Added missing tegra files.HEADmaster

1 files changed, 832 insertions, 0 deletions

diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
new file mode 100644
index 00000000000..4da9cca939c
--- /dev/null
+++ b/drivers/media/video/mt9m001.c
@@ -0,0 +1,832 @@
+/*
+ * Driver for MT9M001 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/log2.h>
+
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/soc_camera.h>
+
+/*
+ * mt9m001 i2c address 0x5d
+ * The platform has to define ctruct i2c_board_info objects and link to them
+ * from struct soc_camera_link
+ */
+
+/* mt9m001 selected register addresses */
+#define MT9M001_CHIP_VERSION            0x00
+#define MT9M001_ROW_START               0x01
+#define MT9M001_COLUMN_START            0x02
+#define MT9M001_WINDOW_HEIGHT           0x03
+#define MT9M001_WINDOW_WIDTH            0x04
+#define MT9M001_HORIZONTAL_BLANKING     0x05
+#define MT9M001_VERTICAL_BLANKING       0x06
+#define MT9M001_OUTPUT_CONTROL          0x07
+#define MT9M001_SHUTTER_WIDTH           0x09
+#define MT9M001_FRAME_RESTART           0x0b
+#define MT9M001_SHUTTER_DELAY           0x0c
+#define MT9M001_RESET                   0x0d
+#define MT9M001_READ_OPTIONS1           0x1e
+#define MT9M001_READ_OPTIONS2           0x20
+#define MT9M001_GLOBAL_GAIN             0x35
+#define MT9M001_CHIP_ENABLE             0xF1
+
+#define MT9M001_MAX_WIDTH               1280
+#define MT9M001_MAX_HEIGHT              1024
+#define MT9M001_MIN_WIDTH               48
+#define MT9M001_MIN_HEIGHT              32
+#define MT9M001_COLUMN_SKIP             20
+#define MT9M001_ROW_SKIP                12
+
+/* MT9M001 has only one fixed colorspace per pixelcode */
+struct mt9m001_datafmt {
+        enum v4l2_mbus_pixelcode        code;
+        enum v4l2_colorspace            colorspace;
+};
+
+/* Find a data format by a pixel code in an array */
+static const struct mt9m001_datafmt *mt9m001_find_datafmt(
+        enum v4l2_mbus_pixelcode code, const struct mt9m001_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 mt9m001_datafmt mt9m001_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 mt9m001_datafmt mt9m001_monochrome_fmts[] = {
+        /* Order important - see above */
+        {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
+        {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
+};
+
+struct mt9m001 {
+        struct v4l2_subdev subdev;
+        struct v4l2_rect rect;  /* Sensor window */
+        const struct mt9m001_datafmt *fmt;
+        const struct mt9m001_datafmt *fmts;
+        int num_fmts;
+        int model;      /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
+        unsigned int gain;
+        unsigned int exposure;
+        unsigned short y_skip_top;      /* Lines to skip at the top */
+        unsigned char autoexposure;
+};
+
+static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
+{
+        return container_of(i2c_get_clientdata(client), struct mt9m001, 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 mt9m001_init(struct i2c_client *client)
+{
+        int ret;
+
+        dev_dbg(&client->dev, "%s\n", __func__);
+
+        /*
+         * We don't know, whether platform provides reset, issue a soft reset
+         * too. This returns all registers to their default values.
+         */
+        ret = reg_write(client, MT9M001_RESET, 1);
+        if (!ret)
+                ret = reg_write(client, MT9M001_RESET, 0);
+
+        /* Disable chip, synchronous option update */
+        if (!ret)
+                ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
+
+        return ret;
+}
+
+static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        /* Switch to master "normal" mode or stop sensor readout */
+        if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0)
+                return -EIO;
+        return 0;
+}
+
+static int mt9m001_set_bus_param(struct soc_camera_device *icd,
+                                 unsigned long flags)
+{
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK;
+
+        /* Only one width bit may be set */
+        if (!is_power_of_2(width_flag))
+                return -EINVAL;
+
+        if (icl->set_bus_param)
+                return icl->set_bus_param(icl, width_flag);
+
+        /*
+         * Without board specific bus width settings we only support the
+         * sensors native bus width
+         */
+        if (width_flag == SOCAM_DATAWIDTH_10)
+                return 0;
+
+        return -EINVAL;
+}
+
+static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
+{
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        /* MT9M001 has all capture_format parameters fixed */
+        unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING |
+                SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
+                SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER;
+
+        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 mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        struct v4l2_rect rect = a->c;
+        struct soc_camera_device *icd = client->dev.platform_data;
+        int ret;
+        const u16 hblank = 9, vblank = 25;
+        unsigned int total_h;
+
+        if (mt9m001->fmts == mt9m001_colour_fmts)
+                /*
+                 * Bayer format - even number of rows for simplicity,
+                 * but let the user play with the top row.
+                 */
+                rect.height = ALIGN(rect.height, 2);
+
+        /* Datasheet requirement: see register description */
+        rect.width = ALIGN(rect.width, 2);
+        rect.left = ALIGN(rect.left, 2);
+
+        soc_camera_limit_side(&rect.left, &rect.width,
+                     MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH);
+
+        soc_camera_limit_side(&rect.top, &rect.height,
+                     MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
+
+        total_h = rect.height + mt9m001->y_skip_top + vblank;
+
+        /* Blanking and start values - default... */
+        ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
+        if (!ret)
+                ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank);
+
+        /*
+         * The caller provides a supported format, as verified per
+         * call to icd->try_fmt()
+         */
+        if (!ret)
+                ret = reg_write(client, MT9M001_COLUMN_START, rect.left);
+        if (!ret)
+                ret = reg_write(client, MT9M001_ROW_START, rect.top);
+        if (!ret)
+                ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1);
+        if (!ret)
+                ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
+                                rect.height + mt9m001->y_skip_top - 1);
+        if (!ret && mt9m001->autoexposure) {
+                ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
+                if (!ret) {
+                        const struct v4l2_queryctrl *qctrl =
+                                soc_camera_find_qctrl(icd->ops,
+                                                      V4L2_CID_EXPOSURE);
+                        mt9m001->exposure = (524 + (total_h - 1) *
+                                 (qctrl->maximum - qctrl->minimum)) /
+                                1048 + qctrl->minimum;
+                }
+        }
+
+        if (!ret)
+                mt9m001->rect = rect;
+
+        return ret;
+}
+
+static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        a->c    = mt9m001->rect;
+        a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+        return 0;
+}
+
+static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+        a->bounds.left                  = MT9M001_COLUMN_SKIP;
+        a->bounds.top                   = MT9M001_ROW_SKIP;
+        a->bounds.width                 = MT9M001_MAX_WIDTH;
+        a->bounds.height                = MT9M001_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 mt9m001_g_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        mf->width       = mt9m001->rect.width;
+        mf->height      = mt9m001->rect.height;
+        mf->code        = mt9m001->fmt->code;
+        mf->colorspace  = mt9m001->fmt->colorspace;
+        mf->field       = V4L2_FIELD_NONE;
+
+        return 0;
+}
+
+static int mt9m001_s_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        struct v4l2_crop a = {
+                .c = {
+                        .left   = mt9m001->rect.left,
+                        .top    = mt9m001->rect.top,
+                        .width  = mf->width,
+                        .height = mf->height,
+                },
+        };
+        int ret;
+
+        /* No support for scaling so far, just crop. TODO: use skipping */
+        ret = mt9m001_s_crop(sd, &a);
+        if (!ret) {
+                mf->width       = mt9m001->rect.width;
+                mf->height      = mt9m001->rect.height;
+                mt9m001->fmt    = mt9m001_find_datafmt(mf->code,
+                                        mt9m001->fmts, mt9m001->num_fmts);
+                mf->colorspace  = mt9m001->fmt->colorspace;
+        }
+
+        return ret;
+}
+
+static int mt9m001_try_fmt(struct v4l2_subdev *sd,
+                           struct v4l2_mbus_framefmt *mf)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        const struct mt9m001_datafmt *fmt;
+
+        v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
+                MT9M001_MAX_WIDTH, 1,
+                &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
+                MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
+
+        if (mt9m001->fmts == mt9m001_colour_fmts)
+                mf->height = ALIGN(mf->height - 1, 2);
+
+        fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
+                                   mt9m001->num_fmts);
+        if (!fmt) {
+                fmt = mt9m001->fmt;
+                mf->code = fmt->code;
+        }
+
+        mf->colorspace  = fmt->colorspace;
+
+        return 0;
+}
+
+static int mt9m001_g_chip_ident(struct v4l2_subdev *sd,
+                                struct v4l2_dbg_chip_ident *id)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+                return -EINVAL;
+
+        if (id->match.addr != client->addr)
+                return -ENODEV;
+
+        id->ident       = mt9m001->model;
+        id->revision    = 0;
+
+        return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9m001_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 mt9m001_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 mt9m001_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_GAIN,
+                .type           = V4L2_CTRL_TYPE_INTEGER,
+                .name           = "Gain",
+                .minimum        = 0,
+                .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_EXPOSURE_AUTO,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Automatic Exposure",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 1,
+        }
+};
+
+static struct soc_camera_ops mt9m001_ops = {
+        .set_bus_param          = mt9m001_set_bus_param,
+        .query_bus_param        = mt9m001_query_bus_param,
+        .controls               = mt9m001_controls,
+        .num_controls           = ARRAY_SIZE(mt9m001_controls),
+};
+
+static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        int data;
+
+        switch (ctrl->id) {
+        case V4L2_CID_VFLIP:
+                data = reg_read(client, MT9M001_READ_OPTIONS2);
+                if (data < 0)
+                        return -EIO;
+                ctrl->value = !!(data & 0x8000);
+                break;
+        case V4L2_CID_EXPOSURE_AUTO:
+                ctrl->value = mt9m001->autoexposure;
+                break;
+        case V4L2_CID_GAIN:
+                ctrl->value = mt9m001->gain;
+                break;
+        case V4L2_CID_EXPOSURE:
+                ctrl->value = mt9m001->exposure;
+                break;
+        }
+        return 0;
+}
+
+static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        struct soc_camera_device *icd = client->dev.platform_data;
+        const struct v4l2_queryctrl *qctrl;
+        int data;
+
+        qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
+
+        if (!qctrl)
+                return -EINVAL;
+
+        switch (ctrl->id) {
+        case V4L2_CID_VFLIP:
+                if (ctrl->value)
+                        data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
+                else
+                        data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
+                if (data < 0)
+                        return -EIO;
+                break;
+        case V4L2_CID_GAIN:
+                if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
+                        return -EINVAL;
+                /* See Datasheet Table 7, Gain settings. */
+                if (ctrl->value <= qctrl->default_value) {
+                        /* Pack it into 0..1 step 0.125, register values 0..8 */
+                        unsigned long range = qctrl->default_value - qctrl->minimum;
+                        data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
+
+                        dev_dbg(&client->dev, "Setting gain %d\n", data);
+                        data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
+                        if (data < 0)
+                                return -EIO;
+                } else {
+                        /* Pack it into 1.125..15 variable step, register values 9..67 */
+                        /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
+                        unsigned long range = qctrl->maximum - qctrl->default_value - 1;
+                        unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
+                                               111 + range / 2) / range + 9;
+
+                        if (gain <= 32)
+                                data = gain;
+                        else if (gain <= 64)
+                                data = ((gain - 32) * 16 + 16) / 32 + 80;
+                        else
+                                data = ((gain - 64) * 7 + 28) / 56 + 96;
+
+                        dev_dbg(&client->dev, "Setting gain from %d to %d\n",
+                                 reg_read(client, MT9M001_GLOBAL_GAIN), data);
+                        data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
+                        if (data < 0)
+                                return -EIO;
+                }
+
+                /* Success */
+                mt9m001->gain = ctrl->value;
+                break;
+        case V4L2_CID_EXPOSURE:
+                /* mt9m001 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) * 1048 +
+                                                 range / 2) / range + 1;
+
+                        dev_dbg(&client->dev,
+                                "Setting shutter width from %d to %lu\n",
+                                reg_read(client, MT9M001_SHUTTER_WIDTH),
+                                shutter);
+                        if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
+                                return -EIO;
+                        mt9m001->exposure = ctrl->value;
+                        mt9m001->autoexposure = 0;
+                }
+                break;
+        case V4L2_CID_EXPOSURE_AUTO:
+                if (ctrl->value) {
+                        const u16 vblank = 25;
+                        unsigned int total_h = mt9m001->rect.height +
+                                mt9m001->y_skip_top + vblank;
+                        if (reg_write(client, MT9M001_SHUTTER_WIDTH,
+                                      total_h) < 0)
+                                return -EIO;
+                        qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
+                        mt9m001->exposure = (524 + (total_h - 1) *
+                                 (qctrl->maximum - qctrl->minimum)) /
+                                1048 + qctrl->minimum;
+                        mt9m001->autoexposure = 1;
+                } else
+                        mt9m001->autoexposure = 0;
+                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 mt9m001_video_probe(struct soc_camera_device *icd,
+                               struct i2c_client *client)
+{
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        struct soc_camera_link *icl = to_soc_camera_link(icd);
+        s32 data;
+        unsigned long flags;
+        int ret;
+
+        /* 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);
+
+        /* Enable the chip */
+        data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
+        dev_dbg(&client->dev, "write: %d\n", data);
+
+        /* Read out the chip version register */
+        data = reg_read(client, MT9M001_CHIP_VERSION);
+
+        /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
+        switch (data) {
+        case 0x8411:
+        case 0x8421:
+                mt9m001->model = V4L2_IDENT_MT9M001C12ST;
+                mt9m001->fmts = mt9m001_colour_fmts;
+                break;
+        case 0x8431:
+                mt9m001->model = V4L2_IDENT_MT9M001C12STM;
+                mt9m001->fmts = mt9m001_monochrome_fmts;
+                break;
+        default:
+                dev_err(&client->dev,
+                        "No MT9M001 chip detected, register read %x\n", data);
+                return -ENODEV;
+        }
+
+        mt9m001->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)
+                mt9m001->num_fmts++;
+        else
+                mt9m001->fmts++;
+
+        if (flags & SOCAM_DATAWIDTH_8)
+                mt9m001->num_fmts++;
+
+        mt9m001->fmt = &mt9m001->fmts[0];
+
+        dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
+                 data == 0x8431 ? "C12STM" : "C12ST");
+
+        ret = mt9m001_init(client);
+        if (ret < 0)
+                dev_err(&client->dev, "Failed to initialise the camera\n");
+
+        /* mt9m001_init() has reset the chip, returning registers to defaults */
+        mt9m001->gain = 64;
+        mt9m001->exposure = 255;
+
+        return ret;
+}
+
+static void mt9m001_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 mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        *lines = mt9m001->y_skip_top;
+
+        return 0;
+}
+
+static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
+        .g_ctrl         = mt9m001_g_ctrl,
+        .s_ctrl         = mt9m001_s_ctrl,
+        .g_chip_ident   = mt9m001_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register     = mt9m001_g_register,
+        .s_register     = mt9m001_s_register,
+#endif
+};
+
+static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+                            enum v4l2_mbus_pixelcode *code)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        if (index >= mt9m001->num_fmts)
+                return -EINVAL;
+
+        *code = mt9m001->fmts[index].code;
+        return 0;
+}
+
+static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
+        .s_stream       = mt9m001_s_stream,
+        .s_mbus_fmt     = mt9m001_s_fmt,
+        .g_mbus_fmt     = mt9m001_g_fmt,
+        .try_mbus_fmt   = mt9m001_try_fmt,
+        .s_crop         = mt9m001_s_crop,
+        .g_crop         = mt9m001_g_crop,
+        .cropcap        = mt9m001_cropcap,
+        .enum_mbus_fmt  = mt9m001_enum_fmt,
+};
+
+static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
+        .g_skip_top_lines       = mt9m001_g_skip_top_lines,
+};
+
+static struct v4l2_subdev_ops mt9m001_subdev_ops = {
+        .core   = &mt9m001_subdev_core_ops,
+        .video  = &mt9m001_subdev_video_ops,
+        .sensor = &mt9m001_subdev_sensor_ops,
+};
+
+static int mt9m001_probe(struct i2c_client *client,
+                         const struct i2c_device_id *did)
+{
+        struct mt9m001 *mt9m001;
+        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, "MT9M001: missing soc-camera data!\n");
+                return -EINVAL;
+        }
+
+        icl = to_soc_camera_link(icd);
+        if (!icl) {
+                dev_err(&client->dev, "MT9M001 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;
+        }
+
+        mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
+        if (!mt9m001)
+                return -ENOMEM;
+
+        v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
+
+        /* Second stage probe - when a capture adapter is there */
+        icd->ops                = &mt9m001_ops;
+
+        mt9m001->y_skip_top     = 0;
+        mt9m001->rect.left      = MT9M001_COLUMN_SKIP;
+        mt9m001->rect.top       = MT9M001_ROW_SKIP;
+        mt9m001->rect.width     = MT9M001_MAX_WIDTH;
+        mt9m001->rect.height    = MT9M001_MAX_HEIGHT;
+
+        /*
+         * Simulated autoexposure. If enabled, we calculate shutter width
+         * ourselves in the driver based on vertical blanking and frame width
+         */
+        mt9m001->autoexposure = 1;
+
+        ret = mt9m001_video_probe(icd, client);
+        if (ret) {
+                icd->ops = NULL;
+                kfree(mt9m001);
+        }
+
+        return ret;
+}
+
+static int mt9m001_remove(struct i2c_client *client)
+{
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+        struct soc_camera_device *icd = client->dev.platform_data;
+
+        icd->ops = NULL;
+        mt9m001_video_remove(icd);
+        kfree(mt9m001);
+
+        return 0;
+}
+
+static const struct i2c_device_id mt9m001_id[] = {
+        { "mt9m001", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9m001_id);
+
+static struct i2c_driver mt9m001_i2c_driver = {
+        .driver = {
+                .name = "mt9m001",
+        },
+        .probe          = mt9m001_probe,
+        .remove         = mt9m001_remove,
+        .id_table       = mt9m001_id,
+};
+
+static int __init mt9m001_mod_init(void)
+{
+        return i2c_add_driver(&mt9m001_i2c_driver);
+}
+
+static void __exit mt9m001_mod_exit(void)
+{
+        i2c_del_driver(&mt9m001_i2c_driver);
+}
+
+module_init(mt9m001_mod_init);
+module_exit(mt9m001_mod_exit);
+
+MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");