1 files changed, 722 insertions, 0 deletions

diff --git a/drivers/media/video/mt9v011.c b/drivers/media/video/mt9v011.c
new file mode 100644
index 00000000000..893a8b8f514
--- /dev/null
+++ b/drivers/media/video/mt9v011.c
@@ -0,0 +1,722 @@
+/*
+ * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
+ *
+ * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
+ * This code is placed under the terms of the GNU General Public License v2
+ */
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <linux/delay.h>
+#include <asm/div64.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/mt9v011.h>
+
+MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
+
+#define R00_MT9V011_CHIP_VERSION        0x00
+#define R01_MT9V011_ROWSTART            0x01
+#define R02_MT9V011_COLSTART            0x02
+#define R03_MT9V011_HEIGHT              0x03
+#define R04_MT9V011_WIDTH               0x04
+#define R05_MT9V011_HBLANK              0x05
+#define R06_MT9V011_VBLANK              0x06
+#define R07_MT9V011_OUT_CTRL            0x07
+#define R09_MT9V011_SHUTTER_WIDTH       0x09
+#define R0A_MT9V011_CLK_SPEED           0x0a
+#define R0B_MT9V011_RESTART             0x0b
+#define R0C_MT9V011_SHUTTER_DELAY       0x0c
+#define R0D_MT9V011_RESET               0x0d
+#define R1E_MT9V011_DIGITAL_ZOOM        0x1e
+#define R20_MT9V011_READ_MODE           0x20
+#define R2B_MT9V011_GREEN_1_GAIN        0x2b
+#define R2C_MT9V011_BLUE_GAIN           0x2c
+#define R2D_MT9V011_RED_GAIN            0x2d
+#define R2E_MT9V011_GREEN_2_GAIN        0x2e
+#define R35_MT9V011_GLOBAL_GAIN         0x35
+#define RF1_MT9V011_CHIP_ENABLE         0xf1
+
+#define MT9V011_VERSION                 0x8232
+#define MT9V011_REV_B_VERSION           0x8243
+
+/* supported controls */
+static struct v4l2_queryctrl mt9v011_qctrl[] = {
+        {
+                .id = V4L2_CID_GAIN,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "Gain",
+                .minimum = 0,
+                .maximum = (1 << 12) - 1 - 0x0020,
+                .step = 1,
+                .default_value = 0x0020,
+                .flags = 0,
+        }, {
+                .id = V4L2_CID_EXPOSURE,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "Exposure",
+                .minimum = 0,
+                .maximum = 2047,
+                .step = 1,
+                .default_value = 0x01fc,
+                .flags = 0,
+        }, {
+                .id = V4L2_CID_RED_BALANCE,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "Red Balance",
+                .minimum = -1 << 9,
+                .maximum = (1 << 9) - 1,
+                .step = 1,
+                .default_value = 0,
+                .flags = 0,
+        }, {
+                .id = V4L2_CID_BLUE_BALANCE,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "Blue Balance",
+                .minimum = -1 << 9,
+                .maximum = (1 << 9) - 1,
+                .step = 1,
+                .default_value = 0,
+                .flags = 0,
+        }, {
+                .id      = V4L2_CID_HFLIP,
+                .type    = V4L2_CTRL_TYPE_BOOLEAN,
+                .name    = "Mirror",
+                .minimum = 0,
+                .maximum = 1,
+                .step    = 1,
+                .default_value = 0,
+                .flags = 0,
+        }, {
+                .id      = V4L2_CID_VFLIP,
+                .type    = V4L2_CTRL_TYPE_BOOLEAN,
+                .name    = "Vflip",
+                .minimum = 0,
+                .maximum = 1,
+                .step    = 1,
+                .default_value = 0,
+                .flags = 0,
+        }, {
+        }
+};
+
+struct mt9v011 {
+        struct v4l2_subdev sd;
+        unsigned width, height;
+        unsigned xtal;
+        unsigned hflip:1;
+        unsigned vflip:1;
+
+        u16 global_gain, exposure;
+        s16 red_bal, blue_bal;
+};
+
+static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct mt9v011, sd);
+}
+
+static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
+{
+        struct i2c_client *c = v4l2_get_subdevdata(sd);
+        __be16 buffer;
+        int rc, val;
+
+        rc = i2c_master_send(c, &addr, 1);
+        if (rc != 1)
+                v4l2_dbg(0, debug, sd,
+                         "i2c i/o error: rc == %d (should be 1)\n", rc);
+
+        msleep(10);
+
+        rc = i2c_master_recv(c, (char *)&buffer, 2);
+        if (rc != 2)
+                v4l2_dbg(0, debug, sd,
+                         "i2c i/o error: rc == %d (should be 2)\n", rc);
+
+        val = be16_to_cpu(buffer);
+
+        v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
+
+        return val;
+}
+
+static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
+                                 u16 value)
+{
+        struct i2c_client *c = v4l2_get_subdevdata(sd);
+        unsigned char buffer[3];
+        int rc;
+
+        buffer[0] = addr;
+        buffer[1] = value >> 8;
+        buffer[2] = value & 0xff;
+
+        v4l2_dbg(2, debug, sd,
+                 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
+        rc = i2c_master_send(c, buffer, 3);
+        if (rc != 3)
+                v4l2_dbg(0, debug, sd,
+                         "i2c i/o error: rc == %d (should be 3)\n", rc);
+}
+
+
+struct i2c_reg_value {
+        unsigned char reg;
+        u16           value;
+};
+
+/*
+ * Values used at the original driver
+ * Some values are marked as Reserved at the datasheet
+ */
+static const struct i2c_reg_value mt9v011_init_default[] = {
+                { R0D_MT9V011_RESET, 0x0001 },
+                { R0D_MT9V011_RESET, 0x0000 },
+
+                { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
+                { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
+
+                { R0A_MT9V011_CLK_SPEED, 0x0000 },
+                { R1E_MT9V011_DIGITAL_ZOOM,  0x0000 },
+
+                { R07_MT9V011_OUT_CTRL, 0x0002 },       /* chip enable */
+};
+
+
+static u16 calc_mt9v011_gain(s16 lineargain)
+{
+
+        u16 digitalgain = 0;
+        u16 analogmult = 0;
+        u16 analoginit = 0;
+
+        if (lineargain < 0)
+                lineargain = 0;
+
+        /* recommended minimum */
+        lineargain += 0x0020;
+
+        if (lineargain > 2047)
+                lineargain = 2047;
+
+        if (lineargain > 1023) {
+                digitalgain = 3;
+                analogmult = 3;
+                analoginit = lineargain / 16;
+        } else if (lineargain > 511) {
+                digitalgain = 1;
+                analogmult = 3;
+                analoginit = lineargain / 8;
+        } else if (lineargain > 255) {
+                analogmult = 3;
+                analoginit = lineargain / 4;
+        } else if (lineargain > 127) {
+                analogmult = 1;
+                analoginit = lineargain / 2;
+        } else
+                analoginit = lineargain;
+
+        return analoginit + (analogmult << 7) + (digitalgain << 9);
+
+}
+
+static void set_balance(struct v4l2_subdev *sd)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        u16 green_gain, blue_gain, red_gain;
+        u16 exposure;
+        s16 bal;
+
+        exposure = core->exposure;
+
+        green_gain = calc_mt9v011_gain(core->global_gain);
+
+        bal = core->global_gain;
+        bal += (core->blue_bal * core->global_gain / (1 << 7));
+        blue_gain = calc_mt9v011_gain(bal);
+
+        bal = core->global_gain;
+        bal += (core->red_bal * core->global_gain / (1 << 7));
+        red_gain = calc_mt9v011_gain(bal);
+
+        mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);
+        mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);
+        mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
+        mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
+        mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);
+}
+
+static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        unsigned height, width, hblank, vblank, speed;
+        unsigned row_time, t_time;
+        u64 frames_per_ms;
+        unsigned tmp;
+
+        height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
+        width = mt9v011_read(sd, R04_MT9V011_WIDTH);
+        hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
+        vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
+        speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
+
+        row_time = (width + 113 + hblank) * (speed + 2);
+        t_time = row_time * (height + vblank + 1);
+
+        frames_per_ms = core->xtal * 1000l;
+        do_div(frames_per_ms, t_time);
+        tmp = frames_per_ms;
+
+        v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
+                tmp / 1000, tmp % 1000, t_time);
+
+        if (numerator && denominator) {
+                *numerator = 1000;
+                *denominator = (u32)frames_per_ms;
+        }
+}
+
+static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        unsigned height, width, hblank, vblank;
+        unsigned row_time, line_time;
+        u64 t_time, speed;
+
+        /* Avoid bogus calculus */
+        if (!numerator || !denominator)
+                return 0;
+
+        height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
+        width = mt9v011_read(sd, R04_MT9V011_WIDTH);
+        hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
+        vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
+
+        row_time = width + 113 + hblank;
+        line_time = height + vblank + 1;
+
+        t_time = core->xtal * ((u64)numerator);
+        /* round to the closest value */
+        t_time += denominator / 2;
+        do_div(t_time, denominator);
+
+        speed = t_time;
+        do_div(speed, row_time * line_time);
+
+        /* Avoid having a negative value for speed */
+        if (speed < 2)
+                speed = 0;
+        else
+                speed -= 2;
+
+        /* Avoid speed overflow */
+        if (speed > 15)
+                return 15;
+
+        return (u16)speed;
+}
+
+static void set_res(struct v4l2_subdev *sd)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        unsigned vstart, hstart;
+
+        /*
+         * The mt9v011 doesn't have scaling. So, in order to select the desired
+         * resolution, we're cropping at the middle of the sensor.
+         * hblank and vblank should be adjusted, in order to warrant that
+         * we'll preserve the line timings for 30 fps, no matter what resolution
+         * is selected.
+         * NOTE: datasheet says that width (and height) should be filled with
+         * width-1. However, this doesn't work, since one pixel per line will
+         * be missing.
+         */
+
+        hstart = 20 + (640 - core->width) / 2;
+        mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
+        mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
+        mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
+
+        vstart = 8 + (480 - core->height) / 2;
+        mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
+        mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
+        mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
+
+        calc_fps(sd, NULL, NULL);
+};
+
+static void set_read_mode(struct v4l2_subdev *sd)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        unsigned mode = 0x1000;
+
+        if (core->hflip)
+                mode |= 0x4000;
+
+        if (core->vflip)
+                mode |= 0x8000;
+
+        mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
+}
+
+static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
+                mt9v011_write(sd, mt9v011_init_default[i].reg,
+                               mt9v011_init_default[i].value);
+
+        set_balance(sd);
+        set_res(sd);
+        set_read_mode(sd);
+
+        return 0;
+};
+
+static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+
+        v4l2_dbg(1, debug, sd, "g_ctrl called\n");
+
+        switch (ctrl->id) {
+        case V4L2_CID_GAIN:
+                ctrl->value = core->global_gain;
+                return 0;
+        case V4L2_CID_EXPOSURE:
+                ctrl->value = core->exposure;
+                return 0;
+        case V4L2_CID_RED_BALANCE:
+                ctrl->value = core->red_bal;
+                return 0;
+        case V4L2_CID_BLUE_BALANCE:
+                ctrl->value = core->blue_bal;
+                return 0;
+        case V4L2_CID_HFLIP:
+                ctrl->value = core->hflip ? 1 : 0;
+                return 0;
+        case V4L2_CID_VFLIP:
+                ctrl->value = core->vflip ? 1 : 0;
+                return 0;
+        }
+        return -EINVAL;
+}
+
+static int mt9v011_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
+{
+        int i;
+
+        v4l2_dbg(1, debug, sd, "queryctrl called\n");
+
+        for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
+                if (qc->id && qc->id == mt9v011_qctrl[i].id) {
+                        memcpy(qc, &(mt9v011_qctrl[i]),
+                               sizeof(*qc));
+                        return 0;
+                }
+
+        return -EINVAL;
+}
+
+
+static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        u8 i, n;
+        n = ARRAY_SIZE(mt9v011_qctrl);
+
+        for (i = 0; i < n; i++) {
+                if (ctrl->id != mt9v011_qctrl[i].id)
+                        continue;
+                if (ctrl->value < mt9v011_qctrl[i].minimum ||
+                    ctrl->value > mt9v011_qctrl[i].maximum)
+                        return -ERANGE;
+                v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
+                                        ctrl->id, ctrl->value);
+                break;
+        }
+
+        switch (ctrl->id) {
+        case V4L2_CID_GAIN:
+                core->global_gain = ctrl->value;
+                break;
+        case V4L2_CID_EXPOSURE:
+                core->exposure = ctrl->value;
+                break;
+        case V4L2_CID_RED_BALANCE:
+                core->red_bal = ctrl->value;
+                break;
+        case V4L2_CID_BLUE_BALANCE:
+                core->blue_bal = ctrl->value;
+                break;
+        case V4L2_CID_HFLIP:
+                core->hflip = ctrl->value;
+                set_read_mode(sd);
+                return 0;
+        case V4L2_CID_VFLIP:
+                core->vflip = ctrl->value;
+                set_read_mode(sd);
+                return 0;
+        default:
+                return -EINVAL;
+        }
+
+        set_balance(sd);
+
+        return 0;
+}
+
+static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
+                                        enum v4l2_mbus_pixelcode *code)
+{
+        if (index > 0)
+                return -EINVAL;
+
+        *code = V4L2_MBUS_FMT_SGRBG8_1X8;
+        return 0;
+}
+
+static int mt9v011_try_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
+{
+        if (fmt->code != V4L2_MBUS_FMT_SGRBG8_1X8)
+                return -EINVAL;
+
+        v4l_bound_align_image(&fmt->width, 48, 639, 1,
+                              &fmt->height, 32, 480, 1, 0);
+        fmt->field = V4L2_FIELD_NONE;
+        fmt->colorspace = V4L2_COLORSPACE_SRGB;
+
+        return 0;
+}
+
+static int mt9v011_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
+{
+        struct v4l2_captureparm *cp = &parms->parm.capture;
+
+        if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                return -EINVAL;
+
+        memset(cp, 0, sizeof(struct v4l2_captureparm));
+        cp->capability = V4L2_CAP_TIMEPERFRAME;
+        calc_fps(sd,
+                 &cp->timeperframe.numerator,
+                 &cp->timeperframe.denominator);
+
+        return 0;
+}
+
+static int mt9v011_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
+{
+        struct v4l2_captureparm *cp = &parms->parm.capture;
+        struct v4l2_fract *tpf = &cp->timeperframe;
+        u16 speed;
+
+        if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                return -EINVAL;
+        if (cp->extendedmode != 0)
+                return -EINVAL;
+
+        speed = calc_speed(sd, tpf->numerator, tpf->denominator);
+
+        mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
+        v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
+
+        /* Recalculate and update fps info */
+        calc_fps(sd, &tpf->numerator, &tpf->denominator);
+
+        return 0;
+}
+
+static int mt9v011_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        int rc;
+
+        rc = mt9v011_try_mbus_fmt(sd, fmt);
+        if (rc < 0)
+                return -EINVAL;
+
+        core->width = fmt->width;
+        core->height = fmt->height;
+
+        set_res(sd);
+
+        return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9v011_g_register(struct v4l2_subdev *sd,
+                              struct v4l2_dbg_register *reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+
+        reg->val = mt9v011_read(sd, reg->reg & 0xff);
+        reg->size = 2;
+
+        return 0;
+}
+
+static int mt9v011_s_register(struct v4l2_subdev *sd,
+                              struct v4l2_dbg_register *reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+
+        mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
+
+        return 0;
+}
+#endif
+
+static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
+                                struct v4l2_dbg_chip_ident *chip)
+{
+        u16 version;
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
+                                          version);
+}
+
+static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
+        .queryctrl = mt9v011_queryctrl,
+        .g_ctrl = mt9v011_g_ctrl,
+        .s_ctrl = mt9v011_s_ctrl,
+        .reset = mt9v011_reset,
+        .g_chip_ident = mt9v011_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register = mt9v011_g_register,
+        .s_register = mt9v011_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
+        .enum_mbus_fmt = mt9v011_enum_mbus_fmt,
+        .try_mbus_fmt = mt9v011_try_mbus_fmt,
+        .s_mbus_fmt = mt9v011_s_mbus_fmt,
+        .g_parm = mt9v011_g_parm,
+        .s_parm = mt9v011_s_parm,
+};
+
+static const struct v4l2_subdev_ops mt9v011_ops = {
+        .core  = &mt9v011_core_ops,
+        .video = &mt9v011_video_ops,
+};
+
+
+/****************************************************************************
+                        I2C Client & Driver
+ ****************************************************************************/
+
+static int mt9v011_probe(struct i2c_client *c,
+                         const struct i2c_device_id *id)
+{
+        u16 version;
+        struct mt9v011 *core;
+        struct v4l2_subdev *sd;
+
+        /* Check if the adapter supports the needed features */
+        if (!i2c_check_functionality(c->adapter,
+             I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+                return -EIO;
+
+        core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
+        if (!core)
+                return -ENOMEM;
+
+        sd = &core->sd;
+        v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
+
+        /* Check if the sensor is really a MT9V011 */
+        version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
+        if ((version != MT9V011_VERSION) &&
+            (version != MT9V011_REV_B_VERSION)) {
+                v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
+                          version);
+                kfree(core);
+                return -EINVAL;
+        }
+
+        core->global_gain = 0x0024;
+        core->exposure = 0x01fc;
+        core->width  = 640;
+        core->height = 480;
+        core->xtal = 27000000;  /* Hz */
+
+        if (c->dev.platform_data) {
+                struct mt9v011_platform_data *pdata = c->dev.platform_data;
+
+                core->xtal = pdata->xtal;
+                v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
+                        core->xtal / 1000000, (core->xtal / 1000) % 1000);
+        }
+
+        v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
+                 c->addr << 1, c->adapter->name, version);
+
+        return 0;
+}
+
+static int mt9v011_remove(struct i2c_client *c)
+{
+        struct v4l2_subdev *sd = i2c_get_clientdata(c);
+
+        v4l2_dbg(1, debug, sd,
+                "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
+                c->addr << 1);
+
+        v4l2_device_unregister_subdev(sd);
+        kfree(to_mt9v011(sd));
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id mt9v011_id[] = {
+        { "mt9v011", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9v011_id);
+
+static struct i2c_driver mt9v011_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "mt9v011",
+        },
+        .probe          = mt9v011_probe,
+        .remove         = mt9v011_remove,
+        .id_table       = mt9v011_id,
+};
+
+static __init int init_mt9v011(void)
+{
+        return i2c_add_driver(&mt9v011_driver);
+}
+
+static __exit void exit_mt9v011(void)
+{
+        i2c_del_driver(&mt9v011_driver);
+}
+
+module_init(init_mt9v011);
+module_exit(exit_mt9v011);