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 #include <linux/clk.h>
  25
  26 #include "dw_mmc.h"
  27 #include "dw_mmc-pltfm.h"
  28
  29 int dw_mci_pltfm_register(struct platform_device *pdev,
  30                           const struct dw_mci_drv_data *drv_data)
  31 {
  32         struct dw_mci *host;
  33         struct resource *regs;
  34
  35         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  36         if (!host)
  37                 return -ENOMEM;
  38
  39         host->irq = platform_get_irq(pdev, 0);
  40         if (host->irq < 0)
  41                 return host->irq;
  42
  43         host->drv_data = drv_data;
  44         host->dev = &pdev->dev;
  45         host->irq_flags = 0;
  46         host->pdata = pdev->dev.platform_data;
  47
  48         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  49         host->regs = devm_ioremap_resource(&pdev->dev, regs);
  50         if (IS_ERR(host->regs))
  51                 return PTR_ERR(host->regs);
  52
  53         /* Get registers' physical base address */
  54         host->phy_regs = regs->start;
  55
  56         platform_set_drvdata(pdev, host);
  57         return dw_mci_probe(host);
  58 }
  59 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  60
  61 #ifdef CONFIG_PM_SLEEP
  62 /*
  63  * TODO: we should probably disable the clock to the card in the suspend path.
  64  */
  65 static int dw_mci_pltfm_suspend(struct device *dev)
  66 {
  67         struct dw_mci *host = dev_get_drvdata(dev);
  68
  69         return dw_mci_suspend(host);
  70 }
  71
  72 static int dw_mci_pltfm_resume(struct device *dev)
  73 {
  74         struct dw_mci *host = dev_get_drvdata(dev);
  75
  76         return dw_mci_resume(host);
  77 }
  78 #endif /* CONFIG_PM_SLEEP */
  79
  80 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
  81 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
  82
  83 static const struct of_device_id dw_mci_pltfm_match[] = {
  84         { .compatible = "snps,dw-mshc", },
  85         { .compatible = "altr,socfpga-dw-mshc", },
  86         { .compatible = "img,pistachio-dw-mshc", },
  87         {},
  88 };
  89 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
  90
  91 static int dw_mci_pltfm_probe(struct platform_device *pdev)
  92 {
  93         const struct dw_mci_drv_data *drv_data = NULL;
  94         const struct of_device_id *match;
  95
  96         if (pdev->dev.of_node) {
  97                 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
  98                 drv_data = match->data;
  99         }
 100
 101         return dw_mci_pltfm_register(pdev, drv_data);
 102 }
 103
 104 int dw_mci_pltfm_remove(struct platform_device *pdev)
 105 {
 106         struct dw_mci *host = platform_get_drvdata(pdev);
 107
 108         dw_mci_remove(host);
 109         return 0;
 110 }
 111 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 112
 113 static struct platform_driver dw_mci_pltfm_driver = {
 114         .probe          = dw_mci_pltfm_probe,
 115         .remove         = dw_mci_pltfm_remove,
 116         .driver         = {
 117                 .name           = "dw_mmc",
 118                 .of_match_table = dw_mci_pltfm_match,
 119                 .pm             = &dw_mci_pltfm_pmops,
 120         },
 121 };
 122
 123 module_platform_driver(dw_mci_pltfm_driver);
 124
 125 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 126 MODULE_AUTHOR("NXP Semiconductor VietNam");
 127 MODULE_AUTHOR("Imagination Technologies Ltd");
 128 MODULE_LICENSE("GPL v2");