diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-4965.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.c | 52 |
1 files changed, 43 insertions, 9 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index fe7aa73cc0eb..1e4f1bc515db 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -1445,7 +1445,8 @@ static int iwl4965_send_rxon_assoc(struct iwl_priv *priv) return ret; } -static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel) +static int iwl4965_hw_channel_switch(struct iwl_priv *priv, + struct ieee80211_channel_switch *ch_switch) { int rc; u8 band = 0; @@ -1453,11 +1454,14 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel) u8 ctrl_chan_high = 0; struct iwl4965_channel_switch_cmd cmd; const struct iwl_channel_info *ch_info; - + u32 switch_time_in_usec, ucode_switch_time; + u16 ch; + u32 tsf_low; + u8 switch_count; + u16 beacon_interval = le16_to_cpu(priv->rxon_timing.beacon_interval); + struct ieee80211_vif *vif = priv->vif; band = priv->band == IEEE80211_BAND_2GHZ; - ch_info = iwl_get_channel_info(priv, priv->band, channel); - is_ht40 = is_ht40_channel(priv->staging_rxon.flags); if (is_ht40 && @@ -1466,26 +1470,56 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel) cmd.band = band; cmd.expect_beacon = 0; - cmd.channel = cpu_to_le16(channel); + ch = ieee80211_frequency_to_channel(ch_switch->channel->center_freq); + cmd.channel = cpu_to_le16(ch); cmd.rxon_flags = priv->staging_rxon.flags; cmd.rxon_filter_flags = priv->staging_rxon.filter_flags; - cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time); + switch_count = ch_switch->count; + tsf_low = ch_switch->timestamp & 0x0ffffffff; + /* + * calculate the ucode channel switch time + * adding TSF as one of the factor for when to switch + */ + if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) { + if (switch_count > ((priv->ucode_beacon_time - tsf_low) / + beacon_interval)) { + switch_count -= (priv->ucode_beacon_time - + tsf_low) / beacon_interval; + } else + switch_count = 0; + } + if (switch_count <= 1) + cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time); + else { + switch_time_in_usec = + vif->bss_conf.beacon_int * switch_count * TIME_UNIT; + ucode_switch_time = iwl_usecs_to_beacons(priv, + switch_time_in_usec, + beacon_interval); + cmd.switch_time = iwl_add_beacon_time(priv, + priv->ucode_beacon_time, + ucode_switch_time, + beacon_interval); + } + IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n", + cmd.switch_time); + ch_info = iwl_get_channel_info(priv, priv->band, ch); if (ch_info) cmd.expect_beacon = is_channel_radar(ch_info); else { IWL_ERR(priv, "invalid channel switch from %u to %u\n", - priv->active_rxon.channel, channel); + priv->active_rxon.channel, ch); return -EFAULT; } - rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_ht40, + rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40, ctrl_chan_high, &cmd.tx_power); if (rc) { IWL_DEBUG_11H(priv, "error:%d fill txpower_tbl\n", rc); return rc; } - priv->switch_rxon.channel = cpu_to_le16(channel); + priv->switch_rxon.channel = cmd.channel; priv->switch_rxon.switch_in_progress = true; return iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd); |