// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>

#include "mt76x2.h"

static const struct pci_device_id mt76x2e_device_table[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7662) },
        { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7612) },
        { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7602) },
        { },
};

static int
mt76x2e_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
        static const struct mt76_driver_ops drv_ops = {
                .txwi_size = sizeof(struct mt76x02_txwi),
                .drv_flags = MT_DRV_TX_ALIGNED4_SKBS |
                             MT_DRV_SW_RX_AIRTIME |
                             MT_DRV_IGNORE_TXS_FAILED,
                .survey_flags = SURVEY_INFO_TIME_TX,
                .update_survey = mt76x02_update_channel,
                .set_channel = mt76x2e_set_channel,
                .tx_prepare_skb = mt76x02_tx_prepare_skb,
                .tx_complete_skb = mt76x02_tx_complete_skb,
                .rx_skb = mt76x02_queue_rx_skb,
                .rx_poll_complete = mt76x02_rx_poll_complete,
                .sta_ps = mt76x02_sta_ps,
                .sta_add = mt76x02_sta_add,
                .sta_remove = mt76x02_sta_remove,
        };
        struct mt76x02_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 = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
        if (ret)
                return ret;

        mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt76x2_ops,
                                 &drv_ops);
        if (!mdev)
                return -ENOMEM;

        dev = container_of(mdev, struct mt76x02_dev, mt76);
        mt76_mmio_init(mdev, pcim_iomap_table(pdev)[0]);
        mt76x2_reset_wlan(dev, false);

        mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
        dev_info(mdev->dev, "ASIC revision: %08x\n", mdev->rev);

        mt76_wr(dev, MT_INT_MASK_CSR, 0);

        ret = devm_request_irq(mdev->dev, pdev->irq, mt76x02_irq_handler,
                               IRQF_SHARED, KBUILD_MODNAME, dev);
        if (ret)
                goto error;

        ret = mt76x2_register_device(dev);
        if (ret)
                goto error;

        /* Fix up ASPM configuration */

        /* RG_SSUSB_G1_CDR_BIR_LTR = 0x9 */
        mt76_rmw_field(dev, 0x15a10, 0x1f << 16, 0x9);

        /* RG_SSUSB_G1_CDR_BIC_LTR = 0xf */
        mt76_rmw_field(dev, 0x15a0c, 0xfU << 28, 0xf);

        /* RG_SSUSB_CDR_BR_PE1D = 0x3 */
        mt76_rmw_field(dev, 0x15c58, 0x3 << 6, 0x3);

        mt76_pci_disable_aspm(pdev);

        return 0;

error:
        mt76_free_device(&dev->mt76);

        return ret;
}

static void
mt76x2e_remove(struct pci_dev *pdev)
{
        struct mt76_dev *mdev = pci_get_drvdata(pdev);
        struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);

        mt76_unregister_device(mdev);
        mt76x2_cleanup(dev);
        mt76_free_device(mdev);
}

static int __maybe_unused
mt76x2e_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct mt76_dev *mdev = pci_get_drvdata(pdev);
        int i, err;

        napi_disable(&mdev->tx_napi);
        tasklet_kill(&mdev->pre_tbtt_tasklet);
        mt76_worker_disable(&mdev->tx_worker);

        mt76_for_each_q_rx(mdev, i)
                napi_disable(&mdev->napi[i]);

        pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
        pci_save_state(pdev);
        err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
        if (err)
                goto restore;

        return 0;

restore:
        mt76_for_each_q_rx(mdev, i)
                napi_enable(&mdev->napi[i]);
        napi_enable(&mdev->tx_napi);

        return err;
}

static int __maybe_unused
mt76x2e_resume(struct pci_dev *pdev)
{
        struct mt76_dev *mdev = pci_get_drvdata(pdev);
        struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
        int i, err;

        err = pci_set_power_state(pdev, PCI_D0);
        if (err)
                return err;

        pci_restore_state(pdev);

        mt76_worker_enable(&mdev->tx_worker);

        mt76_for_each_q_rx(mdev, i) {
                napi_enable(&mdev->napi[i]);
        }
        napi_enable(&mdev->tx_napi);

        local_bh_disable();
        mt76_for_each_q_rx(mdev, i) {
                napi_schedule(&mdev->napi[i]);
        }
        napi_schedule(&mdev->tx_napi);
        local_bh_enable();

        return mt76x2_resume_device(dev);
}

MODULE_DEVICE_TABLE(pci, mt76x2e_device_table);
MODULE_FIRMWARE(MT7662_FIRMWARE);
MODULE_FIRMWARE(MT7662_ROM_PATCH);
MODULE_DESCRIPTION("MediaTek MT76x2E (PCIe) wireless driver");
MODULE_LICENSE("Dual BSD/GPL");

static struct pci_driver mt76pci_driver = {
        .name           = KBUILD_MODNAME,
        .id_table       = mt76x2e_device_table,
        .probe          = mt76x2e_probe,
        .remove         = mt76x2e_remove,
#ifdef CONFIG_PM
        .suspend        = mt76x2e_suspend,
        .resume         = mt76x2e_resume,
#endif /* CONFIG_PM */
};

module_pci_driver(mt76pci_driver);