mwifiex: Add module parameter for regdomain

Allow a regulatory domain country code to be specified at boot
using a module argument.  This overrides the firmware regulatory
mode.

This patch also enables uAP to operate in 11a mode with hostapd.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Paul Stewart <pstew@chromium.org>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 25 insertions, 4 deletions

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 856aea25052b..ef5fa890a286 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -20,6 +20,9 @@
 #include "cfg80211.h"
 #include "main.h"
 
+static char *reg_alpha2;
+module_param(reg_alpha2, charp, 0);
+
 static const struct ieee80211_iface_limit mwifiex_ap_sta_limits[] = {
         {
                 .max = 2, .types = BIT(NL80211_IFTYPE_STATION),
@@ -2485,6 +2488,17 @@ static const struct wiphy_wowlan_support mwifiex_wowlan_support = {
 };
 #endif
 
+static bool mwifiex_is_valid_alpha2(const char *alpha2)
+{
+        if (!alpha2 || strlen(alpha2) != 2)
+                return false;
+
+        if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
+                return true;
+
+        return false;
+}
+
 /*
  * This function registers the device with CFG802.11 subsystem.
  *
@@ -2537,6 +2551,7 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
                         WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD |
                         WIPHY_FLAG_AP_UAPSD |
                         WIPHY_FLAG_CUSTOM_REGULATORY |
+                        WIPHY_FLAG_STRICT_REGULATORY |
                         WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 
         wiphy_apply_custom_regulatory(wiphy, &mwifiex_world_regdom_custom);
@@ -2574,10 +2589,16 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
                 wiphy_free(wiphy);
                 return ret;
         }
-        country_code = mwifiex_11d_code_2_region(priv->adapter->region_code);
-        if (country_code)
-                dev_info(adapter->dev,
-                         "ignoring F/W country code %2.2s\n", country_code);
+
+        if (reg_alpha2 && mwifiex_is_valid_alpha2(reg_alpha2)) {
+                wiphy_info(wiphy, "driver hint alpha2: %2.2s\n", reg_alpha2);
+                regulatory_hint(wiphy, reg_alpha2);
+        } else {
+                country_code = mwifiex_11d_code_2_region(adapter->region_code);
+                if (country_code)
+                        wiphy_info(wiphy, "ignoring F/W country code %2.2s\n",
+                                   country_code);
+        }
 
         adapter->wiphy = wiphy;
         return ret;