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