xref: /linux/sound/soc/fsl/fsl_spdif.c (revision e5c91aac491def6ab3f90c4cc246e3fcb0f8f058)
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
4 //
5 // Copyright (C) 2013 Freescale Semiconductor, Inc.
6 //
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
11 
12 #include <linux/bitrev.h>
13 #include <linux/clk.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/regmap.h>
17 #include <linux/pm_runtime.h>
18 
19 #include <sound/asoundef.h>
20 #include <sound/dmaengine_pcm.h>
21 #include <sound/soc.h>
22 
23 #include "fsl_spdif.h"
24 #include "fsl_utils.h"
25 #include "imx-pcm.h"
26 
27 #define FSL_SPDIF_TXFIFO_WML	0x8
28 #define FSL_SPDIF_RXFIFO_WML	0x8
29 
30 #define INTR_FOR_PLAYBACK	(INT_TXFIFO_RESYNC)
31 #define INTR_FOR_CAPTURE	(INT_SYM_ERR | INT_BIT_ERR | INT_URX_FUL |\
32 				INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |\
33 				INT_UQ_SYNC | INT_UQ_ERR | INT_RXFIFO_RESYNC |\
34 				INT_LOSS_LOCK | INT_DPLL_LOCKED)
35 
36 #define SIE_INTR_FOR(tx)	(tx ? INTR_FOR_PLAYBACK : INTR_FOR_CAPTURE)
37 
38 /* Index list for the values that has if (DPLL Locked) condition */
39 static u8 srpc_dpll_locked[] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0xa, 0xb };
40 #define SRPC_NODPLL_START1	0x5
41 #define SRPC_NODPLL_START2	0xc
42 
43 #define DEFAULT_RXCLK_SRC	1
44 
45 #define RX_SAMPLE_RATE_KCONTROL "RX Sample Rate"
46 
47 /**
48  * struct fsl_spdif_soc_data: soc specific data
49  *
50  * @imx: for imx platform
51  * @shared_root_clock: flag of sharing a clock source with others;
52  *                     so the driver shouldn't set root clock rate
53  * @raw_capture_mode: if raw capture mode support
54  * @cchannel_192b: if there are registers for 192bits C channel data
55  * @interrupts: interrupt number
56  * @tx_burst: tx maxburst size
57  * @rx_burst: rx maxburst size
58  * @tx_formats: tx supported data format
59  */
60 struct fsl_spdif_soc_data {
61 	bool imx;
62 	bool shared_root_clock;
63 	bool raw_capture_mode;
64 	bool cchannel_192b;
65 	u32 interrupts;
66 	u32 tx_burst;
67 	u32 rx_burst;
68 	u64 tx_formats;
69 };
70 
71 /*
72  * SPDIF control structure
73  * Defines channel status, subcode and Q sub
74  */
75 struct spdif_mixer_control {
76 	/* spinlock to access control data */
77 	spinlock_t ctl_lock;
78 
79 	/* IEC958 channel tx status bit */
80 	unsigned char ch_status[4];
81 
82 	/* User bits */
83 	unsigned char subcode[2 * SPDIF_UBITS_SIZE];
84 
85 	/* Q subcode part of user bits */
86 	unsigned char qsub[2 * SPDIF_QSUB_SIZE];
87 
88 	/* Buffer offset for U/Q */
89 	u32 upos;
90 	u32 qpos;
91 
92 	/* Ready buffer index of the two buffers */
93 	u32 ready_buf;
94 };
95 
96 /**
97  * struct fsl_spdif_priv - Freescale SPDIF private data
98  * @soc: SPDIF soc data
99  * @fsl_spdif_control: SPDIF control data
100  * @cpu_dai_drv: cpu dai driver
101  * @snd_card: sound card pointer
102  * @rxrate_kcontrol: kcontrol for RX Sample Rate
103  * @pdev: platform device pointer
104  * @regmap: regmap handler
105  * @dpll_locked: dpll lock flag
106  * @txrate: the best rates for playback
107  * @txclk_df: STC_TXCLK_DF dividers value for playback
108  * @sysclk_df: STC_SYSCLK_DF dividers value for playback
109  * @txclk_src: STC_TXCLK_SRC values for playback
110  * @rxclk_src: SRPC_CLKSRC_SEL values for capture
111  * @txclk: tx clock sources for playback
112  * @rxclk: rx clock sources for capture
113  * @coreclk: core clock for register access via DMA
114  * @sysclk: system clock for rx clock rate measurement
115  * @spbaclk: SPBA clock (optional, depending on SoC design)
116  * @dma_params_tx: DMA parameters for transmit channel
117  * @dma_params_rx: DMA parameters for receive channel
118  * @regcache_srpc: regcache for SRPC
119  * @bypass: status of bypass input to output
120  * @pll8k_clk: PLL clock for the rate of multiply of 8kHz
121  * @pll11k_clk: PLL clock for the rate of multiply of 11kHz
122  */
123 struct fsl_spdif_priv {
124 	const struct fsl_spdif_soc_data *soc;
125 	struct spdif_mixer_control fsl_spdif_control;
126 	struct snd_soc_dai_driver cpu_dai_drv;
127 	struct snd_card *snd_card;
128 	struct snd_kcontrol *rxrate_kcontrol;
129 	struct platform_device *pdev;
130 	struct regmap *regmap;
131 	bool dpll_locked;
132 	u32 txrate[SPDIF_TXRATE_MAX];
133 	u8 txclk_df[SPDIF_TXRATE_MAX];
134 	u16 sysclk_df[SPDIF_TXRATE_MAX];
135 	u8 txclk_src[SPDIF_TXRATE_MAX];
136 	u8 rxclk_src;
137 	struct clk *txclk[STC_TXCLK_SRC_MAX];
138 	struct clk *rxclk;
139 	struct clk *coreclk;
140 	struct clk *sysclk;
141 	struct clk *spbaclk;
142 	struct snd_dmaengine_dai_dma_data dma_params_tx;
143 	struct snd_dmaengine_dai_dma_data dma_params_rx;
144 	/* regcache for SRPC */
145 	u32 regcache_srpc;
146 	bool bypass;
147 	struct clk *pll8k_clk;
148 	struct clk *pll11k_clk;
149 };
150 
151 static const struct fsl_spdif_soc_data fsl_spdif_vf610 = {
152 	.imx = false,
153 	.shared_root_clock = false,
154 	.raw_capture_mode = false,
155 	.interrupts = 1,
156 	.tx_burst = FSL_SPDIF_TXFIFO_WML,
157 	.rx_burst = FSL_SPDIF_RXFIFO_WML,
158 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
159 };
160 
161 static const struct fsl_spdif_soc_data fsl_spdif_imx35 = {
162 	.imx = true,
163 	.shared_root_clock = false,
164 	.raw_capture_mode = false,
165 	.interrupts = 1,
166 	.tx_burst = FSL_SPDIF_TXFIFO_WML,
167 	.rx_burst = FSL_SPDIF_RXFIFO_WML,
168 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
169 };
170 
171 static const struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
172 	.imx = true,
173 	.shared_root_clock = true,
174 	.raw_capture_mode = false,
175 	.interrupts = 1,
176 	.tx_burst = FSL_SPDIF_TXFIFO_WML,
177 	.rx_burst = FSL_SPDIF_RXFIFO_WML,
178 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
179 
180 };
181 
182 static const struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
183 	.imx = true,
184 	.shared_root_clock = true,
185 	.raw_capture_mode = false,
186 	.interrupts = 2,
187 	.tx_burst = 2,		/* Applied for EDMA */
188 	.rx_burst = 2,		/* Applied for EDMA */
189 	.tx_formats = SNDRV_PCM_FMTBIT_S24_LE,  /* Applied for EDMA */
190 };
191 
192 static const struct fsl_spdif_soc_data fsl_spdif_imx8mm = {
193 	.imx = true,
194 	.shared_root_clock = false,
195 	.raw_capture_mode = true,
196 	.interrupts = 1,
197 	.tx_burst = FSL_SPDIF_TXFIFO_WML,
198 	.rx_burst = FSL_SPDIF_RXFIFO_WML,
199 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
200 };
201 
202 static const struct fsl_spdif_soc_data fsl_spdif_imx8ulp = {
203 	.imx = true,
204 	.shared_root_clock = true,
205 	.raw_capture_mode = false,
206 	.interrupts = 1,
207 	.tx_burst = 2,		/* Applied for EDMA */
208 	.rx_burst = 2,		/* Applied for EDMA */
209 	.tx_formats = SNDRV_PCM_FMTBIT_S24_LE,	/* Applied for EDMA */
210 	.cchannel_192b = true,
211 };
212 
213 /* Check if clk is a root clock that does not share clock source with others */
214 static inline bool fsl_spdif_can_set_clk_rate(struct fsl_spdif_priv *spdif, int clk)
215 {
216 	return (clk == STC_TXCLK_SPDIF_ROOT) && !spdif->soc->shared_root_clock;
217 }
218 
219 /* DPLL locked and lock loss interrupt handler */
220 static void spdif_irq_dpll_lock(struct fsl_spdif_priv *spdif_priv)
221 {
222 	struct regmap *regmap = spdif_priv->regmap;
223 	struct platform_device *pdev = spdif_priv->pdev;
224 	u32 locked;
225 
226 	regmap_read(regmap, REG_SPDIF_SRPC, &locked);
227 	locked &= SRPC_DPLL_LOCKED;
228 
229 	dev_dbg(&pdev->dev, "isr: Rx dpll %s \n",
230 			locked ? "locked" : "loss lock");
231 
232 	spdif_priv->dpll_locked = locked ? true : false;
233 
234 	if (spdif_priv->snd_card && spdif_priv->rxrate_kcontrol) {
235 		snd_ctl_notify(spdif_priv->snd_card,
236 			       SNDRV_CTL_EVENT_MASK_VALUE,
237 			       &spdif_priv->rxrate_kcontrol->id);
238 	}
239 }
240 
241 /* Receiver found illegal symbol interrupt handler */
242 static void spdif_irq_sym_error(struct fsl_spdif_priv *spdif_priv)
243 {
244 	struct regmap *regmap = spdif_priv->regmap;
245 	struct platform_device *pdev = spdif_priv->pdev;
246 
247 	dev_dbg(&pdev->dev, "isr: receiver found illegal symbol\n");
248 
249 	/* Clear illegal symbol if DPLL unlocked since no audio stream */
250 	if (!spdif_priv->dpll_locked)
251 		regmap_update_bits(regmap, REG_SPDIF_SIE, INT_SYM_ERR, 0);
252 }
253 
254 /* U/Q Channel receive register full */
255 static void spdif_irq_uqrx_full(struct fsl_spdif_priv *spdif_priv, char name)
256 {
257 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
258 	struct regmap *regmap = spdif_priv->regmap;
259 	struct platform_device *pdev = spdif_priv->pdev;
260 	u32 *pos, size, val, reg;
261 
262 	switch (name) {
263 	case 'U':
264 		pos = &ctrl->upos;
265 		size = SPDIF_UBITS_SIZE;
266 		reg = REG_SPDIF_SRU;
267 		break;
268 	case 'Q':
269 		pos = &ctrl->qpos;
270 		size = SPDIF_QSUB_SIZE;
271 		reg = REG_SPDIF_SRQ;
272 		break;
273 	default:
274 		dev_err(&pdev->dev, "unsupported channel name\n");
275 		return;
276 	}
277 
278 	dev_dbg(&pdev->dev, "isr: %c Channel receive register full\n", name);
279 
280 	if (*pos >= size * 2) {
281 		*pos = 0;
282 	} else if (unlikely((*pos % size) + 3 > size)) {
283 		dev_err(&pdev->dev, "User bit receive buffer overflow\n");
284 		return;
285 	}
286 
287 	regmap_read(regmap, reg, &val);
288 	ctrl->subcode[*pos++] = val >> 16;
289 	ctrl->subcode[*pos++] = val >> 8;
290 	ctrl->subcode[*pos++] = val;
291 }
292 
293 /* U/Q Channel sync found */
294 static void spdif_irq_uq_sync(struct fsl_spdif_priv *spdif_priv)
295 {
296 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
297 	struct platform_device *pdev = spdif_priv->pdev;
298 
299 	dev_dbg(&pdev->dev, "isr: U/Q Channel sync found\n");
300 
301 	/* U/Q buffer reset */
302 	if (ctrl->qpos == 0)
303 		return;
304 
305 	/* Set ready to this buffer */
306 	ctrl->ready_buf = (ctrl->qpos - 1) / SPDIF_QSUB_SIZE + 1;
307 }
308 
309 /* U/Q Channel framing error */
310 static void spdif_irq_uq_err(struct fsl_spdif_priv *spdif_priv)
311 {
312 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
313 	struct regmap *regmap = spdif_priv->regmap;
314 	struct platform_device *pdev = spdif_priv->pdev;
315 	u32 val;
316 
317 	dev_dbg(&pdev->dev, "isr: U/Q Channel framing error\n");
318 
319 	/* Read U/Q data to clear the irq and do buffer reset */
320 	regmap_read(regmap, REG_SPDIF_SRU, &val);
321 	regmap_read(regmap, REG_SPDIF_SRQ, &val);
322 
323 	/* Drop this U/Q buffer */
324 	ctrl->ready_buf = 0;
325 	ctrl->upos = 0;
326 	ctrl->qpos = 0;
327 }
328 
329 /* Get spdif interrupt status and clear the interrupt */
330 static u32 spdif_intr_status_clear(struct fsl_spdif_priv *spdif_priv)
331 {
332 	struct regmap *regmap = spdif_priv->regmap;
333 	u32 val, val2;
334 
335 	regmap_read(regmap, REG_SPDIF_SIS, &val);
336 	regmap_read(regmap, REG_SPDIF_SIE, &val2);
337 
338 	regmap_write(regmap, REG_SPDIF_SIC, val & val2);
339 
340 	return val;
341 }
342 
343 static irqreturn_t spdif_isr(int irq, void *devid)
344 {
345 	struct fsl_spdif_priv *spdif_priv = (struct fsl_spdif_priv *)devid;
346 	struct platform_device *pdev = spdif_priv->pdev;
347 	u32 sis;
348 
349 	sis = spdif_intr_status_clear(spdif_priv);
350 
351 	if (sis & INT_DPLL_LOCKED)
352 		spdif_irq_dpll_lock(spdif_priv);
353 
354 	if (sis & INT_TXFIFO_UNOV)
355 		dev_dbg(&pdev->dev, "isr: Tx FIFO under/overrun\n");
356 
357 	if (sis & INT_TXFIFO_RESYNC)
358 		dev_dbg(&pdev->dev, "isr: Tx FIFO resync\n");
359 
360 	if (sis & INT_CNEW)
361 		dev_dbg(&pdev->dev, "isr: cstatus new\n");
362 
363 	if (sis & INT_VAL_NOGOOD)
364 		dev_dbg(&pdev->dev, "isr: validity flag no good\n");
365 
366 	if (sis & INT_SYM_ERR)
367 		spdif_irq_sym_error(spdif_priv);
368 
369 	if (sis & INT_BIT_ERR)
370 		dev_dbg(&pdev->dev, "isr: receiver found parity bit error\n");
371 
372 	if (sis & INT_URX_FUL)
373 		spdif_irq_uqrx_full(spdif_priv, 'U');
374 
375 	if (sis & INT_URX_OV)
376 		dev_dbg(&pdev->dev, "isr: U Channel receive register overrun\n");
377 
378 	if (sis & INT_QRX_FUL)
379 		spdif_irq_uqrx_full(spdif_priv, 'Q');
380 
381 	if (sis & INT_QRX_OV)
382 		dev_dbg(&pdev->dev, "isr: Q Channel receive register overrun\n");
383 
384 	if (sis & INT_UQ_SYNC)
385 		spdif_irq_uq_sync(spdif_priv);
386 
387 	if (sis & INT_UQ_ERR)
388 		spdif_irq_uq_err(spdif_priv);
389 
390 	if (sis & INT_RXFIFO_UNOV)
391 		dev_dbg(&pdev->dev, "isr: Rx FIFO under/overrun\n");
392 
393 	if (sis & INT_RXFIFO_RESYNC)
394 		dev_dbg(&pdev->dev, "isr: Rx FIFO resync\n");
395 
396 	if (sis & INT_LOSS_LOCK)
397 		spdif_irq_dpll_lock(spdif_priv);
398 
399 	/* FIXME: Write Tx FIFO to clear TxEm */
400 	if (sis & INT_TX_EM)
401 		dev_dbg(&pdev->dev, "isr: Tx FIFO empty\n");
402 
403 	/* FIXME: Read Rx FIFO to clear RxFIFOFul */
404 	if (sis & INT_RXFIFO_FUL)
405 		dev_dbg(&pdev->dev, "isr: Rx FIFO full\n");
406 
407 	return IRQ_HANDLED;
408 }
409 
410 static int spdif_softreset(struct fsl_spdif_priv *spdif_priv)
411 {
412 	struct regmap *regmap = spdif_priv->regmap;
413 	u32 val, cycle = 1000;
414 
415 	regcache_cache_bypass(regmap, true);
416 
417 	regmap_write(regmap, REG_SPDIF_SCR, SCR_SOFT_RESET);
418 
419 	/*
420 	 * RESET bit would be cleared after finishing its reset procedure,
421 	 * which typically lasts 8 cycles. 1000 cycles will keep it safe.
422 	 */
423 	do {
424 		regmap_read(regmap, REG_SPDIF_SCR, &val);
425 	} while ((val & SCR_SOFT_RESET) && cycle--);
426 
427 	regcache_cache_bypass(regmap, false);
428 	regcache_mark_dirty(regmap);
429 	regcache_sync(regmap);
430 
431 	if (cycle)
432 		return 0;
433 	else
434 		return -EBUSY;
435 }
436 
437 static void spdif_set_cstatus(struct spdif_mixer_control *ctrl,
438 				u8 mask, u8 cstatus)
439 {
440 	ctrl->ch_status[3] &= ~mask;
441 	ctrl->ch_status[3] |= cstatus & mask;
442 }
443 
444 static void spdif_write_channel_status(struct fsl_spdif_priv *spdif_priv)
445 {
446 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
447 	struct regmap *regmap = spdif_priv->regmap;
448 	struct platform_device *pdev = spdif_priv->pdev;
449 	u32 ch_status;
450 
451 	ch_status = (bitrev8(ctrl->ch_status[0]) << 16) |
452 		    (bitrev8(ctrl->ch_status[1]) << 8) |
453 		    bitrev8(ctrl->ch_status[2]);
454 	regmap_write(regmap, REG_SPDIF_STCSCH, ch_status);
455 
456 	dev_dbg(&pdev->dev, "STCSCH: 0x%06x\n", ch_status);
457 
458 	ch_status = bitrev8(ctrl->ch_status[3]) << 16;
459 	regmap_write(regmap, REG_SPDIF_STCSCL, ch_status);
460 
461 	dev_dbg(&pdev->dev, "STCSCL: 0x%06x\n", ch_status);
462 
463 	if (spdif_priv->soc->cchannel_192b) {
464 		ch_status = (bitrev8(ctrl->ch_status[0]) << 24) |
465 			    (bitrev8(ctrl->ch_status[1]) << 16) |
466 			    (bitrev8(ctrl->ch_status[2]) << 8) |
467 			    bitrev8(ctrl->ch_status[3]);
468 
469 		regmap_update_bits(regmap, REG_SPDIF_SCR, 0x1000000, 0x1000000);
470 
471 		/*
472 		 * The first 32bit should be in REG_SPDIF_STCCA_31_0 register,
473 		 * but here we need to set REG_SPDIF_STCCA_191_160 on 8ULP
474 		 * then can get correct result with HDMI analyzer capture.
475 		 * There is a hardware bug here.
476 		 */
477 		regmap_write(regmap, REG_SPDIF_STCCA_191_160, ch_status);
478 	}
479 }
480 
481 /* Set SPDIF PhaseConfig register for rx clock */
482 static int spdif_set_rx_clksrc(struct fsl_spdif_priv *spdif_priv,
483 				enum spdif_gainsel gainsel, int dpll_locked)
484 {
485 	struct regmap *regmap = spdif_priv->regmap;
486 	u8 clksrc = spdif_priv->rxclk_src;
487 
488 	if (clksrc >= SRPC_CLKSRC_MAX || gainsel >= GAINSEL_MULTI_MAX)
489 		return -EINVAL;
490 
491 	regmap_update_bits(regmap, REG_SPDIF_SRPC,
492 			SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
493 			SRPC_CLKSRC_SEL_SET(clksrc) | SRPC_GAINSEL_SET(gainsel));
494 
495 	return 0;
496 }
497 
498 static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv, enum spdif_txrate index);
499 
500 static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
501 				int sample_rate)
502 {
503 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
504 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
505 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
506 	struct regmap *regmap = spdif_priv->regmap;
507 	struct platform_device *pdev = spdif_priv->pdev;
508 	unsigned long csfs = 0;
509 	u32 stc, mask, rate;
510 	u16 sysclk_df;
511 	u8 clk, txclk_df;
512 	int ret;
513 
514 	switch (sample_rate) {
515 	case 22050:
516 		rate = SPDIF_TXRATE_22050;
517 		csfs = IEC958_AES3_CON_FS_22050;
518 		break;
519 	case 32000:
520 		rate = SPDIF_TXRATE_32000;
521 		csfs = IEC958_AES3_CON_FS_32000;
522 		break;
523 	case 44100:
524 		rate = SPDIF_TXRATE_44100;
525 		csfs = IEC958_AES3_CON_FS_44100;
526 		break;
527 	case 48000:
528 		rate = SPDIF_TXRATE_48000;
529 		csfs = IEC958_AES3_CON_FS_48000;
530 		break;
531 	case 88200:
532 		rate = SPDIF_TXRATE_88200;
533 		csfs = IEC958_AES3_CON_FS_88200;
534 		break;
535 	case 96000:
536 		rate = SPDIF_TXRATE_96000;
537 		csfs = IEC958_AES3_CON_FS_96000;
538 		break;
539 	case 176400:
540 		rate = SPDIF_TXRATE_176400;
541 		csfs = IEC958_AES3_CON_FS_176400;
542 		break;
543 	case 192000:
544 		rate = SPDIF_TXRATE_192000;
545 		csfs = IEC958_AES3_CON_FS_192000;
546 		break;
547 	default:
548 		dev_err(&pdev->dev, "unsupported sample rate %d\n", sample_rate);
549 		return -EINVAL;
550 	}
551 
552 	ret = fsl_spdif_probe_txclk(spdif_priv, rate);
553 	if (ret)
554 		return ret;
555 
556 	clk = spdif_priv->txclk_src[rate];
557 	if (clk >= STC_TXCLK_SRC_MAX) {
558 		dev_err(&pdev->dev, "tx clock source is out of range\n");
559 		return -EINVAL;
560 	}
561 
562 	txclk_df = spdif_priv->txclk_df[rate];
563 	if (txclk_df == 0) {
564 		dev_err(&pdev->dev, "the txclk_df can't be zero\n");
565 		return -EINVAL;
566 	}
567 
568 	sysclk_df = spdif_priv->sysclk_df[rate];
569 
570 	if (!fsl_spdif_can_set_clk_rate(spdif_priv, clk))
571 		goto clk_set_bypass;
572 
573 	/* The S/PDIF block needs a clock of 64 * fs * txclk_df */
574 	ret = clk_set_rate(spdif_priv->txclk[clk],
575 			   64 * sample_rate * txclk_df);
576 	if (ret) {
577 		dev_err(&pdev->dev, "failed to set tx clock rate\n");
578 		return ret;
579 	}
580 
581 clk_set_bypass:
582 	dev_dbg(&pdev->dev, "expected clock rate = %d\n",
583 			(64 * sample_rate * txclk_df * sysclk_df));
584 	dev_dbg(&pdev->dev, "actual clock rate = %ld\n",
585 			clk_get_rate(spdif_priv->txclk[clk]));
586 
587 	/* set fs field in consumer channel status */
588 	spdif_set_cstatus(ctrl, IEC958_AES3_CON_FS, csfs);
589 
590 	/* select clock source and divisor */
591 	stc = STC_TXCLK_ALL_EN | STC_TXCLK_SRC_SET(clk) |
592 	      STC_TXCLK_DF(txclk_df) | STC_SYSCLK_DF(sysclk_df);
593 	mask = STC_TXCLK_ALL_EN_MASK | STC_TXCLK_SRC_MASK |
594 	       STC_TXCLK_DF_MASK | STC_SYSCLK_DF_MASK;
595 	regmap_update_bits(regmap, REG_SPDIF_STC, mask, stc);
596 
597 	dev_dbg(&pdev->dev, "set sample rate to %dHz for %dHz playback\n",
598 			spdif_priv->txrate[rate], sample_rate);
599 
600 	return 0;
601 }
602 
603 static int fsl_spdif_startup(struct snd_pcm_substream *substream,
604 			     struct snd_soc_dai *cpu_dai)
605 {
606 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
607 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
608 	struct platform_device *pdev = spdif_priv->pdev;
609 	struct regmap *regmap = spdif_priv->regmap;
610 	u32 scr, mask;
611 	int ret;
612 
613 	/* Reset module and interrupts only for first initialization */
614 	if (!snd_soc_dai_active(cpu_dai)) {
615 		ret = spdif_softreset(spdif_priv);
616 		if (ret) {
617 			dev_err(&pdev->dev, "failed to soft reset\n");
618 			return ret;
619 		}
620 
621 		/* Disable all the interrupts */
622 		regmap_update_bits(regmap, REG_SPDIF_SIE, 0xffffff, 0);
623 	}
624 
625 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
626 		scr = SCR_TXFIFO_AUTOSYNC | SCR_TXFIFO_CTRL_NORMAL |
627 			SCR_TXSEL_NORMAL | SCR_USRC_SEL_CHIP |
628 			SCR_TXFIFO_FSEL_IF8;
629 		mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
630 			SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
631 			SCR_TXFIFO_FSEL_MASK;
632 	} else {
633 		scr = SCR_RXFIFO_FSEL_IF8 | SCR_RXFIFO_AUTOSYNC;
634 		mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
635 			SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
636 	}
637 	regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
638 
639 	/* Power up SPDIF module */
640 	regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_LOW_POWER, 0);
641 
642 	return 0;
643 }
644 
645 static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
646 				struct snd_soc_dai *cpu_dai)
647 {
648 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
649 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
650 	struct regmap *regmap = spdif_priv->regmap;
651 	u32 scr, mask;
652 
653 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
654 		scr = 0;
655 		mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
656 			SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
657 			SCR_TXFIFO_FSEL_MASK;
658 		/* Disable TX clock */
659 		regmap_update_bits(regmap, REG_SPDIF_STC, STC_TXCLK_ALL_EN_MASK, 0);
660 	} else {
661 		scr = SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO;
662 		mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
663 			SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
664 	}
665 	regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
666 
667 	/* Power down SPDIF module only if tx&rx are both inactive */
668 	if (!snd_soc_dai_active(cpu_dai)) {
669 		spdif_intr_status_clear(spdif_priv);
670 		regmap_update_bits(regmap, REG_SPDIF_SCR,
671 				SCR_LOW_POWER, SCR_LOW_POWER);
672 	}
673 }
674 
675 static int spdif_reparent_rootclk(struct fsl_spdif_priv *spdif_priv, unsigned int sample_rate)
676 {
677 	struct platform_device *pdev = spdif_priv->pdev;
678 	struct clk *clk;
679 	int ret;
680 
681 	/* Reparent clock if required condition is true */
682 	if (!fsl_spdif_can_set_clk_rate(spdif_priv, STC_TXCLK_SPDIF_ROOT))
683 		return 0;
684 
685 	/* Get root clock */
686 	clk = spdif_priv->txclk[STC_TXCLK_SPDIF_ROOT];
687 
688 	/* Disable clock first, for it was enabled by pm_runtime */
689 	clk_disable_unprepare(clk);
690 	fsl_asoc_reparent_pll_clocks(&pdev->dev, clk, spdif_priv->pll8k_clk,
691 				     spdif_priv->pll11k_clk, sample_rate);
692 	ret = clk_prepare_enable(clk);
693 	if (ret)
694 		return ret;
695 
696 	return 0;
697 }
698 static int fsl_spdif_hw_params(struct snd_pcm_substream *substream,
699 				struct snd_pcm_hw_params *params,
700 				struct snd_soc_dai *dai)
701 {
702 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
703 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
704 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
705 	struct platform_device *pdev = spdif_priv->pdev;
706 	u32 sample_rate = params_rate(params);
707 	int ret = 0;
708 
709 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
710 		ret = spdif_reparent_rootclk(spdif_priv, sample_rate);
711 		if (ret) {
712 			dev_err(&pdev->dev, "%s: reparent root clk failed: %d\n",
713 				__func__, sample_rate);
714 			return ret;
715 		}
716 
717 		ret  = spdif_set_sample_rate(substream, sample_rate);
718 		if (ret) {
719 			dev_err(&pdev->dev, "%s: set sample rate failed: %d\n",
720 					__func__, sample_rate);
721 			return ret;
722 		}
723 		spdif_set_cstatus(ctrl, IEC958_AES3_CON_CLOCK,
724 				  IEC958_AES3_CON_CLOCK_1000PPM);
725 		spdif_write_channel_status(spdif_priv);
726 	} else {
727 		/* Setup rx clock source */
728 		ret = spdif_set_rx_clksrc(spdif_priv, SPDIF_DEFAULT_GAINSEL, 1);
729 	}
730 
731 	return ret;
732 }
733 
734 static int fsl_spdif_trigger(struct snd_pcm_substream *substream,
735 				int cmd, struct snd_soc_dai *dai)
736 {
737 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
738 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
739 	struct regmap *regmap = spdif_priv->regmap;
740 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
741 	u32 intr = SIE_INTR_FOR(tx);
742 	u32 dmaen = SCR_DMA_xX_EN(tx);
743 
744 	switch (cmd) {
745 	case SNDRV_PCM_TRIGGER_START:
746 	case SNDRV_PCM_TRIGGER_RESUME:
747 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
748 		regmap_update_bits(regmap, REG_SPDIF_SIE, intr, intr);
749 		regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, dmaen);
750 		break;
751 	case SNDRV_PCM_TRIGGER_STOP:
752 	case SNDRV_PCM_TRIGGER_SUSPEND:
753 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
754 		regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, 0);
755 		regmap_update_bits(regmap, REG_SPDIF_SIE, intr, 0);
756 		regmap_write(regmap, REG_SPDIF_STL, 0x0);
757 		regmap_write(regmap, REG_SPDIF_STR, 0x0);
758 		break;
759 	default:
760 		return -EINVAL;
761 	}
762 
763 	return 0;
764 }
765 
766 /*
767  * FSL SPDIF IEC958 controller(mixer) functions
768  *
769  *	Channel status get/put control
770  *	User bit value get/put control
771  *	Valid bit value get control
772  *	DPLL lock status get control
773  *	User bit sync mode selection control
774  */
775 
776 static int fsl_spdif_info(struct snd_kcontrol *kcontrol,
777 				struct snd_ctl_elem_info *uinfo)
778 {
779 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
780 	uinfo->count = 1;
781 
782 	return 0;
783 }
784 
785 static int fsl_spdif_pb_get(struct snd_kcontrol *kcontrol,
786 				struct snd_ctl_elem_value *uvalue)
787 {
788 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
789 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
790 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
791 
792 	uvalue->value.iec958.status[0] = ctrl->ch_status[0];
793 	uvalue->value.iec958.status[1] = ctrl->ch_status[1];
794 	uvalue->value.iec958.status[2] = ctrl->ch_status[2];
795 	uvalue->value.iec958.status[3] = ctrl->ch_status[3];
796 
797 	return 0;
798 }
799 
800 static int fsl_spdif_pb_put(struct snd_kcontrol *kcontrol,
801 				struct snd_ctl_elem_value *uvalue)
802 {
803 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
804 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
805 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
806 
807 	ctrl->ch_status[0] = uvalue->value.iec958.status[0];
808 	ctrl->ch_status[1] = uvalue->value.iec958.status[1];
809 	ctrl->ch_status[2] = uvalue->value.iec958.status[2];
810 	ctrl->ch_status[3] = uvalue->value.iec958.status[3];
811 
812 	spdif_write_channel_status(spdif_priv);
813 
814 	return 0;
815 }
816 
817 /* Get channel status from SPDIF_RX_CCHAN register */
818 static int fsl_spdif_capture_get(struct snd_kcontrol *kcontrol,
819 				struct snd_ctl_elem_value *ucontrol)
820 {
821 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
822 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
823 	struct regmap *regmap = spdif_priv->regmap;
824 	u32 cstatus, val;
825 
826 	regmap_read(regmap, REG_SPDIF_SIS, &val);
827 	if (!(val & INT_CNEW))
828 		return -EAGAIN;
829 
830 	regmap_read(regmap, REG_SPDIF_SRCSH, &cstatus);
831 	ucontrol->value.iec958.status[0] = (cstatus >> 16) & 0xFF;
832 	ucontrol->value.iec958.status[1] = (cstatus >> 8) & 0xFF;
833 	ucontrol->value.iec958.status[2] = cstatus & 0xFF;
834 
835 	regmap_read(regmap, REG_SPDIF_SRCSL, &cstatus);
836 	ucontrol->value.iec958.status[3] = (cstatus >> 16) & 0xFF;
837 	ucontrol->value.iec958.status[4] = (cstatus >> 8) & 0xFF;
838 	ucontrol->value.iec958.status[5] = cstatus & 0xFF;
839 
840 	/* Clear intr */
841 	regmap_write(regmap, REG_SPDIF_SIC, INT_CNEW);
842 
843 	return 0;
844 }
845 
846 /*
847  * Get User bits (subcode) from chip value which readed out
848  * in UChannel register.
849  */
850 static int fsl_spdif_subcode_get(struct snd_kcontrol *kcontrol,
851 				struct snd_ctl_elem_value *ucontrol)
852 {
853 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
854 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
855 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
856 	int ret = -EAGAIN;
857 
858 	guard(spinlock_irqsave)(&ctrl->ctl_lock);
859 	if (ctrl->ready_buf) {
860 		int idx = (ctrl->ready_buf - 1) * SPDIF_UBITS_SIZE;
861 		memcpy(&ucontrol->value.iec958.subcode[0],
862 				&ctrl->subcode[idx], SPDIF_UBITS_SIZE);
863 		ret = 0;
864 	}
865 
866 	return ret;
867 }
868 
869 /* Q-subcode information. The byte size is SPDIF_UBITS_SIZE/8 */
870 static int fsl_spdif_qinfo(struct snd_kcontrol *kcontrol,
871 				struct snd_ctl_elem_info *uinfo)
872 {
873 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
874 	uinfo->count = SPDIF_QSUB_SIZE;
875 
876 	return 0;
877 }
878 
879 /* Get Q subcode from chip value which readed out in QChannel register */
880 static int fsl_spdif_qget(struct snd_kcontrol *kcontrol,
881 				struct snd_ctl_elem_value *ucontrol)
882 {
883 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
884 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
885 	struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
886 	int ret = -EAGAIN;
887 
888 	guard(spinlock_irqsave)(&ctrl->ctl_lock);
889 	if (ctrl->ready_buf) {
890 		int idx = (ctrl->ready_buf - 1) * SPDIF_QSUB_SIZE;
891 		memcpy(&ucontrol->value.bytes.data[0],
892 				&ctrl->qsub[idx], SPDIF_QSUB_SIZE);
893 		ret = 0;
894 	}
895 
896 	return ret;
897 }
898 
899 /* Get valid good bit from interrupt status register */
900 static int fsl_spdif_rx_vbit_get(struct snd_kcontrol *kcontrol,
901 				 struct snd_ctl_elem_value *ucontrol)
902 {
903 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
904 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
905 	struct regmap *regmap = spdif_priv->regmap;
906 	u32 val;
907 
908 	regmap_read(regmap, REG_SPDIF_SIS, &val);
909 	ucontrol->value.integer.value[0] = (val & INT_VAL_NOGOOD) != 0;
910 	regmap_write(regmap, REG_SPDIF_SIC, INT_VAL_NOGOOD);
911 
912 	return 0;
913 }
914 
915 static int fsl_spdif_tx_vbit_get(struct snd_kcontrol *kcontrol,
916 				 struct snd_ctl_elem_value *ucontrol)
917 {
918 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
919 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
920 	struct regmap *regmap = spdif_priv->regmap;
921 	u32 val;
922 
923 	regmap_read(regmap, REG_SPDIF_SCR, &val);
924 	val = (val & SCR_VAL_MASK) >> SCR_VAL_OFFSET;
925 	val = 1 - val;
926 	ucontrol->value.integer.value[0] = val;
927 
928 	return 0;
929 }
930 
931 static int fsl_spdif_tx_vbit_put(struct snd_kcontrol *kcontrol,
932 				 struct snd_ctl_elem_value *ucontrol)
933 {
934 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
935 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
936 	struct regmap *regmap = spdif_priv->regmap;
937 	u32 val = (1 - ucontrol->value.integer.value[0]) << SCR_VAL_OFFSET;
938 
939 	regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_VAL_MASK, val);
940 
941 	return 0;
942 }
943 
944 static int fsl_spdif_rx_rcm_get(struct snd_kcontrol *kcontrol,
945 				struct snd_ctl_elem_value *ucontrol)
946 {
947 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
948 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
949 	struct regmap *regmap = spdif_priv->regmap;
950 	u32 val;
951 
952 	regmap_read(regmap, REG_SPDIF_SCR, &val);
953 	val = (val & SCR_RAW_CAPTURE_MODE) ? 1 : 0;
954 	ucontrol->value.integer.value[0] = val;
955 
956 	return 0;
957 }
958 
959 static int fsl_spdif_rx_rcm_put(struct snd_kcontrol *kcontrol,
960 				struct snd_ctl_elem_value *ucontrol)
961 {
962 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
963 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
964 	struct regmap *regmap = spdif_priv->regmap;
965 	u32 val = (ucontrol->value.integer.value[0] ? SCR_RAW_CAPTURE_MODE : 0);
966 
967 	if (val)
968 		cpu_dai->driver->capture.formats |= SNDRV_PCM_FMTBIT_S32_LE;
969 	else
970 		cpu_dai->driver->capture.formats &= ~SNDRV_PCM_FMTBIT_S32_LE;
971 
972 	regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_RAW_CAPTURE_MODE, val);
973 
974 	return 0;
975 }
976 
977 static int fsl_spdif_bypass_get(struct snd_kcontrol *kcontrol,
978 				struct snd_ctl_elem_value *ucontrol)
979 {
980 	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
981 	struct fsl_spdif_priv *priv = snd_soc_dai_get_drvdata(dai);
982 
983 	ucontrol->value.integer.value[0] = priv->bypass ? 1 : 0;
984 
985 	return 0;
986 }
987 
988 static int fsl_spdif_bypass_put(struct snd_kcontrol *kcontrol,
989 				struct snd_ctl_elem_value *ucontrol)
990 {
991 	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
992 	struct fsl_spdif_priv *priv = snd_soc_dai_get_drvdata(dai);
993 	struct snd_soc_card *card = dai->component->card;
994 	bool set = (ucontrol->value.integer.value[0] != 0);
995 	struct regmap *regmap = priv->regmap;
996 	struct snd_soc_pcm_runtime *rtd;
997 	u32 scr, mask;
998 	int stream;
999 
1000 	rtd = snd_soc_get_pcm_runtime(card, card->dai_link);
1001 
1002 	if (priv->bypass == set)
1003 		return 0; /* nothing to do */
1004 
1005 	if (snd_soc_dai_active(dai)) {
1006 		dev_err(dai->dev, "Cannot change BYPASS mode while stream is running.\n");
1007 		return -EBUSY;
1008 	}
1009 
1010 	pm_runtime_get_sync(dai->dev);
1011 
1012 	if (set) {
1013 		/* Disable interrupts */
1014 		regmap_update_bits(regmap, REG_SPDIF_SIE, 0xffffff, 0);
1015 
1016 		/* Configure BYPASS mode */
1017 		scr = SCR_TXSEL_RX | SCR_RXFIFO_OFF;
1018 		mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK |
1019 			SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK | SCR_TXSEL_MASK;
1020 		/* Power up SPDIF module */
1021 		mask |= SCR_LOW_POWER;
1022 	} else {
1023 		/* Power down SPDIF module, disable TX */
1024 		scr = SCR_LOW_POWER | SCR_TXSEL_OFF;
1025 		mask = SCR_LOW_POWER | SCR_TXSEL_MASK;
1026 	}
1027 
1028 	regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
1029 
1030 	/* Disable playback & capture if BYPASS mode is enabled, enable otherwise */
1031 	for_each_pcm_streams(stream)
1032 		rtd->pcm->streams[stream].substream_count = (set ? 0 : 1);
1033 
1034 	priv->bypass = set;
1035 	pm_runtime_put_sync(dai->dev);
1036 
1037 	return 0;
1038 }
1039 
1040 /* DPLL lock information */
1041 static int fsl_spdif_rxrate_info(struct snd_kcontrol *kcontrol,
1042 				struct snd_ctl_elem_info *uinfo)
1043 {
1044 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1045 	uinfo->count = 1;
1046 	uinfo->value.integer.min = 16000;
1047 	uinfo->value.integer.max = 192000;
1048 
1049 	return 0;
1050 }
1051 
1052 static u32 gainsel_multi[GAINSEL_MULTI_MAX] = {
1053 	24, 16, 12, 8, 6, 4, 3,
1054 };
1055 
1056 /* Get RX data clock rate given the SPDIF bus_clk */
1057 static int spdif_get_rxclk_rate(struct fsl_spdif_priv *spdif_priv,
1058 				enum spdif_gainsel gainsel)
1059 {
1060 	struct regmap *regmap = spdif_priv->regmap;
1061 	struct platform_device *pdev = spdif_priv->pdev;
1062 	u64 tmpval64, busclk_freq = 0;
1063 	u32 freqmeas, phaseconf;
1064 	u8 clksrc;
1065 
1066 	regmap_read(regmap, REG_SPDIF_SRFM, &freqmeas);
1067 	regmap_read(regmap, REG_SPDIF_SRPC, &phaseconf);
1068 
1069 	clksrc = (phaseconf >> SRPC_CLKSRC_SEL_OFFSET) & 0xf;
1070 
1071 	/* Get bus clock from system */
1072 	if (srpc_dpll_locked[clksrc] && (phaseconf & SRPC_DPLL_LOCKED))
1073 		busclk_freq = clk_get_rate(spdif_priv->sysclk);
1074 
1075 	/* FreqMeas_CLK = (BUS_CLK * FreqMeas) / 2 ^ 10 / GAINSEL / 128 */
1076 	tmpval64 = (u64) busclk_freq * freqmeas;
1077 	do_div(tmpval64, gainsel_multi[gainsel] * 1024);
1078 	do_div(tmpval64, 128 * 1024);
1079 
1080 	dev_dbg(&pdev->dev, "FreqMeas: %d\n", freqmeas);
1081 	dev_dbg(&pdev->dev, "BusclkFreq: %lld\n", busclk_freq);
1082 	dev_dbg(&pdev->dev, "RxRate: %lld\n", tmpval64);
1083 
1084 	return (int)tmpval64;
1085 }
1086 
1087 /*
1088  * Get DPLL lock or not info from stable interrupt status register.
1089  * User application must use this control to get locked,
1090  * then can do next PCM operation
1091  */
1092 static int fsl_spdif_rxrate_get(struct snd_kcontrol *kcontrol,
1093 				struct snd_ctl_elem_value *ucontrol)
1094 {
1095 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
1096 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
1097 	int rate = 0;
1098 
1099 	if (spdif_priv->dpll_locked)
1100 		rate = spdif_get_rxclk_rate(spdif_priv, SPDIF_DEFAULT_GAINSEL);
1101 
1102 	ucontrol->value.integer.value[0] = rate;
1103 
1104 	return 0;
1105 }
1106 
1107 /*
1108  * User bit sync mode:
1109  * 1 CD User channel subcode
1110  * 0 Non-CD data
1111  */
1112 static int fsl_spdif_usync_get(struct snd_kcontrol *kcontrol,
1113 			       struct snd_ctl_elem_value *ucontrol)
1114 {
1115 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
1116 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
1117 	struct regmap *regmap = spdif_priv->regmap;
1118 	u32 val;
1119 
1120 	regmap_read(regmap, REG_SPDIF_SRCD, &val);
1121 	ucontrol->value.integer.value[0] = (val & SRCD_CD_USER) != 0;
1122 
1123 	return 0;
1124 }
1125 
1126 /*
1127  * User bit sync mode:
1128  * 1 CD User channel subcode
1129  * 0 Non-CD data
1130  */
1131 static int fsl_spdif_usync_put(struct snd_kcontrol *kcontrol,
1132 				struct snd_ctl_elem_value *ucontrol)
1133 {
1134 	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
1135 	struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
1136 	struct regmap *regmap = spdif_priv->regmap;
1137 	u32 val = ucontrol->value.integer.value[0] << SRCD_CD_USER_OFFSET;
1138 
1139 	regmap_update_bits(regmap, REG_SPDIF_SRCD, SRCD_CD_USER, val);
1140 
1141 	return 0;
1142 }
1143 
1144 /* FSL SPDIF IEC958 controller defines */
1145 static const struct snd_kcontrol_new fsl_spdif_ctrls[] = {
1146 	/* Status cchanel controller */
1147 	{
1148 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1149 		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
1150 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1151 			SNDRV_CTL_ELEM_ACCESS_WRITE |
1152 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1153 		.info = fsl_spdif_info,
1154 		.get = fsl_spdif_pb_get,
1155 		.put = fsl_spdif_pb_put,
1156 	},
1157 	{
1158 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1159 		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
1160 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1161 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1162 		.info = fsl_spdif_info,
1163 		.get = fsl_spdif_capture_get,
1164 	},
1165 	/* User bits controller */
1166 	{
1167 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1168 		.name = "IEC958 Subcode Capture Default",
1169 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1170 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1171 		.info = fsl_spdif_info,
1172 		.get = fsl_spdif_subcode_get,
1173 	},
1174 	{
1175 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1176 		.name = "IEC958 Q-subcode Capture Default",
1177 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1178 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1179 		.info = fsl_spdif_qinfo,
1180 		.get = fsl_spdif_qget,
1181 	},
1182 	/* Valid bit error controller */
1183 	{
1184 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1185 		.name = "IEC958 RX V-Bit Errors",
1186 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1187 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1188 		.info = snd_ctl_boolean_mono_info,
1189 		.get = fsl_spdif_rx_vbit_get,
1190 	},
1191 	{
1192 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1193 		.name = "IEC958 TX V-Bit",
1194 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1195 			SNDRV_CTL_ELEM_ACCESS_WRITE |
1196 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1197 		.info = snd_ctl_boolean_mono_info,
1198 		.get = fsl_spdif_tx_vbit_get,
1199 		.put = fsl_spdif_tx_vbit_put,
1200 	},
1201 	/* DPLL lock info get controller */
1202 	{
1203 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1204 		.name = RX_SAMPLE_RATE_KCONTROL,
1205 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1206 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1207 		.info = fsl_spdif_rxrate_info,
1208 		.get = fsl_spdif_rxrate_get,
1209 	},
1210 	/* RX bypass controller */
1211 	{
1212 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1213 		.name = "Bypass Mode",
1214 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
1215 		.info = snd_ctl_boolean_mono_info,
1216 		.get = fsl_spdif_bypass_get,
1217 		.put = fsl_spdif_bypass_put,
1218 	},
1219 	/* User bit sync mode set/get controller */
1220 	{
1221 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1222 		.name = "IEC958 USyncMode CDText",
1223 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1224 			SNDRV_CTL_ELEM_ACCESS_WRITE |
1225 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1226 		.info = snd_ctl_boolean_mono_info,
1227 		.get = fsl_spdif_usync_get,
1228 		.put = fsl_spdif_usync_put,
1229 	},
1230 };
1231 
1232 static const struct snd_kcontrol_new fsl_spdif_ctrls_rcm[] = {
1233 	{
1234 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
1235 		.name = "IEC958 Raw Capture Mode",
1236 		.access = SNDRV_CTL_ELEM_ACCESS_READ |
1237 			SNDRV_CTL_ELEM_ACCESS_WRITE |
1238 			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1239 		.info = snd_ctl_boolean_mono_info,
1240 		.get = fsl_spdif_rx_rcm_get,
1241 		.put = fsl_spdif_rx_rcm_put,
1242 	},
1243 };
1244 
1245 static int fsl_spdif_dai_probe(struct snd_soc_dai *dai)
1246 {
1247 	struct fsl_spdif_priv *spdif_private = snd_soc_dai_get_drvdata(dai);
1248 
1249 	snd_soc_dai_init_dma_data(dai, &spdif_private->dma_params_tx,
1250 				  &spdif_private->dma_params_rx);
1251 
1252 	snd_soc_add_dai_controls(dai, fsl_spdif_ctrls, ARRAY_SIZE(fsl_spdif_ctrls));
1253 
1254 	if (spdif_private->soc->raw_capture_mode)
1255 		snd_soc_add_dai_controls(dai, fsl_spdif_ctrls_rcm,
1256 					 ARRAY_SIZE(fsl_spdif_ctrls_rcm));
1257 
1258 	spdif_private->snd_card = dai->component->card->snd_card;
1259 	spdif_private->rxrate_kcontrol = snd_soc_card_get_kcontrol(dai->component->card,
1260 								   RX_SAMPLE_RATE_KCONTROL);
1261 	if (!spdif_private->rxrate_kcontrol)
1262 		dev_err(&spdif_private->pdev->dev, "failed to get %s kcontrol\n",
1263 			RX_SAMPLE_RATE_KCONTROL);
1264 
1265 	/*Clear the val bit for Tx*/
1266 	regmap_update_bits(spdif_private->regmap, REG_SPDIF_SCR,
1267 			   SCR_VAL_MASK, SCR_VAL_CLEAR);
1268 
1269 	return 0;
1270 }
1271 
1272 static const struct snd_soc_dai_ops fsl_spdif_dai_ops = {
1273 	.probe		= fsl_spdif_dai_probe,
1274 	.startup	= fsl_spdif_startup,
1275 	.hw_params	= fsl_spdif_hw_params,
1276 	.trigger	= fsl_spdif_trigger,
1277 	.shutdown	= fsl_spdif_shutdown,
1278 };
1279 
1280 static struct snd_soc_dai_driver fsl_spdif_dai = {
1281 	.playback = {
1282 		.stream_name = "CPU-Playback",
1283 		.channels_min = 2,
1284 		.channels_max = 2,
1285 		.rates = FSL_SPDIF_RATES_PLAYBACK,
1286 		.formats = FSL_SPDIF_FORMATS_PLAYBACK,
1287 	},
1288 	.capture = {
1289 		.stream_name = "CPU-Capture",
1290 		.channels_min = 2,
1291 		.channels_max = 2,
1292 		.rates = FSL_SPDIF_RATES_CAPTURE,
1293 		.formats = FSL_SPDIF_FORMATS_CAPTURE,
1294 	},
1295 	.ops = &fsl_spdif_dai_ops,
1296 };
1297 
1298 static const struct snd_soc_component_driver fsl_spdif_component = {
1299 	.name			= "fsl-spdif",
1300 	.legacy_dai_naming	= 1,
1301 };
1302 
1303 /* FSL SPDIF REGMAP */
1304 static const struct reg_default fsl_spdif_reg_defaults[] = {
1305 	{REG_SPDIF_SCR,    0x00000400},
1306 	{REG_SPDIF_SRCD,   0x00000000},
1307 	{REG_SPDIF_SIE,	   0x00000000},
1308 	{REG_SPDIF_STL,	   0x00000000},
1309 	{REG_SPDIF_STR,	   0x00000000},
1310 	{REG_SPDIF_STCSCH, 0x00000000},
1311 	{REG_SPDIF_STCSCL, 0x00000000},
1312 	{REG_SPDIF_STCSPH, 0x00000000},
1313 	{REG_SPDIF_STCSPL, 0x00000000},
1314 	{REG_SPDIF_STC,	   0x00020f00},
1315 };
1316 
1317 static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg)
1318 {
1319 	switch (reg) {
1320 	case REG_SPDIF_SCR:
1321 	case REG_SPDIF_SRCD:
1322 	case REG_SPDIF_SRPC:
1323 	case REG_SPDIF_SIE:
1324 	case REG_SPDIF_SIS:
1325 	case REG_SPDIF_SRL:
1326 	case REG_SPDIF_SRR:
1327 	case REG_SPDIF_SRCSH:
1328 	case REG_SPDIF_SRCSL:
1329 	case REG_SPDIF_SRU:
1330 	case REG_SPDIF_SRQ:
1331 	case REG_SPDIF_STCSCH:
1332 	case REG_SPDIF_STCSCL:
1333 	case REG_SPDIF_STCSPH:
1334 	case REG_SPDIF_STCSPL:
1335 	case REG_SPDIF_SRFM:
1336 	case REG_SPDIF_STC:
1337 	case REG_SPDIF_SRCCA_31_0:
1338 	case REG_SPDIF_SRCCA_63_32:
1339 	case REG_SPDIF_SRCCA_95_64:
1340 	case REG_SPDIF_SRCCA_127_96:
1341 	case REG_SPDIF_SRCCA_159_128:
1342 	case REG_SPDIF_SRCCA_191_160:
1343 	case REG_SPDIF_STCCA_31_0:
1344 	case REG_SPDIF_STCCA_63_32:
1345 	case REG_SPDIF_STCCA_95_64:
1346 	case REG_SPDIF_STCCA_127_96:
1347 	case REG_SPDIF_STCCA_159_128:
1348 	case REG_SPDIF_STCCA_191_160:
1349 		return true;
1350 	default:
1351 		return false;
1352 	}
1353 }
1354 
1355 static bool fsl_spdif_volatile_reg(struct device *dev, unsigned int reg)
1356 {
1357 	switch (reg) {
1358 	case REG_SPDIF_SRPC:
1359 	case REG_SPDIF_SIS:
1360 	case REG_SPDIF_SRL:
1361 	case REG_SPDIF_SRR:
1362 	case REG_SPDIF_SRCSH:
1363 	case REG_SPDIF_SRCSL:
1364 	case REG_SPDIF_SRU:
1365 	case REG_SPDIF_SRQ:
1366 	case REG_SPDIF_SRFM:
1367 	case REG_SPDIF_SRCCA_31_0:
1368 	case REG_SPDIF_SRCCA_63_32:
1369 	case REG_SPDIF_SRCCA_95_64:
1370 	case REG_SPDIF_SRCCA_127_96:
1371 	case REG_SPDIF_SRCCA_159_128:
1372 	case REG_SPDIF_SRCCA_191_160:
1373 		return true;
1374 	default:
1375 		return false;
1376 	}
1377 }
1378 
1379 static bool fsl_spdif_writeable_reg(struct device *dev, unsigned int reg)
1380 {
1381 	switch (reg) {
1382 	case REG_SPDIF_SCR:
1383 	case REG_SPDIF_SRCD:
1384 	case REG_SPDIF_SRPC:
1385 	case REG_SPDIF_SIE:
1386 	case REG_SPDIF_SIC:
1387 	case REG_SPDIF_STL:
1388 	case REG_SPDIF_STR:
1389 	case REG_SPDIF_STCSCH:
1390 	case REG_SPDIF_STCSCL:
1391 	case REG_SPDIF_STCSPH:
1392 	case REG_SPDIF_STCSPL:
1393 	case REG_SPDIF_STC:
1394 	case REG_SPDIF_STCCA_31_0:
1395 	case REG_SPDIF_STCCA_63_32:
1396 	case REG_SPDIF_STCCA_95_64:
1397 	case REG_SPDIF_STCCA_127_96:
1398 	case REG_SPDIF_STCCA_159_128:
1399 	case REG_SPDIF_STCCA_191_160:
1400 		return true;
1401 	default:
1402 		return false;
1403 	}
1404 }
1405 
1406 static const struct regmap_config fsl_spdif_regmap_config = {
1407 	.reg_bits = 32,
1408 	.reg_stride = 4,
1409 	.val_bits = 32,
1410 
1411 	.max_register = REG_SPDIF_STCCA_191_160,
1412 	.reg_defaults = fsl_spdif_reg_defaults,
1413 	.num_reg_defaults = ARRAY_SIZE(fsl_spdif_reg_defaults),
1414 	.readable_reg = fsl_spdif_readable_reg,
1415 	.volatile_reg = fsl_spdif_volatile_reg,
1416 	.writeable_reg = fsl_spdif_writeable_reg,
1417 	.cache_type = REGCACHE_FLAT,
1418 };
1419 
1420 static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
1421 				struct clk *clk, u64 savesub,
1422 				enum spdif_txrate index, bool round)
1423 {
1424 	static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
1425 				    192000, };
1426 	bool is_sysclk = clk_is_match(clk, spdif_priv->sysclk);
1427 	u64 rate_ideal, rate_actual, sub;
1428 	u32 arate;
1429 	u16 sysclk_dfmin, sysclk_dfmax, sysclk_df;
1430 	u8 txclk_df;
1431 
1432 	/* The sysclk has an extra divisor [2, 512] */
1433 	sysclk_dfmin = is_sysclk ? 2 : 1;
1434 	sysclk_dfmax = is_sysclk ? 512 : 1;
1435 
1436 	for (sysclk_df = sysclk_dfmin; sysclk_df <= sysclk_dfmax; sysclk_df++) {
1437 		for (txclk_df = 1; txclk_df <= 128; txclk_df++) {
1438 			rate_ideal = rate[index] * txclk_df * 64ULL;
1439 			if (round)
1440 				rate_actual = clk_round_rate(clk, rate_ideal);
1441 			else
1442 				rate_actual = clk_get_rate(clk);
1443 
1444 			arate = rate_actual / 64;
1445 			arate /= txclk_df * sysclk_df;
1446 
1447 			if (arate == rate[index]) {
1448 				/* We are lucky */
1449 				savesub = 0;
1450 				spdif_priv->txclk_df[index] = txclk_df;
1451 				spdif_priv->sysclk_df[index] = sysclk_df;
1452 				spdif_priv->txrate[index] = arate;
1453 				goto out;
1454 			} else if (arate / rate[index] == 1) {
1455 				/* A little bigger than expect */
1456 				sub = (u64)(arate - rate[index]) * 100000;
1457 				do_div(sub, rate[index]);
1458 				if (sub >= savesub)
1459 					continue;
1460 				savesub = sub;
1461 				spdif_priv->txclk_df[index] = txclk_df;
1462 				spdif_priv->sysclk_df[index] = sysclk_df;
1463 				spdif_priv->txrate[index] = arate;
1464 			} else if (rate[index] / arate == 1) {
1465 				/* A little smaller than expect */
1466 				sub = (u64)(rate[index] - arate) * 100000;
1467 				do_div(sub, rate[index]);
1468 				if (sub >= savesub)
1469 					continue;
1470 				savesub = sub;
1471 				spdif_priv->txclk_df[index] = txclk_df;
1472 				spdif_priv->sysclk_df[index] = sysclk_df;
1473 				spdif_priv->txrate[index] = arate;
1474 			}
1475 		}
1476 	}
1477 
1478 out:
1479 	return savesub;
1480 }
1481 
1482 static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
1483 				enum spdif_txrate index)
1484 {
1485 	static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
1486 				    192000, };
1487 	struct platform_device *pdev = spdif_priv->pdev;
1488 	struct device *dev = &pdev->dev;
1489 	u64 savesub = 100000, ret;
1490 	struct clk *clk;
1491 	int i;
1492 
1493 	for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
1494 		clk = spdif_priv->txclk[i];
1495 		if (IS_ERR(clk)) {
1496 			dev_err(dev, "no rxtx%d clock in devicetree\n", i);
1497 			return PTR_ERR(clk);
1498 		}
1499 		if (!clk_get_rate(clk))
1500 			continue;
1501 
1502 		ret = fsl_spdif_txclk_caldiv(spdif_priv, clk, savesub, index,
1503 					     fsl_spdif_can_set_clk_rate(spdif_priv, i));
1504 		if (savesub == ret)
1505 			continue;
1506 
1507 		savesub = ret;
1508 		spdif_priv->txclk_src[index] = i;
1509 
1510 		/* To quick catch a divisor, we allow a 0.1% deviation */
1511 		if (savesub < 100)
1512 			break;
1513 	}
1514 
1515 	dev_dbg(dev, "use rxtx%d as tx clock source for %dHz sample rate\n",
1516 			spdif_priv->txclk_src[index], rate[index]);
1517 	dev_dbg(dev, "use txclk df %d for %dHz sample rate\n",
1518 			spdif_priv->txclk_df[index], rate[index]);
1519 	if (clk_is_match(spdif_priv->txclk[spdif_priv->txclk_src[index]], spdif_priv->sysclk))
1520 		dev_dbg(dev, "use sysclk df %d for %dHz sample rate\n",
1521 				spdif_priv->sysclk_df[index], rate[index]);
1522 	dev_dbg(dev, "the best rate for %dHz sample rate is %dHz\n",
1523 			rate[index], spdif_priv->txrate[index]);
1524 
1525 	return 0;
1526 }
1527 
1528 static int fsl_spdif_probe(struct platform_device *pdev)
1529 {
1530 	struct fsl_spdif_priv *spdif_priv;
1531 	struct spdif_mixer_control *ctrl;
1532 	struct resource *res;
1533 	void __iomem *regs;
1534 	int irq, ret, i;
1535 	char tmp[16];
1536 
1537 	spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
1538 	if (!spdif_priv)
1539 		return -ENOMEM;
1540 
1541 	spdif_priv->pdev = pdev;
1542 
1543 	spdif_priv->soc = of_device_get_match_data(&pdev->dev);
1544 
1545 	/* Initialize this copy of the CPU DAI driver structure */
1546 	memcpy(&spdif_priv->cpu_dai_drv, &fsl_spdif_dai, sizeof(fsl_spdif_dai));
1547 	spdif_priv->cpu_dai_drv.name = dev_name(&pdev->dev);
1548 	spdif_priv->cpu_dai_drv.playback.formats =
1549 				spdif_priv->soc->tx_formats;
1550 
1551 	/* Get the addresses and IRQ */
1552 	regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1553 	if (IS_ERR(regs))
1554 		return PTR_ERR(regs);
1555 
1556 	spdif_priv->regmap = devm_regmap_init_mmio(&pdev->dev, regs, &fsl_spdif_regmap_config);
1557 	if (IS_ERR(spdif_priv->regmap)) {
1558 		dev_err(&pdev->dev, "regmap init failed\n");
1559 		return PTR_ERR(spdif_priv->regmap);
1560 	}
1561 
1562 	for (i = 0; i < spdif_priv->soc->interrupts; i++) {
1563 		irq = platform_get_irq(pdev, i);
1564 		if (irq < 0)
1565 			return irq;
1566 
1567 		ret = devm_request_irq(&pdev->dev, irq, spdif_isr, 0,
1568 				       dev_name(&pdev->dev), spdif_priv);
1569 		if (ret) {
1570 			dev_err(&pdev->dev, "could not claim irq %u\n", irq);
1571 			return ret;
1572 		}
1573 	}
1574 
1575 	for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
1576 		sprintf(tmp, "rxtx%d", i);
1577 		spdif_priv->txclk[i] = devm_clk_get(&pdev->dev, tmp);
1578 		if (IS_ERR(spdif_priv->txclk[i])) {
1579 			dev_err(&pdev->dev, "no rxtx%d clock in devicetree\n", i);
1580 			return PTR_ERR(spdif_priv->txclk[i]);
1581 		}
1582 	}
1583 
1584 	/* Get system clock for rx clock rate calculation */
1585 	spdif_priv->sysclk = spdif_priv->txclk[5];
1586 	if (IS_ERR(spdif_priv->sysclk)) {
1587 		dev_err(&pdev->dev, "no sys clock (rxtx5) in devicetree\n");
1588 		return PTR_ERR(spdif_priv->sysclk);
1589 	}
1590 
1591 	/* Get core clock for data register access via DMA */
1592 	spdif_priv->coreclk = devm_clk_get(&pdev->dev, "core");
1593 	if (IS_ERR(spdif_priv->coreclk)) {
1594 		dev_err(&pdev->dev, "no core clock in devicetree\n");
1595 		return PTR_ERR(spdif_priv->coreclk);
1596 	}
1597 
1598 	spdif_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
1599 	if (IS_ERR(spdif_priv->spbaclk))
1600 		dev_warn(&pdev->dev, "no spba clock in devicetree\n");
1601 
1602 	/* Select clock source for rx/tx clock */
1603 	spdif_priv->rxclk = spdif_priv->txclk[1];
1604 	if (IS_ERR(spdif_priv->rxclk)) {
1605 		dev_err(&pdev->dev, "no rxtx1 clock in devicetree\n");
1606 		return PTR_ERR(spdif_priv->rxclk);
1607 	}
1608 	spdif_priv->rxclk_src = DEFAULT_RXCLK_SRC;
1609 
1610 	fsl_asoc_get_pll_clocks(&pdev->dev, &spdif_priv->pll8k_clk,
1611 				&spdif_priv->pll11k_clk);
1612 
1613 	/* Initial spinlock for control data */
1614 	ctrl = &spdif_priv->fsl_spdif_control;
1615 	spin_lock_init(&ctrl->ctl_lock);
1616 
1617 	/* Init tx channel status default value */
1618 	ctrl->ch_status[0] = IEC958_AES0_CON_NOT_COPYRIGHT |
1619 			     IEC958_AES0_CON_EMPHASIS_5015;
1620 	ctrl->ch_status[1] = IEC958_AES1_CON_DIGDIGCONV_ID;
1621 	ctrl->ch_status[2] = 0x00;
1622 	ctrl->ch_status[3] = IEC958_AES3_CON_FS_44100 |
1623 			     IEC958_AES3_CON_CLOCK_1000PPM;
1624 
1625 	spdif_priv->dpll_locked = false;
1626 
1627 	spdif_priv->dma_params_tx.maxburst = spdif_priv->soc->tx_burst;
1628 	spdif_priv->dma_params_rx.maxburst = spdif_priv->soc->rx_burst;
1629 	spdif_priv->dma_params_tx.addr = res->start + REG_SPDIF_STL;
1630 	spdif_priv->dma_params_rx.addr = res->start + REG_SPDIF_SRL;
1631 
1632 	/* Register with ASoC */
1633 	dev_set_drvdata(&pdev->dev, spdif_priv);
1634 	pm_runtime_enable(&pdev->dev);
1635 	regcache_cache_only(spdif_priv->regmap, true);
1636 
1637 	/*
1638 	 * Register platform component before registering cpu dai for there
1639 	 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
1640 	 */
1641 	ret = imx_pcm_dma_init(pdev);
1642 	if (ret) {
1643 		dev_err_probe(&pdev->dev, ret, "imx_pcm_dma_init failed\n");
1644 		goto err_pm_disable;
1645 	}
1646 
1647 	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_spdif_component,
1648 					      &spdif_priv->cpu_dai_drv, 1);
1649 	if (ret) {
1650 		dev_err(&pdev->dev, "failed to register DAI: %d\n", ret);
1651 		goto err_pm_disable;
1652 	}
1653 
1654 	return ret;
1655 
1656 err_pm_disable:
1657 	pm_runtime_disable(&pdev->dev);
1658 	return ret;
1659 }
1660 
1661 static void fsl_spdif_remove(struct platform_device *pdev)
1662 {
1663 	pm_runtime_disable(&pdev->dev);
1664 }
1665 
1666 static int fsl_spdif_runtime_suspend(struct device *dev)
1667 {
1668 	struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
1669 	int i;
1670 
1671 	/* Disable all the interrupts */
1672 	regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SIE, 0xffffff, 0);
1673 
1674 	regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
1675 			&spdif_priv->regcache_srpc);
1676 	regcache_cache_only(spdif_priv->regmap, true);
1677 
1678 	for (i = 0; i < STC_TXCLK_SRC_MAX; i++)
1679 		clk_disable_unprepare(spdif_priv->txclk[i]);
1680 
1681 	if (!IS_ERR(spdif_priv->spbaclk))
1682 		clk_disable_unprepare(spdif_priv->spbaclk);
1683 	clk_disable_unprepare(spdif_priv->coreclk);
1684 
1685 	return 0;
1686 }
1687 
1688 static int fsl_spdif_runtime_resume(struct device *dev)
1689 {
1690 	struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
1691 	int ret;
1692 	int i;
1693 
1694 	ret = clk_prepare_enable(spdif_priv->coreclk);
1695 	if (ret) {
1696 		dev_err(dev, "failed to enable core clock\n");
1697 		return ret;
1698 	}
1699 
1700 	if (!IS_ERR(spdif_priv->spbaclk)) {
1701 		ret = clk_prepare_enable(spdif_priv->spbaclk);
1702 		if (ret) {
1703 			dev_err(dev, "failed to enable spba clock\n");
1704 			goto disable_core_clk;
1705 		}
1706 	}
1707 
1708 	for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
1709 		ret = clk_prepare_enable(spdif_priv->txclk[i]);
1710 		if (ret)
1711 			goto disable_tx_clk;
1712 	}
1713 
1714 	regcache_cache_only(spdif_priv->regmap, false);
1715 	regcache_mark_dirty(spdif_priv->regmap);
1716 
1717 	regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC,
1718 			SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
1719 			spdif_priv->regcache_srpc);
1720 
1721 	ret = regcache_sync(spdif_priv->regmap);
1722 	if (ret)
1723 		goto disable_tx_clk;
1724 
1725 	return 0;
1726 
1727 disable_tx_clk:
1728 	for (i--; i >= 0; i--)
1729 		clk_disable_unprepare(spdif_priv->txclk[i]);
1730 	if (!IS_ERR(spdif_priv->spbaclk))
1731 		clk_disable_unprepare(spdif_priv->spbaclk);
1732 disable_core_clk:
1733 	clk_disable_unprepare(spdif_priv->coreclk);
1734 
1735 	return ret;
1736 }
1737 
1738 static const struct dev_pm_ops fsl_spdif_pm = {
1739 	SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
1740 	RUNTIME_PM_OPS(fsl_spdif_runtime_suspend, fsl_spdif_runtime_resume,
1741 		       NULL)
1742 };
1743 
1744 static const struct of_device_id fsl_spdif_dt_ids[] = {
1745 	{ .compatible = "fsl,imx35-spdif", .data = &fsl_spdif_imx35, },
1746 	{ .compatible = "fsl,vf610-spdif", .data = &fsl_spdif_vf610, },
1747 	{ .compatible = "fsl,imx6sx-spdif", .data = &fsl_spdif_imx6sx, },
1748 	{ .compatible = "fsl,imx8qm-spdif", .data = &fsl_spdif_imx8qm, },
1749 	{ .compatible = "fsl,imx8mm-spdif", .data = &fsl_spdif_imx8mm, },
1750 	{ .compatible = "fsl,imx8ulp-spdif", .data = &fsl_spdif_imx8ulp, },
1751 	{}
1752 };
1753 MODULE_DEVICE_TABLE(of, fsl_spdif_dt_ids);
1754 
1755 static struct platform_driver fsl_spdif_driver = {
1756 	.driver = {
1757 		.name = "fsl-spdif-dai",
1758 		.of_match_table = fsl_spdif_dt_ids,
1759 		.pm = pm_ptr(&fsl_spdif_pm),
1760 	},
1761 	.probe = fsl_spdif_probe,
1762 	.remove = fsl_spdif_remove,
1763 };
1764 
1765 module_platform_driver(fsl_spdif_driver);
1766 
1767 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1768 MODULE_DESCRIPTION("Freescale S/PDIF CPU DAI Driver");
1769 MODULE_LICENSE("GPL v2");
1770 MODULE_ALIAS("platform:fsl-spdif-dai");
1771