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1 | /* |
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2 | * linux/arch/arm/mach-w90x900/mfp.c |
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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) |
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29 | #define GPSELC (0x03 << 2) |
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30 | #define GPSELD (0x0f << 4) |
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31 | |
32 | #define GPSELEI0 (0x01 << 26) |
33 | #define GPSELEI1 (0x01 << 27) |
34 | |
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35 | #define GPIOG0TO1 (0x03 << 14) |
36 | #define GPIOG2TO3 (0x03 << 16) |
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37 | #define GPIOG22TO23 (0x03 << 22) |
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38 | #define GPIOG18TO20 (0x07 << 18) |
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39 | |
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40 | #define ENSPI (0x0a << 14) |
41 | #define ENI2C0 (0x01 << 14) |
42 | #define ENI2C1 (0x01 << 16) |
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43 | #define ENAC97 (0x02 << 22) |
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44 | #define ENSD1 (0x02 << 18) |
45 | #define ENSD0 (0x0a << 4) |
46 | #define ENKPI (0x02 << 2) |
47 | #define ENNAND (0x01 << 2) |
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48 | |
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49 | static DEFINE_MUTEX(mfp_mutex); |
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50 | |
51 | void mfp_set_groupf(struct device *dev) |
52 | { |
53 | unsigned long mfpen; |
54 | const char *dev_id; |
55 | |
56 | BUG_ON(!dev); |
57 | |
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58 | mutex_lock(&mfp_mutex); |
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59 | |
60 | dev_id = dev_name(dev); |
61 | |
62 | mfpen = __raw_readl(REG_MFSEL); |
63 | |
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64 | if (strcmp(dev_id, "nuc900-emc") == 0) |
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65 | mfpen |= GPSELF;/*enable mac*/ |
66 | else |
67 | mfpen &= ~GPSELF;/*GPIOF[9:0]*/ |
68 | |
69 | __raw_writel(mfpen, REG_MFSEL); |
70 | |
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71 | mutex_unlock(&mfp_mutex); |
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72 | } |
73 | EXPORT_SYMBOL(mfp_set_groupf); |
74 | |
75 | void mfp_set_groupc(struct device *dev) |
76 | { |
77 | unsigned long mfpen; |
78 | const char *dev_id; |
79 | |
80 | BUG_ON(!dev); |
81 | |
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82 | mutex_lock(&mfp_mutex); |
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83 | |
84 | dev_id = dev_name(dev); |
85 | |
86 | mfpen = __raw_readl(REG_MFSEL); |
87 | |
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88 | if (strcmp(dev_id, "nuc900-lcd") == 0) |
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89 | mfpen |= GPSELC;/*enable lcd*/ |
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90 | else if (strcmp(dev_id, "nuc900-kpi") == 0) { |
91 | mfpen &= (~GPSELC);/*enable kpi*/ |
92 | mfpen |= ENKPI; |
93 | } else if (strcmp(dev_id, "nuc900-nand") == 0) { |
94 | mfpen &= (~GPSELC);/*enable nand*/ |
95 | mfpen |= ENNAND; |
96 | } else |
97 | mfpen &= (~GPSELC);/*GPIOC[14:0]*/ |
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98 | |
99 | __raw_writel(mfpen, REG_MFSEL); |
100 | |
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101 | mutex_unlock(&mfp_mutex); |
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102 | } |
103 | EXPORT_SYMBOL(mfp_set_groupc); |
104 | |
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105 | void mfp_set_groupi(struct device *dev) |
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106 | { |
107 | unsigned long mfpen; |
108 | const char *dev_id; |
109 | |
110 | BUG_ON(!dev); |
111 | |
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112 | mutex_lock(&mfp_mutex); |
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113 | |
114 | dev_id = dev_name(dev); |
115 | |
116 | mfpen = __raw_readl(REG_MFSEL); |
117 | |
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118 | mfpen &= ~GPSELEI1;/*default gpio16*/ |
119 | |
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120 | if (strcmp(dev_id, "nuc900-wdog") == 0) |
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121 | mfpen |= GPSELEI1;/*enable wdog*/ |
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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*/ |
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126 | |
127 | __raw_writel(mfpen, REG_MFSEL); |
128 | |
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129 | mutex_unlock(&mfp_mutex); |
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130 | } |
131 | EXPORT_SYMBOL(mfp_set_groupi); |
132 | |
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133 | void mfp_set_groupg(struct device *dev, const char *subname) |
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134 | { |
135 | unsigned long mfpen; |
136 | const char *dev_id; |
137 | |
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138 | BUG_ON((!dev) && (!subname)); |
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139 | |
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140 | mutex_lock(&mfp_mutex); |
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141 | |
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142 | if (subname != NULL) |
143 | dev_id = subname; |
144 | else |
145 | dev_id = dev_name(dev); |
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146 | |
147 | mfpen = __raw_readl(REG_MFSEL); |
148 | |
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149 | if (strcmp(dev_id, "nuc900-spi") == 0) { |
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150 | mfpen &= ~(GPIOG0TO1 | GPIOG2TO3); |
151 | mfpen |= ENSPI;/*enable spi*/ |
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152 | } else if (strcmp(dev_id, "nuc900-i2c0") == 0) { |
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153 | mfpen &= ~(GPIOG0TO1); |
154 | mfpen |= ENI2C0;/*enable i2c0*/ |
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155 | } else if (strcmp(dev_id, "nuc900-i2c1") == 0) { |
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156 | mfpen &= ~(GPIOG2TO3); |
157 | mfpen |= ENI2C1;/*enable i2c1*/ |
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158 | } else if (strcmp(dev_id, "nuc900-ac97") == 0) { |
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159 | mfpen &= ~(GPIOG22TO23); |
160 | mfpen |= ENAC97;/*enable AC97*/ |
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161 | } else if (strcmp(dev_id, "nuc900-mmc-port1") == 0) { |
162 | mfpen &= ~(GPIOG18TO20); |
163 | mfpen |= (ENSD1 | 0x01);/*enable sd1*/ |
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164 | } else { |
165 | mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/ |
166 | } |
167 | |
168 | __raw_writel(mfpen, REG_MFSEL); |
169 | |
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170 | mutex_unlock(&mfp_mutex); |
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171 | } |
172 | EXPORT_SYMBOL(mfp_set_groupg); |
173 | |
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174 | void mfp_set_groupd(struct device *dev, const char *subname) |
175 | { |
176 | unsigned long mfpen; |
177 | const char *dev_id; |
178 | |
179 | BUG_ON((!dev) && (!subname)); |
180 | |
181 | mutex_lock(&mfp_mutex); |
182 | |
183 | if (subname != NULL) |
184 | dev_id = subname; |
185 | else |
186 | dev_id = dev_name(dev); |
187 | |
188 | mfpen = __raw_readl(REG_MFSEL); |
189 | |
190 | if (strcmp(dev_id, "nuc900-mmc-port0") == 0) { |
191 | mfpen &= ~GPSELD;/*enable sd0*/ |
192 | mfpen |= ENSD0; |
193 | } else |
194 | mfpen &= (~GPSELD); |
195 | |
196 | __raw_writel(mfpen, REG_MFSEL); |
197 | |
198 | mutex_unlock(&mfp_mutex); |
199 | } |
200 | EXPORT_SYMBOL(mfp_set_groupd); |