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   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/moduleparam.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 119
 120 struct snd_als300 {
 121         unsigned long port;
 122         spinlock_t reg_lock;
 123         struct snd_card *card;
 124         struct pci_dev *pci;
 125
 126         struct snd_pcm *pcm;
 127         struct snd_pcm_substream *playback_substream;
 128         struct snd_pcm_substream *capture_substream;
 129
 130         struct snd_ac97 *ac97;
 131         struct snd_opl3 *opl3;
 132
 133         struct resource *res_port;
 134
 135         int irq;
 136
 137         int chip_type; /* ALS300 or ALS300+ */
 138
 139         char revision;
 140 };
 141
 142 struct snd_als300_substream_data {
 143         int period_flipflop;
 144         int control_register;
 145         int block_counter_register;
 146 };
 147
 148 static DEFINE_PCI_DEVICE_TABLE(snd_als300_ids) = {
 149         { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
 150         { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
 151         { 0, }
 152 };
 153
 154 MODULE_DEVICE_TABLE(pci, snd_als300_ids);
 155
 156 static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
 157 {
 158         outb(reg, port+GCR_INDEX);
 159         return inl(port+GCR_DATA);
 160 }
 161
 162 static inline void snd_als300_gcr_write(unsigned long port,
 163                                                 unsigned short reg, u32 val)
 164 {
 165         outb(reg, port+GCR_INDEX);
 166         outl(val, port+GCR_DATA);
 167 }
 168
 169 /* Enable/Disable Interrupts */
 170 static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
 171 {
 172         u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 173         snd_als300_dbgcallenter();
 174
 175         /* boolean XOR check, since old vs. new hardware have
 176            directly reversed bit setting for ENABLE and DISABLE.
 177            ALS300+ acts like newer versions of ALS300 */
 178         if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
 179                                                 (cmd == IRQ_ENABLE)) == 0)
 180                 tmp |= IRQ_SET_BIT;
 181         else
 182                 tmp &= ~IRQ_SET_BIT;
 183         snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
 184         snd_als300_dbgcallleave();
 185 }
 186
 187 static int snd_als300_free(struct snd_als300 *chip)
 188 {
 189         snd_als300_dbgcallenter();
 190         snd_als300_set_irq_flag(chip, IRQ_DISABLE);
 191         if (chip->irq >= 0)
 192                 free_irq(chip->irq, chip);
 193         pci_release_regions(chip->pci);
 194         pci_disable_device(chip->pci);
 195         kfree(chip);
 196         snd_als300_dbgcallleave();
 197         return 0;
 198 }
 199
 200 static int snd_als300_dev_free(struct snd_device *device)
 201 {
 202         struct snd_als300 *chip = device->device_data;
 203         return snd_als300_free(chip);
 204 }
 205
 206 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
 207 {
 208         u8 status;
 209         struct snd_als300 *chip = dev_id;
 210         struct snd_als300_substream_data *data;
 211
 212         status = inb(chip->port+ALS300_IRQ_STATUS);
 213         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
 214                 return IRQ_NONE;
 215
 216         /* ACK everything ASAP */
 217         outb(status, chip->port+ALS300_IRQ_STATUS);
 218         if (status & IRQ_PLAYBACK) {
 219                 if (chip->pcm && chip->playback_substream) {
 220                         data = chip->playback_substream->runtime->private_data;
 221                         data->period_flipflop ^= 1;
 222                         snd_pcm_period_elapsed(chip->playback_substream);
 223                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 224                 }
 225         }
 226         if (status & IRQ_CAPTURE) {
 227                 if (chip->pcm && chip->capture_substream) {
 228                         data = chip->capture_substream->runtime->private_data;
 229                         data->period_flipflop ^= 1;
 230                         snd_pcm_period_elapsed(chip->capture_substream);
 231                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 232                 }
 233         }
 234         return IRQ_HANDLED;
 235 }
 236
 237 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
 238 {
 239         u8 general, mpu, dram;
 240         struct snd_als300 *chip = dev_id;
 241         struct snd_als300_substream_data *data;
 242
 243         general = inb(chip->port+ALS300P_IRQ_STATUS);
 244         mpu = inb(chip->port+MPU_IRQ_STATUS);
 245         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 246
 247         /* shared IRQ, for different device?? Exit ASAP! */
 248         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 249                 return IRQ_NONE;
 250
 251         if (general & IRQ_PLAYBACK) {
 252                 if (chip->pcm && chip->playback_substream) {
 253                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 254                         data = chip->playback_substream->runtime->private_data;
 255                         data->period_flipflop ^= 1;
 256                         snd_pcm_period_elapsed(chip->playback_substream);
 257                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 258                 }
 259         }
 260         if (general & IRQ_CAPTURE) {
 261                 if (chip->pcm && chip->capture_substream) {
 262                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 263                         data = chip->capture_substream->runtime->private_data;
 264                         data->period_flipflop ^= 1;
 265                         snd_pcm_period_elapsed(chip->capture_substream);
 266                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 267                 }
 268         }
 269         /* FIXME: Ack other interrupt types. Not important right now as
 270          * those other devices aren't enabled. */
 271         return IRQ_HANDLED;
 272 }
 273
 274 static void __devexit snd_als300_remove(struct pci_dev *pci)
 275 {
 276         snd_als300_dbgcallenter();
 277         snd_card_free(pci_get_drvdata(pci));
 278         pci_set_drvdata(pci, NULL);
 279         snd_als300_dbgcallleave();
 280 }
 281
 282 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 283                                                         unsigned short reg)
 284 {
 285         int i;
 286         struct snd_als300 *chip = ac97->private_data;
 287
 288         for (i = 0; i < 1000; i++) {
 289                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 290                         break;
 291                 udelay(10);
 292         }
 293         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 294
 295         for (i = 0; i < 1000; i++) {
 296                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 297                         break;
 298                 udelay(10);
 299         }
 300         return inw(chip->port+AC97_READ);
 301 }
 302
 303 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 304                                 unsigned short reg, unsigned short val)
 305 {
 306         int i;
 307         struct snd_als300 *chip = ac97->private_data;
 308
 309         for (i = 0; i < 1000; i++) {
 310                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 311                         break;
 312                 udelay(10);
 313         }
 314         outl((reg << 24) | val, chip->port+AC97_ACCESS);
 315 }
 316
 317 static int snd_als300_ac97(struct snd_als300 *chip)
 318 {
 319         struct snd_ac97_bus *bus;
 320         struct snd_ac97_template ac97;
 321         int err;
 322         static struct snd_ac97_bus_ops ops = {
 323                 .write = snd_als300_ac97_write,
 324                 .read = snd_als300_ac97_read,
 325         };
 326
 327         snd_als300_dbgcallenter();
 328         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 329                 return err;
 330
 331         memset(&ac97, 0, sizeof(ac97));
 332         ac97.private_data = chip;
 333
 334         snd_als300_dbgcallleave();
 335         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 336 }
 337
 338 /* hardware definition
 339  *
 340  * In AC97 mode, we always use 48k/16bit/stereo.
 341  * Any request to change data type is ignored by
 342  * the card when it is running outside of legacy
 343  * mode.
 344  */
 345 static struct snd_pcm_hardware snd_als300_playback_hw =
 346 {
 347         .info =                 (SNDRV_PCM_INFO_MMAP |
 348                                 SNDRV_PCM_INFO_INTERLEAVED |
 349                                 SNDRV_PCM_INFO_PAUSE |
 350                                 SNDRV_PCM_INFO_MMAP_VALID),
 351         .formats =              SNDRV_PCM_FMTBIT_S16,
 352         .rates =                SNDRV_PCM_RATE_48000,
 353         .rate_min =             48000,
 354         .rate_max =             48000,
 355         .channels_min =         2,
 356         .channels_max =         2,
 357         .buffer_bytes_max =     64 * 1024,
 358         .period_bytes_min =     64,
 359         .period_bytes_max =     32 * 1024,
 360         .periods_min =          2,
 361         .periods_max =          2,
 362 };
 363
 364 static struct snd_pcm_hardware snd_als300_capture_hw =
 365 {
 366         .info =                 (SNDRV_PCM_INFO_MMAP |
 367                                 SNDRV_PCM_INFO_INTERLEAVED |
 368                                 SNDRV_PCM_INFO_PAUSE |
 369                                 SNDRV_PCM_INFO_MMAP_VALID),
 370         .formats =              SNDRV_PCM_FMTBIT_S16,
 371         .rates =                SNDRV_PCM_RATE_48000,
 372         .rate_min =             48000,
 373         .rate_max =             48000,
 374         .channels_min =         2,
 375         .channels_max =         2,
 376         .buffer_bytes_max =     64 * 1024,
 377         .period_bytes_min =     64,
 378         .period_bytes_max =     32 * 1024,
 379         .periods_min =          2,
 380         .periods_max =          2,
 381 };
 382
 383 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 384 {
 385         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 386         struct snd_pcm_runtime *runtime = substream->runtime;
 387         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 388                                                                 GFP_KERNEL);
 389
 390         snd_als300_dbgcallenter();
 391         chip->playback_substream = substream;
 392         runtime->hw = snd_als300_playback_hw;
 393         runtime->private_data = data;
 394         data->control_register = PLAYBACK_CONTROL;
 395         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 396         snd_als300_dbgcallleave();
 397         return 0;
 398 }
 399
 400 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 401 {
 402         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 403         struct snd_als300_substream_data *data;
 404
 405         data = substream->runtime->private_data;
 406         snd_als300_dbgcallenter();
 407         kfree(data);
 408         chip->playback_substream = NULL;
 409         snd_pcm_lib_free_pages(substream);
 410         snd_als300_dbgcallleave();
 411         return 0;
 412 }
 413
 414 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 415 {
 416         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 417         struct snd_pcm_runtime *runtime = substream->runtime;
 418         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 419                                                                 GFP_KERNEL);
 420
 421         snd_als300_dbgcallenter();
 422         chip->capture_substream = substream;
 423         runtime->hw = snd_als300_capture_hw;
 424         runtime->private_data = data;
 425         data->control_register = RECORD_CONTROL;
 426         data->block_counter_register = RECORD_BLOCK_COUNTER;
 427         snd_als300_dbgcallleave();
 428         return 0;
 429 }
 430
 431 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 432 {
 433         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 434         struct snd_als300_substream_data *data;
 435
 436         data = substream->runtime->private_data;
 437         snd_als300_dbgcallenter();
 438         kfree(data);
 439         chip->capture_substream = NULL;
 440         snd_pcm_lib_free_pages(substream);
 441         snd_als300_dbgcallleave();
 442         return 0;
 443 }
 444
 445 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 446                                     struct snd_pcm_hw_params *hw_params)
 447 {
 448         return snd_pcm_lib_malloc_pages(substream,
 449                                         params_buffer_bytes(hw_params));
 450 }
 451
 452 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 453 {
 454         return snd_pcm_lib_free_pages(substream);
 455 }
 456
 457 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 458 {
 459         u32 tmp;
 460         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 461         struct snd_pcm_runtime *runtime = substream->runtime;
 462         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 463         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 464
 465         snd_als300_dbgcallenter();
 466         spin_lock_irq(&chip->reg_lock);
 467         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 468         tmp &= ~TRANSFER_START;
 469
 470         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 471                                                 period_bytes, buffer_bytes);
 472
 473         /* set block size */
 474         tmp &= 0xffff0000;
 475         tmp |= period_bytes - 1;
 476         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 477
 478         /* set dma area */
 479         snd_als300_gcr_write(chip->port, PLAYBACK_START,
 480                                         runtime->dma_addr);
 481         snd_als300_gcr_write(chip->port, PLAYBACK_END,
 482                                         runtime->dma_addr + buffer_bytes - 1);
 483         spin_unlock_irq(&chip->reg_lock);
 484         snd_als300_dbgcallleave();
 485         return 0;
 486 }
 487
 488 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 489 {
 490         u32 tmp;
 491         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 492         struct snd_pcm_runtime *runtime = substream->runtime;
 493         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 494         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 495
 496         snd_als300_dbgcallenter();
 497         spin_lock_irq(&chip->reg_lock);
 498         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 499         tmp &= ~TRANSFER_START;
 500
 501         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 502                                                         buffer_bytes);
 503
 504         /* set block size */
 505         tmp &= 0xffff0000;
 506         tmp |= period_bytes - 1;
 507
 508         /* set dma area */
 509         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 510         snd_als300_gcr_write(chip->port, RECORD_START,
 511                                         runtime->dma_addr);
 512         snd_als300_gcr_write(chip->port, RECORD_END,
 513                                         runtime->dma_addr + buffer_bytes - 1);
 514         spin_unlock_irq(&chip->reg_lock);
 515         snd_als300_dbgcallleave();
 516         return 0;
 517 }
 518
 519 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 520 {
 521         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 522         u32 tmp;
 523         struct snd_als300_substream_data *data;
 524         unsigned short reg;
 525         int ret = 0;
 526
 527         data = substream->runtime->private_data;
 528         reg = data->control_register;
 529
 530         snd_als300_dbgcallenter();
 531         spin_lock(&chip->reg_lock);
 532         switch (cmd) {
 533         case SNDRV_PCM_TRIGGER_START:
 534         case SNDRV_PCM_TRIGGER_RESUME:
 535                 tmp = snd_als300_gcr_read(chip->port, reg);
 536                 data->period_flipflop = 1;
 537                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 538                 snd_als300_dbgplay("TRIGGER START\n");
 539                 break;
 540         case SNDRV_PCM_TRIGGER_STOP:
 541         case SNDRV_PCM_TRIGGER_SUSPEND:
 542                 tmp = snd_als300_gcr_read(chip->port, reg);
 543                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 544                 snd_als300_dbgplay("TRIGGER STOP\n");
 545                 break;
 546         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 547                 tmp = snd_als300_gcr_read(chip->port, reg);
 548                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 549                 snd_als300_dbgplay("TRIGGER PAUSE\n");
 550                 break;
 551         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 552                 tmp = snd_als300_gcr_read(chip->port, reg);
 553                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 554                 snd_als300_dbgplay("TRIGGER RELEASE\n");
 555                 break;
 556         default:
 557                 snd_als300_dbgplay("TRIGGER INVALID\n");
 558                 ret = -EINVAL;
 559         }
 560         spin_unlock(&chip->reg_lock);
 561         snd_als300_dbgcallleave();
 562         return ret;
 563 }
 564
 565 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 566 {
 567         u16 current_ptr;
 568         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 569         struct snd_als300_substream_data *data;
 570         unsigned short period_bytes;
 571
 572         data = substream->runtime->private_data;
 573         period_bytes = snd_pcm_lib_period_bytes(substream);
 574
 575         snd_als300_dbgcallenter();
 576         spin_lock(&chip->reg_lock);
 577         current_ptr = (u16) snd_als300_gcr_read(chip->port,
 578                                         data->block_counter_register) + 4;
 579         spin_unlock(&chip->reg_lock);
 580         if (current_ptr > period_bytes)
 581                 current_ptr = 0;
 582         else
 583                 current_ptr = period_bytes - current_ptr;
 584
 585         if (data->period_flipflop == 0)
 586                 current_ptr += period_bytes;
 587         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 588         snd_als300_dbgcallleave();
 589         return bytes_to_frames(substream->runtime, current_ptr);
 590 }
 591
 592 static struct snd_pcm_ops snd_als300_playback_ops = {
 593         .open =         snd_als300_playback_open,
 594         .close =        snd_als300_playback_close,
 595         .ioctl =        snd_pcm_lib_ioctl,
 596         .hw_params =    snd_als300_pcm_hw_params,
 597         .hw_free =      snd_als300_pcm_hw_free,
 598         .prepare =      snd_als300_playback_prepare,
 599         .trigger =      snd_als300_trigger,
 600         .pointer =      snd_als300_pointer,
 601 };
 602
 603 static struct snd_pcm_ops snd_als300_capture_ops = {
 604         .open =         snd_als300_capture_open,
 605         .close =        snd_als300_capture_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_capture_prepare,
 610         .trigger =      snd_als300_trigger,
 611         .pointer =      snd_als300_pointer,
 612 };
 613
 614 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 615 {
 616         struct snd_pcm *pcm;
 617         int err;
 618
 619         snd_als300_dbgcallenter();
 620         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 621         if (err < 0)
 622                 return err;
 623         pcm->private_data = chip;
 624         strcpy(pcm->name, "ALS300");
 625         chip->pcm = pcm;
 626
 627         /* set operators */
 628         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 629                                 &snd_als300_playback_ops);
 630         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 631                                 &snd_als300_capture_ops);
 632
 633         /* pre-allocation of buffers */
 634         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 635         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 636         snd_als300_dbgcallleave();
 637         return 0;
 638 }
 639
 640 static void snd_als300_init(struct snd_als300 *chip)
 641 {
 642         unsigned long flags;
 643         u32 tmp;
 644
 645         snd_als300_dbgcallenter();
 646         spin_lock_irqsave(&chip->reg_lock, flags);
 647         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 648                                                                 & 0x0000000F;
 649         /* Setup DRAM */
 650         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 651         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 652                                                 (tmp | DRAM_MODE_2)
 653                                                 & ~WRITE_TRANS_START);
 654
 655         /* Enable IRQ output */
 656         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 657
 658         /* Unmute hardware devices so their outputs get routed to
 659          * the onboard mixer */
 660         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 661         snd_als300_gcr_write(chip->port, MISC_CONTROL,
 662                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 663
 664         /* Reset volumes */
 665         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 666
 667         /* Make sure playback transfer is stopped */
 668         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 669         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 670                         tmp & ~TRANSFER_START);
 671         spin_unlock_irqrestore(&chip->reg_lock, flags);
 672         snd_als300_dbgcallleave();
 673 }
 674
 675 static int __devinit snd_als300_create(struct snd_card *card,
 676                                        struct pci_dev *pci, int chip_type,
 677                                        struct snd_als300 **rchip)
 678 {
 679         struct snd_als300 *chip;
 680         void *irq_handler;
 681         int err;
 682
 683         static struct snd_device_ops ops = {
 684                 .dev_free = snd_als300_dev_free,
 685         };
 686         *rchip = NULL;
 687
 688         snd_als300_dbgcallenter();
 689         if ((err = pci_enable_device(pci)) < 0)
 690                 return err;
 691
 692         if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
 693                 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
 694                 printk(KERN_ERR "error setting 28bit DMA mask\n");
 695                 pci_disable_device(pci);
 696                 return -ENXIO;
 697         }
 698         pci_set_master(pci);
 699
 700         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 701         if (chip == NULL) {
 702                 pci_disable_device(pci);
 703                 return -ENOMEM;
 704         }
 705
 706         chip->card = card;
 707         chip->pci = pci;
 708         chip->irq = -1;
 709         chip->chip_type = chip_type;
 710         spin_lock_init(&chip->reg_lock);
 711
 712         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 713                 kfree(chip);
 714                 pci_disable_device(pci);
 715                 return err;
 716         }
 717         chip->port = pci_resource_start(pci, 0);
 718
 719         if (chip->chip_type == DEVICE_ALS300_PLUS)
 720                 irq_handler = snd_als300plus_interrupt;
 721         else
 722                 irq_handler = snd_als300_interrupt;
 723
 724         if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
 725                         card->shortname, chip)) {
 726                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 727                 snd_als300_free(chip);
 728                 return -EBUSY;
 729         }
 730         chip->irq = pci->irq;
 731
 732
 733         snd_als300_init(chip);
 734
 735         err = snd_als300_ac97(chip);
 736         if (err < 0) {
 737                 snd_printk(KERN_WARNING "Could not create ac97\n");
 738                 snd_als300_free(chip);
 739                 return err;
 740         }
 741
 742         if ((err = snd_als300_new_pcm(chip)) < 0) {
 743                 snd_printk(KERN_WARNING "Could not create PCM\n");
 744                 snd_als300_free(chip);
 745                 return err;
 746         }
 747
 748         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 749                                                 chip, &ops)) < 0) {
 750                 snd_als300_free(chip);
 751                 return err;
 752         }
 753
 754         snd_card_set_dev(card, &pci->dev);
 755
 756         *rchip = chip;
 757         snd_als300_dbgcallleave();
 758         return 0;
 759 }
 760
 761 #ifdef CONFIG_PM
 762 static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
 763 {
 764         struct snd_card *card = pci_get_drvdata(pci);
 765         struct snd_als300 *chip = card->private_data;
 766
 767         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 768         snd_pcm_suspend_all(chip->pcm);
 769         snd_ac97_suspend(chip->ac97);
 770
 771         pci_disable_device(pci);
 772         pci_save_state(pci);
 773         pci_set_power_state(pci, pci_choose_state(pci, state));
 774         return 0;
 775 }
 776
 777 static int snd_als300_resume(struct pci_dev *pci)
 778 {
 779         struct snd_card *card = pci_get_drvdata(pci);
 780         struct snd_als300 *chip = card->private_data;
 781
 782         pci_set_power_state(pci, PCI_D0);
 783         pci_restore_state(pci);
 784         if (pci_enable_device(pci) < 0) {
 785                 printk(KERN_ERR "als300: pci_enable_device failed, "
 786                        "disabling device\n");
 787                 snd_card_disconnect(card);
 788                 return -EIO;
 789         }
 790         pci_set_master(pci);
 791
 792         snd_als300_init(chip);
 793         snd_ac97_resume(chip->ac97);
 794
 795         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 796         return 0;
 797 }
 798 #endif
 799
 800 static int __devinit snd_als300_probe(struct pci_dev *pci,
 801                              const struct pci_device_id *pci_id)
 802 {
 803         static int dev;
 804         struct snd_card *card;
 805         struct snd_als300 *chip;
 806         int err, chip_type;
 807
 808         if (dev >= SNDRV_CARDS)
 809                 return -ENODEV;
 810         if (!enable[dev]) {
 811                 dev++;
 812                 return -ENOENT;
 813         }
 814
 815         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 816
 817         if (err < 0)
 818                 return err;
 819
 820         chip_type = pci_id->driver_data;
 821
 822         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 823                 snd_card_free(card);
 824                 return err;
 825         }
 826         card->private_data = chip;
 827
 828         strcpy(card->driver, "ALS300");
 829         if (chip->chip_type == DEVICE_ALS300_PLUS)
 830                 /* don't know much about ALS300+ yet
 831                  * print revision number for now */
 832                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 833         else
 834                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 835                                                         chip->revision - 1);
 836         sprintf(card->longname, "%s at 0x%lx irq %i",
 837                                 card->shortname, chip->port, chip->irq);
 838
 839         if ((err = snd_card_register(card)) < 0) {
 840                 snd_card_free(card);
 841                 return err;
 842         }
 843         pci_set_drvdata(pci, card);
 844         dev++;
 845         return 0;
 846 }
 847
 848 static struct pci_driver driver = {
 849         .name = "ALS300",
 850         .id_table = snd_als300_ids,
 851         .probe = snd_als300_probe,
 852         .remove = __devexit_p(snd_als300_remove),
 853 #ifdef CONFIG_PM
 854         .suspend = snd_als300_suspend,
 855         .resume = snd_als300_resume,
 856 #endif
 857 };
 858
 859 static int __init alsa_card_als300_init(void)
 860 {
 861         return pci_register_driver(&driver);
 862 }
 863
 864 static void __exit alsa_card_als300_exit(void)
 865 {
 866         pci_unregister_driver(&driver);
 867 }
 868
 869 module_init(alsa_card_als300_init)
 870 module_exit(alsa_card_als300_exit)