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889 lines
24 KiB
889 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Driver for MT9M032 CMOS Image Sensor from Micron |
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* |
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* Copyright (C) 2010-2011 Lund Engineering |
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* Contact: Gil Lund <[email protected]> |
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* Author: Martin Hostettler <[email protected]> |
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*/ |
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#include <linux/delay.h> |
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#include <linux/i2c.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/math64.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/slab.h> |
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#include <linux/v4l2-mediabus.h> |
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#include <media/media-entity.h> |
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#include <media/i2c/mt9m032.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-subdev.h> |
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#include "aptina-pll.h" |
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/* |
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* width and height include active boundary and black parts |
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* |
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* column 0- 15 active boundary |
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* column 16-1455 image |
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* column 1456-1471 active boundary |
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* column 1472-1599 black |
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* |
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* row 0- 51 black |
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* row 53- 59 active boundary |
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* row 60-1139 image |
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* row 1140-1147 active boundary |
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* row 1148-1151 black |
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*/ |
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#define MT9M032_PIXEL_ARRAY_WIDTH 1600 |
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#define MT9M032_PIXEL_ARRAY_HEIGHT 1152 |
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#define MT9M032_CHIP_VERSION 0x00 |
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#define MT9M032_CHIP_VERSION_VALUE 0x1402 |
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#define MT9M032_ROW_START 0x01 |
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#define MT9M032_ROW_START_MIN 0 |
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#define MT9M032_ROW_START_MAX 1152 |
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#define MT9M032_ROW_START_DEF 60 |
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#define MT9M032_COLUMN_START 0x02 |
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#define MT9M032_COLUMN_START_MIN 0 |
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#define MT9M032_COLUMN_START_MAX 1600 |
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#define MT9M032_COLUMN_START_DEF 16 |
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#define MT9M032_ROW_SIZE 0x03 |
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#define MT9M032_ROW_SIZE_MIN 32 |
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#define MT9M032_ROW_SIZE_MAX 1152 |
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#define MT9M032_ROW_SIZE_DEF 1080 |
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#define MT9M032_COLUMN_SIZE 0x04 |
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#define MT9M032_COLUMN_SIZE_MIN 32 |
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#define MT9M032_COLUMN_SIZE_MAX 1600 |
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#define MT9M032_COLUMN_SIZE_DEF 1440 |
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#define MT9M032_HBLANK 0x05 |
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#define MT9M032_VBLANK 0x06 |
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#define MT9M032_VBLANK_MAX 0x7ff |
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#define MT9M032_SHUTTER_WIDTH_HIGH 0x08 |
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#define MT9M032_SHUTTER_WIDTH_LOW 0x09 |
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#define MT9M032_SHUTTER_WIDTH_MIN 1 |
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#define MT9M032_SHUTTER_WIDTH_MAX 1048575 |
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#define MT9M032_SHUTTER_WIDTH_DEF 1943 |
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#define MT9M032_PIX_CLK_CTRL 0x0a |
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#define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000 |
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#define MT9M032_RESTART 0x0b |
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#define MT9M032_RESET 0x0d |
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#define MT9M032_PLL_CONFIG1 0x11 |
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#define MT9M032_PLL_CONFIG1_PREDIV_MASK 0x3f |
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#define MT9M032_PLL_CONFIG1_MUL_SHIFT 8 |
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#define MT9M032_READ_MODE1 0x1e |
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#define MT9M032_READ_MODE1_OUTPUT_BAD_FRAMES (1 << 13) |
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#define MT9M032_READ_MODE1_MAINTAIN_FRAME_RATE (1 << 12) |
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#define MT9M032_READ_MODE1_XOR_LINE_VALID (1 << 11) |
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#define MT9M032_READ_MODE1_CONT_LINE_VALID (1 << 10) |
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#define MT9M032_READ_MODE1_INVERT_TRIGGER (1 << 9) |
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#define MT9M032_READ_MODE1_SNAPSHOT (1 << 8) |
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#define MT9M032_READ_MODE1_GLOBAL_RESET (1 << 7) |
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#define MT9M032_READ_MODE1_BULB_EXPOSURE (1 << 6) |
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#define MT9M032_READ_MODE1_INVERT_STROBE (1 << 5) |
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#define MT9M032_READ_MODE1_STROBE_ENABLE (1 << 4) |
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#define MT9M032_READ_MODE1_STROBE_START_TRIG1 (0 << 2) |
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#define MT9M032_READ_MODE1_STROBE_START_EXP (1 << 2) |
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#define MT9M032_READ_MODE1_STROBE_START_SHUTTER (2 << 2) |
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#define MT9M032_READ_MODE1_STROBE_START_TRIG2 (3 << 2) |
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#define MT9M032_READ_MODE1_STROBE_END_TRIG1 (0 << 0) |
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#define MT9M032_READ_MODE1_STROBE_END_EXP (1 << 0) |
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#define MT9M032_READ_MODE1_STROBE_END_SHUTTER (2 << 0) |
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#define MT9M032_READ_MODE1_STROBE_END_TRIG2 (3 << 0) |
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#define MT9M032_READ_MODE2 0x20 |
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#define MT9M032_READ_MODE2_VFLIP_SHIFT 15 |
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#define MT9M032_READ_MODE2_HFLIP_SHIFT 14 |
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#define MT9M032_READ_MODE2_ROW_BLC 0x40 |
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#define MT9M032_GAIN_GREEN1 0x2b |
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#define MT9M032_GAIN_BLUE 0x2c |
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#define MT9M032_GAIN_RED 0x2d |
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#define MT9M032_GAIN_GREEN2 0x2e |
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|
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/* write only */ |
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#define MT9M032_GAIN_ALL 0x35 |
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#define MT9M032_GAIN_DIGITAL_MASK 0x7f |
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#define MT9M032_GAIN_DIGITAL_SHIFT 8 |
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#define MT9M032_GAIN_AMUL_SHIFT 6 |
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#define MT9M032_GAIN_ANALOG_MASK 0x3f |
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#define MT9M032_FORMATTER1 0x9e |
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#define MT9M032_FORMATTER1_PLL_P1_6 (1 << 8) |
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#define MT9M032_FORMATTER1_PARALLEL (1 << 12) |
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#define MT9M032_FORMATTER2 0x9f |
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#define MT9M032_FORMATTER2_DOUT_EN 0x1000 |
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#define MT9M032_FORMATTER2_PIXCLK_EN 0x2000 |
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/* |
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* The available MT9M032 datasheet is missing documentation for register 0x10 |
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* MT9P031 seems to be close enough, so use constants from that datasheet for |
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* now. |
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* But keep the name MT9P031 to remind us, that this isn't really confirmed |
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* for this sensor. |
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*/ |
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#define MT9P031_PLL_CONTROL 0x10 |
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#define MT9P031_PLL_CONTROL_PWROFF 0x0050 |
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#define MT9P031_PLL_CONTROL_PWRON 0x0051 |
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#define MT9P031_PLL_CONTROL_USEPLL 0x0052 |
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struct mt9m032 { |
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struct v4l2_subdev subdev; |
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struct media_pad pad; |
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struct mt9m032_platform_data *pdata; |
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unsigned int pix_clock; |
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struct v4l2_ctrl_handler ctrls; |
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struct { |
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struct v4l2_ctrl *hflip; |
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struct v4l2_ctrl *vflip; |
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}; |
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struct mutex lock; /* Protects streaming, format, interval and crop */ |
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bool streaming; |
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struct v4l2_mbus_framefmt format; |
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struct v4l2_rect crop; |
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struct v4l2_fract frame_interval; |
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}; |
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#define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev) |
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#define to_dev(sensor) \ |
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(&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev) |
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static int mt9m032_read(struct i2c_client *client, 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 mt9m032_write(struct i2c_client *client, u8 reg, 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 u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width) |
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{ |
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unsigned int effective_width; |
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u32 ns; |
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effective_width = width + 716; /* empirical value */ |
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ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock); |
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dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns); |
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return ns; |
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} |
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static int mt9m032_update_timing(struct mt9m032 *sensor, |
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struct v4l2_fract *interval) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
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struct v4l2_rect *crop = &sensor->crop; |
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unsigned int min_vblank; |
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unsigned int vblank; |
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u32 row_time; |
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if (!interval) |
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interval = &sensor->frame_interval; |
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row_time = mt9m032_row_time(sensor, crop->width); |
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vblank = div_u64(1000000000ULL * interval->numerator, |
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(u64)row_time * interval->denominator) |
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- crop->height; |
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if (vblank > MT9M032_VBLANK_MAX) { |
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/* hardware limits to 11 bit values */ |
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interval->denominator = 1000; |
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interval->numerator = |
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div_u64((crop->height + MT9M032_VBLANK_MAX) * |
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(u64)row_time * interval->denominator, |
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1000000000ULL); |
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vblank = div_u64(1000000000ULL * interval->numerator, |
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(u64)row_time * interval->denominator) |
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- crop->height; |
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} |
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/* enforce minimal 1.6ms blanking time. */ |
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min_vblank = 1600000 / row_time; |
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vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX); |
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return mt9m032_write(client, MT9M032_VBLANK, vblank); |
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} |
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static int mt9m032_update_geom_timing(struct mt9m032 *sensor) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
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int ret; |
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ret = mt9m032_write(client, MT9M032_COLUMN_SIZE, |
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sensor->crop.width - 1); |
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if (!ret) |
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ret = mt9m032_write(client, MT9M032_ROW_SIZE, |
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sensor->crop.height - 1); |
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if (!ret) |
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ret = mt9m032_write(client, MT9M032_COLUMN_START, |
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sensor->crop.left); |
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if (!ret) |
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ret = mt9m032_write(client, MT9M032_ROW_START, |
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sensor->crop.top); |
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if (!ret) |
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ret = mt9m032_update_timing(sensor, NULL); |
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return ret; |
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} |
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static int update_formatter2(struct mt9m032 *sensor, bool streaming) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
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u16 reg_val = MT9M032_FORMATTER2_DOUT_EN |
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| 0x0070; /* parts reserved! */ |
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/* possibly for changing to 14-bit mode */ |
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if (streaming) |
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reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */ |
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return mt9m032_write(client, MT9M032_FORMATTER2, reg_val); |
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} |
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static int mt9m032_setup_pll(struct mt9m032 *sensor) |
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{ |
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static const struct aptina_pll_limits limits = { |
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.ext_clock_min = 8000000, |
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.ext_clock_max = 16500000, |
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.int_clock_min = 2000000, |
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.int_clock_max = 24000000, |
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.out_clock_min = 322000000, |
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.out_clock_max = 693000000, |
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.pix_clock_max = 99000000, |
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.n_min = 1, |
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.n_max = 64, |
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.m_min = 16, |
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.m_max = 255, |
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.p1_min = 6, |
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.p1_max = 7, |
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}; |
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
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struct mt9m032_platform_data *pdata = sensor->pdata; |
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struct aptina_pll pll; |
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u16 reg_val; |
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int ret; |
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pll.ext_clock = pdata->ext_clock; |
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pll.pix_clock = pdata->pix_clock; |
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ret = aptina_pll_calculate(&client->dev, &limits, &pll); |
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if (ret < 0) |
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return ret; |
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sensor->pix_clock = pdata->pix_clock; |
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ret = mt9m032_write(client, MT9M032_PLL_CONFIG1, |
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(pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT) | |
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((pll.n - 1) & MT9M032_PLL_CONFIG1_PREDIV_MASK)); |
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if (!ret) |
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ret = mt9m032_write(client, MT9P031_PLL_CONTROL, |
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MT9P031_PLL_CONTROL_PWRON | |
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MT9P031_PLL_CONTROL_USEPLL); |
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if (!ret) /* more reserved, Continuous, Master Mode */ |
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ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8000 | |
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MT9M032_READ_MODE1_STROBE_START_EXP | |
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MT9M032_READ_MODE1_STROBE_END_SHUTTER); |
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if (!ret) { |
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reg_val = (pll.p1 == 6 ? MT9M032_FORMATTER1_PLL_P1_6 : 0) |
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| MT9M032_FORMATTER1_PARALLEL | 0x001e; /* 14-bit */ |
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ret = mt9m032_write(client, MT9M032_FORMATTER1, reg_val); |
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} |
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return ret; |
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} |
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/* ----------------------------------------------------------------------------- |
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* Subdev pad operations |
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*/ |
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static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_mbus_code_enum *code) |
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{ |
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if (code->index != 0) |
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return -EINVAL; |
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code->code = MEDIA_BUS_FMT_Y8_1X8; |
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return 0; |
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} |
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static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_frame_size_enum *fse) |
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{ |
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if (fse->index != 0 || fse->code != MEDIA_BUS_FMT_Y8_1X8) |
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return -EINVAL; |
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fse->min_width = MT9M032_COLUMN_SIZE_DEF; |
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fse->max_width = MT9M032_COLUMN_SIZE_DEF; |
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fse->min_height = MT9M032_ROW_SIZE_DEF; |
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fse->max_height = MT9M032_ROW_SIZE_DEF; |
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return 0; |
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} |
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/** |
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* __mt9m032_get_pad_crop() - get crop rect |
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* @sensor: pointer to the sensor struct |
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* @cfg: v4l2_subdev_pad_config for getting the try crop rect from |
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* @which: select try or active crop rect |
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* |
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* Returns a pointer the current active or fh relative try crop rect |
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*/ |
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static struct v4l2_rect * |
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__mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg, |
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enum v4l2_subdev_format_whence which) |
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{ |
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switch (which) { |
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case V4L2_SUBDEV_FORMAT_TRY: |
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return v4l2_subdev_get_try_crop(&sensor->subdev, cfg, 0); |
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case V4L2_SUBDEV_FORMAT_ACTIVE: |
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return &sensor->crop; |
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default: |
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return NULL; |
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} |
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} |
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/** |
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* __mt9m032_get_pad_format() - get format |
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* @sensor: pointer to the sensor struct |
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* @cfg: v4l2_subdev_pad_config for getting the try format from |
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* @which: select try or active format |
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* |
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* Returns a pointer the current active or fh relative try format |
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*/ |
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static struct v4l2_mbus_framefmt * |
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__mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg, |
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enum v4l2_subdev_format_whence which) |
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{ |
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switch (which) { |
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case V4L2_SUBDEV_FORMAT_TRY: |
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return v4l2_subdev_get_try_format(&sensor->subdev, cfg, 0); |
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case V4L2_SUBDEV_FORMAT_ACTIVE: |
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return &sensor->format; |
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default: |
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return NULL; |
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} |
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} |
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static int mt9m032_get_pad_format(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_format *fmt) |
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{ |
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struct mt9m032 *sensor = to_mt9m032(subdev); |
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mutex_lock(&sensor->lock); |
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fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which); |
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mutex_unlock(&sensor->lock); |
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return 0; |
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} |
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static int mt9m032_set_pad_format(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_format *fmt) |
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{ |
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struct mt9m032 *sensor = to_mt9m032(subdev); |
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int ret; |
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mutex_lock(&sensor->lock); |
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if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
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ret = -EBUSY; |
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goto done; |
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} |
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/* Scaling is not supported, the format is thus fixed. */ |
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fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which); |
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ret = 0; |
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done: |
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mutex_unlock(&sensor->lock); |
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return ret; |
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} |
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static int mt9m032_get_pad_selection(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_selection *sel) |
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{ |
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struct mt9m032 *sensor = to_mt9m032(subdev); |
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if (sel->target != V4L2_SEL_TGT_CROP) |
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return -EINVAL; |
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mutex_lock(&sensor->lock); |
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sel->r = *__mt9m032_get_pad_crop(sensor, cfg, sel->which); |
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mutex_unlock(&sensor->lock); |
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return 0; |
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} |
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static int mt9m032_set_pad_selection(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_selection *sel) |
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{ |
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struct mt9m032 *sensor = to_mt9m032(subdev); |
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struct v4l2_mbus_framefmt *format; |
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struct v4l2_rect *__crop; |
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struct v4l2_rect rect; |
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int ret = 0; |
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if (sel->target != V4L2_SEL_TGT_CROP) |
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return -EINVAL; |
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mutex_lock(&sensor->lock); |
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if (sensor->streaming && sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
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ret = -EBUSY; |
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goto done; |
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} |
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/* Clamp the crop rectangle boundaries and align them to a multiple of 2 |
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* pixels to ensure a GRBG Bayer pattern. |
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*/ |
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rect.left = clamp(ALIGN(sel->r.left, 2), MT9M032_COLUMN_START_MIN, |
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MT9M032_COLUMN_START_MAX); |
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rect.top = clamp(ALIGN(sel->r.top, 2), MT9M032_ROW_START_MIN, |
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MT9M032_ROW_START_MAX); |
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rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2), |
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MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX); |
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rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2), |
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MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX); |
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rect.width = min_t(unsigned int, rect.width, |
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MT9M032_PIXEL_ARRAY_WIDTH - rect.left); |
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rect.height = min_t(unsigned int, rect.height, |
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MT9M032_PIXEL_ARRAY_HEIGHT - rect.top); |
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__crop = __mt9m032_get_pad_crop(sensor, cfg, sel->which); |
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if (rect.width != __crop->width || rect.height != __crop->height) { |
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/* Reset the output image size if the crop rectangle size has |
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* been modified. |
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*/ |
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format = __mt9m032_get_pad_format(sensor, cfg, sel->which); |
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format->width = rect.width; |
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format->height = rect.height; |
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} |
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*__crop = rect; |
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sel->r = rect; |
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if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) |
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ret = mt9m032_update_geom_timing(sensor); |
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|
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done: |
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mutex_unlock(&sensor->lock); |
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return ret; |
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} |
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static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev, |
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struct v4l2_subdev_frame_interval *fi) |
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{ |
|
struct mt9m032 *sensor = to_mt9m032(subdev); |
|
|
|
mutex_lock(&sensor->lock); |
|
memset(fi, 0, sizeof(*fi)); |
|
fi->interval = sensor->frame_interval; |
|
mutex_unlock(&sensor->lock); |
|
|
|
return 0; |
|
} |
|
|
|
static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev, |
|
struct v4l2_subdev_frame_interval *fi) |
|
{ |
|
struct mt9m032 *sensor = to_mt9m032(subdev); |
|
int ret; |
|
|
|
mutex_lock(&sensor->lock); |
|
|
|
if (sensor->streaming) { |
|
ret = -EBUSY; |
|
goto done; |
|
} |
|
|
|
/* Avoid divisions by 0. */ |
|
if (fi->interval.denominator == 0) |
|
fi->interval.denominator = 1; |
|
|
|
ret = mt9m032_update_timing(sensor, &fi->interval); |
|
if (!ret) |
|
sensor->frame_interval = fi->interval; |
|
|
|
done: |
|
mutex_unlock(&sensor->lock); |
|
return ret; |
|
} |
|
|
|
static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming) |
|
{ |
|
struct mt9m032 *sensor = to_mt9m032(subdev); |
|
int ret; |
|
|
|
mutex_lock(&sensor->lock); |
|
ret = update_formatter2(sensor, streaming); |
|
if (!ret) |
|
sensor->streaming = streaming; |
|
mutex_unlock(&sensor->lock); |
|
|
|
return ret; |
|
} |
|
|
|
/* ----------------------------------------------------------------------------- |
|
* V4L2 subdev core operations |
|
*/ |
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
static int mt9m032_g_register(struct v4l2_subdev *sd, |
|
struct v4l2_dbg_register *reg) |
|
{ |
|
struct mt9m032 *sensor = to_mt9m032(sd); |
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
|
int val; |
|
|
|
if (reg->reg > 0xff) |
|
return -EINVAL; |
|
|
|
val = mt9m032_read(client, reg->reg); |
|
if (val < 0) |
|
return -EIO; |
|
|
|
reg->size = 2; |
|
reg->val = val; |
|
|
|
return 0; |
|
} |
|
|
|
static int mt9m032_s_register(struct v4l2_subdev *sd, |
|
const struct v4l2_dbg_register *reg) |
|
{ |
|
struct mt9m032 *sensor = to_mt9m032(sd); |
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
|
|
|
if (reg->reg > 0xff) |
|
return -EINVAL; |
|
|
|
return mt9m032_write(client, reg->reg, reg->val); |
|
} |
|
#endif |
|
|
|
/* ----------------------------------------------------------------------------- |
|
* V4L2 subdev control operations |
|
*/ |
|
|
|
static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip) |
|
{ |
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
|
int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT) |
|
| (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT) |
|
| MT9M032_READ_MODE2_ROW_BLC |
|
| 0x0007; |
|
|
|
return mt9m032_write(client, MT9M032_READ_MODE2, reg_val); |
|
} |
|
|
|
static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val) |
|
{ |
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
|
int digital_gain_val; /* in 1/8th (0..127) */ |
|
int analog_mul; /* 0 or 1 */ |
|
int analog_gain_val; /* in 1/16th. (0..63) */ |
|
u16 reg_val; |
|
|
|
digital_gain_val = 51; /* from setup example */ |
|
|
|
if (val < 63) { |
|
analog_mul = 0; |
|
analog_gain_val = val; |
|
} else { |
|
analog_mul = 1; |
|
analog_gain_val = val / 2; |
|
} |
|
|
|
/* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */ |
|
/* overall_gain = a_gain * (1 + digital_gain_val / 8) */ |
|
|
|
reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK) |
|
<< MT9M032_GAIN_DIGITAL_SHIFT) |
|
| ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT) |
|
| (analog_gain_val & MT9M032_GAIN_ANALOG_MASK); |
|
|
|
return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val); |
|
} |
|
|
|
static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) { |
|
/* round because of multiplier used for values >= 63 */ |
|
ctrl->val &= ~1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
struct mt9m032 *sensor = |
|
container_of(ctrl->handler, struct mt9m032, ctrls); |
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); |
|
int ret; |
|
|
|
switch (ctrl->id) { |
|
case V4L2_CID_GAIN: |
|
return mt9m032_set_gain(sensor, ctrl->val); |
|
|
|
case V4L2_CID_HFLIP: |
|
/* case V4L2_CID_VFLIP: -- In the same cluster */ |
|
return update_read_mode2(sensor, sensor->vflip->val, |
|
sensor->hflip->val); |
|
|
|
case V4L2_CID_EXPOSURE: |
|
ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH, |
|
(ctrl->val >> 16) & 0xffff); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW, |
|
ctrl->val & 0xffff); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct v4l2_ctrl_ops mt9m032_ctrl_ops = { |
|
.s_ctrl = mt9m032_set_ctrl, |
|
.try_ctrl = mt9m032_try_ctrl, |
|
}; |
|
|
|
/* -------------------------------------------------------------------------- */ |
|
|
|
static const struct v4l2_subdev_core_ops mt9m032_core_ops = { |
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
.g_register = mt9m032_g_register, |
|
.s_register = mt9m032_s_register, |
|
#endif |
|
}; |
|
|
|
static const struct v4l2_subdev_video_ops mt9m032_video_ops = { |
|
.s_stream = mt9m032_s_stream, |
|
.g_frame_interval = mt9m032_get_frame_interval, |
|
.s_frame_interval = mt9m032_set_frame_interval, |
|
}; |
|
|
|
static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = { |
|
.enum_mbus_code = mt9m032_enum_mbus_code, |
|
.enum_frame_size = mt9m032_enum_frame_size, |
|
.get_fmt = mt9m032_get_pad_format, |
|
.set_fmt = mt9m032_set_pad_format, |
|
.set_selection = mt9m032_set_pad_selection, |
|
.get_selection = mt9m032_get_pad_selection, |
|
}; |
|
|
|
static const struct v4l2_subdev_ops mt9m032_ops = { |
|
.core = &mt9m032_core_ops, |
|
.video = &mt9m032_video_ops, |
|
.pad = &mt9m032_pad_ops, |
|
}; |
|
|
|
/* ----------------------------------------------------------------------------- |
|
* Driver initialization and probing |
|
*/ |
|
|
|
static int mt9m032_probe(struct i2c_client *client, |
|
const struct i2c_device_id *devid) |
|
{ |
|
struct mt9m032_platform_data *pdata = client->dev.platform_data; |
|
struct i2c_adapter *adapter = client->adapter; |
|
struct mt9m032 *sensor; |
|
int chip_version; |
|
int ret; |
|
|
|
if (pdata == NULL) { |
|
dev_err(&client->dev, "No platform data\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { |
|
dev_warn(&client->dev, |
|
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); |
|
return -EIO; |
|
} |
|
|
|
if (!client->dev.platform_data) |
|
return -ENODEV; |
|
|
|
sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL); |
|
if (sensor == NULL) |
|
return -ENOMEM; |
|
|
|
mutex_init(&sensor->lock); |
|
|
|
sensor->pdata = pdata; |
|
|
|
v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops); |
|
sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; |
|
|
|
chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION); |
|
if (chip_version != MT9M032_CHIP_VERSION_VALUE) { |
|
dev_err(&client->dev, "MT9M032 not detected, wrong version " |
|
"0x%04x\n", chip_version); |
|
ret = -ENODEV; |
|
goto error_sensor; |
|
} |
|
|
|
dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n", |
|
client->addr); |
|
|
|
sensor->frame_interval.numerator = 1; |
|
sensor->frame_interval.denominator = 30; |
|
|
|
sensor->crop.left = MT9M032_COLUMN_START_DEF; |
|
sensor->crop.top = MT9M032_ROW_START_DEF; |
|
sensor->crop.width = MT9M032_COLUMN_SIZE_DEF; |
|
sensor->crop.height = MT9M032_ROW_SIZE_DEF; |
|
|
|
sensor->format.width = sensor->crop.width; |
|
sensor->format.height = sensor->crop.height; |
|
sensor->format.code = MEDIA_BUS_FMT_Y8_1X8; |
|
sensor->format.field = V4L2_FIELD_NONE; |
|
sensor->format.colorspace = V4L2_COLORSPACE_SRGB; |
|
|
|
v4l2_ctrl_handler_init(&sensor->ctrls, 5); |
|
|
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, |
|
V4L2_CID_GAIN, 0, 127, 1, 64); |
|
|
|
sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, |
|
&mt9m032_ctrl_ops, |
|
V4L2_CID_HFLIP, 0, 1, 1, 0); |
|
sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, |
|
&mt9m032_ctrl_ops, |
|
V4L2_CID_VFLIP, 0, 1, 1, 0); |
|
|
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, |
|
V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN, |
|
MT9M032_SHUTTER_WIDTH_MAX, 1, |
|
MT9M032_SHUTTER_WIDTH_DEF); |
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, |
|
V4L2_CID_PIXEL_RATE, pdata->pix_clock, |
|
pdata->pix_clock, 1, pdata->pix_clock); |
|
|
|
if (sensor->ctrls.error) { |
|
ret = sensor->ctrls.error; |
|
dev_err(&client->dev, "control initialization error %d\n", ret); |
|
goto error_ctrl; |
|
} |
|
|
|
v4l2_ctrl_cluster(2, &sensor->hflip); |
|
|
|
sensor->subdev.ctrl_handler = &sensor->ctrls; |
|
sensor->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; |
|
sensor->pad.flags = MEDIA_PAD_FL_SOURCE; |
|
ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad); |
|
if (ret < 0) |
|
goto error_ctrl; |
|
|
|
ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */ |
|
if (ret < 0) |
|
goto error_entity; |
|
ret = mt9m032_write(client, MT9M032_RESET, 0); /* reset off */ |
|
if (ret < 0) |
|
goto error_entity; |
|
|
|
ret = mt9m032_setup_pll(sensor); |
|
if (ret < 0) |
|
goto error_entity; |
|
usleep_range(10000, 11000); |
|
|
|
ret = v4l2_ctrl_handler_setup(&sensor->ctrls); |
|
if (ret < 0) |
|
goto error_entity; |
|
|
|
/* SIZE */ |
|
ret = mt9m032_update_geom_timing(sensor); |
|
if (ret < 0) |
|
goto error_entity; |
|
|
|
ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */ |
|
if (ret < 0) |
|
goto error_entity; |
|
ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */ |
|
if (ret < 0) |
|
goto error_entity; |
|
ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */ |
|
if (ret < 0) |
|
goto error_entity; |
|
ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */ |
|
if (ret < 0) |
|
goto error_entity; |
|
if (sensor->pdata->invert_pixclock) { |
|
ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL, |
|
MT9M032_PIX_CLK_CTRL_INV_PIXCLK); |
|
if (ret < 0) |
|
goto error_entity; |
|
} |
|
|
|
ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */ |
|
if (ret < 0) |
|
goto error_entity; |
|
msleep(100); |
|
ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */ |
|
if (ret < 0) |
|
goto error_entity; |
|
msleep(100); |
|
ret = update_formatter2(sensor, false); |
|
if (ret < 0) |
|
goto error_entity; |
|
|
|
return ret; |
|
|
|
error_entity: |
|
media_entity_cleanup(&sensor->subdev.entity); |
|
error_ctrl: |
|
v4l2_ctrl_handler_free(&sensor->ctrls); |
|
error_sensor: |
|
mutex_destroy(&sensor->lock); |
|
return ret; |
|
} |
|
|
|
static int mt9m032_remove(struct i2c_client *client) |
|
{ |
|
struct v4l2_subdev *subdev = i2c_get_clientdata(client); |
|
struct mt9m032 *sensor = to_mt9m032(subdev); |
|
|
|
v4l2_device_unregister_subdev(subdev); |
|
v4l2_ctrl_handler_free(&sensor->ctrls); |
|
media_entity_cleanup(&subdev->entity); |
|
mutex_destroy(&sensor->lock); |
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id mt9m032_id_table[] = { |
|
{ MT9M032_NAME, 0 }, |
|
{ } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, mt9m032_id_table); |
|
|
|
static struct i2c_driver mt9m032_i2c_driver = { |
|
.driver = { |
|
.name = MT9M032_NAME, |
|
}, |
|
.probe = mt9m032_probe, |
|
.remove = mt9m032_remove, |
|
.id_table = mt9m032_id_table, |
|
}; |
|
|
|
module_i2c_driver(mt9m032_i2c_driver); |
|
|
|
MODULE_AUTHOR("Martin Hostettler <[email protected]>"); |
|
MODULE_DESCRIPTION("MT9M032 camera sensor driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|