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-of.h"
  25 #include "sdhci.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
  36 static 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
  42 static 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
  48 static 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
  54 struct sdhci_of_data sdhci_hlwd = {
  55         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
  56                   SDHCI_QUIRK_32BIT_DMA_SIZE,
  57         .ops = {
  58                 .read_l = sdhci_be32bs_readl,
  59                 .read_w = sdhci_be32bs_readw,
  60                 .read_b = sdhci_be32bs_readb,
  61                 .write_l = sdhci_hlwd_writel,
  62                 .write_w = sdhci_hlwd_writew,
  63                 .write_b = sdhci_hlwd_writeb,
  64         },
  65 };