ath6kl: add support for changing contry code

To make it possible to change the country code from user space via nl80211
add handler for reg_notifier. The feature is only enabled when built
time option CONFIG_ATH6KL_REGDOMAIN is enabled, which again depends on
CFG80211_CERTIFICATION_ONUS for certication purposes.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/Kconfig b/drivers/net/wireless/ath/ath6kl/Kconfig
index d755a5e..26c4b72 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/Kconfig
+++ b/drivers/net/wireless/ath/ath6kl/Kconfig
@@ -30,3 +30,12 @@ config ATH6KL_DEBUG
        depends on ATH6KL
        ---help---
          Enables debug support
+
+config ATH6KL_REGDOMAIN
+       bool "Atheros ath6kl regdomain support"
+       depends on ATH6KL
+       depends on CFG80211_CERTIFICATION_ONUS
+       ---help---
+         Enabling this makes it possible to change the regdomain in
+         the firmware. This can be only enabled if regulatory requirements
+         are taken into account.

diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 4f538f0..f620af5 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -3458,6 +3458,49 @@ void ath6kl_cfg80211_stop_all(struct ath6kl *ar)
                ath6kl_cfg80211_stop(vif);
 }
 
+static int ath6kl_cfg80211_reg_notify(struct wiphy *wiphy,
+                                     struct regulatory_request *request)
+{
+       struct ath6kl *ar = wiphy_priv(wiphy);
+       u32 rates[IEEE80211_NUM_BANDS];
+       int ret, i;
+
+       ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
+                  "cfg reg_notify %c%c%s%s initiator %d\n",
+                  request->alpha2[0], request->alpha2[1],
+                  request->intersect ? " intersect" : "",
+                  request->processed ? " processed" : "",
+                  request->initiator);
+
+       ret = ath6kl_wmi_set_regdomain_cmd(ar->wmi, request->alpha2);
+       if (ret) {
+               ath6kl_err("failed to set regdomain: %d\n", ret);
+               return ret;
+       }
+
+       /*
+        * Firmware will apply the regdomain change only after a scan is
+        * issued and it will send a WMI_REGDOMAIN_EVENTID when it has been
+        * changed.
+        */
+
+       for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+               if (wiphy->bands[i])
+                       rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
+
+
+       ret = ath6kl_wmi_beginscan_cmd(ar->wmi, 0, WMI_LONG_SCAN, false,
+                                      false, 0, ATH6KL_FG_SCAN_INTERVAL,
+                                      0, NULL, false, rates);
+       if (ret) {
+               ath6kl_err("failed to start scan for a regdomain change: %d\n",
+                          ret);
+               return ret;
+       }
+
+       return 0;
+}
+
 static int ath6kl_cfg80211_vif_init(struct ath6kl_vif *vif)
 {
        vif->aggr_cntxt = aggr_init(vif);
@@ -3590,6 +3633,10 @@ int ath6kl_cfg80211_init(struct ath6kl *ar)
                                          BIT(NL80211_IFTYPE_P2P_CLIENT);
        }
 
+       if (config_enabled(CONFIG_ATH6KL_REGDOMAIN) &&
+           test_bit(ATH6KL_FW_CAPABILITY_REGDOMAIN, ar->fw_capabilities))
+               wiphy->reg_notifier = ath6kl_cfg80211_reg_notify;
+
        /* max num of ssids that can be probed during scanning */
        wiphy->max_scan_ssids = MAX_PROBED_SSIDS;
 

diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index a754a15..eb86b31 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -124,6 +124,9 @@ enum ath6kl_fw_capability {
        /* Firmware supports TX error rate notification */
        ATH6KL_FW_CAPABILITY_TX_ERR_NOTIFY,
 
+       /* supports WMI_SET_REGDOMAIN_CMDID command */
+       ATH6KL_FW_CAPABILITY_REGDOMAIN,
+
        /* this needs to be last */
        ATH6KL_FW_CAPABILITY_MAX,
 };

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index 05cc871..cf91348 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -3216,6 +3216,23 @@ int ath6kl_wmi_sta_bmiss_enhance_cmd(struct wmi *wmi, u8 if_idx, bool enhance)
        return ret;
 }
 
+int ath6kl_wmi_set_regdomain_cmd(struct wmi *wmi, const char *alpha2)
+{
+       struct sk_buff *skb;
+       struct wmi_set_regdomain_cmd *cmd;
+
+       skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
+       if (!skb)
+               return -ENOMEM;
+
+       cmd = (struct wmi_set_regdomain_cmd *) skb->data;
+       memcpy(cmd->iso_name, alpha2, 2);
+
+       return ath6kl_wmi_cmd_send(wmi, 0, skb,
+                                  WMI_SET_REGDOMAIN_CMDID,
+                                  NO_SYNC_WMIFLAG);
+}
+
 s32 ath6kl_wmi_get_rate(s8 rate_index)
 {
        if (rate_index == RATE_AUTO)

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 5166a8e..1d510ba 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1042,6 +1042,11 @@ struct wmi_sta_bmiss_enhance_cmd {
        u8 enable;
 } __packed;
 
+struct wmi_set_regdomain_cmd {
+       u8 length;
+       u8 iso_name[2];
+} __packed;
+
 /* WMI_SET_POWER_MODE_CMDID */
 enum wmi_power_mode {
        REC_POWER = 0x01,
@@ -2640,6 +2645,7 @@ int ath6kl_wmi_add_del_mcast_filter_cmd(struct wmi *wmi, u8 if_idx,
 int ath6kl_wmi_sta_bmiss_enhance_cmd(struct wmi *wmi, u8 if_idx, bool enable);
 int ath6kl_wmi_set_txe_notify(struct wmi *wmi, u8 idx,
                              u32 rate, u32 pkts, u32 intvl);
+int ath6kl_wmi_set_regdomain_cmd(struct wmi *wmi, const char *alpha2);
 
 /* AP mode uAPSD */
 int ath6kl_wmi_ap_set_apsd(struct wmi *wmi, u8 if_idx, u8 enable);