[OMAP850] Changes to base IO subsystem, v2
[linux-2.6.git] / arch / arm / mach-omap1 / io.c
1 /*
2  * linux/arch/arm/mach-omap1/io.c
3  *
4  * OMAP1 I/O mapping code
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15
16 #include <asm/tlb.h>
17 #include <asm/mach/map.h>
18 #include <mach/mux.h>
19 #include <mach/tc.h>
20
21 extern int omap1_clk_init(void);
22 extern void omap_check_revision(void);
23 extern void omap_sram_init(void);
24 extern void omapfb_reserve_sdram(void);
25
26 /*
27  * The machine specific code may provide the extra mapping besides the
28  * default mapping provided here.
29  */
30 static struct map_desc omap_io_desc[] __initdata = {
31         {
32                 .virtual        = IO_VIRT,
33                 .pfn            = __phys_to_pfn(IO_PHYS),
34                 .length         = IO_SIZE,
35                 .type           = MT_DEVICE
36         }
37 };
38
39 #ifdef CONFIG_ARCH_OMAP730
40 static struct map_desc omap730_io_desc[] __initdata = {
41         {
42                 .virtual        = OMAP730_DSP_BASE,
43                 .pfn            = __phys_to_pfn(OMAP730_DSP_START),
44                 .length         = OMAP730_DSP_SIZE,
45                 .type           = MT_DEVICE
46         }, {
47                 .virtual        = OMAP730_DSPREG_BASE,
48                 .pfn            = __phys_to_pfn(OMAP730_DSPREG_START),
49                 .length         = OMAP730_DSPREG_SIZE,
50                 .type           = MT_DEVICE
51         }
52 };
53 #endif
54
55 #ifdef CONFIG_ARCH_OMAP850
56 static struct map_desc omap850_io_desc[] __initdata = {
57         {
58                 .virtual        = OMAP850_DSP_BASE,
59                 .pfn            = __phys_to_pfn(OMAP850_DSP_START),
60                 .length         = OMAP850_DSP_SIZE,
61                 .type           = MT_DEVICE
62         }, {
63                 .virtual        = OMAP850_DSPREG_BASE,
64                 .pfn            = __phys_to_pfn(OMAP850_DSPREG_START),
65                 .length         = OMAP850_DSPREG_SIZE,
66                 .type           = MT_DEVICE
67         }
68 };
69 #endif
70
71 #ifdef CONFIG_ARCH_OMAP15XX
72 static struct map_desc omap1510_io_desc[] __initdata = {
73         {
74                 .virtual        = OMAP1510_DSP_BASE,
75                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
76                 .length         = OMAP1510_DSP_SIZE,
77                 .type           = MT_DEVICE
78         }, {
79                 .virtual        = OMAP1510_DSPREG_BASE,
80                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
81                 .length         = OMAP1510_DSPREG_SIZE,
82                 .type           = MT_DEVICE
83         }
84 };
85 #endif
86
87 #if defined(CONFIG_ARCH_OMAP16XX)
88 static struct map_desc omap16xx_io_desc[] __initdata = {
89         {
90                 .virtual        = OMAP16XX_DSP_BASE,
91                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
92                 .length         = OMAP16XX_DSP_SIZE,
93                 .type           = MT_DEVICE
94         }, {
95                 .virtual        = OMAP16XX_DSPREG_BASE,
96                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
97                 .length         = OMAP16XX_DSPREG_SIZE,
98                 .type           = MT_DEVICE
99         }
100 };
101 #endif
102
103 /*
104  * Maps common IO regions for omap1. This should only get called from
105  * board specific init.
106  */
107 void __init omap1_map_common_io(void)
108 {
109         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
110
111         /* Normally devicemaps_init() would flush caches and tlb after
112          * mdesc->map_io(), but we must also do it here because of the CPU
113          * revision check below.
114          */
115         local_flush_tlb_all();
116         flush_cache_all();
117
118         /* We want to check CPU revision early for cpu_is_omapxxxx() macros.
119          * IO space mapping must be initialized before we can do that.
120          */
121         omap_check_revision();
122
123 #ifdef CONFIG_ARCH_OMAP730
124         if (cpu_is_omap730()) {
125                 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
126         }
127 #endif
128
129 #ifdef CONFIG_ARCH_OMAP850
130         if (cpu_is_omap850()) {
131                 iotable_init(omap850_io_desc, ARRAY_SIZE(omap850_io_desc));
132         }
133 #endif
134
135 #ifdef CONFIG_ARCH_OMAP15XX
136         if (cpu_is_omap15xx()) {
137                 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
138         }
139 #endif
140 #if defined(CONFIG_ARCH_OMAP16XX)
141         if (cpu_is_omap16xx()) {
142                 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
143         }
144 #endif
145
146         omap_sram_init();
147         omapfb_reserve_sdram();
148 }
149
150 /*
151  * Common low-level hardware init for omap1. This should only get called from
152  * board specific init.
153  */
154 void __init omap1_init_common_hw(void)
155 {
156         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
157          * on a Posted Write in the TIPB Bridge".
158          */
159         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
160         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
161
162         /* Must init clocks early to assure that timer interrupt works
163          */
164         omap1_clk_init();
165
166         omap1_mux_init();
167 }
168