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 static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr)
  28 {
  29         *cmdr |= SDMMC_CMD_USE_HOLD_REG;
  30 }
  31
  32 static const struct dw_mci_drv_data rockchip_drv_data = {
  33         .prepare_command        = dw_mci_rockchip_prepare_command,
  34 };
  35
  36 int dw_mci_pltfm_register(struct platform_device *pdev,
  37                           const struct dw_mci_drv_data *drv_data)
  38 {
  39         struct dw_mci *host;
  40         struct resource *regs;
  41         int ret;
  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         if (drv_data && drv_data->init) {
  62                 ret = drv_data->init(host);
  63                 if (ret)
  64                         return ret;
  65         }
  66
  67         platform_set_drvdata(pdev, host);
  68         return dw_mci_probe(host);
  69 }
  70 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  71
  72 #ifdef CONFIG_PM_SLEEP
  73 /*
  74  * TODO: we should probably disable the clock to the card in the suspend path.
  75  */
  76 static int dw_mci_pltfm_suspend(struct device *dev)
  77 {
  78         struct dw_mci *host = dev_get_drvdata(dev);
  79
  80         return dw_mci_suspend(host);
  81 }
  82
  83 static int dw_mci_pltfm_resume(struct device *dev)
  84 {
  85         struct dw_mci *host = dev_get_drvdata(dev);
  86
  87         return dw_mci_resume(host);
  88 }
  89 #else
  90 #define dw_mci_pltfm_suspend    NULL
  91 #define dw_mci_pltfm_resume     NULL
  92 #endif /* CONFIG_PM_SLEEP */
  93
  94 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
  95 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
  96
  97 static const struct of_device_id dw_mci_pltfm_match[] = {
  98         { .compatible = "snps,dw-mshc", },
  99         { .compatible = "rockchip,rk2928-dw-mshc",
 100                 .data = &rockchip_drv_data },
 101         {},
 102 };
 103 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 104
 105 static int dw_mci_pltfm_probe(struct platform_device *pdev)
 106 {
 107         const struct dw_mci_drv_data *drv_data = NULL;
 108         const struct of_device_id *match;
 109
 110         if (pdev->dev.of_node) {
 111                 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
 112                 drv_data = match->data;
 113         }
 114
 115         return dw_mci_pltfm_register(pdev, drv_data);
 116 }
 117
 118 int dw_mci_pltfm_remove(struct platform_device *pdev)
 119 {
 120         struct dw_mci *host = platform_get_drvdata(pdev);
 121
 122         dw_mci_remove(host);
 123         return 0;
 124 }
 125 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 126
 127 static struct platform_driver dw_mci_pltfm_driver = {
 128         .probe          = dw_mci_pltfm_probe,
 129         .remove         = dw_mci_pltfm_remove,
 130         .driver         = {
 131                 .name           = "dw_mmc",
 132                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
 133                 .pm             = &dw_mci_pltfm_pmops,
 134         },
 135 };
 136
 137 module_platform_driver(dw_mci_pltfm_driver);
 138
 139 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 140 MODULE_AUTHOR("NXP Semiconductor VietNam");
 141 MODULE_AUTHOR("Imagination Technologies Ltd");
 142 MODULE_LICENSE("GPL v2");