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linux/drivers/media/video/ovcamchip/ov6x20.c
Jean Delvare c7a46533ff [PATCH] I2C: Kill i2c_algorithm.id (5/7) 
Merge the algorithm id part (16 upper bits) of the i2c adapters ids
into the definition of the adapters ids directly. After that, we don't
need to OR both ids together for each i2c_adapter structure.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-05 09:14:31 -07:00

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/* OmniVision OV6620/OV6120 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 */
#define REG_CNT 0x05 /* Y contrast */
#define REG_BRT 0x06 /* Y brightness */
#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 0x06
struct ov6x20 {
int auto_brt;
int auto_exp;
int backlight;
int bandfilt;
int mirror;
};
/* Initial values for use with OV511/OV511+ cameras */
static struct ovcamchip_regvals regvals_init_6x20_511[] = {
{ 0x12, 0x80 }, /* reset */
{ 0x11, 0x01 },
{ 0x03, 0x60 },
{ 0x05, 0x7f }, /* For when autoadjust is off */
{ 0x07, 0xa8 },
{ 0x0c, 0x24 },
{ 0x0d, 0x24 },
{ 0x0f, 0x15 }, /* COMS */
{ 0x10, 0x75 }, /* AEC Exposure time */
{ 0x12, 0x24 }, /* Enable AGC and AWB */
{ 0x14, 0x04 },
{ 0x16, 0x03 },
{ 0x26, 0xb2 }, /* BLC enable */
/* 0x28: 0x05 Selects RGB format if RGB on */
{ 0x28, 0x05 },
{ 0x2a, 0x04 }, /* Disable framerate adjust */
{ 0x2d, 0x99 },
{ 0x33, 0xa0 }, /* Color Processing Parameter */
{ 0x34, 0xd2 }, /* Max A/D range */
{ 0x38, 0x8b },
{ 0x39, 0x40 },
{ 0x3c, 0x39 }, /* Enable AEC mode changing */
{ 0x3c, 0x3c }, /* Change AEC mode */
{ 0x3c, 0x24 }, /* Disable AEC mode changing */
{ 0x3d, 0x80 },
/* These next two registers (0x4a, 0x4b) are undocumented. They
* control the color balance */
{ 0x4a, 0x80 },
{ 0x4b, 0x80 },
{ 0x4d, 0xd2 }, /* This reduces noise a bit */
{ 0x4e, 0xc1 },
{ 0x4f, 0x04 },
{ 0xff, 0xff }, /* END MARKER */
};
/* Initial values for use with OV518 cameras */
static struct ovcamchip_regvals regvals_init_6x20_518[] = {
{ 0x12, 0x80 }, /* Do a reset */
{ 0x03, 0xc0 }, /* Saturation */
{ 0x05, 0x8a }, /* Contrast */
{ 0x0c, 0x24 }, /* AWB blue */
{ 0x0d, 0x24 }, /* AWB red */
{ 0x0e, 0x8d }, /* Additional 2x gain */
{ 0x0f, 0x25 }, /* Black expanding level = 1.3V */
{ 0x11, 0x01 }, /* Clock div. */
{ 0x12, 0x24 }, /* Enable AGC and AWB */
{ 0x13, 0x01 }, /* (default) */
{ 0x14, 0x80 }, /* Set reserved bit 7 */
{ 0x15, 0x01 }, /* (default) */
{ 0x16, 0x03 }, /* (default) */
{ 0x17, 0x38 }, /* (default) */
{ 0x18, 0xea }, /* (default) */
{ 0x19, 0x04 },
{ 0x1a, 0x93 },
{ 0x1b, 0x00 }, /* (default) */
{ 0x1e, 0xc4 }, /* (default) */
{ 0x1f, 0x04 }, /* (default) */
{ 0x20, 0x20 }, /* Enable 1st stage aperture correction */
{ 0x21, 0x10 }, /* Y offset */
{ 0x22, 0x88 }, /* U offset */
{ 0x23, 0xc0 }, /* Set XTAL power level */
{ 0x24, 0x53 }, /* AEC bright ratio */
{ 0x25, 0x7a }, /* AEC black ratio */
{ 0x26, 0xb2 }, /* BLC enable */
{ 0x27, 0xa2 }, /* Full output range */
{ 0x28, 0x01 }, /* (default) */
{ 0x29, 0x00 }, /* (default) */
{ 0x2a, 0x84 }, /* (default) */
{ 0x2b, 0xa8 }, /* Set custom frame rate */
{ 0x2c, 0xa0 }, /* (reserved) */
{ 0x2d, 0x95 }, /* Enable banding filter */
{ 0x2e, 0x88 }, /* V offset */
{ 0x33, 0x22 }, /* Luminance gamma on */
{ 0x34, 0xc7 }, /* A/D bias */
{ 0x36, 0x12 }, /* (reserved) */
{ 0x37, 0x63 }, /* (reserved) */
{ 0x38, 0x8b }, /* Quick AEC/AEB */
{ 0x39, 0x00 }, /* (default) */
{ 0x3a, 0x0f }, /* (default) */
{ 0x3b, 0x3c }, /* (default) */
{ 0x3c, 0x5c }, /* AEC controls */
{ 0x3d, 0x80 }, /* Drop 1 (bad) frame when AEC change */
{ 0x3e, 0x80 }, /* (default) */
{ 0x3f, 0x02 }, /* (default) */
{ 0x40, 0x10 }, /* (reserved) */
{ 0x41, 0x10 }, /* (reserved) */
{ 0x42, 0x00 }, /* (reserved) */
{ 0x43, 0x7f }, /* (reserved) */
{ 0x44, 0x80 }, /* (reserved) */
{ 0x45, 0x1c }, /* (reserved) */
{ 0x46, 0x1c }, /* (reserved) */
{ 0x47, 0x80 }, /* (reserved) */
{ 0x48, 0x5f }, /* (reserved) */
{ 0x49, 0x00 }, /* (reserved) */
{ 0x4a, 0x00 }, /* Color balance (undocumented) */
{ 0x4b, 0x80 }, /* Color balance (undocumented) */
{ 0x4c, 0x58 }, /* (reserved) */
{ 0x4d, 0xd2 }, /* U *= .938, V *= .838 */
{ 0x4e, 0xa0 }, /* (default) */
{ 0x4f, 0x04 }, /* UV 3-point average */
{ 0x50, 0xff }, /* (reserved) */
{ 0x51, 0x58 }, /* (reserved) */
{ 0x52, 0xc0 }, /* (reserved) */
{ 0x53, 0x42 }, /* (reserved) */
{ 0x27, 0xa6 }, /* Enable manual offset adj. (reg 21 & 22) */
{ 0x12, 0x20 },
{ 0x12, 0x24 },
{ 0xff, 0xff }, /* END MARKER */
};
/* This initializes the OV6x20 camera chip and relevant variables. */
static int ov6x20_init(struct i2c_client *c)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov6x20 *s;
int rc;
DDEBUG(4, &c->dev, "entered");
switch (c->adapter->id) {
case I2C_HW_SMBUS_OV511:
rc = ov_write_regvals(c, regvals_init_6x20_511);
break;
case I2C_HW_SMBUS_OV518:
rc = ov_write_regvals(c, regvals_init_6x20_518);
break;
default:
dev_err(&c->dev, "ov6x20: Unsupported adapter\n");
rc = -ENODEV;
}
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 ov6x20_free(struct i2c_client *c)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
kfree(ov->spriv);
return 0;
}
static int ov6x20_set_control(struct i2c_client *c,
struct ovcamchip_control *ctl)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov6x20 *s = ov->spriv;
int rc;
int v = ctl->value;
switch (ctl->id) {
case OVCAMCHIP_CID_CONT:
rc = ov_write(c, REG_CNT, v >> 8);
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, 0x13, v?0x01:0x00, 0x01);
s->auto_exp = v;
break;
case OVCAMCHIP_CID_BACKLIGHT:
{
rc = ov_write_mask(c, 0x4e, v?0xe0:0xc0, 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, 0x0e, v?0x80:0x00, 0x80);
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 ov6x20_get_control(struct i2c_client *c,
struct ovcamchip_control *ctl)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov6x20 *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 << 8;
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 ov6x20_mode_init(struct i2c_client *c, struct ovcamchip_window *win)
{
/******** QCIF-specific regs ********/
ov_write(c, 0x14, win->quarter?0x24:0x04);
/******** Palette-specific regs ********/
/* OV518 needs 8 bit multiplexed in color mode, and 16 bit in B&W */
if (c->adapter->id == I2C_HW_SMBUS_OV518) {
if (win->format == VIDEO_PALETTE_GREY)
ov_write_mask(c, 0x13, 0x00, 0x20);
else
ov_write_mask(c, 0x13, 0x20, 0x20);
} else {
if (win->format == VIDEO_PALETTE_GREY)
ov_write_mask(c, 0x13, 0x20, 0x20);
else
ov_write_mask(c, 0x13, 0x00, 0x20);
}
/******** Clock programming ********/
/* The OV6620 needs special handling. This prevents the
* severe banding that normally occurs */
/* Clock down */
ov_write(c, 0x2a, 0x04);
ov_write(c, 0x11, win->clockdiv);
ov_write(c, 0x2a, 0x84);
/* This next setting is critical. It seems to improve
* the gain or the contrast. The "reserved" bits seem
* to have some effect in this case. */
ov_write(c, 0x2d, 0x85); /* FIXME: This messes up banding filter */
return 0;
}
static int ov6x20_set_window(struct i2c_client *c, struct ovcamchip_window *win)
{
int ret, hwscale, vwscale;
ret = ov6x20_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 ov6x20_command(struct i2c_client *c, unsigned int cmd, void *arg)
{
switch (cmd) {
case OVCAMCHIP_CMD_S_CTRL:
return ov6x20_set_control(c, arg);
case OVCAMCHIP_CMD_G_CTRL:
return ov6x20_get_control(c, arg);
case OVCAMCHIP_CMD_S_MODE:
return ov6x20_set_window(c, arg);
default:
DDEBUG(2, &c->dev, "command not supported: %d", cmd);
return -ENOIOCTLCMD;
}
}
struct ovcamchip_ops ov6x20_ops = {
.init = ov6x20_init,
.free = ov6x20_free,
.command = ov6x20_command,
};
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