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_platform_data *pdata = dev_get_platdata(dev);
  36         struct ahci_host_priv *hpriv;
  37         int rc;
  38
  39         hpriv = ahci_platform_get_resources(pdev);
  40         if (IS_ERR(hpriv))
  41                 return PTR_ERR(hpriv);
  42
  43         rc = ahci_platform_enable_resources(hpriv);
  44         if (rc)
  45                 return rc;
  46
  47         /*
  48          * Some platforms might need to prepare for mmio region access,
  49          * which could be done in the following init call. So, the mmio
  50          * region shouldn't be accessed before init (if provided) has
  51          * returned successfully.
  52          */
  53         if (pdata && pdata->init) {
  54                 rc = pdata->init(dev, hpriv->mmio);
  55                 if (rc)
  56                         goto disable_resources;
  57         }
  58
  59         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
  60                 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
  61
  62         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info);
  63         if (rc)
  64                 goto pdata_exit;
  65
  66         return 0;
  67 pdata_exit:
  68         if (pdata && pdata->exit)
  69                 pdata->exit(dev);
  70 disable_resources:
  71         ahci_platform_disable_resources(hpriv);
  72         return rc;
  73 }
  74
  75 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
  76                          ahci_platform_resume);
  77
  78 static const struct of_device_id ahci_of_match[] = {
  79         { .compatible = "generic-ahci", },
  80         /* Keep the following compatibles for device tree compatibility */
  81         { .compatible = "snps,spear-ahci", },
  82         { .compatible = "snps,exynos5440-ahci", },
  83         { .compatible = "ibm,476gtr-ahci", },
  84         { .compatible = "snps,dwc-ahci", },
  85         { .compatible = "hisilicon,hisi-ahci", },
  86         {},
  87 };
  88 MODULE_DEVICE_TABLE(of, ahci_of_match);
  89
  90 static struct platform_driver ahci_driver = {
  91         .probe = ahci_probe,
  92         .remove = ata_platform_remove_one,
  93         .driver = {
  94                 .name = "ahci",
  95                 .owner = THIS_MODULE,
  96                 .of_match_table = ahci_of_match,
  97                 .pm = &ahci_pm_ops,
  98         },
  99 };
 100 module_platform_driver(ahci_driver);
 101
 102 MODULE_DESCRIPTION("AHCI SATA platform driver");
 103 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
 104 MODULE_LICENSE("GPL");
 105 MODULE_ALIAS("platform:ahci");