SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/radio/radio-sf16fmr2.c

   1 /* SF16FMR2 radio driver for Linux radio support
   2  * heavily based on fmi driver...
   3  * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
   4  *
   5  * Notes on the hardware
   6  *
   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
   9  *
  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)
  13  *
  14  *  Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  15  */
  16
  17 #include <linux/module.h>       /* Modules                      */
  18 #include <linux/init.h>         /* Initdata                     */
  19 #include <linux/ioport.h>       /* request_region               */
  20 #include <linux/delay.h>        /* udelay                       */
  21 #include <asm/io.h>             /* outb, outb_p                 */
  22 #include <asm/uaccess.h>        /* copy to/from user            */
  23 #include <linux/videodev2.h>    /* kernel radio structs         */
  24 #include <media/v4l2-common.h>
  25 #include <linux/mutex.h>
  26
  27 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
  28
  29 static struct v4l2_queryctrl radio_qctrl[] = {
  30         {
  31                 .id            = V4L2_CID_AUDIO_MUTE,
  32                 .name          = "Mute",
  33                 .minimum       = 0,
  34                 .maximum       = 1,
  35                 .default_value = 1,
  36                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
  37         },{
  38                 .id            = V4L2_CID_AUDIO_VOLUME,
  39                 .name          = "Volume",
  40                 .minimum       = 0,
  41                 .maximum       = 65535,
  42                 .step          = 1<<12,
  43                 .default_value = 0xff,
  44                 .type          = V4L2_CTRL_TYPE_INTEGER,
  45         }
  46 };
  47
  48 static struct mutex lock;
  49
  50 #undef DEBUG
  51 //#define DEBUG 1
  52
  53 #ifdef DEBUG
  54 # define  debug_print(s) printk s
  55 #else
  56 # define  debug_print(s)
  57 #endif
  58
  59 /* this should be static vars for module size */
  60 struct fmr2_device
  61 {
  62         int port;
  63         int curvol; /* 0-65535, if not volume 0 or 65535 */
  64         int mute;
  65         int stereo; /* card is producing stereo audio */
  66         unsigned long curfreq; /* freq in kHz */
  67         int card_type;
  68         __u32 flags;
  69 };
  70
  71 static int io = 0x384;
  72 static int radio_nr = -1;
  73
  74 /* hw precision is 12.5 kHz
  75  * It is only useful to give freq in intervall of 200 (=0.0125Mhz),
  76  * other bits will be truncated
  77  */
  78 #define RSF16_ENCODE(x) ((x)/200+856)
  79 #define RSF16_MINFREQ 87*16000
  80 #define RSF16_MAXFREQ 108*16000
  81
  82 static inline void wait(int n,int port)
  83 {
  84         for (;n;--n) inb(port);
  85 }
  86
  87 static void outbits(int bits, unsigned int data, int nWait, int port)
  88 {
  89         int bit;
  90         for(;--bits>=0;) {
  91                 bit = (data>>bits) & 1;
  92                 outb(bit,port);
  93                 wait(nWait,port);
  94                 outb(bit|2,port);
  95                 wait(nWait,port);
  96                 outb(bit,port);
  97                 wait(nWait,port);
  98         }
  99 }
 100
 101 static inline void fmr2_mute(int port)
 102 {
 103         outb(0x00, port);
 104         wait(4,port);
 105 }
 106
 107 static inline void fmr2_unmute(int port)
 108 {
 109         outb(0x04, port);
 110         wait(4,port);
 111 }
 112
 113 static inline int fmr2_stereo_mode(int port)
 114 {
 115         int n = inb(port);
 116         outb(6,port);
 117         inb(port);
 118         n = ((n>>3)&1)^1;
 119         debug_print((KERN_DEBUG "stereo: %d\n", n));
 120         return n;
 121 }
 122
 123 static int fmr2_product_info(struct fmr2_device *dev)
 124 {
 125         int n = inb(dev->port);
 126         n &= 0xC1;
 127         if (n == 0)
 128         {
 129                 /* this should support volume set */
 130                 dev->card_type = 12;
 131                 return 0;
 132         }
 133         /* not volume (mine is 11) */
 134         dev->card_type = (n==128)?11:0;
 135         return n;
 136 }
 137
 138 static inline int fmr2_getsigstr(struct fmr2_device *dev)
 139 {
 140         /* !!! work only if scanning freq */
 141         int port = dev->port, res = 0xffff;
 142         outb(5,port);
 143         wait(4,port);
 144         if (!(inb(port)&1)) res = 0;
 145         debug_print((KERN_DEBUG "signal: %d\n", res));
 146         return res;
 147 }
 148
 149 /* set frequency and unmute card */
 150 static int fmr2_setfreq(struct fmr2_device *dev)
 151 {
 152         int port = dev->port;
 153         unsigned long freq = dev->curfreq;
 154
 155         fmr2_mute(port);
 156
 157         /* 0x42 for mono output
 158          * 0x102 forward scanning
 159          * 0x182 scansione avanti
 160          */
 161         outbits(9,0x2,3,port);
 162         outbits(16,RSF16_ENCODE(freq),2,port);
 163
 164         fmr2_unmute(port);
 165
 166         /* wait 0.11 sec */
 167         msleep(110);
 168
 169         /* NOTE if mute this stop radio
 170            you must set freq on unmute */
 171         dev->stereo = fmr2_stereo_mode(port);
 172         return 0;
 173 }
 174
 175 /* !!! not tested, in my card this does't work !!! */
 176 static int fmr2_setvolume(struct fmr2_device *dev)
 177 {
 178         int i,a,n, port = dev->port;
 179
 180         if (dev->card_type != 11) return 1;
 181
 182         switch( (dev->curvol+(1<<11)) >> 12 )
 183         {
 184         case 0: case 1: n = 0x21; break;
 185         case 2: n = 0x84; break;
 186         case 3: n = 0x90; break;
 187         case 4: n = 0x104; break;
 188         case 5: n = 0x110; break;
 189         case 6: n = 0x204; break;
 190         case 7: n = 0x210; break;
 191         case 8: n = 0x402; break;
 192         case 9: n = 0x404; break;
 193         default:
 194         case 10: n = 0x408; break;
 195         case 11: n = 0x410; break;
 196         case 12: n = 0x801; break;
 197         case 13: n = 0x802; break;
 198         case 14: n = 0x804; break;
 199         case 15: n = 0x808; break;
 200         case 16: n = 0x810; break;
 201         }
 202         for(i=12;--i>=0;)
 203         {
 204                 a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */
 205                 outb(a|4, port);
 206                 wait(4,port);
 207                 outb(a|0x24, port);
 208                 wait(4,port);
 209                 outb(a|4, port);
 210                 wait(4,port);
 211         }
 212         for(i=6;--i>=0;)
 213         {
 214                 a = ((0x18 >> i) & 1) << 6;
 215                 outb(a|4, port);
 216                 wait(4,port);
 217                 outb(a|0x24, port);
 218                 wait(4,port);
 219                 outb(a|4, port);
 220                 wait(4,port);
 221         }
 222         wait(4,port);
 223         outb(0x14, port);
 224
 225         return 0;
 226 }
 227
 228 static int fmr2_do_ioctl(struct inode *inode, struct file *file,
 229                       unsigned int cmd, void *arg)
 230 {
 231         struct video_device *dev = video_devdata(file);
 232         struct fmr2_device *fmr2 = dev->priv;
 233         debug_print((KERN_DEBUG "freq %ld flags %d vol %d mute %d "
 234                 "stereo %d type %d\n",
 235                 fmr2->curfreq, fmr2->flags, fmr2->curvol, fmr2->mute,
 236                 fmr2->stereo, fmr2->card_type));
 237
 238         switch(cmd)
 239         {
 240                 case VIDIOC_QUERYCAP:
 241                 {
 242                         struct v4l2_capability *v = arg;
 243                         memset(v,0,sizeof(*v));
 244                         strlcpy(v->driver, "radio-sf16fmr2", sizeof (v->driver));
 245                         strlcpy(v->card, "SF16-FMR2 radio", sizeof (v->card));
 246                         sprintf(v->bus_info,"ISA");
 247                         v->version = RADIO_VERSION;
 248                         v->capabilities = V4L2_CAP_TUNER;
 249
 250                         return 0;
 251                 }
 252                 case VIDIOC_G_TUNER:
 253                 {
 254                         struct v4l2_tuner *v = arg;
 255                         int mult;
 256
 257                         if (v->index > 0)
 258                                 return -EINVAL;
 259
 260                         memset(v,0,sizeof(*v));
 261                         strcpy(v->name, "FM");
 262                         v->type = V4L2_TUNER_RADIO;
 263
 264                         mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
 265                         v->rangelow = RSF16_MINFREQ/mult;
 266                         v->rangehigh = RSF16_MAXFREQ/mult;
 267                         v->rxsubchans =V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
 268                         v->capability=fmr2->flags&V4L2_TUNER_CAP_LOW;
 269
 270                         v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO:
 271                                                     V4L2_TUNER_MODE_MONO;
 272                         mutex_lock(&lock);
 273                         v->signal = fmr2_getsigstr(fmr2);
 274                         mutex_unlock(&lock);
 275
 276                         return 0;
 277                 }
 278                 case VIDIOC_S_TUNER:
 279                 {
 280                         struct v4l2_tuner *v = arg;
 281
 282                         if (v->index > 0)
 283                                 return -EINVAL;
 284
 285                         return 0;
 286                 }
 287                 case VIDIOC_S_FREQUENCY:
 288                 {
 289                         struct v4l2_frequency *f = arg;
 290
 291                         if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
 292                                 f->frequency *= 1000;
 293                         if (f->frequency < RSF16_MINFREQ ||
 294                                         f->frequency > RSF16_MAXFREQ )
 295                                 return -EINVAL;
 296                         /*rounding in steps of 200 to match th freq
 297                           that will be used */
 298                         fmr2->curfreq = (f->frequency/200)*200;
 299
 300                         /* set card freq (if not muted) */
 301                         if (fmr2->curvol && !fmr2->mute)
 302                         {
 303                                 mutex_lock(&lock);
 304                                 fmr2_setfreq(fmr2);
 305                                 mutex_unlock(&lock);
 306                         }
 307
 308                         return 0;
 309                 }
 310                 case VIDIOC_G_FREQUENCY:
 311                 {
 312                         struct v4l2_frequency *f = arg;
 313
 314                         f->type = V4L2_TUNER_RADIO;
 315                         f->frequency = fmr2->curfreq;
 316                         if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
 317                                 f->frequency /= 1000;
 318
 319                         return 0;
 320                 }
 321                 case VIDIOC_QUERYCTRL:
 322                 {
 323                         struct v4l2_queryctrl *qc = arg;
 324                         int i;
 325
 326                         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 327                                 if ((fmr2->card_type != 11)
 328                                                 && V4L2_CID_AUDIO_VOLUME)
 329                                         radio_qctrl[i].step=65535;
 330                                 if (qc->id && qc->id == radio_qctrl[i].id) {
 331                                         memcpy(qc, &(radio_qctrl[i]),
 332                                                                 sizeof(*qc));
 333                                         return (0);
 334                                 }
 335                         }
 336                         return -EINVAL;
 337                 }
 338                 case VIDIOC_G_CTRL:
 339                 {
 340                         struct v4l2_control *ctrl= arg;
 341
 342                         switch (ctrl->id) {
 343                                 case V4L2_CID_AUDIO_MUTE:
 344                                         ctrl->value=fmr2->mute;
 345                                         return (0);
 346                                 case V4L2_CID_AUDIO_VOLUME:
 347                                         ctrl->value=fmr2->curvol;
 348                                         return (0);
 349                         }
 350                         return -EINVAL;
 351                 }
 352                 case VIDIOC_S_CTRL:
 353                 {
 354                         struct v4l2_control *ctrl= arg;
 355
 356                         switch (ctrl->id) {
 357                                 case V4L2_CID_AUDIO_MUTE:
 358                                         fmr2->mute=ctrl->value;
 359                                         if (fmr2->card_type != 11) {
 360                                                 if (!fmr2->mute) {
 361                                                         fmr2->curvol = 65535;
 362                                                 } else {
 363                                                         fmr2->curvol = 0;
 364                                                 }
 365                                         }
 366                                         break;
 367                                 case V4L2_CID_AUDIO_VOLUME:
 368                                         fmr2->curvol = ctrl->value;
 369                                         if (fmr2->card_type != 11) {
 370                                                 if (fmr2->curvol) {
 371                                                         fmr2->curvol = 65535;
 372                                                         fmr2->mute = 0;
 373                                                 } else {
 374                                                         fmr2->curvol = 0;
 375                                                         fmr2->mute = 1;
 376                                                 }
 377                                         }
 378                                         break;
 379                                 default:
 380                                         return -EINVAL;
 381                         }
 382 #ifdef DEBUG
 383                         if (fmr2->curvol && !fmr2->mute)
 384                                 printk(KERN_DEBUG "unmute\n");
 385                         else
 386                                 printk(KERN_DEBUG "mute\n");
 387 #endif
 388                         mutex_lock(&lock);
 389                         if (fmr2->curvol && !fmr2->mute) {
 390                                 fmr2_setvolume(fmr2);
 391                                 fmr2_setfreq(fmr2);
 392                         } else
 393                                 fmr2_mute(fmr2->port);
 394                         mutex_unlock(&lock);
 395                         return (0);
 396                 }
 397                 default:
 398                         return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 399                                                           az_do_ioctl);
 400
 401         }
 402 }
 403
 404 static int fmr2_ioctl(struct inode *inode, struct file *file,
 405                       unsigned int cmd, unsigned long arg)
 406  {
 407         return video_usercopy(inode, file, cmd, arg, fmr2_do_ioctl);
 408 }
 409
 410 static struct fmr2_device fmr2_unit;
 411
 412 static struct file_operations fmr2_fops = {
 413         .owner          = THIS_MODULE,
 414         .open           = video_exclusive_open,
 415         .release        = video_exclusive_release,
 416         .ioctl          = fmr2_ioctl,
 417         .compat_ioctl   = v4l_compat_ioctl32,
 418         .llseek         = no_llseek,
 419 };
 420
 421 static struct video_device fmr2_radio=
 422 {
 423         .owner          = THIS_MODULE,
 424         .name           = "SF16FMR2 radio",
 425         . type          = VID_TYPE_TUNER,
 426         .hardware       = 0,
 427         .fops           = &fmr2_fops,
 428 };
 429
 430 static int __init fmr2_init(void)
 431 {
 432         fmr2_unit.port = io;
 433         fmr2_unit.curvol = 0;
 434         fmr2_unit.mute = 0;
 435         fmr2_unit.curfreq = 0;
 436         fmr2_unit.stereo = 1;
 437         fmr2_unit.flags = V4L2_TUNER_CAP_LOW;
 438         fmr2_unit.card_type = 0;
 439         fmr2_radio.priv = &fmr2_unit;
 440
 441         mutex_init(&lock);
 442
 443         if (request_region(io, 2, "sf16fmr2"))
 444         {
 445                 printk(KERN_ERR "fmr2: port 0x%x already in use\n", io);
 446                 return -EBUSY;
 447         }
 448
 449         if(video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
 450         {
 451                 release_region(io, 2);
 452                 return -EINVAL;
 453         }
 454
 455         printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
 456         /* mute card - prevents noisy bootups */
 457         mutex_lock(&lock);
 458         fmr2_mute(io);
 459         fmr2_product_info(&fmr2_unit);
 460         mutex_unlock(&lock);
 461         debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type));
 462         return 0;
 463 }
 464
 465 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
 466 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
 467 MODULE_LICENSE("GPL");
 468
 469 module_param(io, int, 0);
 470 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
 471 module_param(radio_nr, int, 0);
 472
 473 static void __exit fmr2_cleanup_module(void)
 474 {
 475         video_unregister_device(&fmr2_radio);
 476         release_region(io,2);
 477 }
 478
 479 module_init(fmr2_init);
 480 module_exit(fmr2_cleanup_module);
 481
 482 #ifndef MODULE
 483
 484 static int __init fmr2_setup_io(char *str)
 485 {
 486         get_option(&str, &io);
 487         return 1;
 488 }
 489
 490 __setup("sf16fmr2=", fmr2_setup_io);
 491
 492 #endif