LXR linux/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 */
  39static 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 */
  60static 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
 102static 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
 125int 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}
 170EXPORT_SYMBOL(ath9k_cmn_init_channels_rates);
 171
 172void 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}
 228EXPORT_SYMBOL(ath9k_cmn_setup_ht_cap);
 229
 230void 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}
 244EXPORT_SYMBOL(ath9k_cmn_reload_chainmask);
 245