1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Midas audio support
4 //
5 // Copyright (C) 2018 Simon Shields <simon@lineageos.org>
6 // Copyright (C) 2020 Samsung Electronics Co., Ltd.
7
8 #include <linux/clk.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/mfd/wm8994/registers.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_device.h>
14 #include <linux/of_gpio.h>
15 #include <linux/regulator/consumer.h>
16 #include <sound/jack.h>
17 #include <sound/soc.h>
18 #include <sound/soc-dapm.h>
19
20 #include "i2s.h"
21 #include "../codecs/wm8994.h"
22
23 /*
24 * The MCLK1 clock source is XCLKOUT with its mux set to the external fixed rate
25 * oscillator (XXTI).
26 */
27 #define MCLK1_RATE 24000000U
28 #define MCLK2_RATE 32768U
29 #define DEFAULT_FLL1_RATE 11289600U
30
31 struct midas_priv {
32 struct regulator *reg_mic_bias;
33 struct regulator *reg_submic_bias;
34 struct gpio_desc *gpio_fm_sel;
35 struct gpio_desc *gpio_lineout_sel;
36 unsigned int fll1_rate;
37
38 struct snd_soc_jack headset_jack;
39 };
40
41 static struct snd_soc_jack_pin headset_jack_pins[] = {
42 {
43 .pin = "Headphone",
44 .mask = SND_JACK_HEADPHONE,
45 },
46 {
47 .pin = "Headset Mic",
48 .mask = SND_JACK_MICROPHONE,
49 },
50 };
51
midas_start_fll1(struct snd_soc_pcm_runtime * rtd,unsigned int rate)52 static int midas_start_fll1(struct snd_soc_pcm_runtime *rtd, unsigned int rate)
53 {
54 struct snd_soc_card *card = rtd->card;
55 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
56 struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
57 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
58 int ret;
59
60 if (!rate)
61 rate = priv->fll1_rate;
62 /*
63 * If no new rate is requested, set FLL1 to a sane default for jack
64 * detection.
65 */
66 if (!rate)
67 rate = DEFAULT_FLL1_RATE;
68
69 if (rate != priv->fll1_rate && priv->fll1_rate) {
70 /* while reconfiguring, switch to MCLK2 for SYSCLK */
71 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
72 MCLK2_RATE, SND_SOC_CLOCK_IN);
73 if (ret < 0) {
74 dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);
75 return ret;
76 }
77 }
78
79 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
80 MCLK1_RATE, rate);
81 if (ret < 0) {
82 dev_err(card->dev, "Failed to set FLL1 rate: %d\n", ret);
83 return ret;
84 }
85 priv->fll1_rate = rate;
86
87 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1,
88 priv->fll1_rate, SND_SOC_CLOCK_IN);
89 if (ret < 0) {
90 dev_err(card->dev, "Failed to set SYSCLK source: %d\n", ret);
91 return ret;
92 }
93
94 ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, 0,
95 SAMSUNG_I2S_OPCLK_PCLK);
96 if (ret < 0) {
97 dev_err(card->dev, "Failed to set OPCLK source: %d\n", ret);
98 return ret;
99 }
100
101 return 0;
102 }
103
midas_stop_fll1(struct snd_soc_pcm_runtime * rtd)104 static int midas_stop_fll1(struct snd_soc_pcm_runtime *rtd)
105 {
106 struct snd_soc_card *card = rtd->card;
107 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
108 struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
109 int ret;
110
111 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
112 MCLK2_RATE, SND_SOC_CLOCK_IN);
113 if (ret < 0) {
114 dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);
115 return ret;
116 }
117
118 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0);
119 if (ret < 0) {
120 dev_err(card->dev, "Unable to stop FLL1: %d\n", ret);
121 return ret;
122 }
123
124 priv->fll1_rate = 0;
125
126 return 0;
127 }
128
midas_aif1_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)129 static int midas_aif1_hw_params(struct snd_pcm_substream *substream,
130 struct snd_pcm_hw_params *params)
131 {
132 struct snd_soc_pcm_runtime *rtd = substream->private_data;
133 unsigned int pll_out;
134
135 /* AIF1CLK should be at least 3MHz for "optimal performance" */
136 if (params_rate(params) == 8000 || params_rate(params) == 11025)
137 pll_out = params_rate(params) * 512;
138 else
139 pll_out = params_rate(params) * 256;
140
141 return midas_start_fll1(rtd, pll_out);
142 }
143
144 static const struct snd_soc_ops midas_aif1_ops = {
145 .hw_params = midas_aif1_hw_params,
146 };
147
148 /*
149 * We only have a single external speaker, so mix stereo data
150 * to a single mono stream.
151 */
midas_ext_spkmode(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)152 static int midas_ext_spkmode(struct snd_soc_dapm_widget *w,
153 struct snd_kcontrol *kcontrol, int event)
154 {
155 struct snd_soc_component *codec = snd_soc_dapm_to_component(w->dapm);
156 int ret = 0;
157
158 switch (event) {
159 case SND_SOC_DAPM_PRE_PMU:
160 ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,
161 WM8994_SPKMIXR_TO_SPKOUTL_MASK,
162 WM8994_SPKMIXR_TO_SPKOUTL);
163 break;
164 case SND_SOC_DAPM_POST_PMD:
165 ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,
166 WM8994_SPKMIXR_TO_SPKOUTL_MASK,
167 0);
168 break;
169 }
170
171 return ret;
172 }
173
midas_mic_bias(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)174 static int midas_mic_bias(struct snd_soc_dapm_widget *w,
175 struct snd_kcontrol *kcontrol, int event)
176 {
177 struct snd_soc_card *card = w->dapm->card;
178 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
179
180 switch (event) {
181 case SND_SOC_DAPM_PRE_PMU:
182 return regulator_enable(priv->reg_mic_bias);
183 case SND_SOC_DAPM_POST_PMD:
184 return regulator_disable(priv->reg_mic_bias);
185 }
186
187 return 0;
188 }
189
midas_submic_bias(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)190 static int midas_submic_bias(struct snd_soc_dapm_widget *w,
191 struct snd_kcontrol *kcontrol, int event)
192 {
193 struct snd_soc_card *card = w->dapm->card;
194 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
195
196 switch (event) {
197 case SND_SOC_DAPM_PRE_PMU:
198 return regulator_enable(priv->reg_submic_bias);
199 case SND_SOC_DAPM_POST_PMD:
200 return regulator_disable(priv->reg_submic_bias);
201 }
202
203 return 0;
204 }
205
midas_fm_set(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)206 static int midas_fm_set(struct snd_soc_dapm_widget *w,
207 struct snd_kcontrol *kcontrol, int event)
208 {
209 struct snd_soc_card *card = w->dapm->card;
210 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
211
212 if (!priv->gpio_fm_sel)
213 return 0;
214
215 switch (event) {
216 case SND_SOC_DAPM_PRE_PMU:
217 gpiod_set_value_cansleep(priv->gpio_fm_sel, 1);
218 break;
219 case SND_SOC_DAPM_POST_PMD:
220 gpiod_set_value_cansleep(priv->gpio_fm_sel, 0);
221 break;
222 }
223
224 return 0;
225 }
226
midas_line_set(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)227 static int midas_line_set(struct snd_soc_dapm_widget *w,
228 struct snd_kcontrol *kcontrol, int event)
229 {
230 struct snd_soc_card *card = w->dapm->card;
231 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
232
233 if (!priv->gpio_lineout_sel)
234 return 0;
235
236 switch (event) {
237 case SND_SOC_DAPM_PRE_PMU:
238 gpiod_set_value_cansleep(priv->gpio_lineout_sel, 1);
239 break;
240 case SND_SOC_DAPM_POST_PMD:
241 gpiod_set_value_cansleep(priv->gpio_lineout_sel, 0);
242 break;
243 }
244
245 return 0;
246 }
247
248 static const struct snd_kcontrol_new midas_controls[] = {
249 SOC_DAPM_PIN_SWITCH("HP"),
250
251 SOC_DAPM_PIN_SWITCH("SPK"),
252 SOC_DAPM_PIN_SWITCH("RCV"),
253
254 SOC_DAPM_PIN_SWITCH("LINE"),
255 SOC_DAPM_PIN_SWITCH("HDMI"),
256
257 SOC_DAPM_PIN_SWITCH("Main Mic"),
258 SOC_DAPM_PIN_SWITCH("Sub Mic"),
259 SOC_DAPM_PIN_SWITCH("Headset Mic"),
260
261 SOC_DAPM_PIN_SWITCH("FM In"),
262 };
263
264 static const struct snd_soc_dapm_widget midas_dapm_widgets[] = {
265 SND_SOC_DAPM_HP("HP", NULL),
266
267 SND_SOC_DAPM_SPK("SPK", midas_ext_spkmode),
268 SND_SOC_DAPM_SPK("RCV", NULL),
269
270 /* FIXME: toggle MAX77693 on i9300/i9305 */
271 SND_SOC_DAPM_LINE("LINE", midas_line_set),
272 SND_SOC_DAPM_LINE("HDMI", NULL),
273 SND_SOC_DAPM_LINE("FM In", midas_fm_set),
274
275 SND_SOC_DAPM_HP("Headphone", NULL),
276 SND_SOC_DAPM_MIC("Headset Mic", NULL),
277 SND_SOC_DAPM_MIC("Main Mic", midas_mic_bias),
278 SND_SOC_DAPM_MIC("Sub Mic", midas_submic_bias),
279 };
280
midas_set_bias_level(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)281 static int midas_set_bias_level(struct snd_soc_card *card,
282 struct snd_soc_dapm_context *dapm,
283 enum snd_soc_bias_level level)
284 {
285 struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,
286 &card->dai_link[0]);
287 struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
288
289 if (dapm->dev != aif1_dai->dev)
290 return 0;
291
292 switch (level) {
293 case SND_SOC_BIAS_STANDBY:
294 return midas_stop_fll1(rtd);
295 case SND_SOC_BIAS_PREPARE:
296 return midas_start_fll1(rtd, 0);
297 default:
298 break;
299 }
300
301 return 0;
302 }
303
midas_late_probe(struct snd_soc_card * card)304 static int midas_late_probe(struct snd_soc_card *card)
305 {
306 struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,
307 &card->dai_link[0]);
308 struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
309 struct midas_priv *priv = snd_soc_card_get_drvdata(card);
310 int ret;
311
312 /* Use MCLK2 as SYSCLK for boot */
313 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, MCLK2_RATE,
314 SND_SOC_CLOCK_IN);
315 if (ret < 0) {
316 dev_err(aif1_dai->dev, "Failed to switch to MCLK2: %d\n", ret);
317 return ret;
318 }
319
320 ret = snd_soc_card_jack_new_pins(card, "Headset",
321 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
322 SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2 |
323 SND_JACK_BTN_3 | SND_JACK_BTN_4 | SND_JACK_BTN_5,
324 &priv->headset_jack,
325 headset_jack_pins,
326 ARRAY_SIZE(headset_jack_pins));
327 if (ret)
328 return ret;
329
330 wm8958_mic_detect(aif1_dai->component, &priv->headset_jack,
331 NULL, NULL, NULL, NULL);
332 return 0;
333 }
334
335 static struct snd_soc_dai_driver midas_ext_dai[] = {
336 {
337 .name = "Voice call",
338 .playback = {
339 .channels_min = 1,
340 .channels_max = 2,
341 .rate_min = 8000,
342 .rate_max = 16000,
343 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
344 .formats = SNDRV_PCM_FMTBIT_S16_LE,
345 },
346 .capture = {
347 .channels_min = 1,
348 .channels_max = 2,
349 .rate_min = 8000,
350 .rate_max = 16000,
351 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
352 .formats = SNDRV_PCM_FMTBIT_S16_LE,
353 },
354 },
355 {
356 .name = "Bluetooth",
357 .playback = {
358 .channels_min = 1,
359 .channels_max = 2,
360 .rate_min = 8000,
361 .rate_max = 16000,
362 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
363 .formats = SNDRV_PCM_FMTBIT_S16_LE,
364 },
365 .capture = {
366 .channels_min = 1,
367 .channels_max = 2,
368 .rate_min = 8000,
369 .rate_max = 16000,
370 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
371 .formats = SNDRV_PCM_FMTBIT_S16_LE,
372 },
373 },
374 };
375
376 static const struct snd_soc_component_driver midas_component = {
377 .name = "midas-audio",
378 };
379
380 SND_SOC_DAILINK_DEFS(wm1811_hifi,
381 DAILINK_COMP_ARRAY(COMP_EMPTY()),
382 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
383 DAILINK_COMP_ARRAY(COMP_EMPTY()));
384
385 SND_SOC_DAILINK_DEFS(wm1811_voice,
386 DAILINK_COMP_ARRAY(COMP_EMPTY()),
387 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif2")),
388 DAILINK_COMP_ARRAY(COMP_EMPTY()));
389
390 SND_SOC_DAILINK_DEFS(wm1811_bt,
391 DAILINK_COMP_ARRAY(COMP_EMPTY()),
392 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif3")),
393 DAILINK_COMP_ARRAY(COMP_EMPTY()));
394
395 static struct snd_soc_dai_link midas_dai[] = {
396 {
397 .name = "WM8994 AIF1",
398 .stream_name = "HiFi Primary",
399 .ops = &midas_aif1_ops,
400 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
401 SND_SOC_DAIFMT_CBM_CFM,
402 SND_SOC_DAILINK_REG(wm1811_hifi),
403 }, {
404 .name = "WM1811 Voice",
405 .stream_name = "Voice call",
406 .ignore_suspend = 1,
407 SND_SOC_DAILINK_REG(wm1811_voice),
408 }, {
409 .name = "WM1811 BT",
410 .stream_name = "Bluetooth",
411 .ignore_suspend = 1,
412 SND_SOC_DAILINK_REG(wm1811_bt),
413 },
414 };
415
416 static struct snd_soc_card midas_card = {
417 .name = "Midas WM1811",
418 .owner = THIS_MODULE,
419
420 .dai_link = midas_dai,
421 .num_links = ARRAY_SIZE(midas_dai),
422 .controls = midas_controls,
423 .num_controls = ARRAY_SIZE(midas_controls),
424 .dapm_widgets = midas_dapm_widgets,
425 .num_dapm_widgets = ARRAY_SIZE(midas_dapm_widgets),
426
427 .set_bias_level = midas_set_bias_level,
428 .late_probe = midas_late_probe,
429 };
430
midas_probe(struct platform_device * pdev)431 static int midas_probe(struct platform_device *pdev)
432 {
433 struct device_node *cpu_dai_node = NULL, *codec_dai_node = NULL;
434 struct device_node *cpu = NULL, *codec = NULL;
435 struct snd_soc_card *card = &midas_card;
436 struct device *dev = &pdev->dev;
437 static struct snd_soc_dai_link *dai_link;
438 struct midas_priv *priv;
439 int ret, i;
440
441 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
442 if (!priv)
443 return -ENOMEM;
444
445 snd_soc_card_set_drvdata(card, priv);
446 card->dev = dev;
447
448 priv->reg_mic_bias = devm_regulator_get(dev, "mic-bias");
449 if (IS_ERR(priv->reg_mic_bias)) {
450 dev_err(dev, "Failed to get mic bias regulator\n");
451 return PTR_ERR(priv->reg_mic_bias);
452 }
453
454 priv->reg_submic_bias = devm_regulator_get(dev, "submic-bias");
455 if (IS_ERR(priv->reg_submic_bias)) {
456 dev_err(dev, "Failed to get submic bias regulator\n");
457 return PTR_ERR(priv->reg_submic_bias);
458 }
459
460 priv->gpio_fm_sel = devm_gpiod_get_optional(dev, "fm-sel", GPIOD_OUT_HIGH);
461 if (IS_ERR(priv->gpio_fm_sel)) {
462 dev_err(dev, "Failed to get FM selection GPIO\n");
463 return PTR_ERR(priv->gpio_fm_sel);
464 }
465
466 priv->gpio_lineout_sel = devm_gpiod_get_optional(dev, "lineout-sel",
467 GPIOD_OUT_HIGH);
468 if (IS_ERR(priv->gpio_lineout_sel)) {
469 dev_err(dev, "Failed to get line out selection GPIO\n");
470 return PTR_ERR(priv->gpio_lineout_sel);
471 }
472
473 ret = snd_soc_of_parse_card_name(card, "model");
474 if (ret < 0) {
475 dev_err(dev, "Card name is not specified\n");
476 return ret;
477 }
478
479 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
480 if (ret < 0) {
481 /* Backwards compatible way */
482 ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");
483 if (ret < 0) {
484 dev_err(dev, "Audio routing invalid/unspecified\n");
485 return ret;
486 }
487 }
488
489 cpu = of_get_child_by_name(dev->of_node, "cpu");
490 if (!cpu)
491 return -EINVAL;
492
493 codec = of_get_child_by_name(dev->of_node, "codec");
494 if (!codec) {
495 of_node_put(cpu);
496 return -EINVAL;
497 }
498
499 cpu_dai_node = of_parse_phandle(cpu, "sound-dai", 0);
500 of_node_put(cpu);
501 if (!cpu_dai_node) {
502 dev_err(dev, "parsing cpu/sound-dai failed\n");
503 of_node_put(codec);
504 return -EINVAL;
505 }
506
507 codec_dai_node = of_parse_phandle(codec, "sound-dai", 0);
508 of_node_put(codec);
509 if (!codec_dai_node) {
510 dev_err(dev, "audio-codec property invalid/missing\n");
511 ret = -EINVAL;
512 goto put_cpu_dai_node;
513 }
514
515 for_each_card_prelinks(card, i, dai_link) {
516 dai_link->codecs->of_node = codec_dai_node;
517 dai_link->cpus->of_node = cpu_dai_node;
518 dai_link->platforms->of_node = cpu_dai_node;
519 }
520
521 ret = devm_snd_soc_register_component(dev, &midas_component,
522 midas_ext_dai, ARRAY_SIZE(midas_ext_dai));
523 if (ret < 0) {
524 dev_err(dev, "Failed to register component: %d\n", ret);
525 goto put_codec_dai_node;
526 }
527
528 ret = devm_snd_soc_register_card(dev, card);
529 if (ret < 0) {
530 dev_err(dev, "Failed to register card: %d\n", ret);
531 goto put_codec_dai_node;
532 }
533
534 return 0;
535
536 put_codec_dai_node:
537 of_node_put(codec_dai_node);
538 put_cpu_dai_node:
539 of_node_put(cpu_dai_node);
540 return ret;
541 }
542
543 static const struct of_device_id midas_of_match[] = {
544 { .compatible = "samsung,midas-audio" },
545 { },
546 };
547 MODULE_DEVICE_TABLE(of, midas_of_match);
548
549 static struct platform_driver midas_driver = {
550 .driver = {
551 .name = "midas-audio",
552 .of_match_table = midas_of_match,
553 .pm = &snd_soc_pm_ops,
554 },
555 .probe = midas_probe,
556 };
557 module_platform_driver(midas_driver);
558
559 MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");
560 MODULE_DESCRIPTION("ASoC support for Midas");
561 MODULE_LICENSE("GPL v2");
562