sound/isa/galaxy/galaxy.c

   1 /*
   2  * Aztech AZT1605/AZT2316 Driver
   3  * Copyright (C) 2007,2010  Rene Herman
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/isa.h>
  23 #include <linux/delay.h>
  24 #include <linux/io.h>
  25 #include <asm/processor.h>
  26 #include <sound/core.h>
  27 #include <sound/initval.h>
  28 #include <sound/wss.h>
  29 #include <sound/mpu401.h>
  30 #include <sound/opl3.h>
  31
  32 MODULE_DESCRIPTION(CRD_NAME);
  33 MODULE_AUTHOR("Rene Herman");
  34 MODULE_LICENSE("GPL");
  35
  36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  37 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  38 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
  39
  40 module_param_array(index, int, NULL, 0444);
  41 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
  42 module_param_array(id, charp, NULL, 0444);
  43 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
  44 module_param_array(enable, bool, NULL, 0444);
  45 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
  46
  47 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  48 static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  49 static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  50 static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  51 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  52 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  53 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  54 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  55
  56 module_param_array(port, long, NULL, 0444);
  57 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
  58 module_param_array(wss_port, long, NULL, 0444);
  59 MODULE_PARM_DESC(wss_port, "WSS port # for " CRD_NAME " driver.");
  60 module_param_array(mpu_port, long, NULL, 0444);
  61 MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
  62 module_param_array(fm_port, long, NULL, 0444);
  63 MODULE_PARM_DESC(fm_port, "FM port # for " CRD_NAME " driver.");
  64 module_param_array(irq, int, NULL, 0444);
  65 MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
  66 module_param_array(mpu_irq, int, NULL, 0444);
  67 MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
  68 module_param_array(dma1, int, NULL, 0444);
  69 MODULE_PARM_DESC(dma1, "Playback DMA # for " CRD_NAME " driver.");
  70 module_param_array(dma2, int, NULL, 0444);
  71 MODULE_PARM_DESC(dma2, "Capture DMA # for " CRD_NAME " driver.");
  72
  73 /*
  74  * Generic SB DSP support routines
  75  */
  76
  77 #define DSP_PORT_RESET          0x6
  78 #define DSP_PORT_READ           0xa
  79 #define DSP_PORT_COMMAND        0xc
  80 #define DSP_PORT_STATUS         0xc
  81 #define DSP_PORT_DATA_AVAIL     0xe
  82
  83 #define DSP_SIGNATURE           0xaa
  84
  85 #define DSP_COMMAND_GET_VERSION 0xe1
  86
  87 static int __devinit dsp_get_byte(void __iomem *port, u8 *val)
  88 {
  89         int loops = 1000;
  90
  91         while (!(ioread8(port + DSP_PORT_DATA_AVAIL) & 0x80)) {
  92                 if (!loops--)
  93                         return -EIO;
  94                 cpu_relax();
  95         }
  96         *val = ioread8(port + DSP_PORT_READ);
  97         return 0;
  98 }
  99
 100 static int __devinit dsp_reset(void __iomem *port)
 101 {
 102         u8 val;
 103
 104         iowrite8(1, port + DSP_PORT_RESET);
 105         udelay(10);
 106         iowrite8(0, port + DSP_PORT_RESET);
 107
 108         if (dsp_get_byte(port, &val) < 0 || val != DSP_SIGNATURE)
 109                 return -ENODEV;
 110
 111         return 0;
 112 }
 113
 114 static int __devinit dsp_command(void __iomem *port, u8 cmd)
 115 {
 116         int loops = 1000;
 117
 118         while (ioread8(port + DSP_PORT_STATUS) & 0x80) {
 119                 if (!loops--)
 120                         return -EIO;
 121                 cpu_relax();
 122         }
 123         iowrite8(cmd, port + DSP_PORT_COMMAND);
 124         return 0;
 125 }
 126
 127 static int __devinit dsp_get_version(void __iomem *port, u8 *major, u8 *minor)
 128 {
 129         int err;
 130
 131         err = dsp_command(port, DSP_COMMAND_GET_VERSION);
 132         if (err < 0)
 133                 return err;
 134
 135         err = dsp_get_byte(port, major);
 136         if (err < 0)
 137                 return err;
 138
 139         err = dsp_get_byte(port, minor);
 140         if (err < 0)
 141                 return err;
 142
 143         return 0;
 144 }
 145
 146 /*
 147  * Generic WSS support routines
 148  */
 149
 150 #define WSS_CONFIG_DMA_0        (1 << 0)
 151 #define WSS_CONFIG_DMA_1        (2 << 0)
 152 #define WSS_CONFIG_DMA_3        (3 << 0)
 153 #define WSS_CONFIG_DUPLEX       (1 << 2)
 154 #define WSS_CONFIG_IRQ_7        (1 << 3)
 155 #define WSS_CONFIG_IRQ_9        (2 << 3)
 156 #define WSS_CONFIG_IRQ_10       (3 << 3)
 157 #define WSS_CONFIG_IRQ_11       (4 << 3)
 158
 159 #define WSS_PORT_CONFIG         0
 160 #define WSS_PORT_SIGNATURE      3
 161
 162 #define WSS_SIGNATURE           4
 163
 164 static int __devinit wss_detect(void __iomem *wss_port)
 165 {
 166         if ((ioread8(wss_port + WSS_PORT_SIGNATURE) & 0x3f) != WSS_SIGNATURE)
 167                 return -ENODEV;
 168
 169         return 0;
 170 }
 171
 172 static void wss_set_config(void __iomem *wss_port, u8 wss_config)
 173 {
 174         iowrite8(wss_config, wss_port + WSS_PORT_CONFIG);
 175 }
 176
 177 /*
 178  * Aztech Sound Galaxy specifics
 179  */
 180
 181 #define GALAXY_PORT_CONFIG      1024
 182 #define CONFIG_PORT_SET         4
 183
 184 #define DSP_COMMAND_GALAXY_8    8
 185 #define GALAXY_COMMAND_GET_TYPE 5
 186
 187 #define DSP_COMMAND_GALAXY_9    9
 188 #define GALAXY_COMMAND_WSSMODE  0
 189 #define GALAXY_COMMAND_SB8MODE  1
 190
 191 #define GALAXY_MODE_WSS         GALAXY_COMMAND_WSSMODE
 192 #define GALAXY_MODE_SB8         GALAXY_COMMAND_SB8MODE
 193
 194 struct snd_galaxy {
 195         void __iomem *port;
 196         void __iomem *config_port;
 197         void __iomem *wss_port;
 198         u32 config;
 199         struct resource *res_port;
 200         struct resource *res_config_port;
 201         struct resource *res_wss_port;
 202 };
 203
 204 static u32 config[SNDRV_CARDS];
 205 static u8 wss_config[SNDRV_CARDS];
 206
 207 static int __devinit snd_galaxy_match(struct device *dev, unsigned int n)
 208 {
 209         if (!enable[n])
 210                 return 0;
 211
 212         switch (port[n]) {
 213         case SNDRV_AUTO_PORT:
 214                 dev_err(dev, "please specify port\n");
 215                 return 0;
 216         case 0x220:
 217                 config[n] |= GALAXY_CONFIG_SBA_220;
 218                 break;
 219         case 0x240:
 220                 config[n] |= GALAXY_CONFIG_SBA_240;
 221                 break;
 222         case 0x260:
 223                 config[n] |= GALAXY_CONFIG_SBA_260;
 224                 break;
 225         case 0x280:
 226                 config[n] |= GALAXY_CONFIG_SBA_280;
 227                 break;
 228         default:
 229                 dev_err(dev, "invalid port %#lx\n", port[n]);
 230                 return 0;
 231         }
 232
 233         switch (wss_port[n]) {
 234         case SNDRV_AUTO_PORT:
 235                 dev_err(dev,  "please specify wss_port\n");
 236                 return 0;
 237         case 0x530:
 238                 config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_530;
 239                 break;
 240         case 0x604:
 241                 config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_604;
 242                 break;
 243         case 0xe80:
 244                 config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_E80;
 245                 break;
 246         case 0xf40:
 247                 config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_F40;
 248                 break;
 249         default:
 250                 dev_err(dev, "invalid WSS port %#lx\n", wss_port[n]);
 251                 return 0;
 252         }
 253
 254         switch (irq[n]) {
 255         case SNDRV_AUTO_IRQ:
 256                 dev_err(dev,  "please specify irq\n");
 257                 return 0;
 258         case 7:
 259                 wss_config[n] |= WSS_CONFIG_IRQ_7;
 260                 break;
 261         case 2:
 262                 irq[n] = 9;
 263         case 9:
 264                 wss_config[n] |= WSS_CONFIG_IRQ_9;
 265                 break;
 266         case 10:
 267                 wss_config[n] |= WSS_CONFIG_IRQ_10;
 268                 break;
 269         case 11:
 270                 wss_config[n] |= WSS_CONFIG_IRQ_11;
 271                 break;
 272         default:
 273                 dev_err(dev, "invalid IRQ %d\n", irq[n]);
 274                 return 0;
 275         }
 276
 277         switch (dma1[n]) {
 278         case SNDRV_AUTO_DMA:
 279                 dev_err(dev,  "please specify dma1\n");
 280                 return 0;
 281         case 0:
 282                 wss_config[n] |= WSS_CONFIG_DMA_0;
 283                 break;
 284         case 1:
 285                 wss_config[n] |= WSS_CONFIG_DMA_1;
 286                 break;
 287         case 3:
 288                 wss_config[n] |= WSS_CONFIG_DMA_3;
 289                 break;
 290         default:
 291                 dev_err(dev, "invalid playback DMA %d\n", dma1[n]);
 292                 return 0;
 293         }
 294
 295         if (dma2[n] == SNDRV_AUTO_DMA || dma2[n] == dma1[n]) {
 296                 dma2[n] = -1;
 297                 goto mpu;
 298         }
 299
 300         wss_config[n] |= WSS_CONFIG_DUPLEX;
 301         switch (dma2[n]) {
 302         case 0:
 303                 break;
 304         case 1:
 305                 if (dma1[n] == 0)
 306                         break;
 307         default:
 308                 dev_err(dev, "invalid capture DMA %d\n", dma2[n]);
 309                 return 0;
 310         }
 311
 312 mpu:
 313         switch (mpu_port[n]) {
 314         case SNDRV_AUTO_PORT:
 315                 dev_warn(dev, "mpu_port not specified; not using MPU-401\n");
 316                 mpu_port[n] = -1;
 317                 goto fm;
 318         case 0x300:
 319                 config[n] |= GALAXY_CONFIG_MPU_ENABLE | GALAXY_CONFIG_MPUA_300;
 320                 break;
 321         case 0x330:
 322                 config[n] |= GALAXY_CONFIG_MPU_ENABLE | GALAXY_CONFIG_MPUA_330;
 323                 break;
 324         default:
 325                 dev_err(dev, "invalid MPU port %#lx\n", mpu_port[n]);
 326                 return 0;
 327         }
 328
 329         switch (mpu_irq[n]) {
 330         case SNDRV_AUTO_IRQ:
 331                 dev_warn(dev, "mpu_irq not specified: using polling mode\n");
 332                 mpu_irq[n] = -1;
 333                 break;
 334         case 2:
 335                 mpu_irq[n] = 9;
 336         case 9:
 337                 config[n] |= GALAXY_CONFIG_MPUIRQ_2;
 338                 break;
 339 #ifdef AZT1605
 340         case 3:
 341                 config[n] |= GALAXY_CONFIG_MPUIRQ_3;
 342                 break;
 343 #endif
 344         case 5:
 345                 config[n] |= GALAXY_CONFIG_MPUIRQ_5;
 346                 break;
 347         case 7:
 348                 config[n] |= GALAXY_CONFIG_MPUIRQ_7;
 349                 break;
 350 #ifdef AZT2316
 351         case 10:
 352                 config[n] |= GALAXY_CONFIG_MPUIRQ_10;
 353                 break;
 354 #endif
 355         default:
 356                 dev_err(dev, "invalid MPU IRQ %d\n", mpu_irq[n]);
 357                 return 0;
 358         }
 359
 360         if (mpu_irq[n] == irq[n]) {
 361                 dev_err(dev, "cannot share IRQ between WSS and MPU-401\n");
 362                 return 0;
 363         }
 364
 365 fm:
 366         switch (fm_port[n]) {
 367         case SNDRV_AUTO_PORT:
 368                 dev_warn(dev, "fm_port not specified: not using OPL3\n");
 369                 fm_port[n] = -1;
 370                 break;
 371         case 0x388:
 372                 break;
 373         default:
 374                 dev_err(dev, "illegal FM port %#lx\n", fm_port[n]);
 375                 return 0;
 376         }
 377
 378         config[n] |= GALAXY_CONFIG_GAME_ENABLE;
 379         return 1;
 380 }
 381
 382 static int __devinit galaxy_init(struct snd_galaxy *galaxy, u8 *type)
 383 {
 384         u8 major;
 385         u8 minor;
 386         int err;
 387
 388         err = dsp_reset(galaxy->port);
 389         if (err < 0)
 390                 return err;
 391
 392         err = dsp_get_version(galaxy->port, &major, &minor);
 393         if (err < 0)
 394                 return err;
 395
 396         if (major != GALAXY_DSP_MAJOR || minor != GALAXY_DSP_MINOR)
 397                 return -ENODEV;
 398
 399         err = dsp_command(galaxy->port, DSP_COMMAND_GALAXY_8);
 400         if (err < 0)
 401                 return err;
 402
 403         err = dsp_command(galaxy->port, GALAXY_COMMAND_GET_TYPE);
 404         if (err < 0)
 405                 return err;
 406
 407         err = dsp_get_byte(galaxy->port, type);
 408         if (err < 0)
 409                 return err;
 410
 411         return 0;
 412 }
 413
 414 static int __devinit galaxy_set_mode(struct snd_galaxy *galaxy, u8 mode)
 415 {
 416         int err;
 417
 418         err = dsp_command(galaxy->port, DSP_COMMAND_GALAXY_9);
 419         if (err < 0)
 420                 return err;
 421
 422         err = dsp_command(galaxy->port, mode);
 423         if (err < 0)
 424                 return err;
 425
 426 #ifdef AZT1605
 427         /*
 428          * Needed for MPU IRQ on AZT1605, but AZT2316 loses WSS again
 429          */
 430         err = dsp_reset(galaxy->port);
 431         if (err < 0)
 432                 return err;
 433 #endif
 434
 435         return 0;
 436 }
 437
 438 static void galaxy_set_config(struct snd_galaxy *galaxy, u32 config)
 439 {
 440         u8 tmp = ioread8(galaxy->config_port + CONFIG_PORT_SET);
 441         int i;
 442
 443         iowrite8(tmp | 0x80, galaxy->config_port + CONFIG_PORT_SET);
 444         for (i = 0; i < GALAXY_CONFIG_SIZE; i++) {
 445                 iowrite8(config, galaxy->config_port + i);
 446                 config >>= 8;
 447         }
 448         iowrite8(tmp & 0x7f, galaxy->config_port + CONFIG_PORT_SET);
 449         msleep(10);
 450 }
 451
 452 static void __devinit galaxy_config(struct snd_galaxy *galaxy, u32 config)
 453 {
 454         int i;
 455
 456         for (i = GALAXY_CONFIG_SIZE; i; i--) {
 457                 u8 tmp = ioread8(galaxy->config_port + i - 1);
 458                 galaxy->config = (galaxy->config << 8) | tmp;
 459         }
 460         config |= galaxy->config & GALAXY_CONFIG_MASK;
 461         galaxy_set_config(galaxy, config);
 462 }
 463
 464 static int __devinit galaxy_wss_config(struct snd_galaxy *galaxy, u8 wss_config)
 465 {
 466         int err;
 467
 468         err = wss_detect(galaxy->wss_port);
 469         if (err < 0)
 470                 return err;
 471
 472         wss_set_config(galaxy->wss_port, wss_config);
 473
 474         err = galaxy_set_mode(galaxy, GALAXY_MODE_WSS);
 475         if (err < 0)
 476                 return err;
 477
 478         return 0;
 479 }
 480
 481 static void snd_galaxy_free(struct snd_card *card)
 482 {
 483         struct snd_galaxy *galaxy = card->private_data;
 484
 485         if (galaxy->wss_port) {
 486                 wss_set_config(galaxy->wss_port, 0);
 487                 ioport_unmap(galaxy->wss_port);
 488                 release_and_free_resource(galaxy->res_wss_port);
 489         }
 490         if (galaxy->config_port) {
 491                 galaxy_set_config(galaxy, galaxy->config);
 492                 ioport_unmap(galaxy->config_port);
 493                 release_and_free_resource(galaxy->res_config_port);
 494         }
 495         if (galaxy->port) {
 496                 ioport_unmap(galaxy->port);
 497                 release_and_free_resource(galaxy->res_port);
 498         }
 499 }
 500
 501 static int __devinit snd_galaxy_probe(struct device *dev, unsigned int n)
 502 {
 503         struct snd_galaxy *galaxy;
 504         struct snd_wss *chip;
 505         struct snd_card *card;
 506         u8 type;
 507         int err;
 508
 509         err = snd_card_create(index[n], id[n], THIS_MODULE, sizeof *galaxy,
 510                               &card);
 511         if (err < 0)
 512                 return err;
 513
 514         snd_card_set_dev(card, dev);
 515
 516         card->private_free = snd_galaxy_free;
 517         galaxy = card->private_data;
 518
 519         galaxy->res_port = request_region(port[n], 16, DRV_NAME);
 520         if (!galaxy->res_port) {
 521                 dev_err(dev, "could not grab ports %#lx-%#lx\n", port[n],
 522                         port[n] + 15);
 523                 err = -EBUSY;
 524                 goto error;
 525         }
 526         galaxy->port = ioport_map(port[n], 16);
 527
 528         err = galaxy_init(galaxy, &type);
 529         if (err < 0) {
 530                 dev_err(dev, "did not find a Sound Galaxy at %#lx\n", port[n]);
 531                 goto error;
 532         }
 533         dev_info(dev, "Sound Galaxy (type %d) found at %#lx\n", type, port[n]);
 534
 535         galaxy->res_config_port = request_region(port[n] + GALAXY_PORT_CONFIG,
 536                                                  16, DRV_NAME);
 537         if (!galaxy->res_config_port) {
 538                 dev_err(dev, "could not grab ports %#lx-%#lx\n",
 539                         port[n] + GALAXY_PORT_CONFIG,
 540                         port[n] + GALAXY_PORT_CONFIG + 15);
 541                 err = -EBUSY;
 542                 goto error;
 543         }
 544         galaxy->config_port = ioport_map(port[n] + GALAXY_PORT_CONFIG, 16);
 545
 546         galaxy_config(galaxy, config[n]);
 547
 548         galaxy->res_wss_port = request_region(wss_port[n], 4, DRV_NAME);
 549         if (!galaxy->res_wss_port)  {
 550                 dev_err(dev, "could not grab ports %#lx-%#lx\n", wss_port[n],
 551                         wss_port[n] + 3);
 552                 err = -EBUSY;
 553                 goto error;
 554         }
 555         galaxy->wss_port = ioport_map(wss_port[n], 4);
 556
 557         err = galaxy_wss_config(galaxy, wss_config[n]);
 558         if (err < 0) {
 559                 dev_err(dev, "could not configure WSS\n");
 560                 goto error;
 561         }
 562
 563         strcpy(card->driver, DRV_NAME);
 564         strcpy(card->shortname, DRV_NAME);
 565         sprintf(card->longname, "%s at %#lx/%#lx, irq %d, dma %d/%d",
 566                 card->shortname, port[n], wss_port[n], irq[n], dma1[n],
 567                 dma2[n]);
 568
 569         err = snd_wss_create(card, wss_port[n] + 4, -1, irq[n], dma1[n],
 570                              dma2[n], WSS_HW_DETECT, 0, &chip);
 571         if (err < 0)
 572                 goto error;
 573
 574         err = snd_wss_pcm(chip, 0, NULL);
 575         if (err < 0)
 576                 goto error;
 577
 578         err = snd_wss_mixer(chip);
 579         if (err < 0)
 580                 goto error;
 581
 582         err = snd_wss_timer(chip, 0, NULL);
 583         if (err < 0)
 584                 goto error;
 585
 586         if (mpu_port[n] >= 0) {
 587                 err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
 588                                           mpu_port[n], 0, mpu_irq[n], NULL);
 589                 if (err < 0)
 590                         goto error;
 591         }
 592
 593         if (fm_port[n] >= 0) {
 594                 struct snd_opl3 *opl3;
 595
 596                 err = snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
 597                                       OPL3_HW_AUTO, 0, &opl3);
 598                 if (err < 0) {
 599                         dev_err(dev, "no OPL device at %#lx\n", fm_port[n]);
 600                         goto error;
 601                 }
 602                 err = snd_opl3_timer_new(opl3, 1, 2);
 603                 if (err < 0)
 604                         goto error;
 605
 606                 err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
 607                 if (err < 0)
 608                         goto error;
 609         }
 610
 611         err = snd_card_register(card);
 612         if (err < 0)
 613                 goto error;
 614
 615         dev_set_drvdata(dev, card);
 616         return 0;
 617
 618 error:
 619         snd_card_free(card);
 620         return err;
 621 }
 622
 623 static int __devexit snd_galaxy_remove(struct device *dev, unsigned int n)
 624 {
 625         snd_card_free(dev_get_drvdata(dev));
 626         dev_set_drvdata(dev, NULL);
 627         return 0;
 628 }
 629
 630 static struct isa_driver snd_galaxy_driver = {
 631         .match          = snd_galaxy_match,
 632         .probe          = snd_galaxy_probe,
 633         .remove         = __devexit_p(snd_galaxy_remove),
 634
 635         .driver         = {
 636                 .name   = DEV_NAME
 637         }
 638 };
 639
 640 static int __init alsa_card_galaxy_init(void)
 641 {
 642         return isa_register_driver(&snd_galaxy_driver, SNDRV_CARDS);
 643 }
 644
 645 static void __exit alsa_card_galaxy_exit(void)
 646 {
 647         isa_unregister_driver(&snd_galaxy_driver);
 648 }
 649
 650 module_init(alsa_card_galaxy_init);
 651 module_exit(alsa_card_galaxy_exit);