linux-old/drivers/sound/aci.c
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   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
  64int aci_port;   /* as determined by bit 4 in the OPTi 929 MC4 register */
  65int aci_idcode[2];      /* manufacturer and product ID */
  66int aci_version;        /* ACI firmware version */
  67
  68EXPORT_SYMBOL(aci_port);
  69EXPORT_SYMBOL(aci_idcode);
  70EXPORT_SYMBOL(aci_version);
  71
  72#include "aci.h"
  73
  74
  75static int aci_solo;    /* status bit of the card that can't be         *
  76                         * checked with ACI versions prior to 0xb0      */
  77static int aci_amp;   /* status bit for power-amp/line-out level
  78                           but I have no docs about what is what... */
  79static int aci_micpreamp=3; /* microphone preamp-level that can't be    *
  80                         * checked with ACI versions prior to 0xb0      */
  81
  82static int mixer_device;
  83static struct semaphore aci_sem;
  84
  85#ifdef MODULE
  86static int reset;
  87MODULE_PARM(reset,"i");
  88MODULE_PARM_DESC(reset,"When set to 1, reset aci mixer.");
  89#else
  90static int reset = 1;
  91#endif
  92
  93static int ide=-1;
  94MODULE_PARM(ide,"i");
  95MODULE_PARM_DESC(ide,"1 enable, 0 disable ide-port - untested"
  96                 " default: do nothing");
  97static int wss=-1;
  98MODULE_PARM(wss,"i");
  99MODULE_PARM_DESC(wss,"change between ACI/WSS-mixer; use 0 and 1 - untested"
 100                 " default: do nothing; for PCM1-pro only");
 101
 102#if DEBUG
 103static void print_bits(unsigned char c)
 104{
 105        int j;
 106        printk(KERN_DEBUG "aci: ");
 107
 108        for (j=7; j>=0; j--) {
 109                printk("%d", (c >> j) & 0x1);
 110        }
 111
 112        printk("\n");
 113}
 114#endif
 115
 116/*
 117 * This busy wait code normally requires less than 15 loops and
 118 * practically always less than 100 loops on my i486/DX2 66 MHz.
 119 *
 120 * Warning: Waiting on the general status flag after reseting the MUTE
 121 * function can take a VERY long time, because the PCM12 does some kind
 122 * of fade-in effect. For this reason, access to the MUTE function has
 123 * not been implemented at all.
 124 *
 125 * - The OSS interface has no mute option. It takes about 3 seconds to
 126 * fade-in on my PCM20. busy_wait() handles it great now...     Robert
 127 */
 128
 129static int busy_wait(void)
 130{
 131        #define MINTIME 500
 132        long timeout;
 133        unsigned char byte;
 134
 135        for (timeout = 1; timeout <= MINTIME+30; timeout++) {
 136                if (((byte=inb(BUSY_REGISTER)) & 1) == 0) {
 137                        if (timeout >= MINTIME)
 138                                printk(KERN_DEBUG "aci: Got READYFLAG in round %ld.\n", timeout-MINTIME);
 139                        return byte;
 140                }
 141                if (timeout >= MINTIME) {
 142                        long out=10*HZ;
 143                        switch (timeout-MINTIME) {
 144                        case 0 ... 9:
 145                                out /= 10;
 146                        case 10 ... 19:
 147                                out /= 10;
 148                        case 20 ... 30:
 149                                out /= 10;
 150                        default:
 151                                set_current_state(TASK_UNINTERRUPTIBLE);
 152                                schedule_timeout(out);
 153                                break;
 154                        }
 155                }
 156        }
 157        printk(KERN_WARNING "aci: busy_wait() time out.\n");
 158        return -EBUSY;
 159}
 160
 161/* The four ACI command types are fucked up. [-:
 162 * implied is: 1w      - special case for INIT
 163 * write   is: 2w1r
 164 * read    is: x(1w1r) where x is 1 or 2 (1 CHECK_SIG, 1 CHECK_STER,
 165 *                                        1 VERSION, 2 IDCODE)
 166 *  the command is only in the first write, rest is protocol overhead
 167 *
 168 * indexed is technically a write and used for STATUS
 169 * and the special case for TUNE is: 3w1r
 170 * 
 171 * Here the new general sheme: TUNE --> aci_rw_cmd(x,  y,  z)
 172 *                indexed and write --> aci_rw_cmd(x,  y, -1)
 173 *           implied and read (x=1) --> aci_rw_cmd(x, -1, -1)
 174 *
 175 * Read (x>=2) is not implemented (only used during initialization).
 176 * Use aci_idcode[2] and aci_version...                    Robert
 177 */
 178
 179/* Some notes for error detection: theoretically it is possible.
 180 * But it doubles the I/O-traffic from ww(r) to wwwrw(r) in the normal 
 181 * case and doesn't seem to be designed for that...        Robert
 182 */
 183
 184static inline int aci_rawwrite(unsigned char byte)
 185{
 186        if (busy_wait() >= 0) {
 187#if DEBUG
 188                printk(KERN_DEBUG "aci_rawwrite(%d)\n", byte);
 189#endif
 190                outb(byte, COMMAND_REGISTER);
 191                return 0;
 192        } else
 193                return -EBUSY;
 194}
 195
 196static inline int aci_rawread(void)
 197{
 198        unsigned char byte;
 199
 200        if (busy_wait() >= 0) {
 201                byte=inb(STATUS_REGISTER);
 202#if DEBUG
 203                printk(KERN_DEBUG "%d = aci_rawread()\n", byte);
 204#endif
 205                return byte;
 206        } else
 207                return -EBUSY;
 208}
 209
 210
 211int aci_rw_cmd(int write1, int write2, int write3)
 212{
 213        int write[] = {write1, write2, write3};
 214        int read = -EINTR, i;
 215
 216        if (down_interruptible(&aci_sem))
 217                goto out;
 218
 219        for (i=0; i<3; i++) {
 220                if (write[i]< 0 || write[i] > 255)
 221                        break;
 222                else {
 223                        read = aci_rawwrite(write[i]);
 224                        if (read < 0)
 225                                goto out_up;
 226                }
 227                
 228        }
 229        
 230        read = aci_rawread();
 231out_up: up(&aci_sem);
 232out:    return read;
 233}
 234
 235EXPORT_SYMBOL(aci_rw_cmd);
 236
 237static int setvolume(caddr_t arg, 
 238                     unsigned char left_index, unsigned char right_index)
 239{
 240        int vol, ret, uservol, buf;
 241
 242        __get_user(uservol, (int *)arg);
 243
 244        /* left channel */
 245        vol = uservol & 0xff;
 246        if (vol > 100)
 247                vol = 100;
 248        vol = SCALE(100, 0x20, vol);
 249        if ((buf=aci_write_cmd(left_index, 0x20 - vol))<0)
 250                return buf;
 251        ret = SCALE(0x20, 100, vol);
 252
 253
 254        /* right channel */
 255        vol = (uservol >> 8) & 0xff;
 256        if (vol > 100)
 257                vol = 100;
 258        vol = SCALE(100, 0x20, vol);
 259        if ((buf=aci_write_cmd(right_index, 0x20 - vol))<0)
 260                return buf;
 261        ret |= SCALE(0x20, 100, vol) << 8;
 262 
 263        __put_user(ret, (int *)arg);
 264
 265        return 0;
 266}
 267
 268static int getvolume(caddr_t arg,
 269                     unsigned char left_index, unsigned char right_index)
 270{
 271        int vol;
 272        int buf;
 273
 274        /* left channel */
 275        if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
 276                return buf;
 277        vol = SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0);
 278        
 279        /* right channel */
 280        if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
 281                return buf;
 282        vol |= SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0) << 8;
 283
 284        __put_user(vol, (int *)arg);
 285
 286        return 0;
 287}
 288
 289
 290/* The equalizer is somewhat strange on the ACI. From -12dB to +12dB
 291 * write:  0xff..down.to..0x80==0x00..up.to..0x7f
 292 */
 293
 294static inline unsigned int eq_oss2aci(unsigned int vol)
 295{
 296        int boost=0;
 297        unsigned int ret;
 298
 299        if (vol > 100)
 300                vol = 100;
 301        if (vol > 50) {
 302                vol -= 51;
 303                boost=1;
 304        }
 305        if (boost)
 306                ret=SCALE(49, 0x7e, vol)+1;
 307        else
 308                ret=0xff - SCALE(50, 0x7f, vol);
 309        return ret;
 310}
 311
 312static inline unsigned int eq_aci2oss(unsigned int vol)
 313{
 314        if (vol < 0x80)
 315                return SCALE(0x7f, 50, vol) + 50;
 316        else
 317                return SCALE(0x7f, 50, 0xff-vol);
 318}
 319
 320
 321static int setequalizer(caddr_t arg, 
 322                        unsigned char left_index, unsigned char right_index)
 323{
 324        int buf;
 325        unsigned int vol;
 326
 327        __get_user(vol, (int *)arg);
 328
 329        /* left channel */
 330        if ((buf=aci_write_cmd(left_index, eq_oss2aci(vol & 0xff)))<0)
 331                return buf;
 332
 333        /* right channel */
 334        if ((buf=aci_write_cmd(right_index, eq_oss2aci((vol>>8) & 0xff)))<0)
 335                return buf;
 336
 337        /* the ACI equalizer is more precise */
 338        return 0;
 339}
 340
 341static int getequalizer(caddr_t arg,
 342                        unsigned char left_index, unsigned char right_index)
 343{
 344        int buf;
 345        unsigned int vol;
 346
 347        /* left channel */
 348        if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
 349                return buf;
 350        vol = eq_aci2oss(buf);
 351        
 352        /* right channel */
 353        if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
 354                return buf;
 355        vol |= eq_aci2oss(buf) << 8;
 356
 357        __put_user(vol, (int *)arg);
 358
 359        return 0;
 360}
 361
 362static int aci_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg)
 363{
 364        int vol, buf;
 365
 366        switch (cmd) {
 367        case SOUND_MIXER_WRITE_VOLUME:
 368                return setvolume(arg, 0x01, 0x00);
 369        case SOUND_MIXER_WRITE_CD:
 370                return setvolume(arg, 0x3c, 0x34);
 371        case SOUND_MIXER_WRITE_MIC:
 372                return setvolume(arg, 0x38, 0x30);
 373        case SOUND_MIXER_WRITE_LINE:
 374                return setvolume(arg, 0x39, 0x31);
 375        case SOUND_MIXER_WRITE_SYNTH:
 376                return setvolume(arg, 0x3b, 0x33);
 377        case SOUND_MIXER_WRITE_PCM:
 378                return setvolume(arg, 0x3a, 0x32);
 379        case MIXER_WRITE(SOUND_MIXER_RADIO): /* fall through */
 380        case SOUND_MIXER_WRITE_LINE1:  /* AUX1 or radio */
 381                return setvolume(arg, 0x3d, 0x35);
 382        case SOUND_MIXER_WRITE_LINE2:  /* AUX2 */
 383                return setvolume(arg, 0x3e, 0x36);
 384        case SOUND_MIXER_WRITE_BASS:   /* set band one and two */
 385                if (aci_idcode[1]=='C') {
 386                        if ((buf=setequalizer(arg, 0x48, 0x40)) || 
 387                            (buf=setequalizer(arg, 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(arg, 0x4d, 0x45)) || 
 394                            (buf=setequalizer(arg, 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, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 430                        return 0;
 431                }
 432                break;
 433        case SOUND_MIXER_WRITE_RECSRC:
 434                /* handle solo mode control */
 435                __get_user(buf, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 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, (int *)arg);
 527                return 0;
 528        case SOUND_MIXER_READ_CAPS:
 529                __put_user(0, (int *)arg);
 530                return 0;
 531        case SOUND_MIXER_READ_VOLUME:
 532                return getvolume(arg, 0x04, 0x03);
 533        case SOUND_MIXER_READ_CD:
 534                return getvolume(arg, 0x0a, 0x09);
 535        case SOUND_MIXER_READ_MIC:
 536                return getvolume(arg, 0x06, 0x05);
 537        case SOUND_MIXER_READ_LINE:
 538                return getvolume(arg, 0x08, 0x07);
 539        case SOUND_MIXER_READ_SYNTH:
 540                return getvolume(arg, 0x0c, 0x0b);
 541        case SOUND_MIXER_READ_PCM:
 542                return getvolume(arg, 0x0e, 0x0d);
 543        case MIXER_READ(SOUND_MIXER_RADIO): /* fall through */
 544        case SOUND_MIXER_READ_LINE1:  /* AUX1 */
 545                return getvolume(arg, 0x11, 0x10);
 546        case SOUND_MIXER_READ_LINE2:  /* AUX2 */
 547                return getvolume(arg, 0x13, 0x12);
 548        case SOUND_MIXER_READ_BASS:   /* get band one */
 549                if (aci_idcode[1]=='C') {
 550                        return getequalizer(arg, 0x23, 0x22);
 551                }
 552                break;
 553        case SOUND_MIXER_READ_TREBLE: /* get band seven */
 554                if (aci_idcode[1]=='C') {
 555                        return getequalizer(arg, 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, (int *)arg);
 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, (int *)arg);
 580                return 0;
 581        }
 582        return -EINVAL;
 583}
 584
 585static 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
 601static 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... */
 697out:    return rc;
 698out_release_region:
 699        release_region(aci_port, 3);
 700        goto out;
 701}
 702
 703static void __exit unload_aci(void)
 704{
 705        sound_unload_mixerdev(mixer_device);
 706        release_region(aci_port, 3);
 707}
 708
 709module_init(attach_aci);
 710module_exit(unload_aci);
 711MODULE_LICENSE("GPL");
 712