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