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carl9170: configurable beacon rates 

Previously, the beacon rate was fixed to either:
 * 1Mb/s [2.4GHz band]
 * 6Mb/s [5GHz band]

This limitation has been addressed and now the
beacon rate is selected by ieee80211_tx_info's
rate control info, almost like any ordinary
data frame.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2010-10-30 00:36:53 +02:00 committed by John W. Linville
parent 2a6cef513f
commit 3eedb6f436
1 changed files with 32 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/net/wireless/ath/carl9170/mac.c
View File

@ -457,8 +457,9 @@ int carl9170_set_beacon_timers(struct ar9170 *ar)
int carl9170_update_beacon(struct ar9170 *ar, const bool submit)
{
struct sk_buff *skb;
struct sk_buff *skb = NULL;
struct carl9170_vif_info *cvif;
struct ieee80211_tx_info *txinfo;
__le32 *data, *old = NULL;
u32 word, off, addr, len;
int i = 0, err = 0;
@ -487,7 +488,13 @@ found:
if (!skb) {
err = -ENOMEM;
goto out_unlock;
goto err_free;
}
txinfo = IEEE80211_SKB_CB(skb);
if (txinfo->control.rates[0].flags & IEEE80211_TX_RC_MCS) {
err = -EINVAL;
goto err_free;
}
spin_lock_bh(&ar->beacon_lock);
@ -504,11 +511,8 @@ found:
wiphy_err(ar->hw->wiphy, "beacon does not "
"fit into device memory!\n");
}
spin_unlock_bh(&ar->beacon_lock);
dev_kfree_skb_any(skb);
err = -EINVAL;
goto out_unlock;
goto err_unlock;
}
if (len > AR9170_MAC_BCN_LENGTH_MAX) {
@ -518,22 +522,22 @@ found:
AR9170_MAC_BCN_LENGTH_MAX, len);
}
spin_unlock_bh(&ar->beacon_lock);
dev_kfree_skb_any(skb);
err = -EMSGSIZE;
goto out_unlock;
goto err_unlock;
}
i = txinfo->control.rates[0].idx;
if (txinfo->band != IEEE80211_BAND_2GHZ)
i += 4;
word = __carl9170_ratetable[i].hw_value & 0xf;
if (i < 4)
word |= ((skb->len + FCS_LEN) << (3 + 16)) + 0x0400;
else
word |= ((skb->len + FCS_LEN) << 16) + 0x0010;
carl9170_async_regwrite_begin(ar);
/* XXX: use skb->cb info */
if (ar->hw->conf.channel->band == IEEE80211_BAND_2GHZ) {
carl9170_async_regwrite(AR9170_MAC_REG_BCN_PLCP,
((skb->len + FCS_LEN) << (3 + 16)) + 0x0400);
} else {
carl9170_async_regwrite(AR9170_MAC_REG_BCN_PLCP,
((skb->len + FCS_LEN) << 16) + 0x001b);
}
carl9170_async_regwrite(AR9170_MAC_REG_BCN_PLCP, word);
for (i = 0; i < DIV_ROUND_UP(skb->len, 4); i++) {
/*
@ -557,7 +561,7 @@ found:
cvif->beacon = skb;
spin_unlock_bh(&ar->beacon_lock);
if (err)
goto out_unlock;
goto err_free;
if (submit) {
err = carl9170_bcn_ctrl(ar, cvif->id,
@ -565,10 +569,18 @@ found:
addr, skb->len + FCS_LEN);
if (err)
goto out_unlock;
goto err_free;
}
out_unlock:
rcu_read_unlock();
return 0;
err_unlock:
spin_unlock_bh(&ar->beacon_lock);
err_free:
rcu_read_unlock();
dev_kfree_skb_any(skb);
return err;
}