cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sdhci-of-hlwd.c (2480B)

      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		.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 = sdhci_pltfm_unregister,
     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");