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/platform_device.h>
  20 #include <linux/libata.h>
  21 #include <linux/ahci_platform.h>
  22 #include "ahci.h"
  23
  24 static const struct ata_port_info ahci_port_info = {
  25         .flags          = AHCI_FLAG_COMMON,
  26         .pio_mask       = ATA_PIO4,
  27         .udma_mask      = ATA_UDMA6,
  28         .port_ops       = &ahci_platform_ops,
  29 };
  30
  31 static int ahci_probe(struct platform_device *pdev)
  32 {
  33         struct device *dev = &pdev->dev;
  34         struct ahci_platform_data *pdata = dev_get_platdata(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         /*
  47          * Some platforms might need to prepare for mmio region access,
  48          * which could be done in the following init call. So, the mmio
  49          * region shouldn't be accessed before init (if provided) has
  50          * returned successfully.
  51          */
  52         if (pdata && pdata->init) {
  53                 rc = pdata->init(dev, hpriv->mmio);
  54                 if (rc)
  55                         goto disable_resources;
  56         }
  57
  58         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 0, 0);
  59         if (rc)
  60                 goto pdata_exit;
  61
  62         return 0;
  63 pdata_exit:
  64         if (pdata && pdata->exit)
  65                 pdata->exit(dev);
  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 = "snps,spear-ahci", },
  76         { .compatible = "snps,exynos5440-ahci", },
  77         { .compatible = "ibm,476gtr-ahci", },
  78         { .compatible = "snps,dwc-ahci", },
  79         {},
  80 };
  81 MODULE_DEVICE_TABLE(of, ahci_of_match);
  82
  83 static struct platform_driver ahci_driver = {
  84         .probe = ahci_probe,
  85         .remove = ata_platform_remove_one,
  86         .driver = {
  87                 .name = "ahci",
  88                 .owner = THIS_MODULE,
  89                 .of_match_table = ahci_of_match,
  90                 .pm = &ahci_pm_ops,
  91         },
  92 };
  93 module_platform_driver(ahci_driver);
  94
  95 MODULE_DESCRIPTION("AHCI SATA platform driver");
  96 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
  97 MODULE_LICENSE("GPL");
  98 MODULE_ALIAS("platform:ahci");