rtlwifi: Add rtl_get_hal_edca_param() to generate register's format of EDCA.

Convert from the value of ieee80211_tx_queue_params to Realtek's
register value.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -1557,6 +1557,42 @@ void rtl_wait_tx_report_acked(struct ieee80211_hw *hw, u32 wait_ms)
 			 "Wait 1ms (%d/%d) to disable key.\n", i, wait_ms);
 	}
 }
+
+u32 rtl_get_hal_edca_param(struct ieee80211_hw *hw,
+			   struct ieee80211_vif *vif,
+			   enum wireless_mode wirelessmode,
+			   struct ieee80211_tx_queue_params *param)
+{
+	u32 reg = 0;
+	u8 sifstime = 10;
+	u8 slottime = 20;
+
+	/* AIFS = AIFSN * slot time + SIFS */
+	switch (wirelessmode) {
+	case WIRELESS_MODE_A:
+	case WIRELESS_MODE_N_24G:
+	case WIRELESS_MODE_N_5G:
+	case WIRELESS_MODE_AC_5G:
+	case WIRELESS_MODE_AC_24G:
+		sifstime = 16;
+		slottime = 9;
+		break;
+	case WIRELESS_MODE_G:
+		slottime = (vif->bss_conf.use_short_slot ? 9 : 20);
+		break;
+	default:
+		break;
+	}
+
+	reg |= (param->txop & 0x7FF) << 16;
+	reg |= (fls(param->cw_max) & 0xF) << 12;
+	reg |= (fls(param->cw_min) & 0xF) << 8;
+	reg |= (param->aifs & 0x0F) * slottime + sifstime;
+
+	return reg;
+}
+EXPORT_SYMBOL_GPL(rtl_get_hal_edca_param);
+
 /*********************************************************
  *
  * functions called by core.c

drivers/net/wireless/realtek/rtlwifi/base.h

@@ -137,6 +137,10 @@ void rtl_tx_report_handler(struct ieee80211_hw *hw, u8 *tmp_buf,
 			   u8 c2h_cmd_len);
 bool rtl_check_tx_report_acked(struct ieee80211_hw *hw);
 void rtl_wait_tx_report_acked(struct ieee80211_hw *hw, u32 wait_ms);
+u32 rtl_get_hal_edca_param(struct ieee80211_hw *hw,
+			   struct ieee80211_vif *vif,
+			   enum wireless_mode wirelessmode,
+			   struct ieee80211_tx_queue_params *param);
 
 void rtl_beacon_statistic(struct ieee80211_hw *hw, struct sk_buff *skb);
 void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb);