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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * jh7110_tdm.c -- StarFive JH7110 TDM driver
4 *
5 * Copyright (C) 2023 StarFive Technology Co., Ltd.
6 *
7 * Author: Walker Chen <walker.chen@starfivetech.com>
8 */
9
10#include <linux/clk.h>
11#include <linux/device.h>
12#include <linux/dmaengine.h>
13#include <linux/module.h>
14#include <linux/of_irq.h>
15#include <linux/of_platform.h>
16#include <linux/pm_runtime.h>
17#include <linux/regmap.h>
18#include <linux/reset.h>
19#include <linux/types.h>
20#include <sound/dmaengine_pcm.h>
21#include <sound/initval.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/soc-dai.h>
26
27#define TDM_PCMGBCR 0x00
28 #define PCMGBCR_ENABLE BIT(0)
29 #define CLKPOL_BIT 5
30 #define ELM_BIT 3
31 #define SYNCM_BIT 2
32 #define MS_BIT 1
33#define TDM_PCMTXCR 0x04
34 #define PCMTXCR_TXEN BIT(0)
35 #define IFL_BIT 11
36 #define WL_BIT 8
37 #define SSCALE_BIT 4
38 #define SL_BIT 2
39 #define LRJ_BIT 1
40#define TDM_PCMRXCR 0x08
41 #define PCMRXCR_RXEN BIT(0)
42#define TDM_PCMDIV 0x0c
43
44#define JH7110_TDM_FIFO 0x170c0000
45#define JH7110_TDM_FIFO_DEPTH 32
46
47enum TDM_MASTER_SLAVE_MODE {
48 TDM_AS_MASTER = 0,
49 TDM_AS_SLAVE,
50};
51
52enum TDM_CLKPOL {
53 /* tx raising and rx falling */
54 TDM_TX_RASING_RX_FALLING = 0,
55 /* tx falling and rx raising */
56 TDM_TX_FALLING_RX_RASING,
57};
58
59enum TDM_ELM {
60 /* only work while SYNCM=0 */
61 TDM_ELM_LATE = 0,
62 TDM_ELM_EARLY,
63};
64
65enum TDM_SYNCM {
66 /* short frame sync */
67 TDM_SYNCM_SHORT = 0,
68 /* long frame sync */
69 TDM_SYNCM_LONG,
70};
71
72enum TDM_IFL {
73 /* FIFO to send or received : half-1/2, Quarter-1/4 */
74 TDM_FIFO_HALF = 0,
75 TDM_FIFO_QUARTER,
76};
77
78enum TDM_WL {
79 /* send or received word length */
80 TDM_8BIT_WORD_LEN = 0,
81 TDM_16BIT_WORD_LEN,
82 TDM_20BIT_WORD_LEN,
83 TDM_24BIT_WORD_LEN,
84 TDM_32BIT_WORD_LEN,
85};
86
87enum TDM_SL {
88 /* send or received slot length */
89 TDM_8BIT_SLOT_LEN = 0,
90 TDM_16BIT_SLOT_LEN,
91 TDM_32BIT_SLOT_LEN,
92};
93
94enum TDM_LRJ {
95 /* left-justify or right-justify */
96 TDM_RIGHT_JUSTIFY = 0,
97 TDM_LEFT_JUSTIFT,
98};
99
100struct tdm_chan_cfg {
101 enum TDM_IFL ifl;
102 enum TDM_WL wl;
103 unsigned char sscale;
104 enum TDM_SL sl;
105 enum TDM_LRJ lrj;
106 unsigned char enable;
107};
108
109struct jh7110_tdm_dev {
110 void __iomem *tdm_base;
111 struct device *dev;
112 struct clk_bulk_data clks[6];
113 struct reset_control *resets;
114
115 enum TDM_CLKPOL clkpolity;
116 enum TDM_ELM elm;
117 enum TDM_SYNCM syncm;
118 enum TDM_MASTER_SLAVE_MODE ms_mode;
119
120 struct tdm_chan_cfg tx;
121 struct tdm_chan_cfg rx;
122
123 u16 syncdiv;
124 u32 samplerate;
125 u32 pcmclk;
126
127 /* data related to DMA transfers b/w tdm and DMAC */
128 struct snd_dmaengine_dai_dma_data play_dma_data;
129 struct snd_dmaengine_dai_dma_data capture_dma_data;
130 u32 saved_pcmgbcr;
131 u32 saved_pcmtxcr;
132 u32 saved_pcmrxcr;
133 u32 saved_pcmdiv;
134};
135
136static inline u32 jh7110_tdm_readl(struct jh7110_tdm_dev *tdm, u16 reg)
137{
138 return readl_relaxed(tdm->tdm_base + reg);
139}
140
141static inline void jh7110_tdm_writel(struct jh7110_tdm_dev *tdm, u16 reg, u32 val)
142{
143 writel_relaxed(val, tdm->tdm_base + reg);
144}
145
146static void jh7110_tdm_save_context(struct jh7110_tdm_dev *tdm,
147 struct snd_pcm_substream *substream)
148{
149 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
150 tdm->saved_pcmtxcr = jh7110_tdm_readl(tdm, TDM_PCMTXCR);
151 else
152 tdm->saved_pcmrxcr = jh7110_tdm_readl(tdm, TDM_PCMRXCR);
153}
154
155static void jh7110_tdm_start(struct jh7110_tdm_dev *tdm,
156 struct snd_pcm_substream *substream)
157{
158 u32 data;
159
160 data = jh7110_tdm_readl(tdm, TDM_PCMGBCR);
161 jh7110_tdm_writel(tdm, TDM_PCMGBCR, data | PCMGBCR_ENABLE);
162
163 /* restore context */
164 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
165 jh7110_tdm_writel(tdm, TDM_PCMTXCR, tdm->saved_pcmtxcr | PCMTXCR_TXEN);
166 else
167 jh7110_tdm_writel(tdm, TDM_PCMRXCR, tdm->saved_pcmrxcr | PCMRXCR_RXEN);
168}
169
170static void jh7110_tdm_stop(struct jh7110_tdm_dev *tdm,
171 struct snd_pcm_substream *substream)
172{
173 unsigned int val;
174
175 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
176 val = jh7110_tdm_readl(tdm, TDM_PCMTXCR);
177 val &= ~PCMTXCR_TXEN;
178 jh7110_tdm_writel(tdm, TDM_PCMTXCR, val);
179 } else {
180 val = jh7110_tdm_readl(tdm, TDM_PCMRXCR);
181 val &= ~PCMRXCR_RXEN;
182 jh7110_tdm_writel(tdm, TDM_PCMRXCR, val);
183 }
184}
185
186static int jh7110_tdm_syncdiv(struct jh7110_tdm_dev *tdm)
187{
188 u32 sl, sscale, syncdiv;
189
190 if (tdm->rx.sl >= tdm->tx.sl)
191 sl = tdm->rx.sl;
192 else
193 sl = tdm->tx.sl;
194
195 if (tdm->rx.sscale >= tdm->tx.sscale)
196 sscale = tdm->rx.sscale;
197 else
198 sscale = tdm->tx.sscale;
199
200 syncdiv = tdm->pcmclk / tdm->samplerate - 1;
201
202 if ((syncdiv + 1) < (sl * sscale)) {
203 dev_err(tdm->dev, "Failed to set syncdiv!\n");
204 return -EINVAL;
205 }
206
207 if (tdm->syncm == TDM_SYNCM_LONG &&
208 (tdm->rx.sscale <= 1 || tdm->tx.sscale <= 1) &&
209 ((syncdiv + 1) <= sl)) {
210 dev_err(tdm->dev, "Wrong syncdiv! It must be (syncdiv+1) > max[tx.sl, rx.sl]\n");
211 return -EINVAL;
212 }
213
214 jh7110_tdm_writel(tdm, TDM_PCMDIV, syncdiv);
215 return 0;
216}
217
218static int jh7110_tdm_config(struct jh7110_tdm_dev *tdm,
219 struct snd_pcm_substream *substream)
220{
221 u32 datarx, datatx;
222 int ret;
223
224 ret = jh7110_tdm_syncdiv(tdm);
225 if (ret)
226 return ret;
227
228 datarx = (tdm->rx.ifl << IFL_BIT) |
229 (tdm->rx.wl << WL_BIT) |
230 (tdm->rx.sscale << SSCALE_BIT) |
231 (tdm->rx.sl << SL_BIT) |
232 (tdm->rx.lrj << LRJ_BIT);
233
234 datatx = (tdm->tx.ifl << IFL_BIT) |
235 (tdm->tx.wl << WL_BIT) |
236 (tdm->tx.sscale << SSCALE_BIT) |
237 (tdm->tx.sl << SL_BIT) |
238 (tdm->tx.lrj << LRJ_BIT);
239
240 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
241 jh7110_tdm_writel(tdm, TDM_PCMTXCR, datatx);
242 else
243 jh7110_tdm_writel(tdm, TDM_PCMRXCR, datarx);
244
245 return 0;
246}
247
248static void jh7110_tdm_clk_disable(struct jh7110_tdm_dev *tdm)
249{
250 clk_bulk_disable_unprepare(ARRAY_SIZE(tdm->clks), tdm->clks);
251}
252
253static int jh7110_tdm_clk_enable(struct jh7110_tdm_dev *tdm)
254{
255 int ret;
256
257 ret = clk_bulk_prepare_enable(ARRAY_SIZE(tdm->clks), tdm->clks);
258 if (ret) {
259 dev_err(tdm->dev, "Failed to enable tdm clocks\n");
260 return ret;
261 }
262
263 ret = reset_control_deassert(tdm->resets);
264 if (ret) {
265 dev_err(tdm->dev, "Failed to deassert tdm resets\n");
266 goto dis_tdm_clk;
267 }
268
269 /* select tdm_ext clock as the clock source for tdm */
270 ret = clk_set_parent(tdm->clks[5].clk, tdm->clks[4].clk);
271 if (ret) {
272 dev_err(tdm->dev, "Can't set extern clock source for clk_tdm\n");
273 goto dis_tdm_clk;
274 }
275
276 return 0;
277
278dis_tdm_clk:
279 clk_bulk_disable_unprepare(ARRAY_SIZE(tdm->clks), tdm->clks);
280
281 return ret;
282}
283
284static int jh7110_tdm_runtime_suspend(struct device *dev)
285{
286 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
287
288 jh7110_tdm_clk_disable(tdm);
289 return 0;
290}
291
292static int jh7110_tdm_runtime_resume(struct device *dev)
293{
294 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
295
296 return jh7110_tdm_clk_enable(tdm);
297}
298
299static int jh7110_tdm_system_suspend(struct device *dev)
300{
301 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
302
303 /* save context */
304 tdm->saved_pcmgbcr = jh7110_tdm_readl(tdm, TDM_PCMGBCR);
305 tdm->saved_pcmdiv = jh7110_tdm_readl(tdm, TDM_PCMDIV);
306
307 return pm_runtime_force_suspend(dev);
308}
309
310static int jh7110_tdm_system_resume(struct device *dev)
311{
312 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
313
314 /* restore context */
315 jh7110_tdm_writel(tdm, TDM_PCMGBCR, tdm->saved_pcmgbcr);
316 jh7110_tdm_writel(tdm, TDM_PCMDIV, tdm->saved_pcmdiv);
317
318 return pm_runtime_force_resume(dev);
319}
320
321static const struct snd_soc_component_driver jh7110_tdm_component = {
322 .name = "jh7110-tdm",
323};
324
325static int jh7110_tdm_startup(struct snd_pcm_substream *substream,
326 struct snd_soc_dai *cpu_dai)
327{
328 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
329 struct snd_soc_dai_link *dai_link = rtd->dai_link;
330
331 dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC;
332
333 return 0;
334}
335
336static int jh7110_tdm_hw_params(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params *params,
338 struct snd_soc_dai *dai)
339{
340 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
341 int chan_wl, chan_sl, chan_nr;
342 unsigned int data_width;
343 unsigned int dma_bus_width;
344 struct snd_dmaengine_dai_dma_data *dma_data = NULL;
345 int ret;
346
347 data_width = params_width(params);
348
349 tdm->samplerate = params_rate(params);
350 tdm->pcmclk = params_channels(params) * tdm->samplerate * data_width;
351
352 switch (params_format(params)) {
353 case SNDRV_PCM_FORMAT_S16_LE:
354 chan_wl = TDM_16BIT_WORD_LEN;
355 chan_sl = TDM_16BIT_SLOT_LEN;
356 dma_bus_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
357 break;
358
359 case SNDRV_PCM_FORMAT_S32_LE:
360 chan_wl = TDM_32BIT_WORD_LEN;
361 chan_sl = TDM_32BIT_SLOT_LEN;
362 dma_bus_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
363 break;
364
365 default:
366 dev_err(tdm->dev, "tdm: unsupported PCM fmt");
367 return -EINVAL;
368 }
369
370 chan_nr = params_channels(params);
371 switch (chan_nr) {
372 case 1:
373 case 2:
374 case 4:
375 case 6:
376 case 8:
377 break;
378 default:
379 dev_err(tdm->dev, "channel not supported\n");
380 return -EINVAL;
381 }
382
383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
384 tdm->tx.wl = chan_wl;
385 tdm->tx.sl = chan_sl;
386 tdm->tx.sscale = chan_nr;
387 tdm->play_dma_data.addr_width = dma_bus_width;
388 dma_data = &tdm->play_dma_data;
389 } else {
390 tdm->rx.wl = chan_wl;
391 tdm->rx.sl = chan_sl;
392 tdm->rx.sscale = chan_nr;
393 tdm->capture_dma_data.addr_width = dma_bus_width;
394 dma_data = &tdm->capture_dma_data;
395 }
396
397 snd_soc_dai_set_dma_data(dai, substream, dma_data);
398
399 ret = jh7110_tdm_config(tdm, substream);
400 if (ret)
401 return ret;
402
403 jh7110_tdm_save_context(tdm, substream);
404 return 0;
405}
406
407static int jh7110_tdm_trigger(struct snd_pcm_substream *substream,
408 int cmd, struct snd_soc_dai *dai)
409{
410 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
411 int ret = 0;
412
413 switch (cmd) {
414 case SNDRV_PCM_TRIGGER_START:
415 case SNDRV_PCM_TRIGGER_RESUME:
416 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
417 jh7110_tdm_start(tdm, substream);
418 break;
419
420 case SNDRV_PCM_TRIGGER_STOP:
421 case SNDRV_PCM_TRIGGER_SUSPEND:
422 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
423 jh7110_tdm_stop(tdm, substream);
424 break;
425 default:
426 ret = -EINVAL;
427 break;
428 }
429
430 return ret;
431}
432
433static int jh7110_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
434 unsigned int fmt)
435{
436 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(cpu_dai);
437 unsigned int gbcr;
438
439 /* set master/slave audio interface */
440 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
441 case SND_SOC_DAIFMT_BP_FP:
442 /* cpu is master */
443 tdm->ms_mode = TDM_AS_MASTER;
444 break;
445 case SND_SOC_DAIFMT_BC_FC:
446 /* codec is master */
447 tdm->ms_mode = TDM_AS_SLAVE;
448 break;
449 case SND_SOC_DAIFMT_BC_FP:
450 case SND_SOC_DAIFMT_BP_FC:
451 return -EINVAL;
452 default:
453 dev_dbg(tdm->dev, "dwc : Invalid clock provider format\n");
454 return -EINVAL;
455 }
456
457 gbcr = (tdm->clkpolity << CLKPOL_BIT) |
458 (tdm->elm << ELM_BIT) |
459 (tdm->syncm << SYNCM_BIT) |
460 (tdm->ms_mode << MS_BIT);
461 jh7110_tdm_writel(tdm, TDM_PCMGBCR, gbcr);
462
463 return 0;
464}
465
466static int jh7110_tdm_dai_probe(struct snd_soc_dai *dai)
467{
468 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
469
470 snd_soc_dai_init_dma_data(dai, &tdm->play_dma_data, &tdm->capture_dma_data);
471 snd_soc_dai_set_drvdata(dai, tdm);
472 return 0;
473}
474
475static const struct snd_soc_dai_ops jh7110_tdm_dai_ops = {
476 .probe = jh7110_tdm_dai_probe,
477 .startup = jh7110_tdm_startup,
478 .hw_params = jh7110_tdm_hw_params,
479 .trigger = jh7110_tdm_trigger,
480 .set_fmt = jh7110_tdm_set_dai_fmt,
481};
482
483#define JH7110_TDM_RATES SNDRV_PCM_RATE_8000_48000
484
485#define JH7110_TDM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
486 SNDRV_PCM_FMTBIT_S32_LE)
487
488static struct snd_soc_dai_driver jh7110_tdm_dai = {
489 .name = "sf_tdm",
490 .id = 0,
491 .playback = {
492 .stream_name = "Playback",
493 .channels_min = 1,
494 .channels_max = 8,
495 .rates = JH7110_TDM_RATES,
496 .formats = JH7110_TDM_FORMATS,
497 },
498 .capture = {
499 .stream_name = "Capture",
500 .channels_min = 1,
501 .channels_max = 8,
502 .rates = JH7110_TDM_RATES,
503 .formats = JH7110_TDM_FORMATS,
504 },
505 .ops = &jh7110_tdm_dai_ops,
506 .symmetric_rate = 1,
507};
508
509static const struct snd_pcm_hardware jh7110_pcm_hardware = {
510 .info = (SNDRV_PCM_INFO_MMAP |
511 SNDRV_PCM_INFO_MMAP_VALID |
512 SNDRV_PCM_INFO_PAUSE |
513 SNDRV_PCM_INFO_RESUME |
514 SNDRV_PCM_INFO_INTERLEAVED |
515 SNDRV_PCM_INFO_BLOCK_TRANSFER),
516 .buffer_bytes_max = 192512,
517 .period_bytes_min = 4096,
518 .period_bytes_max = 32768,
519 .periods_min = 1,
520 .periods_max = 48,
521 .fifo_size = 16,
522};
523
524static const struct snd_dmaengine_pcm_config jh7110_dmaengine_pcm_config = {
525 .pcm_hardware = &jh7110_pcm_hardware,
526 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
527 .prealloc_buffer_size = 192512,
528};
529
530static void jh7110_tdm_init_params(struct jh7110_tdm_dev *tdm)
531{
532 tdm->clkpolity = TDM_TX_RASING_RX_FALLING;
533 tdm->elm = TDM_ELM_LATE;
534 tdm->syncm = TDM_SYNCM_SHORT;
535
536 tdm->rx.ifl = TDM_FIFO_HALF;
537 tdm->tx.ifl = TDM_FIFO_HALF;
538 tdm->rx.wl = TDM_16BIT_WORD_LEN;
539 tdm->tx.wl = TDM_16BIT_WORD_LEN;
540 tdm->rx.sscale = 2;
541 tdm->tx.sscale = 2;
542 tdm->rx.lrj = TDM_LEFT_JUSTIFT;
543 tdm->tx.lrj = TDM_LEFT_JUSTIFT;
544
545 tdm->play_dma_data.addr = JH7110_TDM_FIFO;
546 tdm->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
547 tdm->play_dma_data.fifo_size = JH7110_TDM_FIFO_DEPTH / 2;
548 tdm->play_dma_data.maxburst = 16;
549
550 tdm->capture_dma_data.addr = JH7110_TDM_FIFO;
551 tdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
552 tdm->capture_dma_data.fifo_size = JH7110_TDM_FIFO_DEPTH / 2;
553 tdm->capture_dma_data.maxburst = 8;
554}
555
556static int jh7110_tdm_clk_reset_get(struct platform_device *pdev,
557 struct jh7110_tdm_dev *tdm)
558{
559 int ret;
560
561 tdm->clks[0].id = "mclk_inner";
562 tdm->clks[1].id = "tdm_ahb";
563 tdm->clks[2].id = "tdm_apb";
564 tdm->clks[3].id = "tdm_internal";
565 tdm->clks[4].id = "tdm_ext";
566 tdm->clks[5].id = "tdm";
567
568 ret = devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(tdm->clks), tdm->clks);
569 if (ret) {
570 dev_err(&pdev->dev, "Failed to get tdm clocks\n");
571 return ret;
572 }
573
574 tdm->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
575 if (IS_ERR(tdm->resets)) {
576 dev_err(&pdev->dev, "Failed to get tdm resets\n");
577 return PTR_ERR(tdm->resets);
578 }
579
580 return 0;
581}
582
583static int jh7110_tdm_probe(struct platform_device *pdev)
584{
585 struct jh7110_tdm_dev *tdm;
586 int ret;
587
588 tdm = devm_kzalloc(&pdev->dev, sizeof(*tdm), GFP_KERNEL);
589 if (!tdm)
590 return -ENOMEM;
591
592 tdm->tdm_base = devm_platform_ioremap_resource(pdev, 0);
593 if (IS_ERR(tdm->tdm_base))
594 return PTR_ERR(tdm->tdm_base);
595
596 tdm->dev = &pdev->dev;
597
598 ret = jh7110_tdm_clk_reset_get(pdev, tdm);
599 if (ret) {
600 dev_err(&pdev->dev, "Failed to enable audio-tdm clock\n");
601 return ret;
602 }
603
604 jh7110_tdm_init_params(tdm);
605
606 dev_set_drvdata(&pdev->dev, tdm);
607 ret = devm_snd_soc_register_component(&pdev->dev, &jh7110_tdm_component,
608 &jh7110_tdm_dai, 1);
609 if (ret) {
610 dev_err(&pdev->dev, "Failed to register dai\n");
611 return ret;
612 }
613
614 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
615 &jh7110_dmaengine_pcm_config,
616 SND_DMAENGINE_PCM_FLAG_COMPAT);
617 if (ret) {
618 dev_err(&pdev->dev, "Could not register pcm: %d\n", ret);
619 return ret;
620 }
621
622 pm_runtime_enable(&pdev->dev);
623 if (!pm_runtime_enabled(&pdev->dev)) {
624 ret = jh7110_tdm_runtime_resume(&pdev->dev);
625 if (ret)
626 goto err_pm_disable;
627 }
628
629 return 0;
630
631err_pm_disable:
632 pm_runtime_disable(&pdev->dev);
633
634 return ret;
635}
636
637static void jh7110_tdm_dev_remove(struct platform_device *pdev)
638{
639 pm_runtime_disable(&pdev->dev);
640}
641
642static const struct of_device_id jh7110_tdm_of_match[] = {
643 { .compatible = "starfive,jh7110-tdm", },
644 {}
645};
646
647MODULE_DEVICE_TABLE(of, jh7110_tdm_of_match);
648
649static const struct dev_pm_ops jh7110_tdm_pm_ops = {
650 RUNTIME_PM_OPS(jh7110_tdm_runtime_suspend,
651 jh7110_tdm_runtime_resume, NULL)
652 SYSTEM_SLEEP_PM_OPS(jh7110_tdm_system_suspend,
653 jh7110_tdm_system_resume)
654};
655
656static struct platform_driver jh7110_tdm_driver = {
657 .driver = {
658 .name = "jh7110-tdm",
659 .of_match_table = jh7110_tdm_of_match,
660 .pm = pm_ptr(&jh7110_tdm_pm_ops),
661 },
662 .probe = jh7110_tdm_probe,
663 .remove = jh7110_tdm_dev_remove,
664};
665module_platform_driver(jh7110_tdm_driver);
666
667MODULE_DESCRIPTION("StarFive JH7110 TDM ASoC Driver");
668MODULE_AUTHOR("Walker Chen <walker.chen@starfivetech.com>");
669MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * jh7110_tdm.c -- StarFive JH7110 TDM driver
4 *
5 * Copyright (C) 2023 StarFive Technology Co., Ltd.
6 *
7 * Author: Walker Chen <walker.chen@starfivetech.com>
8 */
9
10#include <linux/clk.h>
11#include <linux/device.h>
12#include <linux/dmaengine.h>
13#include <linux/module.h>
14#include <linux/of_irq.h>
15#include <linux/of_platform.h>
16#include <linux/pm_runtime.h>
17#include <linux/regmap.h>
18#include <linux/reset.h>
19#include <linux/types.h>
20#include <sound/dmaengine_pcm.h>
21#include <sound/initval.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/soc-dai.h>
26
27#define TDM_PCMGBCR 0x00
28 #define PCMGBCR_ENABLE BIT(0)
29 #define CLKPOL_BIT 5
30 #define ELM_BIT 3
31 #define SYNCM_BIT 2
32 #define MS_BIT 1
33#define TDM_PCMTXCR 0x04
34 #define PCMTXCR_TXEN BIT(0)
35 #define IFL_BIT 11
36 #define WL_BIT 8
37 #define SSCALE_BIT 4
38 #define SL_BIT 2
39 #define LRJ_BIT 1
40#define TDM_PCMRXCR 0x08
41 #define PCMRXCR_RXEN BIT(0)
42#define TDM_PCMDIV 0x0c
43
44#define JH7110_TDM_FIFO 0x170c0000
45#define JH7110_TDM_FIFO_DEPTH 32
46
47enum TDM_MASTER_SLAVE_MODE {
48 TDM_AS_MASTER = 0,
49 TDM_AS_SLAVE,
50};
51
52enum TDM_CLKPOL {
53 /* tx raising and rx falling */
54 TDM_TX_RASING_RX_FALLING = 0,
55 /* tx falling and rx raising */
56 TDM_TX_FALLING_RX_RASING,
57};
58
59enum TDM_ELM {
60 /* only work while SYNCM=0 */
61 TDM_ELM_LATE = 0,
62 TDM_ELM_EARLY,
63};
64
65enum TDM_SYNCM {
66 /* short frame sync */
67 TDM_SYNCM_SHORT = 0,
68 /* long frame sync */
69 TDM_SYNCM_LONG,
70};
71
72enum TDM_IFL {
73 /* FIFO to send or received : half-1/2, Quarter-1/4 */
74 TDM_FIFO_HALF = 0,
75 TDM_FIFO_QUARTER,
76};
77
78enum TDM_WL {
79 /* send or received word length */
80 TDM_8BIT_WORD_LEN = 0,
81 TDM_16BIT_WORD_LEN,
82 TDM_20BIT_WORD_LEN,
83 TDM_24BIT_WORD_LEN,
84 TDM_32BIT_WORD_LEN,
85};
86
87enum TDM_SL {
88 /* send or received slot length */
89 TDM_8BIT_SLOT_LEN = 0,
90 TDM_16BIT_SLOT_LEN,
91 TDM_32BIT_SLOT_LEN,
92};
93
94enum TDM_LRJ {
95 /* left-justify or right-justify */
96 TDM_RIGHT_JUSTIFY = 0,
97 TDM_LEFT_JUSTIFT,
98};
99
100struct tdm_chan_cfg {
101 enum TDM_IFL ifl;
102 enum TDM_WL wl;
103 unsigned char sscale;
104 enum TDM_SL sl;
105 enum TDM_LRJ lrj;
106 unsigned char enable;
107};
108
109struct jh7110_tdm_dev {
110 void __iomem *tdm_base;
111 struct device *dev;
112 struct clk_bulk_data clks[6];
113 struct reset_control *resets;
114
115 enum TDM_CLKPOL clkpolity;
116 enum TDM_ELM elm;
117 enum TDM_SYNCM syncm;
118 enum TDM_MASTER_SLAVE_MODE ms_mode;
119
120 struct tdm_chan_cfg tx;
121 struct tdm_chan_cfg rx;
122
123 u16 syncdiv;
124 u32 samplerate;
125 u32 pcmclk;
126
127 /* data related to DMA transfers b/w tdm and DMAC */
128 struct snd_dmaengine_dai_dma_data play_dma_data;
129 struct snd_dmaengine_dai_dma_data capture_dma_data;
130 u32 saved_pcmgbcr;
131 u32 saved_pcmtxcr;
132 u32 saved_pcmrxcr;
133 u32 saved_pcmdiv;
134};
135
136static inline u32 jh7110_tdm_readl(struct jh7110_tdm_dev *tdm, u16 reg)
137{
138 return readl_relaxed(tdm->tdm_base + reg);
139}
140
141static inline void jh7110_tdm_writel(struct jh7110_tdm_dev *tdm, u16 reg, u32 val)
142{
143 writel_relaxed(val, tdm->tdm_base + reg);
144}
145
146static void jh7110_tdm_save_context(struct jh7110_tdm_dev *tdm,
147 struct snd_pcm_substream *substream)
148{
149 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
150 tdm->saved_pcmtxcr = jh7110_tdm_readl(tdm, TDM_PCMTXCR);
151 else
152 tdm->saved_pcmrxcr = jh7110_tdm_readl(tdm, TDM_PCMRXCR);
153}
154
155static void jh7110_tdm_start(struct jh7110_tdm_dev *tdm,
156 struct snd_pcm_substream *substream)
157{
158 u32 data;
159
160 data = jh7110_tdm_readl(tdm, TDM_PCMGBCR);
161 jh7110_tdm_writel(tdm, TDM_PCMGBCR, data | PCMGBCR_ENABLE);
162
163 /* restore context */
164 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
165 jh7110_tdm_writel(tdm, TDM_PCMTXCR, tdm->saved_pcmtxcr | PCMTXCR_TXEN);
166 else
167 jh7110_tdm_writel(tdm, TDM_PCMRXCR, tdm->saved_pcmrxcr | PCMRXCR_RXEN);
168}
169
170static void jh7110_tdm_stop(struct jh7110_tdm_dev *tdm,
171 struct snd_pcm_substream *substream)
172{
173 unsigned int val;
174
175 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
176 val = jh7110_tdm_readl(tdm, TDM_PCMTXCR);
177 val &= ~PCMTXCR_TXEN;
178 jh7110_tdm_writel(tdm, TDM_PCMTXCR, val);
179 } else {
180 val = jh7110_tdm_readl(tdm, TDM_PCMRXCR);
181 val &= ~PCMRXCR_RXEN;
182 jh7110_tdm_writel(tdm, TDM_PCMRXCR, val);
183 }
184}
185
186static int jh7110_tdm_syncdiv(struct jh7110_tdm_dev *tdm)
187{
188 u32 sl, sscale, syncdiv;
189
190 if (tdm->rx.sl >= tdm->tx.sl)
191 sl = tdm->rx.sl;
192 else
193 sl = tdm->tx.sl;
194
195 if (tdm->rx.sscale >= tdm->tx.sscale)
196 sscale = tdm->rx.sscale;
197 else
198 sscale = tdm->tx.sscale;
199
200 syncdiv = tdm->pcmclk / tdm->samplerate - 1;
201
202 if ((syncdiv + 1) < (sl * sscale)) {
203 dev_err(tdm->dev, "Failed to set syncdiv!\n");
204 return -EINVAL;
205 }
206
207 if (tdm->syncm == TDM_SYNCM_LONG &&
208 (tdm->rx.sscale <= 1 || tdm->tx.sscale <= 1) &&
209 ((syncdiv + 1) <= sl)) {
210 dev_err(tdm->dev, "Wrong syncdiv! It must be (syncdiv+1) > max[tx.sl, rx.sl]\n");
211 return -EINVAL;
212 }
213
214 jh7110_tdm_writel(tdm, TDM_PCMDIV, syncdiv);
215 return 0;
216}
217
218static int jh7110_tdm_config(struct jh7110_tdm_dev *tdm,
219 struct snd_pcm_substream *substream)
220{
221 u32 datarx, datatx;
222 int ret;
223
224 ret = jh7110_tdm_syncdiv(tdm);
225 if (ret)
226 return ret;
227
228 datarx = (tdm->rx.ifl << IFL_BIT) |
229 (tdm->rx.wl << WL_BIT) |
230 (tdm->rx.sscale << SSCALE_BIT) |
231 (tdm->rx.sl << SL_BIT) |
232 (tdm->rx.lrj << LRJ_BIT);
233
234 datatx = (tdm->tx.ifl << IFL_BIT) |
235 (tdm->tx.wl << WL_BIT) |
236 (tdm->tx.sscale << SSCALE_BIT) |
237 (tdm->tx.sl << SL_BIT) |
238 (tdm->tx.lrj << LRJ_BIT);
239
240 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
241 jh7110_tdm_writel(tdm, TDM_PCMTXCR, datatx);
242 else
243 jh7110_tdm_writel(tdm, TDM_PCMRXCR, datarx);
244
245 return 0;
246}
247
248static void jh7110_tdm_clk_disable(struct jh7110_tdm_dev *tdm)
249{
250 clk_bulk_disable_unprepare(ARRAY_SIZE(tdm->clks), tdm->clks);
251}
252
253static int jh7110_tdm_clk_enable(struct jh7110_tdm_dev *tdm)
254{
255 int ret;
256
257 ret = clk_bulk_prepare_enable(ARRAY_SIZE(tdm->clks), tdm->clks);
258 if (ret) {
259 dev_err(tdm->dev, "Failed to enable tdm clocks\n");
260 return ret;
261 }
262
263 ret = reset_control_deassert(tdm->resets);
264 if (ret) {
265 dev_err(tdm->dev, "Failed to deassert tdm resets\n");
266 goto dis_tdm_clk;
267 }
268
269 /* select tdm_ext clock as the clock source for tdm */
270 ret = clk_set_parent(tdm->clks[5].clk, tdm->clks[4].clk);
271 if (ret) {
272 dev_err(tdm->dev, "Can't set extern clock source for clk_tdm\n");
273 goto dis_tdm_clk;
274 }
275
276 return 0;
277
278dis_tdm_clk:
279 clk_bulk_disable_unprepare(ARRAY_SIZE(tdm->clks), tdm->clks);
280
281 return ret;
282}
283
284static int jh7110_tdm_runtime_suspend(struct device *dev)
285{
286 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
287
288 jh7110_tdm_clk_disable(tdm);
289 return 0;
290}
291
292static int jh7110_tdm_runtime_resume(struct device *dev)
293{
294 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
295
296 return jh7110_tdm_clk_enable(tdm);
297}
298
299static int jh7110_tdm_system_suspend(struct device *dev)
300{
301 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
302
303 /* save context */
304 tdm->saved_pcmgbcr = jh7110_tdm_readl(tdm, TDM_PCMGBCR);
305 tdm->saved_pcmdiv = jh7110_tdm_readl(tdm, TDM_PCMDIV);
306
307 return pm_runtime_force_suspend(dev);
308}
309
310static int jh7110_tdm_system_resume(struct device *dev)
311{
312 struct jh7110_tdm_dev *tdm = dev_get_drvdata(dev);
313
314 /* restore context */
315 jh7110_tdm_writel(tdm, TDM_PCMGBCR, tdm->saved_pcmgbcr);
316 jh7110_tdm_writel(tdm, TDM_PCMDIV, tdm->saved_pcmdiv);
317
318 return pm_runtime_force_resume(dev);
319}
320
321static const struct snd_soc_component_driver jh7110_tdm_component = {
322 .name = "jh7110-tdm",
323};
324
325static int jh7110_tdm_startup(struct snd_pcm_substream *substream,
326 struct snd_soc_dai *cpu_dai)
327{
328 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
329 struct snd_soc_dai_link *dai_link = rtd->dai_link;
330
331 dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC;
332
333 return 0;
334}
335
336static int jh7110_tdm_hw_params(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params *params,
338 struct snd_soc_dai *dai)
339{
340 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
341 int chan_wl, chan_sl, chan_nr;
342 unsigned int data_width;
343 unsigned int dma_bus_width;
344 struct snd_dmaengine_dai_dma_data *dma_data = NULL;
345 int ret;
346
347 data_width = params_width(params);
348
349 tdm->samplerate = params_rate(params);
350 tdm->pcmclk = params_channels(params) * tdm->samplerate * data_width;
351
352 switch (params_format(params)) {
353 case SNDRV_PCM_FORMAT_S16_LE:
354 chan_wl = TDM_16BIT_WORD_LEN;
355 chan_sl = TDM_16BIT_SLOT_LEN;
356 dma_bus_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
357 break;
358
359 case SNDRV_PCM_FORMAT_S32_LE:
360 chan_wl = TDM_32BIT_WORD_LEN;
361 chan_sl = TDM_32BIT_SLOT_LEN;
362 dma_bus_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
363 break;
364
365 default:
366 dev_err(tdm->dev, "tdm: unsupported PCM fmt");
367 return -EINVAL;
368 }
369
370 chan_nr = params_channels(params);
371 switch (chan_nr) {
372 case 1:
373 case 2:
374 case 4:
375 case 6:
376 case 8:
377 break;
378 default:
379 dev_err(tdm->dev, "channel not supported\n");
380 return -EINVAL;
381 }
382
383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
384 tdm->tx.wl = chan_wl;
385 tdm->tx.sl = chan_sl;
386 tdm->tx.sscale = chan_nr;
387 tdm->play_dma_data.addr_width = dma_bus_width;
388 dma_data = &tdm->play_dma_data;
389 } else {
390 tdm->rx.wl = chan_wl;
391 tdm->rx.sl = chan_sl;
392 tdm->rx.sscale = chan_nr;
393 tdm->capture_dma_data.addr_width = dma_bus_width;
394 dma_data = &tdm->capture_dma_data;
395 }
396
397 snd_soc_dai_set_dma_data(dai, substream, dma_data);
398
399 ret = jh7110_tdm_config(tdm, substream);
400 if (ret)
401 return ret;
402
403 jh7110_tdm_save_context(tdm, substream);
404 return 0;
405}
406
407static int jh7110_tdm_trigger(struct snd_pcm_substream *substream,
408 int cmd, struct snd_soc_dai *dai)
409{
410 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
411 int ret = 0;
412
413 switch (cmd) {
414 case SNDRV_PCM_TRIGGER_START:
415 case SNDRV_PCM_TRIGGER_RESUME:
416 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
417 jh7110_tdm_start(tdm, substream);
418 break;
419
420 case SNDRV_PCM_TRIGGER_STOP:
421 case SNDRV_PCM_TRIGGER_SUSPEND:
422 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
423 jh7110_tdm_stop(tdm, substream);
424 break;
425 default:
426 ret = -EINVAL;
427 break;
428 }
429
430 return ret;
431}
432
433static int jh7110_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
434 unsigned int fmt)
435{
436 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(cpu_dai);
437 unsigned int gbcr;
438
439 /* set master/slave audio interface */
440 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
441 case SND_SOC_DAIFMT_BP_FP:
442 /* cpu is master */
443 tdm->ms_mode = TDM_AS_MASTER;
444 break;
445 case SND_SOC_DAIFMT_BC_FC:
446 /* codec is master */
447 tdm->ms_mode = TDM_AS_SLAVE;
448 break;
449 case SND_SOC_DAIFMT_BC_FP:
450 case SND_SOC_DAIFMT_BP_FC:
451 return -EINVAL;
452 default:
453 dev_dbg(tdm->dev, "dwc : Invalid clock provider format\n");
454 return -EINVAL;
455 }
456
457 gbcr = (tdm->clkpolity << CLKPOL_BIT) |
458 (tdm->elm << ELM_BIT) |
459 (tdm->syncm << SYNCM_BIT) |
460 (tdm->ms_mode << MS_BIT);
461 jh7110_tdm_writel(tdm, TDM_PCMGBCR, gbcr);
462
463 return 0;
464}
465
466static int jh7110_tdm_dai_probe(struct snd_soc_dai *dai)
467{
468 struct jh7110_tdm_dev *tdm = snd_soc_dai_get_drvdata(dai);
469
470 snd_soc_dai_init_dma_data(dai, &tdm->play_dma_data, &tdm->capture_dma_data);
471 snd_soc_dai_set_drvdata(dai, tdm);
472 return 0;
473}
474
475static const struct snd_soc_dai_ops jh7110_tdm_dai_ops = {
476 .probe = jh7110_tdm_dai_probe,
477 .startup = jh7110_tdm_startup,
478 .hw_params = jh7110_tdm_hw_params,
479 .trigger = jh7110_tdm_trigger,
480 .set_fmt = jh7110_tdm_set_dai_fmt,
481};
482
483#define JH7110_TDM_RATES SNDRV_PCM_RATE_8000_48000
484
485#define JH7110_TDM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
486 SNDRV_PCM_FMTBIT_S32_LE)
487
488static struct snd_soc_dai_driver jh7110_tdm_dai = {
489 .name = "sf_tdm",
490 .id = 0,
491 .playback = {
492 .stream_name = "Playback",
493 .channels_min = 1,
494 .channels_max = 8,
495 .rates = JH7110_TDM_RATES,
496 .formats = JH7110_TDM_FORMATS,
497 },
498 .capture = {
499 .stream_name = "Capture",
500 .channels_min = 1,
501 .channels_max = 8,
502 .rates = JH7110_TDM_RATES,
503 .formats = JH7110_TDM_FORMATS,
504 },
505 .ops = &jh7110_tdm_dai_ops,
506 .symmetric_rate = 1,
507};
508
509static const struct snd_pcm_hardware jh7110_pcm_hardware = {
510 .info = (SNDRV_PCM_INFO_MMAP |
511 SNDRV_PCM_INFO_MMAP_VALID |
512 SNDRV_PCM_INFO_PAUSE |
513 SNDRV_PCM_INFO_RESUME |
514 SNDRV_PCM_INFO_INTERLEAVED |
515 SNDRV_PCM_INFO_BLOCK_TRANSFER),
516 .buffer_bytes_max = 192512,
517 .period_bytes_min = 4096,
518 .period_bytes_max = 32768,
519 .periods_min = 1,
520 .periods_max = 48,
521 .fifo_size = 16,
522};
523
524static const struct snd_dmaengine_pcm_config jh7110_dmaengine_pcm_config = {
525 .pcm_hardware = &jh7110_pcm_hardware,
526 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
527 .prealloc_buffer_size = 192512,
528};
529
530static void jh7110_tdm_init_params(struct jh7110_tdm_dev *tdm)
531{
532 tdm->clkpolity = TDM_TX_RASING_RX_FALLING;
533 tdm->elm = TDM_ELM_LATE;
534 tdm->syncm = TDM_SYNCM_SHORT;
535
536 tdm->rx.ifl = TDM_FIFO_HALF;
537 tdm->tx.ifl = TDM_FIFO_HALF;
538 tdm->rx.wl = TDM_16BIT_WORD_LEN;
539 tdm->tx.wl = TDM_16BIT_WORD_LEN;
540 tdm->rx.sscale = 2;
541 tdm->tx.sscale = 2;
542 tdm->rx.lrj = TDM_LEFT_JUSTIFT;
543 tdm->tx.lrj = TDM_LEFT_JUSTIFT;
544
545 tdm->play_dma_data.addr = JH7110_TDM_FIFO;
546 tdm->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
547 tdm->play_dma_data.fifo_size = JH7110_TDM_FIFO_DEPTH / 2;
548 tdm->play_dma_data.maxburst = 16;
549
550 tdm->capture_dma_data.addr = JH7110_TDM_FIFO;
551 tdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
552 tdm->capture_dma_data.fifo_size = JH7110_TDM_FIFO_DEPTH / 2;
553 tdm->capture_dma_data.maxburst = 8;
554}
555
556static int jh7110_tdm_clk_reset_get(struct platform_device *pdev,
557 struct jh7110_tdm_dev *tdm)
558{
559 int ret;
560
561 tdm->clks[0].id = "mclk_inner";
562 tdm->clks[1].id = "tdm_ahb";
563 tdm->clks[2].id = "tdm_apb";
564 tdm->clks[3].id = "tdm_internal";
565 tdm->clks[4].id = "tdm_ext";
566 tdm->clks[5].id = "tdm";
567
568 ret = devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(tdm->clks), tdm->clks);
569 if (ret) {
570 dev_err(&pdev->dev, "Failed to get tdm clocks\n");
571 return ret;
572 }
573
574 tdm->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
575 if (IS_ERR(tdm->resets)) {
576 dev_err(&pdev->dev, "Failed to get tdm resets\n");
577 return PTR_ERR(tdm->resets);
578 }
579
580 return 0;
581}
582
583static int jh7110_tdm_probe(struct platform_device *pdev)
584{
585 struct jh7110_tdm_dev *tdm;
586 int ret;
587
588 tdm = devm_kzalloc(&pdev->dev, sizeof(*tdm), GFP_KERNEL);
589 if (!tdm)
590 return -ENOMEM;
591
592 tdm->tdm_base = devm_platform_ioremap_resource(pdev, 0);
593 if (IS_ERR(tdm->tdm_base))
594 return PTR_ERR(tdm->tdm_base);
595
596 tdm->dev = &pdev->dev;
597
598 ret = jh7110_tdm_clk_reset_get(pdev, tdm);
599 if (ret) {
600 dev_err(&pdev->dev, "Failed to enable audio-tdm clock\n");
601 return ret;
602 }
603
604 jh7110_tdm_init_params(tdm);
605
606 dev_set_drvdata(&pdev->dev, tdm);
607 ret = devm_snd_soc_register_component(&pdev->dev, &jh7110_tdm_component,
608 &jh7110_tdm_dai, 1);
609 if (ret) {
610 dev_err(&pdev->dev, "Failed to register dai\n");
611 return ret;
612 }
613
614 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
615 &jh7110_dmaengine_pcm_config,
616 SND_DMAENGINE_PCM_FLAG_COMPAT);
617 if (ret) {
618 dev_err(&pdev->dev, "Could not register pcm: %d\n", ret);
619 return ret;
620 }
621
622 pm_runtime_enable(&pdev->dev);
623 if (!pm_runtime_enabled(&pdev->dev)) {
624 ret = jh7110_tdm_runtime_resume(&pdev->dev);
625 if (ret)
626 goto err_pm_disable;
627 }
628
629 return 0;
630
631err_pm_disable:
632 pm_runtime_disable(&pdev->dev);
633
634 return ret;
635}
636
637static void jh7110_tdm_dev_remove(struct platform_device *pdev)
638{
639 pm_runtime_disable(&pdev->dev);
640}
641
642static const struct of_device_id jh7110_tdm_of_match[] = {
643 { .compatible = "starfive,jh7110-tdm", },
644 {}
645};
646
647MODULE_DEVICE_TABLE(of, jh7110_tdm_of_match);
648
649static const struct dev_pm_ops jh7110_tdm_pm_ops = {
650 RUNTIME_PM_OPS(jh7110_tdm_runtime_suspend,
651 jh7110_tdm_runtime_resume, NULL)
652 SYSTEM_SLEEP_PM_OPS(jh7110_tdm_system_suspend,
653 jh7110_tdm_system_resume)
654};
655
656static struct platform_driver jh7110_tdm_driver = {
657 .driver = {
658 .name = "jh7110-tdm",
659 .of_match_table = jh7110_tdm_of_match,
660 .pm = pm_ptr(&jh7110_tdm_pm_ops),
661 },
662 .probe = jh7110_tdm_probe,
663 .remove_new = jh7110_tdm_dev_remove,
664};
665module_platform_driver(jh7110_tdm_driver);
666
667MODULE_DESCRIPTION("StarFive JH7110 TDM ASoC Driver");
668MODULE_AUTHOR("Walker Chen <walker.chen@starfivetech.com>");
669MODULE_LICENSE("GPL");