1 /*
2  * Copyright (c) 2008-2011 Atheros Communications Inc.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /* We use the hw_value as an index into our private channel structure */
18 
19 #include "common.h"
20 
21 #define CHAN2G(_freq, _idx)  { \
22 	.band = NL80211_BAND_2GHZ, \
23 	.center_freq = (_freq), \
24 	.hw_value = (_idx), \
25 	.max_power = 20, \
26 }
27 
28 #define CHAN5G(_freq, _idx) { \
29 	.band = NL80211_BAND_5GHZ, \
30 	.center_freq = (_freq), \
31 	.hw_value = (_idx), \
32 	.max_power = 20, \
33 }
34 
35 /* Some 2 GHz radios are actually tunable on 2312-2732
36  * on 5 MHz steps, we support the channels which we know
37  * we have calibration data for all cards though to make
38  * this static */
39 static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
40 	CHAN2G(2412, 0), /* Channel 1 */
41 	CHAN2G(2417, 1), /* Channel 2 */
42 	CHAN2G(2422, 2), /* Channel 3 */
43 	CHAN2G(2427, 3), /* Channel 4 */
44 	CHAN2G(2432, 4), /* Channel 5 */
45 	CHAN2G(2437, 5), /* Channel 6 */
46 	CHAN2G(2442, 6), /* Channel 7 */
47 	CHAN2G(2447, 7), /* Channel 8 */
48 	CHAN2G(2452, 8), /* Channel 9 */
49 	CHAN2G(2457, 9), /* Channel 10 */
50 	CHAN2G(2462, 10), /* Channel 11 */
51 	CHAN2G(2467, 11), /* Channel 12 */
52 	CHAN2G(2472, 12), /* Channel 13 */
53 	CHAN2G(2484, 13), /* Channel 14 */
54 };
55 
56 /* Some 5 GHz radios are actually tunable on XXXX-YYYY
57  * on 5 MHz steps, we support the channels which we know
58  * we have calibration data for all cards though to make
59  * this static */
60 static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
61 	/* _We_ call this UNII 1 */
62 	CHAN5G(5180, 14), /* Channel 36 */
63 	CHAN5G(5200, 15), /* Channel 40 */
64 	CHAN5G(5220, 16), /* Channel 44 */
65 	CHAN5G(5240, 17), /* Channel 48 */
66 	/* _We_ call this UNII 2 */
67 	CHAN5G(5260, 18), /* Channel 52 */
68 	CHAN5G(5280, 19), /* Channel 56 */
69 	CHAN5G(5300, 20), /* Channel 60 */
70 	CHAN5G(5320, 21), /* Channel 64 */
71 	/* _We_ call this "Middle band" */
72 	CHAN5G(5500, 22), /* Channel 100 */
73 	CHAN5G(5520, 23), /* Channel 104 */
74 	CHAN5G(5540, 24), /* Channel 108 */
75 	CHAN5G(5560, 25), /* Channel 112 */
76 	CHAN5G(5580, 26), /* Channel 116 */
77 	CHAN5G(5600, 27), /* Channel 120 */
78 	CHAN5G(5620, 28), /* Channel 124 */
79 	CHAN5G(5640, 29), /* Channel 128 */
80 	CHAN5G(5660, 30), /* Channel 132 */
81 	CHAN5G(5680, 31), /* Channel 136 */
82 	CHAN5G(5700, 32), /* Channel 140 */
83 	/* _We_ call this UNII 3 */
84 	CHAN5G(5745, 33), /* Channel 149 */
85 	CHAN5G(5765, 34), /* Channel 153 */
86 	CHAN5G(5785, 35), /* Channel 157 */
87 	CHAN5G(5805, 36), /* Channel 161 */
88 	CHAN5G(5825, 37), /* Channel 165 */
89 };
90 
91 /* Atheros hardware rate code addition for short preamble */
92 #define SHPCHECK(__hw_rate, __flags) \
93 	((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)
94 
95 #define RATE(_bitrate, _hw_rate, _flags) {              \
96 	.bitrate        = (_bitrate),                   \
97 	.flags          = (_flags),                     \
98 	.hw_value       = (_hw_rate),                   \
99 	.hw_value_short = (SHPCHECK(_hw_rate, _flags))  \
100 }
101 
102 static struct ieee80211_rate ath9k_legacy_rates[] = {
103 	RATE(10, 0x1b, 0),
104 	RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
105 	RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
106 	RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
107 	RATE(60, 0x0b, (IEEE80211_RATE_SUPPORTS_5MHZ |
108 			IEEE80211_RATE_SUPPORTS_10MHZ)),
109 	RATE(90, 0x0f, (IEEE80211_RATE_SUPPORTS_5MHZ |
110 			IEEE80211_RATE_SUPPORTS_10MHZ)),
111 	RATE(120, 0x0a, (IEEE80211_RATE_SUPPORTS_5MHZ |
112 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
113 	RATE(180, 0x0e, (IEEE80211_RATE_SUPPORTS_5MHZ |
114 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
115 	RATE(240, 0x09, (IEEE80211_RATE_SUPPORTS_5MHZ |
116 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
117 	RATE(360, 0x0d, (IEEE80211_RATE_SUPPORTS_5MHZ |
118 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
119 	RATE(480, 0x08, (IEEE80211_RATE_SUPPORTS_5MHZ |
120 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
121 	RATE(540, 0x0c, (IEEE80211_RATE_SUPPORTS_5MHZ |
122 			 IEEE80211_RATE_SUPPORTS_10MHZ)),
123 };
124 
125 int ath9k_cmn_init_channels_rates(struct ath_common *common)
126 {
127 	struct ath_hw *ah = (struct ath_hw *)common->ah;
128 	void *channels;
129 
130 	BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
131 		     ARRAY_SIZE(ath9k_5ghz_chantable) !=
132 		     ATH9K_NUM_CHANNELS);
133 
134 	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) {
135 		channels = devm_kzalloc(ah->dev,
136 			sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
137 		if (!channels)
138 		    return -ENOMEM;
139 
140 		memcpy(channels, ath9k_2ghz_chantable,
141 		       sizeof(ath9k_2ghz_chantable));
142 		common->sbands[NL80211_BAND_2GHZ].channels = channels;
143 		common->sbands[NL80211_BAND_2GHZ].band = NL80211_BAND_2GHZ;
144 		common->sbands[NL80211_BAND_2GHZ].n_channels =
145 			ARRAY_SIZE(ath9k_2ghz_chantable);
146 		common->sbands[NL80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
147 		common->sbands[NL80211_BAND_2GHZ].n_bitrates =
148 			ARRAY_SIZE(ath9k_legacy_rates);
149 	}
150 
151 	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) {
152 		channels = devm_kzalloc(ah->dev,
153 			sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
154 		if (!channels)
155 			return -ENOMEM;
156 
157 		memcpy(channels, ath9k_5ghz_chantable,
158 		       sizeof(ath9k_5ghz_chantable));
159 		common->sbands[NL80211_BAND_5GHZ].channels = channels;
160 		common->sbands[NL80211_BAND_5GHZ].band = NL80211_BAND_5GHZ;
161 		common->sbands[NL80211_BAND_5GHZ].n_channels =
162 			ARRAY_SIZE(ath9k_5ghz_chantable);
163 		common->sbands[NL80211_BAND_5GHZ].bitrates =
164 			ath9k_legacy_rates + 4;
165 		common->sbands[NL80211_BAND_5GHZ].n_bitrates =
166 			ARRAY_SIZE(ath9k_legacy_rates) - 4;
167 	}
168 	return 0;
169 }
170 EXPORT_SYMBOL(ath9k_cmn_init_channels_rates);
171 
172 void ath9k_cmn_setup_ht_cap(struct ath_hw *ah,
173 			    struct ieee80211_sta_ht_cap *ht_info)
174 {
175 	struct ath_common *common = ath9k_hw_common(ah);
176 	u8 tx_streams, rx_streams;
177 	int i, max_streams;
178 
179 	ht_info->ht_supported = true;
180 	ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
181 		       IEEE80211_HT_CAP_SM_PS |
182 		       IEEE80211_HT_CAP_SGI_40 |
183 		       IEEE80211_HT_CAP_DSSSCCK40;
184 
185 	if (ah->caps.hw_caps & ATH9K_HW_CAP_LDPC)
186 		ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
187 
188 	if (ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
189 		ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
190 
191 	ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
192 	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
193 
194 	if (AR_SREV_9271(ah) || AR_SREV_9330(ah) || AR_SREV_9485(ah) || AR_SREV_9565(ah))
195 		max_streams = 1;
196 	else if (AR_SREV_9462(ah))
197 		max_streams = 2;
198 	else if (AR_SREV_9300_20_OR_LATER(ah))
199 		max_streams = 3;
200 	else
201 		max_streams = 2;
202 
203 	if (AR_SREV_9280_20_OR_LATER(ah)) {
204 		if (max_streams >= 2)
205 			ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
206 		ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
207 	}
208 
209 	/* set up supported mcs set */
210 	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
211 	tx_streams = ath9k_cmn_count_streams(ah->txchainmask, max_streams);
212 	rx_streams = ath9k_cmn_count_streams(ah->rxchainmask, max_streams);
213 
214 	ath_dbg(common, CONFIG, "TX streams %d, RX streams: %d\n",
215 		tx_streams, rx_streams);
216 
217 	if (tx_streams != rx_streams) {
218 		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
219 		ht_info->mcs.tx_params |= ((tx_streams - 1) <<
220 				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
221 	}
222 
223 	for (i = 0; i < rx_streams; i++)
224 		ht_info->mcs.rx_mask[i] = 0xff;
225 
226 	ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
227 }
228 EXPORT_SYMBOL(ath9k_cmn_setup_ht_cap);
229 
230 void ath9k_cmn_reload_chainmask(struct ath_hw *ah)
231 {
232 	struct ath_common *common = ath9k_hw_common(ah);
233 
234 	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_HT))
235 		return;
236 
237 	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
238 		ath9k_cmn_setup_ht_cap(ah,
239 			&common->sbands[NL80211_BAND_2GHZ].ht_cap);
240 	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
241 		ath9k_cmn_setup_ht_cap(ah,
242 			&common->sbands[NL80211_BAND_5GHZ].ht_cap);
243 }
244 EXPORT_SYMBOL(ath9k_cmn_reload_chainmask);
245