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
|
/*
* Zoltrix Radio Plus driver
* Copyright 1998 C. van Schaik <carl@leg.uct.ac.za>
*
* BUGS
* Due to the inconsistency in reading from the signal flags
* it is difficult to get an accurate tuned signal.
*
* It seems that the card is not linear to 0 volume. It cuts off
* at a low volume, and it is not possible (at least I have not found)
* to get fine volume control over the low volume range.
*
* Some code derived from code by Romolo Manfredini
* romolo@bicnet.it
*
* 1999-05-06 - (C. van Schaik)
* - Make signal strength and stereo scans
* kinder to cpu while in delay
* 1999-01-05 - (C. van Schaik)
* - Changed tuning to 1/160Mhz accuracy
* - Added stereo support
* (card defaults to stereo)
* (can explicitly force mono on the card)
* (can detect if station is in stereo)
* - Added unmute function
* - Reworked ioctl functions
* 2002-07-15 - Fix Stereo typo
*
* 2006-07-24 - Converted to V4L2 API
* by Mauro Carvalho Chehab <mchehab@infradead.org>
*
* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
*
* Note that this is the driver for the Zoltrix Radio Plus.
* This driver does not work for the Zoltrix Radio Plus 108 or the
* Zoltrix Radio Plus for Windows.
*
* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
*/
#include <linux/module.h> /* Modules */
#include <linux/init.h> /* Initdata */
#include <linux/ioport.h> /* request_region */
#include <linux/delay.h> /* udelay, msleep */
#include <linux/videodev2.h> /* kernel radio structs */
#include <linux/mutex.h>
#include <linux/io.h> /* outb, outb_p */
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include "radio-isa.h"
MODULE_AUTHOR("C. van Schaik");
MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.1.99");
#ifndef CONFIG_RADIO_ZOLTRIX_PORT
#define CONFIG_RADIO_ZOLTRIX_PORT -1
#endif
#define ZOLTRIX_MAX 2
static int io[ZOLTRIX_MAX] = { [0] = CONFIG_RADIO_ZOLTRIX_PORT,
[1 ... (ZOLTRIX_MAX - 1)] = -1 };
static int radio_nr[ZOLTRIX_MAX] = { [0 ... (ZOLTRIX_MAX - 1)] = -1 };
module_param_array(io, int, NULL, 0444);
MODULE_PARM_DESC(io, "I/O addresses of the Zoltrix Radio Plus card (0x20c or 0x30c)");
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(radio_nr, "Radio device numbers");
struct zoltrix {
struct radio_isa_card isa;
int curvol;
bool muted;
};
static struct radio_isa_card *zoltrix_alloc(void)
{
struct zoltrix *zol = kzalloc(sizeof(*zol), GFP_KERNEL);
return zol ? &zol->isa : NULL;
}
static int zoltrix_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
{
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
zol->curvol = vol;
zol->muted = mute;
if (mute || vol == 0) {
outb(0, isa->io);
outb(0, isa->io);
inb(isa->io + 3); /* Zoltrix needs to be read to confirm */
return 0;
}
outb(vol - 1, isa->io);
msleep(10);
inb(isa->io + 2);
return 0;
}
/* tunes the radio to the desired frequency */
static int zoltrix_s_frequency(struct radio_isa_card *isa, u32 freq)
{
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
struct v4l2_device *v4l2_dev = &isa->v4l2_dev;
unsigned long long bitmask, f, m;
bool stereo = isa->stereo;
int i;
if (freq == 0) {
v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n");
return -EINVAL;
}
m = (freq / 160 - 8800) * 2;
f = (unsigned long long)m + 0x4d1c;
bitmask = 0xc480402c10080000ull;
i = 45;
outb(0, isa->io);
outb(0, isa->io);
inb(isa->io + 3); /* Zoltrix needs to be read to confirm */
outb(0x40, isa->io);
outb(0xc0, isa->io);
bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31));
while (i--) {
if ((bitmask & 0x8000000000000000ull) != 0) {
outb(0x80, isa->io);
udelay(50);
outb(0x00, isa->io);
udelay(50);
outb(0x80, isa->io);
udelay(50);
} else {
outb(0xc0, isa->io);
udelay(50);
outb(0x40, isa->io);
udelay(50);
outb(0xc0, isa->io);
udelay(50);
}
bitmask *= 2;
}
/* termination sequence */
outb(0x80, isa->io);
outb(0xc0, isa->io);
outb(0x40, isa->io);
udelay(1000);
inb(isa->io + 2);
udelay(1000);
return zoltrix_s_mute_volume(isa, zol->muted, zol->curvol);
}
/* Get signal strength */
static u32 zoltrix_g_rxsubchans(struct radio_isa_card *isa)
{
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
int a, b;
outb(0x00, isa->io); /* This stuff I found to do nothing */
outb(zol->curvol, isa->io);
msleep(20);
a = inb(isa->io);
msleep(10);
b = inb(isa->io);
return (a == b && a == 0xcf) ?
V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
}
static u32 zoltrix_g_signal(struct radio_isa_card *isa)
{
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
int a, b;
outb(0x00, isa->io); /* This stuff I found to do nothing */
outb(zol->curvol, isa->io);
msleep(20);
a = inb(isa->io);
msleep(10);
b = inb(isa->io);
if (a != b)
return 0;
/* I found this out by playing with a binary scanner on the card io */
return (a == 0xcf || a == 0xdf || a == 0xef) ? 0xffff : 0;
}
static int zoltrix_s_stereo(struct radio_isa_card *isa, bool stereo)
{
return zoltrix_s_frequency(isa, isa->freq);
}
static const struct radio_isa_ops zoltrix_ops = {
.alloc = zoltrix_alloc,
.s_mute_volume = zoltrix_s_mute_volume,
.s_frequency = zoltrix_s_frequency,
.s_stereo = zoltrix_s_stereo,
.g_rxsubchans = zoltrix_g_rxsubchans,
.g_signal = zoltrix_g_signal,
};
static const int zoltrix_ioports[] = { 0x20c, 0x30c };
static struct radio_isa_driver zoltrix_driver = {
.driver = {
.match = radio_isa_match,
.probe = radio_isa_probe,
.remove = radio_isa_remove,
.driver = {
.name = "radio-zoltrix",
},
},
.io_params = io,
.radio_nr_params = radio_nr,
.io_ports = zoltrix_ioports,
.num_of_io_ports = ARRAY_SIZE(zoltrix_ioports),
.region_size = 2,
.card = "Zoltrix Radio Plus",
.ops = &zoltrix_ops,
.has_stereo = true,
.max_volume = 15,
};
static int __init zoltrix_init(void)
{
return isa_register_driver(&zoltrix_driver.driver, ZOLTRIX_MAX);
}
static void __exit zoltrix_exit(void)
{
isa_unregister_driver(&zoltrix_driver.driver);
}
module_init(zoltrix_init);
module_exit(zoltrix_exit);
|
