drivers/media/usb/stkwebcam/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/dmi.h>
  32 #include <linux/usb.h>
  33 #include <linux/mm.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/videodev2.h>
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-ioctl.h>
  38 #include <media/v4l2-event.h>
  39
  40 #include "stk-webcam.h"
  41
  42
  43 static int hflip = -1;
  44 module_param(hflip, int, 0444);
  45 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
  46
  47 static int vflip = -1;
  48 module_param(vflip, int, 0444);
  49 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
  50
  51 static int debug;
  52 module_param(debug, int, 0444);
  53 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
  54
  55 MODULE_LICENSE("GPL");
  56 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
  57 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
  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  * The stk webcam laptop module is mounted upside down in some laptops :(
  69  *
  70  * Some background information (thanks to Hans de Goede for providing this):
  71  *
  72  * 1) Once upon a time the stkwebcam driver was written
  73  *
  74  * 2) The webcam in question was used mostly in Asus laptop models, including
  75  * the laptop of the original author of the driver, and in these models, in
  76  * typical Asus fashion (see the long long list for uvc cams inside v4l-utils),
  77  * they mounted the webcam-module the wrong way up. So the hflip and vflip
  78  * module options were given a default value of 1 (the correct value for
  79  * upside down mounted models)
  80  *
  81  * 3) Years later I got a bug report from a user with a laptop with stkwebcam,
  82  * where the module was actually mounted the right way up, and thus showed
  83  * upside down under Linux. So now I was facing the choice of 2 options:
  84  *
  85  * a) Add a not-upside-down list to stkwebcam, which overrules the default.
  86  *
  87  * b) Do it like all the other drivers do, and make the default right for
  88  *    cams mounted the proper way and add an upside-down model list, with
  89  *    models where we need to flip-by-default.
  90  *
  91  * Despite knowing that going b) would cause a period of pain where we were
  92  * building the table I opted to go for option b), since a) is just too ugly,
  93  * and worse different from how every other driver does it leading to
  94  * confusion in the long run. This change was made in kernel 3.6.
  95  *
  96  * So for any user report about upside-down images since kernel 3.6 ask them
  97  * to provide the output of 'sudo dmidecode' so the laptop can be added in
  98  * the table below.
  99  */
 100 static const struct dmi_system_id stk_upside_down_dmi_table[] = {
 101         {
 102                 .ident = "ASUS G1",
 103                 .matches = {
 104                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 105                         DMI_MATCH(DMI_PRODUCT_NAME, "G1")
 106                 }
 107         }, {
 108                 .ident = "ASUS F3JC",
 109                 .matches = {
 110                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 111                         DMI_MATCH(DMI_PRODUCT_NAME, "F3JC")
 112                 }
 113         },
 114         {}
 115 };
 116
 117
 118 /*
 119  * Basic stuff
 120  */
 121 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
 122 {
 123         struct usb_device *udev = dev->udev;
 124         int ret;
 125
 126         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 127                         0x01,
 128                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 129                         value,
 130                         index,
 131                         NULL,
 132                         0,
 133                         500);
 134         if (ret < 0)
 135                 return ret;
 136         else
 137                 return 0;
 138 }
 139
 140 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
 141 {
 142         struct usb_device *udev = dev->udev;
 143         int ret;
 144
 145         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 146                         0x00,
 147                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 148                         0x00,
 149                         index,
 150                         (u8 *) value,
 151                         sizeof(u8),
 152                         500);
 153         if (ret < 0)
 154                 return ret;
 155         else
 156                 return 0;
 157 }
 158
 159 static int stk_start_stream(struct stk_camera *dev)
 160 {
 161         int value;
 162         int i, ret;
 163         int value_116, value_117;
 164
 165         if (!is_present(dev))
 166                 return -ENODEV;
 167         if (!is_memallocd(dev) || !is_initialised(dev)) {
 168                 STK_ERROR("FIXME: Buffers are not allocated\n");
 169                 return -EFAULT;
 170         }
 171         ret = usb_set_interface(dev->udev, 0, 5);
 172
 173         if (ret < 0)
 174                 STK_ERROR("usb_set_interface failed !\n");
 175         if (stk_sensor_wakeup(dev))
 176                 STK_ERROR("error awaking the sensor\n");
 177
 178         stk_camera_read_reg(dev, 0x0116, &value_116);
 179         stk_camera_read_reg(dev, 0x0117, &value_117);
 180
 181         stk_camera_write_reg(dev, 0x0116, 0x0000);
 182         stk_camera_write_reg(dev, 0x0117, 0x0000);
 183
 184         stk_camera_read_reg(dev, 0x0100, &value);
 185         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 186
 187         stk_camera_write_reg(dev, 0x0116, value_116);
 188         stk_camera_write_reg(dev, 0x0117, value_117);
 189         for (i = 0; i < MAX_ISO_BUFS; i++) {
 190                 if (dev->isobufs[i].urb) {
 191                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 192                         atomic_inc(&dev->urbs_used);
 193                         if (ret)
 194                                 return ret;
 195                 }
 196         }
 197         set_streaming(dev);
 198         return 0;
 199 }
 200
 201 static int stk_stop_stream(struct stk_camera *dev)
 202 {
 203         int value;
 204         int i;
 205         if (is_present(dev)) {
 206                 stk_camera_read_reg(dev, 0x0100, &value);
 207                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 208                 if (dev->isobufs != NULL) {
 209                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 210                                 if (dev->isobufs[i].urb)
 211                                         usb_kill_urb(dev->isobufs[i].urb);
 212                         }
 213                 }
 214                 unset_streaming(dev);
 215
 216                 if (usb_set_interface(dev->udev, 0, 0))
 217                         STK_ERROR("usb_set_interface failed !\n");
 218                 if (stk_sensor_sleep(dev))
 219                         STK_ERROR("error suspending the sensor\n");
 220         }
 221         return 0;
 222 }
 223
 224 /*
 225  * This seems to be the shortest init sequence we
 226  * must do in order to find the sensor
 227  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 228  * is also reset. Maybe powers down it?
 229  * Rest of values don't make a difference
 230  */
 231
 232 static struct regval stk1125_initvals[] = {
 233         /*TODO: What means this sequence? */
 234         {0x0000, 0x24},
 235         {0x0100, 0x21},
 236         {0x0002, 0x68},
 237         {0x0003, 0x80},
 238         {0x0005, 0x00},
 239         {0x0007, 0x03},
 240         {0x000d, 0x00},
 241         {0x000f, 0x02},
 242         {0x0300, 0x12},
 243         {0x0350, 0x41},
 244         {0x0351, 0x00},
 245         {0x0352, 0x00},
 246         {0x0353, 0x00},
 247         {0x0018, 0x10},
 248         {0x0019, 0x00},
 249         {0x001b, 0x0e},
 250         {0x001c, 0x46},
 251         {0x0300, 0x80},
 252         {0x001a, 0x04},
 253         {0x0110, 0x00},
 254         {0x0111, 0x00},
 255         {0x0112, 0x00},
 256         {0x0113, 0x00},
 257
 258         {0xffff, 0xff},
 259 };
 260
 261
 262 static int stk_initialise(struct stk_camera *dev)
 263 {
 264         struct regval *rv;
 265         int ret;
 266         if (!is_present(dev))
 267                 return -ENODEV;
 268         if (is_initialised(dev))
 269                 return 0;
 270         rv = stk1125_initvals;
 271         while (rv->reg != 0xffff) {
 272                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 273                 if (ret)
 274                         return ret;
 275                 rv++;
 276         }
 277         if (stk_sensor_init(dev) == 0) {
 278                 set_initialised(dev);
 279                 return 0;
 280         } else
 281                 return -1;
 282 }
 283
 284 /* *********************************************** */
 285 /*
 286  * This function is called as an URB transfert is complete (Isochronous pipe).
 287  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 288  * and not stall. Neat.
 289  */
 290 static void stk_isoc_handler(struct urb *urb)
 291 {
 292         int i;
 293         int ret;
 294         int framelen;
 295         unsigned long flags;
 296
 297         unsigned char *fill = NULL;
 298         unsigned char *iso_buf = NULL;
 299
 300         struct stk_camera *dev;
 301         struct stk_sio_buffer *fb;
 302
 303         dev = (struct stk_camera *) urb->context;
 304
 305         if (dev == NULL) {
 306                 STK_ERROR("isoc_handler called with NULL device !\n");
 307                 return;
 308         }
 309
 310         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 311                 || urb->status == -ESHUTDOWN) {
 312                 atomic_dec(&dev->urbs_used);
 313                 return;
 314         }
 315
 316         spin_lock_irqsave(&dev->spinlock, flags);
 317
 318         if (urb->status != -EINPROGRESS && urb->status != 0) {
 319                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 320                 goto resubmit;
 321         }
 322
 323         if (list_empty(&dev->sio_avail)) {
 324                 /*FIXME Stop streaming after a while */
 325                 (void) (printk_ratelimit() &&
 326                 STK_ERROR("isoc_handler without available buffer!\n"));
 327                 goto resubmit;
 328         }
 329         fb = list_first_entry(&dev->sio_avail,
 330                         struct stk_sio_buffer, list);
 331         fill = fb->buffer + fb->v4lbuf.bytesused;
 332
 333         for (i = 0; i < urb->number_of_packets; i++) {
 334                 if (urb->iso_frame_desc[i].status != 0) {
 335                         if (urb->iso_frame_desc[i].status != -EXDEV)
 336                                 STK_ERROR("Frame %d has error %d\n", i,
 337                                         urb->iso_frame_desc[i].status);
 338                         continue;
 339                 }
 340                 framelen = urb->iso_frame_desc[i].actual_length;
 341                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 342
 343                 if (framelen <= 4)
 344                         continue; /* no data */
 345
 346                 /*
 347                  * we found something informational from there
 348                  * the isoc frames have to type of headers
 349                  * type1: 00 xx 00 00 or 20 xx 00 00
 350                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 351                  * xx is a sequencer which has never been seen over 0x3f
 352                  * imho data written down looks like bayer, i see similarities
 353                  * after every 640 bytes
 354                  */
 355                 if (*iso_buf & 0x80) {
 356                         framelen -= 8;
 357                         iso_buf += 8;
 358                         /* This marks a new frame */
 359                         if (fb->v4lbuf.bytesused != 0
 360                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 361                                 (void) (printk_ratelimit() &&
 362                                 STK_ERROR("frame %d, "
 363                                         "bytesused=%d, skipping\n",
 364                                         i, fb->v4lbuf.bytesused));
 365                                 fb->v4lbuf.bytesused = 0;
 366                                 fill = fb->buffer;
 367                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 368                                 if (list_is_singular(&dev->sio_avail)) {
 369                                         /* Always reuse the last buffer */
 370                                         fb->v4lbuf.bytesused = 0;
 371                                         fill = fb->buffer;
 372                                 } else {
 373                                         list_move_tail(dev->sio_avail.next,
 374                                                 &dev->sio_full);
 375                                         wake_up(&dev->wait_frame);
 376                                         fb = list_first_entry(&dev->sio_avail,
 377                                                 struct stk_sio_buffer, list);
 378                                         fb->v4lbuf.bytesused = 0;
 379                                         fill = fb->buffer;
 380                                 }
 381                         }
 382                 } else {
 383                         framelen -= 4;
 384                         iso_buf += 4;
 385                 }
 386
 387                 /* Our buffer is full !!! */
 388                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 389                         (void) (printk_ratelimit() &&
 390                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 391                         /*FIXME Do something here? */
 392                         continue;
 393                 }
 394                 spin_unlock_irqrestore(&dev->spinlock, flags);
 395                 memcpy(fill, iso_buf, framelen);
 396                 spin_lock_irqsave(&dev->spinlock, flags);
 397                 fill += framelen;
 398
 399                 /* New size of our buffer */
 400                 fb->v4lbuf.bytesused += framelen;
 401         }
 402
 403 resubmit:
 404         spin_unlock_irqrestore(&dev->spinlock, flags);
 405         urb->dev = dev->udev;
 406         ret = usb_submit_urb(urb, GFP_ATOMIC);
 407         if (ret != 0) {
 408                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 409                         ret);
 410         }
 411 }
 412
 413 /* -------------------------------------------- */
 414
 415 static int stk_prepare_iso(struct stk_camera *dev)
 416 {
 417         void *kbuf;
 418         int i, j;
 419         struct urb *urb;
 420         struct usb_device *udev;
 421
 422         if (dev == NULL)
 423                 return -ENXIO;
 424         udev = dev->udev;
 425
 426         if (dev->isobufs)
 427                 STK_ERROR("isobufs already allocated. Bad\n");
 428         else
 429                 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
 430                                        GFP_KERNEL);
 431         if (dev->isobufs == NULL) {
 432                 STK_ERROR("Unable to allocate iso buffers\n");
 433                 return -ENOMEM;
 434         }
 435         for (i = 0; i < MAX_ISO_BUFS; i++) {
 436                 if (dev->isobufs[i].data == NULL) {
 437                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 438                         if (kbuf == NULL) {
 439                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 440                                         i);
 441                                 goto isobufs_out;
 442                         }
 443                         dev->isobufs[i].data = kbuf;
 444                 } else
 445                         STK_ERROR("isobuf data already allocated\n");
 446                 if (dev->isobufs[i].urb == NULL) {
 447                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 448                         if (urb == NULL) {
 449                                 STK_ERROR("Failed to allocate URB %d\n", i);
 450                                 goto isobufs_out;
 451                         }
 452                         dev->isobufs[i].urb = urb;
 453                 } else {
 454                         STK_ERROR("Killing URB\n");
 455                         usb_kill_urb(dev->isobufs[i].urb);
 456                         urb = dev->isobufs[i].urb;
 457                 }
 458                 urb->interval = 1;
 459                 urb->dev = udev;
 460                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 461                 urb->transfer_flags = URB_ISO_ASAP;
 462                 urb->transfer_buffer = dev->isobufs[i].data;
 463                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 464                 urb->complete = stk_isoc_handler;
 465                 urb->context = dev;
 466                 urb->start_frame = 0;
 467                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 468
 469                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 470                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 471                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 472                 }
 473         }
 474         set_memallocd(dev);
 475         return 0;
 476
 477 isobufs_out:
 478         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 479                 kfree(dev->isobufs[i].data);
 480         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 481                 usb_free_urb(dev->isobufs[i].urb);
 482         kfree(dev->isobufs);
 483         dev->isobufs = NULL;
 484         return -ENOMEM;
 485 }
 486
 487 static void stk_clean_iso(struct stk_camera *dev)
 488 {
 489         int i;
 490
 491         if (dev == NULL || dev->isobufs == NULL)
 492                 return;
 493
 494         for (i = 0; i < MAX_ISO_BUFS; i++) {
 495                 struct urb *urb;
 496
 497                 urb = dev->isobufs[i].urb;
 498                 if (urb) {
 499                         if (atomic_read(&dev->urbs_used) && is_present(dev))
 500                                 usb_kill_urb(urb);
 501                         usb_free_urb(urb);
 502                 }
 503                 kfree(dev->isobufs[i].data);
 504         }
 505         kfree(dev->isobufs);
 506         dev->isobufs = NULL;
 507         unset_memallocd(dev);
 508 }
 509
 510 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 511 {
 512         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 513         INIT_LIST_HEAD(&buf->list);
 514         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 515         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 516         if (buf->buffer == NULL)
 517                 return -ENOMEM;
 518         buf->mapcount = 0;
 519         buf->dev = dev;
 520         buf->v4lbuf.index = index;
 521         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 522         buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 523         buf->v4lbuf.field = V4L2_FIELD_NONE;
 524         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 525         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 526         return 0;
 527 }
 528
 529 static int stk_free_sio_buffers(struct stk_camera *dev)
 530 {
 531         int i;
 532         int nbufs;
 533         unsigned long flags;
 534         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 535                 return 0;
 536         /*
 537         * If any buffers are mapped, we cannot free them at all.
 538         */
 539         for (i = 0; i < dev->n_sbufs; i++) {
 540                 if (dev->sio_bufs[i].mapcount > 0)
 541                         return -EBUSY;
 542         }
 543         /*
 544         * OK, let's do it.
 545         */
 546         spin_lock_irqsave(&dev->spinlock, flags);
 547         INIT_LIST_HEAD(&dev->sio_avail);
 548         INIT_LIST_HEAD(&dev->sio_full);
 549         nbufs = dev->n_sbufs;
 550         dev->n_sbufs = 0;
 551         spin_unlock_irqrestore(&dev->spinlock, flags);
 552         for (i = 0; i < nbufs; i++) {
 553                 if (dev->sio_bufs[i].buffer != NULL)
 554                         vfree(dev->sio_bufs[i].buffer);
 555         }
 556         kfree(dev->sio_bufs);
 557         dev->sio_bufs = NULL;
 558         return 0;
 559 }
 560
 561 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 562 {
 563         int i;
 564         if (dev->sio_bufs != NULL)
 565                 STK_ERROR("sio_bufs already allocated\n");
 566         else {
 567                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 568                                 GFP_KERNEL);
 569                 if (dev->sio_bufs == NULL)
 570                         return -ENOMEM;
 571                 for (i = 0; i < n_sbufs; i++) {
 572                         if (stk_setup_siobuf(dev, i))
 573                                 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
 574                         dev->n_sbufs = i+1;
 575                 }
 576         }
 577         return 0;
 578 }
 579
 580 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 581 {
 582         int err;
 583         err = stk_prepare_iso(dev);
 584         if (err) {
 585                 stk_clean_iso(dev);
 586                 return err;
 587         }
 588         err = stk_prepare_sio_buffers(dev, n_sbufs);
 589         if (err) {
 590                 stk_free_sio_buffers(dev);
 591                 return err;
 592         }
 593         return 0;
 594 }
 595
 596 static void stk_free_buffers(struct stk_camera *dev)
 597 {
 598         stk_clean_iso(dev);
 599         stk_free_sio_buffers(dev);
 600 }
 601 /* -------------------------------------------- */
 602
 603 /* v4l file operations */
 604
 605 static int v4l_stk_open(struct file *fp)
 606 {
 607         struct stk_camera *dev = video_drvdata(fp);
 608         int err;
 609
 610         if (dev == NULL || !is_present(dev))
 611                 return -ENXIO;
 612
 613         if (mutex_lock_interruptible(&dev->lock))
 614                 return -ERESTARTSYS;
 615         if (!dev->first_init)
 616                 stk_camera_write_reg(dev, 0x0, 0x24);
 617         else
 618                 dev->first_init = 0;
 619
 620         err = v4l2_fh_open(fp);
 621         if (!err)
 622                 usb_autopm_get_interface(dev->interface);
 623         mutex_unlock(&dev->lock);
 624         return err;
 625 }
 626
 627 static int v4l_stk_release(struct file *fp)
 628 {
 629         struct stk_camera *dev = video_drvdata(fp);
 630
 631         mutex_lock(&dev->lock);
 632         if (dev->owner == fp) {
 633                 stk_stop_stream(dev);
 634                 stk_free_buffers(dev);
 635                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
 636                 unset_initialised(dev);
 637                 dev->owner = NULL;
 638         }
 639
 640         if (is_present(dev))
 641                 usb_autopm_put_interface(dev->interface);
 642         mutex_unlock(&dev->lock);
 643         return v4l2_fh_release(fp);
 644 }
 645
 646 static ssize_t stk_read(struct file *fp, char __user *buf,
 647                 size_t count, loff_t *f_pos)
 648 {
 649         int i;
 650         int ret;
 651         unsigned long flags;
 652         struct stk_sio_buffer *sbuf;
 653         struct stk_camera *dev = video_drvdata(fp);
 654
 655         if (!is_present(dev))
 656                 return -EIO;
 657         if (dev->owner && (!dev->reading || dev->owner != fp))
 658                 return -EBUSY;
 659         dev->owner = fp;
 660         if (!is_streaming(dev)) {
 661                 if (stk_initialise(dev)
 662                         || stk_allocate_buffers(dev, 3)
 663                         || stk_start_stream(dev))
 664                         return -ENOMEM;
 665                 dev->reading = 1;
 666                 spin_lock_irqsave(&dev->spinlock, flags);
 667                 for (i = 0; i < dev->n_sbufs; i++) {
 668                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 669                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 670                 }
 671                 spin_unlock_irqrestore(&dev->spinlock, flags);
 672         }
 673         if (*f_pos == 0) {
 674                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 675                         return -EWOULDBLOCK;
 676                 ret = wait_event_interruptible(dev->wait_frame,
 677                         !list_empty(&dev->sio_full) || !is_present(dev));
 678                 if (ret)
 679                         return ret;
 680                 if (!is_present(dev))
 681                         return -EIO;
 682         }
 683         if (count + *f_pos > dev->frame_size)
 684                 count = dev->frame_size - *f_pos;
 685         spin_lock_irqsave(&dev->spinlock, flags);
 686         if (list_empty(&dev->sio_full)) {
 687                 spin_unlock_irqrestore(&dev->spinlock, flags);
 688                 STK_ERROR("BUG: No siobufs ready\n");
 689                 return 0;
 690         }
 691         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 692         spin_unlock_irqrestore(&dev->spinlock, flags);
 693
 694         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 695                 return -EFAULT;
 696
 697         *f_pos += count;
 698
 699         if (*f_pos >= dev->frame_size) {
 700                 *f_pos = 0;
 701                 spin_lock_irqsave(&dev->spinlock, flags);
 702                 list_move_tail(&sbuf->list, &dev->sio_avail);
 703                 spin_unlock_irqrestore(&dev->spinlock, flags);
 704         }
 705         return count;
 706 }
 707
 708 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 709                 size_t count, loff_t *f_pos)
 710 {
 711         struct stk_camera *dev = video_drvdata(fp);
 712         int ret;
 713
 714         if (mutex_lock_interruptible(&dev->lock))
 715                 return -ERESTARTSYS;
 716         ret = stk_read(fp, buf, count, f_pos);
 717         mutex_unlock(&dev->lock);
 718         return ret;
 719 }
 720
 721 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 722 {
 723         struct stk_camera *dev = video_drvdata(fp);
 724         unsigned res = v4l2_ctrl_poll(fp, wait);
 725
 726         poll_wait(fp, &dev->wait_frame, wait);
 727
 728         if (!is_present(dev))
 729                 return POLLERR;
 730
 731         if (!list_empty(&dev->sio_full))
 732                 return res | POLLIN | POLLRDNORM;
 733
 734         return res;
 735 }
 736
 737
 738 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 739 {
 740         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 741         sbuf->mapcount++;
 742 }
 743 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 744 {
 745         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 746         sbuf->mapcount--;
 747         if (sbuf->mapcount == 0)
 748                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 749 }
 750 static const struct vm_operations_struct stk_v4l_vm_ops = {
 751         .open = stk_v4l_vm_open,
 752         .close = stk_v4l_vm_close
 753 };
 754
 755 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 756 {
 757         unsigned int i;
 758         int ret;
 759         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 760         struct stk_camera *dev = video_drvdata(fp);
 761         struct stk_sio_buffer *sbuf = NULL;
 762
 763         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 764                 return -EINVAL;
 765
 766         for (i = 0; i < dev->n_sbufs; i++) {
 767                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 768                         sbuf = dev->sio_bufs + i;
 769                         break;
 770                 }
 771         }
 772         if (sbuf == NULL)
 773                 return -EINVAL;
 774         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 775         if (ret)
 776                 return ret;
 777         vma->vm_flags |= VM_DONTEXPAND;
 778         vma->vm_private_data = sbuf;
 779         vma->vm_ops = &stk_v4l_vm_ops;
 780         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 781         stk_v4l_vm_open(vma);
 782         return 0;
 783 }
 784
 785 /* v4l ioctl handlers */
 786
 787 static int stk_vidioc_querycap(struct file *filp,
 788                 void *priv, struct v4l2_capability *cap)
 789 {
 790         struct stk_camera *dev = video_drvdata(filp);
 791
 792         strcpy(cap->driver, "stk");
 793         strcpy(cap->card, "stk");
 794         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 795
 796         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
 797                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 798         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 799         return 0;
 800 }
 801
 802 static int stk_vidioc_enum_input(struct file *filp,
 803                 void *priv, struct v4l2_input *input)
 804 {
 805         if (input->index != 0)
 806                 return -EINVAL;
 807
 808         strcpy(input->name, "Syntek USB Camera");
 809         input->type = V4L2_INPUT_TYPE_CAMERA;
 810         return 0;
 811 }
 812
 813
 814 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 815 {
 816         *i = 0;
 817         return 0;
 818 }
 819
 820 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 821 {
 822         return i ? -EINVAL : 0;
 823 }
 824
 825 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
 826 {
 827         struct stk_camera *dev =
 828                 container_of(ctrl->handler, struct stk_camera, hdl);
 829
 830         switch (ctrl->id) {
 831         case V4L2_CID_BRIGHTNESS:
 832                 return stk_sensor_set_brightness(dev, ctrl->val);
 833         case V4L2_CID_HFLIP:
 834                 if (dmi_check_system(stk_upside_down_dmi_table))
 835                         dev->vsettings.hflip = !ctrl->val;
 836                 else
 837                         dev->vsettings.hflip = ctrl->val;
 838                 return 0;
 839         case V4L2_CID_VFLIP:
 840                 if (dmi_check_system(stk_upside_down_dmi_table))
 841                         dev->vsettings.vflip = !ctrl->val;
 842                 else
 843                         dev->vsettings.vflip = ctrl->val;
 844                 return 0;
 845         default:
 846                 return -EINVAL;
 847         }
 848         return 0;
 849 }
 850
 851
 852 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 853                 void *priv, struct v4l2_fmtdesc *fmtd)
 854 {
 855         switch (fmtd->index) {
 856         case 0:
 857                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 858                 strcpy(fmtd->description, "r5g6b5");
 859                 break;
 860         case 1:
 861                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 862                 strcpy(fmtd->description, "r5g6b5BE");
 863                 break;
 864         case 2:
 865                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 866                 strcpy(fmtd->description, "yuv4:2:2");
 867                 break;
 868         case 3:
 869                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 870                 strcpy(fmtd->description, "Raw bayer");
 871                 break;
 872         case 4:
 873                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 874                 strcpy(fmtd->description, "yuv4:2:2");
 875                 break;
 876         default:
 877                 return -EINVAL;
 878         }
 879         return 0;
 880 }
 881
 882 static struct stk_size {
 883         unsigned w;
 884         unsigned h;
 885         enum stk_mode m;
 886 } stk_sizes[] = {
 887         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 888         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 889         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 890         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 891         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 892 };
 893
 894 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 895                 void *priv, struct v4l2_format *f)
 896 {
 897         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 898         struct stk_camera *dev = video_drvdata(filp);
 899         int i;
 900
 901         for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
 902                         stk_sizes[i].m != dev->vsettings.mode; i++)
 903                 ;
 904         if (i == ARRAY_SIZE(stk_sizes)) {
 905                 STK_ERROR("ERROR: mode invalid\n");
 906                 return -EINVAL;
 907         }
 908         pix_format->width = stk_sizes[i].w;
 909         pix_format->height = stk_sizes[i].h;
 910         pix_format->field = V4L2_FIELD_NONE;
 911         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 912         pix_format->pixelformat = dev->vsettings.palette;
 913         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 914                 pix_format->bytesperline = pix_format->width;
 915         else
 916                 pix_format->bytesperline = 2 * pix_format->width;
 917         pix_format->sizeimage = pix_format->bytesperline
 918                                 * pix_format->height;
 919         pix_format->priv = 0;
 920         return 0;
 921 }
 922
 923 static int stk_try_fmt_vid_cap(struct file *filp,
 924                 struct v4l2_format *fmtd, int *idx)
 925 {
 926         int i;
 927         switch (fmtd->fmt.pix.pixelformat) {
 928         case V4L2_PIX_FMT_RGB565:
 929         case V4L2_PIX_FMT_RGB565X:
 930         case V4L2_PIX_FMT_UYVY:
 931         case V4L2_PIX_FMT_YUYV:
 932         case V4L2_PIX_FMT_SBGGR8:
 933                 break;
 934         default:
 935                 return -EINVAL;
 936         }
 937         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
 938                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
 939                         break;
 940         }
 941         if (i == ARRAY_SIZE(stk_sizes)
 942                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
 943                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
 944                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
 945                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
 946                 if (idx)
 947                         *idx = i - 1;
 948         } else {
 949                 fmtd->fmt.pix.height = stk_sizes[i].h;
 950                 fmtd->fmt.pix.width = stk_sizes[i].w;
 951                 if (idx)
 952                         *idx = i;
 953         }
 954
 955         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
 956         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 957         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
 958                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
 959         else
 960                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
 961         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
 962                 * fmtd->fmt.pix.height;
 963         fmtd->fmt.pix.priv = 0;
 964         return 0;
 965 }
 966
 967 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
 968                 void *priv, struct v4l2_format *fmtd)
 969 {
 970         return stk_try_fmt_vid_cap(filp, fmtd, NULL);
 971 }
 972
 973 static int stk_setup_format(struct stk_camera *dev)
 974 {
 975         int i = 0;
 976         int depth;
 977         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 978                 depth = 1;
 979         else
 980                 depth = 2;
 981         while (i < ARRAY_SIZE(stk_sizes) &&
 982                         stk_sizes[i].m != dev->vsettings.mode)
 983                 i++;
 984         if (i == ARRAY_SIZE(stk_sizes)) {
 985                 STK_ERROR("Something is broken in %s\n", __func__);
 986                 return -EFAULT;
 987         }
 988         /* This registers controls some timings, not sure of what. */
 989         stk_camera_write_reg(dev, 0x001b, 0x0e);
 990         if (dev->vsettings.mode == MODE_SXGA)
 991                 stk_camera_write_reg(dev, 0x001c, 0x0e);
 992         else
 993                 stk_camera_write_reg(dev, 0x001c, 0x46);
 994         /*
 995          * Registers 0x0115 0x0114 are the size of each line (bytes),
 996          * regs 0x0117 0x0116 are the heigth of the image.
 997          */
 998         stk_camera_write_reg(dev, 0x0115,
 999                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1000         stk_camera_write_reg(dev, 0x0114,
1001                 (stk_sizes[i].w * depth) & 0xff);
1002         stk_camera_write_reg(dev, 0x0117,
1003                 (stk_sizes[i].h >> 8) & 0xff);
1004         stk_camera_write_reg(dev, 0x0116,
1005                 stk_sizes[i].h & 0xff);
1006         return stk_sensor_configure(dev);
1007 }
1008
1009 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1010                 void *priv, struct v4l2_format *fmtd)
1011 {
1012         int ret;
1013         int idx;
1014         struct stk_camera *dev = video_drvdata(filp);
1015
1016         if (dev == NULL)
1017                 return -ENODEV;
1018         if (!is_present(dev))
1019                 return -ENODEV;
1020         if (is_streaming(dev))
1021                 return -EBUSY;
1022         if (dev->owner)
1023                 return -EBUSY;
1024         ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1025         if (ret)
1026                 return ret;
1027
1028         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1029         stk_free_buffers(dev);
1030         dev->frame_size = fmtd->fmt.pix.sizeimage;
1031         dev->vsettings.mode = stk_sizes[idx].m;
1032
1033         stk_initialise(dev);
1034         return stk_setup_format(dev);
1035 }
1036
1037 static int stk_vidioc_reqbufs(struct file *filp,
1038                 void *priv, struct v4l2_requestbuffers *rb)
1039 {
1040         struct stk_camera *dev = video_drvdata(filp);
1041
1042         if (dev == NULL)
1043                 return -ENODEV;
1044         if (rb->memory != V4L2_MEMORY_MMAP)
1045                 return -EINVAL;
1046         if (is_streaming(dev)
1047                 || (dev->owner && dev->owner != filp))
1048                 return -EBUSY;
1049         stk_free_buffers(dev);
1050         if (rb->count == 0) {
1051                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1052                 unset_initialised(dev);
1053                 dev->owner = NULL;
1054                 return 0;
1055         }
1056         dev->owner = filp;
1057
1058         /*FIXME If they ask for zero, we must stop streaming and free */
1059         if (rb->count < 3)
1060                 rb->count = 3;
1061         /* Arbitrary limit */
1062         else if (rb->count > 5)
1063                 rb->count = 5;
1064
1065         stk_allocate_buffers(dev, rb->count);
1066         rb->count = dev->n_sbufs;
1067         return 0;
1068 }
1069
1070 static int stk_vidioc_querybuf(struct file *filp,
1071                 void *priv, struct v4l2_buffer *buf)
1072 {
1073         struct stk_camera *dev = video_drvdata(filp);
1074         struct stk_sio_buffer *sbuf;
1075
1076         if (buf->index >= dev->n_sbufs)
1077                 return -EINVAL;
1078         sbuf = dev->sio_bufs + buf->index;
1079         *buf = sbuf->v4lbuf;
1080         return 0;
1081 }
1082
1083 static int stk_vidioc_qbuf(struct file *filp,
1084                 void *priv, struct v4l2_buffer *buf)
1085 {
1086         struct stk_camera *dev = video_drvdata(filp);
1087         struct stk_sio_buffer *sbuf;
1088         unsigned long flags;
1089
1090         if (buf->memory != V4L2_MEMORY_MMAP)
1091                 return -EINVAL;
1092
1093         if (buf->index >= dev->n_sbufs)
1094                 return -EINVAL;
1095         sbuf = dev->sio_bufs + buf->index;
1096         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1097                 return 0;
1098         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1099         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1100         spin_lock_irqsave(&dev->spinlock, flags);
1101         list_add_tail(&sbuf->list, &dev->sio_avail);
1102         *buf = sbuf->v4lbuf;
1103         spin_unlock_irqrestore(&dev->spinlock, flags);
1104         return 0;
1105 }
1106
1107 static int stk_vidioc_dqbuf(struct file *filp,
1108                 void *priv, struct v4l2_buffer *buf)
1109 {
1110         struct stk_camera *dev = video_drvdata(filp);
1111         struct stk_sio_buffer *sbuf;
1112         unsigned long flags;
1113         int ret;
1114
1115         if (!is_streaming(dev))
1116                 return -EINVAL;
1117
1118         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1119                 return -EWOULDBLOCK;
1120         ret = wait_event_interruptible(dev->wait_frame,
1121                 !list_empty(&dev->sio_full) || !is_present(dev));
1122         if (ret)
1123                 return ret;
1124         if (!is_present(dev))
1125                 return -EIO;
1126
1127         spin_lock_irqsave(&dev->spinlock, flags);
1128         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1129         list_del_init(&sbuf->list);
1130         spin_unlock_irqrestore(&dev->spinlock, flags);
1131         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1132         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1133         sbuf->v4lbuf.sequence = ++dev->sequence;
1134         v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1135
1136         *buf = sbuf->v4lbuf;
1137         return 0;
1138 }
1139
1140 static int stk_vidioc_streamon(struct file *filp,
1141                 void *priv, enum v4l2_buf_type type)
1142 {
1143         struct stk_camera *dev = video_drvdata(filp);
1144         if (is_streaming(dev))
1145                 return 0;
1146         if (dev->sio_bufs == NULL)
1147                 return -EINVAL;
1148         dev->sequence = 0;
1149         return stk_start_stream(dev);
1150 }
1151
1152 static int stk_vidioc_streamoff(struct file *filp,
1153                 void *priv, enum v4l2_buf_type type)
1154 {
1155         struct stk_camera *dev = video_drvdata(filp);
1156         unsigned long flags;
1157         int i;
1158         stk_stop_stream(dev);
1159         spin_lock_irqsave(&dev->spinlock, flags);
1160         INIT_LIST_HEAD(&dev->sio_avail);
1161         INIT_LIST_HEAD(&dev->sio_full);
1162         for (i = 0; i < dev->n_sbufs; i++) {
1163                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1164                 dev->sio_bufs[i].v4lbuf.flags = 0;
1165         }
1166         spin_unlock_irqrestore(&dev->spinlock, flags);
1167         return 0;
1168 }
1169
1170
1171 static int stk_vidioc_g_parm(struct file *filp,
1172                 void *priv, struct v4l2_streamparm *sp)
1173 {
1174         /*FIXME This is not correct */
1175         sp->parm.capture.timeperframe.numerator = 1;
1176         sp->parm.capture.timeperframe.denominator = 30;
1177         sp->parm.capture.readbuffers = 2;
1178         return 0;
1179 }
1180
1181 static int stk_vidioc_enum_framesizes(struct file *filp,
1182                 void *priv, struct v4l2_frmsizeenum *frms)
1183 {
1184         if (frms->index >= ARRAY_SIZE(stk_sizes))
1185                 return -EINVAL;
1186         switch (frms->pixel_format) {
1187         case V4L2_PIX_FMT_RGB565:
1188         case V4L2_PIX_FMT_RGB565X:
1189         case V4L2_PIX_FMT_UYVY:
1190         case V4L2_PIX_FMT_YUYV:
1191         case V4L2_PIX_FMT_SBGGR8:
1192                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1193                 frms->discrete.width = stk_sizes[frms->index].w;
1194                 frms->discrete.height = stk_sizes[frms->index].h;
1195                 return 0;
1196         default: return -EINVAL;
1197         }
1198 }
1199
1200 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1201         .s_ctrl = stk_s_ctrl,
1202 };
1203
1204 static struct v4l2_file_operations v4l_stk_fops = {
1205         .owner = THIS_MODULE,
1206         .open = v4l_stk_open,
1207         .release = v4l_stk_release,
1208         .read = v4l_stk_read,
1209         .poll = v4l_stk_poll,
1210         .mmap = v4l_stk_mmap,
1211         .unlocked_ioctl = video_ioctl2,
1212 };
1213
1214 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1215         .vidioc_querycap = stk_vidioc_querycap,
1216         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1217         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1218         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1219         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1220         .vidioc_enum_input = stk_vidioc_enum_input,
1221         .vidioc_s_input = stk_vidioc_s_input,
1222         .vidioc_g_input = stk_vidioc_g_input,
1223         .vidioc_reqbufs = stk_vidioc_reqbufs,
1224         .vidioc_querybuf = stk_vidioc_querybuf,
1225         .vidioc_qbuf = stk_vidioc_qbuf,
1226         .vidioc_dqbuf = stk_vidioc_dqbuf,
1227         .vidioc_streamon = stk_vidioc_streamon,
1228         .vidioc_streamoff = stk_vidioc_streamoff,
1229         .vidioc_g_parm = stk_vidioc_g_parm,
1230         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1231         .vidioc_log_status = v4l2_ctrl_log_status,
1232         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1233         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1234 };
1235
1236 static void stk_v4l_dev_release(struct video_device *vd)
1237 {
1238         struct stk_camera *dev = vdev_to_camera(vd);
1239
1240         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1241                 STK_ERROR("We are leaking memory\n");
1242         usb_put_intf(dev->interface);
1243         kfree(dev);
1244 }
1245
1246 static struct video_device stk_v4l_data = {
1247         .name = "stkwebcam",
1248         .fops = &v4l_stk_fops,
1249         .ioctl_ops = &v4l_stk_ioctl_ops,
1250         .release = stk_v4l_dev_release,
1251 };
1252
1253
1254 static int stk_register_video_device(struct stk_camera *dev)
1255 {
1256         int err;
1257
1258         dev->vdev = stk_v4l_data;
1259         dev->vdev.lock = &dev->lock;
1260         dev->vdev.debug = debug;
1261         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1262         set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
1263         video_set_drvdata(&dev->vdev, dev);
1264         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1265         if (err)
1266                 STK_ERROR("v4l registration failed\n");
1267         else
1268                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1269                          video_device_node_name(&dev->vdev));
1270         return err;
1271 }
1272
1273
1274 /* USB Stuff */
1275
1276 static int stk_camera_probe(struct usb_interface *interface,
1277                 const struct usb_device_id *id)
1278 {
1279         struct v4l2_ctrl_handler *hdl;
1280         int err = 0;
1281         int i;
1282
1283         struct stk_camera *dev = NULL;
1284         struct usb_device *udev = interface_to_usbdev(interface);
1285         struct usb_host_interface *iface_desc;
1286         struct usb_endpoint_descriptor *endpoint;
1287
1288         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1289         if (dev == NULL) {
1290                 STK_ERROR("Out of memory !\n");
1291                 return -ENOMEM;
1292         }
1293         err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1294         if (err < 0) {
1295                 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1296                 kfree(dev);
1297                 return err;
1298         }
1299         hdl = &dev->hdl;
1300         v4l2_ctrl_handler_init(hdl, 3);
1301         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1302                           V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1303         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1304                           V4L2_CID_HFLIP, 0, 1, 1, 1);
1305         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1306                           V4L2_CID_VFLIP, 0, 1, 1, 1);
1307         if (hdl->error) {
1308                 err = hdl->error;
1309                 dev_err(&udev->dev, "couldn't register control\n");
1310                 goto error;
1311         }
1312         dev->v4l2_dev.ctrl_handler = hdl;
1313
1314         spin_lock_init(&dev->spinlock);
1315         mutex_init(&dev->lock);
1316         init_waitqueue_head(&dev->wait_frame);
1317         dev->first_init = 1; /* webcam LED management */
1318
1319         dev->udev = udev;
1320         dev->interface = interface;
1321         usb_get_intf(interface);
1322
1323         if (hflip != -1)
1324                 dev->vsettings.hflip = hflip;
1325         else if (dmi_check_system(stk_upside_down_dmi_table))
1326                 dev->vsettings.hflip = 1;
1327         else
1328                 dev->vsettings.hflip = 0;
1329         if (vflip != -1)
1330                 dev->vsettings.vflip = vflip;
1331         else if (dmi_check_system(stk_upside_down_dmi_table))
1332                 dev->vsettings.vflip = 1;
1333         else
1334                 dev->vsettings.vflip = 0;
1335         dev->n_sbufs = 0;
1336         set_present(dev);
1337
1338         /* Set up the endpoint information
1339          * use only the first isoc-in endpoint
1340          * for the current alternate setting */
1341         iface_desc = interface->cur_altsetting;
1342
1343         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1344                 endpoint = &iface_desc->endpoint[i].desc;
1345
1346                 if (!dev->isoc_ep
1347                         && usb_endpoint_is_isoc_in(endpoint)) {
1348                         /* we found an isoc in endpoint */
1349                         dev->isoc_ep = usb_endpoint_num(endpoint);
1350                         break;
1351                 }
1352         }
1353         if (!dev->isoc_ep) {
1354                 STK_ERROR("Could not find isoc-in endpoint");
1355                 err = -ENODEV;
1356                 goto error;
1357         }
1358         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1359         dev->vsettings.mode = MODE_VGA;
1360         dev->frame_size = 640 * 480 * 2;
1361
1362         INIT_LIST_HEAD(&dev->sio_avail);
1363         INIT_LIST_HEAD(&dev->sio_full);
1364
1365         usb_set_intfdata(interface, dev);
1366
1367         err = stk_register_video_device(dev);
1368         if (err)
1369                 goto error;
1370
1371         return 0;
1372
1373 error:
1374         v4l2_ctrl_handler_free(hdl);
1375         v4l2_device_unregister(&dev->v4l2_dev);
1376         kfree(dev);
1377         return err;
1378 }
1379
1380 static void stk_camera_disconnect(struct usb_interface *interface)
1381 {
1382         struct stk_camera *dev = usb_get_intfdata(interface);
1383
1384         usb_set_intfdata(interface, NULL);
1385         unset_present(dev);
1386
1387         wake_up_interruptible(&dev->wait_frame);
1388
1389         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1390                  video_device_node_name(&dev->vdev));
1391
1392         video_unregister_device(&dev->vdev);
1393         v4l2_ctrl_handler_free(&dev->hdl);
1394         v4l2_device_unregister(&dev->v4l2_dev);
1395 }
1396
1397 #ifdef CONFIG_PM
1398 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1399 {
1400         struct stk_camera *dev = usb_get_intfdata(intf);
1401         if (is_streaming(dev)) {
1402                 stk_stop_stream(dev);
1403                 /* yes, this is ugly */
1404                 set_streaming(dev);
1405         }
1406         return 0;
1407 }
1408
1409 static int stk_camera_resume(struct usb_interface *intf)
1410 {
1411         struct stk_camera *dev = usb_get_intfdata(intf);
1412         if (!is_initialised(dev))
1413                 return 0;
1414         unset_initialised(dev);
1415         stk_initialise(dev);
1416         stk_camera_write_reg(dev, 0x0, 0x49);
1417         stk_setup_format(dev);
1418         if (is_streaming(dev))
1419                 stk_start_stream(dev);
1420         return 0;
1421 }
1422 #endif
1423
1424 static struct usb_driver stk_camera_driver = {
1425         .name = "stkwebcam",
1426         .probe = stk_camera_probe,
1427         .disconnect = stk_camera_disconnect,
1428         .id_table = stkwebcam_table,
1429 #ifdef CONFIG_PM
1430         .suspend = stk_camera_suspend,
1431         .resume = stk_camera_resume,
1432 #endif
1433 };
1434
1435 module_usb_driver(stk_camera_driver);