2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Universal interface for Audio Codec '97
5 * For more details look to AC '97 component specification revision 2.2
6 * by Intel Corporation (http://developer.intel.com) and to datasheets
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <sound/driver.h>
27 #include <linux/delay.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/control.h>
33 #include <sound/ac97_codec.h>
34 #include <sound/asoundef.h>
35 #include "ac97_patch.h"
37 #include "ac97_local.h"
43 static unsigned char rate_reg_tables[2][4][9] = {
47 /* 3&4 front, 7&8 rear, 6&9 center/lfe */
48 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
49 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
51 AC97_PCM_LFE_DAC_RATE, /* slot 6 */
52 AC97_PCM_SURR_DAC_RATE, /* slot 7 */
53 AC97_PCM_SURR_DAC_RATE, /* slot 8 */
54 AC97_PCM_LFE_DAC_RATE, /* slot 9 */
59 /* 7&8 front, 6&9 rear, 10&11 center/lfe */
63 AC97_PCM_SURR_DAC_RATE, /* slot 6 */
64 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
65 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
66 AC97_PCM_SURR_DAC_RATE, /* slot 9 */
67 AC97_PCM_LFE_DAC_RATE, /* slot 10 */
68 AC97_PCM_LFE_DAC_RATE, /* slot 11 */
71 /* 6&9 front, 10&11 rear, 3&4 center/lfe */
72 AC97_PCM_LFE_DAC_RATE, /* slot 3 */
73 AC97_PCM_LFE_DAC_RATE, /* slot 4 */
75 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */
78 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */
79 AC97_PCM_SURR_DAC_RATE, /* slot 10 */
80 AC97_PCM_SURR_DAC_RATE, /* slot 11 */
83 /* 10&11 front, 3&4 rear, 7&8 center/lfe */
84 AC97_PCM_SURR_DAC_RATE, /* slot 3 */
85 AC97_PCM_SURR_DAC_RATE, /* slot 4 */
88 AC97_PCM_LFE_DAC_RATE, /* slot 7 */
89 AC97_PCM_LFE_DAC_RATE, /* slot 8 */
91 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */
92 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */
98 /* 3&4 front, 7&8 front (t+1) */
99 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */
100 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */
103 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */
104 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */
110 /* not specified in the specification */
145 /* FIXME: more various mappings for ADC? */
146 static unsigned char rate_cregs[9] = {
147 AC97_PCM_LR_ADC_RATE, /* 3 */
148 AC97_PCM_LR_ADC_RATE, /* 4 */
150 AC97_PCM_MIC_ADC_RATE, /* 6 */
158 static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx,
159 unsigned short slot, int dbl)
166 return AC97_SPDIF; /* pseudo register */
167 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK)
168 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3];
170 return rate_cregs[slot - 3];
173 static int set_spdif_rate(ac97_t *ac97, unsigned short rate)
175 unsigned short old, bits, reg, mask;
178 if (! (ac97->ext_id & AC97_EI_SPDIF))
181 /* TODO: double rate support */
182 if (ac97->flags & AC97_CS_SPDIF) {
184 case 48000: bits = 0; break;
185 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break;
186 default: /* invalid - disable output */
187 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
190 reg = AC97_CSR_SPDIF;
191 mask = 1 << AC97_SC_SPSR_SHIFT;
193 if (ac97->id == AC97_ID_CM9739 && rate != 48000) {
194 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
198 case 44100: bits = AC97_SC_SPSR_44K; break;
199 case 48000: bits = AC97_SC_SPSR_48K; break;
200 case 32000: bits = AC97_SC_SPSR_32K; break;
201 default: /* invalid - disable output */
202 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
206 mask = AC97_SC_SPSR_MASK;
209 spin_lock(&ac97->reg_lock);
210 old = snd_ac97_read(ac97, reg) & mask;
211 spin_unlock(&ac97->reg_lock);
213 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
214 snd_ac97_update_bits(ac97, reg, mask, bits);
215 /* update the internal spdif bits */
216 spin_lock(&ac97->reg_lock);
217 sbits = ac97->spdif_status;
218 if (sbits & IEC958_AES0_PROFESSIONAL) {
219 sbits &= ~IEC958_AES0_PRO_FS;
221 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;
222 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;
223 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;
226 sbits &= ~(IEC958_AES3_CON_FS << 24);
228 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;
229 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;
230 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;
233 ac97->spdif_status = sbits;
234 spin_unlock(&ac97->reg_lock);
236 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);
241 * snd_ac97_set_rate - change the rate of the given input/output.
242 * @ac97: the ac97 instance
243 * @reg: the register to change
244 * @rate: the sample rate to set
246 * Changes the rate of the given input/output on the codec.
247 * If the codec doesn't support VAR, the rate must be 48000 (except
250 * The valid registers are AC97_PMC_MIC_ADC_RATE,
251 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
252 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
253 * if the codec supports them.
254 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
257 * Returns zero if successful, or a negative error code on failure.
259 int snd_ac97_set_rate(ac97_t *ac97, int reg, unsigned int rate)
266 if (!(ac97->flags & AC97_DOUBLE_RATE))
268 if (reg != AC97_PCM_FRONT_DAC_RATE)
273 case AC97_PCM_MIC_ADC_RATE:
274 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */
278 case AC97_PCM_FRONT_DAC_RATE:
279 case AC97_PCM_LR_ADC_RATE:
280 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */
281 if (rate != 48000 && rate != 96000)
284 case AC97_PCM_SURR_DAC_RATE:
285 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))
288 case AC97_PCM_LFE_DAC_RATE:
289 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
294 return set_spdif_rate(ac97, rate);
300 tmp = (rate * ac97->bus->clock) / 48000;
303 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)
304 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
305 AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);
306 snd_ac97_update(ac97, reg, tmp & 0xffff);
307 snd_ac97_read(ac97, reg);
311 static unsigned short get_pslots(ac97_t *ac97, unsigned char *rate_table, unsigned short *spdif_slots)
313 if (!ac97_is_audio(ac97))
315 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {
316 unsigned short slots = 0;
317 if (ac97_is_rev22(ac97)) {
318 /* Note: it's simply emulation of AMAP behaviour */
320 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK;
321 switch (ac97->addr) {
323 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;
324 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;
326 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es);
328 switch (ac97->addr) {
330 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
331 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
332 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
333 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
334 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
335 if (ac97->ext_id & AC97_EI_SPDIF) {
336 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
337 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
338 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
339 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
341 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
347 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
348 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
349 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
350 if (ac97->ext_id & AC97_EI_SPDIF) {
351 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
352 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
354 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
359 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
360 if (ac97->ext_id & AC97_EI_SPDIF)
361 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
367 unsigned short slots;
368 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
369 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
370 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);
371 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
372 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);
373 if (ac97->ext_id & AC97_EI_SPDIF) {
374 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))
375 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);
376 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))
377 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);
379 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);
386 static unsigned short get_cslots(ac97_t *ac97)
388 unsigned short slots;
390 if (!ac97_is_audio(ac97))
392 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);
393 slots |= (1<<AC97_SLOT_MIC);
397 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)
400 unsigned int rates = ~0;
403 for (i = 3; i < 12; i++) {
404 if (!(slots & (1 << i)))
406 reg = get_slot_reg(pcm, cidx, i, dbl);
408 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;
409 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;
410 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;
411 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;
412 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;
413 default: idx = AC97_RATES_SPDIF; break;
415 rates &= pcm->r[dbl].codec[cidx]->rates[idx];
418 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 |
419 SNDRV_PCM_RATE_96000);
424 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams
425 * @bus: the ac97 bus instance
426 * @pcms_count: count of PCMs to be assigned
427 * @pcms: PCMs to be assigned
429 * It assigns available AC97 slots for given PCMs. If none or only
430 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
431 * are reduced and might be zero.
433 int snd_ac97_pcm_assign(ac97_bus_t *bus,
434 unsigned short pcms_count,
435 const struct ac97_pcm *pcms)
438 const struct ac97_pcm *pcm;
439 struct ac97_pcm *rpcms, *rpcm;
440 unsigned short avail_slots[2][4];
441 unsigned char rate_table[2][4];
442 unsigned short tmp, slots;
443 unsigned short spdif_slots[4];
447 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL);
450 memset(avail_slots, 0, sizeof(avail_slots));
451 memset(rate_table, 0, sizeof(rate_table));
452 memset(spdif_slots, 0, sizeof(spdif_slots));
453 for (i = 0; i < 4; i++) {
454 codec = bus->codec[i];
457 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);
458 avail_slots[1][i] = get_cslots(codec);
459 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {
460 for (j = 0; j < i; j++) {
462 avail_slots[1][i] &= ~avail_slots[1][j];
466 /* first step - exclusive devices */
467 for (i = 0; i < pcms_count; i++) {
470 /* low-level driver thinks that it's more clever */
471 if (pcm->copy_flag) {
475 rpcm->stream = pcm->stream;
476 rpcm->exclusive = pcm->exclusive;
477 rpcm->spdif = pcm->spdif;
478 rpcm->private_value = pcm->private_value;
481 slots = pcm->r[0].slots;
482 for (j = 0; j < 4 && slots; j++) {
486 if (pcm->spdif && pcm->stream == 0)
487 tmp = spdif_slots[j];
489 tmp = avail_slots[pcm->stream][j];
490 if (pcm->exclusive) {
491 /* exclusive access */
493 for (k = 0; k < i; k++) {
494 if (rpcm->stream == rpcms[k].stream)
495 tmp &= ~rpcms[k].r[0].rslots[j];
498 /* non-exclusive access */
499 tmp &= pcm->r[0].slots;
502 rpcm->r[0].rslots[j] = tmp;
503 rpcm->r[0].codec[j] = bus->codec[j];
504 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];
506 rates = SNDRV_PCM_RATE_48000;
508 rates = get_rates(rpcm, j, tmp, 0);
510 avail_slots[pcm->stream][j] &= ~tmp;
513 rpcm->r[0].slots |= tmp;
514 rpcm->rates &= rates;
516 /* for double rate, we check the first codec only */
517 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK &&
518 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) &&
519 rate_table[pcm->stream][0] == 0) {
520 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) |
521 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0);
522 if ((tmp & pcm->r[1].slots) == tmp) {
523 rpcm->r[1].slots = tmp;
524 rpcm->r[1].rslots[0] = tmp;
525 rpcm->r[1].rate_table[0] = 0;
526 rpcm->r[1].codec[0] = bus->codec[0];
528 avail_slots[pcm->stream][0] &= ~tmp;
530 rates = SNDRV_PCM_RATE_96000;
532 rates = get_rates(rpcm, 0, tmp, 1);
533 rpcm->rates |= rates;
536 if (rpcm->rates == ~0)
537 rpcm->rates = 0; /* not used */
539 bus->pcms_count = pcms_count;
545 * snd_ac97_pcm_open - opens the given AC97 pcm
546 * @pcm: the ac97 pcm instance
547 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz
548 * @cfg: output stream characteristics
549 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
551 * It locks the specified slots and sets the given rate to AC97 registers.
553 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
554 enum ac97_pcm_cfg cfg, unsigned short slots)
557 int i, cidx, r, ok_flag;
558 unsigned int reg_ok = 0;
564 if (cfg == AC97_PCM_CFG_SPDIF) {
566 for (cidx = 0; cidx < 4; cidx++)
567 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {
568 err = set_spdif_rate(bus->codec[cidx], rate);
573 spin_lock_irq(&pcm->bus->bus_lock);
574 for (i = 3; i < 12; i++) {
575 if (!(slots & (1 << i)))
578 for (cidx = 0; cidx < 4; cidx++) {
579 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
580 spin_unlock_irq(&pcm->bus->bus_lock);
584 if (pcm->r[r].rslots[cidx] & (1 << i)) {
585 bus->used_slots[pcm->stream][cidx] |= (1 << i);
590 spin_unlock_irq(&pcm->bus->bus_lock);
591 snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i);
596 spin_unlock_irq(&pcm->bus->bus_lock);
597 for (i = 3; i < 12; i++) {
598 if (!(slots & (1 << i)))
600 for (cidx = 0; cidx < 4; cidx++) {
601 if (pcm->r[r].rslots[cidx] & (1 << i)) {
602 reg = get_slot_reg(pcm, cidx, i, r);
604 snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i);
607 if (reg_ok & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))
609 //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate);
610 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);
612 snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err);
614 reg_ok |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));
623 snd_ac97_pcm_close(pcm);
628 * snd_ac97_pcm_close - closes the given AC97 pcm
629 * @pcm: the ac97 pcm instance
631 * It frees the locked AC97 slots.
633 int snd_ac97_pcm_close(struct ac97_pcm *pcm)
636 unsigned short slots = pcm->aslots;
640 spin_lock_irq(&pcm->bus->bus_lock);
641 for (i = 3; i < 12; i++) {
642 if (!(slots & (1 << i)))
644 for (cidx = 0; cidx < 4; cidx++)
645 bus->used_slots[pcm->stream][cidx] &= ~(1 << i);
648 spin_unlock_irq(&pcm->bus->bus_lock);
652 static int double_rate_hw_constraint_rate(snd_pcm_hw_params_t *params,
653 snd_pcm_hw_rule_t *rule)
655 snd_interval_t *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
656 if (channels->min > 2) {
657 static const snd_interval_t single_rates = {
661 snd_interval_t *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
662 return snd_interval_refine(rate, &single_rates);
667 static int double_rate_hw_constraint_channels(snd_pcm_hw_params_t *params,
668 snd_pcm_hw_rule_t *rule)
670 snd_interval_t *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
671 if (rate->min > 48000) {
672 static const snd_interval_t double_rate_channels = {
676 snd_interval_t *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
677 return snd_interval_refine(channels, &double_rate_channels);
683 * snd_ac97_pcm_double_rate_rules - set double rate constraints
684 * @runtime: the runtime of the ac97 front playback pcm
686 * Installs the hardware constraint rules to prevent using double rates and
687 * more than two channels at the same time.
689 int snd_ac97_pcm_double_rate_rules(snd_pcm_runtime_t *runtime)
693 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
694 double_rate_hw_constraint_rate, NULL,
695 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
698 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
699 double_rate_hw_constraint_channels, NULL,
700 SNDRV_PCM_HW_PARAM_RATE, -1);