1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* OpenBIOS - free your system!
* ( firmware/flash device driver for Linux )
*
* bios_core.c - core skeleton
*
* This program is part of a free implementation of the IEEE 1275-1994
* Standard for Boot (Initialization Configuration) Firmware.
*
* Copyright (C) 1998-2004 Stefan Reinauer, <stepan@openbios.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*
*/
#include <linux/config.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
#ifdef MODULE
#ifdef MODVERSIONS
#include <linux/modversions.h>
#endif
#endif
#include <linux/module.h>
#endif
#include <linux/pci.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <asm/io.h>
#include "bios.h"
#include "pcisets.h"
#include "flashchips.h"
#include "programming.h"
extern struct file_operations bios_fops;
int bios_proc_register(void);
int bios_proc_unregister(void);
int write = 0;
spinlock_t bios_lock = SPIN_LOCK_UNLOCKED;
/*
* ******************************************
*
* Cleanup
*
* ******************************************
*/
static void free_iomaps(void)
{
unsigned long lastmapped=0;
unsigned int i;
/* We remember the last mapped area to be sure that we only iounmap
* every mapped area once. If two flash devices are in the same
* area but do not occur sequentially during probing you have a
* seriously strange hardware
*/
for (i=0; i<flashcount; i++) {
if (lastmapped==flashdevices[i].mapped)
continue;
iounmap((void *)flashdevices[i].mapped);
lastmapped=flashdevices[i].mapped;
}
}
/*
* ******************************************
*
* Initialization
*
* ******************************************
*/
void probe_system(void)
{
#ifdef __alpha__
probe_alphafw();
#endif
/* This function checks all flash media attached to
* PCI devices in the system. This means NON-PCI systems
* don't work. This causes machine checks on my LX164 test
* machine, so leave it away until it's fixed. This is
* needed for Ruffians, so we check the machine type
* in probe_alphafw() and call probe_pcibus from there.
* This could use some cleanup
*/
#ifndef __alpha__
probe_pcibus();
#endif
}
static __init int bios_init(void)
{
printk(KERN_INFO "BIOS driver v" BIOS_VERSION " (writing %s) for "
UTS_RELEASE "\n", write?"enabled":"disabled");
#if !defined(UTC_BIOS) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
if (!pci_present()) {
printk(KERN_WARNING "BIOS: No PCI system.");
return -EBUSY;
}
#endif
/* Probe for flash devices */
probe_system();
if (flashcount==0) {
printk(KERN_WARNING "BIOS: No flash devices found.\n");
return -EBUSY;
}
if (register_chrdev(BIOS_MAJOR, "bios", &bios_fops) == -EBUSY) {
printk(KERN_WARNING "BIOS: Could not register bios device.\n");
free_iomaps();
return -EBUSY;
}
#ifdef CONFIG_PROC_FS
bios_proc_register();
#endif
return 0;
}
/*
* ******************************************
*
* module handling
*
* ******************************************
*/
#ifdef MODULE
MODULE_PARM(write,"i");
MODULE_AUTHOR("Stefan Reinauer <stepan@openbios.org>");
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,10)
MODULE_LICENSE("GPL");
#endif
static __exit void cleanup_bios_module (void)
{
#ifdef CONFIG_PROC_FS
bios_proc_unregister();
#endif
free_iomaps();
unregister_chrdev(BIOS_MAJOR, "bios");
printk(KERN_INFO "BIOS driver removed.\n");
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
int init_module(void)
{
return bios_init();
}
void cleanup_module(void)
{
cleanup_bios_module();
}
#endif
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,74)
module_init(bios_init);
module_exit(cleanup_bios_module);
#endif
void inc_mod(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
MOD_INC_USE_COUNT;
#endif
}
void dec_mod(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
MOD_DEC_USE_COUNT;
#endif
}
#endif
|
