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 snd_als300_remove(struct pci_dev *pci)
 282{
 283        snd_als300_dbgcallenter();
 284        snd_card_free(pci_get_drvdata(pci));
 285        snd_als300_dbgcallleave();
 286}
 287
 288static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
 289                                                        unsigned short reg)
 290{
 291        int i;
 292        struct snd_als300 *chip = ac97->private_data;
 293
 294        for (i = 0; i < 1000; i++) {
 295                if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 296                        break;
 297                udelay(10);
 298        }
 299        outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
 300
 301        for (i = 0; i < 1000; i++) {
 302                if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
 303                        break;
 304                udelay(10);
 305        }
 306        return inw(chip->port+AC97_READ);
 307}
 308
 309static void snd_als300_ac97_write(struct snd_ac97 *ac97,
 310                                unsigned short reg, unsigned short val)
 311{
 312        int i;
 313        struct snd_als300 *chip = ac97->private_data;
 314
 315        for (i = 0; i < 1000; i++) {
 316                if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
 317                        break;
 318                udelay(10);
 319        }
 320        outl((reg << 24) | val, chip->port+AC97_ACCESS);
 321}
 322
 323static int snd_als300_ac97(struct snd_als300 *chip)
 324{
 325        struct snd_ac97_bus *bus;
 326        struct snd_ac97_template ac97;
 327        int err;
 328        static struct snd_ac97_bus_ops ops = {
 329                .write = snd_als300_ac97_write,
 330                .read = snd_als300_ac97_read,
 331        };
 332
 333        snd_als300_dbgcallenter();
 334        if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
 335                return err;
 336
 337        memset(&ac97, 0, sizeof(ac97));
 338        ac97.private_data = chip;
 339
 340        snd_als300_dbgcallleave();
 341        return snd_ac97_mixer(bus, &ac97, &chip->ac97);
 342}
 343
 344/* hardware definition
 345 *
 346 * In AC97 mode, we always use 48k/16bit/stereo.
 347 * Any request to change data type is ignored by
 348 * the card when it is running outside of legacy
 349 * mode.
 350 */
 351static struct snd_pcm_hardware snd_als300_playback_hw =
 352{
 353        .info =                 (SNDRV_PCM_INFO_MMAP |
 354                                SNDRV_PCM_INFO_INTERLEAVED |
 355                                SNDRV_PCM_INFO_PAUSE |
 356                                SNDRV_PCM_INFO_MMAP_VALID),
 357        .formats =              SNDRV_PCM_FMTBIT_S16,
 358        .rates =                SNDRV_PCM_RATE_48000,
 359        .rate_min =             48000,
 360        .rate_max =             48000,
 361        .channels_min =         2,
 362        .channels_max =         2,
 363        .buffer_bytes_max =     64 * 1024,
 364        .period_bytes_min =     64,
 365        .period_bytes_max =     32 * 1024,
 366        .periods_min =          2,
 367        .periods_max =          2,
 368};
 369
 370static struct snd_pcm_hardware snd_als300_capture_hw =
 371{
 372        .info =                 (SNDRV_PCM_INFO_MMAP |
 373                                SNDRV_PCM_INFO_INTERLEAVED |
 374                                SNDRV_PCM_INFO_PAUSE |
 375                                SNDRV_PCM_INFO_MMAP_VALID),
 376        .formats =              SNDRV_PCM_FMTBIT_S16,
 377        .rates =                SNDRV_PCM_RATE_48000,
 378        .rate_min =             48000,
 379        .rate_max =             48000,
 380        .channels_min =         2,
 381        .channels_max =         2,
 382        .buffer_bytes_max =     64 * 1024,
 383        .period_bytes_min =     64,
 384        .period_bytes_max =     32 * 1024,
 385        .periods_min =          2,
 386        .periods_max =          2,
 387};
 388
 389static int snd_als300_playback_open(struct snd_pcm_substream *substream)
 390{
 391        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 392        struct snd_pcm_runtime *runtime = substream->runtime;
 393        struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 394                                                                GFP_KERNEL);
 395
 396        if (!data)
 397                return -ENOMEM;
 398        snd_als300_dbgcallenter();
 399        chip->playback_substream = substream;
 400        runtime->hw = snd_als300_playback_hw;
 401        runtime->private_data = data;
 402        data->control_register = PLAYBACK_CONTROL;
 403        data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
 404        snd_als300_dbgcallleave();
 405        return 0;
 406}
 407
 408static int snd_als300_playback_close(struct snd_pcm_substream *substream)
 409{
 410        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 411        struct snd_als300_substream_data *data;
 412
 413        data = substream->runtime->private_data;
 414        snd_als300_dbgcallenter();
 415        kfree(data);
 416        chip->playback_substream = NULL;
 417        snd_pcm_lib_free_pages(substream);
 418        snd_als300_dbgcallleave();
 419        return 0;
 420}
 421
 422static int snd_als300_capture_open(struct snd_pcm_substream *substream)
 423{
 424        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 425        struct snd_pcm_runtime *runtime = substream->runtime;
 426        struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
 427                                                                GFP_KERNEL);
 428
 429        if (!data)
 430                return -ENOMEM;
 431        snd_als300_dbgcallenter();
 432        chip->capture_substream = substream;
 433        runtime->hw = snd_als300_capture_hw;
 434        runtime->private_data = data;
 435        data->control_register = RECORD_CONTROL;
 436        data->block_counter_register = RECORD_BLOCK_COUNTER;
 437        snd_als300_dbgcallleave();
 438        return 0;
 439}
 440
 441static int snd_als300_capture_close(struct snd_pcm_substream *substream)
 442{
 443        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 444        struct snd_als300_substream_data *data;
 445
 446        data = substream->runtime->private_data;
 447        snd_als300_dbgcallenter();
 448        kfree(data);
 449        chip->capture_substream = NULL;
 450        snd_pcm_lib_free_pages(substream);
 451        snd_als300_dbgcallleave();
 452        return 0;
 453}
 454
 455static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
 456                                    struct snd_pcm_hw_params *hw_params)
 457{
 458        return snd_pcm_lib_malloc_pages(substream,
 459                                        params_buffer_bytes(hw_params));
 460}
 461
 462static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
 463{
 464        return snd_pcm_lib_free_pages(substream);
 465}
 466
 467static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
 468{
 469        u32 tmp;
 470        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 471        struct snd_pcm_runtime *runtime = substream->runtime;
 472        unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 473        unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 474        
 475        snd_als300_dbgcallenter();
 476        spin_lock_irq(&chip->reg_lock);
 477        tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 478        tmp &= ~TRANSFER_START;
 479
 480        snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
 481                                                period_bytes, buffer_bytes);
 482        
 483        /* set block size */
 484        tmp &= 0xffff0000;
 485        tmp |= period_bytes - 1;
 486        snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
 487
 488        /* set dma area */
 489        snd_als300_gcr_write(chip->port, PLAYBACK_START,
 490                                        runtime->dma_addr);
 491        snd_als300_gcr_write(chip->port, PLAYBACK_END,
 492                                        runtime->dma_addr + buffer_bytes - 1);
 493        spin_unlock_irq(&chip->reg_lock);
 494        snd_als300_dbgcallleave();
 495        return 0;
 496}
 497
 498static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
 499{
 500        u32 tmp;
 501        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 502        struct snd_pcm_runtime *runtime = substream->runtime;
 503        unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 504        unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 505
 506        snd_als300_dbgcallenter();
 507        spin_lock_irq(&chip->reg_lock);
 508        tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 509        tmp &= ~TRANSFER_START;
 510
 511        snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
 512                                                        buffer_bytes);
 513
 514        /* set block size */
 515        tmp &= 0xffff0000;
 516        tmp |= period_bytes - 1;
 517
 518        /* set dma area */
 519        snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
 520        snd_als300_gcr_write(chip->port, RECORD_START,
 521                                        runtime->dma_addr);
 522        snd_als300_gcr_write(chip->port, RECORD_END,
 523                                        runtime->dma_addr + buffer_bytes - 1);
 524        spin_unlock_irq(&chip->reg_lock);
 525        snd_als300_dbgcallleave();
 526        return 0;
 527}
 528
 529static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
 530{
 531        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 532        u32 tmp;
 533        struct snd_als300_substream_data *data;
 534        unsigned short reg;
 535        int ret = 0;
 536
 537        data = substream->runtime->private_data;
 538        reg = data->control_register;
 539
 540        snd_als300_dbgcallenter();
 541        spin_lock(&chip->reg_lock);
 542        switch (cmd) {
 543        case SNDRV_PCM_TRIGGER_START:
 544        case SNDRV_PCM_TRIGGER_RESUME:
 545                tmp = snd_als300_gcr_read(chip->port, reg);
 546                data->period_flipflop = 1;
 547                snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
 548                snd_als300_dbgplay("TRIGGER START\n");
 549                break;
 550        case SNDRV_PCM_TRIGGER_STOP:
 551        case SNDRV_PCM_TRIGGER_SUSPEND:
 552                tmp = snd_als300_gcr_read(chip->port, reg);
 553                snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
 554                snd_als300_dbgplay("TRIGGER STOP\n");
 555                break;
 556        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 557                tmp = snd_als300_gcr_read(chip->port, reg);
 558                snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
 559                snd_als300_dbgplay("TRIGGER PAUSE\n");
 560                break;
 561        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 562                tmp = snd_als300_gcr_read(chip->port, reg);
 563                snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
 564                snd_als300_dbgplay("TRIGGER RELEASE\n");
 565                break;
 566        default:
 567                snd_als300_dbgplay("TRIGGER INVALID\n");
 568                ret = -EINVAL;
 569        }
 570        spin_unlock(&chip->reg_lock);
 571        snd_als300_dbgcallleave();
 572        return ret;
 573}
 574
 575static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
 576{
 577        u16 current_ptr;
 578        struct snd_als300 *chip = snd_pcm_substream_chip(substream);
 579        struct snd_als300_substream_data *data;
 580        unsigned short period_bytes;
 581
 582        data = substream->runtime->private_data;
 583        period_bytes = snd_pcm_lib_period_bytes(substream);
 584        
 585        snd_als300_dbgcallenter();
 586        spin_lock(&chip->reg_lock);
 587        current_ptr = (u16) snd_als300_gcr_read(chip->port,
 588                                        data->block_counter_register) + 4;
 589        spin_unlock(&chip->reg_lock);
 590        if (current_ptr > period_bytes)
 591                current_ptr = 0;
 592        else
 593                current_ptr = period_bytes - current_ptr;
 594
 595        if (data->period_flipflop == 0)
 596                current_ptr += period_bytes;
 597        snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
 598        snd_als300_dbgcallleave();
 599        return bytes_to_frames(substream->runtime, current_ptr);
 600}
 601
 602static struct snd_pcm_ops snd_als300_playback_ops = {
 603        .open =         snd_als300_playback_open,
 604        .close =        snd_als300_playback_close,
 605        .ioctl =        snd_pcm_lib_ioctl,
 606        .hw_params =    snd_als300_pcm_hw_params,
 607        .hw_free =      snd_als300_pcm_hw_free,
 608        .prepare =      snd_als300_playback_prepare,
 609        .trigger =      snd_als300_trigger,
 610        .pointer =      snd_als300_pointer,
 611};
 612
 613static struct snd_pcm_ops snd_als300_capture_ops = {
 614        .open =         snd_als300_capture_open,
 615        .close =        snd_als300_capture_close,
 616        .ioctl =        snd_pcm_lib_ioctl,
 617        .hw_params =    snd_als300_pcm_hw_params,
 618        .hw_free =      snd_als300_pcm_hw_free,
 619        .prepare =      snd_als300_capture_prepare,
 620        .trigger =      snd_als300_trigger,
 621        .pointer =      snd_als300_pointer,
 622};
 623
 624static int snd_als300_new_pcm(struct snd_als300 *chip)
 625{
 626        struct snd_pcm *pcm;
 627        int err;
 628
 629        snd_als300_dbgcallenter();
 630        err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
 631        if (err < 0)
 632                return err;
 633        pcm->private_data = chip;
 634        strcpy(pcm->name, "ALS300");
 635        chip->pcm = pcm;
 636
 637        /* set operators */
 638        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 639                                &snd_als300_playback_ops);
 640        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 641                                &snd_als300_capture_ops);
 642
 643        /* pre-allocation of buffers */
 644        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 645        snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 646        snd_als300_dbgcallleave();
 647        return 0;
 648}
 649
 650static void snd_als300_init(struct snd_als300 *chip)
 651{
 652        unsigned long flags;
 653        u32 tmp;
 654        
 655        snd_als300_dbgcallenter();
 656        spin_lock_irqsave(&chip->reg_lock, flags);
 657        chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 658                                                                & 0x0000000F;
 659        /* Setup DRAM */
 660        tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
 661        snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
 662                                                (tmp | DRAM_MODE_2)
 663                                                & ~WRITE_TRANS_START);
 664
 665        /* Enable IRQ output */
 666        snd_als300_set_irq_flag(chip, IRQ_ENABLE);
 667
 668        /* Unmute hardware devices so their outputs get routed to
 669         * the onboard mixer */
 670        tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
 671        snd_als300_gcr_write(chip->port, MISC_CONTROL,
 672                        tmp | VMUTE_NORMAL | MMUTE_NORMAL);
 673
 674        /* Reset volumes */
 675        snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
 676
 677        /* Make sure playback transfer is stopped */
 678        tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 679        snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 680                        tmp & ~TRANSFER_START);
 681        spin_unlock_irqrestore(&chip->reg_lock, flags);
 682        snd_als300_dbgcallleave();
 683}
 684
 685static int snd_als300_create(struct snd_card *card,
 686                             struct pci_dev *pci, int chip_type,
 687                             struct snd_als300 **rchip)
 688{
 689        struct snd_als300 *chip;
 690        void *irq_handler;
 691        int err;
 692
 693        static struct snd_device_ops ops = {
 694                .dev_free = snd_als300_dev_free,
 695        };
 696        *rchip = NULL;
 697
 698        snd_als300_dbgcallenter();
 699        if ((err = pci_enable_device(pci)) < 0)
 700                return err;
 701
 702        if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
 703                pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
 704                printk(KERN_ERR "error setting 28bit DMA mask\n");
 705                pci_disable_device(pci);
 706                return -ENXIO;
 707        }
 708        pci_set_master(pci);
 709
 710        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 711        if (chip == NULL) {
 712                pci_disable_device(pci);
 713                return -ENOMEM;
 714        }
 715
 716        chip->card = card;
 717        chip->pci = pci;
 718        chip->irq = -1;
 719        chip->chip_type = chip_type;
 720        spin_lock_init(&chip->reg_lock);
 721
 722        if ((err = pci_request_regions(pci, "ALS300")) < 0) {
 723                kfree(chip);
 724                pci_disable_device(pci);
 725                return err;
 726        }
 727        chip->port = pci_resource_start(pci, 0);
 728
 729        if (chip->chip_type == DEVICE_ALS300_PLUS)
 730                irq_handler = snd_als300plus_interrupt;
 731        else
 732                irq_handler = snd_als300_interrupt;
 733
 734        if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
 735                        KBUILD_MODNAME, chip)) {
 736                snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 737                snd_als300_free(chip);
 738                return -EBUSY;
 739        }
 740        chip->irq = pci->irq;
 741
 742
 743        snd_als300_init(chip);
 744
 745        err = snd_als300_ac97(chip);
 746        if (err < 0) {
 747                snd_printk(KERN_WARNING "Could not create ac97\n");
 748                snd_als300_free(chip);
 749                return err;
 750        }
 751
 752        if ((err = snd_als300_new_pcm(chip)) < 0) {
 753                snd_printk(KERN_WARNING "Could not create PCM\n");
 754                snd_als300_free(chip);
 755                return err;
 756        }
 757
 758        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 759                                                chip, &ops)) < 0) {
 760                snd_als300_free(chip);
 761                return err;
 762        }
 763
 764        snd_card_set_dev(card, &pci->dev);
 765
 766        *rchip = chip;
 767        snd_als300_dbgcallleave();
 768        return 0;
 769}
 770
 771#ifdef CONFIG_PM_SLEEP
 772static int snd_als300_suspend(struct device *dev)
 773{
 774        struct pci_dev *pci = to_pci_dev(dev);
 775        struct snd_card *card = dev_get_drvdata(dev);
 776        struct snd_als300 *chip = card->private_data;
 777
 778        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 779        snd_pcm_suspend_all(chip->pcm);
 780        snd_ac97_suspend(chip->ac97);
 781
 782        pci_disable_device(pci);
 783        pci_save_state(pci);
 784        pci_set_power_state(pci, PCI_D3hot);
 785        return 0;
 786}
 787
 788static int snd_als300_resume(struct device *dev)
 789{
 790        struct pci_dev *pci = to_pci_dev(dev);
 791        struct snd_card *card = dev_get_drvdata(dev);
 792        struct snd_als300 *chip = card->private_data;
 793
 794        pci_set_power_state(pci, PCI_D0);
 795        pci_restore_state(pci);
 796        if (pci_enable_device(pci) < 0) {
 797                printk(KERN_ERR "als300: pci_enable_device failed, "
 798                       "disabling device\n");
 799                snd_card_disconnect(card);
 800                return -EIO;
 801        }
 802        pci_set_master(pci);
 803
 804        snd_als300_init(chip);
 805        snd_ac97_resume(chip->ac97);
 806
 807        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 808        return 0;
 809}
 810
 811static SIMPLE_DEV_PM_OPS(snd_als300_pm, snd_als300_suspend, snd_als300_resume);
 812#define SND_ALS300_PM_OPS       &snd_als300_pm
 813#else
 814#define SND_ALS300_PM_OPS       NULL
 815#endif
 816
 817static int snd_als300_probe(struct pci_dev *pci,
 818                             const struct pci_device_id *pci_id)
 819{
 820        static int dev;
 821        struct snd_card *card;
 822        struct snd_als300 *chip;
 823        int err, chip_type;
 824
 825        if (dev >= SNDRV_CARDS)
 826                return -ENODEV;
 827        if (!enable[dev]) {
 828                dev++;
 829                return -ENOENT;
 830        }
 831
 832        err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 833
 834        if (err < 0)
 835                return err;
 836
 837        chip_type = pci_id->driver_data;
 838
 839        if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
 840                snd_card_free(card);
 841                return err;
 842        }
 843        card->private_data = chip;
 844
 845        strcpy(card->driver, "ALS300");
 846        if (chip->chip_type == DEVICE_ALS300_PLUS)
 847                /* don't know much about ALS300+ yet
 848                 * print revision number for now */
 849                sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
 850        else
 851                sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
 852                                                        chip->revision - 1);
 853        sprintf(card->longname, "%s at 0x%lx irq %i",
 854                                card->shortname, chip->port, chip->irq);
 855
 856        if ((err = snd_card_register(card)) < 0) {
 857                snd_card_free(card);
 858                return err;
 859        }
 860        pci_set_drvdata(pci, card);
 861        dev++;
 862        return 0;
 863}
 864
 865static struct pci_driver als300_driver = {
 866        .name = KBUILD_MODNAME,
 867        .id_table = snd_als300_ids,
 868        .probe = snd_als300_probe,
 869        .remove = snd_als300_remove,
 870        .driver = {
 871                .pm = SND_ALS300_PM_OPS,
 872        },
 873};
 874
 875module_pci_driver(als300_driver);
 876
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