drivers/media/common/saa7146_fops.c

   1 #include <media/saa7146_vv.h>
   2
   3 #define BOARD_CAN_DO_VBI(dev)   (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
   4
   5 /****************************************************************************/
   6 /* resource management functions, shamelessly stolen from saa7134 driver */
   7
   8 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
   9 {
  10         struct saa7146_dev *dev = fh->dev;
  11         struct saa7146_vv *vv = dev->vv_data;
  12
  13         if (fh->resources & bit) {
  14                 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
  15                 /* have it already allocated */
  16                 return 1;
  17         }
  18
  19         /* is it free? */
  20         mutex_lock(&dev->lock);
  21         if (vv->resources & bit) {
  22                 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
  23                 /* no, someone else uses it */
  24                 mutex_unlock(&dev->lock);
  25                 return 0;
  26         }
  27         /* it's free, grab it */
  28         fh->resources  |= bit;
  29         vv->resources |= bit;
  30         DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
  31         mutex_unlock(&dev->lock);
  32         return 1;
  33 }
  34
  35 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
  36 {
  37         struct saa7146_dev *dev = fh->dev;
  38         struct saa7146_vv *vv = dev->vv_data;
  39
  40         BUG_ON((fh->resources & bits) != bits);
  41
  42         mutex_lock(&dev->lock);
  43         fh->resources  &= ~bits;
  44         vv->resources &= ~bits;
  45         DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
  46         mutex_unlock(&dev->lock);
  47 }
  48
  49
  50 /********************************************************************************/
  51 /* common dma functions */
  52
  53 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
  54                                                 struct saa7146_buf *buf)
  55 {
  56         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
  57         DEB_EE(("dev:%p, buf:%p\n",dev,buf));
  58
  59         BUG_ON(in_interrupt());
  60
  61         videobuf_waiton(&buf->vb,0,0);
  62         videobuf_dma_unmap(q, dma);
  63         videobuf_dma_free(dma);
  64         buf->vb.state = VIDEOBUF_NEEDS_INIT;
  65 }
  66
  67
  68 /********************************************************************************/
  69 /* common buffer functions */
  70
  71 int saa7146_buffer_queue(struct saa7146_dev *dev,
  72                          struct saa7146_dmaqueue *q,
  73                          struct saa7146_buf *buf)
  74 {
  75         assert_spin_locked(&dev->slock);
  76         DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
  77
  78         BUG_ON(!q);
  79
  80         if (NULL == q->curr) {
  81                 q->curr = buf;
  82                 DEB_D(("immediately activating buffer %p\n", buf));
  83                 buf->activate(dev,buf,NULL);
  84         } else {
  85                 list_add_tail(&buf->vb.queue,&q->queue);
  86                 buf->vb.state = VIDEOBUF_QUEUED;
  87                 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
  88         }
  89         return 0;
  90 }
  91
  92 void saa7146_buffer_finish(struct saa7146_dev *dev,
  93                            struct saa7146_dmaqueue *q,
  94                            int state)
  95 {
  96         assert_spin_locked(&dev->slock);
  97         DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
  98         DEB_EE(("q->curr:%p\n",q->curr));
  99
 100         BUG_ON(!q->curr);
 101
 102         /* finish current buffer */
 103         if (NULL == q->curr) {
 104                 DEB_D(("aiii. no current buffer\n"));
 105                 return;
 106         }
 107
 108         q->curr->vb.state = state;
 109         do_gettimeofday(&q->curr->vb.ts);
 110         wake_up(&q->curr->vb.done);
 111
 112         q->curr = NULL;
 113 }
 114
 115 void saa7146_buffer_next(struct saa7146_dev *dev,
 116                          struct saa7146_dmaqueue *q, int vbi)
 117 {
 118         struct saa7146_buf *buf,*next = NULL;
 119
 120         BUG_ON(!q);
 121
 122         DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
 123
 124         assert_spin_locked(&dev->slock);
 125         if (!list_empty(&q->queue)) {
 126                 /* activate next one from queue */
 127                 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
 128                 list_del(&buf->vb.queue);
 129                 if (!list_empty(&q->queue))
 130                         next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
 131                 q->curr = buf;
 132                 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
 133                 buf->activate(dev,buf,next);
 134         } else {
 135                 DEB_INT(("no next buffer. stopping.\n"));
 136                 if( 0 != vbi ) {
 137                         /* turn off video-dma3 */
 138                         saa7146_write(dev,MC1, MASK_20);
 139                 } else {
 140                         /* nothing to do -- just prevent next video-dma1 transfer
 141                            by lowering the protection address */
 142
 143                         // fixme: fix this for vflip != 0
 144
 145                         saa7146_write(dev, PROT_ADDR1, 0);
 146                         saa7146_write(dev, MC2, (MASK_02|MASK_18));
 147
 148                         /* write the address of the rps-program */
 149                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
 150                         /* turn on rps */
 151                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
 152
 153 /*
 154                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
 155                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
 156                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
 157                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
 158                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
 159                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
 160 */
 161                 }
 162                 del_timer(&q->timeout);
 163         }
 164 }
 165
 166 void saa7146_buffer_timeout(unsigned long data)
 167 {
 168         struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
 169         struct saa7146_dev *dev = q->dev;
 170         unsigned long flags;
 171
 172         DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
 173
 174         spin_lock_irqsave(&dev->slock,flags);
 175         if (q->curr) {
 176                 DEB_D(("timeout on %p\n", q->curr));
 177                 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
 178         }
 179
 180         /* we don't restart the transfer here like other drivers do. when
 181            a streaming capture is disabled, the timeout function will be
 182            called for the current buffer. if we activate the next buffer now,
 183            we mess up our capture logic. if a timeout occurs on another buffer,
 184            then something is seriously broken before, so no need to buffer the
 185            next capture IMHO... */
 186 /*
 187         saa7146_buffer_next(dev,q);
 188 */
 189         spin_unlock_irqrestore(&dev->slock,flags);
 190 }
 191
 192 /********************************************************************************/
 193 /* file operations */
 194
 195 static int fops_open(struct file *file)
 196 {
 197         unsigned int minor = video_devdata(file)->minor;
 198         struct saa7146_dev *h = NULL, *dev = NULL;
 199         struct list_head *list;
 200         struct saa7146_fh *fh = NULL;
 201         int result = 0;
 202
 203         enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 204
 205         DEB_EE(("file:%p, minor:%d\n", file, minor));
 206
 207         if (mutex_lock_interruptible(&saa7146_devices_lock))
 208                 return -ERESTARTSYS;
 209
 210         list_for_each(list,&saa7146_devices) {
 211                 h = list_entry(list, struct saa7146_dev, item);
 212                 if( NULL == h->vv_data ) {
 213                         DEB_D(("device %p has not registered video devices.\n",h));
 214                         continue;
 215                 }
 216                 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
 217
 218                 if (h->vv_data->video_minor == minor) {
 219                         dev = h;
 220                 }
 221                 if (h->vv_data->vbi_minor == minor) {
 222                         type = V4L2_BUF_TYPE_VBI_CAPTURE;
 223                         dev = h;
 224                 }
 225         }
 226         if (NULL == dev) {
 227                 DEB_S(("no such video device.\n"));
 228                 result = -ENODEV;
 229                 goto out;
 230         }
 231
 232         DEB_D(("using: %p\n",dev));
 233
 234         /* check if an extension is registered */
 235         if( NULL == dev->ext ) {
 236                 DEB_S(("no extension registered for this device.\n"));
 237                 result = -ENODEV;
 238                 goto out;
 239         }
 240
 241         /* allocate per open data */
 242         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
 243         if (NULL == fh) {
 244                 DEB_S(("cannot allocate memory for per open data.\n"));
 245                 result = -ENOMEM;
 246                 goto out;
 247         }
 248
 249         file->private_data = fh;
 250         fh->dev = dev;
 251         fh->type = type;
 252
 253         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 254                 DEB_S(("initializing vbi...\n"));
 255                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 256                         result = saa7146_vbi_uops.open(dev,file);
 257                 if (dev->ext_vv_data->vbi_fops.open)
 258                         dev->ext_vv_data->vbi_fops.open(file);
 259         } else {
 260                 DEB_S(("initializing video...\n"));
 261                 result = saa7146_video_uops.open(dev,file);
 262         }
 263
 264         if (0 != result) {
 265                 goto out;
 266         }
 267
 268         if( 0 == try_module_get(dev->ext->module)) {
 269                 result = -EINVAL;
 270                 goto out;
 271         }
 272
 273         result = 0;
 274 out:
 275         if (fh && result != 0) {
 276                 kfree(fh);
 277                 file->private_data = NULL;
 278         }
 279         mutex_unlock(&saa7146_devices_lock);
 280         return result;
 281 }
 282
 283 static int fops_release(struct file *file)
 284 {
 285         struct saa7146_fh  *fh  = file->private_data;
 286         struct saa7146_dev *dev = fh->dev;
 287
 288         DEB_EE(("file:%p\n", file));
 289
 290         if (mutex_lock_interruptible(&saa7146_devices_lock))
 291                 return -ERESTARTSYS;
 292
 293         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 294                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 295                         saa7146_vbi_uops.release(dev,file);
 296                 if (dev->ext_vv_data->vbi_fops.release)
 297                         dev->ext_vv_data->vbi_fops.release(file);
 298         } else {
 299                 saa7146_video_uops.release(dev,file);
 300         }
 301
 302         module_put(dev->ext->module);
 303         file->private_data = NULL;
 304         kfree(fh);
 305
 306         mutex_unlock(&saa7146_devices_lock);
 307
 308         return 0;
 309 }
 310
 311 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
 312 {
 313         struct saa7146_fh *fh = file->private_data;
 314         struct videobuf_queue *q;
 315
 316         switch (fh->type) {
 317         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 318                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
 319                 q = &fh->video_q;
 320                 break;
 321                 }
 322         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 323                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
 324                 q = &fh->vbi_q;
 325                 break;
 326                 }
 327         default:
 328                 BUG();
 329                 return 0;
 330         }
 331
 332         return videobuf_mmap_mapper(q,vma);
 333 }
 334
 335 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
 336 {
 337         struct saa7146_fh *fh = file->private_data;
 338         struct videobuf_buffer *buf = NULL;
 339         struct videobuf_queue *q;
 340
 341         DEB_EE(("file:%p, poll:%p\n",file, wait));
 342
 343         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
 344                 if( 0 == fh->vbi_q.streaming )
 345                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
 346                 q = &fh->vbi_q;
 347         } else {
 348                 DEB_D(("using video queue.\n"));
 349                 q = &fh->video_q;
 350         }
 351
 352         if (!list_empty(&q->stream))
 353                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
 354
 355         if (!buf) {
 356                 DEB_D(("buf == NULL!\n"));
 357                 return POLLERR;
 358         }
 359
 360         poll_wait(file, &buf->done, wait);
 361         if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
 362                 DEB_D(("poll succeeded!\n"));
 363                 return POLLIN|POLLRDNORM;
 364         }
 365
 366         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
 367         return 0;
 368 }
 369
 370 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 371 {
 372         struct saa7146_fh *fh = file->private_data;
 373
 374         switch (fh->type) {
 375         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 376 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
 377                 return saa7146_video_uops.read(file,data,count,ppos);
 378                 }
 379         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 380 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
 381                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 382                         return saa7146_vbi_uops.read(file,data,count,ppos);
 383                 else
 384                         return -EINVAL;
 385                 }
 386                 break;
 387         default:
 388                 BUG();
 389                 return 0;
 390         }
 391 }
 392
 393 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
 394 {
 395         struct saa7146_fh *fh = file->private_data;
 396
 397         switch (fh->type) {
 398         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 399                 return -EINVAL;
 400         case V4L2_BUF_TYPE_VBI_CAPTURE:
 401                 if (fh->dev->ext_vv_data->vbi_fops.write)
 402                         return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
 403                 else
 404                         return -EINVAL;
 405         default:
 406                 BUG();
 407                 return -EINVAL;
 408         }
 409 }
 410
 411 static const struct v4l2_file_operations video_fops =
 412 {
 413         .owner          = THIS_MODULE,
 414         .open           = fops_open,
 415         .release        = fops_release,
 416         .read           = fops_read,
 417         .write          = fops_write,
 418         .poll           = fops_poll,
 419         .mmap           = fops_mmap,
 420         .ioctl          = video_ioctl2,
 421 };
 422
 423 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 424 {
 425         u32 isr = status;
 426
 427         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
 428
 429         if (0 != (isr & (MASK_27))) {
 430                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
 431                 saa7146_video_uops.irq_done(dev,isr);
 432         }
 433
 434         if (0 != (isr & (MASK_28))) {
 435                 u32 mc2 = saa7146_read(dev, MC2);
 436                 if( 0 != (mc2 & MASK_15)) {
 437                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
 438                         wake_up(&dev->vv_data->vbi_wq);
 439                         saa7146_write(dev,MC2, MASK_31);
 440                         return;
 441                 }
 442                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
 443                 saa7146_vbi_uops.irq_done(dev,isr);
 444         }
 445 }
 446
 447 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 448 {
 449         struct saa7146_vv *vv;
 450         int err;
 451
 452         err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
 453         if (err)
 454                 return err;
 455
 456         vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
 457         if (vv == NULL) {
 458                 ERR(("out of memory. aborting.\n"));
 459                 return -ENOMEM;
 460         }
 461         ext_vv->ops = saa7146_video_ioctl_ops;
 462         ext_vv->core_ops = &saa7146_video_ioctl_ops;
 463
 464         DEB_EE(("dev:%p\n",dev));
 465
 466         /* set default values for video parts of the saa7146 */
 467         saa7146_write(dev, BCS_CTRL, 0x80400040);
 468
 469         /* enable video-port pins */
 470         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
 471
 472         /* save per-device extension data (one extension can
 473            handle different devices that might need different
 474            configuration data) */
 475         dev->ext_vv_data = ext_vv;
 476
 477         vv->video_minor = -1;
 478         vv->vbi_minor = -1;
 479
 480         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
 481         if( NULL == vv->d_clipping.cpu_addr ) {
 482                 ERR(("out of memory. aborting.\n"));
 483                 kfree(vv);
 484                 return -1;
 485         }
 486         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
 487
 488         saa7146_video_uops.init(dev,vv);
 489         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 490                 saa7146_vbi_uops.init(dev,vv);
 491
 492         dev->vv_data = vv;
 493         dev->vv_callback = &vv_callback;
 494
 495         return 0;
 496 }
 497 EXPORT_SYMBOL_GPL(saa7146_vv_init);
 498
 499 int saa7146_vv_release(struct saa7146_dev* dev)
 500 {
 501         struct saa7146_vv *vv = dev->vv_data;
 502
 503         DEB_EE(("dev:%p\n",dev));
 504
 505         v4l2_device_unregister(&dev->v4l2_dev);
 506         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
 507         kfree(vv);
 508         dev->vv_data = NULL;
 509         dev->vv_callback = NULL;
 510
 511         return 0;
 512 }
 513 EXPORT_SYMBOL_GPL(saa7146_vv_release);
 514
 515 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
 516                             char *name, int type)
 517 {
 518         struct saa7146_vv *vv = dev->vv_data;
 519         struct video_device *vfd;
 520         int err;
 521         int i;
 522
 523         DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
 524
 525         // released by vfd->release
 526         vfd = video_device_alloc();
 527         if (vfd == NULL)
 528                 return -ENOMEM;
 529
 530         vfd->fops = &video_fops;
 531         vfd->ioctl_ops = &dev->ext_vv_data->ops;
 532         vfd->release = video_device_release;
 533         vfd->tvnorms = 0;
 534         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 535                 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
 536         strlcpy(vfd->name, name, sizeof(vfd->name));
 537         video_set_drvdata(vfd, dev);
 538
 539         err = video_register_device(vfd, type, -1);
 540         if (err < 0) {
 541                 ERR(("cannot register v4l2 device. skipping.\n"));
 542                 video_device_release(vfd);
 543                 return err;
 544         }
 545
 546         if( VFL_TYPE_GRABBER == type ) {
 547                 vv->video_minor = vfd->minor;
 548                 INFO(("%s: registered device video%d [v4l2]\n",
 549                         dev->name, vfd->num));
 550         } else {
 551                 vv->vbi_minor = vfd->minor;
 552                 INFO(("%s: registered device vbi%d [v4l2]\n",
 553                         dev->name, vfd->num));
 554         }
 555
 556         *vid = vfd;
 557         return 0;
 558 }
 559 EXPORT_SYMBOL_GPL(saa7146_register_device);
 560
 561 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
 562 {
 563         struct saa7146_vv *vv = dev->vv_data;
 564
 565         DEB_EE(("dev:%p\n",dev));
 566
 567         if ((*vid)->vfl_type == VFL_TYPE_GRABBER) {
 568                 vv->video_minor = -1;
 569         } else {
 570                 vv->vbi_minor = -1;
 571         }
 572
 573         video_unregister_device(*vid);
 574         *vid = NULL;
 575
 576         return 0;
 577 }
 578 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
 579
 580 static int __init saa7146_vv_init_module(void)
 581 {
 582         return 0;
 583 }
 584
 585
 586 static void __exit saa7146_vv_cleanup_module(void)
 587 {
 588 }
 589
 590 module_init(saa7146_vv_init_module);
 591 module_exit(saa7146_vv_cleanup_module);
 592
 593 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 594 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 595 MODULE_LICENSE("GPL");