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