blob: 15bbda03be6542cd860759a79a914387c842301d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Handle mapping of the NOR flash on implementa A7 boards
3 *
4 * Copyright 2002 SYSGO Real-Time Solutions GmbH
Thomas Gleixner69f34c92005-11-07 11:15:40 +00005 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/mtd/partitions.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
28#define MTDID "impa7-%d" /* for mtdparts= partitioning */
29
30static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
31
Artem Bityutskiy0984c892013-03-12 10:46:37 +020032static const char * const rom_probe_types[] = { "jedec_probe", NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34static struct map_info impa7_map[NUM_FLASHBANKS] = {
35 {
36 .name = "impA7 NOR Flash Bank #0",
37 .size = WINDOW_SIZE0,
38 .bankwidth = BUSWIDTH,
39 },
40 {
41 .name = "impA7 NOR Flash Bank #1",
42 .size = WINDOW_SIZE1,
43 .bankwidth = BUSWIDTH,
44 },
45};
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047/*
Thomas Gleixner69f34c92005-11-07 11:15:40 +000048 * MTD partitioning stuff
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 */
Dmitry Eremin-Solenikov50034032011-06-02 17:59:44 +040050static struct mtd_partition partitions[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -070051{
52 {
53 .name = "FileSystem",
54 .size = 0x800000,
55 .offset = 0x00000000
56 },
57};
58
Dmitri Vorobiev4f8f3af2008-11-25 02:54:59 +020059static int __init init_impa7(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
Artem Bityutskiy0984c892013-03-12 10:46:37 +020061 const char * const *type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 int i;
63 static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
64 { WINDOW_ADDR0, WINDOW_SIZE0 },
65 { WINDOW_ADDR1, WINDOW_SIZE1 },
66 };
67 int devicesfound = 0;
68
69 for(i=0; i<NUM_FLASHBANKS; i++)
70 {
71 printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
72 pt[i].size, pt[i].addr);
73
74 impa7_map[i].phys = pt[i].addr;
75 impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
76 if (!impa7_map[i].virt) {
77 printk(MSG_PREFIX "failed to ioremap\n");
78 return -EIO;
79 }
80 simple_map_init(&impa7_map[i]);
81
Jingoo Hand1d90c992013-08-07 16:12:14 +090082 impa7_mtd[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 type = rom_probe_types;
84 for(; !impa7_mtd[i] && *type; type++) {
85 impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
86 }
87
88 if (impa7_mtd[i]) {
89 impa7_mtd[i]->owner = THIS_MODULE;
90 devicesfound++;
Artem Bityutskiy42d7fbe2012-03-09 19:24:26 +020091 mtd_device_parse_register(impa7_mtd[i], NULL, NULL,
Dmitry Eremin-Solenikov50034032011-06-02 17:59:44 +040092 partitions,
93 ARRAY_SIZE(partitions));
Jingoo Hand1d90c992013-08-07 16:12:14 +090094 } else {
95 iounmap((void __iomem *)impa7_map[i].virt);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 }
98 return devicesfound == 0 ? -ENXIO : 0;
99}
100
101static void __exit cleanup_impa7(void)
102{
103 int i;
104 for (i=0; i<NUM_FLASHBANKS; i++) {
105 if (impa7_mtd[i]) {
Jamie Iles96b639f2011-05-23 10:23:04 +0100106 mtd_device_unregister(impa7_mtd[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 map_destroy(impa7_mtd[i]);
Jingoo Hand1d90c992013-08-07 16:12:14 +0900108 iounmap((void __iomem *)impa7_map[i].virt);
109 impa7_map[i].virt = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 }
111 }
112}
113
114module_init(init_impa7);
115module_exit(cleanup_impa7);
116
117MODULE_LICENSE("GPL");
118MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
119MODULE_DESCRIPTION("MTD map driver for implementa impA7");