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(v: 0x0, MPU_PUBLIC_TIPB_CNTL); |
63 | omap_writew(v: 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(val: v, OMAP1_IO_ADDRESS(pa)); |
96 | } |
97 | EXPORT_SYMBOL(omap_writeb); |
98 | |
99 | void omap_writew(u16 v, u32 pa) |
100 | { |
101 | __raw_writew(val: v, OMAP1_IO_ADDRESS(pa)); |
102 | } |
103 | EXPORT_SYMBOL(omap_writew); |
104 | |
105 | void omap_writel(u32 v, u32 pa) |
106 | { |
107 | __raw_writel(val: v, OMAP1_IO_ADDRESS(pa)); |
108 | } |
109 | EXPORT_SYMBOL(omap_writel); |
110 | |