wifi: mt76: mt7921: get regulatory information from the clc event

The clc event can report the radio configuration for the corresponding
country and the driver would take it as regulatory information of a
certain platform device.

This patch would change the clc commnad from no-waiting to waiting for
event. For backward compatible, we also add a new nic capability tag
to indicate the firmware did support this new clc event from now on.
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -1355,6 +1355,7 @@ enum {
 	MT_NIC_CAP_ANTSWP = 0x16,
 	MT_NIC_CAP_WFDMA_REALLOC,
 	MT_NIC_CAP_6G,
+	MT_NIC_CAP_CHIP_CAP = 0x20,
 };
 
 #define UNI_WOW_DETECT_TYPE_MAGIC		BIT(0)

drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

@@ -557,6 +557,9 @@ static int mt7921_mcu_get_nic_capability(struct mt792x_phy *mphy)
 				mt7921_mcu_parse_tx_resource(phy->dev,
 							     skb);
 			break;
+		case MT_NIC_CAP_CHIP_CAP:
+			memcpy(&mphy->chip_cap, (void *)skb->data, sizeof(u64));
+			break;
 		default:
 			break;
 		}
@@ -1243,7 +1246,8 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 			 struct mt7921_clc *clc,
 			 u8 idx)
 {
-	struct sk_buff *skb;
+#define CLC_CAP_EVT_EN BIT(0)
+	struct sk_buff *skb, *ret_skb = NULL;
 	struct {
 		u8 ver;
 		u8 pad0;
@@ -1251,7 +1255,7 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 		u8 idx;
 		u8 env;
 		u8 acpi_conf;
-		u8 pad1;
+		u8 cap;
 		u8 alpha2[2];
 		u8 type[2];
 		u8 env_6g;
@@ -1268,6 +1272,9 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 	if (!clc)
 		return 0;
 
+	if (dev->phy.chip_cap & MT792x_CHIP_CAP_CLC_EVT_EN)
+		req.cap |= CLC_CAP_EVT_EN;
+
 	pos = clc->data;
 	for (i = 0; i < clc->nr_country; i++) {
 		struct mt7921_clc_rule *rule = (struct mt7921_clc_rule *)pos;
@@ -1289,10 +1296,21 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 			return -ENOMEM;
 		skb_put_data(skb, rule->data, len);
 
-		ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
-					    MCU_CE_CMD(SET_CLC), false);
+		ret = mt76_mcu_skb_send_and_get_msg(&dev->mt76, skb,
+						    MCU_CE_CMD(SET_CLC),
+						    !!(req.cap & CLC_CAP_EVT_EN),
+						    &ret_skb);
 		if (ret < 0)
 			return ret;
+
+		if (ret_skb) {
+			struct mt7921_clc_info_tlv *info;
+
+			info = (struct mt7921_clc_info_tlv *)(ret_skb->data + 4);
+			dev->phy.clc_chan_conf = info->chan_conf;
+			dev_kfree_skb(ret_skb);
+		}
+
 		valid_cnt++;
 	}
 

drivers/net/wireless/mediatek/mt76/mt7921/mcu.h

@@ -99,4 +99,17 @@ struct mt7921_rftest_evt {
 	__le32 param0;
 	__le32 param1;
 } __packed;
+
+struct mt7921_clc_info_tlv {
+	__le16 tag;
+	__le16 len;
+
+	u8 chan_conf; /* BIT(0) : Enable UNII-4
+		       * BIT(1) : Enable UNII-5
+		       * BIT(2) : Enable UNII-6
+		       * BIT(3) : Enable UNII-7
+		       * BIT(4) : Enable UNII-8
+		       */
+	u8 rsv[63];
+} __packed;
 #endif

drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h

@@ -24,6 +24,7 @@
 #define MT7921_SKU_TABLE_SIZE		(MT7921_SKU_RATE_NUM + 1)
 
 #define MCU_UNI_EVENT_ROC  0x27
+#define MCU_UNI_EVENT_CLC  0x80
 
 enum {
 	UNI_ROC_ACQUIRE,

drivers/net/wireless/mediatek/mt76/mt792x.h

@@ -25,6 +25,8 @@
 #define MT792x_FW_TAG_FEATURE	4
 #define MT792x_FW_CAP_CNM	BIT(7)
 
+#define MT792x_CHIP_CAP_CLC_EVT_EN BIT(0)
+
 /* NOTE: used to map mt76_rates. idx may change if firmware expands table */
 #define MT792x_BASIC_RATES_TBL	11
 
@@ -125,6 +127,7 @@ struct mt792x_phy {
 	struct mt76_mib_stats mib;
 
 	u8 sta_work_count;
+	u8 clc_chan_conf;
 	enum mt792x_reg_power_type power_type;
 
 	struct sk_buff_head scan_event_list;
@@ -133,6 +136,7 @@ struct mt792x_phy {
 	void *acpisar;
 #endif
 	void *clc[MT792x_CLC_MAX_NUM];
+	u64 chip_cap;
 
 	struct work_struct roc_work;
 	struct timer_list roc_timer;