sound/oss/ad1889.c

   1 /*
   2  *  Copyright 2001-2004 Randolph Chung <tausq@debian.org>
   3  *
   4  *  Analog Devices 1889 PCI audio driver (AD1819 AC97-compatible codec)
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  *   Notes:
  21  *   1. Only flat DMA is supported; s-g is not supported right now
  22  *
  23  *
  24 <jsm> tausq: Anyway, to set up sample rates for D to A, you just use the sample rate on the codec. For A to D, you need to set the codec always to 48K (using the split sample rate feature on the codec) and then set the resampler on the AD1889 to the sample rate you want.
  25 <jsm> Also, when changing the sample rate on the codec you need to power it down and re power it up for the change to take effect!
  26  *
  27  * $Id: ad1889.c,v 1.3 2002/10/19 21:31:44 grundler Exp $
  28  */
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/ioport.h>
  32 #include <linux/pci.h>
  33 #include <linux/poll.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/slab.h>
  36 #include <linux/soundcard.h>
  37 #include <linux/ac97_codec.h>
  38 #include <linux/sound.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/mutex.h>
  41
  42 #include <asm/delay.h>
  43 #include <asm/io.h>
  44 #include <asm/dma.h>
  45 #include <asm/uaccess.h>
  46
  47 #include "ad1889.h"
  48
  49 #define DBG(fmt, arg...) printk(fmt, ##arg)
  50 #define DEVNAME "ad1889"
  51
  52 #define NR_HW_CH        4
  53 #define DAC_RUNNING     1
  54 #define ADC_RUNNING     2
  55
  56 #define UNDERRUN(dev)   (0)
  57
  58 #define AD1889_READW(dev,reg) readw(dev->regbase + reg)
  59 #define AD1889_WRITEW(dev,reg,val) writew((val), dev->regbase + reg)
  60 #define AD1889_READL(dev,reg) readl(dev->regbase + reg)
  61 #define AD1889_WRITEL(dev,reg,val) writel((val), dev->regbase + reg)
  62
  63 //now 100ms
  64 /* #define WAIT_10MS()  schedule_timeout(HZ/10) */
  65 #define WAIT_10MS()     do { int __i; for (__i = 0; __i < 100; __i++) udelay(1000); } while(0)
  66
  67 /* currently only support a single device */
  68 static ad1889_dev_t *ad1889_dev = NULL;
  69
  70 /************************* helper routines ***************************** */
  71 static inline void ad1889_set_wav_rate(ad1889_dev_t *dev, int rate)
  72 {
  73         struct ac97_codec *ac97_codec = dev->ac97_codec;
  74
  75         DBG("Setting WAV rate to %d\n", rate);
  76         dev->state[AD_WAV_STATE].dmabuf.rate = rate;
  77         AD1889_WRITEW(dev, AD_DS_WAS, rate);
  78
  79         /* Cycle the DAC to enable the new rate */
  80         ac97_codec->codec_write(dev->ac97_codec, AC97_POWER_CONTROL, 0x0200);
  81         WAIT_10MS();
  82         ac97_codec->codec_write(dev->ac97_codec, AC97_POWER_CONTROL, 0);
  83 }
  84
  85 static inline void ad1889_set_wav_fmt(ad1889_dev_t *dev, int fmt)
  86 {
  87         u16 tmp;
  88
  89         DBG("Setting WAV format to 0x%x\n", fmt);
  90
  91         tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
  92         if (fmt & AFMT_S16_LE) {
  93                 //tmp |= 0x0100; /* set WA16 */
  94                 tmp |= 0x0300; /* set WA16 stereo */
  95         } else if (fmt & AFMT_U8) {
  96                 tmp &= ~0x0100; /* clear WA16 */
  97         }
  98         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
  99 }
 100
 101 static inline void ad1889_set_adc_fmt(ad1889_dev_t *dev, int fmt)
 102 {
 103         u16 tmp;
 104
 105         DBG("Setting ADC format to 0x%x\n", fmt);
 106
 107         tmp = AD1889_READW(ad1889_dev, AD_DS_RAMC);
 108         if (fmt & AFMT_S16_LE) {
 109                 tmp |= 0x0100; /* set WA16 */
 110         } else if (fmt & AFMT_U8) {
 111                 tmp &= ~0x0100; /* clear WA16 */
 112         }
 113         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, tmp);
 114 }
 115
 116 static void ad1889_start_wav(ad1889_state_t *state)
 117 {
 118         unsigned long flags;
 119         struct dmabuf *dmabuf = &state->dmabuf;
 120         int cnt;
 121         u16 tmp;
 122
 123         spin_lock_irqsave(&state->card->lock, flags);
 124
 125         if (dmabuf->dma_len)    /* DMA already in flight */
 126                 goto skip_dma;
 127
 128         /* setup dma */
 129         cnt = dmabuf->wr_ptr - dmabuf->rd_ptr;
 130         if (cnt == 0)           /* done - don't need to do anything */
 131                 goto skip_dma;
 132
 133         /* If the wr_ptr has wrapped, only map to the end */
 134         if (cnt < 0)
 135                 cnt = DMA_SIZE - dmabuf->rd_ptr;
 136
 137         dmabuf->dma_handle = pci_map_single(ad1889_dev->pci,
 138                                         dmabuf->rawbuf + dmabuf->rd_ptr,
 139                                         cnt, PCI_DMA_TODEVICE);
 140         dmabuf->dma_len = cnt;
 141         dmabuf->ready = 1;
 142
 143         DBG("Starting playback at 0x%p for %ld bytes\n", dmabuf->rawbuf +
 144             dmabuf->rd_ptr, dmabuf->dma_len);
 145
 146         /* load up the current register set */
 147         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVCC, cnt);
 148         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVICC, cnt);
 149         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVCA, dmabuf->dma_handle);
 150
 151         /* TODO: for now we load the base registers with the same thing */
 152         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVBC, cnt);
 153         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVIBC, cnt);
 154         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVBA, dmabuf->dma_handle);
 155
 156         /* and we're off to the races... */
 157         AD1889_WRITEL(ad1889_dev, AD_DMA_CHSS, 0x8);
 158         tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
 159         tmp |= 0x0400; /* set WAEN */
 160         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
 161         (void) AD1889_READW(ad1889_dev, AD_DS_WSMC); /* flush posted PCI write */
 162
 163         dmabuf->enable |= DAC_RUNNING;
 164
 165 skip_dma:
 166         spin_unlock_irqrestore(&state->card->lock, flags);
 167 }
 168
 169
 170 static void ad1889_stop_wav(ad1889_state_t *state)
 171 {
 172         unsigned long flags;
 173         struct dmabuf *dmabuf = &state->dmabuf;
 174
 175         spin_lock_irqsave(&state->card->lock, flags);
 176
 177         if (dmabuf->enable & DAC_RUNNING) {
 178                 u16 tmp;
 179                 unsigned long cnt = dmabuf->dma_len;
 180
 181                 tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
 182                 tmp &= ~0x0400; /* clear WAEN */
 183                 AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
 184                 (void) AD1889_READW(ad1889_dev, AD_DS_WSMC); /* flush posted PCI write */
 185                 pci_unmap_single(ad1889_dev->pci, dmabuf->dma_handle,
 186                                 cnt, PCI_DMA_TODEVICE);
 187
 188                 dmabuf->enable &= ~DAC_RUNNING;
 189
 190                 /* update dma pointers */
 191                 dmabuf->rd_ptr += cnt;
 192                 dmabuf->rd_ptr &= (DMA_SIZE - 1);
 193
 194                 dmabuf->dma_handle = 0;
 195                 dmabuf->dma_len = 0;
 196                 dmabuf->ready = 0;
 197
 198                 wake_up(&dmabuf->wait);
 199         }
 200
 201         spin_unlock_irqrestore(&state->card->lock, flags);
 202 }
 203
 204
 205 #if 0
 206 static void ad1889_startstop_adc(ad1889_state_t *state, int start)
 207 {
 208         u16 tmp;
 209         unsigned long flags;
 210
 211         spin_lock_irqsave(&state->card->lock, flags);
 212
 213         tmp = AD1889_READW(ad1889_dev, AD_DS_RAMC);
 214         if (start) {
 215                 state->dmabuf.enable |= ADC_RUNNING;
 216                 tmp |= 0x0004; /* set ADEN */
 217         } else {
 218                 state->dmabuf.enable &= ~ADC_RUNNING;
 219                 tmp &= ~0x0004; /* clear ADEN */
 220         }
 221         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, tmp);
 222
 223         spin_unlock_irqrestore(&state->card->lock, flags);
 224 }
 225 #endif
 226
 227 static ad1889_dev_t *ad1889_alloc_dev(struct pci_dev *pci)
 228 {
 229         ad1889_dev_t *dev;
 230         struct dmabuf *dmabuf;
 231         int i;
 232
 233         if ((dev = kzalloc(sizeof(ad1889_dev_t), GFP_KERNEL)) == NULL)
 234                 return NULL;
 235         spin_lock_init(&dev->lock);
 236         dev->pci = pci;
 237
 238         for (i = 0; i < AD_MAX_STATES; i++) {
 239                 dev->state[i].card = dev;
 240                 mutex_init(&dev->state[i].mutex);
 241                 init_waitqueue_head(&dev->state[i].dmabuf.wait);
 242         }
 243
 244         /* allocate dma buffer */
 245
 246         for (i = 0; i < AD_MAX_STATES; i++) {
 247                 dmabuf = &dev->state[i].dmabuf;
 248                 dmabuf->rawbuf = kmalloc(DMA_SIZE, GFP_KERNEL|GFP_DMA);
 249                 if (!dmabuf->rawbuf)
 250                         goto err_free_dmabuf;
 251                 dmabuf->rawbuf_size = DMA_SIZE;
 252                 dmabuf->dma_handle = 0;
 253                 dmabuf->rd_ptr = dmabuf->wr_ptr = dmabuf->dma_len = 0UL;
 254                 dmabuf->ready = 0;
 255                 dmabuf->rate = 48000;
 256         }
 257         return dev;
 258
 259 err_free_dmabuf:
 260         while (--i >= 0)
 261                 kfree(dev->state[i].dmabuf.rawbuf);
 262         kfree(dev);
 263         return NULL;
 264 }
 265
 266 static void ad1889_free_dev(ad1889_dev_t *dev)
 267 {
 268         int j;
 269         struct dmabuf *dmabuf;
 270
 271         if (dev == NULL)
 272                 return;
 273
 274         if (dev->ac97_codec)
 275                 ac97_release_codec(dev->ac97_codec);
 276
 277         for (j = 0; j < AD_MAX_STATES; j++) {
 278                 dmabuf = &dev->state[j].dmabuf;
 279                 kfree(dmabuf->rawbuf);
 280         }
 281
 282         kfree(dev);
 283 }
 284
 285 static inline void ad1889_trigger_playback(ad1889_dev_t *dev)
 286 {
 287 #if 0
 288         u32 val;
 289         struct dmabuf *dmabuf = &dev->state[AD_WAV_STATE].dmabuf;
 290 #endif
 291
 292         ad1889_start_wav(&dev->state[AD_WAV_STATE]);
 293 }
 294
 295 static int ad1889_read_proc (char *page, char **start, off_t off,
 296                              int count, int *eof, void *data)
 297 {
 298         char *out = page;
 299         int len, i;
 300         ad1889_dev_t *dev = data;
 301         ad1889_reg_t regs[] = {
 302                 { "WSMC", AD_DS_WSMC, 16 },
 303                 { "RAMC", AD_DS_RAMC, 16 },
 304                 { "WADA", AD_DS_WADA, 16 },
 305                 { "SYDA", AD_DS_SYDA, 16 },
 306                 { "WAS", AD_DS_WAS, 16 },
 307                 { "RES", AD_DS_RES, 16 },
 308                 { "CCS", AD_DS_CCS, 16 },
 309                 { "ADCBA", AD_DMA_ADCBA, 32 },
 310                 { "ADCCA", AD_DMA_ADCCA, 32 },
 311                 { "ADCBC", AD_DMA_ADCBC, 32 },
 312                 { "ADCCC", AD_DMA_ADCCC, 32 },
 313                 { "ADCIBC", AD_DMA_ADCIBC, 32 },
 314                 { "ADCICC", AD_DMA_ADCICC, 32 },
 315                 { "ADCCTRL", AD_DMA_ADCCTRL, 16 },
 316                 { "WAVBA", AD_DMA_WAVBA, 32 },
 317                 { "WAVCA", AD_DMA_WAVCA, 32 },
 318                 { "WAVBC", AD_DMA_WAVBC, 32 },
 319                 { "WAVCC", AD_DMA_WAVCC, 32 },
 320                 { "WAVIBC", AD_DMA_WAVIBC, 32 },
 321                 { "WAVICC", AD_DMA_WAVICC, 32 },
 322                 { "WAVCTRL", AD_DMA_WAVCTRL, 16 },
 323                 { "DISR", AD_DMA_DISR, 32 },
 324                 { "CHSS", AD_DMA_CHSS, 32 },
 325                 { "IPC", AD_GPIO_IPC, 16 },
 326                 { "OP", AD_GPIO_OP, 16 },
 327                 { "IP", AD_GPIO_IP, 16 },
 328                 { "ACIC", AD_AC97_ACIC, 16 },
 329                 { "AC97_RESET", AD_AC97_BASE + AC97_RESET, 16 },
 330                 { "AC97_MASTER_VOL_STEREO", AD_AC97_BASE + AC97_MASTER_VOL_STEREO, 16 },
 331                 { "AC97_HEADPHONE_VOL", AD_AC97_BASE + AC97_HEADPHONE_VOL, 16 },
 332                 { "AC97_MASTER_VOL_MONO", AD_AC97_BASE + AC97_MASTER_VOL_MONO, 16 },
 333                 { "AC97_MASTER_TONE", AD_AC97_BASE + AC97_MASTER_TONE, 16 },
 334                 { "AC97_PCBEEP_VOL", AD_AC97_BASE + AC97_PCBEEP_VOL, 16 },
 335                 { "AC97_PHONE_VOL", AD_AC97_BASE + AC97_PHONE_VOL, 16 },
 336                 { "AC97_MIC_VOL", AD_AC97_BASE + AC97_MIC_VOL, 16 },
 337                 { "AC97_LINEIN_VOL", AD_AC97_BASE + AC97_LINEIN_VOL, 16 },
 338                 { "AC97_CD_VOL", AD_AC97_BASE + AC97_CD_VOL, 16 },
 339                 { "AC97_VIDEO_VOL", AD_AC97_BASE + AC97_VIDEO_VOL, 16 },
 340                 { "AC97_AUX_VOL", AD_AC97_BASE + AC97_AUX_VOL, 16 },
 341                 { "AC97_PCMOUT_VOL", AD_AC97_BASE + AC97_PCMOUT_VOL, 16 },
 342                 { "AC97_RECORD_SELECT", AD_AC97_BASE + AC97_RECORD_SELECT, 16 },
 343                 { "AC97_RECORD_GAIN", AD_AC97_BASE + AC97_RECORD_GAIN, 16 },
 344                 { "AC97_RECORD_GAIN_MIC", AD_AC97_BASE + AC97_RECORD_GAIN_MIC, 16 },
 345                 { "AC97_GENERAL_PURPOSE", AD_AC97_BASE + AC97_GENERAL_PURPOSE, 16 },
 346                 { "AC97_3D_CONTROL", AD_AC97_BASE + AC97_3D_CONTROL, 16 },
 347                 { "AC97_MODEM_RATE", AD_AC97_BASE + AC97_MODEM_RATE, 16 },
 348                 { "AC97_POWER_CONTROL", AD_AC97_BASE + AC97_POWER_CONTROL, 16 },
 349                 { NULL }
 350         };
 351
 352         if (dev == NULL)
 353                 return -ENODEV;
 354
 355         for (i = 0; regs[i].name != 0; i++)
 356                 out += sprintf(out, "%s: 0x%0*x\n", regs[i].name,
 357                         regs[i].width >> 2,
 358                         (regs[i].width == 16
 359                                 ? AD1889_READW(dev, regs[i].offset)
 360                                 : AD1889_READL(dev, regs[i].offset)));
 361
 362         for (i = 0; i < AD_MAX_STATES; i++) {
 363                 out += sprintf(out, "DMA status for %s:\n",
 364                         (i == AD_WAV_STATE ? "WAV" : "ADC"));
 365                 out += sprintf(out, "\t\t0x%p (IOVA: 0x%llu)\n",
 366                         dev->state[i].dmabuf.rawbuf,
 367                         (unsigned long long)dev->state[i].dmabuf.dma_handle);
 368
 369                 out += sprintf(out, "\tread ptr: offset %u\n",
 370                         (unsigned int)dev->state[i].dmabuf.rd_ptr);
 371                 out += sprintf(out, "\twrite ptr: offset %u\n",
 372                         (unsigned int)dev->state[i].dmabuf.wr_ptr);
 373                 out += sprintf(out, "\tdma len: offset %u\n",
 374                         (unsigned int)dev->state[i].dmabuf.dma_len);
 375         }
 376
 377         len = out - page - off;
 378         if (len < count) {
 379                 *eof = 1;
 380                 if (len <= 0) return 0;
 381         } else {
 382                 len = count;
 383         }
 384         *start = page + off;
 385         return len;
 386 }
 387
 388 /***************************** DMA interfaces ************************** */
 389 #if 0
 390 static inline unsigned long ad1889_get_dma_addr(ad1889_state_t *state)
 391 {
 392         struct dmabuf *dmabuf = &state->dmabuf;
 393         u32 offset;
 394
 395         if (!(dmabuf->enable & (DAC_RUNNING | ADC_RUNNING))) {
 396                 printk(KERN_ERR DEVNAME ": get_dma_addr called without dma enabled\n");
 397                 return 0;
 398         }
 399
 400         if (dmabuf->enable & DAC_RUNNING)
 401                 offset = le32_to_cpu(AD1889_READL(state->card, AD_DMA_WAVBA));
 402         else
 403                 offset = le32_to_cpu(AD1889_READL(state->card, AD_DMA_ADCBA));
 404
 405         return (unsigned long)bus_to_virt((unsigned long)offset) - (unsigned long)dmabuf->rawbuf;
 406 }
 407
 408 static void ad1889_update_ptr(ad1889_dev_t *dev, int wake)
 409 {
 410         ad1889_state_t *state;
 411         struct dmabuf *dmabuf;
 412         unsigned long hwptr;
 413         int diff;
 414
 415         /* check ADC first */
 416         state = &dev->adc_state;
 417         dmabuf = &state->dmabuf;
 418         if (dmabuf->enable & ADC_RUNNING) {
 419                 hwptr = ad1889_get_dma_addr(state);
 420                 diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
 421
 422                 dmabuf->hwptr = hwptr;
 423                 dmabuf->total_bytes += diff;
 424                 dmabuf->count += diff;
 425                 if (dmabuf->count > dmabuf->dmasize)
 426                         dmabuf->count = dmabuf->dmasize;
 427
 428                 if (dmabuf->mapped) {
 429                         if (wake & dmabuf->count >= dmabuf->fragsize)
 430                                 wake_up(&dmabuf->wait);
 431                 } else {
 432                         if (wake & dmabuf->count > 0)
 433                                 wake_up(&dmabuf->wait);
 434                 }
 435         }
 436
 437         /* check DAC */
 438         state = &dev->wav_state;
 439         dmabuf = &state->dmabuf;
 440         if (dmabuf->enable & DAC_RUNNING) {
 441 XXX
 442
 443 }
 444 #endif
 445
 446 /************************* /dev/dsp interfaces ************************* */
 447
 448 static ssize_t ad1889_read(struct file *file, char __user *buffer, size_t count,
 449         loff_t *ppos)
 450 {
 451         return 0;
 452 }
 453
 454 static ssize_t ad1889_write(struct file *file, const char __user *buffer, size_t count,
 455         loff_t *ppos)
 456 {
 457         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
 458         ad1889_state_t *state = &dev->state[AD_WAV_STATE];
 459         volatile struct dmabuf *dmabuf = &state->dmabuf;
 460         ssize_t ret = 0;
 461         DECLARE_WAITQUEUE(wait, current);
 462
 463         mutex_lock(&state->mutex);
 464 #if 0
 465         if (dmabuf->mapped) {
 466                 ret = -ENXIO;
 467                 goto err1;
 468         }
 469 #endif
 470         if (!access_ok(VERIFY_READ, buffer, count)) {
 471                 ret = -EFAULT;
 472                 goto err1;
 473         }
 474
 475         add_wait_queue(&state->dmabuf.wait, &wait);
 476
 477         /* start filling dma buffer.... */
 478         while (count > 0) {
 479                 long rem;
 480                 long cnt = count;
 481                 unsigned long flags;
 482
 483                 for (;;) {
 484                         long used_bytes;
 485                         long timeout;   /* max time for DMA in jiffies */
 486
 487                         /* buffer is full if wr catches up to rd */
 488                         spin_lock_irqsave(&state->card->lock, flags);
 489                         used_bytes = dmabuf->wr_ptr - dmabuf->rd_ptr;
 490                         timeout = (dmabuf->dma_len * HZ) / dmabuf->rate;
 491                         spin_unlock_irqrestore(&state->card->lock, flags);
 492
 493                         /* adjust for buffer wrap around */
 494                         used_bytes = (used_bytes + DMA_SIZE) & (DMA_SIZE - 1);
 495
 496                         /* If at least one page unused */
 497                         if (used_bytes < (DMA_SIZE - 0x1000))
 498                                 break;
 499
 500                         /* dma buffer full */
 501
 502                         if (file->f_flags & O_NONBLOCK) {
 503                                 ret = -EAGAIN;
 504                                 goto err2;
 505                         }
 506
 507                         set_current_state(TASK_INTERRUPTIBLE);
 508                         schedule_timeout(timeout + 1);
 509                         if (signal_pending(current)) {
 510                                 ret = -ERESTARTSYS;
 511                                 goto err2;
 512                         }
 513                 }
 514
 515                 /* watch out for wrapping around static buffer */
 516                 spin_lock_irqsave(&state->card->lock, flags);
 517                 rem = DMA_SIZE - dmabuf->wr_ptr;
 518                 if (cnt > rem)
 519                         cnt = rem;
 520
 521                 rem = dmabuf->wr_ptr;
 522
 523                 /* update dma pointers */
 524                 dmabuf->wr_ptr += cnt;
 525                 dmabuf->wr_ptr &= DMA_SIZE - 1; /* wrap ptr if necessary */
 526                 spin_unlock_irqrestore(&state->card->lock, flags);
 527
 528                 /* transfer unwrapped chunk */
 529                 if (copy_from_user(dmabuf->rawbuf + rem, buffer, cnt)) {
 530                         ret = -EFAULT;
 531                         goto err2;
 532                 }
 533
 534                 DBG("Writing 0x%lx bytes to +0x%lx\n", cnt, rem);
 535
 536                 /* update counters */
 537                 count -= cnt;
 538                 buffer += cnt;
 539                 ret += cnt;
 540
 541                 /* we have something to play - go play it! */
 542                 ad1889_trigger_playback(dev);
 543         }
 544
 545 err2:
 546         remove_wait_queue(&state->dmabuf.wait, &wait);
 547 err1:
 548         mutex_unlock(&state->mutex);
 549         return ret;
 550 }
 551
 552 static unsigned int ad1889_poll(struct file *file, struct poll_table_struct *wait)
 553 {
 554         unsigned int mask = 0;
 555 #if 0
 556         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
 557         ad1889_state_t *state = NULL;
 558         struct dmabuf *dmabuf;
 559         unsigned long flags;
 560
 561         if (!(file->f_mode & (FMODE_READ | FMODE_WRITE)))
 562                 return -EINVAL;
 563
 564         if (file->f_mode & FMODE_WRITE) {
 565                 state = &dev->state[AD_WAV_STATE];
 566                 if (!state) return 0;
 567                 dmabuf = &state->dmabuf;
 568                 poll_wait(file, &dmabuf->wait, wait);
 569         }
 570
 571         if (file->f_mode & FMODE_READ) {
 572                 state = &dev->state[AD_ADC_STATE];
 573                 if (!state) return 0;
 574                 dmabuf = &state->dmabuf;
 575                 poll_wait(file, &dmabuf->wait, wait);
 576         }
 577
 578         spin_lock_irqsave(&dev->lock, flags);
 579         ad1889_update_ptr(dev, 0);
 580
 581         if (file->f_mode & FMODE_WRITE) {
 582                 state = &dev->state[WAV_STATE];
 583                 dmabuf = &state->dmabuf;
 584                 if (dmabuf->mapped) {
 585                         if (dmabuf->count >= (int)dmabuf->fragsize)
 586                                 mask |= POLLOUT | POLLWRNORM;
 587                 } else {
 588                         if ((int)dmabuf->dmasize >= dmabuf->count +
 589                                 (int)dmabuf->fragsize)
 590                                 mask |= POLLOUT | POLLWRNORM;
 591                 }
 592         }
 593
 594         if (file ->f_mode & FMODE_READ) {
 595                 state = &dev->state[AD_ADC_STATE];
 596                 dmabuf = &state->dmabuf;
 597                 if (dmabuf->count >= (int)dmabuf->fragsize)
 598                         mask |= POLLIN | POLLRDNORM;
 599         }
 600         spin_unlock_irqrestore(&dev->lock, flags);
 601
 602 #endif
 603         return mask;
 604 }
 605
 606 static int ad1889_mmap(struct file *file, struct vm_area_struct *vma)
 607 {
 608         return 0;
 609 }
 610
 611 static int ad1889_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 612         unsigned long arg)
 613 {
 614         int val = 0;
 615         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
 616         struct dmabuf *dmabuf;
 617         audio_buf_info abinfo;
 618         int __user *p = (int __user *)arg;
 619
 620         DBG("ad1889_ioctl cmd 0x%x arg %lu\n", cmd, arg);
 621
 622         switch (cmd)
 623         {
 624         case OSS_GETVERSION:
 625                 return put_user(SOUND_VERSION, p);
 626
 627         case SNDCTL_DSP_RESET:
 628                 break;
 629
 630         case SNDCTL_DSP_SYNC:
 631                 break;
 632
 633         case SNDCTL_DSP_SPEED:
 634                 /* set sampling rate */
 635                 if (get_user(val, p))
 636                         return -EFAULT;
 637                 if (val > 5400 && val < 48000)
 638                 {
 639                         if (file->f_mode & FMODE_WRITE)
 640                                 AD1889_WRITEW(ad1889_dev, AD_DS_WAS, val);
 641                         if (file->f_mode & FMODE_READ)
 642                                 AD1889_WRITEW(ad1889_dev, AD_DS_RES, val);
 643                 }
 644                 return 0;
 645
 646         case SNDCTL_DSP_STEREO: /* undocumented? */
 647                 if (get_user(val, p))
 648                         return -EFAULT;
 649                 if (file->f_mode & FMODE_READ) {
 650                         val = AD1889_READW(ad1889_dev, AD_DS_WSMC);
 651                         if (val) {
 652                                 val |= 0x0200;  /* set WAST */
 653                         } else {
 654                                 val &= ~0x0200; /* clear WAST */
 655                         }
 656                         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, val);
 657                 }
 658                 if (file->f_mode & FMODE_WRITE) {
 659                         val = AD1889_READW(ad1889_dev, AD_DS_RAMC);
 660                         if (val) {
 661                                 val |= 0x0002;  /* set ADST */
 662                         } else {
 663                                 val &= ~0x0002; /* clear ADST */
 664                         }
 665                         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, val);
 666                 }
 667
 668                 return 0;
 669
 670         case SNDCTL_DSP_GETBLKSIZE:
 671                 return put_user(DMA_SIZE, p);
 672
 673         case SNDCTL_DSP_GETFMTS:
 674                 return put_user(AFMT_S16_LE|AFMT_U8, p);
 675
 676         case SNDCTL_DSP_SETFMT:
 677                 if (get_user(val, p))
 678                         return -EFAULT;
 679
 680                 if (val == 0) {
 681                         if (file->f_mode & FMODE_READ)
 682                                 ad1889_set_adc_fmt(dev, val);
 683
 684                         if (file->f_mode & FMODE_WRITE)
 685                                 ad1889_set_wav_fmt(dev, val);
 686                 } else {
 687                         val = AFMT_S16_LE | AFMT_U8;
 688                 }
 689
 690                 return put_user(val, p);
 691
 692         case SNDCTL_DSP_CHANNELS:
 693                 break;
 694
 695         case SNDCTL_DSP_POST:
 696                 /* send all data to device */
 697                 break;
 698
 699         case SNDCTL_DSP_SUBDIVIDE:
 700                 break;
 701
 702         case SNDCTL_DSP_SETFRAGMENT:
 703                 /* not supported; uses fixed fragment sizes */
 704                 return put_user(DMA_SIZE, p);
 705
 706         case SNDCTL_DSP_GETOSPACE:
 707         case SNDCTL_DSP_GETISPACE:
 708                 /* space left in dma buffers */
 709                 if (cmd == SNDCTL_DSP_GETOSPACE)
 710                         dmabuf = &dev->state[AD_WAV_STATE].dmabuf;
 711                 else
 712                         dmabuf = &dev->state[AD_ADC_STATE].dmabuf;
 713                 abinfo.fragments = 1;
 714                 abinfo.fragstotal = 1;
 715                 abinfo.fragsize = DMA_SIZE;
 716                 abinfo.bytes = DMA_SIZE;
 717                 return copy_to_user(p, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
 718         case SNDCTL_DSP_NONBLOCK:
 719                 file->f_flags |= O_NONBLOCK;
 720                 return 0;
 721
 722         case SNDCTL_DSP_GETCAPS:
 723                 return put_user(0, p);
 724
 725         case SNDCTL_DSP_GETTRIGGER:
 726         case SNDCTL_DSP_SETTRIGGER:
 727                 break;
 728
 729         case SNDCTL_DSP_GETIPTR:
 730         case SNDCTL_DSP_GETOPTR:
 731                 break;
 732
 733         case SNDCTL_DSP_SETDUPLEX:
 734                 break;
 735
 736         case SNDCTL_DSP_GETODELAY:
 737                 break;
 738
 739         case SOUND_PCM_READ_RATE:
 740                 return put_user(AD1889_READW(ad1889_dev, AD_DS_WAS), p);
 741
 742         case SOUND_PCM_READ_CHANNELS:
 743         case SOUND_PCM_READ_BITS:
 744                 break;
 745
 746         case SNDCTL_DSP_MAPINBUF:
 747         case SNDCTL_DSP_MAPOUTBUF:
 748         case SNDCTL_DSP_SETSYNCRO:
 749         case SOUND_PCM_WRITE_FILTER:
 750         case SOUND_PCM_READ_FILTER:
 751                 break;
 752
 753         default:
 754                 break;
 755         }
 756
 757         return -ENOTTY;
 758 }
 759
 760 static int ad1889_open(struct inode *inode, struct file *file)
 761 {
 762         /* check minor; only support /dev/dsp atm */
 763         if (iminor(inode) != 3)
 764                 return -ENXIO;
 765
 766         file->private_data = ad1889_dev;
 767
 768         ad1889_set_wav_rate(ad1889_dev, 48000);
 769         ad1889_set_wav_fmt(ad1889_dev, AFMT_S16_LE);
 770         AD1889_WRITEW(ad1889_dev, AD_DS_WADA, 0x0404); /* attenuation */
 771         return nonseekable_open(inode, file);
 772 }
 773
 774 static int ad1889_release(struct inode *inode, struct file *file)
 775 {
 776         /* if we have state free it here */
 777         return 0;
 778 }
 779
 780 static const struct file_operations ad1889_fops = {
 781         .owner          = THIS_MODULE,
 782         .llseek         = no_llseek,
 783         .read           = ad1889_read,
 784         .write          = ad1889_write,
 785         .poll           = ad1889_poll,
 786         .ioctl          = ad1889_ioctl,
 787         .mmap           = ad1889_mmap,
 788         .open           = ad1889_open,
 789         .release        = ad1889_release,
 790 };
 791
 792 /************************* /dev/mixer interfaces ************************ */
 793 static int ad1889_mixer_open(struct inode *inode, struct file *file)
 794 {
 795         if (ad1889_dev->ac97_codec->dev_mixer != iminor(inode))
 796                 return -ENODEV;
 797
 798         file->private_data = ad1889_dev->ac97_codec;
 799         return 0;
 800 }
 801
 802 static int ad1889_mixer_release(struct inode *inode, struct file *file)
 803 {
 804         return 0;
 805 }
 806
 807 static int ad1889_mixer_ioctl(struct inode *inode, struct file *file,
 808         unsigned int cmd, unsigned long arg)
 809 {
 810         struct ac97_codec *codec = (struct ac97_codec *)file->private_data;
 811         return codec->mixer_ioctl(codec, cmd, arg);
 812 }
 813
 814 static const struct file_operations ad1889_mixer_fops = {
 815         .owner          = THIS_MODULE,
 816         .llseek         = no_llseek,
 817         .ioctl          = ad1889_mixer_ioctl,
 818         .open           = ad1889_mixer_open,
 819         .release        = ad1889_mixer_release,
 820 };
 821
 822 /************************* AC97 interfaces ****************************** */
 823 static void ad1889_codec_write(struct ac97_codec *ac97, u8 reg, u16 val)
 824 {
 825         ad1889_dev_t *dev = ac97->private_data;
 826
 827         //DBG("Writing 0x%x to 0x%lx\n", val, dev->regbase + AD_AC97_BASE + reg);
 828         AD1889_WRITEW(dev, AD_AC97_BASE + reg, val);
 829 }
 830
 831 static u16 ad1889_codec_read(struct ac97_codec *ac97, u8 reg)
 832 {
 833         ad1889_dev_t *dev = ac97->private_data;
 834         //DBG("Reading from 0x%lx\n", dev->regbase + AD_AC97_BASE + reg);
 835         return AD1889_READW(dev, AD_AC97_BASE + reg);
 836 }
 837
 838 static int ad1889_ac97_init(ad1889_dev_t *dev, int id)
 839 {
 840         struct ac97_codec *ac97;
 841         u16 eid;
 842
 843         if ((ac97 = ac97_alloc_codec()) == NULL)
 844                 return -ENOMEM;
 845
 846         ac97->private_data = dev;
 847         ac97->id = id;
 848
 849         ac97->codec_read = ad1889_codec_read;
 850         ac97->codec_write = ad1889_codec_write;
 851
 852         if (ac97_probe_codec(ac97) == 0) {
 853                 printk(DEVNAME ": ac97_probe_codec failed\n");
 854                 goto out_free;
 855         }
 856
 857         eid = ad1889_codec_read(ac97, AC97_EXTENDED_ID);
 858         if (eid == 0xffff) {
 859                 printk(KERN_WARNING DEVNAME ": no codec attached?\n");
 860                 goto out_free;
 861         }
 862
 863         dev->ac97_features = eid;
 864
 865         if ((ac97->dev_mixer = register_sound_mixer(&ad1889_mixer_fops, -1)) < 0) {
 866                 printk(KERN_ERR DEVNAME ": cannot register mixer\n");
 867                 goto out_free;
 868         }
 869
 870         dev->ac97_codec = ac97;
 871         return 0;
 872
 873 out_free:
 874         ac97_release_codec(ac97);
 875         return -ENODEV;
 876 }
 877
 878 static int ad1889_aclink_reset(struct pci_dev * pcidev)
 879 {
 880         u16 stat;
 881         int retry = 200;
 882         ad1889_dev_t *dev = pci_get_drvdata(pcidev);
 883
 884         AD1889_WRITEW(dev, AD_DS_CCS, 0x8000); /* turn on clock */
 885         AD1889_READW(dev, AD_DS_CCS);
 886
 887         WAIT_10MS();
 888
 889         stat = AD1889_READW(dev, AD_AC97_ACIC);
 890         stat |= 0x0002;                         /* Reset Disable */
 891         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
 892         (void) AD1889_READW(dev, AD_AC97_ACIC); /* flush posted write */
 893
 894         udelay(10);
 895
 896         stat = AD1889_READW(dev, AD_AC97_ACIC);
 897         stat |= 0x0001;                         /* Interface Enable */
 898         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
 899
 900         do {
 901                 if (AD1889_READW(dev, AD_AC97_ACIC) & 0x8000)   /* Ready */
 902                         break;
 903                 WAIT_10MS();
 904                 retry--;
 905         } while (retry > 0);
 906
 907         if (!retry) {
 908                 printk(KERN_ERR "ad1889_aclink_reset: codec is not ready [0x%x]\n",
 909                             AD1889_READW(dev, AD_AC97_ACIC));
 910                 return -EBUSY;
 911         }
 912
 913         /* TODO reset AC97 codec */
 914         /* TODO set wave/adc pci ctrl status */
 915
 916         stat = AD1889_READW(dev, AD_AC97_ACIC);
 917         stat |= 0x0004;                         /* Audio Stream Output Enable */
 918         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
 919         return 0;
 920 }
 921
 922 /************************* PCI interfaces ****************************** */
 923 /* PCI device table */
 924 static struct pci_device_id ad1889_id_tbl[] = {
 925         { PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS, PCI_ANY_ID,
 926           PCI_ANY_ID, 0, 0, (unsigned long)DEVNAME },
 927         { },
 928 };
 929 MODULE_DEVICE_TABLE(pci, ad1889_id_tbl);
 930
 931 static irqreturn_t ad1889_interrupt(int irq, void *dev_id)
 932 {
 933         u32 stat;
 934         ad1889_dev_t *dev = (ad1889_dev_t *)dev_id;
 935
 936         stat = AD1889_READL(dev, AD_DMA_DISR);
 937
 938         /* clear ISR */
 939         AD1889_WRITEL(dev, AD_DMA_DISR, stat);
 940
 941         if (stat & 0x8) {               /* WAVI */
 942                 DBG("WAV interrupt\n");
 943                 dev->stats.wav_intrs++;
 944                 if (dev->state[AD_WAV_STATE].dmabuf.ready) {
 945                         ad1889_stop_wav(&dev->state[AD_WAV_STATE]);     /* clean up */
 946                         ad1889_start_wav(&dev->state[AD_WAV_STATE]);    /* start new */
 947                 }
 948         }
 949
 950         if ((stat & 0x2) && dev->state[AD_ADC_STATE].dmabuf.ready) { /* ADCI */
 951                 DBG("ADC interrupt\n");
 952                 dev->stats.adc_intrs++;
 953         }
 954         if(stat)
 955                 return IRQ_HANDLED;
 956         return IRQ_NONE;
 957 }
 958
 959 static void ad1889_initcfg(ad1889_dev_t *dev)
 960 {
 961         u16 tmp16;
 962         u32 tmp32;
 963
 964         /* make sure the interrupt bits are setup the way we want */
 965         tmp32 = AD1889_READL(dev, AD_DMA_WAVCTRL);
 966         tmp32 &= ~0xff; /* flat dma, no sg, mask out the intr bits */
 967         tmp32 |= 0x6;  /* intr on count, loop */
 968         AD1889_WRITEL(dev, AD_DMA_WAVCTRL, tmp32);
 969
 970         /* unmute... */
 971         tmp16 = AD1889_READW(dev, AD_DS_WADA);
 972         tmp16 &= ~0x8080;
 973         AD1889_WRITEW(dev, AD_DS_WADA, tmp16);
 974 }
 975
 976 static int __devinit ad1889_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
 977 {
 978         int err;
 979         ad1889_dev_t *dev;
 980         unsigned long bar;
 981         struct proc_dir_entry *proc_root = NULL;
 982
 983         if ((err = pci_enable_device(pcidev)) != 0) {
 984                 printk(KERN_ERR DEVNAME ": pci_enable_device failed\n");
 985                 return err;
 986         }
 987
 988         pci_set_master(pcidev);
 989         if ((dev = ad1889_alloc_dev(pcidev)) == NULL) {
 990                 printk(KERN_ERR DEVNAME ": cannot allocate memory for device\n");
 991                 return -ENOMEM;
 992         }
 993         pci_set_drvdata(pcidev, dev);
 994         bar = pci_resource_start(pcidev, 0);
 995
 996         if (!(pci_resource_flags(pcidev, 0) & IORESOURCE_MEM)) {
 997                 printk(KERN_ERR DEVNAME ": memory region not assigned\n");
 998                 goto out1;
 999         }
1000
1001         if (pci_request_region(pcidev, 0, DEVNAME)) {
1002                 printk(KERN_ERR DEVNAME ": unable to request memory region\n");
1003                 goto out1;
1004         }
1005
1006         dev->regbase = ioremap_nocache(bar, AD_DS_IOMEMSIZE);
1007         if (!dev->regbase) {
1008                 printk(KERN_ERR DEVNAME ": unable to remap iomem\n");
1009                 goto out2;
1010         }
1011
1012         if (request_irq(pcidev->irq, ad1889_interrupt, IRQF_SHARED, DEVNAME, dev) != 0) {
1013                 printk(KERN_ERR DEVNAME ": unable to request interrupt\n");
1014                 goto out3;
1015         }
1016
1017         printk(KERN_INFO DEVNAME ": %s at %p IRQ %d\n",
1018                 (char *)ent->driver_data, dev->regbase, pcidev->irq);
1019
1020         if (ad1889_aclink_reset(pcidev) != 0)
1021                 goto out4;
1022
1023         /* register /dev/dsp */
1024         if ((dev->dev_audio = register_sound_dsp(&ad1889_fops, -1)) < 0) {
1025                 printk(KERN_ERR DEVNAME ": cannot register /dev/dsp\n");
1026                 goto out4;
1027         }
1028
1029         if ((err = ad1889_ac97_init(dev, 0)) != 0)
1030                 goto out5;
1031
1032         /* XXX: cleanups */
1033         if (((proc_root = proc_mkdir("driver/ad1889", NULL)) == NULL) ||
1034             create_proc_read_entry("ac97", S_IFREG|S_IRUGO, proc_root, ac97_read_proc, dev->ac97_codec) == NULL ||
1035             create_proc_read_entry("info", S_IFREG|S_IRUGO, proc_root, ad1889_read_proc, dev) == NULL)
1036                 goto out5;
1037
1038         ad1889_initcfg(dev);
1039
1040         //DBG(DEVNAME ": Driver initialization done!\n");
1041
1042         ad1889_dev = dev;
1043
1044         return 0;
1045
1046 out5:
1047         unregister_sound_dsp(dev->dev_audio);
1048 out4:
1049         free_irq(pcidev->irq, dev);
1050 out3:
1051         iounmap(dev->regbase);
1052 out2:
1053         pci_release_region(pcidev, 0);
1054 out1:
1055         ad1889_free_dev(dev);
1056         pci_set_drvdata(pcidev, NULL);
1057
1058         return -ENODEV;
1059 }
1060
1061 static void __devexit ad1889_remove(struct pci_dev *pcidev)
1062 {
1063         ad1889_dev_t *dev = pci_get_drvdata(pcidev);
1064
1065         if (dev == NULL) return;
1066
1067         unregister_sound_mixer(dev->ac97_codec->dev_mixer);
1068         unregister_sound_dsp(dev->dev_audio);
1069         free_irq(pcidev->irq, dev);
1070         iounmap(dev->regbase);
1071         pci_release_region(pcidev, 0);
1072
1073         /* any hw programming needed? */
1074         ad1889_free_dev(dev);
1075         pci_set_drvdata(pcidev, NULL);
1076 }
1077
1078 MODULE_AUTHOR("Randolph Chung");
1079 MODULE_DESCRIPTION("Analog Devices AD1889 PCI Audio");
1080 MODULE_LICENSE("GPL");
1081
1082 static struct pci_driver ad1889_driver = {
1083         .name           = DEVNAME,
1084         .id_table       = ad1889_id_tbl,
1085         .probe          = ad1889_probe,
1086         .remove         = __devexit_p(ad1889_remove),
1087 };
1088
1089 static int __init ad1889_init_module(void)
1090 {
1091         return pci_register_driver(&ad1889_driver);
1092 }
1093
1094 static void ad1889_exit_module(void)
1095 {
1096         pci_unregister_driver(&ad1889_driver);
1097         return;
1098 }
1099
1100 module_init(ad1889_init_module);
1101 module_exit(ad1889_exit_module);