[PATCH] make various thing static
[linux-2.6.git] / drivers / media / common / saa7146_fops.c
1 #include <media/saa7146_vv.h>
2 #include <linux/version.h>
3
4 #define BOARD_CAN_DO_VBI(dev)   (dev->revision != 0 && dev->vv_data->vbi_minor != -1) 
5
6 /****************************************************************************/
7 /* resource management functions, shamelessly stolen from saa7134 driver */
8
9 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
10 {
11         struct saa7146_dev *dev = fh->dev;
12         struct saa7146_vv *vv = dev->vv_data;
13
14         if (fh->resources & bit) {
15                 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
16                 /* have it already allocated */
17                 return 1;
18         }
19
20         /* is it free? */
21         down(&dev->lock);
22         if (vv->resources & bit) {
23                 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
24                 /* no, someone else uses it */
25                 up(&dev->lock);
26                 return 0;
27         }
28         /* it's free, grab it */
29         fh->resources  |= bit;
30         vv->resources |= bit;
31         DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
32         up(&dev->lock);
33         return 1;
34 }
35
36 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
37 {
38         struct saa7146_dev *dev = fh->dev;
39         struct saa7146_vv *vv = dev->vv_data;
40
41         if ((fh->resources & bits) != bits)
42                 BUG();
43
44         down(&dev->lock);
45         fh->resources  &= ~bits;
46         vv->resources &= ~bits;
47         DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
48         up(&dev->lock);
49 }
50
51
52 /********************************************************************************/
53 /* common dma functions */
54
55 void saa7146_dma_free(struct saa7146_dev *dev,struct saa7146_buf *buf)
56 {
57         DEB_EE(("dev:%p, buf:%p\n",dev,buf));
58
59         if (in_interrupt())
60                 BUG();
61
62         videobuf_waiton(&buf->vb,0,0);
63         videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma);
64         videobuf_dma_free(&buf->vb.dma);
65         buf->vb.state = STATE_NEEDS_INIT;
66 }
67
68
69 /********************************************************************************/
70 /* common buffer functions */
71
72 int saa7146_buffer_queue(struct saa7146_dev *dev,
73                          struct saa7146_dmaqueue *q,
74                          struct saa7146_buf *buf)
75 {
76         assert_spin_locked(&dev->slock);
77         DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
78
79         BUG_ON(!q);
80
81         if (NULL == q->curr) {
82                 q->curr = buf;
83                 DEB_D(("immediately activating buffer %p\n", buf));
84                 buf->activate(dev,buf,NULL);
85         } else {
86                 list_add_tail(&buf->vb.queue,&q->queue);
87                 buf->vb.state = STATE_QUEUED;
88                 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
89         }
90         return 0;
91 }
92
93 void saa7146_buffer_finish(struct saa7146_dev *dev,
94                            struct saa7146_dmaqueue *q,
95                            int state)
96 {
97         assert_spin_locked(&dev->slock);
98         DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
99         DEB_EE(("q->curr:%p\n",q->curr));
100
101         BUG_ON(!q->curr);
102
103         /* finish current buffer */
104         if (NULL == q->curr) {
105                 DEB_D(("aiii. no current buffer\n"));
106                 return; 
107         }
108                         
109         q->curr->vb.state = state;
110         do_gettimeofday(&q->curr->vb.ts);
111         wake_up(&q->curr->vb.done);
112
113         q->curr = NULL;
114 }
115
116 void saa7146_buffer_next(struct saa7146_dev *dev,
117                          struct saa7146_dmaqueue *q, int vbi)
118 {
119         struct saa7146_buf *buf,*next = NULL;
120
121         BUG_ON(!q);
122
123         DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
124
125         assert_spin_locked(&dev->slock);
126         if (!list_empty(&q->queue)) {
127                 /* activate next one from queue */
128                 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
129                 list_del(&buf->vb.queue);
130                 if (!list_empty(&q->queue))
131                         next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
132                 q->curr = buf;
133                 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
134                 buf->activate(dev,buf,next);
135         } else {
136                 DEB_INT(("no next buffer. stopping.\n"));
137                 if( 0 != vbi ) {
138                         /* turn off video-dma3 */
139                         saa7146_write(dev,MC1, MASK_20);
140                 } else {
141                         /* nothing to do -- just prevent next video-dma1 transfer
142                            by lowering the protection address */
143
144                         // fixme: fix this for vflip != 0
145
146                         saa7146_write(dev, PROT_ADDR1, 0);
147                         saa7146_write(dev, MC2, (MASK_02|MASK_18));             
148
149                         /* write the address of the rps-program */
150                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
151                         /* turn on rps */
152                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
153                                 
154 /*
155                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
156                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
157                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
158                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
159                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
160                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
161 */
162                 }
163                 del_timer(&q->timeout);
164         }
165 }
166
167 void saa7146_buffer_timeout(unsigned long data)
168 {
169         struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
170         struct saa7146_dev *dev = q->dev;
171         unsigned long flags;
172
173         DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
174
175         spin_lock_irqsave(&dev->slock,flags);
176         if (q->curr) {
177                 DEB_D(("timeout on %p\n", q->curr));
178                 saa7146_buffer_finish(dev,q,STATE_ERROR);
179         }
180
181         /* we don't restart the transfer here like other drivers do. when
182            a streaming capture is disabled, the timeout function will be
183            called for the current buffer. if we activate the next buffer now,
184            we mess up our capture logic. if a timeout occurs on another buffer,
185            then something is seriously broken before, so no need to buffer the
186            next capture IMHO... */
187 /*
188         saa7146_buffer_next(dev,q);
189 */
190         spin_unlock_irqrestore(&dev->slock,flags);
191 }
192
193 /********************************************************************************/
194 /* file operations */
195
196 static int fops_open(struct inode *inode, struct file *file)
197 {
198         unsigned int minor = iminor(inode);
199         struct saa7146_dev *h = NULL, *dev = NULL;
200         struct list_head *list;
201         struct saa7146_fh *fh = NULL;
202         int result = 0;
203
204         enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
205
206         DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
207
208         if (down_interruptible(&saa7146_devices_lock))
209                 return -ERESTARTSYS;
210
211         list_for_each(list,&saa7146_devices) {
212                 h = list_entry(list, struct saa7146_dev, item);
213                 if( NULL == h->vv_data ) {
214                         DEB_D(("device %p has not registered video devices.\n",h));
215                         continue;
216                 }
217                 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
218
219                 if (h->vv_data->video_minor == minor) {
220                         dev = h;
221                 }
222                 if (h->vv_data->vbi_minor == minor) {
223                         type = V4L2_BUF_TYPE_VBI_CAPTURE;
224                         dev = h;
225                 }
226         }
227         if (NULL == dev) {
228                 DEB_S(("no such video device.\n"));
229                 result = -ENODEV;
230                 goto out;
231         }
232
233         DEB_D(("using: %p\n",dev));
234
235         /* check if an extension is registered */
236         if( NULL == dev->ext ) {
237                 DEB_S(("no extension registered for this device.\n"));
238                 result = -ENODEV;
239                 goto out;
240         }
241
242         /* allocate per open data */
243         fh = kmalloc(sizeof(*fh),GFP_KERNEL);
244         if (NULL == fh) {
245                 DEB_S(("cannot allocate memory for per open data.\n"));
246                 result = -ENOMEM;
247                 goto out;
248         }
249         memset(fh,0,sizeof(*fh));
250         
251         file->private_data = fh;
252         fh->dev = dev;
253         fh->type = type;
254
255         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
256                 DEB_S(("initializing vbi...\n"));
257                 result = saa7146_vbi_uops.open(dev,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         up(&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 (down_interruptible(&saa7146_devices_lock))
290                 return -ERESTARTSYS;
291
292         if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
293                 saa7146_vbi_uops.release(dev,file);
294         } else {
295                 saa7146_video_uops.release(dev,file);
296         }
297
298         module_put(dev->ext->module);
299         file->private_data = NULL;
300         kfree(fh);
301
302         up(&saa7146_devices_lock);
303
304         return 0;
305 }
306
307 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg);
308 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
309 {
310 /*
311         DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
312 */
313         return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
314 }
315
316 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
317 {
318         struct saa7146_fh *fh = file->private_data;
319         struct videobuf_queue *q;
320
321         switch (fh->type) {
322         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
323                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
324                 q = &fh->video_q;
325                 break;
326                 }
327         case V4L2_BUF_TYPE_VBI_CAPTURE: {
328                 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
329                 q = &fh->vbi_q;
330                 break;
331                 }
332         default:
333                 BUG();
334                 return 0;
335         }
336         return videobuf_mmap_mapper(q,vma);
337 }
338
339 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
340 {
341         struct saa7146_fh *fh = file->private_data;
342         struct videobuf_buffer *buf = NULL;
343         struct videobuf_queue *q;
344
345         DEB_EE(("file:%p, poll:%p\n",file, wait));
346
347         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
348                 if( 0 == fh->vbi_q.streaming )
349                         return videobuf_poll_stream(file, &fh->vbi_q, wait);
350                 q = &fh->vbi_q;
351         } else {
352                 DEB_D(("using video queue.\n"));
353                 q = &fh->video_q;
354         }
355
356         if (!list_empty(&q->stream))
357                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
358
359         if (!buf) {
360                 DEB_D(("buf == NULL!\n"));
361                 return POLLERR;
362         }
363
364         poll_wait(file, &buf->done, wait);
365         if (buf->state == STATE_DONE || buf->state == STATE_ERROR) {
366                 DEB_D(("poll succeeded!\n"));
367                 return POLLIN|POLLRDNORM;
368         }
369
370         DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
371         return 0;
372 }
373
374 static ssize_t fops_read(struct file *file, 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 //              DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
381                 return saa7146_video_uops.read(file,data,count,ppos);
382                 }
383         case V4L2_BUF_TYPE_VBI_CAPTURE: {
384 //              DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
385                 return saa7146_vbi_uops.read(file,data,count,ppos);
386                 }
387                 break;
388         default:
389                 BUG();
390                 return 0;
391         }
392 }
393
394 static struct file_operations video_fops =
395 {
396         .owner          = THIS_MODULE,
397         .open           = fops_open,
398         .release        = fops_release,
399         .read           = fops_read,
400         .poll           = fops_poll,
401         .mmap           = fops_mmap,
402         .ioctl          = fops_ioctl,
403         .llseek         = no_llseek,
404 };
405
406 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
407 {
408         u32 isr = status;
409         
410         DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
411
412         if (0 != (isr & (MASK_27))) {
413                 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
414                 saa7146_video_uops.irq_done(dev,isr);
415         }
416
417         if (0 != (isr & (MASK_28))) {
418                 u32 mc2 = saa7146_read(dev, MC2);
419                 if( 0 != (mc2 & MASK_15)) {
420                         DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
421                         wake_up(&dev->vv_data->vbi_wq);
422                         saa7146_write(dev,MC2, MASK_31);
423                         return;
424                 }
425                 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
426                 saa7146_vbi_uops.irq_done(dev,isr);
427         }
428 }
429
430 static struct video_device device_template =
431 {
432         .hardware       = VID_HARDWARE_SAA7146,
433         .fops           = &video_fops,
434         .minor          = -1,
435 };
436
437 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
438 {
439         struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
440         if( NULL == vv ) {
441                 ERR(("out of memory. aborting.\n"));
442                 return -1;
443         }
444         memset(vv, 0x0, sizeof(*vv));
445
446         DEB_EE(("dev:%p\n",dev));
447
448         /* set default values for video parts of the saa7146 */
449         saa7146_write(dev, BCS_CTRL, 0x80400040);
450
451         /* enable video-port pins */
452         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
453
454         /* save per-device extension data (one extension can
455            handle different devices that might need different
456            configuration data) */
457         dev->ext_vv_data = ext_vv;
458         
459         vv->video_minor = -1;
460         vv->vbi_minor = -1;
461
462         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);     
463         if( NULL == vv->d_clipping.cpu_addr ) {
464                 ERR(("out of memory. aborting.\n"));
465                 kfree(vv);
466                 return -1;
467         }
468         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
469
470         saa7146_video_uops.init(dev,vv);
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
479 int saa7146_vv_release(struct saa7146_dev* dev)
480 {
481         struct saa7146_vv *vv = dev->vv_data;
482
483         DEB_EE(("dev:%p\n",dev));
484  
485         pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
486         kfree(vv);
487         dev->vv_data = NULL;
488         dev->vv_callback = NULL;
489         
490         return 0;
491 }
492
493 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
494                             char *name, int type)
495 {
496         struct saa7146_vv *vv = dev->vv_data;
497         struct video_device *vfd;
498
499         DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
500
501         // released by vfd->release
502         vfd = video_device_alloc();
503         if (vfd == NULL)
504                 return -ENOMEM;
505
506         memcpy(vfd, &device_template, sizeof(struct video_device));
507         strlcpy(vfd->name, name, sizeof(vfd->name));
508         vfd->release = video_device_release;
509         vfd->priv = dev;
510
511         // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
512         if (video_register_device(vfd, type, -1) < 0) {
513                 ERR(("cannot register v4l2 device. skipping.\n"));
514                 return -1;
515         }
516
517         if( VFL_TYPE_GRABBER == type ) {
518                 vv->video_minor = vfd->minor;
519                 INFO(("%s: registered device video%d [v4l2]\n",
520                         dev->name, vfd->minor & 0x1f));
521         } else {
522                 vv->vbi_minor = vfd->minor;
523                 INFO(("%s: registered device vbi%d [v4l2]\n",
524                         dev->name, vfd->minor & 0x1f));
525         }
526
527         *vid = vfd;
528         return 0;
529 }
530
531 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
532 {
533         struct saa7146_vv *vv = dev->vv_data;
534         
535         DEB_EE(("dev:%p\n",dev));
536
537         if( VFL_TYPE_GRABBER == (*vid)->type ) {
538                 vv->video_minor = -1;
539         } else {
540                 vv->vbi_minor = -1;
541         }
542
543         video_unregister_device(*vid);
544         *vid = NULL;
545
546         return 0;
547 }
548
549 static int __init saa7146_vv_init_module(void)
550 {
551         return 0;
552 }
553
554
555 static void __exit saa7146_vv_cleanup_module(void)
556 {
557 }
558
559 module_init(saa7146_vv_init_module);
560 module_exit(saa7146_vv_cleanup_module);
561
562 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
563 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
564 MODULE_LICENSE("GPL");