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