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