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 extern void omap_sram_init(void);
25
26 /*
27 * The machine specific code may provide the extra mapping besides the
28 * default mapping provided here.
29 */
30 static struct map_desc omap_io_desc[] __initdata = {
31 {
32 .virtual = OMAP1_IO_VIRT,
33 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
34 .length = OMAP1_IO_SIZE,
35 .type = MT_DEVICE
36 }
37 };
38
39 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
40 static struct map_desc omap7xx_io_desc[] __initdata = {
41 {
42 .virtual = OMAP7XX_DSP_BASE,
43 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
44 .length = OMAP7XX_DSP_SIZE,
45 .type = MT_DEVICE
46 }, {
47 .virtual = OMAP7XX_DSPREG_BASE,
48 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
49 .length = OMAP7XX_DSPREG_SIZE,
50 .type = MT_DEVICE
51 }
52 };
53 #endif
54
55 #ifdef CONFIG_ARCH_OMAP15XX
56 static struct map_desc omap1510_io_desc[] __initdata = {
57 {
58 .virtual = OMAP1510_DSP_BASE,
59 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
60 .length = OMAP1510_DSP_SIZE,
61 .type = MT_DEVICE
62 }, {
63 .virtual = OMAP1510_DSPREG_BASE,
64 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
65 .length = OMAP1510_DSPREG_SIZE,
66 .type = MT_DEVICE
67 }
68 };
69 #endif
70
71 #if defined(CONFIG_ARCH_OMAP16XX)
72 static struct map_desc omap16xx_io_desc[] __initdata = {
73 {
74 .virtual = OMAP16XX_DSP_BASE,
75 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
76 .length = OMAP16XX_DSP_SIZE,
77 .type = MT_DEVICE
78 }, {
79 .virtual = OMAP16XX_DSPREG_BASE,
80 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
81 .length = OMAP16XX_DSPREG_SIZE,
82 .type = MT_DEVICE
83 }
84 };
85 #endif
86
87 /*
88 * Maps common IO regions for omap1. This should only get called from
89 * board specific init.
90 */
omap1_map_common_io(void)91 void __init omap1_map_common_io(void)
92 {
93 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
94
95 /* Normally devicemaps_init() would flush caches and tlb after
96 * mdesc->map_io(), but we must also do it here because of the CPU
97 * revision check below.
98 */
99 local_flush_tlb_all();
100 flush_cache_all();
101
102 /* We want to check CPU revision early for cpu_is_omapxxxx() macros.
103 * IO space mapping must be initialized before we can do that.
104 */
105 omap_check_revision();
106
107 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
108 if (cpu_is_omap7xx()) {
109 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
110 }
111 #endif
112 #ifdef CONFIG_ARCH_OMAP15XX
113 if (cpu_is_omap15xx()) {
114 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
115 }
116 #endif
117 #if defined(CONFIG_ARCH_OMAP16XX)
118 if (cpu_is_omap16xx()) {
119 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
120 }
121 #endif
122
123 omap_sram_init();
124 }
125
126 /*
127 * Common low-level hardware init for omap1. This should only get called from
128 * board specific init.
129 */
omap1_init_common_hw(void)130 void __init omap1_init_common_hw(void)
131 {
132 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
133 * on a Posted Write in the TIPB Bridge".
134 */
135 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
136 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
137
138 /* Must init clocks early to assure that timer interrupt works
139 */
140 omap1_clk_init();
141
142 omap1_mux_init();
143 }
144
145 /*
146 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
147 */
148
omap_readb(u32 pa)149 u8 omap_readb(u32 pa)
150 {
151 return __raw_readb(OMAP1_IO_ADDRESS(pa));
152 }
153 EXPORT_SYMBOL(omap_readb);
154
omap_readw(u32 pa)155 u16 omap_readw(u32 pa)
156 {
157 return __raw_readw(OMAP1_IO_ADDRESS(pa));
158 }
159 EXPORT_SYMBOL(omap_readw);
160
omap_readl(u32 pa)161 u32 omap_readl(u32 pa)
162 {
163 return __raw_readl(OMAP1_IO_ADDRESS(pa));
164 }
165 EXPORT_SYMBOL(omap_readl);
166
omap_writeb(u8 v,u32 pa)167 void omap_writeb(u8 v, u32 pa)
168 {
169 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
170 }
171 EXPORT_SYMBOL(omap_writeb);
172
omap_writew(u16 v,u32 pa)173 void omap_writew(u16 v, u32 pa)
174 {
175 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
176 }
177 EXPORT_SYMBOL(omap_writew);
178
omap_writel(u32 v,u32 pa)179 void omap_writel(u32 v, u32 pa)
180 {
181 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
182 }
183 EXPORT_SYMBOL(omap_writel);
184