mt76: mt7915: add support for MT7986

This adds MT7986 SoC integrated multi-band 4x4 WiFi 6/6E.

Co-developed-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Co-developed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Bo Jiao <Bo.Jiao@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac.h

@@ -117,6 +117,11 @@ static inline bool is_mt7916(struct mt76_dev *dev)
 	return mt76_chip(dev) == 0x7906;
 }
 
+static inline bool is_mt7986(struct mt76_dev *dev)
+{
+	return mt76_chip(dev) == 0x7986;
+}
+
 static inline bool is_mt7622(struct mt76_dev *dev)
 {
 	if (!IS_ENABLED(CONFIG_MT7622_WMAC))

drivers/net/wireless/mediatek/mt76/mt7915/Kconfig

@@ -12,3 +12,13 @@ config MT7915E
 	  OFDMA, spatial reuse and dual carrier modulation.
 
 	  To compile this driver as a module, choose M here.
+
+config MT7986_WMAC
+	bool "MT7986 (SoC) WMAC support"
+	depends on MT7915E
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	select REGMAP
+	help
+	  This adds support for the built-in WMAC on MT7986 SoC device
+	  which has the same feature set as a MT7915, but enables 6E
+	  support.

drivers/net/wireless/mediatek/mt76/mt7915/Makefile

@@ -6,3 +6,4 @@ mt7915e-y := pci.o init.o dma.o eeprom.o main.o mcu.o mac.o \
 	     debugfs.o mmio.o
 
 mt7915e-$(CONFIG_NL80211_TESTMODE) += testmode.o
+mt7915e-$(CONFIG_MT7986_WMAC) += soc.o

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c

@@ -36,27 +36,48 @@ static int mt7915_check_eeprom(struct mt7915_dev *dev)
 	switch (val) {
 	case 0x7915:
 	case 0x7916:
+	case 0x7986:
 		return 0;
 	default:
 		return -EINVAL;
 	}
 }
 
+static char *mt7915_eeprom_name(struct mt7915_dev *dev)
+{
+	switch (mt76_chip(&dev->mt76)) {
+	case 0x7915:
+		return dev->dbdc_support ?
+		       MT7915_EEPROM_DEFAULT_DBDC : MT7915_EEPROM_DEFAULT;
+	case 0x7986:
+		switch (mt7915_check_adie(dev, true)) {
+		case MT7976_ONE_ADIE_DBDC:
+			return MT7986_EEPROM_MT7976_DEFAULT_DBDC;
+		case MT7975_ONE_ADIE:
+			return MT7986_EEPROM_MT7975_DEFAULT;
+		case MT7976_ONE_ADIE:
+			return MT7986_EEPROM_MT7976_DEFAULT;
+		case MT7975_DUAL_ADIE:
+			return MT7986_EEPROM_MT7975_DUAL_DEFAULT;
+		case MT7976_DUAL_ADIE:
+			return MT7986_EEPROM_MT7976_DUAL_DEFAULT;
+		default:
+			break;
+		}
+		return NULL;
+	default:
+		return MT7916_EEPROM_DEFAULT;
+	}
+}
+
 static int
 mt7915_eeprom_load_default(struct mt7915_dev *dev)
 {
-	char *default_bin = MT7915_EEPROM_DEFAULT;
 	u8 *eeprom = dev->mt76.eeprom.data;
 	const struct firmware *fw = NULL;
 	int ret;
 
-	if (dev->dbdc_support)
-		default_bin = MT7915_EEPROM_DEFAULT_DBDC;
-
-	if (!is_mt7915(&dev->mt76))
-		default_bin = MT7916_EEPROM_DEFAULT;
-
-	ret = request_firmware(&fw, default_bin, dev->mt76.dev);
+	ret = request_firmware(&fw, mt7915_eeprom_name(dev), dev->mt76.dev);
 	if (ret)
 		return ret;
 
@@ -135,7 +156,7 @@ static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
 void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
 				struct mt7915_phy *phy)
 {
-	u8 nss, nss_band, *eeprom = dev->mt76.eeprom.data;
+	u8 nss, nss_band, nss_band_max, *eeprom = dev->mt76.eeprom.data;
 	struct mt76_phy *mphy = phy->mt76;
 	bool ext_phy = phy != &dev->phy;
 
@@ -155,6 +176,7 @@ void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
 
 	/* read tx/rx stream */
 	nss_band = nss;
+
 	if (dev->dbdc_support) {
 		if (is_mt7915(&dev->mt76)) {
 			nss_band = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
@@ -167,20 +189,29 @@ void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
 					     eeprom[MT_EE_WIFI_CONF + 2 + ext_phy]);
 		}
 
-		if (!nss_band || nss_band > 2)
-			nss_band = 2;
+		nss_band_max = is_mt7986(&dev->mt76) ?
+			       MT_EE_NSS_MAX_DBDC_MA7986 : MT_EE_NSS_MAX_DBDC_MA7915;
+	} else {
+		nss_band_max = is_mt7986(&dev->mt76) ?
+			       MT_EE_NSS_MAX_MA7986 : MT_EE_NSS_MAX_MA7915;
 	}
 
+	if (!nss_band || nss_band > nss_band_max)
+		nss_band = nss_band_max;
+
 	if (nss_band > nss) {
-		dev_err(dev->mt76.dev,
-			"nss mismatch, nss(%d) nss_band(%d) ext_phy(%d)\n",
-			nss, nss_band, ext_phy);
+		dev_warn(dev->mt76.dev,
+			 "nss mismatch, nss(%d) nss_band(%d) ext_phy(%d)\n",
+			 nss, nss_band, ext_phy);
 		nss = nss_band;
 	}
 
-	mphy->chainmask = ext_phy ? (BIT(nss_band) - 1) << 2 : (BIT(nss_band) - 1);
-	mphy->antenna_mask = BIT(hweight8(mphy->chainmask)) - 1;
+	mphy->chainmask = BIT(nss) - 1;
+	if (ext_phy)
+		mphy->chainmask <<= dev->chainshift;
+	mphy->antenna_mask = BIT(nss_band) - 1;
 	dev->chainmask |= mphy->chainmask;
+	dev->chainshift = hweight8(dev->mphy.chainmask);
 }
 
 int mt7915_eeprom_init(struct mt7915_dev *dev)
@@ -226,7 +257,7 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 
 	if (chan->band == NL80211_BAND_2GHZ) {
 		u32 power = is_mt7915(&dev->mt76) ?
-			MT_EE_TX0_POWER_2G : MT_EE_TX0_POWER_2G_V2;
+			    MT_EE_TX0_POWER_2G : MT_EE_TX0_POWER_2G_V2;
 
 		index = power + chain_idx * 3;
 		target_power = eeprom[index];
@@ -236,7 +267,7 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 	} else {
 		int group = mt7915_get_channel_group(chan->hw_value);
 		u32 power = is_mt7915(&dev->mt76) ?
-			MT_EE_TX0_POWER_5G : MT_EE_TX0_POWER_5G_V2;
+			    MT_EE_TX0_POWER_5G : MT_EE_TX0_POWER_5G_V2;
 
 		index = power + chain_idx * 12;
 		target_power = eeprom[index + group];
@@ -256,10 +287,10 @@ s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
 	u32 rate_2g, rate_5g;
 
 	rate_2g = is_mt7915(&dev->mt76) ?
-		MT_EE_RATE_DELTA_2G : MT_EE_RATE_DELTA_2G_V2;
+		  MT_EE_RATE_DELTA_2G : MT_EE_RATE_DELTA_2G_V2;
 
 	rate_5g = is_mt7915(&dev->mt76) ?
-		MT_EE_RATE_DELTA_5G : MT_EE_RATE_DELTA_5G_V2;
+		  MT_EE_RATE_DELTA_5G : MT_EE_RATE_DELTA_5G_V2;
 
 	if (band == NL80211_BAND_2GHZ)
 		val = eeprom[rate_2g];

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h

@@ -56,6 +56,19 @@ enum mt7915_eeprom_field {
 #define MT_EE_RATE_DELTA_SIGN			BIT(6)
 #define MT_EE_RATE_DELTA_EN			BIT(7)
 
+#define MT_EE_NSS_MAX_MA7915			4
+#define MT_EE_NSS_MAX_DBDC_MA7915		2
+#define MT_EE_NSS_MAX_MA7986			4
+#define MT_EE_NSS_MAX_DBDC_MA7986		4
+
+enum mt7915_adie_sku {
+	MT7976_ONE_ADIE_DBDC = 0x7,
+	MT7975_ONE_ADIE	= 0x8,
+	MT7976_ONE_ADIE	= 0xa,
+	MT7975_DUAL_ADIE = 0xd,
+	MT7976_DUAL_ADIE = 0xf,
+};
+
 enum mt7915_eeprom_band {
 	MT_EE_BAND_SEL_DEFAULT,
 	MT_EE_BAND_SEL_5GHZ,

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -582,6 +582,12 @@ static void mt7915_wfsys_reset(struct mt7915_dev *dev)
 		mt76_clear(dev, MT_TOP_MISC, MT_TOP_MISC_FW_STATE);
 
 		msleep(100);
+	} else if (is_mt7986(&dev->mt76)) {
+		mt7986_wmac_enable(dev);
+		msleep(20);
+
+		mt7986_wmac_disable(dev);
+		msleep(20);
 	} else {
 		mt76_set(dev, MT_WF_SUBSYS_RST, 0x1);
 		msleep(20);
@@ -767,18 +773,25 @@ static int
 mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 		    struct ieee80211_sband_iftype_data *data)
 {
+	struct mt7915_dev *dev = phy->dev;
 	int i, idx = 0, nss = hweight8(phy->mt76->chainmask);
 	u16 mcs_map = 0;
 	u16 mcs_map_160 = 0;
+	u8 nss_160;
+
+	/* Can do 1/2 of NSS streams in 160Mhz mode for mt7915 */
+	if (is_mt7915(&dev->mt76) && !dev->dbdc_support)
+		nss_160 = nss / 2;
+	else
+		nss_160 = nss;
 
 	for (i = 0; i < 8; i++) {
 		if (i < nss)
 			mcs_map |= (IEEE80211_HE_MCS_SUPPORT_0_11 << (i * 2));
 		else
 			mcs_map |= (IEEE80211_HE_MCS_NOT_SUPPORTED << (i * 2));
 
-		/* Can do 1/2 of NSS streams in 160Mhz mode. */
-		if (i < nss / 2)
+		if (i < nss_160)
 			mcs_map_160 |= (IEEE80211_HE_MCS_SUPPORT_0_11 << (i * 2));
 		else
 			mcs_map_160 |= (IEEE80211_HE_MCS_NOT_SUPPORTED << (i * 2));
@@ -1011,5 +1024,8 @@ void mt7915_unregister_device(struct mt7915_dev *dev)
 	mt7915_dma_cleanup(dev);
 	tasklet_disable(&dev->irq_tasklet);
 
+	if (is_mt7986(&dev->mt76))
+		mt7986_wmac_disable(dev);
+
 	mt76_free_device(&dev->mt76);
 }

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -1971,16 +1971,22 @@ mt7915_dma_reset(struct mt7915_dev *dev)
 	int i;
 
 	mt76_clear(dev, MT_WFDMA0_GLO_CFG,
-		   MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
-	mt76_clear(dev, MT_WFDMA1_GLO_CFG,
-		   MT_WFDMA1_GLO_CFG_TX_DMA_EN | MT_WFDMA1_GLO_CFG_RX_DMA_EN);
+		   MT_WFDMA0_GLO_CFG_TX_DMA_EN |
+		   MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+	if (is_mt7915(&dev->mt76))
+		mt76_clear(dev, MT_WFDMA1_GLO_CFG,
+			   MT_WFDMA1_GLO_CFG_TX_DMA_EN |
+			   MT_WFDMA1_GLO_CFG_RX_DMA_EN);
 	if (dev->hif2) {
 		mt76_clear(dev, MT_WFDMA0_GLO_CFG + hif1_ofs,
-			   (MT_WFDMA0_GLO_CFG_TX_DMA_EN |
-			    MT_WFDMA0_GLO_CFG_RX_DMA_EN));
-		mt76_clear(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
-			   (MT_WFDMA1_GLO_CFG_TX_DMA_EN |
-			    MT_WFDMA1_GLO_CFG_RX_DMA_EN));
+			   MT_WFDMA0_GLO_CFG_TX_DMA_EN |
+			   MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+		if (is_mt7915(&dev->mt76))
+			mt76_clear(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
+				   MT_WFDMA1_GLO_CFG_TX_DMA_EN |
+				   MT_WFDMA1_GLO_CFG_RX_DMA_EN);
 	}
 
 	usleep_range(1000, 2000);
@@ -2004,19 +2010,23 @@ mt7915_dma_reset(struct mt7915_dev *dev)
 
 	mt76_set(dev, MT_WFDMA0_GLO_CFG,
 		 MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
-	mt76_set(dev, MT_WFDMA1_GLO_CFG,
-		 MT_WFDMA1_GLO_CFG_TX_DMA_EN | MT_WFDMA1_GLO_CFG_RX_DMA_EN |
-		 MT_WFDMA1_GLO_CFG_OMIT_TX_INFO |
-		 MT_WFDMA1_GLO_CFG_OMIT_RX_INFO);
-	if (dev->hif2) {
-		mt76_set(dev, MT_WFDMA0_GLO_CFG + hif1_ofs,
-			(MT_WFDMA0_GLO_CFG_TX_DMA_EN |
-			 MT_WFDMA0_GLO_CFG_RX_DMA_EN));
-		mt76_set(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
-			(MT_WFDMA1_GLO_CFG_TX_DMA_EN |
+	if (is_mt7915(&dev->mt76))
+		mt76_set(dev, MT_WFDMA1_GLO_CFG,
+			 MT_WFDMA1_GLO_CFG_TX_DMA_EN |
 			 MT_WFDMA1_GLO_CFG_RX_DMA_EN |
 			 MT_WFDMA1_GLO_CFG_OMIT_TX_INFO |
-			 MT_WFDMA1_GLO_CFG_OMIT_RX_INFO));
+			 MT_WFDMA1_GLO_CFG_OMIT_RX_INFO);
+	if (dev->hif2) {
+		mt76_set(dev, MT_WFDMA0_GLO_CFG + hif1_ofs,
+			 MT_WFDMA0_GLO_CFG_TX_DMA_EN |
+			 MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+		if (is_mt7915(&dev->mt76))
+			mt76_set(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
+				 MT_WFDMA1_GLO_CFG_TX_DMA_EN |
+				 MT_WFDMA1_GLO_CFG_RX_DMA_EN |
+				 MT_WFDMA1_GLO_CFG_OMIT_TX_INFO |
+				 MT_WFDMA1_GLO_CFG_OMIT_RX_INFO);
 	}
 }
 

drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -969,12 +969,9 @@ mt7915_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
 
 	phy->mt76->antenna_mask = tx_ant;
 
-	if (ext_phy) {
-		if (dev->chainmask == 0xf)
-			tx_ant <<= 2;
-		else
-			tx_ant <<= 1;
-	}
+	if (ext_phy)
+		tx_ant <<= dev->chainshift;
+
 	phy->mt76->chainmask = tx_ant;
 
 	mt76_set_stream_caps(phy->mt76, true);