// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AHCI SATA platform driver
 *
 * Copyright 2004-2005  Red Hat, Inc.
 *   Jeff Garzik <jgarzik@pobox.com>
 * Copyright 2010  MontaVista Software, LLC.
 *   Anton Vorontsov <avorontsov@ru.mvista.com>
 */

#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
#include <linux/pci_ids.h>
#include "ahci.h"

#define DRV_NAME "ahci"

static const struct ata_port_info ahci_port_info = {
        .flags          = AHCI_FLAG_COMMON,
        .pio_mask       = ATA_PIO4,
        .udma_mask      = ATA_UDMA6,
        .port_ops       = &ahci_platform_ops,
};

static const struct ata_port_info ahci_port_info_nolpm = {
        .flags          = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
        .pio_mask       = ATA_PIO4,
        .udma_mask      = ATA_UDMA6,
        .port_ops       = &ahci_platform_ops,
};

static const struct scsi_host_template ahci_platform_sht = {
        AHCI_SHT(DRV_NAME),
};

static int ahci_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        struct ahci_host_priv *hpriv;
        const struct ata_port_info *port;
        int rc;

        hpriv = ahci_platform_get_resources(pdev,
                                            AHCI_PLATFORM_GET_RESETS);
        if (IS_ERR(hpriv))
                return PTR_ERR(hpriv);

        rc = ahci_platform_enable_resources(hpriv);
        if (rc)
                return rc;

        if (device_is_compatible(dev, "hisilicon,hisi-ahci"))
                hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;

        port = device_get_match_data(dev);
        if (!port)
                port = &ahci_port_info;

        rc = ahci_platform_init_host(pdev, hpriv, port,
                                     &ahci_platform_sht);
        if (rc)
                goto disable_resources;

        return 0;
disable_resources:
        ahci_platform_disable_resources(hpriv);
        return rc;
}

static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
                         ahci_platform_resume);

static const struct of_device_id ahci_of_match[] = {
        { .compatible = "generic-ahci", },
        /* Keep the following compatibles for device tree compatibility */
        { .compatible = "ibm,476gtr-ahci", },
        { .compatible = "hisilicon,hisi-ahci", },
        { .compatible = "cavium,octeon-7130-ahci", },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ahci_of_match);

static const struct acpi_device_id ahci_acpi_match[] = {
        { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
        { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
        {},
};
MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);

static struct platform_driver ahci_driver = {
        .probe = ahci_probe,
        .remove = ata_platform_remove_one,
        .shutdown = ahci_platform_shutdown,
        .driver = {
                .name = DRV_NAME,
                .of_match_table = ahci_of_match,
                .acpi_match_table = ahci_acpi_match,
                .pm = &ahci_pm_ops,
        },
};
module_platform_driver(ahci_driver);

MODULE_DESCRIPTION("AHCI SATA platform driver");
MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ahci");