1 /* 2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 3 * Universal interface for Audio Codec '97 4 * 5 * For more details look to AC '97 component specification revision 2.2 6 * by Intel Corporation (http://developer.intel.com) and to datasheets 7 * for specific codecs. 8 * 9 * 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. 14 * 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. 19 * 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 23 * 24 */ 25 26 #include <linux/delay.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/mutex.h> 30 #include <linux/export.h> 31 32 #include <sound/core.h> 33 #include <sound/pcm.h> 34 #include <sound/control.h> 35 #include <sound/ac97_codec.h> 36 #include <sound/asoundef.h> 37 #include "ac97_id.h" 38 #include "ac97_local.h" 39 40 /* 41 * PCM support 42 */ 43 44 static unsigned char rate_reg_tables[2][4][9] = { 45 { 46 /* standard rates */ 47 { 48 /* 3&4 front, 7&8 rear, 6&9 center/lfe */ 49 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ 50 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ 51 0xff, /* slot 5 */ 52 AC97_PCM_LFE_DAC_RATE, /* slot 6 */ 53 AC97_PCM_SURR_DAC_RATE, /* slot 7 */ 54 AC97_PCM_SURR_DAC_RATE, /* slot 8 */ 55 AC97_PCM_LFE_DAC_RATE, /* slot 9 */ 56 0xff, /* slot 10 */ 57 0xff, /* slot 11 */ 58 }, 59 { 60 /* 7&8 front, 6&9 rear, 10&11 center/lfe */ 61 0xff, /* slot 3 */ 62 0xff, /* slot 4 */ 63 0xff, /* slot 5 */ 64 AC97_PCM_SURR_DAC_RATE, /* slot 6 */ 65 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ 66 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ 67 AC97_PCM_SURR_DAC_RATE, /* slot 9 */ 68 AC97_PCM_LFE_DAC_RATE, /* slot 10 */ 69 AC97_PCM_LFE_DAC_RATE, /* slot 11 */ 70 }, 71 { 72 /* 6&9 front, 10&11 rear, 3&4 center/lfe */ 73 AC97_PCM_LFE_DAC_RATE, /* slot 3 */ 74 AC97_PCM_LFE_DAC_RATE, /* slot 4 */ 75 0xff, /* slot 5 */ 76 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */ 77 0xff, /* slot 7 */ 78 0xff, /* slot 8 */ 79 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */ 80 AC97_PCM_SURR_DAC_RATE, /* slot 10 */ 81 AC97_PCM_SURR_DAC_RATE, /* slot 11 */ 82 }, 83 { 84 /* 10&11 front, 3&4 rear, 7&8 center/lfe */ 85 AC97_PCM_SURR_DAC_RATE, /* slot 3 */ 86 AC97_PCM_SURR_DAC_RATE, /* slot 4 */ 87 0xff, /* slot 5 */ 88 0xff, /* slot 6 */ 89 AC97_PCM_LFE_DAC_RATE, /* slot 7 */ 90 AC97_PCM_LFE_DAC_RATE, /* slot 8 */ 91 0xff, /* slot 9 */ 92 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */ 93 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */ 94 }, 95 }, 96 { 97 /* double rates */ 98 { 99 /* 3&4 front, 7&8 front (t+1) */ 100 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ 101 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ 102 0xff, /* slot 5 */ 103 0xff, /* slot 6 */ 104 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ 105 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ 106 0xff, /* slot 9 */ 107 0xff, /* slot 10 */ 108 0xff, /* slot 11 */ 109 }, 110 { 111 /* not specified in the specification */ 112 0xff, /* slot 3 */ 113 0xff, /* slot 4 */ 114 0xff, /* slot 5 */ 115 0xff, /* slot 6 */ 116 0xff, /* slot 7 */ 117 0xff, /* slot 8 */ 118 0xff, /* slot 9 */ 119 0xff, /* slot 10 */ 120 0xff, /* slot 11 */ 121 }, 122 { 123 0xff, /* slot 3 */ 124 0xff, /* slot 4 */ 125 0xff, /* slot 5 */ 126 0xff, /* slot 6 */ 127 0xff, /* slot 7 */ 128 0xff, /* slot 8 */ 129 0xff, /* slot 9 */ 130 0xff, /* slot 10 */ 131 0xff, /* slot 11 */ 132 }, 133 { 134 0xff, /* slot 3 */ 135 0xff, /* slot 4 */ 136 0xff, /* slot 5 */ 137 0xff, /* slot 6 */ 138 0xff, /* slot 7 */ 139 0xff, /* slot 8 */ 140 0xff, /* slot 9 */ 141 0xff, /* slot 10 */ 142 0xff, /* slot 11 */ 143 } 144 }}; 145 146 /* FIXME: more various mappings for ADC? */ 147 static unsigned char rate_cregs[9] = { 148 AC97_PCM_LR_ADC_RATE, /* 3 */ 149 AC97_PCM_LR_ADC_RATE, /* 4 */ 150 0xff, /* 5 */ 151 AC97_PCM_MIC_ADC_RATE, /* 6 */ 152 0xff, /* 7 */ 153 0xff, /* 8 */ 154 0xff, /* 9 */ 155 0xff, /* 10 */ 156 0xff, /* 11 */ 157 }; 158 159 static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx, 160 unsigned short slot, int dbl) 161 { 162 if (slot < 3) 163 return 0xff; 164 if (slot > 11) 165 return 0xff; 166 if (pcm->spdif) 167 return AC97_SPDIF; /* pseudo register */ 168 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) 169 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3]; 170 else 171 return rate_cregs[slot - 3]; 172 } 173 174 static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate) 175 { 176 unsigned short old, bits, reg, mask; 177 unsigned int sbits; 178 179 if (! (ac97->ext_id & AC97_EI_SPDIF)) 180 return -ENODEV; 181 182 /* TODO: double rate support */ 183 if (ac97->flags & AC97_CS_SPDIF) { 184 switch (rate) { 185 case 48000: bits = 0; break; 186 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; 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_CSR_SPDIF; 192 mask = 1 << AC97_SC_SPSR_SHIFT; 193 } else { 194 if (ac97->id == AC97_ID_CM9739 && rate != 48000) { 195 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 196 return -EINVAL; 197 } 198 switch (rate) { 199 case 44100: bits = AC97_SC_SPSR_44K; break; 200 case 48000: bits = AC97_SC_SPSR_48K; break; 201 case 32000: bits = AC97_SC_SPSR_32K; break; 202 default: /* invalid - disable output */ 203 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 204 return -EINVAL; 205 } 206 reg = AC97_SPDIF; 207 mask = AC97_SC_SPSR_MASK; 208 } 209 210 mutex_lock(&ac97->reg_mutex); 211 old = snd_ac97_read(ac97, reg) & mask; 212 if (old != bits) { 213 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 214 snd_ac97_update_bits_nolock(ac97, reg, mask, bits); 215 /* update the internal spdif bits */ 216 sbits = ac97->spdif_status; 217 if (sbits & IEC958_AES0_PROFESSIONAL) { 218 sbits &= ~IEC958_AES0_PRO_FS; 219 switch (rate) { 220 case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break; 221 case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break; 222 case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break; 223 } 224 } else { 225 sbits &= ~(IEC958_AES3_CON_FS << 24); 226 switch (rate) { 227 case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break; 228 case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break; 229 case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break; 230 } 231 } 232 ac97->spdif_status = sbits; 233 } 234 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); 235 mutex_unlock(&ac97->reg_mutex); 236 return 0; 237 } 238 239 /** 240 * snd_ac97_set_rate - change the rate of the given input/output. 241 * @ac97: the ac97 instance 242 * @reg: the register to change 243 * @rate: the sample rate to set 244 * 245 * Changes the rate of the given input/output on the codec. 246 * If the codec doesn't support VAR, the rate must be 48000 (except 247 * for SPDIF). 248 * 249 * The valid registers are AC97_PMC_MIC_ADC_RATE, 250 * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE. 251 * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted 252 * if the codec supports them. 253 * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF 254 * status bits. 255 * 256 * Return: Zero if successful, or a negative error code on failure. 257 */ 258 int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate) 259 { 260 int dbl; 261 unsigned int tmp; 262 263 dbl = rate > 48000; 264 if (dbl) { 265 if (!(ac97->flags & AC97_DOUBLE_RATE)) 266 return -EINVAL; 267 if (reg != AC97_PCM_FRONT_DAC_RATE) 268 return -EINVAL; 269 } 270 271 snd_ac97_update_power(ac97, reg, 1); 272 switch (reg) { 273 case AC97_PCM_MIC_ADC_RATE: 274 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */ 275 if (rate != 48000) 276 return -EINVAL; 277 break; 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) 282 return -EINVAL; 283 break; 284 case AC97_PCM_SURR_DAC_RATE: 285 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC)) 286 return -EINVAL; 287 break; 288 case AC97_PCM_LFE_DAC_RATE: 289 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 290 return -EINVAL; 291 break; 292 case AC97_SPDIF: 293 /* special case */ 294 return set_spdif_rate(ac97, rate); 295 default: 296 return -EINVAL; 297 } 298 if (dbl) 299 rate /= 2; 300 tmp = (rate * ac97->bus->clock) / 48000; 301 if (tmp > 65535) 302 return -EINVAL; 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); 308 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) { 309 /* Intel controllers require double rate data to be put in 310 * slots 7+8 311 */ 312 snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, 313 AC97_GP_DRSS_MASK, 314 dbl ? AC97_GP_DRSS_78 : 0); 315 snd_ac97_read(ac97, AC97_GENERAL_PURPOSE); 316 } 317 return 0; 318 } 319 320 EXPORT_SYMBOL(snd_ac97_set_rate); 321 322 static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots) 323 { 324 if (!ac97_is_audio(ac97)) 325 return 0; 326 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) { 327 unsigned short slots = 0; 328 if (ac97_is_rev22(ac97)) { 329 /* Note: it's simply emulation of AMAP behaviour */ 330 u16 es; 331 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK; 332 switch (ac97->addr) { 333 case 1: 334 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break; 335 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break; 336 } 337 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es); 338 } 339 switch (ac97->addr) { 340 case 0: 341 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 342 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 343 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 344 if (ac97->scaps & AC97_SCAP_CENTER_LFE_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_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); 349 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 350 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 351 else 352 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 353 } 354 *rate_table = 0; 355 break; 356 case 1: 357 case 2: 358 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 359 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 360 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 361 if (ac97->ext_id & AC97_EI_SPDIF) { 362 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) 363 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 364 else 365 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 366 } 367 *rate_table = 1; 368 break; 369 case 3: 370 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 371 if (ac97->ext_id & AC97_EI_SPDIF) 372 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 373 *rate_table = 2; 374 break; 375 } 376 return slots; 377 } else { 378 unsigned short slots; 379 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 380 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 381 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 382 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) 383 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 384 if (ac97->ext_id & AC97_EI_SPDIF) { 385 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) 386 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); 387 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 388 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 389 else 390 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 391 } 392 *rate_table = 0; 393 return slots; 394 } 395 } 396 397 static unsigned short get_cslots(struct snd_ac97 *ac97) 398 { 399 unsigned short slots; 400 401 if (!ac97_is_audio(ac97)) 402 return 0; 403 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 404 slots |= (1<<AC97_SLOT_MIC); 405 return slots; 406 } 407 408 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl) 409 { 410 int i, idx; 411 unsigned int rates = ~0; 412 unsigned char reg; 413 414 for (i = 3; i < 12; i++) { 415 if (!(slots & (1 << i))) 416 continue; 417 reg = get_slot_reg(pcm, cidx, i, dbl); 418 switch (reg) { 419 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break; 420 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break; 421 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break; 422 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break; 423 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break; 424 default: idx = AC97_RATES_SPDIF; break; 425 } 426 rates &= pcm->r[dbl].codec[cidx]->rates[idx]; 427 } 428 if (!dbl) 429 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | 430 SNDRV_PCM_RATE_96000); 431 return rates; 432 } 433 434 /** 435 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams 436 * @bus: the ac97 bus instance 437 * @pcms_count: count of PCMs to be assigned 438 * @pcms: PCMs to be assigned 439 * 440 * It assigns available AC97 slots for given PCMs. If none or only 441 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members 442 * are reduced and might be zero. 443 * 444 * Return: Zero if successful, or a negative error code on failure. 445 */ 446 int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, 447 unsigned short pcms_count, 448 const struct ac97_pcm *pcms) 449 { 450 int i, j, k; 451 const struct ac97_pcm *pcm; 452 struct ac97_pcm *rpcms, *rpcm; 453 unsigned short avail_slots[2][4]; 454 unsigned char rate_table[2][4]; 455 unsigned short tmp, slots; 456 unsigned short spdif_slots[4]; 457 unsigned int rates; 458 struct snd_ac97 *codec; 459 460 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL); 461 if (rpcms == NULL) 462 return -ENOMEM; 463 memset(avail_slots, 0, sizeof(avail_slots)); 464 memset(rate_table, 0, sizeof(rate_table)); 465 memset(spdif_slots, 0, sizeof(spdif_slots)); 466 for (i = 0; i < 4; i++) { 467 codec = bus->codec[i]; 468 if (!codec) 469 continue; 470 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]); 471 avail_slots[1][i] = get_cslots(codec); 472 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) { 473 for (j = 0; j < i; j++) { 474 if (bus->codec[j]) 475 avail_slots[1][i] &= ~avail_slots[1][j]; 476 } 477 } 478 } 479 /* first step - exclusive devices */ 480 for (i = 0; i < pcms_count; i++) { 481 pcm = &pcms[i]; 482 rpcm = &rpcms[i]; 483 /* low-level driver thinks that it's more clever */ 484 if (pcm->copy_flag) { 485 *rpcm = *pcm; 486 continue; 487 } 488 rpcm->stream = pcm->stream; 489 rpcm->exclusive = pcm->exclusive; 490 rpcm->spdif = pcm->spdif; 491 rpcm->private_value = pcm->private_value; 492 rpcm->bus = bus; 493 rpcm->rates = ~0; 494 slots = pcm->r[0].slots; 495 for (j = 0; j < 4 && slots; j++) { 496 if (!bus->codec[j]) 497 continue; 498 rates = ~0; 499 if (pcm->spdif && pcm->stream == 0) 500 tmp = spdif_slots[j]; 501 else 502 tmp = avail_slots[pcm->stream][j]; 503 if (pcm->exclusive) { 504 /* exclusive access */ 505 tmp &= slots; 506 for (k = 0; k < i; k++) { 507 if (rpcm->stream == rpcms[k].stream) 508 tmp &= ~rpcms[k].r[0].rslots[j]; 509 } 510 } else { 511 /* non-exclusive access */ 512 tmp &= pcm->r[0].slots; 513 } 514 if (tmp) { 515 rpcm->r[0].rslots[j] = tmp; 516 rpcm->r[0].codec[j] = bus->codec[j]; 517 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j]; 518 if (bus->no_vra) 519 rates = SNDRV_PCM_RATE_48000; 520 else 521 rates = get_rates(rpcm, j, tmp, 0); 522 if (pcm->exclusive) 523 avail_slots[pcm->stream][j] &= ~tmp; 524 } 525 slots &= ~tmp; 526 rpcm->r[0].slots |= tmp; 527 rpcm->rates &= rates; 528 } 529 /* for double rate, we check the first codec only */ 530 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK && 531 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) && 532 rate_table[pcm->stream][0] == 0) { 533 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) | 534 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0); 535 if ((tmp & pcm->r[1].slots) == tmp) { 536 rpcm->r[1].slots = tmp; 537 rpcm->r[1].rslots[0] = tmp; 538 rpcm->r[1].rate_table[0] = 0; 539 rpcm->r[1].codec[0] = bus->codec[0]; 540 if (pcm->exclusive) 541 avail_slots[pcm->stream][0] &= ~tmp; 542 if (bus->no_vra) 543 rates = SNDRV_PCM_RATE_96000; 544 else 545 rates = get_rates(rpcm, 0, tmp, 1); 546 rpcm->rates |= rates; 547 } 548 } 549 if (rpcm->rates == ~0) 550 rpcm->rates = 0; /* not used */ 551 } 552 bus->pcms_count = pcms_count; 553 bus->pcms = rpcms; 554 return 0; 555 } 556 557 EXPORT_SYMBOL(snd_ac97_pcm_assign); 558 559 /** 560 * snd_ac97_pcm_open - opens the given AC97 pcm 561 * @pcm: the ac97 pcm instance 562 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz 563 * @cfg: output stream characteristics 564 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm 565 * 566 * It locks the specified slots and sets the given rate to AC97 registers. 567 * 568 * Return: Zero if successful, or a negative error code on failure. 569 */ 570 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate, 571 enum ac97_pcm_cfg cfg, unsigned short slots) 572 { 573 struct snd_ac97_bus *bus; 574 int i, cidx, r, ok_flag; 575 unsigned int reg_ok[4] = {0,0,0,0}; 576 unsigned char reg; 577 int err = 0; 578 579 r = rate > 48000; 580 bus = pcm->bus; 581 if (cfg == AC97_PCM_CFG_SPDIF) { 582 for (cidx = 0; cidx < 4; cidx++) 583 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) { 584 err = set_spdif_rate(bus->codec[cidx], rate); 585 if (err < 0) 586 return err; 587 } 588 } 589 spin_lock_irq(&pcm->bus->bus_lock); 590 for (i = 3; i < 12; i++) { 591 if (!(slots & (1 << i))) 592 continue; 593 ok_flag = 0; 594 for (cidx = 0; cidx < 4; cidx++) { 595 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) { 596 spin_unlock_irq(&pcm->bus->bus_lock); 597 err = -EBUSY; 598 goto error; 599 } 600 if (pcm->r[r].rslots[cidx] & (1 << i)) { 601 bus->used_slots[pcm->stream][cidx] |= (1 << i); 602 ok_flag++; 603 } 604 } 605 if (!ok_flag) { 606 spin_unlock_irq(&pcm->bus->bus_lock); 607 dev_err(bus->card->dev, 608 "cannot find configuration for AC97 slot %i\n", 609 i); 610 err = -EAGAIN; 611 goto error; 612 } 613 } 614 pcm->cur_dbl = r; 615 spin_unlock_irq(&pcm->bus->bus_lock); 616 for (i = 3; i < 12; i++) { 617 if (!(slots & (1 << i))) 618 continue; 619 for (cidx = 0; cidx < 4; cidx++) { 620 if (pcm->r[r].rslots[cidx] & (1 << i)) { 621 reg = get_slot_reg(pcm, cidx, i, r); 622 if (reg == 0xff) { 623 dev_err(bus->card->dev, 624 "invalid AC97 slot %i?\n", i); 625 continue; 626 } 627 if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE))) 628 continue; 629 dev_dbg(bus->card->dev, 630 "setting ac97 reg 0x%x to rate %d\n", 631 reg, rate); 632 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate); 633 if (err < 0) 634 dev_err(bus->card->dev, 635 "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", 636 cidx, reg, rate, err); 637 else 638 reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE)); 639 } 640 } 641 } 642 pcm->aslots = slots; 643 return 0; 644 645 error: 646 pcm->aslots = slots; 647 snd_ac97_pcm_close(pcm); 648 return err; 649 } 650 651 EXPORT_SYMBOL(snd_ac97_pcm_open); 652 653 /** 654 * snd_ac97_pcm_close - closes the given AC97 pcm 655 * @pcm: the ac97 pcm instance 656 * 657 * It frees the locked AC97 slots. 658 * 659 * Return: Zero. 660 */ 661 int snd_ac97_pcm_close(struct ac97_pcm *pcm) 662 { 663 struct snd_ac97_bus *bus; 664 unsigned short slots = pcm->aslots; 665 int i, cidx; 666 667 #ifdef CONFIG_SND_AC97_POWER_SAVE 668 int r = pcm->cur_dbl; 669 for (i = 3; i < 12; i++) { 670 if (!(slots & (1 << i))) 671 continue; 672 for (cidx = 0; cidx < 4; cidx++) { 673 if (pcm->r[r].rslots[cidx] & (1 << i)) { 674 int reg = get_slot_reg(pcm, cidx, i, r); 675 snd_ac97_update_power(pcm->r[r].codec[cidx], 676 reg, 0); 677 } 678 } 679 } 680 #endif 681 682 bus = pcm->bus; 683 spin_lock_irq(&pcm->bus->bus_lock); 684 for (i = 3; i < 12; i++) { 685 if (!(slots & (1 << i))) 686 continue; 687 for (cidx = 0; cidx < 4; cidx++) 688 bus->used_slots[pcm->stream][cidx] &= ~(1 << i); 689 } 690 pcm->aslots = 0; 691 pcm->cur_dbl = 0; 692 spin_unlock_irq(&pcm->bus->bus_lock); 693 return 0; 694 } 695 696 EXPORT_SYMBOL(snd_ac97_pcm_close); 697 698 static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params, 699 struct snd_pcm_hw_rule *rule) 700 { 701 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 702 if (channels->min > 2) { 703 static const struct snd_interval single_rates = { 704 .min = 1, 705 .max = 48000, 706 }; 707 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 708 return snd_interval_refine(rate, &single_rates); 709 } 710 return 0; 711 } 712 713 static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params, 714 struct snd_pcm_hw_rule *rule) 715 { 716 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 717 if (rate->min > 48000) { 718 static const struct snd_interval double_rate_channels = { 719 .min = 2, 720 .max = 2, 721 }; 722 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 723 return snd_interval_refine(channels, &double_rate_channels); 724 } 725 return 0; 726 } 727 728 /** 729 * snd_ac97_pcm_double_rate_rules - set double rate constraints 730 * @runtime: the runtime of the ac97 front playback pcm 731 * 732 * Installs the hardware constraint rules to prevent using double rates and 733 * more than two channels at the same time. 734 * 735 * Return: Zero if successful, or a negative error code on failure. 736 */ 737 int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime) 738 { 739 int err; 740 741 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 742 double_rate_hw_constraint_rate, NULL, 743 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 744 if (err < 0) 745 return err; 746 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 747 double_rate_hw_constraint_channels, NULL, 748 SNDRV_PCM_HW_PARAM_RATE, -1); 749 return err; 750 } 751 752 EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules); 753