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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/mtd/maps/epxa10db-flash.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/mtd/maps/epxa10db-flash.c')
-rw-r--r--drivers/mtd/maps/epxa10db-flash.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/drivers/mtd/maps/epxa10db-flash.c b/drivers/mtd/maps/epxa10db-flash.c
new file mode 100644
index 000000000000..ab6dbe2b8cce
--- /dev/null
+++ b/drivers/mtd/maps/epxa10db-flash.c
@@ -0,0 +1,176 @@
1/*
2 * Flash memory access on EPXA based devices
3 *
4 * (C) 2000 Nicolas Pitre <nico@cam.org>
5 * Copyright (C) 2001 Altera Corporation
6 * Copyright (C) 2001 Red Hat, Inc.
7 *
8 * $Id: epxa10db-flash.c,v 1.13 2004/11/04 13:24:14 gleixner Exp $
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25#include <linux/config.h>
26#include <linux/module.h>
27#include <linux/types.h>
28#include <linux/kernel.h>
29#include <linux/init.h>
30#include <asm/io.h>
31#include <linux/mtd/mtd.h>
32#include <linux/mtd/map.h>
33#include <linux/mtd/partitions.h>
34
35#include <asm/hardware.h>
36#ifdef CONFIG_EPXA10DB
37#define BOARD_NAME "EPXA10DB"
38#else
39#define BOARD_NAME "EPXA1DB"
40#endif
41
42static int nr_parts = 0;
43static struct mtd_partition *parts;
44
45static struct mtd_info *mymtd;
46
47static int epxa_default_partitions(struct mtd_info *master, struct mtd_partition **pparts);
48
49
50static struct map_info epxa_map = {
51 .name = "EPXA flash",
52 .size = FLASH_SIZE,
53 .bankwidth = 2,
54 .phys = FLASH_START,
55};
56
57static const char *probes[] = { "RedBoot", "afs", NULL };
58
59static int __init epxa_mtd_init(void)
60{
61 int i;
62
63 printk(KERN_NOTICE "%s flash device: 0x%x at 0x%x\n", BOARD_NAME, FLASH_SIZE, FLASH_START);
64
65 epxa_map.virt = ioremap(FLASH_START, FLASH_SIZE);
66 if (!epxa_map.virt) {
67 printk("Failed to ioremap %s flash\n",BOARD_NAME);
68 return -EIO;
69 }
70 simple_map_init(&epxa_map);
71
72 mymtd = do_map_probe("cfi_probe", &epxa_map);
73 if (!mymtd) {
74 iounmap((void *)epxa_map.virt);
75 return -ENXIO;
76 }
77
78 mymtd->owner = THIS_MODULE;
79
80 /* Unlock the flash device. */
81 if(mymtd->unlock){
82 for (i=0; i<mymtd->numeraseregions;i++){
83 int j;
84 for(j=0;j<mymtd->eraseregions[i].numblocks;j++){
85 mymtd->unlock(mymtd,mymtd->eraseregions[i].offset + j * mymtd->eraseregions[i].erasesize,mymtd->eraseregions[i].erasesize);
86 }
87 }
88 }
89
90#ifdef CONFIG_MTD_PARTITIONS
91 nr_parts = parse_mtd_partitions(mymtd, probes, &parts, 0);
92
93 if (nr_parts > 0) {
94 add_mtd_partitions(mymtd, parts, nr_parts);
95 return 0;
96 }
97#endif
98 /* No recognised partitioning schemes found - use defaults */
99 nr_parts = epxa_default_partitions(mymtd, &parts);
100 if (nr_parts > 0) {
101 add_mtd_partitions(mymtd, parts, nr_parts);
102 return 0;
103 }
104
105 /* If all else fails... */
106 add_mtd_device(mymtd);
107 return 0;
108}
109
110static void __exit epxa_mtd_cleanup(void)
111{
112 if (mymtd) {
113 if (nr_parts)
114 del_mtd_partitions(mymtd);
115 else
116 del_mtd_device(mymtd);
117 map_destroy(mymtd);
118 }
119 if (epxa_map.virt) {
120 iounmap((void *)epxa_map.virt);
121 epxa_map.virt = 0;
122 }
123}
124
125
126/*
127 * This will do for now, once we decide which bootldr we're finally
128 * going to use then we'll remove this function and do it properly
129 *
130 * Partions are currently (as offsets from base of flash):
131 * 0x00000000 - 0x003FFFFF - bootloader (!)
132 * 0x00400000 - 0x00FFFFFF - Flashdisk
133 */
134
135static int __init epxa_default_partitions(struct mtd_info *master, struct mtd_partition **pparts)
136{
137 struct mtd_partition *parts;
138 int ret, i;
139 int npartitions = 0;
140 char *names;
141 const char *name = "jffs";
142
143 printk("Using default partitions for %s\n",BOARD_NAME);
144 npartitions=1;
145 parts = kmalloc(npartitions*sizeof(*parts)+strlen(name), GFP_KERNEL);
146 memzero(parts,npartitions*sizeof(*parts)+strlen(name));
147 if (!parts) {
148 ret = -ENOMEM;
149 goto out;
150 }
151 i=0;
152 names = (char *)&parts[npartitions];
153 parts[i].name = names;
154 names += strlen(name) + 1;
155 strcpy(parts[i].name, name);
156
157#ifdef CONFIG_EPXA10DB
158 parts[i].size = FLASH_SIZE-0x00400000;
159 parts[i].offset = 0x00400000;
160#else
161 parts[i].size = FLASH_SIZE-0x00180000;
162 parts[i].offset = 0x00180000;
163#endif
164
165 out:
166 *pparts = parts;
167 return npartitions;
168}
169
170
171module_init(epxa_mtd_init);
172module_exit(epxa_mtd_cleanup);
173
174MODULE_AUTHOR("Clive Davies");
175MODULE_DESCRIPTION("Altera epxa mtd flash map");
176MODULE_LICENSE("GPL");