2 * linux/arch/arm/mach-w90x900/mfp.c
4 * Copyright (c) 2008 Nuvoton technology corporation
6 * Wan ZongShun <mcuos.com@gmail.com>
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.
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>
24 #include <mach/hardware.h>
26 #define REG_MFSEL (W90X900_VA_GCR + 0xC)
28 #define GPSELF (0x01 << 1)
29 #define GPSELC (0x03 << 2)
30 #define GPSELD (0x0f << 4)
32 #define GPSELEI0 (0x01 << 26)
33 #define GPSELEI1 (0x01 << 27)
35 #define GPIOG0TO1 (0x03 << 14)
36 #define GPIOG2TO3 (0x03 << 16)
37 #define GPIOG22TO23 (0x03 << 22)
38 #define GPIOG18TO20 (0x07 << 18)
40 #define ENSPI (0x0a << 14)
41 #define ENI2C0 (0x01 << 14)
42 #define ENI2C1 (0x01 << 16)
43 #define ENAC97 (0x02 << 22)
44 #define ENSD1 (0x02 << 18)
45 #define ENSD0 (0x0a << 4)
46 #define ENKPI (0x02 << 2)
47 #define ENNAND (0x01 << 2)
49 static DEFINE_MUTEX(mfp_mutex);
51 void mfp_set_groupf(struct device *dev)
58 mutex_lock(&mfp_mutex);
60 dev_id = dev_name(dev);
62 mfpen = __raw_readl(REG_MFSEL);
64 if (strcmp(dev_id, "nuc900-emc") == 0)
65 mfpen |= GPSELF;/*enable mac*/
67 mfpen &= ~GPSELF;/*GPIOF[9:0]*/
69 __raw_writel(mfpen, REG_MFSEL);
71 mutex_unlock(&mfp_mutex);
73 EXPORT_SYMBOL(mfp_set_groupf);
75 void mfp_set_groupc(struct device *dev)
82 mutex_lock(&mfp_mutex);
84 dev_id = dev_name(dev);
86 mfpen = __raw_readl(REG_MFSEL);
88 if (strcmp(dev_id, "nuc900-lcd") == 0)
89 mfpen |= GPSELC;/*enable lcd*/
90 else if (strcmp(dev_id, "nuc900-kpi") == 0) {
91 mfpen &= (~GPSELC);/*enable kpi*/
93 } else if (strcmp(dev_id, "nuc900-nand") == 0) {
94 mfpen &= (~GPSELC);/*enable nand*/
97 mfpen &= (~GPSELC);/*GPIOC[14:0]*/
99 __raw_writel(mfpen, REG_MFSEL);
101 mutex_unlock(&mfp_mutex);
103 EXPORT_SYMBOL(mfp_set_groupc);
105 void mfp_set_groupi(struct device *dev)
112 mutex_lock(&mfp_mutex);
114 dev_id = dev_name(dev);
116 mfpen = __raw_readl(REG_MFSEL);
118 mfpen &= ~GPSELEI1;/*default gpio16*/
120 if (strcmp(dev_id, "nuc900-wdog") == 0)
121 mfpen |= GPSELEI1;/*enable wdog*/
122 else if (strcmp(dev_id, "nuc900-atapi") == 0)
123 mfpen |= GPSELEI0;/*enable atapi*/
124 else if (strcmp(dev_id, "nuc900-keypad") == 0)
125 mfpen &= ~GPSELEI0;/*enable keypad*/
127 __raw_writel(mfpen, REG_MFSEL);
129 mutex_unlock(&mfp_mutex);
131 EXPORT_SYMBOL(mfp_set_groupi);
133 void mfp_set_groupg(struct device *dev, const char *subname)
138 BUG_ON((!dev) && (!subname));
140 mutex_lock(&mfp_mutex);
145 dev_id = dev_name(dev);
147 mfpen = __raw_readl(REG_MFSEL);
149 if (strcmp(dev_id, "nuc900-spi") == 0) {
150 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
151 mfpen |= ENSPI;/*enable spi*/
152 } else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
153 mfpen &= ~(GPIOG0TO1);
154 mfpen |= ENI2C0;/*enable i2c0*/
155 } else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
156 mfpen &= ~(GPIOG2TO3);
157 mfpen |= ENI2C1;/*enable i2c1*/
158 } else if (strcmp(dev_id, "nuc900-ac97") == 0) {
159 mfpen &= ~(GPIOG22TO23);
160 mfpen |= ENAC97;/*enable AC97*/
161 } else if (strcmp(dev_id, "nuc900-mmc-port1") == 0) {
162 mfpen &= ~(GPIOG18TO20);
163 mfpen |= (ENSD1 | 0x01);/*enable sd1*/
165 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
168 __raw_writel(mfpen, REG_MFSEL);
170 mutex_unlock(&mfp_mutex);
172 EXPORT_SYMBOL(mfp_set_groupg);
174 void mfp_set_groupd(struct device *dev, const char *subname)
179 BUG_ON((!dev) && (!subname));
181 mutex_lock(&mfp_mutex);
186 dev_id = dev_name(dev);
188 mfpen = __raw_readl(REG_MFSEL);
190 if (strcmp(dev_id, "nuc900-mmc-port0") == 0) {
191 mfpen &= ~GPSELD;/*enable sd0*/
196 __raw_writel(mfpen, REG_MFSEL);
198 mutex_unlock(&mfp_mutex);
200 EXPORT_SYMBOL(mfp_set_groupd);