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 "ahci.h"
  24
  25 static 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
  32 static int ahci_probe(struct platform_device *pdev)
  33 {
  34         struct device *dev = &pdev->dev;
  35         struct ahci_host_priv *hpriv;
  36         int rc;
  37
  38         hpriv = ahci_platform_get_resources(pdev);
  39         if (IS_ERR(hpriv))
  40                 return PTR_ERR(hpriv);
  41
  42         rc = ahci_platform_enable_resources(hpriv);
  43         if (rc)
  44                 return rc;
  45
  46         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  47                 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  48
  49         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info);
  50         if (rc)
  51                 goto disable_resources;
  52
  53         return 0;
  54 disable_resources:
  55         ahci_platform_disable_resources(hpriv);
  56         return rc;
  57 }
  58
  59 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  60                          ahci_platform_resume);
  61
  62 static const struct of_device_id ahci_of_match[] = {
  63         { .compatible = "generic-ahci", },
  64         /* Keep the following compatibles for device tree compatibility */
  65         { .compatible = "snps,spear-ahci", },
  66         { .compatible = "snps,exynos5440-ahci", },
  67         { .compatible = "ibm,476gtr-ahci", },
  68         { .compatible = "snps,dwc-ahci", },
  69         { .compatible = "hisilicon,hisi-ahci", },
  70         {},
  71 };
  72 MODULE_DEVICE_TABLE(of, ahci_of_match);
  73
  74 static struct platform_driver ahci_driver = {
  75         .probe = ahci_probe,
  76         .remove = ata_platform_remove_one,
  77         .driver = {
  78                 .name = "ahci",
  79                 .owner = THIS_MODULE,
  80                 .of_match_table = ahci_of_match,
  81                 .pm = &ahci_pm_ops,
  82         },
  83 };
  84 module_platform_driver(ahci_driver);
  85
  86 MODULE_DESCRIPTION("AHCI SATA platform driver");
  87 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
  88 MODULE_LICENSE("GPL");
  89 MODULE_ALIAS("platform:ahci");