GNU Linux-libre 4.19.314-gnu1
[releases.git] / arch / arm / mach-omap1 / io.c
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  */
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)
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
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)
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  */
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
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
148 u8 omap_readb(u32 pa)
149 {
150         return __raw_readb(OMAP1_IO_ADDRESS(pa));
151 }
152 EXPORT_SYMBOL(omap_readb);
153
154 u16 omap_readw(u32 pa)
155 {
156         return __raw_readw(OMAP1_IO_ADDRESS(pa));
157 }
158 EXPORT_SYMBOL(omap_readw);
159
160 u32 omap_readl(u32 pa)
161 {
162         return __raw_readl(OMAP1_IO_ADDRESS(pa));
163 }
164 EXPORT_SYMBOL(omap_readl);
165
166 void omap_writeb(u8 v, u32 pa)
167 {
168         __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
169 }
170 EXPORT_SYMBOL(omap_writeb);
171
172 void omap_writew(u16 v, u32 pa)
173 {
174         __raw_writew(v, OMAP1_IO_ADDRESS(pa));
175 }
176 EXPORT_SYMBOL(omap_writew);
177
178 void omap_writel(u32 v, u32 pa)
179 {
180         __raw_writel(v, OMAP1_IO_ADDRESS(pa));
181 }
182 EXPORT_SYMBOL(omap_writel);