LXR linux/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/module.h>
  24#include <linux/mmc/host.h>
  25#include "sdhci-pltfm.h"
  26
  27/*
  28 * Ops and quirks for the Nintendo Wii SDHCI controllers.
  29 */
  30
  31/*
  32 * We need a small delay after each write, or things go horribly wrong.
  33 */
  34#define SDHCI_HLWD_WRITE_DELAY  5 /* usecs */
  35
  36static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
  37{
  38        sdhci_be32bs_writel(host, val, reg);
  39        udelay(SDHCI_HLWD_WRITE_DELAY);
  40}
  41
  42static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
  43{
  44        sdhci_be32bs_writew(host, val, reg);
  45        udelay(SDHCI_HLWD_WRITE_DELAY);
  46}
  47
  48static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
  49{
  50        sdhci_be32bs_writeb(host, val, reg);
  51        udelay(SDHCI_HLWD_WRITE_DELAY);
  52}
  53
  54static const struct sdhci_ops sdhci_hlwd_ops = {
  55        .read_l = sdhci_be32bs_readl,
  56        .read_w = sdhci_be32bs_readw,
  57        .read_b = sdhci_be32bs_readb,
  58        .write_l = sdhci_hlwd_writel,
  59        .write_w = sdhci_hlwd_writew,
  60        .write_b = sdhci_hlwd_writeb,
  61};
  62
  63static const struct sdhci_pltfm_data sdhci_hlwd_pdata = {
  64        .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
  65                  SDHCI_QUIRK_32BIT_DMA_SIZE,
  66        .ops = &sdhci_hlwd_ops,
  67};
  68
  69static int sdhci_hlwd_probe(struct platform_device *pdev)
  70{
  71        return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata);
  72}
  73
  74static int sdhci_hlwd_remove(struct platform_device *pdev)
  75{
  76        return sdhci_pltfm_unregister(pdev);
  77}
  78
  79static const struct of_device_id sdhci_hlwd_of_match[] = {
  80        { .compatible = "nintendo,hollywood-sdhci" },
  81        { }
  82};
  83MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
  84
  85static struct platform_driver sdhci_hlwd_driver = {
  86        .driver = {
  87                .name = "sdhci-hlwd",
  88                .owner = THIS_MODULE,
  89                .of_match_table = sdhci_hlwd_of_match,
  90                .pm = SDHCI_PLTFM_PMOPS,
  91        },
  92        .probe = sdhci_hlwd_probe,
  93        .remove = sdhci_hlwd_remove,
  94};
  95
  96module_platform_driver(sdhci_hlwd_driver);
  97
  98MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
  99MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
 100MODULE_LICENSE("GPL v2");
 101