V4L/DVB (7174): Add support for the MT9V022 camera
This driver supports Micron MT9V022 colour camera. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Guennadi Liakhovetski
Mauro Carvalho Chehab
parent
f523dd0da9
commit
7397bfbe10
3 changed files with 819 additions and 0 deletions
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@ -860,6 +860,20 @@ config MT9M001_PCA9536_SWITCH
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Select this if your MT9M001 camera uses a PCA9536 I2C GPIO
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extender to switch between 8 and 10 bit datawidth modes
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config SOC_CAMERA_MT9V022
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tristate "mt9v022 support"
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depends on SOC_CAMERA && GENERIC_GPIO
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select GPIO_PCA953X if MT9V022_PCA9536_SWITCH
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help
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This driver supports MT9V022 cameras from Micron
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config MT9V022_PCA9536_SWITCH
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bool "pca9536 datawidth switch for mt9v022"
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depends on SOC_CAMERA_MT9V022
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help
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Select this if your MT9V022 camera uses a PCA9536 I2C GPIO
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extender to switch between 8 and 10 bit datawidth modes
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config VIDEO_PXA27x
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tristate "PXA27x Quick Capture Interface driver"
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depends on VIDEO_DEV && PXA27x
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@ -139,6 +139,7 @@ obj-$(CONFIG_VIDEO_CX23885) += cx23885/
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obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
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obj-$(CONFIG_SOC_CAMERA) += soc_camera.o
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obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o
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obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o
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EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
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EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
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804
drivers/media/video/mt9v022.c
Normal file
804
drivers/media/video/mt9v022.c
Normal file
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@ -0,0 +1,804 @@
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/*
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* Driver for MT9V022 CMOS Image Sensor from Micron
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*
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.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/delay.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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#include <asm/gpio.h>
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/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
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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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static char *sensor_type;
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module_param(sensor_type, charp, S_IRUGO);
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MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"\n");
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/* mt9v022 selected register addresses */
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#define MT9V022_CHIP_VERSION 0x00
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#define MT9V022_COLUMN_START 0x01
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#define MT9V022_ROW_START 0x02
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#define MT9V022_WINDOW_HEIGHT 0x03
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#define MT9V022_WINDOW_WIDTH 0x04
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#define MT9V022_HORIZONTAL_BLANKING 0x05
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#define MT9V022_VERTICAL_BLANKING 0x06
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#define MT9V022_CHIP_CONTROL 0x07
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#define MT9V022_SHUTTER_WIDTH1 0x08
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#define MT9V022_SHUTTER_WIDTH2 0x09
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#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
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#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
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#define MT9V022_RESET 0x0c
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#define MT9V022_READ_MODE 0x0d
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#define MT9V022_MONITOR_MODE 0x0e
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#define MT9V022_PIXEL_OPERATION_MODE 0x0f
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#define MT9V022_LED_OUT_CONTROL 0x1b
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#define MT9V022_ADC_MODE_CONTROL 0x1c
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#define MT9V022_ANALOG_GAIN 0x34
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#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
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#define MT9V022_PIXCLK_FV_LV 0x74
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#define MT9V022_DIGITAL_TEST_PATTERN 0x7f
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#define MT9V022_AEC_AGC_ENABLE 0xAF
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#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
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/* Progressive scan, master, defaults */
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#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
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static const struct soc_camera_data_format mt9v022_formats[] = {
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{
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.name = "RGB Bayer (sRGB)",
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.depth = 8,
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.fourcc = V4L2_PIX_FMT_SBGGR8,
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.colorspace = V4L2_COLORSPACE_SRGB,
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}, {
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.name = "RGB Bayer (sRGB)",
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.depth = 10,
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.fourcc = V4L2_PIX_FMT_SBGGR16,
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.colorspace = V4L2_COLORSPACE_SRGB,
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}, {
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.name = "Monochrome 10 bit",
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.depth = 10,
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.fourcc = V4L2_PIX_FMT_Y16,
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}, {
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.name = "Monochrome 8 bit",
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.depth = 8,
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.fourcc = V4L2_PIX_FMT_GREY,
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},
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};
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struct mt9v022 {
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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_MT9M001* codes from v4l2-chip-ident.h */
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int switch_gpio;
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u16 chip_control;
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unsigned char datawidth;
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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 mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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struct i2c_client *client = mt9v022->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 mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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return i2c_smbus_write_word_data(mt9v022->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 mt9v022_init(struct soc_camera_device *icd)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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int ret;
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/* Almost the default mode: master, parallel, simultaneous, and an
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* undocumented bit 0x200, which is present in table 7, but not in 8,
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* plus snapshot mode to disable scan for now */
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mt9v022->chip_control |= 0x10;
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ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
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if (ret >= 0)
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reg_write(icd, MT9V022_READ_MODE, 0x300);
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/* All defaults */
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if (ret >= 0)
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/* AEC, AGC on */
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ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
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if (ret >= 0)
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/* default - auto */
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ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0);
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return ret >= 0 ? 0 : -EIO;
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}
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static int mt9v022_release(struct soc_camera_device *icd)
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{
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/* Nothing? */
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return 0;
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}
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static int mt9v022_start_capture(struct soc_camera_device *icd)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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/* Switch to master "normal" mode */
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mt9v022->chip_control &= ~0x10;
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if (reg_write(icd, MT9V022_CHIP_CONTROL,
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mt9v022->chip_control) < 0)
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return -EIO;
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return 0;
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}
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static int mt9v022_stop_capture(struct soc_camera_device *icd)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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/* Switch to snapshot mode */
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mt9v022->chip_control |= 0x10;
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if (reg_write(icd, MT9V022_CHIP_CONTROL,
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mt9v022->chip_control) < 0)
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return -EIO;
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return 0;
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}
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static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl)
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{
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#ifdef CONFIG_MT9V022_PCA9536_SWITCH
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int ret;
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unsigned int gpio = icl->gpio;
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if (gpio != NO_GPIO) {
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/* We have a data bus switch. */
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ret = gpio_request(gpio, "mt9v022");
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if (ret < 0) {
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dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio);
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return ret;
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}
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ret = gpio_direction_output(gpio, 0);
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if (ret < 0) {
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dev_err(&mt9v022->client->dev,
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"Cannot set GPIO %u to output\n", gpio);
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gpio_free(gpio);
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return ret;
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}
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}
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mt9v022->switch_gpio = gpio;
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#else
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mt9v022->switch_gpio = NO_GPIO;
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#endif
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return 0;
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}
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static void bus_switch_release(struct mt9v022 *mt9v022)
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{
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#ifdef CONFIG_MT9V022_PCA9536_SWITCH
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if (mt9v022->switch_gpio != NO_GPIO)
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gpio_free(mt9v022->switch_gpio);
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#endif
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}
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static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit)
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{
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#ifdef CONFIG_MT9V022_PCA9536_SWITCH
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if (mt9v022->switch_gpio == NO_GPIO)
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return -ENODEV;
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gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit);
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return 0;
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#else
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return -ENODEV;
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#endif
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}
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static int mt9v022_set_capture_format(struct soc_camera_device *icd,
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__u32 pixfmt, struct v4l2_rect *rect, unsigned int flags)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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unsigned int width_flag = flags & (IS_DATAWIDTH_10 | IS_DATAWIDTH_9 |
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IS_DATAWIDTH_8);
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u16 pixclk = 0;
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int ret;
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/* Only one width bit may be set */
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if (!is_power_of_2(width_flag))
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return -EINVAL;
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/* The caller provides a supported format, as verified per call to
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* icd->try_fmt_cap(), datawidth is from our supported format list */
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switch (pixfmt) {
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case V4L2_PIX_FMT_GREY:
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case V4L2_PIX_FMT_Y16:
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if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
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return -EINVAL;
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break;
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case V4L2_PIX_FMT_SBGGR8:
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case V4L2_PIX_FMT_SBGGR16:
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if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
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return -EINVAL;
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break;
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case 0:
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/* No format change, only geometry */
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break;
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default:
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return -EINVAL;
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}
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/* Like in example app. Contradicts the datasheet though */
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ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
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if (ret >= 0) {
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if (ret & 1) /* Autoexposure */
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ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
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rect->height + icd->y_skip_top + 43);
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else
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ret = reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
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rect->height + icd->y_skip_top + 43);
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}
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/* Setup frame format: defaults apart from width and height */
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_COLUMN_START, rect->left);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_ROW_START, rect->top);
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if (ret >= 0)
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/* Default 94, Phytec driver says:
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* "width + horizontal blank >= 660" */
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ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING,
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rect->width > 660 - 43 ? 43 :
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660 - rect->width);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width);
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if (ret >= 0)
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ret = reg_write(icd, MT9V022_WINDOW_HEIGHT,
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rect->height + icd->y_skip_top);
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if (ret < 0)
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return ret;
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dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
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if ((mt9v022->datawidth != 10 && (width_flag == IS_DATAWIDTH_10)) ||
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(mt9v022->datawidth != 9 && (width_flag == IS_DATAWIDTH_9)) ||
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(mt9v022->datawidth != 8 && (width_flag == IS_DATAWIDTH_8))) {
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/* data width switch requested */
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if (mt9v022->switch_gpio == NO_GPIO)
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return -EINVAL;
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/* Well, we actually only can do 10 or 8 bits... */
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if (width_flag == IS_DATAWIDTH_9)
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return -EINVAL;
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ret = bus_switch_act(mt9v022,
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width_flag == IS_DATAWIDTH_8);
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if (ret < 0)
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return ret;
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mt9v022->datawidth = width_flag == IS_DATAWIDTH_8 ? 8 : 10;
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}
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if (flags & IS_PCLK_SAMPLE_RISING)
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pixclk |= 0x10;
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if (!(flags & IS_HSYNC_ACTIVE_HIGH))
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pixclk |= 0x1;
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if (!(flags & IS_VSYNC_ACTIVE_HIGH))
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pixclk |= 0x2;
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ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk);
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if (ret < 0)
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return ret;
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if (!(flags & IS_MASTER))
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mt9v022->chip_control &= ~0x8;
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ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
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if (ret < 0)
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return ret;
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dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
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pixclk, mt9v022->chip_control);
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return 0;
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}
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static int mt9v022_try_fmt_cap(struct soc_camera_device *icd,
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struct v4l2_format *f)
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{
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if (f->fmt.pix.height < 32 + icd->y_skip_top)
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f->fmt.pix.height = 32 + icd->y_skip_top;
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if (f->fmt.pix.height > 480 + icd->y_skip_top)
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f->fmt.pix.height = 480 + icd->y_skip_top;
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if (f->fmt.pix.width < 48)
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f->fmt.pix.width = 48;
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if (f->fmt.pix.width > 752)
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f->fmt.pix.width = 752;
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f->fmt.pix.width &= ~0x03; /* ? */
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return 0;
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}
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static int mt9v022_get_chip_id(struct soc_camera_device *icd,
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struct v4l2_chip_ident *id)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR)
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return -EINVAL;
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if (id->match_chip != mt9v022->client->addr)
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return -ENODEV;
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id->ident = mt9v022->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 mt9v022_get_register(struct soc_camera_device *icd,
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struct v4l2_register *reg)
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{
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struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
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if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
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return -EINVAL;
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if (reg->match_chip != mt9v022->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 mt9v022_set_register(struct soc_camera_device *icd,
|
||||
struct v4l2_register *reg)
|
||||
{
|
||||
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
|
||||
|
||||
if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
|
||||
return -EINVAL;
|
||||
|
||||
if (reg->match_chip != mt9v022->client->addr)
|
||||
return -ENODEV;
|
||||
|
||||
if (reg_write(icd, reg->reg, reg->val) < 0)
|
||||
return -EIO;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static unsigned int mt9v022_get_datawidth(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
|
||||
return mt9v022->datawidth;
|
||||
}
|
||||
|
||||
const struct v4l2_queryctrl mt9v022_controls[] = {
|
||||
{
|
||||
.id = V4L2_CID_VFLIP,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Flip Vertically",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 0,
|
||||
}, {
|
||||
.id = V4L2_CID_HFLIP,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Flip Horizontally",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 0,
|
||||
}, {
|
||||
.id = V4L2_CID_GAIN,
|
||||
.type = V4L2_CTRL_TYPE_INTEGER,
|
||||
.name = "Analog Gain",
|
||||
.minimum = 64,
|
||||
.maximum = 127,
|
||||
.step = 1,
|
||||
.default_value = 64,
|
||||
.flags = V4L2_CTRL_FLAG_SLIDER,
|
||||
}, {
|
||||
.id = V4L2_CID_EXPOSURE,
|
||||
.type = V4L2_CTRL_TYPE_INTEGER,
|
||||
.name = "Exposure",
|
||||
.minimum = 1,
|
||||
.maximum = 255,
|
||||
.step = 1,
|
||||
.default_value = 255,
|
||||
.flags = V4L2_CTRL_FLAG_SLIDER,
|
||||
}, {
|
||||
.id = V4L2_CID_AUTOGAIN,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Automatic Gain",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 1,
|
||||
}, {
|
||||
.id = V4L2_CID_EXPOSURE_AUTO,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Automatic Exposure",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 1,
|
||||
}
|
||||
};
|
||||
|
||||
static int mt9v022_get_control(struct soc_camera_device *icd,
|
||||
struct v4l2_control *ctrl);
|
||||
static int mt9v022_set_control(struct soc_camera_device *icd,
|
||||
struct v4l2_control *ctrl);
|
||||
|
||||
static struct soc_camera_ops mt9v022_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.init = mt9v022_init,
|
||||
.release = mt9v022_release,
|
||||
.start_capture = mt9v022_start_capture,
|
||||
.stop_capture = mt9v022_stop_capture,
|
||||
.set_capture_format = mt9v022_set_capture_format,
|
||||
.try_fmt_cap = mt9v022_try_fmt_cap,
|
||||
.formats = mt9v022_formats,
|
||||
.num_formats = ARRAY_SIZE(mt9v022_formats),
|
||||
.get_datawidth = mt9v022_get_datawidth,
|
||||
.controls = mt9v022_controls,
|
||||
.num_controls = ARRAY_SIZE(mt9v022_controls),
|
||||
.get_control = mt9v022_get_control,
|
||||
.set_control = mt9v022_set_control,
|
||||
.get_chip_id = mt9v022_get_chip_id,
|
||||
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
||||
.get_register = mt9v022_get_register,
|
||||
.set_register = mt9v022_set_register,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int mt9v022_get_control(struct soc_camera_device *icd,
|
||||
struct v4l2_control *ctrl)
|
||||
{
|
||||
int data;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
data = reg_read(icd, MT9V022_READ_MODE);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x10);
|
||||
break;
|
||||
case V4L2_CID_HFLIP:
|
||||
data = reg_read(icd, MT9V022_READ_MODE);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x20);
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x1);
|
||||
break;
|
||||
case V4L2_CID_AUTOGAIN:
|
||||
data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x2);
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt9v022_set_control(struct soc_camera_device *icd,
|
||||
struct v4l2_control *ctrl)
|
||||
{
|
||||
int data;
|
||||
const struct v4l2_queryctrl *qctrl;
|
||||
|
||||
qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
|
||||
|
||||
if (!qctrl)
|
||||
return -EINVAL;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9V022_READ_MODE, 0x10);
|
||||
else
|
||||
data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
case V4L2_CID_HFLIP:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9V022_READ_MODE, 0x20);
|
||||
else
|
||||
data = reg_clear(icd, MT9V022_READ_MODE, 0x20);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
case V4L2_CID_GAIN:
|
||||
/* mt9v022 has minimum == default */
|
||||
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
|
||||
return -EINVAL;
|
||||
else {
|
||||
unsigned long range = qctrl->maximum - qctrl->minimum;
|
||||
/* Datasheet says 16 to 64. autogain only works properly
|
||||
* after setting gain to maximum 14. Larger values
|
||||
* produce "white fly" noise effect. On the whole,
|
||||
* manually setting analog gain does no good. */
|
||||
unsigned long gain = ((ctrl->value - qctrl->minimum) *
|
||||
10 + range / 2) / range + 4;
|
||||
if (gain >= 32)
|
||||
gain &= ~1;
|
||||
/* The user wants to set gain manually, hope, she
|
||||
* knows, what she's doing... Switch AGC off. */
|
||||
|
||||
if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
|
||||
return -EIO;
|
||||
|
||||
dev_info(&icd->dev, "Setting gain from %d to %lu\n",
|
||||
reg_read(icd, MT9V022_ANALOG_GAIN), gain);
|
||||
if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0)
|
||||
return -EIO;
|
||||
icd->gain = ctrl->value;
|
||||
}
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE:
|
||||
/* mt9v022 has maximum == default */
|
||||
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
|
||||
return -EINVAL;
|
||||
else {
|
||||
unsigned long range = qctrl->maximum - qctrl->minimum;
|
||||
unsigned long shutter = ((ctrl->value - qctrl->minimum) *
|
||||
479 + range / 2) / range + 1;
|
||||
/* The user wants to set shutter width manually, hope,
|
||||
* she knows, what she's doing... Switch AEC off. */
|
||||
|
||||
if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
|
||||
return -EIO;
|
||||
|
||||
dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
|
||||
reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH),
|
||||
shutter);
|
||||
if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
|
||||
shutter) < 0)
|
||||
return -EIO;
|
||||
icd->exposure = ctrl->value;
|
||||
}
|
||||
break;
|
||||
case V4L2_CID_AUTOGAIN:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
|
||||
else
|
||||
data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
|
||||
else
|
||||
data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Interface active, can use i2c. If it fails, it can indeed mean, that
|
||||
* this wasn't our capture interface, so, we wait for the right one */
|
||||
static int mt9v022_video_probe(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
|
||||
s32 data;
|
||||
int ret;
|
||||
|
||||
if (!icd->dev.parent ||
|
||||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
|
||||
return -ENODEV;
|
||||
|
||||
/* Read out the chip version register */
|
||||
data = reg_read(icd, MT9V022_CHIP_VERSION);
|
||||
|
||||
/* must be 0x1311 or 0x1313 */
|
||||
if (data != 0x1311 && data != 0x1313) {
|
||||
ret = -ENODEV;
|
||||
dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
|
||||
data);
|
||||
goto ei2c;
|
||||
}
|
||||
|
||||
/* Soft reset */
|
||||
ret = reg_write(icd, MT9V022_RESET, 1);
|
||||
if (ret < 0)
|
||||
goto ei2c;
|
||||
/* 15 clock cycles */
|
||||
udelay(200);
|
||||
if (reg_read(icd, MT9V022_RESET)) {
|
||||
dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
|
||||
goto ei2c;
|
||||
}
|
||||
|
||||
/* Set monochrome or colour sensor type */
|
||||
if (sensor_type && (!strcmp("colour", sensor_type) ||
|
||||
!strcmp("color", sensor_type))) {
|
||||
ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
|
||||
mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
|
||||
} else {
|
||||
ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
|
||||
mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
|
||||
}
|
||||
|
||||
if (ret >= 0)
|
||||
ret = soc_camera_video_start(icd);
|
||||
if (ret < 0)
|
||||
goto eisis;
|
||||
|
||||
dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
|
||||
data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
|
||||
"monochrome" : "colour");
|
||||
|
||||
return 0;
|
||||
|
||||
eisis:
|
||||
ei2c:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mt9v022_video_remove(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
|
||||
|
||||
dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
|
||||
mt9v022->icd.dev.parent, mt9v022->icd.vdev);
|
||||
soc_camera_video_stop(&mt9v022->icd);
|
||||
}
|
||||
|
||||
static int mt9v022_probe(struct i2c_client *client)
|
||||
{
|
||||
struct mt9v022 *mt9v022;
|
||||
struct soc_camera_device *icd;
|
||||
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
||||
struct soc_camera_link *icl = client->dev.platform_data;
|
||||
int ret;
|
||||
|
||||
if (!icl) {
|
||||
dev_err(&client->dev, "MT9V022 driver needs platform data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
|
||||
dev_warn(&adapter->dev,
|
||||
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
|
||||
if (!mt9v022)
|
||||
return -ENOMEM;
|
||||
|
||||
mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
|
||||
mt9v022->client = client;
|
||||
i2c_set_clientdata(client, mt9v022);
|
||||
|
||||
icd = &mt9v022->icd;
|
||||
icd->probe = mt9v022_video_probe;
|
||||
icd->remove = mt9v022_video_remove;
|
||||
icd->ops = &mt9v022_ops;
|
||||
icd->control = &client->dev;
|
||||
icd->x_min = 1;
|
||||
icd->y_min = 4;
|
||||
icd->x_current = 1;
|
||||
icd->y_current = 4;
|
||||
icd->width_min = 48;
|
||||
icd->width_max = 752;
|
||||
icd->height_min = 32;
|
||||
icd->height_max = 480;
|
||||
icd->y_skip_top = 1;
|
||||
icd->iface = icl->bus_id;
|
||||
/* Default datawidth - this is the only width this camera (normally)
|
||||
* supports. It is only with extra logic that it can support
|
||||
* other widths. Therefore it seems to be a sensible default. */
|
||||
mt9v022->datawidth = 10;
|
||||
|
||||
ret = bus_switch_request(mt9v022, icl);
|
||||
if (ret)
|
||||
goto eswinit;
|
||||
|
||||
ret = soc_camera_device_register(icd);
|
||||
if (ret)
|
||||
goto eisdr;
|
||||
|
||||
return 0;
|
||||
|
||||
eisdr:
|
||||
bus_switch_release(mt9v022);
|
||||
eswinit:
|
||||
kfree(mt9v022);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mt9v022_remove(struct i2c_client *client)
|
||||
{
|
||||
struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
|
||||
|
||||
soc_camera_device_unregister(&mt9v022->icd);
|
||||
bus_switch_release(mt9v022);
|
||||
kfree(mt9v022);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct i2c_driver mt9v022_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "mt9v022",
|
||||
},
|
||||
.probe = mt9v022_probe,
|
||||
.remove = mt9v022_remove,
|
||||
};
|
||||
|
||||
static int __init mt9v022_mod_init(void)
|
||||
{
|
||||
return i2c_add_driver(&mt9v022_i2c_driver);
|
||||
}
|
||||
|
||||
static void __exit mt9v022_mod_exit(void)
|
||||
{
|
||||
i2c_del_driver(&mt9v022_i2c_driver);
|
||||
}
|
||||
|
||||
module_init(mt9v022_mod_init);
|
||||
module_exit(mt9v022_mod_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
|
||||
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in a new issue