common-init.c

  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 <linux/export.h>
 20#include "common.h"
 21
 22#define CHAN2G(_freq, _idx)  { \
 23	.band = NL80211_BAND_2GHZ, \
 24	.center_freq = (_freq), \
 25	.hw_value = (_idx), \
 26	.max_power = 20, \
 27}
 28
 29#define CHAN5G(_freq, _idx) { \
 30	.band = NL80211_BAND_5GHZ, \
 31	.center_freq = (_freq), \
 32	.hw_value = (_idx), \
 33	.max_power = 20, \
 34}
 35
 36/* Some 2 GHz radios are actually tunable on 2312-2732
 37 * on 5 MHz steps, we support the channels which we know
 38 * we have calibration data for all cards though to make
 39 * this static */
 40static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
 41	CHAN2G(2412, 0), /* Channel 1 */
 42	CHAN2G(2417, 1), /* Channel 2 */
 43	CHAN2G(2422, 2), /* Channel 3 */
 44	CHAN2G(2427, 3), /* Channel 4 */
 45	CHAN2G(2432, 4), /* Channel 5 */
 46	CHAN2G(2437, 5), /* Channel 6 */
 47	CHAN2G(2442, 6), /* Channel 7 */
 48	CHAN2G(2447, 7), /* Channel 8 */
 49	CHAN2G(2452, 8), /* Channel 9 */
 50	CHAN2G(2457, 9), /* Channel 10 */
 51	CHAN2G(2462, 10), /* Channel 11 */
 52	CHAN2G(2467, 11), /* Channel 12 */
 53	CHAN2G(2472, 12), /* Channel 13 */
 54	CHAN2G(2484, 13), /* Channel 14 */
 55};
 56
 57/* Some 5 GHz radios are actually tunable on XXXX-YYYY
 58 * on 5 MHz steps, we support the channels which we know
 59 * we have calibration data for all cards though to make
 60 * this static */
 61static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
 62	/* _We_ call this UNII 1 */
 63	CHAN5G(5180, 14), /* Channel 36 */
 64	CHAN5G(5200, 15), /* Channel 40 */
 65	CHAN5G(5220, 16), /* Channel 44 */
 66	CHAN5G(5240, 17), /* Channel 48 */
 67	/* _We_ call this UNII 2 */
 68	CHAN5G(5260, 18), /* Channel 52 */
 69	CHAN5G(5280, 19), /* Channel 56 */
 70	CHAN5G(5300, 20), /* Channel 60 */
 71	CHAN5G(5320, 21), /* Channel 64 */
 72	/* _We_ call this "Middle band" */
 73	CHAN5G(5500, 22), /* Channel 100 */
 74	CHAN5G(5520, 23), /* Channel 104 */
 75	CHAN5G(5540, 24), /* Channel 108 */
 76	CHAN5G(5560, 25), /* Channel 112 */
 77	CHAN5G(5580, 26), /* Channel 116 */
 78	CHAN5G(5600, 27), /* Channel 120 */
 79	CHAN5G(5620, 28), /* Channel 124 */
 80	CHAN5G(5640, 29), /* Channel 128 */
 81	CHAN5G(5660, 30), /* Channel 132 */
 82	CHAN5G(5680, 31), /* Channel 136 */
 83	CHAN5G(5700, 32), /* Channel 140 */
 84	/* _We_ call this UNII 3 */
 85	CHAN5G(5745, 33), /* Channel 149 */
 86	CHAN5G(5765, 34), /* Channel 153 */
 87	CHAN5G(5785, 35), /* Channel 157 */
 88	CHAN5G(5805, 36), /* Channel 161 */
 89	CHAN5G(5825, 37), /* Channel 165 */
 90};
 91
 92/* Atheros hardware rate code addition for short preamble */
 93#define SHPCHECK(__hw_rate, __flags) \
 94	((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)
 95
 96#define RATE(_bitrate, _hw_rate, _flags) {              \
 97	.bitrate        = (_bitrate),                   \
 98	.flags          = (_flags),                     \
 99	.hw_value       = (_hw_rate),                   \
100	.hw_value_short = (SHPCHECK(_hw_rate, _flags))  \
101}
102
103static struct ieee80211_rate ath9k_legacy_rates[] = {
104	RATE(10, 0x1b, 0),
105	RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
106	RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
107	RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
108	RATE(60, 0x0b, (IEEE80211_RATE_SUPPORTS_5MHZ |
109			IEEE80211_RATE_SUPPORTS_10MHZ)),
110	RATE(90, 0x0f, (IEEE80211_RATE_SUPPORTS_5MHZ |
111			IEEE80211_RATE_SUPPORTS_10MHZ)),
112	RATE(120, 0x0a, (IEEE80211_RATE_SUPPORTS_5MHZ |
113			 IEEE80211_RATE_SUPPORTS_10MHZ)),
114	RATE(180, 0x0e, (IEEE80211_RATE_SUPPORTS_5MHZ |
115			 IEEE80211_RATE_SUPPORTS_10MHZ)),
116	RATE(240, 0x09, (IEEE80211_RATE_SUPPORTS_5MHZ |
117			 IEEE80211_RATE_SUPPORTS_10MHZ)),
118	RATE(360, 0x0d, (IEEE80211_RATE_SUPPORTS_5MHZ |
119			 IEEE80211_RATE_SUPPORTS_10MHZ)),
120	RATE(480, 0x08, (IEEE80211_RATE_SUPPORTS_5MHZ |
121			 IEEE80211_RATE_SUPPORTS_10MHZ)),
122	RATE(540, 0x0c, (IEEE80211_RATE_SUPPORTS_5MHZ |
123			 IEEE80211_RATE_SUPPORTS_10MHZ)),
124};
125
126int ath9k_cmn_init_channels_rates(struct ath_common *common)
127{
128	struct ath_hw *ah = common->ah;
129	void *channels;
130
131	BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
132		     ARRAY_SIZE(ath9k_5ghz_chantable) !=
133		     ATH9K_NUM_CHANNELS);
134
135	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) {
136		channels = devm_kzalloc(ah->dev,
137			sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
138		if (!channels)
139		    return -ENOMEM;
140
141		memcpy(channels, ath9k_2ghz_chantable,
142		       sizeof(ath9k_2ghz_chantable));
143		common->sbands[NL80211_BAND_2GHZ].channels = channels;
144		common->sbands[NL80211_BAND_2GHZ].band = NL80211_BAND_2GHZ;
145		common->sbands[NL80211_BAND_2GHZ].n_channels =
146			ARRAY_SIZE(ath9k_2ghz_chantable);
147		common->sbands[NL80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
148		common->sbands[NL80211_BAND_2GHZ].n_bitrates =
149			ARRAY_SIZE(ath9k_legacy_rates);
150	}
151
152	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) {
153		channels = devm_kzalloc(ah->dev,
154			sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
155		if (!channels)
156			return -ENOMEM;
157
158		memcpy(channels, ath9k_5ghz_chantable,
159		       sizeof(ath9k_5ghz_chantable));
160		common->sbands[NL80211_BAND_5GHZ].channels = channels;
161		common->sbands[NL80211_BAND_5GHZ].band = NL80211_BAND_5GHZ;
162		common->sbands[NL80211_BAND_5GHZ].n_channels =
163			ARRAY_SIZE(ath9k_5ghz_chantable);
164		common->sbands[NL80211_BAND_5GHZ].bitrates =
165			ath9k_legacy_rates + 4;
166		common->sbands[NL80211_BAND_5GHZ].n_bitrates =
167			ARRAY_SIZE(ath9k_legacy_rates) - 4;
168	}
169	return 0;
170}
171EXPORT_SYMBOL(ath9k_cmn_init_channels_rates);
172
173void ath9k_cmn_setup_ht_cap(struct ath_hw *ah,
174			    struct ieee80211_sta_ht_cap *ht_info)
175{
176	struct ath_common *common = ath9k_hw_common(ah);
177	u8 tx_streams, rx_streams;
178	int i, max_streams;
179
180	ht_info->ht_supported = true;
181	ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
182		       IEEE80211_HT_CAP_SM_PS |
183		       IEEE80211_HT_CAP_SGI_40 |
184		       IEEE80211_HT_CAP_DSSSCCK40;
185
186	if (ah->caps.hw_caps & ATH9K_HW_CAP_LDPC)
187		ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
188
189	if (ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
190		ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
191
192	ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
193	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
194
195	if (AR_SREV_9271(ah) || AR_SREV_9330(ah) || AR_SREV_9485(ah) || AR_SREV_9565(ah))
196		max_streams = 1;
197	else if (AR_SREV_9462(ah))
198		max_streams = 2;
199	else if (AR_SREV_9300_20_OR_LATER(ah))
200		max_streams = 3;
201	else
202		max_streams = 2;
203
204	if (AR_SREV_9280_20_OR_LATER(ah)) {
205		if (max_streams >= 2)
206			ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
207		ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
208	}
209
210	/* set up supported mcs set */
211	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
212	tx_streams = ath9k_cmn_count_streams(ah->txchainmask, max_streams);
213	rx_streams = ath9k_cmn_count_streams(ah->rxchainmask, max_streams);
214
215	ath_dbg(common, CONFIG, "TX streams %d, RX streams: %d\n",
216		tx_streams, rx_streams);
217
218	if (tx_streams != rx_streams) {
219		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
220		ht_info->mcs.tx_params |= ((tx_streams - 1) <<
221				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
222	}
223
224	for (i = 0; i < rx_streams; i++)
225		ht_info->mcs.rx_mask[i] = 0xff;
226
227	ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
228}
229EXPORT_SYMBOL(ath9k_cmn_setup_ht_cap);
230
231void ath9k_cmn_reload_chainmask(struct ath_hw *ah)
232{
233	struct ath_common *common = ath9k_hw_common(ah);
234
235	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_HT))
236		return;
237
238	if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
239		ath9k_cmn_setup_ht_cap(ah,
240			&common->sbands[NL80211_BAND_2GHZ].ht_cap);
241	if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
242		ath9k_cmn_setup_ht_cap(ah,
243			&common->sbands[NL80211_BAND_5GHZ].ht_cap);
244}
245EXPORT_SYMBOL(ath9k_cmn_reload_chainmask);