xref: /freebsd/sys/dev/ath/ath_hal/ar9002/ar9285_phy.c (revision 9f23cbd6cae82fd77edfad7173432fa8dccd0a95)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2008-2010 Atheros Communications Inc.
5  * Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 #include "opt_ah.h"
31 
32 #include "ah.h"
33 #include "ah_internal.h"
34 #include "ah_devid.h"
35 #include "ah_eeprom_v4k.h"
36 
37 #include "ar9002/ar9280.h"
38 #include "ar9002/ar9285.h"
39 #include "ar5416/ar5416reg.h"
40 #include "ar5416/ar5416phy.h"
41 #include "ar9002/ar9285phy.h"
42 #include "ar9002/ar9285_phy.h"
43 
44 void
45 ar9285_antdiv_comb_conf_get(struct ath_hal *ah, HAL_ANT_COMB_CONFIG *antconf)
46 {
47 	uint32_t regval;
48 
49 	regval = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
50 	antconf->main_lna_conf = (regval & AR_PHY_9285_ANT_DIV_MAIN_LNACONF) >>
51 				  AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S;
52 	antconf->alt_lna_conf = (regval & AR_PHY_9285_ANT_DIV_ALT_LNACONF) >>
53 				 AR_PHY_9285_ANT_DIV_ALT_LNACONF_S;
54 	antconf->fast_div_bias = (regval & AR_PHY_9285_FAST_DIV_BIAS) >>
55 				  AR_PHY_9285_FAST_DIV_BIAS_S;
56 	antconf->antdiv_configgroup = DEFAULT_ANTDIV_CONFIG_GROUP;
57 }
58 
59 void
60 ar9285_antdiv_comb_conf_set(struct ath_hal *ah, HAL_ANT_COMB_CONFIG *antconf)
61 {
62 	uint32_t regval;
63 
64 	regval = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
65 	regval &= ~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF |
66 		    AR_PHY_9285_ANT_DIV_ALT_LNACONF |
67 		    AR_PHY_9285_FAST_DIV_BIAS);
68 	regval |= ((antconf->main_lna_conf << AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S)
69 		   & AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
70 	regval |= ((antconf->alt_lna_conf << AR_PHY_9285_ANT_DIV_ALT_LNACONF_S)
71 		   & AR_PHY_9285_ANT_DIV_ALT_LNACONF);
72 	regval |= ((antconf->fast_div_bias << AR_PHY_9285_FAST_DIV_BIAS_S)
73 		   & AR_PHY_9285_FAST_DIV_BIAS);
74 
75 	OS_REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
76 }
77 
78 /*
79  * Check whether combined + fast antenna diversity should be enabled.
80  *
81  * This enables software-driven RX antenna diversity based on RX
82  * RSSI + antenna config packet sampling.
83  */
84 HAL_BOOL
85 ar9285_check_div_comb(struct ath_hal *ah)
86 {
87 	uint8_t ant_div_ctl1;
88 	HAL_EEPROM_v4k *ee = AH_PRIVATE(ah)->ah_eeprom;
89         const MODAL_EEP4K_HEADER *pModal = &ee->ee_base.modalHeader;
90 
91 #if 0
92 	/* For now, simply disable this until it's better debugged. -adrian */
93 	return AH_FALSE;
94 #endif
95 
96 	if (! AR_SREV_KITE(ah))
97 		return AH_FALSE;
98 
99 	if (pModal->version < 3)
100 		return AH_FALSE;
101 
102 	ant_div_ctl1 = pModal->antdiv_ctl1;
103 	if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1))
104 		return AH_TRUE;
105 
106 	return AH_FALSE;
107 }
108