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 <media/v4l2-common.h>
23 #include <linux/mutex.h>
25 static struct mutex lock;
31 # define debug_print(s) printk s
33 # define debug_print(s)
36 /* this should be static vars for module size */
40 int curvol; /* 0-65535, if not volume 0 or 65535 */
42 int stereo; /* card is producing stereo audio */
43 unsigned long curfreq; /* freq in kHz */
48 static int io = 0x384;
49 static int radio_nr = -1;
51 /* hw precision is 12.5 kHz
52 * It is only useful to give freq in intervall of 200 (=0.0125Mhz),
53 * other bits will be truncated
55 #define RSF16_ENCODE(x) ((x)/200+856)
56 #define RSF16_MINFREQ 87*16000
57 #define RSF16_MAXFREQ 108*16000
59 static inline void wait(int n,int port)
61 for (;n;--n) inb(port);
64 static void outbits(int bits, unsigned int data, int nWait, int port)
68 bit = (data>>bits) & 1;
78 static inline void fmr2_mute(int port)
84 static inline void fmr2_unmute(int port)
90 static inline int fmr2_stereo_mode(int port)
96 debug_print((KERN_DEBUG "stereo: %d\n", n));
100 static int fmr2_product_info(struct fmr2_device *dev)
102 int n = inb(dev->port);
106 /* this should support volume set */
110 /* not volume (mine is 11) */
111 dev->card_type = (n==128)?11:0;
115 static inline int fmr2_getsigstr(struct fmr2_device *dev)
117 /* !!! work only if scanning freq */
118 int port = dev->port, res = 0xffff;
121 if (!(inb(port)&1)) res = 0;
122 debug_print((KERN_DEBUG "signal: %d\n", res));
126 /* set frequency and unmute card */
127 static int fmr2_setfreq(struct fmr2_device *dev)
129 int port = dev->port;
130 unsigned long freq = dev->curfreq;
134 /* 0x42 for mono output
135 * 0x102 forward scanning
136 * 0x182 scansione avanti
138 outbits(9,0x2,3,port);
139 outbits(16,RSF16_ENCODE(freq),2,port);
146 /* NOTE if mute this stop radio
147 you must set freq on unmute */
148 dev->stereo = fmr2_stereo_mode(port);
152 /* !!! not tested, in my card this does't work !!! */
153 static int fmr2_setvolume(struct fmr2_device *dev)
155 int i,a,n, port = dev->port;
157 if (dev->card_type != 11) return 1;
159 switch( (dev->curvol+(1<<11)) >> 12 )
161 case 0: case 1: n = 0x21; break;
162 case 2: n = 0x84; break;
163 case 3: n = 0x90; break;
164 case 4: n = 0x104; break;
165 case 5: n = 0x110; break;
166 case 6: n = 0x204; break;
167 case 7: n = 0x210; break;
168 case 8: n = 0x402; break;
169 case 9: n = 0x404; break;
171 case 10: n = 0x408; break;
172 case 11: n = 0x410; break;
173 case 12: n = 0x801; break;
174 case 13: n = 0x802; break;
175 case 14: n = 0x804; break;
176 case 15: n = 0x808; break;
177 case 16: n = 0x810; break;
181 a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */
191 a = ((0x18 >> i) & 1) << 6;
205 static int fmr2_do_ioctl(struct inode *inode, struct file *file,
206 unsigned int cmd, void *arg)
208 struct video_device *dev = video_devdata(file);
209 struct fmr2_device *fmr2 = dev->priv;
210 debug_print((KERN_DEBUG "freq %ld flags %d vol %d mute %d "
211 "stereo %d type %d\n",
212 fmr2->curfreq, fmr2->flags, fmr2->curvol, fmr2->mute,
213 fmr2->stereo, fmr2->card_type));
219 struct video_capability *v = arg;
220 memset(v,0,sizeof(*v));
221 strcpy(v->name, "SF16-FMR2 radio");
222 v->type=VID_TYPE_TUNER;
229 struct video_tuner *v = arg;
232 if(v->tuner) /* Only 1 tuner */
234 strcpy(v->name, "FM");
235 mult = (fmr2->flags & VIDEO_TUNER_LOW) ? 1 : 1000;
236 v->rangelow = RSF16_MINFREQ/mult;
237 v->rangehigh = RSF16_MAXFREQ/mult;
238 v->flags = fmr2->flags | VIDEO_AUDIO_MUTABLE;
240 v->flags |= VIDEO_AUDIO_MUTE;
241 v->mode=VIDEO_MODE_AUTO;
243 v->signal = fmr2_getsigstr(fmr2);
249 struct video_tuner *v = arg;
252 fmr2->flags = v->flags & VIDEO_TUNER_LOW;
257 unsigned long *freq = arg;
258 *freq = fmr2->curfreq;
259 if (!(fmr2->flags & VIDEO_TUNER_LOW))
265 unsigned long *freq = arg;
266 if (!(fmr2->flags & VIDEO_TUNER_LOW))
268 if ( *freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ )
270 /* rounding in steps of 200 to match th freq
273 fmr2->curfreq = (*freq/200)*200;
275 /* set card freq (if not muted) */
276 if (fmr2->curvol && !fmr2->mute)
286 struct video_audio *v = arg;
287 memset(v,0,sizeof(*v));
288 /* !!! do not return VIDEO_AUDIO_MUTE */
289 v->flags = VIDEO_AUDIO_MUTABLE;
290 strcpy(v->name, "Radio");
291 /* get current stereo mode */
292 v->mode = fmr2->stereo ? VIDEO_SOUND_STEREO: VIDEO_SOUND_MONO;
293 /* volume supported ? */
294 if (fmr2->card_type == 11)
296 v->flags |= VIDEO_AUDIO_VOLUME;
298 v->volume = fmr2->curvol;
300 debug_print((KERN_DEBUG "Get flags %d vol %d\n", v->flags, v->volume));
305 struct video_audio *v = arg;
308 debug_print((KERN_DEBUG "Set flags %d vol %d\n", v->flags, v->volume));
310 if (v->flags & VIDEO_AUDIO_VOLUME)
311 fmr2->curvol = v->volume; /* !!! set with precision */
312 if (fmr2->card_type != 11) fmr2->curvol = 65535;
314 if (v->flags & VIDEO_AUDIO_MUTE)
317 if (fmr2->curvol && !fmr2->mute)
318 printk(KERN_DEBUG "unmute\n");
320 printk(KERN_DEBUG "mute\n");
323 if (fmr2->curvol && !fmr2->mute)
325 fmr2_setvolume(fmr2);
328 else fmr2_mute(fmr2->port);
334 struct video_unit *v = arg;
335 v->video=VIDEO_NO_UNIT;
336 v->vbi=VIDEO_NO_UNIT;
338 v->audio=0; /* How do we find out this??? */
339 v->teletext=VIDEO_NO_UNIT;
347 static int fmr2_ioctl(struct inode *inode, struct file *file,
348 unsigned int cmd, unsigned long arg)
350 return video_usercopy(inode, file, cmd, arg, fmr2_do_ioctl);
353 static struct fmr2_device fmr2_unit;
355 static struct file_operations fmr2_fops = {
356 .owner = THIS_MODULE,
357 .open = video_exclusive_open,
358 .release = video_exclusive_release,
360 .compat_ioctl = v4l_compat_ioctl32,
364 static struct video_device fmr2_radio=
366 .owner = THIS_MODULE,
367 .name = "SF16FMR2 radio",
368 . type = VID_TYPE_TUNER,
369 .hardware = VID_HARDWARE_SF16FMR2,
373 static int __init fmr2_init(void)
376 fmr2_unit.curvol = 0;
378 fmr2_unit.curfreq = 0;
379 fmr2_unit.stereo = 1;
380 fmr2_unit.flags = VIDEO_TUNER_LOW;
381 fmr2_unit.card_type = 0;
382 fmr2_radio.priv = &fmr2_unit;
386 if (request_region(io, 2, "sf16fmr2"))
388 printk(KERN_ERR "fmr2: port 0x%x already in use\n", io);
392 if(video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
394 release_region(io, 2);
398 printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
399 debug_print((KERN_DEBUG "Mute %d Low %d\n",VIDEO_AUDIO_MUTE,VIDEO_TUNER_LOW));
400 /* mute card - prevents noisy bootups */
403 fmr2_product_info(&fmr2_unit);
405 debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type));
409 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
410 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
411 MODULE_LICENSE("GPL");
413 module_param(io, int, 0);
414 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
415 module_param(radio_nr, int, 0);
417 static void __exit fmr2_cleanup_module(void)
419 video_unregister_device(&fmr2_radio);
420 release_region(io,2);
423 module_init(fmr2_init);
424 module_exit(fmr2_cleanup_module);
428 static int __init fmr2_setup_io(char *str)
430 get_option(&str, &io);
434 __setup("sf16fmr2=", fmr2_setup_io);