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70e1d353e5
Multiple fixes: 1. allow register update by setting the Output Control register to 2 and not 3 2. fix scaling factor calculations 3. recover lost HFLIP control 4. fix Global Gain calculation Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
778 lines
20 KiB
C
778 lines
20 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/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, 2);
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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, 2);
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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, 2) < 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, 2) < 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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/* Round up minima and round down maxima */
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static void recalculate_limits(struct soc_camera_device *icd,
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u16 xskip, u16 yskip)
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{
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icd->x_min = (MT9T031_COLUMN_SKIP + xskip - 1) / xskip;
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icd->y_min = (MT9T031_ROW_SKIP + yskip - 1) / yskip;
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icd->width_min = (MT9T031_MIN_WIDTH + xskip - 1) / xskip;
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icd->height_min = (MT9T031_MIN_HEIGHT + yskip - 1) / yskip;
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icd->width_max = MT9T031_MAX_WIDTH / xskip;
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icd->height_max = MT9T031_MAX_HEIGHT / yskip;
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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, ybin, yskip, width, height, left, top;
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if (pixfmt) {
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/*
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* try_fmt has put rectangle within limits.
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* S_FMT - use binning and skipping for scaling, recalculate
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* limits, used for cropping
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*/
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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 <= MT9T031_MAX_WIDTH)
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break;
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for (yskip = 8; yskip > 1; yskip--)
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if (rect->height * yskip <= MT9T031_MAX_HEIGHT)
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break;
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recalculate_limits(icd, xskip, yskip);
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} else {
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/* CROP - no change in scaling, or in limits */
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xskip = mt9t031->xskip;
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yskip = mt9t031->yskip;
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}
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/* Make sure we don't exceed sensor limits */
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if (rect->left + rect->width > icd->width_max)
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rect->left = (icd->width_max - rect->width) / 2 + icd->x_min;
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if (rect->top + rect->height > icd->height_max)
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rect->top = (icd->height_max - rect->height) / 2 + icd->y_min;
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width = rect->width * xskip;
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height = rect->height * yskip;
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left = rect->left * xskip;
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top = rect->top * yskip;
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xbin = min(xskip, (u16)3);
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ybin = min(yskip, (u16)3);
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dev_dbg(&icd->dev, "xskip %u, width %u/%u, yskip %u, height %u/%u\n",
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xskip, width, rect->width, yskip, height, rect->height);
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/* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */
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switch (xbin) {
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case 2:
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left = (left + 3) & ~3;
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break;
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case 3:
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left = roundup(left, 6);
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}
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switch (ybin) {
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case 2:
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top = (top + 3) & ~3;
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break;
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case 3:
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top = roundup(top, 6);
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}
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/* Disable register update, reconfigure atomically */
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ret = reg_set(icd, 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(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 physical left %u, top %u\n", left, 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, left);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_ROW_START, 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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/* Re-enable register update, commit all changes */
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reg_clear(icd, MT9T031_OUTPUT_CONTROL, 1);
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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 < MT9T031_MIN_HEIGHT)
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pix->height = MT9T031_MIN_HEIGHT;
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if (pix->height > MT9T031_MAX_HEIGHT)
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pix->height = MT9T031_MAX_HEIGHT;
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if (pix->width < MT9T031_MIN_WIDTH)
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pix->width = MT9T031_MIN_WIDTH;
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if (pix->width > MT9T031_MAX_WIDTH)
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pix->width = MT9T031_MAX_WIDTH;
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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_dbg_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.addr != 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_dbg_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.addr != 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_dbg_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.addr != 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_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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.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,
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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 int mt9t031_video_probe(struct soc_camera_device *);
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static void mt9t031_video_remove(struct soc_camera_device *);
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static int mt9t031_get_control(struct soc_camera_device *, struct v4l2_control *);
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static int mt9t031_set_control(struct soc_camera_device *, struct v4l2_control *);
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static struct soc_camera_ops mt9t031_ops = {
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.owner = THIS_MODULE,
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.probe = mt9t031_video_probe,
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.remove = mt9t031_video_remove,
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.init = mt9t031_init,
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.release = mt9t031_release,
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.start_capture = mt9t031_start_capture,
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.stop_capture = mt9t031_stop_capture,
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.set_fmt = mt9t031_set_fmt,
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.try_fmt = mt9t031_try_fmt,
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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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.get_control = mt9t031_get_control,
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.set_control = mt9t031_set_control,
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.get_chip_id = mt9t031_get_chip_id,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.get_register = mt9t031_get_register,
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.set_register = mt9t031_set_register,
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#endif
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};
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static int mt9t031_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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int data;
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switch (ctrl->id) {
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case V4L2_CID_VFLIP:
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data = reg_read(icd, MT9T031_READ_MODE_2);
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if (data < 0)
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return -EIO;
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ctrl->value = !!(data & 0x8000);
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break;
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case V4L2_CID_HFLIP:
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data = reg_read(icd, MT9T031_READ_MODE_2);
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if (data < 0)
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return -EIO;
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ctrl->value = !!(data & 0x4000);
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break;
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case V4L2_CID_EXPOSURE_AUTO:
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ctrl->value = mt9t031->autoexposure;
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break;
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}
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return 0;
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}
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static int mt9t031_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
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{
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struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
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const struct v4l2_queryctrl *qctrl;
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int data;
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qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id);
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if (!qctrl)
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return -EINVAL;
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switch (ctrl->id) {
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case V4L2_CID_VFLIP:
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if (ctrl->value)
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data = reg_set(icd, MT9T031_READ_MODE_2, 0x8000);
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else
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data = reg_clear(icd, MT9T031_READ_MODE_2, 0x8000);
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if (data < 0)
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return -EIO;
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break;
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case V4L2_CID_HFLIP:
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if (ctrl->value)
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data = reg_set(icd, MT9T031_READ_MODE_2, 0x4000);
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else
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data = reg_clear(icd, MT9T031_READ_MODE_2, 0x4000);
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if (data < 0)
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return -EIO;
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break;
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case V4L2_CID_GAIN:
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if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
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return -EINVAL;
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/* See Datasheet Table 7, Gain settings. */
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if (ctrl->value <= qctrl->default_value) {
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/* Pack it into 0..1 step 0.125, register values 0..8 */
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unsigned long range = qctrl->default_value - qctrl->minimum;
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data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
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dev_dbg(&icd->dev, "Setting gain %d\n", data);
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data = reg_write(icd, MT9T031_GLOBAL_GAIN, data);
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if (data < 0)
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return -EIO;
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} else {
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/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
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/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
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unsigned long range = qctrl->maximum - qctrl->default_value - 1;
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/* calculated gain: map 65..127 to 9..1024 step 0.125 */
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unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
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1015 + range / 2) / range + 9;
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if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
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data = gain;
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else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
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data = ((gain - 32) * 16 + 16) / 32 + 80;
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else
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/* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
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data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
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dev_dbg(&icd->dev, "Setting gain from 0x%x to 0x%x\n",
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reg_read(icd, MT9T031_GLOBAL_GAIN), data);
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data = reg_write(icd, MT9T031_GLOBAL_GAIN, data);
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if (data < 0)
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return -EIO;
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}
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/* Success */
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icd->gain = ctrl->value;
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break;
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case V4L2_CID_EXPOSURE:
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/* mt9t031 has maximum == default */
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if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
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return -EINVAL;
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else {
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const unsigned long range = qctrl->maximum - qctrl->minimum;
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const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 +
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range / 2) / range + 1;
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u32 old;
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get_shutter(icd, &old);
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dev_dbg(&icd->dev, "Setting shutter width from %u to %u\n",
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old, shutter);
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if (set_shutter(icd, shutter) < 0)
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return -EIO;
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icd->exposure = ctrl->value;
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mt9t031->autoexposure = 0;
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}
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break;
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case V4L2_CID_EXPOSURE_AUTO:
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if (ctrl->value) {
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const u16 vblank = MT9T031_VERTICAL_BLANK;
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const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
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if (set_shutter(icd, icd->height +
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icd->y_skip_top + vblank) < 0)
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return -EIO;
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qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
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icd->exposure = (shutter_max / 2 + (icd->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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mt9t031->autoexposure = 1;
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} else
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mt9t031->autoexposure = 0;
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break;
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}
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return 0;
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}
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/* Interface active, can use i2c. If it fails, it can indeed mean, that
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* this wasn't our capture interface, so, we wait for the right one */
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static int mt9t031_video_probe(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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s32 data;
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int ret;
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/* We must have a parent by now. And it cannot be a wrong one.
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* So this entire test is completely redundant. */
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if (!icd->dev.parent ||
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to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
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return -ENODEV;
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/* Enable the chip */
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data = reg_write(icd, MT9T031_CHIP_ENABLE, 1);
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dev_dbg(&icd->dev, "write: %d\n", data);
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/* Read out the chip version register */
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data = reg_read(icd, MT9T031_CHIP_VERSION);
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switch (data) {
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case 0x1621:
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mt9t031->model = V4L2_IDENT_MT9T031;
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icd->formats = mt9t031_colour_formats;
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icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats);
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break;
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default:
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ret = -ENODEV;
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dev_err(&icd->dev,
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"No MT9T031 chip detected, register read %x\n", data);
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goto ei2c;
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}
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dev_info(&icd->dev, "Detected a MT9T031 chip ID %x\n", data);
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/* Now that we know the model, we can start video */
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ret = soc_camera_video_start(icd);
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if (ret)
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goto evstart;
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return 0;
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evstart:
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ei2c:
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return ret;
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}
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static void mt9t031_video_remove(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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dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9t031->client->addr,
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icd->dev.parent, icd->vdev);
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soc_camera_video_stop(icd);
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}
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static int mt9t031_probe(struct i2c_client *client,
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const struct i2c_device_id *did)
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{
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struct mt9t031 *mt9t031;
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struct soc_camera_device *icd;
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struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
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struct soc_camera_link *icl = client->dev.platform_data;
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int ret;
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if (!icl) {
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dev_err(&client->dev, "MT9T031 driver needs platform data\n");
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return -EINVAL;
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}
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
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dev_warn(&adapter->dev,
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"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
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return -EIO;
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}
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mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL);
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if (!mt9t031)
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return -ENOMEM;
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mt9t031->client = client;
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i2c_set_clientdata(client, mt9t031);
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/* Second stage probe - when a capture adapter is there */
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icd = &mt9t031->icd;
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icd->ops = &mt9t031_ops;
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icd->control = &client->dev;
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icd->x_min = MT9T031_COLUMN_SKIP;
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icd->y_min = MT9T031_ROW_SKIP;
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icd->x_current = icd->x_min;
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icd->y_current = icd->y_min;
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icd->width_min = MT9T031_MIN_WIDTH;
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icd->width_max = MT9T031_MAX_WIDTH;
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icd->height_min = MT9T031_MIN_HEIGHT;
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icd->height_max = MT9T031_MAX_HEIGHT;
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icd->y_skip_top = 0;
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icd->iface = icl->bus_id;
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/* Simulated autoexposure. If enabled, we calculate shutter width
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* ourselves in the driver based on vertical blanking and frame width */
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mt9t031->autoexposure = 1;
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mt9t031->xskip = 1;
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mt9t031->yskip = 1;
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ret = soc_camera_device_register(icd);
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if (ret)
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goto eisdr;
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return 0;
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eisdr:
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i2c_set_clientdata(client, NULL);
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kfree(mt9t031);
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return ret;
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}
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static int mt9t031_remove(struct i2c_client *client)
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{
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struct mt9t031 *mt9t031 = i2c_get_clientdata(client);
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soc_camera_device_unregister(&mt9t031->icd);
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i2c_set_clientdata(client, NULL);
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kfree(mt9t031);
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return 0;
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}
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static const struct i2c_device_id mt9t031_id[] = {
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{ "mt9t031", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, mt9t031_id);
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static struct i2c_driver mt9t031_i2c_driver = {
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.driver = {
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.name = "mt9t031",
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},
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.probe = mt9t031_probe,
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.remove = mt9t031_remove,
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.id_table = mt9t031_id,
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};
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static int __init mt9t031_mod_init(void)
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{
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return i2c_add_driver(&mt9t031_i2c_driver);
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}
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static void __exit mt9t031_mod_exit(void)
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{
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i2c_del_driver(&mt9t031_i2c_driver);
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}
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module_init(mt9t031_mod_init);
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module_exit(mt9t031_mod_exit);
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MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
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MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
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MODULE_LICENSE("GPL v2");
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