summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-w90x900/mfp.c
blob: a47dc9a708ee0a29aaa4c62009f0344c07c9e93b (plain)
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
158
/*
 * linux/arch/arm/mach-w90x900/mfp.c
 *
 * Copyright (c) 2008 Nuvoton technology corporation
 *
 * Wan ZongShun <mcuos.com@gmail.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;version 2 of the License.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <linux/io.h>

#include <mach/hardware.h>

#define REG_MFSEL	(W90X900_VA_GCR + 0xC)

#define GPSELF		(0x01 << 1)

#define GPSELC		(0x03 << 2)
#define ENKPI		(0x02 << 2)
#define ENNAND		(0x01 << 2)

#define GPSELEI0	(0x01 << 26)
#define GPSELEI1	(0x01 << 27)

#define GPIOG0TO1	(0x03 << 14)
#define GPIOG2TO3	(0x03 << 16)
#define ENSPI		(0x0a << 14)
#define ENI2C0		(0x01 << 14)
#define ENI2C1		(0x01 << 16)

static DEFINE_MUTEX(mfp_mutex);

void mfp_set_groupf(struct device *dev)
{
	unsigned long mfpen;
	const char *dev_id;

	BUG_ON(!dev);

	mutex_lock(&mfp_mutex);

	dev_id = dev_name(dev);

	mfpen = __raw_readl(REG_MFSEL);

	if (strcmp(dev_id, "nuc900-emc") == 0)
		mfpen |= GPSELF;/*enable mac*/
	else
		mfpen &= ~GPSELF;/*GPIOF[9:0]*/

	__raw_writel(mfpen, REG_MFSEL);

	mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupf);

void mfp_set_groupc(struct device *dev)
{
	unsigned long mfpen;
	const char *dev_id;

	BUG_ON(!dev);

	mutex_lock(&mfp_mutex);

	dev_id = dev_name(dev);

	mfpen = __raw_readl(REG_MFSEL);

	if (strcmp(dev_id, "nuc900-lcd") == 0)
		mfpen |= GPSELC;/*enable lcd*/
	else if (strcmp(dev_id, "nuc900-kpi") == 0) {
		mfpen &= (~GPSELC);/*enable kpi*/
		mfpen |= ENKPI;
	} else if (strcmp(dev_id, "nuc900-nand") == 0) {
		mfpen &= (~GPSELC);/*enable nand*/
		mfpen |= ENNAND;
	} else
		mfpen &= (~GPSELC);/*GPIOC[14:0]*/

	__raw_writel(mfpen, REG_MFSEL);

	mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupc);

void mfp_set_groupi(struct device *dev)
{
	unsigned long mfpen;
	const char *dev_id;

	BUG_ON(!dev);

	mutex_lock(&mfp_mutex);

	dev_id = dev_name(dev);

	mfpen = __raw_readl(REG_MFSEL);

	mfpen &= ~GPSELEI1;/*default gpio16*/

	if (strcmp(dev_id, "nuc900-wdog") == 0)
		mfpen |= GPSELEI1;/*enable wdog*/
	else if (strcmp(dev_id, "nuc900-atapi") == 0)
		mfpen |= GPSELEI0;/*enable atapi*/
	else if (strcmp(dev_id, "nuc900-keypad") == 0)
		mfpen &= ~GPSELEI0;/*enable keypad*/

	__raw_writel(mfpen, REG_MFSEL);

	mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupi);

void mfp_set_groupg(struct device *dev)
{
	unsigned long mfpen;
	const char *dev_id;

	BUG_ON(!dev);

	mutex_lock(&mfp_mutex);

	dev_id = dev_name(dev);

	mfpen = __raw_readl(REG_MFSEL);

	if (strcmp(dev_id, "nuc900-spi") == 0) {
		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
		mfpen |= ENSPI;/*enable spi*/
	} else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
		mfpen &= ~(GPIOG0TO1);
		mfpen |= ENI2C0;/*enable i2c0*/
	} else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
		mfpen &= ~(GPIOG2TO3);
		mfpen |= ENI2C1;/*enable i2c1*/
	} else {
		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
	}

	__raw_writel(mfpen, REG_MFSEL);

	mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupg);