1 // SPDX-License-Identifier: GPL-2.0
3 // Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
5 // Copyright (C) 2013 Freescale Semiconductor, Inc.
7 // Based on stmp3xxx_spdif_dai.c
8 // Vladimir Barinov <vbarinov@embeddedalley.com>
9 // Copyright 2008 SigmaTel, Inc
10 // Copyright 2008 Embedded Alley Solutions, Inc
12 #include <linux/bitrev.h>
13 #include <linux/clk.h>
14 #include <linux/module.h>
15 #include <linux/of_address.h>
16 #include <linux/of_device.h>
17 #include <linux/of_irq.h>
18 #include <linux/regmap.h>
19 #include <linux/pm_runtime.h>
21 #include <sound/asoundef.h>
22 #include <sound/dmaengine_pcm.h>
23 #include <sound/soc.h>
25 #include "fsl_spdif.h"
28 #define FSL_SPDIF_TXFIFO_WML 0x8
29 #define FSL_SPDIF_RXFIFO_WML 0x8
31 #define INTR_FOR_PLAYBACK (INT_TXFIFO_RESYNC)
32 #define INTR_FOR_CAPTURE (INT_SYM_ERR | INT_BIT_ERR | INT_URX_FUL |\
33 INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |\
34 INT_UQ_SYNC | INT_UQ_ERR | INT_RXFIFO_RESYNC |\
35 INT_LOSS_LOCK | INT_DPLL_LOCKED)
37 #define SIE_INTR_FOR(tx) (tx ? INTR_FOR_PLAYBACK : INTR_FOR_CAPTURE)
39 /* Index list for the values that has if (DPLL Locked) condition */
40 static u8 srpc_dpll_locked[] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0xa, 0xb };
41 #define SRPC_NODPLL_START1 0x5
42 #define SRPC_NODPLL_START2 0xc
44 #define DEFAULT_RXCLK_SRC 1
47 * struct fsl_spdif_soc_data: soc specific data
49 * @imx: for imx platform
50 * @shared_root_clock: flag of sharing a clock source with others;
51 * so the driver shouldn't set root clock rate
52 * @interrupts: interrupt number
53 * @tx_burst: tx maxburst size
54 * @rx_burst: rx maxburst size
55 * @tx_formats: tx supported data format
57 struct fsl_spdif_soc_data {
59 bool shared_root_clock;
67 * SPDIF control structure
68 * Defines channel status, subcode and Q sub
70 struct spdif_mixer_control {
71 /* spinlock to access control data */
74 /* IEC958 channel tx status bit */
75 unsigned char ch_status[4];
78 unsigned char subcode[2 * SPDIF_UBITS_SIZE];
80 /* Q subcode part of user bits */
81 unsigned char qsub[2 * SPDIF_QSUB_SIZE];
83 /* Buffer offset for U/Q */
87 /* Ready buffer index of the two buffers */
92 * struct fsl_spdif_priv - Freescale SPDIF private data
93 * @soc: SPDIF soc data
94 * @fsl_spdif_control: SPDIF control data
95 * @cpu_dai_drv: cpu dai driver
96 * @pdev: platform device pointer
97 * @regmap: regmap handler
98 * @dpll_locked: dpll lock flag
99 * @txrate: the best rates for playback
100 * @txclk_df: STC_TXCLK_DF dividers value for playback
101 * @sysclk_df: STC_SYSCLK_DF dividers value for playback
102 * @txclk_src: STC_TXCLK_SRC values for playback
103 * @rxclk_src: SRPC_CLKSRC_SEL values for capture
104 * @txclk: tx clock sources for playback
105 * @rxclk: rx clock sources for capture
106 * @coreclk: core clock for register access via DMA
107 * @sysclk: system clock for rx clock rate measurement
108 * @spbaclk: SPBA clock (optional, depending on SoC design)
109 * @dma_params_tx: DMA parameters for transmit channel
110 * @dma_params_rx: DMA parameters for receive channel
111 * @regcache_srpc: regcache for SRPC
113 struct fsl_spdif_priv {
114 const struct fsl_spdif_soc_data *soc;
115 struct spdif_mixer_control fsl_spdif_control;
116 struct snd_soc_dai_driver cpu_dai_drv;
117 struct platform_device *pdev;
118 struct regmap *regmap;
120 u32 txrate[SPDIF_TXRATE_MAX];
121 u8 txclk_df[SPDIF_TXRATE_MAX];
122 u16 sysclk_df[SPDIF_TXRATE_MAX];
123 u8 txclk_src[SPDIF_TXRATE_MAX];
125 struct clk *txclk[SPDIF_TXRATE_MAX];
130 struct snd_dmaengine_dai_dma_data dma_params_tx;
131 struct snd_dmaengine_dai_dma_data dma_params_rx;
132 /* regcache for SRPC */
136 static struct fsl_spdif_soc_data fsl_spdif_vf610 = {
138 .shared_root_clock = false,
140 .tx_burst = FSL_SPDIF_TXFIFO_WML,
141 .rx_burst = FSL_SPDIF_RXFIFO_WML,
142 .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
145 static struct fsl_spdif_soc_data fsl_spdif_imx35 = {
147 .shared_root_clock = false,
149 .tx_burst = FSL_SPDIF_TXFIFO_WML,
150 .rx_burst = FSL_SPDIF_RXFIFO_WML,
151 .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
154 static struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
156 .shared_root_clock = true,
158 .tx_burst = FSL_SPDIF_TXFIFO_WML,
159 .rx_burst = FSL_SPDIF_RXFIFO_WML,
160 .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
164 static struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
166 .shared_root_clock = true,
168 .tx_burst = 2, /* Applied for EDMA */
169 .rx_burst = 2, /* Applied for EDMA */
170 .tx_formats = SNDRV_PCM_FMTBIT_S24_LE, /* Applied for EDMA */
173 /* Check if clk is a root clock that does not share clock source with others */
174 static inline bool fsl_spdif_can_set_clk_rate(struct fsl_spdif_priv *spdif, int clk)
176 return (clk == STC_TXCLK_SPDIF_ROOT) && !spdif->soc->shared_root_clock;
179 /* DPLL locked and lock loss interrupt handler */
180 static void spdif_irq_dpll_lock(struct fsl_spdif_priv *spdif_priv)
182 struct regmap *regmap = spdif_priv->regmap;
183 struct platform_device *pdev = spdif_priv->pdev;
186 regmap_read(regmap, REG_SPDIF_SRPC, &locked);
187 locked &= SRPC_DPLL_LOCKED;
189 dev_dbg(&pdev->dev, "isr: Rx dpll %s \n",
190 locked ? "locked" : "loss lock");
192 spdif_priv->dpll_locked = locked ? true : false;
195 /* Receiver found illegal symbol interrupt handler */
196 static void spdif_irq_sym_error(struct fsl_spdif_priv *spdif_priv)
198 struct regmap *regmap = spdif_priv->regmap;
199 struct platform_device *pdev = spdif_priv->pdev;
201 dev_dbg(&pdev->dev, "isr: receiver found illegal symbol\n");
203 /* Clear illegal symbol if DPLL unlocked since no audio stream */
204 if (!spdif_priv->dpll_locked)
205 regmap_update_bits(regmap, REG_SPDIF_SIE, INT_SYM_ERR, 0);
208 /* U/Q Channel receive register full */
209 static void spdif_irq_uqrx_full(struct fsl_spdif_priv *spdif_priv, char name)
211 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
212 struct regmap *regmap = spdif_priv->regmap;
213 struct platform_device *pdev = spdif_priv->pdev;
214 u32 *pos, size, val, reg;
219 size = SPDIF_UBITS_SIZE;
224 size = SPDIF_QSUB_SIZE;
228 dev_err(&pdev->dev, "unsupported channel name\n");
232 dev_dbg(&pdev->dev, "isr: %c Channel receive register full\n", name);
234 if (*pos >= size * 2) {
236 } else if (unlikely((*pos % size) + 3 > size)) {
237 dev_err(&pdev->dev, "User bit receive buffer overflow\n");
241 regmap_read(regmap, reg, &val);
242 ctrl->subcode[*pos++] = val >> 16;
243 ctrl->subcode[*pos++] = val >> 8;
244 ctrl->subcode[*pos++] = val;
247 /* U/Q Channel sync found */
248 static void spdif_irq_uq_sync(struct fsl_spdif_priv *spdif_priv)
250 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
251 struct platform_device *pdev = spdif_priv->pdev;
253 dev_dbg(&pdev->dev, "isr: U/Q Channel sync found\n");
255 /* U/Q buffer reset */
259 /* Set ready to this buffer */
260 ctrl->ready_buf = (ctrl->qpos - 1) / SPDIF_QSUB_SIZE + 1;
263 /* U/Q Channel framing error */
264 static void spdif_irq_uq_err(struct fsl_spdif_priv *spdif_priv)
266 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
267 struct regmap *regmap = spdif_priv->regmap;
268 struct platform_device *pdev = spdif_priv->pdev;
271 dev_dbg(&pdev->dev, "isr: U/Q Channel framing error\n");
273 /* Read U/Q data to clear the irq and do buffer reset */
274 regmap_read(regmap, REG_SPDIF_SRU, &val);
275 regmap_read(regmap, REG_SPDIF_SRQ, &val);
277 /* Drop this U/Q buffer */
283 /* Get spdif interrupt status and clear the interrupt */
284 static u32 spdif_intr_status_clear(struct fsl_spdif_priv *spdif_priv)
286 struct regmap *regmap = spdif_priv->regmap;
289 regmap_read(regmap, REG_SPDIF_SIS, &val);
290 regmap_read(regmap, REG_SPDIF_SIE, &val2);
292 regmap_write(regmap, REG_SPDIF_SIC, val & val2);
297 static irqreturn_t spdif_isr(int irq, void *devid)
299 struct fsl_spdif_priv *spdif_priv = (struct fsl_spdif_priv *)devid;
300 struct platform_device *pdev = spdif_priv->pdev;
303 sis = spdif_intr_status_clear(spdif_priv);
305 if (sis & INT_DPLL_LOCKED)
306 spdif_irq_dpll_lock(spdif_priv);
308 if (sis & INT_TXFIFO_UNOV)
309 dev_dbg(&pdev->dev, "isr: Tx FIFO under/overrun\n");
311 if (sis & INT_TXFIFO_RESYNC)
312 dev_dbg(&pdev->dev, "isr: Tx FIFO resync\n");
315 dev_dbg(&pdev->dev, "isr: cstatus new\n");
317 if (sis & INT_VAL_NOGOOD)
318 dev_dbg(&pdev->dev, "isr: validity flag no good\n");
320 if (sis & INT_SYM_ERR)
321 spdif_irq_sym_error(spdif_priv);
323 if (sis & INT_BIT_ERR)
324 dev_dbg(&pdev->dev, "isr: receiver found parity bit error\n");
326 if (sis & INT_URX_FUL)
327 spdif_irq_uqrx_full(spdif_priv, 'U');
329 if (sis & INT_URX_OV)
330 dev_dbg(&pdev->dev, "isr: U Channel receive register overrun\n");
332 if (sis & INT_QRX_FUL)
333 spdif_irq_uqrx_full(spdif_priv, 'Q');
335 if (sis & INT_QRX_OV)
336 dev_dbg(&pdev->dev, "isr: Q Channel receive register overrun\n");
338 if (sis & INT_UQ_SYNC)
339 spdif_irq_uq_sync(spdif_priv);
341 if (sis & INT_UQ_ERR)
342 spdif_irq_uq_err(spdif_priv);
344 if (sis & INT_RXFIFO_UNOV)
345 dev_dbg(&pdev->dev, "isr: Rx FIFO under/overrun\n");
347 if (sis & INT_RXFIFO_RESYNC)
348 dev_dbg(&pdev->dev, "isr: Rx FIFO resync\n");
350 if (sis & INT_LOSS_LOCK)
351 spdif_irq_dpll_lock(spdif_priv);
353 /* FIXME: Write Tx FIFO to clear TxEm */
355 dev_dbg(&pdev->dev, "isr: Tx FIFO empty\n");
357 /* FIXME: Read Rx FIFO to clear RxFIFOFul */
358 if (sis & INT_RXFIFO_FUL)
359 dev_dbg(&pdev->dev, "isr: Rx FIFO full\n");
364 static int spdif_softreset(struct fsl_spdif_priv *spdif_priv)
366 struct regmap *regmap = spdif_priv->regmap;
367 u32 val, cycle = 1000;
369 regcache_cache_bypass(regmap, true);
371 regmap_write(regmap, REG_SPDIF_SCR, SCR_SOFT_RESET);
374 * RESET bit would be cleared after finishing its reset procedure,
375 * which typically lasts 8 cycles. 1000 cycles will keep it safe.
378 regmap_read(regmap, REG_SPDIF_SCR, &val);
379 } while ((val & SCR_SOFT_RESET) && cycle--);
381 regcache_cache_bypass(regmap, false);
382 regcache_mark_dirty(regmap);
383 regcache_sync(regmap);
391 static void spdif_set_cstatus(struct spdif_mixer_control *ctrl,
394 ctrl->ch_status[3] &= ~mask;
395 ctrl->ch_status[3] |= cstatus & mask;
398 static void spdif_write_channel_status(struct fsl_spdif_priv *spdif_priv)
400 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
401 struct regmap *regmap = spdif_priv->regmap;
402 struct platform_device *pdev = spdif_priv->pdev;
405 ch_status = (bitrev8(ctrl->ch_status[0]) << 16) |
406 (bitrev8(ctrl->ch_status[1]) << 8) |
407 bitrev8(ctrl->ch_status[2]);
408 regmap_write(regmap, REG_SPDIF_STCSCH, ch_status);
410 dev_dbg(&pdev->dev, "STCSCH: 0x%06x\n", ch_status);
412 ch_status = bitrev8(ctrl->ch_status[3]) << 16;
413 regmap_write(regmap, REG_SPDIF_STCSCL, ch_status);
415 dev_dbg(&pdev->dev, "STCSCL: 0x%06x\n", ch_status);
418 /* Set SPDIF PhaseConfig register for rx clock */
419 static int spdif_set_rx_clksrc(struct fsl_spdif_priv *spdif_priv,
420 enum spdif_gainsel gainsel, int dpll_locked)
422 struct regmap *regmap = spdif_priv->regmap;
423 u8 clksrc = spdif_priv->rxclk_src;
425 if (clksrc >= SRPC_CLKSRC_MAX || gainsel >= GAINSEL_MULTI_MAX)
428 regmap_update_bits(regmap, REG_SPDIF_SRPC,
429 SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
430 SRPC_CLKSRC_SEL_SET(clksrc) | SRPC_GAINSEL_SET(gainsel));
435 static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
438 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
439 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
440 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
441 struct regmap *regmap = spdif_priv->regmap;
442 struct platform_device *pdev = spdif_priv->pdev;
443 unsigned long csfs = 0;
449 switch (sample_rate) {
451 rate = SPDIF_TXRATE_32000;
452 csfs = IEC958_AES3_CON_FS_32000;
455 rate = SPDIF_TXRATE_44100;
456 csfs = IEC958_AES3_CON_FS_44100;
459 rate = SPDIF_TXRATE_48000;
460 csfs = IEC958_AES3_CON_FS_48000;
463 rate = SPDIF_TXRATE_88200;
464 csfs = IEC958_AES3_CON_FS_88200;
467 rate = SPDIF_TXRATE_96000;
468 csfs = IEC958_AES3_CON_FS_96000;
471 rate = SPDIF_TXRATE_176400;
472 csfs = IEC958_AES3_CON_FS_176400;
475 rate = SPDIF_TXRATE_192000;
476 csfs = IEC958_AES3_CON_FS_192000;
479 dev_err(&pdev->dev, "unsupported sample rate %d\n", sample_rate);
483 clk = spdif_priv->txclk_src[rate];
484 if (clk >= STC_TXCLK_SRC_MAX) {
485 dev_err(&pdev->dev, "tx clock source is out of range\n");
489 txclk_df = spdif_priv->txclk_df[rate];
491 dev_err(&pdev->dev, "the txclk_df can't be zero\n");
495 sysclk_df = spdif_priv->sysclk_df[rate];
497 if (!fsl_spdif_can_set_clk_rate(spdif_priv, clk))
500 /* The S/PDIF block needs a clock of 64 * fs * txclk_df */
501 ret = clk_set_rate(spdif_priv->txclk[rate],
502 64 * sample_rate * txclk_df);
504 dev_err(&pdev->dev, "failed to set tx clock rate\n");
509 dev_dbg(&pdev->dev, "expected clock rate = %d\n",
510 (64 * sample_rate * txclk_df * sysclk_df));
511 dev_dbg(&pdev->dev, "actual clock rate = %ld\n",
512 clk_get_rate(spdif_priv->txclk[rate]));
514 /* set fs field in consumer channel status */
515 spdif_set_cstatus(ctrl, IEC958_AES3_CON_FS, csfs);
517 /* select clock source and divisor */
518 stc = STC_TXCLK_ALL_EN | STC_TXCLK_SRC_SET(clk) |
519 STC_TXCLK_DF(txclk_df) | STC_SYSCLK_DF(sysclk_df);
520 mask = STC_TXCLK_ALL_EN_MASK | STC_TXCLK_SRC_MASK |
521 STC_TXCLK_DF_MASK | STC_SYSCLK_DF_MASK;
522 regmap_update_bits(regmap, REG_SPDIF_STC, mask, stc);
524 dev_dbg(&pdev->dev, "set sample rate to %dHz for %dHz playback\n",
525 spdif_priv->txrate[rate], sample_rate);
530 static int fsl_spdif_startup(struct snd_pcm_substream *substream,
531 struct snd_soc_dai *cpu_dai)
533 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
534 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
535 struct platform_device *pdev = spdif_priv->pdev;
536 struct regmap *regmap = spdif_priv->regmap;
540 /* Reset module and interrupts only for first initialization */
541 if (!snd_soc_dai_active(cpu_dai)) {
542 ret = spdif_softreset(spdif_priv);
544 dev_err(&pdev->dev, "failed to soft reset\n");
548 /* Disable all the interrupts */
549 regmap_update_bits(regmap, REG_SPDIF_SIE, 0xffffff, 0);
552 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
553 scr = SCR_TXFIFO_AUTOSYNC | SCR_TXFIFO_CTRL_NORMAL |
554 SCR_TXSEL_NORMAL | SCR_USRC_SEL_CHIP |
556 mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
557 SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
558 SCR_TXFIFO_FSEL_MASK;
560 scr = SCR_RXFIFO_FSEL_IF8 | SCR_RXFIFO_AUTOSYNC;
561 mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
562 SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
564 regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
566 /* Power up SPDIF module */
567 regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_LOW_POWER, 0);
572 static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
573 struct snd_soc_dai *cpu_dai)
575 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
576 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
577 struct regmap *regmap = spdif_priv->regmap;
580 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
582 mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
583 SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
584 SCR_TXFIFO_FSEL_MASK;
586 scr = SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO;
587 mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
588 SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
590 regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
592 /* Power down SPDIF module only if tx&rx are both inactive */
593 if (!snd_soc_dai_active(cpu_dai)) {
594 spdif_intr_status_clear(spdif_priv);
595 regmap_update_bits(regmap, REG_SPDIF_SCR,
596 SCR_LOW_POWER, SCR_LOW_POWER);
600 static int fsl_spdif_hw_params(struct snd_pcm_substream *substream,
601 struct snd_pcm_hw_params *params,
602 struct snd_soc_dai *dai)
604 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
605 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
606 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
607 struct platform_device *pdev = spdif_priv->pdev;
608 u32 sample_rate = params_rate(params);
611 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
612 ret = spdif_set_sample_rate(substream, sample_rate);
614 dev_err(&pdev->dev, "%s: set sample rate failed: %d\n",
615 __func__, sample_rate);
618 spdif_set_cstatus(ctrl, IEC958_AES3_CON_CLOCK,
619 IEC958_AES3_CON_CLOCK_1000PPM);
620 spdif_write_channel_status(spdif_priv);
622 /* Setup rx clock source */
623 ret = spdif_set_rx_clksrc(spdif_priv, SPDIF_DEFAULT_GAINSEL, 1);
629 static int fsl_spdif_trigger(struct snd_pcm_substream *substream,
630 int cmd, struct snd_soc_dai *dai)
632 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
633 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
634 struct regmap *regmap = spdif_priv->regmap;
635 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
636 u32 intr = SIE_INTR_FOR(tx);
637 u32 dmaen = SCR_DMA_xX_EN(tx);
640 case SNDRV_PCM_TRIGGER_START:
641 case SNDRV_PCM_TRIGGER_RESUME:
642 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
643 regmap_update_bits(regmap, REG_SPDIF_SIE, intr, intr);
644 regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, dmaen);
646 case SNDRV_PCM_TRIGGER_STOP:
647 case SNDRV_PCM_TRIGGER_SUSPEND:
648 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
649 regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, 0);
650 regmap_update_bits(regmap, REG_SPDIF_SIE, intr, 0);
659 static const struct snd_soc_dai_ops fsl_spdif_dai_ops = {
660 .startup = fsl_spdif_startup,
661 .hw_params = fsl_spdif_hw_params,
662 .trigger = fsl_spdif_trigger,
663 .shutdown = fsl_spdif_shutdown,
668 * FSL SPDIF IEC958 controller(mixer) functions
670 * Channel status get/put control
671 * User bit value get/put control
672 * Valid bit value get control
673 * DPLL lock status get control
674 * User bit sync mode selection control
677 static int fsl_spdif_info(struct snd_kcontrol *kcontrol,
678 struct snd_ctl_elem_info *uinfo)
680 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
686 static int fsl_spdif_pb_get(struct snd_kcontrol *kcontrol,
687 struct snd_ctl_elem_value *uvalue)
689 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
690 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
691 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
693 uvalue->value.iec958.status[0] = ctrl->ch_status[0];
694 uvalue->value.iec958.status[1] = ctrl->ch_status[1];
695 uvalue->value.iec958.status[2] = ctrl->ch_status[2];
696 uvalue->value.iec958.status[3] = ctrl->ch_status[3];
701 static int fsl_spdif_pb_put(struct snd_kcontrol *kcontrol,
702 struct snd_ctl_elem_value *uvalue)
704 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
705 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
706 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
708 ctrl->ch_status[0] = uvalue->value.iec958.status[0];
709 ctrl->ch_status[1] = uvalue->value.iec958.status[1];
710 ctrl->ch_status[2] = uvalue->value.iec958.status[2];
711 ctrl->ch_status[3] = uvalue->value.iec958.status[3];
713 spdif_write_channel_status(spdif_priv);
718 /* Get channel status from SPDIF_RX_CCHAN register */
719 static int fsl_spdif_capture_get(struct snd_kcontrol *kcontrol,
720 struct snd_ctl_elem_value *ucontrol)
722 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
723 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
724 struct regmap *regmap = spdif_priv->regmap;
727 regmap_read(regmap, REG_SPDIF_SIS, &val);
728 if (!(val & INT_CNEW))
731 regmap_read(regmap, REG_SPDIF_SRCSH, &cstatus);
732 ucontrol->value.iec958.status[0] = (cstatus >> 16) & 0xFF;
733 ucontrol->value.iec958.status[1] = (cstatus >> 8) & 0xFF;
734 ucontrol->value.iec958.status[2] = cstatus & 0xFF;
736 regmap_read(regmap, REG_SPDIF_SRCSL, &cstatus);
737 ucontrol->value.iec958.status[3] = (cstatus >> 16) & 0xFF;
738 ucontrol->value.iec958.status[4] = (cstatus >> 8) & 0xFF;
739 ucontrol->value.iec958.status[5] = cstatus & 0xFF;
742 regmap_write(regmap, REG_SPDIF_SIC, INT_CNEW);
748 * Get User bits (subcode) from chip value which readed out
749 * in UChannel register.
751 static int fsl_spdif_subcode_get(struct snd_kcontrol *kcontrol,
752 struct snd_ctl_elem_value *ucontrol)
754 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
755 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
756 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
760 spin_lock_irqsave(&ctrl->ctl_lock, flags);
761 if (ctrl->ready_buf) {
762 int idx = (ctrl->ready_buf - 1) * SPDIF_UBITS_SIZE;
763 memcpy(&ucontrol->value.iec958.subcode[0],
764 &ctrl->subcode[idx], SPDIF_UBITS_SIZE);
767 spin_unlock_irqrestore(&ctrl->ctl_lock, flags);
772 /* Q-subcode information. The byte size is SPDIF_UBITS_SIZE/8 */
773 static int fsl_spdif_qinfo(struct snd_kcontrol *kcontrol,
774 struct snd_ctl_elem_info *uinfo)
776 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
777 uinfo->count = SPDIF_QSUB_SIZE;
782 /* Get Q subcode from chip value which readed out in QChannel register */
783 static int fsl_spdif_qget(struct snd_kcontrol *kcontrol,
784 struct snd_ctl_elem_value *ucontrol)
786 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
787 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
788 struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
792 spin_lock_irqsave(&ctrl->ctl_lock, flags);
793 if (ctrl->ready_buf) {
794 int idx = (ctrl->ready_buf - 1) * SPDIF_QSUB_SIZE;
795 memcpy(&ucontrol->value.bytes.data[0],
796 &ctrl->qsub[idx], SPDIF_QSUB_SIZE);
799 spin_unlock_irqrestore(&ctrl->ctl_lock, flags);
804 /* Get valid good bit from interrupt status register */
805 static int fsl_spdif_rx_vbit_get(struct snd_kcontrol *kcontrol,
806 struct snd_ctl_elem_value *ucontrol)
808 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
809 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
810 struct regmap *regmap = spdif_priv->regmap;
813 regmap_read(regmap, REG_SPDIF_SIS, &val);
814 ucontrol->value.integer.value[0] = (val & INT_VAL_NOGOOD) != 0;
815 regmap_write(regmap, REG_SPDIF_SIC, INT_VAL_NOGOOD);
820 static int fsl_spdif_tx_vbit_get(struct snd_kcontrol *kcontrol,
821 struct snd_ctl_elem_value *ucontrol)
823 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
824 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
825 struct regmap *regmap = spdif_priv->regmap;
828 regmap_read(regmap, REG_SPDIF_SCR, &val);
829 val = (val & SCR_VAL_MASK) >> SCR_VAL_OFFSET;
831 ucontrol->value.integer.value[0] = val;
836 static int fsl_spdif_tx_vbit_put(struct snd_kcontrol *kcontrol,
837 struct snd_ctl_elem_value *ucontrol)
839 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
840 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
841 struct regmap *regmap = spdif_priv->regmap;
842 u32 val = (1 - ucontrol->value.integer.value[0]) << SCR_VAL_OFFSET;
844 regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_VAL_MASK, val);
849 /* DPLL lock information */
850 static int fsl_spdif_rxrate_info(struct snd_kcontrol *kcontrol,
851 struct snd_ctl_elem_info *uinfo)
853 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
855 uinfo->value.integer.min = 16000;
856 uinfo->value.integer.max = 192000;
861 static u32 gainsel_multi[GAINSEL_MULTI_MAX] = {
862 24, 16, 12, 8, 6, 4, 3,
865 /* Get RX data clock rate given the SPDIF bus_clk */
866 static int spdif_get_rxclk_rate(struct fsl_spdif_priv *spdif_priv,
867 enum spdif_gainsel gainsel)
869 struct regmap *regmap = spdif_priv->regmap;
870 struct platform_device *pdev = spdif_priv->pdev;
871 u64 tmpval64, busclk_freq = 0;
872 u32 freqmeas, phaseconf;
875 regmap_read(regmap, REG_SPDIF_SRFM, &freqmeas);
876 regmap_read(regmap, REG_SPDIF_SRPC, &phaseconf);
878 clksrc = (phaseconf >> SRPC_CLKSRC_SEL_OFFSET) & 0xf;
880 /* Get bus clock from system */
881 if (srpc_dpll_locked[clksrc] && (phaseconf & SRPC_DPLL_LOCKED))
882 busclk_freq = clk_get_rate(spdif_priv->sysclk);
884 /* FreqMeas_CLK = (BUS_CLK * FreqMeas) / 2 ^ 10 / GAINSEL / 128 */
885 tmpval64 = (u64) busclk_freq * freqmeas;
886 do_div(tmpval64, gainsel_multi[gainsel] * 1024);
887 do_div(tmpval64, 128 * 1024);
889 dev_dbg(&pdev->dev, "FreqMeas: %d\n", freqmeas);
890 dev_dbg(&pdev->dev, "BusclkFreq: %lld\n", busclk_freq);
891 dev_dbg(&pdev->dev, "RxRate: %lld\n", tmpval64);
893 return (int)tmpval64;
897 * Get DPLL lock or not info from stable interrupt status register.
898 * User application must use this control to get locked,
899 * then can do next PCM operation
901 static int fsl_spdif_rxrate_get(struct snd_kcontrol *kcontrol,
902 struct snd_ctl_elem_value *ucontrol)
904 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
905 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
908 if (spdif_priv->dpll_locked)
909 rate = spdif_get_rxclk_rate(spdif_priv, SPDIF_DEFAULT_GAINSEL);
911 ucontrol->value.integer.value[0] = rate;
917 * User bit sync mode:
918 * 1 CD User channel subcode
921 static int fsl_spdif_usync_get(struct snd_kcontrol *kcontrol,
922 struct snd_ctl_elem_value *ucontrol)
924 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
925 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
926 struct regmap *regmap = spdif_priv->regmap;
929 regmap_read(regmap, REG_SPDIF_SRCD, &val);
930 ucontrol->value.integer.value[0] = (val & SRCD_CD_USER) != 0;
936 * User bit sync mode:
937 * 1 CD User channel subcode
940 static int fsl_spdif_usync_put(struct snd_kcontrol *kcontrol,
941 struct snd_ctl_elem_value *ucontrol)
943 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
944 struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
945 struct regmap *regmap = spdif_priv->regmap;
946 u32 val = ucontrol->value.integer.value[0] << SRCD_CD_USER_OFFSET;
948 regmap_update_bits(regmap, REG_SPDIF_SRCD, SRCD_CD_USER, val);
953 /* FSL SPDIF IEC958 controller defines */
954 static struct snd_kcontrol_new fsl_spdif_ctrls[] = {
955 /* Status cchanel controller */
957 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
958 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
959 .access = SNDRV_CTL_ELEM_ACCESS_READ |
960 SNDRV_CTL_ELEM_ACCESS_WRITE |
961 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
962 .info = fsl_spdif_info,
963 .get = fsl_spdif_pb_get,
964 .put = fsl_spdif_pb_put,
967 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
968 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
969 .access = SNDRV_CTL_ELEM_ACCESS_READ |
970 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
971 .info = fsl_spdif_info,
972 .get = fsl_spdif_capture_get,
974 /* User bits controller */
976 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
977 .name = "IEC958 Subcode Capture Default",
978 .access = SNDRV_CTL_ELEM_ACCESS_READ |
979 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
980 .info = fsl_spdif_info,
981 .get = fsl_spdif_subcode_get,
984 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
985 .name = "IEC958 Q-subcode Capture Default",
986 .access = SNDRV_CTL_ELEM_ACCESS_READ |
987 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
988 .info = fsl_spdif_qinfo,
989 .get = fsl_spdif_qget,
991 /* Valid bit error controller */
993 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
994 .name = "IEC958 RX V-Bit Errors",
995 .access = SNDRV_CTL_ELEM_ACCESS_READ |
996 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
997 .info = snd_ctl_boolean_mono_info,
998 .get = fsl_spdif_rx_vbit_get,
1001 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
1002 .name = "IEC958 TX V-Bit",
1003 .access = SNDRV_CTL_ELEM_ACCESS_READ |
1004 SNDRV_CTL_ELEM_ACCESS_WRITE |
1005 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1006 .info = snd_ctl_boolean_mono_info,
1007 .get = fsl_spdif_tx_vbit_get,
1008 .put = fsl_spdif_tx_vbit_put,
1010 /* DPLL lock info get controller */
1012 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
1013 .name = "RX Sample Rate",
1014 .access = SNDRV_CTL_ELEM_ACCESS_READ |
1015 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1016 .info = fsl_spdif_rxrate_info,
1017 .get = fsl_spdif_rxrate_get,
1019 /* User bit sync mode set/get controller */
1021 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
1022 .name = "IEC958 USyncMode CDText",
1023 .access = SNDRV_CTL_ELEM_ACCESS_READ |
1024 SNDRV_CTL_ELEM_ACCESS_WRITE |
1025 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1026 .info = snd_ctl_boolean_mono_info,
1027 .get = fsl_spdif_usync_get,
1028 .put = fsl_spdif_usync_put,
1032 static int fsl_spdif_dai_probe(struct snd_soc_dai *dai)
1034 struct fsl_spdif_priv *spdif_private = snd_soc_dai_get_drvdata(dai);
1036 snd_soc_dai_init_dma_data(dai, &spdif_private->dma_params_tx,
1037 &spdif_private->dma_params_rx);
1039 snd_soc_add_dai_controls(dai, fsl_spdif_ctrls, ARRAY_SIZE(fsl_spdif_ctrls));
1041 /*Clear the val bit for Tx*/
1042 regmap_update_bits(spdif_private->regmap, REG_SPDIF_SCR,
1043 SCR_VAL_MASK, SCR_VAL_CLEAR);
1048 static struct snd_soc_dai_driver fsl_spdif_dai = {
1049 .probe = &fsl_spdif_dai_probe,
1051 .stream_name = "CPU-Playback",
1054 .rates = FSL_SPDIF_RATES_PLAYBACK,
1055 .formats = FSL_SPDIF_FORMATS_PLAYBACK,
1058 .stream_name = "CPU-Capture",
1061 .rates = FSL_SPDIF_RATES_CAPTURE,
1062 .formats = FSL_SPDIF_FORMATS_CAPTURE,
1064 .ops = &fsl_spdif_dai_ops,
1067 static const struct snd_soc_component_driver fsl_spdif_component = {
1068 .name = "fsl-spdif",
1071 /* FSL SPDIF REGMAP */
1072 static const struct reg_default fsl_spdif_reg_defaults[] = {
1073 {REG_SPDIF_SCR, 0x00000400},
1074 {REG_SPDIF_SRCD, 0x00000000},
1075 {REG_SPDIF_SIE, 0x00000000},
1076 {REG_SPDIF_STL, 0x00000000},
1077 {REG_SPDIF_STR, 0x00000000},
1078 {REG_SPDIF_STCSCH, 0x00000000},
1079 {REG_SPDIF_STCSCL, 0x00000000},
1080 {REG_SPDIF_STC, 0x00020f00},
1083 static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg)
1087 case REG_SPDIF_SRCD:
1088 case REG_SPDIF_SRPC:
1093 case REG_SPDIF_SRCSH:
1094 case REG_SPDIF_SRCSL:
1097 case REG_SPDIF_STCSCH:
1098 case REG_SPDIF_STCSCL:
1099 case REG_SPDIF_SRFM:
1107 static bool fsl_spdif_volatile_reg(struct device *dev, unsigned int reg)
1110 case REG_SPDIF_SRPC:
1114 case REG_SPDIF_SRCSH:
1115 case REG_SPDIF_SRCSL:
1118 case REG_SPDIF_SRFM:
1125 static bool fsl_spdif_writeable_reg(struct device *dev, unsigned int reg)
1129 case REG_SPDIF_SRCD:
1130 case REG_SPDIF_SRPC:
1135 case REG_SPDIF_STCSCH:
1136 case REG_SPDIF_STCSCL:
1144 static const struct regmap_config fsl_spdif_regmap_config = {
1149 .max_register = REG_SPDIF_STC,
1150 .reg_defaults = fsl_spdif_reg_defaults,
1151 .num_reg_defaults = ARRAY_SIZE(fsl_spdif_reg_defaults),
1152 .readable_reg = fsl_spdif_readable_reg,
1153 .volatile_reg = fsl_spdif_volatile_reg,
1154 .writeable_reg = fsl_spdif_writeable_reg,
1155 .cache_type = REGCACHE_FLAT,
1158 static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
1159 struct clk *clk, u64 savesub,
1160 enum spdif_txrate index, bool round)
1162 static const u32 rate[] = { 32000, 44100, 48000, 88200, 96000, 176400,
1164 bool is_sysclk = clk_is_match(clk, spdif_priv->sysclk);
1165 u64 rate_ideal, rate_actual, sub;
1167 u16 sysclk_dfmin, sysclk_dfmax, sysclk_df;
1170 /* The sysclk has an extra divisor [2, 512] */
1171 sysclk_dfmin = is_sysclk ? 2 : 1;
1172 sysclk_dfmax = is_sysclk ? 512 : 1;
1174 for (sysclk_df = sysclk_dfmin; sysclk_df <= sysclk_dfmax; sysclk_df++) {
1175 for (txclk_df = 1; txclk_df <= 128; txclk_df++) {
1176 rate_ideal = rate[index] * txclk_df * 64ULL;
1178 rate_actual = clk_round_rate(clk, rate_ideal);
1180 rate_actual = clk_get_rate(clk);
1182 arate = rate_actual / 64;
1183 arate /= txclk_df * sysclk_df;
1185 if (arate == rate[index]) {
1188 spdif_priv->txclk_df[index] = txclk_df;
1189 spdif_priv->sysclk_df[index] = sysclk_df;
1190 spdif_priv->txrate[index] = arate;
1192 } else if (arate / rate[index] == 1) {
1193 /* A little bigger than expect */
1194 sub = (u64)(arate - rate[index]) * 100000;
1195 do_div(sub, rate[index]);
1199 spdif_priv->txclk_df[index] = txclk_df;
1200 spdif_priv->sysclk_df[index] = sysclk_df;
1201 spdif_priv->txrate[index] = arate;
1202 } else if (rate[index] / arate == 1) {
1203 /* A little smaller than expect */
1204 sub = (u64)(rate[index] - arate) * 100000;
1205 do_div(sub, rate[index]);
1209 spdif_priv->txclk_df[index] = txclk_df;
1210 spdif_priv->sysclk_df[index] = sysclk_df;
1211 spdif_priv->txrate[index] = arate;
1220 static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
1221 enum spdif_txrate index)
1223 static const u32 rate[] = { 32000, 44100, 48000, 88200, 96000, 176400,
1225 struct platform_device *pdev = spdif_priv->pdev;
1226 struct device *dev = &pdev->dev;
1227 u64 savesub = 100000, ret;
1232 for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
1233 sprintf(tmp, "rxtx%d", i);
1234 clk = devm_clk_get(dev, tmp);
1236 dev_err(dev, "no rxtx%d clock in devicetree\n", i);
1237 return PTR_ERR(clk);
1239 if (!clk_get_rate(clk))
1242 ret = fsl_spdif_txclk_caldiv(spdif_priv, clk, savesub, index,
1243 fsl_spdif_can_set_clk_rate(spdif_priv, i));
1248 spdif_priv->txclk[index] = clk;
1249 spdif_priv->txclk_src[index] = i;
1251 /* To quick catch a divisor, we allow a 0.1% deviation */
1256 dev_dbg(dev, "use rxtx%d as tx clock source for %dHz sample rate\n",
1257 spdif_priv->txclk_src[index], rate[index]);
1258 dev_dbg(dev, "use txclk df %d for %dHz sample rate\n",
1259 spdif_priv->txclk_df[index], rate[index]);
1260 if (clk_is_match(spdif_priv->txclk[index], spdif_priv->sysclk))
1261 dev_dbg(dev, "use sysclk df %d for %dHz sample rate\n",
1262 spdif_priv->sysclk_df[index], rate[index]);
1263 dev_dbg(dev, "the best rate for %dHz sample rate is %dHz\n",
1264 rate[index], spdif_priv->txrate[index]);
1269 static int fsl_spdif_probe(struct platform_device *pdev)
1271 struct fsl_spdif_priv *spdif_priv;
1272 struct spdif_mixer_control *ctrl;
1273 struct resource *res;
1277 spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
1281 spdif_priv->pdev = pdev;
1283 spdif_priv->soc = of_device_get_match_data(&pdev->dev);
1285 /* Initialize this copy of the CPU DAI driver structure */
1286 memcpy(&spdif_priv->cpu_dai_drv, &fsl_spdif_dai, sizeof(fsl_spdif_dai));
1287 spdif_priv->cpu_dai_drv.name = dev_name(&pdev->dev);
1288 spdif_priv->cpu_dai_drv.playback.formats =
1289 spdif_priv->soc->tx_formats;
1291 /* Get the addresses and IRQ */
1292 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1293 regs = devm_ioremap_resource(&pdev->dev, res);
1295 return PTR_ERR(regs);
1297 spdif_priv->regmap = devm_regmap_init_mmio(&pdev->dev, regs, &fsl_spdif_regmap_config);
1298 if (IS_ERR(spdif_priv->regmap)) {
1299 dev_err(&pdev->dev, "regmap init failed\n");
1300 return PTR_ERR(spdif_priv->regmap);
1303 for (i = 0; i < spdif_priv->soc->interrupts; i++) {
1304 irq = platform_get_irq(pdev, i);
1306 dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
1310 ret = devm_request_irq(&pdev->dev, irq, spdif_isr, 0,
1311 dev_name(&pdev->dev), spdif_priv);
1313 dev_err(&pdev->dev, "could not claim irq %u\n", irq);
1318 /* Get system clock for rx clock rate calculation */
1319 spdif_priv->sysclk = devm_clk_get(&pdev->dev, "rxtx5");
1320 if (IS_ERR(spdif_priv->sysclk)) {
1321 dev_err(&pdev->dev, "no sys clock (rxtx5) in devicetree\n");
1322 return PTR_ERR(spdif_priv->sysclk);
1325 /* Get core clock for data register access via DMA */
1326 spdif_priv->coreclk = devm_clk_get(&pdev->dev, "core");
1327 if (IS_ERR(spdif_priv->coreclk)) {
1328 dev_err(&pdev->dev, "no core clock in devicetree\n");
1329 return PTR_ERR(spdif_priv->coreclk);
1332 spdif_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
1333 if (IS_ERR(spdif_priv->spbaclk))
1334 dev_warn(&pdev->dev, "no spba clock in devicetree\n");
1336 /* Select clock source for rx/tx clock */
1337 spdif_priv->rxclk = devm_clk_get(&pdev->dev, "rxtx1");
1338 if (IS_ERR(spdif_priv->rxclk)) {
1339 dev_err(&pdev->dev, "no rxtx1 clock in devicetree\n");
1340 return PTR_ERR(spdif_priv->rxclk);
1342 spdif_priv->rxclk_src = DEFAULT_RXCLK_SRC;
1344 for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
1345 ret = fsl_spdif_probe_txclk(spdif_priv, i);
1350 /* Initial spinlock for control data */
1351 ctrl = &spdif_priv->fsl_spdif_control;
1352 spin_lock_init(&ctrl->ctl_lock);
1354 /* Init tx channel status default value */
1355 ctrl->ch_status[0] = IEC958_AES0_CON_NOT_COPYRIGHT |
1356 IEC958_AES0_CON_EMPHASIS_5015;
1357 ctrl->ch_status[1] = IEC958_AES1_CON_DIGDIGCONV_ID;
1358 ctrl->ch_status[2] = 0x00;
1359 ctrl->ch_status[3] = IEC958_AES3_CON_FS_44100 |
1360 IEC958_AES3_CON_CLOCK_1000PPM;
1362 spdif_priv->dpll_locked = false;
1364 spdif_priv->dma_params_tx.maxburst = spdif_priv->soc->tx_burst;
1365 spdif_priv->dma_params_rx.maxburst = spdif_priv->soc->rx_burst;
1366 spdif_priv->dma_params_tx.addr = res->start + REG_SPDIF_STL;
1367 spdif_priv->dma_params_rx.addr = res->start + REG_SPDIF_SRL;
1369 /* Register with ASoC */
1370 dev_set_drvdata(&pdev->dev, spdif_priv);
1371 pm_runtime_enable(&pdev->dev);
1372 regcache_cache_only(spdif_priv->regmap, true);
1374 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_spdif_component,
1375 &spdif_priv->cpu_dai_drv, 1);
1377 dev_err(&pdev->dev, "failed to register DAI: %d\n", ret);
1381 ret = imx_pcm_dma_init(pdev, IMX_SPDIF_DMABUF_SIZE);
1382 if (ret && ret != -EPROBE_DEFER)
1383 dev_err(&pdev->dev, "imx_pcm_dma_init failed: %d\n", ret);
1389 static int fsl_spdif_runtime_suspend(struct device *dev)
1391 struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
1394 regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
1395 &spdif_priv->regcache_srpc);
1396 regcache_cache_only(spdif_priv->regmap, true);
1398 clk_disable_unprepare(spdif_priv->rxclk);
1400 for (i = 0; i < SPDIF_TXRATE_MAX; i++)
1401 clk_disable_unprepare(spdif_priv->txclk[i]);
1403 if (!IS_ERR(spdif_priv->spbaclk))
1404 clk_disable_unprepare(spdif_priv->spbaclk);
1405 clk_disable_unprepare(spdif_priv->coreclk);
1410 static int fsl_spdif_runtime_resume(struct device *dev)
1412 struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
1416 ret = clk_prepare_enable(spdif_priv->coreclk);
1418 dev_err(dev, "failed to enable core clock\n");
1422 if (!IS_ERR(spdif_priv->spbaclk)) {
1423 ret = clk_prepare_enable(spdif_priv->spbaclk);
1425 dev_err(dev, "failed to enable spba clock\n");
1426 goto disable_core_clk;
1430 for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
1431 ret = clk_prepare_enable(spdif_priv->txclk[i]);
1433 goto disable_tx_clk;
1436 ret = clk_prepare_enable(spdif_priv->rxclk);
1438 goto disable_tx_clk;
1440 regcache_cache_only(spdif_priv->regmap, false);
1441 regcache_mark_dirty(spdif_priv->regmap);
1443 regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC,
1444 SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
1445 spdif_priv->regcache_srpc);
1447 ret = regcache_sync(spdif_priv->regmap);
1449 goto disable_rx_clk;
1454 clk_disable_unprepare(spdif_priv->rxclk);
1456 for (i--; i >= 0; i--)
1457 clk_disable_unprepare(spdif_priv->txclk[i]);
1458 if (!IS_ERR(spdif_priv->spbaclk))
1459 clk_disable_unprepare(spdif_priv->spbaclk);
1461 clk_disable_unprepare(spdif_priv->coreclk);
1465 #endif /* CONFIG_PM */
1467 static const struct dev_pm_ops fsl_spdif_pm = {
1468 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1469 pm_runtime_force_resume)
1470 SET_RUNTIME_PM_OPS(fsl_spdif_runtime_suspend, fsl_spdif_runtime_resume,
1474 static const struct of_device_id fsl_spdif_dt_ids[] = {
1475 { .compatible = "fsl,imx35-spdif", .data = &fsl_spdif_imx35, },
1476 { .compatible = "fsl,vf610-spdif", .data = &fsl_spdif_vf610, },
1477 { .compatible = "fsl,imx6sx-spdif", .data = &fsl_spdif_imx6sx, },
1478 { .compatible = "fsl,imx8qm-spdif", .data = &fsl_spdif_imx8qm, },
1481 MODULE_DEVICE_TABLE(of, fsl_spdif_dt_ids);
1483 static struct platform_driver fsl_spdif_driver = {
1485 .name = "fsl-spdif-dai",
1486 .of_match_table = fsl_spdif_dt_ids,
1487 .pm = &fsl_spdif_pm,
1489 .probe = fsl_spdif_probe,
1492 module_platform_driver(fsl_spdif_driver);
1494 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1495 MODULE_DESCRIPTION("Freescale S/PDIF CPU DAI Driver");
1496 MODULE_LICENSE("GPL v2");
1497 MODULE_ALIAS("platform:fsl-spdif-dai");