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 <media/v4l2-ioctl.h> 26 #include <linux/mutex.h> 27 28 static struct mutex lock; 29 30 #include <linux/version.h> /* for KERNEL_VERSION MACRO */ 31 #define RADIO_VERSION KERNEL_VERSION(0,0,2) 32 33 #define AUD_VOL_INDEX 1 34 35 static struct v4l2_queryctrl radio_qctrl[] = { 36 { 37 .id = V4L2_CID_AUDIO_MUTE, 38 .name = "Mute", 39 .minimum = 0, 40 .maximum = 1, 41 .default_value = 1, 42 .type = V4L2_CTRL_TYPE_BOOLEAN, 43 }, 44 [AUD_VOL_INDEX] = { 45 .id = V4L2_CID_AUDIO_VOLUME, 46 .name = "Volume", 47 .minimum = 0, 48 .maximum = 15, 49 .step = 1, 50 .default_value = 0, 51 .type = V4L2_CTRL_TYPE_INTEGER, 52 } 53 }; 54 55 #undef DEBUG 56 //#define DEBUG 1 57 58 #ifdef DEBUG 59 # define debug_print(s) printk s 60 #else 61 # define debug_print(s) 62 #endif 63 64 /* this should be static vars for module size */ 65 struct fmr2_device 66 { 67 int port; 68 int curvol; /* 0-15 */ 69 int mute; 70 int stereo; /* card is producing stereo audio */ 71 unsigned long curfreq; /* freq in kHz */ 72 int card_type; 73 __u32 flags; 74 }; 75 76 static int io = 0x384; 77 static int radio_nr = -1; 78 79 /* hw precision is 12.5 kHz 80 * It is only useful to give freq in intervall of 200 (=0.0125Mhz), 81 * other bits will be truncated 82 */ 83 #define RSF16_ENCODE(x) ((x)/200+856) 84 #define RSF16_MINFREQ 87*16000 85 #define RSF16_MAXFREQ 108*16000 86 87 static inline void wait(int n,int port) 88 { 89 for (;n;--n) inb(port); 90 } 91 92 static void outbits(int bits, unsigned int data, int nWait, int port) 93 { 94 int bit; 95 for(;--bits>=0;) { 96 bit = (data>>bits) & 1; 97 outb(bit,port); 98 wait(nWait,port); 99 outb(bit|2,port); 100 wait(nWait,port); 101 outb(bit,port); 102 wait(nWait,port); 103 } 104 } 105 106 static inline void fmr2_mute(int port) 107 { 108 outb(0x00, port); 109 wait(4,port); 110 } 111 112 static inline void fmr2_unmute(int port) 113 { 114 outb(0x04, port); 115 wait(4,port); 116 } 117 118 static inline int fmr2_stereo_mode(int port) 119 { 120 int n = inb(port); 121 outb(6,port); 122 inb(port); 123 n = ((n>>3)&1)^1; 124 debug_print((KERN_DEBUG "stereo: %d\n", n)); 125 return n; 126 } 127 128 static int fmr2_product_info(struct fmr2_device *dev) 129 { 130 int n = inb(dev->port); 131 n &= 0xC1; 132 if (n == 0) 133 { 134 /* this should support volume set */ 135 dev->card_type = 12; 136 return 0; 137 } 138 /* not volume (mine is 11) */ 139 dev->card_type = (n==128)?11:0; 140 return n; 141 } 142 143 static inline int fmr2_getsigstr(struct fmr2_device *dev) 144 { 145 /* !!! work only if scanning freq */ 146 int port = dev->port, res = 0xffff; 147 outb(5,port); 148 wait(4,port); 149 if (!(inb(port)&1)) res = 0; 150 debug_print((KERN_DEBUG "signal: %d\n", res)); 151 return res; 152 } 153 154 /* set frequency and unmute card */ 155 static int fmr2_setfreq(struct fmr2_device *dev) 156 { 157 int port = dev->port; 158 unsigned long freq = dev->curfreq; 159 160 fmr2_mute(port); 161 162 /* 0x42 for mono output 163 * 0x102 forward scanning 164 * 0x182 scansione avanti 165 */ 166 outbits(9,0x2,3,port); 167 outbits(16,RSF16_ENCODE(freq),2,port); 168 169 fmr2_unmute(port); 170 171 /* wait 0.11 sec */ 172 msleep(110); 173 174 /* NOTE if mute this stop radio 175 you must set freq on unmute */ 176 dev->stereo = fmr2_stereo_mode(port); 177 return 0; 178 } 179 180 /* !!! not tested, in my card this does't work !!! */ 181 static int fmr2_setvolume(struct fmr2_device *dev) 182 { 183 int vol[16] = { 0x021, 0x084, 0x090, 0x104, 184 0x110, 0x204, 0x210, 0x402, 185 0x404, 0x408, 0x410, 0x801, 186 0x802, 0x804, 0x808, 0x810 }; 187 int i, a, port = dev->port; 188 int n = vol[dev->curvol & 0x0f]; 189 190 if (dev->card_type != 11) 191 return 1; 192 193 for (i = 12; --i >= 0; ) { 194 a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */ 195 outb(a | 4, port); 196 wait(4, port); 197 outb(a | 0x24, port); 198 wait(4, port); 199 outb(a | 4, port); 200 wait(4, port); 201 } 202 for (i = 6; --i >= 0; ) { 203 a = ((0x18 >> i) & 1) << 6; 204 outb(a | 4, port); 205 wait(4,port); 206 outb(a | 0x24, port); 207 wait(4,port); 208 outb(a|4, port); 209 wait(4,port); 210 } 211 wait(4, port); 212 outb(0x14, port); 213 214 return 0; 215 } 216 217 static int vidioc_querycap(struct file *file, void *priv, 218 struct v4l2_capability *v) 219 { 220 strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver)); 221 strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card)); 222 sprintf(v->bus_info, "ISA"); 223 v->version = RADIO_VERSION; 224 v->capabilities = V4L2_CAP_TUNER; 225 return 0; 226 } 227 228 static int vidioc_g_tuner(struct file *file, void *priv, 229 struct v4l2_tuner *v) 230 { 231 int mult; 232 struct video_device *dev = video_devdata(file); 233 struct fmr2_device *fmr2 = dev->priv; 234 235 if (v->index > 0) 236 return -EINVAL; 237 238 strcpy(v->name, "FM"); 239 v->type = V4L2_TUNER_RADIO; 240 241 mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000; 242 v->rangelow = RSF16_MINFREQ/mult; 243 v->rangehigh = RSF16_MAXFREQ/mult; 244 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO; 245 v->capability = fmr2->flags&V4L2_TUNER_CAP_LOW; 246 v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO: 247 V4L2_TUNER_MODE_MONO; 248 mutex_lock(&lock); 249 v->signal = fmr2_getsigstr(fmr2); 250 mutex_unlock(&lock); 251 return 0; 252 } 253 254 static int vidioc_s_tuner(struct file *file, void *priv, 255 struct v4l2_tuner *v) 256 { 257 if (v->index > 0) 258 return -EINVAL; 259 return 0; 260 } 261 262 static int vidioc_s_frequency(struct file *file, void *priv, 263 struct v4l2_frequency *f) 264 { 265 struct video_device *dev = video_devdata(file); 266 struct fmr2_device *fmr2 = dev->priv; 267 268 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW)) 269 f->frequency *= 1000; 270 if (f->frequency < RSF16_MINFREQ || 271 f->frequency > RSF16_MAXFREQ ) 272 return -EINVAL; 273 /*rounding in steps of 200 to match th freq 274 that will be used */ 275 fmr2->curfreq = (f->frequency/200)*200; 276 277 /* set card freq (if not muted) */ 278 if (fmr2->curvol && !fmr2->mute) { 279 mutex_lock(&lock); 280 fmr2_setfreq(fmr2); 281 mutex_unlock(&lock); 282 } 283 return 0; 284 } 285 286 static int vidioc_g_frequency(struct file *file, void *priv, 287 struct v4l2_frequency *f) 288 { 289 struct video_device *dev = video_devdata(file); 290 struct fmr2_device *fmr2 = dev->priv; 291 292 f->type = V4L2_TUNER_RADIO; 293 f->frequency = fmr2->curfreq; 294 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW)) 295 f->frequency /= 1000; 296 return 0; 297 } 298 299 static int vidioc_queryctrl(struct file *file, void *priv, 300 struct v4l2_queryctrl *qc) 301 { 302 int i; 303 304 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { 305 if (qc->id && qc->id == radio_qctrl[i].id) { 306 memcpy(qc, &radio_qctrl[i], sizeof(*qc)); 307 return 0; 308 } 309 } 310 return -EINVAL; 311 } 312 313 static int vidioc_g_ctrl(struct file *file, void *priv, 314 struct v4l2_control *ctrl) 315 { 316 struct video_device *dev = video_devdata(file); 317 struct fmr2_device *fmr2 = dev->priv; 318 319 switch (ctrl->id) { 320 case V4L2_CID_AUDIO_MUTE: 321 ctrl->value = fmr2->mute; 322 return 0; 323 case V4L2_CID_AUDIO_VOLUME: 324 ctrl->value = fmr2->curvol; 325 return 0; 326 } 327 return -EINVAL; 328 } 329 330 static int vidioc_s_ctrl(struct file *file, void *priv, 331 struct v4l2_control *ctrl) 332 { 333 struct video_device *dev = video_devdata(file); 334 struct fmr2_device *fmr2 = dev->priv; 335 336 switch (ctrl->id) { 337 case V4L2_CID_AUDIO_MUTE: 338 fmr2->mute = ctrl->value; 339 break; 340 case V4L2_CID_AUDIO_VOLUME: 341 if (ctrl->value > radio_qctrl[AUD_VOL_INDEX].maximum) 342 fmr2->curvol = radio_qctrl[AUD_VOL_INDEX].maximum; 343 else 344 fmr2->curvol = ctrl->value; 345 346 break; 347 default: 348 return -EINVAL; 349 } 350 351 #ifdef DEBUG 352 if (fmr2->curvol && !fmr2->mute) 353 printk(KERN_DEBUG "unmute\n"); 354 else 355 printk(KERN_DEBUG "mute\n"); 356 #endif 357 358 mutex_lock(&lock); 359 if (fmr2->curvol && !fmr2->mute) { 360 fmr2_setvolume(fmr2); 361 /* Set frequency and unmute card */ 362 fmr2_setfreq(fmr2); 363 } else 364 fmr2_mute(fmr2->port); 365 mutex_unlock(&lock); 366 return 0; 367 } 368 369 static int vidioc_g_audio(struct file *file, void *priv, 370 struct v4l2_audio *a) 371 { 372 if (a->index > 1) 373 return -EINVAL; 374 375 strcpy(a->name, "Radio"); 376 a->capability = V4L2_AUDCAP_STEREO; 377 return 0; 378 } 379 380 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 381 { 382 *i = 0; 383 return 0; 384 } 385 386 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 387 { 388 if (i != 0) 389 return -EINVAL; 390 return 0; 391 } 392 393 static int vidioc_s_audio(struct file *file, void *priv, 394 struct v4l2_audio *a) 395 { 396 if (a->index != 0) 397 return -EINVAL; 398 return 0; 399 } 400 401 static struct fmr2_device fmr2_unit; 402 403 static const struct file_operations fmr2_fops = { 404 .owner = THIS_MODULE, 405 .open = video_exclusive_open, 406 .release = video_exclusive_release, 407 .ioctl = video_ioctl2, 408 #ifdef CONFIG_COMPAT 409 .compat_ioctl = v4l_compat_ioctl32, 410 #endif 411 .llseek = no_llseek, 412 }; 413 414 static const struct v4l2_ioctl_ops fmr2_ioctl_ops = { 415 .vidioc_querycap = vidioc_querycap, 416 .vidioc_g_tuner = vidioc_g_tuner, 417 .vidioc_s_tuner = vidioc_s_tuner, 418 .vidioc_g_audio = vidioc_g_audio, 419 .vidioc_s_audio = vidioc_s_audio, 420 .vidioc_g_input = vidioc_g_input, 421 .vidioc_s_input = vidioc_s_input, 422 .vidioc_g_frequency = vidioc_g_frequency, 423 .vidioc_s_frequency = vidioc_s_frequency, 424 .vidioc_queryctrl = vidioc_queryctrl, 425 .vidioc_g_ctrl = vidioc_g_ctrl, 426 .vidioc_s_ctrl = vidioc_s_ctrl, 427 }; 428 429 static struct video_device fmr2_radio = { 430 .name = "SF16FMR2 radio", 431 .fops = &fmr2_fops, 432 .ioctl_ops = &fmr2_ioctl_ops, 433 }; 434 435 static int __init fmr2_init(void) 436 { 437 fmr2_unit.port = io; 438 fmr2_unit.curvol = 0; 439 fmr2_unit.mute = 0; 440 fmr2_unit.curfreq = 0; 441 fmr2_unit.stereo = 1; 442 fmr2_unit.flags = V4L2_TUNER_CAP_LOW; 443 fmr2_unit.card_type = 0; 444 fmr2_radio.priv = &fmr2_unit; 445 446 mutex_init(&lock); 447 448 if (!request_region(io, 2, "sf16fmr2")) { 449 printk(KERN_ERR "radio-sf16fmr2: request_region failed!\n"); 450 return -EBUSY; 451 } 452 453 if (video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr) < 0) { 454 release_region(io, 2); 455 return -EINVAL; 456 } 457 458 printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io); 459 /* mute card - prevents noisy bootups */ 460 mutex_lock(&lock); 461 fmr2_mute(io); 462 fmr2_product_info(&fmr2_unit); 463 mutex_unlock(&lock); 464 debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type)); 465 466 /* Only card_type == 11 implements volume */ 467 if (fmr2_unit.card_type != 11) 468 radio_qctrl[AUD_VOL_INDEX].maximum = 1; 469 470 return 0; 471 } 472 473 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com"); 474 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio."); 475 MODULE_LICENSE("GPL"); 476 477 module_param(io, int, 0); 478 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)"); 479 module_param(radio_nr, int, 0); 480 481 static void __exit fmr2_cleanup_module(void) 482 { 483 video_unregister_device(&fmr2_radio); 484 release_region(io,2); 485 } 486 487 module_init(fmr2_init); 488 module_exit(fmr2_cleanup_module); 489 490 #ifndef MODULE 491 492 static int __init fmr2_setup_io(char *str) 493 { 494 get_option(&str, &io); 495 return 1; 496 } 497 498 __setup("sf16fmr2=", fmr2_setup_io); 499 500 #endif 501