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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/bitops.h>
  51 #include <linux/spinlock.h>
  52 #include <linux/smp_lock.h>
  53 #include <linux/ac97_codec.h>
  54 #include <linux/mutex.h>
  55
  56 #include <asm/io.h>
  57 #include <asm/uaccess.h>
  58 #include <asm/hardirq.h>
  59 #include <asm/mach-au1x00/au1xxx_psc.h>
  60 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  61 #include <asm/mach-au1x00/au1xxx.h>
  62
  63 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
  64
  65 /* misc stuff */
  66 #define POLL_COUNT   0x50000
  67 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
  68
  69 /* The number of DBDMA ring descriptors to allocate.  No sense making
  70  * this too large....if you can't keep up with a few you aren't likely
  71  * to be able to with lots of them, either.
  72  */
  73 #define NUM_DBDMA_DESCRIPTORS 4
  74
  75 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
  76
  77 /* Boot options
  78  * 0 = no VRA, 1 = use VRA if codec supports it
  79  */
  80 static int      vra = 1;
  81 module_param(vra, bool, 0);
  82 MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
  83
  84 static struct au1550_state {
  85         /* soundcore stuff */
  86         int             dev_audio;
  87
  88         struct ac97_codec *codec;
  89         unsigned        codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
  90         unsigned        codec_ext_caps;  /* AC'97 reg 28h, "Extended Audio ID" */
  91         int             no_vra;         /* do not use VRA */
  92
  93         spinlock_t      lock;
  94         struct mutex open_mutex;
  95         struct mutex sem;
  96         fmode_t          open_mode;
  97         wait_queue_head_t open_wait;
  98
  99         struct dmabuf {
 100                 u32             dmanr;
 101                 unsigned        sample_rate;
 102                 unsigned        src_factor;
 103                 unsigned        sample_size;
 104                 int             num_channels;
 105                 int             dma_bytes_per_sample;
 106                 int             user_bytes_per_sample;
 107                 int             cnt_factor;
 108
 109                 void            *rawbuf;
 110                 unsigned        buforder;
 111                 unsigned        numfrag;
 112                 unsigned        fragshift;
 113                 void            *nextIn;
 114                 void            *nextOut;
 115                 int             count;
 116                 unsigned        total_bytes;
 117                 unsigned        error;
 118                 wait_queue_head_t wait;
 119
 120                 /* redundant, but makes calculations easier */
 121                 unsigned        fragsize;
 122                 unsigned        dma_fragsize;
 123                 unsigned        dmasize;
 124                 unsigned        dma_qcount;
 125
 126                 /* OSS stuff */
 127                 unsigned        mapped:1;
 128                 unsigned        ready:1;
 129                 unsigned        stopped:1;
 130                 unsigned        ossfragshift;
 131                 int             ossmaxfrags;
 132                 unsigned        subdivision;
 133         } dma_dac, dma_adc;
 134 } au1550_state;
 135
 136 static unsigned
 137 ld2(unsigned int x)
 138 {
 139         unsigned        r = 0;
 140
 141         if (x >= 0x10000) {
 142                 x >>= 16;
 143                 r += 16;
 144         }
 145         if (x >= 0x100) {
 146                 x >>= 8;
 147                 r += 8;
 148         }
 149         if (x >= 0x10) {
 150                 x >>= 4;
 151                 r += 4;
 152         }
 153         if (x >= 4) {
 154                 x >>= 2;
 155                 r += 2;
 156         }
 157         if (x >= 2)
 158                 r++;
 159         return r;
 160 }
 161
 162 static void
 163 au1550_delay(int msec)
 164 {
 165         unsigned long   tmo;
 166         signed long     tmo2;
 167
 168         if (in_interrupt())
 169                 return;
 170
 171         tmo = jiffies + (msec * HZ) / 1000;
 172         for (;;) {
 173                 tmo2 = tmo - jiffies;
 174                 if (tmo2 <= 0)
 175                         break;
 176                 schedule_timeout(tmo2);
 177         }
 178 }
 179
 180 static u16
 181 rdcodec(struct ac97_codec *codec, u8 addr)
 182 {
 183         struct au1550_state *s = (struct au1550_state *)codec->private_data;
 184         unsigned long   flags;
 185         u32             cmd, val;
 186         u16             data;
 187         int             i;
 188
 189         spin_lock_irqsave(&s->lock, flags);
 190
 191         for (i = 0; i < POLL_COUNT; i++) {
 192                 val = au_readl(PSC_AC97STAT);
 193                 au_sync();
 194                 if (!(val & PSC_AC97STAT_CP))
 195                         break;
 196         }
 197         if (i == POLL_COUNT)
 198                 err("rdcodec: codec cmd pending expired!");
 199
 200         cmd = (u32)PSC_AC97CDC_INDX(addr);
 201         cmd |= PSC_AC97CDC_RD;  /* read command */
 202         au_writel(cmd, PSC_AC97CDC);
 203         au_sync();
 204
 205         /* now wait for the data
 206         */
 207         for (i = 0; i < POLL_COUNT; i++) {
 208                 val = au_readl(PSC_AC97STAT);
 209                 au_sync();
 210                 if (!(val & PSC_AC97STAT_CP))
 211                         break;
 212         }
 213         if (i == POLL_COUNT) {
 214                 err("rdcodec: read poll expired!");
 215                 data = 0;
 216                 goto out;
 217         }
 218
 219         /* wait for command done?
 220         */
 221         for (i = 0; i < POLL_COUNT; i++) {
 222                 val = au_readl(PSC_AC97EVNT);
 223                 au_sync();
 224                 if (val & PSC_AC97EVNT_CD)
 225                         break;
 226         }
 227         if (i == POLL_COUNT) {
 228                 err("rdcodec: read cmdwait expired!");
 229                 data = 0;
 230                 goto out;
 231         }
 232
 233         data = au_readl(PSC_AC97CDC) & 0xffff;
 234         au_sync();
 235
 236         /* Clear command done event.
 237         */
 238         au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
 239         au_sync();
 240
 241  out:
 242         spin_unlock_irqrestore(&s->lock, flags);
 243
 244         return data;
 245 }
 246
 247
 248 static void
 249 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
 250 {
 251         struct au1550_state *s = (struct au1550_state *)codec->private_data;
 252         unsigned long   flags;
 253         u32             cmd, val;
 254         int             i;
 255
 256         spin_lock_irqsave(&s->lock, flags);
 257
 258         for (i = 0; i < POLL_COUNT; i++) {
 259                 val = au_readl(PSC_AC97STAT);
 260                 au_sync();
 261                 if (!(val & PSC_AC97STAT_CP))
 262                         break;
 263         }
 264         if (i == POLL_COUNT)
 265                 err("wrcodec: codec cmd pending expired!");
 266
 267         cmd = (u32)PSC_AC97CDC_INDX(addr);
 268         cmd |= (u32)data;
 269         au_writel(cmd, PSC_AC97CDC);
 270         au_sync();
 271
 272         for (i = 0; i < POLL_COUNT; i++) {
 273                 val = au_readl(PSC_AC97STAT);
 274                 au_sync();
 275                 if (!(val & PSC_AC97STAT_CP))
 276                         break;
 277         }
 278         if (i == POLL_COUNT)
 279                 err("wrcodec: codec cmd pending expired!");
 280
 281         for (i = 0; i < POLL_COUNT; i++) {
 282                 val = au_readl(PSC_AC97EVNT);
 283                 au_sync();
 284                 if (val & PSC_AC97EVNT_CD)
 285                         break;
 286         }
 287         if (i == POLL_COUNT)
 288                 err("wrcodec: read cmdwait expired!");
 289
 290         /* Clear command done event.
 291         */
 292         au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
 293         au_sync();
 294
 295         spin_unlock_irqrestore(&s->lock, flags);
 296 }
 297
 298 static void
 299 waitcodec(struct ac97_codec *codec)
 300 {
 301         u16     temp;
 302         u32     val;
 303         int     i;
 304
 305         /* codec_wait is used to wait for a ready state after
 306          * an AC97C_RESET.
 307          */
 308         au1550_delay(10);
 309
 310         /* first poll the CODEC_READY tag bit
 311         */
 312         for (i = 0; i < POLL_COUNT; i++) {
 313                 val = au_readl(PSC_AC97STAT);
 314                 au_sync();
 315                 if (val & PSC_AC97STAT_CR)
 316                         break;
 317         }
 318         if (i == POLL_COUNT) {
 319                 err("waitcodec: CODEC_READY poll expired!");
 320                 return;
 321         }
 322
 323         /* get AC'97 powerdown control/status register
 324         */
 325         temp = rdcodec(codec, AC97_POWER_CONTROL);
 326
 327         /* If anything is powered down, power'em up
 328         */
 329         if (temp & 0x7f00) {
 330                 /* Power on
 331                 */
 332                 wrcodec(codec, AC97_POWER_CONTROL, 0);
 333                 au1550_delay(100);
 334
 335                 /* Reread
 336                 */
 337                 temp = rdcodec(codec, AC97_POWER_CONTROL);
 338         }
 339
 340         /* Check if Codec REF,ANL,DAC,ADC ready
 341         */
 342         if ((temp & 0x7f0f) != 0x000f)
 343                 err("codec reg 26 status (0x%x) not ready!!", temp);
 344 }
 345
 346 /* stop the ADC before calling */
 347 static void
 348 set_adc_rate(struct au1550_state *s, unsigned rate)
 349 {
 350         struct dmabuf  *adc = &s->dma_adc;
 351         struct dmabuf  *dac = &s->dma_dac;
 352         unsigned        adc_rate, dac_rate;
 353         u16             ac97_extstat;
 354
 355         if (s->no_vra) {
 356                 /* calc SRC factor
 357                 */
 358                 adc->src_factor = ((96000 / rate) + 1) >> 1;
 359                 adc->sample_rate = 48000 / adc->src_factor;
 360                 return;
 361         }
 362
 363         adc->src_factor = 1;
 364
 365         ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
 366
 367         rate = rate > 48000 ? 48000 : rate;
 368
 369         /* enable VRA
 370         */
 371         wrcodec(s->codec, AC97_EXTENDED_STATUS,
 372                 ac97_extstat | AC97_EXTSTAT_VRA);
 373
 374         /* now write the sample rate
 375         */
 376         wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
 377
 378         /* read it back for actual supported rate
 379         */
 380         adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
 381
 382         pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
 383
 384         /* some codec's don't allow unequal DAC and ADC rates, in which case
 385          * writing one rate reg actually changes both.
 386          */
 387         dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
 388         if (dac->num_channels > 2)
 389                 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
 390         if (dac->num_channels > 4)
 391                 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
 392
 393         adc->sample_rate = adc_rate;
 394         dac->sample_rate = dac_rate;
 395 }
 396
 397 /* stop the DAC before calling */
 398 static void
 399 set_dac_rate(struct au1550_state *s, unsigned rate)
 400 {
 401         struct dmabuf  *dac = &s->dma_dac;
 402         struct dmabuf  *adc = &s->dma_adc;
 403         unsigned        adc_rate, dac_rate;
 404         u16             ac97_extstat;
 405
 406         if (s->no_vra) {
 407                 /* calc SRC factor
 408                 */
 409                 dac->src_factor = ((96000 / rate) + 1) >> 1;
 410                 dac->sample_rate = 48000 / dac->src_factor;
 411                 return;
 412         }
 413
 414         dac->src_factor = 1;
 415
 416         ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
 417
 418         rate = rate > 48000 ? 48000 : rate;
 419
 420         /* enable VRA
 421         */
 422         wrcodec(s->codec, AC97_EXTENDED_STATUS,
 423                 ac97_extstat | AC97_EXTSTAT_VRA);
 424
 425         /* now write the sample rate
 426         */
 427         wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
 428
 429         /* I don't support different sample rates for multichannel,
 430          * so make these channels the same.
 431          */
 432         if (dac->num_channels > 2)
 433                 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
 434         if (dac->num_channels > 4)
 435                 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
 436         /* read it back for actual supported rate
 437         */
 438         dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
 439
 440         pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
 441
 442         /* some codec's don't allow unequal DAC and ADC rates, in which case
 443          * writing one rate reg actually changes both.
 444          */
 445         adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
 446
 447         dac->sample_rate = dac_rate;
 448         adc->sample_rate = adc_rate;
 449 }
 450
 451 static void
 452 stop_dac(struct au1550_state *s)
 453 {
 454         struct dmabuf  *db = &s->dma_dac;
 455         u32             stat;
 456         unsigned long   flags;
 457
 458         if (db->stopped)
 459                 return;
 460
 461         spin_lock_irqsave(&s->lock, flags);
 462
 463         au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
 464         au_sync();
 465
 466         /* Wait for Transmit Busy to show disabled.
 467         */
 468         do {
 469                 stat = au_readl(PSC_AC97STAT);
 470                 au_sync();
 471         } while ((stat & PSC_AC97STAT_TB) != 0);
 472
 473         au1xxx_dbdma_reset(db->dmanr);
 474
 475         db->stopped = 1;
 476
 477         spin_unlock_irqrestore(&s->lock, flags);
 478 }
 479
 480 static void
 481 stop_adc(struct au1550_state *s)
 482 {
 483         struct dmabuf  *db = &s->dma_adc;
 484         unsigned long   flags;
 485         u32             stat;
 486
 487         if (db->stopped)
 488                 return;
 489
 490         spin_lock_irqsave(&s->lock, flags);
 491
 492         au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
 493         au_sync();
 494
 495         /* Wait for Receive Busy to show disabled.
 496         */
 497         do {
 498                 stat = au_readl(PSC_AC97STAT);
 499                 au_sync();
 500         } while ((stat & PSC_AC97STAT_RB) != 0);
 501
 502         au1xxx_dbdma_reset(db->dmanr);
 503
 504         db->stopped = 1;
 505
 506         spin_unlock_irqrestore(&s->lock, flags);
 507 }
 508
 509
 510 static void
 511 set_xmit_slots(int num_channels)
 512 {
 513         u32     ac97_config, stat;
 514
 515         ac97_config = au_readl(PSC_AC97CFG);
 516         au_sync();
 517         ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
 518         au_writel(ac97_config, PSC_AC97CFG);
 519         au_sync();
 520
 521         switch (num_channels) {
 522         case 6:         /* stereo with surround and center/LFE,
 523                          * slots 3,4,6,7,8,9
 524                          */
 525                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
 526                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
 527
 528         case 4:         /* stereo with surround, slots 3,4,7,8 */
 529                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
 530                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
 531
 532         case 2:         /* stereo, slots 3,4 */
 533         case 1:         /* mono */
 534                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
 535                 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
 536         }
 537
 538         au_writel(ac97_config, PSC_AC97CFG);
 539         au_sync();
 540
 541         ac97_config |= PSC_AC97CFG_DE_ENABLE;
 542         au_writel(ac97_config, PSC_AC97CFG);
 543         au_sync();
 544
 545         /* Wait for Device ready.
 546         */
 547         do {
 548                 stat = au_readl(PSC_AC97STAT);
 549                 au_sync();
 550         } while ((stat & PSC_AC97STAT_DR) == 0);
 551 }
 552
 553 static void
 554 set_recv_slots(int num_channels)
 555 {
 556         u32     ac97_config, stat;
 557
 558         ac97_config = au_readl(PSC_AC97CFG);
 559         au_sync();
 560         ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
 561         au_writel(ac97_config, PSC_AC97CFG);
 562         au_sync();
 563
 564         /* Always enable slots 3 and 4 (stereo). Slot 6 is
 565          * optional Mic ADC, which we don't support yet.
 566          */
 567         ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
 568         ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
 569
 570         au_writel(ac97_config, PSC_AC97CFG);
 571         au_sync();
 572
 573         ac97_config |= PSC_AC97CFG_DE_ENABLE;
 574         au_writel(ac97_config, PSC_AC97CFG);
 575         au_sync();
 576
 577         /* Wait for Device ready.
 578         */
 579         do {
 580                 stat = au_readl(PSC_AC97STAT);
 581                 au_sync();
 582         } while ((stat & PSC_AC97STAT_DR) == 0);
 583 }
 584
 585 /* Hold spinlock for both start_dac() and start_adc() calls */
 586 static void
 587 start_dac(struct au1550_state *s)
 588 {
 589         struct dmabuf  *db = &s->dma_dac;
 590
 591         if (!db->stopped)
 592                 return;
 593
 594         set_xmit_slots(db->num_channels);
 595         au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
 596         au_sync();
 597         au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
 598         au_sync();
 599
 600         au1xxx_dbdma_start(db->dmanr);
 601
 602         db->stopped = 0;
 603 }
 604
 605 static void
 606 start_adc(struct au1550_state *s)
 607 {
 608         struct dmabuf  *db = &s->dma_adc;
 609         int     i;
 610
 611         if (!db->stopped)
 612                 return;
 613
 614         /* Put two buffers on the ring to get things started.
 615         */
 616         for (i=0; i<2; i++) {
 617                 au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
 618
 619                 db->nextIn += db->dma_fragsize;
 620                 if (db->nextIn >= db->rawbuf + db->dmasize)
 621                         db->nextIn -= db->dmasize;
 622         }
 623
 624         set_recv_slots(db->num_channels);
 625         au1xxx_dbdma_start(db->dmanr);
 626         au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
 627         au_sync();
 628         au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
 629         au_sync();
 630
 631         db->stopped = 0;
 632 }
 633
 634 static int
 635 prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
 636 {
 637         unsigned user_bytes_per_sec;
 638         unsigned        bufs;
 639         unsigned        rate = db->sample_rate;
 640
 641         if (!db->rawbuf) {
 642                 db->ready = db->mapped = 0;
 643                 db->buforder = 5;       /* 32 * PAGE_SIZE */
 644                 db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
 645                 if (!db->rawbuf)
 646                         return -ENOMEM;
 647         }
 648
 649         db->cnt_factor = 1;
 650         if (db->sample_size == 8)
 651                 db->cnt_factor *= 2;
 652         if (db->num_channels == 1)
 653                 db->cnt_factor *= 2;
 654         db->cnt_factor *= db->src_factor;
 655
 656         db->count = 0;
 657         db->dma_qcount = 0;
 658         db->nextIn = db->nextOut = db->rawbuf;
 659
 660         db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
 661         db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
 662                                         2 : db->num_channels);
 663
 664         user_bytes_per_sec = rate * db->user_bytes_per_sample;
 665         bufs = PAGE_SIZE << db->buforder;
 666         if (db->ossfragshift) {
 667                 if ((1000 << db->ossfragshift) < user_bytes_per_sec)
 668                         db->fragshift = ld2(user_bytes_per_sec/1000);
 669                 else
 670                         db->fragshift = db->ossfragshift;
 671         } else {
 672                 db->fragshift = ld2(user_bytes_per_sec / 100 /
 673                                     (db->subdivision ? db->subdivision : 1));
 674                 if (db->fragshift < 3)
 675                         db->fragshift = 3;
 676         }
 677
 678         db->fragsize = 1 << db->fragshift;
 679         db->dma_fragsize = db->fragsize * db->cnt_factor;
 680         db->numfrag = bufs / db->dma_fragsize;
 681
 682         while (db->numfrag < 4 && db->fragshift > 3) {
 683                 db->fragshift--;
 684                 db->fragsize = 1 << db->fragshift;
 685                 db->dma_fragsize = db->fragsize * db->cnt_factor;
 686                 db->numfrag = bufs / db->dma_fragsize;
 687         }
 688
 689         if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
 690                 db->numfrag = db->ossmaxfrags;
 691
 692         db->dmasize = db->dma_fragsize * db->numfrag;
 693         memset(db->rawbuf, 0, bufs);
 694
 695         pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
 696             rate, db->sample_size, db->num_channels);
 697         pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
 698             db->fragsize, db->cnt_factor, db->dma_fragsize);
 699         pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
 700
 701         db->ready = 1;
 702         return 0;
 703 }
 704
 705 static int
 706 prog_dmabuf_adc(struct au1550_state *s)
 707 {
 708         stop_adc(s);
 709         return prog_dmabuf(s, &s->dma_adc);
 710
 711 }
 712
 713 static int
 714 prog_dmabuf_dac(struct au1550_state *s)
 715 {
 716         stop_dac(s);
 717         return prog_dmabuf(s, &s->dma_dac);
 718 }
 719
 720
 721 static void dac_dma_interrupt(int irq, void *dev_id)
 722 {
 723         struct au1550_state *s = (struct au1550_state *) dev_id;
 724         struct dmabuf  *db = &s->dma_dac;
 725         u32     ac97c_stat;
 726
 727         spin_lock(&s->lock);
 728
 729         ac97c_stat = au_readl(PSC_AC97STAT);
 730         if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
 731                 pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
 732         db->dma_qcount--;
 733
 734         if (db->count >= db->fragsize) {
 735                 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
 736                                                         db->fragsize) == 0) {
 737                         err("qcount < 2 and no ring room!");
 738                 }
 739                 db->nextOut += db->fragsize;
 740                 if (db->nextOut >= db->rawbuf + db->dmasize)
 741                         db->nextOut -= db->dmasize;
 742                 db->count -= db->fragsize;
 743                 db->total_bytes += db->dma_fragsize;
 744                 db->dma_qcount++;
 745         }
 746
 747         /* wake up anybody listening */
 748         if (waitqueue_active(&db->wait))
 749                 wake_up(&db->wait);
 750
 751         spin_unlock(&s->lock);
 752 }
 753
 754
 755 static void adc_dma_interrupt(int irq, void *dev_id)
 756 {
 757         struct  au1550_state *s = (struct au1550_state *)dev_id;
 758         struct  dmabuf  *dp = &s->dma_adc;
 759         u32     obytes;
 760         char    *obuf;
 761
 762         spin_lock(&s->lock);
 763
 764         /* Pull the buffer from the dma queue.
 765         */
 766         au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
 767
 768         if ((dp->count + obytes) > dp->dmasize) {
 769                 /* Overrun. Stop ADC and log the error
 770                 */
 771                 spin_unlock(&s->lock);
 772                 stop_adc(s);
 773                 dp->error++;
 774                 err("adc overrun");
 775                 return;
 776         }
 777
 778         /* Put a new empty buffer on the destination DMA.
 779         */
 780         au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
 781
 782         dp->nextIn += dp->dma_fragsize;
 783         if (dp->nextIn >= dp->rawbuf + dp->dmasize)
 784                 dp->nextIn -= dp->dmasize;
 785
 786         dp->count += obytes;
 787         dp->total_bytes += obytes;
 788
 789         /* wake up anybody listening
 790         */
 791         if (waitqueue_active(&dp->wait))
 792                 wake_up(&dp->wait);
 793
 794         spin_unlock(&s->lock);
 795 }
 796
 797 static loff_t
 798 au1550_llseek(struct file *file, loff_t offset, int origin)
 799 {
 800         return -ESPIPE;
 801 }
 802
 803
 804 static int
 805 au1550_open_mixdev(struct inode *inode, struct file *file)
 806 {
 807         file->private_data = &au1550_state;
 808         return 0;
 809 }
 810
 811 static int
 812 au1550_release_mixdev(struct inode *inode, struct file *file)
 813 {
 814         return 0;
 815 }
 816
 817 static int
 818 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
 819                         unsigned long arg)
 820 {
 821         return codec->mixer_ioctl(codec, cmd, arg);
 822 }
 823
 824 static int
 825 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
 826                                unsigned int cmd, unsigned long arg)
 827 {
 828         struct au1550_state *s = (struct au1550_state *)file->private_data;
 829         struct ac97_codec *codec = s->codec;
 830
 831         return mixdev_ioctl(codec, cmd, arg);
 832 }
 833
 834 static /*const */ struct file_operations au1550_mixer_fops = {
 835         owner:THIS_MODULE,
 836         llseek:au1550_llseek,
 837         ioctl:au1550_ioctl_mixdev,
 838         open:au1550_open_mixdev,
 839         release:au1550_release_mixdev,
 840 };
 841
 842 static int
 843 drain_dac(struct au1550_state *s, int nonblock)
 844 {
 845         unsigned long   flags;
 846         int             count, tmo;
 847
 848         if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
 849                 return 0;
 850
 851         for (;;) {
 852                 spin_lock_irqsave(&s->lock, flags);
 853                 count = s->dma_dac.count;
 854                 spin_unlock_irqrestore(&s->lock, flags);
 855                 if (count <= s->dma_dac.fragsize)
 856                         break;
 857                 if (signal_pending(current))
 858                         break;
 859                 if (nonblock)
 860                         return -EBUSY;
 861                 tmo = 1000 * count / (s->no_vra ?
 862                                       48000 : s->dma_dac.sample_rate);
 863                 tmo /= s->dma_dac.dma_bytes_per_sample;
 864                 au1550_delay(tmo);
 865         }
 866         if (signal_pending(current))
 867                 return -ERESTARTSYS;
 868         return 0;
 869 }
 870
 871 static inline u8 S16_TO_U8(s16 ch)
 872 {
 873         return (u8) (ch >> 8) + 0x80;
 874 }
 875 static inline s16 U8_TO_S16(u8 ch)
 876 {
 877         return (s16) (ch - 0x80) << 8;
 878 }
 879
 880 /*
 881  * Translates user samples to dma buffer suitable for AC'97 DAC data:
 882  *     If mono, copy left channel to right channel in dma buffer.
 883  *     If 8 bit samples, cvt to 16-bit before writing to dma buffer.
 884  *     If interpolating (no VRA), duplicate every audio frame src_factor times.
 885  */
 886 static int
 887 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
 888                                                                int dmacount)
 889 {
 890         int             sample, i;
 891         int             interp_bytes_per_sample;
 892         int             num_samples;
 893         int             mono = (db->num_channels == 1);
 894         char            usersample[12];
 895         s16             ch, dmasample[6];
 896
 897         if (db->sample_size == 16 && !mono && db->src_factor == 1) {
 898                 /* no translation necessary, just copy
 899                 */
 900                 if (copy_from_user(dmabuf, userbuf, dmacount))
 901                         return -EFAULT;
 902                 return dmacount;
 903         }
 904
 905         interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
 906         num_samples = dmacount / interp_bytes_per_sample;
 907
 908         for (sample = 0; sample < num_samples; sample++) {
 909                 if (copy_from_user(usersample, userbuf,
 910                                    db->user_bytes_per_sample)) {
 911                         return -EFAULT;
 912                 }
 913
 914                 for (i = 0; i < db->num_channels; i++) {
 915                         if (db->sample_size == 8)
 916                                 ch = U8_TO_S16(usersample[i]);
 917                         else
 918                                 ch = *((s16 *) (&usersample[i * 2]));
 919                         dmasample[i] = ch;
 920                         if (mono)
 921                                 dmasample[i + 1] = ch;  /* right channel */
 922                 }
 923
 924                 /* duplicate every audio frame src_factor times
 925                 */
 926                 for (i = 0; i < db->src_factor; i++)
 927                         memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
 928
 929                 userbuf += db->user_bytes_per_sample;
 930                 dmabuf += interp_bytes_per_sample;
 931         }
 932
 933         return num_samples * interp_bytes_per_sample;
 934 }
 935
 936 /*
 937  * Translates AC'97 ADC samples to user buffer:
 938  *     If mono, send only left channel to user buffer.
 939  *     If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
 940  *     If decimating (no VRA), skip over src_factor audio frames.
 941  */
 942 static int
 943 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
 944                                                              int dmacount)
 945 {
 946         int             sample, i;
 947         int             interp_bytes_per_sample;
 948         int             num_samples;
 949         int             mono = (db->num_channels == 1);
 950         char            usersample[12];
 951
 952         if (db->sample_size == 16 && !mono && db->src_factor == 1) {
 953                 /* no translation necessary, just copy
 954                 */
 955                 if (copy_to_user(userbuf, dmabuf, dmacount))
 956                         return -EFAULT;
 957                 return dmacount;
 958         }
 959
 960         interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
 961         num_samples = dmacount / interp_bytes_per_sample;
 962
 963         for (sample = 0; sample < num_samples; sample++) {
 964                 for (i = 0; i < db->num_channels; i++) {
 965                         if (db->sample_size == 8)
 966                                 usersample[i] =
 967                                         S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
 968                         else
 969                                 *((s16 *) (&usersample[i * 2])) =
 970                                         *((s16 *) (&dmabuf[i * 2]));
 971                 }
 972
 973                 if (copy_to_user(userbuf, usersample,
 974                                  db->user_bytes_per_sample)) {
 975                         return -EFAULT;
 976                 }
 977
 978                 userbuf += db->user_bytes_per_sample;
 979                 dmabuf += interp_bytes_per_sample;
 980         }
 981
 982         return num_samples * interp_bytes_per_sample;
 983 }
 984
 985 /*
 986  * Copy audio data to/from user buffer from/to dma buffer, taking care
 987  * that we wrap when reading/writing the dma buffer. Returns actual byte
 988  * count written to or read from the dma buffer.
 989  */
 990 static int
 991 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
 992 {
 993         char           *bufptr = to_user ? db->nextOut : db->nextIn;
 994         char           *bufend = db->rawbuf + db->dmasize;
 995         int             cnt, ret;
 996
 997         if (bufptr + count > bufend) {
 998                 int             partial = (int) (bufend - bufptr);
 999                 if (to_user) {
1000                         if ((cnt = translate_to_user(db, userbuf,
1001                                                      bufptr, partial)) < 0)
1002                                 return cnt;
1003                         ret = cnt;
1004                         if ((cnt = translate_to_user(db, userbuf + partial,
1005                                                      db->rawbuf,
1006                                                      count - partial)) < 0)
1007                                 return cnt;
1008                         ret += cnt;
1009                 } else {
1010                         if ((cnt = translate_from_user(db, bufptr, userbuf,
1011                                                        partial)) < 0)
1012                                 return cnt;
1013                         ret = cnt;
1014                         if ((cnt = translate_from_user(db, db->rawbuf,
1015                                                        userbuf + partial,
1016                                                        count - partial)) < 0)
1017                                 return cnt;
1018                         ret += cnt;
1019                 }
1020         } else {
1021                 if (to_user)
1022                         ret = translate_to_user(db, userbuf, bufptr, count);
1023                 else
1024                         ret = translate_from_user(db, bufptr, userbuf, count);
1025         }
1026
1027         return ret;
1028 }
1029
1030
1031 static ssize_t
1032 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1033 {
1034         struct au1550_state *s = (struct au1550_state *)file->private_data;
1035         struct dmabuf  *db = &s->dma_adc;
1036         DECLARE_WAITQUEUE(wait, current);
1037         ssize_t         ret;
1038         unsigned long   flags;
1039         int             cnt, usercnt, avail;
1040
1041         if (db->mapped)
1042                 return -ENXIO;
1043         if (!access_ok(VERIFY_WRITE, buffer, count))
1044                 return -EFAULT;
1045         ret = 0;
1046
1047         count *= db->cnt_factor;
1048
1049         mutex_lock(&s->sem);
1050         add_wait_queue(&db->wait, &wait);
1051
1052         while (count > 0) {
1053                 /* wait for samples in ADC dma buffer
1054                 */
1055                 do {
1056                         spin_lock_irqsave(&s->lock, flags);
1057                         if (db->stopped)
1058                                 start_adc(s);
1059                         avail = db->count;
1060                         if (avail <= 0)
1061                                 __set_current_state(TASK_INTERRUPTIBLE);
1062                         spin_unlock_irqrestore(&s->lock, flags);
1063                         if (avail <= 0) {
1064                                 if (file->f_flags & O_NONBLOCK) {
1065                                         if (!ret)
1066                                                 ret = -EAGAIN;
1067                                         goto out;
1068                                 }
1069                                 mutex_unlock(&s->sem);
1070                                 schedule();
1071                                 if (signal_pending(current)) {
1072                                         if (!ret)
1073                                                 ret = -ERESTARTSYS;
1074                                         goto out2;
1075                                 }
1076                                 mutex_lock(&s->sem);
1077                         }
1078                 } while (avail <= 0);
1079
1080                 /* copy from nextOut to user
1081                 */
1082                 if ((cnt = copy_dmabuf_user(db, buffer,
1083                                             count > avail ?
1084                                             avail : count, 1)) < 0) {
1085                         if (!ret)
1086                                 ret = -EFAULT;
1087                         goto out;
1088                 }
1089
1090                 spin_lock_irqsave(&s->lock, flags);
1091                 db->count -= cnt;
1092                 db->nextOut += cnt;
1093                 if (db->nextOut >= db->rawbuf + db->dmasize)
1094                         db->nextOut -= db->dmasize;
1095                 spin_unlock_irqrestore(&s->lock, flags);
1096
1097                 count -= cnt;
1098                 usercnt = cnt / db->cnt_factor;
1099                 buffer += usercnt;
1100                 ret += usercnt;
1101         }                       /* while (count > 0) */
1102
1103 out:
1104         mutex_unlock(&s->sem);
1105 out2:
1106         remove_wait_queue(&db->wait, &wait);
1107         set_current_state(TASK_RUNNING);
1108         return ret;
1109 }
1110
1111 static ssize_t
1112 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1113 {
1114         struct au1550_state *s = (struct au1550_state *)file->private_data;
1115         struct dmabuf  *db = &s->dma_dac;
1116         DECLARE_WAITQUEUE(wait, current);
1117         ssize_t         ret = 0;
1118         unsigned long   flags;
1119         int             cnt, usercnt, avail;
1120
1121         pr_debug("write: count=%d\n", count);
1122
1123         if (db->mapped)
1124                 return -ENXIO;
1125         if (!access_ok(VERIFY_READ, buffer, count))
1126                 return -EFAULT;
1127
1128         count *= db->cnt_factor;
1129
1130         mutex_lock(&s->sem);
1131         add_wait_queue(&db->wait, &wait);
1132
1133         while (count > 0) {
1134                 /* wait for space in playback buffer
1135                 */
1136                 do {
1137                         spin_lock_irqsave(&s->lock, flags);
1138                         avail = (int) db->dmasize - db->count;
1139                         if (avail <= 0)
1140                                 __set_current_state(TASK_INTERRUPTIBLE);
1141                         spin_unlock_irqrestore(&s->lock, flags);
1142                         if (avail <= 0) {
1143                                 if (file->f_flags & O_NONBLOCK) {
1144                                         if (!ret)
1145                                                 ret = -EAGAIN;
1146                                         goto out;
1147                                 }
1148                                 mutex_unlock(&s->sem);
1149                                 schedule();
1150                                 if (signal_pending(current)) {
1151                                         if (!ret)
1152                                                 ret = -ERESTARTSYS;
1153                                         goto out2;
1154                                 }
1155                                 mutex_lock(&s->sem);
1156                         }
1157                 } while (avail <= 0);
1158
1159                 /* copy from user to nextIn
1160                 */
1161                 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1162                                             count > avail ?
1163                                             avail : count, 0)) < 0) {
1164                         if (!ret)
1165                                 ret = -EFAULT;
1166                         goto out;
1167                 }
1168
1169                 spin_lock_irqsave(&s->lock, flags);
1170                 db->count += cnt;
1171                 db->nextIn += cnt;
1172                 if (db->nextIn >= db->rawbuf + db->dmasize)
1173                         db->nextIn -= db->dmasize;
1174
1175                 /* If the data is available, we want to keep two buffers
1176                  * on the dma queue.  If the queue count reaches zero,
1177                  * we know the dma has stopped.
1178                  */
1179                 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1180                         if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1181                                                         db->fragsize) == 0) {
1182                                 err("qcount < 2 and no ring room!");
1183                         }
1184                         db->nextOut += db->fragsize;
1185                         if (db->nextOut >= db->rawbuf + db->dmasize)
1186                                 db->nextOut -= db->dmasize;
1187                         db->total_bytes += db->dma_fragsize;
1188                         if (db->dma_qcount == 0)
1189                                 start_dac(s);
1190                         db->dma_qcount++;
1191                 }
1192                 spin_unlock_irqrestore(&s->lock, flags);
1193
1194                 count -= cnt;
1195                 usercnt = cnt / db->cnt_factor;
1196                 buffer += usercnt;
1197                 ret += usercnt;
1198         }                       /* while (count > 0) */
1199
1200 out:
1201         mutex_unlock(&s->sem);
1202 out2:
1203         remove_wait_queue(&db->wait, &wait);
1204         set_current_state(TASK_RUNNING);
1205         return ret;
1206 }
1207
1208
1209 /* No kernel lock - we have our own spinlock */
1210 static unsigned int
1211 au1550_poll(struct file *file, struct poll_table_struct *wait)
1212 {
1213         struct au1550_state *s = (struct au1550_state *)file->private_data;
1214         unsigned long   flags;
1215         unsigned int    mask = 0;
1216
1217         if (file->f_mode & FMODE_WRITE) {
1218                 if (!s->dma_dac.ready)
1219                         return 0;
1220                 poll_wait(file, &s->dma_dac.wait, wait);
1221         }
1222         if (file->f_mode & FMODE_READ) {
1223                 if (!s->dma_adc.ready)
1224                         return 0;
1225                 poll_wait(file, &s->dma_adc.wait, wait);
1226         }
1227
1228         spin_lock_irqsave(&s->lock, flags);
1229
1230         if (file->f_mode & FMODE_READ) {
1231                 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1232                         mask |= POLLIN | POLLRDNORM;
1233         }
1234         if (file->f_mode & FMODE_WRITE) {
1235                 if (s->dma_dac.mapped) {
1236                         if (s->dma_dac.count >=
1237                             (signed)s->dma_dac.dma_fragsize)
1238                                 mask |= POLLOUT | POLLWRNORM;
1239                 } else {
1240                         if ((signed) s->dma_dac.dmasize >=
1241                             s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1242                                 mask |= POLLOUT | POLLWRNORM;
1243                 }
1244         }
1245         spin_unlock_irqrestore(&s->lock, flags);
1246         return mask;
1247 }
1248
1249 static int
1250 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1251 {
1252         struct au1550_state *s = (struct au1550_state *)file->private_data;
1253         struct dmabuf  *db;
1254         unsigned long   size;
1255         int ret = 0;
1256
1257         lock_kernel();
1258         mutex_lock(&s->sem);
1259         if (vma->vm_flags & VM_WRITE)
1260                 db = &s->dma_dac;
1261         else if (vma->vm_flags & VM_READ)
1262                 db = &s->dma_adc;
1263         else {
1264                 ret = -EINVAL;
1265                 goto out;
1266         }
1267         if (vma->vm_pgoff != 0) {
1268                 ret = -EINVAL;
1269                 goto out;
1270         }
1271         size = vma->vm_end - vma->vm_start;
1272         if (size > (PAGE_SIZE << db->buforder)) {
1273                 ret = -EINVAL;
1274                 goto out;
1275         }
1276         if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1277                              size, vma->vm_page_prot)) {
1278                 ret = -EAGAIN;
1279                 goto out;
1280         }
1281         vma->vm_flags &= ~VM_IO;
1282         db->mapped = 1;
1283 out:
1284         mutex_unlock(&s->sem);
1285         unlock_kernel();
1286         return ret;
1287 }
1288
1289 #ifdef DEBUG
1290 static struct ioctl_str_t {
1291         unsigned int    cmd;
1292         const char     *str;
1293 } ioctl_str[] = {
1294         {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1295         {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1296         {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1297         {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1298         {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1299         {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1300         {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1301         {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1302         {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1303         {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1304         {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1305         {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1306         {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1307         {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1308         {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1309         {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1310         {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1311         {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1312         {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1313         {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1314         {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1315         {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1316         {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1317         {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1318         {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1319         {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1320         {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1321         {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1322         {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1323         {OSS_GETVERSION, "OSS_GETVERSION"},
1324         {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1325         {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1326         {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1327         {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1328 };
1329 #endif
1330
1331 static int
1332 dma_count_done(struct dmabuf *db)
1333 {
1334         if (db->stopped)
1335                 return 0;
1336
1337         return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1338 }
1339
1340
1341 static int
1342 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1343                                                         unsigned long arg)
1344 {
1345         struct au1550_state *s = (struct au1550_state *)file->private_data;
1346         unsigned long   flags;
1347         audio_buf_info  abinfo;
1348         count_info      cinfo;
1349         int             count;
1350         int             val, mapped, ret, diff;
1351
1352         mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1353                 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1354
1355 #ifdef DEBUG
1356         for (count = 0; count < ARRAY_SIZE(ioctl_str); count++) {
1357                 if (ioctl_str[count].cmd == cmd)
1358                         break;
1359         }
1360         if (count < ARRAY_SIZE(ioctl_str))
1361                 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1362         else
1363                 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1364 #endif
1365
1366         switch (cmd) {
1367         case OSS_GETVERSION:
1368                 return put_user(SOUND_VERSION, (int *) arg);
1369
1370         case SNDCTL_DSP_SYNC:
1371                 if (file->f_mode & FMODE_WRITE)
1372                         return drain_dac(s, file->f_flags & O_NONBLOCK);
1373                 return 0;
1374
1375         case SNDCTL_DSP_SETDUPLEX:
1376                 return 0;
1377
1378         case SNDCTL_DSP_GETCAPS:
1379                 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1380                                 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1381
1382         case SNDCTL_DSP_RESET:
1383                 if (file->f_mode & FMODE_WRITE) {
1384                         stop_dac(s);
1385                         synchronize_irq();
1386                         s->dma_dac.count = s->dma_dac.total_bytes = 0;
1387                         s->dma_dac.nextIn = s->dma_dac.nextOut =
1388                                 s->dma_dac.rawbuf;
1389                 }
1390                 if (file->f_mode & FMODE_READ) {
1391                         stop_adc(s);
1392                         synchronize_irq();
1393                         s->dma_adc.count = s->dma_adc.total_bytes = 0;
1394                         s->dma_adc.nextIn = s->dma_adc.nextOut =
1395                                 s->dma_adc.rawbuf;
1396                 }
1397                 return 0;
1398
1399         case SNDCTL_DSP_SPEED:
1400                 if (get_user(val, (int *) arg))
1401                         return -EFAULT;
1402                 if (val >= 0) {
1403                         if (file->f_mode & FMODE_READ) {
1404                                 stop_adc(s);
1405                                 set_adc_rate(s, val);
1406                         }
1407                         if (file->f_mode & FMODE_WRITE) {
1408                                 stop_dac(s);
1409                                 set_dac_rate(s, val);
1410                         }
1411                         if (s->open_mode & FMODE_READ)
1412                                 if ((ret = prog_dmabuf_adc(s)))
1413                                         return ret;
1414                         if (s->open_mode & FMODE_WRITE)
1415                                 if ((ret = prog_dmabuf_dac(s)))
1416                                         return ret;
1417                 }
1418                 return put_user((file->f_mode & FMODE_READ) ?
1419                                 s->dma_adc.sample_rate :
1420                                 s->dma_dac.sample_rate,
1421                                 (int *)arg);
1422
1423         case SNDCTL_DSP_STEREO:
1424                 if (get_user(val, (int *) arg))
1425                         return -EFAULT;
1426                 if (file->f_mode & FMODE_READ) {
1427                         stop_adc(s);
1428                         s->dma_adc.num_channels = val ? 2 : 1;
1429                         if ((ret = prog_dmabuf_adc(s)))
1430                                 return ret;
1431                 }
1432                 if (file->f_mode & FMODE_WRITE) {
1433                         stop_dac(s);
1434                         s->dma_dac.num_channels = val ? 2 : 1;
1435                         if (s->codec_ext_caps & AC97_EXT_DACS) {
1436                                 /* disable surround and center/lfe in AC'97
1437                                 */
1438                                 u16 ext_stat = rdcodec(s->codec,
1439                                                        AC97_EXTENDED_STATUS);
1440                                 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1441                                         ext_stat | (AC97_EXTSTAT_PRI |
1442                                                     AC97_EXTSTAT_PRJ |
1443                                                     AC97_EXTSTAT_PRK));
1444                         }
1445                         if ((ret = prog_dmabuf_dac(s)))
1446                                 return ret;
1447                 }
1448                 return 0;
1449
1450         case SNDCTL_DSP_CHANNELS:
1451                 if (get_user(val, (int *) arg))
1452                         return -EFAULT;
1453                 if (val != 0) {
1454                         if (file->f_mode & FMODE_READ) {
1455                                 if (val < 0 || val > 2)
1456                                         return -EINVAL;
1457                                 stop_adc(s);
1458                                 s->dma_adc.num_channels = val;
1459                                 if ((ret = prog_dmabuf_adc(s)))
1460                                         return ret;
1461                         }
1462                         if (file->f_mode & FMODE_WRITE) {
1463                                 switch (val) {
1464                                 case 1:
1465                                 case 2:
1466                                         break;
1467                                 case 3:
1468                                 case 5:
1469                                         return -EINVAL;
1470                                 case 4:
1471                                         if (!(s->codec_ext_caps &
1472                                               AC97_EXTID_SDAC))
1473                                                 return -EINVAL;
1474                                         break;
1475                                 case 6:
1476                                         if ((s->codec_ext_caps &
1477                                              AC97_EXT_DACS) != AC97_EXT_DACS)
1478                                                 return -EINVAL;
1479                                         break;
1480                                 default:
1481                                         return -EINVAL;
1482                                 }
1483
1484                                 stop_dac(s);
1485                                 if (val <= 2 &&
1486                                     (s->codec_ext_caps & AC97_EXT_DACS)) {
1487                                         /* disable surround and center/lfe
1488                                          * channels in AC'97
1489                                          */
1490                                         u16             ext_stat =
1491                                                 rdcodec(s->codec,
1492                                                         AC97_EXTENDED_STATUS);
1493                                         wrcodec(s->codec,
1494                                                 AC97_EXTENDED_STATUS,
1495                                                 ext_stat | (AC97_EXTSTAT_PRI |
1496                                                             AC97_EXTSTAT_PRJ |
1497                                                             AC97_EXTSTAT_PRK));
1498                                 } else if (val >= 4) {
1499                                         /* enable surround, center/lfe
1500                                          * channels in AC'97
1501                                          */
1502                                         u16             ext_stat =
1503                                                 rdcodec(s->codec,
1504                                                         AC97_EXTENDED_STATUS);
1505                                         ext_stat &= ~AC97_EXTSTAT_PRJ;
1506                                         if (val == 6)
1507                                                 ext_stat &=
1508                                                         ~(AC97_EXTSTAT_PRI |
1509                                                           AC97_EXTSTAT_PRK);
1510                                         wrcodec(s->codec,
1511                                                 AC97_EXTENDED_STATUS,
1512                                                 ext_stat);
1513                                 }
1514
1515                                 s->dma_dac.num_channels = val;
1516                                 if ((ret = prog_dmabuf_dac(s)))
1517                                         return ret;
1518                         }
1519                 }
1520                 return put_user(val, (int *) arg);
1521
1522         case SNDCTL_DSP_GETFMTS:        /* Returns a mask */
1523                 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1524
1525         case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1526                 if (get_user(val, (int *) arg))
1527                         return -EFAULT;
1528                 if (val != AFMT_QUERY) {
1529                         if (file->f_mode & FMODE_READ) {
1530                                 stop_adc(s);
1531                                 if (val == AFMT_S16_LE)
1532                                         s->dma_adc.sample_size = 16;
1533                                 else {
1534                                         val = AFMT_U8;
1535                                         s->dma_adc.sample_size = 8;
1536                                 }
1537                                 if ((ret = prog_dmabuf_adc(s)))
1538                                         return ret;
1539                         }
1540                         if (file->f_mode & FMODE_WRITE) {
1541                                 stop_dac(s);
1542                                 if (val == AFMT_S16_LE)
1543                                         s->dma_dac.sample_size = 16;
1544                                 else {
1545                                         val = AFMT_U8;
1546                                         s->dma_dac.sample_size = 8;
1547                                 }
1548                                 if ((ret = prog_dmabuf_dac(s)))
1549                                         return ret;
1550                         }
1551                 } else {
1552                         if (file->f_mode & FMODE_READ)
1553                                 val = (s->dma_adc.sample_size == 16) ?
1554                                         AFMT_S16_LE : AFMT_U8;
1555                         else
1556                                 val = (s->dma_dac.sample_size == 16) ?
1557                                         AFMT_S16_LE : AFMT_U8;
1558                 }
1559                 return put_user(val, (int *) arg);
1560
1561         case SNDCTL_DSP_POST:
1562                 return 0;
1563
1564         case SNDCTL_DSP_GETTRIGGER:
1565                 val = 0;
1566                 spin_lock_irqsave(&s->lock, flags);
1567                 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1568                         val |= PCM_ENABLE_INPUT;
1569                 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1570                         val |= PCM_ENABLE_OUTPUT;
1571                 spin_unlock_irqrestore(&s->lock, flags);
1572                 return put_user(val, (int *) arg);
1573
1574         case SNDCTL_DSP_SETTRIGGER:
1575                 if (get_user(val, (int *) arg))
1576                         return -EFAULT;
1577                 if (file->f_mode & FMODE_READ) {
1578                         if (val & PCM_ENABLE_INPUT) {
1579                                 spin_lock_irqsave(&s->lock, flags);
1580                                 start_adc(s);
1581                                 spin_unlock_irqrestore(&s->lock, flags);
1582                         } else
1583                                 stop_adc(s);
1584                 }
1585                 if (file->f_mode & FMODE_WRITE) {
1586                         if (val & PCM_ENABLE_OUTPUT) {
1587                                 spin_lock_irqsave(&s->lock, flags);
1588                                 start_dac(s);
1589                                 spin_unlock_irqrestore(&s->lock, flags);
1590                         } else
1591                                 stop_dac(s);
1592                 }
1593                 return 0;
1594
1595         case SNDCTL_DSP_GETOSPACE:
1596                 if (!(file->f_mode & FMODE_WRITE))
1597                         return -EINVAL;
1598                 abinfo.fragsize = s->dma_dac.fragsize;
1599                 spin_lock_irqsave(&s->lock, flags);
1600                 count = s->dma_dac.count;
1601                 count -= dma_count_done(&s->dma_dac);
1602                 spin_unlock_irqrestore(&s->lock, flags);
1603                 if (count < 0)
1604                         count = 0;
1605                 abinfo.bytes = (s->dma_dac.dmasize - count) /
1606                         s->dma_dac.cnt_factor;
1607                 abinfo.fragstotal = s->dma_dac.numfrag;
1608                 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1609                 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1610                 return copy_to_user((void *) arg, &abinfo,
1611                                     sizeof(abinfo)) ? -EFAULT : 0;
1612
1613         case SNDCTL_DSP_GETISPACE:
1614                 if (!(file->f_mode & FMODE_READ))
1615                         return -EINVAL;
1616                 abinfo.fragsize = s->dma_adc.fragsize;
1617                 spin_lock_irqsave(&s->lock, flags);
1618                 count = s->dma_adc.count;
1619                 count += dma_count_done(&s->dma_adc);
1620                 spin_unlock_irqrestore(&s->lock, flags);
1621                 if (count < 0)
1622                         count = 0;
1623                 abinfo.bytes = count / s->dma_adc.cnt_factor;
1624                 abinfo.fragstotal = s->dma_adc.numfrag;
1625                 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1626                 return copy_to_user((void *) arg, &abinfo,
1627                                     sizeof(abinfo)) ? -EFAULT : 0;
1628
1629         case SNDCTL_DSP_NONBLOCK:
1630                 spin_lock(&file->f_lock);
1631                 file->f_flags |= O_NONBLOCK;
1632                 spin_unlock(&file->f_lock);
1633                 return 0;
1634
1635         case SNDCTL_DSP_GETODELAY:
1636                 if (!(file->f_mode & FMODE_WRITE))
1637                         return -EINVAL;
1638                 spin_lock_irqsave(&s->lock, flags);
1639                 count = s->dma_dac.count;
1640                 count -= dma_count_done(&s->dma_dac);
1641                 spin_unlock_irqrestore(&s->lock, flags);
1642                 if (count < 0)
1643                         count = 0;
1644                 count /= s->dma_dac.cnt_factor;
1645                 return put_user(count, (int *) arg);
1646
1647         case SNDCTL_DSP_GETIPTR:
1648                 if (!(file->f_mode & FMODE_READ))
1649                         return -EINVAL;
1650                 spin_lock_irqsave(&s->lock, flags);
1651                 cinfo.bytes = s->dma_adc.total_bytes;
1652                 count = s->dma_adc.count;
1653                 if (!s->dma_adc.stopped) {
1654                         diff = dma_count_done(&s->dma_adc);
1655                         count += diff;
1656                         cinfo.bytes += diff;
1657                         cinfo.ptr =  virt_to_phys(s->dma_adc.nextIn) + diff -
1658                                 virt_to_phys(s->dma_adc.rawbuf);
1659                 } else
1660                         cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1661                                 virt_to_phys(s->dma_adc.rawbuf);
1662                 if (s->dma_adc.mapped)
1663                         s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1664                 spin_unlock_irqrestore(&s->lock, flags);
1665                 if (count < 0)
1666                         count = 0;
1667                 cinfo.blocks = count >> s->dma_adc.fragshift;
1668                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1669
1670         case SNDCTL_DSP_GETOPTR:
1671                 if (!(file->f_mode & FMODE_READ))
1672                         return -EINVAL;
1673                 spin_lock_irqsave(&s->lock, flags);
1674                 cinfo.bytes = s->dma_dac.total_bytes;
1675                 count = s->dma_dac.count;
1676                 if (!s->dma_dac.stopped) {
1677                         diff = dma_count_done(&s->dma_dac);
1678                         count -= diff;
1679                         cinfo.bytes += diff;
1680                         cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1681                                 virt_to_phys(s->dma_dac.rawbuf);
1682                 } else
1683                         cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1684                                 virt_to_phys(s->dma_dac.rawbuf);
1685                 if (s->dma_dac.mapped)
1686                         s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1687                 spin_unlock_irqrestore(&s->lock, flags);
1688                 if (count < 0)
1689                         count = 0;
1690                 cinfo.blocks = count >> s->dma_dac.fragshift;
1691                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1692
1693         case SNDCTL_DSP_GETBLKSIZE:
1694                 if (file->f_mode & FMODE_WRITE)
1695                         return put_user(s->dma_dac.fragsize, (int *) arg);
1696                 else
1697                         return put_user(s->dma_adc.fragsize, (int *) arg);
1698
1699         case SNDCTL_DSP_SETFRAGMENT:
1700                 if (get_user(val, (int *) arg))
1701                         return -EFAULT;
1702                 if (file->f_mode & FMODE_READ) {
1703                         stop_adc(s);
1704                         s->dma_adc.ossfragshift = val & 0xffff;
1705                         s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1706                         if (s->dma_adc.ossfragshift < 4)
1707                                 s->dma_adc.ossfragshift = 4;
1708                         if (s->dma_adc.ossfragshift > 15)
1709                                 s->dma_adc.ossfragshift = 15;
1710                         if (s->dma_adc.ossmaxfrags < 4)
1711                                 s->dma_adc.ossmaxfrags = 4;
1712                         if ((ret = prog_dmabuf_adc(s)))
1713                                 return ret;
1714                 }
1715                 if (file->f_mode & FMODE_WRITE) {
1716                         stop_dac(s);
1717                         s->dma_dac.ossfragshift = val & 0xffff;
1718                         s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1719                         if (s->dma_dac.ossfragshift < 4)
1720                                 s->dma_dac.ossfragshift = 4;
1721                         if (s->dma_dac.ossfragshift > 15)
1722                                 s->dma_dac.ossfragshift = 15;
1723                         if (s->dma_dac.ossmaxfrags < 4)
1724                                 s->dma_dac.ossmaxfrags = 4;
1725                         if ((ret = prog_dmabuf_dac(s)))
1726                                 return ret;
1727                 }
1728                 return 0;
1729
1730         case SNDCTL_DSP_SUBDIVIDE:
1731                 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1732                     (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1733                         return -EINVAL;
1734                 if (get_user(val, (int *) arg))
1735                         return -EFAULT;
1736                 if (val != 1 && val != 2 && val != 4)
1737                         return -EINVAL;
1738                 if (file->f_mode & FMODE_READ) {
1739                         stop_adc(s);
1740                         s->dma_adc.subdivision = val;
1741                         if ((ret = prog_dmabuf_adc(s)))
1742                                 return ret;
1743                 }
1744                 if (file->f_mode & FMODE_WRITE) {
1745                         stop_dac(s);
1746                         s->dma_dac.subdivision = val;
1747                         if ((ret = prog_dmabuf_dac(s)))
1748                                 return ret;
1749                 }
1750                 return 0;
1751
1752         case SOUND_PCM_READ_RATE:
1753                 return put_user((file->f_mode & FMODE_READ) ?
1754                                 s->dma_adc.sample_rate :
1755                                 s->dma_dac.sample_rate,
1756                                 (int *)arg);
1757
1758         case SOUND_PCM_READ_CHANNELS:
1759                 if (file->f_mode & FMODE_READ)
1760                         return put_user(s->dma_adc.num_channels, (int *)arg);
1761                 else
1762                         return put_user(s->dma_dac.num_channels, (int *)arg);
1763
1764         case SOUND_PCM_READ_BITS:
1765                 if (file->f_mode & FMODE_READ)
1766                         return put_user(s->dma_adc.sample_size, (int *)arg);
1767                 else
1768                         return put_user(s->dma_dac.sample_size, (int *)arg);
1769
1770         case SOUND_PCM_WRITE_FILTER:
1771         case SNDCTL_DSP_SETSYNCRO:
1772         case SOUND_PCM_READ_FILTER:
1773                 return -EINVAL;
1774         }
1775
1776         return mixdev_ioctl(s->codec, cmd, arg);
1777 }
1778
1779
1780 static int
1781 au1550_open(struct inode *inode, struct file *file)
1782 {
1783         int             minor = MINOR(inode->i_rdev);
1784         DECLARE_WAITQUEUE(wait, current);
1785         struct au1550_state *s = &au1550_state;
1786         int             ret;
1787
1788 #ifdef DEBUG
1789         if (file->f_flags & O_NONBLOCK)
1790                 pr_debug("open: non-blocking\n");
1791         else
1792                 pr_debug("open: blocking\n");
1793 #endif
1794
1795         file->private_data = s;
1796         /* wait for device to become free */
1797         mutex_lock(&s->open_mutex);
1798         while (s->open_mode & file->f_mode) {
1799                 if (file->f_flags & O_NONBLOCK) {
1800                         mutex_unlock(&s->open_mutex);
1801                         return -EBUSY;
1802                 }
1803                 add_wait_queue(&s->open_wait, &wait);
1804                 __set_current_state(TASK_INTERRUPTIBLE);
1805                 mutex_unlock(&s->open_mutex);
1806                 schedule();
1807                 remove_wait_queue(&s->open_wait, &wait);
1808                 set_current_state(TASK_RUNNING);
1809                 if (signal_pending(current))
1810                         return -ERESTARTSYS;
1811                 mutex_lock(&s->open_mutex);
1812         }
1813
1814         stop_dac(s);
1815         stop_adc(s);
1816
1817         if (file->f_mode & FMODE_READ) {
1818                 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1819                         s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1820                 s->dma_adc.num_channels = 1;
1821                 s->dma_adc.sample_size = 8;
1822                 set_adc_rate(s, 8000);
1823                 if ((minor & 0xf) == SND_DEV_DSP16)
1824                         s->dma_adc.sample_size = 16;
1825         }
1826
1827         if (file->f_mode & FMODE_WRITE) {
1828                 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1829                         s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1830                 s->dma_dac.num_channels = 1;
1831                 s->dma_dac.sample_size = 8;
1832                 set_dac_rate(s, 8000);
1833                 if ((minor & 0xf) == SND_DEV_DSP16)
1834                         s->dma_dac.sample_size = 16;
1835         }
1836
1837         if (file->f_mode & FMODE_READ) {
1838                 if ((ret = prog_dmabuf_adc(s)))
1839                         return ret;
1840         }
1841         if (file->f_mode & FMODE_WRITE) {
1842                 if ((ret = prog_dmabuf_dac(s)))
1843                         return ret;
1844         }
1845
1846         s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1847         mutex_unlock(&s->open_mutex);
1848         mutex_init(&s->sem);
1849         return 0;
1850 }
1851
1852 static int
1853 au1550_release(struct inode *inode, struct file *file)
1854 {
1855         struct au1550_state *s = (struct au1550_state *)file->private_data;
1856
1857         lock_kernel();
1858
1859         if (file->f_mode & FMODE_WRITE) {
1860                 unlock_kernel();
1861                 drain_dac(s, file->f_flags & O_NONBLOCK);
1862                 lock_kernel();
1863         }
1864
1865         mutex_lock(&s->open_mutex);
1866         if (file->f_mode & FMODE_WRITE) {
1867                 stop_dac(s);
1868                 kfree(s->dma_dac.rawbuf);
1869                 s->dma_dac.rawbuf = NULL;
1870         }
1871         if (file->f_mode & FMODE_READ) {
1872                 stop_adc(s);
1873                 kfree(s->dma_adc.rawbuf);
1874                 s->dma_adc.rawbuf = NULL;
1875         }
1876         s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1877         mutex_unlock(&s->open_mutex);
1878         wake_up(&s->open_wait);
1879         unlock_kernel();
1880         return 0;
1881 }
1882
1883 static /*const */ struct file_operations au1550_audio_fops = {
1884         owner:          THIS_MODULE,
1885         llseek:         au1550_llseek,
1886         read:           au1550_read,
1887         write:          au1550_write,
1888         poll:           au1550_poll,
1889         ioctl:          au1550_ioctl,
1890         mmap:           au1550_mmap,
1891         open:           au1550_open,
1892         release:        au1550_release,
1893 };
1894
1895 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1896 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1897 MODULE_LICENSE("GPL");
1898
1899
1900 static int __devinit
1901 au1550_probe(void)
1902 {
1903         struct au1550_state *s = &au1550_state;
1904         int             val;
1905
1906         memset(s, 0, sizeof(struct au1550_state));
1907
1908         init_waitqueue_head(&s->dma_adc.wait);
1909         init_waitqueue_head(&s->dma_dac.wait);
1910         init_waitqueue_head(&s->open_wait);
1911         mutex_init(&s->open_mutex);
1912         spin_lock_init(&s->lock);
1913
1914         s->codec = ac97_alloc_codec();
1915         if(s->codec == NULL) {
1916                 err("Out of memory");
1917                 return -1;
1918         }
1919         s->codec->private_data = s;
1920         s->codec->id = 0;
1921         s->codec->codec_read = rdcodec;
1922         s->codec->codec_write = wrcodec;
1923         s->codec->codec_wait = waitcodec;
1924
1925         if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1926                             0x30, "Au1550 AC97")) {
1927                 err("AC'97 ports in use");
1928         }
1929
1930         /* Allocate the DMA Channels
1931         */
1932         if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1933             DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1934                 err("Can't get DAC DMA");
1935                 goto err_dma1;
1936         }
1937         au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1938         if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1939                                         NUM_DBDMA_DESCRIPTORS) == 0) {
1940                 err("Can't get DAC DMA descriptors");
1941                 goto err_dma1;
1942         }
1943
1944         if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1945             DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1946                 err("Can't get ADC DMA");
1947                 goto err_dma2;
1948         }
1949         au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1950         if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1951                                         NUM_DBDMA_DESCRIPTORS) == 0) {
1952                 err("Can't get ADC DMA descriptors");
1953                 goto err_dma2;
1954         }
1955
1956         pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1957
1958         /* register devices */
1959
1960         if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1961                 goto err_dev1;
1962         if ((s->codec->dev_mixer =
1963              register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1964                 goto err_dev2;
1965
1966         /* The GPIO for the appropriate PSC was configured by the
1967          * board specific start up.
1968          *
1969          * configure PSC for AC'97
1970          */
1971         au_writel(0, AC97_PSC_CTRL);    /* Disable PSC */
1972         au_sync();
1973         au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1974         au_sync();
1975
1976         /* cold reset the AC'97
1977         */
1978         au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1979         au_sync();
1980         au1550_delay(10);
1981         au_writel(0, PSC_AC97RST);
1982         au_sync();
1983
1984         /* need to delay around 500msec(bleech) to give
1985            some CODECs enough time to wakeup */
1986         au1550_delay(500);
1987
1988         /* warm reset the AC'97 to start the bitclk
1989         */
1990         au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1991         au_sync();
1992         udelay(100);
1993         au_writel(0, PSC_AC97RST);
1994         au_sync();
1995
1996         /* Enable PSC
1997         */
1998         au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1999         au_sync();
2000
2001         /* Wait for PSC ready.
2002         */
2003         do {
2004                 val = au_readl(PSC_AC97STAT);
2005                 au_sync();
2006         } while ((val & PSC_AC97STAT_SR) == 0);
2007
2008         /* Configure AC97 controller.
2009          * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
2010          */
2011         val = PSC_AC97CFG_SET_LEN(16);
2012         val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2013
2014         /* Enable device so we can at least
2015          * talk over the AC-link.
2016          */
2017         au_writel(val, PSC_AC97CFG);
2018         au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2019         au_sync();
2020         val |= PSC_AC97CFG_DE_ENABLE;
2021         au_writel(val, PSC_AC97CFG);
2022         au_sync();
2023
2024         /* Wait for Device ready.
2025         */
2026         do {
2027                 val = au_readl(PSC_AC97STAT);
2028                 au_sync();
2029         } while ((val & PSC_AC97STAT_DR) == 0);
2030
2031         /* codec init */
2032         if (!ac97_probe_codec(s->codec))
2033                 goto err_dev3;
2034
2035         s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2036         s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2037         pr_info("AC'97 Base/Extended ID = %04x/%04x",
2038              s->codec_base_caps, s->codec_ext_caps);
2039
2040         if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2041                 /* codec does not support VRA
2042                 */
2043                 s->no_vra = 1;
2044         } else if (!vra) {
2045                 /* Boot option says disable VRA
2046                 */
2047                 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2048                 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2049                         ac97_extstat & ~AC97_EXTSTAT_VRA);
2050                 s->no_vra = 1;
2051         }
2052         if (s->no_vra)
2053                 pr_info("no VRA, interpolating and decimating");
2054
2055         /* set mic to be the recording source */
2056         val = SOUND_MASK_MIC;
2057         mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2058                      (unsigned long) &val);
2059
2060         return 0;
2061
2062  err_dev3:
2063         unregister_sound_mixer(s->codec->dev_mixer);
2064  err_dev2:
2065         unregister_sound_dsp(s->dev_audio);
2066  err_dev1:
2067         au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2068  err_dma2:
2069         au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2070  err_dma1:
2071         release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2072
2073         ac97_release_codec(s->codec);
2074         return -1;
2075 }
2076
2077 static void __devinit
2078 au1550_remove(void)
2079 {
2080         struct au1550_state *s = &au1550_state;
2081
2082         if (!s)
2083                 return;
2084         synchronize_irq();
2085         au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2086         au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2087         release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2088         unregister_sound_dsp(s->dev_audio);
2089         unregister_sound_mixer(s->codec->dev_mixer);
2090         ac97_release_codec(s->codec);
2091 }
2092
2093 static int __init
2094 init_au1550(void)
2095 {
2096         return au1550_probe();
2097 }
2098
2099 static void __exit
2100 cleanup_au1550(void)
2101 {
2102         au1550_remove();
2103 }
2104
2105 module_init(init_au1550);
2106 module_exit(cleanup_au1550);
2107
2108 #ifndef MODULE
2109
2110 static int __init
2111 au1550_setup(char *options)
2112 {
2113         char           *this_opt;
2114
2115         if (!options || !*options)
2116                 return 0;
2117
2118         while ((this_opt = strsep(&options, ","))) {
2119                 if (!*this_opt)
2120                         continue;
2121                 if (!strncmp(this_opt, "vra", 3)) {
2122                         vra = 1;
2123                 }
2124         }
2125
2126         return 1;
2127 }
2128
2129 __setup("au1550_audio=", au1550_setup);
2130
2131 #endif /* MODULE */