- 根目录:
- drivers
- media
- i2c
- soc_camera
- ov2640.c
/*
* ov2640 Camera Driver
*
* Copyright (C) 2010 Alberto Panizzo <maramaopercheseimorto@gmail.com>
*
* Based on ov772x, ov9640 drivers and previous non merged implementations.
*
* Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright (C) 2006, OmniVision
*
* 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/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
#include <media/soc_camera.h>
#include <media/v4l2-clk.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-image-sizes.h>
#define VAL_SET(x, mask, rshift, lshift) \
((((x) >> rshift) & mask) << lshift)
/*
* DSP registers
* register offset for BANK_SEL == BANK_SEL_DSP
*/
#define R_BYPASS 0x05 /* Bypass DSP */
#define R_BYPASS_DSP_BYPAS 0x01 /* Bypass DSP, sensor out directly */
#define R_BYPASS_USE_DSP 0x00 /* Use the internal DSP */
#define QS 0x44 /* Quantization Scale Factor */
#define CTRLI 0x50
#define CTRLI_LP_DP 0x80
#define CTRLI_ROUND 0x40
#define CTRLI_V_DIV_SET(x) VAL_SET(x, 0x3, 0, 3)
#define CTRLI_H_DIV_SET(x) VAL_SET(x, 0x3, 0, 0)
#define HSIZE 0x51 /* H_SIZE[7:0] (real/4) */
#define HSIZE_SET(x) VAL_SET(x, 0xFF, 2, 0)
#define VSIZE 0x52 /* V_SIZE[7:0] (real/4) */
#define VSIZE_SET(x) VAL_SET(x, 0xFF, 2, 0)
#define XOFFL 0x53 /* OFFSET_X[7:0] */
#define XOFFL_SET(x) VAL_SET(x, 0xFF, 0, 0)
#define YOFFL 0x54 /* OFFSET_Y[7:0] */
#define YOFFL_SET(x) VAL_SET(x, 0xFF, 0, 0)
#define VHYX 0x55 /* Offset and size completion */
#define VHYX_VSIZE_SET(x) VAL_SET(x, 0x1, (8+2), 7)
#define VHYX_HSIZE_SET(x) VAL_SET(x, 0x1, (8+2), 3)
#define VHYX_YOFF_SET(x) VAL_SET(x, 0x3, 8, 4)
#define VHYX_XOFF_SET(x) VAL_SET(x, 0x3, 8, 0)
#define DPRP 0x56
#define TEST 0x57 /* Horizontal size completion */
#define TEST_HSIZE_SET(x) VAL_SET(x, 0x1, (9+2), 7)
#define ZMOW 0x5A /* Zoom: Out Width OUTW[7:0] (real/4) */
#define ZMOW_OUTW_SET(x) VAL_SET(x, 0xFF, 2, 0)
#define ZMOH 0x5B /* Zoom: Out Height OUTH[7:0] (real/4) */
#define ZMOH_OUTH_SET(x) VAL_SET(x, 0xFF, 2, 0)
#define ZMHH 0x5C /* Zoom: Speed and H&W completion */
#define ZMHH_ZSPEED_SET(x) VAL_SET(x, 0x0F, 0, 4)
#define ZMHH_OUTH_SET(x) VAL_SET(x, 0x1, (8+2), 2)
#define ZMHH_OUTW_SET(x) VAL_SET(x, 0x3, (8+2), 0)
#define BPADDR 0x7C /* SDE Indirect Register Access: Address */
#define BPDATA 0x7D /* SDE Indirect Register Access: Data */
#define CTRL2 0x86 /* DSP Module enable 2 */
#define CTRL2_DCW_EN 0x20
#define CTRL2_SDE_EN 0x10
#define CTRL2_UV_ADJ_EN 0x08
#define CTRL2_UV_AVG_EN 0x04
#define CTRL2_CMX_EN 0x01
#define CTRL3 0x87 /* DSP Module enable 3 */
#define CTRL3_BPC_EN 0x80
#define CTRL3_WPC_EN 0x40
#define SIZEL 0x8C /* Image Size Completion */
#define SIZEL_HSIZE8_11_SET(x) VAL_SET(x, 0x1, 11, 6)
#define SIZEL_HSIZE8_SET(x) VAL_SET(x, 0x7, 0, 3)
#define SIZEL_VSIZE8_SET(x) VAL_SET(x, 0x7, 0, 0)
#define HSIZE8 0xC0 /* Image Horizontal Size HSIZE[10:3] */
#define HSIZE8_SET(x) VAL_SET(x, 0xFF, 3, 0)
#define VSIZE8 0xC1 /* Image Vertical Size VSIZE[10:3] */
#define VSIZE8_SET(x) VAL_SET(x, 0xFF, 3, 0)
#define CTRL0 0xC2 /* DSP Module enable 0 */
#define CTRL0_AEC_EN 0x80
#define CTRL0_AEC_SEL 0x40
#define CTRL0_STAT_SEL 0x20
#define CTRL0_VFIRST 0x10
#define CTRL0_YUV422 0x08
#define CTRL0_YUV_EN 0x04
#define CTRL0_RGB_EN 0x02
#define CTRL0_RAW_EN 0x01
#define CTRL1 0xC3 /* DSP Module enable 1 */
#define CTRL1_CIP 0x80
#define CTRL1_DMY 0x40
#define CTRL1_RAW_GMA 0x20
#define CTRL1_DG 0x10
#define CTRL1_AWB 0x08
#define CTRL1_AWB_GAIN 0x04
#define CTRL1_LENC 0x02
#define CTRL1_PRE 0x01
#define R_DVP_SP 0xD3 /* DVP output speed control */
#define R_DVP_SP_AUTO_MODE 0x80
#define R_DVP_SP_DVP_MASK 0x3F /* DVP PCLK = sysclk (48)/[6:0] (YUV0);
* = sysclk (48)/(2*[6:0]) (RAW);*/
#define IMAGE_MODE 0xDA /* Image Output Format Select */
#define IMAGE_MODE_Y8_DVP_EN 0x40
#define IMAGE_MODE_JPEG_EN 0x10
#define IMAGE_MODE_YUV422 0x00
#define IMAGE_MODE_RAW10 0x04 /* (DVP) */
#define IMAGE_MODE_RGB565 0x08
#define IMAGE_MODE_HREF_VSYNC 0x02 /* HREF timing select in DVP JPEG output
* mode (0 for HREF is same as sensor) */
#define IMAGE_MODE_LBYTE_FIRST 0x01 /* Byte swap enable for DVP
* 1: Low byte first UYVY (C2[4] =0)
* VYUY (C2[4] =1)
* 0: High byte first YUYV (C2[4]=0)
* YVYU (C2[4] = 1) */
#define RESET 0xE0 /* Reset */
#define RESET_MICROC 0x40
#define RESET_SCCB 0x20
#define RESET_JPEG 0x10
#define RESET_DVP 0x04
#define RESET_IPU 0x02
#define RESET_CIF 0x01
#define REGED 0xED /* Register ED */
#define REGED_CLK_OUT_DIS 0x10
#define MS_SP 0xF0 /* SCCB Master Speed */
#define SS_ID 0xF7 /* SCCB Slave ID */
#define SS_CTRL 0xF8 /* SCCB Slave Control */
#define SS_CTRL_ADD_AUTO_INC 0x20
#define SS_CTRL_EN 0x08
#define SS_CTRL_DELAY_CLK 0x04
#define SS_CTRL_ACC_EN 0x02
#define SS_CTRL_SEN_PASS_THR 0x01
#define MC_BIST 0xF9 /* Microcontroller misc register */
#define MC_BIST_RESET 0x80 /* Microcontroller Reset */
#define MC_BIST_BOOT_ROM_SEL 0x40
#define MC_BIST_12KB_SEL 0x20
#define MC_BIST_12KB_MASK 0x30
#define MC_BIST_512KB_SEL 0x08
#define MC_BIST_512KB_MASK 0x0C
#define MC_BIST_BUSY_BIT_R 0x02
#define MC_BIST_MC_RES_ONE_SH_W 0x02
#define MC_BIST_LAUNCH 0x01
#define BANK_SEL 0xFF /* Register Bank Select */
#define BANK_SEL_DSP 0x00
#define BANK_SEL_SENS 0x01
/*
* Sensor registers
* register offset for BANK_SEL == BANK_SEL_SENS
*/
#define GAIN 0x00 /* AGC - Gain control gain setting */
#define COM1 0x03 /* Common control 1 */
#define COM1_1_DUMMY_FR 0x40
#define COM1_3_DUMMY_FR 0x80
#define COM1_7_DUMMY_FR 0xC0
#define COM1_VWIN_LSB_UXGA 0x0F
#define COM1_VWIN_LSB_SVGA 0x0A
#define COM1_VWIN_LSB_CIF 0x06
#define REG04 0x04 /* Register 04 */
#define REG04_DEF 0x20 /* Always set */
#define REG04_HFLIP_IMG 0x80 /* Horizontal mirror image ON/OFF */
#define REG04_VFLIP_IMG 0x40 /* Vertical flip image ON/OFF */
#define REG04_VREF_EN 0x10
#define REG04_HREF_EN 0x08
#define REG04_AEC_SET(x) VAL_SET(x, 0x3, 0, 0)
#define REG08 0x08 /* Frame Exposure One-pin Control Pre-charge Row Num */
#define COM2 0x09 /* Common control 2 */
#define COM2_SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
/* Output drive capability */
#define COM2_OCAP_Nx_SET(N) (((N) - 1) & 0x03) /* N = [1x .. 4x] */
#define PID 0x0A /* Product ID Number MSB */
#define VER 0x0B /* Product ID Number LSB */
#define COM3 0x0C /* Common control 3 */
#define COM3_BAND_50H 0x04 /* 0 For Banding at 60H */
#define COM3_BAND_AUTO 0x02 /* Auto Banding */
#define COM3_SING_FR_SNAPSH 0x01 /* 0 For enable live video output after the
* snapshot sequence*/
#define AEC 0x10 /* AEC[9:2] Exposure Value */
#define CLKRC 0x11 /* Internal clock */
#define CLKRC_EN 0x80
#define CLKRC_DIV_SET(x) (((x) - 1) & 0x1F) /* CLK = XVCLK/(x) */
#define COM7 0x12 /* Common control 7 */
#define COM7_SRST 0x80 /* Initiates system reset. All registers are
* set to factory default values after which
* the chip resumes normal operation */
#define COM7_RES_UXGA 0x00 /* Resolution selectors for UXGA */
#define COM7_RES_SVGA 0x40 /* SVGA */
#define COM7_RES_CIF 0x20 /* CIF */
#define COM7_ZOOM_EN 0x04 /* Enable Zoom mode */
#define COM7_COLOR_BAR_TEST 0x02 /* Enable Color Bar Test Pattern */
#define COM8 0x13 /* Common control 8 */
#define COM8_DEF 0xC0 /* Banding filter ON/OFF */
#define COM8_BNDF_EN 0x20 /* Banding filter ON/OFF */
#define COM8_AGC_EN 0x04 /* AGC Auto/Manual control selection */
#define COM8_AEC_EN 0x01 /* Auto/Manual Exposure control */
#define COM9 0x14 /* Common control 9
* Automatic gain ceiling - maximum AGC value [7:5]*/
#define COM9_AGC_GAIN_2x 0x00 /* 000 : 2x */
#define COM9_AGC_GAIN_4x 0x20 /* 001 : 4x */
#define COM9_AGC_GAIN_8x 0x40 /* 010 : 8x */
#define COM9_AGC_GAIN_16x 0x60 /* 011 : 16x */
#define COM9_AGC_GAIN_32x 0x80 /* 100 : 32x */
#define COM9_AGC_GAIN_64x 0xA0 /* 101 : 64x */
#define COM9_AGC_GAIN_128x 0xC0 /* 110 : 128x */
#define COM10 0x15 /* Common control 10 */
#define COM10_PCLK_HREF 0x20 /* PCLK output qualified by HREF */
#define COM10_PCLK_RISE 0x10 /* Data is updated at the rising edge of
* PCLK (user can latch data at the next
* falling edge of PCLK).
* 0 otherwise. */
#define COM10_HREF_INV 0x08 /* Invert HREF polarity:
* HREF negative for valid data*/
#define COM10_VSINC_INV 0x02 /* Invert VSYNC polarity */
#define HSTART 0x17 /* Horizontal Window start MSB 8 bit */
#define HEND 0x18 /* Horizontal Window end MSB 8 bit */
#define VSTART 0x19 /* Vertical Window start MSB 8 bit */
#define VEND 0x1A /* Vertical Window end MSB 8 bit */
#define MIDH 0x1C /* Manufacturer ID byte - high */
#define MIDL 0x1D /* Manufacturer ID byte - low */
#define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
#define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
#define VV 0x26 /* AGC/AEC Fast mode operating region */
#define VV_HIGH_TH_SET(x) VAL_SET(x, 0xF, 0, 4)
#define VV_LOW_TH_SET(x) VAL_SET(x, 0xF, 0, 0)
#define REG2A 0x2A /* Dummy pixel insert MSB */
#define FRARL 0x2B /* Dummy pixel insert LSB */
#define ADDVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
#define ADDVFH 0x2E /* MSB of insert dummy lines in Vertical direction */
#define YAVG 0x2F /* Y/G Channel Average value */
#define REG32 0x32 /* Common Control 32 */
#define REG32_PCLK_DIV_2 0x80 /* PCLK freq divided by 2 */
#define REG32_PCLK_DIV_4 0xC0 /* PCLK freq divided by 4 */
#define ARCOM2 0x34 /* Zoom: Horizontal start point */
#define REG45 0x45 /* Register 45 */
#define FLL 0x46 /* Frame Length Adjustment LSBs */
#define FLH 0x47 /* Frame Length Adjustment MSBs */
#define COM19 0x48 /* Zoom: Vertical start point */
#define ZOOMS 0x49 /* Zoom: Vertical start point */
#define COM22 0x4B /* Flash light control */
#define COM25 0x4E /* For Banding operations */
#define BD50 0x4F /* 50Hz Banding AEC 8 LSBs */
#define BD60 0x50 /* 60Hz Banding AEC 8 LSBs */
#define REG5D 0x5D /* AVGsel[7:0], 16-zone average weight option */
#define REG5E 0x5E /* AVGsel[15:8], 16-zone average weight option */
#define REG5F 0x5F /* AVGsel[23:16], 16-zone average weight option */
#define REG60 0x60 /* AVGsel[31:24], 16-zone average weight option */
#define HISTO_LOW 0x61 /* Histogram Algorithm Low Level */
#define HISTO_HIGH 0x62 /* Histogram Algorithm High Level */
/*
* ID
*/
#define MANUFACTURER_ID 0x7FA2
#define PID_OV2640 0x2642
#define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
/*
* Struct
*/
struct regval_list {
u8 reg_num;
u8 value;
};
struct ov2640_win_size {
char *name;
u32 width;
u32 height;
const struct regval_list *regs;
};
struct ov2640_priv {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
u32 cfmt_code;
struct v4l2_clk *clk;
const struct ov2640_win_size *win;
struct soc_camera_subdev_desc ssdd_dt;
struct gpio_desc *resetb_gpio;
struct gpio_desc *pwdn_gpio;
};
/*
* Registers settings
*/
#define ENDMARKER { 0xff, 0xff }
static const struct regval_list ov2640_init_regs[] = {
{ BANK_SEL, BANK_SEL_DSP },
{ 0x2c, 0xff },
{ 0x2e, 0xdf },
{ BANK_SEL, BANK_SEL_SENS },
{ 0x3c, 0x32 },
{ CLKRC, CLKRC_DIV_SET(1) },
{ COM2, COM2_OCAP_Nx_SET(3) },
{ REG04, REG04_DEF | REG04_HREF_EN },
{ COM8, COM8_DEF | COM8_BNDF_EN | COM8_AGC_EN | COM8_AEC_EN },
{ COM9, COM9_AGC_GAIN_8x | 0x08},
{ 0x2c, 0x0c },
{ 0x33, 0x78 },
{ 0x3a, 0x33 },
{ 0x3b, 0xfb },
{ 0x3e, 0x00 },
{ 0x43, 0x11 },
{ 0x16, 0x10 },
{ 0x39, 0x02 },
{ 0x35, 0x88 },
{ 0x22, 0x0a },
{ 0x37, 0x40 },
{ 0x23, 0x00 },
{ ARCOM2, 0xa0 },
{ 0x06, 0x02 },
{ 0x06, 0x88 },
{ 0x07, 0xc0 },
{ 0x0d, 0xb7 },
{ 0x0e, 0x01 },
{ 0x4c, 0x00 },
{ 0x4a, 0x81 },
{ 0x21, 0x99 },
{ AEW, 0x40 },
{ AEB, 0x38 },
{ VV, VV_HIGH_TH_SET(0x08) | VV_LOW_TH_SET(0x02) },
{ 0x5c, 0x00 },
{ 0x63, 0x00 },
{ FLL, 0x22 },
{ COM3, 0x38 | COM3_BAND_AUTO },
{ REG5D, 0x55 },
{ REG5E, 0x7d },
{ REG5F, 0x7d },
{ REG60, 0x55 },
{ HISTO_LOW, 0x70 },
{ HISTO_HIGH, 0x80 },
{ 0x7c, 0x05 },
{ 0x20, 0x80 },
{ 0x28, 0x30 },
{ 0x6c, 0x00 },
{ 0x6d, 0x80 },
{ 0x6e, 0x00 },
{ 0x70, 0x02 },
{ 0x71, 0x94 },
{ 0x73, 0xc1 },
{ 0x3d, 0x34 },
{ COM7, COM7_RES_UXGA | COM7_ZOOM_EN },
{ 0x5a, 0x57 },
{ BD50, 0xbb },
{ BD60, 0x9c },
{ BANK_SEL, BANK_SEL_DSP },
{ 0xe5, 0x7f },
{ MC_BIST, MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL },
{ 0x41, 0x24 },
{ RESET, RESET_JPEG | RESET_DVP },
{ 0x76, 0xff },
{ 0x33, 0xa0 },
{ 0x42, 0x20 },
{ 0x43, 0x18 },
{ 0x4c, 0x00 },
{ CTRL3, CTRL3_BPC_EN | CTRL3_WPC_EN | 0x10 },
{ 0x88, 0x3f },
{ 0xd7, 0x03 },
{ 0xd9, 0x10 },
{ R_DVP_SP , R_DVP_SP_AUTO_MODE | 0x2 },
{ 0xc8, 0x08 },
{ 0xc9, 0x80 },
{ BPADDR, 0x00 },
{ BPDATA, 0x00 },
{ BPADDR, 0x03 },
{ BPDATA, 0x48 },
{ BPDATA, 0x48 },
{ BPADDR, 0x08 },
{ BPDATA, 0x20 },
{ BPDATA, 0x10 },
{ BPDATA, 0x0e },
{ 0x90, 0x00 },
{ 0x91, 0x0e },
{ 0x91, 0x1a },
{ 0x91, 0x31 },
{ 0x91, 0x5a },
{ 0x91, 0x69 },
{ 0x91, 0x75 },
{ 0x91, 0x7e },
{ 0x91, 0x88 },
{ 0x91, 0x8f },
{ 0x91, 0x96 },
{ 0x91, 0xa3 },
{ 0x91, 0xaf },
{ 0x91, 0xc4 },
{ 0x91, 0xd7 },
{ 0x91, 0xe8 },
{ 0x91, 0x20 },
{ 0x92, 0x00 },
{ 0x93, 0x06 },
{ 0x93, 0xe3 },
{ 0x93, 0x03 },
{ 0x93, 0x03 },
{ 0x93, 0x00 },
{ 0x93, 0x02 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x93, 0x00 },
{ 0x96, 0x00 },
{ 0x97, 0x08 },
{ 0x97, 0x19 },
{ 0x97, 0x02 },
{ 0x97, 0x0c },
{ 0x97, 0x24 },
{ 0x97, 0x30 },
{ 0x97, 0x28 },
{ 0x97, 0x26 },
{ 0x97, 0x02 },
{ 0x97, 0x98 },
{ 0x97, 0x80 },
{ 0x97, 0x00 },
{ 0x97, 0x00 },
{ 0xa4, 0x00 },
{ 0xa8, 0x00 },
{ 0xc5, 0x11 },
{ 0xc6, 0x51 },
{ 0xbf, 0x80 },
{ 0xc7, 0x10 },
{ 0xb6, 0x66 },
{ 0xb8, 0xA5 },
{ 0xb7, 0x64 },
{ 0xb9, 0x7C },
{ 0xb3, 0xaf },
{ 0xb4, 0x97 },
{ 0xb5, 0xFF },
{ 0xb0, 0xC5 },
{ 0xb1, 0x94 },
{ 0xb2, 0x0f },
{ 0xc4, 0x5c },
{ 0xa6, 0x00 },
{ 0xa7, 0x20 },
{ 0xa7, 0xd8 },
{ 0xa7, 0x1b },
{ 0xa7, 0x31 },
{ 0xa7, 0x00 },
{ 0xa7, 0x18 },
{ 0xa7, 0x20 },
{ 0xa7, 0xd8 },
{ 0xa7, 0x19 },
{ 0xa7, 0x31 },
{ 0xa7, 0x00 },
{ 0xa7, 0x18 },
{ 0xa7, 0x20 },
{ 0xa7, 0xd8 },
{ 0xa7, 0x19 },
{ 0xa7, 0x31 },
{ 0xa7, 0x00 },
{ 0xa7, 0x18 },
{ 0x7f, 0x00 },
{ 0xe5, 0x1f },
{ 0xe1, 0x77 },
{ 0xdd, 0x7f },
{ CTRL0, CTRL0_YUV422 | CTRL0_YUV_EN | CTRL0_RGB_EN },
ENDMARKER,
};
/*
* Register settings for window size
* The preamble, setup the internal DSP to input an UXGA (1600x1200) image.
* Then the different zooming configurations will setup the output image size.
*/
static const struct regval_list ov2640_size_change_preamble_regs[] = {
{ BANK_SEL, BANK_SEL_DSP },
{ RESET, RESET_DVP },
{ HSIZE8, HSIZE8_SET(UXGA_WIDTH) },
{ VSIZE8, VSIZE8_SET(UXGA_HEIGHT) },
{ CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN |
CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN },
{ HSIZE, HSIZE_SET(UXGA_WIDTH) },
{ VSIZE, VSIZE_SET(UXGA_HEIGHT) },
{ XOFFL, XOFFL_SET(0) },
{ YOFFL, YOFFL_SET(0) },
{ VHYX, VHYX_HSIZE_SET(UXGA_WIDTH) | VHYX_VSIZE_SET(UXGA_HEIGHT) |
VHYX_XOFF_SET(0) | VHYX_YOFF_SET(0)},
{ TEST, TEST_HSIZE_SET(UXGA_WIDTH) },
ENDMARKER,
};
#define PER_SIZE_REG_SEQ(x, y, v_div, h_div, pclk_div) \
{ CTRLI, CTRLI_LP_DP | CTRLI_V_DIV_SET(v_div) | \
CTRLI_H_DIV_SET(h_div)}, \
{ ZMOW, ZMOW_OUTW_SET(x) }, \
{ ZMOH, ZMOH_OUTH_SET(y) }, \
{ ZMHH, ZMHH_OUTW_SET(x) | ZMHH_OUTH_SET(y) }, \
{ R_DVP_SP, pclk_div }, \
{ RESET, 0x00}
static const struct regval_list ov2640_qcif_regs[] = {
PER_SIZE_REG_SEQ(QCIF_WIDTH, QCIF_HEIGHT, 3, 3, 4),
ENDMARKER,
};
static const struct regval_list ov2640_qvga_regs[] = {
PER_SIZE_REG_SEQ(QVGA_WIDTH, QVGA_HEIGHT, 2, 2, 4),
ENDMARKER,
};
static const struct regval_list ov2640_cif_regs[] = {
PER_SIZE_REG_SEQ(CIF_WIDTH, CIF_HEIGHT, 2, 2, 8),
ENDMARKER,
};
static const struct regval_list ov2640_vga_regs[] = {
PER_SIZE_REG_SEQ(VGA_WIDTH, VGA_HEIGHT, 0, 0, 2),
ENDMARKER,
};
static const struct regval_list ov2640_svga_regs[] = {
PER_SIZE_REG_SEQ(SVGA_WIDTH, SVGA_HEIGHT, 1, 1, 2),
ENDMARKER,
};
static const struct regval_list ov2640_xga_regs[] = {
PER_SIZE_REG_SEQ(XGA_WIDTH, XGA_HEIGHT, 0, 0, 2),
{ CTRLI, 0x00},
ENDMARKER,
};
static const struct regval_list ov2640_sxga_regs[] = {
PER_SIZE_REG_SEQ(SXGA_WIDTH, SXGA_HEIGHT, 0, 0, 2),
{ CTRLI, 0x00},
{ R_DVP_SP, 2 | R_DVP_SP_AUTO_MODE },
ENDMARKER,
};
static const struct regval_list ov2640_uxga_regs[] = {
PER_SIZE_REG_SEQ(UXGA_WIDTH, UXGA_HEIGHT, 0, 0, 0),
{ CTRLI, 0x00},
{ R_DVP_SP, 0 | R_DVP_SP_AUTO_MODE },
ENDMARKER,
};
#define OV2640_SIZE(n, w, h, r) \
{.name = n, .width = w , .height = h, .regs = r }
static const struct ov2640_win_size ov2640_supported_win_sizes[] = {
OV2640_SIZE("QCIF", QCIF_WIDTH, QCIF_HEIGHT, ov2640_qcif_regs),
OV2640_SIZE("QVGA", QVGA_WIDTH, QVGA_HEIGHT, ov2640_qvga_regs),
OV2640_SIZE("CIF", CIF_WIDTH, CIF_HEIGHT, ov2640_cif_regs),
OV2640_SIZE("VGA", VGA_WIDTH, VGA_HEIGHT, ov2640_vga_regs),
OV2640_SIZE("SVGA", SVGA_WIDTH, SVGA_HEIGHT, ov2640_svga_regs),
OV2640_SIZE("XGA", XGA_WIDTH, XGA_HEIGHT, ov2640_xga_regs),
OV2640_SIZE("SXGA", SXGA_WIDTH, SXGA_HEIGHT, ov2640_sxga_regs),
OV2640_SIZE("UXGA", UXGA_WIDTH, UXGA_HEIGHT, ov2640_uxga_regs),
};
/*
* Register settings for pixel formats
*/
static const struct regval_list ov2640_format_change_preamble_regs[] = {
{ BANK_SEL, BANK_SEL_DSP },
{ R_BYPASS, R_BYPASS_USE_DSP },
ENDMARKER,
};
static const struct regval_list ov2640_yuyv_regs[] = {
{ IMAGE_MODE, IMAGE_MODE_YUV422 },
{ 0xd7, 0x03 },
{ 0x33, 0xa0 },
{ 0xe5, 0x1f },
{ 0xe1, 0x67 },
{ RESET, 0x00 },
{ R_BYPASS, R_BYPASS_USE_DSP },
ENDMARKER,
};
static const struct regval_list ov2640_uyvy_regs[] = {
{ IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_YUV422 },
{ 0xd7, 0x01 },
{ 0x33, 0xa0 },
{ 0xe1, 0x67 },
{ RESET, 0x00 },
{ R_BYPASS, R_BYPASS_USE_DSP },
ENDMARKER,
};
static const struct regval_list ov2640_rgb565_be_regs[] = {
{ IMAGE_MODE, IMAGE_MODE_RGB565 },
{ 0xd7, 0x03 },
{ RESET, 0x00 },
{ R_BYPASS, R_BYPASS_USE_DSP },
ENDMARKER,
};
static const struct regval_list ov2640_rgb565_le_regs[] = {
{ IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_RGB565 },
{ 0xd7, 0x03 },
{ RESET, 0x00 },
{ R_BYPASS, R_BYPASS_USE_DSP },
ENDMARKER,
};
static u32 ov2640_codes[] = {
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_RGB565_2X8_BE,
MEDIA_BUS_FMT_RGB565_2X8_LE,
};
/*
* General functions
*/
static struct ov2640_priv *to_ov2640(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct ov2640_priv,
subdev);
}
static int ov2640_write_array(struct i2c_client *client,
const struct regval_list *vals)
{
int ret;
while ((vals->reg_num != 0xff) || (vals->value != 0xff)) {
ret = i2c_smbus_write_byte_data(client,
vals->reg_num, vals->value);
dev_vdbg(&client->dev, "array: 0x%02x, 0x%02x",
vals->reg_num, vals->value);
if (ret < 0)
return ret;
vals++;
}
return 0;
}
static int ov2640_mask_set(struct i2c_client *client,
u8 reg, u8 mask, u8 set)
{
s32 val = i2c_smbus_read_byte_data(client, reg);
if (val < 0)
return val;
val &= ~mask;
val |= set & mask;
dev_vdbg(&client->dev, "masks: 0x%02x, 0x%02x", reg, val);
return i2c_smbus_write_byte_data(client, reg, val);
}
static int ov2640_reset(struct i2c_client *client)
{
int ret;
const struct regval_list reset_seq[] = {
{BANK_SEL, BANK_SEL_SENS},
{COM7, COM7_SRST},
ENDMARKER,
};
ret = ov2640_write_array(client, reset_seq);
if (ret)
goto err;
msleep(5);
err:
dev_dbg(&client->dev, "%s: (ret %d)", __func__, ret);
return ret;
}
/*
* soc_camera_ops functions
*/
static int ov2640_s_stream(struct v4l2_subdev *sd, int enable)
{
return 0;
}
static int ov2640_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd =
&container_of(ctrl->handler, struct ov2640_priv, hdl)->subdev;
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 val;
int ret;
ret = i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
if (ret < 0)
return ret;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
val = ctrl->val ? REG04_VFLIP_IMG : 0x00;
return ov2640_mask_set(client, REG04, REG04_VFLIP_IMG, val);
case V4L2_CID_HFLIP:
val = ctrl->val ? REG04_HFLIP_IMG : 0x00;
return ov2640_mask_set(client, REG04, REG04_HFLIP_IMG, val);
}
return -EINVAL;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov2640_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
reg->size = 1;
if (reg->reg > 0xff)
return -EINVAL;
ret = i2c_smbus_read_byte_data(client, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
return 0;
}
static int ov2640_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
}
#endif
static int ov2640_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
struct ov2640_priv *priv = to_ov2640(client);
return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
}
/* Select the nearest higher resolution for capture */
static const struct ov2640_win_size *ov2640_select_win(u32 *width, u32 *height)
{
int i, default_size = ARRAY_SIZE(ov2640_supported_win_sizes) - 1;
for (i = 0; i < ARRAY_SIZE(ov2640_supported_win_sizes); i++) {
if (ov2640_supported_win_sizes[i].width >= *width &&
ov2640_supported_win_sizes[i].height >= *height) {
*width = ov2640_supported_win_sizes[i].width;
*height = ov2640_supported_win_sizes[i].height;
return &ov2640_supported_win_sizes[i];
}
}
*width = ov2640_supported_win_sizes[default_size].width;
*height = ov2640_supported_win_sizes[default_size].height;
return &ov2640_supported_win_sizes[default_size];
}
static int ov2640_set_params(struct i2c_client *client, u32 *width, u32 *height,
u32 code)
{
struct ov2640_priv *priv = to_ov2640(client);
const struct regval_list *selected_cfmt_regs;
int ret;
/* select win */
priv->win = ov2640_select_win(width, height);
/* select format */
priv->cfmt_code = 0;
switch (code) {
case MEDIA_BUS_FMT_RGB565_2X8_BE:
dev_dbg(&client->dev, "%s: Selected cfmt RGB565 BE", __func__);
selected_cfmt_regs = ov2640_rgb565_be_regs;
break;
case MEDIA_BUS_FMT_RGB565_2X8_LE:
dev_dbg(&client->dev, "%s: Selected cfmt RGB565 LE", __func__);
selected_cfmt_regs = ov2640_rgb565_le_regs;
break;
case MEDIA_BUS_FMT_YUYV8_2X8:
dev_dbg(&client->dev, "%s: Selected cfmt YUYV (YUV422)", __func__);
selected_cfmt_regs = ov2640_yuyv_regs;
break;
default:
case MEDIA_BUS_FMT_UYVY8_2X8:
dev_dbg(&client->dev, "%s: Selected cfmt UYVY", __func__);
selected_cfmt_regs = ov2640_uyvy_regs;
}
/* reset hardware */
ov2640_reset(client);
/* initialize the sensor with default data */
dev_dbg(&client->dev, "%s: Init default", __func__);
ret = ov2640_write_array(client, ov2640_init_regs);
if (ret < 0)
goto err;
/* select preamble */
dev_dbg(&client->dev, "%s: Set size to %s", __func__, priv->win->name);
ret = ov2640_write_array(client, ov2640_size_change_preamble_regs);
if (ret < 0)
goto err;
/* set size win */
ret = ov2640_write_array(client, priv->win->regs);
if (ret < 0)
goto err;
/* cfmt preamble */
dev_dbg(&client->dev, "%s: Set cfmt", __func__);
ret = ov2640_write_array(client, ov2640_format_change_preamble_regs);
if (ret < 0)
goto err;
/* set cfmt */
ret = ov2640_write_array(client, selected_cfmt_regs);
if (ret < 0)
goto err;
priv->cfmt_code = code;
*width = priv->win->width;
*height = priv->win->height;
return 0;
err:
dev_err(&client->dev, "%s: Error %d", __func__, ret);
ov2640_reset(client);
priv->win = NULL;
return ret;
}
static int ov2640_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov2640_priv *priv = to_ov2640(client);
if (!priv->win) {
u32 width = SVGA_WIDTH, height = SVGA_HEIGHT;
priv->win = ov2640_select_win(&width, &height);
priv->cfmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
}
mf->width = priv->win->width;
mf->height = priv->win->height;
mf->code = priv->cfmt_code;
switch (mf->code) {
case MEDIA_BUS_FMT_RGB565_2X8_BE:
case MEDIA_BUS_FMT_RGB565_2X8_LE:
mf->colorspace = V4L2_COLORSPACE_SRGB;
break;
default:
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_UYVY8_2X8:
mf->colorspace = V4L2_COLORSPACE_JPEG;
}
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int ov2640_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
switch (mf->code) {
case MEDIA_BUS_FMT_RGB565_2X8_BE:
case MEDIA_BUS_FMT_RGB565_2X8_LE:
mf->colorspace = V4L2_COLORSPACE_SRGB;
break;
default:
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_UYVY8_2X8:
mf->colorspace = V4L2_COLORSPACE_JPEG;
}
ret = ov2640_set_params(client, &mf->width, &mf->height, mf->code);
return ret;
}
static int ov2640_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
/*
* select suitable win, but don't store it
*/
ov2640_select_win(&mf->width, &mf->height);
mf->field = V4L2_FIELD_NONE;
switch (mf->code) {
case MEDIA_BUS_FMT_RGB565_2X8_BE:
case MEDIA_BUS_FMT_RGB565_2X8_LE:
mf->colorspace = V4L2_COLORSPACE_SRGB;
break;
default:
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_UYVY8_2X8:
mf->colorspace = V4L2_COLORSPACE_JPEG;
}
return 0;
}
static int ov2640_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
u32 *code)
{
if (index >= ARRAY_SIZE(ov2640_codes))
return -EINVAL;
*code = ov2640_codes[index];
return 0;
}
static int ov2640_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
a->c.left = 0;
a->c.top = 0;
a->c.width = UXGA_WIDTH;
a->c.height = UXGA_HEIGHT;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int ov2640_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = UXGA_WIDTH;
a->bounds.height = UXGA_HEIGHT;
a->defrect = a->bounds;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int ov2640_video_probe(struct i2c_client *client)
{
struct ov2640_priv *priv = to_ov2640(client);
u8 pid, ver, midh, midl;
const char *devname;
int ret;
ret = ov2640_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
*/
i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
pid = i2c_smbus_read_byte_data(client, PID);
ver = i2c_smbus_read_byte_data(client, VER);
midh = i2c_smbus_read_byte_data(client, MIDH);
midl = i2c_smbus_read_byte_data(client, MIDL);
switch (VERSION(pid, ver)) {
case PID_OV2640:
devname = "ov2640";
break;
default:
dev_err(&client->dev,
"Product ID error %x:%x\n", pid, ver);
ret = -ENODEV;
goto done;
}
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:
ov2640_s_power(&priv->subdev, 0);
return ret;
}
static const struct v4l2_ctrl_ops ov2640_ctrl_ops = {
.s_ctrl = ov2640_s_ctrl,
};
static struct v4l2_subdev_core_ops ov2640_subdev_core_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov2640_g_register,
.s_register = ov2640_s_register,
#endif
.s_power = ov2640_s_power,
};
static int ov2640_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
V4L2_MBUS_DATA_ACTIVE_HIGH;
cfg->type = V4L2_MBUS_PARALLEL;
cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
return 0;
}
static struct v4l2_subdev_video_ops ov2640_subdev_video_ops = {
.s_stream = ov2640_s_stream,
.g_mbus_fmt = ov2640_g_fmt,
.s_mbus_fmt = ov2640_s_fmt,
.try_mbus_fmt = ov2640_try_fmt,
.cropcap = ov2640_cropcap,
.g_crop = ov2640_g_crop,
.enum_mbus_fmt = ov2640_enum_fmt,
.g_mbus_config = ov2640_g_mbus_config,
};
static struct v4l2_subdev_ops ov2640_subdev_ops = {
.core = &ov2640_subdev_core_ops,
.video = &ov2640_subdev_video_ops,
};
/* OF probe functions */
static int ov2640_hw_power(struct device *dev, int on)
{
struct i2c_client *client = to_i2c_client(dev);
struct ov2640_priv *priv = to_ov2640(client);
dev_dbg(&client->dev, "%s: %s the camera\n",
__func__, on ? "ENABLE" : "DISABLE");
if (priv->pwdn_gpio)
gpiod_direction_output(priv->pwdn_gpio, !on);
return 0;
}
static int ov2640_hw_reset(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ov2640_priv *priv = to_ov2640(client);
if (priv->resetb_gpio) {
/* Active the resetb pin to perform a reset pulse */
gpiod_direction_output(priv->resetb_gpio, 1);
usleep_range(3000, 5000);
gpiod_direction_output(priv->resetb_gpio, 0);
}
return 0;
}
static int ov2640_probe_dt(struct i2c_client *client,
struct ov2640_priv *priv)
{
/* Request the reset GPIO deasserted */
priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
GPIOD_OUT_LOW);
if (!priv->resetb_gpio)
dev_dbg(&client->dev, "resetb gpio is not assigned!\n");
else if (IS_ERR(priv->resetb_gpio))
return PTR_ERR(priv->resetb_gpio);
/* Request the power down GPIO asserted */
priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
GPIOD_OUT_HIGH);
if (!priv->pwdn_gpio)
dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
else if (IS_ERR(priv->pwdn_gpio))
return PTR_ERR(priv->pwdn_gpio);
/* Initialize the soc_camera_subdev_desc */
priv->ssdd_dt.power = ov2640_hw_power;
priv->ssdd_dt.reset = ov2640_hw_reset;
client->dev.platform_data = &priv->ssdd_dt;
return 0;
}
/*
* i2c_driver functions
*/
static int ov2640_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov2640_priv *priv;
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&adapter->dev,
"OV2640: I2C-Adapter doesn't support SMBUS\n");
return -EIO;
}
priv = devm_kzalloc(&client->dev, sizeof(struct ov2640_priv), GFP_KERNEL);
if (!priv) {
dev_err(&adapter->dev,
"Failed to allocate memory for private data!\n");
return -ENOMEM;
}
priv->clk = v4l2_clk_get(&client->dev, "xvclk");
if (IS_ERR(priv->clk))
return -EPROBE_DEFER;
if (!ssdd && !client->dev.of_node) {
dev_err(&client->dev, "Missing platform_data for driver\n");
ret = -EINVAL;
goto err_clk;
}
if (!ssdd) {
ret = ov2640_probe_dt(client, priv);
if (ret)
goto err_clk;
}
v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops);
v4l2_ctrl_handler_init(&priv->hdl, 2);
v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
priv->subdev.ctrl_handler = &priv->hdl;
if (priv->hdl.error) {
ret = priv->hdl.error;
goto err_clk;
}
ret = ov2640_video_probe(client);
if (ret < 0)
goto err_videoprobe;
ret = v4l2_async_register_subdev(&priv->subdev);
if (ret < 0)
goto err_videoprobe;
dev_info(&adapter->dev, "OV2640 Probed\n");
return 0;
err_videoprobe:
v4l2_ctrl_handler_free(&priv->hdl);
err_clk:
v4l2_clk_put(priv->clk);
return ret;
}
static int ov2640_remove(struct i2c_client *client)
{
struct ov2640_priv *priv = to_ov2640(client);
v4l2_async_unregister_subdev(&priv->subdev);
v4l2_clk_put(priv->clk);
v4l2_device_unregister_subdev(&priv->subdev);
v4l2_ctrl_handler_free(&priv->hdl);
return 0;
}
static const struct i2c_device_id ov2640_id[] = {
{ "ov2640", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov2640_id);
static const struct of_device_id ov2640_of_match[] = {
{.compatible = "ovti,ov2640", },
{},
};
MODULE_DEVICE_TABLE(of, ov2640_of_match);
static struct i2c_driver ov2640_i2c_driver = {
.driver = {
.name = "ov2640",
.of_match_table = of_match_ptr(ov2640_of_match),
},
.probe = ov2640_probe,
.remove = ov2640_remove,
.id_table = ov2640_id,
};
module_i2c_driver(ov2640_i2c_driver);
MODULE_DESCRIPTION("SoC Camera driver for Omni Vision 2640 sensor");
MODULE_AUTHOR("Alberto Panizzo");
MODULE_LICENSE("GPL v2");