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/moduleparam.h>
  36#include <linux/pci.h>
  37#include <linux/dma-mapping.h>
  38#include <linux/interrupt.h>
  39#include <linux/slab.h>
  40
  41#include <asm/io.h>
  42
  43#include <sound/core.h>
  44#include <sound/control.h>
  45#include <sound/initval.h>
  46#include <sound/pcm.h>
  47#include <sound/pcm_params.h>
  48#include <sound/ac97_codec.h>
  49#include <sound/opl3.h>
  50
  51/* snd_als300_set_irq_flag */
  52#define IRQ_DISABLE             0
  53#define IRQ_ENABLE              1
  54
  55/* I/O port layout */
  56#define AC97_ACCESS             0x00
  57#define AC97_READ               0x04
  58#define AC97_STATUS             0x06
  59#define   AC97_DATA_AVAIL               (1<<6)
  60#define   AC97_BUSY                     (1<<7)
  61#define ALS300_IRQ_STATUS       0x07            /* ALS300 Only */
  62#define   IRQ_PLAYBACK                  (1<<3)
  63#define   IRQ_CAPTURE                   (1<<2)
  64#define GCR_DATA                0x08
  65#define GCR_INDEX               0x0C
  66#define ALS300P_DRAM_IRQ_STATUS 0x0D            /* ALS300+ Only */
  67#define MPU_IRQ_STATUS          0x0E            /* ALS300 Rev. E+, ALS300+ */
  68#define ALS300P_IRQ_STATUS      0x0F            /* ALS300+ Only */
  69
  70/* General Control Registers */
  71#define PLAYBACK_START          0x80
  72#define PLAYBACK_END            0x81
  73#define PLAYBACK_CONTROL        0x82
  74#define   TRANSFER_START                (1<<16)
  75#define   FIFO_PAUSE                    (1<<17)
  76#define RECORD_START            0x83
  77#define RECORD_END              0x84
  78#define RECORD_CONTROL          0x85
  79#define DRAM_WRITE_CONTROL      0x8B
  80#define   WRITE_TRANS_START             (1<<16)
  81#define   DRAM_MODE_2                   (1<<17)
  82#define MISC_CONTROL            0x8C
  83#define   IRQ_SET_BIT                   (1<<15)
  84#define   VMUTE_NORMAL                  (1<<20)
  85#define   MMUTE_NORMAL                  (1<<21)
  86#define MUS_VOC_VOL             0x8E
  87#define PLAYBACK_BLOCK_COUNTER  0x9A
  88#define RECORD_BLOCK_COUNTER    0x9B
  89
  90#define DEBUG_CALLS     0
  91#define DEBUG_PLAY_REC  0
  92
  93#if DEBUG_CALLS
  94#define snd_als300_dbgcalls(format, args...) printk(KERN_DEBUG format, ##args)
  95#define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)
  96#define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)
  97#else
  98#define snd_als300_dbgcalls(format, args...)
  99#define snd_als300_dbgcallenter()
 100#define snd_als300_dbgcallleave()
 101#endif
 102
 103#if DEBUG_PLAY_REC
 104#define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
 105#else
 106#define snd_als300_dbgplay(format, args...)
 107#endif          
 108
 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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 119
 120struct 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
 142struct snd_als300_substream_data {
 143        int period_flipflop;
 144        int control_register;
 145        int block_counter_register;
 146};
 147
 148static DEFINE_PCI_DEVICE_TABLE(snd_als300_ids) = {
 149        { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
 150        { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
 151        { 0, }
 152};
 153
 154MODULE_DEVICE_TABLE(pci, snd_als300_ids);
 155
 156static 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
 162static 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 */
 170static 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
 187static int snd_als300_free(struct snd_als300 *chip)
 188{
 189        snd_als300_dbgcallenter();
 190        snd_als300_set_irq_flag(chip, IRQ_DISABLE);
 191        if (chip->irq >= 0)
 192                free_irq(chip->irq, chip);
 193        pci_release_regions(chip->pci);
 194        pci_disable_device(chip->pci);
 195        kfree(chip);
 196        snd_als300_dbgcallleave();
 197        return 0;
 198}
 199
 200static 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
 206static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
 207{
 208        u8 status;
 209        struct snd_als300 *chip = dev_id;
 210        struct snd_als300_substream_data *data;
 211
 212        status = inb(chip->port+ALS300_IRQ_STATUS);
 213        if (!status) /* shared IRQ, for different device?? Exit ASAP! */
 214                return IRQ_NONE;
 215
 216        /* ACK everything ASAP */
 217        outb(status, chip->port+ALS300_IRQ_STATUS);
 218        if (status & IRQ_PLAYBACK) {
 219                if (chip->pcm && chip->playback_substream) {
 220                        data = chip->playback_substream->runtime->private_data;
 221                        data->period_flipflop ^= 1;
 222                        snd_pcm_period_elapsed(chip->playback_substream);
 223                        snd_als300_dbgplay("IRQ_PLAYBACK\n");
 224                }
 225        }
 226        if (status & IRQ_CAPTURE) {
 227                if (chip->pcm && chip->capture_substream) {
 228                        data = chip->capture_substream->runtime->private_data;
 229                        data->period_flipflop ^= 1;
 230                        snd_pcm_period_elapsed(chip->capture_substream);
 231                        snd_als300_dbgplay("IRQ_CAPTURE\n");
 232                }
 233        }
 234        return IRQ_HANDLED;
 235}
 236
 237static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
 238{
 239        u8 general, mpu, dram;
 240        struct snd_als300 *chip = dev_id;
 241        struct snd_als300_substream_data *data;
 242        
 243        general = inb(chip->port+ALS300P_IRQ_STATUS);
 244        mpu = inb(chip->port+MPU_IRQ_STATUS);
 245        dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
 246
 247        /* shared IRQ, for different device?? Exit ASAP! */
 248        if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
 249                return IRQ_NONE;
 250
 251        if (general & IRQ_PLAYBACK) {
 252                if (chip->pcm && chip->playback_substream) {
 253                        outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
 254                        data = chip->playback_substream->runtime->private_data;
 255                        data->period_flipflop ^= 1;
 256                        snd_pcm_period_elapsed(chip->playback_substream);
 257                        snd_als300_dbgplay("IRQ_PLAYBACK\n");
 258                }
 259        }
 260        if (general & IRQ_CAPTURE) {
 261                if (chip->pcm && chip->capture_substream) {
 262                        outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
 263                        data = chip->capture_substream->runtime->private_data;
 264                        data->period_flipflop ^= 1;
 265                        snd_pcm_period_elapsed(chip->capture_substream);
 266                        snd_als300_dbgplay("IRQ_CAPTURE\n");
 267                }
 268        }
 269        /* FIXME: Ack other interrupt types. Not important right now as
 270         * those other devices aren't enabled. */
 271        return IRQ_HANDLED;
 272}
 273
 274static void __devexit snd_als300_remove(struct pci_dev *pci)
 275{
 276        snd_als300_dbgcallenter();
 277        snd_card_free(pci_get_drvdata(pci));
 278        pci_set_drvdata(pci, NULL);
 279        snd_als300_dbgcallleave();
 280}
 281
 282static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 283                                                        unsigned short reg)
 284{
 285        int i;
 286        struct snd_als300 *chip = ac97->private_data;
 287
 288        for (i = 0; i < 1000; i++) {
 289                if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 290                        break;
 291                udelay(10);
 292        }
 293        outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 294
 295        for (i = 0; i < 1000; i++) {
 296                if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 297                        break;
 298                udelay(10);
 299        }
 300        return inw(chip->port+AC97_READ);
 301}
 302
 303static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 304                                unsigned short reg, unsigned short val)
 305{
 306        int i;
 307        struct snd_als300 *chip = ac97->private_data;
 308
 309        for (i = 0; i < 1000; i++) {
 310                if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 311                        break;
 312                udelay(10);
 313        }
 314        outl((reg << 24) | val, chip->port+AC97_ACCESS);
 315}
 316
 317static int snd_als300_ac97(struct snd_als300 *chip)
 318{
 319        struct snd_ac97_bus *bus;
 320        struct snd_ac97_template ac97;
 321        int err;
 322        static struct snd_ac97_bus_ops ops = {
 323                .write = snd_als300_ac97_write,
 324                .read = snd_als300_ac97_read,
 325        };
 326
 327        snd_als300_dbgcallenter();
 328        if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 329                return err;
 330
 331        memset(&ac97, 0, sizeof(ac97));
 332        ac97.private_data = chip;
 333
 334        snd_als300_dbgcallleave();
 335        return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 336}
 337
 338/* hardware definition
 339 *
 340 * In AC97 mode, we always use 48k/16bit/stereo.
 341 * Any request to change data type is ignored by
 342 * the card when it is running outside of legacy
 343 * mode.
 344 */
 345static struct snd_pcm_hardware snd_als300_playback_hw =
 346{
 347        .info =                 (SNDRV_PCM_INFO_MMAP |
 348                                SNDRV_PCM_INFO_INTERLEAVED |
 349                                SNDRV_PCM_INFO_PAUSE |
 350                                SNDRV_PCM_INFO_MMAP_VALID),
 351        .formats =              SNDRV_PCM_FMTBIT_S16,
 352        .rates =                SNDRV_PCM_RATE_48000,
 353        .rate_min =             48000,
 354        .rate_max =             48000,
 355        .channels_min =         2,
 356        .channels_max =         2,
 357        .buffer_bytes_max =     64 * 1024,
 358        .period_bytes_min =     64,
 359        .period_bytes_max =     32 * 1024,
 360        .periods_min =          2,
 361        .periods_max =          2,
 362};
 363
 364static struct snd_pcm_hardware snd_als300_capture_hw =
 365{
 366        .info =                 (SNDRV_PCM_INFO_MMAP |
 367                                SNDRV_PCM_INFO_INTERLEAVED |
 368                                SNDRV_PCM_INFO_PAUSE |
 369                                SNDRV_PCM_INFO_MMAP_VALID),
 370        .formats =              SNDRV_PCM_FMTBIT_S16,
 371        .rates =                SNDRV_PCM_RATE_48000,
 372        .rate_min =             48000,
 373        .rate_max =             48000,
 374        .channels_min =         2,
 375        .channels_max =         2,
 376        .buffer_bytes_max =     64 * 1024,
 377        .period_bytes_min =     64,
 378        .period_bytes_max =     32 * 1024,
 379        .periods_min =          2,
 380        .periods_max =          2,
 381};
 382
 383static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 384{
 385        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 386        struct snd_pcm_runtime *runtime = substream->runtime;
 387        struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 388                                                                GFP_KERNEL);
 389
 390        snd_als300_dbgcallenter();
 391        chip->playback_substream = substream;
 392        runtime->hw = snd_als300_playback_hw;
 393        runtime->private_data = data;
 394        data->control_register = PLAYBACK_CONTROL;
 395        data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 396        snd_als300_dbgcallleave();
 397        return 0;
 398}
 399
 400static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 401{
 402        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 403        struct snd_als300_substream_data *data;
 404
 405        data = substream->runtime->private_data;
 406        snd_als300_dbgcallenter();
 407        kfree(data);
 408        chip->playback_substream = NULL;
 409        snd_pcm_lib_free_pages(substream);
 410        snd_als300_dbgcallleave();
 411        return 0;
 412}
 413
 414static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 415{
 416        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 417        struct snd_pcm_runtime *runtime = substream->runtime;
 418        struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 419                                                                GFP_KERNEL);
 420
 421        snd_als300_dbgcallenter();
 422        chip->capture_substream = substream;
 423        runtime->hw = snd_als300_capture_hw;
 424        runtime->private_data = data;
 425        data->control_register = RECORD_CONTROL;
 426        data->block_counter_register = RECORD_BLOCK_COUNTER;
 427        snd_als300_dbgcallleave();
 428        return 0;
 429}
 430
 431static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 432{
 433        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 434        struct snd_als300_substream_data *data;
 435
 436        data = substream->runtime->private_data;
 437        snd_als300_dbgcallenter();
 438        kfree(data);
 439        chip->capture_substream = NULL;
 440        snd_pcm_lib_free_pages(substream);
 441        snd_als300_dbgcallleave();
 442        return 0;
 443}
 444
 445static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 446                                    struct snd_pcm_hw_params *hw_params)
 447{
 448        return snd_pcm_lib_malloc_pages(substream,
 449                                        params_buffer_bytes(hw_params));
 450}
 451
 452static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 453{
 454        return snd_pcm_lib_free_pages(substream);
 455}
 456
 457static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 458{
 459        u32 tmp;
 460        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 461        struct snd_pcm_runtime *runtime = substream->runtime;
 462        unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 463        unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 464        
 465        snd_als300_dbgcallenter();
 466        spin_lock_irq(&chip->reg_lock);
 467        tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 468        tmp &= ~TRANSFER_START;
 469
 470        snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 471                                                period_bytes, buffer_bytes);
 472        
 473        /* set block size */
 474        tmp &= 0xffff0000;
 475        tmp |= period_bytes - 1;
 476        snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 477
 478        /* set dma area */
 479        snd_als300_gcr_write(chip->port, PLAYBACK_START,
 480                                        runtime->dma_addr);
 481        snd_als300_gcr_write(chip->port, PLAYBACK_END,
 482                                        runtime->dma_addr + buffer_bytes - 1);
 483        spin_unlock_irq(&chip->reg_lock);
 484        snd_als300_dbgcallleave();
 485        return 0;
 486}
 487
 488static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 489{
 490        u32 tmp;
 491        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 492        struct snd_pcm_runtime *runtime = substream->runtime;
 493        unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 494        unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 495
 496        snd_als300_dbgcallenter();
 497        spin_lock_irq(&chip->reg_lock);
 498        tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 499        tmp &= ~TRANSFER_START;
 500
 501        snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 502                                                        buffer_bytes);
 503
 504        /* set block size */
 505        tmp &= 0xffff0000;
 506        tmp |= period_bytes - 1;
 507
 508        /* set dma area */
 509        snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 510        snd_als300_gcr_write(chip->port, RECORD_START,
 511                                        runtime->dma_addr);
 512        snd_als300_gcr_write(chip->port, RECORD_END,
 513                                        runtime->dma_addr + buffer_bytes - 1);
 514        spin_unlock_irq(&chip->reg_lock);
 515        snd_als300_dbgcallleave();
 516        return 0;
 517}
 518
 519static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 520{
 521        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 522        u32 tmp;
 523        struct snd_als300_substream_data *data;
 524        unsigned short reg;
 525        int ret = 0;
 526
 527        data = substream->runtime->private_data;
 528        reg = data->control_register;
 529
 530        snd_als300_dbgcallenter();
 531        spin_lock(&chip->reg_lock);
 532        switch (cmd) {
 533        case SNDRV_PCM_TRIGGER_START:
 534        case SNDRV_PCM_TRIGGER_RESUME:
 535                tmp = snd_als300_gcr_read(chip->port, reg);
 536                data->period_flipflop = 1;
 537                snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 538                snd_als300_dbgplay("TRIGGER START\n");
 539                break;
 540        case SNDRV_PCM_TRIGGER_STOP:
 541        case SNDRV_PCM_TRIGGER_SUSPEND:
 542                tmp = snd_als300_gcr_read(chip->port, reg);
 543                snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 544                snd_als300_dbgplay("TRIGGER STOP\n");
 545                break;
 546        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 547                tmp = snd_als300_gcr_read(chip->port, reg);
 548                snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 549                snd_als300_dbgplay("TRIGGER PAUSE\n");
 550                break;
 551        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 552                tmp = snd_als300_gcr_read(chip->port, reg);
 553                snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 554                snd_als300_dbgplay("TRIGGER RELEASE\n");
 555                break;
 556        default:
 557                snd_als300_dbgplay("TRIGGER INVALID\n");
 558                ret = -EINVAL;
 559        }
 560        spin_unlock(&chip->reg_lock);
 561        snd_als300_dbgcallleave();
 562        return ret;
 563}
 564
 565static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 566{
 567        u16 current_ptr;
 568        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 569        struct snd_als300_substream_data *data;
 570        unsigned short period_bytes;
 571
 572        data = substream->runtime->private_data;
 573        period_bytes = snd_pcm_lib_period_bytes(substream);
 574        
 575        snd_als300_dbgcallenter();
 576        spin_lock(&chip->reg_lock);
 577        current_ptr = (u16) snd_als300_gcr_read(chip->port,
 578                                        data->block_counter_register) + 4;
 579        spin_unlock(&chip->reg_lock);
 580        if (current_ptr > period_bytes)
 581                current_ptr = 0;
 582        else
 583                current_ptr = period_bytes - current_ptr;
 584
 585        if (data->period_flipflop == 0)
 586                current_ptr += period_bytes;
 587        snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 588        snd_als300_dbgcallleave();
 589        return bytes_to_frames(substream->runtime, current_ptr);
 590}
 591
 592static struct snd_pcm_ops snd_als300_playback_ops = {
 593        .open =         snd_als300_playback_open,
 594        .close =        snd_als300_playback_close,
 595        .ioctl =        snd_pcm_lib_ioctl,
 596        .hw_params =    snd_als300_pcm_hw_params,
 597        .hw_free =      snd_als300_pcm_hw_free,
 598        .prepare =      snd_als300_playback_prepare,
 599        .trigger =      snd_als300_trigger,
 600        .pointer =      snd_als300_pointer,
 601};
 602
 603static struct snd_pcm_ops snd_als300_capture_ops = {
 604        .open =         snd_als300_capture_open,
 605        .close =        snd_als300_capture_close,
 606        .ioctl =        snd_pcm_lib_ioctl,
 607        .hw_params =    snd_als300_pcm_hw_params,
 608        .hw_free =      snd_als300_pcm_hw_free,
 609        .prepare =      snd_als300_capture_prepare,
 610        .trigger =      snd_als300_trigger,
 611        .pointer =      snd_als300_pointer,
 612};
 613
 614static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
 615{
 616        struct snd_pcm *pcm;
 617        int err;
 618
 619        snd_als300_dbgcallenter();
 620        err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 621        if (err < 0)
 622                return err;
 623        pcm->private_data = chip;
 624        strcpy(pcm->name, "ALS300");
 625        chip->pcm = pcm;
 626
 627        /* set operators */
 628        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 629                                &snd_als300_playback_ops);
 630        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 631                                &snd_als300_capture_ops);
 632
 633        /* pre-allocation of buffers */
 634        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 635        snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 636        snd_als300_dbgcallleave();
 637        return 0;
 638}
 639
 640static void snd_als300_init(struct snd_als300 *chip)
 641{
 642        unsigned long flags;
 643        u32 tmp;
 644        
 645        snd_als300_dbgcallenter();
 646        spin_lock_irqsave(&chip->reg_lock, flags);
 647        chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 648                                                                & 0x0000000F;
 649        /* Setup DRAM */
 650        tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 651        snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 652                                                (tmp | DRAM_MODE_2)
 653                                                & ~WRITE_TRANS_START);
 654
 655        /* Enable IRQ output */
 656        snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 657
 658        /* Unmute hardware devices so their outputs get routed to
 659         * the onboard mixer */
 660        tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 661        snd_als300_gcr_write(chip->port, MISC_CONTROL,
 662                        tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 663
 664        /* Reset volumes */
 665        snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 666
 667        /* Make sure playback transfer is stopped */
 668        tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 669        snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 670                        tmp & ~TRANSFER_START);
 671        spin_unlock_irqrestore(&chip->reg_lock, flags);
 672        snd_als300_dbgcallleave();
 673}
 674
 675static int __devinit snd_als300_create(struct snd_card *card,
 676                                       struct pci_dev *pci, int chip_type,
 677                                       struct snd_als300 **rchip)
 678{
 679        struct snd_als300 *chip;
 680        void *irq_handler;
 681        int err;
 682
 683        static struct snd_device_ops ops = {
 684                .dev_free = snd_als300_dev_free,
 685        };
 686        *rchip = NULL;
 687
 688        snd_als300_dbgcallenter();
 689        if ((err = pci_enable_device(pci)) < 0)
 690                return err;
 691
 692        if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
 693                pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
 694                printk(KERN_ERR "error setting 28bit DMA mask\n");
 695                pci_disable_device(pci);
 696                return -ENXIO;
 697        }
 698        pci_set_master(pci);
 699
 700        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 701        if (chip == NULL) {
 702                pci_disable_device(pci);
 703                return -ENOMEM;
 704        }
 705
 706        chip->card = card;
 707        chip->pci = pci;
 708        chip->irq = -1;
 709        chip->chip_type = chip_type;
 710        spin_lock_init(&chip->reg_lock);
 711
 712        if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 713                kfree(chip);
 714                pci_disable_device(pci);
 715                return err;
 716        }
 717        chip->port = pci_resource_start(pci, 0);
 718
 719        if (chip->chip_type == DEVICE_ALS300_PLUS)
 720                irq_handler = snd_als300plus_interrupt;
 721        else
 722                irq_handler = snd_als300_interrupt;
 723
 724        if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
 725                        card->shortname, chip)) {
 726                snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 727                snd_als300_free(chip);
 728                return -EBUSY;
 729        }
 730        chip->irq = pci->irq;
 731
 732
 733        snd_als300_init(chip);
 734
 735        err = snd_als300_ac97(chip);
 736        if (err < 0) {
 737                snd_printk(KERN_WARNING "Could not create ac97\n");
 738                snd_als300_free(chip);
 739                return err;
 740        }
 741
 742        if ((err = snd_als300_new_pcm(chip)) < 0) {
 743                snd_printk(KERN_WARNING "Could not create PCM\n");
 744                snd_als300_free(chip);
 745                return err;
 746        }
 747
 748        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 749                                                chip, &ops)) < 0) {
 750                snd_als300_free(chip);
 751                return err;
 752        }
 753
 754        snd_card_set_dev(card, &pci->dev);
 755
 756        *rchip = chip;
 757        snd_als300_dbgcallleave();
 758        return 0;
 759}
 760
 761#ifdef CONFIG_PM
 762static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
 763{
 764        struct snd_card *card = pci_get_drvdata(pci);
 765        struct snd_als300 *chip = card->private_data;
 766
 767        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 768        snd_pcm_suspend_all(chip->pcm);
 769        snd_ac97_suspend(chip->ac97);
 770
 771        pci_disable_device(pci);
 772        pci_save_state(pci);
 773        pci_set_power_state(pci, pci_choose_state(pci, state));
 774        return 0;
 775}
 776
 777static int snd_als300_resume(struct pci_dev *pci)
 778{
 779        struct snd_card *card = pci_get_drvdata(pci);
 780        struct snd_als300 *chip = card->private_data;
 781
 782        pci_set_power_state(pci, PCI_D0);
 783        pci_restore_state(pci);
 784        if (pci_enable_device(pci) < 0) {
 785                printk(KERN_ERR "als300: pci_enable_device failed, "
 786                       "disabling device\n");
 787                snd_card_disconnect(card);
 788                return -EIO;
 789        }
 790        pci_set_master(pci);
 791
 792        snd_als300_init(chip);
 793        snd_ac97_resume(chip->ac97);
 794
 795        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 796        return 0;
 797}
 798#endif
 799
 800static int __devinit snd_als300_probe(struct pci_dev *pci,
 801                             const struct pci_device_id *pci_id)
 802{
 803        static int dev;
 804        struct snd_card *card;
 805        struct snd_als300 *chip;
 806        int err, chip_type;
 807
 808        if (dev >= SNDRV_CARDS)
 809                return -ENODEV;
 810        if (!enable[dev]) {
 811                dev++;
 812                return -ENOENT;
 813        }
 814
 815        err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 816
 817        if (err < 0)
 818                return err;
 819
 820        chip_type = pci_id->driver_data;
 821
 822        if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 823                snd_card_free(card);
 824                return err;
 825        }
 826        card->private_data = chip;
 827
 828        strcpy(card->driver, "ALS300");
 829        if (chip->chip_type == DEVICE_ALS300_PLUS)
 830                /* don't know much about ALS300+ yet
 831                 * print revision number for now */
 832                sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 833        else
 834                sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 835                                                        chip->revision - 1);
 836        sprintf(card->longname, "%s at 0x%lx irq %i",
 837                                card->shortname, chip->port, chip->irq);
 838
 839        if ((err = snd_card_register(card)) < 0) {
 840                snd_card_free(card);
 841                return err;
 842        }
 843        pci_set_drvdata(pci, card);
 844        dev++;
 845        return 0;
 846}
 847
 848static struct pci_driver driver = {
 849        .name = "ALS300",
 850        .id_table = snd_als300_ids,
 851        .probe = snd_als300_probe,
 852        .remove = __devexit_p(snd_als300_remove),
 853#ifdef CONFIG_PM
 854        .suspend = snd_als300_suspend,
 855        .resume = snd_als300_resume,
 856#endif
 857};
 858
 859static int __init alsa_card_als300_init(void)
 860{
 861        return pci_register_driver(&driver);
 862}
 863
 864static void __exit alsa_card_als300_exit(void)
 865{
 866        pci_unregister_driver(&driver);
 867}
 868
 869module_init(alsa_card_als300_init)
 870module_exit(alsa_card_als300_exit)
 871