1 /* 2 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC 3 * 4 * Copyright (C) 2006-2007 Atmel Norway 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 as published by 8 * the Free Software Foundation. 9 */ 10 11 /*#define DEBUG*/ 12 13 #include <linux/clk.h> 14 #include <linux/err.h> 15 #include <linux/delay.h> 16 #include <linux/device.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/init.h> 19 #include <linux/interrupt.h> 20 #include <linux/module.h> 21 #include <linux/mutex.h> 22 #include <linux/platform_device.h> 23 #include <linux/io.h> 24 25 #include <sound/initval.h> 26 #include <sound/control.h> 27 #include <sound/core.h> 28 #include <sound/pcm.h> 29 30 #include <linux/atmel-ssc.h> 31 32 #include <linux/spi/spi.h> 33 #include <linux/spi/at73c213.h> 34 35 #include "at73c213.h" 36 37 #define BITRATE_MIN 8000 /* Hardware limit? */ 38 #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE 39 #define BITRATE_MAX 50000 /* Hardware limit. */ 40 41 /* Initial (hardware reset) AT73C213 register values. */ 42 static u8 snd_at73c213_original_image[18] = 43 { 44 0x00, /* 00 - CTRL */ 45 0x05, /* 01 - LLIG */ 46 0x05, /* 02 - RLIG */ 47 0x08, /* 03 - LPMG */ 48 0x08, /* 04 - RPMG */ 49 0x00, /* 05 - LLOG */ 50 0x00, /* 06 - RLOG */ 51 0x22, /* 07 - OLC */ 52 0x09, /* 08 - MC */ 53 0x00, /* 09 - CSFC */ 54 0x00, /* 0A - MISC */ 55 0x00, /* 0B - */ 56 0x00, /* 0C - PRECH */ 57 0x05, /* 0D - AUXG */ 58 0x00, /* 0E - */ 59 0x00, /* 0F - */ 60 0x00, /* 10 - RST */ 61 0x00, /* 11 - PA_CTRL */ 62 }; 63 64 struct snd_at73c213 { 65 struct snd_card *card; 66 struct snd_pcm *pcm; 67 struct snd_pcm_substream *substream; 68 struct at73c213_board_info *board; 69 int irq; 70 int period; 71 unsigned long bitrate; 72 struct clk *bitclk; 73 struct ssc_device *ssc; 74 struct spi_device *spi; 75 u8 spi_wbuffer[2]; 76 u8 spi_rbuffer[2]; 77 /* Image of the SPI registers in AT73C213. */ 78 u8 reg_image[18]; 79 /* Protect SSC registers against concurrent access. */ 80 spinlock_t lock; 81 /* Protect mixer registers against concurrent access. */ 82 struct mutex mixer_lock; 83 }; 84 85 #define get_chip(card) ((struct snd_at73c213 *)card->private_data) 86 87 static int 88 snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val) 89 { 90 struct spi_message msg; 91 struct spi_transfer msg_xfer = { 92 .len = 2, 93 .cs_change = 0, 94 }; 95 int retval; 96 97 spi_message_init(&msg); 98 99 chip->spi_wbuffer[0] = reg; 100 chip->spi_wbuffer[1] = val; 101 102 msg_xfer.tx_buf = chip->spi_wbuffer; 103 msg_xfer.rx_buf = chip->spi_rbuffer; 104 spi_message_add_tail(&msg_xfer, &msg); 105 106 retval = spi_sync(chip->spi, &msg); 107 108 if (!retval) 109 chip->reg_image[reg] = val; 110 111 return retval; 112 } 113 114 static struct snd_pcm_hardware snd_at73c213_playback_hw = { 115 .info = SNDRV_PCM_INFO_INTERLEAVED | 116 SNDRV_PCM_INFO_BLOCK_TRANSFER, 117 .formats = SNDRV_PCM_FMTBIT_S16_BE, 118 .rates = SNDRV_PCM_RATE_CONTINUOUS, 119 .rate_min = 8000, /* Replaced by chip->bitrate later. */ 120 .rate_max = 50000, /* Replaced by chip->bitrate later. */ 121 .channels_min = 1, 122 .channels_max = 2, 123 .buffer_bytes_max = 64 * 1024 - 1, 124 .period_bytes_min = 512, 125 .period_bytes_max = 64 * 1024 - 1, 126 .periods_min = 4, 127 .periods_max = 1024, 128 }; 129 130 /* 131 * Calculate and set bitrate and divisions. 132 */ 133 static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) 134 { 135 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); 136 unsigned long dac_rate_new, ssc_div; 137 int status; 138 unsigned long ssc_div_max, ssc_div_min; 139 int max_tries; 140 141 /* 142 * We connect two clocks here, picking divisors so the I2S clocks 143 * out data at the same rate the DAC clocks it in ... and as close 144 * as practical to the desired target rate. 145 * 146 * The DAC master clock (MCLK) is programmable, and is either 256 147 * or (not here) 384 times the I2S output clock (BCLK). 148 */ 149 150 /* SSC clock / (bitrate * stereo * 16-bit). */ 151 ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); 152 ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); 153 ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); 154 max_tries = (ssc_div_max - ssc_div_min) / 2; 155 156 if (max_tries < 1) 157 max_tries = 1; 158 159 /* ssc_div must be a power of 2. */ 160 ssc_div = (ssc_div + 1) & ~1UL; 161 162 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { 163 ssc_div -= 2; 164 if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) 165 return -ENXIO; 166 } 167 168 /* Search for a possible bitrate. */ 169 do { 170 /* SSC clock / (ssc divider * 16-bit * stereo). */ 171 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) 172 return -ENXIO; 173 174 /* 256 / (2 * 16) = 8 */ 175 dac_rate_new = 8 * (ssc_rate / ssc_div); 176 177 status = clk_round_rate(chip->board->dac_clk, dac_rate_new); 178 if (status < 0) 179 return status; 180 181 /* Ignore difference smaller than 256 Hz. */ 182 if ((status/256) == (dac_rate_new/256)) 183 goto set_rate; 184 185 ssc_div += 2; 186 } while (--max_tries); 187 188 /* Not able to find a valid bitrate. */ 189 return -ENXIO; 190 191 set_rate: 192 status = clk_set_rate(chip->board->dac_clk, status); 193 if (status < 0) 194 return status; 195 196 /* Set divider in SSC device. */ 197 ssc_writel(chip->ssc->regs, CMR, ssc_div/2); 198 199 /* SSC clock / (ssc divider * 16-bit * stereo). */ 200 chip->bitrate = ssc_rate / (ssc_div * 16 * 2); 201 202 dev_info(&chip->spi->dev, 203 "at73c213: supported bitrate is %lu (%lu divider)\n", 204 chip->bitrate, ssc_div); 205 206 return 0; 207 } 208 209 static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) 210 { 211 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 212 struct snd_pcm_runtime *runtime = substream->runtime; 213 int err; 214 215 /* ensure buffer_size is a multiple of period_size */ 216 err = snd_pcm_hw_constraint_integer(runtime, 217 SNDRV_PCM_HW_PARAM_PERIODS); 218 if (err < 0) 219 return err; 220 snd_at73c213_playback_hw.rate_min = chip->bitrate; 221 snd_at73c213_playback_hw.rate_max = chip->bitrate; 222 runtime->hw = snd_at73c213_playback_hw; 223 chip->substream = substream; 224 225 return 0; 226 } 227 228 static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) 229 { 230 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 231 chip->substream = NULL; 232 return 0; 233 } 234 235 static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, 236 struct snd_pcm_hw_params *hw_params) 237 { 238 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 239 int channels = params_channels(hw_params); 240 int val; 241 242 val = ssc_readl(chip->ssc->regs, TFMR); 243 val = SSC_BFINS(TFMR_DATNB, channels - 1, val); 244 ssc_writel(chip->ssc->regs, TFMR, val); 245 246 return snd_pcm_lib_malloc_pages(substream, 247 params_buffer_bytes(hw_params)); 248 } 249 250 static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream) 251 { 252 return snd_pcm_lib_free_pages(substream); 253 } 254 255 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) 256 { 257 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 258 struct snd_pcm_runtime *runtime = substream->runtime; 259 int block_size; 260 261 block_size = frames_to_bytes(runtime, runtime->period_size); 262 263 chip->period = 0; 264 265 ssc_writel(chip->ssc->regs, PDC_TPR, 266 (long)runtime->dma_addr); 267 ssc_writel(chip->ssc->regs, PDC_TCR, 268 runtime->period_size * runtime->channels); 269 ssc_writel(chip->ssc->regs, PDC_TNPR, 270 (long)runtime->dma_addr + block_size); 271 ssc_writel(chip->ssc->regs, PDC_TNCR, 272 runtime->period_size * runtime->channels); 273 274 return 0; 275 } 276 277 static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, 278 int cmd) 279 { 280 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 281 int retval = 0; 282 283 spin_lock(&chip->lock); 284 285 switch (cmd) { 286 case SNDRV_PCM_TRIGGER_START: 287 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); 288 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); 289 break; 290 case SNDRV_PCM_TRIGGER_STOP: 291 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); 292 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); 293 break; 294 default: 295 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); 296 retval = -EINVAL; 297 break; 298 } 299 300 spin_unlock(&chip->lock); 301 302 return retval; 303 } 304 305 static snd_pcm_uframes_t 306 snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) 307 { 308 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); 309 struct snd_pcm_runtime *runtime = substream->runtime; 310 snd_pcm_uframes_t pos; 311 unsigned long bytes; 312 313 bytes = ssc_readl(chip->ssc->regs, PDC_TPR) 314 - (unsigned long)runtime->dma_addr; 315 316 pos = bytes_to_frames(runtime, bytes); 317 if (pos >= runtime->buffer_size) 318 pos -= runtime->buffer_size; 319 320 return pos; 321 } 322 323 static struct snd_pcm_ops at73c213_playback_ops = { 324 .open = snd_at73c213_pcm_open, 325 .close = snd_at73c213_pcm_close, 326 .ioctl = snd_pcm_lib_ioctl, 327 .hw_params = snd_at73c213_pcm_hw_params, 328 .hw_free = snd_at73c213_pcm_hw_free, 329 .prepare = snd_at73c213_pcm_prepare, 330 .trigger = snd_at73c213_pcm_trigger, 331 .pointer = snd_at73c213_pcm_pointer, 332 }; 333 334 static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) 335 { 336 struct snd_pcm *pcm; 337 int retval; 338 339 retval = snd_pcm_new(chip->card, chip->card->shortname, 340 device, 1, 0, &pcm); 341 if (retval < 0) 342 goto out; 343 344 pcm->private_data = chip; 345 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; 346 strcpy(pcm->name, "at73c213"); 347 chip->pcm = pcm; 348 349 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); 350 351 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm, 352 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, 353 64 * 1024, 64 * 1024); 354 out: 355 return retval; 356 } 357 358 static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) 359 { 360 struct snd_at73c213 *chip = dev_id; 361 struct snd_pcm_runtime *runtime = chip->substream->runtime; 362 u32 status; 363 int offset; 364 int block_size; 365 int next_period; 366 int retval = IRQ_NONE; 367 368 spin_lock(&chip->lock); 369 370 block_size = frames_to_bytes(runtime, runtime->period_size); 371 status = ssc_readl(chip->ssc->regs, IMR); 372 373 if (status & SSC_BIT(IMR_ENDTX)) { 374 chip->period++; 375 if (chip->period == runtime->periods) 376 chip->period = 0; 377 next_period = chip->period + 1; 378 if (next_period == runtime->periods) 379 next_period = 0; 380 381 offset = block_size * next_period; 382 383 ssc_writel(chip->ssc->regs, PDC_TNPR, 384 (long)runtime->dma_addr + offset); 385 ssc_writel(chip->ssc->regs, PDC_TNCR, 386 runtime->period_size * runtime->channels); 387 retval = IRQ_HANDLED; 388 } 389 390 ssc_readl(chip->ssc->regs, IMR); 391 spin_unlock(&chip->lock); 392 393 if (status & SSC_BIT(IMR_ENDTX)) 394 snd_pcm_period_elapsed(chip->substream); 395 396 return retval; 397 } 398 399 /* 400 * Mixer functions. 401 */ 402 static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, 403 struct snd_ctl_elem_value *ucontrol) 404 { 405 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 406 int reg = kcontrol->private_value & 0xff; 407 int shift = (kcontrol->private_value >> 8) & 0xff; 408 int mask = (kcontrol->private_value >> 16) & 0xff; 409 int invert = (kcontrol->private_value >> 24) & 0xff; 410 411 mutex_lock(&chip->mixer_lock); 412 413 ucontrol->value.integer.value[0] = 414 (chip->reg_image[reg] >> shift) & mask; 415 416 if (invert) 417 ucontrol->value.integer.value[0] = 418 mask - ucontrol->value.integer.value[0]; 419 420 mutex_unlock(&chip->mixer_lock); 421 422 return 0; 423 } 424 425 static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, 426 struct snd_ctl_elem_value *ucontrol) 427 { 428 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 429 int reg = kcontrol->private_value & 0xff; 430 int shift = (kcontrol->private_value >> 8) & 0xff; 431 int mask = (kcontrol->private_value >> 16) & 0xff; 432 int invert = (kcontrol->private_value >> 24) & 0xff; 433 int change, retval; 434 unsigned short val; 435 436 val = (ucontrol->value.integer.value[0] & mask); 437 if (invert) 438 val = mask - val; 439 val <<= shift; 440 441 mutex_lock(&chip->mixer_lock); 442 443 val = (chip->reg_image[reg] & ~(mask << shift)) | val; 444 change = val != chip->reg_image[reg]; 445 retval = snd_at73c213_write_reg(chip, reg, val); 446 447 mutex_unlock(&chip->mixer_lock); 448 449 if (retval) 450 return retval; 451 452 return change; 453 } 454 455 static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, 456 struct snd_ctl_elem_info *uinfo) 457 { 458 int mask = (kcontrol->private_value >> 24) & 0xff; 459 460 if (mask == 1) 461 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 462 else 463 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 464 465 uinfo->count = 2; 466 uinfo->value.integer.min = 0; 467 uinfo->value.integer.max = mask; 468 469 return 0; 470 } 471 472 static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, 473 struct snd_ctl_elem_value *ucontrol) 474 { 475 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 476 int left_reg = kcontrol->private_value & 0xff; 477 int right_reg = (kcontrol->private_value >> 8) & 0xff; 478 int shift_left = (kcontrol->private_value >> 16) & 0x07; 479 int shift_right = (kcontrol->private_value >> 19) & 0x07; 480 int mask = (kcontrol->private_value >> 24) & 0xff; 481 int invert = (kcontrol->private_value >> 22) & 1; 482 483 mutex_lock(&chip->mixer_lock); 484 485 ucontrol->value.integer.value[0] = 486 (chip->reg_image[left_reg] >> shift_left) & mask; 487 ucontrol->value.integer.value[1] = 488 (chip->reg_image[right_reg] >> shift_right) & mask; 489 490 if (invert) { 491 ucontrol->value.integer.value[0] = 492 mask - ucontrol->value.integer.value[0]; 493 ucontrol->value.integer.value[1] = 494 mask - ucontrol->value.integer.value[1]; 495 } 496 497 mutex_unlock(&chip->mixer_lock); 498 499 return 0; 500 } 501 502 static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, 503 struct snd_ctl_elem_value *ucontrol) 504 { 505 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 506 int left_reg = kcontrol->private_value & 0xff; 507 int right_reg = (kcontrol->private_value >> 8) & 0xff; 508 int shift_left = (kcontrol->private_value >> 16) & 0x07; 509 int shift_right = (kcontrol->private_value >> 19) & 0x07; 510 int mask = (kcontrol->private_value >> 24) & 0xff; 511 int invert = (kcontrol->private_value >> 22) & 1; 512 int change, retval; 513 unsigned short val1, val2; 514 515 val1 = ucontrol->value.integer.value[0] & mask; 516 val2 = ucontrol->value.integer.value[1] & mask; 517 if (invert) { 518 val1 = mask - val1; 519 val2 = mask - val2; 520 } 521 val1 <<= shift_left; 522 val2 <<= shift_right; 523 524 mutex_lock(&chip->mixer_lock); 525 526 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; 527 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; 528 change = val1 != chip->reg_image[left_reg] 529 || val2 != chip->reg_image[right_reg]; 530 retval = snd_at73c213_write_reg(chip, left_reg, val1); 531 if (retval) { 532 mutex_unlock(&chip->mixer_lock); 533 goto out; 534 } 535 retval = snd_at73c213_write_reg(chip, right_reg, val2); 536 if (retval) { 537 mutex_unlock(&chip->mixer_lock); 538 goto out; 539 } 540 541 mutex_unlock(&chip->mixer_lock); 542 543 return change; 544 545 out: 546 return retval; 547 } 548 549 #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info 550 551 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol, 552 struct snd_ctl_elem_value *ucontrol) 553 { 554 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 555 int reg = kcontrol->private_value & 0xff; 556 int shift = (kcontrol->private_value >> 8) & 0xff; 557 int invert = (kcontrol->private_value >> 24) & 0xff; 558 559 mutex_lock(&chip->mixer_lock); 560 561 ucontrol->value.integer.value[0] = 562 (chip->reg_image[reg] >> shift) & 0x01; 563 564 if (invert) 565 ucontrol->value.integer.value[0] = 566 0x01 - ucontrol->value.integer.value[0]; 567 568 mutex_unlock(&chip->mixer_lock); 569 570 return 0; 571 } 572 573 static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol, 574 struct snd_ctl_elem_value *ucontrol) 575 { 576 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); 577 int reg = kcontrol->private_value & 0xff; 578 int shift = (kcontrol->private_value >> 8) & 0xff; 579 int mask = (kcontrol->private_value >> 16) & 0xff; 580 int invert = (kcontrol->private_value >> 24) & 0xff; 581 int change, retval; 582 unsigned short val; 583 584 if (ucontrol->value.integer.value[0]) 585 val = mask; 586 else 587 val = 0; 588 589 if (invert) 590 val = mask - val; 591 val <<= shift; 592 593 mutex_lock(&chip->mixer_lock); 594 595 val |= (chip->reg_image[reg] & ~(mask << shift)); 596 change = val != chip->reg_image[reg]; 597 598 retval = snd_at73c213_write_reg(chip, reg, val); 599 600 mutex_unlock(&chip->mixer_lock); 601 602 if (retval) 603 return retval; 604 605 return change; 606 } 607 608 static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol, 609 struct snd_ctl_elem_info *uinfo) 610 { 611 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 612 uinfo->count = 1; 613 uinfo->value.integer.min = 0; 614 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1; 615 616 return 0; 617 } 618 619 static int snd_at73c213_line_capture_volume_info( 620 struct snd_kcontrol *kcontrol, 621 struct snd_ctl_elem_info *uinfo) 622 { 623 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 624 uinfo->count = 2; 625 /* When inverted will give values 0x10001 => 0. */ 626 uinfo->value.integer.min = 14; 627 uinfo->value.integer.max = 31; 628 629 return 0; 630 } 631 632 static int snd_at73c213_aux_capture_volume_info( 633 struct snd_kcontrol *kcontrol, 634 struct snd_ctl_elem_info *uinfo) 635 { 636 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 637 uinfo->count = 1; 638 /* When inverted will give values 0x10001 => 0. */ 639 uinfo->value.integer.min = 14; 640 uinfo->value.integer.max = 31; 641 642 return 0; 643 } 644 645 #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \ 646 { \ 647 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ 648 .name = xname, \ 649 .index = xindex, \ 650 .info = snd_at73c213_mono_switch_info, \ 651 .get = snd_at73c213_mono_switch_get, \ 652 .put = snd_at73c213_mono_switch_put, \ 653 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \ 654 } 655 656 #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \ 657 { \ 658 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ 659 .name = xname, \ 660 .index = xindex, \ 661 .info = snd_at73c213_stereo_info, \ 662 .get = snd_at73c213_stereo_get, \ 663 .put = snd_at73c213_stereo_put, \ 664 .private_value = (left_reg | (right_reg << 8) \ 665 | (shift_left << 16) | (shift_right << 19) \ 666 | (mask << 24) | (invert << 22)) \ 667 } 668 669 static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = { 670 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1), 671 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1), 672 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1), 673 AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1), 674 AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV, 675 0x01, 0), 676 { 677 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 678 .name = "PA Playback Volume", 679 .index = 0, 680 .info = snd_at73c213_pa_volume_info, 681 .get = snd_at73c213_mono_get, 682 .put = snd_at73c213_mono_put, 683 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \ 684 (0x0f << 16) | (1 << 24), 685 }, 686 AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP, 687 0x01, 1), 688 AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0), 689 { 690 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 691 .name = "Aux Capture Volume", 692 .index = 0, 693 .info = snd_at73c213_aux_capture_volume_info, 694 .get = snd_at73c213_mono_get, 695 .put = snd_at73c213_mono_put, 696 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24), 697 }, 698 AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN, 699 0x01, 0), 700 { 701 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 702 .name = "Line Capture Volume", 703 .index = 0, 704 .info = snd_at73c213_line_capture_volume_info, 705 .get = snd_at73c213_stereo_get, 706 .put = snd_at73c213_stereo_put, 707 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19) 708 | (0x1f << 24) | (1 << 22), 709 }, 710 AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0), 711 }; 712 713 static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip) 714 { 715 struct snd_card *card; 716 int errval, idx; 717 718 if (chip == NULL || chip->pcm == NULL) 719 return -EINVAL; 720 721 card = chip->card; 722 723 strcpy(card->mixername, chip->pcm->name); 724 725 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) { 726 errval = snd_ctl_add(card, 727 snd_ctl_new1(&snd_at73c213_controls[idx], 728 chip)); 729 if (errval < 0) 730 goto cleanup; 731 } 732 733 return 0; 734 735 cleanup: 736 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) { 737 struct snd_kcontrol *kctl; 738 kctl = snd_ctl_find_numid(card, idx); 739 if (kctl) 740 snd_ctl_remove(card, kctl); 741 } 742 return errval; 743 } 744 745 /* 746 * Device functions 747 */ 748 static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip) 749 { 750 /* 751 * Continuous clock output. 752 * Starts on falling TF. 753 * Delay 1 cycle (1 bit). 754 * Periode is 16 bit (16 - 1). 755 */ 756 ssc_writel(chip->ssc->regs, TCMR, 757 SSC_BF(TCMR_CKO, 1) 758 | SSC_BF(TCMR_START, 4) 759 | SSC_BF(TCMR_STTDLY, 1) 760 | SSC_BF(TCMR_PERIOD, 16 - 1)); 761 /* 762 * Data length is 16 bit (16 - 1). 763 * Transmit MSB first. 764 * Transmit 2 words each transfer. 765 * Frame sync length is 16 bit (16 - 1). 766 * Frame starts on negative pulse. 767 */ 768 ssc_writel(chip->ssc->regs, TFMR, 769 SSC_BF(TFMR_DATLEN, 16 - 1) 770 | SSC_BIT(TFMR_MSBF) 771 | SSC_BF(TFMR_DATNB, 1) 772 | SSC_BF(TFMR_FSLEN, 16 - 1) 773 | SSC_BF(TFMR_FSOS, 1)); 774 775 return 0; 776 } 777 778 static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip) 779 { 780 int retval; 781 unsigned char dac_ctrl = 0; 782 783 retval = snd_at73c213_set_bitrate(chip); 784 if (retval) 785 goto out; 786 787 /* Enable DAC master clock. */ 788 clk_enable(chip->board->dac_clk); 789 790 /* Initialize at73c213 on SPI bus. */ 791 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); 792 if (retval) 793 goto out_clk; 794 msleep(1); 795 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03); 796 if (retval) 797 goto out_clk; 798 799 /* Precharge everything. */ 800 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff); 801 if (retval) 802 goto out_clk; 803 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH)); 804 if (retval) 805 goto out_clk; 806 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 807 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR)); 808 if (retval) 809 goto out_clk; 810 811 msleep(50); 812 813 /* Stop precharging PA. */ 814 retval = snd_at73c213_write_reg(chip, PA_CTRL, 815 (1<<PA_CTRL_APALP) | 0x0f); 816 if (retval) 817 goto out_clk; 818 819 msleep(450); 820 821 /* Stop precharging DAC, turn on master power. */ 822 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR)); 823 if (retval) 824 goto out_clk; 825 826 msleep(1); 827 828 /* Turn on DAC. */ 829 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR) 830 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR); 831 832 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl); 833 if (retval) 834 goto out_clk; 835 836 /* Mute sound. */ 837 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); 838 if (retval) 839 goto out_clk; 840 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); 841 if (retval) 842 goto out_clk; 843 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); 844 if (retval) 845 goto out_clk; 846 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); 847 if (retval) 848 goto out_clk; 849 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); 850 if (retval) 851 goto out_clk; 852 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); 853 if (retval) 854 goto out_clk; 855 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); 856 if (retval) 857 goto out_clk; 858 859 /* Enable I2S device, i.e. clock output. */ 860 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); 861 862 goto out; 863 864 out_clk: 865 clk_disable(chip->board->dac_clk); 866 out: 867 return retval; 868 } 869 870 static int snd_at73c213_dev_free(struct snd_device *device) 871 { 872 struct snd_at73c213 *chip = device->device_data; 873 874 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); 875 if (chip->irq >= 0) { 876 free_irq(chip->irq, chip); 877 chip->irq = -1; 878 } 879 880 return 0; 881 } 882 883 static int __devinit snd_at73c213_dev_init(struct snd_card *card, 884 struct spi_device *spi) 885 { 886 static struct snd_device_ops ops = { 887 .dev_free = snd_at73c213_dev_free, 888 }; 889 struct snd_at73c213 *chip = get_chip(card); 890 int irq, retval; 891 892 irq = chip->ssc->irq; 893 if (irq < 0) 894 return irq; 895 896 spin_lock_init(&chip->lock); 897 mutex_init(&chip->mixer_lock); 898 chip->card = card; 899 chip->irq = -1; 900 901 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); 902 if (retval) { 903 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); 904 goto out; 905 } 906 chip->irq = irq; 907 908 memcpy(&chip->reg_image, &snd_at73c213_original_image, 909 sizeof(snd_at73c213_original_image)); 910 911 retval = snd_at73c213_ssc_init(chip); 912 if (retval) 913 goto out_irq; 914 915 retval = snd_at73c213_chip_init(chip); 916 if (retval) 917 goto out_irq; 918 919 retval = snd_at73c213_pcm_new(chip, 0); 920 if (retval) 921 goto out_irq; 922 923 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); 924 if (retval) 925 goto out_irq; 926 927 retval = snd_at73c213_mixer(chip); 928 if (retval) 929 goto out_snd_dev; 930 931 snd_card_set_dev(card, &spi->dev); 932 933 goto out; 934 935 out_snd_dev: 936 snd_device_free(card, chip); 937 out_irq: 938 free_irq(chip->irq, chip); 939 chip->irq = -1; 940 out: 941 return retval; 942 } 943 944 static int __devinit snd_at73c213_probe(struct spi_device *spi) 945 { 946 struct snd_card *card; 947 struct snd_at73c213 *chip; 948 struct at73c213_board_info *board; 949 int retval; 950 char id[16]; 951 952 board = spi->dev.platform_data; 953 if (!board) { 954 dev_dbg(&spi->dev, "no platform_data\n"); 955 return -ENXIO; 956 } 957 958 if (!board->dac_clk) { 959 dev_dbg(&spi->dev, "no DAC clk\n"); 960 return -ENXIO; 961 } 962 963 if (IS_ERR(board->dac_clk)) { 964 dev_dbg(&spi->dev, "no DAC clk\n"); 965 return PTR_ERR(board->dac_clk); 966 } 967 968 /* Allocate "card" using some unused identifiers. */ 969 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); 970 retval = snd_card_create(-1, id, THIS_MODULE, 971 sizeof(struct snd_at73c213), &card); 972 if (retval < 0) 973 goto out; 974 975 chip = card->private_data; 976 chip->spi = spi; 977 chip->board = board; 978 979 chip->ssc = ssc_request(board->ssc_id); 980 if (IS_ERR(chip->ssc)) { 981 dev_dbg(&spi->dev, "could not get ssc%d device\n", 982 board->ssc_id); 983 retval = PTR_ERR(chip->ssc); 984 goto out_card; 985 } 986 987 retval = snd_at73c213_dev_init(card, spi); 988 if (retval) 989 goto out_ssc; 990 991 strcpy(card->driver, "at73c213"); 992 strcpy(card->shortname, board->shortname); 993 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq); 994 995 retval = snd_card_register(card); 996 if (retval) 997 goto out_ssc; 998 999 dev_set_drvdata(&spi->dev, card); 1000 1001 goto out; 1002 1003 out_ssc: 1004 ssc_free(chip->ssc); 1005 out_card: 1006 snd_card_free(card); 1007 out: 1008 return retval; 1009 } 1010 1011 static int __devexit snd_at73c213_remove(struct spi_device *spi) 1012 { 1013 struct snd_card *card = dev_get_drvdata(&spi->dev); 1014 struct snd_at73c213 *chip = card->private_data; 1015 int retval; 1016 1017 /* Stop playback. */ 1018 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); 1019 1020 /* Mute sound. */ 1021 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); 1022 if (retval) 1023 goto out; 1024 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); 1025 if (retval) 1026 goto out; 1027 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); 1028 if (retval) 1029 goto out; 1030 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); 1031 if (retval) 1032 goto out; 1033 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); 1034 if (retval) 1035 goto out; 1036 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); 1037 if (retval) 1038 goto out; 1039 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); 1040 if (retval) 1041 goto out; 1042 1043 /* Turn off PA. */ 1044 retval = snd_at73c213_write_reg(chip, PA_CTRL, 1045 chip->reg_image[PA_CTRL] | 0x0f); 1046 if (retval) 1047 goto out; 1048 msleep(10); 1049 retval = snd_at73c213_write_reg(chip, PA_CTRL, 1050 (1 << PA_CTRL_APALP) | 0x0f); 1051 if (retval) 1052 goto out; 1053 1054 /* Turn off external DAC. */ 1055 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c); 1056 if (retval) 1057 goto out; 1058 msleep(2); 1059 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00); 1060 if (retval) 1061 goto out; 1062 1063 /* Turn off master power. */ 1064 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00); 1065 if (retval) 1066 goto out; 1067 1068 out: 1069 /* Stop DAC master clock. */ 1070 clk_disable(chip->board->dac_clk); 1071 1072 ssc_free(chip->ssc); 1073 snd_card_free(card); 1074 dev_set_drvdata(&spi->dev, NULL); 1075 1076 return 0; 1077 } 1078 1079 #ifdef CONFIG_PM 1080 static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg) 1081 { 1082 struct snd_card *card = dev_get_drvdata(&spi->dev); 1083 struct snd_at73c213 *chip = card->private_data; 1084 1085 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); 1086 clk_disable(chip->board->dac_clk); 1087 1088 return 0; 1089 } 1090 1091 static int snd_at73c213_resume(struct spi_device *spi) 1092 { 1093 struct snd_card *card = dev_get_drvdata(&spi->dev); 1094 struct snd_at73c213 *chip = card->private_data; 1095 1096 clk_enable(chip->board->dac_clk); 1097 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); 1098 1099 return 0; 1100 } 1101 #else 1102 #define snd_at73c213_suspend NULL 1103 #define snd_at73c213_resume NULL 1104 #endif 1105 1106 static struct spi_driver at73c213_driver = { 1107 .driver = { 1108 .name = "at73c213", 1109 }, 1110 .probe = snd_at73c213_probe, 1111 .suspend = snd_at73c213_suspend, 1112 .resume = snd_at73c213_resume, 1113 .remove = __devexit_p(snd_at73c213_remove), 1114 }; 1115 1116 static int __init at73c213_init(void) 1117 { 1118 return spi_register_driver(&at73c213_driver); 1119 } 1120 module_init(at73c213_init); 1121 1122 static void __exit at73c213_exit(void) 1123 { 1124 spi_unregister_driver(&at73c213_driver); 1125 } 1126 module_exit(at73c213_exit); 1127 1128 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); 1129 MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); 1130 MODULE_LICENSE("GPL"); 1131