wl1271: Increase connection reliability

This patch improves connection reliability by choosing the lowest basic
rate for null-func frames (which increases their range, as the firmware does
not do rate fall-back for null-func frames.) Also, increase the PSM entry
retry-counter.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Tested-by: Tuomas Katila <ext-tuomas.2.katila@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>

4 files changed, 28 insertions, 15 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_cmd.c b/drivers/net/wireless/wl12xx/wl1271_cmd.c
index 170b5a8bdabc..4a56ab05e736 100644
--- a/drivers/net/wireless/wl12xx/wl1271_cmd.c
+++ b/drivers/net/wireless/wl12xx/wl1271_cmd.c
@@ -408,8 +408,8 @@ int wl1271_cmd_ps_mode(struct wl1271 *wl, u8 ps_mode, u32 rates, bool send)
 
         ps_params->ps_mode = ps_mode;
         ps_params->send_null_data = send;
-        ps_params->retries = 5;
-        ps_params->hang_over_period = 1;
+        ps_params->retries = wl->conf.conn.psm_entry_nullfunc_retries;
+        ps_params->hang_over_period = wl->conf.conn.psm_entry_hangover_period;
         ps_params->null_data_rate = cpu_to_le32(rates);
 
         ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
@@ -484,7 +484,7 @@ int wl1271_cmd_build_null_data(struct wl1271 *wl)
         }
 
         ret = wl1271_cmd_template_set(wl, CMD_TEMPL_NULL_DATA, ptr, size, 0,
-                                      WL1271_RATE_AUTOMATIC);
+                                      wl->basic_rate);
 
 out:
         dev_kfree_skb(skb);
@@ -507,7 +507,7 @@ int wl1271_cmd_build_klv_null_data(struct wl1271 *wl)
         ret = wl1271_cmd_template_set(wl, CMD_TEMPL_KLV,
                                       skb->data, skb->len,
                                       CMD_TEMPL_KLV_IDX_NULL_DATA,
-                                      WL1271_RATE_AUTOMATIC);
+                                      wl->basic_rate);
 
 out:
         dev_kfree_skb(skb);
@@ -584,7 +584,7 @@ int wl1271_build_qos_null_data(struct wl1271 *wl)
 
         return wl1271_cmd_template_set(wl, CMD_TEMPL_QOS_NULL_DATA, &template,
                                        sizeof(template), 0,
-                                       WL1271_RATE_AUTOMATIC);
+                                       wl->basic_rate);
 }
 
 int wl1271_cmd_set_default_wep_key(struct wl1271 *wl, u8 id)
diff --git a/drivers/net/wireless/wl12xx/wl1271_conf.h b/drivers/net/wireless/wl12xx/wl1271_conf.h
index ab716f517553..60c50d1a9835 100644
--- a/drivers/net/wireless/wl12xx/wl1271_conf.h
+++ b/drivers/net/wireless/wl12xx/wl1271_conf.h
@@ -912,6 +912,22 @@ struct conf_conn_settings {
         u8 psm_entry_retries;
 
         /*
+         * Specifies the maximum number of times to try transmit the PSM entry
+         * null-func frame for each PSM entry attempt
+         *
+         * Range 0 - 255
+         */
+        u8 psm_entry_nullfunc_retries;
+
+        /*
+         * Specifies the time to linger in active mode after successfully
+         * transmitting the PSM entry null-func frame.
+         *
+         * Range 0 - 255 TU's
+         */
+        u8 psm_entry_hangover_period;
+
+        /*
          *
          * Specifies the interval of the connection keep-alive null-func
          * frame in ms.
diff --git a/drivers/net/wireless/wl12xx/wl1271_event.c b/drivers/net/wireless/wl12xx/wl1271_event.c
index e6c839af9038..7b3f50382963 100644
--- a/drivers/net/wireless/wl12xx/wl1271_event.c
+++ b/drivers/net/wireless/wl12xx/wl1271_event.c
@@ -96,7 +96,6 @@ static int wl1271_event_ps_report(struct wl1271 *wl,
 {
         int ret = 0;
         u32 total_retries = wl->conf.conn.psm_entry_retries;
-        u32 rates;
 
         wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
 
@@ -112,12 +111,8 @@ static int wl1271_event_ps_report(struct wl1271 *wl,
 
                 if (wl->psm_entry_retry < total_retries) {
                         wl->psm_entry_retry++;
-                        if (wl->psm_entry_retry == total_retries)
-                                rates = wl->basic_rate;
-                        else
-                                rates = wl->basic_rate_set;
                         ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
-                                                 rates, true);
+                                                 wl->basic_rate, true);
                 } else {
                         wl1271_info("No ack to nullfunc from AP.");
                         wl->psm_entry_retry = 0;
diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index b2f2d457f28c..b7e9c69f3772 100644
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -214,7 +214,9 @@ static struct conf_drv_settings default_conf = {
                 .ps_poll_recovery_period     = 700,
                 .bet_enable                  = CONF_BET_MODE_ENABLE,
                 .bet_max_consecutive         = 10,
-                .psm_entry_retries           = 3,
+                .psm_entry_retries           = 5,
+                .psm_entry_nullfunc_retries  = 3,
+                .psm_entry_hangover_period   = 1,
                 .keep_alive_interval         = 55000,
                 .max_listen_interval         = 20,
         },
@@ -1360,7 +1362,7 @@ static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
                 if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) {
                         wl1271_debug(DEBUG_PSM, "psm enabled");
                         ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
-                                                 wl->basic_rate_set, true);
+                                                 wl->basic_rate, true);
                 }
         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
                    test_bit(WL1271_FLAG_PSM_REQUESTED, &wl->flags)) {
@@ -1370,7 +1372,7 @@ static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
 
                 if (test_bit(WL1271_FLAG_PSM, &wl->flags))
                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
-                                                 wl->basic_rate_set, true);
+                                                 wl->basic_rate, true);
         }
 
         if (conf->power_level != wl->power_level) {
@@ -1846,7 +1848,7 @@ static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
                             !test_bit(WL1271_FLAG_PSM, &wl->flags)) {
                                 mode = STATION_POWER_SAVE_MODE;
                                 ret = wl1271_ps_set_mode(wl, mode,
-                                                         wl->basic_rate_set,
+                                                         wl->basic_rate,
                                                          true);
                                 if (ret < 0)
                                         goto out_sleep;