libertas: rate adaptation configuration via iwconfig.

Implemented rate adaptation support via 'iwconfig rate' API.  It is now
possible to specify a bit-rate value and append 'auto'.  That will configure
rate adaptation to use all bit-rates equal or lower than than selected value.

Made lbs_cmd_802_11_rate_adapt_rateset a direct command.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 18 insertions, 9 deletions

diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index d4b19f11b785..8b3ed77860b3 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -1021,29 +1021,38 @@ static int lbs_set_rate(struct net_device *dev, struct iw_request_info *info,
 
 	lbs_deb_enter(LBS_DEB_WEXT);
 	lbs_deb_wext("vwrq->value %d\n", vwrq->value);
+	lbs_deb_wext("vwrq->fixed %d\n", vwrq->fixed);
+
+	if (vwrq->fixed && vwrq->value == -1)
+		goto out;
 
 	/* Auto rate? */
-	if (vwrq->value == -1) {
-		priv->auto_rate = 1;
+	priv->enablehwauto = !vwrq->fixed;
+
+	if (vwrq->value == -1)
 		priv->cur_rate = 0;
-	} else {
+	else {
 		if (vwrq->value % 100000)
 			goto out;
 
+		new_rate = vwrq->value / 500000;
+		priv->cur_rate = new_rate;
+		/* the rest is only needed for lbs_set_data_rate() */
 		memset(rates, 0, sizeof(rates));
 		copy_active_data_rates(priv, rates);
-		new_rate = vwrq->value / 500000;
 		if (!memchr(rates, new_rate, sizeof(rates))) {
 			lbs_pr_alert("fixed data rate 0x%X out of range\n",
 				new_rate);
 			goto out;
 		}
-
-		priv->cur_rate = new_rate;
-		priv->auto_rate = 0;
 	}
 
-	ret = lbs_set_data_rate(priv, new_rate);
+	/* Try the newer command first (Firmware Spec 5.1 and above) */
+	ret = lbs_cmd_802_11_rate_adapt_rateset(priv, CMD_ACT_SET);
+
+	/* Fallback to older version */
+	if (ret)
+		ret = lbs_set_data_rate(priv, new_rate);
 
 out:
 	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
@@ -1060,7 +1069,7 @@ static int lbs_get_rate(struct net_device *dev, struct iw_request_info *info,
 	if (priv->connect_status == LBS_CONNECTED) {
 		vwrq->value = priv->cur_rate * 500000;
 
-		if (priv->auto_rate)
+		if (priv->enablehwauto)
 			vwrq->fixed = 0;
 		else
 			vwrq->fixed = 1;