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         struct video_device *vdev = video_devdata(file);
 198         struct saa7146_dev *dev = video_drvdata(file);
 199         struct saa7146_fh *fh = NULL;
 200         int result = 0;
 201
 202         enum v4l2_buf_type type;
 203
 204         DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
 205
 206         if (mutex_lock_interruptible(&saa7146_devices_lock))
 207                 return -ERESTARTSYS;
 208
 209         DEB_D(("using: %p\n",dev));
 210
 211         type = vdev->vfl_type == VFL_TYPE_GRABBER
 212              ? V4L2_BUF_TYPE_VIDEO_CAPTURE
 213              : V4L2_BUF_TYPE_VBI_CAPTURE;
 214
 215         /* check if an extension is registered */
 216         if( NULL == dev->ext ) {
 217                 DEB_S(("no extension registered for this device.\n"));
 218                 result = -ENODEV;
 219                 goto out;
 220         }
 221
 222         /* allocate per open data */
 223         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
 224         if (NULL == fh) {
 225                 DEB_S(("cannot allocate memory for per open data.\n"));
 226                 result = -ENOMEM;
 227                 goto out;
 228         }
 229
 230         file->private_data = fh;
 231         fh->dev = dev;
 232         fh->type = type;
 233
 234         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 235                 DEB_S(("initializing vbi...\n"));
 236                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 237                         result = saa7146_vbi_uops.open(dev,file);
 238                 if (dev->ext_vv_data->vbi_fops.open)
 239                         dev->ext_vv_data->vbi_fops.open(file);
 240         } else {
 241                 DEB_S(("initializing video...\n"));
 242                 result = saa7146_video_uops.open(dev,file);
 243         }
 244
 245         if (0 != result) {
 246                 goto out;
 247         }
 248
 249         if( 0 == try_module_get(dev->ext->module)) {
 250                 result = -EINVAL;
 251                 goto out;
 252         }
 253
 254         result = 0;
 255 out:
 256         if (fh && result != 0) {
 257                 kfree(fh);
 258                 file->private_data = NULL;
 259         }
 260         mutex_unlock(&saa7146_devices_lock);
 261         return result;
 262 }
 263
 264 static int fops_release(struct file *file)
 265 {
 266         struct saa7146_fh  *fh  = file->private_data;
 267         struct saa7146_dev *dev = fh->dev;
 268
 269         DEB_EE(("file:%p\n", file));
 270
 271         if (mutex_lock_interruptible(&saa7146_devices_lock))
 272                 return -ERESTARTSYS;
 273
 274         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 275                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 276                         saa7146_vbi_uops.release(dev,file);
 277                 if (dev->ext_vv_data->vbi_fops.release)
 278                         dev->ext_vv_data->vbi_fops.release(file);
 279         } else {
 280                 saa7146_video_uops.release(dev,file);
 281         }
 282
 283         module_put(dev->ext->module);
 284         file->private_data = NULL;
 285         kfree(fh);
 286
 287         mutex_unlock(&saa7146_devices_lock);
 288
 289         return 0;
 290 }
 291
 292 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
 293 {
 294         struct saa7146_fh *fh = file->private_data;
 295         struct videobuf_queue *q;
 296
 297         switch (fh->type) {
 298         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 299                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
 300                 q = &fh->video_q;
 301                 break;
 302                 }
 303         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 304                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
 305                 q = &fh->vbi_q;
 306                 break;
 307                 }
 308         default:
 309                 BUG();
 310                 return 0;
 311         }
 312
 313         return videobuf_mmap_mapper(q,vma);
 314 }
 315
 316 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
 317 {
 318         struct saa7146_fh *fh = file->private_data;
 319         struct videobuf_buffer *buf = NULL;
 320         struct videobuf_queue *q;
 321
 322         DEB_EE(("file:%p, poll:%p\n",file, wait));
 323
 324         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
 325                 if( 0 == fh->vbi_q.streaming )
 326                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
 327                 q = &fh->vbi_q;
 328         } else {
 329                 DEB_D(("using video queue.\n"));
 330                 q = &fh->video_q;
 331         }
 332
 333         if (!list_empty(&q->stream))
 334                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
 335
 336         if (!buf) {
 337                 DEB_D(("buf == NULL!\n"));
 338                 return POLLERR;
 339         }
 340
 341         poll_wait(file, &buf->done, wait);
 342         if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
 343                 DEB_D(("poll succeeded!\n"));
 344                 return POLLIN|POLLRDNORM;
 345         }
 346
 347         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
 348         return 0;
 349 }
 350
 351 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 352 {
 353         struct saa7146_fh *fh = file->private_data;
 354
 355         switch (fh->type) {
 356         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 357 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
 358                 return saa7146_video_uops.read(file,data,count,ppos);
 359                 }
 360         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 361 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
 362                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 363                         return saa7146_vbi_uops.read(file,data,count,ppos);
 364                 else
 365                         return -EINVAL;
 366                 }
 367                 break;
 368         default:
 369                 BUG();
 370                 return 0;
 371         }
 372 }
 373
 374 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
 375 {
 376         struct saa7146_fh *fh = file->private_data;
 377
 378         switch (fh->type) {
 379         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 380                 return -EINVAL;
 381         case V4L2_BUF_TYPE_VBI_CAPTURE:
 382                 if (fh->dev->ext_vv_data->vbi_fops.write)
 383                         return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
 384                 else
 385                         return -EINVAL;
 386         default:
 387                 BUG();
 388                 return -EINVAL;
 389         }
 390 }
 391
 392 static const struct v4l2_file_operations video_fops =
 393 {
 394         .owner          = THIS_MODULE,
 395         .open           = fops_open,
 396         .release        = fops_release,
 397         .read           = fops_read,
 398         .write          = fops_write,
 399         .poll           = fops_poll,
 400         .mmap           = fops_mmap,
 401         .ioctl          = video_ioctl2,
 402 };
 403
 404 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 405 {
 406         u32 isr = status;
 407
 408         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
 409
 410         if (0 != (isr & (MASK_27))) {
 411                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
 412                 saa7146_video_uops.irq_done(dev,isr);
 413         }
 414
 415         if (0 != (isr & (MASK_28))) {
 416                 u32 mc2 = saa7146_read(dev, MC2);
 417                 if( 0 != (mc2 & MASK_15)) {
 418                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
 419                         wake_up(&dev->vv_data->vbi_wq);
 420                         saa7146_write(dev,MC2, MASK_31);
 421                         return;
 422                 }
 423                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
 424                 saa7146_vbi_uops.irq_done(dev,isr);
 425         }
 426 }
 427
 428 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 429 {
 430         struct saa7146_vv *vv;
 431         int err;
 432
 433         err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
 434         if (err)
 435                 return err;
 436
 437         vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
 438         if (vv == NULL) {
 439                 ERR(("out of memory. aborting.\n"));
 440                 return -ENOMEM;
 441         }
 442         ext_vv->ops = saa7146_video_ioctl_ops;
 443         ext_vv->core_ops = &saa7146_video_ioctl_ops;
 444
 445         DEB_EE(("dev:%p\n",dev));
 446
 447         /* set default values for video parts of the saa7146 */
 448         saa7146_write(dev, BCS_CTRL, 0x80400040);
 449
 450         /* enable video-port pins */
 451         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
 452
 453         /* save per-device extension data (one extension can
 454            handle different devices that might need different
 455            configuration data) */
 456         dev->ext_vv_data = ext_vv;
 457
 458         vv->video_minor = -1;
 459         vv->vbi_minor = -1;
 460
 461         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
 462         if( NULL == vv->d_clipping.cpu_addr ) {
 463                 ERR(("out of memory. aborting.\n"));
 464                 kfree(vv);
 465                 return -1;
 466         }
 467         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
 468
 469         saa7146_video_uops.init(dev,vv);
 470         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 471                 saa7146_vbi_uops.init(dev,vv);
 472
 473         dev->vv_data = vv;
 474         dev->vv_callback = &vv_callback;
 475
 476         return 0;
 477 }
 478 EXPORT_SYMBOL_GPL(saa7146_vv_init);
 479
 480 int saa7146_vv_release(struct saa7146_dev* dev)
 481 {
 482         struct saa7146_vv *vv = dev->vv_data;
 483
 484         DEB_EE(("dev:%p\n",dev));
 485
 486         v4l2_device_unregister(&dev->v4l2_dev);
 487         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
 488         kfree(vv);
 489         dev->vv_data = NULL;
 490         dev->vv_callback = NULL;
 491
 492         return 0;
 493 }
 494 EXPORT_SYMBOL_GPL(saa7146_vv_release);
 495
 496 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
 497                             char *name, int type)
 498 {
 499         struct saa7146_vv *vv = dev->vv_data;
 500         struct video_device *vfd;
 501         int err;
 502         int i;
 503
 504         DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
 505
 506         // released by vfd->release
 507         vfd = video_device_alloc();
 508         if (vfd == NULL)
 509                 return -ENOMEM;
 510
 511         vfd->fops = &video_fops;
 512         vfd->ioctl_ops = &dev->ext_vv_data->ops;
 513         vfd->release = video_device_release;
 514         vfd->tvnorms = 0;
 515         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 516                 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
 517         strlcpy(vfd->name, name, sizeof(vfd->name));
 518         video_set_drvdata(vfd, dev);
 519
 520         err = video_register_device(vfd, type, -1);
 521         if (err < 0) {
 522                 ERR(("cannot register v4l2 device. skipping.\n"));
 523                 video_device_release(vfd);
 524                 return err;
 525         }
 526
 527         if (VFL_TYPE_GRABBER == type)
 528                 vv->video_minor = vfd->minor;
 529         else
 530                 vv->vbi_minor = vfd->minor;
 531
 532         INFO(("%s: registered device %s [v4l2]\n",
 533                 dev->name, video_device_node_name(vfd)));
 534
 535         *vid = vfd;
 536         return 0;
 537 }
 538 EXPORT_SYMBOL_GPL(saa7146_register_device);
 539
 540 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
 541 {
 542         struct saa7146_vv *vv = dev->vv_data;
 543
 544         DEB_EE(("dev:%p\n",dev));
 545
 546         if ((*vid)->vfl_type == VFL_TYPE_GRABBER) {
 547                 vv->video_minor = -1;
 548         } else {
 549                 vv->vbi_minor = -1;
 550         }
 551
 552         video_unregister_device(*vid);
 553         *vid = NULL;
 554
 555         return 0;
 556 }
 557 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
 558
 559 static int __init saa7146_vv_init_module(void)
 560 {
 561         return 0;
 562 }
 563
 564
 565 static void __exit saa7146_vv_cleanup_module(void)
 566 {
 567 }
 568
 569 module_init(saa7146_vv_init_module);
 570 module_exit(saa7146_vv_cleanup_module);
 571
 572 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 573 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 574 MODULE_LICENSE("GPL");