cfg80211: move txpower wext from mac80211

This patch introduces new cfg80211 API to set the TX power
via cfg80211, puts the wext code into cfg80211 and updates
mac80211 to use all that. The -ENETDOWN bits are a hack but
will go away soon.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d2fc18c1ae0..81258acf48b 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1334,6 +1334,58 @@ static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
         return 0;
 }
 
+static int ieee80211_set_tx_power(struct wiphy *wiphy,
+                                  enum tx_power_setting type, int dbm)
+{
+        struct ieee80211_local *local = wiphy_priv(wiphy);
+        struct ieee80211_channel *chan = local->hw.conf.channel;
+        u32 changes = 0;
+        bool radio_enabled = true;
+
+        switch (type) {
+        case TX_POWER_AUTOMATIC:
+                local->user_power_level = -1;
+                break;
+        case TX_POWER_LIMITED:
+                if (dbm < 0)
+                        return -EINVAL;
+                local->user_power_level = dbm;
+                break;
+        case TX_POWER_FIXED:
+                if (dbm < 0)
+                        return -EINVAL;
+                /* TODO: move to cfg80211 when it knows the channel */
+                if (dbm > chan->max_power)
+                        return -EINVAL;
+                local->user_power_level = dbm;
+                break;
+        case TX_POWER_OFF:
+                radio_enabled = false;
+                break;
+        }
+
+        if (radio_enabled != local->hw.conf.radio_enabled) {
+                changes |= IEEE80211_CONF_CHANGE_RADIO_ENABLED;
+                local->hw.conf.radio_enabled = radio_enabled;
+        }
+
+        ieee80211_hw_config(local, changes);
+
+        return 0;
+}
+
+static int ieee80211_get_tx_power(struct wiphy *wiphy, int *dbm)
+{
+        struct ieee80211_local *local = wiphy_priv(wiphy);
+
+        *dbm = local->hw.conf.power_level;
+
+        if (!local->hw.conf.radio_enabled)
+                return -ENETDOWN;
+
+        return 0;
+}
+
 struct cfg80211_ops mac80211_config_ops = {
         .add_virtual_intf = ieee80211_add_iface,
         .del_virtual_intf = ieee80211_del_iface,
@@ -1373,4 +1425,6 @@ struct cfg80211_ops mac80211_config_ops = {
         .join_ibss = ieee80211_join_ibss,
         .leave_ibss = ieee80211_leave_ibss,
         .set_wiphy_params = ieee80211_set_wiphy_params,
+        .set_tx_power = ieee80211_set_tx_power,
+        .get_tx_power = ieee80211_get_tx_power,
 };