[media] Add v4l2 subdev driver for NOON010PC30L image sensor

Add I2C/V4L2 subdev driver for Siliconfile NOON010PC30 CIF camera.
The driver implements basic functionality, i.e. CIF/QCIF/QQCIF
resolution and color format selection, automatic/manual color
balance control. Other functions like cropping, rotation/flip,
exposure etc. can be easily implemented if needed.
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -740,6 +740,12 @@ config VIDEO_VIA_CAMERA
 	   Chrome9 chipsets.  Currently only tested on OLPC xo-1.5 systems
 	   with ov7670 sensors.
 
+config VIDEO_NOON010PC30
+	tristate "NOON010PC30 CIF camera sensor support"
+	depends on I2C && VIDEO_V4L2
+	---help---
+	  This driver supports NOON010PC30 CIF camera from Siliconfile
+
 config SOC_CAMERA
 	tristate "SoC camera support"
 	depends on VIDEO_V4L2 && HAS_DMA && I2C

drivers/media/video/Makefile

@@ -67,6 +67,7 @@ obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o
 obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o
 obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o
 obj-$(CONFIG_VIDEO_SR030PC30)	+= sr030pc30.o
+obj-$(CONFIG_VIDEO_NOON010PC30)	+= noon010pc30.o
 
 obj-$(CONFIG_SOC_CAMERA_IMX074)		+= imx074.o
 obj-$(CONFIG_SOC_CAMERA_MT9M001)	+= mt9m001.o

drivers/media/video/noon010pc30.c

+/*
+ * Driver for SiliconFile NOON010PC30 CIF (1/11") Image Sensor with ISP
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
+ *
+ * Initial register configuration based on a driver authored by
+ * HeungJun Kim <riverful.kim@samsung.com>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later vergsion.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <media/noon010pc30.h>
+#include <media/v4l2-chip-ident.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mediabus.h>
+#include <media/v4l2-subdev.h>
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Enable module debug trace. Set to 1 to enable.");
+
+#define MODULE_NAME		"NOON010PC30"
+
+/*
+ * Register offsets within a page
+ * b15..b8 - page id, b7..b0 - register address
+ */
+#define POWER_CTRL_REG		0x0001
+#define PAGEMODE_REG		0x03
+#define DEVICE_ID_REG		0x0004
+#define NOON010PC30_ID		0x86
+#define VDO_CTL_REG(n)		(0x0010 + (n))
+#define SYNC_CTL_REG		0x0012
+/* Window size and position */
+#define WIN_ROWH_REG		0x0013
+#define WIN_ROWL_REG		0x0014
+#define WIN_COLH_REG		0x0015
+#define WIN_COLL_REG		0x0016
+#define WIN_HEIGHTH_REG		0x0017
+#define WIN_HEIGHTL_REG		0x0018
+#define WIN_WIDTHH_REG		0x0019
+#define WIN_WIDTHL_REG		0x001A
+#define HBLANKH_REG		0x001B
+#define HBLANKL_REG		0x001C
+#define VSYNCH_REG		0x001D
+#define VSYNCL_REG		0x001E
+/* VSYNC control */
+#define VS_CTL_REG(n)		(0x00A1 + (n))
+/* page 1 */
+#define ISP_CTL_REG(n)		(0x0110 + (n))
+#define YOFS_REG		0x0119
+#define DARK_YOFS_REG		0x011A
+#define SAT_CTL_REG		0x0120
+#define BSAT_REG		0x0121
+#define RSAT_REG		0x0122
+/* Color correction */
+#define CMC_CTL_REG		0x0130
+#define CMC_OFSGH_REG		0x0133
+#define CMC_OFSGL_REG		0x0135
+#define CMC_SIGN_REG		0x0136
+#define CMC_GOFS_REG		0x0137
+#define CMC_COEF_REG(n)		(0x0138 + (n))
+#define CMC_OFS_REG(n)		(0x0141 + (n))
+/* Gamma correction */
+#define GMA_CTL_REG		0x0160
+#define GMA_COEF_REG(n)		(0x0161 + (n))
+/* Lens Shading */
+#define LENS_CTRL_REG		0x01D0
+#define LENS_XCEN_REG		0x01D1
+#define LENS_YCEN_REG		0x01D2
+#define LENS_RC_REG		0x01D3
+#define LENS_GC_REG		0x01D4
+#define LENS_BC_REG		0x01D5
+#define L_AGON_REG		0x01D6
+#define L_AGOFF_REG		0x01D7
+/* Page 3 - Auto Exposure */
+#define AE_CTL_REG(n)		(0x0310 + (n))
+#define AE_CTL9_REG		0x032C
+#define AE_CTL10_REG		0x032D
+#define AE_YLVL_REG		0x031C
+#define AE_YTH_REG(n)		(0x031D + (n))
+#define AE_WGT_REG		0x0326
+#define EXP_TIMEH_REG		0x0333
+#define EXP_TIMEM_REG		0x0334
+#define EXP_TIMEL_REG		0x0335
+#define EXP_MMINH_REG		0x0336
+#define EXP_MMINL_REG		0x0337
+#define EXP_MMAXH_REG		0x0338
+#define EXP_MMAXM_REG		0x0339
+#define EXP_MMAXL_REG		0x033A
+/* Page 4 - Auto White Balance */
+#define AWB_CTL_REG(n)		(0x0410 + (n))
+#define AWB_ENABE		0x80
+#define AWB_WGHT_REG		0x0419
+#define BGAIN_PAR_REG(n)	(0x044F + (n))
+/* Manual white balance, when AWB_CTL2[0]=1 */
+#define MWB_RGAIN_REG		0x0466
+#define MWB_BGAIN_REG		0x0467
+
+/* The token to mark an array end */
+#define REG_TERM		0xFFFF
+
+struct noon010_format {
+	enum v4l2_mbus_pixelcode code;
+	enum v4l2_colorspace colorspace;
+	u16 ispctl1_reg;
+};
+
+struct noon010_frmsize {
+	u16 width;
+	u16 height;
+	int vid_ctl1;
+};
+
+static const char * const noon010_supply_name[] = {
+	"vdd_core", "vddio", "vdda"
+};
+
+#define NOON010_NUM_SUPPLIES ARRAY_SIZE(noon010_supply_name)
+
+struct noon010_info {
+	struct v4l2_subdev sd;
+	struct v4l2_ctrl_handler hdl;
+	const struct noon010pc30_platform_data *pdata;
+	const struct noon010_format *curr_fmt;
+	const struct noon010_frmsize *curr_win;
+	unsigned int hflip:1;
+	unsigned int vflip:1;
+	unsigned int power:1;
+	u8 i2c_reg_page;
+	struct regulator_bulk_data supply[NOON010_NUM_SUPPLIES];
+	u32 gpio_nreset;
+	u32 gpio_nstby;
+};
+
+struct i2c_regval {
+	u16 addr;
+	u16 val;
+};
+
+/* Supported resolutions. */
+static const struct noon010_frmsize noon010_sizes[] = {
+	{
+		.width		= 352,
+		.height		= 288,
+		.vid_ctl1	= 0,
+	}, {
+		.width		= 176,
+		.height		= 144,
+		.vid_ctl1	= 0x10,
+	}, {
+		.width		= 88,
+		.height		= 72,
+		.vid_ctl1	= 0x20,
+	},
+};
+
+/* Supported pixel formats. */
+static const struct noon010_format noon010_formats[] = {
+	{
+		.code		= V4L2_MBUS_FMT_YUYV8_2X8,
+		.colorspace	= V4L2_COLORSPACE_JPEG,
+		.ispctl1_reg	= 0x03,
+	}, {
+		.code		= V4L2_MBUS_FMT_YVYU8_2X8,
+		.colorspace	= V4L2_COLORSPACE_JPEG,
+		.ispctl1_reg	= 0x02,
+	}, {
+		.code		= V4L2_MBUS_FMT_VYUY8_2X8,
+		.colorspace	= V4L2_COLORSPACE_JPEG,
+		.ispctl1_reg	= 0,
+	}, {
+		.code		= V4L2_MBUS_FMT_UYVY8_2X8,
+		.colorspace	= V4L2_COLORSPACE_JPEG,
+		.ispctl1_reg	= 0x01,
+	}, {
+		.code		= V4L2_MBUS_FMT_RGB565_2X8_BE,
+		.colorspace	= V4L2_COLORSPACE_JPEG,
+		.ispctl1_reg	= 0x40,
+	},
+};
+
+static const struct i2c_regval noon010_base_regs[] = {
+	{ WIN_COLL_REG,		0x06 },	{ HBLANKL_REG,		0x7C },
+	/* Color corection and saturation */
+	{ ISP_CTL_REG(0),	0x30 }, { ISP_CTL_REG(2),	0x30 },
+	{ YOFS_REG,		0x80 }, { DARK_YOFS_REG,	0x04 },
+	{ SAT_CTL_REG,		0x1F }, { BSAT_REG,		0x90 },
+	{ CMC_CTL_REG,		0x0F }, { CMC_OFSGH_REG,	0x3C },
+	{ CMC_OFSGL_REG,	0x2C }, { CMC_SIGN_REG,		0x3F },
+	{ CMC_COEF_REG(0),	0x79 }, { CMC_OFS_REG(0),	0x00 },
+	{ CMC_COEF_REG(1),	0x39 }, { CMC_OFS_REG(1),	0x00 },
+	{ CMC_COEF_REG(2),	0x00 }, { CMC_OFS_REG(2),	0x00 },
+	{ CMC_COEF_REG(3),	0x11 }, { CMC_OFS_REG(3),	0x8B },
+	{ CMC_COEF_REG(4),	0x65 }, { CMC_OFS_REG(4),	0x07 },
+	{ CMC_COEF_REG(5),	0x14 }, { CMC_OFS_REG(5),	0x04 },
+	{ CMC_COEF_REG(6),	0x01 }, { CMC_OFS_REG(6),	0x9C },
+	{ CMC_COEF_REG(7),	0x33 }, { CMC_OFS_REG(7),	0x89 },
+	{ CMC_COEF_REG(8),	0x74 }, { CMC_OFS_REG(8),	0x25 },
+	/* Automatic white balance */
+	{ AWB_CTL_REG(0),	0x78 }, { AWB_CTL_REG(1),	0x2E },
+	{ AWB_CTL_REG(2),	0x20 }, { AWB_CTL_REG(3),	0x85 },
+	/* Auto exposure */
+	{ AE_CTL_REG(0),	0xDC }, { AE_CTL_REG(1),	0x81 },
+	{ AE_CTL_REG(2),	0x30 }, { AE_CTL_REG(3),	0xA5 },
+	{ AE_CTL_REG(4),	0x40 }, { AE_CTL_REG(5),	0x51 },
+	{ AE_CTL_REG(6),	0x33 }, { AE_CTL_REG(7),	0x7E },
+	{ AE_CTL9_REG,		0x00 }, { AE_CTL10_REG,		0x02 },
+	{ AE_YLVL_REG,		0x44 },	{ AE_YTH_REG(0),	0x34 },
+	{ AE_YTH_REG(1),	0x30 },	{ AE_WGT_REG,		0xD5 },
+	/* Lens shading compensation */
+	{ LENS_CTRL_REG,	0x01 }, { LENS_XCEN_REG,	0x80 },
+	{ LENS_YCEN_REG,	0x70 }, { LENS_RC_REG,		0x53 },
+	{ LENS_GC_REG,		0x40 }, { LENS_BC_REG,		0x3E },
+	{ REG_TERM,		0 },
+};
+
+static inline struct noon010_info *to_noon010(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct noon010_info, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+	return &container_of(ctrl->handler, struct noon010_info, hdl)->sd;
+}
+
+static inline int set_i2c_page(struct noon010_info *info,
+			       struct i2c_client *client, unsigned int reg)
+{
+	u32 page = reg >> 8 & 0xFF;
+	int ret = 0;
+
+	if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
+		ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
+		if (!ret)
+			info->i2c_reg_page = page;
+	}
+	return ret;
+}
+
+static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	struct noon010_info *info = to_noon010(sd);
+	int ret = set_i2c_page(info, client, reg_addr);
+
+	if (ret)
+		return ret;
+	return i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
+}
+
+static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	struct noon010_info *info = to_noon010(sd);
+	int ret = set_i2c_page(info, client, reg_addr);
+
+	if (ret)
+		return ret;
+	return i2c_smbus_write_byte_data(client, reg_addr & 0xFF, val);
+}
+
+static inline int noon010_bulk_write_reg(struct v4l2_subdev *sd,
+					 const struct i2c_regval *msg)
+{
+	while (msg->addr != REG_TERM) {
+		int ret = cam_i2c_write(sd, msg->addr, msg->val);
+
+		if (ret)
+			return ret;
+		msg++;
+	}
+	return 0;
+}
+
+/* Device reset and sleep mode control */
+static int noon010_power_ctrl(struct v4l2_subdev *sd, bool reset, bool sleep)
+{
+	struct noon010_info *info = to_noon010(sd);
+	u8 reg = sleep ? 0xF1 : 0xF0;
+	int ret = 0;
+
+	if (reset)
+		ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
+	if (!ret) {
+		ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
+		if (reset && !ret)
+			info->i2c_reg_page = -1;
+	}
+	return ret;
+}
+
+/* Automatic white balance control */
+static int noon010_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
+{
+	int ret;
+
+	ret = cam_i2c_write(sd, AWB_CTL_REG(1), on ? 0x2E : 0x2F);
+	if (!ret)
+		ret = cam_i2c_write(sd, AWB_CTL_REG(0), on ? 0xFB : 0x7B);
+	return ret;
+}
+
+static int noon010_set_flip(struct v4l2_subdev *sd, int hflip, int vflip)
+{
+	struct noon010_info *info = to_noon010(sd);
+	int reg, ret;
+
+	reg = cam_i2c_read(sd, VDO_CTL_REG(1));
+	if (reg < 0)
+		return reg;
+
+	reg &= 0x7C;
+	if (hflip)
+		reg |= 0x01;
+	if (vflip)
+		reg |= 0x02;
+
+	ret = cam_i2c_write(sd, VDO_CTL_REG(1), reg | 0x80);
+	if (!ret) {
+		info->hflip = hflip;
+		info->vflip = vflip;
+	}
+	return ret;
+}
+
+/* Configure resolution and color format */
+static int noon010_set_params(struct v4l2_subdev *sd)
+{
+	struct noon010_info *info = to_noon010(sd);
+	int ret;
+
+	if (!info->curr_win)
+		return -EINVAL;
+
+	ret = cam_i2c_write(sd, VDO_CTL_REG(0), info->curr_win->vid_ctl1);
+
+	if (!ret && info->curr_fmt)
+		ret = cam_i2c_write(sd, ISP_CTL_REG(0),
+				info->curr_fmt->ispctl1_reg);
+	return ret;
+}
+
+/* Find nearest matching image pixel size. */
+static int noon010_try_frame_size(struct v4l2_mbus_framefmt *mf)
+{
+	unsigned int min_err = ~0;
+	int i = ARRAY_SIZE(noon010_sizes);
+	const struct noon010_frmsize *fsize = &noon010_sizes[0],
+		*match = NULL;
+
+	while (i--) {
+		int err = abs(fsize->width - mf->width)
+				+ abs(fsize->height - mf->height);
+
+		if (err < min_err) {
+			min_err = err;
+			match = fsize;
+		}
+		fsize++;
+	}
+	if (match) {
+		mf->width  = match->width;
+		mf->height = match->height;
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int power_enable(struct noon010_info *info)
+{
+	int ret;
+
+	if (info->power) {
+		v4l2_info(&info->sd, "%s: sensor is already on\n", __func__);
+		return 0;
+	}
+
+	if (gpio_is_valid(info->gpio_nstby))
+		gpio_set_value(info->gpio_nstby, 0);
+
+	if (gpio_is_valid(info->gpio_nreset))
+		gpio_set_value(info->gpio_nreset, 0);
+
+	ret = regulator_bulk_enable(NOON010_NUM_SUPPLIES, info->supply);
+	if (ret)
+		return ret;
+
+	if (gpio_is_valid(info->gpio_nreset)) {
+		msleep(50);
+		gpio_set_value(info->gpio_nreset, 1);
+	}
+	if (gpio_is_valid(info->gpio_nstby)) {
+		udelay(1000);
+		gpio_set_value(info->gpio_nstby, 1);
+	}
+	if (gpio_is_valid(info->gpio_nreset)) {
+		udelay(1000);
+		gpio_set_value(info->gpio_nreset, 0);
+		msleep(100);
+		gpio_set_value(info->gpio_nreset, 1);
+		msleep(20);
+	}
+	info->power = 1;
+
+	v4l2_dbg(1, debug, &info->sd,  "%s: sensor is on\n", __func__);
+	return 0;
+}
+
+static int power_disable(struct noon010_info *info)
+{
+	int ret;
+
+	if (!info->power) {
+		v4l2_info(&info->sd, "%s: sensor is already off\n", __func__);
+		return 0;
+	}
+
+	ret = regulator_bulk_disable(NOON010_NUM_SUPPLIES, info->supply);
+	if (ret)
+		return ret;
+
+	if (gpio_is_valid(info->gpio_nstby))
+		gpio_set_value(info->gpio_nstby, 0);
+
+	if (gpio_is_valid(info->gpio_nreset))
+		gpio_set_value(info->gpio_nreset, 0);
+
+	info->power = 0;
+
+	v4l2_dbg(1, debug, &info->sd,  "%s: sensor is off\n", __func__);
+
+	return 0;
+}
+
+static int noon010_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_subdev *sd = to_sd(ctrl);
+
+	v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
+		 __func__, ctrl->id, ctrl->val);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUTO_WHITE_BALANCE:
+		return noon010_enable_autowhitebalance(sd, ctrl->val);
+	case V4L2_CID_BLUE_BALANCE:
+		return cam_i2c_write(sd, MWB_BGAIN_REG, ctrl->val);
+	case V4L2_CID_RED_BALANCE:
+		return cam_i2c_write(sd, MWB_RGAIN_REG, ctrl->val);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int noon010_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+			    enum v4l2_mbus_pixelcode *code)
+{
+	if (!code || index >= ARRAY_SIZE(noon010_formats))
+		return -EINVAL;
+
+	*code = noon010_formats[index].code;
+	return 0;
+}
+
+static int noon010_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
+{
+	struct noon010_info *info = to_noon010(sd);
+	int ret;
+
+	if (!mf)
+		return -EINVAL;
+
+	if (!info->curr_win || !info->curr_fmt) {
+		ret = noon010_set_params(sd);
+		if (ret)
+			return ret;
+	}
+
+	mf->width	= info->curr_win->width;
+	mf->height	= info->curr_win->height;
+	mf->code	= info->curr_fmt->code;
+	mf->colorspace	= info->curr_fmt->colorspace;
+	mf->field	= V4L2_FIELD_NONE;
+
+	return 0;
+}
+
+/* Return nearest media bus frame format. */
+static const struct noon010_format *try_fmt(struct v4l2_subdev *sd,
+					    struct v4l2_mbus_framefmt *mf)
+{
+	int i = ARRAY_SIZE(noon010_formats);
+
+	noon010_try_frame_size(mf);
+
+	while (i--)
+		if (mf->code == noon010_formats[i].code)
+			break;
+
+	mf->code = noon010_formats[i].code;
+
+	return &noon010_formats[i];
+}
+
+static int noon010_try_fmt(struct v4l2_subdev *sd,
+			   struct v4l2_mbus_framefmt *mf)
+{
+	if (!sd || !mf)
+		return -EINVAL;
+
+	try_fmt(sd, mf);
+	return 0;
+}
+
+static int noon010_s_fmt(struct v4l2_subdev *sd,
+			 struct v4l2_mbus_framefmt *mf)
+{
+	struct noon010_info *info = to_noon010(sd);
+
+	if (!sd || !mf)
+		return -EINVAL;
+
+	info->curr_fmt = try_fmt(sd, mf);
+
+	return noon010_set_params(sd);
+}
+
+static int noon010_base_config(struct v4l2_subdev *sd)
+{
+	struct noon010_info *info = to_noon010(sd);
+	int ret;
+
+	ret = noon010_bulk_write_reg(sd, noon010_base_regs);
+	if (!ret) {
+		info->curr_fmt = &noon010_formats[0];
+		info->curr_win = &noon010_sizes[0];
+		ret = noon010_set_params(sd);
+	}
+	if (!ret)
+		ret = noon010_set_flip(sd, 1, 0);
+	if (!ret)
+		ret = noon010_power_ctrl(sd, false, false);
+
+	/* sync the handler and the registers state */
+	v4l2_ctrl_handler_setup(&to_noon010(sd)->hdl);
+	return ret;
+}
+
+static int noon010_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct noon010_info *info = to_noon010(sd);
+	const struct noon010pc30_platform_data *pdata = info->pdata;
+	int ret = 0;
+
+	if (WARN(pdata == NULL, "No platform data!\n"))
+		return -ENOMEM;
+
+	if (on) {
+		ret = power_enable(info);
+		if (ret)
+			return ret;
+		ret = noon010_base_config(sd);
+	} else {
+		noon010_power_ctrl(sd, false, true);
+		ret = power_disable(info);
+		info->curr_win = NULL;
+		info->curr_fmt = NULL;
+	}
+
+	return ret;
+}
+
+static int noon010_g_chip_ident(struct v4l2_subdev *sd,
+				struct v4l2_dbg_chip_ident *chip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return v4l2_chip_ident_i2c_client(client, chip,
+					  V4L2_IDENT_NOON010PC30, 0);
+}
+
+static int noon010_log_status(struct v4l2_subdev *sd)
+{
+	struct noon010_info *info = to_noon010(sd);
+
+	v4l2_ctrl_handler_log_status(&info->hdl, sd->name);
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops noon010_ctrl_ops = {
+	.s_ctrl = noon010_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops noon010_core_ops = {
+	.g_chip_ident	= noon010_g_chip_ident,
+	.s_power	= noon010_s_power,
+	.g_ctrl		= v4l2_subdev_g_ctrl,
+	.s_ctrl		= v4l2_subdev_s_ctrl,
+	.queryctrl	= v4l2_subdev_queryctrl,
+	.querymenu	= v4l2_subdev_querymenu,
+	.g_ext_ctrls	= v4l2_subdev_g_ext_ctrls,
+	.try_ext_ctrls	= v4l2_subdev_try_ext_ctrls,
+	.s_ext_ctrls	= v4l2_subdev_s_ext_ctrls,
+	.log_status	= noon010_log_status,
+};
+
+static const struct v4l2_subdev_video_ops noon010_video_ops = {
+	.g_mbus_fmt	= noon010_g_fmt,
+	.s_mbus_fmt	= noon010_s_fmt,
+	.try_mbus_fmt	= noon010_try_fmt,
+	.enum_mbus_fmt	= noon010_enum_fmt,
+};
+
+static const struct v4l2_subdev_ops noon010_ops = {
+	.core	= &noon010_core_ops,
+	.video	= &noon010_video_ops,
+};
+
+/* Return 0 if NOON010PC30L sensor type was detected or -ENODEV otherwise. */
+static int noon010_detect(struct i2c_client *client, struct noon010_info *info)
+{
+	int ret;
+
+	ret = power_enable(info);
+	if (ret)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
+	if (ret < 0)
+		dev_err(&client->dev, "I2C read failed: 0x%X\n", ret);
+
+	power_disable(info);
+
+	return ret == NOON010PC30_ID ? 0 : -ENODEV;
+}
+
+static int noon010_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct noon010_info *info;
+	struct v4l2_subdev *sd;
+	const struct noon010pc30_platform_data *pdata
+		= client->dev.platform_data;
+	int ret;
+	int i;
+
+	if (!pdata) {
+		dev_err(&client->dev, "No platform data!\n");
+		return -EIO;
+	}
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	sd = &info->sd;
+	strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
+	v4l2_i2c_subdev_init(sd, client, &noon010_ops);
+
+	v4l2_ctrl_handler_init(&info->hdl, 3);
+
+	v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
+			  V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
+	v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
+			  V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
+	v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
+			  V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
+
+	sd->ctrl_handler = &info->hdl;
+
+	ret = info->hdl.error;
+	if (ret)
+		goto np_err;
+
+	info->pdata		= client->dev.platform_data;
+	info->i2c_reg_page	= -1;
+	info->gpio_nreset	= -EINVAL;
+	info->gpio_nstby	= -EINVAL;
+
+	if (gpio_is_valid(pdata->gpio_nreset)) {
+		ret = gpio_request(pdata->gpio_nreset, "NOON010PC30 NRST");
+		if (ret) {
+			dev_err(&client->dev, "GPIO request error: %d\n", ret);
+			goto np_err;
+		}
+		info->gpio_nreset = pdata->gpio_nreset;
+		gpio_direction_output(info->gpio_nreset, 0);
+		gpio_export(info->gpio_nreset, 0);
+	}
+
+	if (gpio_is_valid(pdata->gpio_nstby)) {
+		ret = gpio_request(pdata->gpio_nstby, "NOON010PC30 NSTBY");
+		if (ret) {
+			dev_err(&client->dev, "GPIO request error: %d\n", ret);
+			goto np_gpio_err;
+		}
+		info->gpio_nstby = pdata->gpio_nstby;
+		gpio_direction_output(info->gpio_nstby, 0);
+		gpio_export(info->gpio_nstby, 0);
+	}
+
+	for (i = 0; i < NOON010_NUM_SUPPLIES; i++)
+		info->supply[i].supply = noon010_supply_name[i];
+
+	ret = regulator_bulk_get(&client->dev, NOON010_NUM_SUPPLIES,
+				 info->supply);
+	if (ret)
+		goto np_reg_err;
+
+	ret = noon010_detect(client, info);
+	if (!ret)
+		return 0;
+
+	/* the sensor detection failed */
+	regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
+np_reg_err:
+	if (gpio_is_valid(info->gpio_nstby))
+		gpio_free(info->gpio_nstby);
+np_gpio_err:
+	if (gpio_is_valid(info->gpio_nreset))
+		gpio_free(info->gpio_nreset);
+np_err:
+	v4l2_ctrl_handler_free(&info->hdl);
+	v4l2_device_unregister_subdev(sd);
+	kfree(info);
+	return ret;
+}
+
+static int noon010_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct noon010_info *info = to_noon010(sd);
+
+	v4l2_device_unregister_subdev(sd);
+	v4l2_ctrl_handler_free(&info->hdl);
+
+	regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
+
+	if (gpio_is_valid(info->gpio_nreset))
+		gpio_free(info->gpio_nreset);
+
+	if (gpio_is_valid(info->gpio_nstby))
+		gpio_free(info->gpio_nstby);
+
+	kfree(info);
+	return 0;
+}
+
+static const struct i2c_device_id noon010_id[] = {
+	{ MODULE_NAME, 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, noon010_id);
+
+
+static struct i2c_driver noon010_i2c_driver = {
+	.driver = {
+		.name = MODULE_NAME
+	},
+	.probe		= noon010_probe,
+	.remove		= noon010_remove,
+	.id_table	= noon010_id,
+};
+
+static int __init noon010_init(void)
+{
+	return i2c_add_driver(&noon010_i2c_driver);
+}
+
+static void __exit noon010_exit(void)
+{
+	i2c_del_driver(&noon010_i2c_driver);
+}
+
+module_init(noon010_init);
+module_exit(noon010_exit);
+
+MODULE_DESCRIPTION("Siliconfile NOON010PC30 camera driver");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_LICENSE("GPL");

include/media/noon010pc30.h

+/*
+ * Driver header for NOON010PC30L camera sensor chip.
+ *
+ * Copyright (c) 2010 Samsung Electronics, Co. Ltd
+ * Contact: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef NOON010PC30_H
+#define NOON010PC30_H
+
+/**
+ * @clk_rate: the clock frequency in Hz
+ * @gpio_nreset: GPIO driving nRESET pin
+ * @gpio_nstby: GPIO driving nSTBY pin
+ */
+
+struct noon010pc30_platform_data {
+	unsigned long clk_rate;
+	int gpio_nreset;
+	int gpio_nstby;
+};
+
+#endif /* NOON010PC30_H */