1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * Universal interface for Audio Codec '97 5 * 6 * For more details look to AC '97 component specification revision 2.2 7 * by Intel Corporation (http://developer.intel.com) and to datasheets 8 * 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 support 27 */ 28 29 static 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? */ 132 static 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 get_slot_reg(struct ac97_pcm * pcm,unsigned short cidx,unsigned short slot,int dbl)144 static 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 else 156 return rate_cregs[slot - 3]; 157 } 158 set_spdif_rate(struct snd_ac97 * ac97,unsigned short rate)159 static 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 instance 227 * @reg: the register to change 228 * @rate: the sample rate to set 229 * 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 (except 232 * 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 accepted 237 * if the codec supports them. 238 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF 239 * status bits. 240 * 241 * Return: Zero if successful, or a negative error code on failure. 242 */ snd_ac97_set_rate(struct snd_ac97 * ac97,int reg,unsigned int rate)243 int 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 in 295 * slots 7+8 296 */ 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 } 304 305 EXPORT_SYMBOL(snd_ac97_set_rate); 306 get_pslots(struct snd_ac97 * ac97,unsigned char * rate_table,unsigned short * spdif_slots)307 static 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 else 337 *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 else 350 *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 else 375 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 376 } 377 *rate_table = 0; 378 return slots; 379 } 380 } 381 get_cslots(struct snd_ac97 * ac97)382 static 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 get_rates(struct ac97_pcm * pcm,unsigned int cidx,unsigned short slots,int dbl)393 static 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 streams 421 * @bus: the ac97 bus instance 422 * @pcms_count: count of PCMs to be assigned 423 * @pcms: PCMs to be assigned 424 * 425 * It assigns available AC97 slots for given PCMs. If none or only 426 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members 427 * are reduced and might be zero. 428 * 429 * Return: Zero if successful, or a negative error code on failure. 430 */ snd_ac97_pcm_assign(struct snd_ac97_bus * bus,unsigned short pcms_count,const struct ac97_pcm * pcms)431 int 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 else 487 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 else 506 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 else 530 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 } 541 542 EXPORT_SYMBOL(snd_ac97_pcm_assign); 543 544 /** 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 550 * 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 */ snd_ac97_pcm_open(struct ac97_pcm * pcm,unsigned int rate,enum ac97_pcm_cfg cfg,unsigned short slots)555 int 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 else 623 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 } 635 636 EXPORT_SYMBOL(snd_ac97_pcm_open); 637 638 /** 639 * snd_ac97_pcm_close - closes the given AC97 pcm 640 * @pcm: the ac97 pcm instance 641 * 642 * It frees the locked AC97 slots. 643 * 644 * Return: Zero. 645 */ snd_ac97_pcm_close(struct ac97_pcm * pcm)646 int 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_SAVE 653 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 #endif 666 667 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 } 680 681 EXPORT_SYMBOL(snd_ac97_pcm_close); 682 double_rate_hw_constraint_rate(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)683 static 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 double_rate_hw_constraint_channels(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)698 static 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 constraints 715 * @runtime: the runtime of the ac97 front playback pcm 716 * 717 * Installs the hardware constraint rules to prevent using double rates and 718 * more than two channels at the same time. 719 * 720 * Return: Zero if successful, or a negative error code on failure. 721 */ snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime * runtime)722 int 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 } 736 737 EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules); 738