diff options
Diffstat (limited to 'drivers/media/video/ovcamchip/ov7x10.c')
| -rw-r--r-- | drivers/media/video/ovcamchip/ov7x10.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/drivers/media/video/ovcamchip/ov7x10.c b/drivers/media/video/ovcamchip/ov7x10.c new file mode 100644 index 0000000..5206e79 --- /dev/null +++ b/drivers/media/video/ovcamchip/ov7x10.c @@ -0,0 +1,334 @@ +/* OmniVision OV7610/OV7110 Camera Chip Support Code + * + * Copyright (c) 1999-2004 Mark McClelland <mark@alpha.dyndns.org> + * http://alpha.dyndns.org/ov511/ + * + * Color fixes by by Orion Sky Lawlor <olawlor@acm.org> (2/26/2000) + * + * 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 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 ov7x10 { + int auto_brt; + int auto_exp; + int bandfilt; + int mirror; +}; + +/* Lawrence Glaister <lg@jfm.bc.ca> reports: + * + * Register 0x0f in the 7610 has the following effects: + * + * 0x85 (AEC method 1): Best overall, good contrast range + * 0x45 (AEC method 2): Very overexposed + * 0xa5 (spec sheet default): Ok, but the black level is + * shifted resulting in loss of contrast + * 0x05 (old driver setting): very overexposed, too much + * contrast + */ +static struct ovcamchip_regvals regvals_init_7x10[] = { + { 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 OV7x10 camera chip and relevant variables. */ +static int ov7x10_init(struct i2c_client *c) +{ + struct ovcamchip *ov = i2c_get_clientdata(c); + struct ov7x10 *s; + int rc; + + DDEBUG(4, &c->dev, "entered"); + + rc = ov_write_regvals(c, regvals_init_7x10); + 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 ov7x10_free(struct i2c_client *c) +{ + struct ovcamchip *ov = i2c_get_clientdata(c); + + kfree(ov->spriv); + return 0; +} + +static int ov7x10_set_control(struct i2c_client *c, + struct ovcamchip_control *ctl) +{ + struct ovcamchip *ov = i2c_get_clientdata(c); + struct ov7x10 *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_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, 0x13, 0x10, 0x10); + if (rc < 0) + goto out; + + rc = ov_write_mask(c, 0x13, 0x00, 0x10); + 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, 0x29, v?0x00:0x80, 0x80); + 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 ov7x10_get_control(struct i2c_client *c, + struct ovcamchip_control *ctl) +{ + struct ovcamchip *ov = i2c_get_clientdata(c); + struct ov7x10 *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_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 ov7x10_mode_init(struct i2c_client *c, struct ovcamchip_window *win) +{ + int qvga = win->quarter; + + /******** QVGA-specific regs ********/ + + ov_write(c, 0x14, qvga?0x24:0x04); + + /******** 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 ov7x10_set_window(struct i2c_client *c, struct ovcamchip_window *win) +{ + int ret, hwscale, vwscale; + + ret = ov7x10_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 ov7x10_command(struct i2c_client *c, unsigned int cmd, void *arg) +{ + switch (cmd) { + case OVCAMCHIP_CMD_S_CTRL: + return ov7x10_set_control(c, arg); + case OVCAMCHIP_CMD_G_CTRL: + return ov7x10_get_control(c, arg); + case OVCAMCHIP_CMD_S_MODE: + return ov7x10_set_window(c, arg); + default: + DDEBUG(2, &c->dev, "command not supported: %d", cmd); + return -ENOIOCTLCMD; + } +} + +struct ovcamchip_ops ov7x10_ops = { + .init = ov7x10_init, + .free = ov7x10_free, + .command = ov7x10_command, +}; |
