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Gmane
From: Martin Hostettler <martin <at> neutronstar.dyndns.org>
Subject: [PATCH] v4l: Add driver for Micron MT9M032 camera sensor
Newsgroups: gmane.linux.drivers.video-input-infrastructure
Date: Tuesday 18th January 2011 22:18:42 UTC (over 5 years ago)
The MT9M032 is a parallel 1284x812 sensor from Micron controlled through
I2C.

The driver creates a V4L2 subdevice. It currently supports cropping, gain,
exposure and v/h flipping controls in monochrome mode with an
external pixel clock.

Signed-off-by: Martin Hostettler 
---
 drivers/media/video/Kconfig     |    7 +
 drivers/media/video/Makefile    |    1 +
 drivers/media/video/mt9m032.c   |  834
+++++++++++++++++++++++++++++++++++++++
 drivers/media/video/mt9m032.h   |   38 ++
 include/media/v4l2-chip-ident.h |    1 +
 5 files changed, 881 insertions(+), 0 deletions(-)
 create mode 100644 drivers/media/video/mt9m032.c
 create mode 100644 drivers/media/video/mt9m032.h

diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 9fad1a6..f2d5f80 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -773,6 +773,13 @@ config SOC_CAMERA_MT9M001
 	  This driver supports MT9M001 cameras from Micron, monochrome
 	  and colour models.
 
+config VIDEO_MT9M032
+	tristate "MT9M032 camera sensor support"
+	depends on I2C && VIDEO_V4L2
+	help
+	  This driver supports MT9M032 cameras from Micron, monochrome
+	  models only.
+
 config SOC_CAMERA_MT9M111
 	tristate "mt9m111, mt9m112 and mt9m131 support"
 	depends on SOC_CAMERA && I2C
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 8f70b06..3e7299f 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
 obj-$(CONFIG_VIDEO_OV7670) 	+= ov7670.o
 obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o
 obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o
+obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o
 obj-$(CONFIG_VIDEO_MT9T001) += mt9t001.o
 obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o
 obj-$(CONFIG_VIDEO_MT9V032) += mt9v032.o
diff --git a/drivers/media/video/mt9m032.c b/drivers/media/video/mt9m032.c
new file mode 100644
index 0000000..fe6af7b
--- /dev/null
+++ b/drivers/media/video/mt9m032.c
@@ -0,0 +1,834 @@
+/*
+ * Driver for MT9M032 CMOS Image Sensor from Micron
+ *
+ * Copyright (C) 2010-2011 Lund Engineering
+ * Contact: Gil Lund <[email protected]>
+ * Author: Martin Hostettler 
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include "mt9m032.h"
+
+#define MT9M032_CHIP_VERSION		0x00
+#define MT9M032_ROW_START		0x01
+#define MT9M032_COLUMN_START		0x02
+#define MT9M032_ROW_SIZE		0x03
+#define MT9M032_COLUMN_SIZE		0x04
+#define MT9M032_HBLANK			0x05
+#define MT9M032_VBLANK			0x06
+#define MT9M032_SHUTTER_WIDTH_HIGH	0x08
+#define MT9M032_SHUTTER_WIDTH_LOW	0x09
+#define MT9M032_PIX_CLK_CTRL		0x0A
+#define MT9M032_RESTART			0x0B
+#define MT9M032_RESET			0x0D
+#define MT9M032_PLL_CONFIG1		0x11
+#define MT9M032_READ_MODE1		0x1E
+#define MT9M032_READ_MODE2		0x20
+#define MT9M032_GAIN_GREEN1		0x2B
+#define MT9M032_GAIN_BLUE		0x2C
+#define MT9M032_GAIN_RED		0x2D
+#define MT9M032_GAIN_GREEN2		0x2E
+/* write only */
+#define MT9M032_GAIN_ALL		0x35
+#define MT9M032_FORMATTER1		0x9E
+#define MT9M032_FORMATTER2		0x9F
+
+#define to_mt9m032(sd)	container_of(sd, struct mt9m032, subdev)
+#define to_dev(sensor)	&((struct i2c_client
*)v4l2_get_subdevdata(&sensor->subdev))->dev
+
+struct mt9m032 {
+	struct v4l2_subdev subdev;
+	struct media_pad pad;
+	struct mt9m032_platform_data *pdata;
+	struct v4l2_ctrl_handler ctrls;
+
+	bool streaming;
+
+	int pix_clock;
+
+	struct v4l2_mbus_framefmt format;	/* height and width always the same as
in crop */
+	struct v4l2_rect crop;
+	struct v4l2_fract frame_interval;
+
+	struct v4l2_ctrl *hflip, *vflip, *gain, *exposure;
+};
+
+
+static int mt9m032_read_reg(struct i2c_client *client, const u8 reg)
+{
+	s32 data = i2c_smbus_read_word_data(client, reg);
+	return data < 0 ? data : swab16(data);
+}
+
+static int mt9m032_write_reg(struct i2c_client *client, const u8 reg,
+		     const u16 data)
+{
+	return i2c_smbus_write_word_data(client, reg, swab16(data));
+}
+
+
+static unsigned long mt9m032_row_time(struct mt9m032 *sensor, int width)
+{
+	int effective_width;
+	u64 ns;
+	effective_width = width + 716; /* emperical value */
+	ns = 1000000000ll * effective_width;
+	do_div(ns, sensor->pix_clock);
+	dev_dbg(to_dev(sensor),	"MT9M032 line time: %llu ns\n", ns);
+	return ns;
+}
+
+static int mt9m032_update_timing(struct mt9m032 *sensor,
+				 const struct v4l2_fract *interval,
+				 const struct v4l2_rect *crop)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	u64 ns = 1000000000; /* 1 sec */
+	unsigned long row_time;
+	int additional_blanking_rows;
+	int min_blank;
+
+	if (!interval)
+		interval = &sensor->frame_interval;
+	if (!crop)
+		crop = &sensor->crop;
+
+	ns = ns * interval->numerator;
+	do_div(ns, interval->denominator);
+
+	row_time = mt9m032_row_time(sensor, crop->width);
+	do_div(ns, row_time);
+
+	additional_blanking_rows = ns - crop->height;
+
+	/* enforce minimal 1.6ms blanking time. */
+	min_blank = 1600000 / row_time;
+	if (additional_blanking_rows < min_blank)
+		additional_blanking_rows = min_blank;
+
+	dev_dbg(to_dev(sensor),
+		"%s: V-blank %i\n", __func__, additional_blanking_rows);
+	if (additional_blanking_rows > 0x7ff) {
+		/* hardware limits 11 bit values */
+		dev_warn(to_dev(sensor),
+			"mt9m032: frame rate too low.\n");
+		additional_blanking_rows = 0x7ff;
+	}
+	return mt9m032_write_reg(client, MT9M032_VBLANK,
additional_blanking_rows);
+}
+
+static int mt9m032_update_geom_timing(struct mt9m032 *sensor,
+				 const struct v4l2_rect *crop)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	int ret;
+
+	if (!crop)
+		crop = &sensor->crop;
+
+	ret = mt9m032_write_reg(client, MT9M032_COLUMN_SIZE, crop->width - 1);
+	if (!ret)
+		mt9m032_write_reg(client, MT9M032_ROW_SIZE, crop->height - 1);
+	/* offsets compensate for black border */
+	if (!ret)
+		mt9m032_write_reg(client, MT9M032_COLUMN_START, crop->left + 16);
+	if (!ret)
+		mt9m032_write_reg(client, MT9M032_ROW_START, crop->top + 52);
+	if (!ret)
+		ret = mt9m032_update_timing(sensor, NULL, crop);
+	return ret;
+}
+
+static int update_formatter2(struct mt9m032 *sensor, bool streaming)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+
+	u16 reg_val =   0x1000   /* Dout enable */
+		      | 0x0070;  /* parts reserved! */
+				 /* possibly for changing to 14-bit mode */
+
+	if (streaming)
+		reg_val |= 0x2000;   /* pixclock enable */
+
+	return mt9m032_write_reg(client, MT9M032_FORMATTER2, reg_val);
+}
+
+static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	int ret;
+
+	ret = update_formatter2(sensor, streaming);
+	if (!ret)
+		sensor->streaming = streaming;
+	return ret;
+}
+
+static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_fh *fh,
+				  struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index != 0 || code->pad != 0)
+		return -EINVAL;
+	code->code = V4L2_MBUS_FMT_Y8_1X8;
+	return 0;
+}
+
+static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev,
+				   struct v4l2_subdev_fh *fh,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->index != 0 || fse->code != V4L2_MBUS_FMT_Y8_1X8 || fse->pad !=
0)
+		return -EINVAL;
+
+	fse->min_width = 32;
+	fse->max_width = 1440;
+	fse->min_height = 32;
+	fse->max_height = 1096;
+
+	return 0;
+}
+
+/**
+ * __mt9m032_get_pad_crop() - get crop rect
+ * @sensor:	pointer to the sensor struct
+ * @fh:	filehandle for getting the try crop rect from
+ * @which:	select try or active crop rect
+ * Returns a pointer the current active or fh relative try crop rect
+ */
+static struct v4l2_rect *__mt9m032_get_pad_crop(struct mt9m032 *sensor,
+						struct v4l2_subdev_fh *fh,
+						u32 which)
+{
+	switch (which) {
+	case V4L2_SUBDEV_FORMAT_TRY:
+		return v4l2_subdev_get_try_crop(fh, 0);
+	case V4L2_SUBDEV_FORMAT_ACTIVE:
+		return &sensor->crop;
+	default:
+		return NULL;
+	}
+}
+
+/**
+ * __mt9m032_get_pad_format() - get format
+ * @sensor:	pointer to the sensor struct
+ * @fh:	filehandle for getting the try format from
+ * @which:	select try or active format
+ * Returns a pointer the current active or fh relative try format
+ */
+static struct v4l2_mbus_framefmt *__mt9m032_get_pad_format(struct mt9m032
*sensor,
+							   struct v4l2_subdev_fh *fh,
+							   u32 which)
+{
+	switch (which) {
+	case V4L2_SUBDEV_FORMAT_TRY:
+		return v4l2_subdev_get_try_format(fh, 0);
+	case V4L2_SUBDEV_FORMAT_ACTIVE:
+		return &sensor->format;
+	default:
+		return NULL;
+	}
+}
+
+#define OFFSET_UNCHANGED	0xFFFFFFFF
+static int mt9m032_set_pad_geom(struct mt9m032 *sensor,
+				struct v4l2_subdev_fh *fh,
+				u32 which, u32 pad,
+				s32 top, s32 left, s32 width, s32 height)
+{
+	struct v4l2_mbus_framefmt tmp_format;
+	struct v4l2_rect tmp_crop;
+	struct v4l2_mbus_framefmt *format;
+	struct v4l2_rect *crop;
+
+	if (pad != 0)
+		return -EINVAL;
+
+	format = __mt9m032_get_pad_format(sensor, fh, which);
+	crop = __mt9m032_get_pad_crop(sensor, fh, which);
+	if (!format || !crop)
+		return -EINVAL;
+	if (which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		tmp_crop = *crop;
+		tmp_format = *format;
+		format = &tmp_format;
+		crop = &tmp_crop;
+	}
+
+	if (top != OFFSET_UNCHANGED)
+		crop->top = top & ~0x1;
+	if (left != OFFSET_UNCHANGED)
+		crop->left = left;
+	crop->height = height;
+	crop->width = width & ~1;
+
+	format->height = crop->height;
+	format->width = crop->width;
+
+	if (which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		int ret = mt9m032_update_geom_timing(sensor, crop);
+		if (!ret) {
+			sensor->crop = tmp_crop;
+			sensor->format = tmp_format;
+		}
+		return ret;
+	} else {
+		return 0;
+	}
+}
+
+static int mt9m032_get_pad_format(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_fh *fh,
+				  struct v4l2_subdev_format *fmt)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	struct v4l2_mbus_framefmt *format;
+
+	if (fmt->pad != 0)
+		return -EINVAL;
+	format = __mt9m032_get_pad_format(sensor, fh, fmt->which);
+	if (format == NULL)
+		return -EINVAL;
+
+	fmt->format = *format;
+
+	return 0;
+}
+
+static int mt9m032_set_pad_format(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_fh *fh,
+				  struct v4l2_subdev_format *fmt)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	int ret;
+
+	if (sensor->streaming)
+		return -EBUSY;
+	if (fmt->format.code != V4L2_MBUS_FMT_Y8_1X8)
+		return -EINVAL;
+	/*
+	 * fmt->format.colorspace and fmt->format.field are ignored
+	 * and thus forced to fixed values by the get call below
+	 */
+
+	ret = mt9m032_set_pad_geom(sensor, fh, fmt->which, fmt->pad,
+				   OFFSET_UNCHANGED, OFFSET_UNCHANGED,
+				   fmt->format.width, fmt->format.height);
+
+	if (ret < 0)
+		return ret;
+	return mt9m032_get_pad_format(subdev, fh, fmt);
+}
+
+static int mt9m032_get_crop(struct v4l2_subdev *subdev, struct
v4l2_subdev_fh *fh,
+			    struct v4l2_subdev_crop *crop)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	struct v4l2_rect *curcrop;
+
+	if (crop->pad != 0)
+		return -EINVAL;
+	curcrop = __mt9m032_get_pad_crop(sensor, fh, crop->which);
+	if (!curcrop)
+		return -EINVAL;
+
+	crop->rect = *curcrop;
+
+	return 0;
+}
+
+static int mt9m032_set_crop(struct v4l2_subdev *subdev, struct
v4l2_subdev_fh *fh,
+		     struct v4l2_subdev_crop *crop)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	int ret;
+
+	if (sensor->streaming)
+		return -EBUSY;
+	ret = mt9m032_set_pad_geom(sensor, fh, crop->which, crop->pad,
+				   crop->rect.top, crop->rect.left,
+				   crop->rect.width, crop->rect.height);
+	if (ret < 0)
+		return ret;
+	return mt9m032_get_crop(subdev, fh, crop);
+}
+
+static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
+				      struct v4l2_subdev_frame_interval *fi)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+
+	fi->pad = 0;
+	memset(fi->reserved, 0, sizeof(fi->reserved));
+	fi->interval = sensor->frame_interval;
+
+	return 0;
+}
+
+static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
+				      struct v4l2_subdev_frame_interval *fi)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	int ret;
+
+	if (sensor->streaming)
+		return -EBUSY;
+
+	memset(fi->reserved, 0, sizeof(fi->reserved));
+
+	ret = mt9m032_update_timing(sensor, &fi->interval, NULL);
+	if (!ret)
+		sensor->frame_interval = fi->interval;
+	return ret;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9m032_g_register(struct v4l2_subdev *sd,
+			      struct v4l2_dbg_register *reg)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	int val;
+
+	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
+		return -EINVAL;
+	if (reg->match.addr != client->addr)
+		return -ENODEV;
+
+	val = mt9m032_read_reg(client, reg->reg);
+	if (val < 0)
+		return -EIO;
+
+	reg->size = 2;
+	reg->val = (u64) val;
+
+	return 0;
+}
+
+static int mt9m032_s_register(struct v4l2_subdev *sd,
+			      struct v4l2_dbg_register *reg)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
+		return -EINVAL;
+
+	if (reg->match.addr != client->addr)
+		return -ENODEV;
+
+	if (mt9m032_write_reg(client, reg->reg, reg->val) < 0)
+		return -EIO;
+
+	return 0;
+}
+#endif
+
+static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool
hflip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+
+	int reg_val = (!!vflip) << 15
+		      | (!!hflip) << 14
+		      | 0x0040	/* row black level correction (ROW BLC) */
+		      | 0x0007;
+
+	return mt9m032_write_reg(client, MT9M032_READ_MODE2, reg_val);
+}
+
+static int mt9m032_set_hflip(struct mt9m032 *sensor, s32 val)
+{
+	return update_read_mode2(sensor, sensor->vflip->cur.val, val);
+}
+
+static int mt9m032_set_vflip(struct mt9m032 *sensor, s32 val)
+{
+	return update_read_mode2(sensor, val, sensor->hflip->cur.val);
+}
+
+static int mt9m032_set_exposure(struct mt9m032 *sensor, s32 val)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	int shutter_width;
+	u16 high_val, low_val;
+	int ret;
+
+	/* shutter width is in row times */
+	shutter_width = (val * 1000) / mt9m032_row_time(sensor,
sensor->crop.width);
+
+	high_val = (shutter_width >> 16) & 0xF;
+	low_val = shutter_width & 0xFFFF;
+
+	ret = mt9m032_write_reg(client, MT9M032_SHUTTER_WIDTH_HIGH, high_val);
+	if (!ret)
+		mt9m032_write_reg(client, MT9M032_SHUTTER_WIDTH_LOW, low_val);
+
+	return ret;
+}
+
+static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	int digital_gain_val;	/* in 1/8th (0..127) */
+	int analog_mul;		/* 0 or 1 */
+	int analog_gain_val;	/* in 1/16th. (0..63) */
+	u16 reg_val;
+
+	digital_gain_val = 51; /* from setup example */
+
+	if (val < 63) {
+		analog_mul = 0;
+		analog_gain_val = val;
+	} else {
+		analog_mul = 1;
+		analog_gain_val = val / 2;
+	}
+
+	/* a_gain = (1+analog_mul) + (analog_gain_val+1)/16 */
+	/* overall_gain = a_gain * (1 + digital_gain_val / 8) */
+
+	reg_val = (digital_gain_val & 0x7f) << 8
+		  | (analog_mul & 1) << 6
+		  | (analog_gain_val & 0x3f);
+
+	return mt9m032_write_reg(client, MT9M032_GAIN_ALL, reg_val);
+}
+
+static int mt9m032_setup_pll(struct mt9m032 *sensor)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	struct mt9m032_platform_data* pdata = sensor->pdata;
+	u16 reg_pll1;
+	unsigned int pre_div;
+	int res, ret;
+
+	/* TODO: also support other pre-div values */
+	if (pdata->pll_pre_div != 6) {
+		dev_warn(to_dev(sensor),
+			"Unsupported PLL pre-divisor value %u, using default 6\n",
+			pdata->pll_pre_div);
+		pre_div = 6;
+	} else {
+		pre_div = pdata->pll_pre_div;
+	}
+
+	sensor->pix_clock = pdata->ext_clock * pdata->pll_mul /
+		(pre_div * pdata->pll_out_div);
+
+	reg_pll1 = ((pdata->pll_out_div - 1) & 0x3F)
+		   | pdata->pll_mul << 8;
+
+	ret = mt9m032_write_reg(client, MT9M032_PLL_CONFIG1, reg_pll1);
+	if (!ret)
+		ret = mt9m032_write_reg(client, 0x10, 0x53); /* Select PLL as clock
source */
+
+	if (!ret)
+		ret = mt9m032_write_reg(client, MT9M032_READ_MODE1, 0x8006);
+							/* more reserved, Continuous */
+							/* Master Mode */
+	if (!ret)
+		res = mt9m032_read_reg(client, MT9M032_READ_MODE1);
+
+	if (!ret)
+		ret = mt9m032_write_reg(client, MT9M032_FORMATTER1, 0x111e);
+					/* Set 14-bit mode, select 7 divider */
+
+	return ret;
+}
+
+static int mt9m032_get_chip_ident(struct v4l2_subdev *subdev,
+		       struct v4l2_dbg_chip_ident *chip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+
+	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9M032, 0);
+}
+
+static int mt9m032_set_config(struct v4l2_subdev *subdev, int irq, void
*pdata)
+{
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+
+	int res, ret;
+
+	if (!pdata)
+		return -ENODEV;
+
+	sensor->pdata = pdata;
+
+	ret = mt9m032_write_reg(client, MT9M032_RESET, 1);	/* reset on */
+	if (!ret)
+		mt9m032_write_reg(client, MT9M032_RESET, 0);	/* reset off */
+
+	if (!ret) {
+		ret = mt9m032_setup_pll(sensor);
+		msleep(10);
+	}
+	/* Sensor Gain */
+	if (!ret)
+		ret = mt9m032_set_gain(sensor, sensor->gain->cur.val);
+
+	   /* Shutter Width */
+	if (!ret)
+		ret = mt9m032_set_exposure(sensor, sensor->exposure->cur.val);
+
+	/* SIZE */
+	if (!ret)
+		ret = mt9m032_update_geom_timing(sensor, NULL);
+
+	if (!ret)
+		ret = update_read_mode2(sensor, sensor->vflip->cur.val,
sensor->hflip->cur.val);
+
+	if (!ret)
+		ret = mt9m032_write_reg(client, 0x41, 0x0000);	/* reserved !!! */
+	if (!ret)
+		ret = mt9m032_write_reg(client, 0x42, 0x0003);	/* reserved !!! */
+	if (!ret)
+		ret = mt9m032_write_reg(client, 0x43, 0x0003);	/* reserved !!! */
+	if (!ret)
+		ret = mt9m032_write_reg(client, 0x7F, 0x0000);	/* reserved !!! */
+	if (ret == 0 && sensor->pdata->invert_pixclock)
+		mt9m032_write_reg(client, MT9M032_PIX_CLK_CTRL, 0x8000);
+
+	res = mt9m032_read_reg(client, MT9M032_PIX_CLK_CTRL);
+
+	if (!ret) {
+		ret = mt9m032_write_reg(client, MT9M032_RESTART, 0x0001); /* Restart on
*/
+		msleep(100);
+	}
+	if (!ret) {
+		ret = mt9m032_write_reg(client, MT9M032_RESTART, 0x0000); /* Restart off
*/
+		msleep(100);
+	}
+	if (!ret)
+		ret = update_formatter2(sensor, false);
+
+	return ret;
+}
+
+static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct mt9m032 *sensor = container_of(ctrl->handler, struct mt9m032,
ctrls);
+
+	switch (ctrl->id) {
+	case V4L2_CID_GAIN:
+		return mt9m032_set_gain(sensor, ctrl->val);
+		break;
+
+	case V4L2_CID_HFLIP:
+		return mt9m032_set_hflip(sensor, ctrl->val);
+		break;
+
+	case V4L2_CID_VFLIP:
+		return mt9m032_set_vflip(sensor, ctrl->val);
+		break;
+
+	case V4L2_CID_EXPOSURE:
+		return mt9m032_set_exposure(sensor, ctrl->val);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
+	.s_stream = mt9m032_s_stream,
+	.g_frame_interval = mt9m032_get_frame_interval,
+	.s_frame_interval = mt9m032_set_frame_interval,
+};
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static long mt9m032_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void
*arg)
+{
+	if (cmd == VIDIOC_DBG_G_REGISTER || cmd == VIDIOC_DBG_S_REGISTER) {
+		struct v4l2_dbg_register *p = arg;
+
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+
+		if (cmd == VIDIOC_DBG_G_REGISTER)
+			return v4l2_subdev_call(sd, core, g_register, p);
+		else
+			return v4l2_subdev_call(sd, core, s_register, p);
+	} else {
+		return -ENOIOCTLCMD;
+	}
+}
+#endif
+
+static struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
+	.s_ctrl = mt9m032_set_ctrl,
+};
+
+
+static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
+	.g_chip_ident = mt9m032_get_chip_ident,
+	.s_config = mt9m032_set_config,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.ioctl = mt9m032_ioctl,
+	.g_register = mt9m032_g_register,
+	.s_register = mt9m032_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
+	.enum_mbus_code = mt9m032_enum_mbus_code,
+	.enum_frame_size = mt9m032_enum_frame_size,
+	.get_fmt = mt9m032_get_pad_format,
+	.set_fmt = mt9m032_set_pad_format,
+	.set_crop = mt9m032_set_crop,
+	.get_crop = mt9m032_get_crop,
+};
+
+static const struct v4l2_subdev_ops mt9m032_ops = {
+	.core = &mt9m032_core_ops,
+	.video = &mt9m032_video_ops,
+	.pad = &mt9m032_pad_ops,
+};
+
+static int mt9m032_probe(struct i2c_client *client,
+			 const struct i2c_device_id *devid)
+{
+	struct mt9m032 *sensor;
+	int chip_version;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
{
+		dev_warn(&client->adapter->dev,
+			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+		return -EIO;
+	}
+
+	/*
+	 * This driver was developed with a camera module with seperate external
+	 * pix clock. For setups which use the clock from the camera interface
+	 * the code will need to be extended with the appropriate platform
+	 * callback to setup the clock.
+	 */
+	chip_version = mt9m032_read_reg(client, MT9M032_CHIP_VERSION);
+	if (0x1402 == chip_version) {
+		dev_info(&client->dev, "mt9m032: detected chip version 0x%x\n",
chip_version);
+	} else {
+		dev_warn(&client->dev, "mt9m032: error: detected unsupported chip
version 0x%x\n",
+			 chip_version);
+		return -ENODEV;
+	}
+
+	sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
+	if (sensor == NULL)
+		return -ENOMEM;
+
+	sensor->frame_interval.numerator = 1;
+	sensor->frame_interval.denominator = 30;
+
+	sensor->crop.left = 416;
+	sensor->crop.top = 360;
+	sensor->crop.width = 640;
+	sensor->crop.height = 480;
+
+	sensor->format.width = sensor->crop.width;
+	sensor->format.height = sensor->crop.height;
+	sensor->format.code = V4L2_MBUS_FMT_Y8_1X8;
+	sensor->format.field = V4L2_FIELD_NONE;
+	sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
+
+	v4l2_ctrl_handler_init(&sensor->ctrls, 4);
+	
+	sensor->gain = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
+			  V4L2_CID_GAIN, 0, 127, 1, 64);
+
+	sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
+			  V4L2_CID_HFLIP, 0, 1, 1, 0);
+	sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
+			  V4L2_CID_VFLIP, 0, 1, 1, 0);
+	sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
+			  V4L2_CID_EXPOSURE, 0, 8000, 1, 1700);    /* 1.7ms */
+
+	v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
+	sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	sensor->subdev.ctrl_handler = &sensor->ctrls;
+
+	sensor->pad.flags = MEDIA_PAD_FLAG_OUTPUT;
+	ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0);
+	if (ret < 0)
+		kfree(sensor);
+
+	return ret;
+}
+
+static int mt9m032_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct mt9m032 *sensor = to_mt9m032(subdev);
+
+	v4l2_device_unregister_subdev(&sensor->subdev);
+	media_entity_cleanup(&sensor->subdev.entity);
+	kfree(sensor);
+	return 0;
+}
+
+static const struct i2c_device_id mt9m032_id_table[] = {
+	{MT9M032_NAME, 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
+
+static struct i2c_driver mt9m032_i2c_driver = {
+	.driver = {
+		   .name = MT9M032_NAME,
+		   },
+	.probe = mt9m032_probe,
+	.remove = mt9m032_remove,
+	.id_table = mt9m032_id_table,
+};
+
+static int __init mt9m032_init(void)
+{
+	int rval;
+
+	rval = i2c_add_driver(&mt9m032_i2c_driver);
+	if (rval)
+		pr_err("%s: failed registering " MT9M032_NAME "\n", __func__);
+
+	return rval;
+}
+
+static void mt9m032_exit(void)
+{
+	i2c_del_driver(&mt9m032_i2c_driver);
+}
+
+module_init(mt9m032_init);
+module_exit(mt9m032_exit);
+
+MODULE_AUTHOR("Martin Hostettler");
+MODULE_DESCRIPTION("MT9M032 camera sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/video/mt9m032.h b/drivers/media/video/mt9m032.h
new file mode 100644
index 0000000..a473af4
--- /dev/null
+++ b/drivers/media/video/mt9m032.h
@@ -0,0 +1,38 @@
+/*
+ * Driver for MT9M032 CMOS Image Sensor from Micron
+ *
+ * Copyright (C) 2010-2011 Lund Engineering
+ * Contact: Gil Lund <[email protected]>
+ * Author: Martin Hostettler 
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef MT9M032_H
+#define MT9M032_H
+
+#define MT9M032_NAME		"mt9m032"
+#define MT9M032_I2C_ADDR	(0xB8 >> 1)
+
+struct mt9m032_platform_data {
+	u32 ext_clock;
+	u32 pll_pre_div;
+	u32 pll_mul;
+	u32 pll_out_div;
+	int invert_pixclock;
+
+};
+#endif /* MT9M032_H */
diff --git a/include/media/v4l2-chip-ident.h
b/include/media/v4l2-chip-ident.h
index a7194fb..7d4e5c5 100644
--- a/include/media/v4l2-chip-ident.h
+++ b/include/media/v4l2-chip-ident.h
@@ -283,6 +283,7 @@ enum {
 	/* Micron CMOS sensor chips: 45000-45099 */
 	V4L2_IDENT_MT9M001C12ST		= 45000,
 	V4L2_IDENT_MT9M001C12STM	= 45005,
+	V4L2_IDENT_MT9M032              = 45006,
 	V4L2_IDENT_MT9M111		= 45007,
 	V4L2_IDENT_MT9M112		= 45008,
 	V4L2_IDENT_MT9V022IX7ATC	= 45010, /* No way to detect "normal" I77ATx */
-- 
1.7.1
 
CD: 13ms