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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* SuperH Mobile SDHI
*
* Copyright (C) 2009 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Based on "Compaq ASIC3 support":
*
* Copyright 2001 Compaq Computer Corporation.
* Copyright 2004-2005 Phil Blundell
* Copyright 2007-2008 OpenedHand Ltd.
*
* Authors: Phil Blundell <pb@handhelds.org>,
* Samuel Ortiz <sameo@openedhand.com>
*
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/mfd/sh_mobile_sdhi.h>
struct sh_mobile_sdhi {
struct clk *clk;
struct tmio_mmc_data mmc_data;
struct mfd_cell cell_mmc;
};
static struct resource sh_mobile_sdhi_resources[] = {
{
.start = 0x000,
.end = 0x1ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0,
.end = 0,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell sh_mobile_sdhi_cell = {
.name = "tmio-mmc",
.num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
.resources = sh_mobile_sdhi_resources,
};
static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
{
struct platform_device *pdev = to_platform_device(tmio->dev.parent);
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
if (p && p->set_pwr)
p->set_pwr(pdev, state);
}
static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
{
struct sh_mobile_sdhi *priv;
struct resource *mem;
char clk_name[8];
int ret, irq;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem)
dev_err(&pdev->dev, "missing MEM resource\n");
irq = platform_get_irq(pdev, 0);
if (irq < 0)
dev_err(&pdev->dev, "missing IRQ resource\n");
if (!mem || (irq < 0))
return -EINVAL;
priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
if (priv == NULL) {
dev_err(&pdev->dev, "kzalloc failed\n");
return -ENOMEM;
}
snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
priv->clk = clk_get(&pdev->dev, clk_name);
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
ret = PTR_ERR(priv->clk);
kfree(priv);
return ret;
}
clk_enable(priv->clk);
priv->mmc_data.hclk = clk_get_rate(priv->clk);
priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
priv->mmc_data.capabilities = MMC_CAP_MMC_HIGHSPEED;
memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
priv->cell_mmc.driver_data = &priv->mmc_data;
priv->cell_mmc.platform_data = &priv->cell_mmc;
priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
platform_set_drvdata(pdev, priv);
ret = mfd_add_devices(&pdev->dev, pdev->id,
&priv->cell_mmc, 1, mem, irq);
if (ret) {
clk_disable(priv->clk);
clk_put(priv->clk);
kfree(priv);
}
return ret;
}
static int sh_mobile_sdhi_remove(struct platform_device *pdev)
{
struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
mfd_remove_devices(&pdev->dev);
clk_disable(priv->clk);
clk_put(priv->clk);
kfree(priv);
return 0;
}
static struct platform_driver sh_mobile_sdhi_driver = {
.driver = {
.name = "sh_mobile_sdhi",
.owner = THIS_MODULE,
},
.probe = sh_mobile_sdhi_probe,
.remove = __devexit_p(sh_mobile_sdhi_remove),
};
static int __init sh_mobile_sdhi_init(void)
{
return platform_driver_register(&sh_mobile_sdhi_driver);
}
static void __exit sh_mobile_sdhi_exit(void)
{
platform_driver_unregister(&sh_mobile_sdhi_driver);
}
module_init(sh_mobile_sdhi_init);
module_exit(sh_mobile_sdhi_exit);
MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
|
