![Wolfram Sang](/assets/img/avatar_default.png)
The i2c-core does this already. Reported-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
935 lines
24 KiB
C
935 lines
24 KiB
C
/*
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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/device.h>
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#include <linux/i2c.h>
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#include <linux/log2.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-subdev.h>
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/*
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* mt9t031 i2c address 0x5d
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* The platform has to define i2c_board_info and link to it from
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* struct soc_camera_link
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*/
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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 18
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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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struct mt9t031 {
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struct v4l2_subdev subdev;
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struct v4l2_rect rect; /* Sensor window */
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int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
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u16 xskip;
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u16 yskip;
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unsigned int gain;
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unsigned short y_skip_top; /* Lines to skip at the top */
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unsigned int exposure;
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unsigned char autoexposure;
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};
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static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
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{
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return container_of(i2c_get_clientdata(client), struct mt9t031, subdev);
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}
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static int reg_read(struct i2c_client *client, const u8 reg)
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{
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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 i2c_client *client, const u8 reg,
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const u16 data)
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{
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return i2c_smbus_write_word_data(client, reg, swab16(data));
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}
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static int reg_set(struct i2c_client *client, 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(client, reg);
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if (ret < 0)
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return ret;
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return reg_write(client, reg, ret | data);
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}
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static int reg_clear(struct i2c_client *client, 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(client, reg);
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if (ret < 0)
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return ret;
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return reg_write(client, reg, ret & ~data);
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}
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static int set_shutter(struct i2c_client *client, const u32 data)
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{
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int ret;
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ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff);
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return ret;
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}
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static int get_shutter(struct i2c_client *client, u32 *data)
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{
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int ret;
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ret = reg_read(client, 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(client, 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_idle(struct i2c_client *client)
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{
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int ret;
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/* Disable chip output, synchronous option update */
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ret = reg_write(client, MT9T031_RESET, 1);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_RESET, 0);
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if (ret >= 0)
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ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
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return ret >= 0 ? 0 : -EIO;
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}
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static int mt9t031_disable(struct i2c_client *client)
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{
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/* Disable the chip */
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reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
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return 0;
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}
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static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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int ret;
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if (enable)
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/* Switch to master "normal" mode */
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ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2);
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else
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/* Stop sensor readout */
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ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
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if (ret < 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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struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
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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_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
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else
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reg_set(client, 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 soc_camera_link *icl = to_soc_camera_link(icd);
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return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
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}
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enum {
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MT9T031_CTRL_VFLIP,
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MT9T031_CTRL_HFLIP,
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MT9T031_CTRL_GAIN,
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MT9T031_CTRL_EXPOSURE,
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MT9T031_CTRL_EXPOSURE_AUTO,
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};
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static const struct v4l2_queryctrl mt9t031_controls[] = {
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[MT9T031_CTRL_VFLIP] = {
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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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[MT9T031_CTRL_HFLIP] = {
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.id = V4L2_CID_HFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Horizontally",
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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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[MT9T031_CTRL_GAIN] = {
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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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[MT9T031_CTRL_EXPOSURE] = {
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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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[MT9T031_CTRL_EXPOSURE_AUTO] = {
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.id = V4L2_CID_EXPOSURE_AUTO,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Automatic Exposure",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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}
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};
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static struct soc_camera_ops mt9t031_ops = {
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.set_bus_param = mt9t031_set_bus_param,
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.query_bus_param = mt9t031_query_bus_param,
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.controls = mt9t031_controls,
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.num_controls = ARRAY_SIZE(mt9t031_controls),
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};
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/* target must be _even_ */
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static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
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{
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unsigned int skip;
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if (*source < target + target / 2) {
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*source = target;
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return 1;
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}
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skip = min(max, *source + target / 2) / target;
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if (skip > 8)
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skip = 8;
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*source = target * skip;
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return skip;
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}
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/* rect is the sensor rectangle, the caller guarantees parameter validity */
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static int mt9t031_set_params(struct i2c_client *client,
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struct v4l2_rect *rect, u16 xskip, u16 yskip)
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{
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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int ret;
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u16 xbin, ybin;
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const u16 hblank = MT9T031_HORIZONTAL_BLANK,
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vblank = MT9T031_VERTICAL_BLANK;
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xbin = min(xskip, (u16)3);
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ybin = min(yskip, (u16)3);
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/*
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* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
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* There is always a valid suitably aligned value. The worst case is
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* xbin = 3, width = 2048. Then we will start at 36, the last read out
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* pixel will be 2083, which is < 2085 - first black pixel.
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*
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* MT9T031 datasheet imposes window left border alignment, depending on
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* the selected xskip. Failing to conform to this requirement produces
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* dark horizontal stripes in the image. However, even obeying to this
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* requirement doesn't eliminate the stripes in all configurations. They
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* appear "locally reproducibly," but can differ between tests under
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* different lighting conditions.
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*/
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switch (xbin) {
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case 1:
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rect->left &= ~1;
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break;
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case 2:
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rect->left &= ~3;
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break;
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case 3:
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rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ?
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(rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6);
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}
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rect->top &= ~1;
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dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
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xskip, yskip, rect->width, rect->height, rect->left, rect->top);
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/* Disable register update, reconfigure atomically */
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ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
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if (ret < 0)
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return ret;
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/* Blanking and start values - default... */
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ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank);
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if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) {
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/* Binning, skipping */
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if (ret >= 0)
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ret = reg_write(client, 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(client, MT9T031_ROW_ADDRESS_MODE,
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((ybin - 1) << 4) | (yskip - 1));
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}
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dev_dbg(&client->dev, "new physical left %u, top %u\n",
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rect->left, rect->top);
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/*
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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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*/
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if (ret >= 0)
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ret = reg_write(client, MT9T031_COLUMN_START, rect->left);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_ROW_START, rect->top);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1);
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if (ret >= 0)
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ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
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rect->height + mt9t031->y_skip_top - 1);
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if (ret >= 0 && mt9t031->autoexposure) {
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unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank;
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ret = set_shutter(client, total_h);
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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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&mt9t031_controls[MT9T031_CTRL_EXPOSURE];
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mt9t031->exposure = (shutter_max / 2 + (total_h - 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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/* Re-enable register update, commit all changes */
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if (ret >= 0)
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ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
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if (ret >= 0) {
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mt9t031->rect = *rect;
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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_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct v4l2_rect rect = a->c;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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rect.width = ALIGN(rect.width, 2);
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rect.height = ALIGN(rect.height, 2);
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soc_camera_limit_side(&rect.left, &rect.width,
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MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH);
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soc_camera_limit_side(&rect.top, &rect.height,
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MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
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return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip);
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}
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static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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a->c = mt9t031->rect;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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return 0;
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}
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static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
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{
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a->bounds.left = MT9T031_COLUMN_SKIP;
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a->bounds.top = MT9T031_ROW_SKIP;
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a->bounds.width = MT9T031_MAX_WIDTH;
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a->bounds.height = MT9T031_MAX_HEIGHT;
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a->defrect = a->bounds;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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a->pixelaspect.numerator = 1;
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a->pixelaspect.denominator = 1;
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return 0;
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}
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static int mt9t031_g_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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mf->width = mt9t031->rect.width / mt9t031->xskip;
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mf->height = mt9t031->rect.height / mt9t031->yskip;
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mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
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mf->colorspace = V4L2_COLORSPACE_SRGB;
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mf->field = V4L2_FIELD_NONE;
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return 0;
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}
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static int mt9t031_s_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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u16 xskip, yskip;
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struct v4l2_rect rect = mt9t031->rect;
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/*
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* try_fmt has put width and height within limits.
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* S_FMT: use binning and skipping for scaling
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*/
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xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH);
|
|
yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT);
|
|
|
|
mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
|
|
mf->colorspace = V4L2_COLORSPACE_SRGB;
|
|
|
|
/* mt9t031_set_params() doesn't change width and height */
|
|
return mt9t031_set_params(client, &rect, xskip, yskip);
|
|
}
|
|
|
|
/*
|
|
* If a user window larger than sensor window is requested, we'll increase the
|
|
* sensor window.
|
|
*/
|
|
static int mt9t031_try_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
v4l_bound_align_image(
|
|
&mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1,
|
|
&mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0);
|
|
|
|
mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
|
|
mf->colorspace = V4L2_COLORSPACE_SRGB;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9t031_g_chip_ident(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_chip_ident *id)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
|
|
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
|
|
return -EINVAL;
|
|
|
|
if (id->match.addr != client->addr)
|
|
return -ENODEV;
|
|
|
|
id->ident = mt9t031->model;
|
|
id->revision = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
static int mt9t031_g_register(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
if (reg->match.addr != client->addr)
|
|
return -ENODEV;
|
|
|
|
reg->val = reg_read(client, reg->reg);
|
|
|
|
if (reg->val > 0xffff)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9t031_s_register(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
if (reg->match.addr != client->addr)
|
|
return -ENODEV;
|
|
|
|
if (reg_write(client, reg->reg, reg->val) < 0)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
int data;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_VFLIP:
|
|
data = reg_read(client, MT9T031_READ_MODE_2);
|
|
if (data < 0)
|
|
return -EIO;
|
|
ctrl->value = !!(data & 0x8000);
|
|
break;
|
|
case V4L2_CID_HFLIP:
|
|
data = reg_read(client, MT9T031_READ_MODE_2);
|
|
if (data < 0)
|
|
return -EIO;
|
|
ctrl->value = !!(data & 0x4000);
|
|
break;
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
ctrl->value = mt9t031->autoexposure;
|
|
break;
|
|
case V4L2_CID_GAIN:
|
|
ctrl->value = mt9t031->gain;
|
|
break;
|
|
case V4L2_CID_EXPOSURE:
|
|
ctrl->value = mt9t031->exposure;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
const struct v4l2_queryctrl *qctrl;
|
|
int data;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_VFLIP:
|
|
if (ctrl->value)
|
|
data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
|
|
else
|
|
data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
|
|
if (data < 0)
|
|
return -EIO;
|
|
break;
|
|
case V4L2_CID_HFLIP:
|
|
if (ctrl->value)
|
|
data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
|
|
else
|
|
data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
|
|
if (data < 0)
|
|
return -EIO;
|
|
break;
|
|
case V4L2_CID_GAIN:
|
|
qctrl = &mt9t031_controls[MT9T031_CTRL_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(&client->dev, "Setting gain %d\n", data);
|
|
data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
|
|
if (data < 0)
|
|
return -EIO;
|
|
} else {
|
|
/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
|
|
/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
|
|
unsigned long range = qctrl->maximum - qctrl->default_value - 1;
|
|
/* calculated gain: map 65..127 to 9..1024 step 0.125 */
|
|
unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
|
|
1015 + range / 2) / range + 9;
|
|
|
|
if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
|
|
data = gain;
|
|
else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
|
|
data = ((gain - 32) * 16 + 16) / 32 + 80;
|
|
else
|
|
/* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
|
|
data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
|
|
|
|
dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n",
|
|
reg_read(client, MT9T031_GLOBAL_GAIN), data);
|
|
data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
|
|
if (data < 0)
|
|
return -EIO;
|
|
}
|
|
|
|
/* Success */
|
|
mt9t031->gain = ctrl->value;
|
|
break;
|
|
case V4L2_CID_EXPOSURE:
|
|
qctrl = &mt9t031_controls[MT9T031_CTRL_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(client, &old);
|
|
dev_dbg(&client->dev, "Set shutter from %u to %u\n",
|
|
old, shutter);
|
|
if (set_shutter(client, shutter) < 0)
|
|
return -EIO;
|
|
mt9t031->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;
|
|
unsigned int total_h = mt9t031->rect.height +
|
|
mt9t031->y_skip_top + vblank;
|
|
|
|
if (set_shutter(client, total_h) < 0)
|
|
return -EIO;
|
|
qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
|
|
mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
|
|
(qctrl->maximum - qctrl->minimum)) /
|
|
shutter_max + qctrl->minimum;
|
|
mt9t031->autoexposure = 1;
|
|
} else
|
|
mt9t031->autoexposure = 0;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Power Management:
|
|
* This function does nothing for now but must be present for pm to work
|
|
*/
|
|
static int mt9t031_runtime_suspend(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Power Management:
|
|
* COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged
|
|
* they are however changed at reset if the platform hook is present
|
|
* thus we rewrite them with the values stored by the driver
|
|
*/
|
|
static int mt9t031_runtime_resume(struct device *dev)
|
|
{
|
|
struct video_device *vdev = to_video_device(dev);
|
|
struct soc_camera_device *icd = container_of(vdev->parent,
|
|
struct soc_camera_device, dev);
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
|
|
int ret;
|
|
u16 xbin, ybin;
|
|
|
|
xbin = min(mt9t031->xskip, (u16)3);
|
|
ybin = min(mt9t031->yskip, (u16)3);
|
|
|
|
ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
|
|
((xbin - 1) << 4) | (mt9t031->xskip - 1));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
|
|
((ybin - 1) << 4) | (mt9t031->yskip - 1));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dev_pm_ops mt9t031_dev_pm_ops = {
|
|
.runtime_suspend = mt9t031_runtime_suspend,
|
|
.runtime_resume = mt9t031_runtime_resume,
|
|
};
|
|
|
|
static struct device_type mt9t031_dev_type = {
|
|
.name = "MT9T031",
|
|
.pm = &mt9t031_dev_pm_ops,
|
|
};
|
|
|
|
/*
|
|
* 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 i2c_client *client)
|
|
{
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
struct video_device *vdev = soc_camera_i2c_to_vdev(client);
|
|
s32 data;
|
|
int ret;
|
|
|
|
/* Enable the chip */
|
|
data = reg_write(client, MT9T031_CHIP_ENABLE, 1);
|
|
dev_dbg(&client->dev, "write: %d\n", data);
|
|
|
|
/* Read out the chip version register */
|
|
data = reg_read(client, MT9T031_CHIP_VERSION);
|
|
|
|
switch (data) {
|
|
case 0x1621:
|
|
mt9t031->model = V4L2_IDENT_MT9T031;
|
|
break;
|
|
default:
|
|
dev_err(&client->dev,
|
|
"No MT9T031 chip detected, register read %x\n", data);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
|
|
|
|
ret = mt9t031_idle(client);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "Failed to initialise the camera\n");
|
|
else
|
|
vdev->dev.type = &mt9t031_dev_type;
|
|
|
|
/* mt9t031_idle() has reset the chip to default. */
|
|
mt9t031->exposure = 255;
|
|
mt9t031->gain = 64;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
|
|
*lines = mt9t031->y_skip_top;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
|
|
.g_ctrl = mt9t031_g_ctrl,
|
|
.s_ctrl = mt9t031_s_ctrl,
|
|
.g_chip_ident = mt9t031_g_chip_ident,
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.g_register = mt9t031_g_register,
|
|
.s_register = mt9t031_s_register,
|
|
#endif
|
|
};
|
|
|
|
static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
|
|
enum v4l2_mbus_pixelcode *code)
|
|
{
|
|
if (index)
|
|
return -EINVAL;
|
|
|
|
*code = V4L2_MBUS_FMT_SBGGR10_1X10;
|
|
return 0;
|
|
}
|
|
|
|
static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
|
|
.s_stream = mt9t031_s_stream,
|
|
.s_mbus_fmt = mt9t031_s_fmt,
|
|
.g_mbus_fmt = mt9t031_g_fmt,
|
|
.try_mbus_fmt = mt9t031_try_fmt,
|
|
.s_crop = mt9t031_s_crop,
|
|
.g_crop = mt9t031_g_crop,
|
|
.cropcap = mt9t031_cropcap,
|
|
.enum_mbus_fmt = mt9t031_enum_fmt,
|
|
};
|
|
|
|
static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = {
|
|
.g_skip_top_lines = mt9t031_g_skip_top_lines,
|
|
};
|
|
|
|
static struct v4l2_subdev_ops mt9t031_subdev_ops = {
|
|
.core = &mt9t031_subdev_core_ops,
|
|
.video = &mt9t031_subdev_video_ops,
|
|
.sensor = &mt9t031_subdev_sensor_ops,
|
|
};
|
|
|
|
static int mt9t031_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *did)
|
|
{
|
|
struct mt9t031 *mt9t031;
|
|
struct soc_camera_device *icd = client->dev.platform_data;
|
|
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
|
int ret;
|
|
|
|
if (icd) {
|
|
struct soc_camera_link *icl = to_soc_camera_link(icd);
|
|
if (!icl) {
|
|
dev_err(&client->dev, "MT9T031 driver needs platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
icd->ops = &mt9t031_ops;
|
|
}
|
|
|
|
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;
|
|
|
|
v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
|
|
|
|
mt9t031->y_skip_top = 0;
|
|
mt9t031->rect.left = MT9T031_COLUMN_SKIP;
|
|
mt9t031->rect.top = MT9T031_ROW_SKIP;
|
|
mt9t031->rect.width = MT9T031_MAX_WIDTH;
|
|
mt9t031->rect.height = MT9T031_MAX_HEIGHT;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
mt9t031_idle(client);
|
|
|
|
ret = mt9t031_video_probe(client);
|
|
|
|
mt9t031_disable(client);
|
|
|
|
if (ret) {
|
|
if (icd)
|
|
icd->ops = NULL;
|
|
kfree(mt9t031);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9t031_remove(struct i2c_client *client)
|
|
{
|
|
struct mt9t031 *mt9t031 = to_mt9t031(client);
|
|
struct soc_camera_device *icd = client->dev.platform_data;
|
|
|
|
if (icd)
|
|
icd->ops = 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");
|