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
13 #include <asm/tlb.h>
14 #include <asm/mach/map.h>
15
16 #include <mach/mux.h>
17 #include <mach/tc.h>
18 #include <linux/omap-dma.h>
19
20 #include "iomap.h"
21 #include "common.h"
22 #include "clock.h"
23
24 /*
25 * The machine specific code may provide the extra mapping besides the
26 * default mapping provided here.
27 */
28 static struct map_desc omap_io_desc[] __initdata = {
29 {
30 .virtual = OMAP1_IO_VIRT,
31 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
32 .length = OMAP1_IO_SIZE,
33 .type = MT_DEVICE
34 }
35 };
36
37 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
38 static struct map_desc omap7xx_io_desc[] __initdata = {
39 {
40 .virtual = OMAP7XX_DSP_BASE,
41 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
42 .length = OMAP7XX_DSP_SIZE,
43 .type = MT_DEVICE
44 }, {
45 .virtual = OMAP7XX_DSPREG_BASE,
46 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
47 .length = OMAP7XX_DSPREG_SIZE,
48 .type = MT_DEVICE
49 }
50 };
51 #endif
52
53 #ifdef CONFIG_ARCH_OMAP15XX
54 static struct map_desc omap1510_io_desc[] __initdata = {
55 {
56 .virtual = OMAP1510_DSP_BASE,
57 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
58 .length = OMAP1510_DSP_SIZE,
59 .type = MT_DEVICE
60 }, {
61 .virtual = OMAP1510_DSPREG_BASE,
62 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
63 .length = OMAP1510_DSPREG_SIZE,
64 .type = MT_DEVICE
65 }
66 };
67 #endif
68
69 #if defined(CONFIG_ARCH_OMAP16XX)
70 static struct map_desc omap16xx_io_desc[] __initdata = {
71 {
72 .virtual = OMAP16XX_DSP_BASE,
73 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
74 .length = OMAP16XX_DSP_SIZE,
75 .type = MT_DEVICE
76 }, {
77 .virtual = OMAP16XX_DSPREG_BASE,
78 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
79 .length = OMAP16XX_DSPREG_SIZE,
80 .type = MT_DEVICE
81 }
82 };
83 #endif
84
85 /*
86 * Maps common IO regions for omap1
87 */
omap1_map_common_io(void)88 static void __init omap1_map_common_io(void)
89 {
90 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
91 }
92
93 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
omap7xx_map_io(void)94 void __init omap7xx_map_io(void)
95 {
96 omap1_map_common_io();
97 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
98 }
99 #endif
100
101 #ifdef CONFIG_ARCH_OMAP15XX
omap15xx_map_io(void)102 void __init omap15xx_map_io(void)
103 {
104 omap1_map_common_io();
105 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
106 }
107 #endif
108
109 #if defined(CONFIG_ARCH_OMAP16XX)
omap16xx_map_io(void)110 void __init omap16xx_map_io(void)
111 {
112 omap1_map_common_io();
113 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
114 }
115 #endif
116
117 /*
118 * Common low-level hardware init for omap1.
119 */
omap1_init_early(void)120 void __init omap1_init_early(void)
121 {
122 omap_check_revision();
123
124 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
125 * on a Posted Write in the TIPB Bridge".
126 */
127 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
128 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
129
130 /* Must init clocks early to assure that timer interrupt works
131 */
132 omap1_clk_init();
133 omap1_mux_init();
134 }
135
omap1_init_late(void)136 void __init omap1_init_late(void)
137 {
138 omap_serial_wakeup_init();
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