Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2284 insertions, 0 deletions

diff --git a/drivers/media/usb/cx231xx/cx231xx-video.c b/drivers/media/usb/cx231xx/cx231xx-video.c
new file mode 100644
index 000000000..963739fa8
--- /dev/null
+++ b/drivers/media/usb/cx231xx/cx231xx-video.c
@@ -0,0 +1,2284 @@
+/*
+   cx231xx-video.c - driver for Conexant Cx23100/101/102
+		     USB video capture devices
+
+   Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
+	Based on em28xx driver
+	Based on cx23885 driver
+	Based on cx88 driver
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "cx231xx.h"
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/bitmap.h>
+#include <linux/i2c.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include <media/drv-intf/msp3400.h>
+#include <media/tuner.h>
+
+#include <media/dvb_frontend.h>
+
+#include "cx231xx-vbi.h"
+
+#define CX231XX_VERSION "0.0.3"
+
+#define DRIVER_AUTHOR   "Srinivasa Deevi <srinivasa.deevi@conexant.com>"
+#define DRIVER_DESC     "Conexant cx231xx based USB video device driver"
+
+#define cx231xx_videodbg(fmt, arg...) do {\
+	if (video_debug) \
+		printk(KERN_INFO "%s %s :"fmt, \
+			 dev->name, __func__ , ##arg); } while (0)
+
+static unsigned int isoc_debug;
+module_param(isoc_debug, int, 0644);
+MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
+
+#define cx231xx_isocdbg(fmt, arg...) \
+do {\
+	if (isoc_debug) { \
+		printk(KERN_INFO "%s %s :"fmt, \
+			 dev->name, __func__ , ##arg); \
+	} \
+  } while (0)
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(CX231XX_VERSION);
+
+static unsigned int card[]     = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
+static unsigned int video_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
+static unsigned int vbi_nr[]   = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
+static unsigned int radio_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
+
+module_param_array(card, int, NULL, 0444);
+module_param_array(video_nr, int, NULL, 0444);
+module_param_array(vbi_nr, int, NULL, 0444);
+module_param_array(radio_nr, int, NULL, 0444);
+
+MODULE_PARM_DESC(card, "card type");
+MODULE_PARM_DESC(video_nr, "video device numbers");
+MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
+MODULE_PARM_DESC(radio_nr, "radio device numbers");
+
+static unsigned int video_debug;
+module_param(video_debug, int, 0644);
+MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
+
+/* supported video standards */
+static struct cx231xx_fmt format[] = {
+	{
+	 .name = "16bpp YUY2, 4:2:2, packed",
+	 .fourcc = V4L2_PIX_FMT_YUYV,
+	 .depth = 16,
+	 .reg = 0,
+	 },
+};
+
+
+static int cx231xx_enable_analog_tuner(struct cx231xx *dev)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+	struct media_device *mdev = dev->media_dev;
+	struct media_entity  *entity, *decoder = NULL, *source;
+	struct media_link *link, *found_link = NULL;
+	int ret, active_links = 0;
+
+	if (!mdev)
+		return 0;
+
+	/*
+	 * This will find the tuner that is connected into the decoder.
+	 * Technically, this is not 100% correct, as the device may be
+	 * using an analog input instead of the tuner. However, as we can't
+	 * do DVB streaming while the DMA engine is being used for V4L2,
+	 * this should be enough for the actual needs.
+	 */
+	media_device_for_each_entity(entity, mdev) {
+		if (entity->function == MEDIA_ENT_F_ATV_DECODER) {
+			decoder = entity;
+			break;
+		}
+	}
+	if (!decoder)
+		return 0;
+
+	list_for_each_entry(link, &decoder->links, list) {
+		if (link->sink->entity == decoder) {
+			found_link = link;
+			if (link->flags & MEDIA_LNK_FL_ENABLED)
+				active_links++;
+			break;
+		}
+	}
+
+	if (active_links == 1 || !found_link)
+		return 0;
+
+	source = found_link->source->entity;
+	list_for_each_entry(link, &source->links, list) {
+		struct media_entity *sink;
+		int flags = 0;
+
+		sink = link->sink->entity;
+
+		if (sink == entity)
+			flags = MEDIA_LNK_FL_ENABLED;
+
+		ret = media_entity_setup_link(link, flags);
+		if (ret) {
+			dev_err(dev->dev,
+				"Couldn't change link %s->%s to %s. Error %d\n",
+				source->name, sink->name,
+				flags ? "enabled" : "disabled",
+				ret);
+			return ret;
+		} else
+			dev_dbg(dev->dev,
+				"link %s->%s was %s\n",
+				source->name, sink->name,
+				flags ? "ENABLED" : "disabled");
+	}
+#endif
+	return 0;
+}
+
+/* ------------------------------------------------------------------
+	Video buffer and parser functions
+   ------------------------------------------------------------------*/
+
+/*
+ * Announces that a buffer were filled and request the next
+ */
+static inline void buffer_filled(struct cx231xx *dev,
+				 struct cx231xx_dmaqueue *dma_q,
+				 struct cx231xx_buffer *buf)
+{
+	/* Advice that buffer was filled */
+	cx231xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
+	buf->vb.state = VIDEOBUF_DONE;
+	buf->vb.field_count++;
+	v4l2_get_timestamp(&buf->vb.ts);
+
+	if (dev->USE_ISO)
+		dev->video_mode.isoc_ctl.buf = NULL;
+	else
+		dev->video_mode.bulk_ctl.buf = NULL;
+
+	list_del(&buf->vb.queue);
+	wake_up(&buf->vb.done);
+}
+
+static inline void print_err_status(struct cx231xx *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) {
+		cx231xx_isocdbg("URB status %d [%s].\n", status, errmsg);
+	} else {
+		cx231xx_isocdbg("URB packet %d, status %d [%s].\n",
+				packet, status, errmsg);
+	}
+}
+
+/*
+ * video-buf generic routine to get the next available buffer
+ */
+static inline void get_next_buf(struct cx231xx_dmaqueue *dma_q,
+				struct cx231xx_buffer **buf)
+{
+	struct cx231xx_video_mode *vmode =
+	    container_of(dma_q, struct cx231xx_video_mode, vidq);
+	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
+
+	char *outp;
+
+	if (list_empty(&dma_q->active)) {
+		cx231xx_isocdbg("No active queue to serve\n");
+		if (dev->USE_ISO)
+			dev->video_mode.isoc_ctl.buf = NULL;
+		else
+			dev->video_mode.bulk_ctl.buf = NULL;
+		*buf = NULL;
+		return;
+	}
+
+	/* Get the next buffer */
+	*buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue);
+
+	/* Cleans up buffer - Useful for testing for frame/URB loss */
+	outp = videobuf_to_vmalloc(&(*buf)->vb);
+	memset(outp, 0, (*buf)->vb.size);
+
+	if (dev->USE_ISO)
+		dev->video_mode.isoc_ctl.buf = *buf;
+	else
+		dev->video_mode.bulk_ctl.buf = *buf;
+
+	return;
+}
+
+/*
+ * Controls the isoc copy of each urb packet
+ */
+static inline int cx231xx_isoc_copy(struct cx231xx *dev, struct urb *urb)
+{
+	struct cx231xx_dmaqueue *dma_q = urb->context;
+	int i;
+	unsigned char *p_buffer;
+	u32 bytes_parsed = 0, buffer_size = 0;
+	u8 sav_eav = 0;
+
+	if (!dev)
+		return 0;
+
+	if (dev->state & DEV_DISCONNECTED)
+		return 0;
+
+	if (urb->status < 0) {
+		print_err_status(dev, -1, urb->status);
+		if (urb->status == -ENOENT)
+			return 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) {
+			/* cx231xx_isocdbg("packet %d is empty",i); - spammy */
+			continue;
+		}
+		if (urb->iso_frame_desc[i].actual_length >
+		    dev->video_mode.max_pkt_size) {
+			cx231xx_isocdbg("packet bigger than packet size");
+			continue;
+		}
+
+		/*  get buffer pointer and length */
+		p_buffer = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+		buffer_size = urb->iso_frame_desc[i].actual_length;
+		bytes_parsed = 0;
+
+		if (dma_q->is_partial_line) {
+			/* Handle the case of a partial line */
+			sav_eav = dma_q->last_sav;
+		} else {
+			/* Check for a SAV/EAV overlapping
+				the buffer boundary */
+			sav_eav =
+			    cx231xx_find_boundary_SAV_EAV(p_buffer,
+							  dma_q->partial_buf,
+							  &bytes_parsed);
+		}
+
+		sav_eav &= 0xF0;
+		/* Get the first line if we have some portion of an SAV/EAV from
+		   the last buffer or a partial line  */
+		if (sav_eav) {
+			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
+				sav_eav,	/* SAV/EAV */
+				p_buffer + bytes_parsed,	/* p_buffer */
+				buffer_size - bytes_parsed);/* buf size */
+		}
+
+		/* Now parse data that is completely in this buffer */
+		/* dma_q->is_partial_line = 0;  */
+
+		while (bytes_parsed < buffer_size) {
+			u32 bytes_used = 0;
+
+			sav_eav = cx231xx_find_next_SAV_EAV(
+				p_buffer + bytes_parsed,	/* p_buffer */
+				buffer_size - bytes_parsed,	/* buf size */
+				&bytes_used);/* bytes used to get SAV/EAV */
+
+			bytes_parsed += bytes_used;
+
+			sav_eav &= 0xF0;
+			if (sav_eav && (bytes_parsed < buffer_size)) {
+				bytes_parsed += cx231xx_get_video_line(dev,
+					dma_q, sav_eav,	/* SAV/EAV */
+					p_buffer + bytes_parsed,/* p_buffer */
+					buffer_size - bytes_parsed);/*buf size*/
+			}
+		}
+
+		/* Save the last four bytes of the buffer so we can check the
+		   buffer boundary condition next time */
+		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
+		bytes_parsed = 0;
+
+	}
+	return 1;
+}
+
+static inline int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb)
+{
+	struct cx231xx_dmaqueue *dma_q = urb->context;
+	unsigned char *p_buffer;
+	u32 bytes_parsed = 0, buffer_size = 0;
+	u8 sav_eav = 0;
+
+	if (!dev)
+		return 0;
+
+	if (dev->state & DEV_DISCONNECTED)
+		return 0;
+
+	if (urb->status < 0) {
+		print_err_status(dev, -1, urb->status);
+		if (urb->status == -ENOENT)
+			return 0;
+	}
+
+	if (1) {
+
+		/*  get buffer pointer and length */
+		p_buffer = urb->transfer_buffer;
+		buffer_size = urb->actual_length;
+		bytes_parsed = 0;
+
+		if (dma_q->is_partial_line) {
+			/* Handle the case of a partial line */
+			sav_eav = dma_q->last_sav;
+		} else {
+			/* Check for a SAV/EAV overlapping
+				the buffer boundary */
+			sav_eav =
+			    cx231xx_find_boundary_SAV_EAV(p_buffer,
+							  dma_q->partial_buf,
+							  &bytes_parsed);
+		}
+
+		sav_eav &= 0xF0;
+		/* Get the first line if we have some portion of an SAV/EAV from
+		   the last buffer or a partial line  */
+		if (sav_eav) {
+			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
+				sav_eav,	/* SAV/EAV */
+				p_buffer + bytes_parsed,	/* p_buffer */
+				buffer_size - bytes_parsed);/* buf size */
+		}
+
+		/* Now parse data that is completely in this buffer */
+		/* dma_q->is_partial_line = 0;  */
+
+		while (bytes_parsed < buffer_size) {
+			u32 bytes_used = 0;
+
+			sav_eav = cx231xx_find_next_SAV_EAV(
+				p_buffer + bytes_parsed,	/* p_buffer */
+				buffer_size - bytes_parsed,	/* buf size */
+				&bytes_used);/* bytes used to get SAV/EAV */
+
+			bytes_parsed += bytes_used;
+
+			sav_eav &= 0xF0;
+			if (sav_eav && (bytes_parsed < buffer_size)) {
+				bytes_parsed += cx231xx_get_video_line(dev,
+					dma_q, sav_eav,	/* SAV/EAV */
+					p_buffer + bytes_parsed,/* p_buffer */
+					buffer_size - bytes_parsed);/*buf size*/
+			}
+		}
+
+		/* Save the last four bytes of the buffer so we can check the
+		   buffer boundary condition next time */
+		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
+		bytes_parsed = 0;
+
+	}
+	return 1;
+}
+
+
+u8 cx231xx_find_boundary_SAV_EAV(u8 *p_buffer, u8 *partial_buf,
+				 u32 *p_bytes_used)
+{
+	u32 bytes_used;
+	u8 boundary_bytes[8];
+	u8 sav_eav = 0;
+
+	*p_bytes_used = 0;
+
+	/* Create an array of the last 4 bytes of the last buffer and the first
+	   4 bytes of the current buffer. */
+
+	memcpy(boundary_bytes, partial_buf, 4);
+	memcpy(boundary_bytes + 4, p_buffer, 4);
+
+	/* Check for the SAV/EAV in the boundary buffer */
+	sav_eav = cx231xx_find_next_SAV_EAV((u8 *)&boundary_bytes, 8,
+					    &bytes_used);
+
+	if (sav_eav) {
+		/* found a boundary SAV/EAV.  Updates the bytes used to reflect
+		   only those used in the new buffer */
+		*p_bytes_used = bytes_used - 4;
+	}
+
+	return sav_eav;
+}
+
+u8 cx231xx_find_next_SAV_EAV(u8 *p_buffer, u32 buffer_size, u32 *p_bytes_used)
+{
+	u32 i;
+	u8 sav_eav = 0;
+
+	/*
+	 * Don't search if the buffer size is less than 4.  It causes a page
+	 * fault since buffer_size - 4 evaluates to a large number in that
+	 * case.
+	 */
+	if (buffer_size < 4) {
+		*p_bytes_used = buffer_size;
+		return 0;
+	}
+
+	for (i = 0; i < (buffer_size - 3); i++) {
+
+		if ((p_buffer[i] == 0xFF) &&
+		    (p_buffer[i + 1] == 0x00) && (p_buffer[i + 2] == 0x00)) {
+
+			*p_bytes_used = i + 4;
+			sav_eav = p_buffer[i + 3];
+			return sav_eav;
+		}
+	}
+
+	*p_bytes_used = buffer_size;
+	return 0;
+}
+
+u32 cx231xx_get_video_line(struct cx231xx *dev,
+			   struct cx231xx_dmaqueue *dma_q, u8 sav_eav,
+			   u8 *p_buffer, u32 buffer_size)
+{
+	u32 bytes_copied = 0;
+	int current_field = -1;
+
+	switch (sav_eav) {
+	case SAV_ACTIVE_VIDEO_FIELD1:
+		/* looking for skipped line which occurred in PAL 720x480 mode.
+		   In this case, there will be no active data contained
+		   between the SAV and EAV */
+		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
+		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
+		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
+		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
+		     (p_buffer[3] == EAV_VBLANK_FIELD1) ||
+		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
+			return bytes_copied;
+		current_field = 1;
+		break;
+
+	case SAV_ACTIVE_VIDEO_FIELD2:
+		/* looking for skipped line which occurred in PAL 720x480 mode.
+		   In this case, there will be no active data contained between
+		   the SAV and EAV */
+		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
+		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
+		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
+		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
+		     (p_buffer[3] == EAV_VBLANK_FIELD1)       ||
+		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
+			return bytes_copied;
+		current_field = 2;
+		break;
+	}
+
+	dma_q->last_sav = sav_eav;
+
+	bytes_copied = cx231xx_copy_video_line(dev, dma_q, p_buffer,
+					       buffer_size, current_field);
+
+	return bytes_copied;
+}
+
+u32 cx231xx_copy_video_line(struct cx231xx *dev,
+			    struct cx231xx_dmaqueue *dma_q, u8 *p_line,
+			    u32 length, int field_number)
+{
+	u32 bytes_to_copy;
+	struct cx231xx_buffer *buf;
+	u32 _line_size = dev->width * 2;
+
+	if (dma_q->current_field != field_number)
+		cx231xx_reset_video_buffer(dev, dma_q);
+
+	/* get the buffer pointer */
+	if (dev->USE_ISO)
+		buf = dev->video_mode.isoc_ctl.buf;
+	else
+		buf = dev->video_mode.bulk_ctl.buf;
+
+	/* Remember the field number for next time */
+	dma_q->current_field = field_number;
+
+	bytes_to_copy = dma_q->bytes_left_in_line;
+	if (bytes_to_copy > length)
+		bytes_to_copy = length;
+
+	if (dma_q->lines_completed >= dma_q->lines_per_field) {
+		dma_q->bytes_left_in_line -= bytes_to_copy;
+		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0) ?
+					  0 : 1;
+		return 0;
+	}
+
+	dma_q->is_partial_line = 1;
+
+	/* If we don't have a buffer, just return the number of bytes we would
+	   have copied if we had a buffer. */
+	if (!buf) {
+		dma_q->bytes_left_in_line -= bytes_to_copy;
+		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0)
+					 ? 0 : 1;
+		return bytes_to_copy;
+	}
+
+	/* copy the data to video buffer */
+	cx231xx_do_copy(dev, dma_q, p_line, bytes_to_copy);
+
+	dma_q->pos += bytes_to_copy;
+	dma_q->bytes_left_in_line -= bytes_to_copy;
+
+	if (dma_q->bytes_left_in_line == 0) {
+		dma_q->bytes_left_in_line = _line_size;
+		dma_q->lines_completed++;
+		dma_q->is_partial_line = 0;
+
+		if (cx231xx_is_buffer_done(dev, dma_q) && buf) {
+			buffer_filled(dev, dma_q, buf);
+
+			dma_q->pos = 0;
+			buf = NULL;
+			dma_q->lines_completed = 0;
+		}
+	}
+
+	return bytes_to_copy;
+}
+
+void cx231xx_reset_video_buffer(struct cx231xx *dev,
+				struct cx231xx_dmaqueue *dma_q)
+{
+	struct cx231xx_buffer *buf;
+
+	/* handle the switch from field 1 to field 2 */
+	if (dma_q->current_field == 1) {
+		if (dma_q->lines_completed >= dma_q->lines_per_field)
+			dma_q->field1_done = 1;
+		else
+			dma_q->field1_done = 0;
+	}
+
+	if (dev->USE_ISO)
+		buf = dev->video_mode.isoc_ctl.buf;
+	else
+		buf = dev->video_mode.bulk_ctl.buf;
+
+	if (buf == NULL) {
+		/* first try to get the buffer */
+		get_next_buf(dma_q, &buf);
+
+		dma_q->pos = 0;
+		dma_q->field1_done = 0;
+		dma_q->current_field = -1;
+	}
+
+	/* reset the counters */
+	dma_q->bytes_left_in_line = dev->width << 1;
+	dma_q->lines_completed = 0;
+}
+
+int cx231xx_do_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
+		    u8 *p_buffer, u32 bytes_to_copy)
+{
+	u8 *p_out_buffer = NULL;
+	u32 current_line_bytes_copied = 0;
+	struct cx231xx_buffer *buf;
+	u32 _line_size = dev->width << 1;
+	void *startwrite;
+	int offset, lencopy;
+
+	if (dev->USE_ISO)
+		buf = dev->video_mode.isoc_ctl.buf;
+	else
+		buf = dev->video_mode.bulk_ctl.buf;
+
+	if (buf == NULL)
+		return -1;
+
+	p_out_buffer = videobuf_to_vmalloc(&buf->vb);
+
+	current_line_bytes_copied = _line_size - dma_q->bytes_left_in_line;
+
+	/* Offset field 2 one line from the top of the buffer */
+	offset = (dma_q->current_field == 1) ? 0 : _line_size;
+
+	/* Offset for field 2 */
+	startwrite = p_out_buffer + offset;
+
+	/* lines already completed in the current field */
+	startwrite += (dma_q->lines_completed * _line_size * 2);
+
+	/* bytes already completed in the current line */
+	startwrite += current_line_bytes_copied;
+
+	lencopy = dma_q->bytes_left_in_line > bytes_to_copy ?
+		  bytes_to_copy : dma_q->bytes_left_in_line;
+
+	if ((u8 *)(startwrite + lencopy) > (u8 *)(p_out_buffer + buf->vb.size))
+		return 0;
+
+	/* The below copies the UYVY data straight into video buffer */
+	cx231xx_swab((u16 *) p_buffer, (u16 *) startwrite, (u16) lencopy);
+
+	return 0;
+}
+
+void cx231xx_swab(u16 *from, u16 *to, u16 len)
+{
+	u16 i;
+
+	if (len <= 0)
+		return;
+
+	for (i = 0; i < len / 2; i++)
+		to[i] = (from[i] << 8) | (from[i] >> 8);
+}
+
+u8 cx231xx_is_buffer_done(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q)
+{
+	u8 buffer_complete = 0;
+
+	/* Dual field stream */
+	buffer_complete = ((dma_q->current_field == 2) &&
+			   (dma_q->lines_completed >= dma_q->lines_per_field) &&
+			    dma_q->field1_done);
+
+	return buffer_complete;
+}
+
+/* ------------------------------------------------------------------
+	Videobuf operations
+   ------------------------------------------------------------------*/
+
+static int
+buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
+{
+	struct cx231xx_fh *fh = vq->priv_data;
+	struct cx231xx *dev = fh->dev;
+
+	*size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)>>3;
+	if (0 == *count)
+		*count = CX231XX_DEF_BUF;
+
+	if (*count < CX231XX_MIN_BUF)
+		*count = CX231XX_MIN_BUF;
+
+
+	cx231xx_enable_analog_tuner(dev);
+
+	return 0;
+}
+
+/* This is called *without* dev->slock held; please keep it that way */
+static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf)
+{
+	struct cx231xx_fh *fh = vq->priv_data;
+	struct cx231xx *dev = fh->dev;
+	unsigned long flags = 0;
+
+	BUG_ON(in_interrupt());
+
+	/* We used to wait for the buffer to finish here, but this didn't work
+	   because, as we were keeping the state as VIDEOBUF_QUEUED,
+	   videobuf_queue_cancel marked it as finished for us.
+	   (Also, it could wedge forever if the hardware was misconfigured.)
+
+	   This should be safe; by the time we get here, the buffer isn't
+	   queued anymore. If we ever start marking the buffers as
+	   VIDEOBUF_ACTIVE, it won't be, though.
+	 */
+	spin_lock_irqsave(&dev->video_mode.slock, flags);
+	if (dev->USE_ISO) {
+		if (dev->video_mode.isoc_ctl.buf == buf)
+			dev->video_mode.isoc_ctl.buf = NULL;
+	} else {
+		if (dev->video_mode.bulk_ctl.buf == buf)
+			dev->video_mode.bulk_ctl.buf = NULL;
+	}
+	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
+
+	videobuf_vmalloc_free(&buf->vb);
+	buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int
+buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
+	       enum v4l2_field field)
+{
+	struct cx231xx_fh *fh = vq->priv_data;
+	struct cx231xx_buffer *buf =
+	    container_of(vb, struct cx231xx_buffer, vb);
+	struct cx231xx *dev = fh->dev;
+	int rc = 0, urb_init = 0;
+
+	/* The only currently supported format is 16 bits/pixel */
+	buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
+			+ 7) >> 3;
+	if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
+		return -EINVAL;
+
+	buf->vb.width = dev->width;
+	buf->vb.height = dev->height;
+	buf->vb.field = field;
+
+	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
+		rc = videobuf_iolock(vq, &buf->vb, NULL);
+		if (rc < 0)
+			goto fail;
+	}
+
+	if (dev->USE_ISO) {
+		if (!dev->video_mode.isoc_ctl.num_bufs)
+			urb_init = 1;
+	} else {
+		if (!dev->video_mode.bulk_ctl.num_bufs)
+			urb_init = 1;
+	}
+	dev_dbg(dev->dev,
+		"urb_init=%d dev->video_mode.max_pkt_size=%d\n",
+		urb_init, dev->video_mode.max_pkt_size);
+	if (urb_init) {
+		dev->mode_tv = 0;
+		if (dev->USE_ISO)
+			rc = cx231xx_init_isoc(dev, CX231XX_NUM_PACKETS,
+				       CX231XX_NUM_BUFS,
+				       dev->video_mode.max_pkt_size,
+				       cx231xx_isoc_copy);
+		else
+			rc = cx231xx_init_bulk(dev, CX231XX_NUM_PACKETS,
+				       CX231XX_NUM_BUFS,
+				       dev->video_mode.max_pkt_size,
+				       cx231xx_bulk_copy);
+		if (rc < 0)
+			goto fail;
+	}
+
+	buf->vb.state = VIDEOBUF_PREPARED;
+
+	return 0;
+
+fail:
+	free_buffer(vq, buf);
+	return rc;
+}
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+	struct cx231xx_buffer *buf =
+	    container_of(vb, struct cx231xx_buffer, vb);
+	struct cx231xx_fh *fh = vq->priv_data;
+	struct cx231xx *dev = fh->dev;
+	struct cx231xx_dmaqueue *vidq = &dev->video_mode.vidq;
+
+	buf->vb.state = VIDEOBUF_QUEUED;
+	list_add_tail(&buf->vb.queue, &vidq->active);
+
+}
+
+static void buffer_release(struct videobuf_queue *vq,
+			   struct videobuf_buffer *vb)
+{
+	struct cx231xx_buffer *buf =
+	    container_of(vb, struct cx231xx_buffer, vb);
+	struct cx231xx_fh *fh = vq->priv_data;
+	struct cx231xx *dev = (struct cx231xx *)fh->dev;
+
+	cx231xx_isocdbg("cx231xx: called buffer_release\n");
+
+	free_buffer(vq, buf);
+}
+
+static const struct videobuf_queue_ops cx231xx_video_qops = {
+	.buf_setup = buffer_setup,
+	.buf_prepare = buffer_prepare,
+	.buf_queue = buffer_queue,
+	.buf_release = buffer_release,
+};
+
+/*********************  v4l2 interface  **************************************/
+
+void video_mux(struct cx231xx *dev, int index)
+{
+	dev->video_input = index;
+	dev->ctl_ainput = INPUT(index)->amux;
+
+	cx231xx_set_video_input_mux(dev, index);
+
+	cx25840_call(dev, video, s_routing, INPUT(index)->vmux, 0, 0);
+
+	cx231xx_set_audio_input(dev, dev->ctl_ainput);
+
+	dev_dbg(dev->dev, "video_mux : %d\n", index);
+
+	/* do mode control overrides if required */
+	cx231xx_do_mode_ctrl_overrides(dev);
+}
+
+/* Usage lock check functions */
+static int res_get(struct cx231xx_fh *fh)
+{
+	struct cx231xx *dev = fh->dev;
+	int rc = 0;
+
+	/* This instance already has stream_on */
+	if (fh->stream_on)
+		return rc;
+
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		if (dev->stream_on)
+			return -EBUSY;
+		dev->stream_on = 1;
+	} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		if (dev->vbi_stream_on)
+			return -EBUSY;
+		dev->vbi_stream_on = 1;
+	} else
+		return -EINVAL;
+
+	fh->stream_on = 1;
+
+	return rc;
+}
+
+static int res_check(struct cx231xx_fh *fh)
+{
+	return fh->stream_on;
+}
+
+static void res_free(struct cx231xx_fh *fh)
+{
+	struct cx231xx *dev = fh->dev;
+
+	fh->stream_on = 0;
+
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		dev->stream_on = 0;
+	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
+		dev->vbi_stream_on = 0;
+}
+
+static int check_dev(struct cx231xx *dev)
+{
+	if (dev->state & DEV_DISCONNECTED) {
+		dev_err(dev->dev, "v4l2 ioctl: device not present\n");
+		return -ENODEV;
+	}
+	return 0;
+}
+
+/* ------------------------------------------------------------------
+	IOCTL vidioc handling
+   ------------------------------------------------------------------*/
+
+static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	f->fmt.pix.width = dev->width;
+	f->fmt.pix.height = dev->height;
+	f->fmt.pix.pixelformat = dev->format->fourcc;
+	f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+
+	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+	return 0;
+}
+
+static struct cx231xx_fmt *format_by_fourcc(unsigned int fourcc)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(format); i++)
+		if (format[i].fourcc == fourcc)
+			return &format[i];
+
+	return NULL;
+}
+
+static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	unsigned int width = f->fmt.pix.width;
+	unsigned int height = f->fmt.pix.height;
+	unsigned int maxw = norm_maxw(dev);
+	unsigned int maxh = norm_maxh(dev);
+	struct cx231xx_fmt *fmt;
+
+	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+	if (!fmt) {
+		cx231xx_videodbg("Fourcc format (%08x) invalid.\n",
+				 f->fmt.pix.pixelformat);
+		return -EINVAL;
+	}
+
+	/* width must even because of the YUYV format
+	   height must be even because of interlacing */
+	v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0);
+
+	f->fmt.pix.width = width;
+	f->fmt.pix.height = height;
+	f->fmt.pix.pixelformat = fmt->fourcc;
+	f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+	return 0;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+	struct cx231xx_fmt *fmt;
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	vidioc_try_fmt_vid_cap(file, priv, f);
+
+	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+	if (!fmt)
+		return -EINVAL;
+
+	if (videobuf_queue_is_busy(&fh->vb_vidq)) {
+		dev_err(dev->dev, "%s: queue busy\n", __func__);
+		return -EBUSY;
+	}
+
+	if (dev->stream_on && !fh->stream_on) {
+		dev_err(dev->dev,
+			"%s: device in use by another fh\n", __func__);
+		return -EBUSY;
+	}
+
+	/* set new image size */
+	dev->width = f->fmt.pix.width;
+	dev->height = f->fmt.pix.height;
+	dev->format = fmt;
+
+	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
+	call_all(dev, pad, set_fmt, NULL, &format);
+	v4l2_fill_pix_format(&f->fmt.pix, &format.format);
+
+	return rc;
+}
+
+static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	*id = dev->norm;
+	return 0;
+}
+
+static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (dev->norm == norm)
+		return 0;
+
+	if (videobuf_queue_is_busy(&fh->vb_vidq))
+		return -EBUSY;
+
+	dev->norm = norm;
+
+	/* Adjusts width/height, if needed */
+	dev->width = 720;
+	dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;
+
+	call_all(dev, video, s_std, dev->norm);
+
+	/* We need to reset basic properties in the decoder related to
+	   resolution (since a standard change effects things like the number
+	   of lines in VACT, etc) */
+	format.format.code = MEDIA_BUS_FMT_FIXED;
+	format.format.width = dev->width;
+	format.format.height = dev->height;
+	call_all(dev, pad, set_fmt, NULL, &format);
+
+	/* do mode control overrides */
+	cx231xx_do_mode_ctrl_overrides(dev);
+
+	return 0;
+}
+
+static const char *iname[] = {
+	[CX231XX_VMUX_COMPOSITE1] = "Composite1",
+	[CX231XX_VMUX_SVIDEO]     = "S-Video",
+	[CX231XX_VMUX_TELEVISION] = "Television",
+	[CX231XX_VMUX_CABLE]      = "Cable TV",
+	[CX231XX_VMUX_DVB]        = "DVB",
+};
+
+void cx231xx_v4l2_create_entities(struct cx231xx *dev)
+{
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	int ret, i;
+
+	/* Create entities for each input connector */
+	for (i = 0; i < MAX_CX231XX_INPUT; i++) {
+		struct media_entity *ent = &dev->input_ent[i];
+
+		if (!INPUT(i)->type)
+			break;
+
+		ent->name = iname[INPUT(i)->type];
+		ent->flags = MEDIA_ENT_FL_CONNECTOR;
+		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
+
+		switch (INPUT(i)->type) {
+		case CX231XX_VMUX_COMPOSITE1:
+			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
+			break;
+		case CX231XX_VMUX_SVIDEO:
+			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
+			break;
+		case CX231XX_VMUX_TELEVISION:
+		case CX231XX_VMUX_CABLE:
+		case CX231XX_VMUX_DVB:
+			/* The DVB core will handle it */
+			if (dev->tuner_type == TUNER_ABSENT)
+				continue;
+			/* fall through */
+		default: /* just to shut up a gcc 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 cx231xx_enum_input(struct file *file, void *priv,
+			     struct v4l2_input *i)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	u32 gen_stat;
+	unsigned int n;
+	int ret;
+
+	n = i->index;
+	if (n >= MAX_CX231XX_INPUT)
+		return -EINVAL;
+	if (0 == INPUT(n)->type)
+		return -EINVAL;
+
+	i->index = n;
+	i->type = V4L2_INPUT_TYPE_CAMERA;
+
+	strcpy(i->name, iname[INPUT(n)->type]);
+
+	if ((CX231XX_VMUX_TELEVISION == INPUT(n)->type) ||
+	    (CX231XX_VMUX_CABLE == INPUT(n)->type))
+		i->type = V4L2_INPUT_TYPE_TUNER;
+
+	i->std = dev->vdev.tvnorms;
+
+	/* If they are asking about the active input, read signal status */
+	if (n == dev->video_input) {
+		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+					    GEN_STAT, 2, &gen_stat, 4);
+		if (ret > 0) {
+			if ((gen_stat & FLD_VPRES) == 0x00)
+				i->status |= V4L2_IN_ST_NO_SIGNAL;
+			if ((gen_stat & FLD_HLOCK) == 0x00)
+				i->status |= V4L2_IN_ST_NO_H_LOCK;
+		}
+	}
+
+	return 0;
+}
+
+int cx231xx_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	*i = dev->video_input;
+
+	return 0;
+}
+
+int cx231xx_s_input(struct file *file, void *priv, unsigned int i)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	dev->mode_tv = 0;
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (i >= MAX_CX231XX_INPUT)
+		return -EINVAL;
+	if (0 == INPUT(i)->type)
+		return -EINVAL;
+
+	video_mux(dev, i);
+
+	if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
+	    INPUT(i)->type == CX231XX_VMUX_CABLE) {
+		/* There's a tuner, so reset the standard and put it on the
+		   last known frequency (since it was probably powered down
+		   until now */
+		call_all(dev, video, s_std, dev->norm);
+	}
+
+	return 0;
+}
+
+int cx231xx_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (0 != t->index)
+		return -EINVAL;
+
+	strcpy(t->name, "Tuner");
+
+	t->type = V4L2_TUNER_ANALOG_TV;
+	t->capability = V4L2_TUNER_CAP_NORM;
+	t->rangehigh = 0xffffffffUL;
+	t->signal = 0xffff;	/* LOCKED */
+	call_all(dev, tuner, g_tuner, t);
+
+	return 0;
+}
+
+int cx231xx_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (0 != t->index)
+		return -EINVAL;
+#if 0
+	call_all(dev, tuner, s_tuner, t);
+#endif
+	return 0;
+}
+
+int cx231xx_g_frequency(struct file *file, void *priv,
+			      struct v4l2_frequency *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	if (f->tuner)
+		return -EINVAL;
+
+	f->frequency = dev->ctl_freq;
+
+	return 0;
+}
+
+int cx231xx_s_frequency(struct file *file, void *priv,
+			      const struct v4l2_frequency *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	struct v4l2_frequency new_freq = *f;
+	int rc;
+	u32 if_frequency = 5400000;
+
+	dev_dbg(dev->dev,
+		"Enter vidioc_s_frequency()f->frequency=%d;f->type=%d\n",
+		f->frequency, f->type);
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (0 != f->tuner)
+		return -EINVAL;
+
+	/* set pre channel change settings in DIF first */
+	rc = cx231xx_tuner_pre_channel_change(dev);
+
+	call_all(dev, tuner, s_frequency, f);
+	call_all(dev, tuner, g_frequency, &new_freq);
+	dev->ctl_freq = new_freq.frequency;
+
+	/* set post channel change settings in DIF first */
+	rc = cx231xx_tuner_post_channel_change(dev);
+
+	if (dev->tuner_type == TUNER_NXP_TDA18271) {
+		if (dev->norm & (V4L2_STD_MN | V4L2_STD_NTSC_443))
+			if_frequency = 5400000;  /*5.4MHz	*/
+		else if (dev->norm & V4L2_STD_B)
+			if_frequency = 6000000;  /*6.0MHz	*/
+		else if (dev->norm & (V4L2_STD_PAL_DK | V4L2_STD_SECAM_DK))
+			if_frequency = 6900000;  /*6.9MHz	*/
+		else if (dev->norm & V4L2_STD_GH)
+			if_frequency = 7100000;  /*7.1MHz	*/
+		else if (dev->norm & V4L2_STD_PAL_I)
+			if_frequency = 7250000;  /*7.25MHz	*/
+		else if (dev->norm & V4L2_STD_SECAM_L)
+			if_frequency = 6900000;  /*6.9MHz	*/
+		else if (dev->norm & V4L2_STD_SECAM_LC)
+			if_frequency = 1250000;  /*1.25MHz	*/
+
+		dev_dbg(dev->dev,
+			"if_frequency is set to %d\n", if_frequency);
+		cx231xx_set_Colibri_For_LowIF(dev, if_frequency, 1, 1);
+
+		update_HH_register_after_set_DIF(dev);
+	}
+
+	dev_dbg(dev->dev, "Set New FREQUENCY to %d\n", f->frequency);
+
+	return rc;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+
+int cx231xx_g_chip_info(struct file *file, void *fh,
+			struct v4l2_dbg_chip_info *chip)
+{
+	switch (chip->match.addr) {
+	case 0:	/* Cx231xx - internal registers */
+		return 0;
+	case 1:	/* AFE - read byte */
+		strlcpy(chip->name, "AFE (byte)", sizeof(chip->name));
+		return 0;
+	case 2:	/* Video Block - read byte */
+		strlcpy(chip->name, "Video (byte)", sizeof(chip->name));
+		return 0;
+	case 3:	/* I2S block - read byte */
+		strlcpy(chip->name, "I2S (byte)", sizeof(chip->name));
+		return 0;
+	case 4: /* AFE - read dword */
+		strlcpy(chip->name, "AFE (dword)", sizeof(chip->name));
+		return 0;
+	case 5: /* Video Block - read dword */
+		strlcpy(chip->name, "Video (dword)", sizeof(chip->name));
+		return 0;
+	case 6: /* I2S Block - read dword */
+		strlcpy(chip->name, "I2S (dword)", sizeof(chip->name));
+		return 0;
+	}
+	return -EINVAL;
+}
+
+int cx231xx_g_register(struct file *file, void *priv,
+			     struct v4l2_dbg_register *reg)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int ret;
+	u8 value[4] = { 0, 0, 0, 0 };
+	u32 data = 0;
+
+	switch (reg->match.addr) {
+	case 0:	/* Cx231xx - internal registers */
+		ret = cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER,
+				(u16)reg->reg, value, 4);
+		reg->val = value[0] | value[1] << 8 |
+			value[2] << 16 | (u32)value[3] << 24;
+		reg->size = 4;
+		break;
+	case 1:	/* AFE - read byte */
+		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
+				(u16)reg->reg, 2, &data, 1);
+		reg->val = data;
+		reg->size = 1;
+		break;
+	case 2:	/* Video Block - read byte */
+		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+				(u16)reg->reg, 2, &data, 1);
+		reg->val = data;
+		reg->size = 1;
+		break;
+	case 3:	/* I2S block - read byte */
+		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
+				(u16)reg->reg, 1, &data, 1);
+		reg->val = data;
+		reg->size = 1;
+		break;
+	case 4: /* AFE - read dword */
+		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
+				(u16)reg->reg, 2, &data, 4);
+		reg->val = data;
+		reg->size = 4;
+		break;
+	case 5: /* Video Block - read dword */
+		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+				(u16)reg->reg, 2, &data, 4);
+		reg->val = data;
+		reg->size = 4;
+		break;
+	case 6: /* I2S Block - read dword */
+		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
+				(u16)reg->reg, 1, &data, 4);
+		reg->val = data;
+		reg->size = 4;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return ret < 0 ? ret : 0;
+}
+
+int cx231xx_s_register(struct file *file, void *priv,
+			     const struct v4l2_dbg_register *reg)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int ret;
+	u8 data[4] = { 0, 0, 0, 0 };
+
+	switch (reg->match.addr) {
+	case 0:	/* cx231xx internal registers */
+		data[0] = (u8) reg->val;
+		data[1] = (u8) (reg->val >> 8);
+		data[2] = (u8) (reg->val >> 16);
+		data[3] = (u8) (reg->val >> 24);
+		ret = cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER,
+				(u16)reg->reg, data, 4);
+		break;
+	case 1:	/* AFE - write byte */
+		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
+				(u16)reg->reg, 2, reg->val, 1);
+		break;
+	case 2:	/* Video Block - write byte */
+		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+				(u16)reg->reg, 2, reg->val, 1);
+		break;
+	case 3:	/* I2S block - write byte */
+		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
+				(u16)reg->reg, 1, reg->val, 1);
+		break;
+	case 4: /* AFE - write dword */
+		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
+				(u16)reg->reg, 2, reg->val, 4);
+		break;
+	case 5: /* Video Block - write dword */
+		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+				(u16)reg->reg, 2, reg->val, 4);
+		break;
+	case 6: /* I2S block - write dword */
+		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
+				(u16)reg->reg, 1, reg->val, 4);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return ret < 0 ? ret : 0;
+}
+#endif
+
+static int vidioc_cropcap(struct file *file, void *priv,
+			  struct v4l2_cropcap *cc)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	bool is_50hz = dev->norm & V4L2_STD_625_50;
+
+	if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	cc->bounds.left = 0;
+	cc->bounds.top = 0;
+	cc->bounds.width = dev->width;
+	cc->bounds.height = dev->height;
+	cc->defrect = cc->bounds;
+	cc->pixelaspect.numerator = is_50hz ? 54 : 11;
+	cc->pixelaspect.denominator = is_50hz ? 59 : 10;
+
+	return 0;
+}
+
+static int vidioc_streamon(struct file *file, void *priv,
+			   enum v4l2_buf_type type)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	rc = res_get(fh);
+
+	if (likely(rc >= 0))
+		rc = videobuf_streamon(&fh->vb_vidq);
+
+	call_all(dev, video, s_stream, 1);
+
+	return rc;
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+			    enum v4l2_buf_type type)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if (type != fh->type)
+		return -EINVAL;
+
+	cx25840_call(dev, video, s_stream, 0);
+
+	videobuf_streamoff(&fh->vb_vidq);
+	res_free(fh);
+
+	return 0;
+}
+
+int cx231xx_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	strlcpy(cap->driver, "cx231xx", sizeof(cap->driver));
+	strlcpy(cap->card, cx231xx_boards[dev->model].name, sizeof(cap->card));
+	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
+
+	if (vdev->vfl_type == VFL_TYPE_RADIO)
+		cap->device_caps = V4L2_CAP_RADIO;
+	else {
+		cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
+		if (vdev->vfl_type == VFL_TYPE_VBI)
+			cap->device_caps |= V4L2_CAP_VBI_CAPTURE;
+		else
+			cap->device_caps |= V4L2_CAP_VIDEO_CAPTURE;
+	}
+	if (dev->tuner_type != TUNER_ABSENT)
+		cap->device_caps |= V4L2_CAP_TUNER;
+	cap->capabilities = cap->device_caps | V4L2_CAP_READWRITE |
+		V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
+		V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
+	if (video_is_registered(&dev->radio_dev))
+		cap->capabilities |= V4L2_CAP_RADIO;
+
+	return 0;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	if (unlikely(f->index >= ARRAY_SIZE(format)))
+		return -EINVAL;
+
+	strlcpy(f->description, format[f->index].name, sizeof(f->description));
+	f->pixelformat = format[f->index].fourcc;
+
+	return 0;
+}
+
+/* RAW VBI ioctls */
+
+static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	f->fmt.vbi.sampling_rate = 6750000 * 4;
+	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
+	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+	f->fmt.vbi.offset = 0;
+	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
+	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_LINES : NTSC_VBI_LINES;
+	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
+	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
+	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
+
+	return 0;
+
+}
+
+static int vidioc_try_fmt_vbi_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	f->fmt.vbi.sampling_rate = 6750000 * 4;
+	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
+	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+	f->fmt.vbi.offset = 0;
+	f->fmt.vbi.flags = 0;
+	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
+	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_LINES : NTSC_VBI_LINES;
+	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
+	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
+	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
+	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
+
+	return 0;
+
+}
+
+static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+
+	if (dev->vbi_stream_on && !fh->stream_on) {
+		dev_err(dev->dev,
+			"%s device in use by another fh\n", __func__);
+		return -EBUSY;
+	}
+	return vidioc_try_fmt_vbi_cap(file, priv, f);
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+			  struct v4l2_requestbuffers *rb)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	return videobuf_reqbufs(&fh->vb_vidq, rb);
+}
+
+static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	return videobuf_querybuf(&fh->vb_vidq, b);
+}
+
+static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	return videobuf_qbuf(&fh->vb_vidq, b);
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+	struct cx231xx_fh *fh = priv;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
+}
+
+/* ----------------------------------------------------------- */
+/* RADIO ESPECIFIC IOCTLS                                      */
+/* ----------------------------------------------------------- */
+
+static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
+{
+	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
+
+	if (t->index)
+		return -EINVAL;
+
+	strcpy(t->name, "Radio");
+
+	call_all(dev, tuner, g_tuner, t);
+
+	return 0;
+}
+static int radio_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
+{
+	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
+
+	if (t->index)
+		return -EINVAL;
+
+	call_all(dev, tuner, s_tuner, t);
+
+	return 0;
+}
+
+/*
+ * cx231xx_v4l2_open()
+ * inits the device and starts isoc transfer
+ */
+static int cx231xx_v4l2_open(struct file *filp)
+{
+	int radio = 0;
+	struct video_device *vdev = video_devdata(filp);
+	struct cx231xx *dev = video_drvdata(filp);
+	struct cx231xx_fh *fh;
+	enum v4l2_buf_type fh_type = 0;
+
+	switch (vdev->vfl_type) {
+	case VFL_TYPE_GRABBER:
+		fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		break;
+	case VFL_TYPE_VBI:
+		fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
+		break;
+	case VFL_TYPE_RADIO:
+		radio = 1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	cx231xx_videodbg("open dev=%s type=%s users=%d\n",
+			 video_device_node_name(vdev), v4l2_type_names[fh_type],
+			 dev->users);
+
+#if 0
+	errCode = cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
+	if (errCode < 0) {
+		dev_err(dev->dev,
+			"Device locked on digital mode. Can't open analog\n");
+		return -EBUSY;
+	}
+#endif
+
+	fh = kzalloc(sizeof(struct cx231xx_fh), GFP_KERNEL);
+	if (!fh)
+		return -ENOMEM;
+	if (mutex_lock_interruptible(&dev->lock)) {
+		kfree(fh);
+		return -ERESTARTSYS;
+	}
+	fh->dev = dev;
+	fh->type = fh_type;
+	filp->private_data = fh;
+	v4l2_fh_init(&fh->fh, vdev);
+
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
+		/* Power up in Analog TV mode */
+		if (dev->board.external_av)
+			cx231xx_set_power_mode(dev,
+				 POLARIS_AVMODE_ENXTERNAL_AV);
+		else
+			cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
+
+#if 0
+		cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
+#endif
+
+		/* set video alternate setting */
+		cx231xx_set_video_alternate(dev);
+
+		/* Needed, since GPIO might have disabled power of
+		   some i2c device */
+		cx231xx_config_i2c(dev);
+
+		/* device needs to be initialized before isoc transfer */
+		dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
+
+	}
+	if (radio) {
+		cx231xx_videodbg("video_open: setting radio device\n");
+
+		/* cx231xx_start_radio(dev); */
+
+		call_all(dev, tuner, s_radio);
+	}
+
+	dev->users++;
+
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_video_qops,
+					    NULL, &dev->video_mode.slock,
+					    fh->type, V4L2_FIELD_INTERLACED,
+					    sizeof(struct cx231xx_buffer),
+					    fh, &dev->lock);
+	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		/* Set the required alternate setting  VBI interface works in
+		   Bulk mode only */
+		cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
+
+		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_vbi_qops,
+					    NULL, &dev->vbi_mode.slock,
+					    fh->type, V4L2_FIELD_SEQ_TB,
+					    sizeof(struct cx231xx_buffer),
+					    fh, &dev->lock);
+	}
+	mutex_unlock(&dev->lock);
+	v4l2_fh_add(&fh->fh);
+
+	return 0;
+}
+
+/*
+ * cx231xx_realease_resources()
+ * unregisters the v4l2,i2c and usb devices
+ * called when the device gets disconected or at module unload
+*/
+void cx231xx_release_analog_resources(struct cx231xx *dev)
+{
+
+	/*FIXME: I2C IR should be disconnected */
+
+	if (video_is_registered(&dev->radio_dev))
+		video_unregister_device(&dev->radio_dev);
+	if (video_is_registered(&dev->vbi_dev)) {
+		dev_info(dev->dev, "V4L2 device %s deregistered\n",
+			video_device_node_name(&dev->vbi_dev));
+		video_unregister_device(&dev->vbi_dev);
+	}
+	if (video_is_registered(&dev->vdev)) {
+		dev_info(dev->dev, "V4L2 device %s deregistered\n",
+			video_device_node_name(&dev->vdev));
+
+		if (dev->board.has_417)
+			cx231xx_417_unregister(dev);
+
+		video_unregister_device(&dev->vdev);
+	}
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+	v4l2_ctrl_handler_free(&dev->radio_ctrl_handler);
+}
+
+/*
+ * cx231xx_close()
+ * stops streaming and deallocates all resources allocated by the v4l2
+ * calls and ioctls
+ */
+static int cx231xx_close(struct file *filp)
+{
+	struct cx231xx_fh *fh = filp->private_data;
+	struct cx231xx *dev = fh->dev;
+
+	cx231xx_videodbg("users=%d\n", dev->users);
+
+	cx231xx_videodbg("users=%d\n", dev->users);
+	if (res_check(fh))
+		res_free(fh);
+
+	/*
+	 * To workaround error number=-71 on EP0 for VideoGrabber,
+	 *	 need exclude following.
+	 * FIXME: It is probably safe to remove most of these, as we're
+	 * now avoiding the alternate setting for INDEX_VANC
+	 */
+	if (!dev->board.no_alt_vanc)
+		if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+			videobuf_stop(&fh->vb_vidq);
+			videobuf_mmap_free(&fh->vb_vidq);
+
+			/* the device is already disconnect,
+			   free the remaining resources */
+			if (dev->state & DEV_DISCONNECTED) {
+				if (atomic_read(&dev->devlist_count) > 0) {
+					cx231xx_release_resources(dev);
+					fh->dev = NULL;
+					return 0;
+				}
+				return 0;
+			}
+
+			/* do this before setting alternate! */
+			cx231xx_uninit_vbi_isoc(dev);
+
+			/* set alternate 0 */
+			if (!dev->vbi_or_sliced_cc_mode)
+				cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
+			else
+				cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
+
+			v4l2_fh_del(&fh->fh);
+			v4l2_fh_exit(&fh->fh);
+			kfree(fh);
+			dev->users--;
+			wake_up_interruptible(&dev->open);
+			return 0;
+		}
+
+	v4l2_fh_del(&fh->fh);
+	dev->users--;
+	if (!dev->users) {
+		videobuf_stop(&fh->vb_vidq);
+		videobuf_mmap_free(&fh->vb_vidq);
+
+		/* the device is already disconnect,
+		   free the remaining resources */
+		if (dev->state & DEV_DISCONNECTED) {
+			cx231xx_release_resources(dev);
+			fh->dev = NULL;
+			return 0;
+		}
+
+		/* Save some power by putting tuner to sleep */
+		call_all(dev, tuner, standby);
+
+		/* do this before setting alternate! */
+		if (dev->USE_ISO)
+			cx231xx_uninit_isoc(dev);
+		else
+			cx231xx_uninit_bulk(dev);
+		cx231xx_set_mode(dev, CX231XX_SUSPEND);
+
+		/* set alternate 0 */
+		cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
+	}
+	v4l2_fh_exit(&fh->fh);
+	kfree(fh);
+	wake_up_interruptible(&dev->open);
+	return 0;
+}
+
+static int cx231xx_v4l2_close(struct file *filp)
+{
+	struct cx231xx_fh *fh = filp->private_data;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	mutex_lock(&dev->lock);
+	rc = cx231xx_close(filp);
+	mutex_unlock(&dev->lock);
+	return rc;
+}
+
+/*
+ * cx231xx_v4l2_read()
+ * will allocate buffers when called for the first time
+ */
+static ssize_t
+cx231xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
+		  loff_t *pos)
+{
+	struct cx231xx_fh *fh = filp->private_data;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	if ((fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
+	    (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)) {
+		rc = res_get(fh);
+
+		if (unlikely(rc < 0))
+			return rc;
+
+		if (mutex_lock_interruptible(&dev->lock))
+			return -ERESTARTSYS;
+		rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
+					    filp->f_flags & O_NONBLOCK);
+		mutex_unlock(&dev->lock);
+		return rc;
+	}
+	return 0;
+}
+
+/*
+ * cx231xx_v4l2_poll()
+ * will allocate buffers when called for the first time
+ */
+static __poll_t cx231xx_v4l2_poll(struct file *filp, poll_table *wait)
+{
+	__poll_t req_events = poll_requested_events(wait);
+	struct cx231xx_fh *fh = filp->private_data;
+	struct cx231xx *dev = fh->dev;
+	__poll_t res = 0;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return EPOLLERR;
+
+	rc = res_get(fh);
+
+	if (unlikely(rc < 0))
+		return EPOLLERR;
+
+	if (v4l2_event_pending(&fh->fh))
+		res |= EPOLLPRI;
+	else
+		poll_wait(filp, &fh->fh.wait, wait);
+
+	if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
+		return res;
+
+	if ((V4L2_BUF_TYPE_VIDEO_CAPTURE == fh->type) ||
+	    (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)) {
+		mutex_lock(&dev->lock);
+		res |= videobuf_poll_stream(filp, &fh->vb_vidq, wait);
+		mutex_unlock(&dev->lock);
+		return res;
+	}
+	return res | EPOLLERR;
+}
+
+/*
+ * cx231xx_v4l2_mmap()
+ */
+static int cx231xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct cx231xx_fh *fh = filp->private_data;
+	struct cx231xx *dev = fh->dev;
+	int rc;
+
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	rc = res_get(fh);
+
+	if (unlikely(rc < 0))
+		return rc;
+
+	if (mutex_lock_interruptible(&dev->lock))
+		return -ERESTARTSYS;
+	rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
+	mutex_unlock(&dev->lock);
+
+	cx231xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
+			 (unsigned long)vma->vm_start,
+			 (unsigned long)vma->vm_end -
+			 (unsigned long)vma->vm_start, rc);
+
+	return rc;
+}
+
+static const struct v4l2_file_operations cx231xx_v4l_fops = {
+	.owner   = THIS_MODULE,
+	.open    = cx231xx_v4l2_open,
+	.release = cx231xx_v4l2_close,
+	.read    = cx231xx_v4l2_read,
+	.poll    = cx231xx_v4l2_poll,
+	.mmap    = cx231xx_v4l2_mmap,
+	.unlocked_ioctl   = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops video_ioctl_ops = {
+	.vidioc_querycap               = cx231xx_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_try_fmt_vbi_cap,
+	.vidioc_s_fmt_vbi_cap          = vidioc_s_fmt_vbi_cap,
+	.vidioc_cropcap                = vidioc_cropcap,
+	.vidioc_reqbufs                = vidioc_reqbufs,
+	.vidioc_querybuf               = vidioc_querybuf,
+	.vidioc_qbuf                   = vidioc_qbuf,
+	.vidioc_dqbuf                  = vidioc_dqbuf,
+	.vidioc_s_std                  = vidioc_s_std,
+	.vidioc_g_std                  = vidioc_g_std,
+	.vidioc_enum_input             = cx231xx_enum_input,
+	.vidioc_g_input                = cx231xx_g_input,
+	.vidioc_s_input                = cx231xx_s_input,
+	.vidioc_streamon               = vidioc_streamon,
+	.vidioc_streamoff              = vidioc_streamoff,
+	.vidioc_g_tuner                = cx231xx_g_tuner,
+	.vidioc_s_tuner                = cx231xx_s_tuner,
+	.vidioc_g_frequency            = cx231xx_g_frequency,
+	.vidioc_s_frequency            = cx231xx_s_frequency,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.vidioc_g_chip_info            = cx231xx_g_chip_info,
+	.vidioc_g_register             = cx231xx_g_register,
+	.vidioc_s_register             = cx231xx_s_register,
+#endif
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static struct video_device cx231xx_vbi_template;
+
+static const struct video_device cx231xx_video_template = {
+	.fops         = &cx231xx_v4l_fops,
+	.release      = video_device_release_empty,
+	.ioctl_ops    = &video_ioctl_ops,
+	.tvnorms      = V4L2_STD_ALL,
+};
+
+static const struct v4l2_file_operations radio_fops = {
+	.owner   = THIS_MODULE,
+	.open   = cx231xx_v4l2_open,
+	.release = cx231xx_v4l2_close,
+	.poll = v4l2_ctrl_poll,
+	.unlocked_ioctl = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops radio_ioctl_ops = {
+	.vidioc_querycap    = cx231xx_querycap,
+	.vidioc_g_tuner     = radio_g_tuner,
+	.vidioc_s_tuner     = radio_s_tuner,
+	.vidioc_g_frequency = cx231xx_g_frequency,
+	.vidioc_s_frequency = cx231xx_s_frequency,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.vidioc_g_chip_info = cx231xx_g_chip_info,
+	.vidioc_g_register  = cx231xx_g_register,
+	.vidioc_s_register  = cx231xx_s_register,
+#endif
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static struct video_device cx231xx_radio_template = {
+	.name      = "cx231xx-radio",
+	.fops      = &radio_fops,
+	.ioctl_ops = &radio_ioctl_ops,
+};
+
+/******************************** usb interface ******************************/
+
+static void cx231xx_vdev_init(struct cx231xx *dev,
+		struct video_device *vfd,
+		const struct video_device *template,
+		const char *type_name)
+{
+	*vfd = *template;
+	vfd->v4l2_dev = &dev->v4l2_dev;
+	vfd->release = video_device_release_empty;
+	vfd->lock = &dev->lock;
+
+	snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);
+
+	video_set_drvdata(vfd, dev);
+	if (dev->tuner_type == TUNER_ABSENT) {
+		v4l2_disable_ioctl(vfd, VIDIOC_G_FREQUENCY);
+		v4l2_disable_ioctl(vfd, VIDIOC_S_FREQUENCY);
+		v4l2_disable_ioctl(vfd, VIDIOC_G_TUNER);
+		v4l2_disable_ioctl(vfd, VIDIOC_S_TUNER);
+	}
+}
+
+int cx231xx_register_analog_devices(struct cx231xx *dev)
+{
+	int ret;
+
+	dev_info(dev->dev, "v4l2 driver version %s\n", CX231XX_VERSION);
+
+	/* set default norm */
+	dev->norm = V4L2_STD_PAL;
+	dev->width = norm_maxw(dev);
+	dev->height = norm_maxh(dev);
+	dev->interlaced = 0;
+
+	/* Analog specific initialization */
+	dev->format = &format[0];
+
+	/* Set the initial input */
+	video_mux(dev, dev->video_input);
+
+	call_all(dev, video, s_std, dev->norm);
+
+	v4l2_ctrl_handler_init(&dev->ctrl_handler, 10);
+	v4l2_ctrl_handler_init(&dev->radio_ctrl_handler, 5);
+
+	if (dev->sd_cx25840) {
+		v4l2_ctrl_add_handler(&dev->ctrl_handler,
+				dev->sd_cx25840->ctrl_handler, NULL);
+		v4l2_ctrl_add_handler(&dev->radio_ctrl_handler,
+				dev->sd_cx25840->ctrl_handler,
+				v4l2_ctrl_radio_filter);
+	}
+
+	if (dev->ctrl_handler.error)
+		return dev->ctrl_handler.error;
+	if (dev->radio_ctrl_handler.error)
+		return dev->radio_ctrl_handler.error;
+
+	/* enable vbi capturing */
+	/* write code here...  */
+
+	/* allocate and fill video video_device struct */
+	cx231xx_vdev_init(dev, &dev->vdev, &cx231xx_video_template, "video");
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	dev->video_pad.flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
+	if (ret < 0)
+		dev_err(dev->dev, "failed to initialize video media entity!\n");
+#endif
+	dev->vdev.ctrl_handler = &dev->ctrl_handler;
+	/* register v4l2 video video_device */
+	ret = video_register_device(&dev->vdev, VFL_TYPE_GRABBER,
+				    video_nr[dev->devno]);
+	if (ret) {
+		dev_err(dev->dev,
+			"unable to register video device (error=%i).\n",
+			ret);
+		return ret;
+	}
+
+	dev_info(dev->dev, "Registered video device %s [v4l2]\n",
+		video_device_node_name(&dev->vdev));
+
+	/* Initialize VBI template */
+	cx231xx_vbi_template = cx231xx_video_template;
+	strcpy(cx231xx_vbi_template.name, "cx231xx-vbi");
+
+	/* Allocate and fill vbi video_device struct */
+	cx231xx_vdev_init(dev, &dev->vbi_dev, &cx231xx_vbi_template, "vbi");
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
+	if (ret < 0)
+		dev_err(dev->dev, "failed to initialize vbi media entity!\n");
+#endif
+	dev->vbi_dev.ctrl_handler = &dev->ctrl_handler;
+	/* register v4l2 vbi video_device */
+	ret = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI,
+				    vbi_nr[dev->devno]);
+	if (ret < 0) {
+		dev_err(dev->dev, "unable to register vbi device\n");
+		return ret;
+	}
+
+	dev_info(dev->dev, "Registered VBI device %s\n",
+		video_device_node_name(&dev->vbi_dev));
+
+	if (cx231xx_boards[dev->model].radio.type == CX231XX_RADIO) {
+		cx231xx_vdev_init(dev, &dev->radio_dev,
+				&cx231xx_radio_template, "radio");
+		dev->radio_dev.ctrl_handler = &dev->radio_ctrl_handler;
+		ret = video_register_device(&dev->radio_dev, VFL_TYPE_RADIO,
+					    radio_nr[dev->devno]);
+		if (ret < 0) {
+			dev_err(dev->dev,
+				"can't register radio device\n");
+			return ret;
+		}
+		dev_info(dev->dev, "Registered radio device as %s\n",
+			video_device_node_name(&dev->radio_dev));
+	}
+
+	return 0;
+}