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c5f80065 EG |
1 | /* |
2 | * arch/arm/mach-tegra/io.c | |
3 | * | |
4 | * Copyright (C) 2010 Google, Inc. | |
5 | * | |
6 | * Author: | |
7 | * Colin Cross <ccross@google.com> | |
8 | * Erik Gilling <konkers@google.com> | |
9 | * | |
10 | * This software is licensed under the terms of the GNU General Public | |
11 | * License version 2, as published by the Free Software Foundation, and | |
12 | * may be copied, distributed, and modified under those terms. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/io.h> | |
26 | ||
27 | #include <mach/hardware.h> | |
28 | #include <asm/page.h> | |
29 | #include <asm/mach/map.h> | |
30 | ||
31 | #include "board.h" | |
32 | ||
33 | static struct map_desc tegra_io_desc[] __initdata = { | |
34 | { | |
35 | .virtual = IO_PPSB_VIRT, | |
36 | .pfn = __phys_to_pfn(IO_PPSB_PHYS), | |
37 | .length = IO_PPSB_SIZE, | |
38 | .type = MT_DEVICE, | |
39 | }, | |
40 | { | |
41 | .virtual = IO_APB_VIRT, | |
42 | .pfn = __phys_to_pfn(IO_APB_PHYS), | |
43 | .length = IO_APB_SIZE, | |
44 | .type = MT_DEVICE, | |
45 | }, | |
46 | { | |
47 | .virtual = IO_CPU_VIRT, | |
48 | .pfn = __phys_to_pfn(IO_CPU_PHYS), | |
49 | .length = IO_CPU_SIZE, | |
50 | .type = MT_DEVICE, | |
51 | }, | |
52 | }; | |
53 | ||
54 | void __init tegra_map_common_io(void) | |
55 | { | |
56 | iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc)); | |
57 | } | |
58 | ||
59 | /* | |
60 | * Intercept ioremap() requests for addresses in our fixed mapping regions. | |
61 | */ | |
62 | void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type) | |
63 | { | |
64 | void __iomem *v = IO_ADDRESS(p); | |
65 | if (v == NULL) | |
66 | v = __arm_ioremap(p, size, type); | |
67 | return v; | |
68 | } | |
69 | EXPORT_SYMBOL(tegra_ioremap); | |
70 | ||
71 | void tegra_iounmap(volatile void __iomem *addr) | |
72 | { | |
73 | unsigned long virt = (unsigned long)addr; | |
74 | ||
75 | if (virt >= VMALLOC_START && virt < VMALLOC_END) | |
76 | __iounmap(addr); | |
77 | } | |
78 | EXPORT_SYMBOL(tegra_iounmap); |