err.no Git - linux-2.6/blob - 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         struct em28xx_fh *fh;
 238
 239         list_for_each_entry(h, &em28xx_devlist, devlist) {
 240                 if (h->vdev->minor == minor) {
 241                         dev  = h;
 242                         dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 243                 }
 244                 if (h->vbi_dev->minor == minor) {
 245                         dev  = h;
 246                         dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 247                 }
 248         }
 249         if (NULL == dev)
 250                 return -ENODEV;
 251
 252         em28xx_videodbg("open minor=%d type=%s users=%d\n",
 253                                 minor,v4l2_type_names[dev->type],dev->users);
 254
 255         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
 256
 257         if (!fh) {
 258                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
 259                 return -ENOMEM;
 260         }
 261         mutex_lock(&dev->lock);
 262         fh->dev = dev;
 263         filp->private_data = fh;
 264
 265         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
 266                 em28xx_set_alternate(dev);
 267
 268                 dev->width = norm_maxw(dev);
 269                 dev->height = norm_maxh(dev);
 270                 dev->frame_size = dev->width * dev->height * 2;
 271                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 272                 dev->bytesperline = dev->width * 2;
 273                 dev->hscale = 0;
 274                 dev->vscale = 0;
 275
 276                 em28xx_capture_start(dev, 1);
 277                 em28xx_resolution_set(dev);
 278
 279
 280                 /* start the transfer */
 281                 errCode = em28xx_init_isoc(dev);
 282                 if (errCode)
 283                         goto err;
 284
 285                 em28xx_empty_framequeues(dev);
 286         }
 287
 288         dev->users++;
 289
 290 err:
 291         mutex_unlock(&dev->lock);
 292         return errCode;
 293 }
 294
 295 /*
 296  * em28xx_realease_resources()
 297  * unregisters the v4l2,i2c and usb devices
 298  * called when the device gets disconected or at module unload
 299 */
 300 static void em28xx_release_resources(struct em28xx *dev)
 301 {
 302
 303         /*FIXME: I2C IR should be disconnected */
 304
 305         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
 306                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
 307                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
 308         list_del(&dev->devlist);
 309         video_unregister_device(dev->vdev);
 310         video_unregister_device(dev->vbi_dev);
 311         em28xx_i2c_unregister(dev);
 312         usb_put_dev(dev->udev);
 313
 314
 315         /* Mark device as unused */
 316         em28xx_devused&=~(1<<dev->devno);
 317 }
 318
 319 /*
 320  * em28xx_v4l2_close()
 321  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 322  */
 323 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 324 {
 325         struct em28xx_fh *fh  = filp->private_data;
 326         struct em28xx    *dev = fh->dev;
 327         int              errCode;
 328
 329         em28xx_videodbg("users=%d\n", dev->users);
 330
 331         mutex_lock(&dev->lock);
 332         if (fh->reader == 1)
 333                fh->reader = 0;
 334
 335         if (dev->users == 1) {
 336                 dev->reader = 0;
 337
 338                 em28xx_uninit_isoc(dev);
 339                 em28xx_release_buffers(dev);
 340
 341                 /* the device is already disconnect,
 342                    free the remaining resources */
 343                 if (dev->state & DEV_DISCONNECTED) {
 344                         em28xx_release_resources(dev);
 345                         mutex_unlock(&dev->lock);
 346                         kfree(dev);
 347                         return 0;
 348                 }
 349
 350                 /* set alternate 0 */
 351                 dev->alt = 0;
 352                 em28xx_videodbg("setting alternate 0\n");
 353                 errCode = usb_set_interface(dev->udev, 0, 0);
 354                 if (errCode < 0) {
 355                         em28xx_errdev("cannot change alternate number to "
 356                                         "0 (error=%i)\n", errCode);
 357                 }
 358         }
 359         kfree(fh);
 360         dev->users--;
 361         wake_up_interruptible_nr(&dev->open, 1);
 362         mutex_unlock(&dev->lock);
 363         return 0;
 364 }
 365
 366 /*
 367  * em28xx_v4l2_read()
 368  * will allocate buffers when called for the first time
 369  */
 370 static ssize_t
 371 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 372                  loff_t * f_pos)
 373 {
 374         struct em28xx_frame_t *f, *i;
 375         unsigned long lock_flags;
 376         int ret = 0;
 377         struct em28xx_fh *fh = filp->private_data;
 378         struct em28xx *dev = fh->dev;
 379
 380         mutex_lock(&dev->lock);
 381
 382         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 383                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
 384
 385         if (dev->reader > 0 && fh->reader == 0) {
 386                 mutex_unlock(&dev->lock);
 387                 return -EBUSY;
 388         }
 389
 390         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 391                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
 392                 em28xx_videodbg("not supported yet! ...\n");
 393                 if (copy_to_user(buf, "", 1)) {
 394                         mutex_unlock(&dev->lock);
 395                         return -EFAULT;
 396                 }
 397                 mutex_unlock(&dev->lock);
 398                 return (1);
 399         }
 400         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 401                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
 402                 em28xx_videodbg("not supported yet! ...\n");
 403                 if (copy_to_user(buf, "", 1)) {
 404                         mutex_unlock(&dev->lock);
 405                         return -EFAULT;
 406                 }
 407                 mutex_unlock(&dev->lock);
 408                 return (1);
 409         }
 410
 411         if (dev->state & DEV_DISCONNECTED) {
 412                 em28xx_videodbg("device not present\n");
 413                 mutex_unlock(&dev->lock);
 414                 return -ENODEV;
 415         }
 416
 417         if (dev->state & DEV_MISCONFIGURED) {
 418                 em28xx_videodbg("device misconfigured; close and open it again\n");
 419                 mutex_unlock(&dev->lock);
 420                 return -EIO;
 421         }
 422
 423         if (dev->io == IO_MMAP) {
 424                 em28xx_videodbg ("IO method is set to mmap; close and open"
 425                                 " the device again to choose the read method\n");
 426                 mutex_unlock(&dev->lock);
 427                 return -EINVAL;
 428         } else {
 429                 dev->reader = 1;
 430                 fh->reader = 1;
 431         }
 432
 433         if (dev->io == IO_NONE) {
 434                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 435                         em28xx_errdev("read failed, not enough memory\n");
 436                         mutex_unlock(&dev->lock);
 437                         return -ENOMEM;
 438                 }
 439                 dev->io = IO_READ;
 440                 dev->stream = STREAM_ON;
 441                 em28xx_queue_unusedframes(dev);
 442         }
 443
 444         if (!count) {
 445                 mutex_unlock(&dev->lock);
 446                 return 0;
 447         }
 448
 449         if (list_empty(&dev->outqueue)) {
 450                 if (filp->f_flags & O_NONBLOCK) {
 451                         mutex_unlock(&dev->lock);
 452                         return -EAGAIN;
 453                 }
 454                 ret = wait_event_interruptible
 455                     (dev->wait_frame,
 456                      (!list_empty(&dev->outqueue)) ||
 457                      (dev->state & DEV_DISCONNECTED));
 458                 if (ret) {
 459                         mutex_unlock(&dev->lock);
 460                         return ret;
 461                 }
 462                 if (dev->state & DEV_DISCONNECTED) {
 463                         mutex_unlock(&dev->lock);
 464                         return -ENODEV;
 465                 }
 466         }
 467
 468         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 469
 470         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 471         list_for_each_entry(i, &dev->outqueue, frame)
 472             i->state = F_UNUSED;
 473         INIT_LIST_HEAD(&dev->outqueue);
 474         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 475
 476         em28xx_queue_unusedframes(dev);
 477
 478         if (count > f->buf.length)
 479                 count = f->buf.length;
 480
 481         if (copy_to_user(buf, f->bufmem, count)) {
 482                 mutex_unlock(&dev->lock);
 483                 return -EFAULT;
 484         }
 485         *f_pos += count;
 486
 487         mutex_unlock(&dev->lock);
 488
 489         return count;
 490 }
 491
 492 /*
 493  * em28xx_v4l2_poll()
 494  * will allocate buffers when called for the first time
 495  */
 496 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 497 {
 498         unsigned int mask = 0;
 499         struct em28xx_fh *fh = filp->private_data;
 500         struct em28xx *dev = fh->dev;
 501
 502         mutex_lock(&dev->lock);
 503
 504         if (dev->state & DEV_DISCONNECTED) {
 505                 em28xx_videodbg("device not present\n");
 506         } else if (dev->state & DEV_MISCONFIGURED) {
 507                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 508         } else {
 509                 if (dev->io == IO_NONE) {
 510                         if (!em28xx_request_buffers
 511                             (dev, EM28XX_NUM_READ_FRAMES)) {
 512                                 em28xx_warn
 513                                     ("poll() failed, not enough memory\n");
 514                         } else {
 515                                 dev->io = IO_READ;
 516                                 dev->stream = STREAM_ON;
 517                         }
 518                 }
 519
 520                 if (dev->io == IO_READ) {
 521                         em28xx_queue_unusedframes(dev);
 522                         poll_wait(filp, &dev->wait_frame, wait);
 523
 524                         if (!list_empty(&dev->outqueue))
 525                                 mask |= POLLIN | POLLRDNORM;
 526
 527                         mutex_unlock(&dev->lock);
 528
 529                         return mask;
 530                 }
 531         }
 532
 533         mutex_unlock(&dev->lock);
 534         return POLLERR;
 535 }
 536
 537 /*
 538  * em28xx_vm_open()
 539  */
 540 static void em28xx_vm_open(struct vm_area_struct *vma)
 541 {
 542         struct em28xx_frame_t *f = vma->vm_private_data;
 543         f->vma_use_count++;
 544 }
 545
 546 /*
 547  * em28xx_vm_close()
 548  */
 549 static void em28xx_vm_close(struct vm_area_struct *vma)
 550 {
 551         /* NOTE: buffers are not freed here */
 552         struct em28xx_frame_t *f = vma->vm_private_data;
 553
 554         if (f->vma_use_count)
 555                 f->vma_use_count--;
 556 }
 557
 558 static struct vm_operations_struct em28xx_vm_ops = {
 559         .open = em28xx_vm_open,
 560         .close = em28xx_vm_close,
 561 };
 562
 563 /*
 564  * em28xx_v4l2_mmap()
 565  */
 566 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 567 {
 568         struct em28xx_fh *fh    = filp->private_data;
 569         struct em28xx    *dev   = fh->dev;
 570         unsigned long    size   = vma->vm_end - vma->vm_start;
 571         unsigned long    start  = vma->vm_start;
 572         void             *pos;
 573         u32              i;
 574
 575         mutex_lock(&dev->lock);
 576
 577         if (dev->reader > 0 && fh->reader == 0) {
 578                 mutex_unlock(&dev->lock);
 579                 return -EBUSY;
 580         } else {
 581                 dev->reader = 1;
 582                 fh->reader = 1;
 583         }
 584
 585         if (dev->state & DEV_DISCONNECTED) {
 586                 em28xx_videodbg("mmap: device not present\n");
 587                 mutex_unlock(&dev->lock);
 588                 return -ENODEV;
 589         }
 590
 591         if (dev->state & DEV_MISCONFIGURED) {
 592                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 593                                                 "open it again\n");
 594                 mutex_unlock(&dev->lock);
 595                 return -EIO;
 596         }
 597
 598         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 599             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 600                 mutex_unlock(&dev->lock);
 601                 return -EINVAL;
 602         }
 603
 604         for (i = 0; i < dev->num_frames; i++) {
 605                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 606                         break;
 607         }
 608         if (i == dev->num_frames) {
 609                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 610                 mutex_unlock(&dev->lock);
 611                 return -EINVAL;
 612         }
 613
 614         /* VM_IO is eventually going to replace PageReserved altogether */
 615         vma->vm_flags |= VM_IO;
 616         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 617
 618         pos = dev->frame[i].bufmem;
 619         while (size > 0) {      /* size is page-aligned */
 620                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 621                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 622                         mutex_unlock(&dev->lock);
 623                         return -EAGAIN;
 624                 }
 625                 start += PAGE_SIZE;
 626                 pos += PAGE_SIZE;
 627                 size -= PAGE_SIZE;
 628         }
 629
 630         vma->vm_ops = &em28xx_vm_ops;
 631         vma->vm_private_data = &dev->frame[i];
 632
 633         em28xx_vm_open(vma);
 634         mutex_unlock(&dev->lock);
 635         return 0;
 636 }
 637
 638 /*
 639  * em28xx_get_ctrl()
 640  * return the current saturation, brightness or contrast, mute state
 641  */
 642 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 643 {
 644         switch (ctrl->id) {
 645         case V4L2_CID_AUDIO_MUTE:
 646                 ctrl->value = dev->mute;
 647                 return 0;
 648         case V4L2_CID_AUDIO_VOLUME:
 649                 ctrl->value = dev->volume;
 650                 return 0;
 651         default:
 652                 return -EINVAL;
 653         }
 654 }
 655
 656 /*
 657  * em28xx_set_ctrl()
 658  * mute or set new saturation, brightness or contrast
 659  */
 660 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 661 {
 662         switch (ctrl->id) {
 663         case V4L2_CID_AUDIO_MUTE:
 664                 if (ctrl->value != dev->mute) {
 665                         dev->mute = ctrl->value;
 666                         em28xx_audio_usb_mute(dev, ctrl->value);
 667                         return em28xx_audio_analog_set(dev);
 668                 }
 669                 return 0;
 670         case V4L2_CID_AUDIO_VOLUME:
 671                 dev->volume = ctrl->value;
 672                 return em28xx_audio_analog_set(dev);
 673         default:
 674                 return -EINVAL;
 675         }
 676 }
 677
 678 /*
 679  * em28xx_stream_interrupt()
 680  * stops streaming
 681  */
 682 static int em28xx_stream_interrupt(struct em28xx *dev)
 683 {
 684         int ret = 0;
 685
 686         /* stop reading from the device */
 687
 688         dev->stream = STREAM_INTERRUPT;
 689         ret = wait_event_timeout(dev->wait_stream,
 690                                  (dev->stream == STREAM_OFF) ||
 691                                  (dev->state & DEV_DISCONNECTED),
 692                                  EM28XX_URB_TIMEOUT);
 693         if (dev->state & DEV_DISCONNECTED)
 694                 return -ENODEV;
 695         else if (ret) {
 696                 dev->state |= DEV_MISCONFIGURED;
 697                 em28xx_videodbg("device is misconfigured; close and "
 698                         "open /dev/video%d again\n",
 699                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
 700                 return ret;
 701         }
 702
 703         return 0;
 704 }
 705
 706 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 707 {
 708         unsigned int hscale, vscale;
 709         unsigned int maxh, maxw;
 710
 711         maxw = norm_maxw(dev);
 712         maxh = norm_maxh(dev);
 713
 714         /* width must even because of the YUYV format */
 715         /* height must be even because of interlacing */
 716         height &= 0xfffe;
 717         width &= 0xfffe;
 718
 719         if (height < 32)
 720                 height = 32;
 721         if (height > maxh)
 722                 height = maxh;
 723         if (width < 48)
 724                 width = 48;
 725         if (width > maxw)
 726                 width = maxw;
 727
 728         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 729                 hscale = 0x3fff;
 730         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 731
 732         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 733                 vscale = 0x3fff;
 734         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 735
 736         /* set new image size */
 737         dev->width = width;
 738         dev->height = height;
 739         dev->frame_size = dev->width * dev->height * 2;
 740         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 741         dev->bytesperline = dev->width * 2;
 742         dev->hscale = hscale;
 743         dev->vscale = vscale;
 744
 745         em28xx_resolution_set(dev);
 746
 747         return 0;
 748 }
 749
 750 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
 751 {
 752         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
 753                 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 754                 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 755                 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
 756                 "V4L2_BUF_TYPE_VBI_CAPTURE" :
 757                 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
 758                 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
 759                 "not supported");
 760
 761         switch (format->type) {
 762         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 763         {
 764                 format->fmt.pix.width = dev->width;
 765                 format->fmt.pix.height = dev->height;
 766                 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 767                 format->fmt.pix.bytesperline = dev->bytesperline;
 768                 format->fmt.pix.sizeimage = dev->frame_size;
 769                 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 770                 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 771
 772                 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
 773                         dev->height);
 774                 break;
 775         }
 776
 777         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 778         {
 779                 format->fmt.sliced.service_set=0;
 780
 781                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 782
 783                 if (format->fmt.sliced.service_set==0)
 784                         return -EINVAL;
 785
 786                 break;
 787         }
 788
 789         default:
 790                 return -EINVAL;
 791         }
 792         return (0);
 793 }
 794
 795 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
 796 {
 797         u32 i;
 798         int ret = 0;
 799         int width = format->fmt.pix.width;
 800         int height = format->fmt.pix.height;
 801         unsigned int hscale, vscale;
 802         unsigned int maxh, maxw;
 803
 804         maxw = norm_maxw(dev);
 805         maxh = norm_maxh(dev);
 806
 807         em28xx_videodbg("%s: type=%s\n",
 808                         cmd == VIDIOC_TRY_FMT ?
 809                         "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 810                         format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
 811                         "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 812                         format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
 813                         "V4L2_BUF_TYPE_VBI_CAPTURE " :
 814                         "not supported");
 815
 816         if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 817                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 818
 819                 if (format->fmt.sliced.service_set==0)
 820                         return -EINVAL;
 821
 822                 return 0;
 823         }
 824
 825
 826         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 827                 return -EINVAL;
 828
 829         em28xx_videodbg("%s: requested %dx%d\n",
 830                 cmd == VIDIOC_TRY_FMT ?
 831                 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 832                 format->fmt.pix.width, format->fmt.pix.height);
 833
 834         /* FIXME: Move some code away from here */
 835         /* width must even because of the YUYV format */
 836         /* height must be even because of interlacing */
 837         height &= 0xfffe;
 838         width &= 0xfffe;
 839
 840         if (height < 32)
 841                 height = 32;
 842         if (height > maxh)
 843                 height = maxh;
 844         if (width < 48)
 845                 width = 48;
 846         if (width > maxw)
 847                 width = maxw;
 848
 849         if(dev->is_em2800){
 850                 /* the em2800 can only scale down to 50% */
 851                 if(height % (maxh / 2))
 852                         height=maxh;
 853                 if(width % (maxw / 2))
 854                         width=maxw;
 855                 /* according to empiatech support */
 856                 /* the MaxPacketSize is to small to support */
 857                 /* framesizes larger than 640x480 @ 30 fps */
 858                 /* or 640x576 @ 25 fps. As this would cut */
 859                 /* of a part of the image we prefer */
 860                 /* 360x576 or 360x480 for now */
 861                 if(width == maxw && height == maxh)
 862                         width /= 2;
 863         }
 864
 865         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 866                 hscale = 0x3fff;
 867
 868         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 869
 870         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 871                 vscale = 0x3fff;
 872
 873         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 874
 875         format->fmt.pix.width = width;
 876         format->fmt.pix.height = height;
 877         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 878         format->fmt.pix.bytesperline = width * 2;
 879         format->fmt.pix.sizeimage = width * 2 * height;
 880         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 881         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
 882
 883         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
 884                 cmd == VIDIOC_TRY_FMT ?
 885                 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
 886                 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
 887
 888         if (cmd == VIDIOC_TRY_FMT)
 889                 return 0;
 890
 891         for (i = 0; i < dev->num_frames; i++)
 892                 if (dev->frame[i].vma_use_count) {
 893                         em28xx_videodbg("VIDIOC_S_FMT failed. "
 894                                 "Unmap the buffers first.\n");
 895                         return -EINVAL;
 896                 }
 897
 898         /* stop io in case it is already in progress */
 899         if (dev->stream == STREAM_ON) {
 900                 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
 901                 if ((ret = em28xx_stream_interrupt(dev)))
 902                         return ret;
 903         }
 904
 905         em28xx_release_buffers(dev);
 906         dev->io = IO_NONE;
 907
 908         /* set new image size */
 909         dev->width = width;
 910         dev->height = height;
 911         dev->frame_size = dev->width * dev->height * 2;
 912         dev->field_size = dev->frame_size >> 1;
 913         dev->bytesperline = dev->width * 2;
 914         dev->hscale = hscale;
 915         dev->vscale = vscale;
 916         em28xx_uninit_isoc(dev);
 917         em28xx_set_alternate(dev);
 918         em28xx_capture_start(dev, 1);
 919         em28xx_resolution_set(dev);
 920         em28xx_init_isoc(dev);
 921
 922         return 0;
 923 }
 924
 925 /*
 926  * em28xx_v4l2_do_ioctl()
 927  * This function is _not_ called directly, but from
 928  * em28xx_v4l2_ioctl. Userspace
 929  * copying is done already, arg is a kernel pointer.
 930  */
 931 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 932                            struct em28xx *dev, unsigned int cmd, void *arg,
 933                            v4l2_kioctl driver_ioctl)
 934 {
 935         struct em28xx_fh *fh = filp->private_data;
 936         int ret;
 937
 938         switch (cmd) {
 939                 /* ---------- tv norms ---------- */
 940         case VIDIOC_ENUMSTD:
 941         {
 942                 struct v4l2_standard *e = arg;
 943                 unsigned int i;
 944
 945                 i = e->index;
 946                 if (i >= TVNORMS)
 947                         return -EINVAL;
 948                 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 949                                                 tvnorms[e->index].name);
 950                 e->index = i;
 951                 if (ret < 0)
 952                         return ret;
 953                 return 0;
 954         }
 955         case VIDIOC_G_STD:
 956         {
 957                 v4l2_std_id *id = arg;
 958
 959                 *id = dev->tvnorm->id;
 960                 return 0;
 961         }
 962         case VIDIOC_S_STD:
 963         {
 964                 v4l2_std_id *id = arg;
 965                 unsigned int i;
 966
 967                 for (i = 0; i < TVNORMS; i++)
 968                         if (*id == tvnorms[i].id)
 969                                 break;
 970                 if (i == TVNORMS)
 971                         for (i = 0; i < TVNORMS; i++)
 972                                 if (*id & tvnorms[i].id)
 973                                         break;
 974                 if (i == TVNORMS)
 975                         return -EINVAL;
 976
 977                 mutex_lock(&dev->lock);
 978                 dev->tvnorm = &tvnorms[i];
 979
 980                 em28xx_set_norm(dev, dev->width, dev->height);
 981
 982                 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 983                                         &dev->tvnorm->id);
 984
 985                 mutex_unlock(&dev->lock);
 986
 987                 return 0;
 988         }
 989
 990         /* ------ input switching ---------- */
 991         case VIDIOC_ENUMINPUT:
 992         {
 993                 struct v4l2_input *i = arg;
 994                 unsigned int n;
 995                 static const char *iname[] = {
 996                         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 997                         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 998                         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 999                         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1000                         [EM28XX_VMUX_SVIDEO] = "S-Video",
1001                         [EM28XX_VMUX_TELEVISION] = "Television",
1002                         [EM28XX_VMUX_CABLE] = "Cable TV",
1003                         [EM28XX_VMUX_DVB] = "DVB",
1004                         [EM28XX_VMUX_DEBUG] = "for debug only",
1005                 };
1006
1007                 n = i->index;
1008                 if (n >= MAX_EM28XX_INPUT)
1009                         return -EINVAL;
1010                 if (0 == INPUT(n)->type)
1011                         return -EINVAL;
1012                 memset(i, 0, sizeof(*i));
1013                 i->index = n;
1014                 i->type = V4L2_INPUT_TYPE_CAMERA;
1015                 strcpy(i->name, iname[INPUT(n)->type]);
1016                 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1017                         (EM28XX_VMUX_CABLE == INPUT(n)->type))
1018                         i->type = V4L2_INPUT_TYPE_TUNER;
1019                 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1020                         i->std |= tvnorms[n].id;
1021                 return 0;
1022         }
1023         case VIDIOC_G_INPUT:
1024         {
1025                 int *i = arg;
1026                 *i = dev->ctl_input;
1027
1028                 return 0;
1029         }
1030         case VIDIOC_S_INPUT:
1031         {
1032                 int *index = arg;
1033
1034                 if (*index >= MAX_EM28XX_INPUT)
1035                         return -EINVAL;
1036                 if (0 == INPUT(*index)->type)
1037                         return -EINVAL;
1038
1039                 mutex_lock(&dev->lock);
1040                 video_mux(dev, *index);
1041                 mutex_unlock(&dev->lock);
1042
1043                 return 0;
1044         }
1045         case VIDIOC_G_AUDIO:
1046         {
1047                 struct v4l2_audio *a = arg;
1048                 unsigned int index = a->index;
1049
1050                 if (a->index > 1)
1051                         return -EINVAL;
1052                 memset(a, 0, sizeof(*a));
1053                 index = dev->ctl_ainput;
1054
1055                 if (index == 0) {
1056                         strcpy(a->name, "Television");
1057                 } else {
1058                         strcpy(a->name, "Line In");
1059                 }
1060                 a->capability = V4L2_AUDCAP_STEREO;
1061                 a->index = index;
1062                 return 0;
1063         }
1064         case VIDIOC_S_AUDIO:
1065         {
1066                 struct v4l2_audio *a = arg;
1067
1068                 if (a->index != dev->ctl_ainput)
1069                         return -EINVAL;
1070
1071                 return 0;
1072         }
1073
1074         /* --- controls ---------------------------------------------- */
1075         case VIDIOC_QUERYCTRL:
1076         {
1077                 struct v4l2_queryctrl *qc = arg;
1078                 int i, id=qc->id;
1079
1080                 memset(qc,0,sizeof(*qc));
1081                 qc->id=id;
1082
1083                 if (!dev->has_msp34xx) {
1084                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1085                                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1086                                         memcpy(qc, &(em28xx_qctrl[i]),
1087                                         sizeof(*qc));
1088                                         return 0;
1089                                 }
1090                         }
1091                 }
1092                 mutex_lock(&dev->lock);
1093                 em28xx_i2c_call_clients(dev,cmd,qc);
1094                 mutex_unlock(&dev->lock);
1095                 if (qc->type)
1096                         return 0;
1097                 else
1098                         return -EINVAL;
1099         }
1100         case VIDIOC_G_CTRL:
1101         {
1102                 struct v4l2_control *ctrl = arg;
1103                 int retval=-EINVAL;
1104
1105                 if (!dev->has_msp34xx)
1106                         retval=em28xx_get_ctrl(dev, ctrl);
1107                 if (retval==-EINVAL) {
1108                         mutex_lock(&dev->lock);
1109                         em28xx_i2c_call_clients(dev,cmd,arg);
1110                         mutex_unlock(&dev->lock);
1111                         return 0;
1112                 } else return retval;
1113         }
1114         case VIDIOC_S_CTRL:
1115         {
1116                 struct v4l2_control *ctrl = arg;
1117                 u8 i;
1118                 mutex_lock(&dev->lock);
1119
1120                 if (!dev->has_msp34xx){
1121                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1122                                 if (ctrl->id == em28xx_qctrl[i].id) {
1123                                         int retval=-EINVAL;
1124                                         if (ctrl->value <
1125                                         em28xx_qctrl[i].minimum
1126                                         || ctrl->value >
1127                                         em28xx_qctrl[i].maximum)
1128                                                 return -ERANGE;
1129                                         retval = em28xx_set_ctrl(dev, ctrl);
1130                                         mutex_unlock(&dev->lock);
1131                                         return retval;
1132                                 }
1133                         }
1134                 }
1135
1136                 em28xx_i2c_call_clients(dev,cmd,arg);
1137                 mutex_unlock(&dev->lock);
1138                 return 0;
1139         }
1140         /* --- tuner ioctls ------------------------------------------ */
1141         case VIDIOC_G_TUNER:
1142         {
1143                 struct v4l2_tuner *t = arg;
1144
1145                 if (0 != t->index)
1146                         return -EINVAL;
1147
1148                 memset(t, 0, sizeof(*t));
1149                 strcpy(t->name, "Tuner");
1150                 mutex_lock(&dev->lock);
1151                 /* let clients fill in the remainder of this struct */
1152                 em28xx_i2c_call_clients(dev, cmd, t);
1153                 mutex_unlock(&dev->lock);
1154                 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1155                                 t->afc);
1156                 return 0;
1157         }
1158         case VIDIOC_S_TUNER:
1159         {
1160                 struct v4l2_tuner *t = arg;
1161
1162                 if (0 != t->index)
1163                         return -EINVAL;
1164                 mutex_lock(&dev->lock);
1165                 /* let clients handle this */
1166                 em28xx_i2c_call_clients(dev, cmd, t);
1167                 mutex_unlock(&dev->lock);
1168                 return 0;
1169         }
1170         case VIDIOC_G_FREQUENCY:
1171         {
1172                 struct v4l2_frequency *f = arg;
1173
1174                 memset(f, 0, sizeof(*f));
1175                 f->type = V4L2_TUNER_ANALOG_TV;
1176                 f->frequency = dev->ctl_freq;
1177
1178                 return 0;
1179         }
1180         case VIDIOC_S_FREQUENCY:
1181         {
1182                 struct v4l2_frequency *f = arg;
1183
1184                 if (0 != f->tuner)
1185                         return -EINVAL;
1186
1187                 if (V4L2_TUNER_ANALOG_TV != f->type)
1188                         return -EINVAL;
1189
1190                 mutex_lock(&dev->lock);
1191                 dev->ctl_freq = f->frequency;
1192                 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1193                 mutex_unlock(&dev->lock);
1194                 return 0;
1195         }
1196         case VIDIOC_CROPCAP:
1197         {
1198                 struct v4l2_cropcap *cc = arg;
1199
1200                 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1201                         return -EINVAL;
1202                 cc->bounds.left = 0;
1203                 cc->bounds.top = 0;
1204                 cc->bounds.width = dev->width;
1205                 cc->bounds.height = dev->height;
1206                 cc->defrect = cc->bounds;
1207                 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1208                 cc->pixelaspect.denominator = 59;
1209                 return 0;
1210         }
1211         case VIDIOC_STREAMON:
1212         {
1213                 int *type = arg;
1214
1215                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1216                         || dev->io != IO_MMAP)
1217                         return -EINVAL;
1218
1219                 if (list_empty(&dev->inqueue))
1220                         return -EINVAL;
1221
1222                 dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1223
1224                 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1225
1226                 return 0;
1227         }
1228         case VIDIOC_STREAMOFF:
1229         {
1230                 int *type = arg;
1231                 int ret;
1232
1233                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1234                         || dev->io != IO_MMAP)
1235                         return -EINVAL;
1236
1237                 mutex_lock(&dev->lock);
1238                 if (dev->stream == STREAM_ON) {
1239                         em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1240                         if ((ret = em28xx_stream_interrupt(dev))){
1241                                 mutex_unlock(&dev->lock);
1242                                 return ret;
1243                         }
1244                 }
1245
1246                 fh->reader = 0;
1247                 em28xx_empty_framequeues(dev);
1248                 mutex_unlock(&dev->lock);
1249
1250                 return 0;
1251         }
1252         default:
1253                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1254                                                   driver_ioctl);
1255         }
1256         return 0;
1257 }
1258
1259 /*
1260  * em28xx_v4l2_do_ioctl()
1261  * This function is _not_ called directly, but from
1262  * em28xx_v4l2_ioctl. Userspace
1263  * copying is done already, arg is a kernel pointer.
1264  */
1265 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1266                                  unsigned int cmd, void *arg)
1267 {
1268         struct em28xx_fh *fh = filp->private_data;
1269         struct em28xx *dev   = fh->dev;
1270
1271         if (!dev)
1272                 return -ENODEV;
1273
1274         if (video_debug > 1)
1275                 v4l_print_ioctl(dev->name,cmd);
1276
1277         switch (cmd) {
1278
1279                 /* --- capabilities ------------------------------------------ */
1280         case VIDIOC_QUERYCAP:
1281                 {
1282                 struct v4l2_capability *cap = arg;
1283
1284                 memset(cap, 0, sizeof(*cap));
1285                 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1286                 strlcpy(cap->card, em28xx_boards[dev->model].name,
1287                         sizeof(cap->card));
1288                 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1289                         sizeof(cap->bus_info));
1290                 cap->version = EM28XX_VERSION_CODE;
1291                 cap->capabilities =
1292                                 V4L2_CAP_SLICED_VBI_CAPTURE |
1293                                 V4L2_CAP_VIDEO_CAPTURE |
1294                                 V4L2_CAP_AUDIO |
1295                                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1296                 if (dev->has_tuner)
1297                         cap->capabilities |= V4L2_CAP_TUNER;
1298                 return 0;
1299         }
1300         /* --- capture ioctls ---------------------------------------- */
1301         case VIDIOC_ENUM_FMT:
1302         {
1303                 struct v4l2_fmtdesc *fmtd = arg;
1304
1305                 if (fmtd->index != 0)
1306                         return -EINVAL;
1307                 memset(fmtd, 0, sizeof(*fmtd));
1308                 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1309                 strcpy(fmtd->description, "Packed YUY2");
1310                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1311                 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1312                 return 0;
1313         }
1314         case VIDIOC_G_FMT:
1315         {
1316                 int retval;
1317                 mutex_lock(&dev->lock);
1318                 retval = em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1319                 mutex_unlock(&dev->lock);
1320                 return retval;
1321
1322         }
1323         case VIDIOC_TRY_FMT:
1324         case VIDIOC_S_FMT:
1325         {
1326                 int retval;
1327                 mutex_lock(&dev->lock);
1328                 retval = em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1329                 mutex_unlock(&dev->lock);
1330                 return retval;
1331         }
1332
1333         case VIDIOC_REQBUFS:
1334         {
1335                 struct v4l2_requestbuffers *rb = arg;
1336                 u32 i;
1337                 int ret;
1338
1339                 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1340                         rb->memory != V4L2_MEMORY_MMAP)
1341                         return -EINVAL;
1342
1343                 if (dev->io == IO_READ) {
1344                         em28xx_videodbg ("method is set to read;"
1345                                 " close and open the device again to"
1346                                 " choose the mmap I/O method\n");
1347                         return -EINVAL;
1348                 }
1349
1350                 for (i = 0; i < dev->num_frames; i++)
1351                         if (dev->frame[i].vma_use_count) {
1352                                 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1353                                 return -EINVAL;
1354                         }
1355
1356                 mutex_lock(&dev->lock);
1357                 if (dev->stream == STREAM_ON) {
1358                         em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1359                         if ((ret = em28xx_stream_interrupt(dev))){
1360                                 mutex_unlock(&dev->lock);
1361                                 return ret;
1362                         }
1363                 }
1364
1365                 em28xx_empty_framequeues(dev);
1366
1367                 em28xx_release_buffers(dev);
1368                 if (rb->count)
1369                         rb->count =
1370                                 em28xx_request_buffers(dev, rb->count);
1371
1372                 dev->frame_current = NULL;
1373
1374                 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1375                                                 rb->count);
1376                 dev->io = rb->count ? IO_MMAP : IO_NONE;
1377                 mutex_unlock(&dev->lock);
1378                 return 0;
1379         }
1380         case VIDIOC_QUERYBUF:
1381         {
1382                 struct v4l2_buffer *b = arg;
1383
1384                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1385                         b->index >= dev->num_frames || dev->io != IO_MMAP)
1386                         return -EINVAL;
1387
1388                 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1389
1390                 if (dev->frame[b->index].vma_use_count) {
1391                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1392                 }
1393                 if (dev->frame[b->index].state == F_DONE)
1394                         b->flags |= V4L2_BUF_FLAG_DONE;
1395                 else if (dev->frame[b->index].state != F_UNUSED)
1396                         b->flags |= V4L2_BUF_FLAG_QUEUED;
1397                 return 0;
1398         }
1399         case VIDIOC_QBUF:
1400         {
1401                 struct v4l2_buffer *b = arg;
1402                 unsigned long lock_flags;
1403
1404                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1405                         b->index >= dev->num_frames || dev->io != IO_MMAP) {
1406                         return -EINVAL;
1407                 }
1408
1409                 if (dev->frame[b->index].state != F_UNUSED) {
1410                         return -EAGAIN;
1411                 }
1412                 dev->frame[b->index].state = F_QUEUED;
1413
1414                 /* add frame to fifo */
1415                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1416                 list_add_tail(&dev->frame[b->index].frame,
1417                                 &dev->inqueue);
1418                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1419
1420                 return 0;
1421         }
1422         case VIDIOC_DQBUF:
1423         {
1424                 struct v4l2_buffer *b = arg;
1425                 struct em28xx_frame_t *f;
1426                 unsigned long lock_flags;
1427                 int ret = 0;
1428
1429                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1430                         || dev->io != IO_MMAP)
1431                         return -EINVAL;
1432
1433                 if (list_empty(&dev->outqueue)) {
1434                         if (dev->stream == STREAM_OFF)
1435                                 return -EINVAL;
1436                         if (filp->f_flags & O_NONBLOCK)
1437                                 return -EAGAIN;
1438                         ret = wait_event_interruptible
1439                                 (dev->wait_frame,
1440                                 (!list_empty(&dev->outqueue)) ||
1441                                 (dev->state & DEV_DISCONNECTED));
1442                         if (ret)
1443                                 return ret;
1444                         if (dev->state & DEV_DISCONNECTED)
1445                                 return -ENODEV;
1446                 }
1447
1448                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1449                 f = list_entry(dev->outqueue.next,
1450                                 struct em28xx_frame_t, frame);
1451                 list_del(dev->outqueue.next);
1452                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1453
1454                 f->state = F_UNUSED;
1455                 memcpy(b, &f->buf, sizeof(*b));
1456
1457                 if (f->vma_use_count)
1458                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1459
1460                 return 0;
1461         }
1462         default:
1463                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1464                                        em28xx_video_do_ioctl);
1465         }
1466         return 0;
1467 }
1468
1469 /*
1470  * em28xx_v4l2_ioctl()
1471  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1472  */
1473 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1474                              unsigned int cmd, unsigned long arg)
1475 {
1476         int ret = 0;
1477         struct em28xx_fh *fh = filp->private_data;
1478         struct em28xx *dev   = fh->dev;
1479
1480         if (dev->state & DEV_DISCONNECTED) {
1481                 em28xx_errdev("v4l2 ioctl: device not present\n");
1482                 return -ENODEV;
1483         }
1484
1485         if (dev->state & DEV_MISCONFIGURED) {
1486                 em28xx_errdev
1487                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1488                 return -EIO;
1489         }
1490
1491         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1492
1493         return ret;
1494 }
1495
1496 static const struct file_operations em28xx_v4l_fops = {
1497         .owner = THIS_MODULE,
1498         .open = em28xx_v4l2_open,
1499         .release = em28xx_v4l2_close,
1500         .ioctl = em28xx_v4l2_ioctl,
1501         .read = em28xx_v4l2_read,
1502         .poll = em28xx_v4l2_poll,
1503         .mmap = em28xx_v4l2_mmap,
1504         .llseek = no_llseek,
1505         .compat_ioctl   = v4l_compat_ioctl32,
1506
1507 };
1508
1509 /******************************** usb interface *****************************************/
1510
1511 /*
1512  * em28xx_init_dev()
1513  * allocates and inits the device structs, registers i2c bus and v4l device
1514  */
1515 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1516                            int minor)
1517 {
1518         struct em28xx *dev = *devhandle;
1519         int retval = -ENOMEM;
1520         int errCode, i;
1521         unsigned int maxh, maxw;
1522
1523         dev->udev = udev;
1524         mutex_init(&dev->lock);
1525         spin_lock_init(&dev->queue_lock);
1526         init_waitqueue_head(&dev->open);
1527         init_waitqueue_head(&dev->wait_frame);
1528         init_waitqueue_head(&dev->wait_stream);
1529
1530         dev->em28xx_write_regs = em28xx_write_regs;
1531         dev->em28xx_read_reg = em28xx_read_reg;
1532         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1533         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1534         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1535         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1536
1537         /* setup video picture settings for saa7113h */
1538         memset(&dev->vpic, 0, sizeof(dev->vpic));
1539         dev->vpic.colour = 128 << 8;
1540         dev->vpic.hue = 128 << 8;
1541         dev->vpic.brightness = 128 << 8;
1542         dev->vpic.contrast = 192 << 8;
1543         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1544         dev->vpic.depth = 16;
1545         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1546
1547         em28xx_pre_card_setup(dev);
1548
1549         errCode = em28xx_config(dev);
1550         if (errCode) {
1551                 em28xx_errdev("error configuring device\n");
1552                 em28xx_devused &= ~(1<<dev->devno);
1553                 kfree(dev);
1554                 return -ENOMEM;
1555         }
1556
1557         /* register i2c bus */
1558         em28xx_i2c_register(dev);
1559
1560         /* Do board specific init and eeprom reading */
1561         em28xx_card_setup(dev);
1562
1563         /* configure the device */
1564         em28xx_config_i2c(dev);
1565
1566         for (i = 0; i < TVNORMS; i++)
1567                 if (em28xx_boards[dev->model].norm == tvnorms[i].mode)
1568                         break;
1569         if (i == TVNORMS)
1570                 i = 0;
1571
1572         dev->tvnorm = &tvnorms[i];      /* set default norm */
1573
1574         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1575
1576         maxw = norm_maxw(dev);
1577         maxh = norm_maxh(dev);
1578
1579         /* set default image size */
1580         dev->width = maxw;
1581         dev->height = maxh;
1582         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1583         dev->field_size = dev->width * dev->height;
1584         dev->frame_size =
1585             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1586         dev->bytesperline = dev->width * 2;
1587         dev->hscale = 0;
1588         dev->vscale = 0;
1589         dev->ctl_input = 2;
1590
1591         errCode = em28xx_config(dev);
1592
1593         /* allocate and fill v4l2 device struct */
1594         dev->vdev = video_device_alloc();
1595         if (NULL == dev->vdev) {
1596                 em28xx_errdev("cannot allocate video_device.\n");
1597                 em28xx_devused&=~(1<<dev->devno);
1598                 kfree(dev);
1599                 return -ENOMEM;
1600         }
1601
1602         dev->vbi_dev = video_device_alloc();
1603         if (NULL == dev->vbi_dev) {
1604                 em28xx_errdev("cannot allocate video_device.\n");
1605                 kfree(dev->vdev);
1606                 em28xx_devused&=~(1<<dev->devno);
1607                 kfree(dev);
1608                 return -ENOMEM;
1609         }
1610
1611         /* Fills VBI device info */
1612         dev->vbi_dev->type = VFL_TYPE_VBI;
1613         dev->vbi_dev->fops = &em28xx_v4l_fops;
1614         dev->vbi_dev->minor = -1;
1615         dev->vbi_dev->dev = &dev->udev->dev;
1616         dev->vbi_dev->release = video_device_release;
1617         snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1618                                                          "em28xx",dev->devno,"vbi");
1619
1620         /* Fills CAPTURE device info */
1621         dev->vdev->type = VID_TYPE_CAPTURE;
1622         if (dev->has_tuner)
1623                 dev->vdev->type |= VID_TYPE_TUNER;
1624         dev->vdev->fops = &em28xx_v4l_fops;
1625         dev->vdev->minor = -1;
1626         dev->vdev->dev = &dev->udev->dev;
1627         dev->vdev->release = video_device_release;
1628         snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1629                                                          "em28xx",dev->devno,"video");
1630
1631         list_add_tail(&dev->devlist,&em28xx_devlist);
1632
1633
1634         if (dev->has_msp34xx) {
1635                 /* Send a reset to other chips via gpio */
1636                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1637                 msleep(3);
1638                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1639                 msleep(3);
1640
1641         }
1642         video_mux(dev, 0);
1643
1644         /* register v4l2 device */
1645         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1646                                          video_nr[dev->devno]))) {
1647                 em28xx_errdev("unable to register video device (error=%i).\n",
1648                               retval);
1649                 mutex_unlock(&dev->lock);
1650                 list_del(&dev->devlist);
1651                 video_device_release(dev->vdev);
1652                 em28xx_devused&=~(1<<dev->devno);
1653                 kfree(dev);
1654                 return -ENODEV;
1655         }
1656
1657         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1658                                         vbi_nr[dev->devno]) < 0) {
1659                 printk("unable to register vbi device\n");
1660                 mutex_unlock(&dev->lock);
1661                 list_del(&dev->devlist);
1662                 video_device_release(dev->vbi_dev);
1663                 video_device_release(dev->vdev);
1664                 em28xx_devused&=~(1<<dev->devno);
1665                 kfree(dev);
1666                 return -ENODEV;
1667         } else {
1668                 printk("registered VBI\n");
1669         }
1670
1671         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1672                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1673                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1674
1675         return 0;
1676 }
1677
1678 /*
1679  * em28xx_usb_probe()
1680  * checks for supported devices
1681  */
1682 static int em28xx_usb_probe(struct usb_interface *interface,
1683                             const struct usb_device_id *id)
1684 {
1685         const struct usb_endpoint_descriptor *endpoint;
1686         struct usb_device *udev;
1687         struct usb_interface *uif;
1688         struct em28xx *dev = NULL;
1689         int retval = -ENODEV;
1690         int i, nr, ifnum;
1691
1692         udev = usb_get_dev(interface_to_usbdev(interface));
1693         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1694
1695         /* Check to see next free device and mark as used */
1696         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1697         em28xx_devused|=1<<nr;
1698
1699         /* Don't register audio interfaces */
1700         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1701                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1702                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1703                                 ifnum,
1704                                 interface->altsetting[0].desc.bInterfaceClass);
1705
1706                 em28xx_devused&=~(1<<nr);
1707                 return -ENODEV;
1708         }
1709
1710         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1711                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1712                         ifnum,
1713                         interface->altsetting[0].desc.bInterfaceClass);
1714
1715         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1716
1717         /* check if the device has the iso in endpoint at the correct place */
1718         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1719             USB_ENDPOINT_XFER_ISOC) {
1720                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1721                 em28xx_devused&=~(1<<nr);
1722                 return -ENODEV;
1723         }
1724         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1725                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1726                 em28xx_devused&=~(1<<nr);
1727                 return -ENODEV;
1728         }
1729
1730         if (nr >= EM28XX_MAXBOARDS) {
1731                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1732                 em28xx_devused&=~(1<<nr);
1733                 return -ENOMEM;
1734         }
1735
1736         /* allocate memory for our device state and initialize it */
1737         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1738         if (dev == NULL) {
1739                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1740                 em28xx_devused&=~(1<<nr);
1741                 return -ENOMEM;
1742         }
1743
1744         snprintf(dev->name, 29, "em28xx #%d", nr);
1745         dev->devno = nr;
1746         dev->model = id->driver_info;
1747
1748         /* compute alternate max packet sizes */
1749         uif = udev->actconfig->interface[0];
1750
1751         dev->num_alt=uif->num_altsetting;
1752         em28xx_info("Alternate settings: %i\n",dev->num_alt);
1753 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1754         dev->alt_max_pkt_size = kmalloc(32*
1755                                                 dev->num_alt,GFP_KERNEL);
1756         if (dev->alt_max_pkt_size == NULL) {
1757                 em28xx_errdev("out of memory!\n");
1758                 em28xx_devused&=~(1<<nr);
1759                 kfree(dev);
1760                 return -ENOMEM;
1761         }
1762
1763         for (i = 0; i < dev->num_alt ; i++) {
1764                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1765                                                         wMaxPacketSize);
1766                 dev->alt_max_pkt_size[i] =
1767                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1768                 em28xx_info("Alternate setting %i, max size= %i\n",i,
1769                                                         dev->alt_max_pkt_size[i]);
1770         }
1771
1772         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1773                 dev->model = card[nr];
1774
1775         /* allocate device struct */
1776         retval = em28xx_init_dev(&dev, udev, nr);
1777         if (retval)
1778                 return retval;
1779
1780         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
1781
1782         /* save our data pointer in this interface device */
1783         usb_set_intfdata(interface, dev);
1784         return 0;
1785 }
1786
1787 /*
1788  * em28xx_usb_disconnect()
1789  * called when the device gets diconencted
1790  * video device will be unregistered on v4l2_close in case it is still open
1791  */
1792 static void em28xx_usb_disconnect(struct usb_interface *interface)
1793 {
1794         struct em28xx *dev;
1795
1796         dev = usb_get_intfdata(interface);
1797         usb_set_intfdata(interface, NULL);
1798
1799         if (!dev)
1800                 return;
1801
1802         em28xx_info("disconnecting %s\n", dev->vdev->name);
1803
1804         /* wait until all current v4l2 io is finished then deallocate resources */
1805         mutex_lock(&dev->lock);
1806
1807         wake_up_interruptible_all(&dev->open);
1808
1809         if (dev->users) {
1810                 em28xx_warn
1811                     ("device /dev/video%d is open! Deregistration and memory "
1812                      "deallocation are deferred on close.\n",
1813                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1814
1815                 dev->state |= DEV_MISCONFIGURED;
1816                 em28xx_uninit_isoc(dev);
1817                 dev->state |= DEV_DISCONNECTED;
1818                 wake_up_interruptible(&dev->wait_frame);
1819                 wake_up_interruptible(&dev->wait_stream);
1820         } else {
1821                 dev->state |= DEV_DISCONNECTED;
1822                 em28xx_release_resources(dev);
1823         }
1824
1825
1826         mutex_unlock(&dev->lock);
1827
1828         if (!dev->users) {
1829                 kfree(dev->alt_max_pkt_size);
1830                 kfree(dev);
1831         }
1832
1833 }
1834
1835 static struct usb_driver em28xx_usb_driver = {
1836         .name = "em28xx",
1837         .probe = em28xx_usb_probe,
1838         .disconnect = em28xx_usb_disconnect,
1839         .id_table = em28xx_id_table,
1840 };
1841
1842 static int __init em28xx_module_init(void)
1843 {
1844         int result;
1845
1846         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1847                (EM28XX_VERSION_CODE >> 16) & 0xff,
1848                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1849 #ifdef SNAPSHOT
1850         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1851                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1852 #endif
1853
1854         /* register this driver with the USB subsystem */
1855         result = usb_register(&em28xx_usb_driver);
1856         if (result)
1857                 em28xx_err(DRIVER_NAME
1858                            " usb_register failed. Error number %d.\n", result);
1859
1860         return result;
1861 }
1862
1863 static void __exit em28xx_module_exit(void)
1864 {
1865         /* deregister this driver with the USB subsystem */
1866         usb_deregister(&em28xx_usb_driver);
1867 }
1868
1869 module_init(em28xx_module_init);
1870 module_exit(em28xx_module_exit);