diff options
Diffstat (limited to 'drivers/net/wireless/rtl8187_dev.c')
| -rw-r--r-- | drivers/net/wireless/rtl8187_dev.c | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/drivers/net/wireless/rtl8187_dev.c b/drivers/net/wireless/rtl8187_dev.c index 991d65c27088..cd839bcb6d78 100644 --- a/drivers/net/wireless/rtl8187_dev.c +++ b/drivers/net/wireless/rtl8187_dev.c @@ -911,9 +911,45 @@ static int rtl8187_config_interface(struct ieee80211_hw *dev, return 0; } -static void rtl8187_conf_erp(struct rtl8187_priv *priv, bool use_short_slot) +static void rtl8187_conf_erp(struct rtl8187_priv *priv, bool use_short_slot, + bool use_short_preamble) { - if (!priv->is_rtl8187b) { + if (priv->is_rtl8187b) { + u8 difs, eifs, slot_time; + u16 ack_timeout; + + if (use_short_slot) { + slot_time = 0x9; + difs = 0x1c; + eifs = 0x53; + } else { + slot_time = 0x14; + difs = 0x32; + eifs = 0x5b; + } + rtl818x_iowrite8(priv, &priv->map->SIFS, 0xa); + rtl818x_iowrite8(priv, &priv->map->SLOT, slot_time); + rtl818x_iowrite8(priv, &priv->map->DIFS, difs); + + /* + * BRSR+1 on 8187B is in fact EIFS register + * Value in units of 4 us + */ + rtl818x_iowrite8(priv, (u8 *)&priv->map->BRSR + 1, eifs); + + /* + * For 8187B, CARRIER_SENSE_COUNTER is in fact ack timeout + * register. In units of 4 us like eifs register + * ack_timeout = ack duration + plcp + difs + preamble + */ + ack_timeout = 112 + 48 + difs; + if (use_short_preamble) + ack_timeout += 72; + else + ack_timeout += 144; + rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, + DIV_ROUND_UP(ack_timeout, 4)); + } else { rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22); if (use_short_slot) { rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9); @@ -936,8 +972,9 @@ static void rtl8187_bss_info_changed(struct ieee80211_hw *dev, { struct rtl8187_priv *priv = dev->priv; - if (changed & BSS_CHANGED_ERP_SLOT) - rtl8187_conf_erp(priv, info->use_short_slot); + if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE)) + rtl8187_conf_erp(priv, info->use_short_slot, + info->use_short_preamble); } static void rtl8187_configure_filter(struct ieee80211_hw *dev, |