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/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[] __devinitdata = {
 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, (void *)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                                                 struct pt_regs *regs)
 209 {
 210         u8 status;
 211         struct snd_als300 *chip = dev_id;
 212         struct snd_als300_substream_data *data;
 213
 214         status = inb(chip->port+ALS300_IRQ_STATUS);
 215         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
 216                 return IRQ_NONE;
 217
 218         /* ACK everything ASAP */
 219         outb(status, chip->port+ALS300_IRQ_STATUS);
 220         if (status & IRQ_PLAYBACK) {
 221                 if (chip->pcm && chip->playback_substream) {
 222                         data = chip->playback_substream->runtime->private_data;
 223                         data->period_flipflop ^= 1;
 224                         snd_pcm_period_elapsed(chip->playback_substream);
 225                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 226                 }
 227         }
 228         if (status & IRQ_CAPTURE) {
 229                 if (chip->pcm && chip->capture_substream) {
 230                         data = chip->capture_substream->runtime->private_data;
 231                         data->period_flipflop ^= 1;
 232                         snd_pcm_period_elapsed(chip->capture_substream);
 233                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 234                 }
 235         }
 236         return IRQ_HANDLED;
 237 }
 238
 239 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id,
 240                                                 struct pt_regs *regs)
 241 {
 242         u8 general, mpu, dram;
 243         struct snd_als300 *chip = dev_id;
 244         struct snd_als300_substream_data *data;
 245
 246         general = inb(chip->port+ALS300P_IRQ_STATUS);
 247         mpu = inb(chip->port+MPU_IRQ_STATUS);
 248         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 249
 250         /* shared IRQ, for different device?? Exit ASAP! */
 251         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 252                 return IRQ_NONE;
 253
 254         if (general & IRQ_PLAYBACK) {
 255                 if (chip->pcm && chip->playback_substream) {
 256                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 257                         data = chip->playback_substream->runtime->private_data;
 258                         data->period_flipflop ^= 1;
 259                         snd_pcm_period_elapsed(chip->playback_substream);
 260                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
 261                 }
 262         }
 263         if (general & IRQ_CAPTURE) {
 264                 if (chip->pcm && chip->capture_substream) {
 265                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 266                         data = chip->capture_substream->runtime->private_data;
 267                         data->period_flipflop ^= 1;
 268                         snd_pcm_period_elapsed(chip->capture_substream);
 269                         snd_als300_dbgplay("IRQ_CAPTURE\n");
 270                 }
 271         }
 272         /* FIXME: Ack other interrupt types. Not important right now as
 273          * those other devices aren't enabled. */
 274         return IRQ_HANDLED;
 275 }
 276
 277 static void __devexit snd_als300_remove(struct pci_dev *pci)
 278 {
 279         snd_als300_dbgcallenter();
 280         snd_card_free(pci_get_drvdata(pci));
 281         pci_set_drvdata(pci, NULL);
 282         snd_als300_dbgcallleave();
 283 }
 284
 285 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 286                                                         unsigned short reg)
 287 {
 288         int i;
 289         struct snd_als300 *chip = ac97->private_data;
 290
 291         for (i = 0; i < 1000; i++) {
 292                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 293                         break;
 294                 udelay(10);
 295         }
 296         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 297
 298         for (i = 0; i < 1000; i++) {
 299                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 300                         break;
 301                 udelay(10);
 302         }
 303         return inw(chip->port+AC97_READ);
 304 }
 305
 306 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 307                                 unsigned short reg, unsigned short val)
 308 {
 309         int i;
 310         struct snd_als300 *chip = ac97->private_data;
 311
 312         for (i = 0; i < 1000; i++) {
 313                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 314                         break;
 315                 udelay(10);
 316         }
 317         outl((reg << 24) | val, chip->port+AC97_ACCESS);
 318 }
 319
 320 static int snd_als300_ac97(struct snd_als300 *chip)
 321 {
 322         struct snd_ac97_bus *bus;
 323         struct snd_ac97_template ac97;
 324         int err;
 325         static struct snd_ac97_bus_ops ops = {
 326                 .write = snd_als300_ac97_write,
 327                 .read = snd_als300_ac97_read,
 328         };
 329
 330         snd_als300_dbgcallenter();
 331         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 332                 return err;
 333
 334         memset(&ac97, 0, sizeof(ac97));
 335         ac97.private_data = chip;
 336
 337         snd_als300_dbgcallleave();
 338         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 339 }
 340
 341 /* hardware definition
 342  *
 343  * In AC97 mode, we always use 48k/16bit/stereo.
 344  * Any request to change data type is ignored by
 345  * the card when it is running outside of legacy
 346  * mode.
 347  */
 348 static struct snd_pcm_hardware snd_als300_playback_hw =
 349 {
 350         .info =                 (SNDRV_PCM_INFO_MMAP |
 351                                 SNDRV_PCM_INFO_INTERLEAVED |
 352                                 SNDRV_PCM_INFO_PAUSE |
 353                                 SNDRV_PCM_INFO_MMAP_VALID),
 354         .formats =              SNDRV_PCM_FMTBIT_S16,
 355         .rates =                SNDRV_PCM_RATE_48000,
 356         .rate_min =             48000,
 357         .rate_max =             48000,
 358         .channels_min =         2,
 359         .channels_max =         2,
 360         .buffer_bytes_max =     64 * 1024,
 361         .period_bytes_min =     64,
 362         .period_bytes_max =     32 * 1024,
 363         .periods_min =          2,
 364         .periods_max =          2,
 365 };
 366
 367 static struct snd_pcm_hardware snd_als300_capture_hw =
 368 {
 369         .info =                 (SNDRV_PCM_INFO_MMAP |
 370                                 SNDRV_PCM_INFO_INTERLEAVED |
 371                                 SNDRV_PCM_INFO_PAUSE |
 372                                 SNDRV_PCM_INFO_MMAP_VALID),
 373         .formats =              SNDRV_PCM_FMTBIT_S16,
 374         .rates =                SNDRV_PCM_RATE_48000,
 375         .rate_min =             48000,
 376         .rate_max =             48000,
 377         .channels_min =         2,
 378         .channels_max =         2,
 379         .buffer_bytes_max =     64 * 1024,
 380         .period_bytes_min =     64,
 381         .period_bytes_max =     32 * 1024,
 382         .periods_min =          2,
 383         .periods_max =          2,
 384 };
 385
 386 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 387 {
 388         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 389         struct snd_pcm_runtime *runtime = substream->runtime;
 390         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 391                                                                 GFP_KERNEL);
 392
 393         snd_als300_dbgcallenter();
 394         chip->playback_substream = substream;
 395         runtime->hw = snd_als300_playback_hw;
 396         runtime->private_data = data;
 397         data->control_register = PLAYBACK_CONTROL;
 398         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 399         snd_als300_dbgcallleave();
 400         return 0;
 401 }
 402
 403 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 404 {
 405         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 406         struct snd_als300_substream_data *data;
 407
 408         data = substream->runtime->private_data;
 409         snd_als300_dbgcallenter();
 410         kfree(data);
 411         chip->playback_substream = NULL;
 412         snd_pcm_lib_free_pages(substream);
 413         snd_als300_dbgcallleave();
 414         return 0;
 415 }
 416
 417 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 418 {
 419         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 420         struct snd_pcm_runtime *runtime = substream->runtime;
 421         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 422                                                                 GFP_KERNEL);
 423
 424         snd_als300_dbgcallenter();
 425         chip->capture_substream = substream;
 426         runtime->hw = snd_als300_capture_hw;
 427         runtime->private_data = data;
 428         data->control_register = RECORD_CONTROL;
 429         data->block_counter_register = RECORD_BLOCK_COUNTER;
 430         snd_als300_dbgcallleave();
 431         return 0;
 432 }
 433
 434 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 435 {
 436         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 437         struct snd_als300_substream_data *data;
 438
 439         data = substream->runtime->private_data;
 440         snd_als300_dbgcallenter();
 441         kfree(data);
 442         chip->capture_substream = NULL;
 443         snd_pcm_lib_free_pages(substream);
 444         snd_als300_dbgcallleave();
 445         return 0;
 446 }
 447
 448 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 449                                         snd_pcm_hw_params_t * hw_params)
 450 {
 451         return snd_pcm_lib_malloc_pages(substream,
 452                                         params_buffer_bytes(hw_params));
 453 }
 454
 455 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 456 {
 457         return snd_pcm_lib_free_pages(substream);
 458 }
 459
 460 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 461 {
 462         u32 tmp;
 463         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 464         struct snd_pcm_runtime *runtime = substream->runtime;
 465         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 466         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 467
 468         snd_als300_dbgcallenter();
 469         spin_lock_irq(&chip->reg_lock);
 470         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 471         tmp &= ~TRANSFER_START;
 472
 473         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 474                                                 period_bytes, buffer_bytes);
 475
 476         /* set block size */
 477         tmp &= 0xffff0000;
 478         tmp |= period_bytes - 1;
 479         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 480
 481         /* set dma area */
 482         snd_als300_gcr_write(chip->port, PLAYBACK_START,
 483                                         runtime->dma_addr);
 484         snd_als300_gcr_write(chip->port, PLAYBACK_END,
 485                                         runtime->dma_addr + buffer_bytes - 1);
 486         spin_unlock_irq(&chip->reg_lock);
 487         snd_als300_dbgcallleave();
 488         return 0;
 489 }
 490
 491 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 492 {
 493         u32 tmp;
 494         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 495         struct snd_pcm_runtime *runtime = substream->runtime;
 496         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 497         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 498
 499         snd_als300_dbgcallenter();
 500         spin_lock_irq(&chip->reg_lock);
 501         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 502         tmp &= ~TRANSFER_START;
 503
 504         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 505                                                         buffer_bytes);
 506
 507         /* set block size */
 508         tmp &= 0xffff0000;
 509         tmp |= period_bytes - 1;
 510
 511         /* set dma area */
 512         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 513         snd_als300_gcr_write(chip->port, RECORD_START,
 514                                         runtime->dma_addr);
 515         snd_als300_gcr_write(chip->port, RECORD_END,
 516                                         runtime->dma_addr + buffer_bytes - 1);
 517         spin_unlock_irq(&chip->reg_lock);
 518         snd_als300_dbgcallleave();
 519         return 0;
 520 }
 521
 522 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 523 {
 524         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 525         u32 tmp;
 526         struct snd_als300_substream_data *data;
 527         unsigned short reg;
 528         int ret = 0;
 529
 530         data = substream->runtime->private_data;
 531         reg = data->control_register;
 532
 533         snd_als300_dbgcallenter();
 534         spin_lock(&chip->reg_lock);
 535         switch (cmd) {
 536         case SNDRV_PCM_TRIGGER_START:
 537         case SNDRV_PCM_TRIGGER_RESUME:
 538                 tmp = snd_als300_gcr_read(chip->port, reg);
 539                 data->period_flipflop = 1;
 540                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 541                 snd_als300_dbgplay("TRIGGER START\n");
 542                 break;
 543         case SNDRV_PCM_TRIGGER_STOP:
 544         case SNDRV_PCM_TRIGGER_SUSPEND:
 545                 tmp = snd_als300_gcr_read(chip->port, reg);
 546                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 547                 snd_als300_dbgplay("TRIGGER STOP\n");
 548                 break;
 549         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 550                 tmp = snd_als300_gcr_read(chip->port, reg);
 551                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 552                 snd_als300_dbgplay("TRIGGER PAUSE\n");
 553                 break;
 554         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 555                 tmp = snd_als300_gcr_read(chip->port, reg);
 556                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 557                 snd_als300_dbgplay("TRIGGER RELEASE\n");
 558                 break;
 559         default:
 560                 snd_als300_dbgplay("TRIGGER INVALID\n");
 561                 ret = -EINVAL;
 562         }
 563         spin_unlock(&chip->reg_lock);
 564         snd_als300_dbgcallleave();
 565         return ret;
 566 }
 567
 568 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 569 {
 570         u16 current_ptr;
 571         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 572         struct snd_als300_substream_data *data;
 573         unsigned short period_bytes;
 574
 575         data = substream->runtime->private_data;
 576         period_bytes = snd_pcm_lib_period_bytes(substream);
 577
 578         snd_als300_dbgcallenter();
 579         spin_lock(&chip->reg_lock);
 580         current_ptr = (u16) snd_als300_gcr_read(chip->port,
 581                                         data->block_counter_register) + 4;
 582         spin_unlock(&chip->reg_lock);
 583         if (current_ptr > period_bytes)
 584                 current_ptr = 0;
 585         else
 586                 current_ptr = period_bytes - current_ptr;
 587
 588         if (data->period_flipflop == 0)
 589                 current_ptr += period_bytes;
 590         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 591         snd_als300_dbgcallleave();
 592         return bytes_to_frames(substream->runtime, current_ptr);
 593 }
 594
 595 static struct snd_pcm_ops snd_als300_playback_ops = {
 596         .open =         snd_als300_playback_open,
 597         .close =        snd_als300_playback_close,
 598         .ioctl =        snd_pcm_lib_ioctl,
 599         .hw_params =    snd_als300_pcm_hw_params,
 600         .hw_free =      snd_als300_pcm_hw_free,
 601         .prepare =      snd_als300_playback_prepare,
 602         .trigger =      snd_als300_trigger,
 603         .pointer =      snd_als300_pointer,
 604 };
 605
 606 static struct snd_pcm_ops snd_als300_capture_ops = {
 607         .open =         snd_als300_capture_open,
 608         .close =        snd_als300_capture_close,
 609         .ioctl =        snd_pcm_lib_ioctl,
 610         .hw_params =    snd_als300_pcm_hw_params,
 611         .hw_free =      snd_als300_pcm_hw_free,
 612         .prepare =      snd_als300_capture_prepare,
 613         .trigger =      snd_als300_trigger,
 614         .pointer =      snd_als300_pointer,
 615 };
 616
 617 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 618 {
 619         struct snd_pcm *pcm;
 620         int err;
 621
 622         snd_als300_dbgcallenter();
 623         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 624         if (err < 0)
 625                 return err;
 626         pcm->private_data = chip;
 627         strcpy(pcm->name, "ALS300");
 628         chip->pcm = pcm;
 629
 630         /* set operators */
 631         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 632                                 &snd_als300_playback_ops);
 633         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 634                                 &snd_als300_capture_ops);
 635
 636         /* pre-allocation of buffers */
 637         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 638         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 639         snd_als300_dbgcallleave();
 640         return 0;
 641 }
 642
 643 static void snd_als300_init(struct snd_als300 *chip)
 644 {
 645         unsigned long flags;
 646         u32 tmp;
 647
 648         snd_als300_dbgcallenter();
 649         spin_lock_irqsave(&chip->reg_lock, flags);
 650         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 651                                                                 & 0x0000000F;
 652         /* Setup DRAM */
 653         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 654         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 655                                                 (tmp | DRAM_MODE_2)
 656                                                 & ~WRITE_TRANS_START);
 657
 658         /* Enable IRQ output */
 659         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 660
 661         /* Unmute hardware devices so their outputs get routed to
 662          * the onboard mixer */
 663         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 664         snd_als300_gcr_write(chip->port, MISC_CONTROL,
 665                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 666
 667         /* Reset volumes */
 668         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 669
 670         /* Make sure playback transfer is stopped */
 671         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 672         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 673                         tmp & ~TRANSFER_START);
 674         spin_unlock_irqrestore(&chip->reg_lock, flags);
 675         snd_als300_dbgcallleave();
 676 }
 677
 678 static int __devinit snd_als300_create(snd_card_t *card,
 679                                        struct pci_dev *pci, int chip_type,
 680                                        struct snd_als300 **rchip)
 681 {
 682         struct snd_als300 *chip;
 683         void *irq_handler;
 684         int err;
 685
 686         static snd_device_ops_t ops = {
 687                 .dev_free = snd_als300_dev_free,
 688         };
 689         *rchip = NULL;
 690
 691         snd_als300_dbgcallenter();
 692         if ((err = pci_enable_device(pci)) < 0)
 693                 return err;
 694
 695         if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
 696                 pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
 697                 printk(KERN_ERR "error setting 28bit DMA mask\n");
 698                 pci_disable_device(pci);
 699                 return -ENXIO;
 700         }
 701         pci_set_master(pci);
 702
 703         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 704         if (chip == NULL) {
 705                 pci_disable_device(pci);
 706                 return -ENOMEM;
 707         }
 708
 709         chip->card = card;
 710         chip->pci = pci;
 711         chip->irq = -1;
 712         chip->chip_type = chip_type;
 713         spin_lock_init(&chip->reg_lock);
 714
 715         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 716                 kfree(chip);
 717                 pci_disable_device(pci);
 718                 return err;
 719         }
 720         chip->port = pci_resource_start(pci, 0);
 721
 722         if (chip->chip_type == DEVICE_ALS300_PLUS)
 723                 irq_handler = snd_als300plus_interrupt;
 724         else
 725                 irq_handler = snd_als300_interrupt;
 726
 727         if (request_irq(pci->irq, irq_handler, SA_INTERRUPT|SA_SHIRQ,
 728                                         card->shortname, (void *)chip)) {
 729                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 730                 snd_als300_free(chip);
 731                 return -EBUSY;
 732         }
 733         chip->irq = pci->irq;
 734
 735
 736         snd_als300_init(chip);
 737
 738         if (snd_als300_ac97(chip) < 0) {
 739                 snd_printk(KERN_WARNING "Could not create ac97\n");
 740                 snd_als300_free(chip);
 741                 return err;
 742         }
 743
 744         if ((err = snd_als300_new_pcm(chip)) < 0) {
 745                 snd_printk(KERN_WARNING "Could not create PCM\n");
 746                 snd_als300_free(chip);
 747                 return err;
 748         }
 749
 750         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 751                                                 chip, &ops)) < 0) {
 752                 snd_als300_free(chip);
 753                 return err;
 754         }
 755
 756         snd_card_set_dev(card, &pci->dev);
 757
 758         *rchip = chip;
 759         snd_als300_dbgcallleave();
 760         return 0;
 761 }
 762
 763 #ifdef CONFIG_PM
 764 static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
 765 {
 766         struct snd_card *card = pci_get_drvdata(pci);
 767         struct snd_als300 *chip = card->private_data;
 768
 769         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 770         snd_pcm_suspend_all(chip->pcm);
 771         snd_ac97_suspend(chip->ac97);
 772
 773         pci_set_power_state(pci, PCI_D3hot);
 774         pci_disable_device(pci);
 775         pci_save_state(pci);
 776         return 0;
 777 }
 778
 779 static int snd_als300_resume(struct pci_dev *pci)
 780 {
 781         struct snd_card *card = pci_get_drvdata(pci);
 782         struct snd_als300 *chip = card->private_data;
 783
 784         pci_restore_state(pci);
 785         pci_enable_device(pci);
 786         pci_set_power_state(pci, PCI_D0);
 787         pci_set_master(pci);
 788
 789         snd_als300_init(chip);
 790         snd_ac97_resume(chip->ac97);
 791
 792         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 793         return 0;
 794 }
 795 #endif
 796
 797 static int __devinit snd_als300_probe(struct pci_dev *pci,
 798                              const struct pci_device_id *pci_id)
 799 {
 800         static int dev;
 801         struct snd_card *card;
 802         struct snd_als300 *chip;
 803         int err, chip_type;
 804
 805         if (dev >= SNDRV_CARDS)
 806                 return -ENODEV;
 807         if (!enable[dev]) {
 808                 dev++;
 809                 return -ENOENT;
 810         }
 811
 812         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 813
 814         if (card == NULL)
 815                 return -ENOMEM;
 816
 817         chip_type = pci_id->driver_data;
 818
 819         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 820                 snd_card_free(card);
 821                 return err;
 822         }
 823         card->private_data = chip;
 824
 825         strcpy(card->driver, "ALS300");
 826         if (chip->chip_type == DEVICE_ALS300_PLUS)
 827                 /* don't know much about ALS300+ yet
 828                  * print revision number for now */
 829                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 830         else
 831                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 832                                                         chip->revision - 1);
 833         sprintf(card->longname, "%s at 0x%lx irq %i",
 834                                 card->shortname, chip->port, chip->irq);
 835
 836         if ((err = snd_card_register(card)) < 0) {
 837                 snd_card_free(card);
 838                 return err;
 839         }
 840         pci_set_drvdata(pci, card);
 841         dev++;
 842         return 0;
 843 }
 844
 845 static struct pci_driver driver = {
 846         .name = "ALS300",
 847         .id_table = snd_als300_ids,
 848         .probe = snd_als300_probe,
 849         .remove = __devexit_p(snd_als300_remove),
 850 #ifdef CONFIG_PM
 851         .suspend = snd_als300_suspend,
 852         .resume = snd_als300_resume,
 853 #endif
 854 };
 855
 856 static int __init alsa_card_als300_init(void)
 857 {
 858         return pci_register_driver(&driver);
 859 }
 860
 861 static void __exit alsa_card_als300_exit(void)
 862 {
 863         pci_unregister_driver(&driver);
 864 }
 865
 866 module_init(alsa_card_als300_init)
 867 module_exit(alsa_card_als300_exit)