kernel/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 static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr)
  30 {
  31         *cmdr |= SDMMC_CMD_USE_HOLD_REG;
  32 }
  33
  34 static const struct dw_mci_drv_data socfpga_drv_data = {
  35         .prepare_command        = dw_mci_pltfm_prepare_command,
  36 };
  37
  38 static const struct dw_mci_drv_data pistachio_drv_data = {
  39         .prepare_command        = dw_mci_pltfm_prepare_command,
  40 };
  41
  42 int dw_mci_pltfm_register(struct platform_device *pdev,
  43                           const struct dw_mci_drv_data *drv_data)
  44 {
  45         struct dw_mci *host;
  46         struct resource *regs;
  47
  48         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  49         if (!host)
  50                 return -ENOMEM;
  51
  52         host->irq = platform_get_irq(pdev, 0);
  53         if (host->irq < 0)
  54                 return host->irq;
  55
  56         host->drv_data = drv_data;
  57         host->dev = &pdev->dev;
  58         host->irq_flags = 0;
  59         host->pdata = pdev->dev.platform_data;
  60
  61         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  62         host->regs = devm_ioremap_resource(&pdev->dev, regs);
  63         if (IS_ERR(host->regs))
  64                 return PTR_ERR(host->regs);
  65
  66         /* Get registers' physical base address */
  67         host->phy_regs = regs->start;
  68
  69         platform_set_drvdata(pdev, host);
  70         return dw_mci_probe(host);
  71 }
  72 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
  73
  74 #ifdef CONFIG_PM_SLEEP
  75 /*
  76  * TODO: we should probably disable the clock to the card in the suspend path.
  77  */
  78 static int dw_mci_pltfm_suspend(struct device *dev)
  79 {
  80         struct dw_mci *host = dev_get_drvdata(dev);
  81
  82         return dw_mci_suspend(host);
  83 }
  84
  85 static int dw_mci_pltfm_resume(struct device *dev)
  86 {
  87         struct dw_mci *host = dev_get_drvdata(dev);
  88
  89         return dw_mci_resume(host);
  90 }
  91 #endif /* CONFIG_PM_SLEEP */
  92
  93 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
  94 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
  95
  96 static const struct of_device_id dw_mci_pltfm_match[] = {
  97         { .compatible = "snps,dw-mshc", },
  98         { .compatible = "altr,socfpga-dw-mshc",
  99                 .data = &socfpga_drv_data },
 100         { .compatible = "img,pistachio-dw-mshc",
 101                 .data = &pistachio_drv_data },
 102         {},
 103 };
 104 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 105
 106 static int dw_mci_pltfm_probe(struct platform_device *pdev)
 107 {
 108         const struct dw_mci_drv_data *drv_data = NULL;
 109         const struct of_device_id *match;
 110
 111         if (pdev->dev.of_node) {
 112                 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
 113                 drv_data = match->data;
 114         }
 115
 116         return dw_mci_pltfm_register(pdev, drv_data);
 117 }
 118
 119 int dw_mci_pltfm_remove(struct platform_device *pdev)
 120 {
 121         struct dw_mci *host = platform_get_drvdata(pdev);
 122
 123         dw_mci_remove(host);
 124         return 0;
 125 }
 126 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 127
 128 static struct platform_driver dw_mci_pltfm_driver = {
 129         .probe          = dw_mci_pltfm_probe,
 130         .remove         = dw_mci_pltfm_remove,
 131         .driver         = {
 132                 .name           = "dw_mmc",
 133                 .of_match_table = dw_mci_pltfm_match,
 134                 .pm             = &dw_mci_pltfm_pmops,
 135         },
 136 };
 137
 138 module_platform_driver(dw_mci_pltfm_driver);
 139
 140 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
 141 MODULE_AUTHOR("NXP Semiconductor VietNam");
 142 MODULE_AUTHOR("Imagination Technologies Ltd");
 143 MODULE_LICENSE("GPL v2");