// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* drivers/mmc/host/sdhci-of-hlwd.c
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*
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* Nintendo Wii Secure Digital Host Controller Interface.
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* Copyright (C) 2009 The GameCube Linux Team
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* Copyright (C) 2009 Albert Herranz
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*
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* Based on sdhci-of-esdhc.c
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*
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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* Copyright (c) 2009 MontaVista Software, Inc.
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*
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* Authors: Xiaobo Xie <X.Xie@freescale.com>
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/mmc/host.h>
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#include "sdhci-pltfm.h"
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/*
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* Ops and quirks for the Nintendo Wii SDHCI controllers.
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*/
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/*
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* We need a small delay after each write, or things go horribly wrong.
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*/
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#define SDHCI_HLWD_WRITE_DELAY 5 /* usecs */
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static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
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{
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sdhci_be32bs_writel(host, val, reg);
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udelay(SDHCI_HLWD_WRITE_DELAY);
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}
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static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
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{
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sdhci_be32bs_writew(host, val, reg);
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udelay(SDHCI_HLWD_WRITE_DELAY);
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}
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static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
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{
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sdhci_be32bs_writeb(host, val, reg);
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udelay(SDHCI_HLWD_WRITE_DELAY);
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}
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static const struct sdhci_ops sdhci_hlwd_ops = {
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.read_l = sdhci_be32bs_readl,
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.read_w = sdhci_be32bs_readw,
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.read_b = sdhci_be32bs_readb,
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.write_l = sdhci_hlwd_writel,
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.write_w = sdhci_hlwd_writew,
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.write_b = sdhci_hlwd_writeb,
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.set_clock = sdhci_set_clock,
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.set_bus_width = sdhci_set_bus_width,
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.reset = sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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};
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static const struct sdhci_pltfm_data sdhci_hlwd_pdata = {
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.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
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SDHCI_QUIRK_32BIT_DMA_SIZE,
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.ops = &sdhci_hlwd_ops,
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};
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static int sdhci_hlwd_probe(struct platform_device *pdev)
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{
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return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata, 0);
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}
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static const struct of_device_id sdhci_hlwd_of_match[] = {
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{ .compatible = "nintendo,hollywood-sdhci" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
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static struct platform_driver sdhci_hlwd_driver = {
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.driver = {
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.name = "sdhci-hlwd",
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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.of_match_table = sdhci_hlwd_of_match,
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.pm = &sdhci_pltfm_pmops,
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},
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.probe = sdhci_hlwd_probe,
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.remove = sdhci_pltfm_unregister,
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};
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module_platform_driver(sdhci_hlwd_driver);
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MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
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MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
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MODULE_LICENSE("GPL v2");
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