1
2
3
4#include <linux/clk.h>
5#include <linux/device.h>
6#include <linux/interrupt.h>
7#include <linux/kobject.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/of_address.h>
12#include <linux/of_irq.h>
13#include <linux/of_platform.h>
14#include <linux/pm_runtime.h>
15#include <linux/regmap.h>
16#include <linux/sysfs.h>
17#include <linux/types.h>
18#include <sound/dmaengine_pcm.h>
19#include <sound/pcm.h>
20#include <sound/soc.h>
21#include <sound/tlv.h>
22#include <sound/core.h>
23
24#include "fsl_micfil.h"
25#include "imx-pcm.h"
26
27#define FSL_MICFIL_RATES SNDRV_PCM_RATE_8000_48000
28#define FSL_MICFIL_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
29
30struct fsl_micfil {
31 struct platform_device *pdev;
32 struct regmap *regmap;
33 const struct fsl_micfil_soc_data *soc;
34 struct clk *busclk;
35 struct clk *mclk;
36 struct snd_dmaengine_dai_dma_data dma_params_rx;
37 unsigned int dataline;
38 char name[32];
39 int irq[MICFIL_IRQ_LINES];
40 unsigned int mclk_streams;
41 int quality;
42 bool slave_mode;
43 int channel_gain[8];
44};
45
46struct fsl_micfil_soc_data {
47 unsigned int fifos;
48 unsigned int fifo_depth;
49 unsigned int dataline;
50 bool imx;
51};
52
53static struct fsl_micfil_soc_data fsl_micfil_imx8mm = {
54 .imx = true,
55 .fifos = 8,
56 .fifo_depth = 8,
57 .dataline = 0xf,
58};
59
60static const struct of_device_id fsl_micfil_dt_ids[] = {
61 { .compatible = "fsl,imx8mm-micfil", .data = &fsl_micfil_imx8mm },
62 {}
63};
64MODULE_DEVICE_TABLE(of, fsl_micfil_dt_ids);
65
66
67
68
69
70
71
72
73
74static const char * const micfil_quality_select_texts[] = {
75 "Medium", "High",
76 "N/A", "N/A",
77 "VLow2", "VLow1",
78 "VLow0", "Low",
79};
80
81static const struct soc_enum fsl_micfil_quality_enum =
82 SOC_ENUM_SINGLE(REG_MICFIL_CTRL2,
83 MICFIL_CTRL2_QSEL_SHIFT,
84 ARRAY_SIZE(micfil_quality_select_texts),
85 micfil_quality_select_texts);
86
87static DECLARE_TLV_DB_SCALE(gain_tlv, 0, 100, 0);
88
89static const struct snd_kcontrol_new fsl_micfil_snd_controls[] = {
90 SOC_SINGLE_SX_TLV("CH0 Volume", REG_MICFIL_OUT_CTRL,
91 MICFIL_OUTGAIN_CHX_SHIFT(0), 0xF, 0x7, gain_tlv),
92 SOC_SINGLE_SX_TLV("CH1 Volume", REG_MICFIL_OUT_CTRL,
93 MICFIL_OUTGAIN_CHX_SHIFT(1), 0xF, 0x7, gain_tlv),
94 SOC_SINGLE_SX_TLV("CH2 Volume", REG_MICFIL_OUT_CTRL,
95 MICFIL_OUTGAIN_CHX_SHIFT(2), 0xF, 0x7, gain_tlv),
96 SOC_SINGLE_SX_TLV("CH3 Volume", REG_MICFIL_OUT_CTRL,
97 MICFIL_OUTGAIN_CHX_SHIFT(3), 0xF, 0x7, gain_tlv),
98 SOC_SINGLE_SX_TLV("CH4 Volume", REG_MICFIL_OUT_CTRL,
99 MICFIL_OUTGAIN_CHX_SHIFT(4), 0xF, 0x7, gain_tlv),
100 SOC_SINGLE_SX_TLV("CH5 Volume", REG_MICFIL_OUT_CTRL,
101 MICFIL_OUTGAIN_CHX_SHIFT(5), 0xF, 0x7, gain_tlv),
102 SOC_SINGLE_SX_TLV("CH6 Volume", REG_MICFIL_OUT_CTRL,
103 MICFIL_OUTGAIN_CHX_SHIFT(6), 0xF, 0x7, gain_tlv),
104 SOC_SINGLE_SX_TLV("CH7 Volume", REG_MICFIL_OUT_CTRL,
105 MICFIL_OUTGAIN_CHX_SHIFT(7), 0xF, 0x7, gain_tlv),
106 SOC_ENUM_EXT("MICFIL Quality Select",
107 fsl_micfil_quality_enum,
108 snd_soc_get_enum_double, snd_soc_put_enum_double),
109};
110
111static inline int get_pdm_clk(struct fsl_micfil *micfil,
112 unsigned int rate)
113{
114 u32 ctrl2_reg;
115 int qsel, osr;
116 int bclk;
117
118 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
119 osr = 16 - ((ctrl2_reg & MICFIL_CTRL2_CICOSR_MASK)
120 >> MICFIL_CTRL2_CICOSR_SHIFT);
121
122 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
123 qsel = ctrl2_reg & MICFIL_CTRL2_QSEL_MASK;
124
125 switch (qsel) {
126 case MICFIL_HIGH_QUALITY:
127 bclk = rate * 8 * osr / 2;
128 break;
129 case MICFIL_MEDIUM_QUALITY:
130 case MICFIL_VLOW0_QUALITY:
131 bclk = rate * 4 * osr * 1;
132 break;
133 case MICFIL_LOW_QUALITY:
134 case MICFIL_VLOW1_QUALITY:
135 bclk = rate * 2 * osr * 2;
136 break;
137 case MICFIL_VLOW2_QUALITY:
138 bclk = rate * osr * 4;
139 break;
140 default:
141 dev_err(&micfil->pdev->dev,
142 "Please make sure you select a valid quality.\n");
143 bclk = -1;
144 break;
145 }
146
147 return bclk;
148}
149
150static inline int get_clk_div(struct fsl_micfil *micfil,
151 unsigned int rate)
152{
153 u32 ctrl2_reg;
154 long mclk_rate;
155 int clk_div;
156
157 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
158
159 mclk_rate = clk_get_rate(micfil->mclk);
160
161 clk_div = mclk_rate / (get_pdm_clk(micfil, rate) * 2);
162
163 return clk_div;
164}
165
166
167
168
169
170
171static int fsl_micfil_reset(struct device *dev)
172{
173 struct fsl_micfil *micfil = dev_get_drvdata(dev);
174 int ret;
175
176 ret = regmap_update_bits(micfil->regmap,
177 REG_MICFIL_CTRL1,
178 MICFIL_CTRL1_MDIS_MASK,
179 0);
180 if (ret) {
181 dev_err(dev, "failed to clear MDIS bit %d\n", ret);
182 return ret;
183 }
184
185 ret = regmap_update_bits(micfil->regmap,
186 REG_MICFIL_CTRL1,
187 MICFIL_CTRL1_SRES_MASK,
188 MICFIL_CTRL1_SRES);
189 if (ret) {
190 dev_err(dev, "failed to reset MICFIL: %d\n", ret);
191 return ret;
192 }
193
194 return 0;
195}
196
197static int fsl_micfil_set_mclk_rate(struct fsl_micfil *micfil,
198 unsigned int freq)
199{
200 struct device *dev = &micfil->pdev->dev;
201 int ret;
202
203 clk_disable_unprepare(micfil->mclk);
204
205 ret = clk_set_rate(micfil->mclk, freq * 1024);
206 if (ret)
207 dev_warn(dev, "failed to set rate (%u): %d\n",
208 freq * 1024, ret);
209
210 clk_prepare_enable(micfil->mclk);
211
212 return ret;
213}
214
215static int fsl_micfil_startup(struct snd_pcm_substream *substream,
216 struct snd_soc_dai *dai)
217{
218 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
219
220 if (!micfil) {
221 dev_err(dai->dev, "micfil dai priv_data not set\n");
222 return -EINVAL;
223 }
224
225 return 0;
226}
227
228static int fsl_micfil_trigger(struct snd_pcm_substream *substream, int cmd,
229 struct snd_soc_dai *dai)
230{
231 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
232 struct device *dev = &micfil->pdev->dev;
233 int ret;
234
235 switch (cmd) {
236 case SNDRV_PCM_TRIGGER_START:
237 case SNDRV_PCM_TRIGGER_RESUME:
238 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
239 ret = fsl_micfil_reset(dev);
240 if (ret) {
241 dev_err(dev, "failed to soft reset\n");
242 return ret;
243 }
244
245
246
247
248
249
250
251 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
252 MICFIL_CTRL1_DISEL_MASK,
253 (1 << MICFIL_CTRL1_DISEL_SHIFT));
254 if (ret) {
255 dev_err(dev, "failed to update DISEL bits\n");
256 return ret;
257 }
258
259
260 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
261 MICFIL_CTRL1_PDMIEN_MASK,
262 MICFIL_CTRL1_PDMIEN);
263 if (ret) {
264 dev_err(dev, "failed to enable the module\n");
265 return ret;
266 }
267
268 break;
269 case SNDRV_PCM_TRIGGER_STOP:
270 case SNDRV_PCM_TRIGGER_SUSPEND:
271 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
272
273 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
274 MICFIL_CTRL1_PDMIEN_MASK,
275 0);
276 if (ret) {
277 dev_err(dev, "failed to enable the module\n");
278 return ret;
279 }
280
281 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
282 MICFIL_CTRL1_DISEL_MASK,
283 (0 << MICFIL_CTRL1_DISEL_SHIFT));
284 if (ret) {
285 dev_err(dev, "failed to update DISEL bits\n");
286 return ret;
287 }
288 break;
289 default:
290 return -EINVAL;
291 }
292 return 0;
293}
294
295static int fsl_set_clock_params(struct device *dev, unsigned int rate)
296{
297 struct fsl_micfil *micfil = dev_get_drvdata(dev);
298 int clk_div;
299 int ret;
300
301 ret = fsl_micfil_set_mclk_rate(micfil, rate);
302 if (ret < 0)
303 dev_err(dev, "failed to set mclk[%lu] to rate %u\n",
304 clk_get_rate(micfil->mclk), rate);
305
306
307 ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
308 MICFIL_CTRL2_CICOSR_MASK,
309 MICFIL_CTRL2_OSR_DEFAULT);
310 if (ret)
311 dev_err(dev, "failed to set CICOSR in reg 0x%X\n",
312 REG_MICFIL_CTRL2);
313
314
315 clk_div = get_clk_div(micfil, rate);
316 if (clk_div < 0)
317 ret = -EINVAL;
318
319 ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
320 MICFIL_CTRL2_CLKDIV_MASK, clk_div);
321 if (ret)
322 dev_err(dev, "failed to set CLKDIV in reg 0x%X\n",
323 REG_MICFIL_CTRL2);
324
325 return ret;
326}
327
328static int fsl_micfil_hw_params(struct snd_pcm_substream *substream,
329 struct snd_pcm_hw_params *params,
330 struct snd_soc_dai *dai)
331{
332 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
333 unsigned int channels = params_channels(params);
334 unsigned int rate = params_rate(params);
335 struct device *dev = &micfil->pdev->dev;
336 int ret;
337
338
339 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
340 MICFIL_CTRL1_PDMIEN_MASK, 0);
341 if (ret) {
342 dev_err(dev, "failed to disable the module\n");
343 return ret;
344 }
345
346
347 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
348 0xFF, ((1 << channels) - 1));
349 if (ret) {
350 dev_err(dev, "failed to enable channels %d, reg 0x%X\n", ret,
351 REG_MICFIL_CTRL1);
352 return ret;
353 }
354
355 ret = fsl_set_clock_params(dev, rate);
356 if (ret < 0) {
357 dev_err(dev, "Failed to set clock parameters [%d]\n", ret);
358 return ret;
359 }
360
361 micfil->dma_params_rx.maxburst = channels * MICFIL_DMA_MAXBURST_RX;
362
363 return 0;
364}
365
366static int fsl_micfil_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
367 unsigned int freq, int dir)
368{
369 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
370 struct device *dev = &micfil->pdev->dev;
371
372 int ret;
373
374 if (!freq)
375 return 0;
376
377 ret = fsl_micfil_set_mclk_rate(micfil, freq);
378 if (ret < 0)
379 dev_err(dev, "failed to set mclk[%lu] to rate %u\n",
380 clk_get_rate(micfil->mclk), freq);
381
382 return ret;
383}
384
385static const struct snd_soc_dai_ops fsl_micfil_dai_ops = {
386 .startup = fsl_micfil_startup,
387 .trigger = fsl_micfil_trigger,
388 .hw_params = fsl_micfil_hw_params,
389 .set_sysclk = fsl_micfil_set_dai_sysclk,
390};
391
392static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai)
393{
394 struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev);
395 struct device *dev = cpu_dai->dev;
396 unsigned int val;
397 int ret;
398 int i;
399
400
401 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
402 MICFIL_CTRL2_QSEL_MASK, MICFIL_MEDIUM_QUALITY);
403 if (ret) {
404 dev_err(dev, "failed to set quality mode bits, reg 0x%X\n",
405 REG_MICFIL_CTRL2);
406 return ret;
407 }
408
409
410 regmap_write(micfil->regmap, REG_MICFIL_OUT_CTRL, 0x77777777);
411 for (i = 0; i < 8; i++)
412 micfil->channel_gain[i] = 0xF;
413
414 snd_soc_dai_init_dma_data(cpu_dai, NULL,
415 &micfil->dma_params_rx);
416
417
418 val = MICFIL_FIFO_CTRL_FIFOWMK(micfil->soc->fifo_depth) - 1;
419 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_FIFO_CTRL,
420 MICFIL_FIFO_CTRL_FIFOWMK_MASK,
421 val);
422 if (ret) {
423 dev_err(dev, "failed to set FIFOWMK\n");
424 return ret;
425 }
426
427 return 0;
428}
429
430static struct snd_soc_dai_driver fsl_micfil_dai = {
431 .probe = fsl_micfil_dai_probe,
432 .capture = {
433 .stream_name = "CPU-Capture",
434 .channels_min = 1,
435 .channels_max = 8,
436 .rates = FSL_MICFIL_RATES,
437 .formats = FSL_MICFIL_FORMATS,
438 },
439 .ops = &fsl_micfil_dai_ops,
440};
441
442static const struct snd_soc_component_driver fsl_micfil_component = {
443 .name = "fsl-micfil-dai",
444 .controls = fsl_micfil_snd_controls,
445 .num_controls = ARRAY_SIZE(fsl_micfil_snd_controls),
446
447};
448
449
450static const struct reg_default fsl_micfil_reg_defaults[] = {
451 {REG_MICFIL_CTRL1, 0x00000000},
452 {REG_MICFIL_CTRL2, 0x00000000},
453 {REG_MICFIL_STAT, 0x00000000},
454 {REG_MICFIL_FIFO_CTRL, 0x00000007},
455 {REG_MICFIL_FIFO_STAT, 0x00000000},
456 {REG_MICFIL_DATACH0, 0x00000000},
457 {REG_MICFIL_DATACH1, 0x00000000},
458 {REG_MICFIL_DATACH2, 0x00000000},
459 {REG_MICFIL_DATACH3, 0x00000000},
460 {REG_MICFIL_DATACH4, 0x00000000},
461 {REG_MICFIL_DATACH5, 0x00000000},
462 {REG_MICFIL_DATACH6, 0x00000000},
463 {REG_MICFIL_DATACH7, 0x00000000},
464 {REG_MICFIL_DC_CTRL, 0x00000000},
465 {REG_MICFIL_OUT_CTRL, 0x00000000},
466 {REG_MICFIL_OUT_STAT, 0x00000000},
467 {REG_MICFIL_VAD0_CTRL1, 0x00000000},
468 {REG_MICFIL_VAD0_CTRL2, 0x000A0000},
469 {REG_MICFIL_VAD0_STAT, 0x00000000},
470 {REG_MICFIL_VAD0_SCONFIG, 0x00000000},
471 {REG_MICFIL_VAD0_NCONFIG, 0x80000000},
472 {REG_MICFIL_VAD0_NDATA, 0x00000000},
473 {REG_MICFIL_VAD0_ZCD, 0x00000004},
474};
475
476static bool fsl_micfil_readable_reg(struct device *dev, unsigned int reg)
477{
478 switch (reg) {
479 case REG_MICFIL_CTRL1:
480 case REG_MICFIL_CTRL2:
481 case REG_MICFIL_STAT:
482 case REG_MICFIL_FIFO_CTRL:
483 case REG_MICFIL_FIFO_STAT:
484 case REG_MICFIL_DATACH0:
485 case REG_MICFIL_DATACH1:
486 case REG_MICFIL_DATACH2:
487 case REG_MICFIL_DATACH3:
488 case REG_MICFIL_DATACH4:
489 case REG_MICFIL_DATACH5:
490 case REG_MICFIL_DATACH6:
491 case REG_MICFIL_DATACH7:
492 case REG_MICFIL_DC_CTRL:
493 case REG_MICFIL_OUT_CTRL:
494 case REG_MICFIL_OUT_STAT:
495 case REG_MICFIL_VAD0_CTRL1:
496 case REG_MICFIL_VAD0_CTRL2:
497 case REG_MICFIL_VAD0_STAT:
498 case REG_MICFIL_VAD0_SCONFIG:
499 case REG_MICFIL_VAD0_NCONFIG:
500 case REG_MICFIL_VAD0_NDATA:
501 case REG_MICFIL_VAD0_ZCD:
502 return true;
503 default:
504 return false;
505 }
506}
507
508static bool fsl_micfil_writeable_reg(struct device *dev, unsigned int reg)
509{
510 switch (reg) {
511 case REG_MICFIL_CTRL1:
512 case REG_MICFIL_CTRL2:
513 case REG_MICFIL_STAT:
514 case REG_MICFIL_FIFO_CTRL:
515 case REG_MICFIL_FIFO_STAT:
516 case REG_MICFIL_DC_CTRL:
517 case REG_MICFIL_OUT_CTRL:
518 case REG_MICFIL_OUT_STAT:
519 case REG_MICFIL_VAD0_CTRL1:
520 case REG_MICFIL_VAD0_CTRL2:
521 case REG_MICFIL_VAD0_STAT:
522 case REG_MICFIL_VAD0_SCONFIG:
523 case REG_MICFIL_VAD0_NCONFIG:
524 case REG_MICFIL_VAD0_ZCD:
525 return true;
526 default:
527 return false;
528 }
529}
530
531static bool fsl_micfil_volatile_reg(struct device *dev, unsigned int reg)
532{
533 switch (reg) {
534 case REG_MICFIL_STAT:
535 case REG_MICFIL_DATACH0:
536 case REG_MICFIL_DATACH1:
537 case REG_MICFIL_DATACH2:
538 case REG_MICFIL_DATACH3:
539 case REG_MICFIL_DATACH4:
540 case REG_MICFIL_DATACH5:
541 case REG_MICFIL_DATACH6:
542 case REG_MICFIL_DATACH7:
543 case REG_MICFIL_VAD0_STAT:
544 case REG_MICFIL_VAD0_NDATA:
545 return true;
546 default:
547 return false;
548 }
549}
550
551static const struct regmap_config fsl_micfil_regmap_config = {
552 .reg_bits = 32,
553 .reg_stride = 4,
554 .val_bits = 32,
555
556 .max_register = REG_MICFIL_VAD0_ZCD,
557 .reg_defaults = fsl_micfil_reg_defaults,
558 .num_reg_defaults = ARRAY_SIZE(fsl_micfil_reg_defaults),
559 .readable_reg = fsl_micfil_readable_reg,
560 .volatile_reg = fsl_micfil_volatile_reg,
561 .writeable_reg = fsl_micfil_writeable_reg,
562 .cache_type = REGCACHE_RBTREE,
563};
564
565
566
567static irqreturn_t micfil_isr(int irq, void *devid)
568{
569 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
570 struct platform_device *pdev = micfil->pdev;
571 u32 stat_reg;
572 u32 fifo_stat_reg;
573 u32 ctrl1_reg;
574 bool dma_enabled;
575 int i;
576
577 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
578 regmap_read(micfil->regmap, REG_MICFIL_CTRL1, &ctrl1_reg);
579 regmap_read(micfil->regmap, REG_MICFIL_FIFO_STAT, &fifo_stat_reg);
580
581 dma_enabled = MICFIL_DMA_ENABLED(ctrl1_reg);
582
583
584 for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++) {
585 if (stat_reg & MICFIL_STAT_CHXF_MASK(i))
586 dev_dbg(&pdev->dev,
587 "Data available in Data Channel %d\n", i);
588
589
590
591 if (!dma_enabled)
592 regmap_write_bits(micfil->regmap,
593 REG_MICFIL_STAT,
594 MICFIL_STAT_CHXF_MASK(i),
595 1);
596 }
597
598 for (i = 0; i < MICFIL_FIFO_NUM; i++) {
599 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_OVER_MASK(i))
600 dev_dbg(&pdev->dev,
601 "FIFO Overflow Exception flag for channel %d\n",
602 i);
603
604 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_UNDER_MASK(i))
605 dev_dbg(&pdev->dev,
606 "FIFO Underflow Exception flag for channel %d\n",
607 i);
608 }
609
610 return IRQ_HANDLED;
611}
612
613static irqreturn_t micfil_err_isr(int irq, void *devid)
614{
615 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
616 struct platform_device *pdev = micfil->pdev;
617 u32 stat_reg;
618
619 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
620
621 if (stat_reg & MICFIL_STAT_BSY_FIL_MASK)
622 dev_dbg(&pdev->dev, "isr: Decimation Filter is running\n");
623
624 if (stat_reg & MICFIL_STAT_FIR_RDY_MASK)
625 dev_dbg(&pdev->dev, "isr: FIR Filter Data ready\n");
626
627 if (stat_reg & MICFIL_STAT_LOWFREQF_MASK) {
628 dev_dbg(&pdev->dev, "isr: ipg_clk_app is too low\n");
629 regmap_write_bits(micfil->regmap, REG_MICFIL_STAT,
630 MICFIL_STAT_LOWFREQF_MASK, 1);
631 }
632
633 return IRQ_HANDLED;
634}
635
636static int fsl_micfil_probe(struct platform_device *pdev)
637{
638 struct device_node *np = pdev->dev.of_node;
639 struct fsl_micfil *micfil;
640 struct resource *res;
641 void __iomem *regs;
642 int ret, i;
643 unsigned long irqflag = 0;
644
645 micfil = devm_kzalloc(&pdev->dev, sizeof(*micfil), GFP_KERNEL);
646 if (!micfil)
647 return -ENOMEM;
648
649 micfil->pdev = pdev;
650 strncpy(micfil->name, np->name, sizeof(micfil->name) - 1);
651
652 micfil->soc = of_device_get_match_data(&pdev->dev);
653
654
655
656
657 micfil->mclk = devm_clk_get(&pdev->dev, "ipg_clk_app");
658 if (IS_ERR(micfil->mclk)) {
659 dev_err(&pdev->dev, "failed to get core clock: %ld\n",
660 PTR_ERR(micfil->mclk));
661 return PTR_ERR(micfil->mclk);
662 }
663
664 micfil->busclk = devm_clk_get(&pdev->dev, "ipg_clk");
665 if (IS_ERR(micfil->busclk)) {
666 dev_err(&pdev->dev, "failed to get ipg clock: %ld\n",
667 PTR_ERR(micfil->busclk));
668 return PTR_ERR(micfil->busclk);
669 }
670
671
672 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
673 if (IS_ERR(regs))
674 return PTR_ERR(regs);
675
676 micfil->regmap = devm_regmap_init_mmio(&pdev->dev,
677 regs,
678 &fsl_micfil_regmap_config);
679 if (IS_ERR(micfil->regmap)) {
680 dev_err(&pdev->dev, "failed to init MICFIL regmap: %ld\n",
681 PTR_ERR(micfil->regmap));
682 return PTR_ERR(micfil->regmap);
683 }
684
685
686 ret = of_property_read_u32_index(np,
687 "fsl,dataline",
688 0,
689 &micfil->dataline);
690 if (ret)
691 micfil->dataline = 1;
692
693 if (micfil->dataline & ~micfil->soc->dataline) {
694 dev_err(&pdev->dev, "dataline setting error, Mask is 0x%X\n",
695 micfil->soc->dataline);
696 return -EINVAL;
697 }
698
699
700 for (i = 0; i < MICFIL_IRQ_LINES; i++) {
701 micfil->irq[i] = platform_get_irq(pdev, i);
702 dev_err(&pdev->dev, "GET IRQ: %d\n", micfil->irq[i]);
703 if (micfil->irq[i] < 0)
704 return micfil->irq[i];
705 }
706
707 if (of_property_read_bool(np, "fsl,shared-interrupt"))
708 irqflag = IRQF_SHARED;
709
710
711 ret = devm_request_irq(&pdev->dev, micfil->irq[0],
712 micfil_isr, irqflag,
713 micfil->name, micfil);
714 if (ret) {
715 dev_err(&pdev->dev, "failed to claim mic interface irq %u\n",
716 micfil->irq[0]);
717 return ret;
718 }
719
720
721 ret = devm_request_irq(&pdev->dev, micfil->irq[1],
722 micfil_err_isr, irqflag,
723 micfil->name, micfil);
724 if (ret) {
725 dev_err(&pdev->dev, "failed to claim mic interface error irq %u\n",
726 micfil->irq[1]);
727 return ret;
728 }
729
730 micfil->dma_params_rx.chan_name = "rx";
731 micfil->dma_params_rx.addr = res->start + REG_MICFIL_DATACH0;
732 micfil->dma_params_rx.maxburst = MICFIL_DMA_MAXBURST_RX;
733
734
735 platform_set_drvdata(pdev, micfil);
736
737 pm_runtime_enable(&pdev->dev);
738 regcache_cache_only(micfil->regmap, true);
739
740
741
742
743
744 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
745 if (ret) {
746 dev_err(&pdev->dev, "failed to pcm register\n");
747 return ret;
748 }
749
750 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_micfil_component,
751 &fsl_micfil_dai, 1);
752 if (ret) {
753 dev_err(&pdev->dev, "failed to register component %s\n",
754 fsl_micfil_component.name);
755 }
756
757 return ret;
758}
759
760static int __maybe_unused fsl_micfil_runtime_suspend(struct device *dev)
761{
762 struct fsl_micfil *micfil = dev_get_drvdata(dev);
763
764 regcache_cache_only(micfil->regmap, true);
765
766 clk_disable_unprepare(micfil->mclk);
767 clk_disable_unprepare(micfil->busclk);
768
769 return 0;
770}
771
772static int __maybe_unused fsl_micfil_runtime_resume(struct device *dev)
773{
774 struct fsl_micfil *micfil = dev_get_drvdata(dev);
775 int ret;
776
777 ret = clk_prepare_enable(micfil->busclk);
778 if (ret < 0)
779 return ret;
780
781 ret = clk_prepare_enable(micfil->mclk);
782 if (ret < 0) {
783 clk_disable_unprepare(micfil->busclk);
784 return ret;
785 }
786
787 regcache_cache_only(micfil->regmap, false);
788 regcache_mark_dirty(micfil->regmap);
789 regcache_sync(micfil->regmap);
790
791 return 0;
792}
793
794static int __maybe_unused fsl_micfil_suspend(struct device *dev)
795{
796 pm_runtime_force_suspend(dev);
797
798 return 0;
799}
800
801static int __maybe_unused fsl_micfil_resume(struct device *dev)
802{
803 pm_runtime_force_resume(dev);
804
805 return 0;
806}
807
808static const struct dev_pm_ops fsl_micfil_pm_ops = {
809 SET_RUNTIME_PM_OPS(fsl_micfil_runtime_suspend,
810 fsl_micfil_runtime_resume,
811 NULL)
812 SET_SYSTEM_SLEEP_PM_OPS(fsl_micfil_suspend,
813 fsl_micfil_resume)
814};
815
816static struct platform_driver fsl_micfil_driver = {
817 .probe = fsl_micfil_probe,
818 .driver = {
819 .name = "fsl-micfil-dai",
820 .pm = &fsl_micfil_pm_ops,
821 .of_match_table = fsl_micfil_dt_ids,
822 },
823};
824module_platform_driver(fsl_micfil_driver);
825
826MODULE_AUTHOR("Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>");
827MODULE_DESCRIPTION("NXP PDM Microphone Interface (MICFIL) driver");
828MODULE_LICENSE("GPL v2");
829
