netdev - [PATCH v2 1/2] rtl8xxxu: feed antenna information for cfg80211

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Date:   Fri, 18 Mar 2022 10:42:15 +0800
From:   Chris Chiu <chris.chiu@...onical.com>
To:     kvalo@...nel.org, Jes.Sorensen@...il.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     code@...o-schneider.ch, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chris Chiu <chris.chiu@...onical.com>
Subject: [PATCH v2 1/2] rtl8xxxu: feed antenna information for cfg80211

Fill up the available TX/RX antenna so the iw commands can show
correct antenna information for different chips.

Signed-off-by: Chris Chiu <chris.chiu@...onical.com>
---
 .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 06d59ffb7444..d225a1257530 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -1607,6 +1607,7 @@ static void rtl8xxxu_print_chipinfo(struct rtl8xxxu_priv *priv)
 static int rtl8xxxu_identify_chip(struct rtl8xxxu_priv *priv)
 {
 	struct device *dev = &priv->udev->dev;
+	struct ieee80211_hw *hw = priv->hw;
 	u32 val32, bonding;
 	u16 val16;
 
@@ -1684,6 +1685,9 @@ static int rtl8xxxu_identify_chip(struct rtl8xxxu_priv *priv)
 		priv->has_wifi = 1;
 	}
 
+	hw->wiphy->available_antennas_tx = BIT(priv->tx_paths) - 1;
+	hw->wiphy->available_antennas_rx = BIT(priv->rx_paths) - 1;
+
 	switch (priv->rtl_chip) {
 	case RTL8188E:
 	case RTL8192E:
@@ -4282,6 +4286,17 @@ static void rtl8xxxu_cam_write(struct rtl8xxxu_priv *priv,
 	rtl8xxxu_debug = tmp_debug;
 }
 
+static
+int rtl8xxxu_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
+{
+	struct rtl8xxxu_priv *priv = hw->priv;
+
+	*tx_ant = BIT(priv->tx_paths) - 1;
+	*rx_ant = BIT(priv->rx_paths) - 1;
+
+	return 0;
+}
+
 static void rtl8xxxu_sw_scan_start(struct ieee80211_hw *hw,
 				   struct ieee80211_vif *vif, const u8 *mac)
 {
@@ -6472,6 +6487,7 @@ static const struct ieee80211_ops rtl8xxxu_ops = {
 	.set_key = rtl8xxxu_set_key,
 	.ampdu_action = rtl8xxxu_ampdu_action,
 	.sta_statistics = rtl8xxxu_sta_statistics,
+	.get_antenna = rtl8xxxu_get_antenna,
 };
 
 static int rtl8xxxu_parse_usb(struct rtl8xxxu_priv *priv,
-- 
2.20.1