[RFC PATCH 4/8] Add support for the MT9M001 camera
- Date: Wed, 23 Jan 2008 18:41:48 +0100 (CET)
- From: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
- Subject: [RFC PATCH 4/8] Add support for the MT9M001 camera
This driver supports Micron MT9M001 monochrome and colour cameras.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
---
drivers/media/video/Kconfig | 15 +
drivers/media/video/Makefile | 1 +
drivers/media/video/mt9m001.c | 649 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 665 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/mt9m001.c
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index dc0dfec..def5246 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -803,6 +803,21 @@ config SOC_CAMERA
over a bus like PCI or USB. For example some i2c camera hanging
directly on the data bus of an SoC.
+config SOC_CAMERA_MT9M001
+ tristate "mt9m001 support"
+ depends on SOC_CAMERA
+ select SENSORS_PCA9536 if MT9M001_PCA9536_SWITCH
+ help
+ This driver supports MT9M001 cameras from Micron, monochrome
+ and colour models.
+
+config MT9M001_PCA9536_SWITCH
+ bool "pca9536 datawidth switch for mt9m001"
+ depends on SOC_CAMERA_MT9M001
+ help
+ Select this if your MT9M001 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 81b7cd6..c56bfdb 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -118,5 +118,6 @@ 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
EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
new file mode 100644
index 0000000..dc4cc8f
--- /dev/null
+++ b/drivers/media/video/mt9m001.c
@@ -0,0 +1,649 @@
+/*
+ * Driver for MT9M001 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/log2.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/soc_camera.h>
+
+/* mt9m001 i2c address 0x5d
+ * The platform has to define i2c_board_info
+ * and call i2c_register_board_info() */
+
+/* mt9m001 selected register addresses */
+#define MT9M001_CHIP_VERSION 0x00
+#define MT9M001_ROW_START 0x01
+#define MT9M001_COLUMN_START 0x02
+#define MT9M001_WINDOW_HEIGHT 0x03
+#define MT9M001_WINDOW_WIDTH 0x04
+#define MT9M001_HORIZONTAL_BLANKING 0x05
+#define MT9M001_VERTICAL_BLANKING 0x06
+#define MT9M001_OUTPUT_CONTROL 0x07
+#define MT9M001_SHUTTER_WIDTH 0x09
+#define MT9M001_FRAME_RESTART 0x0b
+#define MT9M001_SHUTTER_DELAY 0x0c
+#define MT9M001_RESET 0x0d
+#define MT9M001_READ_OPTIONS1 0x1e
+#define MT9M001_READ_OPTIONS2 0x20
+#define MT9M001_GLOBAL_GAIN 0x35
+#define MT9M001_CHIP_ENABLE 0xF1
+
+/* 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 mt9m001_colour_formats[]= {
+ {
+ .name = "RGB Bayer (sRGB)",
+ .depth = 16,
+ .fourcc = V4L2_PIX_FMT_SBGGR8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ }
+};
+
+static const struct soc_camera_data_format mt9m001_monochrome_formats[]= {
+ {
+ .name = "Monochrome 10 bit",
+ .depth = 10,
+ .fourcc = V4L2_PIX_FMT_Y16,
+ }, {
+ .name = "Monochrome 8 bit",
+ .depth = 8,
+ .fourcc = V4L2_PIX_FMT_GREY,
+ },
+};
+
+enum mt9m001_model {
+ MT9M001C12ST,
+ MT9M001C12STM
+};
+
+struct mt9m001 {
+ struct i2c_client *client;
+ struct soc_camera_device icd;
+ enum mt9m001_model model;
+ struct i2c_client *data_switch;
+ unsigned char autoexposure;
+ unsigned char datawidth;
+};
+
+static int reg_read(struct soc_camera_device *icd, const u8 reg)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ struct i2c_client *client = mt9m001->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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ return i2c_smbus_write_word_data(mt9m001->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 mt9m001_init(struct soc_camera_device *icd)
+{
+ int ret;
+
+ /* Disable chip, synchronous option update */
+ dev_dbg(icd->vdev->dev, "%s\n", __FUNCTION__);
+
+ ret = reg_write(icd, MT9M001_RESET, 1);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_RESET, 0);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
+
+ return ret >= 0 ? 0 : -EIO;
+}
+
+static int mt9m001_release(struct soc_camera_device *icd)
+{
+ /* Disable the chip */
+ reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
+ return 0;
+}
+
+static int mt9m001_start_capture(struct soc_camera_device *icd)
+{
+ /* Switch to master "normal" mode */
+ if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 2) < 0)
+ return -EIO;
+ return 0;
+}
+
+static int mt9m001_stop_capture(struct soc_camera_device *icd)
+{
+ /* Stop sensor readout */
+ if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 0) < 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_MT9M001_PCA9536_SWITCH
+ return pca9536_set_level(extender, 0, go8bit);
+#else
+ return -ENODEV;
+#endif
+}
+
+static int mt9m001_set_capture_format(struct soc_camera_device *icd, __u32 pixfmt,
+ struct v4l2_rect *rect, unsigned int flags)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ unsigned int width_flag = flags & (IS_DATAWIDTH_10 | IS_DATAWIDTH_9 |
+ IS_DATAWIDTH_8);
+ int ret;
+ const u16 hblank = 9, vblank = 25;
+
+ /* MT9M001 has all capture_format parameters fixed */
+ if (! (flags & IS_MASTER) ||
+ ! (flags & IS_PCLK_SAMPLE_RISING) ||
+ ! (flags & IS_HSYNC_ACTIVE_HIGH) ||
+ ! (flags & IS_VSYNC_ACTIVE_HIGH)) {
+ return -EINVAL;
+ }
+
+ /* Only one width bit may be set */
+ if (!is_power_of_2(width_flag))
+ return -EINVAL;
+
+ if ((mt9m001->datawidth != 10 && (width_flag == IS_DATAWIDTH_10)) ||
+ (mt9m001->datawidth != 9 && (width_flag == IS_DATAWIDTH_9)) ||
+ (mt9m001->datawidth != 8 && (width_flag == IS_DATAWIDTH_8))) {
+ /* data width switch requested */
+ if (! mt9m001->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(mt9m001->data_switch,
+ width_flag == IS_DATAWIDTH_8);
+ if (ret < 0)
+ return ret;
+
+ mt9m001->datawidth = width_flag == IS_DATAWIDTH_8 ? 8 : 10;
+ }
+
+ /* Blanking and start values - default... */
+ ret = reg_write(icd, MT9M001_HORIZONTAL_BLANKING, hblank);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_VERTICAL_BLANKING, vblank);
+
+ /* The caller provides a supported format, as verified per
+ * call to icd->try_fmt_cap() */
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_ROW_START, rect->top);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
+ if (ret >= 0)
+ ret = reg_write(icd, MT9M001_WINDOW_HEIGHT, rect->height + icd->y_skip_top - 1);
+ if (ret >= 0 && mt9m001->autoexposure) {
+ ret = reg_write(icd, MT9M001_SHUTTER_WIDTH, rect->height + icd->y_skip_top + vblank);
+ if (ret >= 0) {
+ const struct v4l2_queryctrl *qctrl =
+ soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
+ icd->exposure = (524 + (rect->height + icd->y_skip_top + vblank - 1) *
+ (qctrl->maximum - qctrl->minimum)) /
+ 1048 + qctrl->minimum;
+ }
+ }
+
+ return ret < 0 ? ret : 0;
+}
+
+static int mt9m001_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 > 1024 + icd->y_skip_top)
+ f->fmt.pix.height = 1024 + icd->y_skip_top;
+ if (f->fmt.pix.width < 48)
+ f->fmt.pix.width = 48;
+ if (f->fmt.pix.width > 1280)
+ f->fmt.pix.width = 1280;
+ f->fmt.pix.width &= ~0x01; /* has to be even, unsure why was ~3 */
+
+ return 0;
+}
+
+static unsigned int mt9m001_get_datawidth(struct soc_camera_device *icd)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ return mt9m001->datawidth;
+}
+
+const struct v4l2_queryctrl mt9m001_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_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .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_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 mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
+static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
+
+static struct soc_camera_ops mt9m001_ops = {
+ .owner = THIS_MODULE,
+ .init = mt9m001_init,
+ .release = mt9m001_release,
+ .start_capture = mt9m001_start_capture,
+ .stop_capture = mt9m001_stop_capture,
+ .set_capture_format = mt9m001_set_capture_format,
+ .try_fmt_cap = mt9m001_try_fmt_cap,
+ .formats = NULL, /* Filled in later depending on the */
+ .num_formats = 0, /* camera type and data widths */
+ .get_datawidth = mt9m001_get_datawidth,
+ .controls = mt9m001_controls,
+ .num_controls = ARRAY_SIZE(mt9m001_controls),
+ .get_control = mt9m001_get_control,
+ .set_control = mt9m001_set_control,
+};
+
+static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ int data;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ data = reg_read(icd, MT9M001_READ_OPTIONS2);
+ if (data < 0)
+ return -EIO;
+ ctrl->value = !!(data & 0x8000);
+ break;
+ case V4L2_CID_AUTOEXPOSURE:
+ ctrl->value = mt9m001->autoexposure;
+ 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 mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ const struct v4l2_queryctrl *qctrl;
+ int data;
+
+ qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
+
+ if (!qctrl)
+ return -EINVAL;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ if (ctrl->value)
+ data = reg_set(icd, MT9M001_READ_OPTIONS2, 0x8000);
+ else
+ data = reg_clear(icd, MT9M001_READ_OPTIONS2, 0x8000);
+ if (data < 0)
+ return -EIO;
+ break;
+ case V4L2_CID_GAIN:
+ if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
+ return -EINVAL;
+ /* See Datasheet Table 7, Gain settings. */
+ if (ctrl->value <= qctrl->default_value) {
+ /* Pack it into 0..1 step 0.125, register values 0..8 */
+ unsigned long range = qctrl->default_value - qctrl->minimum;
+ data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
+
+ printk("Setting gain %d\n", data);
+ data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
+ if (data < 0)
+ return -EIO;
+ } else {
+ /* Pack it into 1.125..15 variable step, register values 9..67 */
+ /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
+ unsigned long range = qctrl->maximum - qctrl->default_value - 1;
+ unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
+ 111 + range / 2) / range + 9;
+
+ if (gain <= 32)
+ data = gain;
+ else if (gain <= 64)
+ data = ((gain - 32) * 16 + 16) / 32 + 80;
+ else
+ data = ((gain - 64) * 7 + 28) / 56 + 96;
+
+ dev_info(&icd->dev, "Setting gain from %d to %d\n",
+ reg_read(icd, MT9M001_GLOBAL_GAIN), data);
+ data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
+ if (data < 0)
+ return -EIO;
+ }
+
+ /* Success */
+ icd->gain = ctrl->value;
+ break;
+ case V4L2_CID_EXPOSURE:
+ /* mt9m001 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) * 1048 +
+ range / 2) / range + 1;
+
+ dev_info(&icd->dev, "Setting shutter width from %d to %lu\n",
+ reg_read(icd, MT9M001_SHUTTER_WIDTH), shutter);
+ if (reg_write(icd, MT9M001_SHUTTER_WIDTH, shutter) < 0)
+ return -EIO;
+ icd->exposure = ctrl->value;
+ mt9m001->autoexposure = 0;
+ }
+ break;
+ case V4L2_CID_AUTOEXPOSURE:
+ if (ctrl->value) {
+ const u16 vblank = 25;
+ if (reg_write(icd, MT9M001_SHUTTER_WIDTH, icd->height +
+ icd->y_skip_top + vblank) < 0)
+ return -EIO;
+ qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
+ icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) *
+ (qctrl->maximum - qctrl->minimum)) /
+ 1048 + qctrl->minimum;
+ mt9m001->autoexposure = 1;
+ } else
+ mt9m001->autoexposure = 0;
+ 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 mt9m001_video_probe(struct soc_camera_device *icd)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+ s32 data;
+ int ret;
+
+ /* We must have a parent by now. And it cannot be a wrong one.
+ * So this entire test is completely redundant. */
+ if (!icd->dev.parent ||
+ to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
+ return -ENODEV;
+
+ /* Enable the chip */
+ data = reg_write(&mt9m001->icd, MT9M001_CHIP_ENABLE, 1);
+ dev_dbg(&icd->dev, "write: %d\n", data);
+
+ /* Read out the chip version register */
+ data = reg_read(icd, MT9M001_CHIP_VERSION);
+
+ /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
+ switch (data) {
+ case 0x8411:
+ case 0x8421:
+ mt9m001->model = MT9M001C12ST;
+ mt9m001_ops.formats = mt9m001_colour_formats;
+ mt9m001_ops.num_formats = ARRAY_SIZE(mt9m001_colour_formats);
+ break;
+ case 0x8431:
+ mt9m001->model = MT9M001C12STM;
+ mt9m001_ops.formats = mt9m001_monochrome_formats;
+ if (mt9m001->client->dev.platform_data)
+ mt9m001_ops.num_formats = ARRAY_SIZE(mt9m001_monochrome_formats);
+ else
+ mt9m001_ops.num_formats = 1;
+ break;
+ default:
+ ret = -ENODEV;
+ dev_err(&icd->dev,
+ "No MT9M001 chip detected, register read %x\n", data);
+ goto ei2c;
+ }
+
+ dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
+ data == 0x8431 ? "C12STM" : "C12ST");
+
+ /* Now that we know the model, we can start video */
+ ret = soc_camera_video_start(icd);
+ if (ret)
+ goto eisis;
+
+ return 0;
+
+eisis:
+ei2c:
+ return ret;
+}
+
+static void mt9m001_video_remove(struct soc_camera_device *icd)
+{
+ struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+
+ dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m001->client->addr,
+ mt9m001->icd.dev.parent, mt9m001->icd.vdev);
+ soc_camera_video_stop(&mt9m001->icd);
+}
+
+static int mt9m001_probe(struct i2c_client *client)
+{
+ struct mt9m001 *mt9m001;
+ 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 (!(mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL)))
+ return -ENOMEM;
+
+ mt9m001->client = client;
+ i2c_set_clientdata(client, mt9m001);
+
+ /* Second stage probe - when a capture adapter is there */
+ mt9m001->icd.probe = mt9m001_video_probe;
+ mt9m001->icd.remove = mt9m001_video_remove;
+ mt9m001->icd.ops = &mt9m001_ops;
+ mt9m001->icd.control = &client->dev;
+ mt9m001->icd.x_min = 20;
+ mt9m001->icd.y_min = 12;
+ mt9m001->icd.x_current = 20;
+ mt9m001->icd.y_current = 12;
+ mt9m001->icd.width_min = 48;
+ mt9m001->icd.width_max = 1280;
+ mt9m001->icd.height_min = 32;
+ mt9m001->icd.height_max = 1024;
+ mt9m001->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. */
+ mt9m001->datawidth = 10;
+ /* Simulated autoexposure. If enabled, we calculate shutter width
+ * ourselves in the driver based on vertical blanking and frame width */
+ mt9m001->autoexposure = 1;
+
+ 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 mt9m001->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)
+ mt9m001->data_switch = *icl->extender;
+ mt9m001->icd.iface = icl->bus_id;
+ }
+
+ ret = soc_camera_device_register(&mt9m001->icd);
+ if (ret)
+ goto eisdr;
+
+ return 0;
+
+eisdr:
+ kfree(mt9m001);
+ return ret;
+}
+
+static int mt9m001_remove(struct i2c_client *client)
+{
+ struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
+
+ soc_camera_device_unregister(&mt9m001->icd);
+ kfree(mt9m001);
+
+ return 0;
+}
+
+static struct i2c_driver mt9m001_i2c_driver = {
+ .driver = {
+ .name = "mt9m001",
+ },
+ .probe = mt9m001_probe,
+ .remove = mt9m001_remove,
+};
+
+static int __init mt9m001_mod_init(void)
+{
+ return i2c_add_driver(&mt9m001_i2c_driver);
+}
+
+static void __exit mt9m001_mod_exit(void)
+{
+ i2c_del_driver(&mt9m001_i2c_driver);
+}
+
+module_init(mt9m001_mod_init);
+module_exit(mt9m001_mod_exit);
+
+MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@xxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
1.5.3.4
--
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