// SPDX-License-Identifier: GPL-2.0+
// PCI interface driver for Loongson SPI Support
// Copyright (C) 2023 Loongson Technology Corporation Limited

#include <linux/mod_devicetable.h>
#include <linux/pci.h>

#include "spi-loongson.h"

static int loongson_spi_pci_register(struct pci_dev *pdev,
                        const struct pci_device_id *ent)
{
        int ret;
        void __iomem *reg_base;
        struct device *dev = &pdev->dev;
        int pci_bar = 0;

        ret = pcim_enable_device(pdev);
        if (ret < 0)
                return dev_err_probe(dev, ret, "cannot enable pci device\n");

        reg_base = pcim_iomap_region(pdev, pci_bar, pci_name(pdev));
        ret = PTR_ERR_OR_ZERO(reg_base);
        if (ret)
                return dev_err_probe(dev, ret, "failed to request and remap memory\n");

        ret = loongson_spi_init_controller(dev, reg_base);
        if (ret)
                return dev_err_probe(dev, ret, "failed to initialize controller\n");

        return 0;
}

static struct pci_device_id loongson_spi_devices[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a0b) },
        { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a1b) },
        { }
};
MODULE_DEVICE_TABLE(pci, loongson_spi_devices);

static struct pci_driver loongson_spi_pci_driver = {
        .name       = "loongson-spi-pci",
        .id_table   = loongson_spi_devices,
        .probe      = loongson_spi_pci_register,
        .driver = {
                .bus = &pci_bus_type,
                .pm = &loongson_spi_dev_pm_ops,
        },
};
module_pci_driver(loongson_spi_pci_driver);

MODULE_DESCRIPTION("Loongson spi pci driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("SPI_LOONGSON_CORE");