1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2004 Sean Young <sean@mess.org>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Note:
8*4882a593Smuzhiyun * - In order for detection to work, jumper 3 must be set.
9*4882a593Smuzhiyun * - Drive A and B use the resident flash disk (RFD) flash translation layer.
10*4882a593Smuzhiyun * - If you have created your own jffs file system and the bios overwrites
11*4882a593Smuzhiyun * it during boot, try disabling Drive A: and B: in the boot order.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <linux/init.h>
15*4882a593Smuzhiyun #include <linux/module.h>
16*4882a593Smuzhiyun #include <linux/kernel.h>
17*4882a593Smuzhiyun #include <linux/mtd/map.h>
18*4882a593Smuzhiyun #include <linux/mtd/mtd.h>
19*4882a593Smuzhiyun #include <linux/mtd/partitions.h>
20*4882a593Smuzhiyun #include <linux/types.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #define WINDOW_ADDR 0x09400000
24*4882a593Smuzhiyun #define WINDOW_SIZE 0x00200000
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static struct map_info ts5500_map = {
27*4882a593Smuzhiyun .name = "TS-5500 Flash",
28*4882a593Smuzhiyun .size = WINDOW_SIZE,
29*4882a593Smuzhiyun .bankwidth = 1,
30*4882a593Smuzhiyun .phys = WINDOW_ADDR
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun static const struct mtd_partition ts5500_partitions[] = {
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun .name = "Drive A",
36*4882a593Smuzhiyun .offset = 0,
37*4882a593Smuzhiyun .size = 0x0e0000
38*4882a593Smuzhiyun },
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun .name = "BIOS",
41*4882a593Smuzhiyun .offset = 0x0e0000,
42*4882a593Smuzhiyun .size = 0x020000,
43*4882a593Smuzhiyun },
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun .name = "Drive B",
46*4882a593Smuzhiyun .offset = 0x100000,
47*4882a593Smuzhiyun .size = 0x100000
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun #define NUM_PARTITIONS ARRAY_SIZE(ts5500_partitions)
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static struct mtd_info *mymtd;
54*4882a593Smuzhiyun
init_ts5500_map(void)55*4882a593Smuzhiyun static int __init init_ts5500_map(void)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun int rc = 0;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ts5500_map.virt = ioremap(ts5500_map.phys, ts5500_map.size);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun if (!ts5500_map.virt) {
62*4882a593Smuzhiyun printk(KERN_ERR "Failed to ioremap\n");
63*4882a593Smuzhiyun rc = -EIO;
64*4882a593Smuzhiyun goto err2;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun simple_map_init(&ts5500_map);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun mymtd = do_map_probe("jedec_probe", &ts5500_map);
70*4882a593Smuzhiyun if (!mymtd)
71*4882a593Smuzhiyun mymtd = do_map_probe("map_rom", &ts5500_map);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun if (!mymtd) {
74*4882a593Smuzhiyun rc = -ENXIO;
75*4882a593Smuzhiyun goto err1;
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun mymtd->owner = THIS_MODULE;
79*4882a593Smuzhiyun mtd_device_register(mymtd, ts5500_partitions, NUM_PARTITIONS);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun return 0;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun err1:
84*4882a593Smuzhiyun iounmap(ts5500_map.virt);
85*4882a593Smuzhiyun err2:
86*4882a593Smuzhiyun return rc;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
cleanup_ts5500_map(void)89*4882a593Smuzhiyun static void __exit cleanup_ts5500_map(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun if (mymtd) {
92*4882a593Smuzhiyun mtd_device_unregister(mymtd);
93*4882a593Smuzhiyun map_destroy(mymtd);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun if (ts5500_map.virt) {
97*4882a593Smuzhiyun iounmap(ts5500_map.virt);
98*4882a593Smuzhiyun ts5500_map.virt = NULL;
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun module_init(init_ts5500_map);
103*4882a593Smuzhiyun module_exit(cleanup_ts5500_map);
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun MODULE_LICENSE("GPL");
106*4882a593Smuzhiyun MODULE_AUTHOR("Sean Young <sean@mess.org>");
107*4882a593Smuzhiyun MODULE_DESCRIPTION("MTD map driver for Technology Systems TS-5500 board");
108*4882a593Smuzhiyun
109