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linux-zen-server/drivers/media/i2c/ov772x.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* ov772x Camera Driver
*
* Copyright (C) 2017 Jacopo Mondi <jacopo+renesas@jmondi.org>
*
* Copyright (C) 2008 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* Based on ov7670 and soc_camera_platform driver,
*
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
#include <media/i2c/ov772x.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-subdev.h>
/*
* register offset
*/
#define GAIN 0x00 /* AGC - Gain control gain setting */
#define BLUE 0x01 /* AWB - Blue channel gain setting */
#define RED 0x02 /* AWB - Red channel gain setting */
#define GREEN 0x03 /* AWB - Green channel gain setting */
#define COM1 0x04 /* Common control 1 */
#define BAVG 0x05 /* U/B Average Level */
#define GAVG 0x06 /* Y/Gb Average Level */
#define RAVG 0x07 /* V/R Average Level */
#define AECH 0x08 /* Exposure Value - AEC MSBs */
#define COM2 0x09 /* Common control 2 */
#define PID 0x0A /* Product ID Number MSB */
#define VER 0x0B /* Product ID Number LSB */
#define COM3 0x0C /* Common control 3 */
#define COM4 0x0D /* Common control 4 */
#define COM5 0x0E /* Common control 5 */
#define COM6 0x0F /* Common control 6 */
#define AEC 0x10 /* Exposure Value */
#define CLKRC 0x11 /* Internal clock */
#define COM7 0x12 /* Common control 7 */
#define COM8 0x13 /* Common control 8 */
#define COM9 0x14 /* Common control 9 */
#define COM10 0x15 /* Common control 10 */
#define REG16 0x16 /* Register 16 */
#define HSTART 0x17 /* Horizontal sensor size */
#define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
#define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
#define VSIZE 0x1A /* Vertical sensor size */
#define PSHFT 0x1B /* Data format - pixel delay select */
#define MIDH 0x1C /* Manufacturer ID byte - high */
#define MIDL 0x1D /* Manufacturer ID byte - low */
#define LAEC 0x1F /* Fine AEC value */
#define COM11 0x20 /* Common control 11 */
#define BDBASE 0x22 /* Banding filter Minimum AEC value */
#define DBSTEP 0x23 /* Banding filter Maximum Setp */
#define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
#define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
#define VPT 0x26 /* AGC/AEC Fast mode operating region */
#define REG28 0x28 /* Register 28 */
#define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
#define EXHCH 0x2A /* Dummy pixel insert MSB */
#define EXHCL 0x2B /* Dummy pixel insert LSB */
#define VOUTSIZE 0x2C /* Vertical data output size MSBs */
#define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
#define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
#define YAVE 0x2F /* Y/G Channel Average value */
#define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
#define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
#define HREF 0x32 /* Image start and size control */
#define DM_LNL 0x33 /* Dummy line low 8 bits */
#define DM_LNH 0x34 /* Dummy line high 8 bits */
#define ADOFF_B 0x35 /* AD offset compensation value for B channel */
#define ADOFF_R 0x36 /* AD offset compensation value for R channel */
#define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
#define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
#define OFF_B 0x39 /* Analog process B channel offset value */
#define OFF_R 0x3A /* Analog process R channel offset value */
#define OFF_GB 0x3B /* Analog process Gb channel offset value */
#define OFF_GR 0x3C /* Analog process Gr channel offset value */
#define COM12 0x3D /* Common control 12 */
#define COM13 0x3E /* Common control 13 */
#define COM14 0x3F /* Common control 14 */
#define COM15 0x40 /* Common control 15*/
#define COM16 0x41 /* Common control 16 */
#define TGT_B 0x42 /* BLC blue channel target value */
#define TGT_R 0x43 /* BLC red channel target value */
#define TGT_GB 0x44 /* BLC Gb channel target value */
#define TGT_GR 0x45 /* BLC Gr channel target value */
/* for ov7720 */
#define LCC0 0x46 /* Lens correction control 0 */
#define LCC1 0x47 /* Lens correction option 1 - X coordinate */
#define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
#define LCC3 0x49 /* Lens correction option 3 */
#define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
#define LCC5 0x4B /* Lens correction option 5 */
#define LCC6 0x4C /* Lens correction option 6 */
/* for ov7725 */
#define LC_CTR 0x46 /* Lens correction control */
#define LC_XC 0x47 /* X coordinate of lens correction center relative */
#define LC_YC 0x48 /* Y coordinate of lens correction center relative */
#define LC_COEF 0x49 /* Lens correction coefficient */
#define LC_RADI 0x4A /* Lens correction radius */
#define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
#define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
#define FIXGAIN 0x4D /* Analog fix gain amplifer */
#define AREF0 0x4E /* Sensor reference control */
#define AREF1 0x4F /* Sensor reference current control */
#define AREF2 0x50 /* Analog reference control */
#define AREF3 0x51 /* ADC reference control */
#define AREF4 0x52 /* ADC reference control */
#define AREF5 0x53 /* ADC reference control */
#define AREF6 0x54 /* Analog reference control */
#define AREF7 0x55 /* Analog reference control */
#define UFIX 0x60 /* U channel fixed value output */
#define VFIX 0x61 /* V channel fixed value output */
#define AWBB_BLK 0x62 /* AWB option for advanced AWB */
#define AWB_CTRL0 0x63 /* AWB control byte 0 */
#define DSP_CTRL1 0x64 /* DSP control byte 1 */
#define DSP_CTRL2 0x65 /* DSP control byte 2 */
#define DSP_CTRL3 0x66 /* DSP control byte 3 */
#define DSP_CTRL4 0x67 /* DSP control byte 4 */
#define AWB_BIAS 0x68 /* AWB BLC level clip */
#define AWB_CTRL1 0x69 /* AWB control 1 */
#define AWB_CTRL2 0x6A /* AWB control 2 */
#define AWB_CTRL3 0x6B /* AWB control 3 */
#define AWB_CTRL4 0x6C /* AWB control 4 */
#define AWB_CTRL5 0x6D /* AWB control 5 */
#define AWB_CTRL6 0x6E /* AWB control 6 */
#define AWB_CTRL7 0x6F /* AWB control 7 */
#define AWB_CTRL8 0x70 /* AWB control 8 */
#define AWB_CTRL9 0x71 /* AWB control 9 */
#define AWB_CTRL10 0x72 /* AWB control 10 */
#define AWB_CTRL11 0x73 /* AWB control 11 */
#define AWB_CTRL12 0x74 /* AWB control 12 */
#define AWB_CTRL13 0x75 /* AWB control 13 */
#define AWB_CTRL14 0x76 /* AWB control 14 */
#define AWB_CTRL15 0x77 /* AWB control 15 */
#define AWB_CTRL16 0x78 /* AWB control 16 */
#define AWB_CTRL17 0x79 /* AWB control 17 */
#define AWB_CTRL18 0x7A /* AWB control 18 */
#define AWB_CTRL19 0x7B /* AWB control 19 */
#define AWB_CTRL20 0x7C /* AWB control 20 */
#define AWB_CTRL21 0x7D /* AWB control 21 */
#define GAM1 0x7E /* Gamma Curve 1st segment input end point */
#define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
#define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
#define GAM4 0x81 /* Gamma Curve 4th segment input end point */
#define GAM5 0x82 /* Gamma Curve 5th segment input end point */
#define GAM6 0x83 /* Gamma Curve 6th segment input end point */
#define GAM7 0x84 /* Gamma Curve 7th segment input end point */
#define GAM8 0x85 /* Gamma Curve 8th segment input end point */
#define GAM9 0x86 /* Gamma Curve 9th segment input end point */
#define GAM10 0x87 /* Gamma Curve 10th segment input end point */
#define GAM11 0x88 /* Gamma Curve 11th segment input end point */
#define GAM12 0x89 /* Gamma Curve 12th segment input end point */
#define GAM13 0x8A /* Gamma Curve 13th segment input end point */
#define GAM14 0x8B /* Gamma Curve 14th segment input end point */
#define GAM15 0x8C /* Gamma Curve 15th segment input end point */
#define SLOP 0x8D /* Gamma curve highest segment slope */
#define DNSTH 0x8E /* De-noise threshold */
#define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
#define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
#define DNSOFF 0x91 /* Auto De-noise threshold control */
#define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
#define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
#define MTX1 0x94 /* Matrix coefficient 1 */
#define MTX2 0x95 /* Matrix coefficient 2 */
#define MTX3 0x96 /* Matrix coefficient 3 */
#define MTX4 0x97 /* Matrix coefficient 4 */
#define MTX5 0x98 /* Matrix coefficient 5 */
#define MTX6 0x99 /* Matrix coefficient 6 */
#define MTX_CTRL 0x9A /* Matrix control */
#define BRIGHT 0x9B /* Brightness control */
#define CNTRST 0x9C /* Contrast contrast */
#define CNTRST_CTRL 0x9D /* Contrast contrast center */
#define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
#define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
#define SCAL0 0xA0 /* Scaling control 0 */
#define SCAL1 0xA1 /* Scaling control 1 */
#define SCAL2 0xA2 /* Scaling control 2 */
#define FIFODLYM 0xA3 /* FIFO manual mode delay control */
#define FIFODLYA 0xA4 /* FIFO auto mode delay control */
#define SDE 0xA6 /* Special digital effect control */
#define USAT 0xA7 /* U component saturation control */
#define VSAT 0xA8 /* V component saturation control */
/* for ov7720 */
#define HUE0 0xA9 /* Hue control 0 */
#define HUE1 0xAA /* Hue control 1 */
/* for ov7725 */
#define HUECOS 0xA9 /* Cosine value */
#define HUESIN 0xAA /* Sine value */
#define SIGN 0xAB /* Sign bit for Hue and contrast */
#define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
/*
* register detail
*/
/* COM2 */
#define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
/* Output drive capability */
#define OCAP_1x 0x00 /* 1x */
#define OCAP_2x 0x01 /* 2x */
#define OCAP_3x 0x02 /* 3x */
#define OCAP_4x 0x03 /* 4x */
/* COM3 */
#define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
#define IMG_MASK (VFLIP_IMG | HFLIP_IMG | SCOLOR_TEST)
#define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
#define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
#define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
#define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
#define SWAP_ML 0x08 /* Swap output MSB/LSB */
/* Tri-state option for output clock */
#define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
/* 1: No tri-state at this period */
/* Tri-state option for output data */
#define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
/* 1: No tri-state at this period */
#define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
/* COM4 */
/* PLL frequency control */
#define PLL_BYPASS 0x00 /* 00: Bypass PLL */
#define PLL_4x 0x40 /* 01: PLL 4x */
#define PLL_6x 0x80 /* 10: PLL 6x */
#define PLL_8x 0xc0 /* 11: PLL 8x */
/* AEC evaluate window */
#define AEC_FULL 0x00 /* 00: Full window */
#define AEC_1p2 0x10 /* 01: 1/2 window */
#define AEC_1p4 0x20 /* 10: 1/4 window */
#define AEC_2p3 0x30 /* 11: Low 2/3 window */
#define COM4_RESERVED 0x01 /* Reserved bit */
/* COM5 */
#define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
#define AFR_SPPED 0x40 /* Auto frame rate control speed selection */
/* Auto frame rate max rate control */
#define AFR_NO_RATE 0x00 /* No reduction of frame rate */
#define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
#define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
#define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
/* Auto frame rate active point control */
#define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
#define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
#define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
#define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
/* AEC max step control */
#define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
/* 1 : No limit to AEC increase step */
/* CLKRC */
/* Input clock divider register */
#define CLKRC_RESERVED 0x80 /* Reserved bit */
#define CLKRC_DIV(n) ((n) - 1)
/* COM7 */
/* SCCB Register Reset */
#define SCCB_RESET 0x80 /* 0 : No change */
/* 1 : Resets all registers to default */
/* Resolution selection */
#define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
#define SLCT_VGA 0x00 /* 0 : VGA */
#define SLCT_QVGA 0x40 /* 1 : QVGA */
#define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
#define SENSOR_RAW 0x10 /* Sensor RAW */
/* RGB output format control */
#define FMT_MASK 0x0c /* Mask of color format */
#define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
#define FMT_RGB565 0x04 /* 01 : RGB 565 */
#define FMT_RGB555 0x08 /* 10 : RGB 555 */
#define FMT_RGB444 0x0c /* 11 : RGB 444 */
/* Output format control */
#define OFMT_MASK 0x03 /* Mask of output format */
#define OFMT_YUV 0x00 /* 00 : YUV */
#define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
#define OFMT_RGB 0x02 /* 10 : RGB */
#define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
/* COM8 */
#define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
/* AEC Setp size limit */
#define UNLMT_STEP 0x40 /* 0 : Step size is limited */
/* 1 : Unlimited step size */
#define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
#define AEC_BND 0x10 /* Enable AEC below banding value */
#define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
#define AGC_ON 0x04 /* AGC Enable */
#define AWB_ON 0x02 /* AWB Enable */
#define AEC_ON 0x01 /* AEC Enable */
/* COM9 */
#define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
/* Automatic gain ceiling - maximum AGC value */
#define GAIN_2x 0x00 /* 000 : 2x */
#define GAIN_4x 0x10 /* 001 : 4x */
#define GAIN_8x 0x20 /* 010 : 8x */
#define GAIN_16x 0x30 /* 011 : 16x */
#define GAIN_32x 0x40 /* 100 : 32x */
#define GAIN_64x 0x50 /* 101 : 64x */
#define GAIN_128x 0x60 /* 110 : 128x */
#define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
#define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
/* COM11 */
#define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
#define SGLF_TRIG 0x01 /* Single frame transfer trigger */
/* HREF */
#define HREF_VSTART_SHIFT 6 /* VSTART LSB */
#define HREF_HSTART_SHIFT 4 /* HSTART 2 LSBs */
#define HREF_VSIZE_SHIFT 2 /* VSIZE LSB */
#define HREF_HSIZE_SHIFT 0 /* HSIZE 2 LSBs */
/* EXHCH */
#define EXHCH_VSIZE_SHIFT 2 /* VOUTSIZE LSB */
#define EXHCH_HSIZE_SHIFT 0 /* HOUTSIZE 2 LSBs */
/* DSP_CTRL1 */
#define FIFO_ON 0x80 /* FIFO enable/disable selection */
#define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
#define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
#define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
#define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
#define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
#define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
#define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
/* DSP_CTRL3 */
#define UV_MASK 0x80 /* UV output sequence option */
#define UV_ON 0x80 /* ON */
#define UV_OFF 0x00 /* OFF */
#define CBAR_MASK 0x20 /* DSP Color bar mask */
#define CBAR_ON 0x20 /* ON */
#define CBAR_OFF 0x00 /* OFF */
/* DSP_CTRL4 */
#define DSP_OFMT_YUV 0x00
#define DSP_OFMT_RGB 0x00
#define DSP_OFMT_RAW8 0x02
#define DSP_OFMT_RAW10 0x03
/* DSPAUTO (DSP Auto Function ON/OFF Control) */
#define AWB_ACTRL 0x80 /* AWB auto threshold control */
#define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
#define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
#define UV_ACTRL 0x10 /* UV adjust auto slope control */
#define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
#define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
#define OV772X_MAX_WIDTH VGA_WIDTH
#define OV772X_MAX_HEIGHT VGA_HEIGHT
/*
* ID
*/
#define OV7720 0x7720
#define OV7725 0x7721
#define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
/*
* PLL multipliers
*/
static struct {
unsigned int mult;
u8 com4;
} ov772x_pll[] = {
{ 1, PLL_BYPASS, },
{ 4, PLL_4x, },
{ 6, PLL_6x, },
{ 8, PLL_8x, },
};
/*
* struct
*/
struct ov772x_color_format {
u32 code;
enum v4l2_colorspace colorspace;
u8 dsp3;
u8 dsp4;
u8 com3;
u8 com7;
};
struct ov772x_win_size {
char *name;
unsigned char com7_bit;
unsigned int sizeimage;
struct v4l2_rect rect;
};
struct ov772x_priv {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
struct clk *clk;
struct regmap *regmap;
struct ov772x_camera_info *info;
struct gpio_desc *pwdn_gpio;
struct gpio_desc *rstb_gpio;
const struct ov772x_color_format *cfmt;
const struct ov772x_win_size *win;
struct v4l2_ctrl *vflip_ctrl;
struct v4l2_ctrl *hflip_ctrl;
unsigned int test_pattern;
/* band_filter = COM8[5] ? 256 - BDBASE : 0 */
struct v4l2_ctrl *band_filter_ctrl;
unsigned int fps;
/* lock to protect power_count and streaming */
struct mutex lock;
int power_count;
int streaming;
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_pad pad;
#endif
enum v4l2_mbus_type bus_type;
};
/*
* supported color format list
*/
static const struct ov772x_color_format ov772x_cfmts[] = {
{
.code = MEDIA_BUS_FMT_YUYV8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = SWAP_YUV,
.com7 = OFMT_YUV,
},
{
.code = MEDIA_BUS_FMT_YVYU8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = UV_ON,
.dsp4 = DSP_OFMT_YUV,
.com3 = SWAP_YUV,
.com7 = OFMT_YUV,
},
{
.code = MEDIA_BUS_FMT_UYVY8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = 0x0,
.com7 = OFMT_YUV,
},
{
.code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = SWAP_RGB,
.com7 = FMT_RGB555 | OFMT_RGB,
},
{
.code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = 0x0,
.com7 = FMT_RGB555 | OFMT_RGB,
},
{
.code = MEDIA_BUS_FMT_RGB565_2X8_LE,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = SWAP_RGB,
.com7 = FMT_RGB565 | OFMT_RGB,
},
{
.code = MEDIA_BUS_FMT_RGB565_2X8_BE,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_YUV,
.com3 = 0x0,
.com7 = FMT_RGB565 | OFMT_RGB,
},
{
/* Setting DSP4 to DSP_OFMT_RAW8 still gives 10-bit output,
* regardless of the COM7 value. We can thus only support 10-bit
* Bayer until someone figures it out.
*/
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.colorspace = V4L2_COLORSPACE_SRGB,
.dsp3 = 0x0,
.dsp4 = DSP_OFMT_RAW10,
.com3 = 0x0,
.com7 = SENSOR_RAW | OFMT_BRAW,
},
};
/*
* window size list
*/
static const struct ov772x_win_size ov772x_win_sizes[] = {
{
.name = "VGA",
.com7_bit = SLCT_VGA,
.sizeimage = 510 * 748,
.rect = {
.left = 140,
.top = 14,
.width = VGA_WIDTH,
.height = VGA_HEIGHT,
},
}, {
.name = "QVGA",
.com7_bit = SLCT_QVGA,
.sizeimage = 278 * 576,
.rect = {
.left = 252,
.top = 6,
.width = QVGA_WIDTH,
.height = QVGA_HEIGHT,
},
},
};
static const char * const ov772x_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bar Type 1",
};
/*
* frame rate settings lists
*/
static const unsigned int ov772x_frame_intervals[] = { 5, 10, 15, 20, 30, 60 };
/*
* general function
*/
static struct ov772x_priv *to_ov772x(struct v4l2_subdev *sd)
{
return container_of(sd, struct ov772x_priv, subdev);
}
static int ov772x_reset(struct ov772x_priv *priv)
{
int ret;
ret = regmap_write(priv->regmap, COM7, SCCB_RESET);
if (ret < 0)
return ret;
usleep_range(1000, 5000);
return regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
SOFT_SLEEP_MODE);
}
/*
* subdev ops
*/
static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov772x_priv *priv = to_ov772x(sd);
int ret = 0;
mutex_lock(&priv->lock);
if (priv->streaming == enable)
goto done;
if (priv->bus_type == V4L2_MBUS_BT656) {
ret = regmap_update_bits(priv->regmap, COM7, ITU656_ON_OFF,
enable ?
ITU656_ON_OFF : ~ITU656_ON_OFF);
if (ret)
goto done;
}
ret = regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
enable ? 0 : SOFT_SLEEP_MODE);
if (ret)
goto done;
if (enable) {
dev_dbg(&client->dev, "format %d, win %s\n",
priv->cfmt->code, priv->win->name);
}
priv->streaming = enable;
done:
mutex_unlock(&priv->lock);
return ret;
}
static unsigned int ov772x_select_fps(struct ov772x_priv *priv,
struct v4l2_fract *tpf)
{
unsigned int fps = tpf->numerator ?
tpf->denominator / tpf->numerator :
tpf->denominator;
unsigned int best_diff;
unsigned int diff;
unsigned int idx;
unsigned int i;
/* Approximate to the closest supported frame interval. */
best_diff = ~0L;
for (i = 0, idx = 0; i < ARRAY_SIZE(ov772x_frame_intervals); i++) {
diff = abs(fps - ov772x_frame_intervals[i]);
if (diff < best_diff) {
idx = i;
best_diff = diff;
}
}
return ov772x_frame_intervals[idx];
}
static int ov772x_set_frame_rate(struct ov772x_priv *priv,
unsigned int fps,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
{
unsigned long fin = clk_get_rate(priv->clk);
unsigned int best_diff;
unsigned int fsize;
unsigned int pclk;
unsigned int diff;
unsigned int i;
u8 clkrc = 0;
u8 com4 = 0;
int ret;
/* Use image size (with blankings) to calculate desired pixel clock. */
switch (cfmt->com7 & OFMT_MASK) {
case OFMT_BRAW:
fsize = win->sizeimage;
break;
case OFMT_RGB:
case OFMT_YUV:
default:
fsize = win->sizeimage * 2;
break;
}
pclk = fps * fsize;
/*
* Pixel clock generation circuit is pretty simple:
*
* Fin -> [ / CLKRC_div] -> [ * PLL_mult] -> pclk
*
* Try to approximate the desired pixel clock testing all available
* PLL multipliers (1x, 4x, 6x, 8x) and calculate corresponding
* divisor with:
*
* div = PLL_mult * Fin / pclk
*
* and re-calculate the pixel clock using it:
*
* pclk = Fin * PLL_mult / CLKRC_div
*
* Choose the PLL_mult and CLKRC_div pair that gives a pixel clock
* closer to the desired one.
*
* The desired pixel clock is calculated using a known frame size
* (blanking included) and FPS.
*/
best_diff = ~0L;
for (i = 0; i < ARRAY_SIZE(ov772x_pll); i++) {
unsigned int pll_mult = ov772x_pll[i].mult;
unsigned int pll_out = pll_mult * fin;
unsigned int t_pclk;
unsigned int div;
if (pll_out < pclk)
continue;
div = DIV_ROUND_CLOSEST(pll_out, pclk);
t_pclk = DIV_ROUND_CLOSEST(fin * pll_mult, div);
diff = abs(pclk - t_pclk);
if (diff < best_diff) {
best_diff = diff;
clkrc = CLKRC_DIV(div);
com4 = ov772x_pll[i].com4;
}
}
ret = regmap_write(priv->regmap, COM4, com4 | COM4_RESERVED);
if (ret < 0)
return ret;
ret = regmap_write(priv->regmap, CLKRC, clkrc | CLKRC_RESERVED);
if (ret < 0)
return ret;
return 0;
}
static int ov772x_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *ival)
{
struct ov772x_priv *priv = to_ov772x(sd);
struct v4l2_fract *tpf = &ival->interval;
tpf->numerator = 1;
tpf->denominator = priv->fps;
return 0;
}
static int ov772x_s_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *ival)
{
struct ov772x_priv *priv = to_ov772x(sd);
struct v4l2_fract *tpf = &ival->interval;
unsigned int fps;
int ret = 0;
mutex_lock(&priv->lock);
if (priv->streaming) {
ret = -EBUSY;
goto error;
}
fps = ov772x_select_fps(priv, tpf);
/*
* If the device is not powered up by the host driver do
* not apply any changes to H/W at this time. Instead
* the frame rate will be restored right after power-up.
*/
if (priv->power_count > 0) {
ret = ov772x_set_frame_rate(priv, fps, priv->cfmt, priv->win);
if (ret)
goto error;
}
tpf->numerator = 1;
tpf->denominator = fps;
priv->fps = fps;
error:
mutex_unlock(&priv->lock);
return ret;
}
static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov772x_priv *priv = container_of(ctrl->handler,
struct ov772x_priv, hdl);
struct regmap *regmap = priv->regmap;
int ret = 0;
u8 val;
/* v4l2_ctrl_lock() locks our own mutex */
/*
* If the device is not powered up by the host driver do
* not apply any controls to H/W at this time. Instead
* the controls will be restored right after power-up.
*/
if (priv->power_count == 0)
return 0;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
val = ctrl->val ? VFLIP_IMG : 0x00;
if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
val ^= VFLIP_IMG;
return regmap_update_bits(regmap, COM3, VFLIP_IMG, val);
case V4L2_CID_HFLIP:
val = ctrl->val ? HFLIP_IMG : 0x00;
if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
val ^= HFLIP_IMG;
return regmap_update_bits(regmap, COM3, HFLIP_IMG, val);
case V4L2_CID_BAND_STOP_FILTER:
if (!ctrl->val) {
/* Switch the filter off, it is on now */
ret = regmap_update_bits(regmap, BDBASE, 0xff, 0xff);
if (!ret)
ret = regmap_update_bits(regmap, COM8,
BNDF_ON_OFF, 0);
} else {
/* Switch the filter on, set AEC low limit */
val = 256 - ctrl->val;
ret = regmap_update_bits(regmap, COM8,
BNDF_ON_OFF, BNDF_ON_OFF);
if (!ret)
ret = regmap_update_bits(regmap, BDBASE,
0xff, val);
}
return ret;
case V4L2_CID_TEST_PATTERN:
priv->test_pattern = ctrl->val;
return 0;
}
return -EINVAL;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov772x_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct ov772x_priv *priv = to_ov772x(sd);
int ret;
unsigned int val;
reg->size = 1;
if (reg->reg > 0xff)
return -EINVAL;
ret = regmap_read(priv->regmap, reg->reg, &val);
if (ret < 0)
return ret;
reg->val = (__u64)val;
return 0;
}
static int ov772x_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct ov772x_priv *priv = to_ov772x(sd);
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
return regmap_write(priv->regmap, reg->reg, reg->val);
}
#endif
static int ov772x_power_on(struct ov772x_priv *priv)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
int ret;
if (priv->clk) {
ret = clk_prepare_enable(priv->clk);
if (ret)
return ret;
}
if (priv->pwdn_gpio) {
gpiod_set_value(priv->pwdn_gpio, 1);
usleep_range(500, 1000);
}
/*
* FIXME: The reset signal is connected to a shared GPIO on some
* platforms (namely the SuperH Migo-R). Until a framework becomes
* available to handle this cleanly, request the GPIO temporarily
* to avoid conflicts.
*/
priv->rstb_gpio = gpiod_get_optional(&client->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(priv->rstb_gpio)) {
dev_info(&client->dev, "Unable to get GPIO \"reset\"");
clk_disable_unprepare(priv->clk);
return PTR_ERR(priv->rstb_gpio);
}
if (priv->rstb_gpio) {
gpiod_set_value(priv->rstb_gpio, 1);
usleep_range(500, 1000);
gpiod_set_value(priv->rstb_gpio, 0);
usleep_range(500, 1000);
gpiod_put(priv->rstb_gpio);
}
return 0;
}
static int ov772x_power_off(struct ov772x_priv *priv)
{
clk_disable_unprepare(priv->clk);
if (priv->pwdn_gpio) {
gpiod_set_value(priv->pwdn_gpio, 0);
usleep_range(500, 1000);
}
return 0;
}
static int ov772x_set_params(struct ov772x_priv *priv,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win);
static int ov772x_s_power(struct v4l2_subdev *sd, int on)
{
struct ov772x_priv *priv = to_ov772x(sd);
int ret = 0;
mutex_lock(&priv->lock);
/* If the power count is modified from 0 to != 0 or from != 0 to 0,
* update the power state.
*/
if (priv->power_count == !on) {
if (on) {
ret = ov772x_power_on(priv);
/*
* Restore the format, the frame rate, and
* the controls
*/
if (!ret)
ret = ov772x_set_params(priv, priv->cfmt,
priv->win);
} else {
ret = ov772x_power_off(priv);
}
}
if (!ret) {
/* Update the power count. */
priv->power_count += on ? 1 : -1;
WARN(priv->power_count < 0, "Unbalanced power count\n");
WARN(priv->power_count > 1, "Duplicated s_power call\n");
}
mutex_unlock(&priv->lock);
return ret;
}
static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
{
const struct ov772x_win_size *win = &ov772x_win_sizes[0];
u32 best_diff = UINT_MAX;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(ov772x_win_sizes); ++i) {
u32 diff = abs(width - ov772x_win_sizes[i].rect.width)
+ abs(height - ov772x_win_sizes[i].rect.height);
if (diff < best_diff) {
best_diff = diff;
win = &ov772x_win_sizes[i];
}
}
return win;
}
static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
const struct ov772x_color_format **cfmt,
const struct ov772x_win_size **win)
{
unsigned int i;
/* Select a format. */
*cfmt = &ov772x_cfmts[0];
for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
if (mf->code == ov772x_cfmts[i].code) {
*cfmt = &ov772x_cfmts[i];
break;
}
}
/* Select a window size. */
*win = ov772x_select_win(mf->width, mf->height);
}
static int ov772x_edgectrl(struct ov772x_priv *priv)
{
struct regmap *regmap = priv->regmap;
int ret;
if (!priv->info)
return 0;
if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
/*
* Manual Edge Control Mode.
*
* Edge auto strength bit is set by default.
* Remove it when manual mode.
*/
ret = regmap_update_bits(regmap, DSPAUTO, EDGE_ACTRL, 0x00);
if (ret < 0)
return ret;
ret = regmap_update_bits(regmap, EDGE_TRSHLD,
OV772X_EDGE_THRESHOLD_MASK,
priv->info->edgectrl.threshold);
if (ret < 0)
return ret;
ret = regmap_update_bits(regmap, EDGE_STRNGT,
OV772X_EDGE_STRENGTH_MASK,
priv->info->edgectrl.strength);
if (ret < 0)
return ret;
} else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
/*
* Auto Edge Control Mode.
*
* Set upper and lower limit.
*/
ret = regmap_update_bits(regmap, EDGE_UPPER,
OV772X_EDGE_UPPER_MASK,
priv->info->edgectrl.upper);
if (ret < 0)
return ret;
ret = regmap_update_bits(regmap, EDGE_LOWER,
OV772X_EDGE_LOWER_MASK,
priv->info->edgectrl.lower);
if (ret < 0)
return ret;
}
return 0;
}
static int ov772x_set_params(struct ov772x_priv *priv,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
{
int ret;
u8 val;
/* Reset hardware. */
ov772x_reset(priv);
/* Edge Ctrl. */
ret = ov772x_edgectrl(priv);
if (ret < 0)
return ret;
/* Format and window size. */
ret = regmap_write(priv->regmap, HSTART, win->rect.left >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, HSIZE, win->rect.width >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, VSTART, win->rect.top >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, VSIZE, win->rect.height >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, HOUTSIZE, win->rect.width >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, VOUTSIZE, win->rect.height >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, HREF,
((win->rect.top & 1) << HREF_VSTART_SHIFT) |
((win->rect.left & 3) << HREF_HSTART_SHIFT) |
((win->rect.height & 1) << HREF_VSIZE_SHIFT) |
((win->rect.width & 3) << HREF_HSIZE_SHIFT));
if (ret < 0)
goto ov772x_set_fmt_error;
ret = regmap_write(priv->regmap, EXHCH,
((win->rect.height & 1) << EXHCH_VSIZE_SHIFT) |
((win->rect.width & 3) << EXHCH_HSIZE_SHIFT));
if (ret < 0)
goto ov772x_set_fmt_error;
/* Set DSP_CTRL3. */
val = cfmt->dsp3;
if (val) {
ret = regmap_update_bits(priv->regmap, DSP_CTRL3, UV_MASK, val);
if (ret < 0)
goto ov772x_set_fmt_error;
}
/* DSP_CTRL4: AEC reference point and DSP output format. */
if (cfmt->dsp4) {
ret = regmap_write(priv->regmap, DSP_CTRL4, cfmt->dsp4);
if (ret < 0)
goto ov772x_set_fmt_error;
}
/* Set COM3. */
val = cfmt->com3;
if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
val |= VFLIP_IMG;
if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
val |= HFLIP_IMG;
if (priv->vflip_ctrl->val)
val ^= VFLIP_IMG;
if (priv->hflip_ctrl->val)
val ^= HFLIP_IMG;
if (priv->test_pattern)
val |= SCOLOR_TEST;
ret = regmap_update_bits(priv->regmap, COM3, SWAP_MASK | IMG_MASK, val);
if (ret < 0)
goto ov772x_set_fmt_error;
/* COM7: Sensor resolution and output format control. */
ret = regmap_write(priv->regmap, COM7, win->com7_bit | cfmt->com7);
if (ret < 0)
goto ov772x_set_fmt_error;
/* COM4, CLKRC: Set pixel clock and framerate. */
ret = ov772x_set_frame_rate(priv, priv->fps, cfmt, win);
if (ret < 0)
goto ov772x_set_fmt_error;
/* Set COM8. */
if (priv->band_filter_ctrl->val) {
unsigned short band_filter = priv->band_filter_ctrl->val;
ret = regmap_update_bits(priv->regmap, COM8,
BNDF_ON_OFF, BNDF_ON_OFF);
if (!ret)
ret = regmap_update_bits(priv->regmap, BDBASE,
0xff, 256 - band_filter);
if (ret < 0)
goto ov772x_set_fmt_error;
}
return ret;
ov772x_set_fmt_error:
ov772x_reset(priv);
return ret;
}
static int ov772x_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct ov772x_priv *priv = to_ov772x(sd);
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
sel->r.left = 0;
sel->r.top = 0;
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP:
sel->r.width = priv->win->rect.width;
sel->r.height = priv->win->rect.height;
return 0;
default:
return -EINVAL;
}
}
static int ov772x_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf = &format->format;
struct ov772x_priv *priv = to_ov772x(sd);
if (format->pad)
return -EINVAL;
mf->width = priv->win->rect.width;
mf->height = priv->win->rect.height;
mf->code = priv->cfmt->code;
mf->colorspace = priv->cfmt->colorspace;
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int ov772x_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct ov772x_priv *priv = to_ov772x(sd);
struct v4l2_mbus_framefmt *mf = &format->format;
const struct ov772x_color_format *cfmt;
const struct ov772x_win_size *win;
int ret = 0;
if (format->pad)
return -EINVAL;
ov772x_select_params(mf, &cfmt, &win);
mf->code = cfmt->code;
mf->width = win->rect.width;
mf->height = win->rect.height;
mf->field = V4L2_FIELD_NONE;
mf->colorspace = cfmt->colorspace;
mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
mf->quantization = V4L2_QUANTIZATION_DEFAULT;
mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
sd_state->pads->try_fmt = *mf;
return 0;
}
mutex_lock(&priv->lock);
if (priv->streaming) {
ret = -EBUSY;
goto error;
}
/*
* If the device is not powered up by the host driver do
* not apply any changes to H/W at this time. Instead
* the format will be restored right after power-up.
*/
if (priv->power_count > 0) {
ret = ov772x_set_params(priv, cfmt, win);
if (ret < 0)
goto error;
}
priv->win = win;
priv->cfmt = cfmt;
error:
mutex_unlock(&priv->lock);
return ret;
}
static int ov772x_video_probe(struct ov772x_priv *priv)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
int pid, ver, midh, midl;
const char *devname;
int ret;
ret = ov772x_power_on(priv);
if (ret < 0)
return ret;
/* Check and show product ID and manufacturer ID. */
ret = regmap_read(priv->regmap, PID, &pid);
if (ret < 0)
return ret;
ret = regmap_read(priv->regmap, VER, &ver);
if (ret < 0)
return ret;
switch (VERSION(pid, ver)) {
case OV7720:
devname = "ov7720";
break;
case OV7725:
devname = "ov7725";
break;
default:
dev_err(&client->dev,
"Product ID error %x:%x\n", pid, ver);
ret = -ENODEV;
goto done;
}
ret = regmap_read(priv->regmap, MIDH, &midh);
if (ret < 0)
return ret;
ret = regmap_read(priv->regmap, MIDL, &midl);
if (ret < 0)
return ret;
dev_info(&client->dev,
"%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
devname, pid, ver, midh, midl);
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov772x_power_off(priv);
return ret;
}
static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {
.s_ctrl = ov772x_s_ctrl,
};
static const struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
.log_status = v4l2_ctrl_subdev_log_status,
.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov772x_g_register,
.s_register = ov772x_s_register,
#endif
.s_power = ov772x_s_power,
};
static int ov772x_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_interval_enum *fie)
{
if (fie->pad || fie->index >= ARRAY_SIZE(ov772x_frame_intervals))
return -EINVAL;
if (fie->width != VGA_WIDTH && fie->width != QVGA_WIDTH)
return -EINVAL;
if (fie->height != VGA_HEIGHT && fie->height != QVGA_HEIGHT)
return -EINVAL;
fie->interval.numerator = 1;
fie->interval.denominator = ov772x_frame_intervals[fie->index];
return 0;
}
static int ov772x_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->pad || code->index >= ARRAY_SIZE(ov772x_cfmts))
return -EINVAL;
code->code = ov772x_cfmts[code->index].code;
return 0;
}
static const struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
.s_stream = ov772x_s_stream,
.s_frame_interval = ov772x_s_frame_interval,
.g_frame_interval = ov772x_g_frame_interval,
};
static const struct v4l2_subdev_pad_ops ov772x_subdev_pad_ops = {
.enum_frame_interval = ov772x_enum_frame_interval,
.enum_mbus_code = ov772x_enum_mbus_code,
.get_selection = ov772x_get_selection,
.get_fmt = ov772x_get_fmt,
.set_fmt = ov772x_set_fmt,
};
static const struct v4l2_subdev_ops ov772x_subdev_ops = {
.core = &ov772x_subdev_core_ops,
.video = &ov772x_subdev_video_ops,
.pad = &ov772x_subdev_pad_ops,
};
static int ov772x_parse_dt(struct i2c_client *client,
struct ov772x_priv *priv)
{
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_PARALLEL
};
struct fwnode_handle *ep;
int ret;
ep = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev), NULL);
if (!ep) {
dev_err(&client->dev, "Endpoint node not found\n");
return -EINVAL;
}
/*
* For backward compatibility with older DTS where the
* bus-type property was not mandatory, assume
* V4L2_MBUS_PARALLEL as it was the only supported bus at the
* time. v4l2_fwnode_endpoint_alloc_parse() will not fail if
* 'bus-type' is not specified.
*/
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
if (ret) {
bus_cfg = (struct v4l2_fwnode_endpoint)
{ .bus_type = V4L2_MBUS_BT656 };
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
if (ret)
goto error_fwnode_put;
}
priv->bus_type = bus_cfg.bus_type;
v4l2_fwnode_endpoint_free(&bus_cfg);
error_fwnode_put:
fwnode_handle_put(ep);
return ret;
}
/*
* i2c_driver function
*/
static int ov772x_probe(struct i2c_client *client)
{
struct ov772x_priv *priv;
int ret;
static const struct regmap_config ov772x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = DSPAUTO,
};
if (!client->dev.of_node && !client->dev.platform_data) {
dev_err(&client->dev,
"Missing ov772x platform data for non-DT device\n");
return -EINVAL;
}
priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->regmap = devm_regmap_init_sccb(client, &ov772x_regmap_config);
if (IS_ERR(priv->regmap)) {
dev_err(&client->dev, "Failed to allocate register map\n");
return PTR_ERR(priv->regmap);
}
priv->info = client->dev.platform_data;
mutex_init(&priv->lock);
v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
V4L2_SUBDEV_FL_HAS_EVENTS;
v4l2_ctrl_handler_init(&priv->hdl, 3);
/* Use our mutex for the controls */
priv->hdl.lock = &priv->lock;
priv->vflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
priv->hflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
priv->band_filter_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
V4L2_CID_BAND_STOP_FILTER,
0, 256, 1, 0);
v4l2_ctrl_new_std_menu_items(&priv->hdl, &ov772x_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov772x_test_pattern_menu) - 1,
0, 0, ov772x_test_pattern_menu);
priv->subdev.ctrl_handler = &priv->hdl;
if (priv->hdl.error) {
ret = priv->hdl.error;
goto error_ctrl_free;
}
priv->clk = clk_get(&client->dev, NULL);
if (IS_ERR(priv->clk)) {
dev_err(&client->dev, "Unable to get xclk clock\n");
ret = PTR_ERR(priv->clk);
goto error_ctrl_free;
}
priv->pwdn_gpio = gpiod_get_optional(&client->dev, "powerdown",
GPIOD_OUT_LOW);
if (IS_ERR(priv->pwdn_gpio)) {
dev_info(&client->dev, "Unable to get GPIO \"powerdown\"");
ret = PTR_ERR(priv->pwdn_gpio);
goto error_clk_put;
}
ret = ov772x_parse_dt(client, priv);
if (ret)
goto error_clk_put;
ret = ov772x_video_probe(priv);
if (ret < 0)
goto error_gpio_put;
#ifdef CONFIG_MEDIA_CONTROLLER
priv->pad.flags = MEDIA_PAD_FL_SOURCE;
priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
if (ret < 0)
goto error_gpio_put;
#endif
priv->cfmt = &ov772x_cfmts[0];
priv->win = &ov772x_win_sizes[0];
priv->fps = 15;
ret = v4l2_async_register_subdev(&priv->subdev);
if (ret)
goto error_entity_cleanup;
return 0;
error_entity_cleanup:
media_entity_cleanup(&priv->subdev.entity);
error_gpio_put:
if (priv->pwdn_gpio)
gpiod_put(priv->pwdn_gpio);
error_clk_put:
clk_put(priv->clk);
error_ctrl_free:
v4l2_ctrl_handler_free(&priv->hdl);
mutex_destroy(&priv->lock);
return ret;
}
static void ov772x_remove(struct i2c_client *client)
{
struct ov772x_priv *priv = to_ov772x(i2c_get_clientdata(client));
media_entity_cleanup(&priv->subdev.entity);
clk_put(priv->clk);
if (priv->pwdn_gpio)
gpiod_put(priv->pwdn_gpio);
v4l2_async_unregister_subdev(&priv->subdev);
v4l2_ctrl_handler_free(&priv->hdl);
mutex_destroy(&priv->lock);
}
static const struct i2c_device_id ov772x_id[] = {
{ "ov772x", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov772x_id);
static const struct of_device_id ov772x_of_match[] = {
{ .compatible = "ovti,ov7725", },
{ .compatible = "ovti,ov7720", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ov772x_of_match);
static struct i2c_driver ov772x_i2c_driver = {
.driver = {
.name = "ov772x",
.of_match_table = ov772x_of_match,
},
.probe_new = ov772x_probe,
.remove = ov772x_remove,
.id_table = ov772x_id,
};
module_i2c_driver(ov772x_i2c_driver);
MODULE_DESCRIPTION("V4L2 driver for OV772x image sensor");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");