2 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
4 * Copyright (C) 2006-2007 Atmel Norway
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.
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>
25 #include <sound/initval.h>
26 #include <sound/control.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
30 #include <linux/atmel-ssc.h>
32 #include <linux/spi/spi.h>
33 #include <linux/spi/at73c213.h>
37 #define BITRATE_MIN 8000 /* Hardware limit? */
38 #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
39 #define BITRATE_MAX 50000 /* Hardware limit. */
41 /* Initial (hardware reset) AT73C213 register values. */
42 static u8 snd_at73c213_original_image[18] =
56 0x00, /* 0C - PRECH */
61 0x00, /* 11 - PA_CTRL */
65 struct snd_card *card;
67 struct snd_pcm_substream *substream;
68 struct at73c213_board_info *board;
71 unsigned long bitrate;
73 struct ssc_device *ssc;
74 struct spi_device *spi;
77 /* Image of the SPI registers in AT73C213. */
79 /* Protect SSC registers against concurrent access. */
81 /* Protect mixer registers against concurrent access. */
82 struct mutex mixer_lock;
85 #define get_chip(card) ((struct snd_at73c213 *)card->private_data)
88 snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
90 struct spi_message msg;
91 struct spi_transfer msg_xfer = {
97 spi_message_init(&msg);
99 chip->spi_wbuffer[0] = reg;
100 chip->spi_wbuffer[1] = val;
102 msg_xfer.tx_buf = chip->spi_wbuffer;
103 msg_xfer.rx_buf = chip->spi_rbuffer;
104 spi_message_add_tail(&msg_xfer, &msg);
106 retval = spi_sync(chip->spi, &msg);
109 chip->reg_image[reg] = val;
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. */
123 .buffer_bytes_max = 64 * 1024 - 1,
124 .period_bytes_min = 512,
125 .period_bytes_max = 64 * 1024 - 1,
131 * Calculate and set bitrate and divisions.
133 static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
135 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
136 unsigned long dac_rate_new, ssc_div;
138 unsigned long ssc_div_max, ssc_div_min;
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.
146 * The DAC master clock (MCLK) is programmable, and is either 256
147 * or (not here) 384 times the I2S output clock (BCLK).
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;
159 /* ssc_div must be a power of 2. */
160 ssc_div = (ssc_div + 1) & ~1UL;
162 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
164 if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
168 /* Search for a possible bitrate. */
170 /* SSC clock / (ssc divider * 16-bit * stereo). */
171 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
174 /* 256 / (2 * 16) = 8 */
175 dac_rate_new = 8 * (ssc_rate / ssc_div);
177 status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
181 /* Ignore difference smaller than 256 Hz. */
182 if ((status/256) == (dac_rate_new/256))
186 } while (--max_tries);
188 /* Not able to find a valid bitrate. */
192 status = clk_set_rate(chip->board->dac_clk, status);
196 /* Set divider in SSC device. */
197 ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
199 /* SSC clock / (ssc divider * 16-bit * stereo). */
200 chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
202 dev_info(&chip->spi->dev,
203 "at73c213: supported bitrate is %lu (%lu divider)\n",
204 chip->bitrate, ssc_div);
209 static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
211 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
212 struct snd_pcm_runtime *runtime = substream->runtime;
214 snd_at73c213_playback_hw.rate_min = chip->bitrate;
215 snd_at73c213_playback_hw.rate_max = chip->bitrate;
216 runtime->hw = snd_at73c213_playback_hw;
217 chip->substream = substream;
222 static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
224 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
225 chip->substream = NULL;
229 static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
230 struct snd_pcm_hw_params *hw_params)
232 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
233 int channels = params_channels(hw_params);
236 val = ssc_readl(chip->ssc->regs, TFMR);
237 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
238 ssc_writel(chip->ssc->regs, TFMR, val);
240 return snd_pcm_lib_malloc_pages(substream,
241 params_buffer_bytes(hw_params));
244 static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
246 return snd_pcm_lib_free_pages(substream);
249 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
251 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
252 struct snd_pcm_runtime *runtime = substream->runtime;
255 block_size = frames_to_bytes(runtime, runtime->period_size);
259 ssc_writel(chip->ssc->regs, PDC_TPR,
260 (long)runtime->dma_addr);
261 ssc_writel(chip->ssc->regs, PDC_TCR,
262 runtime->period_size * runtime->channels);
263 ssc_writel(chip->ssc->regs, PDC_TNPR,
264 (long)runtime->dma_addr + block_size);
265 ssc_writel(chip->ssc->regs, PDC_TNCR,
266 runtime->period_size * runtime->channels);
271 static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
274 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
277 spin_lock(&chip->lock);
280 case SNDRV_PCM_TRIGGER_START:
281 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
282 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
284 case SNDRV_PCM_TRIGGER_STOP:
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);
294 spin_unlock(&chip->lock);
299 static snd_pcm_uframes_t
300 snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
302 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
303 struct snd_pcm_runtime *runtime = substream->runtime;
304 snd_pcm_uframes_t pos;
307 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
308 - (unsigned long)runtime->dma_addr;
310 pos = bytes_to_frames(runtime, bytes);
311 if (pos >= runtime->buffer_size)
312 pos -= runtime->buffer_size;
317 static struct snd_pcm_ops at73c213_playback_ops = {
318 .open = snd_at73c213_pcm_open,
319 .close = snd_at73c213_pcm_close,
320 .ioctl = snd_pcm_lib_ioctl,
321 .hw_params = snd_at73c213_pcm_hw_params,
322 .hw_free = snd_at73c213_pcm_hw_free,
323 .prepare = snd_at73c213_pcm_prepare,
324 .trigger = snd_at73c213_pcm_trigger,
325 .pointer = snd_at73c213_pcm_pointer,
328 static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
333 retval = snd_pcm_new(chip->card, chip->card->shortname,
338 pcm->private_data = chip;
339 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
340 strcpy(pcm->name, "at73c213");
343 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
345 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
346 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
347 64 * 1024, 64 * 1024);
352 static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
354 struct snd_at73c213 *chip = dev_id;
355 struct snd_pcm_runtime *runtime = chip->substream->runtime;
360 int retval = IRQ_NONE;
362 spin_lock(&chip->lock);
364 block_size = frames_to_bytes(runtime, runtime->period_size);
365 status = ssc_readl(chip->ssc->regs, IMR);
367 if (status & SSC_BIT(IMR_ENDTX)) {
369 if (chip->period == runtime->periods)
371 next_period = chip->period + 1;
372 if (next_period == runtime->periods)
375 offset = block_size * next_period;
377 ssc_writel(chip->ssc->regs, PDC_TNPR,
378 (long)runtime->dma_addr + offset);
379 ssc_writel(chip->ssc->regs, PDC_TNCR,
380 runtime->period_size * runtime->channels);
381 retval = IRQ_HANDLED;
384 ssc_readl(chip->ssc->regs, IMR);
385 spin_unlock(&chip->lock);
387 if (status & SSC_BIT(IMR_ENDTX))
388 snd_pcm_period_elapsed(chip->substream);
396 static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
397 struct snd_ctl_elem_value *ucontrol)
399 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
400 int reg = kcontrol->private_value & 0xff;
401 int shift = (kcontrol->private_value >> 8) & 0xff;
402 int mask = (kcontrol->private_value >> 16) & 0xff;
403 int invert = (kcontrol->private_value >> 24) & 0xff;
405 mutex_lock(&chip->mixer_lock);
407 ucontrol->value.integer.value[0] =
408 (chip->reg_image[reg] >> shift) & mask;
411 ucontrol->value.integer.value[0] =
412 mask - ucontrol->value.integer.value[0];
414 mutex_unlock(&chip->mixer_lock);
419 static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
420 struct snd_ctl_elem_value *ucontrol)
422 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
423 int reg = kcontrol->private_value & 0xff;
424 int shift = (kcontrol->private_value >> 8) & 0xff;
425 int mask = (kcontrol->private_value >> 16) & 0xff;
426 int invert = (kcontrol->private_value >> 24) & 0xff;
430 val = (ucontrol->value.integer.value[0] & mask);
435 mutex_lock(&chip->mixer_lock);
437 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
438 change = val != chip->reg_image[reg];
439 retval = snd_at73c213_write_reg(chip, reg, val);
441 mutex_unlock(&chip->mixer_lock);
449 static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
450 struct snd_ctl_elem_info *uinfo)
452 int mask = (kcontrol->private_value >> 24) & 0xff;
455 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
457 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
460 uinfo->value.integer.min = 0;
461 uinfo->value.integer.max = mask;
466 static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
467 struct snd_ctl_elem_value *ucontrol)
469 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
470 int left_reg = kcontrol->private_value & 0xff;
471 int right_reg = (kcontrol->private_value >> 8) & 0xff;
472 int shift_left = (kcontrol->private_value >> 16) & 0x07;
473 int shift_right = (kcontrol->private_value >> 19) & 0x07;
474 int mask = (kcontrol->private_value >> 24) & 0xff;
475 int invert = (kcontrol->private_value >> 22) & 1;
477 mutex_lock(&chip->mixer_lock);
479 ucontrol->value.integer.value[0] =
480 (chip->reg_image[left_reg] >> shift_left) & mask;
481 ucontrol->value.integer.value[1] =
482 (chip->reg_image[right_reg] >> shift_right) & mask;
485 ucontrol->value.integer.value[0] =
486 mask - ucontrol->value.integer.value[0];
487 ucontrol->value.integer.value[1] =
488 mask - ucontrol->value.integer.value[1];
491 mutex_unlock(&chip->mixer_lock);
496 static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
497 struct snd_ctl_elem_value *ucontrol)
499 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
500 int left_reg = kcontrol->private_value & 0xff;
501 int right_reg = (kcontrol->private_value >> 8) & 0xff;
502 int shift_left = (kcontrol->private_value >> 16) & 0x07;
503 int shift_right = (kcontrol->private_value >> 19) & 0x07;
504 int mask = (kcontrol->private_value >> 24) & 0xff;
505 int invert = (kcontrol->private_value >> 22) & 1;
507 unsigned short val1, val2;
509 val1 = ucontrol->value.integer.value[0] & mask;
510 val2 = ucontrol->value.integer.value[1] & mask;
516 val2 <<= shift_right;
518 mutex_lock(&chip->mixer_lock);
520 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
521 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
522 change = val1 != chip->reg_image[left_reg]
523 || val2 != chip->reg_image[right_reg];
524 retval = snd_at73c213_write_reg(chip, left_reg, val1);
526 mutex_unlock(&chip->mixer_lock);
529 retval = snd_at73c213_write_reg(chip, right_reg, val2);
531 mutex_unlock(&chip->mixer_lock);
535 mutex_unlock(&chip->mixer_lock);
543 #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
545 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
546 struct snd_ctl_elem_value *ucontrol)
548 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
549 int reg = kcontrol->private_value & 0xff;
550 int shift = (kcontrol->private_value >> 8) & 0xff;
551 int invert = (kcontrol->private_value >> 24) & 0xff;
553 mutex_lock(&chip->mixer_lock);
555 ucontrol->value.integer.value[0] =
556 (chip->reg_image[reg] >> shift) & 0x01;
559 ucontrol->value.integer.value[0] =
560 0x01 - ucontrol->value.integer.value[0];
562 mutex_unlock(&chip->mixer_lock);
567 static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
568 struct snd_ctl_elem_value *ucontrol)
570 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
571 int reg = kcontrol->private_value & 0xff;
572 int shift = (kcontrol->private_value >> 8) & 0xff;
573 int mask = (kcontrol->private_value >> 16) & 0xff;
574 int invert = (kcontrol->private_value >> 24) & 0xff;
578 if (ucontrol->value.integer.value[0])
587 mutex_lock(&chip->mixer_lock);
589 val |= (chip->reg_image[reg] & ~(mask << shift));
590 change = val != chip->reg_image[reg];
592 retval = snd_at73c213_write_reg(chip, reg, val);
594 mutex_unlock(&chip->mixer_lock);
602 static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
603 struct snd_ctl_elem_info *uinfo)
605 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
607 uinfo->value.integer.min = 0;
608 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
613 static int snd_at73c213_line_capture_volume_info(
614 struct snd_kcontrol *kcontrol,
615 struct snd_ctl_elem_info *uinfo)
617 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
619 /* When inverted will give values 0x10001 => 0. */
620 uinfo->value.integer.min = 14;
621 uinfo->value.integer.max = 31;
626 static int snd_at73c213_aux_capture_volume_info(
627 struct snd_kcontrol *kcontrol,
628 struct snd_ctl_elem_info *uinfo)
630 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
632 /* When inverted will give values 0x10001 => 0. */
633 uinfo->value.integer.min = 14;
634 uinfo->value.integer.max = 31;
639 #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
641 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
644 .info = snd_at73c213_mono_switch_info, \
645 .get = snd_at73c213_mono_switch_get, \
646 .put = snd_at73c213_mono_switch_put, \
647 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
650 #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
652 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
655 .info = snd_at73c213_stereo_info, \
656 .get = snd_at73c213_stereo_get, \
657 .put = snd_at73c213_stereo_put, \
658 .private_value = (left_reg | (right_reg << 8) \
659 | (shift_left << 16) | (shift_right << 19) \
660 | (mask << 24) | (invert << 22)) \
663 static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = {
664 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
665 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
666 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
667 AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
668 AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
671 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
672 .name = "PA Playback Volume",
674 .info = snd_at73c213_pa_volume_info,
675 .get = snd_at73c213_mono_get,
676 .put = snd_at73c213_mono_put,
677 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
678 (0x0f << 16) | (1 << 24),
680 AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
682 AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
684 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
685 .name = "Aux Capture Volume",
687 .info = snd_at73c213_aux_capture_volume_info,
688 .get = snd_at73c213_mono_get,
689 .put = snd_at73c213_mono_put,
690 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
692 AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
695 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
696 .name = "Line Capture Volume",
698 .info = snd_at73c213_line_capture_volume_info,
699 .get = snd_at73c213_stereo_get,
700 .put = snd_at73c213_stereo_put,
701 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
702 | (0x1f << 24) | (1 << 22),
704 AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
707 static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip)
709 struct snd_card *card;
712 if (chip == NULL || chip->pcm == NULL)
717 strcpy(card->mixername, chip->pcm->name);
719 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
720 errval = snd_ctl_add(card,
721 snd_ctl_new1(&snd_at73c213_controls[idx],
730 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
731 struct snd_kcontrol *kctl;
732 kctl = snd_ctl_find_numid(card, idx);
734 snd_ctl_remove(card, kctl);
742 static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip)
745 * Continuous clock output.
746 * Starts on falling TF.
747 * Delay 1 cycle (1 bit).
748 * Periode is 16 bit (16 - 1).
750 ssc_writel(chip->ssc->regs, TCMR,
752 | SSC_BF(TCMR_START, 4)
753 | SSC_BF(TCMR_STTDLY, 1)
754 | SSC_BF(TCMR_PERIOD, 16 - 1));
756 * Data length is 16 bit (16 - 1).
757 * Transmit MSB first.
758 * Transmit 2 words each transfer.
759 * Frame sync length is 16 bit (16 - 1).
760 * Frame starts on negative pulse.
762 ssc_writel(chip->ssc->regs, TFMR,
763 SSC_BF(TFMR_DATLEN, 16 - 1)
765 | SSC_BF(TFMR_DATNB, 1)
766 | SSC_BF(TFMR_FSLEN, 16 - 1)
767 | SSC_BF(TFMR_FSOS, 1));
772 static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip)
775 unsigned char dac_ctrl = 0;
777 retval = snd_at73c213_set_bitrate(chip);
781 /* Enable DAC master clock. */
782 clk_enable(chip->board->dac_clk);
784 /* Initialize at73c213 on SPI bus. */
785 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
789 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
793 /* Precharge everything. */
794 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
797 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
800 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
801 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
807 /* Stop precharging PA. */
808 retval = snd_at73c213_write_reg(chip, PA_CTRL,
809 (1<<PA_CTRL_APALP) | 0x0f);
815 /* Stop precharging DAC, turn on master power. */
816 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
823 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
824 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
826 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
831 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
834 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
837 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
840 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
843 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
846 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
849 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
853 /* Enable I2S device, i.e. clock output. */
854 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
859 clk_disable(chip->board->dac_clk);
864 static int snd_at73c213_dev_free(struct snd_device *device)
866 struct snd_at73c213 *chip = device->device_data;
868 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
869 if (chip->irq >= 0) {
870 free_irq(chip->irq, chip);
877 static int __devinit snd_at73c213_dev_init(struct snd_card *card,
878 struct spi_device *spi)
880 static struct snd_device_ops ops = {
881 .dev_free = snd_at73c213_dev_free,
883 struct snd_at73c213 *chip = get_chip(card);
886 irq = chip->ssc->irq;
890 spin_lock_init(&chip->lock);
891 mutex_init(&chip->mixer_lock);
895 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
897 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
902 memcpy(&chip->reg_image, &snd_at73c213_original_image,
903 sizeof(snd_at73c213_original_image));
905 retval = snd_at73c213_ssc_init(chip);
909 retval = snd_at73c213_chip_init(chip);
913 retval = snd_at73c213_pcm_new(chip, 0);
917 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
921 retval = snd_at73c213_mixer(chip);
925 snd_card_set_dev(card, &spi->dev);
930 snd_device_free(card, chip);
932 free_irq(chip->irq, chip);
938 static int __devinit snd_at73c213_probe(struct spi_device *spi)
940 struct snd_card *card;
941 struct snd_at73c213 *chip;
942 struct at73c213_board_info *board;
946 board = spi->dev.platform_data;
948 dev_dbg(&spi->dev, "no platform_data\n");
952 if (!board->dac_clk) {
953 dev_dbg(&spi->dev, "no DAC clk\n");
957 if (IS_ERR(board->dac_clk)) {
958 dev_dbg(&spi->dev, "no DAC clk\n");
959 return PTR_ERR(board->dac_clk);
964 /* Allocate "card" using some unused identifiers. */
965 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
966 card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213));
970 chip = card->private_data;
974 chip->ssc = ssc_request(board->ssc_id);
975 if (IS_ERR(chip->ssc)) {
976 dev_dbg(&spi->dev, "could not get ssc%d device\n",
978 retval = PTR_ERR(chip->ssc);
982 retval = snd_at73c213_dev_init(card, spi);
986 strcpy(card->driver, "at73c213");
987 strcpy(card->shortname, board->shortname);
988 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
990 retval = snd_card_register(card);
994 dev_set_drvdata(&spi->dev, card);
1001 snd_card_free(card);
1006 static int __devexit snd_at73c213_remove(struct spi_device *spi)
1008 struct snd_card *card = dev_get_drvdata(&spi->dev);
1009 struct snd_at73c213 *chip = card->private_data;
1012 /* Stop playback. */
1013 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1016 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1019 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1022 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1025 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1028 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1031 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1034 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1039 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1040 chip->reg_image[PA_CTRL] | 0x0f);
1044 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1045 (1 << PA_CTRL_APALP) | 0x0f);
1049 /* Turn off external DAC. */
1050 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1054 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1058 /* Turn off master power. */
1059 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1064 /* Stop DAC master clock. */
1065 clk_disable(chip->board->dac_clk);
1067 ssc_free(chip->ssc);
1068 snd_card_free(card);
1069 dev_set_drvdata(&spi->dev, NULL);
1075 static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg)
1077 struct snd_card *card = dev_get_drvdata(&spi->dev);
1078 struct snd_at73c213 *chip = card->private_data;
1080 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1081 clk_disable(chip->board->dac_clk);
1086 static int snd_at73c213_resume(struct spi_device *spi)
1088 struct snd_card *card = dev_get_drvdata(&spi->dev);
1089 struct snd_at73c213 *chip = card->private_data;
1091 clk_enable(chip->board->dac_clk);
1092 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1097 #define snd_at73c213_suspend NULL
1098 #define snd_at73c213_resume NULL
1101 static struct spi_driver at73c213_driver = {
1105 .probe = snd_at73c213_probe,
1106 .suspend = snd_at73c213_suspend,
1107 .resume = snd_at73c213_resume,
1108 .remove = __devexit_p(snd_at73c213_remove),
1111 static int __init at73c213_init(void)
1113 return spi_register_driver(&at73c213_driver);
1115 module_init(at73c213_init);
1117 static void __exit at73c213_exit(void)
1119 spi_unregister_driver(&at73c213_driver);
1121 module_exit(at73c213_exit);
1123 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
1124 MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1125 MODULE_LICENSE("GPL");