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                 .ident = "T12Rg-H",
 116                 .matches = {
 117                         DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"),
 118                         DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H")
 119                 }
 120         },
 121         {}
 122 };
 123
 124
 125 /*
 126  * Basic stuff
 127  */
 128 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
 129 {
 130         struct usb_device *udev = dev->udev;
 131         int ret;
 132
 133         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 134                         0x01,
 135                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 136                         value,
 137                         index,
 138                         NULL,
 139                         0,
 140                         500);
 141         if (ret < 0)
 142                 return ret;
 143         else
 144                 return 0;
 145 }
 146
 147 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
 148 {
 149         struct usb_device *udev = dev->udev;
 150         int ret;
 151
 152         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 153                         0x00,
 154                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 155                         0x00,
 156                         index,
 157                         (u8 *) value,
 158                         sizeof(u8),
 159                         500);
 160         if (ret < 0)
 161                 return ret;
 162         else
 163                 return 0;
 164 }
 165
 166 static int stk_start_stream(struct stk_camera *dev)
 167 {
 168         int value;
 169         int i, ret;
 170         int value_116, value_117;
 171
 172         if (!is_present(dev))
 173                 return -ENODEV;
 174         if (!is_memallocd(dev) || !is_initialised(dev)) {
 175                 STK_ERROR("FIXME: Buffers are not allocated\n");
 176                 return -EFAULT;
 177         }
 178         ret = usb_set_interface(dev->udev, 0, 5);
 179
 180         if (ret < 0)
 181                 STK_ERROR("usb_set_interface failed !\n");
 182         if (stk_sensor_wakeup(dev))
 183                 STK_ERROR("error awaking the sensor\n");
 184
 185         stk_camera_read_reg(dev, 0x0116, &value_116);
 186         stk_camera_read_reg(dev, 0x0117, &value_117);
 187
 188         stk_camera_write_reg(dev, 0x0116, 0x0000);
 189         stk_camera_write_reg(dev, 0x0117, 0x0000);
 190
 191         stk_camera_read_reg(dev, 0x0100, &value);
 192         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 193
 194         stk_camera_write_reg(dev, 0x0116, value_116);
 195         stk_camera_write_reg(dev, 0x0117, value_117);
 196         for (i = 0; i < MAX_ISO_BUFS; i++) {
 197                 if (dev->isobufs[i].urb) {
 198                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 199                         atomic_inc(&dev->urbs_used);
 200                         if (ret)
 201                                 return ret;
 202                 }
 203         }
 204         set_streaming(dev);
 205         return 0;
 206 }
 207
 208 static int stk_stop_stream(struct stk_camera *dev)
 209 {
 210         int value;
 211         int i;
 212         if (is_present(dev)) {
 213                 stk_camera_read_reg(dev, 0x0100, &value);
 214                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 215                 if (dev->isobufs != NULL) {
 216                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 217                                 if (dev->isobufs[i].urb)
 218                                         usb_kill_urb(dev->isobufs[i].urb);
 219                         }
 220                 }
 221                 unset_streaming(dev);
 222
 223                 if (usb_set_interface(dev->udev, 0, 0))
 224                         STK_ERROR("usb_set_interface failed !\n");
 225                 if (stk_sensor_sleep(dev))
 226                         STK_ERROR("error suspending the sensor\n");
 227         }
 228         return 0;
 229 }
 230
 231 /*
 232  * This seems to be the shortest init sequence we
 233  * must do in order to find the sensor
 234  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 235  * is also reset. Maybe powers down it?
 236  * Rest of values don't make a difference
 237  */
 238
 239 static struct regval stk1125_initvals[] = {
 240         /*TODO: What means this sequence? */
 241         {0x0000, 0x24},
 242         {0x0100, 0x21},
 243         {0x0002, 0x68},
 244         {0x0003, 0x80},
 245         {0x0005, 0x00},
 246         {0x0007, 0x03},
 247         {0x000d, 0x00},
 248         {0x000f, 0x02},
 249         {0x0300, 0x12},
 250         {0x0350, 0x41},
 251         {0x0351, 0x00},
 252         {0x0352, 0x00},
 253         {0x0353, 0x00},
 254         {0x0018, 0x10},
 255         {0x0019, 0x00},
 256         {0x001b, 0x0e},
 257         {0x001c, 0x46},
 258         {0x0300, 0x80},
 259         {0x001a, 0x04},
 260         {0x0110, 0x00},
 261         {0x0111, 0x00},
 262         {0x0112, 0x00},
 263         {0x0113, 0x00},
 264
 265         {0xffff, 0xff},
 266 };
 267
 268
 269 static int stk_initialise(struct stk_camera *dev)
 270 {
 271         struct regval *rv;
 272         int ret;
 273         if (!is_present(dev))
 274                 return -ENODEV;
 275         if (is_initialised(dev))
 276                 return 0;
 277         rv = stk1125_initvals;
 278         while (rv->reg != 0xffff) {
 279                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 280                 if (ret)
 281                         return ret;
 282                 rv++;
 283         }
 284         if (stk_sensor_init(dev) == 0) {
 285                 set_initialised(dev);
 286                 return 0;
 287         } else
 288                 return -1;
 289 }
 290
 291 /* *********************************************** */
 292 /*
 293  * This function is called as an URB transfert is complete (Isochronous pipe).
 294  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 295  * and not stall. Neat.
 296  */
 297 static void stk_isoc_handler(struct urb *urb)
 298 {
 299         int i;
 300         int ret;
 301         int framelen;
 302         unsigned long flags;
 303
 304         unsigned char *fill = NULL;
 305         unsigned char *iso_buf = NULL;
 306
 307         struct stk_camera *dev;
 308         struct stk_sio_buffer *fb;
 309
 310         dev = (struct stk_camera *) urb->context;
 311
 312         if (dev == NULL) {
 313                 STK_ERROR("isoc_handler called with NULL device !\n");
 314                 return;
 315         }
 316
 317         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 318                 || urb->status == -ESHUTDOWN) {
 319                 atomic_dec(&dev->urbs_used);
 320                 return;
 321         }
 322
 323         spin_lock_irqsave(&dev->spinlock, flags);
 324
 325         if (urb->status != -EINPROGRESS && urb->status != 0) {
 326                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 327                 goto resubmit;
 328         }
 329
 330         if (list_empty(&dev->sio_avail)) {
 331                 /*FIXME Stop streaming after a while */
 332                 (void) (printk_ratelimit() &&
 333                 STK_ERROR("isoc_handler without available buffer!\n"));
 334                 goto resubmit;
 335         }
 336         fb = list_first_entry(&dev->sio_avail,
 337                         struct stk_sio_buffer, list);
 338         fill = fb->buffer + fb->v4lbuf.bytesused;
 339
 340         for (i = 0; i < urb->number_of_packets; i++) {
 341                 if (urb->iso_frame_desc[i].status != 0) {
 342                         if (urb->iso_frame_desc[i].status != -EXDEV)
 343                                 STK_ERROR("Frame %d has error %d\n", i,
 344                                         urb->iso_frame_desc[i].status);
 345                         continue;
 346                 }
 347                 framelen = urb->iso_frame_desc[i].actual_length;
 348                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 349
 350                 if (framelen <= 4)
 351                         continue; /* no data */
 352
 353                 /*
 354                  * we found something informational from there
 355                  * the isoc frames have to type of headers
 356                  * type1: 00 xx 00 00 or 20 xx 00 00
 357                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 358                  * xx is a sequencer which has never been seen over 0x3f
 359                  * imho data written down looks like bayer, i see similarities
 360                  * after every 640 bytes
 361                  */
 362                 if (*iso_buf & 0x80) {
 363                         framelen -= 8;
 364                         iso_buf += 8;
 365                         /* This marks a new frame */
 366                         if (fb->v4lbuf.bytesused != 0
 367                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 368                                 (void) (printk_ratelimit() &&
 369                                 STK_ERROR("frame %d, "
 370                                         "bytesused=%d, skipping\n",
 371                                         i, fb->v4lbuf.bytesused));
 372                                 fb->v4lbuf.bytesused = 0;
 373                                 fill = fb->buffer;
 374                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 375                                 if (list_is_singular(&dev->sio_avail)) {
 376                                         /* Always reuse the last buffer */
 377                                         fb->v4lbuf.bytesused = 0;
 378                                         fill = fb->buffer;
 379                                 } else {
 380                                         list_move_tail(dev->sio_avail.next,
 381                                                 &dev->sio_full);
 382                                         wake_up(&dev->wait_frame);
 383                                         fb = list_first_entry(&dev->sio_avail,
 384                                                 struct stk_sio_buffer, list);
 385                                         fb->v4lbuf.bytesused = 0;
 386                                         fill = fb->buffer;
 387                                 }
 388                         }
 389                 } else {
 390                         framelen -= 4;
 391                         iso_buf += 4;
 392                 }
 393
 394                 /* Our buffer is full !!! */
 395                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 396                         (void) (printk_ratelimit() &&
 397                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 398                         /*FIXME Do something here? */
 399                         continue;
 400                 }
 401                 spin_unlock_irqrestore(&dev->spinlock, flags);
 402                 memcpy(fill, iso_buf, framelen);
 403                 spin_lock_irqsave(&dev->spinlock, flags);
 404                 fill += framelen;
 405
 406                 /* New size of our buffer */
 407                 fb->v4lbuf.bytesused += framelen;
 408         }
 409
 410 resubmit:
 411         spin_unlock_irqrestore(&dev->spinlock, flags);
 412         urb->dev = dev->udev;
 413         ret = usb_submit_urb(urb, GFP_ATOMIC);
 414         if (ret != 0) {
 415                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 416                         ret);
 417         }
 418 }
 419
 420 /* -------------------------------------------- */
 421
 422 static int stk_prepare_iso(struct stk_camera *dev)
 423 {
 424         void *kbuf;
 425         int i, j;
 426         struct urb *urb;
 427         struct usb_device *udev;
 428
 429         if (dev == NULL)
 430                 return -ENXIO;
 431         udev = dev->udev;
 432
 433         if (dev->isobufs)
 434                 STK_ERROR("isobufs already allocated. Bad\n");
 435         else
 436                 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
 437                                        GFP_KERNEL);
 438         if (dev->isobufs == NULL) {
 439                 STK_ERROR("Unable to allocate iso buffers\n");
 440                 return -ENOMEM;
 441         }
 442         for (i = 0; i < MAX_ISO_BUFS; i++) {
 443                 if (dev->isobufs[i].data == NULL) {
 444                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 445                         if (kbuf == NULL) {
 446                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 447                                         i);
 448                                 goto isobufs_out;
 449                         }
 450                         dev->isobufs[i].data = kbuf;
 451                 } else
 452                         STK_ERROR("isobuf data already allocated\n");
 453                 if (dev->isobufs[i].urb == NULL) {
 454                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 455                         if (urb == NULL) {
 456                                 STK_ERROR("Failed to allocate URB %d\n", i);
 457                                 goto isobufs_out;
 458                         }
 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                 if (dev->sio_bufs[i].buffer != NULL)
 561                         vfree(dev->sio_bufs[i].buffer);
 562         }
 563         kfree(dev->sio_bufs);
 564         dev->sio_bufs = NULL;
 565         return 0;
 566 }
 567
 568 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 569 {
 570         int i;
 571         if (dev->sio_bufs != NULL)
 572                 STK_ERROR("sio_bufs already allocated\n");
 573         else {
 574                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 575                                 GFP_KERNEL);
 576                 if (dev->sio_bufs == NULL)
 577                         return -ENOMEM;
 578                 for (i = 0; i < n_sbufs; i++) {
 579                         if (stk_setup_siobuf(dev, i))
 580                                 return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
 581                         dev->n_sbufs = i+1;
 582                 }
 583         }
 584         return 0;
 585 }
 586
 587 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 588 {
 589         int err;
 590         err = stk_prepare_iso(dev);
 591         if (err) {
 592                 stk_clean_iso(dev);
 593                 return err;
 594         }
 595         err = stk_prepare_sio_buffers(dev, n_sbufs);
 596         if (err) {
 597                 stk_free_sio_buffers(dev);
 598                 return err;
 599         }
 600         return 0;
 601 }
 602
 603 static void stk_free_buffers(struct stk_camera *dev)
 604 {
 605         stk_clean_iso(dev);
 606         stk_free_sio_buffers(dev);
 607 }
 608 /* -------------------------------------------- */
 609
 610 /* v4l file operations */
 611
 612 static int v4l_stk_open(struct file *fp)
 613 {
 614         struct stk_camera *dev = video_drvdata(fp);
 615         int err;
 616
 617         if (dev == NULL || !is_present(dev))
 618                 return -ENXIO;
 619
 620         if (mutex_lock_interruptible(&dev->lock))
 621                 return -ERESTARTSYS;
 622         if (!dev->first_init)
 623                 stk_camera_write_reg(dev, 0x0, 0x24);
 624         else
 625                 dev->first_init = 0;
 626
 627         err = v4l2_fh_open(fp);
 628         if (!err)
 629                 usb_autopm_get_interface(dev->interface);
 630         mutex_unlock(&dev->lock);
 631         return err;
 632 }
 633
 634 static int v4l_stk_release(struct file *fp)
 635 {
 636         struct stk_camera *dev = video_drvdata(fp);
 637
 638         mutex_lock(&dev->lock);
 639         if (dev->owner == fp) {
 640                 stk_stop_stream(dev);
 641                 stk_free_buffers(dev);
 642                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
 643                 unset_initialised(dev);
 644                 dev->owner = NULL;
 645         }
 646
 647         if (is_present(dev))
 648                 usb_autopm_put_interface(dev->interface);
 649         mutex_unlock(&dev->lock);
 650         return v4l2_fh_release(fp);
 651 }
 652
 653 static ssize_t stk_read(struct file *fp, char __user *buf,
 654                 size_t count, loff_t *f_pos)
 655 {
 656         int i;
 657         int ret;
 658         unsigned long flags;
 659         struct stk_sio_buffer *sbuf;
 660         struct stk_camera *dev = video_drvdata(fp);
 661
 662         if (!is_present(dev))
 663                 return -EIO;
 664         if (dev->owner && (!dev->reading || dev->owner != fp))
 665                 return -EBUSY;
 666         dev->owner = fp;
 667         if (!is_streaming(dev)) {
 668                 if (stk_initialise(dev)
 669                         || stk_allocate_buffers(dev, 3)
 670                         || stk_start_stream(dev))
 671                         return -ENOMEM;
 672                 dev->reading = 1;
 673                 spin_lock_irqsave(&dev->spinlock, flags);
 674                 for (i = 0; i < dev->n_sbufs; i++) {
 675                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 676                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 677                 }
 678                 spin_unlock_irqrestore(&dev->spinlock, flags);
 679         }
 680         if (*f_pos == 0) {
 681                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 682                         return -EWOULDBLOCK;
 683                 ret = wait_event_interruptible(dev->wait_frame,
 684                         !list_empty(&dev->sio_full) || !is_present(dev));
 685                 if (ret)
 686                         return ret;
 687                 if (!is_present(dev))
 688                         return -EIO;
 689         }
 690         if (count + *f_pos > dev->frame_size)
 691                 count = dev->frame_size - *f_pos;
 692         spin_lock_irqsave(&dev->spinlock, flags);
 693         if (list_empty(&dev->sio_full)) {
 694                 spin_unlock_irqrestore(&dev->spinlock, flags);
 695                 STK_ERROR("BUG: No siobufs ready\n");
 696                 return 0;
 697         }
 698         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 699         spin_unlock_irqrestore(&dev->spinlock, flags);
 700
 701         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 702                 return -EFAULT;
 703
 704         *f_pos += count;
 705
 706         if (*f_pos >= dev->frame_size) {
 707                 *f_pos = 0;
 708                 spin_lock_irqsave(&dev->spinlock, flags);
 709                 list_move_tail(&sbuf->list, &dev->sio_avail);
 710                 spin_unlock_irqrestore(&dev->spinlock, flags);
 711         }
 712         return count;
 713 }
 714
 715 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 716                 size_t count, loff_t *f_pos)
 717 {
 718         struct stk_camera *dev = video_drvdata(fp);
 719         int ret;
 720
 721         if (mutex_lock_interruptible(&dev->lock))
 722                 return -ERESTARTSYS;
 723         ret = stk_read(fp, buf, count, f_pos);
 724         mutex_unlock(&dev->lock);
 725         return ret;
 726 }
 727
 728 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 729 {
 730         struct stk_camera *dev = video_drvdata(fp);
 731         unsigned res = v4l2_ctrl_poll(fp, wait);
 732
 733         poll_wait(fp, &dev->wait_frame, wait);
 734
 735         if (!is_present(dev))
 736                 return POLLERR;
 737
 738         if (!list_empty(&dev->sio_full))
 739                 return res | POLLIN | POLLRDNORM;
 740
 741         return res;
 742 }
 743
 744
 745 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 746 {
 747         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 748         sbuf->mapcount++;
 749 }
 750 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 751 {
 752         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 753         sbuf->mapcount--;
 754         if (sbuf->mapcount == 0)
 755                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 756 }
 757 static const struct vm_operations_struct stk_v4l_vm_ops = {
 758         .open = stk_v4l_vm_open,
 759         .close = stk_v4l_vm_close
 760 };
 761
 762 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 763 {
 764         unsigned int i;
 765         int ret;
 766         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 767         struct stk_camera *dev = video_drvdata(fp);
 768         struct stk_sio_buffer *sbuf = NULL;
 769
 770         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 771                 return -EINVAL;
 772
 773         for (i = 0; i < dev->n_sbufs; i++) {
 774                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 775                         sbuf = dev->sio_bufs + i;
 776                         break;
 777                 }
 778         }
 779         if (sbuf == NULL)
 780                 return -EINVAL;
 781         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 782         if (ret)
 783                 return ret;
 784         vma->vm_flags |= VM_DONTEXPAND;
 785         vma->vm_private_data = sbuf;
 786         vma->vm_ops = &stk_v4l_vm_ops;
 787         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 788         stk_v4l_vm_open(vma);
 789         return 0;
 790 }
 791
 792 /* v4l ioctl handlers */
 793
 794 static int stk_vidioc_querycap(struct file *filp,
 795                 void *priv, struct v4l2_capability *cap)
 796 {
 797         struct stk_camera *dev = video_drvdata(filp);
 798
 799         strcpy(cap->driver, "stk");
 800         strcpy(cap->card, "stk");
 801         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 802
 803         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
 804                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 805         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 806         return 0;
 807 }
 808
 809 static int stk_vidioc_enum_input(struct file *filp,
 810                 void *priv, struct v4l2_input *input)
 811 {
 812         if (input->index != 0)
 813                 return -EINVAL;
 814
 815         strcpy(input->name, "Syntek USB Camera");
 816         input->type = V4L2_INPUT_TYPE_CAMERA;
 817         return 0;
 818 }
 819
 820
 821 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 822 {
 823         *i = 0;
 824         return 0;
 825 }
 826
 827 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 828 {
 829         return i ? -EINVAL : 0;
 830 }
 831
 832 static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
 833 {
 834         struct stk_camera *dev =
 835                 container_of(ctrl->handler, struct stk_camera, hdl);
 836
 837         switch (ctrl->id) {
 838         case V4L2_CID_BRIGHTNESS:
 839                 return stk_sensor_set_brightness(dev, ctrl->val);
 840         case V4L2_CID_HFLIP:
 841                 if (dmi_check_system(stk_upside_down_dmi_table))
 842                         dev->vsettings.hflip = !ctrl->val;
 843                 else
 844                         dev->vsettings.hflip = ctrl->val;
 845                 return 0;
 846         case V4L2_CID_VFLIP:
 847                 if (dmi_check_system(stk_upside_down_dmi_table))
 848                         dev->vsettings.vflip = !ctrl->val;
 849                 else
 850                         dev->vsettings.vflip = ctrl->val;
 851                 return 0;
 852         default:
 853                 return -EINVAL;
 854         }
 855         return 0;
 856 }
 857
 858
 859 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 860                 void *priv, struct v4l2_fmtdesc *fmtd)
 861 {
 862         switch (fmtd->index) {
 863         case 0:
 864                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 865                 strcpy(fmtd->description, "r5g6b5");
 866                 break;
 867         case 1:
 868                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 869                 strcpy(fmtd->description, "r5g6b5BE");
 870                 break;
 871         case 2:
 872                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
 873                 strcpy(fmtd->description, "yuv4:2:2");
 874                 break;
 875         case 3:
 876                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
 877                 strcpy(fmtd->description, "Raw bayer");
 878                 break;
 879         case 4:
 880                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
 881                 strcpy(fmtd->description, "yuv4:2:2");
 882                 break;
 883         default:
 884                 return -EINVAL;
 885         }
 886         return 0;
 887 }
 888
 889 static struct stk_size {
 890         unsigned w;
 891         unsigned h;
 892         enum stk_mode m;
 893 } stk_sizes[] = {
 894         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
 895         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
 896         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
 897         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
 898         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
 899 };
 900
 901 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
 902                 void *priv, struct v4l2_format *f)
 903 {
 904         struct v4l2_pix_format *pix_format = &f->fmt.pix;
 905         struct stk_camera *dev = video_drvdata(filp);
 906         int i;
 907
 908         for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
 909                         stk_sizes[i].m != dev->vsettings.mode; i++)
 910                 ;
 911         if (i == ARRAY_SIZE(stk_sizes)) {
 912                 STK_ERROR("ERROR: mode invalid\n");
 913                 return -EINVAL;
 914         }
 915         pix_format->width = stk_sizes[i].w;
 916         pix_format->height = stk_sizes[i].h;
 917         pix_format->field = V4L2_FIELD_NONE;
 918         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
 919         pix_format->pixelformat = dev->vsettings.palette;
 920         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 921                 pix_format->bytesperline = pix_format->width;
 922         else
 923                 pix_format->bytesperline = 2 * pix_format->width;
 924         pix_format->sizeimage = pix_format->bytesperline
 925                                 * pix_format->height;
 926         pix_format->priv = 0;
 927         return 0;
 928 }
 929
 930 static int stk_try_fmt_vid_cap(struct file *filp,
 931                 struct v4l2_format *fmtd, int *idx)
 932 {
 933         int i;
 934         switch (fmtd->fmt.pix.pixelformat) {
 935         case V4L2_PIX_FMT_RGB565:
 936         case V4L2_PIX_FMT_RGB565X:
 937         case V4L2_PIX_FMT_UYVY:
 938         case V4L2_PIX_FMT_YUYV:
 939         case V4L2_PIX_FMT_SBGGR8:
 940                 break;
 941         default:
 942                 return -EINVAL;
 943         }
 944         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
 945                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
 946                         break;
 947         }
 948         if (i == ARRAY_SIZE(stk_sizes)
 949                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
 950                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
 951                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
 952                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
 953                 if (idx)
 954                         *idx = i - 1;
 955         } else {
 956                 fmtd->fmt.pix.height = stk_sizes[i].h;
 957                 fmtd->fmt.pix.width = stk_sizes[i].w;
 958                 if (idx)
 959                         *idx = i;
 960         }
 961
 962         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
 963         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 964         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
 965                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
 966         else
 967                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
 968         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
 969                 * fmtd->fmt.pix.height;
 970         fmtd->fmt.pix.priv = 0;
 971         return 0;
 972 }
 973
 974 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
 975                 void *priv, struct v4l2_format *fmtd)
 976 {
 977         return stk_try_fmt_vid_cap(filp, fmtd, NULL);
 978 }
 979
 980 static int stk_setup_format(struct stk_camera *dev)
 981 {
 982         int i = 0;
 983         int depth;
 984         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
 985                 depth = 1;
 986         else
 987                 depth = 2;
 988         while (i < ARRAY_SIZE(stk_sizes) &&
 989                         stk_sizes[i].m != dev->vsettings.mode)
 990                 i++;
 991         if (i == ARRAY_SIZE(stk_sizes)) {
 992                 STK_ERROR("Something is broken in %s\n", __func__);
 993                 return -EFAULT;
 994         }
 995         /* This registers controls some timings, not sure of what. */
 996         stk_camera_write_reg(dev, 0x001b, 0x0e);
 997         if (dev->vsettings.mode == MODE_SXGA)
 998                 stk_camera_write_reg(dev, 0x001c, 0x0e);
 999         else
1000                 stk_camera_write_reg(dev, 0x001c, 0x46);
1001         /*
1002          * Registers 0x0115 0x0114 are the size of each line (bytes),
1003          * regs 0x0117 0x0116 are the heigth of the image.
1004          */
1005         stk_camera_write_reg(dev, 0x0115,
1006                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1007         stk_camera_write_reg(dev, 0x0114,
1008                 (stk_sizes[i].w * depth) & 0xff);
1009         stk_camera_write_reg(dev, 0x0117,
1010                 (stk_sizes[i].h >> 8) & 0xff);
1011         stk_camera_write_reg(dev, 0x0116,
1012                 stk_sizes[i].h & 0xff);
1013         return stk_sensor_configure(dev);
1014 }
1015
1016 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1017                 void *priv, struct v4l2_format *fmtd)
1018 {
1019         int ret;
1020         int idx;
1021         struct stk_camera *dev = video_drvdata(filp);
1022
1023         if (dev == NULL)
1024                 return -ENODEV;
1025         if (!is_present(dev))
1026                 return -ENODEV;
1027         if (is_streaming(dev))
1028                 return -EBUSY;
1029         if (dev->owner)
1030                 return -EBUSY;
1031         ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
1032         if (ret)
1033                 return ret;
1034
1035         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1036         stk_free_buffers(dev);
1037         dev->frame_size = fmtd->fmt.pix.sizeimage;
1038         dev->vsettings.mode = stk_sizes[idx].m;
1039
1040         stk_initialise(dev);
1041         return stk_setup_format(dev);
1042 }
1043
1044 static int stk_vidioc_reqbufs(struct file *filp,
1045                 void *priv, struct v4l2_requestbuffers *rb)
1046 {
1047         struct stk_camera *dev = video_drvdata(filp);
1048
1049         if (dev == NULL)
1050                 return -ENODEV;
1051         if (rb->memory != V4L2_MEMORY_MMAP)
1052                 return -EINVAL;
1053         if (is_streaming(dev)
1054                 || (dev->owner && dev->owner != filp))
1055                 return -EBUSY;
1056         stk_free_buffers(dev);
1057         if (rb->count == 0) {
1058                 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
1059                 unset_initialised(dev);
1060                 dev->owner = NULL;
1061                 return 0;
1062         }
1063         dev->owner = filp;
1064
1065         /*FIXME If they ask for zero, we must stop streaming and free */
1066         if (rb->count < 3)
1067                 rb->count = 3;
1068         /* Arbitrary limit */
1069         else if (rb->count > 5)
1070                 rb->count = 5;
1071
1072         stk_allocate_buffers(dev, rb->count);
1073         rb->count = dev->n_sbufs;
1074         return 0;
1075 }
1076
1077 static int stk_vidioc_querybuf(struct file *filp,
1078                 void *priv, struct v4l2_buffer *buf)
1079 {
1080         struct stk_camera *dev = video_drvdata(filp);
1081         struct stk_sio_buffer *sbuf;
1082
1083         if (buf->index >= dev->n_sbufs)
1084                 return -EINVAL;
1085         sbuf = dev->sio_bufs + buf->index;
1086         *buf = sbuf->v4lbuf;
1087         return 0;
1088 }
1089
1090 static int stk_vidioc_qbuf(struct file *filp,
1091                 void *priv, struct v4l2_buffer *buf)
1092 {
1093         struct stk_camera *dev = video_drvdata(filp);
1094         struct stk_sio_buffer *sbuf;
1095         unsigned long flags;
1096
1097         if (buf->memory != V4L2_MEMORY_MMAP)
1098                 return -EINVAL;
1099
1100         if (buf->index >= dev->n_sbufs)
1101                 return -EINVAL;
1102         sbuf = dev->sio_bufs + buf->index;
1103         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1104                 return 0;
1105         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1106         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1107         spin_lock_irqsave(&dev->spinlock, flags);
1108         list_add_tail(&sbuf->list, &dev->sio_avail);
1109         *buf = sbuf->v4lbuf;
1110         spin_unlock_irqrestore(&dev->spinlock, flags);
1111         return 0;
1112 }
1113
1114 static int stk_vidioc_dqbuf(struct file *filp,
1115                 void *priv, struct v4l2_buffer *buf)
1116 {
1117         struct stk_camera *dev = video_drvdata(filp);
1118         struct stk_sio_buffer *sbuf;
1119         unsigned long flags;
1120         int ret;
1121
1122         if (!is_streaming(dev))
1123                 return -EINVAL;
1124
1125         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1126                 return -EWOULDBLOCK;
1127         ret = wait_event_interruptible(dev->wait_frame,
1128                 !list_empty(&dev->sio_full) || !is_present(dev));
1129         if (ret)
1130                 return ret;
1131         if (!is_present(dev))
1132                 return -EIO;
1133
1134         spin_lock_irqsave(&dev->spinlock, flags);
1135         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1136         list_del_init(&sbuf->list);
1137         spin_unlock_irqrestore(&dev->spinlock, flags);
1138         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1139         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1140         sbuf->v4lbuf.sequence = ++dev->sequence;
1141         v4l2_get_timestamp(&sbuf->v4lbuf.timestamp);
1142
1143         *buf = sbuf->v4lbuf;
1144         return 0;
1145 }
1146
1147 static int stk_vidioc_streamon(struct file *filp,
1148                 void *priv, enum v4l2_buf_type type)
1149 {
1150         struct stk_camera *dev = video_drvdata(filp);
1151         if (is_streaming(dev))
1152                 return 0;
1153         if (dev->sio_bufs == NULL)
1154                 return -EINVAL;
1155         dev->sequence = 0;
1156         return stk_start_stream(dev);
1157 }
1158
1159 static int stk_vidioc_streamoff(struct file *filp,
1160                 void *priv, enum v4l2_buf_type type)
1161 {
1162         struct stk_camera *dev = video_drvdata(filp);
1163         unsigned long flags;
1164         int i;
1165         stk_stop_stream(dev);
1166         spin_lock_irqsave(&dev->spinlock, flags);
1167         INIT_LIST_HEAD(&dev->sio_avail);
1168         INIT_LIST_HEAD(&dev->sio_full);
1169         for (i = 0; i < dev->n_sbufs; i++) {
1170                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1171                 dev->sio_bufs[i].v4lbuf.flags = 0;
1172         }
1173         spin_unlock_irqrestore(&dev->spinlock, flags);
1174         return 0;
1175 }
1176
1177
1178 static int stk_vidioc_g_parm(struct file *filp,
1179                 void *priv, struct v4l2_streamparm *sp)
1180 {
1181         /*FIXME This is not correct */
1182         sp->parm.capture.timeperframe.numerator = 1;
1183         sp->parm.capture.timeperframe.denominator = 30;
1184         sp->parm.capture.readbuffers = 2;
1185         return 0;
1186 }
1187
1188 static int stk_vidioc_enum_framesizes(struct file *filp,
1189                 void *priv, struct v4l2_frmsizeenum *frms)
1190 {
1191         if (frms->index >= ARRAY_SIZE(stk_sizes))
1192                 return -EINVAL;
1193         switch (frms->pixel_format) {
1194         case V4L2_PIX_FMT_RGB565:
1195         case V4L2_PIX_FMT_RGB565X:
1196         case V4L2_PIX_FMT_UYVY:
1197         case V4L2_PIX_FMT_YUYV:
1198         case V4L2_PIX_FMT_SBGGR8:
1199                 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1200                 frms->discrete.width = stk_sizes[frms->index].w;
1201                 frms->discrete.height = stk_sizes[frms->index].h;
1202                 return 0;
1203         default: return -EINVAL;
1204         }
1205 }
1206
1207 static const struct v4l2_ctrl_ops stk_ctrl_ops = {
1208         .s_ctrl = stk_s_ctrl,
1209 };
1210
1211 static struct v4l2_file_operations v4l_stk_fops = {
1212         .owner = THIS_MODULE,
1213         .open = v4l_stk_open,
1214         .release = v4l_stk_release,
1215         .read = v4l_stk_read,
1216         .poll = v4l_stk_poll,
1217         .mmap = v4l_stk_mmap,
1218         .unlocked_ioctl = video_ioctl2,
1219 };
1220
1221 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1222         .vidioc_querycap = stk_vidioc_querycap,
1223         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1224         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1225         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1226         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1227         .vidioc_enum_input = stk_vidioc_enum_input,
1228         .vidioc_s_input = stk_vidioc_s_input,
1229         .vidioc_g_input = stk_vidioc_g_input,
1230         .vidioc_reqbufs = stk_vidioc_reqbufs,
1231         .vidioc_querybuf = stk_vidioc_querybuf,
1232         .vidioc_qbuf = stk_vidioc_qbuf,
1233         .vidioc_dqbuf = stk_vidioc_dqbuf,
1234         .vidioc_streamon = stk_vidioc_streamon,
1235         .vidioc_streamoff = stk_vidioc_streamoff,
1236         .vidioc_g_parm = stk_vidioc_g_parm,
1237         .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1238         .vidioc_log_status = v4l2_ctrl_log_status,
1239         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1240         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1241 };
1242
1243 static void stk_v4l_dev_release(struct video_device *vd)
1244 {
1245         struct stk_camera *dev = vdev_to_camera(vd);
1246
1247         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1248                 STK_ERROR("We are leaking memory\n");
1249         usb_put_intf(dev->interface);
1250         kfree(dev);
1251 }
1252
1253 static struct video_device stk_v4l_data = {
1254         .name = "stkwebcam",
1255         .fops = &v4l_stk_fops,
1256         .ioctl_ops = &v4l_stk_ioctl_ops,
1257         .release = stk_v4l_dev_release,
1258 };
1259
1260
1261 static int stk_register_video_device(struct stk_camera *dev)
1262 {
1263         int err;
1264
1265         dev->vdev = stk_v4l_data;
1266         dev->vdev.lock = &dev->lock;
1267         dev->vdev.debug = debug;
1268         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1269         set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
1270         video_set_drvdata(&dev->vdev, dev);
1271         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1272         if (err)
1273                 STK_ERROR("v4l registration failed\n");
1274         else
1275                 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1276                          video_device_node_name(&dev->vdev));
1277         return err;
1278 }
1279
1280
1281 /* USB Stuff */
1282
1283 static int stk_camera_probe(struct usb_interface *interface,
1284                 const struct usb_device_id *id)
1285 {
1286         struct v4l2_ctrl_handler *hdl;
1287         int err = 0;
1288         int i;
1289
1290         struct stk_camera *dev = NULL;
1291         struct usb_device *udev = interface_to_usbdev(interface);
1292         struct usb_host_interface *iface_desc;
1293         struct usb_endpoint_descriptor *endpoint;
1294
1295         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1296         if (dev == NULL) {
1297                 STK_ERROR("Out of memory !\n");
1298                 return -ENOMEM;
1299         }
1300         err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
1301         if (err < 0) {
1302                 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1303                 kfree(dev);
1304                 return err;
1305         }
1306         hdl = &dev->hdl;
1307         v4l2_ctrl_handler_init(hdl, 3);
1308         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1309                           V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
1310         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1311                           V4L2_CID_HFLIP, 0, 1, 1, 1);
1312         v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
1313                           V4L2_CID_VFLIP, 0, 1, 1, 1);
1314         if (hdl->error) {
1315                 err = hdl->error;
1316                 dev_err(&udev->dev, "couldn't register control\n");
1317                 goto error;
1318         }
1319         dev->v4l2_dev.ctrl_handler = hdl;
1320
1321         spin_lock_init(&dev->spinlock);
1322         mutex_init(&dev->lock);
1323         init_waitqueue_head(&dev->wait_frame);
1324         dev->first_init = 1; /* webcam LED management */
1325
1326         dev->udev = udev;
1327         dev->interface = interface;
1328         usb_get_intf(interface);
1329
1330         if (hflip != -1)
1331                 dev->vsettings.hflip = hflip;
1332         else if (dmi_check_system(stk_upside_down_dmi_table))
1333                 dev->vsettings.hflip = 1;
1334         else
1335                 dev->vsettings.hflip = 0;
1336         if (vflip != -1)
1337                 dev->vsettings.vflip = vflip;
1338         else if (dmi_check_system(stk_upside_down_dmi_table))
1339                 dev->vsettings.vflip = 1;
1340         else
1341                 dev->vsettings.vflip = 0;
1342         dev->n_sbufs = 0;
1343         set_present(dev);
1344
1345         /* Set up the endpoint information
1346          * use only the first isoc-in endpoint
1347          * for the current alternate setting */
1348         iface_desc = interface->cur_altsetting;
1349
1350         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1351                 endpoint = &iface_desc->endpoint[i].desc;
1352
1353                 if (!dev->isoc_ep
1354                         && usb_endpoint_is_isoc_in(endpoint)) {
1355                         /* we found an isoc in endpoint */
1356                         dev->isoc_ep = usb_endpoint_num(endpoint);
1357                         break;
1358                 }
1359         }
1360         if (!dev->isoc_ep) {
1361                 STK_ERROR("Could not find isoc-in endpoint");
1362                 err = -ENODEV;
1363                 goto error;
1364         }
1365         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1366         dev->vsettings.mode = MODE_VGA;
1367         dev->frame_size = 640 * 480 * 2;
1368
1369         INIT_LIST_HEAD(&dev->sio_avail);
1370         INIT_LIST_HEAD(&dev->sio_full);
1371
1372         usb_set_intfdata(interface, dev);
1373
1374         err = stk_register_video_device(dev);
1375         if (err)
1376                 goto error;
1377
1378         return 0;
1379
1380 error:
1381         v4l2_ctrl_handler_free(hdl);
1382         v4l2_device_unregister(&dev->v4l2_dev);
1383         kfree(dev);
1384         return err;
1385 }
1386
1387 static void stk_camera_disconnect(struct usb_interface *interface)
1388 {
1389         struct stk_camera *dev = usb_get_intfdata(interface);
1390
1391         usb_set_intfdata(interface, NULL);
1392         unset_present(dev);
1393
1394         wake_up_interruptible(&dev->wait_frame);
1395
1396         STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1397                  video_device_node_name(&dev->vdev));
1398
1399         video_unregister_device(&dev->vdev);
1400         v4l2_ctrl_handler_free(&dev->hdl);
1401         v4l2_device_unregister(&dev->v4l2_dev);
1402 }
1403
1404 #ifdef CONFIG_PM
1405 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1406 {
1407         struct stk_camera *dev = usb_get_intfdata(intf);
1408         if (is_streaming(dev)) {
1409                 stk_stop_stream(dev);
1410                 /* yes, this is ugly */
1411                 set_streaming(dev);
1412         }
1413         return 0;
1414 }
1415
1416 static int stk_camera_resume(struct usb_interface *intf)
1417 {
1418         struct stk_camera *dev = usb_get_intfdata(intf);
1419         if (!is_initialised(dev))
1420                 return 0;
1421         unset_initialised(dev);
1422         stk_initialise(dev);
1423         stk_camera_write_reg(dev, 0x0, 0x49);
1424         stk_setup_format(dev);
1425         if (is_streaming(dev))
1426                 stk_start_stream(dev);
1427         return 0;
1428 }
1429 #endif
1430
1431 static struct usb_driver stk_camera_driver = {
1432         .name = "stkwebcam",
1433         .probe = stk_camera_probe,
1434         .disconnect = stk_camera_disconnect,
1435         .id_table = stkwebcam_table,
1436 #ifdef CONFIG_PM
1437         .suspend = stk_camera_suspend,
1438         .resume = stk_camera_resume,
1439 #endif
1440 };
1441
1442 module_usb_driver(stk_camera_driver);