libertas: Improvements on automatic tx power control via SIOCSIWTXPOW.

iwconfig txpower can now be used to set tx power to fixed or auto. If set to
auto the default firmware settings are used.

The command CMD_802_11_PA_CFG is only sent to older firmware, as Dan Williams
noted the command was no longer supported in firmware V9+.

Signed-off-by: Anna Neal <anna@cozybit.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 29 insertions, 2 deletions

diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index 426f1fe3bb42..e8cadad2c863 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -1820,7 +1820,21 @@ static int lbs_set_txpow(struct net_device *dev, struct iw_request_info *info,
         }
 
         if (vwrq->fixed == 0) {
-                /* Auto power control */
+                /* User requests automatic tx power control, however there are
+                 * many auto tx settings.  For now use firmware defaults until
+                 * we come up with a good way to expose these to the user. */
+                if (priv->fwrelease < 0x09000000) {
+                        ret = lbs_set_power_adapt_cfg(priv, 1,
+                                        POW_ADAPT_DEFAULT_P0,
+                                        POW_ADAPT_DEFAULT_P1,
+                                        POW_ADAPT_DEFAULT_P2);
+                        if (ret)
+                                goto out;
+                }
+                ret = lbs_set_tpc_cfg(priv, 0, TPC_DEFAULT_P0, TPC_DEFAULT_P1,
+                                TPC_DEFAULT_P2, 1);
+                if (ret)
+                        goto out;
                 dbm = priv->txpower_max;
         } else {
                 /* Userspace check in iwrange if it should use dBm or mW,
@@ -1830,7 +1844,8 @@ static int lbs_set_txpow(struct net_device *dev, struct iw_request_info *info,
                         goto out;
                 }
 
-                /* Validate requested power level against firmware allowed levels */
+                /* Validate requested power level against firmware allowed
+                 * levels */
                 if (priv->txpower_min && (dbm < priv->txpower_min)) {
                         ret = -EINVAL;
                         goto out;
@@ -1840,6 +1855,18 @@ static int lbs_set_txpow(struct net_device *dev, struct iw_request_info *info,
                         ret = -EINVAL;
                         goto out;
                 }
+                if (priv->fwrelease < 0x09000000) {
+                        ret = lbs_set_power_adapt_cfg(priv, 0,
+                                        POW_ADAPT_DEFAULT_P0,
+                                        POW_ADAPT_DEFAULT_P1,
+                                        POW_ADAPT_DEFAULT_P2);
+                        if (ret)
+                                goto out;
+                }
+                ret = lbs_set_tpc_cfg(priv, 0, TPC_DEFAULT_P0, TPC_DEFAULT_P1,
+                                TPC_DEFAULT_P2, 1);
+                if (ret)
+                        goto out;
         }
 
         /* If the radio was off, turn it on */