Received-SPF: pass (google.com: domain of linux-wireless-owner@vger.kernel.org designates 2620:137:e000::3:4 as permitted sender) client-ip=2620:137:e000::3:4;
From:   Deren Wu <deren.wu@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>, Lorenzo Bianconi <lorenzo@kernel.org>
CC:     Sean Wang <sean.wang@mediatek.com>,
        Ryder Lee <ryder.lee@mediatek.com>,
        Shayne Chen <shayne.chen@mediatek.com>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        linux-mediatek <linux-mediatek@lists.infradead.org>,
        Deren Wu <deren.wu@mediatek.com>
Subject: [PATCH v2 13/17] wifi: mt76: mt7925: add pci.c
Date:   Wed, 13 Sep 2023 22:43:41 +0800
Message-ID: <49d8115419530fc7828911be84d7b10adeae979e.1694595134.git.deren.wu@mediatek.com>
In-Reply-To: <cover.1694595134.git.deren.wu@mediatek.com>
References: <cover.1694595134.git.deren.wu@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

(Patches split into one patch per file for easier review, but the final
commit will be one big patch. See the cover letter for more info.)

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
---
 .../net/wireless/mediatek/mt76/mt7925/pci.c   | 586 ++++++++++++++++++
 1 file changed, 586 insertions(+)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt7925/pci.c

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
new file mode 100644
index 000000000000..08ef75e24e1c
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
@@ -0,0 +1,586 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2023 MediaTek Inc. */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "mt7925.h"
+#include "mac.h"
+#include "mcu.h"
+#include "../dma.h"
+
+static const struct pci_device_id mt7925_pci_device_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7925),
+		.driver_data = (kernel_ulong_t)MT7925_FIRMWARE_WM },
+	{ PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x0717),
+		.driver_data = (kernel_ulong_t)MT7925_FIRMWARE_WM },
+	{ },
+};
+
+static bool mt7925_disable_aspm;
+module_param_named(disable_aspm, mt7925_disable_aspm, bool, 0644);
+MODULE_PARM_DESC(disable_aspm, "disable PCI ASPM support");
+
+static int mt7925e_init_reset(struct mt792x_dev *dev)
+{
+	return mt792x_wpdma_reset(dev, true);
+}
+
+static void mt7925e_unregister_device(struct mt792x_dev *dev)
+{
+	int i;
+	struct mt76_connac_pm *pm = &dev->pm;
+
+	cancel_work_sync(&dev->init_work);
+	mt76_unregister_device(&dev->mt76);
+	mt76_for_each_q_rx(&dev->mt76, i)
+		napi_disable(&dev->mt76.napi[i]);
+	cancel_delayed_work_sync(&pm->ps_work);
+	cancel_work_sync(&pm->wake_work);
+	cancel_work_sync(&dev->reset_work);
+
+	mt7925_tx_token_put(dev);
+	__mt792x_mcu_drv_pmctrl(dev);
+	mt792x_dma_cleanup(dev);
+	mt792x_wfsys_reset(dev);
+	skb_queue_purge(&dev->mt76.mcu.res_q);
+
+	tasklet_disable(&dev->mt76.irq_tasklet);
+}
+
+static void mt7925_reg_remap_restore(struct mt792x_dev *dev)
+{
+	/* remap to ori status */
+	if (unlikely(dev->backup_l1)) {
+		dev->bus_ops->wr(&dev->mt76, MT_HIF_REMAP_L1, dev->backup_l1);
+		dev->backup_l1 = 0;
+	}
+
+	if (dev->backup_l2) {
+		dev->bus_ops->wr(&dev->mt76, MT_HIF_REMAP_L2, dev->backup_l2);
+		dev->backup_l2 = 0;
+	}
+}
+
+static u32 mt7925_reg_map_l1(struct mt792x_dev *dev, u32 addr)
+{
+	u32 offset = FIELD_GET(MT_HIF_REMAP_L1_OFFSET, addr);
+	u32 base = FIELD_GET(MT_HIF_REMAP_L1_BASE, addr);
+
+	dev->backup_l1 = dev->bus_ops->rr(&dev->mt76, MT_HIF_REMAP_L1);
+
+	dev->bus_ops->rmw(&dev->mt76, MT_HIF_REMAP_L1,
+			  MT_HIF_REMAP_L1_MASK,
+			  FIELD_PREP(MT_HIF_REMAP_L1_MASK, base));
+
+	/* use read to push write */
+	dev->bus_ops->rr(&dev->mt76, MT_HIF_REMAP_L1);
+
+	return MT_HIF_REMAP_BASE_L1 + offset;
+}
+
+static u32 mt7925_reg_map_l2(struct mt792x_dev *dev, u32 addr)
+{
+	u32 base = FIELD_GET(MT_HIF_REMAP_L1_BASE, MT_HIF_REMAP_BASE_L2);
+
+	dev->backup_l2 = dev->bus_ops->rr(&dev->mt76, MT_HIF_REMAP_L1);
+
+	dev->bus_ops->rmw(&dev->mt76, MT_HIF_REMAP_L1,
+			  MT_HIF_REMAP_L1_MASK,
+			  FIELD_PREP(MT_HIF_REMAP_L1_MASK, base));
+
+	dev->bus_ops->wr(&dev->mt76, MT_HIF_REMAP_L2, addr);
+	/* use read to push write */
+	dev->bus_ops->rr(&dev->mt76, MT_HIF_REMAP_L1);
+
+	return MT_HIF_REMAP_BASE_L1;
+}
+
+static u32 __mt7925_reg_addr(struct mt792x_dev *dev, u32 addr)
+{
+	static const struct mt76_connac_reg_map fixed_map[] = {
+		{ 0x830c0000, 0x000000, 0x0001000 }, /* WF_MCU_BUS_CR_REMAP */
+		{ 0x54000000, 0x002000, 0x0001000 }, /* WFDMA PCIE0 MCU DMA0 */
+		{ 0x55000000, 0x003000, 0x0001000 }, /* WFDMA PCIE0 MCU DMA1 */
+		{ 0x56000000, 0x004000, 0x0001000 }, /* WFDMA reserved */
+		{ 0x57000000, 0x005000, 0x0001000 }, /* WFDMA MCU wrap CR */
+		{ 0x58000000, 0x006000, 0x0001000 }, /* WFDMA PCIE1 MCU DMA0 (MEM_DMA) */
+		{ 0x59000000, 0x007000, 0x0001000 }, /* WFDMA PCIE1 MCU DMA1 */
+		{ 0x820c0000, 0x008000, 0x0004000 }, /* WF_UMAC_TOP (PLE) */
+		{ 0x820c8000, 0x00c000, 0x0002000 }, /* WF_UMAC_TOP (PSE) */
+		{ 0x820cc000, 0x00e000, 0x0002000 }, /* WF_UMAC_TOP (PP) */
+		{ 0x74030000, 0x010000, 0x0001000 }, /* PCIe MAC */
+		{ 0x820e0000, 0x020000, 0x0000400 }, /* WF_LMAC_TOP BN0 (WF_CFG) */
+		{ 0x820e1000, 0x020400, 0x0000200 }, /* WF_LMAC_TOP BN0 (WF_TRB) */
+		{ 0x820e2000, 0x020800, 0x0000400 }, /* WF_LMAC_TOP BN0 (WF_AGG) */
+		{ 0x820e3000, 0x020c00, 0x0000400 }, /* WF_LMAC_TOP BN0 (WF_ARB) */
+		{ 0x820e4000, 0x021000, 0x0000400 }, /* WF_LMAC_TOP BN0 (WF_TMAC) */
+		{ 0x820e5000, 0x021400, 0x0000800 }, /* WF_LMAC_TOP BN0 (WF_RMAC) */
+		{ 0x820ce000, 0x021c00, 0x0000200 }, /* WF_LMAC_TOP (WF_SEC) */
+		{ 0x820e7000, 0x021e00, 0x0000200 }, /* WF_LMAC_TOP BN0 (WF_DMA) */
+		{ 0x820cf000, 0x022000, 0x0001000 }, /* WF_LMAC_TOP (WF_PF) */
+		{ 0x820e9000, 0x023400, 0x0000200 }, /* WF_LMAC_TOP BN0 (WF_WTBLOFF) */
+		{ 0x820ea000, 0x024000, 0x0000200 }, /* WF_LMAC_TOP BN0 (WF_ETBF) */
+		{ 0x820eb000, 0x024200, 0x0000400 }, /* WF_LMAC_TOP BN0 (WF_LPON) */
+		{ 0x820ec000, 0x024600, 0x0000200 }, /* WF_LMAC_TOP BN0 (WF_INT) */
+		{ 0x820ed000, 0x024800, 0x0000800 }, /* WF_LMAC_TOP BN0 (WF_MIB) */
+		{ 0x820ca000, 0x026000, 0x0002000 }, /* WF_LMAC_TOP BN0 (WF_MUCOP) */
+		{ 0x820d0000, 0x030000, 0x0010000 }, /* WF_LMAC_TOP (WF_WTBLON) */
+		{ 0x40000000, 0x070000, 0x0010000 }, /* WF_UMAC_SYSRAM */
+		{ 0x00400000, 0x080000, 0x0010000 }, /* WF_MCU_SYSRAM */
+		{ 0x00410000, 0x090000, 0x0010000 }, /* WF_MCU_SYSRAM (configure register) */
+		{ 0x820f0000, 0x0a0000, 0x0000400 }, /* WF_LMAC_TOP BN1 (WF_CFG) */
+		{ 0x820f1000, 0x0a0600, 0x0000200 }, /* WF_LMAC_TOP BN1 (WF_TRB) */
+		{ 0x820f2000, 0x0a0800, 0x0000400 }, /* WF_LMAC_TOP BN1 (WF_AGG) */
+		{ 0x820f3000, 0x0a0c00, 0x0000400 }, /* WF_LMAC_TOP BN1 (WF_ARB) */
+		{ 0x820f4000, 0x0a1000, 0x0000400 }, /* WF_LMAC_TOP BN1 (WF_TMAC) */
+		{ 0x820f5000, 0x0a1400, 0x0000800 }, /* WF_LMAC_TOP BN1 (WF_RMAC) */
+		{ 0x820f7000, 0x0a1e00, 0x0000200 }, /* WF_LMAC_TOP BN1 (WF_DMA) */
+		{ 0x820f9000, 0x0a3400, 0x0000200 }, /* WF_LMAC_TOP BN1 (WF_WTBLOFF) */
+		{ 0x820fa000, 0x0a4000, 0x0000200 }, /* WF_LMAC_TOP BN1 (WF_ETBF) */
+		{ 0x820fb000, 0x0a4200, 0x0000400 }, /* WF_LMAC_TOP BN1 (WF_LPON) */
+		{ 0x820fc000, 0x0a4600, 0x0000200 }, /* WF_LMAC_TOP BN1 (WF_INT) */
+		{ 0x820fd000, 0x0a4800, 0x0000800 }, /* WF_LMAC_TOP BN1 (WF_MIB) */
+		{ 0x820c4000, 0x0a8000, 0x0004000 }, /* WF_LMAC_TOP BN1 (WF_MUCOP) */
+		{ 0x820b0000, 0x0ae000, 0x0001000 }, /* [APB2] WFSYS_ON */
+		{ 0x80020000, 0x0b0000, 0x0010000 }, /* WF_TOP_MISC_OFF */
+		{ 0x81020000, 0x0c0000, 0x0010000 }, /* WF_TOP_MISC_ON */
+		{ 0x7c020000, 0x0d0000, 0x0010000 }, /* CONN_INFRA, wfdma */
+		{ 0x7c060000, 0x0e0000, 0x0010000 }, /* CONN_INFRA, conn_host_csr_top */
+		{ 0x7c000000, 0x0f0000, 0x0010000 }, /* CONN_INFRA */
+		{ 0x70020000, 0x1f0000, 0x0010000 }, /* Reserved for CBTOP, can't switch */
+		{ 0x7c500000, 0x060000, 0x2000000 }, /* remap */
+		{ 0x0, 0x0, 0x0 } /* End */
+	};
+	int i;
+
+	if (addr < 0x200000)
+		return addr;
+
+	mt7925_reg_remap_restore(dev);
+
+	for (i = 0; i < ARRAY_SIZE(fixed_map); i++) {
+		u32 ofs;
+
+		if (addr < fixed_map[i].phys)
+			continue;
+
+		ofs = addr - fixed_map[i].phys;
+		if (ofs > fixed_map[i].size)
+			continue;
+
+		return fixed_map[i].maps + ofs;
+	}
+
+	if ((addr >= 0x18000000 && addr < 0x18c00000) ||
+	    (addr >= 0x70000000 && addr < 0x78000000) ||
+	    (addr >= 0x7c000000 && addr < 0x7c400000))
+		return mt7925_reg_map_l1(dev, addr);
+
+	return mt7925_reg_map_l2(dev, addr);
+}
+
+static u32 mt7925_rr(struct mt76_dev *mdev, u32 offset)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	u32 addr = __mt7925_reg_addr(dev, offset);
+
+	return dev->bus_ops->rr(mdev, addr);
+}
+
+static void mt7925_wr(struct mt76_dev *mdev, u32 offset, u32 val)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	u32 addr = __mt7925_reg_addr(dev, offset);
+
+	dev->bus_ops->wr(mdev, addr, val);
+}
+
+static u32 mt7925_rmw(struct mt76_dev *mdev, u32 offset, u32 mask, u32 val)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	u32 addr = __mt7925_reg_addr(dev, offset);
+
+	return dev->bus_ops->rmw(mdev, addr, mask, val);
+}
+
+static int mt7925_dma_init(struct mt792x_dev *dev)
+{
+	int ret;
+
+	mt76_dma_attach(&dev->mt76);
+
+	ret = mt792x_dma_disable(dev, true);
+	if (ret)
+		return ret;
+
+	/* init tx queue */
+	ret = mt76_connac_init_tx_queues(dev->phy.mt76, MT7925_TXQ_BAND0,
+					 MT7925_TX_RING_SIZE,
+					 MT_TX_RING_BASE, 0);
+	if (ret)
+		return ret;
+
+	mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, 0x4);
+
+	/* command to WM */
+	ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM, MT7925_TXQ_MCU_WM,
+				  MT7925_TX_MCU_RING_SIZE, MT_TX_RING_BASE);
+	if (ret)
+		return ret;
+
+	/* firmware download */
+	ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_FWDL, MT7925_TXQ_FWDL,
+				  MT7925_TX_FWDL_RING_SIZE, MT_TX_RING_BASE);
+	if (ret)
+		return ret;
+
+	/* rx event */
+	ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU],
+			       MT7925_RXQ_MCU_WM, MT7925_RX_MCU_RING_SIZE,
+			       MT_RX_BUF_SIZE, MT_RX_EVENT_RING_BASE);
+	if (ret)
+		return ret;
+
+	/* rx data */
+	ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN],
+			       MT7925_RXQ_BAND0, MT7925_RX_RING_SIZE,
+			       MT_RX_BUF_SIZE, MT_RX_DATA_RING_BASE);
+	if (ret)
+		return ret;
+
+	ret = mt76_init_queues(dev, mt792x_poll_rx);
+	if (ret < 0)
+		return ret;
+
+	netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi,
+			  mt792x_poll_tx);
+	napi_enable(&dev->mt76.tx_napi);
+
+	return mt792x_dma_enable(dev);
+}
+
+static int mt7925_pci_probe(struct pci_dev *pdev,
+			    const struct pci_device_id *id)
+{
+	static const struct mt76_driver_ops drv_ops = {
+		/* txwi_size = txd size + txp size */
+		.txwi_size = MT_TXD_SIZE + sizeof(struct mt76_connac_hw_txp),
+		.drv_flags = MT_DRV_TXWI_NO_FREE | MT_DRV_HW_MGMT_TXQ |
+			     MT_DRV_AMSDU_OFFLOAD,
+		.survey_flags = SURVEY_INFO_TIME_TX |
+				SURVEY_INFO_TIME_RX |
+				SURVEY_INFO_TIME_BSS_RX,
+		.token_size = MT7925_TOKEN_SIZE,
+		.tx_prepare_skb = mt7925e_tx_prepare_skb,
+		.tx_complete_skb = mt76_connac_tx_complete_skb,
+		.rx_check = mt7925_rx_check,
+		.rx_skb = mt7925_queue_rx_skb,
+		.rx_poll_complete = mt792x_rx_poll_complete,
+		.sta_add = mt7925_mac_sta_add,
+		.sta_assoc = mt7925_mac_sta_assoc,
+		.sta_remove = mt7925_mac_sta_remove,
+		.update_survey = mt792x_update_channel,
+	};
+	static const struct mt792x_hif_ops mt7925_pcie_ops = {
+		.init_reset = mt7925e_init_reset,
+		.reset = mt7925e_mac_reset,
+		.mcu_init = mt7925e_mcu_init,
+		.drv_own = mt792xe_mcu_drv_pmctrl,
+		.fw_own = mt792xe_mcu_fw_pmctrl,
+	};
+	static const struct mt792x_irq_map irq_map = {
+		.host_irq_enable = MT_WFDMA0_HOST_INT_ENA,
+		.tx = {
+			.all_complete_mask = MT_INT_TX_DONE_ALL,
+			.mcu_complete_mask = MT_INT_TX_DONE_MCU,
+		},
+		.rx = {
+			.data_complete_mask = HOST_RX_DONE_INT_ENA2,
+			.wm_complete_mask = HOST_RX_DONE_INT_ENA0,
+		},
+	};
+	struct ieee80211_ops *ops;
+	struct mt76_bus_ops *bus_ops;
+	struct mt792x_dev *dev;
+	struct mt76_dev *mdev;
+	u8 features;
+	int ret;
+	u16 cmd;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
+	if (ret)
+		return ret;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	if (!(cmd & PCI_COMMAND_MEMORY)) {
+		cmd |= PCI_COMMAND_MEMORY;
+		pci_write_config_word(pdev, PCI_COMMAND, cmd);
+	}
+	pci_set_master(pdev);
+
+	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (ret < 0)
+		return ret;
+
+	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		goto err_free_pci_vec;
+
+	if (mt7925_disable_aspm)
+		mt76_pci_disable_aspm(pdev);
+
+	ops = mt792x_get_mac80211_ops(&pdev->dev, &mt7925_ops,
+				      (void *)id->driver_data, &features);
+	if (!ops) {
+		ret = -ENOMEM;
+		goto err_free_pci_vec;
+	}
+
+	mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), ops, &drv_ops);
+	if (!mdev) {
+		ret = -ENOMEM;
+		goto err_free_pci_vec;
+	}
+
+	pci_set_drvdata(pdev, mdev);
+
+	dev = container_of(mdev, struct mt792x_dev, mt76);
+	dev->fw_features = features;
+	dev->hif_ops = &mt7925_pcie_ops;
+	dev->irq_map = &irq_map;
+	mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]);
+	tasklet_init(&mdev->irq_tasklet, mt792x_irq_tasklet, (unsigned long)dev);
+
+	dev->phy.dev = dev;
+	dev->phy.mt76 = &dev->mt76.phy;
+	dev->mt76.phy.priv = &dev->phy;
+	dev->bus_ops = dev->mt76.bus;
+	bus_ops = devm_kmemdup(dev->mt76.dev, dev->bus_ops, sizeof(*bus_ops),
+			       GFP_KERNEL);
+	if (!bus_ops) {
+		ret = -ENOMEM;
+		goto err_free_dev;
+	}
+
+	bus_ops->rr = mt7925_rr;
+	bus_ops->wr = mt7925_wr;
+	bus_ops->rmw = mt7925_rmw;
+	dev->mt76.bus = bus_ops;
+
+	ret = __mt792x_mcu_fw_pmctrl(dev);
+	if (ret)
+		goto err_free_dev;
+
+	ret = __mt792xe_mcu_drv_pmctrl(dev);
+	if (ret)
+		goto err_free_dev;
+
+	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
+		    (mt76_rr(dev, MT_HW_REV) & 0xff);
+
+	dev_info(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
+
+	ret = mt792x_wfsys_reset(dev);
+	if (ret)
+		goto err_free_dev;
+
+	mt76_wr(dev, irq_map.host_irq_enable, 0);
+
+	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+
+	ret = devm_request_irq(mdev->dev, pdev->irq, mt792x_irq_handler,
+			       IRQF_SHARED, KBUILD_MODNAME, dev);
+	if (ret)
+		goto err_free_dev;
+
+	ret = mt7925_dma_init(dev);
+	if (ret)
+		goto err_free_irq;
+
+	ret = mt7925_register_device(dev);
+	if (ret)
+		goto err_free_irq;
+
+	return 0;
+
+err_free_irq:
+	devm_free_irq(&pdev->dev, pdev->irq, dev);
+err_free_dev:
+	mt76_free_device(&dev->mt76);
+err_free_pci_vec:
+	pci_free_irq_vectors(pdev);
+
+	return ret;
+}
+
+static void mt7925_pci_remove(struct pci_dev *pdev)
+{
+	struct mt76_dev *mdev = pci_get_drvdata(pdev);
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+
+	mt7925e_unregister_device(dev);
+	devm_free_irq(&pdev->dev, pdev->irq, dev);
+	mt76_free_device(&dev->mt76);
+	pci_free_irq_vectors(pdev);
+}
+
+static int mt7925_pci_suspend(struct device *device)
+{
+	struct pci_dev *pdev = to_pci_dev(device);
+	struct mt76_dev *mdev = pci_get_drvdata(pdev);
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	struct mt76_connac_pm *pm = &dev->pm;
+	int i, err;
+
+	pm->suspended = true;
+	flush_work(&dev->reset_work);
+	cancel_delayed_work_sync(&pm->ps_work);
+	cancel_work_sync(&pm->wake_work);
+
+	err = mt792x_mcu_drv_pmctrl(dev);
+	if (err < 0)
+		goto restore_suspend;
+
+	/* always enable deep sleep during suspend to reduce
+	 * power consumption
+	 */
+	mt7925_mcu_set_deep_sleep(dev, true);
+
+	err = mt76_connac_mcu_set_hif_suspend(mdev, true);
+	if (err)
+		goto restore_suspend;
+
+	napi_disable(&mdev->tx_napi);
+	mt76_worker_disable(&mdev->tx_worker);
+
+	mt76_for_each_q_rx(mdev, i) {
+		napi_disable(&mdev->napi[i]);
+	}
+
+	/* wait until dma is idle  */
+	mt76_poll(dev, MT_WFDMA0_GLO_CFG,
+		  MT_WFDMA0_GLO_CFG_TX_DMA_BUSY |
+		  MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000);
+
+	/* put dma disabled */
+	mt76_clear(dev, MT_WFDMA0_GLO_CFG,
+		   MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+	/* disable interrupt */
+	mt76_wr(dev, dev->irq_map->host_irq_enable, 0);
+	mt76_wr(dev, MT_WFDMA0_HOST_INT_DIS,
+		dev->irq_map->tx.all_complete_mask |
+		MT_INT_RX_DONE_ALL | MT_INT_MCU_CMD);
+
+	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
+
+	synchronize_irq(pdev->irq);
+	tasklet_kill(&mdev->irq_tasklet);
+
+	err = mt792x_mcu_fw_pmctrl(dev);
+	if (err)
+		goto restore_napi;
+
+	return 0;
+
+restore_napi:
+	mt76_for_each_q_rx(mdev, i) {
+		napi_enable(&mdev->napi[i]);
+	}
+	napi_enable(&mdev->tx_napi);
+
+	if (!pm->ds_enable)
+		mt7925_mcu_set_deep_sleep(dev, false);
+
+	mt76_connac_mcu_set_hif_suspend(mdev, false);
+
+restore_suspend:
+	pm->suspended = false;
+
+	if (err < 0)
+		mt792x_reset(&dev->mt76);
+
+	return err;
+}
+
+static int mt7925_pci_resume(struct device *device)
+{
+	struct pci_dev *pdev = to_pci_dev(device);
+	struct mt76_dev *mdev = pci_get_drvdata(pdev);
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	struct mt76_connac_pm *pm = &dev->pm;
+	int i, err;
+
+	err = mt792x_mcu_drv_pmctrl(dev);
+	if (err < 0)
+		goto failed;
+
+	mt792x_wpdma_reinit_cond(dev);
+
+	/* enable interrupt */
+	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+	mt76_connac_irq_enable(&dev->mt76,
+			       dev->irq_map->tx.all_complete_mask |
+			       MT_INT_RX_DONE_ALL | MT_INT_MCU_CMD);
+	mt76_set(dev, MT_MCU2HOST_SW_INT_ENA, MT_MCU_CMD_WAKE_RX_PCIE);
+
+	/* put dma enabled */
+	mt76_set(dev, MT_WFDMA0_GLO_CFG,
+		 MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
+
+	mt76_worker_enable(&mdev->tx_worker);
+
+	local_bh_disable();
+	mt76_for_each_q_rx(mdev, i) {
+		napi_enable(&mdev->napi[i]);
+		napi_schedule(&mdev->napi[i]);
+	}
+	napi_enable(&mdev->tx_napi);
+	napi_schedule(&mdev->tx_napi);
+	local_bh_enable();
+
+	err = mt76_connac_mcu_set_hif_suspend(mdev, false);
+
+	/* restore previous ds setting */
+	if (!pm->ds_enable)
+		mt7925_mcu_set_deep_sleep(dev, false);
+
+failed:
+	pm->suspended = false;
+
+	if (err < 0)
+		mt792x_reset(&dev->mt76);
+
+	return err;
+}
+
+static void mt7925_pci_shutdown(struct pci_dev *pdev)
+{
+	mt7925_pci_remove(pdev);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(mt7925_pm_ops, mt7925_pci_suspend, mt7925_pci_resume);
+
+static struct pci_driver mt7925_pci_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= mt7925_pci_device_table,
+	.probe		= mt7925_pci_probe,
+	.remove		= mt7925_pci_remove,
+	.shutdown       = mt7925_pci_shutdown,
+	.driver.pm	= pm_sleep_ptr(&mt7925_pm_ops),
+};
+
+module_pci_driver(mt7925_pci_driver);
+
+MODULE_DEVICE_TABLE(pci, mt7925_pci_device_table);
+MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
+MODULE_FIRMWARE(MT7925_ROM_PATCH);
+MODULE_AUTHOR("Deren Wu <deren.wu@mediatek.com>");
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.18.0