sound/oss/aci.c

   1 /*
   2  * Audio Command Interface (ACI) driver (sound/aci.c)
   3  *
   4  * ACI is a protocol used to communicate with the microcontroller on
   5  * some sound cards produced by miro, e.g. the miroSOUND PCM12 and
   6  * PCM20. The ACI has been developed for miro by Norberto Pellicci
   7  * <pellicci@home.com>. Special thanks to both him and miro for
   8  * providing the ACI specification.
   9  *
  10  * The main function of the ACI is to control the mixer and to get a
  11  * product identification. On the PCM20, ACI also controls the radio
  12  * tuner on this card, this is supported in the Video for Linux
  13  * miropcm20 driver.
  14  * -
  15  * This is a fullfeatured implementation. Unsupported features
  16  * are bugs... (:
  17  *
  18  * It is not longer necessary to load the mad16 module first. The
  19  * user is currently responsible to set the mad16 mixer correctly.
  20  *
  21  * To toggle the solo mode for full duplex operation just use the OSS
  22  * record switch for the pcm ('wave') controller.           Robert
  23  * -
  24  *
  25  * Revision history:
  26  *
  27  *   1995-11-10  Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
  28  *        First version written.
  29  *   1995-12-31  Markus Kuhn
  30  *        Second revision, general code cleanup.
  31  *   1996-05-16  Hannu Savolainen
  32  *        Integrated with other parts of the driver.
  33  *   1996-05-28  Markus Kuhn
  34  *        Initialize CS4231A mixer, make ACI first mixer,
  35  *        use new private mixer API for solo mode.
  36  *   1998-08-18  Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
  37  *        Small modification to export ACI functions and
  38  *        complete modularisation.
  39  *   2000-06-20  Robert Siemer <Robert.Siemer@gmx.de>
  40  *        Don't initialize the CS4231A mixer anymore, so the code is
  41  *        working again, and other small changes to fit in todays
  42  *        kernels.
  43  *   2000-08-26  Robert Siemer
  44  *        Clean up and rewrite for 2.4.x. Maybe it's SMP safe now... (:
  45  *        ioctl bugfix, and integration of solo-mode into OSS-API,
  46  *        added (OSS-limited) equalizer support, return value bugfix,
  47  *        changed param aci_reset to reset, new params: ide, wss.
  48  *   2001-04-20  Robert Siemer
  49  *        even more cleanups...
  50  *   2001-10-08  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  51  *        Get rid of check_region, .bss optimizations, use set_current_state
  52  */
  53
  54 #include <linux/kernel.h>
  55 #include <linux/init.h>
  56 #include <linux/module.h>
  57 #include <linux/proc_fs.h>
  58 #include <linux/slab.h>
  59 #include <asm/semaphore.h>
  60 #include <asm/io.h>
  61 #include <asm/uaccess.h>
  62 #include "sound_config.h"
  63
  64 int aci_port;   /* as determined by bit 4 in the OPTi 929 MC4 register */
  65 static int aci_idcode[2];       /* manufacturer and product ID */
  66 int aci_version;        /* ACI firmware version */
  67
  68 EXPORT_SYMBOL(aci_port);
  69 EXPORT_SYMBOL(aci_version);
  70
  71 #include "aci.h"
  72
  73
  74 static int aci_solo;    /* status bit of the card that can't be         *
  75                          * checked with ACI versions prior to 0xb0      */
  76 static int aci_amp;   /* status bit for power-amp/line-out level
  77                            but I have no docs about what is what... */
  78 static int aci_micpreamp=3; /* microphone preamp-level that can't be    *
  79                          * checked with ACI versions prior to 0xb0      */
  80
  81 static int mixer_device;
  82 static struct semaphore aci_sem;
  83
  84 #ifdef MODULE
  85 static int reset;
  86 module_param(reset, bool, 0);
  87 MODULE_PARM_DESC(reset,"When set to 1, reset aci mixer.");
  88 #else
  89 static int reset = 1;
  90 #endif
  91
  92 static int ide=-1;
  93 module_param(ide, int, 0);
  94 MODULE_PARM_DESC(ide,"1 enable, 0 disable ide-port - untested"
  95                  " default: do nothing");
  96 static int wss=-1;
  97 module_param(wss, int, 0);
  98 MODULE_PARM_DESC(wss,"change between ACI/WSS-mixer; use 0 and 1 - untested"
  99                  " default: do nothing; for PCM1-pro only");
 100
 101 #ifdef DEBUG
 102 static void print_bits(unsigned char c)
 103 {
 104         int j;
 105         printk(KERN_DEBUG "aci: ");
 106
 107         for (j=7; j>=0; j--) {
 108                 printk("%d", (c >> j) & 0x1);
 109         }
 110
 111         printk("\n");
 112 }
 113 #endif
 114
 115 /*
 116  * This busy wait code normally requires less than 15 loops and
 117  * practically always less than 100 loops on my i486/DX2 66 MHz.
 118  *
 119  * Warning: Waiting on the general status flag after reseting the MUTE
 120  * function can take a VERY long time, because the PCM12 does some kind
 121  * of fade-in effect. For this reason, access to the MUTE function has
 122  * not been implemented at all.
 123  *
 124  * - The OSS interface has no mute option. It takes about 3 seconds to
 125  * fade-in on my PCM20. busy_wait() handles it great now...     Robert
 126  */
 127
 128 static int busy_wait(void)
 129 {
 130         #define MINTIME 500
 131         long timeout;
 132         unsigned char byte;
 133
 134         for (timeout = 1; timeout <= MINTIME+30; timeout++) {
 135                 if (((byte=inb(BUSY_REGISTER)) & 1) == 0) {
 136                         if (timeout >= MINTIME)
 137                                 printk(KERN_DEBUG "aci: Got READYFLAG in round %ld.\n", timeout-MINTIME);
 138                         return byte;
 139                 }
 140                 if (timeout >= MINTIME) {
 141                         long out=10*HZ;
 142                         switch (timeout-MINTIME) {
 143                         case 0 ... 9:
 144                                 out /= 10;
 145                         case 10 ... 19:
 146                                 out /= 10;
 147                         case 20 ... 30:
 148                                 out /= 10;
 149                         default:
 150                                 set_current_state(TASK_UNINTERRUPTIBLE);
 151                                 schedule_timeout(out);
 152                                 break;
 153                         }
 154                 }
 155         }
 156         printk(KERN_WARNING "aci: busy_wait() time out.\n");
 157         return -EBUSY;
 158 }
 159
 160 /* The four ACI command types are fucked up. [-:
 161  * implied is: 1w      - special case for INIT
 162  * write   is: 2w1r
 163  * read    is: x(1w1r) where x is 1 or 2 (1 CHECK_SIG, 1 CHECK_STER,
 164  *                                        1 VERSION, 2 IDCODE)
 165  *  the command is only in the first write, rest is protocol overhead
 166  *
 167  * indexed is technically a write and used for STATUS
 168  * and the special case for TUNE is: 3w1r
 169  *
 170  * Here the new general sheme: TUNE --> aci_rw_cmd(x,  y,  z)
 171  *                indexed and write --> aci_rw_cmd(x,  y, -1)
 172  *           implied and read (x=1) --> aci_rw_cmd(x, -1, -1)
 173  *
 174  * Read (x>=2) is not implemented (only used during initialization).
 175  * Use aci_idcode[2] and aci_version...                    Robert
 176  */
 177
 178 /* Some notes for error detection: theoretically it is possible.
 179  * But it doubles the I/O-traffic from ww(r) to wwwrw(r) in the normal
 180  * case and doesn't seem to be designed for that...        Robert
 181  */
 182
 183 static inline int aci_rawwrite(unsigned char byte)
 184 {
 185         if (busy_wait() >= 0) {
 186 #ifdef DEBUG
 187                 printk(KERN_DEBUG "aci_rawwrite(%d)\n", byte);
 188 #endif
 189                 outb(byte, COMMAND_REGISTER);
 190                 return 0;
 191         } else
 192                 return -EBUSY;
 193 }
 194
 195 static inline int aci_rawread(void)
 196 {
 197         unsigned char byte;
 198
 199         if (busy_wait() >= 0) {
 200                 byte=inb(STATUS_REGISTER);
 201 #ifdef DEBUG
 202                 printk(KERN_DEBUG "%d = aci_rawread()\n", byte);
 203 #endif
 204                 return byte;
 205         } else
 206                 return -EBUSY;
 207 }
 208
 209
 210 int aci_rw_cmd(int write1, int write2, int write3)
 211 {
 212         int write[] = {write1, write2, write3};
 213         int read = -EINTR, i;
 214
 215         if (down_interruptible(&aci_sem))
 216                 goto out;
 217
 218         for (i=0; i<3; i++) {
 219                 if (write[i]< 0 || write[i] > 255)
 220                         break;
 221                 else {
 222                         read = aci_rawwrite(write[i]);
 223                         if (read < 0)
 224                                 goto out_up;
 225                 }
 226
 227         }
 228
 229         read = aci_rawread();
 230 out_up: up(&aci_sem);
 231 out:    return read;
 232 }
 233
 234 EXPORT_SYMBOL(aci_rw_cmd);
 235
 236 static int setvolume(int __user *arg,
 237                      unsigned char left_index, unsigned char right_index)
 238 {
 239         int vol, ret, uservol, buf;
 240
 241         __get_user(uservol, arg);
 242
 243         /* left channel */
 244         vol = uservol & 0xff;
 245         if (vol > 100)
 246                 vol = 100;
 247         vol = SCALE(100, 0x20, vol);
 248         if ((buf=aci_write_cmd(left_index, 0x20 - vol))<0)
 249                 return buf;
 250         ret = SCALE(0x20, 100, vol);
 251
 252
 253         /* right channel */
 254         vol = (uservol >> 8) & 0xff;
 255         if (vol > 100)
 256                 vol = 100;
 257         vol = SCALE(100, 0x20, vol);
 258         if ((buf=aci_write_cmd(right_index, 0x20 - vol))<0)
 259                 return buf;
 260         ret |= SCALE(0x20, 100, vol) << 8;
 261
 262         __put_user(ret, arg);
 263
 264         return 0;
 265 }
 266
 267 static int getvolume(int __user *arg,
 268                      unsigned char left_index, unsigned char right_index)
 269 {
 270         int vol;
 271         int buf;
 272
 273         /* left channel */
 274         if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
 275                 return buf;
 276         vol = SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0);
 277
 278         /* right channel */
 279         if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
 280                 return buf;
 281         vol |= SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0) << 8;
 282
 283         __put_user(vol, arg);
 284
 285         return 0;
 286 }
 287
 288
 289 /* The equalizer is somewhat strange on the ACI. From -12dB to +12dB
 290  * write:  0xff..down.to..0x80==0x00..up.to..0x7f
 291  */
 292
 293 static inline unsigned int eq_oss2aci(unsigned int vol)
 294 {
 295         int boost=0;
 296         unsigned int ret;
 297
 298         if (vol > 100)
 299                 vol = 100;
 300         if (vol > 50) {
 301                 vol -= 51;
 302                 boost=1;
 303         }
 304         if (boost)
 305                 ret=SCALE(49, 0x7e, vol)+1;
 306         else
 307                 ret=0xff - SCALE(50, 0x7f, vol);
 308         return ret;
 309 }
 310
 311 static inline unsigned int eq_aci2oss(unsigned int vol)
 312 {
 313         if (vol < 0x80)
 314                 return SCALE(0x7f, 50, vol) + 50;
 315         else
 316                 return SCALE(0x7f, 50, 0xff-vol);
 317 }
 318
 319
 320 static int setequalizer(int __user *arg,
 321                         unsigned char left_index, unsigned char right_index)
 322 {
 323         int buf;
 324         unsigned int vol;
 325
 326         __get_user(vol, arg);
 327
 328         /* left channel */
 329         if ((buf=aci_write_cmd(left_index, eq_oss2aci(vol & 0xff)))<0)
 330                 return buf;
 331
 332         /* right channel */
 333         if ((buf=aci_write_cmd(right_index, eq_oss2aci((vol>>8) & 0xff)))<0)
 334                 return buf;
 335
 336         /* the ACI equalizer is more precise */
 337         return 0;
 338 }
 339
 340 static int getequalizer(int __user *arg,
 341                         unsigned char left_index, unsigned char right_index)
 342 {
 343         int buf;
 344         unsigned int vol;
 345
 346         /* left channel */
 347         if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
 348                 return buf;
 349         vol = eq_aci2oss(buf);
 350
 351         /* right channel */
 352         if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
 353                 return buf;
 354         vol |= eq_aci2oss(buf) << 8;
 355
 356         __put_user(vol, arg);
 357
 358         return 0;
 359 }
 360
 361 static int aci_mixer_ioctl (int dev, unsigned int cmd, void __user * arg)
 362 {
 363         int vol, buf;
 364         int __user *p = arg;
 365
 366         switch (cmd) {
 367         case SOUND_MIXER_WRITE_VOLUME:
 368                 return setvolume(p, 0x01, 0x00);
 369         case SOUND_MIXER_WRITE_CD:
 370                 return setvolume(p, 0x3c, 0x34);
 371         case SOUND_MIXER_WRITE_MIC:
 372                 return setvolume(p, 0x38, 0x30);
 373         case SOUND_MIXER_WRITE_LINE:
 374                 return setvolume(p, 0x39, 0x31);
 375         case SOUND_MIXER_WRITE_SYNTH:
 376                 return setvolume(p, 0x3b, 0x33);
 377         case SOUND_MIXER_WRITE_PCM:
 378                 return setvolume(p, 0x3a, 0x32);
 379         case MIXER_WRITE(SOUND_MIXER_RADIO): /* fall through */
 380         case SOUND_MIXER_WRITE_LINE1:  /* AUX1 or radio */
 381                 return setvolume(p, 0x3d, 0x35);
 382         case SOUND_MIXER_WRITE_LINE2:  /* AUX2 */
 383                 return setvolume(p, 0x3e, 0x36);
 384         case SOUND_MIXER_WRITE_BASS:   /* set band one and two */
 385                 if (aci_idcode[1]=='C') {
 386                         if ((buf=setequalizer(p, 0x48, 0x40)) ||
 387                             (buf=setequalizer(p, 0x49, 0x41)));
 388                         return buf;
 389                 }
 390                 break;
 391         case SOUND_MIXER_WRITE_TREBLE: /* set band six and seven */
 392                 if (aci_idcode[1]=='C') {
 393                         if ((buf=setequalizer(p, 0x4d, 0x45)) ||
 394                             (buf=setequalizer(p, 0x4e, 0x46)));
 395                         return buf;
 396                 }
 397                 break;
 398         case SOUND_MIXER_WRITE_IGAIN:  /* MIC pre-amp */
 399                 if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
 400                         __get_user(vol, p);
 401                         vol = vol & 0xff;
 402                         if (vol > 100)
 403                                 vol = 100;
 404                         vol = SCALE(100, 3, vol);
 405                         if ((buf=aci_write_cmd(ACI_WRITE_IGAIN, vol))<0)
 406                                 return buf;
 407                         aci_micpreamp = vol;
 408                         vol = SCALE(3, 100, vol);
 409                         vol |= (vol << 8);
 410                         __put_user(vol, p);
 411                         return 0;
 412                 }
 413                 break;
 414         case SOUND_MIXER_WRITE_OGAIN:  /* Power-amp/line-out level */
 415                 if (aci_idcode[1]=='A' || aci_idcode[1]=='B') {
 416                         __get_user(buf, p);
 417                         buf = buf & 0xff;
 418                         if (buf > 50)
 419                                 vol = 1;
 420                         else
 421                                 vol = 0;
 422                         if ((buf=aci_write_cmd(ACI_SET_POWERAMP, vol))<0)
 423                                 return buf;
 424                         aci_amp = vol;
 425                         if (aci_amp)
 426                                 buf = (100 || 100<<8);
 427                         else
 428                                 buf = 0;
 429                         __put_user(buf, p);
 430                         return 0;
 431                 }
 432                 break;
 433         case SOUND_MIXER_WRITE_RECSRC:
 434                 /* handle solo mode control */
 435                 __get_user(buf, p);
 436                 /* unset solo when RECSRC for PCM is requested */
 437                 if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
 438                         vol = !(buf & SOUND_MASK_PCM);
 439                         if ((buf=aci_write_cmd(ACI_SET_SOLOMODE, vol))<0)
 440                                 return buf;
 441                         aci_solo = vol;
 442                 }
 443                 buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
 444                        SOUND_MASK_SYNTH| SOUND_MASK_LINE2);
 445                 if (aci_idcode[1] == 'C') /* PCM20 radio */
 446                         buf |= SOUND_MASK_RADIO;
 447                 else
 448                         buf |= SOUND_MASK_LINE1;
 449                 if (!aci_solo)
 450                         buf |= SOUND_MASK_PCM;
 451                 __put_user(buf, p);
 452                 return 0;
 453         case SOUND_MIXER_READ_DEVMASK:
 454                 buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD    |
 455                        SOUND_MASK_MIC    | SOUND_MASK_LINE  |
 456                        SOUND_MASK_SYNTH  | SOUND_MASK_PCM   |
 457                        SOUND_MASK_LINE2);
 458                 switch (aci_idcode[1]) {
 459                 case 'C': /* PCM20 radio */
 460                         buf |= (SOUND_MASK_RADIO | SOUND_MASK_IGAIN |
 461                                 SOUND_MASK_BASS  | SOUND_MASK_TREBLE);
 462                         break;
 463                 case 'B': /* PCM12 */
 464                         buf |= (SOUND_MASK_LINE1 | SOUND_MASK_IGAIN |
 465                                 SOUND_MASK_OGAIN);
 466                         break;
 467                 case 'A': /* PCM1-pro */
 468                         buf |= (SOUND_MASK_LINE1 | SOUND_MASK_OGAIN);
 469                         break;
 470                 default:
 471                         buf |= SOUND_MASK_LINE1;
 472                 }
 473                 __put_user(buf, p);
 474                 return 0;
 475         case SOUND_MIXER_READ_STEREODEVS:
 476                 buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD    |
 477                        SOUND_MASK_MIC    | SOUND_MASK_LINE  |
 478                        SOUND_MASK_SYNTH  | SOUND_MASK_PCM   |
 479                        SOUND_MASK_LINE2);
 480                 switch (aci_idcode[1]) {
 481                 case 'C': /* PCM20 radio */
 482                         buf |= (SOUND_MASK_RADIO |
 483                                 SOUND_MASK_BASS  | SOUND_MASK_TREBLE);
 484                         break;
 485                 default:
 486                         buf |= SOUND_MASK_LINE1;
 487                 }
 488                 __put_user(buf, p);
 489                 return 0;
 490         case SOUND_MIXER_READ_RECMASK:
 491                 buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
 492                        SOUND_MASK_SYNTH| SOUND_MASK_LINE2| SOUND_MASK_PCM);
 493                 if (aci_idcode[1] == 'C') /* PCM20 radio */
 494                         buf |= SOUND_MASK_RADIO;
 495                 else
 496                         buf |= SOUND_MASK_LINE1;
 497
 498                 __put_user(buf, p);
 499                 return 0;
 500         case SOUND_MIXER_READ_RECSRC:
 501                 buf = (SOUND_MASK_CD    | SOUND_MASK_MIC   | SOUND_MASK_LINE  |
 502                        SOUND_MASK_SYNTH | SOUND_MASK_LINE2);
 503                 /* do we need aci_solo or can I get it from the ACI? */
 504                 switch (aci_idcode[1]) {
 505                 case 'B': /* PCM12 */
 506                 case 'C': /* PCM20 radio */
 507                         if (aci_version >= 0xb0) {
 508                                 if ((vol=aci_rw_cmd(ACI_STATUS,
 509                                                     ACI_S_GENERAL, -1))<0)
 510                                         return vol;
 511                                 if (vol & 0x20)
 512                                         buf |= SOUND_MASK_PCM;
 513                         }
 514                         else
 515                                 if (!aci_solo)
 516                                         buf |= SOUND_MASK_PCM;
 517                         break;
 518                 default:
 519                         buf |= SOUND_MASK_PCM;
 520                 }
 521                 if (aci_idcode[1] == 'C') /* PCM20 radio */
 522                         buf |= SOUND_MASK_RADIO;
 523                 else
 524                         buf |= SOUND_MASK_LINE1;
 525
 526                 __put_user(buf, p);
 527                 return 0;
 528         case SOUND_MIXER_READ_CAPS:
 529                 __put_user(0, p);
 530                 return 0;
 531         case SOUND_MIXER_READ_VOLUME:
 532                 return getvolume(p, 0x04, 0x03);
 533         case SOUND_MIXER_READ_CD:
 534                 return getvolume(p, 0x0a, 0x09);
 535         case SOUND_MIXER_READ_MIC:
 536                 return getvolume(p, 0x06, 0x05);
 537         case SOUND_MIXER_READ_LINE:
 538                 return getvolume(p, 0x08, 0x07);
 539         case SOUND_MIXER_READ_SYNTH:
 540                 return getvolume(p, 0x0c, 0x0b);
 541         case SOUND_MIXER_READ_PCM:
 542                 return getvolume(p, 0x0e, 0x0d);
 543         case MIXER_READ(SOUND_MIXER_RADIO): /* fall through */
 544         case SOUND_MIXER_READ_LINE1:  /* AUX1 */
 545                 return getvolume(p, 0x11, 0x10);
 546         case SOUND_MIXER_READ_LINE2:  /* AUX2 */
 547                 return getvolume(p, 0x13, 0x12);
 548         case SOUND_MIXER_READ_BASS:   /* get band one */
 549                 if (aci_idcode[1]=='C') {
 550                         return getequalizer(p, 0x23, 0x22);
 551                 }
 552                 break;
 553         case SOUND_MIXER_READ_TREBLE: /* get band seven */
 554                 if (aci_idcode[1]=='C') {
 555                         return getequalizer(p, 0x2f, 0x2e);
 556                 }
 557                 break;
 558         case SOUND_MIXER_READ_IGAIN:  /* MIC pre-amp */
 559                 if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
 560                         /* aci_micpreamp or ACI? */
 561                         if (aci_version >= 0xb0) {
 562                                 if ((buf=aci_indexed_cmd(ACI_STATUS,
 563                                                          ACI_S_READ_IGAIN))<0)
 564                                         return buf;
 565                         }
 566                         else
 567                                 buf=aci_micpreamp;
 568                         vol = SCALE(3, 100, buf <= 3 ? buf : 3);
 569                         vol |= vol << 8;
 570                         __put_user(vol, p);
 571                         return 0;
 572                 }
 573                 break;
 574         case SOUND_MIXER_READ_OGAIN:
 575                 if (aci_amp)
 576                         buf = (100 || 100<<8);
 577                 else
 578                         buf = 0;
 579                 __put_user(buf, p);
 580                 return 0;
 581         }
 582         return -EINVAL;
 583 }
 584
 585 static struct mixer_operations aci_mixer_operations =
 586 {
 587         .owner = THIS_MODULE,
 588         .id    = "ACI",
 589         .ioctl = aci_mixer_ioctl
 590 };
 591
 592 /*
 593  * There is also an internal mixer in the codec (CS4231A or AD1845),
 594  * that deserves no purpose in an ACI based system which uses an
 595  * external ACI controlled stereo mixer. Make sure that this codec
 596  * mixer has the AUX1 input selected as the recording source, that the
 597  * input gain is set near maximum and that the other channels going
 598  * from the inputs to the codec output are muted.
 599  */
 600
 601 static int __init attach_aci(void)
 602 {
 603         char *boardname;
 604         int i, rc = -EBUSY;
 605
 606         init_MUTEX(&aci_sem);
 607
 608         outb(0xE3, 0xf8f); /* Write MAD16 password */
 609         aci_port = (inb(0xf90) & 0x10) ?
 610                 0x344: 0x354; /* Get aci_port from MC4_PORT */
 611
 612         if (!request_region(aci_port, 3, "sound mixer (ACI)")) {
 613                 printk(KERN_NOTICE
 614                        "aci: I/O area 0x%03x-0x%03x already used.\n",
 615                        aci_port, aci_port+2);
 616                 goto out;
 617         }
 618
 619         /* force ACI into a known state */
 620         rc = -EFAULT;
 621         for (i=0; i<3; i++)
 622                 if (aci_rw_cmd(ACI_ERROR_OP, -1, -1)<0)
 623                         goto out_release_region;
 624
 625         /* official this is one aci read call: */
 626         rc = -EFAULT;
 627         if ((aci_idcode[0]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0 ||
 628             (aci_idcode[1]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0) {
 629                 printk(KERN_ERR "aci: Failed to read idcode on 0x%03x.\n",
 630                        aci_port);
 631                 goto out_release_region;
 632         }
 633
 634         if ((aci_version=aci_rw_cmd(ACI_READ_VERSION, -1, -1))<0) {
 635                 printk(KERN_ERR "aci: Failed to read version on 0x%03x.\n",
 636                        aci_port);
 637                 goto out_release_region;
 638         }
 639
 640         if (aci_idcode[0] == 'm') {
 641                 /* It looks like a miro sound card. */
 642                 switch (aci_idcode[1]) {
 643                 case 'A':
 644                         boardname = "PCM1 pro / early PCM12";
 645                         break;
 646                 case 'B':
 647                         boardname = "PCM12";
 648                         break;
 649                 case 'C':
 650                         boardname = "PCM20 radio";
 651                         break;
 652                 default:
 653                         boardname = "unknown miro";
 654                 }
 655         } else {
 656                 printk(KERN_WARNING "aci: Warning: unsupported card! - "
 657                        "no hardware, no specs...\n");
 658                 boardname = "unknown Cardinal Technologies";
 659         }
 660
 661         printk(KERN_INFO "<ACI 0x%02x, id %02x/%02x \"%c/%c\", (%s)> at 0x%03x\n",
 662                aci_version,
 663                aci_idcode[0], aci_idcode[1],
 664                aci_idcode[0], aci_idcode[1],
 665                boardname, aci_port);
 666
 667         rc = -EBUSY;
 668         if (reset) {
 669                 /* first write()s after reset fail with my PCM20 */
 670                 if (aci_rw_cmd(ACI_INIT, -1, -1)<0 ||
 671                     aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0 ||
 672                     aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0)
 673                         goto out_release_region;
 674         }
 675
 676         /* the PCM20 is muted after reset (and reboot) */
 677         if (aci_rw_cmd(ACI_SET_MUTE, 0x00, -1)<0)
 678                 goto out_release_region;
 679
 680         if (ide>=0)
 681                 if (aci_rw_cmd(ACI_SET_IDE, !ide, -1)<0)
 682                         goto out_release_region;
 683
 684         if (wss>=0 && aci_idcode[1]=='A')
 685                 if (aci_rw_cmd(ACI_SET_WSS, !!wss, -1)<0)
 686                         goto out_release_region;
 687
 688         mixer_device = sound_install_mixer(MIXER_DRIVER_VERSION, boardname,
 689                                            &aci_mixer_operations,
 690                                            sizeof(aci_mixer_operations), NULL);
 691         rc = 0;
 692         if (mixer_device < 0) {
 693                 printk(KERN_ERR "aci: Failed to install mixer.\n");
 694                 rc = mixer_device;
 695                 goto out_release_region;
 696         } /* else Maybe initialize the CS4231A mixer here... */
 697 out:    return rc;
 698 out_release_region:
 699         release_region(aci_port, 3);
 700         goto out;
 701 }
 702
 703 static void __exit unload_aci(void)
 704 {
 705         sound_unload_mixerdev(mixer_device);
 706         release_region(aci_port, 3);
 707 }
 708
 709 module_init(attach_aci);
 710 module_exit(unload_aci);
 711 MODULE_LICENSE("GPL");