[PATCH] sun3 __iomem annotations
[linux-2.6.git] / 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         DEB_EE(("dev:%p, buf:%p\n",dev,buf));
57
58         BUG_ON(in_interrupt());
59
60         videobuf_waiton(&buf->vb,0,0);
61         videobuf_dma_unmap(q, &buf->vb.dma);
62         videobuf_dma_free(&buf->vb.dma);
63         buf->vb.state = STATE_NEEDS_INIT;
64 }
65
66
67 /********************************************************************************/
68 /* common buffer functions */
69
70 int saa7146_buffer_queue(struct saa7146_dev *dev,
71                          struct saa7146_dmaqueue *q,
72                          struct saa7146_buf *buf)
73 {
74         assert_spin_locked(&dev->slock);
75         DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
76
77         BUG_ON(!q);
78
79         if (NULL == q->curr) {
80                 q->curr = buf;
81                 DEB_D(("immediately activating buffer %p\n", buf));
82                 buf->activate(dev,buf,NULL);
83         } else {
84                 list_add_tail(&buf->vb.queue,&q->queue);
85                 buf->vb.state = STATE_QUEUED;
86                 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
87         }
88         return 0;
89 }
90
91 void saa7146_buffer_finish(struct saa7146_dev *dev,
92                            struct saa7146_dmaqueue *q,
93                            int state)
94 {
95         assert_spin_locked(&dev->slock);
96         DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
97         DEB_EE(("q->curr:%p\n",q->curr));
98
99         BUG_ON(!q->curr);
100
101         /* finish current buffer */
102         if (NULL == q->curr) {
103                 DEB_D(("aiii. no current buffer\n"));
104                 return;
105         }
106
107         q->curr->vb.state = state;
108         do_gettimeofday(&q->curr->vb.ts);
109         wake_up(&q->curr->vb.done);
110
111         q->curr = NULL;
112 }
113
114 void saa7146_buffer_next(struct saa7146_dev *dev,
115                          struct saa7146_dmaqueue *q, int vbi)
116 {
117         struct saa7146_buf *buf,*next = NULL;
118
119         BUG_ON(!q);
120
121         DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
122
123         assert_spin_locked(&dev->slock);
124         if (!list_empty(&q->queue)) {
125                 /* activate next one from queue */
126                 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
127                 list_del(&buf->vb.queue);
128                 if (!list_empty(&q->queue))
129                         next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
130                 q->curr = buf;
131                 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
132                 buf->activate(dev,buf,next);
133         } else {
134                 DEB_INT(("no next buffer. stopping.\n"));
135                 if( 0 != vbi ) {
136                         /* turn off video-dma3 */
137                         saa7146_write(dev,MC1, MASK_20);
138                 } else {
139                         /* nothing to do -- just prevent next video-dma1 transfer
140                            by lowering the protection address */
141
142                         // fixme: fix this for vflip != 0
143
144                         saa7146_write(dev, PROT_ADDR1, 0);
145                         saa7146_write(dev, MC2, (MASK_02|MASK_18));
146
147                         /* write the address of the rps-program */
148                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
149                         /* turn on rps */
150                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
151
152 /*
153                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
154                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
155                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
156                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
157                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
158                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
159 */
160                 }
161                 del_timer(&q->timeout);
162         }
163 }
164
165 void saa7146_buffer_timeout(unsigned long data)
166 {
167         struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
168         struct saa7146_dev *dev = q->dev;
169         unsigned long flags;
170
171         DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
172
173         spin_lock_irqsave(&dev->slock,flags);
174         if (q->curr) {
175                 DEB_D(("timeout on %p\n", q->curr));
176                 saa7146_buffer_finish(dev,q,STATE_ERROR);
177         }
178
179         /* we don't restart the transfer here like other drivers do. when
180            a streaming capture is disabled, the timeout function will be
181            called for the current buffer. if we activate the next buffer now,
182            we mess up our capture logic. if a timeout occurs on another buffer,
183            then something is seriously broken before, so no need to buffer the
184            next capture IMHO... */
185 /*
186         saa7146_buffer_next(dev,q);
187 */
188         spin_unlock_irqrestore(&dev->slock,flags);
189 }
190
191 /********************************************************************************/
192 /* file operations */
193
194 static int fops_open(struct inode *inode, struct file *file)
195 {
196         unsigned int minor = iminor(inode);
197         struct saa7146_dev *h = NULL, *dev = NULL;
198         struct list_head *list;
199         struct saa7146_fh *fh = NULL;
200         int result = 0;
201
202         enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
203
204         DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
205
206         if (mutex_lock_interruptible(&saa7146_devices_lock))
207                 return -ERESTARTSYS;
208
209         list_for_each(list,&saa7146_devices) {
210                 h = list_entry(list, struct saa7146_dev, item);
211                 if( NULL == h->vv_data ) {
212                         DEB_D(("device %p has not registered video devices.\n",h));
213                         continue;
214                 }
215                 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
216
217                 if (h->vv_data->video_minor == minor) {
218                         dev = h;
219                 }
220                 if (h->vv_data->vbi_minor == minor) {
221                         type = V4L2_BUF_TYPE_VBI_CAPTURE;
222                         dev = h;
223                 }
224         }
225         if (NULL == dev) {
226                 DEB_S(("no such video device.\n"));
227                 result = -ENODEV;
228                 goto out;
229         }
230
231         DEB_D(("using: %p\n",dev));
232
233         /* check if an extension is registered */
234         if( NULL == dev->ext ) {
235                 DEB_S(("no extension registered for this device.\n"));
236                 result = -ENODEV;
237                 goto out;
238         }
239
240         /* allocate per open data */
241         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
242         if (NULL == fh) {
243                 DEB_S(("cannot allocate memory for per open data.\n"));
244                 result = -ENOMEM;
245                 goto out;
246         }
247
248         file->private_data = fh;
249         fh->dev = dev;
250         fh->type = type;
251
252         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
253                 DEB_S(("initializing vbi...\n"));
254                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
255                         result = saa7146_vbi_uops.open(dev,file);
256                 if (dev->ext_vv_data->vbi_fops.open)
257                         dev->ext_vv_data->vbi_fops.open(inode, file);
258         } else {
259                 DEB_S(("initializing video...\n"));
260                 result = saa7146_video_uops.open(dev,file);
261         }
262
263         if (0 != result) {
264                 goto out;
265         }
266
267         if( 0 == try_module_get(dev->ext->module)) {
268                 result = -EINVAL;
269                 goto out;
270         }
271
272         result = 0;
273 out:
274         if( fh != 0 && result != 0 ) {
275                 kfree(fh);
276                 file->private_data = NULL;
277         }
278         mutex_unlock(&saa7146_devices_lock);
279         return result;
280 }
281
282 static int fops_release(struct inode *inode, struct file *file)
283 {
284         struct saa7146_fh  *fh  = file->private_data;
285         struct saa7146_dev *dev = fh->dev;
286
287         DEB_EE(("inode:%p, file:%p\n",inode,file));
288
289         if (mutex_lock_interruptible(&saa7146_devices_lock))
290                 return -ERESTARTSYS;
291
292         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
293                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
294                         saa7146_vbi_uops.release(dev,file);
295                 if (dev->ext_vv_data->vbi_fops.release)
296                         dev->ext_vv_data->vbi_fops.release(inode, file);
297         } else {
298                 saa7146_video_uops.release(dev,file);
299         }
300
301         module_put(dev->ext->module);
302         file->private_data = NULL;
303         kfree(fh);
304
305         mutex_unlock(&saa7146_devices_lock);
306
307         return 0;
308 }
309
310 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg);
311 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
312 {
313 /*
314         DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
315 */
316         return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
317 }
318
319 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
320 {
321         struct saa7146_fh *fh = file->private_data;
322         struct videobuf_queue *q;
323
324         switch (fh->type) {
325         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
326                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
327                 q = &fh->video_q;
328                 break;
329                 }
330         case V4L2_BUF_TYPE_VBI_CAPTURE: {
331                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
332                 q = &fh->vbi_q;
333                 break;
334                 }
335         default:
336                 BUG();
337                 return 0;
338         }
339
340         return videobuf_mmap_mapper(q,vma);
341 }
342
343 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
344 {
345         struct saa7146_fh *fh = file->private_data;
346         struct videobuf_buffer *buf = NULL;
347         struct videobuf_queue *q;
348
349         DEB_EE(("file:%p, poll:%p\n",file, wait));
350
351         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
352                 if( 0 == fh->vbi_q.streaming )
353                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
354                 q = &fh->vbi_q;
355         } else {
356                 DEB_D(("using video queue.\n"));
357                 q = &fh->video_q;
358         }
359
360         if (!list_empty(&q->stream))
361                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
362
363         if (!buf) {
364                 DEB_D(("buf == NULL!\n"));
365                 return POLLERR;
366         }
367
368         poll_wait(file, &buf->done, wait);
369         if (buf->state == STATE_DONE || buf->state == STATE_ERROR) {
370                 DEB_D(("poll succeeded!\n"));
371                 return POLLIN|POLLRDNORM;
372         }
373
374         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
375         return 0;
376 }
377
378 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
379 {
380         struct saa7146_fh *fh = file->private_data;
381
382         switch (fh->type) {
383         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
384 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
385                 return saa7146_video_uops.read(file,data,count,ppos);
386                 }
387         case V4L2_BUF_TYPE_VBI_CAPTURE: {
388 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
389                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
390                         return saa7146_vbi_uops.read(file,data,count,ppos);
391                 else
392                         return -EINVAL;
393                 }
394                 break;
395         default:
396                 BUG();
397                 return 0;
398         }
399 }
400
401 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
402 {
403         struct saa7146_fh *fh = file->private_data;
404
405         switch (fh->type) {
406         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
407                 return -EINVAL;
408         case V4L2_BUF_TYPE_VBI_CAPTURE:
409                 if (fh->dev->ext_vv_data->vbi_fops.write)
410                         return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
411                 else
412                         return -EINVAL;
413         default:
414                 BUG();
415                 return -EINVAL;
416         }
417 }
418
419 static struct file_operations video_fops =
420 {
421         .owner          = THIS_MODULE,
422         .open           = fops_open,
423         .release        = fops_release,
424         .read           = fops_read,
425         .write          = fops_write,
426         .poll           = fops_poll,
427         .mmap           = fops_mmap,
428         .ioctl          = fops_ioctl,
429         .llseek         = no_llseek,
430 };
431
432 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
433 {
434         u32 isr = status;
435
436         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
437
438         if (0 != (isr & (MASK_27))) {
439                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
440                 saa7146_video_uops.irq_done(dev,isr);
441         }
442
443         if (0 != (isr & (MASK_28))) {
444                 u32 mc2 = saa7146_read(dev, MC2);
445                 if( 0 != (mc2 & MASK_15)) {
446                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
447                         wake_up(&dev->vv_data->vbi_wq);
448                         saa7146_write(dev,MC2, MASK_31);
449                         return;
450                 }
451                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
452                 saa7146_vbi_uops.irq_done(dev,isr);
453         }
454 }
455
456 static struct video_device device_template =
457 {
458         .fops           = &video_fops,
459         .minor          = -1,
460 };
461
462 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
463 {
464         struct saa7146_vv *vv = kzalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
465         if( NULL == vv ) {
466                 ERR(("out of memory. aborting.\n"));
467                 return -1;
468         }
469
470         DEB_EE(("dev:%p\n",dev));
471
472         /* set default values for video parts of the saa7146 */
473         saa7146_write(dev, BCS_CTRL, 0x80400040);
474
475         /* enable video-port pins */
476         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
477
478         /* save per-device extension data (one extension can
479            handle different devices that might need different
480            configuration data) */
481         dev->ext_vv_data = ext_vv;
482
483         vv->video_minor = -1;
484         vv->vbi_minor = -1;
485
486         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
487         if( NULL == vv->d_clipping.cpu_addr ) {
488                 ERR(("out of memory. aborting.\n"));
489                 kfree(vv);
490                 return -1;
491         }
492         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
493
494         saa7146_video_uops.init(dev,vv);
495         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
496                 saa7146_vbi_uops.init(dev,vv);
497
498         dev->vv_data = vv;
499         dev->vv_callback = &vv_callback;
500
501         return 0;
502 }
503 EXPORT_SYMBOL_GPL(saa7146_vv_init);
504
505 int saa7146_vv_release(struct saa7146_dev* dev)
506 {
507         struct saa7146_vv *vv = dev->vv_data;
508
509         DEB_EE(("dev:%p\n",dev));
510
511         pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
512         kfree(vv);
513         dev->vv_data = NULL;
514         dev->vv_callback = NULL;
515
516         return 0;
517 }
518 EXPORT_SYMBOL_GPL(saa7146_vv_release);
519
520 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
521                             char *name, int type)
522 {
523         struct saa7146_vv *vv = dev->vv_data;
524         struct video_device *vfd;
525
526         DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
527
528         // released by vfd->release
529         vfd = video_device_alloc();
530         if (vfd == NULL)
531                 return -ENOMEM;
532
533         memcpy(vfd, &device_template, sizeof(struct video_device));
534         strlcpy(vfd->name, name, sizeof(vfd->name));
535         vfd->release = video_device_release;
536         vfd->priv = dev;
537
538         // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
539         if (video_register_device(vfd, type, -1) < 0) {
540                 ERR(("cannot register v4l2 device. skipping.\n"));
541                 return -1;
542         }
543
544         if( VFL_TYPE_GRABBER == type ) {
545                 vv->video_minor = vfd->minor;
546                 INFO(("%s: registered device video%d [v4l2]\n",
547                         dev->name, vfd->minor & 0x1f));
548         } else {
549                 vv->vbi_minor = vfd->minor;
550                 INFO(("%s: registered device vbi%d [v4l2]\n",
551                         dev->name, vfd->minor & 0x1f));
552         }
553
554         *vid = vfd;
555         return 0;
556 }
557 EXPORT_SYMBOL_GPL(saa7146_register_device);
558
559 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
560 {
561         struct saa7146_vv *vv = dev->vv_data;
562
563         DEB_EE(("dev:%p\n",dev));
564
565         if( VFL_TYPE_GRABBER == (*vid)->type ) {
566                 vv->video_minor = -1;
567         } else {
568                 vv->vbi_minor = -1;
569         }
570
571         video_unregister_device(*vid);
572         *vid = NULL;
573
574         return 0;
575 }
576 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
577
578 static int __init saa7146_vv_init_module(void)
579 {
580         return 0;
581 }
582
583
584 static void __exit saa7146_vv_cleanup_module(void)
585 {
586 }
587
588 module_init(saa7146_vv_init_module);
589 module_exit(saa7146_vv_cleanup_module);
590
591 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
592 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
593 MODULE_LICENSE("GPL");