sound/drivers/opl3/opl3_lib.c

   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 <linux/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)
 359                 return -ENOMEM;
 360
 361         opl3->card = card;
 362         opl3->hardware = hardware;
 363         spin_lock_init(&opl3->reg_lock);
 364         spin_lock_init(&opl3->timer_lock);
 365
 366         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, opl3, &ops)) < 0) {
 367                 snd_opl3_free(opl3);
 368                 return err;
 369         }
 370
 371         *ropl3 = opl3;
 372         return 0;
 373 }
 374
 375 EXPORT_SYMBOL(snd_opl3_new);
 376
 377 int snd_opl3_init(struct snd_opl3 *opl3)
 378 {
 379         if (! opl3->command) {
 380                 printk(KERN_ERR "snd_opl3_init: command not defined!\n");
 381                 return -EINVAL;
 382         }
 383
 384         opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
 385         /* Melodic mode */
 386         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);
 387
 388         switch (opl3->hardware & OPL3_HW_MASK) {
 389         case OPL3_HW_OPL2:
 390                 opl3->max_voices = MAX_OPL2_VOICES;
 391                 break;
 392         case OPL3_HW_OPL3:
 393         case OPL3_HW_OPL4:
 394                 opl3->max_voices = MAX_OPL3_VOICES;
 395                 /* Enter OPL3 mode */
 396                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_MODE, OPL3_OPL3_ENABLE);
 397         }
 398         return 0;
 399 }
 400
 401 EXPORT_SYMBOL(snd_opl3_init);
 402
 403 int snd_opl3_create(struct snd_card *card,
 404                     unsigned long l_port,
 405                     unsigned long r_port,
 406                     unsigned short hardware,
 407                     int integrated,
 408                     struct snd_opl3 ** ropl3)
 409 {
 410         struct snd_opl3 *opl3;
 411         int err;
 412
 413         *ropl3 = NULL;
 414         if ((err = snd_opl3_new(card, hardware, &opl3)) < 0)
 415                 return err;
 416         if (! integrated) {
 417                 if ((opl3->res_l_port = request_region(l_port, 2, "OPL2/3 (left)")) == NULL) {
 418                         snd_printk(KERN_ERR "opl3: can't grab left port 0x%lx\n", l_port);
 419                         snd_device_free(card, opl3);
 420                         return -EBUSY;
 421                 }
 422                 if (r_port != 0 &&
 423                     (opl3->res_r_port = request_region(r_port, 2, "OPL2/3 (right)")) == NULL) {
 424                         snd_printk(KERN_ERR "opl3: can't grab right port 0x%lx\n", r_port);
 425                         snd_device_free(card, opl3);
 426                         return -EBUSY;
 427                 }
 428         }
 429         opl3->l_port = l_port;
 430         opl3->r_port = r_port;
 431
 432         switch (opl3->hardware) {
 433         /* some hardware doesn't support timers */
 434         case OPL3_HW_OPL3_SV:
 435         case OPL3_HW_OPL3_CS:
 436         case OPL3_HW_OPL3_FM801:
 437                 opl3->command = &snd_opl3_command;
 438                 break;
 439         default:
 440                 opl3->command = &snd_opl2_command;
 441                 if ((err = snd_opl3_detect(opl3)) < 0) {
 442                         snd_printd("OPL2/3 chip not detected at 0x%lx/0x%lx\n",
 443                                    opl3->l_port, opl3->r_port);
 444                         snd_device_free(card, opl3);
 445                         return err;
 446                 }
 447                 /* detect routine returns correct hardware type */
 448                 switch (opl3->hardware & OPL3_HW_MASK) {
 449                 case OPL3_HW_OPL3:
 450                 case OPL3_HW_OPL4:
 451                         opl3->command = &snd_opl3_command;
 452                 }
 453         }
 454
 455         snd_opl3_init(opl3);
 456
 457         *ropl3 = opl3;
 458         return 0;
 459 }
 460
 461 EXPORT_SYMBOL(snd_opl3_create);
 462
 463 int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev)
 464 {
 465         int err;
 466
 467         if (timer1_dev >= 0)
 468                 if ((err = snd_opl3_timer1_init(opl3, timer1_dev)) < 0)
 469                         return err;
 470         if (timer2_dev >= 0) {
 471                 if ((err = snd_opl3_timer2_init(opl3, timer2_dev)) < 0) {
 472                         snd_device_free(opl3->card, opl3->timer1);
 473                         opl3->timer1 = NULL;
 474                         return err;
 475                 }
 476         }
 477         return 0;
 478 }
 479
 480 EXPORT_SYMBOL(snd_opl3_timer_new);
 481
 482 int snd_opl3_hwdep_new(struct snd_opl3 * opl3,
 483                        int device, int seq_device,
 484                        struct snd_hwdep ** rhwdep)
 485 {
 486         struct snd_hwdep *hw;
 487         struct snd_card *card = opl3->card;
 488         int err;
 489
 490         if (rhwdep)
 491                 *rhwdep = NULL;
 492
 493         /* create hardware dependent device (direct FM) */
 494
 495         if ((err = snd_hwdep_new(card, "OPL2/OPL3", device, &hw)) < 0) {
 496                 snd_device_free(card, opl3);
 497                 return err;
 498         }
 499         hw->private_data = opl3;
 500         hw->exclusive = 1;
 501 #ifdef CONFIG_SND_OSSEMUL
 502         if (device == 0)
 503                 hw->oss_type = SNDRV_OSS_DEVICE_TYPE_DMFM;
 504 #endif
 505         strcpy(hw->name, hw->id);
 506         switch (opl3->hardware & OPL3_HW_MASK) {
 507         case OPL3_HW_OPL2:
 508                 strcpy(hw->name, "OPL2 FM");
 509                 hw->iface = SNDRV_HWDEP_IFACE_OPL2;
 510                 break;
 511         case OPL3_HW_OPL3:
 512                 strcpy(hw->name, "OPL3 FM");
 513                 hw->iface = SNDRV_HWDEP_IFACE_OPL3;
 514                 break;
 515         case OPL3_HW_OPL4:
 516                 strcpy(hw->name, "OPL4 FM");
 517                 hw->iface = SNDRV_HWDEP_IFACE_OPL4;
 518                 break;
 519         }
 520
 521         /* operators - only ioctl */
 522         hw->ops.open = snd_opl3_open;
 523         hw->ops.ioctl = snd_opl3_ioctl;
 524         hw->ops.write = snd_opl3_write;
 525         hw->ops.release = snd_opl3_release;
 526
 527         opl3->hwdep = hw;
 528         opl3->seq_dev_num = seq_device;
 529 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
 530         if (snd_seq_device_new(card, seq_device, SNDRV_SEQ_DEV_ID_OPL3,
 531                                sizeof(struct snd_opl3 *), &opl3->seq_dev) >= 0) {
 532                 strcpy(opl3->seq_dev->name, hw->name);
 533                 *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(opl3->seq_dev) = opl3;
 534         }
 535 #endif
 536         if (rhwdep)
 537                 *rhwdep = hw;
 538         return 0;
 539 }
 540
 541 EXPORT_SYMBOL(snd_opl3_hwdep_new);
 542
 543 /*
 544  *  INIT part
 545  */
 546
 547 static int __init alsa_opl3_init(void)
 548 {
 549         return 0;
 550 }
 551
 552 static void __exit alsa_opl3_exit(void)
 553 {
 554 }
 555
 556 module_init(alsa_opl3_init)
 557 module_exit(alsa_opl3_exit)