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))
 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 inode *inode, 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         lock_kernel();
 676         if (dev == NULL || !is_present(dev)) {
 677                 unlock_kernel();
 678                 return -ENXIO;
 679         }
 680         fp->private_data = dev;
 681         usb_autopm_get_interface(dev->interface);
 682         unlock_kernel();
 683
 684         return 0;
 685 }
 686
 687 static int v4l_stk_release(struct inode *inode, struct file *fp)
 688 {
 689         struct stk_camera *dev = fp->private_data;
 690
 691         if (dev->owner != fp) {
 692                 usb_autopm_put_interface(dev->interface);
 693                 return 0;
 694         }
 695
 696         stk_stop_stream(dev);
 697
 698         stk_free_buffers(dev);
 699
 700         dev->owner = NULL;
 701
 702         usb_autopm_put_interface(dev->interface);
 703
 704         return 0;
 705 }
 706
 707 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 708                 size_t count, loff_t *f_pos)
 709 {
 710         int i;
 711         int ret;
 712         unsigned long flags;
 713         struct stk_sio_buffer *sbuf;
 714         struct stk_camera *dev = fp->private_data;
 715
 716         if (!is_present(dev))
 717                 return -EIO;
 718         if (dev->owner && dev->owner != fp)
 719                 return -EBUSY;
 720         dev->owner = fp;
 721         if (!is_streaming(dev)) {
 722                 if (stk_initialise(dev)
 723                         || stk_allocate_buffers(dev, 3)
 724                         || stk_start_stream(dev))
 725                         return -ENOMEM;
 726                 spin_lock_irqsave(&dev->spinlock, flags);
 727                 for (i = 0; i < dev->n_sbufs; i++) {
 728                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 729                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 730                 }
 731                 spin_unlock_irqrestore(&dev->spinlock, flags);
 732         }
 733         if (*f_pos == 0) {
 734                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 735                         return -EWOULDBLOCK;
 736                 ret = wait_event_interruptible(dev->wait_frame,
 737                         !list_empty(&dev->sio_full) || !is_present(dev));
 738                 if (ret)
 739                         return ret;
 740                 if (!is_present(dev))
 741                         return -EIO;
 742         }
 743         if (count + *f_pos > dev->frame_size)
 744                 count = dev->frame_size - *f_pos;
 745         spin_lock_irqsave(&dev->spinlock, flags);
 746         if (list_empty(&dev->sio_full)) {
 747                 spin_unlock_irqrestore(&dev->spinlock, flags);
 748                 STK_ERROR("BUG: No siobufs ready\n");
 749                 return 0;
 750         }
 751         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 752         spin_unlock_irqrestore(&dev->spinlock, flags);
 753
 754         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 755                 return -EFAULT;
 756
 757         *f_pos += count;
 758
 759         if (*f_pos >= dev->frame_size) {
 760                 *f_pos = 0;
 761                 spin_lock_irqsave(&dev->spinlock, flags);
 762                 list_move_tail(&sbuf->list, &dev->sio_avail);
 763                 spin_unlock_irqrestore(&dev->spinlock, flags);
 764         }
 765         return count;
 766 }
 767
 768 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 769 {
 770         struct stk_camera *dev = fp->private_data;
 771
 772         poll_wait(fp, &dev->wait_frame, wait);
 773
 774         if (!is_present(dev))
 775                 return POLLERR;
 776
 777         if (!list_empty(&dev->sio_full))
 778                 return (POLLIN | POLLRDNORM);
 779
 780         return 0;
 781 }
 782
 783
 784 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 785 {
 786         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 787         sbuf->mapcount++;
 788 }
 789 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 790 {
 791         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 792         sbuf->mapcount--;
 793         if (sbuf->mapcount == 0)
 794                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 795 }
 796 static struct vm_operations_struct stk_v4l_vm_ops = {
 797         .open = stk_v4l_vm_open,
 798         .close = stk_v4l_vm_close
 799 };
 800
 801 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 802 {
 803         unsigned int i;
 804         int ret;
 805         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 806         struct stk_camera *dev = fp->private_data;
 807         struct stk_sio_buffer *sbuf = NULL;
 808
 809         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 810                 return -EINVAL;
 811
 812         for (i = 0; i < dev->n_sbufs; i++) {
 813                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 814                         sbuf = dev->sio_bufs + i;
 815                         break;
 816                 }
 817         }
 818         if (sbuf == NULL)
 819                 return -EINVAL;
 820         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 821         if (ret)
 822                 return ret;
 823         vma->vm_flags |= VM_DONTEXPAND;
 824         vma->vm_private_data = sbuf;
 825         vma->vm_ops = &stk_v4l_vm_ops;
 826         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 827         stk_v4l_vm_open(vma);
 828         return 0;
 829 }
 830
 831 /* v4l ioctl handlers */
 832
 833 static int stk_vidioc_querycap(struct file *filp,
 834                 void *priv, struct v4l2_capability *cap)
 835 {
 836         strcpy(cap->driver, "stk");
 837         strcpy(cap->card, "stk");
 838         cap->version = DRIVER_VERSION_NUM;
 839
 840         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 841                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 842         return 0;
 843 }
 844
 845 static int stk_vidioc_enum_input(struct file *filp,
 846                 void *priv, struct v4l2_input *input)
 847 {
 848         if (input->index != 0)
 849                 return -EINVAL;
 850
 851         strcpy(input->name, "Syntek USB Camera");
 852         input->type = V4L2_INPUT_TYPE_CAMERA;
 853         return 0;
 854 }
 855
 856
 857 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 858 {
 859         *i = 0;
 860         return 0;
 861 }
 862
 863 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 864 {
 865         if (i != 0)
 866                 return -EINVAL;
 867         else
 868                 return 0;
 869 }
 870
 871 /* from vivi.c */
 872 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 873 {
 874         return 0;
 875 }
 876
 877 /* List of all V4Lv2 controls supported by the driver */
 878 static struct v4l2_queryctrl stk_controls[] = {
 879         {
 880                 .id      = V4L2_CID_BRIGHTNESS,
 881                 .type    = V4L2_CTRL_TYPE_INTEGER,
 882                 .name    = "Brightness",
 883                 .minimum = 0,
 884                 .maximum = 0xffff,
 885                 .step    = 0x0100,
 886                 .default_value = 0x6000,
 887         },
 888         /*TODO: get more controls to work */
 889 };
 890
 891 static int stk_vidioc_queryctrl(struct file *filp,
 892                 void *priv, struct v4l2_queryctrl *c)
 893 {
 894         int i;
 895         int nbr;
 896         nbr = ARRAY_SIZE(stk_controls);
 897
 898         for (i = 0; i < nbr; i++) {
 899                 if (stk_controls[i].id == c->id) {
 900                         memcpy(c, &stk_controls[i],
 901                                 sizeof(struct v4l2_queryctrl));
 902                         return 0;
 903                 }
 904         }
 905         return -EINVAL;
 906 }
 907
 908 static int stk_vidioc_g_ctrl(struct file *filp,
 909                 void *priv, struct v4l2_control *c)
 910 {
 911         struct stk_camera *dev = priv;
 912         switch (c->id) {
 913         case V4L2_CID_BRIGHTNESS:
 914                 c->value = dev->vsettings.brightness;
 915                 break;
 916         default:
 917                 return -EINVAL;
 918         }
 919         return 0;
 920 }
 921
 922 static int stk_vidioc_s_ctrl(struct file *filp,
 923                 void *priv, struct v4l2_control *c)
 924 {
 925         struct stk_camera *dev = priv;
 926         switch (c->id) {
 927         case V4L2_CID_BRIGHTNESS:
 928                 dev->vsettings.brightness = c->value;
 929                 return stk_sensor_set_brightness(dev, c->value >> 8);
 930         default:
 931                 return -EINVAL;
 932         }
 933         return 0;
 934 }
 935
 936
 937 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 938                 void *priv, struct v4l2_fmtdesc *fmtd)
 939 {
 940         fmtd->flags = 0;
 941
 942         switch (fmtd->index) {
 943         case 0:
 944                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 945                 strcpy(fmtd->description, "r5g6b5");
 946                 break;
 947         case 1:
 948                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 949                 strcpy(fmtd->description, "r5g6b5BE");
 950                 break;
 951         case 2:
 952                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 953                 strcpy(fmtd->description, "yuv4:2:2");
 954                 break;
 955         case 3:
 956                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 957                 strcpy(fmtd->description, "Raw bayer");
 958                 break;
 959         case 4:
 960                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 961                 strcpy(fmtd->description, "yuv4:2:2");
 962                 break;
 963         default:
 964                 return -EINVAL;
 965         }
 966         return 0;
 967 }
 968
 969 static struct stk_size {
 970         unsigned w;
 971         unsigned h;
 972         enum stk_mode m;
 973 } stk_sizes[] = {
 974         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 975         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 976         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 977         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 978         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 979 };
 980
 981 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 982                 void *priv, struct v4l2_format *f)
 983 {
 984         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 985         struct stk_camera *dev = priv;
 986         int i;
 987
 988         for (i = 0; i < ARRAY_SIZE(stk_sizes)
 989                         && stk_sizes[i].m != dev->vsettings.mode;
 990                 i++);
 991         if (i == ARRAY_SIZE(stk_sizes)) {
 992                 STK_ERROR("ERROR: mode invalid\n");
 993                 return -EINVAL;
 994         }
 995         pix_format->width = stk_sizes[i].w;
 996         pix_format->height = stk_sizes[i].h;
 997         pix_format->field = V4L2_FIELD_NONE;
 998         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 999         pix_format->priv = 0;
1000         pix_format->pixelformat = dev->vsettings.palette;
1001         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1002                 pix_format->bytesperline = pix_format->width;
1003         else
1004                 pix_format->bytesperline = 2 * pix_format->width;
1005         pix_format->sizeimage = pix_format->bytesperline
1006                                 * pix_format->height;
1007         return 0;
1008 }
1009
1010 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1011                 void *priv, struct v4l2_format *fmtd)
1012 {
1013         int i;
1014         switch (fmtd->fmt.pix.pixelformat) {
1015         case V4L2_PIX_FMT_RGB565:
1016         case V4L2_PIX_FMT_RGB565X:
1017         case V4L2_PIX_FMT_UYVY:
1018         case V4L2_PIX_FMT_YUYV:
1019         case V4L2_PIX_FMT_SBGGR8:
1020                 break;
1021         default:
1022                 return -EINVAL;
1023         }
1024         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1025                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1026                         break;
1027         }
1028         if (i == ARRAY_SIZE(stk_sizes)
1029                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1030                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1031                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1032                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1033                 fmtd->fmt.pix.priv = i - 1;
1034         } else {
1035                 fmtd->fmt.pix.height = stk_sizes[i].h;
1036                 fmtd->fmt.pix.width = stk_sizes[i].w;
1037                 fmtd->fmt.pix.priv = i;
1038         }
1039
1040         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1041         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1042         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1043                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1044         else
1045                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1046         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1047                 * fmtd->fmt.pix.height;
1048         return 0;
1049 }
1050
1051 static int stk_setup_format(struct stk_camera *dev)
1052 {
1053         int i = 0;
1054         int depth;
1055         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1056                 depth = 1;
1057         else
1058                 depth = 2;
1059         while (stk_sizes[i].m != dev->vsettings.mode
1060                         && i < ARRAY_SIZE(stk_sizes))
1061                 i++;
1062         if (i == ARRAY_SIZE(stk_sizes)) {
1063                 STK_ERROR("Something is broken in %s\n", __func__);
1064                 return -EFAULT;
1065         }
1066         /* This registers controls some timings, not sure of what. */
1067         stk_camera_write_reg(dev, 0x001b, 0x0e);
1068         if (dev->vsettings.mode == MODE_SXGA)
1069                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1070         else
1071                 stk_camera_write_reg(dev, 0x001c, 0x46);
1072         /*
1073          * Registers 0x0115 0x0114 are the size of each line (bytes),
1074          * regs 0x0117 0x0116 are the heigth of the image.
1075          */
1076         stk_camera_write_reg(dev, 0x0115,
1077                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1078         stk_camera_write_reg(dev, 0x0114,
1079                 (stk_sizes[i].w * depth) & 0xff);
1080         stk_camera_write_reg(dev, 0x0117,
1081                 (stk_sizes[i].h >> 8) & 0xff);
1082         stk_camera_write_reg(dev, 0x0116,
1083                 stk_sizes[i].h & 0xff);
1084         return stk_sensor_configure(dev);
1085 }
1086
1087 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1088                 void *priv, struct v4l2_format *fmtd)
1089 {
1090         int ret;
1091         struct stk_camera *dev = priv;
1092
1093         if (dev == NULL)
1094                 return -ENODEV;
1095         if (!is_present(dev))
1096                 return -ENODEV;
1097         if (is_streaming(dev))
1098                 return -EBUSY;
1099         if (dev->owner && dev->owner != filp)
1100                 return -EBUSY;
1101         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1102         if (ret)
1103                 return ret;
1104         dev->owner = filp;
1105
1106         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1107         stk_free_buffers(dev);
1108         dev->frame_size = fmtd->fmt.pix.sizeimage;
1109         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1110
1111         stk_initialise(dev);
1112         return stk_setup_format(dev);
1113 }
1114
1115 static int stk_vidioc_reqbufs(struct file *filp,
1116                 void *priv, struct v4l2_requestbuffers *rb)
1117 {
1118         struct stk_camera *dev = priv;
1119
1120         if (dev == NULL)
1121                 return -ENODEV;
1122         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1123                 return -EINVAL;
1124         if (rb->memory != V4L2_MEMORY_MMAP)
1125                 return -EINVAL;
1126         if (is_streaming(dev)
1127                 || (dev->owner && dev->owner != filp))
1128                 return -EBUSY;
1129         dev->owner = filp;
1130
1131         /*FIXME If they ask for zero, we must stop streaming and free */
1132         if (rb->count < 3)
1133                 rb->count = 3;
1134         /* Arbitrary limit */
1135         else if (rb->count > 5)
1136                 rb->count = 5;
1137
1138         stk_allocate_buffers(dev, rb->count);
1139         rb->count = dev->n_sbufs;
1140         return 0;
1141 }
1142
1143 static int stk_vidioc_querybuf(struct file *filp,
1144                 void *priv, struct v4l2_buffer *buf)
1145 {
1146         int index;
1147         struct stk_camera *dev = priv;
1148         struct stk_sio_buffer *sbuf;
1149
1150         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1151                 return -EINVAL;
1152
1153         index = buf->index;
1154
1155         if (index < 0 || index >= dev->n_sbufs)
1156                 return -EINVAL;
1157         sbuf = dev->sio_bufs + buf->index;
1158         *buf = sbuf->v4lbuf;
1159         return 0;
1160 }
1161
1162 static int stk_vidioc_qbuf(struct file *filp,
1163                 void *priv, struct v4l2_buffer *buf)
1164 {
1165         struct stk_camera *dev = priv;
1166         struct stk_sio_buffer *sbuf;
1167         unsigned long flags;
1168         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1169                 return -EINVAL;
1170
1171         if (buf->memory != V4L2_MEMORY_MMAP)
1172                 return -EINVAL;
1173
1174         if (buf->index < 0 || buf->index >= dev->n_sbufs)
1175                 return -EINVAL;
1176         sbuf = dev->sio_bufs + buf->index;
1177         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1178                 return 0;
1179         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1180         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1181         spin_lock_irqsave(&dev->spinlock, flags);
1182         list_add_tail(&sbuf->list, &dev->sio_avail);
1183         *buf = sbuf->v4lbuf;
1184         spin_unlock_irqrestore(&dev->spinlock, flags);
1185         return 0;
1186 }
1187
1188 static int stk_vidioc_dqbuf(struct file *filp,
1189                 void *priv, struct v4l2_buffer *buf)
1190 {
1191         struct stk_camera *dev = priv;
1192         struct stk_sio_buffer *sbuf;
1193         unsigned long flags;
1194         int ret;
1195
1196         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1197                 || !is_streaming(dev))
1198                 return -EINVAL;
1199
1200         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1201                 return -EWOULDBLOCK;
1202         ret = wait_event_interruptible(dev->wait_frame,
1203                 !list_empty(&dev->sio_full) || !is_present(dev));
1204         if (ret)
1205                 return ret;
1206         if (!is_present(dev))
1207                 return -EIO;
1208
1209         spin_lock_irqsave(&dev->spinlock, flags);
1210         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1211         list_del_init(&sbuf->list);
1212         spin_unlock_irqrestore(&dev->spinlock, flags);
1213         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1214         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1215         sbuf->v4lbuf.sequence = ++dev->sequence;
1216         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1217
1218         *buf = sbuf->v4lbuf;
1219         return 0;
1220 }
1221
1222 static int stk_vidioc_streamon(struct file *filp,
1223                 void *priv, enum v4l2_buf_type type)
1224 {
1225         struct stk_camera *dev = priv;
1226         if (is_streaming(dev))
1227                 return 0;
1228         if (dev->sio_bufs == NULL)
1229                 return -EINVAL;
1230         dev->sequence = 0;
1231         return stk_start_stream(dev);
1232 }
1233
1234 static int stk_vidioc_streamoff(struct file *filp,
1235                 void *priv, enum v4l2_buf_type type)
1236 {
1237         struct stk_camera *dev = priv;
1238         unsigned long flags;
1239         int i;
1240         stk_stop_stream(dev);
1241         spin_lock_irqsave(&dev->spinlock, flags);
1242         INIT_LIST_HEAD(&dev->sio_avail);
1243         INIT_LIST_HEAD(&dev->sio_full);
1244         for (i = 0; i < dev->n_sbufs; i++) {
1245                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1246                 dev->sio_bufs[i].v4lbuf.flags = 0;
1247         }
1248         spin_unlock_irqrestore(&dev->spinlock, flags);
1249         return 0;
1250 }
1251
1252
1253 static int stk_vidioc_g_parm(struct file *filp,
1254                 void *priv, struct v4l2_streamparm *sp)
1255 {
1256         if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1257                 return -EINVAL;
1258
1259         sp->parm.capture.capability = 0;
1260         sp->parm.capture.capturemode = 0;
1261         /*FIXME This is not correct */
1262         sp->parm.capture.timeperframe.numerator = 1;
1263         sp->parm.capture.timeperframe.denominator = 30;
1264         sp->parm.capture.readbuffers = 2;
1265         sp->parm.capture.extendedmode = 0;
1266         return 0;
1267 }
1268
1269 static struct file_operations v4l_stk_fops = {
1270         .owner = THIS_MODULE,
1271         .open = v4l_stk_open,
1272         .release = v4l_stk_release,
1273         .read = v4l_stk_read,
1274         .poll = v4l_stk_poll,
1275         .mmap = v4l_stk_mmap,
1276         .ioctl = video_ioctl2,
1277 #ifdef CONFIG_COMPAT
1278         .compat_ioctl = v4l_compat_ioctl32,
1279 #endif
1280         .llseek = no_llseek
1281 };
1282
1283 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1284         .vidioc_querycap = stk_vidioc_querycap,
1285         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1286         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1287         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1288         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1289         .vidioc_enum_input = stk_vidioc_enum_input,
1290         .vidioc_s_input = stk_vidioc_s_input,
1291         .vidioc_g_input = stk_vidioc_g_input,
1292         .vidioc_s_std = stk_vidioc_s_std,
1293         .vidioc_reqbufs = stk_vidioc_reqbufs,
1294         .vidioc_querybuf = stk_vidioc_querybuf,
1295         .vidioc_qbuf = stk_vidioc_qbuf,
1296         .vidioc_dqbuf = stk_vidioc_dqbuf,
1297         .vidioc_streamon = stk_vidioc_streamon,
1298         .vidioc_streamoff = stk_vidioc_streamoff,
1299         .vidioc_queryctrl = stk_vidioc_queryctrl,
1300         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1301         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1302         .vidioc_g_parm = stk_vidioc_g_parm,
1303 };
1304
1305 static void stk_v4l_dev_release(struct video_device *vd)
1306 {
1307         struct stk_camera *dev = vdev_to_camera(vd);
1308
1309         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1310                 STK_ERROR("We are leaking memory\n");
1311         usb_put_intf(dev->interface);
1312         kfree(dev);
1313 }
1314
1315 static struct video_device stk_v4l_data = {
1316         .name = "stkwebcam",
1317         .minor = -1,
1318         .tvnorms = V4L2_STD_UNKNOWN,
1319         .current_norm = V4L2_STD_UNKNOWN,
1320         .fops = &v4l_stk_fops,
1321         .ioctl_ops = &v4l_stk_ioctl_ops,
1322         .release = stk_v4l_dev_release,
1323 };
1324
1325
1326 static int stk_register_video_device(struct stk_camera *dev)
1327 {
1328         int err;
1329
1330         dev->vdev = stk_v4l_data;
1331         dev->vdev.debug = debug;
1332         dev->vdev.parent = &dev->interface->dev;
1333         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1334         if (err)
1335                 STK_ERROR("v4l registration failed\n");
1336         else
1337                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1338                         " /dev/video%d\n", dev->vdev.minor);
1339         return err;
1340 }
1341
1342
1343 /* USB Stuff */
1344
1345 static int stk_camera_probe(struct usb_interface *interface,
1346                 const struct usb_device_id *id)
1347 {
1348         int i;
1349         int err = 0;
1350
1351         struct stk_camera *dev = NULL;
1352         struct usb_device *udev = interface_to_usbdev(interface);
1353         struct usb_host_interface *iface_desc;
1354         struct usb_endpoint_descriptor *endpoint;
1355
1356         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1357         if (dev == NULL) {
1358                 STK_ERROR("Out of memory !\n");
1359                 return -ENOMEM;
1360         }
1361
1362         spin_lock_init(&dev->spinlock);
1363         init_waitqueue_head(&dev->wait_frame);
1364
1365         dev->udev = udev;
1366         dev->interface = interface;
1367         usb_get_intf(interface);
1368
1369         dev->vsettings.vflip = vflip;
1370         dev->vsettings.hflip = hflip;
1371         dev->n_sbufs = 0;
1372         set_present(dev);
1373
1374         /* Set up the endpoint information
1375          * use only the first isoc-in endpoint
1376          * for the current alternate setting */
1377         iface_desc = interface->cur_altsetting;
1378
1379         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1380                 endpoint = &iface_desc->endpoint[i].desc;
1381
1382                 if (!dev->isoc_ep
1383                         && ((endpoint->bEndpointAddress
1384                                 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1385                         && ((endpoint->bmAttributes
1386                                 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1387                         /* we found an isoc in endpoint */
1388                         dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1389                         break;
1390                 }
1391         }
1392         if (!dev->isoc_ep) {
1393                 STK_ERROR("Could not find isoc-in endpoint");
1394                 err = -ENODEV;
1395                 goto error;
1396         }
1397         dev->vsettings.brightness = 0x7fff;
1398         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1399         dev->vsettings.mode = MODE_VGA;
1400         dev->frame_size = 640 * 480 * 2;
1401
1402         INIT_LIST_HEAD(&dev->sio_avail);
1403         INIT_LIST_HEAD(&dev->sio_full);
1404
1405         usb_set_intfdata(interface, dev);
1406
1407         err = stk_register_video_device(dev);
1408         if (err) {
1409                 goto error;
1410         }
1411
1412         stk_create_sysfs_files(&dev->vdev);
1413         usb_autopm_enable(dev->interface);
1414
1415         return 0;
1416
1417 error:
1418         kfree(dev);
1419         return err;
1420 }
1421
1422 static void stk_camera_disconnect(struct usb_interface *interface)
1423 {
1424         struct stk_camera *dev = usb_get_intfdata(interface);
1425
1426         usb_set_intfdata(interface, NULL);
1427         unset_present(dev);
1428
1429         wake_up_interruptible(&dev->wait_frame);
1430         stk_remove_sysfs_files(&dev->vdev);
1431
1432         STK_INFO("Syntek USB2.0 Camera release resources "
1433                 "video device /dev/video%d\n", dev->vdev.minor);
1434
1435         video_unregister_device(&dev->vdev);
1436 }
1437
1438 #ifdef CONFIG_PM
1439 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1440 {
1441         struct stk_camera *dev = usb_get_intfdata(intf);
1442         if (is_streaming(dev)) {
1443                 stk_stop_stream(dev);
1444                 /* yes, this is ugly */
1445                 set_streaming(dev);
1446         }
1447         return 0;
1448 }
1449
1450 static int stk_camera_resume(struct usb_interface *intf)
1451 {
1452         struct stk_camera *dev = usb_get_intfdata(intf);
1453         if (!is_initialised(dev))
1454                 return 0;
1455         unset_initialised(dev);
1456         stk_initialise(dev);
1457         stk_setup_format(dev);
1458         if (is_streaming(dev))
1459                 stk_start_stream(dev);
1460         return 0;
1461 }
1462 #endif
1463
1464 static struct usb_driver stk_camera_driver = {
1465         .name = "stkwebcam",
1466         .probe = stk_camera_probe,
1467         .disconnect = stk_camera_disconnect,
1468         .id_table = stkwebcam_table,
1469 #ifdef CONFIG_PM
1470         .suspend = stk_camera_suspend,
1471         .resume = stk_camera_resume,
1472 #endif
1473 };
1474
1475
1476 static int __init stk_camera_init(void)
1477 {
1478         int result;
1479
1480         result = usb_register(&stk_camera_driver);
1481         if (result)
1482                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1483
1484
1485         return result;
1486 }
1487
1488 static void __exit stk_camera_exit(void)
1489 {
1490         usb_deregister(&stk_camera_driver);
1491 }
1492
1493 module_init(stk_camera_init);
1494 module_exit(stk_camera_exit);
1495
1496