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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/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         unsigned long hflags = 0;
 38         int rc;
 39 
 40         hpriv = ahci_platform_get_resources(pdev);
 41         if (IS_ERR(hpriv))
 42                 return PTR_ERR(hpriv);
 43 
 44         rc = ahci_platform_enable_resources(hpriv);
 45         if (rc)
 46                 return rc;
 47 
 48         /*
 49          * Some platforms might need to prepare for mmio region access,
 50          * which could be done in the following init call. So, the mmio
 51          * region shouldn't be accessed before init (if provided) has
 52          * returned successfully.
 53          */
 54         if (pdata && pdata->init) {
 55                 rc = pdata->init(dev, hpriv->mmio);
 56                 if (rc)
 57                         goto disable_resources;
 58         }
 59 
 60         if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
 61                 hflags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
 62 
 63         rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
 64                                      hflags, 0, 0);
 65         if (rc)
 66                 goto pdata_exit;
 67 
 68         return 0;
 69 pdata_exit:
 70         if (pdata && pdata->exit)
 71                 pdata->exit(dev);
 72 disable_resources:
 73         ahci_platform_disable_resources(hpriv);
 74         return rc;
 75 }
 76 
 77 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
 78                          ahci_platform_resume);
 79 
 80 static const struct of_device_id ahci_of_match[] = {
 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");
106 

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