drivers/mmc/host/dw_mmc-pltfm.c

   1 /*
   2  * Synopsys DesignWare Multimedia Card Interface driver
   3  *
   4  * Copyright (C) 2009 NXP Semiconductors
   5  * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/io.h>
  16 #include <linux/irq.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/slab.h>
  19 #include <linux/mmc/host.h>
  20 #include <linux/mmc/mmc.h>
  21 #include <linux/mmc/dw_mmc.h>
  22 #include "dw_mmc.h"
  23
  24 static int dw_mci_pltfm_probe(struct platform_device *pdev)
  25 {
  26         struct dw_mci *host;
  27         struct resource *regs;
  28         int ret;
  29
  30         host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
  31         if (!host)
  32                 return -ENOMEM;
  33
  34         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  35         if (!regs) {
  36                 ret = -ENXIO;
  37                 goto err_free;
  38         }
  39
  40         host->irq = platform_get_irq(pdev, 0);
  41         if (host->irq < 0) {
  42                 ret = host->irq;
  43                 goto err_free;
  44         }
  45
  46         host->dev = pdev->dev;
  47         host->irq_flags = 0;
  48         host->pdata = pdev->dev.platform_data;
  49         ret = -ENOMEM;
  50         host->regs = ioremap(regs->start, resource_size(regs));
  51         if (!host->regs)
  52                 goto err_free;
  53         platform_set_drvdata(pdev, host);
  54         ret = dw_mci_probe(host);
  55         if (ret)
  56                 goto err_out;
  57         return ret;
  58 err_out:
  59         iounmap(host->regs);
  60 err_free:
  61         kfree(host);
  62         return ret;
  63 }
  64
  65 static int __exit dw_mci_pltfm_remove(struct platform_device *pdev)
  66 {
  67         struct dw_mci *host = platform_get_drvdata(pdev);
  68
  69         platform_set_drvdata(pdev, NULL);
  70         dw_mci_remove(host);
  71         iounmap(host->regs);
  72         kfree(host);
  73         return 0;
  74 }
  75
  76 #ifdef CONFIG_PM_SLEEP
  77 /*
  78  * TODO: we should probably disable the clock to the card in the suspend path.
  79  */
  80 static int dw_mci_pltfm_suspend(struct device *dev)
  81 {
  82         int ret;
  83         struct dw_mci *host = dev_get_drvdata(dev);
  84
  85         ret = dw_mci_suspend(host);
  86         if (ret)
  87                 return ret;
  88
  89         return 0;
  90 }
  91
  92 static int dw_mci_pltfm_resume(struct device *dev)
  93 {
  94         int ret;
  95         struct dw_mci *host = dev_get_drvdata(dev);
  96
  97         ret = dw_mci_resume(host);
  98         if (ret)
  99                 return ret;
 100
 101         return 0;
 102 }
 103 #else
 104 #define dw_mci_pltfm_suspend    NULL
 105 #define dw_mci_pltfm_resume     NULL
 106 #endif /* CONFIG_PM_SLEEP */
 107
 108 static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
 109
 110 static struct platform_driver dw_mci_pltfm_driver = {
 111         .remove         = __exit_p(dw_mci_pltfm_remove),
 112         .driver         = {
 113                 .name           = "dw_mmc",
 114                 .pm             = &dw_mci_pltfm_pmops,
 115         },
 116 };
 117
 118 static int __init dw_mci_init(void)
 119 {
 120         return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
 121 }
 122
 123 static void __exit dw_mci_exit(void)
 124 {
 125         platform_driver_unregister(&dw_mci_pltfm_driver);
 126 }
 127
 128 module_init(dw_mci_init);
 129 module_exit(dw_mci_exit);
 130
 131 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 132 MODULE_AUTHOR("NXP Semiconductor VietNam");
 133 MODULE_AUTHOR("Imagination Technologies Ltd");
 134 MODULE_LICENSE("GPL v2");