linux/sound/ppc/pmac.c
<<
>>
Prefs
   1/*
   2 * PMac DBDMA lowlevel functions
   3 *
   4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
   5 * code based on dmasound.c.
   6 *
   7 *   This program is free software; you can redistribute it and/or modify
   8 *   it under the terms of the GNU General Public License as published by
   9 *   the Free Software Foundation; either version 2 of the License, or
  10 *   (at your option) any later version.
  11 *
  12 *   This program is distributed in the hope that it will be useful,
  13 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *   GNU General Public License for more details.
  16 *
  17 *   You should have received a copy of the GNU General Public License
  18 *   along with this program; if not, write to the Free Software
  19 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20 */
  21
  22
  23#include <linux/io.h>
  24#include <asm/irq.h>
  25#include <linux/init.h>
  26#include <linux/delay.h>
  27#include <linux/slab.h>
  28#include <linux/interrupt.h>
  29#include <linux/pci.h>
  30#include <linux/dma-mapping.h>
  31#include <linux/of_address.h>
  32#include <linux/of_irq.h>
  33#include <sound/core.h>
  34#include "pmac.h"
  35#include <sound/pcm_params.h>
  36#include <asm/pmac_feature.h>
  37
  38
  39/* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  40static int awacs_freqs[8] = {
  41        44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  42};
  43/* fixed frequency table for tumbler */
  44static int tumbler_freqs[1] = {
  45        44100
  46};
  47
  48
  49/*
  50 * we will allocate a single 'emergency' dbdma cmd block to use if the
  51 * tx status comes up "DEAD".  This happens on some PowerComputing Pmac
  52 * clones, either owing to a bug in dbdma or some interaction between
  53 * IDE and sound.  However, this measure would deal with DEAD status if
  54 * it appeared elsewhere.
  55 */
  56static struct pmac_dbdma emergency_dbdma;
  57static int emergency_in_use;
  58
  59
  60/*
  61 * allocate DBDMA command arrays
  62 */
  63static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
  64{
  65        unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
  66
  67        rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
  68                                        &rec->dma_base, GFP_KERNEL);
  69        if (rec->space == NULL)
  70                return -ENOMEM;
  71        rec->size = size;
  72        memset(rec->space, 0, rsize);
  73        rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
  74        rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
  75
  76        return 0;
  77}
  78
  79static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
  80{
  81        if (rec->space) {
  82                unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
  83
  84                dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
  85        }
  86}
  87
  88
  89/*
  90 * pcm stuff
  91 */
  92
  93/*
  94 * look up frequency table
  95 */
  96
  97unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
  98{
  99        int i, ok, found;
 100
 101        ok = rec->cur_freqs;
 102        if (rate > chip->freq_table[0])
 103                return 0;
 104        found = 0;
 105        for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
 106                if (! (ok & 1)) continue;
 107                found = i;
 108                if (rate >= chip->freq_table[i])
 109                        break;
 110        }
 111        return found;
 112}
 113
 114/*
 115 * check whether another stream is active
 116 */
 117static inline int another_stream(int stream)
 118{
 119        return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 120                SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 121}
 122
 123/*
 124 * allocate buffers
 125 */
 126static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
 127                                  struct snd_pcm_hw_params *hw_params)
 128{
 129        return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 130}
 131
 132/*
 133 * release buffers
 134 */
 135static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
 136{
 137        snd_pcm_lib_free_pages(subs);
 138        return 0;
 139}
 140
 141/*
 142 * get a stream of the opposite direction
 143 */
 144static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
 145{
 146        switch (stream) {
 147        case SNDRV_PCM_STREAM_PLAYBACK:
 148                return &chip->playback;
 149        case SNDRV_PCM_STREAM_CAPTURE:
 150                return &chip->capture;
 151        default:
 152                snd_BUG();
 153                return NULL;
 154        }
 155}
 156
 157/*
 158 * wait while run status is on
 159 */
 160static inline void
 161snd_pmac_wait_ack(struct pmac_stream *rec)
 162{
 163        int timeout = 50000;
 164        while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 165                udelay(1);
 166}
 167
 168/*
 169 * set the format and rate to the chip.
 170 * call the lowlevel function if defined (e.g. for AWACS).
 171 */
 172static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
 173{
 174        /* set up frequency and format */
 175        out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 176        out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 177        if (chip->set_format)
 178                chip->set_format(chip);
 179}
 180
 181/*
 182 * stop the DMA transfer
 183 */
 184static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
 185{
 186        out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 187        snd_pmac_wait_ack(rec);
 188}
 189
 190/*
 191 * set the command pointer address
 192 */
 193static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
 194{
 195        out_le32(&rec->dma->cmdptr, cmd->addr);
 196}
 197
 198/*
 199 * start the DMA
 200 */
 201static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
 202{
 203        out_le32(&rec->dma->control, status | (status << 16));
 204}
 205
 206
 207/*
 208 * prepare playback/capture stream
 209 */
 210static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
 211{
 212        int i;
 213        volatile struct dbdma_cmd __iomem *cp;
 214        struct snd_pcm_runtime *runtime = subs->runtime;
 215        int rate_index;
 216        long offset;
 217        struct pmac_stream *astr;
 218
 219        rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 220        rec->period_size = snd_pcm_lib_period_bytes(subs);
 221        rec->nperiods = rec->dma_size / rec->period_size;
 222        rec->cur_period = 0;
 223        rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 224
 225        /* set up constraints */
 226        astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 227        if (! astr)
 228                return -EINVAL;
 229        astr->cur_freqs = 1 << rate_index;
 230        astr->cur_formats = 1 << runtime->format;
 231        chip->rate_index = rate_index;
 232        chip->format = runtime->format;
 233
 234        /* We really want to execute a DMA stop command, after the AWACS
 235         * is initialized.
 236         * For reasons I don't understand, it stops the hissing noise
 237         * common to many PowerBook G3 systems and random noise otherwise
 238         * captured on iBook2's about every third time. -ReneR
 239         */
 240        spin_lock_irq(&chip->reg_lock);
 241        snd_pmac_dma_stop(rec);
 242        chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
 243        snd_pmac_dma_set_command(rec, &chip->extra_dma);
 244        snd_pmac_dma_run(rec, RUN);
 245        spin_unlock_irq(&chip->reg_lock);
 246        mdelay(5);
 247        spin_lock_irq(&chip->reg_lock);
 248        /* continuous DMA memory type doesn't provide the physical address,
 249         * so we need to resolve the address here...
 250         */
 251        offset = runtime->dma_addr;
 252        for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 253                cp->phy_addr = cpu_to_le32(offset);
 254                cp->req_count = cpu_to_le16(rec->period_size);
 255                /*cp->res_count = cpu_to_le16(0);*/
 256                cp->xfer_status = cpu_to_le16(0);
 257                offset += rec->period_size;
 258        }
 259        /* make loop */
 260        cp->command = cpu_to_le16(DBDMA_NOP + BR_ALWAYS);
 261        cp->cmd_dep = cpu_to_le32(rec->cmd.addr);
 262
 263        snd_pmac_dma_stop(rec);
 264        snd_pmac_dma_set_command(rec, &rec->cmd);
 265        spin_unlock_irq(&chip->reg_lock);
 266
 267        return 0;
 268}
 269
 270
 271/*
 272 * PCM trigger/stop
 273 */
 274static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
 275                                struct snd_pcm_substream *subs, int cmd)
 276{
 277        volatile struct dbdma_cmd __iomem *cp;
 278        int i, command;
 279
 280        switch (cmd) {
 281        case SNDRV_PCM_TRIGGER_START:
 282        case SNDRV_PCM_TRIGGER_RESUME:
 283                if (rec->running)
 284                        return -EBUSY;
 285                command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 286                           OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 287                spin_lock(&chip->reg_lock);
 288                snd_pmac_beep_stop(chip);
 289                snd_pmac_pcm_set_format(chip);
 290                for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 291                        out_le16(&cp->command, command);
 292                snd_pmac_dma_set_command(rec, &rec->cmd);
 293                (void)in_le32(&rec->dma->status);
 294                snd_pmac_dma_run(rec, RUN|WAKE);
 295                rec->running = 1;
 296                spin_unlock(&chip->reg_lock);
 297                break;
 298
 299        case SNDRV_PCM_TRIGGER_STOP:
 300        case SNDRV_PCM_TRIGGER_SUSPEND:
 301                spin_lock(&chip->reg_lock);
 302                rec->running = 0;
 303                /*printk(KERN_DEBUG "stopped!!\n");*/
 304                snd_pmac_dma_stop(rec);
 305                for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 306                        out_le16(&cp->command, DBDMA_STOP);
 307                spin_unlock(&chip->reg_lock);
 308                break;
 309
 310        default:
 311                return -EINVAL;
 312        }
 313
 314        return 0;
 315}
 316
 317/*
 318 * return the current pointer
 319 */
 320inline
 321static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
 322                                              struct pmac_stream *rec,
 323                                              struct snd_pcm_substream *subs)
 324{
 325        int count = 0;
 326
 327#if 1 /* hmm.. how can we get the current dma pointer?? */
 328        int stat;
 329        volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
 330        stat = le16_to_cpu(cp->xfer_status);
 331        if (stat & (ACTIVE|DEAD)) {
 332                count = in_le16(&cp->res_count);
 333                if (count)
 334                        count = rec->period_size - count;
 335        }
 336#endif
 337        count += rec->cur_period * rec->period_size;
 338        /*printk(KERN_DEBUG "pointer=%d\n", count);*/
 339        return bytes_to_frames(subs->runtime, count);
 340}
 341
 342/*
 343 * playback
 344 */
 345
 346static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
 347{
 348        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 349        return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
 350}
 351
 352static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
 353                                     int cmd)
 354{
 355        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 356        return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
 357}
 358
 359static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
 360{
 361        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 362        return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
 363}
 364
 365
 366/*
 367 * capture
 368 */
 369
 370static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
 371{
 372        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 373        return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
 374}
 375
 376static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
 377                                    int cmd)
 378{
 379        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 380        return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
 381}
 382
 383static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
 384{
 385        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 386        return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
 387}
 388
 389
 390/*
 391 * Handle DEAD DMA transfers:
 392 * if the TX status comes up "DEAD" - reported on some Power Computing machines
 393 * we need to re-start the dbdma - but from a different physical start address
 394 * and with a different transfer length.  It would get very messy to do this
 395 * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
 396 * addresses each time.  So, we will keep a single dbdma_cmd block which can be
 397 * fiddled with.
 398 * When DEAD status is first reported the content of the faulted dbdma block is
 399 * copied into the emergency buffer and we note that the buffer is in use.
 400 * we then bump the start physical address by the amount that was successfully
 401 * output before it died.
 402 * On any subsequent DEAD result we just do the bump-ups (we know that we are
 403 * already using the emergency dbdma_cmd).
 404 * CHECK: this just tries to "do it".  It is possible that we should abandon
 405 * xfers when the number of residual bytes gets below a certain value - I can
 406 * see that this might cause a loop-forever if a too small transfer causes
 407 * DEAD status.  However this is a TODO for now - we'll see what gets reported.
 408 * When we get a successful transfer result with the emergency buffer we just
 409 * pretend that it completed using the original dmdma_cmd and carry on.  The
 410 * 'next_cmd' field will already point back to the original loop of blocks.
 411 */
 412static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
 413                                          volatile struct dbdma_cmd __iomem *cp)
 414{
 415        unsigned short req, res ;
 416        unsigned int phy ;
 417
 418        /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
 419
 420        /* to clear DEAD status we must first clear RUN
 421           set it to quiescent to be on the safe side */
 422        (void)in_le32(&rec->dma->status);
 423        out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
 424
 425        if (!emergency_in_use) { /* new problem */
 426                memcpy((void *)emergency_dbdma.cmds, (void *)cp,
 427                       sizeof(struct dbdma_cmd));
 428                emergency_in_use = 1;
 429                cp->xfer_status = cpu_to_le16(0);
 430                cp->req_count = cpu_to_le16(rec->period_size);
 431                cp = emergency_dbdma.cmds;
 432        }
 433
 434        /* now bump the values to reflect the amount
 435           we haven't yet shifted */
 436        req = le16_to_cpu(cp->req_count);
 437        res = le16_to_cpu(cp->res_count);
 438        phy = le32_to_cpu(cp->phy_addr);
 439        phy += (req - res);
 440        cp->req_count = cpu_to_le16(res);
 441        cp->res_count = cpu_to_le16(0);
 442        cp->xfer_status = cpu_to_le16(0);
 443        cp->phy_addr = cpu_to_le32(phy);
 444
 445        cp->cmd_dep = cpu_to_le32(rec->cmd.addr
 446                + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
 447
 448        cp->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
 449
 450        /* point at our patched up command block */
 451        out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
 452
 453        /* we must re-start the controller */
 454        (void)in_le32(&rec->dma->status);
 455        /* should complete clearing the DEAD status */
 456        out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
 457}
 458
 459/*
 460 * update playback/capture pointer from interrupts
 461 */
 462static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
 463{
 464        volatile struct dbdma_cmd __iomem *cp;
 465        int c;
 466        int stat;
 467
 468        spin_lock(&chip->reg_lock);
 469        if (rec->running) {
 470                for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
 471
 472                        if (emergency_in_use)   /* already using DEAD xfer? */
 473                                cp = emergency_dbdma.cmds;
 474                        else
 475                                cp = &rec->cmd.cmds[rec->cur_period];
 476
 477                        stat = le16_to_cpu(cp->xfer_status);
 478
 479                        if (stat & DEAD) {
 480                                snd_pmac_pcm_dead_xfer(rec, cp);
 481                                break; /* this block is still going */
 482                        }
 483
 484                        if (emergency_in_use)
 485                                emergency_in_use = 0 ; /* done that */
 486
 487                        if (! (stat & ACTIVE))
 488                                break;
 489
 490                        /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
 491                        cp->xfer_status = cpu_to_le16(0);
 492                        cp->req_count = cpu_to_le16(rec->period_size);
 493                        /*cp->res_count = cpu_to_le16(0);*/
 494                        rec->cur_period++;
 495                        if (rec->cur_period >= rec->nperiods) {
 496                                rec->cur_period = 0;
 497                        }
 498
 499                        spin_unlock(&chip->reg_lock);
 500                        snd_pcm_period_elapsed(rec->substream);
 501                        spin_lock(&chip->reg_lock);
 502                }
 503        }
 504        spin_unlock(&chip->reg_lock);
 505}
 506
 507
 508/*
 509 * hw info
 510 */
 511
 512static const struct snd_pcm_hardware snd_pmac_playback =
 513{
 514        .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 515                                 SNDRV_PCM_INFO_MMAP |
 516                                 SNDRV_PCM_INFO_MMAP_VALID |
 517                                 SNDRV_PCM_INFO_RESUME),
 518        .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 519        .rates =                SNDRV_PCM_RATE_8000_44100,
 520        .rate_min =             7350,
 521        .rate_max =             44100,
 522        .channels_min =         2,
 523        .channels_max =         2,
 524        .buffer_bytes_max =     131072,
 525        .period_bytes_min =     256,
 526        .period_bytes_max =     16384,
 527        .periods_min =          3,
 528        .periods_max =          PMAC_MAX_FRAGS,
 529};
 530
 531static const struct snd_pcm_hardware snd_pmac_capture =
 532{
 533        .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 534                                 SNDRV_PCM_INFO_MMAP |
 535                                 SNDRV_PCM_INFO_MMAP_VALID |
 536                                 SNDRV_PCM_INFO_RESUME),
 537        .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 538        .rates =                SNDRV_PCM_RATE_8000_44100,
 539        .rate_min =             7350,
 540        .rate_max =             44100,
 541        .channels_min =         2,
 542        .channels_max =         2,
 543        .buffer_bytes_max =     131072,
 544        .period_bytes_min =     256,
 545        .period_bytes_max =     16384,
 546        .periods_min =          3,
 547        .periods_max =          PMAC_MAX_FRAGS,
 548};
 549
 550
 551#if 0 // NYI
 552static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
 553                                 struct snd_pcm_hw_rule *rule)
 554{
 555        struct snd_pmac *chip = rule->private;
 556        struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 557        int i, freq_table[8], num_freqs;
 558
 559        if (! rec)
 560                return -EINVAL;
 561        num_freqs = 0;
 562        for (i = chip->num_freqs - 1; i >= 0; i--) {
 563                if (rec->cur_freqs & (1 << i))
 564                        freq_table[num_freqs++] = chip->freq_table[i];
 565        }
 566
 567        return snd_interval_list(hw_param_interval(params, rule->var),
 568                                 num_freqs, freq_table, 0);
 569}
 570
 571static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
 572                                   struct snd_pcm_hw_rule *rule)
 573{
 574        struct snd_pmac *chip = rule->private;
 575        struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 576
 577        if (! rec)
 578                return -EINVAL;
 579        return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 580                                   rec->cur_formats);
 581}
 582#endif // NYI
 583
 584static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
 585                             struct snd_pcm_substream *subs)
 586{
 587        struct snd_pcm_runtime *runtime = subs->runtime;
 588        int i;
 589
 590        /* look up frequency table and fill bit mask */
 591        runtime->hw.rates = 0;
 592        for (i = 0; i < chip->num_freqs; i++)
 593                if (chip->freqs_ok & (1 << i))
 594                        runtime->hw.rates |=
 595                                snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
 596
 597        /* check for minimum and maximum rates */
 598        for (i = 0; i < chip->num_freqs; i++) {
 599                if (chip->freqs_ok & (1 << i)) {
 600                        runtime->hw.rate_max = chip->freq_table[i];
 601                        break;
 602                }
 603        }
 604        for (i = chip->num_freqs - 1; i >= 0; i--) {
 605                if (chip->freqs_ok & (1 << i)) {
 606                        runtime->hw.rate_min = chip->freq_table[i];
 607                        break;
 608                }
 609        }
 610        runtime->hw.formats = chip->formats_ok;
 611        if (chip->can_capture) {
 612                if (! chip->can_duplex)
 613                        runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 614                runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 615        }
 616        runtime->private_data = rec;
 617        rec->substream = subs;
 618
 619#if 0 /* FIXME: still under development.. */
 620        snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 621                            snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 622        snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 623                            snd_pmac_hw_rule_format, chip, rec->stream, -1);
 624#endif
 625
 626        runtime->hw.periods_max = rec->cmd.size - 1;
 627
 628        /* constraints to fix choppy sound */
 629        snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 630        return 0;
 631}
 632
 633static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
 634                              struct snd_pcm_substream *subs)
 635{
 636        struct pmac_stream *astr;
 637
 638        snd_pmac_dma_stop(rec);
 639
 640        astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 641        if (! astr)
 642                return -EINVAL;
 643
 644        /* reset constraints */
 645        astr->cur_freqs = chip->freqs_ok;
 646        astr->cur_formats = chip->formats_ok;
 647
 648        return 0;
 649}
 650
 651static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
 652{
 653        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 654
 655        subs->runtime->hw = snd_pmac_playback;
 656        return snd_pmac_pcm_open(chip, &chip->playback, subs);
 657}
 658
 659static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
 660{
 661        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 662
 663        subs->runtime->hw = snd_pmac_capture;
 664        return snd_pmac_pcm_open(chip, &chip->capture, subs);
 665}
 666
 667static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
 668{
 669        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 670
 671        return snd_pmac_pcm_close(chip, &chip->playback, subs);
 672}
 673
 674static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
 675{
 676        struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 677
 678        return snd_pmac_pcm_close(chip, &chip->capture, subs);
 679}
 680
 681/*
 682 */
 683
 684static const struct snd_pcm_ops snd_pmac_playback_ops = {
 685        .open =         snd_pmac_playback_open,
 686        .close =        snd_pmac_playback_close,
 687        .ioctl =        snd_pcm_lib_ioctl,
 688        .hw_params =    snd_pmac_pcm_hw_params,
 689        .hw_free =      snd_pmac_pcm_hw_free,
 690        .prepare =      snd_pmac_playback_prepare,
 691        .trigger =      snd_pmac_playback_trigger,
 692        .pointer =      snd_pmac_playback_pointer,
 693};
 694
 695static const struct snd_pcm_ops snd_pmac_capture_ops = {
 696        .open =         snd_pmac_capture_open,
 697        .close =        snd_pmac_capture_close,
 698        .ioctl =        snd_pcm_lib_ioctl,
 699        .hw_params =    snd_pmac_pcm_hw_params,
 700        .hw_free =      snd_pmac_pcm_hw_free,
 701        .prepare =      snd_pmac_capture_prepare,
 702        .trigger =      snd_pmac_capture_trigger,
 703        .pointer =      snd_pmac_capture_pointer,
 704};
 705
 706int snd_pmac_pcm_new(struct snd_pmac *chip)
 707{
 708        struct snd_pcm *pcm;
 709        int err;
 710        int num_captures = 1;
 711
 712        if (! chip->can_capture)
 713                num_captures = 0;
 714        err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 715        if (err < 0)
 716                return err;
 717
 718        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 719        if (chip->can_capture)
 720                snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 721
 722        pcm->private_data = chip;
 723        pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 724        strcpy(pcm->name, chip->card->shortname);
 725        chip->pcm = pcm;
 726
 727        chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 728        if (chip->can_byte_swap)
 729                chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 730
 731        chip->playback.cur_formats = chip->formats_ok;
 732        chip->capture.cur_formats = chip->formats_ok;
 733        chip->playback.cur_freqs = chip->freqs_ok;
 734        chip->capture.cur_freqs = chip->freqs_ok;
 735
 736        /* preallocate 64k buffer */
 737        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 738                                              &chip->pdev->dev,
 739                                              64 * 1024, 64 * 1024);
 740
 741        return 0;
 742}
 743
 744
 745static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
 746{
 747        out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 748        snd_pmac_wait_ack(&chip->playback);
 749        out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 750        snd_pmac_wait_ack(&chip->capture);
 751}
 752
 753
 754/*
 755 * handling beep
 756 */
 757void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
 758{
 759        struct pmac_stream *rec = &chip->playback;
 760
 761        snd_pmac_dma_stop(rec);
 762        chip->extra_dma.cmds->req_count = cpu_to_le16(bytes);
 763        chip->extra_dma.cmds->xfer_status = cpu_to_le16(0);
 764        chip->extra_dma.cmds->cmd_dep = cpu_to_le32(chip->extra_dma.addr);
 765        chip->extra_dma.cmds->phy_addr = cpu_to_le32(addr);
 766        chip->extra_dma.cmds->command = cpu_to_le16(OUTPUT_MORE + BR_ALWAYS);
 767        out_le32(&chip->awacs->control,
 768                 (in_le32(&chip->awacs->control) & ~0x1f00)
 769                 | (speed << 8));
 770        out_le32(&chip->awacs->byteswap, 0);
 771        snd_pmac_dma_set_command(rec, &chip->extra_dma);
 772        snd_pmac_dma_run(rec, RUN);
 773}
 774
 775void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
 776{
 777        snd_pmac_dma_stop(&chip->playback);
 778        chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
 779        snd_pmac_pcm_set_format(chip); /* reset format */
 780}
 781
 782
 783/*
 784 * interrupt handlers
 785 */
 786static irqreturn_t
 787snd_pmac_tx_intr(int irq, void *devid)
 788{
 789        struct snd_pmac *chip = devid;
 790        snd_pmac_pcm_update(chip, &chip->playback);
 791        return IRQ_HANDLED;
 792}
 793
 794
 795static irqreturn_t
 796snd_pmac_rx_intr(int irq, void *devid)
 797{
 798        struct snd_pmac *chip = devid;
 799        snd_pmac_pcm_update(chip, &chip->capture);
 800        return IRQ_HANDLED;
 801}
 802
 803
 804static irqreturn_t
 805snd_pmac_ctrl_intr(int irq, void *devid)
 806{
 807        struct snd_pmac *chip = devid;
 808        int ctrl = in_le32(&chip->awacs->control);
 809
 810        /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
 811        if (ctrl & MASK_PORTCHG) {
 812                /* do something when headphone is plugged/unplugged? */
 813                if (chip->update_automute)
 814                        chip->update_automute(chip, 1);
 815        }
 816        if (ctrl & MASK_CNTLERR) {
 817                int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 818                if (err && chip->model <= PMAC_SCREAMER)
 819                        snd_printk(KERN_DEBUG "error %x\n", err);
 820        }
 821        /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 822        out_le32(&chip->awacs->control, ctrl);
 823        return IRQ_HANDLED;
 824}
 825
 826
 827/*
 828 * a wrapper to feature call for compatibility
 829 */
 830static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
 831{
 832        if (ppc_md.feature_call)
 833                ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 834}
 835
 836/*
 837 * release resources
 838 */
 839
 840static int snd_pmac_free(struct snd_pmac *chip)
 841{
 842        /* stop sounds */
 843        if (chip->initialized) {
 844                snd_pmac_dbdma_reset(chip);
 845                /* disable interrupts from awacs interface */
 846                out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 847        }
 848
 849        if (chip->node)
 850                snd_pmac_sound_feature(chip, 0);
 851
 852        /* clean up mixer if any */
 853        if (chip->mixer_free)
 854                chip->mixer_free(chip);
 855
 856        snd_pmac_detach_beep(chip);
 857
 858        /* release resources */
 859        if (chip->irq >= 0)
 860                free_irq(chip->irq, (void*)chip);
 861        if (chip->tx_irq >= 0)
 862                free_irq(chip->tx_irq, (void*)chip);
 863        if (chip->rx_irq >= 0)
 864                free_irq(chip->rx_irq, (void*)chip);
 865        snd_pmac_dbdma_free(chip, &chip->playback.cmd);
 866        snd_pmac_dbdma_free(chip, &chip->capture.cmd);
 867        snd_pmac_dbdma_free(chip, &chip->extra_dma);
 868        snd_pmac_dbdma_free(chip, &emergency_dbdma);
 869        iounmap(chip->macio_base);
 870        iounmap(chip->latch_base);
 871        iounmap(chip->awacs);
 872        iounmap(chip->playback.dma);
 873        iounmap(chip->capture.dma);
 874
 875        if (chip->node) {
 876                int i;
 877                for (i = 0; i < 3; i++) {
 878                        if (chip->requested & (1 << i))
 879                                release_mem_region(chip->rsrc[i].start,
 880                                                   resource_size(&chip->rsrc[i]));
 881                }
 882        }
 883
 884        pci_dev_put(chip->pdev);
 885        of_node_put(chip->node);
 886        kfree(chip);
 887        return 0;
 888}
 889
 890
 891/*
 892 * free the device
 893 */
 894static int snd_pmac_dev_free(struct snd_device *device)
 895{
 896        struct snd_pmac *chip = device->device_data;
 897        return snd_pmac_free(chip);
 898}
 899
 900
 901/*
 902 * check the machine support byteswap (little-endian)
 903 */
 904
 905static void detect_byte_swap(struct snd_pmac *chip)
 906{
 907        struct device_node *mio;
 908
 909        /* if seems that Keylargo can't byte-swap  */
 910        for (mio = chip->node->parent; mio; mio = mio->parent) {
 911                if (strcmp(mio->name, "mac-io") == 0) {
 912                        if (of_device_is_compatible(mio, "Keylargo"))
 913                                chip->can_byte_swap = 0;
 914                        break;
 915                }
 916        }
 917
 918        /* it seems the Pismo & iBook can't byte-swap in hardware. */
 919        if (of_machine_is_compatible("PowerBook3,1") ||
 920            of_machine_is_compatible("PowerBook2,1"))
 921                chip->can_byte_swap = 0 ;
 922
 923        if (of_machine_is_compatible("PowerBook2,1"))
 924                chip->can_duplex = 0;
 925}
 926
 927
 928/*
 929 * detect a sound chip
 930 */
 931static int snd_pmac_detect(struct snd_pmac *chip)
 932{
 933        struct device_node *sound;
 934        struct device_node *dn;
 935        const unsigned int *prop;
 936        unsigned int l;
 937        struct macio_chip* macio;
 938
 939        if (!machine_is(powermac))
 940                return -ENODEV;
 941
 942        chip->subframe = 0;
 943        chip->revision = 0;
 944        chip->freqs_ok = 0xff; /* all ok */
 945        chip->model = PMAC_AWACS;
 946        chip->can_byte_swap = 1;
 947        chip->can_duplex = 1;
 948        chip->can_capture = 1;
 949        chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 950        chip->freq_table = awacs_freqs;
 951        chip->pdev = NULL;
 952
 953        chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 954
 955        /* check machine type */
 956        if (of_machine_is_compatible("AAPL,3400/2400")
 957            || of_machine_is_compatible("AAPL,3500"))
 958                chip->is_pbook_3400 = 1;
 959        else if (of_machine_is_compatible("PowerBook1,1")
 960                 || of_machine_is_compatible("AAPL,PowerBook1998"))
 961                chip->is_pbook_G3 = 1;
 962        chip->node = of_find_node_by_name(NULL, "awacs");
 963        sound = of_node_get(chip->node);
 964
 965        /*
 966         * powermac G3 models have a node called "davbus"
 967         * with a child called "sound".
 968         */
 969        if (!chip->node)
 970                chip->node = of_find_node_by_name(NULL, "davbus");
 971        /*
 972         * if we didn't find a davbus device, try 'i2s-a' since
 973         * this seems to be what iBooks have
 974         */
 975        if (! chip->node) {
 976                chip->node = of_find_node_by_name(NULL, "i2s-a");
 977                if (chip->node && chip->node->parent &&
 978                    chip->node->parent->parent) {
 979                        if (of_device_is_compatible(chip->node->parent->parent,
 980                                                 "K2-Keylargo"))
 981                                chip->is_k2 = 1;
 982                }
 983        }
 984        if (! chip->node)
 985                return -ENODEV;
 986
 987        if (!sound) {
 988                for_each_node_by_name(sound, "sound")
 989                        if (sound->parent == chip->node)
 990                                break;
 991        }
 992        if (! sound) {
 993                of_node_put(chip->node);
 994                chip->node = NULL;
 995                return -ENODEV;
 996        }
 997        prop = of_get_property(sound, "sub-frame", NULL);
 998        if (prop && *prop < 16)
 999                chip->subframe = *prop;
1000        prop = of_get_property(sound, "layout-id", NULL);
1001        if (prop) {
1002                /* partly deprecate snd-powermac, for those machines
1003                 * that have a layout-id property for now */
1004                printk(KERN_INFO "snd-powermac no longer handles any "
1005                                 "machines with a layout-id property "
1006                                 "in the device-tree, use snd-aoa.\n");
1007                of_node_put(sound);
1008                of_node_put(chip->node);
1009                chip->node = NULL;
1010                return -ENODEV;
1011        }
1012        /* This should be verified on older screamers */
1013        if (of_device_is_compatible(sound, "screamer")) {
1014                chip->model = PMAC_SCREAMER;
1015                // chip->can_byte_swap = 0; /* FIXME: check this */
1016        }
1017        if (of_device_is_compatible(sound, "burgundy")) {
1018                chip->model = PMAC_BURGUNDY;
1019                chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1020        }
1021        if (of_device_is_compatible(sound, "daca")) {
1022                chip->model = PMAC_DACA;
1023                chip->can_capture = 0;  /* no capture */
1024                chip->can_duplex = 0;
1025                // chip->can_byte_swap = 0; /* FIXME: check this */
1026                chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1027        }
1028        if (of_device_is_compatible(sound, "tumbler")) {
1029                chip->model = PMAC_TUMBLER;
1030                chip->can_capture = of_machine_is_compatible("PowerMac4,2")
1031                                || of_machine_is_compatible("PowerBook3,2")
1032                                || of_machine_is_compatible("PowerBook3,3")
1033                                || of_machine_is_compatible("PowerBook4,1")
1034                                || of_machine_is_compatible("PowerBook4,2")
1035                                || of_machine_is_compatible("PowerBook4,3");
1036                chip->can_duplex = 0;
1037                // chip->can_byte_swap = 0; /* FIXME: check this */
1038                chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1039                chip->freq_table = tumbler_freqs;
1040                chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1041        }
1042        if (of_device_is_compatible(sound, "snapper")) {
1043                chip->model = PMAC_SNAPPER;
1044                // chip->can_byte_swap = 0; /* FIXME: check this */
1045                chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1046                chip->freq_table = tumbler_freqs;
1047                chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1048        }
1049        prop = of_get_property(sound, "device-id", NULL);
1050        if (prop)
1051                chip->device_id = *prop;
1052        dn = of_find_node_by_name(NULL, "perch");
1053        chip->has_iic = (dn != NULL);
1054        of_node_put(dn);
1055
1056        /* We need the PCI device for DMA allocations, let's use a crude method
1057         * for now ...
1058         */
1059        macio = macio_find(chip->node, macio_unknown);
1060        if (macio == NULL)
1061                printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1062        else {
1063                struct pci_dev *pdev = NULL;
1064
1065                for_each_pci_dev(pdev) {
1066                        struct device_node *np = pci_device_to_OF_node(pdev);
1067                        if (np && np == macio->of_node) {
1068                                chip->pdev = pdev;
1069                                break;
1070                        }
1071                }
1072        }
1073        if (chip->pdev == NULL)
1074                printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1075                       " device !\n");
1076
1077        detect_byte_swap(chip);
1078
1079        /* look for a property saying what sample rates
1080           are available */
1081        prop = of_get_property(sound, "sample-rates", &l);
1082        if (! prop)
1083                prop = of_get_property(sound, "output-frame-rates", &l);
1084        if (prop) {
1085                int i;
1086                chip->freqs_ok = 0;
1087                for (l /= sizeof(int); l > 0; --l) {
1088                        unsigned int r = *prop++;
1089                        /* Apple 'Fixed' format */
1090                        if (r >= 0x10000)
1091                                r >>= 16;
1092                        for (i = 0; i < chip->num_freqs; ++i) {
1093                                if (r == chip->freq_table[i]) {
1094                                        chip->freqs_ok |= (1 << i);
1095                                        break;
1096                                }
1097                        }
1098                }
1099        } else {
1100                /* assume only 44.1khz */
1101                chip->freqs_ok = 1;
1102        }
1103
1104        of_node_put(sound);
1105        return 0;
1106}
1107
1108#ifdef PMAC_SUPPORT_AUTOMUTE
1109/*
1110 * auto-mute
1111 */
1112static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1113                              struct snd_ctl_elem_value *ucontrol)
1114{
1115        struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1116        ucontrol->value.integer.value[0] = chip->auto_mute;
1117        return 0;
1118}
1119
1120static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1121                              struct snd_ctl_elem_value *ucontrol)
1122{
1123        struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1124        if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1125                chip->auto_mute = !!ucontrol->value.integer.value[0];
1126                if (chip->update_automute)
1127                        chip->update_automute(chip, 1);
1128                return 1;
1129        }
1130        return 0;
1131}
1132
1133static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1134                              struct snd_ctl_elem_value *ucontrol)
1135{
1136        struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1137        if (chip->detect_headphone)
1138                ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1139        else
1140                ucontrol->value.integer.value[0] = 0;
1141        return 0;
1142}
1143
1144static struct snd_kcontrol_new auto_mute_controls[] = {
1145        { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1146          .name = "Auto Mute Switch",
1147          .info = snd_pmac_boolean_mono_info,
1148          .get = pmac_auto_mute_get,
1149          .put = pmac_auto_mute_put,
1150        },
1151        { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1152          .name = "Headphone Detection",
1153          .access = SNDRV_CTL_ELEM_ACCESS_READ,
1154          .info = snd_pmac_boolean_mono_info,
1155          .get = pmac_hp_detect_get,
1156        },
1157};
1158
1159int snd_pmac_add_automute(struct snd_pmac *chip)
1160{
1161        int err;
1162        chip->auto_mute = 1;
1163        err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1164        if (err < 0) {
1165                printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1166                return err;
1167        }
1168        chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1169        return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1170}
1171#endif /* PMAC_SUPPORT_AUTOMUTE */
1172
1173/*
1174 * create and detect a pmac chip record
1175 */
1176int snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1177{
1178        struct snd_pmac *chip;
1179        struct device_node *np;
1180        int i, err;
1181        unsigned int irq;
1182        unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1183        static struct snd_device_ops ops = {
1184                .dev_free =     snd_pmac_dev_free,
1185        };
1186
1187        *chip_return = NULL;
1188
1189        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1190        if (chip == NULL)
1191                return -ENOMEM;
1192        chip->card = card;
1193
1194        spin_lock_init(&chip->reg_lock);
1195        chip->irq = chip->tx_irq = chip->rx_irq = -1;
1196
1197        chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1198        chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1199
1200        if ((err = snd_pmac_detect(chip)) < 0)
1201                goto __error;
1202
1203        if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1204            snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1205            snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1206            snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1207                err = -ENOMEM;
1208                goto __error;
1209        }
1210
1211        np = chip->node;
1212        chip->requested = 0;
1213        if (chip->is_k2) {
1214                static char *rnames[] = {
1215                        "Sound Control", "Sound DMA" };
1216                for (i = 0; i < 2; i ++) {
1217                        if (of_address_to_resource(np->parent, i,
1218                                                   &chip->rsrc[i])) {
1219                                printk(KERN_ERR "snd: can't translate rsrc "
1220                                       " %d (%s)\n", i, rnames[i]);
1221                                err = -ENODEV;
1222                                goto __error;
1223                        }
1224                        if (request_mem_region(chip->rsrc[i].start,
1225                                               resource_size(&chip->rsrc[i]),
1226                                               rnames[i]) == NULL) {
1227                                printk(KERN_ERR "snd: can't request rsrc "
1228                                       " %d (%s: %pR)\n",
1229                                       i, rnames[i], &chip->rsrc[i]);
1230                                err = -ENODEV;
1231                                goto __error;
1232                        }
1233                        chip->requested |= (1 << i);
1234                }
1235                ctrl_addr = chip->rsrc[0].start;
1236                txdma_addr = chip->rsrc[1].start;
1237                rxdma_addr = txdma_addr + 0x100;
1238        } else {
1239                static char *rnames[] = {
1240                        "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1241                for (i = 0; i < 3; i ++) {
1242                        if (of_address_to_resource(np, i,
1243                                                   &chip->rsrc[i])) {
1244                                printk(KERN_ERR "snd: can't translate rsrc "
1245                                       " %d (%s)\n", i, rnames[i]);
1246                                err = -ENODEV;
1247                                goto __error;
1248                        }
1249                        if (request_mem_region(chip->rsrc[i].start,
1250                                               resource_size(&chip->rsrc[i]),
1251                                               rnames[i]) == NULL) {
1252                                printk(KERN_ERR "snd: can't request rsrc "
1253                                       " %d (%s: %pR)\n",
1254                                       i, rnames[i], &chip->rsrc[i]);
1255                                err = -ENODEV;
1256                                goto __error;
1257                        }
1258                        chip->requested |= (1 << i);
1259                }
1260                ctrl_addr = chip->rsrc[0].start;
1261                txdma_addr = chip->rsrc[1].start;
1262                rxdma_addr = chip->rsrc[2].start;
1263        }
1264
1265        chip->awacs = ioremap(ctrl_addr, 0x1000);
1266        chip->playback.dma = ioremap(txdma_addr, 0x100);
1267        chip->capture.dma = ioremap(rxdma_addr, 0x100);
1268        if (chip->model <= PMAC_BURGUNDY) {
1269                irq = irq_of_parse_and_map(np, 0);
1270                if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1271                                "PMac", (void*)chip)) {
1272                        snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1273                                   irq);
1274                        err = -EBUSY;
1275                        goto __error;
1276                }
1277                chip->irq = irq;
1278        }
1279        irq = irq_of_parse_and_map(np, 1);
1280        if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1281                snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1282                err = -EBUSY;
1283                goto __error;
1284        }
1285        chip->tx_irq = irq;
1286        irq = irq_of_parse_and_map(np, 2);
1287        if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1288                snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1289                err = -EBUSY;
1290                goto __error;
1291        }
1292        chip->rx_irq = irq;
1293
1294        snd_pmac_sound_feature(chip, 1);
1295
1296        /* reset & enable interrupts */
1297        if (chip->model <= PMAC_BURGUNDY)
1298                out_le32(&chip->awacs->control, chip->control_mask);
1299
1300        /* Powerbooks have odd ways of enabling inputs such as
1301           an expansion-bay CD or sound from an internal modem
1302           or a PC-card modem. */
1303        if (chip->is_pbook_3400) {
1304                /* Enable CD and PC-card sound inputs. */
1305                /* This is done by reading from address
1306                 * f301a000, + 0x10 to enable the expansion-bay
1307                 * CD sound input, + 0x80 to enable the PC-card
1308                 * sound input.  The 0x100 enables the SCSI bus
1309                 * terminator power.
1310                 */
1311                chip->latch_base = ioremap (0xf301a000, 0x1000);
1312                in_8(chip->latch_base + 0x190);
1313        } else if (chip->is_pbook_G3) {
1314                struct device_node* mio;
1315                for (mio = chip->node->parent; mio; mio = mio->parent) {
1316                        if (strcmp(mio->name, "mac-io") == 0) {
1317                                struct resource r;
1318                                if (of_address_to_resource(mio, 0, &r) == 0)
1319                                        chip->macio_base =
1320                                                ioremap(r.start, 0x40);
1321                                break;
1322                        }
1323                }
1324                /* Enable CD sound input. */
1325                /* The relevant bits for writing to this byte are 0x8f.
1326                 * I haven't found out what the 0x80 bit does.
1327                 * For the 0xf bits, writing 3 or 7 enables the CD
1328                 * input, any other value disables it.  Values
1329                 * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1330                 * 4, 6, 8 - f enable the input from the modem.
1331                 */
1332                if (chip->macio_base)
1333                        out_8(chip->macio_base + 0x37, 3);
1334        }
1335
1336        /* Reset dbdma channels */
1337        snd_pmac_dbdma_reset(chip);
1338
1339        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1340                goto __error;
1341
1342        *chip_return = chip;
1343        return 0;
1344
1345 __error:
1346        snd_pmac_free(chip);
1347        return err;
1348}
1349
1350
1351/*
1352 * sleep notify for powerbook
1353 */
1354
1355#ifdef CONFIG_PM
1356
1357/*
1358 * Save state when going to sleep, restore it afterwards.
1359 */
1360
1361void snd_pmac_suspend(struct snd_pmac *chip)
1362{
1363        unsigned long flags;
1364
1365        snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1366        if (chip->suspend)
1367                chip->suspend(chip);
1368        snd_pcm_suspend_all(chip->pcm);
1369        spin_lock_irqsave(&chip->reg_lock, flags);
1370        snd_pmac_beep_stop(chip);
1371        spin_unlock_irqrestore(&chip->reg_lock, flags);
1372        if (chip->irq >= 0)
1373                disable_irq(chip->irq);
1374        if (chip->tx_irq >= 0)
1375                disable_irq(chip->tx_irq);
1376        if (chip->rx_irq >= 0)
1377                disable_irq(chip->rx_irq);
1378        snd_pmac_sound_feature(chip, 0);
1379}
1380
1381void snd_pmac_resume(struct snd_pmac *chip)
1382{
1383        snd_pmac_sound_feature(chip, 1);
1384        if (chip->resume)
1385                chip->resume(chip);
1386        /* enable CD sound input */
1387        if (chip->macio_base && chip->is_pbook_G3)
1388                out_8(chip->macio_base + 0x37, 3);
1389        else if (chip->is_pbook_3400)
1390                in_8(chip->latch_base + 0x190);
1391
1392        snd_pmac_pcm_set_format(chip);
1393
1394        if (chip->irq >= 0)
1395                enable_irq(chip->irq);
1396        if (chip->tx_irq >= 0)
1397                enable_irq(chip->tx_irq);
1398        if (chip->rx_irq >= 0)
1399                enable_irq(chip->rx_irq);
1400
1401        snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1402}
1403
1404#endif /* CONFIG_PM */
1405
1406