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
|
/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
*
* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
* Coverted to new API by Alan Cox <Alan.Cox@linux.org>
* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
*
* TODO: Allow for more than one of these foolish entities :-)
*
*/
#include <linux/module.h> /* Modules */
#include <linux/init.h> /* Initdata */
#include <linux/ioport.h> /* check_region, request_region */
#include <linux/delay.h> /* udelay */
#include <asm/io.h> /* outb, outb_p */
#include <asm/uaccess.h> /* copy to/from user */
#include <linux/videodev.h> /* kernel radio structs */
#include <linux/config.h> /* CONFIG_RADIO_RTRACK2_PORT */
#include <linux/spinlock.h>
#ifndef CONFIG_RADIO_RTRACK2_PORT
#define CONFIG_RADIO_RTRACK2_PORT -1
#endif
static int io = CONFIG_RADIO_RTRACK2_PORT;
static int users = 0;
static spinlock_t lock;
struct rt_device
{
int port;
unsigned long curfreq;
int muted;
};
/* local things */
static void rt_mute(struct rt_device *dev)
{
if(dev->muted)
return;
spin_lock(&lock);
outb(1, io);
spin_unlock(&lock);
dev->muted = 1;
}
static void rt_unmute(struct rt_device *dev)
{
if(dev->muted == 0)
return;
spin_lock(&lock);
outb(0, io);
spin_unlock(&lock);
dev->muted = 0;
}
static void zero(void)
{
outb_p(1, io);
outb_p(3, io);
outb_p(1, io);
}
static void one(void)
{
outb_p(5, io);
outb_p(7, io);
outb_p(5, io);
}
static int rt_setfreq(struct rt_device *dev, unsigned long freq)
{
int i;
freq = freq / 200 + 856;
spin_lock(&lock);
outb_p(0xc8, io);
outb_p(0xc9, io);
outb_p(0xc9, io);
for (i = 0; i < 10; i++)
zero ();
for (i = 14; i >= 0; i--)
if (freq & (1 << i))
one ();
else
zero ();
outb_p(0xc8, io);
if (!dev->muted)
outb_p(0, io);
spin_unlock(&lock);
return 0;
}
static int rt_getsigstr(struct rt_device *dev)
{
if (inb(io) & 2) /* bit set = no signal present */
return 0;
return 1; /* signal present */
}
static int rt_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
{
struct rt_device *rt=dev->priv;
switch(cmd)
{
case VIDIOCGCAP:
{
struct video_capability v;
v.type=VID_TYPE_TUNER;
v.channels=1;
v.audios=1;
/* No we don't do pictures */
v.maxwidth=0;
v.maxheight=0;
v.minwidth=0;
v.minheight=0;
strcpy(v.name, "RadioTrack II");
if(copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCGTUNER:
{
struct video_tuner v;
if(copy_from_user(&v, arg,sizeof(v))!=0)
return -EFAULT;
if(v.tuner) /* Only 1 tuner */
return -EINVAL;
v.rangelow=88*16000;
v.rangehigh=108*16000;
v.flags=VIDEO_TUNER_LOW;
v.mode=VIDEO_MODE_AUTO;
v.signal=0xFFFF*rt_getsigstr(rt);
strcpy(v.name, "FM");
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSTUNER:
{
struct video_tuner v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.tuner!=0)
return -EINVAL;
/* Only 1 tuner so no setting needed ! */
return 0;
}
case VIDIOCGFREQ:
if(copy_to_user(arg, &rt->curfreq, sizeof(rt->curfreq)))
return -EFAULT;
return 0;
case VIDIOCSFREQ:
if(copy_from_user(&rt->curfreq, arg,sizeof(rt->curfreq)))
return -EFAULT;
rt_setfreq(rt, rt->curfreq);
return 0;
case VIDIOCGAUDIO:
{
struct video_audio v;
memset(&v,0, sizeof(v));
v.flags|=VIDEO_AUDIO_MUTABLE;
v.volume=1;
v.step=65535;
strcpy(v.name, "Radio");
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSAUDIO:
{
struct video_audio v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.audio)
return -EINVAL;
if(v.flags&VIDEO_AUDIO_MUTE)
rt_mute(rt);
else
rt_unmute(rt);
return 0;
}
default:
return -ENOIOCTLCMD;
}
}
static int rt_open(struct video_device *dev, int flags)
{
if(users)
return -EBUSY;
users++;
MOD_INC_USE_COUNT;
return 0;
}
static void rt_close(struct video_device *dev)
{
users--;
MOD_DEC_USE_COUNT;
}
static struct rt_device rtrack2_unit;
static struct video_device rtrack2_radio=
{
name: "RadioTrack II radio",
type: VID_TYPE_TUNER,
hardware: VID_HARDWARE_RTRACK2,
open: rt_open,
close: rt_close,
ioctl: rt_ioctl,
};
static int __init rtrack2_init(void)
{
if(io==-1)
{
printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
return -EINVAL;
}
if (request_region(io, 4, "rtrack2"))
{
printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
return -EBUSY;
}
rtrack2_radio.priv=&rtrack2_unit;
spin_lock_init(&lock);
if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO)==-1)
{
release_region(io, 4);
return -EINVAL;
}
printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
/* mute card - prevents noisy bootups */
outb(1, io);
rtrack2_unit.muted = 1;
return 0;
}
MODULE_AUTHOR("Ben Pfaff");
MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
MODULE_PARM(io, "i");
MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
EXPORT_NO_SYMBOLS;
static void __exit rtrack2_cleanup_module(void)
{
video_unregister_device(&rtrack2_radio);
release_region(io,4);
}
module_init(rtrack2_init);
module_exit(rtrack2_cleanup_module);
/*
Local variables:
compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c"
End:
*/
|
