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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/*
* Drivers for the Total Impact PPC based computer "BRIQ"
* by Dr. Karsten Jeppesen
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/timer.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/prom.h>
#define BRIQ_PANEL_MINOR 156
#define BRIQ_PANEL_VFD_IOPORT 0x0390
#define BRIQ_PANEL_LED_IOPORT 0x0398
#define BRIQ_PANEL_VER "1.1 (04/20/2002)"
#define BRIQ_PANEL_MSG0 "Loading Linux"
static int vfd_is_open;
static unsigned char vfd[40];
static int vfd_cursor;
static unsigned char ledpb, led;
static void update_vfd(void)
{
int i;
/* cursor home */
outb(0x02, BRIQ_PANEL_VFD_IOPORT);
for (i=0; i<20; i++)
outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
/* cursor to next line */
outb(0xc0, BRIQ_PANEL_VFD_IOPORT);
for (i=20; i<40; i++)
outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
}
static void set_led(char state)
{
if (state == 'R')
led = 0x01;
else if (state == 'G')
led = 0x02;
else if (state == 'Y')
led = 0x03;
else if (state == 'X')
led = 0x00;
outb(led, BRIQ_PANEL_LED_IOPORT);
}
static int briq_panel_open(struct inode *ino, struct file *filep)
{
/* enforce single access */
if (vfd_is_open)
return -EBUSY;
vfd_is_open = 1;
return 0;
}
static int briq_panel_release(struct inode *ino, struct file *filep)
{
if (!vfd_is_open)
return -ENODEV;
vfd_is_open = 0;
return 0;
}
static ssize_t briq_panel_read(struct file *file, char *buf, size_t count,
loff_t *ppos)
{
unsigned short c;
unsigned char cp;
#if 0 /* Can't seek (pread) on this device */
if (ppos != &file->f_pos)
return -ESPIPE;
#endif
if (!vfd_is_open)
return -ENODEV;
c = (inb(BRIQ_PANEL_LED_IOPORT) & 0x000c) | (ledpb & 0x0003);
set_led(' ');
/* upper button released */
if ((!(ledpb & 0x0004)) && (c & 0x0004)) {
cp = ' ';
ledpb = c;
if (copy_to_user(buf, &cp, 1))
return -EFAULT;
return 1;
}
/* lower button released */
else if ((!(ledpb & 0x0008)) && (c & 0x0008)) {
cp = '\r';
ledpb = c;
if (copy_to_user(buf, &cp, 1))
return -EFAULT;
return 1;
} else {
ledpb = c;
return 0;
}
}
static void scroll_vfd( void )
{
int i;
for (i=0; i<20; i++) {
vfd[i] = vfd[i+20];
vfd[i+20] = ' ';
}
vfd_cursor = 20;
}
static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len,
loff_t *ppos)
{
size_t indx = len;
int i, esc = 0;
#if 0 /* Can't seek (pwrite) on this device */
if (ppos != &file->f_pos)
return -ESPIPE;
#endif
if (!vfd_is_open)
return -EBUSY;
for (;;) {
if (!indx)
break;
if (esc) {
set_led(*buf);
esc = 0;
} else if (*buf == 27) {
esc = 1;
} else if (*buf == 12) {
/* do a form feed */
for (i=0; i<40; i++)
vfd[i] = ' ';
vfd_cursor = 0;
} else if (*buf == 10) {
if (vfd_cursor < 20)
vfd_cursor = 20;
else if (vfd_cursor < 40)
vfd_cursor = 40;
else if (vfd_cursor < 60)
vfd_cursor = 60;
if (vfd_cursor > 59)
scroll_vfd();
} else {
/* just a character */
if (vfd_cursor > 39)
scroll_vfd();
vfd[vfd_cursor++] = *buf;
}
indx--;
buf++;
}
update_vfd();
return len;
}
static struct file_operations briq_panel_fops = {
.owner = THIS_MODULE,
.read = briq_panel_read,
.write = briq_panel_write,
.open = briq_panel_open,
.release = briq_panel_release,
};
static struct miscdevice briq_panel_miscdev = {
BRIQ_PANEL_MINOR,
"briq_panel",
&briq_panel_fops
};
static int __init briq_panel_init(void)
{
struct device_node *root = find_path_device("/");
char *machine;
int i;
machine = get_property(root, "model", NULL);
if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0)
return -ENODEV;
printk(KERN_INFO
"briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
BRIQ_PANEL_VER);
if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel"))
return -EBUSY;
if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) {
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
return -EBUSY;
}
ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c;
if (misc_register(&briq_panel_miscdev) < 0) {
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
release_region(BRIQ_PANEL_LED_IOPORT, 2);
return -EBUSY;
}
outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */
outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */
outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */
outb(0x06, BRIQ_PANEL_VFD_IOPORT); /* Entry normal */
for (i=0; i<40; i++)
vfd[i]=' ';
#ifndef MODULE
vfd[0] = 'L';
vfd[1] = 'o';
vfd[2] = 'a';
vfd[3] = 'd';
vfd[4] = 'i';
vfd[5] = 'n';
vfd[6] = 'g';
vfd[7] = ' ';
vfd[8] = '.';
vfd[9] = '.';
vfd[10] = '.';
#endif /* !MODULE */
update_vfd();
return 0;
}
static void __exit briq_panel_exit(void)
{
misc_deregister(&briq_panel_miscdev);
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
release_region(BRIQ_PANEL_LED_IOPORT, 2);
}
module_init(briq_panel_init);
module_exit(briq_panel_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>");
MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel");
|
