sound/pci/ad1889.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
ad1889_readw
ad1889_writew
ad1889_readl
ad1889_writel
ad1889_unmute
ad1889_mute
ad1889_load_adc_buffer_address
ad1889_load_adc_buffer_count
ad1889_load_adc_interrupt_count
ad1889_load_wave_buffer_address
ad1889_load_wave_buffer_count
ad1889_load_wave_interrupt_count
ad1889_channel_reset
snd_ad1889_ac97_read
snd_ad1889_ac97_write
snd_ad1889_ac97_ready
snd_ad1889_hw_params
snd_ad1889_hw_free
snd_ad1889_playback_open
snd_ad1889_capture_open
snd_ad1889_playback_close
snd_ad1889_capture_close
snd_ad1889_playback_prepare
snd_ad1889_capture_prepare
snd_ad1889_playback_trigger
snd_ad1889_capture_trigger
snd_ad1889_playback_pointer
snd_ad1889_capture_pointer
snd_ad1889_interrupt
snd_ad1889_pcm_init
snd_ad1889_proc_read
snd_ad1889_proc_init
snd_ad1889_ac97_xinit
snd_ad1889_ac97_bus_free
snd_ad1889_ac97_free
snd_ad1889_ac97_init
snd_ad1889_free
snd_ad1889_dev_free
snd_ad1889_init
snd_ad1889_create
snd_ad1889_probe
snd_ad1889_remove
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Analog Devices 1889 audio driver
   3  *
   4  * This is a driver for the AD1889 PCI audio chipset found
   5  * on the HP PA-RISC [BCJ]-xxx0 workstations.
   6  *
   7  * Copyright (C) 2004-2005, Kyle McMartin <kyle@parisc-linux.org>
   8  * Copyright (C) 2005, Thibaut Varene <varenet@parisc-linux.org>
   9  *   Based on the OSS AD1889 driver by Randolph Chung <tausq@debian.org>
  10  *
  11  * TODO:
  12  *      Do we need to take care of CCS register?
  13  *      Maybe we could use finer grained locking (separate locks for pb/cap)?
  14  * Wishlist:
  15  *      Control Interface (mixer) support
  16  *      Better AC97 support (VSR...)?
  17  *      PM support
  18  *      MIDI support
  19  *      Game Port support
  20  *      SG DMA support (this will need *a lot* of work)
  21  */
  22 
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/slab.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/compiler.h>
  29 #include <linux/delay.h>
  30 #include <linux/module.h>
  31 #include <linux/io.h>
  32 
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/initval.h>
  36 #include <sound/ac97_codec.h>
  37 
  38 #include "ad1889.h"
  39 #include "ac97/ac97_id.h"
  40 
  41 #define AD1889_DRVVER   "Version: 1.7"
  42 
  43 MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
  44 MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
  45 MODULE_LICENSE("GPL");
  46 MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");
  47 
  48 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  49 module_param_array(index, int, NULL, 0444);
  50 MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");
  51 
  52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  53 module_param_array(id, charp, NULL, 0444);
  54 MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");
  55 
  56 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  57 module_param_array(enable, bool, NULL, 0444);
  58 MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");
  59 
  60 static char *ac97_quirk[SNDRV_CARDS];
  61 module_param_array(ac97_quirk, charp, NULL, 0444);
  62 MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
  63 
  64 #define DEVNAME "ad1889"
  65 #define PFX     DEVNAME ": "
  66 
  67 /* keep track of some hw registers */
  68 struct ad1889_register_state {
  69         u16 reg;        /* reg setup */
  70         u32 addr;       /* dma base address */
  71         unsigned long size;     /* DMA buffer size */
  72 };
  73 
  74 struct snd_ad1889 {
  75         struct snd_card *card;
  76         struct pci_dev *pci;
  77 
  78         int irq;
  79         unsigned long bar;
  80         void __iomem *iobase;
  81 
  82         struct snd_ac97 *ac97;
  83         struct snd_ac97_bus *ac97_bus;
  84         struct snd_pcm *pcm;
  85         struct snd_info_entry *proc;
  86 
  87         struct snd_pcm_substream *psubs;
  88         struct snd_pcm_substream *csubs;
  89 
  90         /* playback register state */
  91         struct ad1889_register_state wave;
  92         struct ad1889_register_state ramc;
  93 
  94         spinlock_t lock;
  95 };
  96 
  97 static inline u16
  98 ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
  99 {
 100         return readw(chip->iobase + reg);
 101 }
 102 
 103 static inline void
 104 ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
 105 {
 106         writew(val, chip->iobase + reg);
 107 }
 108 
 109 static inline u32
 110 ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
 111 {
 112         return readl(chip->iobase + reg);
 113 }
 114 
 115 static inline void
 116 ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
 117 {
 118         writel(val, chip->iobase + reg);
 119 }
 120 
 121 static inline void
 122 ad1889_unmute(struct snd_ad1889 *chip)
 123 {
 124         u16 st;
 125         st = ad1889_readw(chip, AD_DS_WADA) & 
 126                 ~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
 127         ad1889_writew(chip, AD_DS_WADA, st);
 128         ad1889_readw(chip, AD_DS_WADA);
 129 }
 130 
 131 static inline void
 132 ad1889_mute(struct snd_ad1889 *chip)
 133 {
 134         u16 st;
 135         st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
 136         ad1889_writew(chip, AD_DS_WADA, st);
 137         ad1889_readw(chip, AD_DS_WADA);
 138 }
 139 
 140 static inline void
 141 ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
 142 {
 143         ad1889_writel(chip, AD_DMA_ADCBA, address);
 144         ad1889_writel(chip, AD_DMA_ADCCA, address);
 145 }
 146 
 147 static inline void
 148 ad1889_load_adc_buffer_count(struct snd_ad1889 *chip, u32 count)
 149 {
 150         ad1889_writel(chip, AD_DMA_ADCBC, count);
 151         ad1889_writel(chip, AD_DMA_ADCCC, count);
 152 }
 153 
 154 static inline void
 155 ad1889_load_adc_interrupt_count(struct snd_ad1889 *chip, u32 count)
 156 {
 157         ad1889_writel(chip, AD_DMA_ADCIB, count);
 158         ad1889_writel(chip, AD_DMA_ADCIC, count);
 159 }
 160 
 161 static inline void
 162 ad1889_load_wave_buffer_address(struct snd_ad1889 *chip, u32 address)
 163 {
 164         ad1889_writel(chip, AD_DMA_WAVBA, address);
 165         ad1889_writel(chip, AD_DMA_WAVCA, address);
 166 }
 167 
 168 static inline void
 169 ad1889_load_wave_buffer_count(struct snd_ad1889 *chip, u32 count)
 170 {
 171         ad1889_writel(chip, AD_DMA_WAVBC, count);
 172         ad1889_writel(chip, AD_DMA_WAVCC, count);
 173 }
 174 
 175 static inline void
 176 ad1889_load_wave_interrupt_count(struct snd_ad1889 *chip, u32 count)
 177 {
 178         ad1889_writel(chip, AD_DMA_WAVIB, count);
 179         ad1889_writel(chip, AD_DMA_WAVIC, count);
 180 }
 181 
 182 static void
 183 ad1889_channel_reset(struct snd_ad1889 *chip, unsigned int channel)
 184 {
 185         u16 reg;
 186         
 187         if (channel & AD_CHAN_WAV) {
 188                 /* Disable wave channel */
 189                 reg = ad1889_readw(chip, AD_DS_WSMC) & ~AD_DS_WSMC_WAEN;
 190                 ad1889_writew(chip, AD_DS_WSMC, reg);
 191                 chip->wave.reg = reg;
 192                 
 193                 /* disable IRQs */
 194                 reg = ad1889_readw(chip, AD_DMA_WAV);
 195                 reg &= AD_DMA_IM_DIS;
 196                 reg &= ~AD_DMA_LOOP;
 197                 ad1889_writew(chip, AD_DMA_WAV, reg);
 198 
 199                 /* clear IRQ and address counters and pointers */
 200                 ad1889_load_wave_buffer_address(chip, 0x0);
 201                 ad1889_load_wave_buffer_count(chip, 0x0);
 202                 ad1889_load_wave_interrupt_count(chip, 0x0);
 203 
 204                 /* flush */
 205                 ad1889_readw(chip, AD_DMA_WAV);
 206         }
 207         
 208         if (channel & AD_CHAN_ADC) {
 209                 /* Disable ADC channel */
 210                 reg = ad1889_readw(chip, AD_DS_RAMC) & ~AD_DS_RAMC_ADEN;
 211                 ad1889_writew(chip, AD_DS_RAMC, reg);
 212                 chip->ramc.reg = reg;
 213 
 214                 reg = ad1889_readw(chip, AD_DMA_ADC);
 215                 reg &= AD_DMA_IM_DIS;
 216                 reg &= ~AD_DMA_LOOP;
 217                 ad1889_writew(chip, AD_DMA_ADC, reg);
 218         
 219                 ad1889_load_adc_buffer_address(chip, 0x0);
 220                 ad1889_load_adc_buffer_count(chip, 0x0);
 221                 ad1889_load_adc_interrupt_count(chip, 0x0);
 222 
 223                 /* flush */
 224                 ad1889_readw(chip, AD_DMA_ADC);
 225         }
 226 }
 227 
 228 static u16
 229 snd_ad1889_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
 230 {
 231         struct snd_ad1889 *chip = ac97->private_data;
 232         return ad1889_readw(chip, AD_AC97_BASE + reg);
 233 }
 234 
 235 static void
 236 snd_ad1889_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
 237 {
 238         struct snd_ad1889 *chip = ac97->private_data;
 239         ad1889_writew(chip, AD_AC97_BASE + reg, val);
 240 }
 241 
 242 static int
 243 snd_ad1889_ac97_ready(struct snd_ad1889 *chip)
 244 {
 245         int retry = 400; /* average needs 352 msec */
 246         
 247         while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY) 
 248                         && --retry)
 249                 usleep_range(1000, 2000);
 250         if (!retry) {
 251                 dev_err(chip->card->dev, "[%s] Link is not ready.\n",
 252                         __func__);
 253                 return -EIO;
 254         }
 255         dev_dbg(chip->card->dev, "[%s] ready after %d ms\n", __func__, 400 - retry);
 256 
 257         return 0;
 258 }
 259 
 260 static int 
 261 snd_ad1889_hw_params(struct snd_pcm_substream *substream,
 262                         struct snd_pcm_hw_params *hw_params)
 263 {
 264         return snd_pcm_lib_malloc_pages(substream, 
 265                                         params_buffer_bytes(hw_params));
 266 }
 267 
 268 static int
 269 snd_ad1889_hw_free(struct snd_pcm_substream *substream)
 270 {
 271         return snd_pcm_lib_free_pages(substream);
 272 }
 273 
 274 static const struct snd_pcm_hardware snd_ad1889_playback_hw = {
 275         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 276                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 277         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 278         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 279         .rate_min = 8000,       /* docs say 7000, but we're lazy */
 280         .rate_max = 48000,
 281         .channels_min = 1,
 282         .channels_max = 2,
 283         .buffer_bytes_max = BUFFER_BYTES_MAX,
 284         .period_bytes_min = PERIOD_BYTES_MIN,
 285         .period_bytes_max = PERIOD_BYTES_MAX,
 286         .periods_min = PERIODS_MIN,
 287         .periods_max = PERIODS_MAX,
 288         /*.fifo_size = 0,*/
 289 };
 290 
 291 static const struct snd_pcm_hardware snd_ad1889_capture_hw = {
 292         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 293                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 294         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 295         .rates = SNDRV_PCM_RATE_48000,
 296         .rate_min = 48000,      /* docs say we could to VSR, but we're lazy */
 297         .rate_max = 48000,
 298         .channels_min = 1,
 299         .channels_max = 2,
 300         .buffer_bytes_max = BUFFER_BYTES_MAX,
 301         .period_bytes_min = PERIOD_BYTES_MIN,
 302         .period_bytes_max = PERIOD_BYTES_MAX,
 303         .periods_min = PERIODS_MIN,
 304         .periods_max = PERIODS_MAX,
 305         /*.fifo_size = 0,*/
 306 };
 307 
 308 static int
 309 snd_ad1889_playback_open(struct snd_pcm_substream *ss)
 310 {
 311         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 312         struct snd_pcm_runtime *rt = ss->runtime;
 313 
 314         chip->psubs = ss;
 315         rt->hw = snd_ad1889_playback_hw;
 316 
 317         return 0;
 318 }
 319 
 320 static int
 321 snd_ad1889_capture_open(struct snd_pcm_substream *ss)
 322 {
 323         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 324         struct snd_pcm_runtime *rt = ss->runtime;
 325 
 326         chip->csubs = ss;
 327         rt->hw = snd_ad1889_capture_hw;
 328 
 329         return 0;
 330 }
 331 
 332 static int
 333 snd_ad1889_playback_close(struct snd_pcm_substream *ss)
 334 {
 335         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 336         chip->psubs = NULL;
 337         return 0;
 338 }
 339 
 340 static int
 341 snd_ad1889_capture_close(struct snd_pcm_substream *ss)
 342 {
 343         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 344         chip->csubs = NULL;
 345         return 0;
 346 }
 347 
 348 static int
 349 snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
 350 {
 351         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 352         struct snd_pcm_runtime *rt = ss->runtime;
 353         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
 354         unsigned int count = snd_pcm_lib_period_bytes(ss);
 355         u16 reg;
 356 
 357         ad1889_channel_reset(chip, AD_CHAN_WAV);
 358 
 359         reg = ad1889_readw(chip, AD_DS_WSMC);
 360         
 361         /* Mask out 16-bit / Stereo */
 362         reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
 363 
 364         if (snd_pcm_format_width(rt->format) == 16)
 365                 reg |= AD_DS_WSMC_WA16;
 366 
 367         if (rt->channels > 1)
 368                 reg |= AD_DS_WSMC_WAST;
 369 
 370         /* let's make sure we don't clobber ourselves */
 371         spin_lock_irq(&chip->lock);
 372         
 373         chip->wave.size = size;
 374         chip->wave.reg = reg;
 375         chip->wave.addr = rt->dma_addr;
 376 
 377         ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
 378         
 379         /* Set sample rates on the codec */
 380         ad1889_writew(chip, AD_DS_WAS, rt->rate);
 381 
 382         /* Set up DMA */
 383         ad1889_load_wave_buffer_address(chip, chip->wave.addr);
 384         ad1889_load_wave_buffer_count(chip, size);
 385         ad1889_load_wave_interrupt_count(chip, count);
 386 
 387         /* writes flush */
 388         ad1889_readw(chip, AD_DS_WSMC);
 389         
 390         spin_unlock_irq(&chip->lock);
 391         
 392         dev_dbg(chip->card->dev,
 393                 "prepare playback: addr = 0x%x, count = %u, size = %u, reg = 0x%x, rate = %u\n",
 394                 chip->wave.addr, count, size, reg, rt->rate);
 395         return 0;
 396 }
 397 
 398 static int
 399 snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
 400 {
 401         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 402         struct snd_pcm_runtime *rt = ss->runtime;
 403         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
 404         unsigned int count = snd_pcm_lib_period_bytes(ss);
 405         u16 reg;
 406 
 407         ad1889_channel_reset(chip, AD_CHAN_ADC);
 408         
 409         reg = ad1889_readw(chip, AD_DS_RAMC);
 410 
 411         /* Mask out 16-bit / Stereo */
 412         reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
 413 
 414         if (snd_pcm_format_width(rt->format) == 16)
 415                 reg |= AD_DS_RAMC_AD16;
 416 
 417         if (rt->channels > 1)
 418                 reg |= AD_DS_RAMC_ADST;
 419 
 420         /* let's make sure we don't clobber ourselves */
 421         spin_lock_irq(&chip->lock);
 422         
 423         chip->ramc.size = size;
 424         chip->ramc.reg = reg;
 425         chip->ramc.addr = rt->dma_addr;
 426 
 427         ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
 428 
 429         /* Set up DMA */
 430         ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
 431         ad1889_load_adc_buffer_count(chip, size);
 432         ad1889_load_adc_interrupt_count(chip, count);
 433 
 434         /* writes flush */
 435         ad1889_readw(chip, AD_DS_RAMC);
 436         
 437         spin_unlock_irq(&chip->lock);
 438         
 439         dev_dbg(chip->card->dev,
 440                 "prepare capture: addr = 0x%x, count = %u, size = %u, reg = 0x%x, rate = %u\n",
 441                 chip->ramc.addr, count, size, reg, rt->rate);
 442         return 0;
 443 }
 444 
 445 /* this is called in atomic context with IRQ disabled.
 446    Must be as fast as possible and not sleep.
 447    DMA should be *triggered* by this call.
 448    The WSMC "WAEN" bit triggers DMA Wave On/Off */
 449 static int
 450 snd_ad1889_playback_trigger(struct snd_pcm_substream *ss, int cmd)
 451 {
 452         u16 wsmc;
 453         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 454         
 455         wsmc = ad1889_readw(chip, AD_DS_WSMC);
 456 
 457         switch (cmd) {
 458         case SNDRV_PCM_TRIGGER_START:
 459                 /* enable DMA loop & interrupts */
 460                 ad1889_writew(chip, AD_DMA_WAV, AD_DMA_LOOP | AD_DMA_IM_CNT);
 461                 wsmc |= AD_DS_WSMC_WAEN;
 462                 /* 1 to clear CHSS bit */
 463                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_WAVS);
 464                 ad1889_unmute(chip);
 465                 break;
 466         case SNDRV_PCM_TRIGGER_STOP:
 467                 ad1889_mute(chip);
 468                 wsmc &= ~AD_DS_WSMC_WAEN;
 469                 break;
 470         default:
 471                 snd_BUG();
 472                 return -EINVAL;
 473         }
 474         
 475         chip->wave.reg = wsmc;
 476         ad1889_writew(chip, AD_DS_WSMC, wsmc);  
 477         ad1889_readw(chip, AD_DS_WSMC); /* flush */
 478 
 479         /* reset the chip when STOP - will disable IRQs */
 480         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 481                 ad1889_channel_reset(chip, AD_CHAN_WAV);
 482 
 483         return 0;
 484 }
 485 
 486 /* this is called in atomic context with IRQ disabled.
 487    Must be as fast as possible and not sleep.
 488    DMA should be *triggered* by this call.
 489    The RAMC "ADEN" bit triggers DMA ADC On/Off */
 490 static int
 491 snd_ad1889_capture_trigger(struct snd_pcm_substream *ss, int cmd)
 492 {
 493         u16 ramc;
 494         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 495 
 496         ramc = ad1889_readw(chip, AD_DS_RAMC);
 497         
 498         switch (cmd) {
 499         case SNDRV_PCM_TRIGGER_START:
 500                 /* enable DMA loop & interrupts */
 501                 ad1889_writew(chip, AD_DMA_ADC, AD_DMA_LOOP | AD_DMA_IM_CNT);
 502                 ramc |= AD_DS_RAMC_ADEN;
 503                 /* 1 to clear CHSS bit */
 504                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_ADCS);
 505                 break;
 506         case SNDRV_PCM_TRIGGER_STOP:
 507                 ramc &= ~AD_DS_RAMC_ADEN;
 508                 break;
 509         default:
 510                 return -EINVAL;
 511         }
 512         
 513         chip->ramc.reg = ramc;
 514         ad1889_writew(chip, AD_DS_RAMC, ramc);  
 515         ad1889_readw(chip, AD_DS_RAMC); /* flush */
 516         
 517         /* reset the chip when STOP - will disable IRQs */
 518         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 519                 ad1889_channel_reset(chip, AD_CHAN_ADC);
 520                 
 521         return 0;
 522 }
 523 
 524 /* Called in atomic context with IRQ disabled */
 525 static snd_pcm_uframes_t
 526 snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
 527 {
 528         size_t ptr = 0;
 529         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 530 
 531         if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
 532                 return 0;
 533 
 534         ptr = ad1889_readl(chip, AD_DMA_WAVCA);
 535         ptr -= chip->wave.addr;
 536         
 537         if (snd_BUG_ON(ptr >= chip->wave.size))
 538                 return 0;
 539         
 540         return bytes_to_frames(ss->runtime, ptr);
 541 }
 542 
 543 /* Called in atomic context with IRQ disabled */
 544 static snd_pcm_uframes_t
 545 snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
 546 {
 547         size_t ptr = 0;
 548         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
 549 
 550         if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
 551                 return 0;
 552 
 553         ptr = ad1889_readl(chip, AD_DMA_ADCCA);
 554         ptr -= chip->ramc.addr;
 555 
 556         if (snd_BUG_ON(ptr >= chip->ramc.size))
 557                 return 0;
 558         
 559         return bytes_to_frames(ss->runtime, ptr);
 560 }
 561 
 562 static const struct snd_pcm_ops snd_ad1889_playback_ops = {
 563         .open = snd_ad1889_playback_open,
 564         .close = snd_ad1889_playback_close,
 565         .ioctl = snd_pcm_lib_ioctl,
 566         .hw_params = snd_ad1889_hw_params,
 567         .hw_free = snd_ad1889_hw_free,
 568         .prepare = snd_ad1889_playback_prepare,
 569         .trigger = snd_ad1889_playback_trigger,
 570         .pointer = snd_ad1889_playback_pointer, 
 571 };
 572 
 573 static const struct snd_pcm_ops snd_ad1889_capture_ops = {
 574         .open = snd_ad1889_capture_open,
 575         .close = snd_ad1889_capture_close,
 576         .ioctl = snd_pcm_lib_ioctl,
 577         .hw_params = snd_ad1889_hw_params,
 578         .hw_free = snd_ad1889_hw_free,
 579         .prepare = snd_ad1889_capture_prepare,
 580         .trigger = snd_ad1889_capture_trigger,
 581         .pointer = snd_ad1889_capture_pointer, 
 582 };
 583 
 584 static irqreturn_t
 585 snd_ad1889_interrupt(int irq, void *dev_id)
 586 {
 587         unsigned long st;
 588         struct snd_ad1889 *chip = dev_id;
 589 
 590         st = ad1889_readl(chip, AD_DMA_DISR);
 591 
 592         /* clear ISR */
 593         ad1889_writel(chip, AD_DMA_DISR, st);
 594 
 595         st &= AD_INTR_MASK;
 596 
 597         if (unlikely(!st))
 598                 return IRQ_NONE;
 599 
 600         if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
 601                 dev_dbg(chip->card->dev,
 602                         "Unexpected master or target abort interrupt!\n");
 603 
 604         if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
 605                 snd_pcm_period_elapsed(chip->psubs);
 606         if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
 607                 snd_pcm_period_elapsed(chip->csubs);
 608 
 609         return IRQ_HANDLED;
 610 }
 611 
 612 static int
 613 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device)
 614 {
 615         int err;
 616         struct snd_pcm *pcm;
 617 
 618         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
 619         if (err < 0)
 620                 return err;
 621 
 622         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
 623                         &snd_ad1889_playback_ops);
 624         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 625                         &snd_ad1889_capture_ops);
 626 
 627         pcm->private_data = chip;
 628         pcm->info_flags = 0;
 629         strcpy(pcm->name, chip->card->shortname);
 630         
 631         chip->pcm = pcm;
 632         chip->psubs = NULL;
 633         chip->csubs = NULL;
 634 
 635         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 636                                                 snd_dma_pci_data(chip->pci),
 637                                                 BUFFER_BYTES_MAX / 2,
 638                                                 BUFFER_BYTES_MAX);
 639 
 640         return 0;
 641 }
 642 
 643 static void
 644 snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 645 {
 646         struct snd_ad1889 *chip = entry->private_data;
 647         u16 reg;
 648         int tmp;
 649 
 650         reg = ad1889_readw(chip, AD_DS_WSMC);
 651         snd_iprintf(buffer, "Wave output: %s\n",
 652                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
 653         snd_iprintf(buffer, "Wave Channels: %s\n",
 654                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 655         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
 656                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
 657         
 658         /* WARQ is at offset 12 */
 659         tmp = (reg & AD_DS_WSMC_WARQ) ?
 660                 ((((reg & AD_DS_WSMC_WARQ) >> 12) & 0x01) ? 12 : 18) : 4;
 661         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 662         
 663         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
 664                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 665                                 
 666         
 667         snd_iprintf(buffer, "Synthesis output: %s\n",
 668                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
 669         
 670         /* SYRQ is at offset 4 */
 671         tmp = (reg & AD_DS_WSMC_SYRQ) ?
 672                 ((((reg & AD_DS_WSMC_SYRQ) >> 4) & 0x01) ? 12 : 18) : 4;
 673         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
 674         
 675         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
 676                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 677 
 678         reg = ad1889_readw(chip, AD_DS_RAMC);
 679         snd_iprintf(buffer, "ADC input: %s\n",
 680                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
 681         snd_iprintf(buffer, "ADC Channels: %s\n",
 682                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 683         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
 684                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
 685         
 686         /* ACRQ is at offset 4 */
 687         tmp = (reg & AD_DS_RAMC_ACRQ) ?
 688                 ((((reg & AD_DS_RAMC_ACRQ) >> 4) & 0x01) ? 12 : 18) : 4;
 689         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 690         
 691         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
 692                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
 693         
 694         snd_iprintf(buffer, "Resampler input: %s\n",
 695                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
 696                         
 697         /* RERQ is at offset 12 */
 698         tmp = (reg & AD_DS_RAMC_RERQ) ?
 699                 ((((reg & AD_DS_RAMC_RERQ) >> 12) & 0x01) ? 12 : 18) : 4;
 700         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
 701         
 702         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
 703                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
 704                                 
 705         
 706         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
 707         suggests that LSB is -3dB, which is more coherent with the logarithmic
 708         nature of the dB scale */
 709         reg = ad1889_readw(chip, AD_DS_WADA);
 710         snd_iprintf(buffer, "Left: %s, -%d dB\n",
 711                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
 712                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
 713         reg = ad1889_readw(chip, AD_DS_WADA);
 714         snd_iprintf(buffer, "Right: %s, -%d dB\n",
 715                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
 716                         (reg & AD_DS_WADA_RWAA) * 3);
 717         
 718         reg = ad1889_readw(chip, AD_DS_WAS);
 719         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
 720         reg = ad1889_readw(chip, AD_DS_RES);
 721         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
 722 }
 723 
 724 static void
 725 snd_ad1889_proc_init(struct snd_ad1889 *chip)
 726 {
 727         snd_card_ro_proc_new(chip->card, chip->card->driver,
 728                              chip, snd_ad1889_proc_read);
 729 }
 730 
 731 static const struct ac97_quirk ac97_quirks[] = {
 732         {
 733                 .subvendor = 0x11d4,    /* AD */
 734                 .subdevice = 0x1889,    /* AD1889 */
 735                 .codec_id = AC97_ID_AD1819,
 736                 .name = "AD1889",
 737                 .type = AC97_TUNE_HP_ONLY
 738         },
 739         { } /* terminator */
 740 };
 741 
 742 static void
 743 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
 744 {
 745         u16 reg;
 746 
 747         reg = ad1889_readw(chip, AD_AC97_ACIC);
 748         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
 749         ad1889_writew(chip, AD_AC97_ACIC, reg);
 750         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
 751         udelay(10);
 752         /* Interface Enable */
 753         reg |= AD_AC97_ACIC_ACIE;
 754         ad1889_writew(chip, AD_AC97_ACIC, reg);
 755         
 756         snd_ad1889_ac97_ready(chip);
 757 
 758         /* Audio Stream Output | Variable Sample Rate Mode */
 759         reg = ad1889_readw(chip, AD_AC97_ACIC);
 760         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
 761         ad1889_writew(chip, AD_AC97_ACIC, reg);
 762         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
 763 
 764 }
 765 
 766 static void
 767 snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
 768 {
 769         struct snd_ad1889 *chip = bus->private_data;
 770         chip->ac97_bus = NULL;
 771 }
 772 
 773 static void
 774 snd_ad1889_ac97_free(struct snd_ac97 *ac97)
 775 {
 776         struct snd_ad1889 *chip = ac97->private_data;
 777         chip->ac97 = NULL;
 778 }
 779 
 780 static int
 781 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
 782 {
 783         int err;
 784         struct snd_ac97_template ac97;
 785         static struct snd_ac97_bus_ops ops = {
 786                 .write = snd_ad1889_ac97_write,
 787                 .read = snd_ad1889_ac97_read,
 788         };
 789 
 790         /* doing that here, it works. */
 791         snd_ad1889_ac97_xinit(chip);
 792 
 793         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
 794         if (err < 0)
 795                 return err;
 796         
 797         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
 798 
 799         memset(&ac97, 0, sizeof(ac97));
 800         ac97.private_data = chip;
 801         ac97.private_free = snd_ad1889_ac97_free;
 802         ac97.pci = chip->pci;
 803 
 804         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
 805         if (err < 0)
 806                 return err;
 807                 
 808         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
 809         
 810         return 0;
 811 }
 812 
 813 static int
 814 snd_ad1889_free(struct snd_ad1889 *chip)
 815 {
 816         if (chip->irq < 0)
 817                 goto skip_hw;
 818 
 819         spin_lock_irq(&chip->lock);
 820 
 821         ad1889_mute(chip);
 822 
 823         /* Turn off interrupt on count and zero DMA registers */
 824         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
 825 
 826         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
 827         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
 828         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
 829 
 830         spin_unlock_irq(&chip->lock);
 831 
 832         if (chip->irq >= 0)
 833                 free_irq(chip->irq, chip);
 834 
 835 skip_hw:
 836         iounmap(chip->iobase);
 837         pci_release_regions(chip->pci);
 838         pci_disable_device(chip->pci);
 839         kfree(chip);
 840         return 0;
 841 }
 842 
 843 static int
 844 snd_ad1889_dev_free(struct snd_device *device) 
 845 {
 846         struct snd_ad1889 *chip = device->device_data;
 847         return snd_ad1889_free(chip);
 848 }
 849 
 850 static int
 851 snd_ad1889_init(struct snd_ad1889 *chip) 
 852 {
 853         ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
 854         ad1889_readw(chip, AD_DS_CCS);  /* flush posted write */
 855 
 856         usleep_range(10000, 11000);
 857 
 858         /* enable Master and Target abort interrupts */
 859         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
 860 
 861         return 0;
 862 }
 863 
 864 static int
 865 snd_ad1889_create(struct snd_card *card,
 866                   struct pci_dev *pci,
 867                   struct snd_ad1889 **rchip)
 868 {
 869         int err;
 870 
 871         struct snd_ad1889 *chip;
 872         static struct snd_device_ops ops = {
 873                 .dev_free = snd_ad1889_dev_free,
 874         };
 875 
 876         *rchip = NULL;
 877 
 878         if ((err = pci_enable_device(pci)) < 0)
 879                 return err;
 880 
 881         /* check PCI availability (32bit DMA) */
 882         if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 ||
 883             dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
 884                 dev_err(card->dev, "error setting 32-bit DMA mask.\n");
 885                 pci_disable_device(pci);
 886                 return -ENXIO;
 887         }
 888 
 889         /* allocate chip specific data with zero-filled memory */
 890         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
 891                 pci_disable_device(pci);
 892                 return -ENOMEM;
 893         }
 894 
 895         chip->card = card;
 896         card->private_data = chip;
 897         chip->pci = pci;
 898         chip->irq = -1;
 899 
 900         /* (1) PCI resource allocation */
 901         if ((err = pci_request_regions(pci, card->driver)) < 0)
 902                 goto free_and_ret;
 903 
 904         chip->bar = pci_resource_start(pci, 0);
 905         chip->iobase = pci_ioremap_bar(pci, 0);
 906         if (chip->iobase == NULL) {
 907                 dev_err(card->dev, "unable to reserve region.\n");
 908                 err = -EBUSY;
 909                 goto free_and_ret;
 910         }
 911         
 912         pci_set_master(pci);
 913 
 914         spin_lock_init(&chip->lock);    /* only now can we call ad1889_free */
 915 
 916         if (request_irq(pci->irq, snd_ad1889_interrupt,
 917                         IRQF_SHARED, KBUILD_MODNAME, chip)) {
 918                 dev_err(card->dev, "cannot obtain IRQ %d\n", pci->irq);
 919                 snd_ad1889_free(chip);
 920                 return -EBUSY;
 921         }
 922 
 923         chip->irq = pci->irq;
 924         synchronize_irq(chip->irq);
 925 
 926         /* (2) initialization of the chip hardware */
 927         if ((err = snd_ad1889_init(chip)) < 0) {
 928                 snd_ad1889_free(chip);
 929                 return err;
 930         }
 931 
 932         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 933                 snd_ad1889_free(chip);
 934                 return err;
 935         }
 936 
 937         *rchip = chip;
 938 
 939         return 0;
 940 
 941 free_and_ret:
 942         kfree(chip);
 943         pci_disable_device(pci);
 944 
 945         return err;
 946 }
 947 
 948 static int
 949 snd_ad1889_probe(struct pci_dev *pci,
 950                  const struct pci_device_id *pci_id)
 951 {
 952         int err;
 953         static int devno;
 954         struct snd_card *card;
 955         struct snd_ad1889 *chip;
 956 
 957         /* (1) */
 958         if (devno >= SNDRV_CARDS)
 959                 return -ENODEV;
 960         if (!enable[devno]) {
 961                 devno++;
 962                 return -ENOENT;
 963         }
 964 
 965         /* (2) */
 966         err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
 967                            0, &card);
 968         /* XXX REVISIT: we can probably allocate chip in this call */
 969         if (err < 0)
 970                 return err;
 971 
 972         strcpy(card->driver, "AD1889");
 973         strcpy(card->shortname, "Analog Devices AD1889");
 974 
 975         /* (3) */
 976         err = snd_ad1889_create(card, pci, &chip);
 977         if (err < 0)
 978                 goto free_and_ret;
 979 
 980         /* (4) */
 981         sprintf(card->longname, "%s at 0x%lx irq %i",
 982                 card->shortname, chip->bar, chip->irq);
 983 
 984         /* (5) */
 985         /* register AC97 mixer */
 986         err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
 987         if (err < 0)
 988                 goto free_and_ret;
 989         
 990         err = snd_ad1889_pcm_init(chip, 0);
 991         if (err < 0)
 992                 goto free_and_ret;
 993 
 994         /* register proc interface */
 995         snd_ad1889_proc_init(chip);
 996 
 997         /* (6) */
 998         err = snd_card_register(card);
 999         if (err < 0)
1000                 goto free_and_ret;
1001 
1002         /* (7) */
1003         pci_set_drvdata(pci, card);
1004 
1005         devno++;
1006         return 0;
1007 
1008 free_and_ret:
1009         snd_card_free(card);
1010         return err;
1011 }
1012 
1013 static void
1014 snd_ad1889_remove(struct pci_dev *pci)
1015 {
1016         snd_card_free(pci_get_drvdata(pci));
1017 }
1018 
1019 static const struct pci_device_id snd_ad1889_ids[] = {
1020         { PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
1021         { 0, },
1022 };
1023 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
1024 
1025 static struct pci_driver ad1889_pci_driver = {
1026         .name = KBUILD_MODNAME,
1027         .id_table = snd_ad1889_ids,
1028         .probe = snd_ad1889_probe,
1029         .remove = snd_ad1889_remove,
1030 };
1031 
1032 module_pci_driver(ad1889_pci_driver);
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root/sound/pci/ad1889.c

DEFINITIONS
