1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/arch/arm/mach-omap1/io.c
4 *
5 * OMAP1 I/O mapping code
6 */
7
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/io.h>
12 #include <linux/omap-dma.h>
13
14 #include <asm/tlb.h>
15 #include <asm/mach/map.h>
16
17 #include "tc.h"
18 #include "iomap.h"
19 #include "common.h"
20
21 /*
22 * The machine specific code may provide the extra mapping besides the
23 * default mapping provided here.
24 */
25 static struct map_desc omap_io_desc[] __initdata = {
26 {
27 .virtual = OMAP1_IO_VIRT,
28 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
29 .length = OMAP1_IO_SIZE,
30 .type = MT_DEVICE
31 }
32 };
33
34 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
35 static struct map_desc omap7xx_io_desc[] __initdata = {
36 {
37 .virtual = OMAP7XX_DSP_BASE,
38 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
39 .length = OMAP7XX_DSP_SIZE,
40 .type = MT_DEVICE
41 }, {
42 .virtual = OMAP7XX_DSPREG_BASE,
43 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
44 .length = OMAP7XX_DSPREG_SIZE,
45 .type = MT_DEVICE
46 }
47 };
48 #endif
49
50 #ifdef CONFIG_ARCH_OMAP15XX
51 static struct map_desc omap1510_io_desc[] __initdata = {
52 {
53 .virtual = OMAP1510_DSP_BASE,
54 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
55 .length = OMAP1510_DSP_SIZE,
56 .type = MT_DEVICE
57 }, {
58 .virtual = OMAP1510_DSPREG_BASE,
59 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
60 .length = OMAP1510_DSPREG_SIZE,
61 .type = MT_DEVICE
62 }
63 };
64 #endif
65
66 #if defined(CONFIG_ARCH_OMAP16XX)
67 static struct map_desc omap16xx_io_desc[] __initdata = {
68 {
69 .virtual = OMAP16XX_DSP_BASE,
70 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
71 .length = OMAP16XX_DSP_SIZE,
72 .type = MT_DEVICE
73 }, {
74 .virtual = OMAP16XX_DSPREG_BASE,
75 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
76 .length = OMAP16XX_DSPREG_SIZE,
77 .type = MT_DEVICE
78 }
79 };
80 #endif
81
82 /*
83 * Maps common IO regions for omap1
84 */
omap1_map_common_io(void)85 static void __init omap1_map_common_io(void)
86 {
87 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
88 }
89
90 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
omap7xx_map_io(void)91 void __init omap7xx_map_io(void)
92 {
93 omap1_map_common_io();
94 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
95 }
96 #endif
97
98 #ifdef CONFIG_ARCH_OMAP15XX
omap15xx_map_io(void)99 void __init omap15xx_map_io(void)
100 {
101 omap1_map_common_io();
102 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
103 }
104 #endif
105
106 #if defined(CONFIG_ARCH_OMAP16XX)
omap16xx_map_io(void)107 void __init omap16xx_map_io(void)
108 {
109 omap1_map_common_io();
110 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
111 }
112 #endif
113
114 /*
115 * Common low-level hardware init for omap1.
116 */
omap1_init_early(void)117 void __init omap1_init_early(void)
118 {
119 omap_check_revision();
120
121 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
122 * on a Posted Write in the TIPB Bridge".
123 */
124 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
125 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
126 }
127
omap1_init_late(void)128 void __init omap1_init_late(void)
129 {
130 omap_serial_wakeup_init();
131 }
132
133 /*
134 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
135 */
136
omap_readb(u32 pa)137 u8 omap_readb(u32 pa)
138 {
139 return __raw_readb(OMAP1_IO_ADDRESS(pa));
140 }
141 EXPORT_SYMBOL(omap_readb);
142
omap_readw(u32 pa)143 u16 omap_readw(u32 pa)
144 {
145 return __raw_readw(OMAP1_IO_ADDRESS(pa));
146 }
147 EXPORT_SYMBOL(omap_readw);
148
omap_readl(u32 pa)149 u32 omap_readl(u32 pa)
150 {
151 return __raw_readl(OMAP1_IO_ADDRESS(pa));
152 }
153 EXPORT_SYMBOL(omap_readl);
154
omap_writeb(u8 v,u32 pa)155 void omap_writeb(u8 v, u32 pa)
156 {
157 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
158 }
159 EXPORT_SYMBOL(omap_writeb);
160
omap_writew(u16 v,u32 pa)161 void omap_writew(u16 v, u32 pa)
162 {
163 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
164 }
165 EXPORT_SYMBOL(omap_writew);
166
omap_writel(u32 v,u32 pa)167 void omap_writel(u32 v, u32 pa)
168 {
169 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
170 }
171 EXPORT_SYMBOL(omap_writel);
172
