drivers/ata/ahci_platform.c

   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
  29 static 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
  36 static struct scsi_host_template ahci_platform_sht = {
  37         AHCI_SHT(DRV_NAME),
  38 };
  39
  40 static int ahci_probe(struct platform_device *pdev)
  41 {
  42         struct device *dev = &pdev->dev;
  43         struct ahci_host_priv *hpriv;
  44         int rc;
  45
  46         hpriv = ahci_platform_get_resources(pdev);
  47         if (IS_ERR(hpriv))
  48                 return PTR_ERR(hpriv);
  49
  50         rc = ahci_platform_enable_resources(hpriv);
  51         if (rc)
  52                 return rc;
  53
  54         of_property_read_u32(dev->of_node,
  55                              "ports-implemented", &hpriv->force_port_map);
  56
  57         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  58                 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  59
  60         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
  61                                      &ahci_platform_sht);
  62         if (rc)
  63                 goto disable_resources;
  64
  65         return 0;
  66 disable_resources:
  67         ahci_platform_disable_resources(hpriv);
  68         return rc;
  69 }
  70
  71 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  72                          ahci_platform_resume);
  73
  74 static const struct of_device_id ahci_of_match[] = {
  75         { .compatible = "generic-ahci", },
  76         /* Keep the following compatibles for device tree compatibility */
  77         { .compatible = "snps,spear-ahci", },
  78         { .compatible = "snps,exynos5440-ahci", },
  79         { .compatible = "ibm,476gtr-ahci", },
  80         { .compatible = "snps,dwc-ahci", },
  81         { .compatible = "hisilicon,hisi-ahci", },
  82         {},
  83 };
  84 MODULE_DEVICE_TABLE(of, ahci_of_match);
  85
  86 static const struct acpi_device_id ahci_acpi_match[] = {
  87         { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
  88         {},
  89 };
  90 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
  91
  92 static struct platform_driver ahci_driver = {
  93         .probe = ahci_probe,
  94         .remove = ata_platform_remove_one,
  95         .driver = {
  96                 .name = DRV_NAME,
  97                 .of_match_table = ahci_of_match,
  98                 .acpi_match_table = ahci_acpi_match,
  99                 .pm = &ahci_pm_ops,
 100         },
 101 };
 102 module_platform_driver(ahci_driver);
 103
 104 MODULE_DESCRIPTION("AHCI SATA platform driver");
 105 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 106 MODULE_LICENSE("GPL");
 107 MODULE_ALIAS("platform:ahci");