[RFC 06/10] media: platform: Add Sunxi Cedrus decoder driver

[Florent Revest <florent.revest@free-electrons.com>]

This patch adds a "sunxi-cedrus" v4l2 m2m decoder driver for
Allwinner's Video Processing Unit. This VPU has a low-level interface
which requires manual registers writing for frame headers. Hence, it
depends on the Request API to synchronize buffers with controls.

Most of the reverse engineering on which I based my work comes from the
"Cedrus" project: http://linux-sunxi.org/Cedrus

The driver currently only runs on the A13 and this patch doesn't
include any codec.

Signed-off-by: Florent Revest <florent.revest@free-electrons.com>
---
 drivers/media/platform/Kconfig                     |  13 +
 drivers/media/platform/Makefile                    |   1 +
 drivers/media/platform/sunxi-cedrus/Makefile       |   2 +
 drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c | 248 ++++++++++
 .../platform/sunxi-cedrus/sunxi_cedrus_common.h    |  86 ++++
 .../media/platform/sunxi-cedrus/sunxi_cedrus_dec.c | 544 +++++++++++++++++++++
 .../media/platform/sunxi-cedrus/sunxi_cedrus_dec.h |  33 ++
 .../media/platform/sunxi-cedrus/sunxi_cedrus_hw.c  | 153 ++++++
 .../media/platform/sunxi-cedrus/sunxi_cedrus_hw.h  |  32 ++
 .../platform/sunxi-cedrus/sunxi_cedrus_regs.h      | 170 +++++++
 10 files changed, 1282 insertions(+)
 create mode 100644 drivers/media/platform/sunxi-cedrus/Makefile
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
 create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index f25344b..92c92d3 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -315,6 +315,19 @@ config VIDEO_TI_VPE
 	  Support for the TI VPE(Video Processing Engine) block
 	  found on DRA7XX SoC.
 
+config VIDEO_SUNXI_CEDRUS
+	tristate "Sunxi CEDRUS VPU driver"
+	depends on VIDEO_DEV && VIDEO_V4L2
+	depends on ARCH_SUNXI
+	depends on HAS_DMA
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	---help---
+	  Support for the VPU video codec found on Sunxi SoC.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called sunxi-cedrus.
+
 config VIDEO_TI_VPE_DEBUG
 	bool "VPE debug messages"
 	depends on VIDEO_TI_VPE
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 21771c1..1419749 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_VIDEO_RENESAS_VSP1)	+= vsp1/
 obj-y	+= omap/
 
 obj-$(CONFIG_VIDEO_AM437X_VPFE)		+= am437x/
+obj-$(CONFIG_VIDEO_SUNXI_CEDRUS)	+= sunxi-cedrus/
 
 obj-$(CONFIG_VIDEO_XILINX)		+= xilinx/
 
diff --git a/drivers/media/platform/sunxi-cedrus/Makefile b/drivers/media/platform/sunxi-cedrus/Makefile
new file mode 100644
index 0000000..14c2f7a
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi_cedrus.o sunxi_cedrus_hw.o \
+				    sunxi_cedrus_dec.o
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
new file mode 100644
index 0000000..17af34c
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
@@ -0,0 +1,248 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 "sunxi_cedrus_common.h"
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+#include <linux/platform_device.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "sunxi_cedrus_dec.h"
+#include "sunxi_cedrus_hw.h"
+
+static int sunxi_cedrus_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct sunxi_cedrus_ctx *ctx =
+		container_of(ctrl->handler, struct sunxi_cedrus_ctx, hdl);
+
+	v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
+	return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops sunxi_cedrus_ctrl_ops = {
+	.s_ctrl = sunxi_cedrus_s_ctrl,
+};
+
+/*
+ * File operations
+ */
+static int sunxi_cedrus_open(struct file *file)
+{
+	struct sunxi_cedrus_dev *dev = video_drvdata(file);
+	struct sunxi_cedrus_ctx *ctx = NULL;
+	struct v4l2_ctrl_handler *hdl;
+	int rc = 0;
+
+	if (mutex_lock_interruptible(&dev->dev_mutex))
+		return -ERESTARTSYS;
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx) {
+		rc = -ENOMEM;
+		goto open_unlock;
+	}
+
+	v4l2_fh_init(&ctx->fh, video_devdata(file));
+	file->private_data = &ctx->fh;
+	ctx->dev = dev;
+	hdl = &ctx->hdl;
+	v4l2_ctrl_handler_init(hdl, 1);
+
+	if (hdl->error) {
+		rc = hdl->error;
+		v4l2_ctrl_handler_free(hdl);
+		goto open_unlock;
+	}
+	ctx->fh.ctrl_handler = hdl;
+	v4l2_ctrl_handler_setup(hdl);
+
+	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
+
+	if (IS_ERR(ctx->fh.m2m_ctx)) {
+		rc = PTR_ERR(ctx->fh.m2m_ctx);
+
+		v4l2_ctrl_handler_free(hdl);
+		kfree(ctx);
+		goto open_unlock;
+	}
+
+	v4l2_fh_add(&ctx->fh);
+
+	dev_dbg(dev->dev, "Created instance: %p, m2m_ctx: %p\n",
+		ctx, ctx->fh.m2m_ctx);
+
+open_unlock:
+	mutex_unlock(&dev->dev_mutex);
+	return rc;
+}
+
+static int sunxi_cedrus_release(struct file *file)
+{
+	struct sunxi_cedrus_dev *dev = video_drvdata(file);
+	struct sunxi_cedrus_ctx *ctx = container_of(file->private_data,
+			struct sunxi_cedrus_ctx, fh);
+
+	dev_dbg(dev->dev, "Releasing instance %p\n", ctx);
+
+	v4l2_fh_del(&ctx->fh);
+	v4l2_fh_exit(&ctx->fh);
+	v4l2_ctrl_handler_free(&ctx->hdl);
+	mutex_lock(&dev->dev_mutex);
+	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+	mutex_unlock(&dev->dev_mutex);
+	kfree(ctx);
+
+	return 0;
+}
+
+static const struct v4l2_file_operations sunxi_cedrus_fops = {
+	.owner		= THIS_MODULE,
+	.open		= sunxi_cedrus_open,
+	.release	= sunxi_cedrus_release,
+	.poll		= v4l2_m2m_fop_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.mmap		= v4l2_m2m_fop_mmap,
+};
+
+static struct video_device sunxi_cedrus_viddev = {
+	.name		= SUNXI_CEDRUS_NAME,
+	.vfl_dir	= VFL_DIR_M2M,
+	.fops		= &sunxi_cedrus_fops,
+	.ioctl_ops	= &sunxi_cedrus_ioctl_ops,
+	.minor		= -1,
+	.release	= video_device_release_empty,
+};
+
+static struct v4l2_m2m_ops m2m_ops = {
+	.device_run	= device_run,
+	.job_abort	= job_abort,
+};
+
+static int sunxi_cedrus_probe(struct platform_device *pdev)
+{
+	struct sunxi_cedrus_dev *dev;
+	struct video_device *vfd;
+	int ret;
+
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	dev->dev = &pdev->dev;
+	dev->pdev = pdev;
+
+	ret = sunxi_cedrus_hw_probe(dev);
+	if (ret) {
+		dev_err(&pdev->dev, "sunxi_cedrus_hw_probe failed\n");
+		return ret;
+	}
+
+	spin_lock_init(&dev->irqlock);
+
+	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+	if (ret)
+		return ret;
+
+	mutex_init(&dev->dev_mutex);
+
+	dev->vfd = sunxi_cedrus_viddev;
+	vfd = &dev->vfd;
+	vfd->lock = &dev->dev_mutex;
+	vfd->v4l2_dev = &dev->v4l2_dev;
+
+	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+		goto unreg_dev;
+	}
+
+	video_set_drvdata(vfd, dev);
+	snprintf(vfd->name, sizeof(vfd->name), "%s", sunxi_cedrus_viddev.name);
+	v4l2_info(&dev->v4l2_dev,
+		  "Device registered as /dev/video%d\n", vfd->num);
+
+	platform_set_drvdata(pdev, dev);
+
+	dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
+	if (IS_ERR(dev->m2m_dev)) {
+		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
+		ret = PTR_ERR(dev->m2m_dev);
+		goto err_m2m;
+	}
+
+	return 0;
+
+err_m2m:
+	v4l2_m2m_release(dev->m2m_dev);
+	video_unregister_device(&dev->vfd);
+unreg_dev:
+	v4l2_device_unregister(&dev->v4l2_dev);
+
+	return ret;
+}
+
+static int sunxi_cedrus_remove(struct platform_device *pdev)
+{
+	struct sunxi_cedrus_dev *dev = platform_get_drvdata(pdev);
+
+	v4l2_info(&dev->v4l2_dev, "Removing " SUNXI_CEDRUS_NAME);
+	v4l2_m2m_release(dev->m2m_dev);
+	video_unregister_device(&dev->vfd);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	sunxi_cedrus_hw_remove(dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_sunxi_cedrus_match[] = {
+	{ .compatible = "allwinner,sun5i-a13-video-engine" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_sunxi_cedrus_match);
+#endif
+
+static struct platform_driver sunxi_cedrus_driver = {
+	.probe		= sunxi_cedrus_probe,
+	.remove		= sunxi_cedrus_remove,
+	.driver		= {
+		.name	= SUNXI_CEDRUS_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(of_sunxi_cedrus_match),
+	},
+};
+module_platform_driver(sunxi_cedrus_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Florent Revest <florent.revest@free-electrons.com>");
+MODULE_DESCRIPTION("Sunxi Cedrus codec driver");
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
new file mode 100644
index 0000000..6b8d87a
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
@@ -0,0 +1,86 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef SUNXI_CEDRUS_COMMON_H_
+#define SUNXI_CEDRUS_COMMON_H_
+
+#include "sunxi_cedrus_regs.h"
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+#define SUNXI_CEDRUS_NAME		"sunxi-cedrus"
+
+struct sunxi_cedrus_dev {
+	struct v4l2_device	v4l2_dev;
+	struct video_device	vfd;
+	struct platform_device	*pdev;
+	struct device		*dev;
+	struct v4l2_m2m_dev	*m2m_dev;
+
+	/* Mutex for device file */
+	struct mutex		dev_mutex;
+	/* Spinlock for interrupt */
+	spinlock_t		irqlock;
+
+	struct clk *mod_clk;
+	struct clk *ahb_clk;
+	struct clk *ram_clk;
+
+	struct reset_control *rstc;
+
+	char *base;
+};
+
+struct sunxi_cedrus_fmt {
+	u32	fourcc;
+	int	depth;
+	u32	types;
+	unsigned int num_planes;
+};
+
+struct sunxi_cedrus_ctx {
+	struct v4l2_fh		fh;
+	struct sunxi_cedrus_dev	*dev;
+
+	struct sunxi_cedrus_fmt *vpu_src_fmt;
+	struct v4l2_pix_format_mplane src_fmt;
+	struct sunxi_cedrus_fmt *vpu_dst_fmt;
+	struct v4l2_pix_format_mplane dst_fmt;
+
+	struct v4l2_ctrl_handler hdl;
+
+	struct vb2_buffer *dst_bufs[VIDEO_MAX_FRAME];
+};
+
+static inline void sunxi_cedrus_write(struct sunxi_cedrus_dev *vpu,
+				      u32 val, u32 reg)
+{
+	writel(val, vpu->base + reg);
+}
+
+static inline u32 sunxi_cedrus_read(struct sunxi_cedrus_dev *vpu, u32 reg)
+{
+	return readl(vpu->base + reg);
+}
+
+#endif /* SUNXI_CEDRUS_COMMON_H_ */
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
new file mode 100644
index 0000000..71ef34b
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
@@ -0,0 +1,544 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 "sunxi_cedrus_common.h"
+
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "sunxi_cedrus_dec.h"
+#include "sunxi_cedrus_hw.h"
+
+/* Flags that indicate a format can be used for capture/output */
+#define SUNXI_CEDRUS_CAPTURE	BIT(0)
+#define SUNXI_CEDRUS_OUTPUT	BIT(1)
+
+#define SUNXI_CEDRUS_MIN_WIDTH 16U
+#define SUNXI_CEDRUS_MIN_HEIGHT 16U
+#define SUNXI_CEDRUS_MAX_WIDTH 3840U
+#define SUNXI_CEDRUS_MAX_HEIGHT 2160U
+
+static struct sunxi_cedrus_fmt formats[] = {
+	{
+		.fourcc = V4L2_PIX_FMT_SUNXI,
+		.types	= SUNXI_CEDRUS_CAPTURE,
+		.depth = 8,
+		.num_planes = 2,
+	},
+};
+
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+static struct sunxi_cedrus_fmt *find_format(struct v4l2_format *f)
+{
+	struct sunxi_cedrus_fmt *fmt;
+	unsigned int k;
+
+	for (k = 0; k < NUM_FORMATS; k++) {
+		fmt = &formats[k];
+		if (fmt->fourcc == f->fmt.pix_mp.pixelformat)
+			break;
+	}
+
+	if (k == NUM_FORMATS)
+		return NULL;
+
+	return &formats[k];
+}
+
+static inline struct sunxi_cedrus_ctx *file2ctx(struct file *file)
+{
+	return container_of(file->private_data, struct sunxi_cedrus_ctx, fh);
+}
+
+/*
+ * mem2mem callbacks
+ */
+
+void job_abort(void *priv)
+{}
+
+/*
+ * device_run() - prepares and starts processing
+ */
+void device_run(void *priv)
+{
+	struct sunxi_cedrus_ctx *ctx = priv;
+	struct vb2_v4l2_buffer *in_vb, *out_vb;
+	dma_addr_t in_buf, out_luma, out_chroma;
+
+	in_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+	out_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+
+	v4l2_ctrl_apply_request(&ctx->hdl, in_vb->request);
+
+	in_buf = vb2_dma_contig_plane_dma_addr(&in_vb->vb2_buf, 0);
+	out_luma = vb2_dma_contig_plane_dma_addr(&out_vb->vb2_buf, 0);
+	out_chroma = vb2_dma_contig_plane_dma_addr(&out_vb->vb2_buf, 1);
+	if (!in_buf || !out_luma || !out_chroma) {
+		v4l2_err(&ctx->dev->v4l2_dev,
+			 "Acquiring kernel pointers to buffers failed\n");
+		return;
+	}
+
+	/*
+	 * The VPU is only able to handle bus addresses so we have to subtract
+	 * the RAM offset to the physcal addresses
+	 */
+	in_buf     -= PHYS_OFFSET;
+	out_luma   -= PHYS_OFFSET;
+	out_chroma -= PHYS_OFFSET;
+
+	out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;
+	if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
+		out_vb->timecode = in_vb->timecode;
+	out_vb->field = in_vb->field;
+	out_vb->flags = in_vb->flags & (V4L2_BUF_FLAG_TIMECODE |
+		 V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_PFRAME |
+		 V4L2_BUF_FLAG_BFRAME   | V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
+
+	v4l2_m2m_buf_done(in_vb, VB2_BUF_STATE_ERROR);
+	v4l2_m2m_buf_done(out_vb, VB2_BUF_STATE_ERROR);
+}
+
+/*
+ * video ioctls
+ */
+static int vidioc_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	strncpy(cap->driver, SUNXI_CEDRUS_NAME, sizeof(cap->driver) - 1);
+	strncpy(cap->card, SUNXI_CEDRUS_NAME, sizeof(cap->card) - 1);
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s", SUNXI_CEDRUS_NAME);
+	cap->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
+{
+	int i, num;
+	struct sunxi_cedrus_fmt *fmt;
+
+	num = 0;
+
+	for (i = 0; i < NUM_FORMATS; ++i) {
+		if (formats[i].types & type) {
+			/* index-th format of type type found ? */
+			if (num == f->index)
+				break;
+			/*
+			 * Correct type but haven't reached our index yet,
+			 * just increment per-type index
+			 */
+			++num;
+		}
+	}
+
+	if (i < NUM_FORMATS) {
+		/* Format found */
+		fmt = &formats[i];
+		f->pixelformat = fmt->fourcc;
+		return 0;
+	}
+
+	/* Format not found */
+	return -EINVAL;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	return enum_fmt(f, SUNXI_CEDRUS_CAPTURE);
+}
+
+static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	return enum_fmt(f, SUNXI_CEDRUS_OUTPUT);
+}
+
+static int vidioc_g_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
+{
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		f->fmt.pix_mp = ctx->dst_fmt;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		f->fmt.pix_mp = ctx->src_fmt;
+		break;
+	default:
+		dev_dbg(ctx->dev->dev, "invalid buf type\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	return vidioc_g_fmt(file2ctx(file), f);
+}
+
+static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	return vidioc_g_fmt(file2ctx(file), f);
+}
+
+static int vidioc_try_fmt(struct v4l2_format *f, struct sunxi_cedrus_fmt *fmt)
+{
+	int i;
+	__u32 bpl;
+
+	f->fmt.pix_mp.field = V4L2_FIELD_NONE;
+	f->fmt.pix_mp.num_planes = fmt->num_planes;
+
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		if (f->fmt.pix_mp.plane_fmt[0].sizeimage == 0)
+			return -EINVAL;
+
+		f->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		/* Limit to hardware min/max. */
+		f->fmt.pix_mp.width = clamp(f->fmt.pix_mp.width,
+			SUNXI_CEDRUS_MIN_WIDTH, SUNXI_CEDRUS_MAX_WIDTH);
+		f->fmt.pix_mp.height = clamp(f->fmt.pix_mp.height,
+			SUNXI_CEDRUS_MIN_HEIGHT, SUNXI_CEDRUS_MAX_HEIGHT);
+
+		for (i = 0; i < f->fmt.pix_mp.num_planes; ++i) {
+			bpl = (f->fmt.pix_mp.width * fmt->depth) >> 3;
+			f->fmt.pix_mp.plane_fmt[i].bytesperline = bpl;
+			f->fmt.pix_mp.plane_fmt[i].sizeimage =
+				f->fmt.pix_mp.height * bpl;
+		}
+		break;
+	}
+	return 0;
+}
+
+static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct sunxi_cedrus_fmt *fmt;
+	struct sunxi_cedrus_ctx *ctx = file2ctx(file);
+
+	fmt = find_format(f);
+	if (!fmt) {
+		f->fmt.pix_mp.pixelformat = formats[0].fourcc;
+		fmt = find_format(f);
+	}
+	if (!(fmt->types & SUNXI_CEDRUS_CAPTURE)) {
+		v4l2_err(&ctx->dev->v4l2_dev,
+			 "Fourcc format (0x%08x) invalid.\n",
+			 f->fmt.pix_mp.pixelformat);
+		return -EINVAL;
+	}
+
+	return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct sunxi_cedrus_fmt *fmt;
+	struct sunxi_cedrus_ctx *ctx = file2ctx(file);
+
+	fmt = find_format(f);
+	if (!fmt) {
+		f->fmt.pix_mp.pixelformat = formats[0].fourcc;
+		fmt = find_format(f);
+	}
+	if (!(fmt->types & SUNXI_CEDRUS_OUTPUT)) {
+		v4l2_err(&ctx->dev->v4l2_dev,
+			 "Fourcc format (0x%08x) invalid.\n",
+			 f->fmt.pix_mp.pixelformat);
+		return -EINVAL;
+	}
+
+	return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_s_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
+{
+	struct sunxi_cedrus_dev *dev = ctx->dev;
+	struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
+	struct sunxi_cedrus_fmt *fmt;
+	int i, ret = 0;
+
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		ctx->vpu_src_fmt = find_format(f);
+		ctx->src_fmt = *pix_fmt_mp;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		fmt = find_format(f);
+		ctx->vpu_dst_fmt = fmt;
+
+		for (i = 0; i < fmt->num_planes; ++i) {
+			pix_fmt_mp->plane_fmt[i].bytesperline =
+				pix_fmt_mp->width * fmt->depth;
+			pix_fmt_mp->plane_fmt[i].sizeimage =
+				pix_fmt_mp->plane_fmt[i].bytesperline
+				* pix_fmt_mp->height;
+		}
+		ctx->dst_fmt = *pix_fmt_mp;
+		break;
+	default:
+		dev_dbg(ctx->dev->dev, "invalid buf type\n");
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	int ret;
+
+	ret = vidioc_try_fmt_vid_cap(file, priv, f);
+	if (ret)
+		return ret;
+
+	return vidioc_s_fmt(file2ctx(file), f);
+}
+
+static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	int ret;
+
+	ret = vidioc_try_fmt_vid_out(file, priv, f);
+	if (ret)
+		return ret;
+
+	ret = vidioc_s_fmt(file2ctx(file), f);
+	return ret;
+}
+
+const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops = {
+	.vidioc_querycap	= vidioc_querycap,
+
+	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap_mplane	= vidioc_g_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap_mplane	= vidioc_try_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap_mplane	= vidioc_s_fmt_vid_cap,
+
+	.vidioc_enum_fmt_vid_out_mplane = vidioc_enum_fmt_vid_out,
+	.vidioc_g_fmt_vid_out_mplane	= vidioc_g_fmt_vid_out,
+	.vidioc_try_fmt_vid_out_mplane	= vidioc_try_fmt_vid_out,
+	.vidioc_s_fmt_vid_out_mplane	= vidioc_s_fmt_vid_out,
+
+	.vidioc_reqbufs		= v4l2_m2m_ioctl_reqbufs,
+	.vidioc_querybuf	= v4l2_m2m_ioctl_querybuf,
+	.vidioc_qbuf		= v4l2_m2m_ioctl_qbuf,
+	.vidioc_dqbuf		= v4l2_m2m_ioctl_dqbuf,
+	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
+	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
+	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
+
+	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
+	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
+
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/*
+ * Queue operations
+ */
+
+static int sunxi_cedrus_queue_setup(struct vb2_queue *vq, unsigned int *nbufs,
+				    unsigned int *nplanes, unsigned int sizes[],
+				    struct device *alloc_devs[])
+{
+	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vq);
+
+	if (*nbufs < 1)
+		*nbufs = 1;
+
+	if (*nbufs > VIDEO_MAX_FRAME)
+		*nbufs = VIDEO_MAX_FRAME;
+
+	switch (vq->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		*nplanes = ctx->vpu_src_fmt->num_planes;
+
+		sizes[0] = ctx->src_fmt.plane_fmt[0].sizeimage;
+		break;
+
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		*nplanes = ctx->vpu_dst_fmt->num_planes;
+
+		sizes[0] = round_up(ctx->dst_fmt.plane_fmt[0].sizeimage, 8);
+		sizes[1] = sizes[0];
+		break;
+
+	default:
+		dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int sunxi_cedrus_buf_init(struct vb2_buffer *vb)
+{
+	struct vb2_queue *vq = vb->vb2_queue;
+	struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
+			struct sunxi_cedrus_ctx, fh);
+
+	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		ctx->dst_bufs[vb->index] = vb;
+
+	return 0;
+}
+
+static void sunxi_cedrus_buf_cleanup(struct vb2_buffer *vb)
+{
+	struct vb2_queue *vq = vb->vb2_queue;
+	struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
+			struct sunxi_cedrus_ctx, fh);
+
+	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		ctx->dst_bufs[vb->index] = NULL;
+}
+
+static int sunxi_cedrus_buf_prepare(struct vb2_buffer *vb)
+{
+	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct vb2_queue *vq = vb->vb2_queue;
+	int i;
+
+	dev_dbg(ctx->dev->dev, "type: %d\n", vb->vb2_queue->type);
+
+	switch (vq->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		if (vb2_plane_size(vb, 0)
+		    < ctx->src_fmt.plane_fmt[0].sizeimage) {
+			dev_dbg(ctx->dev->dev, "plane too small for output\n");
+			return -EINVAL;
+		}
+		break;
+
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		for (i = 0; i < ctx->vpu_dst_fmt->num_planes; ++i) {
+			if (vb2_plane_size(vb, i)
+			    < ctx->dst_fmt.plane_fmt[i].sizeimage) {
+				dev_dbg(ctx->dev->dev,
+					"plane %d too small for capture\n", i);
+				break;
+			}
+		}
+
+		if (i != ctx->vpu_dst_fmt->num_planes)
+			return -EINVAL;
+		break;
+
+	default:
+		dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void sunxi_cedrus_stop_streaming(struct vb2_queue *q)
+{
+	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(q);
+	struct vb2_v4l2_buffer *vbuf;
+	unsigned long flags;
+
+	for (;;) {
+		if (V4L2_TYPE_IS_OUTPUT(q->type))
+			vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+		else
+			vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+		if (!vbuf)
+			return;
+		spin_lock_irqsave(&ctx->dev->irqlock, flags);
+		v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+		spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
+	}
+}
+
+static void sunxi_cedrus_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static struct vb2_ops sunxi_cedrus_qops = {
+	.queue_setup	 = sunxi_cedrus_queue_setup,
+	.buf_prepare	 = sunxi_cedrus_buf_prepare,
+	.buf_init	 = sunxi_cedrus_buf_init,
+	.buf_cleanup	 = sunxi_cedrus_buf_cleanup,
+	.buf_queue	 = sunxi_cedrus_buf_queue,
+	.stop_streaming  = sunxi_cedrus_stop_streaming,
+	.wait_prepare	 = vb2_ops_wait_prepare,
+	.wait_finish	 = vb2_ops_wait_finish,
+};
+
+int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
+{
+	struct sunxi_cedrus_ctx *ctx = priv;
+	int ret;
+
+	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+	src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+	src_vq->drv_priv = ctx;
+	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	src_vq->ops = &sunxi_cedrus_qops;
+	src_vq->mem_ops = &vb2_dma_contig_memops;
+	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	src_vq->lock = &ctx->dev->dev_mutex;
+	src_vq->v4l2_allow_requests = true;
+	src_vq->dev = ctx->dev->dev;
+
+	ret = vb2_queue_init(src_vq);
+	if (ret)
+		return ret;
+
+	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+	dst_vq->drv_priv = ctx;
+	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	dst_vq->ops = &sunxi_cedrus_qops;
+	dst_vq->mem_ops = &vb2_dma_contig_memops;
+	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	dst_vq->lock = &ctx->dev->dev_mutex;
+	dst_vq->v4l2_allow_requests = true;
+	dst_vq->dev = ctx->dev->dev;
+
+	return vb2_queue_init(dst_vq);
+}
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
new file mode 100644
index 0000000..f0ac921
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
@@ -0,0 +1,33 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef SUNXI_CEDRUS_DEC_H_
+#define SUNXI_CEDRUS_DEC_H_
+
+int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq);
+
+void job_abort(void *priv);
+void device_run(void *priv);
+
+extern const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops;
+
+#endif /* SUNXI_CEDRUS_DEC_H_ */
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
new file mode 100644
index 0000000..72b9df4
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
@@ -0,0 +1,153 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * And reverse engineering efforts of the 'Cedrus' project
+ * Copyright (c) 2013-2014 Jens Kuske <jenskuske@gmail.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 "sunxi_cedrus_common.h"
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/reset.h>
+
+#include <media/v4l2-mem2mem.h>
+#include <media/videobuf2-core.h>
+
+/*
+ * Interrupt handlers.
+ */
+
+static irqreturn_t sunxi_cedrus_ve_irq(int irq, void *dev_id)
+{
+	struct sunxi_cedrus_dev *vpu = dev_id;
+	struct sunxi_cedrus_ctx *curr_ctx;
+	struct vb2_v4l2_buffer *src_vb, *dst_vb;
+	int val;
+	unsigned long flags;
+
+	curr_ctx = v4l2_m2m_get_curr_priv(vpu->m2m_dev);
+
+	if (!curr_ctx) {
+		pr_err("Instance released before the end of transaction\n");
+		return IRQ_HANDLED;
+	}
+
+	src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
+	dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
+
+	spin_lock_irqsave(&vpu->irqlock, flags);
+	v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR);
+	v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR);
+	spin_unlock_irqrestore(&vpu->irqlock, flags);
+
+	v4l2_m2m_job_finish(vpu->m2m_dev, curr_ctx->fh.m2m_ctx);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Initialization/clean-up.
+ */
+
+int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *vpu)
+{
+	struct resource *res;
+	int irq_dec;
+	int ret;
+
+	irq_dec = platform_get_irq(vpu->pdev, 0);
+	if (irq_dec <= 0) {
+		dev_err(vpu->dev, "could not get ve IRQ\n");
+		return -ENXIO;
+	}
+	ret = devm_request_irq(vpu->dev, irq_dec, sunxi_cedrus_ve_irq, 0,
+			       dev_name(vpu->dev), vpu);
+	if (ret) {
+		dev_err(vpu->dev, "could not request ve IRQ\n");
+		return -ENXIO;
+	}
+
+	ret = of_reserved_mem_device_init(vpu->dev);
+	if (ret) {
+		dev_err(vpu->dev, "could not reserve memory\n");
+		return -ENODEV;
+	}
+
+	vpu->ahb_clk = devm_clk_get(vpu->dev, "ahb");
+	if (IS_ERR(vpu->ahb_clk)) {
+		dev_err(vpu->dev, "failed to get ahb clock\n");
+		return PTR_ERR(vpu->ahb_clk);
+	}
+	vpu->mod_clk = devm_clk_get(vpu->dev, "mod");
+	if (IS_ERR(vpu->mod_clk)) {
+		dev_err(vpu->dev, "failed to get mod clock\n");
+		return PTR_ERR(vpu->mod_clk);
+	}
+	vpu->ram_clk = devm_clk_get(vpu->dev, "ram");
+	if (IS_ERR(vpu->ram_clk)) {
+		dev_err(vpu->dev, "failed to get ram clock\n");
+		return PTR_ERR(vpu->ram_clk);
+	}
+
+	vpu->rstc = devm_reset_control_get(vpu->dev, NULL);
+
+	res = platform_get_resource(vpu->pdev, IORESOURCE_MEM, 0);
+	vpu->base = devm_ioremap_resource(vpu->dev, res);
+	if (!vpu->base)
+		dev_err(vpu->dev, "could not maps MACC registers\n");
+
+	ret = clk_prepare_enable(vpu->ahb_clk);
+	if (ret) {
+		dev_err(vpu->dev, "could not enable ahb clock\n");
+		return -EFAULT;
+	}
+	ret = clk_prepare_enable(vpu->mod_clk);
+	if (ret) {
+		clk_disable_unprepare(vpu->ahb_clk);
+		dev_err(vpu->dev, "could not enable mod clock\n");
+		return -EFAULT;
+	}
+	ret = clk_prepare_enable(vpu->ram_clk);
+	if (ret) {
+		clk_disable_unprepare(vpu->mod_clk);
+		clk_disable_unprepare(vpu->ahb_clk);
+		dev_err(vpu->dev, "could not enable ram clock\n");
+		return -EFAULT;
+	}
+
+	reset_control_assert(vpu->rstc);
+	reset_control_deassert(vpu->rstc);
+
+	return 0;
+}
+
+void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *vpu)
+{
+	clk_disable_unprepare(vpu->ram_clk);
+	clk_disable_unprepare(vpu->mod_clk);
+	clk_disable_unprepare(vpu->ahb_clk);
+
+	of_reserved_mem_device_release(vpu->dev);
+}
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
new file mode 100644
index 0000000..3c9199b
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
@@ -0,0 +1,32 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on vim2m
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef SUNXI_CEDRUS_HW_H_
+#define SUNXI_CEDRUS_HW_H_
+
+struct sunxi_cedrus_dev;
+struct sunxi_cedrus_ctx;
+
+int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *vpu);
+void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *vpu);
+
+#endif /* SUNXI_CEDRUS_HW_H_ */
diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
new file mode 100644
index 0000000..7384daa
--- /dev/null
+++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
@@ -0,0 +1,170 @@
+/*
+ * Sunxi Cedrus codec driver
+ *
+ * Copyright (C) 2016 Florent Revest
+ * Florent Revest <florent.revest@free-electrons.com>
+ *
+ * Based on Cedrus
+ *
+ * Copyright (c) 2013 Jens Kuske <jenskuske@gmail.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef SUNXI_CEDRUS_REGS_H
+#define SUNXI_CEDRUS_REGS_H
+
+/*
+ * For more information consult http://linux-sunxi.org/VE_Register_guide
+ */
+
+/* Special registers values */
+
+/* VE_CTRL:
+ * The first 3 bits indicate the engine (0 for MPEG, 1 for H264, b for AVC...)
+ * The 16th and 17th bits indicate the memory type (3 for DDR3 32 bits)
+ * The 20th bit is unknown but needed
+ */
+#define VE_CTRL_MPEG		0x130000
+#define VE_CTRL_H264		0x130001
+#define VE_CTRL_AVC		0x13000b
+#define VE_CTRL_REINIT		0x130007
+
+/* VE_MPEG_CTRL:
+ * The bit 3 (0x8) is used to enable IRQs
+ * The other bits are unknown but needed
+ */
+#define VE_MPEG_CTRL_MPEG2	0x800001b8
+#define VE_MPEG_CTRL_MPEG4	(0x80084118 | BIT(7))
+#define VE_MPEG_CTRL_MPEG4_P	(VE_MPEG_CTRL_MPEG4 | BIT(12))
+
+/* VE_MPEG_VLD_ADDR:
+ * The bits 27 to 4 are used for the address
+ * The bits 31 to 28 (0x7) are used to select the MPEG or JPEG engine
+ */
+#define VE_MPEG_VLD_ADDR_VAL(x)	((x & 0x0ffffff0) | (x >> 28) | (0x7 << 28))
+
+/* VE_MPEG_TRIGGER:
+ * The first three bits are used to trigger the engine
+ * The bits 24 to 26 are used to select the input format (1 for MPEG1, 2 for 
+ *                           MPEG2, 4 for MPEG4)
+ * The bit 21 (0x8) is used to disable bitstream error handling
+ *
+ * In MPEG4 the w*h value is somehow used for an offset, unknown but needed
+ */
+#define VE_TRIG_MPEG1		0x8100000f
+#define VE_TRIG_MPEG2		0x8200000f
+#define VE_TRIG_MPEG4(w, h)	(0x8400000d | ((w * h) << 8))
+
+/* VE_MPEG_SDROT_CTRL:
+ * The bit 8 at zero is used to disable x downscaling
+ * The bit 10 at 0 is used to disable y downscaling
+ * The other bits are unknown but needed
+ */
+#define VE_NO_SDROT_CTRL	0x40620000
+
+/* Decent size fo video buffering verifier */
+#define VBV_SIZE		(1024 * 1024)
+
+/* Registers addresses */
+#define VE_CTRL				0x000
+#define VE_VERSION			0x0f0
+
+#define VE_MPEG_PIC_HDR			0x100
+#define VE_MPEG_VOP_HDR			0x104
+#define VE_MPEG_SIZE			0x108
+#define VE_MPEG_FRAME_SIZE		0x10c
+#define VE_MPEG_MBA			0x110
+#define VE_MPEG_CTRL			0x114
+#define VE_MPEG_TRIGGER			0x118
+#define VE_MPEG_STATUS			0x11c
+#define VE_MPEG_TRBTRD_FIELD		0x120
+#define VE_MPEG_TRBTRD_FRAME		0x124
+#define VE_MPEG_VLD_ADDR		0x128
+#define VE_MPEG_VLD_OFFSET		0x12c
+#define VE_MPEG_VLD_LEN			0x130
+#define VE_MPEG_VLD_END			0x134
+#define VE_MPEG_MBH_ADDR		0x138
+#define VE_MPEG_DCAC_ADDR		0x13c
+#define VE_MPEG_NCF_ADDR		0x144
+#define VE_MPEG_REC_LUMA		0x148
+#define VE_MPEG_REC_CHROMA		0x14c
+#define VE_MPEG_FWD_LUMA		0x150
+#define VE_MPEG_FWD_CHROMA		0x154
+#define VE_MPEG_BACK_LUMA		0x158
+#define VE_MPEG_BACK_CHROMA		0x15c
+#define VE_MPEG_IQ_MIN_INPUT		0x180
+#define VE_MPEG_QP_INPUT		0x184
+#define VE_MPEG_JPEG_SIZE		0x1b8
+#define VE_MPEG_JPEG_RES_INT		0x1c0
+#define VE_MPEG_ERROR			0x1c4
+#define VE_MPEG_CTR_MB			0x1c8
+#define VE_MPEG_ROT_LUMA		0x1cc
+#define VE_MPEG_ROT_CHROMA		0x1d0
+#define VE_MPEG_SDROT_CTRL		0x1d4
+#define VE_MPEG_RAM_WRITE_PTR		0x1e0
+#define VE_MPEG_RAM_WRITE_DATA		0x1e4
+
+#define VE_H264_FRAME_SIZE		0x200
+#define VE_H264_PIC_HDR			0x204
+#define VE_H264_SLICE_HDR		0x208
+#define VE_H264_SLICE_HDR2		0x20c
+#define VE_H264_PRED_WEIGHT		0x210
+#define VE_H264_QP_PARAM		0x21c
+#define VE_H264_CTRL			0x220
+#define VE_H264_TRIGGER			0x224
+#define VE_H264_STATUS			0x228
+#define VE_H264_CUR_MB_NUM		0x22c
+#define VE_H264_VLD_ADDR		0x230
+#define VE_H264_VLD_OFFSET		0x234
+#define VE_H264_VLD_LEN			0x238
+#define VE_H264_VLD_END			0x23c
+#define VE_H264_SDROT_CTRL		0x240
+#define VE_H264_OUTPUT_FRAME_IDX	0x24c
+#define VE_H264_EXTRA_BUFFER1		0x250
+#define VE_H264_EXTRA_BUFFER2		0x254
+#define VE_H264_BASIC_BITS		0x2dc
+#define VE_H264_RAM_WRITE_PTR		0x2e0
+#define VE_H264_RAM_WRITE_DATA		0x2e4
+
+#define VE_SRAM_H264_PRED_WEIGHT_TABLE	0x000
+#define VE_SRAM_H264_FRAMEBUFFER_LIST	0x400
+#define VE_SRAM_H264_REF_LIST0		0x640
+#define VE_SRAM_H264_REF_LIST1		0x664
+#define VE_SRAM_H264_SCALING_LISTS	0x800
+
+#define VE_ISP_INPUT_SIZE		0xa00
+#define VE_ISP_INPUT_STRIDE		0xa04
+#define VE_ISP_CTRL			0xa08
+#define VE_ISP_INPUT_LUMA		0xa78
+#define VE_ISP_INPUT_CHROMA		0xa7c
+
+#define VE_AVC_PARAM			0xb04
+#define VE_AVC_QP			0xb08
+#define VE_AVC_MOTION_EST		0xb10
+#define VE_AVC_CTRL			0xb14
+#define VE_AVC_TRIGGER			0xb18
+#define VE_AVC_STATUS			0xb1c
+#define VE_AVC_BASIC_BITS		0xb20
+#define VE_AVC_UNK_BUF			0xb60
+#define VE_AVC_VLE_ADDR			0xb80
+#define VE_AVC_VLE_END			0xb84
+#define VE_AVC_VLE_OFFSET		0xb88
+#define VE_AVC_VLE_MAX			0xb8c
+#define VE_AVC_VLE_LENGTH		0xb90
+#define VE_AVC_REF_LUMA			0xba0
+#define VE_AVC_REF_CHROMA		0xba4
+#define VE_AVC_REC_LUMA			0xbb0
+#define VE_AVC_REC_CHROMA		0xbb4
+#define VE_AVC_REF_SLUMA		0xbb8
+#define VE_AVC_REC_SLUMA		0xbbc
+#define VE_AVC_MB_INFO			0xbc0
+
+#endif /* SUNXI_CEDRUS_REGS_H */
-- 
2.7.4