[go: nahoru, domu]
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/module.h>
24#include <linux/mmc/host.h>
25#include "sdhci-pltfm.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
36static 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
42static 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
48static 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
54static const struct sdhci_ops sdhci_hlwd_ops = {
55	.read_l = sdhci_be32bs_readl,
56	.read_w = sdhci_be32bs_readw,
57	.read_b = sdhci_be32bs_readb,
58	.write_l = sdhci_hlwd_writel,
59	.write_w = sdhci_hlwd_writew,
60	.write_b = sdhci_hlwd_writeb,
61	.set_clock = sdhci_set_clock,
62	.set_bus_width = sdhci_set_bus_width,
63	.reset = sdhci_reset,
64	.set_uhs_signaling = sdhci_set_uhs_signaling,
65};
66
67static const struct sdhci_pltfm_data sdhci_hlwd_pdata = {
68	.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
69		  SDHCI_QUIRK_32BIT_DMA_SIZE,
70	.ops = &sdhci_hlwd_ops,
71};
72
73static int sdhci_hlwd_probe(struct platform_device *pdev)
74{
75	return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata, 0);
76}
77
78static int sdhci_hlwd_remove(struct platform_device *pdev)
79{
80	return sdhci_pltfm_unregister(pdev);
81}
82
83static const struct of_device_id sdhci_hlwd_of_match[] = {
84	{ .compatible = "nintendo,hollywood-sdhci" },
85	{ }
86};
87MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
88
89static struct platform_driver sdhci_hlwd_driver = {
90	.driver = {
91		.name = "sdhci-hlwd",
92		.of_match_table = sdhci_hlwd_of_match,
93		.pm = SDHCI_PLTFM_PMOPS,
94	},
95	.probe = sdhci_hlwd_probe,
96	.remove = sdhci_hlwd_remove,
97};
98
99module_platform_driver(sdhci_hlwd_driver);
100
101MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
102MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
103MODULE_LICENSE("GPL v2");
104