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Linux/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");
 99 

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