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