diff options
Diffstat (limited to 'drivers/media/common/saa7146_fops.c')
| -rw-r--r-- | drivers/media/common/saa7146_fops.c | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c new file mode 100644 index 000000000000..cb826c9adfe7 --- /dev/null +++ b/drivers/media/common/saa7146_fops.c @@ -0,0 +1,564 @@ +#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"); |