drivers/media/video/stk-webcam.c

   1 /*
   2  * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
   3  *
   4  * Copyright (C) 2006 Nicolas VIVIEN
   5  * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
   6  *
   7  * Some parts are inspired from cafe_ccic.c
   8  * Copyright 2006-2007 Jonathan Corbet
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/kernel.h>
  28 #include <linux/errno.h>
  29 #include <linux/slab.h>
  30 #include <linux/kref.h>
  31
  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
  39 #include "stk-webcam.h"
  40
  41
  42 static int hflip = 1;
  43 module_param(hflip, bool, 0444);
  44 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
  45
  46 static int vflip = 1;
  47 module_param(vflip, bool, 0444);
  48 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
  49
  50 static int debug;
  51 module_param(debug, int, 0444);
  52 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
  53
  54 MODULE_LICENSE("GPL");
  55 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
  56 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
  57
  58
  59
  60 /* Some cameras have audio interfaces, we aren't interested in those */
  61 static struct usb_device_id stkwebcam_table[] = {
  62         { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
  63         { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
  64         { }
  65 };
  66 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
  67
  68 static void stk_camera_cleanup(struct kref *kref)
  69 {
  70         struct stk_camera *dev = to_stk_camera(kref);
  71
  72         STK_INFO("Syntek USB2.0 Camera release resources"
  73                 " video device /dev/video%d\n", dev->vdev.minor);
  74         video_unregister_device(&dev->vdev);
  75         dev->vdev.priv = NULL;
  76
  77         if (dev->sio_bufs != NULL || dev->isobufs != NULL)
  78                 STK_ERROR("We are leaking memory\n");
  79         usb_put_intf(dev->interface);
  80         kfree(dev);
  81 }
  82
  83
  84 /*
  85  * Basic stuff
  86  */
  87 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
  88 {
  89         struct usb_device *udev = dev->udev;
  90         int ret;
  91
  92         ret =  usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  93                         0x01,
  94                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  95                         value,
  96                         index,
  97                         NULL,
  98                         0,
  99                         500);
 100         if (ret < 0)
 101                 return ret;
 102         else
 103                 return 0;
 104 }
 105
 106 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
 107 {
 108         struct usb_device *udev = dev->udev;
 109         int ret;
 110
 111         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 112                         0x00,
 113                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 114                         0x00,
 115                         index,
 116                         (u8 *) value,
 117                         sizeof(u8),
 118                         500);
 119         if (ret < 0)
 120                 return ret;
 121         else
 122                 return 0;
 123 }
 124
 125 static int stk_start_stream(struct stk_camera *dev)
 126 {
 127         int value;
 128         int i, ret;
 129         int value_116, value_117;
 130
 131         if (!is_present(dev))
 132                 return -ENODEV;
 133         if (!is_memallocd(dev) || !is_initialised(dev)) {
 134                 STK_ERROR("FIXME: Buffers are not allocated\n");
 135                 return -EFAULT;
 136         }
 137         ret = usb_set_interface(dev->udev, 0, 5);
 138
 139         if (ret < 0)
 140                 STK_ERROR("usb_set_interface failed !\n");
 141         if (stk_sensor_wakeup(dev))
 142                 STK_ERROR("error awaking the sensor\n");
 143
 144         stk_camera_read_reg(dev, 0x0116, &value_116);
 145         stk_camera_read_reg(dev, 0x0117, &value_117);
 146
 147         stk_camera_write_reg(dev, 0x0116, 0x0000);
 148         stk_camera_write_reg(dev, 0x0117, 0x0000);
 149
 150         stk_camera_read_reg(dev, 0x0100, &value);
 151         stk_camera_write_reg(dev, 0x0100, value | 0x80);
 152
 153         stk_camera_write_reg(dev, 0x0116, value_116);
 154         stk_camera_write_reg(dev, 0x0117, value_117);
 155         for (i = 0; i < MAX_ISO_BUFS; i++) {
 156                 if (dev->isobufs[i].urb) {
 157                         ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
 158                         atomic_inc(&dev->urbs_used);
 159                         if (ret)
 160                                 return ret;
 161                 }
 162         }
 163         set_streaming(dev);
 164         return 0;
 165 }
 166
 167 static int stk_stop_stream(struct stk_camera *dev)
 168 {
 169         int value;
 170         int i;
 171         if (is_present(dev)) {
 172                 stk_camera_read_reg(dev, 0x0100, &value);
 173                 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
 174                 if (dev->isobufs != NULL) {
 175                         for (i = 0; i < MAX_ISO_BUFS; i++) {
 176                                 if (dev->isobufs[i].urb)
 177                                         usb_kill_urb(dev->isobufs[i].urb);
 178                         }
 179                 }
 180                 unset_streaming(dev);
 181
 182                 if (usb_set_interface(dev->udev, 0, 0))
 183                         STK_ERROR("usb_set_interface failed !\n");
 184                 if (stk_sensor_sleep(dev))
 185                         STK_ERROR("error suspending the sensor\n");
 186         }
 187         return 0;
 188 }
 189
 190 /*
 191  * This seems to be the shortest init sequence we
 192  * must do in order to find the sensor
 193  * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
 194  * is also reset. Maybe powers down it?
 195  * Rest of values don't make a difference
 196  */
 197
 198 static struct regval stk1125_initvals[] = {
 199         /*TODO: What means this sequence? */
 200         {0x0000, 0x24},
 201         {0x0100, 0x21},
 202         {0x0002, 0x68},
 203         {0x0003, 0x80},
 204         {0x0005, 0x00},
 205         {0x0007, 0x03},
 206         {0x000d, 0x00},
 207         {0x000f, 0x02},
 208         {0x0300, 0x12},
 209         {0x0350, 0x41},
 210         {0x0351, 0x00},
 211         {0x0352, 0x00},
 212         {0x0353, 0x00},
 213         {0x0018, 0x10},
 214         {0x0019, 0x00},
 215         {0x001b, 0x0e},
 216         {0x001c, 0x46},
 217         {0x0300, 0x80},
 218         {0x001a, 0x04},
 219         {0x0110, 0x00},
 220         {0x0111, 0x00},
 221         {0x0112, 0x00},
 222         {0x0113, 0x00},
 223
 224         {0xffff, 0xff},
 225 };
 226
 227
 228 static int stk_initialise(struct stk_camera *dev)
 229 {
 230         struct regval *rv;
 231         int ret;
 232         if (!is_present(dev))
 233                 return -ENODEV;
 234         if (is_initialised(dev))
 235                 return 0;
 236         rv = stk1125_initvals;
 237         while (rv->reg != 0xffff) {
 238                 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
 239                 if (ret)
 240                         return ret;
 241                 rv++;
 242         }
 243         if (stk_sensor_init(dev) == 0) {
 244                 set_initialised(dev);
 245                 return 0;
 246         } else
 247                 return -1;
 248 }
 249
 250 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 251
 252 /* sysfs functions */
 253 /*FIXME cleanup this */
 254
 255 static ssize_t show_brightness(struct device *class,
 256                         struct device_attribute *attr, char *buf)
 257 {
 258         struct video_device *vdev = to_video_device(class);
 259         struct stk_camera *dev = vdev_to_camera(vdev);
 260
 261         return sprintf(buf, "%X\n", dev->vsettings.brightness);
 262 }
 263
 264 static ssize_t store_brightness(struct device *class,
 265                 struct device_attribute *attr, const char *buf, size_t count)
 266 {
 267         char *endp;
 268         unsigned long value;
 269         int ret;
 270
 271         struct video_device *vdev = to_video_device(class);
 272         struct stk_camera *dev = vdev_to_camera(vdev);
 273
 274         value = simple_strtoul(buf, &endp, 16);
 275
 276         dev->vsettings.brightness = (int) value;
 277
 278         ret = stk_sensor_set_brightness(dev, value >> 8);
 279         if (ret)
 280                 return ret;
 281         else
 282                 return count;
 283 }
 284
 285 static ssize_t show_hflip(struct device *class,
 286                 struct device_attribute *attr, char *buf)
 287 {
 288         struct video_device *vdev = to_video_device(class);
 289         struct stk_camera *dev = vdev_to_camera(vdev);
 290
 291         return sprintf(buf, "%d\n", dev->vsettings.hflip);
 292 }
 293
 294 static ssize_t store_hflip(struct device *class,
 295                 struct device_attribute *attr, const char *buf, size_t count)
 296 {
 297         struct video_device *vdev = to_video_device(class);
 298         struct stk_camera *dev = vdev_to_camera(vdev);
 299
 300         if (strncmp(buf, "1", 1) == 0)
 301                 dev->vsettings.hflip = 1;
 302         else if (strncmp(buf, "0", 1) == 0)
 303                 dev->vsettings.hflip = 0;
 304         else
 305                 return -EINVAL;
 306
 307         return strlen(buf);
 308 }
 309
 310 static ssize_t show_vflip(struct device *class,
 311                 struct device_attribute *attr, char *buf)
 312 {
 313         struct video_device *vdev = to_video_device(class);
 314         struct stk_camera *dev = vdev_to_camera(vdev);
 315
 316         return sprintf(buf, "%d\n", dev->vsettings.vflip);
 317 }
 318
 319 static ssize_t store_vflip(struct device *class,
 320                 struct device_attribute *attr, const char *buf, size_t count)
 321 {
 322         struct video_device *vdev = to_video_device(class);
 323         struct stk_camera *dev = vdev_to_camera(vdev);
 324
 325         if (strncmp(buf, "1", 1) == 0)
 326                 dev->vsettings.vflip = 1;
 327         else if (strncmp(buf, "0", 1) == 0)
 328                 dev->vsettings.vflip = 0;
 329         else
 330                 return -EINVAL;
 331
 332         return strlen(buf);
 333 }
 334
 335 static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
 336                         show_brightness, store_brightness);
 337 static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
 338 static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
 339
 340 static int stk_create_sysfs_files(struct video_device *vdev)
 341 {
 342         int ret;
 343
 344         ret = video_device_create_file(vdev, &dev_attr_brightness);
 345         ret += video_device_create_file(vdev, &dev_attr_hflip);
 346         ret += video_device_create_file(vdev, &dev_attr_vflip);
 347         return ret;
 348 }
 349
 350 static void stk_remove_sysfs_files(struct video_device *vdev)
 351 {
 352         video_device_remove_file(vdev, &dev_attr_brightness);
 353         video_device_remove_file(vdev, &dev_attr_hflip);
 354         video_device_remove_file(vdev, &dev_attr_vflip);
 355 }
 356
 357 #else
 358 #define stk_create_sysfs_files(a)
 359 #define stk_remove_sysfs_files(a)
 360 #endif
 361
 362 /* *********************************************** */
 363 /*
 364  * This function is called as an URB transfert is complete (Isochronous pipe).
 365  * So, the traitement is done in interrupt time, so it has be fast, not crash,
 366  * and not stall. Neat.
 367  */
 368 static void stk_isoc_handler(struct urb *urb)
 369 {
 370         int i;
 371         int ret;
 372         int framelen;
 373         unsigned long flags;
 374
 375         unsigned char *fill = NULL;
 376         unsigned char *iso_buf = NULL;
 377
 378         struct stk_camera *dev;
 379         struct stk_sio_buffer *fb;
 380
 381         dev = (struct stk_camera *) urb->context;
 382
 383         if (dev == NULL) {
 384                 STK_ERROR("isoc_handler called with NULL device !\n");
 385                 return;
 386         }
 387
 388         if (urb->status == -ENOENT || urb->status == -ECONNRESET
 389                 || urb->status == -ESHUTDOWN) {
 390                 atomic_dec(&dev->urbs_used);
 391                 return;
 392         }
 393
 394         spin_lock_irqsave(&dev->spinlock, flags);
 395
 396         if (urb->status != -EINPROGRESS && urb->status != 0) {
 397                 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
 398                 goto resubmit;
 399         }
 400
 401         if (list_empty(&dev->sio_avail)) {
 402                 /*FIXME Stop streaming after a while */
 403                 (void) (printk_ratelimit() &&
 404                 STK_ERROR("isoc_handler without available buffer!\n"));
 405                 goto resubmit;
 406         }
 407         fb = list_first_entry(&dev->sio_avail,
 408                         struct stk_sio_buffer, list);
 409         fill = fb->buffer + fb->v4lbuf.bytesused;
 410
 411         for (i = 0; i < urb->number_of_packets; i++) {
 412                 if (urb->iso_frame_desc[i].status != 0) {
 413                         if (urb->iso_frame_desc[i].status != -EXDEV)
 414                                 STK_ERROR("Frame %d has error %d\n", i,
 415                                         urb->iso_frame_desc[i].status);
 416                         continue;
 417                 }
 418                 framelen = urb->iso_frame_desc[i].actual_length;
 419                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 420
 421                 if (framelen <= 4)
 422                         continue; /* no data */
 423
 424                 /*
 425                  * we found something informational from there
 426                  * the isoc frames have to type of headers
 427                  * type1: 00 xx 00 00 or 20 xx 00 00
 428                  * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
 429                  * xx is a sequencer which has never been seen over 0x3f
 430                  * imho data written down looks like bayer, i see similarities
 431                  * after every 640 bytes
 432                  */
 433                 if (*iso_buf & 0x80) {
 434                         framelen -= 8;
 435                         iso_buf += 8;
 436                         /* This marks a new frame */
 437                         if (fb->v4lbuf.bytesused != 0
 438                                 && fb->v4lbuf.bytesused != dev->frame_size) {
 439                                 (void) (printk_ratelimit() &&
 440                                 STK_ERROR("frame %d, "
 441                                         "bytesused=%d, skipping\n",
 442                                         i, fb->v4lbuf.bytesused));
 443                                 fb->v4lbuf.bytesused = 0;
 444                                 fill = fb->buffer;
 445                         } else if (fb->v4lbuf.bytesused == dev->frame_size) {
 446                                 list_move_tail(dev->sio_avail.next,
 447                                         &dev->sio_full);
 448                                 wake_up(&dev->wait_frame);
 449                                 if (list_empty(&dev->sio_avail)) {
 450                                         (void) (printk_ratelimit() &&
 451                                         STK_ERROR("No buffer available\n"));
 452                                         goto resubmit;
 453                                 }
 454                                 fb = list_first_entry(&dev->sio_avail,
 455                                         struct stk_sio_buffer, list);
 456                                 fb->v4lbuf.bytesused = 0;
 457                                 fill = fb->buffer;
 458                         }
 459                 } else {
 460                         framelen -= 4;
 461                         iso_buf += 4;
 462                 }
 463
 464                 /* Our buffer is full !!! */
 465                 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
 466                         (void) (printk_ratelimit() &&
 467                         STK_ERROR("Frame buffer overflow, lost sync\n"));
 468                         /*FIXME Do something here? */
 469                         continue;
 470                 }
 471                 spin_unlock_irqrestore(&dev->spinlock, flags);
 472                 memcpy(fill, iso_buf, framelen);
 473                 spin_lock_irqsave(&dev->spinlock, flags);
 474                 fill += framelen;
 475
 476                 /* New size of our buffer */
 477                 fb->v4lbuf.bytesused += framelen;
 478         }
 479
 480 resubmit:
 481         spin_unlock_irqrestore(&dev->spinlock, flags);
 482         urb->dev = dev->udev;
 483         ret = usb_submit_urb(urb, GFP_ATOMIC);
 484         if (ret != 0) {
 485                 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
 486                         ret);
 487         }
 488 }
 489
 490 /* -------------------------------------------- */
 491
 492 static int stk_prepare_iso(struct stk_camera *dev)
 493 {
 494         void *kbuf;
 495         int i, j;
 496         struct urb *urb;
 497         struct usb_device *udev;
 498
 499         if (dev == NULL)
 500                 return -ENXIO;
 501         udev = dev->udev;
 502
 503         if (dev->isobufs)
 504                 STK_ERROR("isobufs already allocated. Bad\n");
 505         else
 506                 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
 507                                         GFP_KERNEL);
 508         if (dev->isobufs == NULL) {
 509                 STK_ERROR("Unable to allocate iso buffers\n");
 510                 return -ENOMEM;
 511         }
 512         for (i = 0; i < MAX_ISO_BUFS; i++) {
 513                 if (dev->isobufs[i].data == NULL) {
 514                         kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
 515                         if (kbuf == NULL) {
 516                                 STK_ERROR("Failed to allocate iso buffer %d\n",
 517                                         i);
 518                                 goto isobufs_out;
 519                         }
 520                         dev->isobufs[i].data = kbuf;
 521                 } else
 522                         STK_ERROR("isobuf data already allocated\n");
 523                 if (dev->isobufs[i].urb == NULL) {
 524                         urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 525                         if (urb == NULL) {
 526                                 STK_ERROR("Failed to allocate URB %d\n", i);
 527                                 goto isobufs_out;
 528                         }
 529                         dev->isobufs[i].urb = urb;
 530                 } else {
 531                         STK_ERROR("Killing URB\n");
 532                         usb_kill_urb(dev->isobufs[i].urb);
 533                         urb = dev->isobufs[i].urb;
 534                 }
 535                 urb->interval = 1;
 536                 urb->dev = udev;
 537                 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
 538                 urb->transfer_flags = URB_ISO_ASAP;
 539                 urb->transfer_buffer = dev->isobufs[i].data;
 540                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 541                 urb->complete = stk_isoc_handler;
 542                 urb->context = dev;
 543                 urb->start_frame = 0;
 544                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 545
 546                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 547                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 548                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 549                 }
 550         }
 551         set_memallocd(dev);
 552         return 0;
 553
 554 isobufs_out:
 555         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
 556                 kfree(dev->isobufs[i].data);
 557         for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
 558                 usb_free_urb(dev->isobufs[i].urb);
 559         kfree(dev->isobufs);
 560         dev->isobufs = NULL;
 561         return -ENOMEM;
 562 }
 563
 564 static void stk_clean_iso(struct stk_camera *dev)
 565 {
 566         int i;
 567
 568         if (dev == NULL || dev->isobufs == NULL)
 569                 return;
 570
 571         for (i = 0; i < MAX_ISO_BUFS; i++) {
 572                 struct urb *urb;
 573
 574                 urb = dev->isobufs[i].urb;
 575                 if (urb) {
 576                         if (atomic_read(&dev->urbs_used))
 577                                 usb_kill_urb(urb);
 578                         usb_free_urb(urb);
 579                 }
 580                 kfree(dev->isobufs[i].data);
 581         }
 582         kfree(dev->isobufs);
 583         dev->isobufs = NULL;
 584         unset_memallocd(dev);
 585 }
 586
 587 static int stk_setup_siobuf(struct stk_camera *dev, int index)
 588 {
 589         struct stk_sio_buffer *buf = dev->sio_bufs + index;
 590         INIT_LIST_HEAD(&buf->list);
 591         buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
 592         buf->buffer = vmalloc_user(buf->v4lbuf.length);
 593         if (buf->buffer == NULL)
 594                 return -ENOMEM;
 595         buf->mapcount = 0;
 596         buf->dev = dev;
 597         buf->v4lbuf.index = index;
 598         buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 599         buf->v4lbuf.field = V4L2_FIELD_NONE;
 600         buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
 601         buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
 602         return 0;
 603 }
 604
 605 static int stk_free_sio_buffers(struct stk_camera *dev)
 606 {
 607         int i;
 608         int nbufs;
 609         unsigned long flags;
 610         if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
 611                 return 0;
 612         /*
 613         * If any buffers are mapped, we cannot free them at all.
 614         */
 615         for (i = 0; i < dev->n_sbufs; i++) {
 616                 if (dev->sio_bufs[i].mapcount > 0)
 617                         return -EBUSY;
 618         }
 619         /*
 620         * OK, let's do it.
 621         */
 622         spin_lock_irqsave(&dev->spinlock, flags);
 623         INIT_LIST_HEAD(&dev->sio_avail);
 624         INIT_LIST_HEAD(&dev->sio_full);
 625         nbufs = dev->n_sbufs;
 626         dev->n_sbufs = 0;
 627         spin_unlock_irqrestore(&dev->spinlock, flags);
 628         for (i = 0; i < nbufs; i++) {
 629                 if (dev->sio_bufs[i].buffer != NULL)
 630                         vfree(dev->sio_bufs[i].buffer);
 631         }
 632         kfree(dev->sio_bufs);
 633         dev->sio_bufs = NULL;
 634         return 0;
 635 }
 636
 637 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
 638 {
 639         int i;
 640         if (dev->sio_bufs != NULL)
 641                 STK_ERROR("sio_bufs already allocated\n");
 642         else {
 643                 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
 644                                 GFP_KERNEL);
 645                 if (dev->sio_bufs == NULL)
 646                         return -ENOMEM;
 647                 for (i = 0; i < n_sbufs; i++) {
 648                         if (stk_setup_siobuf(dev, i))
 649                                 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
 650                         dev->n_sbufs = i+1;
 651                 }
 652         }
 653         return 0;
 654 }
 655
 656 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
 657 {
 658         int err;
 659         err = stk_prepare_iso(dev);
 660         if (err) {
 661                 stk_clean_iso(dev);
 662                 return err;
 663         }
 664         err = stk_prepare_sio_buffers(dev, n_sbufs);
 665         if (err) {
 666                 stk_free_sio_buffers(dev);
 667                 return err;
 668         }
 669         return 0;
 670 }
 671
 672 static void stk_free_buffers(struct stk_camera *dev)
 673 {
 674         stk_clean_iso(dev);
 675         stk_free_sio_buffers(dev);
 676 }
 677 /* -------------------------------------------- */
 678
 679 /* v4l file operations */
 680
 681 static int v4l_stk_open(struct inode *inode, struct file *fp)
 682 {
 683         struct stk_camera *dev;
 684         struct video_device *vdev;
 685
 686         vdev = video_devdata(fp);
 687         dev = vdev_to_camera(vdev);
 688
 689         if (dev == NULL || !is_present(dev))
 690                 return -ENXIO;
 691         fp->private_data = vdev;
 692         kref_get(&dev->kref);
 693         usb_autopm_get_interface(dev->interface);
 694
 695         return 0;
 696 }
 697
 698 static int v4l_stk_release(struct inode *inode, struct file *fp)
 699 {
 700         struct stk_camera *dev;
 701         struct video_device *vdev;
 702
 703         vdev = video_devdata(fp);
 704         if (vdev == NULL) {
 705                 STK_ERROR("v4l_release called w/o video devdata\n");
 706                 return -EFAULT;
 707         }
 708         dev = vdev_to_camera(vdev);
 709         if (dev == NULL) {
 710                 STK_ERROR("v4l_release called on removed device\n");
 711                 return -ENODEV;
 712         }
 713
 714         if (dev->owner != fp) {
 715                 usb_autopm_put_interface(dev->interface);
 716                 kref_put(&dev->kref, stk_camera_cleanup);
 717                 return 0;
 718         }
 719
 720         stk_stop_stream(dev);
 721
 722         stk_free_buffers(dev);
 723
 724         dev->owner = NULL;
 725
 726         usb_autopm_put_interface(dev->interface);
 727         kref_put(&dev->kref, stk_camera_cleanup);
 728
 729         return 0;
 730 }
 731
 732 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
 733                 size_t count, loff_t *f_pos)
 734 {
 735         int i;
 736         int ret;
 737         unsigned long flags;
 738         struct stk_camera *dev;
 739         struct video_device *vdev;
 740         struct stk_sio_buffer *sbuf;
 741
 742         vdev = video_devdata(fp);
 743         if (vdev == NULL)
 744                 return -EFAULT;
 745         dev = vdev_to_camera(vdev);
 746
 747         if (dev == NULL)
 748                 return -EIO;
 749
 750         if (!is_present(dev))
 751                 return -EIO;
 752         if (dev->owner && dev->owner != fp)
 753                 return -EBUSY;
 754         dev->owner = fp;
 755         if (!is_streaming(dev)) {
 756                 if (stk_initialise(dev)
 757                         || stk_allocate_buffers(dev, 3)
 758                         || stk_start_stream(dev))
 759                         return -ENOMEM;
 760                 spin_lock_irqsave(&dev->spinlock, flags);
 761                 for (i = 0; i < dev->n_sbufs; i++) {
 762                         list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
 763                         dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
 764                 }
 765                 spin_unlock_irqrestore(&dev->spinlock, flags);
 766         }
 767         if (*f_pos == 0) {
 768                 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
 769                         return -EWOULDBLOCK;
 770                 ret = wait_event_interruptible(dev->wait_frame,
 771                         !list_empty(&dev->sio_full) || !is_present(dev));
 772                 if (ret)
 773                         return ret;
 774                 if (!is_present(dev))
 775                         return -EIO;
 776         }
 777         if (count + *f_pos > dev->frame_size)
 778                 count = dev->frame_size - *f_pos;
 779         spin_lock_irqsave(&dev->spinlock, flags);
 780         if (list_empty(&dev->sio_full)) {
 781                 spin_unlock_irqrestore(&dev->spinlock, flags);
 782                 STK_ERROR("BUG: No siobufs ready\n");
 783                 return 0;
 784         }
 785         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
 786         spin_unlock_irqrestore(&dev->spinlock, flags);
 787
 788         if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
 789                 return -EFAULT;
 790
 791         *f_pos += count;
 792
 793         if (*f_pos >= dev->frame_size) {
 794                 *f_pos = 0;
 795                 spin_lock_irqsave(&dev->spinlock, flags);
 796                 list_move_tail(&sbuf->list, &dev->sio_avail);
 797                 spin_unlock_irqrestore(&dev->spinlock, flags);
 798         }
 799         return count;
 800 }
 801
 802 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
 803 {
 804         struct stk_camera *dev;
 805         struct video_device *vdev;
 806
 807         vdev = video_devdata(fp);
 808
 809         if (vdev == NULL)
 810                 return -EFAULT;
 811
 812         dev = vdev_to_camera(vdev);
 813         if (dev == NULL)
 814                 return -ENODEV;
 815
 816         poll_wait(fp, &dev->wait_frame, wait);
 817
 818         if (!is_present(dev))
 819                 return POLLERR;
 820
 821         if (!list_empty(&dev->sio_full))
 822                 return (POLLIN | POLLRDNORM);
 823
 824         return 0;
 825 }
 826
 827
 828 static void stk_v4l_vm_open(struct vm_area_struct *vma)
 829 {
 830         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 831         sbuf->mapcount++;
 832 }
 833 static void stk_v4l_vm_close(struct vm_area_struct *vma)
 834 {
 835         struct stk_sio_buffer *sbuf = vma->vm_private_data;
 836         sbuf->mapcount--;
 837         if (sbuf->mapcount == 0)
 838                 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
 839 }
 840 static struct vm_operations_struct stk_v4l_vm_ops = {
 841         .open = stk_v4l_vm_open,
 842         .close = stk_v4l_vm_close
 843 };
 844
 845 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
 846 {
 847         unsigned int i;
 848         int ret;
 849         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 850         struct stk_camera *dev;
 851         struct video_device *vdev;
 852         struct stk_sio_buffer *sbuf = NULL;
 853
 854         if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
 855                 return -EINVAL;
 856
 857         vdev = video_devdata(fp);
 858         dev = vdev_to_camera(vdev);
 859
 860         for (i = 0; i < dev->n_sbufs; i++) {
 861                 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
 862                         sbuf = dev->sio_bufs + i;
 863                         break;
 864                 }
 865         }
 866         if (sbuf == NULL)
 867                 return -EINVAL;
 868         ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
 869         if (ret)
 870                 return ret;
 871         vma->vm_flags |= VM_DONTEXPAND;
 872         vma->vm_private_data = sbuf;
 873         vma->vm_ops = &stk_v4l_vm_ops;
 874         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
 875         stk_v4l_vm_open(vma);
 876         return 0;
 877 }
 878
 879 /* v4l ioctl handlers */
 880
 881 static int stk_vidioc_querycap(struct file *filp,
 882                 void *priv, struct v4l2_capability *cap)
 883 {
 884         strcpy(cap->driver, "stk");
 885         strcpy(cap->card, "stk");
 886         cap->version = DRIVER_VERSION_NUM;
 887
 888         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
 889                 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 890         return 0;
 891 }
 892
 893 static int stk_vidioc_enum_input(struct file *filp,
 894                 void *priv, struct v4l2_input *input)
 895 {
 896         if (input->index != 0)
 897                 return -EINVAL;
 898
 899         strcpy(input->name, "Syntek USB Camera");
 900         input->type = V4L2_INPUT_TYPE_CAMERA;
 901         return 0;
 902 }
 903
 904
 905 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 906 {
 907         *i = 0;
 908         return 0;
 909 }
 910
 911 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 912 {
 913         if (i != 0)
 914                 return -EINVAL;
 915         else
 916                 return 0;
 917 }
 918
 919 /* from vivi.c */
 920 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
 921 {
 922         return 0;
 923 }
 924
 925 /* List of all V4Lv2 controls supported by the driver */
 926 static struct v4l2_queryctrl stk_controls[] = {
 927         {
 928                 .id      = V4L2_CID_BRIGHTNESS,
 929                 .type    = V4L2_CTRL_TYPE_INTEGER,
 930                 .name    = "Brightness",
 931                 .minimum = 0,
 932                 .maximum = 0xffff,
 933                 .step    = 0x0100,
 934                 .default_value = 0x6000,
 935         },
 936         /*TODO: get more controls to work */
 937 };
 938
 939 static int stk_vidioc_queryctrl(struct file *filp,
 940                 void *priv, struct v4l2_queryctrl *c)
 941 {
 942         int i;
 943         int nbr;
 944         nbr = ARRAY_SIZE(stk_controls);
 945
 946         for (i = 0; i < nbr; i++) {
 947                 if (stk_controls[i].id == c->id) {
 948                         memcpy(c, &stk_controls[i],
 949                                 sizeof(struct v4l2_queryctrl));
 950                         return 0;
 951                 }
 952         }
 953         return -EINVAL;
 954 }
 955
 956 static int stk_vidioc_g_ctrl(struct file *filp,
 957                 void *priv, struct v4l2_control *c)
 958 {
 959         struct stk_camera *dev = priv;
 960         switch (c->id) {
 961         case V4L2_CID_BRIGHTNESS:
 962                 c->value = dev->vsettings.brightness;
 963                 break;
 964         default:
 965                 return -EINVAL;
 966         }
 967         return 0;
 968 }
 969
 970 static int stk_vidioc_s_ctrl(struct file *filp,
 971                 void *priv, struct v4l2_control *c)
 972 {
 973         struct stk_camera *dev = priv;
 974         switch (c->id) {
 975         case V4L2_CID_BRIGHTNESS:
 976                 dev->vsettings.brightness = c->value;
 977                 return stk_sensor_set_brightness(dev, c->value >> 8);
 978         default:
 979                 return -EINVAL;
 980         }
 981         return 0;
 982 }
 983
 984
 985 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
 986                 void *priv, struct v4l2_fmtdesc *fmtd)
 987 {
 988         fmtd->flags = 0;
 989
 990         switch (fmtd->index) {
 991         case 0:
 992                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
 993                 strcpy(fmtd->description, "r5g6b5");
 994                 break;
 995         case 1:
 996                 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
 997                 strcpy(fmtd->description, "r5g6b5BE");
 998                 break;
 999         case 2:
1000                 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
1001                 strcpy(fmtd->description, "yuv4:2:2");
1002                 break;
1003         case 3:
1004                 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
1005                 strcpy(fmtd->description, "Raw bayer");
1006                 break;
1007         case 4:
1008                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1009                 strcpy(fmtd->description, "yuv4:2:2");
1010                 break;
1011         default:
1012                 return -EINVAL;
1013         }
1014         return 0;
1015 }
1016
1017 static struct stk_size {
1018         unsigned w;
1019         unsigned h;
1020         enum stk_mode m;
1021 } stk_sizes[] = {
1022         { .w = 1280, .h = 1024, .m = MODE_SXGA, },
1023         { .w = 640,  .h = 480,  .m = MODE_VGA,  },
1024         { .w = 352,  .h = 288,  .m = MODE_CIF,  },
1025         { .w = 320,  .h = 240,  .m = MODE_QVGA, },
1026         { .w = 176,  .h = 144,  .m = MODE_QCIF, },
1027 };
1028
1029 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
1030                 void *priv, struct v4l2_format *f)
1031 {
1032         struct v4l2_pix_format *pix_format = &f->fmt.pix;
1033         struct stk_camera *dev = priv;
1034         int i;
1035
1036         for (i = 0; i < ARRAY_SIZE(stk_sizes)
1037                         && stk_sizes[i].m != dev->vsettings.mode;
1038                 i++);
1039         if (i == ARRAY_SIZE(stk_sizes)) {
1040                 STK_ERROR("ERROR: mode invalid\n");
1041                 return -EINVAL;
1042         }
1043         pix_format->width = stk_sizes[i].w;
1044         pix_format->height = stk_sizes[i].h;
1045         pix_format->field = V4L2_FIELD_NONE;
1046         pix_format->colorspace = V4L2_COLORSPACE_SRGB;
1047         pix_format->priv = 0;
1048         pix_format->pixelformat = dev->vsettings.palette;
1049         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1050                 pix_format->bytesperline = pix_format->width;
1051         else
1052                 pix_format->bytesperline = 2 * pix_format->width;
1053         pix_format->sizeimage = pix_format->bytesperline
1054                                 * pix_format->height;
1055         return 0;
1056 }
1057
1058 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
1059                 void *priv, struct v4l2_format *fmtd)
1060 {
1061         int i;
1062         switch (fmtd->fmt.pix.pixelformat) {
1063         case V4L2_PIX_FMT_RGB565:
1064         case V4L2_PIX_FMT_RGB565X:
1065         case V4L2_PIX_FMT_UYVY:
1066         case V4L2_PIX_FMT_YUYV:
1067         case V4L2_PIX_FMT_SBGGR8:
1068                 break;
1069         default:
1070                 return -EINVAL;
1071         }
1072         for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
1073                 if (fmtd->fmt.pix.width > stk_sizes[i].w)
1074                         break;
1075         }
1076         if (i == ARRAY_SIZE(stk_sizes)
1077                 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
1078                         < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
1079                 fmtd->fmt.pix.height = stk_sizes[i-1].h;
1080                 fmtd->fmt.pix.width = stk_sizes[i-1].w;
1081                 fmtd->fmt.pix.priv = i - 1;
1082         } else {
1083                 fmtd->fmt.pix.height = stk_sizes[i].h;
1084                 fmtd->fmt.pix.width = stk_sizes[i].w;
1085                 fmtd->fmt.pix.priv = i;
1086         }
1087
1088         fmtd->fmt.pix.field = V4L2_FIELD_NONE;
1089         fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1090         if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
1091                 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
1092         else
1093                 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
1094         fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
1095                 * fmtd->fmt.pix.height;
1096         return 0;
1097 }
1098
1099 static int stk_setup_format(struct stk_camera *dev)
1100 {
1101         int i = 0;
1102         int depth;
1103         if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
1104                 depth = 1;
1105         else
1106                 depth = 2;
1107         while (stk_sizes[i].m != dev->vsettings.mode
1108                         && i < ARRAY_SIZE(stk_sizes))
1109                 i++;
1110         if (i == ARRAY_SIZE(stk_sizes)) {
1111                 STK_ERROR("Something is broken in %s\n", __func__);
1112                 return -EFAULT;
1113         }
1114         /* This registers controls some timings, not sure of what. */
1115         stk_camera_write_reg(dev, 0x001b, 0x0e);
1116         if (dev->vsettings.mode == MODE_SXGA)
1117                 stk_camera_write_reg(dev, 0x001c, 0x0e);
1118         else
1119                 stk_camera_write_reg(dev, 0x001c, 0x46);
1120         /*
1121          * Registers 0x0115 0x0114 are the size of each line (bytes),
1122          * regs 0x0117 0x0116 are the heigth of the image.
1123          */
1124         stk_camera_write_reg(dev, 0x0115,
1125                 ((stk_sizes[i].w * depth) >> 8) & 0xff);
1126         stk_camera_write_reg(dev, 0x0114,
1127                 (stk_sizes[i].w * depth) & 0xff);
1128         stk_camera_write_reg(dev, 0x0117,
1129                 (stk_sizes[i].h >> 8) & 0xff);
1130         stk_camera_write_reg(dev, 0x0116,
1131                 stk_sizes[i].h & 0xff);
1132         return stk_sensor_configure(dev);
1133 }
1134
1135 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
1136                 void *priv, struct v4l2_format *fmtd)
1137 {
1138         int ret;
1139         struct stk_camera *dev = priv;
1140
1141         if (dev == NULL)
1142                 return -ENODEV;
1143         if (!is_present(dev))
1144                 return -ENODEV;
1145         if (is_streaming(dev))
1146                 return -EBUSY;
1147         if (dev->owner && dev->owner != filp)
1148                 return -EBUSY;
1149         ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1150         if (ret)
1151                 return ret;
1152         dev->owner = filp;
1153
1154         dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1155         stk_free_buffers(dev);
1156         dev->frame_size = fmtd->fmt.pix.sizeimage;
1157         dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1158
1159         stk_initialise(dev);
1160         return stk_setup_format(dev);
1161 }
1162
1163 static int stk_vidioc_reqbufs(struct file *filp,
1164                 void *priv, struct v4l2_requestbuffers *rb)
1165 {
1166         struct stk_camera *dev = priv;
1167
1168         if (dev == NULL)
1169                 return -ENODEV;
1170         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1171                 return -EINVAL;
1172         if (rb->memory != V4L2_MEMORY_MMAP)
1173                 return -EINVAL;
1174         if (is_streaming(dev)
1175                 || (dev->owner && dev->owner != filp))
1176                 return -EBUSY;
1177         dev->owner = filp;
1178
1179         /*FIXME If they ask for zero, we must stop streaming and free */
1180         if (rb->count < 3)
1181                 rb->count = 3;
1182         /* Arbitrary limit */
1183         else if (rb->count > 5)
1184                 rb->count = 5;
1185
1186         stk_allocate_buffers(dev, rb->count);
1187         rb->count = dev->n_sbufs;
1188         return 0;
1189 }
1190
1191 static int stk_vidioc_querybuf(struct file *filp,
1192                 void *priv, struct v4l2_buffer *buf)
1193 {
1194         int index;
1195         struct stk_camera *dev = priv;
1196         struct stk_sio_buffer *sbuf;
1197
1198         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1199                 return -EINVAL;
1200
1201         index = buf->index;
1202
1203         if (index < 0 || index >= dev->n_sbufs)
1204                 return -EINVAL;
1205         sbuf = dev->sio_bufs + buf->index;
1206         *buf = sbuf->v4lbuf;
1207         return 0;
1208 }
1209
1210 static int stk_vidioc_qbuf(struct file *filp,
1211                 void *priv, struct v4l2_buffer *buf)
1212 {
1213         struct stk_camera *dev = priv;
1214         struct stk_sio_buffer *sbuf;
1215         unsigned long flags;
1216         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1217                 return -EINVAL;
1218
1219         if (buf->memory != V4L2_MEMORY_MMAP)
1220                 return -EINVAL;
1221
1222         if (buf->index < 0 || buf->index >= dev->n_sbufs)
1223                 return -EINVAL;
1224         sbuf = dev->sio_bufs + buf->index;
1225         if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1226                 return 0;
1227         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1228         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1229         spin_lock_irqsave(&dev->spinlock, flags);
1230         list_add_tail(&sbuf->list, &dev->sio_avail);
1231         *buf = sbuf->v4lbuf;
1232         spin_unlock_irqrestore(&dev->spinlock, flags);
1233         return 0;
1234 }
1235
1236 static int stk_vidioc_dqbuf(struct file *filp,
1237                 void *priv, struct v4l2_buffer *buf)
1238 {
1239         struct stk_camera *dev = priv;
1240         struct stk_sio_buffer *sbuf;
1241         unsigned long flags;
1242         int ret;
1243
1244         if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1245                 || !is_streaming(dev))
1246                 return -EINVAL;
1247
1248         if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1249                 return -EWOULDBLOCK;
1250         ret = wait_event_interruptible(dev->wait_frame,
1251                 !list_empty(&dev->sio_full) || !is_present(dev));
1252         if (ret)
1253                 return ret;
1254         if (!is_present(dev))
1255                 return -EIO;
1256
1257         spin_lock_irqsave(&dev->spinlock, flags);
1258         sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1259         list_del_init(&sbuf->list);
1260         spin_unlock_irqrestore(&dev->spinlock, flags);
1261         sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1262         sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1263         sbuf->v4lbuf.sequence = ++dev->sequence;
1264         do_gettimeofday(&sbuf->v4lbuf.timestamp);
1265
1266         *buf = sbuf->v4lbuf;
1267         return 0;
1268 }
1269
1270 static int stk_vidioc_streamon(struct file *filp,
1271                 void *priv, enum v4l2_buf_type type)
1272 {
1273         struct stk_camera *dev = priv;
1274         if (is_streaming(dev))
1275                 return 0;
1276         if (dev->sio_bufs == NULL)
1277                 return -EINVAL;
1278         dev->sequence = 0;
1279         return stk_start_stream(dev);
1280 }
1281
1282 static int stk_vidioc_streamoff(struct file *filp,
1283                 void *priv, enum v4l2_buf_type type)
1284 {
1285         struct stk_camera *dev = priv;
1286         unsigned long flags;
1287         int i;
1288         stk_stop_stream(dev);
1289         spin_lock_irqsave(&dev->spinlock, flags);
1290         INIT_LIST_HEAD(&dev->sio_avail);
1291         INIT_LIST_HEAD(&dev->sio_full);
1292         for (i = 0; i < dev->n_sbufs; i++) {
1293                 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1294                 dev->sio_bufs[i].v4lbuf.flags = 0;
1295         }
1296         spin_unlock_irqrestore(&dev->spinlock, flags);
1297         return 0;
1298 }
1299
1300
1301 static int stk_vidioc_g_parm(struct file *filp,
1302                 void *priv, struct v4l2_streamparm *sp)
1303 {
1304         if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1305                 return -EINVAL;
1306
1307         sp->parm.capture.capability = 0;
1308         sp->parm.capture.capturemode = 0;
1309         /*FIXME This is not correct */
1310         sp->parm.capture.timeperframe.numerator = 1;
1311         sp->parm.capture.timeperframe.denominator = 30;
1312         sp->parm.capture.readbuffers = 2;
1313         sp->parm.capture.extendedmode = 0;
1314         return 0;
1315 }
1316
1317 static struct file_operations v4l_stk_fops = {
1318         .owner = THIS_MODULE,
1319         .open = v4l_stk_open,
1320         .release = v4l_stk_release,
1321         .read = v4l_stk_read,
1322         .poll = v4l_stk_poll,
1323         .mmap = v4l_stk_mmap,
1324         .ioctl = video_ioctl2,
1325 #ifdef CONFIG_COMPAT
1326         .compat_ioctl = v4l_compat_ioctl32,
1327 #endif
1328         .llseek = no_llseek
1329 };
1330
1331 static void stk_v4l_dev_release(struct video_device *vd)
1332 {
1333 }
1334
1335 static struct video_device stk_v4l_data = {
1336         .name = "stkwebcam",
1337         .type = VFL_TYPE_GRABBER,
1338         .type2 = VID_TYPE_CAPTURE,
1339         .minor = -1,
1340         .tvnorms = V4L2_STD_UNKNOWN,
1341         .current_norm = V4L2_STD_UNKNOWN,
1342         .fops = &v4l_stk_fops,
1343         .release = stk_v4l_dev_release,
1344
1345         .vidioc_querycap = stk_vidioc_querycap,
1346         .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1347         .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1348         .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1349         .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1350         .vidioc_enum_input = stk_vidioc_enum_input,
1351         .vidioc_s_input = stk_vidioc_s_input,
1352         .vidioc_g_input = stk_vidioc_g_input,
1353         .vidioc_s_std = stk_vidioc_s_std,
1354         .vidioc_reqbufs = stk_vidioc_reqbufs,
1355         .vidioc_querybuf = stk_vidioc_querybuf,
1356         .vidioc_qbuf = stk_vidioc_qbuf,
1357         .vidioc_dqbuf = stk_vidioc_dqbuf,
1358         .vidioc_streamon = stk_vidioc_streamon,
1359         .vidioc_streamoff = stk_vidioc_streamoff,
1360         .vidioc_queryctrl = stk_vidioc_queryctrl,
1361         .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1362         .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1363         .vidioc_g_parm = stk_vidioc_g_parm,
1364 };
1365
1366
1367 static int stk_register_video_device(struct stk_camera *dev)
1368 {
1369         int err;
1370
1371         dev->vdev = stk_v4l_data;
1372         dev->vdev.debug = debug;
1373         dev->vdev.parent = &dev->interface->dev;
1374         dev->vdev.priv = dev;
1375         err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1376         if (err)
1377                 STK_ERROR("v4l registration failed\n");
1378         else
1379                 STK_INFO("Syntek USB2.0 Camera is now controlling video device"
1380                         " /dev/video%d\n", dev->vdev.minor);
1381         return err;
1382 }
1383
1384
1385 /* USB Stuff */
1386
1387 static int stk_camera_probe(struct usb_interface *interface,
1388                 const struct usb_device_id *id)
1389 {
1390         int i;
1391         int err;
1392
1393         struct stk_camera *dev = NULL;
1394         struct usb_device *udev = interface_to_usbdev(interface);
1395         struct usb_host_interface *iface_desc;
1396         struct usb_endpoint_descriptor *endpoint;
1397
1398         dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1399         if (dev == NULL) {
1400                 STK_ERROR("Out of memory !\n");
1401                 return -ENOMEM;
1402         }
1403
1404         kref_init(&dev->kref);
1405         spin_lock_init(&dev->spinlock);
1406         init_waitqueue_head(&dev->wait_frame);
1407
1408         dev->udev = udev;
1409         dev->interface = interface;
1410         usb_get_intf(interface);
1411
1412         dev->vsettings.vflip = vflip;
1413         dev->vsettings.hflip = hflip;
1414         dev->n_sbufs = 0;
1415         set_present(dev);
1416
1417         /* Set up the endpoint information
1418          * use only the first isoc-in endpoint
1419          * for the current alternate setting */
1420         iface_desc = interface->cur_altsetting;
1421
1422         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1423                 endpoint = &iface_desc->endpoint[i].desc;
1424
1425                 if (!dev->isoc_ep
1426                         && ((endpoint->bEndpointAddress
1427                                 & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
1428                         && ((endpoint->bmAttributes
1429                                 & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
1430                         /* we found an isoc in endpoint */
1431                         dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
1432                         break;
1433                 }
1434         }
1435         if (!dev->isoc_ep) {
1436                 STK_ERROR("Could not find isoc-in endpoint");
1437                 kref_put(&dev->kref, stk_camera_cleanup);
1438                 return -ENODEV;
1439         }
1440         dev->vsettings.brightness = 0x7fff;
1441         dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1442         dev->vsettings.mode = MODE_VGA;
1443         dev->frame_size = 640 * 480 * 2;
1444
1445         INIT_LIST_HEAD(&dev->sio_avail);
1446         INIT_LIST_HEAD(&dev->sio_full);
1447
1448         usb_set_intfdata(interface, dev);
1449
1450         err = stk_register_video_device(dev);
1451         if (err) {
1452                 kref_put(&dev->kref, stk_camera_cleanup);
1453                 return err;
1454         }
1455
1456         stk_create_sysfs_files(&dev->vdev);
1457         usb_autopm_enable(dev->interface);
1458
1459         return 0;
1460 }
1461
1462 static void stk_camera_disconnect(struct usb_interface *interface)
1463 {
1464         struct stk_camera *dev = usb_get_intfdata(interface);
1465
1466         usb_set_intfdata(interface, NULL);
1467         unset_present(dev);
1468
1469         wake_up_interruptible(&dev->wait_frame);
1470         stk_remove_sysfs_files(&dev->vdev);
1471
1472         kref_put(&dev->kref, stk_camera_cleanup);
1473 }
1474
1475 #ifdef CONFIG_PM
1476 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1477 {
1478         struct stk_camera *dev = usb_get_intfdata(intf);
1479         if (is_streaming(dev)) {
1480                 stk_stop_stream(dev);
1481                 /* yes, this is ugly */
1482                 set_streaming(dev);
1483         }
1484         return 0;
1485 }
1486
1487 static int stk_camera_resume(struct usb_interface *intf)
1488 {
1489         struct stk_camera *dev = usb_get_intfdata(intf);
1490         if (!is_initialised(dev))
1491                 return 0;
1492         unset_initialised(dev);
1493         stk_initialise(dev);
1494         stk_setup_format(dev);
1495         if (is_streaming(dev))
1496                 stk_start_stream(dev);
1497         return 0;
1498 }
1499 #endif
1500
1501 static struct usb_driver stk_camera_driver = {
1502         .name = "stkwebcam",
1503         .probe = stk_camera_probe,
1504         .disconnect = stk_camera_disconnect,
1505         .id_table = stkwebcam_table,
1506 #ifdef CONFIG_PM
1507         .suspend = stk_camera_suspend,
1508         .resume = stk_camera_resume,
1509 #endif
1510 };
1511
1512
1513 static int __init stk_camera_init(void)
1514 {
1515         int result;
1516
1517         result = usb_register(&stk_camera_driver);
1518         if (result)
1519                 STK_ERROR("usb_register failed ! Error number %d\n", result);
1520
1521
1522         return result;
1523 }
1524
1525 static void __exit stk_camera_exit(void)
1526 {
1527         usb_deregister(&stk_camera_driver);
1528 }
1529
1530 module_init(stk_camera_init);
1531 module_exit(stk_camera_exit);
1532
1533