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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) |
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 | |
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37 | #define GPIOG0TO1 (0x03 << 14) |
38 | #define GPIOG2TO3 (0x03 << 16) |
39 | #define ENSPI (0x0a << 14) |
40 | #define ENI2C0 (0x01 << 14) |
41 | #define ENI2C1 (0x01 << 16) |
42 | |
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43 | static DEFINE_MUTEX(mfp_mutex); |
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44 | |
45 | void mfp_set_groupf(struct device *dev) |
46 | { |
47 | unsigned long mfpen; |
48 | const char *dev_id; |
49 | |
50 | BUG_ON(!dev); |
51 | |
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52 | mutex_lock(&mfp_mutex); |
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53 | |
54 | dev_id = dev_name(dev); |
55 | |
56 | mfpen = __raw_readl(REG_MFSEL); |
57 | |
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58 | if (strcmp(dev_id, "nuc900-emc") == 0) |
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59 | mfpen |= GPSELF;/*enable mac*/ |
60 | else |
61 | mfpen &= ~GPSELF;/*GPIOF[9:0]*/ |
62 | |
63 | __raw_writel(mfpen, REG_MFSEL); |
64 | |
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65 | mutex_unlock(&mfp_mutex); |
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66 | } |
67 | EXPORT_SYMBOL(mfp_set_groupf); |
68 | |
69 | void mfp_set_groupc(struct device *dev) |
70 | { |
71 | unsigned long mfpen; |
72 | const char *dev_id; |
73 | |
74 | BUG_ON(!dev); |
75 | |
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76 | mutex_lock(&mfp_mutex); |
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77 | |
78 | dev_id = dev_name(dev); |
79 | |
80 | mfpen = __raw_readl(REG_MFSEL); |
81 | |
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82 | if (strcmp(dev_id, "nuc900-lcd") == 0) |
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83 | mfpen |= GPSELC;/*enable lcd*/ |
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84 | else if (strcmp(dev_id, "nuc900-kpi") == 0) { |
85 | mfpen &= (~GPSELC);/*enable kpi*/ |
86 | mfpen |= ENKPI; |
87 | } else if (strcmp(dev_id, "nuc900-nand") == 0) { |
88 | mfpen &= (~GPSELC);/*enable nand*/ |
89 | mfpen |= ENNAND; |
90 | } else |
91 | mfpen &= (~GPSELC);/*GPIOC[14:0]*/ |
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92 | |
93 | __raw_writel(mfpen, REG_MFSEL); |
94 | |
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95 | mutex_unlock(&mfp_mutex); |
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96 | } |
97 | EXPORT_SYMBOL(mfp_set_groupc); |
98 | |
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99 | void mfp_set_groupi(struct device *dev) |
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100 | { |
101 | unsigned long mfpen; |
102 | const char *dev_id; |
103 | |
104 | BUG_ON(!dev); |
105 | |
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106 | mutex_lock(&mfp_mutex); |
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107 | |
108 | dev_id = dev_name(dev); |
109 | |
110 | mfpen = __raw_readl(REG_MFSEL); |
111 | |
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112 | mfpen &= ~GPSELEI1;/*default gpio16*/ |
113 | |
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114 | if (strcmp(dev_id, "nuc900-wdog") == 0) |
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115 | mfpen |= GPSELEI1;/*enable wdog*/ |
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116 | else if (strcmp(dev_id, "nuc900-atapi") == 0) |
117 | mfpen |= GPSELEI0;/*enable atapi*/ |
118 | else if (strcmp(dev_id, "nuc900-keypad") == 0) |
119 | mfpen &= ~GPSELEI0;/*enable keypad*/ |
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120 | |
121 | __raw_writel(mfpen, REG_MFSEL); |
122 | |
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123 | mutex_unlock(&mfp_mutex); |
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124 | } |
125 | EXPORT_SYMBOL(mfp_set_groupi); |
126 | |
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127 | void mfp_set_groupg(struct device *dev) |
128 | { |
129 | unsigned long mfpen; |
130 | const char *dev_id; |
131 | |
132 | BUG_ON(!dev); |
133 | |
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134 | mutex_lock(&mfp_mutex); |
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135 | |
136 | dev_id = dev_name(dev); |
137 | |
138 | mfpen = __raw_readl(REG_MFSEL); |
139 | |
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140 | if (strcmp(dev_id, "nuc900-spi") == 0) { |
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141 | mfpen &= ~(GPIOG0TO1 | GPIOG2TO3); |
142 | mfpen |= ENSPI;/*enable spi*/ |
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143 | } else if (strcmp(dev_id, "nuc900-i2c0") == 0) { |
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144 | mfpen &= ~(GPIOG0TO1); |
145 | mfpen |= ENI2C0;/*enable i2c0*/ |
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146 | } else if (strcmp(dev_id, "nuc900-i2c1") == 0) { |
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147 | mfpen &= ~(GPIOG2TO3); |
148 | mfpen |= ENI2C1;/*enable i2c1*/ |
149 | } else { |
150 | mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/ |
151 | } |
152 | |
153 | __raw_writel(mfpen, REG_MFSEL); |
154 | |
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155 | mutex_unlock(&mfp_mutex); |
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156 | } |
157 | EXPORT_SYMBOL(mfp_set_groupg); |
158 | |