text: // SPDX-License-Identifier: GPL-2.0-or-later
  /*
   * Auvitek AU0828 USB Bridge (Analog video support)
   *
   * Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
   * Copyright (C) 2005-2008 Auvitek International, Ltd.
   */
  
  /* Developer Notes:
   *
   * The hardware scaler supported is unimplemented
   * AC97 audio support is unimplemented (only i2s audio mode)
   *
   */
  
  #include "au0828.h"
  #include "au8522.h"
  
  #include <linux/module.h>
  #include <linux/slab.h>
  #include <linux/init.h>
  #include <linux/device.h>
  #include <media/v4l2-common.h>
  #include <media/v4l2-mc.h>
  #include <media/v4l2-ioctl.h>
  #include <media/v4l2-event.h>
  #include <media/tuner.h>
  #include "au0828-reg.h"
  
  static DEFINE_MUTEX(au0828_sysfs_lock);
  
  /* ------------------------------------------------------------------
  	Videobuf operations
     ------------------------------------------------------------------*/
  
  static unsigned int isoc_debug;
  module_param(isoc_debug, int, 0644);
  MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  
  #define au0828_isocdbg(fmt, arg...) \
  do {\
  	if (isoc_debug) { \
  		pr_info("au0828 %s :"fmt, \
  		       __func__ , ##arg);	   \
  	} \
    } while (0)
  
  static inline void i2c_gate_ctrl(struct au0828_dev *dev, int val)
  {
  	if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
  		dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, val);
  }
  
  static inline void print_err_status(struct au0828_dev *dev,
  				    int packet, int status)
  {
  	char *errmsg = "Unknown";
  
  	switch (status) {
  	case -ENOENT:
  		errmsg = "unlinked synchronously";
  		break;
  	case -ECONNRESET:
  		errmsg = "unlinked asynchronously";
  		break;
  	case -ENOSR:
  		errmsg = "Buffer error (overrun)";
  		break;
  	case -EPIPE:
  		errmsg = "Stalled (device not responding)";
  		break;
  	case -EOVERFLOW:
  		errmsg = "Babble (bad cable?)";
  		break;
  	case -EPROTO:
  		errmsg = "Bit-stuff error (bad cable?)";
  		break;
  	case -EILSEQ:
  		errmsg = "CRC/Timeout (could be anything)";
  		break;
  	case -ETIME:
  		errmsg = "Device does not respond";
  		break;
  	}
  	if (packet < 0) {
  		au0828_isocdbg("URB status %d [%s].\n",	status, errmsg);
  	} else {
  		au0828_isocdbg("URB packet %d, status %d [%s].\n",
  			       packet, status, errmsg);
  	}
  }
  
  static int check_dev(struct au0828_dev *dev)
  {
  	if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
  		pr_info("v4l2 ioctl: device not present\n");
  		return -ENODEV;
  	}
  
  	if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
  		pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
  		return -EIO;
  	}
  	return 0;
  }
  
  /*
   * IRQ callback, called by URB callback
   */
  static void au0828_irq_callback(struct urb *urb)
  {
  	struct au0828_dmaqueue  *dma_q = urb->context;
  	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
  	unsigned long flags = 0;
  	int i;
  
  	switch (urb->status) {
  	case 0:             /* success */
  	case -ETIMEDOUT:    /* NAK */
  		break;
  	case -ECONNRESET:   /* kill */
  	case -ENOENT:
  	case -ESHUTDOWN:
  		au0828_isocdbg("au0828_irq_callback called: status kill\n");
  		return;
  	default:            /* unknown error */
  		au0828_isocdbg("urb completion error %d.\n", urb->status);
  		break;
  	}
  
  	/* Copy data from URB */
  	spin_lock_irqsave(&dev->slock, flags);
  	dev->isoc_ctl.isoc_copy(dev, urb);
  	spin_unlock_irqrestore(&dev->slock, flags);
  
  	/* Reset urb buffers */
  	for (i = 0; i < urb->number_of_packets; i++) {
  		urb->iso_frame_desc[i].status = 0;
  		urb->iso_frame_desc[i].actual_length = 0;
  	}
  	urb->status = 0;
  
  	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
  	if (urb->status) {
  		au0828_isocdbg("urb resubmit failed (error=%i)\n",
  			       urb->status);
  	}
  	dev->stream_state = STREAM_ON;
  }
  
  /*
   * Stop and Deallocate URBs
   */
  static void au0828_uninit_isoc(struct au0828_dev *dev)
  {
  	struct urb *urb;
  	int i;
  
  	au0828_isocdbg("au0828: called au0828_uninit_isoc\n");
  
  	dev->isoc_ctl.nfields = -1;
  	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
  		urb = dev->isoc_ctl.urb[i];
  		if (urb) {
  			if (!irqs_disabled())
  				usb_kill_urb(urb);
  			else
  				usb_unlink_urb(urb);
  
  			if (dev->isoc_ctl.transfer_buffer[i]) {
  				usb_free_coherent(dev->usbdev,
  					urb->transfer_buffer_length,
  					dev->isoc_ctl.transfer_buffer[i],
  					urb->transfer_dma);
  			}
  			usb_free_urb(urb);
  			dev->isoc_ctl.urb[i] = NULL;
  		}
  		dev->isoc_ctl.transfer_buffer[i] = NULL;
  	}
  
  	kfree(dev->isoc_ctl.urb);
  	kfree(dev->isoc_ctl.transfer_buffer);
  
  	dev->isoc_ctl.urb = NULL;
  	dev->isoc_ctl.transfer_buffer = NULL;
  	dev->isoc_ctl.num_bufs = 0;
  
  	dev->stream_state = STREAM_OFF;
  }
  
  /*
   * Allocate URBs and start IRQ
   */
  static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
  			    int num_bufs, int max_pkt_size,
  			    int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
  {
  	struct au0828_dmaqueue *dma_q = &dev->vidq;
  	int i;
  	int sb_size, pipe;
  	struct urb *urb;
  	int j, k;
  	int rc;
  
  	au0828_isocdbg("au0828: called au0828_prepare_isoc\n");
  
  	dev->isoc_ctl.isoc_copy = isoc_copy;
  	dev->isoc_ctl.num_bufs = num_bufs;
  
  	dev->isoc_ctl.urb = kcalloc(num_bufs, sizeof(void *),  GFP_KERNEL);
  	if (!dev->isoc_ctl.urb) {
  		au0828_isocdbg("cannot alloc memory for usb buffers\n");
  		return -ENOMEM;
  	}
  
  	dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs, sizeof(void *),
  						GFP_KERNEL);
  	if (!dev->isoc_ctl.transfer_buffer) {
  		au0828_isocdbg("cannot allocate memory for usb transfer\n");
  		kfree(dev->isoc_ctl.urb);
  		return -ENOMEM;
  	}
  
  	dev->isoc_ctl.max_pkt_size = max_pkt_size;
  	dev->isoc_ctl.buf = NULL;
  
  	sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
  
  	/* allocate urbs and transfer buffers */
  	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
  		urb = usb_alloc_urb(max_packets, GFP_KERNEL);
  		if (!urb) {
  			au0828_uninit_isoc(dev);
  			return -ENOMEM;
  		}
  		dev->isoc_ctl.urb[i] = urb;
  
  		dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
  			sb_size, GFP_KERNEL, &urb->transfer_dma);
  		if (!dev->isoc_ctl.transfer_buffer[i]) {
  			printk("unable to allocate %i bytes for transfer buffer %i%s\n",
  					sb_size, i,
  					in_interrupt() ? " while in int" : "");
  			au0828_uninit_isoc(dev);
  			return -ENOMEM;
  		}
  		memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
  
  		pipe = usb_rcvisocpipe(dev->usbdev,
  				       dev->isoc_in_endpointaddr),
  
  		usb_fill_int_urb(urb, dev->usbdev, pipe,
  				 dev->isoc_ctl.transfer_buffer[i], sb_size,
  				 au0828_irq_callback, dma_q, 1);
  
  		urb->number_of_packets = max_packets;
  		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
  
  		k = 0;
  		for (j = 0; j < max_packets; j++) {
  			urb->iso_frame_desc[j].offset = k;
  			urb->iso_frame_desc[j].length =
  						dev->isoc_ctl.max_pkt_size;
  			k += dev->isoc_ctl.max_pkt_size;
  		}
  	}
  
  	/* submit urbs and enables IRQ */
  	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
  		rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
  		if (rc) {
  			au0828_isocdbg("submit of urb %i failed (error=%i)\n",
  				       i, rc);
  			au0828_uninit_isoc(dev);
  			return rc;
  		}
  	}
  
  	return 0;
  }
  
  /*
   * Announces that a buffer were filled and request the next
   */
  static inline void buffer_filled(struct au0828_dev *dev,
  				 struct au0828_dmaqueue *dma_q,
  				 struct au0828_buffer *buf)
  {
  	struct vb2_v4l2_buffer *vb = &buf->vb;
  	struct vb2_queue *q = vb->vb2_buf.vb2_queue;
  
  	/* Advice that buffer was filled */
  	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
  
  	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
  		vb->sequence = dev->frame_count++;
  	else
  		vb->sequence = dev->vbi_frame_count++;
  
  	vb->field = V4L2_FIELD_INTERLACED;
  	vb->vb2_buf.timestamp = ktime_get_ns();
  	vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
  }
  
  /*
   * Identify the buffer header type and properly handles
   */
  static void au0828_copy_video(struct au0828_dev *dev,
  			      struct au0828_dmaqueue  *dma_q,
  			      struct au0828_buffer *buf,
  			      unsigned char *p,
  			      unsigned char *outp, unsigned long len)
  {
  	void *fieldstart, *startwrite, *startread;
  	int  linesdone, currlinedone, offset, lencopy, remain;
  	int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
  
  	if (len == 0)
  		return;
  
  	if (dma_q->pos + len > buf->length)
  		len = buf->length - dma_q->pos;
  
  	startread = p;
  	remain = len;
  
  	/* Interlaces frame */
  	if (buf->top_field)
  		fieldstart = outp;
  	else
  		fieldstart = outp + bytesperline;
  
  	linesdone = dma_q->pos / bytesperline;
  	currlinedone = dma_q->pos % bytesperline;
  	offset = linesdone * bytesperline * 2 + currlinedone;
  	startwrite = fieldstart + offset;
  	lencopy = bytesperline - currlinedone;
  	lencopy = lencopy > remain ? remain : lencopy;
  
  	if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
  		au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
  			       ((char *)startwrite + lencopy) -
  			       ((char *)outp + buf->length));
  		remain = (char *)outp + buf->length - (char *)startwrite;
  		lencopy = remain;
  	}
  	if (lencopy <= 0)
  		return;
  	memcpy(startwrite, startread, lencopy);
  
  	remain -= lencopy;
  
  	while (remain > 0) {
  		startwrite += lencopy + bytesperline;
  		startread += lencopy;
  		if (bytesperline > remain)
  			lencopy = remain;
  		else
  			lencopy = bytesperline;
  
  		if ((char *)startwrite + lencopy > (char *)outp +
  		    buf->length) {
  			au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
  				       ((char *)startwrite + lencopy) -
  				       ((char *)outp + buf->length));
  			lencopy = remain = (char *)outp + buf->length -
  					   (char *)startwrite;
  		}
  		if (lencopy <= 0)
  			break;
  
  		memcpy(startwrite, startread, lencopy);
  
  		remain -= lencopy;
  	}
  
  	if (offset > 1440) {
  		/* We have enough data to check for greenscreen */
  		if (outp[0] < 0x60 && outp[1440] < 0x60)
  			dev->greenscreen_detected = 1;
  	}
  
  	dma_q->pos += len;
  }
  
  /*
   * video-buf generic routine to get the next available buffer
   */
  static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
  				struct au0828_buffer **buf)
  {
  	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
  
  	if (list_empty(&dma_q->active)) {
  		au0828_isocdbg("No active queue to serve\n");
  		dev->isoc_ctl.buf = NULL;
  		*buf = NULL;
  		return;
  	}
  
  	/* Get the next buffer */
  	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
  	/* Cleans up buffer - Useful for testing for frame/URB loss */
  	list_del(&(*buf)->list);
  	dma_q->pos = 0;
  	(*buf)->vb_buf = (*buf)->mem;
  	dev->isoc_ctl.buf = *buf;
  
  	return;
  }
  
  static void au0828_copy_vbi(struct au0828_dev *dev,
  			      struct au0828_dmaqueue  *dma_q,
  			      struct au0828_buffer *buf,
  			      unsigned char *p,
  			      unsigned char *outp, unsigned long len)
  {
  	unsigned char *startwrite, *startread;
  	int bytesperline;
  	int i, j = 0;
  
  	if (dev == NULL) {
  		au0828_isocdbg("dev is null\n");
  		return;
  	}
  
  	if (dma_q == NULL) {
  		au0828_isocdbg("dma_q is null\n");
  		return;
  	}
  	if (buf == NULL)
  		return;
  	if (p == NULL) {
  		au0828_isocdbg("p is null\n");
  		return;
  	}
  	if (outp == NULL) {
  		au0828_isocdbg("outp is null\n");
  		return;
  	}
  
  	bytesperline = dev->vbi_width;
  
  	if (dma_q->pos + len > buf->length)
  		len = buf->length - dma_q->pos;
  
  	startread = p;
  	startwrite = outp + (dma_q->pos / 2);
  
  	/* Make sure the bottom field populates the second half of the frame */
  	if (buf->top_field == 0)
  		startwrite += bytesperline * dev->vbi_height;
  
  	for (i = 0; i < len; i += 2)
  		startwrite[j++] = startread[i+1];
  
  	dma_q->pos += len;
  }
  
  
  /*
   * video-buf generic routine to get the next available VBI buffer
   */
  static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
  				    struct au0828_buffer **buf)
  {
  	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
  
  	if (list_empty(&dma_q->active)) {
  		au0828_isocdbg("No active queue to serve\n");
  		dev->isoc_ctl.vbi_buf = NULL;
  		*buf = NULL;
  		return;
  	}
  
  	/* Get the next buffer */
  	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
  	/* Cleans up buffer - Useful for testing for frame/URB loss */
  	list_del(&(*buf)->list);
  	dma_q->pos = 0;
  	(*buf)->vb_buf = (*buf)->mem;
  	dev->isoc_ctl.vbi_buf = *buf;
  	return;
  }
  
  /*
   * Controls the isoc copy of each urb packet
   */
  static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
  {
  	struct au0828_buffer    *buf;
  	struct au0828_buffer    *vbi_buf;
  	struct au0828_dmaqueue  *dma_q = urb->context;
  	struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
  	unsigned char *outp = NULL;
  	unsigned char *vbioutp = NULL;
  	int i, len = 0, rc = 1;
  	unsigned char *p;
  	unsigned char fbyte;
  	unsigned int vbi_field_size;
  	unsigned int remain, lencopy;
  
  	if (!dev)
  		return 0;
  
  	if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
  	    test_bit(DEV_MISCONFIGURED, &dev->dev_state))
  		return 0;
  
  	if (urb->status < 0) {
  		print_err_status(dev, -1, urb->status);
  		if (urb->status == -ENOENT)
  			return 0;
  	}
  
  	buf = dev->isoc_ctl.buf;
  	if (buf != NULL)
  		outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
  
  	vbi_buf = dev->isoc_ctl.vbi_buf;
  	if (vbi_buf != NULL)
  		vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);
  
  	for (i = 0; i < urb->number_of_packets; i++) {
  		int status = urb->iso_frame_desc[i].status;
  
  		if (status < 0) {
  			print_err_status(dev, i, status);
  			if (urb->iso_frame_desc[i].status != -EPROTO)
  				continue;
  		}
  
  		if (urb->iso_frame_desc[i].actual_length <= 0)
  			continue;
  
  		if (urb->iso_frame_desc[i].actual_length >
  						dev->max_pkt_size) {
  			au0828_isocdbg("packet bigger than packet size");
  			continue;
  		}
  
  		p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
  		fbyte = p[0];
  		len = urb->iso_frame_desc[i].actual_length - 4;
  		p += 4;
  
  		if (fbyte & 0x80) {
  			len -= 4;
  			p += 4;
  			au0828_isocdbg("Video frame %s\n",
  				       (fbyte & 0x40) ? "odd" : "even");
  			if (fbyte & 0x40) {
  				/* VBI */
  				if (vbi_buf != NULL)
  					buffer_filled(dev, vbi_dma_q, vbi_buf);
  				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
  				if (vbi_buf == NULL)
  					vbioutp = NULL;
  				else
  					vbioutp = vb2_plane_vaddr(
  						&vbi_buf->vb.vb2_buf, 0);
  
  				/* Video */
  				if (buf != NULL)
  					buffer_filled(dev, dma_q, buf);
  				get_next_buf(dma_q, &buf);
  				if (buf == NULL)
  					outp = NULL;
  				else
  					outp = vb2_plane_vaddr(
  						&buf->vb.vb2_buf, 0);
  
  				/* As long as isoc traffic is arriving, keep
  				   resetting the timer */
  				if (dev->vid_timeout_running)
  					mod_timer(&dev->vid_timeout,
  						  jiffies + (HZ / 10));
  				if (dev->vbi_timeout_running)
  					mod_timer(&dev->vbi_timeout,
  						  jiffies + (HZ / 10));
  			}
  
  			if (buf != NULL) {
  				if (fbyte & 0x40)
  					buf->top_field = 1;
  				else
  					buf->top_field = 0;
  			}
  
  			if (vbi_buf != NULL) {
  				if (fbyte & 0x40)
  					vbi_buf->top_field = 1;
  				else
  					vbi_buf->top_field = 0;
  			}
  
  			dev->vbi_read = 0;
  			vbi_dma_q->pos = 0;
  			dma_q->pos = 0;
  		}
  
  		vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
  		if (dev->vbi_read < vbi_field_size) {
  			remain  = vbi_field_size - dev->vbi_read;
  			if (len < remain)
  				lencopy = len;
  			else
  				lencopy = remain;
  
  			if (vbi_buf != NULL)
  				au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
  						vbioutp, len);
  
  			len -= lencopy;
  			p += lencopy;
  			dev->vbi_read += lencopy;
  		}
  
  		if (dev->vbi_read >= vbi_field_size && buf != NULL)
  			au0828_copy_video(dev, dma_q, buf, p, outp, len);
  	}
  	return rc;
  }
  
  void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
  {
  #ifdef CONFIG_MEDIA_CONTROLLER
  	int i;
  
  	for (i = 0; i < AU0828_MAX_INPUT; i++) {
  		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
  			return;
  		media_device_unregister_entity(&dev->input_ent[i]);
  	}
  #endif
  }
  
  static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
  {
  	struct au0828_dev *dev =
  		container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
  
  	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
  	v4l2_device_unregister(&dev->v4l2_dev);
  	au0828_usb_v4l2_media_release(dev);
  	au0828_usb_release(dev);
  }
  
  int au0828_v4l2_device_register(struct usb_interface *interface,
  				struct au0828_dev *dev)
  {
  	int retval;
  
  	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
  		return 0;
  
  	/* Create the v4l2_device */
  #ifdef CONFIG_MEDIA_CONTROLLER
  	dev->v4l2_dev.mdev = dev->media_dev;
  #endif
  	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
  	if (retval) {
  		pr_err("%s() v4l2_device_register failed\n",
  		       __func__);
  		return retval;
  	}
  
  	dev->v4l2_dev.release = au0828_usb_v4l2_release;
  
  	/* This control handler will inherit the controls from au8522 */
  	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
  	if (retval) {
  		pr_err("%s() v4l2_ctrl_handler_init failed\n",
  		       __func__);
  		return retval;
  	}
  	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
  
  	return 0;
  }
  
  static int queue_setup(struct vb2_queue *vq,
  		       unsigned int *nbuffers, unsigned int *nplanes,
  		       unsigned int sizes[], struct device *alloc_devs[])
  {
  	struct au0828_dev *dev = vb2_get_drv_priv(vq);
  	unsigned long size = dev->height * dev->bytesperline;
  
  	if (*nplanes)
  		return sizes[0] < size ? -EINVAL : 0;
  	*nplanes = 1;
  	sizes[0] = size;
  	return 0;
  }
  
  static int
  buffer_prepare(struct vb2_buffer *vb)
  {
  	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  	struct au0828_buffer *buf = container_of(vbuf,
  				struct au0828_buffer, vb);
  	struct au0828_dev    *dev = vb2_get_drv_priv(vb->vb2_queue);
  
  	buf->length = dev->height * dev->bytesperline;
  
  	if (vb2_plane_size(vb, 0) < buf->length) {
  		pr_err("%s data will not fit into plane (%lu < %lu)\n",
  			__func__, vb2_plane_size(vb, 0), buf->length);
  		return -EINVAL;
  	}
  	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
  	return 0;
  }
  
  static void
  buffer_queue(struct vb2_buffer *vb)
  {
  	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  	struct au0828_buffer    *buf     = container_of(vbuf,
  							struct au0828_buffer,
  							vb);
  	struct au0828_dev       *dev     = vb2_get_drv_priv(vb->vb2_queue);
  	struct au0828_dmaqueue  *vidq    = &dev->vidq;
  	unsigned long flags = 0;
  
  	buf->mem = vb2_plane_vaddr(vb, 0);
  	buf->length = vb2_plane_size(vb, 0);
  
  	spin_lock_irqsave(&dev->slock, flags);
  	list_add_tail(&buf->list, &vidq->active);
  	spin_unlock_irqrestore(&dev->slock, flags);
  }
  
  static int au0828_i2s_init(struct au0828_dev *dev)
  {
  	/* Enable i2s mode */
  	au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
  	return 0;
  }
  
  /*
   * Auvitek au0828 analog stream enable
   */
  static int au0828_analog_stream_enable(struct au0828_dev *d)
  {
  	struct usb_interface *iface;
  	int ret, h, w;
  
  	dprintk(1, "au0828_analog_stream_enable called\n");
  
  	if (test_bit(DEV_DISCONNECTED, &d->dev_state))
  		return -ENODEV;
  
  	iface = usb_ifnum_to_if(d->usbdev, 0);
  	if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
  		dprintk(1, "Changing intf#0 to alt 5\n");
  		/* set au0828 interface0 to AS5 here again */
  		ret = usb_set_interface(d->usbdev, 0, 5);
  		if (ret < 0) {
  			pr_info("Au0828 can't set alt setting to 5!\n");
  			return -EBUSY;
  		}
  	}
  
  	h = d->height / 2 + 2;
  	w = d->width * 2;
  
  	au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
  	au0828_writereg(d, 0x106, 0x00);
  	/* set x position */
  	au0828_writereg(d, 0x110, 0x00);
  	au0828_writereg(d, 0x111, 0x00);
  	au0828_writereg(d, 0x114, w & 0xff);
  	au0828_writereg(d, 0x115, w >> 8);
  	/* set y position */
  	au0828_writereg(d, 0x112, 0x00);
  	au0828_writereg(d, 0x113, 0x00);
  	au0828_writereg(d, 0x116, h & 0xff);
  	au0828_writereg(d, 0x117, h >> 8);
  	au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
  
  	return 0;
  }
  
  static int au0828_analog_stream_disable(struct au0828_dev *d)
  {
  	dprintk(1, "au0828_analog_stream_disable called\n");
  	au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
  	return 0;
  }
  
  static void au0828_analog_stream_reset(struct au0828_dev *dev)
  {
  	dprintk(1, "au0828_analog_stream_reset called\n");
  	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
  	mdelay(30);
  	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
  }
  
  /*
   * Some operations needs to stop current streaming
   */
  static int au0828_stream_interrupt(struct au0828_dev *dev)
  {
  	dev->stream_state = STREAM_INTERRUPT;
  	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
  		return -ENODEV;
  	return 0;
  }
  
  int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
  {
  	struct au0828_dev *dev = vb2_get_drv_priv(vq);
  	int rc = 0;
  
  	dprintk(1, "au0828_start_analog_streaming called %d\n",
  		dev->streaming_users);
  
  	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
  		dev->frame_count = 0;
  	else
  		dev->vbi_frame_count = 0;
  
  	if (dev->streaming_users == 0) {
  		/* If we were doing ac97 instead of i2s, it would go here...*/
  		au0828_i2s_init(dev);
  		rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
  				   AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
  				   au0828_isoc_copy);
  		if (rc < 0) {
  			pr_info("au0828_init_isoc failed\n");
  			return rc;
  		}
  
  		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
  
  		if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
  			dev->vid_timeout_running = 1;
  			mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
  		} else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
  			dev->vbi_timeout_running = 1;
  			mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
  		}
  	}
  	dev->streaming_users++;
  	return rc;
  }
  
  static void au0828_stop_streaming(struct vb2_queue *vq)
  {
  	struct au0828_dev *dev = vb2_get_drv_priv(vq);
  	struct au0828_dmaqueue *vidq = &dev->vidq;
  	unsigned long flags = 0;
  
  	dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);
  
  	if (dev->streaming_users-- == 1) {
  		au0828_uninit_isoc(dev);
  		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
  	}
  
  	dev->vid_timeout_running = 0;
  	del_timer_sync(&dev->vid_timeout);
  
  	spin_lock_irqsave(&dev->slock, flags);
  	if (dev->isoc_ctl.buf != NULL) {
  		vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
  				VB2_BUF_STATE_ERROR);
  		dev->isoc_ctl.buf = NULL;
  	}
  	while (!list_empty(&vidq->active)) {
  		struct au0828_buffer *buf;
  
  		buf = list_entry(vidq->active.next, struct au0828_buffer, list);
  		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
  		list_del(&buf->list);
  	}
  	spin_unlock_irqrestore(&dev->slock, flags);
  }
  
  void au0828_stop_vbi_streaming(struct vb2_queue *vq)
  {
  	struct au0828_dev *dev = vb2_get_drv_priv(vq);
  	struct au0828_dmaqueue *vbiq = &dev->vbiq;
  	unsigned long flags = 0;
  
  	dprintk(1, "au0828_stop_vbi_streaming called %d\n",
  		dev->streaming_users);
  
  	if (dev->streaming_users-- == 1) {
  		au0828_uninit_isoc(dev);
  		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
  	}
  
  	spin_lock_irqsave(&dev->slock, flags);
  	if (dev->isoc_ctl.vbi_buf != NULL) {
  		vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
  				VB2_BUF_STATE_ERROR);
  		dev->isoc_ctl.vbi_buf = NULL;
  	}
  	while (!list_empty(&vbiq->active)) {
  		struct au0828_buffer *buf;
  
  		buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
  		list_del(&buf->list);
  		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
  	}
  	spin_unlock_irqrestore(&dev->slock, flags);
  
  	dev->vbi_timeout_running = 0;
  	del_timer_sync(&dev->vbi_timeout);
  }
  
  static const struct vb2_ops au0828_video_qops = {
  	.queue_setup     = queue_setup,
  	.buf_prepare     = buffer_prepare,
  	.buf_queue       = buffer_queue,
  	.start_streaming = au0828_start_analog_streaming,
  	.stop_streaming  = au0828_stop_streaming,
  	.wait_prepare    = vb2_ops_wait_prepare,
  	.wait_finish     = vb2_ops_wait_finish,
  };
  
  /* ------------------------------------------------------------------
     V4L2 interface
     ------------------------------------------------------------------*/
  /*
   * au0828_analog_unregister
   * unregister v4l2 devices
   */
  int au0828_analog_unregister(struct au0828_dev *dev)
  {
  	dprintk(1, "au0828_analog_unregister called\n");
  
  	/* No analog TV */
  	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
  		return 0;
  
  	mutex_lock(&au0828_sysfs_lock);
  	video_unregister_device(&dev->vdev);
  	video_unregister_device(&dev->vbi_dev);
  	mutex_unlock(&au0828_sysfs_lock);
  
  	v4l2_device_disconnect(&dev->v4l2_dev);
  	v4l2_device_put(&dev->v4l2_dev);
  
  	return 1;
  }
  
  /* This function ensures that video frames continue to be delivered even if
     the ITU-656 input isn't receiving any data (thereby preventing applications
     such as tvtime from hanging) */
  static void au0828_vid_buffer_timeout(struct timer_list *t)
  {
  	struct au0828_dev *dev = from_timer(dev, t, vid_timeout);
  	struct au0828_dmaqueue *dma_q = &dev->vidq;
  	struct au0828_buffer *buf;
  	unsigned char *vid_data;
  	unsigned long flags = 0;
  
  	spin_lock_irqsave(&dev->slock, flags);
  
  	buf = dev->isoc_ctl.buf;
  	if (buf != NULL) {
  		vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
  		memset(vid_data, 0x00, buf->length); /* Blank green frame */
  		buffer_filled(dev, dma_q, buf);
  	}
  	get_next_buf(dma_q, &buf);
  
  	if (dev->vid_timeout_running == 1)
  		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
  
  	spin_unlock_irqrestore(&dev->slock, flags);
  }
  
  static void au0828_vbi_buffer_timeout(struct timer_list *t)
  {
  	struct au0828_dev *dev = from_timer(dev, t, vbi_timeout);
  	struct au0828_dmaqueue *dma_q = &dev->vbiq;
  	struct au0828_buffer *buf;
  	unsigned char *vbi_data;
  	unsigned long flags = 0;
  
  	spin_lock_irqsave(&dev->slock, flags);
  
  	buf = dev->isoc_ctl.vbi_buf;
  	if (buf != NULL) {
  		vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
  		memset(vbi_data, 0x00, buf->length);
  		buffer_filled(dev, dma_q, buf);
  	}
  	vbi_get_next_buf(dma_q, &buf);
  
  	if (dev->vbi_timeout_running == 1)
  		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
  	spin_unlock_irqrestore(&dev->slock, flags);
  }
  
  static int au0828_v4l2_open(struct file *filp)
  {
  	struct au0828_dev *dev = video_drvdata(filp);
  	int ret;
  
  	dprintk(1,
  		"%s called std_set %d dev_state %ld stream users %d users %d\n",
  		__func__, dev->std_set_in_tuner_core, dev->dev_state,
  		dev->streaming_users, dev->users);
  
  	if (mutex_lock_interruptible(&dev->lock))
  		return -ERESTARTSYS;
  
  	ret = v4l2_fh_open(filp);
  	if (ret) {
  		au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
  				__func__, ret);
  		mutex_unlock(&dev->lock);
  		return ret;
  	}
  
  	if (dev->users == 0) {
  		au0828_analog_stream_enable(dev);
  		au0828_analog_stream_reset(dev);
  		dev->stream_state = STREAM_OFF;
  		set_bit(DEV_INITIALIZED, &dev->dev_state);
  	}
  	dev->users++;
  	mutex_unlock(&dev->lock);
  	return ret;
  }
  
  static int au0828_v4l2_close(struct file *filp)
  {
  	int ret;
  	struct au0828_dev *dev = video_drvdata(filp);
  	struct video_device *vdev = video_devdata(filp);
  
  	dprintk(1,
  		"%s called std_set %d dev_state %ld stream users %d users %d\n",
  		__func__, dev->std_set_in_tuner_core, dev->dev_state,
  		dev->streaming_users, dev->users);
  
  	mutex_lock(&dev->lock);
  	if (vdev->vfl_type == VFL_TYPE_GRABBER && dev->vid_timeout_running) {
  		/* Cancel timeout thread in case they didn't call streamoff */
  		dev->vid_timeout_running = 0;
  		del_timer_sync(&dev->vid_timeout);
  	} else if (vdev->vfl_type == VFL_TYPE_VBI &&
  			dev->vbi_timeout_running) {
  		/* Cancel timeout thread in case they didn't call streamoff */
  		dev->vbi_timeout_running = 0;
  		del_timer_sync(&dev->vbi_timeout);
  	}
  
  	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
  		goto end;
  
  	if (dev->users == 1) {
  		/*
  		 * Avoid putting tuner in sleep if DVB or ALSA are
  		 * streaming.
  		 *
  		 * On most USB devices  like au0828 the tuner can
  		 * be safely put in sleep state here if ALSA isn't
  		 * streaming. Exceptions are some very old USB tuner
  		 * models such as em28xx-based WinTV USB2 which have
  		 * a separate audio output jack. The devices that have
  		 * a separate audio output jack have analog tuners,
  		 * like Philips FM1236. Those devices are always on,
  		 * so the s_power callback are silently ignored.
  		 * So, the current logic here does the following:
  		 * Disable (put tuner to sleep) when
  		 * - ALSA and DVB aren't streaming.
  		 * - the last V4L2 file handler is closed.
  		 *
  		 * FIXME:
  		 *
  		 * Additionally, this logic could be improved to
  		 * disable the media source if the above conditions
  		 * are met and if the device:
  		 * - doesn't have a separate audio out plug (or
  		 * - doesn't use a silicon tuner like xc2028/3028/4000/5000).
  		 *
  		 * Once this additional logic is in place, a callback
  		 * is needed to enable the media source and power on
  		 * the tuner, for radio to work.
  		*/
  		ret = v4l_enable_media_source(vdev);
  		if (ret == 0)
  			v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
  					     standby);
  		dev->std_set_in_tuner_core = 0;
  
  		/* When close the device, set the usb intf0 into alt0 to free
  		   USB bandwidth */
  		ret = usb_set_interface(dev->usbdev, 0, 0);
  		if (ret < 0)
  			pr_info("Au0828 can't set alternate to 0!\n");
  	}
  end:
  	_vb2_fop_release(filp, NULL);
  	dev->users--;
  	mutex_unlock(&dev->lock);
  	return 0;
  }
  
  /* Must be called with dev->lock held */
  static void au0828_init_tuner(struct au0828_dev *dev)
  {
  	struct v4l2_frequency f = {
  		.frequency = dev->ctrl_freq,
  		.type = V4L2_TUNER_ANALOG_TV,
  	};
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	if (dev->std_set_in_tuner_core)
  		return;
  	dev->std_set_in_tuner_core = 1;
  	i2c_gate_ctrl(dev, 1);
  	/* If we've never sent the standard in tuner core, do so now.
  	   We don't do this at device probe because we don't want to
  	   incur the cost of a firmware load */
  	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
  	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
  	i2c_gate_ctrl(dev, 0);
  }
  
  static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
  			     struct v4l2_format *format)
  {
  	int ret;
  	int width = format->fmt.pix.width;
  	int height = format->fmt.pix.height;
  
  	/* If they are demanding a format other than the one we support,
  	   bail out (tvtime asks for UYVY and then retries with YUYV) */
  	if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
  		return -EINVAL;
  
  	/* format->fmt.pix.width only support 720 and height 480 */
  	if (width != 720)
  		width = 720;
  	if (height != 480)
  		height = 480;
  
  	format->fmt.pix.width = width;
  	format->fmt.pix.height = height;
  	format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
  	format->fmt.pix.bytesperline = width * 2;
  	format->fmt.pix.sizeimage = width * height * 2;
  	format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
  	format->fmt.pix.field = V4L2_FIELD_INTERLACED;
  
  	if (cmd == VIDIOC_TRY_FMT)
  		return 0;
  
  	/* maybe set new image format, driver current only support 720*480 */
  	dev->width = width;
  	dev->height = height;
  	dev->frame_size = width * height * 2;
  	dev->field_size = width * height;
  	dev->bytesperline = width * 2;
  
  	if (dev->stream_state == STREAM_ON) {
  		dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
  		ret = au0828_stream_interrupt(dev);
  		if (ret != 0) {
  			dprintk(1, "error interrupting video stream!\n");
  			return ret;
  		}
  	}
  
  	au0828_analog_stream_enable(dev);
  
  	return 0;
  }
  
  static int vidioc_querycap(struct file *file, void  *priv,
  			   struct v4l2_capability *cap)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	strscpy(cap->driver, "au0828", sizeof(cap->driver));
  	strscpy(cap->card, dev->board.name, sizeof(cap->card));
  	usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));
  
  	/* set the device capabilities */
  	cap->capabilities =
  		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
  		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
  		V4L2_CAP_DEVICE_CAPS;
  	return 0;
  }
  
  static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
  					struct v4l2_fmtdesc *f)
  {
  	if (f->index)
  		return -EINVAL;
  
  	dprintk(1, "%s called\n", __func__);
  
  	f->pixelformat = V4L2_PIX_FMT_UYVY;
  
  	return 0;
  }
  
  static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
  					struct v4l2_format *f)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	f->fmt.pix.width = dev->width;
  	f->fmt.pix.height = dev->height;
  	f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
  	f->fmt.pix.bytesperline = dev->bytesperline;
  	f->fmt.pix.sizeimage = dev->frame_size;
  	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
  	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
  	return 0;
  }
  
  static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
  				  struct v4l2_format *f)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
  }
  
  static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
  				struct v4l2_format *f)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  	int rc;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	rc = check_dev(dev);
  	if (rc < 0)
  		return rc;
  
  	if (vb2_is_busy(&dev->vb_vidq)) {
  		pr_info("%s queue busy\n", __func__);
  		rc = -EBUSY;
  		goto out;
  	}
  
  	rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
  out:
  	return rc;
  }
  
  static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	if (norm == dev->std)
  		return 0;
  
  	if (dev->streaming_users > 0)
  		return -EBUSY;
  
  	dev->std = norm;
  
  	au0828_init_tuner(dev);
  
  	i2c_gate_ctrl(dev, 1);
  
  	/*
  	 * FIXME: when we support something other than 60Hz standards,
  	 * we are going to have to make the au0828 bridge adjust the size
  	 * of its capture buffer, which is currently hardcoded at 720x480
  	 */
  
  	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);
  
  	i2c_gate_ctrl(dev, 0);
  
  	return 0;
  }
  
  static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	*norm = dev->std;
  	return 0;
  }
  
  static int vidioc_enum_input(struct file *file, void *priv,
  				struct v4l2_input *input)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  	unsigned int tmp;
  
  	static const char *inames[] = {
  		[AU0828_VMUX_UNDEFINED] = "Undefined",
  		[AU0828_VMUX_COMPOSITE] = "Composite",
  		[AU0828_VMUX_SVIDEO] = "S-Video",
  		[AU0828_VMUX_CABLE] = "Cable TV",
  		[AU0828_VMUX_TELEVISION] = "Television",
  		[AU0828_VMUX_DVB] = "DVB",
  	};
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	tmp = input->index;
  
  	if (tmp >= AU0828_MAX_INPUT)
  		return -EINVAL;
  	if (AUVI_INPUT(tmp).type == 0)
  		return -EINVAL;
  
  	input->index = tmp;
  	strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
  	if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
  	    (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
  		input->type |= V4L2_INPUT_TYPE_TUNER;
  		input->audioset = 1;
  	} else {
  		input->type |= V4L2_INPUT_TYPE_CAMERA;
  		input->audioset = 2;
  	}
  
  	input->std = dev->vdev.tvnorms;
  
  	return 0;
  }
  
  static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	*i = dev->ctrl_input;
  	return 0;
  }
  
  static void au0828_s_input(struct au0828_dev *dev, int index)
  {
  	int i;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	switch (AUVI_INPUT(index).type) {
  	case AU0828_VMUX_SVIDEO:
  		dev->input_type = AU0828_VMUX_SVIDEO;
  		dev->ctrl_ainput = 1;
  		break;
  	case AU0828_VMUX_COMPOSITE:
  		dev->input_type = AU0828_VMUX_COMPOSITE;
  		dev->ctrl_ainput = 1;
  		break;
  	case AU0828_VMUX_TELEVISION:
  		dev->input_type = AU0828_VMUX_TELEVISION;
  		dev->ctrl_ainput = 0;
  		break;
  	default:
  		dprintk(1, "unknown input type set [%d]\n",
  			AUVI_INPUT(index).type);
  		return;
  	}
  
  	dev->ctrl_input = index;
  
  	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
  			AUVI_INPUT(index).vmux, 0, 0);
  
  	for (i = 0; i < AU0828_MAX_INPUT; i++) {
  		int enable = 0;
  		if (AUVI_INPUT(i).audio_setup == NULL)
  			continue;
  
  		if (i == index)
  			enable = 1;
  		else
  			enable = 0;
  		if (enable) {
  			(AUVI_INPUT(i).audio_setup)(dev, enable);
  		} else {
  			/* Make sure we leave it turned on if some
  			   other input is routed to this callback */
  			if ((AUVI_INPUT(i).audio_setup) !=
  			    ((AUVI_INPUT(index).audio_setup))) {
  				(AUVI_INPUT(i).audio_setup)(dev, enable);
  			}
  		}
  	}
  
  	v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
  			AUVI_INPUT(index).amux, 0, 0);
  }
  
  static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  	struct video_device *vfd = video_devdata(file);
  
  	dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
  		index);
  	if (index >= AU0828_MAX_INPUT)
  		return -EINVAL;
  	if (AUVI_INPUT(index).type == 0)
  		return -EINVAL;
  
  	if (dev->ctrl_input == index)
  		return 0;
  
  	au0828_s_input(dev, index);
  
  	/*
  	 * Input has been changed. Disable the media source
  	 * associated with the old input and enable source
  	 * for the newly set input
  	 */
  	v4l_disable_media_source(vfd);
  	return v4l_enable_media_source(vfd);
  }
  
  static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
  {
  	if (a->index > 1)
  		return -EINVAL;
  
  	dprintk(1, "%s called\n", __func__);
  
  	if (a->index == 0)
  		strscpy(a->name, "Television", sizeof(a->name));
  	else
  		strscpy(a->name, "Line in", sizeof(a->name));
  
  	a->capability = V4L2_AUDCAP_STEREO;
  	return 0;
  }
  
  static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	a->index = dev->ctrl_ainput;
  	if (a->index == 0)
  		strscpy(a->name, "Television", sizeof(a->name));
  	else
  		strscpy(a->name, "Line in", sizeof(a->name));
  
  	a->capability = V4L2_AUDCAP_STEREO;
  	return 0;
  }
  
  static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	if (a->index != dev->ctrl_ainput)
  		return -EINVAL;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  	return 0;
  }
  
  static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  	struct video_device *vfd = video_devdata(file);
  	int ret;
  
  	if (t->index != 0)
  		return -EINVAL;
  
  	ret = v4l_enable_media_source(vfd);
  	if (ret)
  		return ret;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	strscpy(t->name, "Auvitek tuner", sizeof(t->name));
  
  	au0828_init_tuner(dev);
  	i2c_gate_ctrl(dev, 1);
  	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
  	i2c_gate_ctrl(dev, 0);
  	return 0;
  }
  
  static int vidioc_s_tuner(struct file *file, void *priv,
  				const struct v4l2_tuner *t)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	if (t->index != 0)
  		return -EINVAL;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	au0828_init_tuner(dev);
  	i2c_gate_ctrl(dev, 1);
  	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
  	i2c_gate_ctrl(dev, 0);
  
  	dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
  		t->afc);
  
  	return 0;
  
  }
  
  static int vidioc_g_frequency(struct file *file, void *priv,
  				struct v4l2_frequency *freq)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	if (freq->tuner != 0)
  		return -EINVAL;
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  	freq->frequency = dev->ctrl_freq;
  	return 0;
  }
  
  static int vidioc_s_frequency(struct file *file, void *priv,
  				const struct v4l2_frequency *freq)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  	struct v4l2_frequency new_freq = *freq;
  
  	if (freq->tuner != 0)
  		return -EINVAL;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	au0828_init_tuner(dev);
  	i2c_gate_ctrl(dev, 1);
  
  	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
  	/* Get the actual set (and possibly clamped) frequency */
  	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
  	dev->ctrl_freq = new_freq.frequency;
  
  	i2c_gate_ctrl(dev, 0);
  
  	au0828_analog_stream_reset(dev);
  
  	return 0;
  }
  
  
  /* RAW VBI ioctls */
  
  static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
  				struct v4l2_format *format)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	format->fmt.vbi.samples_per_line = dev->vbi_width;
  	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
  	format->fmt.vbi.offset = 0;
  	format->fmt.vbi.flags = 0;
  	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
  
  	format->fmt.vbi.count[0] = dev->vbi_height;
  	format->fmt.vbi.count[1] = dev->vbi_height;
  	format->fmt.vbi.start[0] = 21;
  	format->fmt.vbi.start[1] = 284;
  	memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
  
  	return 0;
  }
  
  static int vidioc_g_pixelaspect(struct file *file, void *priv,
  				int type, struct v4l2_fract *f)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
  		return -EINVAL;
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	f->numerator = 54;
  	f->denominator = 59;
  
  	return 0;
  }
  
  static int vidioc_g_selection(struct file *file, void *priv,
  			      struct v4l2_selection *s)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
  		return -EINVAL;
  
  	switch (s->target) {
  	case V4L2_SEL_TGT_CROP_BOUNDS:
  	case V4L2_SEL_TGT_CROP_DEFAULT:
  		s->r.left = 0;
  		s->r.top = 0;
  		s->r.width = dev->width;
  		s->r.height = dev->height;
  		break;
  	default:
  		return -EINVAL;
  	}
  	return 0;
  }
  
  #ifdef CONFIG_VIDEO_ADV_DEBUG
  static int vidioc_g_register(struct file *file, void *priv,
  			     struct v4l2_dbg_register *reg)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	reg->val = au0828_read(dev, reg->reg);
  	reg->size = 1;
  	return 0;
  }
  
  static int vidioc_s_register(struct file *file, void *priv,
  			     const struct v4l2_dbg_register *reg)
  {
  	struct au0828_dev *dev = video_drvdata(file);
  
  	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
  		dev->std_set_in_tuner_core, dev->dev_state);
  
  	return au0828_writereg(dev, reg->reg, reg->val);
  }
  #endif
  
  static int vidioc_log_status(struct file *file, void *fh)
  {
  	struct video_device *vdev = video_devdata(file);
  
  	dprintk(1, "%s called\n", __func__);
  
  	v4l2_ctrl_log_status(file, fh);
  	v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
  	return 0;
  }
  
  void au0828_v4l2_suspend(struct au0828_dev *dev)
  {
  	struct urb *urb;
  	int i;
  
  	pr_info("stopping V4L2\n");
  
  	if (dev->stream_state == STREAM_ON) {
  		pr_info("stopping V4L2 active URBs\n");
  		au0828_analog_stream_disable(dev);
  		/* stop urbs */
  		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
  			urb = dev->isoc_ctl.urb[i];
  			if (urb) {
  				if (!irqs_disabled())
  					usb_kill_urb(urb);
  				else
  					usb_unlink_urb(urb);
  			}
  		}
  	}
  
  	if (dev->vid_timeout_running)
  		del_timer_sync(&dev->vid_timeout);
  	if (dev->vbi_timeout_running)
  		del_timer_sync(&dev->vbi_timeout);
  }
  
  void au0828_v4l2_resume(struct au0828_dev *dev)
  {
  	int i, rc;
  
  	pr_info("restarting V4L2\n");
  
  	if (dev->stream_state == STREAM_ON) {
  		au0828_stream_interrupt(dev);
  		au0828_init_tuner(dev);
  	}
  
  	if (dev->vid_timeout_running)
  		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
  	if (dev->vbi_timeout_running)
  		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
  
  	/* If we were doing ac97 instead of i2s, it would go here...*/
  	au0828_i2s_init(dev);
  
  	au0828_analog_stream_enable(dev);
  
  	if (!(dev->stream_state == STREAM_ON)) {
  		au0828_analog_stream_reset(dev);
  		/* submit urbs */
  		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
  			rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
  			if (rc) {
  				au0828_isocdbg("submit of urb %i failed (error=%i)\n",
  					       i, rc);
  				au0828_uninit_isoc(dev);
  			}
  		}
  	}
  }
  
  static const struct v4l2_file_operations au0828_v4l_fops = {
  	.owner      = THIS_MODULE,
  	.open       = au0828_v4l2_open,
  	.release    = au0828_v4l2_close,
  	.read       = vb2_fop_read,
  	.poll       = vb2_fop_poll,
  	.mmap       = vb2_fop_mmap,
  	.unlocked_ioctl = video_ioctl2,
  };
  
  static const struct v4l2_ioctl_ops video_ioctl_ops = {
  	.vidioc_querycap            = vidioc_querycap,
  	.vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
  	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
  	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
  	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
  	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
  	.vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
  	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
  	.vidioc_enumaudio           = vidioc_enumaudio,
  	.vidioc_g_audio             = vidioc_g_audio,
  	.vidioc_s_audio             = vidioc_s_audio,
  	.vidioc_g_pixelaspect       = vidioc_g_pixelaspect,
  	.vidioc_g_selection         = vidioc_g_selection,
  
  	.vidioc_reqbufs             = vb2_ioctl_reqbufs,
  	.vidioc_create_bufs         = vb2_ioctl_create_bufs,
  	.vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
  	.vidioc_querybuf            = vb2_ioctl_querybuf,
  	.vidioc_qbuf                = vb2_ioctl_qbuf,
  	.vidioc_dqbuf               = vb2_ioctl_dqbuf,
  	.vidioc_expbuf               = vb2_ioctl_expbuf,
  
  	.vidioc_s_std               = vidioc_s_std,
  	.vidioc_g_std               = vidioc_g_std,
  	.vidioc_enum_input          = vidioc_enum_input,
  	.vidioc_g_input             = vidioc_g_input,
  	.vidioc_s_input             = vidioc_s_input,
  
  	.vidioc_streamon            = vb2_ioctl_streamon,
  	.vidioc_streamoff           = vb2_ioctl_streamoff,
  
  	.vidioc_g_tuner             = vidioc_g_tuner,
  	.vidioc_s_tuner             = vidioc_s_tuner,
  	.vidioc_g_frequency         = vidioc_g_frequency,
  	.vidioc_s_frequency         = vidioc_s_frequency,
  #ifdef CONFIG_VIDEO_ADV_DEBUG
  	.vidioc_g_register          = vidioc_g_register,
  	.vidioc_s_register          = vidioc_s_register,
  #endif
  	.vidioc_log_status	    = vidioc_log_status,
  	.vidioc_subscribe_event     = v4l2_ctrl_subscribe_event,
  	.vidioc_unsubscribe_event   = v4l2_event_unsubscribe,
  };
  
  static const struct video_device au0828_video_template = {
  	.fops                       = &au0828_v4l_fops,
  	.release                    = video_device_release_empty,
  	.ioctl_ops		    = &video_ioctl_ops,
  	.tvnorms                    = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
  };
  
  static int au0828_vb2_setup(struct au0828_dev *dev)
  {
  	int rc;
  	struct vb2_queue *q;
  
  	/* Setup Videobuf2 for Video capture */
  	q = &dev->vb_vidq;
  	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
  	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
  	q->drv_priv = dev;
  	q->buf_struct_size = sizeof(struct au0828_buffer);
  	q->ops = &au0828_video_qops;
  	q->mem_ops = &vb2_vmalloc_memops;
  
  	rc = vb2_queue_init(q);
  	if (rc < 0)
  		return rc;
  
  	/* Setup Videobuf2 for VBI capture */
  	q = &dev->vb_vbiq;
  	q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
  	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
  	q->drv_priv = dev;
  	q->buf_struct_size = sizeof(struct au0828_buffer);
  	q->ops = &au0828_vbi_qops;
  	q->mem_ops = &vb2_vmalloc_memops;
  
  	rc = vb2_queue_init(q);
  	if (rc < 0)
  		return rc;
  
  	return 0;
  }
  
  static void au0828_analog_create_entities(struct au0828_dev *dev)
  {
  #if defined(CONFIG_MEDIA_CONTROLLER)
  	static const char * const inames[] = {
  		[AU0828_VMUX_COMPOSITE] = "Composite",
  		[AU0828_VMUX_SVIDEO] = "S-Video",
  		[AU0828_VMUX_CABLE] = "Cable TV",
  		[AU0828_VMUX_TELEVISION] = "Television",
  		[AU0828_VMUX_DVB] = "DVB",
  	};
  	int ret, i;
  
  	/* Initialize Video and VBI pads */
  	dev->video_pad.flags = MEDIA_PAD_FL_SINK;
  	ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
  	if (ret < 0)
  		pr_err("failed to initialize video media entity!\n");
  
  	dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
  	ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
  	if (ret < 0)
  		pr_err("failed to initialize vbi media entity!\n");
  
  	/* Create entities for each input connector */
  	for (i = 0; i < AU0828_MAX_INPUT; i++) {
  		struct media_entity *ent = &dev->input_ent[i];
  
  		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
  			break;
  
  		ent->name = inames[AUVI_INPUT(i).type];
  		ent->flags = MEDIA_ENT_FL_CONNECTOR;
  		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
  
  		switch (AUVI_INPUT(i).type) {
  		case AU0828_VMUX_COMPOSITE:
  			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
  			break;
  		case AU0828_VMUX_SVIDEO:
  			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
  			break;
  		case AU0828_VMUX_CABLE:
  		case AU0828_VMUX_TELEVISION:
  		case AU0828_VMUX_DVB:
  		default: /* Just to shut up a warning */
  			ent->function = MEDIA_ENT_F_CONN_RF;
  			break;
  		}
  
  		ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
  		if (ret < 0)
  			pr_err("failed to initialize input pad[%d]!\n", i);
  
  		ret = media_device_register_entity(dev->media_dev, ent);
  		if (ret < 0)
  			pr_err("failed to register input entity %d!\n", i);
  	}
  #endif
  }
  
  /**************************************************************************/
  
  int au0828_analog_register(struct au0828_dev *dev,
  			   struct usb_interface *interface)
  {
  	int retval = -ENOMEM;
  	struct usb_host_interface *iface_desc;
  	struct usb_endpoint_descriptor *endpoint;
  	int i, ret;
  
  	dprintk(1, "au0828_analog_register called for intf#%d!\n",
  		interface->cur_altsetting->desc.bInterfaceNumber);
  
  	/* No analog TV */
  	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
  		return 0;
  
  	/* set au0828 usb interface0 to as5 */
  	retval = usb_set_interface(dev->usbdev,
  			interface->cur_altsetting->desc.bInterfaceNumber, 5);
  	if (retval != 0) {
  		pr_info("Failure setting usb interface0 to as5\n");
  		return retval;
  	}
  
  	/* Figure out which endpoint has the isoc interface */
  	iface_desc = interface->cur_altsetting;
  	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
  		endpoint = &iface_desc->endpoint[i].desc;
  		if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
  		     == USB_DIR_IN) &&
  		    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
  		     == USB_ENDPOINT_XFER_ISOC)) {
  
  			/* we find our isoc in endpoint */
  			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
  			dev->max_pkt_size = (tmp & 0x07ff) *
  				(((tmp & 0x1800) >> 11) + 1);
  			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
  			dprintk(1,
  				"Found isoc endpoint 0x%02x, max size = %d\n",
  				dev->isoc_in_endpointaddr, dev->max_pkt_size);
  		}
  	}
  	if (!(dev->isoc_in_endpointaddr)) {
  		pr_info("Could not locate isoc endpoint\n");
  		return -ENODEV;
  	}
  
  	init_waitqueue_head(&dev->open);
  	spin_lock_init(&dev->slock);
  
  	/* init video dma queues */
  	INIT_LIST_HEAD(&dev->vidq.active);
  	INIT_LIST_HEAD(&dev->vbiq.active);
  
  	timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
  	timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);
  
  	dev->width = NTSC_STD_W;
  	dev->height = NTSC_STD_H;
  	dev->field_size = dev->width * dev->height;
  	dev->frame_size = dev->field_size << 1;
  	dev->bytesperline = dev->width << 1;
  	dev->vbi_width = 720;
  	dev->vbi_height = 1;
  	dev->ctrl_ainput = 0;
  	dev->ctrl_freq = 960;
  	dev->std = V4L2_STD_NTSC_M;
  	/* Default input is TV Tuner */
  	au0828_s_input(dev, 0);
  
  	mutex_init(&dev->vb_queue_lock);
  	mutex_init(&dev->vb_vbi_queue_lock);
  
  	/* Fill the video capture device struct */
  	dev->vdev = au0828_video_template;
  	dev->vdev.v4l2_dev = &dev->v4l2_dev;
  	dev->vdev.lock = &dev->lock;
  	dev->vdev.queue = &dev->vb_vidq;
  	dev->vdev.queue->lock = &dev->vb_queue_lock;
  	dev->vdev.device_caps =
  		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
  		V4L2_CAP_TUNER | V4L2_CAP_VIDEO_CAPTURE;
  	strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));
  
  	/* Setup the VBI device */
  	dev->vbi_dev = au0828_video_template;
  	dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
  	dev->vbi_dev.lock = &dev->lock;
  	dev->vbi_dev.queue = &dev->vb_vbiq;
  	dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
  	dev->vbi_dev.device_caps =
  		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
  		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE;
  	strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));
  
  	/* Init entities at the Media Controller */
  	au0828_analog_create_entities(dev);
  
  	/* initialize videobuf2 stuff */
  	retval = au0828_vb2_setup(dev);
  	if (retval != 0) {
  		dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
  			retval);
  		return -ENODEV;
  	}
  
  	/* Register the v4l2 device */
  	video_set_drvdata(&dev->vdev, dev);
  	retval = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
  	if (retval != 0) {
  		dprintk(1, "unable to register video device (error = %d).\n",
  			retval);
  		ret = -ENODEV;
  		goto err_reg_vdev;
  	}
  
  	/* Register the vbi device */
  	video_set_drvdata(&dev->vbi_dev, dev);
  	retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
  	if (retval != 0) {
  		dprintk(1, "unable to register vbi device (error = %d).\n",
  			retval);
  		ret = -ENODEV;
  		goto err_reg_vbi_dev;
  	}
  
  #ifdef CONFIG_MEDIA_CONTROLLER
  	retval = v4l2_mc_create_media_graph(dev->media_dev);
  	if (retval) {
  		pr_err("%s() au0282_dev_register failed to create graph\n",
  			__func__);
  		ret = -ENODEV;
  		goto err_reg_vbi_dev;
  	}
  #endif
  
  	dprintk(1, "%s completed!\n", __func__);
  
  	return 0;
  
  err_reg_vbi_dev:
  	video_unregister_device(&dev->vdev);
  err_reg_vdev:
  	vb2_queue_release(&dev->vb_vidq);
  	vb2_queue_release(&dev->vb_vbiq);
  	return ret;
  }
  
  