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>
26 extern void omap_check_revision(void);
29 * The machine specific code may provide the extra mapping besides the
30 * default mapping provided here.
32 static struct map_desc omap_io_desc[] __initdata = {
34 .virtual = OMAP1_IO_VIRT,
35 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
36 .length = OMAP1_IO_SIZE,
41 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
42 static struct map_desc omap7xx_io_desc[] __initdata = {
44 .virtual = OMAP7XX_DSP_BASE,
45 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
46 .length = OMAP7XX_DSP_SIZE,
49 .virtual = OMAP7XX_DSPREG_BASE,
50 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
51 .length = OMAP7XX_DSPREG_SIZE,
57 #ifdef CONFIG_ARCH_OMAP15XX
58 static struct map_desc omap1510_io_desc[] __initdata = {
60 .virtual = OMAP1510_DSP_BASE,
61 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
62 .length = OMAP1510_DSP_SIZE,
65 .virtual = OMAP1510_DSPREG_BASE,
66 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
67 .length = OMAP1510_DSPREG_SIZE,
73 #if defined(CONFIG_ARCH_OMAP16XX)
74 static struct map_desc omap16xx_io_desc[] __initdata = {
76 .virtual = OMAP16XX_DSP_BASE,
77 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
78 .length = OMAP16XX_DSP_SIZE,
81 .virtual = OMAP16XX_DSPREG_BASE,
82 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
83 .length = OMAP16XX_DSPREG_SIZE,
90 * Maps common IO regions for omap1
92 static void __init omap1_map_common_io(void)
94 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
97 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
98 void __init omap7xx_map_io(void)
100 omap1_map_common_io();
101 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
105 #ifdef CONFIG_ARCH_OMAP15XX
106 void __init omap15xx_map_io(void)
108 omap1_map_common_io();
109 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
113 #if defined(CONFIG_ARCH_OMAP16XX)
114 void __init omap16xx_map_io(void)
116 omap1_map_common_io();
117 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
122 * Common low-level hardware init for omap1.
124 void __init omap1_init_early(void)
126 omap_check_revision();
128 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
129 * on a Posted Write in the TIPB Bridge".
131 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
132 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
134 /* Must init clocks early to assure that timer interrupt works
138 omap_init_consistent_dma_size();
142 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
145 u8 omap_readb(u32 pa)
147 return __raw_readb(OMAP1_IO_ADDRESS(pa));
149 EXPORT_SYMBOL(omap_readb);
151 u16 omap_readw(u32 pa)
153 return __raw_readw(OMAP1_IO_ADDRESS(pa));
155 EXPORT_SYMBOL(omap_readw);
157 u32 omap_readl(u32 pa)
159 return __raw_readl(OMAP1_IO_ADDRESS(pa));
161 EXPORT_SYMBOL(omap_readl);
163 void omap_writeb(u8 v, u32 pa)
165 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
167 EXPORT_SYMBOL(omap_writeb);
169 void omap_writew(u16 v, u32 pa)
171 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
173 EXPORT_SYMBOL(omap_writew);
175 void omap_writel(u32 v, u32 pa)
177 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
179 EXPORT_SYMBOL(omap_writel);