1 files changed, 594 insertions, 0 deletions

diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
new file mode 100644
index 0000000..127b052
--- /dev/null
+++ b/drivers/media/common/saa7146_fops.c
@@ -0,0 +1,594 @@
+#include <media/saa7146_vv.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? */
+	mutex_lock(&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 */
+		mutex_unlock(&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));
+	mutex_unlock(&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;
+
+	BUG_ON((fh->resources & bits) != bits);
+
+	mutex_lock(&dev->lock);
+	fh->resources  &= ~bits;
+	vv->resources &= ~bits;
+	DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
+	mutex_unlock(&dev->lock);
+}
+
+
+/********************************************************************************/
+/* common dma functions */
+
+void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
+						struct saa7146_buf *buf)
+{
+	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+	DEB_EE(("dev:%p, buf:%p\n",dev,buf));
+
+	BUG_ON(in_interrupt());
+
+	videobuf_waiton(&buf->vb,0,0);
+	videobuf_dma_unmap(q, dma);
+	videobuf_dma_free(dma);
+	buf->vb.state = VIDEOBUF_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 = VIDEOBUF_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,VIDEOBUF_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 (mutex_lock_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 = kzalloc(sizeof(*fh),GFP_KERNEL);
+	if (NULL == fh) {
+		DEB_S(("cannot allocate memory for per open data.\n"));
+		result = -ENOMEM;
+		goto out;
+	}
+
+	file->private_data = fh;
+	fh->dev = dev;
+	fh->type = type;
+
+	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		DEB_S(("initializing vbi...\n"));
+		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+			result = saa7146_vbi_uops.open(dev,file);
+		if (dev->ext_vv_data->vbi_fops.open)
+			dev->ext_vv_data->vbi_fops.open(inode, 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 && result != 0) {
+		kfree(fh);
+		file->private_data = NULL;
+	}
+	mutex_unlock(&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 (mutex_lock_interruptible(&saa7146_devices_lock))
+		return -ERESTARTSYS;
+
+	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+			saa7146_vbi_uops.release(dev,file);
+		if (dev->ext_vv_data->vbi_fops.release)
+			dev->ext_vv_data->vbi_fops.release(inode, file);
+	} else {
+		saa7146_video_uops.release(dev,file);
+	}
+
+	module_put(dev->ext->module);
+	file->private_data = NULL;
+	kfree(fh);
+
+	mutex_unlock(&saa7146_devices_lock);
+
+	return 0;
+}
+
+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 == VIDEOBUF_DONE || buf->state == VIDEOBUF_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));
+		if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+			return saa7146_vbi_uops.read(file,data,count,ppos);
+		else
+			return -EINVAL;
+		}
+		break;
+	default:
+		BUG();
+		return 0;
+	}
+}
+
+static ssize_t fops_write(struct file *file, const 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:
+		return -EINVAL;
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+		if (fh->dev->ext_vv_data->vbi_fops.write)
+			return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
+		else
+			return -EINVAL;
+	default:
+		BUG();
+		return -EINVAL;
+	}
+}
+
+static const struct file_operations video_fops =
+{
+	.owner		= THIS_MODULE,
+	.open		= fops_open,
+	.release	= fops_release,
+	.read		= fops_read,
+	.write		= fops_write,
+	.poll		= fops_poll,
+	.mmap		= fops_mmap,
+	.ioctl		= fops_ioctl,
+	.llseek		= no_llseek,
+};
+
+static 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 =
+{
+	.fops		= &video_fops,
+	.minor		= -1,
+};
+
+int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
+{
+	struct saa7146_vv *vv = kzalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
+	if( NULL == vv ) {
+		ERR(("out of memory. aborting.\n"));
+		return -1;
+	}
+
+	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);
+	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+		saa7146_vbi_uops.init(dev,vv);
+
+	dev->vv_data = vv;
+	dev->vv_callback = &vv_callback;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_init);
+
+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_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
+	kfree(vv);
+	dev->vv_data = NULL;
+	dev->vv_callback = NULL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_release);
+
+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;
+	video_set_drvdata(vfd, 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"));
+		video_device_release(vfd);
+		return -1;
+	}
+
+	if( VFL_TYPE_GRABBER == type ) {
+		vv->video_minor = vfd->minor;
+		INFO(("%s: registered device video%d [v4l2]\n",
+			dev->name, vfd->num));
+	} else {
+		vv->vbi_minor = vfd->minor;
+		INFO(("%s: registered device vbi%d [v4l2]\n",
+			dev->name, vfd->num));
+	}
+
+	*vid = vfd;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_register_device);
+
+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 ((*vid)->vfl_type == VFL_TYPE_GRABBER) {
+		vv->video_minor = -1;
+	} else {
+		vv->vbi_minor = -1;
+	}
+
+	video_unregister_device(*vid);
+	*vid = NULL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_unregister_device);
+
+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");