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         dev->vdev.priv = 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                                 list_move_tail(dev->sio_avail.next,
 449                                         &dev->sio_full);
 450                                 wake_up(&dev->wait_frame);
 451                                 if (list_empty(&dev->sio_avail)) {
 452                                         (void) (printk_ratelimit() &&
 453                                         STK_ERROR("No buffer available\n"));
 454                                         goto resubmit;
 455                                 }
 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                 } else {
 462                         framelen -= 4;
 463                         iso_buf += 4;
 464                 }
 465
 466                 /* Our buffer is full !!! */
 467                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 468                         (void) (printk_ratelimit() &&
 469                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 470                         /*FIXME Do something here? */
 471                         continue;
 472                 }
 473                 spin_unlock_irqrestore(&dev->spinlock, flags);
 474                 memcpy(fill, iso_buf, framelen);
 475                 spin_lock_irqsave(&dev->spinlock, flags);
 476                 fill += framelen;
 477
 478                 /* New size of our buffer */
 479                 fb->v4lbuf.bytesused += framelen;
 480         }
 481
 482 resubmit:
 483         spin_unlock_irqrestore(&dev->spinlock, flags);
 484         urb->dev = dev->udev;
 485         ret = usb_submit_urb(urb, GFP_ATOMIC);
 486         if (ret != 0) {
 487                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 488                         ret);
 489         }
 490 }
 491
 492 /* -------------------------------------------- */
 493
 494 static int stk_prepare_iso(struct stk_camera *dev)
 495 {
 496         void *kbuf;
 497         int i, j;
 498         struct urb *urb;
 499         struct usb_device *udev;
 500
 501         if (dev == NULL)
 502                 return -ENXIO;
 503         udev = dev->udev;
 504
 505         if (dev->isobufs)
 506                 STK_ERROR("isobufs already allocated. Bad\n");
 507         else
 508                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
 509                                         GFP_KERNEL);
 510         if (dev->isobufs == NULL) {
 511                 STK_ERROR("Unable to allocate iso buffers\n");
 512                 return -ENOMEM;
 513         }
 514         for (i = 0; i < MAX_ISO_BUFS; i++) {
 515                 if (dev->isobufs[i].data == NULL) {
 516                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 517                         if (kbuf == NULL) {
 518                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 519                                         i);
 520                                 goto isobufs_out;
 521                         }
 522                         dev->isobufs[i].data = kbuf;
 523                 } else
 524                         STK_ERROR("isobuf data already allocated\n");
 525                 if (dev->isobufs[i].urb == NULL) {
 526                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 527                         if (urb == NULL) {
 528                                 STK_ERROR("Failed to allocate URB %d\n", i);
 529                                 goto isobufs_out;
 530                         }
 531                         dev->isobufs[i].urb = urb;
 532                 } else {
 533                         STK_ERROR("Killing URB\n");
 534                         usb_kill_urb(dev->isobufs[i].urb);
 535                         urb = dev->isobufs[i].urb;
 536                 }
 537                 urb->interval = 1;
 538                 urb->dev = udev;
 539                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 540                 urb->transfer_flags = URB_ISO_ASAP;
 541                 urb->transfer_buffer = dev->isobufs[i].data;
 542                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 543                 urb->complete = stk_isoc_handler;
 544                 urb->context = dev;
 545                 urb->start_frame = 0;
 546                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 547
 548                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 549                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 550                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 551                 }
 552         }
 553         set_memallocd(dev);
 554         return 0;
 555
 556 isobufs_out:
 557         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 558                 kfree(dev->isobufs[i].data);
 559         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 560                 usb_free_urb(dev->isobufs[i].urb);
 561         kfree(dev->isobufs);
 562         dev->isobufs = NULL;
 563         return -ENOMEM;
 564 }
 565
 566 static void stk_clean_iso(struct stk_camera *dev)
 567 {
 568         int i;
 569
 570         if (dev == NULL || dev->isobufs == NULL)
 571                 return;
 572
 573         for (i = 0; i < MAX_ISO_BUFS; i++) {
 574                 struct urb *urb;
 575
 576                 urb = dev->isobufs[i].urb;
 577                 if (urb) {
 578                         if (atomic_read(&dev->urbs_used))
 579                                 usb_kill_urb(urb);
 580                         usb_free_urb(urb);
 581                 }
 582                 kfree(dev->isobufs[i].data);
 583         }
 584         kfree(dev->isobufs);
 585         dev->isobufs = NULL;
 586         unset_memallocd(dev);
 587 }
 588
 589 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 590 {
 591         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 592         INIT_LIST_HEAD(&buf->list);
 593         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 594         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 595         if (buf->buffer == NULL)
 596                 return -ENOMEM;
 597         buf->mapcount = 0;
 598         buf->dev = dev;
 599         buf->v4lbuf.index = index;
 600         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 601         buf->v4lbuf.field = V4L2_FIELD_NONE;
 602         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 603         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 604         return 0;
 605 }
 606
 607 static int stk_free_sio_buffers(struct stk_camera *dev)
 608 {
 609         int i;
 610         int nbufs;
 611         unsigned long flags;
 612         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 613                 return 0;
 614         /*
 615         * If any buffers are mapped, we cannot free them at all.
 616         */
 617         for (i = 0; i < dev->n_sbufs; i++) {
 618                 if (dev->sio_bufs[i].mapcount > 0)
 619                         return -EBUSY;
 620         }
 621         /*
 622         * OK, let's do it.
 623         */
 624         spin_lock_irqsave(&dev->spinlock, flags);
 625         INIT_LIST_HEAD(&dev->sio_avail);
 626         INIT_LIST_HEAD(&dev->sio_full);
 627         nbufs = dev->n_sbufs;
 628         dev->n_sbufs = 0;
 629         spin_unlock_irqrestore(&dev->spinlock, flags);
 630         for (i = 0; i < nbufs; i++) {
 631                 if (dev->sio_bufs[i].buffer != NULL)
 632                         vfree(dev->sio_bufs[i].buffer);
 633         }
 634         kfree(dev->sio_bufs);
 635         dev->sio_bufs = NULL;
 636         return 0;
 637 }
 638
 639 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 640 {
 641         int i;
 642         if (dev->sio_bufs != NULL)
 643                 STK_ERROR("sio_bufs already allocated\n");
 644         else {
 645                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 646                                 GFP_KERNEL);
 647                 if (dev->sio_bufs == NULL)
 648                         return -ENOMEM;
 649                 for (i = 0; i < n_sbufs; i++) {
 650                         if (stk_setup_siobuf(dev, i))
 651                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
 652                         dev->n_sbufs = i+1;
 653                 }
 654         }
 655         return 0;
 656 }
 657
 658 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 659 {
 660         int err;
 661         err = stk_prepare_iso(dev);
 662         if (err) {
 663                 stk_clean_iso(dev);
 664                 return err;
 665         }
 666         err = stk_prepare_sio_buffers(dev, n_sbufs);
 667         if (err) {
 668                 stk_free_sio_buffers(dev);
 669                 return err;
 670         }
 671         return 0;
 672 }
 673
 674 static void stk_free_buffers(struct stk_camera *dev)
 675 {
 676         stk_clean_iso(dev);
 677         stk_free_sio_buffers(dev);
 678 }
 679 /* -------------------------------------------- */
 680
 681 /* v4l file operations */
 682
 683 static int v4l_stk_open(struct inode *inode, struct file *fp)
 684 {
 685         struct stk_camera *dev;
 686         struct video_device *vdev;
 687
 688         vdev = video_devdata(fp);
 689         dev = vdev_to_camera(vdev);
 690
 691         if (dev == NULL || !is_present(dev))
 692                 return -ENXIO;
 693         fp->private_data = vdev;
 694         kref_get(&dev->kref);
 695         usb_autopm_get_interface(dev->interface);
 696
 697         return 0;
 698 }
 699
 700 static int v4l_stk_release(struct inode *inode, struct file *fp)
 701 {
 702         struct stk_camera *dev;
 703         struct video_device *vdev;
 704
 705         vdev = video_devdata(fp);
 706         if (vdev == NULL) {
 707                 STK_ERROR("v4l_release called w/o video devdata\n");
 708                 return -EFAULT;
 709         }
 710         dev = vdev_to_camera(vdev);
 711         if (dev == NULL) {
 712                 STK_ERROR("v4l_release called on removed device\n");
 713                 return -ENODEV;
 714         }
 715
 716         if (dev->owner != fp) {
 717                 usb_autopm_put_interface(dev->interface);
 718                 kref_put(&dev->kref, stk_camera_cleanup);
 719                 return 0;
 720         }
 721
 722         stk_stop_stream(dev);
 723
 724         stk_free_buffers(dev);
 725
 726         dev->owner = NULL;
 727
 728         usb_autopm_put_interface(dev->interface);
 729         kref_put(&dev->kref, stk_camera_cleanup);
 730
 731         return 0;
 732 }
 733
 734 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 735                 size_t count, loff_t *f_pos)
 736 {
 737         int i;
 738         int ret;
 739         unsigned long flags;
 740         struct stk_camera *dev;
 741         struct video_device *vdev;
 742         struct stk_sio_buffer *sbuf;
 743
 744         vdev = video_devdata(fp);
 745         if (vdev == NULL)
 746                 return -EFAULT;
 747         dev = vdev_to_camera(vdev);
 748
 749         if (dev == NULL)
 750                 return -EIO;
 751
 752         if (!is_present(dev))
 753                 return -EIO;
 754         if (dev->owner && dev->owner != fp)
 755                 return -EBUSY;
 756         dev->owner = fp;
 757         if (!is_streaming(dev)) {
 758                 if (stk_initialise(dev)
 759                         || stk_allocate_buffers(dev, 3)
 760                         || stk_start_stream(dev))
 761                         return -ENOMEM;
 762                 spin_lock_irqsave(&dev->spinlock, flags);
 763                 for (i = 0; i < dev->n_sbufs; i++) {
 764                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 765                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 766                 }
 767                 spin_unlock_irqrestore(&dev->spinlock, flags);
 768         }
 769         if (*f_pos == 0) {
 770                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 771                         return -EWOULDBLOCK;
 772                 ret = wait_event_interruptible(dev->wait_frame,
 773                         !list_empty(&dev->sio_full) || !is_present(dev));
 774                 if (ret)
 775                         return ret;
 776                 if (!is_present(dev))
 777                         return -EIO;
 778         }
 779         if (count + *f_pos > dev->frame_size)
 780                 count = dev->frame_size - *f_pos;
 781         spin_lock_irqsave(&dev->spinlock, flags);
 782         if (list_empty(&dev->sio_full)) {
 783                 spin_unlock_irqrestore(&dev->spinlock, flags);
 784                 STK_ERROR("BUG: No siobufs ready\n");
 785                 return 0;
 786         }
 787         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 788         spin_unlock_irqrestore(&dev->spinlock, flags);
 789
 790         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 791                 return -EFAULT;
 792
 793         *f_pos += count;
 794
 795         if (*f_pos >= dev->frame_size) {
 796                 *f_pos = 0;
 797                 spin_lock_irqsave(&dev->spinlock, flags);
 798                 list_move_tail(&sbuf->list, &dev->sio_avail);
 799                 spin_unlock_irqrestore(&dev->spinlock, flags);
 800         }
 801         return count;
 802 }
 803
 804 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 805 {
 806         struct stk_camera *dev;
 807         struct video_device *vdev;
 808
 809         vdev = video_devdata(fp);
 810
 811         if (vdev == NULL)
 812                 return -EFAULT;
 813
 814         dev = vdev_to_camera(vdev);
 815         if (dev == NULL)
 816                 return -ENODEV;
 817
 818         poll_wait(fp, &dev->wait_frame, wait);
 819
 820         if (!is_present(dev))
 821                 return POLLERR;
 822
 823         if (!list_empty(&dev->sio_full))
 824                 return (POLLIN | POLLRDNORM);
 825
 826         return 0;
 827 }
 828
 829
 830 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 831 {
 832         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 833         sbuf->mapcount++;
 834 }
 835 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 836 {
 837         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 838         sbuf->mapcount--;
 839         if (sbuf->mapcount == 0)
 840                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 841 }
 842 static struct vm_operations_struct stk_v4l_vm_ops = {
 843         .open = stk_v4l_vm_open,
 844         .close = stk_v4l_vm_close
 845 };
 846
 847 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 848 {
 849         unsigned int i;
 850         int ret;
 851         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 852         struct stk_camera *dev;
 853         struct video_device *vdev;
 854         struct stk_sio_buffer *sbuf = NULL;
 855
 856         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 857                 return -EINVAL;
 858
 859         vdev = video_devdata(fp);
 860         dev = vdev_to_camera(vdev);
 861
 862         for (i = 0; i < dev->n_sbufs; i++) {
 863                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 864                         sbuf = dev->sio_bufs + i;
 865                         break;
 866                 }
 867         }
 868         if (sbuf == NULL)
 869                 return -EINVAL;
 870         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 871         if (ret)
 872                 return ret;
 873         vma->vm_flags |= VM_DONTEXPAND;
 874         vma->vm_private_data = sbuf;
 875         vma->vm_ops = &stk_v4l_vm_ops;
 876         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 877         stk_v4l_vm_open(vma);
 878         return 0;
 879 }
 880
 881 /* v4l ioctl handlers */
 882
 883 static int stk_vidioc_querycap(struct file *filp,
 884                 void *priv, struct v4l2_capability *cap)
 885 {
 886         strcpy(cap->driver, "stk");
 887         strcpy(cap->card, "stk");
 888         cap->version = DRIVER_VERSION_NUM;
 889
 890         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 891                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 892         return 0;
 893 }
 894
 895 static int stk_vidioc_enum_input(struct file *filp,
 896                 void *priv, struct v4l2_input *input)
 897 {
 898         if (input->index != 0)
 899                 return -EINVAL;
 900
 901         strcpy(input->name, "Syntek USB Camera");
 902         input->type = V4L2_INPUT_TYPE_CAMERA;
 903         return 0;
 904 }
 905
 906
 907 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 908 {
 909         *i = 0;
 910         return 0;
 911 }
 912
 913 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 914 {
 915         if (i != 0)
 916                 return -EINVAL;
 917         else
 918                 return 0;
 919 }
 920
 921 /* from vivi.c */
 922 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 923 {
 924         return 0;
 925 }
 926
 927 /* List of all V4Lv2 controls supported by the driver */
 928 static struct v4l2_queryctrl stk_controls[] = {
 929         {
 930                 .id      = V4L2_CID_BRIGHTNESS,
 931                 .type    = V4L2_CTRL_TYPE_INTEGER,
 932                 .name    = "Brightness",
 933                 .minimum = 0,
 934                 .maximum = 0xffff,
 935                 .step    = 0x0100,
 936                 .default_value = 0x6000,
 937         },
 938         /*TODO: get more controls to work */
 939 };
 940
 941 static int stk_vidioc_queryctrl(struct file *filp,
 942                 void *priv, struct v4l2_queryctrl *c)
 943 {
 944         int i;
 945         int nbr;
 946         nbr = ARRAY_SIZE(stk_controls);
 947
 948         for (i = 0; i < nbr; i++) {
 949                 if (stk_controls[i].id == c->id) {
 950                         memcpy(c, &stk_controls[i],
 951                                 sizeof(struct v4l2_queryctrl));
 952                         return 0;
 953                 }
 954         }
 955         return -EINVAL;
 956 }
 957
 958 static int stk_vidioc_g_ctrl(struct file *filp,
 959                 void *priv, struct v4l2_control *c)
 960 {
 961         struct stk_camera *dev = priv;
 962         switch (c->id) {
 963         case V4L2_CID_BRIGHTNESS:
 964                 c->value = dev->vsettings.brightness;
 965                 break;
 966         default:
 967                 return -EINVAL;
 968         }
 969         return 0;
 970 }
 971
 972 static int stk_vidioc_s_ctrl(struct file *filp,
 973                 void *priv, struct v4l2_control *c)
 974 {
 975         struct stk_camera *dev = priv;
 976         switch (c->id) {
 977         case V4L2_CID_BRIGHTNESS:
 978                 dev->vsettings.brightness = c->value;
 979                 return stk_sensor_set_brightness(dev, c->value >> 8);
 980         default:
 981                 return -EINVAL;
 982         }
 983         return 0;
 984 }
 985
 986
 987 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 988                 void *priv, struct v4l2_fmtdesc *fmtd)
 989 {
 990         fmtd->flags = 0;
 991
 992         switch (fmtd->index) {
 993         case 0:
 994                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 995                 strcpy(fmtd->description, "r5g6b5");
 996                 break;
 997         case 1:
 998                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 999                 strcpy(fmtd->description, "r5g6b5BE");
1000                 break;
1001         case 2:
1002                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
1003                 strcpy(fmtd->description, "yuv4:2:2");
1004                 break;
1005         case 3:
1006                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
1007                 strcpy(fmtd->description, "Raw bayer");
1008                 break;
1009         case 4:
1010                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1011                 strcpy(fmtd->description, "yuv4:2:2");
1012                 break;
1013         default:
1014                 return -EINVAL;
1015         }
1016         return 0;
1017 }
1018
1019 static struct stk_size {
1020         unsigned w;
1021         unsigned h;
1022         enum stk_mode m;
1023 } stk_sizes[] = {
1024         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
1025         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
1026         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
1027         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
1028         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
1029 };
1030
1031 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
1032                 void *priv, struct v4l2_format *f)
1033 {
1034         struct v4l2_pix_format *pix_format = &f->fmt.pix;
1035         struct stk_camera *dev = priv;
1036         int i;
1037
1038         for (i = 0; i < ARRAY_SIZE(stk_sizes)
1039                         && stk_sizes[i].m != dev->vsettings.mode;
1040                 i++);
1041         if (i == ARRAY_SIZE(stk_sizes)) {
1042                 STK_ERROR("ERROR: mode invalid\n");
1043                 return -EINVAL;
1044         }
1045         pix_format->width = stk_sizes[i].w;
1046         pix_format->height = stk_sizes[i].h;
1047         pix_format->field = V4L2_FIELD_NONE;
1048         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
1049         pix_format->priv = 0;
1050         pix_format->pixelformat = dev->vsettings.palette;
1051         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1052                 pix_format->bytesperline = pix_format->width;
1053         else
1054                 pix_format->bytesperline = 2 * pix_format->width;
1055         pix_format->sizeimage = pix_format->bytesperline
1056                                 * pix_format->height;
1057         return 0;
1058 }
1059
1060 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1061                 void *priv, struct v4l2_format *fmtd)
1062 {
1063         int i;
1064         switch (fmtd->fmt.pix.pixelformat) {
1065         case V4L2_PIX_FMT_RGB565:
1066         case V4L2_PIX_FMT_RGB565X:
1067         case V4L2_PIX_FMT_UYVY:
1068         case V4L2_PIX_FMT_YUYV:
1069         case V4L2_PIX_FMT_SBGGR8:
1070                 break;
1071         default:
1072                 return -EINVAL;
1073         }
1074         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1075                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1076                         break;
1077         }
1078         if (i == ARRAY_SIZE(stk_sizes)
1079                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1080                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1081                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1082                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1083                 fmtd->fmt.pix.priv = i - 1;
1084         } else {
1085                 fmtd->fmt.pix.height = stk_sizes[i].h;
1086                 fmtd->fmt.pix.width = stk_sizes[i].w;
1087                 fmtd->fmt.pix.priv = i;
1088         }
1089
1090         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1091         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1092         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1093                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1094         else
1095                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1096         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1097                 * fmtd->fmt.pix.height;
1098         return 0;
1099 }
1100
1101 static int stk_setup_format(struct stk_camera *dev)
1102 {
1103         int i = 0;
1104         int depth;
1105         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1106                 depth = 1;
1107         else
1108                 depth = 2;
1109         while (stk_sizes[i].m != dev->vsettings.mode
1110                         && i < ARRAY_SIZE(stk_sizes))
1111                 i++;
1112         if (i == ARRAY_SIZE(stk_sizes)) {
1113                 STK_ERROR("Something is broken in %s\n", __func__);
1114                 return -EFAULT;
1115         }
1116         /* This registers controls some timings, not sure of what. */
1117         stk_camera_write_reg(dev, 0x001b, 0x0e);
1118         if (dev->vsettings.mode == MODE_SXGA)
1119                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1120         else
1121                 stk_camera_write_reg(dev, 0x001c, 0x46);
1122         /*
1123          * Registers 0x0115 0x0114 are the size of each line (bytes),
1124          * regs 0x0117 0x0116 are the heigth of the image.
1125          */
1126         stk_camera_write_reg(dev, 0x0115,
1127                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1128         stk_camera_write_reg(dev, 0x0114,
1129                 (stk_sizes[i].w * depth) & 0xff);
1130         stk_camera_write_reg(dev, 0x0117,
1131                 (stk_sizes[i].h >> 8) & 0xff);
1132         stk_camera_write_reg(dev, 0x0116,
1133                 stk_sizes[i].h & 0xff);
1134         return stk_sensor_configure(dev);
1135 }
1136
1137 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1138                 void *priv, struct v4l2_format *fmtd)
1139 {
1140         int ret;
1141         struct stk_camera *dev = priv;
1142
1143         if (dev == NULL)
1144                 return -ENODEV;
1145         if (!is_present(dev))
1146                 return -ENODEV;
1147         if (is_streaming(dev))
1148                 return -EBUSY;
1149         if (dev->owner && dev->owner != filp)
1150                 return -EBUSY;
1151         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1152         if (ret)
1153                 return ret;
1154         dev->owner = filp;
1155
1156         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1157         stk_free_buffers(dev);
1158         dev->frame_size = fmtd->fmt.pix.sizeimage;
1159         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1160
1161         stk_initialise(dev);
1162         return stk_setup_format(dev);
1163 }
1164
1165 static int stk_vidioc_reqbufs(struct file *filp,
1166                 void *priv, struct v4l2_requestbuffers *rb)
1167 {
1168         struct stk_camera *dev = priv;
1169
1170         if (dev == NULL)
1171                 return -ENODEV;
1172         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1173                 return -EINVAL;
1174         if (rb->memory != V4L2_MEMORY_MMAP)
1175                 return -EINVAL;
1176         if (is_streaming(dev)
1177                 || (dev->owner && dev->owner != filp))
1178                 return -EBUSY;
1179         dev->owner = filp;
1180
1181         /*FIXME If they ask for zero, we must stop streaming and free */
1182         if (rb->count < 3)
1183                 rb->count = 3;
1184         /* Arbitrary limit */
1185         else if (rb->count > 5)
1186                 rb->count = 5;
1187
1188         stk_allocate_buffers(dev, rb->count);
1189         rb->count = dev->n_sbufs;
1190         return 0;
1191 }
1192
1193 static int stk_vidioc_querybuf(struct file *filp,
1194                 void *priv, struct v4l2_buffer *buf)
1195 {
1196         int index;
1197         struct stk_camera *dev = priv;
1198         struct stk_sio_buffer *sbuf;
1199
1200         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1201                 return -EINVAL;
1202
1203         index = buf->index;
1204
1205         if (index < 0 || index >= dev->n_sbufs)
1206                 return -EINVAL;
1207         sbuf = dev->sio_bufs + buf->index;
1208         *buf = sbuf->v4lbuf;
1209         return 0;
1210 }
1211
1212 static int stk_vidioc_qbuf(struct file *filp,
1213                 void *priv, struct v4l2_buffer *buf)
1214 {
1215         struct stk_camera *dev = priv;
1216         struct stk_sio_buffer *sbuf;
1217         unsigned long flags;
1218         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1219                 return -EINVAL;
1220
1221         if (buf->memory != V4L2_MEMORY_MMAP)
1222                 return -EINVAL;
1223
1224         if (buf->index < 0 || buf->index >= dev->n_sbufs)
1225                 return -EINVAL;
1226         sbuf = dev->sio_bufs + buf->index;
1227         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1228                 return 0;
1229         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1230         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1231         spin_lock_irqsave(&dev->spinlock, flags);
1232         list_add_tail(&sbuf->list, &dev->sio_avail);
1233         *buf = sbuf->v4lbuf;
1234         spin_unlock_irqrestore(&dev->spinlock, flags);
1235         return 0;
1236 }
1237
1238 static int stk_vidioc_dqbuf(struct file *filp,
1239                 void *priv, struct v4l2_buffer *buf)
1240 {
1241         struct stk_camera *dev = priv;
1242         struct stk_sio_buffer *sbuf;
1243         unsigned long flags;
1244         int ret;
1245
1246         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1247                 || !is_streaming(dev))
1248                 return -EINVAL;
1249
1250         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1251                 return -EWOULDBLOCK;
1252         ret = wait_event_interruptible(dev->wait_frame,
1253                 !list_empty(&dev->sio_full) || !is_present(dev));
1254         if (ret)
1255                 return ret;
1256         if (!is_present(dev))
1257                 return -EIO;
1258
1259         spin_lock_irqsave(&dev->spinlock, flags);
1260         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1261         list_del_init(&sbuf->list);
1262         spin_unlock_irqrestore(&dev->spinlock, flags);
1263         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1264         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1265         sbuf->v4lbuf.sequence = ++dev->sequence;
1266         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1267
1268         *buf = sbuf->v4lbuf;
1269         return 0;
1270 }
1271
1272 static int stk_vidioc_streamon(struct file *filp,
1273                 void *priv, enum v4l2_buf_type type)
1274 {
1275         struct stk_camera *dev = priv;
1276         if (is_streaming(dev))
1277                 return 0;
1278         if (dev->sio_bufs == NULL)
1279                 return -EINVAL;
1280         dev->sequence = 0;
1281         return stk_start_stream(dev);
1282 }
1283
1284 static int stk_vidioc_streamoff(struct file *filp,
1285                 void *priv, enum v4l2_buf_type type)
1286 {
1287         struct stk_camera *dev = priv;
1288         unsigned long flags;
1289         int i;
1290         stk_stop_stream(dev);
1291         spin_lock_irqsave(&dev->spinlock, flags);
1292         INIT_LIST_HEAD(&dev->sio_avail);
1293         INIT_LIST_HEAD(&dev->sio_full);
1294         for (i = 0; i < dev->n_sbufs; i++) {
1295                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1296                 dev->sio_bufs[i].v4lbuf.flags = 0;
1297         }
1298         spin_unlock_irqrestore(&dev->spinlock, flags);
1299         return 0;
1300 }
1301
1302
1303 static int stk_vidioc_g_parm(struct file *filp,
1304                 void *priv, struct v4l2_streamparm *sp)
1305 {
1306         if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1307                 return -EINVAL;
1308
1309         sp->parm.capture.capability = 0;
1310         sp->parm.capture.capturemode = 0;
1311         /*FIXME This is not correct */
1312         sp->parm.capture.timeperframe.numerator = 1;
1313         sp->parm.capture.timeperframe.denominator = 30;
1314         sp->parm.capture.readbuffers = 2;
1315         sp->parm.capture.extendedmode = 0;
1316         return 0;
1317 }
1318
1319 static struct file_operations v4l_stk_fops = {
1320         .owner = THIS_MODULE,
1321         .open = v4l_stk_open,
1322         .release = v4l_stk_release,
1323         .read = v4l_stk_read,
1324         .poll = v4l_stk_poll,
1325         .mmap = v4l_stk_mmap,
1326         .ioctl = video_ioctl2,
1327 #ifdef CONFIG_COMPAT
1328         .compat_ioctl = v4l_compat_ioctl32,
1329 #endif
1330         .llseek = no_llseek
1331 };
1332
1333 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1334         .vidioc_querycap = stk_vidioc_querycap,
1335         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1336         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1337         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1338         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1339         .vidioc_enum_input = stk_vidioc_enum_input,
1340         .vidioc_s_input = stk_vidioc_s_input,
1341         .vidioc_g_input = stk_vidioc_g_input,
1342         .vidioc_s_std = stk_vidioc_s_std,
1343         .vidioc_reqbufs = stk_vidioc_reqbufs,
1344         .vidioc_querybuf = stk_vidioc_querybuf,
1345         .vidioc_qbuf = stk_vidioc_qbuf,
1346         .vidioc_dqbuf = stk_vidioc_dqbuf,
1347         .vidioc_streamon = stk_vidioc_streamon,
1348         .vidioc_streamoff = stk_vidioc_streamoff,
1349         .vidioc_queryctrl = stk_vidioc_queryctrl,
1350         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1351         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1352         .vidioc_g_parm = stk_vidioc_g_parm,
1353 };
1354
1355 static void stk_v4l_dev_release(struct video_device *vd)
1356 {
1357 }
1358
1359 static struct video_device stk_v4l_data = {
1360         .name = "stkwebcam",
1361         .type = VFL_TYPE_GRABBER,
1362         .type2 = VID_TYPE_CAPTURE,
1363         .minor = -1,
1364         .tvnorms = V4L2_STD_UNKNOWN,
1365         .current_norm = V4L2_STD_UNKNOWN,
1366         .fops = &v4l_stk_fops,
1367         .ioctl_ops = &v4l_stk_ioctl_ops,
1368         .release = stk_v4l_dev_release,
1369 };
1370
1371
1372 static int stk_register_video_device(struct stk_camera *dev)
1373 {
1374         int err;
1375
1376         dev->vdev = stk_v4l_data;
1377         dev->vdev.debug = debug;
1378         dev->vdev.parent = &dev->interface->dev;
1379         dev->vdev.priv = dev;
1380         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1381         if (err)
1382                 STK_ERROR("v4l registration failed\n");
1383         else
1384                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1385                         " /dev/video%d\n", dev->vdev.minor);
1386         return err;
1387 }
1388
1389
1390 /* USB Stuff */
1391
1392 static int stk_camera_probe(struct usb_interface *interface,
1393                 const struct usb_device_id *id)
1394 {
1395         int i;
1396         int err;
1397
1398         struct stk_camera *dev = NULL;
1399         struct usb_device *udev = interface_to_usbdev(interface);
1400         struct usb_host_interface *iface_desc;
1401         struct usb_endpoint_descriptor *endpoint;
1402
1403         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1404         if (dev == NULL) {
1405                 STK_ERROR("Out of memory !\n");
1406                 return -ENOMEM;
1407         }
1408
1409         kref_init(&dev->kref);
1410         spin_lock_init(&dev->spinlock);
1411         init_waitqueue_head(&dev->wait_frame);
1412
1413         dev->udev = udev;
1414         dev->interface = interface;
1415         usb_get_intf(interface);
1416
1417         dev->vsettings.vflip = vflip;
1418         dev->vsettings.hflip = hflip;
1419         dev->n_sbufs = 0;
1420         set_present(dev);
1421
1422         /* Set up the endpoint information
1423          * use only the first isoc-in endpoint
1424          * for the current alternate setting */
1425         iface_desc = interface->cur_altsetting;
1426
1427         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1428                 endpoint = &iface_desc->endpoint[i].desc;
1429
1430                 if (!dev->isoc_ep
1431                         && ((endpoint->bEndpointAddress
1432                                 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1433                         && ((endpoint->bmAttributes
1434                                 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1435                         /* we found an isoc in endpoint */
1436                         dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1437                         break;
1438                 }
1439         }
1440         if (!dev->isoc_ep) {
1441                 STK_ERROR("Could not find isoc-in endpoint");
1442                 kref_put(&dev->kref, stk_camera_cleanup);
1443                 return -ENODEV;
1444         }
1445         dev->vsettings.brightness = 0x7fff;
1446         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1447         dev->vsettings.mode = MODE_VGA;
1448         dev->frame_size = 640 * 480 * 2;
1449
1450         INIT_LIST_HEAD(&dev->sio_avail);
1451         INIT_LIST_HEAD(&dev->sio_full);
1452
1453         usb_set_intfdata(interface, dev);
1454
1455         err = stk_register_video_device(dev);
1456         if (err) {
1457                 kref_put(&dev->kref, stk_camera_cleanup);
1458                 return err;
1459         }
1460
1461         stk_create_sysfs_files(&dev->vdev);
1462         usb_autopm_enable(dev->interface);
1463
1464         return 0;
1465 }
1466
1467 static void stk_camera_disconnect(struct usb_interface *interface)
1468 {
1469         struct stk_camera *dev = usb_get_intfdata(interface);
1470
1471         usb_set_intfdata(interface, NULL);
1472         unset_present(dev);
1473
1474         wake_up_interruptible(&dev->wait_frame);
1475         stk_remove_sysfs_files(&dev->vdev);
1476
1477         kref_put(&dev->kref, stk_camera_cleanup);
1478 }
1479
1480 #ifdef CONFIG_PM
1481 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1482 {
1483         struct stk_camera *dev = usb_get_intfdata(intf);
1484         if (is_streaming(dev)) {
1485                 stk_stop_stream(dev);
1486                 /* yes, this is ugly */
1487                 set_streaming(dev);
1488         }
1489         return 0;
1490 }
1491
1492 static int stk_camera_resume(struct usb_interface *intf)
1493 {
1494         struct stk_camera *dev = usb_get_intfdata(intf);
1495         if (!is_initialised(dev))
1496                 return 0;
1497         unset_initialised(dev);
1498         stk_initialise(dev);
1499         stk_setup_format(dev);
1500         if (is_streaming(dev))
1501                 stk_start_stream(dev);
1502         return 0;
1503 }
1504 #endif
1505
1506 static struct usb_driver stk_camera_driver = {
1507         .name = "stkwebcam",
1508         .probe = stk_camera_probe,
1509         .disconnect = stk_camera_disconnect,
1510         .id_table = stkwebcam_table,
1511 #ifdef CONFIG_PM
1512         .suspend = stk_camera_suspend,
1513         .resume = stk_camera_resume,
1514 #endif
1515 };
1516
1517
1518 static int __init stk_camera_init(void)
1519 {
1520         int result;
1521
1522         result = usb_register(&stk_camera_driver);
1523         if (result)
1524                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1525
1526
1527         return result;
1528 }
1529
1530 static void __exit stk_camera_exit(void)
1531 {
1532         usb_deregister(&stk_camera_driver);
1533 }
1534
1535 module_init(stk_camera_init);
1536 module_exit(stk_camera_exit);
1537
1538