LXR linux/drivers/ata/ahci

   1/*
   2 * AHCI SATA platform driver
   3 *
   4 * Copyright 2004-2005  Red Hat, Inc.
   5 *   Jeff Garzik <jgarzik@pobox.com>
   6 * Copyright 2010  MontaVista Software, LLC.
   7 *   Anton Vorontsov <avorontsov@ru.mvista.com>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2, or (at your option)
  12 * any later version.
  13 */
  14
  15#include <linux/kernel.h>
  16#include <linux/module.h>
  17#include <linux/pm.h>
  18#include <linux/device.h>
  19#include <linux/of_device.h>
  20#include <linux/platform_device.h>
  21#include <linux/libata.h>
  22#include <linux/ahci_platform.h>
  23#include <linux/acpi.h>
  24#include <linux/pci_ids.h>
  25#include "ahci.h"
  26
  27#define DRV_NAME "ahci"
  28
  29static const struct ata_port_info ahci_port_info = {
  30        .flags          = AHCI_FLAG_COMMON,
  31        .pio_mask       = ATA_PIO4,
  32        .udma_mask      = ATA_UDMA6,
  33        .port_ops       = &ahci_platform_ops,
  34};
  35
  36static const struct ata_port_info ahci_port_info_nolpm = {
  37        .flags          = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
  38        .pio_mask       = ATA_PIO4,
  39        .udma_mask      = ATA_UDMA6,
  40        .port_ops       = &ahci_platform_ops,
  41};
  42
  43static struct scsi_host_template ahci_platform_sht = {
  44        AHCI_SHT(DRV_NAME),
  45};
  46
  47static int ahci_probe(struct platform_device *pdev)
  48{
  49        struct device *dev = &pdev->dev;
  50        struct ahci_host_priv *hpriv;
  51        const struct ata_port_info *port;
  52        int rc;
  53
  54        hpriv = ahci_platform_get_resources(pdev);
  55        if (IS_ERR(hpriv))
  56                return PTR_ERR(hpriv);
  57
  58        rc = ahci_platform_enable_resources(hpriv);
  59        if (rc)
  60                return rc;
  61
  62        of_property_read_u32(dev->of_node,
  63                             "ports-implemented", &hpriv->force_port_map);
  64
  65        if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  66                hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  67
  68        port = acpi_device_get_match_data(dev);
  69        if (!port)
  70                port = &ahci_port_info;
  71
  72        rc = ahci_platform_init_host(pdev, hpriv, port,
  73                                     &ahci_platform_sht);
  74        if (rc)
  75                goto disable_resources;
  76
  77        return 0;
  78disable_resources:
  79        ahci_platform_disable_resources(hpriv);
  80        return rc;
  81}
  82
  83static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  84                         ahci_platform_resume);
  85
  86static const struct of_device_id ahci_of_match[] = {
  87        { .compatible = "generic-ahci", },
  88        /* Keep the following compatibles for device tree compatibility */
  89        { .compatible = "snps,spear-ahci", },
  90        { .compatible = "snps,exynos5440-ahci", },
  91        { .compatible = "ibm,476gtr-ahci", },
  92        { .compatible = "snps,dwc-ahci", },
  93        { .compatible = "hisilicon,hisi-ahci", },
  94        { .compatible = "cavium,octeon-7130-ahci", },
  95        {},
  96};
  97MODULE_DEVICE_TABLE(of, ahci_of_match);
  98
  99static const struct acpi_device_id ahci_acpi_match[] = {
 100        { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
 101        { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
 102        {},
 103};
 104MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
 105
 106static struct platform_driver ahci_driver = {
 107        .probe = ahci_probe,
 108        .remove = ata_platform_remove_one,
 109        .shutdown = ahci_platform_shutdown,
 110        .driver = {
 111                .name = DRV_NAME,
 112                .of_match_table = ahci_of_match,
 113                .acpi_match_table = ahci_acpi_match,
 114                .pm = &ahci_pm_ops,
 115        },
 116};
 117module_platform_driver(ahci_driver);
 118
 119MODULE_DESCRIPTION("AHCI SATA platform driver");
 120MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 121MODULE_LICENSE("GPL");
 122MODULE_ALIAS("platform:ahci");
 123