sound/ppc/pmac.c

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This source file includes following definitions.
snd_pmac_dbdma_alloc
snd_pmac_dbdma_free
snd_pmac_rate_index
another_stream
snd_pmac_pcm_hw_params
snd_pmac_pcm_hw_free
snd_pmac_get_stream
snd_pmac_wait_ack
snd_pmac_pcm_set_format
snd_pmac_dma_stop
snd_pmac_dma_set_command
snd_pmac_dma_run
snd_pmac_pcm_prepare
snd_pmac_pcm_trigger
snd_pmac_pcm_pointer
snd_pmac_playback_prepare
snd_pmac_playback_trigger
snd_pmac_playback_pointer
snd_pmac_capture_prepare
snd_pmac_capture_trigger
snd_pmac_capture_pointer
snd_pmac_pcm_dead_xfer
snd_pmac_pcm_update
snd_pmac_hw_rule_rate
snd_pmac_hw_rule_format
snd_pmac_pcm_open
snd_pmac_pcm_close
snd_pmac_playback_open
snd_pmac_capture_open
snd_pmac_playback_close
snd_pmac_capture_close
snd_pmac_pcm_new
snd_pmac_dbdma_reset
snd_pmac_beep_dma_start
snd_pmac_beep_dma_stop
snd_pmac_tx_intr
snd_pmac_rx_intr
snd_pmac_ctrl_intr
snd_pmac_sound_feature
snd_pmac_free
snd_pmac_dev_free
detect_byte_swap
snd_pmac_detect
pmac_auto_mute_get
pmac_auto_mute_put
pmac_hp_detect_get
snd_pmac_add_automute
snd_pmac_new
snd_pmac_suspend
snd_pmac_resume
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * PMac DBDMA lowlevel functions
   4  *
   5  * Copyright (c) by Takashi Iwai <tiwai@suse.de>
   6  * code based on dmasound.c.
   7  */
   8 
   9 
  10 #include <linux/io.h>
  11 #include <asm/irq.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/slab.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/pci.h>
  17 #include <linux/dma-mapping.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_irq.h>
  20 #include <sound/core.h>
  21 #include "pmac.h"
  22 #include <sound/pcm_params.h>
  23 #include <asm/pmac_feature.h>
  24 
  25 
  26 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  27 static int awacs_freqs[8] = {
  28         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  29 };
  30 /* fixed frequency table for tumbler */
  31 static int tumbler_freqs[1] = {
  32         44100
  33 };
  34 
  35 
  36 /*
  37  * we will allocate a single 'emergency' dbdma cmd block to use if the
  38  * tx status comes up "DEAD".  This happens on some PowerComputing Pmac
  39  * clones, either owing to a bug in dbdma or some interaction between
  40  * IDE and sound.  However, this measure would deal with DEAD status if
  41  * it appeared elsewhere.
  42  */
  43 static struct pmac_dbdma emergency_dbdma;
  44 static int emergency_in_use;
  45 
  46 
  47 /*
  48  * allocate DBDMA command arrays
  49  */
  50 static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
  51 {
  52         unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
  53 
  54         rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
  55                                         &rec->dma_base, GFP_KERNEL);
  56         if (rec->space == NULL)
  57                 return -ENOMEM;
  58         rec->size = size;
  59         memset(rec->space, 0, rsize);
  60         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
  61         rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
  62 
  63         return 0;
  64 }
  65 
  66 static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
  67 {
  68         if (rec->space) {
  69                 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
  70 
  71                 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
  72         }
  73 }
  74 
  75 
  76 /*
  77  * pcm stuff
  78  */
  79 
  80 /*
  81  * look up frequency table
  82  */
  83 
  84 unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
  85 {
  86         int i, ok, found;
  87 
  88         ok = rec->cur_freqs;
  89         if (rate > chip->freq_table[0])
  90                 return 0;
  91         found = 0;
  92         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
  93                 if (! (ok & 1)) continue;
  94                 found = i;
  95                 if (rate >= chip->freq_table[i])
  96                         break;
  97         }
  98         return found;
  99 }
 100 
 101 /*
 102  * check whether another stream is active
 103  */
 104 static inline int another_stream(int stream)
 105 {
 106         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 107                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 108 }
 109 
 110 /*
 111  * allocate buffers
 112  */
 113 static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
 114                                   struct snd_pcm_hw_params *hw_params)
 115 {
 116         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 117 }
 118 
 119 /*
 120  * release buffers
 121  */
 122 static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
 123 {
 124         snd_pcm_lib_free_pages(subs);
 125         return 0;
 126 }
 127 
 128 /*
 129  * get a stream of the opposite direction
 130  */
 131 static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
 132 {
 133         switch (stream) {
 134         case SNDRV_PCM_STREAM_PLAYBACK:
 135                 return &chip->playback;
 136         case SNDRV_PCM_STREAM_CAPTURE:
 137                 return &chip->capture;
 138         default:
 139                 snd_BUG();
 140                 return NULL;
 141         }
 142 }
 143 
 144 /*
 145  * wait while run status is on
 146  */
 147 static inline void
 148 snd_pmac_wait_ack(struct pmac_stream *rec)
 149 {
 150         int timeout = 50000;
 151         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 152                 udelay(1);
 153 }
 154 
 155 /*
 156  * set the format and rate to the chip.
 157  * call the lowlevel function if defined (e.g. for AWACS).
 158  */
 159 static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
 160 {
 161         /* set up frequency and format */
 162         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 163         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 164         if (chip->set_format)
 165                 chip->set_format(chip);
 166 }
 167 
 168 /*
 169  * stop the DMA transfer
 170  */
 171 static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
 172 {
 173         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 174         snd_pmac_wait_ack(rec);
 175 }
 176 
 177 /*
 178  * set the command pointer address
 179  */
 180 static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
 181 {
 182         out_le32(&rec->dma->cmdptr, cmd->addr);
 183 }
 184 
 185 /*
 186  * start the DMA
 187  */
 188 static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
 189 {
 190         out_le32(&rec->dma->control, status | (status << 16));
 191 }
 192 
 193 
 194 /*
 195  * prepare playback/capture stream
 196  */
 197 static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
 198 {
 199         int i;
 200         volatile struct dbdma_cmd __iomem *cp;
 201         struct snd_pcm_runtime *runtime = subs->runtime;
 202         int rate_index;
 203         long offset;
 204         struct pmac_stream *astr;
 205 
 206         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 207         rec->period_size = snd_pcm_lib_period_bytes(subs);
 208         rec->nperiods = rec->dma_size / rec->period_size;
 209         rec->cur_period = 0;
 210         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 211 
 212         /* set up constraints */
 213         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 214         if (! astr)
 215                 return -EINVAL;
 216         astr->cur_freqs = 1 << rate_index;
 217         astr->cur_formats = 1 << runtime->format;
 218         chip->rate_index = rate_index;
 219         chip->format = runtime->format;
 220 
 221         /* We really want to execute a DMA stop command, after the AWACS
 222          * is initialized.
 223          * For reasons I don't understand, it stops the hissing noise
 224          * common to many PowerBook G3 systems and random noise otherwise
 225          * captured on iBook2's about every third time. -ReneR
 226          */
 227         spin_lock_irq(&chip->reg_lock);
 228         snd_pmac_dma_stop(rec);
 229         chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
 230         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 231         snd_pmac_dma_run(rec, RUN);
 232         spin_unlock_irq(&chip->reg_lock);
 233         mdelay(5);
 234         spin_lock_irq(&chip->reg_lock);
 235         /* continuous DMA memory type doesn't provide the physical address,
 236          * so we need to resolve the address here...
 237          */
 238         offset = runtime->dma_addr;
 239         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 240                 cp->phy_addr = cpu_to_le32(offset);
 241                 cp->req_count = cpu_to_le16(rec->period_size);
 242                 /*cp->res_count = cpu_to_le16(0);*/
 243                 cp->xfer_status = cpu_to_le16(0);
 244                 offset += rec->period_size;
 245         }
 246         /* make loop */
 247         cp->command = cpu_to_le16(DBDMA_NOP + BR_ALWAYS);
 248         cp->cmd_dep = cpu_to_le32(rec->cmd.addr);
 249 
 250         snd_pmac_dma_stop(rec);
 251         snd_pmac_dma_set_command(rec, &rec->cmd);
 252         spin_unlock_irq(&chip->reg_lock);
 253 
 254         return 0;
 255 }
 256 
 257 
 258 /*
 259  * PCM trigger/stop
 260  */
 261 static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
 262                                 struct snd_pcm_substream *subs, int cmd)
 263 {
 264         volatile struct dbdma_cmd __iomem *cp;
 265         int i, command;
 266 
 267         switch (cmd) {
 268         case SNDRV_PCM_TRIGGER_START:
 269         case SNDRV_PCM_TRIGGER_RESUME:
 270                 if (rec->running)
 271                         return -EBUSY;
 272                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 273                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 274                 spin_lock(&chip->reg_lock);
 275                 snd_pmac_beep_stop(chip);
 276                 snd_pmac_pcm_set_format(chip);
 277                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 278                         out_le16(&cp->command, command);
 279                 snd_pmac_dma_set_command(rec, &rec->cmd);
 280                 (void)in_le32(&rec->dma->status);
 281                 snd_pmac_dma_run(rec, RUN|WAKE);
 282                 rec->running = 1;
 283                 spin_unlock(&chip->reg_lock);
 284                 break;
 285 
 286         case SNDRV_PCM_TRIGGER_STOP:
 287         case SNDRV_PCM_TRIGGER_SUSPEND:
 288                 spin_lock(&chip->reg_lock);
 289                 rec->running = 0;
 290                 /*printk(KERN_DEBUG "stopped!!\n");*/
 291                 snd_pmac_dma_stop(rec);
 292                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 293                         out_le16(&cp->command, DBDMA_STOP);
 294                 spin_unlock(&chip->reg_lock);
 295                 break;
 296 
 297         default:
 298                 return -EINVAL;
 299         }
 300 
 301         return 0;
 302 }
 303 
 304 /*
 305  * return the current pointer
 306  */
 307 inline
 308 static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
 309                                               struct pmac_stream *rec,
 310                                               struct snd_pcm_substream *subs)
 311 {
 312         int count = 0;
 313 
 314 #if 1 /* hmm.. how can we get the current dma pointer?? */
 315         int stat;
 316         volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
 317         stat = le16_to_cpu(cp->xfer_status);
 318         if (stat & (ACTIVE|DEAD)) {
 319                 count = in_le16(&cp->res_count);
 320                 if (count)
 321                         count = rec->period_size - count;
 322         }
 323 #endif
 324         count += rec->cur_period * rec->period_size;
 325         /*printk(KERN_DEBUG "pointer=%d\n", count);*/
 326         return bytes_to_frames(subs->runtime, count);
 327 }
 328 
 329 /*
 330  * playback
 331  */
 332 
 333 static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
 334 {
 335         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 336         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
 337 }
 338 
 339 static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
 340                                      int cmd)
 341 {
 342         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 343         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
 344 }
 345 
 346 static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
 347 {
 348         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 349         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
 350 }
 351 
 352 
 353 /*
 354  * capture
 355  */
 356 
 357 static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
 358 {
 359         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 360         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
 361 }
 362 
 363 static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
 364                                     int cmd)
 365 {
 366         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 367         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
 368 }
 369 
 370 static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
 371 {
 372         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 373         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
 374 }
 375 
 376 
 377 /*
 378  * Handle DEAD DMA transfers:
 379  * if the TX status comes up "DEAD" - reported on some Power Computing machines
 380  * we need to re-start the dbdma - but from a different physical start address
 381  * and with a different transfer length.  It would get very messy to do this
 382  * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
 383  * addresses each time.  So, we will keep a single dbdma_cmd block which can be
 384  * fiddled with.
 385  * When DEAD status is first reported the content of the faulted dbdma block is
 386  * copied into the emergency buffer and we note that the buffer is in use.
 387  * we then bump the start physical address by the amount that was successfully
 388  * output before it died.
 389  * On any subsequent DEAD result we just do the bump-ups (we know that we are
 390  * already using the emergency dbdma_cmd).
 391  * CHECK: this just tries to "do it".  It is possible that we should abandon
 392  * xfers when the number of residual bytes gets below a certain value - I can
 393  * see that this might cause a loop-forever if a too small transfer causes
 394  * DEAD status.  However this is a TODO for now - we'll see what gets reported.
 395  * When we get a successful transfer result with the emergency buffer we just
 396  * pretend that it completed using the original dmdma_cmd and carry on.  The
 397  * 'next_cmd' field will already point back to the original loop of blocks.
 398  */
 399 static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
 400                                           volatile struct dbdma_cmd __iomem *cp)
 401 {
 402         unsigned short req, res ;
 403         unsigned int phy ;
 404 
 405         /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
 406 
 407         /* to clear DEAD status we must first clear RUN
 408            set it to quiescent to be on the safe side */
 409         (void)in_le32(&rec->dma->status);
 410         out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
 411 
 412         if (!emergency_in_use) { /* new problem */
 413                 memcpy((void *)emergency_dbdma.cmds, (void *)cp,
 414                        sizeof(struct dbdma_cmd));
 415                 emergency_in_use = 1;
 416                 cp->xfer_status = cpu_to_le16(0);
 417                 cp->req_count = cpu_to_le16(rec->period_size);
 418                 cp = emergency_dbdma.cmds;
 419         }
 420 
 421         /* now bump the values to reflect the amount
 422            we haven't yet shifted */
 423         req = le16_to_cpu(cp->req_count);
 424         res = le16_to_cpu(cp->res_count);
 425         phy = le32_to_cpu(cp->phy_addr);
 426         phy += (req - res);
 427         cp->req_count = cpu_to_le16(res);
 428         cp->res_count = cpu_to_le16(0);
 429         cp->xfer_status = cpu_to_le16(0);
 430         cp->phy_addr = cpu_to_le32(phy);
 431 
 432         cp->cmd_dep = cpu_to_le32(rec->cmd.addr
 433                 + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
 434 
 435         cp->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
 436 
 437         /* point at our patched up command block */
 438         out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
 439 
 440         /* we must re-start the controller */
 441         (void)in_le32(&rec->dma->status);
 442         /* should complete clearing the DEAD status */
 443         out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
 444 }
 445 
 446 /*
 447  * update playback/capture pointer from interrupts
 448  */
 449 static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
 450 {
 451         volatile struct dbdma_cmd __iomem *cp;
 452         int c;
 453         int stat;
 454 
 455         spin_lock(&chip->reg_lock);
 456         if (rec->running) {
 457                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
 458 
 459                         if (emergency_in_use)   /* already using DEAD xfer? */
 460                                 cp = emergency_dbdma.cmds;
 461                         else
 462                                 cp = &rec->cmd.cmds[rec->cur_period];
 463 
 464                         stat = le16_to_cpu(cp->xfer_status);
 465 
 466                         if (stat & DEAD) {
 467                                 snd_pmac_pcm_dead_xfer(rec, cp);
 468                                 break; /* this block is still going */
 469                         }
 470 
 471                         if (emergency_in_use)
 472                                 emergency_in_use = 0 ; /* done that */
 473 
 474                         if (! (stat & ACTIVE))
 475                                 break;
 476 
 477                         /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
 478                         cp->xfer_status = cpu_to_le16(0);
 479                         cp->req_count = cpu_to_le16(rec->period_size);
 480                         /*cp->res_count = cpu_to_le16(0);*/
 481                         rec->cur_period++;
 482                         if (rec->cur_period >= rec->nperiods) {
 483                                 rec->cur_period = 0;
 484                         }
 485 
 486                         spin_unlock(&chip->reg_lock);
 487                         snd_pcm_period_elapsed(rec->substream);
 488                         spin_lock(&chip->reg_lock);
 489                 }
 490         }
 491         spin_unlock(&chip->reg_lock);
 492 }
 493 
 494 
 495 /*
 496  * hw info
 497  */
 498 
 499 static const struct snd_pcm_hardware snd_pmac_playback =
 500 {
 501         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 502                                  SNDRV_PCM_INFO_MMAP |
 503                                  SNDRV_PCM_INFO_MMAP_VALID |
 504                                  SNDRV_PCM_INFO_RESUME),
 505         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 506         .rates =                SNDRV_PCM_RATE_8000_44100,
 507         .rate_min =             7350,
 508         .rate_max =             44100,
 509         .channels_min =         2,
 510         .channels_max =         2,
 511         .buffer_bytes_max =     131072,
 512         .period_bytes_min =     256,
 513         .period_bytes_max =     16384,
 514         .periods_min =          3,
 515         .periods_max =          PMAC_MAX_FRAGS,
 516 };
 517 
 518 static const struct snd_pcm_hardware snd_pmac_capture =
 519 {
 520         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 521                                  SNDRV_PCM_INFO_MMAP |
 522                                  SNDRV_PCM_INFO_MMAP_VALID |
 523                                  SNDRV_PCM_INFO_RESUME),
 524         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 525         .rates =                SNDRV_PCM_RATE_8000_44100,
 526         .rate_min =             7350,
 527         .rate_max =             44100,
 528         .channels_min =         2,
 529         .channels_max =         2,
 530         .buffer_bytes_max =     131072,
 531         .period_bytes_min =     256,
 532         .period_bytes_max =     16384,
 533         .periods_min =          3,
 534         .periods_max =          PMAC_MAX_FRAGS,
 535 };
 536 
 537 
 538 #if 0 // NYI
 539 static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
 540                                  struct snd_pcm_hw_rule *rule)
 541 {
 542         struct snd_pmac *chip = rule->private;
 543         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 544         int i, freq_table[8], num_freqs;
 545 
 546         if (! rec)
 547                 return -EINVAL;
 548         num_freqs = 0;
 549         for (i = chip->num_freqs - 1; i >= 0; i--) {
 550                 if (rec->cur_freqs & (1 << i))
 551                         freq_table[num_freqs++] = chip->freq_table[i];
 552         }
 553 
 554         return snd_interval_list(hw_param_interval(params, rule->var),
 555                                  num_freqs, freq_table, 0);
 556 }
 557 
 558 static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
 559                                    struct snd_pcm_hw_rule *rule)
 560 {
 561         struct snd_pmac *chip = rule->private;
 562         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 563 
 564         if (! rec)
 565                 return -EINVAL;
 566         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 567                                    rec->cur_formats);
 568 }
 569 #endif // NYI
 570 
 571 static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
 572                              struct snd_pcm_substream *subs)
 573 {
 574         struct snd_pcm_runtime *runtime = subs->runtime;
 575         int i;
 576 
 577         /* look up frequency table and fill bit mask */
 578         runtime->hw.rates = 0;
 579         for (i = 0; i < chip->num_freqs; i++)
 580                 if (chip->freqs_ok & (1 << i))
 581                         runtime->hw.rates |=
 582                                 snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
 583 
 584         /* check for minimum and maximum rates */
 585         for (i = 0; i < chip->num_freqs; i++) {
 586                 if (chip->freqs_ok & (1 << i)) {
 587                         runtime->hw.rate_max = chip->freq_table[i];
 588                         break;
 589                 }
 590         }
 591         for (i = chip->num_freqs - 1; i >= 0; i--) {
 592                 if (chip->freqs_ok & (1 << i)) {
 593                         runtime->hw.rate_min = chip->freq_table[i];
 594                         break;
 595                 }
 596         }
 597         runtime->hw.formats = chip->formats_ok;
 598         if (chip->can_capture) {
 599                 if (! chip->can_duplex)
 600                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 601                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 602         }
 603         runtime->private_data = rec;
 604         rec->substream = subs;
 605 
 606 #if 0 /* FIXME: still under development.. */
 607         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 608                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 609         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 610                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
 611 #endif
 612 
 613         runtime->hw.periods_max = rec->cmd.size - 1;
 614 
 615         /* constraints to fix choppy sound */
 616         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 617         return 0;
 618 }
 619 
 620 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
 621                               struct snd_pcm_substream *subs)
 622 {
 623         struct pmac_stream *astr;
 624 
 625         snd_pmac_dma_stop(rec);
 626 
 627         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 628         if (! astr)
 629                 return -EINVAL;
 630 
 631         /* reset constraints */
 632         astr->cur_freqs = chip->freqs_ok;
 633         astr->cur_formats = chip->formats_ok;
 634 
 635         return 0;
 636 }
 637 
 638 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
 639 {
 640         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 641 
 642         subs->runtime->hw = snd_pmac_playback;
 643         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 644 }
 645 
 646 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
 647 {
 648         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 649 
 650         subs->runtime->hw = snd_pmac_capture;
 651         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 652 }
 653 
 654 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
 655 {
 656         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 657 
 658         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 659 }
 660 
 661 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
 662 {
 663         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 664 
 665         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 666 }
 667 
 668 /*
 669  */
 670 
 671 static const struct snd_pcm_ops snd_pmac_playback_ops = {
 672         .open =         snd_pmac_playback_open,
 673         .close =        snd_pmac_playback_close,
 674         .ioctl =        snd_pcm_lib_ioctl,
 675         .hw_params =    snd_pmac_pcm_hw_params,
 676         .hw_free =      snd_pmac_pcm_hw_free,
 677         .prepare =      snd_pmac_playback_prepare,
 678         .trigger =      snd_pmac_playback_trigger,
 679         .pointer =      snd_pmac_playback_pointer,
 680 };
 681 
 682 static const struct snd_pcm_ops snd_pmac_capture_ops = {
 683         .open =         snd_pmac_capture_open,
 684         .close =        snd_pmac_capture_close,
 685         .ioctl =        snd_pcm_lib_ioctl,
 686         .hw_params =    snd_pmac_pcm_hw_params,
 687         .hw_free =      snd_pmac_pcm_hw_free,
 688         .prepare =      snd_pmac_capture_prepare,
 689         .trigger =      snd_pmac_capture_trigger,
 690         .pointer =      snd_pmac_capture_pointer,
 691 };
 692 
 693 int snd_pmac_pcm_new(struct snd_pmac *chip)
 694 {
 695         struct snd_pcm *pcm;
 696         int err;
 697         int num_captures = 1;
 698 
 699         if (! chip->can_capture)
 700                 num_captures = 0;
 701         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 702         if (err < 0)
 703                 return err;
 704 
 705         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 706         if (chip->can_capture)
 707                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 708 
 709         pcm->private_data = chip;
 710         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 711         strcpy(pcm->name, chip->card->shortname);
 712         chip->pcm = pcm;
 713 
 714         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 715         if (chip->can_byte_swap)
 716                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 717 
 718         chip->playback.cur_formats = chip->formats_ok;
 719         chip->capture.cur_formats = chip->formats_ok;
 720         chip->playback.cur_freqs = chip->freqs_ok;
 721         chip->capture.cur_freqs = chip->freqs_ok;
 722 
 723         /* preallocate 64k buffer */
 724         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 725                                               &chip->pdev->dev,
 726                                               64 * 1024, 64 * 1024);
 727 
 728         return 0;
 729 }
 730 
 731 
 732 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
 733 {
 734         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 735         snd_pmac_wait_ack(&chip->playback);
 736         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 737         snd_pmac_wait_ack(&chip->capture);
 738 }
 739 
 740 
 741 /*
 742  * handling beep
 743  */
 744 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
 745 {
 746         struct pmac_stream *rec = &chip->playback;
 747 
 748         snd_pmac_dma_stop(rec);
 749         chip->extra_dma.cmds->req_count = cpu_to_le16(bytes);
 750         chip->extra_dma.cmds->xfer_status = cpu_to_le16(0);
 751         chip->extra_dma.cmds->cmd_dep = cpu_to_le32(chip->extra_dma.addr);
 752         chip->extra_dma.cmds->phy_addr = cpu_to_le32(addr);
 753         chip->extra_dma.cmds->command = cpu_to_le16(OUTPUT_MORE + BR_ALWAYS);
 754         out_le32(&chip->awacs->control,
 755                  (in_le32(&chip->awacs->control) & ~0x1f00)
 756                  | (speed << 8));
 757         out_le32(&chip->awacs->byteswap, 0);
 758         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 759         snd_pmac_dma_run(rec, RUN);
 760 }
 761 
 762 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
 763 {
 764         snd_pmac_dma_stop(&chip->playback);
 765         chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
 766         snd_pmac_pcm_set_format(chip); /* reset format */
 767 }
 768 
 769 
 770 /*
 771  * interrupt handlers
 772  */
 773 static irqreturn_t
 774 snd_pmac_tx_intr(int irq, void *devid)
 775 {
 776         struct snd_pmac *chip = devid;
 777         snd_pmac_pcm_update(chip, &chip->playback);
 778         return IRQ_HANDLED;
 779 }
 780 
 781 
 782 static irqreturn_t
 783 snd_pmac_rx_intr(int irq, void *devid)
 784 {
 785         struct snd_pmac *chip = devid;
 786         snd_pmac_pcm_update(chip, &chip->capture);
 787         return IRQ_HANDLED;
 788 }
 789 
 790 
 791 static irqreturn_t
 792 snd_pmac_ctrl_intr(int irq, void *devid)
 793 {
 794         struct snd_pmac *chip = devid;
 795         int ctrl = in_le32(&chip->awacs->control);
 796 
 797         /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
 798         if (ctrl & MASK_PORTCHG) {
 799                 /* do something when headphone is plugged/unplugged? */
 800                 if (chip->update_automute)
 801                         chip->update_automute(chip, 1);
 802         }
 803         if (ctrl & MASK_CNTLERR) {
 804                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 805                 if (err && chip->model <= PMAC_SCREAMER)
 806                         snd_printk(KERN_DEBUG "error %x\n", err);
 807         }
 808         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 809         out_le32(&chip->awacs->control, ctrl);
 810         return IRQ_HANDLED;
 811 }
 812 
 813 
 814 /*
 815  * a wrapper to feature call for compatibility
 816  */
 817 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
 818 {
 819         if (ppc_md.feature_call)
 820                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 821 }
 822 
 823 /*
 824  * release resources
 825  */
 826 
 827 static int snd_pmac_free(struct snd_pmac *chip)
 828 {
 829         /* stop sounds */
 830         if (chip->initialized) {
 831                 snd_pmac_dbdma_reset(chip);
 832                 /* disable interrupts from awacs interface */
 833                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 834         }
 835 
 836         if (chip->node)
 837                 snd_pmac_sound_feature(chip, 0);
 838 
 839         /* clean up mixer if any */
 840         if (chip->mixer_free)
 841                 chip->mixer_free(chip);
 842 
 843         snd_pmac_detach_beep(chip);
 844 
 845         /* release resources */
 846         if (chip->irq >= 0)
 847                 free_irq(chip->irq, (void*)chip);
 848         if (chip->tx_irq >= 0)
 849                 free_irq(chip->tx_irq, (void*)chip);
 850         if (chip->rx_irq >= 0)
 851                 free_irq(chip->rx_irq, (void*)chip);
 852         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
 853         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
 854         snd_pmac_dbdma_free(chip, &chip->extra_dma);
 855         snd_pmac_dbdma_free(chip, &emergency_dbdma);
 856         iounmap(chip->macio_base);
 857         iounmap(chip->latch_base);
 858         iounmap(chip->awacs);
 859         iounmap(chip->playback.dma);
 860         iounmap(chip->capture.dma);
 861 
 862         if (chip->node) {
 863                 int i;
 864                 for (i = 0; i < 3; i++) {
 865                         if (chip->requested & (1 << i))
 866                                 release_mem_region(chip->rsrc[i].start,
 867                                                    resource_size(&chip->rsrc[i]));
 868                 }
 869         }
 870 
 871         pci_dev_put(chip->pdev);
 872         of_node_put(chip->node);
 873         kfree(chip);
 874         return 0;
 875 }
 876 
 877 
 878 /*
 879  * free the device
 880  */
 881 static int snd_pmac_dev_free(struct snd_device *device)
 882 {
 883         struct snd_pmac *chip = device->device_data;
 884         return snd_pmac_free(chip);
 885 }
 886 
 887 
 888 /*
 889  * check the machine support byteswap (little-endian)
 890  */
 891 
 892 static void detect_byte_swap(struct snd_pmac *chip)
 893 {
 894         struct device_node *mio;
 895 
 896         /* if seems that Keylargo can't byte-swap  */
 897         for (mio = chip->node->parent; mio; mio = mio->parent) {
 898                 if (of_node_name_eq(mio, "mac-io")) {
 899                         if (of_device_is_compatible(mio, "Keylargo"))
 900                                 chip->can_byte_swap = 0;
 901                         break;
 902                 }
 903         }
 904 
 905         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 906         if (of_machine_is_compatible("PowerBook3,1") ||
 907             of_machine_is_compatible("PowerBook2,1"))
 908                 chip->can_byte_swap = 0 ;
 909 
 910         if (of_machine_is_compatible("PowerBook2,1"))
 911                 chip->can_duplex = 0;
 912 }
 913 
 914 
 915 /*
 916  * detect a sound chip
 917  */
 918 static int snd_pmac_detect(struct snd_pmac *chip)
 919 {
 920         struct device_node *sound;
 921         struct device_node *dn;
 922         const unsigned int *prop;
 923         unsigned int l;
 924         struct macio_chip* macio;
 925 
 926         if (!machine_is(powermac))
 927                 return -ENODEV;
 928 
 929         chip->subframe = 0;
 930         chip->revision = 0;
 931         chip->freqs_ok = 0xff; /* all ok */
 932         chip->model = PMAC_AWACS;
 933         chip->can_byte_swap = 1;
 934         chip->can_duplex = 1;
 935         chip->can_capture = 1;
 936         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 937         chip->freq_table = awacs_freqs;
 938         chip->pdev = NULL;
 939 
 940         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 941 
 942         /* check machine type */
 943         if (of_machine_is_compatible("AAPL,3400/2400")
 944             || of_machine_is_compatible("AAPL,3500"))
 945                 chip->is_pbook_3400 = 1;
 946         else if (of_machine_is_compatible("PowerBook1,1")
 947                  || of_machine_is_compatible("AAPL,PowerBook1998"))
 948                 chip->is_pbook_G3 = 1;
 949         chip->node = of_find_node_by_name(NULL, "awacs");
 950         sound = of_node_get(chip->node);
 951 
 952         /*
 953          * powermac G3 models have a node called "davbus"
 954          * with a child called "sound".
 955          */
 956         if (!chip->node)
 957                 chip->node = of_find_node_by_name(NULL, "davbus");
 958         /*
 959          * if we didn't find a davbus device, try 'i2s-a' since
 960          * this seems to be what iBooks have
 961          */
 962         if (! chip->node) {
 963                 chip->node = of_find_node_by_name(NULL, "i2s-a");
 964                 if (chip->node && chip->node->parent &&
 965                     chip->node->parent->parent) {
 966                         if (of_device_is_compatible(chip->node->parent->parent,
 967                                                  "K2-Keylargo"))
 968                                 chip->is_k2 = 1;
 969                 }
 970         }
 971         if (! chip->node)
 972                 return -ENODEV;
 973 
 974         if (!sound) {
 975                 for_each_node_by_name(sound, "sound")
 976                         if (sound->parent == chip->node)
 977                                 break;
 978         }
 979         if (! sound) {
 980                 of_node_put(chip->node);
 981                 chip->node = NULL;
 982                 return -ENODEV;
 983         }
 984         prop = of_get_property(sound, "sub-frame", NULL);
 985         if (prop && *prop < 16)
 986                 chip->subframe = *prop;
 987         prop = of_get_property(sound, "layout-id", NULL);
 988         if (prop) {
 989                 /* partly deprecate snd-powermac, for those machines
 990                  * that have a layout-id property for now */
 991                 printk(KERN_INFO "snd-powermac no longer handles any "
 992                                  "machines with a layout-id property "
 993                                  "in the device-tree, use snd-aoa.\n");
 994                 of_node_put(sound);
 995                 of_node_put(chip->node);
 996                 chip->node = NULL;
 997                 return -ENODEV;
 998         }
 999         /* This should be verified on older screamers */
1000         if (of_device_is_compatible(sound, "screamer")) {
1001                 chip->model = PMAC_SCREAMER;
1002                 // chip->can_byte_swap = 0; /* FIXME: check this */
1003         }
1004         if (of_device_is_compatible(sound, "burgundy")) {
1005                 chip->model = PMAC_BURGUNDY;
1006                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1007         }
1008         if (of_device_is_compatible(sound, "daca")) {
1009                 chip->model = PMAC_DACA;
1010                 chip->can_capture = 0;  /* no capture */
1011                 chip->can_duplex = 0;
1012                 // chip->can_byte_swap = 0; /* FIXME: check this */
1013                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1014         }
1015         if (of_device_is_compatible(sound, "tumbler")) {
1016                 chip->model = PMAC_TUMBLER;
1017                 chip->can_capture = of_machine_is_compatible("PowerMac4,2")
1018                                 || of_machine_is_compatible("PowerBook3,2")
1019                                 || of_machine_is_compatible("PowerBook3,3")
1020                                 || of_machine_is_compatible("PowerBook4,1")
1021                                 || of_machine_is_compatible("PowerBook4,2")
1022                                 || of_machine_is_compatible("PowerBook4,3");
1023                 chip->can_duplex = 0;
1024                 // chip->can_byte_swap = 0; /* FIXME: check this */
1025                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1026                 chip->freq_table = tumbler_freqs;
1027                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1028         }
1029         if (of_device_is_compatible(sound, "snapper")) {
1030                 chip->model = PMAC_SNAPPER;
1031                 // chip->can_byte_swap = 0; /* FIXME: check this */
1032                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1033                 chip->freq_table = tumbler_freqs;
1034                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1035         }
1036         prop = of_get_property(sound, "device-id", NULL);
1037         if (prop)
1038                 chip->device_id = *prop;
1039         dn = of_find_node_by_name(NULL, "perch");
1040         chip->has_iic = (dn != NULL);
1041         of_node_put(dn);
1042 
1043         /* We need the PCI device for DMA allocations, let's use a crude method
1044          * for now ...
1045          */
1046         macio = macio_find(chip->node, macio_unknown);
1047         if (macio == NULL)
1048                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1049         else {
1050                 struct pci_dev *pdev = NULL;
1051 
1052                 for_each_pci_dev(pdev) {
1053                         struct device_node *np = pci_device_to_OF_node(pdev);
1054                         if (np && np == macio->of_node) {
1055                                 chip->pdev = pdev;
1056                                 break;
1057                         }
1058                 }
1059         }
1060         if (chip->pdev == NULL)
1061                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1062                        " device !\n");
1063 
1064         detect_byte_swap(chip);
1065 
1066         /* look for a property saying what sample rates
1067            are available */
1068         prop = of_get_property(sound, "sample-rates", &l);
1069         if (! prop)
1070                 prop = of_get_property(sound, "output-frame-rates", &l);
1071         if (prop) {
1072                 int i;
1073                 chip->freqs_ok = 0;
1074                 for (l /= sizeof(int); l > 0; --l) {
1075                         unsigned int r = *prop++;
1076                         /* Apple 'Fixed' format */
1077                         if (r >= 0x10000)
1078                                 r >>= 16;
1079                         for (i = 0; i < chip->num_freqs; ++i) {
1080                                 if (r == chip->freq_table[i]) {
1081                                         chip->freqs_ok |= (1 << i);
1082                                         break;
1083                                 }
1084                         }
1085                 }
1086         } else {
1087                 /* assume only 44.1khz */
1088                 chip->freqs_ok = 1;
1089         }
1090 
1091         of_node_put(sound);
1092         return 0;
1093 }
1094 
1095 #ifdef PMAC_SUPPORT_AUTOMUTE
1096 /*
1097  * auto-mute
1098  */
1099 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1100                               struct snd_ctl_elem_value *ucontrol)
1101 {
1102         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1103         ucontrol->value.integer.value[0] = chip->auto_mute;
1104         return 0;
1105 }
1106 
1107 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1108                               struct snd_ctl_elem_value *ucontrol)
1109 {
1110         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1111         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1112                 chip->auto_mute = !!ucontrol->value.integer.value[0];
1113                 if (chip->update_automute)
1114                         chip->update_automute(chip, 1);
1115                 return 1;
1116         }
1117         return 0;
1118 }
1119 
1120 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1121                               struct snd_ctl_elem_value *ucontrol)
1122 {
1123         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1124         if (chip->detect_headphone)
1125                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1126         else
1127                 ucontrol->value.integer.value[0] = 0;
1128         return 0;
1129 }
1130 
1131 static struct snd_kcontrol_new auto_mute_controls[] = {
1132         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1133           .name = "Auto Mute Switch",
1134           .info = snd_pmac_boolean_mono_info,
1135           .get = pmac_auto_mute_get,
1136           .put = pmac_auto_mute_put,
1137         },
1138         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1139           .name = "Headphone Detection",
1140           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1141           .info = snd_pmac_boolean_mono_info,
1142           .get = pmac_hp_detect_get,
1143         },
1144 };
1145 
1146 int snd_pmac_add_automute(struct snd_pmac *chip)
1147 {
1148         int err;
1149         chip->auto_mute = 1;
1150         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1151         if (err < 0) {
1152                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1153                 return err;
1154         }
1155         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1156         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1157 }
1158 #endif /* PMAC_SUPPORT_AUTOMUTE */
1159 
1160 /*
1161  * create and detect a pmac chip record
1162  */
1163 int snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1164 {
1165         struct snd_pmac *chip;
1166         struct device_node *np;
1167         int i, err;
1168         unsigned int irq;
1169         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1170         static struct snd_device_ops ops = {
1171                 .dev_free =     snd_pmac_dev_free,
1172         };
1173 
1174         *chip_return = NULL;
1175 
1176         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1177         if (chip == NULL)
1178                 return -ENOMEM;
1179         chip->card = card;
1180 
1181         spin_lock_init(&chip->reg_lock);
1182         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1183 
1184         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1185         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1186 
1187         if ((err = snd_pmac_detect(chip)) < 0)
1188                 goto __error;
1189 
1190         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1191             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1192             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1193             snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1194                 err = -ENOMEM;
1195                 goto __error;
1196         }
1197 
1198         np = chip->node;
1199         chip->requested = 0;
1200         if (chip->is_k2) {
1201                 static char *rnames[] = {
1202                         "Sound Control", "Sound DMA" };
1203                 for (i = 0; i < 2; i ++) {
1204                         if (of_address_to_resource(np->parent, i,
1205                                                    &chip->rsrc[i])) {
1206                                 printk(KERN_ERR "snd: can't translate rsrc "
1207                                        " %d (%s)\n", i, rnames[i]);
1208                                 err = -ENODEV;
1209                                 goto __error;
1210                         }
1211                         if (request_mem_region(chip->rsrc[i].start,
1212                                                resource_size(&chip->rsrc[i]),
1213                                                rnames[i]) == NULL) {
1214                                 printk(KERN_ERR "snd: can't request rsrc "
1215                                        " %d (%s: %pR)\n",
1216                                        i, rnames[i], &chip->rsrc[i]);
1217                                 err = -ENODEV;
1218                                 goto __error;
1219                         }
1220                         chip->requested |= (1 << i);
1221                 }
1222                 ctrl_addr = chip->rsrc[0].start;
1223                 txdma_addr = chip->rsrc[1].start;
1224                 rxdma_addr = txdma_addr + 0x100;
1225         } else {
1226                 static char *rnames[] = {
1227                         "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1228                 for (i = 0; i < 3; i ++) {
1229                         if (of_address_to_resource(np, i,
1230                                                    &chip->rsrc[i])) {
1231                                 printk(KERN_ERR "snd: can't translate rsrc "
1232                                        " %d (%s)\n", i, rnames[i]);
1233                                 err = -ENODEV;
1234                                 goto __error;
1235                         }
1236                         if (request_mem_region(chip->rsrc[i].start,
1237                                                resource_size(&chip->rsrc[i]),
1238                                                rnames[i]) == NULL) {
1239                                 printk(KERN_ERR "snd: can't request rsrc "
1240                                        " %d (%s: %pR)\n",
1241                                        i, rnames[i], &chip->rsrc[i]);
1242                                 err = -ENODEV;
1243                                 goto __error;
1244                         }
1245                         chip->requested |= (1 << i);
1246                 }
1247                 ctrl_addr = chip->rsrc[0].start;
1248                 txdma_addr = chip->rsrc[1].start;
1249                 rxdma_addr = chip->rsrc[2].start;
1250         }
1251 
1252         chip->awacs = ioremap(ctrl_addr, 0x1000);
1253         chip->playback.dma = ioremap(txdma_addr, 0x100);
1254         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1255         if (chip->model <= PMAC_BURGUNDY) {
1256                 irq = irq_of_parse_and_map(np, 0);
1257                 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1258                                 "PMac", (void*)chip)) {
1259                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1260                                    irq);
1261                         err = -EBUSY;
1262                         goto __error;
1263                 }
1264                 chip->irq = irq;
1265         }
1266         irq = irq_of_parse_and_map(np, 1);
1267         if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1268                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1269                 err = -EBUSY;
1270                 goto __error;
1271         }
1272         chip->tx_irq = irq;
1273         irq = irq_of_parse_and_map(np, 2);
1274         if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1275                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1276                 err = -EBUSY;
1277                 goto __error;
1278         }
1279         chip->rx_irq = irq;
1280 
1281         snd_pmac_sound_feature(chip, 1);
1282 
1283         /* reset & enable interrupts */
1284         if (chip->model <= PMAC_BURGUNDY)
1285                 out_le32(&chip->awacs->control, chip->control_mask);
1286 
1287         /* Powerbooks have odd ways of enabling inputs such as
1288            an expansion-bay CD or sound from an internal modem
1289            or a PC-card modem. */
1290         if (chip->is_pbook_3400) {
1291                 /* Enable CD and PC-card sound inputs. */
1292                 /* This is done by reading from address
1293                  * f301a000, + 0x10 to enable the expansion-bay
1294                  * CD sound input, + 0x80 to enable the PC-card
1295                  * sound input.  The 0x100 enables the SCSI bus
1296                  * terminator power.
1297                  */
1298                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1299                 in_8(chip->latch_base + 0x190);
1300         } else if (chip->is_pbook_G3) {
1301                 struct device_node* mio;
1302                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1303                         if (of_node_name_eq(mio, "mac-io")) {
1304                                 struct resource r;
1305                                 if (of_address_to_resource(mio, 0, &r) == 0)
1306                                         chip->macio_base =
1307                                                 ioremap(r.start, 0x40);
1308                                 break;
1309                         }
1310                 }
1311                 /* Enable CD sound input. */
1312                 /* The relevant bits for writing to this byte are 0x8f.
1313                  * I haven't found out what the 0x80 bit does.
1314                  * For the 0xf bits, writing 3 or 7 enables the CD
1315                  * input, any other value disables it.  Values
1316                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1317                  * 4, 6, 8 - f enable the input from the modem.
1318                  */
1319                 if (chip->macio_base)
1320                         out_8(chip->macio_base + 0x37, 3);
1321         }
1322 
1323         /* Reset dbdma channels */
1324         snd_pmac_dbdma_reset(chip);
1325 
1326         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1327                 goto __error;
1328 
1329         *chip_return = chip;
1330         return 0;
1331 
1332  __error:
1333         snd_pmac_free(chip);
1334         return err;
1335 }
1336 
1337 
1338 /*
1339  * sleep notify for powerbook
1340  */
1341 
1342 #ifdef CONFIG_PM
1343 
1344 /*
1345  * Save state when going to sleep, restore it afterwards.
1346  */
1347 
1348 void snd_pmac_suspend(struct snd_pmac *chip)
1349 {
1350         unsigned long flags;
1351 
1352         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1353         if (chip->suspend)
1354                 chip->suspend(chip);
1355         spin_lock_irqsave(&chip->reg_lock, flags);
1356         snd_pmac_beep_stop(chip);
1357         spin_unlock_irqrestore(&chip->reg_lock, flags);
1358         if (chip->irq >= 0)
1359                 disable_irq(chip->irq);
1360         if (chip->tx_irq >= 0)
1361                 disable_irq(chip->tx_irq);
1362         if (chip->rx_irq >= 0)
1363                 disable_irq(chip->rx_irq);
1364         snd_pmac_sound_feature(chip, 0);
1365 }
1366 
1367 void snd_pmac_resume(struct snd_pmac *chip)
1368 {
1369         snd_pmac_sound_feature(chip, 1);
1370         if (chip->resume)
1371                 chip->resume(chip);
1372         /* enable CD sound input */
1373         if (chip->macio_base && chip->is_pbook_G3)
1374                 out_8(chip->macio_base + 0x37, 3);
1375         else if (chip->is_pbook_3400)
1376                 in_8(chip->latch_base + 0x190);
1377 
1378         snd_pmac_pcm_set_format(chip);
1379 
1380         if (chip->irq >= 0)
1381                 enable_irq(chip->irq);
1382         if (chip->tx_irq >= 0)
1383                 enable_irq(chip->tx_irq);
1384         if (chip->rx_irq >= 0)
1385                 enable_irq(chip->rx_irq);
1386 
1387         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1388 }
1389 
1390 #endif /* CONFIG_PM */
1391
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root/sound/ppc/pmac.c

DEFINITIONS
