| #include <media/saa7146_vv.h> |
| #include <linux/version.h> |
| |
| #define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1) |
| |
| /****************************************************************************/ |
| /* resource management functions, shamelessly stolen from saa7134 driver */ |
| |
| int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit) |
| { |
| struct saa7146_dev *dev = fh->dev; |
| struct saa7146_vv *vv = dev->vv_data; |
| |
| if (fh->resources & bit) { |
| DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources)); |
| /* have it already allocated */ |
| return 1; |
| } |
| |
| /* is it free? */ |
| down(&dev->lock); |
| if (vv->resources & bit) { |
| DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit)); |
| /* no, someone else uses it */ |
| up(&dev->lock); |
| return 0; |
| } |
| /* it's free, grab it */ |
| fh->resources |= bit; |
| vv->resources |= bit; |
| DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources)); |
| up(&dev->lock); |
| return 1; |
| } |
| |
| void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits) |
| { |
| struct saa7146_dev *dev = fh->dev; |
| struct saa7146_vv *vv = dev->vv_data; |
| |
| if ((fh->resources & bits) != bits) |
| BUG(); |
| |
| down(&dev->lock); |
| fh->resources &= ~bits; |
| vv->resources &= ~bits; |
| DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources)); |
| up(&dev->lock); |
| } |
| |
| |
| /********************************************************************************/ |
| /* common dma functions */ |
| |
| void saa7146_dma_free(struct saa7146_dev *dev,struct saa7146_buf *buf) |
| { |
| DEB_EE(("dev:%p, buf:%p\n",dev,buf)); |
| |
| if (in_interrupt()) |
| BUG(); |
| |
| videobuf_waiton(&buf->vb,0,0); |
| videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma); |
| videobuf_dma_free(&buf->vb.dma); |
| buf->vb.state = STATE_NEEDS_INIT; |
| } |
| |
| |
| /********************************************************************************/ |
| /* common buffer functions */ |
| |
| int saa7146_buffer_queue(struct saa7146_dev *dev, |
| struct saa7146_dmaqueue *q, |
| struct saa7146_buf *buf) |
| { |
| assert_spin_locked(&dev->slock); |
| DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf)); |
| |
| BUG_ON(!q); |
| |
| if (NULL == q->curr) { |
| q->curr = buf; |
| DEB_D(("immediately activating buffer %p\n", buf)); |
| buf->activate(dev,buf,NULL); |
| } else { |
| list_add_tail(&buf->vb.queue,&q->queue); |
| buf->vb.state = STATE_QUEUED; |
| DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf)); |
| } |
| return 0; |
| } |
| |
| void saa7146_buffer_finish(struct saa7146_dev *dev, |
| struct saa7146_dmaqueue *q, |
| int state) |
| { |
| assert_spin_locked(&dev->slock); |
| DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state)); |
| DEB_EE(("q->curr:%p\n",q->curr)); |
| |
| BUG_ON(!q->curr); |
| |
| /* finish current buffer */ |
| if (NULL == q->curr) { |
| DEB_D(("aiii. no current buffer\n")); |
| return; |
| } |
| |
| q->curr->vb.state = state; |
| do_gettimeofday(&q->curr->vb.ts); |
| wake_up(&q->curr->vb.done); |
| |
| q->curr = NULL; |
| } |
| |
| void saa7146_buffer_next(struct saa7146_dev *dev, |
| struct saa7146_dmaqueue *q, int vbi) |
| { |
| struct saa7146_buf *buf,*next = NULL; |
| |
| BUG_ON(!q); |
| |
| DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi)); |
| |
| assert_spin_locked(&dev->slock); |
| if (!list_empty(&q->queue)) { |
| /* activate next one from queue */ |
| buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue); |
| list_del(&buf->vb.queue); |
| if (!list_empty(&q->queue)) |
| next = list_entry(q->queue.next,struct saa7146_buf, vb.queue); |
| q->curr = buf; |
| DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next)); |
| buf->activate(dev,buf,next); |
| } else { |
| DEB_INT(("no next buffer. stopping.\n")); |
| if( 0 != vbi ) { |
| /* turn off video-dma3 */ |
| saa7146_write(dev,MC1, MASK_20); |
| } else { |
| /* nothing to do -- just prevent next video-dma1 transfer |
| by lowering the protection address */ |
| |
| // fixme: fix this for vflip != 0 |
| |
| saa7146_write(dev, PROT_ADDR1, 0); |
| saa7146_write(dev, MC2, (MASK_02|MASK_18)); |
| |
| /* write the address of the rps-program */ |
| saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle); |
| /* turn on rps */ |
| saa7146_write(dev, MC1, (MASK_12 | MASK_28)); |
| |
| /* |
| printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1)); |
| printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1)); |
| printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1)); |
| printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1)); |
| printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1)); |
| printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1)); |
| */ |
| } |
| del_timer(&q->timeout); |
| } |
| } |
| |
| void saa7146_buffer_timeout(unsigned long data) |
| { |
| struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data; |
| struct saa7146_dev *dev = q->dev; |
| unsigned long flags; |
| |
| DEB_EE(("dev:%p, dmaq:%p\n", dev, q)); |
| |
| spin_lock_irqsave(&dev->slock,flags); |
| if (q->curr) { |
| DEB_D(("timeout on %p\n", q->curr)); |
| saa7146_buffer_finish(dev,q,STATE_ERROR); |
| } |
| |
| /* we don't restart the transfer here like other drivers do. when |
| a streaming capture is disabled, the timeout function will be |
| called for the current buffer. if we activate the next buffer now, |
| we mess up our capture logic. if a timeout occurs on another buffer, |
| then something is seriously broken before, so no need to buffer the |
| next capture IMHO... */ |
| /* |
| saa7146_buffer_next(dev,q); |
| */ |
| spin_unlock_irqrestore(&dev->slock,flags); |
| } |
| |
| /********************************************************************************/ |
| /* file operations */ |
| |
| static int fops_open(struct inode *inode, struct file *file) |
| { |
| unsigned int minor = iminor(inode); |
| struct saa7146_dev *h = NULL, *dev = NULL; |
| struct list_head *list; |
| struct saa7146_fh *fh = NULL; |
| int result = 0; |
| |
| enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor)); |
| |
| if (down_interruptible(&saa7146_devices_lock)) |
| return -ERESTARTSYS; |
| |
| list_for_each(list,&saa7146_devices) { |
| h = list_entry(list, struct saa7146_dev, item); |
| if( NULL == h->vv_data ) { |
| DEB_D(("device %p has not registered video devices.\n",h)); |
| continue; |
| } |
| DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor)); |
| |
| if (h->vv_data->video_minor == minor) { |
| dev = h; |
| } |
| if (h->vv_data->vbi_minor == minor) { |
| type = V4L2_BUF_TYPE_VBI_CAPTURE; |
| dev = h; |
| } |
| } |
| if (NULL == dev) { |
| DEB_S(("no such video device.\n")); |
| result = -ENODEV; |
| goto out; |
| } |
| |
| DEB_D(("using: %p\n",dev)); |
| |
| /* check if an extension is registered */ |
| if( NULL == dev->ext ) { |
| DEB_S(("no extension registered for this device.\n")); |
| result = -ENODEV; |
| goto out; |
| } |
| |
| /* allocate per open data */ |
| fh = kmalloc(sizeof(*fh),GFP_KERNEL); |
| if (NULL == fh) { |
| DEB_S(("cannot allocate memory for per open data.\n")); |
| result = -ENOMEM; |
| goto out; |
| } |
| memset(fh,0,sizeof(*fh)); |
| |
| file->private_data = fh; |
| fh->dev = dev; |
| fh->type = type; |
| |
| if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { |
| DEB_S(("initializing vbi...\n")); |
| result = saa7146_vbi_uops.open(dev,file); |
| } else { |
| DEB_S(("initializing video...\n")); |
| result = saa7146_video_uops.open(dev,file); |
| } |
| |
| if (0 != result) { |
| goto out; |
| } |
| |
| if( 0 == try_module_get(dev->ext->module)) { |
| result = -EINVAL; |
| goto out; |
| } |
| |
| result = 0; |
| out: |
| if( fh != 0 && result != 0 ) { |
| kfree(fh); |
| file->private_data = NULL; |
| } |
| up(&saa7146_devices_lock); |
| return result; |
| } |
| |
| static int fops_release(struct inode *inode, struct file *file) |
| { |
| struct saa7146_fh *fh = file->private_data; |
| struct saa7146_dev *dev = fh->dev; |
| |
| DEB_EE(("inode:%p, file:%p\n",inode,file)); |
| |
| if (down_interruptible(&saa7146_devices_lock)) |
| return -ERESTARTSYS; |
| |
| if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { |
| saa7146_vbi_uops.release(dev,file); |
| } else { |
| saa7146_video_uops.release(dev,file); |
| } |
| |
| module_put(dev->ext->module); |
| file->private_data = NULL; |
| kfree(fh); |
| |
| up(&saa7146_devices_lock); |
| |
| return 0; |
| } |
| |
| int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg); |
| static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| /* |
| DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg)); |
| */ |
| return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl); |
| } |
| |
| static int fops_mmap(struct file *file, struct vm_area_struct * vma) |
| { |
| struct saa7146_fh *fh = file->private_data; |
| struct videobuf_queue *q; |
| |
| switch (fh->type) { |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: { |
| DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma)); |
| q = &fh->video_q; |
| break; |
| } |
| case V4L2_BUF_TYPE_VBI_CAPTURE: { |
| DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma)); |
| q = &fh->vbi_q; |
| break; |
| } |
| default: |
| BUG(); |
| return 0; |
| } |
| return videobuf_mmap_mapper(q,vma); |
| } |
| |
| static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait) |
| { |
| struct saa7146_fh *fh = file->private_data; |
| struct videobuf_buffer *buf = NULL; |
| struct videobuf_queue *q; |
| |
| DEB_EE(("file:%p, poll:%p\n",file, wait)); |
| |
| if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) { |
| if( 0 == fh->vbi_q.streaming ) |
| return videobuf_poll_stream(file, &fh->vbi_q, wait); |
| q = &fh->vbi_q; |
| } else { |
| DEB_D(("using video queue.\n")); |
| q = &fh->video_q; |
| } |
| |
| if (!list_empty(&q->stream)) |
| buf = list_entry(q->stream.next, struct videobuf_buffer, stream); |
| |
| if (!buf) { |
| DEB_D(("buf == NULL!\n")); |
| return POLLERR; |
| } |
| |
| poll_wait(file, &buf->done, wait); |
| if (buf->state == STATE_DONE || buf->state == STATE_ERROR) { |
| DEB_D(("poll succeeded!\n")); |
| return POLLIN|POLLRDNORM; |
| } |
| |
| DEB_D(("nothing to poll for, buf->state:%d\n",buf->state)); |
| return 0; |
| } |
| |
| static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) |
| { |
| struct saa7146_fh *fh = file->private_data; |
| |
| switch (fh->type) { |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: { |
| // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count)); |
| return saa7146_video_uops.read(file,data,count,ppos); |
| } |
| case V4L2_BUF_TYPE_VBI_CAPTURE: { |
| // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count)); |
| return saa7146_vbi_uops.read(file,data,count,ppos); |
| } |
| break; |
| default: |
| BUG(); |
| return 0; |
| } |
| } |
| |
| static struct file_operations video_fops = |
| { |
| .owner = THIS_MODULE, |
| .open = fops_open, |
| .release = fops_release, |
| .read = fops_read, |
| .poll = fops_poll, |
| .mmap = fops_mmap, |
| .ioctl = fops_ioctl, |
| .llseek = no_llseek, |
| }; |
| |
| void vv_callback(struct saa7146_dev *dev, unsigned long status) |
| { |
| u32 isr = status; |
| |
| DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status)); |
| |
| if (0 != (isr & (MASK_27))) { |
| DEB_INT(("irq: RPS0 (0x%08x).\n",isr)); |
| saa7146_video_uops.irq_done(dev,isr); |
| } |
| |
| if (0 != (isr & (MASK_28))) { |
| u32 mc2 = saa7146_read(dev, MC2); |
| if( 0 != (mc2 & MASK_15)) { |
| DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr)); |
| wake_up(&dev->vv_data->vbi_wq); |
| saa7146_write(dev,MC2, MASK_31); |
| return; |
| } |
| DEB_INT(("irq: RPS1 (0x%08x).\n",isr)); |
| saa7146_vbi_uops.irq_done(dev,isr); |
| } |
| } |
| |
| static struct video_device device_template = |
| { |
| .hardware = VID_HARDWARE_SAA7146, |
| .fops = &video_fops, |
| .minor = -1, |
| }; |
| |
| int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) |
| { |
| struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL); |
| if( NULL == vv ) { |
| ERR(("out of memory. aborting.\n")); |
| return -1; |
| } |
| memset(vv, 0x0, sizeof(*vv)); |
| |
| DEB_EE(("dev:%p\n",dev)); |
| |
| /* set default values for video parts of the saa7146 */ |
| saa7146_write(dev, BCS_CTRL, 0x80400040); |
| |
| /* enable video-port pins */ |
| saa7146_write(dev, MC1, (MASK_10 | MASK_26)); |
| |
| /* save per-device extension data (one extension can |
| handle different devices that might need different |
| configuration data) */ |
| dev->ext_vv_data = ext_vv; |
| |
| vv->video_minor = -1; |
| vv->vbi_minor = -1; |
| |
| vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle); |
| if( NULL == vv->d_clipping.cpu_addr ) { |
| ERR(("out of memory. aborting.\n")); |
| kfree(vv); |
| return -1; |
| } |
| memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM); |
| |
| saa7146_video_uops.init(dev,vv); |
| saa7146_vbi_uops.init(dev,vv); |
| |
| dev->vv_data = vv; |
| dev->vv_callback = &vv_callback; |
| |
| return 0; |
| } |
| |
| int saa7146_vv_release(struct saa7146_dev* dev) |
| { |
| struct saa7146_vv *vv = dev->vv_data; |
| |
| DEB_EE(("dev:%p\n",dev)); |
| |
| pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); |
| kfree(vv); |
| dev->vv_data = NULL; |
| dev->vv_callback = NULL; |
| |
| return 0; |
| } |
| |
| int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev, |
| char *name, int type) |
| { |
| struct saa7146_vv *vv = dev->vv_data; |
| struct video_device *vfd; |
| |
| DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type)); |
| |
| // released by vfd->release |
| vfd = video_device_alloc(); |
| if (vfd == NULL) |
| return -ENOMEM; |
| |
| memcpy(vfd, &device_template, sizeof(struct video_device)); |
| strlcpy(vfd->name, name, sizeof(vfd->name)); |
| vfd->release = video_device_release; |
| vfd->priv = dev; |
| |
| // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr"); |
| if (video_register_device(vfd, type, -1) < 0) { |
| ERR(("cannot register v4l2 device. skipping.\n")); |
| return -1; |
| } |
| |
| if( VFL_TYPE_GRABBER == type ) { |
| vv->video_minor = vfd->minor; |
| INFO(("%s: registered device video%d [v4l2]\n", |
| dev->name, vfd->minor & 0x1f)); |
| } else { |
| vv->vbi_minor = vfd->minor; |
| INFO(("%s: registered device vbi%d [v4l2]\n", |
| dev->name, vfd->minor & 0x1f)); |
| } |
| |
| *vid = vfd; |
| return 0; |
| } |
| |
| int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev) |
| { |
| struct saa7146_vv *vv = dev->vv_data; |
| |
| DEB_EE(("dev:%p\n",dev)); |
| |
| if( VFL_TYPE_GRABBER == (*vid)->type ) { |
| vv->video_minor = -1; |
| } else { |
| vv->vbi_minor = -1; |
| } |
| |
| video_unregister_device(*vid); |
| *vid = NULL; |
| |
| return 0; |
| } |
| |
| static int __init saa7146_vv_init_module(void) |
| { |
| return 0; |
| } |
| |
| |
| static void __exit saa7146_vv_cleanup_module(void) |
| { |
| } |
| |
| module_init(saa7146_vv_init_module); |
| module_exit(saa7146_vv_cleanup_module); |
| |
| MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); |
| MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); |
| MODULE_LICENSE("GPL"); |