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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 | /* OmniVision OV76BE 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"
/* OV7610 registers: Since the OV76BE is undocumented, we'll settle for these
* for now. */
#define REG_GAIN 0x00 /* gain [5:0] */
#define REG_BLUE 0x01 /* blue channel balance */
#define REG_RED 0x02 /* red channel balance */
#define REG_SAT 0x03 /* saturation */
#define REG_CNT 0x05 /* Y contrast */
#define REG_BRT 0x06 /* Y brightness */
#define REG_BLUE_BIAS 0x0C /* blue channel bias [5:0] */
#define REG_RED_BIAS 0x0D /* red channel bias [5:0] */
#define REG_GAMMA_COEFF 0x0E /* gamma settings */
#define REG_WB_RANGE 0x0F /* AEC/ALC/S-AWB settings */
#define REG_EXP 0x10 /* manual exposure setting */
#define REG_CLOCK 0x11 /* polarity/clock prescaler */
#define REG_FIELD_DIVIDE 0x16 /* field interval/mode settings */
#define REG_HWIN_START 0x17 /* horizontal window start */
#define REG_HWIN_END 0x18 /* horizontal window end */
#define REG_VWIN_START 0x19 /* vertical window start */
#define REG_VWIN_END 0x1A /* vertical window end */
#define REG_PIXEL_SHIFT 0x1B /* pixel shift */
#define REG_YOFFSET 0x21 /* Y channel offset */
#define REG_UOFFSET 0x22 /* U channel offset */
#define REG_ECW 0x24 /* exposure white level for AEC */
#define REG_ECB 0x25 /* exposure black level for AEC */
#define REG_FRAMERATE_H 0x2A /* frame rate MSB + misc */
#define REG_FRAMERATE_L 0x2B /* frame rate LSB */
#define REG_ALC 0x2C /* Auto Level Control settings */
#define REG_VOFFSET 0x2E /* V channel offset adjustment */
#define REG_ARRAY_BIAS 0x2F /* array bias -- don't change */
#define REG_YGAMMA 0x33 /* misc gamma settings [7:6] */
#define REG_BIAS_ADJUST 0x34 /* misc bias settings */
/* Window parameters */
#define HWSBASE 0x38
#define HWEBASE 0x3a
#define VWSBASE 0x05
#define VWEBASE 0x05
struct ov76be {
int auto_brt;
int auto_exp;
int bandfilt;
int mirror;
};
/* NOTE: These are the same as the 7x10 settings, but should eventually be
* optimized for the OV76BE */
static struct ovcamchip_regvals regvals_init_76be[] = {
{ 0x10, 0xff },
{ 0x16, 0x03 },
{ 0x28, 0x24 },
{ 0x2b, 0xac },
{ 0x12, 0x00 },
{ 0x38, 0x81 },
{ 0x28, 0x24 }, /* 0c */
{ 0x0f, 0x85 }, /* lg's setting */
{ 0x15, 0x01 },
{ 0x20, 0x1c },
{ 0x23, 0x2a },
{ 0x24, 0x10 },
{ 0x25, 0x8a },
{ 0x26, 0xa2 },
{ 0x27, 0xc2 },
{ 0x2a, 0x04 },
{ 0x2c, 0xfe },
{ 0x2d, 0x93 },
{ 0x30, 0x71 },
{ 0x31, 0x60 },
{ 0x32, 0x26 },
{ 0x33, 0x20 },
{ 0x34, 0x48 },
{ 0x12, 0x24 },
{ 0x11, 0x01 },
{ 0x0c, 0x24 },
{ 0x0d, 0x24 },
{ 0xff, 0xff }, /* END MARKER */
};
/* This initializes the OV76be camera chip and relevant variables. */
static int ov76be_init(struct i2c_client *c)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov76be *s;
int rc;
DDEBUG(4, &c->dev, "entered");
rc = ov_write_regvals(c, regvals_init_76be);
if (rc < 0)
return rc;
ov->spriv = s = kzalloc(sizeof *s, GFP_KERNEL);
if (!s)
return -ENOMEM;
s->auto_brt = 1;
s->auto_exp = 1;
return rc;
}
static int ov76be_free(struct i2c_client *c)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
kfree(ov->spriv);
return 0;
}
static int ov76be_set_control(struct i2c_client *c,
struct ovcamchip_control *ctl)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov76be *s = ov->spriv;
int rc;
int v = ctl->value;
switch (ctl->id) {
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_EXP:
rc = ov_write(c, REG_EXP, v);
break;
case OVCAMCHIP_CID_FREQ:
{
int sixty = (v == 60);
rc = ov_write_mask(c, 0x2a, sixty?0x00:0x80, 0x80);
if (rc < 0)
goto out;
rc = ov_write(c, 0x2b, sixty?0x00:0xac);
if (rc < 0)
goto out;
rc = ov_write_mask(c, 0x76, 0x01, 0x01);
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_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 ov76be_get_control(struct i2c_client *c,
struct ovcamchip_control *ctl)
{
struct ovcamchip *ov = i2c_get_clientdata(c);
struct ov76be *s = ov->spriv;
int rc = 0;
unsigned char val = 0;
switch (ctl->id) {
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_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_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 ov76be_mode_init(struct i2c_client *c, struct ovcamchip_window *win)
{
int qvga = win->quarter;
/******** QVGA-specific regs ********/
ov_write(c, 0x14, qvga?0xa4:0x84);
/******** Palette-specific regs ********/
if (win->format == VIDEO_PALETTE_GREY) {
ov_write_mask(c, 0x0e, 0x40, 0x40);
ov_write_mask(c, 0x13, 0x20, 0x20);
} else {
ov_write_mask(c, 0x0e, 0x00, 0x40);
ov_write_mask(c, 0x13, 0x00, 0x20);
}
/******** Clock programming ********/
ov_write(c, 0x11, win->clockdiv);
/******** Resolution-specific ********/
if (win->width == 640 && win->height == 480)
ov_write(c, 0x35, 0x9e);
else
ov_write(c, 0x35, 0x1e);
return 0;
}
static int ov76be_set_window(struct i2c_client *c, struct ovcamchip_window *win)
{
int ret, hwscale, vwscale;
ret = ov76be_mode_init(c, win);
if (ret < 0)
return ret;
if (win->quarter) {
hwscale = 1;
vwscale = 0;
} else {
hwscale = 2;
vwscale = 1;
}
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 ov76be_command(struct i2c_client *c, unsigned int cmd, void *arg)
{
switch (cmd) {
case OVCAMCHIP_CMD_S_CTRL:
return ov76be_set_control(c, arg);
case OVCAMCHIP_CMD_G_CTRL:
return ov76be_get_control(c, arg);
case OVCAMCHIP_CMD_S_MODE:
return ov76be_set_window(c, arg);
default:
DDEBUG(2, &c->dev, "command not supported: %d", cmd);
return -ENOIOCTLCMD;
}
}
struct ovcamchip_ops ov76be_ops = {
.init = ov76be_init,
.free = ov76be_free,
.command = ov76be_command,
};
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