projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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); |