1 files changed, 496 insertions, 0 deletions

diff --git a/drivers/media/video/mt9v011.c b/drivers/media/video/mt9v011.c
new file mode 100644
index 000000000000..b2260de645f0
--- /dev/null
+++ b/drivers/media/video/mt9v011.c
@@ -0,0 +1,496 @@
+/*
+ * 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/videodev2.h>
+#include <linux/delay.h>
+#include <asm/div64.h>
+#include <media/v4l2-device.h>
+#include "mt9v011.h"
+#include <media/v4l2-i2c-drv.h>
+#include <media/v4l2-chip-ident.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)");
+
+/* supported controls */
+static struct v4l2_queryctrl mt9v011_qctrl[] = {
+        {
+                .id = V4L2_CID_GAIN,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "Gain",
+                .minimum = 0,
+                .maximum = (1 << 10) - 1,
+                .step = 1,
+                .default_value = 0x0020,
+                .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,
+        },
+};
+
+struct mt9v011 {
+        struct v4l2_subdev sd;
+        unsigned width, height;
+        unsigned xtal;
+
+        u16 global_gain, 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 },
+                { R20_MT9V011_READ_MODE, 0x1000 },
+
+                { R07_MT9V011_OUT_CTRL, 0x0002 },       /* chip enable */
+};
+
+static void set_balance(struct v4l2_subdev *sd)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        u16 green1_gain, green2_gain, blue_gain, red_gain;
+
+        green1_gain = core->global_gain;
+        green2_gain = core->global_gain;
+
+        blue_gain = core->global_gain +
+                    core->global_gain * core->blue_bal / (1 << 9);
+
+        red_gain = core->global_gain +
+                   core->global_gain * core->blue_bal / (1 << 9);
+
+        mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
+        mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN,  green1_gain);
+        mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
+        mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
+}
+
+static void calc_fps(struct v4l2_subdev *sd)
+{
+        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);
+}
+
+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 = 14 + (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);
+};
+
+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);
+
+        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_RED_BALANCE:
+                ctrl->value = core->red_bal;
+                return 0;
+        case V4L2_CID_BLUE_BALANCE:
+                ctrl->value = core->blue_bal;
+                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_RED_BALANCE:
+                core->red_bal = ctrl->value;
+                break;
+        case V4L2_CID_BLUE_BALANCE:
+                core->blue_bal = ctrl->value;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        set_balance(sd);
+
+        return 0;
+}
+
+static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
+{
+        if (fmt->index > 0)
+                return -EINVAL;
+
+        fmt->flags = 0;
+        strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
+        fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
+
+        return 0;
+}
+
+static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
+{
+        struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+        if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
+                return -EINVAL;
+
+        v4l_bound_align_image(&pix->width, 48, 639, 1,
+                              &pix->height, 32, 480, 1, 0);
+
+        return 0;
+}
+
+static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
+{
+        struct v4l2_pix_format *pix = &fmt->fmt.pix;
+        struct mt9v011 *core = to_mt9v011(sd);
+        int rc;
+
+        rc = mt9v011_try_fmt(sd, fmt);
+        if (rc < 0)
+                return -EINVAL;
+
+        core->width = pix->width;
+        core->height = pix->height;
+
+        set_res(sd);
+
+        return 0;
+}
+
+static int mt9v011_s_config(struct v4l2_subdev *sd, int dumb, void *data)
+{
+        struct mt9v011 *core = to_mt9v011(sd);
+        unsigned *xtal = data;
+
+        v4l2_dbg(1, debug, sd, "s_config called\n");
+
+        if (xtal) {
+                core->xtal = *xtal;
+                v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
+                         *xtal / 1000000, (*xtal / 1000) % 1000);
+        }
+
+        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)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
+                                          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,
+        .s_config = mt9v011_s_config,
+        .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_fmt = mt9v011_enum_fmt,
+        .try_fmt = mt9v011_try_fmt,
+        .s_fmt = mt9v011_s_fmt,
+};
+
+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) {
+                v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n",
+                          version);
+                kfree(core);
+                return -EINVAL;
+        }
+
+        core->global_gain = 0x0024;
+        core->width  = 640;
+        core->height = 480;
+        core->xtal = 27000000;  /* Hz */
+
+        v4l_info(c, "chip found @ 0x%02x (%s)\n",
+                 c->addr << 1, c->adapter->name);
+
+        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 v4l2_i2c_driver_data v4l2_i2c_data = {
+        .name = "mt9v011",
+        .probe = mt9v011_probe,
+        .remove = mt9v011_remove,
+        .id_table = mt9v011_id,
+};