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