1 /*
2 * sharpsl-flash.c
3 *
4 * Copyright (C) 2001 Lineo Japan, Inc.
5 * Copyright (C) 2002 SHARP
6 *
7 * based on rpxlite.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp
8 * Handle mapping of the flash on the RPX Lite and CLLF boards
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 */
21
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/kernel.h>
25 #include <linux/mtd/mtd.h>
26 #include <linux/mtd/map.h>
27 #include <linux/mtd/partitions.h>
28 #include <asm/io.h>
29 #include <asm/mach-types.h>
30
31 #define WINDOW_ADDR 0x00000000
32 #define WINDOW_SIZE 0x00800000
33 #define BANK_WIDTH 2
34
35 static struct mtd_info *mymtd;
36
37 struct map_info sharpsl_map = {
38 .name = "sharpsl-flash",
39 .size = WINDOW_SIZE,
40 .bankwidth = BANK_WIDTH,
41 .phys = WINDOW_ADDR
42 };
43
44 static struct mtd_partition sharpsl_partitions[1] = {
45 {
46 name: "Boot PROM Filesystem",
47 }
48 };
49
init_sharpsl(void)50 static int __init init_sharpsl(void)
51 {
52 struct mtd_partition *parts;
53 int nb_parts = 0;
54 char *part_type = "static";
55
56 printk(KERN_NOTICE "Sharp SL series flash device: %x at %x\n",
57 WINDOW_SIZE, WINDOW_ADDR);
58 sharpsl_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
59 if (!sharpsl_map.virt) {
60 printk("Failed to ioremap\n");
61 return -EIO;
62 }
63
64 simple_map_init(&sharpsl_map);
65
66 mymtd = do_map_probe("map_rom", &sharpsl_map);
67 if (!mymtd) {
68 iounmap(sharpsl_map.virt);
69 return -ENXIO;
70 }
71
72 mymtd->owner = THIS_MODULE;
73
74 if (machine_is_corgi() || machine_is_shepherd() || machine_is_husky()
75 || machine_is_poodle()) {
76 sharpsl_partitions[0].size=0x006d0000;
77 sharpsl_partitions[0].offset=0x00120000;
78 } else if (machine_is_tosa()) {
79 sharpsl_partitions[0].size=0x006a0000;
80 sharpsl_partitions[0].offset=0x00160000;
81 } else if (machine_is_spitz() || machine_is_akita() || machine_is_borzoi()) {
82 sharpsl_partitions[0].size=0x006b0000;
83 sharpsl_partitions[0].offset=0x00140000;
84 } else {
85 map_destroy(mymtd);
86 iounmap(sharpsl_map.virt);
87 return -ENODEV;
88 }
89
90 parts = sharpsl_partitions;
91 nb_parts = ARRAY_SIZE(sharpsl_partitions);
92
93 printk(KERN_NOTICE "Using %s partition definition\n", part_type);
94 add_mtd_partitions(mymtd, parts, nb_parts);
95
96 return 0;
97 }
98
cleanup_sharpsl(void)99 static void __exit cleanup_sharpsl(void)
100 {
101 if (mymtd) {
102 del_mtd_partitions(mymtd);
103 map_destroy(mymtd);
104 }
105 if (sharpsl_map.virt) {
106 iounmap(sharpsl_map.virt);
107 sharpsl_map.virt = 0;
108 }
109 }
110
111 module_init(init_sharpsl);
112 module_exit(cleanup_sharpsl);
113
114 MODULE_LICENSE("GPL");
115 MODULE_AUTHOR("SHARP (Original: Arnold Christensen <AKC@pel.dk>)");
116 MODULE_DESCRIPTION("MTD map driver for SHARP SL series");
117