sound/isa/sscape.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Low-level ALSA driver for the ENSONIQ SoundScape
   4  *   Copyright (c) by Chris Rankin
   5  *
   6  *   This driver was written in part using information obtained from
   7  *   the OSS/Free SoundScape driver, written by Hannu Savolainen.
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/err.h>
  12 #include <linux/io.h>
  13 #include <linux/isa.h>
  14 #include <linux/delay.h>
  15 #include <linux/firmware.h>
  16 #include <linux/pnp.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/module.h>
  19 #include <asm/dma.h>
  20 #include <sound/core.h>
  21 #include <sound/wss.h>
  22 #include <sound/mpu401.h>
  23 #include <sound/initval.h>
  24
  25
  26 MODULE_AUTHOR("Chris Rankin");
  27 MODULE_DESCRIPTION("ENSONIQ SoundScape driver");
  28 MODULE_LICENSE("GPL");
  29 MODULE_FIRMWARE("sndscape.co0");
  30 MODULE_FIRMWARE("sndscape.co1");
  31 MODULE_FIRMWARE("sndscape.co2");
  32 MODULE_FIRMWARE("sndscape.co3");
  33 MODULE_FIRMWARE("sndscape.co4");
  34 MODULE_FIRMWARE("scope.cod");
  35
  36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  37 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  38 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  39 static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  40 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  41 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  42 static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  43 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  44 static bool joystick[SNDRV_CARDS];
  45
  46 module_param_array(index, int, NULL, 0444);
  47 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
  48
  49 module_param_array(id, charp, NULL, 0444);
  50 MODULE_PARM_DESC(id, "Description for SoundScape card");
  51
  52 module_param_hw_array(port, long, ioport, NULL, 0444);
  53 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
  54
  55 module_param_hw_array(wss_port, long, ioport, NULL, 0444);
  56 MODULE_PARM_DESC(wss_port, "WSS Port # for SoundScape driver.");
  57
  58 module_param_hw_array(irq, int, irq, NULL, 0444);
  59 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
  60
  61 module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
  62 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
  63
  64 module_param_hw_array(dma, int, dma, NULL, 0444);
  65 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
  66
  67 module_param_hw_array(dma2, int, dma, NULL, 0444);
  68 MODULE_PARM_DESC(dma2, "DMA2 # for SoundScape driver.");
  69
  70 module_param_array(joystick, bool, NULL, 0444);
  71 MODULE_PARM_DESC(joystick, "Enable gameport.");
  72
  73 #ifdef CONFIG_PNP
  74 static int isa_registered;
  75 static int pnp_registered;
  76
  77 static const struct pnp_card_device_id sscape_pnpids[] = {
  78         { .id = "ENS3081", .devs = { { "ENS0000" } } }, /* Soundscape PnP */
  79         { .id = "ENS4081", .devs = { { "ENS1011" } } }, /* VIVO90 */
  80         { .id = "" }    /* end */
  81 };
  82
  83 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
  84 #endif
  85
  86
  87 #define HOST_CTRL_IO(i)  ((i) + 2)
  88 #define HOST_DATA_IO(i)  ((i) + 3)
  89 #define ODIE_ADDR_IO(i)  ((i) + 4)
  90 #define ODIE_DATA_IO(i)  ((i) + 5)
  91 #define CODEC_IO(i)      ((i) + 8)
  92
  93 #define IC_ODIE  1
  94 #define IC_OPUS  2
  95
  96 #define RX_READY 0x01
  97 #define TX_READY 0x02
  98
  99 #define CMD_ACK                 0x80
 100 #define CMD_SET_MIDI_VOL        0x84
 101 #define CMD_GET_MIDI_VOL        0x85
 102 #define CMD_XXX_MIDI_VOL        0x86
 103 #define CMD_SET_EXTMIDI         0x8a
 104 #define CMD_GET_EXTMIDI         0x8b
 105 #define CMD_SET_MT32            0x8c
 106 #define CMD_GET_MT32            0x8d
 107
 108 enum GA_REG {
 109         GA_INTSTAT_REG = 0,
 110         GA_INTENA_REG,
 111         GA_DMAA_REG,
 112         GA_DMAB_REG,
 113         GA_INTCFG_REG,
 114         GA_DMACFG_REG,
 115         GA_CDCFG_REG,
 116         GA_SMCFGA_REG,
 117         GA_SMCFGB_REG,
 118         GA_HMCTL_REG
 119 };
 120
 121 #define DMA_8BIT  0x80
 122
 123
 124 enum card_type {
 125         MEDIA_FX,       /* Sequoia S-1000 */
 126         SSCAPE,         /* Sequoia S-2000 */
 127         SSCAPE_PNP,
 128         SSCAPE_VIVO,
 129 };
 130
 131 struct soundscape {
 132         spinlock_t lock;
 133         unsigned io_base;
 134         int ic_type;
 135         enum card_type type;
 136         struct resource *io_res;
 137         struct resource *wss_res;
 138         struct snd_wss *chip;
 139
 140         unsigned char midi_vol;
 141 };
 142
 143 #define INVALID_IRQ  ((unsigned)-1)
 144
 145
 146 static inline struct soundscape *get_card_soundscape(struct snd_card *c)
 147 {
 148         return (struct soundscape *) (c->private_data);
 149 }
 150
 151 /*
 152  * Allocates some kernel memory that we can use for DMA.
 153  * I think this means that the memory has to map to
 154  * contiguous pages of physical memory.
 155  */
 156 static struct snd_dma_buffer *get_dmabuf(struct soundscape *s,
 157                                          struct snd_dma_buffer *buf,
 158                                          unsigned long size)
 159 {
 160         if (buf) {
 161                 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
 162                                                  s->chip->card->dev,
 163                                                  size, buf) < 0) {
 164                         snd_printk(KERN_ERR "sscape: Failed to allocate "
 165                                             "%lu bytes for DMA\n",
 166                                             size);
 167                         return NULL;
 168                 }
 169         }
 170
 171         return buf;
 172 }
 173
 174 /*
 175  * Release the DMA-able kernel memory ...
 176  */
 177 static void free_dmabuf(struct snd_dma_buffer *buf)
 178 {
 179         if (buf && buf->area)
 180                 snd_dma_free_pages(buf);
 181 }
 182
 183 /*
 184  * This function writes to the SoundScape's control registers,
 185  * but doesn't do any locking. It's up to the caller to do that.
 186  * This is why this function is "unsafe" ...
 187  */
 188 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg,
 189                                        unsigned char val)
 190 {
 191         outb(reg, ODIE_ADDR_IO(io_base));
 192         outb(val, ODIE_DATA_IO(io_base));
 193 }
 194
 195 /*
 196  * Write to the SoundScape's control registers, and do the
 197  * necessary locking ...
 198  */
 199 static void sscape_write(struct soundscape *s, enum GA_REG reg,
 200                          unsigned char val)
 201 {
 202         unsigned long flags;
 203
 204         spin_lock_irqsave(&s->lock, flags);
 205         sscape_write_unsafe(s->io_base, reg, val);
 206         spin_unlock_irqrestore(&s->lock, flags);
 207 }
 208
 209 /*
 210  * Read from the SoundScape's control registers, but leave any
 211  * locking to the caller. This is why the function is "unsafe" ...
 212  */
 213 static inline unsigned char sscape_read_unsafe(unsigned io_base,
 214                                                enum GA_REG reg)
 215 {
 216         outb(reg, ODIE_ADDR_IO(io_base));
 217         return inb(ODIE_DATA_IO(io_base));
 218 }
 219
 220 /*
 221  * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
 222  */
 223 static inline void set_host_mode_unsafe(unsigned io_base)
 224 {
 225         outb(0x0, HOST_CTRL_IO(io_base));
 226 }
 227
 228 /*
 229  * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
 230  */
 231 static inline void set_midi_mode_unsafe(unsigned io_base)
 232 {
 233         outb(0x3, HOST_CTRL_IO(io_base));
 234 }
 235
 236 /*
 237  * Read the SoundScape's host-mode control register, but leave
 238  * any locking issues to the caller ...
 239  */
 240 static inline int host_read_unsafe(unsigned io_base)
 241 {
 242         int data = -1;
 243         if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0)
 244                 data = inb(HOST_DATA_IO(io_base));
 245
 246         return data;
 247 }
 248
 249 /*
 250  * Read the SoundScape's host-mode control register, performing
 251  * a limited amount of busy-waiting if the register isn't ready.
 252  * Also leaves all locking-issues to the caller ...
 253  */
 254 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
 255 {
 256         int data;
 257
 258         while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
 259                 udelay(100);
 260                 --timeout;
 261         } /* while */
 262
 263         return data;
 264 }
 265
 266 /*
 267  * Write to the SoundScape's host-mode control registers, but
 268  * leave any locking issues to the caller ...
 269  */
 270 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
 271 {
 272         if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
 273                 outb(data, HOST_DATA_IO(io_base));
 274                 return 1;
 275         }
 276
 277         return 0;
 278 }
 279
 280 /*
 281  * Write to the SoundScape's host-mode control registers, performing
 282  * a limited amount of busy-waiting if the register isn't ready.
 283  * Also leaves all locking-issues to the caller ...
 284  */
 285 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
 286                                   unsigned timeout)
 287 {
 288         int err;
 289
 290         while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
 291                 udelay(100);
 292                 --timeout;
 293         } /* while */
 294
 295         return err;
 296 }
 297
 298
 299 /*
 300  * Check that the MIDI subsystem is operational. If it isn't,
 301  * then we will hang the computer if we try to use it ...
 302  *
 303  * NOTE: This check is based upon observation, not documentation.
 304  */
 305 static inline int verify_mpu401(const struct snd_mpu401 *mpu)
 306 {
 307         return ((inb(MPU401C(mpu)) & 0xc0) == 0x80);
 308 }
 309
 310 /*
 311  * This is apparently the standard way to initailise an MPU-401
 312  */
 313 static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
 314 {
 315         outb(0, MPU401D(mpu));
 316 }
 317
 318 /*
 319  * Tell the SoundScape to activate the AD1845 chip (I think).
 320  * The AD1845 detection fails if we *don't* do this, so I
 321  * think that this is a good idea ...
 322  */
 323 static void activate_ad1845_unsafe(unsigned io_base)
 324 {
 325         unsigned char val = sscape_read_unsafe(io_base, GA_HMCTL_REG);
 326         sscape_write_unsafe(io_base, GA_HMCTL_REG, (val & 0xcf) | 0x10);
 327         sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
 328 }
 329
 330 /*
 331  * Do the necessary ALSA-level cleanup to deallocate our driver ...
 332  */
 333 static void soundscape_free(struct snd_card *c)
 334 {
 335         struct soundscape *sscape = get_card_soundscape(c);
 336         release_and_free_resource(sscape->io_res);
 337         release_and_free_resource(sscape->wss_res);
 338         free_dma(sscape->chip->dma1);
 339 }
 340
 341 /*
 342  * Tell the SoundScape to begin a DMA tranfer using the given channel.
 343  * All locking issues are left to the caller.
 344  */
 345 static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
 346 {
 347         sscape_write_unsafe(io_base, reg,
 348                             sscape_read_unsafe(io_base, reg) | 0x01);
 349         sscape_write_unsafe(io_base, reg,
 350                             sscape_read_unsafe(io_base, reg) & 0xfe);
 351 }
 352
 353 /*
 354  * Wait for a DMA transfer to complete. This is a "limited busy-wait",
 355  * and all locking issues are left to the caller.
 356  */
 357 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg,
 358                                   unsigned timeout)
 359 {
 360         while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
 361                 udelay(100);
 362                 --timeout;
 363         } /* while */
 364
 365         return sscape_read_unsafe(io_base, reg) & 0x01;
 366 }
 367
 368 /*
 369  * Wait for the On-Board Processor to return its start-up
 370  * acknowledgement sequence. This wait is too long for
 371  * us to perform "busy-waiting", and so we must sleep.
 372  * This in turn means that we must not be holding any
 373  * spinlocks when we call this function.
 374  */
 375 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
 376 {
 377         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
 378
 379         do {
 380                 unsigned long flags;
 381                 int x;
 382
 383                 spin_lock_irqsave(&s->lock, flags);
 384                 x = host_read_unsafe(s->io_base);
 385                 spin_unlock_irqrestore(&s->lock, flags);
 386                 if (x == 0xfe || x == 0xff)
 387                         return 1;
 388
 389                 msleep(10);
 390         } while (time_before(jiffies, end_time));
 391
 392         return 0;
 393 }
 394
 395 /*
 396  * Wait for the host to return its start-up acknowledgement
 397  * sequence. This wait is too long for us to perform
 398  * "busy-waiting", and so we must sleep. This in turn means
 399  * that we must not be holding any spinlocks when we call
 400  * this function.
 401  */
 402 static int host_startup_ack(struct soundscape *s, unsigned timeout)
 403 {
 404         unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
 405
 406         do {
 407                 unsigned long flags;
 408                 int x;
 409
 410                 spin_lock_irqsave(&s->lock, flags);
 411                 x = host_read_unsafe(s->io_base);
 412                 spin_unlock_irqrestore(&s->lock, flags);
 413                 if (x == 0xfe)
 414                         return 1;
 415
 416                 msleep(10);
 417         } while (time_before(jiffies, end_time));
 418
 419         return 0;
 420 }
 421
 422 /*
 423  * Upload a byte-stream into the SoundScape using DMA channel A.
 424  */
 425 static int upload_dma_data(struct soundscape *s, const unsigned char *data,
 426                            size_t size)
 427 {
 428         unsigned long flags;
 429         struct snd_dma_buffer dma;
 430         int ret;
 431         unsigned char val;
 432
 433         if (!get_dmabuf(s, &dma, PAGE_ALIGN(32 * 1024)))
 434                 return -ENOMEM;
 435
 436         spin_lock_irqsave(&s->lock, flags);
 437
 438         /*
 439          * Reset the board ...
 440          */
 441         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
 442         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val & 0x3f);
 443
 444         /*
 445          * Enable the DMA channels and configure them ...
 446          */
 447         val = (s->chip->dma1 << 4) | DMA_8BIT;
 448         sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
 449         sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
 450
 451         /*
 452          * Take the board out of reset ...
 453          */
 454         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
 455         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x80);
 456
 457         /*
 458          * Upload the firmware to the SoundScape
 459          * board through the DMA channel ...
 460          */
 461         while (size != 0) {
 462                 unsigned long len;
 463
 464                 len = min(size, dma.bytes);
 465                 memcpy(dma.area, data, len);
 466                 data += len;
 467                 size -= len;
 468
 469                 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
 470                 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
 471                 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
 472                         /*
 473                          * Don't forget to release this spinlock we're holding
 474                          */
 475                         spin_unlock_irqrestore(&s->lock, flags);
 476
 477                         snd_printk(KERN_ERR
 478                                         "sscape: DMA upload has timed out\n");
 479                         ret = -EAGAIN;
 480                         goto _release_dma;
 481                 }
 482         } /* while */
 483
 484         set_host_mode_unsafe(s->io_base);
 485         outb(0x0, s->io_base);
 486
 487         /*
 488          * Boot the board ... (I think)
 489          */
 490         val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
 491         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x40);
 492         spin_unlock_irqrestore(&s->lock, flags);
 493
 494         /*
 495          * If all has gone well, then the board should acknowledge
 496          * the new upload and tell us that it has rebooted OK. We
 497          * give it 5 seconds (max) ...
 498          */
 499         ret = 0;
 500         if (!obp_startup_ack(s, 5000)) {
 501                 snd_printk(KERN_ERR "sscape: No response "
 502                                     "from on-board processor after upload\n");
 503                 ret = -EAGAIN;
 504         } else if (!host_startup_ack(s, 5000)) {
 505                 snd_printk(KERN_ERR
 506                                 "sscape: SoundScape failed to initialise\n");
 507                 ret = -EAGAIN;
 508         }
 509
 510 _release_dma:
 511         /*
 512          * NOTE!!! We are NOT holding any spinlocks at this point !!!
 513          */
 514         sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
 515         free_dmabuf(&dma);
 516
 517         return ret;
 518 }
 519
 520 /*
 521  * Upload the bootblock(?) into the SoundScape. The only
 522  * purpose of this block of code seems to be to tell
 523  * us which version of the microcode we should be using.
 524  */
 525 static int sscape_upload_bootblock(struct snd_card *card)
 526 {
 527         struct soundscape *sscape = get_card_soundscape(card);
 528         unsigned long flags;
 529         const struct firmware *init_fw = NULL;
 530         int data = 0;
 531         int ret;
 532
 533         ret = request_firmware(&init_fw, "scope.cod", card->dev);
 534         if (ret < 0) {
 535                 snd_printk(KERN_ERR "sscape: Error loading scope.cod");
 536                 return ret;
 537         }
 538         ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
 539
 540         release_firmware(init_fw);
 541
 542         spin_lock_irqsave(&sscape->lock, flags);
 543         if (ret == 0)
 544                 data = host_read_ctrl_unsafe(sscape->io_base, 100);
 545
 546         if (data & 0x10)
 547                 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2f);
 548
 549         spin_unlock_irqrestore(&sscape->lock, flags);
 550
 551         data &= 0xf;
 552         if (ret == 0 && data > 7) {
 553                 snd_printk(KERN_ERR
 554                                 "sscape: timeout reading firmware version\n");
 555                 ret = -EAGAIN;
 556         }
 557
 558         return (ret == 0) ? data : ret;
 559 }
 560
 561 /*
 562  * Upload the microcode into the SoundScape.
 563  */
 564 static int sscape_upload_microcode(struct snd_card *card, int version)
 565 {
 566         struct soundscape *sscape = get_card_soundscape(card);
 567         const struct firmware *init_fw = NULL;
 568         char name[14];
 569         int err;
 570
 571         snprintf(name, sizeof(name), "sndscape.co%d", version);
 572
 573         err = request_firmware(&init_fw, name, card->dev);
 574         if (err < 0) {
 575                 snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
 576                                 version);
 577                 return err;
 578         }
 579         err = upload_dma_data(sscape, init_fw->data, init_fw->size);
 580         if (err == 0)
 581                 snd_printk(KERN_INFO "sscape: MIDI firmware loaded %zu KBs\n",
 582                                 init_fw->size >> 10);
 583
 584         release_firmware(init_fw);
 585
 586         return err;
 587 }
 588
 589 /*
 590  * Mixer control for the SoundScape's MIDI device.
 591  */
 592 static int sscape_midi_info(struct snd_kcontrol *ctl,
 593                             struct snd_ctl_elem_info *uinfo)
 594 {
 595         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 596         uinfo->count = 1;
 597         uinfo->value.integer.min = 0;
 598         uinfo->value.integer.max = 127;
 599         return 0;
 600 }
 601
 602 static int sscape_midi_get(struct snd_kcontrol *kctl,
 603                            struct snd_ctl_elem_value *uctl)
 604 {
 605         struct snd_wss *chip = snd_kcontrol_chip(kctl);
 606         struct snd_card *card = chip->card;
 607         register struct soundscape *s = get_card_soundscape(card);
 608         unsigned long flags;
 609
 610         spin_lock_irqsave(&s->lock, flags);
 611         uctl->value.integer.value[0] = s->midi_vol;
 612         spin_unlock_irqrestore(&s->lock, flags);
 613         return 0;
 614 }
 615
 616 static int sscape_midi_put(struct snd_kcontrol *kctl,
 617                            struct snd_ctl_elem_value *uctl)
 618 {
 619         struct snd_wss *chip = snd_kcontrol_chip(kctl);
 620         struct snd_card *card = chip->card;
 621         struct soundscape *s = get_card_soundscape(card);
 622         unsigned long flags;
 623         int change;
 624         unsigned char new_val;
 625
 626         spin_lock_irqsave(&s->lock, flags);
 627
 628         new_val = uctl->value.integer.value[0] & 127;
 629         /*
 630          * We need to put the board into HOST mode before we
 631          * can send any volume-changing HOST commands ...
 632          */
 633         set_host_mode_unsafe(s->io_base);
 634
 635         /*
 636          * To successfully change the MIDI volume setting, you seem to
 637          * have to write a volume command, write the new volume value,
 638          * and then perform another volume-related command. Perhaps the
 639          * first command is an "open" and the second command is a "close"?
 640          */
 641         if (s->midi_vol == new_val) {
 642                 change = 0;
 643                 goto __skip_change;
 644         }
 645         change = host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
 646                  && host_write_ctrl_unsafe(s->io_base, new_val, 100)
 647                  && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)
 648                  && host_write_ctrl_unsafe(s->io_base, new_val, 100);
 649         s->midi_vol = new_val;
 650 __skip_change:
 651
 652         /*
 653          * Take the board out of HOST mode and back into MIDI mode ...
 654          */
 655         set_midi_mode_unsafe(s->io_base);
 656
 657         spin_unlock_irqrestore(&s->lock, flags);
 658         return change;
 659 }
 660
 661 static const struct snd_kcontrol_new midi_mixer_ctl = {
 662         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 663         .name = "MIDI",
 664         .info = sscape_midi_info,
 665         .get = sscape_midi_get,
 666         .put = sscape_midi_put
 667 };
 668
 669 /*
 670  * The SoundScape can use two IRQs from a possible set of four.
 671  * These IRQs are encoded as bit patterns so that they can be
 672  * written to the control registers.
 673  */
 674 static unsigned get_irq_config(int sscape_type, int irq)
 675 {
 676         static const int valid_irq[] = { 9, 5, 7, 10 };
 677         static const int old_irq[] = { 9, 7, 5, 15 };
 678         unsigned cfg;
 679
 680         if (sscape_type == MEDIA_FX) {
 681                 for (cfg = 0; cfg < ARRAY_SIZE(old_irq); ++cfg)
 682                         if (irq == old_irq[cfg])
 683                                 return cfg;
 684         } else {
 685                 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg)
 686                         if (irq == valid_irq[cfg])
 687                                 return cfg;
 688         }
 689
 690         return INVALID_IRQ;
 691 }
 692
 693 /*
 694  * Perform certain arcane port-checks to see whether there
 695  * is a SoundScape board lurking behind the given ports.
 696  */
 697 static int detect_sscape(struct soundscape *s, long wss_io)
 698 {
 699         unsigned long flags;
 700         unsigned d;
 701         int retval = 0;
 702
 703         spin_lock_irqsave(&s->lock, flags);
 704
 705         /*
 706          * The following code is lifted from the original OSS driver,
 707          * and as I don't have a datasheet I cannot really comment
 708          * on what it is doing...
 709          */
 710         if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
 711                 goto _done;
 712
 713         d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
 714         if ((d & 0x80) != 0)
 715                 goto _done;
 716
 717         if (d == 0)
 718                 s->ic_type = IC_ODIE;
 719         else if ((d & 0x60) != 0)
 720                 s->ic_type = IC_OPUS;
 721         else
 722                 goto _done;
 723
 724         outb(0xfa, ODIE_ADDR_IO(s->io_base));
 725         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
 726                 goto _done;
 727
 728         outb(0xfe, ODIE_ADDR_IO(s->io_base));
 729         if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
 730                 goto _done;
 731
 732         outb(0xfe, ODIE_ADDR_IO(s->io_base));
 733         d = inb(ODIE_DATA_IO(s->io_base));
 734         if (s->type != SSCAPE_VIVO && (d & 0x9f) != 0x0e)
 735                 goto _done;
 736
 737         if (s->ic_type == IC_OPUS)
 738                 activate_ad1845_unsafe(s->io_base);
 739
 740         if (s->type == SSCAPE_VIVO)
 741                 wss_io += 4;
 742
 743         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
 744         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
 745
 746         /* wait for WSS codec */
 747         for (d = 0; d < 500; d++) {
 748                 if ((inb(wss_io) & 0x80) == 0)
 749                         break;
 750                 spin_unlock_irqrestore(&s->lock, flags);
 751                 msleep(1);
 752                 spin_lock_irqsave(&s->lock, flags);
 753         }
 754
 755         if ((inb(wss_io) & 0x80) != 0)
 756                 goto _done;
 757
 758         if (inb(wss_io + 2) == 0xff)
 759                 goto _done;
 760
 761         d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f;
 762         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d);
 763
 764         if ((inb(wss_io) & 0x80) != 0)
 765                 s->type = MEDIA_FX;
 766
 767         d = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
 768         sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
 769         /* wait for WSS codec */
 770         for (d = 0; d < 500; d++) {
 771                 if ((inb(wss_io) & 0x80) == 0)
 772                         break;
 773                 spin_unlock_irqrestore(&s->lock, flags);
 774                 msleep(1);
 775                 spin_lock_irqsave(&s->lock, flags);
 776         }
 777
 778         /*
 779          * SoundScape successfully detected!
 780          */
 781         retval = 1;
 782
 783 _done:
 784         spin_unlock_irqrestore(&s->lock, flags);
 785         return retval;
 786 }
 787
 788 /*
 789  * ALSA callback function, called when attempting to open the MIDI device.
 790  * Check that the MIDI firmware has been loaded, because we don't want
 791  * to crash the machine. Also check that someone isn't using the hardware
 792  * IOCTL device.
 793  */
 794 static int mpu401_open(struct snd_mpu401 *mpu)
 795 {
 796         if (!verify_mpu401(mpu)) {
 797                 snd_printk(KERN_ERR "sscape: MIDI disabled, "
 798                                     "please load firmware\n");
 799                 return -ENODEV;
 800         }
 801
 802         return 0;
 803 }
 804
 805 /*
 806  * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
 807  */
 808 static int create_mpu401(struct snd_card *card, int devnum,
 809                          unsigned long port, int irq)
 810 {
 811         struct soundscape *sscape = get_card_soundscape(card);
 812         struct snd_rawmidi *rawmidi;
 813         int err;
 814
 815         err = snd_mpu401_uart_new(card, devnum, MPU401_HW_MPU401, port,
 816                                   MPU401_INFO_INTEGRATED, irq, &rawmidi);
 817         if (err == 0) {
 818                 struct snd_mpu401 *mpu = rawmidi->private_data;
 819                 mpu->open_input = mpu401_open;
 820                 mpu->open_output = mpu401_open;
 821                 mpu->private_data = sscape;
 822
 823                 initialise_mpu401(mpu);
 824         }
 825
 826         return err;
 827 }
 828
 829
 830 /*
 831  * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
 832  * is very much like a CS4231, with a few extra bits. We will
 833  * try to support at least some of the extra bits by overriding
 834  * some of the CS4231 callback.
 835  */
 836 static int create_ad1845(struct snd_card *card, unsigned port,
 837                          int irq, int dma1, int dma2)
 838 {
 839         register struct soundscape *sscape = get_card_soundscape(card);
 840         struct snd_wss *chip;
 841         int err;
 842         int codec_type = WSS_HW_DETECT;
 843
 844         switch (sscape->type) {
 845         case MEDIA_FX:
 846         case SSCAPE:
 847                 /*
 848                  * There are some freak examples of early Soundscape cards
 849                  * with CS4231 instead of AD1848/CS4248. Unfortunately, the
 850                  * CS4231 works only in CS4248 compatibility mode on
 851                  * these cards so force it.
 852                  */
 853                 if (sscape->ic_type != IC_OPUS)
 854                         codec_type = WSS_HW_AD1848;
 855                 break;
 856
 857         case SSCAPE_VIVO:
 858                 port += 4;
 859                 break;
 860         default:
 861                 break;
 862         }
 863
 864         err = snd_wss_create(card, port, -1, irq, dma1, dma2,
 865                              codec_type, WSS_HWSHARE_DMA1, &chip);
 866         if (!err) {
 867                 unsigned long flags;
 868
 869                 if (sscape->type != SSCAPE_VIVO) {
 870                         /*
 871                          * The input clock frequency on the SoundScape must
 872                          * be 14.31818 MHz, because we must set this register
 873                          * to get the playback to sound correct ...
 874                          */
 875                         snd_wss_mce_up(chip);
 876                         spin_lock_irqsave(&chip->reg_lock, flags);
 877                         snd_wss_out(chip, AD1845_CLOCK, 0x20);
 878                         spin_unlock_irqrestore(&chip->reg_lock, flags);
 879                         snd_wss_mce_down(chip);
 880
 881                 }
 882
 883                 err = snd_wss_pcm(chip, 0);
 884                 if (err < 0) {
 885                         snd_printk(KERN_ERR "sscape: No PCM device "
 886                                             "for AD1845 chip\n");
 887                         goto _error;
 888                 }
 889
 890                 err = snd_wss_mixer(chip);
 891                 if (err < 0) {
 892                         snd_printk(KERN_ERR "sscape: No mixer device "
 893                                             "for AD1845 chip\n");
 894                         goto _error;
 895                 }
 896                 if (chip->hardware != WSS_HW_AD1848) {
 897                         err = snd_wss_timer(chip, 0);
 898                         if (err < 0) {
 899                                 snd_printk(KERN_ERR "sscape: No timer device "
 900                                                     "for AD1845 chip\n");
 901                                 goto _error;
 902                         }
 903                 }
 904
 905                 if (sscape->type != SSCAPE_VIVO) {
 906                         err = snd_ctl_add(card,
 907                                           snd_ctl_new1(&midi_mixer_ctl, chip));
 908                         if (err < 0) {
 909                                 snd_printk(KERN_ERR "sscape: Could not create "
 910                                                     "MIDI mixer control\n");
 911                                 goto _error;
 912                         }
 913                 }
 914
 915                 sscape->chip = chip;
 916         }
 917
 918 _error:
 919         return err;
 920 }
 921
 922
 923 /*
 924  * Create an ALSA soundcard entry for the SoundScape, using
 925  * the given list of port, IRQ and DMA resources.
 926  */
 927 static int create_sscape(int dev, struct snd_card *card)
 928 {
 929         struct soundscape *sscape = get_card_soundscape(card);
 930         unsigned dma_cfg;
 931         unsigned irq_cfg;
 932         unsigned mpu_irq_cfg;
 933         struct resource *io_res;
 934         struct resource *wss_res;
 935         unsigned long flags;
 936         int err;
 937         int val;
 938         const char *name;
 939
 940         /*
 941          * Grab IO ports that we will need to probe so that we
 942          * can detect and control this hardware ...
 943          */
 944         io_res = request_region(port[dev], 8, "SoundScape");
 945         if (!io_res) {
 946                 snd_printk(KERN_ERR
 947                            "sscape: can't grab port 0x%lx\n", port[dev]);
 948                 return -EBUSY;
 949         }
 950         wss_res = NULL;
 951         if (sscape->type == SSCAPE_VIVO) {
 952                 wss_res = request_region(wss_port[dev], 4, "SoundScape");
 953                 if (!wss_res) {
 954                         snd_printk(KERN_ERR "sscape: can't grab port 0x%lx\n",
 955                                             wss_port[dev]);
 956                         err = -EBUSY;
 957                         goto _release_region;
 958                 }
 959         }
 960
 961         /*
 962          * Grab one DMA channel ...
 963          */
 964         err = request_dma(dma[dev], "SoundScape");
 965         if (err < 0) {
 966                 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
 967                 goto _release_region;
 968         }
 969
 970         spin_lock_init(&sscape->lock);
 971         sscape->io_res = io_res;
 972         sscape->wss_res = wss_res;
 973         sscape->io_base = port[dev];
 974
 975         if (!detect_sscape(sscape, wss_port[dev])) {
 976                 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
 977                         sscape->io_base);
 978                 err = -ENODEV;
 979                 goto _release_dma;
 980         }
 981
 982         switch (sscape->type) {
 983         case MEDIA_FX:
 984                 name = "MediaFX/SoundFX";
 985                 break;
 986         case SSCAPE:
 987                 name = "Soundscape";
 988                 break;
 989         case SSCAPE_PNP:
 990                 name = "Soundscape PnP";
 991                 break;
 992         case SSCAPE_VIVO:
 993                 name = "Soundscape VIVO";
 994                 break;
 995         default:
 996                 name = "unknown Soundscape";
 997                 break;
 998         }
 999
1000         printk(KERN_INFO "sscape: %s card detected at 0x%x, using IRQ %d, DMA %d\n",
1001                          name, sscape->io_base, irq[dev], dma[dev]);
1002
1003         /*
1004          * Check that the user didn't pass us garbage data ...
1005          */
1006         irq_cfg = get_irq_config(sscape->type, irq[dev]);
1007         if (irq_cfg == INVALID_IRQ) {
1008                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
1009                 err = -ENXIO;
1010                 goto _release_dma;
1011         }
1012
1013         mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
1014         if (mpu_irq_cfg == INVALID_IRQ) {
1015                 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
1016                 err = -ENXIO;
1017                 goto _release_dma;
1018         }
1019
1020         /*
1021          * Tell the on-board devices where their resources are (I think -
1022          * I can't be sure without a datasheet ... So many magic values!)
1023          */
1024         spin_lock_irqsave(&sscape->lock, flags);
1025
1026         sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1027         sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1028
1029         /*
1030          * Enable and configure the DMA channels ...
1031          */
1032         sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1033         dma_cfg = (sscape->ic_type == IC_OPUS ? 0x40 : 0x70);
1034         sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1035         sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1036
1037         mpu_irq_cfg |= mpu_irq_cfg << 2;
1038         val = sscape_read_unsafe(sscape->io_base, GA_HMCTL_REG) & 0xF7;
1039         if (joystick[dev])
1040                 val |= 8;
1041         sscape_write_unsafe(sscape->io_base, GA_HMCTL_REG, val | 0x10);
1042         sscape_write_unsafe(sscape->io_base, GA_INTCFG_REG, 0xf0 | mpu_irq_cfg);
1043         sscape_write_unsafe(sscape->io_base,
1044                             GA_CDCFG_REG, 0x09 | DMA_8BIT
1045                             | (dma[dev] << 4) | (irq_cfg << 1));
1046         /*
1047          * Enable the master IRQ ...
1048          */
1049         sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x80);
1050
1051         spin_unlock_irqrestore(&sscape->lock, flags);
1052
1053         /*
1054          * We have now enabled the codec chip, and so we should
1055          * detect the AD1845 device ...
1056          */
1057         err = create_ad1845(card, wss_port[dev], irq[dev],
1058                             dma[dev], dma2[dev]);
1059         if (err < 0) {
1060                 snd_printk(KERN_ERR
1061                                 "sscape: No AD1845 device at 0x%lx, IRQ %d\n",
1062                                 wss_port[dev], irq[dev]);
1063                 goto _release_dma;
1064         }
1065         strcpy(card->driver, "SoundScape");
1066         strcpy(card->shortname, name);
1067         snprintf(card->longname, sizeof(card->longname),
1068                  "%s at 0x%lx, IRQ %d, DMA1 %d, DMA2 %d\n",
1069                  name, sscape->chip->port, sscape->chip->irq,
1070                  sscape->chip->dma1, sscape->chip->dma2);
1071
1072 #define MIDI_DEVNUM  0
1073         if (sscape->type != SSCAPE_VIVO) {
1074                 err = sscape_upload_bootblock(card);
1075                 if (err >= 0)
1076                         err = sscape_upload_microcode(card, err);
1077
1078                 if (err == 0) {
1079                         err = create_mpu401(card, MIDI_DEVNUM, port[dev],
1080                                             mpu_irq[dev]);
1081                         if (err < 0) {
1082                                 snd_printk(KERN_ERR "sscape: Failed to create "
1083                                                 "MPU-401 device at 0x%lx\n",
1084                                                 port[dev]);
1085                                 goto _release_dma;
1086                         }
1087
1088                         /*
1089                          * Initialize mixer
1090                          */
1091                         spin_lock_irqsave(&sscape->lock, flags);
1092                         sscape->midi_vol = 0;
1093                         host_write_ctrl_unsafe(sscape->io_base,
1094                                                 CMD_SET_MIDI_VOL, 100);
1095                         host_write_ctrl_unsafe(sscape->io_base,
1096                                                 sscape->midi_vol, 100);
1097                         host_write_ctrl_unsafe(sscape->io_base,
1098                                                 CMD_XXX_MIDI_VOL, 100);
1099                         host_write_ctrl_unsafe(sscape->io_base,
1100                                                 sscape->midi_vol, 100);
1101                         host_write_ctrl_unsafe(sscape->io_base,
1102                                                 CMD_SET_EXTMIDI, 100);
1103                         host_write_ctrl_unsafe(sscape->io_base,
1104                                                 0, 100);
1105                         host_write_ctrl_unsafe(sscape->io_base, CMD_ACK, 100);
1106
1107                         set_midi_mode_unsafe(sscape->io_base);
1108                         spin_unlock_irqrestore(&sscape->lock, flags);
1109                 }
1110         }
1111
1112         /*
1113          * Now that we have successfully created this sound card,
1114          * it is safe to store the pointer.
1115          * NOTE: we only register the sound card's "destructor"
1116          *       function now that our "constructor" has completed.
1117          */
1118         card->private_free = soundscape_free;
1119
1120         return 0;
1121
1122 _release_dma:
1123         free_dma(dma[dev]);
1124
1125 _release_region:
1126         release_and_free_resource(wss_res);
1127         release_and_free_resource(io_res);
1128
1129         return err;
1130 }
1131
1132
1133 static int snd_sscape_match(struct device *pdev, unsigned int i)
1134 {
1135         /*
1136          * Make sure we were given ALL of the other parameters.
1137          */
1138         if (port[i] == SNDRV_AUTO_PORT)
1139                 return 0;
1140
1141         if (irq[i] == SNDRV_AUTO_IRQ ||
1142             mpu_irq[i] == SNDRV_AUTO_IRQ ||
1143             dma[i] == SNDRV_AUTO_DMA) {
1144                 printk(KERN_INFO
1145                        "sscape: insufficient parameters, "
1146                        "need IO, IRQ, MPU-IRQ and DMA\n");
1147                 return 0;
1148         }
1149
1150         return 1;
1151 }
1152
1153 static int snd_sscape_probe(struct device *pdev, unsigned int dev)
1154 {
1155         struct snd_card *card;
1156         struct soundscape *sscape;
1157         int ret;
1158
1159         ret = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
1160                            sizeof(struct soundscape), &card);
1161         if (ret < 0)
1162                 return ret;
1163
1164         sscape = get_card_soundscape(card);
1165         sscape->type = SSCAPE;
1166
1167         dma[dev] &= 0x03;
1168
1169         ret = create_sscape(dev, card);
1170         if (ret < 0)
1171                 goto _release_card;
1172
1173         ret = snd_card_register(card);
1174         if (ret < 0) {
1175                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1176                 goto _release_card;
1177         }
1178         dev_set_drvdata(pdev, card);
1179         return 0;
1180
1181 _release_card:
1182         snd_card_free(card);
1183         return ret;
1184 }
1185
1186 static int snd_sscape_remove(struct device *devptr, unsigned int dev)
1187 {
1188         snd_card_free(dev_get_drvdata(devptr));
1189         return 0;
1190 }
1191
1192 #define DEV_NAME "sscape"
1193
1194 static struct isa_driver snd_sscape_driver = {
1195         .match          = snd_sscape_match,
1196         .probe          = snd_sscape_probe,
1197         .remove         = snd_sscape_remove,
1198         /* FIXME: suspend/resume */
1199         .driver         = {
1200                 .name   = DEV_NAME
1201         },
1202 };
1203
1204 #ifdef CONFIG_PNP
1205 static inline int get_next_autoindex(int i)
1206 {
1207         while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
1208                 ++i;
1209         return i;
1210 }
1211
1212
1213 static int sscape_pnp_detect(struct pnp_card_link *pcard,
1214                              const struct pnp_card_device_id *pid)
1215 {
1216         static int idx = 0;
1217         struct pnp_dev *dev;
1218         struct snd_card *card;
1219         struct soundscape *sscape;
1220         int ret;
1221
1222         /*
1223          * Allow this function to fail *quietly* if all the ISA PnP
1224          * devices were configured using module parameters instead.
1225          */
1226         idx = get_next_autoindex(idx);
1227         if (idx >= SNDRV_CARDS)
1228                 return -ENOSPC;
1229
1230         /*
1231          * Check that we still have room for another sound card ...
1232          */
1233         dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1234         if (!dev)
1235                 return -ENODEV;
1236
1237         if (!pnp_is_active(dev)) {
1238                 if (pnp_activate_dev(dev) < 0) {
1239                         snd_printk(KERN_INFO "sscape: device is inactive\n");
1240                         return -EBUSY;
1241                 }
1242         }
1243
1244         /*
1245          * Create a new ALSA sound card entry, in anticipation
1246          * of detecting our hardware ...
1247          */
1248         ret = snd_card_new(&pcard->card->dev,
1249                            index[idx], id[idx], THIS_MODULE,
1250                            sizeof(struct soundscape), &card);
1251         if (ret < 0)
1252                 return ret;
1253
1254         sscape = get_card_soundscape(card);
1255
1256         /*
1257          * Identify card model ...
1258          */
1259         if (!strncmp("ENS4081", pid->id, 7))
1260                 sscape->type = SSCAPE_VIVO;
1261         else
1262                 sscape->type = SSCAPE_PNP;
1263
1264         /*
1265          * Read the correct parameters off the ISA PnP bus ...
1266          */
1267         port[idx] = pnp_port_start(dev, 0);
1268         irq[idx] = pnp_irq(dev, 0);
1269         mpu_irq[idx] = pnp_irq(dev, 1);
1270         dma[idx] = pnp_dma(dev, 0) & 0x03;
1271         if (sscape->type == SSCAPE_PNP) {
1272                 dma2[idx] = dma[idx];
1273                 wss_port[idx] = CODEC_IO(port[idx]);
1274         } else {
1275                 wss_port[idx] = pnp_port_start(dev, 1);
1276                 dma2[idx] = pnp_dma(dev, 1);
1277         }
1278
1279         ret = create_sscape(idx, card);
1280         if (ret < 0)
1281                 goto _release_card;
1282
1283         ret = snd_card_register(card);
1284         if (ret < 0) {
1285                 snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1286                 goto _release_card;
1287         }
1288
1289         pnp_set_card_drvdata(pcard, card);
1290         ++idx;
1291         return 0;
1292
1293 _release_card:
1294         snd_card_free(card);
1295         return ret;
1296 }
1297
1298 static void sscape_pnp_remove(struct pnp_card_link *pcard)
1299 {
1300         snd_card_free(pnp_get_card_drvdata(pcard));
1301         pnp_set_card_drvdata(pcard, NULL);
1302 }
1303
1304 static struct pnp_card_driver sscape_pnpc_driver = {
1305         .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1306         .name = "sscape",
1307         .id_table = sscape_pnpids,
1308         .probe = sscape_pnp_detect,
1309         .remove = sscape_pnp_remove,
1310 };
1311
1312 #endif /* CONFIG_PNP */
1313
1314 static int __init sscape_init(void)
1315 {
1316         int err;
1317
1318         err = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS);
1319 #ifdef CONFIG_PNP
1320         if (!err)
1321                 isa_registered = 1;
1322
1323         err = pnp_register_card_driver(&sscape_pnpc_driver);
1324         if (!err)
1325                 pnp_registered = 1;
1326
1327         if (isa_registered)
1328                 err = 0;
1329 #endif
1330         return err;
1331 }
1332
1333 static void __exit sscape_exit(void)
1334 {
1335 #ifdef CONFIG_PNP
1336         if (pnp_registered)
1337                 pnp_unregister_card_driver(&sscape_pnpc_driver);
1338         if (isa_registered)
1339 #endif
1340                 isa_unregister_driver(&snd_sscape_driver);
1341 }
1342
1343 module_init(sscape_init);
1344 module_exit(sscape_exit);