V4L/DVB (10099): soc-camera: add support for MT9T031 CMOS camera sensor from Micron
This camera is rather similar to MT9M001, but also has a couple of enhanced features, like pixel binning. create mode 100644 drivers/media/video/mt9t031.c Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski
Mauro Carvalho Chehab
parent
f82a8569bf
commit
4e96fd088c
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@ -741,6 +741,12 @@ config SOC_CAMERA_MT9M111
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help
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This driver supports MT9M111 and MT9M112 cameras from Micron
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config SOC_CAMERA_MT9T031
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tristate "mt9t031 support"
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depends on SOC_CAMERA && I2C
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help
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This driver supports MT9T031 cameras from Micron.
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config SOC_CAMERA_MT9V022
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tristate "mt9v022 support"
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depends on SOC_CAMERA && I2C
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@ -137,6 +137,7 @@ obj-$(CONFIG_VIDEO_OMAP2) += omap2cam.o
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obj-$(CONFIG_SOC_CAMERA) += soc_camera.o
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obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o
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obj-$(CONFIG_SOC_CAMERA_MT9M111) += mt9m111.o
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obj-$(CONFIG_SOC_CAMERA_MT9T031) += mt9t031.o
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obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o
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obj-$(CONFIG_SOC_CAMERA_OV772X) += ov772x.o
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obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o
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@ -0,0 +1,736 @@
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/*
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* Driver for MT9T031 CMOS Image Sensor from Micron
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*
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* Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/videodev2.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/log2.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/soc_camera.h>
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/* mt9t031 i2c address 0x5d
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* The platform has to define i2c_board_info
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* and call i2c_register_board_info() */
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/* mt9t031 selected register addresses */
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#define MT9T031_CHIP_VERSION 0x00
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#define MT9T031_ROW_START 0x01
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#define MT9T031_COLUMN_START 0x02
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#define MT9T031_WINDOW_HEIGHT 0x03
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#define MT9T031_WINDOW_WIDTH 0x04
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#define MT9T031_HORIZONTAL_BLANKING 0x05
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#define MT9T031_VERTICAL_BLANKING 0x06
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#define MT9T031_OUTPUT_CONTROL 0x07
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#define MT9T031_SHUTTER_WIDTH_UPPER 0x08
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#define MT9T031_SHUTTER_WIDTH 0x09
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#define MT9T031_PIXEL_CLOCK_CONTROL 0x0a
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#define MT9T031_FRAME_RESTART 0x0b
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#define MT9T031_SHUTTER_DELAY 0x0c
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#define MT9T031_RESET 0x0d
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#define MT9T031_READ_MODE_1 0x1e
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#define MT9T031_READ_MODE_2 0x20
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#define MT9T031_READ_MODE_3 0x21
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#define MT9T031_ROW_ADDRESS_MODE 0x22
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#define MT9T031_COLUMN_ADDRESS_MODE 0x23
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#define MT9T031_GLOBAL_GAIN 0x35
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#define MT9T031_CHIP_ENABLE 0xF8
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#define MT9T031_MAX_HEIGHT 1536
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#define MT9T031_MAX_WIDTH 2048
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#define MT9T031_MIN_HEIGHT 2
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#define MT9T031_MIN_WIDTH 2
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#define MT9T031_HORIZONTAL_BLANK 142
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#define MT9T031_VERTICAL_BLANK 25
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#define MT9T031_COLUMN_SKIP 32
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#define MT9T031_ROW_SKIP 20
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#define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \
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SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \
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SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \
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SOCAM_MASTER | SOCAM_DATAWIDTH_10)
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static const struct soc_camera_data_format mt9t031_colour_formats[] = {
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{
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.name = "Bayer (sRGB) 10 bit",
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.depth = 10,
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.fourcc = V4L2_PIX_FMT_SGRBG10,
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.colorspace = V4L2_COLORSPACE_SRGB,
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}
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};
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struct mt9t031 {
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struct i2c_client *client;
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struct soc_camera_device icd;
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int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
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unsigned char autoexposure;
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u16 xskip;
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u16 yskip;
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};
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static int reg_read(struct soc_camera_device *icd, const u8 reg)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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struct i2c_client *client = mt9t031->client;
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s32 data = i2c_smbus_read_word_data(client, reg);
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return data < 0 ? data : swab16(data);
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}
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static int reg_write(struct soc_camera_device *icd, const u8 reg,
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const u16 data)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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return i2c_smbus_write_word_data(mt9t031->client, reg, swab16(data));
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}
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static int reg_set(struct soc_camera_device *icd, const u8 reg,
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const u16 data)
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{
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int ret;
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ret = reg_read(icd, reg);
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if (ret < 0)
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return ret;
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return reg_write(icd, reg, ret | data);
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}
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static int reg_clear(struct soc_camera_device *icd, const u8 reg,
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const u16 data)
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{
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int ret;
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ret = reg_read(icd, reg);
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if (ret < 0)
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return ret;
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return reg_write(icd, reg, ret & ~data);
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}
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static int set_shutter(struct soc_camera_device *icd, const u32 data)
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{
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int ret;
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ret = reg_write(icd, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_SHUTTER_WIDTH, data & 0xffff);
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return ret;
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}
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static int get_shutter(struct soc_camera_device *icd, u32 *data)
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{
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int ret;
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ret = reg_read(icd, MT9T031_SHUTTER_WIDTH_UPPER);
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*data = ret << 16;
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if (ret >= 0)
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ret = reg_read(icd, MT9T031_SHUTTER_WIDTH);
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*data |= ret & 0xffff;
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return ret < 0 ? ret : 0;
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}
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static int mt9t031_init(struct soc_camera_device *icd)
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{
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int ret;
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/* Disable chip output, synchronous option update */
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dev_dbg(icd->vdev->parent, "%s\n", __func__);
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ret = reg_write(icd, MT9T031_RESET, 1);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_RESET, 0);
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if (ret >= 0)
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ret = reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3);
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return ret >= 0 ? 0 : -EIO;
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}
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static int mt9t031_release(struct soc_camera_device *icd)
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{
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/* Disable the chip */
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reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3);
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return 0;
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}
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static int mt9t031_start_capture(struct soc_camera_device *icd)
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{
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/* Switch to master "normal" mode */
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if (reg_set(icd, MT9T031_OUTPUT_CONTROL, 3) < 0)
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return -EIO;
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return 0;
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}
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static int mt9t031_stop_capture(struct soc_camera_device *icd)
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{
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/* Stop sensor readout */
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if (reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3) < 0)
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return -EIO;
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return 0;
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}
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static int mt9t031_set_bus_param(struct soc_camera_device *icd,
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unsigned long flags)
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{
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/* The caller should have queried our parameters, check anyway */
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if (flags & ~MT9T031_BUS_PARAM)
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return -EINVAL;
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if (flags & SOCAM_PCLK_SAMPLE_FALLING)
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reg_set(icd, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
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else
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reg_clear(icd, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
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return 0;
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}
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static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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struct soc_camera_link *icl = mt9t031->client->dev.platform_data;
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return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
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}
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static int mt9t031_set_fmt(struct soc_camera_device *icd,
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__u32 pixfmt, struct v4l2_rect *rect)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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int ret;
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const u16 hblank = MT9T031_HORIZONTAL_BLANK,
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vblank = MT9T031_VERTICAL_BLANK;
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u16 xbin, xskip = mt9t031->xskip, ybin, yskip = mt9t031->yskip,
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width = rect->width * xskip, height = rect->height * yskip;
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if (pixfmt) {
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/* S_FMT - use binning and skipping for scaling, recalculate */
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/* Is this more optimal than just a division? */
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for (xskip = 8; xskip > 1; xskip--)
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if (rect->width * xskip <= icd->width_max)
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break;
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for (yskip = 8; yskip > 1; yskip--)
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if (rect->height * yskip <= icd->height_max)
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break;
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width = rect->width * xskip;
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height = rect->height * yskip;
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dev_dbg(&icd->dev, "xskip %u, width %u, yskip %u, height %u\n",
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xskip, width, yskip, height);
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}
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xbin = min(xskip, (u16)3);
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ybin = min(yskip, (u16)3);
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/* Make sure we don't exceed frame limits */
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if (rect->left + width > icd->width_max)
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rect->left = (icd->width_max - width) / 2;
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if (rect->top + height > icd->height_max)
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rect->top = (icd->height_max - height) / 2;
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/* Could just do roundup(rect->left, [xy]bin); but this is cheaper */
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switch (xbin) {
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case 2:
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rect->left = (rect->left + 1) & ~1;
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break;
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case 3:
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rect->left = roundup(rect->left, 3);
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}
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switch (ybin) {
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case 2:
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rect->top = (rect->top + 1) & ~1;
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break;
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case 3:
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rect->top = roundup(rect->top, 3);
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}
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/* Blanking and start values - default... */
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ret = reg_write(icd, MT9T031_HORIZONTAL_BLANKING, hblank);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_VERTICAL_BLANKING, vblank);
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if (pixfmt) {
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/* Binning, skipping */
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_COLUMN_ADDRESS_MODE,
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((xbin - 1) << 4) | (xskip - 1));
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_ROW_ADDRESS_MODE,
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((ybin - 1) << 4) | (yskip - 1));
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}
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dev_dbg(&icd->dev, "new left %u, top %u\n", rect->left, rect->top);
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/* The caller provides a supported format, as guaranteed by
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* icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_COLUMN_START, rect->left);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_ROW_START, rect->top);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_WINDOW_WIDTH, width - 1);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_WINDOW_HEIGHT,
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height + icd->y_skip_top - 1);
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if (ret >= 0 && mt9t031->autoexposure) {
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ret = set_shutter(icd, height + icd->y_skip_top + vblank);
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if (ret >= 0) {
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const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
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const struct v4l2_queryctrl *qctrl =
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soc_camera_find_qctrl(icd->ops,
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V4L2_CID_EXPOSURE);
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icd->exposure = (shutter_max / 2 + (height +
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icd->y_skip_top + vblank - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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shutter_max + qctrl->minimum;
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}
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}
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if (!ret && pixfmt) {
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mt9t031->xskip = xskip;
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mt9t031->yskip = yskip;
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}
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return ret < 0 ? ret : 0;
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}
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static int mt9t031_try_fmt(struct soc_camera_device *icd,
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struct v4l2_format *f)
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{
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struct v4l2_pix_format *pix = &f->fmt.pix;
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if (pix->height < icd->height_min)
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pix->height = icd->height_min;
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if (pix->height > icd->height_max)
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pix->height = icd->height_max;
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if (pix->width < icd->width_min)
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pix->width = icd->width_min;
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if (pix->width > icd->width_max)
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pix->width = icd->width_max;
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pix->width &= ~0x01; /* has to be even */
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pix->height &= ~0x01; /* has to be even */
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return 0;
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}
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static int mt9t031_get_chip_id(struct soc_camera_device *icd,
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struct v4l2_chip_ident *id)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR)
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return -EINVAL;
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if (id->match_chip != mt9t031->client->addr)
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return -ENODEV;
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id->ident = mt9t031->model;
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id->revision = 0;
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return 0;
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int mt9t031_get_register(struct soc_camera_device *icd,
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struct v4l2_register *reg)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
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return -EINVAL;
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if (reg->match_chip != mt9t031->client->addr)
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return -ENODEV;
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reg->val = reg_read(icd, reg->reg);
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if (reg->val > 0xffff)
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return -EIO;
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return 0;
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}
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static int mt9t031_set_register(struct soc_camera_device *icd,
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struct v4l2_register *reg)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
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return -EINVAL;
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if (reg->match_chip != mt9t031->client->addr)
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return -ENODEV;
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if (reg_write(icd, reg->reg, reg->val) < 0)
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return -EIO;
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return 0;
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}
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#endif
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static const struct v4l2_queryctrl mt9t031_controls[] = {
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{
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.id = V4L2_CID_VFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Vertically",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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}, {
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gain",
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.minimum = 0,
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.maximum = 127,
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.step = 1,
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.default_value = 64,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Exposure",
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.minimum = 1,
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.maximum = 255,
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.step = 1,
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.default_value = 255,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE_AUTO,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Automatic Exposure",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 1,
|
||||
}
|
||||
};
|
||||
|
||||
static int mt9t031_video_probe(struct soc_camera_device *);
|
||||
static void mt9t031_video_remove(struct soc_camera_device *);
|
||||
static int mt9t031_get_control(struct soc_camera_device *, struct v4l2_control *);
|
||||
static int mt9t031_set_control(struct soc_camera_device *, struct v4l2_control *);
|
||||
|
||||
static struct soc_camera_ops mt9t031_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.probe = mt9t031_video_probe,
|
||||
.remove = mt9t031_video_remove,
|
||||
.init = mt9t031_init,
|
||||
.release = mt9t031_release,
|
||||
.start_capture = mt9t031_start_capture,
|
||||
.stop_capture = mt9t031_stop_capture,
|
||||
.set_fmt = mt9t031_set_fmt,
|
||||
.try_fmt = mt9t031_try_fmt,
|
||||
.set_bus_param = mt9t031_set_bus_param,
|
||||
.query_bus_param = mt9t031_query_bus_param,
|
||||
.controls = mt9t031_controls,
|
||||
.num_controls = ARRAY_SIZE(mt9t031_controls),
|
||||
.get_control = mt9t031_get_control,
|
||||
.set_control = mt9t031_set_control,
|
||||
.get_chip_id = mt9t031_get_chip_id,
|
||||
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
||||
.get_register = mt9t031_get_register,
|
||||
.set_register = mt9t031_set_register,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int mt9t031_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
|
||||
int data;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
data = reg_read(icd, MT9T031_READ_MODE_2);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x8000);
|
||||
break;
|
||||
case V4L2_CID_HFLIP:
|
||||
data = reg_read(icd, MT9T031_READ_MODE_2);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x4000);
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
ctrl->value = mt9t031->autoexposure;
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt9t031_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
|
||||
const struct v4l2_queryctrl *qctrl;
|
||||
int data;
|
||||
|
||||
qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id);
|
||||
|
||||
if (!qctrl)
|
||||
return -EINVAL;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9T031_READ_MODE_2, 0x8000);
|
||||
else
|
||||
data = reg_clear(icd, MT9T031_READ_MODE_2, 0x8000);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
case V4L2_CID_HFLIP:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9T031_READ_MODE_2, 0x4000);
|
||||
else
|
||||
data = reg_clear(icd, MT9T031_READ_MODE_2, 0x4000);
|
||||
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;
|
||||
|
||||
dev_dbg(&icd->dev, "Setting gain %d\n", data);
|
||||
data = reg_write(icd, MT9T031_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_dbg(&icd->dev, "Setting gain from %d to %d\n",
|
||||
reg_read(icd, MT9T031_GLOBAL_GAIN), data);
|
||||
data = reg_write(icd, MT9T031_GLOBAL_GAIN, data);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Success */
|
||||
icd->gain = ctrl->value;
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE:
|
||||
/* mt9t031 has maximum == default */
|
||||
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
|
||||
return -EINVAL;
|
||||
else {
|
||||
const unsigned long range = qctrl->maximum - qctrl->minimum;
|
||||
const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 +
|
||||
range / 2) / range + 1;
|
||||
u32 old;
|
||||
|
||||
get_shutter(icd, &old);
|
||||
dev_dbg(&icd->dev, "Setting shutter width from %u to %u\n",
|
||||
old, shutter);
|
||||
if (set_shutter(icd, shutter) < 0)
|
||||
return -EIO;
|
||||
icd->exposure = ctrl->value;
|
||||
mt9t031->autoexposure = 0;
|
||||
}
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
if (ctrl->value) {
|
||||
const u16 vblank = MT9T031_VERTICAL_BLANK;
|
||||
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
|
||||
if (set_shutter(icd, icd->height +
|
||||
icd->y_skip_top + vblank) < 0)
|
||||
return -EIO;
|
||||
qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
|
||||
icd->exposure = (shutter_max / 2 + (icd->height +
|
||||
icd->y_skip_top + vblank - 1) *
|
||||
(qctrl->maximum - qctrl->minimum)) /
|
||||
shutter_max + qctrl->minimum;
|
||||
mt9t031->autoexposure = 1;
|
||||
} else
|
||||
mt9t031->autoexposure = 0;
|
||||
break;
|
||||
}
|
||||
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 mt9t031_video_probe(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, 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(icd, MT9T031_CHIP_ENABLE, 1);
|
||||
dev_dbg(&icd->dev, "write: %d\n", data);
|
||||
|
||||
/* Read out the chip version register */
|
||||
data = reg_read(icd, MT9T031_CHIP_VERSION);
|
||||
|
||||
switch (data) {
|
||||
case 0x1621:
|
||||
mt9t031->model = V4L2_IDENT_MT9T031;
|
||||
icd->formats = mt9t031_colour_formats;
|
||||
icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats);
|
||||
break;
|
||||
default:
|
||||
ret = -ENODEV;
|
||||
dev_err(&icd->dev,
|
||||
"No MT9T031 chip detected, register read %x\n", data);
|
||||
goto ei2c;
|
||||
}
|
||||
|
||||
dev_info(&icd->dev, "Detected a MT9T031 chip ID %x\n", data);
|
||||
|
||||
/* Now that we know the model, we can start video */
|
||||
ret = soc_camera_video_start(icd);
|
||||
if (ret)
|
||||
goto evstart;
|
||||
|
||||
return 0;
|
||||
|
||||
evstart:
|
||||
ei2c:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mt9t031_video_remove(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
|
||||
|
||||
dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9t031->client->addr,
|
||||
icd->dev.parent, icd->vdev);
|
||||
soc_camera_video_stop(icd);
|
||||
}
|
||||
|
||||
static int mt9t031_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *did)
|
||||
{
|
||||
struct mt9t031 *mt9t031;
|
||||
struct soc_camera_device *icd;
|
||||
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
||||
struct soc_camera_link *icl = client->dev.platform_data;
|
||||
int ret;
|
||||
|
||||
if (!icl) {
|
||||
dev_err(&client->dev, "MT9T031 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;
|
||||
}
|
||||
|
||||
mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL);
|
||||
if (!mt9t031)
|
||||
return -ENOMEM;
|
||||
|
||||
mt9t031->client = client;
|
||||
i2c_set_clientdata(client, mt9t031);
|
||||
|
||||
/* Second stage probe - when a capture adapter is there */
|
||||
icd = &mt9t031->icd;
|
||||
icd->ops = &mt9t031_ops;
|
||||
icd->control = &client->dev;
|
||||
icd->x_min = MT9T031_COLUMN_SKIP;
|
||||
icd->y_min = MT9T031_ROW_SKIP;
|
||||
icd->x_current = icd->x_min;
|
||||
icd->y_current = icd->y_min;
|
||||
icd->width_min = MT9T031_MIN_WIDTH;
|
||||
icd->width_max = MT9T031_MAX_WIDTH;
|
||||
icd->height_min = MT9T031_MIN_HEIGHT;
|
||||
icd->height_max = MT9T031_MAX_HEIGHT;
|
||||
icd->y_skip_top = 0;
|
||||
icd->iface = icl->bus_id;
|
||||
/* Simulated autoexposure. If enabled, we calculate shutter width
|
||||
* ourselves in the driver based on vertical blanking and frame width */
|
||||
mt9t031->autoexposure = 1;
|
||||
|
||||
mt9t031->xskip = 1;
|
||||
mt9t031->yskip = 1;
|
||||
|
||||
ret = soc_camera_device_register(icd);
|
||||
if (ret)
|
||||
goto eisdr;
|
||||
|
||||
return 0;
|
||||
|
||||
eisdr:
|
||||
i2c_set_clientdata(client, NULL);
|
||||
kfree(mt9t031);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mt9t031_remove(struct i2c_client *client)
|
||||
{
|
||||
struct mt9t031 *mt9t031 = i2c_get_clientdata(client);
|
||||
|
||||
soc_camera_device_unregister(&mt9t031->icd);
|
||||
i2c_set_clientdata(client, NULL);
|
||||
kfree(mt9t031);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id mt9t031_id[] = {
|
||||
{ "mt9t031", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, mt9t031_id);
|
||||
|
||||
static struct i2c_driver mt9t031_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "mt9t031",
|
||||
},
|
||||
.probe = mt9t031_probe,
|
||||
.remove = mt9t031_remove,
|
||||
.id_table = mt9t031_id,
|
||||
};
|
||||
|
||||
static int __init mt9t031_mod_init(void)
|
||||
{
|
||||
return i2c_add_driver(&mt9t031_i2c_driver);
|
||||
}
|
||||
|
||||
static void __exit mt9t031_mod_exit(void)
|
||||
{
|
||||
i2c_del_driver(&mt9t031_i2c_driver);
|
||||
}
|
||||
|
||||
module_init(mt9t031_mod_init);
|
||||
module_exit(mt9t031_mod_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
|
||||
MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -177,6 +177,7 @@ enum {
|
|||
V4L2_IDENT_MT9M112 = 45008,
|
||||
V4L2_IDENT_MT9V022IX7ATC = 45010, /* No way to detect "normal" I77ATx */
|
||||
V4L2_IDENT_MT9V022IX7ATM = 45015, /* and "lead free" IA7ATx chips */
|
||||
V4L2_IDENT_MT9T031 = 45020,
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue