sound/pci/als300.c

   1 /*
   2  *  als300.c - driver for Avance Logic ALS300/ALS300+ soundcards.
   3  *  Copyright (C) 2005 by Ash Willis <ashwillis@programmer.net>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  *  TODO
  20  *  4 channel playback for ALS300+
  21  *  gameport
  22  *  mpu401
  23  *  opl3
  24  *
  25  *  NOTES
  26  *  The BLOCK_COUNTER registers for the ALS300(+) return a figure related to
  27  *  the position in the current period, NOT the whole buffer. It is important
  28  *  to know which period we are in so we can calculate the correct pointer.
  29  *  This is why we always use 2 periods. We can then use a flip-flop variable
  30  *  to keep track of what period we are in.
  31  */
  32
  33 #include <linux/delay.h>
  34 #include <linux/init.h>
  35 #include <linux/module.h>
  36 #include <linux/pci.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/slab.h>
  40
  41 #include <asm/io.h>
  42
  43 #include <sound/core.h>
  44 #include <sound/control.h>
  45 #include <sound/initval.h>
  46 #include <sound/pcm.h>
  47 #include <sound/pcm_params.h>
  48 #include <sound/ac97_codec.h>
  49 #include <sound/opl3.h>
  50
  51 /* snd_als300_set_irq_flag */
  52 #define IRQ_DISABLE             0
  53 #define IRQ_ENABLE              1
  54
  55 /* I/O port layout */
  56 #define AC97_ACCESS             0x00
  57 #define AC97_READ               0x04
  58 #define AC97_STATUS             0x06
  59 #define   AC97_DATA_AVAIL               (1<<6)
  60 #define   AC97_BUSY                     (1<<7)
  61 #define ALS300_IRQ_STATUS       0x07            /* ALS300 Only */
  62 #define   IRQ_PLAYBACK                  (1<<3)
  63 #define   IRQ_CAPTURE                   (1<<2)
  64 #define GCR_DATA                0x08
  65 #define GCR_INDEX               0x0C
  66 #define ALS300P_DRAM_IRQ_STATUS 0x0D            /* ALS300+ Only */
  67 #define MPU_IRQ_STATUS          0x0E            /* ALS300 Rev. E+, ALS300+ */
  68 #define ALS300P_IRQ_STATUS      0x0F            /* ALS300+ Only */
  69
  70 /* General Control Registers */
  71 #define PLAYBACK_START          0x80
  72 #define PLAYBACK_END            0x81
  73 #define PLAYBACK_CONTROL        0x82
  74 #define   TRANSFER_START                (1<<16)
  75 #define   FIFO_PAUSE                    (1<<17)
  76 #define RECORD_START            0x83
  77 #define RECORD_END              0x84
  78 #define RECORD_CONTROL          0x85
  79 #define DRAM_WRITE_CONTROL      0x8B
  80 #define   WRITE_TRANS_START             (1<<16)
  81 #define   DRAM_MODE_2                   (1<<17)
  82 #define MISC_CONTROL            0x8C
  83 #define   IRQ_SET_BIT                   (1<<15)
  84 #define   VMUTE_NORMAL                  (1<<20)
  85 #define   MMUTE_NORMAL                  (1<<21)
  86 #define MUS_VOC_VOL             0x8E
  87 #define PLAYBACK_BLOCK_COUNTER  0x9A
  88 #define RECORD_BLOCK_COUNTER    0x9B
  89
  90 #define DEBUG_CALLS     0
  91 #define DEBUG_PLAY_REC  0
  92
  93 #if DEBUG_CALLS
  94 #define snd_als300_dbgcalls(format, args...) printk(KERN_DEBUG format, ##args)
  95 #define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)
  96 #define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)
  97 #else
  98 #define snd_als300_dbgcalls(format, args...)
  99 #define snd_als300_dbgcallenter()
 100 #define snd_als300_dbgcallleave()
 101 #endif
 102
 103 #if DEBUG_PLAY_REC
 104 #define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
 105 #else
 106 #define snd_als300_dbgplay(format, args...)
 107 #endif
 108
 109 enum {DEVICE_ALS300, DEVICE_ALS300_PLUS};
 110
 111 MODULE_AUTHOR("Ash Willis <ashwillis@programmer.net>");
 112 MODULE_DESCRIPTION("Avance Logic ALS300");
 113 MODULE_LICENSE("GPL");
 114 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS300},{Avance Logic,ALS300+}}");
 115
 116 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 117 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 118 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 119
 120 module_param_array(index, int, NULL, 0444);
 121 MODULE_PARM_DESC(index, "Index value for ALS300 sound card.");
 122 module_param_array(id, charp, NULL, 0444);
 123 MODULE_PARM_DESC(id, "ID string for ALS300 sound card.");
 124 module_param_array(enable, bool, NULL, 0444);
 125 MODULE_PARM_DESC(enable, "Enable ALS300 sound card.");
 126
 127 struct snd_als300 {
 128         unsigned long port;
 129         spinlock_t reg_lock;
 130         struct snd_card *card;
 131         struct pci_dev *pci;
 132
 133         struct snd_pcm *pcm;
 134         struct snd_pcm_substream *playback_substream;
 135         struct snd_pcm_substream *capture_substream;
 136
 137         struct snd_ac97 *ac97;
 138         struct snd_opl3 *opl3;
 139
 140         struct resource *res_port;
 141
 142         int irq;
 143
 144         int chip_type; /* ALS300 or ALS300+ */
 145
 146         char revision;
 147 };
 148
 149 struct snd_als300_substream_data {
 150         int period_flipflop;
 151         int control_register;
 152         int block_counter_register;
 153 };
 154
 155 static DEFINE_PCI_DEVICE_TABLE(snd_als300_ids) = {
 156         { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
 157         { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
 158         { 0, }
 159 };
 160
 161 MODULE_DEVICE_TABLE(pci, snd_als300_ids);
 162
 163 static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
 164 {
 165         outb(reg, port+GCR_INDEX);
 166         return inl(port+GCR_DATA);
 167 }
 168
 169 static inline void snd_als300_gcr_write(unsigned long port,
 170                                                 unsigned short reg, u32 val)
 171 {
 172         outb(reg, port+GCR_INDEX);
 173         outl(val, port+GCR_DATA);
 174 }
 175
 176 /* Enable/Disable Interrupts */
 177 static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
 178 {
 179         u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 180         snd_als300_dbgcallenter();
 181
 182         /* boolean XOR check, since old vs. new hardware have
 183            directly reversed bit setting for ENABLE and DISABLE.
 184            ALS300+ acts like newer versions of ALS300 */
 185         if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
 186                                                 (cmd == IRQ_ENABLE)) == 0)
 187                 tmp |= IRQ_SET_BIT;
 188         else
 189                 tmp &= ~IRQ_SET_BIT;
 190         snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
 191         snd_als300_dbgcallleave();
 192 }
 193
 194 static int snd_als300_free(struct snd_als300 *chip)
 195 {
 196         snd_als300_dbgcallenter();
 197         snd_als300_set_irq_flag(chip, IRQ_DISABLE);
 198         if (chip->irq >= 0)
 199                 free_irq(chip->irq, chip);
 200         pci_release_regions(chip->pci);
 201         pci_disable_device(chip->pci);
 202         kfree(chip);
 203         snd_als300_dbgcallleave();
 204         return 0;
 205 }
 206
 207 static int snd_als300_dev_free(struct snd_device *device)
 208 {
 209         struct snd_als300 *chip = device->device_data;
 210         return snd_als300_free(chip);
 211 }
 212
 213 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
 214 {
 215         u8 status;
 216         struct snd_als300 *chip = dev_id;
 217         struct snd_als300_substream_data *data;
 218
 219         status = inb(chip->port+ALS300_IRQ_STATUS);
 220         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
 221                 return IRQ_NONE;
 222
 223         /* ACK everything ASAP */
 224         outb(status, chip->port+ALS300_IRQ_STATUS);
 225         if (status & IRQ_PLAYBACK) {
 226                 if (chip->pcm && chip->playback_substream) {
 227                         data = chip->playback_substream->runtime->private_data;
 228                         data->period_flipflop ^= 1;
 229                         snd_pcm_period_elapsed(chip->playback_substream);
 230                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 231                 }
 232         }
 233         if (status & IRQ_CAPTURE) {
 234                 if (chip->pcm && chip->capture_substream) {
 235                         data = chip->capture_substream->runtime->private_data;
 236                         data->period_flipflop ^= 1;
 237                         snd_pcm_period_elapsed(chip->capture_substream);
 238                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 239                 }
 240         }
 241         return IRQ_HANDLED;
 242 }
 243
 244 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
 245 {
 246         u8 general, mpu, dram;
 247         struct snd_als300 *chip = dev_id;
 248         struct snd_als300_substream_data *data;
 249
 250         general = inb(chip->port+ALS300P_IRQ_STATUS);
 251         mpu = inb(chip->port+MPU_IRQ_STATUS);
 252         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 253
 254         /* shared IRQ, for different device?? Exit ASAP! */
 255         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 256                 return IRQ_NONE;
 257
 258         if (general & IRQ_PLAYBACK) {
 259                 if (chip->pcm && chip->playback_substream) {
 260                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 261                         data = chip->playback_substream->runtime->private_data;
 262                         data->period_flipflop ^= 1;
 263                         snd_pcm_period_elapsed(chip->playback_substream);
 264                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 265                 }
 266         }
 267         if (general & IRQ_CAPTURE) {
 268                 if (chip->pcm && chip->capture_substream) {
 269                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 270                         data = chip->capture_substream->runtime->private_data;
 271                         data->period_flipflop ^= 1;
 272                         snd_pcm_period_elapsed(chip->capture_substream);
 273                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 274                 }
 275         }
 276         /* FIXME: Ack other interrupt types. Not important right now as
 277          * those other devices aren't enabled. */
 278         return IRQ_HANDLED;
 279 }
 280
 281 static void __devexit snd_als300_remove(struct pci_dev *pci)
 282 {
 283         snd_als300_dbgcallenter();
 284         snd_card_free(pci_get_drvdata(pci));
 285         pci_set_drvdata(pci, NULL);
 286         snd_als300_dbgcallleave();
 287 }
 288
 289 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 290                                                         unsigned short reg)
 291 {
 292         int i;
 293         struct snd_als300 *chip = ac97->private_data;
 294
 295         for (i = 0; i < 1000; i++) {
 296                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 297                         break;
 298                 udelay(10);
 299         }
 300         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 301
 302         for (i = 0; i < 1000; i++) {
 303                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 304                         break;
 305                 udelay(10);
 306         }
 307         return inw(chip->port+AC97_READ);
 308 }
 309
 310 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 311                                 unsigned short reg, unsigned short val)
 312 {
 313         int i;
 314         struct snd_als300 *chip = ac97->private_data;
 315
 316         for (i = 0; i < 1000; i++) {
 317                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 318                         break;
 319                 udelay(10);
 320         }
 321         outl((reg << 24) | val, chip->port+AC97_ACCESS);
 322 }
 323
 324 static int snd_als300_ac97(struct snd_als300 *chip)
 325 {
 326         struct snd_ac97_bus *bus;
 327         struct snd_ac97_template ac97;
 328         int err;
 329         static struct snd_ac97_bus_ops ops = {
 330                 .write = snd_als300_ac97_write,
 331                 .read = snd_als300_ac97_read,
 332         };
 333
 334         snd_als300_dbgcallenter();
 335         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 336                 return err;
 337
 338         memset(&ac97, 0, sizeof(ac97));
 339         ac97.private_data = chip;
 340
 341         snd_als300_dbgcallleave();
 342         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 343 }
 344
 345 /* hardware definition
 346  *
 347  * In AC97 mode, we always use 48k/16bit/stereo.
 348  * Any request to change data type is ignored by
 349  * the card when it is running outside of legacy
 350  * mode.
 351  */
 352 static struct snd_pcm_hardware snd_als300_playback_hw =
 353 {
 354         .info =                 (SNDRV_PCM_INFO_MMAP |
 355                                 SNDRV_PCM_INFO_INTERLEAVED |
 356                                 SNDRV_PCM_INFO_PAUSE |
 357                                 SNDRV_PCM_INFO_MMAP_VALID),
 358         .formats =              SNDRV_PCM_FMTBIT_S16,
 359         .rates =                SNDRV_PCM_RATE_48000,
 360         .rate_min =             48000,
 361         .rate_max =             48000,
 362         .channels_min =         2,
 363         .channels_max =         2,
 364         .buffer_bytes_max =     64 * 1024,
 365         .period_bytes_min =     64,
 366         .period_bytes_max =     32 * 1024,
 367         .periods_min =          2,
 368         .periods_max =          2,
 369 };
 370
 371 static struct snd_pcm_hardware snd_als300_capture_hw =
 372 {
 373         .info =                 (SNDRV_PCM_INFO_MMAP |
 374                                 SNDRV_PCM_INFO_INTERLEAVED |
 375                                 SNDRV_PCM_INFO_PAUSE |
 376                                 SNDRV_PCM_INFO_MMAP_VALID),
 377         .formats =              SNDRV_PCM_FMTBIT_S16,
 378         .rates =                SNDRV_PCM_RATE_48000,
 379         .rate_min =             48000,
 380         .rate_max =             48000,
 381         .channels_min =         2,
 382         .channels_max =         2,
 383         .buffer_bytes_max =     64 * 1024,
 384         .period_bytes_min =     64,
 385         .period_bytes_max =     32 * 1024,
 386         .periods_min =          2,
 387         .periods_max =          2,
 388 };
 389
 390 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 391 {
 392         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 393         struct snd_pcm_runtime *runtime = substream->runtime;
 394         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 395                                                                 GFP_KERNEL);
 396
 397         if (!data)
 398                 return -ENOMEM;
 399         snd_als300_dbgcallenter();
 400         chip->playback_substream = substream;
 401         runtime->hw = snd_als300_playback_hw;
 402         runtime->private_data = data;
 403         data->control_register = PLAYBACK_CONTROL;
 404         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 405         snd_als300_dbgcallleave();
 406         return 0;
 407 }
 408
 409 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 410 {
 411         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 412         struct snd_als300_substream_data *data;
 413
 414         data = substream->runtime->private_data;
 415         snd_als300_dbgcallenter();
 416         kfree(data);
 417         chip->playback_substream = NULL;
 418         snd_pcm_lib_free_pages(substream);
 419         snd_als300_dbgcallleave();
 420         return 0;
 421 }
 422
 423 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 424 {
 425         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 426         struct snd_pcm_runtime *runtime = substream->runtime;
 427         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 428                                                                 GFP_KERNEL);
 429
 430         if (!data)
 431                 return -ENOMEM;
 432         snd_als300_dbgcallenter();
 433         chip->capture_substream = substream;
 434         runtime->hw = snd_als300_capture_hw;
 435         runtime->private_data = data;
 436         data->control_register = RECORD_CONTROL;
 437         data->block_counter_register = RECORD_BLOCK_COUNTER;
 438         snd_als300_dbgcallleave();
 439         return 0;
 440 }
 441
 442 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 443 {
 444         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 445         struct snd_als300_substream_data *data;
 446
 447         data = substream->runtime->private_data;
 448         snd_als300_dbgcallenter();
 449         kfree(data);
 450         chip->capture_substream = NULL;
 451         snd_pcm_lib_free_pages(substream);
 452         snd_als300_dbgcallleave();
 453         return 0;
 454 }
 455
 456 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 457                                     struct snd_pcm_hw_params *hw_params)
 458 {
 459         return snd_pcm_lib_malloc_pages(substream,
 460                                         params_buffer_bytes(hw_params));
 461 }
 462
 463 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 464 {
 465         return snd_pcm_lib_free_pages(substream);
 466 }
 467
 468 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 469 {
 470         u32 tmp;
 471         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 472         struct snd_pcm_runtime *runtime = substream->runtime;
 473         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 474         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 475
 476         snd_als300_dbgcallenter();
 477         spin_lock_irq(&chip->reg_lock);
 478         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 479         tmp &= ~TRANSFER_START;
 480
 481         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 482                                                 period_bytes, buffer_bytes);
 483
 484         /* set block size */
 485         tmp &= 0xffff0000;
 486         tmp |= period_bytes - 1;
 487         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 488
 489         /* set dma area */
 490         snd_als300_gcr_write(chip->port, PLAYBACK_START,
 491                                         runtime->dma_addr);
 492         snd_als300_gcr_write(chip->port, PLAYBACK_END,
 493                                         runtime->dma_addr + buffer_bytes - 1);
 494         spin_unlock_irq(&chip->reg_lock);
 495         snd_als300_dbgcallleave();
 496         return 0;
 497 }
 498
 499 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 500 {
 501         u32 tmp;
 502         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 503         struct snd_pcm_runtime *runtime = substream->runtime;
 504         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 505         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 506
 507         snd_als300_dbgcallenter();
 508         spin_lock_irq(&chip->reg_lock);
 509         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 510         tmp &= ~TRANSFER_START;
 511
 512         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 513                                                         buffer_bytes);
 514
 515         /* set block size */
 516         tmp &= 0xffff0000;
 517         tmp |= period_bytes - 1;
 518
 519         /* set dma area */
 520         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 521         snd_als300_gcr_write(chip->port, RECORD_START,
 522                                         runtime->dma_addr);
 523         snd_als300_gcr_write(chip->port, RECORD_END,
 524                                         runtime->dma_addr + buffer_bytes - 1);
 525         spin_unlock_irq(&chip->reg_lock);
 526         snd_als300_dbgcallleave();
 527         return 0;
 528 }
 529
 530 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 531 {
 532         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 533         u32 tmp;
 534         struct snd_als300_substream_data *data;
 535         unsigned short reg;
 536         int ret = 0;
 537
 538         data = substream->runtime->private_data;
 539         reg = data->control_register;
 540
 541         snd_als300_dbgcallenter();
 542         spin_lock(&chip->reg_lock);
 543         switch (cmd) {
 544         case SNDRV_PCM_TRIGGER_START:
 545         case SNDRV_PCM_TRIGGER_RESUME:
 546                 tmp = snd_als300_gcr_read(chip->port, reg);
 547                 data->period_flipflop = 1;
 548                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 549                 snd_als300_dbgplay("TRIGGER START\n");
 550                 break;
 551         case SNDRV_PCM_TRIGGER_STOP:
 552         case SNDRV_PCM_TRIGGER_SUSPEND:
 553                 tmp = snd_als300_gcr_read(chip->port, reg);
 554                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 555                 snd_als300_dbgplay("TRIGGER STOP\n");
 556                 break;
 557         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 558                 tmp = snd_als300_gcr_read(chip->port, reg);
 559                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 560                 snd_als300_dbgplay("TRIGGER PAUSE\n");
 561                 break;
 562         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 563                 tmp = snd_als300_gcr_read(chip->port, reg);
 564                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 565                 snd_als300_dbgplay("TRIGGER RELEASE\n");
 566                 break;
 567         default:
 568                 snd_als300_dbgplay("TRIGGER INVALID\n");
 569                 ret = -EINVAL;
 570         }
 571         spin_unlock(&chip->reg_lock);
 572         snd_als300_dbgcallleave();
 573         return ret;
 574 }
 575
 576 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 577 {
 578         u16 current_ptr;
 579         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 580         struct snd_als300_substream_data *data;
 581         unsigned short period_bytes;
 582
 583         data = substream->runtime->private_data;
 584         period_bytes = snd_pcm_lib_period_bytes(substream);
 585
 586         snd_als300_dbgcallenter();
 587         spin_lock(&chip->reg_lock);
 588         current_ptr = (u16) snd_als300_gcr_read(chip->port,
 589                                         data->block_counter_register) + 4;
 590         spin_unlock(&chip->reg_lock);
 591         if (current_ptr > period_bytes)
 592                 current_ptr = 0;
 593         else
 594                 current_ptr = period_bytes - current_ptr;
 595
 596         if (data->period_flipflop == 0)
 597                 current_ptr += period_bytes;
 598         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 599         snd_als300_dbgcallleave();
 600         return bytes_to_frames(substream->runtime, current_ptr);
 601 }
 602
 603 static struct snd_pcm_ops snd_als300_playback_ops = {
 604         .open =         snd_als300_playback_open,
 605         .close =        snd_als300_playback_close,
 606         .ioctl =        snd_pcm_lib_ioctl,
 607         .hw_params =    snd_als300_pcm_hw_params,
 608         .hw_free =      snd_als300_pcm_hw_free,
 609         .prepare =      snd_als300_playback_prepare,
 610         .trigger =      snd_als300_trigger,
 611         .pointer =      snd_als300_pointer,
 612 };
 613
 614 static struct snd_pcm_ops snd_als300_capture_ops = {
 615         .open =         snd_als300_capture_open,
 616         .close =        snd_als300_capture_close,
 617         .ioctl =        snd_pcm_lib_ioctl,
 618         .hw_params =    snd_als300_pcm_hw_params,
 619         .hw_free =      snd_als300_pcm_hw_free,
 620         .prepare =      snd_als300_capture_prepare,
 621         .trigger =      snd_als300_trigger,
 622         .pointer =      snd_als300_pointer,
 623 };
 624
 625 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 626 {
 627         struct snd_pcm *pcm;
 628         int err;
 629
 630         snd_als300_dbgcallenter();
 631         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 632         if (err < 0)
 633                 return err;
 634         pcm->private_data = chip;
 635         strcpy(pcm->name, "ALS300");
 636         chip->pcm = pcm;
 637
 638         /* set operators */
 639         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 640                                 &snd_als300_playback_ops);
 641         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 642                                 &snd_als300_capture_ops);
 643
 644         /* pre-allocation of buffers */
 645         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 646         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 647         snd_als300_dbgcallleave();
 648         return 0;
 649 }
 650
 651 static void snd_als300_init(struct snd_als300 *chip)
 652 {
 653         unsigned long flags;
 654         u32 tmp;
 655
 656         snd_als300_dbgcallenter();
 657         spin_lock_irqsave(&chip->reg_lock, flags);
 658         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 659                                                                 & 0x0000000F;
 660         /* Setup DRAM */
 661         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 662         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 663                                                 (tmp | DRAM_MODE_2)
 664                                                 & ~WRITE_TRANS_START);
 665
 666         /* Enable IRQ output */
 667         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 668
 669         /* Unmute hardware devices so their outputs get routed to
 670          * the onboard mixer */
 671         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 672         snd_als300_gcr_write(chip->port, MISC_CONTROL,
 673                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 674
 675         /* Reset volumes */
 676         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 677
 678         /* Make sure playback transfer is stopped */
 679         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 680         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 681                         tmp & ~TRANSFER_START);
 682         spin_unlock_irqrestore(&chip->reg_lock, flags);
 683         snd_als300_dbgcallleave();
 684 }
 685
 686 static int __devinit snd_als300_create(struct snd_card *card,
 687                                        struct pci_dev *pci, int chip_type,
 688                                        struct snd_als300 **rchip)
 689 {
 690         struct snd_als300 *chip;
 691         void *irq_handler;
 692         int err;
 693
 694         static struct snd_device_ops ops = {
 695                 .dev_free = snd_als300_dev_free,
 696         };
 697         *rchip = NULL;
 698
 699         snd_als300_dbgcallenter();
 700         if ((err = pci_enable_device(pci)) < 0)
 701                 return err;
 702
 703         if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
 704                 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
 705                 printk(KERN_ERR "error setting 28bit DMA mask\n");
 706                 pci_disable_device(pci);
 707                 return -ENXIO;
 708         }
 709         pci_set_master(pci);
 710
 711         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 712         if (chip == NULL) {
 713                 pci_disable_device(pci);
 714                 return -ENOMEM;
 715         }
 716
 717         chip->card = card;
 718         chip->pci = pci;
 719         chip->irq = -1;
 720         chip->chip_type = chip_type;
 721         spin_lock_init(&chip->reg_lock);
 722
 723         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 724                 kfree(chip);
 725                 pci_disable_device(pci);
 726                 return err;
 727         }
 728         chip->port = pci_resource_start(pci, 0);
 729
 730         if (chip->chip_type == DEVICE_ALS300_PLUS)
 731                 irq_handler = snd_als300plus_interrupt;
 732         else
 733                 irq_handler = snd_als300_interrupt;
 734
 735         if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
 736                         KBUILD_MODNAME, chip)) {
 737                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 738                 snd_als300_free(chip);
 739                 return -EBUSY;
 740         }
 741         chip->irq = pci->irq;
 742
 743
 744         snd_als300_init(chip);
 745
 746         err = snd_als300_ac97(chip);
 747         if (err < 0) {
 748                 snd_printk(KERN_WARNING "Could not create ac97\n");
 749                 snd_als300_free(chip);
 750                 return err;
 751         }
 752
 753         if ((err = snd_als300_new_pcm(chip)) < 0) {
 754                 snd_printk(KERN_WARNING "Could not create PCM\n");
 755                 snd_als300_free(chip);
 756                 return err;
 757         }
 758
 759         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 760                                                 chip, &ops)) < 0) {
 761                 snd_als300_free(chip);
 762                 return err;
 763         }
 764
 765         snd_card_set_dev(card, &pci->dev);
 766
 767         *rchip = chip;
 768         snd_als300_dbgcallleave();
 769         return 0;
 770 }
 771
 772 #ifdef CONFIG_PM_SLEEP
 773 static int snd_als300_suspend(struct device *dev)
 774 {
 775         struct pci_dev *pci = to_pci_dev(dev);
 776         struct snd_card *card = dev_get_drvdata(dev);
 777         struct snd_als300 *chip = card->private_data;
 778
 779         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 780         snd_pcm_suspend_all(chip->pcm);
 781         snd_ac97_suspend(chip->ac97);
 782
 783         pci_disable_device(pci);
 784         pci_save_state(pci);
 785         pci_set_power_state(pci, PCI_D3hot);
 786         return 0;
 787 }
 788
 789 static int snd_als300_resume(struct device *dev)
 790 {
 791         struct pci_dev *pci = to_pci_dev(dev);
 792         struct snd_card *card = dev_get_drvdata(dev);
 793         struct snd_als300 *chip = card->private_data;
 794
 795         pci_set_power_state(pci, PCI_D0);
 796         pci_restore_state(pci);
 797         if (pci_enable_device(pci) < 0) {
 798                 printk(KERN_ERR "als300: pci_enable_device failed, "
 799                        "disabling device\n");
 800                 snd_card_disconnect(card);
 801                 return -EIO;
 802         }
 803         pci_set_master(pci);
 804
 805         snd_als300_init(chip);
 806         snd_ac97_resume(chip->ac97);
 807
 808         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 809         return 0;
 810 }
 811
 812 static SIMPLE_DEV_PM_OPS(snd_als300_pm, snd_als300_suspend, snd_als300_resume);
 813 #define SND_ALS300_PM_OPS       &snd_als300_pm
 814 #else
 815 #define SND_ALS300_PM_OPS       NULL
 816 #endif
 817
 818 static int __devinit snd_als300_probe(struct pci_dev *pci,
 819                              const struct pci_device_id *pci_id)
 820 {
 821         static int dev;
 822         struct snd_card *card;
 823         struct snd_als300 *chip;
 824         int err, chip_type;
 825
 826         if (dev >= SNDRV_CARDS)
 827                 return -ENODEV;
 828         if (!enable[dev]) {
 829                 dev++;
 830                 return -ENOENT;
 831         }
 832
 833         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 834
 835         if (err < 0)
 836                 return err;
 837
 838         chip_type = pci_id->driver_data;
 839
 840         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 841                 snd_card_free(card);
 842                 return err;
 843         }
 844         card->private_data = chip;
 845
 846         strcpy(card->driver, "ALS300");
 847         if (chip->chip_type == DEVICE_ALS300_PLUS)
 848                 /* don't know much about ALS300+ yet
 849                  * print revision number for now */
 850                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 851         else
 852                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 853                                                         chip->revision - 1);
 854         sprintf(card->longname, "%s at 0x%lx irq %i",
 855                                 card->shortname, chip->port, chip->irq);
 856
 857         if ((err = snd_card_register(card)) < 0) {
 858                 snd_card_free(card);
 859                 return err;
 860         }
 861         pci_set_drvdata(pci, card);
 862         dev++;
 863         return 0;
 864 }
 865
 866 static struct pci_driver als300_driver = {
 867         .name = KBUILD_MODNAME,
 868         .id_table = snd_als300_ids,
 869         .probe = snd_als300_probe,
 870         .remove = __devexit_p(snd_als300_remove),
 871         .driver = {
 872                 .pm = SND_ALS300_PM_OPS,
 873         },
 874 };
 875
 876 module_pci_driver(als300_driver);