wifi: mt76: mt7925: add rfkill_poll for hardware rfkill

Add mac80211 rfkill_poll ops to monitor hardware rfkill state
and state change will be updated.

Signed-off-by: Allan Wang <allan.wang@mediatek.com>
Link: https://patch.msgid.link/20250507053131.4173691-1-allan.wang@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Author: Allan Wang

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h

@@ -1306,6 +1306,7 @@ enum {
 	MCU_UNI_CMD_PER_STA_INFO = 0x6d,
 	MCU_UNI_CMD_ALL_STA_INFO = 0x6e,
 	MCU_UNI_CMD_ASSERT_DUMP = 0x6f,
+	MCU_UNI_CMD_RADIO_STATUS = 0x80,
 	MCU_UNI_CMD_SDO = 0x88,
 };
 

drivers/net/wireless/mediatek/mt76/mt7925/main.c

@@ -334,6 +334,9 @@ int __mt7925_start(struct mt792x_phy *phy)
 	ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
 				     MT792x_WATCHDOG_TIME);
 
+	if (phy->chip_cap & MT792x_CHIP_CAP_WF_RF_PIN_CTRL_EVT_EN)
+		wiphy_rfkill_start_polling(mphy->hw->wiphy);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__mt7925_start);
@@ -2205,6 +2208,18 @@ static void mt7925_unassign_vif_chanctx(struct ieee80211_hw *hw,
 	mutex_unlock(&dev->mt76.mutex);
 }
 
+static void mt7925_rfkill_poll(struct ieee80211_hw *hw)
+{
+	struct mt792x_phy *phy = mt792x_hw_phy(hw);
+	int ret;
+
+	mt792x_mutex_acquire(phy->dev);
+	ret = mt7925_mcu_wf_rf_pin_ctrl(phy);
+	mt792x_mutex_release(phy->dev);
+
+	wiphy_rfkill_set_hw_state(hw->wiphy, ret == 0);
+}
+
 const struct ieee80211_ops mt7925_ops = {
 	.tx = mt792x_tx,
 	.start = mt7925_start,
@@ -2267,6 +2282,7 @@ const struct ieee80211_ops mt7925_ops = {
 	.link_info_changed = mt7925_link_info_changed,
 	.change_vif_links = mt7925_change_vif_links,
 	.change_sta_links = mt7925_change_sta_links,
+	.rfkill_poll = mt7925_rfkill_poll,
 };
 EXPORT_SYMBOL_GPL(mt7925_ops);
 

drivers/net/wireless/mediatek/mt76/mt7925/mcu.c

@@ -3682,6 +3682,43 @@ int mt7925_mcu_set_rate_txpower(struct mt76_phy *phy)
 	return 0;
 }
 
+int mt7925_mcu_wf_rf_pin_ctrl(struct mt792x_phy *phy)
+{
+#define UNI_CMD_RADIO_STATUS_GET	0
+	struct mt792x_dev *dev = phy->dev;
+	struct sk_buff *skb;
+	int ret;
+	struct {
+		__le16 tag;
+		__le16 len;
+		u8 rsv[4];
+	} __packed req = {
+		.tag = UNI_CMD_RADIO_STATUS_GET,
+		.len = cpu_to_le16(sizeof(req)),
+	};
+	struct mt7925_radio_status_event {
+		__le16 tag;
+		__le16 len;
+
+		u8 data;
+		u8 rsv[3];
+	} __packed *status;
+
+	ret = mt76_mcu_send_and_get_msg(&dev->mt76,
+					MCU_UNI_CMD(RADIO_STATUS),
+					&req, sizeof(req), true, &skb);
+	if (ret)
+		return ret;
+
+	skb_pull(skb, sizeof(struct tlv));
+	status = (struct mt7925_radio_status_event *)skb->data;
+	ret = status->data;
+
+	dev_kfree_skb(skb);
+
+	return ret;
+}
+
 int mt7925_mcu_set_rxfilter(struct mt792x_dev *dev, u32 fif,
 			    u8 bit_op, u32 bit_map)
 {

drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h

@@ -365,6 +365,7 @@ int mt7925_mcu_wtbl_update_hdr_trans(struct mt792x_dev *dev,
 				     struct ieee80211_vif *vif,
 				     struct ieee80211_sta *sta,
 				     int link_id);
+int mt7925_mcu_wf_rf_pin_ctrl(struct mt792x_phy *phy);
 
 int mt7925_testmode_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			void *data, int len);

drivers/net/wireless/mediatek/mt76/mt7925/pci.c

@@ -31,6 +31,10 @@ static void mt7925e_unregister_device(struct mt792x_dev *dev)
 {
 	int i;
 	struct mt76_connac_pm *pm = &dev->pm;
+	struct ieee80211_hw *hw = mt76_hw(dev);
+
+	if (dev->phy.chip_cap & MT792x_CHIP_CAP_WF_RF_PIN_CTRL_EVT_EN)
+		wiphy_rfkill_stop_polling(hw->wiphy);
 
 	cancel_work_sync(&dev->init_work);
 	mt76_unregister_device(&dev->mt76);