]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
69f34c98 | 2 | * $Id: lubbock-flash.c,v 1.21 2005/11/07 11:14:27 gleixner Exp $ |
1da177e4 LT |
3 | * |
4 | * Map driver for the Lubbock developer platform. | |
5 | * | |
6 | * Author: Nicolas Pitre | |
7 | * Copyright: (C) 2001 MontaVista Software Inc. | |
69f34c98 | 8 | * |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
4e57b681 TS |
18 | #include <linux/slab.h> |
19 | ||
1da177e4 LT |
20 | #include <linux/dma-mapping.h> |
21 | #include <linux/mtd/mtd.h> | |
22 | #include <linux/mtd/map.h> | |
23 | #include <linux/mtd/partitions.h> | |
4e57b681 | 24 | |
1da177e4 LT |
25 | #include <asm/io.h> |
26 | #include <asm/hardware.h> | |
27 | #include <asm/arch/pxa-regs.h> | |
28 | #include <asm/arch/lubbock.h> | |
29 | ||
30 | ||
31 | #define ROM_ADDR 0x00000000 | |
32 | #define FLASH_ADDR 0x04000000 | |
33 | ||
34 | #define WINDOW_SIZE 64*1024*1024 | |
35 | ||
36 | static void lubbock_map_inval_cache(struct map_info *map, unsigned long from, ssize_t len) | |
37 | { | |
38 | consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE); | |
39 | } | |
40 | ||
41 | static struct map_info lubbock_maps[2] = { { | |
42 | .size = WINDOW_SIZE, | |
43 | .phys = 0x00000000, | |
44 | .inval_cache = lubbock_map_inval_cache, | |
45 | }, { | |
46 | .size = WINDOW_SIZE, | |
47 | .phys = 0x04000000, | |
48 | .inval_cache = lubbock_map_inval_cache, | |
49 | } }; | |
50 | ||
51 | static struct mtd_partition lubbock_partitions[] = { | |
52 | { | |
53 | .name = "Bootloader", | |
54 | .size = 0x00040000, | |
55 | .offset = 0, | |
56 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
57 | },{ | |
58 | .name = "Kernel", | |
59 | .size = 0x00100000, | |
60 | .offset = 0x00040000, | |
61 | },{ | |
62 | .name = "Filesystem", | |
63 | .size = MTDPART_SIZ_FULL, | |
64 | .offset = 0x00140000 | |
65 | } | |
66 | }; | |
67 | ||
68 | static struct mtd_info *mymtds[2]; | |
69 | static struct mtd_partition *parsed_parts[2]; | |
70 | static int nr_parsed_parts[2]; | |
71 | ||
72 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
73 | ||
74 | static int __init init_lubbock(void) | |
75 | { | |
76 | int flashboot = (LUB_CONF_SWITCHES & 1); | |
77 | int ret = 0, i; | |
78 | ||
69f34c98 | 79 | lubbock_maps[0].bankwidth = lubbock_maps[1].bankwidth = |
1da177e4 LT |
80 | (BOOT_DEF & 1) ? 2 : 4; |
81 | ||
82 | /* Compensate for the nROMBT switch which swaps the flash banks */ | |
83 | printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n", | |
84 | flashboot?"Flash":"ROM", flashboot); | |
85 | ||
86 | lubbock_maps[flashboot^1].name = "Lubbock Application Flash"; | |
87 | lubbock_maps[flashboot].name = "Lubbock Boot ROM"; | |
88 | ||
89 | for (i = 0; i < 2; i++) { | |
90 | lubbock_maps[i].virt = ioremap(lubbock_maps[i].phys, WINDOW_SIZE); | |
91 | if (!lubbock_maps[i].virt) { | |
92 | printk(KERN_WARNING "Failed to ioremap %s\n", lubbock_maps[i].name); | |
93 | if (!ret) | |
94 | ret = -ENOMEM; | |
95 | continue; | |
96 | } | |
97 | lubbock_maps[i].cached = ioremap_cached(lubbock_maps[i].phys, WINDOW_SIZE); | |
98 | if (!lubbock_maps[i].cached) | |
99 | printk(KERN_WARNING "Failed to ioremap cached %s\n", lubbock_maps[i].name); | |
100 | simple_map_init(&lubbock_maps[i]); | |
101 | ||
102 | printk(KERN_NOTICE "Probing %s at physical address 0x%08lx (%d-bit bankwidth)\n", | |
69f34c98 | 103 | lubbock_maps[i].name, lubbock_maps[i].phys, |
1da177e4 LT |
104 | lubbock_maps[i].bankwidth * 8); |
105 | ||
106 | mymtds[i] = do_map_probe("cfi_probe", &lubbock_maps[i]); | |
69f34c98 | 107 | |
1da177e4 LT |
108 | if (!mymtds[i]) { |
109 | iounmap((void *)lubbock_maps[i].virt); | |
110 | if (lubbock_maps[i].cached) | |
111 | iounmap(lubbock_maps[i].cached); | |
112 | if (!ret) | |
113 | ret = -EIO; | |
114 | continue; | |
115 | } | |
116 | mymtds[i]->owner = THIS_MODULE; | |
117 | ||
118 | ret = parse_mtd_partitions(mymtds[i], probes, | |
119 | &parsed_parts[i], 0); | |
120 | ||
121 | if (ret > 0) | |
122 | nr_parsed_parts[i] = ret; | |
123 | } | |
124 | ||
125 | if (!mymtds[0] && !mymtds[1]) | |
126 | return ret; | |
69f34c98 | 127 | |
1da177e4 LT |
128 | for (i = 0; i < 2; i++) { |
129 | if (!mymtds[i]) { | |
130 | printk(KERN_WARNING "%s is absent. Skipping\n", lubbock_maps[i].name); | |
131 | } else if (nr_parsed_parts[i]) { | |
132 | add_mtd_partitions(mymtds[i], parsed_parts[i], nr_parsed_parts[i]); | |
133 | } else if (!i) { | |
134 | printk("Using static partitions on %s\n", lubbock_maps[i].name); | |
135 | add_mtd_partitions(mymtds[i], lubbock_partitions, ARRAY_SIZE(lubbock_partitions)); | |
136 | } else { | |
137 | printk("Registering %s as whole device\n", lubbock_maps[i].name); | |
138 | add_mtd_device(mymtds[i]); | |
139 | } | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static void __exit cleanup_lubbock(void) | |
145 | { | |
146 | int i; | |
147 | for (i = 0; i < 2; i++) { | |
148 | if (!mymtds[i]) | |
149 | continue; | |
150 | ||
151 | if (nr_parsed_parts[i] || !i) | |
152 | del_mtd_partitions(mymtds[i]); | |
153 | else | |
69f34c98 | 154 | del_mtd_device(mymtds[i]); |
1da177e4 LT |
155 | |
156 | map_destroy(mymtds[i]); | |
157 | iounmap((void *)lubbock_maps[i].virt); | |
158 | if (lubbock_maps[i].cached) | |
159 | iounmap(lubbock_maps[i].cached); | |
160 | ||
161 | if (parsed_parts[i]) | |
162 | kfree(parsed_parts[i]); | |
163 | } | |
164 | } | |
165 | ||
166 | module_init(init_lubbock); | |
167 | module_exit(cleanup_lubbock); | |
168 | ||
169 | MODULE_LICENSE("GPL"); | |
170 | MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); | |
171 | MODULE_DESCRIPTION("MTD map driver for Intel Lubbock"); |