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V4L/DVB (7173): Add support for the MT9M001 camera
This driver supports Micron MT9M001 monochrome and colour cameras. 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
3bc43840c3
commit
f523dd0da9
@ -845,6 +845,21 @@ config SOC_CAMERA
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over a bus like PCI or USB. For example some i2c camera connected
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directly to the data bus of an SoC.
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config SOC_CAMERA_MT9M001
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tristate "mt9m001 support"
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depends on SOC_CAMERA && GENERIC_GPIO
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select GPIO_PCA953X if MT9M001_PCA9536_SWITCH
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help
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This driver supports MT9M001 cameras from Micron, monochrome
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and colour models.
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config MT9M001_PCA9536_SWITCH
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bool "pca9536 datawidth switch for mt9m001"
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depends on SOC_CAMERA_MT9M001
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help
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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 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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@ -138,6 +138,7 @@ 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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EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
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EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
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694
drivers/media/video/mt9m001.c
Normal file
694
drivers/media/video/mt9m001.c
Normal file
@ -0,0 +1,694 @@
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/*
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* Driver for MT9M001 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/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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/* mt9m001 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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/* mt9m001 selected register addresses */
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#define MT9M001_CHIP_VERSION 0x00
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#define MT9M001_ROW_START 0x01
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#define MT9M001_COLUMN_START 0x02
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#define MT9M001_WINDOW_HEIGHT 0x03
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#define MT9M001_WINDOW_WIDTH 0x04
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#define MT9M001_HORIZONTAL_BLANKING 0x05
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#define MT9M001_VERTICAL_BLANKING 0x06
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#define MT9M001_OUTPUT_CONTROL 0x07
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#define MT9M001_SHUTTER_WIDTH 0x09
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#define MT9M001_FRAME_RESTART 0x0b
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#define MT9M001_SHUTTER_DELAY 0x0c
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#define MT9M001_RESET 0x0d
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#define MT9M001_READ_OPTIONS1 0x1e
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#define MT9M001_READ_OPTIONS2 0x20
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#define MT9M001_GLOBAL_GAIN 0x35
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#define MT9M001_CHIP_ENABLE 0xF1
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static const struct soc_camera_data_format mt9m001_colour_formats[] = {
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{
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.name = "RGB Bayer (sRGB)",
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.depth = 16,
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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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};
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static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
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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 mt9m001 {
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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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unsigned char autoexposure;
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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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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struct i2c_client *client = mt9m001->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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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return i2c_smbus_write_word_data(mt9m001->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 mt9m001_init(struct soc_camera_device *icd)
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{
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int ret;
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/* Disable chip, synchronous option update */
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dev_dbg(icd->vdev->dev, "%s\n", __FUNCTION__);
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ret = reg_write(icd, MT9M001_RESET, 1);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_RESET, 0);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
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return ret >= 0 ? 0 : -EIO;
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}
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static int mt9m001_release(struct soc_camera_device *icd)
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{
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/* Disable the chip */
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reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
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return 0;
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}
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static int mt9m001_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_write(icd, MT9M001_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 mt9m001_stop_capture(struct soc_camera_device *icd)
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{
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/* Stop sensor readout */
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if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 0) < 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 mt9m001 *mt9m001,
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struct soc_camera_link *icl)
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{
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#ifdef CONFIG_MT9M001_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, "mt9m001");
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if (ret < 0) {
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dev_err(&mt9m001->client->dev, "Cannot get GPIO %u\n",
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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(&mt9m001->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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mt9m001->switch_gpio = gpio;
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#else
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mt9m001->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 mt9m001 *mt9m001)
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{
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#ifdef CONFIG_MT9M001_PCA9536_SWITCH
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if (mt9m001->switch_gpio != NO_GPIO)
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gpio_free(mt9m001->switch_gpio);
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#endif
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}
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static int bus_switch_act(struct mt9m001 *mt9m001, int go8bit)
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{
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#ifdef CONFIG_MT9M001_PCA9536_SWITCH
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if (mt9m001->switch_gpio == NO_GPIO)
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return -ENODEV;
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gpio_set_value_cansleep(mt9m001->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 mt9m001_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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, 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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int ret;
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const u16 hblank = 9, vblank = 25;
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/* MT9M001 has all capture_format parameters fixed */
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if (!(flags & IS_MASTER) ||
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!(flags & IS_PCLK_SAMPLE_RISING) ||
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!(flags & IS_HSYNC_ACTIVE_HIGH) ||
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!(flags & IS_VSYNC_ACTIVE_HIGH))
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return -EINVAL;
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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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if ((mt9m001->datawidth != 10 && (width_flag == IS_DATAWIDTH_10)) ||
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(mt9m001->datawidth != 9 && (width_flag == IS_DATAWIDTH_9)) ||
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(mt9m001->datawidth != 8 && (width_flag == IS_DATAWIDTH_8))) {
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/* data width switch requested */
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if (mt9m001->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(mt9m001,
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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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mt9m001->datawidth = width_flag == IS_DATAWIDTH_8 ? 8 : 10;
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}
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/* Blanking and start values - default... */
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ret = reg_write(icd, MT9M001_HORIZONTAL_BLANKING, hblank);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_VERTICAL_BLANKING, vblank);
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/* The caller provides a supported format, as verified per
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* call to icd->try_fmt_cap() */
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_ROW_START, rect->top);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
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if (ret >= 0)
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ret = reg_write(icd, MT9M001_WINDOW_HEIGHT,
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rect->height + icd->y_skip_top - 1);
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if (ret >= 0 && mt9m001->autoexposure) {
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ret = reg_write(icd, MT9M001_SHUTTER_WIDTH,
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rect->height + icd->y_skip_top + vblank);
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if (ret >= 0) {
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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 = (524 + (rect->height + icd->y_skip_top +
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vblank - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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1048 + qctrl->minimum;
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}
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}
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return ret < 0 ? ret : 0;
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}
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static int mt9m001_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 > 1024 + icd->y_skip_top)
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f->fmt.pix.height = 1024 + 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 > 1280)
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f->fmt.pix.width = 1280;
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f->fmt.pix.width &= ~0x01; /* has to be even, unsure why was ~3 */
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return 0;
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}
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static int mt9m001_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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, 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 != mt9m001->client->addr)
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return -ENODEV;
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id->ident = mt9m001->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 mt9m001_get_register(struct soc_camera_device *icd,
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struct v4l2_register *reg)
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{
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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, 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 != mt9m001->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 mt9m001_set_register(struct soc_camera_device *icd,
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struct v4l2_register *reg)
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{
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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, 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 != mt9m001->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 unsigned int mt9m001_get_datawidth(struct soc_camera_device *icd)
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{
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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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return mt9m001->datawidth;
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}
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const struct v4l2_queryctrl mt9m001_controls[] = {
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{
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.id = V4L2_CID_VFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Vertically",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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}, {
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gain",
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.minimum = 0,
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.maximum = 127,
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.step = 1,
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.default_value = 64,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Exposure",
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.minimum = 1,
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.maximum = 255,
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.step = 1,
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.default_value = 255,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE_AUTO,
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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 mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
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static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl);
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static struct soc_camera_ops mt9m001_ops = {
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.owner = THIS_MODULE,
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.init = mt9m001_init,
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.release = mt9m001_release,
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.start_capture = mt9m001_start_capture,
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.stop_capture = mt9m001_stop_capture,
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.set_capture_format = mt9m001_set_capture_format,
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.try_fmt_cap = mt9m001_try_fmt_cap,
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.formats = NULL, /* Filled in later depending on the */
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.num_formats = 0, /* camera type and data widths */
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.get_datawidth = mt9m001_get_datawidth,
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.controls = mt9m001_controls,
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.num_controls = ARRAY_SIZE(mt9m001_controls),
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.get_control = mt9m001_get_control,
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.set_control = mt9m001_set_control,
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.get_chip_id = mt9m001_get_chip_id,
|
||||
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
||||
.get_register = mt9m001_get_register,
|
||||
.set_register = mt9m001_set_register,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
|
||||
int data;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
data = reg_read(icd, MT9M001_READ_OPTIONS2);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
ctrl->value = !!(data & 0x8000);
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
ctrl->value = mt9m001->autoexposure;
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
|
||||
{
|
||||
struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
|
||||
const struct v4l2_queryctrl *qctrl;
|
||||
int data;
|
||||
|
||||
qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
|
||||
|
||||
if (!qctrl)
|
||||
return -EINVAL;
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_VFLIP:
|
||||
if (ctrl->value)
|
||||
data = reg_set(icd, MT9M001_READ_OPTIONS2, 0x8000);
|
||||
else
|
||||
data = reg_clear(icd, MT9M001_READ_OPTIONS2, 0x8000);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
break;
|
||||
case V4L2_CID_GAIN:
|
||||
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
|
||||
return -EINVAL;
|
||||
/* See Datasheet Table 7, Gain settings. */
|
||||
if (ctrl->value <= qctrl->default_value) {
|
||||
/* Pack it into 0..1 step 0.125, register values 0..8 */
|
||||
unsigned long range = qctrl->default_value - qctrl->minimum;
|
||||
data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
|
||||
|
||||
dev_dbg(&icd->dev, "Setting gain %d\n", data);
|
||||
data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
} else {
|
||||
/* Pack it into 1.125..15 variable step, register values 9..67 */
|
||||
/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
|
||||
unsigned long range = qctrl->maximum - qctrl->default_value - 1;
|
||||
unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
|
||||
111 + range / 2) / range + 9;
|
||||
|
||||
if (gain <= 32)
|
||||
data = gain;
|
||||
else if (gain <= 64)
|
||||
data = ((gain - 32) * 16 + 16) / 32 + 80;
|
||||
else
|
||||
data = ((gain - 64) * 7 + 28) / 56 + 96;
|
||||
|
||||
dev_dbg(&icd->dev, "Setting gain from %d to %d\n",
|
||||
reg_read(icd, MT9M001_GLOBAL_GAIN), data);
|
||||
data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
|
||||
if (data < 0)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Success */
|
||||
icd->gain = ctrl->value;
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE:
|
||||
/* mt9m001 has maximum == default */
|
||||
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
|
||||
return -EINVAL;
|
||||
else {
|
||||
unsigned long range = qctrl->maximum - qctrl->minimum;
|
||||
unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
|
||||
range / 2) / range + 1;
|
||||
|
||||
dev_dbg(&icd->dev, "Setting shutter width from %d to %lu\n",
|
||||
reg_read(icd, MT9M001_SHUTTER_WIDTH), shutter);
|
||||
if (reg_write(icd, MT9M001_SHUTTER_WIDTH, shutter) < 0)
|
||||
return -EIO;
|
||||
icd->exposure = ctrl->value;
|
||||
mt9m001->autoexposure = 0;
|
||||
}
|
||||
break;
|
||||
case V4L2_CID_EXPOSURE_AUTO:
|
||||
if (ctrl->value) {
|
||||
const u16 vblank = 25;
|
||||
if (reg_write(icd, MT9M001_SHUTTER_WIDTH, icd->height +
|
||||
icd->y_skip_top + vblank) < 0)
|
||||
return -EIO;
|
||||
qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
|
||||
icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) *
|
||||
(qctrl->maximum - qctrl->minimum)) /
|
||||
1048 + qctrl->minimum;
|
||||
mt9m001->autoexposure = 1;
|
||||
} else
|
||||
mt9m001->autoexposure = 0;
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Interface active, can use i2c. If it fails, it can indeed mean, that
|
||||
* this wasn't our capture interface, so, we wait for the right one */
|
||||
static int mt9m001_video_probe(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
|
||||
s32 data;
|
||||
int ret;
|
||||
|
||||
/* We must have a parent by now. And it cannot be a wrong one.
|
||||
* So this entire test is completely redundant. */
|
||||
if (!icd->dev.parent ||
|
||||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
|
||||
return -ENODEV;
|
||||
|
||||
/* Enable the chip */
|
||||
data = reg_write(&mt9m001->icd, MT9M001_CHIP_ENABLE, 1);
|
||||
dev_dbg(&icd->dev, "write: %d\n", data);
|
||||
|
||||
/* Read out the chip version register */
|
||||
data = reg_read(icd, MT9M001_CHIP_VERSION);
|
||||
|
||||
/* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
|
||||
switch (data) {
|
||||
case 0x8411:
|
||||
case 0x8421:
|
||||
mt9m001->model = V4L2_IDENT_MT9M001C12ST;
|
||||
mt9m001_ops.formats = mt9m001_colour_formats;
|
||||
mt9m001_ops.num_formats = ARRAY_SIZE(mt9m001_colour_formats);
|
||||
break;
|
||||
case 0x8431:
|
||||
mt9m001->model = V4L2_IDENT_MT9M001C12STM;
|
||||
mt9m001_ops.formats = mt9m001_monochrome_formats;
|
||||
if (mt9m001->client->dev.platform_data)
|
||||
mt9m001_ops.num_formats = ARRAY_SIZE(mt9m001_monochrome_formats);
|
||||
else
|
||||
mt9m001_ops.num_formats = 1;
|
||||
break;
|
||||
default:
|
||||
ret = -ENODEV;
|
||||
dev_err(&icd->dev,
|
||||
"No MT9M001 chip detected, register read %x\n", data);
|
||||
goto ei2c;
|
||||
}
|
||||
|
||||
dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
|
||||
data == 0x8431 ? "C12STM" : "C12ST");
|
||||
|
||||
/* Now that we know the model, we can start video */
|
||||
ret = soc_camera_video_start(icd);
|
||||
if (ret)
|
||||
goto eisis;
|
||||
|
||||
return 0;
|
||||
|
||||
eisis:
|
||||
ei2c:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mt9m001_video_remove(struct soc_camera_device *icd)
|
||||
{
|
||||
struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
|
||||
|
||||
dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m001->client->addr,
|
||||
mt9m001->icd.dev.parent, mt9m001->icd.vdev);
|
||||
soc_camera_video_stop(&mt9m001->icd);
|
||||
}
|
||||
|
||||
static int mt9m001_probe(struct i2c_client *client)
|
||||
{
|
||||
struct mt9m001 *mt9m001;
|
||||
struct 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, "MT9M001 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;
|
||||
}
|
||||
|
||||
mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
|
||||
if (!mt9m001)
|
||||
return -ENOMEM;
|
||||
|
||||
mt9m001->client = client;
|
||||
i2c_set_clientdata(client, mt9m001);
|
||||
|
||||
/* Second stage probe - when a capture adapter is there */
|
||||
icd = &mt9m001->icd;
|
||||
icd->probe = mt9m001_video_probe;
|
||||
icd->remove = mt9m001_video_remove;
|
||||
icd->ops = &mt9m001_ops;
|
||||
icd->control = &client->dev;
|
||||
icd->x_min = 20;
|
||||
icd->y_min = 12;
|
||||
icd->x_current = 20;
|
||||
icd->y_current = 12;
|
||||
icd->width_min = 48;
|
||||
icd->width_max = 1280;
|
||||
icd->height_min = 32;
|
||||
icd->height_max = 1024;
|
||||
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. */
|
||||
mt9m001->datawidth = 10;
|
||||
/* Simulated autoexposure. If enabled, we calculate shutter width
|
||||
* ourselves in the driver based on vertical blanking and frame width */
|
||||
mt9m001->autoexposure = 1;
|
||||
|
||||
ret = bus_switch_request(mt9m001, icl);
|
||||
if (ret)
|
||||
goto eswinit;
|
||||
|
||||
ret = soc_camera_device_register(icd);
|
||||
if (ret)
|
||||
goto eisdr;
|
||||
|
||||
return 0;
|
||||
|
||||
eisdr:
|
||||
bus_switch_release(mt9m001);
|
||||
eswinit:
|
||||
kfree(mt9m001);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mt9m001_remove(struct i2c_client *client)
|
||||
{
|
||||
struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
|
||||
|
||||
soc_camera_device_unregister(&mt9m001->icd);
|
||||
bus_switch_release(mt9m001);
|
||||
kfree(mt9m001);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct i2c_driver mt9m001_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "mt9m001",
|
||||
},
|
||||
.probe = mt9m001_probe,
|
||||
.remove = mt9m001_remove,
|
||||
};
|
||||
|
||||
static int __init mt9m001_mod_init(void)
|
||||
{
|
||||
return i2c_add_driver(&mt9m001_i2c_driver);
|
||||
}
|
||||
|
||||
static void __exit mt9m001_mod_exit(void)
|
||||
{
|
||||
i2c_del_driver(&mt9m001_i2c_driver);
|
||||
}
|
||||
|
||||
module_init(mt9m001_mod_init);
|
||||
module_exit(mt9m001_mod_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
|
||||
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user