1/* 2 * Routines for control of the CS8427 via i2c bus 3 * IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic 4 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 5 * 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23#include <sound/driver.h> 24#include <linux/slab.h> 25#include <linux/delay.h> 26#include <linux/init.h> 27#include <sound/core.h> 28#include <sound/control.h> 29#include <sound/pcm.h> 30#include <sound/cs8427.h> 31#include <sound/asoundef.h> 32 33static void snd_cs8427_reset(struct snd_i2c_device *cs8427); 34 35MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 36MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic"); 37MODULE_LICENSE("GPL"); 38 39#define CS8427_ADDR (0x20>>1) /* fixed address */ 40 41struct cs8427_stream { 42 struct snd_pcm_substream *substream; 43 char hw_status[24]; /* hardware status */ 44 char def_status[24]; /* default status */ 45 char pcm_status[24]; /* PCM private status */ 46 char hw_udata[32]; 47 struct snd_kcontrol *pcm_ctl; 48}; 49 50struct cs8427 { 51 unsigned char regmap[0x14]; /* map of first 1 + 13 registers */ 52 unsigned int rate; 53 unsigned int reset_timeout; 54 struct cs8427_stream playback; 55 struct cs8427_stream capture; 56}; 57 58static unsigned char swapbits(unsigned char val) 59{ 60 int bit; 61 unsigned char res = 0; 62 for (bit = 0; bit < 8; bit++) { 63 res <<= 1; 64 res |= val & 1; 65 val >>= 1; 66 } 67 return res; 68} 69 70int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg, 71 unsigned char val) 72{ 73 int err; 74 unsigned char buf[2]; 75 76 buf[0] = reg & 0x7f; 77 buf[1] = val; 78 if ((err = snd_i2c_sendbytes(device, buf, 2)) != 2) { 79 snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x " 80 "to CS8427 (%i)\n", buf[0], buf[1], err); 81 return err < 0 ? err : -EIO; 82 } 83 return 0; 84} 85 86EXPORT_SYMBOL(snd_cs8427_reg_write); 87 88static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg) 89{ 90 int err; 91 unsigned char buf; 92 93 if ((err = snd_i2c_sendbytes(device, ®, 1)) != 1) { 94 snd_printk(KERN_ERR "unable to send register 0x%x byte " 95 "to CS8427\n", reg); 96 return err < 0 ? err : -EIO; 97 } 98 if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) { 99 snd_printk(KERN_ERR "unable to read register 0x%x byte " 100 "from CS8427\n", reg); 101 return err < 0 ? err : -EIO; 102 } 103 return buf; 104} 105 106static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata) 107{ 108 struct cs8427 *chip = device->private_data; 109 int err; 110 111 udata = udata ? CS8427_BSEL : 0; 112 if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) { 113 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL; 114 chip->regmap[CS8427_REG_CSDATABUF] |= udata; 115 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF, 116 chip->regmap[CS8427_REG_CSDATABUF]); 117 if (err < 0) 118 return err; 119 } 120 return 0; 121} 122 123static int snd_cs8427_send_corudata(struct snd_i2c_device *device, 124 int udata, 125 unsigned char *ndata, 126 int count) 127{ 128 struct cs8427 *chip = device->private_data; 129 char *hw_data = udata ? 130 chip->playback.hw_udata : chip->playback.hw_status; 131 char data[32]; 132 int err, idx; 133 134 if (!memcmp(hw_data, ndata, count)) 135 return 0; 136 if ((err = snd_cs8427_select_corudata(device, udata)) < 0) 137 return err; 138 memcpy(hw_data, ndata, count); 139 if (udata) { 140 memset(data, 0, sizeof(data)); 141 if (memcmp(hw_data, data, count) == 0) { 142 chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK; 143 chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | 144 CS8427_EFTUI; 145 err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF, 146 chip->regmap[CS8427_REG_UDATABUF]); 147 return err < 0 ? err : 0; 148 } 149 } 150 data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF; 151 for (idx = 0; idx < count; idx++) 152 data[idx + 1] = swapbits(ndata[idx]); 153 if (snd_i2c_sendbytes(device, data, count + 1) != count + 1) 154 return -EIO; 155 return 1; 156} 157 158static void snd_cs8427_free(struct snd_i2c_device *device) 159{ 160 kfree(device->private_data); 161} 162 163int snd_cs8427_create(struct snd_i2c_bus *bus, 164 unsigned char addr, 165 unsigned int reset_timeout, 166 struct snd_i2c_device **r_cs8427) 167{ 168 static unsigned char initvals1[] = { 169 CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC, 170 /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, 171 TCBL=output */ 172 CS8427_SWCLK | CS8427_TCBLDIR, 173 /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, 174 normal stereo operation */ 175 0x00, 176 /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, 177 Rx=>serial */ 178 CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER, 179 CS8427_RXDILRCK, 180 /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, 181 24-bit, 64*Fsi */ 182 CS8427_SIDEL | CS8427_SILRPOL, 183 /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format 184 = I2S, 24-bit, 64*Fsi */ 185 CS8427_SODEL | CS8427_SOLRPOL, 186 }; 187 static unsigned char initvals2[] = { 188 CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC, 189 /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, 190 biphase, parity status bits */ 191 /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/ 192 0xff, /* set everything */ 193 /* CS8427_REG_CSDATABUF: 194 Registers 32-55 window to CS buffer 195 Inhibit D->E transfers from overwriting first 5 bytes of CS data. 196 Inhibit D->E transfers (all) of CS data. 197 Allow E->F transfer of CS data. 198 One byte mode; both A/B channels get same written CB data. 199 A channel info is output to chip's EMPH* pin. */ 200 CS8427_CBMR | CS8427_DETCI, 201 /* CS8427_REG_UDATABUF: 202 Use internal buffer to transmit User (U) data. 203 Chip's U pin is an output. 204 Transmit all O's for user data. 205 Inhibit D->E transfers. 206 Inhibit E->F transfers. */ 207 CS8427_UD | CS8427_EFTUI | CS8427_DETUI, 208 }; 209 int err; 210 struct cs8427 *chip; 211 struct snd_i2c_device *device; 212 unsigned char buf[24]; 213 214 if ((err = snd_i2c_device_create(bus, "CS8427", 215 CS8427_ADDR | (addr & 7), 216 &device)) < 0) 217 return err; 218 chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL); 219 if (chip == NULL) { 220 snd_i2c_device_free(device); 221 return -ENOMEM; 222 } 223 device->private_free = snd_cs8427_free; 224 225 snd_i2c_lock(bus); 226 err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER); 227 if (err != CS8427_VER8427A) { 228 snd_i2c_unlock(bus); 229 snd_printk(KERN_ERR "unable to find CS8427 signature " 230 "(expected 0x%x, read 0x%x),\n", 231 CS8427_VER8427A, err); 232 snd_printk(KERN_ERR " initialization is not completed\n"); 233 return -EFAULT; 234 } 235 /* turn off run bit while making changes to configuration */ 236 err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00); 237 if (err < 0) 238 goto __fail; 239 /* send initial values */ 240 memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6); 241 if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) { 242 err = err < 0 ? err : -EIO; 243 goto __fail; 244 } 245 /* Turn off CS8427 interrupt stuff that is not used in hardware */ 246 memset(buf, 0, 7); 247 /* from address 9 to 15 */ 248 buf[0] = 9; /* register */ 249 if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7) 250 goto __fail; 251 /* send transfer initialization sequence */ 252 memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3); 253 if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) { 254 err = err < 0 ? err : -EIO; 255 goto __fail; 256 } 257 /* write default channel status bytes */ 258 buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0)); 259 buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8)); 260 buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16)); 261 buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24)); 262 memset(buf + 4, 0, 24 - 4); 263 if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0) 264 goto __fail; 265 memcpy(chip->playback.def_status, buf, 24); 266 memcpy(chip->playback.pcm_status, buf, 24); 267 snd_i2c_unlock(bus); 268 269 /* turn on run bit and rock'n'roll */ 270 if (reset_timeout < 1) 271 reset_timeout = 1; 272 chip->reset_timeout = reset_timeout; 273 snd_cs8427_reset(device); 274 275 276 if (r_cs8427) 277 *r_cs8427 = device; 278 return 0; 279 280 __fail: 281 snd_i2c_unlock(bus); 282 snd_i2c_device_free(device); 283 return err < 0 ? err : -EIO; 284} 285 286EXPORT_SYMBOL(snd_cs8427_create); 287 288static void snd_cs8427_reset(struct snd_i2c_device *cs8427) 289{ 290 struct cs8427 *chip; 291 unsigned long end_time; 292 int data, aes3input = 0; 293 294 snd_assert(cs8427, return); 295 chip = cs8427->private_data; 296 snd_i2c_lock(cs8427->bus); 297 if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) == 298 CS8427_RXDAES3INPUT) /* AES3 bit is set */ 299 aes3input = 1; 300 chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK); 301 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 302 chip->regmap[CS8427_REG_CLOCKSOURCE]); 303 udelay(200); 304 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK; 305 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 306 chip->regmap[CS8427_REG_CLOCKSOURCE]); 307 udelay(200); 308 snd_i2c_unlock(cs8427->bus); 309 end_time = jiffies + chip->reset_timeout; 310 while (time_after_eq(end_time, jiffies)) { 311 snd_i2c_lock(cs8427->bus); 312 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS); 313 snd_i2c_unlock(cs8427->bus); 314 if (!(data & CS8427_UNLOCK)) 315 break; 316 schedule_timeout_uninterruptible(1); 317 } 318 snd_i2c_lock(cs8427->bus); 319 chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK; 320 if (aes3input) 321 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT; 322 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 323 chip->regmap[CS8427_REG_CLOCKSOURCE]); 324 snd_i2c_unlock(cs8427->bus); 325} 326 327static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol, 328 struct snd_ctl_elem_info *uinfo) 329{ 330 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 331 uinfo->count = 1; 332 uinfo->value.integer.min = 0; 333 uinfo->value.integer.max = 255; 334 return 0; 335} 336 337static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol, 338 struct snd_ctl_elem_value *ucontrol) 339{ 340 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 341 int data; 342 343 snd_i2c_lock(device->bus); 344 data = snd_cs8427_reg_read(device, kcontrol->private_value); 345 snd_i2c_unlock(device->bus); 346 if (data < 0) 347 return data; 348 ucontrol->value.integer.value[0] = data; 349 return 0; 350} 351 352static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol, 353 struct snd_ctl_elem_info *uinfo) 354{ 355 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 356 uinfo->count = 10; 357 return 0; 358} 359 360static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol, 361 struct snd_ctl_elem_value *ucontrol) 362{ 363 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 364 unsigned char reg = CS8427_REG_QSUBCODE; 365 int err; 366 367 snd_i2c_lock(device->bus); 368 if ((err = snd_i2c_sendbytes(device, ®, 1)) != 1) { 369 snd_printk(KERN_ERR "unable to send register 0x%x byte " 370 "to CS8427\n", reg); 371 snd_i2c_unlock(device->bus); 372 return err < 0 ? err : -EIO; 373 } 374 err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10); 375 if (err != 10) { 376 snd_printk(KERN_ERR "unable to read Q-subcode bytes " 377 "from CS8427\n"); 378 snd_i2c_unlock(device->bus); 379 return err < 0 ? err : -EIO; 380 } 381 snd_i2c_unlock(device->bus); 382 return 0; 383} 384 385static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol, 386 struct snd_ctl_elem_info *uinfo) 387{ 388 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 389 uinfo->count = 1; 390 return 0; 391} 392 393static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol, 394 struct snd_ctl_elem_value *ucontrol) 395{ 396 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 397 struct cs8427 *chip = device->private_data; 398 399 snd_i2c_lock(device->bus); 400 memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24); 401 snd_i2c_unlock(device->bus); 402 return 0; 403} 404 405static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol, 406 struct snd_ctl_elem_value *ucontrol) 407{ 408 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 409 struct cs8427 *chip = device->private_data; 410 unsigned char *status = kcontrol->private_value ? 411 chip->playback.pcm_status : chip->playback.def_status; 412 struct snd_pcm_runtime *runtime = chip->playback.substream ? 413 chip->playback.substream->runtime : NULL; 414 int err, change; 415 416 snd_i2c_lock(device->bus); 417 change = memcmp(ucontrol->value.iec958.status, status, 24) != 0; 418 memcpy(status, ucontrol->value.iec958.status, 24); 419 if (change && (kcontrol->private_value ? 420 runtime != NULL : runtime == NULL)) { 421 err = snd_cs8427_send_corudata(device, 0, status, 24); 422 if (err < 0) 423 change = err; 424 } 425 snd_i2c_unlock(device->bus); 426 return change; 427} 428 429static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol, 430 struct snd_ctl_elem_info *uinfo) 431{ 432 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 433 uinfo->count = 1; 434 return 0; 435} 436 437static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol, 438 struct snd_ctl_elem_value *ucontrol) 439{ 440 memset(ucontrol->value.iec958.status, 0xff, 24); 441 return 0; 442} 443 444static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = { 445{ 446 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 447 .info = snd_cs8427_in_status_info, 448 .name = "IEC958 CS8427 Input Status", 449 .access = (SNDRV_CTL_ELEM_ACCESS_READ | 450 SNDRV_CTL_ELEM_ACCESS_VOLATILE), 451 .get = snd_cs8427_in_status_get, 452 .private_value = 15, 453}, 454{ 455 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 456 .info = snd_cs8427_in_status_info, 457 .name = "IEC958 CS8427 Error Status", 458 .access = (SNDRV_CTL_ELEM_ACCESS_READ | 459 SNDRV_CTL_ELEM_ACCESS_VOLATILE), 460 .get = snd_cs8427_in_status_get, 461 .private_value = 16, 462}, 463{ 464 .access = SNDRV_CTL_ELEM_ACCESS_READ, 465 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 466 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), 467 .info = snd_cs8427_spdif_mask_info, 468 .get = snd_cs8427_spdif_mask_get, 469}, 470{ 471 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 472 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), 473 .info = snd_cs8427_spdif_info, 474 .get = snd_cs8427_spdif_get, 475 .put = snd_cs8427_spdif_put, 476 .private_value = 0 477}, 478{ 479 .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE | 480 SNDRV_CTL_ELEM_ACCESS_INACTIVE), 481 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 482 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM), 483 .info = snd_cs8427_spdif_info, 484 .get = snd_cs8427_spdif_get, 485 .put = snd_cs8427_spdif_put, 486 .private_value = 1 487}, 488{ 489 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 490 .info = snd_cs8427_qsubcode_info, 491 .name = "IEC958 Q-subcode Capture Default", 492 .access = (SNDRV_CTL_ELEM_ACCESS_READ | 493 SNDRV_CTL_ELEM_ACCESS_VOLATILE), 494 .get = snd_cs8427_qsubcode_get 495}}; 496 497int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427, 498 struct snd_pcm_substream *play_substream, 499 struct snd_pcm_substream *cap_substream) 500{ 501 struct cs8427 *chip = cs8427->private_data; 502 struct snd_kcontrol *kctl; 503 unsigned int idx; 504 int err; 505 506 snd_assert(play_substream && cap_substream, return -EINVAL); 507 for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) { 508 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427); 509 if (kctl == NULL) 510 return -ENOMEM; 511 kctl->id.device = play_substream->pcm->device; 512 kctl->id.subdevice = play_substream->number; 513 err = snd_ctl_add(cs8427->bus->card, kctl); 514 if (err < 0) 515 return err; 516 if (! strcmp(kctl->id.name, 517 SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM))) 518 chip->playback.pcm_ctl = kctl; 519 } 520 521 chip->playback.substream = play_substream; 522 chip->capture.substream = cap_substream; 523 snd_assert(chip->playback.pcm_ctl, return -EIO); 524 return 0; 525} 526 527EXPORT_SYMBOL(snd_cs8427_iec958_build); 528 529int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active) 530{ 531 struct cs8427 *chip; 532 533 snd_assert(cs8427, return -ENXIO); 534 chip = cs8427->private_data; 535 if (active) 536 memcpy(chip->playback.pcm_status, 537 chip->playback.def_status, 24); 538 chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 539 snd_ctl_notify(cs8427->bus->card, 540 SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO, 541 &chip->playback.pcm_ctl->id); 542 return 0; 543} 544 545EXPORT_SYMBOL(snd_cs8427_iec958_active); 546 547int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate) 548{ 549 struct cs8427 *chip; 550 char *status; 551 int err, reset; 552 553 snd_assert(cs8427, return -ENXIO); 554 chip = cs8427->private_data; 555 status = chip->playback.pcm_status; 556 snd_i2c_lock(cs8427->bus); 557 if (status[0] & IEC958_AES0_PROFESSIONAL) { 558 status[0] &= ~IEC958_AES0_PRO_FS; 559 switch (rate) { 560 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break; 561 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break; 562 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break; 563 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break; 564 } 565 } else { 566 status[3] &= ~IEC958_AES3_CON_FS; 567 switch (rate) { 568 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break; 569 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break; 570 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break; 571 } 572 } 573 err = snd_cs8427_send_corudata(cs8427, 0, status, 24); 574 if (err > 0) 575 snd_ctl_notify(cs8427->bus->card, 576 SNDRV_CTL_EVENT_MASK_VALUE, 577 &chip->playback.pcm_ctl->id); 578 reset = chip->rate != rate; 579 chip->rate = rate; 580 snd_i2c_unlock(cs8427->bus); 581 if (reset) 582 snd_cs8427_reset(cs8427); 583 return err < 0 ? err : 0; 584} 585 586EXPORT_SYMBOL(snd_cs8427_iec958_pcm); 587 588static int __init alsa_cs8427_module_init(void) 589{ 590 return 0; 591} 592 593static void __exit alsa_cs8427_module_exit(void) 594{ 595} 596 597module_init(alsa_cs8427_module_init) 598module_exit(alsa_cs8427_module_exit) 599