git.oblomov.eu Git - linux-2.6/blob - 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/slab.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/compiler.h>
  40 #include <linux/delay.h>
  41
  42 #include <sound/driver.h>
  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   "$Revision: 1.3 $"
  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         snd_card_t *card;
  91         struct pci_dev *pci;
  92
  93         int irq;
  94         unsigned long bar;
  95         void __iomem *iobase;
  96
  97         ac97_t *ac97;
  98         ac97_bus_t *ac97_bus;
  99         snd_pcm_t *pcm;
 100         snd_info_entry_t *proc;
 101
 102         snd_pcm_substream_t *psubs;
 103         snd_pcm_substream_t *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 inline u16
 244 snd_ad1889_ac97_read(ac97_t *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 inline void
 251 snd_ad1889_ac97_write(ac97_t *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                        __FUNCTION__);
 268                 return -EIO;
 269         }
 270         ad1889_debug("[%s] ready after %d ms\n", __FUNCTION__, 400 - retry);
 271
 272         return 0;
 273 }
 274
 275 static int
 276 snd_ad1889_hw_params(snd_pcm_substream_t *substream,
 277                         snd_pcm_hw_params_t *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(snd_pcm_substream_t *substream)
 285 {
 286         return snd_pcm_lib_free_pages(substream);
 287 }
 288
 289 static snd_pcm_hardware_t 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 snd_pcm_hardware_t 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(snd_pcm_substream_t *ss)
 325 {
 326         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 327         snd_pcm_runtime_t *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(snd_pcm_substream_t *ss)
 337 {
 338         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 339         snd_pcm_runtime_t *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(snd_pcm_substream_t *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(snd_pcm_substream_t *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(snd_pcm_substream_t *ss)
 365 {
 366         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 367         snd_pcm_runtime_t *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(snd_pcm_substream_t *ss)
 415 {
 416         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 417         snd_pcm_runtime_t *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(snd_pcm_substream_t *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(snd_pcm_substream_t *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(snd_pcm_substream_t *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         snd_assert((ptr >= 0) && (ptr < chip->wave.size), return 0);
 553
 554         return bytes_to_frames(ss->runtime, ptr);
 555 }
 556
 557 /* Called in atomic context with IRQ disabled */
 558 static snd_pcm_uframes_t
 559 snd_ad1889_capture_pointer(snd_pcm_substream_t *ss)
 560 {
 561         size_t ptr = 0;
 562         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 563
 564         if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
 565                 return 0;
 566
 567         ptr = ad1889_readl(chip, AD_DMA_ADCCA);
 568         ptr -= chip->ramc.addr;
 569
 570         snd_assert((ptr >= 0) && (ptr < chip->ramc.size), return 0);
 571
 572         return bytes_to_frames(ss->runtime, ptr);
 573 }
 574
 575 static snd_pcm_ops_t snd_ad1889_playback_ops = {
 576         .open = snd_ad1889_playback_open,
 577         .close = snd_ad1889_playback_close,
 578         .ioctl = snd_pcm_lib_ioctl,
 579         .hw_params = snd_ad1889_hw_params,
 580         .hw_free = snd_ad1889_hw_free,
 581         .prepare = snd_ad1889_playback_prepare,
 582         .trigger = snd_ad1889_playback_trigger,
 583         .pointer = snd_ad1889_playback_pointer,
 584 };
 585
 586 static snd_pcm_ops_t snd_ad1889_capture_ops = {
 587         .open = snd_ad1889_capture_open,
 588         .close = snd_ad1889_capture_close,
 589         .ioctl = snd_pcm_lib_ioctl,
 590         .hw_params = snd_ad1889_hw_params,
 591         .hw_free = snd_ad1889_hw_free,
 592         .prepare = snd_ad1889_capture_prepare,
 593         .trigger = snd_ad1889_capture_trigger,
 594         .pointer = snd_ad1889_capture_pointer,
 595 };
 596
 597 static irqreturn_t
 598 snd_ad1889_interrupt(int irq,
 599                      void *dev_id,
 600                      struct pt_regs *regs)
 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 void
 627 snd_ad1889_pcm_free(snd_pcm_t *pcm)
 628 {
 629         struct snd_ad1889 *chip = pcm->private_data;
 630         chip->pcm = NULL;
 631         snd_pcm_lib_preallocate_free_for_all(pcm);
 632 }
 633
 634 static int __devinit
 635 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, snd_pcm_t **rpcm)
 636 {
 637         int err;
 638         snd_pcm_t *pcm;
 639
 640         if (rpcm)
 641                 *rpcm = NULL;
 642
 643         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
 644         if (err < 0)
 645                 return err;
 646
 647         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 648                         &snd_ad1889_playback_ops);
 649         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 650                         &snd_ad1889_capture_ops);
 651
 652         pcm->private_data = chip;
 653         pcm->private_free = snd_ad1889_pcm_free;
 654         pcm->info_flags = 0;
 655         strcpy(pcm->name, chip->card->shortname);
 656
 657         chip->pcm = pcm;
 658         chip->psubs = NULL;
 659         chip->csubs = NULL;
 660
 661         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 662                                                 snd_dma_pci_data(chip->pci),
 663                                                 BUFFER_BYTES_MAX / 2,
 664                                                 BUFFER_BYTES_MAX);
 665
 666         if (err < 0) {
 667                 snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
 668                 return err;
 669         }
 670
 671         if (rpcm)
 672                 *rpcm = pcm;
 673
 674         return 0;
 675 }
 676
 677 static void
 678 snd_ad1889_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 679 {
 680         struct snd_ad1889 *chip = entry->private_data;
 681         u16 reg;
 682         int tmp;
 683
 684         reg = ad1889_readw(chip, AD_DS_WSMC);
 685         snd_iprintf(buffer, "Wave output: %s\n",
 686                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
 687         snd_iprintf(buffer, "Wave Channels: %s\n",
 688                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 689         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
 690                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
 691
 692         /* WARQ is at offset 12 */
 693         tmp = (reg & AD_DS_WSMC_WARQ) ?
 694                         (((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
 695         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 696
 697         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
 698                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 699
 700
 701         snd_iprintf(buffer, "Synthesis output: %s\n",
 702                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
 703
 704         /* SYRQ is at offset 4 */
 705         tmp = (reg & AD_DS_WSMC_SYRQ) ?
 706                         (((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
 707         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 708
 709         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
 710                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 711
 712         reg = ad1889_readw(chip, AD_DS_RAMC);
 713         snd_iprintf(buffer, "ADC input: %s\n",
 714                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
 715         snd_iprintf(buffer, "ADC Channels: %s\n",
 716                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 717         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
 718                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
 719
 720         /* ACRQ is at offset 4 */
 721         tmp = (reg & AD_DS_RAMC_ACRQ) ?
 722                         (((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
 723         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 724
 725         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
 726                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 727
 728         snd_iprintf(buffer, "Resampler input: %s\n",
 729                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
 730
 731         /* RERQ is at offset 12 */
 732         tmp = (reg & AD_DS_RAMC_RERQ) ?
 733                         (((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
 734         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 735
 736         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
 737                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 738
 739
 740         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
 741         suggests that LSB is -3dB, which is more coherent with the logarithmic
 742         nature of the dB scale */
 743         reg = ad1889_readw(chip, AD_DS_WADA);
 744         snd_iprintf(buffer, "Left: %s, -%d dB\n",
 745                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
 746                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
 747         reg = ad1889_readw(chip, AD_DS_WADA);
 748         snd_iprintf(buffer, "Right: %s, -%d dB\n",
 749                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
 750                         ((reg & AD_DS_WADA_RWAA) >> 8) * 3);
 751
 752         reg = ad1889_readw(chip, AD_DS_WAS);
 753         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
 754         reg = ad1889_readw(chip, AD_DS_RES);
 755         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
 756 }
 757
 758 static void __devinit
 759 snd_ad1889_proc_init(struct snd_ad1889 *chip)
 760 {
 761         snd_info_entry_t *entry;
 762
 763         if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
 764                 snd_info_set_text_ops(entry, chip, 1024, snd_ad1889_proc_read);
 765 }
 766
 767 static struct ac97_quirk ac97_quirks[] = {
 768         {
 769                 .subvendor = 0x11d4,    /* AD */
 770                 .subdevice = 0x1889,    /* AD1889 */
 771                 .codec_id = AC97_ID_AD1819,
 772                 .name = "AD1889",
 773                 .type = AC97_TUNE_HP_ONLY
 774         },
 775         { } /* terminator */
 776 };
 777
 778 static void __devinit
 779 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
 780 {
 781         u16 reg;
 782
 783         reg = ad1889_readw(chip, AD_AC97_ACIC);
 784         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
 785         ad1889_writew(chip, AD_AC97_ACIC, reg);
 786         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
 787         udelay(10);
 788         /* Interface Enable */
 789         reg |= AD_AC97_ACIC_ACIE;
 790         ad1889_writew(chip, AD_AC97_ACIC, reg);
 791
 792         snd_ad1889_ac97_ready(chip);
 793
 794         /* Audio Stream Output | Variable Sample Rate Mode */
 795         reg = ad1889_readw(chip, AD_AC97_ACIC);
 796         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
 797         ad1889_writew(chip, AD_AC97_ACIC, reg);
 798         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
 799
 800 }
 801
 802 static void
 803 snd_ad1889_ac97_bus_free(ac97_bus_t *bus)
 804 {
 805         struct snd_ad1889 *chip = bus->private_data;
 806         chip->ac97_bus = NULL;
 807 }
 808
 809 static void
 810 snd_ad1889_ac97_free(ac97_t *ac97)
 811 {
 812         struct snd_ad1889 *chip = ac97->private_data;
 813         chip->ac97 = NULL;
 814 }
 815
 816 static int __devinit
 817 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
 818 {
 819         int err;
 820         ac97_template_t ac97;
 821         static ac97_bus_ops_t ops = {
 822                 .write = snd_ad1889_ac97_write,
 823                 .read = snd_ad1889_ac97_read,
 824         };
 825
 826         /* doing that here, it works. */
 827         snd_ad1889_ac97_xinit(chip);
 828
 829         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
 830         if (err < 0)
 831                 return err;
 832
 833         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
 834
 835         memset(&ac97, 0, sizeof(ac97));
 836         ac97.private_data = chip;
 837         ac97.private_free = snd_ad1889_ac97_free;
 838         ac97.pci = chip->pci;
 839
 840         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
 841         if (err < 0)
 842                 return err;
 843
 844         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
 845
 846         return 0;
 847 }
 848
 849 static int
 850 snd_ad1889_free(struct snd_ad1889 *chip)
 851 {
 852         if (chip->irq < 0)
 853                 goto skip_hw;
 854
 855         spin_lock_irq(&chip->lock);
 856
 857         ad1889_mute(chip);
 858
 859         /* Turn off interrupt on count and zero DMA registers */
 860         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
 861
 862         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
 863         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
 864         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
 865
 866         spin_unlock_irq(&chip->lock);
 867
 868         synchronize_irq(chip->irq);
 869
 870         if (chip->irq >= 0)
 871                 free_irq(chip->irq, (void*)chip);
 872
 873 skip_hw:
 874         if (chip->iobase)
 875                 iounmap(chip->iobase);
 876
 877         pci_release_regions(chip->pci);
 878         pci_disable_device(chip->pci);
 879
 880         kfree(chip);
 881         return 0;
 882 }
 883
 884 static inline int
 885 snd_ad1889_dev_free(snd_device_t *device)
 886 {
 887         struct snd_ad1889 *chip = device->device_data;
 888         return snd_ad1889_free(chip);
 889 }
 890
 891 static int __devinit
 892 snd_ad1889_init(struct snd_ad1889 *chip)
 893 {
 894         ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
 895         ad1889_readw(chip, AD_DS_CCS);  /* flush posted write */
 896
 897         mdelay(10);
 898
 899         /* enable Master and Target abort interrupts */
 900         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
 901
 902         return 0;
 903 }
 904
 905 static int __devinit
 906 snd_ad1889_create(snd_card_t *card,
 907                   struct pci_dev *pci,
 908                   struct snd_ad1889 **rchip)
 909 {
 910         int err;
 911
 912         struct snd_ad1889 *chip;
 913         static snd_device_ops_t ops = {
 914                 .dev_free = snd_ad1889_dev_free,
 915         };
 916
 917         *rchip = NULL;
 918
 919         if ((err = pci_enable_device(pci)) < 0)
 920                 return err;
 921
 922         /* check PCI availability (32bit DMA) */
 923         if (pci_set_dma_mask(pci, 0xffffffff) < 0 ||
 924             pci_set_consistent_dma_mask(pci, 0xffffffff) < 0) {
 925                 printk(KERN_ERR PFX "error setting 32-bit DMA mask.\n");
 926                 pci_disable_device(pci);
 927                 return -ENXIO;
 928         }
 929
 930         /* allocate chip specific data with zero-filled memory */
 931         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
 932                 pci_disable_device(pci);
 933                 return -ENOMEM;
 934         }
 935
 936         chip->card = card;
 937         card->private_data = chip;
 938         chip->pci = pci;
 939         chip->irq = -1;
 940
 941         /* (1) PCI resource allocation */
 942         if ((err = pci_request_regions(pci, card->driver)) < 0)
 943                 goto free_and_ret;
 944
 945         chip->bar = pci_resource_start(pci, 0);
 946         chip->iobase = ioremap_nocache(chip->bar, pci_resource_len(pci, 0));
 947         if (chip->iobase == NULL) {
 948                 printk(KERN_ERR PFX "unable to reserve region.\n");
 949                 err = -EBUSY;
 950                 goto free_and_ret;
 951         }
 952
 953         pci_set_master(pci);
 954
 955         spin_lock_init(&chip->lock);    /* only now can we call ad1889_free */
 956
 957         if (request_irq(pci->irq, snd_ad1889_interrupt,
 958                         SA_INTERRUPT|SA_SHIRQ, card->driver, (void*)chip)) {
 959                 printk(KERN_ERR PFX "cannot obtain IRQ %d\n", pci->irq);
 960                 snd_ad1889_free(chip);
 961                 return -EBUSY;
 962         }
 963
 964         chip->irq = pci->irq;
 965         synchronize_irq(chip->irq);
 966
 967         /* (2) initialization of the chip hardware */
 968         if ((err = snd_ad1889_init(chip)) < 0) {
 969                 snd_ad1889_free(chip);
 970                 return err;
 971         }
 972
 973         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 974                 snd_ad1889_free(chip);
 975                 return err;
 976         }
 977
 978         snd_card_set_dev(card, &pci->dev);
 979
 980         *rchip = chip;
 981
 982         return 0;
 983
 984 free_and_ret:
 985         if (chip)
 986                 kfree(chip);
 987         pci_disable_device(pci);
 988
 989         return err;
 990 }
 991
 992 static int __devinit
 993 snd_ad1889_probe(struct pci_dev *pci,
 994                  const struct pci_device_id *pci_id)
 995 {
 996         int err;
 997         static int devno;
 998         snd_card_t *card;
 999         struct snd_ad1889 *chip;
1000
1001         /* (1) */
1002         if (devno >= SNDRV_CARDS)
1003                 return -ENODEV;
1004         if (!enable[devno]) {
1005                 devno++;
1006                 return -ENOENT;
1007         }
1008
1009         /* (2) */
1010         card = snd_card_new(index[devno], id[devno], THIS_MODULE, 0);
1011         /* XXX REVISIT: we can probably allocate chip in this call */
1012         if (card == NULL)
1013                 return -ENOMEM;
1014
1015         strcpy(card->driver, "AD1889");
1016         strcpy(card->shortname, "Analog Devices AD1889");
1017
1018         /* (3) */
1019         err = snd_ad1889_create(card, pci, &chip);
1020         if (err < 0)
1021                 goto free_and_ret;
1022
1023         /* (4) */
1024         sprintf(card->longname, "%s at 0x%lx irq %i",
1025                 card->shortname, chip->bar, chip->irq);
1026
1027         /* (5) */
1028         /* register AC97 mixer */
1029         err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
1030         if (err < 0)
1031                 goto free_and_ret;
1032
1033         err = snd_ad1889_pcm_init(chip, 0, NULL);
1034         if (err < 0)
1035                 goto free_and_ret;
1036
1037         /* register proc interface */
1038         snd_ad1889_proc_init(chip);
1039
1040         /* (6) */
1041         err = snd_card_register(card);
1042         if (err < 0)
1043                 goto free_and_ret;
1044
1045         /* (7) */
1046         pci_set_drvdata(pci, card);
1047
1048         devno++;
1049         return 0;
1050
1051 free_and_ret:
1052         snd_card_free(card);
1053         return err;
1054 }
1055
1056 static void __devexit
1057 snd_ad1889_remove(struct pci_dev *pci)
1058 {
1059         snd_card_free(pci_get_drvdata(pci));
1060         pci_set_drvdata(pci, NULL);
1061 }
1062
1063 static struct pci_device_id snd_ad1889_ids[] = {
1064         { PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
1065         { 0, },
1066 };
1067 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
1068
1069 static struct pci_driver ad1889_pci = {
1070         .name = "AD1889 Audio",
1071         .owner = THIS_MODULE,
1072         .id_table = snd_ad1889_ids,
1073         .probe = snd_ad1889_probe,
1074         .remove = __devexit_p(snd_ad1889_remove),
1075 };
1076
1077 static int __init
1078 alsa_ad1889_init(void)
1079 {
1080         return pci_register_driver(&ad1889_pci);
1081 }
1082
1083 static void __exit
1084 alsa_ad1889_fini(void)
1085 {
1086         pci_unregister_driver(&ad1889_pci);
1087 }
1088
1089 module_init(alsa_ad1889_init);
1090 module_exit(alsa_ad1889_fini);