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openwrtv4/package/mac80211/patches/340-ath9k_ap_rc.patch
Imre Kaloz ac791ee623 add two patches for ath9k 802.11n AP mode 
SVN-Revision: 13497
2008-12-03 10:21:20 +00:00

210 lines
6.9 KiB
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Raw Blame History

Hostapd now passes the HT parameters through the config()
callback, use these to set the appropriate channel in AP mode.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
---
Note: This patch depends on [PATCHv2] nl80211: Add frequency configuration (including HT40)
posted by Jouni.
drivers/net/wireless/ath9k/main.c | 60 ++++++++++++++++++++++++++----------
drivers/net/wireless/ath9k/rc.c | 55 +++++++++++++++++++++++++++++----
2 files changed, 91 insertions(+), 24 deletions(-)
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 6e103d5..d1ddb07 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -622,35 +622,35 @@ static int ath_get_channel(struct ath_softc *sc,
return -1;
}
+/* ext_chan_offset: (-1, 0, 1) (below, none, above) */
+
static u32 ath_get_extchanmode(struct ath_softc *sc,
struct ieee80211_channel *chan,
- struct ieee80211_bss_conf *bss_conf)
+ int ext_chan_offset,
+ enum ath9k_ht_macmode tx_chan_width)
{
u32 chanmode = 0;
- u8 ext_chan_offset = bss_conf->ht.secondary_channel_offset;
- enum ath9k_ht_macmode tx_chan_width = (bss_conf->ht.width_40_ok) ?
- ATH9K_HT_MACMODE_2040 : ATH9K_HT_MACMODE_20;
switch (chan->band) {
case IEEE80211_BAND_2GHZ:
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
+ if ((ext_chan_offset == 0) &&
(tx_chan_width == ATH9K_HT_MACMODE_20))
chanmode = CHANNEL_G_HT20;
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
+ if ((ext_chan_offset == 1) &&
(tx_chan_width == ATH9K_HT_MACMODE_2040))
chanmode = CHANNEL_G_HT40PLUS;
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
+ if ((ext_chan_offset == -1) &&
(tx_chan_width == ATH9K_HT_MACMODE_2040))
chanmode = CHANNEL_G_HT40MINUS;
break;
case IEEE80211_BAND_5GHZ:
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) &&
+ if ((ext_chan_offset == 0) &&
(tx_chan_width == ATH9K_HT_MACMODE_20))
chanmode = CHANNEL_A_HT20;
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) &&
+ if ((ext_chan_offset == 1) &&
(tx_chan_width == ATH9K_HT_MACMODE_2040))
chanmode = CHANNEL_A_HT40PLUS;
- if ((ext_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) &&
+ if ((ext_chan_offset == -1) &&
(tx_chan_width == ATH9K_HT_MACMODE_2040))
chanmode = CHANNEL_A_HT40MINUS;
break;
@@ -841,6 +841,18 @@ static void ath9k_ht_conf(struct ath_softc *sc,
}
}
+static inline int ath_sec_offset(u8 ext_offset)
+{
+ if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE)
+ return 0;
+ else if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
+ return 1;
+ else if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
+ return -1;
+
+ return 0;
+}
+
static void ath9k_bss_assoc_info(struct ath_softc *sc,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf)
@@ -893,13 +905,14 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc,
}
if (hw->conf.ht.enabled) {
- sc->sc_ah->ah_channels[pos].chanmode =
- ath_get_extchanmode(sc, curchan, bss_conf);
+ int offset =
+ ath_sec_offset(bss_conf->ht.secondary_channel_offset);
+ sc->tx_chan_width = (bss_conf->ht.width_40_ok) ?
+ ATH9K_HT_MACMODE_2040 : ATH9K_HT_MACMODE_20;
- if (bss_conf->ht.width_40_ok)
- sc->tx_chan_width = ATH9K_HT_MACMODE_2040;
- else
- sc->tx_chan_width = ATH9K_HT_MACMODE_20;
+ sc->sc_ah->ah_channels[pos].chanmode =
+ ath_get_extchanmode(sc, curchan,
+ offset, sc->tx_chan_width);
} else {
sc->sc_ah->ah_channels[pos].chanmode =
(curchan->band == IEEE80211_BAND_2GHZ) ?
@@ -2172,9 +2185,22 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
(curchan->band == IEEE80211_BAND_2GHZ) ?
CHANNEL_G : CHANNEL_A;
- if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
+ if ((sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP) &&
+ (conf->ht.enabled)) {
+ sc->tx_chan_width = (!!conf->ht.sec_chan_offset) ?
+ ATH9K_HT_MACMODE_2040 : ATH9K_HT_MACMODE_20;
+
+ sc->sc_ah->ah_channels[pos].chanmode =
+ ath_get_extchanmode(sc, curchan,
+ conf->ht.sec_chan_offset,
+ sc->tx_chan_width);
+ }
+
+ if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) {
DPRINTF(sc, ATH_DBG_FATAL,
"%s: Unable to set channel\n", __func__);
+ return -EINVAL;
+ }
}
if (changed & IEEE80211_CONF_CHANGE_HT)
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 93dfea8..7c08583 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1304,6 +1304,38 @@ static void ath_rc_tx_status(struct ath_softc *sc,
xretries, long_retry);
}
+static struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
+ enum ieee80211_band band,
+ bool is_ht, bool is_cw_40)
+{
+ int mode = 0;
+
+ switch(band) {
+ case IEEE80211_BAND_2GHZ:
+ mode = ATH9K_MODE_11G;
+ if (is_ht)
+ mode = ATH9K_MODE_11NG_HT20;
+ if (is_cw_40)
+ mode = ATH9K_MODE_11NG_HT40PLUS;
+ break;
+ case IEEE80211_BAND_5GHZ:
+ mode = ATH9K_MODE_11A;
+ if (is_ht)
+ mode = ATH9K_MODE_11NA_HT20;
+ if (is_cw_40)
+ mode = ATH9K_MODE_11NA_HT40PLUS;
+ break;
+ default:
+ DPRINTF(sc, ATH_DBG_RATE, "Invalid band\n");
+ return NULL;
+ }
+
+ BUG_ON(mode >= ATH9K_MODE_MAX);
+
+ DPRINTF(sc, ATH_DBG_RATE, "Choosing rate table for mode: %d\n", mode);
+ return sc->hw_rate_table[mode];
+}
+
static void ath_rc_init(struct ath_softc *sc,
struct ath_rate_priv *ath_rc_priv,
struct ieee80211_supported_band *sband,
@@ -1314,16 +1346,25 @@ static void ath_rc_init(struct ath_softc *sc,
u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
u8 i, j, k, hi = 0, hthi = 0;
- rate_table = sc->hw_rate_table[sc->sc_curmode];
+ /* FIXME: Adhoc */
+ if ((sc->sc_ah->ah_opmode == ATH9K_M_STA) ||
+ (sc->sc_ah->ah_opmode == ATH9K_M_IBSS)) {
+ bool is_cw_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+ rate_table = ath_choose_rate_table(sc, sband->band,
+ sta->ht_cap.ht_supported,
+ is_cw_40);
+ } else if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP) {
+ /* sc_curmode would be set on init through config() */
+ rate_table = sc->hw_rate_table[sc->sc_curmode];
+ }
- if (sta->ht_cap.ht_supported) {
- if (sband->band == IEEE80211_BAND_2GHZ)
- rate_table = sc->hw_rate_table[ATH9K_MODE_11NG_HT20];
- else
- rate_table = sc->hw_rate_table[ATH9K_MODE_11NA_HT20];
+ if (!rate_table) {
+ DPRINTF(sc, ATH_DBG_FATAL, "Rate table not initialized\n");
+ return;
+ }
+ if (sta->ht_cap.ht_supported) {
ath_rc_priv->ht_cap = (WLAN_RC_HT_FLAG | WLAN_RC_DS_FLAG);
-
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG;
}
--
1.6.0.3
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