ar9285_phy.c revision 222301 
1/*
2 * Copyright (c) 2008-2010 Atheros Communications Inc.
3 * Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/ath/ath_hal/ar9002/ar9285_phy.c 222301 2011-05-26 09:15:33Z adrian $
27 */
28#include "opt_ah.h"
29
30#include "ah.h"
31#include "ah_internal.h"
32#include "ah_devid.h"
33#include "ah_eeprom_v4k.h"
34
35#include "ar9002/ar9280.h"
36#include "ar9002/ar9285.h"
37#include "ar5416/ar5416reg.h"
38#include "ar5416/ar5416phy.h"
39#include "ar9002/ar9285phy.h"
40#include "ar9002/ar9285_phy.h"
41
42void
43ar9285_antdiv_comb_conf_get(struct ath_hal *ah,
44    struct ar9285_antcomb_conf *antconf)
45{
46	uint32_t regval;
47
48	regval = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
49	antconf->main_lna_conf = (regval & AR_PHY_9285_ANT_DIV_MAIN_LNACONF) >>
50				  AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S;
51	antconf->alt_lna_conf = (regval & AR_PHY_9285_ANT_DIV_ALT_LNACONF) >>
52				 AR_PHY_9285_ANT_DIV_ALT_LNACONF_S;
53	antconf->fast_div_bias = (regval & AR_PHY_9285_FAST_DIV_BIAS) >>
54				  AR_PHY_9285_FAST_DIV_BIAS_S;
55}
56
57void
58ar9285_antdiv_comb_conf_set(struct ath_hal *ah,
59    struct ar9285_antcomb_conf *antconf)
60{
61	uint32_t regval;
62
63	regval = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
64	regval &= ~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF |
65		    AR_PHY_9285_ANT_DIV_ALT_LNACONF |
66		    AR_PHY_9285_FAST_DIV_BIAS);
67	regval |= ((antconf->main_lna_conf << AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S)
68		   & AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
69	regval |= ((antconf->alt_lna_conf << AR_PHY_9285_ANT_DIV_ALT_LNACONF_S)
70		   & AR_PHY_9285_ANT_DIV_ALT_LNACONF);
71	regval |= ((antconf->fast_div_bias << AR_PHY_9285_FAST_DIV_BIAS_S)
72		   & AR_PHY_9285_FAST_DIV_BIAS);
73
74	OS_REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
75}
76
77/*
78 * Check whether combined + fast antenna diversity should be enabled.
79 *
80 * This enables software-driven RX antenna diversity based on RX
81 * RSSI + antenna config packet sampling.
82 */
83HAL_BOOL
84ar9285_check_div_comb(struct ath_hal *ah)
85{
86	uint8_t ant_div_ctl1;
87	HAL_EEPROM_v4k *ee = AH_PRIVATE(ah)->ah_eeprom;
88        const MODAL_EEP4K_HEADER *pModal = &ee->ee_base.modalHeader;
89
90#if 0
91	/* For now, simply disable this until it's better debugged. -adrian */
92	return AH_FALSE;
93#endif
94
95	if (! AR_SREV_KITE(ah))
96		return AH_FALSE;
97
98	if (pModal->version < 3)
99		return AH_FALSE;
100
101	ant_div_ctl1 = pModal->antdiv_ctl1;
102	if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1))
103		return AH_TRUE;
104
105	return AH_FALSE;
106}
107