1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board |
4 | * |
5 | * Copyright (C) 2004 Sean Young <sean@mess.org> |
6 | * |
7 | * Note: |
8 | * - In order for detection to work, jumper 3 must be set. |
9 | * - Drive A and B use the resident flash disk (RFD) flash translation layer. |
10 | * - If you have created your own jffs file system and the bios overwrites |
11 | * it during boot, try disabling Drive A: and B: in the boot order. |
12 | */ |
13 | |
14 | #include <linux/init.h> |
15 | #include <linux/module.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/mtd/map.h> |
18 | #include <linux/mtd/mtd.h> |
19 | #include <linux/mtd/partitions.h> |
20 | #include <linux/types.h> |
21 | |
22 | |
23 | #define WINDOW_ADDR 0x09400000 |
24 | #define WINDOW_SIZE 0x00200000 |
25 | |
26 | static struct map_info ts5500_map = { |
27 | .name = "TS-5500 Flash" , |
28 | .size = WINDOW_SIZE, |
29 | .bankwidth = 1, |
30 | .phys = WINDOW_ADDR |
31 | }; |
32 | |
33 | static const struct mtd_partition ts5500_partitions[] = { |
34 | { |
35 | .name = "Drive A" , |
36 | .offset = 0, |
37 | .size = 0x0e0000 |
38 | }, |
39 | { |
40 | .name = "BIOS" , |
41 | .offset = 0x0e0000, |
42 | .size = 0x020000, |
43 | }, |
44 | { |
45 | .name = "Drive B" , |
46 | .offset = 0x100000, |
47 | .size = 0x100000 |
48 | } |
49 | }; |
50 | |
51 | #define NUM_PARTITIONS ARRAY_SIZE(ts5500_partitions) |
52 | |
53 | static struct mtd_info *mymtd; |
54 | |
55 | static int __init init_ts5500_map(void) |
56 | { |
57 | int rc = 0; |
58 | |
59 | ts5500_map.virt = ioremap(offset: ts5500_map.phys, size: ts5500_map.size); |
60 | |
61 | if (!ts5500_map.virt) { |
62 | printk(KERN_ERR "Failed to ioremap\n" ); |
63 | rc = -EIO; |
64 | goto err2; |
65 | } |
66 | |
67 | simple_map_init(&ts5500_map); |
68 | |
69 | mymtd = do_map_probe(name: "jedec_probe" , map: &ts5500_map); |
70 | if (!mymtd) |
71 | mymtd = do_map_probe(name: "map_rom" , map: &ts5500_map); |
72 | |
73 | if (!mymtd) { |
74 | rc = -ENXIO; |
75 | goto err1; |
76 | } |
77 | |
78 | mymtd->owner = THIS_MODULE; |
79 | mtd_device_register(mymtd, ts5500_partitions, NUM_PARTITIONS); |
80 | |
81 | return 0; |
82 | |
83 | err1: |
84 | iounmap(addr: ts5500_map.virt); |
85 | err2: |
86 | return rc; |
87 | } |
88 | |
89 | static void __exit cleanup_ts5500_map(void) |
90 | { |
91 | if (mymtd) { |
92 | mtd_device_unregister(master: mymtd); |
93 | map_destroy(mtd: mymtd); |
94 | } |
95 | |
96 | if (ts5500_map.virt) { |
97 | iounmap(addr: ts5500_map.virt); |
98 | ts5500_map.virt = NULL; |
99 | } |
100 | } |
101 | |
102 | module_init(init_ts5500_map); |
103 | module_exit(cleanup_ts5500_map); |
104 | |
105 | MODULE_LICENSE("GPL" ); |
106 | MODULE_AUTHOR("Sean Young <sean@mess.org>" ); |
107 | MODULE_DESCRIPTION("MTD map driver for Technology Systems TS-5500 board" ); |
108 | |
109 | |