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
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/kernel.h>
  24 #include <linux/errno.h>
  25 #include <linux/slab.h>
  26
  27 #include <linux/dmi.h>
  28 #include <linux/usb.h>
  29 #include <linux/mm.h>
  30 #include <linux/vmalloc.h>
  31 #include <linux/videodev2.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-ioctl.h>
  34 #include <media/v4l2-event.h>
  35
  36 #include "stk-webcam.h"
  37
  38
  39 static int hflip = -1;
  40 module_param(hflip, int, 0444);
  41 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
  42
  43 static int vflip = -1;
  44 module_param(vflip, int, 0444);
  45 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
  46
  47 static int debug;
  48 module_param(debug, int, 0444);
  49 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
  50
  51 MODULE_LICENSE("GPL");
  52 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
  53 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
  54
  55 /* Some cameras have audio interfaces, we aren't interested in those */
  56 static struct usb_device_id stkwebcam_table[] = {
  57         { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
  58         { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
  59         { }
  60 };
  61 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
  62
  63 /*
  64  * The stk webcam laptop module is mounted upside down in some laptops :(
  65  *
  66  * Some background information (thanks to Hans de Goede for providing this):
  67  *
  68  * 1) Once upon a time the stkwebcam driver was written
  69  *
  70  * 2) The webcam in question was used mostly in Asus laptop models, including
  71  * the laptop of the original author of the driver, and in these models, in
  72  * typical Asus fashion (see the long long list for uvc cams inside v4l-utils),
  73  * they mounted the webcam-module the wrong way up. So the hflip and vflip
  74  * module options were given a default value of 1 (the correct value for
  75  * upside down mounted models)
  76  *
  77  * 3) Years later I got a bug report from a user with a laptop with stkwebcam,
  78  * where the module was actually mounted the right way up, and thus showed
  79  * upside down under Linux. So now I was facing the choice of 2 options:
  80  *
  81  * a) Add a not-upside-down list to stkwebcam, which overrules the default.
  82  *
  83  * b) Do it like all the other drivers do, and make the default right for
  84  *    cams mounted the proper way and add an upside-down model list, with
  85  *    models where we need to flip-by-default.
  86  *
  87  * Despite knowing that going b) would cause a period of pain where we were
  88  * building the table I opted to go for option b), since a) is just too ugly,
  89  * and worse different from how every other driver does it leading to
  90  * confusion in the long run. This change was made in kernel 3.6.
  91  *
  92  * So for any user report about upside-down images since kernel 3.6 ask them
  93  * to provide the output of 'sudo dmidecode' so the laptop can be added in
  94  * the table below.
  95  */
  96 static const struct dmi_system_id stk_upside_down_dmi_table[] = {
  97         {
  98                 .ident = "ASUS G1",
  99                 .matches = {
 100                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 101                         DMI_MATCH(DMI_PRODUCT_NAME, "G1")
 102                 }
 103         }, {
 104                 .ident = "ASUS F3JC",
 105                 .matches = {
 106                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 107                         DMI_MATCH(DMI_PRODUCT_NAME, "F3JC")
 108                 }
 109         },
 110         {
 111                 .ident = "T12Rg-H",
 112                 .matches = {
 113                         DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"),
 114                         DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H")
 115                 }
 116         },
 117         {}
 118 };
 119
 120
 121 /*
 122  * Basic stuff
 123  */
 124 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
 125 {
 126         struct usb_device *udev = dev->udev;
 127         int ret;
 128
 129         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 130                         0x01,
 131                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 132                         value,
 133                         index,
 134                         NULL,
 135                         0,
 136                         500);
 137         if (ret < 0)
 138                 return ret;
 139         else
 140                 return 0;
 141 }
 142
 143 int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value)
 144 {
 145         struct usb_device *udev = dev->udev;
 146         unsigned char *buf;
 147         int ret;
 148
 149         buf = kmalloc(sizeof(u8), GFP_KERNEL);
 150         if (!buf)
 151                 return -ENOMEM;
 152
 153         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 154                         0x00,
 155                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 156                         0x00,
 157                         index,
 158                         buf,
 159                         sizeof(u8),
 160                         500);
 161         if (ret >= 0)
 162                 *value = *buf;
 163
 164         kfree(buf);
 165         return ret;
 166 }
 167
 168 static int stk_start_stream(struct stk_camera *dev)
 169 {
 170         u8 value;
 171         int i, ret;
 172         u8 value_116, value_117;
 173
 174
 175         if (!is_present(dev))
 176                 return -ENODEV;
 177         if (!is_memallocd(dev) || !is_initialised(dev)) {
 178                 STK_ERROR("FIXME: Buffers are not allocated\n");
 179                 return -EFAULT;
 180         }
 181         ret = usb_set_interface(dev->udev, 0, 5);
 182
 183         if (ret < 0)
 184                 STK_ERROR("usb_set_interface failed !\n");
 185         if (stk_sensor_wakeup(dev))
 186                 STK_ERROR("error awaking the sensor\n");
 187
 188         stk_camera_read_reg(dev, 0x0116, &value_116);
 189         stk_camera_read_reg(dev, 0x0117, &value_117);
 190
 191         stk_camera_write_reg(dev, 0x0116, 0x0000);
 192         stk_camera_write_reg(dev, 0x0117, 0x0000);
 193
 194         stk_camera_read_reg(dev, 0x0100, &value);
 195         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 196
 197         stk_camera_write_reg(dev, 0x0116, value_116);
 198         stk_camera_write_reg(dev, 0x0117, value_117);
 199         for (i = 0; i < MAX_ISO_BUFS; i++) {
 200                 if (dev->isobufs[i].urb) {
 201                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 202                         atomic_inc(&dev->urbs_used);
 203                         if (ret)
 204                                 return ret;
 205                 }
 206         }
 207         set_streaming(dev);
 208         return 0;
 209 }
 210
 211 static int stk_stop_stream(struct stk_camera *dev)
 212 {
 213         u8 value;
 214         int i;
 215         if (is_present(dev)) {
 216                 stk_camera_read_reg(dev, 0x0100, &value);
 217                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 218                 if (dev->isobufs != NULL) {
 219                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 220                                 if (dev->isobufs[i].urb)
 221                                         usb_kill_urb(dev->isobufs[i].urb);
 222                         }
 223                 }
 224                 unset_streaming(dev);
 225
 226                 if (usb_set_interface(dev->udev, 0, 0))
 227                         STK_ERROR("usb_set_interface failed !\n");
 228                 if (stk_sensor_sleep(dev))
 229                         STK_ERROR("error suspending the sensor\n");
 230         }
 231         return 0;
 232 }
 233
 234 /*
 235  * This seems to be the shortest init sequence we
 236  * must do in order to find the sensor
 237  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 238  * is also reset. Maybe powers down it?
 239  * Rest of values don't make a difference
 240  */
 241
 242 static struct regval stk1125_initvals[] = {
 243         /*TODO: What means this sequence? */
 244         {0x0000, 0x24},
 245         {0x0100, 0x21},
 246         {0x0002, 0x68},
 247         {0x0003, 0x80},
 248         {0x0005, 0x00},
 249         {0x0007, 0x03},
 250         {0x000d, 0x00},
 251         {0x000f, 0x02},
 252         {0x0300, 0x12},
 253         {0x0350, 0x41},
 254         {0x0351, 0x00},
 255         {0x0352, 0x00},
 256         {0x0353, 0x00},
 257         {0x0018, 0x10},
 258         {0x0019, 0x00},
 259         {0x001b, 0x0e},
 260         {0x001c, 0x46},
 261         {0x0300, 0x80},
 262         {0x001a, 0x04},
 263         {0x0110, 0x00},
 264         {0x0111, 0x00},
 265         {0x0112, 0x00},
 266         {0x0113, 0x00},
 267
 268         {0xffff, 0xff},
 269 };
 270
 271
 272 static int stk_initialise(struct stk_camera *dev)
 273 {
 274         struct regval *rv;
 275         int ret;
 276         if (!is_present(dev))
 277                 return -ENODEV;
 278         if (is_initialised(dev))
 279                 return 0;
 280         rv = stk1125_initvals;
 281         while (rv->reg != 0xffff) {
 282                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 283                 if (ret)
 284                         return ret;
 285                 rv++;
 286         }
 287         if (stk_sensor_init(dev) == 0) {
 288                 set_initialised(dev);
 289                 return 0;
 290         } else
 291                 return -1;
 292 }
 293
 294 /* *********************************************** */
 295 /*
 296  * This function is called as an URB transfert is complete (Isochronous pipe).
 297  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 298  * and not stall. Neat.
 299  */
 300 static void stk_isoc_handler(struct urb *urb)
 301 {
 302         int i;
 303         int ret;
 304         int framelen;
 305         unsigned long flags;
 306
 307         unsigned char *fill = NULL;
 308         unsigned char *iso_buf = NULL;
 309
 310         struct stk_camera *dev;
 311         struct stk_sio_buffer *fb;
 312
 313         dev = (struct stk_camera *) urb->context;
 314
 315         if (dev == NULL) {
 316                 STK_ERROR("isoc_handler called with NULL device !\n");
 317                 return;
 318         }
 319
 320         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 321                 || urb->status == -ESHUTDOWN) {
 322                 atomic_dec(&dev->urbs_used);
 323                 return;
 324         }
 325
 326         spin_lock_irqsave(&dev->spinlock, flags);
 327
 328         if (urb->status != -EINPROGRESS && urb->status != 0) {
 329                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 330                 goto resubmit;
 331         }
 332
 333         if (list_empty(&dev->sio_avail)) {
 334                 /*FIXME Stop streaming after a while */
 335                 (void) (printk_ratelimit() &&
 336                 STK_ERROR("isoc_handler without available buffer!\n"));
 337                 goto resubmit;
 338         }
 339         fb = list_first_entry(&dev->sio_avail,
 340                         struct stk_sio_buffer, list);
 341         fill = fb->buffer + fb->v4lbuf.bytesused;
 342
 343         for (i = 0; i < urb->number_of_packets; i++) {
 344                 if (urb->iso_frame_desc[i].status != 0) {
 345                         if (urb->iso_frame_desc[i].status != -EXDEV)
 346                                 STK_ERROR("Frame %d has error %d\n", i,
 347                                         urb->iso_frame_desc[i].status);
 348                         continue;
 349                 }
 350                 framelen = urb->iso_frame_desc[i].actual_length;
 351                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 352
 353                 if (framelen <= 4)
 354                         continue; /* no data */
 355
 356                 /*
 357                  * we found something informational from there
 358                  * the isoc frames have to type of headers
 359                  * type1: 00 xx 00 00 or 20 xx 00 00
 360                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 361                  * xx is a sequencer which has never been seen over 0x3f
 362                  * imho data written down looks like bayer, i see similarities
 363                  * after every 640 bytes
 364                  */
 365                 if (*iso_buf & 0x80) {
 366                         framelen -= 8;
 367                         iso_buf += 8;
 368                         /* This marks a new frame */
 369                         if (fb->v4lbuf.bytesused != 0
 370                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 371                                 (void) (printk_ratelimit() &&
 372                                 STK_ERROR("frame %d, bytesused=%d, skipping\n",
 373                                         i, fb->v4lbuf.bytesused));
 374                                 fb->v4lbuf.bytesused = 0;
 375                                 fill = fb->buffer;
 376                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 377                                 if (list_is_singular(&dev->sio_avail)) {
 378                                         /* Always reuse the last buffer */
 379                                         fb->v4lbuf.bytesused = 0;
 380                                         fill = fb->buffer;
 381                                 } else {
 382                                         list_move_tail(dev->sio_avail.next,
 383                                                 &dev->sio_full);
 384                                         wake_up(&dev->wait_frame);
 385                                         fb = list_first_entry(&dev->sio_avail,
 386                                                 struct stk_sio_buffer, list);
 387                                         fb->v4lbuf.bytesused = 0;
 388                                         fill = fb->buffer;
 389                                 }
 390                         }
 391                 } else {
 392                         framelen -= 4;
 393                         iso_buf += 4;
 394                 }
 395
 396                 /* Our buffer is full !!! */
 397                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 398                         (void) (printk_ratelimit() &&
 399                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 400                         /*FIXME Do something here? */
 401                         continue;
 402                 }
 403                 spin_unlock_irqrestore(&dev->spinlock, flags);
 404                 memcpy(fill, iso_buf, framelen);
 405                 spin_lock_irqsave(&dev->spinlock, flags);
 406                 fill += framelen;
 407
 408                 /* New size of our buffer */
 409                 fb->v4lbuf.bytesused += framelen;
 410         }
 411
 412 resubmit:
 413         spin_unlock_irqrestore(&dev->spinlock, flags);
 414         urb->dev = dev->udev;
 415         ret = usb_submit_urb(urb, GFP_ATOMIC);
 416         if (ret != 0) {
 417                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 418                         ret);
 419         }
 420 }
 421
 422 /* -------------------------------------------- */
 423
 424 static int stk_prepare_iso(struct stk_camera *dev)
 425 {
 426         void *kbuf;
 427         int i, j;
 428         struct urb *urb;
 429         struct usb_device *udev;
 430
 431         if (dev == NULL)
 432                 return -ENXIO;
 433         udev = dev->udev;
 434
 435         if (dev->isobufs)
 436                 STK_ERROR("isobufs already allocated. Bad\n");
 437         else
 438                 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
 439                                        GFP_KERNEL);
 440         if (dev->isobufs == NULL) {
 441                 STK_ERROR("Unable to allocate iso buffers\n");
 442                 return -ENOMEM;
 443         }
 444         for (i = 0; i < MAX_ISO_BUFS; i++) {
 445                 if (dev->isobufs[i].data == NULL) {
 446                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 447                         if (kbuf == NULL) {
 448                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 449                                         i);
 450                                 goto isobufs_out;
 451                         }
 452                         dev->isobufs[i].data = kbuf;
 453                 } else
 454                         STK_ERROR("isobuf data already allocated\n");
 455                 if (dev->isobufs[i].urb == NULL) {
 456                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 457                         if (urb == NULL)
 458                                 goto isobufs_out;
 459                         dev->isobufs[i].urb = urb;
 460                 } else {
 461                         STK_ERROR("Killing URB\n");
 462                         usb_kill_urb(dev->isobufs[i].urb);
 463                         urb = dev->isobufs[i].urb;
 464                 }
 465                 urb->interval = 1;
 466                 urb->dev = udev;
 467                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 468                 urb->transfer_flags = URB_ISO_ASAP;
 469                 urb->transfer_buffer = dev->isobufs[i].data;
 470                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 471                 urb->complete = stk_isoc_handler;
 472                 urb->context = dev;
 473                 urb->start_frame = 0;
 474                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 475
 476                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 477                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 478                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 479                 }
 480         }
 481         set_memallocd(dev);
 482         return 0;
 483
 484 isobufs_out:
 485         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 486                 kfree(dev->isobufs[i].data);
 487         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 488                 usb_free_urb(dev->isobufs[i].urb);
 489         kfree(dev->isobufs);
 490         dev->isobufs = NULL;
 491         return -ENOMEM;
 492 }
 493
 494 static void stk_clean_iso(struct stk_camera *dev)
 495 {
 496         int i;
 497
 498         if (dev == NULL || dev->isobufs == NULL)
 499                 return;
 500
 501         for (i = 0; i < MAX_ISO_BUFS; i++) {
 502                 struct urb *urb;
 503
 504                 urb = dev->isobufs[i].urb;
 505                 if (urb) {
 506                         if (atomic_read(&dev->urbs_used) && is_present(dev))
 507                                 usb_kill_urb(urb);
 508                         usb_free_urb(urb);
 509                 }
 510                 kfree(dev->isobufs[i].data);
 511         }
 512         kfree(dev->isobufs);
 513         dev->isobufs = NULL;
 514         unset_memallocd(dev);
 515 }
 516
 517 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 518 {
 519         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 520         INIT_LIST_HEAD(&buf->list);
 521         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 522         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 523         if (buf->buffer == NULL)
 524                 return -ENOMEM;
 525         buf->mapcount = 0;
 526         buf->dev = dev;
 527         buf->v4lbuf.index = index;
 528         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 529         buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 530         buf->v4lbuf.field = V4L2_FIELD_NONE;
 531         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 532         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 533         return 0;
 534 }
 535
 536 static int stk_free_sio_buffers(struct stk_camera *dev)
 537 {
 538         int i;
 539         int nbufs;
 540         unsigned long flags;
 541         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 542                 return 0;
 543         /*
 544         * If any buffers are mapped, we cannot free them at all.
 545         */
 546         for (i = 0; i < dev->n_sbufs; i++) {
 547                 if (dev->sio_bufs[i].mapcount > 0)
 548                         return -EBUSY;
 549         }
 550         /*
 551         * OK, let's do it.
 552         */
 553         spin_lock_irqsave(&dev->spinlock, flags);
 554         INIT_LIST_HEAD(&dev->sio_avail);
 555         INIT_LIST_HEAD(&dev->sio_full);
 556         nbufs = dev->n_sbufs;
 557         dev->n_sbufs = 0;
 558         spin_unlock_irqrestore(&dev->spinlock, flags);
 559         for (i = 0; i < nbufs; i++)
 560                 vfree(dev->sio_bufs[i].buffer);
 561         kfree(dev->sio_bufs);
 562         dev->sio_bufs = NULL;
 563         return 0;
 564 }
 565
 566 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 567 {
 568         int i;
 569         if (dev->sio_bufs != NULL)
 570                 STK_ERROR("sio_bufs already allocated\n");
 571         else {
 572                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 573                                 GFP_KERNEL);
 574                 if (dev->sio_bufs == NULL)
 575                         return -ENOMEM;
 576                 for (i = 0; i < n_sbufs; i++) {
 577                         if (stk_setup_siobuf(dev, i))
 578                                 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
 579                         dev->n_sbufs = i+1;
 580                 }
 581         }
 582         return 0;
 583 }
 584
 585 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 586 {
 587         int err;
 588         err = stk_prepare_iso(dev);
 589         if (err) {
 590                 stk_clean_iso(dev);
 591                 return err;
 592         }
 593         err = stk_prepare_sio_buffers(dev, n_sbufs);
 594         if (err) {
 595                 stk_free_sio_buffers(dev);
 596                 return err;
 597         }
 598         return 0;
 599 }
 600
 601 static void stk_free_buffers(struct stk_camera *dev)
 602 {
 603         stk_clean_iso(dev);
 604         stk_free_sio_buffers(dev);
 605 }
 606 /* -------------------------------------------- */
 607
 608 /* v4l file operations */
 609
 610 static int v4l_stk_open(struct file *fp)
 611 {
 612         struct stk_camera *dev = video_drvdata(fp);
 613         int err;
 614
 615         if (dev == NULL || !is_present(dev))
 616                 return -ENXIO;
 617
 618         if (mutex_lock_interruptible(&dev->lock))
 619                 return -ERESTARTSYS;
 620         if (!dev->first_init)
 621                 stk_camera_write_reg(dev, 0x0, 0x24);
 622         else
 623                 dev->first_init = 0;
 624
 625         err = v4l2_fh_open(fp);
 626         if (!err)
 627                 usb_autopm_get_interface(dev->interface);
 628         mutex_unlock(&dev->lock);
 629         return err;
 630 }
 631
 632 static int v4l_stk_release(struct file *fp)
 633 {
 634         struct stk_camera *dev = video_drvdata(fp);
 635
 636         mutex_lock(&dev->lock);
 637         if (dev->owner == fp) {
 638                 stk_stop_stream(dev);
 639                 stk_free_buffers(dev);
 640                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
 641                 unset_initialised(dev);
 642                 dev->owner = NULL;
 643         }
 644
 645         if (is_present(dev))
 646                 usb_autopm_put_interface(dev->interface);
 647         mutex_unlock(&dev->lock);
 648         return v4l2_fh_release(fp);
 649 }
 650
 651 static ssize_t stk_read(struct file *fp, char __user *buf,
 652                 size_t count, loff_t *f_pos)
 653 {
 654         int i;
 655         int ret;
 656         unsigned long flags;
 657         struct stk_sio_buffer *sbuf;
 658         struct stk_camera *dev = video_drvdata(fp);
 659
 660         if (!is_present(dev))
 661                 return -EIO;
 662         if (dev->owner && (!dev->reading || dev->owner != fp))
 663                 return -EBUSY;
 664         dev->owner = fp;
 665         if (!is_streaming(dev)) {
 666                 if (stk_initialise(dev)
 667                         || stk_allocate_buffers(dev, 3)
 668                         || stk_start_stream(dev))
 669                         return -ENOMEM;
 670                 dev->reading = 1;
 671                 spin_lock_irqsave(&dev->spinlock, flags);
 672                 for (i = 0; i < dev->n_sbufs; i++) {
 673                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 674                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 675                 }
 676                 spin_unlock_irqrestore(&dev->spinlock, flags);
 677         }
 678         if (*f_pos == 0) {
 679                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 680                         return -EWOULDBLOCK;
 681                 ret = wait_event_interruptible(dev->wait_frame,
 682                         !list_empty(&dev->sio_full) || !is_present(dev));
 683                 if (ret)
 684                         return ret;
 685                 if (!is_present(dev))
 686                         return -EIO;
 687         }
 688         if (count + *f_pos > dev->frame_size)
 689                 count = dev->frame_size - *f_pos;
 690         spin_lock_irqsave(&dev->spinlock, flags);
 691         if (list_empty(&dev->sio_full)) {
 692                 spin_unlock_irqrestore(&dev->spinlock, flags);
 693                 STK_ERROR("BUG: No siobufs ready\n");
 694                 return 0;
 695         }
 696         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 697         spin_unlock_irqrestore(&dev->spinlock, flags);
 698
 699         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 700                 return -EFAULT;
 701
 702         *f_pos += count;
 703
 704         if (*f_pos >= dev->frame_size) {
 705                 *f_pos = 0;
 706                 spin_lock_irqsave(&dev->spinlock, flags);
 707                 list_move_tail(&sbuf->list, &dev->sio_avail);
 708                 spin_unlock_irqrestore(&dev->spinlock, flags);
 709         }
 710         return count;
 711 }
 712
 713 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 714                 size_t count, loff_t *f_pos)
 715 {
 716         struct stk_camera *dev = video_drvdata(fp);
 717         int ret;
 718
 719         if (mutex_lock_interruptible(&dev->lock))
 720                 return -ERESTARTSYS;
 721         ret = stk_read(fp, buf, count, f_pos);
 722         mutex_unlock(&dev->lock);
 723         return ret;
 724 }
 725
 726 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 727 {
 728         struct stk_camera *dev = video_drvdata(fp);
 729         unsigned res = v4l2_ctrl_poll(fp, wait);
 730
 731         poll_wait(fp, &dev->wait_frame, wait);
 732
 733         if (!is_present(dev))
 734                 return POLLERR;
 735
 736         if (!list_empty(&dev->sio_full))
 737                 return res | POLLIN | POLLRDNORM;
 738
 739         return res;
 740 }
 741
 742
 743 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 744 {
 745         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 746         sbuf->mapcount++;
 747 }
 748 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 749 {
 750         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 751         sbuf->mapcount--;
 752         if (sbuf->mapcount == 0)
 753                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 754 }
 755 static const struct vm_operations_struct stk_v4l_vm_ops = {
 756         .open = stk_v4l_vm_open,
 757         .close = stk_v4l_vm_close
 758 };
 759
 760 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 761 {
 762         unsigned int i;
 763         int ret;
 764         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 765         struct stk_camera *dev = video_drvdata(fp);
 766         struct stk_sio_buffer *sbuf = NULL;
 767
 768         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 769                 return -EINVAL;
 770
 771         for (i = 0; i < dev->n_sbufs; i++) {
 772                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 773                         sbuf = dev->sio_bufs + i;
 774                         break;
 775                 }
 776         }
 777         if (sbuf == NULL)
 778                 return -EINVAL;
 779         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 780         if (ret)
 781                 return ret;
 782         vma->vm_flags |= VM_DONTEXPAND;
 783         vma->vm_private_data = sbuf;
 784         vma->vm_ops = &stk_v4l_vm_ops;
 785         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 786         stk_v4l_vm_open(vma);
 787         return 0;
 788 }
 789
 790 /* v4l ioctl handlers */
 791
 792 static int stk_vidioc_querycap(struct file *filp,
 793                 void *priv, struct v4l2_capability *cap)
 794 {
 795         struct stk_camera *dev = video_drvdata(filp);
 796
 797         strcpy(cap->driver, "stk");
 798         strcpy(cap->card, "stk");
 799         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 800
 801         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
 802                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 803         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 804         return 0;
 805 }
 806
 807 static int stk_vidioc_enum_input(struct file *filp,
 808                 void *priv, struct v4l2_input *input)
 809 {
 810         if (input->index != 0)
 811                 return -EINVAL;
 812
 813         strcpy(input->name, "Syntek USB Camera");
 814         input->type = V4L2_INPUT_TYPE_CAMERA;
 815         return 0;
 816 }
 817
 818
 819 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 820 {
 821         *i = 0;
 822         return 0;
 823 }
 824
 825 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 826 {
 827         return i ? -EINVAL : 0;
 828 }
 829
 830 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
 831 {
 832         struct stk_camera *dev =
 833                 container_of(ctrl->handler, struct stk_camera, hdl);
 834
 835         switch (ctrl->id) {
 836         case V4L2_CID_BRIGHTNESS:
 837                 return stk_sensor_set_brightness(dev, ctrl->val);
 838         case V4L2_CID_HFLIP:
 839                 if (dmi_check_system(stk_upside_down_dmi_table))
 840                         dev->vsettings.hflip = !ctrl->val;
 841                 else
 842                         dev->vsettings.hflip = ctrl->val;
 843                 return 0;
 844         case V4L2_CID_VFLIP:
 845                 if (dmi_check_system(stk_upside_down_dmi_table))
 846                         dev->vsettings.vflip = !ctrl->val;
 847                 else
 848                         dev->vsettings.vflip = ctrl->val;
 849                 return 0;
 850         default:
 851                 return -EINVAL;
 852         }
 853         return 0;
 854 }
 855
 856
 857 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 858                 void *priv, struct v4l2_fmtdesc *fmtd)
 859 {
 860         switch (fmtd->index) {
 861         case 0:
 862                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 863                 strcpy(fmtd->description, "r5g6b5");
 864                 break;
 865         case 1:
 866                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 867                 strcpy(fmtd->description, "r5g6b5BE");
 868                 break;
 869         case 2:
 870                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 871                 strcpy(fmtd->description, "yuv4:2:2");
 872                 break;
 873         case 3:
 874                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 875                 strcpy(fmtd->description, "Raw bayer");
 876                 break;
 877         case 4:
 878                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 879                 strcpy(fmtd->description, "yuv4:2:2");
 880                 break;
 881         default:
 882                 return -EINVAL;
 883         }
 884         return 0;
 885 }
 886
 887 static struct stk_size {
 888         unsigned w;
 889         unsigned h;
 890         enum stk_mode m;
 891 } stk_sizes[] = {
 892         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 893         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 894         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 895         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 896         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 897 };
 898
 899 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 900                 void *priv, struct v4l2_format *f)
 901 {
 902         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 903         struct stk_camera *dev = video_drvdata(filp);
 904         int i;
 905
 906         for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
 907                         stk_sizes[i].m != dev->vsettings.mode; i++)
 908                 ;
 909         if (i == ARRAY_SIZE(stk_sizes)) {
 910                 STK_ERROR("ERROR: mode invalid\n");
 911                 return -EINVAL;
 912         }
 913         pix_format->width = stk_sizes[i].w;
 914         pix_format->height = stk_sizes[i].h;
 915         pix_format->field = V4L2_FIELD_NONE;
 916         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 917         pix_format->pixelformat = dev->vsettings.palette;
 918         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 919                 pix_format->bytesperline = pix_format->width;
 920         else
 921                 pix_format->bytesperline = 2 * pix_format->width;
 922         pix_format->sizeimage = pix_format->bytesperline
 923                                 * pix_format->height;
 924         return 0;
 925 }
 926
 927 static int stk_try_fmt_vid_cap(struct file *filp,
 928                 struct v4l2_format *fmtd, int *idx)
 929 {
 930         int i;
 931         switch (fmtd->fmt.pix.pixelformat) {
 932         case V4L2_PIX_FMT_RGB565:
 933         case V4L2_PIX_FMT_RGB565X:
 934         case V4L2_PIX_FMT_UYVY:
 935         case V4L2_PIX_FMT_YUYV:
 936         case V4L2_PIX_FMT_SBGGR8:
 937                 break;
 938         default:
 939                 return -EINVAL;
 940         }
 941         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
 942                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
 943                         break;
 944         }
 945         if (i == ARRAY_SIZE(stk_sizes)
 946                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
 947                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
 948                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
 949                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
 950                 if (idx)
 951                         *idx = i - 1;
 952         } else {
 953                 fmtd->fmt.pix.height = stk_sizes[i].h;
 954                 fmtd->fmt.pix.width = stk_sizes[i].w;
 955                 if (idx)
 956                         *idx = i;
 957         }
 958
 959         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
 960         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 961         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
 962                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
 963         else
 964                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
 965         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
 966                 * fmtd->fmt.pix.height;
 967         return 0;
 968 }
 969
 970 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
 971                 void *priv, struct v4l2_format *fmtd)
 972 {
 973         return stk_try_fmt_vid_cap(filp, fmtd, NULL);
 974 }
 975
 976 static int stk_setup_format(struct stk_camera *dev)
 977 {
 978         int i = 0;
 979         int depth;
 980         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 981                 depth = 1;
 982         else
 983                 depth = 2;
 984         while (i < ARRAY_SIZE(stk_sizes) &&
 985                         stk_sizes[i].m != dev->vsettings.mode)
 986                 i++;
 987         if (i == ARRAY_SIZE(stk_sizes)) {
 988                 STK_ERROR("Something is broken in %s\n", __func__);
 989                 return -EFAULT;
 990         }
 991         /* This registers controls some timings, not sure of what. */
 992         stk_camera_write_reg(dev, 0x001b, 0x0e);
 993         if (dev->vsettings.mode == MODE_SXGA)
 994                 stk_camera_write_reg(dev, 0x001c, 0x0e);
 995         else
 996                 stk_camera_write_reg(dev, 0x001c, 0x46);
 997         /*
 998          * Registers 0x0115 0x0114 are the size of each line (bytes),
 999          * regs 0x0117 0x0116 are the heigth of the image.
1000          */
1001         stk_camera_write_reg(dev, 0x0115,
1002                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1003         stk_camera_write_reg(dev, 0x0114,
1004                 (stk_sizes[i].w * depth) & 0xff);
1005         stk_camera_write_reg(dev, 0x0117,
1006                 (stk_sizes[i].h >> 8) & 0xff);
1007         stk_camera_write_reg(dev, 0x0116,
1008                 stk_sizes[i].h & 0xff);
1009         return stk_sensor_configure(dev);
1010 }
1011
1012 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1013                 void *priv, struct v4l2_format *fmtd)
1014 {
1015         int ret;
1016         int idx;
1017         struct stk_camera *dev = video_drvdata(filp);
1018
1019         if (dev == NULL)
1020                 return -ENODEV;
1021         if (!is_present(dev))
1022                 return -ENODEV;
1023         if (is_streaming(dev))
1024                 return -EBUSY;
1025         if (dev->owner)
1026                 return -EBUSY;
1027         ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1028         if (ret)
1029                 return ret;
1030
1031         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1032         stk_free_buffers(dev);
1033         dev->frame_size = fmtd->fmt.pix.sizeimage;
1034         dev->vsettings.mode = stk_sizes[idx].m;
1035
1036         stk_initialise(dev);
1037         return stk_setup_format(dev);
1038 }
1039
1040 static int stk_vidioc_reqbufs(struct file *filp,
1041                 void *priv, struct v4l2_requestbuffers *rb)
1042 {
1043         struct stk_camera *dev = video_drvdata(filp);
1044
1045         if (dev == NULL)
1046                 return -ENODEV;
1047         if (rb->memory != V4L2_MEMORY_MMAP)
1048                 return -EINVAL;
1049         if (is_streaming(dev)
1050                 || (dev->owner && dev->owner != filp))
1051                 return -EBUSY;
1052         stk_free_buffers(dev);
1053         if (rb->count == 0) {
1054                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1055                 unset_initialised(dev);
1056                 dev->owner = NULL;
1057                 return 0;
1058         }
1059         dev->owner = filp;
1060
1061         /*FIXME If they ask for zero, we must stop streaming and free */
1062         if (rb->count < 3)
1063                 rb->count = 3;
1064         /* Arbitrary limit */
1065         else if (rb->count > 5)
1066                 rb->count = 5;
1067
1068         stk_allocate_buffers(dev, rb->count);
1069         rb->count = dev->n_sbufs;
1070         return 0;
1071 }
1072
1073 static int stk_vidioc_querybuf(struct file *filp,
1074                 void *priv, struct v4l2_buffer *buf)
1075 {
1076         struct stk_camera *dev = video_drvdata(filp);
1077         struct stk_sio_buffer *sbuf;
1078
1079         if (buf->index >= dev->n_sbufs)
1080                 return -EINVAL;
1081         sbuf = dev->sio_bufs + buf->index;
1082         *buf = sbuf->v4lbuf;
1083         return 0;
1084 }
1085
1086 static int stk_vidioc_qbuf(struct file *filp,
1087                 void *priv, struct v4l2_buffer *buf)
1088 {
1089         struct stk_camera *dev = video_drvdata(filp);
1090         struct stk_sio_buffer *sbuf;
1091         unsigned long flags;
1092
1093         if (buf->memory != V4L2_MEMORY_MMAP)
1094                 return -EINVAL;
1095
1096         if (buf->index >= dev->n_sbufs)
1097                 return -EINVAL;
1098         sbuf = dev->sio_bufs + buf->index;
1099         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1100                 return 0;
1101         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1102         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1103         spin_lock_irqsave(&dev->spinlock, flags);
1104         list_add_tail(&sbuf->list, &dev->sio_avail);
1105         *buf = sbuf->v4lbuf;
1106         spin_unlock_irqrestore(&dev->spinlock, flags);
1107         return 0;
1108 }
1109
1110 static int stk_vidioc_dqbuf(struct file *filp,
1111                 void *priv, struct v4l2_buffer *buf)
1112 {
1113         struct stk_camera *dev = video_drvdata(filp);
1114         struct stk_sio_buffer *sbuf;
1115         unsigned long flags;
1116         int ret;
1117
1118         if (!is_streaming(dev))
1119                 return -EINVAL;
1120
1121         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1122                 return -EWOULDBLOCK;
1123         ret = wait_event_interruptible(dev->wait_frame,
1124                 !list_empty(&dev->sio_full) || !is_present(dev));
1125         if (ret)
1126                 return ret;
1127         if (!is_present(dev))
1128                 return -EIO;
1129
1130         spin_lock_irqsave(&dev->spinlock, flags);
1131         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1132         list_del_init(&sbuf->list);
1133         spin_unlock_irqrestore(&dev->spinlock, flags);
1134         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1135         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1136         sbuf->v4lbuf.sequence = ++dev->sequence;
1137         v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1138
1139         *buf = sbuf->v4lbuf;
1140         return 0;
1141 }
1142
1143 static int stk_vidioc_streamon(struct file *filp,
1144                 void *priv, enum v4l2_buf_type type)
1145 {
1146         struct stk_camera *dev = video_drvdata(filp);
1147         if (is_streaming(dev))
1148                 return 0;
1149         if (dev->sio_bufs == NULL)
1150                 return -EINVAL;
1151         dev->sequence = 0;
1152         return stk_start_stream(dev);
1153 }
1154
1155 static int stk_vidioc_streamoff(struct file *filp,
1156                 void *priv, enum v4l2_buf_type type)
1157 {
1158         struct stk_camera *dev = video_drvdata(filp);
1159         unsigned long flags;
1160         int i;
1161         stk_stop_stream(dev);
1162         spin_lock_irqsave(&dev->spinlock, flags);
1163         INIT_LIST_HEAD(&dev->sio_avail);
1164         INIT_LIST_HEAD(&dev->sio_full);
1165         for (i = 0; i < dev->n_sbufs; i++) {
1166                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1167                 dev->sio_bufs[i].v4lbuf.flags = 0;
1168         }
1169         spin_unlock_irqrestore(&dev->spinlock, flags);
1170         return 0;
1171 }
1172
1173
1174 static int stk_vidioc_g_parm(struct file *filp,
1175                 void *priv, struct v4l2_streamparm *sp)
1176 {
1177         /*FIXME This is not correct */
1178         sp->parm.capture.timeperframe.numerator = 1;
1179         sp->parm.capture.timeperframe.denominator = 30;
1180         sp->parm.capture.readbuffers = 2;
1181         return 0;
1182 }
1183
1184 static int stk_vidioc_enum_framesizes(struct file *filp,
1185                 void *priv, struct v4l2_frmsizeenum *frms)
1186 {
1187         if (frms->index >= ARRAY_SIZE(stk_sizes))
1188                 return -EINVAL;
1189         switch (frms->pixel_format) {
1190         case V4L2_PIX_FMT_RGB565:
1191         case V4L2_PIX_FMT_RGB565X:
1192         case V4L2_PIX_FMT_UYVY:
1193         case V4L2_PIX_FMT_YUYV:
1194         case V4L2_PIX_FMT_SBGGR8:
1195                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1196                 frms->discrete.width = stk_sizes[frms->index].w;
1197                 frms->discrete.height = stk_sizes[frms->index].h;
1198                 return 0;
1199         default: return -EINVAL;
1200         }
1201 }
1202
1203 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1204         .s_ctrl = stk_s_ctrl,
1205 };
1206
1207 static struct v4l2_file_operations v4l_stk_fops = {
1208         .owner = THIS_MODULE,
1209         .open = v4l_stk_open,
1210         .release = v4l_stk_release,
1211         .read = v4l_stk_read,
1212         .poll = v4l_stk_poll,
1213         .mmap = v4l_stk_mmap,
1214         .unlocked_ioctl = video_ioctl2,
1215 };
1216
1217 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1218         .vidioc_querycap = stk_vidioc_querycap,
1219         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1220         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1221         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1222         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1223         .vidioc_enum_input = stk_vidioc_enum_input,
1224         .vidioc_s_input = stk_vidioc_s_input,
1225         .vidioc_g_input = stk_vidioc_g_input,
1226         .vidioc_reqbufs = stk_vidioc_reqbufs,
1227         .vidioc_querybuf = stk_vidioc_querybuf,
1228         .vidioc_qbuf = stk_vidioc_qbuf,
1229         .vidioc_dqbuf = stk_vidioc_dqbuf,
1230         .vidioc_streamon = stk_vidioc_streamon,
1231         .vidioc_streamoff = stk_vidioc_streamoff,
1232         .vidioc_g_parm = stk_vidioc_g_parm,
1233         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1234         .vidioc_log_status = v4l2_ctrl_log_status,
1235         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1236         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1237 };
1238
1239 static void stk_v4l_dev_release(struct video_device *vd)
1240 {
1241         struct stk_camera *dev = vdev_to_camera(vd);
1242
1243         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1244                 STK_ERROR("We are leaking memory\n");
1245         usb_put_intf(dev->interface);
1246         kfree(dev);
1247 }
1248
1249 static struct video_device stk_v4l_data = {
1250         .name = "stkwebcam",
1251         .fops = &v4l_stk_fops,
1252         .ioctl_ops = &v4l_stk_ioctl_ops,
1253         .release = stk_v4l_dev_release,
1254 };
1255
1256
1257 static int stk_register_video_device(struct stk_camera *dev)
1258 {
1259         int err;
1260
1261         dev->vdev = stk_v4l_data;
1262         dev->vdev.lock = &dev->lock;
1263         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1264         video_set_drvdata(&dev->vdev, dev);
1265         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1266         if (err)
1267                 STK_ERROR("v4l registration failed\n");
1268         else
1269                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1270                          video_device_node_name(&dev->vdev));
1271         return err;
1272 }
1273
1274
1275 /* USB Stuff */
1276
1277 static int stk_camera_probe(struct usb_interface *interface,
1278                 const struct usb_device_id *id)
1279 {
1280         struct v4l2_ctrl_handler *hdl;
1281         int err = 0;
1282         int i;
1283
1284         struct stk_camera *dev = NULL;
1285         struct usb_device *udev = interface_to_usbdev(interface);
1286         struct usb_host_interface *iface_desc;
1287         struct usb_endpoint_descriptor *endpoint;
1288
1289         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1290         if (dev == NULL) {
1291                 STK_ERROR("Out of memory !\n");
1292                 return -ENOMEM;
1293         }
1294         err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1295         if (err < 0) {
1296                 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1297                 kfree(dev);
1298                 return err;
1299         }
1300         hdl = &dev->hdl;
1301         v4l2_ctrl_handler_init(hdl, 3);
1302         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1303                           V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1304         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1305                           V4L2_CID_HFLIP, 0, 1, 1, 1);
1306         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1307                           V4L2_CID_VFLIP, 0, 1, 1, 1);
1308         if (hdl->error) {
1309                 err = hdl->error;
1310                 dev_err(&udev->dev, "couldn't register control\n");
1311                 goto error;
1312         }
1313         dev->v4l2_dev.ctrl_handler = hdl;
1314
1315         spin_lock_init(&dev->spinlock);
1316         mutex_init(&dev->lock);
1317         init_waitqueue_head(&dev->wait_frame);
1318         dev->first_init = 1; /* webcam LED management */
1319
1320         dev->udev = udev;
1321         dev->interface = interface;
1322         usb_get_intf(interface);
1323
1324         if (hflip != -1)
1325                 dev->vsettings.hflip = hflip;
1326         else if (dmi_check_system(stk_upside_down_dmi_table))
1327                 dev->vsettings.hflip = 1;
1328         else
1329                 dev->vsettings.hflip = 0;
1330         if (vflip != -1)
1331                 dev->vsettings.vflip = vflip;
1332         else if (dmi_check_system(stk_upside_down_dmi_table))
1333                 dev->vsettings.vflip = 1;
1334         else
1335                 dev->vsettings.vflip = 0;
1336         dev->n_sbufs = 0;
1337         set_present(dev);
1338
1339         /* Set up the endpoint information
1340          * use only the first isoc-in endpoint
1341          * for the current alternate setting */
1342         iface_desc = interface->cur_altsetting;
1343
1344         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1345                 endpoint = &iface_desc->endpoint[i].desc;
1346
1347                 if (!dev->isoc_ep
1348                         && usb_endpoint_is_isoc_in(endpoint)) {
1349                         /* we found an isoc in endpoint */
1350                         dev->isoc_ep = usb_endpoint_num(endpoint);
1351                         break;
1352                 }
1353         }
1354         if (!dev->isoc_ep) {
1355                 STK_ERROR("Could not find isoc-in endpoint");
1356                 err = -ENODEV;
1357                 goto error;
1358         }
1359         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1360         dev->vsettings.mode = MODE_VGA;
1361         dev->frame_size = 640 * 480 * 2;
1362
1363         INIT_LIST_HEAD(&dev->sio_avail);
1364         INIT_LIST_HEAD(&dev->sio_full);
1365
1366         usb_set_intfdata(interface, dev);
1367
1368         err = stk_register_video_device(dev);
1369         if (err)
1370                 goto error;
1371
1372         return 0;
1373
1374 error:
1375         v4l2_ctrl_handler_free(hdl);
1376         v4l2_device_unregister(&dev->v4l2_dev);
1377         kfree(dev);
1378         return err;
1379 }
1380
1381 static void stk_camera_disconnect(struct usb_interface *interface)
1382 {
1383         struct stk_camera *dev = usb_get_intfdata(interface);
1384
1385         usb_set_intfdata(interface, NULL);
1386         unset_present(dev);
1387
1388         wake_up_interruptible(&dev->wait_frame);
1389
1390         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1391                  video_device_node_name(&dev->vdev));
1392
1393         video_unregister_device(&dev->vdev);
1394         v4l2_ctrl_handler_free(&dev->hdl);
1395         v4l2_device_unregister(&dev->v4l2_dev);
1396 }
1397
1398 #ifdef CONFIG_PM
1399 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1400 {
1401         struct stk_camera *dev = usb_get_intfdata(intf);
1402         if (is_streaming(dev)) {
1403                 stk_stop_stream(dev);
1404                 /* yes, this is ugly */
1405                 set_streaming(dev);
1406         }
1407         return 0;
1408 }
1409
1410 static int stk_camera_resume(struct usb_interface *intf)
1411 {
1412         struct stk_camera *dev = usb_get_intfdata(intf);
1413         if (!is_initialised(dev))
1414                 return 0;
1415         unset_initialised(dev);
1416         stk_initialise(dev);
1417         stk_camera_write_reg(dev, 0x0, 0x49);
1418         stk_setup_format(dev);
1419         if (is_streaming(dev))
1420                 stk_start_stream(dev);
1421         return 0;
1422 }
1423 #endif
1424
1425 static struct usb_driver stk_camera_driver = {
1426         .name = "stkwebcam",
1427         .probe = stk_camera_probe,
1428         .disconnect = stk_camera_disconnect,
1429         .id_table = stkwebcam_table,
1430 #ifdef CONFIG_PM
1431         .suspend = stk_camera_suspend,
1432         .resume = stk_camera_resume,
1433 #endif
1434 };
1435
1436 module_usb_driver(stk_camera_driver);