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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * drivers/mmc/host/sdhci-of-hlwd.c
   4 *
   5 * Nintendo Wii Secure Digital Host Controller Interface.
   6 * Copyright (C) 2009 The GameCube Linux Team
   7 * Copyright (C) 2009 Albert Herranz
   8 *
   9 * Based on sdhci-of-esdhc.c
  10 *
  11 * Copyright (c) 2007 Freescale Semiconductor, Inc.
  12 * Copyright (c) 2009 MontaVista Software, Inc.
  13 *
  14 * Authors: Xiaobo Xie <X.Xie@freescale.com>
  15 *          Anton Vorontsov <avorontsov@ru.mvista.com>
  16 */
  17
  18#include <linux/delay.h>
  19#include <linux/module.h>
  20#include <linux/mmc/host.h>
  21#include "sdhci-pltfm.h"
  22
  23/*
  24 * Ops and quirks for the Nintendo Wii SDHCI controllers.
  25 */
  26
  27/*
  28 * We need a small delay after each write, or things go horribly wrong.
  29 */
  30#define SDHCI_HLWD_WRITE_DELAY  5 /* usecs */
  31
  32static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
  33{
  34        sdhci_be32bs_writel(host, val, reg);
  35        udelay(SDHCI_HLWD_WRITE_DELAY);
  36}
  37
  38static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
  39{
  40        sdhci_be32bs_writew(host, val, reg);
  41        udelay(SDHCI_HLWD_WRITE_DELAY);
  42}
  43
  44static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
  45{
  46        sdhci_be32bs_writeb(host, val, reg);
  47        udelay(SDHCI_HLWD_WRITE_DELAY);
  48}
  49
  50static const struct sdhci_ops sdhci_hlwd_ops = {
  51        .read_l = sdhci_be32bs_readl,
  52        .read_w = sdhci_be32bs_readw,
  53        .read_b = sdhci_be32bs_readb,
  54        .write_l = sdhci_hlwd_writel,
  55        .write_w = sdhci_hlwd_writew,
  56        .write_b = sdhci_hlwd_writeb,
  57        .set_clock = sdhci_set_clock,
  58        .set_bus_width = sdhci_set_bus_width,
  59        .reset = sdhci_reset,
  60        .set_uhs_signaling = sdhci_set_uhs_signaling,
  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, 0);
  72}
  73
  74static const struct of_device_id sdhci_hlwd_of_match[] = {
  75        { .compatible = "nintendo,hollywood-sdhci" },
  76        { }
  77};
  78MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
  79
  80static struct platform_driver sdhci_hlwd_driver = {
  81        .driver = {
  82                .name = "sdhci-hlwd",
  83                .of_match_table = sdhci_hlwd_of_match,
  84                .pm = &sdhci_pltfm_pmops,
  85        },
  86        .probe = sdhci_hlwd_probe,
  87        .remove = sdhci_pltfm_unregister,
  88};
  89
  90module_platform_driver(sdhci_hlwd_driver);
  91
  92MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
  93MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
  94MODULE_LICENSE("GPL v2");
  95