1 /* SF16FMR2 radio driver for Linux radio support
2 * heavily based on fmi driver...
3 * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
5 * Notes on the hardware
7 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
8 * No volume control - only mute/unmute - you have to use line volume
10 * For read stereo/mono you must wait 0.1 sec after set frequency and
11 * card unmuted so I set frequency on unmute
12 * Signal handling seem to work only on autoscanning (not implemented)
15 #include <linux/module.h> /* Modules */
16 #include <linux/init.h> /* Initdata */
17 #include <linux/ioport.h> /* request_region */
18 #include <linux/delay.h> /* udelay */
19 #include <asm/io.h> /* outb, outb_p */
20 #include <asm/uaccess.h> /* copy to/from user */
21 #include <linux/videodev.h> /* kernel radio structs */
22 #include <linux/mutex.h>
24 static struct mutex lock;
30 # define debug_print(s) printk s
32 # define debug_print(s)
35 /* this should be static vars for module size */
39 int curvol; /* 0-65535, if not volume 0 or 65535 */
41 int stereo; /* card is producing stereo audio */
42 unsigned long curfreq; /* freq in kHz */
47 static int io = 0x384;
48 static int radio_nr = -1;
50 /* hw precision is 12.5 kHz
51 * It is only useful to give freq in intervall of 200 (=0.0125Mhz),
52 * other bits will be truncated
54 #define RSF16_ENCODE(x) ((x)/200+856)
55 #define RSF16_MINFREQ 87*16000
56 #define RSF16_MAXFREQ 108*16000
58 static inline void wait(int n,int port)
60 for (;n;--n) inb(port);
63 static void outbits(int bits, unsigned int data, int nWait, int port)
67 bit = (data>>bits) & 1;
77 static inline void fmr2_mute(int port)
83 static inline void fmr2_unmute(int port)
89 static inline int fmr2_stereo_mode(int port)
95 debug_print((KERN_DEBUG "stereo: %d\n", n));
99 static int fmr2_product_info(struct fmr2_device *dev)
101 int n = inb(dev->port);
105 /* this should support volume set */
109 /* not volume (mine is 11) */
110 dev->card_type = (n==128)?11:0;
114 static inline int fmr2_getsigstr(struct fmr2_device *dev)
116 /* !!! work only if scanning freq */
117 int port = dev->port, res = 0xffff;
120 if (!(inb(port)&1)) res = 0;
121 debug_print((KERN_DEBUG "signal: %d\n", res));
125 /* set frequency and unmute card */
126 static int fmr2_setfreq(struct fmr2_device *dev)
128 int port = dev->port;
129 unsigned long freq = dev->curfreq;
133 /* 0x42 for mono output
134 * 0x102 forward scanning
135 * 0x182 scansione avanti
137 outbits(9,0x2,3,port);
138 outbits(16,RSF16_ENCODE(freq),2,port);
145 /* NOTE if mute this stop radio
146 you must set freq on unmute */
147 dev->stereo = fmr2_stereo_mode(port);
151 /* !!! not tested, in my card this does't work !!! */
152 static int fmr2_setvolume(struct fmr2_device *dev)
154 int i,a,n, port = dev->port;
156 if (dev->card_type != 11) return 1;
158 switch( (dev->curvol+(1<<11)) >> 12 )
160 case 0: case 1: n = 0x21; break;
161 case 2: n = 0x84; break;
162 case 3: n = 0x90; break;
163 case 4: n = 0x104; break;
164 case 5: n = 0x110; break;
165 case 6: n = 0x204; break;
166 case 7: n = 0x210; break;
167 case 8: n = 0x402; break;
168 case 9: n = 0x404; break;
170 case 10: n = 0x408; break;
171 case 11: n = 0x410; break;
172 case 12: n = 0x801; break;
173 case 13: n = 0x802; break;
174 case 14: n = 0x804; break;
175 case 15: n = 0x808; break;
176 case 16: n = 0x810; break;
180 a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */
190 a = ((0x18 >> i) & 1) << 6;
204 static int fmr2_do_ioctl(struct inode *inode, struct file *file,
205 unsigned int cmd, void *arg)
207 struct video_device *dev = video_devdata(file);
208 struct fmr2_device *fmr2 = dev->priv;
209 debug_print((KERN_DEBUG "freq %ld flags %d vol %d mute %d "
210 "stereo %d type %d\n",
211 fmr2->curfreq, fmr2->flags, fmr2->curvol, fmr2->mute,
212 fmr2->stereo, fmr2->card_type));
218 struct video_capability *v = arg;
219 memset(v,0,sizeof(*v));
220 strcpy(v->name, "SF16-FMR2 radio");
221 v->type=VID_TYPE_TUNER;
228 struct video_tuner *v = arg;
231 if(v->tuner) /* Only 1 tuner */
233 strcpy(v->name, "FM");
234 mult = (fmr2->flags & VIDEO_TUNER_LOW) ? 1 : 1000;
235 v->rangelow = RSF16_MINFREQ/mult;
236 v->rangehigh = RSF16_MAXFREQ/mult;
237 v->flags = fmr2->flags | VIDEO_AUDIO_MUTABLE;
239 v->flags |= VIDEO_AUDIO_MUTE;
240 v->mode=VIDEO_MODE_AUTO;
242 v->signal = fmr2_getsigstr(fmr2);
248 struct video_tuner *v = arg;
251 fmr2->flags = v->flags & VIDEO_TUNER_LOW;
256 unsigned long *freq = arg;
257 *freq = fmr2->curfreq;
258 if (!(fmr2->flags & VIDEO_TUNER_LOW))
264 unsigned long *freq = arg;
265 if (!(fmr2->flags & VIDEO_TUNER_LOW))
267 if ( *freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ )
269 /* rounding in steps of 200 to match th freq
272 fmr2->curfreq = (*freq/200)*200;
274 /* set card freq (if not muted) */
275 if (fmr2->curvol && !fmr2->mute)
285 struct video_audio *v = arg;
286 memset(v,0,sizeof(*v));
287 /* !!! do not return VIDEO_AUDIO_MUTE */
288 v->flags = VIDEO_AUDIO_MUTABLE;
289 strcpy(v->name, "Radio");
290 /* get current stereo mode */
291 v->mode = fmr2->stereo ? VIDEO_SOUND_STEREO: VIDEO_SOUND_MONO;
292 /* volume supported ? */
293 if (fmr2->card_type == 11)
295 v->flags |= VIDEO_AUDIO_VOLUME;
297 v->volume = fmr2->curvol;
299 debug_print((KERN_DEBUG "Get flags %d vol %d\n", v->flags, v->volume));
304 struct video_audio *v = arg;
307 debug_print((KERN_DEBUG "Set flags %d vol %d\n", v->flags, v->volume));
309 if (v->flags & VIDEO_AUDIO_VOLUME)
310 fmr2->curvol = v->volume; /* !!! set with precision */
311 if (fmr2->card_type != 11) fmr2->curvol = 65535;
313 if (v->flags & VIDEO_AUDIO_MUTE)
316 if (fmr2->curvol && !fmr2->mute)
317 printk(KERN_DEBUG "unmute\n");
319 printk(KERN_DEBUG "mute\n");
322 if (fmr2->curvol && !fmr2->mute)
324 fmr2_setvolume(fmr2);
327 else fmr2_mute(fmr2->port);
333 struct video_unit *v = arg;
334 v->video=VIDEO_NO_UNIT;
335 v->vbi=VIDEO_NO_UNIT;
337 v->audio=0; /* How do we find out this??? */
338 v->teletext=VIDEO_NO_UNIT;
346 static int fmr2_ioctl(struct inode *inode, struct file *file,
347 unsigned int cmd, unsigned long arg)
349 return video_usercopy(inode, file, cmd, arg, fmr2_do_ioctl);
352 static struct fmr2_device fmr2_unit;
354 static struct file_operations fmr2_fops = {
355 .owner = THIS_MODULE,
356 .open = video_exclusive_open,
357 .release = video_exclusive_release,
359 .compat_ioctl = v4l_compat_ioctl32,
363 static struct video_device fmr2_radio=
365 .owner = THIS_MODULE,
366 .name = "SF16FMR2 radio",
367 . type = VID_TYPE_TUNER,
368 .hardware = VID_HARDWARE_SF16FMR2,
372 static int __init fmr2_init(void)
375 fmr2_unit.curvol = 0;
377 fmr2_unit.curfreq = 0;
378 fmr2_unit.stereo = 1;
379 fmr2_unit.flags = VIDEO_TUNER_LOW;
380 fmr2_unit.card_type = 0;
381 fmr2_radio.priv = &fmr2_unit;
385 if (request_region(io, 2, "sf16fmr2"))
387 printk(KERN_ERR "fmr2: port 0x%x already in use\n", io);
391 if(video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
393 release_region(io, 2);
397 printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
398 debug_print((KERN_DEBUG "Mute %d Low %d\n",VIDEO_AUDIO_MUTE,VIDEO_TUNER_LOW));
399 /* mute card - prevents noisy bootups */
402 fmr2_product_info(&fmr2_unit);
404 debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type));
408 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
409 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
410 MODULE_LICENSE("GPL");
412 module_param(io, int, 0);
413 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
414 module_param(radio_nr, int, 0);
416 static void __exit fmr2_cleanup_module(void)
418 video_unregister_device(&fmr2_radio);
419 release_region(io,2);
422 module_init(fmr2_init);
423 module_exit(fmr2_cleanup_module);
427 static int __init fmr2_setup_io(char *str)
429 get_option(&str, &io);
433 __setup("sf16fmr2=", fmr2_setup_io);