mt76: mt7921: refactor mcu.c to be bus independent

This is a preliminary patch to introduce mt7921s support.

Make mcu.c reusable between mt7921s and mt7921e

Tested-by: Deren Wu <deren.wu@mediatek.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7921/Makefile

@@ -4,5 +4,6 @@ obj-$(CONFIG_MT7921E) += mt7921e.o
 
 CFLAGS_trace.o := -I$(src)
 
-mt7921e-y := pci.o pci_mac.o mac.o mcu.o dma.o eeprom.o main.o init.o debugfs.o trace.o
+mt7921e-y := pci.o pci_mac.o pci_mcu.o mac.o mcu.o dma.o eeprom.o main.o \
+	     init.o debugfs.o trace.o
 mt7921e-$(CONFIG_NL80211_TESTMODE) += testmode.o

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

@@ -304,6 +304,7 @@ void mt7921_unregister_device(struct mt7921_dev *dev)
 	mt7921_tx_token_put(dev);
 	mt7921_mcu_drv_pmctrl(dev);
 	mt7921_dma_cleanup(dev);
+	mt7921_wfsys_reset(dev);
 	mt7921_mcu_exit(dev);
 
 	tasklet_disable(&dev->irq_tasklet);

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

@@ -1276,12 +1276,9 @@ void mt7921_mac_reset_work(struct work_struct *work)
 	cancel_work_sync(&pm->wake_work);
 
 	mutex_lock(&dev->mt76.mutex);
-	for (i = 0; i < 10; i++) {
+	for (i = 0; i < 10; i++)
-		__mt7921_mcu_drv_pmctrl(dev);
-
 		if (!mt7921_dev_reset(dev))
 			break;
-	}
 	mutex_unlock(&dev->mt76.mutex);
 
 	if (i == 10)

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

@@ -160,9 +160,8 @@ mt7921_mcu_parse_eeprom(struct mt76_dev *dev, struct sk_buff *skb)
 	return 0;
 }
 
-static int
+int mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
-mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
+			      struct sk_buff *skb, int seq)
-			  struct sk_buff *skb, int seq)
 {
 	struct mt7921_mcu_rxd *rxd;
 	int mcu_cmd = cmd & MCU_CMD_MASK;
@@ -224,9 +223,8 @@ mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
 	return ret;
 }
 
-static int
+int mt7921_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
-mt7921_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
+			    int cmd, int *wait_seq)
-			int cmd, int *wait_seq)
 {
 	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
 	int txd_len, mcu_cmd = cmd & MCU_CMD_MASK;
@@ -590,7 +588,7 @@ int mt7921_mcu_uni_rx_ba(struct mt7921_dev *dev,
 				      enable, false);
 }
 
-static int mt7921_mcu_restart(struct mt76_dev *dev)
+int mt7921_mcu_restart(struct mt76_dev *dev)
 {
 	struct {
 		u8 power_mode;
@@ -603,20 +601,6 @@ static int mt7921_mcu_restart(struct mt76_dev *dev)
 				 sizeof(req), false);
 }
 
-static int mt7921_driver_own(struct mt7921_dev *dev)
-{
-	u32 reg = mt7921_reg_map_l1(dev, MT_TOP_LPCR_HOST_BAND0);
-
-	mt76_wr(dev, reg, MT_TOP_LPCR_HOST_DRV_OWN);
-	if (!mt76_poll_msec(dev, reg, MT_TOP_LPCR_HOST_FW_OWN,
-			    0, 500)) {
-		dev_err(dev->mt76.dev, "Timeout for driver own\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
 static u32 mt7921_get_data_mode(struct mt7921_dev *dev, u32 info)
 {
 	u32 mode = DL_MODE_NEED_RSP;
@@ -883,7 +867,6 @@ static int mt7921_load_firmware(struct mt7921_dev *dev)
 	}
 
 fw_loaded:
-	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
 
 #ifdef CONFIG_PM
 	dev->mt76.hw->wiphy->wowlan = &mt76_connac_wowlan_support;
@@ -911,10 +894,6 @@ int mt7921_run_firmware(struct mt7921_dev *dev)
 {
 	int err;
 
-	err = mt7921_driver_own(dev);
-	if (err)
-		return err;
-
 	err = mt7921_load_firmware(dev);
 	if (err)
 		return err;
@@ -925,23 +904,8 @@ int mt7921_run_firmware(struct mt7921_dev *dev)
 	return mt76_connac_mcu_get_nic_capability(&dev->mphy);
 }
 
-int mt7921_mcu_init(struct mt7921_dev *dev)
-{
-	static const struct mt76_mcu_ops mt7921_mcu_ops = {
-		.headroom = sizeof(struct mt7921_mcu_txd),
-		.mcu_skb_send_msg = mt7921_mcu_send_message,
-		.mcu_parse_response = mt7921_mcu_parse_response,
-		.mcu_restart = mt7921_mcu_restart,
-	};
-
-	dev->mt76.mcu_ops = &mt7921_mcu_ops;
-
-	return mt7921_run_firmware(dev);
-}
-
 void mt7921_mcu_exit(struct mt7921_dev *dev)
 {
-	mt7921_wfsys_reset(dev);
 	skb_queue_purge(&dev->mt76.mcu.res_q);
 }
 
@@ -1280,35 +1244,6 @@ int mt7921_mcu_sta_update(struct mt7921_dev *dev, struct ieee80211_sta *sta,
 	return mt76_connac_mcu_sta_cmd(&dev->mphy, &info);
 }
 
-int __mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev)
-{
-	struct mt76_phy *mphy = &dev->mt76.phy;
-	struct mt76_connac_pm *pm = &dev->pm;
-	int i, err = 0;
-
-	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
-		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_CLR_OWN);
-		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
-				   PCIE_LPCR_HOST_OWN_SYNC, 0, 50))
-			break;
-	}
-
-	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
-		dev_err(dev->mt76.dev, "driver own failed\n");
-		err = -EIO;
-		goto out;
-	}
-
-	mt7921_wpdma_reinit_cond(dev);
-	clear_bit(MT76_STATE_PM, &mphy->state);
-
-	pm->stats.last_wake_event = jiffies;
-	pm->stats.doze_time += pm->stats.last_wake_event -
-			       pm->stats.last_doze_event;
-out:
-	return err;
-}
-
 int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev)
 {
 	struct mt76_phy *mphy = &dev->mt76.phy;
@@ -1334,29 +1269,14 @@ int mt7921_mcu_fw_pmctrl(struct mt7921_dev *dev)
 {
 	struct mt76_phy *mphy = &dev->mt76.phy;
 	struct mt76_connac_pm *pm = &dev->pm;
-	int i, err = 0;
+	int err = 0;
 
 	mutex_lock(&pm->mutex);
 
 	if (mt76_connac_skip_fw_pmctrl(mphy, pm))
 		goto out;
 
-	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
+	err = __mt7921_mcu_fw_pmctrl(dev);
-		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_SET_OWN);
-		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
-				   PCIE_LPCR_HOST_OWN_SYNC, 4, 50))
-			break;
-	}
-
-	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
-		dev_err(dev->mt76.dev, "firmware own failed\n");
-		clear_bit(MT76_STATE_PM, &mphy->state);
-		err = -EIO;
-	}
-
-	pm->stats.last_doze_event = jiffies;
-	pm->stats.awake_time += pm->stats.last_doze_event -
-				pm->stats.last_wake_event;
 out:
 	mutex_unlock(&pm->mutex);
 

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

@@ -133,9 +133,15 @@ struct mt7921_phy {
 	struct delayed_work scan_work;
 };
 
-#define mt7921_dev_reset(dev)	((dev)->hif_ops->reset(dev))
+#define mt7921_dev_reset(dev)		((dev)->hif_ops->reset(dev))
+#define mt7921_mcu_init(dev)		((dev)->hif_ops->mcu_init(dev))
+#define __mt7921_mcu_drv_pmctrl(dev)	((dev)->hif_ops->drv_own(dev))
+#define	__mt7921_mcu_fw_pmctrl(dev)	((dev)->hif_ops->fw_own(dev))
 struct mt7921_hif_ops {
 	int (*reset)(struct mt7921_dev *dev);
+	int (*mcu_init)(struct mt7921_dev *dev);
+	int (*drv_own)(struct mt7921_dev *dev);
+	int (*fw_own)(struct mt7921_dev *dev);
 };
 
 struct mt7921_dev {
@@ -250,7 +256,6 @@ int mt7921_wpdma_reset(struct mt7921_dev *dev, bool force);
 int mt7921_wpdma_reinit_cond(struct mt7921_dev *dev);
 void mt7921_dma_cleanup(struct mt7921_dev *dev);
 int mt7921_run_firmware(struct mt7921_dev *dev);
-int mt7921_mcu_init(struct mt7921_dev *dev);
 int mt7921_mcu_add_key(struct mt7921_dev *dev, struct ieee80211_vif *vif,
 		       struct mt7921_sta *msta, struct ieee80211_key_conf *key,
 		       enum set_key_cmd cmd);
@@ -364,7 +369,6 @@ int mt7921_mcu_uni_rx_ba(struct mt7921_dev *dev,
 			 bool enable);
 void mt7921_scan_work(struct work_struct *work);
 int mt7921_mcu_uni_bss_ps(struct mt7921_dev *dev, struct ieee80211_vif *vif);
-int __mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev);
 int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev);
 int mt7921_mcu_fw_pmctrl(struct mt7921_dev *dev);
 void mt7921_pm_wake_work(struct work_struct *work);
@@ -383,7 +387,17 @@ void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
 			   bool beacon);
 void mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi);
 void mt7921_mac_sta_poll(struct mt7921_dev *dev);
+int mt7921_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
+			    int cmd, int *wait_seq);
+int mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
+			      struct sk_buff *skb, int seq);
+int mt7921_mcu_restart(struct mt76_dev *dev);
+
 void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			  struct sk_buff *skb);
 int mt7921e_mac_reset(struct mt7921_dev *dev);
+int mt7921e_mcu_init(struct mt7921_dev *dev);
+int mt7921e_mcu_drv_pmctrl(struct mt7921_dev *dev);
+int mt7921e_mcu_fw_pmctrl(struct mt7921_dev *dev);
+
 #endif

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

@@ -117,6 +117,9 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 
 	static const struct mt7921_hif_ops mt7921_pcie_ops = {
 		.reset = mt7921e_mac_reset,
+		.mcu_init = mt7921e_mcu_init,
+		.drv_own = mt7921e_mcu_drv_pmctrl,
+		.fw_own = mt7921e_mcu_fw_pmctrl,
 	};
 
 	struct mt7921_dev *dev;

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

@@ -282,6 +282,8 @@ int mt7921e_mac_reset(struct mt7921_dev *dev)
 {
 	int i, err;
 
+	mt7921e_mcu_drv_pmctrl(dev);
+
 	mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
 
 	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);

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

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2021 MediaTek Inc. */
+
+#include "mt7921.h"
+#include "mcu.h"
+
+static int mt7921e_driver_own(struct mt7921_dev *dev)
+{
+	u32 reg = mt7921_reg_map_l1(dev, MT_TOP_LPCR_HOST_BAND0);
+
+	mt76_wr(dev, reg, MT_TOP_LPCR_HOST_DRV_OWN);
+	if (!mt76_poll_msec(dev, reg, MT_TOP_LPCR_HOST_FW_OWN,
+			    0, 500)) {
+		dev_err(dev->mt76.dev, "Timeout for driver own\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+int mt7921e_mcu_init(struct mt7921_dev *dev)
+{
+	static const struct mt76_mcu_ops mt7921_mcu_ops = {
+		.headroom = sizeof(struct mt7921_mcu_txd),
+		.mcu_skb_send_msg = mt7921_mcu_send_message,
+		.mcu_parse_response = mt7921_mcu_parse_response,
+		.mcu_restart = mt7921_mcu_restart,
+	};
+	int err;
+
+	dev->mt76.mcu_ops = &mt7921_mcu_ops;
+
+	err = mt7921e_driver_own(dev);
+	if (err)
+		return err;
+
+	err = mt7921_run_firmware(dev);
+
+	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
+
+	return err;
+}
+
+int mt7921e_mcu_drv_pmctrl(struct mt7921_dev *dev)
+{
+	struct mt76_phy *mphy = &dev->mt76.phy;
+	struct mt76_connac_pm *pm = &dev->pm;
+	int i, err = 0;
+
+	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
+		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_CLR_OWN);
+		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
+				   PCIE_LPCR_HOST_OWN_SYNC, 0, 50))
+			break;
+	}
+
+	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
+		dev_err(dev->mt76.dev, "driver own failed\n");
+		err = -EIO;
+		goto out;
+	}
+
+	mt7921_wpdma_reinit_cond(dev);
+	clear_bit(MT76_STATE_PM, &mphy->state);
+
+	pm->stats.last_wake_event = jiffies;
+	pm->stats.doze_time += pm->stats.last_wake_event -
+			       pm->stats.last_doze_event;
+out:
+	return err;
+}
+
+int mt7921e_mcu_fw_pmctrl(struct mt7921_dev *dev)
+{
+	struct mt76_phy *mphy = &dev->mt76.phy;
+	struct mt76_connac_pm *pm = &dev->pm;
+	int i, err = 0;
+
+	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
+		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_SET_OWN);
+		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
+				   PCIE_LPCR_HOST_OWN_SYNC, 4, 50))
+			break;
+	}
+
+	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
+		dev_err(dev->mt76.dev, "firmware own failed\n");
+		clear_bit(MT76_STATE_PM, &mphy->state);
+		err = -EIO;
+	}
+
+	pm->stats.last_doze_event = jiffies;
+	pm->stats.awake_time += pm->stats.last_doze_event -
+				pm->stats.last_wake_event;
+
+	return err;
+}