738 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>4 * Universal interface for Audio Codec '975 *6 * For more details look to AC '97 component specification revision 2.27 * by Intel Corporation (http://developer.intel.com) and to datasheets8 * for specific codecs.9 */10 11#include <linux/delay.h>12#include <linux/init.h>13#include <linux/slab.h>14#include <linux/mutex.h>15#include <linux/export.h>16 17#include <sound/core.h>18#include <sound/pcm.h>19#include <sound/control.h>20#include <sound/ac97_codec.h>21#include <sound/asoundef.h>22#include "ac97_id.h"23#include "ac97_local.h"24 25/*26 * PCM support27 */28 29static const unsigned char rate_reg_tables[2][4][9] = {30{31 /* standard rates */32 {33 /* 3&4 front, 7&8 rear, 6&9 center/lfe */34 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */35 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */36 0xff, /* slot 5 */37 AC97_PCM_LFE_DAC_RATE, /* slot 6 */38 AC97_PCM_SURR_DAC_RATE, /* slot 7 */39 AC97_PCM_SURR_DAC_RATE, /* slot 8 */40 AC97_PCM_LFE_DAC_RATE, /* slot 9 */41 0xff, /* slot 10 */42 0xff, /* slot 11 */43 },44 {45 /* 7&8 front, 6&9 rear, 10&11 center/lfe */46 0xff, /* slot 3 */47 0xff, /* slot 4 */48 0xff, /* slot 5 */49 AC97_PCM_SURR_DAC_RATE, /* slot 6 */50 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */51 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */52 AC97_PCM_SURR_DAC_RATE, /* slot 9 */53 AC97_PCM_LFE_DAC_RATE, /* slot 10 */54 AC97_PCM_LFE_DAC_RATE, /* slot 11 */55 },56 {57 /* 6&9 front, 10&11 rear, 3&4 center/lfe */58 AC97_PCM_LFE_DAC_RATE, /* slot 3 */59 AC97_PCM_LFE_DAC_RATE, /* slot 4 */60 0xff, /* slot 5 */61 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */62 0xff, /* slot 7 */63 0xff, /* slot 8 */64 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */65 AC97_PCM_SURR_DAC_RATE, /* slot 10 */66 AC97_PCM_SURR_DAC_RATE, /* slot 11 */67 },68 {69 /* 10&11 front, 3&4 rear, 7&8 center/lfe */70 AC97_PCM_SURR_DAC_RATE, /* slot 3 */71 AC97_PCM_SURR_DAC_RATE, /* slot 4 */72 0xff, /* slot 5 */73 0xff, /* slot 6 */74 AC97_PCM_LFE_DAC_RATE, /* slot 7 */75 AC97_PCM_LFE_DAC_RATE, /* slot 8 */76 0xff, /* slot 9 */77 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */78 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */79 },80},81{82 /* double rates */83 {84 /* 3&4 front, 7&8 front (t+1) */85 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */86 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */87 0xff, /* slot 5 */88 0xff, /* slot 6 */89 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */90 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */91 0xff, /* slot 9 */92 0xff, /* slot 10 */93 0xff, /* slot 11 */94 },95 {96 /* not specified in the specification */97 0xff, /* slot 3 */98 0xff, /* slot 4 */99 0xff, /* slot 5 */100 0xff, /* slot 6 */101 0xff, /* slot 7 */102 0xff, /* slot 8 */103 0xff, /* slot 9 */104 0xff, /* slot 10 */105 0xff, /* slot 11 */106 },107 {108 0xff, /* slot 3 */109 0xff, /* slot 4 */110 0xff, /* slot 5 */111 0xff, /* slot 6 */112 0xff, /* slot 7 */113 0xff, /* slot 8 */114 0xff, /* slot 9 */115 0xff, /* slot 10 */116 0xff, /* slot 11 */117 },118 {119 0xff, /* slot 3 */120 0xff, /* slot 4 */121 0xff, /* slot 5 */122 0xff, /* slot 6 */123 0xff, /* slot 7 */124 0xff, /* slot 8 */125 0xff, /* slot 9 */126 0xff, /* slot 10 */127 0xff, /* slot 11 */128 }129}};130 131/* FIXME: more various mappings for ADC? */132static const unsigned char rate_cregs[9] = {133 AC97_PCM_LR_ADC_RATE, /* 3 */134 AC97_PCM_LR_ADC_RATE, /* 4 */135 0xff, /* 5 */136 AC97_PCM_MIC_ADC_RATE, /* 6 */137 0xff, /* 7 */138 0xff, /* 8 */139 0xff, /* 9 */140 0xff, /* 10 */141 0xff, /* 11 */142};143 144static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx,145 unsigned short slot, int dbl)146{147 if (slot < 3)148 return 0xff;149 if (slot > 11)150 return 0xff;151 if (pcm->spdif)152 return AC97_SPDIF; /* pseudo register */153 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK)154 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3];155 else156 return rate_cregs[slot - 3];157}158 159static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate)160{161 unsigned short old, bits, reg, mask;162 unsigned int sbits;163 164 if (! (ac97->ext_id & AC97_EI_SPDIF))165 return -ENODEV;166 167 /* TODO: double rate support */168 if (ac97->flags & AC97_CS_SPDIF) {169 switch (rate) {170 case 48000: bits = 0; break;171 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break;172 default: /* invalid - disable output */173 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);174 return -EINVAL;175 }176 reg = AC97_CSR_SPDIF;177 mask = 1 << AC97_SC_SPSR_SHIFT;178 } else {179 if (ac97->id == AC97_ID_CM9739 && rate != 48000) {180 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);181 return -EINVAL;182 }183 switch (rate) {184 case 44100: bits = AC97_SC_SPSR_44K; break;185 case 48000: bits = AC97_SC_SPSR_48K; break;186 case 32000: bits = AC97_SC_SPSR_32K; break;187 default: /* invalid - disable output */188 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);189 return -EINVAL;190 }191 reg = AC97_SPDIF;192 mask = AC97_SC_SPSR_MASK;193 }194 195 mutex_lock(&ac97->reg_mutex);196 old = snd_ac97_read(ac97, reg) & mask;197 if (old != bits) {198 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);199 snd_ac97_update_bits_nolock(ac97, reg, mask, bits);200 /* update the internal spdif bits */201 sbits = ac97->spdif_status;202 if (sbits & IEC958_AES0_PROFESSIONAL) {203 sbits &= ~IEC958_AES0_PRO_FS;204 switch (rate) {205 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break;206 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break;207 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break;208 }209 } else {210 sbits &= ~(IEC958_AES3_CON_FS << 24);211 switch (rate) {212 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break;213 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break;214 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break;215 }216 }217 ac97->spdif_status = sbits;218 }219 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF);220 mutex_unlock(&ac97->reg_mutex);221 return 0;222}223 224/**225 * snd_ac97_set_rate - change the rate of the given input/output.226 * @ac97: the ac97 instance227 * @reg: the register to change228 * @rate: the sample rate to set229 *230 * Changes the rate of the given input/output on the codec.231 * If the codec doesn't support VAR, the rate must be 48000 (except232 * for SPDIF).233 *234 * The valid registers are AC97_PCM_MIC_ADC_RATE,235 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.236 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted237 * if the codec supports them.238 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF239 * status bits.240 *241 * Return: Zero if successful, or a negative error code on failure.242 */243int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate)244{245 int dbl;246 unsigned int tmp;247 248 dbl = rate > 48000;249 if (dbl) {250 if (!(ac97->flags & AC97_DOUBLE_RATE))251 return -EINVAL;252 if (reg != AC97_PCM_FRONT_DAC_RATE)253 return -EINVAL;254 }255 256 snd_ac97_update_power(ac97, reg, 1);257 switch (reg) {258 case AC97_PCM_MIC_ADC_RATE:259 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */260 if (rate != 48000)261 return -EINVAL;262 break;263 case AC97_PCM_FRONT_DAC_RATE:264 case AC97_PCM_LR_ADC_RATE:265 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */266 if (rate != 48000 && rate != 96000)267 return -EINVAL;268 break;269 case AC97_PCM_SURR_DAC_RATE:270 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC))271 return -EINVAL;272 break;273 case AC97_PCM_LFE_DAC_RATE:274 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))275 return -EINVAL;276 break;277 case AC97_SPDIF:278 /* special case */279 return set_spdif_rate(ac97, rate);280 default:281 return -EINVAL;282 }283 if (dbl)284 rate /= 2;285 tmp = (rate * ac97->bus->clock) / 48000;286 if (tmp > 65535)287 return -EINVAL;288 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)289 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,290 AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);291 snd_ac97_update(ac97, reg, tmp & 0xffff);292 snd_ac97_read(ac97, reg);293 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) {294 /* Intel controllers require double rate data to be put in295 * slots 7+8296 */297 snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE,298 AC97_GP_DRSS_MASK,299 dbl ? AC97_GP_DRSS_78 : 0);300 snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);301 }302 return 0;303}304 305EXPORT_SYMBOL(snd_ac97_set_rate);306 307static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots)308{309 if (!ac97_is_audio(ac97))310 return 0;311 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) {312 unsigned short slots = 0;313 if (ac97_is_rev22(ac97)) {314 /* Note: it's simply emulation of AMAP behaviour */315 u16 es;316 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK;317 switch (ac97->addr) {318 case 1:319 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break;320 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break;321 }322 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es);323 }324 switch (ac97->addr) {325 case 0:326 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);327 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)328 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);329 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)330 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);331 if (ac97->ext_id & AC97_EI_SPDIF) {332 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))333 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);334 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))335 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);336 else337 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);338 }339 *rate_table = 0;340 break;341 case 1:342 case 2:343 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);344 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)345 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);346 if (ac97->ext_id & AC97_EI_SPDIF) {347 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))348 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);349 else350 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);351 }352 *rate_table = 1;353 break;354 case 3:355 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);356 if (ac97->ext_id & AC97_EI_SPDIF)357 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);358 *rate_table = 2;359 break;360 }361 return slots;362 } else {363 unsigned short slots;364 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);365 if (ac97->scaps & AC97_SCAP_SURROUND_DAC)366 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT);367 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)368 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE);369 if (ac97->ext_id & AC97_EI_SPDIF) {370 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC))371 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT);372 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC))373 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1);374 else375 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2);376 }377 *rate_table = 0;378 return slots;379 }380}381 382static unsigned short get_cslots(struct snd_ac97 *ac97)383{384 unsigned short slots;385 386 if (!ac97_is_audio(ac97))387 return 0;388 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT);389 slots |= (1<<AC97_SLOT_MIC);390 return slots;391}392 393static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl)394{395 int i, idx;396 unsigned int rates = ~0;397 unsigned char reg;398 399 for (i = 3; i < 12; i++) {400 if (!(slots & (1 << i)))401 continue;402 reg = get_slot_reg(pcm, cidx, i, dbl);403 switch (reg) {404 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break;405 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break;406 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break;407 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break;408 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break;409 default: idx = AC97_RATES_SPDIF; break;410 }411 rates &= pcm->r[dbl].codec[cidx]->rates[idx];412 }413 if (!dbl)414 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 |415 SNDRV_PCM_RATE_96000);416 return rates;417}418 419/**420 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams421 * @bus: the ac97 bus instance422 * @pcms_count: count of PCMs to be assigned423 * @pcms: PCMs to be assigned424 *425 * It assigns available AC97 slots for given PCMs. If none or only426 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members427 * are reduced and might be zero.428 *429 * Return: Zero if successful, or a negative error code on failure.430 */431int snd_ac97_pcm_assign(struct snd_ac97_bus *bus,432 unsigned short pcms_count,433 const struct ac97_pcm *pcms)434{435 int i, j, k;436 const struct ac97_pcm *pcm;437 struct ac97_pcm *rpcms, *rpcm;438 unsigned short avail_slots[2][4];439 unsigned char rate_table[2][4];440 unsigned short tmp, slots;441 unsigned short spdif_slots[4];442 unsigned int rates;443 struct snd_ac97 *codec;444 445 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL);446 if (rpcms == NULL)447 return -ENOMEM;448 memset(avail_slots, 0, sizeof(avail_slots));449 memset(rate_table, 0, sizeof(rate_table));450 memset(spdif_slots, 0, sizeof(spdif_slots));451 for (i = 0; i < 4; i++) {452 codec = bus->codec[i];453 if (!codec)454 continue;455 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]);456 avail_slots[1][i] = get_cslots(codec);457 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) {458 for (j = 0; j < i; j++) {459 if (bus->codec[j])460 avail_slots[1][i] &= ~avail_slots[1][j];461 }462 }463 }464 /* first step - exclusive devices */465 for (i = 0; i < pcms_count; i++) {466 pcm = &pcms[i];467 rpcm = &rpcms[i];468 /* low-level driver thinks that it's more clever */469 if (pcm->copy_flag) {470 *rpcm = *pcm;471 continue;472 }473 rpcm->stream = pcm->stream;474 rpcm->exclusive = pcm->exclusive;475 rpcm->spdif = pcm->spdif;476 rpcm->private_value = pcm->private_value;477 rpcm->bus = bus;478 rpcm->rates = ~0;479 slots = pcm->r[0].slots;480 for (j = 0; j < 4 && slots; j++) {481 if (!bus->codec[j])482 continue;483 rates = ~0;484 if (pcm->spdif && pcm->stream == 0)485 tmp = spdif_slots[j];486 else487 tmp = avail_slots[pcm->stream][j];488 if (pcm->exclusive) {489 /* exclusive access */490 tmp &= slots;491 for (k = 0; k < i; k++) {492 if (rpcm->stream == rpcms[k].stream)493 tmp &= ~rpcms[k].r[0].rslots[j];494 }495 } else {496 /* non-exclusive access */497 tmp &= pcm->r[0].slots;498 }499 if (tmp) {500 rpcm->r[0].rslots[j] = tmp;501 rpcm->r[0].codec[j] = bus->codec[j];502 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j];503 if (bus->no_vra)504 rates = SNDRV_PCM_RATE_48000;505 else506 rates = get_rates(rpcm, j, tmp, 0);507 if (pcm->exclusive)508 avail_slots[pcm->stream][j] &= ~tmp;509 }510 slots &= ~tmp;511 rpcm->r[0].slots |= tmp;512 rpcm->rates &= rates;513 }514 /* for double rate, we check the first codec only */515 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK &&516 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) &&517 rate_table[pcm->stream][0] == 0) {518 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) |519 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0);520 if ((tmp & pcm->r[1].slots) == tmp) {521 rpcm->r[1].slots = tmp;522 rpcm->r[1].rslots[0] = tmp;523 rpcm->r[1].rate_table[0] = 0;524 rpcm->r[1].codec[0] = bus->codec[0];525 if (pcm->exclusive)526 avail_slots[pcm->stream][0] &= ~tmp;527 if (bus->no_vra)528 rates = SNDRV_PCM_RATE_96000;529 else530 rates = get_rates(rpcm, 0, tmp, 1);531 rpcm->rates |= rates;532 }533 }534 if (rpcm->rates == ~0)535 rpcm->rates = 0; /* not used */536 }537 bus->pcms_count = pcms_count;538 bus->pcms = rpcms;539 return 0;540}541 542EXPORT_SYMBOL(snd_ac97_pcm_assign);543 544/**545 * snd_ac97_pcm_open - opens the given AC97 pcm546 * @pcm: the ac97 pcm instance547 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz548 * @cfg: output stream characteristics549 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm550 *551 * It locks the specified slots and sets the given rate to AC97 registers.552 *553 * Return: Zero if successful, or a negative error code on failure.554 */555int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,556 enum ac97_pcm_cfg cfg, unsigned short slots)557{558 struct snd_ac97_bus *bus;559 int i, cidx, r, ok_flag;560 unsigned int reg_ok[4] = {0,0,0,0};561 unsigned char reg;562 int err = 0;563 564 r = rate > 48000;565 bus = pcm->bus;566 if (cfg == AC97_PCM_CFG_SPDIF) {567 for (cidx = 0; cidx < 4; cidx++)568 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) {569 err = set_spdif_rate(bus->codec[cidx], rate);570 if (err < 0)571 return err;572 }573 }574 spin_lock_irq(&pcm->bus->bus_lock);575 for (i = 3; i < 12; i++) {576 if (!(slots & (1 << i)))577 continue;578 ok_flag = 0;579 for (cidx = 0; cidx < 4; cidx++) {580 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {581 spin_unlock_irq(&pcm->bus->bus_lock);582 err = -EBUSY;583 goto error;584 }585 if (pcm->r[r].rslots[cidx] & (1 << i)) {586 bus->used_slots[pcm->stream][cidx] |= (1 << i);587 ok_flag++;588 }589 }590 if (!ok_flag) {591 spin_unlock_irq(&pcm->bus->bus_lock);592 dev_err(bus->card->dev,593 "cannot find configuration for AC97 slot %i\n",594 i);595 err = -EAGAIN;596 goto error;597 }598 }599 pcm->cur_dbl = r;600 spin_unlock_irq(&pcm->bus->bus_lock);601 for (i = 3; i < 12; i++) {602 if (!(slots & (1 << i)))603 continue;604 for (cidx = 0; cidx < 4; cidx++) {605 if (pcm->r[r].rslots[cidx] & (1 << i)) {606 reg = get_slot_reg(pcm, cidx, i, r);607 if (reg == 0xff) {608 dev_err(bus->card->dev,609 "invalid AC97 slot %i?\n", i);610 continue;611 }612 if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE)))613 continue;614 dev_dbg(bus->card->dev,615 "setting ac97 reg 0x%x to rate %d\n",616 reg, rate);617 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate);618 if (err < 0)619 dev_err(bus->card->dev,620 "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n",621 cidx, reg, rate, err);622 else623 reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE));624 }625 }626 }627 pcm->aslots = slots;628 return 0;629 630 error:631 pcm->aslots = slots;632 snd_ac97_pcm_close(pcm);633 return err;634}635 636EXPORT_SYMBOL(snd_ac97_pcm_open);637 638/**639 * snd_ac97_pcm_close - closes the given AC97 pcm640 * @pcm: the ac97 pcm instance641 *642 * It frees the locked AC97 slots.643 *644 * Return: Zero.645 */646int snd_ac97_pcm_close(struct ac97_pcm *pcm)647{648 struct snd_ac97_bus *bus;649 unsigned short slots = pcm->aslots;650 int i, cidx;651 652#ifdef CONFIG_SND_AC97_POWER_SAVE653 int r = pcm->cur_dbl;654 for (i = 3; i < 12; i++) {655 if (!(slots & (1 << i)))656 continue;657 for (cidx = 0; cidx < 4; cidx++) {658 if (pcm->r[r].rslots[cidx] & (1 << i)) {659 int reg = get_slot_reg(pcm, cidx, i, r);660 snd_ac97_update_power(pcm->r[r].codec[cidx],661 reg, 0);662 }663 }664 }665#endif666 667 bus = pcm->bus;668 spin_lock_irq(&pcm->bus->bus_lock);669 for (i = 3; i < 12; i++) {670 if (!(slots & (1 << i)))671 continue;672 for (cidx = 0; cidx < 4; cidx++)673 bus->used_slots[pcm->stream][cidx] &= ~(1 << i);674 }675 pcm->aslots = 0;676 pcm->cur_dbl = 0;677 spin_unlock_irq(&pcm->bus->bus_lock);678 return 0;679}680 681EXPORT_SYMBOL(snd_ac97_pcm_close);682 683static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params,684 struct snd_pcm_hw_rule *rule)685{686 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);687 if (channels->min > 2) {688 static const struct snd_interval single_rates = {689 .min = 1,690 .max = 48000,691 };692 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);693 return snd_interval_refine(rate, &single_rates);694 }695 return 0;696}697 698static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params,699 struct snd_pcm_hw_rule *rule)700{701 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);702 if (rate->min > 48000) {703 static const struct snd_interval double_rate_channels = {704 .min = 2,705 .max = 2,706 };707 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);708 return snd_interval_refine(channels, &double_rate_channels);709 }710 return 0;711}712 713/**714 * snd_ac97_pcm_double_rate_rules - set double rate constraints715 * @runtime: the runtime of the ac97 front playback pcm716 *717 * Installs the hardware constraint rules to prevent using double rates and718 * more than two channels at the same time.719 *720 * Return: Zero if successful, or a negative error code on failure.721 */722int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime)723{724 int err;725 726 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,727 double_rate_hw_constraint_rate, NULL,728 SNDRV_PCM_HW_PARAM_CHANNELS, -1);729 if (err < 0)730 return err;731 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,732 double_rate_hw_constraint_channels, NULL,733 SNDRV_PCM_HW_PARAM_RATE, -1);734 return err;735}736 737EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules);738