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>
23 extern void omap_check_revision(void);
26 * The machine specific code may provide the extra mapping besides the
27 * default mapping provided here.
29 static struct map_desc omap_io_desc[] __initdata = {
31 .virtual = OMAP1_IO_VIRT,
32 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
33 .length = OMAP1_IO_SIZE,
38 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
39 static struct map_desc omap7xx_io_desc[] __initdata = {
41 .virtual = OMAP7XX_DSP_BASE,
42 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
43 .length = OMAP7XX_DSP_SIZE,
46 .virtual = OMAP7XX_DSPREG_BASE,
47 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
48 .length = OMAP7XX_DSPREG_SIZE,
54 #ifdef CONFIG_ARCH_OMAP15XX
55 static struct map_desc omap1510_io_desc[] __initdata = {
57 .virtual = OMAP1510_DSP_BASE,
58 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
59 .length = OMAP1510_DSP_SIZE,
62 .virtual = OMAP1510_DSPREG_BASE,
63 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
64 .length = OMAP1510_DSPREG_SIZE,
70 #if defined(CONFIG_ARCH_OMAP16XX)
71 static struct map_desc omap16xx_io_desc[] __initdata = {
73 .virtual = OMAP16XX_DSP_BASE,
74 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
75 .length = OMAP16XX_DSP_SIZE,
78 .virtual = OMAP16XX_DSPREG_BASE,
79 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
80 .length = OMAP16XX_DSPREG_SIZE,
87 * Maps common IO regions for omap1
89 static void __init omap1_map_common_io(void)
91 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
94 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
95 void __init omap7xx_map_io(void)
97 omap1_map_common_io();
98 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
102 #ifdef CONFIG_ARCH_OMAP15XX
103 void __init omap15xx_map_io(void)
105 omap1_map_common_io();
106 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
110 #if defined(CONFIG_ARCH_OMAP16XX)
111 void __init omap16xx_map_io(void)
113 omap1_map_common_io();
114 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
119 * Common low-level hardware init for omap1.
121 void omap1_init_early(void)
123 omap_check_revision();
126 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
127 * on a Posted Write in the TIPB Bridge".
129 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
130 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
132 /* Must init clocks early to assure that timer interrupt works
139 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
142 u8 omap_readb(u32 pa)
144 return __raw_readb(OMAP1_IO_ADDRESS(pa));
146 EXPORT_SYMBOL(omap_readb);
148 u16 omap_readw(u32 pa)
150 return __raw_readw(OMAP1_IO_ADDRESS(pa));
152 EXPORT_SYMBOL(omap_readw);
154 u32 omap_readl(u32 pa)
156 return __raw_readl(OMAP1_IO_ADDRESS(pa));
158 EXPORT_SYMBOL(omap_readl);
160 void omap_writeb(u8 v, u32 pa)
162 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
164 EXPORT_SYMBOL(omap_writeb);
166 void omap_writew(u16 v, u32 pa)
168 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
170 EXPORT_SYMBOL(omap_writew);
172 void omap_writel(u32 v, u32 pa)
174 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
176 EXPORT_SYMBOL(omap_writel);