[media] move i2c files into drivers/media/i2c

Move ancillary I2C drivers into drivers/media/i2c, in order to
better organize them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 0 insertions, 1071 deletions

diff --git a/drivers/media/video/mt9p031.c b/drivers/media/video/mt9p031.c
deleted file mode 100644
index 3be537ef22d2..000000000000
--- a/drivers/media/video/mt9p031.c
+++ /dev/null
@@ -1,1071 +0,0 @@
-/*
- * Driver for MT9P031 CMOS Image Sensor from Aptina
- *
- * Copyright (C) 2011, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- * Copyright (C) 2011, Javier Martin <javier.martin@vista-silicon.com>
- * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
- *
- * Based on the MT9V032 driver and Bastian Hecht's code.
- *
- * 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/delay.h>
-#include <linux/device.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/log2.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/videodev2.h>
-
-#include <media/mt9p031.h>
-#include <media/v4l2-chip-ident.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-subdev.h>
-
-#include "aptina-pll.h"
-
-#define MT9P031_PIXEL_ARRAY_WIDTH			2752
-#define MT9P031_PIXEL_ARRAY_HEIGHT			2004
-
-#define MT9P031_CHIP_VERSION				0x00
-#define		MT9P031_CHIP_VERSION_VALUE		0x1801
-#define MT9P031_ROW_START				0x01
-#define		MT9P031_ROW_START_MIN			0
-#define		MT9P031_ROW_START_MAX			2004
-#define		MT9P031_ROW_START_DEF			54
-#define MT9P031_COLUMN_START				0x02
-#define		MT9P031_COLUMN_START_MIN		0
-#define		MT9P031_COLUMN_START_MAX		2750
-#define		MT9P031_COLUMN_START_DEF		16
-#define MT9P031_WINDOW_HEIGHT				0x03
-#define		MT9P031_WINDOW_HEIGHT_MIN		2
-#define		MT9P031_WINDOW_HEIGHT_MAX		2006
-#define		MT9P031_WINDOW_HEIGHT_DEF		1944
-#define MT9P031_WINDOW_WIDTH				0x04
-#define		MT9P031_WINDOW_WIDTH_MIN		2
-#define		MT9P031_WINDOW_WIDTH_MAX		2752
-#define		MT9P031_WINDOW_WIDTH_DEF		2592
-#define MT9P031_HORIZONTAL_BLANK			0x05
-#define		MT9P031_HORIZONTAL_BLANK_MIN		0
-#define		MT9P031_HORIZONTAL_BLANK_MAX		4095
-#define MT9P031_VERTICAL_BLANK				0x06
-#define		MT9P031_VERTICAL_BLANK_MIN		0
-#define		MT9P031_VERTICAL_BLANK_MAX		4095
-#define		MT9P031_VERTICAL_BLANK_DEF		25
-#define MT9P031_OUTPUT_CONTROL				0x07
-#define		MT9P031_OUTPUT_CONTROL_CEN		2
-#define		MT9P031_OUTPUT_CONTROL_SYN		1
-#define		MT9P031_OUTPUT_CONTROL_DEF		0x1f82
-#define MT9P031_SHUTTER_WIDTH_UPPER			0x08
-#define MT9P031_SHUTTER_WIDTH_LOWER			0x09
-#define		MT9P031_SHUTTER_WIDTH_MIN		1
-#define		MT9P031_SHUTTER_WIDTH_MAX		1048575
-#define		MT9P031_SHUTTER_WIDTH_DEF		1943
-#define	MT9P031_PLL_CONTROL				0x10
-#define		MT9P031_PLL_CONTROL_PWROFF		0x0050
-#define		MT9P031_PLL_CONTROL_PWRON		0x0051
-#define		MT9P031_PLL_CONTROL_USEPLL		0x0052
-#define	MT9P031_PLL_CONFIG_1				0x11
-#define	MT9P031_PLL_CONFIG_2				0x12
-#define MT9P031_PIXEL_CLOCK_CONTROL			0x0a
-#define MT9P031_FRAME_RESTART				0x0b
-#define MT9P031_SHUTTER_DELAY				0x0c
-#define MT9P031_RST					0x0d
-#define		MT9P031_RST_ENABLE			1
-#define		MT9P031_RST_DISABLE			0
-#define MT9P031_READ_MODE_1				0x1e
-#define MT9P031_READ_MODE_2				0x20
-#define		MT9P031_READ_MODE_2_ROW_MIR		(1 << 15)
-#define		MT9P031_READ_MODE_2_COL_MIR		(1 << 14)
-#define		MT9P031_READ_MODE_2_ROW_BLC		(1 << 6)
-#define MT9P031_ROW_ADDRESS_MODE			0x22
-#define MT9P031_COLUMN_ADDRESS_MODE			0x23
-#define MT9P031_GLOBAL_GAIN				0x35
-#define		MT9P031_GLOBAL_GAIN_MIN			8
-#define		MT9P031_GLOBAL_GAIN_MAX			1024
-#define		MT9P031_GLOBAL_GAIN_DEF			8
-#define		MT9P031_GLOBAL_GAIN_MULT		(1 << 6)
-#define MT9P031_ROW_BLACK_TARGET			0x49
-#define MT9P031_ROW_BLACK_DEF_OFFSET			0x4b
-#define MT9P031_GREEN1_OFFSET				0x60
-#define MT9P031_GREEN2_OFFSET				0x61
-#define MT9P031_BLACK_LEVEL_CALIBRATION			0x62
-#define		MT9P031_BLC_MANUAL_BLC			(1 << 0)
-#define MT9P031_RED_OFFSET				0x63
-#define MT9P031_BLUE_OFFSET				0x64
-#define MT9P031_TEST_PATTERN				0xa0
-#define		MT9P031_TEST_PATTERN_SHIFT		3
-#define		MT9P031_TEST_PATTERN_ENABLE		(1 << 0)
-#define		MT9P031_TEST_PATTERN_DISABLE		(0 << 0)
-#define MT9P031_TEST_PATTERN_GREEN			0xa1
-#define MT9P031_TEST_PATTERN_RED			0xa2
-#define MT9P031_TEST_PATTERN_BLUE			0xa3
-
-enum mt9p031_model {
-	MT9P031_MODEL_COLOR,
-	MT9P031_MODEL_MONOCHROME,
-};
-
-struct mt9p031 {
-	struct v4l2_subdev subdev;
-	struct media_pad pad;
-	struct v4l2_rect crop;  /* Sensor window */
-	struct v4l2_mbus_framefmt format;
-	struct mt9p031_platform_data *pdata;
-	struct mutex power_lock; /* lock to protect power_count */
-	int power_count;
-
-	enum mt9p031_model model;
-	struct aptina_pll pll;
-	int reset;
-
-	struct v4l2_ctrl_handler ctrls;
-	struct v4l2_ctrl *blc_auto;
-	struct v4l2_ctrl *blc_offset;
-
-	/* Registers cache */
-	u16 output_control;
-	u16 mode2;
-};
-
-static struct mt9p031 *to_mt9p031(struct v4l2_subdev *sd)
-{
-	return container_of(sd, struct mt9p031, subdev);
-}
-
-static int mt9p031_read(struct i2c_client *client, u8 reg)
-{
-	return i2c_smbus_read_word_swapped(client, reg);
-}
-
-static int mt9p031_write(struct i2c_client *client, u8 reg, u16 data)
-{
-	return i2c_smbus_write_word_swapped(client, reg, data);
-}
-
-static int mt9p031_set_output_control(struct mt9p031 *mt9p031, u16 clear,
-				      u16 set)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	u16 value = (mt9p031->output_control & ~clear) | set;
-	int ret;
-
-	ret = mt9p031_write(client, MT9P031_OUTPUT_CONTROL, value);
-	if (ret < 0)
-		return ret;
-
-	mt9p031->output_control = value;
-	return 0;
-}
-
-static int mt9p031_set_mode2(struct mt9p031 *mt9p031, u16 clear, u16 set)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	u16 value = (mt9p031->mode2 & ~clear) | set;
-	int ret;
-
-	ret = mt9p031_write(client, MT9P031_READ_MODE_2, value);
-	if (ret < 0)
-		return ret;
-
-	mt9p031->mode2 = value;
-	return 0;
-}
-
-static int mt9p031_reset(struct mt9p031 *mt9p031)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	int ret;
-
-	/* Disable chip output, synchronous option update */
-	ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_ENABLE);
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_DISABLE);
-	if (ret < 0)
-		return ret;
-
-	return mt9p031_set_output_control(mt9p031, MT9P031_OUTPUT_CONTROL_CEN,
-					  0);
-}
-
-static int mt9p031_pll_setup(struct mt9p031 *mt9p031)
-{
-	static const struct aptina_pll_limits limits = {
-		.ext_clock_min = 6000000,
-		.ext_clock_max = 27000000,
-		.int_clock_min = 2000000,
-		.int_clock_max = 13500000,
-		.out_clock_min = 180000000,
-		.out_clock_max = 360000000,
-		.pix_clock_max = 96000000,
-		.n_min = 1,
-		.n_max = 64,
-		.m_min = 16,
-		.m_max = 255,
-		.p1_min = 1,
-		.p1_max = 128,
-	};
-
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	struct mt9p031_platform_data *pdata = mt9p031->pdata;
-
-	mt9p031->pll.ext_clock = pdata->ext_freq;
-	mt9p031->pll.pix_clock = pdata->target_freq;
-
-	return aptina_pll_calculate(&client->dev, &limits, &mt9p031->pll);
-}
-
-static int mt9p031_pll_enable(struct mt9p031 *mt9p031)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	int ret;
-
-	ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
-			    MT9P031_PLL_CONTROL_PWRON);
-	if (ret < 0)
-		return ret;
-
-	ret = mt9p031_write(client, MT9P031_PLL_CONFIG_1,
-			    (mt9p031->pll.m << 8) | (mt9p031->pll.n - 1));
-	if (ret < 0)
-		return ret;
-
-	ret = mt9p031_write(client, MT9P031_PLL_CONFIG_2, mt9p031->pll.p1 - 1);
-	if (ret < 0)
-		return ret;
-
-	usleep_range(1000, 2000);
-	ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
-			    MT9P031_PLL_CONTROL_PWRON |
-			    MT9P031_PLL_CONTROL_USEPLL);
-	return ret;
-}
-
-static inline int mt9p031_pll_disable(struct mt9p031 *mt9p031)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-
-	return mt9p031_write(client, MT9P031_PLL_CONTROL,
-			     MT9P031_PLL_CONTROL_PWROFF);
-}
-
-static int mt9p031_power_on(struct mt9p031 *mt9p031)
-{
-	/* Ensure RESET_BAR is low */
-	if (mt9p031->reset != -1) {
-		gpio_set_value(mt9p031->reset, 0);
-		usleep_range(1000, 2000);
-	}
-
-	/* Emable clock */
-	if (mt9p031->pdata->set_xclk)
-		mt9p031->pdata->set_xclk(&mt9p031->subdev,
-					 mt9p031->pdata->ext_freq);
-
-	/* Now RESET_BAR must be high */
-	if (mt9p031->reset != -1) {
-		gpio_set_value(mt9p031->reset, 1);
-		usleep_range(1000, 2000);
-	}
-
-	return 0;
-}
-
-static void mt9p031_power_off(struct mt9p031 *mt9p031)
-{
-	if (mt9p031->reset != -1) {
-		gpio_set_value(mt9p031->reset, 0);
-		usleep_range(1000, 2000);
-	}
-
-	if (mt9p031->pdata->set_xclk)
-		mt9p031->pdata->set_xclk(&mt9p031->subdev, 0);
-}
-
-static int __mt9p031_set_power(struct mt9p031 *mt9p031, bool on)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	int ret;
-
-	if (!on) {
-		mt9p031_power_off(mt9p031);
-		return 0;
-	}
-
-	ret = mt9p031_power_on(mt9p031);
-	if (ret < 0)
-		return ret;
-
-	ret = mt9p031_reset(mt9p031);
-	if (ret < 0) {
-		dev_err(&client->dev, "Failed to reset the camera\n");
-		return ret;
-	}
-
-	return v4l2_ctrl_handler_setup(&mt9p031->ctrls);
-}
-
-/* -----------------------------------------------------------------------------
- * V4L2 subdev video operations
- */
-
-static int mt9p031_set_params(struct mt9p031 *mt9p031)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	struct v4l2_mbus_framefmt *format = &mt9p031->format;
-	const struct v4l2_rect *crop = &mt9p031->crop;
-	unsigned int hblank;
-	unsigned int vblank;
-	unsigned int xskip;
-	unsigned int yskip;
-	unsigned int xbin;
-	unsigned int ybin;
-	int ret;
-
-	/* Windows position and size.
-	 *
-	 * TODO: Make sure the start coordinates and window size match the
-	 * skipping, binning and mirroring (see description of registers 2 and 4
-	 * in table 13, and Binning section on page 41).
-	 */
-	ret = mt9p031_write(client, MT9P031_COLUMN_START, crop->left);
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_ROW_START, crop->top);
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_WINDOW_WIDTH, crop->width - 1);
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_WINDOW_HEIGHT, crop->height - 1);
-	if (ret < 0)
-		return ret;
-
-	/* Row and column binning and skipping. Use the maximum binning value
-	 * compatible with the skipping settings.
-	 */
-	xskip = DIV_ROUND_CLOSEST(crop->width, format->width);
-	yskip = DIV_ROUND_CLOSEST(crop->height, format->height);
-	xbin = 1 << (ffs(xskip) - 1);
-	ybin = 1 << (ffs(yskip) - 1);
-
-	ret = mt9p031_write(client, MT9P031_COLUMN_ADDRESS_MODE,
-			    ((xbin - 1) << 4) | (xskip - 1));
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_ROW_ADDRESS_MODE,
-			    ((ybin - 1) << 4) | (yskip - 1));
-	if (ret < 0)
-		return ret;
-
-	/* Blanking - use minimum value for horizontal blanking and default
-	 * value for vertical blanking.
-	 */
-	hblank = 346 * ybin + 64 + (80 >> max_t(unsigned int, xbin, 3));
-	vblank = MT9P031_VERTICAL_BLANK_DEF;
-
-	ret = mt9p031_write(client, MT9P031_HORIZONTAL_BLANK, hblank);
-	if (ret < 0)
-		return ret;
-	ret = mt9p031_write(client, MT9P031_VERTICAL_BLANK, vblank);
-	if (ret < 0)
-		return ret;
-
-	return ret;
-}
-
-static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	int ret;
-
-	if (!enable) {
-		/* Stop sensor readout */
-		ret = mt9p031_set_output_control(mt9p031,
-						 MT9P031_OUTPUT_CONTROL_CEN, 0);
-		if (ret < 0)
-			return ret;
-
-		return mt9p031_pll_disable(mt9p031);
-	}
-
-	ret = mt9p031_set_params(mt9p031);
-	if (ret < 0)
-		return ret;
-
-	/* Switch to master "normal" mode */
-	ret = mt9p031_set_output_control(mt9p031, 0,
-					 MT9P031_OUTPUT_CONTROL_CEN);
-	if (ret < 0)
-		return ret;
-
-	return mt9p031_pll_enable(mt9p031);
-}
-
-static int mt9p031_enum_mbus_code(struct v4l2_subdev *subdev,
-				  struct v4l2_subdev_fh *fh,
-				  struct v4l2_subdev_mbus_code_enum *code)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-
-	if (code->pad || code->index)
-		return -EINVAL;
-
-	code->code = mt9p031->format.code;
-	return 0;
-}
-
-static int mt9p031_enum_frame_size(struct v4l2_subdev *subdev,
-				   struct v4l2_subdev_fh *fh,
-				   struct v4l2_subdev_frame_size_enum *fse)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-
-	if (fse->index >= 8 || fse->code != mt9p031->format.code)
-		return -EINVAL;
-
-	fse->min_width = MT9P031_WINDOW_WIDTH_DEF
-		       / min_t(unsigned int, 7, fse->index + 1);
-	fse->max_width = fse->min_width;
-	fse->min_height = MT9P031_WINDOW_HEIGHT_DEF / (fse->index + 1);
-	fse->max_height = fse->min_height;
-
-	return 0;
-}
-
-static struct v4l2_mbus_framefmt *
-__mt9p031_get_pad_format(struct mt9p031 *mt9p031, struct v4l2_subdev_fh *fh,
-			 unsigned int pad, u32 which)
-{
-	switch (which) {
-	case V4L2_SUBDEV_FORMAT_TRY:
-		return v4l2_subdev_get_try_format(fh, pad);
-	case V4L2_SUBDEV_FORMAT_ACTIVE:
-		return &mt9p031->format;
-	default:
-		return NULL;
-	}
-}
-
-static struct v4l2_rect *
-__mt9p031_get_pad_crop(struct mt9p031 *mt9p031, struct v4l2_subdev_fh *fh,
-		     unsigned int pad, u32 which)
-{
-	switch (which) {
-	case V4L2_SUBDEV_FORMAT_TRY:
-		return v4l2_subdev_get_try_crop(fh, pad);
-	case V4L2_SUBDEV_FORMAT_ACTIVE:
-		return &mt9p031->crop;
-	default:
-		return NULL;
-	}
-}
-
-static int mt9p031_get_format(struct v4l2_subdev *subdev,
-			      struct v4l2_subdev_fh *fh,
-			      struct v4l2_subdev_format *fmt)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-
-	fmt->format = *__mt9p031_get_pad_format(mt9p031, fh, fmt->pad,
-						fmt->which);
-	return 0;
-}
-
-static int mt9p031_set_format(struct v4l2_subdev *subdev,
-			      struct v4l2_subdev_fh *fh,
-			      struct v4l2_subdev_format *format)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	struct v4l2_mbus_framefmt *__format;
-	struct v4l2_rect *__crop;
-	unsigned int width;
-	unsigned int height;
-	unsigned int hratio;
-	unsigned int vratio;
-
-	__crop = __mt9p031_get_pad_crop(mt9p031, fh, format->pad,
-					format->which);
-
-	/* Clamp the width and height to avoid dividing by zero. */
-	width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
-			max(__crop->width / 7, MT9P031_WINDOW_WIDTH_MIN),
-			__crop->width);
-	height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
-			max(__crop->height / 8, MT9P031_WINDOW_HEIGHT_MIN),
-			__crop->height);
-
-	hratio = DIV_ROUND_CLOSEST(__crop->width, width);
-	vratio = DIV_ROUND_CLOSEST(__crop->height, height);
-
-	__format = __mt9p031_get_pad_format(mt9p031, fh, format->pad,
-					    format->which);
-	__format->width = __crop->width / hratio;
-	__format->height = __crop->height / vratio;
-
-	format->format = *__format;
-
-	return 0;
-}
-
-static int mt9p031_get_crop(struct v4l2_subdev *subdev,
-			    struct v4l2_subdev_fh *fh,
-			    struct v4l2_subdev_crop *crop)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-
-	crop->rect = *__mt9p031_get_pad_crop(mt9p031, fh, crop->pad,
-					     crop->which);
-	return 0;
-}
-
-static int mt9p031_set_crop(struct v4l2_subdev *subdev,
-			    struct v4l2_subdev_fh *fh,
-			    struct v4l2_subdev_crop *crop)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	struct v4l2_mbus_framefmt *__format;
-	struct v4l2_rect *__crop;
-	struct v4l2_rect rect;
-
-	/* Clamp the crop rectangle boundaries and align them to a multiple of 2
-	 * pixels to ensure a GRBG Bayer pattern.
-	 */
-	rect.left = clamp(ALIGN(crop->rect.left, 2), MT9P031_COLUMN_START_MIN,
-			  MT9P031_COLUMN_START_MAX);
-	rect.top = clamp(ALIGN(crop->rect.top, 2), MT9P031_ROW_START_MIN,
-			 MT9P031_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2),
-			   MT9P031_WINDOW_WIDTH_MIN,
-			   MT9P031_WINDOW_WIDTH_MAX);
-	rect.height = clamp(ALIGN(crop->rect.height, 2),
-			    MT9P031_WINDOW_HEIGHT_MIN,
-			    MT9P031_WINDOW_HEIGHT_MAX);
-
-	rect.width = min(rect.width, MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
-
-	__crop = __mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which);
-
-	if (rect.width != __crop->width || rect.height != __crop->height) {
-		/* Reset the output image size if the crop rectangle size has
-		 * been modified.
-		 */
-		__format = __mt9p031_get_pad_format(mt9p031, fh, crop->pad,
-						    crop->which);
-		__format->width = rect.width;
-		__format->height = rect.height;
-	}
-
-	*__crop = rect;
-	crop->rect = rect;
-
-	return 0;
-}
-
-/* -----------------------------------------------------------------------------
- * V4L2 subdev control operations
- */
-
-#define V4L2_CID_TEST_PATTERN		(V4L2_CID_USER_BASE | 0x1001)
-#define V4L2_CID_BLC_AUTO		(V4L2_CID_USER_BASE | 0x1002)
-#define V4L2_CID_BLC_TARGET_LEVEL	(V4L2_CID_USER_BASE | 0x1003)
-#define V4L2_CID_BLC_ANALOG_OFFSET	(V4L2_CID_USER_BASE | 0x1004)
-#define V4L2_CID_BLC_DIGITAL_OFFSET	(V4L2_CID_USER_BASE | 0x1005)
-
-static int mt9p031_s_ctrl(struct v4l2_ctrl *ctrl)
-{
-	struct mt9p031 *mt9p031 =
-			container_of(ctrl->handler, struct mt9p031, ctrls);
-	struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
-	u16 data;
-	int ret;
-
-	switch (ctrl->id) {
-	case V4L2_CID_EXPOSURE:
-		ret = mt9p031_write(client, MT9P031_SHUTTER_WIDTH_UPPER,
-				    (ctrl->val >> 16) & 0xffff);
-		if (ret < 0)
-			return ret;
-
-		return mt9p031_write(client, MT9P031_SHUTTER_WIDTH_LOWER,
-				     ctrl->val & 0xffff);
-
-	case V4L2_CID_GAIN:
-		/* Gain is controlled by 2 analog stages and a digital stage.
-		 * Valid values for the 3 stages are
-		 *
-		 * Stage                Min     Max     Step
-		 * ------------------------------------------
-		 * First analog stage   x1      x2      1
-		 * Second analog stage  x1      x4      0.125
-		 * Digital stage        x1      x16     0.125
-		 *
-		 * To minimize noise, the gain stages should be used in the
-		 * second analog stage, first analog stage, digital stage order.
-		 * Gain from a previous stage should be pushed to its maximum
-		 * value before the next stage is used.
-		 */
-		if (ctrl->val <= 32) {
-			data = ctrl->val;
-		} else if (ctrl->val <= 64) {
-			ctrl->val &= ~1;
-			data = (1 << 6) | (ctrl->val >> 1);
-		} else {
-			ctrl->val &= ~7;
-			data = ((ctrl->val - 64) << 5) | (1 << 6) | 32;
-		}
-
-		return mt9p031_write(client, MT9P031_GLOBAL_GAIN, data);
-
-	case V4L2_CID_HFLIP:
-		if (ctrl->val)
-			return mt9p031_set_mode2(mt9p031,
-					0, MT9P031_READ_MODE_2_COL_MIR);
-		else
-			return mt9p031_set_mode2(mt9p031,
-					MT9P031_READ_MODE_2_COL_MIR, 0);
-
-	case V4L2_CID_VFLIP:
-		if (ctrl->val)
-			return mt9p031_set_mode2(mt9p031,
-					0, MT9P031_READ_MODE_2_ROW_MIR);
-		else
-			return mt9p031_set_mode2(mt9p031,
-					MT9P031_READ_MODE_2_ROW_MIR, 0);
-
-	case V4L2_CID_TEST_PATTERN:
-		if (!ctrl->val) {
-			/* Restore the black level compensation settings. */
-			if (mt9p031->blc_auto->cur.val != 0) {
-				ret = mt9p031_s_ctrl(mt9p031->blc_auto);
-				if (ret < 0)
-					return ret;
-			}
-			if (mt9p031->blc_offset->cur.val != 0) {
-				ret = mt9p031_s_ctrl(mt9p031->blc_offset);
-				if (ret < 0)
-					return ret;
-			}
-			return mt9p031_write(client, MT9P031_TEST_PATTERN,
-					     MT9P031_TEST_PATTERN_DISABLE);
-		}
-
-		ret = mt9p031_write(client, MT9P031_TEST_PATTERN_GREEN, 0x05a0);
-		if (ret < 0)
-			return ret;
-		ret = mt9p031_write(client, MT9P031_TEST_PATTERN_RED, 0x0a50);
-		if (ret < 0)
-			return ret;
-		ret = mt9p031_write(client, MT9P031_TEST_PATTERN_BLUE, 0x0aa0);
-		if (ret < 0)
-			return ret;
-
-		/* Disable digital black level compensation when using a test
-		 * pattern.
-		 */
-		ret = mt9p031_set_mode2(mt9p031, MT9P031_READ_MODE_2_ROW_BLC,
-					0);
-		if (ret < 0)
-			return ret;
-
-		ret = mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET, 0);
-		if (ret < 0)
-			return ret;
-
-		return mt9p031_write(client, MT9P031_TEST_PATTERN,
-				((ctrl->val - 1) << MT9P031_TEST_PATTERN_SHIFT)
-				| MT9P031_TEST_PATTERN_ENABLE);
-
-	case V4L2_CID_BLC_AUTO:
-		ret = mt9p031_set_mode2(mt9p031,
-				ctrl->val ? 0 : MT9P031_READ_MODE_2_ROW_BLC,
-				ctrl->val ? MT9P031_READ_MODE_2_ROW_BLC : 0);
-		if (ret < 0)
-			return ret;
-
-		return mt9p031_write(client, MT9P031_BLACK_LEVEL_CALIBRATION,
-				     ctrl->val ? 0 : MT9P031_BLC_MANUAL_BLC);
-
-	case V4L2_CID_BLC_TARGET_LEVEL:
-		return mt9p031_write(client, MT9P031_ROW_BLACK_TARGET,
-				     ctrl->val);
-
-	case V4L2_CID_BLC_ANALOG_OFFSET:
-		data = ctrl->val & ((1 << 9) - 1);
-
-		ret = mt9p031_write(client, MT9P031_GREEN1_OFFSET, data);
-		if (ret < 0)
-			return ret;
-		ret = mt9p031_write(client, MT9P031_GREEN2_OFFSET, data);
-		if (ret < 0)
-			return ret;
-		ret = mt9p031_write(client, MT9P031_RED_OFFSET, data);
-		if (ret < 0)
-			return ret;
-		return mt9p031_write(client, MT9P031_BLUE_OFFSET, data);
-
-	case V4L2_CID_BLC_DIGITAL_OFFSET:
-		return mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET,
-				     ctrl->val & ((1 << 12) - 1));
-	}
-
-	return 0;
-}
-
-static struct v4l2_ctrl_ops mt9p031_ctrl_ops = {
-	.s_ctrl = mt9p031_s_ctrl,
-};
-
-static const char * const mt9p031_test_pattern_menu[] = {
-	"Disabled",
-	"Color Field",
-	"Horizontal Gradient",
-	"Vertical Gradient",
-	"Diagonal Gradient",
-	"Classic Test Pattern",
-	"Walking 1s",
-	"Monochrome Horizontal Bars",
-	"Monochrome Vertical Bars",
-	"Vertical Color Bars",
-};
-
-static const struct v4l2_ctrl_config mt9p031_ctrls[] = {
-	{
-		.ops		= &mt9p031_ctrl_ops,
-		.id		= V4L2_CID_TEST_PATTERN,
-		.type		= V4L2_CTRL_TYPE_MENU,
-		.name		= "Test Pattern",
-		.min		= 0,
-		.max		= ARRAY_SIZE(mt9p031_test_pattern_menu) - 1,
-		.step		= 0,
-		.def		= 0,
-		.flags		= 0,
-		.menu_skip_mask	= 0,
-		.qmenu		= mt9p031_test_pattern_menu,
-	}, {
-		.ops		= &mt9p031_ctrl_ops,
-		.id		= V4L2_CID_BLC_AUTO,
-		.type		= V4L2_CTRL_TYPE_BOOLEAN,
-		.name		= "BLC, Auto",
-		.min		= 0,
-		.max		= 1,
-		.step		= 1,
-		.def		= 1,
-		.flags		= 0,
-	}, {
-		.ops		= &mt9p031_ctrl_ops,
-		.id		= V4L2_CID_BLC_TARGET_LEVEL,
-		.type		= V4L2_CTRL_TYPE_INTEGER,
-		.name		= "BLC Target Level",
-		.min		= 0,
-		.max		= 4095,
-		.step		= 1,
-		.def		= 168,
-		.flags		= 0,
-	}, {
-		.ops		= &mt9p031_ctrl_ops,
-		.id		= V4L2_CID_BLC_ANALOG_OFFSET,
-		.type		= V4L2_CTRL_TYPE_INTEGER,
-		.name		= "BLC Analog Offset",
-		.min		= -255,
-		.max		= 255,
-		.step		= 1,
-		.def		= 32,
-		.flags		= 0,
-	}, {
-		.ops		= &mt9p031_ctrl_ops,
-		.id		= V4L2_CID_BLC_DIGITAL_OFFSET,
-		.type		= V4L2_CTRL_TYPE_INTEGER,
-		.name		= "BLC Digital Offset",
-		.min		= -2048,
-		.max		= 2047,
-		.step		= 1,
-		.def		= 40,
-		.flags		= 0,
-	}
-};
-
-/* -----------------------------------------------------------------------------
- * V4L2 subdev core operations
- */
-
-static int mt9p031_set_power(struct v4l2_subdev *subdev, int on)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	int ret = 0;
-
-	mutex_lock(&mt9p031->power_lock);
-
-	/* If the power count is modified from 0 to != 0 or from != 0 to 0,
-	 * update the power state.
-	 */
-	if (mt9p031->power_count == !on) {
-		ret = __mt9p031_set_power(mt9p031, !!on);
-		if (ret < 0)
-			goto out;
-	}
-
-	/* Update the power count. */
-	mt9p031->power_count += on ? 1 : -1;
-	WARN_ON(mt9p031->power_count < 0);
-
-out:
-	mutex_unlock(&mt9p031->power_lock);
-	return ret;
-}
-
-/* -----------------------------------------------------------------------------
- * V4L2 subdev internal operations
- */
-
-static int mt9p031_registered(struct v4l2_subdev *subdev)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(subdev);
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	s32 data;
-	int ret;
-
-	ret = mt9p031_power_on(mt9p031);
-	if (ret < 0) {
-		dev_err(&client->dev, "MT9P031 power up failed\n");
-		return ret;
-	}
-
-	/* Read out the chip version register */
-	data = mt9p031_read(client, MT9P031_CHIP_VERSION);
-	if (data != MT9P031_CHIP_VERSION_VALUE) {
-		dev_err(&client->dev, "MT9P031 not detected, wrong version "
-			"0x%04x\n", data);
-		return -ENODEV;
-	}
-
-	mt9p031_power_off(mt9p031);
-
-	dev_info(&client->dev, "MT9P031 detected at address 0x%02x\n",
-		 client->addr);
-
-	return ret;
-}
-
-static int mt9p031_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
-{
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-	struct v4l2_mbus_framefmt *format;
-	struct v4l2_rect *crop;
-
-	crop = v4l2_subdev_get_try_crop(fh, 0);
-	crop->left = MT9P031_COLUMN_START_DEF;
-	crop->top = MT9P031_ROW_START_DEF;
-	crop->width = MT9P031_WINDOW_WIDTH_DEF;
-	crop->height = MT9P031_WINDOW_HEIGHT_DEF;
-
-	format = v4l2_subdev_get_try_format(fh, 0);
-
-	if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
-		format->code = V4L2_MBUS_FMT_Y12_1X12;
-	else
-		format->code = V4L2_MBUS_FMT_SGRBG12_1X12;
-
-	format->width = MT9P031_WINDOW_WIDTH_DEF;
-	format->height = MT9P031_WINDOW_HEIGHT_DEF;
-	format->field = V4L2_FIELD_NONE;
-	format->colorspace = V4L2_COLORSPACE_SRGB;
-
-	return mt9p031_set_power(subdev, 1);
-}
-
-static int mt9p031_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
-{
-	return mt9p031_set_power(subdev, 0);
-}
-
-static struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = {
-	.s_power        = mt9p031_set_power,
-};
-
-static struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = {
-	.s_stream       = mt9p031_s_stream,
-};
-
-static struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
-	.enum_mbus_code = mt9p031_enum_mbus_code,
-	.enum_frame_size = mt9p031_enum_frame_size,
-	.get_fmt = mt9p031_get_format,
-	.set_fmt = mt9p031_set_format,
-	.get_crop = mt9p031_get_crop,
-	.set_crop = mt9p031_set_crop,
-};
-
-static struct v4l2_subdev_ops mt9p031_subdev_ops = {
-	.core   = &mt9p031_subdev_core_ops,
-	.video  = &mt9p031_subdev_video_ops,
-	.pad    = &mt9p031_subdev_pad_ops,
-};
-
-static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = {
-	.registered = mt9p031_registered,
-	.open = mt9p031_open,
-	.close = mt9p031_close,
-};
-
-/* -----------------------------------------------------------------------------
- * Driver initialization and probing
- */
-
-static int mt9p031_probe(struct i2c_client *client,
-			 const struct i2c_device_id *did)
-{
-	struct mt9p031_platform_data *pdata = client->dev.platform_data;
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
-	struct mt9p031 *mt9p031;
-	unsigned int i;
-	int ret;
-
-	if (pdata == NULL) {
-		dev_err(&client->dev, "No platform data\n");
-		return -EINVAL;
-	}
-
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
-		dev_warn(&client->dev,
-			"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
-		return -EIO;
-	}
-
-	mt9p031 = kzalloc(sizeof(*mt9p031), GFP_KERNEL);
-	if (mt9p031 == NULL)
-		return -ENOMEM;
-
-	mt9p031->pdata = pdata;
-	mt9p031->output_control	= MT9P031_OUTPUT_CONTROL_DEF;
-	mt9p031->mode2 = MT9P031_READ_MODE_2_ROW_BLC;
-	mt9p031->model = did->driver_data;
-	mt9p031->reset = -1;
-
-	v4l2_ctrl_handler_init(&mt9p031->ctrls, ARRAY_SIZE(mt9p031_ctrls) + 5);
-
-	v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
-			  V4L2_CID_EXPOSURE, MT9P031_SHUTTER_WIDTH_MIN,
-			  MT9P031_SHUTTER_WIDTH_MAX, 1,
-			  MT9P031_SHUTTER_WIDTH_DEF);
-	v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
-			  V4L2_CID_GAIN, MT9P031_GLOBAL_GAIN_MIN,
-			  MT9P031_GLOBAL_GAIN_MAX, 1, MT9P031_GLOBAL_GAIN_DEF);
-	v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
-			  V4L2_CID_HFLIP, 0, 1, 1, 0);
-	v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
-			  V4L2_CID_VFLIP, 0, 1, 1, 0);
-	v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
-			  V4L2_CID_PIXEL_RATE, pdata->target_freq,
-			  pdata->target_freq, 1, pdata->target_freq);
-
-	for (i = 0; i < ARRAY_SIZE(mt9p031_ctrls); ++i)
-		v4l2_ctrl_new_custom(&mt9p031->ctrls, &mt9p031_ctrls[i], NULL);
-
-	mt9p031->subdev.ctrl_handler = &mt9p031->ctrls;
-
-	if (mt9p031->ctrls.error) {
-		printk(KERN_INFO "%s: control initialization error %d\n",
-		       __func__, mt9p031->ctrls.error);
-		ret = mt9p031->ctrls.error;
-		goto done;
-	}
-
-	mt9p031->blc_auto = v4l2_ctrl_find(&mt9p031->ctrls, V4L2_CID_BLC_AUTO);
-	mt9p031->blc_offset = v4l2_ctrl_find(&mt9p031->ctrls,
-					     V4L2_CID_BLC_DIGITAL_OFFSET);
-
-	mutex_init(&mt9p031->power_lock);
-	v4l2_i2c_subdev_init(&mt9p031->subdev, client, &mt9p031_subdev_ops);
-	mt9p031->subdev.internal_ops = &mt9p031_subdev_internal_ops;
-
-	mt9p031->pad.flags = MEDIA_PAD_FL_SOURCE;
-	ret = media_entity_init(&mt9p031->subdev.entity, 1, &mt9p031->pad, 0);
-	if (ret < 0)
-		goto done;
-
-	mt9p031->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
-
-	mt9p031->crop.width = MT9P031_WINDOW_WIDTH_DEF;
-	mt9p031->crop.height = MT9P031_WINDOW_HEIGHT_DEF;
-	mt9p031->crop.left = MT9P031_COLUMN_START_DEF;
-	mt9p031->crop.top = MT9P031_ROW_START_DEF;
-
-	if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
-		mt9p031->format.code = V4L2_MBUS_FMT_Y12_1X12;
-	else
-		mt9p031->format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
-
-	mt9p031->format.width = MT9P031_WINDOW_WIDTH_DEF;
-	mt9p031->format.height = MT9P031_WINDOW_HEIGHT_DEF;
-	mt9p031->format.field = V4L2_FIELD_NONE;
-	mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB;
-
-	if (pdata->reset != -1) {
-		ret = gpio_request_one(pdata->reset, GPIOF_OUT_INIT_LOW,
-				       "mt9p031_rst");
-		if (ret < 0)
-			goto done;
-
-		mt9p031->reset = pdata->reset;
-	}
-
-	ret = mt9p031_pll_setup(mt9p031);
-
-done:
-	if (ret < 0) {
-		if (mt9p031->reset != -1)
-			gpio_free(mt9p031->reset);
-
-		v4l2_ctrl_handler_free(&mt9p031->ctrls);
-		media_entity_cleanup(&mt9p031->subdev.entity);
-		kfree(mt9p031);
-	}
-
-	return ret;
-}
-
-static int mt9p031_remove(struct i2c_client *client)
-{
-	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
-	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
-
-	v4l2_ctrl_handler_free(&mt9p031->ctrls);
-	v4l2_device_unregister_subdev(subdev);
-	media_entity_cleanup(&subdev->entity);
-	if (mt9p031->reset != -1)
-		gpio_free(mt9p031->reset);
-	kfree(mt9p031);
-
-	return 0;
-}
-
-static const struct i2c_device_id mt9p031_id[] = {
-	{ "mt9p031", MT9P031_MODEL_COLOR },
-	{ "mt9p031m", MT9P031_MODEL_MONOCHROME },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, mt9p031_id);
-
-static struct i2c_driver mt9p031_i2c_driver = {
-	.driver = {
-		.name = "mt9p031",
-	},
-	.probe          = mt9p031_probe,
-	.remove         = mt9p031_remove,
-	.id_table       = mt9p031_id,
-};
-
-module_i2c_driver(mt9p031_i2c_driver);
-
-MODULE_DESCRIPTION("Aptina MT9P031 Camera driver");
-MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
-MODULE_LICENSE("GPL v2");