[RFC PATCH 5/8] Add support for the MT9V022 camera
- Date: Wed, 23 Jan 2008 18:41:55 +0100 (CET)
- From: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
- Subject: [RFC PATCH 5/8] Add support for the MT9V022 camera
This driver supports Micron MT9V022 colour camera.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
---
drivers/media/video/Kconfig | 14 +
drivers/media/video/Makefile | 1 +
drivers/media/video/mt9v022.c | 751 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 766 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/mt9v022.c
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index def5246..1359f8f 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -818,6 +818,20 @@ config MT9M001_PCA9536_SWITCH
Select this if your MT9M001 camera uses a PCA9536 I2C GPIO
extender to switch between 8 and 10 bit datawidth modes
+config SOC_CAMERA_MT9V022
+ tristate "mt9v022 support"
+ depends on SOC_CAMERA
+ select SENSORS_PCA9536 if MT9V022_PCA9536_SWITCH
+ help
+ This driver supports MT9V022 cameras from Micron
+
+config MT9V022_PCA9536_SWITCH
+ bool "pca9536 datawidth switch for mt9v022"
+ depends on SOC_CAMERA_MT9V022
+ help
+ Select this if your MT9V022 camera uses a PCA9536 I2C GPIO
+ extender to switch between 8 and 10 bit datawidth modes
+
config VIDEO_PXA27X
tristate "PXA27x Quick Capture Interface driver"
depends on VIDEO_DEV && PXA27x
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index c56bfdb..6eaf0ad 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -119,5 +119,6 @@ obj-$(CONFIG_VIDEO_VIVI) += vivi.o
obj-$(CONFIG_VIDEO_PXA27X) += pxa_camera.o
obj-$(CONFIG_SOC_CAMERA) += soc_camera.o
obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o
+obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o
EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
new file mode 100644
index 0000000..d13b965
--- /dev/null
+++ b/drivers/media/video/mt9v022.c
@@ -0,0 +1,751 @@
+/*
+ * Driver for MT9V022 CMOS Image Sensor from Micron
+ *
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@xxxxxxxxxxxxxx>
+ *
+ * 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/videodev.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/log2.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/soc_camera.h>
+
+/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
+ * The platform has to define i2c_board_info
+ * and call i2c_register_board_info() */
+
+static char *sensor_type;
+module_param(sensor_type, charp, S_IRUGO);
+MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"\n");
+
+/* 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_ANALOG_GAIN 0x34
+#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
+
+/* Progressive scan, master, defaults */
+#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
+
+/* must be 32 bit, bitwise coded by reg_to_int and int_to_reg below */
+struct reg_access {
+ u16 value;
+ u8 address;
+ u8 rw;
+} __attribute__ ((packed));
+
+union reg_access_32 {
+ struct reg_access reg;
+ u32 ctrl;
+};
+
+enum reg_rw { REG_READ = 0, REG_WRITE = 1, };
+
+/*
+#define reg_to_int(rw, address, value) ({ \
+ union reg_access_32 u = {.reg = {value, address, rw}}; \
+ u.i32; \
+})
+*/
+
+/* rw has to be numerically most significant, because
+ * maximum, minimum and value are signed */
+#ifdef __LITTLE_ENDIAN
+#define reg_to_int(rw, address, value) (((value) & 0xffff) | (((address) & 0xff) << 16) | (((rw) & 0x7f) << 24))
+#else
+#define reg_to_int(rw, address, value) ((((value) & 0xffff) << 16) | (((address) & 0xff) << 8) | ((rw) & 0x7f))
+#endif
+
+static const struct soc_camera_data_format mt9v022_formats[]= {
+ {
+ .name = "RGB Bayer (sRGB)",
+ .depth = 8,
+ .fourcc = V4L2_PIX_FMT_SBGGR8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ }, {
+ .name = "RGB Bayer (sRGB)",
+ .depth = 10,
+ .fourcc = V4L2_PIX_FMT_SBGGR16,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ }, {
+ .name = "Monochrome 10 bit",
+ .depth = 10,
+ .fourcc = V4L2_PIX_FMT_Y16,
+ }, {
+ .name = "Monochrome 8 bit",
+ .depth = 8,
+ .fourcc = V4L2_PIX_FMT_GREY,
+ },
+};
+
+enum mt9v022_sensor {
+ MT9V022_SENSOR_MONOCHROME,
+ MT9V022_SENSOR_COLOUR,
+};
+
+struct mt9v022 {
+ struct i2c_client *client;
+ struct soc_camera_device icd;
+ enum mt9v022_sensor sensor;
+ struct i2c_client *data_switch;
+ u16 chip_control;
+ unsigned char datawidth;
+};
+
+static int reg_read(struct soc_camera_device *icd, const u8 reg)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ struct i2c_client *client = mt9v022->client;
+ s32 data = i2c_smbus_read_word_data(client, reg);
+ return data < 0 ? data : swab16(data);
+}
+
+static int reg_write(struct soc_camera_device *icd, const u8 reg,
+ const u16 data)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ return i2c_smbus_write_word_data(mt9v022->client, reg, swab16(data));
+}
+
+static int reg_set(struct soc_camera_device *icd, const u8 reg,
+ const u16 data)
+{
+ int ret;
+
+ if ((ret = reg_read(icd, reg)) < 0)
+ return ret;
+ return reg_write(icd, reg, ret | data);
+}
+
+static int reg_clear(struct soc_camera_device *icd, const u8 reg,
+ const u16 data)
+{
+ int ret;
+
+ if ((ret = reg_read(icd, reg)) < 0)
+ return ret;
+ return reg_write(icd, reg, ret & ~data);
+}
+
+static int mt9v022_init(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ 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(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
+ if (ret >= 0)
+ reg_write(icd, MT9V022_READ_MODE, 0x300);
+
+ /* All defaults */
+ if (ret >= 0)
+ ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3); /* AEC, AGC on */
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
+ if (ret >= 0)
+ ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1); /* default - auto */
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0);
+
+ return ret < 0 ? ret :0;
+}
+
+static int mt9v022_release(struct soc_camera_device *icd)
+{
+ /* Nothing? */
+ return 0;
+}
+
+static int mt9v022_start_capture(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ /* Switch to master "normal" mode */
+ mt9v022->chip_control &= ~0x10;
+ if (reg_write(icd, MT9V022_CHIP_CONTROL,
+ mt9v022->chip_control) < 0)
+ return -EIO;
+ return 0;
+}
+
+static int mt9v022_stop_capture(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ /* Switch to snapshot mode */
+// mt9v022->chip_control |= 0x10;
+ if (reg_write(icd, MT9V022_CHIP_CONTROL,
+ mt9v022->chip_control) < 0)
+ return -EIO;
+ return 0;
+}
+
+extern int pca9536_set_level(struct i2c_client *client, u8 pin, u8 level);
+
+static int external_bus_switch(struct i2c_client *extender, int go8bit)
+{
+ if (! extender)
+ return -ENODEV;
+
+#ifdef CONFIG_MT9V022_PCA9536_SWITCH
+ return pca9536_set_level(extender, 0, go8bit);
+#else
+ return -ENODEV;
+#endif
+}
+
+static int mt9v022_set_capture_format(struct soc_camera_device *icd, __u32 pixfmt,
+ struct v4l2_rect *rect, unsigned int flags)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ unsigned int width_flag = flags & (IS_DATAWIDTH_10 | IS_DATAWIDTH_9 |
+ IS_DATAWIDTH_8);
+ u16 pixclk = 0;
+ int ret;
+
+ /* Only one width bit may be set */
+ if (!is_power_of_2(width_flag))
+ return -EINVAL;
+
+ /* The caller provides a supported format, as verified per call to
+ * icd->try_fmt_cap(), datawidth is from our supported format list */
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_GREY:
+ case V4L2_PIX_FMT_Y16:
+ if (mt9v022->sensor != MT9V022_SENSOR_MONOCHROME)
+ return -EINVAL;
+ break;
+ case V4L2_PIX_FMT_SBGGR8:
+ case V4L2_PIX_FMT_SBGGR16:
+ if (mt9v022->sensor != MT9V022_SENSOR_COLOUR)
+ return -EINVAL;
+ break;
+ case 0:
+ /* No format change, only geometry */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Like in example app. Contradicts the datasheet though */
+ ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
+ if (ret >= 0) {
+ if (ret & 1) /* Autoexposure */
+ ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
+ rect->height + icd->y_skip_top + 43);
+ else
+ ret = reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
+ rect->height + icd->y_skip_top + 43);
+ }
+ /* Setup frame format: defaults apart from width and height */
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_COLUMN_START, rect->left);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_ROW_START, rect->top);
+ if (ret >= 0)
+ /* Default 94, Phytec driver says: "width + horizontal blank >= 660" */
+ ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING,
+ rect->width > 660 - 43 ? 43 : 660 - rect->width);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9V022_WINDOW_HEIGHT, rect->height + icd->y_skip_top);
+
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
+
+ if ((mt9v022->datawidth != 10 && (width_flag == IS_DATAWIDTH_10)) ||
+ (mt9v022->datawidth != 9 && (width_flag == IS_DATAWIDTH_9)) ||
+ (mt9v022->datawidth != 8 && (width_flag == IS_DATAWIDTH_8))) {
+ /* data width switch requested */
+ if (! mt9v022->data_switch)
+ return -EINVAL;
+
+ /* Well, we actually only can do 10 or 8 bits... */
+ if (width_flag == IS_DATAWIDTH_9)
+ return -EINVAL;
+
+ ret = external_bus_switch(mt9v022->data_switch,
+ width_flag == IS_DATAWIDTH_8);
+ if (ret < 0)
+ return ret;
+
+ mt9v022->datawidth = width_flag == IS_DATAWIDTH_8 ? 8 : 10;
+ }
+
+ if (flags & IS_PCLK_SAMPLE_RISING)
+ pixclk |= 0x10;
+
+ if (! (flags & IS_HSYNC_ACTIVE_HIGH))
+ pixclk |= 0x1;
+
+ if (! (flags & IS_VSYNC_ACTIVE_HIGH))
+ pixclk |= 0x2;
+
+ if ((ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk)) < 0)
+ return ret;
+
+ if (! (flags & IS_MASTER))
+ mt9v022->chip_control &= ~0x8;
+
+ if ((ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control)) < 0)
+ return ret;
+
+ dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
+ pixclk, mt9v022->chip_control);
+
+ return 0;
+}
+
+static int mt9v022_try_fmt_cap(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ if (f->fmt.pix.height < 32 + icd->y_skip_top)
+ f->fmt.pix.height = 32 + icd->y_skip_top;
+ if (f->fmt.pix.height > 480 + icd->y_skip_top)
+ f->fmt.pix.height = 480 + icd->y_skip_top;
+ if (f->fmt.pix.width < 48)
+ f->fmt.pix.width = 48;
+ if (f->fmt.pix.width > 752)
+ f->fmt.pix.width = 752;
+ f->fmt.pix.width &= ~0x03; /* ? */
+
+ return 0;
+}
+
+static unsigned int mt9v022_get_datawidth(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ return mt9v022->datawidth;
+}
+
+const struct v4l2_queryctrl mt9v022_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_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Horizontally",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ }, {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Analog Gain",
+ .minimum = 64,
+ .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_AUTOGAIN,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Automatic Gain",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ }, {
+ .id = V4L2_CID_AUTOEXPOSURE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Automatic Exposure",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ }, {
+ .id = V4L2_CID_PRIVATE_BASE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Register access",
+ .minimum = reg_to_int(REG_READ, 0, 0),
+ .maximum = reg_to_int(REG_WRITE, 0xff, (1 << 16) - 1),
+ .step = 1,
+ .default_value = 1,
+ }
+};
+
+static int mt9v022_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
+static int mt9v022_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
+
+static struct soc_camera_ops mt9v022_ops = {
+ .owner = THIS_MODULE,
+ .init = mt9v022_init,
+ .release = mt9v022_release,
+ .start_capture = mt9v022_start_capture,
+ .stop_capture = mt9v022_stop_capture,
+ .set_capture_format = mt9v022_set_capture_format,
+ .try_fmt_cap = mt9v022_try_fmt_cap,
+ .formats = mt9v022_formats,
+ .num_formats = ARRAY_SIZE(mt9v022_formats),
+ .get_datawidth = mt9v022_get_datawidth,
+ .controls = mt9v022_controls,
+ .num_controls = ARRAY_SIZE(mt9v022_controls),
+ .get_control = mt9v022_get_control,
+ .set_control = mt9v022_set_control,
+};
+
+static int mt9v022_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
+{
+ int data;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ data = reg_read(icd, MT9V022_READ_MODE);
+ if (data < 0)
+ return -EIO;
+ ctrl->value = !!(data & 0x10);
+ break;
+ case V4L2_CID_HFLIP:
+ data = reg_read(icd, MT9V022_READ_MODE);
+ if (data < 0)
+ return -EIO;
+ ctrl->value = !!(data & 0x20);
+ break;
+ case V4L2_CID_AUTOEXPOSURE:
+ data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
+ if (data < 0)
+ return -EIO;
+ ctrl->value = !!(data & 0x1);
+ break;
+ case V4L2_CID_AUTOGAIN:
+ data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
+ if (data < 0)
+ return -EIO;
+ ctrl->value = !!(data & 0x2);
+ break;
+ case V4L2_CID_PRIVATE_BASE:
+ if (1) {
+ union reg_access_32 u;
+
+ u.ctrl = ctrl->value;
+ if (u.reg.rw != REG_READ)
+ return -EINVAL;
+ data = reg_read(icd, u.reg.address);
+ if (data < 0)
+ return -EIO;
+ u.reg.value = data;
+ ctrl->value = u.ctrl;
+ }
+ }
+ return 0;
+}
+
+static int mt9v022_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
+{
+ int data;
+ const struct v4l2_queryctrl *qctrl;
+
+ qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
+
+ if (!qctrl)
+ return -EINVAL;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ if (ctrl->value)
+ data = reg_set(icd, MT9V022_READ_MODE, 0x10);
+ else
+ data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
+ if (data < 0)
+ return -EIO;
+ break;
+ case V4L2_CID_HFLIP:
+ if (ctrl->value)
+ data = reg_set(icd, MT9V022_READ_MODE, 0x20);
+ else
+ data = reg_clear(icd, MT9V022_READ_MODE, 0x20);
+ if (data < 0)
+ return -EIO;
+ break;
+ case V4L2_CID_GAIN:
+ /* mt9v022 has minimum == default */
+ if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
+ return -EINVAL;
+ else {
+ unsigned long range = qctrl->maximum - qctrl->minimum;
+ /* Datasheet says 16 to 64. autogain only works properly
+ * after setting gain to maximum 14. Larger values
+ * produce "white fly" noise effect. On the whole,
+ * manually setting analog gain does no good. */
+ unsigned long gain = ((ctrl->value - qctrl->minimum) * 10 +
+ range / 2) / range + 4;
+ if (gain >= 32)
+ gain &= ~1;
+ /* The user wants to set gain manually, hope, she
+ * knows, what she's doing... Switch AGC off. */
+
+ if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
+ return -EIO;
+
+ dev_info(&icd->dev, "Setting gain from %d to %lu\n",
+ reg_read(icd, MT9V022_ANALOG_GAIN), gain);
+ if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0)
+ return -EIO;
+ icd->gain = ctrl->value;
+ }
+ break;
+ case V4L2_CID_EXPOSURE:
+ /* mt9v022 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) * 479 +
+ range / 2) / range + 1;
+ /* The user wants to set shutter width manually, hope, she
+ * knows, what she's doing... Switch AEC off. */
+
+ if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
+ return -EIO;
+
+ dev_info(&icd->dev, "Setting shutter width from %d to %lu\n",
+ reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH), shutter);
+ if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH, shutter) < 0)
+ return -EIO;
+ icd->exposure = ctrl->value;
+ }
+ break;
+ case V4L2_CID_AUTOGAIN:
+ if (ctrl->value)
+ data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
+ else
+ data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
+ if (data < 0)
+ return -EIO;
+ break;
+ case V4L2_CID_AUTOEXPOSURE:
+ if (ctrl->value)
+ data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
+ else
+ data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
+ if (data < 0)
+ return -EIO;
+ break;
+ case V4L2_CID_PRIVATE_BASE:
+ if (1) {
+ union reg_access_32 u;
+
+ u.ctrl = ctrl->value;
+ if (u.reg.rw != REG_WRITE)
+ return -EINVAL;
+ data = reg_write(icd, u.reg.address, u.reg.value);
+ if (data < 0)
+ return -EIO;
+ }
+ }
+ 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 mt9v022_video_probe(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+ s32 data;
+ int ret;
+
+ if (!icd->dev.parent ||
+ to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
+ return -ENODEV;
+
+ /* Read out the chip version register */
+ data = reg_read(icd, MT9V022_CHIP_VERSION);
+
+ /* must be 0x1311 or 0x1313 */
+ if (data != 0x1311 && data != 0x1313) {
+ ret = -ENODEV;
+ dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
+ data);
+ goto ei2c;
+ }
+
+ /* Soft reset */
+ ret = reg_write(icd, MT9V022_RESET, 1);
+ if (ret < 0)
+ goto ei2c;
+ /* 15 clock cycles */
+ udelay(200);
+ if (reg_read(icd, MT9V022_RESET)) {
+ dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
+ goto ei2c;
+ }
+
+ /* Set monochrome or colour sensor type */
+ if (sensor_type && (!strcmp("colour", sensor_type) ||
+ !strcmp("color", sensor_type))) {
+ ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
+ mt9v022->sensor = MT9V022_SENSOR_COLOUR;
+ } else {
+ ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
+ mt9v022->sensor = MT9V022_SENSOR_MONOCHROME;
+ }
+
+ if (ret >= 0)
+ ret = soc_camera_video_start(icd);
+ if (ret < 0)
+ goto eisis;
+
+ dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
+ data, mt9v022->sensor == MT9V022_SENSOR_MONOCHROME ?
+ "monochrome" : "colour");
+
+ return 0;
+
+eisis:
+ei2c:
+ return ret;
+}
+
+static void mt9v022_video_remove(struct soc_camera_device *icd)
+{
+ struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+
+ dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
+ mt9v022->icd.dev.parent, mt9v022->icd.vdev);
+ soc_camera_video_stop(&mt9v022->icd);
+}
+
+static int mt9v022_probe(struct i2c_client *client)
+{
+ struct mt9v022 *mt9v022;
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ int ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+ pr_debug("%s: I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n", __FUNCTION__);
+ return -EIO;
+ }
+
+ if (!(mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL)))
+ return -ENOMEM;
+
+ mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
+ mt9v022->client = client;
+ i2c_set_clientdata(client, mt9v022);
+
+ mt9v022->icd.probe = mt9v022_video_probe;
+ mt9v022->icd.remove = mt9v022_video_remove;
+ mt9v022->icd.ops = &mt9v022_ops;
+ mt9v022->icd.control = &client->dev;
+ mt9v022->icd.x_min = 1;
+ mt9v022->icd.y_min = 4;
+ mt9v022->icd.x_current = 1;
+ mt9v022->icd.y_current = 4;
+ mt9v022->icd.width_min = 48;
+ mt9v022->icd.width_max = 752;
+ mt9v022->icd.height_min = 32;
+ mt9v022->icd.height_max = 480;
+ mt9v022->icd.y_skip_top = 1;
+ /* Default datawidth - this is the only width this camera (normally)
+ * supports. It is only with extra logic that it can support
+ * other widths. Therefore it seems to be a sensible default. */
+ mt9v022->datawidth = 10;
+
+ if (client->dev.platform_data) {
+ struct soc_camera_link *icl = client->dev.platform_data;
+ /* We have a data bus switch. We call pca9536 functions
+ * explicitly by name so the driver will not be unloaded,
+ * and we'll check mt9v022->data_switch anyway every time
+ * before calling. The only concern is that the driver
+ * doesn't detach itself from the device, but so far it is
+ * not supported by the I2C layer */
+ if (icl->extender)
+ mt9v022->data_switch = *icl->extender;
+ mt9v022->icd.iface = icl->bus_id;
+ }
+
+ ret = soc_camera_device_register(&mt9v022->icd);
+ if (ret)
+ goto eisdr;
+
+ return 0;
+
+eisdr:
+ kfree(mt9v022);
+ return ret;
+}
+
+static int mt9v022_remove(struct i2c_client *client)
+{
+ struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
+
+ soc_camera_device_unregister(&mt9v022->icd);
+ kfree(mt9v022);
+
+ return 0;
+}
+
+static struct i2c_driver mt9v022_i2c_driver = {
+ .driver = {
+ .name = "mt9v022",
+ },
+ .probe = mt9v022_probe,
+ .remove = mt9v022_remove,
+};
+
+static int __init mt9v022_mod_init(void)
+{
+ return i2c_add_driver(&mt9v022_i2c_driver);
+}
+
+static void __exit mt9v022_mod_exit(void)
+{
+ i2c_del_driver(&mt9v022_i2c_driver);
+}
+
+module_init(mt9v022_mod_init);
+module_exit(mt9v022_mod_exit);
+
+MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@xxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
1.5.3.4
--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list