![Hans Verkuil](/assets/img/avatar_default.png)
Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
758 lines
19 KiB
C
758 lines
19 KiB
C
/*
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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 <linux/gpio.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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/* 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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/* Order important: first natively supported,
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* second supported with a GPIO extender */
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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_SBGGR16,
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.colorspace = V4L2_COLORSPACE_SRGB,
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}, {
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.name = "Bayer (sRGB) 8 bit",
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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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};
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static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
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/* Order important - see above */
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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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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
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int ret;
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dev_dbg(icd->vdev->parent, "%s\n", __func__);
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if (icl->power) {
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ret = icl->power(&mt9m001->client->dev, 1);
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if (ret < 0) {
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dev_err(icd->vdev->parent,
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"Platform failed to power-on the camera.\n");
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return ret;
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}
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}
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/* The camera could have been already on, we reset it additionally */
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if (icl->reset)
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ret = icl->reset(&mt9m001->client->dev);
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else
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ret = -ENODEV;
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if (ret < 0) {
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/* Either no platform reset, or platform reset failed */
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ret = reg_write(icd, MT9M001_RESET, 1);
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if (!ret)
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ret = reg_write(icd, MT9M001_RESET, 0);
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}
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/* Disable chip, synchronous option update */
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if (!ret)
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ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
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return ret;
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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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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
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/* Disable the chip */
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reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
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if (icl->power)
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icl->power(&mt9m001->client->dev, 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_is_valid(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 = -EINVAL;
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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 (gpio_is_valid(mt9m001->switch_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 (!gpio_is_valid(mt9m001->switch_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 bus_switch_possible(struct mt9m001 *mt9m001)
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{
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#ifdef CONFIG_MT9M001_PCA9536_SWITCH
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return gpio_is_valid(mt9m001->switch_gpio);
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#else
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return 0;
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#endif
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}
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static int mt9m001_set_bus_param(struct soc_camera_device *icd,
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unsigned long 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 & SOCAM_DATAWIDTH_MASK;
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int ret;
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/* Flags validity verified in test_bus_param */
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if ((mt9m001->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
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(mt9m001->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
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(mt9m001->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
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/* Well, we actually only can do 10 or 8 bits... */
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if (width_flag == SOCAM_DATAWIDTH_9)
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return -EINVAL;
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ret = bus_switch_act(mt9m001,
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width_flag == SOCAM_DATAWIDTH_8);
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if (ret < 0)
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return ret;
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mt9m001->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
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}
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return 0;
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}
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static unsigned long mt9m001_query_bus_param(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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struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
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/* MT9M001 has all capture_format parameters fixed */
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unsigned long flags = SOCAM_DATAWIDTH_10 | SOCAM_PCLK_SAMPLE_RISING |
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SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
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SOCAM_MASTER;
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if (bus_switch_possible(mt9m001))
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flags |= SOCAM_DATAWIDTH_8;
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return soc_camera_apply_sensor_flags(icl, flags);
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}
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static int mt9m001_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 mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
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int ret;
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const u16 hblank = 9, vblank = 25;
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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)
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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() */
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if (!ret)
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ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
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if (!ret)
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ret = reg_write(icd, MT9M001_ROW_START, rect->top);
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if (!ret)
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ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
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if (!ret)
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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 && 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) {
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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;
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}
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static int mt9m001_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 < 32 + icd->y_skip_top)
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pix->height = 32 + icd->y_skip_top;
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if (pix->height > 1024 + icd->y_skip_top)
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pix->height = 1024 + icd->y_skip_top;
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if (pix->width < 48)
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pix->width = 48;
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if (pix->width > 1280)
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pix->width = 1280;
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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_dbg_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.addr != 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_dbg_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.addr != mt9m001->client->addr)
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return -ENODEV;
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reg->size = 2;
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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_dbg_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.addr != 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 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_video_probe(struct soc_camera_device *);
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static void mt9m001_video_remove(struct soc_camera_device *);
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static int mt9m001_get_control(struct soc_camera_device *, struct v4l2_control *);
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static int mt9m001_set_control(struct soc_camera_device *, struct v4l2_control *);
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static struct soc_camera_ops mt9m001_ops = {
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.owner = THIS_MODULE,
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.probe = mt9m001_video_probe,
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.remove = mt9m001_video_remove,
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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_fmt = mt9m001_set_fmt,
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.try_fmt = mt9m001_try_fmt,
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.set_bus_param = mt9m001_set_bus_param,
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.query_bus_param = mt9m001_query_bus_param,
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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,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.get_register = mt9m001_get_register,
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.set_register = mt9m001_set_register,
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#endif
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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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{
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struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, 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, 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);
|
|
struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
|
|
s32 data;
|
|
int ret;
|
|
|
|
/* We must have a parent by now. And it cannot be a wrong one.
|
|
* So this entire test is completely redundant. */
|
|
if (!icd->dev.parent ||
|
|
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
|
|
return -ENODEV;
|
|
|
|
/* Enable the chip */
|
|
data = reg_write(icd, 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;
|
|
icd->formats = mt9m001_colour_formats;
|
|
if (gpio_is_valid(icl->gpio))
|
|
icd->num_formats = ARRAY_SIZE(mt9m001_colour_formats);
|
|
else
|
|
icd->num_formats = 1;
|
|
break;
|
|
case 0x8431:
|
|
mt9m001->model = V4L2_IDENT_MT9M001C12STM;
|
|
icd->formats = mt9m001_monochrome_formats;
|
|
if (gpio_is_valid(icl->gpio))
|
|
icd->num_formats = ARRAY_SIZE(mt9m001_monochrome_formats);
|
|
else
|
|
icd->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,
|
|
icd->dev.parent, icd->vdev);
|
|
soc_camera_video_stop(icd);
|
|
}
|
|
|
|
static int mt9m001_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *did)
|
|
{
|
|
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->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 const struct i2c_device_id mt9m001_id[] = {
|
|
{ "mt9m001", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, mt9m001_id);
|
|
|
|
static struct i2c_driver mt9m001_i2c_driver = {
|
|
.driver = {
|
|
.name = "mt9m001",
|
|
},
|
|
.probe = mt9m001_probe,
|
|
.remove = mt9m001_remove,
|
|
.id_table = mt9m001_id,
|
|
};
|
|
|
|
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");
|