V4L/DVB: videobuf: add queue argument to videobuf_waiton()
[linux-2.6.git] / drivers / media / common / saa7146_fops.c
1 #include <media/saa7146_vv.h>
2
3 /****************************************************************************/
4 /* resource management functions, shamelessly stolen from saa7134 driver */
5
6 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
7 {
8         struct saa7146_dev *dev = fh->dev;
9         struct saa7146_vv *vv = dev->vv_data;
10
11         if (fh->resources & bit) {
12                 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
13                 /* have it already allocated */
14                 return 1;
15         }
16
17         /* is it free? */
18         mutex_lock(&dev->lock);
19         if (vv->resources & bit) {
20                 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
21                 /* no, someone else uses it */
22                 mutex_unlock(&dev->lock);
23                 return 0;
24         }
25         /* it's free, grab it */
26         fh->resources  |= bit;
27         vv->resources |= bit;
28         DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
29         mutex_unlock(&dev->lock);
30         return 1;
31 }
32
33 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
34 {
35         struct saa7146_dev *dev = fh->dev;
36         struct saa7146_vv *vv = dev->vv_data;
37
38         BUG_ON((fh->resources & bits) != bits);
39
40         mutex_lock(&dev->lock);
41         fh->resources  &= ~bits;
42         vv->resources &= ~bits;
43         DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
44         mutex_unlock(&dev->lock);
45 }
46
47
48 /********************************************************************************/
49 /* common dma functions */
50
51 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
52                                                 struct saa7146_buf *buf)
53 {
54         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
55         DEB_EE(("dev:%p, buf:%p\n",dev,buf));
56
57         BUG_ON(in_interrupt());
58
59         videobuf_waiton(q, &buf->vb, 0, 0);
60         videobuf_dma_unmap(q->dev, dma);
61         videobuf_dma_free(dma);
62         buf->vb.state = VIDEOBUF_NEEDS_INIT;
63 }
64
65
66 /********************************************************************************/
67 /* common buffer functions */
68
69 int saa7146_buffer_queue(struct saa7146_dev *dev,
70                          struct saa7146_dmaqueue *q,
71                          struct saa7146_buf *buf)
72 {
73         assert_spin_locked(&dev->slock);
74         DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
75
76         BUG_ON(!q);
77
78         if (NULL == q->curr) {
79                 q->curr = buf;
80                 DEB_D(("immediately activating buffer %p\n", buf));
81                 buf->activate(dev,buf,NULL);
82         } else {
83                 list_add_tail(&buf->vb.queue,&q->queue);
84                 buf->vb.state = VIDEOBUF_QUEUED;
85                 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
86         }
87         return 0;
88 }
89
90 void saa7146_buffer_finish(struct saa7146_dev *dev,
91                            struct saa7146_dmaqueue *q,
92                            int state)
93 {
94         assert_spin_locked(&dev->slock);
95         DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
96         DEB_EE(("q->curr:%p\n",q->curr));
97
98         BUG_ON(!q->curr);
99
100         /* finish current buffer */
101         if (NULL == q->curr) {
102                 DEB_D(("aiii. no current buffer\n"));
103                 return;
104         }
105
106         q->curr->vb.state = state;
107         do_gettimeofday(&q->curr->vb.ts);
108         wake_up(&q->curr->vb.done);
109
110         q->curr = NULL;
111 }
112
113 void saa7146_buffer_next(struct saa7146_dev *dev,
114                          struct saa7146_dmaqueue *q, int vbi)
115 {
116         struct saa7146_buf *buf,*next = NULL;
117
118         BUG_ON(!q);
119
120         DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
121
122         assert_spin_locked(&dev->slock);
123         if (!list_empty(&q->queue)) {
124                 /* activate next one from queue */
125                 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
126                 list_del(&buf->vb.queue);
127                 if (!list_empty(&q->queue))
128                         next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
129                 q->curr = buf;
130                 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
131                 buf->activate(dev,buf,next);
132         } else {
133                 DEB_INT(("no next buffer. stopping.\n"));
134                 if( 0 != vbi ) {
135                         /* turn off video-dma3 */
136                         saa7146_write(dev,MC1, MASK_20);
137                 } else {
138                         /* nothing to do -- just prevent next video-dma1 transfer
139                            by lowering the protection address */
140
141                         // fixme: fix this for vflip != 0
142
143                         saa7146_write(dev, PROT_ADDR1, 0);
144                         saa7146_write(dev, MC2, (MASK_02|MASK_18));
145
146                         /* write the address of the rps-program */
147                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
148                         /* turn on rps */
149                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
150
151 /*
152                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
153                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
154                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
155                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
156                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
157                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
158 */
159                 }
160                 del_timer(&q->timeout);
161         }
162 }
163
164 void saa7146_buffer_timeout(unsigned long data)
165 {
166         struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
167         struct saa7146_dev *dev = q->dev;
168         unsigned long flags;
169
170         DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
171
172         spin_lock_irqsave(&dev->slock,flags);
173         if (q->curr) {
174                 DEB_D(("timeout on %p\n", q->curr));
175                 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
176         }
177
178         /* we don't restart the transfer here like other drivers do. when
179            a streaming capture is disabled, the timeout function will be
180            called for the current buffer. if we activate the next buffer now,
181            we mess up our capture logic. if a timeout occurs on another buffer,
182            then something is seriously broken before, so no need to buffer the
183            next capture IMHO... */
184 /*
185         saa7146_buffer_next(dev,q);
186 */
187         spin_unlock_irqrestore(&dev->slock,flags);
188 }
189
190 /********************************************************************************/
191 /* file operations */
192
193 static int fops_open(struct file *file)
194 {
195         struct video_device *vdev = video_devdata(file);
196         struct saa7146_dev *dev = video_drvdata(file);
197         struct saa7146_fh *fh = NULL;
198         int result = 0;
199
200         enum v4l2_buf_type type;
201
202         DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
203
204         if (mutex_lock_interruptible(&saa7146_devices_lock))
205                 return -ERESTARTSYS;
206
207         DEB_D(("using: %p\n",dev));
208
209         type = vdev->vfl_type == VFL_TYPE_GRABBER
210              ? V4L2_BUF_TYPE_VIDEO_CAPTURE
211              : V4L2_BUF_TYPE_VBI_CAPTURE;
212
213         /* check if an extension is registered */
214         if( NULL == dev->ext ) {
215                 DEB_S(("no extension registered for this device.\n"));
216                 result = -ENODEV;
217                 goto out;
218         }
219
220         /* allocate per open data */
221         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
222         if (NULL == fh) {
223                 DEB_S(("cannot allocate memory for per open data.\n"));
224                 result = -ENOMEM;
225                 goto out;
226         }
227
228         file->private_data = fh;
229         fh->dev = dev;
230         fh->type = type;
231
232         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
233                 DEB_S(("initializing vbi...\n"));
234                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
235                         result = saa7146_vbi_uops.open(dev,file);
236                 if (dev->ext_vv_data->vbi_fops.open)
237                         dev->ext_vv_data->vbi_fops.open(file);
238         } else {
239                 DEB_S(("initializing video...\n"));
240                 result = saa7146_video_uops.open(dev,file);
241         }
242
243         if (0 != result) {
244                 goto out;
245         }
246
247         if( 0 == try_module_get(dev->ext->module)) {
248                 result = -EINVAL;
249                 goto out;
250         }
251
252         result = 0;
253 out:
254         if (fh && result != 0) {
255                 kfree(fh);
256                 file->private_data = NULL;
257         }
258         mutex_unlock(&saa7146_devices_lock);
259         return result;
260 }
261
262 static int fops_release(struct file *file)
263 {
264         struct saa7146_fh  *fh  = file->private_data;
265         struct saa7146_dev *dev = fh->dev;
266
267         DEB_EE(("file:%p\n", file));
268
269         if (mutex_lock_interruptible(&saa7146_devices_lock))
270                 return -ERESTARTSYS;
271
272         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
273                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
274                         saa7146_vbi_uops.release(dev,file);
275                 if (dev->ext_vv_data->vbi_fops.release)
276                         dev->ext_vv_data->vbi_fops.release(file);
277         } else {
278                 saa7146_video_uops.release(dev,file);
279         }
280
281         module_put(dev->ext->module);
282         file->private_data = NULL;
283         kfree(fh);
284
285         mutex_unlock(&saa7146_devices_lock);
286
287         return 0;
288 }
289
290 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
291 {
292         struct saa7146_fh *fh = file->private_data;
293         struct videobuf_queue *q;
294
295         switch (fh->type) {
296         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
297                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
298                 q = &fh->video_q;
299                 break;
300                 }
301         case V4L2_BUF_TYPE_VBI_CAPTURE: {
302                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
303                 q = &fh->vbi_q;
304                 break;
305                 }
306         default:
307                 BUG();
308                 return 0;
309         }
310
311         return videobuf_mmap_mapper(q,vma);
312 }
313
314 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
315 {
316         struct saa7146_fh *fh = file->private_data;
317         struct videobuf_buffer *buf = NULL;
318         struct videobuf_queue *q;
319
320         DEB_EE(("file:%p, poll:%p\n",file, wait));
321
322         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
323                 if( 0 == fh->vbi_q.streaming )
324                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
325                 q = &fh->vbi_q;
326         } else {
327                 DEB_D(("using video queue.\n"));
328                 q = &fh->video_q;
329         }
330
331         if (!list_empty(&q->stream))
332                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
333
334         if (!buf) {
335                 DEB_D(("buf == NULL!\n"));
336                 return POLLERR;
337         }
338
339         poll_wait(file, &buf->done, wait);
340         if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
341                 DEB_D(("poll succeeded!\n"));
342                 return POLLIN|POLLRDNORM;
343         }
344
345         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
346         return 0;
347 }
348
349 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
350 {
351         struct saa7146_fh *fh = file->private_data;
352
353         switch (fh->type) {
354         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
355 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
356                 return saa7146_video_uops.read(file,data,count,ppos);
357                 }
358         case V4L2_BUF_TYPE_VBI_CAPTURE: {
359 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
360                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
361                         return saa7146_vbi_uops.read(file,data,count,ppos);
362                 else
363                         return -EINVAL;
364                 }
365                 break;
366         default:
367                 BUG();
368                 return 0;
369         }
370 }
371
372 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
373 {
374         struct saa7146_fh *fh = file->private_data;
375
376         switch (fh->type) {
377         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
378                 return -EINVAL;
379         case V4L2_BUF_TYPE_VBI_CAPTURE:
380                 if (fh->dev->ext_vv_data->vbi_fops.write)
381                         return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
382                 else
383                         return -EINVAL;
384         default:
385                 BUG();
386                 return -EINVAL;
387         }
388 }
389
390 static const struct v4l2_file_operations video_fops =
391 {
392         .owner          = THIS_MODULE,
393         .open           = fops_open,
394         .release        = fops_release,
395         .read           = fops_read,
396         .write          = fops_write,
397         .poll           = fops_poll,
398         .mmap           = fops_mmap,
399         .ioctl          = video_ioctl2,
400 };
401
402 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
403 {
404         u32 isr = status;
405
406         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
407
408         if (0 != (isr & (MASK_27))) {
409                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
410                 saa7146_video_uops.irq_done(dev,isr);
411         }
412
413         if (0 != (isr & (MASK_28))) {
414                 u32 mc2 = saa7146_read(dev, MC2);
415                 if( 0 != (mc2 & MASK_15)) {
416                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
417                         wake_up(&dev->vv_data->vbi_wq);
418                         saa7146_write(dev,MC2, MASK_31);
419                         return;
420                 }
421                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
422                 saa7146_vbi_uops.irq_done(dev,isr);
423         }
424 }
425
426 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
427 {
428         struct saa7146_vv *vv;
429         int err;
430
431         err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
432         if (err)
433                 return err;
434
435         vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
436         if (vv == NULL) {
437                 ERR(("out of memory. aborting.\n"));
438                 return -ENOMEM;
439         }
440         ext_vv->ops = saa7146_video_ioctl_ops;
441         ext_vv->core_ops = &saa7146_video_ioctl_ops;
442
443         DEB_EE(("dev:%p\n",dev));
444
445         /* set default values for video parts of the saa7146 */
446         saa7146_write(dev, BCS_CTRL, 0x80400040);
447
448         /* enable video-port pins */
449         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
450
451         /* save per-device extension data (one extension can
452            handle different devices that might need different
453            configuration data) */
454         dev->ext_vv_data = ext_vv;
455
456         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
457         if( NULL == vv->d_clipping.cpu_addr ) {
458                 ERR(("out of memory. aborting.\n"));
459                 kfree(vv);
460                 return -1;
461         }
462         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
463
464         saa7146_video_uops.init(dev,vv);
465         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
466                 saa7146_vbi_uops.init(dev,vv);
467
468         dev->vv_data = vv;
469         dev->vv_callback = &vv_callback;
470
471         return 0;
472 }
473 EXPORT_SYMBOL_GPL(saa7146_vv_init);
474
475 int saa7146_vv_release(struct saa7146_dev* dev)
476 {
477         struct saa7146_vv *vv = dev->vv_data;
478
479         DEB_EE(("dev:%p\n",dev));
480
481         v4l2_device_unregister(&dev->v4l2_dev);
482         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
483         kfree(vv);
484         dev->vv_data = NULL;
485         dev->vv_callback = NULL;
486
487         return 0;
488 }
489 EXPORT_SYMBOL_GPL(saa7146_vv_release);
490
491 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
492                             char *name, int type)
493 {
494         struct video_device *vfd;
495         int err;
496         int i;
497
498         DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
499
500         // released by vfd->release
501         vfd = video_device_alloc();
502         if (vfd == NULL)
503                 return -ENOMEM;
504
505         vfd->fops = &video_fops;
506         vfd->ioctl_ops = &dev->ext_vv_data->ops;
507         vfd->release = video_device_release;
508         vfd->tvnorms = 0;
509         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
510                 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
511         strlcpy(vfd->name, name, sizeof(vfd->name));
512         video_set_drvdata(vfd, dev);
513
514         err = video_register_device(vfd, type, -1);
515         if (err < 0) {
516                 ERR(("cannot register v4l2 device. skipping.\n"));
517                 video_device_release(vfd);
518                 return err;
519         }
520
521         INFO(("%s: registered device %s [v4l2]\n",
522                 dev->name, video_device_node_name(vfd)));
523
524         *vid = vfd;
525         return 0;
526 }
527 EXPORT_SYMBOL_GPL(saa7146_register_device);
528
529 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
530 {
531         DEB_EE(("dev:%p\n",dev));
532
533         video_unregister_device(*vid);
534         *vid = NULL;
535
536         return 0;
537 }
538 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
539
540 static int __init saa7146_vv_init_module(void)
541 {
542         return 0;
543 }
544
545
546 static void __exit saa7146_vv_cleanup_module(void)
547 {
548 }
549
550 module_init(saa7146_vv_init_module);
551 module_exit(saa7146_vv_cleanup_module);
552
553 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
554 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
555 MODULE_LICENSE("GPL");