2 * linux/arch/arm/mach-omap1/io.c
4 * OMAP1 I/O mapping code
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.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
17 #include <asm/mach/map.h>
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);
27 * The machine specific code may provide the extra mapping besides the
28 * default mapping provided here.
30 static struct map_desc omap_io_desc[] __initdata = {
32 .virtual = OMAP1_IO_VIRT,
33 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
34 .length = OMAP1_IO_SIZE,
39 #ifdef CONFIG_ARCH_OMAP730
40 static struct map_desc omap730_io_desc[] __initdata = {
42 .virtual = OMAP730_DSP_BASE,
43 .pfn = __phys_to_pfn(OMAP730_DSP_START),
44 .length = OMAP730_DSP_SIZE,
47 .virtual = OMAP730_DSPREG_BASE,
48 .pfn = __phys_to_pfn(OMAP730_DSPREG_START),
49 .length = OMAP730_DSPREG_SIZE,
55 #ifdef CONFIG_ARCH_OMAP850
56 static struct map_desc omap850_io_desc[] __initdata = {
58 .virtual = OMAP850_DSP_BASE,
59 .pfn = __phys_to_pfn(OMAP850_DSP_START),
60 .length = OMAP850_DSP_SIZE,
63 .virtual = OMAP850_DSPREG_BASE,
64 .pfn = __phys_to_pfn(OMAP850_DSPREG_START),
65 .length = OMAP850_DSPREG_SIZE,
71 #ifdef CONFIG_ARCH_OMAP15XX
72 static struct map_desc omap1510_io_desc[] __initdata = {
74 .virtual = OMAP1510_DSP_BASE,
75 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
76 .length = OMAP1510_DSP_SIZE,
79 .virtual = OMAP1510_DSPREG_BASE,
80 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
81 .length = OMAP1510_DSPREG_SIZE,
87 #if defined(CONFIG_ARCH_OMAP16XX)
88 static struct map_desc omap16xx_io_desc[] __initdata = {
90 .virtual = OMAP16XX_DSP_BASE,
91 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
92 .length = OMAP16XX_DSP_SIZE,
95 .virtual = OMAP16XX_DSPREG_BASE,
96 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
97 .length = OMAP16XX_DSPREG_SIZE,
104 * Maps common IO regions for omap1. This should only get called from
105 * board specific init.
107 void __init omap1_map_common_io(void)
109 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
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.
115 local_flush_tlb_all();
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.
121 omap_check_revision();
123 #ifdef CONFIG_ARCH_OMAP730
124 if (cpu_is_omap730()) {
125 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
129 #ifdef CONFIG_ARCH_OMAP850
130 if (cpu_is_omap850()) {
131 iotable_init(omap850_io_desc, ARRAY_SIZE(omap850_io_desc));
135 #ifdef CONFIG_ARCH_OMAP15XX
136 if (cpu_is_omap15xx()) {
137 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
140 #if defined(CONFIG_ARCH_OMAP16XX)
141 if (cpu_is_omap16xx()) {
142 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
147 omapfb_reserve_sdram();
151 * Common low-level hardware init for omap1. This should only get called from
152 * board specific init.
154 void __init omap1_init_common_hw(void)
156 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
157 * on a Posted Write in the TIPB Bridge".
159 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
160 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
162 /* Must init clocks early to assure that timer interrupt works