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 /* bool for webcam LED management */
  59 int first_init = 1;
  60
  61 /* Some cameras have audio interfaces, we aren't interested in those */
  62 static struct usb_device_id stkwebcam_table[] = {
  63         { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
  64         { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
  65         { }
  66 };
  67 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
  68
  69 /*
  70  * Basic stuff
  71  */
  72 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
  73 {
  74         struct usb_device *udev = dev->udev;
  75         int ret;
  76
  77         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  78                         0x01,
  79                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  80                         value,
  81                         index,
  82                         NULL,
  83                         0,
  84                         500);
  85         if (ret < 0)
  86                 return ret;
  87         else
  88                 return 0;
  89 }
  90
  91 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
  92 {
  93         struct usb_device *udev = dev->udev;
  94         int ret;
  95
  96         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  97                         0x00,
  98                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  99                         0x00,
 100                         index,
 101                         (u8 *) value,
 102                         sizeof(u8),
 103                         500);
 104         if (ret < 0)
 105                 return ret;
 106         else
 107                 return 0;
 108 }
 109
 110 static int stk_start_stream(struct stk_camera *dev)
 111 {
 112         int value;
 113         int i, ret;
 114         int value_116, value_117;
 115
 116         if (!is_present(dev))
 117                 return -ENODEV;
 118         if (!is_memallocd(dev) || !is_initialised(dev)) {
 119                 STK_ERROR("FIXME: Buffers are not allocated\n");
 120                 return -EFAULT;
 121         }
 122         ret = usb_set_interface(dev->udev, 0, 5);
 123
 124         if (ret < 0)
 125                 STK_ERROR("usb_set_interface failed !\n");
 126         if (stk_sensor_wakeup(dev))
 127                 STK_ERROR("error awaking the sensor\n");
 128
 129         stk_camera_read_reg(dev, 0x0116, &value_116);
 130         stk_camera_read_reg(dev, 0x0117, &value_117);
 131
 132         stk_camera_write_reg(dev, 0x0116, 0x0000);
 133         stk_camera_write_reg(dev, 0x0117, 0x0000);
 134
 135         stk_camera_read_reg(dev, 0x0100, &value);
 136         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 137
 138         stk_camera_write_reg(dev, 0x0116, value_116);
 139         stk_camera_write_reg(dev, 0x0117, value_117);
 140         for (i = 0; i < MAX_ISO_BUFS; i++) {
 141                 if (dev->isobufs[i].urb) {
 142                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 143                         atomic_inc(&dev->urbs_used);
 144                         if (ret)
 145                                 return ret;
 146                 }
 147         }
 148         set_streaming(dev);
 149         return 0;
 150 }
 151
 152 static int stk_stop_stream(struct stk_camera *dev)
 153 {
 154         int value;
 155         int i;
 156         if (is_present(dev)) {
 157                 stk_camera_read_reg(dev, 0x0100, &value);
 158                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 159                 if (dev->isobufs != NULL) {
 160                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 161                                 if (dev->isobufs[i].urb)
 162                                         usb_kill_urb(dev->isobufs[i].urb);
 163                         }
 164                 }
 165                 unset_streaming(dev);
 166
 167                 if (usb_set_interface(dev->udev, 0, 0))
 168                         STK_ERROR("usb_set_interface failed !\n");
 169                 if (stk_sensor_sleep(dev))
 170                         STK_ERROR("error suspending the sensor\n");
 171         }
 172         return 0;
 173 }
 174
 175 /*
 176  * This seems to be the shortest init sequence we
 177  * must do in order to find the sensor
 178  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 179  * is also reset. Maybe powers down it?
 180  * Rest of values don't make a difference
 181  */
 182
 183 static struct regval stk1125_initvals[] = {
 184         /*TODO: What means this sequence? */
 185         {0x0000, 0x24},
 186         {0x0100, 0x21},
 187         {0x0002, 0x68},
 188         {0x0003, 0x80},
 189         {0x0005, 0x00},
 190         {0x0007, 0x03},
 191         {0x000d, 0x00},
 192         {0x000f, 0x02},
 193         {0x0300, 0x12},
 194         {0x0350, 0x41},
 195         {0x0351, 0x00},
 196         {0x0352, 0x00},
 197         {0x0353, 0x00},
 198         {0x0018, 0x10},
 199         {0x0019, 0x00},
 200         {0x001b, 0x0e},
 201         {0x001c, 0x46},
 202         {0x0300, 0x80},
 203         {0x001a, 0x04},
 204         {0x0110, 0x00},
 205         {0x0111, 0x00},
 206         {0x0112, 0x00},
 207         {0x0113, 0x00},
 208
 209         {0xffff, 0xff},
 210 };
 211
 212
 213 static int stk_initialise(struct stk_camera *dev)
 214 {
 215         struct regval *rv;
 216         int ret;
 217         if (!is_present(dev))
 218                 return -ENODEV;
 219         if (is_initialised(dev))
 220                 return 0;
 221         rv = stk1125_initvals;
 222         while (rv->reg != 0xffff) {
 223                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 224                 if (ret)
 225                         return ret;
 226                 rv++;
 227         }
 228         if (stk_sensor_init(dev) == 0) {
 229                 set_initialised(dev);
 230                 return 0;
 231         } else
 232                 return -1;
 233 }
 234
 235 /* *********************************************** */
 236 /*
 237  * This function is called as an URB transfert is complete (Isochronous pipe).
 238  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 239  * and not stall. Neat.
 240  */
 241 static void stk_isoc_handler(struct urb *urb)
 242 {
 243         int i;
 244         int ret;
 245         int framelen;
 246         unsigned long flags;
 247
 248         unsigned char *fill = NULL;
 249         unsigned char *iso_buf = NULL;
 250
 251         struct stk_camera *dev;
 252         struct stk_sio_buffer *fb;
 253
 254         dev = (struct stk_camera *) urb->context;
 255
 256         if (dev == NULL) {
 257                 STK_ERROR("isoc_handler called with NULL device !\n");
 258                 return;
 259         }
 260
 261         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 262                 || urb->status == -ESHUTDOWN) {
 263                 atomic_dec(&dev->urbs_used);
 264                 return;
 265         }
 266
 267         spin_lock_irqsave(&dev->spinlock, flags);
 268
 269         if (urb->status != -EINPROGRESS && urb->status != 0) {
 270                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 271                 goto resubmit;
 272         }
 273
 274         if (list_empty(&dev->sio_avail)) {
 275                 /*FIXME Stop streaming after a while */
 276                 (void) (printk_ratelimit() &&
 277                 STK_ERROR("isoc_handler without available buffer!\n"));
 278                 goto resubmit;
 279         }
 280         fb = list_first_entry(&dev->sio_avail,
 281                         struct stk_sio_buffer, list);
 282         fill = fb->buffer + fb->v4lbuf.bytesused;
 283
 284         for (i = 0; i < urb->number_of_packets; i++) {
 285                 if (urb->iso_frame_desc[i].status != 0) {
 286                         if (urb->iso_frame_desc[i].status != -EXDEV)
 287                                 STK_ERROR("Frame %d has error %d\n", i,
 288                                         urb->iso_frame_desc[i].status);
 289                         continue;
 290                 }
 291                 framelen = urb->iso_frame_desc[i].actual_length;
 292                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 293
 294                 if (framelen <= 4)
 295                         continue; /* no data */
 296
 297                 /*
 298                  * we found something informational from there
 299                  * the isoc frames have to type of headers
 300                  * type1: 00 xx 00 00 or 20 xx 00 00
 301                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 302                  * xx is a sequencer which has never been seen over 0x3f
 303                  * imho data written down looks like bayer, i see similarities
 304                  * after every 640 bytes
 305                  */
 306                 if (*iso_buf & 0x80) {
 307                         framelen -= 8;
 308                         iso_buf += 8;
 309                         /* This marks a new frame */
 310                         if (fb->v4lbuf.bytesused != 0
 311                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 312                                 (void) (printk_ratelimit() &&
 313                                 STK_ERROR("frame %d, "
 314                                         "bytesused=%d, skipping\n",
 315                                         i, fb->v4lbuf.bytesused));
 316                                 fb->v4lbuf.bytesused = 0;
 317                                 fill = fb->buffer;
 318                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 319                                 if (list_is_singular(&dev->sio_avail)) {
 320                                         /* Always reuse the last buffer */
 321                                         fb->v4lbuf.bytesused = 0;
 322                                         fill = fb->buffer;
 323                                 } else {
 324                                         list_move_tail(dev->sio_avail.next,
 325                                                 &dev->sio_full);
 326                                         wake_up(&dev->wait_frame);
 327                                         fb = list_first_entry(&dev->sio_avail,
 328                                                 struct stk_sio_buffer, list);
 329                                         fb->v4lbuf.bytesused = 0;
 330                                         fill = fb->buffer;
 331                                 }
 332                         }
 333                 } else {
 334                         framelen -= 4;
 335                         iso_buf += 4;
 336                 }
 337
 338                 /* Our buffer is full !!! */
 339                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 340                         (void) (printk_ratelimit() &&
 341                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 342                         /*FIXME Do something here? */
 343                         continue;
 344                 }
 345                 spin_unlock_irqrestore(&dev->spinlock, flags);
 346                 memcpy(fill, iso_buf, framelen);
 347                 spin_lock_irqsave(&dev->spinlock, flags);
 348                 fill += framelen;
 349
 350                 /* New size of our buffer */
 351                 fb->v4lbuf.bytesused += framelen;
 352         }
 353
 354 resubmit:
 355         spin_unlock_irqrestore(&dev->spinlock, flags);
 356         urb->dev = dev->udev;
 357         ret = usb_submit_urb(urb, GFP_ATOMIC);
 358         if (ret != 0) {
 359                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 360                         ret);
 361         }
 362 }
 363
 364 /* -------------------------------------------- */
 365
 366 static int stk_prepare_iso(struct stk_camera *dev)
 367 {
 368         void *kbuf;
 369         int i, j;
 370         struct urb *urb;
 371         struct usb_device *udev;
 372
 373         if (dev == NULL)
 374                 return -ENXIO;
 375         udev = dev->udev;
 376
 377         if (dev->isobufs)
 378                 STK_ERROR("isobufs already allocated. Bad\n");
 379         else
 380                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
 381                                         GFP_KERNEL);
 382         if (dev->isobufs == NULL) {
 383                 STK_ERROR("Unable to allocate iso buffers\n");
 384                 return -ENOMEM;
 385         }
 386         for (i = 0; i < MAX_ISO_BUFS; i++) {
 387                 if (dev->isobufs[i].data == NULL) {
 388                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 389                         if (kbuf == NULL) {
 390                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 391                                         i);
 392                                 goto isobufs_out;
 393                         }
 394                         dev->isobufs[i].data = kbuf;
 395                 } else
 396                         STK_ERROR("isobuf data already allocated\n");
 397                 if (dev->isobufs[i].urb == NULL) {
 398                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 399                         if (urb == NULL) {
 400                                 STK_ERROR("Failed to allocate URB %d\n", i);
 401                                 goto isobufs_out;
 402                         }
 403                         dev->isobufs[i].urb = urb;
 404                 } else {
 405                         STK_ERROR("Killing URB\n");
 406                         usb_kill_urb(dev->isobufs[i].urb);
 407                         urb = dev->isobufs[i].urb;
 408                 }
 409                 urb->interval = 1;
 410                 urb->dev = udev;
 411                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 412                 urb->transfer_flags = URB_ISO_ASAP;
 413                 urb->transfer_buffer = dev->isobufs[i].data;
 414                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 415                 urb->complete = stk_isoc_handler;
 416                 urb->context = dev;
 417                 urb->start_frame = 0;
 418                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 419
 420                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 421                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 422                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 423                 }
 424         }
 425         set_memallocd(dev);
 426         return 0;
 427
 428 isobufs_out:
 429         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 430                 kfree(dev->isobufs[i].data);
 431         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 432                 usb_free_urb(dev->isobufs[i].urb);
 433         kfree(dev->isobufs);
 434         dev->isobufs = NULL;
 435         return -ENOMEM;
 436 }
 437
 438 static void stk_clean_iso(struct stk_camera *dev)
 439 {
 440         int i;
 441
 442         if (dev == NULL || dev->isobufs == NULL)
 443                 return;
 444
 445         for (i = 0; i < MAX_ISO_BUFS; i++) {
 446                 struct urb *urb;
 447
 448                 urb = dev->isobufs[i].urb;
 449                 if (urb) {
 450                         if (atomic_read(&dev->urbs_used) && is_present(dev))
 451                                 usb_kill_urb(urb);
 452                         usb_free_urb(urb);
 453                 }
 454                 kfree(dev->isobufs[i].data);
 455         }
 456         kfree(dev->isobufs);
 457         dev->isobufs = NULL;
 458         unset_memallocd(dev);
 459 }
 460
 461 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 462 {
 463         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 464         INIT_LIST_HEAD(&buf->list);
 465         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 466         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 467         if (buf->buffer == NULL)
 468                 return -ENOMEM;
 469         buf->mapcount = 0;
 470         buf->dev = dev;
 471         buf->v4lbuf.index = index;
 472         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 473         buf->v4lbuf.field = V4L2_FIELD_NONE;
 474         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 475         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 476         return 0;
 477 }
 478
 479 static int stk_free_sio_buffers(struct stk_camera *dev)
 480 {
 481         int i;
 482         int nbufs;
 483         unsigned long flags;
 484         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 485                 return 0;
 486         /*
 487         * If any buffers are mapped, we cannot free them at all.
 488         */
 489         for (i = 0; i < dev->n_sbufs; i++) {
 490                 if (dev->sio_bufs[i].mapcount > 0)
 491                         return -EBUSY;
 492         }
 493         /*
 494         * OK, let's do it.
 495         */
 496         spin_lock_irqsave(&dev->spinlock, flags);
 497         INIT_LIST_HEAD(&dev->sio_avail);
 498         INIT_LIST_HEAD(&dev->sio_full);
 499         nbufs = dev->n_sbufs;
 500         dev->n_sbufs = 0;
 501         spin_unlock_irqrestore(&dev->spinlock, flags);
 502         for (i = 0; i < nbufs; i++) {
 503                 if (dev->sio_bufs[i].buffer != NULL)
 504                         vfree(dev->sio_bufs[i].buffer);
 505         }
 506         kfree(dev->sio_bufs);
 507         dev->sio_bufs = NULL;
 508         return 0;
 509 }
 510
 511 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 512 {
 513         int i;
 514         if (dev->sio_bufs != NULL)
 515                 STK_ERROR("sio_bufs already allocated\n");
 516         else {
 517                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 518                                 GFP_KERNEL);
 519                 if (dev->sio_bufs == NULL)
 520                         return -ENOMEM;
 521                 for (i = 0; i < n_sbufs; i++) {
 522                         if (stk_setup_siobuf(dev, i))
 523                                 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
 524                         dev->n_sbufs = i+1;
 525                 }
 526         }
 527         return 0;
 528 }
 529
 530 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 531 {
 532         int err;
 533         err = stk_prepare_iso(dev);
 534         if (err) {
 535                 stk_clean_iso(dev);
 536                 return err;
 537         }
 538         err = stk_prepare_sio_buffers(dev, n_sbufs);
 539         if (err) {
 540                 stk_free_sio_buffers(dev);
 541                 return err;
 542         }
 543         return 0;
 544 }
 545
 546 static void stk_free_buffers(struct stk_camera *dev)
 547 {
 548         stk_clean_iso(dev);
 549         stk_free_sio_buffers(dev);
 550 }
 551 /* -------------------------------------------- */
 552
 553 /* v4l file operations */
 554
 555 static int v4l_stk_open(struct file *fp)
 556 {
 557         struct stk_camera *dev;
 558         struct video_device *vdev;
 559
 560         vdev = video_devdata(fp);
 561         dev = vdev_to_camera(vdev);
 562
 563         if (dev == NULL || !is_present(dev))
 564                 return -ENXIO;
 565
 566         if (!first_init)
 567                 stk_camera_write_reg(dev, 0x0, 0x24);
 568         else
 569                 first_init = 0;
 570
 571         fp->private_data = dev;
 572         usb_autopm_get_interface(dev->interface);
 573
 574         return 0;
 575 }
 576
 577 static int v4l_stk_release(struct file *fp)
 578 {
 579         struct stk_camera *dev = fp->private_data;
 580
 581         if (dev->owner == fp) {
 582                 stk_stop_stream(dev);
 583                 stk_free_buffers(dev);
 584                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
 585                 unset_initialised(dev);
 586                 dev->owner = NULL;
 587         }
 588
 589         if (is_present(dev))
 590                 usb_autopm_put_interface(dev->interface);
 591
 592         return 0;
 593 }
 594
 595 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 596                 size_t count, loff_t *f_pos)
 597 {
 598         int i;
 599         int ret;
 600         unsigned long flags;
 601         struct stk_sio_buffer *sbuf;
 602         struct stk_camera *dev = fp->private_data;
 603
 604         if (!is_present(dev))
 605                 return -EIO;
 606         if (dev->owner && dev->owner != fp)
 607                 return -EBUSY;
 608         dev->owner = fp;
 609         if (!is_streaming(dev)) {
 610                 if (stk_initialise(dev)
 611                         || stk_allocate_buffers(dev, 3)
 612                         || stk_start_stream(dev))
 613                         return -ENOMEM;
 614                 spin_lock_irqsave(&dev->spinlock, flags);
 615                 for (i = 0; i < dev->n_sbufs; i++) {
 616                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 617                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 618                 }
 619                 spin_unlock_irqrestore(&dev->spinlock, flags);
 620         }
 621         if (*f_pos == 0) {
 622                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 623                         return -EWOULDBLOCK;
 624                 ret = wait_event_interruptible(dev->wait_frame,
 625                         !list_empty(&dev->sio_full) || !is_present(dev));
 626                 if (ret)
 627                         return ret;
 628                 if (!is_present(dev))
 629                         return -EIO;
 630         }
 631         if (count + *f_pos > dev->frame_size)
 632                 count = dev->frame_size - *f_pos;
 633         spin_lock_irqsave(&dev->spinlock, flags);
 634         if (list_empty(&dev->sio_full)) {
 635                 spin_unlock_irqrestore(&dev->spinlock, flags);
 636                 STK_ERROR("BUG: No siobufs ready\n");
 637                 return 0;
 638         }
 639         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 640         spin_unlock_irqrestore(&dev->spinlock, flags);
 641
 642         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 643                 return -EFAULT;
 644
 645         *f_pos += count;
 646
 647         if (*f_pos >= dev->frame_size) {
 648                 *f_pos = 0;
 649                 spin_lock_irqsave(&dev->spinlock, flags);
 650                 list_move_tail(&sbuf->list, &dev->sio_avail);
 651                 spin_unlock_irqrestore(&dev->spinlock, flags);
 652         }
 653         return count;
 654 }
 655
 656 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 657 {
 658         struct stk_camera *dev = fp->private_data;
 659
 660         poll_wait(fp, &dev->wait_frame, wait);
 661
 662         if (!is_present(dev))
 663                 return POLLERR;
 664
 665         if (!list_empty(&dev->sio_full))
 666                 return POLLIN | POLLRDNORM;
 667
 668         return 0;
 669 }
 670
 671
 672 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 673 {
 674         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 675         sbuf->mapcount++;
 676 }
 677 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 678 {
 679         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 680         sbuf->mapcount--;
 681         if (sbuf->mapcount == 0)
 682                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 683 }
 684 static const struct vm_operations_struct stk_v4l_vm_ops = {
 685         .open = stk_v4l_vm_open,
 686         .close = stk_v4l_vm_close
 687 };
 688
 689 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 690 {
 691         unsigned int i;
 692         int ret;
 693         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 694         struct stk_camera *dev = fp->private_data;
 695         struct stk_sio_buffer *sbuf = NULL;
 696
 697         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 698                 return -EINVAL;
 699
 700         for (i = 0; i < dev->n_sbufs; i++) {
 701                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 702                         sbuf = dev->sio_bufs + i;
 703                         break;
 704                 }
 705         }
 706         if (sbuf == NULL)
 707                 return -EINVAL;
 708         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 709         if (ret)
 710                 return ret;
 711         vma->vm_flags |= VM_DONTEXPAND;
 712         vma->vm_private_data = sbuf;
 713         vma->vm_ops = &stk_v4l_vm_ops;
 714         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 715         stk_v4l_vm_open(vma);
 716         return 0;
 717 }
 718
 719 /* v4l ioctl handlers */
 720
 721 static int stk_vidioc_querycap(struct file *filp,
 722                 void *priv, struct v4l2_capability *cap)
 723 {
 724         strcpy(cap->driver, "stk");
 725         strcpy(cap->card, "stk");
 726         cap->version = DRIVER_VERSION_NUM;
 727
 728         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 729                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 730         return 0;
 731 }
 732
 733 static int stk_vidioc_enum_input(struct file *filp,
 734                 void *priv, struct v4l2_input *input)
 735 {
 736         if (input->index != 0)
 737                 return -EINVAL;
 738
 739         strcpy(input->name, "Syntek USB Camera");
 740         input->type = V4L2_INPUT_TYPE_CAMERA;
 741         return 0;
 742 }
 743
 744
 745 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 746 {
 747         *i = 0;
 748         return 0;
 749 }
 750
 751 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 752 {
 753         if (i != 0)
 754                 return -EINVAL;
 755         else
 756                 return 0;
 757 }
 758
 759 /* from vivi.c */
 760 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 761 {
 762         return 0;
 763 }
 764
 765 /* List of all V4Lv2 controls supported by the driver */
 766 static struct v4l2_queryctrl stk_controls[] = {
 767         {
 768                 .id      = V4L2_CID_BRIGHTNESS,
 769                 .type    = V4L2_CTRL_TYPE_INTEGER,
 770                 .name    = "Brightness",
 771                 .minimum = 0,
 772                 .maximum = 0xffff,
 773                 .step    = 0x0100,
 774                 .default_value = 0x6000,
 775         },
 776         {
 777                 .id      = V4L2_CID_HFLIP,
 778                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
 779                 .name    = "Horizontal Flip",
 780                 .minimum = 0,
 781                 .maximum = 1,
 782                 .step    = 1,
 783                 .default_value = 1,
 784         },
 785         {
 786                 .id      = V4L2_CID_VFLIP,
 787                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
 788                 .name    = "Vertical Flip",
 789                 .minimum = 0,
 790                 .maximum = 1,
 791                 .step    = 1,
 792                 .default_value = 1,
 793         },
 794 };
 795
 796 static int stk_vidioc_queryctrl(struct file *filp,
 797                 void *priv, struct v4l2_queryctrl *c)
 798 {
 799         int i;
 800         int nbr;
 801         nbr = ARRAY_SIZE(stk_controls);
 802
 803         for (i = 0; i < nbr; i++) {
 804                 if (stk_controls[i].id == c->id) {
 805                         memcpy(c, &stk_controls[i],
 806                                 sizeof(struct v4l2_queryctrl));
 807                         return 0;
 808                 }
 809         }
 810         return -EINVAL;
 811 }
 812
 813 static int stk_vidioc_g_ctrl(struct file *filp,
 814                 void *priv, struct v4l2_control *c)
 815 {
 816         struct stk_camera *dev = priv;
 817         switch (c->id) {
 818         case V4L2_CID_BRIGHTNESS:
 819                 c->value = dev->vsettings.brightness;
 820                 break;
 821         case V4L2_CID_HFLIP:
 822                 c->value = dev->vsettings.hflip;
 823                 break;
 824         case V4L2_CID_VFLIP:
 825                 c->value = dev->vsettings.vflip;
 826                 break;
 827         default:
 828                 return -EINVAL;
 829         }
 830         return 0;
 831 }
 832
 833 static int stk_vidioc_s_ctrl(struct file *filp,
 834                 void *priv, struct v4l2_control *c)
 835 {
 836         struct stk_camera *dev = priv;
 837         switch (c->id) {
 838         case V4L2_CID_BRIGHTNESS:
 839                 dev->vsettings.brightness = c->value;
 840                 return stk_sensor_set_brightness(dev, c->value >> 8);
 841         case V4L2_CID_HFLIP:
 842                 dev->vsettings.hflip = c->value;
 843                 return 0;
 844         case V4L2_CID_VFLIP:
 845                 dev->vsettings.vflip = c->value;
 846                 return 0;
 847         default:
 848                 return -EINVAL;
 849         }
 850         return 0;
 851 }
 852
 853
 854 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 855                 void *priv, struct v4l2_fmtdesc *fmtd)
 856 {
 857         switch (fmtd->index) {
 858         case 0:
 859                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 860                 strcpy(fmtd->description, "r5g6b5");
 861                 break;
 862         case 1:
 863                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 864                 strcpy(fmtd->description, "r5g6b5BE");
 865                 break;
 866         case 2:
 867                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 868                 strcpy(fmtd->description, "yuv4:2:2");
 869                 break;
 870         case 3:
 871                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 872                 strcpy(fmtd->description, "Raw bayer");
 873                 break;
 874         case 4:
 875                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 876                 strcpy(fmtd->description, "yuv4:2:2");
 877                 break;
 878         default:
 879                 return -EINVAL;
 880         }
 881         return 0;
 882 }
 883
 884 static struct stk_size {
 885         unsigned w;
 886         unsigned h;
 887         enum stk_mode m;
 888 } stk_sizes[] = {
 889         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 890         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 891         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 892         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 893         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 894 };
 895
 896 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 897                 void *priv, struct v4l2_format *f)
 898 {
 899         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 900         struct stk_camera *dev = priv;
 901         int i;
 902
 903         for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
 904                         stk_sizes[i].m != dev->vsettings.mode; i++)
 905                 ;
 906         if (i == ARRAY_SIZE(stk_sizes)) {
 907                 STK_ERROR("ERROR: mode invalid\n");
 908                 return -EINVAL;
 909         }
 910         pix_format->width = stk_sizes[i].w;
 911         pix_format->height = stk_sizes[i].h;
 912         pix_format->field = V4L2_FIELD_NONE;
 913         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 914         pix_format->pixelformat = dev->vsettings.palette;
 915         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 916                 pix_format->bytesperline = pix_format->width;
 917         else
 918                 pix_format->bytesperline = 2 * pix_format->width;
 919         pix_format->sizeimage = pix_format->bytesperline
 920                                 * pix_format->height;
 921         return 0;
 922 }
 923
 924 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
 925                 void *priv, struct v4l2_format *fmtd)
 926 {
 927         int i;
 928         switch (fmtd->fmt.pix.pixelformat) {
 929         case V4L2_PIX_FMT_RGB565:
 930         case V4L2_PIX_FMT_RGB565X:
 931         case V4L2_PIX_FMT_UYVY:
 932         case V4L2_PIX_FMT_YUYV:
 933         case V4L2_PIX_FMT_SBGGR8:
 934                 break;
 935         default:
 936                 return -EINVAL;
 937         }
 938         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
 939                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
 940                         break;
 941         }
 942         if (i == ARRAY_SIZE(stk_sizes)
 943                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
 944                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
 945                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
 946                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
 947                 fmtd->fmt.pix.priv = i - 1;
 948         } else {
 949                 fmtd->fmt.pix.height = stk_sizes[i].h;
 950                 fmtd->fmt.pix.width = stk_sizes[i].w;
 951                 fmtd->fmt.pix.priv = i;
 952         }
 953
 954         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
 955         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 956         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
 957                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
 958         else
 959                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
 960         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
 961                 * fmtd->fmt.pix.height;
 962         return 0;
 963 }
 964
 965 static int stk_setup_format(struct stk_camera *dev)
 966 {
 967         int i = 0;
 968         int depth;
 969         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 970                 depth = 1;
 971         else
 972                 depth = 2;
 973         while (i < ARRAY_SIZE(stk_sizes) &&
 974                         stk_sizes[i].m != dev->vsettings.mode)
 975                 i++;
 976         if (i == ARRAY_SIZE(stk_sizes)) {
 977                 STK_ERROR("Something is broken in %s\n", __func__);
 978                 return -EFAULT;
 979         }
 980         /* This registers controls some timings, not sure of what. */
 981         stk_camera_write_reg(dev, 0x001b, 0x0e);
 982         if (dev->vsettings.mode == MODE_SXGA)
 983                 stk_camera_write_reg(dev, 0x001c, 0x0e);
 984         else
 985                 stk_camera_write_reg(dev, 0x001c, 0x46);
 986         /*
 987          * Registers 0x0115 0x0114 are the size of each line (bytes),
 988          * regs 0x0117 0x0116 are the heigth of the image.
 989          */
 990         stk_camera_write_reg(dev, 0x0115,
 991                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
 992         stk_camera_write_reg(dev, 0x0114,
 993                 (stk_sizes[i].w * depth) & 0xff);
 994         stk_camera_write_reg(dev, 0x0117,
 995                 (stk_sizes[i].h >> 8) & 0xff);
 996         stk_camera_write_reg(dev, 0x0116,
 997                 stk_sizes[i].h & 0xff);
 998         return stk_sensor_configure(dev);
 999 }
1000
1001 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1002                 void *priv, struct v4l2_format *fmtd)
1003 {
1004         int ret;
1005         struct stk_camera *dev = priv;
1006
1007         if (dev == NULL)
1008                 return -ENODEV;
1009         if (!is_present(dev))
1010                 return -ENODEV;
1011         if (is_streaming(dev))
1012                 return -EBUSY;
1013         if (dev->owner && dev->owner != filp)
1014                 return -EBUSY;
1015         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1016         if (ret)
1017                 return ret;
1018         dev->owner = filp;
1019
1020         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1021         stk_free_buffers(dev);
1022         dev->frame_size = fmtd->fmt.pix.sizeimage;
1023         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1024
1025         stk_initialise(dev);
1026         return stk_setup_format(dev);
1027 }
1028
1029 static int stk_vidioc_reqbufs(struct file *filp,
1030                 void *priv, struct v4l2_requestbuffers *rb)
1031 {
1032         struct stk_camera *dev = priv;
1033
1034         if (dev == NULL)
1035                 return -ENODEV;
1036         if (rb->memory != V4L2_MEMORY_MMAP)
1037                 return -EINVAL;
1038         if (is_streaming(dev)
1039                 || (dev->owner && dev->owner != filp))
1040                 return -EBUSY;
1041         dev->owner = filp;
1042
1043         /*FIXME If they ask for zero, we must stop streaming and free */
1044         if (rb->count < 3)
1045                 rb->count = 3;
1046         /* Arbitrary limit */
1047         else if (rb->count > 5)
1048                 rb->count = 5;
1049
1050         stk_allocate_buffers(dev, rb->count);
1051         rb->count = dev->n_sbufs;
1052         return 0;
1053 }
1054
1055 static int stk_vidioc_querybuf(struct file *filp,
1056                 void *priv, struct v4l2_buffer *buf)
1057 {
1058         struct stk_camera *dev = priv;
1059         struct stk_sio_buffer *sbuf;
1060
1061         if (buf->index >= dev->n_sbufs)
1062                 return -EINVAL;
1063         sbuf = dev->sio_bufs + buf->index;
1064         *buf = sbuf->v4lbuf;
1065         return 0;
1066 }
1067
1068 static int stk_vidioc_qbuf(struct file *filp,
1069                 void *priv, struct v4l2_buffer *buf)
1070 {
1071         struct stk_camera *dev = priv;
1072         struct stk_sio_buffer *sbuf;
1073         unsigned long flags;
1074
1075         if (buf->memory != V4L2_MEMORY_MMAP)
1076                 return -EINVAL;
1077
1078         if (buf->index >= dev->n_sbufs)
1079                 return -EINVAL;
1080         sbuf = dev->sio_bufs + buf->index;
1081         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1082                 return 0;
1083         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1084         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1085         spin_lock_irqsave(&dev->spinlock, flags);
1086         list_add_tail(&sbuf->list, &dev->sio_avail);
1087         *buf = sbuf->v4lbuf;
1088         spin_unlock_irqrestore(&dev->spinlock, flags);
1089         return 0;
1090 }
1091
1092 static int stk_vidioc_dqbuf(struct file *filp,
1093                 void *priv, struct v4l2_buffer *buf)
1094 {
1095         struct stk_camera *dev = priv;
1096         struct stk_sio_buffer *sbuf;
1097         unsigned long flags;
1098         int ret;
1099
1100         if (!is_streaming(dev))
1101                 return -EINVAL;
1102
1103         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1104                 return -EWOULDBLOCK;
1105         ret = wait_event_interruptible(dev->wait_frame,
1106                 !list_empty(&dev->sio_full) || !is_present(dev));
1107         if (ret)
1108                 return ret;
1109         if (!is_present(dev))
1110                 return -EIO;
1111
1112         spin_lock_irqsave(&dev->spinlock, flags);
1113         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1114         list_del_init(&sbuf->list);
1115         spin_unlock_irqrestore(&dev->spinlock, flags);
1116         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1117         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1118         sbuf->v4lbuf.sequence = ++dev->sequence;
1119         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1120
1121         *buf = sbuf->v4lbuf;
1122         return 0;
1123 }
1124
1125 static int stk_vidioc_streamon(struct file *filp,
1126                 void *priv, enum v4l2_buf_type type)
1127 {
1128         struct stk_camera *dev = priv;
1129         if (is_streaming(dev))
1130                 return 0;
1131         if (dev->sio_bufs == NULL)
1132                 return -EINVAL;
1133         dev->sequence = 0;
1134         return stk_start_stream(dev);
1135 }
1136
1137 static int stk_vidioc_streamoff(struct file *filp,
1138                 void *priv, enum v4l2_buf_type type)
1139 {
1140         struct stk_camera *dev = priv;
1141         unsigned long flags;
1142         int i;
1143         stk_stop_stream(dev);
1144         spin_lock_irqsave(&dev->spinlock, flags);
1145         INIT_LIST_HEAD(&dev->sio_avail);
1146         INIT_LIST_HEAD(&dev->sio_full);
1147         for (i = 0; i < dev->n_sbufs; i++) {
1148                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1149                 dev->sio_bufs[i].v4lbuf.flags = 0;
1150         }
1151         spin_unlock_irqrestore(&dev->spinlock, flags);
1152         return 0;
1153 }
1154
1155
1156 static int stk_vidioc_g_parm(struct file *filp,
1157                 void *priv, struct v4l2_streamparm *sp)
1158 {
1159         /*FIXME This is not correct */
1160         sp->parm.capture.timeperframe.numerator = 1;
1161         sp->parm.capture.timeperframe.denominator = 30;
1162         sp->parm.capture.readbuffers = 2;
1163         return 0;
1164 }
1165
1166 static int stk_vidioc_enum_framesizes(struct file *filp,
1167                 void *priv, struct v4l2_frmsizeenum *frms)
1168 {
1169         if (frms->index >= ARRAY_SIZE(stk_sizes))
1170                 return -EINVAL;
1171         switch (frms->pixel_format) {
1172         case V4L2_PIX_FMT_RGB565:
1173         case V4L2_PIX_FMT_RGB565X:
1174         case V4L2_PIX_FMT_UYVY:
1175         case V4L2_PIX_FMT_YUYV:
1176         case V4L2_PIX_FMT_SBGGR8:
1177                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1178                 frms->discrete.width = stk_sizes[frms->index].w;
1179                 frms->discrete.height = stk_sizes[frms->index].h;
1180                 return 0;
1181         default: return -EINVAL;
1182         }
1183 }
1184
1185 static struct v4l2_file_operations v4l_stk_fops = {
1186         .owner = THIS_MODULE,
1187         .open = v4l_stk_open,
1188         .release = v4l_stk_release,
1189         .read = v4l_stk_read,
1190         .poll = v4l_stk_poll,
1191         .mmap = v4l_stk_mmap,
1192         .ioctl = video_ioctl2,
1193 };
1194
1195 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1196         .vidioc_querycap = stk_vidioc_querycap,
1197         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1198         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1199         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1200         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1201         .vidioc_enum_input = stk_vidioc_enum_input,
1202         .vidioc_s_input = stk_vidioc_s_input,
1203         .vidioc_g_input = stk_vidioc_g_input,
1204         .vidioc_s_std = stk_vidioc_s_std,
1205         .vidioc_reqbufs = stk_vidioc_reqbufs,
1206         .vidioc_querybuf = stk_vidioc_querybuf,
1207         .vidioc_qbuf = stk_vidioc_qbuf,
1208         .vidioc_dqbuf = stk_vidioc_dqbuf,
1209         .vidioc_streamon = stk_vidioc_streamon,
1210         .vidioc_streamoff = stk_vidioc_streamoff,
1211         .vidioc_queryctrl = stk_vidioc_queryctrl,
1212         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1213         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1214         .vidioc_g_parm = stk_vidioc_g_parm,
1215         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1216 };
1217
1218 static void stk_v4l_dev_release(struct video_device *vd)
1219 {
1220         struct stk_camera *dev = vdev_to_camera(vd);
1221
1222         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1223                 STK_ERROR("We are leaking memory\n");
1224         usb_put_intf(dev->interface);
1225         kfree(dev);
1226 }
1227
1228 static struct video_device stk_v4l_data = {
1229         .name = "stkwebcam",
1230         .tvnorms = V4L2_STD_UNKNOWN,
1231         .current_norm = V4L2_STD_UNKNOWN,
1232         .fops = &v4l_stk_fops,
1233         .ioctl_ops = &v4l_stk_ioctl_ops,
1234         .release = stk_v4l_dev_release,
1235 };
1236
1237
1238 static int stk_register_video_device(struct stk_camera *dev)
1239 {
1240         int err;
1241
1242         dev->vdev = stk_v4l_data;
1243         dev->vdev.debug = debug;
1244         dev->vdev.parent = &dev->interface->dev;
1245         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1246         if (err)
1247                 STK_ERROR("v4l registration failed\n");
1248         else
1249                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1250                          video_device_node_name(&dev->vdev));
1251         return err;
1252 }
1253
1254
1255 /* USB Stuff */
1256
1257 static int stk_camera_probe(struct usb_interface *interface,
1258                 const struct usb_device_id *id)
1259 {
1260         int i;
1261         int err = 0;
1262
1263         struct stk_camera *dev = NULL;
1264         struct usb_device *udev = interface_to_usbdev(interface);
1265         struct usb_host_interface *iface_desc;
1266         struct usb_endpoint_descriptor *endpoint;
1267
1268         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1269         if (dev == NULL) {
1270                 STK_ERROR("Out of memory !\n");
1271                 return -ENOMEM;
1272         }
1273
1274         spin_lock_init(&dev->spinlock);
1275         init_waitqueue_head(&dev->wait_frame);
1276
1277         dev->udev = udev;
1278         dev->interface = interface;
1279         usb_get_intf(interface);
1280
1281         dev->vsettings.vflip = vflip;
1282         dev->vsettings.hflip = hflip;
1283         dev->n_sbufs = 0;
1284         set_present(dev);
1285
1286         /* Set up the endpoint information
1287          * use only the first isoc-in endpoint
1288          * for the current alternate setting */
1289         iface_desc = interface->cur_altsetting;
1290
1291         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1292                 endpoint = &iface_desc->endpoint[i].desc;
1293
1294                 if (!dev->isoc_ep
1295                         && usb_endpoint_is_isoc_in(endpoint)) {
1296                         /* we found an isoc in endpoint */
1297                         dev->isoc_ep = usb_endpoint_num(endpoint);
1298                         break;
1299                 }
1300         }
1301         if (!dev->isoc_ep) {
1302                 STK_ERROR("Could not find isoc-in endpoint");
1303                 err = -ENODEV;
1304                 goto error;
1305         }
1306         dev->vsettings.brightness = 0x7fff;
1307         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1308         dev->vsettings.mode = MODE_VGA;
1309         dev->frame_size = 640 * 480 * 2;
1310
1311         INIT_LIST_HEAD(&dev->sio_avail);
1312         INIT_LIST_HEAD(&dev->sio_full);
1313
1314         usb_set_intfdata(interface, dev);
1315
1316         err = stk_register_video_device(dev);
1317         if (err)
1318                 goto error;
1319
1320         return 0;
1321
1322 error:
1323         kfree(dev);
1324         return err;
1325 }
1326
1327 static void stk_camera_disconnect(struct usb_interface *interface)
1328 {
1329         struct stk_camera *dev = usb_get_intfdata(interface);
1330
1331         usb_set_intfdata(interface, NULL);
1332         unset_present(dev);
1333
1334         wake_up_interruptible(&dev->wait_frame);
1335
1336         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1337                  video_device_node_name(&dev->vdev));
1338
1339         video_unregister_device(&dev->vdev);
1340 }
1341
1342 #ifdef CONFIG_PM
1343 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1344 {
1345         struct stk_camera *dev = usb_get_intfdata(intf);
1346         if (is_streaming(dev)) {
1347                 stk_stop_stream(dev);
1348                 /* yes, this is ugly */
1349                 set_streaming(dev);
1350         }
1351         return 0;
1352 }
1353
1354 static int stk_camera_resume(struct usb_interface *intf)
1355 {
1356         struct stk_camera *dev = usb_get_intfdata(intf);
1357         if (!is_initialised(dev))
1358                 return 0;
1359         unset_initialised(dev);
1360         stk_initialise(dev);
1361         stk_camera_write_reg(dev, 0x0, 0x49);
1362         stk_setup_format(dev);
1363         if (is_streaming(dev))
1364                 stk_start_stream(dev);
1365         return 0;
1366 }
1367 #endif
1368
1369 static struct usb_driver stk_camera_driver = {
1370         .name = "stkwebcam",
1371         .probe = stk_camera_probe,
1372         .disconnect = stk_camera_disconnect,
1373         .id_table = stkwebcam_table,
1374 #ifdef CONFIG_PM
1375         .suspend = stk_camera_suspend,
1376         .resume = stk_camera_resume,
1377 #endif
1378 };
1379
1380
1381 static int __init stk_camera_init(void)
1382 {
1383         int result;
1384
1385         result = usb_register(&stk_camera_driver);
1386         if (result)
1387                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1388
1389
1390         return result;
1391 }
1392
1393 static void __exit stk_camera_exit(void)
1394 {
1395         usb_deregister(&stk_camera_driver);
1396 }
1397
1398 module_init(stk_camera_init);
1399 module_exit(stk_camera_exit);
1400
1401