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 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
  43 static struct scsi_host_template ahci_platform_sht = {
  44         AHCI_SHT(DRV_NAME),
  45 };
  46
  47 static 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                                             AHCI_PLATFORM_GET_RESETS);
  56         if (IS_ERR(hpriv))
  57                 return PTR_ERR(hpriv);
  58
  59         rc = ahci_platform_enable_resources(hpriv);
  60         if (rc)
  61                 return rc;
  62
  63         of_property_read_u32(dev->of_node,
  64                              "ports-implemented", &hpriv->force_port_map);
  65
  66         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  67                 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  68
  69         port = acpi_device_get_match_data(dev);
  70         if (!port)
  71                 port = &ahci_port_info;
  72
  73         rc = ahci_platform_init_host(pdev, hpriv, port,
  74                                      &ahci_platform_sht);
  75         if (rc)
  76                 goto disable_resources;
  77
  78         return 0;
  79 disable_resources:
  80         ahci_platform_disable_resources(hpriv);
  81         return rc;
  82 }
  83
  84 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  85                          ahci_platform_resume);
  86
  87 static const struct of_device_id ahci_of_match[] = {
  88         { .compatible = "generic-ahci", },
  89         /* Keep the following compatibles for device tree compatibility */
  90         { .compatible = "snps,spear-ahci", },
  91         { .compatible = "ibm,476gtr-ahci", },
  92         { .compatible = "snps,dwc-ahci", },
  93         { .compatible = "hisilicon,hisi-ahci", },
  94         { .compatible = "cavium,octeon-7130-ahci", },
  95         {},
  96 };
  97 MODULE_DEVICE_TABLE(of, ahci_of_match);
  98
  99 static 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 };
 104 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
 105
 106 static 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 };
 117 module_platform_driver(ahci_driver);
 118
 119 MODULE_DESCRIPTION("AHCI SATA platform driver");
 120 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 121 MODULE_LICENSE("GPL");
 122 MODULE_ALIAS("platform:ahci");