diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2800lib.c | 99 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00config.c | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00mac.c | 2 |
4 files changed, 104 insertions, 1 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 19534f272d76..4ecacea677ac 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -1169,6 +1169,102 @@ void rt2800_config_intf(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf, } EXPORT_SYMBOL_GPL(rt2800_config_intf); +static void rt2800_config_ht_opmode(struct rt2x00_dev *rt2x00dev, + struct rt2x00lib_erp *erp) +{ + bool any_sta_nongf = !!(erp->ht_opmode & + IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); + u8 protection = erp->ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION; + u8 mm20_mode, mm40_mode, gf20_mode, gf40_mode; + u16 mm20_rate, mm40_rate, gf20_rate, gf40_rate; + u32 reg; + + /* default protection rate for HT20: OFDM 24M */ + mm20_rate = gf20_rate = 0x4004; + + /* default protection rate for HT40: duplicate OFDM 24M */ + mm40_rate = gf40_rate = 0x4084; + + switch (protection) { + case IEEE80211_HT_OP_MODE_PROTECTION_NONE: + /* + * All STAs in this BSS are HT20/40 but there might be + * STAs not supporting greenfield mode. + * => Disable protection for HT transmissions. + */ + mm20_mode = mm40_mode = gf20_mode = gf40_mode = 0; + + break; + case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: + /* + * All STAs in this BSS are HT20 or HT20/40 but there + * might be STAs not supporting greenfield mode. + * => Protect all HT40 transmissions. + */ + mm20_mode = gf20_mode = 0; + mm40_mode = gf40_mode = 2; + + break; + case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: + /* + * Nonmember protection: + * According to 802.11n we _should_ protect all + * HT transmissions (but we don't have to). + * + * But if cts_protection is enabled we _shall_ protect + * all HT transmissions using a CCK rate. + * + * And if any station is non GF we _shall_ protect + * GF transmissions. + * + * We decide to protect everything + * -> fall through to mixed mode. + */ + case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: + /* + * Legacy STAs are present + * => Protect all HT transmissions. + */ + mm20_mode = mm40_mode = gf20_mode = gf40_mode = 2; + + /* + * If erp protection is needed we have to protect HT + * transmissions with CCK 11M long preamble. + */ + if (erp->cts_protection) { + /* don't duplicate RTS/CTS in CCK mode */ + mm20_rate = mm40_rate = 0x0003; + gf20_rate = gf40_rate = 0x0003; + } + break; + }; + + /* check for STAs not supporting greenfield mode */ + if (any_sta_nongf) + gf20_mode = gf40_mode = 2; + + /* Update HT protection config */ + rt2800_register_read(rt2x00dev, MM20_PROT_CFG, ®); + rt2x00_set_field32(®, MM20_PROT_CFG_PROTECT_RATE, mm20_rate); + rt2x00_set_field32(®, MM20_PROT_CFG_PROTECT_CTRL, mm20_mode); + rt2800_register_write(rt2x00dev, MM20_PROT_CFG, reg); + + rt2800_register_read(rt2x00dev, MM40_PROT_CFG, ®); + rt2x00_set_field32(®, MM40_PROT_CFG_PROTECT_RATE, mm40_rate); + rt2x00_set_field32(®, MM40_PROT_CFG_PROTECT_CTRL, mm40_mode); + rt2800_register_write(rt2x00dev, MM40_PROT_CFG, reg); + + rt2800_register_read(rt2x00dev, GF20_PROT_CFG, ®); + rt2x00_set_field32(®, GF20_PROT_CFG_PROTECT_RATE, gf20_rate); + rt2x00_set_field32(®, GF20_PROT_CFG_PROTECT_CTRL, gf20_mode); + rt2800_register_write(rt2x00dev, GF20_PROT_CFG, reg); + + rt2800_register_read(rt2x00dev, GF40_PROT_CFG, ®); + rt2x00_set_field32(®, GF40_PROT_CFG_PROTECT_RATE, gf40_rate); + rt2x00_set_field32(®, GF40_PROT_CFG_PROTECT_CTRL, gf40_mode); + rt2800_register_write(rt2x00dev, GF40_PROT_CFG, reg); +} + void rt2800_config_erp(struct rt2x00_dev *rt2x00dev, struct rt2x00lib_erp *erp, u32 changed) { @@ -1213,6 +1309,9 @@ void rt2800_config_erp(struct rt2x00_dev *rt2x00dev, struct rt2x00lib_erp *erp, erp->beacon_int * 16); rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg); } + + if (changed & BSS_CHANGED_HT) + rt2800_config_ht_opmode(rt2x00dev, erp); } EXPORT_SYMBOL_GPL(rt2800_config_erp); diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index bab10adae537..75ac6624bf9e 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -458,6 +458,7 @@ struct rt2x00lib_erp { short eifs; u16 beacon_int; + u16 ht_opmode; }; /* diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c index 4c7ff765a8bf..54ffb5aeb34e 100644 --- a/drivers/net/wireless/rt2x00/rt2x00config.c +++ b/drivers/net/wireless/rt2x00/rt2x00config.c @@ -103,6 +103,9 @@ void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev, /* Update global beacon interval time, this is needed for PS support */ rt2x00dev->beacon_int = bss_conf->beacon_int; + if (changed & BSS_CHANGED_HT) + erp.ht_opmode = bss_conf->ht_operation_mode; + rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed); } diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c index 7862a840984a..c3c206a97d54 100644 --- a/drivers/net/wireless/rt2x00/rt2x00mac.c +++ b/drivers/net/wireless/rt2x00/rt2x00mac.c @@ -671,7 +671,7 @@ void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, */ if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | - BSS_CHANGED_BEACON_INT)) + BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); } EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |