Merge branch 'master'
[linux-2.6] / 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/config.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15
16 #include <asm/mach/map.h>
17 #include <asm/io.h>
18 #include <asm/arch/tc.h>
19
20 extern int clk_init(void);
21 extern void omap_check_revision(void);
22 extern void omap_sram_init(void);
23
24 /*
25  * The machine specific code may provide the extra mapping besides the
26  * default mapping provided here.
27  */
28 static struct map_desc omap_io_desc[] __initdata = {
29         {
30                 .virtual        = IO_VIRT,
31                 .pfn            = __phys_to_pfn(IO_PHYS),
32                 .length         = IO_SIZE,
33                 .type           = MT_DEVICE
34         }
35 };
36
37 #ifdef CONFIG_ARCH_OMAP730
38 static struct map_desc omap730_io_desc[] __initdata = {
39         {
40                 .virtual        = OMAP730_DSP_BASE,
41                 .pfn            = __phys_to_pfn(OMAP730_DSP_START),
42                 .length         = OMAP730_DSP_SIZE,
43                 .type           = MT_DEVICE
44         }, {
45                 .virtual        = OMAP730_DSPREG_BASE,
46                 .pfn            = __phys_to_pfn(OMAP730_DSPREG_START),
47                 .length         = OMAP730_DSPREG_SIZE,
48                 .type           = MT_DEVICE
49         }
50 };
51 #endif
52
53 #ifdef CONFIG_ARCH_OMAP1510
54 static struct map_desc omap1510_io_desc[] __initdata = {
55         {
56                 .virtual        = OMAP1510_DSP_BASE,
57                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
58                 .length         = OMAP1510_DSP_SIZE,
59                 .type           = MT_DEVICE
60         }, {
61                 .virtual        = OMAP1510_DSPREG_BASE,
62                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
63                 .length         = OMAP1510_DSPREG_SIZE,
64                 .type           = MT_DEVICE
65         }
66 };
67 #endif
68
69 #if defined(CONFIG_ARCH_OMAP16XX)
70 static struct map_desc omap16xx_io_desc[] __initdata = {
71         {
72                 .virtual        = OMAP16XX_DSP_BASE,
73                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
74                 .length         = OMAP16XX_DSP_SIZE,
75                 .type           = MT_DEVICE
76         }, {
77                 .virtual        = OMAP16XX_DSPREG_BASE,
78                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
79                 .length         = OMAP16XX_DSPREG_SIZE,
80                 .type           = MT_DEVICE
81         }
82 };
83 #endif
84
85 static int initialized = 0;
86
87 static void __init _omap_map_io(void)
88 {
89         initialized = 1;
90
91         /* We have to initialize the IO space mapping before we can run
92          * cpu_is_omapxxx() macros. */
93         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
94         omap_check_revision();
95
96 #ifdef CONFIG_ARCH_OMAP730
97         if (cpu_is_omap730()) {
98                 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
99         }
100 #endif
101 #ifdef CONFIG_ARCH_OMAP1510
102         if (cpu_is_omap1510()) {
103                 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
104         }
105 #endif
106 #if defined(CONFIG_ARCH_OMAP16XX)
107         if (cpu_is_omap16xx()) {
108                 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
109         }
110 #endif
111
112         omap_sram_init();
113
114         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
115          * on a Posted Write in the TIPB Bridge".
116          */
117         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
118         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
119
120         /* Must init clocks early to assure that timer interrupt works
121          */
122         clk_init();
123 }
124
125 /*
126  * This should only get called from board specific init
127  */
128 void __init omap_map_common_io(void)
129 {
130         if (!initialized)
131                 _omap_map_io();
132 }
133