drivers/mmc/host/sdhci-of-hlwd.c

   1 /*
   2  * drivers/mmc/host/sdhci-of-hlwd.c
   3  *
   4  * Nintendo Wii Secure Digital Host Controller Interface.
   5  * Copyright (C) 2009 The GameCube Linux Team
   6  * Copyright (C) 2009 Albert Herranz
   7  *
   8  * Based on sdhci-of-esdhc.c
   9  *
  10  * Copyright (c) 2007 Freescale Semiconductor, Inc.
  11  * Copyright (c) 2009 MontaVista Software, Inc.
  12  *
  13  * Authors: Xiaobo Xie <X.Xie@freescale.com>
  14  *          Anton Vorontsov <avorontsov@ru.mvista.com>
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or (at
  19  * your option) any later version.
  20  */
  21
  22 #include <linux/delay.h>
  23 #include <linux/mmc/host.h>
  24 #include "sdhci-pltfm.h"
  25
  26 /*
  27  * Ops and quirks for the Nintendo Wii SDHCI controllers.
  28  */
  29
  30 /*
  31  * We need a small delay after each write, or things go horribly wrong.
  32  */
  33 #define SDHCI_HLWD_WRITE_DELAY  5 /* usecs */
  34
  35 static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
  36 {
  37         sdhci_be32bs_writel(host, val, reg);
  38         udelay(SDHCI_HLWD_WRITE_DELAY);
  39 }
  40
  41 static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
  42 {
  43         sdhci_be32bs_writew(host, val, reg);
  44         udelay(SDHCI_HLWD_WRITE_DELAY);
  45 }
  46
  47 static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
  48 {
  49         sdhci_be32bs_writeb(host, val, reg);
  50         udelay(SDHCI_HLWD_WRITE_DELAY);
  51 }
  52
  53 static struct sdhci_ops sdhci_hlwd_ops = {
  54         .read_l = sdhci_be32bs_readl,
  55         .read_w = sdhci_be32bs_readw,
  56         .read_b = sdhci_be32bs_readb,
  57         .write_l = sdhci_hlwd_writel,
  58         .write_w = sdhci_hlwd_writew,
  59         .write_b = sdhci_hlwd_writeb,
  60 };
  61
  62 static struct sdhci_pltfm_data sdhci_hlwd_pdata = {
  63         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
  64                   SDHCI_QUIRK_32BIT_DMA_SIZE,
  65         .ops = &sdhci_hlwd_ops,
  66 };
  67
  68 static int __devinit sdhci_hlwd_probe(struct platform_device *pdev)
  69 {
  70         return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata);
  71 }
  72
  73 static int __devexit sdhci_hlwd_remove(struct platform_device *pdev)
  74 {
  75         return sdhci_pltfm_unregister(pdev);
  76 }
  77
  78 static const struct of_device_id sdhci_hlwd_of_match[] = {
  79         { .compatible = "nintendo,hollywood-sdhci" },
  80         { }
  81 };
  82 MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
  83
  84 static struct platform_driver sdhci_hlwd_driver = {
  85         .driver = {
  86                 .name = "sdhci-hlwd",
  87                 .owner = THIS_MODULE,
  88                 .of_match_table = sdhci_hlwd_of_match,
  89         },
  90         .probe = sdhci_hlwd_probe,
  91         .remove = __devexit_p(sdhci_hlwd_remove),
  92 #ifdef CONFIG_PM
  93         .suspend = sdhci_pltfm_suspend,
  94         .resume = sdhci_pltfm_resume,
  95 #endif
  96 };
  97
  98 static int __init sdhci_hlwd_init(void)
  99 {
 100         return platform_driver_register(&sdhci_hlwd_driver);
 101 }
 102 module_init(sdhci_hlwd_init);
 103
 104 static void __exit sdhci_hlwd_exit(void)
 105 {
 106         platform_driver_unregister(&sdhci_hlwd_driver);
 107 }
 108 module_exit(sdhci_hlwd_exit);
 109
 110 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
 111 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
 112 MODULE_LICENSE("GPL v2");