1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, 4 * Hannu Savolainen 1993-1996, 5 * Rob Hooft 6 * 7 * Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips) 8 * 9 * Most if code is ported from OSS/Lite. 10 */ 11 12 #include <sound/opl3.h> 13 #include <linux/io.h> 14 #include <linux/delay.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/slab.h> 18 #include <linux/ioport.h> 19 #include <sound/minors.h> 20 #include "opl3_voice.h" 21 22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Hannu Savolainen 1993-1996, Rob Hooft"); 23 MODULE_DESCRIPTION("Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips)"); 24 MODULE_LICENSE("GPL"); 25 26 static void snd_opl2_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val) 27 { 28 unsigned long flags; 29 unsigned long port; 30 31 /* 32 * The original 2-OP synth requires a quite long delay 33 * after writing to a register. 34 */ 35 36 port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port; 37 38 spin_lock_irqsave(&opl3->reg_lock, flags); 39 40 outb((unsigned char) cmd, port); 41 udelay(10); 42 43 outb((unsigned char) val, port + 1); 44 udelay(30); 45 46 spin_unlock_irqrestore(&opl3->reg_lock, flags); 47 } 48 49 static void snd_opl3_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val) 50 { 51 unsigned long flags; 52 unsigned long port; 53 54 /* 55 * The OPL-3 survives with just two INBs 56 * after writing to a register. 57 */ 58 59 port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port; 60 61 spin_lock_irqsave(&opl3->reg_lock, flags); 62 63 outb((unsigned char) cmd, port); 64 inb(opl3->l_port); 65 inb(opl3->l_port); 66 67 outb((unsigned char) val, port + 1); 68 inb(opl3->l_port); 69 inb(opl3->l_port); 70 71 spin_unlock_irqrestore(&opl3->reg_lock, flags); 72 } 73 74 static int snd_opl3_detect(struct snd_opl3 * opl3) 75 { 76 /* 77 * This function returns 1 if the FM chip is present at the given I/O port 78 * The detection algorithm plays with the timer built in the FM chip and 79 * looks for a change in the status register. 80 * 81 * Note! The timers of the FM chip are not connected to AdLib (and compatible) 82 * boards. 83 * 84 * Note2! The chip is initialized if detected. 85 */ 86 87 unsigned char stat1, stat2, signature; 88 89 /* Reset timers 1 and 2 */ 90 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK); 91 /* Reset the IRQ of the FM chip */ 92 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET); 93 signature = stat1 = inb(opl3->l_port); /* Status register */ 94 if ((stat1 & 0xe0) != 0x00) { /* Should be 0x00 */ 95 snd_printd("OPL3: stat1 = 0x%x\n", stat1); 96 return -ENODEV; 97 } 98 /* Set timer1 to 0xff */ 99 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 0xff); 100 /* Unmask and start timer 1 */ 101 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER2_MASK | OPL3_TIMER1_START); 102 /* Now we have to delay at least 80us */ 103 udelay(200); 104 /* Read status after timers have expired */ 105 stat2 = inb(opl3->l_port); 106 /* Stop the timers */ 107 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK); 108 /* Reset the IRQ of the FM chip */ 109 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET); 110 if ((stat2 & 0xe0) != 0xc0) { /* There is no YM3812 */ 111 snd_printd("OPL3: stat2 = 0x%x\n", stat2); 112 return -ENODEV; 113 } 114 115 /* If the toplevel code knows exactly the type of chip, don't try 116 to detect it. */ 117 if (opl3->hardware != OPL3_HW_AUTO) 118 return 0; 119 120 /* There is a FM chip on this address. Detect the type (OPL2 to OPL4) */ 121 if (signature == 0x06) { /* OPL2 */ 122 opl3->hardware = OPL3_HW_OPL2; 123 } else { 124 /* 125 * If we had an OPL4 chip, opl3->hardware would have been set 126 * by the OPL4 driver; so we can assume OPL3 here. 127 */ 128 if (snd_BUG_ON(!opl3->r_port)) 129 return -ENODEV; 130 opl3->hardware = OPL3_HW_OPL3; 131 } 132 return 0; 133 } 134 135 /* 136 * AdLib timers 137 */ 138 139 /* 140 * Timer 1 - 80us 141 */ 142 143 static int snd_opl3_timer1_start(struct snd_timer * timer) 144 { 145 unsigned long flags; 146 unsigned char tmp; 147 unsigned int ticks; 148 struct snd_opl3 *opl3; 149 150 opl3 = snd_timer_chip(timer); 151 spin_lock_irqsave(&opl3->timer_lock, flags); 152 ticks = timer->sticks; 153 tmp = (opl3->timer_enable | OPL3_TIMER1_START) & ~OPL3_TIMER1_MASK; 154 opl3->timer_enable = tmp; 155 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 256 - ticks); /* timer 1 count */ 156 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */ 157 spin_unlock_irqrestore(&opl3->timer_lock, flags); 158 return 0; 159 } 160 161 static int snd_opl3_timer1_stop(struct snd_timer * timer) 162 { 163 unsigned long flags; 164 unsigned char tmp; 165 struct snd_opl3 *opl3; 166 167 opl3 = snd_timer_chip(timer); 168 spin_lock_irqsave(&opl3->timer_lock, flags); 169 tmp = (opl3->timer_enable | OPL3_TIMER1_MASK) & ~OPL3_TIMER1_START; 170 opl3->timer_enable = tmp; 171 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */ 172 spin_unlock_irqrestore(&opl3->timer_lock, flags); 173 return 0; 174 } 175 176 /* 177 * Timer 2 - 320us 178 */ 179 180 static int snd_opl3_timer2_start(struct snd_timer * timer) 181 { 182 unsigned long flags; 183 unsigned char tmp; 184 unsigned int ticks; 185 struct snd_opl3 *opl3; 186 187 opl3 = snd_timer_chip(timer); 188 spin_lock_irqsave(&opl3->timer_lock, flags); 189 ticks = timer->sticks; 190 tmp = (opl3->timer_enable | OPL3_TIMER2_START) & ~OPL3_TIMER2_MASK; 191 opl3->timer_enable = tmp; 192 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER2, 256 - ticks); /* timer 1 count */ 193 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */ 194 spin_unlock_irqrestore(&opl3->timer_lock, flags); 195 return 0; 196 } 197 198 static int snd_opl3_timer2_stop(struct snd_timer * timer) 199 { 200 unsigned long flags; 201 unsigned char tmp; 202 struct snd_opl3 *opl3; 203 204 opl3 = snd_timer_chip(timer); 205 spin_lock_irqsave(&opl3->timer_lock, flags); 206 tmp = (opl3->timer_enable | OPL3_TIMER2_MASK) & ~OPL3_TIMER2_START; 207 opl3->timer_enable = tmp; 208 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */ 209 spin_unlock_irqrestore(&opl3->timer_lock, flags); 210 return 0; 211 } 212 213 /* 214 215 */ 216 217 static struct snd_timer_hardware snd_opl3_timer1 = 218 { 219 .flags = SNDRV_TIMER_HW_STOP, 220 .resolution = 80000, 221 .ticks = 256, 222 .start = snd_opl3_timer1_start, 223 .stop = snd_opl3_timer1_stop, 224 }; 225 226 static struct snd_timer_hardware snd_opl3_timer2 = 227 { 228 .flags = SNDRV_TIMER_HW_STOP, 229 .resolution = 320000, 230 .ticks = 256, 231 .start = snd_opl3_timer2_start, 232 .stop = snd_opl3_timer2_stop, 233 }; 234 235 static int snd_opl3_timer1_init(struct snd_opl3 * opl3, int timer_no) 236 { 237 struct snd_timer *timer = NULL; 238 struct snd_timer_id tid; 239 int err; 240 241 tid.dev_class = SNDRV_TIMER_CLASS_CARD; 242 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 243 tid.card = opl3->card->number; 244 tid.device = timer_no; 245 tid.subdevice = 0; 246 if ((err = snd_timer_new(opl3->card, "AdLib timer #1", &tid, &timer)) >= 0) { 247 strcpy(timer->name, "AdLib timer #1"); 248 timer->private_data = opl3; 249 timer->hw = snd_opl3_timer1; 250 } 251 opl3->timer1 = timer; 252 return err; 253 } 254 255 static int snd_opl3_timer2_init(struct snd_opl3 * opl3, int timer_no) 256 { 257 struct snd_timer *timer = NULL; 258 struct snd_timer_id tid; 259 int err; 260 261 tid.dev_class = SNDRV_TIMER_CLASS_CARD; 262 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 263 tid.card = opl3->card->number; 264 tid.device = timer_no; 265 tid.subdevice = 0; 266 if ((err = snd_timer_new(opl3->card, "AdLib timer #2", &tid, &timer)) >= 0) { 267 strcpy(timer->name, "AdLib timer #2"); 268 timer->private_data = opl3; 269 timer->hw = snd_opl3_timer2; 270 } 271 opl3->timer2 = timer; 272 return err; 273 } 274 275 /* 276 277 */ 278 279 void snd_opl3_interrupt(struct snd_hwdep * hw) 280 { 281 unsigned char status; 282 struct snd_opl3 *opl3; 283 struct snd_timer *timer; 284 285 if (hw == NULL) 286 return; 287 288 opl3 = hw->private_data; 289 status = inb(opl3->l_port); 290 #if 0 291 snd_printk(KERN_DEBUG "AdLib IRQ status = 0x%x\n", status); 292 #endif 293 if (!(status & 0x80)) 294 return; 295 296 if (status & 0x40) { 297 timer = opl3->timer1; 298 snd_timer_interrupt(timer, timer->sticks); 299 } 300 if (status & 0x20) { 301 timer = opl3->timer2; 302 snd_timer_interrupt(timer, timer->sticks); 303 } 304 } 305 306 EXPORT_SYMBOL(snd_opl3_interrupt); 307 308 /* 309 310 */ 311 312 static int snd_opl3_free(struct snd_opl3 *opl3) 313 { 314 if (snd_BUG_ON(!opl3)) 315 return -ENXIO; 316 if (opl3->private_free) 317 opl3->private_free(opl3); 318 snd_opl3_clear_patches(opl3); 319 release_and_free_resource(opl3->res_l_port); 320 release_and_free_resource(opl3->res_r_port); 321 kfree(opl3); 322 return 0; 323 } 324 325 static int snd_opl3_dev_free(struct snd_device *device) 326 { 327 struct snd_opl3 *opl3 = device->device_data; 328 return snd_opl3_free(opl3); 329 } 330 331 int snd_opl3_new(struct snd_card *card, 332 unsigned short hardware, 333 struct snd_opl3 **ropl3) 334 { 335 static const struct snd_device_ops ops = { 336 .dev_free = snd_opl3_dev_free, 337 }; 338 struct snd_opl3 *opl3; 339 int err; 340 341 *ropl3 = NULL; 342 opl3 = kzalloc(sizeof(*opl3), GFP_KERNEL); 343 if (!opl3) 344 return -ENOMEM; 345 346 opl3->card = card; 347 opl3->hardware = hardware; 348 spin_lock_init(&opl3->reg_lock); 349 spin_lock_init(&opl3->timer_lock); 350 351 if ((err = snd_device_new(card, SNDRV_DEV_CODEC, opl3, &ops)) < 0) { 352 snd_opl3_free(opl3); 353 return err; 354 } 355 356 *ropl3 = opl3; 357 return 0; 358 } 359 360 EXPORT_SYMBOL(snd_opl3_new); 361 362 int snd_opl3_init(struct snd_opl3 *opl3) 363 { 364 if (! opl3->command) { 365 printk(KERN_ERR "snd_opl3_init: command not defined!\n"); 366 return -EINVAL; 367 } 368 369 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT); 370 /* Melodic mode */ 371 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); 372 373 switch (opl3->hardware & OPL3_HW_MASK) { 374 case OPL3_HW_OPL2: 375 opl3->max_voices = MAX_OPL2_VOICES; 376 break; 377 case OPL3_HW_OPL3: 378 case OPL3_HW_OPL4: 379 opl3->max_voices = MAX_OPL3_VOICES; 380 /* Enter OPL3 mode */ 381 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_MODE, OPL3_OPL3_ENABLE); 382 } 383 return 0; 384 } 385 386 EXPORT_SYMBOL(snd_opl3_init); 387 388 int snd_opl3_create(struct snd_card *card, 389 unsigned long l_port, 390 unsigned long r_port, 391 unsigned short hardware, 392 int integrated, 393 struct snd_opl3 ** ropl3) 394 { 395 struct snd_opl3 *opl3; 396 int err; 397 398 *ropl3 = NULL; 399 if ((err = snd_opl3_new(card, hardware, &opl3)) < 0) 400 return err; 401 if (! integrated) { 402 if ((opl3->res_l_port = request_region(l_port, 2, "OPL2/3 (left)")) == NULL) { 403 snd_printk(KERN_ERR "opl3: can't grab left port 0x%lx\n", l_port); 404 snd_device_free(card, opl3); 405 return -EBUSY; 406 } 407 if (r_port != 0 && 408 (opl3->res_r_port = request_region(r_port, 2, "OPL2/3 (right)")) == NULL) { 409 snd_printk(KERN_ERR "opl3: can't grab right port 0x%lx\n", r_port); 410 snd_device_free(card, opl3); 411 return -EBUSY; 412 } 413 } 414 opl3->l_port = l_port; 415 opl3->r_port = r_port; 416 417 switch (opl3->hardware) { 418 /* some hardware doesn't support timers */ 419 case OPL3_HW_OPL3_SV: 420 case OPL3_HW_OPL3_CS: 421 case OPL3_HW_OPL3_FM801: 422 opl3->command = &snd_opl3_command; 423 break; 424 default: 425 opl3->command = &snd_opl2_command; 426 if ((err = snd_opl3_detect(opl3)) < 0) { 427 snd_printd("OPL2/3 chip not detected at 0x%lx/0x%lx\n", 428 opl3->l_port, opl3->r_port); 429 snd_device_free(card, opl3); 430 return err; 431 } 432 /* detect routine returns correct hardware type */ 433 switch (opl3->hardware & OPL3_HW_MASK) { 434 case OPL3_HW_OPL3: 435 case OPL3_HW_OPL4: 436 opl3->command = &snd_opl3_command; 437 } 438 } 439 440 snd_opl3_init(opl3); 441 442 *ropl3 = opl3; 443 return 0; 444 } 445 446 EXPORT_SYMBOL(snd_opl3_create); 447 448 int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev) 449 { 450 int err; 451 452 if (timer1_dev >= 0) 453 if ((err = snd_opl3_timer1_init(opl3, timer1_dev)) < 0) 454 return err; 455 if (timer2_dev >= 0) { 456 if ((err = snd_opl3_timer2_init(opl3, timer2_dev)) < 0) { 457 snd_device_free(opl3->card, opl3->timer1); 458 opl3->timer1 = NULL; 459 return err; 460 } 461 } 462 return 0; 463 } 464 465 EXPORT_SYMBOL(snd_opl3_timer_new); 466 467 int snd_opl3_hwdep_new(struct snd_opl3 * opl3, 468 int device, int seq_device, 469 struct snd_hwdep ** rhwdep) 470 { 471 struct snd_hwdep *hw; 472 struct snd_card *card = opl3->card; 473 int err; 474 475 if (rhwdep) 476 *rhwdep = NULL; 477 478 /* create hardware dependent device (direct FM) */ 479 480 if ((err = snd_hwdep_new(card, "OPL2/OPL3", device, &hw)) < 0) { 481 snd_device_free(card, opl3); 482 return err; 483 } 484 hw->private_data = opl3; 485 hw->exclusive = 1; 486 #ifdef CONFIG_SND_OSSEMUL 487 if (device == 0) 488 hw->oss_type = SNDRV_OSS_DEVICE_TYPE_DMFM; 489 #endif 490 strcpy(hw->name, hw->id); 491 switch (opl3->hardware & OPL3_HW_MASK) { 492 case OPL3_HW_OPL2: 493 strcpy(hw->name, "OPL2 FM"); 494 hw->iface = SNDRV_HWDEP_IFACE_OPL2; 495 break; 496 case OPL3_HW_OPL3: 497 strcpy(hw->name, "OPL3 FM"); 498 hw->iface = SNDRV_HWDEP_IFACE_OPL3; 499 break; 500 case OPL3_HW_OPL4: 501 strcpy(hw->name, "OPL4 FM"); 502 hw->iface = SNDRV_HWDEP_IFACE_OPL4; 503 break; 504 } 505 506 /* operators - only ioctl */ 507 hw->ops.open = snd_opl3_open; 508 hw->ops.ioctl = snd_opl3_ioctl; 509 hw->ops.write = snd_opl3_write; 510 hw->ops.release = snd_opl3_release; 511 512 opl3->hwdep = hw; 513 opl3->seq_dev_num = seq_device; 514 #if IS_ENABLED(CONFIG_SND_SEQUENCER) 515 if (snd_seq_device_new(card, seq_device, SNDRV_SEQ_DEV_ID_OPL3, 516 sizeof(struct snd_opl3 *), &opl3->seq_dev) >= 0) { 517 strcpy(opl3->seq_dev->name, hw->name); 518 *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(opl3->seq_dev) = opl3; 519 } 520 #endif 521 if (rhwdep) 522 *rhwdep = hw; 523 return 0; 524 } 525 526 EXPORT_SYMBOL(snd_opl3_hwdep_new); 527