mt76: mt7921: introduce mt7921e support

Introduce support for mt7921e 802.11ax (Wi-Fi 6) 2x2:2SS chipset.

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

1 files changed, 184 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
new file mode 100644
index 000000000000..6808bc749583
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "mt7921.h"
+#include "mac.h"
+#include "../trace.h"
+
+static const struct pci_device_id mt7921_pci_device_table[] = {
+	{ PCI_DEVICE(0x14c3, 0x7961) },
+	{ },
+};
+
+static void
+mt7921_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
+{
+	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
+
+	if (q == MT_RXQ_MAIN)
+		mt7921_irq_enable(dev, MT_INT_RX_DONE_DATA);
+	else if (q == MT_RXQ_MCU_WA)
+		mt7921_irq_enable(dev, MT_INT_RX_DONE_WM2);
+	else
+		mt7921_irq_enable(dev, MT_INT_RX_DONE_WM);
+}
+
+static irqreturn_t mt7921_irq_handler(int irq, void *dev_instance)
+{
+	struct mt7921_dev *dev = dev_instance;
+
+	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
+
+	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
+		return IRQ_NONE;
+
+	tasklet_schedule(&dev->irq_tasklet);
+
+	return IRQ_HANDLED;
+}
+
+static void mt7921_irq_tasklet(unsigned long data)
+{
+	struct mt7921_dev *dev = (struct mt7921_dev *)data;
+	u32 intr, mask = 0;
+
+	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
+
+	intr = mt76_rr(dev, MT_WFDMA0_HOST_INT_STA);
+	intr &= dev->mt76.mmio.irqmask;
+	mt76_wr(dev, MT_WFDMA0_HOST_INT_STA, intr);
+
+	trace_dev_irq(&dev->mt76, intr, dev->mt76.mmio.irqmask);
+
+	mask |= intr & MT_INT_RX_DONE_ALL;
+	if (intr & MT_INT_TX_DONE_MCU)
+		mask |= MT_INT_TX_DONE_MCU;
+
+	mt76_set_irq_mask(&dev->mt76, MT_WFDMA0_HOST_INT_ENA, mask, 0);
+
+	if (intr & MT_INT_TX_DONE_ALL)
+		napi_schedule(&dev->mt76.tx_napi);
+
+	if (intr & MT_INT_RX_DONE_WM)
+		napi_schedule(&dev->mt76.napi[MT_RXQ_MCU]);
+
+	if (intr & MT_INT_RX_DONE_WM2)
+		napi_schedule(&dev->mt76.napi[MT_RXQ_MCU_WA]);
+
+	if (intr & MT_INT_RX_DONE_DATA)
+		napi_schedule(&dev->mt76.napi[MT_RXQ_MAIN]);
+}
+
+static int mt7921_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 mt7921_txp_common),
+		.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,
+		.tx_prepare_skb = mt7921_tx_prepare_skb,
+		.tx_complete_skb = mt7921_tx_complete_skb,
+		.rx_skb = mt7921_queue_rx_skb,
+		.rx_poll_complete = mt7921_rx_poll_complete,
+		.sta_ps = mt7921_sta_ps,
+		.sta_add = mt7921_mac_sta_add,
+		.sta_remove = mt7921_mac_sta_remove,
+		.update_survey = mt7921_update_channel,
+	};
+	struct mt7921_dev *dev;
+	struct mt76_dev *mdev;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
+	if (ret)
+		return ret;
+
+	pci_set_master(pdev);
+
+	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY);
+	if (ret < 0)
+		return ret;
+
+	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+	if (ret)
+		goto err_free_pci_vec;
+
+	mt76_pci_disable_aspm(pdev);
+
+	mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt7921_ops,
+				 &drv_ops);
+	if (!mdev) {
+		ret = -ENOMEM;
+		goto err_free_pci_vec;
+	}
+
+	dev = container_of(mdev, struct mt7921_dev, mt76);
+
+	mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]);
+	tasklet_init(&dev->irq_tasklet, mt7921_irq_tasklet, (unsigned long)dev);
+	mdev->rev = (mt7921_l1_rr(dev, MT_HW_CHIPID) << 16) |
+		    (mt7921_l1_rr(dev, MT_HW_REV) & 0xff);
+	dev_err(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
+
+	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
+
+	mt7921_l1_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+
+	ret = devm_request_irq(mdev->dev, pdev->irq, mt7921_irq_handler,
+			       IRQF_SHARED, KBUILD_MODNAME, dev);
+	if (ret)
+		goto err_free_dev;
+
+	ret = mt7921_register_device(dev);
+	if (ret)
+		goto err_free_dev;
+
+	return 0;
+
+err_free_dev:
+	mt76_free_device(&dev->mt76);
+err_free_pci_vec:
+	pci_free_irq_vectors(pdev);
+
+	return ret;
+}
+
+static void mt7921_pci_remove(struct pci_dev *pdev)
+{
+	struct mt76_dev *mdev = pci_get_drvdata(pdev);
+	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
+
+	mt7921_unregister_device(dev);
+	devm_free_irq(&pdev->dev, pdev->irq, dev);
+	pci_free_irq_vectors(pdev);
+}
+
+struct pci_driver mt7921_pci_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= mt7921_pci_device_table,
+	.probe		= mt7921_pci_probe,
+	.remove		= mt7921_pci_remove,
+};
+
+module_pci_driver(mt7921_pci_driver);
+
+MODULE_DEVICE_TABLE(pci, mt7921_pci_device_table);
+MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
+MODULE_FIRMWARE(MT7921_ROM_PATCH);
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
+MODULE_LICENSE("Dual BSD/GPL");