drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@infradead.org>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  10                 by Luca Risolia <luca.risolia@studio.unibo.it>
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/list.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/bitmap.h>
  32 #include <linux/usb.h>
  33 #include <linux/i2c.h>
  34 #include <linux/version.h>
  35 #include <linux/mm.h>
  36 #include <linux/video_decoder.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/msp3400.h>
  42
  43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  44                       "Markus Rechberger <mrechberger@gmail.com>, " \
  45                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  46                       "Sascha Sommer <saschasommer@freenet.de>"
  47
  48 #define DRIVER_NAME         "em28xx"
  49 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  50 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  51
  52 #define em28xx_videodbg(fmt, arg...) do {\
  53         if (video_debug) \
  54                 printk(KERN_INFO "%s %s :"fmt, \
  55                          dev->name, __FUNCTION__ , ##arg); } while (0)
  56
  57 MODULE_AUTHOR(DRIVER_AUTHOR);
  58 MODULE_DESCRIPTION(DRIVER_DESC);
  59 MODULE_LICENSE("GPL");
  60
  61 static LIST_HEAD(em28xx_devlist);
  62
  63 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  66 module_param_array(card,  int, NULL, 0444);
  67 module_param_array(video_nr, int, NULL, 0444);
  68 module_param_array(vbi_nr, int, NULL, 0444);
  69 MODULE_PARM_DESC(card,"card type");
  70 MODULE_PARM_DESC(video_nr,"video device numbers");
  71 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
  72
  73 static unsigned int video_debug = 0;
  74 module_param(video_debug,int,0644);
  75 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  76
  77 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  78 static unsigned long em28xx_devused;
  79
  80 /* supported tv norms */
  81 static struct em28xx_tvnorm tvnorms[] = {
  82         {
  83                 .name = "PAL",
  84                 .id = V4L2_STD_PAL,
  85                 .mode = VIDEO_MODE_PAL,
  86          }, {
  87                 .name = "NTSC",
  88                 .id = V4L2_STD_NTSC,
  89                 .mode = VIDEO_MODE_NTSC,
  90         }, {
  91                  .name = "SECAM",
  92                  .id = V4L2_STD_SECAM,
  93                  .mode = VIDEO_MODE_SECAM,
  94         }, {
  95                 .name = "PAL-M",
  96                 .id = V4L2_STD_PAL_M,
  97                 .mode = VIDEO_MODE_PAL,
  98         }
  99 };
 100
 101 #define TVNORMS ARRAY_SIZE(tvnorms)
 102
 103 /* supported controls */
 104 /* Common to all boards */
 105 static struct v4l2_queryctrl em28xx_qctrl[] = {
 106         {
 107                 .id = V4L2_CID_AUDIO_VOLUME,
 108                 .type = V4L2_CTRL_TYPE_INTEGER,
 109                 .name = "Volume",
 110                 .minimum = 0x0,
 111                 .maximum = 0x1f,
 112                 .step = 0x1,
 113                 .default_value = 0x1f,
 114                 .flags = 0,
 115         },{
 116                 .id = V4L2_CID_AUDIO_MUTE,
 117                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 118                 .name = "Mute",
 119                 .minimum = 0,
 120                 .maximum = 1,
 121                 .step = 1,
 122                 .default_value = 1,
 123                 .flags = 0,
 124         }
 125 };
 126
 127 static struct usb_driver em28xx_usb_driver;
 128
 129
 130 /*********************  v4l2 interface  ******************************************/
 131
 132 /*
 133  * em28xx_config()
 134  * inits registers with sane defaults
 135  */
 136 static int em28xx_config(struct em28xx *dev)
 137 {
 138
 139         /* Sets I2C speed to 100 KHz */
 140         if (!dev->is_em2800)
 141                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 142
 143         /* enable vbi capturing */
 144
 145 /*      em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
 146 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 147         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 148
 149         em28xx_audio_usb_mute(dev, 1);
 150         dev->mute = 1;          /* maybe not the right place... */
 151         dev->volume = 0x1f;
 152         em28xx_audio_analog_set(dev);
 153         em28xx_audio_analog_setup(dev);
 154         em28xx_outfmt_set_yuv422(dev);
 155         em28xx_colorlevels_set_default(dev);
 156         em28xx_compression_disable(dev);
 157
 158         return 0;
 159 }
 160
 161 /*
 162  * em28xx_config_i2c()
 163  * configure i2c attached devices
 164  */
 165 static void em28xx_config_i2c(struct em28xx *dev)
 166 {
 167         struct v4l2_routing route;
 168
 169         route.input = INPUT(dev->ctl_input)->vmux;
 170         route.output = 0;
 171         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 172         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 173         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 174 }
 175
 176 /*
 177  * em28xx_empty_framequeues()
 178  * prepare queues for incoming and outgoing frames
 179  */
 180 static void em28xx_empty_framequeues(struct em28xx *dev)
 181 {
 182         u32 i;
 183
 184         INIT_LIST_HEAD(&dev->inqueue);
 185         INIT_LIST_HEAD(&dev->outqueue);
 186
 187         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 188                 dev->frame[i].state = F_UNUSED;
 189                 dev->frame[i].buf.bytesused = 0;
 190         }
 191 }
 192
 193 static void video_mux(struct em28xx *dev, int index)
 194 {
 195         int ainput;
 196         struct v4l2_routing route;
 197
 198         route.input = INPUT(index)->vmux;
 199         route.output = 0;
 200         dev->ctl_input = index;
 201         dev->ctl_ainput = INPUT(index)->amux;
 202
 203         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 204
 205         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
 206
 207         if (dev->has_msp34xx) {
 208                 if (dev->i2s_speed)
 209                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 210                 route.input = dev->ctl_ainput;
 211                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 212                 /* Note: this is msp3400 specific */
 213                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
 214                 ainput = EM28XX_AUDIO_SRC_TUNER;
 215                 em28xx_audio_source(dev, ainput);
 216         } else {
 217                 switch (dev->ctl_ainput) {
 218                         case 0:
 219                                 ainput = EM28XX_AUDIO_SRC_TUNER;
 220                                 break;
 221                         default:
 222                                 ainput = EM28XX_AUDIO_SRC_LINE;
 223                 }
 224                 em28xx_audio_source(dev, ainput);
 225         }
 226 }
 227
 228 /*
 229  * em28xx_v4l2_open()
 230  * inits the device and starts isoc transfer
 231  */
 232 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 233 {
 234         int minor = iminor(inode);
 235         int errCode = 0;
 236         struct em28xx *h,*dev = NULL;
 237
 238         list_for_each_entry(h, &em28xx_devlist, devlist) {
 239                 if (h->vdev->minor == minor) {
 240                         dev  = h;
 241                         dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 242                 }
 243                 if (h->vbi_dev->minor == minor) {
 244                         dev  = h;
 245                         dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 246                 }
 247         }
 248         if (NULL == dev)
 249                 return -ENODEV;
 250
 251         em28xx_videodbg("open minor=%d type=%s users=%d\n",
 252                                 minor,v4l2_type_names[dev->type],dev->users);
 253
 254         mutex_lock(&dev->lock);
 255
 256         if (dev->users) {
 257                 em28xx_warn("this driver can be opened only once\n");
 258                 mutex_unlock(&dev->lock);
 259                 return -EBUSY;
 260         }
 261
 262         spin_lock_init(&dev->queue_lock);
 263         init_waitqueue_head(&dev->wait_frame);
 264         init_waitqueue_head(&dev->wait_stream);
 265
 266         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 267                 em28xx_set_alternate(dev);
 268
 269                 dev->width = norm_maxw(dev);
 270                 dev->height = norm_maxh(dev);
 271                 dev->frame_size = dev->width * dev->height * 2;
 272                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 273                 dev->bytesperline = dev->width * 2;
 274                 dev->hscale = 0;
 275                 dev->vscale = 0;
 276
 277                 em28xx_capture_start(dev, 1);
 278                 em28xx_resolution_set(dev);
 279
 280                 /* device needs to be initialized before isoc transfer */
 281                 video_mux(dev, 0);
 282
 283                 /* start the transfer */
 284                 errCode = em28xx_init_isoc(dev);
 285                 if (errCode)
 286                         goto err;
 287
 288         }
 289
 290         dev->users++;
 291         filp->private_data = dev;
 292         dev->io = IO_NONE;
 293         dev->stream = STREAM_OFF;
 294         dev->num_frames = 0;
 295
 296         /* prepare queues */
 297         em28xx_empty_framequeues(dev);
 298
 299         dev->state |= DEV_INITIALIZED;
 300
 301 err:
 302         mutex_unlock(&dev->lock);
 303         return errCode;
 304 }
 305
 306 /*
 307  * em28xx_realease_resources()
 308  * unregisters the v4l2,i2c and usb devices
 309  * called when the device gets disconected or at module unload
 310 */
 311 static void em28xx_release_resources(struct em28xx *dev)
 312 {
 313
 314         /*FIXME: I2C IR should be disconnected */
 315
 316         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
 317                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
 318                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
 319         list_del(&dev->devlist);
 320         video_unregister_device(dev->vdev);
 321         video_unregister_device(dev->vbi_dev);
 322         em28xx_i2c_unregister(dev);
 323         usb_put_dev(dev->udev);
 324
 325
 326         /* Mark device as unused */
 327         em28xx_devused&=~(1<<dev->devno);
 328 }
 329
 330 /*
 331  * em28xx_v4l2_close()
 332  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 333  */
 334 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 335 {
 336         int errCode;
 337         struct em28xx *dev=filp->private_data;
 338
 339         em28xx_videodbg("users=%d\n", dev->users);
 340
 341         mutex_lock(&dev->lock);
 342
 343         em28xx_uninit_isoc(dev);
 344
 345         em28xx_release_buffers(dev);
 346
 347         /* the device is already disconnect, free the remaining resources */
 348         if (dev->state & DEV_DISCONNECTED) {
 349                 em28xx_release_resources(dev);
 350                 mutex_unlock(&dev->lock);
 351                 kfree(dev);
 352                 return 0;
 353         }
 354
 355         /* set alternate 0 */
 356         dev->alt = 0;
 357         em28xx_videodbg("setting alternate 0\n");
 358         errCode = usb_set_interface(dev->udev, 0, 0);
 359         if (errCode < 0) {
 360                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 361                      errCode);
 362         }
 363
 364         dev->users--;
 365         wake_up_interruptible_nr(&dev->open, 1);
 366         mutex_unlock(&dev->lock);
 367         return 0;
 368 }
 369
 370 /*
 371  * em28xx_v4l2_read()
 372  * will allocate buffers when called for the first time
 373  */
 374 static ssize_t
 375 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 376                  loff_t * f_pos)
 377 {
 378         struct em28xx_frame_t *f, *i;
 379         unsigned long lock_flags;
 380         int ret = 0;
 381         struct em28xx *dev = filp->private_data;
 382
 383         mutex_lock(&dev->lock);
 384
 385         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 386                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
 387         }
 388         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 389                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
 390                 em28xx_videodbg("not supported yet! ...\n");
 391                 if (copy_to_user(buf, "", 1)) {
 392                         mutex_unlock(&dev->lock);
 393                         return -EFAULT;
 394                 }
 395                 mutex_unlock(&dev->lock);
 396                 return (1);
 397         }
 398         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 399                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
 400                 em28xx_videodbg("not supported yet! ...\n");
 401                 if (copy_to_user(buf, "", 1)) {
 402                         mutex_unlock(&dev->lock);
 403                         return -EFAULT;
 404                 }
 405                 mutex_unlock(&dev->lock);
 406                 return (1);
 407         }
 408
 409         if (dev->state & DEV_DISCONNECTED) {
 410                 em28xx_videodbg("device not present\n");
 411                 mutex_unlock(&dev->lock);
 412                 return -ENODEV;
 413         }
 414
 415         if (dev->state & DEV_MISCONFIGURED) {
 416                 em28xx_videodbg("device misconfigured; close and open it again\n");
 417                 mutex_unlock(&dev->lock);
 418                 return -EIO;
 419         }
 420
 421         if (dev->io == IO_MMAP) {
 422                 em28xx_videodbg ("IO method is set to mmap; close and open"
 423                                 " the device again to choose the read method\n");
 424                 mutex_unlock(&dev->lock);
 425                 return -EINVAL;
 426         }
 427
 428         if (dev->io == IO_NONE) {
 429                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 430                         em28xx_errdev("read failed, not enough memory\n");
 431                         mutex_unlock(&dev->lock);
 432                         return -ENOMEM;
 433                 }
 434                 dev->io = IO_READ;
 435                 dev->stream = STREAM_ON;
 436                 em28xx_queue_unusedframes(dev);
 437         }
 438
 439         if (!count) {
 440                 mutex_unlock(&dev->lock);
 441                 return 0;
 442         }
 443
 444         if (list_empty(&dev->outqueue)) {
 445                 if (filp->f_flags & O_NONBLOCK) {
 446                         mutex_unlock(&dev->lock);
 447                         return -EAGAIN;
 448                 }
 449                 ret = wait_event_interruptible
 450                     (dev->wait_frame,
 451                      (!list_empty(&dev->outqueue)) ||
 452                      (dev->state & DEV_DISCONNECTED));
 453                 if (ret) {
 454                         mutex_unlock(&dev->lock);
 455                         return ret;
 456                 }
 457                 if (dev->state & DEV_DISCONNECTED) {
 458                         mutex_unlock(&dev->lock);
 459                         return -ENODEV;
 460                 }
 461         }
 462
 463         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 464
 465         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 466         list_for_each_entry(i, &dev->outqueue, frame)
 467             i->state = F_UNUSED;
 468         INIT_LIST_HEAD(&dev->outqueue);
 469         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 470
 471         em28xx_queue_unusedframes(dev);
 472
 473         if (count > f->buf.length)
 474                 count = f->buf.length;
 475
 476         if (copy_to_user(buf, f->bufmem, count)) {
 477                 mutex_unlock(&dev->lock);
 478                 return -EFAULT;
 479         }
 480         *f_pos += count;
 481
 482         mutex_unlock(&dev->lock);
 483
 484         return count;
 485 }
 486
 487 /*
 488  * em28xx_v4l2_poll()
 489  * will allocate buffers when called for the first time
 490  */
 491 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 492 {
 493         unsigned int mask = 0;
 494         struct em28xx *dev = filp->private_data;
 495
 496         mutex_lock(&dev->lock);
 497
 498         if (dev->state & DEV_DISCONNECTED) {
 499                 em28xx_videodbg("device not present\n");
 500         } else if (dev->state & DEV_MISCONFIGURED) {
 501                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 502         } else {
 503                 if (dev->io == IO_NONE) {
 504                         if (!em28xx_request_buffers
 505                             (dev, EM28XX_NUM_READ_FRAMES)) {
 506                                 em28xx_warn
 507                                     ("poll() failed, not enough memory\n");
 508                         } else {
 509                                 dev->io = IO_READ;
 510                                 dev->stream = STREAM_ON;
 511                         }
 512                 }
 513
 514                 if (dev->io == IO_READ) {
 515                         em28xx_queue_unusedframes(dev);
 516                         poll_wait(filp, &dev->wait_frame, wait);
 517
 518                         if (!list_empty(&dev->outqueue))
 519                                 mask |= POLLIN | POLLRDNORM;
 520
 521                         mutex_unlock(&dev->lock);
 522
 523                         return mask;
 524                 }
 525         }
 526
 527         mutex_unlock(&dev->lock);
 528         return POLLERR;
 529 }
 530
 531 /*
 532  * em28xx_vm_open()
 533  */
 534 static void em28xx_vm_open(struct vm_area_struct *vma)
 535 {
 536         struct em28xx_frame_t *f = vma->vm_private_data;
 537         f->vma_use_count++;
 538 }
 539
 540 /*
 541  * em28xx_vm_close()
 542  */
 543 static void em28xx_vm_close(struct vm_area_struct *vma)
 544 {
 545         /* NOTE: buffers are not freed here */
 546         struct em28xx_frame_t *f = vma->vm_private_data;
 547
 548         if (f->vma_use_count)
 549                 f->vma_use_count--;
 550 }
 551
 552 static struct vm_operations_struct em28xx_vm_ops = {
 553         .open = em28xx_vm_open,
 554         .close = em28xx_vm_close,
 555 };
 556
 557 /*
 558  * em28xx_v4l2_mmap()
 559  */
 560 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 561 {
 562         unsigned long size = vma->vm_end - vma->vm_start,
 563             start = vma->vm_start;
 564         void *pos;
 565         u32 i;
 566
 567         struct em28xx *dev = filp->private_data;
 568
 569         mutex_lock(&dev->lock);
 570
 571         if (dev->state & DEV_DISCONNECTED) {
 572                 em28xx_videodbg("mmap: device not present\n");
 573                 mutex_unlock(&dev->lock);
 574                 return -ENODEV;
 575         }
 576
 577         if (dev->state & DEV_MISCONFIGURED) {
 578                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 579                                                 "open it again\n");
 580                 mutex_unlock(&dev->lock);
 581                 return -EIO;
 582         }
 583
 584         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 585             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 586                 mutex_unlock(&dev->lock);
 587                 return -EINVAL;
 588         }
 589
 590         for (i = 0; i < dev->num_frames; i++) {
 591                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 592                         break;
 593         }
 594         if (i == dev->num_frames) {
 595                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 596                 mutex_unlock(&dev->lock);
 597                 return -EINVAL;
 598         }
 599
 600         /* VM_IO is eventually going to replace PageReserved altogether */
 601         vma->vm_flags |= VM_IO;
 602         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 603
 604         pos = dev->frame[i].bufmem;
 605         while (size > 0) {      /* size is page-aligned */
 606                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 607                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 608                         mutex_unlock(&dev->lock);
 609                         return -EAGAIN;
 610                 }
 611                 start += PAGE_SIZE;
 612                 pos += PAGE_SIZE;
 613                 size -= PAGE_SIZE;
 614         }
 615
 616         vma->vm_ops = &em28xx_vm_ops;
 617         vma->vm_private_data = &dev->frame[i];
 618
 619         em28xx_vm_open(vma);
 620         mutex_unlock(&dev->lock);
 621         return 0;
 622 }
 623
 624 /*
 625  * em28xx_get_ctrl()
 626  * return the current saturation, brightness or contrast, mute state
 627  */
 628 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 629 {
 630         switch (ctrl->id) {
 631         case V4L2_CID_AUDIO_MUTE:
 632                 ctrl->value = dev->mute;
 633                 return 0;
 634         case V4L2_CID_AUDIO_VOLUME:
 635                 ctrl->value = dev->volume;
 636                 return 0;
 637         default:
 638                 return -EINVAL;
 639         }
 640 }
 641
 642 /*
 643  * em28xx_set_ctrl()
 644  * mute or set new saturation, brightness or contrast
 645  */
 646 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 647 {
 648         switch (ctrl->id) {
 649         case V4L2_CID_AUDIO_MUTE:
 650                 if (ctrl->value != dev->mute) {
 651                         dev->mute = ctrl->value;
 652                         em28xx_audio_usb_mute(dev, ctrl->value);
 653                         return em28xx_audio_analog_set(dev);
 654                 }
 655                 return 0;
 656         case V4L2_CID_AUDIO_VOLUME:
 657                 dev->volume = ctrl->value;
 658                 return em28xx_audio_analog_set(dev);
 659         default:
 660                 return -EINVAL;
 661         }
 662 }
 663
 664 /*
 665  * em28xx_stream_interrupt()
 666  * stops streaming
 667  */
 668 static int em28xx_stream_interrupt(struct em28xx *dev)
 669 {
 670         int ret = 0;
 671
 672         /* stop reading from the device */
 673
 674         dev->stream = STREAM_INTERRUPT;
 675         ret = wait_event_timeout(dev->wait_stream,
 676                                  (dev->stream == STREAM_OFF) ||
 677                                  (dev->state & DEV_DISCONNECTED),
 678                                  EM28XX_URB_TIMEOUT);
 679         if (dev->state & DEV_DISCONNECTED)
 680                 return -ENODEV;
 681         else if (ret) {
 682                 dev->state |= DEV_MISCONFIGURED;
 683                 em28xx_videodbg("device is misconfigured; close and "
 684                         "open /dev/video%d again\n",
 685                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
 686                 return ret;
 687         }
 688
 689         return 0;
 690 }
 691
 692 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 693 {
 694         unsigned int hscale, vscale;
 695         unsigned int maxh, maxw;
 696
 697         maxw = norm_maxw(dev);
 698         maxh = norm_maxh(dev);
 699
 700         /* width must even because of the YUYV format */
 701         /* height must be even because of interlacing */
 702         height &= 0xfffe;
 703         width &= 0xfffe;
 704
 705         if (height < 32)
 706                 height = 32;
 707         if (height > maxh)
 708                 height = maxh;
 709         if (width < 48)
 710                 width = 48;
 711         if (width > maxw)
 712                 width = maxw;
 713
 714         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 715                 hscale = 0x3fff;
 716         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 717
 718         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 719                 vscale = 0x3fff;
 720         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 721
 722         /* set new image size */
 723         dev->width = width;
 724         dev->height = height;
 725         dev->frame_size = dev->width * dev->height * 2;
 726         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 727         dev->bytesperline = dev->width * 2;
 728         dev->hscale = hscale;
 729         dev->vscale = vscale;
 730
 731         em28xx_resolution_set(dev);
 732
 733         return 0;
 734 }
 735
 736 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
 737 {
 738         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
 739                 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 740                 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 741                 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
 742                 "V4L2_BUF_TYPE_VBI_CAPTURE" :
 743                 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
 744                 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
 745                 "not supported");
 746
 747         switch (format->type) {
 748         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 749         {
 750                 format->fmt.pix.width = dev->width;
 751                 format->fmt.pix.height = dev->height;
 752                 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 753                 format->fmt.pix.bytesperline = dev->bytesperline;
 754                 format->fmt.pix.sizeimage = dev->frame_size;
 755                 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 756                 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 757
 758                 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
 759                         dev->height);
 760                 break;
 761         }
 762
 763         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 764         {
 765                 format->fmt.sliced.service_set=0;
 766
 767                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 768
 769                 if (format->fmt.sliced.service_set==0)
 770                         return -EINVAL;
 771
 772                 break;
 773         }
 774
 775         default:
 776                 return -EINVAL;
 777         }
 778         return (0);
 779 }
 780
 781 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
 782 {
 783         u32 i;
 784         int ret = 0;
 785         int width = format->fmt.pix.width;
 786         int height = format->fmt.pix.height;
 787         unsigned int hscale, vscale;
 788         unsigned int maxh, maxw;
 789
 790         maxw = norm_maxw(dev);
 791         maxh = norm_maxh(dev);
 792
 793         em28xx_videodbg("%s: type=%s\n",
 794                         cmd == VIDIOC_TRY_FMT ?
 795                         "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 796                         format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
 797                         "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 798                         format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
 799                         "V4L2_BUF_TYPE_VBI_CAPTURE " :
 800                         "not supported");
 801
 802         if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 803                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 804
 805                 if (format->fmt.sliced.service_set==0)
 806                         return -EINVAL;
 807
 808                 return 0;
 809         }
 810
 811
 812         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 813                 return -EINVAL;
 814
 815         em28xx_videodbg("%s: requested %dx%d\n",
 816                 cmd == VIDIOC_TRY_FMT ?
 817                 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 818                 format->fmt.pix.width, format->fmt.pix.height);
 819
 820         /* FIXME: Move some code away from here */
 821         /* width must even because of the YUYV format */
 822         /* height must be even because of interlacing */
 823         height &= 0xfffe;
 824         width &= 0xfffe;
 825
 826         if (height < 32)
 827                 height = 32;
 828         if (height > maxh)
 829                 height = maxh;
 830         if (width < 48)
 831                 width = 48;
 832         if (width > maxw)
 833                 width = maxw;
 834
 835         if(dev->is_em2800){
 836                 /* the em2800 can only scale down to 50% */
 837                 if(height % (maxh / 2))
 838                         height=maxh;
 839                 if(width % (maxw / 2))
 840                         width=maxw;
 841                 /* according to empiatech support */
 842                 /* the MaxPacketSize is to small to support */
 843                 /* framesizes larger than 640x480 @ 30 fps */
 844                 /* or 640x576 @ 25 fps. As this would cut */
 845                 /* of a part of the image we prefer */
 846                 /* 360x576 or 360x480 for now */
 847                 if(width == maxw && height == maxh)
 848                         width /= 2;
 849         }
 850
 851         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 852                 hscale = 0x3fff;
 853
 854         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 855
 856         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 857                 vscale = 0x3fff;
 858
 859         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 860
 861         format->fmt.pix.width = width;
 862         format->fmt.pix.height = height;
 863         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 864         format->fmt.pix.bytesperline = width * 2;
 865         format->fmt.pix.sizeimage = width * 2 * height;
 866         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 867         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
 868
 869         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
 870                 cmd == VIDIOC_TRY_FMT ?
 871                 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
 872                 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
 873
 874         if (cmd == VIDIOC_TRY_FMT)
 875                 return 0;
 876
 877         for (i = 0; i < dev->num_frames; i++)
 878                 if (dev->frame[i].vma_use_count) {
 879                         em28xx_videodbg("VIDIOC_S_FMT failed. "
 880                                 "Unmap the buffers first.\n");
 881                         return -EINVAL;
 882                 }
 883
 884         /* stop io in case it is already in progress */
 885         if (dev->stream == STREAM_ON) {
 886                 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
 887                 if ((ret = em28xx_stream_interrupt(dev)))
 888                         return ret;
 889         }
 890
 891         em28xx_release_buffers(dev);
 892         dev->io = IO_NONE;
 893
 894         /* set new image size */
 895         dev->width = width;
 896         dev->height = height;
 897         dev->frame_size = dev->width * dev->height * 2;
 898         dev->field_size = dev->frame_size >> 1;
 899         dev->bytesperline = dev->width * 2;
 900         dev->hscale = hscale;
 901         dev->vscale = vscale;
 902         em28xx_uninit_isoc(dev);
 903         em28xx_set_alternate(dev);
 904         em28xx_capture_start(dev, 1);
 905         em28xx_resolution_set(dev);
 906         em28xx_init_isoc(dev);
 907
 908         return 0;
 909 }
 910
 911 /*
 912  * em28xx_v4l2_do_ioctl()
 913  * This function is _not_ called directly, but from
 914  * em28xx_v4l2_ioctl. Userspace
 915  * copying is done already, arg is a kernel pointer.
 916  */
 917 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 918                            struct em28xx *dev, unsigned int cmd, void *arg,
 919                            v4l2_kioctl driver_ioctl)
 920 {
 921         int ret;
 922
 923         switch (cmd) {
 924                 /* ---------- tv norms ---------- */
 925         case VIDIOC_ENUMSTD:
 926         {
 927                 struct v4l2_standard *e = arg;
 928                 unsigned int i;
 929
 930                 i = e->index;
 931                 if (i >= TVNORMS)
 932                         return -EINVAL;
 933                 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 934                                                 tvnorms[e->index].name);
 935                 e->index = i;
 936                 if (ret < 0)
 937                         return ret;
 938                 return 0;
 939         }
 940         case VIDIOC_G_STD:
 941         {
 942                 v4l2_std_id *id = arg;
 943
 944                 *id = dev->tvnorm->id;
 945                 return 0;
 946         }
 947         case VIDIOC_S_STD:
 948         {
 949                 v4l2_std_id *id = arg;
 950                 unsigned int i;
 951
 952                 for (i = 0; i < TVNORMS; i++)
 953                         if (*id == tvnorms[i].id)
 954                                 break;
 955                 if (i == TVNORMS)
 956                         for (i = 0; i < TVNORMS; i++)
 957                                 if (*id & tvnorms[i].id)
 958                                         break;
 959                 if (i == TVNORMS)
 960                         return -EINVAL;
 961
 962                 mutex_lock(&dev->lock);
 963                 dev->tvnorm = &tvnorms[i];
 964
 965                 em28xx_set_norm(dev, dev->width, dev->height);
 966
 967                 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 968                                         &dev->tvnorm->id);
 969
 970                 mutex_unlock(&dev->lock);
 971
 972                 return 0;
 973         }
 974
 975         /* ------ input switching ---------- */
 976         case VIDIOC_ENUMINPUT:
 977         {
 978                 struct v4l2_input *i = arg;
 979                 unsigned int n;
 980                 static const char *iname[] = {
 981                         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 982                         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 983                         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 984                         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 985                         [EM28XX_VMUX_SVIDEO] = "S-Video",
 986                         [EM28XX_VMUX_TELEVISION] = "Television",
 987                         [EM28XX_VMUX_CABLE] = "Cable TV",
 988                         [EM28XX_VMUX_DVB] = "DVB",
 989                         [EM28XX_VMUX_DEBUG] = "for debug only",
 990                 };
 991
 992                 n = i->index;
 993                 if (n >= MAX_EM28XX_INPUT)
 994                         return -EINVAL;
 995                 if (0 == INPUT(n)->type)
 996                         return -EINVAL;
 997                 memset(i, 0, sizeof(*i));
 998                 i->index = n;
 999                 i->type = V4L2_INPUT_TYPE_CAMERA;
1000                 strcpy(i->name, iname[INPUT(n)->type]);
1001                 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1002                         (EM28XX_VMUX_CABLE == INPUT(n)->type))
1003                         i->type = V4L2_INPUT_TYPE_TUNER;
1004                 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1005                         i->std |= tvnorms[n].id;
1006                 return 0;
1007         }
1008         case VIDIOC_G_INPUT:
1009         {
1010                 int *i = arg;
1011                 *i = dev->ctl_input;
1012
1013                 return 0;
1014         }
1015         case VIDIOC_S_INPUT:
1016         {
1017                 int *index = arg;
1018
1019                 if (*index >= MAX_EM28XX_INPUT)
1020                         return -EINVAL;
1021                 if (0 == INPUT(*index)->type)
1022                         return -EINVAL;
1023
1024                 mutex_lock(&dev->lock);
1025                 video_mux(dev, *index);
1026                 mutex_unlock(&dev->lock);
1027
1028                 return 0;
1029         }
1030         case VIDIOC_G_AUDIO:
1031         {
1032                 struct v4l2_audio *a = arg;
1033                 unsigned int index = a->index;
1034
1035                 if (a->index > 1)
1036                         return -EINVAL;
1037                 memset(a, 0, sizeof(*a));
1038                 index = dev->ctl_ainput;
1039
1040                 if (index == 0) {
1041                         strcpy(a->name, "Television");
1042                 } else {
1043                         strcpy(a->name, "Line In");
1044                 }
1045                 a->capability = V4L2_AUDCAP_STEREO;
1046                 a->index = index;
1047                 return 0;
1048         }
1049         case VIDIOC_S_AUDIO:
1050         {
1051                 struct v4l2_audio *a = arg;
1052
1053                 if (a->index != dev->ctl_ainput)
1054                         return -EINVAL;
1055
1056                 return 0;
1057         }
1058
1059         /* --- controls ---------------------------------------------- */
1060         case VIDIOC_QUERYCTRL:
1061         {
1062                 struct v4l2_queryctrl *qc = arg;
1063                 int i, id=qc->id;
1064
1065                 memset(qc,0,sizeof(*qc));
1066                 qc->id=id;
1067
1068                 if (!dev->has_msp34xx) {
1069                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1070                                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1071                                         memcpy(qc, &(em28xx_qctrl[i]),
1072                                         sizeof(*qc));
1073                                         return 0;
1074                                 }
1075                         }
1076                 }
1077                 mutex_lock(&dev->lock);
1078                 em28xx_i2c_call_clients(dev,cmd,qc);
1079                 mutex_unlock(&dev->lock);
1080                 if (qc->type)
1081                         return 0;
1082                 else
1083                         return -EINVAL;
1084         }
1085         case VIDIOC_G_CTRL:
1086         {
1087                 struct v4l2_control *ctrl = arg;
1088                 int retval=-EINVAL;
1089
1090                 if (!dev->has_msp34xx)
1091                         retval=em28xx_get_ctrl(dev, ctrl);
1092                 if (retval==-EINVAL) {
1093                         mutex_lock(&dev->lock);
1094                         em28xx_i2c_call_clients(dev,cmd,arg);
1095                         mutex_unlock(&dev->lock);
1096                         return 0;
1097                 } else return retval;
1098         }
1099         case VIDIOC_S_CTRL:
1100         {
1101                 struct v4l2_control *ctrl = arg;
1102                 u8 i;
1103                 mutex_lock(&dev->lock);
1104
1105                 if (!dev->has_msp34xx){
1106                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1107                                 if (ctrl->id == em28xx_qctrl[i].id) {
1108                                         int retval=-EINVAL;
1109                                         if (ctrl->value <
1110                                         em28xx_qctrl[i].minimum
1111                                         || ctrl->value >
1112                                         em28xx_qctrl[i].maximum)
1113                                                 return -ERANGE;
1114                                         retval = em28xx_set_ctrl(dev, ctrl);
1115                                         mutex_unlock(&dev->lock);
1116                                         return retval;
1117                                 }
1118                         }
1119                 }
1120
1121                 em28xx_i2c_call_clients(dev,cmd,arg);
1122                 mutex_unlock(&dev->lock);
1123                 return 0;
1124         }
1125         /* --- tuner ioctls ------------------------------------------ */
1126         case VIDIOC_G_TUNER:
1127         {
1128                 struct v4l2_tuner *t = arg;
1129
1130                 if (0 != t->index)
1131                         return -EINVAL;
1132
1133                 memset(t, 0, sizeof(*t));
1134                 strcpy(t->name, "Tuner");
1135                 mutex_lock(&dev->lock);
1136                 /* let clients fill in the remainder of this struct */
1137                 em28xx_i2c_call_clients(dev, cmd, t);
1138                 mutex_unlock(&dev->lock);
1139                 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1140                                 t->afc);
1141                 return 0;
1142         }
1143         case VIDIOC_S_TUNER:
1144         {
1145                 struct v4l2_tuner *t = arg;
1146
1147                 if (0 != t->index)
1148                         return -EINVAL;
1149                 mutex_lock(&dev->lock);
1150                 /* let clients handle this */
1151                 em28xx_i2c_call_clients(dev, cmd, t);
1152                 mutex_unlock(&dev->lock);
1153                 return 0;
1154         }
1155         case VIDIOC_G_FREQUENCY:
1156         {
1157                 struct v4l2_frequency *f = arg;
1158
1159                 memset(f, 0, sizeof(*f));
1160                 f->type = V4L2_TUNER_ANALOG_TV;
1161                 f->frequency = dev->ctl_freq;
1162
1163                 return 0;
1164         }
1165         case VIDIOC_S_FREQUENCY:
1166         {
1167                 struct v4l2_frequency *f = arg;
1168
1169                 if (0 != f->tuner)
1170                         return -EINVAL;
1171
1172                 if (V4L2_TUNER_ANALOG_TV != f->type)
1173                         return -EINVAL;
1174
1175                 mutex_lock(&dev->lock);
1176                 dev->ctl_freq = f->frequency;
1177                 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1178                 mutex_unlock(&dev->lock);
1179                 return 0;
1180         }
1181         case VIDIOC_CROPCAP:
1182         {
1183                 struct v4l2_cropcap *cc = arg;
1184
1185                 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1186                         return -EINVAL;
1187                 cc->bounds.left = 0;
1188                 cc->bounds.top = 0;
1189                 cc->bounds.width = dev->width;
1190                 cc->bounds.height = dev->height;
1191                 cc->defrect = cc->bounds;
1192                 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1193                 cc->pixelaspect.denominator = 59;
1194                 return 0;
1195         }
1196         case VIDIOC_STREAMON:
1197         {
1198                 int *type = arg;
1199
1200                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1201                         || dev->io != IO_MMAP)
1202                         return -EINVAL;
1203
1204                 if (list_empty(&dev->inqueue))
1205                         return -EINVAL;
1206
1207                 dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1208
1209                 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1210
1211                 return 0;
1212         }
1213         case VIDIOC_STREAMOFF:
1214         {
1215                 int *type = arg;
1216                 int ret;
1217
1218                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1219                         || dev->io != IO_MMAP)
1220                         return -EINVAL;
1221
1222                 mutex_lock(&dev->lock);
1223                 if (dev->stream == STREAM_ON) {
1224                         em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1225                         if ((ret = em28xx_stream_interrupt(dev))){
1226                                 mutex_unlock(&dev->lock);
1227                                 return ret;
1228                         }
1229                 }
1230                 em28xx_empty_framequeues(dev);
1231                 mutex_unlock(&dev->lock);
1232
1233                 return 0;
1234         }
1235         default:
1236                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1237                                                   driver_ioctl);
1238         }
1239         return 0;
1240 }
1241
1242 /*
1243  * em28xx_v4l2_do_ioctl()
1244  * This function is _not_ called directly, but from
1245  * em28xx_v4l2_ioctl. Userspace
1246  * copying is done already, arg is a kernel pointer.
1247  */
1248 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1249                                  unsigned int cmd, void *arg)
1250 {
1251         struct em28xx *dev = filp->private_data;
1252
1253         if (!dev)
1254                 return -ENODEV;
1255
1256         if (video_debug > 1)
1257                 v4l_print_ioctl(dev->name,cmd);
1258
1259         switch (cmd) {
1260
1261                 /* --- capabilities ------------------------------------------ */
1262         case VIDIOC_QUERYCAP:
1263                 {
1264                 struct v4l2_capability *cap = arg;
1265
1266                 memset(cap, 0, sizeof(*cap));
1267                 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1268                 strlcpy(cap->card, em28xx_boards[dev->model].name,
1269                         sizeof(cap->card));
1270                 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1271                         sizeof(cap->bus_info));
1272                 cap->version = EM28XX_VERSION_CODE;
1273                 cap->capabilities =
1274                                 V4L2_CAP_SLICED_VBI_CAPTURE |
1275                                 V4L2_CAP_VIDEO_CAPTURE |
1276                                 V4L2_CAP_AUDIO |
1277                                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1278                 if (dev->has_tuner)
1279                         cap->capabilities |= V4L2_CAP_TUNER;
1280                 return 0;
1281         }
1282         /* --- capture ioctls ---------------------------------------- */
1283         case VIDIOC_ENUM_FMT:
1284         {
1285                 struct v4l2_fmtdesc *fmtd = arg;
1286
1287                 if (fmtd->index != 0)
1288                         return -EINVAL;
1289                 memset(fmtd, 0, sizeof(*fmtd));
1290                 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1291                 strcpy(fmtd->description, "Packed YUY2");
1292                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1293                 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1294                 return 0;
1295         }
1296         case VIDIOC_G_FMT:
1297         {
1298                 int retval;
1299                 mutex_lock(&dev->lock);
1300                 retval = em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1301                 mutex_unlock(&dev->lock);
1302                 return retval;
1303
1304         }
1305         case VIDIOC_TRY_FMT:
1306         case VIDIOC_S_FMT:
1307         {
1308                 int retval;
1309                 mutex_lock(&dev->lock);
1310                 retval = em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1311                 mutex_unlock(&dev->lock);
1312                 return retval;
1313         }
1314
1315         case VIDIOC_REQBUFS:
1316         {
1317                 struct v4l2_requestbuffers *rb = arg;
1318                 u32 i;
1319                 int ret;
1320
1321                 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1322                         rb->memory != V4L2_MEMORY_MMAP)
1323                         return -EINVAL;
1324
1325                 if (dev->io == IO_READ) {
1326                         em28xx_videodbg ("method is set to read;"
1327                                 " close and open the device again to"
1328                                 " choose the mmap I/O method\n");
1329                         return -EINVAL;
1330                 }
1331
1332                 for (i = 0; i < dev->num_frames; i++)
1333                         if (dev->frame[i].vma_use_count) {
1334                                 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1335                                 return -EINVAL;
1336                         }
1337
1338                 mutex_lock(&dev->lock);
1339                 if (dev->stream == STREAM_ON) {
1340                         em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1341                         if ((ret = em28xx_stream_interrupt(dev))){
1342                                 mutex_unlock(&dev->lock);
1343                                 return ret;
1344                         }
1345                 }
1346
1347                 em28xx_empty_framequeues(dev);
1348
1349                 em28xx_release_buffers(dev);
1350                 if (rb->count)
1351                         rb->count =
1352                                 em28xx_request_buffers(dev, rb->count);
1353
1354                 dev->frame_current = NULL;
1355
1356                 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1357                                                 rb->count);
1358                 dev->io = rb->count ? IO_MMAP : IO_NONE;
1359                 mutex_unlock(&dev->lock);
1360                 return 0;
1361         }
1362         case VIDIOC_QUERYBUF:
1363         {
1364                 struct v4l2_buffer *b = arg;
1365
1366                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1367                         b->index >= dev->num_frames || dev->io != IO_MMAP)
1368                         return -EINVAL;
1369
1370                 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1371
1372                 if (dev->frame[b->index].vma_use_count) {
1373                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1374                 }
1375                 if (dev->frame[b->index].state == F_DONE)
1376                         b->flags |= V4L2_BUF_FLAG_DONE;
1377                 else if (dev->frame[b->index].state != F_UNUSED)
1378                         b->flags |= V4L2_BUF_FLAG_QUEUED;
1379                 return 0;
1380         }
1381         case VIDIOC_QBUF:
1382         {
1383                 struct v4l2_buffer *b = arg;
1384                 unsigned long lock_flags;
1385
1386                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1387                         b->index >= dev->num_frames || dev->io != IO_MMAP) {
1388                         return -EINVAL;
1389                 }
1390
1391                 if (dev->frame[b->index].state != F_UNUSED) {
1392                         return -EAGAIN;
1393                 }
1394                 dev->frame[b->index].state = F_QUEUED;
1395
1396                 /* add frame to fifo */
1397                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1398                 list_add_tail(&dev->frame[b->index].frame,
1399                                 &dev->inqueue);
1400                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1401
1402                 return 0;
1403         }
1404         case VIDIOC_DQBUF:
1405         {
1406                 struct v4l2_buffer *b = arg;
1407                 struct em28xx_frame_t *f;
1408                 unsigned long lock_flags;
1409                 int ret = 0;
1410
1411                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1412                         || dev->io != IO_MMAP)
1413                         return -EINVAL;
1414
1415                 if (list_empty(&dev->outqueue)) {
1416                         if (dev->stream == STREAM_OFF)
1417                                 return -EINVAL;
1418                         if (filp->f_flags & O_NONBLOCK)
1419                                 return -EAGAIN;
1420                         ret = wait_event_interruptible
1421                                 (dev->wait_frame,
1422                                 (!list_empty(&dev->outqueue)) ||
1423                                 (dev->state & DEV_DISCONNECTED));
1424                         if (ret)
1425                                 return ret;
1426                         if (dev->state & DEV_DISCONNECTED)
1427                                 return -ENODEV;
1428                 }
1429
1430                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1431                 f = list_entry(dev->outqueue.next,
1432                                 struct em28xx_frame_t, frame);
1433                 list_del(dev->outqueue.next);
1434                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1435
1436                 f->state = F_UNUSED;
1437                 memcpy(b, &f->buf, sizeof(*b));
1438
1439                 if (f->vma_use_count)
1440                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1441
1442                 return 0;
1443         }
1444         default:
1445                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1446                                        em28xx_video_do_ioctl);
1447         }
1448         return 0;
1449 }
1450
1451 /*
1452  * em28xx_v4l2_ioctl()
1453  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1454  */
1455 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1456                              unsigned int cmd, unsigned long arg)
1457 {
1458         int ret = 0;
1459         struct em28xx *dev = filp->private_data;
1460
1461         if (dev->state & DEV_DISCONNECTED) {
1462                 em28xx_errdev("v4l2 ioctl: device not present\n");
1463                 return -ENODEV;
1464         }
1465
1466         if (dev->state & DEV_MISCONFIGURED) {
1467                 em28xx_errdev
1468                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1469                 return -EIO;
1470         }
1471
1472         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1473
1474         return ret;
1475 }
1476
1477 static const struct file_operations em28xx_v4l_fops = {
1478         .owner = THIS_MODULE,
1479         .open = em28xx_v4l2_open,
1480         .release = em28xx_v4l2_close,
1481         .ioctl = em28xx_v4l2_ioctl,
1482         .read = em28xx_v4l2_read,
1483         .poll = em28xx_v4l2_poll,
1484         .mmap = em28xx_v4l2_mmap,
1485         .llseek = no_llseek,
1486         .compat_ioctl   = v4l_compat_ioctl32,
1487
1488 };
1489
1490 /******************************** usb interface *****************************************/
1491
1492 /*
1493  * em28xx_init_dev()
1494  * allocates and inits the device structs, registers i2c bus and v4l device
1495  */
1496 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1497                            int minor)
1498 {
1499         struct em28xx *dev = *devhandle;
1500         int retval = -ENOMEM;
1501         int errCode, i;
1502         unsigned int maxh, maxw;
1503
1504         dev->udev = udev;
1505         mutex_init(&dev->lock);
1506         init_waitqueue_head(&dev->open);
1507
1508         dev->em28xx_write_regs = em28xx_write_regs;
1509         dev->em28xx_read_reg = em28xx_read_reg;
1510         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1511         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1512         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1513         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1514
1515         /* setup video picture settings for saa7113h */
1516         memset(&dev->vpic, 0, sizeof(dev->vpic));
1517         dev->vpic.colour = 128 << 8;
1518         dev->vpic.hue = 128 << 8;
1519         dev->vpic.brightness = 128 << 8;
1520         dev->vpic.contrast = 192 << 8;
1521         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1522         dev->vpic.depth = 16;
1523         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1524
1525         em28xx_pre_card_setup(dev);
1526
1527         errCode = em28xx_config(dev);
1528         if (errCode) {
1529                 em28xx_errdev("error configuring device\n");
1530                 em28xx_devused &= ~(1<<dev->devno);
1531                 kfree(dev);
1532                 return -ENOMEM;
1533         }
1534
1535         /* register i2c bus */
1536         em28xx_i2c_register(dev);
1537
1538         /* Do board specific init and eeprom reading */
1539         em28xx_card_setup(dev);
1540
1541         /* configure the device */
1542         em28xx_config_i2c(dev);
1543
1544         for (i = 0; i < TVNORMS; i++)
1545                 if (em28xx_boards[dev->model].norm == tvnorms[i].mode)
1546                         break;
1547         if (i == TVNORMS)
1548                 i = 0;
1549
1550         dev->tvnorm = &tvnorms[i];      /* set default norm */
1551
1552         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1553
1554         maxw = norm_maxw(dev);
1555         maxh = norm_maxh(dev);
1556
1557         /* set default image size */
1558         dev->width = maxw;
1559         dev->height = maxh;
1560         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1561         dev->field_size = dev->width * dev->height;
1562         dev->frame_size =
1563             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1564         dev->bytesperline = dev->width * 2;
1565         dev->hscale = 0;
1566         dev->vscale = 0;
1567         dev->ctl_input = 2;
1568
1569         errCode = em28xx_config(dev);
1570
1571         /* allocate and fill v4l2 device struct */
1572         dev->vdev = video_device_alloc();
1573         if (NULL == dev->vdev) {
1574                 em28xx_errdev("cannot allocate video_device.\n");
1575                 em28xx_devused&=~(1<<dev->devno);
1576                 kfree(dev);
1577                 return -ENOMEM;
1578         }
1579
1580         dev->vbi_dev = video_device_alloc();
1581         if (NULL == dev->vbi_dev) {
1582                 em28xx_errdev("cannot allocate video_device.\n");
1583                 kfree(dev->vdev);
1584                 em28xx_devused&=~(1<<dev->devno);
1585                 kfree(dev);
1586                 return -ENOMEM;
1587         }
1588
1589         /* Fills VBI device info */
1590         dev->vbi_dev->type = VFL_TYPE_VBI;
1591         dev->vbi_dev->fops = &em28xx_v4l_fops;
1592         dev->vbi_dev->minor = -1;
1593         dev->vbi_dev->dev = &dev->udev->dev;
1594         dev->vbi_dev->release = video_device_release;
1595         snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1596                                                          "em28xx",dev->devno,"vbi");
1597
1598         /* Fills CAPTURE device info */
1599         dev->vdev->type = VID_TYPE_CAPTURE;
1600         if (dev->has_tuner)
1601                 dev->vdev->type |= VID_TYPE_TUNER;
1602         dev->vdev->fops = &em28xx_v4l_fops;
1603         dev->vdev->minor = -1;
1604         dev->vdev->dev = &dev->udev->dev;
1605         dev->vdev->release = video_device_release;
1606         snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1607                                                          "em28xx",dev->devno,"video");
1608
1609         list_add_tail(&dev->devlist,&em28xx_devlist);
1610
1611
1612         if (dev->has_msp34xx) {
1613                 /* Send a reset to other chips via gpio */
1614                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1615                 msleep(3);
1616                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1617                 msleep(3);
1618
1619         }
1620         video_mux(dev, 0);
1621
1622         /* register v4l2 device */
1623         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1624                                          video_nr[dev->devno]))) {
1625                 em28xx_errdev("unable to register video device (error=%i).\n",
1626                               retval);
1627                 mutex_unlock(&dev->lock);
1628                 list_del(&dev->devlist);
1629                 video_device_release(dev->vdev);
1630                 em28xx_devused&=~(1<<dev->devno);
1631                 kfree(dev);
1632                 return -ENODEV;
1633         }
1634
1635         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1636                                         vbi_nr[dev->devno]) < 0) {
1637                 printk("unable to register vbi device\n");
1638                 mutex_unlock(&dev->lock);
1639                 list_del(&dev->devlist);
1640                 video_device_release(dev->vbi_dev);
1641                 video_device_release(dev->vdev);
1642                 em28xx_devused&=~(1<<dev->devno);
1643                 kfree(dev);
1644                 return -ENODEV;
1645         } else {
1646                 printk("registered VBI\n");
1647         }
1648
1649         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1650                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1651                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1652
1653         return 0;
1654 }
1655
1656 /*
1657  * em28xx_usb_probe()
1658  * checks for supported devices
1659  */
1660 static int em28xx_usb_probe(struct usb_interface *interface,
1661                             const struct usb_device_id *id)
1662 {
1663         const struct usb_endpoint_descriptor *endpoint;
1664         struct usb_device *udev;
1665         struct usb_interface *uif;
1666         struct em28xx *dev = NULL;
1667         int retval = -ENODEV;
1668         int i, nr, ifnum;
1669
1670         udev = usb_get_dev(interface_to_usbdev(interface));
1671         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1672
1673         /* Check to see next free device and mark as used */
1674         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1675         em28xx_devused|=1<<nr;
1676
1677         /* Don't register audio interfaces */
1678         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1679                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1680                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1681                                 ifnum,
1682                                 interface->altsetting[0].desc.bInterfaceClass);
1683
1684                 em28xx_devused&=~(1<<nr);
1685                 return -ENODEV;
1686         }
1687
1688         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1689                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1690                         ifnum,
1691                         interface->altsetting[0].desc.bInterfaceClass);
1692
1693         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1694
1695         /* check if the device has the iso in endpoint at the correct place */
1696         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1697             USB_ENDPOINT_XFER_ISOC) {
1698                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1699                 em28xx_devused&=~(1<<nr);
1700                 return -ENODEV;
1701         }
1702         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1703                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1704                 em28xx_devused&=~(1<<nr);
1705                 return -ENODEV;
1706         }
1707
1708         if (nr >= EM28XX_MAXBOARDS) {
1709                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1710                 em28xx_devused&=~(1<<nr);
1711                 return -ENOMEM;
1712         }
1713
1714         /* allocate memory for our device state and initialize it */
1715         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1716         if (dev == NULL) {
1717                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1718                 em28xx_devused&=~(1<<nr);
1719                 return -ENOMEM;
1720         }
1721
1722         snprintf(dev->name, 29, "em28xx #%d", nr);
1723         dev->devno = nr;
1724         dev->model = id->driver_info;
1725
1726         /* compute alternate max packet sizes */
1727         uif = udev->actconfig->interface[0];
1728
1729         dev->num_alt=uif->num_altsetting;
1730         em28xx_info("Alternate settings: %i\n",dev->num_alt);
1731 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1732         dev->alt_max_pkt_size = kmalloc(32*
1733                                                 dev->num_alt,GFP_KERNEL);
1734         if (dev->alt_max_pkt_size == NULL) {
1735                 em28xx_errdev("out of memory!\n");
1736                 em28xx_devused&=~(1<<nr);
1737                 kfree(dev);
1738                 return -ENOMEM;
1739         }
1740
1741         for (i = 0; i < dev->num_alt ; i++) {
1742                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1743                                                         wMaxPacketSize);
1744                 dev->alt_max_pkt_size[i] =
1745                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1746                 em28xx_info("Alternate setting %i, max size= %i\n",i,
1747                                                         dev->alt_max_pkt_size[i]);
1748         }
1749
1750         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1751                 dev->model = card[nr];
1752
1753         /* allocate device struct */
1754         retval = em28xx_init_dev(&dev, udev, nr);
1755         if (retval)
1756                 return retval;
1757
1758         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
1759
1760         /* save our data pointer in this interface device */
1761         usb_set_intfdata(interface, dev);
1762         return 0;
1763 }
1764
1765 /*
1766  * em28xx_usb_disconnect()
1767  * called when the device gets diconencted
1768  * video device will be unregistered on v4l2_close in case it is still open
1769  */
1770 static void em28xx_usb_disconnect(struct usb_interface *interface)
1771 {
1772         struct em28xx *dev;
1773
1774         dev = usb_get_intfdata(interface);
1775         usb_set_intfdata(interface, NULL);
1776
1777         if (!dev)
1778                 return;
1779
1780         em28xx_info("disconnecting %s\n", dev->vdev->name);
1781
1782         /* wait until all current v4l2 io is finished then deallocate resources */
1783         mutex_lock(&dev->lock);
1784
1785         wake_up_interruptible_all(&dev->open);
1786
1787         if (dev->users) {
1788                 em28xx_warn
1789                     ("device /dev/video%d is open! Deregistration and memory "
1790                      "deallocation are deferred on close.\n",
1791                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1792
1793                 dev->state |= DEV_MISCONFIGURED;
1794                 em28xx_uninit_isoc(dev);
1795                 dev->state |= DEV_DISCONNECTED;
1796                 wake_up_interruptible(&dev->wait_frame);
1797                 wake_up_interruptible(&dev->wait_stream);
1798         } else {
1799                 dev->state |= DEV_DISCONNECTED;
1800                 em28xx_release_resources(dev);
1801         }
1802
1803
1804         mutex_unlock(&dev->lock);
1805
1806         if (!dev->users) {
1807                 kfree(dev->alt_max_pkt_size);
1808                 kfree(dev);
1809         }
1810
1811 }
1812
1813 static struct usb_driver em28xx_usb_driver = {
1814         .name = "em28xx",
1815         .probe = em28xx_usb_probe,
1816         .disconnect = em28xx_usb_disconnect,
1817         .id_table = em28xx_id_table,
1818 };
1819
1820 static int __init em28xx_module_init(void)
1821 {
1822         int result;
1823
1824         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1825                (EM28XX_VERSION_CODE >> 16) & 0xff,
1826                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1827 #ifdef SNAPSHOT
1828         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1829                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1830 #endif
1831
1832         /* register this driver with the USB subsystem */
1833         result = usb_register(&em28xx_usb_driver);
1834         if (result)
1835                 em28xx_err(DRIVER_NAME
1836                            " usb_register failed. Error number %d.\n", result);
1837
1838         return result;
1839 }
1840
1841 static void __exit em28xx_module_exit(void)
1842 {
1843         /* deregister this driver with the USB subsystem */
1844         usb_deregister(&em28xx_usb_driver);
1845 }
1846
1847 module_init(em28xx_module_init);
1848 module_exit(em28xx_module_exit);