summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ath/ath9k/common-init.c
blob: 82de0fadbc956d0151a731fdbdb62edf881f86d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* We use the hw_value as an index into our private channel structure */

#include "common.h"

#define CHAN2G(_freq, _idx)  { \
	.band = NL80211_BAND_2GHZ, \
	.center_freq = (_freq), \
	.hw_value = (_idx), \
	.max_power = 20, \
}

#define CHAN5G(_freq, _idx) { \
	.band = NL80211_BAND_5GHZ, \
	.center_freq = (_freq), \
	.hw_value = (_idx), \
	.max_power = 20, \
}

/* Some 2 GHz radios are actually tunable on 2312-2732
 * on 5 MHz steps, we support the channels which we know
 * we have calibration data for all cards though to make
 * this static */
static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
	CHAN2G(2412, 0), /* Channel 1 */
	CHAN2G(2417, 1), /* Channel 2 */
	CHAN2G(2422, 2), /* Channel 3 */
	CHAN2G(2427, 3), /* Channel 4 */
	CHAN2G(2432, 4), /* Channel 5 */
	CHAN2G(2437, 5), /* Channel 6 */
	CHAN2G(2442, 6), /* Channel 7 */
	CHAN2G(2447, 7), /* Channel 8 */
	CHAN2G(2452, 8), /* Channel 9 */
	CHAN2G(2457, 9), /* Channel 10 */
	CHAN2G(2462, 10), /* Channel 11 */
	CHAN2G(2467, 11), /* Channel 12 */
	CHAN2G(2472, 12), /* Channel 13 */
	CHAN2G(2484, 13), /* Channel 14 */
};

/* Some 5 GHz radios are actually tunable on XXXX-YYYY
 * on 5 MHz steps, we support the channels which we know
 * we have calibration data for all cards though to make
 * this static */
static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
	/* _We_ call this UNII 1 */
	CHAN5G(5180, 14), /* Channel 36 */
	CHAN5G(5200, 15), /* Channel 40 */
	CHAN5G(5220, 16), /* Channel 44 */
	CHAN5G(5240, 17), /* Channel 48 */
	/* _We_ call this UNII 2 */
	CHAN5G(5260, 18), /* Channel 52 */
	CHAN5G(5280, 19), /* Channel 56 */
	CHAN5G(5300, 20), /* Channel 60 */
	CHAN5G(5320, 21), /* Channel 64 */
	/* _We_ call this "Middle band" */
	CHAN5G(5500, 22), /* Channel 100 */
	CHAN5G(5520, 23), /* Channel 104 */
	CHAN5G(5540, 24), /* Channel 108 */
	CHAN5G(5560, 25), /* Channel 112 */
	CHAN5G(5580, 26), /* Channel 116 */
	CHAN5G(5600, 27), /* Channel 120 */
	CHAN5G(5620, 28), /* Channel 124 */
	CHAN5G(5640, 29), /* Channel 128 */
	CHAN5G(5660, 30), /* Channel 132 */
	CHAN5G(5680, 31), /* Channel 136 */
	CHAN5G(5700, 32), /* Channel 140 */
	/* _We_ call this UNII 3 */
	CHAN5G(5745, 33), /* Channel 149 */
	CHAN5G(5765, 34), /* Channel 153 */
	CHAN5G(5785, 35), /* Channel 157 */
	CHAN5G(5805, 36), /* Channel 161 */
	CHAN5G(5825, 37), /* Channel 165 */
};

/* Atheros hardware rate code addition for short preamble */
#define SHPCHECK(__hw_rate, __flags) \
	((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)

#define RATE(_bitrate, _hw_rate, _flags) {              \
	.bitrate        = (_bitrate),                   \
	.flags          = (_flags),                     \
	.hw_value       = (_hw_rate),                   \
	.hw_value_short = (SHPCHECK(_hw_rate, _flags))  \
}

static struct ieee80211_rate ath9k_legacy_rates[] = {
	RATE(10, 0x1b, 0),
	RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(60, 0x0b, (IEEE80211_RATE_SUPPORTS_5MHZ |
			IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(90, 0x0f, (IEEE80211_RATE_SUPPORTS_5MHZ |
			IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(120, 0x0a, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(180, 0x0e, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(240, 0x09, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(360, 0x0d, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(480, 0x08, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
	RATE(540, 0x0c, (IEEE80211_RATE_SUPPORTS_5MHZ |
			 IEEE80211_RATE_SUPPORTS_10MHZ)),
};

int ath9k_cmn_init_channels_rates(struct ath_common *common)
{
	struct ath_hw *ah = (struct ath_hw *)common->ah;
	void *channels;

	BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
		     ARRAY_SIZE(ath9k_5ghz_chantable) !=
		     ATH9K_NUM_CHANNELS);

	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) {
		channels = devm_kzalloc(ah->dev,
			sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
		if (!channels)
		    return -ENOMEM;

		memcpy(channels, ath9k_2ghz_chantable,
		       sizeof(ath9k_2ghz_chantable));
		common->sbands[NL80211_BAND_2GHZ].channels = channels;
		common->sbands[NL80211_BAND_2GHZ].band = NL80211_BAND_2GHZ;
		common->sbands[NL80211_BAND_2GHZ].n_channels =
			ARRAY_SIZE(ath9k_2ghz_chantable);
		common->sbands[NL80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
		common->sbands[NL80211_BAND_2GHZ].n_bitrates =
			ARRAY_SIZE(ath9k_legacy_rates);
	}

	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) {
		channels = devm_kzalloc(ah->dev,
			sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
		if (!channels)
			return -ENOMEM;

		memcpy(channels, ath9k_5ghz_chantable,
		       sizeof(ath9k_5ghz_chantable));
		common->sbands[NL80211_BAND_5GHZ].channels = channels;
		common->sbands[NL80211_BAND_5GHZ].band = NL80211_BAND_5GHZ;
		common->sbands[NL80211_BAND_5GHZ].n_channels =
			ARRAY_SIZE(ath9k_5ghz_chantable);
		common->sbands[NL80211_BAND_5GHZ].bitrates =
			ath9k_legacy_rates + 4;
		common->sbands[NL80211_BAND_5GHZ].n_bitrates =
			ARRAY_SIZE(ath9k_legacy_rates) - 4;
	}
	return 0;
}
EXPORT_SYMBOL(ath9k_cmn_init_channels_rates);

void ath9k_cmn_setup_ht_cap(struct ath_hw *ah,
			    struct ieee80211_sta_ht_cap *ht_info)
{
	struct ath_common *common = ath9k_hw_common(ah);
	u8 tx_streams, rx_streams;
	int i, max_streams;

	ht_info->ht_supported = true;
	ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
		       IEEE80211_HT_CAP_SM_PS |
		       IEEE80211_HT_CAP_SGI_40 |
		       IEEE80211_HT_CAP_DSSSCCK40;

	if (ah->caps.hw_caps & ATH9K_HW_CAP_LDPC)
		ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;

	if (ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
		ht_info->cap |= IEEE80211_HT_CAP_SGI_20;

	ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;

	if (AR_SREV_9271(ah) || AR_SREV_9330(ah) || AR_SREV_9485(ah) || AR_SREV_9565(ah))
		max_streams = 1;
	else if (AR_SREV_9462(ah))
		max_streams = 2;
	else if (AR_SREV_9300_20_OR_LATER(ah))
		max_streams = 3;
	else
		max_streams = 2;

	if (AR_SREV_9280_20_OR_LATER(ah)) {
		if (max_streams >= 2)
			ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
		ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
	}

	/* set up supported mcs set */
	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
	tx_streams = ath9k_cmn_count_streams(ah->txchainmask, max_streams);
	rx_streams = ath9k_cmn_count_streams(ah->rxchainmask, max_streams);

	ath_dbg(common, CONFIG, "TX streams %d, RX streams: %d\n",
		tx_streams, rx_streams);

	if (tx_streams != rx_streams) {
		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
		ht_info->mcs.tx_params |= ((tx_streams - 1) <<
				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
	}

	for (i = 0; i < rx_streams; i++)
		ht_info->mcs.rx_mask[i] = 0xff;

	ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
}
EXPORT_SYMBOL(ath9k_cmn_setup_ht_cap);

void ath9k_cmn_reload_chainmask(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);

	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_HT))
		return;

	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
		ath9k_cmn_setup_ht_cap(ah,
			&common->sbands[NL80211_BAND_2GHZ].ht_cap);
	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
		ath9k_cmn_setup_ht_cap(ah,
			&common->sbands[NL80211_BAND_5GHZ].ht_cap);
}
EXPORT_SYMBOL(ath9k_cmn_reload_chainmask);