--- /dev/null
+/*
+ * Driver for MT9T001 CMOS Image Sensor from Aptina (Micron)
+ *
+ * Copyright (C) 2010-2011, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on the MT9M001 driver,
+ *
+ * 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/i2c.h>
+#include <linux/log2.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-mediabus.h>
+
+#include <media/mt9t001.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+#define MT9T001_PIXEL_ARRAY_HEIGHT 1568
+#define MT9T001_PIXEL_ARRAY_WIDTH 2112
+
+#define MT9T001_CHIP_VERSION 0x00
+#define MT9T001_CHIP_ID 0x1621
+#define MT9T001_ROW_START 0x01
+#define MT9T001_ROW_START_MIN 0
+#define MT9T001_ROW_START_DEF 20
+#define MT9T001_ROW_START_MAX 1534
+#define MT9T001_COLUMN_START 0x02
+#define MT9T001_COLUMN_START_MIN 0
+#define MT9T001_COLUMN_START_DEF 32
+#define MT9T001_COLUMN_START_MAX 2046
+#define MT9T001_WINDOW_HEIGHT 0x03
+#define MT9T001_WINDOW_HEIGHT_MIN 1
+#define MT9T001_WINDOW_HEIGHT_DEF 1535
+#define MT9T001_WINDOW_HEIGHT_MAX 1567
+#define MT9T001_WINDOW_WIDTH 0x04
+#define MT9T001_WINDOW_WIDTH_MIN 1
+#define MT9T001_WINDOW_WIDTH_DEF 2047
+#define MT9T001_WINDOW_WIDTH_MAX 2111
+#define MT9T001_HORIZONTAL_BLANKING 0x05
+#define MT9T001_HORIZONTAL_BLANKING_MIN 21
+#define MT9T001_HORIZONTAL_BLANKING_MAX 1023
+#define MT9T001_VERTICAL_BLANKING 0x06
+#define MT9T001_VERTICAL_BLANKING_MIN 3
+#define MT9T001_VERTICAL_BLANKING_MAX 1023
+#define MT9T001_OUTPUT_CONTROL 0x07
+#define MT9T001_OUTPUT_CONTROL_SYNC (1 << 0)
+#define MT9T001_OUTPUT_CONTROL_CHIP_ENABLE (1 << 1)
+#define MT9T001_OUTPUT_CONTROL_TEST_DATA (1 << 6)
+#define MT9T001_SHUTTER_WIDTH_HIGH 0x08
+#define MT9T001_SHUTTER_WIDTH_LOW 0x09
+#define MT9T001_SHUTTER_WIDTH_MIN 1
+#define MT9T001_SHUTTER_WIDTH_DEF 1561
+#define MT9T001_SHUTTER_WIDTH_MAX (1024 * 1024)
+#define MT9T001_PIXEL_CLOCK 0x0a
+#define MT9T001_PIXEL_CLOCK_INVERT (1 << 15)
+#define MT9T001_PIXEL_CLOCK_SHIFT_MASK (7 << 8)
+#define MT9T001_PIXEL_CLOCK_SHIFT_SHIFT 8
+#define MT9T001_PIXEL_CLOCK_DIVIDE_MASK (0x7f << 0)
+#define MT9T001_FRAME_RESTART 0x0b
+#define MT9T001_SHUTTER_DELAY 0x0c
+#define MT9T001_SHUTTER_DELAY_MAX 2047
+#define MT9T001_RESET 0x0d
+#define MT9T001_READ_MODE1 0x1e
+#define MT9T001_READ_MODE_SNAPSHOT (1 << 8)
+#define MT9T001_READ_MODE_STROBE_ENABLE (1 << 9)
+#define MT9T001_READ_MODE_STROBE_WIDTH (1 << 10)
+#define MT9T001_READ_MODE_STROBE_OVERRIDE (1 << 11)
+#define MT9T001_READ_MODE2 0x20
+#define MT9T001_READ_MODE_BAD_FRAMES (1 << 0)
+#define MT9T001_READ_MODE_LINE_VALID_CONTINUOUS (1 << 9)
+#define MT9T001_READ_MODE_LINE_VALID_FRAME (1 << 10)
+#define MT9T001_READ_MODE3 0x21
+#define MT9T001_READ_MODE_GLOBAL_RESET (1 << 0)
+#define MT9T001_READ_MODE_GHST_CTL (1 << 1)
+#define MT9T001_ROW_ADDRESS_MODE 0x22
+#define MT9T001_ROW_SKIP_MASK (7 << 0)
+#define MT9T001_ROW_BIN_MASK (3 << 3)
+#define MT9T001_ROW_BIN_SHIFT 3
+#define MT9T001_COLUMN_ADDRESS_MODE 0x23
+#define MT9T001_COLUMN_SKIP_MASK (7 << 0)
+#define MT9T001_COLUMN_BIN_MASK (3 << 3)
+#define MT9T001_COLUMN_BIN_SHIFT 3
+#define MT9T001_GREEN1_GAIN 0x2b
+#define MT9T001_BLUE_GAIN 0x2c
+#define MT9T001_RED_GAIN 0x2d
+#define MT9T001_GREEN2_GAIN 0x2e
+#define MT9T001_TEST_DATA 0x32
+#define MT9T001_GLOBAL_GAIN 0x35
+#define MT9T001_GLOBAL_GAIN_MIN 8
+#define MT9T001_GLOBAL_GAIN_MAX 1024
+#define MT9T001_BLACK_LEVEL 0x49
+#define MT9T001_ROW_BLACK_DEFAULT_OFFSET 0x4b
+#define MT9T001_BLC_DELTA_THRESHOLDS 0x5d
+#define MT9T001_CAL_THRESHOLDS 0x5f
+#define MT9T001_GREEN1_OFFSET 0x60
+#define MT9T001_GREEN2_OFFSET 0x61
+#define MT9T001_BLACK_LEVEL_CALIBRATION 0x62
+#define MT9T001_BLACK_LEVEL_OVERRIDE (1 << 0)
+#define MT9T001_BLACK_LEVEL_DISABLE_OFFSET (1 << 1)
+#define MT9T001_BLACK_LEVEL_RECALCULATE (1 << 12)
+#define MT9T001_BLACK_LEVEL_LOCK_RED_BLUE (1 << 13)
+#define MT9T001_BLACK_LEVEL_LOCK_GREEN (1 << 14)
+#define MT9T001_RED_OFFSET 0x63
+#define MT9T001_BLUE_OFFSET 0x64
+
+struct mt9t001 {
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+
+ struct v4l2_mbus_framefmt format;
+ struct v4l2_rect crop;
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *gains[4];
+
+ u16 output_control;
+ u16 black_level;
+};
+
+static inline struct mt9t001 *to_mt9t001(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct mt9t001, subdev);
+}
+
+static int mt9t001_read(struct i2c_client *client, u8 reg)
+{
+ s32 data = i2c_smbus_read_word_data(client, reg);
+ return data < 0 ? data : be16_to_cpu(data);
+}
+
+static int mt9t001_write(struct i2c_client *client, u8 reg, u16 data)
+{
+ return i2c_smbus_write_word_data(client, reg, cpu_to_be16(data));
+}
+
+static int mt9t001_set_output_control(struct mt9t001 *mt9t001, u16 clear,
+ u16 set)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9t001->subdev);
+ u16 value = (mt9t001->output_control & ~clear) | set;
+ int ret;
+
+ if (value == mt9t001->output_control)
+ return 0;
+
+ ret = mt9t001_write(client, MT9T001_OUTPUT_CONTROL, value);
+ if (ret < 0)
+ return ret;
+
+ mt9t001->output_control = value;
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev video operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__mt9t001_get_pad_format(struct mt9t001 *mt9t001, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(fh, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &mt9t001->format;
+ default:
+ return NULL;
+ }
+}
+
+static struct v4l2_rect *
+__mt9t001_get_pad_crop(struct mt9t001 *mt9t001, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_crop(fh, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &mt9t001->crop;
+ default:
+ return NULL;
+ }
+}
+
+static int mt9t001_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+ const u16 mode = MT9T001_OUTPUT_CONTROL_CHIP_ENABLE;
+ struct i2c_client *client = v4l2_get_subdevdata(subdev);
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+ struct v4l2_mbus_framefmt *format = &mt9t001->format;
+ struct v4l2_rect *crop = &mt9t001->crop;
+ unsigned int hratio;
+ unsigned int vratio;
+ int ret;
+
+ if (!enable)
+ return mt9t001_set_output_control(mt9t001, mode, 0);
+
+ /* Configure the window size and row/column bin */
+ hratio = DIV_ROUND_CLOSEST(crop->width, format->width);
+ vratio = DIV_ROUND_CLOSEST(crop->height, format->height);
+
+ ret = mt9t001_write(client, MT9T001_ROW_ADDRESS_MODE, hratio - 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_COLUMN_ADDRESS_MODE, vratio - 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_COLUMN_START, crop->left);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_ROW_START, crop->top);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_WINDOW_WIDTH, crop->width - 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_WINDOW_HEIGHT, crop->height - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Switch to master "normal" mode */
+ return mt9t001_set_output_control(mt9t001, 0, mode);
+}
+
+static int mt9t001_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index > 0)
+ return -EINVAL;
+
+ code->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ return 0;
+}
+
+static int mt9t001_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
+ return -EINVAL;
+
+ fse->min_width = (MT9T001_WINDOW_WIDTH_DEF + 1) / fse->index;
+ fse->max_width = fse->min_width;
+ fse->min_height = (MT9T001_WINDOW_HEIGHT_DEF + 1) / fse->index;
+ fse->max_height = fse->min_height;
+
+ return 0;
+}
+
+static int mt9t001_get_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *format)
+{
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+
+ format->format = *__mt9t001_get_pad_format(mt9t001, fh, format->pad,
+ format->which);
+ return 0;
+}
+
+static int mt9t001_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *format)
+{
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+ struct v4l2_mbus_framefmt *__format;
+ struct v4l2_rect *__crop;
+ unsigned int width;
+ unsigned int height;
+ unsigned int hratio;
+ unsigned int vratio;
+
+ __crop = __mt9t001_get_pad_crop(mt9t001, fh, format->pad,
+ format->which);
+
+ /* Clamp the width and height to avoid dividing by zero. */
+ width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
+ max(__crop->width / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+ __crop->width);
+ height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
+ max(__crop->height / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+ __crop->height);
+
+ hratio = DIV_ROUND_CLOSEST(__crop->width, width);
+ vratio = DIV_ROUND_CLOSEST(__crop->height, height);
+
+ __format = __mt9t001_get_pad_format(mt9t001, fh, format->pad,
+ format->which);
+ __format->width = __crop->width / hratio;
+ __format->height = __crop->height / vratio;
+
+ format->format = *__format;
+
+ return 0;
+}
+
+static int mt9t001_get_crop(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+
+ crop->rect = *__mt9t001_get_pad_crop(mt9t001, fh, crop->pad,
+ crop->which);
+ return 0;
+}
+
+static int mt9t001_set_crop(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+ struct v4l2_mbus_framefmt *__format;
+ struct v4l2_rect *__crop;
+ struct v4l2_rect rect;
+
+ /* Clamp the crop rectangle boundaries and align them to a multiple of 2
+ * pixels.
+ */
+ rect.left = clamp(ALIGN(crop->rect.left, 2),
+ MT9T001_COLUMN_START_MIN,
+ MT9T001_COLUMN_START_MAX);
+ rect.top = clamp(ALIGN(crop->rect.top, 2),
+ MT9T001_ROW_START_MIN,
+ MT9T001_ROW_START_MAX);
+ rect.width = clamp(ALIGN(crop->rect.width, 2),
+ MT9T001_WINDOW_WIDTH_MIN + 1,
+ MT9T001_WINDOW_WIDTH_MAX + 1);
+ rect.height = clamp(ALIGN(crop->rect.height, 2),
+ MT9T001_WINDOW_HEIGHT_MIN + 1,
+ MT9T001_WINDOW_HEIGHT_MAX + 1);
+
+ rect.width = min(rect.width, MT9T001_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min(rect.height, MT9T001_PIXEL_ARRAY_HEIGHT - rect.top);
+
+ __crop = __mt9t001_get_pad_crop(mt9t001, fh, crop->pad, crop->which);
+
+ if (rect.width != __crop->width || rect.height != __crop->height) {
+ /* Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ __format = __mt9t001_get_pad_format(mt9t001, fh, crop->pad,
+ crop->which);
+ __format->width = rect.width;
+ __format->height = rect.height;
+ }
+
+ *__crop = rect;
+ crop->rect = rect;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev control operations
+ */
+
+#define V4L2_CID_TEST_PATTERN (V4L2_CID_USER_BASE | 0x1001)
+#define V4L2_CID_BLACK_LEVEL_AUTO (V4L2_CID_USER_BASE | 0x1002)
+#define V4L2_CID_BLACK_LEVEL_OFFSET (V4L2_CID_USER_BASE | 0x1003)
+#define V4L2_CID_BLACK_LEVEL_CALIBRATE (V4L2_CID_USER_BASE | 0x1004)
+
+#define V4L2_CID_GAIN_RED (V4L2_CTRL_CLASS_CAMERA | 0x1001)
+#define V4L2_CID_GAIN_GREEN_RED (V4L2_CTRL_CLASS_CAMERA | 0x1002)
+#define V4L2_CID_GAIN_GREEN_BLUE (V4L2_CTRL_CLASS_CAMERA | 0x1003)
+#define V4L2_CID_GAIN_BLUE (V4L2_CTRL_CLASS_CAMERA | 0x1004)
+
+static u16 mt9t001_gain_value(s32 *gain)
+{
+ /* Gain is controlled by 2 analog stages and a digital stage. Valid
+ * values for the 3 stages are
+ *
+ * Stage Min Max Step
+ * ------------------------------------------
+ * First analog stage x1 x2 1
+ * Second analog stage x1 x4 0.125
+ * Digital stage x1 x16 0.125
+ *
+ * To minimize noise, the gain stages should be used in the second
+ * analog stage, first analog stage, digital stage order. Gain from a
+ * previous stage should be pushed to its maximum value before the next
+ * stage is used.
+ */
+ if (*gain <= 32)
+ return *gain;
+
+ if (*gain <= 64) {
+ *gain &= ~1;
+ return (1 << 6) | (*gain >> 1);
+ }
+
+ *gain &= ~7;
+ return ((*gain - 64) << 5) | (1 << 6) | 32;
+}
+
+static int mt9t001_ctrl_freeze(struct mt9t001 *mt9t001, bool freeze)
+{
+ return mt9t001_set_output_control(mt9t001,
+ freeze ? 0 : MT9T001_OUTPUT_CONTROL_SYNC,
+ freeze ? MT9T001_OUTPUT_CONTROL_SYNC : 0);
+}
+
+static int mt9t001_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ static const u8 gains[4] = {
+ MT9T001_RED_GAIN, MT9T001_GREEN1_GAIN,
+ MT9T001_GREEN2_GAIN, MT9T001_BLUE_GAIN
+ };
+
+ struct mt9t001 *mt9t001 =
+ container_of(ctrl->handler, struct mt9t001, ctrls);
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9t001->subdev);
+ unsigned int count;
+ unsigned int i;
+ u16 value;
+ int ret;
+
+ switch (ctrl->id) {
+ case V4L2_CID_GAIN_RED:
+ case V4L2_CID_GAIN_GREEN_RED:
+ case V4L2_CID_GAIN_GREEN_BLUE:
+ case V4L2_CID_GAIN_BLUE:
+
+ /* Disable control updates if more than one control has changed
+ * in the cluster.
+ */
+ for (i = 0, count = 0; i < 4; ++i) {
+ struct v4l2_ctrl *gain = mt9t001->gains[i];
+
+ if (gain->val != gain->cur.val)
+ count++;
+ }
+
+ if (count > 1) {
+ ret = mt9t001_ctrl_freeze(mt9t001, true);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Update the gain controls. */
+ for (i = 0; i < 4; ++i) {
+ struct v4l2_ctrl *gain = mt9t001->gains[i];
+
+ if (gain->val == gain->cur.val)
+ continue;
+
+ value = mt9t001_gain_value(&gain->val);
+ ret = mt9t001_write(client, gains[i], value);
+ if (ret < 0) {
+ mt9t001_ctrl_freeze(mt9t001, false);
+ return ret;
+ }
+ }
+
+ /* Enable control updates. */
+ if (count > 1) {
+ ret = mt9t001_ctrl_freeze(mt9t001, false);
+ if (ret < 0)
+ return ret;
+ }
+
+ break;
+
+ case V4L2_CID_EXPOSURE:
+ ret = mt9t001_write(client, MT9T001_SHUTTER_WIDTH_LOW,
+ ctrl->val & 0xffff);
+ if (ret < 0)
+ return ret;
+
+ return mt9t001_write(client, MT9T001_SHUTTER_WIDTH_HIGH,
+ ctrl->val >> 16);
+
+ case V4L2_CID_TEST_PATTERN:
+ ret = mt9t001_set_output_control(mt9t001,
+ ctrl->val ? 0 : MT9T001_OUTPUT_CONTROL_TEST_DATA,
+ ctrl->val ? MT9T001_OUTPUT_CONTROL_TEST_DATA : 0);
+ if (ret < 0)
+ return ret;
+
+ return mt9t001_write(client, MT9T001_TEST_DATA, ctrl->val << 2);
+
+ case V4L2_CID_BLACK_LEVEL_AUTO:
+ value = ctrl->val ? 0 : MT9T001_BLACK_LEVEL_OVERRIDE;
+ ret = mt9t001_write(client, MT9T001_BLACK_LEVEL_CALIBRATION,
+ value);
+ if (ret < 0)
+ return ret;
+
+ mt9t001->black_level = value;
+ break;
+
+ case V4L2_CID_BLACK_LEVEL_OFFSET:
+ ret = mt9t001_write(client, MT9T001_GREEN1_OFFSET, ctrl->val);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_GREEN2_OFFSET, ctrl->val);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_RED_OFFSET, ctrl->val);
+ if (ret < 0)
+ return ret;
+
+ return mt9t001_write(client, MT9T001_BLUE_OFFSET, ctrl->val);
+
+ case V4L2_CID_BLACK_LEVEL_CALIBRATE:
+ return mt9t001_write(client, MT9T001_BLACK_LEVEL_CALIBRATION,
+ MT9T001_BLACK_LEVEL_RECALCULATE |
+ mt9t001->black_level);
+ }
+
+ return 0;
+}
+
+static struct v4l2_ctrl_ops mt9t001_ctrl_ops = {
+ .s_ctrl = mt9t001_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config mt9t001_ctrls[] = {
+ {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_TEST_PATTERN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Test pattern",
+ .min = 0,
+ .max = 1023,
+ .step = 1,
+ .def = 0,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_BLACK_LEVEL_AUTO,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Black Level, Auto",
+ .min = 0,
+ .max = 1,
+ .step = 1,
+ .def = 1,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_BLACK_LEVEL_OFFSET,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Black Level, Offset",
+ .min = -256,
+ .max = 255,
+ .step = 1,
+ .def = 32,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_BLACK_LEVEL_CALIBRATE,
+ .type = V4L2_CTRL_TYPE_BUTTON,
+ .name = "Black Level, Calibrate",
+ .min = 0,
+ .max = 0,
+ .step = 0,
+ .def = 0,
+ .flags = V4L2_CTRL_FLAG_WRITE_ONLY,
+ },
+};
+
+static const struct v4l2_ctrl_config mt9t001_gains[] = {
+ {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_GAIN_RED,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain, Red",
+ .min = MT9T001_GLOBAL_GAIN_MIN,
+ .max = MT9T001_GLOBAL_GAIN_MAX,
+ .step = 1,
+ .def = MT9T001_GLOBAL_GAIN_MIN,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_GAIN_GREEN_RED,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain, Green (R)",
+ .min = MT9T001_GLOBAL_GAIN_MIN,
+ .max = MT9T001_GLOBAL_GAIN_MAX,
+ .step = 1,
+ .def = MT9T001_GLOBAL_GAIN_MIN,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_GAIN_GREEN_BLUE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain, Green (B)",
+ .min = MT9T001_GLOBAL_GAIN_MIN,
+ .max = MT9T001_GLOBAL_GAIN_MAX,
+ .step = 1,
+ .def = MT9T001_GLOBAL_GAIN_MIN,
+ .flags = 0,
+ }, {
+ .ops = &mt9t001_ctrl_ops,
+ .id = V4L2_CID_GAIN_BLUE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain, Blue",
+ .min = MT9T001_GLOBAL_GAIN_MIN,
+ .max = MT9T001_GLOBAL_GAIN_MAX,
+ .step = 1,
+ .def = MT9T001_GLOBAL_GAIN_MIN,
+ .flags = 0,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev internal operations
+ */
+
+static int mt9t001_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+
+ crop = v4l2_subdev_get_try_crop(fh, 0);
+ crop->left = MT9T001_COLUMN_START_DEF;
+ crop->top = MT9T001_ROW_START_DEF;
+ crop->width = MT9T001_WINDOW_WIDTH_DEF + 1;
+ crop->height = MT9T001_WINDOW_HEIGHT_DEF + 1;
+
+ format = v4l2_subdev_get_try_format(fh, 0);
+ format->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format->width = MT9T001_WINDOW_WIDTH_DEF + 1;
+ format->height = MT9T001_WINDOW_HEIGHT_DEF + 1;
+ format->field = V4L2_FIELD_NONE;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return 0;
+}
+
+static struct v4l2_subdev_video_ops mt9t001_subdev_video_ops = {
+ .s_stream = mt9t001_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops mt9t001_subdev_pad_ops = {
+ .enum_mbus_code = mt9t001_enum_mbus_code,
+ .enum_frame_size = mt9t001_enum_frame_size,
+ .get_fmt = mt9t001_get_format,
+ .set_fmt = mt9t001_set_format,
+ .get_crop = mt9t001_get_crop,
+ .set_crop = mt9t001_set_crop,
+};
+
+static struct v4l2_subdev_ops mt9t001_subdev_ops = {
+ .video = &mt9t001_subdev_video_ops,
+ .pad = &mt9t001_subdev_pad_ops,
+};
+
+static struct v4l2_subdev_internal_ops mt9t001_subdev_internal_ops = {
+ .open = mt9t001_open,
+};
+
+static int mt9t001_video_probe(struct i2c_client *client)
+{
+ struct mt9t001_platform_data *pdata = client->dev.platform_data;
+ s32 data;
+ int ret;
+
+ dev_info(&client->dev, "Probing MT9T001 at address 0x%02x\n",
+ client->addr);
+
+ /* Reset the chip and stop data read out */
+ ret = mt9t001_write(client, MT9T001_RESET, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_RESET, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9t001_write(client, MT9T001_OUTPUT_CONTROL, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Configure the pixel clock polarity */
+ if (pdata && pdata->clk_pol) {
+ ret = mt9t001_write(client, MT9T001_PIXEL_CLOCK,
+ MT9T001_PIXEL_CLOCK_INVERT);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Read and check the sensor version */
+ data = mt9t001_read(client, MT9T001_CHIP_VERSION);
+ if (data != MT9T001_CHIP_ID) {
+ dev_err(&client->dev, "MT9T001 not detected, wrong version "
+ "0x%04x\n", data);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "MT9T001 detected at address 0x%02x\n",
+ client->addr);
+
+ return ret;
+}
+
+static int mt9t001_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct mt9t001 *mt9t001;
+ unsigned int i;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_WORD_DATA)) {
+ dev_warn(&client->adapter->dev,
+ "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+ return -EIO;
+ }
+
+ ret = mt9t001_video_probe(client);
+ if (ret < 0)
+ return ret;
+
+ mt9t001 = kzalloc(sizeof(*mt9t001), GFP_KERNEL);
+ if (!mt9t001)
+ return -ENOMEM;
+
+ v4l2_ctrl_handler_init(&mt9t001->ctrls, ARRAY_SIZE(mt9t001_ctrls) +
+ ARRAY_SIZE(mt9t001_gains) + 2);
+
+ v4l2_ctrl_new_std(&mt9t001->ctrls, &mt9t001_ctrl_ops,
+ V4L2_CID_EXPOSURE, MT9T001_SHUTTER_WIDTH_MIN,
+ MT9T001_SHUTTER_WIDTH_MAX, 1,
+ MT9T001_SHUTTER_WIDTH_DEF);
+ v4l2_ctrl_new_std(&mt9t001->ctrls, &mt9t001_ctrl_ops,
+ V4L2_CID_BLACK_LEVEL, 1, 1, 1, 1);
+
+ for (i = 0; i < ARRAY_SIZE(mt9t001_ctrls); ++i)
+ v4l2_ctrl_new_custom(&mt9t001->ctrls, &mt9t001_ctrls[i], NULL);
+
+ for (i = 0; i < ARRAY_SIZE(mt9t001_gains); ++i)
+ mt9t001->gains[i] = v4l2_ctrl_new_custom(&mt9t001->ctrls,
+ &mt9t001_gains[i], NULL);
+
+ v4l2_ctrl_cluster(ARRAY_SIZE(mt9t001_gains), mt9t001->gains);
+
+ mt9t001->subdev.ctrl_handler = &mt9t001->ctrls;
+
+ if (mt9t001->ctrls.error) {
+ printk(KERN_INFO "%s: control initialization error %d\n",
+ __func__, mt9t001->ctrls.error);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ mt9t001->crop.left = MT9T001_COLUMN_START_DEF;
+ mt9t001->crop.top = MT9T001_ROW_START_DEF;
+ mt9t001->crop.width = MT9T001_WINDOW_WIDTH_DEF + 1;
+ mt9t001->crop.height = MT9T001_WINDOW_HEIGHT_DEF + 1;
+
+ mt9t001->format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ mt9t001->format.width = MT9T001_WINDOW_WIDTH_DEF + 1;
+ mt9t001->format.height = MT9T001_WINDOW_HEIGHT_DEF + 1;
+ mt9t001->format.field = V4L2_FIELD_NONE;
+ mt9t001->format.colorspace = V4L2_COLORSPACE_SRGB;
+
+ v4l2_i2c_subdev_init(&mt9t001->subdev, client, &mt9t001_subdev_ops);
+ mt9t001->subdev.internal_ops = &mt9t001_subdev_internal_ops;
+ mt9t001->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ mt9t001->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_init(&mt9t001->subdev.entity, 1, &mt9t001->pad, 0);
+
+done:
+ if (ret < 0) {
+ v4l2_ctrl_handler_free(&mt9t001->ctrls);
+ media_entity_cleanup(&mt9t001->subdev.entity);
+ kfree(mt9t001);
+ }
+
+ return ret;
+}
+
+static int mt9t001_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+ struct mt9t001 *mt9t001 = to_mt9t001(subdev);
+
+ v4l2_ctrl_handler_free(&mt9t001->ctrls);
+ v4l2_device_unregister_subdev(subdev);
+ media_entity_cleanup(&subdev->entity);
+ kfree(mt9t001);
+ return 0;
+}
+
+static const struct i2c_device_id mt9t001_id[] = {
+ { "mt9t001", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9t001_id);
+
+static struct i2c_driver mt9t001_driver = {
+ .driver = {
+ .name = "mt9t001",
+ },
+ .probe = mt9t001_probe,
+ .remove = mt9t001_remove,
+ .id_table = mt9t001_id,
+};
+
+static int __init mt9t001_init(void)
+{
+ return i2c_add_driver(&mt9t001_driver);
+}
+
+static void __exit mt9t001_exit(void)
+{
+ i2c_del_driver(&mt9t001_driver);
+}
+
+module_init(mt9t001_init);
+module_exit(mt9t001_exit);
+
+MODULE_DESCRIPTION("Aptina (Micron) MT9T001 Camera driver");
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_LICENSE("GPL");
projects / openwrt / staging / blogic.git / commitdiff