xref: /openbmc/linux/drivers/mmc/host/sdhci-of-hlwd.c (revision dc297c92)

/*
 * drivers/mmc/host/sdhci-of-hlwd.c
 *
 * Nintendo Wii Secure Digital Host Controller Interface.
 * Copyright (C) 2009 The GameCube Linux Team
 * Copyright (C) 2009 Albert Herranz
 *
 * Based on sdhci-of-esdhc.c
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 * Copyright (c) 2009 MontaVista Software, Inc.
 *
 * Authors: Xiaobo Xie <X.Xie@freescale.com>
 *	    Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/delay.h>
#include <linux/mmc/host.h>
#include "sdhci-of.h"
#include "sdhci.h"

/*
 * Ops and quirks for the Nintendo Wii SDHCI controllers.
 */

/*
 * We need a small delay after each write, or things go horribly wrong.
 */
#define SDHCI_HLWD_WRITE_DELAY	5 /* usecs */

static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
{
	sdhci_be32bs_writel(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
{
	sdhci_be32bs_writew(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
{
	sdhci_be32bs_writeb(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

struct sdhci_of_data sdhci_hlwd = {
	.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
		  SDHCI_QUIRK_32BIT_DMA_SIZE,
	.ops = {
		.read_l = sdhci_be32bs_readl,
		.read_w = sdhci_be32bs_readw,
		.read_b = sdhci_be32bs_readb,
		.write_l = sdhci_hlwd_writel,
		.write_w = sdhci_hlwd_writew,
		.write_b = sdhci_hlwd_writeb,
	},
};