wl1271: Add TSF handling

Add functionality to pass the current TSF (mac time) to the mac80211. This is
needed for ad-hoc merging.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index 7a14da506d78..5970fde49d40 100644
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -1966,6 +1966,32 @@ out:
         return ret;
 }
 
+static u64 wl1271_op_get_tsf(struct ieee80211_hw *hw)
+{
+
+        struct wl1271 *wl = hw->priv;
+        u64 mactime = ULLONG_MAX;
+        int ret;
+
+        wl1271_debug(DEBUG_MAC80211, "mac80211 get tsf");
+
+        mutex_lock(&wl->mutex);
+
+        ret = wl1271_ps_elp_wakeup(wl, false);
+        if (ret < 0)
+                goto out;
+
+        ret = wl1271_acx_tsf_info(wl, &mactime);
+        if (ret < 0)
+                goto out_sleep;
+
+out_sleep:
+        wl1271_ps_elp_sleep(wl);
+
+out:
+        mutex_unlock(&wl->mutex);
+        return mactime;
+}
 
 /* can't be const, mac80211 writes to this */
 static struct ieee80211_rate wl1271_rates[] = {
@@ -2195,6 +2221,7 @@ static const struct ieee80211_ops wl1271_ops = {
         .bss_info_changed = wl1271_op_bss_info_changed,
         .set_rts_threshold = wl1271_op_set_rts_threshold,
         .conf_tx = wl1271_op_conf_tx,
+        .get_tsf = wl1271_op_get_tsf,
         CFG80211_TESTMODE_CMD(wl1271_tm_cmd)
 };