sys/dev/netif/ath/hal/ath_hal/ar5212/ar5212_eeprom.c

   1 /*
   2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
   3  * Copyright (c) 2002-2008 Atheros Communications, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  *
  17  * $Id: ar5212_eeprom.c,v 1.6 2008/11/10 04:08:03 sam Exp $
  18  */
  19 #include "opt_ah.h"
  20
  21 #include "ah.h"
  22 #include "ah_internal.h"
  23 #include "ah_devid.h"
  24 #ifdef AH_DEBUG
  25 #include "ah_desc.h"                    /* NB: for HAL_PHYERR* */
  26 #endif
  27
  28 #include "ar5212/ar5212.h"
  29 #include "ar5212/ar5212reg.h"
  30 #include "ar5212/ar5212phy.h"
  31
  32 /*
  33  * Read 16 bits of data from offset into *data
  34  */
  35 HAL_BOOL
  36 ar5212EepromRead(struct ath_hal *ah, u_int off, uint16_t *data)
  37 {
  38         OS_REG_WRITE(ah, AR_EEPROM_ADDR, off);
  39         OS_REG_WRITE(ah, AR_EEPROM_CMD, AR_EEPROM_CMD_READ);
  40
  41         if (!ath_hal_wait(ah, AR_EEPROM_STS,
  42             AR_EEPROM_STS_READ_COMPLETE | AR_EEPROM_STS_READ_ERROR,
  43             AR_EEPROM_STS_READ_COMPLETE)) {
  44                 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: read failed for entry 0x%x\n",
  45                     __func__, off);
  46                 return AH_FALSE;
  47         }
  48         *data = OS_REG_READ(ah, AR_EEPROM_DATA) & 0xffff;
  49         return AH_TRUE;
  50 }