littlemill.c

  1// SPDX-License-Identifier: GPL-2.0+
  2//
  3// Littlemill audio support
  4//
  5// Copyright 2011 Wolfson Microelectronics
  6
  7#include <sound/soc.h>
  8#include <sound/soc-dapm.h>
  9#include <sound/jack.h>
 10#include <linux/module.h>
 11
 12#include "../codecs/wm8994.h"
 13
 14static int sample_rate = 44100;
 15
 16static int littlemill_set_bias_level(struct snd_soc_card *card,
 17					  struct snd_soc_dapm_context *dapm,
 18					  enum snd_soc_bias_level level)
 19{
 20	struct snd_soc_pcm_runtime *rtd;
 21	struct snd_soc_dai *aif1_dai;
 22	int ret;
 23
 24	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 25	aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
 26
 27	if (snd_soc_dapm_to_dev(dapm) != aif1_dai->dev)
 28		return 0;
 29
 30	switch (level) {
 31	case SND_SOC_BIAS_PREPARE:
 32		/*
 33		 * If we've not already clocked things via hw_params()
 34		 * then do so now, otherwise these are noops.
 35		 */
 36		if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_STANDBY) {
 37			ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 38						  WM8994_FLL_SRC_MCLK2, 32768,
 39						  sample_rate * 512);
 40			if (ret < 0) {
 41				pr_err("Failed to start FLL: %d\n", ret);
 42				return ret;
 43			}
 44
 45			ret = snd_soc_dai_set_sysclk(aif1_dai,
 46						     WM8994_SYSCLK_FLL1,
 47						     sample_rate * 512,
 48						     SND_SOC_CLOCK_IN);
 49			if (ret < 0) {
 50				pr_err("Failed to set SYSCLK: %d\n", ret);
 51				return ret;
 52			}
 53		}
 54		break;
 55
 56	default:
 57		break;
 58	}
 59
 60	return 0;
 61}
 62
 63static int littlemill_set_bias_level_post(struct snd_soc_card *card,
 64					       struct snd_soc_dapm_context *dapm,
 65					       enum snd_soc_bias_level level)
 66{
 67	struct snd_soc_pcm_runtime *rtd;
 68	struct snd_soc_dai *aif1_dai;
 69	int ret;
 70
 71	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 72	aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
 73
 74	if (snd_soc_dapm_to_dev(dapm) != aif1_dai->dev)
 75		return 0;
 76
 77	switch (level) {
 78	case SND_SOC_BIAS_STANDBY:
 79		ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 80					     32768, SND_SOC_CLOCK_IN);
 81		if (ret < 0) {
 82			pr_err("Failed to switch away from FLL1: %d\n", ret);
 83			return ret;
 84		}
 85
 86		ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 87					  0, 0, 0);
 88		if (ret < 0) {
 89			pr_err("Failed to stop FLL1: %d\n", ret);
 90			return ret;
 91		}
 92		break;
 93
 94	default:
 95		break;
 96	}
 97
 98	return 0;
 99}
100
101static int littlemill_hw_params(struct snd_pcm_substream *substream,
102				struct snd_pcm_hw_params *params)
103{
104	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
105	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
106	int ret;
107
108	sample_rate = params_rate(params);
109
110	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
111				  WM8994_FLL_SRC_MCLK2, 32768,
112				  sample_rate * 512);
113	if (ret < 0) {
114		pr_err("Failed to start FLL: %d\n", ret);
115		return ret;
116	}
117
118	ret = snd_soc_dai_set_sysclk(codec_dai,
119				     WM8994_SYSCLK_FLL1,
120				     sample_rate * 512,
121				     SND_SOC_CLOCK_IN);
122	if (ret < 0) {
123		pr_err("Failed to set SYSCLK: %d\n", ret);
124		return ret;
125	}
126
127	return 0;
128}
129
130static const struct snd_soc_ops littlemill_ops = {
131	.hw_params = littlemill_hw_params,
132};
133
134static const struct snd_soc_pcm_stream baseband_params = {
135	.formats = SNDRV_PCM_FMTBIT_S32_LE,
136	.rate_min = 8000,
137	.rate_max = 8000,
138	.channels_min = 2,
139	.channels_max = 2,
140};
141
142SND_SOC_DAILINK_DEFS(cpu,
143	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
144	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
145	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
146
147SND_SOC_DAILINK_DEFS(baseband,
148	DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
149	DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
150				      "wm1250-ev1")));
151
152static struct snd_soc_dai_link littlemill_dai[] = {
153	{
154		.name = "CPU",
155		.stream_name = "CPU",
156		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
157				| SND_SOC_DAIFMT_CBP_CFP,
158		.ops = &littlemill_ops,
159		SND_SOC_DAILINK_REG(cpu),
160	},
161	{
162		.name = "Baseband",
163		.stream_name = "Baseband",
164		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
165				| SND_SOC_DAIFMT_CBP_CFP,
166		.ignore_suspend = 1,
167		.c2c_params = &baseband_params,
168		.num_c2c_params = 1,
169		SND_SOC_DAILINK_REG(baseband),
170	},
171};
172
173static int bbclk_ev(struct snd_soc_dapm_widget *w,
174		    struct snd_kcontrol *kcontrol, int event)
175{
176	struct snd_soc_card *card = snd_soc_dapm_to_card(w->dapm);
177	struct snd_soc_pcm_runtime *rtd;
178	struct snd_soc_dai *aif2_dai;
179	int ret;
180
181	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
182	aif2_dai = snd_soc_rtd_to_cpu(rtd, 0);
183
184	switch (event) {
185	case SND_SOC_DAPM_PRE_PMU:
186		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
187					  WM8994_FLL_SRC_BCLK, 64 * 8000,
188					  8000 * 256);
189		if (ret < 0) {
190			pr_err("Failed to start FLL: %d\n", ret);
191			return ret;
192		}
193
194		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
195					     8000 * 256,
196					     SND_SOC_CLOCK_IN);
197		if (ret < 0) {
198			pr_err("Failed to set SYSCLK: %d\n", ret);
199			return ret;
200		}
201		break;
202	case SND_SOC_DAPM_POST_PMD:
203		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
204					     32768, SND_SOC_CLOCK_IN);
205		if (ret < 0) {
206			pr_err("Failed to switch away from FLL2: %d\n", ret);
207			return ret;
208		}
209
210		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
211					  0, 0, 0);
212		if (ret < 0) {
213			pr_err("Failed to stop FLL2: %d\n", ret);
214			return ret;
215		}
216		break;
217	default:
218		return -EINVAL;
219	}
220
221	return 0;
222}
223
224static const struct snd_kcontrol_new controls[] = {
225	SOC_DAPM_PIN_SWITCH("Headphone"),
226	SOC_DAPM_PIN_SWITCH("Headset Mic"),
227	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
228	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
229};
230
231static const struct snd_soc_dapm_widget widgets[] = {
232	SND_SOC_DAPM_HP("Headphone", NULL),
233	SND_SOC_DAPM_HP("Headset Mic", NULL),
234
235	SND_SOC_DAPM_MIC("AMIC", NULL),
236	SND_SOC_DAPM_MIC("DMIC", NULL),
237
238	SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
239			      bbclk_ev,
240			      SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
241};
242
243static const struct snd_soc_dapm_route audio_paths[] = {
244	{ "Headphone", NULL, "HPOUT1L" },
245	{ "Headphone", NULL, "HPOUT1R" },
246
247	{ "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
248	{ "IN1LN", NULL, "AMIC" },
249
250	{ "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
251	{ "DMIC1DAT", NULL, "DMIC" },
252	{ "DMIC2DAT", NULL, "DMIC" },
253
254	{ "AIF2CLK", NULL, "Baseband Clock" },
255};
256
257static struct snd_soc_jack littlemill_headset;
258static struct snd_soc_jack_pin littlemill_headset_pins[] = {
259	{
260		.pin = "Headphone",
261		.mask = SND_JACK_HEADPHONE,
262	},
263	{
264		.pin = "Headset Mic",
265		.mask = SND_JACK_MICROPHONE,
266	},
267};
268
269static int littlemill_late_probe(struct snd_soc_card *card)
270{
271	struct snd_soc_pcm_runtime *rtd;
272	struct snd_soc_component *component;
273	struct snd_soc_dai *aif1_dai;
274	struct snd_soc_dai *aif2_dai;
275	int ret;
276
277	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
278	component = snd_soc_rtd_to_codec(rtd, 0)->component;
279	aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
280
281	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
282	aif2_dai = snd_soc_rtd_to_cpu(rtd, 0);
283
284	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
285				     32768, SND_SOC_CLOCK_IN);
286	if (ret < 0)
287		return ret;
288
289	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
290				     32768, SND_SOC_CLOCK_IN);
291	if (ret < 0)
292		return ret;
293
294	ret = snd_soc_card_jack_new_pins(card, "Headset",
295					 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
296					 SND_JACK_BTN_0 | SND_JACK_BTN_1 |
297					 SND_JACK_BTN_2 | SND_JACK_BTN_3 |
298					 SND_JACK_BTN_4 | SND_JACK_BTN_5,
299					 &littlemill_headset,
300					 littlemill_headset_pins,
301					 ARRAY_SIZE(littlemill_headset_pins));
302	if (ret)
303		return ret;
304
305	/* This will check device compatibility itself */
306	wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
307
308	/* As will this */
309	wm8994_mic_detect(component, &littlemill_headset, 1);
310
311	return 0;
312}
313
314static struct snd_soc_card littlemill = {
315	.name = "Littlemill",
316	.owner = THIS_MODULE,
317	.dai_link = littlemill_dai,
318	.num_links = ARRAY_SIZE(littlemill_dai),
319
320	.set_bias_level = littlemill_set_bias_level,
321	.set_bias_level_post = littlemill_set_bias_level_post,
322
323	.controls = controls,
324	.num_controls = ARRAY_SIZE(controls),
325	.dapm_widgets = widgets,
326	.num_dapm_widgets = ARRAY_SIZE(widgets),
327	.dapm_routes = audio_paths,
328	.num_dapm_routes = ARRAY_SIZE(audio_paths),
329
330	.late_probe = littlemill_late_probe,
331};
332
333static int littlemill_probe(struct platform_device *pdev)
334{
335	struct snd_soc_card *card = &littlemill;
336	int ret;
337
338	card->dev = &pdev->dev;
339
340	ret = devm_snd_soc_register_card(&pdev->dev, card);
341	if (ret)
342		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
343
344	return ret;
345}
346
347static struct platform_driver littlemill_driver = {
348	.driver = {
349		.name = "littlemill",
350		.pm = &snd_soc_pm_ops,
351	},
352	.probe = littlemill_probe,
353};
354
355module_platform_driver(littlemill_driver);
356
357MODULE_DESCRIPTION("Littlemill audio support");
358MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
359MODULE_LICENSE("GPL");
360MODULE_ALIAS("platform:littlemill");