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wl1271: use join command with dummy BSSID

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When we need to change the channel before association, we have to send a join
command with a valid BSSID.  With this patch we use 0baddeadbeef as the
BSSID.  There are ongoing discussions with TI to get this done in a cleaner
way.

When we go back to idle, we issue a CMD_DISCONNECT to make sure the firmware
stops listening to the channel and cleans things up internally.

Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luciano Coelho 2009-12-11 15:40:44 +02:00 committed by John W. Linville
parent cf18be4467
commit c7f43e451b
1 changed files with 65 additions and 10 deletions
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75
drivers/net/wireless/wl12xx/wl1271_main.c
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@ -1130,6 +1130,47 @@ static int wl1271_op_config_interface(struct ieee80211_hw *hw,
}
#endif
static int wl1271_join_channel(struct wl1271 *wl, int channel)
{
int ret;
/* we need to use a dummy BSSID for now */
static const u8 dummy_bssid[ETH_ALEN] = { 0x0b, 0xad, 0xde,
0xad, 0xbe, 0xef };
/* disable mac filter, so we hear everything */
wl->rx_config &= ~CFG_BSSID_FILTER_EN;
wl->channel = channel;
memcpy(wl->bssid, dummy_bssid, ETH_ALEN);
ret = wl1271_cmd_join(wl);
if (ret < 0)
goto out;
wl->joined = true;
out:
return ret;
}
static int wl1271_unjoin_channel(struct wl1271 *wl)
{
int ret;
/* to stop listening to a channel, we disconnect */
ret = wl1271_cmd_disconnect(wl);
if (ret < 0)
goto out;
wl->joined = false;
wl->channel = 0;
memset(wl->bssid, 0, ETH_ALEN);
wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
out:
return ret;
}
static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct wl1271 *wl = hw->priv;
@ -1138,10 +1179,11 @@ static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d %s",
channel,
conf->flags & IEEE80211_CONF_PS ? "on" : "off",
conf->power_level);
conf->power_level,
conf->flags & IEEE80211_CONF_IDLE ? "idle" : "in use");
mutex_lock(&wl->mutex);
@ -1151,16 +1193,17 @@ static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
if (ret < 0)
goto out;
if (channel != wl->channel) {
/*
* We assume that the stack will configure the right channel
* before associating, so we don't need to send a join
* command here. We will join the right channel when the
* BSSID changes
*/
wl->channel = channel;
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
if (conf->flags & IEEE80211_CONF_IDLE && wl->joined)
wl1271_unjoin_channel(wl);
else
wl1271_join_channel(wl, channel);
}
/* if the channel changes while joined, join again */
if (channel != wl->channel && wl->joined)
wl1271_join_channel(wl, channel);
if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
wl1271_info("psm enabled");
@ -1494,6 +1537,18 @@ static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
if (ret < 0)
goto out;
if ((changed & BSS_CHANGED_BSSID) &&
/*
* Now we know the correct bssid, so we send a new join command
* and enable the BSSID filter
*/
memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
wl->rx_config |= CFG_BSSID_FILTER_EN;
memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
wl1271_cmd_join(wl);
wl->joined = true;
}
if (changed & BSS_CHANGED_ASSOC) {
if (bss_conf->assoc) {
wl->aid = bss_conf->aid;