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/err.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/io.h>
  17 #include <linux/irq.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/slab.h>
  20 #include <linux/mmc/host.h>
  21 #include <linux/mmc/mmc.h>
  22 #include <linux/mmc/dw_mmc.h>
  23 #include <linux/of.h>
  24
  25 #include "dw_mmc.h"
  26
  27 int dw_mci_pltfm_register(struct platform_device *pdev,
  28                           const struct dw_mci_drv_data *drv_data)
  29 {
  30         struct dw_mci *host;
  31         struct resource *regs;
  32         int ret;
  33
  34         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  35         if (!host)
  36                 return -ENOMEM;
  37
  38         host->irq = platform_get_irq(pdev, 0);
  39         if (host->irq < 0)
  40                 return host->irq;
  41
  42         host->drv_data = drv_data;
  43         host->dev = &pdev->dev;
  44         host->irq_flags = 0;
  45         host->pdata = pdev->dev.platform_data;
  46
  47         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  48         host->regs = devm_ioremap_resource(&pdev->dev, regs);
  49         if (IS_ERR(host->regs))
  50                 return PTR_ERR(host->regs);
  51
  52         if (drv_data && drv_data->init) {
  53                 ret = drv_data->init(host);
  54                 if (ret)
  55                         return ret;
  56         }
  57
  58         platform_set_drvdata(pdev, host);
  59         return dw_mci_probe(host);
  60 }
  61 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  62
  63 static int dw_mci_pltfm_probe(struct platform_device *pdev)
  64 {
  65         return dw_mci_pltfm_register(pdev, NULL);
  66 }
  67
  68 static int dw_mci_pltfm_remove(struct platform_device *pdev)
  69 {
  70         struct dw_mci *host = platform_get_drvdata(pdev);
  71
  72         dw_mci_remove(host);
  73         return 0;
  74 }
  75 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
  76
  77 #ifdef CONFIG_PM_SLEEP
  78 /*
  79  * TODO: we should probably disable the clock to the card in the suspend path.
  80  */
  81 static int dw_mci_pltfm_suspend(struct device *dev)
  82 {
  83         struct dw_mci *host = dev_get_drvdata(dev);
  84
  85         return dw_mci_suspend(host);
  86 }
  87
  88 static int dw_mci_pltfm_resume(struct device *dev)
  89 {
  90         struct dw_mci *host = dev_get_drvdata(dev);
  91
  92         return dw_mci_resume(host);
  93 }
  94 #else
  95 #define dw_mci_pltfm_suspend    NULL
  96 #define dw_mci_pltfm_resume     NULL
  97 #endif /* CONFIG_PM_SLEEP */
  98
  99 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
 100 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
 101
 102 static const struct of_device_id dw_mci_pltfm_match[] = {
 103         { .compatible = "snps,dw-mshc", },
 104         {},
 105 };
 106 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 107
 108 static struct platform_driver dw_mci_pltfm_driver = {
 109         .probe          = dw_mci_pltfm_probe,
 110         .remove         = dw_mci_pltfm_remove,
 111         .driver         = {
 112                 .name           = "dw_mmc",
 113                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
 114                 .pm             = &dw_mci_pltfm_pmops,
 115         },
 116 };
 117
 118 module_platform_driver(dw_mci_pltfm_driver);
 119
 120 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 121 MODULE_AUTHOR("NXP Semiconductor VietNam");
 122 MODULE_AUTHOR("Imagination Technologies Ltd");
 123 MODULE_LICENSE("GPL v2");