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 <linux/of.h>
  23
  24 #include "dw_mmc.h"
  25
  26 int dw_mci_pltfm_register(struct platform_device *pdev)
  27 {
  28         struct dw_mci *host;
  29         struct resource *regs;
  30         int ret;
  31
  32         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  33         if (!host)
  34                 return -ENOMEM;
  35
  36         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  37         if (!regs)
  38                 return -ENXIO;
  39
  40         host->irq = platform_get_irq(pdev, 0);
  41         if (host->irq < 0)
  42                 return host->irq;
  43
  44         host->dev = &pdev->dev;
  45         host->irq_flags = 0;
  46         host->pdata = pdev->dev.platform_data;
  47         host->regs = devm_request_and_ioremap(&pdev->dev, regs);
  48         if (!host->regs)
  49                 return -ENOMEM;
  50
  51         platform_set_drvdata(pdev, host);
  52         ret = dw_mci_probe(host);
  53         return ret;
  54 }
  55 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  56
  57 static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
  58 {
  59         return dw_mci_pltfm_register(pdev);
  60 }
  61
  62 static int __devexit dw_mci_pltfm_remove(struct platform_device *pdev)
  63 {
  64         struct dw_mci *host = platform_get_drvdata(pdev);
  65
  66         platform_set_drvdata(pdev, NULL);
  67         dw_mci_remove(host);
  68         return 0;
  69 }
  70 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
  71
  72 #ifdef CONFIG_PM_SLEEP
  73 /*
  74  * TODO: we should probably disable the clock to the card in the suspend path.
  75  */
  76 static int dw_mci_pltfm_suspend(struct device *dev)
  77 {
  78         int ret;
  79         struct dw_mci *host = dev_get_drvdata(dev);
  80
  81         ret = dw_mci_suspend(host);
  82         if (ret)
  83                 return ret;
  84
  85         return 0;
  86 }
  87
  88 static int dw_mci_pltfm_resume(struct device *dev)
  89 {
  90         int ret;
  91         struct dw_mci *host = dev_get_drvdata(dev);
  92
  93         ret = dw_mci_resume(host);
  94         if (ret)
  95                 return ret;
  96
  97         return 0;
  98 }
  99 #else
 100 #define dw_mci_pltfm_suspend    NULL
 101 #define dw_mci_pltfm_resume     NULL
 102 #endif /* CONFIG_PM_SLEEP */
 103
 104 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
 105 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
 106
 107 static const struct of_device_id dw_mci_pltfm_match[] = {
 108         { .compatible = "snps,dw-mshc", },
 109         {},
 110 };
 111 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 112
 113 static struct platform_driver dw_mci_pltfm_driver = {
 114         .remove         = __exit_p(dw_mci_pltfm_remove),
 115         .driver         = {
 116                 .name           = "dw_mmc",
 117                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
 118                 .pm             = &dw_mci_pltfm_pmops,
 119         },
 120 };
 121
 122 static int __init dw_mci_init(void)
 123 {
 124         return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
 125 }
 126
 127 static void __exit dw_mci_exit(void)
 128 {
 129         platform_driver_unregister(&dw_mci_pltfm_driver);
 130 }
 131
 132 module_init(dw_mci_init);
 133 module_exit(dw_mci_exit);
 134
 135 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 136 MODULE_AUTHOR("NXP Semiconductor VietNam");
 137 MODULE_AUTHOR("Imagination Technologies Ltd");
 138 MODULE_LICENSE("GPL v2");