/* OmniVision OV6630/OV6130 Camera Chip Support Code * * Copyright (c) 1999-2004 Mark McClelland <mark@alpha.dyndns.org> * http://alpha.dyndns.org/ov511/ * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. NO WARRANTY OF ANY KIND is expressed or implied. */#define DEBUG#include <linux/slab.h>#include "ovcamchip_priv.h"/* Registers */#define REG_GAIN		0x00	/* gain [5:0] */#define REG_BLUE		0x01	/* blue gain */#define REG_RED			0x02	/* red gain */#define REG_SAT			0x03	/* saturation [7:3] */#define REG_CNT			0x05	/* Y contrast [3:0] */#define REG_BRT			0x06	/* Y brightness */#define REG_SHARP		0x07	/* sharpness */#define REG_WB_BLUE		0x0C	/* WB blue ratio [5:0] */#define REG_WB_RED		0x0D	/* WB red ratio [5:0] */#define REG_EXP			0x10	/* exposure *//* Window parameters */#define HWSBASE 0x38#define HWEBASE 0x3A#define VWSBASE 0x05#define VWEBASE 0x06struct ov6x30 {	int auto_brt;	int auto_exp;	int backlight;	int bandfilt;	int mirror;};static struct ovcamchip_regvals regvals_init_6x30[] = {	{ 0x12, 0x80 }, /* reset */	{ 0x00, 0x1f }, /* Gain */	{ 0x01, 0x99 }, /* Blue gain */	{ 0x02, 0x7c }, /* Red gain */	{ 0x03, 0xc0 }, /* Saturation */	{ 0x05, 0x0a }, /* Contrast */	{ 0x06, 0x95 }, /* Brightness */	{ 0x07, 0x2d }, /* Sharpness */	{ 0x0c, 0x20 },	{ 0x0d, 0x20 },	{ 0x0e, 0x20 },	{ 0x0f, 0x05 },	{ 0x10, 0x9a }, /* "exposure check" */	{ 0x11, 0x00 }, /* Pixel clock = fastest */	{ 0x12, 0x24 }, /* Enable AGC and AWB */	{ 0x13, 0x21 },	{ 0x14, 0x80 },	{ 0x15, 0x01 },	{ 0x16, 0x03 },	{ 0x17, 0x38 },	{ 0x18, 0xea },	{ 0x19, 0x04 },	{ 0x1a, 0x93 },	{ 0x1b, 0x00 },	{ 0x1e, 0xc4 },	{ 0x1f, 0x04 },	{ 0x20, 0x20 },	{ 0x21, 0x10 },	{ 0x22, 0x88 },	{ 0x23, 0xc0 }, /* Crystal circuit power level */	{ 0x25, 0x9a }, /* Increase AEC black pixel ratio */	{ 0x26, 0xb2 }, /* BLC enable */	{ 0x27, 0xa2 },	{ 0x28, 0x00 },	{ 0x29, 0x00 },	{ 0x2a, 0x84 }, /* (keep) */	{ 0x2b, 0xa8 }, /* (keep) */	{ 0x2c, 0xa0 },	{ 0x2d, 0x95 },	/* Enable auto-brightness */	{ 0x2e, 0x88 },	{ 0x33, 0x26 },	{ 0x34, 0x03 },	{ 0x36, 0x8f },	{ 0x37, 0x80 },	{ 0x38, 0x83 },	{ 0x39, 0x80 },	{ 0x3a, 0x0f },	{ 0x3b, 0x3c },	{ 0x3c, 0x1a },	{ 0x3d, 0x80 },	{ 0x3e, 0x80 },	{ 0x3f, 0x0e },	{ 0x40, 0x00 }, /* White bal */	{ 0x41, 0x00 }, /* White bal */	{ 0x42, 0x80 },	{ 0x43, 0x3f }, /* White bal */	{ 0x44, 0x80 },	{ 0x45, 0x20 },	{ 0x46, 0x20 },	{ 0x47, 0x80 },	{ 0x48, 0x7f },	{ 0x49, 0x00 },	{ 0x4a, 0x00 },	{ 0x4b, 0x80 },	{ 0x4c, 0xd0 },	{ 0x4d, 0x10 }, /* U = 0.563u, V = 0.714v */	{ 0x4e, 0x40 },	{ 0x4f, 0x07 }, /* UV average mode, color killer: strongest */	{ 0x50, 0xff },	{ 0x54, 0x23 }, /* Max AGC gain: 18dB */	{ 0x55, 0xff },	{ 0x56, 0x12 },	{ 0x57, 0x81 }, /* (default) */	{ 0x58, 0x75 },	{ 0x59, 0x01 }, /* AGC dark current compensation: +1 */	{ 0x5a, 0x2c },	{ 0x5b, 0x0f }, /* AWB chrominance levels */	{ 0x5c, 0x10 },	{ 0x3d, 0x80 },	{ 0x27, 0xa6 },	/* Toggle AWB off and on */	{ 0x12, 0x20 },	{ 0x12, 0x24 },	{ 0xff, 0xff },	/* END MARKER */};/* This initializes the OV6x30 camera chip and relevant variables. */static int ov6x30_init(struct i2c_client *c){	struct ovcamchip *ov = i2c_get_clientdata(c);	struct ov6x30 *s;	int rc;	DDEBUG(4, &c->dev, "entered");	rc = ov_write_regvals(c, regvals_init_6x30);	if (rc < 0)		return rc;	ov->spriv = s = kmalloc(sizeof *s, GFP_KERNEL);	if (!s)		return -ENOMEM;	memset(s, 0, sizeof *s);	s->auto_brt = 1;	s->auto_exp = 1;	return rc;}static int ov6x30_free(struct i2c_client *c){	struct ovcamchip *ov = i2c_get_clientdata(c);	kfree(ov->spriv);	return 0;}static int ov6x30_set_control(struct i2c_client *c,			      struct ovcamchip_control *ctl){	struct ovcamchip *ov = i2c_get_clientdata(c);	struct ov6x30 *s = ov->spriv;	int rc;	int v = ctl->value;	switch (ctl->id) {	case OVCAMCHIP_CID_CONT:		rc = ov_write_mask(c, REG_CNT, v >> 12, 0x0f);		break;	case OVCAMCHIP_CID_BRIGHT:		rc = ov_write(c, REG_BRT, v >> 8);		break;	case OVCAMCHIP_CID_SAT:		rc = ov_write(c, REG_SAT, v >> 8);		break;	case OVCAMCHIP_CID_HUE:		rc = ov_write(c, REG_RED, 0xFF - (v >> 8));		if (rc < 0)			goto out;		rc = ov_write(c, REG_BLUE, v >> 8);		break;	case OVCAMCHIP_CID_EXP:		rc = ov_write(c, REG_EXP, v);		break;	case OVCAMCHIP_CID_FREQ:	{		int sixty = (v == 60);		rc = ov_write(c, 0x2b, sixty?0xa8:0x28);		if (rc < 0)			goto out;		rc = ov_write(c, 0x2a, sixty?0x84:0xa4);		break;	}	case OVCAMCHIP_CID_BANDFILT:		rc = ov_write_mask(c, 0x2d, v?0x04:0x00, 0x04);		s->bandfilt = v;		break;	case OVCAMCHIP_CID_AUTOBRIGHT:		rc = ov_write_mask(c, 0x2d, v?0x10:0x00, 0x10);		s->auto_brt = v;		break;	case OVCAMCHIP_CID_AUTOEXP:		rc = ov_write_mask(c, 0x28, v?0x00:0x10, 0x10);		s->auto_exp = v;		break;	case OVCAMCHIP_CID_BACKLIGHT:	{		rc = ov_write_mask(c, 0x4e, v?0x80:0x60, 0xe0);		if (rc < 0)			goto out;		rc = ov_write_mask(c, 0x29, v?0x08:0x00, 0x08);		if (rc < 0)			goto out;		rc = ov_write_mask(c, 0x28, v?0x02:0x00, 0x02);		s->backlight = v;		break;	}	case OVCAMCHIP_CID_MIRROR:		rc = ov_write_mask(c, 0x12, v?0x40:0x00, 0x40);		s->mirror = v;		break;	default:		DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);		return -EPERM;	}out:	DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, v, rc);	return rc;}static int ov6x30_get_control(struct i2c_client *c,			      struct ovcamchip_control *ctl){	struct ovcamchip *ov = i2c_get_clientdata(c);	struct ov6x30 *s = ov->spriv;	int rc = 0;	unsigned char val = 0;	switch (ctl->id) {	case OVCAMCHIP_CID_CONT:		rc = ov_read(c, REG_CNT, &val);		ctl->value = (val & 0x0f) << 12;		break;	case OVCAMCHIP_CID_BRIGHT:		rc = ov_read(c, REG_BRT, &val);		ctl->value = val << 8;		break;	case OVCAMCHIP_CID_SAT:		rc = ov_read(c, REG_SAT, &val);		ctl->value = val << 8;		break;	case OVCAMCHIP_CID_HUE:		rc = ov_read(c, REG_BLUE, &val);		ctl->value = val << 8;		break;	case OVCAMCHIP_CID_EXP:		rc = ov_read(c, REG_EXP, &val);		ctl->value = val;		break;	case OVCAMCHIP_CID_BANDFILT:		ctl->value = s->bandfilt;		break;	case OVCAMCHIP_CID_AUTOBRIGHT:		ctl->value = s->auto_brt;		break;	case OVCAMCHIP_CID_AUTOEXP:		ctl->value = s->auto_exp;		break;	case OVCAMCHIP_CID_BACKLIGHT:		ctl->value = s->backlight;		break;	case OVCAMCHIP_CID_MIRROR:		ctl->value = s->mirror;		break;	default:		DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);		return -EPERM;	}	DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, ctl->value, rc);	return rc;}static int ov6x30_mode_init(struct i2c_client *c, struct ovcamchip_window *win){	/******** QCIF-specific regs ********/	ov_write_mask(c, 0x14, win->quarter?0x20:0x00, 0x20);	/******** Palette-specific regs ********/	if (win->format == VIDEO_PALETTE_GREY) {		if (c->adapter->id == (I2C_ALGO_SMBUS | I2C_HW_SMBUS_OV518)) {			/* Do nothing - we're already in 8-bit mode */		} else {			ov_write_mask(c, 0x13, 0x20, 0x20);		}	} else {		/* The OV518 needs special treatment. Although both the OV518		 * and the OV6630 support a 16-bit video bus, only the 8 bit Y		 * bus is actually used. The UV bus is tied to ground.		 * Therefore, the OV6630 needs to be in 8-bit multiplexed		 * output mode */		if (c->adapter->id == (I2C_ALGO_SMBUS | I2C_HW_SMBUS_OV518)) {			/* Do nothing - we want to stay in 8-bit mode */			/* Warning: Messing with reg 0x13 breaks OV518 color */		} else {			ov_write_mask(c, 0x13, 0x00, 0x20);		}	}	/******** Clock programming ********/	ov_write(c, 0x11, win->clockdiv);	return 0;}static int ov6x30_set_window(struct i2c_client *c, struct ovcamchip_window *win){	int ret, hwscale, vwscale;	ret = ov6x30_mode_init(c, win);	if (ret < 0)		return ret;	if (win->quarter) {		hwscale = 0;		vwscale = 0;	} else {		hwscale = 1;		vwscale = 1;	/* The datasheet says 0; it's wrong */	}	ov_write(c, 0x17, HWSBASE + (win->x >> hwscale));	ov_write(c, 0x18, HWEBASE + ((win->x + win->width) >> hwscale));	ov_write(c, 0x19, VWSBASE + (win->y >> vwscale));	ov_write(c, 0x1a, VWEBASE + ((win->y + win->height) >> vwscale));	return 0;}static int ov6x30_command(struct i2c_client *c, unsigned int cmd, void *arg){	switch (cmd) {	case OVCAMCHIP_CMD_S_CTRL:		return ov6x30_set_control(c, arg);	case OVCAMCHIP_CMD_G_CTRL:		return ov6x30_get_control(c, arg);	case OVCAMCHIP_CMD_S_MODE:		return ov6x30_set_window(c, arg);	default:		DDEBUG(2, &c->dev, "command not supported: %d", cmd);		return -ENOIOCTLCMD;	}}struct ovcamchip_ops ov6x30_ops = {	.init    =	ov6x30_init,	.free    =	ov6x30_free,	.command =	ov6x30_command,};