Initial import

1 files changed, 733 insertions, 0 deletions

diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2.c b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
new file mode 100644
index 000000000..63ae8a61f
--- /dev/null
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
@@ -0,0 +1,733 @@
+/*
+ * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
+ *
+ * Original author:
+ * Ben Collins <bcollins@ubuntu.com>
+ *
+ * Additional work by:
+ * John Brooks <john.brooks@bluecherry.net>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "solo6x10.h"
+#include "solo6x10-tw28.h"
+
+/* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
+#define SOLO_HW_BPL		2048
+#define solo_vlines(__solo)	(__solo->video_vsize * 2)
+#define solo_image_size(__solo) (solo_bytesperline(__solo) * \
+				 solo_vlines(__solo))
+#define solo_bytesperline(__solo) (__solo->video_hsize * 2)
+
+#define MIN_VID_BUFFERS		2
+
+static inline void erase_on(struct solo_dev *solo_dev)
+{
+	solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
+	solo_dev->erasing = 1;
+	solo_dev->frame_blank = 0;
+}
+
+static inline int erase_off(struct solo_dev *solo_dev)
+{
+	if (!solo_dev->erasing)
+		return 0;
+
+	/* First time around, assert erase off */
+	if (!solo_dev->frame_blank)
+		solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
+	/* Keep the erasing flag on for 8 frames minimum */
+	if (solo_dev->frame_blank++ >= 8)
+		solo_dev->erasing = 0;
+
+	return 1;
+}
+
+void solo_video_in_isr(struct solo_dev *solo_dev)
+{
+	wake_up_interruptible_all(&solo_dev->disp_thread_wait);
+}
+
+static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
+			   int sx, int sy, int ex, int ey, int scale)
+{
+	if (ch >= solo_dev->nr_chans)
+		return;
+
+	/* Here, we just keep window/channel the same */
+	solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
+		       SOLO_VI_WIN_CHANNEL(ch) |
+		       SOLO_VI_WIN_SX(sx) |
+		       SOLO_VI_WIN_EX(ex) |
+		       SOLO_VI_WIN_SCALE(scale));
+
+	solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
+		       SOLO_VI_WIN_SY(sy) |
+		       SOLO_VI_WIN_EY(ey));
+}
+
+static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
+{
+	u8 ch = idx * 4;
+
+	if (ch >= solo_dev->nr_chans)
+		return -EINVAL;
+
+	if (!on) {
+		u8 i;
+
+		for (i = ch; i < ch + 4; i++)
+			solo_win_setup(solo_dev, i, solo_dev->video_hsize,
+				       solo_vlines(solo_dev),
+				       solo_dev->video_hsize,
+				       solo_vlines(solo_dev), 0);
+		return 0;
+	}
+
+	/* Row 1 */
+	solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
+		       solo_vlines(solo_dev) / 2, 3);
+	solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
+		       solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
+	/* Row 2 */
+	solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
+		       solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
+	solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
+		       solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
+		       solo_vlines(solo_dev), 3);
+
+	return 0;
+}
+
+static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
+{
+	int sy, ysize, hsize, i;
+
+	if (!on) {
+		for (i = 0; i < 16; i++)
+			solo_win_setup(solo_dev, i, solo_dev->video_hsize,
+				       solo_vlines(solo_dev),
+				       solo_dev->video_hsize,
+				       solo_vlines(solo_dev), 0);
+		return 0;
+	}
+
+	ysize = solo_vlines(solo_dev) / 4;
+	hsize = solo_dev->video_hsize / 4;
+
+	for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
+		solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
+			       sy + ysize, 5);
+		solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
+			       hsize * 2, sy + ysize, 5);
+		solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
+			       hsize * 3, sy + ysize, 5);
+		solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
+			       solo_dev->video_hsize, sy + ysize, 5);
+	}
+
+	return 0;
+}
+
+static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
+{
+	u8 ext_ch;
+
+	if (ch < solo_dev->nr_chans) {
+		solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
+			       on ? 0 : solo_vlines(solo_dev),
+			       solo_dev->video_hsize, solo_vlines(solo_dev),
+			       on ? 1 : 0);
+		return 0;
+	}
+
+	if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
+		return -EINVAL;
+
+	ext_ch = ch - solo_dev->nr_chans;
+
+	/* 4up's first */
+	if (ext_ch < 4)
+		return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
+
+	/* Remaining case is 16up for 16-port */
+	return solo_v4l2_ch_ext_16up(solo_dev, on);
+}
+
+static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
+{
+	if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
+		return -EINVAL;
+
+	erase_on(solo_dev);
+
+	solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
+	solo_v4l2_ch(solo_dev, ch, 1);
+
+	solo_dev->cur_disp_ch = ch;
+
+	return 0;
+}
+
+static void solo_fillbuf(struct solo_dev *solo_dev,
+			 struct vb2_buffer *vb)
+{
+	dma_addr_t vbuf;
+	unsigned int fdma_addr;
+	int error = -1;
+	int i;
+
+	vbuf = vb2_dma_contig_plane_dma_addr(vb, 0);
+	if (!vbuf)
+		goto finish_buf;
+
+	if (erase_off(solo_dev)) {
+		void *p = vb2_plane_vaddr(vb, 0);
+		int image_size = solo_image_size(solo_dev);
+
+		for (i = 0; i < image_size; i += 2) {
+			((u8 *)p)[i] = 0x80;
+			((u8 *)p)[i + 1] = 0x00;
+		}
+		error = 0;
+	} else {
+		fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
+				(SOLO_HW_BPL * solo_vlines(solo_dev)));
+
+		error = solo_p2m_dma_t(solo_dev, 0, vbuf, fdma_addr,
+				       solo_bytesperline(solo_dev),
+				       solo_vlines(solo_dev), SOLO_HW_BPL);
+	}
+
+finish_buf:
+	if (!error) {
+		vb2_set_plane_payload(vb, 0,
+			solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
+		vb->v4l2_buf.sequence = solo_dev->sequence++;
+		v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
+	}
+
+	vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
+}
+
+static void solo_thread_try(struct solo_dev *solo_dev)
+{
+	struct solo_vb2_buf *vb;
+
+	/* Only "break" from this loop if slock is held, otherwise
+	 * just return. */
+	for (;;) {
+		unsigned int cur_write;
+
+		cur_write = SOLO_VI_STATUS0_PAGE(
+			solo_reg_read(solo_dev, SOLO_VI_STATUS0));
+		if (cur_write == solo_dev->old_write)
+			return;
+
+		spin_lock(&solo_dev->slock);
+
+		if (list_empty(&solo_dev->vidq_active))
+			break;
+
+		vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
+				      list);
+
+		solo_dev->old_write = cur_write;
+		list_del(&vb->list);
+
+		spin_unlock(&solo_dev->slock);
+
+		solo_fillbuf(solo_dev, &vb->vb);
+	}
+
+	assert_spin_locked(&solo_dev->slock);
+	spin_unlock(&solo_dev->slock);
+}
+
+static int solo_thread(void *data)
+{
+	struct solo_dev *solo_dev = data;
+	DECLARE_WAITQUEUE(wait, current);
+
+	set_freezable();
+	add_wait_queue(&solo_dev->disp_thread_wait, &wait);
+
+	for (;;) {
+		long timeout = schedule_timeout_interruptible(HZ);
+
+		if (timeout == -ERESTARTSYS || kthread_should_stop())
+			break;
+		solo_thread_try(solo_dev);
+		try_to_freeze();
+	}
+
+	remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
+
+	return 0;
+}
+
+static int solo_start_thread(struct solo_dev *solo_dev)
+{
+	int ret = 0;
+
+	solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
+
+	if (IS_ERR(solo_dev->kthread)) {
+		ret = PTR_ERR(solo_dev->kthread);
+		solo_dev->kthread = NULL;
+		return ret;
+	}
+	solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
+
+	return ret;
+}
+
+static void solo_stop_thread(struct solo_dev *solo_dev)
+{
+	if (!solo_dev->kthread)
+		return;
+
+	solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
+	kthread_stop(solo_dev->kthread);
+	solo_dev->kthread = NULL;
+}
+
+static int solo_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+			   unsigned int *num_buffers, unsigned int *num_planes,
+			   unsigned int sizes[], void *alloc_ctxs[])
+{
+	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
+
+	sizes[0] = solo_image_size(solo_dev);
+	alloc_ctxs[0] = solo_dev->alloc_ctx;
+	*num_planes = 1;
+
+	if (*num_buffers < MIN_VID_BUFFERS)
+		*num_buffers = MIN_VID_BUFFERS;
+
+	return 0;
+}
+
+static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
+
+	solo_dev->sequence = 0;
+	return solo_start_thread(solo_dev);
+}
+
+static void solo_stop_streaming(struct vb2_queue *q)
+{
+	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
+
+	solo_stop_thread(solo_dev);
+	INIT_LIST_HEAD(&solo_dev->vidq_active);
+}
+
+static void solo_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_queue *vq = vb->vb2_queue;
+	struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
+	struct solo_vb2_buf *solo_vb =
+		container_of(vb, struct solo_vb2_buf, vb);
+
+	spin_lock(&solo_dev->slock);
+	list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
+	spin_unlock(&solo_dev->slock);
+	wake_up_interruptible(&solo_dev->disp_thread_wait);
+}
+
+static const struct vb2_ops solo_video_qops = {
+	.queue_setup	= solo_queue_setup,
+	.buf_queue	= solo_buf_queue,
+	.start_streaming = solo_start_streaming,
+	.stop_streaming = solo_stop_streaming,
+	.wait_prepare	= vb2_ops_wait_prepare,
+	.wait_finish	= vb2_ops_wait_finish,
+};
+
+static int solo_querycap(struct file *file, void  *priv,
+			 struct v4l2_capability *cap)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	strcpy(cap->driver, SOLO6X10_NAME);
+	strcpy(cap->card, "Softlogic 6x10");
+	snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
+		 pci_name(solo_dev->pdev));
+	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+			V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
+	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int solo_enum_ext_input(struct solo_dev *solo_dev,
+			       struct v4l2_input *input)
+{
+	static const char * const dispnames_1[] = { "4UP" };
+	static const char * const dispnames_2[] = { "4UP-1", "4UP-2" };
+	static const char * const dispnames_5[] = {
+		"4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
+	};
+	const char * const *dispnames;
+
+	if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
+		return -EINVAL;
+
+	if (solo_dev->nr_ext == 5)
+		dispnames = dispnames_5;
+	else if (solo_dev->nr_ext == 2)
+		dispnames = dispnames_2;
+	else
+		dispnames = dispnames_1;
+
+	snprintf(input->name, sizeof(input->name), "Multi %s",
+		 dispnames[input->index - solo_dev->nr_chans]);
+
+	return 0;
+}
+
+static int solo_enum_input(struct file *file, void *priv,
+			   struct v4l2_input *input)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	if (input->index >= solo_dev->nr_chans) {
+		int ret = solo_enum_ext_input(solo_dev, input);
+
+		if (ret < 0)
+			return ret;
+	} else {
+		snprintf(input->name, sizeof(input->name), "Camera %d",
+			 input->index + 1);
+
+		/* We can only check this for normal inputs */
+		if (!tw28_get_video_status(solo_dev, input->index))
+			input->status = V4L2_IN_ST_NO_SIGNAL;
+	}
+
+	input->type = V4L2_INPUT_TYPE_CAMERA;
+	input->std = solo_dev->vfd->tvnorms;
+	return 0;
+}
+
+static int solo_set_input(struct file *file, void *priv, unsigned int index)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+	int ret = solo_v4l2_set_ch(solo_dev, index);
+
+	if (!ret) {
+		while (erase_off(solo_dev))
+			/* Do nothing */;
+	}
+
+	return ret;
+}
+
+static int solo_get_input(struct file *file, void *priv, unsigned int *index)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	*index = solo_dev->cur_disp_ch;
+
+	return 0;
+}
+
+static int solo_enum_fmt_cap(struct file *file, void *priv,
+			     struct v4l2_fmtdesc *f)
+{
+	if (f->index)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_PIX_FMT_UYVY;
+	strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));
+
+	return 0;
+}
+
+static int solo_try_fmt_cap(struct file *file, void *priv,
+			    struct v4l2_format *f)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+	int image_size = solo_image_size(solo_dev);
+
+	if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
+		return -EINVAL;
+
+	pix->width = solo_dev->video_hsize;
+	pix->height = solo_vlines(solo_dev);
+	pix->sizeimage = image_size;
+	pix->field = V4L2_FIELD_INTERLACED;
+	pix->pixelformat = V4L2_PIX_FMT_UYVY;
+	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	pix->priv = 0;
+	return 0;
+}
+
+static int solo_set_fmt_cap(struct file *file, void *priv,
+			    struct v4l2_format *f)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	if (vb2_is_busy(&solo_dev->vidq))
+		return -EBUSY;
+
+	/* For right now, if it doesn't match our running config,
+	 * then fail */
+	return solo_try_fmt_cap(file, priv, f);
+}
+
+static int solo_get_fmt_cap(struct file *file, void *priv,
+			    struct v4l2_format *f)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+
+	pix->width = solo_dev->video_hsize;
+	pix->height = solo_vlines(solo_dev);
+	pix->pixelformat = V4L2_PIX_FMT_UYVY;
+	pix->field = V4L2_FIELD_INTERLACED;
+	pix->sizeimage = solo_image_size(solo_dev);
+	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	pix->bytesperline = solo_bytesperline(solo_dev);
+	pix->priv = 0;
+
+	return 0;
+}
+
+static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
+		*i = V4L2_STD_NTSC_M;
+	else
+		*i = V4L2_STD_PAL;
+	return 0;
+}
+
+int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
+{
+	int i;
+
+	/* Make sure all video nodes are idle */
+	if (vb2_is_busy(&solo_dev->vidq))
+		return -EBUSY;
+	for (i = 0; i < solo_dev->nr_chans; i++)
+		if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
+			return -EBUSY;
+	solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
+					 SOLO_VO_FMT_TYPE_NTSC;
+	/* Reconfigure for the new standard */
+	solo_disp_init(solo_dev);
+	solo_enc_init(solo_dev);
+	solo_tw28_init(solo_dev);
+	for (i = 0; i < solo_dev->nr_chans; i++)
+		solo_update_mode(solo_dev->v4l2_enc[i]);
+	return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
+}
+
+static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
+{
+	struct solo_dev *solo_dev = video_drvdata(file);
+
+	return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
+}
+
+static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct solo_dev *solo_dev =
+		container_of(ctrl->handler, struct solo_dev, disp_hdl);
+
+	switch (ctrl->id) {
+	case V4L2_CID_MOTION_TRACE:
+		if (ctrl->val) {
+			solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
+					SOLO_VI_MOTION_Y_ADD |
+					SOLO_VI_MOTION_Y_VALUE(0x20) |
+					SOLO_VI_MOTION_CB_VALUE(0x10) |
+					SOLO_VI_MOTION_CR_VALUE(0x10));
+			solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
+					SOLO_VI_MOTION_CR_ADD |
+					SOLO_VI_MOTION_Y_VALUE(0x10) |
+					SOLO_VI_MOTION_CB_VALUE(0x80) |
+					SOLO_VI_MOTION_CR_VALUE(0x10));
+		} else {
+			solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
+			solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
+		}
+		return 0;
+	default:
+		break;
+	}
+	return -EINVAL;
+}
+
+static const struct v4l2_file_operations solo_v4l2_fops = {
+	.owner			= THIS_MODULE,
+	.open			= v4l2_fh_open,
+	.release		= vb2_fop_release,
+	.read			= vb2_fop_read,
+	.poll			= vb2_fop_poll,
+	.mmap			= vb2_fop_mmap,
+	.unlocked_ioctl		= video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
+	.vidioc_querycap		= solo_querycap,
+	.vidioc_s_std			= solo_s_std,
+	.vidioc_g_std			= solo_g_std,
+	/* Input callbacks */
+	.vidioc_enum_input		= solo_enum_input,
+	.vidioc_s_input			= solo_set_input,
+	.vidioc_g_input			= solo_get_input,
+	/* Video capture format callbacks */
+	.vidioc_enum_fmt_vid_cap	= solo_enum_fmt_cap,
+	.vidioc_try_fmt_vid_cap		= solo_try_fmt_cap,
+	.vidioc_s_fmt_vid_cap		= solo_set_fmt_cap,
+	.vidioc_g_fmt_vid_cap		= solo_get_fmt_cap,
+	/* Streaming I/O */
+	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
+	.vidioc_querybuf		= vb2_ioctl_querybuf,
+	.vidioc_qbuf			= vb2_ioctl_qbuf,
+	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
+	.vidioc_streamon		= vb2_ioctl_streamon,
+	.vidioc_streamoff		= vb2_ioctl_streamoff,
+	/* Logging and events */
+	.vidioc_log_status		= v4l2_ctrl_log_status,
+	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
+};
+
+static struct video_device solo_v4l2_template = {
+	.name			= SOLO6X10_NAME,
+	.fops			= &solo_v4l2_fops,
+	.ioctl_ops		= &solo_v4l2_ioctl_ops,
+	.minor			= -1,
+	.release		= video_device_release,
+	.tvnorms		= V4L2_STD_NTSC_M | V4L2_STD_PAL,
+};
+
+static const struct v4l2_ctrl_ops solo_ctrl_ops = {
+	.s_ctrl = solo_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
+	.ops = &solo_ctrl_ops,
+	.id = V4L2_CID_MOTION_TRACE,
+	.name = "Motion Detection Trace",
+	.type = V4L2_CTRL_TYPE_BOOLEAN,
+	.max = 1,
+	.step = 1,
+};
+
+int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
+{
+	int ret;
+	int i;
+
+	init_waitqueue_head(&solo_dev->disp_thread_wait);
+	spin_lock_init(&solo_dev->slock);
+	mutex_init(&solo_dev->lock);
+	INIT_LIST_HEAD(&solo_dev->vidq_active);
+
+	solo_dev->vfd = video_device_alloc();
+	if (!solo_dev->vfd)
+		return -ENOMEM;
+
+	*solo_dev->vfd = solo_v4l2_template;
+	solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
+	solo_dev->vfd->queue = &solo_dev->vidq;
+	solo_dev->vfd->lock = &solo_dev->lock;
+	v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
+	v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
+	if (solo_dev->disp_hdl.error) {
+		ret = solo_dev->disp_hdl.error;
+		goto fail;
+	}
+	solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
+
+	video_set_drvdata(solo_dev->vfd, solo_dev);
+
+	solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+	solo_dev->vidq.ops = &solo_video_qops;
+	solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
+	solo_dev->vidq.drv_priv = solo_dev;
+	solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	solo_dev->vidq.gfp_flags = __GFP_DMA32;
+	solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
+	solo_dev->vidq.lock = &solo_dev->lock;
+	ret = vb2_queue_init(&solo_dev->vidq);
+	if (ret < 0)
+		goto fail;
+
+	solo_dev->alloc_ctx = vb2_dma_contig_init_ctx(&solo_dev->pdev->dev);
+	if (IS_ERR(solo_dev->alloc_ctx)) {
+		dev_err(&solo_dev->pdev->dev, "Can't allocate buffer context");
+		return PTR_ERR(solo_dev->alloc_ctx);
+	}
+
+	/* Cycle all the channels and clear */
+	for (i = 0; i < solo_dev->nr_chans; i++) {
+		solo_v4l2_set_ch(solo_dev, i);
+		while (erase_off(solo_dev))
+			/* Do nothing */;
+	}
+
+	/* Set the default display channel */
+	solo_v4l2_set_ch(solo_dev, 0);
+	while (erase_off(solo_dev))
+		/* Do nothing */;
+
+	ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
+	if (ret < 0)
+		goto fail;
+
+	snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
+		 SOLO6X10_NAME, solo_dev->vfd->num);
+
+	dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
+		 "%d inputs (%d extended)\n", solo_dev->vfd->num,
+		 solo_dev->nr_chans, solo_dev->nr_ext);
+
+	return 0;
+
+fail:
+	video_device_release(solo_dev->vfd);
+	vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
+	v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
+	solo_dev->vfd = NULL;
+	return ret;
+}
+
+void solo_v4l2_exit(struct solo_dev *solo_dev)
+{
+	if (solo_dev->vfd == NULL)
+		return;
+
+	video_unregister_device(solo_dev->vfd);
+	vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
+	v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
+	solo_dev->vfd = NULL;
+}