xref: /freebsd/sys/dev/ath/ath_hal/ar5212/ar5212_eeprom.c (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
1 /*-
2  * SPDX-License-Identifier: ISC
3  *
4  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
5  * Copyright (c) 2002-2008 Atheros Communications, Inc.
6  *
7  * Permission to use, copy, modify, and/or distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 }
51