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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [media/] [radio/] [radio-rtrack2.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl
/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
2
 *
3
 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
4
 * Converted to new API by Alan Cox <Alan.Cox@linux.org>
5
 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
6
 *
7
 * TODO: Allow for more than one of these foolish entities :-)
8
 *
9
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
10
 */
11
 
12
#include <linux/module.h>       /* Modules                      */
13
#include <linux/init.h>         /* Initdata                     */
14
#include <linux/ioport.h>       /* request_region               */
15
#include <linux/delay.h>        /* udelay                       */
16
#include <asm/io.h>             /* outb, outb_p                 */
17
#include <asm/uaccess.h>        /* copy to/from user            */
18
#include <linux/videodev2.h>    /* kernel radio structs         */
19
#include <media/v4l2-common.h>
20
#include <linux/spinlock.h>
21
 
22
#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
23
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
24
 
25
static struct v4l2_queryctrl radio_qctrl[] = {
26
        {
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                .id            = V4L2_CID_AUDIO_MUTE,
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                .name          = "Mute",
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                .minimum       = 0,
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                .maximum       = 1,
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                .default_value = 1,
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                .type          = V4L2_CTRL_TYPE_BOOLEAN,
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        },{
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                .id            = V4L2_CID_AUDIO_VOLUME,
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                .name          = "Volume",
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                .minimum       = 0,
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                .maximum       = 65535,
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                .step          = 65535,
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                .default_value = 0xff,
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                .type          = V4L2_CTRL_TYPE_INTEGER,
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        }
42
};
43
 
44
#ifndef CONFIG_RADIO_RTRACK2_PORT
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#define CONFIG_RADIO_RTRACK2_PORT -1
46
#endif
47
 
48
static int io = CONFIG_RADIO_RTRACK2_PORT;
49
static int radio_nr = -1;
50
static spinlock_t lock;
51
 
52
struct rt_device
53
{
54
        int port;
55
        unsigned long curfreq;
56
        int muted;
57
};
58
 
59
 
60
/* local things */
61
 
62
static void rt_mute(struct rt_device *dev)
63
{
64
        if(dev->muted)
65
                return;
66
        spin_lock(&lock);
67
        outb(1, io);
68
        spin_unlock(&lock);
69
        dev->muted = 1;
70
}
71
 
72
static void rt_unmute(struct rt_device *dev)
73
{
74
        if(dev->muted == 0)
75
                return;
76
        spin_lock(&lock);
77
        outb(0, io);
78
        spin_unlock(&lock);
79
        dev->muted = 0;
80
}
81
 
82
static void zero(void)
83
{
84
        outb_p(1, io);
85
        outb_p(3, io);
86
        outb_p(1, io);
87
}
88
 
89
static void one(void)
90
{
91
        outb_p(5, io);
92
        outb_p(7, io);
93
        outb_p(5, io);
94
}
95
 
96
static int rt_setfreq(struct rt_device *dev, unsigned long freq)
97
{
98
        int i;
99
 
100
        freq = freq / 200 + 856;
101
 
102
        spin_lock(&lock);
103
 
104
        outb_p(0xc8, io);
105
        outb_p(0xc9, io);
106
        outb_p(0xc9, io);
107
 
108
        for (i = 0; i < 10; i++)
109
                zero ();
110
 
111
        for (i = 14; i >= 0; i--)
112
                if (freq & (1 << i))
113
                        one ();
114
                else
115
                        zero ();
116
 
117
        outb_p(0xc8, io);
118
        if (!dev->muted)
119
                outb_p(0, io);
120
 
121
        spin_unlock(&lock);
122
        return 0;
123
}
124
 
125
static int vidioc_querycap(struct file *file, void *priv,
126
                                struct v4l2_capability *v)
127
{
128
        strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
129
        strlcpy(v->card, "RadioTrack II", sizeof(v->card));
130
        sprintf(v->bus_info, "ISA");
131
        v->version = RADIO_VERSION;
132
        v->capabilities = V4L2_CAP_TUNER;
133
        return 0;
134
}
135
 
136
static int vidioc_s_tuner(struct file *file, void *priv,
137
                                struct v4l2_tuner *v)
138
{
139
        if (v->index > 0)
140
                return -EINVAL;
141
 
142
        return 0;
143
}
144
 
145
static int rt_getsigstr(struct rt_device *dev)
146
{
147
        if (inb(io) & 2)        /* bit set = no signal present  */
148
                return 0;
149
        return 1;               /* signal present               */
150
}
151
 
152
static int vidioc_g_tuner(struct file *file, void *priv,
153
                                struct v4l2_tuner *v)
154
{
155
        struct video_device *dev = video_devdata(file);
156
        struct rt_device *rt = dev->priv;
157
 
158
        if (v->index > 0)
159
                return -EINVAL;
160
 
161
        strcpy(v->name, "FM");
162
        v->type = V4L2_TUNER_RADIO;
163
        v->rangelow = (88*16000);
164
        v->rangehigh = (108*16000);
165
        v->rxsubchans = V4L2_TUNER_SUB_MONO;
166
        v->capability = V4L2_TUNER_CAP_LOW;
167
        v->audmode = V4L2_TUNER_MODE_MONO;
168
        v->signal = 0xFFFF*rt_getsigstr(rt);
169
        return 0;
170
}
171
 
172
static int vidioc_s_frequency(struct file *file, void *priv,
173
                                struct v4l2_frequency *f)
174
{
175
        struct video_device *dev = video_devdata(file);
176
        struct rt_device *rt = dev->priv;
177
 
178
        rt->curfreq = f->frequency;
179
        rt_setfreq(rt, rt->curfreq);
180
        return 0;
181
}
182
 
183
static int vidioc_g_frequency(struct file *file, void *priv,
184
                                struct v4l2_frequency *f)
185
{
186
        struct video_device *dev = video_devdata(file);
187
        struct rt_device *rt = dev->priv;
188
 
189
        f->type = V4L2_TUNER_RADIO;
190
        f->frequency = rt->curfreq;
191
        return 0;
192
}
193
 
194
static int vidioc_queryctrl(struct file *file, void *priv,
195
                                struct v4l2_queryctrl *qc)
196
{
197
        int i;
198
 
199
        for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
200
                if (qc->id && qc->id == radio_qctrl[i].id) {
201
                        memcpy(qc, &(radio_qctrl[i]),
202
                                                sizeof(*qc));
203
                        return 0;
204
                }
205
        }
206
        return -EINVAL;
207
}
208
 
209
static int vidioc_g_ctrl(struct file *file, void *priv,
210
                                struct v4l2_control *ctrl)
211
{
212
        struct video_device *dev = video_devdata(file);
213
        struct rt_device *rt = dev->priv;
214
 
215
        switch (ctrl->id) {
216
        case V4L2_CID_AUDIO_MUTE:
217
                ctrl->value = rt->muted;
218
                return 0;
219
        case V4L2_CID_AUDIO_VOLUME:
220
                if (rt->muted)
221
                        ctrl->value = 0;
222
                else
223
                        ctrl->value = 65535;
224
                return 0;
225
        }
226
        return -EINVAL;
227
}
228
 
229
static int vidioc_s_ctrl(struct file *file, void *priv,
230
                                struct v4l2_control *ctrl)
231
{
232
        struct video_device *dev = video_devdata(file);
233
        struct rt_device *rt = dev->priv;
234
 
235
        switch (ctrl->id) {
236
        case V4L2_CID_AUDIO_MUTE:
237
                if (ctrl->value)
238
                        rt_mute(rt);
239
                else
240
                        rt_unmute(rt);
241
                return 0;
242
        case V4L2_CID_AUDIO_VOLUME:
243
                if (ctrl->value)
244
                        rt_unmute(rt);
245
                else
246
                        rt_mute(rt);
247
                return 0;
248
        }
249
        return -EINVAL;
250
}
251
 
252
static int vidioc_g_audio(struct file *file, void *priv,
253
                                struct v4l2_audio *a)
254
{
255
        if (a->index > 1)
256
                return -EINVAL;
257
 
258
        strcpy(a->name, "Radio");
259
        a->capability = V4L2_AUDCAP_STEREO;
260
        return 0;
261
}
262
 
263
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
264
{
265
        *i = 0;
266
        return 0;
267
}
268
 
269
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
270
{
271
        if (i != 0)
272
                return -EINVAL;
273
        return 0;
274
}
275
 
276
static int vidioc_s_audio(struct file *file, void *priv,
277
                                struct v4l2_audio *a)
278
{
279
        if (a->index != 0)
280
                return -EINVAL;
281
        return 0;
282
}
283
 
284
static struct rt_device rtrack2_unit;
285
 
286
static const struct file_operations rtrack2_fops = {
287
        .owner          = THIS_MODULE,
288
        .open           = video_exclusive_open,
289
        .release        = video_exclusive_release,
290
        .ioctl          = video_ioctl2,
291
        .compat_ioctl   = v4l_compat_ioctl32,
292
        .llseek         = no_llseek,
293
};
294
 
295
static struct video_device rtrack2_radio=
296
{
297
        .owner          = THIS_MODULE,
298
        .name           = "RadioTrack II radio",
299
        .type           = VID_TYPE_TUNER,
300
        .fops           = &rtrack2_fops,
301
        .vidioc_querycap    = vidioc_querycap,
302
        .vidioc_g_tuner     = vidioc_g_tuner,
303
        .vidioc_s_tuner     = vidioc_s_tuner,
304
        .vidioc_g_frequency = vidioc_g_frequency,
305
        .vidioc_s_frequency = vidioc_s_frequency,
306
        .vidioc_queryctrl   = vidioc_queryctrl,
307
        .vidioc_g_ctrl      = vidioc_g_ctrl,
308
        .vidioc_s_ctrl      = vidioc_s_ctrl,
309
        .vidioc_g_audio     = vidioc_g_audio,
310
        .vidioc_s_audio     = vidioc_s_audio,
311
        .vidioc_g_input     = vidioc_g_input,
312
        .vidioc_s_input     = vidioc_s_input,
313
};
314
 
315
static int __init rtrack2_init(void)
316
{
317
        if(io==-1)
318
        {
319
                printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
320
                return -EINVAL;
321
        }
322
        if (!request_region(io, 4, "rtrack2"))
323
        {
324
                printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
325
                return -EBUSY;
326
        }
327
 
328
        rtrack2_radio.priv=&rtrack2_unit;
329
 
330
        spin_lock_init(&lock);
331
        if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
332
        {
333
                release_region(io, 4);
334
                return -EINVAL;
335
        }
336
 
337
        printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
338
 
339
        /* mute card - prevents noisy bootups */
340
        outb(1, io);
341
        rtrack2_unit.muted = 1;
342
 
343
        return 0;
344
}
345
 
346
MODULE_AUTHOR("Ben Pfaff");
347
MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
348
MODULE_LICENSE("GPL");
349
 
350
module_param(io, int, 0);
351
MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
352
module_param(radio_nr, int, 0);
353
 
354
static void __exit rtrack2_cleanup_module(void)
355
{
356
        video_unregister_device(&rtrack2_radio);
357
        release_region(io,4);
358
}
359
 
360
module_init(rtrack2_init);
361
module_exit(rtrack2_cleanup_module);
362
 
363
/*
364
  Local variables:
365
  compile-command: "mmake"
366
  End:
367
*/

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