mirror of https://gitee.com/openkylin/linux.git
1222 lines
29 KiB
C
1222 lines
29 KiB
C
/*
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* V4L2 SoC Camera driver for OmniVision OV6650 Camera Sensor
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*
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* Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
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*
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* Based on OmniVision OV96xx Camera Driver
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* Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
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*
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* Based on ov772x camera driver:
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* Copyright (C) 2008 Renesas Solutions Corp.
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* Kuninori Morimoto <morimoto.kuninori@renesas.com>
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*
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* Based on ov7670 and soc_camera_platform driver,
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* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
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* Copyright (C) 2008 Magnus Damm
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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*
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* Hardware specific bits initialy based on former work by Matt Callow
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* drivers/media/video/omap/sensor_ov6650.c
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* Copyright (C) 2006 Matt Callow
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-chip-ident.h>
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/* Register definitions */
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#define REG_GAIN 0x00 /* range 00 - 3F */
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#define REG_BLUE 0x01
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#define REG_RED 0x02
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#define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
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#define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
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#define REG_BRT 0x06
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#define REG_PIDH 0x0a
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#define REG_PIDL 0x0b
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#define REG_AECH 0x10
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#define REG_CLKRC 0x11 /* Data Format and Internal Clock */
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/* [7:6] Input system clock (MHz)*/
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/* 00=8, 01=12, 10=16, 11=24 */
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/* [5:0]: Internal Clock Pre-Scaler */
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#define REG_COMA 0x12 /* [7] Reset */
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#define REG_COMB 0x13
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#define REG_COMC 0x14
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#define REG_COMD 0x15
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#define REG_COML 0x16
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#define REG_HSTRT 0x17
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#define REG_HSTOP 0x18
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#define REG_VSTRT 0x19
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#define REG_VSTOP 0x1a
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#define REG_PSHFT 0x1b
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#define REG_MIDH 0x1c
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#define REG_MIDL 0x1d
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#define REG_HSYNS 0x1e
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#define REG_HSYNE 0x1f
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#define REG_COME 0x20
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#define REG_YOFF 0x21
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#define REG_UOFF 0x22
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#define REG_VOFF 0x23
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#define REG_AEW 0x24
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#define REG_AEB 0x25
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#define REG_COMF 0x26
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#define REG_COMG 0x27
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#define REG_COMH 0x28
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#define REG_COMI 0x29
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#define REG_FRARL 0x2b
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#define REG_COMJ 0x2c
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#define REG_COMK 0x2d
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#define REG_AVGY 0x2e
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#define REG_REF0 0x2f
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#define REG_REF1 0x30
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#define REG_REF2 0x31
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#define REG_FRAJH 0x32
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#define REG_FRAJL 0x33
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#define REG_FACT 0x34
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#define REG_L1AEC 0x35
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#define REG_AVGU 0x36
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#define REG_AVGV 0x37
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#define REG_SPCB 0x60
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#define REG_SPCC 0x61
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#define REG_GAM1 0x62
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#define REG_GAM2 0x63
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#define REG_GAM3 0x64
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#define REG_SPCD 0x65
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#define REG_SPCE 0x68
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#define REG_ADCL 0x69
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#define REG_RMCO 0x6c
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#define REG_GMCO 0x6d
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#define REG_BMCO 0x6e
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/* Register bits, values, etc. */
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#define OV6650_PIDH 0x66 /* high byte of product ID number */
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#define OV6650_PIDL 0x50 /* low byte of product ID number */
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#define OV6650_MIDH 0x7F /* high byte of mfg ID */
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#define OV6650_MIDL 0xA2 /* low byte of mfg ID */
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#define DEF_GAIN 0x00
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#define DEF_BLUE 0x80
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#define DEF_RED 0x80
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#define SAT_SHIFT 4
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#define SAT_MASK (0xf << SAT_SHIFT)
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#define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
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#define HUE_EN BIT(5)
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#define HUE_MASK 0x1f
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#define DEF_HUE 0x10
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#define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
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#define DEF_AECH 0x4D
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#define CLKRC_6MHz 0x00
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#define CLKRC_12MHz 0x40
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#define CLKRC_16MHz 0x80
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#define CLKRC_24MHz 0xc0
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#define CLKRC_DIV_MASK 0x3f
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#define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
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#define COMA_RESET BIT(7)
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#define COMA_QCIF BIT(5)
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#define COMA_RAW_RGB BIT(4)
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#define COMA_RGB BIT(3)
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#define COMA_BW BIT(2)
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#define COMA_WORD_SWAP BIT(1)
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#define COMA_BYTE_SWAP BIT(0)
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#define DEF_COMA 0x00
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#define COMB_FLIP_V BIT(7)
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#define COMB_FLIP_H BIT(5)
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#define COMB_BAND_FILTER BIT(4)
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#define COMB_AWB BIT(2)
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#define COMB_AGC BIT(1)
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#define COMB_AEC BIT(0)
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#define DEF_COMB 0x5f
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#define COML_ONE_CHANNEL BIT(7)
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#define DEF_HSTRT 0x24
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#define DEF_HSTOP 0xd4
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#define DEF_VSTRT 0x04
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#define DEF_VSTOP 0x94
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#define COMF_HREF_LOW BIT(4)
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#define COMJ_PCLK_RISING BIT(4)
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#define COMJ_VSYNC_HIGH BIT(0)
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/* supported resolutions */
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#define W_QCIF (DEF_HSTOP - DEF_HSTRT)
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#define W_CIF (W_QCIF << 1)
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#define H_QCIF (DEF_VSTOP - DEF_VSTRT)
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#define H_CIF (H_QCIF << 1)
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#define FRAME_RATE_MAX 30
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struct ov6650_reg {
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u8 reg;
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u8 val;
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};
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struct ov6650 {
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struct v4l2_subdev subdev;
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int gain;
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int blue;
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int red;
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int saturation;
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int hue;
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int brightness;
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int exposure;
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int gamma;
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int aec;
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bool vflip;
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bool hflip;
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bool awb;
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bool agc;
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bool half_scale; /* scale down output by 2 */
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struct v4l2_rect rect; /* sensor cropping window */
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unsigned long pclk_limit; /* from host */
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unsigned long pclk_max; /* from resolution and format */
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struct v4l2_fract tpf; /* as requested with s_parm */
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enum v4l2_mbus_pixelcode code;
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enum v4l2_colorspace colorspace;
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};
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static enum v4l2_mbus_pixelcode ov6650_codes[] = {
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V4L2_MBUS_FMT_YUYV8_2X8,
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V4L2_MBUS_FMT_UYVY8_2X8,
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V4L2_MBUS_FMT_YVYU8_2X8,
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V4L2_MBUS_FMT_VYUY8_2X8,
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V4L2_MBUS_FMT_SBGGR8_1X8,
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V4L2_MBUS_FMT_Y8_1X8,
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};
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static const struct v4l2_queryctrl ov6650_controls[] = {
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{
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.id = V4L2_CID_AUTOGAIN,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "AGC",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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},
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{
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gain",
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.minimum = 0,
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.maximum = 0x3f,
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.step = 1,
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.default_value = DEF_GAIN,
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},
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{
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.id = V4L2_CID_AUTO_WHITE_BALANCE,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "AWB",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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},
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{
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.id = V4L2_CID_BLUE_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Blue",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = DEF_BLUE,
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},
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{
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.id = V4L2_CID_RED_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Red",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = DEF_RED,
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},
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{
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.id = V4L2_CID_SATURATION,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Saturation",
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.minimum = 0,
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.maximum = 0xf,
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.step = 1,
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.default_value = 0x8,
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},
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{
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.id = V4L2_CID_HUE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Hue",
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.minimum = 0,
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.maximum = HUE_MASK,
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.step = 1,
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.default_value = DEF_HUE,
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},
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{
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.id = V4L2_CID_BRIGHTNESS,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Brightness",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = 0x80,
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},
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{
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.id = V4L2_CID_EXPOSURE_AUTO,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "AEC",
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.minimum = 0,
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.maximum = 3,
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.step = 1,
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.default_value = 0,
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},
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{
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Exposure",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = DEF_AECH,
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},
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{
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.id = V4L2_CID_GAMMA,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gamma",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = 0x12,
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},
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{
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.id = V4L2_CID_VFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Vertically",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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},
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{
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.id = V4L2_CID_HFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Horizontally",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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},
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};
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/* read a register */
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static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
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{
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int ret;
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u8 data = reg;
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struct i2c_msg msg = {
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.addr = client->addr,
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.flags = 0,
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.len = 1,
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.buf = &data,
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};
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ret = i2c_transfer(client->adapter, &msg, 1);
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if (ret < 0)
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goto err;
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msg.flags = I2C_M_RD;
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ret = i2c_transfer(client->adapter, &msg, 1);
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if (ret < 0)
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goto err;
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*val = data;
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return 0;
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err:
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dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
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return ret;
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}
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/* write a register */
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static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
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{
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int ret;
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unsigned char data[2] = { reg, val };
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struct i2c_msg msg = {
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.addr = client->addr,
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.flags = 0,
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.len = 2,
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.buf = data,
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};
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ret = i2c_transfer(client->adapter, &msg, 1);
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udelay(100);
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if (ret < 0) {
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dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
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return ret;
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}
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return 0;
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}
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/* Read a register, alter its bits, write it back */
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static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
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{
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u8 val;
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int ret;
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ret = ov6650_reg_read(client, reg, &val);
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if (ret) {
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dev_err(&client->dev,
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"[Read]-Modify-Write of register 0x%02x failed!\n",
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reg);
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return ret;
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}
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val &= ~mask;
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val |= set;
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ret = ov6650_reg_write(client, reg, val);
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if (ret)
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dev_err(&client->dev,
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"Read-Modify-[Write] of register 0x%02x failed!\n",
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reg);
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return ret;
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}
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static struct ov6650 *to_ov6650(const struct i2c_client *client)
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{
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return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
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}
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/* Start/Stop streaming from the device */
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static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
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{
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return 0;
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}
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/* Alter bus settings on camera side */
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static int ov6650_set_bus_param(struct soc_camera_device *icd,
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unsigned long flags)
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{
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struct soc_camera_link *icl = to_soc_camera_link(icd);
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struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
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int ret;
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flags = soc_camera_apply_sensor_flags(icl, flags);
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if (flags & SOCAM_PCLK_SAMPLE_RISING)
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ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
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else
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ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
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if (ret)
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return ret;
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if (flags & SOCAM_HSYNC_ACTIVE_LOW)
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ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
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else
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ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
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if (ret)
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return ret;
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if (flags & SOCAM_VSYNC_ACTIVE_HIGH)
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ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
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else
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ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
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return ret;
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}
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/* Request bus settings on camera side */
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static unsigned long ov6650_query_bus_param(struct soc_camera_device *icd)
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{
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struct soc_camera_link *icl = to_soc_camera_link(icd);
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unsigned long flags = SOCAM_MASTER |
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SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
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SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
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SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
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SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8;
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return soc_camera_apply_sensor_flags(icl, flags);
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}
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/* Get status of additional camera capabilities */
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static int ov6650_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov6650 *priv = to_ov6650(client);
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uint8_t reg;
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int ret = 0;
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switch (ctrl->id) {
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case V4L2_CID_AUTOGAIN:
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ctrl->value = priv->agc;
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break;
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case V4L2_CID_GAIN:
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if (priv->agc) {
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ret = ov6650_reg_read(client, REG_GAIN, ®);
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ctrl->value = reg;
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} else {
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ctrl->value = priv->gain;
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}
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break;
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case V4L2_CID_AUTO_WHITE_BALANCE:
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ctrl->value = priv->awb;
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break;
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case V4L2_CID_BLUE_BALANCE:
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if (priv->awb) {
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ret = ov6650_reg_read(client, REG_BLUE, ®);
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ctrl->value = reg;
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} else {
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ctrl->value = priv->blue;
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}
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break;
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case V4L2_CID_RED_BALANCE:
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if (priv->awb) {
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ret = ov6650_reg_read(client, REG_RED, ®);
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ctrl->value = reg;
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} else {
|
|
ctrl->value = priv->red;
|
|
}
|
|
break;
|
|
case V4L2_CID_SATURATION:
|
|
ctrl->value = priv->saturation;
|
|
break;
|
|
case V4L2_CID_HUE:
|
|
ctrl->value = priv->hue;
|
|
break;
|
|
case V4L2_CID_BRIGHTNESS:
|
|
ctrl->value = priv->brightness;
|
|
break;
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
ctrl->value = priv->aec;
|
|
break;
|
|
case V4L2_CID_EXPOSURE:
|
|
if (priv->aec) {
|
|
ret = ov6650_reg_read(client, REG_AECH, ®);
|
|
ctrl->value = reg;
|
|
} else {
|
|
ctrl->value = priv->exposure;
|
|
}
|
|
break;
|
|
case V4L2_CID_GAMMA:
|
|
ctrl->value = priv->gamma;
|
|
break;
|
|
case V4L2_CID_VFLIP:
|
|
ctrl->value = priv->vflip;
|
|
break;
|
|
case V4L2_CID_HFLIP:
|
|
ctrl->value = priv->hflip;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Set status of additional camera capabilities */
|
|
static int ov6650_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
int ret = 0;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUTOGAIN:
|
|
ret = ov6650_reg_rmw(client, REG_COMB,
|
|
ctrl->value ? COMB_AGC : 0, COMB_AGC);
|
|
if (!ret)
|
|
priv->agc = ctrl->value;
|
|
break;
|
|
case V4L2_CID_GAIN:
|
|
ret = ov6650_reg_write(client, REG_GAIN, ctrl->value);
|
|
if (!ret)
|
|
priv->gain = ctrl->value;
|
|
break;
|
|
case V4L2_CID_AUTO_WHITE_BALANCE:
|
|
ret = ov6650_reg_rmw(client, REG_COMB,
|
|
ctrl->value ? COMB_AWB : 0, COMB_AWB);
|
|
if (!ret)
|
|
priv->awb = ctrl->value;
|
|
break;
|
|
case V4L2_CID_BLUE_BALANCE:
|
|
ret = ov6650_reg_write(client, REG_BLUE, ctrl->value);
|
|
if (!ret)
|
|
priv->blue = ctrl->value;
|
|
break;
|
|
case V4L2_CID_RED_BALANCE:
|
|
ret = ov6650_reg_write(client, REG_RED, ctrl->value);
|
|
if (!ret)
|
|
priv->red = ctrl->value;
|
|
break;
|
|
case V4L2_CID_SATURATION:
|
|
ret = ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->value),
|
|
SAT_MASK);
|
|
if (!ret)
|
|
priv->saturation = ctrl->value;
|
|
break;
|
|
case V4L2_CID_HUE:
|
|
ret = ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->value),
|
|
HUE_MASK);
|
|
if (!ret)
|
|
priv->hue = ctrl->value;
|
|
break;
|
|
case V4L2_CID_BRIGHTNESS:
|
|
ret = ov6650_reg_write(client, REG_BRT, ctrl->value);
|
|
if (!ret)
|
|
priv->brightness = ctrl->value;
|
|
break;
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
switch (ctrl->value) {
|
|
case V4L2_EXPOSURE_AUTO:
|
|
ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0);
|
|
break;
|
|
default:
|
|
ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC);
|
|
break;
|
|
}
|
|
if (!ret)
|
|
priv->aec = ctrl->value;
|
|
break;
|
|
case V4L2_CID_EXPOSURE:
|
|
ret = ov6650_reg_write(client, REG_AECH, ctrl->value);
|
|
if (!ret)
|
|
priv->exposure = ctrl->value;
|
|
break;
|
|
case V4L2_CID_GAMMA:
|
|
ret = ov6650_reg_write(client, REG_GAM1, ctrl->value);
|
|
if (!ret)
|
|
priv->gamma = ctrl->value;
|
|
break;
|
|
case V4L2_CID_VFLIP:
|
|
ret = ov6650_reg_rmw(client, REG_COMB,
|
|
ctrl->value ? COMB_FLIP_V : 0, COMB_FLIP_V);
|
|
if (!ret)
|
|
priv->vflip = ctrl->value;
|
|
break;
|
|
case V4L2_CID_HFLIP:
|
|
ret = ov6650_reg_rmw(client, REG_COMB,
|
|
ctrl->value ? COMB_FLIP_H : 0, COMB_FLIP_H);
|
|
if (!ret)
|
|
priv->hflip = ctrl->value;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Get chip identification */
|
|
static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_chip_ident *id)
|
|
{
|
|
id->ident = V4L2_IDENT_OV6650;
|
|
id->revision = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
static int ov6650_get_register(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
int ret;
|
|
u8 val;
|
|
|
|
if (reg->reg & ~0xff)
|
|
return -EINVAL;
|
|
|
|
reg->size = 1;
|
|
|
|
ret = ov6650_reg_read(client, reg->reg, &val);
|
|
if (!ret)
|
|
reg->val = (__u64)val;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ov6650_set_register(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
if (reg->reg & ~0xff || reg->val & ~0xff)
|
|
return -EINVAL;
|
|
|
|
return ov6650_reg_write(client, reg->reg, reg->val);
|
|
}
|
|
#endif
|
|
|
|
static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
|
|
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
a->c = priv->rect;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
struct v4l2_rect *rect = &a->c;
|
|
int ret;
|
|
|
|
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
rect->left = ALIGN(rect->left, 2);
|
|
rect->width = ALIGN(rect->width, 2);
|
|
rect->top = ALIGN(rect->top, 2);
|
|
rect->height = ALIGN(rect->height, 2);
|
|
soc_camera_limit_side(&rect->left, &rect->width,
|
|
DEF_HSTRT << 1, 2, W_CIF);
|
|
soc_camera_limit_side(&rect->top, &rect->height,
|
|
DEF_VSTRT << 1, 2, H_CIF);
|
|
|
|
ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
|
|
if (!ret) {
|
|
priv->rect.left = rect->left;
|
|
ret = ov6650_reg_write(client, REG_HSTOP,
|
|
(rect->left + rect->width) >> 1);
|
|
}
|
|
if (!ret) {
|
|
priv->rect.width = rect->width;
|
|
ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
|
|
}
|
|
if (!ret) {
|
|
priv->rect.top = rect->top;
|
|
ret = ov6650_reg_write(client, REG_VSTOP,
|
|
(rect->top + rect->height) >> 1);
|
|
}
|
|
if (!ret)
|
|
priv->rect.height = rect->height;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
|
|
{
|
|
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
a->bounds.left = DEF_HSTRT << 1;
|
|
a->bounds.top = DEF_VSTRT << 1;
|
|
a->bounds.width = W_CIF;
|
|
a->bounds.height = H_CIF;
|
|
a->defrect = a->bounds;
|
|
a->pixelaspect.numerator = 1;
|
|
a->pixelaspect.denominator = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov6650_g_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
|
|
mf->width = priv->rect.width >> priv->half_scale;
|
|
mf->height = priv->rect.height >> priv->half_scale;
|
|
mf->code = priv->code;
|
|
mf->colorspace = priv->colorspace;
|
|
mf->field = V4L2_FIELD_NONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
|
|
{
|
|
return width > rect->width >> 1 || height > rect->height >> 1;
|
|
}
|
|
|
|
static u8 to_clkrc(struct v4l2_fract *timeperframe,
|
|
unsigned long pclk_limit, unsigned long pclk_max)
|
|
{
|
|
unsigned long pclk;
|
|
|
|
if (timeperframe->numerator && timeperframe->denominator)
|
|
pclk = pclk_max * timeperframe->denominator /
|
|
(FRAME_RATE_MAX * timeperframe->numerator);
|
|
else
|
|
pclk = pclk_max;
|
|
|
|
if (pclk_limit && pclk_limit < pclk)
|
|
pclk = pclk_limit;
|
|
|
|
return (pclk_max - 1) / pclk;
|
|
}
|
|
|
|
/* set the format we will capture in */
|
|
static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_device *icd = client->dev.platform_data;
|
|
struct soc_camera_sense *sense = icd->sense;
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
|
|
struct v4l2_crop a = {
|
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
.c = {
|
|
.left = priv->rect.left + (priv->rect.width >> 1) -
|
|
(mf->width >> (1 - half_scale)),
|
|
.top = priv->rect.top + (priv->rect.height >> 1) -
|
|
(mf->height >> (1 - half_scale)),
|
|
.width = mf->width << half_scale,
|
|
.height = mf->height << half_scale,
|
|
},
|
|
};
|
|
enum v4l2_mbus_pixelcode code = mf->code;
|
|
unsigned long mclk, pclk;
|
|
u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
|
|
int ret;
|
|
|
|
/* select color matrix configuration for given color encoding */
|
|
switch (code) {
|
|
case V4L2_MBUS_FMT_Y8_1X8:
|
|
dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
|
|
coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
|
|
coma_set |= COMA_BW;
|
|
break;
|
|
case V4L2_MBUS_FMT_YUYV8_2X8:
|
|
dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
|
|
coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
|
|
coma_set |= COMA_WORD_SWAP;
|
|
break;
|
|
case V4L2_MBUS_FMT_YVYU8_2X8:
|
|
dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
|
|
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
|
|
COMA_BYTE_SWAP;
|
|
break;
|
|
case V4L2_MBUS_FMT_UYVY8_2X8:
|
|
dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
|
|
if (half_scale) {
|
|
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
|
|
coma_set |= COMA_BYTE_SWAP;
|
|
} else {
|
|
coma_mask |= COMA_RGB | COMA_BW;
|
|
coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
|
|
}
|
|
break;
|
|
case V4L2_MBUS_FMT_VYUY8_2X8:
|
|
dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
|
|
if (half_scale) {
|
|
coma_mask |= COMA_RGB | COMA_BW;
|
|
coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
|
|
} else {
|
|
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
|
|
coma_set |= COMA_BYTE_SWAP;
|
|
}
|
|
break;
|
|
case V4L2_MBUS_FMT_SBGGR8_1X8:
|
|
dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
|
|
coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
|
|
coma_set |= COMA_RAW_RGB | COMA_RGB;
|
|
break;
|
|
default:
|
|
dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
|
|
return -EINVAL;
|
|
}
|
|
priv->code = code;
|
|
|
|
if (code == V4L2_MBUS_FMT_Y8_1X8 ||
|
|
code == V4L2_MBUS_FMT_SBGGR8_1X8) {
|
|
coml_mask = COML_ONE_CHANNEL;
|
|
coml_set = 0;
|
|
priv->pclk_max = 4000000;
|
|
} else {
|
|
coml_mask = 0;
|
|
coml_set = COML_ONE_CHANNEL;
|
|
priv->pclk_max = 8000000;
|
|
}
|
|
|
|
if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
|
|
priv->colorspace = V4L2_COLORSPACE_SRGB;
|
|
else if (code != 0)
|
|
priv->colorspace = V4L2_COLORSPACE_JPEG;
|
|
|
|
if (half_scale) {
|
|
dev_dbg(&client->dev, "max resolution: QCIF\n");
|
|
coma_set |= COMA_QCIF;
|
|
priv->pclk_max /= 2;
|
|
} else {
|
|
dev_dbg(&client->dev, "max resolution: CIF\n");
|
|
coma_mask |= COMA_QCIF;
|
|
}
|
|
priv->half_scale = half_scale;
|
|
|
|
if (sense) {
|
|
if (sense->master_clock == 8000000) {
|
|
dev_dbg(&client->dev, "8MHz input clock\n");
|
|
clkrc = CLKRC_6MHz;
|
|
} else if (sense->master_clock == 12000000) {
|
|
dev_dbg(&client->dev, "12MHz input clock\n");
|
|
clkrc = CLKRC_12MHz;
|
|
} else if (sense->master_clock == 16000000) {
|
|
dev_dbg(&client->dev, "16MHz input clock\n");
|
|
clkrc = CLKRC_16MHz;
|
|
} else if (sense->master_clock == 24000000) {
|
|
dev_dbg(&client->dev, "24MHz input clock\n");
|
|
clkrc = CLKRC_24MHz;
|
|
} else {
|
|
dev_err(&client->dev,
|
|
"unspported input clock, check platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
mclk = sense->master_clock;
|
|
priv->pclk_limit = sense->pixel_clock_max;
|
|
} else {
|
|
clkrc = CLKRC_24MHz;
|
|
mclk = 24000000;
|
|
priv->pclk_limit = 0;
|
|
dev_dbg(&client->dev, "using default 24MHz input clock\n");
|
|
}
|
|
|
|
clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
|
|
|
|
pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
|
|
dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
|
|
mclk / pclk, 10 * mclk % pclk / pclk);
|
|
|
|
ret = ov6650_s_crop(sd, &a);
|
|
if (!ret)
|
|
ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
|
|
if (!ret)
|
|
ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
|
|
if (!ret)
|
|
ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
|
|
|
|
if (!ret) {
|
|
mf->colorspace = priv->colorspace;
|
|
mf->width = priv->rect.width >> half_scale;
|
|
mf->height = priv->rect.height >> half_scale;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ov6650_try_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
|
|
if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
|
|
v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
|
|
&mf->height, 2, H_CIF, 1, 0);
|
|
|
|
mf->field = V4L2_FIELD_NONE;
|
|
|
|
switch (mf->code) {
|
|
case V4L2_MBUS_FMT_Y10_1X10:
|
|
mf->code = V4L2_MBUS_FMT_Y8_1X8;
|
|
case V4L2_MBUS_FMT_Y8_1X8:
|
|
case V4L2_MBUS_FMT_YVYU8_2X8:
|
|
case V4L2_MBUS_FMT_YUYV8_2X8:
|
|
case V4L2_MBUS_FMT_VYUY8_2X8:
|
|
case V4L2_MBUS_FMT_UYVY8_2X8:
|
|
mf->colorspace = V4L2_COLORSPACE_JPEG;
|
|
break;
|
|
default:
|
|
mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
|
|
case V4L2_MBUS_FMT_SBGGR8_1X8:
|
|
mf->colorspace = V4L2_COLORSPACE_SRGB;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
|
|
enum v4l2_mbus_pixelcode *code)
|
|
{
|
|
if (index >= ARRAY_SIZE(ov6650_codes))
|
|
return -EINVAL;
|
|
|
|
*code = ov6650_codes[index];
|
|
return 0;
|
|
}
|
|
|
|
static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
struct v4l2_captureparm *cp = &parms->parm.capture;
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|
|
|
if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
memset(cp, 0, sizeof(*cp));
|
|
cp->capability = V4L2_CAP_TIMEPERFRAME;
|
|
cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
|
|
priv->pclk_limit, priv->pclk_max));
|
|
cp->timeperframe.denominator = FRAME_RATE_MAX;
|
|
|
|
dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
|
|
cp->timeperframe.numerator, cp->timeperframe.denominator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
struct v4l2_captureparm *cp = &parms->parm.capture;
|
|
struct v4l2_fract *tpf = &cp->timeperframe;
|
|
int div, ret;
|
|
u8 clkrc;
|
|
|
|
if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
if (cp->extendedmode != 0)
|
|
return -EINVAL;
|
|
|
|
if (tpf->numerator == 0 || tpf->denominator == 0)
|
|
div = 1; /* Reset to full rate */
|
|
else
|
|
div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
|
|
|
|
if (div == 0)
|
|
div = 1;
|
|
else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
|
|
div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
|
|
|
|
/*
|
|
* Keep result to be used as tpf limit
|
|
* for subseqent clock divider calculations
|
|
*/
|
|
priv->tpf.numerator = div;
|
|
priv->tpf.denominator = FRAME_RATE_MAX;
|
|
|
|
clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
|
|
|
|
ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
|
|
if (!ret) {
|
|
tpf->numerator = GET_CLKRC_DIV(clkrc);
|
|
tpf->denominator = FRAME_RATE_MAX;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Soft reset the camera. This has nothing to do with the RESET pin! */
|
|
static int ov6650_reset(struct i2c_client *client)
|
|
{
|
|
int ret;
|
|
|
|
dev_dbg(&client->dev, "reset\n");
|
|
|
|
ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
|
|
if (ret)
|
|
dev_err(&client->dev,
|
|
"An error occurred while entering soft reset!\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* program default register values */
|
|
static int ov6650_prog_dflt(struct i2c_client *client)
|
|
{
|
|
int ret;
|
|
|
|
dev_dbg(&client->dev, "initializing\n");
|
|
|
|
ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
|
|
if (!ret)
|
|
ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ov6650_video_probe(struct soc_camera_device *icd,
|
|
struct i2c_client *client)
|
|
{
|
|
u8 pidh, pidl, midh, midl;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* check and show product ID and manufacturer ID
|
|
*/
|
|
ret = ov6650_reg_read(client, REG_PIDH, &pidh);
|
|
if (!ret)
|
|
ret = ov6650_reg_read(client, REG_PIDL, &pidl);
|
|
if (!ret)
|
|
ret = ov6650_reg_read(client, REG_MIDH, &midh);
|
|
if (!ret)
|
|
ret = ov6650_reg_read(client, REG_MIDL, &midl);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
|
|
dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
|
|
pidh, pidl);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(&client->dev,
|
|
"ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
|
|
pidh, pidl, midh, midl);
|
|
|
|
ret = ov6650_reset(client);
|
|
if (!ret)
|
|
ret = ov6650_prog_dflt(client);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct soc_camera_ops ov6650_ops = {
|
|
.set_bus_param = ov6650_set_bus_param,
|
|
.query_bus_param = ov6650_query_bus_param,
|
|
.controls = ov6650_controls,
|
|
.num_controls = ARRAY_SIZE(ov6650_controls),
|
|
};
|
|
|
|
static struct v4l2_subdev_core_ops ov6650_core_ops = {
|
|
.g_ctrl = ov6650_g_ctrl,
|
|
.s_ctrl = ov6650_s_ctrl,
|
|
.g_chip_ident = ov6650_g_chip_ident,
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.g_register = ov6650_get_register,
|
|
.s_register = ov6650_set_register,
|
|
#endif
|
|
};
|
|
|
|
static struct v4l2_subdev_video_ops ov6650_video_ops = {
|
|
.s_stream = ov6650_s_stream,
|
|
.g_mbus_fmt = ov6650_g_fmt,
|
|
.s_mbus_fmt = ov6650_s_fmt,
|
|
.try_mbus_fmt = ov6650_try_fmt,
|
|
.enum_mbus_fmt = ov6650_enum_fmt,
|
|
.cropcap = ov6650_cropcap,
|
|
.g_crop = ov6650_g_crop,
|
|
.s_crop = ov6650_s_crop,
|
|
.g_parm = ov6650_g_parm,
|
|
.s_parm = ov6650_s_parm,
|
|
};
|
|
|
|
static struct v4l2_subdev_ops ov6650_subdev_ops = {
|
|
.core = &ov6650_core_ops,
|
|
.video = &ov6650_video_ops,
|
|
};
|
|
|
|
/*
|
|
* i2c_driver function
|
|
*/
|
|
static int ov6650_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *did)
|
|
{
|
|
struct ov6650 *priv;
|
|
struct soc_camera_device *icd = client->dev.platform_data;
|
|
struct soc_camera_link *icl;
|
|
int ret;
|
|
|
|
if (!icd) {
|
|
dev_err(&client->dev, "Missing soc-camera data!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
icl = to_soc_camera_link(icd);
|
|
if (!icl) {
|
|
dev_err(&client->dev, "Missing platform_data for driver\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&client->dev,
|
|
"Failed to allocate memory for private data!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
|
|
|
|
icd->ops = &ov6650_ops;
|
|
|
|
priv->rect.left = DEF_HSTRT << 1;
|
|
priv->rect.top = DEF_VSTRT << 1;
|
|
priv->rect.width = W_CIF;
|
|
priv->rect.height = H_CIF;
|
|
priv->half_scale = false;
|
|
priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
|
|
priv->colorspace = V4L2_COLORSPACE_JPEG;
|
|
|
|
ret = ov6650_video_probe(icd, client);
|
|
|
|
if (ret) {
|
|
icd->ops = NULL;
|
|
kfree(priv);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ov6650_remove(struct i2c_client *client)
|
|
{
|
|
struct ov6650 *priv = to_ov6650(client);
|
|
|
|
kfree(priv);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id ov6650_id[] = {
|
|
{ "ov6650", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ov6650_id);
|
|
|
|
static struct i2c_driver ov6650_i2c_driver = {
|
|
.driver = {
|
|
.name = "ov6650",
|
|
},
|
|
.probe = ov6650_probe,
|
|
.remove = ov6650_remove,
|
|
.id_table = ov6650_id,
|
|
};
|
|
|
|
static int __init ov6650_module_init(void)
|
|
{
|
|
return i2c_add_driver(&ov6650_i2c_driver);
|
|
}
|
|
|
|
static void __exit ov6650_module_exit(void)
|
|
{
|
|
i2c_del_driver(&ov6650_i2c_driver);
|
|
}
|
|
|
|
module_init(ov6650_module_init);
|
|
module_exit(ov6650_module_exit);
|
|
|
|
MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
|
|
MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
|
|
MODULE_LICENSE("GPL v2");
|