/*
 * Shared Code for OmniVision Camera Chip Drivers
 *
 * Copyright (c) 2002 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* This file is not a module yet */
#define __NO_VERSION__

#if defined(OUTSIDE_KERNEL)
	#if !defined(EXPORT_SYMTAB)
		#define EXPORT_SYMTAB
	#endif

	#include <linux/config.h>

	#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
		#define MODVERSIONS
	#endif

	#include <linux/version.h>

	#ifdef MODVERSIONS
		#include <linux/modversions.h>
	#endif
#else
	#include <linux/config.h>
	#include <linux/version.h>
#endif

#include "ov511.h"

int
ov_write_regvals(struct i2c_client *client, struct ovsensor_regvals *rvals)
{
	int rc;

	while (rvals->reg != 0xff) {
		rc = ov_write(client, rvals->reg, rvals->val);
		if (rc < 0)
			return rc;
		rvals++;
	}

	return 0;
}

/* Writes bits at positions specified by mask to an I2C reg. Bits that are in
 * the same position as 1's in "mask" are cleared and set to "value". Bits
 * that are in the same position as 0's in "mask" are preserved, regardless
 * of their respective state in "value".
 */
int
ov_write_mask(struct i2c_client *client,
	      unsigned char reg,
	      unsigned char value,
	      unsigned char mask)
{
	int rc;
	unsigned char oldval, newval;

	if (mask == 0xff) {
		newval = value;
	} else {
		rc = ov_read(client, reg, &oldval);
		if (rc < 0)
			return rc;

		oldval &= (~mask);		/* Clear the masked bits */
		value &= mask;			/* Enforce mask on value */
		newval = oldval | value;	/* Set the desired bits */
	}

	return ov_write(client, reg, newval);
}