// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Synopsys DesignWare Multimedia Card PCI Interface driver
 *
 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
 */

#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include "dw_mmc.h"

#define PCI_BAR_NO 2
#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
/* Defining the Capabilities */
#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
                                MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
                                MMC_CAP_SDIO_IRQ)

static struct dw_mci_board pci_board_data = {
        .caps                           = DW_MCI_CAPABILITIES,
        .bus_hz                         = 33 * 1000 * 1000,
        .detect_delay_ms                = 200,
        .fifo_depth                     = 32,
};

static int dw_mci_pci_probe(struct pci_dev *pdev,
                            const struct pci_device_id *entries)
{
        struct dw_mci *host;
        int ret;

        ret = pcim_enable_device(pdev);
        if (ret)
                return ret;

        host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
        if (!host)
                return -ENOMEM;

        host->irq = pdev->irq;
        host->irq_flags = IRQF_SHARED;
        host->dev = &pdev->dev;
        host->pdata = &pci_board_data;

        ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
        if (ret)
                return ret;

        host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];

        pci_set_master(pdev);

        ret = dw_mci_probe(host);
        if (ret)
                return ret;

        pci_set_drvdata(pdev, host);

        return 0;
}

static void dw_mci_pci_remove(struct pci_dev *pdev)
{
        struct dw_mci *host = pci_get_drvdata(pdev);

        dw_mci_remove(host);
}

static const struct dev_pm_ops dw_mci_pci_dev_pm_ops = {
        SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
        RUNTIME_PM_OPS(dw_mci_runtime_suspend, dw_mci_runtime_resume, NULL)
};

static const struct pci_device_id dw_mci_pci_id[] = {
        { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
        {}
};
MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);

static struct pci_driver dw_mci_pci_driver = {
        .name           = "dw_mmc_pci",
        .id_table       = dw_mci_pci_id,
        .probe          = dw_mci_pci_probe,
        .remove         = dw_mci_pci_remove,
        .driver         =       {
                .pm =   pm_ptr(&dw_mci_pci_dev_pm_ops),
        },
};

module_pci_driver(dw_mci_pci_driver);

MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
MODULE_LICENSE("GPL v2");