1 // SPDX-License-Identifier: GPL-2.0+
3 // Freescale ALSA SoC Digital Audio Interface (SAI) driver.
5 // Copyright 2012-2015 Freescale Semiconductor, Inc.
8 #include <linux/delay.h>
9 #include <linux/dmaengine.h>
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/of_device.h>
13 #include <linux/pinctrl/consumer.h>
14 #include <linux/pm_qos.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/regmap.h>
17 #include <linux/slab.h>
18 #include <linux/time.h>
19 #include <sound/core.h>
20 #include <sound/dmaengine_pcm.h>
21 #include <sound/pcm_params.h>
22 #include <linux/mfd/syscon.h>
23 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
26 #include "fsl_utils.h"
29 #define FSL_SAI_FLAGS (FSL_SAI_CSR_SEIE |\
32 static const unsigned int fsl_sai_rates[] = {
33 8000, 11025, 12000, 16000, 22050,
34 24000, 32000, 44100, 48000, 64000,
35 88200, 96000, 176400, 192000, 352800,
36 384000, 705600, 768000, 1411200, 2822400,
39 static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = {
40 .count = ARRAY_SIZE(fsl_sai_rates),
41 .list = fsl_sai_rates,
45 * fsl_sai_dir_is_synced - Check if stream is synced by the opposite stream
47 * SAI supports synchronous mode using bit/frame clocks of either Transmitter's
48 * or Receiver's for both streams. This function is used to check if clocks of
49 * the stream's are synced by the opposite stream.
52 * @dir: stream direction
54 static inline bool fsl_sai_dir_is_synced(struct fsl_sai *sai, int dir)
56 int adir = (dir == TX) ? RX : TX;
58 /* current dir in async mode while opposite dir in sync mode */
59 return !sai->synchronous[dir] && sai->synchronous[adir];
62 static struct pinctrl_state *fsl_sai_get_pins_state(struct fsl_sai *sai, u32 bclk)
64 struct pinctrl_state *state = NULL;
66 if (sai->is_pdm_mode) {
67 /* DSD512@44.1kHz, DSD512@48kHz */
69 state = pinctrl_lookup_state(sai->pinctrl, "dsd512");
71 /* Get default DSD state */
72 if (IS_ERR_OR_NULL(state))
73 state = pinctrl_lookup_state(sai->pinctrl, "dsd");
75 /* 706k32b2c, 768k32b2c, etc */
77 state = pinctrl_lookup_state(sai->pinctrl, "pcm_b2m");
80 /* Get default state */
81 if (IS_ERR_OR_NULL(state))
82 state = pinctrl_lookup_state(sai->pinctrl, "default");
87 static irqreturn_t fsl_sai_isr(int irq, void *devid)
89 struct fsl_sai *sai = (struct fsl_sai *)devid;
90 unsigned int ofs = sai->soc_data->reg_offset;
91 struct device *dev = &sai->pdev->dev;
92 u32 flags, xcsr, mask;
93 irqreturn_t iret = IRQ_NONE;
96 * Both IRQ status bits and IRQ mask bits are in the xCSR but
97 * different shifts. And we here create a mask only for those
98 * IRQs that we activated.
100 mask = (FSL_SAI_FLAGS >> FSL_SAI_CSR_xIE_SHIFT) << FSL_SAI_CSR_xF_SHIFT;
103 regmap_read(sai->regmap, FSL_SAI_TCSR(ofs), &xcsr);
111 if (flags & FSL_SAI_CSR_WSF)
112 dev_dbg(dev, "isr: Start of Tx word detected\n");
114 if (flags & FSL_SAI_CSR_SEF)
115 dev_dbg(dev, "isr: Tx Frame sync error detected\n");
117 if (flags & FSL_SAI_CSR_FEF)
118 dev_dbg(dev, "isr: Transmit underrun detected\n");
120 if (flags & FSL_SAI_CSR_FWF)
121 dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n");
123 if (flags & FSL_SAI_CSR_FRF)
124 dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n");
126 flags &= FSL_SAI_CSR_xF_W_MASK;
127 xcsr &= ~FSL_SAI_CSR_xF_MASK;
130 regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), flags | xcsr);
134 regmap_read(sai->regmap, FSL_SAI_RCSR(ofs), &xcsr);
142 if (flags & FSL_SAI_CSR_WSF)
143 dev_dbg(dev, "isr: Start of Rx word detected\n");
145 if (flags & FSL_SAI_CSR_SEF)
146 dev_dbg(dev, "isr: Rx Frame sync error detected\n");
148 if (flags & FSL_SAI_CSR_FEF)
149 dev_dbg(dev, "isr: Receive overflow detected\n");
151 if (flags & FSL_SAI_CSR_FWF)
152 dev_dbg(dev, "isr: Enabled receive FIFO is full\n");
154 if (flags & FSL_SAI_CSR_FRF)
155 dev_dbg(dev, "isr: Receive FIFO watermark has been reached\n");
157 flags &= FSL_SAI_CSR_xF_W_MASK;
158 xcsr &= ~FSL_SAI_CSR_xF_MASK;
161 regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), flags | xcsr);
167 static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
168 u32 rx_mask, int slots, int slot_width)
170 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
173 sai->slot_width = slot_width;
178 static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai,
181 struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
183 sai->bclk_ratio = ratio;
188 static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
189 int clk_id, unsigned int freq, bool tx)
191 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
192 unsigned int ofs = sai->soc_data->reg_offset;
196 case FSL_SAI_CLK_BUS:
197 val_cr2 |= FSL_SAI_CR2_MSEL_BUS;
199 case FSL_SAI_CLK_MAST1:
200 val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1;
202 case FSL_SAI_CLK_MAST2:
203 val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2;
205 case FSL_SAI_CLK_MAST3:
206 val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3;
212 regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
213 FSL_SAI_CR2_MSEL_MASK, val_cr2);
218 static int fsl_sai_set_mclk_rate(struct snd_soc_dai *dai, int clk_id, unsigned int freq)
220 struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
223 fsl_asoc_reparent_pll_clocks(dai->dev, sai->mclk_clk[clk_id],
224 sai->pll8k_clk, sai->pll11k_clk, freq);
226 ret = clk_set_rate(sai->mclk_clk[clk_id], freq);
228 dev_err(dai->dev, "failed to set clock rate (%u): %d\n", freq, ret);
233 static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
234 int clk_id, unsigned int freq, int dir)
236 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
239 if (dir == SND_SOC_CLOCK_IN)
242 if (freq > 0 && clk_id != FSL_SAI_CLK_BUS) {
243 if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
244 dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id);
248 if (IS_ERR_OR_NULL(sai->mclk_clk[clk_id])) {
249 dev_err(cpu_dai->dev, "Unassigned clock: %d\n", clk_id);
253 if (sai->mclk_streams == 0) {
254 ret = fsl_sai_set_mclk_rate(cpu_dai, clk_id, freq);
260 ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, true);
262 dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret);
266 ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, false);
268 dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret);
273 static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
274 unsigned int fmt, bool tx)
276 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
277 unsigned int ofs = sai->soc_data->reg_offset;
278 u32 val_cr2 = 0, val_cr4 = 0;
280 if (!sai->is_lsb_first)
281 val_cr4 |= FSL_SAI_CR4_MF;
283 sai->is_pdm_mode = false;
285 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
286 case SND_SOC_DAIFMT_I2S:
288 * Frame low, 1clk before data, one word length for frame sync,
289 * frame sync starts one serial clock cycle earlier,
290 * that is, together with the last bit of the previous
293 val_cr2 |= FSL_SAI_CR2_BCP;
294 val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP;
296 case SND_SOC_DAIFMT_LEFT_J:
298 * Frame high, one word length for frame sync,
299 * frame sync asserts with the first bit of the frame.
301 val_cr2 |= FSL_SAI_CR2_BCP;
303 case SND_SOC_DAIFMT_DSP_A:
305 * Frame high, 1clk before data, one bit for frame sync,
306 * frame sync starts one serial clock cycle earlier,
307 * that is, together with the last bit of the previous
310 val_cr2 |= FSL_SAI_CR2_BCP;
311 val_cr4 |= FSL_SAI_CR4_FSE;
312 sai->is_dsp_mode = true;
314 case SND_SOC_DAIFMT_DSP_B:
316 * Frame high, one bit for frame sync,
317 * frame sync asserts with the first bit of the frame.
319 val_cr2 |= FSL_SAI_CR2_BCP;
320 sai->is_dsp_mode = true;
322 case SND_SOC_DAIFMT_PDM:
323 val_cr2 |= FSL_SAI_CR2_BCP;
324 val_cr4 &= ~FSL_SAI_CR4_MF;
325 sai->is_pdm_mode = true;
327 case SND_SOC_DAIFMT_RIGHT_J:
333 /* DAI clock inversion */
334 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
335 case SND_SOC_DAIFMT_IB_IF:
336 /* Invert both clocks */
337 val_cr2 ^= FSL_SAI_CR2_BCP;
338 val_cr4 ^= FSL_SAI_CR4_FSP;
340 case SND_SOC_DAIFMT_IB_NF:
341 /* Invert bit clock */
342 val_cr2 ^= FSL_SAI_CR2_BCP;
344 case SND_SOC_DAIFMT_NB_IF:
345 /* Invert frame clock */
346 val_cr4 ^= FSL_SAI_CR4_FSP;
348 case SND_SOC_DAIFMT_NB_NF:
349 /* Nothing to do for both normal cases */
355 /* DAI clock provider masks */
356 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
357 case SND_SOC_DAIFMT_BP_FP:
358 val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
359 val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
360 sai->is_consumer_mode = false;
362 case SND_SOC_DAIFMT_BC_FC:
363 sai->is_consumer_mode = true;
365 case SND_SOC_DAIFMT_BP_FC:
366 val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
367 sai->is_consumer_mode = false;
369 case SND_SOC_DAIFMT_BC_FP:
370 val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
371 sai->is_consumer_mode = true;
377 regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
378 FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2);
379 regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
380 FSL_SAI_CR4_MF | FSL_SAI_CR4_FSE |
381 FSL_SAI_CR4_FSP | FSL_SAI_CR4_FSD_MSTR, val_cr4);
386 static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
390 ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, true);
392 dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret);
396 ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, false);
398 dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret);
403 static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
405 struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
406 unsigned int reg, ofs = sai->soc_data->reg_offset;
407 unsigned long clk_rate;
408 u32 savediv = 0, ratio, bestdiff = freq;
409 int adir = tx ? RX : TX;
410 int dir = tx ? TX : RX;
412 bool support_1_1_ratio = sai->verid.version >= 0x0301;
414 /* Don't apply to consumer mode */
415 if (sai->is_consumer_mode)
419 * There is no point in polling MCLK0 if it is identical to MCLK1.
420 * And given that MQS use case has to use MCLK1 though two clocks
421 * are the same, we simply skip MCLK0 and start to find from MCLK1.
423 id = sai->soc_data->mclk0_is_mclk1 ? 1 : 0;
425 for (; id < FSL_SAI_MCLK_MAX; id++) {
428 clk_rate = clk_get_rate(sai->mclk_clk[id]);
432 ratio = DIV_ROUND_CLOSEST(clk_rate, freq);
433 if (!ratio || ratio > 512)
435 if (ratio == 1 && !support_1_1_ratio)
437 if ((ratio & 1) && ratio > 1)
440 diff = abs((long)clk_rate - ratio * freq);
443 * Drop the source that can not be
444 * divided into the required rate.
446 if (diff != 0 && clk_rate / diff < 1000)
450 "ratio %d for freq %dHz based on clock %ldHz\n",
451 ratio, freq, clk_rate);
454 if (diff < bestdiff) {
456 sai->mclk_id[tx] = id;
465 dev_err(dai->dev, "failed to derive required %cx rate: %d\n",
466 tx ? 'T' : 'R', freq);
470 dev_dbg(dai->dev, "best fit: clock id=%d, div=%d, deviation =%d\n",
471 sai->mclk_id[tx], savediv, bestdiff);
474 * 1) For Asynchronous mode, we must set RCR2 register for capture, and
475 * set TCR2 register for playback.
476 * 2) For Tx sync with Rx clock, we must set RCR2 register for playback
478 * 3) For Rx sync with Tx clock, we must set TCR2 register for playback
480 * 4) For Tx and Rx are both Synchronous with another SAI, we just
483 if (fsl_sai_dir_is_synced(sai, adir))
484 reg = FSL_SAI_xCR2(!tx, ofs);
485 else if (!sai->synchronous[dir])
486 reg = FSL_SAI_xCR2(tx, ofs);
490 regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_MSEL_MASK,
491 FSL_SAI_CR2_MSEL(sai->mclk_id[tx]));
494 regmap_update_bits(sai->regmap, reg,
495 FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP,
498 regmap_update_bits(sai->regmap, reg,
499 FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP,
502 if (sai->soc_data->max_register >= FSL_SAI_MCTL) {
503 /* SAI is in master mode at this point, so enable MCLK */
504 regmap_update_bits(sai->regmap, FSL_SAI_MCTL,
505 FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN);
511 static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
512 struct snd_pcm_hw_params *params,
513 struct snd_soc_dai *cpu_dai)
515 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
516 unsigned int ofs = sai->soc_data->reg_offset;
517 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
518 unsigned int channels = params_channels(params);
519 struct snd_dmaengine_dai_dma_data *dma_params;
520 struct fsl_sai_dl_cfg *dl_cfg = sai->dl_cfg;
521 u32 word_width = params_width(params);
522 int trce_mask = 0, dl_cfg_idx = 0;
523 int dl_cfg_cnt = sai->dl_cfg_cnt;
524 u32 dl_type = FSL_SAI_DL_I2S;
525 u32 val_cr4 = 0, val_cr5 = 0;
526 u32 slots = (channels == 1) ? 2 : channels;
527 u32 slot_width = word_width;
528 int adir = tx ? RX : TX;
534 slot_width = sai->slot_width;
538 else if (sai->bclk_ratio)
539 slots = sai->bclk_ratio / slot_width;
541 pins = DIV_ROUND_UP(channels, slots);
544 * PDM mode, channels are independent
545 * each channels are on one dataline/FIFO.
547 if (sai->is_pdm_mode) {
549 dl_type = FSL_SAI_DL_PDM;
552 for (i = 0; i < dl_cfg_cnt; i++) {
553 if (dl_cfg[i].type == dl_type && dl_cfg[i].pins[tx] == pins) {
559 if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) < pins) {
560 dev_err(cpu_dai->dev, "channel not supported\n");
564 bclk = params_rate(params) * (sai->bclk_ratio ? sai->bclk_ratio : slots * slot_width);
566 if (!IS_ERR_OR_NULL(sai->pinctrl)) {
567 sai->pins_state = fsl_sai_get_pins_state(sai, bclk);
568 if (!IS_ERR_OR_NULL(sai->pins_state)) {
569 ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
571 dev_err(cpu_dai->dev, "failed to set proper pins state: %d\n", ret);
577 if (!sai->is_consumer_mode) {
578 ret = fsl_sai_set_bclk(cpu_dai, tx, bclk);
582 /* Do not enable the clock if it is already enabled */
583 if (!(sai->mclk_streams & BIT(substream->stream))) {
584 ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[tx]]);
588 sai->mclk_streams |= BIT(substream->stream);
592 if (!sai->is_dsp_mode && !sai->is_pdm_mode)
593 val_cr4 |= FSL_SAI_CR4_SYWD(slot_width);
595 val_cr5 |= FSL_SAI_CR5_WNW(slot_width);
596 val_cr5 |= FSL_SAI_CR5_W0W(slot_width);
598 if (sai->is_lsb_first || sai->is_pdm_mode)
599 val_cr5 |= FSL_SAI_CR5_FBT(0);
601 val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1);
603 val_cr4 |= FSL_SAI_CR4_FRSZ(slots);
605 /* Set to output mode to avoid tri-stated data pins */
607 val_cr4 |= FSL_SAI_CR4_CHMOD;
610 * For SAI provider mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will
611 * generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4),
612 * RCR5(TCR5) for playback(capture), or there will be sync error.
615 if (!sai->is_consumer_mode && fsl_sai_dir_is_synced(sai, adir)) {
616 regmap_update_bits(sai->regmap, FSL_SAI_xCR4(!tx, ofs),
617 FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK |
618 FSL_SAI_CR4_CHMOD_MASK,
620 regmap_update_bits(sai->regmap, FSL_SAI_xCR5(!tx, ofs),
621 FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
622 FSL_SAI_CR5_FBT_MASK, val_cr5);
626 * Combine mode has limation:
627 * - Can't used for singel dataline/FIFO case except the FIFO0
628 * - Can't used for multi dataline/FIFO case except the enabled FIFOs
629 * are successive and start from FIFO0
631 * So for common usage, all multi fifo case disable the combine mode.
633 if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) <= 1 || sai->is_multi_fifo_dma)
634 regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
635 FSL_SAI_CR4_FCOMB_MASK, 0);
637 regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
638 FSL_SAI_CR4_FCOMB_MASK, FSL_SAI_CR4_FCOMB_SOFT);
640 dma_params = tx ? &sai->dma_params_tx : &sai->dma_params_rx;
641 dma_params->addr = sai->res->start + FSL_SAI_xDR0(tx) +
642 dl_cfg[dl_cfg_idx].start_off[tx] * 0x4;
644 if (sai->is_multi_fifo_dma) {
645 sai->audio_config[tx].words_per_fifo = min(slots, channels);
647 sai->audio_config[tx].n_fifos_dst = pins;
648 sai->audio_config[tx].stride_fifos_dst = dl_cfg[dl_cfg_idx].next_off[tx];
650 sai->audio_config[tx].n_fifos_src = pins;
651 sai->audio_config[tx].stride_fifos_src = dl_cfg[dl_cfg_idx].next_off[tx];
653 dma_params->maxburst = sai->audio_config[tx].words_per_fifo * pins;
654 dma_params->peripheral_config = &sai->audio_config[tx];
655 dma_params->peripheral_size = sizeof(sai->audio_config[tx]);
657 watermark = tx ? (sai->soc_data->fifo_depth - dma_params->maxburst) :
658 (dma_params->maxburst - 1);
659 regmap_update_bits(sai->regmap, FSL_SAI_xCR1(tx, ofs),
660 FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
664 /* Find a proper tcre setting */
665 for (i = 0; i < sai->soc_data->pins; i++) {
666 trce_mask = (1 << (i + 1)) - 1;
667 if (hweight8(dl_cfg[dl_cfg_idx].mask[tx] & trce_mask) == pins)
671 regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
672 FSL_SAI_CR3_TRCE_MASK,
673 FSL_SAI_CR3_TRCE((dl_cfg[dl_cfg_idx].mask[tx] & trce_mask)));
675 regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
676 FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK |
677 FSL_SAI_CR4_CHMOD_MASK,
679 regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx, ofs),
680 FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
681 FSL_SAI_CR5_FBT_MASK, val_cr5);
682 regmap_write(sai->regmap, FSL_SAI_xMR(tx),
683 ~0UL - ((1 << min(channels, slots)) - 1));
688 static int fsl_sai_hw_free(struct snd_pcm_substream *substream,
689 struct snd_soc_dai *cpu_dai)
691 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
692 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
693 unsigned int ofs = sai->soc_data->reg_offset;
695 regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
696 FSL_SAI_CR3_TRCE_MASK, 0);
698 if (!sai->is_consumer_mode &&
699 sai->mclk_streams & BIT(substream->stream)) {
700 clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[tx]]);
701 sai->mclk_streams &= ~BIT(substream->stream);
707 static void fsl_sai_config_disable(struct fsl_sai *sai, int dir)
709 unsigned int ofs = sai->soc_data->reg_offset;
711 u32 xcsr, count = 100;
713 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
714 FSL_SAI_CSR_TERE, 0);
716 /* TERE will remain set till the end of current frame */
719 regmap_read(sai->regmap, FSL_SAI_xCSR(tx, ofs), &xcsr);
720 } while (--count && xcsr & FSL_SAI_CSR_TERE);
722 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
723 FSL_SAI_CSR_FR, FSL_SAI_CSR_FR);
726 * For sai master mode, after several open/close sai,
727 * there will be no frame clock, and can't recover
728 * anymore. Add software reset to fix this issue.
729 * This is a hardware bug, and will be fix in the
732 if (!sai->is_consumer_mode) {
734 regmap_write(sai->regmap, FSL_SAI_xCSR(tx, ofs), FSL_SAI_CSR_SR);
735 /* Clear SR bit to finish the reset */
736 regmap_write(sai->regmap, FSL_SAI_xCSR(tx, ofs), 0);
740 static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
741 struct snd_soc_dai *cpu_dai)
743 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
744 unsigned int ofs = sai->soc_data->reg_offset;
746 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
747 int adir = tx ? RX : TX;
748 int dir = tx ? TX : RX;
752 * Asynchronous mode: Clear SYNC for both Tx and Rx.
753 * Rx sync with Tx clocks: Clear SYNC for Tx, set it for Rx.
754 * Tx sync with Rx clocks: Clear SYNC for Rx, set it for Tx.
756 regmap_update_bits(sai->regmap, FSL_SAI_TCR2(ofs), FSL_SAI_CR2_SYNC,
757 sai->synchronous[TX] ? FSL_SAI_CR2_SYNC : 0);
758 regmap_update_bits(sai->regmap, FSL_SAI_RCR2(ofs), FSL_SAI_CR2_SYNC,
759 sai->synchronous[RX] ? FSL_SAI_CR2_SYNC : 0);
762 * It is recommended that the transmitter is the last enabled
763 * and the first disabled.
766 case SNDRV_PCM_TRIGGER_START:
767 case SNDRV_PCM_TRIGGER_RESUME:
768 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
769 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
770 FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
772 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
773 FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
775 * Enable the opposite direction for synchronous mode
776 * 1. Tx sync with Rx: only set RE for Rx; set TE & RE for Tx
777 * 2. Rx sync with Tx: only set TE for Tx; set RE & TE for Rx
779 * RM recommends to enable RE after TE for case 1 and to enable
780 * TE after RE for case 2, but we here may not always guarantee
781 * that happens: "arecord 1.wav; aplay 2.wav" in case 1 enables
782 * TE after RE, which is against what RM recommends but should
783 * be safe to do, judging by years of testing results.
785 if (fsl_sai_dir_is_synced(sai, adir))
786 regmap_update_bits(sai->regmap, FSL_SAI_xCSR((!tx), ofs),
787 FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
789 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
790 FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS);
792 case SNDRV_PCM_TRIGGER_STOP:
793 case SNDRV_PCM_TRIGGER_SUSPEND:
794 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
795 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
796 FSL_SAI_CSR_FRDE, 0);
797 regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
798 FSL_SAI_CSR_xIE_MASK, 0);
800 /* Check if the opposite FRDE is also disabled */
801 regmap_read(sai->regmap, FSL_SAI_xCSR(!tx, ofs), &xcsr);
804 * If opposite stream provides clocks for synchronous mode and
805 * it is inactive, disable it before disabling the current one
807 if (fsl_sai_dir_is_synced(sai, adir) && !(xcsr & FSL_SAI_CSR_FRDE))
808 fsl_sai_config_disable(sai, adir);
811 * Disable current stream if either of:
812 * 1. current stream doesn't provide clocks for synchronous mode
813 * 2. current stream provides clocks for synchronous mode but no
814 * more stream is active.
816 if (!fsl_sai_dir_is_synced(sai, dir) || !(xcsr & FSL_SAI_CSR_FRDE))
817 fsl_sai_config_disable(sai, dir);
827 static int fsl_sai_startup(struct snd_pcm_substream *substream,
828 struct snd_soc_dai *cpu_dai)
830 struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
831 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
835 * EDMA controller needs period size to be a multiple of
838 if (sai->soc_data->use_edma)
839 snd_pcm_hw_constraint_step(substream->runtime, 0,
840 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
841 tx ? sai->dma_params_tx.maxburst :
842 sai->dma_params_rx.maxburst);
844 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
845 SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints);
850 static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
851 .set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
852 .set_sysclk = fsl_sai_set_dai_sysclk,
853 .set_fmt = fsl_sai_set_dai_fmt,
854 .set_tdm_slot = fsl_sai_set_dai_tdm_slot,
855 .hw_params = fsl_sai_hw_params,
856 .hw_free = fsl_sai_hw_free,
857 .trigger = fsl_sai_trigger,
858 .startup = fsl_sai_startup,
861 static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai)
863 struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
864 unsigned int ofs = sai->soc_data->reg_offset;
866 /* Software Reset for both Tx and Rx */
867 regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR);
868 regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR);
869 /* Clear SR bit to finish the reset */
870 regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), 0);
871 regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), 0);
873 regmap_update_bits(sai->regmap, FSL_SAI_TCR1(ofs),
874 FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
875 sai->soc_data->fifo_depth - FSL_SAI_MAXBURST_TX);
876 regmap_update_bits(sai->regmap, FSL_SAI_RCR1(ofs),
877 FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
878 FSL_SAI_MAXBURST_RX - 1);
880 snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx,
881 &sai->dma_params_rx);
886 static int fsl_sai_dai_resume(struct snd_soc_component *component)
888 struct fsl_sai *sai = snd_soc_component_get_drvdata(component);
889 struct device *dev = &sai->pdev->dev;
892 if (!IS_ERR_OR_NULL(sai->pinctrl) && !IS_ERR_OR_NULL(sai->pins_state)) {
893 ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
895 dev_err(dev, "failed to set proper pins state: %d\n", ret);
903 static struct snd_soc_dai_driver fsl_sai_dai_template = {
904 .probe = fsl_sai_dai_probe,
906 .stream_name = "CPU-Playback",
911 .rates = SNDRV_PCM_RATE_KNOT,
912 .formats = FSL_SAI_FORMATS,
915 .stream_name = "CPU-Capture",
920 .rates = SNDRV_PCM_RATE_KNOT,
921 .formats = FSL_SAI_FORMATS,
923 .ops = &fsl_sai_pcm_dai_ops,
926 static const struct snd_soc_component_driver fsl_component = {
928 .resume = fsl_sai_dai_resume,
929 .legacy_dai_naming = 1,
932 static struct reg_default fsl_sai_reg_defaults_ofs0[] = {
933 {FSL_SAI_TCR1(0), 0},
934 {FSL_SAI_TCR2(0), 0},
935 {FSL_SAI_TCR3(0), 0},
936 {FSL_SAI_TCR4(0), 0},
937 {FSL_SAI_TCR5(0), 0},
947 {FSL_SAI_RCR1(0), 0},
948 {FSL_SAI_RCR2(0), 0},
949 {FSL_SAI_RCR3(0), 0},
950 {FSL_SAI_RCR4(0), 0},
951 {FSL_SAI_RCR5(0), 0},
955 static struct reg_default fsl_sai_reg_defaults_ofs8[] = {
956 {FSL_SAI_TCR1(8), 0},
957 {FSL_SAI_TCR2(8), 0},
958 {FSL_SAI_TCR3(8), 0},
959 {FSL_SAI_TCR4(8), 0},
960 {FSL_SAI_TCR5(8), 0},
970 {FSL_SAI_RCR1(8), 0},
971 {FSL_SAI_RCR2(8), 0},
972 {FSL_SAI_RCR3(8), 0},
973 {FSL_SAI_RCR4(8), 0},
974 {FSL_SAI_RCR5(8), 0},
980 static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg)
982 struct fsl_sai *sai = dev_get_drvdata(dev);
983 unsigned int ofs = sai->soc_data->reg_offset;
985 if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs))
988 if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs))
1036 static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg)
1038 struct fsl_sai *sai = dev_get_drvdata(dev);
1039 unsigned int ofs = sai->soc_data->reg_offset;
1041 if (reg == FSL_SAI_TCSR(ofs) || reg == FSL_SAI_RCSR(ofs))
1044 /* Set VERID and PARAM be volatile for reading value in probe */
1045 if (ofs == 8 && (reg == FSL_SAI_VERID || reg == FSL_SAI_PARAM))
1079 static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg)
1081 struct fsl_sai *sai = dev_get_drvdata(dev);
1082 unsigned int ofs = sai->soc_data->reg_offset;
1084 if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs))
1087 if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs))
1111 static struct regmap_config fsl_sai_regmap_config = {
1117 .max_register = FSL_SAI_RMR,
1118 .reg_defaults = fsl_sai_reg_defaults_ofs0,
1119 .num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults_ofs0),
1120 .readable_reg = fsl_sai_readable_reg,
1121 .volatile_reg = fsl_sai_volatile_reg,
1122 .writeable_reg = fsl_sai_writeable_reg,
1123 .cache_type = REGCACHE_FLAT,
1126 static int fsl_sai_check_version(struct device *dev)
1128 struct fsl_sai *sai = dev_get_drvdata(dev);
1129 unsigned char ofs = sai->soc_data->reg_offset;
1133 if (FSL_SAI_TCSR(ofs) == FSL_SAI_VERID)
1136 ret = regmap_read(sai->regmap, FSL_SAI_VERID, &val);
1140 dev_dbg(dev, "VERID: 0x%016X\n", val);
1142 sai->verid.version = val &
1143 (FSL_SAI_VERID_MAJOR_MASK | FSL_SAI_VERID_MINOR_MASK);
1144 sai->verid.feature = val & FSL_SAI_VERID_FEATURE_MASK;
1146 ret = regmap_read(sai->regmap, FSL_SAI_PARAM, &val);
1150 dev_dbg(dev, "PARAM: 0x%016X\n", val);
1152 /* Max slots per frame, power of 2 */
1153 sai->param.slot_num = 1 <<
1154 ((val & FSL_SAI_PARAM_SPF_MASK) >> FSL_SAI_PARAM_SPF_SHIFT);
1156 /* Words per fifo, power of 2 */
1157 sai->param.fifo_depth = 1 <<
1158 ((val & FSL_SAI_PARAM_WPF_MASK) >> FSL_SAI_PARAM_WPF_SHIFT);
1160 /* Number of datalines implemented */
1161 sai->param.dataline = val & FSL_SAI_PARAM_DLN_MASK;
1167 * Calculate the offset between first two datalines, don't
1168 * different offset in one case.
1170 static unsigned int fsl_sai_calc_dl_off(unsigned long dl_mask)
1172 int fbidx, nbidx, offset;
1174 fbidx = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
1175 nbidx = find_next_bit(&dl_mask, FSL_SAI_DL_NUM, fbidx + 1);
1176 offset = nbidx - fbidx - 1;
1178 return (offset < 0 || offset >= (FSL_SAI_DL_NUM - 1) ? 0 : offset);
1182 * read the fsl,dataline property from dts file.
1183 * It has 3 value for each configuration, first one means the type:
1184 * I2S(1) or PDM(2), second one is dataline mask for 'rx', third one is
1185 * dataline mask for 'tx'. for example
1187 * fsl,dataline = <1 0xff 0xff 2 0xff 0x11>,
1189 * It means I2S type rx mask is 0xff, tx mask is 0xff, PDM type
1190 * rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled).
1193 static int fsl_sai_read_dlcfg(struct fsl_sai *sai)
1195 struct platform_device *pdev = sai->pdev;
1196 struct device_node *np = pdev->dev.of_node;
1197 struct device *dev = &pdev->dev;
1198 int ret, elems, i, index, num_cfg;
1199 char *propname = "fsl,dataline";
1200 struct fsl_sai_dl_cfg *cfg;
1201 unsigned long dl_mask;
1202 unsigned int soc_dl;
1205 elems = of_property_count_u32_elems(np, propname);
1209 } else if (elems % 3) {
1210 dev_err(dev, "Number of elements must be divisible to 3.\n");
1214 num_cfg = elems / 3;
1215 /* Add one more for default value */
1216 cfg = devm_kzalloc(&pdev->dev, (num_cfg + 1) * sizeof(*cfg), GFP_KERNEL);
1220 /* Consider default value "0 0xFF 0xFF" if property is missing */
1221 soc_dl = BIT(sai->soc_data->pins) - 1;
1222 cfg[0].type = FSL_SAI_DL_DEFAULT;
1223 cfg[0].pins[0] = sai->soc_data->pins;
1224 cfg[0].mask[0] = soc_dl;
1225 cfg[0].start_off[0] = 0;
1226 cfg[0].next_off[0] = 0;
1228 cfg[0].pins[1] = sai->soc_data->pins;
1229 cfg[0].mask[1] = soc_dl;
1230 cfg[0].start_off[1] = 0;
1231 cfg[0].next_off[1] = 0;
1232 for (i = 1, index = 0; i < num_cfg + 1; i++) {
1235 * 0 means default mode
1239 ret = of_property_read_u32_index(np, propname, index++, &type);
1243 ret = of_property_read_u32_index(np, propname, index++, &rx);
1247 ret = of_property_read_u32_index(np, propname, index++, &tx);
1251 if ((rx & ~soc_dl) || (tx & ~soc_dl)) {
1252 dev_err(dev, "dataline cfg[%d] setting error, mask is 0x%x\n", i, soc_dl);
1260 cfg[i].pins[0] = hweight8(rx);
1261 cfg[i].mask[0] = rx;
1263 cfg[i].start_off[0] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
1264 cfg[i].next_off[0] = fsl_sai_calc_dl_off(rx);
1266 cfg[i].pins[1] = hweight8(tx);
1267 cfg[i].mask[1] = tx;
1269 cfg[i].start_off[1] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
1270 cfg[i].next_off[1] = fsl_sai_calc_dl_off(tx);
1274 sai->dl_cfg_cnt = num_cfg + 1;
1278 static int fsl_sai_runtime_suspend(struct device *dev);
1279 static int fsl_sai_runtime_resume(struct device *dev);
1281 static int fsl_sai_probe(struct platform_device *pdev)
1283 struct device_node *np = pdev->dev.of_node;
1284 struct device *dev = &pdev->dev;
1285 struct fsl_sai *sai;
1293 sai = devm_kzalloc(dev, sizeof(*sai), GFP_KERNEL);
1298 sai->soc_data = of_device_get_match_data(dev);
1300 sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
1302 base = devm_platform_get_and_ioremap_resource(pdev, 0, &sai->res);
1304 return PTR_ERR(base);
1306 if (sai->soc_data->reg_offset == 8) {
1307 fsl_sai_regmap_config.reg_defaults = fsl_sai_reg_defaults_ofs8;
1308 fsl_sai_regmap_config.max_register = FSL_SAI_MDIV;
1309 fsl_sai_regmap_config.num_reg_defaults =
1310 ARRAY_SIZE(fsl_sai_reg_defaults_ofs8);
1313 sai->regmap = devm_regmap_init_mmio(dev, base, &fsl_sai_regmap_config);
1314 if (IS_ERR(sai->regmap)) {
1315 dev_err(dev, "regmap init failed\n");
1316 return PTR_ERR(sai->regmap);
1319 sai->bus_clk = devm_clk_get(dev, "bus");
1320 /* Compatible with old DTB cases */
1321 if (IS_ERR(sai->bus_clk) && PTR_ERR(sai->bus_clk) != -EPROBE_DEFER)
1322 sai->bus_clk = devm_clk_get(dev, "sai");
1323 if (IS_ERR(sai->bus_clk)) {
1324 dev_err(dev, "failed to get bus clock: %ld\n",
1325 PTR_ERR(sai->bus_clk));
1327 return PTR_ERR(sai->bus_clk);
1330 for (i = 1; i < FSL_SAI_MCLK_MAX; i++) {
1331 sprintf(tmp, "mclk%d", i);
1332 sai->mclk_clk[i] = devm_clk_get(dev, tmp);
1333 if (IS_ERR(sai->mclk_clk[i])) {
1334 dev_err(dev, "failed to get mclk%d clock: %ld\n",
1335 i, PTR_ERR(sai->mclk_clk[i]));
1336 sai->mclk_clk[i] = NULL;
1340 if (sai->soc_data->mclk0_is_mclk1)
1341 sai->mclk_clk[0] = sai->mclk_clk[1];
1343 sai->mclk_clk[0] = sai->bus_clk;
1345 fsl_asoc_get_pll_clocks(&pdev->dev, &sai->pll8k_clk,
1348 /* Use Multi FIFO mode depending on the support from SDMA script */
1349 ret = of_property_read_u32_array(np, "dmas", dmas, 4);
1350 if (!sai->soc_data->use_edma && !ret && dmas[2] == IMX_DMATYPE_MULTI_SAI)
1351 sai->is_multi_fifo_dma = true;
1353 /* read dataline mask for rx and tx*/
1354 ret = fsl_sai_read_dlcfg(sai);
1356 dev_err(dev, "failed to read dlcfg %d\n", ret);
1360 irq = platform_get_irq(pdev, 0);
1364 ret = devm_request_irq(dev, irq, fsl_sai_isr, IRQF_SHARED,
1367 dev_err(dev, "failed to claim irq %u\n", irq);
1371 memcpy(&sai->cpu_dai_drv, &fsl_sai_dai_template,
1372 sizeof(fsl_sai_dai_template));
1374 /* Sync Tx with Rx as default by following old DT binding */
1375 sai->synchronous[RX] = true;
1376 sai->synchronous[TX] = false;
1377 sai->cpu_dai_drv.symmetric_rate = 1;
1378 sai->cpu_dai_drv.symmetric_channels = 1;
1379 sai->cpu_dai_drv.symmetric_sample_bits = 1;
1381 if (of_find_property(np, "fsl,sai-synchronous-rx", NULL) &&
1382 of_find_property(np, "fsl,sai-asynchronous", NULL)) {
1383 /* error out if both synchronous and asynchronous are present */
1384 dev_err(dev, "invalid binding for synchronous mode\n");
1388 if (of_find_property(np, "fsl,sai-synchronous-rx", NULL)) {
1389 /* Sync Rx with Tx */
1390 sai->synchronous[RX] = false;
1391 sai->synchronous[TX] = true;
1392 } else if (of_find_property(np, "fsl,sai-asynchronous", NULL)) {
1393 /* Discard all settings for asynchronous mode */
1394 sai->synchronous[RX] = false;
1395 sai->synchronous[TX] = false;
1396 sai->cpu_dai_drv.symmetric_rate = 0;
1397 sai->cpu_dai_drv.symmetric_channels = 0;
1398 sai->cpu_dai_drv.symmetric_sample_bits = 0;
1401 if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) &&
1402 of_device_is_compatible(np, "fsl,imx6ul-sai")) {
1403 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
1405 dev_err(dev, "cannot find iomuxc registers\n");
1406 return PTR_ERR(gpr);
1409 index = of_alias_get_id(np, "sai");
1413 regmap_update_bits(gpr, IOMUXC_GPR1, MCLK_DIR(index),
1417 sai->dma_params_rx.addr = sai->res->start + FSL_SAI_RDR0;
1418 sai->dma_params_tx.addr = sai->res->start + FSL_SAI_TDR0;
1419 sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;
1420 sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;
1422 sai->pinctrl = devm_pinctrl_get(&pdev->dev);
1424 platform_set_drvdata(pdev, sai);
1425 pm_runtime_enable(dev);
1426 if (!pm_runtime_enabled(dev)) {
1427 ret = fsl_sai_runtime_resume(dev);
1429 goto err_pm_disable;
1432 ret = pm_runtime_resume_and_get(dev);
1434 goto err_pm_get_sync;
1436 /* Get sai version */
1437 ret = fsl_sai_check_version(dev);
1439 dev_warn(dev, "Error reading SAI version: %d\n", ret);
1441 /* Select MCLK direction */
1442 if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) &&
1443 sai->soc_data->max_register >= FSL_SAI_MCTL) {
1444 regmap_update_bits(sai->regmap, FSL_SAI_MCTL,
1445 FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN);
1448 ret = pm_runtime_put_sync(dev);
1449 if (ret < 0 && ret != -ENOSYS)
1450 goto err_pm_get_sync;
1453 * Register platform component before registering cpu dai for there
1454 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
1456 if (sai->soc_data->use_imx_pcm) {
1457 ret = imx_pcm_dma_init(pdev);
1459 if (!IS_ENABLED(CONFIG_SND_SOC_IMX_PCM_DMA))
1460 dev_err(dev, "Error: You must enable the imx-pcm-dma support!\n");
1461 goto err_pm_get_sync;
1464 ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
1466 goto err_pm_get_sync;
1469 ret = devm_snd_soc_register_component(dev, &fsl_component,
1470 &sai->cpu_dai_drv, 1);
1472 goto err_pm_get_sync;
1477 if (!pm_runtime_status_suspended(dev))
1478 fsl_sai_runtime_suspend(dev);
1480 pm_runtime_disable(dev);
1485 static int fsl_sai_remove(struct platform_device *pdev)
1487 pm_runtime_disable(&pdev->dev);
1488 if (!pm_runtime_status_suspended(&pdev->dev))
1489 fsl_sai_runtime_suspend(&pdev->dev);
1494 static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
1495 .use_imx_pcm = false,
1500 .mclk0_is_mclk1 = false,
1502 .max_register = FSL_SAI_RMR,
1505 static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
1506 .use_imx_pcm = true,
1511 .mclk0_is_mclk1 = true,
1513 .max_register = FSL_SAI_RMR,
1516 static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
1517 .use_imx_pcm = true,
1522 .mclk0_is_mclk1 = false,
1523 .flags = PMQOS_CPU_LATENCY,
1524 .max_register = FSL_SAI_RMR,
1527 static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
1528 .use_imx_pcm = true,
1533 .mclk0_is_mclk1 = false,
1535 .max_register = FSL_SAI_RMR,
1538 static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
1539 .use_imx_pcm = true,
1544 .mclk0_is_mclk1 = false,
1546 .max_register = FSL_SAI_RMR,
1549 static const struct fsl_sai_soc_data fsl_sai_imx8mm_data = {
1550 .use_imx_pcm = true,
1554 .mclk0_is_mclk1 = false,
1557 .max_register = FSL_SAI_MCTL,
1560 static const struct fsl_sai_soc_data fsl_sai_imx8mp_data = {
1561 .use_imx_pcm = true,
1565 .mclk0_is_mclk1 = false,
1568 .max_register = FSL_SAI_MDIV,
1571 static const struct fsl_sai_soc_data fsl_sai_imx8ulp_data = {
1572 .use_imx_pcm = true,
1576 .mclk0_is_mclk1 = false,
1578 .flags = PMQOS_CPU_LATENCY,
1579 .max_register = FSL_SAI_RTCAP,
1582 static const struct of_device_id fsl_sai_ids[] = {
1583 { .compatible = "fsl,vf610-sai", .data = &fsl_sai_vf610_data },
1584 { .compatible = "fsl,imx6sx-sai", .data = &fsl_sai_imx6sx_data },
1585 { .compatible = "fsl,imx6ul-sai", .data = &fsl_sai_imx6sx_data },
1586 { .compatible = "fsl,imx7ulp-sai", .data = &fsl_sai_imx7ulp_data },
1587 { .compatible = "fsl,imx8mq-sai", .data = &fsl_sai_imx8mq_data },
1588 { .compatible = "fsl,imx8qm-sai", .data = &fsl_sai_imx8qm_data },
1589 { .compatible = "fsl,imx8mm-sai", .data = &fsl_sai_imx8mm_data },
1590 { .compatible = "fsl,imx8mp-sai", .data = &fsl_sai_imx8mp_data },
1591 { .compatible = "fsl,imx8ulp-sai", .data = &fsl_sai_imx8ulp_data },
1592 { .compatible = "fsl,imx8mn-sai", .data = &fsl_sai_imx8mp_data },
1595 MODULE_DEVICE_TABLE(of, fsl_sai_ids);
1597 static int fsl_sai_runtime_suspend(struct device *dev)
1599 struct fsl_sai *sai = dev_get_drvdata(dev);
1601 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE))
1602 clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]);
1604 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK))
1605 clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1]]);
1607 clk_disable_unprepare(sai->bus_clk);
1609 if (sai->soc_data->flags & PMQOS_CPU_LATENCY)
1610 cpu_latency_qos_remove_request(&sai->pm_qos_req);
1612 regcache_cache_only(sai->regmap, true);
1617 static int fsl_sai_runtime_resume(struct device *dev)
1619 struct fsl_sai *sai = dev_get_drvdata(dev);
1620 unsigned int ofs = sai->soc_data->reg_offset;
1623 ret = clk_prepare_enable(sai->bus_clk);
1625 dev_err(dev, "failed to enable bus clock: %d\n", ret);
1629 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK)) {
1630 ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[1]]);
1632 goto disable_bus_clk;
1635 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) {
1636 ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[0]]);
1638 goto disable_tx_clk;
1641 if (sai->soc_data->flags & PMQOS_CPU_LATENCY)
1642 cpu_latency_qos_add_request(&sai->pm_qos_req, 0);
1644 regcache_cache_only(sai->regmap, false);
1645 regcache_mark_dirty(sai->regmap);
1646 regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR);
1647 regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR);
1648 usleep_range(1000, 2000);
1649 regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), 0);
1650 regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), 0);
1652 ret = regcache_sync(sai->regmap);
1654 goto disable_rx_clk;
1659 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE))
1660 clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]);
1662 if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK))
1663 clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1]]);
1665 clk_disable_unprepare(sai->bus_clk);
1670 static const struct dev_pm_ops fsl_sai_pm_ops = {
1671 SET_RUNTIME_PM_OPS(fsl_sai_runtime_suspend,
1672 fsl_sai_runtime_resume, NULL)
1673 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1674 pm_runtime_force_resume)
1677 static struct platform_driver fsl_sai_driver = {
1678 .probe = fsl_sai_probe,
1679 .remove = fsl_sai_remove,
1682 .pm = &fsl_sai_pm_ops,
1683 .of_match_table = fsl_sai_ids,
1686 module_platform_driver(fsl_sai_driver);
1688 MODULE_DESCRIPTION("Freescale Soc SAI Interface");
1689 MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>");
1690 MODULE_ALIAS("platform:fsl-sai");
1691 MODULE_LICENSE("GPL");