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 omap1_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 .virtual = OMAP1_DSP_BASE,
33 .pfn = __phys_to_pfn(OMAP1_DSP_START),
34 .length = OMAP1_DSP_SIZE,
35 .type = MT_DEVICE
36 }, {
37 .virtual = OMAP1_DSPREG_BASE,
38 .pfn = __phys_to_pfn(OMAP1_DSPREG_START),
39 .length = OMAP1_DSPREG_SIZE,
40 .type = MT_DEVICE
41 }
42 };
43
44 /*
45 * Maps common IO regions for omap1
46 */
47 void __init omap1_map_io(void)
48 {
49 iotable_init(omap1_io_desc, ARRAY_SIZE(omap1_io_desc));
50 }
51
52 /*
53 * Common low-level hardware init for omap1.
54 */
55 void __init omap1_init_early(void)
56 {
57 omap_check_revision();
58
59 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
60 * on a Posted Write in the TIPB Bridge".
61 */
62 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
63 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
64 }
65
66 void __init omap1_init_late(void)
67 {
68 omap_serial_wakeup_init();
69 }
70
71 /*
72 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
73 */
74
75 u8 omap_readb(u32 pa)
76 {
77 return __raw_readb(OMAP1_IO_ADDRESS(pa));
78 }
79 EXPORT_SYMBOL(omap_readb);
80
81 u16 omap_readw(u32 pa)
82 {
83 return __raw_readw(OMAP1_IO_ADDRESS(pa));
84 }
85 EXPORT_SYMBOL(omap_readw);
86
87 u32 omap_readl(u32 pa)
88 {
89 return __raw_readl(OMAP1_IO_ADDRESS(pa));
90 }
91 EXPORT_SYMBOL(omap_readl);
92
93 void omap_writeb(u8 v, u32 pa)
94 {
95 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
96 }
97 EXPORT_SYMBOL(omap_writeb);
98
99 void omap_writew(u16 v, u32 pa)
100 {
101 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
102 }
103 EXPORT_SYMBOL(omap_writew);
104
105 void omap_writel(u32 v, u32 pa)
106 {
107 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
108 }
109 EXPORT_SYMBOL(omap_writel);
110
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