LXR linux/drivers/ata/ahci

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * AHCI SATA platform driver
   4 *
   5 * Copyright 2004-2005  Red Hat, Inc.
   6 *   Jeff Garzik <jgarzik@pobox.com>
   7 * Copyright 2010  MontaVista Software, LLC.
   8 *   Anton Vorontsov <avorontsov@ru.mvista.com>
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/module.h>
  13#include <linux/pm.h>
  14#include <linux/device.h>
  15#include <linux/of_device.h>
  16#include <linux/platform_device.h>
  17#include <linux/libata.h>
  18#include <linux/ahci_platform.h>
  19#include <linux/acpi.h>
  20#include <linux/pci_ids.h>
  21#include "ahci.h"
  22
  23#define DRV_NAME "ahci"
  24
  25static const struct ata_port_info ahci_port_info = {
  26        .flags          = AHCI_FLAG_COMMON,
  27        .pio_mask       = ATA_PIO4,
  28        .udma_mask      = ATA_UDMA6,
  29        .port_ops       = &ahci_platform_ops,
  30};
  31
  32static const struct ata_port_info ahci_port_info_nolpm = {
  33        .flags          = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
  34        .pio_mask       = ATA_PIO4,
  35        .udma_mask      = ATA_UDMA6,
  36        .port_ops       = &ahci_platform_ops,
  37};
  38
  39static struct scsi_host_template ahci_platform_sht = {
  40        AHCI_SHT(DRV_NAME),
  41};
  42
  43static int ahci_probe(struct platform_device *pdev)
  44{
  45        struct device *dev = &pdev->dev;
  46        struct ahci_host_priv *hpriv;
  47        const struct ata_port_info *port;
  48        int rc;
  49
  50        hpriv = ahci_platform_get_resources(pdev,
  51                                            AHCI_PLATFORM_GET_RESETS);
  52        if (IS_ERR(hpriv))
  53                return PTR_ERR(hpriv);
  54
  55        rc = ahci_platform_enable_resources(hpriv);
  56        if (rc)
  57                return rc;
  58
  59        of_property_read_u32(dev->of_node,
  60                             "ports-implemented", &hpriv->force_port_map);
  61
  62        if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  63                hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  64
  65        port = acpi_device_get_match_data(dev);
  66        if (!port)
  67                port = &ahci_port_info;
  68
  69        rc = ahci_platform_init_host(pdev, hpriv, port,
  70                                     &ahci_platform_sht);
  71        if (rc)
  72                goto disable_resources;
  73
  74        return 0;
  75disable_resources:
  76        ahci_platform_disable_resources(hpriv);
  77        return rc;
  78}
  79
  80static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  81                         ahci_platform_resume);
  82
  83static const struct of_device_id ahci_of_match[] = {
  84        { .compatible = "generic-ahci", },
  85        /* Keep the following compatibles for device tree compatibility */
  86        { .compatible = "snps,spear-ahci", },
  87        { .compatible = "ibm,476gtr-ahci", },
  88        { .compatible = "snps,dwc-ahci", },
  89        { .compatible = "hisilicon,hisi-ahci", },
  90        { .compatible = "cavium,octeon-7130-ahci", },
  91        {},
  92};
  93MODULE_DEVICE_TABLE(of, ahci_of_match);
  94
  95static const struct acpi_device_id ahci_acpi_match[] = {
  96        { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
  97        { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
  98        {},
  99};
 100MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
 101
 102static struct platform_driver ahci_driver = {
 103        .probe = ahci_probe,
 104        .remove = ata_platform_remove_one,
 105        .shutdown = ahci_platform_shutdown,
 106        .driver = {
 107                .name = DRV_NAME,
 108                .of_match_table = ahci_of_match,
 109                .acpi_match_table = ahci_acpi_match,
 110                .pm = &ahci_pm_ops,
 111        },
 112};
 113module_platform_driver(ahci_driver);
 114
 115MODULE_DESCRIPTION("AHCI SATA platform driver");
 116MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 117MODULE_LICENSE("GPL");
 118MODULE_ALIAS("platform:ahci");
 119