V4L/DVB (12770): Add tm6000 driver to staging tree

Adds a driver for Trident TV Master tm5600/tm6000 chips.

Those USB devices are usually found with a Xceive xc2028/xc3028
tuner, although the firmware seems to be modified to work with
those chips on some older devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 1559 insertions, 0 deletions

diff --git a/drivers/staging/tm6000/tm6000-video.c b/drivers/staging/tm6000/tm6000-video.c
new file mode 100644
index 000000000000..970f3a11308d
--- /dev/null
+++ b/drivers/staging/tm6000/tm6000-video.c
@@ -0,0 +1,1559 @@
+/*
+   tm6000-video.c - driver for TM5600/TM6000 USB video capture devices
+
+   Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
+
+   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 version 2
+
+   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 <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+#include <linux/version.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+#include <linux/videodev.h>
+#endif
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/highmem.h>
+#include <linux/freezer.h>
+
+#include "tm6000-regs.h"
+#include "tm6000.h"
+
+#define BUFFER_TIMEOUT     msecs_to_jiffies(2000)  /* 2 seconds */
+
+/* Declare static vars that will be used as parameters */
+static unsigned int vid_limit = 16;	/* Video memory limit, in Mb */
+static int video_nr = -1;		/* /dev/videoN, -1 for autodetect */
+
+unsigned long tm6000_devused;
+
+/* Debug level */
+int tm6000_debug;
+
+/* supported controls */
+static struct v4l2_queryctrl tm6000_qctrl[] = {
+	{
+		.id            = V4L2_CID_BRIGHTNESS,
+		.type          = V4L2_CTRL_TYPE_INTEGER,
+		.name          = "Brightness",
+		.minimum       = 0,
+		.maximum       = 255,
+		.step          = 1,
+		.default_value = 54,
+		.flags         = 0,
+	}, {
+		.id            = V4L2_CID_CONTRAST,
+		.type          = V4L2_CTRL_TYPE_INTEGER,
+		.name          = "Contrast",
+		.minimum       = 0,
+		.maximum       = 255,
+		.step          = 0x1,
+		.default_value = 119,
+		.flags         = 0,
+	}, {
+		.id            = V4L2_CID_SATURATION,
+		.type          = V4L2_CTRL_TYPE_INTEGER,
+		.name          = "Saturation",
+		.minimum       = 0,
+		.maximum       = 255,
+		.step          = 0x1,
+		.default_value = 112,
+		.flags         = 0,
+	}, {
+		.id            = V4L2_CID_HUE,
+		.type          = V4L2_CTRL_TYPE_INTEGER,
+		.name          = "Hue",
+		.minimum       = -128,
+		.maximum       = 127,
+		.step          = 0x1,
+		.default_value = 0,		//4 ?
+		.flags         = 0,
+	}
+};
+
+static int qctl_regs[ARRAY_SIZE(tm6000_qctrl)];
+
+static struct tm6000_fmt format[] = {
+	{
+		.name     = "4:2:2, packed, YVY2",
+		.fourcc   = V4L2_PIX_FMT_YUYV,
+		.depth    = 16,
+	},{
+		.name     = "4:2:2, packed, UYVY",
+		.fourcc   = V4L2_PIX_FMT_UYVY,
+		.depth    = 16,
+	},{
+		.name     = "A/V + VBI mux packet",
+		.fourcc   = V4L2_PIX_FMT_TM6000,
+		.depth    = 16,
+	}
+};
+
+static LIST_HEAD(tm6000_corelist);
+
+/* ------------------------------------------------------------------
+	DMA and thread functions
+   ------------------------------------------------------------------*/
+
+#define norm_maxw(a) 720
+#define norm_maxh(a) 480
+
+//#define norm_minw(a) norm_maxw(a)
+#define norm_minw(a) norm_maxw(a)
+#define norm_minh(a) norm_maxh(a)
+
+/*
+ * video-buf generic routine to get the next available buffer
+ */
+static int inline get_next_buf (struct tm6000_dmaqueue *dma_q,
+					  struct tm6000_buffer    **buf)
+{
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+
+	if (list_empty(&dma_q->active)) {
+		dprintk(dev, V4L2_DEBUG_QUEUE,"No active queue to serve\n");
+		return 0;
+	}
+
+	*buf = list_entry(dma_q->active.next,
+			struct tm6000_buffer, vb.queue);
+
+	/* Nobody is waiting something to be done, just return */
+	if (!waitqueue_active(&(*buf)->vb.done)) {
+		mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
+		return -1;
+	}
+
+	return 1;
+}
+
+/*
+ * Announces that a buffer were filled and request the next
+ */
+static void inline buffer_filled (struct tm6000_core *dev,
+				  struct tm6000_buffer *buf)
+{
+	/* Advice that buffer was filled */
+	dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] wakeup\n",buf,buf->vb.i);
+	buf->vb.state = STATE_DONE;
+	buf->vb.field_count++;
+	do_gettimeofday(&buf->vb.ts);
+
+	list_del(&buf->vb.queue);
+	wake_up(&buf->vb.done);
+}
+
+/*
+ * Macro to allow copying data into the proper memory type
+ */
+
+#define bufcpy(buf,out_ptr,in_ptr,size) 				\
+	{								\
+		if (__copy_to_user(out_ptr,in_ptr,size)!=0)		\
+			tm6000_err("copy_to_user failed.\n");		\
+	}
+
+/*
+ * Identify the tm5600/6000 buffer header type and properly handles
+ */
+static int copy_streams(u8 *data, u8 *out_p, unsigned long len,
+			struct urb *urb, struct tm6000_buffer **buf)
+{
+	struct tm6000_dmaqueue  *dma_q = urb->context;
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+	u8 *ptr=data, *endp=data+len;
+	u8 c;
+	unsigned int cmd, cpysize, pktsize, size, field, block, line, pos=0;
+	unsigned long header;
+	int rc=0;
+
+	/* FIXME: this is the hardcoded window size
+	 */
+	unsigned int linesize=720*2;
+
+//static int last_line=-2;
+
+	for (ptr=data; ptr<endp;) {
+		if (!dev->isoc_ctl.cmd) {
+			/* Seek for sync */
+			for (ptr+=3;ptr<endp;ptr++) {
+				if (*ptr==0x47) {
+					ptr-=3;
+					break;
+				}
+			}
+			if (ptr>=endp)
+				return rc;
+
+			/* Get message header */
+			header=*(unsigned long *)ptr;
+			ptr+=4;
+			c=(header>>24) & 0xff;
+
+			/* split the header fields */
+			size  = (((header & 0x7e)<<1) -1) *4;
+			block = (header>>7) & 0xf;
+			field = (header>>11) & 0x1;
+			line  = (header>>12) & 0x1ff;
+			cmd   = (header>>21) & 0x7;
+
+			/* FIXME: Maximum possible line is 511.
+			 * This doesn't seem to be enough for PAL standards
+			 */
+
+			/* Validates header fields */
+			if(size>TM6000_URB_MSG_LEN)
+				size=TM6000_URB_MSG_LEN;
+			if(block>=8)
+				cmd = TM6000_URB_MSG_ERR;
+
+			/* FIXME: Mounts the image as field0+field1
+			 * It should, instead, check if the user selected
+			 * entrelaced or non-entrelaced mode
+			 */
+			pos=((line<<1)+field)*linesize+
+						block*TM6000_URB_MSG_LEN;
+
+
+
+			/* Don't allow to write out of the buffer */
+			if (pos+TM6000_URB_MSG_LEN > (*buf)->vb.size)
+				cmd = TM6000_URB_MSG_ERR;
+
+			/* Prints debug info */
+			dprintk(dev, V4L2_DEBUG_ISOC, "size=%d, num=%d, "
+					" line=%d, field=%d\n",
+					size, block, line, field);
+
+			dev->isoc_ctl.cmd  = cmd;
+			dev->isoc_ctl.size = size;
+			dev->isoc_ctl.pos  = pos;
+			dev->isoc_ctl.pktsize = pktsize = TM6000_URB_MSG_LEN;
+		} else {
+			cmd = dev->isoc_ctl.cmd;
+			size= dev->isoc_ctl.size;
+			pos = dev->isoc_ctl.pos;
+			pktsize = dev->isoc_ctl.pktsize;
+		}
+		cpysize=(endp-ptr>size)?size:endp-ptr;
+
+		if (cpysize) {
+			/* handles each different URB message */
+			switch(cmd) {
+			case TM6000_URB_MSG_VIDEO:
+				/* Fills video buffer */
+				bufcpy(*buf,&out_p[pos],ptr,cpysize);
+			break;
+			}
+		}
+		if (cpysize<size) {
+			/* End of URB packet, but cmd processing is not
+			 * complete. Preserve the state for a next packet
+			 */
+			dev->isoc_ctl.pos = pos+cpysize;
+			dev->isoc_ctl.size= size-cpysize;
+			dev->isoc_ctl.cmd = cmd;
+			dev->isoc_ctl.pktsize = pktsize-cpysize;
+			ptr+=cpysize;
+		} else {
+			dev->isoc_ctl.cmd = 0;
+			ptr+=pktsize;
+		}
+	}
+
+	return rc;
+}
+/*
+ * Identify the tm5600/6000 buffer header type and properly handles
+ */
+static int copy_multiplexed(u8 *ptr, u8 *out_p, unsigned long len,
+			struct urb *urb, struct tm6000_buffer **buf)
+{
+	struct tm6000_dmaqueue  *dma_q = urb->context;
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+	unsigned int pos=dev->isoc_ctl.pos,cpysize;
+	int rc=1;
+
+	while (len>0) {
+		cpysize=min(len,(*buf)->vb.size-pos);
+//printk("Copying %d bytes (max=%lu) from %p to %p[%u]\n",cpysize,(*buf)->vb.size,ptr,out_p,pos);
+		bufcpy(*buf,&out_p[pos],ptr,cpysize);
+		pos+=cpysize;
+		ptr+=cpysize;
+		len-=cpysize;
+		if (pos >= (*buf)->vb.size) {
+			pos=0;
+			/* Announces that a new buffer were filled */
+			buffer_filled (dev, *buf);
+			dprintk(dev, V4L2_DEBUG_QUEUE, "new buffer filled\n");
+
+			rc=get_next_buf (dma_q, buf);
+			if (rc<=0) {
+				*buf=NULL;
+				printk(KERN_ERR "tm6000: buffer underrun\n");
+				break;
+			}
+		}
+	}
+
+	dev->isoc_ctl.pos=pos;
+	return rc;
+}
+
+/*
+ * Controls the isoc copy of each urb packet
+ */
+static inline int tm6000_isoc_copy(struct urb *urb, struct tm6000_buffer **buf)
+{
+	struct tm6000_dmaqueue  *dma_q = urb->context;
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+	void *outp=videobuf_to_vmalloc (&((*buf)->vb));
+	int i, len=0, rc=1;
+	int size=(*buf)->vb.size;
+	char *p;
+	unsigned long copied;
+
+	copied=0;
+
+
+	for (i = 0; i < urb->number_of_packets; i++) {
+		int status = urb->iso_frame_desc[i].status;
+		char *errmsg = "Unknown";
+
+		switch(status) {
+		case -ENOENT:
+			errmsg = "unlinked synchronuously";
+			break;
+		case -ECONNRESET:
+			errmsg = "unlinked asynchronuously";
+			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;
+		}
+		dprintk(dev, V4L2_DEBUG_QUEUE, "URB status %d [%s].\n",
+			status, errmsg);
+
+		if (status<0)
+			continue;
+
+		len=urb->iso_frame_desc[i].actual_length;
+
+		if (len>=TM6000_URB_MSG_LEN) {
+			p=urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+			if (!urb->iso_frame_desc[i].status) {
+				if (((*buf)->fmt->fourcc)==V4L2_PIX_FMT_TM6000) {
+					rc=copy_multiplexed(p,outp,len,urb,buf);
+					if (rc<=0)
+						return rc;
+				} else {
+					rc=copy_streams(p,outp,len,urb,buf);
+				}
+			}
+			copied += len;
+			if (copied>=size)
+				break;
+		}
+	}
+
+	if (((*buf)->fmt->fourcc)!=V4L2_PIX_FMT_TM6000) {
+		buffer_filled (dev, *buf);
+		dprintk(dev, V4L2_DEBUG_QUEUE, "new buffer filled\n");
+	}
+
+	return rc;
+}
+
+/* ------------------------------------------------------------------
+	URB control
+   ------------------------------------------------------------------*/
+
+/*
+ * IRQ callback, called by URB callback
+ */
+static void tm6000_irq_callback(struct urb *urb)
+{
+	struct tm6000_buffer    *buf;
+	struct tm6000_dmaqueue  *dma_q = urb->context;
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+	int rc,i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->slock,flags);
+
+	rc=get_next_buf (dma_q, &buf);
+	if (rc<=0)
+		goto ret;
+
+	/* Copy data from URB */
+	rc=tm6000_isoc_copy(urb, &buf);
+
+ret:
+	/* 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;
+
+	if ((urb->status = usb_submit_urb(urb, GFP_ATOMIC))) {
+		tm6000_err("urb resubmit failed (error=%i)\n",
+			urb->status);
+	}
+
+	if (rc>=0) {
+		if (!rc) {
+			dprintk(dev, V4L2_DEBUG_QUEUE, "No active queue to serve\n");
+			del_timer(&dma_q->timeout);
+		} else {
+			/* Data filled, reset watchdog */
+			mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
+		}
+	}
+	spin_unlock_irqrestore(&dev->slock,flags);
+}
+
+/*
+ * Stop and Deallocate URBs
+ */
+static void tm6000_uninit_isoc(struct tm6000_core *dev)
+{
+	struct urb *urb;
+	int i;
+
+	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
+		urb=dev->isoc_ctl.urb[i];
+		if (urb) {
+			usb_kill_urb(urb);
+			usb_unlink_urb(urb);
+			if (dev->isoc_ctl.transfer_buffer[i]) {
+				usb_buffer_free(dev->udev,
+						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;
+}
+
+/*
+ * Stop video thread - FIXME: Can be easily removed
+ */
+static void tm6000_stop_thread(struct tm6000_dmaqueue  *dma_q)
+{
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+
+	tm6000_uninit_isoc(dev);
+}
+
+
+/*
+ * Allocate URBs and start IRQ
+ */
+static int tm6000_prepare_isoc(struct tm6000_core *dev,
+		     int max_packets, int num_bufs)
+{
+	struct tm6000_dmaqueue *dma_q = &dev->vidq;
+	int i;
+	int sb_size, pipe;
+	struct urb *urb;
+	int j, k;
+
+	/* De-allocates all pending stuff */
+	tm6000_uninit_isoc(dev);
+
+	dev->isoc_ctl.num_bufs=num_bufs;
+
+	dev->isoc_ctl.urb=kmalloc(sizeof(void *)*num_bufs,
+				   GFP_KERNEL);
+	if (!dev->isoc_ctl.urb) {
+		tm6000_err("cannot alloc memory for usb buffers\n");
+		return -ENOMEM;
+	}
+
+	dev->isoc_ctl.transfer_buffer=kmalloc(sizeof(void *)*num_bufs,
+				   GFP_KERNEL);
+	if (!dev->isoc_ctl.urb) {
+		tm6000_err("cannot allocate memory for usbtransfer\n");
+		kfree(dev->isoc_ctl.urb);
+		return -ENOMEM;
+	}
+
+	dev->isoc_ctl.max_pkt_size=dev->max_isoc_in;
+
+	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) {
+			tm6000_err("cannot alloc isoc_ctl.urb %i\n", i);
+			tm6000_uninit_isoc(dev);
+			return -ENOMEM;
+		}
+		dev->isoc_ctl.urb[i] = urb;
+
+		dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
+			sb_size, GFP_KERNEL,
+			&dev->isoc_ctl.urb[i]->transfer_dma);
+		if (!dev->isoc_ctl.transfer_buffer[i]) {
+			tm6000_err ("unable to allocate %i bytes for transfer"
+					" buffer %i\n", sb_size, i);
+			tm6000_uninit_isoc(dev);
+			return -ENOMEM;
+		}
+		memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
+
+		pipe=usb_rcvisocpipe(dev->udev,
+					dev->isoc_in->desc.bEndpointAddress &
+					USB_ENDPOINT_NUMBER_MASK);
+		usb_fill_int_urb(urb, dev->udev, pipe,
+					dev->isoc_ctl.transfer_buffer[i],sb_size,
+					tm6000_irq_callback, dma_q,
+					dev->isoc_in->desc.bInterval);
+
+		urb->number_of_packets = max_packets;
+		urb->transfer_flags = URB_ISO_ASAP;
+
+		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;
+		}
+	}
+
+	return 0;
+}
+
+static int tm6000_start_thread( struct tm6000_dmaqueue  *dma_q,
+				struct tm6000_buffer *buf)
+{
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+	int i,rc;
+
+	dma_q->frame=0;
+	dma_q->ini_jiffies=jiffies;
+
+	init_waitqueue_head(&dma_q->wq);
+
+	/* 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_KERNEL);
+		if (rc) {
+			tm6000_err("submit of urb %i failed (error=%i)\n", i,
+				   rc);
+			tm6000_uninit_isoc(dev);
+			return rc;
+		}
+	}
+
+	if (rc<0)
+		return rc;
+
+	return 0;
+}
+
+static int restart_video_queue(struct tm6000_dmaqueue *dma_q)
+{
+	struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
+
+	struct tm6000_buffer *buf, *prev;
+	struct list_head *item;
+
+	dprintk(dev, V4L2_DEBUG_QUEUE, "%s dma_q=0x%08lx\n",
+					 __FUNCTION__,(unsigned long)dma_q);
+
+	if (!list_empty(&dma_q->active)) {
+		buf = list_entry(dma_q->active.next, struct tm6000_buffer, vb.queue);
+		dprintk(dev, V4L2_DEBUG_QUEUE,
+			"restart_queue [%p/%d]: restart dma\n", buf, buf->vb.i);
+
+		dprintk(dev, V4L2_DEBUG_QUEUE, "Restarting video dma\n");
+		tm6000_stop_thread(dma_q);
+		tm6000_start_thread(dma_q, buf);
+
+		/* cancel all outstanding capture / vbi requests */
+		list_for_each(item,&dma_q->active) {
+			buf = list_entry(item, struct tm6000_buffer, vb.queue);
+
+			list_del(&buf->vb.queue);
+			buf->vb.state = STATE_ERROR;
+			wake_up(&buf->vb.done);
+		}
+		mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
+
+		return 0;
+	}
+
+	prev = NULL;
+	for (;;) {
+		if (list_empty(&dma_q->queued))
+			return 0;
+		buf = list_entry(dma_q->queued.next, struct tm6000_buffer, vb.queue);
+		if (NULL == prev) {
+			list_del(&buf->vb.queue);
+			list_add_tail(&buf->vb.queue,&dma_q->active);
+
+			dprintk(dev, V4L2_DEBUG_QUEUE, "Restarting video dma\n");
+			tm6000_stop_thread(dma_q);
+			tm6000_start_thread(dma_q, buf);
+
+			buf->vb.state = STATE_ACTIVE;
+			mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
+			dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] restart_queue -"
+					" first active\n", buf, buf->vb.i);
+
+		} else if (prev->vb.width  == buf->vb.width  &&
+			   prev->vb.height == buf->vb.height &&
+			   prev->fmt       == buf->fmt) {
+			list_del(&buf->vb.queue);
+			list_add_tail(&buf->vb.queue,&dma_q->active);
+			buf->vb.state = STATE_ACTIVE;
+			dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] restart_queue -"
+					" move to active\n",buf,buf->vb.i);
+		} else {
+			return 0;
+		}
+		prev = buf;
+	}
+}
+
+static void tm6000_vid_timeout(unsigned long data)
+{
+	struct tm6000_core      *dev  = (struct tm6000_core*)data;
+	struct tm6000_dmaqueue *vidq = &dev->vidq;
+	struct tm6000_buffer   *buf;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->slock,flags);
+	while (!list_empty(&vidq->active)) {
+		buf = list_entry(vidq->active.next, struct tm6000_buffer,
+								 vb.queue);
+		list_del(&buf->vb.queue);
+		buf->vb.state = STATE_ERROR;
+		wake_up(&buf->vb.done);
+		dprintk(dev, V4L2_DEBUG_QUEUE, "tm6000/0: [%p/%d] timeout\n",
+							 buf, buf->vb.i);
+	}
+
+	restart_video_queue(vidq);
+	spin_unlock_irqrestore(&dev->slock,flags);
+}
+
+/* ------------------------------------------------------------------
+	Videobuf operations
+   ------------------------------------------------------------------*/
+static int
+buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
+{
+	struct tm6000_fh *fh = vq->priv_data;
+
+	*size = fh->fmt->depth * fh->width * fh->height >> 3;
+	if (0 == *count)
+		*count = 32;
+	while (*size * *count > vid_limit * 1024 * 1024)
+		(*count)--;
+	return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct tm6000_buffer *buf)
+{
+	if (in_interrupt())
+		BUG();
+
+	videobuf_waiton(&buf->vb,0,0);
+	videobuf_vmalloc_free(&buf->vb);
+	buf->vb.state = STATE_NEEDS_INIT;
+}
+
+static int
+buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
+						enum v4l2_field field)
+{
+	struct tm6000_fh     *fh  = vq->priv_data;
+	struct tm6000_buffer *buf = container_of(vb,struct tm6000_buffer,vb);
+	struct tm6000_core   *dev = fh->dev;
+	int rc=0, urbsize, urb_init=0;
+
+	BUG_ON(NULL == fh->fmt);
+
+	if (fh->width  < norm_minw(core) || fh->width  > norm_maxw(core) ||
+	    fh->height < norm_minh(core) || fh->height > norm_maxh(core)) {
+		dprintk(dev, V4L2_DEBUG_QUEUE, "Window size (%dx%d) is out of "
+				"supported range\n", fh->width, fh->height);
+		dprintk(dev, V4L2_DEBUG_QUEUE, "Valid range is from (%dx%d) to "
+				"(%dx%d)\n", norm_minw(core), norm_minh(core),
+				norm_maxw(core),norm_maxh(core));
+		return -EINVAL;
+	}
+
+	/* FIXME: It assumes depth=2 */
+	/* The only currently supported format is 16 bits/pixel */
+	buf->vb.size = fh->fmt->depth*fh->width*fh->height >> 3;
+	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
+		return -EINVAL;
+
+	if (buf->fmt       != fh->fmt    ||
+	    buf->vb.width  != fh->width  ||
+	    buf->vb.height != fh->height ||
+	    buf->vb.field  != field) {
+		buf->fmt       = fh->fmt;
+		buf->vb.width  = fh->width;
+		buf->vb.height = fh->height;
+		buf->vb.field  = field;
+		buf->vb.state = STATE_NEEDS_INIT;
+	}
+
+	if (STATE_NEEDS_INIT == buf->vb.state) {
+		if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
+			goto fail;
+		urb_init=1;
+	}
+
+
+	if (!dev->isoc_ctl.num_bufs)
+		urb_init=1;
+
+	if (urb_init) {
+		/* Should allocate/request at least h
+		   res x v res x 2 bytes/pixel */
+		urbsize=(buf->vb.size+dev->max_isoc_in-1)/dev->max_isoc_in;
+
+		 /* Hack to allocate memory for Video + Audio */
+		/* FIXME: should also consider header ovehead of
+		   4 bytes/180 bytes */
+		urbsize+=((48000*4+24)/25+dev->max_isoc_in-1)/dev->max_isoc_in;
+
+		dprintk(dev, V4L2_DEBUG_QUEUE, "Allocating %d packets to handle "
+					"%lu size\n", urbsize,buf->vb.size);
+		rc = tm6000_prepare_isoc(dev, urbsize, 2);
+
+		if (rc<0)
+			goto fail;
+	}
+
+	buf->vb.state = STATE_PREPARED;
+	return 0;
+
+fail:
+	free_buffer(vq,buf);
+	return rc;
+}
+
+static void
+buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+	struct tm6000_buffer    *buf     = container_of(vb,struct tm6000_buffer,vb);
+	struct tm6000_fh        *fh      = vq->priv_data;
+	struct tm6000_core      *dev     = fh->dev;
+	struct tm6000_dmaqueue  *vidq    = &dev->vidq;
+	struct tm6000_buffer    *prev;
+
+	if (!list_empty(&vidq->queued)) {
+		list_add_tail(&buf->vb.queue,&vidq->queued);
+		buf->vb.state = STATE_QUEUED;
+		dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] buffer_queue - "
+					"append to queued\n", buf, buf->vb.i);
+	} else if (list_empty(&vidq->active)) {
+		list_add_tail(&buf->vb.queue,&vidq->active);
+		buf->vb.state = STATE_ACTIVE;
+		mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
+		dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] buffer_queue - "
+					"first active\n", buf, buf->vb.i);
+		tm6000_start_thread(vidq, buf);
+	} else {
+		prev = list_entry(vidq->active.prev, struct tm6000_buffer, vb.queue);
+		if (prev->vb.width  == buf->vb.width  &&
+		    prev->vb.height == buf->vb.height &&
+		    prev->fmt       == buf->fmt) {
+			list_add_tail(&buf->vb.queue,&vidq->active);
+			buf->vb.state = STATE_ACTIVE;
+			dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] buffer_queue -"
+					" append to active\n", buf, buf->vb.i);
+		} else {
+			list_add_tail(&buf->vb.queue,&vidq->queued);
+			buf->vb.state = STATE_QUEUED;
+			dprintk(dev, V4L2_DEBUG_QUEUE, "[%p/%d] buffer_queue -"
+					" first queued\n", buf, buf->vb.i);
+		}
+	}
+}
+
+static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+	struct tm6000_buffer   *buf  = container_of(vb,struct tm6000_buffer,vb);
+	struct tm6000_fh       *fh   = vq->priv_data;
+	struct tm6000_core      *dev  = (struct tm6000_core*)fh->dev;
+	struct tm6000_dmaqueue *vidq = &dev->vidq;
+
+	tm6000_stop_thread(vidq);
+
+	free_buffer(vq,buf);
+}
+
+static struct videobuf_queue_ops tm6000_video_qops = {
+	.buf_setup      = buffer_setup,
+	.buf_prepare    = buffer_prepare,
+	.buf_queue      = buffer_queue,
+	.buf_release    = buffer_release,
+};
+
+/* ------------------------------------------------------------------
+	IOCTL handling
+   ------------------------------------------------------------------*/
+
+static int res_get(struct tm6000_core *dev, struct tm6000_fh *fh)
+{
+	/* is it free? */
+	mutex_lock(&dev->lock);
+	if (dev->resources) {
+		/* no, someone else uses it */
+		mutex_unlock(&dev->lock);
+		return 0;
+	}
+	/* it's free, grab it */
+	dev->resources =1;
+	dprintk(dev, V4L2_DEBUG_RES_LOCK, "res: get\n");
+	mutex_unlock(&dev->lock);
+	return 1;
+}
+
+static int res_locked(struct tm6000_core *dev)
+{
+	return (dev->resources);
+}
+
+static void res_free(struct tm6000_core *dev, struct tm6000_fh *fh)
+{
+	mutex_lock(&dev->lock);
+	dev->resources = 0;
+	dprintk(dev, V4L2_DEBUG_RES_LOCK, "res: put\n");
+	mutex_unlock(&dev->lock);
+}
+
+/* ------------------------------------------------------------------
+	IOCTL vidioc handling
+   ------------------------------------------------------------------*/
+static int vidioc_querycap (struct file *file, void  *priv,
+					struct v4l2_capability *cap)
+{
+	//	struct tm6000_core *dev = ((struct tm6000_fh *)priv)->dev;
+
+	strlcpy(cap->driver, "tm6000", sizeof(cap->driver));
+	strlcpy(cap->card,"Trident TVMaster TM5600/6000", sizeof(cap->card));
+	//	strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
+	cap->version = TM6000_VERSION;
+	cap->capabilities =	V4L2_CAP_VIDEO_CAPTURE |
+				V4L2_CAP_STREAMING     |
+				V4L2_CAP_TUNER	       |
+				V4L2_CAP_READWRITE;
+	return 0;
+}
+
+static int vidioc_enum_fmt_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;
+}
+
+static int vidioc_g_fmt_cap (struct file *file, void *priv,
+					struct v4l2_format *f)
+{
+	struct tm6000_fh  *fh=priv;
+
+	f->fmt.pix.width        = fh->width;
+	f->fmt.pix.height       = fh->height;
+	f->fmt.pix.field        = fh->vb_vidq.field;
+	f->fmt.pix.pixelformat  = fh->fmt->fourcc;
+	f->fmt.pix.bytesperline =
+		(f->fmt.pix.width * fh->fmt->depth) >> 3;
+	f->fmt.pix.sizeimage =
+		f->fmt.pix.height * f->fmt.pix.bytesperline;
+
+	return (0);
+}
+
+static struct tm6000_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_cap (struct file *file, void *priv,
+			struct v4l2_format *f)
+{
+	struct tm6000_core *dev = ((struct tm6000_fh *)priv)->dev;
+	struct tm6000_fmt *fmt;
+	enum v4l2_field field;
+
+	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+	if (NULL == fmt) {
+		dprintk(dev, V4L2_DEBUG_IOCTL_ARG, "Fourcc format (0x%08x)"
+				" invalid.\n", f->fmt.pix.pixelformat);
+		return -EINVAL;
+	}
+
+	field = f->fmt.pix.field;
+
+	if (field == V4L2_FIELD_ANY) {
+//		field=V4L2_FIELD_INTERLACED;
+		field=V4L2_FIELD_SEQ_TB;
+	} else if (V4L2_FIELD_INTERLACED != field) {
+		dprintk(dev, V4L2_DEBUG_IOCTL_ARG, "Field type invalid.\n");
+		return -EINVAL;
+	}
+
+	if (f->fmt.pix.width  < norm_minw(core))
+		f->fmt.pix.width = norm_minw(core);
+
+	if (f->fmt.pix.width  > norm_maxw(core))
+		f->fmt.pix.width = norm_maxw(core);
+
+	if (f->fmt.pix.height < norm_minh(core))
+		f->fmt.pix.height = norm_minh(core);
+
+	if (f->fmt.pix.height > norm_maxh(core))
+		f->fmt.pix.height = norm_maxh(core);
+
+	f->fmt.pix.width &= ~0x01;
+
+	f->fmt.pix.field = field;
+
+	f->fmt.pix.bytesperline =
+		(f->fmt.pix.width * fmt->depth) >> 3;
+	f->fmt.pix.sizeimage =
+		f->fmt.pix.height * f->fmt.pix.bytesperline;
+
+	return 0;
+}
+
+/*FIXME: This seems to be generic enough to be at videodev2 */
+static int vidioc_s_fmt_cap (struct file *file, void *priv,
+					struct v4l2_format *f)
+{
+	struct tm6000_fh  *fh=priv;
+	struct tm6000_core *dev = fh->dev;
+	int ret = vidioc_try_fmt_cap(file,fh,f);
+	if (ret < 0)
+		return (ret);
+
+	fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
+	fh->width         = f->fmt.pix.width;
+	fh->height        = f->fmt.pix.height;
+	fh->vb_vidq.field = f->fmt.pix.field;
+	fh->type          = f->type;
+
+	dev->fourcc       = f->fmt.pix.pixelformat;
+
+	tm6000_set_fourcc_format(dev);
+
+	return (0);
+}
+
+static int vidioc_reqbufs (struct file *file, void *priv,
+			   struct v4l2_requestbuffers *p)
+{
+	struct tm6000_fh  *fh=priv;
+
+	return (videobuf_reqbufs(&fh->vb_vidq, p));
+}
+
+static int vidioc_querybuf (struct file *file, void *priv,
+			    struct v4l2_buffer *p)
+{
+	struct tm6000_fh  *fh=priv;
+
+	return (videobuf_querybuf(&fh->vb_vidq, p));
+}
+
+static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
+{
+	struct tm6000_fh  *fh=priv;
+
+	return (videobuf_qbuf(&fh->vb_vidq, p));
+}
+
+static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
+{
+	struct tm6000_fh  *fh=priv;
+
+	return (videobuf_dqbuf(&fh->vb_vidq, p,
+				file->f_flags & O_NONBLOCK));
+}
+
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
+{
+	struct tm6000_fh  *fh=priv;
+
+	return videobuf_cgmbuf (&fh->vb_vidq, mbuf, 8);
+}
+#endif
+
+static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+	struct tm6000_fh  *fh=priv;
+	struct tm6000_core *dev    = fh->dev;
+
+	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (i != fh->type)
+		return -EINVAL;
+
+	if (!res_get(dev,fh))
+		return -EBUSY;
+	return (videobuf_streamon(&fh->vb_vidq));
+}
+
+static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+	struct tm6000_fh  *fh=priv;
+	struct tm6000_core *dev    = fh->dev;
+
+	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (i != fh->type)
+		return -EINVAL;
+
+	videobuf_streamoff(&fh->vb_vidq);
+	res_free(dev,fh);
+
+	return (0);
+}
+
+static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *norm)
+{
+	int rc=0;
+	struct tm6000_fh   *fh=priv;
+	struct tm6000_core *dev = fh->dev;
+
+	rc=tm6000_set_standard (dev, norm);
+	if (rc<0)
+		return rc;
+
+	tm6000_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
+
+	return 0;
+}
+
+static int vidioc_enum_input (struct file *file, void *priv,
+				struct v4l2_input *inp)
+{
+	switch (inp->index) {
+	case TM6000_INPUT_TV:
+		inp->type = V4L2_INPUT_TYPE_TUNER;
+		strcpy(inp->name,"Television");
+		break;
+	case TM6000_INPUT_COMPOSITE:
+		inp->type = V4L2_INPUT_TYPE_CAMERA;
+		strcpy(inp->name,"Composite");
+		break;
+	case TM6000_INPUT_SVIDEO:
+		inp->type = V4L2_INPUT_TYPE_CAMERA;
+		strcpy(inp->name,"S-Video");
+		break;
+	default:
+		return -EINVAL;
+	}
+	inp->std = TM6000_STD;
+
+	return 0;
+}
+
+static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
+{
+	struct tm6000_fh   *fh=priv;
+	struct tm6000_core *dev = fh->dev;
+
+	*i=dev->input;
+
+	return 0;
+}
+static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
+{
+	struct tm6000_fh   *fh=priv;
+	struct tm6000_core *dev = fh->dev;
+	int rc=0;
+	char buf[1];
+
+	switch (i) {
+	case TM6000_INPUT_TV:
+		dev->input=i;
+		*buf=0;
+		break;
+	case TM6000_INPUT_COMPOSITE:
+	case TM6000_INPUT_SVIDEO:
+		dev->input=i;
+		*buf=1;
+		break;
+	default:
+		return -EINVAL;
+	}
+	rc=tm6000_read_write_usb (dev, USB_DIR_OUT | USB_TYPE_VENDOR,
+			       REQ_03_SET_GET_MCU_PIN, 0x03, 1, buf, 1);
+
+	if (!rc) {
+		dev->input=i;
+		rc=vidioc_s_std (file, priv, &dev->vfd.current_norm);
+	}
+
+	return (rc);
+}
+
+	/* --- controls ---------------------------------------------- */
+static int vidioc_queryctrl (struct file *file, void *priv,
+				struct v4l2_queryctrl *qc)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tm6000_qctrl); i++)
+		if (qc->id && qc->id == tm6000_qctrl[i].id) {
+			memcpy(qc, &(tm6000_qctrl[i]),
+				sizeof(*qc));
+			return (0);
+		}
+
+	return -EINVAL;
+}
+
+static int vidioc_g_ctrl (struct file *file, void *priv,
+				struct v4l2_control *ctrl)
+{
+	struct tm6000_fh  *fh=priv;
+	struct tm6000_core *dev    = fh->dev;
+	int  val;
+
+	/* FIXME: Probably, those won't work! Maybe we need shadow regs */
+	switch (ctrl->id) {
+	case V4L2_CID_CONTRAST:
+		val=tm6000_get_reg (dev, REQ_07_SET_GET_AVREG, 0x08, 0);
+		break;
+	case V4L2_CID_BRIGHTNESS:
+		val=tm6000_get_reg (dev, REQ_07_SET_GET_AVREG, 0x09, 0);
+		return 0;
+	case V4L2_CID_SATURATION:
+		val=tm6000_get_reg (dev, REQ_07_SET_GET_AVREG, 0x0a, 0);
+		return 0;
+	case V4L2_CID_HUE:
+		val=tm6000_get_reg (dev, REQ_07_SET_GET_AVREG, 0x0b, 0);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	if (val<0)
+		return val;
+
+	ctrl->value=val;
+
+	return 0;
+}
+static int vidioc_s_ctrl (struct file *file, void *priv,
+				struct v4l2_control *ctrl)
+{
+	struct tm6000_fh   *fh  =priv;
+	struct tm6000_core *dev = fh->dev;
+	u8  val=ctrl->value;
+
+	switch (ctrl->id) {
+	case V4L2_CID_CONTRAST:
+  tm6000_set_reg (dev, REQ_07_SET_GET_AVREG, 0x08, val);
+		return 0;
+	case V4L2_CID_BRIGHTNESS:
+  tm6000_set_reg (dev, REQ_07_SET_GET_AVREG, 0x09, val);
+		return 0;
+	case V4L2_CID_SATURATION:
+  tm6000_set_reg (dev, REQ_07_SET_GET_AVREG, 0x0a, val);
+		return 0;
+	case V4L2_CID_HUE:
+  tm6000_set_reg (dev, REQ_07_SET_GET_AVREG, 0x0b, val);
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int vidioc_g_tuner (struct file *file, void *priv,
+				struct v4l2_tuner *t)
+{
+	struct tm6000_fh   *fh  =priv;
+	struct tm6000_core *dev = fh->dev;
+
+	if (unlikely(UNSET == dev->tuner_type))
+		return -EINVAL;
+	if (0 != t->index)
+		return -EINVAL;
+
+	strcpy(t->name, "Television");
+	t->type       = V4L2_TUNER_ANALOG_TV;
+	t->capability = V4L2_TUNER_CAP_NORM;
+	t->rangehigh  = 0xffffffffUL;
+	t->rxsubchans = V4L2_TUNER_SUB_MONO;
+
+	return 0;
+}
+
+static int vidioc_s_tuner (struct file *file, void *priv,
+				struct v4l2_tuner *t)
+{
+	struct tm6000_fh   *fh  =priv;
+	struct tm6000_core *dev = fh->dev;
+
+	if (UNSET == dev->tuner_type)
+		return -EINVAL;
+	if (0 != t->index)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int vidioc_g_frequency (struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct tm6000_fh   *fh  =priv;
+	struct tm6000_core *dev = fh->dev;
+
+	if (unlikely(UNSET == dev->tuner_type))
+		return -EINVAL;
+
+	f->type = V4L2_TUNER_ANALOG_TV;
+	f->frequency = dev->freq;
+
+	tm6000_i2c_call_clients(dev,VIDIOC_G_FREQUENCY,f);
+
+	return 0;
+}
+
+static int vidioc_s_frequency (struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct tm6000_fh   *fh  =priv;
+	struct tm6000_core *dev = fh->dev;
+
+	if (unlikely(f->type != V4L2_TUNER_ANALOG_TV))
+		return -EINVAL;
+
+	if (unlikely(UNSET == dev->tuner_type))
+		return -EINVAL;
+	if (unlikely(f->tuner != 0))
+		return -EINVAL;
+
+//	mutex_lock(&dev->lock);
+	dev->freq = f->frequency;
+	tm6000_i2c_call_clients(dev,VIDIOC_S_FREQUENCY,f);
+//	mutex_unlock(&dev->lock);
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------
+	File operations for the device
+   ------------------------------------------------------------------*/
+
+static int tm6000_open(struct inode *inode, struct file *file)
+{
+	int minor = iminor(inode);
+	struct tm6000_core *h,*dev = NULL;
+	struct tm6000_fh *fh;
+	struct list_head *list;
+	enum v4l2_buf_type type = 0;
+	int i,rc;
+
+	dprintk(dev, V4L2_DEBUG_OPEN, "tm6000: open called "
+						"(minor=%d)\n",minor);
+
+	list_for_each(list,&tm6000_corelist) {
+		h = list_entry(list, struct tm6000_core, tm6000_corelist);
+		if (h->vfd.minor == minor) {
+			dev  = h;
+			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		}
+	}
+	if (NULL == dev)
+		return -ENODEV;
+
+
+	/* If more than one user, mutex should be added */
+	dev->users++;
+
+	dprintk(dev, V4L2_DEBUG_OPEN, "open minor=%d type=%s users=%d\n",
+				minor,v4l2_type_names[type],dev->users);
+
+	/* allocate + initialize per filehandle data */
+	fh = kzalloc(sizeof(*fh),GFP_KERNEL);
+	if (NULL == fh) {
+		dev->users--;
+		return -ENOMEM;
+	}
+
+	file->private_data = fh;
+	fh->dev      = dev;
+
+	fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	dev->fourcc  = format[0].fourcc;
+
+	fh->fmt      = format_by_fourcc(dev->fourcc);
+	fh->width    = norm_maxw();
+	fh->height   = norm_maxh();
+
+	dprintk(dev, V4L2_DEBUG_OPEN, "Open: fh=0x%08lx, dev=0x%08lx, "
+						"dev->vidq=0x%08lx\n",
+		(unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
+	dprintk(dev, V4L2_DEBUG_OPEN, "Open: list_empty "
+				"queued=%d\n",list_empty(&dev->vidq.queued));
+	dprintk(dev, V4L2_DEBUG_OPEN, "Open: list_empty "
+				"active=%d\n",list_empty(&dev->vidq.active));
+
+	/* initialize hardware on analog mode */
+	if (dev->mode!=TM6000_MODE_ANALOG) {
+		rc=tm6000_init_analog_mode (dev);
+		if (rc<0)
+			return rc;
+
+		/* Put all controls at a sane state */
+		for (i = 0; i < ARRAY_SIZE(tm6000_qctrl); i++)
+			qctl_regs[i] =tm6000_qctrl[i].default_value;
+
+		dev->mode=TM6000_MODE_ANALOG;
+	}
+
+	videobuf_queue_vmalloc_init(&fh->vb_vidq, &tm6000_video_qops,
+			NULL, &dev->slock,
+			fh->type,
+			V4L2_FIELD_INTERLACED,
+			sizeof(struct tm6000_buffer),fh);
+
+	return 0;
+}
+
+static ssize_t
+tm6000_read(struct file *file, char __user *data, size_t count, loff_t *pos)
+{
+	struct tm6000_fh        *fh = file->private_data;
+
+	if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		if (res_locked(fh->dev))
+			return -EBUSY;
+
+		return videobuf_read_stream(&fh->vb_vidq, data, count, pos, 0,
+					file->f_flags & O_NONBLOCK);
+	}
+	return 0;
+}
+
+static unsigned int
+tm6000_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct tm6000_fh        *fh = file->private_data;
+	struct tm6000_buffer    *buf;
+
+	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
+		return POLLERR;
+
+	if (res_get(fh->dev,fh)) {
+		/* streaming capture */
+		if (list_empty(&fh->vb_vidq.stream))
+			return POLLERR;
+		buf = list_entry(fh->vb_vidq.stream.next,struct tm6000_buffer,vb.stream);
+	} else {
+		/* read() capture */
+		buf = (struct tm6000_buffer*)fh->vb_vidq.read_buf;
+		if (NULL == buf)
+			return POLLERR;
+	}
+	poll_wait(file, &buf->vb.done, wait);
+	if (buf->vb.state == STATE_DONE ||
+	    buf->vb.state == STATE_ERROR)
+		return POLLIN|POLLRDNORM;
+	return 0;
+}
+
+static int tm6000_release(struct inode *inode, struct file *file)
+{
+	struct tm6000_fh         *fh = file->private_data;
+	struct tm6000_core      *dev = fh->dev;
+	struct tm6000_dmaqueue *vidq = &dev->vidq;
+	int minor = iminor(inode);
+
+	tm6000_stop_thread(vidq);
+	videobuf_mmap_free(&fh->vb_vidq);
+
+	kfree (fh);
+
+	dprintk(dev, V4L2_DEBUG_OPEN, "tm6000: close called (minor=%d, users=%d)\n",minor,dev->users);
+
+	return 0;
+}
+
+static int tm6000_mmap(struct file *file, struct vm_area_struct * vma)
+{
+	struct tm6000_fh        *fh = file->private_data;
+	int ret;
+
+	ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
+
+	return ret;
+}
+
+static struct file_operations tm6000_fops = {
+	.owner		= THIS_MODULE,
+	.open           = tm6000_open,
+	.release        = tm6000_release,
+	.ioctl          = video_ioctl2, /* V4L2 ioctl handler */
+	.read           = tm6000_read,
+	.poll		= tm6000_poll,
+	.mmap		= tm6000_mmap,
+	.llseek         = no_llseek,
+};
+
+static struct video_device tm6000_template = {
+	.name		= "tm6000",
+	.type		= VID_TYPE_CAPTURE,
+	.fops           = &tm6000_fops,
+	.minor		= -1,
+	.release	= video_device_release,
+
+	.vidioc_querycap      = vidioc_querycap,
+	.vidioc_enum_fmt_cap  = vidioc_enum_fmt_cap,
+	.vidioc_g_fmt_cap     = vidioc_g_fmt_cap,
+	.vidioc_try_fmt_cap   = vidioc_try_fmt_cap,
+	.vidioc_s_fmt_cap     = vidioc_s_fmt_cap,
+	.vidioc_s_std         = vidioc_s_std,
+	.vidioc_enum_input    = vidioc_enum_input,
+	.vidioc_g_input       = vidioc_g_input,
+	.vidioc_s_input       = vidioc_s_input,
+	.vidioc_queryctrl     = vidioc_queryctrl,
+	.vidioc_g_ctrl        = vidioc_g_ctrl,
+	.vidioc_s_ctrl        = vidioc_s_ctrl,
+	.vidioc_g_tuner       = vidioc_g_tuner,
+	.vidioc_s_tuner       = vidioc_s_tuner,
+	.vidioc_g_frequency   = vidioc_g_frequency,
+	.vidioc_s_frequency   = vidioc_s_frequency,
+	.vidioc_streamon      = vidioc_streamon,
+	.vidioc_streamoff     = vidioc_streamoff,
+	.vidioc_reqbufs       = vidioc_reqbufs,
+	.vidioc_querybuf      = vidioc_querybuf,
+	.vidioc_qbuf          = vidioc_qbuf,
+	.vidioc_dqbuf         = vidioc_dqbuf,
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+	.vidiocgmbuf          = vidiocgmbuf,
+#endif
+	.tvnorms              = TM6000_STD,
+	.current_norm         = V4L2_STD_NTSC_M,
+};
+/* -----------------------------------------------------------------
+	Initialization and module stuff
+   ------------------------------------------------------------------*/
+
+int tm6000_v4l2_register(struct tm6000_core *dev)
+{
+	int ret;
+
+	list_add_tail(&dev->tm6000_corelist,&tm6000_corelist);
+
+	/* init video dma queues */
+	INIT_LIST_HEAD(&dev->vidq.active);
+	INIT_LIST_HEAD(&dev->vidq.queued);
+
+	dev->vidq.timeout.function = tm6000_vid_timeout;
+	dev->vidq.timeout.data     = (unsigned long)dev;
+	init_timer(&dev->vidq.timeout);
+
+	memcpy (&dev->vfd, &tm6000_template, sizeof(dev->vfd));
+	dev->vfd.debug=tm6000_debug;
+
+	ret = video_register_device(&dev->vfd, VFL_TYPE_GRABBER, video_nr);
+	printk(KERN_INFO "Trident TVMaster TM5600/TM6000 USB2 board (Load status: %d)\n", ret);
+	return ret;
+}
+
+int tm6000_v4l2_unregister(struct tm6000_core *dev)
+{
+	struct tm6000_core *h;
+	struct list_head *list;
+
+	while (!list_empty(&tm6000_corelist)) {
+		list = tm6000_corelist.next;
+		h = list_entry(list, struct tm6000_core, tm6000_corelist);
+		if (h == dev) {
+			video_unregister_device(&dev->vfd);
+			list_del(list);
+			kfree (h);
+		}
+	}
+
+	return 0;
+}
+
+int tm6000_v4l2_exit(void)
+{
+	return 0;
+}
+
+module_param(video_nr, int, 0);
+MODULE_PARM_DESC(video_nr,"Allow changing video device number");
+
+module_param_named (debug, tm6000_debug, int, 0444);
+MODULE_PARM_DESC(debug,"activates debug info");
+
+module_param(vid_limit,int,0644);
+MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
+