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 33 static void snd_cs8427_reset(struct snd_i2c_device *cs8427); 34 35 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 36 MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic"); 37 MODULE_LICENSE("GPL"); 38 39 #define CS8427_ADDR (0x20>>1) /* fixed address */ 40 41 struct 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 50 struct 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 58 static 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 70 int 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 to CS8427 (%i)\n", buf[0], buf[1], err); 80 return err < 0 ? err : -EIO; 81 } 82 return 0; 83 } 84 85 static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg) 86 { 87 int err; 88 unsigned char buf; 89 90 if ((err = snd_i2c_sendbytes(device, ®, 1)) != 1) { 91 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg); 92 return err < 0 ? err : -EIO; 93 } 94 if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) { 95 snd_printk(KERN_ERR "unable to read register 0x%x byte from CS8427\n", reg); 96 return err < 0 ? err : -EIO; 97 } 98 return buf; 99 } 100 101 static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata) 102 { 103 struct cs8427 *chip = device->private_data; 104 int err; 105 106 udata = udata ? CS8427_BSEL : 0; 107 if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) { 108 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL; 109 chip->regmap[CS8427_REG_CSDATABUF] |= udata; 110 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF, 111 chip->regmap[CS8427_REG_CSDATABUF]); 112 if (err < 0) 113 return err; 114 } 115 return 0; 116 } 117 118 static int snd_cs8427_send_corudata(struct snd_i2c_device *device, 119 int udata, 120 unsigned char *ndata, 121 int count) 122 { 123 struct cs8427 *chip = device->private_data; 124 char *hw_data = udata ? chip->playback.hw_udata : chip->playback.hw_status; 125 char data[32]; 126 int err, idx; 127 128 if (!memcmp(hw_data, ndata, count)) 129 return 0; 130 if ((err = snd_cs8427_select_corudata(device, udata)) < 0) 131 return err; 132 memcpy(hw_data, ndata, count); 133 if (udata) { 134 memset(data, 0, sizeof(data)); 135 if (memcmp(hw_data, data, count) == 0) { 136 chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK; 137 chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | CS8427_EFTUI; 138 if ((err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF, 139 chip->regmap[CS8427_REG_UDATABUF])) < 0) 140 return err; 141 return 0; 142 } 143 } 144 data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF; 145 for (idx = 0; idx < count; idx++) 146 data[idx + 1] = swapbits(ndata[idx]); 147 if (snd_i2c_sendbytes(device, data, count + 1) != count + 1) 148 return -EIO; 149 return 1; 150 } 151 152 static void snd_cs8427_free(struct snd_i2c_device *device) 153 { 154 kfree(device->private_data); 155 } 156 157 int snd_cs8427_create(struct snd_i2c_bus *bus, 158 unsigned char addr, 159 unsigned int reset_timeout, 160 struct snd_i2c_device **r_cs8427) 161 { 162 static unsigned char initvals1[] = { 163 CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC, 164 /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, TCBL=output */ 165 CS8427_SWCLK | CS8427_TCBLDIR, 166 /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, normal stereo operation */ 167 0x00, 168 /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, Rx=>serial */ 169 CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER, 170 /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs, output time base = OMCK, input time base = 171 recovered input clock, recovered input clock source is ILRCK changed to AES3INPUT (workaround, see snd_cs8427_reset) */ 172 CS8427_RXDILRCK, 173 /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, 24-bit, 64*Fsi */ 174 CS8427_SIDEL | CS8427_SILRPOL, 175 /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format = I2S, 24-bit, 64*Fsi */ 176 CS8427_SODEL | CS8427_SOLRPOL, 177 }; 178 static unsigned char initvals2[] = { 179 CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC, 180 /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, biphase, parity status bits */ 181 /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR, */ 182 0xff, /* set everything */ 183 /* CS8427_REG_CSDATABUF: 184 Registers 32-55 window to CS buffer 185 Inhibit D->E transfers from overwriting first 5 bytes of CS data. 186 Inhibit D->E transfers (all) of CS data. 187 Allow E->F transfer of CS data. 188 One byte mode; both A/B channels get same written CB data. 189 A channel info is output to chip's EMPH* pin. */ 190 CS8427_CBMR | CS8427_DETCI, 191 /* CS8427_REG_UDATABUF: 192 Use internal buffer to transmit User (U) data. 193 Chip's U pin is an output. 194 Transmit all O's for user data. 195 Inhibit D->E transfers. 196 Inhibit E->F transfers. */ 197 CS8427_UD | CS8427_EFTUI | CS8427_DETUI, 198 }; 199 int err; 200 struct cs8427 *chip; 201 struct snd_i2c_device *device; 202 unsigned char buf[24]; 203 204 if ((err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7), 205 &device)) < 0) 206 return err; 207 chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL); 208 if (chip == NULL) { 209 snd_i2c_device_free(device); 210 return -ENOMEM; 211 } 212 device->private_free = snd_cs8427_free; 213 214 snd_i2c_lock(bus); 215 if ((err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER)) != 216 CS8427_VER8427A) { 217 snd_i2c_unlock(bus); 218 snd_printk(KERN_ERR "unable to find CS8427 signature " 219 "(expected 0x%x, read 0x%x),\n", 220 CS8427_VER8427A, err); 221 snd_printk(KERN_ERR " initialization is not completed\n"); 222 return -EFAULT; 223 } 224 /* turn off run bit while making changes to configuration */ 225 if ((err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00)) < 0) 226 goto __fail; 227 /* send initial values */ 228 memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6); 229 if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) { 230 err = err < 0 ? err : -EIO; 231 goto __fail; 232 } 233 /* Turn off CS8427 interrupt stuff that is not used in hardware */ 234 memset(buf, 0, 7); 235 /* from address 9 to 15 */ 236 buf[0] = 9; /* register */ 237 if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7) 238 goto __fail; 239 /* send transfer initialization sequence */ 240 memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3); 241 if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) { 242 err = err < 0 ? err : -EIO; 243 goto __fail; 244 } 245 /* write default channel status bytes */ 246 buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0)); 247 buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8)); 248 buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16)); 249 buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24)); 250 memset(buf + 4, 0, 24 - 4); 251 if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0) 252 goto __fail; 253 memcpy(chip->playback.def_status, buf, 24); 254 memcpy(chip->playback.pcm_status, buf, 24); 255 snd_i2c_unlock(bus); 256 257 /* turn on run bit and rock'n'roll */ 258 if (reset_timeout < 1) 259 reset_timeout = 1; 260 chip->reset_timeout = reset_timeout; 261 snd_cs8427_reset(device); 262 263 #if 0 // it's nice for read tests 264 { 265 char buf[128]; 266 int xx; 267 buf[0] = 0x81; 268 snd_i2c_sendbytes(device, buf, 1); 269 snd_i2c_readbytes(device, buf, 127); 270 for (xx = 0; xx < 127; xx++) 271 printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]); 272 } 273 #endif 274 275 if (r_cs8427) 276 *r_cs8427 = device; 277 return 0; 278 279 __fail: 280 snd_i2c_unlock(bus); 281 snd_i2c_device_free(device); 282 return err < 0 ? err : -EIO; 283 } 284 285 /* 286 * Reset the chip using run bit, also lock PLL using ILRCK and 287 * put back AES3INPUT. This workaround is described in latest 288 * CS8427 datasheet, otherwise TXDSERIAL will not work. 289 */ 290 static void snd_cs8427_reset(struct snd_i2c_device *cs8427) 291 { 292 struct cs8427 *chip; 293 unsigned long end_time; 294 int data; 295 296 snd_assert(cs8427, return); 297 chip = cs8427->private_data; 298 snd_i2c_lock(cs8427->bus); 299 chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK); 300 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 301 chip->regmap[CS8427_REG_CLOCKSOURCE]); 302 udelay(200); 303 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK; 304 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 305 chip->regmap[CS8427_REG_CLOCKSOURCE]); 306 udelay(200); 307 snd_i2c_unlock(cs8427->bus); 308 end_time = jiffies + chip->reset_timeout; 309 while (time_after_eq(end_time, jiffies)) { 310 snd_i2c_lock(cs8427->bus); 311 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS); 312 snd_i2c_unlock(cs8427->bus); 313 if (!(data & CS8427_UNLOCK)) 314 break; 315 schedule_timeout_uninterruptible(1); 316 } 317 snd_i2c_lock(cs8427->bus); 318 chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK; 319 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT; 320 snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, 321 chip->regmap[CS8427_REG_CLOCKSOURCE]); 322 snd_i2c_unlock(cs8427->bus); 323 } 324 325 static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol, 326 struct snd_ctl_elem_info *uinfo) 327 { 328 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 329 uinfo->count = 1; 330 uinfo->value.integer.min = 0; 331 uinfo->value.integer.max = 255; 332 return 0; 333 } 334 335 static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol, 336 struct snd_ctl_elem_value *ucontrol) 337 { 338 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 339 int data; 340 341 snd_i2c_lock(device->bus); 342 data = snd_cs8427_reg_read(device, kcontrol->private_value); 343 snd_i2c_unlock(device->bus); 344 if (data < 0) 345 return data; 346 ucontrol->value.integer.value[0] = data; 347 return 0; 348 } 349 350 static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol, 351 struct snd_ctl_elem_info *uinfo) 352 { 353 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 354 uinfo->count = 10; 355 return 0; 356 } 357 358 static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol, 359 struct snd_ctl_elem_value *ucontrol) 360 { 361 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 362 unsigned char reg = CS8427_REG_QSUBCODE; 363 int err; 364 365 snd_i2c_lock(device->bus); 366 if ((err = snd_i2c_sendbytes(device, ®, 1)) != 1) { 367 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg); 368 snd_i2c_unlock(device->bus); 369 return err < 0 ? err : -EIO; 370 } 371 if ((err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10)) != 10) { 372 snd_printk(KERN_ERR "unable to read Q-subcode bytes from CS8427\n"); 373 snd_i2c_unlock(device->bus); 374 return err < 0 ? err : -EIO; 375 } 376 snd_i2c_unlock(device->bus); 377 return 0; 378 } 379 380 static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 381 { 382 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 383 uinfo->count = 1; 384 return 0; 385 } 386 387 static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol, 388 struct snd_ctl_elem_value *ucontrol) 389 { 390 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 391 struct cs8427 *chip = device->private_data; 392 393 snd_i2c_lock(device->bus); 394 memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24); 395 snd_i2c_unlock(device->bus); 396 return 0; 397 } 398 399 static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol, 400 struct snd_ctl_elem_value *ucontrol) 401 { 402 struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); 403 struct cs8427 *chip = device->private_data; 404 unsigned char *status = kcontrol->private_value ? 405 chip->playback.pcm_status : chip->playback.def_status; 406 struct snd_pcm_runtime *runtime = chip->playback.substream ? 407 chip->playback.substream->runtime : NULL; 408 int err, change; 409 410 snd_i2c_lock(device->bus); 411 change = memcmp(ucontrol->value.iec958.status, status, 24) != 0; 412 memcpy(status, ucontrol->value.iec958.status, 24); 413 if (change && (kcontrol->private_value ? runtime != NULL : runtime == NULL)) { 414 err = snd_cs8427_send_corudata(device, 0, status, 24); 415 if (err < 0) 416 change = err; 417 } 418 snd_i2c_unlock(device->bus); 419 return change; 420 } 421 422 static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol, 423 struct snd_ctl_elem_info *uinfo) 424 { 425 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 426 uinfo->count = 1; 427 return 0; 428 } 429 430 static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol, 431 struct snd_ctl_elem_value *ucontrol) 432 { 433 memset(ucontrol->value.iec958.status, 0xff, 24); 434 return 0; 435 } 436 437 static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = { 438 { 439 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 440 .info = snd_cs8427_in_status_info, 441 .name = "IEC958 CS8427 Input Status", 442 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 443 .get = snd_cs8427_in_status_get, 444 .private_value = 15, 445 }, 446 { 447 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 448 .info = snd_cs8427_in_status_info, 449 .name = "IEC958 CS8427 Error Status", 450 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 451 .get = snd_cs8427_in_status_get, 452 .private_value = 16, 453 }, 454 { 455 .access = SNDRV_CTL_ELEM_ACCESS_READ, 456 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 457 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), 458 .info = snd_cs8427_spdif_mask_info, 459 .get = snd_cs8427_spdif_mask_get, 460 }, 461 { 462 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 463 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT), 464 .info = snd_cs8427_spdif_info, 465 .get = snd_cs8427_spdif_get, 466 .put = snd_cs8427_spdif_put, 467 .private_value = 0 468 }, 469 { 470 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE, 471 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 472 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM), 473 .info = snd_cs8427_spdif_info, 474 .get = snd_cs8427_spdif_get, 475 .put = snd_cs8427_spdif_put, 476 .private_value = 1 477 }, 478 { 479 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 480 .info = snd_cs8427_qsubcode_info, 481 .name = "IEC958 Q-subcode Capture Default", 482 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 483 .get = snd_cs8427_qsubcode_get 484 }}; 485 486 int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427, 487 struct snd_pcm_substream *play_substream, 488 struct snd_pcm_substream *cap_substream) 489 { 490 struct cs8427 *chip = cs8427->private_data; 491 struct snd_kcontrol *kctl; 492 unsigned int idx; 493 int err; 494 495 snd_assert(play_substream && cap_substream, return -EINVAL); 496 for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) { 497 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427); 498 if (kctl == NULL) 499 return -ENOMEM; 500 kctl->id.device = play_substream->pcm->device; 501 kctl->id.subdevice = play_substream->number; 502 err = snd_ctl_add(cs8427->bus->card, kctl); 503 if (err < 0) 504 return err; 505 if (!strcmp(kctl->id.name, SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM))) 506 chip->playback.pcm_ctl = kctl; 507 } 508 509 chip->playback.substream = play_substream; 510 chip->capture.substream = cap_substream; 511 snd_assert(chip->playback.pcm_ctl, return -EIO); 512 return 0; 513 } 514 515 int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active) 516 { 517 struct cs8427 *chip; 518 519 snd_assert(cs8427, return -ENXIO); 520 chip = cs8427->private_data; 521 if (active) 522 memcpy(chip->playback.pcm_status, chip->playback.def_status, 24); 523 chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 524 snd_ctl_notify(cs8427->bus->card, SNDRV_CTL_EVENT_MASK_VALUE | 525 SNDRV_CTL_EVENT_MASK_INFO, &chip->playback.pcm_ctl->id); 526 return 0; 527 } 528 529 int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate) 530 { 531 struct cs8427 *chip; 532 char *status; 533 int err, reset; 534 535 snd_assert(cs8427, return -ENXIO); 536 chip = cs8427->private_data; 537 status = chip->playback.pcm_status; 538 snd_i2c_lock(cs8427->bus); 539 if (status[0] & IEC958_AES0_PROFESSIONAL) { 540 status[0] &= ~IEC958_AES0_PRO_FS; 541 switch (rate) { 542 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break; 543 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break; 544 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break; 545 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break; 546 } 547 } else { 548 status[3] &= ~IEC958_AES3_CON_FS; 549 switch (rate) { 550 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break; 551 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break; 552 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break; 553 } 554 } 555 err = snd_cs8427_send_corudata(cs8427, 0, status, 24); 556 if (err > 0) 557 snd_ctl_notify(cs8427->bus->card, 558 SNDRV_CTL_EVENT_MASK_VALUE, 559 &chip->playback.pcm_ctl->id); 560 reset = chip->rate != rate; 561 chip->rate = rate; 562 snd_i2c_unlock(cs8427->bus); 563 if (reset) 564 snd_cs8427_reset(cs8427); 565 return err < 0 ? err : 0; 566 } 567 568 static int __init alsa_cs8427_module_init(void) 569 { 570 return 0; 571 } 572 573 static void __exit alsa_cs8427_module_exit(void) 574 { 575 } 576 577 module_init(alsa_cs8427_module_init) 578 module_exit(alsa_cs8427_module_exit) 579 580 EXPORT_SYMBOL(snd_cs8427_create); 581 EXPORT_SYMBOL(snd_cs8427_reset); 582 EXPORT_SYMBOL(snd_cs8427_reg_write); 583 EXPORT_SYMBOL(snd_cs8427_iec958_build); 584 EXPORT_SYMBOL(snd_cs8427_iec958_active); 585 EXPORT_SYMBOL(snd_cs8427_iec958_pcm); 586