drivers/net/wireless/ath/ath9k/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 "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);