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