path: root/drivers/net/wireless/ath/ath9k/eeprom_9287.c

/*
 * Copyright (c) 2008-2009 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.
 */

#include "ath9k.h"

static int ath9k_hw_AR9287_get_eeprom_ver(struct ath_hw *ah)
{
	return (ah->eeprom.map9287.baseEepHeader.version >> 12) & 0xF;
}

static int ath9k_hw_AR9287_get_eeprom_rev(struct ath_hw *ah)
{
	return (ah->eeprom.map9287.baseEepHeader.version) & 0xFFF;
}

static bool ath9k_hw_AR9287_fill_eeprom(struct ath_hw *ah)
{
	struct ar9287_eeprom *eep = &ah->eeprom.map9287;
	u16 *eep_data;
	int addr, eep_start_loc = AR9287_EEP_START_LOC;
	eep_data = (u16 *)eep;

	if (!ath9k_hw_use_flash(ah)) {
		DPRINTF(ah->ah_sc, ATH_DBG_EEPROM,
			"Reading from EEPROM, not flash\n");
	}

	for (addr = 0; addr < sizeof(struct ar9287_eeprom) / sizeof(u16);
			addr++)	{
		if (!ath9k_hw_nvram_read(ah, addr + eep_start_loc, eep_data)) {
			DPRINTF(ah->ah_sc, ATH_DBG_EEPROM,
				"Unable to read eeprom region \n");
			return false;
		}
		eep_data++;
	}
	return true;
}

static int ath9k_hw_AR9287_check_eeprom(struct ath_hw *ah)
{
	u32 sum = 0, el, integer;
	u16 temp, word, magic, magic2, *eepdata;
	int i, addr;
	bool need_swap = false;
	struct ar9287_eeprom *eep = &ah->eeprom.map9287;

	if (!ath9k_hw_use_flash(ah)) {
		if (!ath9k_hw_nvram_read
		    (ah, AR5416_EEPROM_MAGIC_OFFSET, &magic)) {
			DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
				"Reading Magic # failed\n");
			return false;
		}

		DPRINTF(ah->ah_sc, ATH_DBG_EEPROM,
				"Read Magic = 0x%04X\n", magic);
		if (magic != AR5416_EEPROM_MAGIC) {
			magic2 = swab16(magic);

			if (magic2 == AR5416_EEPROM_MAGIC) {
				need_swap = true;
				eepdata = (u16 *)(&ah->eeprom);

				for (addr = 0;
				     addr < sizeof(struct ar9287_eeprom) / sizeof(u16);
				     addr++) {
					temp = swab16(*eepdata);
					*eepdata = temp;
					eepdata++;
				}
			} else {
				DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
					"Invalid EEPROM Magic. "
					"endianness mismatch.\n");
				return -EINVAL;
			}
		}
	}