Lines Matching +full:i2s +full:- +full:regs
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
5 * Copyright (C) 2006-2007 Atmel Norway
14 #include <linux/dma-mapping.h>
27 #include <linux/atmel-ssc.h>
41 0x00, /* 00 - CTRL */
42 0x05, /* 01 - LLIG */
43 0x05, /* 02 - RLIG */
44 0x08, /* 03 - LPMG */
45 0x08, /* 04 - RPMG */
46 0x00, /* 05 - LLOG */
47 0x00, /* 06 - RLOG */
48 0x22, /* 07 - OLC */
49 0x09, /* 08 - MC */
50 0x00, /* 09 - CSFC */
51 0x00, /* 0A - MISC */
52 0x00, /* 0B - */
53 0x00, /* 0C - PRECH */
54 0x05, /* 0D - AUXG */
55 0x00, /* 0E - */
56 0x00, /* 0F - */
57 0x00, /* 10 - RST */
58 0x00, /* 11 - PA_CTRL */
81 #define get_chip(card) ((struct snd_at73c213 *)card->private_data)
95 chip->spi_wbuffer[0] = reg;
96 chip->spi_wbuffer[1] = val;
98 msg_xfer.tx_buf = chip->spi_wbuffer;
99 msg_xfer.rx_buf = chip->spi_rbuffer;
102 retval = spi_sync(chip->spi, &msg);
105 chip->reg_image[reg] = val;
115 .rate_min = 8000, /* Replaced by chip->bitrate later. */
116 .rate_max = 50000, /* Replaced by chip->bitrate later. */
119 .buffer_bytes_max = 64 * 1024 - 1,
121 .period_bytes_max = 64 * 1024 - 1,
131 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
138 * We connect two clocks here, picking divisors so the I2S clocks
143 * or (not here) 384 times the I2S output clock (BCLK).
146 /* SSC clock / (bitrate * stereo * 16-bit). */
150 max_tries = (ssc_div_max - ssc_div_min) / 2;
159 ssc_div -= 2;
161 return -ENXIO;
166 /* SSC clock / (ssc divider * 16-bit * stereo). */
168 return -ENXIO;
173 status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
182 } while (--max_tries);
185 return -ENXIO;
188 status = clk_set_rate(chip->board->dac_clk, status);
193 ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
195 /* SSC clock / (ssc divider * 16-bit * stereo). */
196 chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
198 dev_info(&chip->spi->dev,
200 chip->bitrate, ssc_div);
208 struct snd_pcm_runtime *runtime = substream->runtime;
216 snd_at73c213_playback_hw.rate_min = chip->bitrate;
217 snd_at73c213_playback_hw.rate_max = chip->bitrate;
218 runtime->hw = snd_at73c213_playback_hw;
219 chip->substream = substream;
221 err = clk_enable(chip->ssc->clk);
231 chip->substream = NULL;
232 clk_disable(chip->ssc->clk);
243 val = ssc_readl(chip->ssc->regs, TFMR);
244 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
245 ssc_writel(chip->ssc->regs, TFMR, val);
253 struct snd_pcm_runtime *runtime = substream->runtime;
256 block_size = frames_to_bytes(runtime, runtime->period_size);
258 chip->period = 0;
260 ssc_writel(chip->ssc->regs, PDC_TPR,
261 (long)runtime->dma_addr);
262 ssc_writel(chip->ssc->regs, PDC_TCR,
263 runtime->period_size * runtime->channels);
264 ssc_writel(chip->ssc->regs, PDC_TNPR,
265 (long)runtime->dma_addr + block_size);
266 ssc_writel(chip->ssc->regs, PDC_TNCR,
267 runtime->period_size * runtime->channels);
277 guard(spinlock)(&chip->lock);
281 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
282 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
285 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
286 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
289 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
290 return -EINVAL;
301 struct snd_pcm_runtime *runtime = substream->runtime;
305 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
306 - (unsigned long)runtime->dma_addr;
309 if (pos >= runtime->buffer_size)
310 pos -= runtime->buffer_size;
329 retval = snd_pcm_new(chip->card, chip->card->shortname,
334 pcm->private_data = chip;
335 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
336 strscpy(pcm->name, "at73c213");
337 chip->pcm = pcm;
341 snd_pcm_set_managed_buffer_all(chip->pcm,
342 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
351 struct snd_pcm_runtime *runtime = chip->substream->runtime;
358 scoped_guard(spinlock, &chip->lock) {
359 block_size = frames_to_bytes(runtime, runtime->period_size);
360 status = ssc_readl(chip->ssc->regs, IMR);
363 chip->period++;
364 if (chip->period == runtime->periods)
365 chip->period = 0;
366 next_period = chip->period + 1;
367 if (next_period == runtime->periods)
372 ssc_writel(chip->ssc->regs, PDC_TNPR,
373 (long)runtime->dma_addr + offset);
374 ssc_writel(chip->ssc->regs, PDC_TNCR,
375 runtime->period_size * runtime->channels);
379 ssc_readl(chip->ssc->regs, IMR);
383 snd_pcm_period_elapsed(chip->substream);
395 int reg = kcontrol->private_value & 0xff;
396 int shift = (kcontrol->private_value >> 8) & 0xff;
397 int mask = (kcontrol->private_value >> 16) & 0xff;
398 int invert = (kcontrol->private_value >> 24) & 0xff;
400 guard(mutex)(&chip->mixer_lock);
402 ucontrol->value.integer.value[0] =
403 (chip->reg_image[reg] >> shift) & mask;
406 ucontrol->value.integer.value[0] =
407 mask - ucontrol->value.integer.value[0];
416 int reg = kcontrol->private_value & 0xff;
417 int shift = (kcontrol->private_value >> 8) & 0xff;
418 int mask = (kcontrol->private_value >> 16) & 0xff;
419 int invert = (kcontrol->private_value >> 24) & 0xff;
423 val = (ucontrol->value.integer.value[0] & mask);
425 val = mask - val;
428 guard(mutex)(&chip->mixer_lock);
430 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
431 change = val != chip->reg_image[reg];
443 int mask = (kcontrol->private_value >> 24) & 0xff;
446 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
448 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
450 uinfo->count = 2;
451 uinfo->value.integer.min = 0;
452 uinfo->value.integer.max = mask;
461 int left_reg = kcontrol->private_value & 0xff;
462 int right_reg = (kcontrol->private_value >> 8) & 0xff;
463 int shift_left = (kcontrol->private_value >> 16) & 0x07;
464 int shift_right = (kcontrol->private_value >> 19) & 0x07;
465 int mask = (kcontrol->private_value >> 24) & 0xff;
466 int invert = (kcontrol->private_value >> 22) & 1;
468 guard(mutex)(&chip->mixer_lock);
470 ucontrol->value.integer.value[0] =
471 (chip->reg_image[left_reg] >> shift_left) & mask;
472 ucontrol->value.integer.value[1] =
473 (chip->reg_image[right_reg] >> shift_right) & mask;
476 ucontrol->value.integer.value[0] =
477 mask - ucontrol->value.integer.value[0];
478 ucontrol->value.integer.value[1] =
479 mask - ucontrol->value.integer.value[1];
489 int left_reg = kcontrol->private_value & 0xff;
490 int right_reg = (kcontrol->private_value >> 8) & 0xff;
491 int shift_left = (kcontrol->private_value >> 16) & 0x07;
492 int shift_right = (kcontrol->private_value >> 19) & 0x07;
493 int mask = (kcontrol->private_value >> 24) & 0xff;
494 int invert = (kcontrol->private_value >> 22) & 1;
498 val1 = ucontrol->value.integer.value[0] & mask;
499 val2 = ucontrol->value.integer.value[1] & mask;
501 val1 = mask - val1;
502 val2 = mask - val2;
507 guard(mutex)(&chip->mixer_lock);
509 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
510 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
511 change = val1 != chip->reg_image[left_reg]
512 || val2 != chip->reg_image[right_reg];
529 int reg = kcontrol->private_value & 0xff;
530 int shift = (kcontrol->private_value >> 8) & 0xff;
531 int invert = (kcontrol->private_value >> 24) & 0xff;
533 guard(mutex)(&chip->mixer_lock);
535 ucontrol->value.integer.value[0] =
536 (chip->reg_image[reg] >> shift) & 0x01;
539 ucontrol->value.integer.value[0] =
540 0x01 - ucontrol->value.integer.value[0];
549 int reg = kcontrol->private_value & 0xff;
550 int shift = (kcontrol->private_value >> 8) & 0xff;
551 int mask = (kcontrol->private_value >> 16) & 0xff;
552 int invert = (kcontrol->private_value >> 24) & 0xff;
556 if (ucontrol->value.integer.value[0])
562 val = mask - val;
565 guard(mutex)(&chip->mixer_lock);
567 val |= (chip->reg_image[reg] & ~(mask << shift));
568 change = val != chip->reg_image[reg];
581 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
582 uinfo->count = 1;
583 uinfo->value.integer.min = 0;
584 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
593 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
594 uinfo->count = 2;
596 uinfo->value.integer.min = 14;
597 uinfo->value.integer.max = 31;
606 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
607 uinfo->count = 1;
609 uinfo->value.integer.min = 14;
610 uinfo->value.integer.max = 31;
688 if (chip == NULL || chip->pcm == NULL)
689 return -EINVAL;
691 card = chip->card;
693 strscpy(card->mixername, chip->pcm->name);
720 * Periode is 16 bit (16 - 1).
722 ssc_writel(chip->ssc->regs, TCMR,
726 | SSC_BF(TCMR_PERIOD, 16 - 1));
728 * Data length is 16 bit (16 - 1).
731 * Frame sync length is 16 bit (16 - 1).
734 ssc_writel(chip->ssc->regs, TFMR,
735 SSC_BF(TFMR_DATLEN, 16 - 1)
738 | SSC_BF(TFMR_FSLEN, 16 - 1)
754 retval = clk_enable(chip->board->dac_clk);
827 /* Enable I2S device, i.e. clock output. */
828 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
833 clk_disable(chip->board->dac_clk);
840 struct snd_at73c213 *chip = device->device_data;
842 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
843 if (chip->irq >= 0) {
844 free_irq(chip->irq, chip);
845 chip->irq = -1;
860 irq = chip->ssc->irq;
864 spin_lock_init(&chip->lock);
865 mutex_init(&chip->mixer_lock);
866 chip->card = card;
867 chip->irq = -1;
869 retval = clk_enable(chip->ssc->clk);
875 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
878 chip->irq = irq;
880 memcpy(&chip->reg_image, &snd_at73c213_original_image,
908 free_irq(chip->irq, chip);
909 chip->irq = -1;
911 clk_disable(chip->ssc->clk);
924 board = spi->dev.platform_data;
926 dev_dbg(&spi->dev, "no platform_data\n");
927 return -ENXIO;
930 if (!board->dac_clk) {
931 dev_dbg(&spi->dev, "no DAC clk\n");
932 return -ENXIO;
935 if (IS_ERR(board->dac_clk)) {
936 dev_dbg(&spi->dev, "no DAC clk\n");
937 return PTR_ERR(board->dac_clk);
941 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
942 retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
947 chip = card->private_data;
948 chip->spi = spi;
949 chip->board = board;
951 chip->ssc = ssc_request(board->ssc_id);
952 if (IS_ERR(chip->ssc)) {
953 dev_dbg(&spi->dev, "could not get ssc%d device\n",
954 board->ssc_id);
955 retval = PTR_ERR(chip->ssc);
963 strscpy(card->driver, "at73c213");
964 strscpy(card->shortname, board->shortname);
965 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
971 dev_set_drvdata(&spi->dev, card);
976 ssc_free(chip->ssc);
985 struct snd_card *card = dev_get_drvdata(&spi->dev);
986 struct snd_at73c213 *chip = card->private_data;
990 retval = clk_enable(chip->ssc->clk);
993 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
994 clk_disable(chip->ssc->clk);
1021 chip->reg_image[PA_CTRL] | 0x0f);
1046 clk_disable(chip->board->dac_clk);
1048 ssc_free(chip->ssc);
1055 struct snd_at73c213 *chip = card->private_data;
1057 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1058 clk_disable(chip->ssc->clk);
1059 clk_disable(chip->board->dac_clk);
1067 struct snd_at73c213 *chip = card->private_data;
1070 retval = clk_enable(chip->board->dac_clk);
1073 retval = clk_enable(chip->ssc->clk);
1075 clk_disable(chip->board->dac_clk);
1078 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1097 MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");