sound/pci/ad1889.c

   1 /* Analog Devices 1889 audio driver
   2  *
   3  * This is a driver for the AD1889 PCI audio chipset found
   4  * on the HP PA-RISC [BCJ]-xxx0 workstations.
   5  *
   6  * Copyright (C) 2004-2005, Kyle McMartin <kyle@parisc-linux.org>
   7  * Copyright (C) 2005, Thibaut Varene <varenet@parisc-linux.org>
   8  *   Based on the OSS AD1889 driver by Randolph Chung <tausq@debian.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License, version 2, as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * TODO:
  24  *      Do we need to take care of CCS register?
  25  *      Maybe we could use finer grained locking (separate locks for pb/cap)?
  26  * Wishlist:
  27  *      Control Interface (mixer) support
  28  *      Better AC97 support (VSR...)?
  29  *      PM support
  30  *      MIDI support
  31  *      Game Port support
  32  *      SG DMA support (this will need *alot* of work)
  33  */
  34
  35 #include <linux/init.h>
  36 #include <linux/pci.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/slab.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/compiler.h>
  41 #include <linux/delay.h>
  42
  43 #include <sound/core.h>
  44 #include <sound/pcm.h>
  45 #include <sound/initval.h>
  46 #include <sound/ac97_codec.h>
  47
  48 #include <asm/io.h>
  49
  50 #include "ad1889.h"
  51 #include "ac97/ac97_id.h"
  52
  53 #define AD1889_DRVVER   "Version: 1.7"
  54
  55 MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
  56 MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
  57 MODULE_LICENSE("GPL");
  58 MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");
  59
  60 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  61 module_param_array(index, int, NULL, 0444);
  62 MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");
  63
  64 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  65 module_param_array(id, charp, NULL, 0444);
  66 MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");
  67
  68 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  69 module_param_array(enable, bool, NULL, 0444);
  70 MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");
  71
  72 static char *ac97_quirk[SNDRV_CARDS];
  73 module_param_array(ac97_quirk, charp, NULL, 0444);
  74 MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
  75
  76 #define DEVNAME "ad1889"
  77 #define PFX     DEVNAME ": "
  78
  79 /* let's use the global sound debug interfaces */
  80 #define ad1889_debug(fmt, arg...) snd_printd(KERN_DEBUG fmt, ## arg)
  81
  82 /* keep track of some hw registers */
  83 struct ad1889_register_state {
  84         u16 reg;        /* reg setup */
  85         u32 addr;       /* dma base address */
  86         unsigned long size;     /* DMA buffer size */
  87 };
  88
  89 struct snd_ad1889 {
  90         struct snd_card *card;
  91         struct pci_dev *pci;
  92
  93         int irq;
  94         unsigned long bar;
  95         void __iomem *iobase;
  96
  97         struct snd_ac97 *ac97;
  98         struct snd_ac97_bus *ac97_bus;
  99         struct snd_pcm *pcm;
 100         struct snd_info_entry *proc;
 101
 102         struct snd_pcm_substream *psubs;
 103         struct snd_pcm_substream *csubs;
 104
 105         /* playback register state */
 106         struct ad1889_register_state wave;
 107         struct ad1889_register_state ramc;
 108
 109         spinlock_t lock;
 110 };
 111
 112 static inline u16
 113 ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
 114 {
 115         return readw(chip->iobase + reg);
 116 }
 117
 118 static inline void
 119 ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
 120 {
 121         writew(val, chip->iobase + reg);
 122 }
 123
 124 static inline u32
 125 ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
 126 {
 127         return readl(chip->iobase + reg);
 128 }
 129
 130 static inline void
 131 ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
 132 {
 133         writel(val, chip->iobase + reg);
 134 }
 135
 136 static inline void
 137 ad1889_unmute(struct snd_ad1889 *chip)
 138 {
 139         u16 st;
 140         st = ad1889_readw(chip, AD_DS_WADA) &
 141                 ~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
 142         ad1889_writew(chip, AD_DS_WADA, st);
 143         ad1889_readw(chip, AD_DS_WADA);
 144 }
 145
 146 static inline void
 147 ad1889_mute(struct snd_ad1889 *chip)
 148 {
 149         u16 st;
 150         st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
 151         ad1889_writew(chip, AD_DS_WADA, st);
 152         ad1889_readw(chip, AD_DS_WADA);
 153 }
 154
 155 static inline void
 156 ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
 157 {
 158         ad1889_writel(chip, AD_DMA_ADCBA, address);
 159         ad1889_writel(chip, AD_DMA_ADCCA, address);
 160 }
 161
 162 static inline void
 163 ad1889_load_adc_buffer_count(struct snd_ad1889 *chip, u32 count)
 164 {
 165         ad1889_writel(chip, AD_DMA_ADCBC, count);
 166         ad1889_writel(chip, AD_DMA_ADCCC, count);
 167 }
 168
 169 static inline void
 170 ad1889_load_adc_interrupt_count(struct snd_ad1889 *chip, u32 count)
 171 {
 172         ad1889_writel(chip, AD_DMA_ADCIB, count);
 173         ad1889_writel(chip, AD_DMA_ADCIC, count);
 174 }
 175
 176 static inline void
 177 ad1889_load_wave_buffer_address(struct snd_ad1889 *chip, u32 address)
 178 {
 179         ad1889_writel(chip, AD_DMA_WAVBA, address);
 180         ad1889_writel(chip, AD_DMA_WAVCA, address);
 181 }
 182
 183 static inline void
 184 ad1889_load_wave_buffer_count(struct snd_ad1889 *chip, u32 count)
 185 {
 186         ad1889_writel(chip, AD_DMA_WAVBC, count);
 187         ad1889_writel(chip, AD_DMA_WAVCC, count);
 188 }
 189
 190 static inline void
 191 ad1889_load_wave_interrupt_count(struct snd_ad1889 *chip, u32 count)
 192 {
 193         ad1889_writel(chip, AD_DMA_WAVIB, count);
 194         ad1889_writel(chip, AD_DMA_WAVIC, count);
 195 }
 196
 197 static void
 198 ad1889_channel_reset(struct snd_ad1889 *chip, unsigned int channel)
 199 {
 200         u16 reg;
 201
 202         if (channel & AD_CHAN_WAV) {
 203                 /* Disable wave channel */
 204                 reg = ad1889_readw(chip, AD_DS_WSMC) & ~AD_DS_WSMC_WAEN;
 205                 ad1889_writew(chip, AD_DS_WSMC, reg);
 206                 chip->wave.reg = reg;
 207
 208                 /* disable IRQs */
 209                 reg = ad1889_readw(chip, AD_DMA_WAV);
 210                 reg &= AD_DMA_IM_DIS;
 211                 reg &= ~AD_DMA_LOOP;
 212                 ad1889_writew(chip, AD_DMA_WAV, reg);
 213
 214                 /* clear IRQ and address counters and pointers */
 215                 ad1889_load_wave_buffer_address(chip, 0x0);
 216                 ad1889_load_wave_buffer_count(chip, 0x0);
 217                 ad1889_load_wave_interrupt_count(chip, 0x0);
 218
 219                 /* flush */
 220                 ad1889_readw(chip, AD_DMA_WAV);
 221         }
 222
 223         if (channel & AD_CHAN_ADC) {
 224                 /* Disable ADC channel */
 225                 reg = ad1889_readw(chip, AD_DS_RAMC) & ~AD_DS_RAMC_ADEN;
 226                 ad1889_writew(chip, AD_DS_RAMC, reg);
 227                 chip->ramc.reg = reg;
 228
 229                 reg = ad1889_readw(chip, AD_DMA_ADC);
 230                 reg &= AD_DMA_IM_DIS;
 231                 reg &= ~AD_DMA_LOOP;
 232                 ad1889_writew(chip, AD_DMA_ADC, reg);
 233
 234                 ad1889_load_adc_buffer_address(chip, 0x0);
 235                 ad1889_load_adc_buffer_count(chip, 0x0);
 236                 ad1889_load_adc_interrupt_count(chip, 0x0);
 237
 238                 /* flush */
 239                 ad1889_readw(chip, AD_DMA_ADC);
 240         }
 241 }
 242
 243 static u16
 244 snd_ad1889_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
 245 {
 246         struct snd_ad1889 *chip = ac97->private_data;
 247         return ad1889_readw(chip, AD_AC97_BASE + reg);
 248 }
 249
 250 static void
 251 snd_ad1889_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
 252 {
 253         struct snd_ad1889 *chip = ac97->private_data;
 254         ad1889_writew(chip, AD_AC97_BASE + reg, val);
 255 }
 256
 257 static int
 258 snd_ad1889_ac97_ready(struct snd_ad1889 *chip)
 259 {
 260         int retry = 400; /* average needs 352 msec */
 261
 262         while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY)
 263                         && --retry)
 264                 mdelay(1);
 265         if (!retry) {
 266                 snd_printk(KERN_ERR PFX "[%s] Link is not ready.\n",
 267                        __func__);
 268                 return -EIO;
 269         }
 270         ad1889_debug("[%s] ready after %d ms\n", __func__, 400 - retry);
 271
 272         return 0;
 273 }
 274
 275 static int
 276 snd_ad1889_hw_params(struct snd_pcm_substream *substream,
 277                         struct snd_pcm_hw_params *hw_params)
 278 {
 279         return snd_pcm_lib_malloc_pages(substream,
 280                                         params_buffer_bytes(hw_params));
 281 }
 282
 283 static int
 284 snd_ad1889_hw_free(struct snd_pcm_substream *substream)
 285 {
 286         return snd_pcm_lib_free_pages(substream);
 287 }
 288
 289 static struct snd_pcm_hardware snd_ad1889_playback_hw = {
 290         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 291                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 292         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 293         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 294         .rate_min = 8000,       /* docs say 7000, but we're lazy */
 295         .rate_max = 48000,
 296         .channels_min = 1,
 297         .channels_max = 2,
 298         .buffer_bytes_max = BUFFER_BYTES_MAX,
 299         .period_bytes_min = PERIOD_BYTES_MIN,
 300         .period_bytes_max = PERIOD_BYTES_MAX,
 301         .periods_min = PERIODS_MIN,
 302         .periods_max = PERIODS_MAX,
 303         /*.fifo_size = 0,*/
 304 };
 305
 306 static struct snd_pcm_hardware snd_ad1889_capture_hw = {
 307         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 308                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 309         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 310         .rates = SNDRV_PCM_RATE_48000,
 311         .rate_min = 48000,      /* docs say we could to VSR, but we're lazy */
 312         .rate_max = 48000,
 313         .channels_min = 1,
 314         .channels_max = 2,
 315         .buffer_bytes_max = BUFFER_BYTES_MAX,
 316         .period_bytes_min = PERIOD_BYTES_MIN,
 317         .period_bytes_max = PERIOD_BYTES_MAX,
 318         .periods_min = PERIODS_MIN,
 319         .periods_max = PERIODS_MAX,
 320         /*.fifo_size = 0,*/
 321 };
 322
 323 static int
 324 snd_ad1889_playback_open(struct snd_pcm_substream *ss)
 325 {
 326         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 327         struct snd_pcm_runtime *rt = ss->runtime;
 328
 329         chip->psubs = ss;
 330         rt->hw = snd_ad1889_playback_hw;
 331
 332         return 0;
 333 }
 334
 335 static int
 336 snd_ad1889_capture_open(struct snd_pcm_substream *ss)
 337 {
 338         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 339         struct snd_pcm_runtime *rt = ss->runtime;
 340
 341         chip->csubs = ss;
 342         rt->hw = snd_ad1889_capture_hw;
 343
 344         return 0;
 345 }
 346
 347 static int
 348 snd_ad1889_playback_close(struct snd_pcm_substream *ss)
 349 {
 350         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 351         chip->psubs = NULL;
 352         return 0;
 353 }
 354
 355 static int
 356 snd_ad1889_capture_close(struct snd_pcm_substream *ss)
 357 {
 358         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 359         chip->csubs = NULL;
 360         return 0;
 361 }
 362
 363 static int
 364 snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
 365 {
 366         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 367         struct snd_pcm_runtime *rt = ss->runtime;
 368         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
 369         unsigned int count = snd_pcm_lib_period_bytes(ss);
 370         u16 reg;
 371
 372         ad1889_channel_reset(chip, AD_CHAN_WAV);
 373
 374         reg = ad1889_readw(chip, AD_DS_WSMC);
 375
 376         /* Mask out 16-bit / Stereo */
 377         reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
 378
 379         if (snd_pcm_format_width(rt->format) == 16)
 380                 reg |= AD_DS_WSMC_WA16;
 381
 382         if (rt->channels > 1)
 383                 reg |= AD_DS_WSMC_WAST;
 384
 385         /* let's make sure we don't clobber ourselves */
 386         spin_lock_irq(&chip->lock);
 387
 388         chip->wave.size = size;
 389         chip->wave.reg = reg;
 390         chip->wave.addr = rt->dma_addr;
 391
 392         ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
 393
 394         /* Set sample rates on the codec */
 395         ad1889_writew(chip, AD_DS_WAS, rt->rate);
 396
 397         /* Set up DMA */
 398         ad1889_load_wave_buffer_address(chip, chip->wave.addr);
 399         ad1889_load_wave_buffer_count(chip, size);
 400         ad1889_load_wave_interrupt_count(chip, count);
 401
 402         /* writes flush */
 403         ad1889_readw(chip, AD_DS_WSMC);
 404
 405         spin_unlock_irq(&chip->lock);
 406
 407         ad1889_debug("prepare playback: addr = 0x%x, count = %u, "
 408                         "size = %u, reg = 0x%x, rate = %u\n", chip->wave.addr,
 409                         count, size, reg, rt->rate);
 410         return 0;
 411 }
 412
 413 static int
 414 snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
 415 {
 416         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 417         struct snd_pcm_runtime *rt = ss->runtime;
 418         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
 419         unsigned int count = snd_pcm_lib_period_bytes(ss);
 420         u16 reg;
 421
 422         ad1889_channel_reset(chip, AD_CHAN_ADC);
 423
 424         reg = ad1889_readw(chip, AD_DS_RAMC);
 425
 426         /* Mask out 16-bit / Stereo */
 427         reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
 428
 429         if (snd_pcm_format_width(rt->format) == 16)
 430                 reg |= AD_DS_RAMC_AD16;
 431
 432         if (rt->channels > 1)
 433                 reg |= AD_DS_RAMC_ADST;
 434
 435         /* let's make sure we don't clobber ourselves */
 436         spin_lock_irq(&chip->lock);
 437
 438         chip->ramc.size = size;
 439         chip->ramc.reg = reg;
 440         chip->ramc.addr = rt->dma_addr;
 441
 442         ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
 443
 444         /* Set up DMA */
 445         ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
 446         ad1889_load_adc_buffer_count(chip, size);
 447         ad1889_load_adc_interrupt_count(chip, count);
 448
 449         /* writes flush */
 450         ad1889_readw(chip, AD_DS_RAMC);
 451
 452         spin_unlock_irq(&chip->lock);
 453
 454         ad1889_debug("prepare capture: addr = 0x%x, count = %u, "
 455                         "size = %u, reg = 0x%x, rate = %u\n", chip->ramc.addr,
 456                         count, size, reg, rt->rate);
 457         return 0;
 458 }
 459
 460 /* this is called in atomic context with IRQ disabled.
 461    Must be as fast as possible and not sleep.
 462    DMA should be *triggered* by this call.
 463    The WSMC "WAEN" bit triggers DMA Wave On/Off */
 464 static int
 465 snd_ad1889_playback_trigger(struct snd_pcm_substream *ss, int cmd)
 466 {
 467         u16 wsmc;
 468         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 469
 470         wsmc = ad1889_readw(chip, AD_DS_WSMC);
 471
 472         switch (cmd) {
 473         case SNDRV_PCM_TRIGGER_START:
 474                 /* enable DMA loop & interrupts */
 475                 ad1889_writew(chip, AD_DMA_WAV, AD_DMA_LOOP | AD_DMA_IM_CNT);
 476                 wsmc |= AD_DS_WSMC_WAEN;
 477                 /* 1 to clear CHSS bit */
 478                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_WAVS);
 479                 ad1889_unmute(chip);
 480                 break;
 481         case SNDRV_PCM_TRIGGER_STOP:
 482                 ad1889_mute(chip);
 483                 wsmc &= ~AD_DS_WSMC_WAEN;
 484                 break;
 485         default:
 486                 snd_BUG();
 487                 return -EINVAL;
 488         }
 489
 490         chip->wave.reg = wsmc;
 491         ad1889_writew(chip, AD_DS_WSMC, wsmc);
 492         ad1889_readw(chip, AD_DS_WSMC); /* flush */
 493
 494         /* reset the chip when STOP - will disable IRQs */
 495         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 496                 ad1889_channel_reset(chip, AD_CHAN_WAV);
 497
 498         return 0;
 499 }
 500
 501 /* this is called in atomic context with IRQ disabled.
 502    Must be as fast as possible and not sleep.
 503    DMA should be *triggered* by this call.
 504    The RAMC "ADEN" bit triggers DMA ADC On/Off */
 505 static int
 506 snd_ad1889_capture_trigger(struct snd_pcm_substream *ss, int cmd)
 507 {
 508         u16 ramc;
 509         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 510
 511         ramc = ad1889_readw(chip, AD_DS_RAMC);
 512
 513         switch (cmd) {
 514         case SNDRV_PCM_TRIGGER_START:
 515                 /* enable DMA loop & interrupts */
 516                 ad1889_writew(chip, AD_DMA_ADC, AD_DMA_LOOP | AD_DMA_IM_CNT);
 517                 ramc |= AD_DS_RAMC_ADEN;
 518                 /* 1 to clear CHSS bit */
 519                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_ADCS);
 520                 break;
 521         case SNDRV_PCM_TRIGGER_STOP:
 522                 ramc &= ~AD_DS_RAMC_ADEN;
 523                 break;
 524         default:
 525                 return -EINVAL;
 526         }
 527
 528         chip->ramc.reg = ramc;
 529         ad1889_writew(chip, AD_DS_RAMC, ramc);
 530         ad1889_readw(chip, AD_DS_RAMC); /* flush */
 531
 532         /* reset the chip when STOP - will disable IRQs */
 533         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 534                 ad1889_channel_reset(chip, AD_CHAN_ADC);
 535
 536         return 0;
 537 }
 538
 539 /* Called in atomic context with IRQ disabled */
 540 static snd_pcm_uframes_t
 541 snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
 542 {
 543         size_t ptr = 0;
 544         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 545
 546         if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
 547                 return 0;
 548
 549         ptr = ad1889_readl(chip, AD_DMA_WAVCA);
 550         ptr -= chip->wave.addr;
 551
 552         if (snd_BUG_ON(ptr >= chip->wave.size))
 553                 return 0;
 554
 555         return bytes_to_frames(ss->runtime, ptr);
 556 }
 557
 558 /* Called in atomic context with IRQ disabled */
 559 static snd_pcm_uframes_t
 560 snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
 561 {
 562         size_t ptr = 0;
 563         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 564
 565         if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
 566                 return 0;
 567
 568         ptr = ad1889_readl(chip, AD_DMA_ADCCA);
 569         ptr -= chip->ramc.addr;
 570
 571         if (snd_BUG_ON(ptr >= chip->ramc.size))
 572                 return 0;
 573
 574         return bytes_to_frames(ss->runtime, ptr);
 575 }
 576
 577 static struct snd_pcm_ops snd_ad1889_playback_ops = {
 578         .open = snd_ad1889_playback_open,
 579         .close = snd_ad1889_playback_close,
 580         .ioctl = snd_pcm_lib_ioctl,
 581         .hw_params = snd_ad1889_hw_params,
 582         .hw_free = snd_ad1889_hw_free,
 583         .prepare = snd_ad1889_playback_prepare,
 584         .trigger = snd_ad1889_playback_trigger,
 585         .pointer = snd_ad1889_playback_pointer,
 586 };
 587
 588 static struct snd_pcm_ops snd_ad1889_capture_ops = {
 589         .open = snd_ad1889_capture_open,
 590         .close = snd_ad1889_capture_close,
 591         .ioctl = snd_pcm_lib_ioctl,
 592         .hw_params = snd_ad1889_hw_params,
 593         .hw_free = snd_ad1889_hw_free,
 594         .prepare = snd_ad1889_capture_prepare,
 595         .trigger = snd_ad1889_capture_trigger,
 596         .pointer = snd_ad1889_capture_pointer,
 597 };
 598
 599 static irqreturn_t
 600 snd_ad1889_interrupt(int irq, void *dev_id)
 601 {
 602         unsigned long st;
 603         struct snd_ad1889 *chip = dev_id;
 604
 605         st = ad1889_readl(chip, AD_DMA_DISR);
 606
 607         /* clear ISR */
 608         ad1889_writel(chip, AD_DMA_DISR, st);
 609
 610         st &= AD_INTR_MASK;
 611
 612         if (unlikely(!st))
 613                 return IRQ_NONE;
 614
 615         if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
 616                 ad1889_debug("Unexpected master or target abort interrupt!\n");
 617
 618         if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
 619                 snd_pcm_period_elapsed(chip->psubs);
 620         if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
 621                 snd_pcm_period_elapsed(chip->csubs);
 622
 623         return IRQ_HANDLED;
 624 }
 625
 626 static int __devinit
 627 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, struct snd_pcm **rpcm)
 628 {
 629         int err;
 630         struct snd_pcm *pcm;
 631
 632         if (rpcm)
 633                 *rpcm = NULL;
 634
 635         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
 636         if (err < 0)
 637                 return err;
 638
 639         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 640                         &snd_ad1889_playback_ops);
 641         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 642                         &snd_ad1889_capture_ops);
 643
 644         pcm->private_data = chip;
 645         pcm->info_flags = 0;
 646         strcpy(pcm->name, chip->card->shortname);
 647
 648         chip->pcm = pcm;
 649         chip->psubs = NULL;
 650         chip->csubs = NULL;
 651
 652         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 653                                                 snd_dma_pci_data(chip->pci),
 654                                                 BUFFER_BYTES_MAX / 2,
 655                                                 BUFFER_BYTES_MAX);
 656
 657         if (err < 0) {
 658                 snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
 659                 return err;
 660         }
 661
 662         if (rpcm)
 663                 *rpcm = pcm;
 664
 665         return 0;
 666 }
 667
 668 static void
 669 snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 670 {
 671         struct snd_ad1889 *chip = entry->private_data;
 672         u16 reg;
 673         int tmp;
 674
 675         reg = ad1889_readw(chip, AD_DS_WSMC);
 676         snd_iprintf(buffer, "Wave output: %s\n",
 677                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
 678         snd_iprintf(buffer, "Wave Channels: %s\n",
 679                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 680         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
 681                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
 682
 683         /* WARQ is at offset 12 */
 684         tmp = (reg & AD_DS_WSMC_WARQ) ?
 685                         (((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
 686         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 687
 688         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
 689                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 690
 691
 692         snd_iprintf(buffer, "Synthesis output: %s\n",
 693                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
 694
 695         /* SYRQ is at offset 4 */
 696         tmp = (reg & AD_DS_WSMC_SYRQ) ?
 697                         (((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
 698         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 699
 700         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
 701                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 702
 703         reg = ad1889_readw(chip, AD_DS_RAMC);
 704         snd_iprintf(buffer, "ADC input: %s\n",
 705                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
 706         snd_iprintf(buffer, "ADC Channels: %s\n",
 707                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 708         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
 709                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
 710
 711         /* ACRQ is at offset 4 */
 712         tmp = (reg & AD_DS_RAMC_ACRQ) ?
 713                         (((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
 714         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 715
 716         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
 717                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 718
 719         snd_iprintf(buffer, "Resampler input: %s\n",
 720                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
 721
 722         /* RERQ is at offset 12 */
 723         tmp = (reg & AD_DS_RAMC_RERQ) ?
 724                         (((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
 725         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 726
 727         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
 728                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 729
 730
 731         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
 732         suggests that LSB is -3dB, which is more coherent with the logarithmic
 733         nature of the dB scale */
 734         reg = ad1889_readw(chip, AD_DS_WADA);
 735         snd_iprintf(buffer, "Left: %s, -%d dB\n",
 736                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
 737                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
 738         reg = ad1889_readw(chip, AD_DS_WADA);
 739         snd_iprintf(buffer, "Right: %s, -%d dB\n",
 740                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
 741                         ((reg & AD_DS_WADA_RWAA) >> 8) * 3);
 742
 743         reg = ad1889_readw(chip, AD_DS_WAS);
 744         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
 745         reg = ad1889_readw(chip, AD_DS_RES);
 746         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
 747 }
 748
 749 static void __devinit
 750 snd_ad1889_proc_init(struct snd_ad1889 *chip)
 751 {
 752         struct snd_info_entry *entry;
 753
 754         if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
 755                 snd_info_set_text_ops(entry, chip, snd_ad1889_proc_read);
 756 }
 757
 758 static struct ac97_quirk ac97_quirks[] = {
 759         {
 760                 .subvendor = 0x11d4,    /* AD */
 761                 .subdevice = 0x1889,    /* AD1889 */
 762                 .codec_id = AC97_ID_AD1819,
 763                 .name = "AD1889",
 764                 .type = AC97_TUNE_HP_ONLY
 765         },
 766         { } /* terminator */
 767 };
 768
 769 static void __devinit
 770 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
 771 {
 772         u16 reg;
 773
 774         reg = ad1889_readw(chip, AD_AC97_ACIC);
 775         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
 776         ad1889_writew(chip, AD_AC97_ACIC, reg);
 777         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
 778         udelay(10);
 779         /* Interface Enable */
 780         reg |= AD_AC97_ACIC_ACIE;
 781         ad1889_writew(chip, AD_AC97_ACIC, reg);
 782
 783         snd_ad1889_ac97_ready(chip);
 784
 785         /* Audio Stream Output | Variable Sample Rate Mode */
 786         reg = ad1889_readw(chip, AD_AC97_ACIC);
 787         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
 788         ad1889_writew(chip, AD_AC97_ACIC, reg);
 789         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
 790
 791 }
 792
 793 static void
 794 snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
 795 {
 796         struct snd_ad1889 *chip = bus->private_data;
 797         chip->ac97_bus = NULL;
 798 }
 799
 800 static void
 801 snd_ad1889_ac97_free(struct snd_ac97 *ac97)
 802 {
 803         struct snd_ad1889 *chip = ac97->private_data;
 804         chip->ac97 = NULL;
 805 }
 806
 807 static int __devinit
 808 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
 809 {
 810         int err;
 811         struct snd_ac97_template ac97;
 812         static struct snd_ac97_bus_ops ops = {
 813                 .write = snd_ad1889_ac97_write,
 814                 .read = snd_ad1889_ac97_read,
 815         };
 816
 817         /* doing that here, it works. */
 818         snd_ad1889_ac97_xinit(chip);
 819
 820         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
 821         if (err < 0)
 822                 return err;
 823
 824         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
 825
 826         memset(&ac97, 0, sizeof(ac97));
 827         ac97.private_data = chip;
 828         ac97.private_free = snd_ad1889_ac97_free;
 829         ac97.pci = chip->pci;
 830
 831         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
 832         if (err < 0)
 833                 return err;
 834
 835         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
 836
 837         return 0;
 838 }
 839
 840 static int
 841 snd_ad1889_free(struct snd_ad1889 *chip)
 842 {
 843         if (chip->irq < 0)
 844                 goto skip_hw;
 845
 846         spin_lock_irq(&chip->lock);
 847
 848         ad1889_mute(chip);
 849
 850         /* Turn off interrupt on count and zero DMA registers */
 851         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
 852
 853         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
 854         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
 855         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
 856
 857         spin_unlock_irq(&chip->lock);
 858
 859         if (chip->irq >= 0)
 860                 free_irq(chip->irq, chip);
 861
 862 skip_hw:
 863         if (chip->iobase)
 864                 iounmap(chip->iobase);
 865
 866         pci_release_regions(chip->pci);
 867         pci_disable_device(chip->pci);
 868
 869         kfree(chip);
 870         return 0;
 871 }
 872
 873 static int
 874 snd_ad1889_dev_free(struct snd_device *device)
 875 {
 876         struct snd_ad1889 *chip = device->device_data;
 877         return snd_ad1889_free(chip);
 878 }
 879
 880 static int __devinit
 881 snd_ad1889_init(struct snd_ad1889 *chip)
 882 {
 883         ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
 884         ad1889_readw(chip, AD_DS_CCS);  /* flush posted write */
 885
 886         mdelay(10);
 887
 888         /* enable Master and Target abort interrupts */
 889         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
 890
 891         return 0;
 892 }
 893
 894 static int __devinit
 895 snd_ad1889_create(struct snd_card *card,
 896                   struct pci_dev *pci,
 897                   struct snd_ad1889 **rchip)
 898 {
 899         int err;
 900
 901         struct snd_ad1889 *chip;
 902         static struct snd_device_ops ops = {
 903                 .dev_free = snd_ad1889_dev_free,
 904         };
 905
 906         *rchip = NULL;
 907
 908         if ((err = pci_enable_device(pci)) < 0)
 909                 return err;
 910
 911         /* check PCI availability (32bit DMA) */
 912         if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 ||
 913             pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) {
 914                 printk(KERN_ERR PFX "error setting 32-bit DMA mask.\n");
 915                 pci_disable_device(pci);
 916                 return -ENXIO;
 917         }
 918
 919         /* allocate chip specific data with zero-filled memory */
 920         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
 921                 pci_disable_device(pci);
 922                 return -ENOMEM;
 923         }
 924
 925         chip->card = card;
 926         card->private_data = chip;
 927         chip->pci = pci;
 928         chip->irq = -1;
 929
 930         /* (1) PCI resource allocation */
 931         if ((err = pci_request_regions(pci, card->driver)) < 0)
 932                 goto free_and_ret;
 933
 934         chip->bar = pci_resource_start(pci, 0);
 935         chip->iobase = pci_ioremap_bar(pci, 0);
 936         if (chip->iobase == NULL) {
 937                 printk(KERN_ERR PFX "unable to reserve region.\n");
 938                 err = -EBUSY;
 939                 goto free_and_ret;
 940         }
 941
 942         pci_set_master(pci);
 943
 944         spin_lock_init(&chip->lock);    /* only now can we call ad1889_free */
 945
 946         if (request_irq(pci->irq, snd_ad1889_interrupt,
 947                         IRQF_SHARED, card->driver, chip)) {
 948                 printk(KERN_ERR PFX "cannot obtain IRQ %d\n", pci->irq);
 949                 snd_ad1889_free(chip);
 950                 return -EBUSY;
 951         }
 952
 953         chip->irq = pci->irq;
 954         synchronize_irq(chip->irq);
 955
 956         /* (2) initialization of the chip hardware */
 957         if ((err = snd_ad1889_init(chip)) < 0) {
 958                 snd_ad1889_free(chip);
 959                 return err;
 960         }
 961
 962         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 963                 snd_ad1889_free(chip);
 964                 return err;
 965         }
 966
 967         snd_card_set_dev(card, &pci->dev);
 968
 969         *rchip = chip;
 970
 971         return 0;
 972
 973 free_and_ret:
 974         kfree(chip);
 975         pci_disable_device(pci);
 976
 977         return err;
 978 }
 979
 980 static int __devinit
 981 snd_ad1889_probe(struct pci_dev *pci,
 982                  const struct pci_device_id *pci_id)
 983 {
 984         int err;
 985         static int devno;
 986         struct snd_card *card;
 987         struct snd_ad1889 *chip;
 988
 989         /* (1) */
 990         if (devno >= SNDRV_CARDS)
 991                 return -ENODEV;
 992         if (!enable[devno]) {
 993                 devno++;
 994                 return -ENOENT;
 995         }
 996
 997         /* (2) */
 998         err = snd_card_create(index[devno], id[devno], THIS_MODULE, 0, &card);
 999         /* XXX REVISIT: we can probably allocate chip in this call */
1000         if (err < 0)
1001                 return err;
1002
1003         strcpy(card->driver, "AD1889");
1004         strcpy(card->shortname, "Analog Devices AD1889");
1005
1006         /* (3) */
1007         err = snd_ad1889_create(card, pci, &chip);
1008         if (err < 0)
1009                 goto free_and_ret;
1010
1011         /* (4) */
1012         sprintf(card->longname, "%s at 0x%lx irq %i",
1013                 card->shortname, chip->bar, chip->irq);
1014
1015         /* (5) */
1016         /* register AC97 mixer */
1017         err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
1018         if (err < 0)
1019                 goto free_and_ret;
1020
1021         err = snd_ad1889_pcm_init(chip, 0, NULL);
1022         if (err < 0)
1023                 goto free_and_ret;
1024
1025         /* register proc interface */
1026         snd_ad1889_proc_init(chip);
1027
1028         /* (6) */
1029         err = snd_card_register(card);
1030         if (err < 0)
1031                 goto free_and_ret;
1032
1033         /* (7) */
1034         pci_set_drvdata(pci, card);
1035
1036         devno++;
1037         return 0;
1038
1039 free_and_ret:
1040         snd_card_free(card);
1041         return err;
1042 }
1043
1044 static void __devexit
1045 snd_ad1889_remove(struct pci_dev *pci)
1046 {
1047         snd_card_free(pci_get_drvdata(pci));
1048         pci_set_drvdata(pci, NULL);
1049 }
1050
1051 static DEFINE_PCI_DEVICE_TABLE(snd_ad1889_ids) = {
1052         { PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
1053         { 0, },
1054 };
1055 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
1056
1057 static struct pci_driver ad1889_pci_driver = {
1058         .name = "AD1889 Audio",
1059         .id_table = snd_ad1889_ids,
1060         .probe = snd_ad1889_probe,
1061         .remove = __devexit_p(snd_ad1889_remove),
1062 };
1063
1064 static int __init
1065 alsa_ad1889_init(void)
1066 {
1067         return pci_register_driver(&ad1889_pci_driver);
1068 }
1069
1070 static void __exit
1071 alsa_ad1889_fini(void)
1072 {
1073         pci_unregister_driver(&ad1889_pci_driver);
1074 }
1075
1076 module_init(alsa_ad1889_init);
1077 module_exit(alsa_ad1889_fini);