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 #include "dw_mmc-pltfm.h"
  27
  28 static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr)
  29 {
  30         *cmdr |= SDMMC_CMD_USE_HOLD_REG;
  31 }
  32
  33 static const struct dw_mci_drv_data rockchip_drv_data = {
  34         .prepare_command        = dw_mci_rockchip_prepare_command,
  35 };
  36
  37 int dw_mci_pltfm_register(struct platform_device *pdev,
  38                           const struct dw_mci_drv_data *drv_data)
  39 {
  40         struct dw_mci *host;
  41         struct resource *regs;
  42
  43         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  44         if (!host)
  45                 return -ENOMEM;
  46
  47         host->irq = platform_get_irq(pdev, 0);
  48         if (host->irq < 0)
  49                 return host->irq;
  50
  51         host->drv_data = drv_data;
  52         host->dev = &pdev->dev;
  53         host->irq_flags = 0;
  54         host->pdata = pdev->dev.platform_data;
  55
  56         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  57         host->regs = devm_ioremap_resource(&pdev->dev, regs);
  58         if (IS_ERR(host->regs))
  59                 return PTR_ERR(host->regs);
  60
  61         platform_set_drvdata(pdev, host);
  62         return dw_mci_probe(host);
  63 }
  64 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  65
  66 #ifdef CONFIG_PM_SLEEP
  67 /*
  68  * TODO: we should probably disable the clock to the card in the suspend path.
  69  */
  70 static int dw_mci_pltfm_suspend(struct device *dev)
  71 {
  72         struct dw_mci *host = dev_get_drvdata(dev);
  73
  74         return dw_mci_suspend(host);
  75 }
  76
  77 static int dw_mci_pltfm_resume(struct device *dev)
  78 {
  79         struct dw_mci *host = dev_get_drvdata(dev);
  80
  81         return dw_mci_resume(host);
  82 }
  83 #else
  84 #define dw_mci_pltfm_suspend    NULL
  85 #define dw_mci_pltfm_resume     NULL
  86 #endif /* CONFIG_PM_SLEEP */
  87
  88 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
  89 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
  90
  91 static const struct of_device_id dw_mci_pltfm_match[] = {
  92         { .compatible = "snps,dw-mshc", },
  93         { .compatible = "rockchip,rk2928-dw-mshc",
  94                 .data = &rockchip_drv_data },
  95         {},
  96 };
  97 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
  98
  99 static int dw_mci_pltfm_probe(struct platform_device *pdev)
 100 {
 101         const struct dw_mci_drv_data *drv_data = NULL;
 102         const struct of_device_id *match;
 103
 104         if (pdev->dev.of_node) {
 105                 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
 106                 drv_data = match->data;
 107         }
 108
 109         return dw_mci_pltfm_register(pdev, drv_data);
 110 }
 111
 112 int dw_mci_pltfm_remove(struct platform_device *pdev)
 113 {
 114         struct dw_mci *host = platform_get_drvdata(pdev);
 115
 116         dw_mci_remove(host);
 117         return 0;
 118 }
 119 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 120
 121 static struct platform_driver dw_mci_pltfm_driver = {
 122         .probe          = dw_mci_pltfm_probe,
 123         .remove         = dw_mci_pltfm_remove,
 124         .driver         = {
 125                 .name           = "dw_mmc",
 126                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
 127                 .pm             = &dw_mci_pltfm_pmops,
 128         },
 129 };
 130
 131 module_platform_driver(dw_mci_pltfm_driver);
 132
 133 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 134 MODULE_AUTHOR("NXP Semiconductor VietNam");
 135 MODULE_AUTHOR("Imagination Technologies Ltd");
 136 MODULE_LICENSE("GPL v2");