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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 <sound/driver.h>
  34 #include <linux/delay.h>
  35 #include <linux/init.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/pci.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/slab.h>
  41
  42 #include <asm/io.h>
  43
  44 #include <sound/core.h>
  45 #include <sound/control.h>
  46 #include <sound/initval.h>
  47 #include <sound/pcm.h>
  48 #include <sound/pcm_params.h>
  49 #include <sound/ac97_codec.h>
  50 #include <sound/opl3.h>
  51
  52 /* snd_als300_set_irq_flag */
  53 #define IRQ_DISABLE             0
  54 #define IRQ_ENABLE              1
  55
  56 /* I/O port layout */
  57 #define AC97_ACCESS             0x00
  58 #define AC97_READ               0x04
  59 #define AC97_STATUS             0x06
  60 #define   AC97_DATA_AVAIL               (1<<6)
  61 #define   AC97_BUSY                     (1<<7)
  62 #define ALS300_IRQ_STATUS       0x07            /* ALS300 Only */
  63 #define   IRQ_PLAYBACK                  (1<<3)
  64 #define   IRQ_CAPTURE                   (1<<2)
  65 #define GCR_DATA                0x08
  66 #define GCR_INDEX               0x0C
  67 #define ALS300P_DRAM_IRQ_STATUS 0x0D            /* ALS300+ Only */
  68 #define MPU_IRQ_STATUS          0x0E            /* ALS300 Rev. E+, ALS300+ */
  69 #define ALS300P_IRQ_STATUS      0x0F            /* ALS300+ Only */
  70
  71 /* General Control Registers */
  72 #define PLAYBACK_START          0x80
  73 #define PLAYBACK_END            0x81
  74 #define PLAYBACK_CONTROL        0x82
  75 #define   TRANSFER_START                (1<<16)
  76 #define   FIFO_PAUSE                    (1<<17)
  77 #define RECORD_START            0x83
  78 #define RECORD_END              0x84
  79 #define RECORD_CONTROL          0x85
  80 #define DRAM_WRITE_CONTROL      0x8B
  81 #define   WRITE_TRANS_START             (1<<16)
  82 #define   DRAM_MODE_2                   (1<<17)
  83 #define MISC_CONTROL            0x8C
  84 #define   IRQ_SET_BIT                   (1<<15)
  85 #define   VMUTE_NORMAL                  (1<<20)
  86 #define   MMUTE_NORMAL                  (1<<21)
  87 #define MUS_VOC_VOL             0x8E
  88 #define PLAYBACK_BLOCK_COUNTER  0x9A
  89 #define RECORD_BLOCK_COUNTER    0x9B
  90
  91 #define DEBUG_CALLS     1
  92 #define DEBUG_PLAY_REC  1
  93
  94 #if DEBUG_CALLS
  95 #define snd_als300_dbgcalls(format, args...) printk(format, ##args)
  96 #define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __FUNCTION__)
  97 #define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __FUNCTION__)
  98 #else
  99 #define snd_als300_dbgcalls(format, args...)
 100 #define snd_als300_dbgcallenter()
 101 #define snd_als300_dbgcallleave()
 102 #endif
 103
 104 #if DEBUG_PLAY_REC
 105 #define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
 106 #else
 107 #define snd_als300_dbgplay(format, args...)
 108 #endif
 109
 110 enum {DEVICE_ALS300, DEVICE_ALS300_PLUS};
 111
 112 MODULE_AUTHOR("Ash Willis <ashwillis@programmer.net>");
 113 MODULE_DESCRIPTION("Avance Logic ALS300");
 114 MODULE_LICENSE("GPL");
 115 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS300},{Avance Logic,ALS300+}}");
 116
 117 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 118 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 119 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 120
 121 struct snd_als300 {
 122         unsigned long port;
 123         spinlock_t reg_lock;
 124         struct snd_card *card;
 125         struct pci_dev *pci;
 126
 127         struct snd_pcm *pcm;
 128         struct snd_pcm_substream *playback_substream;
 129         struct snd_pcm_substream *capture_substream;
 130
 131         struct snd_ac97 *ac97;
 132         struct snd_opl3 *opl3;
 133
 134         struct resource *res_port;
 135
 136         int irq;
 137
 138         int chip_type; /* ALS300 or ALS300+ */
 139
 140         char revision;
 141 };
 142
 143 struct snd_als300_substream_data {
 144         int period_flipflop;
 145         int control_register;
 146         int block_counter_register;
 147 };
 148
 149 static struct pci_device_id snd_als300_ids[] = {
 150         { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
 151         { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
 152         { 0, }
 153 };
 154
 155 MODULE_DEVICE_TABLE(pci, snd_als300_ids);
 156
 157 static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
 158 {
 159         outb(reg, port+GCR_INDEX);
 160         return inl(port+GCR_DATA);
 161 }
 162
 163 static inline void snd_als300_gcr_write(unsigned long port,
 164                                                 unsigned short reg, u32 val)
 165 {
 166         outb(reg, port+GCR_INDEX);
 167         outl(val, port+GCR_DATA);
 168 }
 169
 170 /* Enable/Disable Interrupts */
 171 static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
 172 {
 173         u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 174         snd_als300_dbgcallenter();
 175
 176         /* boolean XOR check, since old vs. new hardware have
 177            directly reversed bit setting for ENABLE and DISABLE.
 178            ALS300+ acts like newer versions of ALS300 */
 179         if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
 180                                                 (cmd == IRQ_ENABLE)) == 0)
 181                 tmp |= IRQ_SET_BIT;
 182         else
 183                 tmp &= ~IRQ_SET_BIT;
 184         snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
 185         snd_als300_dbgcallleave();
 186 }
 187
 188 static int snd_als300_free(struct snd_als300 *chip)
 189 {
 190         snd_als300_dbgcallenter();
 191         snd_als300_set_irq_flag(chip, IRQ_DISABLE);
 192         if (chip->irq >= 0)
 193                 free_irq(chip->irq, chip);
 194         pci_release_regions(chip->pci);
 195         pci_disable_device(chip->pci);
 196         kfree(chip);
 197         snd_als300_dbgcallleave();
 198         return 0;
 199 }
 200
 201 static int snd_als300_dev_free(struct snd_device *device)
 202 {
 203         struct snd_als300 *chip = device->device_data;
 204         return snd_als300_free(chip);
 205 }
 206
 207 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
 208 {
 209         u8 status;
 210         struct snd_als300 *chip = dev_id;
 211         struct snd_als300_substream_data *data;
 212
 213         status = inb(chip->port+ALS300_IRQ_STATUS);
 214         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
 215                 return IRQ_NONE;
 216
 217         /* ACK everything ASAP */
 218         outb(status, chip->port+ALS300_IRQ_STATUS);
 219         if (status & IRQ_PLAYBACK) {
 220                 if (chip->pcm && chip->playback_substream) {
 221                         data = chip->playback_substream->runtime->private_data;
 222                         data->period_flipflop ^= 1;
 223                         snd_pcm_period_elapsed(chip->playback_substream);
 224                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 225                 }
 226         }
 227         if (status & IRQ_CAPTURE) {
 228                 if (chip->pcm && chip->capture_substream) {
 229                         data = chip->capture_substream->runtime->private_data;
 230                         data->period_flipflop ^= 1;
 231                         snd_pcm_period_elapsed(chip->capture_substream);
 232                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 233                 }
 234         }
 235         return IRQ_HANDLED;
 236 }
 237
 238 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
 239 {
 240         u8 general, mpu, dram;
 241         struct snd_als300 *chip = dev_id;
 242         struct snd_als300_substream_data *data;
 243
 244         general = inb(chip->port+ALS300P_IRQ_STATUS);
 245         mpu = inb(chip->port+MPU_IRQ_STATUS);
 246         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 247
 248         /* shared IRQ, for different device?? Exit ASAP! */
 249         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 250                 return IRQ_NONE;
 251
 252         if (general & IRQ_PLAYBACK) {
 253                 if (chip->pcm && chip->playback_substream) {
 254                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 255                         data = chip->playback_substream->runtime->private_data;
 256                         data->period_flipflop ^= 1;
 257                         snd_pcm_period_elapsed(chip->playback_substream);
 258                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 259                 }
 260         }
 261         if (general & IRQ_CAPTURE) {
 262                 if (chip->pcm && chip->capture_substream) {
 263                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 264                         data = chip->capture_substream->runtime->private_data;
 265                         data->period_flipflop ^= 1;
 266                         snd_pcm_period_elapsed(chip->capture_substream);
 267                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 268                 }
 269         }
 270         /* FIXME: Ack other interrupt types. Not important right now as
 271          * those other devices aren't enabled. */
 272         return IRQ_HANDLED;
 273 }
 274
 275 static void __devexit snd_als300_remove(struct pci_dev *pci)
 276 {
 277         snd_als300_dbgcallenter();
 278         snd_card_free(pci_get_drvdata(pci));
 279         pci_set_drvdata(pci, NULL);
 280         snd_als300_dbgcallleave();
 281 }
 282
 283 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 284                                                         unsigned short reg)
 285 {
 286         int i;
 287         struct snd_als300 *chip = ac97->private_data;
 288
 289         for (i = 0; i < 1000; i++) {
 290                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 291                         break;
 292                 udelay(10);
 293         }
 294         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 295
 296         for (i = 0; i < 1000; i++) {
 297                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 298                         break;
 299                 udelay(10);
 300         }
 301         return inw(chip->port+AC97_READ);
 302 }
 303
 304 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 305                                 unsigned short reg, unsigned short val)
 306 {
 307         int i;
 308         struct snd_als300 *chip = ac97->private_data;
 309
 310         for (i = 0; i < 1000; i++) {
 311                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 312                         break;
 313                 udelay(10);
 314         }
 315         outl((reg << 24) | val, chip->port+AC97_ACCESS);
 316 }
 317
 318 static int snd_als300_ac97(struct snd_als300 *chip)
 319 {
 320         struct snd_ac97_bus *bus;
 321         struct snd_ac97_template ac97;
 322         int err;
 323         static struct snd_ac97_bus_ops ops = {
 324                 .write = snd_als300_ac97_write,
 325                 .read = snd_als300_ac97_read,
 326         };
 327
 328         snd_als300_dbgcallenter();
 329         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 330                 return err;
 331
 332         memset(&ac97, 0, sizeof(ac97));
 333         ac97.private_data = chip;
 334
 335         snd_als300_dbgcallleave();
 336         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 337 }
 338
 339 /* hardware definition
 340  *
 341  * In AC97 mode, we always use 48k/16bit/stereo.
 342  * Any request to change data type is ignored by
 343  * the card when it is running outside of legacy
 344  * mode.
 345  */
 346 static struct snd_pcm_hardware snd_als300_playback_hw =
 347 {
 348         .info =                 (SNDRV_PCM_INFO_MMAP |
 349                                 SNDRV_PCM_INFO_INTERLEAVED |
 350                                 SNDRV_PCM_INFO_PAUSE |
 351                                 SNDRV_PCM_INFO_MMAP_VALID),
 352         .formats =              SNDRV_PCM_FMTBIT_S16,
 353         .rates =                SNDRV_PCM_RATE_48000,
 354         .rate_min =             48000,
 355         .rate_max =             48000,
 356         .channels_min =         2,
 357         .channels_max =         2,
 358         .buffer_bytes_max =     64 * 1024,
 359         .period_bytes_min =     64,
 360         .period_bytes_max =     32 * 1024,
 361         .periods_min =          2,
 362         .periods_max =          2,
 363 };
 364
 365 static struct snd_pcm_hardware snd_als300_capture_hw =
 366 {
 367         .info =                 (SNDRV_PCM_INFO_MMAP |
 368                                 SNDRV_PCM_INFO_INTERLEAVED |
 369                                 SNDRV_PCM_INFO_PAUSE |
 370                                 SNDRV_PCM_INFO_MMAP_VALID),
 371         .formats =              SNDRV_PCM_FMTBIT_S16,
 372         .rates =                SNDRV_PCM_RATE_48000,
 373         .rate_min =             48000,
 374         .rate_max =             48000,
 375         .channels_min =         2,
 376         .channels_max =         2,
 377         .buffer_bytes_max =     64 * 1024,
 378         .period_bytes_min =     64,
 379         .period_bytes_max =     32 * 1024,
 380         .periods_min =          2,
 381         .periods_max =          2,
 382 };
 383
 384 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 385 {
 386         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 387         struct snd_pcm_runtime *runtime = substream->runtime;
 388         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 389                                                                 GFP_KERNEL);
 390
 391         snd_als300_dbgcallenter();
 392         chip->playback_substream = substream;
 393         runtime->hw = snd_als300_playback_hw;
 394         runtime->private_data = data;
 395         data->control_register = PLAYBACK_CONTROL;
 396         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 397         snd_als300_dbgcallleave();
 398         return 0;
 399 }
 400
 401 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 402 {
 403         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 404         struct snd_als300_substream_data *data;
 405
 406         data = substream->runtime->private_data;
 407         snd_als300_dbgcallenter();
 408         kfree(data);
 409         chip->playback_substream = NULL;
 410         snd_pcm_lib_free_pages(substream);
 411         snd_als300_dbgcallleave();
 412         return 0;
 413 }
 414
 415 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 416 {
 417         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 418         struct snd_pcm_runtime *runtime = substream->runtime;
 419         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 420                                                                 GFP_KERNEL);
 421
 422         snd_als300_dbgcallenter();
 423         chip->capture_substream = substream;
 424         runtime->hw = snd_als300_capture_hw;
 425         runtime->private_data = data;
 426         data->control_register = RECORD_CONTROL;
 427         data->block_counter_register = RECORD_BLOCK_COUNTER;
 428         snd_als300_dbgcallleave();
 429         return 0;
 430 }
 431
 432 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 433 {
 434         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 435         struct snd_als300_substream_data *data;
 436
 437         data = substream->runtime->private_data;
 438         snd_als300_dbgcallenter();
 439         kfree(data);
 440         chip->capture_substream = NULL;
 441         snd_pcm_lib_free_pages(substream);
 442         snd_als300_dbgcallleave();
 443         return 0;
 444 }
 445
 446 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 447                                         snd_pcm_hw_params_t * hw_params)
 448 {
 449         return snd_pcm_lib_malloc_pages(substream,
 450                                         params_buffer_bytes(hw_params));
 451 }
 452
 453 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 454 {
 455         return snd_pcm_lib_free_pages(substream);
 456 }
 457
 458 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 459 {
 460         u32 tmp;
 461         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 462         struct snd_pcm_runtime *runtime = substream->runtime;
 463         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 464         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 465
 466         snd_als300_dbgcallenter();
 467         spin_lock_irq(&chip->reg_lock);
 468         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 469         tmp &= ~TRANSFER_START;
 470
 471         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 472                                                 period_bytes, buffer_bytes);
 473
 474         /* set block size */
 475         tmp &= 0xffff0000;
 476         tmp |= period_bytes - 1;
 477         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 478
 479         /* set dma area */
 480         snd_als300_gcr_write(chip->port, PLAYBACK_START,
 481                                         runtime->dma_addr);
 482         snd_als300_gcr_write(chip->port, PLAYBACK_END,
 483                                         runtime->dma_addr + buffer_bytes - 1);
 484         spin_unlock_irq(&chip->reg_lock);
 485         snd_als300_dbgcallleave();
 486         return 0;
 487 }
 488
 489 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 490 {
 491         u32 tmp;
 492         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 493         struct snd_pcm_runtime *runtime = substream->runtime;
 494         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 495         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 496
 497         snd_als300_dbgcallenter();
 498         spin_lock_irq(&chip->reg_lock);
 499         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 500         tmp &= ~TRANSFER_START;
 501
 502         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 503                                                         buffer_bytes);
 504
 505         /* set block size */
 506         tmp &= 0xffff0000;
 507         tmp |= period_bytes - 1;
 508
 509         /* set dma area */
 510         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 511         snd_als300_gcr_write(chip->port, RECORD_START,
 512                                         runtime->dma_addr);
 513         snd_als300_gcr_write(chip->port, RECORD_END,
 514                                         runtime->dma_addr + buffer_bytes - 1);
 515         spin_unlock_irq(&chip->reg_lock);
 516         snd_als300_dbgcallleave();
 517         return 0;
 518 }
 519
 520 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 521 {
 522         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 523         u32 tmp;
 524         struct snd_als300_substream_data *data;
 525         unsigned short reg;
 526         int ret = 0;
 527
 528         data = substream->runtime->private_data;
 529         reg = data->control_register;
 530
 531         snd_als300_dbgcallenter();
 532         spin_lock(&chip->reg_lock);
 533         switch (cmd) {
 534         case SNDRV_PCM_TRIGGER_START:
 535         case SNDRV_PCM_TRIGGER_RESUME:
 536                 tmp = snd_als300_gcr_read(chip->port, reg);
 537                 data->period_flipflop = 1;
 538                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 539                 snd_als300_dbgplay("TRIGGER START\n");
 540                 break;
 541         case SNDRV_PCM_TRIGGER_STOP:
 542         case SNDRV_PCM_TRIGGER_SUSPEND:
 543                 tmp = snd_als300_gcr_read(chip->port, reg);
 544                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 545                 snd_als300_dbgplay("TRIGGER STOP\n");
 546                 break;
 547         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 548                 tmp = snd_als300_gcr_read(chip->port, reg);
 549                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 550                 snd_als300_dbgplay("TRIGGER PAUSE\n");
 551                 break;
 552         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 553                 tmp = snd_als300_gcr_read(chip->port, reg);
 554                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 555                 snd_als300_dbgplay("TRIGGER RELEASE\n");
 556                 break;
 557         default:
 558                 snd_als300_dbgplay("TRIGGER INVALID\n");
 559                 ret = -EINVAL;
 560         }
 561         spin_unlock(&chip->reg_lock);
 562         snd_als300_dbgcallleave();
 563         return ret;
 564 }
 565
 566 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 567 {
 568         u16 current_ptr;
 569         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 570         struct snd_als300_substream_data *data;
 571         unsigned short period_bytes;
 572
 573         data = substream->runtime->private_data;
 574         period_bytes = snd_pcm_lib_period_bytes(substream);
 575
 576         snd_als300_dbgcallenter();
 577         spin_lock(&chip->reg_lock);
 578         current_ptr = (u16) snd_als300_gcr_read(chip->port,
 579                                         data->block_counter_register) + 4;
 580         spin_unlock(&chip->reg_lock);
 581         if (current_ptr > period_bytes)
 582                 current_ptr = 0;
 583         else
 584                 current_ptr = period_bytes - current_ptr;
 585
 586         if (data->period_flipflop == 0)
 587                 current_ptr += period_bytes;
 588         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 589         snd_als300_dbgcallleave();
 590         return bytes_to_frames(substream->runtime, current_ptr);
 591 }
 592
 593 static struct snd_pcm_ops snd_als300_playback_ops = {
 594         .open =         snd_als300_playback_open,
 595         .close =        snd_als300_playback_close,
 596         .ioctl =        snd_pcm_lib_ioctl,
 597         .hw_params =    snd_als300_pcm_hw_params,
 598         .hw_free =      snd_als300_pcm_hw_free,
 599         .prepare =      snd_als300_playback_prepare,
 600         .trigger =      snd_als300_trigger,
 601         .pointer =      snd_als300_pointer,
 602 };
 603
 604 static struct snd_pcm_ops snd_als300_capture_ops = {
 605         .open =         snd_als300_capture_open,
 606         .close =        snd_als300_capture_close,
 607         .ioctl =        snd_pcm_lib_ioctl,
 608         .hw_params =    snd_als300_pcm_hw_params,
 609         .hw_free =      snd_als300_pcm_hw_free,
 610         .prepare =      snd_als300_capture_prepare,
 611         .trigger =      snd_als300_trigger,
 612         .pointer =      snd_als300_pointer,
 613 };
 614
 615 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 616 {
 617         struct snd_pcm *pcm;
 618         int err;
 619
 620         snd_als300_dbgcallenter();
 621         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 622         if (err < 0)
 623                 return err;
 624         pcm->private_data = chip;
 625         strcpy(pcm->name, "ALS300");
 626         chip->pcm = pcm;
 627
 628         /* set operators */
 629         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 630                                 &snd_als300_playback_ops);
 631         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 632                                 &snd_als300_capture_ops);
 633
 634         /* pre-allocation of buffers */
 635         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 636         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 637         snd_als300_dbgcallleave();
 638         return 0;
 639 }
 640
 641 static void snd_als300_init(struct snd_als300 *chip)
 642 {
 643         unsigned long flags;
 644         u32 tmp;
 645
 646         snd_als300_dbgcallenter();
 647         spin_lock_irqsave(&chip->reg_lock, flags);
 648         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 649                                                                 & 0x0000000F;
 650         /* Setup DRAM */
 651         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 652         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 653                                                 (tmp | DRAM_MODE_2)
 654                                                 & ~WRITE_TRANS_START);
 655
 656         /* Enable IRQ output */
 657         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 658
 659         /* Unmute hardware devices so their outputs get routed to
 660          * the onboard mixer */
 661         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 662         snd_als300_gcr_write(chip->port, MISC_CONTROL,
 663                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 664
 665         /* Reset volumes */
 666         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 667
 668         /* Make sure playback transfer is stopped */
 669         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 670         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 671                         tmp & ~TRANSFER_START);
 672         spin_unlock_irqrestore(&chip->reg_lock, flags);
 673         snd_als300_dbgcallleave();
 674 }
 675
 676 static int __devinit snd_als300_create(snd_card_t *card,
 677                                        struct pci_dev *pci, int chip_type,
 678                                        struct snd_als300 **rchip)
 679 {
 680         struct snd_als300 *chip;
 681         void *irq_handler;
 682         int err;
 683
 684         static snd_device_ops_t ops = {
 685                 .dev_free = snd_als300_dev_free,
 686         };
 687         *rchip = NULL;
 688
 689         snd_als300_dbgcallenter();
 690         if ((err = pci_enable_device(pci)) < 0)
 691                 return err;
 692
 693         if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
 694                 pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
 695                 printk(KERN_ERR "error setting 28bit DMA mask\n");
 696                 pci_disable_device(pci);
 697                 return -ENXIO;
 698         }
 699         pci_set_master(pci);
 700
 701         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 702         if (chip == NULL) {
 703                 pci_disable_device(pci);
 704                 return -ENOMEM;
 705         }
 706
 707         chip->card = card;
 708         chip->pci = pci;
 709         chip->irq = -1;
 710         chip->chip_type = chip_type;
 711         spin_lock_init(&chip->reg_lock);
 712
 713         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 714                 kfree(chip);
 715                 pci_disable_device(pci);
 716                 return err;
 717         }
 718         chip->port = pci_resource_start(pci, 0);
 719
 720         if (chip->chip_type == DEVICE_ALS300_PLUS)
 721                 irq_handler = snd_als300plus_interrupt;
 722         else
 723                 irq_handler = snd_als300_interrupt;
 724
 725         if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
 726                         card->shortname, chip)) {
 727                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 728                 snd_als300_free(chip);
 729                 return -EBUSY;
 730         }
 731         chip->irq = pci->irq;
 732
 733
 734         snd_als300_init(chip);
 735
 736         if (snd_als300_ac97(chip) < 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         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 816
 817         if (card == NULL)
 818                 return -ENOMEM;
 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)