1 #include <media/saa7146_vv.h>
2 #include <linux/module.h>
4 /****************************************************************************/
5 /* resource management functions, shamelessly stolen from saa7134 driver */
7 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
9 struct saa7146_dev *dev = fh->dev;
10 struct saa7146_vv *vv = dev->vv_data;
12 if (fh->resources & bit) {
13 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
14 /* have it already allocated */
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 */
24 /* it's free, grab it */
27 DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
31 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
33 struct saa7146_dev *dev = fh->dev;
34 struct saa7146_vv *vv = dev->vv_data;
36 BUG_ON((fh->resources & bits) != bits);
38 fh->resources &= ~bits;
39 vv->resources &= ~bits;
40 DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
44 /********************************************************************************/
45 /* common dma functions */
47 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
48 struct saa7146_buf *buf)
50 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
51 DEB_EE(("dev:%p, buf:%p\n",dev,buf));
53 BUG_ON(in_interrupt());
55 videobuf_waiton(q, &buf->vb, 0, 0);
56 videobuf_dma_unmap(q->dev, dma);
57 videobuf_dma_free(dma);
58 buf->vb.state = VIDEOBUF_NEEDS_INIT;
62 /********************************************************************************/
63 /* common buffer functions */
65 int saa7146_buffer_queue(struct saa7146_dev *dev,
66 struct saa7146_dmaqueue *q,
67 struct saa7146_buf *buf)
69 assert_spin_locked(&dev->slock);
70 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
74 if (NULL == q->curr) {
76 DEB_D(("immediately activating buffer %p\n", buf));
77 buf->activate(dev,buf,NULL);
79 list_add_tail(&buf->vb.queue,&q->queue);
80 buf->vb.state = VIDEOBUF_QUEUED;
81 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
86 void saa7146_buffer_finish(struct saa7146_dev *dev,
87 struct saa7146_dmaqueue *q,
90 assert_spin_locked(&dev->slock);
91 DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
92 DEB_EE(("q->curr:%p\n",q->curr));
96 /* finish current buffer */
97 if (NULL == q->curr) {
98 DEB_D(("aiii. no current buffer\n"));
102 q->curr->vb.state = state;
103 do_gettimeofday(&q->curr->vb.ts);
104 wake_up(&q->curr->vb.done);
109 void saa7146_buffer_next(struct saa7146_dev *dev,
110 struct saa7146_dmaqueue *q, int vbi)
112 struct saa7146_buf *buf,*next = NULL;
116 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
118 assert_spin_locked(&dev->slock);
119 if (!list_empty(&q->queue)) {
120 /* activate next one from queue */
121 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
122 list_del(&buf->vb.queue);
123 if (!list_empty(&q->queue))
124 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
126 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
127 buf->activate(dev,buf,next);
129 DEB_INT(("no next buffer. stopping.\n"));
131 /* turn off video-dma3 */
132 saa7146_write(dev,MC1, MASK_20);
134 /* nothing to do -- just prevent next video-dma1 transfer
135 by lowering the protection address */
137 // fixme: fix this for vflip != 0
139 saa7146_write(dev, PROT_ADDR1, 0);
140 saa7146_write(dev, MC2, (MASK_02|MASK_18));
142 /* write the address of the rps-program */
143 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
145 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
148 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
149 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
150 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
151 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
152 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
153 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
156 del_timer(&q->timeout);
160 void saa7146_buffer_timeout(unsigned long data)
162 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
163 struct saa7146_dev *dev = q->dev;
166 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
168 spin_lock_irqsave(&dev->slock,flags);
170 DEB_D(("timeout on %p\n", q->curr));
171 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
174 /* we don't restart the transfer here like other drivers do. when
175 a streaming capture is disabled, the timeout function will be
176 called for the current buffer. if we activate the next buffer now,
177 we mess up our capture logic. if a timeout occurs on another buffer,
178 then something is seriously broken before, so no need to buffer the
179 next capture IMHO... */
181 saa7146_buffer_next(dev,q);
183 spin_unlock_irqrestore(&dev->slock,flags);
186 /********************************************************************************/
187 /* file operations */
189 static int fops_open(struct file *file)
191 struct video_device *vdev = video_devdata(file);
192 struct saa7146_dev *dev = video_drvdata(file);
193 struct saa7146_fh *fh = NULL;
196 enum v4l2_buf_type type;
198 DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
200 if (mutex_lock_interruptible(&saa7146_devices_lock))
203 DEB_D(("using: %p\n",dev));
205 type = vdev->vfl_type == VFL_TYPE_GRABBER
206 ? V4L2_BUF_TYPE_VIDEO_CAPTURE
207 : V4L2_BUF_TYPE_VBI_CAPTURE;
209 /* check if an extension is registered */
210 if( NULL == dev->ext ) {
211 DEB_S(("no extension registered for this device.\n"));
216 /* allocate per open data */
217 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
219 DEB_S(("cannot allocate memory for per open data.\n"));
224 file->private_data = fh;
228 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
229 DEB_S(("initializing vbi...\n"));
230 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
231 result = saa7146_vbi_uops.open(dev,file);
232 if (dev->ext_vv_data->vbi_fops.open)
233 dev->ext_vv_data->vbi_fops.open(file);
235 DEB_S(("initializing video...\n"));
236 result = saa7146_video_uops.open(dev,file);
243 if( 0 == try_module_get(dev->ext->module)) {
250 if (fh && result != 0) {
252 file->private_data = NULL;
254 mutex_unlock(&saa7146_devices_lock);
258 static int fops_release(struct file *file)
260 struct saa7146_fh *fh = file->private_data;
261 struct saa7146_dev *dev = fh->dev;
263 DEB_EE(("file:%p\n", file));
265 if (mutex_lock_interruptible(&saa7146_devices_lock))
268 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
269 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
270 saa7146_vbi_uops.release(dev,file);
271 if (dev->ext_vv_data->vbi_fops.release)
272 dev->ext_vv_data->vbi_fops.release(file);
274 saa7146_video_uops.release(dev,file);
277 module_put(dev->ext->module);
278 file->private_data = NULL;
281 mutex_unlock(&saa7146_devices_lock);
286 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
288 struct saa7146_fh *fh = file->private_data;
289 struct videobuf_queue *q;
292 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
293 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
297 case V4L2_BUF_TYPE_VBI_CAPTURE: {
298 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
307 return videobuf_mmap_mapper(q,vma);
310 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
312 struct saa7146_fh *fh = file->private_data;
313 struct videobuf_buffer *buf = NULL;
314 struct videobuf_queue *q;
316 DEB_EE(("file:%p, poll:%p\n",file, wait));
318 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
319 if( 0 == fh->vbi_q.streaming )
320 return videobuf_poll_stream(file, &fh->vbi_q, wait);
323 DEB_D(("using video queue.\n"));
327 if (!list_empty(&q->stream))
328 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
331 DEB_D(("buf == NULL!\n"));
335 poll_wait(file, &buf->done, wait);
336 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
337 DEB_D(("poll succeeded!\n"));
338 return POLLIN|POLLRDNORM;
341 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
345 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
347 struct saa7146_fh *fh = file->private_data;
350 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
351 // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
352 return saa7146_video_uops.read(file,data,count,ppos);
354 case V4L2_BUF_TYPE_VBI_CAPTURE: {
355 // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
356 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
357 return saa7146_vbi_uops.read(file,data,count,ppos);
368 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
370 struct saa7146_fh *fh = file->private_data;
373 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
375 case V4L2_BUF_TYPE_VBI_CAPTURE:
376 if (fh->dev->ext_vv_data->vbi_fops.write)
377 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
386 static const struct v4l2_file_operations video_fops =
388 .owner = THIS_MODULE,
390 .release = fops_release,
395 .unlocked_ioctl = video_ioctl2,
398 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
402 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
404 if (0 != (isr & (MASK_27))) {
405 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
406 saa7146_video_uops.irq_done(dev,isr);
409 if (0 != (isr & (MASK_28))) {
410 u32 mc2 = saa7146_read(dev, MC2);
411 if( 0 != (mc2 & MASK_15)) {
412 DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
413 wake_up(&dev->vv_data->vbi_wq);
414 saa7146_write(dev,MC2, MASK_31);
417 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
418 saa7146_vbi_uops.irq_done(dev,isr);
422 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
424 struct saa7146_vv *vv;
427 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
431 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
433 ERR(("out of memory. aborting.\n"));
436 ext_vv->ops = saa7146_video_ioctl_ops;
437 ext_vv->core_ops = &saa7146_video_ioctl_ops;
439 DEB_EE(("dev:%p\n",dev));
441 /* set default values for video parts of the saa7146 */
442 saa7146_write(dev, BCS_CTRL, 0x80400040);
444 /* enable video-port pins */
445 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
447 /* save per-device extension data (one extension can
448 handle different devices that might need different
449 configuration data) */
450 dev->ext_vv_data = ext_vv;
452 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
453 if( NULL == vv->d_clipping.cpu_addr ) {
454 ERR(("out of memory. aborting.\n"));
458 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
460 saa7146_video_uops.init(dev,vv);
461 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
462 saa7146_vbi_uops.init(dev,vv);
465 dev->vv_callback = &vv_callback;
469 EXPORT_SYMBOL_GPL(saa7146_vv_init);
471 int saa7146_vv_release(struct saa7146_dev* dev)
473 struct saa7146_vv *vv = dev->vv_data;
475 DEB_EE(("dev:%p\n",dev));
477 v4l2_device_unregister(&dev->v4l2_dev);
478 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
481 dev->vv_callback = NULL;
485 EXPORT_SYMBOL_GPL(saa7146_vv_release);
487 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
488 char *name, int type)
490 struct video_device *vfd;
494 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
496 // released by vfd->release
497 vfd = video_device_alloc();
501 vfd->fops = &video_fops;
502 vfd->ioctl_ops = &dev->ext_vv_data->ops;
503 vfd->release = video_device_release;
504 vfd->lock = &dev->v4l2_lock;
506 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
507 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
508 strlcpy(vfd->name, name, sizeof(vfd->name));
509 video_set_drvdata(vfd, dev);
511 err = video_register_device(vfd, type, -1);
513 ERR(("cannot register v4l2 device. skipping.\n"));
514 video_device_release(vfd);
518 INFO(("%s: registered device %s [v4l2]\n",
519 dev->name, video_device_node_name(vfd)));
524 EXPORT_SYMBOL_GPL(saa7146_register_device);
526 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
528 DEB_EE(("dev:%p\n",dev));
530 video_unregister_device(*vid);
535 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
537 static int __init saa7146_vv_init_module(void)
543 static void __exit saa7146_vv_cleanup_module(void)
547 module_init(saa7146_vv_init_module);
548 module_exit(saa7146_vv_cleanup_module);
550 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
551 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
552 MODULE_LICENSE("GPL");