Root/arch/arm/mach-w90x900/mfp.c

1/*
2 * linux/arch/arm/mach-w90x900/mfp.c
3 *
4 * Copyright (c) 2008 Nuvoton technology corporation
5 *
6 * Wan ZongShun <mcuos.com@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation;version 2 of the License.
11 */
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/device.h>
16#include <linux/list.h>
17#include <linux/errno.h>
18#include <linux/err.h>
19#include <linux/string.h>
20#include <linux/clk.h>
21#include <linux/mutex.h>
22#include <linux/io.h>
23
24#include <mach/hardware.h>
25
26#define REG_MFSEL (W90X900_VA_GCR + 0xC)
27
28#define GPSELF (0x01 << 1)
29
30#define GPSELC (0x03 << 2)
31#define ENKPI (0x02 << 2)
32#define ENNAND (0x01 << 2)
33
34#define GPSELEI0 (0x01 << 26)
35#define GPSELEI1 (0x01 << 27)
36
37#define GPIOG0TO1 (0x03 << 14)
38#define GPIOG2TO3 (0x03 << 16)
39#define GPIOG22TO23 (0x03 << 22)
40
41#define ENSPI (0x0a << 14)
42#define ENI2C0 (0x01 << 14)
43#define ENI2C1 (0x01 << 16)
44#define ENAC97 (0x02 << 22)
45
46static DEFINE_MUTEX(mfp_mutex);
47
48void mfp_set_groupf(struct device *dev)
49{
50    unsigned long mfpen;
51    const char *dev_id;
52
53    BUG_ON(!dev);
54
55    mutex_lock(&mfp_mutex);
56
57    dev_id = dev_name(dev);
58
59    mfpen = __raw_readl(REG_MFSEL);
60
61    if (strcmp(dev_id, "nuc900-emc") == 0)
62        mfpen |= GPSELF;/*enable mac*/
63    else
64        mfpen &= ~GPSELF;/*GPIOF[9:0]*/
65
66    __raw_writel(mfpen, REG_MFSEL);
67
68    mutex_unlock(&mfp_mutex);
69}
70EXPORT_SYMBOL(mfp_set_groupf);
71
72void mfp_set_groupc(struct device *dev)
73{
74    unsigned long mfpen;
75    const char *dev_id;
76
77    BUG_ON(!dev);
78
79    mutex_lock(&mfp_mutex);
80
81    dev_id = dev_name(dev);
82
83    mfpen = __raw_readl(REG_MFSEL);
84
85    if (strcmp(dev_id, "nuc900-lcd") == 0)
86        mfpen |= GPSELC;/*enable lcd*/
87    else if (strcmp(dev_id, "nuc900-kpi") == 0) {
88        mfpen &= (~GPSELC);/*enable kpi*/
89        mfpen |= ENKPI;
90    } else if (strcmp(dev_id, "nuc900-nand") == 0) {
91        mfpen &= (~GPSELC);/*enable nand*/
92        mfpen |= ENNAND;
93    } else
94        mfpen &= (~GPSELC);/*GPIOC[14:0]*/
95
96    __raw_writel(mfpen, REG_MFSEL);
97
98    mutex_unlock(&mfp_mutex);
99}
100EXPORT_SYMBOL(mfp_set_groupc);
101
102void mfp_set_groupi(struct device *dev)
103{
104    unsigned long mfpen;
105    const char *dev_id;
106
107    BUG_ON(!dev);
108
109    mutex_lock(&mfp_mutex);
110
111    dev_id = dev_name(dev);
112
113    mfpen = __raw_readl(REG_MFSEL);
114
115    mfpen &= ~GPSELEI1;/*default gpio16*/
116
117    if (strcmp(dev_id, "nuc900-wdog") == 0)
118        mfpen |= GPSELEI1;/*enable wdog*/
119    else if (strcmp(dev_id, "nuc900-atapi") == 0)
120        mfpen |= GPSELEI0;/*enable atapi*/
121    else if (strcmp(dev_id, "nuc900-keypad") == 0)
122        mfpen &= ~GPSELEI0;/*enable keypad*/
123
124    __raw_writel(mfpen, REG_MFSEL);
125
126    mutex_unlock(&mfp_mutex);
127}
128EXPORT_SYMBOL(mfp_set_groupi);
129
130void mfp_set_groupg(struct device *dev)
131{
132    unsigned long mfpen;
133    const char *dev_id;
134
135    BUG_ON(!dev);
136
137    mutex_lock(&mfp_mutex);
138
139    dev_id = dev_name(dev);
140
141    mfpen = __raw_readl(REG_MFSEL);
142
143    if (strcmp(dev_id, "nuc900-spi") == 0) {
144        mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
145        mfpen |= ENSPI;/*enable spi*/
146    } else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
147        mfpen &= ~(GPIOG0TO1);
148        mfpen |= ENI2C0;/*enable i2c0*/
149    } else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
150        mfpen &= ~(GPIOG2TO3);
151        mfpen |= ENI2C1;/*enable i2c1*/
152    } else if (strcmp(dev_id, "nuc900-audio") == 0) {
153        mfpen &= ~(GPIOG22TO23);
154        mfpen |= ENAC97;/*enable AC97*/
155    } else {
156        mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
157    }
158
159    __raw_writel(mfpen, REG_MFSEL);
160
161    mutex_unlock(&mfp_mutex);
162}
163EXPORT_SYMBOL(mfp_set_groupg);
164
165

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