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