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 #define DRV_NAME "ahci"
  26
  27 static const struct ata_port_info ahci_port_info = {
  28         .flags          = AHCI_FLAG_COMMON,
  29         .pio_mask       = ATA_PIO4,
  30         .udma_mask      = ATA_UDMA6,
  31         .port_ops       = &ahci_platform_ops,
  32 };
  33
  34 static struct scsi_host_template ahci_platform_sht = {
  35         AHCI_SHT(DRV_NAME),
  36 };
  37
  38 static int ahci_probe(struct platform_device *pdev)
  39 {
  40         struct device *dev = &pdev->dev;
  41         struct ahci_host_priv *hpriv;
  42         int rc;
  43
  44         hpriv = ahci_platform_get_resources(pdev);
  45         if (IS_ERR(hpriv))
  46                 return PTR_ERR(hpriv);
  47
  48         rc = ahci_platform_enable_resources(hpriv);
  49         if (rc)
  50                 return rc;
  51
  52         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  53                 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  54
  55         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
  56                                      &ahci_platform_sht);
  57         if (rc)
  58                 goto disable_resources;
  59
  60         return 0;
  61 disable_resources:
  62         ahci_platform_disable_resources(hpriv);
  63         return rc;
  64 }
  65
  66 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  67                          ahci_platform_resume);
  68
  69 static const struct of_device_id ahci_of_match[] = {
  70         { .compatible = "generic-ahci", },
  71         /* Keep the following compatibles for device tree compatibility */
  72         { .compatible = "snps,spear-ahci", },
  73         { .compatible = "snps,exynos5440-ahci", },
  74         { .compatible = "ibm,476gtr-ahci", },
  75         { .compatible = "snps,dwc-ahci", },
  76         { .compatible = "hisilicon,hisi-ahci", },
  77         {},
  78 };
  79 MODULE_DEVICE_TABLE(of, ahci_of_match);
  80
  81 static struct platform_driver ahci_driver = {
  82         .probe = ahci_probe,
  83         .remove = ata_platform_remove_one,
  84         .driver = {
  85                 .name = DRV_NAME,
  86                 .of_match_table = ahci_of_match,
  87                 .pm = &ahci_pm_ops,
  88         },
  89 };
  90 module_platform_driver(ahci_driver);
  91
  92 MODULE_DESCRIPTION("AHCI SATA platform driver");
  93 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
  94 MODULE_LICENSE("GPL");
  95 MODULE_ALIAS("platform:ahci");