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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
/*
* Video spigot capture driver.
*
* Copyright (c) 1995, Jim Lowe. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This is the minimum driver code required to make a spigot work.
* Unfortunatly, I can't include a real driver since the information
* on the spigot is under non-disclosure. You can pick up a library
* that will work with this driver from ftp://ftp.cs.uwm.edu/pub/FreeBSD.
* The library contains the source that I can release as well as several
* object modules and functions that allows one to read spigot data.
* See the code for spigot_grab.c that is included with the library
* data.
*
* The vendor will not allow me to release the spigot library code.
* Please don't ask me for it.
*
* To use this driver you will need the spigot library. The library is
* available from:
*
* ftp.cs.uwm.edu://pub/FreeBSD/spigot/spigot.tar.gz
*
* Version 1.7, December 1995.
*
*/
#include "spigot.h"
#if NSPIGOT > 0
#if NSPIGOT > 1
error "Can only have 1 spigot configured."
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/mman.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /* DEVFS */
#include <machine/frame.h>
#include <machine/md_var.h>
#include <machine/spigot.h>
#include <machine/psl.h>
#include <i386/isa/isa_device.h>
static struct spigot_softc {
u_long flags;
u_long maddr;
struct proc *p;
u_long signal_num;
u_short irq;
#ifdef DEVFS
void *devfs_token;
#endif
} spigot_softc[NSPIGOT];
/* flags in softc */
#define OPEN 0x01
#define ALIVE 0x02
#define UNIT(dev) minor(dev)
static int spigot_probe(struct isa_device *id);
static int spigot_attach(struct isa_device *id);
struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"};
static d_open_t spigot_open;
static d_close_t spigot_close;
static d_read_t spigot_read;
static d_write_t spigot_write;
static d_ioctl_t spigot_ioctl;
static d_select_t spigot_select;
static d_mmap_t spigot_mmap;
#define CDEV_MAJOR 11
static struct cdevsw spigot_cdevsw =
{ spigot_open, spigot_close, spigot_read, spigot_write, /*11*/
spigot_ioctl, nostop, nullreset, nodevtotty,/* Spigot */
spigot_select, spigot_mmap, NULL, "spigot", NULL, -1 };
static int
spigot_probe(struct isa_device *devp)
{
int status;
struct spigot_softc *ss=(struct spigot_softc *)&spigot_softc[devp->id_unit];
ss->flags = 0;
ss->maddr = 0;
ss->irq = 0;
if(devp->id_iobase != 0xad6 || inb(0xad9) == 0xff)
status = 0; /* not found */
else {
status = 1; /* found */
ss->flags |= ALIVE;
}
return(status);
}
static int
spigot_attach(struct isa_device *devp)
{
int unit;
struct spigot_softc *ss= &spigot_softc[unit = devp->id_unit];
ss->maddr = kvtop(devp->id_maddr);
ss->irq = devp->id_irq;
#ifdef DEVFS
ss->devfs_token =
devfs_add_devswf(&spigot_cdevsw, unit, DV_CHR, 0, 0, 0644,
"spigot%d", unit);
#endif
return 1;
}
static int
spigot_open(dev_t dev, int flags, int fmt, struct proc *p)
{
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
if((ss->flags & ALIVE) == 0)
return ENXIO;
if(ss->flags & OPEN)
return EBUSY;
#if !defined(SPIGOT_UNSECURE)
/* Since we can't map the i/o page, don't allow open unless suser */
if(suser(p->p_ucred, &p->p_acflag) != 0)
return EPERM;
#endif
ss->flags |= OPEN;
ss->p = 0;
ss->signal_num = 0;
return 0;
}
static int
spigot_close(dev_t dev, int flags, int fmt, struct proc *p)
{
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
ss->flags &= ~OPEN;
ss->p = 0;
ss->signal_num = 0;
outb(0xad6, 0);
return 0;
}
static int
spigot_write(dev_t dev, struct uio *uio, int ioflag)
{
return ENXIO;
}
static int
spigot_read(dev_t dev, struct uio *uio, int ioflag)
{
return ENXIO;
}
static int
spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
int error;
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
struct trapframe *fp;
struct spigot_info *info;
if(!data) return(EINVAL);
switch(cmd){
case SPIGOT_SETINT:
ss->p = p;
ss->signal_num = *((int *)data);
break;
case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
#if !defined(SPIGOT_UNSECURE)
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return error;
#endif
fp=(struct trapframe *)p->p_md.md_regs;
fp->tf_eflags |= PSL_IOPL;
break;
case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */
fp=(struct trapframe *)p->p_md.md_regs;
fp->tf_eflags &= ~PSL_IOPL;
break;
case SPIGOT_GET_INFO:
info = (struct spigot_info *)data;
info->maddr = ss->maddr;
info->irq = ss->irq;
break;
default:
return ENOTTY;
}
return 0;
}
static int
spigot_select(dev_t dev, int rw, struct proc *p)
{
return ENXIO;
}
/*
* Interrupt procedure.
* Just call a user level interrupt routine.
*/
void
spigintr(int unit)
{
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[unit];
if(ss->p && ss->signal_num)
psignal(ss->p, ss->signal_num);
}
static int
spigot_mmap(dev_t dev, int offset, int nprot)
{
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[0];
if(offset != 0) {
printf("spigot mmap failed, offset = 0x%x != 0x0\n", offset);
return -1;
}
if(nprot & PROT_EXEC)
return -1;
return i386_btop(ss->maddr);
}
static spigot_devsw_installed = 0;
static void spigot_drvinit(void *unused)
{
dev_t dev;
if( ! spigot_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&spigot_cdevsw, NULL);
spigot_devsw_installed = 1;
}
}
SYSINIT(spigotdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,spigot_drvinit,NULL)
#endif /* NSPIGOT */
|
