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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [media/] [radio/] [radio-sf16fmi.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl
/* SF16FMI radio driver for Linux radio support
2
 * heavily based on rtrack driver...
3
 * (c) 1997 M. Kirkwood
4
 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
5
 *
6
 * Fitted to new interface by Alan Cox <alan.cox@linux.org>
7
 * Made working and cleaned up functions <mikael.hedin@irf.se>
8
 * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
9
 *
10
 * Notes on the hardware
11
 *
12
 *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
13
 *  No volume control - only mute/unmute - you have to use line volume
14
 *  control on SB-part of SF16FMI
15
 *
16
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
17
 */
18
 
19
#include <linux/version.h>
20
#include <linux/kernel.h>       /* __setup                      */
21
#include <linux/module.h>       /* Modules                      */
22
#include <linux/init.h>         /* Initdata                     */
23
#include <linux/ioport.h>       /* request_region               */
24
#include <linux/delay.h>        /* udelay                       */
25
#include <linux/videodev2.h>    /* kernel radio structs         */
26
#include <media/v4l2-common.h>
27
#include <linux/isapnp.h>
28
#include <asm/io.h>             /* outb, outb_p                 */
29
#include <asm/uaccess.h>        /* copy to/from user            */
30
#include <linux/mutex.h>
31
 
32
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
33
 
34
static struct v4l2_queryctrl radio_qctrl[] = {
35
        {
36
                .id            = V4L2_CID_AUDIO_MUTE,
37
                .name          = "Mute",
38
                .minimum       = 0,
39
                .maximum       = 1,
40
                .default_value = 1,
41
                .type          = V4L2_CTRL_TYPE_BOOLEAN,
42
        }
43
};
44
 
45
struct fmi_device
46
{
47
        int port;
48
        int curvol; /* 1 or 0 */
49
        unsigned long curfreq; /* freq in kHz */
50
        __u32 flags;
51
};
52
 
53
static int io = -1;
54
static int radio_nr = -1;
55
static struct pnp_dev *dev = NULL;
56
static struct mutex lock;
57
 
58
/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
59
/* It is only useful to give freq in intervall of 800 (=0.05Mhz),
60
 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
61
 * 92.7400017 -> 92.75
62
 */
63
#define RSF16_ENCODE(x) ((x)/800+214)
64
#define RSF16_MINFREQ 87*16000
65
#define RSF16_MAXFREQ 108*16000
66
 
67
static void outbits(int bits, unsigned int data, int port)
68
{
69
        while(bits--) {
70
                if(data & 1) {
71
                        outb(5, port);
72
                        udelay(6);
73
                        outb(7, port);
74
                        udelay(6);
75
                } else {
76
                        outb(1, port);
77
                        udelay(6);
78
                        outb(3, port);
79
                        udelay(6);
80
                }
81
                data>>=1;
82
        }
83
}
84
 
85
static inline void fmi_mute(int port)
86
{
87
        mutex_lock(&lock);
88
        outb(0x00, port);
89
        mutex_unlock(&lock);
90
}
91
 
92
static inline void fmi_unmute(int port)
93
{
94
        mutex_lock(&lock);
95
        outb(0x08, port);
96
        mutex_unlock(&lock);
97
}
98
 
99
static inline int fmi_setfreq(struct fmi_device *dev)
100
{
101
        int myport = dev->port;
102
        unsigned long freq = dev->curfreq;
103
 
104
        mutex_lock(&lock);
105
 
106
        outbits(16, RSF16_ENCODE(freq), myport);
107
        outbits(8, 0xC0, myport);
108
        msleep(143);            /* was schedule_timeout(HZ/7) */
109
        mutex_unlock(&lock);
110
        if (dev->curvol) fmi_unmute(myport);
111
        return 0;
112
}
113
 
114
static inline int fmi_getsigstr(struct fmi_device *dev)
115
{
116
        int val;
117
        int res;
118
        int myport = dev->port;
119
 
120
 
121
        mutex_lock(&lock);
122
        val = dev->curvol ? 0x08 : 0x00;        /* unmute/mute */
123
        outb(val, myport);
124
        outb(val | 0x10, myport);
125
        msleep(143);            /* was schedule_timeout(HZ/7) */
126
        res = (int)inb(myport+1);
127
        outb(val, myport);
128
 
129
        mutex_unlock(&lock);
130
        return (res & 2) ? 0 : 0xFFFF;
131
}
132
 
133
static int vidioc_querycap(struct file *file, void  *priv,
134
                                        struct v4l2_capability *v)
135
{
136
        strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
137
        strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
138
        sprintf(v->bus_info, "ISA");
139
        v->version = RADIO_VERSION;
140
        v->capabilities = V4L2_CAP_TUNER;
141
        return 0;
142
}
143
 
144
static int vidioc_g_tuner(struct file *file, void *priv,
145
                                        struct v4l2_tuner *v)
146
{
147
        int mult;
148
        struct video_device *dev = video_devdata(file);
149
        struct fmi_device *fmi = dev->priv;
150
 
151
        if (v->index > 0)
152
                return -EINVAL;
153
 
154
        strcpy(v->name, "FM");
155
        v->type = V4L2_TUNER_RADIO;
156
        mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
157
        v->rangelow = RSF16_MINFREQ/mult;
158
        v->rangehigh = RSF16_MAXFREQ/mult;
159
        v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
160
        v->capability = fmi->flags&V4L2_TUNER_CAP_LOW;
161
        v->audmode = V4L2_TUNER_MODE_STEREO;
162
        v->signal = fmi_getsigstr(fmi);
163
        return 0;
164
}
165
 
166
static int vidioc_s_tuner(struct file *file, void *priv,
167
                                        struct v4l2_tuner *v)
168
{
169
        if (v->index > 0)
170
                return -EINVAL;
171
        return 0;
172
}
173
 
174
static int vidioc_s_frequency(struct file *file, void *priv,
175
                                        struct v4l2_frequency *f)
176
{
177
        struct video_device *dev = video_devdata(file);
178
        struct fmi_device *fmi = dev->priv;
179
 
180
        if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
181
                f->frequency *= 1000;
182
        if (f->frequency < RSF16_MINFREQ ||
183
                        f->frequency > RSF16_MAXFREQ )
184
                return -EINVAL;
185
        /*rounding in steps of 800 to match th freq
186
        that will be used */
187
        fmi->curfreq = (f->frequency/800)*800;
188
        fmi_setfreq(fmi);
189
        return 0;
190
}
191
 
192
static int vidioc_g_frequency(struct file *file, void *priv,
193
                                        struct v4l2_frequency *f)
194
{
195
        struct video_device *dev = video_devdata(file);
196
        struct fmi_device *fmi = dev->priv;
197
 
198
        f->type = V4L2_TUNER_RADIO;
199
        f->frequency = fmi->curfreq;
200
        if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
201
                f->frequency /= 1000;
202
        return 0;
203
}
204
 
205
static int vidioc_queryctrl(struct file *file, void *priv,
206
                                        struct v4l2_queryctrl *qc)
207
{
208
        int i;
209
 
210
        for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
211
                if (qc->id && qc->id == radio_qctrl[i].id) {
212
                        memcpy(qc, &(radio_qctrl[i]),
213
                                                sizeof(*qc));
214
                        return 0;
215
                }
216
        }
217
        return -EINVAL;
218
}
219
 
220
static int vidioc_g_ctrl(struct file *file, void *priv,
221
                                        struct v4l2_control *ctrl)
222
{
223
        struct video_device *dev = video_devdata(file);
224
        struct fmi_device *fmi = dev->priv;
225
 
226
        switch (ctrl->id) {
227
        case V4L2_CID_AUDIO_MUTE:
228
                ctrl->value = fmi->curvol;
229
                return 0;
230
        }
231
        return -EINVAL;
232
}
233
 
234
static int vidioc_s_ctrl(struct file *file, void *priv,
235
                                        struct v4l2_control *ctrl)
236
{
237
        struct video_device *dev = video_devdata(file);
238
        struct fmi_device *fmi = dev->priv;
239
 
240
        switch (ctrl->id) {
241
        case V4L2_CID_AUDIO_MUTE:
242
                if (ctrl->value)
243
                        fmi_mute(fmi->port);
244
                else
245
                        fmi_unmute(fmi->port);
246
                fmi->curvol = ctrl->value;
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 fmi_device fmi_unit;
285
 
286
static const struct file_operations fmi_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 fmi_radio=
296
{
297
        .owner          = THIS_MODULE,
298
        .name           = "SF16FMx radio",
299
        .type           = VID_TYPE_TUNER,
300
        .fops           = &fmi_fops,
301
        .vidioc_querycap    = vidioc_querycap,
302
        .vidioc_g_tuner     = vidioc_g_tuner,
303
        .vidioc_s_tuner     = vidioc_s_tuner,
304
        .vidioc_g_audio     = vidioc_g_audio,
305
        .vidioc_s_audio     = vidioc_s_audio,
306
        .vidioc_g_input     = vidioc_g_input,
307
        .vidioc_s_input     = vidioc_s_input,
308
        .vidioc_g_frequency = vidioc_g_frequency,
309
        .vidioc_s_frequency = vidioc_s_frequency,
310
        .vidioc_queryctrl   = vidioc_queryctrl,
311
        .vidioc_g_ctrl      = vidioc_g_ctrl,
312
        .vidioc_s_ctrl      = vidioc_s_ctrl,
313
};
314
 
315
/* ladis: this is my card. does any other types exist? */
316
static struct isapnp_device_id id_table[] __devinitdata = {
317
        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
318
                ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
319
        {       ISAPNP_CARD_END, },
320
};
321
 
322
MODULE_DEVICE_TABLE(isapnp, id_table);
323
 
324
static int isapnp_fmi_probe(void)
325
{
326
        int i = 0;
327
 
328
        while (id_table[i].card_vendor != 0 && dev == NULL) {
329
                dev = pnp_find_dev(NULL, id_table[i].vendor,
330
                                   id_table[i].function, NULL);
331
                i++;
332
        }
333
 
334
        if (!dev)
335
                return -ENODEV;
336
        if (pnp_device_attach(dev) < 0)
337
                return -EAGAIN;
338
        if (pnp_activate_dev(dev) < 0) {
339
                printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
340
                pnp_device_detach(dev);
341
                return -ENOMEM;
342
        }
343
        if (!pnp_port_valid(dev, 0)) {
344
                pnp_device_detach(dev);
345
                return -ENODEV;
346
        }
347
 
348
        i = pnp_port_start(dev, 0);
349
        printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
350
 
351
        return i;
352
}
353
 
354
static int __init fmi_init(void)
355
{
356
        if (io < 0)
357
                io = isapnp_fmi_probe();
358
        if (io < 0) {
359
                printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
360
                return io;
361
        }
362
        if (!request_region(io, 2, "radio-sf16fmi")) {
363
                printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
364
                return -EBUSY;
365
        }
366
 
367
        fmi_unit.port = io;
368
        fmi_unit.curvol = 0;
369
        fmi_unit.curfreq = 0;
370
        fmi_unit.flags = V4L2_TUNER_CAP_LOW;
371
        fmi_radio.priv = &fmi_unit;
372
 
373
        mutex_init(&lock);
374
 
375
        if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) {
376
                release_region(io, 2);
377
                return -EINVAL;
378
        }
379
 
380
        printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
381
        /* mute card - prevents noisy bootups */
382
        fmi_mute(io);
383
        return 0;
384
}
385
 
386
MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
387
MODULE_DESCRIPTION("A driver for the SF16MI radio.");
388
MODULE_LICENSE("GPL");
389
 
390
module_param(io, int, 0);
391
MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
392
module_param(radio_nr, int, 0);
393
 
394
static void __exit fmi_cleanup_module(void)
395
{
396
        video_unregister_device(&fmi_radio);
397
        release_region(io, 2);
398
        if (dev)
399
                pnp_device_detach(dev);
400
}
401
 
402
module_init(fmi_init);
403
module_exit(fmi_cleanup_module);

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