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 static struct mutex lock; 28 29 #include <linux/version.h> /* for KERNEL_VERSION MACRO */ 30 #define RADIO_VERSION KERNEL_VERSION(0,0,2) 31 32 static struct v4l2_queryctrl radio_qctrl[] = { 33 { 34 .id = V4L2_CID_AUDIO_MUTE, 35 .name = "Mute", 36 .minimum = 0, 37 .maximum = 1, 38 .default_value = 1, 39 .type = V4L2_CTRL_TYPE_BOOLEAN, 40 },{ 41 .id = V4L2_CID_AUDIO_VOLUME, 42 .name = "Volume", 43 .minimum = 0, 44 .maximum = 65535, 45 .step = 1<<12, 46 .default_value = 0xff, 47 .type = V4L2_CTRL_TYPE_INTEGER, 48 } 49 }; 50 51 #undef DEBUG 52 //#define DEBUG 1 53 54 #ifdef DEBUG 55 # define debug_print(s) printk s 56 #else 57 # define debug_print(s) 58 #endif 59 60 /* this should be static vars for module size */ 61 struct fmr2_device 62 { 63 int port; 64 int curvol; /* 0-65535, if not volume 0 or 65535 */ 65 int mute; 66 int stereo; /* card is producing stereo audio */ 67 unsigned long curfreq; /* freq in kHz */ 68 int card_type; 69 __u32 flags; 70 }; 71 72 static int io = 0x384; 73 static int radio_nr = -1; 74 75 /* hw precision is 12.5 kHz 76 * It is only useful to give freq in intervall of 200 (=0.0125Mhz), 77 * other bits will be truncated 78 */ 79 #define RSF16_ENCODE(x) ((x)/200+856) 80 #define RSF16_MINFREQ 87*16000 81 #define RSF16_MAXFREQ 108*16000 82 83 static inline void wait(int n,int port) 84 { 85 for (;n;--n) inb(port); 86 } 87 88 static void outbits(int bits, unsigned int data, int nWait, int port) 89 { 90 int bit; 91 for(;--bits>=0;) { 92 bit = (data>>bits) & 1; 93 outb(bit,port); 94 wait(nWait,port); 95 outb(bit|2,port); 96 wait(nWait,port); 97 outb(bit,port); 98 wait(nWait,port); 99 } 100 } 101 102 static inline void fmr2_mute(int port) 103 { 104 outb(0x00, port); 105 wait(4,port); 106 } 107 108 static inline void fmr2_unmute(int port) 109 { 110 outb(0x04, port); 111 wait(4,port); 112 } 113 114 static inline int fmr2_stereo_mode(int port) 115 { 116 int n = inb(port); 117 outb(6,port); 118 inb(port); 119 n = ((n>>3)&1)^1; 120 debug_print((KERN_DEBUG "stereo: %d\n", n)); 121 return n; 122 } 123 124 static int fmr2_product_info(struct fmr2_device *dev) 125 { 126 int n = inb(dev->port); 127 n &= 0xC1; 128 if (n == 0) 129 { 130 /* this should support volume set */ 131 dev->card_type = 12; 132 return 0; 133 } 134 /* not volume (mine is 11) */ 135 dev->card_type = (n==128)?11:0; 136 return n; 137 } 138 139 static inline int fmr2_getsigstr(struct fmr2_device *dev) 140 { 141 /* !!! work only if scanning freq */ 142 int port = dev->port, res = 0xffff; 143 outb(5,port); 144 wait(4,port); 145 if (!(inb(port)&1)) res = 0; 146 debug_print((KERN_DEBUG "signal: %d\n", res)); 147 return res; 148 } 149 150 /* set frequency and unmute card */ 151 static int fmr2_setfreq(struct fmr2_device *dev) 152 { 153 int port = dev->port; 154 unsigned long freq = dev->curfreq; 155 156 fmr2_mute(port); 157 158 /* 0x42 for mono output 159 * 0x102 forward scanning 160 * 0x182 scansione avanti 161 */ 162 outbits(9,0x2,3,port); 163 outbits(16,RSF16_ENCODE(freq),2,port); 164 165 fmr2_unmute(port); 166 167 /* wait 0.11 sec */ 168 msleep(110); 169 170 /* NOTE if mute this stop radio 171 you must set freq on unmute */ 172 dev->stereo = fmr2_stereo_mode(port); 173 return 0; 174 } 175 176 /* !!! not tested, in my card this does't work !!! */ 177 static int fmr2_setvolume(struct fmr2_device *dev) 178 { 179 int i,a,n, port = dev->port; 180 181 if (dev->card_type != 11) return 1; 182 183 switch( (dev->curvol+(1<<11)) >> 12 ) 184 { 185 case 0: case 1: n = 0x21; break; 186 case 2: n = 0x84; break; 187 case 3: n = 0x90; break; 188 case 4: n = 0x104; break; 189 case 5: n = 0x110; break; 190 case 6: n = 0x204; break; 191 case 7: n = 0x210; break; 192 case 8: n = 0x402; break; 193 case 9: n = 0x404; break; 194 default: 195 case 10: n = 0x408; break; 196 case 11: n = 0x410; break; 197 case 12: n = 0x801; break; 198 case 13: n = 0x802; break; 199 case 14: n = 0x804; break; 200 case 15: n = 0x808; break; 201 case 16: n = 0x810; break; 202 } 203 for(i=12;--i>=0;) 204 { 205 a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */ 206 outb(a|4, port); 207 wait(4,port); 208 outb(a|0x24, port); 209 wait(4,port); 210 outb(a|4, port); 211 wait(4,port); 212 } 213 for(i=6;--i>=0;) 214 { 215 a = ((0x18 >> i) & 1) << 6; 216 outb(a|4, port); 217 wait(4,port); 218 outb(a|0x24, port); 219 wait(4,port); 220 outb(a|4, port); 221 wait(4,port); 222 } 223 wait(4,port); 224 outb(0x14, port); 225 226 return 0; 227 } 228 229 static int fmr2_do_ioctl(struct inode *inode, struct file *file, 230 unsigned int cmd, void *arg) 231 { 232 struct video_device *dev = video_devdata(file); 233 struct fmr2_device *fmr2 = dev->priv; 234 debug_print((KERN_DEBUG "freq %ld flags %d vol %d mute %d " 235 "stereo %d type %d\n", 236 fmr2->curfreq, fmr2->flags, fmr2->curvol, fmr2->mute, 237 fmr2->stereo, fmr2->card_type)); 238 239 switch(cmd) 240 { 241 case VIDIOC_QUERYCAP: 242 { 243 struct v4l2_capability *v = arg; 244 memset(v,0,sizeof(*v)); 245 strlcpy(v->driver, "radio-sf16fmr2", sizeof (v->driver)); 246 strlcpy(v->card, "SF16-FMR2 radio", sizeof (v->card)); 247 sprintf(v->bus_info,"ISA"); 248 v->version = RADIO_VERSION; 249 v->capabilities = V4L2_CAP_TUNER; 250 251 return 0; 252 } 253 case VIDIOC_G_TUNER: 254 { 255 struct v4l2_tuner *v = arg; 256 int mult; 257 258 if (v->index > 0) 259 return -EINVAL; 260 261 memset(v,0,sizeof(*v)); 262 strcpy(v->name, "FM"); 263 v->type = V4L2_TUNER_RADIO; 264 265 mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000; 266 v->rangelow = RSF16_MINFREQ/mult; 267 v->rangehigh = RSF16_MAXFREQ/mult; 268 v->rxsubchans =V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO; 269 v->capability=fmr2->flags&V4L2_TUNER_CAP_LOW; 270 271 v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO: 272 V4L2_TUNER_MODE_MONO; 273 mutex_lock(&lock); 274 v->signal = fmr2_getsigstr(fmr2); 275 mutex_unlock(&lock); 276 277 return 0; 278 } 279 case VIDIOC_S_TUNER: 280 { 281 struct v4l2_tuner *v = arg; 282 283 if (v->index > 0) 284 return -EINVAL; 285 286 return 0; 287 } 288 case VIDIOC_S_FREQUENCY: 289 { 290 struct v4l2_frequency *f = arg; 291 292 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW)) 293 f->frequency *= 1000; 294 if (f->frequency < RSF16_MINFREQ || 295 f->frequency > RSF16_MAXFREQ ) 296 return -EINVAL; 297 /*rounding in steps of 200 to match th freq 298 that will be used */ 299 fmr2->curfreq = (f->frequency/200)*200; 300 301 /* set card freq (if not muted) */ 302 if (fmr2->curvol && !fmr2->mute) 303 { 304 mutex_lock(&lock); 305 fmr2_setfreq(fmr2); 306 mutex_unlock(&lock); 307 } 308 309 return 0; 310 } 311 case VIDIOC_G_FREQUENCY: 312 { 313 struct v4l2_frequency *f = arg; 314 315 f->type = V4L2_TUNER_RADIO; 316 f->frequency = fmr2->curfreq; 317 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW)) 318 f->frequency /= 1000; 319 320 return 0; 321 } 322 case VIDIOC_QUERYCTRL: 323 { 324 struct v4l2_queryctrl *qc = arg; 325 int i; 326 327 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { 328 if ((fmr2->card_type != 11) 329 && V4L2_CID_AUDIO_VOLUME) 330 radio_qctrl[i].step=65535; 331 if (qc->id && qc->id == radio_qctrl[i].id) { 332 memcpy(qc, &(radio_qctrl[i]), 333 sizeof(*qc)); 334 return (0); 335 } 336 } 337 return -EINVAL; 338 } 339 case VIDIOC_G_CTRL: 340 { 341 struct v4l2_control *ctrl= arg; 342 343 switch (ctrl->id) { 344 case V4L2_CID_AUDIO_MUTE: 345 ctrl->value=fmr2->mute; 346 return (0); 347 case V4L2_CID_AUDIO_VOLUME: 348 ctrl->value=fmr2->curvol; 349 return (0); 350 } 351 return -EINVAL; 352 } 353 case VIDIOC_S_CTRL: 354 { 355 struct v4l2_control *ctrl= arg; 356 357 switch (ctrl->id) { 358 case V4L2_CID_AUDIO_MUTE: 359 fmr2->mute=ctrl->value; 360 if (fmr2->card_type != 11) { 361 if (!fmr2->mute) { 362 fmr2->curvol = 65535; 363 } else { 364 fmr2->curvol = 0; 365 } 366 } 367 break; 368 case V4L2_CID_AUDIO_VOLUME: 369 fmr2->curvol = ctrl->value; 370 if (fmr2->card_type != 11) { 371 if (fmr2->curvol) { 372 fmr2->curvol = 65535; 373 fmr2->mute = 0; 374 } else { 375 fmr2->curvol = 0; 376 fmr2->mute = 1; 377 } 378 } 379 break; 380 default: 381 return -EINVAL; 382 } 383 #ifdef DEBUG 384 if (fmr2->curvol && !fmr2->mute) 385 printk(KERN_DEBUG "unmute\n"); 386 else 387 printk(KERN_DEBUG "mute\n"); 388 #endif 389 mutex_lock(&lock); 390 if (fmr2->curvol && !fmr2->mute) { 391 fmr2_setvolume(fmr2); 392 fmr2_setfreq(fmr2); 393 } else 394 fmr2_mute(fmr2->port); 395 mutex_unlock(&lock); 396 return (0); 397 } 398 default: 399 return v4l_compat_translate_ioctl(inode,file,cmd,arg, 400 fmr2_do_ioctl); 401 402 } 403 } 404 405 static int fmr2_ioctl(struct inode *inode, struct file *file, 406 unsigned int cmd, unsigned long arg) 407 { 408 return video_usercopy(inode, file, cmd, arg, fmr2_do_ioctl); 409 } 410 411 static struct fmr2_device fmr2_unit; 412 413 static const struct file_operations fmr2_fops = { 414 .owner = THIS_MODULE, 415 .open = video_exclusive_open, 416 .release = video_exclusive_release, 417 .ioctl = fmr2_ioctl, 418 .compat_ioctl = v4l_compat_ioctl32, 419 .llseek = no_llseek, 420 }; 421 422 static struct video_device fmr2_radio= 423 { 424 .owner = THIS_MODULE, 425 .name = "SF16FMR2 radio", 426 . type = VID_TYPE_TUNER, 427 .hardware = 0, 428 .fops = &fmr2_fops, 429 }; 430 431 static int __init fmr2_init(void) 432 { 433 fmr2_unit.port = io; 434 fmr2_unit.curvol = 0; 435 fmr2_unit.mute = 0; 436 fmr2_unit.curfreq = 0; 437 fmr2_unit.stereo = 1; 438 fmr2_unit.flags = V4L2_TUNER_CAP_LOW; 439 fmr2_unit.card_type = 0; 440 fmr2_radio.priv = &fmr2_unit; 441 442 mutex_init(&lock); 443 444 if (request_region(io, 2, "sf16fmr2")) 445 { 446 printk(KERN_ERR "fmr2: port 0x%x already in use\n", io); 447 return -EBUSY; 448 } 449 450 if(video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr)==-1) 451 { 452 release_region(io, 2); 453 return -EINVAL; 454 } 455 456 printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io); 457 /* mute card - prevents noisy bootups */ 458 mutex_lock(&lock); 459 fmr2_mute(io); 460 fmr2_product_info(&fmr2_unit); 461 mutex_unlock(&lock); 462 debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type)); 463 return 0; 464 } 465 466 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com"); 467 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio."); 468 MODULE_LICENSE("GPL"); 469 470 module_param(io, int, 0); 471 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)"); 472 module_param(radio_nr, int, 0); 473 474 static void __exit fmr2_cleanup_module(void) 475 { 476 video_unregister_device(&fmr2_radio); 477 release_region(io,2); 478 } 479 480 module_init(fmr2_init); 481 module_exit(fmr2_cleanup_module); 482 483 #ifndef MODULE 484 485 static int __init fmr2_setup_io(char *str) 486 { 487 get_option(&str, &io); 488 return 1; 489 } 490 491 __setup("sf16fmr2=", fmr2_setup_io); 492 493 #endif 494