xref: /freebsd-11-stable/sys/dev/ath/ath_hal/ar5212/ar5212_eeprom.c

/*
 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2008 Atheros Communications, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $FreeBSD: head/sys/dev/ath/ath_hal/ar5212/ar5212_eeprom.c 204644 2010-03-03 17:32:32Z rpaulo $
 */
#include "opt_ah.h"

#include "ah.h"
#include "ah_internal.h"
#include "ah_devid.h"
#ifdef AH_DEBUG
#include "ah_desc.h"			/* NB: for HAL_PHYERR* */
#endif

#include "ar5212/ar5212.h"
#include "ar5212/ar5212reg.h"
#include "ar5212/ar5212phy.h"

/*
 * Read 16 bits of data from offset into *data
 */
HAL_BOOL
ar5212EepromRead(struct ath_hal *ah, u_int off, uint16_t *data)
{
	OS_REG_WRITE(ah, AR_EEPROM_ADDR, off);
	OS_REG_WRITE(ah, AR_EEPROM_CMD, AR_EEPROM_CMD_READ);

	if (!ath_hal_wait(ah, AR_EEPROM_STS,
	    AR_EEPROM_STS_READ_COMPLETE | AR_EEPROM_STS_READ_ERROR,
	    AR_EEPROM_STS_READ_COMPLETE)) {
		HALDEBUG(ah, HAL_DEBUG_ANY, "%s: read failed for entry 0x%x\n",
		    __func__, off);
		return AH_FALSE;
	}
	*data = OS_REG_READ(ah, AR_EEPROM_DATA) & 0xffff;
	return AH_TRUE;
}