linux/sound/mips/sgio2audio.c
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   1/*
   2 *   Sound driver for Silicon Graphics O2 Workstations A/V board audio.
   3 *
   4 *   Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>
   5 *   Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
   6 *   Mxier part taken from mace_audio.c:
   7 *   Copyright 2007 Thorben Jändling <tj.trevelyan@gmail.com>
   8 *
   9 *   This program is free software; you can redistribute it and/or modify
  10 *   it under the terms of the GNU General Public License as published by
  11 *   the Free Software Foundation; either version 2 of the License, or
  12 *   (at your option) any later version.
  13 *
  14 *   This program is distributed in the hope that it will be useful,
  15 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 *   GNU General Public License for more details.
  18 *
  19 *   You should have received a copy of the GNU General Public License
  20 *   along with this program; if not, write to the Free Software
  21 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22 *
  23 */
  24
  25#include <linux/init.h>
  26#include <linux/delay.h>
  27#include <linux/spinlock.h>
  28#include <linux/interrupt.h>
  29#include <linux/dma-mapping.h>
  30#include <linux/platform_device.h>
  31#include <linux/io.h>
  32#include <linux/slab.h>
  33#include <linux/module.h>
  34
  35#include <asm/ip32/ip32_ints.h>
  36#include <asm/ip32/mace.h>
  37
  38#include <sound/core.h>
  39#include <sound/control.h>
  40#include <sound/pcm.h>
  41#define SNDRV_GET_ID
  42#include <sound/initval.h>
  43#include <sound/ad1843.h>
  44
  45
  46MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>");
  47MODULE_DESCRIPTION("SGI O2 Audio");
  48MODULE_LICENSE("GPL");
  49MODULE_SUPPORTED_DEVICE("{{Silicon Graphics, O2 Audio}}");
  50
  51static int index = SNDRV_DEFAULT_IDX1;  /* Index 0-MAX */
  52static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  53
  54module_param(index, int, 0444);
  55MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard.");
  56module_param(id, charp, 0444);
  57MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard.");
  58
  59
  60#define AUDIO_CONTROL_RESET              BIT(0) /* 1: reset audio interface */
  61#define AUDIO_CONTROL_CODEC_PRESENT      BIT(1) /* 1: codec detected */
  62
  63#define CODEC_CONTROL_WORD_SHIFT        0
  64#define CODEC_CONTROL_READ              BIT(16)
  65#define CODEC_CONTROL_ADDRESS_SHIFT     17
  66
  67#define CHANNEL_CONTROL_RESET           BIT(10) /* 1: reset channel */
  68#define CHANNEL_DMA_ENABLE              BIT(9)  /* 1: enable DMA transfer */
  69#define CHANNEL_INT_THRESHOLD_DISABLED  (0 << 5) /* interrupt disabled */
  70#define CHANNEL_INT_THRESHOLD_25        (1 << 5) /* int on buffer >25% full */
  71#define CHANNEL_INT_THRESHOLD_50        (2 << 5) /* int on buffer >50% full */
  72#define CHANNEL_INT_THRESHOLD_75        (3 << 5) /* int on buffer >75% full */
  73#define CHANNEL_INT_THRESHOLD_EMPTY     (4 << 5) /* int on buffer empty */
  74#define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */
  75#define CHANNEL_INT_THRESHOLD_FULL      (6 << 5) /* int on buffer empty */
  76#define CHANNEL_INT_THRESHOLD_NOT_FULL  (7 << 5) /* int on buffer !empty */
  77
  78#define CHANNEL_RING_SHIFT              12
  79#define CHANNEL_RING_SIZE               (1 << CHANNEL_RING_SHIFT)
  80#define CHANNEL_RING_MASK               (CHANNEL_RING_SIZE - 1)
  81
  82#define CHANNEL_LEFT_SHIFT 40
  83#define CHANNEL_RIGHT_SHIFT 8
  84
  85struct snd_sgio2audio_chan {
  86        int idx;
  87        struct snd_pcm_substream *substream;
  88        int pos;
  89        snd_pcm_uframes_t size;
  90        spinlock_t lock;
  91};
  92
  93/* definition of the chip-specific record */
  94struct snd_sgio2audio {
  95        struct snd_card *card;
  96
  97        /* codec */
  98        struct snd_ad1843 ad1843;
  99        spinlock_t ad1843_lock;
 100
 101        /* channels */
 102        struct snd_sgio2audio_chan channel[3];
 103
 104        /* resources */
 105        void *ring_base;
 106        dma_addr_t ring_base_dma;
 107};
 108
 109/* AD1843 access */
 110
 111/*
 112 * read_ad1843_reg returns the current contents of a 16 bit AD1843 register.
 113 *
 114 * Returns unsigned register value on success, -errno on failure.
 115 */
 116static int read_ad1843_reg(void *priv, int reg)
 117{
 118        struct snd_sgio2audio *chip = priv;
 119        int val;
 120        unsigned long flags;
 121
 122        spin_lock_irqsave(&chip->ad1843_lock, flags);
 123
 124        writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
 125               CODEC_CONTROL_READ, &mace->perif.audio.codec_control);
 126        wmb();
 127        val = readq(&mace->perif.audio.codec_control); /* flush bus */
 128        udelay(200);
 129
 130        val = readq(&mace->perif.audio.codec_read);
 131
 132        spin_unlock_irqrestore(&chip->ad1843_lock, flags);
 133        return val;
 134}
 135
 136/*
 137 * write_ad1843_reg writes the specified value to a 16 bit AD1843 register.
 138 */
 139static int write_ad1843_reg(void *priv, int reg, int word)
 140{
 141        struct snd_sgio2audio *chip = priv;
 142        int val;
 143        unsigned long flags;
 144
 145        spin_lock_irqsave(&chip->ad1843_lock, flags);
 146
 147        writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
 148               (word << CODEC_CONTROL_WORD_SHIFT),
 149               &mace->perif.audio.codec_control);
 150        wmb();
 151        val = readq(&mace->perif.audio.codec_control); /* flush bus */
 152        udelay(200);
 153
 154        spin_unlock_irqrestore(&chip->ad1843_lock, flags);
 155        return 0;
 156}
 157
 158static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol,
 159                               struct snd_ctl_elem_info *uinfo)
 160{
 161        struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
 162
 163        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 164        uinfo->count = 2;
 165        uinfo->value.integer.min = 0;
 166        uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843,
 167                                             (int)kcontrol->private_value);
 168        return 0;
 169}
 170
 171static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol,
 172                               struct snd_ctl_elem_value *ucontrol)
 173{
 174        struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
 175        int vol;
 176
 177        vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value);
 178
 179        ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF;
 180        ucontrol->value.integer.value[1] = vol & 0xFF;
 181
 182        return 0;
 183}
 184
 185static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol,
 186                        struct snd_ctl_elem_value *ucontrol)
 187{
 188        struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
 189        int newvol, oldvol;
 190
 191        oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value);
 192        newvol = (ucontrol->value.integer.value[0] << 8) |
 193                ucontrol->value.integer.value[1];
 194
 195        newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value,
 196                newvol);
 197
 198        return newvol != oldvol;
 199}
 200
 201static int sgio2audio_source_info(struct snd_kcontrol *kcontrol,
 202                               struct snd_ctl_elem_info *uinfo)
 203{
 204        static const char *texts[3] = {
 205                "Cam Mic", "Mic", "Line"
 206        };
 207        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 208        uinfo->count = 1;
 209        uinfo->value.enumerated.items = 3;
 210        if (uinfo->value.enumerated.item >= 3)
 211                uinfo->value.enumerated.item = 1;
 212        strcpy(uinfo->value.enumerated.name,
 213               texts[uinfo->value.enumerated.item]);
 214        return 0;
 215}
 216
 217static int sgio2audio_source_get(struct snd_kcontrol *kcontrol,
 218                               struct snd_ctl_elem_value *ucontrol)
 219{
 220        struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
 221
 222        ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843);
 223        return 0;
 224}
 225
 226static int sgio2audio_source_put(struct snd_kcontrol *kcontrol,
 227                        struct snd_ctl_elem_value *ucontrol)
 228{
 229        struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
 230        int newsrc, oldsrc;
 231
 232        oldsrc = ad1843_get_recsrc(&chip->ad1843);
 233        newsrc = ad1843_set_recsrc(&chip->ad1843,
 234                                   ucontrol->value.enumerated.item[0]);
 235
 236        return newsrc != oldsrc;
 237}
 238
 239/* dac1/pcm0 mixer control */
 240static struct snd_kcontrol_new sgio2audio_ctrl_pcm0 __devinitdata = {
 241        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 242        .name           = "PCM Playback Volume",
 243        .index          = 0,
 244        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 245        .private_value  = AD1843_GAIN_PCM_0,
 246        .info           = sgio2audio_gain_info,
 247        .get            = sgio2audio_gain_get,
 248        .put            = sgio2audio_gain_put,
 249};
 250
 251/* dac2/pcm1 mixer control */
 252static struct snd_kcontrol_new sgio2audio_ctrl_pcm1 __devinitdata = {
 253        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 254        .name           = "PCM Playback Volume",
 255        .index          = 1,
 256        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 257        .private_value  = AD1843_GAIN_PCM_1,
 258        .info           = sgio2audio_gain_info,
 259        .get            = sgio2audio_gain_get,
 260        .put            = sgio2audio_gain_put,
 261};
 262
 263/* record level mixer control */
 264static struct snd_kcontrol_new sgio2audio_ctrl_reclevel __devinitdata = {
 265        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 266        .name           = "Capture Volume",
 267        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 268        .private_value  = AD1843_GAIN_RECLEV,
 269        .info           = sgio2audio_gain_info,
 270        .get            = sgio2audio_gain_get,
 271        .put            = sgio2audio_gain_put,
 272};
 273
 274/* record level source control */
 275static struct snd_kcontrol_new sgio2audio_ctrl_recsource __devinitdata = {
 276        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 277        .name           = "Capture Source",
 278        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 279        .info           = sgio2audio_source_info,
 280        .get            = sgio2audio_source_get,
 281        .put            = sgio2audio_source_put,
 282};
 283
 284/* line mixer control */
 285static struct snd_kcontrol_new sgio2audio_ctrl_line __devinitdata = {
 286        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 287        .name           = "Line Playback Volume",
 288        .index          = 0,
 289        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 290        .private_value  = AD1843_GAIN_LINE,
 291        .info           = sgio2audio_gain_info,
 292        .get            = sgio2audio_gain_get,
 293        .put            = sgio2audio_gain_put,
 294};
 295
 296/* cd mixer control */
 297static struct snd_kcontrol_new sgio2audio_ctrl_cd __devinitdata = {
 298        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 299        .name           = "Line Playback Volume",
 300        .index          = 1,
 301        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 302        .private_value  = AD1843_GAIN_LINE_2,
 303        .info           = sgio2audio_gain_info,
 304        .get            = sgio2audio_gain_get,
 305        .put            = sgio2audio_gain_put,
 306};
 307
 308/* mic mixer control */
 309static struct snd_kcontrol_new sgio2audio_ctrl_mic __devinitdata = {
 310        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 311        .name           = "Mic Playback Volume",
 312        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 313        .private_value  = AD1843_GAIN_MIC,
 314        .info           = sgio2audio_gain_info,
 315        .get            = sgio2audio_gain_get,
 316        .put            = sgio2audio_gain_put,
 317};
 318
 319
 320static int __devinit snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip)
 321{
 322        int err;
 323
 324        err = snd_ctl_add(chip->card,
 325                          snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip));
 326        if (err < 0)
 327                return err;
 328
 329        err = snd_ctl_add(chip->card,
 330                          snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip));
 331        if (err < 0)
 332                return err;
 333
 334        err = snd_ctl_add(chip->card,
 335                          snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip));
 336        if (err < 0)
 337                return err;
 338
 339        err = snd_ctl_add(chip->card,
 340                          snd_ctl_new1(&sgio2audio_ctrl_recsource, chip));
 341        if (err < 0)
 342                return err;
 343        err = snd_ctl_add(chip->card,
 344                          snd_ctl_new1(&sgio2audio_ctrl_line, chip));
 345        if (err < 0)
 346                return err;
 347
 348        err = snd_ctl_add(chip->card,
 349                          snd_ctl_new1(&sgio2audio_ctrl_cd, chip));
 350        if (err < 0)
 351                return err;
 352
 353        err = snd_ctl_add(chip->card,
 354                          snd_ctl_new1(&sgio2audio_ctrl_mic, chip));
 355        if (err < 0)
 356                return err;
 357
 358        return 0;
 359}
 360
 361/* low-level audio interface DMA */
 362
 363/* get data out of bounce buffer, count must be a multiple of 32 */
 364/* returns 1 if a period has elapsed */
 365static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip,
 366                                        unsigned int ch, unsigned int count)
 367{
 368        int ret;
 369        unsigned long src_base, src_pos, dst_mask;
 370        unsigned char *dst_base;
 371        int dst_pos;
 372        u64 *src;
 373        s16 *dst;
 374        u64 x;
 375        unsigned long flags;
 376        struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
 377
 378        spin_lock_irqsave(&chip->channel[ch].lock, flags);
 379
 380        src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT);
 381        src_pos = readq(&mace->perif.audio.chan[ch].read_ptr);
 382        dst_base = runtime->dma_area;
 383        dst_pos = chip->channel[ch].pos;
 384        dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
 385
 386        /* check if a period has elapsed */
 387        chip->channel[ch].size += (count >> 3); /* in frames */
 388        ret = chip->channel[ch].size >= runtime->period_size;
 389        chip->channel[ch].size %= runtime->period_size;
 390
 391        while (count) {
 392                src = (u64 *)(src_base + src_pos);
 393                dst = (s16 *)(dst_base + dst_pos);
 394
 395                x = *src;
 396                dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff;
 397                dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff;
 398
 399                src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK;
 400                dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask;
 401                count -= sizeof(u64);
 402        }
 403
 404        writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */
 405        chip->channel[ch].pos = dst_pos;
 406
 407        spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
 408        return ret;
 409}
 410
 411/* put some DMA data in bounce buffer, count must be a multiple of 32 */
 412/* returns 1 if a period has elapsed */
 413static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip,
 414                                        unsigned int ch, unsigned int count)
 415{
 416        int ret;
 417        s64 l, r;
 418        unsigned long dst_base, dst_pos, src_mask;
 419        unsigned char *src_base;
 420        int src_pos;
 421        u64 *dst;
 422        s16 *src;
 423        unsigned long flags;
 424        struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
 425
 426        spin_lock_irqsave(&chip->channel[ch].lock, flags);
 427
 428        dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT);
 429        dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr);
 430        src_base = runtime->dma_area;
 431        src_pos = chip->channel[ch].pos;
 432        src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
 433
 434        /* check if a period has elapsed */
 435        chip->channel[ch].size += (count >> 3); /* in frames */
 436        ret = chip->channel[ch].size >= runtime->period_size;
 437        chip->channel[ch].size %= runtime->period_size;
 438
 439        while (count) {
 440                src = (s16 *)(src_base + src_pos);
 441                dst = (u64 *)(dst_base + dst_pos);
 442
 443                l = src[0]; /* sign extend */
 444                r = src[1]; /* sign extend */
 445
 446                *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) |
 447                        ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT);
 448
 449                dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK;
 450                src_pos = (src_pos + 2 * sizeof(s16)) & src_mask;
 451                count -= sizeof(u64);
 452        }
 453
 454        writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */
 455        chip->channel[ch].pos = src_pos;
 456
 457        spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
 458        return ret;
 459}
 460
 461static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream)
 462{
 463        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 464        struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
 465        int ch = chan->idx;
 466
 467        /* reset DMA channel */
 468        writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control);
 469        udelay(10);
 470        writeq(0, &mace->perif.audio.chan[ch].control);
 471
 472        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 473                /* push a full buffer */
 474                snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32);
 475        }
 476        /* set DMA to wake on 50% empty and enable interrupt */
 477        writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50,
 478               &mace->perif.audio.chan[ch].control);
 479        return 0;
 480}
 481
 482static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream)
 483{
 484        struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
 485
 486        writeq(0, &mace->perif.audio.chan[chan->idx].control);
 487        return 0;
 488}
 489
 490static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id)
 491{
 492        struct snd_sgio2audio_chan *chan = dev_id;
 493        struct snd_pcm_substream *substream;
 494        struct snd_sgio2audio *chip;
 495        int count, ch;
 496
 497        substream = chan->substream;
 498        chip = snd_pcm_substream_chip(substream);
 499        ch = chan->idx;
 500
 501        /* empty the ring */
 502        count = CHANNEL_RING_SIZE -
 503                readq(&mace->perif.audio.chan[ch].depth) - 32;
 504        if (snd_sgio2audio_dma_pull_frag(chip, ch, count))
 505                snd_pcm_period_elapsed(substream);
 506
 507        return IRQ_HANDLED;
 508}
 509
 510static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id)
 511{
 512        struct snd_sgio2audio_chan *chan = dev_id;
 513        struct snd_pcm_substream *substream;
 514        struct snd_sgio2audio *chip;
 515        int count, ch;
 516
 517        substream = chan->substream;
 518        chip = snd_pcm_substream_chip(substream);
 519        ch = chan->idx;
 520        /* fill the ring */
 521        count = CHANNEL_RING_SIZE -
 522                readq(&mace->perif.audio.chan[ch].depth) - 32;
 523        if (snd_sgio2audio_dma_push_frag(chip, ch, count))
 524                snd_pcm_period_elapsed(substream);
 525
 526        return IRQ_HANDLED;
 527}
 528
 529static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)
 530{
 531        struct snd_sgio2audio_chan *chan = dev_id;
 532        struct snd_pcm_substream *substream;
 533
 534        substream = chan->substream;
 535        snd_sgio2audio_dma_stop(substream);
 536        snd_sgio2audio_dma_start(substream);
 537        return IRQ_HANDLED;
 538}
 539
 540/* PCM part */
 541/* PCM hardware definition */
 542static struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
 543        .info = (SNDRV_PCM_INFO_MMAP |
 544                 SNDRV_PCM_INFO_MMAP_VALID |
 545                 SNDRV_PCM_INFO_INTERLEAVED |
 546                 SNDRV_PCM_INFO_BLOCK_TRANSFER),
 547        .formats =          SNDRV_PCM_FMTBIT_S16_BE,
 548        .rates =            SNDRV_PCM_RATE_8000_48000,
 549        .rate_min =         8000,
 550        .rate_max =         48000,
 551        .channels_min =     2,
 552        .channels_max =     2,
 553        .buffer_bytes_max = 65536,
 554        .period_bytes_min = 32768,
 555        .period_bytes_max = 65536,
 556        .periods_min =      1,
 557        .periods_max =      1024,
 558};
 559
 560/* PCM playback open callback */
 561static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream)
 562{
 563        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 564        struct snd_pcm_runtime *runtime = substream->runtime;
 565
 566        runtime->hw = snd_sgio2audio_pcm_hw;
 567        runtime->private_data = &chip->channel[1];
 568        return 0;
 569}
 570
 571static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream)
 572{
 573        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 574        struct snd_pcm_runtime *runtime = substream->runtime;
 575
 576        runtime->hw = snd_sgio2audio_pcm_hw;
 577        runtime->private_data = &chip->channel[2];
 578        return 0;
 579}
 580
 581/* PCM capture open callback */
 582static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream)
 583{
 584        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 585        struct snd_pcm_runtime *runtime = substream->runtime;
 586
 587        runtime->hw = snd_sgio2audio_pcm_hw;
 588        runtime->private_data = &chip->channel[0];
 589        return 0;
 590}
 591
 592/* PCM close callback */
 593static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream)
 594{
 595        struct snd_pcm_runtime *runtime = substream->runtime;
 596
 597        runtime->private_data = NULL;
 598        return 0;
 599}
 600
 601
 602/* hw_params callback */
 603static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream,
 604                                        struct snd_pcm_hw_params *hw_params)
 605{
 606        return snd_pcm_lib_alloc_vmalloc_buffer(substream,
 607                                                params_buffer_bytes(hw_params));
 608}
 609
 610/* hw_free callback */
 611static int snd_sgio2audio_pcm_hw_free(struct snd_pcm_substream *substream)
 612{
 613        return snd_pcm_lib_free_vmalloc_buffer(substream);
 614}
 615
 616/* prepare callback */
 617static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)
 618{
 619        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 620        struct snd_pcm_runtime *runtime = substream->runtime;
 621        struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
 622        int ch = chan->idx;
 623        unsigned long flags;
 624
 625        spin_lock_irqsave(&chip->channel[ch].lock, flags);
 626
 627        /* Setup the pseudo-dma transfer pointers.  */
 628        chip->channel[ch].pos = 0;
 629        chip->channel[ch].size = 0;
 630        chip->channel[ch].substream = substream;
 631
 632        /* set AD1843 format */
 633        /* hardware format is always S16_LE */
 634        switch (substream->stream) {
 635        case SNDRV_PCM_STREAM_PLAYBACK:
 636                ad1843_setup_dac(&chip->ad1843,
 637                                 ch - 1,
 638                                 runtime->rate,
 639                                 SNDRV_PCM_FORMAT_S16_LE,
 640                                 runtime->channels);
 641                break;
 642        case SNDRV_PCM_STREAM_CAPTURE:
 643                ad1843_setup_adc(&chip->ad1843,
 644                                 runtime->rate,
 645                                 SNDRV_PCM_FORMAT_S16_LE,
 646                                 runtime->channels);
 647                break;
 648        }
 649        spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
 650        return 0;
 651}
 652
 653/* trigger callback */
 654static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,
 655                                      int cmd)
 656{
 657        switch (cmd) {
 658        case SNDRV_PCM_TRIGGER_START:
 659                /* start the PCM engine */
 660                snd_sgio2audio_dma_start(substream);
 661                break;
 662        case SNDRV_PCM_TRIGGER_STOP:
 663                /* stop the PCM engine */
 664                snd_sgio2audio_dma_stop(substream);
 665                break;
 666        default:
 667                return -EINVAL;
 668        }
 669        return 0;
 670}
 671
 672/* pointer callback */
 673static snd_pcm_uframes_t
 674snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)
 675{
 676        struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
 677        struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
 678
 679        /* get the current hardware pointer */
 680        return bytes_to_frames(substream->runtime,
 681                               chip->channel[chan->idx].pos);
 682}
 683
 684/* operators */
 685static struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
 686        .open =        snd_sgio2audio_playback1_open,
 687        .close =       snd_sgio2audio_pcm_close,
 688        .ioctl =       snd_pcm_lib_ioctl,
 689        .hw_params =   snd_sgio2audio_pcm_hw_params,
 690        .hw_free =     snd_sgio2audio_pcm_hw_free,
 691        .prepare =     snd_sgio2audio_pcm_prepare,
 692        .trigger =     snd_sgio2audio_pcm_trigger,
 693        .pointer =     snd_sgio2audio_pcm_pointer,
 694        .page =        snd_pcm_lib_get_vmalloc_page,
 695        .mmap =        snd_pcm_lib_mmap_vmalloc,
 696};
 697
 698static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
 699        .open =        snd_sgio2audio_playback2_open,
 700        .close =       snd_sgio2audio_pcm_close,
 701        .ioctl =       snd_pcm_lib_ioctl,
 702        .hw_params =   snd_sgio2audio_pcm_hw_params,
 703        .hw_free =     snd_sgio2audio_pcm_hw_free,
 704        .prepare =     snd_sgio2audio_pcm_prepare,
 705        .trigger =     snd_sgio2audio_pcm_trigger,
 706        .pointer =     snd_sgio2audio_pcm_pointer,
 707        .page =        snd_pcm_lib_get_vmalloc_page,
 708        .mmap =        snd_pcm_lib_mmap_vmalloc,
 709};
 710
 711static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
 712        .open =        snd_sgio2audio_capture_open,
 713        .close =       snd_sgio2audio_pcm_close,
 714        .ioctl =       snd_pcm_lib_ioctl,
 715        .hw_params =   snd_sgio2audio_pcm_hw_params,
 716        .hw_free =     snd_sgio2audio_pcm_hw_free,
 717        .prepare =     snd_sgio2audio_pcm_prepare,
 718        .trigger =     snd_sgio2audio_pcm_trigger,
 719        .pointer =     snd_sgio2audio_pcm_pointer,
 720        .page =        snd_pcm_lib_get_vmalloc_page,
 721        .mmap =        snd_pcm_lib_mmap_vmalloc,
 722};
 723
 724/*
 725 *  definitions of capture are omitted here...
 726 */
 727
 728/* create a pcm device */
 729static int __devinit snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)
 730{
 731        struct snd_pcm *pcm;
 732        int err;
 733
 734        /* create first pcm device with one outputs and one input */
 735        err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);
 736        if (err < 0)
 737                return err;
 738
 739        pcm->private_data = chip;
 740        strcpy(pcm->name, "SGI O2 DAC1");
 741
 742        /* set operators */
 743        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 744                        &snd_sgio2audio_playback1_ops);
 745        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 746                        &snd_sgio2audio_capture_ops);
 747
 748        /* create second  pcm device with one outputs and no input */
 749        err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);
 750        if (err < 0)
 751                return err;
 752
 753        pcm->private_data = chip;
 754        strcpy(pcm->name, "SGI O2 DAC2");
 755
 756        /* set operators */
 757        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 758                        &snd_sgio2audio_playback2_ops);
 759
 760        return 0;
 761}
 762
 763static struct {
 764        int idx;
 765        int irq;
 766        irqreturn_t (*isr)(int, void *);
 767        const char *desc;
 768} snd_sgio2_isr_table[] = {
 769        {
 770                .idx = 0,
 771                .irq = MACEISA_AUDIO1_DMAT_IRQ,
 772                .isr = snd_sgio2audio_dma_in_isr,
 773                .desc = "Capture DMA Channel 0"
 774        }, {
 775                .idx = 0,
 776                .irq = MACEISA_AUDIO1_OF_IRQ,
 777                .isr = snd_sgio2audio_error_isr,
 778                .desc = "Capture Overflow"
 779        }, {
 780                .idx = 1,
 781                .irq = MACEISA_AUDIO2_DMAT_IRQ,
 782                .isr = snd_sgio2audio_dma_out_isr,
 783                .desc = "Playback DMA Channel 1"
 784        }, {
 785                .idx = 1,
 786                .irq = MACEISA_AUDIO2_MERR_IRQ,
 787                .isr = snd_sgio2audio_error_isr,
 788                .desc = "Memory Error Channel 1"
 789        }, {
 790                .idx = 2,
 791                .irq = MACEISA_AUDIO3_DMAT_IRQ,
 792                .isr = snd_sgio2audio_dma_out_isr,
 793                .desc = "Playback DMA Channel 2"
 794        }, {
 795                .idx = 2,
 796                .irq = MACEISA_AUDIO3_MERR_IRQ,
 797                .isr = snd_sgio2audio_error_isr,
 798                .desc = "Memory Error Channel 2"
 799        }
 800};
 801
 802/* ALSA driver */
 803
 804static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
 805{
 806        int i;
 807
 808        /* reset interface */
 809        writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
 810        udelay(1);
 811        writeq(0, &mace->perif.audio.control);
 812
 813        /* release IRQ's */
 814        for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
 815                free_irq(snd_sgio2_isr_table[i].irq,
 816                         &chip->channel[snd_sgio2_isr_table[i].idx]);
 817
 818        dma_free_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
 819                          chip->ring_base, chip->ring_base_dma);
 820
 821        /* release card data */
 822        kfree(chip);
 823        return 0;
 824}
 825
 826static int snd_sgio2audio_dev_free(struct snd_device *device)
 827{
 828        struct snd_sgio2audio *chip = device->device_data;
 829
 830        return snd_sgio2audio_free(chip);
 831}
 832
 833static struct snd_device_ops ops = {
 834        .dev_free = snd_sgio2audio_dev_free,
 835};
 836
 837static int __devinit snd_sgio2audio_create(struct snd_card *card,
 838                                           struct snd_sgio2audio **rchip)
 839{
 840        struct snd_sgio2audio *chip;
 841        int i, err;
 842
 843        *rchip = NULL;
 844
 845        /* check if a codec is attached to the interface */
 846        /* (Audio or Audio/Video board present) */
 847        if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))
 848                return -ENOENT;
 849
 850        chip = kzalloc(sizeof(struct snd_sgio2audio), GFP_KERNEL);
 851        if (chip == NULL)
 852                return -ENOMEM;
 853
 854        chip->card = card;
 855
 856        chip->ring_base = dma_alloc_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
 857                                             &chip->ring_base_dma, GFP_USER);
 858        if (chip->ring_base == NULL) {
 859                printk(KERN_ERR
 860                       "sgio2audio: could not allocate ring buffers\n");
 861                kfree(chip);
 862                return -ENOMEM;
 863        }
 864
 865        spin_lock_init(&chip->ad1843_lock);
 866
 867        /* initialize channels */
 868        for (i = 0; i < 3; i++) {
 869                spin_lock_init(&chip->channel[i].lock);
 870                chip->channel[i].idx = i;
 871        }
 872
 873        /* allocate IRQs */
 874        for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {
 875                if (request_irq(snd_sgio2_isr_table[i].irq,
 876                                snd_sgio2_isr_table[i].isr,
 877                                0,
 878                                snd_sgio2_isr_table[i].desc,
 879                                &chip->channel[snd_sgio2_isr_table[i].idx])) {
 880                        snd_sgio2audio_free(chip);
 881                        printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
 882                               snd_sgio2_isr_table[i].irq);
 883                        return -EBUSY;
 884                }
 885        }
 886
 887        /* reset the interface */
 888        writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
 889        udelay(1);
 890        writeq(0, &mace->perif.audio.control);
 891        msleep_interruptible(1); /* give time to recover */
 892
 893        /* set ring base */
 894        writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);
 895
 896        /* attach the AD1843 codec */
 897        chip->ad1843.read = read_ad1843_reg;
 898        chip->ad1843.write = write_ad1843_reg;
 899        chip->ad1843.chip = chip;
 900
 901        /* initialize the AD1843 codec */
 902        err = ad1843_init(&chip->ad1843);
 903        if (err < 0) {
 904                snd_sgio2audio_free(chip);
 905                return err;
 906        }
 907
 908        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 909        if (err < 0) {
 910                snd_sgio2audio_free(chip);
 911                return err;
 912        }
 913        *rchip = chip;
 914        return 0;
 915}
 916
 917static int __devinit snd_sgio2audio_probe(struct platform_device *pdev)
 918{
 919        struct snd_card *card;
 920        struct snd_sgio2audio *chip;
 921        int err;
 922
 923        err = snd_card_create(index, id, THIS_MODULE, 0, &card);
 924        if (err < 0)
 925                return err;
 926
 927        err = snd_sgio2audio_create(card, &chip);
 928        if (err < 0) {
 929                snd_card_free(card);
 930                return err;
 931        }
 932        snd_card_set_dev(card, &pdev->dev);
 933
 934        err = snd_sgio2audio_new_pcm(chip);
 935        if (err < 0) {
 936                snd_card_free(card);
 937                return err;
 938        }
 939        err = snd_sgio2audio_new_mixer(chip);
 940        if (err < 0) {
 941                snd_card_free(card);
 942                return err;
 943        }
 944
 945        strcpy(card->driver, "SGI O2 Audio");
 946        strcpy(card->shortname, "SGI O2 Audio");
 947        sprintf(card->longname, "%s irq %i-%i",
 948                card->shortname,
 949                MACEISA_AUDIO1_DMAT_IRQ,
 950                MACEISA_AUDIO3_MERR_IRQ);
 951
 952        err = snd_card_register(card);
 953        if (err < 0) {
 954                snd_card_free(card);
 955                return err;
 956        }
 957        platform_set_drvdata(pdev, card);
 958        return 0;
 959}
 960
 961static int __devexit snd_sgio2audio_remove(struct platform_device *pdev)
 962{
 963        struct snd_card *card = platform_get_drvdata(pdev);
 964
 965        snd_card_free(card);
 966        platform_set_drvdata(pdev, NULL);
 967        return 0;
 968}
 969
 970static struct platform_driver sgio2audio_driver = {
 971        .probe  = snd_sgio2audio_probe,
 972        .remove = __devexit_p(snd_sgio2audio_remove),
 973        .driver = {
 974                .name   = "sgio2audio",
 975                .owner  = THIS_MODULE,
 976        }
 977};
 978
 979module_platform_driver(sgio2audio_driver);
 980
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