417                                         urb->iso_frame_desc[i].status);
 418                         continue;
 419                 }
 420                 framelen = urb->iso_frame_desc[i].actual_length;
 421                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 422
 423                 if (framelen <= 4)
 424                         continue; /* no data */
 425
 426                 /*
 427                  * we found something informational from there
 428                  * the isoc frames have to type of headers
 429                  * type1: 00 xx 00 00 or 20 xx 00 00
 430                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 431                  * xx is a sequencer which has never been seen over 0x3f
 432                  * imho data written down looks like bayer, i see similarities
 433                  * after every 640 bytes
 434                  */
 435                 if (*iso_buf & 0x80) {
 436                         framelen -= 8;
 437                         iso_buf += 8;
 438                         /* This marks a new frame */
 439                         if (fb->v4lbuf.bytesused != 0
 440                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 441                                 (void) (printk_ratelimit() &&
 442                                 STK_ERROR("frame %d, "
 443                                         "bytesused=%d, skipping\n",
 444                                         i, fb->v4lbuf.bytesused));
 445                                 fb->v4lbuf.bytesused = 0;
 446                                 fill = fb->buffer;
 447                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 448                                 if (list_is_singular(&dev->sio_avail)) {
 449                                         /* Always reuse the last buffer */
 450                                         fb->v4lbuf.bytesused = 0;
 451                                         fill = fb->buffer;
 452                                 } else {
 453                                         list_move_tail(dev->sio_avail.next,
 454                                                 &dev->sio_full);
 455                                         wake_up(&dev->wait_frame);
 456                                         fb = list_first_entry(&dev->sio_avail,
 457                                                 struct stk_sio_buffer, list);
 458                                         fb->v4lbuf.bytesused = 0;
 459                                         fill = fb->buffer;
 460                                 }
 461                         }
 462                 } else {
 463                         framelen -= 4;
 464                         iso_buf += 4;
 465                 }
 466
 467                 /* Our buffer is full !!! */
 468                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 469                         (void) (printk_ratelimit() &&
 470                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 471                         /*FIXME Do something here? */
 472                         continue;
 473                 }
 474                 spin_unlock_irqrestore(&dev->spinlock, flags);
 475                 memcpy(fill, iso_buf, framelen);
 476                 spin_lock_irqsave(&dev->spinlock, flags);
 477                 fill += framelen;
 478
 479                 /* New size of our buffer */
 480                 fb->v4lbuf.bytesused += framelen;
 481         }
 482
 483 resubmit:
 484         spin_unlock_irqrestore(&dev->spinlock, flags);
 485         urb->dev = dev->udev;
 486         ret = usb_submit_urb(urb, GFP_ATOMIC);
 487         if (ret != 0) {
 488                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 489                         ret);
 490         }
 491 }
 492
 493 /* -------------------------------------------- */
 494
 495 static int stk_prepare_iso(struct stk_camera *dev)
 496 {
 497         void *kbuf;
 498         int i, j;
 499         struct urb *urb;
 500         struct usb_device *udev;
 501
 502         if (dev == NULL)
 503                 return -ENXIO;
 504         udev = dev->udev;
 505
 506         if (dev->isobufs)
 507                 STK_ERROR("isobufs already allocated. Bad\n");
 508         else
 509                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
 510                                         GFP_KERNEL);
 511         if (dev->isobufs == NULL) {
 512                 STK_ERROR("Unable to allocate iso buffers\n");
 513                 return -ENOMEM;
 514         }
 515         for (i = 0; i < MAX_ISO_BUFS; i++) {
 516                 if (dev->isobufs[i].data == NULL) {
 517                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 518                         if (kbuf == NULL) {
 519                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 520                                         i);
 521                                 goto isobufs_out;
 522                         }
 523                         dev->isobufs[i].data = kbuf;
 524                 } else
 525                         STK_ERROR("isobuf data already allocated\n");
 526                 if (dev->isobufs[i].urb == NULL) {
 527                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 528                         if (urb == NULL) {
 529                                 STK_ERROR("Failed to allocate URB %d\n", i);
 530                                 goto isobufs_out;
 531                         }
 532                         dev->isobufs[i].urb = urb;
 533                 } else {
 534                         STK_ERROR("Killing URB\n");
 535                         usb_kill_urb(dev->isobufs[i].urb);
 536                         urb = dev->isobufs[i].urb;
 537                 }
 538                 urb->interval = 1;
 539                 urb->dev = udev;
 540                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 541                 urb->transfer_flags = URB_ISO_ASAP;
 542                 urb->transfer_buffer = dev->isobufs[i].data;
 543                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 544                 urb->complete = stk_isoc_handler;
 545                 urb->context = dev;
 546                 urb->start_frame = 0;
 547                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 548
 549                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 550                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 551                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 552                 }
 553         }
 554         set_memallocd(dev);
 555         return 0;
 556
 557 isobufs_out:
 558         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 559                 kfree(dev->isobufs[i].data);
 560         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 561                 usb_free_urb(dev->isobufs[i].urb);
 562         kfree(dev->isobufs);
 563         dev->isobufs = NULL;
 564         return -ENOMEM;
 565 }
 566
 567 static void stk_clean_iso(struct stk_camera *dev)
 568 {
 569         int i;
 570
 571         if (dev == NULL || dev->isobufs == NULL)
 572                 return;
 573
 574         for (i = 0; i < MAX_ISO_BUFS; i++) {
 575                 struct urb *urb;
 576
 577                 urb = dev->isobufs[i].urb;
 578                 if (urb) {
 579                         if (atomic_read(&dev->urbs_used))
 580                                 usb_kill_urb(urb);
 581                         usb_free_urb(urb);
 582                 }
 583                 kfree(dev->isobufs[i].data);
 584         }
 585         kfree(dev->isobufs);
 586         dev->isobufs = NULL;
 587         unset_memallocd(dev);
 588 }
 589
 590 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 591 {
 592         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 593         INIT_LIST_HEAD(&buf->list);
 594         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 595         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 596         if (buf->buffer == NULL)
 597                 return -ENOMEM;
 598         buf->mapcount = 0;
 599         buf->dev = dev;
 600         buf->v4lbuf.index = index;
 601         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 602         buf->v4lbuf.field = V4L2_FIELD_NONE;
 603         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 604         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 605         return 0;
 606 }
 607
 608 static int stk_free_sio_buffers(struct stk_camera *dev)
 609 {
 610         int i;
 611         int nbufs;
 612         unsigned long flags;
 613         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 614                 return 0;
 615         /*
 616         * If any buffers are mapped, we cannot free them at all.
 617         */
 618         for (i = 0; i < dev->n_sbufs; i++) {
 619                 if (dev->sio_bufs[i].mapcount > 0)
 620                         return -EBUSY;
 621         }
 622         /*
 623         * OK, let's do it.
 624         */
 625         spin_lock_irqsave(&dev->spinlock, flags);
 626         INIT_LIST_HEAD(&dev->sio_avail);
 627         INIT_LIST_HEAD(&dev->sio_full);
 628         nbufs = dev->n_sbufs;
 629         dev->n_sbufs = 0;
 630         spin_unlock_irqrestore(&dev->spinlock, flags);
 631         for (i = 0; i < nbufs; i++) {
 632                 if (dev->sio_bufs[i].buffer != NULL)
 633                         vfree(dev->sio_bufs[i].buffer);
 634         }
 635         kfree(dev->sio_bufs);
 636         dev->sio_bufs = NULL;
 637         return 0;
 638 }
 639
 640 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 641 {
 642         int i;
 643         if (dev->sio_bufs != NULL)
 644                 STK_ERROR("sio_bufs already allocated\n");
 645         else {
 646                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 647                                 GFP_KERNEL);
 648                 if (dev->sio_bufs == NULL)
 649                         return -ENOMEM;
 650                 for (i = 0; i < n_sbufs; i++) {
 651                         if (stk_setup_siobuf(dev, i))
 652                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
 653                         dev->n_sbufs = i+1;
 654                 }
 655         }
 656         return 0;
 657 }
 658
 659 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 660 {
 661         int err;
 662         err = stk_prepare_iso(dev);
 663         if (err) {
 664                 stk_clean_iso(dev);
 665                 return err;
 666         }
 667         err = stk_prepare_sio_buffers(dev, n_sbufs);
 668         if (err) {
 669                 stk_free_sio_buffers(dev);
 670                 return err;
 671         }
 672         return 0;
 673 }
 674
 675 static void stk_free_buffers(struct stk_camera *dev)
 676 {
 677         stk_clean_iso(dev);
 678         stk_free_sio_buffers(dev);
 679 }
 680 /* -------------------------------------------- */
 681
 682 /* v4l file operations */
 683
 684 static int v4l_stk_open(struct inode *inode, struct file *fp)
 685 {
 686         struct stk_camera *dev;
 687         struct video_device *vdev;
 688
 689         vdev = video_devdata(fp);
 690         dev = vdev_to_camera(vdev);
 691
 692         lock_kernel();
 693         if (dev == NULL || !is_present(dev)) {
 694                 unlock_kernel();
 695                 return -ENXIO;
 696         }
 697         fp->private_data = vdev;
 698         kref_get(&dev->kref);
 699         usb_autopm_get_interface(dev->interface);
 700         unlock_kernel();
 701
 702         return 0;
 703 }
 704
 705 static int v4l_stk_release(struct inode *inode, struct file *fp)
 706 {
 707         struct stk_camera *dev;
 708         struct video_device *vdev;
 709
 710         vdev = video_devdata(fp);
 711         if (vdev == NULL) {
 712                 STK_ERROR("v4l_release called w/o video devdata\n");
 713                 return -EFAULT;
 714         }
 715         dev = vdev_to_camera(vdev);
 716         if (dev == NULL) {
 717                 STK_ERROR("v4l_release called on removed device\n");
 718                 return -ENODEV;
 719         }
 720
 721         if (dev->owner != fp) {
 722                 usb_autopm_put_interface(dev->interface);
 723                 kref_put(&dev->kref, stk_camera_cleanup);
 724                 return 0;
 725         }
 726
 727         stk_stop_stream(dev);
 728
 729         stk_free_buffers(dev);
 730
 731         dev->owner = NULL;
 732
 733         usb_autopm_put_interface(dev->interface);
 734         kref_put(&dev->kref, stk_camera_cleanup);
 735
 736         return 0;
 737 }
 738
 739 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 740                 size_t count, loff_t *f_pos)
 741 {
 742         int i;
 743         int ret;
 744         unsigned long flags;
 745         struct stk_camera *dev;
 746         struct video_device *vdev;
 747         struct stk_sio_buffer *sbuf;
 748
 749         vdev = video_devdata(fp);
 750         if (vdev == NULL)
 751                 return -EFAULT;
 752         dev = vdev_to_camera(vdev);
 753
 754         if (dev == NULL)
 755                 return -EIO;
 756
 757         if (!is_present(dev))
 758                 return -EIO;
 759         if (dev->owner && dev->owner != fp)
 760                 return -EBUSY;
 761         dev->owner = fp;
 762         if (!is_streaming(dev)) {
 763                 if (stk_initialise(dev)
 764                         || stk_allocate_buffers(dev, 3)
 765                         || stk_start_stream(dev))
 766                         return -ENOMEM;
 767                 spin_lock_irqsave(&dev->spinlock, flags);
 768                 for (i = 0; i < dev->n_sbufs; i++) {
 769                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 770                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 771                 }
 772                 spin_unlock_irqrestore(&dev->spinlock, flags);
 773         }
 774         if (*f_pos == 0) {
 775                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 776                         return -EWOULDBLOCK;
 777                 ret = wait_event_interruptible(dev->wait_frame,
 778                         !list_empty(&dev->sio_full) || !is_present(dev));
 779                 if (ret)
 780                         return ret;
 781                 if (!is_present(dev))
 782                         return -EIO;
 783         }
 784         if (count + *f_pos > dev->frame_size)
 785                 count = dev->frame_size - *f_pos;
 786         spin_lock_irqsave(&dev->spinlock, flags);
 787         if (list_empty(&dev->sio_full)) {
 788                 spin_unlock_irqrestore(&dev->spinlock, flags);
 789                 STK_ERROR("BUG: No siobufs ready\n");
 790                 return 0;
 791         }
 792         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 793         spin_unlock_irqrestore(&dev->spinlock, flags);
 794
 795         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 796                 return -EFAULT;
 797
 798         *f_pos += count;
 799
 800         if (*f_pos >= dev->frame_size) {
 801                 *f_pos = 0;
 802                 spin_lock_irqsave(&dev->spinlock, flags);
 803                 list_move_tail(&sbuf->list, &dev->sio_avail);
 804                 spin_unlock_irqrestore(&dev->spinlock, flags);
 805         }
 806         return count;
 807 }
 808
 809 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 810 {
 811         struct stk_camera *dev;
 812         struct video_device *vdev;
 813
 814         vdev = video_devdata(fp);
 815
 816         if (vdev == NULL)
 817                 return -EFAULT;
 818
 819         dev = vdev_to_camera(vdev);
 820         if (dev == NULL)
 821                 return -ENODEV;
 822
 823         poll_wait(fp, &dev->wait_frame, wait);
 824
 825         if (!is_present(dev))
 826                 return POLLERR;
 827
 828         if (!list_empty(&dev->sio_full))
 829                 return (POLLIN | POLLRDNORM);
 830
 831         return 0;
 832 }
 833
 834
 835 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 836 {
 837         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 838         sbuf->mapcount++;
 839 }
 840 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 841 {
 842         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 843         sbuf->mapcount--;
 844         if (sbuf->mapcount == 0)
 845                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 846 }
 847 static struct vm_operations_struct stk_v4l_vm_ops = {
 848         .open = stk_v4l_vm_open,
 849         .close = stk_v4l_vm_close
 850 };
 851
 852 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 853 {
 854         unsigned int i;
 855         int ret;
 856         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 857         struct stk_camera *dev;
 858         struct video_device *vdev;
 859         struct stk_sio_buffer *sbuf = NULL;
 860
 861         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 862                 return -EINVAL;
 863
 864         vdev = video_devdata(fp);
 865         dev = vdev_to_camera(vdev);
 866
 867         for (i = 0; i < dev->n_sbufs; i++) {
 868                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 869                         sbuf = dev->sio_bufs + i;
 870                         break;
 871                 }
 872         }
 873         if (sbuf == NULL)
 874                 return -EINVAL;
 875         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 876         if (ret)
 877                 return ret;
 878         vma->vm_flags |= VM_DONTEXPAND;
 879         vma->vm_private_data = sbuf;
 880         vma->vm_ops = &stk_v4l_vm_ops;
 881         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 882         stk_v4l_vm_open(vma);
 883         return 0;
 884 }
 885
 886 /* v4l ioctl handlers */
 887
 888 static int stk_vidioc_querycap(struct file *filp,
 889                 void *priv, struct v4l2_capability *cap)
 890 {
 891         strcpy(cap->driver, "stk");
 892         strcpy(cap->card, "stk");
 893         cap->version = DRIVER_VERSION_NUM;
 894
 895         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 896                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 897         return 0;
 898 }
 899
 900 static int stk_vidioc_enum_input(struct file *filp,
 901                 void *priv, struct v4l2_input *input)
 902 {
 903         if (input->index != 0)
 904                 return -EINVAL;
 905
 906         strcpy(input->name, "Syntek USB Camera");
 907         input->type = V4L2_INPUT_TYPE_CAMERA;
 908         return 0;
 909 }
 910
 911
 912 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 913 {
 914         *i = 0;
 915         return 0;
 916 }
 917
 918 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 919 {
 920         if (i != 0)
 921                 return -EINVAL;
 922         else
 923                 return 0;
 924 }
 925
 926 /* from vivi.c */
 927 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 928 {
 929         return 0;
 930 }
 931
 932 /* List of all V4Lv2 controls supported by the driver */
 933 static struct v4l2_queryctrl stk_controls[] = {
 934         {
 935                 .id      = V4L2_CID_BRIGHTNESS,
 936                 .type    = V4L2_CTRL_TYPE_INTEGER,
 937                 .name    = "Brightness",
 938                 .minimum = 0,
 939                 .maximum = 0xffff,
 940                 .step    = 0x0100,
 941                 .default_value = 0x6000,
 942         },
 943         /*TODO: get more controls to work */
 944 };
 945
 946 static int stk_vidioc_queryctrl(struct file *filp,
 947                 void *priv, struct v4l2_queryctrl *c)
 948 {
 949         int i;
 950         int nbr;
 951         nbr = ARRAY_SIZE(stk_controls);
 952
 953         for (i = 0; i < nbr; i++) {
 954                 if (stk_controls[i].id == c->id) {
 955                         memcpy(c, &stk_controls[i],
 956                                 sizeof(struct v4l2_queryctrl));
 957                         return 0;
 958                 }
 959         }
 960         return -EINVAL;
 961 }
 962
 963 static int stk_vidioc_g_ctrl(struct file *filp,
 964                 void *priv, struct v4l2_control *c)
 965 {
 966         struct stk_camera *dev = priv;
 967         switch (c->id) {
 968         case V4L2_CID_BRIGHTNESS:
 969                 c->value = dev->vsettings.brightness;
 970                 break;
 971         default:
 972                 return -EINVAL;
 973         }
 974         return 0;
 975 }
 976
 977 static int stk_vidioc_s_ctrl(struct file *filp,
 978                 void *priv, struct v4l2_control *c)
 979 {
 980         struct stk_camera *dev = priv;
 981         switch (c->id) {
 982         case V4L2_CID_BRIGHTNESS:
 983                 dev->vsettings.brightness = c->value;
 984                 return stk_sensor_set_brightness(dev, c->value >> 8);
 985         default:
 986                 return -EINVAL;
 987         }
 988         return 0;
 989 }
 990
 991
 992 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 993                 void *priv, struct v4l2_fmtdesc *fmtd)
 994 {
 995         fmtd->flags = 0;
 996
 997         switch (fmtd->index) {
 998         case 0:
 999                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
1000                 strcpy(fmtd->description, "r5g6b5");
1001                 break;
1002         case 1:
1003                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
1004                 strcpy(fmtd->description, "r5g6b5BE");
1005                 break;
1006         case 2:
1007                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
1008                 strcpy(fmtd->description, "yuv4:2:2");
1009                 break;
1010         case 3:
1011                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
1012                 strcpy(fmtd->description, "Raw bayer");
1013                 break;
1014         case 4:
1015                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1016                 strcpy(fmtd->description, "yuv4:2:2");
1017                 break;
1018         default:
1019                 return -EINVAL;
1020         }
1021         return 0;
1022 }
1023
1024 static struct stk_size {
1025         unsigned w;
1026         unsigned h;
1027         enum stk_mode m;
1028 } stk_sizes[] = {
1029         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
1030         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
1031         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
1032         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
1033         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
1034 };
1035
1036 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
1037                 void *priv, struct v4l2_format *f)
1038 {
1039         struct v4l2_pix_format *pix_format = &f->fmt.pix;
1040         struct stk_camera *dev = priv;
1041         int i;
1042
1043         for (i = 0; i < ARRAY_SIZE(stk_sizes)
1044                         && stk_sizes[i].m != dev->vsettings.mode;
1045                 i++);
1046         if (i == ARRAY_SIZE(stk_sizes)) {
1047                 STK_ERROR("ERROR: mode invalid\n");
1048                 return -EINVAL;
1049         }
1050         pix_format->width = stk_sizes[i].w;
1051         pix_format->height = stk_sizes[i].h;
1052         pix_format->field = V4L2_FIELD_NONE;
1053         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
1054         pix_format->priv = 0;
1055         pix_format->pixelformat = dev->vsettings.palette;
1056         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1057                 pix_format->bytesperline = pix_format->width;
1058         else
1059                 pix_format->bytesperline = 2 * pix_format->width;
1060         pix_format->sizeimage = pix_format->bytesperline
1061                                 * pix_format->height;
1062         return 0;
1063 }
1064
1065 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1066                 void *priv, struct v4l2_format *fmtd)
1067 {
1068         int i;
1069         switch (fmtd->fmt.pix.pixelformat) {
1070         case V4L2_PIX_FMT_RGB565:
1071         case V4L2_PIX_FMT_RGB565X:
1072         case V4L2_PIX_FMT_UYVY:
1073         case V4L2_PIX_FMT_YUYV:
1074         case V4L2_PIX_FMT_SBGGR8:
1075                 break;
1076         default:
1077                 return -EINVAL;
1078         }
1079         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1080                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1081                         break;
1082         }
1083         if (i == ARRAY_SIZE(stk_sizes)
1084                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1085                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1086                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1087                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1088                 fmtd->fmt.pix.priv = i - 1;
1089         } else {
1090                 fmtd->fmt.pix.height = stk_sizes[i].h;
1091                 fmtd->fmt.pix.width = stk_sizes[i].w;
1092                 fmtd->fmt.pix.priv = i;
1093         }
1094
1095         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1096         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1097         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1098                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1099         else
1100                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1101         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1102                 * fmtd->fmt.pix.height;
1103         return 0;
1104 }
1105
1106 static int stk_setup_format(struct stk_camera *dev)
1107 {
1108         int i = 0;
1109         int depth;
1110         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1111                 depth = 1;
1112         else
1113                 depth = 2;
1114         while (stk_sizes[i].m != dev->vsettings.mode
1115                         && i < ARRAY_SIZE(stk_sizes))
1116                 i++;
1117         if (i == ARRAY_SIZE(stk_sizes)) {
1118                 STK_ERROR("Something is broken in %s\n", __func__);
1119                 return -EFAULT;
1120         }
1121         /* This registers controls some timings, not sure of what. */
1122         stk_camera_write_reg(dev, 0x001b, 0x0e);
1123         if (dev->vsettings.mode == MODE_SXGA)
1124                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1125         else
1126                 stk_camera_write_reg(dev, 0x001c, 0x46);
1127         /*
1128          * Registers 0x0115 0x0114 are the size of each line (bytes),
1129          * regs 0x0117 0x0116 are the heigth of the image.
1130          */
1131         stk_camera_write_reg(dev, 0x0115,
1132                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1133         stk_camera_write_reg(dev, 0x0114,
1134                 (stk_sizes[i].w * depth) & 0xff);
1135         stk_camera_write_reg(dev, 0x0117,
1136                 (stk_sizes[i].h >> 8) & 0xff);
1137         stk_camera_write_reg(dev, 0x0116,
1138                 stk_sizes[i].h & 0xff);
1139         return stk_sensor_configure(dev);
1140 }
1141
1142 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1143                 void *priv, struct v4l2_format *fmtd)
1144 {
1145         int ret;
1146         struct stk_camera *dev = priv;
1147
1148         if (dev == NULL)
1149                 return -ENODEV;
1150         if (!is_present(dev))
1151                 return -ENODEV;
1152         if (is_streaming(dev))
1153                 return -EBUSY;
1154         if (dev->owner && dev->owner != filp)
1155                 return -EBUSY;
1156         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1157         if (ret)
1158                 return ret;
1159         dev->owner = filp;
1160
1161         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1162         stk_free_buffers(dev);
1163         dev->frame_size = fmtd->fmt.pix.sizeimage;
1164         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1165
1166         stk_initialise(dev);
1167         return stk_setup_format(dev);
1168 }
1169
1170 static int stk_vidioc_reqbufs(struct file *filp,
1171                 void *priv, struct v4l2_requestbuffers *rb)
1172 {
1173         struct stk_camera *dev = priv;
1174
1175         if (dev == NULL)
1176                 return -ENODEV;
1177         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1178                 return -EINVAL;
1179         if (rb->memory != V4L2_MEMORY_MMAP)
1180                 return -EINVAL;
1181         if (is_streaming(dev)
1182                 || (dev->owner && dev->owner != filp))
1183                 return -EBUSY;
1184         dev->owner = filp;
1185
1186         /*FIXME If they ask for zero, we must stop streaming and free */
1187         if (rb->count < 3)
1188                 rb->count = 3;
1189         /* Arbitrary limit */
1190         else if (rb->count > 5)
1191                 rb->count = 5;
1192
1193         stk_allocate_buffers(dev, rb->count);
1194         rb->count = dev->n_sbufs;
1195         return 0;
1196 }
1197
1198 static int stk_vidioc_querybuf(struct file *filp,
1199                 void *priv, struct v4l2_buffer *buf)
1200 {
1201         int index;
1202         struct stk_camera *dev = priv;
1203         struct stk_sio_buffer *sbuf;
1204
1205         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1206                 return -EINVAL;
1207
1208         index = buf->index;
1209
1210         if (index < 0 || index >= dev->n_sbufs)
1211                 return -EINVAL;
1212         sbuf = dev->sio_bufs + buf->index;
1213         *buf = sbuf->v4lbuf;
1214         return 0;
1215 }
1216
1217 static int stk_vidioc_qbuf(struct file *filp,
1218                 void *priv, struct v4l2_buffer *buf)
1219 {
1220         struct stk_camera *dev = priv;
1221         struct stk_sio_buffer *sbuf;
1222         unsigned long flags;
1223         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1224                 return -EINVAL;
1225
1226         if (buf->memory != V4L2_MEMORY_MMAP)
1227                 return -EINVAL;
1228
1229         if (buf->index < 0 || buf->index >= dev->n_sbufs)
1230                 return -EINVAL;
1231         sbuf = dev->sio_bufs + buf->index;
1232         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1233                 return 0;
1234         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1235         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1236         spin_lock_irqsave(&dev->spinlock, flags);
1237         list_add_tail(&sbuf->list, &dev->sio_avail);
1238         *buf = sbuf->v4lbuf;
1239         spin_unlock_irqrestore(&dev->spinlock, flags);
1240         return 0;
1241 }
1242
1243 static int stk_vidioc_dqbuf(struct file *filp,
1244                 void *priv, struct v4l2_buffer *buf)
1245 {
1246         struct stk_camera *dev = priv;
1247         struct stk_sio_buffer *sbuf;
1248         unsigned long flags;
1249         int ret;
1250
1251         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1252                 || !is_streaming(dev))
1253                 return -EINVAL;
1254
1255         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1256                 return -EWOULDBLOCK;
1257         ret = wait_event_interruptible(dev->wait_frame,
1258                 !list_empty(&dev->sio_full) || !is_present(dev));
1259         if (ret)
1260                 return ret;
1261         if (!is_present(dev))
1262                 return -EIO;
1263
1264         spin_lock_irqsave(&dev->spinlock, flags);
1265         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1266         list_del_init(&sbuf->list);
1267         spin_unlock_irqrestore(&dev->spinlock, flags);
1268         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1269         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1270         sbuf->v4lbuf.sequence = ++dev->sequence;
1271         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1272
1273         *buf = sbuf->v4lbuf;
1274         return 0;
1275 }
1276
1277 static int stk_vidioc_streamon(struct file *filp,
1278                 void *priv, enum v4l2_buf_type type)
1279 {
1280         struct stk_camera *dev = priv;
1281         if (is_streaming(dev))
1282                 return 0;
1283         if (dev->sio_bufs == NULL)
1284                 return -EINVAL;
1285         dev->sequence = 0;
1286         return stk_start_stream(dev);
1287 }
1288
1289 static int stk_vidioc_streamoff(struct file *filp,
1290                 void *priv, enum v4l2_buf_type type)
1291 {
1292         struct stk_camera *dev = priv;
1293         unsigned long flags;
1294         int i;
1295         stk_stop_stream(dev);
1296         spin_lock_irqsave(&dev->spinlock, flags);
1297         INIT_LIST_HEAD(&dev->sio_avail);
1298         INIT_LIST_HEAD(&dev->sio_full);
1299         for (i = 0; i < dev->n_sbufs; i++) {
1300                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1301                 dev->sio_bufs[i].v4lbuf.flags = 0;
1302         }
1303         spin_unlock_irqrestore(&dev->spinlock, flags);
1304         return 0;
1305 }
1306
1307
1308 static int stk_vidioc_g_parm(struct file *filp,
1309                 void *priv, struct v4l2_streamparm *sp)
1310 {
1311         if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1312                 return -EINVAL;
1313
1314         sp->parm.capture.capability = 0;
1315         sp->parm.capture.capturemode = 0;
1316         /*FIXME This is not correct */
1317         sp->parm.capture.timeperframe.numerator = 1;
1318         sp->parm.capture.timeperframe.denominator = 30;
1319         sp->parm.capture.readbuffers = 2;
1320         sp->parm.capture.extendedmode = 0;
1321         return 0;
1322 }
1323
1324 static struct file_operations v4l_stk_fops = {
1325         .owner = THIS_MODULE,
1326         .open = v4l_stk_open,
1327         .release = v4l_stk_release,
1328         .read = v4l_stk_read,
1329         .poll = v4l_stk_poll,
1330         .mmap = v4l_stk_mmap,
1331         .ioctl = video_ioctl2,
1332 #ifdef CONFIG_COMPAT
1333         .compat_ioctl = v4l_compat_ioctl32,
1334 #endif
1335         .llseek = no_llseek
1336 };
1337
1338 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1339         .vidioc_querycap = stk_vidioc_querycap,
1340         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1341         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1342         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1343         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1344         .vidioc_enum_input = stk_vidioc_enum_input,
1345         .vidioc_s_input = stk_vidioc_s_input,
1346         .vidioc_g_input = stk_vidioc_g_input,
1347         .vidioc_s_std = stk_vidioc_s_std,
1348         .vidioc_reqbufs = stk_vidioc_reqbufs,
1349         .vidioc_querybuf = stk_vidioc_querybuf,
1350         .vidioc_qbuf = stk_vidioc_qbuf,
1351         .vidioc_dqbuf = stk_vidioc_dqbuf,
1352         .vidioc_streamon = stk_vidioc_streamon,
1353         .vidioc_streamoff = stk_vidioc_streamoff,
1354         .vidioc_queryctrl = stk_vidioc_queryctrl,
1355         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1356         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1357         .vidioc_g_parm = stk_vidioc_g_parm,
1358 };
1359
1360 static void stk_v4l_dev_release(struct video_device *vd)
1361 {
1362 }
1363
1364 static struct video_device stk_v4l_data = {
1365         .name = "stkwebcam",
1366         .minor = -1,
1367         .tvnorms = V4L2_STD_UNKNOWN,
1368         .current_norm = V4L2_STD_UNKNOWN,
1369         .fops = &v4l_stk_fops,
1370         .ioctl_ops = &v4l_stk_ioctl_ops,
1371         .release = stk_v4l_dev_release,
1372 };
1373
1374
1375 static int stk_register_video_device(struct stk_camera *dev)
1376 {
1377         int err;
1378
1379         dev->vdev = stk_v4l_data;
1380         dev->vdev.debug = debug;
1381         dev->vdev.parent = &dev->interface->dev;
1382         video_set_drvdata(&dev->vdev, dev);
1383         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1384         if (err)
1385                 STK_ERROR("v4l registration failed\n");
1386         else
1387                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1388                         " /dev/video%d\n", dev->vdev.minor);
1389         return err;
1390 }
1391
1392
1393 /* USB Stuff */
1394
1395 static int stk_camera_probe(struct usb_interface *interface,
1396                 const struct usb_device_id *id)
1397 {
1398         int i;
1399         int err;
1400
1401         struct stk_camera *dev = NULL;
1402         struct usb_device *udev = interface_to_usbdev(interface);
1403         struct usb_host_interface *iface_desc;
1404         struct usb_endpoint_descriptor *endpoint;
1405
1406         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1407         if (dev == NULL) {
1408                 STK_ERROR("Out of memory !\n");
1409                 return -ENOMEM;
1410         }
1411
1412         kref_init(&dev->kref);
1413         spin_lock_init(&dev->spinlock);
1414         init_waitqueue_head(&dev->wait_frame);
1415
1416         dev->udev = udev;
1417         dev->interface = interface;
1418         usb_get_intf(interface);
1419
1420         dev->vsettings.vflip = vflip;
1421         dev->vsettings.hflip = hflip;
1422         dev->n_sbufs = 0;
1423         set_present(dev);
1424
1425         /* Set up the endpoint information
1426          * use only the first isoc-in endpoint
1427          * for the current alternate setting */
1428         iface_desc = interface->cur_altsetting;
1429
1430         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1431                 endpoint = &iface_desc->endpoint[i].desc;
1432
1433                 if (!dev->isoc_ep
1434                         && ((endpoint->bEndpointAddress
1435                                 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1436                         && ((endpoint->bmAttributes
1437                                 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1438                         /* we found an isoc in endpoint */
1439                         dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1440                         break;
1441                 }
1442         }
1443         if (!dev->isoc_ep) {
1444                 STK_ERROR("Could not find isoc-in endpoint");
1445                 kref_put(&dev->kref, stk_camera_cleanup);
1446                 return -ENODEV;
1447         }
1448         dev->vsettings.brightness = 0x7fff;
1449         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1450         dev->vsettings.mode = MODE_VGA;
1451         dev->frame_size = 640 * 480 * 2;
1452
1453         INIT_LIST_HEAD(&dev->sio_avail);
1454         INIT_LIST_HEAD(&dev->sio_full);
1455
1456         usb_set_intfdata(interface, dev);
1457
1458         err = stk_register_video_device(dev);
1459         if (err) {
1460                 kref_put(&dev->kref, stk_camera_cleanup);
1461                 return err;
1462         }
1463
1464         stk_create_sysfs_files(&dev->vdev);
1465         usb_autopm_enable(dev->interface);
1466
1467         return 0;
1468 }
1469
1470 static void stk_camera_disconnect(struct usb_interface *interface)
1471 {
1472         struct stk_camera *dev = usb_get_intfdata(interface);
1473
1474         usb_set_intfdata(interface, NULL);
1475         unset_present(dev);
1476
1477         wake_up_interruptible(&dev->wait_frame);
1478         stk_remove_sysfs_files(&dev->vdev);
1479
1480         kref_put(&dev->kref, stk_camera_cleanup);
1481 }
1482
1483 #ifdef CONFIG_PM
1484 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1485 {
1486         struct stk_camera *dev = usb_get_intfdata(intf);
1487         if (is_streaming(dev)) {
1488                 stk_stop_stream(dev);
1489                 /* yes, this is ugly */
1490                 set_streaming(dev);
1491         }
1492         return 0;
1493 }
1494
1495 static int stk_camera_resume(struct usb_interface *intf)
1496 {
1497         struct stk_camera *dev = usb_get_intfdata(intf);
1498         if (!is_initialised(dev))
1499                 return 0;
1500         unset_initialised(dev);
1501         stk_initialise(dev);
1502         stk_setup_format(dev);
1503         if (is_streaming(dev))
1504                 stk_start_stream(dev);
1505         return 0;
1506 }
1507 #endif
1508
1509 static struct usb_driver stk_camera_driver = {
1510         .name = "stkwebcam",
1511         .probe = stk_camera_probe,
1512         .disconnect = stk_camera_disconnect,
1513         .id_table = stkwebcam_table,
1514 #ifdef CONFIG_PM
1515         .suspend = stk_camera_suspend,
1516         .resume = stk_camera_resume,
1517 #endif
1518 };
1519
1520
1521 static int __init stk_camera_init(void)
1522 {
1523         int result;
1524
1525         result = usb_register(&stk_camera_driver);
1526         if (result)
1527                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1528
1529
1530         return result;
1531 }
1532
1533 static void __exit stk_camera_exit(void)
1534 {
1535         usb_deregister(&stk_camera_driver);
1536 }
1537
1538 module_init(stk_camera_init);
1539 module_exit(stk_camera_exit);
1540
1541