1 /* 2 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> 27 #include <linux/delay.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/mutex.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_patch.h" 38 #include "ac97_id.h" 39 #include "ac97_local.h" 40 41 /* 42 * PCM support 43 */ 44 45 static unsigned char rate_reg_tables[2][4][9] = { 46 { 47 /* standard rates */ 48 { 49 /* 3&4 front, 7&8 rear, 6&9 center/lfe */ 50 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ 51 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ 52 0xff, /* slot 5 */ 53 AC97_PCM_LFE_DAC_RATE, /* slot 6 */ 54 AC97_PCM_SURR_DAC_RATE, /* slot 7 */ 55 AC97_PCM_SURR_DAC_RATE, /* slot 8 */ 56 AC97_PCM_LFE_DAC_RATE, /* slot 9 */ 57 0xff, /* slot 10 */ 58 0xff, /* slot 11 */ 59 }, 60 { 61 /* 7&8 front, 6&9 rear, 10&11 center/lfe */ 62 0xff, /* slot 3 */ 63 0xff, /* slot 4 */ 64 0xff, /* slot 5 */ 65 AC97_PCM_SURR_DAC_RATE, /* slot 6 */ 66 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ 67 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ 68 AC97_PCM_SURR_DAC_RATE, /* slot 9 */ 69 AC97_PCM_LFE_DAC_RATE, /* slot 10 */ 70 AC97_PCM_LFE_DAC_RATE, /* slot 11 */ 71 }, 72 { 73 /* 6&9 front, 10&11 rear, 3&4 center/lfe */ 74 AC97_PCM_LFE_DAC_RATE, /* slot 3 */ 75 AC97_PCM_LFE_DAC_RATE, /* slot 4 */ 76 0xff, /* slot 5 */ 77 AC97_PCM_FRONT_DAC_RATE, /* slot 6 */ 78 0xff, /* slot 7 */ 79 0xff, /* slot 8 */ 80 AC97_PCM_FRONT_DAC_RATE, /* slot 9 */ 81 AC97_PCM_SURR_DAC_RATE, /* slot 10 */ 82 AC97_PCM_SURR_DAC_RATE, /* slot 11 */ 83 }, 84 { 85 /* 10&11 front, 3&4 rear, 7&8 center/lfe */ 86 AC97_PCM_SURR_DAC_RATE, /* slot 3 */ 87 AC97_PCM_SURR_DAC_RATE, /* slot 4 */ 88 0xff, /* slot 5 */ 89 0xff, /* slot 6 */ 90 AC97_PCM_LFE_DAC_RATE, /* slot 7 */ 91 AC97_PCM_LFE_DAC_RATE, /* slot 8 */ 92 0xff, /* slot 9 */ 93 AC97_PCM_FRONT_DAC_RATE, /* slot 10 */ 94 AC97_PCM_FRONT_DAC_RATE, /* slot 11 */ 95 }, 96 }, 97 { 98 /* double rates */ 99 { 100 /* 3&4 front, 7&8 front (t+1) */ 101 AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ 102 AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ 103 0xff, /* slot 5 */ 104 0xff, /* slot 6 */ 105 AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ 106 AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ 107 0xff, /* slot 9 */ 108 0xff, /* slot 10 */ 109 0xff, /* slot 11 */ 110 }, 111 { 112 /* not specified in the specification */ 113 0xff, /* slot 3 */ 114 0xff, /* slot 4 */ 115 0xff, /* slot 5 */ 116 0xff, /* slot 6 */ 117 0xff, /* slot 7 */ 118 0xff, /* slot 8 */ 119 0xff, /* slot 9 */ 120 0xff, /* slot 10 */ 121 0xff, /* slot 11 */ 122 }, 123 { 124 0xff, /* slot 3 */ 125 0xff, /* slot 4 */ 126 0xff, /* slot 5 */ 127 0xff, /* slot 6 */ 128 0xff, /* slot 7 */ 129 0xff, /* slot 8 */ 130 0xff, /* slot 9 */ 131 0xff, /* slot 10 */ 132 0xff, /* slot 11 */ 133 }, 134 { 135 0xff, /* slot 3 */ 136 0xff, /* slot 4 */ 137 0xff, /* slot 5 */ 138 0xff, /* slot 6 */ 139 0xff, /* slot 7 */ 140 0xff, /* slot 8 */ 141 0xff, /* slot 9 */ 142 0xff, /* slot 10 */ 143 0xff, /* slot 11 */ 144 } 145 }}; 146 147 /* FIXME: more various mappings for ADC? */ 148 static unsigned char rate_cregs[9] = { 149 AC97_PCM_LR_ADC_RATE, /* 3 */ 150 AC97_PCM_LR_ADC_RATE, /* 4 */ 151 0xff, /* 5 */ 152 AC97_PCM_MIC_ADC_RATE, /* 6 */ 153 0xff, /* 7 */ 154 0xff, /* 8 */ 155 0xff, /* 9 */ 156 0xff, /* 10 */ 157 0xff, /* 11 */ 158 }; 159 160 static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx, 161 unsigned short slot, int dbl) 162 { 163 if (slot < 3) 164 return 0xff; 165 if (slot > 11) 166 return 0xff; 167 if (pcm->spdif) 168 return AC97_SPDIF; /* pseudo register */ 169 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) 170 return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3]; 171 else 172 return rate_cregs[slot - 3]; 173 } 174 175 static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate) 176 { 177 unsigned short old, bits, reg, mask; 178 unsigned int sbits; 179 180 if (! (ac97->ext_id & AC97_EI_SPDIF)) 181 return -ENODEV; 182 183 /* TODO: double rate support */ 184 if (ac97->flags & AC97_CS_SPDIF) { 185 switch (rate) { 186 case 48000: bits = 0; break; 187 case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break; 188 default: /* invalid - disable output */ 189 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 190 return -EINVAL; 191 } 192 reg = AC97_CSR_SPDIF; 193 mask = 1 << AC97_SC_SPSR_SHIFT; 194 } else { 195 if (ac97->id == AC97_ID_CM9739 && rate != 48000) { 196 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 197 return -EINVAL; 198 } 199 switch (rate) { 200 case 44100: bits = AC97_SC_SPSR_44K; break; 201 case 48000: bits = AC97_SC_SPSR_48K; break; 202 case 32000: bits = AC97_SC_SPSR_32K; break; 203 default: /* invalid - disable output */ 204 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 205 return -EINVAL; 206 } 207 reg = AC97_SPDIF; 208 mask = AC97_SC_SPSR_MASK; 209 } 210 211 mutex_lock(&ac97->reg_mutex); 212 old = snd_ac97_read(ac97, reg) & mask; 213 if (old != bits) { 214 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); 215 snd_ac97_update_bits_nolock(ac97, reg, mask, bits); 216 /* update the internal spdif bits */ 217 sbits = ac97->spdif_status; 218 if (sbits & IEC958_AES0_PROFESSIONAL) { 219 sbits &= ~IEC958_AES0_PRO_FS; 220 switch (rate) { 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; 224 } 225 } else { 226 sbits &= ~(IEC958_AES3_CON_FS << 24); 227 switch (rate) { 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; 231 } 232 } 233 ac97->spdif_status = sbits; 234 } 235 snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); 236 mutex_unlock(&ac97->reg_mutex); 237 return 0; 238 } 239 240 /** 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 245 * 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 248 * for SPDIF). 249 * 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 255 * status bits. 256 * 257 * Returns zero if successful, or a negative error code on failure. 258 */ 259 int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate) 260 { 261 int dbl; 262 unsigned int tmp; 263 264 dbl = rate > 48000; 265 if (dbl) { 266 if (!(ac97->flags & AC97_DOUBLE_RATE)) 267 return -EINVAL; 268 if (reg != AC97_PCM_FRONT_DAC_RATE) 269 return -EINVAL; 270 } 271 272 snd_ac97_update_power(ac97, reg, 1); 273 switch (reg) { 274 case AC97_PCM_MIC_ADC_RATE: 275 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */ 276 if (rate != 48000) 277 return -EINVAL; 278 break; 279 case AC97_PCM_FRONT_DAC_RATE: 280 case AC97_PCM_LR_ADC_RATE: 281 if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */ 282 if (rate != 48000 && rate != 96000) 283 return -EINVAL; 284 break; 285 case AC97_PCM_SURR_DAC_RATE: 286 if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC)) 287 return -EINVAL; 288 break; 289 case AC97_PCM_LFE_DAC_RATE: 290 if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 291 return -EINVAL; 292 break; 293 case AC97_SPDIF: 294 /* special case */ 295 return set_spdif_rate(ac97, rate); 296 default: 297 return -EINVAL; 298 } 299 if (dbl) 300 rate /= 2; 301 tmp = (rate * ac97->bus->clock) / 48000; 302 if (tmp > 65535) 303 return -EINVAL; 304 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) 305 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, 306 AC97_EA_DRA, dbl ? AC97_EA_DRA : 0); 307 snd_ac97_update(ac97, reg, tmp & 0xffff); 308 snd_ac97_read(ac97, reg); 309 if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) { 310 /* Intel controllers require double rate data to be put in 311 * slots 7+8 312 */ 313 snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, 314 AC97_GP_DRSS_MASK, 315 dbl ? AC97_GP_DRSS_78 : 0); 316 snd_ac97_read(ac97, AC97_GENERAL_PURPOSE); 317 } 318 return 0; 319 } 320 321 EXPORT_SYMBOL(snd_ac97_set_rate); 322 323 static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots) 324 { 325 if (!ac97_is_audio(ac97)) 326 return 0; 327 if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) { 328 unsigned short slots = 0; 329 if (ac97_is_rev22(ac97)) { 330 /* Note: it's simply emulation of AMAP behaviour */ 331 u16 es; 332 es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK; 333 switch (ac97->addr) { 334 case 1: 335 case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break; 336 case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break; 337 } 338 snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es); 339 } 340 switch (ac97->addr) { 341 case 0: 342 slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 343 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 344 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 345 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) 346 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 347 if (ac97->ext_id & AC97_EI_SPDIF) { 348 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) 349 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); 350 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 351 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 352 else 353 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 354 } 355 *rate_table = 0; 356 break; 357 case 1: 358 case 2: 359 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 360 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 361 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 362 if (ac97->ext_id & AC97_EI_SPDIF) { 363 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) 364 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 365 else 366 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 367 } 368 *rate_table = 1; 369 break; 370 case 3: 371 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 372 if (ac97->ext_id & AC97_EI_SPDIF) 373 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 374 *rate_table = 2; 375 break; 376 } 377 return slots; 378 } else { 379 unsigned short slots; 380 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 381 if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 382 slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); 383 if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) 384 slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); 385 if (ac97->ext_id & AC97_EI_SPDIF) { 386 if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) 387 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); 388 else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) 389 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); 390 else 391 *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); 392 } 393 *rate_table = 0; 394 return slots; 395 } 396 } 397 398 static unsigned short get_cslots(struct snd_ac97 *ac97) 399 { 400 unsigned short slots; 401 402 if (!ac97_is_audio(ac97)) 403 return 0; 404 slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); 405 slots |= (1<<AC97_SLOT_MIC); 406 return slots; 407 } 408 409 static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl) 410 { 411 int i, idx; 412 unsigned int rates = ~0; 413 unsigned char reg; 414 415 for (i = 3; i < 12; i++) { 416 if (!(slots & (1 << i))) 417 continue; 418 reg = get_slot_reg(pcm, cidx, i, dbl); 419 switch (reg) { 420 case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break; 421 case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break; 422 case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break; 423 case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break; 424 case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break; 425 default: idx = AC97_RATES_SPDIF; break; 426 } 427 rates &= pcm->r[dbl].codec[cidx]->rates[idx]; 428 } 429 if (!dbl) 430 rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | 431 SNDRV_PCM_RATE_96000); 432 return rates; 433 } 434 435 /** 436 * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams 437 * @bus: the ac97 bus instance 438 * @pcms_count: count of PCMs to be assigned 439 * @pcms: PCMs to be assigned 440 * 441 * It assigns available AC97 slots for given PCMs. If none or only 442 * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members 443 * are reduced and might be zero. 444 */ 445 int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, 446 unsigned short pcms_count, 447 const struct ac97_pcm *pcms) 448 { 449 int i, j, k; 450 const struct ac97_pcm *pcm; 451 struct ac97_pcm *rpcms, *rpcm; 452 unsigned short avail_slots[2][4]; 453 unsigned char rate_table[2][4]; 454 unsigned short tmp, slots; 455 unsigned short spdif_slots[4]; 456 unsigned int rates; 457 struct snd_ac97 *codec; 458 459 rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL); 460 if (rpcms == NULL) 461 return -ENOMEM; 462 memset(avail_slots, 0, sizeof(avail_slots)); 463 memset(rate_table, 0, sizeof(rate_table)); 464 memset(spdif_slots, 0, sizeof(spdif_slots)); 465 for (i = 0; i < 4; i++) { 466 codec = bus->codec[i]; 467 if (!codec) 468 continue; 469 avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]); 470 avail_slots[1][i] = get_cslots(codec); 471 if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) { 472 for (j = 0; j < i; j++) { 473 if (bus->codec[j]) 474 avail_slots[1][i] &= ~avail_slots[1][j]; 475 } 476 } 477 } 478 /* first step - exclusive devices */ 479 for (i = 0; i < pcms_count; i++) { 480 pcm = &pcms[i]; 481 rpcm = &rpcms[i]; 482 /* low-level driver thinks that it's more clever */ 483 if (pcm->copy_flag) { 484 *rpcm = *pcm; 485 continue; 486 } 487 rpcm->stream = pcm->stream; 488 rpcm->exclusive = pcm->exclusive; 489 rpcm->spdif = pcm->spdif; 490 rpcm->private_value = pcm->private_value; 491 rpcm->bus = bus; 492 rpcm->rates = ~0; 493 slots = pcm->r[0].slots; 494 for (j = 0; j < 4 && slots; j++) { 495 if (!bus->codec[j]) 496 continue; 497 rates = ~0; 498 if (pcm->spdif && pcm->stream == 0) 499 tmp = spdif_slots[j]; 500 else 501 tmp = avail_slots[pcm->stream][j]; 502 if (pcm->exclusive) { 503 /* exclusive access */ 504 tmp &= slots; 505 for (k = 0; k < i; k++) { 506 if (rpcm->stream == rpcms[k].stream) 507 tmp &= ~rpcms[k].r[0].rslots[j]; 508 } 509 } else { 510 /* non-exclusive access */ 511 tmp &= pcm->r[0].slots; 512 } 513 if (tmp) { 514 rpcm->r[0].rslots[j] = tmp; 515 rpcm->r[0].codec[j] = bus->codec[j]; 516 rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j]; 517 if (bus->no_vra) 518 rates = SNDRV_PCM_RATE_48000; 519 else 520 rates = get_rates(rpcm, j, tmp, 0); 521 if (pcm->exclusive) 522 avail_slots[pcm->stream][j] &= ~tmp; 523 } 524 slots &= ~tmp; 525 rpcm->r[0].slots |= tmp; 526 rpcm->rates &= rates; 527 } 528 /* for double rate, we check the first codec only */ 529 if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK && 530 bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) && 531 rate_table[pcm->stream][0] == 0) { 532 tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) | 533 (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0); 534 if ((tmp & pcm->r[1].slots) == tmp) { 535 rpcm->r[1].slots = tmp; 536 rpcm->r[1].rslots[0] = tmp; 537 rpcm->r[1].rate_table[0] = 0; 538 rpcm->r[1].codec[0] = bus->codec[0]; 539 if (pcm->exclusive) 540 avail_slots[pcm->stream][0] &= ~tmp; 541 if (bus->no_vra) 542 rates = SNDRV_PCM_RATE_96000; 543 else 544 rates = get_rates(rpcm, 0, tmp, 1); 545 rpcm->rates |= rates; 546 } 547 } 548 if (rpcm->rates == ~0) 549 rpcm->rates = 0; /* not used */ 550 } 551 bus->pcms_count = pcms_count; 552 bus->pcms = rpcms; 553 return 0; 554 } 555 556 EXPORT_SYMBOL(snd_ac97_pcm_assign); 557 558 /** 559 * snd_ac97_pcm_open - opens the given AC97 pcm 560 * @pcm: the ac97 pcm instance 561 * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz 562 * @cfg: output stream characteristics 563 * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm 564 * 565 * It locks the specified slots and sets the given rate to AC97 registers. 566 */ 567 int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate, 568 enum ac97_pcm_cfg cfg, unsigned short slots) 569 { 570 struct snd_ac97_bus *bus; 571 int i, cidx, r, ok_flag; 572 unsigned int reg_ok[4] = {0,0,0,0}; 573 unsigned char reg; 574 int err = 0; 575 576 r = rate > 48000; 577 bus = pcm->bus; 578 if (cfg == AC97_PCM_CFG_SPDIF) { 579 int err; 580 for (cidx = 0; cidx < 4; cidx++) 581 if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) { 582 err = set_spdif_rate(bus->codec[cidx], rate); 583 if (err < 0) 584 return err; 585 } 586 } 587 spin_lock_irq(&pcm->bus->bus_lock); 588 for (i = 3; i < 12; i++) { 589 if (!(slots & (1 << i))) 590 continue; 591 ok_flag = 0; 592 for (cidx = 0; cidx < 4; cidx++) { 593 if (bus->used_slots[pcm->stream][cidx] & (1 << i)) { 594 spin_unlock_irq(&pcm->bus->bus_lock); 595 err = -EBUSY; 596 goto error; 597 } 598 if (pcm->r[r].rslots[cidx] & (1 << i)) { 599 bus->used_slots[pcm->stream][cidx] |= (1 << i); 600 ok_flag++; 601 } 602 } 603 if (!ok_flag) { 604 spin_unlock_irq(&pcm->bus->bus_lock); 605 snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i); 606 err = -EAGAIN; 607 goto error; 608 } 609 } 610 pcm->cur_dbl = r; 611 spin_unlock_irq(&pcm->bus->bus_lock); 612 for (i = 3; i < 12; i++) { 613 if (!(slots & (1 << i))) 614 continue; 615 for (cidx = 0; cidx < 4; cidx++) { 616 if (pcm->r[r].rslots[cidx] & (1 << i)) { 617 reg = get_slot_reg(pcm, cidx, i, r); 618 if (reg == 0xff) { 619 snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i); 620 continue; 621 } 622 if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE))) 623 continue; 624 //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate); 625 err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate); 626 if (err < 0) 627 snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err); 628 else 629 reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE)); 630 } 631 } 632 } 633 pcm->aslots = slots; 634 return 0; 635 636 error: 637 pcm->aslots = slots; 638 snd_ac97_pcm_close(pcm); 639 return err; 640 } 641 642 EXPORT_SYMBOL(snd_ac97_pcm_open); 643 644 /** 645 * snd_ac97_pcm_close - closes the given AC97 pcm 646 * @pcm: the ac97 pcm instance 647 * 648 * It frees the locked AC97 slots. 649 */ 650 int snd_ac97_pcm_close(struct ac97_pcm *pcm) 651 { 652 struct snd_ac97_bus *bus; 653 unsigned short slots = pcm->aslots; 654 int i, cidx; 655 656 #ifdef CONFIG_SND_AC97_POWER_SAVE 657 int r = pcm->cur_dbl; 658 for (i = 3; i < 12; i++) { 659 if (!(slots & (1 << i))) 660 continue; 661 for (cidx = 0; cidx < 4; cidx++) { 662 if (pcm->r[r].rslots[cidx] & (1 << i)) { 663 int reg = get_slot_reg(pcm, cidx, i, r); 664 snd_ac97_update_power(pcm->r[r].codec[cidx], 665 reg, 0); 666 } 667 } 668 } 669 #endif 670 671 bus = pcm->bus; 672 spin_lock_irq(&pcm->bus->bus_lock); 673 for (i = 3; i < 12; i++) { 674 if (!(slots & (1 << i))) 675 continue; 676 for (cidx = 0; cidx < 4; cidx++) 677 bus->used_slots[pcm->stream][cidx] &= ~(1 << i); 678 } 679 pcm->aslots = 0; 680 pcm->cur_dbl = 0; 681 spin_unlock_irq(&pcm->bus->bus_lock); 682 return 0; 683 } 684 685 EXPORT_SYMBOL(snd_ac97_pcm_close); 686 687 static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params, 688 struct snd_pcm_hw_rule *rule) 689 { 690 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 691 if (channels->min > 2) { 692 static const struct snd_interval single_rates = { 693 .min = 1, 694 .max = 48000, 695 }; 696 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 697 return snd_interval_refine(rate, &single_rates); 698 } 699 return 0; 700 } 701 702 static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params, 703 struct snd_pcm_hw_rule *rule) 704 { 705 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 706 if (rate->min > 48000) { 707 static const struct snd_interval double_rate_channels = { 708 .min = 2, 709 .max = 2, 710 }; 711 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 712 return snd_interval_refine(channels, &double_rate_channels); 713 } 714 return 0; 715 } 716 717 /** 718 * snd_ac97_pcm_double_rate_rules - set double rate constraints 719 * @runtime: the runtime of the ac97 front playback pcm 720 * 721 * Installs the hardware constraint rules to prevent using double rates and 722 * more than two channels at the same time. 723 */ 724 int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime) 725 { 726 int err; 727 728 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 729 double_rate_hw_constraint_rate, NULL, 730 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 731 if (err < 0) 732 return err; 733 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 734 double_rate_hw_constraint_channels, NULL, 735 SNDRV_PCM_HW_PARAM_RATE, -1); 736 return err; 737 } 738 739 EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules); 740