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path: root/drivers/media/i2c/soc_camera/soc_mt9v022.c
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Diffstat (limited to 'drivers/media/i2c/soc_camera/soc_mt9v022.c')
-rw-r--r--drivers/media/i2c/soc_camera/soc_mt9v022.c1012
1 files changed, 1012 insertions, 0 deletions
diff --git a/drivers/media/i2c/soc_camera/soc_mt9v022.c b/drivers/media/i2c/soc_camera/soc_mt9v022.c
new file mode 100644
index 0000000..6d922b1
--- /dev/null
+++ b/drivers/media/i2c/soc_camera/soc_mt9v022.c
@@ -0,0 +1,1012 @@
+/*
+ * 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 <linux/module.h>
+
+#include <media/i2c/mt9v022.h>
+#include <media/soc_camera.h>
+#include <media/drv-intf/soc_mediabus.h>
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-clk.h>
+#include <media/v4l2-ctrls.h>
+
+/*
+ * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
+ * The platform has to define struct i2c_board_info objects and link to them
+ * from struct soc_camera_host_desc
+ */
+
+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_REG32 0x20
+#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
+
+/* mt9v024 partial list register addresses changes with respect to mt9v022 */
+#define MT9V024_PIXCLK_FV_LV 0x72
+#define MT9V024_MAX_TOTAL_SHUTTER_WIDTH 0xAD
+
+/* 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
+
+#define MT9V022_HORIZONTAL_BLANKING_MIN 43
+#define MT9V022_HORIZONTAL_BLANKING_MAX 1023
+#define MT9V022_HORIZONTAL_BLANKING_DEF 94
+#define MT9V022_VERTICAL_BLANKING_MIN 2
+#define MT9V022_VERTICAL_BLANKING_MAX 3000
+#define MT9V022_VERTICAL_BLANKING_DEF 45
+
+#define is_mt9v022_rev3(id) (id == 0x1313)
+#define is_mt9v024(id) (id == 0x1324)
+
+/* MT9V022 has only one fixed colorspace per pixelcode */
+struct mt9v022_datafmt {
+ u32 code;
+ enum v4l2_colorspace colorspace;
+};
+
+/* Find a data format by a pixel code in an array */
+static const struct mt9v022_datafmt *mt9v022_find_datafmt(
+ u32 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
+ */
+ {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
+ {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
+};
+
+static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
+ /* Order important - see above */
+ {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
+ {MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
+};
+
+/* only registers with different addresses on different mt9v02x sensors */
+struct mt9v02x_register {
+ u8 max_total_shutter_width;
+ u8 pixclk_fv_lv;
+};
+
+static const struct mt9v02x_register mt9v022_register = {
+ .max_total_shutter_width = MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
+ .pixclk_fv_lv = MT9V022_PIXCLK_FV_LV,
+};
+
+static const struct mt9v02x_register mt9v024_register = {
+ .max_total_shutter_width = MT9V024_MAX_TOTAL_SHUTTER_WIDTH,
+ .pixclk_fv_lv = MT9V024_PIXCLK_FV_LV,
+};
+
+enum mt9v022_model {
+ MT9V022IX7ATM,
+ MT9V022IX7ATC,
+};
+
+struct mt9v022 {
+ struct v4l2_subdev subdev;
+ struct v4l2_ctrl_handler hdl;
+ struct {
+ /* exposure/auto-exposure cluster */
+ struct v4l2_ctrl *autoexposure;
+ struct v4l2_ctrl *exposure;
+ };
+ struct {
+ /* gain/auto-gain cluster */
+ struct v4l2_ctrl *autogain;
+ struct v4l2_ctrl *gain;
+ };
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_rect rect; /* Sensor window */
+ struct v4l2_clk *clk;
+ const struct mt9v022_datafmt *fmt;
+ const struct mt9v022_datafmt *fmts;
+ const struct mt9v02x_register *reg;
+ int num_fmts;
+ enum mt9v022_model model;
+ u16 chip_control;
+ u16 chip_version;
+ 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)
+{
+ return i2c_smbus_read_word_swapped(client, reg);
+}
+
+static int reg_write(struct i2c_client *client, const u8 reg,
+ const u16 data)
+{
+ return i2c_smbus_write_word_swapped(client, reg, 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->reg->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);
+ if (!ret)
+ return v4l2_ctrl_handler_setup(&mt9v022->hdl);
+
+ 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;
+ if (is_mt9v022_rev3(mt9v022->chip_version) ||
+ is_mt9v024(mt9v022->chip_version)) {
+ /*
+ * Unset snapshot mode specific settings: clear bit 9
+ * and bit 2 in reg. 0x20 when in normal mode.
+ */
+ if (reg_clear(client, MT9V022_REG32, 0x204))
+ return -EIO;
+ }
+ } else {
+ /* Switch to snapshot mode */
+ mt9v022->chip_control |= 0x10;
+ if (is_mt9v022_rev3(mt9v022->chip_version) ||
+ is_mt9v024(mt9v022->chip_version)) {
+ /*
+ * Required settings for snapshot mode: set bit 9
+ * (RST enable) and bit 2 (CR enable) in reg. 0x20
+ * See TechNote TN0960 or TN-09-225.
+ */
+ if (reg_set(client, MT9V022_REG32, 0x204))
+ return -EIO;
+ }
+ }
+
+ if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
+ return -EIO;
+ return 0;
+}
+
+static int mt9v022_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ struct v4l2_rect rect = sel->r;
+ int min_row, min_blank;
+ int ret;
+
+ if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
+ sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ /* 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->reg->max_total_shutter_width,
+ rect.height + mt9v022->y_skip_top + 43);
+ /*
+ * If autoexposure is off, there is no need to set
+ * MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
+ * only if the user has set exposure manually, using the
+ * V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
+ * In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
+ * already contains the correct value.
+ */
+ }
+ /* 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);
+ /*
+ * mt9v022: min total row time is 660 columns, min blanking is 43
+ * mt9v024: min total row time is 690 columns, min blanking is 61
+ */
+ if (is_mt9v024(mt9v022->chip_version)) {
+ min_row = 690;
+ min_blank = 61;
+ } else {
+ min_row = 660;
+ min_blank = 43;
+ }
+ if (!ret)
+ ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
+ rect.width > min_row - min_blank ?
+ min_blank : min_row - rect.width);
+ if (!ret)
+ ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 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_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+ if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ sel->r.left = MT9V022_COLUMN_SKIP;
+ sel->r.top = MT9V022_ROW_SKIP;
+ sel->r.width = MT9V022_MAX_WIDTH;
+ sel->r.height = MT9V022_MAX_HEIGHT;
+ return 0;
+ case V4L2_SEL_TGT_CROP:
+ sel->r = mt9v022->rect;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mt9v022_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct v4l2_mbus_framefmt *mf = &format->format;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+ if (format->pad)
+ return -EINVAL;
+
+ 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,
+ const struct mt9v022_datafmt *fmt,
+ struct v4l2_mbus_framefmt *mf)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ struct v4l2_subdev_selection sel = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .target = V4L2_SEL_TGT_CROP,
+ .r.left = mt9v022->rect.left,
+ .r.top = mt9v022->rect.top,
+ .r.width = mf->width,
+ .r.height = mf->height,
+ };
+ int ret;
+
+ /*
+ * The caller provides a supported format, as verified per call to
+ * .set_fmt(FORMAT_TRY), datawidth is from our supported format list
+ */
+ switch (mf->code) {
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_Y10_1X10:
+ if (mt9v022->model != MT9V022IX7ATM)
+ return -EINVAL;
+ break;
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ case MEDIA_BUS_FMT_SBGGR10_1X10:
+ if (mt9v022->model != MT9V022IX7ATC)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* No support for scaling on this camera, just crop. */
+ ret = mt9v022_set_selection(sd, NULL, &sel);
+ if (!ret) {
+ mf->width = mt9v022->rect.width;
+ mf->height = mt9v022->rect.height;
+ mt9v022->fmt = fmt;
+ mf->colorspace = fmt->colorspace;
+ }
+
+ return ret;
+}
+
+static int mt9v022_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct v4l2_mbus_framefmt *mf = &format->format;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ const struct mt9v022_datafmt *fmt;
+ int align = mf->code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
+ mf->code == MEDIA_BUS_FMT_SBGGR10_1X10;
+
+ if (format->pad)
+ return -EINVAL;
+
+ 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;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ return mt9v022_s_fmt(sd, fmt, mf);
+ cfg->try_fmt = *mf;
+ 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->reg > 0xff)
+ return -EINVAL;
+
+ 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,
+ const struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ if (reg->reg > 0xff)
+ return -EINVAL;
+
+ if (reg_write(client, reg->reg, reg->val) < 0)
+ return -EIO;
+
+ return 0;
+}
+#endif
+
+static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+ return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
+}
+
+static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct mt9v022 *mt9v022 = container_of(ctrl->handler,
+ struct mt9v022, hdl);
+ struct v4l2_subdev *sd = &mt9v022->subdev;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct v4l2_ctrl *gain = mt9v022->gain;
+ struct v4l2_ctrl *exp = mt9v022->exposure;
+ unsigned long range;
+ int data;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ data = reg_read(client, MT9V022_ANALOG_GAIN);
+ if (data < 0)
+ return -EIO;
+
+ range = gain->maximum - gain->minimum;
+ gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
+ return 0;
+ case V4L2_CID_EXPOSURE_AUTO:
+ data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
+ if (data < 0)
+ return -EIO;
+
+ range = exp->maximum - exp->minimum;
+ exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
+ return 0;
+ case V4L2_CID_HBLANK:
+ data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
+ if (data < 0)
+ return -EIO;
+ ctrl->val = data;
+ return 0;
+ case V4L2_CID_VBLANK:
+ data = reg_read(client, MT9V022_VERTICAL_BLANKING);
+ if (data < 0)
+ return -EIO;
+ ctrl->val = data;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct mt9v022 *mt9v022 = container_of(ctrl->handler,
+ struct mt9v022, hdl);
+ struct v4l2_subdev *sd = &mt9v022->subdev;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int data;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ if (ctrl->val)
+ data = reg_set(client, MT9V022_READ_MODE, 0x10);
+ else
+ data = reg_clear(client, MT9V022_READ_MODE, 0x10);
+ if (data < 0)
+ return -EIO;
+ return 0;
+ case V4L2_CID_HFLIP:
+ if (ctrl->val)
+ data = reg_set(client, MT9V022_READ_MODE, 0x20);
+ else
+ data = reg_clear(client, MT9V022_READ_MODE, 0x20);
+ if (data < 0)
+ return -EIO;
+ return 0;
+ case V4L2_CID_AUTOGAIN:
+ if (ctrl->val) {
+ if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
+ return -EIO;
+ } else {
+ struct v4l2_ctrl *gain = mt9v022->gain;
+ /* mt9v022 has minimum == default */
+ unsigned long range = gain->maximum - gain->minimum;
+ /* Valid values 16 to 64, 32 to 64 must be even. */
+ unsigned long gain_val = ((gain->val - (s32)gain->minimum) *
+ 48 + range / 2) / range + 16;
+
+ if (gain_val >= 32)
+ gain_val &= ~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_val);
+ if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
+ return -EIO;
+ }
+ return 0;
+ case V4L2_CID_EXPOSURE_AUTO:
+ if (ctrl->val == V4L2_EXPOSURE_AUTO) {
+ data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
+ } else {
+ struct v4l2_ctrl *exp = mt9v022->exposure;
+ unsigned long range = exp->maximum - exp->minimum;
+ unsigned long shutter = ((exp->val - (s32)exp->minimum) *
+ 479 + range / 2) / range + 1;
+
+ /*
+ * The user wants to set shutter width manually, hope,
+ * she knows, what she's doing... Switch AEC off.
+ */
+ data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
+ if (data < 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;
+ }
+ return 0;
+ case V4L2_CID_HBLANK:
+ if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
+ ctrl->val) < 0)
+ return -EIO;
+ return 0;
+ case V4L2_CID_VBLANK:
+ if (reg_write(client, MT9V022_VERTICAL_BLANKING,
+ ctrl->val) < 0)
+ return -EIO;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+/*
+ * 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 i2c_client *client)
+{
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+ s32 data;
+ int ret;
+ unsigned long flags;
+
+ ret = mt9v022_s_power(&mt9v022->subdev, 1);
+ if (ret < 0)
+ return ret;
+
+ /* Read out the chip version register */
+ data = reg_read(client, MT9V022_CHIP_VERSION);
+
+ /* must be 0x1311, 0x1313 or 0x1324 */
+ if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
+ ret = -ENODEV;
+ dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
+ data);
+ goto ei2c;
+ }
+
+ mt9v022->chip_version = data;
+
+ mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
+ &mt9v022_register;
+
+ /* 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 = MT9V022IX7ATC;
+ mt9v022->fmts = mt9v022_colour_fmts;
+ } else {
+ ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
+ mt9v022->model = 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 (ssdd->query_bus_param)
+ flags = ssdd->query_bus_param(ssdd);
+ 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 == MT9V022IX7ATM ?
+ "monochrome" : "colour");
+
+ ret = mt9v022_init(client);
+ if (ret < 0)
+ dev_err(&client->dev, "Failed to initialise the camera\n");
+
+ei2c:
+ mt9v022_s_power(&mt9v022->subdev, 0);
+ return ret;
+}
+
+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 const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
+ .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
+ .s_ctrl = mt9v022_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = mt9v022_g_register,
+ .s_register = mt9v022_s_register,
+#endif
+ .s_power = mt9v022_s_power,
+};
+
+static int mt9v022_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+
+ if (code->pad || code->index >= mt9v022->num_fmts)
+ return -EINVAL;
+
+ code->code = mt9v022->fmts[code->index].code;
+ return 0;
+}
+
+static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
+ struct v4l2_mbus_config *cfg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+
+ cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
+ V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
+ V4L2_MBUS_DATA_ACTIVE_HIGH;
+ cfg->type = V4L2_MBUS_PARALLEL;
+ cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
+
+ return 0;
+}
+
+static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
+ const struct v4l2_mbus_config *cfg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
+ unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
+ int ret;
+ u16 pixclk = 0;
+
+ if (ssdd->set_bus_param) {
+ ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
+ if (ret)
+ return ret;
+ } else if (bps != 10) {
+ /*
+ * Without board specific bus width settings we only support the
+ * sensors native bus width
+ */
+ return -EINVAL;
+ }
+
+ if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ pixclk |= 0x10;
+
+ if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
+ pixclk |= 0x1;
+
+ if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
+ pixclk |= 0x2;
+
+ ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
+ if (ret < 0)
+ return ret;
+
+ if (!(flags & V4L2_MBUS_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 const struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
+ .s_stream = mt9v022_s_stream,
+ .g_mbus_config = mt9v022_g_mbus_config,
+ .s_mbus_config = mt9v022_s_mbus_config,
+};
+
+static const struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
+ .g_skip_top_lines = mt9v022_g_skip_top_lines,
+};
+
+static const struct v4l2_subdev_pad_ops mt9v022_subdev_pad_ops = {
+ .enum_mbus_code = mt9v022_enum_mbus_code,
+ .get_selection = mt9v022_get_selection,
+ .set_selection = mt9v022_set_selection,
+ .get_fmt = mt9v022_get_fmt,
+ .set_fmt = mt9v022_set_fmt,
+};
+
+static const struct v4l2_subdev_ops mt9v022_subdev_ops = {
+ .core = &mt9v022_subdev_core_ops,
+ .video = &mt9v022_subdev_video_ops,
+ .sensor = &mt9v022_subdev_sensor_ops,
+ .pad = &mt9v022_subdev_pad_ops,
+};
+
+static int mt9v022_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct mt9v022 *mt9v022;
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct mt9v022_platform_data *pdata;
+ int ret;
+
+ if (!ssdd) {
+ 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 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
+ if (!mt9v022)
+ return -ENOMEM;
+
+ pdata = ssdd->drv_priv;
+ v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
+ v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
+ v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+ mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_GAIN, 0, 127, 1, 64);
+
+ /*
+ * Simulated autoexposure. If enabled, we calculate shutter width
+ * ourselves in the driver based on vertical blanking and frame width
+ */
+ mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
+ &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
+ V4L2_EXPOSURE_AUTO);
+ mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_EXPOSURE, 1, 255, 1, 255);
+
+ mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
+ MT9V022_HORIZONTAL_BLANKING_MAX, 1,
+ MT9V022_HORIZONTAL_BLANKING_DEF);
+
+ mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
+ V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
+ MT9V022_VERTICAL_BLANKING_MAX, 1,
+ MT9V022_VERTICAL_BLANKING_DEF);
+
+ mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
+ if (mt9v022->hdl.error) {
+ int err = mt9v022->hdl.error;
+
+ dev_err(&client->dev, "control initialisation err %d\n", err);
+ return err;
+ }
+ v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
+ V4L2_EXPOSURE_MANUAL, true);
+ v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
+
+ mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
+
+ /*
+ * On some platforms the first read out line is corrupted.
+ * Workaround it by skipping if indicated by platform data.
+ */
+ mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
+ mt9v022->rect.left = MT9V022_COLUMN_SKIP;
+ mt9v022->rect.top = MT9V022_ROW_SKIP;
+ mt9v022->rect.width = MT9V022_MAX_WIDTH;
+ mt9v022->rect.height = MT9V022_MAX_HEIGHT;
+
+ mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
+ if (IS_ERR(mt9v022->clk)) {
+ ret = PTR_ERR(mt9v022->clk);
+ goto eclkget;
+ }
+
+ ret = mt9v022_video_probe(client);
+ if (ret) {
+ v4l2_clk_put(mt9v022->clk);
+eclkget:
+ v4l2_ctrl_handler_free(&mt9v022->hdl);
+ }
+
+ return ret;
+}
+
+static int mt9v022_remove(struct i2c_client *client)
+{
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+
+ v4l2_clk_put(mt9v022->clk);
+ v4l2_device_unregister_subdev(&mt9v022->subdev);
+ if (ssdd->free_bus)
+ ssdd->free_bus(ssdd);
+ v4l2_ctrl_handler_free(&mt9v022->hdl);
+
+ 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,
+};
+
+module_i2c_driver(mt9v022_i2c_driver);
+
+MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");

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