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Exynos4 JPEG codec v4l2 driver

From:  Andrzej Pietrasiewicz <andrzej.p@samsung.com>
To:  linux-media@vger.kernel.org
Subject:  [PATCH v3][media] Exynos4 JPEG codec v4l2 driver
Date:  Thu, 17 Nov 2011 10:41:11 +0100
Message-ID:  <1321522871-9222-1-git-send-email-andrzej.p@samsung.com>
Cc:  Andrzej Pietrasiewicz <andrzej.p@samsung.com>, Kyungmin Park <kyungmin.park@samsung.com>, Marek Szyprowski <m.szyprowski@samsung.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Sakari Ailus <sakari.ailus@iki.fi>
Archive-link:  Article

Add driver for the JPEG codec IP block available in Samsung Exynos SoC series.

The driver is implemented as a V4L2 mem-to-mem device. It exposes two video
nodes to user space, one for the encoding part, and one for the decoding part.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---

Dear All,

This is the third version of the Exynos4 JPEG codec v4l2 driver. It includes
modifications resulting from Sylwester Nawrocki's review - thanks Sylwester.

Summary of changes in v3:

- adapt to changes in selection ioctl names
- eliminate unnecessary #defines in register definition file
- avoid unnecessary bit shifting (change unsigned short to unsigned int
in parameter lists of register manipulation functions)

Summary of changes in v2:

- various fixes (Kconfig and Makefile cleanup, variable definitions inside
scopes, simplifying some loops, removal of useless variables, factoring out some
common code into functions, moving #defines to header and so on)
- get_byte errors handling in JPEG header parsing
- strlcpy instead of strncpy
- clamp JPEG quality setting instead of returning error
- move quantisation and Huffman tables into jpeg-core.c so that they are not
duplicated in case jpeg-hw.h is included somewhere else
- squash similar functions in hardware handling code in jpeg-hw.h
- introduce explicit "mask & shift" approach in register definition file
- squash similar macros in register definition file
- pr_<level>() instead of printk(KERN_<LEVEL)
- pm_runtime usage adjustment

Summary of v1:

This patch contains a driver for the JPEG codec integrated peripheral found
in the Samsung Exynos4 SoC.

The driver is implemented within the V4L2 framework as a mem-to-mem device.

It presents two video nodes to userspace, one for the encoding part, and one
for the decoding part.

From a userspace point of view the encoding process is typical (S_FMT, REQBUF,
optionally QUERYBUF, QBUF, STREAMON, DQBUF) for both the source and destination
queues. The decoding process requires that the source queue performs S_FMT,
REQBUF, (QUERYBUF), QBUF and STREAMON. After STREAMON on the source queue,
it is possible to perform G_FMT on the destination queue to find out the
processed image width and height in order to be able to allocate an appropriate
buffer - it is assumed that the user does not pass the compressed image width
and height but instead this information is parsed from the jpeg input. Although
this is done in kernel, there seems no better way since the JPEG IP in this SoC
cannot stop after it parses the jpeg input header, so once it starts operation,
it needs to already have an appropriately-sized buffer to store decompression
results. Then REQBUF, QBUF and STREAMON on the destination queue complete the
decoding and it is possible to DQBUF from both queues and finish the operation.

During encoding the available formats are: V4L2_PIX_FMT_RGB565X and
V4L2_PIX_FMT_YUYV for source and V4L2_PIX_FMT_YUYV and V4L2_PIX_FMT_YUV420 for
destination.

During decoding the available formats are: V4L2_PIX_FMT_JPEG for source and
V4L2_PIX_FMT_YUYV and V4L2_PIX_FMT_YUV420 for destination.

In order for the driver to work a separate board definition and device
registration patch is required; it is sent to linux-samsung-soc mailing list.

================================================================================

Patch summary:

Andrzej Pietrasiewicz (1):
  [media] Exynos4 JPEG codec v4l2 driver

 drivers/media/video/Kconfig              |    8 +
 drivers/media/video/Makefile             |    1 +
 drivers/media/video/s5p-jpeg/Makefile    |    2 +
 drivers/media/video/s5p-jpeg/jpeg-core.c | 1501 ++++++++++++++++++++++++++++++
 drivers/media/video/s5p-jpeg/jpeg-core.h |  145 +++
 drivers/media/video/s5p-jpeg/jpeg-hw.h   |  353 +++++++
 drivers/media/video/s5p-jpeg/jpeg-regs.h |  170 ++++
 7 files changed, 2180 insertions(+), 0 deletions(-)
 create mode 100644 drivers/media/video/s5p-jpeg/Makefile
 create mode 100644 drivers/media/video/s5p-jpeg/jpeg-core.c
 create mode 100644 drivers/media/video/s5p-jpeg/jpeg-core.h
 create mode 100644 drivers/media/video/s5p-jpeg/jpeg-hw.h
 create mode 100644 drivers/media/video/s5p-jpeg/jpeg-regs.h

diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 16e923b..5fd30e6 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -1107,6 +1107,14 @@ config VIDEO_SAMSUNG_S5P_G2D
 	  This is a v4l2 driver for Samsung S5P and EXYNOS4 G2D
 	  2d graphics accelerator.
 
+config VIDEO_SAMSUNG_S5P_JPEG
+	tristate "Samsung S5P JPEG codec driver"
+	depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	---help---
+	  This is a v4l2 driver for Samsung S5P and EXYNOS4 JPEG codec
+
 config VIDEO_SAMSUNG_S5P_MFC
 	tristate "Samsung S5P MFC 5.1 Video Codec"
 	depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 9dc88e9..7e1d4a0 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -176,6 +176,7 @@ obj-$(CONFIG_VIDEO_OMAP1)		+= omap1_camera.o
 obj-$(CONFIG_VIDEO_ATMEL_ISI)		+= atmel-isi.o
 
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) 	+= s5p-fimc/
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG)	+= s5p-jpeg/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC)	+= s5p-mfc/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV)	+= s5p-tv/
 
diff --git a/drivers/media/video/s5p-jpeg/Makefile b/drivers/media/video/s5p-jpeg/Makefile
new file mode 100644
index 0000000..ddc2900
--- /dev/null
+++ b/drivers/media/video/s5p-jpeg/Makefile
@@ -0,0 +1,2 @@
+s5p-jpeg-objs := jpeg-core.o
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) := s5p-jpeg.o
diff --git a/drivers/media/video/s5p-jpeg/jpeg-core.c b/drivers/media/video/s5p-jpeg/jpeg-core.c
new file mode 100644
index 0000000..f5edc78
--- /dev/null
+++ b/drivers/media/video/s5p-jpeg/jpeg-core.c
@@ -0,0 +1,1501 @@
+/* linux/drivers/media/video/s5p-jpeg/jpeg-core.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "jpeg-core.h"
+#include "jpeg-hw.h"
+
+static struct s5p_jpeg_fmt formats_enc[] = {
+	{
+		.name	= "YUV 4:2:0, YCbCr",
+		.fourcc = V4L2_PIX_FMT_YUV420,
+		.depth	= 12,
+		.types	= MEM2MEM_CAPTURE,
+	},
+	{
+		.name	= "YUV 4:2:2, YCbYCr",
+		.fourcc = V4L2_PIX_FMT_YUYV,
+		.depth	= 16,
+		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
+	},
+	{
+		.name	= "RGB565",
+		.fourcc	= V4L2_PIX_FMT_RGB565X,
+		.depth	= 16,
+		.types	= MEM2MEM_OUTPUT,
+	},
+};
+#define NUM_FORMATS_ENC ARRAY_SIZE(formats_enc)
+
+static struct s5p_jpeg_fmt formats_dec[] = {
+	{
+		.name		= "YUV 4:2:0, YCbCr",
+		.fourcc		= V4L2_PIX_FMT_YUV420,
+		.depth		= 12,
+		.h_align	= 4,
+		.v_align	= 4,
+		.types		= MEM2MEM_CAPTURE,
+	},
+	{
+		.name		= "YUV 4:2:2, YCbYCr",
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+		.depth		= 16,
+		.h_align	= 4,
+		.v_align	= 3,
+		.types		= MEM2MEM_CAPTURE,
+	},
+	{
+		.name		= "JPEG JFIF",
+		.fourcc		= V4L2_PIX_FMT_JPEG,
+		.types		= MEM2MEM_OUTPUT,
+	},
+};
+#define NUM_FORMATS_DEC ARRAY_SIZE(formats_dec)
+
+static const unsigned char qtbl_luminance[4][64] = {
+	{/* level 1 - high quality */
+		 8,  6,  6,  8, 12, 14, 16, 17,
+		 6,  6,  6,  8, 10, 13, 12, 15,
+		 6,  6,  7,  8, 13, 14, 18, 24,
+		 8,  8,  8, 14, 13, 19, 24, 35,
+		12, 10, 13, 13, 20, 26, 34, 39,
+		14, 13, 14, 19, 26, 34, 39, 39,
+		16, 12, 18, 24, 34, 39, 39, 39,
+		17, 15, 24, 35, 39, 39, 39, 39
+	},
+	{/* level 2 */
+		12,  8,  8, 12, 17, 21, 24, 23,
+		 8,  9,  9, 11, 15, 19, 18, 23,
+		 8,  9, 10, 12, 19, 20, 27, 36,
+		12, 11, 12, 21, 20, 28, 36, 53,
+		17, 15, 19, 20, 30, 39, 51, 59,
+		21, 19, 20, 28, 39, 51, 59, 59,
+		24, 18, 27, 36, 51, 59, 59, 59,
+		23, 23, 36, 53, 59, 59, 59, 59
+	},
+	{/* level 3 */
+		16, 11, 11, 16, 23, 27, 31, 30,
+		11, 12, 12, 15, 20, 23, 23, 30,
+		11, 12, 13, 16, 23, 26, 35, 47,
+		16, 15, 16, 23, 26, 37, 47, 64,
+		23, 20, 23, 26, 39, 51, 64, 64,
+		27, 23, 26, 37, 51, 64, 64, 64,
+		31, 23, 35, 47, 64, 64, 64, 64,
+		30, 30, 47, 64, 64, 64, 64, 64
+	},
+	{/*level 4 - low quality */
+		20, 16, 25, 39, 50, 46, 62, 68,
+		16, 18, 23, 38, 38, 53, 65, 68,
+		25, 23, 31, 38, 53, 65, 68, 68,
+		39, 38, 38, 53, 65, 68, 68, 68,
+		50, 38, 53, 65, 68, 68, 68, 68,
+		46, 53, 65, 68, 68, 68, 68, 68,
+		62, 65, 68, 68, 68, 68, 68, 68,
+		68, 68, 68, 68, 68, 68, 68, 68
+	}
+};
+
+static const unsigned char qtbl_chrominance[4][64] = {
+	{/* level 1 - high quality */
+		 9,  8,  9, 11, 14, 17, 19, 24,
+		 8, 10,  9, 11, 14, 13, 17, 22,
+		 9,  9, 13, 14, 13, 15, 23, 26,
+		11, 11, 14, 14, 15, 20, 26, 33,
+		14, 14, 13, 15, 20, 24, 33, 39,
+		17, 13, 15, 20, 24, 32, 39, 39,
+		19, 17, 23, 26, 33, 39, 39, 39,
+		24, 22, 26, 33, 39, 39, 39, 39
+	},
+	{/* level 2 */
+		13, 11, 13, 16, 20, 20, 29, 37,
+		11, 14, 14, 14, 16, 20, 26, 32,
+		13, 14, 15, 17, 20, 23, 35, 40,
+		16, 14, 17, 21, 23, 30, 40, 50,
+		20, 16, 20, 23, 30, 37, 50, 59,
+		20, 20, 23, 30, 37, 48, 59, 59,
+		29, 26, 35, 40, 50, 59, 59, 59,
+		37, 32, 40, 50, 59, 59, 59, 59
+	},
+	{/* level 3 */
+		17, 15, 17, 21, 20, 26, 38, 48,
+		15, 19, 18, 17, 20, 26, 35, 43,
+		17, 18, 20, 22, 26, 30, 46, 53,
+		21, 17, 22, 28, 30, 39, 53, 64,
+		20, 20, 26, 30, 39, 48, 64, 64,
+		26, 26, 30, 39, 48, 63, 64, 64,
+		38, 35, 46, 53, 64, 64, 64, 64,
+		48, 43, 53, 64, 64, 64, 64, 64
+	},
+	{/*level 4 - low quality */
+		21, 25, 32, 38, 54, 68, 68, 68,
+		25, 28, 24, 38, 54, 68, 68, 68,
+		32, 24, 32, 43, 66, 68, 68, 68,
+		38, 38, 43, 53, 68, 68, 68, 68,
+		54, 54, 66, 68, 68, 68, 68, 68,
+		68, 68, 68, 68, 68, 68, 68, 68,
+		68, 68, 68, 68, 68, 68, 68, 68,
+		68, 68, 68, 68, 68, 68, 68, 68
+	}
+};
+
+static const unsigned char hdctbl0[16] = {
+	0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
+};
+
+static const unsigned char hdctblg0[12] = {
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb
+};
+static const unsigned char hactbl0[16] = {
+	0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
+};
+static const unsigned char hactblg0[162] = {
+	0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
+	0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
+	0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
+	0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
+	0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
+	0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
+	0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+	0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
+	0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
+	0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
+	0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
+	0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
+	0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
+	0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+	0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
+	0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
+	0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
+	0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
+	0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
+	0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+	0xf9, 0xfa
+};
+
+static inline void jpeg_set_qtbl(void __iomem *regs, const unsigned char *qtbl,
+		   unsigned long tab, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++)
+		writel((unsigned int)qtbl[i], regs + tab + (i * 0x04));
+}
+
+static inline void jpeg_set_qtbl_lum(void __iomem *regs, int quality)
+{
+	/* this driver fills quantisation table 0 with data for luma */
+	jpeg_set_qtbl(regs, qtbl_luminance[quality], S5P_JPG_QTBL_CONTENT(0),
+		      ARRAY_SIZE(qtbl_luminance[quality]));
+}
+
+static inline void jpeg_set_qtbl_chr(void __iomem *regs, int quality)
+{
+	/* this driver fills quantisation table 1 with data for chroma */
+	jpeg_set_qtbl(regs, qtbl_chrominance[quality], S5P_JPG_QTBL_CONTENT(1),
+		      ARRAY_SIZE(qtbl_chrominance[quality]));
+}
+
+static inline void jpeg_set_htbl(void __iomem *regs, const unsigned char *htbl,
+		   unsigned long tab, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++)
+		writel((unsigned int)htbl[i], regs + tab + (i * 0x04));
+}
+
+static inline void jpeg_set_hdctbl(void __iomem *regs)
+{
+	/* this driver fills table 0 for this component */
+	jpeg_set_htbl(regs, hdctbl0, S5P_JPG_HDCTBL(0), ARRAY_SIZE(hdctbl0));
+}
+
+static inline void jpeg_set_hdctblg(void __iomem *regs)
+{
+	/* this driver fills table 0 for this component */
+	jpeg_set_htbl(regs, hdctblg0, S5P_JPG_HDCTBLG(0), ARRAY_SIZE(hdctblg0));
+}
+
+static inline void jpeg_set_hactbl(void __iomem *regs)
+{
+	/* this driver fills table 0 for this component */
+	jpeg_set_htbl(regs, hactbl0, S5P_JPG_HACTBL(0), ARRAY_SIZE(hactbl0));
+}
+
+static inline void jpeg_set_hactblg(void __iomem *regs)
+{
+	/* this driver fills table 0 for this component */
+	jpeg_set_htbl(regs, hactblg0, S5P_JPG_HACTBLG(0), ARRAY_SIZE(hactblg0));
+}
+
+/*
+ * ============================================================================
+ * Device file operations
+ * ============================================================================
+ */
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+		      struct vb2_queue *dst_vq);
+static struct s5p_jpeg_fmt *s5p_jpeg_find_format(unsigned int mode,
+						 __u32 pixelformat);
+
+static int s5p_jpeg_open(struct file *file)
+{
+	struct s5p_jpeg *jpeg = video_drvdata(file);
+	struct video_device *vfd = video_devdata(file);
+	struct s5p_jpeg_ctx *ctx;
+
+	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	file->private_data = ctx;
+	ctx->jpeg = jpeg;
+	if (vfd == jpeg->vfd_encoder)
+		ctx->mode = S5P_JPEG_ENCODE;
+	else
+		ctx->mode = S5P_JPEG_DECODE;
+
+	ctx->m2m_ctx = v4l2_m2m_ctx_init(jpeg->m2m_dev, ctx, queue_init);
+	if (IS_ERR_OR_NULL(ctx->m2m_ctx)) {
+		int err = PTR_ERR(ctx->m2m_ctx);
+		kfree(ctx);
+		return err;
+	}
+
+	ctx->out_q.fmt = s5p_jpeg_find_format(ctx->mode, V4L2_PIX_FMT_RGB565X);
+	ctx->cap_q.fmt = s5p_jpeg_find_format(ctx->mode, V4L2_PIX_FMT_YUYV);
+
+	return 0;
+}
+
+static int s5p_jpeg_release(struct file *file)
+{
+	struct s5p_jpeg_ctx *ctx = file->private_data;
+
+	v4l2_m2m_ctx_release(ctx->m2m_ctx);
+	kfree(ctx);
+
+	return 0;
+}
+
+static unsigned int s5p_jpeg_poll(struct file *file,
+				 struct poll_table_struct *wait)
+{
+	struct s5p_jpeg_ctx *ctx = file->private_data;
+
+	return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
+}
+
+static int s5p_jpeg_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct s5p_jpeg_ctx *ctx = file->private_data;
+
+	return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
+}
+
+static const struct v4l2_file_operations s5p_jpeg_fops = {
+	.owner		= THIS_MODULE,
+	.open		= s5p_jpeg_open,
+	.release	= s5p_jpeg_release,
+	.poll		= s5p_jpeg_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.mmap		= s5p_jpeg_mmap,
+};
+
+/*
+ * ============================================================================
+ * video ioctl operations
+ * ============================================================================
+ */
+
+static int get_byte(struct s5p_jpeg_buffer *buf)
+{
+	if (buf->curr >= buf->size)
+		return -1;
+
+	return ((unsigned char *)buf->data)[buf->curr++];
+}
+
+static int get_word_be(struct s5p_jpeg_buffer *buf, unsigned int *word)
+{
+	unsigned int temp;
+	int byte;
+
+	byte = get_byte(buf);
+	if (byte == -1)
+		return -1;
+	temp = byte << 8;
+	byte = get_byte(buf);
+	if (byte == -1)
+		return -1;
+	*word = (unsigned int)byte | temp;
+	return 0;
+}
+
+static void skip(struct s5p_jpeg_buffer *buf, long len)
+{
+	int c;
+
+	while (len > 0) {
+		c = get_byte(buf);
+		len--;
+	}
+}
+
+static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
+			       unsigned long buffer, unsigned long size)
+{
+	int c, components, notfound;
+	unsigned int height, width, word;
+	long length;
+	struct s5p_jpeg_buffer jpeg_buffer;
+
+	jpeg_buffer.size = size;
+	jpeg_buffer.data = buffer;
+	jpeg_buffer.curr = 0;
+
+	notfound = 1;
+	while (notfound) {
+		c = get_byte(&jpeg_buffer);
+		if (c == -1)
+			break;
+		if (c != 0xff)
+			continue;
+		do
+			c = get_byte(&jpeg_buffer);
+		while (c == 0xff);
+		if (c == -1)
+			break;
+		if (c == 0)
+			continue;
+		length = 0;
+		switch (c) {
+		/* SOF0: baseline JPEG */
+		case SOF0:
+			if (get_word_be(&jpeg_buffer, &word))
+				break;
+
+			c = get_byte(&jpeg_buffer);
+			if (c == -1)
+				break;
+			if (get_word_be(&jpeg_buffer, &height))
+				break;
+			if (get_word_be(&jpeg_buffer, &width))
+				break;
+			components = get_byte(&jpeg_buffer);
+			if (components == -1)
+				break;
+			notfound = 0;
+
+			skip(&jpeg_buffer, components * 3);
+			break;
+
+		/* skip payload-less markers */
+		case SOI:
+		case RST+0:
+		case RST+1:
+		case RST+2:
+		case RST+3:
+		case RST+4:
+		case RST+5:
+		case RST+6:
+		case RST+7:
+		case EOI:
+		case TEM:
+			break;
+
+		/* skip uninteresting payload markers */
+		default:
+			if (get_word_be(&jpeg_buffer, &word))
+				break;
+			length = (long)word - 2;
+			skip(&jpeg_buffer, length);
+			break;
+		}
+	}
+	result->w = width;
+	result->h = height;
+	result->size = components;
+	return !notfound;
+}
+
+static int s5p_jpeg_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_ENCODE) {
+		strlcpy(cap->driver, S5P_JPEG_M2M_NAME " encoder",
+			sizeof(cap->driver));
+		strlcpy(cap->card, S5P_JPEG_M2M_NAME " encoder",
+			sizeof(cap->card));
+	} else {
+		strlcpy(cap->driver, S5P_JPEG_M2M_NAME " decoder",
+			sizeof(cap->driver));
+		strlcpy(cap->card, S5P_JPEG_M2M_NAME " decoder",
+			sizeof(cap->card));
+	}
+	cap->bus_info[0] = 0;
+	cap->capabilities = V4L2_CAP_STREAMING |
+			    V4L2_CAP_VIDEO_CAPTURE |
+			    V4L2_CAP_VIDEO_OUTPUT;
+	return 0;
+}
+
+static int enum_fmt(struct s5p_jpeg_fmt *formats, int n,
+		    struct v4l2_fmtdesc *f, u32 type)
+{
+	int i, num;
+
+	num = 0;
+
+	for (i = 0; i < n; ++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 < n) {
+		/* Format found */
+		struct s5p_jpeg_fmt *fmt = &formats[i];
+		strlcpy(f->description, fmt->name, sizeof(f->description));
+		f->pixelformat = fmt->fourcc;
+		return 0;
+	}
+
+	/* Format not found */
+	return -EINVAL;
+}
+
+static int s5p_jpeg_enum_fmt_vid_cap(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	struct s5p_jpeg_ctx *ctx;
+
+	ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_ENCODE)
+		return enum_fmt(formats_enc, NUM_FORMATS_ENC, f,
+				MEM2MEM_CAPTURE);
+
+	return enum_fmt(formats_dec, NUM_FORMATS_DEC, f, MEM2MEM_CAPTURE);
+}
+
+static int s5p_jpeg_enum_fmt_vid_out(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	struct s5p_jpeg_ctx *ctx;
+
+	ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_ENCODE)
+		return enum_fmt(formats_enc, NUM_FORMATS_ENC, f,
+				MEM2MEM_OUTPUT);
+
+	return enum_fmt(formats_dec, NUM_FORMATS_DEC, f, MEM2MEM_OUTPUT);
+}
+
+static int vidioc_g_fmt(struct s5p_jpeg_ctx *ctx, struct v4l2_format *f)
+{
+	struct vb2_queue *vq;
+	struct s5p_jpeg_q_data *q_data = NULL;
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+
+	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	if (!vq)
+		return -EINVAL;
+
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		q_data = &ctx->out_q;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		if (ctx->mode == S5P_JPEG_DECODE && !ctx->hdr_parsed)
+			return -EINVAL;
+		q_data = &ctx->cap_q;
+		break;
+	default:
+		;
+	}
+	pix->width = q_data->w;
+	pix->height = q_data->h;
+	pix->field = V4L2_FIELD_NONE;
+	pix->pixelformat = q_data->fmt->fourcc;
+	if (q_data->fmt->fourcc != V4L2_PIX_FMT_JPEG)
+		pix->bytesperline = (q_data->w * q_data->fmt->depth) >> 3;
+	else
+		pix->bytesperline = 0;
+	pix->sizeimage = q_data->size;
+
+	return 0;
+}
+
+static int s5p_jpeg_g_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	return vidioc_g_fmt(priv, f);
+}
+
+static int s5p_jpeg_g_fmt_vid_out(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	return vidioc_g_fmt(priv, f);
+}
+
+static struct s5p_jpeg_fmt *s5p_jpeg_find_format(unsigned int mode,
+						 u32 pixelformat)
+{
+	unsigned int k;
+	struct s5p_jpeg_fmt *formats;
+	int n;
+
+	if (mode == S5P_JPEG_ENCODE) {
+		formats = formats_enc;
+		n = NUM_FORMATS_ENC;
+	} else {
+		formats = formats_dec;
+		n = NUM_FORMATS_DEC;
+	}
+
+	for (k = 0; k < n; k++) {
+		struct s5p_jpeg_fmt *fmt = &formats[k];
+		if (fmt->fourcc == pixelformat)
+			return fmt;
+	}
+
+	return NULL;
+
+}
+
+static void jpeg_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
+				   unsigned int walign,
+				   u32 *h, unsigned int hmin, unsigned int hmax,
+				   unsigned int halign)
+{
+	int width, height, w_step, h_step;
+
+	width = *w;
+	height = *h;
+
+	w_step = 1 << walign;
+	h_step = 1 << halign;
+	v4l_bound_align_image(w, wmin, wmax, walign, h, hmin, hmax, halign, 0);
+
+	if (*w < width && (*w + w_step) < wmax)
+		*w += w_step;
+	if (*h < height && (*h + h_step) < hmax)
+		*h += h_step;
+
+}
+
+static int vidioc_try_fmt(struct v4l2_format *f, struct s5p_jpeg_fmt *fmt,
+			  struct s5p_jpeg_ctx *ctx, int q_type)
+{
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+
+	if (pix->field == V4L2_FIELD_ANY)
+		pix->field = V4L2_FIELD_NONE;
+	else if (pix->field != V4L2_FIELD_NONE)
+		return -EINVAL;
+
+	/* V4L2 specification suggests the driver corrects the format struct
+	 * if any of the dimensions is unsupported */
+	if (q_type == MEM2MEM_OUTPUT)
+		jpeg_bound_align_image(&pix->width, S5P_JPEG_MIN_WIDTH,
+				       S5P_JPEG_MAX_WIDTH, 0,
+				       &pix->height, S5P_JPEG_MIN_HEIGHT,
+				       S5P_JPEG_MAX_HEIGHT, 0);
+	else
+		jpeg_bound_align_image(&pix->width, S5P_JPEG_MIN_WIDTH,
+				       S5P_JPEG_MAX_WIDTH, fmt->h_align,
+				       &pix->height, S5P_JPEG_MIN_HEIGHT,
+				       S5P_JPEG_MAX_HEIGHT, fmt->v_align);
+
+	if (fmt->fourcc == V4L2_PIX_FMT_JPEG) {
+		if (pix->sizeimage <= 0)
+			return -EINVAL;
+		pix->bytesperline = 0;
+	} else {
+		pix->bytesperline = (pix->width * fmt->depth) >> 3;
+		pix->sizeimage = pix->height * pix->bytesperline;
+	}
+
+	return 0;
+}
+
+static int s5p_jpeg_try_fmt_vid_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct s5p_jpeg_fmt *fmt;
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	fmt = s5p_jpeg_find_format(ctx->mode, f->fmt.pix.pixelformat);
+	if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
+		v4l2_err(&ctx->jpeg->v4l2_dev,
+			 "Fourcc format (0x%08x) invalid.\n",
+			 f->fmt.pix.pixelformat);
+		return -EINVAL;
+	}
+
+	return vidioc_try_fmt(f, fmt, ctx, MEM2MEM_CAPTURE);
+}
+
+static int s5p_jpeg_try_fmt_vid_out(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct s5p_jpeg_fmt *fmt;
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	fmt = s5p_jpeg_find_format(ctx->mode, f->fmt.pix.pixelformat);
+	if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
+		v4l2_err(&ctx->jpeg->v4l2_dev,
+			 "Fourcc format (0x%08x) invalid.\n",
+			 f->fmt.pix.pixelformat);
+		return -EINVAL;
+	}
+
+	return vidioc_try_fmt(f, fmt, ctx, MEM2MEM_OUTPUT);
+}
+
+static int vidioc_s_fmt(struct s5p_jpeg_ctx *ctx, struct v4l2_format *f)
+{
+	struct vb2_queue *vq;
+	struct s5p_jpeg_q_data *q_data = NULL;
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+
+	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	if (!vq)
+		return -EINVAL;
+
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		q_data = &ctx->out_q;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		q_data = &ctx->cap_q;
+		break;
+	default:
+		;
+	}
+
+	if (vb2_is_busy(vq)) {
+		v4l2_err(&ctx->jpeg->v4l2_dev, "%s queue busy\n", __func__);
+		return -EBUSY;
+	}
+
+	q_data->fmt = s5p_jpeg_find_format(ctx->mode, pix->pixelformat);
+	q_data->w = pix->width;
+	q_data->h = pix->height;
+	if (q_data->fmt->fourcc != V4L2_PIX_FMT_JPEG)
+		q_data->size = q_data->w * q_data->h * q_data->fmt->depth >> 3;
+	else
+		q_data->size = pix->sizeimage;
+
+	return 0;
+}
+
+static int s5p_jpeg_s_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	int ret;
+
+	ret = s5p_jpeg_try_fmt_vid_cap(file, priv, f);
+	if (ret)
+		return ret;
+
+	return vidioc_s_fmt(priv, f);
+}
+
+static int s5p_jpeg_s_fmt_vid_out(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	int ret;
+
+	ret = s5p_jpeg_try_fmt_vid_out(file, priv, f);
+	if (ret)
+		return ret;
+
+	return vidioc_s_fmt(priv, f);
+}
+
+static int s5p_jpeg_reqbufs(struct file *file, void *priv,
+			  struct v4l2_requestbuffers *reqbufs)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
+}
+
+static int s5p_jpeg_querybuf(struct file *file, void *priv,
+			   struct v4l2_buffer *buf)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
+}
+
+static int s5p_jpeg_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int s5p_jpeg_dqbuf(struct file *file, void *priv,
+			  struct v4l2_buffer *buf)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int s5p_jpeg_streamon(struct file *file, void *priv,
+			   enum v4l2_buf_type type)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
+}
+
+static int s5p_jpeg_streamoff(struct file *file, void *priv,
+			    enum v4l2_buf_type type)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+}
+
+int s5p_jpeg_g_selection(struct file *file, void *priv,
+			 struct v4l2_selection *s)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	switch (s->target) {
+	case V4L2_SEL_TGT_COMPOSE_ACTIVE:
+	case V4L2_SEL_TGT_CROP_ACTIVE:
+		s->r.width = ctx->out_q.w;
+		s->r.height = ctx->out_q.h;
+		break;
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+	case V4L2_SEL_TGT_COMPOSE_PADDED:
+		s->r.width = ctx->cap_q.w;
+		s->r.height = ctx->cap_q.w;
+		break;
+	default:
+		return -EINVAL;
+	}
+	s->r.left = 0;
+	s->r.top = 0;
+	return 0;
+}
+
+static int s5p_jpeg_g_jpegcomp(struct file *file, void *priv,
+			       struct v4l2_jpegcompression *compr)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_DECODE)
+		return -ENOTTY;
+
+	memset(compr, 0, sizeof(*compr));
+	compr->quality = ctx->compr_quality;
+
+	return 0;
+}
+
+static int s5p_jpeg_s_jpegcomp(struct file *file, void *priv,
+			       struct v4l2_jpegcompression *compr)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_DECODE)
+		return -ENOTTY;
+
+	if (compr->quality < S5P_JPEG_COMPR_QUAL_BEST)
+		compr->quality = S5P_JPEG_COMPR_QUAL_BEST;
+	else if (compr->quality > S5P_JPEG_COMPR_QUAL_WORST)
+		compr->quality = S5P_JPEG_COMPR_QUAL_WORST;
+
+	ctx->compr_quality = compr->quality;
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops s5p_jpeg_ioctl_ops = {
+	.vidioc_querycap		= s5p_jpeg_querycap,
+
+	.vidioc_enum_fmt_vid_cap	= s5p_jpeg_enum_fmt_vid_cap,
+	.vidioc_enum_fmt_vid_out	= s5p_jpeg_enum_fmt_vid_out,
+
+	.vidioc_g_fmt_vid_cap		= s5p_jpeg_g_fmt_vid_cap,
+	.vidioc_g_fmt_vid_out		= s5p_jpeg_g_fmt_vid_out,
+
+	.vidioc_try_fmt_vid_cap		= s5p_jpeg_try_fmt_vid_cap,
+	.vidioc_try_fmt_vid_out		= s5p_jpeg_try_fmt_vid_out,
+
+	.vidioc_s_fmt_vid_cap		= s5p_jpeg_s_fmt_vid_cap,
+	.vidioc_s_fmt_vid_out		= s5p_jpeg_s_fmt_vid_out,
+
+	.vidioc_reqbufs			= s5p_jpeg_reqbufs,
+	.vidioc_querybuf		= s5p_jpeg_querybuf,
+
+	.vidioc_qbuf			= s5p_jpeg_qbuf,
+	.vidioc_dqbuf			= s5p_jpeg_dqbuf,
+
+	.vidioc_streamon		= s5p_jpeg_streamon,
+	.vidioc_streamoff		= s5p_jpeg_streamoff,
+
+	.vidioc_g_selection		= s5p_jpeg_g_selection,
+
+	.vidioc_g_jpegcomp		= s5p_jpeg_g_jpegcomp,
+	.vidioc_s_jpegcomp		= s5p_jpeg_s_jpegcomp,
+};
+
+/*
+ * ============================================================================
+ * mem2mem callbacks
+ * ============================================================================
+ */
+
+static void s5p_jpeg_device_run(void *priv)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+	struct s5p_jpeg *jpeg = ctx->jpeg;
+	struct vb2_buffer *src_buf, *dst_buf;
+	unsigned long src_addr, dst_addr;
+
+	src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+	dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+	src_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
+	dst_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
+
+	pm_runtime_get_sync(jpeg->dev);
+
+	jpeg_reset(jpeg->regs);
+	jpeg_poweron(jpeg->regs);
+	jpeg_proc_mode(jpeg->regs, ctx->mode);
+	if (ctx->mode == S5P_JPEG_ENCODE) {
+		if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB565X)
+			jpeg_input_raw_mode(jpeg->regs, S5P_JPEG_RAW_IN_565);
+		else
+			jpeg_input_raw_mode(jpeg->regs, S5P_JPEG_RAW_IN_422);
+		if (ctx->cap_q.fmt->fourcc == V4L2_PIX_FMT_YUYV)
+			jpeg_subsampling_mode(jpeg->regs,
+					      S5P_JPEG_SUBSAMPLING_422);
+		else
+			jpeg_subsampling_mode(jpeg->regs,
+					      S5P_JPEG_SUBSAMPLING_420);
+		jpeg_dri(jpeg->regs, 0);
+		jpeg_x(jpeg->regs, ctx->out_q.w);
+		jpeg_y(jpeg->regs, ctx->out_q.h);
+		jpeg_imgadr(jpeg->regs, src_addr);
+		jpeg_jpgadr(jpeg->regs, dst_addr);
+
+		/* ultimately comes from sizeimage from userspace */
+		jpeg_enc_stream_int(jpeg->regs, ctx->cap_q.size);
+
+		/* JPEG RGB to YCbCr conversion matrix */
+		jpeg_coef(jpeg->regs, 1, 1, S5P_JPEG_COEF11);
+		jpeg_coef(jpeg->regs, 1, 2, S5P_JPEG_COEF12);
+		jpeg_coef(jpeg->regs, 1, 3, S5P_JPEG_COEF13);
+		jpeg_coef(jpeg->regs, 2, 1, S5P_JPEG_COEF21);
+		jpeg_coef(jpeg->regs, 2, 2, S5P_JPEG_COEF22);
+		jpeg_coef(jpeg->regs, 2, 3, S5P_JPEG_COEF23);
+		jpeg_coef(jpeg->regs, 3, 1, S5P_JPEG_COEF31);
+		jpeg_coef(jpeg->regs, 3, 2, S5P_JPEG_COEF32);
+		jpeg_coef(jpeg->regs, 3, 3, S5P_JPEG_COEF33);
+
+		/*
+		 * JPEG IP allows storing 4 quantization tables
+		 * We fill table 0 for luma and table 1 for chroma
+		 */
+		jpeg_set_qtbl_lum(jpeg->regs, ctx->compr_quality);
+		jpeg_set_qtbl_chr(jpeg->regs, ctx->compr_quality);
+		/* use table 0 for Y */
+		jpeg_qtbl(jpeg->regs, 1, 0);
+		/* use table 1 for Cb and Cr*/
+		jpeg_qtbl(jpeg->regs, 2, 1);
+		jpeg_qtbl(jpeg->regs, 3, 1);
+
+		/* Y, Cb, Cr use Huffman table 0 */
+		jpeg_htbl_ac(jpeg->regs, 1);
+		jpeg_htbl_dc(jpeg->regs, 1);
+		jpeg_htbl_ac(jpeg->regs, 2);
+		jpeg_htbl_dc(jpeg->regs, 2);
+		jpeg_htbl_ac(jpeg->regs, 3);
+		jpeg_htbl_dc(jpeg->regs, 3);
+	} else {
+		jpeg_rst_int_enable(jpeg->regs, true);
+		jpeg_data_num_int_enable(jpeg->regs, true);
+		jpeg_final_mcu_num_int_enable(jpeg->regs, true);
+		jpeg_outform_raw(jpeg->regs, S5P_JPEG_RAW_OUT_422);
+		jpeg_jpgadr(jpeg->regs, src_addr);
+		jpeg_imgadr(jpeg->regs, dst_addr);
+	}
+	jpeg_start(jpeg->regs);
+}
+
+static int s5p_jpeg_job_ready(void *priv)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+
+	if (ctx->mode == S5P_JPEG_DECODE)
+		return ctx->hdr_parsed;
+	return 1;
+}
+
+static void s5p_jpeg_job_abort(void *priv)
+{
+}
+
+static struct v4l2_m2m_ops s5p_jpeg_m2m_ops = {
+	.device_run	= s5p_jpeg_device_run,
+	.job_ready	= s5p_jpeg_job_ready,
+	.job_abort	= s5p_jpeg_job_abort,
+};
+
+/*
+ * ============================================================================
+ * Queue operations
+ * ============================================================================
+ */
+
+static int s5p_jpeg_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+				unsigned int *nplanes, unsigned int sizes[],
+				void *alloc_ctxs[])
+{
+	struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(vq);
+	struct s5p_jpeg_q_data *q_data = NULL;
+	unsigned int size, count = *nbuffers;
+
+	switch (vq->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		q_data = &ctx->out_q;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		q_data = &ctx->cap_q;
+		break;
+	default:
+		;
+	}
+
+	size = q_data->size;
+
+	/*
+	 * header is parsed during decoding and parsed information stored
+	 * in the context so we do not allow another buffer to overwrite it
+	 */
+	if (ctx->mode == S5P_JPEG_DECODE)
+		count = 1;
+
+	*nbuffers = count;
+	*nplanes = 1;
+	sizes[0] = size;
+	alloc_ctxs[0] = ctx->jpeg->alloc_ctx;
+
+	return 0;
+}
+
+static int s5p_jpeg_buf_prepare(struct vb2_buffer *vb)
+{
+	struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct s5p_jpeg_q_data *q_data = NULL;
+
+	switch (vb->vb2_queue->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		q_data = &ctx->out_q;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		q_data = &ctx->cap_q;
+		break;
+	default:
+		;
+	}
+	if (vb2_plane_size(vb, 0) < q_data->size) {
+		pr_err("%s data will not fit into plane (%lu < %lu)\n",
+				__func__, vb2_plane_size(vb, 0),
+				(long)q_data->size);
+		return -EINVAL;
+	}
+
+	vb2_set_plane_payload(vb, 0, q_data->size);
+
+	return 0;
+}
+
+static void s5p_jpeg_buf_queue(struct vb2_buffer *vb)
+{
+	struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+	if (ctx->mode == S5P_JPEG_DECODE &&
+	    vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+		struct s5p_jpeg_q_data tmp;
+		ctx->hdr_parsed = s5p_jpeg_parse_hdr(&tmp,
+		     (unsigned long)vb2_plane_vaddr(vb, 0),
+		     ctx->out_q.size);
+		if (ctx->hdr_parsed) {
+			struct s5p_jpeg_q_data *q_data;
+
+			q_data = &ctx->out_q;
+			q_data->w = tmp.w;
+			q_data->h = tmp.h;
+
+			q_data = &ctx->cap_q;
+			q_data->w = tmp.w;
+			q_data->h = tmp.h;
+
+			jpeg_bound_align_image(&q_data->w,
+					       S5P_JPEG_MIN_WIDTH,
+					       S5P_JPEG_MAX_WIDTH,
+					       q_data->fmt->h_align,
+					       &q_data->h,
+					       S5P_JPEG_MIN_HEIGHT,
+					       S5P_JPEG_MAX_HEIGHT,
+					       q_data->fmt->v_align);
+			ctx->parsed_w = tmp.w;
+			ctx->parsed_h = tmp.h;
+		}
+	}
+	if (ctx->m2m_ctx)
+		v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
+}
+
+static void s5p_jpeg_wait_prepare(struct vb2_queue *vq)
+{
+	struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(vq);
+
+	mutex_unlock(&ctx->jpeg->lock);
+}
+
+static void s5p_jpeg_wait_finish(struct vb2_queue *vq)
+{
+	struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(vq);
+
+	mutex_lock(&ctx->jpeg->lock);
+}
+
+static struct vb2_ops s5p_jpeg_qops = {
+	.queue_setup	= s5p_jpeg_queue_setup,
+	.buf_prepare	= s5p_jpeg_buf_prepare,
+	.buf_queue	= s5p_jpeg_buf_queue,
+	.wait_prepare	= s5p_jpeg_wait_prepare,
+	.wait_finish	= s5p_jpeg_wait_finish,
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+		      struct vb2_queue *dst_vq)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+	int ret;
+
+	memset(src_vq, 0, sizeof(*src_vq));
+	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	src_vq->drv_priv = ctx;
+	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	src_vq->ops = &s5p_jpeg_qops;
+	src_vq->mem_ops = &vb2_dma_contig_memops;
+
+	ret = vb2_queue_init(src_vq);
+	if (ret)
+		return ret;
+
+	memset(dst_vq, 0, sizeof(*dst_vq));
+	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	dst_vq->drv_priv = ctx;
+	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	dst_vq->ops = &s5p_jpeg_qops;
+	dst_vq->mem_ops = &vb2_dma_contig_memops;
+
+	return vb2_queue_init(dst_vq);
+}
+
+/*
+ * ============================================================================
+ * ISR
+ * ============================================================================
+ */
+
+static irqreturn_t s5p_jpeg_irq(int irq, void *dev_id)
+{
+	struct s5p_jpeg *jpeg = dev_id;
+	struct s5p_jpeg_ctx *curr_ctx;
+	struct vb2_buffer *src_buf, *dst_buf;
+	unsigned long payload_size = 0;
+	enum vb2_buffer_state state = VB2_BUF_STATE_DONE;
+	bool enc_jpeg_too_large = false;
+	bool timer_elapsed = false;
+	bool op_completed = false;
+
+	curr_ctx = v4l2_m2m_get_curr_priv(jpeg->m2m_dev);
+
+	src_buf = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
+	dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
+
+	if (curr_ctx->mode == S5P_JPEG_ENCODE)
+		enc_jpeg_too_large = jpeg_enc_stream_stat(jpeg->regs);
+	timer_elapsed = jpeg_timer_stat(jpeg->regs);
+	op_completed = jpeg_result_stat_ok(jpeg->regs);
+	if (curr_ctx->mode == S5P_JPEG_DECODE)
+		op_completed = op_completed && jpeg_stream_stat_ok(jpeg->regs);
+
+	if (enc_jpeg_too_large) {
+		state = VB2_BUF_STATE_ERROR;
+		jpeg_clear_enc_stream_stat(jpeg->regs);
+	} else if (timer_elapsed) {
+		state = VB2_BUF_STATE_ERROR;
+		jpeg_clear_timer_stat(jpeg->regs);
+	} else if (!op_completed) {
+		state = VB2_BUF_STATE_ERROR;
+	} else {
+		payload_size = jpeg_compressed_size(jpeg->regs);
+	}
+
+	v4l2_m2m_buf_done(src_buf, state);
+	if (curr_ctx->mode == S5P_JPEG_ENCODE)
+		vb2_set_plane_payload(dst_buf, 0, payload_size);
+	v4l2_m2m_buf_done(dst_buf, state);
+	v4l2_m2m_job_finish(jpeg->m2m_dev, curr_ctx->m2m_ctx);
+
+	jpeg_clear_int(jpeg->regs);
+
+	pm_runtime_put(jpeg->dev);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * ============================================================================
+ * Driver basic infrastructure
+ * ============================================================================
+ */
+
+static int s5p_jpeg_probe(struct platform_device *pdev)
+{
+	struct s5p_jpeg *jpeg;
+	struct resource *res;
+	int ret;
+
+	/* JPEG IP abstraction struct */
+	jpeg = kzalloc(sizeof(struct s5p_jpeg), GFP_KERNEL);
+	if (!jpeg) {
+		dev_err(&pdev->dev, "no memory for state\n");
+		return -ENOMEM;
+	}
+	mutex_init(&jpeg->lock);
+	jpeg->dev = &pdev->dev;
+
+	/* memory-mapped registers */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "cannot find IO resource\n");
+		ret = -ENOENT;
+		goto jpeg_alloc_rollback;
+	}
+
+	jpeg->ioarea = request_mem_region(res->start, resource_size(res),
+					  pdev->name);
+	if (!jpeg->ioarea) {
+		dev_err(&pdev->dev, "cannot request IO\n");
+		ret = -ENXIO;
+		goto jpeg_alloc_rollback;
+	}
+
+	jpeg->regs = ioremap(res->start, resource_size(res));
+	if (!jpeg->regs) {
+		dev_err(&pdev->dev, "cannot map IO\n");
+		ret = -ENXIO;
+		goto mem_region_rollback;
+	}
+
+	dev_dbg(&pdev->dev, "registers %p (%p, %p)\n",
+		jpeg->regs, jpeg->ioarea, res);
+
+	/* interrupt service routine registration */
+	jpeg->irq = ret = platform_get_irq(pdev, 0);
+	if (ret <= 0) {
+		dev_err(&pdev->dev, "cannot find IRQ\n");
+		goto ioremap_rollback;
+	}
+
+	ret = request_irq(jpeg->irq, s5p_jpeg_irq, 0,
+			  dev_name(&pdev->dev), jpeg);
+
+	if (ret) {
+		dev_err(&pdev->dev, "cannot claim IRQ %d\n", jpeg->irq);
+		goto ioremap_rollback;
+	}
+
+	/* clocks */
+	jpeg->clk = clk_get(&pdev->dev, "jpeg");
+	if (IS_ERR_OR_NULL(jpeg->clk)) {
+		dev_err(&pdev->dev, "cannot get clock\n");
+		ret = -ENOENT;
+		goto request_irq_rollback;
+	}
+	dev_dbg(&pdev->dev, "clock source %p\n", jpeg->clk);
+	clk_enable(jpeg->clk);
+
+	/* v4l2 device */
+	ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register v4l2 device\n");
+		goto clk_get_rollback;
+	}
+
+	/* JPEG encoder /dev/videoX node */
+	jpeg->vfd_encoder = video_device_alloc();
+	if (!jpeg->vfd_encoder) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to allocate video device\n");
+		ret = -ENOMEM;
+		goto device_register_rollback;
+	}
+	strlcpy(jpeg->vfd_encoder->name, S5P_JPEG_M2M_NAME,
+		sizeof(jpeg->vfd_encoder->name));
+	jpeg->vfd_encoder->fops		= &s5p_jpeg_fops;
+	jpeg->vfd_encoder->ioctl_ops	= &s5p_jpeg_ioctl_ops;
+	jpeg->vfd_encoder->minor	= -1;
+	jpeg->vfd_encoder->release	= video_device_release;
+	jpeg->vfd_encoder->lock		= &jpeg->lock;
+	jpeg->vfd_encoder->v4l2_dev	= &jpeg->v4l2_dev;
+
+	ret = video_register_device(jpeg->vfd_encoder, VFL_TYPE_GRABBER, -1);
+	if (ret) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to register video device\n");
+		goto enc_vdev_alloc_rollback;
+	}
+
+	video_set_drvdata(jpeg->vfd_encoder, jpeg);
+	v4l2_info(&jpeg->v4l2_dev,
+		  "encoder device registered as /dev/video%d\n",
+		  jpeg->vfd_encoder->num);
+
+	/* JPEG decoder /dev/videoX node */
+	jpeg->vfd_decoder = video_device_alloc();
+	if (!jpeg->vfd_decoder) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to allocate video device\n");
+		ret = -ENOMEM;
+		goto enc_vdev_register_rollback;
+	}
+	strlcpy(jpeg->vfd_decoder->name, S5P_JPEG_M2M_NAME,
+		sizeof(jpeg->vfd_decoder->name));
+	jpeg->vfd_decoder->fops		= &s5p_jpeg_fops;
+	jpeg->vfd_decoder->ioctl_ops	= &s5p_jpeg_ioctl_ops;
+	jpeg->vfd_decoder->minor	= -1;
+	jpeg->vfd_decoder->release	= video_device_release;
+	jpeg->vfd_decoder->lock		= &jpeg->lock;
+	jpeg->vfd_decoder->v4l2_dev	= &jpeg->v4l2_dev;
+
+	ret = video_register_device(jpeg->vfd_decoder, VFL_TYPE_GRABBER, -1);
+	if (ret) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to register video device\n");
+		goto dec_vdev_alloc_rollback;
+	}
+
+	video_set_drvdata(jpeg->vfd_decoder, jpeg);
+	v4l2_info(&jpeg->v4l2_dev,
+		  "decoder device registered as /dev/video%d\n",
+		  jpeg->vfd_decoder->num);
+
+	/* mem2mem device */
+	jpeg->m2m_dev = v4l2_m2m_init(&s5p_jpeg_m2m_ops);
+	if (IS_ERR_OR_NULL(jpeg->m2m_dev)) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to init mem2mem device\n");
+		ret = PTR_ERR(jpeg->m2m_dev);
+		goto dec_vdev_register_rollback;
+	}
+
+	jpeg->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+	if (IS_ERR_OR_NULL(jpeg->alloc_ctx)) {
+		v4l2_err(&jpeg->v4l2_dev, "Failed to init memory allocator\n");
+		ret = PTR_ERR(jpeg->alloc_ctx);
+		goto m2m_init_rollback;
+	}
+
+	/* final statements & power management */
+	platform_set_drvdata(pdev, jpeg);
+
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	v4l2_info(&jpeg->v4l2_dev, "Samsung S5P JPEG codec\n");
+
+	return 0;
+
+m2m_init_rollback:
+	v4l2_m2m_release(jpeg->m2m_dev);
+
+dec_vdev_register_rollback:
+	video_unregister_device(jpeg->vfd_decoder);
+
+dec_vdev_alloc_rollback:
+	video_device_release(jpeg->vfd_decoder);
+
+enc_vdev_register_rollback:
+	video_unregister_device(jpeg->vfd_encoder);
+
+enc_vdev_alloc_rollback:
+	video_device_release(jpeg->vfd_encoder);
+
+device_register_rollback:
+	v4l2_device_unregister(&jpeg->v4l2_dev);
+
+clk_get_rollback:
+	clk_disable(jpeg->clk);
+	clk_put(jpeg->clk);
+
+request_irq_rollback:
+	free_irq(jpeg->irq, jpeg);
+
+ioremap_rollback:
+	iounmap(jpeg->regs);
+
+mem_region_rollback:
+	release_resource(jpeg->ioarea);
+	release_mem_region(jpeg->ioarea->start, resource_size(jpeg->ioarea));
+
+jpeg_alloc_rollback:
+	kfree(jpeg);
+	return ret;
+}
+
+static int s5p_jpeg_remove(struct platform_device *pdev)
+{
+	struct s5p_jpeg *jpeg = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(jpeg->dev);
+
+	vb2_dma_contig_cleanup_ctx(jpeg->alloc_ctx);
+	v4l2_m2m_release(jpeg->m2m_dev);
+	video_unregister_device(jpeg->vfd_decoder);
+	video_device_release(jpeg->vfd_decoder);
+	video_unregister_device(jpeg->vfd_encoder);
+	video_device_release(jpeg->vfd_encoder);
+	v4l2_device_unregister(&jpeg->v4l2_dev);
+
+	clk_disable(jpeg->clk);
+	clk_put(jpeg->clk);
+
+	free_irq(jpeg->irq, jpeg);
+
+	iounmap(jpeg->regs);
+
+	release_resource(jpeg->ioarea);
+	release_mem_region(jpeg->ioarea->start, resource_size(jpeg->ioarea));
+	kfree(jpeg);
+
+	return 0;
+}
+
+static int
+s5p_jpeg_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	return 0;
+}
+
+static int s5p_jpeg_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static int s5p_jpeg_runtime_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int s5p_jpeg_runtime_resume(struct device *dev)
+{
+	struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
+	/*
+	 * JPEG IP allows storing two Huffman tables for each component
+	 * We fill table 0 for each component
+	 */
+	jpeg_set_hdctbl(jpeg->regs);
+	jpeg_set_hdctblg(jpeg->regs);
+	jpeg_set_hactbl(jpeg->regs);
+	jpeg_set_hactblg(jpeg->regs);
+	return 0;
+}
+
+static const struct dev_pm_ops s5p_jpeg_pm_ops = {
+	.runtime_suspend = s5p_jpeg_runtime_suspend,
+	.runtime_resume	 = s5p_jpeg_runtime_resume,
+};
+
+static struct platform_driver s5p_jpeg_driver = {
+	.probe = s5p_jpeg_probe,
+	.remove = s5p_jpeg_remove,
+	.suspend = s5p_jpeg_suspend,
+	.resume = s5p_jpeg_resume,
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = S5P_JPEG_M2M_NAME,
+		.pm = &s5p_jpeg_pm_ops,
+	},
+};
+
+static int __init
+s5p_jpeg_register(void)
+{
+	int ret;
+
+	pr_info("S5P JPEG V4L2 Driver, (c) 2011 Samsung Electronics\n");
+
+	ret = platform_driver_register(&s5p_jpeg_driver);
+
+	if (ret) {
+		pr_err("%s: failed to register jpeg driver\n", __func__);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static void __exit
+s5p_jpeg_unregister(void)
+{
+	platform_driver_unregister(&s5p_jpeg_driver);
+}
+
+module_init(s5p_jpeg_register);
+module_exit(s5p_jpeg_unregister);
+
+MODULE_AUTHOR("Andrzej Pietrasiewicz <andrzej.p@samsung.com>");
+MODULE_DESCRIPTION("Samsung JPEG codec driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/media/video/s5p-jpeg/jpeg-core.h b/drivers/media/video/s5p-jpeg/jpeg-core.h
new file mode 100644
index 0000000..a288db8
--- /dev/null
+++ b/drivers/media/video/s5p-jpeg/jpeg-core.h
@@ -0,0 +1,145 @@
+/* linux/drivers/media/video/s5p-jpeg/jpeg-core.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef JPEG_CORE_H_
+#define JPEG_CORE_H_
+
+#include <media/v4l2-device.h>
+
+#define S5P_JPEG_M2M_NAME		"s5p-jpeg"
+
+/* JPEG compression quality setting */
+#define S5P_JPEG_COMPR_QUAL_BEST	0
+#define S5P_JPEG_COMPR_QUAL_WORST	3
+
+/* JPEG RGB to YCbCr conversion matrix coefficients */
+#define S5P_JPEG_COEF11			0x4d
+#define S5P_JPEG_COEF12			0x97
+#define S5P_JPEG_COEF13			0x1e
+#define S5P_JPEG_COEF21			0x2c
+#define S5P_JPEG_COEF22			0x57
+#define S5P_JPEG_COEF23			0x83
+#define S5P_JPEG_COEF31			0x83
+#define S5P_JPEG_COEF32			0x6e
+#define S5P_JPEG_COEF33			0x13
+
+/* a selection of JPEG markers */
+#define TEM				0x01
+#define SOF0				0xc0
+#define RST				0xd0
+#define SOI				0xd8
+#define EOI				0xd9
+#define DHP				0xde
+
+/* Flags that indicate a format can be used for capture/output */
+#define MEM2MEM_CAPTURE			(1 << 0)
+#define MEM2MEM_OUTPUT			(1 << 1)
+
+/**
+ * struct s5p_jpeg - JPEG IP abstraction
+ * @lock:		the mutex protecting this structure
+ * @v4l2_dev:		v4l2 device for mem2mem mode
+ * @vfd_encoder:	video device node for encoder mem2mem mode
+ * @vfd_decoder:	video device node for decoder mem2mem mode
+ * @m2m_dev:		v4l2 mem2mem device data
+ * @ioarea:		JPEG IP memory region
+ * @regs:		JPEG IP registers mapping
+ * @irq:		JPEG IP irq
+ * @clk:		JPEG IP clock
+ * @dev:		JPEG IP struct device
+ * @alloc_ctx:		videobuf2 memory allocator's context
+ */
+struct s5p_jpeg {
+	struct mutex		lock;
+
+	struct v4l2_device	v4l2_dev;
+	struct video_device	*vfd_encoder;
+	struct video_device	*vfd_decoder;
+	struct v4l2_m2m_dev	*m2m_dev;
+
+	struct resource		*ioarea;
+	void __iomem		*regs;
+	unsigned int		irq;
+	struct clk		*clk;
+	struct device		*dev;
+	void			*alloc_ctx;
+};
+
+/**
+ * struct jpeg_fmt - driver's internal color format data
+ * @name:	format descritpion
+ * @fourcc:	the fourcc code, 0 if not applicable
+ * @depth:	number of bits per pixel
+ * @h_align:	horizontal alignment order (align to 2^h_align)
+ * @v_align:	vertical alignment order (align to 2^v_align)
+ * @types:	types of queue this format is applicable to
+ */
+struct s5p_jpeg_fmt {
+	char	*name;
+	u32	fourcc;
+	int	depth;
+	int	h_align;
+	int	v_align;
+	u32	types;
+};
+
+/**
+ * s5p_jpeg_q_data - parameters of one queue
+ * @fmt:	driver-specific format of this queue
+ * @w:		image width
+ * @h:		image height
+ * @size:	image buffer size in bytes
+ */
+struct s5p_jpeg_q_data {
+	struct s5p_jpeg_fmt	*fmt;
+	u32			w;
+	u32			h;
+	u32			size;
+};
+
+/**
+ * s5p_jpeg_ctx - the device context data
+ * @jpeg:		JPEG IP device for this context
+ * @mode:		compression (encode) operation or decompression (decode)
+ * @compr_quality:	compression quality in compression (encode) mode
+ * @m2m_ctx:		mem2mem device context
+ * @out_q:		source (output) queue information
+ * @cap_fmt:		destination (capture) queue queue information
+ * @hdr_parsed:		set if header has been parsed during decompression
+ * parsed_w:		image width parsed during decompression
+ * parsed_h:		image height parsed during decompression
+ */
+struct s5p_jpeg_ctx {
+	struct s5p_jpeg		*jpeg;
+	unsigned int		mode;
+	unsigned int		compr_quality;
+	struct v4l2_m2m_ctx	*m2m_ctx;
+	struct s5p_jpeg_q_data	out_q;
+	struct s5p_jpeg_q_data	cap_q;
+	bool			hdr_parsed;
+	u32			parsed_w;
+	u32			parsed_h;
+};
+
+/**
+ * s5p_jpeg_buffer - description of memory containing input JPEG data
+ * @size:	buffer size
+ * @curr:	current position in the buffer
+ * @data:	pointer to the data
+ */
+struct s5p_jpeg_buffer {
+	unsigned long size;
+	unsigned long curr;
+	unsigned long data;
+};
+
+#endif /* JPEG_CORE_H */
diff --git a/drivers/media/video/s5p-jpeg/jpeg-hw.h b/drivers/media/video/s5p-jpeg/jpeg-hw.h
new file mode 100644
index 0000000..8c1d4d3
--- /dev/null
+++ b/drivers/media/video/s5p-jpeg/jpeg-hw.h
@@ -0,0 +1,353 @@
+/* linux/drivers/media/video/s5p-jpeg/jpeg-hw.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef JPEG_HW_H_
+#define JPEG_HW_H_
+
+#include <linux/io.h>
+
+#include "jpeg-hw.h"
+#include "jpeg-regs.h"
+
+#define S5P_JPEG_MIN_WIDTH		32
+#define S5P_JPEG_MIN_HEIGHT		32
+#define S5P_JPEG_MAX_WIDTH		8192
+#define S5P_JPEG_MAX_HEIGHT		8192
+#define S5P_JPEG_ENCODE			0
+#define S5P_JPEG_DECODE			1
+#define S5P_JPEG_RAW_IN_565		0
+#define S5P_JPEG_RAW_IN_422		1
+#define S5P_JPEG_SUBSAMPLING_422	0
+#define S5P_JPEG_SUBSAMPLING_420	1
+#define S5P_JPEG_RAW_OUT_422		0
+#define S5P_JPEG_RAW_OUT_420		1
+
+static inline void jpeg_reset(void __iomem *regs)
+{
+	unsigned long reg;
+
+	writel(1, regs + S5P_JPG_SW_RESET);
+	reg = readl(regs + S5P_JPG_SW_RESET);
+	/* no other way but polling for when JPEG IP becomes operational */
+	while (reg != 0) {
+		cpu_relax();
+		reg = readl(regs + S5P_JPG_SW_RESET);
+	}
+}
+
+static inline void jpeg_poweron(void __iomem *regs)
+{
+	writel(S5P_POWER_ON, regs + S5P_JPGCLKCON);
+}
+
+static inline void jpeg_input_raw_mode(void __iomem *regs, unsigned long mode)
+{
+	unsigned long reg, m;
+
+	m = S5P_MOD_SEL_565;
+	if (mode == S5P_JPEG_RAW_IN_565)
+		m = S5P_MOD_SEL_565;
+	else if (mode == S5P_JPEG_RAW_IN_422)
+		m = S5P_MOD_SEL_422;
+
+	reg = readl(regs + S5P_JPGCMOD);
+	reg &= ~S5P_MOD_SEL_MASK;
+	reg |= m;
+	writel(reg, regs + S5P_JPGCMOD);
+}
+
+static inline void jpeg_input_raw_y16(void __iomem *regs, bool y16)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGCMOD);
+	if (y16)
+		reg |= S5P_MODE_Y16;
+	else
+		reg &= ~S5P_MODE_Y16_MASK;
+	writel(reg, regs + S5P_JPGCMOD);
+}
+
+static inline void jpeg_proc_mode(void __iomem *regs, unsigned long mode)
+{
+	unsigned long reg, m;
+
+	m = S5P_PROC_MODE_DECOMPR;
+	if (mode == S5P_JPEG_ENCODE)
+		m = S5P_PROC_MODE_COMPR;
+	else
+		m = S5P_PROC_MODE_DECOMPR;
+	reg = readl(regs + S5P_JPGMOD);
+	reg &= ~S5P_PROC_MODE_MASK;
+	reg |= m;
+	writel(reg, regs + S5P_JPGMOD);
+}
+
+static inline void jpeg_subsampling_mode(void __iomem *regs, unsigned long mode)
+{
+	unsigned long reg, m;
+
+	m = S5P_SUBSAMPLING_MODE_422;
+	if (mode == S5P_JPEG_SUBSAMPLING_422)
+		m = S5P_SUBSAMPLING_MODE_422;
+	else if (mode == S5P_JPEG_SUBSAMPLING_420)
+		m = S5P_SUBSAMPLING_MODE_420;
+	reg = readl(regs + S5P_JPGMOD);
+	reg &= ~S5P_SUBSAMPLING_MODE_MASK;
+	reg |= m;
+	writel(reg, regs + S5P_JPGMOD);
+}
+
+static inline void jpeg_dri(void __iomem *regs, unsigned int dri)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGDRI_U);
+	reg &= ~0xff;
+	reg |= (dri >> 8) & 0xff;
+	writel(reg, regs + S5P_JPGDRI_U);
+
+	reg = readl(regs + S5P_JPGDRI_L);
+	reg &= ~0xff;
+	reg |= dri & 0xff;
+	writel(reg, regs + S5P_JPGDRI_L);
+}
+
+static inline void jpeg_qtbl(void __iomem *regs, unsigned int t, unsigned int n)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_QTBL);
+	reg &= ~S5P_QT_NUMt_MASK(t);
+	reg |= (n << S5P_QT_NUMt_SHIFT(t)) & S5P_QT_NUMt_MASK(t);
+	writel(reg, regs + S5P_JPG_QTBL);
+}
+
+static inline void jpeg_htbl_ac(void __iomem *regs, unsigned int t)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_HTBL);
+	reg &= ~S5P_HT_NUMt_AC_MASK(t);
+	/* this driver uses table 0 for all color components */
+	reg |= (0 << S5P_HT_NUMt_AC_SHIFT(t)) & S5P_HT_NUMt_AC_MASK(t);
+	writel(reg, regs + S5P_JPG_HTBL);
+}
+
+static inline void jpeg_htbl_dc(void __iomem *regs, unsigned int t)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_HTBL);
+	reg &= ~S5P_HT_NUMt_DC_MASK(t);
+	/* this driver uses table 0 for all color components */
+	reg |= (0 << S5P_HT_NUMt_DC_SHIFT(t)) & S5P_HT_NUMt_DC_MASK(t);
+	writel(reg, regs + S5P_JPG_HTBL);
+}
+
+static inline void jpeg_y(void __iomem *regs, unsigned int y)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGY_U);
+	reg &= ~0xff;
+	reg |= (y >> 8) & 0xff;
+	writel(reg, regs + S5P_JPGY_U);
+
+	reg = readl(regs + S5P_JPGY_L);
+	reg &= ~0xff;
+	reg |= y & 0xff;
+	writel(reg, regs + S5P_JPGY_L);
+}
+
+static inline void jpeg_x(void __iomem *regs, unsigned int x)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGX_U);
+	reg &= ~0xff;
+	reg |= (x >> 8) & 0xff;
+	writel(reg, regs + S5P_JPGX_U);
+
+	reg = readl(regs + S5P_JPGX_L);
+	reg &= ~0xff;
+	reg |= x & 0xff;
+	writel(reg, regs + S5P_JPGX_L);
+}
+
+static inline void jpeg_rst_int_enable(void __iomem *regs, bool enable)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGINTSE);
+	reg &= ~S5P_RSTm_INT_EN_MASK;
+	if (enable)
+		reg |= S5P_RSTm_INT_EN;
+	writel(reg, regs + S5P_JPGINTSE);
+}
+
+static inline void jpeg_data_num_int_enable(void __iomem *regs, bool enable)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGINTSE);
+	reg &= ~S5P_DATA_NUM_INT_EN_MASK;
+	if (enable)
+		reg |= S5P_DATA_NUM_INT_EN;
+	writel(reg, regs + S5P_JPGINTSE);
+}
+
+static inline void jpeg_final_mcu_num_int_enable(void __iomem *regs, bool enbl)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGINTSE);
+	reg &= ~S5P_FINAL_MCU_NUM_INT_EN_MASK;
+	if (enbl)
+		reg |= S5P_FINAL_MCU_NUM_INT_EN;
+	writel(reg, regs + S5P_JPGINTSE);
+}
+
+static inline void jpeg_timer_enable(void __iomem *regs, unsigned long val)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_TIMER_SE);
+	reg |= S5P_TIMER_INT_EN;
+	reg &= ~S5P_TIMER_INIT_MASK;
+	reg |= val & S5P_TIMER_INIT_MASK;
+	writel(reg, regs + S5P_JPG_TIMER_SE);
+}
+
+static inline void jpeg_timer_disable(void __iomem *regs)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_TIMER_SE);
+	reg &= ~S5P_TIMER_INT_EN_MASK;
+	writel(reg, regs + S5P_JPG_TIMER_SE);
+}
+
+static inline int jpeg_timer_stat(void __iomem *regs)
+{
+	return (int)((readl(regs + S5P_JPG_TIMER_ST) & S5P_TIMER_INT_STAT_MASK)
+		     >> S5P_TIMER_INT_STAT_SHIFT);
+}
+
+static inline void jpeg_clear_timer_stat(void __iomem *regs)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_TIMER_SE);
+	reg &= ~S5P_TIMER_INT_STAT_MASK;
+	writel(reg, regs + S5P_JPG_TIMER_SE);
+}
+
+static inline void jpeg_enc_stream_int(void __iomem *regs, unsigned long size)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_ENC_STREAM_INTSE);
+	reg &= ~S5P_ENC_STREAM_BOUND_MASK;
+	reg |= S5P_ENC_STREAM_INT_EN;
+	reg |= size & S5P_ENC_STREAM_BOUND_MASK;
+	writel(reg, regs + S5P_JPG_ENC_STREAM_INTSE);
+}
+
+static inline int jpeg_enc_stream_stat(void __iomem *regs)
+{
+	return (int)(readl(regs + S5P_JPG_ENC_STREAM_INTST) &
+		     S5P_ENC_STREAM_INT_STAT_MASK);
+}
+
+static inline void jpeg_clear_enc_stream_stat(void __iomem *regs)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_ENC_STREAM_INTSE);
+	reg &= ~S5P_ENC_STREAM_INT_MASK;
+	writel(reg, regs + S5P_JPG_ENC_STREAM_INTSE);
+}
+
+static inline void jpeg_outform_raw(void __iomem *regs, unsigned long format)
+{
+	unsigned long reg, f;
+
+	f = S5P_DEC_OUT_FORMAT_422;
+	if (format == S5P_JPEG_RAW_OUT_422)
+		f = S5P_DEC_OUT_FORMAT_422;
+	else if (format == S5P_JPEG_RAW_OUT_420)
+		f = S5P_DEC_OUT_FORMAT_420;
+	reg = readl(regs + S5P_JPG_OUTFORM);
+	reg &= ~S5P_DEC_OUT_FORMAT_MASK;
+	reg |= f;
+	writel(reg, regs + S5P_JPG_OUTFORM);
+}
+
+static inline void jpeg_jpgadr(void __iomem *regs, unsigned long addr)
+{
+	writel(addr, regs + S5P_JPG_JPGADR);
+}
+
+static inline void jpeg_imgadr(void __iomem *regs, unsigned long addr)
+{
+	writel(addr, regs + S5P_JPG_IMGADR);
+}
+
+static inline void jpeg_coef(void __iomem *regs, unsigned int i,
+			     unsigned int j, unsigned int coef)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPG_COEF(i));
+	reg &= ~S5P_COEFn_MASK(j);
+	reg |= (coef << S5P_COEFn_SHIFT(j)) & S5P_COEFn_MASK(j);
+	writel(reg, regs + S5P_JPG_COEF(i));
+}
+
+static inline void jpeg_start(void __iomem *regs)
+{
+	writel(1, regs + S5P_JSTART);
+}
+
+static inline int jpeg_result_stat_ok(void __iomem *regs)
+{
+	return (int)((readl(regs + S5P_JPGINTST) & S5P_RESULT_STAT_MASK)
+		     >> S5P_RESULT_STAT_SHIFT);
+}
+
+static inline int jpeg_stream_stat_ok(void __iomem *regs)
+{
+	return !(int)((readl(regs + S5P_JPGINTST) & S5P_STREAM_STAT_MASK)
+		      >> S5P_STREAM_STAT_SHIFT);
+}
+
+static inline void jpeg_clear_int(void __iomem *regs)
+{
+	unsigned long reg;
+
+	reg = readl(regs + S5P_JPGINTST);
+	writel(S5P_INT_RELEASE, regs + S5P_JPGCOM);
+	reg = readl(regs + S5P_JPGOPR);
+}
+
+static inline int jpeg_compressed_size(void __iomem *regs)
+{
+	unsigned long jpeg_size = 0;
+
+	jpeg_size |= (readl(regs + S5P_JPGCNT_U) & 0xff) << 16;
+	jpeg_size |= (readl(regs + S5P_JPGCNT_M) & 0xff) << 8;
+	jpeg_size |= (readl(regs + S5P_JPGCNT_L) & 0xff);
+
+	return (int)jpeg_size;
+}
+
+#endif /* JPEG_HW_H_ */
diff --git a/drivers/media/video/s5p-jpeg/jpeg-regs.h b/drivers/media/video/s5p-jpeg/jpeg-regs.h
new file mode 100644
index 0000000..91f4dd5
--- /dev/null
+++ b/drivers/media/video/s5p-jpeg/jpeg-regs.h
@@ -0,0 +1,170 @@
+/* linux/drivers/media/video/s5p-jpeg/jpeg-regs.h
+ *
+ * Register definition file for Samsung JPEG codec driver
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef JPEG_REGS_H_
+#define JPEG_REGS_H_
+
+/* JPEG mode register */
+#define S5P_JPGMOD			0x00
+#define S5P_PROC_MODE_MASK		(0x1 << 3)
+#define S5P_PROC_MODE_DECOMPR		(0x1 << 3)
+#define S5P_PROC_MODE_COMPR		(0x0 << 3)
+#define S5P_SUBSAMPLING_MODE_MASK	0x7
+#define S5P_SUBSAMPLING_MODE_444	(0x0 << 0)
+#define S5P_SUBSAMPLING_MODE_422	(0x1 << 0)
+#define S5P_SUBSAMPLING_MODE_420	(0x2 << 0)
+#define S5P_SUBSAMPLING_MODE_GRAY	(0x3 << 0)
+
+/* JPEG operation status register */
+#define S5P_JPGOPR			0x04
+
+/* Quantization tables*/
+#define S5P_JPG_QTBL			0x08
+#define S5P_QT_NUMt_SHIFT(t)		(((t) - 1) << 1)
+#define S5P_QT_NUMt_MASK(t)		(0x3 << S5P_QT_NUMt_SHIFT(t))
+
+/* Huffman tables */
+#define S5P_JPG_HTBL			0x0c
+#define S5P_HT_NUMt_AC_SHIFT(t)		(((t) << 1) - 1)
+#define S5P_HT_NUMt_AC_MASK(t)		(0x1 << S5P_HT_NUMt_AC_SHIFT(t))
+
+#define S5P_HT_NUMt_DC_SHIFT(t)		(((t) - 1) << 1)
+#define S5P_HT_NUMt_DC_MASK(t)		(0x1 << S5P_HT_NUMt_DC_SHIFT(t))
+
+/* JPEG restart interval register upper byte */
+#define S5P_JPGDRI_U			0x10
+
+/* JPEG restart interval register lower byte */
+#define S5P_JPGDRI_L			0x14
+
+/* JPEG vertical resolution register upper byte */
+#define S5P_JPGY_U			0x18
+
+/* JPEG vertical resolution register lower byte */
+#define S5P_JPGY_L			0x1c
+
+/* JPEG horizontal resolution register upper byte */
+#define S5P_JPGX_U			0x20
+
+/* JPEG horizontal resolution register lower byte */
+#define S5P_JPGX_L			0x24
+
+/* JPEG byte count register upper byte */
+#define S5P_JPGCNT_U			0x28
+
+/* JPEG byte count register middle byte */
+#define S5P_JPGCNT_M			0x2c
+
+/* JPEG byte count register lower byte */
+#define S5P_JPGCNT_L			0x30
+
+/* JPEG interrupt setting register */
+#define S5P_JPGINTSE			0x34
+#define S5P_RSTm_INT_EN_MASK		(0x1 << 7)
+#define S5P_RSTm_INT_EN			(0x1 << 7)
+#define S5P_DATA_NUM_INT_EN_MASK	(0x1 << 6)
+#define S5P_DATA_NUM_INT_EN		(0x1 << 6)
+#define S5P_FINAL_MCU_NUM_INT_EN_MASK	(0x1 << 5)
+#define S5P_FINAL_MCU_NUM_INT_EN	(0x1 << 5)
+
+/* JPEG interrupt status register */
+#define S5P_JPGINTST			0x38
+#define S5P_RESULT_STAT_SHIFT		6
+#define S5P_RESULT_STAT_MASK		(0x1 << S5P_RESULT_STAT_SHIFT)
+#define S5P_STREAM_STAT_SHIFT		5
+#define S5P_STREAM_STAT_MASK		(0x1 << S5P_STREAM_STAT_SHIFT)
+
+/* JPEG command register */
+#define S5P_JPGCOM			0x4c
+#define S5P_INT_RELEASE			(0x1 << 2)
+
+/* Raw image data r/w address register */
+#define S5P_JPG_IMGADR			0x50
+
+/* JPEG file r/w address register */
+#define S5P_JPG_JPGADR			0x58
+
+/* Coefficient for RGB-to-YCbCr converter register */
+#define S5P_JPG_COEF(n)			(0x5c + (((n) - 1) << 2))
+#define S5P_COEFn_SHIFT(j)		((3 - (j)) << 3)
+#define S5P_COEFn_MASK(j)		(0xff << S5P_COEFn_SHIFT(j))
+
+/* JPEG color mode register */
+#define S5P_JPGCMOD			0x68
+#define S5P_MOD_SEL_MASK		(0x7 << 5)
+#define S5P_MOD_SEL_422			(0x1 << 5)
+#define S5P_MOD_SEL_565			(0x2 << 5)
+#define S5P_MODE_Y16_MASK		(0x1 << 1)
+#define S5P_MODE_Y16			(0x1 << 1)
+
+/* JPEG clock control register */
+#define S5P_JPGCLKCON			0x6c
+#define S5P_CLK_DOWN_READY		(0x1 << 1)
+#define S5P_POWER_ON			(0x1 << 0)
+
+/* JPEG start register */
+#define S5P_JSTART			0x70
+
+/* JPEG SW reset register */
+#define S5P_JPG_SW_RESET		0x78
+
+/* JPEG timer setting register */
+#define S5P_JPG_TIMER_SE		0x7c
+#define S5P_TIMER_INT_EN_MASK		(0x1 << 31)
+#define S5P_TIMER_INT_EN		(0x1 << 31)
+#define S5P_TIMER_INIT_MASK		0x7fffffff
+
+/* JPEG timer status register */
+#define S5P_JPG_TIMER_ST		0x80
+#define S5P_TIMER_INT_STAT_SHIFT	31
+#define S5P_TIMER_INT_STAT_MASK		(0x1 << S5P_TIMER_INT_STAT_SHIFT)
+#define S5P_TIMER_CNT_SHIFT		0
+#define S5P_TIMER_CNT_MASK		0x7fffffff
+
+/* JPEG decompression output format register */
+#define S5P_JPG_OUTFORM			0x88
+#define S5P_DEC_OUT_FORMAT_MASK		(0x1 << 0)
+#define S5P_DEC_OUT_FORMAT_422		(0x0 << 0)
+#define S5P_DEC_OUT_FORMAT_420		(0x1 << 0)
+
+/* JPEG version register */
+#define S5P_JPG_VERSION			0x8c
+
+/* JPEG compressed stream size interrupt setting register */
+#define S5P_JPG_ENC_STREAM_INTSE	0x98
+#define S5P_ENC_STREAM_INT_MASK		(0x1 << 24)
+#define S5P_ENC_STREAM_INT_EN		(0x1 << 24)
+#define S5P_ENC_STREAM_BOUND_MASK	0xffffff
+
+/* JPEG compressed stream size interrupt status register */
+#define S5P_JPG_ENC_STREAM_INTST	0x9c
+#define S5P_ENC_STREAM_INT_STAT_MASK	0x1
+
+/* JPEG quantizer table register */
+#define S5P_JPG_QTBL_CONTENT(n)		(0x400 + (n) * 0x100)
+
+/* JPEG DC Huffman table register */
+#define S5P_JPG_HDCTBL(n)		(0x800 + (n) * 0x400)
+
+/* JPEG DC Huffman table register */
+#define S5P_JPG_HDCTBLG(n)		(0x840 + (n) * 0x400)
+
+/* JPEG AC Huffman table register */
+#define S5P_JPG_HACTBL(n)		(0x880 + (n) * 0x400)
+
+/* JPEG AC Huffman table register */
+#define S5P_JPG_HACTBLG(n)		(0x8c0 + (n) * 0x400)
+
+#endif /* JPEG_REGS_H_ */
+
-- 
1.7.0.4



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