linux-kernel - [PATCH 2/2] mt76: mt7615: add set

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Date:   Sun, 15 Dec 2019 11:56:32 +0800
From:   Ryder Lee <ryder.lee@...iatek.com>
To:     Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
CC:     Roy Luo <royluo@...gle.com>, <linux-wireless@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Ryder Lee <ryder.lee@...iatek.com>,
        Shayne Chen <shayne.chen@...iatek.com>
Subject: [PATCH 2/2] mt76: mt7615: add set_antenna callback

Add a set_antenna callback to setup per phy tx/rx streams.

Signed-off-by: Shayne Chen <shayne.chen@...iatek.com>
Signed-off-by: Ryder Lee <ryder.lee@...iatek.com>
---
 .../net/wireless/mediatek/mt76/mt7615/main.c  | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index 759a66997c6f..70791544a088 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -48,6 +48,8 @@ static int mt7615_start(struct ieee80211_hw *hw)
 		mt7615_mcu_set_mac_enable(dev, 1, true);
 	}
 
+	mt7615_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
+
 	set_bit(MT76_STATE_RUNNING, &phy->mt76->state);
 
 	if (running)
@@ -635,6 +637,33 @@ mt7615_set_coverage_class(struct ieee80211_hw *hw, s16 coverage_class)
 	mt7615_mac_set_timing(phy);
 }
 
+static int
+mt7615_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
+{
+	struct mt7615_dev *dev = mt7615_hw_dev(hw);
+	struct mt7615_phy *phy = mt7615_hw_phy(hw);
+	int max_nss = hweight8(hw->wiphy->available_antennas_tx);
+	bool ext_phy = phy != &dev->phy;
+
+	if (!tx_ant || tx_ant != rx_ant || ffs(tx_ant) > max_nss)
+		return -EINVAL;
+
+	if ((BIT(hweight8(tx_ant)) - 1) != tx_ant)
+		tx_ant = BIT(ffs(tx_ant) - 1) - 1;
+
+	mutex_lock(&dev->mt76.mutex);
+
+	phy->mt76->antenna_mask = tx_ant;
+	phy->chainmask = ext_phy ? tx_ant << 2 : tx_ant;
+
+	mt76_set_stream_caps(&dev->mt76, true);
+	mt7615_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
+
+	mutex_unlock(&dev->mt76.mutex);
+
+	return 0;
+}
+
 const struct ieee80211_ops mt7615_ops = {
 	.tx = mt7615_tx,
 	.start = mt7615_start,
@@ -659,5 +688,6 @@ const struct ieee80211_ops mt7615_ops = {
 	.channel_switch_beacon = mt7615_channel_switch_beacon,
 	.get_survey = mt76_get_survey,
 	.get_antenna = mt76_get_antenna,
+	.set_antenna = mt7615_set_antenna,
 	.set_coverage_class = mt7615_set_coverage_class,
 };
-- 
2.18.0