kbuild: un-stringnify KBUILD_MODNAME
[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         down(&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                 up(&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         up(&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         if ((fh->resources & bits) != bits)
41                 BUG();
42
43         down(&dev->lock);
44         fh->resources  &= ~bits;
45         vv->resources &= ~bits;
46         DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
47         up(&dev->lock);
48 }
49
50
51 /********************************************************************************/
52 /* common dma functions */
53
54 void saa7146_dma_free(struct saa7146_dev *dev,struct saa7146_buf *buf)
55 {
56         DEB_EE(("dev:%p, buf:%p\n",dev,buf));
57
58         if (in_interrupt())
59                 BUG();
60
61         videobuf_waiton(&buf->vb,0,0);
62         videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma);
63         videobuf_dma_free(&buf->vb.dma);
64         buf->vb.state = STATE_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 = STATE_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,STATE_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 inode *inode, struct file *file)
196 {
197         unsigned int minor = iminor(inode);
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(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
206
207         if (down_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 = kmalloc(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         memset(fh,0,sizeof(*fh));
249
250         file->private_data = fh;
251         fh->dev = dev;
252         fh->type = type;
253
254         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
255                 DEB_S(("initializing vbi...\n"));
256                 result = saa7146_vbi_uops.open(dev,file);
257         } else {
258                 DEB_S(("initializing video...\n"));
259                 result = saa7146_video_uops.open(dev,file);
260         }
261
262         if (0 != result) {
263                 goto out;
264         }
265
266         if( 0 == try_module_get(dev->ext->module)) {
267                 result = -EINVAL;
268                 goto out;
269         }
270
271         result = 0;
272 out:
273         if( fh != 0 && result != 0 ) {
274                 kfree(fh);
275                 file->private_data = NULL;
276         }
277         up(&saa7146_devices_lock);
278         return result;
279 }
280
281 static int fops_release(struct inode *inode, struct file *file)
282 {
283         struct saa7146_fh  *fh  = file->private_data;
284         struct saa7146_dev *dev = fh->dev;
285
286         DEB_EE(("inode:%p, file:%p\n",inode,file));
287
288         if (down_interruptible(&saa7146_devices_lock))
289                 return -ERESTARTSYS;
290
291         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
292                 saa7146_vbi_uops.release(dev,file);
293         } else {
294                 saa7146_video_uops.release(dev,file);
295         }
296
297         module_put(dev->ext->module);
298         file->private_data = NULL;
299         kfree(fh);
300
301         up(&saa7146_devices_lock);
302
303         return 0;
304 }
305
306 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg);
307 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
308 {
309 /*
310         DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
311 */
312         return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
313 }
314
315 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
316 {
317         struct saa7146_fh *fh = file->private_data;
318         struct videobuf_queue *q;
319
320         switch (fh->type) {
321         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
322                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
323                 q = &fh->video_q;
324                 break;
325                 }
326         case V4L2_BUF_TYPE_VBI_CAPTURE: {
327                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
328                 q = &fh->vbi_q;
329                 break;
330                 }
331         default:
332                 BUG();
333                 return 0;
334         }
335         return videobuf_mmap_mapper(q,vma);
336 }
337
338 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
339 {
340         struct saa7146_fh *fh = file->private_data;
341         struct videobuf_buffer *buf = NULL;
342         struct videobuf_queue *q;
343
344         DEB_EE(("file:%p, poll:%p\n",file, wait));
345
346         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
347                 if( 0 == fh->vbi_q.streaming )
348                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
349                 q = &fh->vbi_q;
350         } else {
351                 DEB_D(("using video queue.\n"));
352                 q = &fh->video_q;
353         }
354
355         if (!list_empty(&q->stream))
356                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
357
358         if (!buf) {
359                 DEB_D(("buf == NULL!\n"));
360                 return POLLERR;
361         }
362
363         poll_wait(file, &buf->done, wait);
364         if (buf->state == STATE_DONE || buf->state == STATE_ERROR) {
365                 DEB_D(("poll succeeded!\n"));
366                 return POLLIN|POLLRDNORM;
367         }
368
369         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
370         return 0;
371 }
372
373 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
374 {
375         struct saa7146_fh *fh = file->private_data;
376
377         switch (fh->type) {
378         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
379 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
380                 return saa7146_video_uops.read(file,data,count,ppos);
381                 }
382         case V4L2_BUF_TYPE_VBI_CAPTURE: {
383 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
384                 return saa7146_vbi_uops.read(file,data,count,ppos);
385                 }
386                 break;
387         default:
388                 BUG();
389                 return 0;
390         }
391 }
392
393 static struct file_operations video_fops =
394 {
395         .owner          = THIS_MODULE,
396         .open           = fops_open,
397         .release        = fops_release,
398         .read           = fops_read,
399         .poll           = fops_poll,
400         .mmap           = fops_mmap,
401         .ioctl          = fops_ioctl,
402         .llseek         = no_llseek,
403 };
404
405 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
406 {
407         u32 isr = status;
408
409         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
410
411         if (0 != (isr & (MASK_27))) {
412                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
413                 saa7146_video_uops.irq_done(dev,isr);
414         }
415
416         if (0 != (isr & (MASK_28))) {
417                 u32 mc2 = saa7146_read(dev, MC2);
418                 if( 0 != (mc2 & MASK_15)) {
419                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
420                         wake_up(&dev->vv_data->vbi_wq);
421                         saa7146_write(dev,MC2, MASK_31);
422                         return;
423                 }
424                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
425                 saa7146_vbi_uops.irq_done(dev,isr);
426         }
427 }
428
429 static struct video_device device_template =
430 {
431         .hardware       = VID_HARDWARE_SAA7146,
432         .fops           = &video_fops,
433         .minor          = -1,
434 };
435
436 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
437 {
438         struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
439         if( NULL == vv ) {
440                 ERR(("out of memory. aborting.\n"));
441                 return -1;
442         }
443         memset(vv, 0x0, sizeof(*vv));
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         saa7146_vbi_uops.init(dev,vv);
471
472         dev->vv_data = vv;
473         dev->vv_callback = &vv_callback;
474
475         return 0;
476 }
477
478 int saa7146_vv_release(struct saa7146_dev* dev)
479 {
480         struct saa7146_vv *vv = dev->vv_data;
481
482         DEB_EE(("dev:%p\n",dev));
483
484         pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
485         kfree(vv);
486         dev->vv_data = NULL;
487         dev->vv_callback = NULL;
488
489         return 0;
490 }
491
492 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
493                             char *name, int type)
494 {
495         struct saa7146_vv *vv = dev->vv_data;
496         struct video_device *vfd;
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         memcpy(vfd, &device_template, sizeof(struct video_device));
506         strlcpy(vfd->name, name, sizeof(vfd->name));
507         vfd->release = video_device_release;
508         vfd->priv = dev;
509
510         // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
511         if (video_register_device(vfd, type, -1) < 0) {
512                 ERR(("cannot register v4l2 device. skipping.\n"));
513                 return -1;
514         }
515
516         if( VFL_TYPE_GRABBER == type ) {
517                 vv->video_minor = vfd->minor;
518                 INFO(("%s: registered device video%d [v4l2]\n",
519                         dev->name, vfd->minor & 0x1f));
520         } else {
521                 vv->vbi_minor = vfd->minor;
522                 INFO(("%s: registered device vbi%d [v4l2]\n",
523                         dev->name, vfd->minor & 0x1f));
524         }
525
526         *vid = vfd;
527         return 0;
528 }
529
530 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
531 {
532         struct saa7146_vv *vv = dev->vv_data;
533
534         DEB_EE(("dev:%p\n",dev));
535
536         if( VFL_TYPE_GRABBER == (*vid)->type ) {
537                 vv->video_minor = -1;
538         } else {
539                 vv->vbi_minor = -1;
540         }
541
542         video_unregister_device(*vid);
543         *vid = NULL;
544
545         return 0;
546 }
547
548 static int __init saa7146_vv_init_module(void)
549 {
550         return 0;
551 }
552
553
554 static void __exit saa7146_vv_cleanup_module(void)
555 {
556 }
557
558 module_init(saa7146_vv_init_module);
559 module_exit(saa7146_vv_cleanup_module);
560
561 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
562 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
563 MODULE_LICENSE("GPL");