Added missing tegra files.HEADmaster

1 files changed, 967 insertions, 0 deletions

diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
new file mode 100644
index 00000000000..51b0fccbfe7
--- /dev/null
+++ b/drivers/media/video/mt9v022.c
@@ -0,0 +1,967 @@
+/*
+ * Driver for MT9V022 CMOS Image Sensor from Micron
+ *
+ * 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/videodev2.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/log2.h>
+
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/soc_camera.h>
+
+/*
+ * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
+ * The platform has to define ctruct i2c_board_info objects and link to them
+ * from struct soc_camera_link
+ */
+
+static char *sensor_type;
+module_param(sensor_type, charp, S_IRUGO);
+MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
+
+/* mt9v022 selected register addresses */
+#define MT9V022_CHIP_VERSION            0x00
+#define MT9V022_COLUMN_START            0x01
+#define MT9V022_ROW_START               0x02
+#define MT9V022_WINDOW_HEIGHT           0x03
+#define MT9V022_WINDOW_WIDTH            0x04
+#define MT9V022_HORIZONTAL_BLANKING     0x05
+#define MT9V022_VERTICAL_BLANKING       0x06
+#define MT9V022_CHIP_CONTROL            0x07
+#define MT9V022_SHUTTER_WIDTH1          0x08
+#define MT9V022_SHUTTER_WIDTH2          0x09
+#define MT9V022_SHUTTER_WIDTH_CTRL      0x0a
+#define MT9V022_TOTAL_SHUTTER_WIDTH     0x0b
+#define MT9V022_RESET                   0x0c
+#define MT9V022_READ_MODE               0x0d
+#define MT9V022_MONITOR_MODE            0x0e
+#define MT9V022_PIXEL_OPERATION_MODE    0x0f
+#define MT9V022_LED_OUT_CONTROL         0x1b
+#define MT9V022_ADC_MODE_CONTROL        0x1c
+#define MT9V022_ANALOG_GAIN             0x35
+#define MT9V022_BLACK_LEVEL_CALIB_CTRL  0x47
+#define MT9V022_PIXCLK_FV_LV            0x74
+#define MT9V022_DIGITAL_TEST_PATTERN    0x7f
+#define MT9V022_AEC_AGC_ENABLE          0xAF
+#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
+
+/* Progressive scan, master, defaults */
+#define MT9V022_CHIP_CONTROL_DEFAULT    0x188
+
+#define MT9V022_MAX_WIDTH               752
+#define MT9V022_MAX_HEIGHT              480
+#define MT9V022_MIN_WIDTH               48
+#define MT9V022_MIN_HEIGHT              32
+#define MT9V022_COLUMN_SKIP             1
+#define MT9V022_ROW_SKIP                4
+
+/* MT9V022 has only one fixed colorspace per pixelcode */
+struct mt9v022_datafmt {
+        enum v4l2_mbus_pixelcode        code;
+        enum v4l2_colorspace            colorspace;
+};
+
+/* Find a data format by a pixel code in an array */
+static const struct mt9v022_datafmt *mt9v022_find_datafmt(
+        enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
+        int n)
+{
+        int i;
+        for (i = 0; i < n; i++)
+                if (fmt[i].code == code)
+                        return fmt + i;
+
+        return NULL;
+}
+
+static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
+        /*
+         * Order important: first natively supported,
+         * second supported with a GPIO extender
+         */
+        {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
+        {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
+};
+
+static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
+        /* Order important - see above */
+        {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
+        {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
+};
+
+struct mt9v022 {
+        struct v4l2_subdev subdev;
+        struct v4l2_rect rect;  /* Sensor window */
+        const struct mt9v022_datafmt *fmt;
+        const struct mt9v022_datafmt *fmts;
+        int num_fmts;
+        int model;      /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
+        u16 chip_control;
+        unsigned short y_skip_top;      /* Lines to skip at the top */
+};
+
+static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
+{
+        return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
+}
+
+static int reg_read(struct i2c_client *client, const u8 reg)
+{
+        s32 data = i2c_smbus_read_word_data(client, reg);
+        return data < 0 ? data : swab16(data);
+}
+
+static int reg_write(struct i2c_client *client, const u8 reg,
+                     const u16 data)
+{
+        return i2c_smbus_write_word_data(client, reg, swab16(data));
+}
+
+static int reg_set(struct i2c_client *client, const u8 reg,
+                   const u16 data)
+{
+        int ret;
+
+        ret = reg_read(client, reg);
+        if (ret < 0)
+                return ret;
+        return reg_write(client, reg, ret | data);
+}
+
+static int reg_clear(struct i2c_client *client, const u8 reg,
+                     const u16 data)
+{
+        int ret;
+
+        ret = reg_read(client, reg);
+        if (ret < 0)
+                return ret;
+        return reg_write(client, reg, ret & ~data);
+}
+
+static int mt9v022_init(struct i2c_client *client)
+{
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        int ret;
+
+        /*
+         * Almost the default mode: master, parallel, simultaneous, and an
+         * undocumented bit 0x200, which is present in table 7, but not in 8,
+         * plus snapshot mode to disable scan for now
+         */
+        mt9v022->chip_control |= 0x10;
+        ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
+        if (!ret)
+                ret = reg_write(client, MT9V022_READ_MODE, 0x300);
+
+        /* All defaults */
+        if (!ret)
+                /* AEC, AGC on */
+                ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
+        if (!ret)
+                ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
+        if (!ret)
+                ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
+        if (!ret)
+                ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
+        if (!ret)
+                /* default - auto */
+                ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
+        if (!ret)
+                ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
+
+        return ret;
+}
+
+static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        if (enable)
+                /* Switch to master "normal" mode */
+                mt9v022->chip_control &= ~0x10;
+        else
+                /* Switch to snapshot mode */
+                mt9v022->chip_control |= 0x10;
+
+        if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
+                return -EIO;
+        return 0;
+}
+
+static int mt9v022_set_bus_param(struct soc_camera_device *icd,
+                                 unsigned long flags)
+{
+        struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
+        int ret;
+        u16 pixclk = 0;
+
+        /* Only one width bit may be set */
+        if (!is_power_of_2(width_flag))
+                return -EINVAL;
+
+        if (icl->set_bus_param) {
+                ret = icl->set_bus_param(icl, width_flag);
+                if (ret)
+                        return ret;
+        } else {
+                /*
+                 * Without board specific bus width settings we only support the
+                 * sensors native bus width
+                 */
+                if (width_flag != SOCAM_DATAWIDTH_10)
+                        return -EINVAL;
+        }
+
+        flags = soc_camera_apply_sensor_flags(icl, flags);
+
+        if (flags & SOCAM_PCLK_SAMPLE_FALLING)
+                pixclk |= 0x10;
+
+        if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
+                pixclk |= 0x1;
+
+        if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
+                pixclk |= 0x2;
+
+        ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
+        if (ret < 0)
+                return ret;
+
+        if (!(flags & SOCAM_MASTER))
+                mt9v022->chip_control &= ~0x8;
+
+        ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
+        if (ret < 0)
+                return ret;
+
+        dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
+                pixclk, mt9v022->chip_control);
+
+        return 0;
+}
+
+static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
+{
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        unsigned int flags = SOCAM_MASTER | SOCAM_SLAVE |
+                SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
+                SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
+                SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
+                SOCAM_DATA_ACTIVE_HIGH;
+
+        if (icl->query_bus_param)
+                flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
+        else
+                flags |= SOCAM_DATAWIDTH_10;
+
+        return soc_camera_apply_sensor_flags(icl, flags);
+}
+
+static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        struct v4l2_rect rect = a->c;
+        int ret;
+
+        /* Bayer format - even size lengths */
+        if (mt9v022->fmts == mt9v022_colour_fmts) {
+                rect.width      = ALIGN(rect.width, 2);
+                rect.height     = ALIGN(rect.height, 2);
+                /* Let the user play with the starting pixel */
+        }
+
+        soc_camera_limit_side(&rect.left, &rect.width,
+                     MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
+
+        soc_camera_limit_side(&rect.top, &rect.height,
+                     MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
+
+        /* Like in example app. Contradicts the datasheet though */
+        ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
+        if (ret >= 0) {
+                if (ret & 1) /* Autoexposure */
+                        ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
+                                        rect.height + mt9v022->y_skip_top + 43);
+                else
+                        ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
+                                        rect.height + mt9v022->y_skip_top + 43);
+        }
+        /* Setup frame format: defaults apart from width and height */
+        if (!ret)
+                ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
+        if (!ret)
+                ret = reg_write(client, MT9V022_ROW_START, rect.top);
+        if (!ret)
+                /*
+                 * Default 94, Phytec driver says:
+                 * "width + horizontal blank >= 660"
+                 */
+                ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
+                                rect.width > 660 - 43 ? 43 :
+                                660 - rect.width);
+        if (!ret)
+                ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
+        if (!ret)
+                ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
+        if (!ret)
+                ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
+                                rect.height + mt9v022->y_skip_top);
+
+        if (ret < 0)
+                return ret;
+
+        dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
+
+        mt9v022->rect = rect;
+
+        return 0;
+}
+
+static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        a->c    = mt9v022->rect;
+        a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+        return 0;
+}
+
+static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+        a->bounds.left                  = MT9V022_COLUMN_SKIP;
+        a->bounds.top                   = MT9V022_ROW_SKIP;
+        a->bounds.width                 = MT9V022_MAX_WIDTH;
+        a->bounds.height                = MT9V022_MAX_HEIGHT;
+        a->defrect                      = a->bounds;
+        a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        a->pixelaspect.numerator        = 1;
+        a->pixelaspect.denominator      = 1;
+
+        return 0;
+}
+
+static int mt9v022_g_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        mf->width       = mt9v022->rect.width;
+        mf->height      = mt9v022->rect.height;
+        mf->code        = mt9v022->fmt->code;
+        mf->colorspace  = mt9v022->fmt->colorspace;
+        mf->field       = V4L2_FIELD_NONE;
+
+        return 0;
+}
+
+static int mt9v022_s_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        struct v4l2_crop a = {
+                .c = {
+                        .left   = mt9v022->rect.left,
+                        .top    = mt9v022->rect.top,
+                        .width  = mf->width,
+                        .height = mf->height,
+                },
+        };
+        int ret;
+
+        /*
+         * The caller provides a supported format, as verified per call to
+         * icd->try_fmt(), datawidth is from our supported format list
+         */
+        switch (mf->code) {
+        case V4L2_MBUS_FMT_Y8_1X8:
+        case V4L2_MBUS_FMT_Y10_1X10:
+                if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
+                        return -EINVAL;
+                break;
+        case V4L2_MBUS_FMT_SBGGR8_1X8:
+        case V4L2_MBUS_FMT_SBGGR10_1X10:
+                if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
+                        return -EINVAL;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* No support for scaling on this camera, just crop. */
+        ret = mt9v022_s_crop(sd, &a);
+        if (!ret) {
+                mf->width       = mt9v022->rect.width;
+                mf->height      = mt9v022->rect.height;
+                mt9v022->fmt    = mt9v022_find_datafmt(mf->code,
+                                        mt9v022->fmts, mt9v022->num_fmts);
+                mf->colorspace  = mt9v022->fmt->colorspace;
+        }
+
+        return ret;
+}
+
+static int mt9v022_try_fmt(struct v4l2_subdev *sd,
+                           struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        const struct mt9v022_datafmt *fmt;
+        int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
+                mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
+
+        v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
+                MT9V022_MAX_WIDTH, align,
+                &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
+                MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
+
+        fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
+                                   mt9v022->num_fmts);
+        if (!fmt) {
+                fmt = mt9v022->fmt;
+                mf->code = fmt->code;
+        }
+
+        mf->colorspace  = fmt->colorspace;
+
+        return 0;
+}
+
+static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
+                                struct v4l2_dbg_chip_ident *id)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+                return -EINVAL;
+
+        if (id->match.addr != client->addr)
+                return -ENODEV;
+
+        id->ident       = mt9v022->model;
+        id->revision    = 0;
+
+        return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9v022_g_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;
+
+        reg->size = 2;
+        reg->val = reg_read(client, reg->reg);
+
+        if (reg->val > 0xffff)
+                return -EIO;
+
+        return 0;
+}
+
+static int mt9v022_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 (reg_write(client, reg->reg, reg->val) < 0)
+                return -EIO;
+
+        return 0;
+}
+#endif
+
+static const struct v4l2_queryctrl mt9v022_controls[] = {
+        {
+                .id             = V4L2_CID_VFLIP,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Flip Vertically",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 0,
+        }, {
+                .id             = V4L2_CID_HFLIP,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Flip Horizontally",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 0,
+        }, {
+                .id             = V4L2_CID_GAIN,
+                .type           = V4L2_CTRL_TYPE_INTEGER,
+                .name           = "Analog Gain",
+                .minimum        = 64,
+                .maximum        = 127,
+                .step           = 1,
+                .default_value  = 64,
+                .flags          = V4L2_CTRL_FLAG_SLIDER,
+        }, {
+                .id             = V4L2_CID_EXPOSURE,
+                .type           = V4L2_CTRL_TYPE_INTEGER,
+                .name           = "Exposure",
+                .minimum        = 1,
+                .maximum        = 255,
+                .step           = 1,
+                .default_value  = 255,
+                .flags          = V4L2_CTRL_FLAG_SLIDER,
+        }, {
+                .id             = V4L2_CID_AUTOGAIN,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Automatic Gain",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 1,
+        }, {
+                .id             = V4L2_CID_EXPOSURE_AUTO,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Automatic Exposure",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 1,
+        }
+};
+
+static struct soc_camera_ops mt9v022_ops = {
+        .set_bus_param          = mt9v022_set_bus_param,
+        .query_bus_param        = mt9v022_query_bus_param,
+        .controls               = mt9v022_controls,
+        .num_controls           = ARRAY_SIZE(mt9v022_controls),
+};
+
+static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        const struct v4l2_queryctrl *qctrl;
+        unsigned long range;
+        int data;
+
+        qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
+
+        switch (ctrl->id) {
+        case V4L2_CID_VFLIP:
+                data = reg_read(client, MT9V022_READ_MODE);
+                if (data < 0)
+                        return -EIO;
+                ctrl->value = !!(data & 0x10);
+                break;
+        case V4L2_CID_HFLIP:
+                data = reg_read(client, MT9V022_READ_MODE);
+                if (data < 0)
+                        return -EIO;
+                ctrl->value = !!(data & 0x20);
+                break;
+        case V4L2_CID_EXPOSURE_AUTO:
+                data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
+                if (data < 0)
+                        return -EIO;
+                ctrl->value = !!(data & 0x1);
+                break;
+        case V4L2_CID_AUTOGAIN:
+                data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
+                if (data < 0)
+                        return -EIO;
+                ctrl->value = !!(data & 0x2);
+                break;
+        case V4L2_CID_GAIN:
+                data = reg_read(client, MT9V022_ANALOG_GAIN);
+                if (data < 0)
+                        return -EIO;
+
+                range = qctrl->maximum - qctrl->minimum;
+                ctrl->value = ((data - 16) * range + 24) / 48 + qctrl->minimum;
+
+                break;
+        case V4L2_CID_EXPOSURE:
+                data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
+                if (data < 0)
+                        return -EIO;
+
+                range = qctrl->maximum - qctrl->minimum;
+                ctrl->value = ((data - 1) * range + 239) / 479 + qctrl->minimum;
+
+                break;
+        }
+        return 0;
+}
+
+static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        int data;
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        const struct v4l2_queryctrl *qctrl;
+
+        qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
+        if (!qctrl)
+                return -EINVAL;
+
+        switch (ctrl->id) {
+        case V4L2_CID_VFLIP:
+                if (ctrl->value)
+                        data = reg_set(client, MT9V022_READ_MODE, 0x10);
+                else
+                        data = reg_clear(client, MT9V022_READ_MODE, 0x10);
+                if (data < 0)
+                        return -EIO;
+                break;
+        case V4L2_CID_HFLIP:
+                if (ctrl->value)
+                        data = reg_set(client, MT9V022_READ_MODE, 0x20);
+                else
+                        data = reg_clear(client, MT9V022_READ_MODE, 0x20);
+                if (data < 0)
+                        return -EIO;
+                break;
+        case V4L2_CID_GAIN:
+                /* mt9v022 has minimum == default */
+                if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
+                        return -EINVAL;
+                else {
+                        unsigned long range = qctrl->maximum - qctrl->minimum;
+                        /* Valid values 16 to 64, 32 to 64 must be even. */
+                        unsigned long gain = ((ctrl->value - qctrl->minimum) *
+                                              48 + range / 2) / range + 16;
+                        if (gain >= 32)
+                                gain &= ~1;
+                        /*
+                         * The user wants to set gain manually, hope, she
+                         * knows, what she's doing... Switch AGC off.
+                         */
+
+                        if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
+                                return -EIO;
+
+                        dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
+                                reg_read(client, MT9V022_ANALOG_GAIN), gain);
+                        if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
+                                return -EIO;
+                }
+                break;
+        case V4L2_CID_EXPOSURE:
+                /* mt9v022 has maximum == default */
+                if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
+                        return -EINVAL;
+                else {
+                        unsigned long range = qctrl->maximum - qctrl->minimum;
+                        unsigned long shutter = ((ctrl->value - qctrl->minimum) *
+                                                 479 + range / 2) / range + 1;
+                        /*
+                         * The user wants to set shutter width manually, hope,
+                         * she knows, what she's doing... Switch AEC off.
+                         */
+
+                        if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
+                                return -EIO;
+
+                        dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
+                                reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
+                                shutter);
+                        if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
+                                      shutter) < 0)
+                                return -EIO;
+                }
+                break;
+        case V4L2_CID_AUTOGAIN:
+                if (ctrl->value)
+                        data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
+                else
+                        data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
+                if (data < 0)
+                        return -EIO;
+                break;
+        case V4L2_CID_EXPOSURE_AUTO:
+                if (ctrl->value)
+                        data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
+                else
+                        data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
+                if (data < 0)
+                        return -EIO;
+                break;
+        }
+        return 0;
+}
+
+/*
+ * Interface active, can use i2c. If it fails, it can indeed mean, that
+ * this wasn't our capture interface, so, we wait for the right one
+ */
+static int mt9v022_video_probe(struct soc_camera_device *icd,
+                               struct i2c_client *client)
+{
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        s32 data;
+        int ret;
+        unsigned long flags;
+
+        /* We must have a parent by now. And it cannot be a wrong one. */
+        BUG_ON(!icd->parent ||
+               to_soc_camera_host(icd->parent)->nr != icd->iface);
+
+        /* Read out the chip version register */
+        data = reg_read(client, MT9V022_CHIP_VERSION);
+
+        /* must be 0x1311 or 0x1313 */
+        if (data != 0x1311 && data != 0x1313) {
+                ret = -ENODEV;
+                dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
+                         data);
+                goto ei2c;
+        }
+
+        /* Soft reset */
+        ret = reg_write(client, MT9V022_RESET, 1);
+        if (ret < 0)
+                goto ei2c;
+        /* 15 clock cycles */
+        udelay(200);
+        if (reg_read(client, MT9V022_RESET)) {
+                dev_err(&client->dev, "Resetting MT9V022 failed!\n");
+                if (ret > 0)
+                        ret = -EIO;
+                goto ei2c;
+        }
+
+        /* Set monochrome or colour sensor type */
+        if (sensor_type && (!strcmp("colour", sensor_type) ||
+                            !strcmp("color", sensor_type))) {
+                ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
+                mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
+                mt9v022->fmts = mt9v022_colour_fmts;
+        } else {
+                ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
+                mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
+                mt9v022->fmts = mt9v022_monochrome_fmts;
+        }
+
+        if (ret < 0)
+                goto ei2c;
+
+        mt9v022->num_fmts = 0;
+
+        /*
+         * This is a 10bit sensor, so by default we only allow 10bit.
+         * The platform may support different bus widths due to
+         * different routing of the data lines.
+         */
+        if (icl->query_bus_param)
+                flags = icl->query_bus_param(icl);
+        else
+                flags = SOCAM_DATAWIDTH_10;
+
+        if (flags & SOCAM_DATAWIDTH_10)
+                mt9v022->num_fmts++;
+        else
+                mt9v022->fmts++;
+
+        if (flags & SOCAM_DATAWIDTH_8)
+                mt9v022->num_fmts++;
+
+        mt9v022->fmt = &mt9v022->fmts[0];
+
+        dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
+                 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
+                 "monochrome" : "colour");
+
+        ret = mt9v022_init(client);
+        if (ret < 0)
+                dev_err(&client->dev, "Failed to initialise the camera\n");
+
+ei2c:
+        return ret;
+}
+
+static void mt9v022_video_remove(struct soc_camera_device *icd)
+{
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+
+        dev_dbg(icd->pdev, "Video removed: %p, %p\n",
+                icd->parent, icd->vdev);
+        if (icl->free_bus)
+                icl->free_bus(icl);
+}
+
+static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        *lines = mt9v022->y_skip_top;
+
+        return 0;
+}
+
+static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
+        .g_ctrl         = mt9v022_g_ctrl,
+        .s_ctrl         = mt9v022_s_ctrl,
+        .g_chip_ident   = mt9v022_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register     = mt9v022_g_register,
+        .s_register     = mt9v022_s_register,
+#endif
+};
+
+static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+                            enum v4l2_mbus_pixelcode *code)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+        if (index >= mt9v022->num_fmts)
+                return -EINVAL;
+
+        *code = mt9v022->fmts[index].code;
+        return 0;
+}
+
+static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
+        .s_stream       = mt9v022_s_stream,
+        .s_mbus_fmt     = mt9v022_s_fmt,
+        .g_mbus_fmt     = mt9v022_g_fmt,
+        .try_mbus_fmt   = mt9v022_try_fmt,
+        .s_crop         = mt9v022_s_crop,
+        .g_crop         = mt9v022_g_crop,
+        .cropcap        = mt9v022_cropcap,
+        .enum_mbus_fmt  = mt9v022_enum_fmt,
+};
+
+static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
+        .g_skip_top_lines       = mt9v022_g_skip_top_lines,
+};
+
+static struct v4l2_subdev_ops mt9v022_subdev_ops = {
+        .core   = &mt9v022_subdev_core_ops,
+        .video  = &mt9v022_subdev_video_ops,
+        .sensor = &mt9v022_subdev_sensor_ops,
+};
+
+static int mt9v022_probe(struct i2c_client *client,
+                         const struct i2c_device_id *did)
+{
+        struct mt9v022 *mt9v022;
+        struct soc_camera_device *icd = client->dev.platform_data;
+        struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+        struct soc_camera_link *icl;
+        int ret;
+
+        if (!icd) {
+                dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
+                return -EINVAL;
+        }
+
+        icl = to_soc_camera_link(icd);
+        if (!icl) {
+                dev_err(&client->dev, "MT9V022 driver needs platform data\n");
+                return -EINVAL;
+        }
+
+        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+                dev_warn(&adapter->dev,
+                         "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+                return -EIO;
+        }
+
+        mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
+        if (!mt9v022)
+                return -ENOMEM;
+
+        v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
+
+        mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
+
+        icd->ops                = &mt9v022_ops;
+        /*
+         * MT9V022 _really_ corrupts the first read out line.
+         * TODO: verify on i.MX31
+         */
+        mt9v022->y_skip_top     = 1;
+        mt9v022->rect.left      = MT9V022_COLUMN_SKIP;
+        mt9v022->rect.top       = MT9V022_ROW_SKIP;
+        mt9v022->rect.width     = MT9V022_MAX_WIDTH;
+        mt9v022->rect.height    = MT9V022_MAX_HEIGHT;
+
+        ret = mt9v022_video_probe(icd, client);
+        if (ret) {
+                icd->ops = NULL;
+                kfree(mt9v022);
+        }
+
+        return ret;
+}
+
+static int mt9v022_remove(struct i2c_client *client)
+{
+        struct mt9v022 *mt9v022 = to_mt9v022(client);
+        struct soc_camera_device *icd = client->dev.platform_data;
+
+        icd->ops = NULL;
+        mt9v022_video_remove(icd);
+        kfree(mt9v022);
+
+        return 0;
+}
+static const struct i2c_device_id mt9v022_id[] = {
+        { "mt9v022", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9v022_id);
+
+static struct i2c_driver mt9v022_i2c_driver = {
+        .driver = {
+                .name = "mt9v022",
+        },
+        .probe          = mt9v022_probe,
+        .remove         = mt9v022_remove,
+        .id_table       = mt9v022_id,
+};
+
+static int __init mt9v022_mod_init(void)
+{
+        return i2c_add_driver(&mt9v022_i2c_driver);
+}
+
+static void __exit mt9v022_mod_exit(void)
+{
+        i2c_del_driver(&mt9v022_i2c_driver);
+}
+
+module_init(mt9v022_mod_init);
+module_exit(mt9v022_mod_exit);
+
+MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");