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/pm_runtime.h>
  20 #include <linux/slab.h>
  21 #include <linux/mmc/host.h>
  22 #include <linux/mmc/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 const struct dev_pm_ops dw_mci_pltfm_pmops = {
  62         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
  63                                 pm_runtime_force_resume)
  64         SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
  65                            dw_mci_runtime_resume,
  66                            NULL)
  67 };
  68 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
  69
  70 static const struct of_device_id dw_mci_pltfm_match[] = {
  71         { .compatible = "snps,dw-mshc", },
  72         { .compatible = "altr,socfpga-dw-mshc", },
  73         { .compatible = "img,pistachio-dw-mshc", },
  74         {},
  75 };
  76 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
  77
  78 static int dw_mci_pltfm_probe(struct platform_device *pdev)
  79 {
  80         const struct dw_mci_drv_data *drv_data = NULL;
  81         const struct of_device_id *match;
  82
  83         if (pdev->dev.of_node) {
  84                 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
  85                 drv_data = match->data;
  86         }
  87
  88         return dw_mci_pltfm_register(pdev, drv_data);
  89 }
  90
  91 int dw_mci_pltfm_remove(struct platform_device *pdev)
  92 {
  93         struct dw_mci *host = platform_get_drvdata(pdev);
  94
  95         dw_mci_remove(host);
  96         return 0;
  97 }
  98 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
  99
 100 static struct platform_driver dw_mci_pltfm_driver = {
 101         .probe          = dw_mci_pltfm_probe,
 102         .remove         = dw_mci_pltfm_remove,
 103         .driver         = {
 104                 .name           = "dw_mmc",
 105                 .of_match_table = dw_mci_pltfm_match,
 106                 .pm             = &dw_mci_pltfm_pmops,
 107         },
 108 };
 109
 110 module_platform_driver(dw_mci_pltfm_driver);
 111
 112 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 113 MODULE_AUTHOR("NXP Semiconductor VietNam");
 114 MODULE_AUTHOR("Imagination Technologies Ltd");
 115 MODULE_LICENSE("GPL v2");