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
19 #include <mach/mux.h>
20 #include <mach/tc.h>
21 #include <linux/omap-dma.h>
22
23 #include "iomap.h"
24 #include "common.h"
25 #include "clock.h"
26
27 /*
28 * The machine specific code may provide the extra mapping besides the
29 * default mapping provided here.
30 */
31 static struct map_desc omap_io_desc[] __initdata = {
32 {
33 .virtual = OMAP1_IO_VIRT,
34 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
35 .length = OMAP1_IO_SIZE,
36 .type = MT_DEVICE
37 }
38 };
39
40 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
41 static struct map_desc omap7xx_io_desc[] __initdata = {
42 {
43 .virtual = OMAP7XX_DSP_BASE,
44 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
45 .length = OMAP7XX_DSP_SIZE,
46 .type = MT_DEVICE
47 }, {
48 .virtual = OMAP7XX_DSPREG_BASE,
49 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
50 .length = OMAP7XX_DSPREG_SIZE,
51 .type = MT_DEVICE
52 }
53 };
54 #endif
55
56 #ifdef CONFIG_ARCH_OMAP15XX
57 static struct map_desc omap1510_io_desc[] __initdata = {
58 {
59 .virtual = OMAP1510_DSP_BASE,
60 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
61 .length = OMAP1510_DSP_SIZE,
62 .type = MT_DEVICE
63 }, {
64 .virtual = OMAP1510_DSPREG_BASE,
65 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
66 .length = OMAP1510_DSPREG_SIZE,
67 .type = MT_DEVICE
68 }
69 };
70 #endif
71
72 #if defined(CONFIG_ARCH_OMAP16XX)
73 static struct map_desc omap16xx_io_desc[] __initdata = {
74 {
75 .virtual = OMAP16XX_DSP_BASE,
76 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
77 .length = OMAP16XX_DSP_SIZE,
78 .type = MT_DEVICE
79 }, {
80 .virtual = OMAP16XX_DSPREG_BASE,
81 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
82 .length = OMAP16XX_DSPREG_SIZE,
83 .type = MT_DEVICE
84 }
85 };
86 #endif
87
88 /*
89 * Maps common IO regions for omap1
90 */
omap1_map_common_io(void)91 static void __init omap1_map_common_io(void)
92 {
93 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
94 }
95
96 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
omap7xx_map_io(void)97 void __init omap7xx_map_io(void)
98 {
99 omap1_map_common_io();
100 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
101 }
102 #endif
103
104 #ifdef CONFIG_ARCH_OMAP15XX
omap15xx_map_io(void)105 void __init omap15xx_map_io(void)
106 {
107 omap1_map_common_io();
108 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
109 }
110 #endif
111
112 #if defined(CONFIG_ARCH_OMAP16XX)
omap16xx_map_io(void)113 void __init omap16xx_map_io(void)
114 {
115 omap1_map_common_io();
116 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
117 }
118 #endif
119
120 /*
121 * Common low-level hardware init for omap1.
122 */
omap1_init_early(void)123 void __init omap1_init_early(void)
124 {
125 omap_check_revision();
126
127 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
128 * on a Posted Write in the TIPB Bridge".
129 */
130 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
131 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
132
133 /* Must init clocks early to assure that timer interrupt works
134 */
135 omap1_clk_init();
136 omap1_mux_init();
137 }
138
omap1_init_late(void)139 void __init omap1_init_late(void)
140 {
141 omap_serial_wakeup_init();
142 }
143
144 /*
145 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
146 */
147
omap_readb(u32 pa)148 u8 omap_readb(u32 pa)
149 {
150 return __raw_readb(OMAP1_IO_ADDRESS(pa));
151 }
152 EXPORT_SYMBOL(omap_readb);
153
omap_readw(u32 pa)154 u16 omap_readw(u32 pa)
155 {
156 return __raw_readw(OMAP1_IO_ADDRESS(pa));
157 }
158 EXPORT_SYMBOL(omap_readw);
159
omap_readl(u32 pa)160 u32 omap_readl(u32 pa)
161 {
162 return __raw_readl(OMAP1_IO_ADDRESS(pa));
163 }
164 EXPORT_SYMBOL(omap_readl);
165
omap_writeb(u8 v,u32 pa)166 void omap_writeb(u8 v, u32 pa)
167 {
168 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
169 }
170 EXPORT_SYMBOL(omap_writeb);
171
omap_writew(u16 v,u32 pa)172 void omap_writew(u16 v, u32 pa)
173 {
174 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
175 }
176 EXPORT_SYMBOL(omap_writew);
177
omap_writel(u32 v,u32 pa)178 void omap_writel(u32 v, u32 pa)
179 {
180 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
181 }
182 EXPORT_SYMBOL(omap_writel);
183