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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * drivers/mmc/host/sdhci-of-hlwd.c4 *5 * Nintendo Wii Secure Digital Host Controller Interface.6 * Copyright (C) 2009 The GameCube Linux Team7 * Copyright (C) 2009 Albert Herranz8 *9 * Based on sdhci-of-esdhc.c10 *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_init_and_add_host(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 .probe_type = PROBE_PREFER_ASYNCHRONOUS,84 .of_match_table = sdhci_hlwd_of_match,85 .pm = &sdhci_pltfm_pmops,86 },87 .probe = sdhci_hlwd_probe,88 .remove_new = sdhci_pltfm_remove,89};90 91module_platform_driver(sdhci_hlwd_driver);92 93MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");94MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");95MODULE_LICENSE("GPL v2");96