V4L/DVB (10094): Add tw9910 driver

This patch adds tw9910 driver that use soc_camera framework.
It was tested on SH Migo-r board and mplayer.

 create mode 100644 drivers/media/video/tw9910.c
 create mode 100644 include/media/tw9910.h

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 948 insertions, 0 deletions

diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index da538d9ca30..9785eeb1ed4 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -755,6 +755,12 @@ config MT9V022_PCA9536_SWITCH
 	  Select this if your MT9V022 camera uses a PCA9536 I2C GPIO
 	  extender to switch between 8 and 10 bit datawidth modes
 
+config SOC_CAMERA_TW9910
+	tristate "tw9910 support"
+	depends on SOC_CAMERA && I2C
+	help
+	  This is a tw9910 video driver
+
 config SOC_CAMERA_PLATFORM
 	tristate "platform camera support"
 	depends on SOC_CAMERA
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 84a2be0cbbe..40c69afcde7 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -140,6 +140,7 @@ obj-$(CONFIG_SOC_CAMERA_MT9M111)	+= mt9m111.o
 obj-$(CONFIG_SOC_CAMERA_MT9V022)	+= mt9v022.o
 obj-$(CONFIG_SOC_CAMERA_OV772X)		+= ov772x.o
 obj-$(CONFIG_SOC_CAMERA_PLATFORM)	+= soc_camera_platform.o
+obj-$(CONFIG_SOC_CAMERA_TW9910)		+= tw9910.o
 
 obj-$(CONFIG_VIDEO_AU0828) += au0828/
 
diff --git a/drivers/media/video/tw9910.c b/drivers/media/video/tw9910.c
new file mode 100644
index 00000000000..75cfde02d02
--- /dev/null
+++ b/drivers/media/video/tw9910.c
@@ -0,0 +1,941 @@
+/*
+ * tw9910 Video Driver
+ *
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ * Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ *
+ * Based on ov772x driver,
+ *
+ * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
+ * Copyright (C) 2008 Magnus Damm
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-common.h>
+#include <media/soc_camera.h>
+#include <media/tw9910.h>
+
+#define GET_ID(val)  ((val & 0xF8) >> 3)
+#define GET_ReV(val) (val & 0x07)
+
+/*
+ * register offset
+ */
+#define ID		0x00 /* Product ID Code Register */
+#define STATUS1		0x01 /* Chip Status Register I */
+#define INFORM		0x02 /* Input Format */
+#define OPFORM		0x03 /* Output Format Control Register */
+#define DLYCTR		0x04 /* Hysteresis and HSYNC Delay Control */
+#define OUTCTR1		0x05 /* Output Control I */
+#define ACNTL1		0x06 /* Analog Control Register 1 */
+#define CROP_HI		0x07 /* Cropping Register, High */
+#define VDELAY_LO	0x08 /* Vertical Delay Register, Low */
+#define VACTIVE_LO	0x09 /* Vertical Active Register, Low */
+#define HDELAY_LO	0x0A /* Horizontal Delay Register, Low */
+#define HACTIVE_LO	0x0B /* Horizontal Active Register, Low */
+#define CNTRL1		0x0C /* Control Register I */
+#define VSCALE_LO	0x0D /* Vertical Scaling Register, Low */
+#define SCALE_HI	0x0E /* Scaling Register, High */
+#define HSCALE_LO	0x0F /* Horizontal Scaling Register, Low */
+#define BRIGHT		0x10 /* BRIGHTNESS Control Register */
+#define CONTRAST	0x11 /* CONTRAST Control Register */
+#define SHARPNESS	0x12 /* SHARPNESS Control Register I */
+#define SAT_U		0x13 /* Chroma (U) Gain Register */
+#define SAT_V		0x14 /* Chroma (V) Gain Register */
+#define HUE		0x15 /* Hue Control Register */
+#define CORING1		0x17
+#define CORING2		0x18 /* Coring and IF compensation */
+#define VBICNTL		0x19 /* VBI Control Register */
+#define ACNTL2		0x1A /* Analog Control 2 */
+#define OUTCTR2		0x1B /* Output Control 2 */
+#define SDT		0x1C /* Standard Selection */
+#define SDTR		0x1D /* Standard Recognition */
+#define TEST		0x1F /* Test Control Register */
+#define CLMPG		0x20 /* Clamping Gain */
+#define IAGC		0x21 /* Individual AGC Gain */
+#define AGCGAIN		0x22 /* AGC Gain */
+#define PEAKWT		0x23 /* White Peak Threshold */
+#define CLMPL		0x24 /* Clamp level */
+#define SYNCT		0x25 /* Sync Amplitude */
+#define MISSCNT		0x26 /* Sync Miss Count Register */
+#define PCLAMP		0x27 /* Clamp Position Register */
+#define VCNTL1		0x28 /* Vertical Control I */
+#define VCNTL2		0x29 /* Vertical Control II */
+#define CKILL		0x2A /* Color Killer Level Control */
+#define COMB		0x2B /* Comb Filter Control */
+#define LDLY		0x2C /* Luma Delay and H Filter Control */
+#define MISC1		0x2D /* Miscellaneous Control I */
+#define LOOP		0x2E /* LOOP Control Register */
+#define MISC2		0x2F /* Miscellaneous Control II */
+#define MVSN		0x30 /* Macrovision Detection */
+#define STATUS2		0x31 /* Chip STATUS II */
+#define HFREF		0x32 /* H monitor */
+#define CLMD		0x33 /* CLAMP MODE */
+#define IDCNTL		0x34 /* ID Detection Control */
+#define CLCNTL1		0x35 /* Clamp Control I */
+#define ANAPLLCTL	0x4C
+#define VBIMIN		0x4D
+#define HSLOWCTL	0x4E
+#define WSS3		0x4F
+#define FILLDATA	0x50
+#define SDID		0x51
+#define DID		0x52
+#define WSS1		0x53
+#define WSS2		0x54
+#define VVBI		0x55
+#define LCTL6		0x56
+#define LCTL7		0x57
+#define LCTL8		0x58
+#define LCTL9		0x59
+#define LCTL10		0x5A
+#define LCTL11		0x5B
+#define LCTL12		0x5C
+#define LCTL13		0x5D
+#define LCTL14		0x5E
+#define LCTL15		0x5F
+#define LCTL16		0x60
+#define LCTL17		0x61
+#define LCTL18		0x62
+#define LCTL19		0x63
+#define LCTL20		0x64
+#define LCTL21		0x65
+#define LCTL22		0x66
+#define LCTL23		0x67
+#define LCTL24		0x68
+#define LCTL25		0x69
+#define LCTL26		0x6A
+#define HSGEGIN		0x6B
+#define HSEND		0x6C
+#define OVSDLY		0x6D
+#define OVSEND		0x6E
+#define VBIDELAY	0x6F
+
+/*
+ * register detail
+ */
+
+/* INFORM */
+#define FC27_ON     0x40 /* 1 : Input crystal clock frequency is 27MHz */
+#define FC27_FF     0x00 /* 0 : Square pixel mode. */
+			 /*     Must use 24.54MHz for 60Hz field rate */
+			 /*     source or 29.5MHz for 50Hz field rate */
+#define IFSEL_S     0x10 /* 01 : S-video decoding */
+#define IFSEL_C     0x00 /* 00 : Composite video decoding */
+			 /* Y input video selection */
+#define YSEL_M0     0x00 /*  00 : Mux0 selected */
+#define YSEL_M1     0x04 /*  01 : Mux1 selected */
+#define YSEL_M2     0x08 /*  10 : Mux2 selected */
+#define YSEL_M3     0x10 /*  11 : Mux3 selected */
+
+/* OPFORM */
+#define MODE        0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
+			 /* 1 : ITU-R-656 compatible data sequence format */
+#define LEN         0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
+			 /* 1 : 16-bit YCrCb 4:2:2 output format.*/
+#define LLCMODE     0x20 /* 1 : LLC output mode. */
+			 /* 0 : free-run output mode */
+#define AINC        0x10 /* Serial interface auto-indexing control */
+			 /* 0 : auto-increment */
+			 /* 1 : non-auto */
+#define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */
+			 /* 0 : Vertical out ctrl by HACTIVE and DVALID */
+#define OEN         0x04 /* Output Enable together with TRI_SEL. */
+
+/* OUTCTR1 */
+#define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
+#define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
+			 /* VS pin output control */
+#define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
+#define VSSL_VACT   0x10 /*   1 : VACT   */
+#define VSSL_FIELD  0x20 /*   2 : FIELD  */
+#define VSSL_VVALID 0x30 /*   3 : VVALID */
+#define VSSL_ZERO   0x70 /*   7 : 0      */
+#define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
+#define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
+			 /* HS pin output control */
+#define HSSL_HACT   0x00 /*   0 : HACT   */
+#define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
+#define HSSL_DVALID 0x02 /*   2 : DVALID */
+#define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
+#define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
+#define HSSL_ZERO   0x07 /*   7 : 0      */
+
+/* ACNTL1 */
+#define SRESET      0x80 /* resets the device to its default state
+			  * but all register content remain unchanged.
+			  * This bit is self-resetting.
+			  */
+
+/* VBICNTL */
+/* RTSEL : control the real time signal
+*          output from the MPOUT pin
+*/
+#define RTSEL_MASK  0x07
+#define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
+#define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
+#define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
+#define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
+#define RTSEL_MONO  0x04 /* 0100 = MONO */
+#define RTSEL_DET50 0x05 /* 0101 = DET50 */
+#define RTSEL_FIELD 0x06 /* 0110 = FIELD */
+#define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
+
+/*
+ * structure
+ */
+
+struct regval_list {
+	unsigned char reg_num;
+	unsigned char value;
+};
+
+struct tw9910_scale_ctrl {
+	char           *name;
+	unsigned short  width;
+	unsigned short  height;
+	u16             hscale;
+	u16             vscale;
+};
+
+struct tw9910_cropping_ctrl {
+	u16 vdelay;
+	u16 vactive;
+	u16 hdelay;
+	u16 hactive;
+};
+
+struct tw9910_hsync_ctrl {
+	u16 start;
+	u16 end;
+};
+
+struct tw9910_priv {
+	struct tw9910_video_info       *info;
+	struct i2c_client              *client;
+	struct soc_camera_device        icd;
+	const struct tw9910_scale_ctrl *scale;
+};
+
+/*
+ * register settings
+ */
+
+#define ENDMARKER { 0xff, 0xff }
+
+static const struct regval_list tw9910_default_regs[] =
+{
+	{ OPFORM,  0x00 },
+	{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
+	ENDMARKER,
+};
+
+static const struct soc_camera_data_format tw9910_color_fmt[] = {
+	{
+		.name       = "VYUY",
+		.fourcc     = V4L2_PIX_FMT_VYUY,
+		.depth      = 16,
+		.colorspace = V4L2_COLORSPACE_SMPTE170M,
+	}
+};
+
+static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
+	{
+		.name   = "NTSC SQ",
+		.width  = 640,
+		.height = 480,
+		.hscale = 0x0100,
+		.vscale = 0x0100,
+	},
+	{
+		.name   = "NTSC CCIR601",
+		.width  = 720,
+		.height = 480,
+		.hscale = 0x0100,
+		.vscale = 0x0100,
+	},
+	{
+		.name   = "NTSC SQ (CIF)",
+		.width  = 320,
+		.height = 240,
+		.hscale = 0x0200,
+		.vscale = 0x0200,
+	},
+	{
+		.name   = "NTSC CCIR601 (CIF)",
+		.width  = 360,
+		.height = 240,
+		.hscale = 0x0200,
+		.vscale = 0x0200,
+	},
+	{
+		.name   = "NTSC SQ (QCIF)",
+		.width  = 160,
+		.height = 120,
+		.hscale = 0x0400,
+		.vscale = 0x0400,
+	},
+	{
+		.name   = "NTSC CCIR601 (QCIF)",
+		.width  = 180,
+		.height = 120,
+		.hscale = 0x0400,
+		.vscale = 0x0400,
+	},
+};
+
+static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
+	{
+		.name   = "PAL SQ",
+		.width  = 768,
+		.height = 576,
+		.hscale = 0x0100,
+		.vscale = 0x0100,
+	},
+	{
+		.name   = "PAL CCIR601",
+		.width  = 720,
+		.height = 576,
+		.hscale = 0x0100,
+		.vscale = 0x0100,
+	},
+	{
+		.name   = "PAL SQ (CIF)",
+		.width  = 384,
+		.height = 288,
+		.hscale = 0x0200,
+		.vscale = 0x0200,
+	},
+	{
+		.name   = "PAL CCIR601 (CIF)",
+		.width  = 360,
+		.height = 288,
+		.hscale = 0x0200,
+		.vscale = 0x0200,
+	},
+	{
+		.name   = "PAL SQ (QCIF)",
+		.width  = 192,
+		.height = 144,
+		.hscale = 0x0400,
+		.vscale = 0x0400,
+	},
+	{
+		.name   = "PAL CCIR601 (QCIF)",
+		.width  = 180,
+		.height = 144,
+		.hscale = 0x0400,
+		.vscale = 0x0400,
+	},
+};
+
+static const struct tw9910_cropping_ctrl tw9910_cropping_ctrl = {
+	.vdelay  = 0x0012,
+	.vactive = 0x00F0,
+	.hdelay  = 0x0010,
+	.hactive = 0x02D0,
+};
+
+static const struct tw9910_hsync_ctrl tw9910_hsync_ctrl = {
+	.start = 0x0260,
+	.end   = 0x0300,
+};
+
+/*
+ * general function
+ */
+static int tw9910_set_scale(struct i2c_client *client,
+			    const struct tw9910_scale_ctrl *scale)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, SCALE_HI,
+					(scale->vscale & 0x0F00) >> 4 |
+					(scale->hscale & 0x0F00) >> 8);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
+					scale->hscale & 0x00FF);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
+					scale->vscale & 0x00FF);
+
+	return ret;
+}
+
+static int tw9910_set_cropping(struct i2c_client *client,
+			       const struct tw9910_cropping_ctrl *cropping)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, CROP_HI,
+					(cropping->vdelay  & 0x0300) >> 2 |
+					(cropping->vactive & 0x0300) >> 4 |
+					(cropping->hdelay  & 0x0300) >> 6 |
+					(cropping->hactive & 0x0300) >> 8);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
+					cropping->vdelay & 0x00FF);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
+					cropping->vactive & 0x00FF);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, HDELAY_LO,
+					cropping->hdelay & 0x00FF);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, HACTIVE_LO,
+					cropping->hactive & 0x00FF);
+
+	return ret;
+}
+
+static int tw9910_set_hsync(struct i2c_client *client,
+			    const struct tw9910_hsync_ctrl *hsync)
+{
+	int ret;
+
+	/* bit 10 - 3 */
+	ret = i2c_smbus_write_byte_data(client, HSGEGIN,
+					(hsync->start & 0x07F8) >> 3);
+	if (ret < 0)
+		return ret;
+
+	/* bit 10 - 3 */
+	ret = i2c_smbus_write_byte_data(client, HSEND,
+					(hsync->end & 0x07F8) >> 3);
+	if (ret < 0)
+		return ret;
+
+	/* bit 2 - 0 */
+	ret = i2c_smbus_read_byte_data(client, HSLOWCTL);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, HSLOWCTL,
+					(ret & 0x88)                 |
+					(hsync->start & 0x0007) << 4 |
+					(hsync->end   & 0x0007));
+
+	return ret;
+}
+
+static int tw9910_write_array(struct i2c_client *client,
+			      const struct regval_list *vals)
+{
+	while (vals->reg_num != 0xff) {
+		int ret = i2c_smbus_write_byte_data(client,
+						    vals->reg_num,
+						    vals->value);
+		if (ret < 0)
+			return ret;
+		vals++;
+	}
+	return 0;
+}
+
+static int tw9910_mask_set(struct i2c_client *client, u8 command,
+			   u8 mask, u8 set)
+{
+	s32 val = i2c_smbus_read_byte_data(client, command);
+
+	val &= ~mask;
+	val |=  set;
+
+	return i2c_smbus_write_byte_data(client, command, val);
+}
+
+static void tw9910_reset(struct i2c_client *client)
+{
+	i2c_smbus_write_byte_data(client, ACNTL1, SRESET);
+	msleep(1);
+}
+
+static const struct tw9910_scale_ctrl*
+tw9910_select_norm(struct soc_camera_device *icd, u32 width, u32 height)
+{
+	const struct tw9910_scale_ctrl *scale;
+	const struct tw9910_scale_ctrl *ret = NULL;
+	v4l2_std_id norm = icd->vdev->current_norm;
+	__u32 diff = 0xffffffff, tmp;
+	int size, i;
+
+	if (norm & V4L2_STD_NTSC) {
+		scale = tw9910_ntsc_scales;
+		size = ARRAY_SIZE(tw9910_ntsc_scales);
+	} else if (norm & V4L2_STD_PAL) {
+		scale = tw9910_pal_scales;
+		size = ARRAY_SIZE(tw9910_pal_scales);
+	} else {
+		return NULL;
+	}
+
+	for (i = 0; i < size; i++) {
+		tmp = abs(width - scale[i].width) +
+			abs(height - scale[i].height);
+		if (tmp < diff) {
+			diff = tmp;
+			ret = scale + i;
+		}
+	}
+
+	return ret;
+}
+
+/*
+ * soc_camera_ops function
+ */
+static int tw9910_init(struct soc_camera_device *icd)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	int ret = 0;
+
+	if (priv->info->link.power) {
+		ret = priv->info->link.power(&priv->client->dev, 1);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (priv->info->link.reset)
+		ret = priv->info->link.reset(&priv->client->dev);
+
+	return ret;
+}
+
+static int tw9910_release(struct soc_camera_device *icd)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	int ret = 0;
+
+	if (priv->info->link.power)
+		ret = priv->info->link.power(&priv->client->dev, 0);
+
+	return ret;
+}
+
+static int tw9910_start_capture(struct soc_camera_device *icd)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+
+	if (!priv->scale) {
+		dev_err(&icd->dev, "norm select error\n");
+		return -EPERM;
+	}
+
+	dev_dbg(&icd->dev, "%s %dx%d\n",
+		 priv->scale->name,
+		 priv->scale->width,
+		 priv->scale->height);
+
+	return 0;
+}
+
+static int tw9910_stop_capture(struct soc_camera_device *icd)
+{
+	return 0;
+}
+
+static int tw9910_set_bus_param(struct soc_camera_device *icd,
+				unsigned long flags)
+{
+	return 0;
+}
+
+static unsigned long tw9910_query_bus_param(struct soc_camera_device *icd)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	struct soc_camera_link *icl = priv->client->dev.platform_data;
+	unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
+		SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
+		SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
+
+	return soc_camera_apply_sensor_flags(icl, flags);
+}
+
+static int tw9910_get_chip_id(struct soc_camera_device *icd,
+			      struct v4l2_chip_ident *id)
+{
+	id->ident = V4L2_IDENT_TW9910;
+	id->revision = 0;
+
+	return 0;
+}
+
+static int tw9910_set_std(struct soc_camera_device *icd,
+			  v4l2_std_id *a)
+{
+	int ret = -EINVAL;
+
+	if (*a & (V4L2_STD_NTSC | V4L2_STD_PAL))
+		ret = 0;
+
+	return ret;
+}
+
+static int tw9910_enum_input(struct soc_camera_device *icd,
+			     struct v4l2_input *inp)
+{
+	inp->type = V4L2_INPUT_TYPE_TUNER;
+	inp->std  = V4L2_STD_UNKNOWN;
+	strcpy(inp->name, "Video");
+
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int tw9910_get_register(struct soc_camera_device *icd,
+			       struct v4l2_register *reg)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	int ret;
+
+	if (reg->reg > 0xff)
+		return -EINVAL;
+
+	ret = i2c_smbus_read_byte_data(priv->client, reg->reg);
+	if (ret < 0)
+		return ret;
+
+	/* ret      = int
+	 * reg->val = __u64
+	 */
+	reg->val = (__u64)ret;
+
+	return 0;
+}
+
+static int tw9910_set_register(struct soc_camera_device *icd,
+			       struct v4l2_register *reg)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+
+	if (reg->reg > 0xff ||
+	    reg->val > 0xff)
+		return -EINVAL;
+
+	return i2c_smbus_write_byte_data(priv->client, reg->reg, reg->val);
+}
+#endif
+
+static int tw9910_set_fmt(struct soc_camera_device *icd, __u32 pixfmt,
+			      struct v4l2_rect *rect)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	int                 ret  = -EINVAL;
+	u8                  val;
+
+	/*
+	 * select suitable norm
+	 */
+	priv->scale = tw9910_select_norm(icd, rect->width, rect->height);
+	if (!priv->scale)
+		return ret;
+
+	/*
+	 * reset hardware
+	 */
+	tw9910_reset(priv->client);
+	ret = tw9910_write_array(priv->client, tw9910_default_regs);
+	if (ret < 0)
+		return ret;
+	/*
+	 * set bus width
+	 */
+	val = 0x00;
+	if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
+		val = LEN;
+
+	ret = tw9910_mask_set(priv->client, OPFORM, LEN, val);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * select MPOUT behavior
+	 */
+	switch (priv->info->mpout) {
+	case TW9910_MPO_VLOSS:
+		val = RTSEL_VLOSS; break;
+	case TW9910_MPO_HLOCK:
+		val = RTSEL_HLOCK; break;
+	case TW9910_MPO_SLOCK:
+		val = RTSEL_SLOCK; break;
+	case TW9910_MPO_VLOCK:
+		val = RTSEL_VLOCK; break;
+	case TW9910_MPO_MONO:
+		val = RTSEL_MONO;  break;
+	case TW9910_MPO_DET50:
+		val = RTSEL_DET50; break;
+	case TW9910_MPO_FIELD:
+		val = RTSEL_FIELD; break;
+	case TW9910_MPO_RTCO:
+		val = RTSEL_RTCO;  break;
+	default:
+		val = 0;
+	}
+
+	ret = tw9910_mask_set(priv->client, VBICNTL, RTSEL_MASK, val);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * set scale
+	 */
+	ret = tw9910_set_scale(priv->client, priv->scale);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * set cropping
+	 */
+	ret = tw9910_set_cropping(priv->client, &tw9910_cropping_ctrl);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * set hsync
+	 */
+	ret = tw9910_set_hsync(priv->client, &tw9910_hsync_ctrl);
+
+	return ret;
+}
+
+static int tw9910_try_fmt(struct soc_camera_device *icd,
+			      struct v4l2_format *f)
+{
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+	const struct tw9910_scale_ctrl *scale;
+
+	if (V4L2_FIELD_ANY == pix->field) {
+		pix->field = V4L2_FIELD_INTERLACED;
+	} else if (V4L2_FIELD_INTERLACED != pix->field) {
+		dev_err(&icd->dev, "Field type invalid.\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * select suitable norm
+	 */
+	scale = tw9910_select_norm(icd, pix->width, pix->height);
+	if (!scale)
+		return -EINVAL;
+
+	pix->width  = scale->width;
+	pix->height = scale->height;
+
+	return 0;
+}
+
+static int tw9910_video_probe(struct soc_camera_device *icd)
+{
+	struct tw9910_priv *priv = container_of(icd, struct tw9910_priv, icd);
+	s32 val;
+	int ret;
+
+	/*
+	 * We must have a parent by now. And it cannot be a wrong one.
+	 * So this entire test is completely redundant.
+	 */
+	if (!icd->dev.parent ||
+	    to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
+		return -ENODEV;
+
+	/*
+	 * tw9910 only use 8 or 16 bit bus width
+	 */
+	if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
+	    SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
+		dev_err(&icd->dev, "bus width error\n");
+		return -ENODEV;
+	}
+
+	icd->formats     = tw9910_color_fmt;
+	icd->num_formats = ARRAY_SIZE(tw9910_color_fmt);
+
+	/*
+	 * check and show Product ID
+	 */
+	val = i2c_smbus_read_byte_data(priv->client, ID);
+	if (0x0B != GET_ID(val) ||
+	    0x00 != GET_ReV(val)) {
+		dev_err(&icd->dev,
+			"Product ID error %x:%x\n", GET_ID(val), GET_ReV(val));
+		return -ENODEV;
+	}
+
+	dev_info(&icd->dev,
+		 "tw9910 Product ID %0x:%0x\n", GET_ID(val), GET_ReV(val));
+
+	ret = soc_camera_video_start(icd);
+	if (ret < 0)
+		return ret;
+
+	icd->vdev->tvnorms      = V4L2_STD_NTSC | V4L2_STD_PAL;
+	icd->vdev->current_norm = V4L2_STD_NTSC;
+
+	return ret;
+}
+
+static void tw9910_video_remove(struct soc_camera_device *icd)
+{
+	soc_camera_video_stop(icd);
+}
+
+static struct soc_camera_ops tw9910_ops = {
+	.owner			= THIS_MODULE,
+	.probe			= tw9910_video_probe,
+	.remove			= tw9910_video_remove,
+	.init			= tw9910_init,
+	.release		= tw9910_release,
+	.start_capture		= tw9910_start_capture,
+	.stop_capture		= tw9910_stop_capture,
+	.set_fmt		= tw9910_set_fmt,
+	.try_fmt		= tw9910_try_fmt,
+	.set_bus_param		= tw9910_set_bus_param,
+	.query_bus_param	= tw9910_query_bus_param,
+	.get_chip_id		= tw9910_get_chip_id,
+	.set_std		= tw9910_set_std,
+	.enum_input		= tw9910_enum_input,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.get_register		= tw9910_get_register,
+	.set_register		= tw9910_set_register,
+#endif
+};
+
+/*
+ * i2c_driver function
+ */
+
+static int tw9910_probe(struct i2c_client *client,
+			const struct i2c_device_id *did)
+
+{
+	struct tw9910_priv             *priv;
+	struct tw9910_video_info       *info;
+	struct soc_camera_device       *icd;
+	const struct tw9910_scale_ctrl *scale;
+	int                             i, ret;
+
+	info = client->dev.platform_data;
+	if (!info)
+		return -EINVAL;
+
+	if (!i2c_check_functionality(to_i2c_adapter(client->dev.parent),
+				     I2C_FUNC_SMBUS_BYTE_DATA)) {
+		dev_err(&client->dev,
+			"I2C-Adapter doesn't support "
+			"I2C_FUNC_SMBUS_BYTE_DATA\n");
+		return -EIO;
+	}
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->info   = info;
+	priv->client = client;
+	i2c_set_clientdata(client, priv);
+
+	icd          = &priv->icd;
+	icd->ops     = &tw9910_ops;
+	icd->control = &client->dev;
+	icd->iface   = info->link.bus_id;
+
+	/*
+	 * set width and height
+	 */
+	icd->width_max  = tw9910_ntsc_scales[0].width; /* set default */
+	icd->width_min  = tw9910_ntsc_scales[0].width;
+	icd->height_max = tw9910_ntsc_scales[0].height;
+	icd->height_min = tw9910_ntsc_scales[0].height;
+
+	scale = tw9910_ntsc_scales;
+	for (i = 0; i < ARRAY_SIZE(tw9910_ntsc_scales); i++) {
+		icd->width_max  = max(scale[i].width,  icd->width_max);
+		icd->width_min  = min(scale[i].width,  icd->width_min);
+		icd->height_max = max(scale[i].height, icd->height_max);
+		icd->height_min = min(scale[i].height, icd->height_min);
+	}
+	scale = tw9910_pal_scales;
+	for (i = 0; i < ARRAY_SIZE(tw9910_pal_scales); i++) {
+		icd->width_max  = max(scale[i].width,  icd->width_max);
+		icd->width_min  = min(scale[i].width,  icd->width_min);
+		icd->height_max = max(scale[i].height, icd->height_max);
+		icd->height_min = min(scale[i].height, icd->height_min);
+	}
+
+	ret = soc_camera_device_register(icd);
+
+	if (ret) {
+		i2c_set_clientdata(client, NULL);
+		kfree(priv);
+	}
+
+	return ret;
+}
+
+static int tw9910_remove(struct i2c_client *client)
+{
+	struct tw9910_priv *priv = i2c_get_clientdata(client);
+
+	soc_camera_device_unregister(&priv->icd);
+	i2c_set_clientdata(client, NULL);
+	kfree(priv);
+	return 0;
+}
+
+static const struct i2c_device_id tw9910_id[] = {
+	{ "tw9910", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tw9910_id);
+
+static struct i2c_driver tw9910_i2c_driver = {
+	.driver = {
+		.name = "tw9910",
+	},
+	.probe    = tw9910_probe,
+	.remove   = tw9910_remove,
+	.id_table = tw9910_id,
+};
+
+/*
+ * module function
+ */
+static int __init tw9910_module_init(void)
+{
+	return i2c_add_driver(&tw9910_i2c_driver);
+}
+
+static void __exit tw9910_module_exit(void)
+{
+	i2c_del_driver(&tw9910_i2c_driver);
+}
+
+module_init(tw9910_module_init);
+module_exit(tw9910_module_exit);
+
+MODULE_DESCRIPTION("SoC Camera driver for tw9910");
+MODULE_AUTHOR("Kuninori Morimoto");
+MODULE_LICENSE("GPL v2");