1 /* 2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, 3 * Hannu Savolainen 1993-1996, 4 * Rob Hooft 5 * 6 * Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips) 7 * 8 * Most if code is ported from OSS/Lite. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 26 #include <sound/opl3.h> 27 #include <asm/io.h> 28 #include <linux/delay.h> 29 #include <linux/module.h> 30 #include <linux/init.h> 31 #include <linux/slab.h> 32 #include <linux/ioport.h> 33 #include <sound/minors.h> 34 35 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Hannu Savolainen 1993-1996, Rob Hooft"); 36 MODULE_DESCRIPTION("Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips)"); 37 MODULE_LICENSE("GPL"); 38 39 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4]; 40 41 static void snd_opl2_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val) 42 { 43 unsigned long flags; 44 unsigned long port; 45 46 /* 47 * The original 2-OP synth requires a quite long delay 48 * after writing to a register. 49 */ 50 51 port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port; 52 53 spin_lock_irqsave(&opl3->reg_lock, flags); 54 55 outb((unsigned char) cmd, port); 56 udelay(10); 57 58 outb((unsigned char) val, port + 1); 59 udelay(30); 60 61 spin_unlock_irqrestore(&opl3->reg_lock, flags); 62 } 63 64 static void snd_opl3_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val) 65 { 66 unsigned long flags; 67 unsigned long port; 68 69 /* 70 * The OPL-3 survives with just two INBs 71 * after writing to a register. 72 */ 73 74 port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port; 75 76 spin_lock_irqsave(&opl3->reg_lock, flags); 77 78 outb((unsigned char) cmd, port); 79 inb(opl3->l_port); 80 inb(opl3->l_port); 81 82 outb((unsigned char) val, port + 1); 83 inb(opl3->l_port); 84 inb(opl3->l_port); 85 86 spin_unlock_irqrestore(&opl3->reg_lock, flags); 87 } 88 89 static int snd_opl3_detect(struct snd_opl3 * opl3) 90 { 91 /* 92 * This function returns 1 if the FM chip is present at the given I/O port 93 * The detection algorithm plays with the timer built in the FM chip and 94 * looks for a change in the status register. 95 * 96 * Note! The timers of the FM chip are not connected to AdLib (and compatible) 97 * boards. 98 * 99 * Note2! The chip is initialized if detected. 100 */ 101 102 unsigned char stat1, stat2, signature; 103 104 /* Reset timers 1 and 2 */ 105 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK); 106 /* Reset the IRQ of the FM chip */ 107 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET); 108 signature = stat1 = inb(opl3->l_port); /* Status register */ 109 if ((stat1 & 0xe0) != 0x00) { /* Should be 0x00 */ 110 snd_printd("OPL3: stat1 = 0x%x\n", stat1); 111 return -ENODEV; 112 } 113 /* Set timer1 to 0xff */ 114 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 0xff); 115 /* Unmask and start timer 1 */ 116 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER2_MASK | OPL3_TIMER1_START); 117 /* Now we have to delay at least 80us */ 118 udelay(200); 119 /* Read status after timers have expired */ 120 stat2 = inb(opl3->l_port); 121 /* Stop the timers */ 122 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK); 123 /* Reset the IRQ of the FM chip */ 124 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET); 125 if ((stat2 & 0xe0) != 0xc0) { /* There is no YM3812 */ 126 snd_printd("OPL3: stat2 = 0x%x\n", stat2); 127 return -ENODEV; 128 } 129 130 /* If the toplevel code knows exactly the type of chip, don't try 131 to detect it. */ 132 if (opl3->hardware != OPL3_HW_AUTO) 133 return 0; 134 135 /* There is a FM chip on this address. Detect the type (OPL2 to OPL4) */ 136 if (signature == 0x06) { /* OPL2 */ 137 opl3->hardware = OPL3_HW_OPL2; 138 } else { 139 /* 140 * If we had an OPL4 chip, opl3->hardware would have been set 141 * by the OPL4 driver; so we can assume OPL3 here. 142 */ 143 if (snd_BUG_ON(!opl3->r_port)) 144 return -ENODEV; 145 opl3->hardware = OPL3_HW_OPL3; 146 } 147 return 0; 148 } 149 150 /* 151 * AdLib timers 152 */ 153 154 /* 155 * Timer 1 - 80us 156 */ 157 158 static int snd_opl3_timer1_start(struct snd_timer * timer) 159 { 160 unsigned long flags; 161 unsigned char tmp; 162 unsigned int ticks; 163 struct snd_opl3 *opl3; 164 165 opl3 = snd_timer_chip(timer); 166 spin_lock_irqsave(&opl3->timer_lock, flags); 167 ticks = timer->sticks; 168 tmp = (opl3->timer_enable | OPL3_TIMER1_START) & ~OPL3_TIMER1_MASK; 169 opl3->timer_enable = tmp; 170 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 256 - ticks); /* timer 1 count */ 171 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */ 172 spin_unlock_irqrestore(&opl3->timer_lock, flags); 173 return 0; 174 } 175 176 static int snd_opl3_timer1_stop(struct snd_timer * timer) 177 { 178 unsigned long flags; 179 unsigned char tmp; 180 struct snd_opl3 *opl3; 181 182 opl3 = snd_timer_chip(timer); 183 spin_lock_irqsave(&opl3->timer_lock, flags); 184 tmp = (opl3->timer_enable | OPL3_TIMER1_MASK) & ~OPL3_TIMER1_START; 185 opl3->timer_enable = tmp; 186 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */ 187 spin_unlock_irqrestore(&opl3->timer_lock, flags); 188 return 0; 189 } 190 191 /* 192 * Timer 2 - 320us 193 */ 194 195 static int snd_opl3_timer2_start(struct snd_timer * timer) 196 { 197 unsigned long flags; 198 unsigned char tmp; 199 unsigned int ticks; 200 struct snd_opl3 *opl3; 201 202 opl3 = snd_timer_chip(timer); 203 spin_lock_irqsave(&opl3->timer_lock, flags); 204 ticks = timer->sticks; 205 tmp = (opl3->timer_enable | OPL3_TIMER2_START) & ~OPL3_TIMER2_MASK; 206 opl3->timer_enable = tmp; 207 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER2, 256 - ticks); /* timer 1 count */ 208 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */ 209 spin_unlock_irqrestore(&opl3->timer_lock, flags); 210 return 0; 211 } 212 213 static int snd_opl3_timer2_stop(struct snd_timer * timer) 214 { 215 unsigned long flags; 216 unsigned char tmp; 217 struct snd_opl3 *opl3; 218 219 opl3 = snd_timer_chip(timer); 220 spin_lock_irqsave(&opl3->timer_lock, flags); 221 tmp = (opl3->timer_enable | OPL3_TIMER2_MASK) & ~OPL3_TIMER2_START; 222 opl3->timer_enable = tmp; 223 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */ 224 spin_unlock_irqrestore(&opl3->timer_lock, flags); 225 return 0; 226 } 227 228 /* 229 230 */ 231 232 static struct snd_timer_hardware snd_opl3_timer1 = 233 { 234 .flags = SNDRV_TIMER_HW_STOP, 235 .resolution = 80000, 236 .ticks = 256, 237 .start = snd_opl3_timer1_start, 238 .stop = snd_opl3_timer1_stop, 239 }; 240 241 static struct snd_timer_hardware snd_opl3_timer2 = 242 { 243 .flags = SNDRV_TIMER_HW_STOP, 244 .resolution = 320000, 245 .ticks = 256, 246 .start = snd_opl3_timer2_start, 247 .stop = snd_opl3_timer2_stop, 248 }; 249 250 static int snd_opl3_timer1_init(struct snd_opl3 * opl3, int timer_no) 251 { 252 struct snd_timer *timer = NULL; 253 struct snd_timer_id tid; 254 int err; 255 256 tid.dev_class = SNDRV_TIMER_CLASS_CARD; 257 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 258 tid.card = opl3->card->number; 259 tid.device = timer_no; 260 tid.subdevice = 0; 261 if ((err = snd_timer_new(opl3->card, "AdLib timer #1", &tid, &timer)) >= 0) { 262 strcpy(timer->name, "AdLib timer #1"); 263 timer->private_data = opl3; 264 timer->hw = snd_opl3_timer1; 265 } 266 opl3->timer1 = timer; 267 return err; 268 } 269 270 static int snd_opl3_timer2_init(struct snd_opl3 * opl3, int timer_no) 271 { 272 struct snd_timer *timer = NULL; 273 struct snd_timer_id tid; 274 int err; 275 276 tid.dev_class = SNDRV_TIMER_CLASS_CARD; 277 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 278 tid.card = opl3->card->number; 279 tid.device = timer_no; 280 tid.subdevice = 0; 281 if ((err = snd_timer_new(opl3->card, "AdLib timer #2", &tid, &timer)) >= 0) { 282 strcpy(timer->name, "AdLib timer #2"); 283 timer->private_data = opl3; 284 timer->hw = snd_opl3_timer2; 285 } 286 opl3->timer2 = timer; 287 return err; 288 } 289 290 /* 291 292 */ 293 294 void snd_opl3_interrupt(struct snd_hwdep * hw) 295 { 296 unsigned char status; 297 struct snd_opl3 *opl3; 298 struct snd_timer *timer; 299 300 if (hw == NULL) 301 return; 302 303 opl3 = hw->private_data; 304 status = inb(opl3->l_port); 305 #if 0 306 snd_printk(KERN_DEBUG "AdLib IRQ status = 0x%x\n", status); 307 #endif 308 if (!(status & 0x80)) 309 return; 310 311 if (status & 0x40) { 312 timer = opl3->timer1; 313 snd_timer_interrupt(timer, timer->sticks); 314 } 315 if (status & 0x20) { 316 timer = opl3->timer2; 317 snd_timer_interrupt(timer, timer->sticks); 318 } 319 } 320 321 EXPORT_SYMBOL(snd_opl3_interrupt); 322 323 /* 324 325 */ 326 327 static int snd_opl3_free(struct snd_opl3 *opl3) 328 { 329 if (snd_BUG_ON(!opl3)) 330 return -ENXIO; 331 if (opl3->private_free) 332 opl3->private_free(opl3); 333 snd_opl3_clear_patches(opl3); 334 release_and_free_resource(opl3->res_l_port); 335 release_and_free_resource(opl3->res_r_port); 336 kfree(opl3); 337 return 0; 338 } 339 340 static int snd_opl3_dev_free(struct snd_device *device) 341 { 342 struct snd_opl3 *opl3 = device->device_data; 343 return snd_opl3_free(opl3); 344 } 345 346 int snd_opl3_new(struct snd_card *card, 347 unsigned short hardware, 348 struct snd_opl3 **ropl3) 349 { 350 static struct snd_device_ops ops = { 351 .dev_free = snd_opl3_dev_free, 352 }; 353 struct snd_opl3 *opl3; 354 int err; 355 356 *ropl3 = NULL; 357 opl3 = kzalloc(sizeof(*opl3), GFP_KERNEL); 358 if (opl3 == NULL) { 359 snd_printk(KERN_ERR "opl3: cannot allocate\n"); 360 return -ENOMEM; 361 } 362 363 opl3->card = card; 364 opl3->hardware = hardware; 365 spin_lock_init(&opl3->reg_lock); 366 spin_lock_init(&opl3->timer_lock); 367 368 if ((err = snd_device_new(card, SNDRV_DEV_CODEC, opl3, &ops)) < 0) { 369 snd_opl3_free(opl3); 370 return err; 371 } 372 373 *ropl3 = opl3; 374 return 0; 375 } 376 377 EXPORT_SYMBOL(snd_opl3_new); 378 379 int snd_opl3_init(struct snd_opl3 *opl3) 380 { 381 if (! opl3->command) { 382 printk(KERN_ERR "snd_opl3_init: command not defined!\n"); 383 return -EINVAL; 384 } 385 386 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT); 387 /* Melodic mode */ 388 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); 389 390 switch (opl3->hardware & OPL3_HW_MASK) { 391 case OPL3_HW_OPL2: 392 opl3->max_voices = MAX_OPL2_VOICES; 393 break; 394 case OPL3_HW_OPL3: 395 case OPL3_HW_OPL4: 396 opl3->max_voices = MAX_OPL3_VOICES; 397 /* Enter OPL3 mode */ 398 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_MODE, OPL3_OPL3_ENABLE); 399 } 400 return 0; 401 } 402 403 EXPORT_SYMBOL(snd_opl3_init); 404 405 int snd_opl3_create(struct snd_card *card, 406 unsigned long l_port, 407 unsigned long r_port, 408 unsigned short hardware, 409 int integrated, 410 struct snd_opl3 ** ropl3) 411 { 412 struct snd_opl3 *opl3; 413 int err; 414 415 *ropl3 = NULL; 416 if ((err = snd_opl3_new(card, hardware, &opl3)) < 0) 417 return err; 418 if (! integrated) { 419 if ((opl3->res_l_port = request_region(l_port, 2, "OPL2/3 (left)")) == NULL) { 420 snd_printk(KERN_ERR "opl3: can't grab left port 0x%lx\n", l_port); 421 snd_device_free(card, opl3); 422 return -EBUSY; 423 } 424 if (r_port != 0 && 425 (opl3->res_r_port = request_region(r_port, 2, "OPL2/3 (right)")) == NULL) { 426 snd_printk(KERN_ERR "opl3: can't grab right port 0x%lx\n", r_port); 427 snd_device_free(card, opl3); 428 return -EBUSY; 429 } 430 } 431 opl3->l_port = l_port; 432 opl3->r_port = r_port; 433 434 switch (opl3->hardware) { 435 /* some hardware doesn't support timers */ 436 case OPL3_HW_OPL3_SV: 437 case OPL3_HW_OPL3_CS: 438 case OPL3_HW_OPL3_FM801: 439 opl3->command = &snd_opl3_command; 440 break; 441 default: 442 opl3->command = &snd_opl2_command; 443 if ((err = snd_opl3_detect(opl3)) < 0) { 444 snd_printd("OPL2/3 chip not detected at 0x%lx/0x%lx\n", 445 opl3->l_port, opl3->r_port); 446 snd_device_free(card, opl3); 447 return err; 448 } 449 /* detect routine returns correct hardware type */ 450 switch (opl3->hardware & OPL3_HW_MASK) { 451 case OPL3_HW_OPL3: 452 case OPL3_HW_OPL4: 453 opl3->command = &snd_opl3_command; 454 } 455 } 456 457 snd_opl3_init(opl3); 458 459 *ropl3 = opl3; 460 return 0; 461 } 462 463 EXPORT_SYMBOL(snd_opl3_create); 464 465 int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev) 466 { 467 int err; 468 469 if (timer1_dev >= 0) 470 if ((err = snd_opl3_timer1_init(opl3, timer1_dev)) < 0) 471 return err; 472 if (timer2_dev >= 0) { 473 if ((err = snd_opl3_timer2_init(opl3, timer2_dev)) < 0) { 474 snd_device_free(opl3->card, opl3->timer1); 475 opl3->timer1 = NULL; 476 return err; 477 } 478 } 479 return 0; 480 } 481 482 EXPORT_SYMBOL(snd_opl3_timer_new); 483 484 int snd_opl3_hwdep_new(struct snd_opl3 * opl3, 485 int device, int seq_device, 486 struct snd_hwdep ** rhwdep) 487 { 488 struct snd_hwdep *hw; 489 struct snd_card *card = opl3->card; 490 int err; 491 492 if (rhwdep) 493 *rhwdep = NULL; 494 495 /* create hardware dependent device (direct FM) */ 496 497 if ((err = snd_hwdep_new(card, "OPL2/OPL3", device, &hw)) < 0) { 498 snd_device_free(card, opl3); 499 return err; 500 } 501 hw->private_data = opl3; 502 hw->exclusive = 1; 503 #ifdef CONFIG_SND_OSSEMUL 504 if (device == 0) { 505 hw->oss_type = SNDRV_OSS_DEVICE_TYPE_DMFM; 506 sprintf(hw->oss_dev, "dmfm%i", card->number); 507 } 508 #endif 509 strcpy(hw->name, hw->id); 510 switch (opl3->hardware & OPL3_HW_MASK) { 511 case OPL3_HW_OPL2: 512 strcpy(hw->name, "OPL2 FM"); 513 hw->iface = SNDRV_HWDEP_IFACE_OPL2; 514 break; 515 case OPL3_HW_OPL3: 516 strcpy(hw->name, "OPL3 FM"); 517 hw->iface = SNDRV_HWDEP_IFACE_OPL3; 518 break; 519 case OPL3_HW_OPL4: 520 strcpy(hw->name, "OPL4 FM"); 521 hw->iface = SNDRV_HWDEP_IFACE_OPL4; 522 break; 523 } 524 525 /* operators - only ioctl */ 526 hw->ops.open = snd_opl3_open; 527 hw->ops.ioctl = snd_opl3_ioctl; 528 hw->ops.write = snd_opl3_write; 529 hw->ops.release = snd_opl3_release; 530 531 opl3->hwdep = hw; 532 opl3->seq_dev_num = seq_device; 533 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) 534 if (snd_seq_device_new(card, seq_device, SNDRV_SEQ_DEV_ID_OPL3, 535 sizeof(struct snd_opl3 *), &opl3->seq_dev) >= 0) { 536 strcpy(opl3->seq_dev->name, hw->name); 537 *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(opl3->seq_dev) = opl3; 538 } 539 #endif 540 if (rhwdep) 541 *rhwdep = hw; 542 return 0; 543 } 544 545 EXPORT_SYMBOL(snd_opl3_hwdep_new); 546 547 /* 548 * INIT part 549 */ 550 551 static int __init alsa_opl3_init(void) 552 { 553 return 0; 554 } 555 556 static void __exit alsa_opl3_exit(void) 557 { 558 } 559 560 module_init(alsa_opl3_init) 561 module_exit(alsa_opl3_exit) 562