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   1 /*
   2  * au1550_ac97.c  --  Sound driver for Alchemy Au1550 MIPS Internet Edge
   3  *                    Processor.
   4  *
   5  * Copyright 2004 Embedded Edge, LLC
   6  *      dan@embeddededge.com
   7  *
   8  * Mostly copied from the au1000.c driver and some from the
   9  * PowerMac dbdma driver.
  10  * We assume the processor can do memory coherent DMA.
  11  *
  12  * Ported to 2.6 by Matt Porter <mporter@kernel.crashing.org>
  13  *
  14  *  This program is free software; you can redistribute  it and/or modify it
  15  *  under  the terms of  the GNU General  Public License as published by the
  16  *  Free Software Foundation;  either version 2 of the  License, or (at your
  17  *  option) any later version.
  18  *
  19  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  20  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  21  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  22  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  23  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  25  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  26  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  27  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *  You should have received a copy of the  GNU General Public License along
  31  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  32  *  675 Mass Ave, Cambridge, MA 02139, USA.
  33  *
  34  */
  35
  36 #undef DEBUG
  37
  38 #include <linux/module.h>
  39 #include <linux/string.h>
  40 #include <linux/ioport.h>
  41 #include <linux/sched.h>
  42 #include <linux/delay.h>
  43 #include <linux/sound.h>
  44 #include <linux/slab.h>
  45 #include <linux/soundcard.h>
  46 #include <linux/init.h>
  47 #include <linux/interrupt.h>
  48 #include <linux/kernel.h>
  49 #include <linux/poll.h>
  50 #include <linux/pci.h>
  51 #include <linux/bitops.h>
  52 #include <linux/spinlock.h>
  53 #include <linux/smp_lock.h>
  54 #include <linux/ac97_codec.h>
  55 #include <asm/io.h>
  56 #include <asm/uaccess.h>
  57 #include <asm/hardirq.h>
  58 #include <asm/mach-au1x00/au1000.h>
  59 #include <asm/mach-au1x00/au1xxx_psc.h>
  60 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  61
  62 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
  63
  64 /* misc stuff */
  65 #define POLL_COUNT   0x50000
  66 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
  67
  68 /* The number of DBDMA ring descriptors to allocate.  No sense making
  69  * this too large....if you can't keep up with a few you aren't likely
  70  * to be able to with lots of them, either.
  71  */
  72 #define NUM_DBDMA_DESCRIPTORS 4
  73
  74 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
  75
  76 /* Boot options
  77  * 0 = no VRA, 1 = use VRA if codec supports it
  78  */
  79 static int      vra = 1;
  80 MODULE_PARM(vra, "i");
  81 MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
  82
  83 static struct au1550_state {
  84         /* soundcore stuff */
  85         int             dev_audio;
  86
  87         struct ac97_codec *codec;
  88         unsigned        codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
  89         unsigned        codec_ext_caps;  /* AC'97 reg 28h, "Extended Audio ID" */
  90         int             no_vra;         /* do not use VRA */
  91
  92         spinlock_t      lock;
  93         struct semaphore open_sem;
  94         struct semaphore sem;
  95         mode_t          open_mode;
  96         wait_queue_head_t open_wait;
  97
  98         struct dmabuf {
  99                 u32             dmanr;
 100                 unsigned        sample_rate;
 101                 unsigned        src_factor;
 102                 unsigned        sample_size;
 103                 int             num_channels;
 104                 int             dma_bytes_per_sample;
 105                 int             user_bytes_per_sample;
 106                 int             cnt_factor;
 107
 108                 void            *rawbuf;
 109                 unsigned        buforder;
 110                 unsigned        numfrag;
 111                 unsigned        fragshift;
 112                 void            *nextIn;
 113                 void            *nextOut;
 114                 int             count;
 115                 unsigned        total_bytes;
 116                 unsigned        error;
 117                 wait_queue_head_t wait;
 118
 119                 /* redundant, but makes calculations easier */
 120                 unsigned        fragsize;
 121                 unsigned        dma_fragsize;
 122                 unsigned        dmasize;
 123                 unsigned        dma_qcount;
 124
 125                 /* OSS stuff */
 126                 unsigned        mapped:1;
 127                 unsigned        ready:1;
 128                 unsigned        stopped:1;
 129                 unsigned        ossfragshift;
 130                 int             ossmaxfrags;
 131                 unsigned        subdivision;
 132         } dma_dac, dma_adc;
 133 } au1550_state;
 134
 135 static unsigned
 136 ld2(unsigned int x)
 137 {
 138         unsigned        r = 0;
 139
 140         if (x >= 0x10000) {
 141                 x >>= 16;
 142                 r += 16;
 143         }
 144         if (x >= 0x100) {
 145                 x >>= 8;
 146                 r += 8;
 147         }
 148         if (x >= 0x10) {
 149                 x >>= 4;
 150                 r += 4;
 151         }
 152         if (x >= 4) {
 153                 x >>= 2;
 154                 r += 2;
 155         }
 156         if (x >= 2)
 157                 r++;
 158         return r;
 159 }
 160
 161 static void
 162 au1550_delay(int msec)
 163 {
 164         unsigned long   tmo;
 165         signed long     tmo2;
 166
 167         if (in_interrupt())
 168                 return;
 169
 170         tmo = jiffies + (msec * HZ) / 1000;
 171         for (;;) {
 172                 tmo2 = tmo - jiffies;
 173                 if (tmo2 <= 0)
 174                         break;
 175                 schedule_timeout(tmo2);
 176         }
 177 }
 178
 179 static u16
 180 rdcodec(struct ac97_codec *codec, u8 addr)
 181 {
 182         struct au1550_state *s = (struct au1550_state *)codec->private_data;
 183         unsigned long   flags;
 184         u32             cmd, val;
 185         u16             data;
 186         int             i;
 187
 188         spin_lock_irqsave(&s->lock, flags);
 189
 190         for (i = 0; i < POLL_COUNT; i++) {
 191                 val = au_readl(PSC_AC97STAT);
 192                 au_sync();
 193                 if (!(val & PSC_AC97STAT_CP))
 194                         break;
 195         }
 196         if (i == POLL_COUNT)
 197                 err("rdcodec: codec cmd pending expired!");
 198
 199         cmd = (u32)PSC_AC97CDC_INDX(addr);
 200         cmd |= PSC_AC97CDC_RD;  /* read command */
 201         au_writel(cmd, PSC_AC97CDC);
 202         au_sync();
 203
 204         /* now wait for the data
 205         */
 206         for (i = 0; i < POLL_COUNT; i++) {
 207                 val = au_readl(PSC_AC97STAT);
 208                 au_sync();
 209                 if (!(val & PSC_AC97STAT_CP))
 210                         break;
 211         }
 212         if (i == POLL_COUNT) {
 213                 err("rdcodec: read poll expired!");
 214                 return 0;
 215         }
 216
 217         /* wait for command done?
 218         */
 219         for (i = 0; i < POLL_COUNT; i++) {
 220                 val = au_readl(PSC_AC97EVNT);
 221                 au_sync();
 222                 if (val & PSC_AC97EVNT_CD)
 223                         break;
 224         }
 225         if (i == POLL_COUNT) {
 226                 err("rdcodec: read cmdwait expired!");
 227                 return 0;
 228         }
 229
 230         data = au_readl(PSC_AC97CDC) & 0xffff;
 231         au_sync();
 232
 233         /* Clear command done event.
 234         */
 235         au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
 236         au_sync();
 237
 238         spin_unlock_irqrestore(&s->lock, flags);
 239
 240         return data;
 241 }
 242
 243
 244 static void
 245 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
 246 {
 247         struct au1550_state *s = (struct au1550_state *)codec->private_data;
 248         unsigned long   flags;
 249         u32             cmd, val;
 250         int             i;
 251
 252         spin_lock_irqsave(&s->lock, flags);
 253
 254         for (i = 0; i < POLL_COUNT; i++) {
 255                 val = au_readl(PSC_AC97STAT);
 256                 au_sync();
 257                 if (!(val & PSC_AC97STAT_CP))
 258                         break;
 259         }
 260         if (i == POLL_COUNT)
 261                 err("wrcodec: codec cmd pending expired!");
 262
 263         cmd = (u32)PSC_AC97CDC_INDX(addr);
 264         cmd |= (u32)data;
 265         au_writel(cmd, PSC_AC97CDC);
 266         au_sync();
 267
 268         for (i = 0; i < POLL_COUNT; i++) {
 269                 val = au_readl(PSC_AC97STAT);
 270                 au_sync();
 271                 if (!(val & PSC_AC97STAT_CP))
 272                         break;
 273         }
 274         if (i == POLL_COUNT)
 275                 err("wrcodec: codec cmd pending expired!");
 276
 277         for (i = 0; i < POLL_COUNT; i++) {
 278                 val = au_readl(PSC_AC97EVNT);
 279                 au_sync();
 280                 if (val & PSC_AC97EVNT_CD)
 281                         break;
 282         }
 283         if (i == POLL_COUNT)
 284                 err("wrcodec: read cmdwait expired!");
 285
 286         /* Clear command done event.
 287         */
 288         au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
 289         au_sync();
 290
 291         spin_unlock_irqrestore(&s->lock, flags);
 292 }
 293
 294 static void
 295 waitcodec(struct ac97_codec *codec)
 296 {
 297         u16     temp;
 298         u32     val;
 299         int     i;
 300
 301         /* codec_wait is used to wait for a ready state after
 302          * an AC97C_RESET.
 303          */
 304         au1550_delay(10);
 305
 306         /* first poll the CODEC_READY tag bit
 307         */
 308         for (i = 0; i < POLL_COUNT; i++) {
 309                 val = au_readl(PSC_AC97STAT);
 310                 au_sync();
 311                 if (val & PSC_AC97STAT_CR)
 312                         break;
 313         }
 314         if (i == POLL_COUNT) {
 315                 err("waitcodec: CODEC_READY poll expired!");
 316                 return;
 317         }
 318
 319         /* get AC'97 powerdown control/status register
 320         */
 321         temp = rdcodec(codec, AC97_POWER_CONTROL);
 322
 323         /* If anything is powered down, power'em up
 324         */
 325         if (temp & 0x7f00) {
 326                 /* Power on
 327                 */
 328                 wrcodec(codec, AC97_POWER_CONTROL, 0);
 329                 au1550_delay(100);
 330
 331                 /* Reread
 332                 */
 333                 temp = rdcodec(codec, AC97_POWER_CONTROL);
 334         }
 335
 336         /* Check if Codec REF,ANL,DAC,ADC ready
 337         */
 338         if ((temp & 0x7f0f) != 0x000f)
 339                 err("codec reg 26 status (0x%x) not ready!!", temp);
 340 }
 341
 342 /* stop the ADC before calling */
 343 static void
 344 set_adc_rate(struct au1550_state *s, unsigned rate)
 345 {
 346         struct dmabuf  *adc = &s->dma_adc;
 347         struct dmabuf  *dac = &s->dma_dac;
 348         unsigned        adc_rate, dac_rate;
 349         u16             ac97_extstat;
 350
 351         if (s->no_vra) {
 352                 /* calc SRC factor
 353                 */
 354                 adc->src_factor = ((96000 / rate) + 1) >> 1;
 355                 adc->sample_rate = 48000 / adc->src_factor;
 356                 return;
 357         }
 358
 359         adc->src_factor = 1;
 360
 361         ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
 362
 363         rate = rate > 48000 ? 48000 : rate;
 364
 365         /* enable VRA
 366         */
 367         wrcodec(s->codec, AC97_EXTENDED_STATUS,
 368                 ac97_extstat | AC97_EXTSTAT_VRA);
 369
 370         /* now write the sample rate
 371         */
 372         wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
 373
 374         /* read it back for actual supported rate
 375         */
 376         adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
 377
 378         pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
 379
 380         /* some codec's don't allow unequal DAC and ADC rates, in which case
 381          * writing one rate reg actually changes both.
 382          */
 383         dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
 384         if (dac->num_channels > 2)
 385                 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
 386         if (dac->num_channels > 4)
 387                 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
 388
 389         adc->sample_rate = adc_rate;
 390         dac->sample_rate = dac_rate;
 391 }
 392
 393 /* stop the DAC before calling */
 394 static void
 395 set_dac_rate(struct au1550_state *s, unsigned rate)
 396 {
 397         struct dmabuf  *dac = &s->dma_dac;
 398         struct dmabuf  *adc = &s->dma_adc;
 399         unsigned        adc_rate, dac_rate;
 400         u16             ac97_extstat;
 401
 402         if (s->no_vra) {
 403                 /* calc SRC factor
 404                 */
 405                 dac->src_factor = ((96000 / rate) + 1) >> 1;
 406                 dac->sample_rate = 48000 / dac->src_factor;
 407                 return;
 408         }
 409
 410         dac->src_factor = 1;
 411
 412         ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
 413
 414         rate = rate > 48000 ? 48000 : rate;
 415
 416         /* enable VRA
 417         */
 418         wrcodec(s->codec, AC97_EXTENDED_STATUS,
 419                 ac97_extstat | AC97_EXTSTAT_VRA);
 420
 421         /* now write the sample rate
 422         */
 423         wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
 424
 425         /* I don't support different sample rates for multichannel,
 426          * so make these channels the same.
 427          */
 428         if (dac->num_channels > 2)
 429                 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
 430         if (dac->num_channels > 4)
 431                 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
 432         /* read it back for actual supported rate
 433         */
 434         dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
 435
 436         pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
 437
 438         /* some codec's don't allow unequal DAC and ADC rates, in which case
 439          * writing one rate reg actually changes both.
 440          */
 441         adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
 442
 443         dac->sample_rate = dac_rate;
 444         adc->sample_rate = adc_rate;
 445 }
 446
 447 static void
 448 stop_dac(struct au1550_state *s)
 449 {
 450         struct dmabuf  *db = &s->dma_dac;
 451         u32             stat;
 452         unsigned long   flags;
 453
 454         if (db->stopped)
 455                 return;
 456
 457         spin_lock_irqsave(&s->lock, flags);
 458
 459         au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
 460         au_sync();
 461
 462         /* Wait for Transmit Busy to show disabled.
 463         */
 464         do {
 465                 stat = readl((void *)PSC_AC97STAT);
 466                 au_sync();
 467         } while ((stat & PSC_AC97STAT_TB) != 0);
 468
 469         au1xxx_dbdma_reset(db->dmanr);
 470
 471         db->stopped = 1;
 472
 473         spin_unlock_irqrestore(&s->lock, flags);
 474 }
 475
 476 static void
 477 stop_adc(struct au1550_state *s)
 478 {
 479         struct dmabuf  *db = &s->dma_adc;
 480         unsigned long   flags;
 481         u32             stat;
 482
 483         if (db->stopped)
 484                 return;
 485
 486         spin_lock_irqsave(&s->lock, flags);
 487
 488         au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
 489         au_sync();
 490
 491         /* Wait for Receive Busy to show disabled.
 492         */
 493         do {
 494                 stat = readl((void *)PSC_AC97STAT);
 495                 au_sync();
 496         } while ((stat & PSC_AC97STAT_RB) != 0);
 497
 498         au1xxx_dbdma_reset(db->dmanr);
 499
 500         db->stopped = 1;
 501
 502         spin_unlock_irqrestore(&s->lock, flags);
 503 }
 504
 505
 506 static void
 507 set_xmit_slots(int num_channels)
 508 {
 509         u32     ac97_config, stat;
 510
 511         ac97_config = au_readl(PSC_AC97CFG);
 512         au_sync();
 513         ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
 514         au_writel(ac97_config, PSC_AC97CFG);
 515         au_sync();
 516
 517         switch (num_channels) {
 518         case 6:         /* stereo with surround and center/LFE,
 519                          * slots 3,4,6,7,8,9
 520                          */
 521                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
 522                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
 523
 524         case 4:         /* stereo with surround, slots 3,4,7,8 */
 525                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
 526                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
 527
 528         case 2:         /* stereo, slots 3,4 */
 529         case 1:         /* mono */
 530                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
 531                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
 532         }
 533
 534         au_writel(ac97_config, PSC_AC97CFG);
 535         au_sync();
 536
 537         ac97_config |= PSC_AC97CFG_DE_ENABLE;
 538         au_writel(ac97_config, PSC_AC97CFG);
 539         au_sync();
 540
 541         /* Wait for Device ready.
 542         */
 543         do {
 544                 stat = readl((void *)PSC_AC97STAT);
 545                 au_sync();
 546         } while ((stat & PSC_AC97STAT_DR) == 0);
 547 }
 548
 549 static void
 550 set_recv_slots(int num_channels)
 551 {
 552         u32     ac97_config, stat;
 553
 554         ac97_config = au_readl(PSC_AC97CFG);
 555         au_sync();
 556         ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
 557         au_writel(ac97_config, PSC_AC97CFG);
 558         au_sync();
 559
 560         /* Always enable slots 3 and 4 (stereo). Slot 6 is
 561          * optional Mic ADC, which we don't support yet.
 562          */
 563         ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
 564         ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
 565
 566         au_writel(ac97_config, PSC_AC97CFG);
 567         au_sync();
 568
 569         ac97_config |= PSC_AC97CFG_DE_ENABLE;
 570         au_writel(ac97_config, PSC_AC97CFG);
 571         au_sync();
 572
 573         /* Wait for Device ready.
 574         */
 575         do {
 576                 stat = readl((void *)PSC_AC97STAT);
 577                 au_sync();
 578         } while ((stat & PSC_AC97STAT_DR) == 0);
 579 }
 580
 581 /* Hold spinlock for both start_dac() and start_adc() calls */
 582 static void
 583 start_dac(struct au1550_state *s)
 584 {
 585         struct dmabuf  *db = &s->dma_dac;
 586
 587         if (!db->stopped)
 588                 return;
 589
 590         set_xmit_slots(db->num_channels);
 591         au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
 592         au_sync();
 593         au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
 594         au_sync();
 595
 596         au1xxx_dbdma_start(db->dmanr);
 597
 598         db->stopped = 0;
 599 }
 600
 601 static void
 602 start_adc(struct au1550_state *s)
 603 {
 604         struct dmabuf  *db = &s->dma_adc;
 605         int     i;
 606
 607         if (!db->stopped)
 608                 return;
 609
 610         /* Put two buffers on the ring to get things started.
 611         */
 612         for (i=0; i<2; i++) {
 613                 au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
 614
 615                 db->nextIn += db->dma_fragsize;
 616                 if (db->nextIn >= db->rawbuf + db->dmasize)
 617                         db->nextIn -= db->dmasize;
 618         }
 619
 620         set_recv_slots(db->num_channels);
 621         au1xxx_dbdma_start(db->dmanr);
 622         au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
 623         au_sync();
 624         au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
 625         au_sync();
 626
 627         db->stopped = 0;
 628 }
 629
 630 static int
 631 prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
 632 {
 633         unsigned user_bytes_per_sec;
 634         unsigned        bufs;
 635         unsigned        rate = db->sample_rate;
 636
 637         if (!db->rawbuf) {
 638                 db->ready = db->mapped = 0;
 639                 db->buforder = 5;       /* 32 * PAGE_SIZE */
 640                 db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
 641                 if (!db->rawbuf)
 642                         return -ENOMEM;
 643         }
 644
 645         db->cnt_factor = 1;
 646         if (db->sample_size == 8)
 647                 db->cnt_factor *= 2;
 648         if (db->num_channels == 1)
 649                 db->cnt_factor *= 2;
 650         db->cnt_factor *= db->src_factor;
 651
 652         db->count = 0;
 653         db->dma_qcount = 0;
 654         db->nextIn = db->nextOut = db->rawbuf;
 655
 656         db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
 657         db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
 658                                         2 : db->num_channels);
 659
 660         user_bytes_per_sec = rate * db->user_bytes_per_sample;
 661         bufs = PAGE_SIZE << db->buforder;
 662         if (db->ossfragshift) {
 663                 if ((1000 << db->ossfragshift) < user_bytes_per_sec)
 664                         db->fragshift = ld2(user_bytes_per_sec/1000);
 665                 else
 666                         db->fragshift = db->ossfragshift;
 667         } else {
 668                 db->fragshift = ld2(user_bytes_per_sec / 100 /
 669                                     (db->subdivision ? db->subdivision : 1));
 670                 if (db->fragshift < 3)
 671                         db->fragshift = 3;
 672         }
 673
 674         db->fragsize = 1 << db->fragshift;
 675         db->dma_fragsize = db->fragsize * db->cnt_factor;
 676         db->numfrag = bufs / db->dma_fragsize;
 677
 678         while (db->numfrag < 4 && db->fragshift > 3) {
 679                 db->fragshift--;
 680                 db->fragsize = 1 << db->fragshift;
 681                 db->dma_fragsize = db->fragsize * db->cnt_factor;
 682                 db->numfrag = bufs / db->dma_fragsize;
 683         }
 684
 685         if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
 686                 db->numfrag = db->ossmaxfrags;
 687
 688         db->dmasize = db->dma_fragsize * db->numfrag;
 689         memset(db->rawbuf, 0, bufs);
 690
 691         pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
 692             rate, db->sample_size, db->num_channels);
 693         pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
 694             db->fragsize, db->cnt_factor, db->dma_fragsize);
 695         pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
 696
 697         db->ready = 1;
 698         return 0;
 699 }
 700
 701 static int
 702 prog_dmabuf_adc(struct au1550_state *s)
 703 {
 704         stop_adc(s);
 705         return prog_dmabuf(s, &s->dma_adc);
 706
 707 }
 708
 709 static int
 710 prog_dmabuf_dac(struct au1550_state *s)
 711 {
 712         stop_dac(s);
 713         return prog_dmabuf(s, &s->dma_dac);
 714 }
 715
 716
 717 static void
 718 dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 719 {
 720         struct au1550_state *s = (struct au1550_state *) dev_id;
 721         struct dmabuf  *db = &s->dma_dac;
 722         u32     ac97c_stat;
 723
 724         spin_lock(&s->lock);
 725
 726         ac97c_stat = au_readl(PSC_AC97STAT);
 727         if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
 728                 pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
 729         db->dma_qcount--;
 730
 731         if (db->count >= db->fragsize) {
 732                 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
 733                                                         db->fragsize) == 0) {
 734                         err("qcount < 2 and no ring room!");
 735                 }
 736                 db->nextOut += db->fragsize;
 737                 if (db->nextOut >= db->rawbuf + db->dmasize)
 738                         db->nextOut -= db->dmasize;
 739                 db->count -= db->fragsize;
 740                 db->total_bytes += db->dma_fragsize;
 741                 db->dma_qcount++;
 742         }
 743
 744         /* wake up anybody listening */
 745         if (waitqueue_active(&db->wait))
 746                 wake_up(&db->wait);
 747
 748         spin_unlock(&s->lock);
 749 }
 750
 751
 752 static void
 753 adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 754 {
 755         struct  au1550_state *s = (struct au1550_state *)dev_id;
 756         struct  dmabuf  *dp = &s->dma_adc;
 757         u32     obytes;
 758         char    *obuf;
 759
 760         spin_lock(&s->lock);
 761
 762         /* Pull the buffer from the dma queue.
 763         */
 764         au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
 765
 766         if ((dp->count + obytes) > dp->dmasize) {
 767                 /* Overrun. Stop ADC and log the error
 768                 */
 769                 spin_unlock(&s->lock);
 770                 stop_adc(s);
 771                 dp->error++;
 772                 err("adc overrun");
 773                 return;
 774         }
 775
 776         /* Put a new empty buffer on the destination DMA.
 777         */
 778         au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
 779
 780         dp->nextIn += dp->dma_fragsize;
 781         if (dp->nextIn >= dp->rawbuf + dp->dmasize)
 782                 dp->nextIn -= dp->dmasize;
 783
 784         dp->count += obytes;
 785         dp->total_bytes += obytes;
 786
 787         /* wake up anybody listening
 788         */
 789         if (waitqueue_active(&dp->wait))
 790                 wake_up(&dp->wait);
 791
 792         spin_unlock(&s->lock);
 793 }
 794
 795 static loff_t
 796 au1550_llseek(struct file *file, loff_t offset, int origin)
 797 {
 798         return -ESPIPE;
 799 }
 800
 801
 802 static int
 803 au1550_open_mixdev(struct inode *inode, struct file *file)
 804 {
 805         file->private_data = &au1550_state;
 806         return 0;
 807 }
 808
 809 static int
 810 au1550_release_mixdev(struct inode *inode, struct file *file)
 811 {
 812         return 0;
 813 }
 814
 815 static int
 816 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
 817                         unsigned long arg)
 818 {
 819         return codec->mixer_ioctl(codec, cmd, arg);
 820 }
 821
 822 static int
 823 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
 824                                unsigned int cmd, unsigned long arg)
 825 {
 826         struct au1550_state *s = (struct au1550_state *)file->private_data;
 827         struct ac97_codec *codec = s->codec;
 828
 829         return mixdev_ioctl(codec, cmd, arg);
 830 }
 831
 832 static /*const */ struct file_operations au1550_mixer_fops = {
 833         owner:THIS_MODULE,
 834         llseek:au1550_llseek,
 835         ioctl:au1550_ioctl_mixdev,
 836         open:au1550_open_mixdev,
 837         release:au1550_release_mixdev,
 838 };
 839
 840 static int
 841 drain_dac(struct au1550_state *s, int nonblock)
 842 {
 843         unsigned long   flags;
 844         int             count, tmo;
 845
 846         if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
 847                 return 0;
 848
 849         for (;;) {
 850                 spin_lock_irqsave(&s->lock, flags);
 851                 count = s->dma_dac.count;
 852                 spin_unlock_irqrestore(&s->lock, flags);
 853                 if (count <= s->dma_dac.fragsize)
 854                         break;
 855                 if (signal_pending(current))
 856                         break;
 857                 if (nonblock)
 858                         return -EBUSY;
 859                 tmo = 1000 * count / (s->no_vra ?
 860                                       48000 : s->dma_dac.sample_rate);
 861                 tmo /= s->dma_dac.dma_bytes_per_sample;
 862                 au1550_delay(tmo);
 863         }
 864         if (signal_pending(current))
 865                 return -ERESTARTSYS;
 866         return 0;
 867 }
 868
 869 static inline u8 S16_TO_U8(s16 ch)
 870 {
 871         return (u8) (ch >> 8) + 0x80;
 872 }
 873 static inline s16 U8_TO_S16(u8 ch)
 874 {
 875         return (s16) (ch - 0x80) << 8;
 876 }
 877
 878 /*
 879  * Translates user samples to dma buffer suitable for AC'97 DAC data:
 880  *     If mono, copy left channel to right channel in dma buffer.
 881  *     If 8 bit samples, cvt to 16-bit before writing to dma buffer.
 882  *     If interpolating (no VRA), duplicate every audio frame src_factor times.
 883  */
 884 static int
 885 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
 886                                                                int dmacount)
 887 {
 888         int             sample, i;
 889         int             interp_bytes_per_sample;
 890         int             num_samples;
 891         int             mono = (db->num_channels == 1);
 892         char            usersample[12];
 893         s16             ch, dmasample[6];
 894
 895         if (db->sample_size == 16 && !mono && db->src_factor == 1) {
 896                 /* no translation necessary, just copy
 897                 */
 898                 if (copy_from_user(dmabuf, userbuf, dmacount))
 899                         return -EFAULT;
 900                 return dmacount;
 901         }
 902
 903         interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
 904         num_samples = dmacount / interp_bytes_per_sample;
 905
 906         for (sample = 0; sample < num_samples; sample++) {
 907                 if (copy_from_user(usersample, userbuf,
 908                                    db->user_bytes_per_sample)) {
 909                         return -EFAULT;
 910                 }
 911
 912                 for (i = 0; i < db->num_channels; i++) {
 913                         if (db->sample_size == 8)
 914                                 ch = U8_TO_S16(usersample[i]);
 915                         else
 916                                 ch = *((s16 *) (&usersample[i * 2]));
 917                         dmasample[i] = ch;
 918                         if (mono)
 919                                 dmasample[i + 1] = ch;  /* right channel */
 920                 }
 921
 922                 /* duplicate every audio frame src_factor times
 923                 */
 924                 for (i = 0; i < db->src_factor; i++)
 925                         memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
 926
 927                 userbuf += db->user_bytes_per_sample;
 928                 dmabuf += interp_bytes_per_sample;
 929         }
 930
 931         return num_samples * interp_bytes_per_sample;
 932 }
 933
 934 /*
 935  * Translates AC'97 ADC samples to user buffer:
 936  *     If mono, send only left channel to user buffer.
 937  *     If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
 938  *     If decimating (no VRA), skip over src_factor audio frames.
 939  */
 940 static int
 941 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
 942                                                              int dmacount)
 943 {
 944         int             sample, i;
 945         int             interp_bytes_per_sample;
 946         int             num_samples;
 947         int             mono = (db->num_channels == 1);
 948         char            usersample[12];
 949
 950         if (db->sample_size == 16 && !mono && db->src_factor == 1) {
 951                 /* no translation necessary, just copy
 952                 */
 953                 if (copy_to_user(userbuf, dmabuf, dmacount))
 954                         return -EFAULT;
 955                 return dmacount;
 956         }
 957
 958         interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
 959         num_samples = dmacount / interp_bytes_per_sample;
 960
 961         for (sample = 0; sample < num_samples; sample++) {
 962                 for (i = 0; i < db->num_channels; i++) {
 963                         if (db->sample_size == 8)
 964                                 usersample[i] =
 965                                         S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
 966                         else
 967                                 *((s16 *) (&usersample[i * 2])) =
 968                                         *((s16 *) (&dmabuf[i * 2]));
 969                 }
 970
 971                 if (copy_to_user(userbuf, usersample,
 972                                  db->user_bytes_per_sample)) {
 973                         return -EFAULT;
 974                 }
 975
 976                 userbuf += db->user_bytes_per_sample;
 977                 dmabuf += interp_bytes_per_sample;
 978         }
 979
 980         return num_samples * interp_bytes_per_sample;
 981 }
 982
 983 /*
 984  * Copy audio data to/from user buffer from/to dma buffer, taking care
 985  * that we wrap when reading/writing the dma buffer. Returns actual byte
 986  * count written to or read from the dma buffer.
 987  */
 988 static int
 989 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
 990 {
 991         char           *bufptr = to_user ? db->nextOut : db->nextIn;
 992         char           *bufend = db->rawbuf + db->dmasize;
 993         int             cnt, ret;
 994
 995         if (bufptr + count > bufend) {
 996                 int             partial = (int) (bufend - bufptr);
 997                 if (to_user) {
 998                         if ((cnt = translate_to_user(db, userbuf,
 999                                                      bufptr, partial)) < 0)
1000                                 return cnt;
1001                         ret = cnt;
1002                         if ((cnt = translate_to_user(db, userbuf + partial,
1003                                                      db->rawbuf,
1004                                                      count - partial)) < 0)
1005                                 return cnt;
1006                         ret += cnt;
1007                 } else {
1008                         if ((cnt = translate_from_user(db, bufptr, userbuf,
1009                                                        partial)) < 0)
1010                                 return cnt;
1011                         ret = cnt;
1012                         if ((cnt = translate_from_user(db, db->rawbuf,
1013                                                        userbuf + partial,
1014                                                        count - partial)) < 0)
1015                                 return cnt;
1016                         ret += cnt;
1017                 }
1018         } else {
1019                 if (to_user)
1020                         ret = translate_to_user(db, userbuf, bufptr, count);
1021                 else
1022                         ret = translate_from_user(db, bufptr, userbuf, count);
1023         }
1024
1025         return ret;
1026 }
1027
1028
1029 static ssize_t
1030 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1031 {
1032         struct au1550_state *s = (struct au1550_state *)file->private_data;
1033         struct dmabuf  *db = &s->dma_adc;
1034         DECLARE_WAITQUEUE(wait, current);
1035         ssize_t         ret;
1036         unsigned long   flags;
1037         int             cnt, usercnt, avail;
1038
1039         if (db->mapped)
1040                 return -ENXIO;
1041         if (!access_ok(VERIFY_WRITE, buffer, count))
1042                 return -EFAULT;
1043         ret = 0;
1044
1045         count *= db->cnt_factor;
1046
1047         down(&s->sem);
1048         add_wait_queue(&db->wait, &wait);
1049
1050         while (count > 0) {
1051                 /* wait for samples in ADC dma buffer
1052                 */
1053                 do {
1054                         spin_lock_irqsave(&s->lock, flags);
1055                         if (db->stopped)
1056                                 start_adc(s);
1057                         avail = db->count;
1058                         if (avail <= 0)
1059                                 __set_current_state(TASK_INTERRUPTIBLE);
1060                         spin_unlock_irqrestore(&s->lock, flags);
1061                         if (avail <= 0) {
1062                                 if (file->f_flags & O_NONBLOCK) {
1063                                         if (!ret)
1064                                                 ret = -EAGAIN;
1065                                         goto out;
1066                                 }
1067                                 up(&s->sem);
1068                                 schedule();
1069                                 if (signal_pending(current)) {
1070                                         if (!ret)
1071                                                 ret = -ERESTARTSYS;
1072                                         goto out2;
1073                                 }
1074                                 down(&s->sem);
1075                         }
1076                 } while (avail <= 0);
1077
1078                 /* copy from nextOut to user
1079                 */
1080                 if ((cnt = copy_dmabuf_user(db, buffer,
1081                                             count > avail ?
1082                                             avail : count, 1)) < 0) {
1083                         if (!ret)
1084                                 ret = -EFAULT;
1085                         goto out;
1086                 }
1087
1088                 spin_lock_irqsave(&s->lock, flags);
1089                 db->count -= cnt;
1090                 db->nextOut += cnt;
1091                 if (db->nextOut >= db->rawbuf + db->dmasize)
1092                         db->nextOut -= db->dmasize;
1093                 spin_unlock_irqrestore(&s->lock, flags);
1094
1095                 count -= cnt;
1096                 usercnt = cnt / db->cnt_factor;
1097                 buffer += usercnt;
1098                 ret += usercnt;
1099         }                       /* while (count > 0) */
1100
1101 out:
1102         up(&s->sem);
1103 out2:
1104         remove_wait_queue(&db->wait, &wait);
1105         set_current_state(TASK_RUNNING);
1106         return ret;
1107 }
1108
1109 static ssize_t
1110 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1111 {
1112         struct au1550_state *s = (struct au1550_state *)file->private_data;
1113         struct dmabuf  *db = &s->dma_dac;
1114         DECLARE_WAITQUEUE(wait, current);
1115         ssize_t         ret = 0;
1116         unsigned long   flags;
1117         int             cnt, usercnt, avail;
1118
1119         pr_debug("write: count=%d\n", count);
1120
1121         if (db->mapped)
1122                 return -ENXIO;
1123         if (!access_ok(VERIFY_READ, buffer, count))
1124                 return -EFAULT;
1125
1126         count *= db->cnt_factor;
1127
1128         down(&s->sem);
1129         add_wait_queue(&db->wait, &wait);
1130
1131         while (count > 0) {
1132                 /* wait for space in playback buffer
1133                 */
1134                 do {
1135                         spin_lock_irqsave(&s->lock, flags);
1136                         avail = (int) db->dmasize - db->count;
1137                         if (avail <= 0)
1138                                 __set_current_state(TASK_INTERRUPTIBLE);
1139                         spin_unlock_irqrestore(&s->lock, flags);
1140                         if (avail <= 0) {
1141                                 if (file->f_flags & O_NONBLOCK) {
1142                                         if (!ret)
1143                                                 ret = -EAGAIN;
1144                                         goto out;
1145                                 }
1146                                 up(&s->sem);
1147                                 schedule();
1148                                 if (signal_pending(current)) {
1149                                         if (!ret)
1150                                                 ret = -ERESTARTSYS;
1151                                         goto out2;
1152                                 }
1153                                 down(&s->sem);
1154                         }
1155                 } while (avail <= 0);
1156
1157                 /* copy from user to nextIn
1158                 */
1159                 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1160                                             count > avail ?
1161                                             avail : count, 0)) < 0) {
1162                         if (!ret)
1163                                 ret = -EFAULT;
1164                         goto out;
1165                 }
1166
1167                 spin_lock_irqsave(&s->lock, flags);
1168                 db->count += cnt;
1169                 db->nextIn += cnt;
1170                 if (db->nextIn >= db->rawbuf + db->dmasize)
1171                         db->nextIn -= db->dmasize;
1172
1173                 /* If the data is available, we want to keep two buffers
1174                  * on the dma queue.  If the queue count reaches zero,
1175                  * we know the dma has stopped.
1176                  */
1177                 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1178                         if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1179                                                         db->fragsize) == 0) {
1180                                 err("qcount < 2 and no ring room!");
1181                         }
1182                         db->nextOut += db->fragsize;
1183                         if (db->nextOut >= db->rawbuf + db->dmasize)
1184                                 db->nextOut -= db->dmasize;
1185                         db->total_bytes += db->dma_fragsize;
1186                         if (db->dma_qcount == 0)
1187                                 start_dac(s);
1188                         db->dma_qcount++;
1189                 }
1190                 spin_unlock_irqrestore(&s->lock, flags);
1191
1192                 count -= cnt;
1193                 usercnt = cnt / db->cnt_factor;
1194                 buffer += usercnt;
1195                 ret += usercnt;
1196         }                       /* while (count > 0) */
1197
1198 out:
1199         up(&s->sem);
1200 out2:
1201         remove_wait_queue(&db->wait, &wait);
1202         set_current_state(TASK_RUNNING);
1203         return ret;
1204 }
1205
1206
1207 /* No kernel lock - we have our own spinlock */
1208 static unsigned int
1209 au1550_poll(struct file *file, struct poll_table_struct *wait)
1210 {
1211         struct au1550_state *s = (struct au1550_state *)file->private_data;
1212         unsigned long   flags;
1213         unsigned int    mask = 0;
1214
1215         if (file->f_mode & FMODE_WRITE) {
1216                 if (!s->dma_dac.ready)
1217                         return 0;
1218                 poll_wait(file, &s->dma_dac.wait, wait);
1219         }
1220         if (file->f_mode & FMODE_READ) {
1221                 if (!s->dma_adc.ready)
1222                         return 0;
1223                 poll_wait(file, &s->dma_adc.wait, wait);
1224         }
1225
1226         spin_lock_irqsave(&s->lock, flags);
1227
1228         if (file->f_mode & FMODE_READ) {
1229                 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1230                         mask |= POLLIN | POLLRDNORM;
1231         }
1232         if (file->f_mode & FMODE_WRITE) {
1233                 if (s->dma_dac.mapped) {
1234                         if (s->dma_dac.count >=
1235                             (signed)s->dma_dac.dma_fragsize)
1236                                 mask |= POLLOUT | POLLWRNORM;
1237                 } else {
1238                         if ((signed) s->dma_dac.dmasize >=
1239                             s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1240                                 mask |= POLLOUT | POLLWRNORM;
1241                 }
1242         }
1243         spin_unlock_irqrestore(&s->lock, flags);
1244         return mask;
1245 }
1246
1247 static int
1248 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1249 {
1250         struct au1550_state *s = (struct au1550_state *)file->private_data;
1251         struct dmabuf  *db;
1252         unsigned long   size;
1253         int ret = 0;
1254
1255         lock_kernel();
1256         down(&s->sem);
1257         if (vma->vm_flags & VM_WRITE)
1258                 db = &s->dma_dac;
1259         else if (vma->vm_flags & VM_READ)
1260                 db = &s->dma_adc;
1261         else {
1262                 ret = -EINVAL;
1263                 goto out;
1264         }
1265         if (vma->vm_pgoff != 0) {
1266                 ret = -EINVAL;
1267                 goto out;
1268         }
1269         size = vma->vm_end - vma->vm_start;
1270         if (size > (PAGE_SIZE << db->buforder)) {
1271                 ret = -EINVAL;
1272                 goto out;
1273         }
1274         if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1275                              size, vma->vm_page_prot)) {
1276                 ret = -EAGAIN;
1277                 goto out;
1278         }
1279         vma->vm_flags &= ~VM_IO;
1280         db->mapped = 1;
1281 out:
1282         up(&s->sem);
1283         unlock_kernel();
1284         return ret;
1285 }
1286
1287 #ifdef DEBUG
1288 static struct ioctl_str_t {
1289         unsigned int    cmd;
1290         const char     *str;
1291 } ioctl_str[] = {
1292         {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1293         {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1294         {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1295         {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1296         {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1297         {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1298         {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1299         {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1300         {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1301         {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1302         {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1303         {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1304         {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1305         {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1306         {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1307         {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1308         {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1309         {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1310         {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1311         {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1312         {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1313         {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1314         {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1315         {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1316         {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1317         {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1318         {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1319         {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1320         {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1321         {OSS_GETVERSION, "OSS_GETVERSION"},
1322         {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1323         {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1324         {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1325         {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1326 };
1327 #endif
1328
1329 static int
1330 dma_count_done(struct dmabuf *db)
1331 {
1332         if (db->stopped)
1333                 return 0;
1334
1335         return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1336 }
1337
1338
1339 static int
1340 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1341                                                         unsigned long arg)
1342 {
1343         struct au1550_state *s = (struct au1550_state *)file->private_data;
1344         unsigned long   flags;
1345         audio_buf_info  abinfo;
1346         count_info      cinfo;
1347         int             count;
1348         int             val, mapped, ret, diff;
1349
1350         mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1351                 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1352
1353 #ifdef DEBUG
1354         for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
1355                 if (ioctl_str[count].cmd == cmd)
1356                         break;
1357         }
1358         if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0]))
1359                 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1360         else
1361                 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1362 #endif
1363
1364         switch (cmd) {
1365         case OSS_GETVERSION:
1366                 return put_user(SOUND_VERSION, (int *) arg);
1367
1368         case SNDCTL_DSP_SYNC:
1369                 if (file->f_mode & FMODE_WRITE)
1370                         return drain_dac(s, file->f_flags & O_NONBLOCK);
1371                 return 0;
1372
1373         case SNDCTL_DSP_SETDUPLEX:
1374                 return 0;
1375
1376         case SNDCTL_DSP_GETCAPS:
1377                 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1378                                 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1379
1380         case SNDCTL_DSP_RESET:
1381                 if (file->f_mode & FMODE_WRITE) {
1382                         stop_dac(s);
1383                         synchronize_irq();
1384                         s->dma_dac.count = s->dma_dac.total_bytes = 0;
1385                         s->dma_dac.nextIn = s->dma_dac.nextOut =
1386                                 s->dma_dac.rawbuf;
1387                 }
1388                 if (file->f_mode & FMODE_READ) {
1389                         stop_adc(s);
1390                         synchronize_irq();
1391                         s->dma_adc.count = s->dma_adc.total_bytes = 0;
1392                         s->dma_adc.nextIn = s->dma_adc.nextOut =
1393                                 s->dma_adc.rawbuf;
1394                 }
1395                 return 0;
1396
1397         case SNDCTL_DSP_SPEED:
1398                 if (get_user(val, (int *) arg))
1399                         return -EFAULT;
1400                 if (val >= 0) {
1401                         if (file->f_mode & FMODE_READ) {
1402                                 stop_adc(s);
1403                                 set_adc_rate(s, val);
1404                         }
1405                         if (file->f_mode & FMODE_WRITE) {
1406                                 stop_dac(s);
1407                                 set_dac_rate(s, val);
1408                         }
1409                         if (s->open_mode & FMODE_READ)
1410                                 if ((ret = prog_dmabuf_adc(s)))
1411                                         return ret;
1412                         if (s->open_mode & FMODE_WRITE)
1413                                 if ((ret = prog_dmabuf_dac(s)))
1414                                         return ret;
1415                 }
1416                 return put_user((file->f_mode & FMODE_READ) ?
1417                                 s->dma_adc.sample_rate :
1418                                 s->dma_dac.sample_rate,
1419                                 (int *)arg);
1420
1421         case SNDCTL_DSP_STEREO:
1422                 if (get_user(val, (int *) arg))
1423                         return -EFAULT;
1424                 if (file->f_mode & FMODE_READ) {
1425                         stop_adc(s);
1426                         s->dma_adc.num_channels = val ? 2 : 1;
1427                         if ((ret = prog_dmabuf_adc(s)))
1428                                 return ret;
1429                 }
1430                 if (file->f_mode & FMODE_WRITE) {
1431                         stop_dac(s);
1432                         s->dma_dac.num_channels = val ? 2 : 1;
1433                         if (s->codec_ext_caps & AC97_EXT_DACS) {
1434                                 /* disable surround and center/lfe in AC'97
1435                                 */
1436                                 u16 ext_stat = rdcodec(s->codec,
1437                                                        AC97_EXTENDED_STATUS);
1438                                 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1439                                         ext_stat | (AC97_EXTSTAT_PRI |
1440                                                     AC97_EXTSTAT_PRJ |
1441                                                     AC97_EXTSTAT_PRK));
1442                         }
1443                         if ((ret = prog_dmabuf_dac(s)))
1444                                 return ret;
1445                 }
1446                 return 0;
1447
1448         case SNDCTL_DSP_CHANNELS:
1449                 if (get_user(val, (int *) arg))
1450                         return -EFAULT;
1451                 if (val != 0) {
1452                         if (file->f_mode & FMODE_READ) {
1453                                 if (val < 0 || val > 2)
1454                                         return -EINVAL;
1455                                 stop_adc(s);
1456                                 s->dma_adc.num_channels = val;
1457                                 if ((ret = prog_dmabuf_adc(s)))
1458                                         return ret;
1459                         }
1460                         if (file->f_mode & FMODE_WRITE) {
1461                                 switch (val) {
1462                                 case 1:
1463                                 case 2:
1464                                         break;
1465                                 case 3:
1466                                 case 5:
1467                                         return -EINVAL;
1468                                 case 4:
1469                                         if (!(s->codec_ext_caps &
1470                                               AC97_EXTID_SDAC))
1471                                                 return -EINVAL;
1472                                         break;
1473                                 case 6:
1474                                         if ((s->codec_ext_caps &
1475                                              AC97_EXT_DACS) != AC97_EXT_DACS)
1476                                                 return -EINVAL;
1477                                         break;
1478                                 default:
1479                                         return -EINVAL;
1480                                 }
1481
1482                                 stop_dac(s);
1483                                 if (val <= 2 &&
1484                                     (s->codec_ext_caps & AC97_EXT_DACS)) {
1485                                         /* disable surround and center/lfe
1486                                          * channels in AC'97
1487                                          */
1488                                         u16             ext_stat =
1489                                                 rdcodec(s->codec,
1490                                                         AC97_EXTENDED_STATUS);
1491                                         wrcodec(s->codec,
1492                                                 AC97_EXTENDED_STATUS,
1493                                                 ext_stat | (AC97_EXTSTAT_PRI |
1494                                                             AC97_EXTSTAT_PRJ |
1495                                                             AC97_EXTSTAT_PRK));
1496                                 } else if (val >= 4) {
1497                                         /* enable surround, center/lfe
1498                                          * channels in AC'97
1499                                          */
1500                                         u16             ext_stat =
1501                                                 rdcodec(s->codec,
1502                                                         AC97_EXTENDED_STATUS);
1503                                         ext_stat &= ~AC97_EXTSTAT_PRJ;
1504                                         if (val == 6)
1505                                                 ext_stat &=
1506                                                         ~(AC97_EXTSTAT_PRI |
1507                                                           AC97_EXTSTAT_PRK);
1508                                         wrcodec(s->codec,
1509                                                 AC97_EXTENDED_STATUS,
1510                                                 ext_stat);
1511                                 }
1512
1513                                 s->dma_dac.num_channels = val;
1514                                 if ((ret = prog_dmabuf_dac(s)))
1515                                         return ret;
1516                         }
1517                 }
1518                 return put_user(val, (int *) arg);
1519
1520         case SNDCTL_DSP_GETFMTS:        /* Returns a mask */
1521                 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1522
1523         case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1524                 if (get_user(val, (int *) arg))
1525                         return -EFAULT;
1526                 if (val != AFMT_QUERY) {
1527                         if (file->f_mode & FMODE_READ) {
1528                                 stop_adc(s);
1529                                 if (val == AFMT_S16_LE)
1530                                         s->dma_adc.sample_size = 16;
1531                                 else {
1532                                         val = AFMT_U8;
1533                                         s->dma_adc.sample_size = 8;
1534                                 }
1535                                 if ((ret = prog_dmabuf_adc(s)))
1536                                         return ret;
1537                         }
1538                         if (file->f_mode & FMODE_WRITE) {
1539                                 stop_dac(s);
1540                                 if (val == AFMT_S16_LE)
1541                                         s->dma_dac.sample_size = 16;
1542                                 else {
1543                                         val = AFMT_U8;
1544                                         s->dma_dac.sample_size = 8;
1545                                 }
1546                                 if ((ret = prog_dmabuf_dac(s)))
1547                                         return ret;
1548                         }
1549                 } else {
1550                         if (file->f_mode & FMODE_READ)
1551                                 val = (s->dma_adc.sample_size == 16) ?
1552                                         AFMT_S16_LE : AFMT_U8;
1553                         else
1554                                 val = (s->dma_dac.sample_size == 16) ?
1555                                         AFMT_S16_LE : AFMT_U8;
1556                 }
1557                 return put_user(val, (int *) arg);
1558
1559         case SNDCTL_DSP_POST:
1560                 return 0;
1561
1562         case SNDCTL_DSP_GETTRIGGER:
1563                 val = 0;
1564                 spin_lock_irqsave(&s->lock, flags);
1565                 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1566                         val |= PCM_ENABLE_INPUT;
1567                 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1568                         val |= PCM_ENABLE_OUTPUT;
1569                 spin_unlock_irqrestore(&s->lock, flags);
1570                 return put_user(val, (int *) arg);
1571
1572         case SNDCTL_DSP_SETTRIGGER:
1573                 if (get_user(val, (int *) arg))
1574                         return -EFAULT;
1575                 if (file->f_mode & FMODE_READ) {
1576                         if (val & PCM_ENABLE_INPUT) {
1577                                 spin_lock_irqsave(&s->lock, flags);
1578                                 start_adc(s);
1579                                 spin_unlock_irqrestore(&s->lock, flags);
1580                         } else
1581                                 stop_adc(s);
1582                 }
1583                 if (file->f_mode & FMODE_WRITE) {
1584                         if (val & PCM_ENABLE_OUTPUT) {
1585                                 spin_lock_irqsave(&s->lock, flags);
1586                                 start_dac(s);
1587                                 spin_unlock_irqrestore(&s->lock, flags);
1588                         } else
1589                                 stop_dac(s);
1590                 }
1591                 return 0;
1592
1593         case SNDCTL_DSP_GETOSPACE:
1594                 if (!(file->f_mode & FMODE_WRITE))
1595                         return -EINVAL;
1596                 abinfo.fragsize = s->dma_dac.fragsize;
1597                 spin_lock_irqsave(&s->lock, flags);
1598                 count = s->dma_dac.count;
1599                 count -= dma_count_done(&s->dma_dac);
1600                 spin_unlock_irqrestore(&s->lock, flags);
1601                 if (count < 0)
1602                         count = 0;
1603                 abinfo.bytes = (s->dma_dac.dmasize - count) /
1604                         s->dma_dac.cnt_factor;
1605                 abinfo.fragstotal = s->dma_dac.numfrag;
1606                 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1607                 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1608                 return copy_to_user((void *) arg, &abinfo,
1609                                     sizeof(abinfo)) ? -EFAULT : 0;
1610
1611         case SNDCTL_DSP_GETISPACE:
1612                 if (!(file->f_mode & FMODE_READ))
1613                         return -EINVAL;
1614                 abinfo.fragsize = s->dma_adc.fragsize;
1615                 spin_lock_irqsave(&s->lock, flags);
1616                 count = s->dma_adc.count;
1617                 count += dma_count_done(&s->dma_adc);
1618                 spin_unlock_irqrestore(&s->lock, flags);
1619                 if (count < 0)
1620                         count = 0;
1621                 abinfo.bytes = count / s->dma_adc.cnt_factor;
1622                 abinfo.fragstotal = s->dma_adc.numfrag;
1623                 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1624                 return copy_to_user((void *) arg, &abinfo,
1625                                     sizeof(abinfo)) ? -EFAULT : 0;
1626
1627         case SNDCTL_DSP_NONBLOCK:
1628                 file->f_flags |= O_NONBLOCK;
1629                 return 0;
1630
1631         case SNDCTL_DSP_GETODELAY:
1632                 if (!(file->f_mode & FMODE_WRITE))
1633                         return -EINVAL;
1634                 spin_lock_irqsave(&s->lock, flags);
1635                 count = s->dma_dac.count;
1636                 count -= dma_count_done(&s->dma_dac);
1637                 spin_unlock_irqrestore(&s->lock, flags);
1638                 if (count < 0)
1639                         count = 0;
1640                 count /= s->dma_dac.cnt_factor;
1641                 return put_user(count, (int *) arg);
1642
1643         case SNDCTL_DSP_GETIPTR:
1644                 if (!(file->f_mode & FMODE_READ))
1645                         return -EINVAL;
1646                 spin_lock_irqsave(&s->lock, flags);
1647                 cinfo.bytes = s->dma_adc.total_bytes;
1648                 count = s->dma_adc.count;
1649                 if (!s->dma_adc.stopped) {
1650                         diff = dma_count_done(&s->dma_adc);
1651                         count += diff;
1652                         cinfo.bytes += diff;
1653                         cinfo.ptr =  virt_to_phys(s->dma_adc.nextIn) + diff -
1654                                 virt_to_phys(s->dma_adc.rawbuf);
1655                 } else
1656                         cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1657                                 virt_to_phys(s->dma_adc.rawbuf);
1658                 if (s->dma_adc.mapped)
1659                         s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1660                 spin_unlock_irqrestore(&s->lock, flags);
1661                 if (count < 0)
1662                         count = 0;
1663                 cinfo.blocks = count >> s->dma_adc.fragshift;
1664                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1665
1666         case SNDCTL_DSP_GETOPTR:
1667                 if (!(file->f_mode & FMODE_READ))
1668                         return -EINVAL;
1669                 spin_lock_irqsave(&s->lock, flags);
1670                 cinfo.bytes = s->dma_dac.total_bytes;
1671                 count = s->dma_dac.count;
1672                 if (!s->dma_dac.stopped) {
1673                         diff = dma_count_done(&s->dma_dac);
1674                         count -= diff;
1675                         cinfo.bytes += diff;
1676                         cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1677                                 virt_to_phys(s->dma_dac.rawbuf);
1678                 } else
1679                         cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1680                                 virt_to_phys(s->dma_dac.rawbuf);
1681                 if (s->dma_dac.mapped)
1682                         s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1683                 spin_unlock_irqrestore(&s->lock, flags);
1684                 if (count < 0)
1685                         count = 0;
1686                 cinfo.blocks = count >> s->dma_dac.fragshift;
1687                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1688
1689         case SNDCTL_DSP_GETBLKSIZE:
1690                 if (file->f_mode & FMODE_WRITE)
1691                         return put_user(s->dma_dac.fragsize, (int *) arg);
1692                 else
1693                         return put_user(s->dma_adc.fragsize, (int *) arg);
1694
1695         case SNDCTL_DSP_SETFRAGMENT:
1696                 if (get_user(val, (int *) arg))
1697                         return -EFAULT;
1698                 if (file->f_mode & FMODE_READ) {
1699                         stop_adc(s);
1700                         s->dma_adc.ossfragshift = val & 0xffff;
1701                         s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1702                         if (s->dma_adc.ossfragshift < 4)
1703                                 s->dma_adc.ossfragshift = 4;
1704                         if (s->dma_adc.ossfragshift > 15)
1705                                 s->dma_adc.ossfragshift = 15;
1706                         if (s->dma_adc.ossmaxfrags < 4)
1707                                 s->dma_adc.ossmaxfrags = 4;
1708                         if ((ret = prog_dmabuf_adc(s)))
1709                                 return ret;
1710                 }
1711                 if (file->f_mode & FMODE_WRITE) {
1712                         stop_dac(s);
1713                         s->dma_dac.ossfragshift = val & 0xffff;
1714                         s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1715                         if (s->dma_dac.ossfragshift < 4)
1716                                 s->dma_dac.ossfragshift = 4;
1717                         if (s->dma_dac.ossfragshift > 15)
1718                                 s->dma_dac.ossfragshift = 15;
1719                         if (s->dma_dac.ossmaxfrags < 4)
1720                                 s->dma_dac.ossmaxfrags = 4;
1721                         if ((ret = prog_dmabuf_dac(s)))
1722                                 return ret;
1723                 }
1724                 return 0;
1725
1726         case SNDCTL_DSP_SUBDIVIDE:
1727                 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1728                     (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1729                         return -EINVAL;
1730                 if (get_user(val, (int *) arg))
1731                         return -EFAULT;
1732                 if (val != 1 && val != 2 && val != 4)
1733                         return -EINVAL;
1734                 if (file->f_mode & FMODE_READ) {
1735                         stop_adc(s);
1736                         s->dma_adc.subdivision = val;
1737                         if ((ret = prog_dmabuf_adc(s)))
1738                                 return ret;
1739                 }
1740                 if (file->f_mode & FMODE_WRITE) {
1741                         stop_dac(s);
1742                         s->dma_dac.subdivision = val;
1743                         if ((ret = prog_dmabuf_dac(s)))
1744                                 return ret;
1745                 }
1746                 return 0;
1747
1748         case SOUND_PCM_READ_RATE:
1749                 return put_user((file->f_mode & FMODE_READ) ?
1750                                 s->dma_adc.sample_rate :
1751                                 s->dma_dac.sample_rate,
1752                                 (int *)arg);
1753
1754         case SOUND_PCM_READ_CHANNELS:
1755                 if (file->f_mode & FMODE_READ)
1756                         return put_user(s->dma_adc.num_channels, (int *)arg);
1757                 else
1758                         return put_user(s->dma_dac.num_channels, (int *)arg);
1759
1760         case SOUND_PCM_READ_BITS:
1761                 if (file->f_mode & FMODE_READ)
1762                         return put_user(s->dma_adc.sample_size, (int *)arg);
1763                 else
1764                         return put_user(s->dma_dac.sample_size, (int *)arg);
1765
1766         case SOUND_PCM_WRITE_FILTER:
1767         case SNDCTL_DSP_SETSYNCRO:
1768         case SOUND_PCM_READ_FILTER:
1769                 return -EINVAL;
1770         }
1771
1772         return mixdev_ioctl(s->codec, cmd, arg);
1773 }
1774
1775
1776 static int
1777 au1550_open(struct inode *inode, struct file *file)
1778 {
1779         int             minor = MINOR(inode->i_rdev);
1780         DECLARE_WAITQUEUE(wait, current);
1781         struct au1550_state *s = &au1550_state;
1782         int             ret;
1783
1784 #ifdef DEBUG
1785         if (file->f_flags & O_NONBLOCK)
1786                 pr_debug("open: non-blocking\n");
1787         else
1788                 pr_debug("open: blocking\n");
1789 #endif
1790
1791         file->private_data = s;
1792         /* wait for device to become free */
1793         down(&s->open_sem);
1794         while (s->open_mode & file->f_mode) {
1795                 if (file->f_flags & O_NONBLOCK) {
1796                         up(&s->open_sem);
1797                         return -EBUSY;
1798                 }
1799                 add_wait_queue(&s->open_wait, &wait);
1800                 __set_current_state(TASK_INTERRUPTIBLE);
1801                 up(&s->open_sem);
1802                 schedule();
1803                 remove_wait_queue(&s->open_wait, &wait);
1804                 set_current_state(TASK_RUNNING);
1805                 if (signal_pending(current))
1806                         return -ERESTARTSYS;
1807                 down(&s->open_sem);
1808         }
1809
1810         stop_dac(s);
1811         stop_adc(s);
1812
1813         if (file->f_mode & FMODE_READ) {
1814                 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1815                         s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1816                 s->dma_adc.num_channels = 1;
1817                 s->dma_adc.sample_size = 8;
1818                 set_adc_rate(s, 8000);
1819                 if ((minor & 0xf) == SND_DEV_DSP16)
1820                         s->dma_adc.sample_size = 16;
1821         }
1822
1823         if (file->f_mode & FMODE_WRITE) {
1824                 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1825                         s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1826                 s->dma_dac.num_channels = 1;
1827                 s->dma_dac.sample_size = 8;
1828                 set_dac_rate(s, 8000);
1829                 if ((minor & 0xf) == SND_DEV_DSP16)
1830                         s->dma_dac.sample_size = 16;
1831         }
1832
1833         if (file->f_mode & FMODE_READ) {
1834                 if ((ret = prog_dmabuf_adc(s)))
1835                         return ret;
1836         }
1837         if (file->f_mode & FMODE_WRITE) {
1838                 if ((ret = prog_dmabuf_dac(s)))
1839                         return ret;
1840         }
1841
1842         s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1843         up(&s->open_sem);
1844         init_MUTEX(&s->sem);
1845         return 0;
1846 }
1847
1848 static int
1849 au1550_release(struct inode *inode, struct file *file)
1850 {
1851         struct au1550_state *s = (struct au1550_state *)file->private_data;
1852
1853         lock_kernel();
1854
1855         if (file->f_mode & FMODE_WRITE) {
1856                 unlock_kernel();
1857                 drain_dac(s, file->f_flags & O_NONBLOCK);
1858                 lock_kernel();
1859         }
1860
1861         down(&s->open_sem);
1862         if (file->f_mode & FMODE_WRITE) {
1863                 stop_dac(s);
1864                 kfree(s->dma_dac.rawbuf);
1865                 s->dma_dac.rawbuf = NULL;
1866         }
1867         if (file->f_mode & FMODE_READ) {
1868                 stop_adc(s);
1869                 kfree(s->dma_adc.rawbuf);
1870                 s->dma_adc.rawbuf = NULL;
1871         }
1872         s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1873         up(&s->open_sem);
1874         wake_up(&s->open_wait);
1875         unlock_kernel();
1876         return 0;
1877 }
1878
1879 static /*const */ struct file_operations au1550_audio_fops = {
1880         owner:          THIS_MODULE,
1881         llseek:         au1550_llseek,
1882         read:           au1550_read,
1883         write:          au1550_write,
1884         poll:           au1550_poll,
1885         ioctl:          au1550_ioctl,
1886         mmap:           au1550_mmap,
1887         open:           au1550_open,
1888         release:        au1550_release,
1889 };
1890
1891 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1892 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1893
1894 static int __devinit
1895 au1550_probe(void)
1896 {
1897         struct au1550_state *s = &au1550_state;
1898         int             val;
1899
1900         memset(s, 0, sizeof(struct au1550_state));
1901
1902         init_waitqueue_head(&s->dma_adc.wait);
1903         init_waitqueue_head(&s->dma_dac.wait);
1904         init_waitqueue_head(&s->open_wait);
1905         init_MUTEX(&s->open_sem);
1906         spin_lock_init(&s->lock);
1907
1908         s->codec = ac97_alloc_codec();
1909         if(s->codec == NULL) {
1910                 err("Out of memory");
1911                 return -1;
1912         }
1913         s->codec->private_data = s;
1914         s->codec->id = 0;
1915         s->codec->codec_read = rdcodec;
1916         s->codec->codec_write = wrcodec;
1917         s->codec->codec_wait = waitcodec;
1918
1919         if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1920                             0x30, "Au1550 AC97")) {
1921                 err("AC'97 ports in use");
1922         }
1923
1924         /* Allocate the DMA Channels
1925         */
1926         if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1927             DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1928                 err("Can't get DAC DMA");
1929                 goto err_dma1;
1930         }
1931         au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1932         if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1933                                         NUM_DBDMA_DESCRIPTORS) == 0) {
1934                 err("Can't get DAC DMA descriptors");
1935                 goto err_dma1;
1936         }
1937
1938         if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1939             DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1940                 err("Can't get ADC DMA");
1941                 goto err_dma2;
1942         }
1943         au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1944         if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1945                                         NUM_DBDMA_DESCRIPTORS) == 0) {
1946                 err("Can't get ADC DMA descriptors");
1947                 goto err_dma2;
1948         }
1949
1950         pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1951
1952         /* register devices */
1953
1954         if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1955                 goto err_dev1;
1956         if ((s->codec->dev_mixer =
1957              register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1958                 goto err_dev2;
1959
1960         /* The GPIO for the appropriate PSC was configured by the
1961          * board specific start up.
1962          *
1963          * configure PSC for AC'97
1964          */
1965         au_writel(0, AC97_PSC_CTRL);    /* Disable PSC */
1966         au_sync();
1967         au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1968         au_sync();
1969
1970         /* cold reset the AC'97
1971         */
1972         au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1973         au_sync();
1974         au1550_delay(10);
1975         au_writel(0, PSC_AC97RST);
1976         au_sync();
1977
1978         /* need to delay around 500msec(bleech) to give
1979            some CODECs enough time to wakeup */
1980         au1550_delay(500);
1981
1982         /* warm reset the AC'97 to start the bitclk
1983         */
1984         au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1985         au_sync();
1986         udelay(100);
1987         au_writel(0, PSC_AC97RST);
1988         au_sync();
1989
1990         /* Enable PSC
1991         */
1992         au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1993         au_sync();
1994
1995         /* Wait for PSC ready.
1996         */
1997         do {
1998                 val = readl((void *)PSC_AC97STAT);
1999                 au_sync();
2000         } while ((val & PSC_AC97STAT_SR) == 0);
2001
2002         /* Configure AC97 controller.
2003          * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
2004          */
2005         val = PSC_AC97CFG_SET_LEN(16);
2006         val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2007
2008         /* Enable device so we can at least
2009          * talk over the AC-link.
2010          */
2011         au_writel(val, PSC_AC97CFG);
2012         au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2013         au_sync();
2014         val |= PSC_AC97CFG_DE_ENABLE;
2015         au_writel(val, PSC_AC97CFG);
2016         au_sync();
2017
2018         /* Wait for Device ready.
2019         */
2020         do {
2021                 val = readl((void *)PSC_AC97STAT);
2022                 au_sync();
2023         } while ((val & PSC_AC97STAT_DR) == 0);
2024
2025         /* codec init */
2026         if (!ac97_probe_codec(s->codec))
2027                 goto err_dev3;
2028
2029         s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2030         s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2031         pr_info("AC'97 Base/Extended ID = %04x/%04x",
2032              s->codec_base_caps, s->codec_ext_caps);
2033
2034         if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2035                 /* codec does not support VRA
2036                 */
2037                 s->no_vra = 1;
2038         } else if (!vra) {
2039                 /* Boot option says disable VRA
2040                 */
2041                 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2042                 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2043                         ac97_extstat & ~AC97_EXTSTAT_VRA);
2044                 s->no_vra = 1;
2045         }
2046         if (s->no_vra)
2047                 pr_info("no VRA, interpolating and decimating");
2048
2049         /* set mic to be the recording source */
2050         val = SOUND_MASK_MIC;
2051         mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2052                      (unsigned long) &val);
2053
2054         return 0;
2055
2056  err_dev3:
2057         unregister_sound_mixer(s->codec->dev_mixer);
2058  err_dev2:
2059         unregister_sound_dsp(s->dev_audio);
2060  err_dev1:
2061         au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2062  err_dma2:
2063         au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2064  err_dma1:
2065         release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2066
2067         ac97_release_codec(s->codec);
2068         return -1;
2069 }
2070
2071 static void __devinit
2072 au1550_remove(void)
2073 {
2074         struct au1550_state *s = &au1550_state;
2075
2076         if (!s)
2077                 return;
2078         synchronize_irq();
2079         au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2080         au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2081         release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2082         unregister_sound_dsp(s->dev_audio);
2083         unregister_sound_mixer(s->codec->dev_mixer);
2084         ac97_release_codec(s->codec);
2085 }
2086
2087 static int __init
2088 init_au1550(void)
2089 {
2090         return au1550_probe();
2091 }
2092
2093 static void __exit
2094 cleanup_au1550(void)
2095 {
2096         au1550_remove();
2097 }
2098
2099 module_init(init_au1550);
2100 module_exit(cleanup_au1550);
2101
2102 #ifndef MODULE
2103
2104 static int __init
2105 au1550_setup(char *options)
2106 {
2107         char           *this_opt;
2108
2109         if (!options || !*options)
2110                 return 0;
2111
2112         while ((this_opt = strsep(&options, ","))) {
2113                 if (!*this_opt)
2114                         continue;
2115                 if (!strncmp(this_opt, "vra", 3)) {
2116                         vra = 1;
2117                 }
2118         }
2119
2120         return 1;
2121 }
2122
2123 __setup("au1550_audio=", au1550_setup);
2124
2125 #endif /* MODULE */