diff options
Diffstat (limited to 'drivers/media/video/ov772x.c')
| -rw-r--r-- | drivers/media/video/ov772x.c | 1012 |
1 files changed, 1012 insertions, 0 deletions
diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c new file mode 100644 index 0000000..54b736f --- /dev/null +++ b/drivers/media/video/ov772x.c @@ -0,0 +1,1012 @@ +/* + * ov772x Camera Driver + * + * 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> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/videodev2.h> +#include <media/v4l2-chip-ident.h> +#include <media/v4l2-common.h> +#include <media/soc_camera.h> +#include <media/ov772x.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 EDGE0 0x8F /* Edge enhancement control 0 */ +#define EDGE1 0x90 /* Edge enhancement control 1 */ +#define DNSOFF 0x91 /* Auto De-noise threshold control */ +#define EDGE2 0x92 /* Edge enhancement strength low point control */ +#define EDGE3 0x93 /* Edge enhancement strength high point control */ +#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 0x38 + +#define VFIMG_ON_OFF 0x80 /* Vertical flip image ON/OFF selection */ +#define HMIMG_ON_OFF 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 */ + +/* COM5 */ +#define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */ +#define AFR_SPPED 0x40 /* Auto frame rate control speed slection */ + /* 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 */ + +/* 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 */ + /* RGB output format control */ +#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_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 */ + +/* EXHCH */ +#define VSIZE_LSB 0x04 /* Vertical data output size LSB */ + +/* 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 */ + +/* HSTART */ +#define HST_VGA 0x23 +#define HST_QVGA 0x3F + +/* HSIZE */ +#define HSZ_VGA 0xA0 +#define HSZ_QVGA 0x50 + +/* VSTART */ +#define VST_VGA 0x07 +#define VST_QVGA 0x03 + +/* VSIZE */ +#define VSZ_VGA 0xF0 +#define VSZ_QVGA 0x78 + +/* HOUTSIZE */ +#define HOSZ_VGA 0xA0 +#define HOSZ_QVGA 0x50 + +/* VOUTSIZE */ +#define VOSZ_VGA 0xF0 +#define VOSZ_QVGA 0x78 + +/* + * bit configure (32 bit) + * this is used in struct ov772x_color_format :: option + */ +#define OP_UV 0x00000001 +#define OP_SWAP_RGB 0x00000002 + +/* + * ID + */ +#define OV7720 0x7720 +#define OV7725 0x7721 +#define VERSION(pid, ver) ((pid<<8)|(ver&0xFF)) + +/* + * struct + */ +struct regval_list { + unsigned char reg_num; + unsigned char value; +}; + +struct ov772x_color_format { + char *name; + __u32 fourcc; + const struct regval_list *regs; + unsigned int option; +}; + +struct ov772x_win_size { + char *name; + __u32 width; + __u32 height; + unsigned char com7_bit; + const struct regval_list *regs; +}; + +struct ov772x_priv { + struct ov772x_camera_info *info; + struct i2c_client *client; + struct soc_camera_device icd; + const struct ov772x_color_format *fmt; + const struct ov772x_win_size *win; + int model; +}; + +#define ENDMARKER { 0xff, 0xff } + +/* + * register setting for color format + */ +static const struct regval_list ov772x_RGB555_regs[] = { + { COM3, 0x00 }, + { COM7, FMT_RGB555 | OFMT_RGB }, + ENDMARKER, +}; + +static const struct regval_list ov772x_RGB565_regs[] = { + { COM3, 0x00 }, + { COM7, FMT_RGB565 | OFMT_RGB }, + ENDMARKER, +}; + +static const struct regval_list ov772x_YYUV_regs[] = { + { COM3, SWAP_YUV }, + { COM7, OFMT_YUV }, + ENDMARKER, +}; + +static const struct regval_list ov772x_UVYY_regs[] = { + { COM3, 0x00 }, + { COM7, OFMT_YUV }, + ENDMARKER, +}; + + +/* + * register setting for window size + */ +static const struct regval_list ov772x_qvga_regs[] = { + { HSTART, HST_QVGA }, + { HSIZE, HSZ_QVGA }, + { VSTART, VST_QVGA }, + { VSIZE, VSZ_QVGA }, + { HOUTSIZE, HOSZ_QVGA }, + { VOUTSIZE, VOSZ_QVGA }, + ENDMARKER, +}; + +static const struct regval_list ov772x_vga_regs[] = { + { HSTART, HST_VGA }, + { HSIZE, HSZ_VGA }, + { VSTART, VST_VGA }, + { VSIZE, VSZ_VGA }, + { HOUTSIZE, HOSZ_VGA }, + { VOUTSIZE, VOSZ_VGA }, + ENDMARKER, +}; + +/* + * supported format list + */ + +#define SETFOURCC(type) .name = (#type), .fourcc = (V4L2_PIX_FMT_ ## type) +static const struct soc_camera_data_format ov772x_fmt_lists[] = { + { + SETFOURCC(YUYV), + .depth = 16, + .colorspace = V4L2_COLORSPACE_JPEG, + }, + { + SETFOURCC(YVYU), + .depth = 16, + .colorspace = V4L2_COLORSPACE_JPEG, + }, + { + SETFOURCC(UYVY), + .depth = 16, + .colorspace = V4L2_COLORSPACE_JPEG, + }, + { + SETFOURCC(RGB555), + .depth = 16, + .colorspace = V4L2_COLORSPACE_SRGB, + }, + { + SETFOURCC(RGB555X), + .depth = 16, + .colorspace = V4L2_COLORSPACE_SRGB, + }, + { + SETFOURCC(RGB565), + .depth = 16, + .colorspace = V4L2_COLORSPACE_SRGB, + }, + { + SETFOURCC(RGB565X), + .depth = 16, + .colorspace = V4L2_COLORSPACE_SRGB, + }, +}; + +/* + * color format list + */ +#define T_YUYV 0 +static const struct ov772x_color_format ov772x_cfmts[] = { + [T_YUYV] = { + SETFOURCC(YUYV), + .regs = ov772x_YYUV_regs, + }, + { + SETFOURCC(YVYU), + .regs = ov772x_YYUV_regs, + .option = OP_UV, + }, + { + SETFOURCC(UYVY), + .regs = ov772x_UVYY_regs, + }, + { + SETFOURCC(RGB555), + .regs = ov772x_RGB555_regs, + .option = OP_SWAP_RGB, + }, + { + SETFOURCC(RGB555X), + .regs = ov772x_RGB555_regs, + }, + { + SETFOURCC(RGB565), + .regs = ov772x_RGB565_regs, + .option = OP_SWAP_RGB, + }, + { + SETFOURCC(RGB565X), + .regs = ov772x_RGB565_regs, + }, +}; + + +/* + * window size list + */ +#define VGA_WIDTH 640 +#define VGA_HEIGHT 480 +#define QVGA_WIDTH 320 +#define QVGA_HEIGHT 240 +#define MAX_WIDTH VGA_WIDTH +#define MAX_HEIGHT VGA_HEIGHT + +static const struct ov772x_win_size ov772x_win_vga = { + .name = "VGA", + .width = VGA_WIDTH, + .height = VGA_HEIGHT, + .com7_bit = SLCT_VGA, + .regs = ov772x_vga_regs, +}; + +static const struct ov772x_win_size ov772x_win_qvga = { + .name = "QVGA", + .width = QVGA_WIDTH, + .height = QVGA_HEIGHT, + .com7_bit = SLCT_QVGA, + .regs = ov772x_qvga_regs, +}; + + +/* + * general function + */ + +static int ov772x_write_array(struct i2c_client *client, + const struct regval_list *vals) +{ + while (vals->reg_num != 0xff) { + int ret = i2c_smbus_write_byte_data(client, + vals->reg_num, + vals->value); + if (ret < 0) + return ret; + vals++; + } + return 0; +} + +static int ov772x_mask_set(struct i2c_client *client, + u8 command, + u8 mask, + u8 set) +{ + s32 val = i2c_smbus_read_byte_data(client, command); + val &= ~mask; + val |= set; + + return i2c_smbus_write_byte_data(client, command, val); +} + +static int ov772x_reset(struct i2c_client *client) +{ + int ret = i2c_smbus_write_byte_data(client, COM7, SCCB_RESET); + msleep(1); + return ret; +} + +/* + * soc_camera_ops function + */ + +static int ov772x_init(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + int ret = 0; + + if (priv->info->link.power) { + ret = priv->info->link.power(&priv->client->dev, 1); + if (ret < 0) + return ret; + } + + if (priv->info->link.reset) + ret = priv->info->link.reset(&priv->client->dev); + + return ret; +} + +static int ov772x_release(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + int ret = 0; + + if (priv->info->link.power) + ret = priv->info->link.power(&priv->client->dev, 0); + + return ret; +} + +static int ov772x_start_capture(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + int ret; + + if (!priv->win) + priv->win = &ov772x_win_vga; + if (!priv->fmt) + priv->fmt = &ov772x_cfmts[T_YUYV]; + + /* + * reset hardware + */ + ov772x_reset(priv->client); + + /* + * set color format + */ + ret = ov772x_write_array(priv->client, priv->fmt->regs); + if (ret < 0) + goto start_end; + + /* + * set size format + */ + ret = ov772x_write_array(priv->client, priv->win->regs); + if (ret < 0) + goto start_end; + + /* + * set COM7 bit ( QVGA or VGA ) + */ + ret = ov772x_mask_set(priv->client, + COM7, SLCT_MASK, priv->win->com7_bit); + if (ret < 0) + goto start_end; + + /* + * set UV setting + */ + if (priv->fmt->option & OP_UV) { + ret = ov772x_mask_set(priv->client, + DSP_CTRL3, UV_MASK, UV_ON); + if (ret < 0) + goto start_end; + } + + /* + * set SWAP setting + */ + if (priv->fmt->option & OP_SWAP_RGB) { + ret = ov772x_mask_set(priv->client, + COM3, SWAP_MASK, SWAP_RGB); + if (ret < 0) + goto start_end; + } + + dev_dbg(&icd->dev, + "format %s, win %s\n", priv->fmt->name, priv->win->name); + +start_end: + priv->fmt = NULL; + priv->win = NULL; + + return ret; +} + +static int ov772x_stop_capture(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + ov772x_reset(priv->client); + return 0; +} + +static int ov772x_set_bus_param(struct soc_camera_device *icd, + unsigned long flags) +{ + return 0; +} + +static unsigned long ov772x_query_bus_param(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + struct soc_camera_link *icl = priv->client->dev.platform_data; + unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER | + SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH | + priv->info->buswidth; + + return soc_camera_apply_sensor_flags(icl, flags); +} + +static int ov772x_get_chip_id(struct soc_camera_device *icd, + struct v4l2_chip_ident *id) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + + id->ident = priv->model; + id->revision = 0; + + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int ov772x_get_register(struct soc_camera_device *icd, + struct v4l2_register *reg) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + int ret; + + if (reg->reg > 0xff) + return -EINVAL; + + ret = i2c_smbus_read_byte_data(priv->client, reg->reg); + if (ret < 0) + return ret; + + reg->val = (__u64)ret; + + return 0; +} + +static int ov772x_set_register(struct soc_camera_device *icd, + struct v4l2_register *reg) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + + if (reg->reg > 0xff || + reg->val > 0xff) + return -EINVAL; + + return i2c_smbus_write_byte_data(priv->client, reg->reg, reg->val); +} +#endif + +static const struct ov772x_win_size* +ov772x_select_win(u32 width, u32 height) +{ + __u32 diff; + const struct ov772x_win_size *win; + + /* default is QVGA */ + diff = abs(width - ov772x_win_qvga.width) + + abs(height - ov772x_win_qvga.height); + win = &ov772x_win_qvga; + + /* VGA */ + if (diff > + abs(width - ov772x_win_vga.width) + + abs(height - ov772x_win_vga.height)) + win = &ov772x_win_vga; + + return win; +} + + +static int ov772x_set_fmt(struct soc_camera_device *icd, + __u32 pixfmt, + struct v4l2_rect *rect) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + int ret = -EINVAL; + int i; + + /* + * select format + */ + priv->fmt = NULL; + for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) { + if (pixfmt == ov772x_cfmts[i].fourcc) { + priv->fmt = ov772x_cfmts + i; + ret = 0; + break; + } + } + + /* + * select win + */ + priv->win = ov772x_select_win(rect->width, rect->height); + + return ret; +} + +static int ov772x_try_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct v4l2_pix_format *pix = &f->fmt.pix; + const struct ov772x_win_size *win; + + /* + * select suitable win + */ + win = ov772x_select_win(pix->width, pix->height); + + pix->width = win->width; + pix->height = win->height; + pix->field = V4L2_FIELD_NONE; + + return 0; +} + +static int ov772x_video_probe(struct soc_camera_device *icd) +{ + struct ov772x_priv *priv = container_of(icd, struct ov772x_priv, icd); + u8 pid, ver; + const char *devname; + + /* + * We must have a parent by now. And it cannot be a wrong one. + * So this entire test is completely redundant. + */ + if (!icd->dev.parent || + to_soc_camera_host(icd->dev.parent)->nr != icd->iface) + return -ENODEV; + + /* + * ov772x only use 8 or 10 bit bus width + */ + if (SOCAM_DATAWIDTH_10 != priv->info->buswidth && + SOCAM_DATAWIDTH_8 != priv->info->buswidth) { + dev_err(&icd->dev, "bus width error\n"); + return -ENODEV; + } + + icd->formats = ov772x_fmt_lists; + icd->num_formats = ARRAY_SIZE(ov772x_fmt_lists); + + /* + * check and show product ID and manufacturer ID + */ + pid = i2c_smbus_read_byte_data(priv->client, PID); + ver = i2c_smbus_read_byte_data(priv->client, VER); + + switch (VERSION(pid, ver)) { + case OV7720: + devname = "ov7720"; + priv->model = V4L2_IDENT_OV7720; + break; + case OV7725: + devname = "ov7725"; + priv->model = V4L2_IDENT_OV7725; + break; + default: + dev_err(&icd->dev, + "Product ID error %x:%x\n", pid, ver); + return -ENODEV; + } + + dev_info(&icd->dev, + "%s Product ID %0x:%0x Manufacturer ID %x:%x\n", + devname, + pid, + ver, + i2c_smbus_read_byte_data(priv->client, MIDH), + i2c_smbus_read_byte_data(priv->client, MIDL)); + + + return soc_camera_video_start(icd); +} + +static void ov772x_video_remove(struct soc_camera_device *icd) +{ + soc_camera_video_stop(icd); +} + +static struct soc_camera_ops ov772x_ops = { + .owner = THIS_MODULE, + .probe = ov772x_video_probe, + .remove = ov772x_video_remove, + .init = ov772x_init, + .release = ov772x_release, + .start_capture = ov772x_start_capture, + .stop_capture = ov772x_stop_capture, + .set_fmt = ov772x_set_fmt, + .try_fmt = ov772x_try_fmt, + .set_bus_param = ov772x_set_bus_param, + .query_bus_param = ov772x_query_bus_param, + .get_chip_id = ov772x_get_chip_id, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .get_register = ov772x_get_register, + .set_register = ov772x_set_register, +#endif +}; + +/* + * i2c_driver function + */ + +static int ov772x_probe(struct i2c_client *client, + const struct i2c_device_id *did) +{ + struct ov772x_priv *priv; + struct ov772x_camera_info *info; + struct soc_camera_device *icd; + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + int ret; + + info = client->dev.platform_data; + if (!info) + return -EINVAL; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&adapter->dev, + "I2C-Adapter doesn't support " + "I2C_FUNC_SMBUS_BYTE_DATA\n"); + return -EIO; + } + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->info = info; + priv->client = client; + i2c_set_clientdata(client, priv); + + icd = &priv->icd; + icd->ops = &ov772x_ops; + icd->control = &client->dev; + icd->width_max = MAX_WIDTH; + icd->height_max = MAX_HEIGHT; + icd->iface = priv->info->link.bus_id; + + ret = soc_camera_device_register(icd); + + if (ret) { + i2c_set_clientdata(client, NULL); + kfree(priv); + } + + return ret; +} + +static int ov772x_remove(struct i2c_client *client) +{ + struct ov772x_priv *priv = i2c_get_clientdata(client); + + soc_camera_device_unregister(&priv->icd); + i2c_set_clientdata(client, NULL); + kfree(priv); + return 0; +} + +static const struct i2c_device_id ov772x_id[] = { + { "ov772x", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ov772x_id); + +static struct i2c_driver ov772x_i2c_driver = { + .driver = { + .name = "ov772x", + }, + .probe = ov772x_probe, + .remove = ov772x_remove, + .id_table = ov772x_id, +}; + +/* + * module function + */ + +static int __init ov772x_module_init(void) +{ + return i2c_add_driver(&ov772x_i2c_driver); +} + +static void __exit ov772x_module_exit(void) +{ + i2c_del_driver(&ov772x_i2c_driver); +} + +module_init(ov772x_module_init); +module_exit(ov772x_module_exit); + +MODULE_DESCRIPTION("SoC Camera driver for ov772x"); +MODULE_AUTHOR("Kuninori Morimoto"); +MODULE_LICENSE("GPL v2"); |
