aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mmc/host/sdhci-of-hlwd.c
blob: 3619adc7d9fc36548283386f82e08be2d195a608 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/*
 * drivers/mmc/host/sdhci-of-hlwd.c
 *
 * Nintendo Wii Secure Digital Host Controller Interface.
 * Copyright (C) 2009 The GameCube Linux Team
 * Copyright (C) 2009 Albert Herranz
 *
 * Based on sdhci-of-esdhc.c
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 * Copyright (c) 2009 MontaVista Software, Inc.
 *
 * Authors: Xiaobo Xie <X.Xie@freescale.com>
 *	    Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
#include "sdhci-pltfm.h"

/*
 * Ops and quirks for the Nintendo Wii SDHCI controllers.
 */

/*
 * We need a small delay after each write, or things go horribly wrong.
 */
#define SDHCI_HLWD_WRITE_DELAY	5 /* usecs */

static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
{
	sdhci_be32bs_writel(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
{
	sdhci_be32bs_writew(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
{
	sdhci_be32bs_writeb(host, val, reg);
	udelay(SDHCI_HLWD_WRITE_DELAY);
}

static struct sdhci_ops sdhci_hlwd_ops = {
	.read_l = sdhci_be32bs_readl,
	.read_w = sdhci_be32bs_readw,
	.read_b = sdhci_be32bs_readb,
	.write_l = sdhci_hlwd_writel,
	.write_w = sdhci_hlwd_writew,
	.write_b = sdhci_hlwd_writeb,
};

static struct sdhci_pltfm_data sdhci_hlwd_pdata = {
	.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
		  SDHCI_QUIRK_32BIT_DMA_SIZE,
	.ops = &sdhci_hlwd_ops,
};

static int __devinit sdhci_hlwd_probe(struct platform_device *pdev)
{
	return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata);
}

static int __devexit sdhci_hlwd_remove(struct platform_device *pdev)
{
	return sdhci_pltfm_unregister(pdev);
}

static const struct of_device_id sdhci_hlwd_of_match[] = {
	{ .compatible = "nintendo,hollywood-sdhci" },
	{ }
};
MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);

static struct platform_driver sdhci_hlwd_driver = {
	.driver = {
		.name = "sdhci-hlwd",
		.owner = THIS_MODULE,
		.of_match_table = sdhci_hlwd_of_match,
		.pm = SDHCI_PLTFM_PMOPS,
	},
	.probe = sdhci_hlwd_probe,
	.remove = __devexit_p(sdhci_hlwd_remove),
};

static int __init sdhci_hlwd_init(void)
{
	return platform_driver_register(&sdhci_hlwd_driver);
}
module_init(sdhci_hlwd_init);

static void __exit sdhci_hlwd_exit(void)
{
	platform_driver_unregister(&sdhci_hlwd_driver);
}
module_exit(sdhci_hlwd_exit);

MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
MODULE_LICENSE("GPL v2");