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                                 const struct dw_mci_drv_data *drv_data)
  28 {
  29         struct dw_mci *host;
  30         struct resource *regs;
  31         int ret;
  32
  33         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  34         if (!host)
  35                 return -ENOMEM;
  36
  37         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  38         if (!regs)
  39                 return -ENXIO;
  40
  41         host->irq = platform_get_irq(pdev, 0);
  42         if (host->irq < 0)
  43                 return host->irq;
  44
  45         host->drv_data = drv_data;
  46         host->dev = &pdev->dev;
  47         host->irq_flags = 0;
  48         host->pdata = pdev->dev.platform_data;
  49         host->regs = devm_request_and_ioremap(&pdev->dev, regs);
  50         if (!host->regs)
  51                 return -ENOMEM;
  52
  53         if (drv_data && drv_data->init) {
  54                 ret = drv_data->init(host);
  55                 if (ret)
  56                         return ret;
  57         }
  58
  59         platform_set_drvdata(pdev, host);
  60         ret = dw_mci_probe(host);
  61         return ret;
  62 }
  63 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  64
  65 static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
  66 {
  67         return dw_mci_pltfm_register(pdev, NULL);
  68 }
  69
  70 static int __devexit dw_mci_pltfm_remove(struct platform_device *pdev)
  71 {
  72         struct dw_mci *host = platform_get_drvdata(pdev);
  73
  74         platform_set_drvdata(pdev, NULL);
  75         dw_mci_remove(host);
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
  79
  80 #ifdef CONFIG_PM_SLEEP
  81 /*
  82  * TODO: we should probably disable the clock to the card in the suspend path.
  83  */
  84 static int dw_mci_pltfm_suspend(struct device *dev)
  85 {
  86         int ret;
  87         struct dw_mci *host = dev_get_drvdata(dev);
  88
  89         ret = dw_mci_suspend(host);
  90         if (ret)
  91                 return ret;
  92
  93         return 0;
  94 }
  95
  96 static int dw_mci_pltfm_resume(struct device *dev)
  97 {
  98         int ret;
  99         struct dw_mci *host = dev_get_drvdata(dev);
 100
 101         ret = dw_mci_resume(host);
 102         if (ret)
 103                 return ret;
 104
 105         return 0;
 106 }
 107 #else
 108 #define dw_mci_pltfm_suspend    NULL
 109 #define dw_mci_pltfm_resume     NULL
 110 #endif /* CONFIG_PM_SLEEP */
 111
 112 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
 113 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
 114
 115 static const struct of_device_id dw_mci_pltfm_match[] = {
 116         { .compatible = "snps,dw-mshc", },
 117         {},
 118 };
 119 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 120
 121 static struct platform_driver dw_mci_pltfm_driver = {
 122         .remove         = __exit_p(dw_mci_pltfm_remove),
 123         .driver         = {
 124                 .name           = "dw_mmc",
 125                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
 126                 .pm             = &dw_mci_pltfm_pmops,
 127         },
 128 };
 129
 130 static int __init dw_mci_init(void)
 131 {
 132         return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
 133 }
 134
 135 static void __exit dw_mci_exit(void)
 136 {
 137         platform_driver_unregister(&dw_mci_pltfm_driver);
 138 }
 139
 140 module_init(dw_mci_init);
 141 module_exit(dw_mci_exit);
 142
 143 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 144 MODULE_AUTHOR("NXP Semiconductor VietNam");
 145 MODULE_AUTHOR("Imagination Technologies Ltd");
 146 MODULE_LICENSE("GPL v2");