forked from Minki/linux
3f8770454b
Function ensures that error codes don't get mangled. Dependant on: which is working it's way through the i2c tree. Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
748 lines
20 KiB
C
748 lines
20 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 <media/soc_camera.h>
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#include <media/soc_mediabus.h>
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#include <media/v4l2-subdev.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-ctrls.h>
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/*
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* mt9m001 i2c address 0x5d
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* The platform has to define ctruct i2c_board_info objects and link to them
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* from struct soc_camera_link
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*/
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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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#define MT9M001_MAX_WIDTH 1280
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#define MT9M001_MAX_HEIGHT 1024
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#define MT9M001_MIN_WIDTH 48
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#define MT9M001_MIN_HEIGHT 32
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#define MT9M001_COLUMN_SKIP 20
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#define MT9M001_ROW_SKIP 12
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/* MT9M001 has only one fixed colorspace per pixelcode */
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struct mt9m001_datafmt {
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enum v4l2_mbus_pixelcode code;
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enum v4l2_colorspace colorspace;
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};
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/* Find a data format by a pixel code in an array */
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static const struct mt9m001_datafmt *mt9m001_find_datafmt(
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enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt,
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int n)
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{
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int i;
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for (i = 0; i < n; i++)
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if (fmt[i].code == code)
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return fmt + i;
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return NULL;
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}
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static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
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/*
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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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{V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
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{V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
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};
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static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
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/* Order important - see above */
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{V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
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{V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
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};
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struct mt9m001 {
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struct v4l2_subdev subdev;
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struct v4l2_ctrl_handler hdl;
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struct {
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/* exposure/auto-exposure cluster */
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struct v4l2_ctrl *autoexposure;
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struct v4l2_ctrl *exposure;
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};
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struct v4l2_rect rect; /* Sensor window */
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const struct mt9m001_datafmt *fmt;
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const struct mt9m001_datafmt *fmts;
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int num_fmts;
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int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
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unsigned int total_h;
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unsigned short y_skip_top; /* Lines to skip at the top */
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};
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static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
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{
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return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
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}
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static int reg_read(struct i2c_client *client, const u8 reg)
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{
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return i2c_smbus_read_word_swapped(client, reg);
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}
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static int reg_write(struct i2c_client *client, const u8 reg,
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const u16 data)
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{
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return i2c_smbus_write_word_swapped(client, reg, data);
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}
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static int reg_set(struct i2c_client *client, const u8 reg,
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const u16 data)
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{
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int ret;
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ret = reg_read(client, reg);
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if (ret < 0)
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return ret;
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return reg_write(client, reg, ret | data);
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}
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static int reg_clear(struct i2c_client *client, const u8 reg,
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const u16 data)
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{
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int ret;
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ret = reg_read(client, reg);
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if (ret < 0)
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return ret;
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return reg_write(client, reg, ret & ~data);
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}
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static int mt9m001_init(struct i2c_client *client)
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{
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int ret;
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dev_dbg(&client->dev, "%s\n", __func__);
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/*
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* We don't know, whether platform provides reset, issue a soft reset
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* too. This returns all registers to their default values.
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*/
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ret = reg_write(client, MT9M001_RESET, 1);
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if (!ret)
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ret = reg_write(client, MT9M001_RESET, 0);
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/* Disable chip, synchronous option update */
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if (!ret)
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ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
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return ret;
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}
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static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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/* Switch to master "normal" mode or stop sensor readout */
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if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0)
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return -EIO;
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return 0;
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}
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static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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struct v4l2_rect rect = a->c;
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int ret;
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const u16 hblank = 9, vblank = 25;
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if (mt9m001->fmts == mt9m001_colour_fmts)
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/*
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* Bayer format - even number of rows for simplicity,
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* but let the user play with the top row.
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*/
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rect.height = ALIGN(rect.height, 2);
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/* Datasheet requirement: see register description */
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rect.width = ALIGN(rect.width, 2);
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rect.left = ALIGN(rect.left, 2);
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soc_camera_limit_side(&rect.left, &rect.width,
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MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH);
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soc_camera_limit_side(&rect.top, &rect.height,
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MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
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mt9m001->total_h = rect.height + mt9m001->y_skip_top + vblank;
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/* Blanking and start values - default... */
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ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
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if (!ret)
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ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank);
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/*
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* The caller provides a supported format, as verified per
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* call to .try_mbus_fmt()
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*/
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if (!ret)
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ret = reg_write(client, MT9M001_COLUMN_START, rect.left);
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if (!ret)
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ret = reg_write(client, MT9M001_ROW_START, rect.top);
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if (!ret)
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ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1);
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if (!ret)
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ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
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rect.height + mt9m001->y_skip_top - 1);
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if (!ret && v4l2_ctrl_g_ctrl(mt9m001->autoexposure) == V4L2_EXPOSURE_AUTO)
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ret = reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h);
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if (!ret)
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mt9m001->rect = rect;
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return ret;
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}
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static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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a->c = mt9m001->rect;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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return 0;
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}
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static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
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{
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a->bounds.left = MT9M001_COLUMN_SKIP;
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a->bounds.top = MT9M001_ROW_SKIP;
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a->bounds.width = MT9M001_MAX_WIDTH;
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a->bounds.height = MT9M001_MAX_HEIGHT;
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a->defrect = a->bounds;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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a->pixelaspect.numerator = 1;
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a->pixelaspect.denominator = 1;
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return 0;
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}
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static int mt9m001_g_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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mf->width = mt9m001->rect.width;
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mf->height = mt9m001->rect.height;
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mf->code = mt9m001->fmt->code;
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mf->colorspace = mt9m001->fmt->colorspace;
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mf->field = V4L2_FIELD_NONE;
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return 0;
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}
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static int mt9m001_s_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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struct v4l2_crop a = {
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.c = {
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.left = mt9m001->rect.left,
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.top = mt9m001->rect.top,
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.width = mf->width,
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.height = mf->height,
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},
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};
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int ret;
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/* No support for scaling so far, just crop. TODO: use skipping */
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ret = mt9m001_s_crop(sd, &a);
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if (!ret) {
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mf->width = mt9m001->rect.width;
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mf->height = mt9m001->rect.height;
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mt9m001->fmt = mt9m001_find_datafmt(mf->code,
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mt9m001->fmts, mt9m001->num_fmts);
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mf->colorspace = mt9m001->fmt->colorspace;
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}
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return ret;
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}
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static int mt9m001_try_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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const struct mt9m001_datafmt *fmt;
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v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
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MT9M001_MAX_WIDTH, 1,
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&mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
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MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
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if (mt9m001->fmts == mt9m001_colour_fmts)
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mf->height = ALIGN(mf->height - 1, 2);
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fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
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mt9m001->num_fmts);
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if (!fmt) {
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fmt = mt9m001->fmt;
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mf->code = fmt->code;
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}
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mf->colorspace = fmt->colorspace;
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return 0;
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}
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static int mt9m001_g_chip_ident(struct v4l2_subdev *sd,
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struct v4l2_dbg_chip_ident *id)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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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 != 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_g_register(struct v4l2_subdev *sd,
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struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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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 != client->addr)
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return -ENODEV;
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reg->size = 2;
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reg->val = reg_read(client, 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_s_register(struct v4l2_subdev *sd,
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struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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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 != client->addr)
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return -ENODEV;
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if (reg_write(client, 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 int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct mt9m001 *mt9m001 = container_of(ctrl->handler,
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struct mt9m001, hdl);
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s32 min, max;
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switch (ctrl->id) {
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case V4L2_CID_EXPOSURE_AUTO:
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min = mt9m001->exposure->minimum;
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max = mt9m001->exposure->maximum;
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mt9m001->exposure->val =
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(524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
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break;
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}
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return 0;
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}
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static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct mt9m001 *mt9m001 = container_of(ctrl->handler,
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struct mt9m001, hdl);
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struct v4l2_subdev *sd = &mt9m001->subdev;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct v4l2_ctrl *exp = mt9m001->exposure;
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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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if (ctrl->val)
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data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
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else
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data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
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if (data < 0)
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return -EIO;
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return 0;
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case V4L2_CID_GAIN:
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/* See Datasheet Table 7, Gain settings. */
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if (ctrl->val <= ctrl->default_value) {
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/* Pack it into 0..1 step 0.125, register values 0..8 */
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unsigned long range = ctrl->default_value - ctrl->minimum;
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data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range;
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dev_dbg(&client->dev, "Setting gain %d\n", data);
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data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
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if (data < 0)
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return -EIO;
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} else {
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/* Pack it into 1.125..15 variable step, register values 9..67 */
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/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
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unsigned long range = ctrl->maximum - ctrl->default_value - 1;
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unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
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111 + range / 2) / range + 9;
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if (gain <= 32)
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data = gain;
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else if (gain <= 64)
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data = ((gain - 32) * 16 + 16) / 32 + 80;
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else
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data = ((gain - 64) * 7 + 28) / 56 + 96;
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dev_dbg(&client->dev, "Setting gain from %d to %d\n",
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reg_read(client, MT9M001_GLOBAL_GAIN), data);
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data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
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if (data < 0)
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return -EIO;
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}
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return 0;
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case V4L2_CID_EXPOSURE_AUTO:
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if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
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unsigned long range = exp->maximum - exp->minimum;
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unsigned long shutter = ((exp->val - exp->minimum) * 1048 +
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range / 2) / range + 1;
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dev_dbg(&client->dev,
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"Setting shutter width from %d to %lu\n",
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reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
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if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
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return -EIO;
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} else {
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const u16 vblank = 25;
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mt9m001->total_h = mt9m001->rect.height +
|
|
mt9m001->y_skip_top + vblank;
|
|
if (reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h) < 0)
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* 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_link *icl,
|
|
struct i2c_client *client)
|
|
{
|
|
struct mt9m001 *mt9m001 = to_mt9m001(client);
|
|
s32 data;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
/* Enable the chip */
|
|
data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
|
|
dev_dbg(&client->dev, "write: %d\n", data);
|
|
|
|
/* Read out the chip version register */
|
|
data = reg_read(client, 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->fmts = mt9m001_colour_fmts;
|
|
break;
|
|
case 0x8431:
|
|
mt9m001->model = V4L2_IDENT_MT9M001C12STM;
|
|
mt9m001->fmts = mt9m001_monochrome_fmts;
|
|
break;
|
|
default:
|
|
dev_err(&client->dev,
|
|
"No MT9M001 chip detected, register read %x\n", data);
|
|
return -ENODEV;
|
|
}
|
|
|
|
mt9m001->num_fmts = 0;
|
|
|
|
/*
|
|
* This is a 10bit sensor, so by default we only allow 10bit.
|
|
* The platform may support different bus widths due to
|
|
* different routing of the data lines.
|
|
*/
|
|
if (icl->query_bus_param)
|
|
flags = icl->query_bus_param(icl);
|
|
else
|
|
flags = SOCAM_DATAWIDTH_10;
|
|
|
|
if (flags & SOCAM_DATAWIDTH_10)
|
|
mt9m001->num_fmts++;
|
|
else
|
|
mt9m001->fmts++;
|
|
|
|
if (flags & SOCAM_DATAWIDTH_8)
|
|
mt9m001->num_fmts++;
|
|
|
|
mt9m001->fmt = &mt9m001->fmts[0];
|
|
|
|
dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
|
|
data == 0x8431 ? "C12STM" : "C12ST");
|
|
|
|
ret = mt9m001_init(client);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "Failed to initialise the camera\n");
|
|
|
|
/* mt9m001_init() has reset the chip, returning registers to defaults */
|
|
return v4l2_ctrl_handler_setup(&mt9m001->hdl);
|
|
}
|
|
|
|
static void mt9m001_video_remove(struct soc_camera_link *icl)
|
|
{
|
|
if (icl->free_bus)
|
|
icl->free_bus(icl);
|
|
}
|
|
|
|
static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9m001 *mt9m001 = to_mt9m001(client);
|
|
|
|
*lines = mt9m001->y_skip_top;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
|
|
.g_volatile_ctrl = mt9m001_g_volatile_ctrl,
|
|
.s_ctrl = mt9m001_s_ctrl,
|
|
};
|
|
|
|
static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
|
|
.g_chip_ident = mt9m001_g_chip_ident,
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.g_register = mt9m001_g_register,
|
|
.s_register = mt9m001_s_register,
|
|
#endif
|
|
};
|
|
|
|
static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
|
|
enum v4l2_mbus_pixelcode *code)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9m001 *mt9m001 = to_mt9m001(client);
|
|
|
|
if (index >= mt9m001->num_fmts)
|
|
return -EINVAL;
|
|
|
|
*code = mt9m001->fmts[index].code;
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m001_g_mbus_config(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_config *cfg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
|
|
|
|
/* MT9M001 has all capture_format parameters fixed */
|
|
cfg->flags = V4L2_MBUS_PCLK_SAMPLE_FALLING |
|
|
V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
|
|
V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_MASTER;
|
|
cfg->type = V4L2_MBUS_PARALLEL;
|
|
cfg->flags = soc_camera_apply_board_flags(icl, cfg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m001_s_mbus_config(struct v4l2_subdev *sd,
|
|
const struct v4l2_mbus_config *cfg)
|
|
{
|
|
const struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
|
|
struct mt9m001 *mt9m001 = to_mt9m001(client);
|
|
unsigned int bps = soc_mbus_get_fmtdesc(mt9m001->fmt->code)->bits_per_sample;
|
|
|
|
if (icl->set_bus_param)
|
|
return icl->set_bus_param(icl, 1 << (bps - 1));
|
|
|
|
/*
|
|
* Without board specific bus width settings we only support the
|
|
* sensors native bus width
|
|
*/
|
|
return bps == 10 ? 0 : -EINVAL;
|
|
}
|
|
|
|
static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
|
|
.s_stream = mt9m001_s_stream,
|
|
.s_mbus_fmt = mt9m001_s_fmt,
|
|
.g_mbus_fmt = mt9m001_g_fmt,
|
|
.try_mbus_fmt = mt9m001_try_fmt,
|
|
.s_crop = mt9m001_s_crop,
|
|
.g_crop = mt9m001_g_crop,
|
|
.cropcap = mt9m001_cropcap,
|
|
.enum_mbus_fmt = mt9m001_enum_fmt,
|
|
.g_mbus_config = mt9m001_g_mbus_config,
|
|
.s_mbus_config = mt9m001_s_mbus_config,
|
|
};
|
|
|
|
static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
|
|
.g_skip_top_lines = mt9m001_g_skip_top_lines,
|
|
};
|
|
|
|
static struct v4l2_subdev_ops mt9m001_subdev_ops = {
|
|
.core = &mt9m001_subdev_core_ops,
|
|
.video = &mt9m001_subdev_video_ops,
|
|
.sensor = &mt9m001_subdev_sensor_ops,
|
|
};
|
|
|
|
static int mt9m001_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *did)
|
|
{
|
|
struct mt9m001 *mt9m001;
|
|
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
|
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
|
|
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;
|
|
|
|
v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
|
|
v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
|
|
v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
|
|
V4L2_CID_VFLIP, 0, 1, 1, 0);
|
|
v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
|
|
V4L2_CID_GAIN, 0, 127, 1, 64);
|
|
mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
|
|
V4L2_CID_EXPOSURE, 1, 255, 1, 255);
|
|
/*
|
|
* Simulated autoexposure. If enabled, we calculate shutter width
|
|
* ourselves in the driver based on vertical blanking and frame width
|
|
*/
|
|
mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl,
|
|
&mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
|
|
V4L2_EXPOSURE_AUTO);
|
|
mt9m001->subdev.ctrl_handler = &mt9m001->hdl;
|
|
if (mt9m001->hdl.error) {
|
|
int err = mt9m001->hdl.error;
|
|
|
|
kfree(mt9m001);
|
|
return err;
|
|
}
|
|
v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure,
|
|
V4L2_EXPOSURE_MANUAL, true);
|
|
|
|
/* Second stage probe - when a capture adapter is there */
|
|
mt9m001->y_skip_top = 0;
|
|
mt9m001->rect.left = MT9M001_COLUMN_SKIP;
|
|
mt9m001->rect.top = MT9M001_ROW_SKIP;
|
|
mt9m001->rect.width = MT9M001_MAX_WIDTH;
|
|
mt9m001->rect.height = MT9M001_MAX_HEIGHT;
|
|
|
|
ret = mt9m001_video_probe(icl, client);
|
|
if (ret) {
|
|
v4l2_ctrl_handler_free(&mt9m001->hdl);
|
|
kfree(mt9m001);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9m001_remove(struct i2c_client *client)
|
|
{
|
|
struct mt9m001 *mt9m001 = to_mt9m001(client);
|
|
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
|
|
|
|
v4l2_device_unregister_subdev(&mt9m001->subdev);
|
|
v4l2_ctrl_handler_free(&mt9m001->hdl);
|
|
mt9m001_video_remove(icl);
|
|
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");
|