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 <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/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     1
  91 #define DEBUG_PLAY_REC  1
  92
  93 #if DEBUG_CALLS
  94 #define snd_als300_dbgcalls(format, args...) printk(format, ##args)
  95 #define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __FUNCTION__)
  96 #define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __FUNCTION__)
  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 struct pci_device_id 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, (void *)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                                                 struct pt_regs *regs)
 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                                                 struct pt_regs *regs)
 240 {
 241         u8 general, mpu, dram;
 242         struct snd_als300 *chip = dev_id;
 243         struct snd_als300_substream_data *data;
 244
 245         general = inb(chip->port+ALS300P_IRQ_STATUS);
 246         mpu = inb(chip->port+MPU_IRQ_STATUS);
 247         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 248
 249         /* shared IRQ, for different device?? Exit ASAP! */
 250         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 251                 return IRQ_NONE;
 252
 253         if (general & IRQ_PLAYBACK) {
 254                 if (chip->pcm && chip->playback_substream) {
 255                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 256                         data = chip->playback_substream->runtime->private_data;
 257                         data->period_flipflop ^= 1;
 258                         snd_pcm_period_elapsed(chip->playback_substream);
 259                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 260                 }
 261         }
 262         if (general & IRQ_CAPTURE) {
 263                 if (chip->pcm && chip->capture_substream) {
 264                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 265                         data = chip->capture_substream->runtime->private_data;
 266                         data->period_flipflop ^= 1;
 267                         snd_pcm_period_elapsed(chip->capture_substream);
 268                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 269                 }
 270         }
 271         /* FIXME: Ack other interrupt types. Not important right now as
 272          * those other devices aren't enabled. */
 273         return IRQ_HANDLED;
 274 }
 275
 276 static void __devexit snd_als300_remove(struct pci_dev *pci)
 277 {
 278         snd_als300_dbgcallenter();
 279         snd_card_free(pci_get_drvdata(pci));
 280         pci_set_drvdata(pci, NULL);
 281         snd_als300_dbgcallleave();
 282 }
 283
 284 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 285                                                         unsigned short reg)
 286 {
 287         int i;
 288         struct snd_als300 *chip = ac97->private_data;
 289
 290         for (i = 0; i < 1000; i++) {
 291                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 292                         break;
 293                 udelay(10);
 294         }
 295         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 296
 297         for (i = 0; i < 1000; i++) {
 298                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 299                         break;
 300                 udelay(10);
 301         }
 302         return inw(chip->port+AC97_READ);
 303 }
 304
 305 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 306                                 unsigned short reg, unsigned short val)
 307 {
 308         int i;
 309         struct snd_als300 *chip = ac97->private_data;
 310
 311         for (i = 0; i < 1000; i++) {
 312                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 313                         break;
 314                 udelay(10);
 315         }
 316         outl((reg << 24) | val, chip->port+AC97_ACCESS);
 317 }
 318
 319 static int snd_als300_ac97(struct snd_als300 *chip)
 320 {
 321         struct snd_ac97_bus *bus;
 322         struct snd_ac97_template ac97;
 323         int err;
 324         static struct snd_ac97_bus_ops ops = {
 325                 .write = snd_als300_ac97_write,
 326                 .read = snd_als300_ac97_read,
 327         };
 328
 329         snd_als300_dbgcallenter();
 330         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 331                 return err;
 332
 333         memset(&ac97, 0, sizeof(ac97));
 334         ac97.private_data = chip;
 335
 336         snd_als300_dbgcallleave();
 337         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 338 }
 339
 340 /* hardware definition
 341  *
 342  * In AC97 mode, we always use 48k/16bit/stereo.
 343  * Any request to change data type is ignored by
 344  * the card when it is running outside of legacy
 345  * mode.
 346  */
 347 static struct snd_pcm_hardware snd_als300_playback_hw =
 348 {
 349         .info =                 (SNDRV_PCM_INFO_MMAP |
 350                                 SNDRV_PCM_INFO_INTERLEAVED |
 351                                 SNDRV_PCM_INFO_PAUSE |
 352                                 SNDRV_PCM_INFO_MMAP_VALID),
 353         .formats =              SNDRV_PCM_FMTBIT_S16,
 354         .rates =                SNDRV_PCM_RATE_48000,
 355         .rate_min =             48000,
 356         .rate_max =             48000,
 357         .channels_min =         2,
 358         .channels_max =         2,
 359         .buffer_bytes_max =     64 * 1024,
 360         .period_bytes_min =     64,
 361         .period_bytes_max =     32 * 1024,
 362         .periods_min =          2,
 363         .periods_max =          2,
 364 };
 365
 366 static struct snd_pcm_hardware snd_als300_capture_hw =
 367 {
 368         .info =                 (SNDRV_PCM_INFO_MMAP |
 369                                 SNDRV_PCM_INFO_INTERLEAVED |
 370                                 SNDRV_PCM_INFO_PAUSE |
 371                                 SNDRV_PCM_INFO_MMAP_VALID),
 372         .formats =              SNDRV_PCM_FMTBIT_S16,
 373         .rates =                SNDRV_PCM_RATE_48000,
 374         .rate_min =             48000,
 375         .rate_max =             48000,
 376         .channels_min =         2,
 377         .channels_max =         2,
 378         .buffer_bytes_max =     64 * 1024,
 379         .period_bytes_min =     64,
 380         .period_bytes_max =     32 * 1024,
 381         .periods_min =          2,
 382         .periods_max =          2,
 383 };
 384
 385 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 386 {
 387         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 388         struct snd_pcm_runtime *runtime = substream->runtime;
 389         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 390                                                                 GFP_KERNEL);
 391
 392         snd_als300_dbgcallenter();
 393         chip->playback_substream = substream;
 394         runtime->hw = snd_als300_playback_hw;
 395         runtime->private_data = data;
 396         data->control_register = PLAYBACK_CONTROL;
 397         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 398         snd_als300_dbgcallleave();
 399         return 0;
 400 }
 401
 402 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 403 {
 404         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 405         struct snd_als300_substream_data *data;
 406
 407         data = substream->runtime->private_data;
 408         snd_als300_dbgcallenter();
 409         kfree(data);
 410         chip->playback_substream = NULL;
 411         snd_pcm_lib_free_pages(substream);
 412         snd_als300_dbgcallleave();
 413         return 0;
 414 }
 415
 416 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 417 {
 418         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 419         struct snd_pcm_runtime *runtime = substream->runtime;
 420         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 421                                                                 GFP_KERNEL);
 422
 423         snd_als300_dbgcallenter();
 424         chip->capture_substream = substream;
 425         runtime->hw = snd_als300_capture_hw;
 426         runtime->private_data = data;
 427         data->control_register = RECORD_CONTROL;
 428         data->block_counter_register = RECORD_BLOCK_COUNTER;
 429         snd_als300_dbgcallleave();
 430         return 0;
 431 }
 432
 433 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 434 {
 435         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 436         struct snd_als300_substream_data *data;
 437
 438         data = substream->runtime->private_data;
 439         snd_als300_dbgcallenter();
 440         kfree(data);
 441         chip->capture_substream = NULL;
 442         snd_pcm_lib_free_pages(substream);
 443         snd_als300_dbgcallleave();
 444         return 0;
 445 }
 446
 447 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 448                                         snd_pcm_hw_params_t * hw_params)
 449 {
 450         return snd_pcm_lib_malloc_pages(substream,
 451                                         params_buffer_bytes(hw_params));
 452 }
 453
 454 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 455 {
 456         return snd_pcm_lib_free_pages(substream);
 457 }
 458
 459 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 460 {
 461         u32 tmp;
 462         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 463         struct snd_pcm_runtime *runtime = substream->runtime;
 464         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 465         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 466
 467         snd_als300_dbgcallenter();
 468         spin_lock_irq(&chip->reg_lock);
 469         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 470         tmp &= ~TRANSFER_START;
 471
 472         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 473                                                 period_bytes, buffer_bytes);
 474
 475         /* set block size */
 476         tmp &= 0xffff0000;
 477         tmp |= period_bytes - 1;
 478         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 479
 480         /* set dma area */
 481         snd_als300_gcr_write(chip->port, PLAYBACK_START,
 482                                         runtime->dma_addr);
 483         snd_als300_gcr_write(chip->port, PLAYBACK_END,
 484                                         runtime->dma_addr + buffer_bytes - 1);
 485         spin_unlock_irq(&chip->reg_lock);
 486         snd_als300_dbgcallleave();
 487         return 0;
 488 }
 489
 490 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 491 {
 492         u32 tmp;
 493         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 494         struct snd_pcm_runtime *runtime = substream->runtime;
 495         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 496         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 497
 498         snd_als300_dbgcallenter();
 499         spin_lock_irq(&chip->reg_lock);
 500         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 501         tmp &= ~TRANSFER_START;
 502
 503         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 504                                                         buffer_bytes);
 505
 506         /* set block size */
 507         tmp &= 0xffff0000;
 508         tmp |= period_bytes - 1;
 509
 510         /* set dma area */
 511         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 512         snd_als300_gcr_write(chip->port, RECORD_START,
 513                                         runtime->dma_addr);
 514         snd_als300_gcr_write(chip->port, RECORD_END,
 515                                         runtime->dma_addr + buffer_bytes - 1);
 516         spin_unlock_irq(&chip->reg_lock);
 517         snd_als300_dbgcallleave();
 518         return 0;
 519 }
 520
 521 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 522 {
 523         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 524         u32 tmp;
 525         struct snd_als300_substream_data *data;
 526         unsigned short reg;
 527         int ret = 0;
 528
 529         data = substream->runtime->private_data;
 530         reg = data->control_register;
 531
 532         snd_als300_dbgcallenter();
 533         spin_lock(&chip->reg_lock);
 534         switch (cmd) {
 535         case SNDRV_PCM_TRIGGER_START:
 536         case SNDRV_PCM_TRIGGER_RESUME:
 537                 tmp = snd_als300_gcr_read(chip->port, reg);
 538                 data->period_flipflop = 1;
 539                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 540                 snd_als300_dbgplay("TRIGGER START\n");
 541                 break;
 542         case SNDRV_PCM_TRIGGER_STOP:
 543         case SNDRV_PCM_TRIGGER_SUSPEND:
 544                 tmp = snd_als300_gcr_read(chip->port, reg);
 545                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 546                 snd_als300_dbgplay("TRIGGER STOP\n");
 547                 break;
 548         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 549                 tmp = snd_als300_gcr_read(chip->port, reg);
 550                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 551                 snd_als300_dbgplay("TRIGGER PAUSE\n");
 552                 break;
 553         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 554                 tmp = snd_als300_gcr_read(chip->port, reg);
 555                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 556                 snd_als300_dbgplay("TRIGGER RELEASE\n");
 557                 break;
 558         default:
 559                 snd_als300_dbgplay("TRIGGER INVALID\n");
 560                 ret = -EINVAL;
 561         }
 562         spin_unlock(&chip->reg_lock);
 563         snd_als300_dbgcallleave();
 564         return ret;
 565 }
 566
 567 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 568 {
 569         u16 current_ptr;
 570         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 571         struct snd_als300_substream_data *data;
 572         unsigned short period_bytes;
 573
 574         data = substream->runtime->private_data;
 575         period_bytes = snd_pcm_lib_period_bytes(substream);
 576
 577         snd_als300_dbgcallenter();
 578         spin_lock(&chip->reg_lock);
 579         current_ptr = (u16) snd_als300_gcr_read(chip->port,
 580                                         data->block_counter_register) + 4;
 581         spin_unlock(&chip->reg_lock);
 582         if (current_ptr > period_bytes)
 583                 current_ptr = 0;
 584         else
 585                 current_ptr = period_bytes - current_ptr;
 586
 587         if (data->period_flipflop == 0)
 588                 current_ptr += period_bytes;
 589         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 590         snd_als300_dbgcallleave();
 591         return bytes_to_frames(substream->runtime, current_ptr);
 592 }
 593
 594 static struct snd_pcm_ops snd_als300_playback_ops = {
 595         .open =         snd_als300_playback_open,
 596         .close =        snd_als300_playback_close,
 597         .ioctl =        snd_pcm_lib_ioctl,
 598         .hw_params =    snd_als300_pcm_hw_params,
 599         .hw_free =      snd_als300_pcm_hw_free,
 600         .prepare =      snd_als300_playback_prepare,
 601         .trigger =      snd_als300_trigger,
 602         .pointer =      snd_als300_pointer,
 603 };
 604
 605 static struct snd_pcm_ops snd_als300_capture_ops = {
 606         .open =         snd_als300_capture_open,
 607         .close =        snd_als300_capture_close,
 608         .ioctl =        snd_pcm_lib_ioctl,
 609         .hw_params =    snd_als300_pcm_hw_params,
 610         .hw_free =      snd_als300_pcm_hw_free,
 611         .prepare =      snd_als300_capture_prepare,
 612         .trigger =      snd_als300_trigger,
 613         .pointer =      snd_als300_pointer,
 614 };
 615
 616 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 617 {
 618         struct snd_pcm *pcm;
 619         int err;
 620
 621         snd_als300_dbgcallenter();
 622         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 623         if (err < 0)
 624                 return err;
 625         pcm->private_data = chip;
 626         strcpy(pcm->name, "ALS300");
 627         chip->pcm = pcm;
 628
 629         /* set operators */
 630         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 631                                 &snd_als300_playback_ops);
 632         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 633                                 &snd_als300_capture_ops);
 634
 635         /* pre-allocation of buffers */
 636         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 637         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 638         snd_als300_dbgcallleave();
 639         return 0;
 640 }
 641
 642 static void snd_als300_init(struct snd_als300 *chip)
 643 {
 644         unsigned long flags;
 645         u32 tmp;
 646
 647         snd_als300_dbgcallenter();
 648         spin_lock_irqsave(&chip->reg_lock, flags);
 649         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 650                                                                 & 0x0000000F;
 651         /* Setup DRAM */
 652         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 653         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 654                                                 (tmp | DRAM_MODE_2)
 655                                                 & ~WRITE_TRANS_START);
 656
 657         /* Enable IRQ output */
 658         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 659
 660         /* Unmute hardware devices so their outputs get routed to
 661          * the onboard mixer */
 662         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 663         snd_als300_gcr_write(chip->port, MISC_CONTROL,
 664                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 665
 666         /* Reset volumes */
 667         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 668
 669         /* Make sure playback transfer is stopped */
 670         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 671         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 672                         tmp & ~TRANSFER_START);
 673         spin_unlock_irqrestore(&chip->reg_lock, flags);
 674         snd_als300_dbgcallleave();
 675 }
 676
 677 static int __devinit snd_als300_create(snd_card_t *card,
 678                                        struct pci_dev *pci, int chip_type,
 679                                        struct snd_als300 **rchip)
 680 {
 681         struct snd_als300 *chip;
 682         void *irq_handler;
 683         int err;
 684
 685         static snd_device_ops_t ops = {
 686                 .dev_free = snd_als300_dev_free,
 687         };
 688         *rchip = NULL;
 689
 690         snd_als300_dbgcallenter();
 691         if ((err = pci_enable_device(pci)) < 0)
 692                 return err;
 693
 694         if (pci_set_dma_mask(pci, 0x0fffffff) < 0 ||
 695                 pci_set_consistent_dma_mask(pci, 0x0fffffff) < 0) {
 696                 printk(KERN_ERR "error setting 28bit DMA mask\n");
 697                 pci_disable_device(pci);
 698                 return -ENXIO;
 699         }
 700         pci_set_master(pci);
 701
 702         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 703         if (chip == NULL) {
 704                 pci_disable_device(pci);
 705                 return -ENOMEM;
 706         }
 707
 708         chip->card = card;
 709         chip->pci = pci;
 710         chip->irq = -1;
 711         chip->chip_type = chip_type;
 712         spin_lock_init(&chip->reg_lock);
 713
 714         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 715                 kfree(chip);
 716                 pci_disable_device(pci);
 717                 return err;
 718         }
 719         chip->port = pci_resource_start(pci, 0);
 720
 721         if (chip->chip_type == DEVICE_ALS300_PLUS)
 722                 irq_handler = snd_als300plus_interrupt;
 723         else
 724                 irq_handler = snd_als300_interrupt;
 725
 726         if (request_irq(pci->irq, irq_handler, SA_INTERRUPT|SA_SHIRQ,
 727                                         card->shortname, (void *)chip)) {
 728                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 729                 snd_als300_free(chip);
 730                 return -EBUSY;
 731         }
 732         chip->irq = pci->irq;
 733
 734
 735         snd_als300_init(chip);
 736
 737         if (snd_als300_ac97(chip) < 0) {
 738                 snd_printk(KERN_WARNING "Could not create ac97\n");
 739                 snd_als300_free(chip);
 740                 return err;
 741         }
 742
 743         if ((err = snd_als300_new_pcm(chip)) < 0) {
 744                 snd_printk(KERN_WARNING "Could not create PCM\n");
 745                 snd_als300_free(chip);
 746                 return err;
 747         }
 748
 749         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 750                                                 chip, &ops)) < 0) {
 751                 snd_als300_free(chip);
 752                 return err;
 753         }
 754
 755         snd_card_set_dev(card, &pci->dev);
 756
 757         *rchip = chip;
 758         snd_als300_dbgcallleave();
 759         return 0;
 760 }
 761
 762 #ifdef CONFIG_PM
 763 static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
 764 {
 765         struct snd_card *card = pci_get_drvdata(pci);
 766         struct snd_als300 *chip = card->private_data;
 767
 768         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 769         snd_pcm_suspend_all(chip->pcm);
 770         snd_ac97_suspend(chip->ac97);
 771
 772         pci_set_power_state(pci, PCI_D3hot);
 773         pci_disable_device(pci);
 774         pci_save_state(pci);
 775         return 0;
 776 }
 777
 778 static int snd_als300_resume(struct pci_dev *pci)
 779 {
 780         struct snd_card *card = pci_get_drvdata(pci);
 781         struct snd_als300 *chip = card->private_data;
 782
 783         pci_restore_state(pci);
 784         pci_enable_device(pci);
 785         pci_set_power_state(pci, PCI_D0);
 786         pci_set_master(pci);
 787
 788         snd_als300_init(chip);
 789         snd_ac97_resume(chip->ac97);
 790
 791         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 792         return 0;
 793 }
 794 #endif
 795
 796 static int __devinit snd_als300_probe(struct pci_dev *pci,
 797                              const struct pci_device_id *pci_id)
 798 {
 799         static int dev;
 800         struct snd_card *card;
 801         struct snd_als300 *chip;
 802         int err, chip_type;
 803
 804         if (dev >= SNDRV_CARDS)
 805                 return -ENODEV;
 806         if (!enable[dev]) {
 807                 dev++;
 808                 return -ENOENT;
 809         }
 810
 811         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 812
 813         if (card == NULL)
 814                 return -ENOMEM;
 815
 816         chip_type = pci_id->driver_data;
 817
 818         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 819                 snd_card_free(card);
 820                 return err;
 821         }
 822         card->private_data = chip;
 823
 824         strcpy(card->driver, "ALS300");
 825         if (chip->chip_type == DEVICE_ALS300_PLUS)
 826                 /* don't know much about ALS300+ yet
 827                  * print revision number for now */
 828                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 829         else
 830                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 831                                                         chip->revision - 1);
 832         sprintf(card->longname, "%s at 0x%lx irq %i",
 833                                 card->shortname, chip->port, chip->irq);
 834
 835         if ((err = snd_card_register(card)) < 0) {
 836                 snd_card_free(card);
 837                 return err;
 838         }
 839         pci_set_drvdata(pci, card);
 840         dev++;
 841         return 0;
 842 }
 843
 844 static struct pci_driver driver = {
 845         .name = "ALS300",
 846         .id_table = snd_als300_ids,
 847         .probe = snd_als300_probe,
 848         .remove = __devexit_p(snd_als300_remove),
 849 #ifdef CONFIG_PM
 850         .suspend = snd_als300_suspend,
 851         .resume = snd_als300_resume,
 852 #endif
 853 };
 854
 855 static int __init alsa_card_als300_init(void)
 856 {
 857         return pci_register_driver(&driver);
 858 }
 859
 860 static void __exit alsa_card_als300_exit(void)
 861 {
 862         pci_unregister_driver(&driver);
 863 }
 864
 865 module_init(alsa_card_als300_init)
 866 module_exit(alsa_card_als300_exit)