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