Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[linux-2.6.git] / drivers / mmc / host / sdhci-of-hlwd.c
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
36 static 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
42 static 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
48 static 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
54 static 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 };
62
63 static 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
69 static int __devinit sdhci_hlwd_probe(struct platform_device *pdev)
70 {
71         return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata);
72 }
73
74 static int __devexit sdhci_hlwd_remove(struct platform_device *pdev)
75 {
76         return sdhci_pltfm_unregister(pdev);
77 }
78
79 static const struct of_device_id sdhci_hlwd_of_match[] = {
80         { .compatible = "nintendo,hollywood-sdhci" },
81         { }
82 };
83 MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
84
85 static struct platform_driver sdhci_hlwd_driver = {
86         .driver = {
87                 .name = "sdhci-hlwd",
88                 .owner = THIS_MODULE,
89                 .of_match_table = sdhci_hlwd_of_match,
90                 .pm = SDHCI_PLTFM_PMOPS,
91         },
92         .probe = sdhci_hlwd_probe,
93         .remove = __devexit_p(sdhci_hlwd_remove),
94 };
95
96 static int __init sdhci_hlwd_init(void)
97 {
98         return platform_driver_register(&sdhci_hlwd_driver);
99 }
100 module_init(sdhci_hlwd_init);
101
102 static void __exit sdhci_hlwd_exit(void)
103 {
104         platform_driver_unregister(&sdhci_hlwd_driver);
105 }
106 module_exit(sdhci_hlwd_exit);
107
108 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
109 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
110 MODULE_LICENSE("GPL v2");