mt76: mt7615: introduce mt7663u support

Introduce support for mt7663u 802.11ac 2x2:2 chipset to mt7615 driver.
Main difference respect to pcie code base is the usb code needs to
configure wtbl from non-atomic context

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -285,6 +285,7 @@ enum {
 	MT76_MCU_RESET,
 	MT76_REMOVED,
 	MT76_READING_STATS,
+	MT76_STATE_POWER_OFF,
 };
 
 struct mt76_hw_cap {

drivers/net/wireless/mediatek/mt76/mt7615/Kconfig

@@ -27,3 +27,14 @@ config MT7622_WMAC
 	  This adds support for the built-in WMAC on MT7622 SoC devices
 	  which has the same feature set as a MT7615, but limited to
 	  2.4 GHz only.
+
+config MT7663U
+	tristate "MediaTek MT7663U (USB) support"
+	select MT76_USB
+	select MT7615_COMMON
+	depends on MAC80211
+	depends on USB
+	help
+	  This adds support for MT7663U 802.11ax 2x2:2 wireless devices.
+
+	  To compile this driver as a module, choose M here.

drivers/net/wireless/mediatek/mt76/mt7615/Makefile

@@ -2,6 +2,7 @@
 
 obj-$(CONFIG_MT7615_COMMON) += mt7615-common.o
 obj-$(CONFIG_MT7615E) += mt7615e.o
+obj-$(CONFIG_MT7663U) += mt7663u.o
 
 CFLAGS_trace.o := -I$(src)
 
@@ -10,3 +11,5 @@ mt7615-common-y := main.o init.o mcu.o eeprom.o mac.o \
 
 mt7615e-y := pci.o pci_init.o dma.o pci_mac.o mmio.o
 mt7615e-$(CONFIG_MT7622_WMAC) += soc.o
+
+mt7663u-y := usb.o usb_mcu.o usb_init.o

drivers/net/wireless/mediatek/mt76/mt7615/mac.c

@@ -871,6 +871,29 @@ mt7615_mac_update_rate_desc(struct mt7615_phy *phy, struct mt7615_sta *sta,
 	rd->bw = bw;
 }
 
+static int
+mt7615_mac_queue_rate_update(struct mt7615_phy *phy, struct mt7615_sta *sta,
+			     struct ieee80211_tx_rate *probe_rate,
+			     struct ieee80211_tx_rate *rates)
+{
+	struct mt7615_dev *dev = phy->dev;
+	struct mt7615_wtbl_desc *wd;
+
+	wd = kzalloc(sizeof(*wd), GFP_ATOMIC);
+	if (!wd)
+		return -ENOMEM;
+
+	wd->type = MT7615_WTBL_RATE_DESC;
+	wd->sta = sta;
+
+	mt7615_mac_update_rate_desc(phy, sta, probe_rate, rates,
+				    &wd->rate);
+	list_add_tail(&wd->node, &dev->wd_head);
+	queue_work(dev->mt76.usb.wq, &dev->wtbl_work);
+
+	return 0;
+}
+
 void mt7615_mac_set_rates(struct mt7615_phy *phy, struct mt7615_sta *sta,
 			  struct ieee80211_tx_rate *probe_rate,
 			  struct ieee80211_tx_rate *rates)
@@ -880,6 +903,11 @@ void mt7615_mac_set_rates(struct mt7615_phy *phy, struct mt7615_sta *sta,
 	struct mt7615_rate_desc rd;
 	u32 w5, w27, addr;
 
+	if (mt76_is_usb(&dev->mt76)) {
+		mt7615_mac_queue_rate_update(phy, sta, probe_rate, rates);
+		return;
+	}
+
 	if (!mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000))
 		return;
 

drivers/net/wireless/mediatek/mt76/mt7615/mac.h

@@ -165,9 +165,12 @@ enum tx_phy_bandwidth {
 #define MT_CT_INFO_NONE_CIPHER_FRAME	BIT(3)
 #define MT_CT_INFO_HSR2_TX		BIT(4)
 
-#define MT_USB_TXD_SIZE			(MT_TXD_SIZE + 8 * 4)
 #define MT_TXD_SIZE			(8 * 4)
 
+#define MT_USB_TXD_SIZE			(MT_TXD_SIZE + 8 * 4)
+#define MT_USB_HDR_SIZE			4
+#define MT_USB_TAIL_SIZE		4
+
 #define MT_TXD0_P_IDX			BIT(31)
 #define MT_TXD0_Q_IDX			GENMASK(30, 26)
 #define MT_TXD0_UDP_TCP_SUM		BIT(24)

drivers/net/wireless/mediatek/mt76/mt7615/main.c

@@ -277,6 +277,37 @@ static int mt7615_set_channel(struct mt7615_phy *phy)
 	return ret;
 }
 
+static int
+mt7615_queue_key_update(struct mt7615_dev *dev, enum set_key_cmd cmd,
+			struct mt7615_sta *msta,
+			struct ieee80211_key_conf *key)
+{
+	struct mt7615_wtbl_desc *wd;
+
+	wd = kzalloc(sizeof(*wd), GFP_KERNEL);
+	if (!wd)
+		return -ENOMEM;
+
+	wd->type = MT7615_WTBL_KEY_DESC;
+	wd->sta = msta;
+
+	wd->key.key = kzalloc(key->keylen, GFP_KERNEL);
+	if (!wd->key.key) {
+		kfree(wd);
+		return -ENOMEM;
+	}
+	memcpy(wd->key.key, key->key, key->keylen);
+	wd->key.cipher = key->cipher;
+	wd->key.keyidx = key->keyidx;
+	wd->key.keylen = key->keylen;
+	wd->key.cmd = cmd;
+
+	list_add_tail(&wd->node, &dev->wd_head);
+	queue_work(dev->mt76.usb.wq, &dev->wtbl_work);
+
+	return 0;
+}
+
 static int mt7615_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 			  struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 			  struct ieee80211_key_conf *key)
@@ -325,6 +356,9 @@ static int mt7615_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	mt76_wcid_key_setup(&dev->mt76, wcid,
 			    cmd == SET_KEY ? key : NULL);
 
+	if (mt76_is_usb(&dev->mt76))
+		return mt7615_queue_key_update(dev, cmd, msta, key);
+
 	return mt7615_mac_wtbl_set_key(dev, wcid, key, cmd);
 }
 

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -1598,8 +1598,7 @@ static int mt7615_mcu_send_firmware(struct mt7615_dev *dev, const void *data,
 	int ret = 0, cur_len;
 
 	while (len > 0) {
-		cur_len = min_t(int, 4096 - sizeof(struct mt7615_mcu_txd),
-				len);
+		cur_len = min_t(int, 4096 - dev->mt76.mcu_ops->headroom, len);
 
 		ret = __mt76_mcu_send_msg(&dev->mt76, MCU_CMD_FW_SCATTER,
 					  data, cur_len, false);

drivers/net/wireless/mediatek/mt76/mt7615/mcu.h

@@ -449,6 +449,11 @@ enum {
 	FW_STATE_CR4_RDY          = 7
 };
 
+enum {
+	FW_STATE_PWR_ON = 1,
+	FW_STATE_N9_RDY = 2,
+};
+
 #define STA_TYPE_STA		BIT(0)
 #define STA_TYPE_AP		BIT(1)
 #define STA_TYPE_ADHOC		BIT(2)

drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h

@@ -269,6 +269,9 @@ struct mt7615_dev {
 	struct idr token;
 
 	u8 fw_ver;
+
+	struct work_struct wtbl_work;
+	struct list_head wd_head;
 };
 
 enum {
@@ -508,6 +511,13 @@ int mt7615_mcu_apply_tx_dpd(struct mt7615_phy *phy);
 int mt7615_dfs_init_radar_detector(struct mt7615_phy *phy);
 
 int mt7615_init_debugfs(struct mt7615_dev *dev);
+int mt7615_mcu_wait_response(struct mt7615_dev *dev, int cmd, int seq);
+
 int __mt7663_load_firmware(struct mt7615_dev *dev);
 
+/* usb */
+void mt7663u_wtbl_work(struct work_struct *work);
+int mt7663u_mcu_init(struct mt7615_dev *dev);
+int mt7663u_register_device(struct mt7615_dev *dev);
+
 #endif

drivers/net/wireless/mediatek/mt76/mt7615/regs.h

@@ -43,6 +43,7 @@ enum mt7615_reg_base {
 #define MT_TOP_MISC2_FW_STATE		GENMASK(2, 0)
 
 #define MT7663_TOP_MISC2_FW_STATE	GENMASK(3, 1)
+#define MT_TOP_MISC2_FW_PWR_ON		BIT(1)
 
 #define MT_MCU_BASE			0x2000
 #define MT_MCU(ofs)			(MT_MCU_BASE + (ofs))
@@ -58,6 +59,8 @@ enum mt7615_reg_base {
 #define MT_PCIE_REMAP_BASE_2		((dev)->reg_map[MT_PCIE_REMAP_BASE2])
 
 #define MT_HIF(ofs)			((dev)->reg_map[MT_HIF_BASE] + (ofs))
+#define MT_HIF_RST			MT_HIF(0x100)
+#define MT_HIF_LOGIC_RST_N		BIT(4)
 
 #define MT7663_MCU_PCIE_REMAP_2_OFFSET	GENMASK(15, 0)
 #define MT7663_MCU_PCIE_REMAP_2_BASE	GENMASK(31, 16)
@@ -483,4 +486,27 @@ enum mt7615_reg_base {
 #define MT_INFRACFG_MISC		0x700
 #define MT_INFRACFG_MISC_AP2CONN_WAKE	BIT(1)
 
+#define MT_UMAC_BASE			0x7c000000
+#define MT_UMAC(ofs)			(MT_UMAC_BASE + (ofs))
+#define MT_UDMA_TX_QSEL			MT_UMAC(0x008)
+#define MT_FW_DL_EN			BIT(3)
+
+#define MT_UDMA_WLCFG_1			MT_UMAC(0x00c)
+#define MT_WL_RX_AGG_PKT_LMT		GENMASK(7, 0)
+#define MT_WL_TX_TMOUT_LMT		GENMASK(27, 8)
+
+#define MT_UDMA_WLCFG_0			MT_UMAC(0x18)
+#define MT_WL_RX_AGG_TO			GENMASK(7, 0)
+#define MT_WL_RX_AGG_LMT		GENMASK(15, 8)
+#define MT_WL_TX_TMOUT_FUNC_EN		BIT(16)
+#define MT_WL_TX_DPH_CHK_EN		BIT(17)
+#define MT_WL_RX_MPSZ_PAD0		BIT(18)
+#define MT_WL_RX_FLUSH			BIT(19)
+#define MT_TICK_1US_EN			BIT(20)
+#define MT_WL_RX_AGG_EN			BIT(21)
+#define MT_WL_RX_EN			BIT(22)
+#define MT_WL_TX_EN			BIT(23)
+#define MT_WL_RX_BUSY			BIT(30)
+#define MT_WL_TX_BUSY			BIT(31)
+
 #endif