rtw88: 8822ce: add support for TX/RX 1ss mode

In some case, wifi chip need to be configed to be TX/RX 1ss mode.
For this mode, wifi components, such as MAC/BB/RF, need to be
specially set, and driver need to send SMPS action frame to inform AP.
Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220215004855.4098-2-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/debug.c

@@ -715,8 +715,10 @@ static int rtw_debugfs_get_phy_info(struct seq_file *m, void *v)
 	seq_printf(m, "Current CH(fc) = %u\n", rtwdev->hal.current_channel);
 	seq_printf(m, "Current BW = %u\n", rtwdev->hal.current_band_width);
 	seq_printf(m, "Current IGI = 0x%x\n", dm_info->igi_history[0]);
-	seq_printf(m, "TP {Tx, Rx} = {%u, %u}Mbps\n\n",
+	seq_printf(m, "TP {Tx, Rx} = {%u, %u}Mbps\n",
 		   stats->tx_throughput, stats->rx_throughput);
+	seq_printf(m, "1SS for TX and RX = %c\n\n", rtwdev->hal.txrx_1ss ?
+		   'Y' : 'N');
 
 	seq_puts(m, "==========[Tx Phy Info]========\n");
 	seq_puts(m, "[Tx Rate] = ");

drivers/net/wireless/realtek/rtw88/main.c

@@ -1135,7 +1135,7 @@ void rtw_update_sta_info(struct rtw_dev *rtwdev, struct rtw_sta_info *si)
 			ldpc_en = HT_LDPC_EN;
 	}
 
-	if (efuse->hw_cap.nss == 1)
+	if (efuse->hw_cap.nss == 1 || rtwdev->hal.txrx_1ss)
 		ra_mask &= RA_MASK_VHT_RATES_1SS | RA_MASK_HT_RATES_1SS;
 
 	if (hal->current_band_type == RTW_BAND_5G) {
@@ -1570,6 +1570,37 @@ static void rtw_unset_supported_band(struct ieee80211_hw *hw,
 	kfree(hw->wiphy->bands[NL80211_BAND_5GHZ]);
 }
 
+static void rtw_vif_smps_iter(void *data, u8 *mac,
+			      struct ieee80211_vif *vif)
+{
+	struct rtw_dev *rtwdev = (struct rtw_dev *)data;
+
+	if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
+		return;
+
+	if (rtwdev->hal.txrx_1ss)
+		ieee80211_request_smps(vif, IEEE80211_SMPS_STATIC);
+	else
+		ieee80211_request_smps(vif, IEEE80211_SMPS_OFF);
+}
+
+void rtw_set_txrx_1ss(struct rtw_dev *rtwdev, bool txrx_1ss)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_hal *hal = &rtwdev->hal;
+
+	if (!chip->ops->config_txrx_mode || rtwdev->hal.txrx_1ss == txrx_1ss)
+		return;
+
+	rtwdev->hal.txrx_1ss = txrx_1ss;
+	if (txrx_1ss)
+		chip->ops->config_txrx_mode(rtwdev, BB_PATH_A, BB_PATH_A, false);
+	else
+		chip->ops->config_txrx_mode(rtwdev, hal->antenna_tx,
+					    hal->antenna_rx, false);
+	rtw_iterate_vifs_atomic(rtwdev, rtw_vif_smps_iter, rtwdev);
+}
+
 static void __update_firmware_feature(struct rtw_dev *rtwdev,
 				      struct rtw_fw_state *fw)
 {

drivers/net/wireless/realtek/rtw88/main.h

@@ -874,6 +874,8 @@ struct rtw_chip_ops {
 			       enum rtw_bb_path tx_path_1ss,
 			       enum rtw_bb_path tx_path_cck,
 			       bool is_tx2_path);
+	void (*config_txrx_mode)(struct rtw_dev *rtwdev, u8 tx_path,
+				 u8 rx_path, bool is_tx2_path);
 
 	/* for coex */
 	void (*coex_set_init)(struct rtw_dev *rtwdev);
@@ -1867,6 +1869,7 @@ struct rtw_hal {
 	u32 antenna_tx;
 	u32 antenna_rx;
 	u8 bfee_sts_cap;
+	bool txrx_1ss;
 
 	/* protect tx power section */
 	struct mutex tx_power_mutex;
@@ -2123,5 +2126,5 @@ void rtw_core_fw_scan_notify(struct rtw_dev *rtwdev, bool start);
 int rtw_dump_fw(struct rtw_dev *rtwdev, const u32 ocp_src, u32 size,
 		u32 fwcd_item);
 int rtw_dump_reg(struct rtw_dev *rtwdev, const u32 addr, const u32 size);
-
+void rtw_set_txrx_1ss(struct rtw_dev *rtwdev, bool config_1ss);
 #endif

drivers/net/wireless/realtek/rtw88/rtw8822c.c

@@ -4962,6 +4962,7 @@ static struct rtw_chip_ops rtw8822c_ops = {
 	.cfo_init		= rtw8822c_cfo_init,
 	.cfo_track		= rtw8822c_cfo_track,
 	.config_tx_path		= rtw8822c_config_tx_path,
+	.config_txrx_mode	= rtw8822c_config_trx_mode,
 
 	.coex_set_init		= rtw8822c_coex_cfg_init,
 	.coex_set_ant_switch	= NULL,

drivers/net/wireless/realtek/rtw88/tx.c

@@ -353,7 +353,7 @@ static void rtw_tx_data_pkt_info_update(struct rtw_dev *rtwdev,
 
 	bw = si->bw_mode;
 	rate_id = si->rate_id;
-	stbc = si->stbc_en;
+	stbc = rtwdev->hal.txrx_1ss ? false : si->stbc_en;
 	ldpc = si->ldpc_en;
 
 out: