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-rw-r--r--arch/arm/plat-omap/mux.c174
1 files changed, 22 insertions, 152 deletions
diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
index 75211f20ccb3..6f3f459731c8 100644
--- a/arch/arm/plat-omap/mux.c
+++ b/arch/arm/plat-omap/mux.c
@@ -3,9 +3,9 @@
3 * 3 *
4 * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h 4 * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h
5 * 5 *
6 * Copyright (C) 2003 - 2005 Nokia Corporation 6 * Copyright (C) 2003 - 2008 Nokia Corporation
7 * 7 *
8 * Written by Tony Lindgren <tony.lindgren@nokia.com> 8 * Written by Tony Lindgren
9 * 9 *
10 * This program is free software; you can redistribute it and/or modify 10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by 11 * it under the terms of the GNU General Public License as published by
@@ -32,21 +32,17 @@
32 32
33#ifdef CONFIG_OMAP_MUX 33#ifdef CONFIG_OMAP_MUX
34 34
35#define OMAP24XX_L4_BASE 0x48000000 35static struct omap_mux_cfg *mux_cfg;
36#define OMAP24XX_PULL_ENA (1 << 3)
37#define OMAP24XX_PULL_UP (1 << 4)
38 36
39static struct pin_config * pin_table; 37int __init omap_mux_register(struct omap_mux_cfg *arch_mux_cfg)
40static unsigned long pin_table_sz;
41
42extern struct pin_config * omap730_pins;
43extern struct pin_config * omap1xxx_pins;
44extern struct pin_config * omap24xx_pins;
45
46int __init omap_mux_register(struct pin_config * pins, unsigned long size)
47{ 38{
48 pin_table = pins; 39 if (!arch_mux_cfg || !arch_mux_cfg->pins || arch_mux_cfg->size == 0
49 pin_table_sz = size; 40 || !arch_mux_cfg->cfg_reg) {
41 printk(KERN_ERR "Invalid pin table\n");
42 return -EINVAL;
43 }
44
45 mux_cfg = arch_mux_cfg;
50 46
51 return 0; 47 return 0;
52} 48}
@@ -56,152 +52,26 @@ int __init omap_mux_register(struct pin_config * pins, unsigned long size)
56 */ 52 */
57int __init_or_module omap_cfg_reg(const unsigned long index) 53int __init_or_module omap_cfg_reg(const unsigned long index)
58{ 54{
59 static DEFINE_SPINLOCK(mux_spin_lock); 55 struct pin_config *reg;
60
61 unsigned long flags;
62 struct pin_config *cfg;
63 unsigned int reg_orig = 0, reg = 0, pu_pd_orig = 0, pu_pd = 0,
64 pull_orig = 0, pull = 0;
65 unsigned int mask, warn = 0;
66 56
67 if (!pin_table) 57 if (mux_cfg == NULL) {
68 BUG(); 58 printk(KERN_ERR "Pin mux table not initialized\n");
59 return -ENODEV;
60 }
69 61
70 if (index >= pin_table_sz) { 62 if (index >= mux_cfg->size) {
71 printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n", 63 printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n",
72 index, pin_table_sz); 64 index, mux_cfg->size);
73 dump_stack(); 65 dump_stack();
74 return -ENODEV; 66 return -ENODEV;
75 } 67 }
76 68
77 cfg = (struct pin_config *)&pin_table[index]; 69 reg = (struct pin_config *)&mux_cfg->pins[index];
78 if (cpu_is_omap24xx()) {
79 u8 reg = 0;
80
81 reg |= cfg->mask & 0x7;
82 if (cfg->pull_val)
83 reg |= OMAP24XX_PULL_ENA;
84 if(cfg->pu_pd_val)
85 reg |= OMAP24XX_PULL_UP;
86#if defined(CONFIG_OMAP_MUX_DEBUG) || defined(CONFIG_OMAP_MUX_WARNINGS)
87 {
88 u8 orig = omap_readb(OMAP24XX_L4_BASE + cfg->mux_reg);
89 u8 debug = 0;
90
91#ifdef CONFIG_OMAP_MUX_DEBUG
92 debug = cfg->debug;
93#endif
94 warn = (orig != reg);
95 if (debug || warn)
96 printk("MUX: setup %s (0x%08x): 0x%02x -> 0x%02x\n",
97 cfg->name,
98 OMAP24XX_L4_BASE + cfg->mux_reg,
99 orig, reg);
100 }
101#endif
102 omap_writeb(reg, OMAP24XX_L4_BASE + cfg->mux_reg);
103 70
104 return 0; 71 if (!mux_cfg->cfg_reg)
105 } 72 return -ENODEV;
106
107 /* Check the mux register in question */
108 if (cfg->mux_reg) {
109 unsigned tmp1, tmp2;
110
111 spin_lock_irqsave(&mux_spin_lock, flags);
112 reg_orig = omap_readl(cfg->mux_reg);
113
114 /* The mux registers always seem to be 3 bits long */
115 mask = (0x7 << cfg->mask_offset);
116 tmp1 = reg_orig & mask;
117 reg = reg_orig & ~mask;
118
119 tmp2 = (cfg->mask << cfg->mask_offset);
120 reg |= tmp2;
121
122 if (tmp1 != tmp2)
123 warn = 1;
124
125 omap_writel(reg, cfg->mux_reg);
126 spin_unlock_irqrestore(&mux_spin_lock, flags);
127 }
128
129 /* Check for pull up or pull down selection on 1610 */
130 if (!cpu_is_omap15xx()) {
131 if (cfg->pu_pd_reg && cfg->pull_val) {
132 spin_lock_irqsave(&mux_spin_lock, flags);
133 pu_pd_orig = omap_readl(cfg->pu_pd_reg);
134 mask = 1 << cfg->pull_bit;
135
136 if (cfg->pu_pd_val) {
137 if (!(pu_pd_orig & mask))
138 warn = 1;
139 /* Use pull up */
140 pu_pd = pu_pd_orig | mask;
141 } else {
142 if (pu_pd_orig & mask)
143 warn = 1;
144 /* Use pull down */
145 pu_pd = pu_pd_orig & ~mask;
146 }
147 omap_writel(pu_pd, cfg->pu_pd_reg);
148 spin_unlock_irqrestore(&mux_spin_lock, flags);
149 }
150 }
151
152 /* Check for an associated pull down register */
153 if (cfg->pull_reg) {
154 spin_lock_irqsave(&mux_spin_lock, flags);
155 pull_orig = omap_readl(cfg->pull_reg);
156 mask = 1 << cfg->pull_bit;
157
158 if (cfg->pull_val) {
159 if (pull_orig & mask)
160 warn = 1;
161 /* Low bit = pull enabled */
162 pull = pull_orig & ~mask;
163 } else {
164 if (!(pull_orig & mask))
165 warn = 1;
166 /* High bit = pull disabled */
167 pull = pull_orig | mask;
168 }
169
170 omap_writel(pull, cfg->pull_reg);
171 spin_unlock_irqrestore(&mux_spin_lock, flags);
172 }
173
174 if (warn) {
175#ifdef CONFIG_OMAP_MUX_WARNINGS
176 printk(KERN_WARNING "MUX: initialized %s\n", cfg->name);
177#endif
178 }
179
180#ifdef CONFIG_OMAP_MUX_DEBUG
181 if (cfg->debug || warn) {
182 printk("MUX: Setting register %s\n", cfg->name);
183 printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
184 cfg->mux_reg_name, cfg->mux_reg, reg_orig, reg);
185
186 if (!cpu_is_omap15xx()) {
187 if (cfg->pu_pd_reg && cfg->pull_val) {
188 printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
189 cfg->pu_pd_name, cfg->pu_pd_reg,
190 pu_pd_orig, pu_pd);
191 }
192 }
193
194 if (cfg->pull_reg)
195 printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
196 cfg->pull_name, cfg->pull_reg, pull_orig, pull);
197 }
198#endif
199 73
200#ifdef CONFIG_OMAP_MUX_ERRORS 74 return mux_cfg->cfg_reg(reg);
201 return warn ? -ETXTBSY : 0;
202#else
203 return 0;
204#endif
205} 75}
206EXPORT_SYMBOL(omap_cfg_reg); 76EXPORT_SYMBOL(omap_cfg_reg);
207#else 77#else
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