projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * Handle mapping of the NOR flash on implementa A7 boards |
| 3 | * | |
| 4 | * Copyright 2002 SYSGO Real-Time Solutions GmbH | |
| 69f34c98 | 5 | * |
| 1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/types.h> | |
| 13 | #include <linux/kernel.h> | |
| 14 | #include <linux/init.h> | |
| 15 | #include <asm/io.h> | |
| 16 | #include <linux/mtd/mtd.h> | |
| 17 | #include <linux/mtd/map.h> | |
| 1da177e4 | 18 | #include <linux/mtd/partitions.h> |
| 1da177e4 LT |
19 | |
| 20 | #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */ | |
| 21 | #define WINDOW_SIZE0 0x00800000 | |
| 22 | #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */ | |
| 23 | #define WINDOW_SIZE1 0x00800000 | |
| 24 | #define NUM_FLASHBANKS 2 | |
| 25 | #define BUSWIDTH 4 | |
| 26 | ||
| 27 | /* can be { "cfi_probe", "jedec_probe", "map_rom", NULL } */ | |
| 28 | #define PROBETYPES { "jedec_probe", NULL } | |
| 29 | ||
| 30 | #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */ | |
| 31 | #define MTDID "impa7-%d" /* for mtdparts= partitioning */ | |
| 32 | ||
| 33 | static struct mtd_info *impa7_mtd[NUM_FLASHBANKS]; | |
| 34 | ||
| 35 | ||
| 36 | static struct map_info impa7_map[NUM_FLASHBANKS] = { | |
| 37 | { | |
| 38 | .name = "impA7 NOR Flash Bank #0", | |
| 39 | .size = WINDOW_SIZE0, | |
| 40 | .bankwidth = BUSWIDTH, | |
| 41 | }, | |
| 42 | { | |
| 43 | .name = "impA7 NOR Flash Bank #1", | |
| 44 | .size = WINDOW_SIZE1, | |
| 45 | .bankwidth = BUSWIDTH, | |
| 46 | }, | |
| 47 | }; | |
| 48 | ||
| 1da177e4 | 49 | /* |
| 69f34c98 | 50 | * MTD partitioning stuff |
| 1da177e4 | 51 | */ |
| 5003403b | 52 | static struct mtd_partition partitions[] = |
| 1da177e4 LT |
53 | { |
| 54 | { | |
| 55 | .name = "FileSystem", | |
| 56 | .size = 0x800000, | |
| 57 | .offset = 0x00000000 | |
| 58 | }, | |
| 59 | }; | |
| 60 | ||
| 4f8f3af2 | 61 | static int __init init_impa7(void) |
| 1da177e4 LT |
62 | { |
| 63 | static const char *rom_probe_types[] = PROBETYPES; | |
| 64 | const char **type; | |
| 1da177e4 LT |
65 | int i; |
| 66 | static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = { | |
| 67 | { WINDOW_ADDR0, WINDOW_SIZE0 }, | |
| 68 | { WINDOW_ADDR1, WINDOW_SIZE1 }, | |
| 69 | }; | |
| 70 | int devicesfound = 0; | |
| 71 | ||
| 72 | for(i=0; i<NUM_FLASHBANKS; i++) | |
| 73 | { | |
| 74 | printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n", | |
| 75 | pt[i].size, pt[i].addr); | |
| 76 | ||
| 77 | impa7_map[i].phys = pt[i].addr; | |
| 78 | impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size); | |
| 79 | if (!impa7_map[i].virt) { | |
| 80 | printk(MSG_PREFIX "failed to ioremap\n"); | |
| 81 | return -EIO; | |
| 82 | } | |
| 83 | simple_map_init(&impa7_map[i]); | |
| 84 | ||
| 85 | impa7_mtd[i] = 0; | |
| 86 | type = rom_probe_types; | |
| 87 | for(; !impa7_mtd[i] && *type; type++) { | |
| 88 | impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]); | |
| 89 | } | |
| 90 | ||
| 91 | if (impa7_mtd[i]) { | |
| 92 | impa7_mtd[i]->owner = THIS_MODULE; | |
| 93 | devicesfound++; | |
| 42d7fbe2 | 94 | mtd_device_parse_register(impa7_mtd[i], NULL, NULL, |
| 5003403b DES |
95 | partitions, |
| 96 | ARRAY_SIZE(partitions)); | |
| 1da177e4 | 97 | } |
| 69f34c98 | 98 | else |
| 1da177e4 LT |
99 | iounmap((void *)impa7_map[i].virt); |
| 100 | } | |
| 101 | return devicesfound == 0 ? -ENXIO : 0; | |
| 102 | } | |
| 103 | ||
| 104 | static void __exit cleanup_impa7(void) | |
| 105 | { | |
| 106 | int i; | |
| 107 | for (i=0; i<NUM_FLASHBANKS; i++) { | |
| 108 | if (impa7_mtd[i]) { | |
| 96b639fd | 109 | mtd_device_unregister(impa7_mtd[i]); |
| 1da177e4 LT |
110 | map_destroy(impa7_mtd[i]); |
| 111 | iounmap((void *)impa7_map[i].virt); | |
| 112 | impa7_map[i].virt = 0; | |
| 113 | } | |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 117 | module_init(init_impa7); | |
| 118 | module_exit(cleanup_impa7); | |
| 119 | ||
| 120 | MODULE_LICENSE("GPL"); | |
| 121 | MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>"); | |
| 122 | MODULE_DESCRIPTION("MTD map driver for implementa impA7"); |