1 #include <media/saa7146_vv.h>
3 /****************************************************************************/
4 /* resource management functions, shamelessly stolen from saa7134 driver */
6 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
8 struct saa7146_dev *dev = fh->dev;
9 struct saa7146_vv *vv = dev->vv_data;
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 */
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);
25 /* it's free, grab it */
28 DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
29 mutex_unlock(&dev->lock);
33 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
35 struct saa7146_dev *dev = fh->dev;
36 struct saa7146_vv *vv = dev->vv_data;
38 BUG_ON((fh->resources & bits) != bits);
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);
48 /********************************************************************************/
49 /* common dma functions */
51 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
52 struct saa7146_buf *buf)
54 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
55 DEB_EE(("dev:%p, buf:%p\n",dev,buf));
57 BUG_ON(in_interrupt());
59 videobuf_waiton(&buf->vb,0,0);
60 videobuf_dma_unmap(q->dev, dma);
61 videobuf_dma_free(dma);
62 buf->vb.state = VIDEOBUF_NEEDS_INIT;
66 /********************************************************************************/
67 /* common buffer functions */
69 int saa7146_buffer_queue(struct saa7146_dev *dev,
70 struct saa7146_dmaqueue *q,
71 struct saa7146_buf *buf)
73 assert_spin_locked(&dev->slock);
74 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
78 if (NULL == q->curr) {
80 DEB_D(("immediately activating buffer %p\n", buf));
81 buf->activate(dev,buf,NULL);
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));
90 void saa7146_buffer_finish(struct saa7146_dev *dev,
91 struct saa7146_dmaqueue *q,
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));
100 /* finish current buffer */
101 if (NULL == q->curr) {
102 DEB_D(("aiii. no current buffer\n"));
106 q->curr->vb.state = state;
107 do_gettimeofday(&q->curr->vb.ts);
108 wake_up(&q->curr->vb.done);
113 void saa7146_buffer_next(struct saa7146_dev *dev,
114 struct saa7146_dmaqueue *q, int vbi)
116 struct saa7146_buf *buf,*next = NULL;
120 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
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);
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);
133 DEB_INT(("no next buffer. stopping.\n"));
135 /* turn off video-dma3 */
136 saa7146_write(dev,MC1, MASK_20);
138 /* nothing to do -- just prevent next video-dma1 transfer
139 by lowering the protection address */
141 // fixme: fix this for vflip != 0
143 saa7146_write(dev, PROT_ADDR1, 0);
144 saa7146_write(dev, MC2, (MASK_02|MASK_18));
146 /* write the address of the rps-program */
147 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
149 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
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));
160 del_timer(&q->timeout);
164 void saa7146_buffer_timeout(unsigned long data)
166 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
167 struct saa7146_dev *dev = q->dev;
170 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
172 spin_lock_irqsave(&dev->slock,flags);
174 DEB_D(("timeout on %p\n", q->curr));
175 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
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... */
185 saa7146_buffer_next(dev,q);
187 spin_unlock_irqrestore(&dev->slock,flags);
190 /********************************************************************************/
191 /* file operations */
193 static int fops_open(struct file *file)
195 struct video_device *vdev = video_devdata(file);
196 struct saa7146_dev *dev = video_drvdata(file);
197 struct saa7146_fh *fh = NULL;
200 enum v4l2_buf_type type;
202 DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
204 if (mutex_lock_interruptible(&saa7146_devices_lock))
207 DEB_D(("using: %p\n",dev));
209 type = vdev->vfl_type == VFL_TYPE_GRABBER
210 ? V4L2_BUF_TYPE_VIDEO_CAPTURE
211 : V4L2_BUF_TYPE_VBI_CAPTURE;
213 /* check if an extension is registered */
214 if( NULL == dev->ext ) {
215 DEB_S(("no extension registered for this device.\n"));
220 /* allocate per open data */
221 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
223 DEB_S(("cannot allocate memory for per open data.\n"));
228 file->private_data = fh;
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);
239 DEB_S(("initializing video...\n"));
240 result = saa7146_video_uops.open(dev,file);
247 if( 0 == try_module_get(dev->ext->module)) {
254 if (fh && result != 0) {
256 file->private_data = NULL;
258 mutex_unlock(&saa7146_devices_lock);
262 static int fops_release(struct file *file)
264 struct saa7146_fh *fh = file->private_data;
265 struct saa7146_dev *dev = fh->dev;
267 DEB_EE(("file:%p\n", file));
269 if (mutex_lock_interruptible(&saa7146_devices_lock))
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);
278 saa7146_video_uops.release(dev,file);
281 module_put(dev->ext->module);
282 file->private_data = NULL;
285 mutex_unlock(&saa7146_devices_lock);
290 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
292 struct saa7146_fh *fh = file->private_data;
293 struct videobuf_queue *q;
296 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
297 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
301 case V4L2_BUF_TYPE_VBI_CAPTURE: {
302 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
311 return videobuf_mmap_mapper(q,vma);
314 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
316 struct saa7146_fh *fh = file->private_data;
317 struct videobuf_buffer *buf = NULL;
318 struct videobuf_queue *q;
320 DEB_EE(("file:%p, poll:%p\n",file, wait));
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);
327 DEB_D(("using video queue.\n"));
331 if (!list_empty(&q->stream))
332 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
335 DEB_D(("buf == NULL!\n"));
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;
345 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
349 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
351 struct saa7146_fh *fh = file->private_data;
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);
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);
372 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
374 struct saa7146_fh *fh = file->private_data;
377 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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);
390 static const struct v4l2_file_operations video_fops =
392 .owner = THIS_MODULE,
394 .release = fops_release,
399 .ioctl = video_ioctl2,
402 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
406 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
408 if (0 != (isr & (MASK_27))) {
409 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
410 saa7146_video_uops.irq_done(dev,isr);
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);
421 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
422 saa7146_vbi_uops.irq_done(dev,isr);
426 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
428 struct saa7146_vv *vv;
431 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
435 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
437 ERR(("out of memory. aborting.\n"));
440 ext_vv->ops = saa7146_video_ioctl_ops;
441 ext_vv->core_ops = &saa7146_video_ioctl_ops;
443 DEB_EE(("dev:%p\n",dev));
445 /* set default values for video parts of the saa7146 */
446 saa7146_write(dev, BCS_CTRL, 0x80400040);
448 /* enable video-port pins */
449 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
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;
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"));
462 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
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);
469 dev->vv_callback = &vv_callback;
473 EXPORT_SYMBOL_GPL(saa7146_vv_init);
475 int saa7146_vv_release(struct saa7146_dev* dev)
477 struct saa7146_vv *vv = dev->vv_data;
479 DEB_EE(("dev:%p\n",dev));
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);
485 dev->vv_callback = NULL;
489 EXPORT_SYMBOL_GPL(saa7146_vv_release);
491 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
492 char *name, int type)
494 struct video_device *vfd;
498 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
500 // released by vfd->release
501 vfd = video_device_alloc();
505 vfd->fops = &video_fops;
506 vfd->ioctl_ops = &dev->ext_vv_data->ops;
507 vfd->release = video_device_release;
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);
514 err = video_register_device(vfd, type, -1);
516 ERR(("cannot register v4l2 device. skipping.\n"));
517 video_device_release(vfd);
521 INFO(("%s: registered device %s [v4l2]\n",
522 dev->name, video_device_node_name(vfd)));
527 EXPORT_SYMBOL_GPL(saa7146_register_device);
529 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
531 DEB_EE(("dev:%p\n",dev));
533 video_unregister_device(*vid);
538 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
540 static int __init saa7146_vv_init_module(void)
546 static void __exit saa7146_vv_cleanup_module(void)
550 module_init(saa7146_vv_init_module);
551 module_exit(saa7146_vv_cleanup_module);
553 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
554 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
555 MODULE_LICENSE("GPL");