tobermory.c

  1// SPDX-License-Identifier: GPL-2.0+
  2//
  3// Tobermory 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/wm8962.h"
 13
 14static int sample_rate = 44100;
 15
 16static int tobermory_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 *codec_dai;
 22	int ret;
 23
 24	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 25	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 26
 27	if (snd_soc_dapm_to_dev(dapm) != codec_dai->dev)
 28		return 0;
 29
 30	switch (level) {
 31	case SND_SOC_BIAS_PREPARE:
 32		if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_STANDBY) {
 33			ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 34						  WM8962_FLL_MCLK, 32768,
 35						  sample_rate * 512);
 36			if (ret < 0)
 37				pr_err("Failed to start FLL: %d\n", ret);
 38
 39			ret = snd_soc_dai_set_sysclk(codec_dai,
 40						     WM8962_SYSCLK_FLL,
 41						     sample_rate * 512,
 42						     SND_SOC_CLOCK_IN);
 43			if (ret < 0) {
 44				pr_err("Failed to set SYSCLK: %d\n", ret);
 45				snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 46						    0, 0, 0);
 47				return ret;
 48			}
 49		}
 50		break;
 51
 52	default:
 53		break;
 54	}
 55
 56	return 0;
 57}
 58
 59static int tobermory_set_bias_level_post(struct snd_soc_card *card,
 60					       struct snd_soc_dapm_context *dapm,
 61					       enum snd_soc_bias_level level)
 62{
 63	struct snd_soc_pcm_runtime *rtd;
 64	struct snd_soc_dai *codec_dai;
 65	int ret;
 66
 67	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 68	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 69
 70	if (snd_soc_dapm_to_dev(dapm) != codec_dai->dev)
 71		return 0;
 72
 73	switch (level) {
 74	case SND_SOC_BIAS_STANDBY:
 75		ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 76					     32768, SND_SOC_CLOCK_IN);
 77		if (ret < 0) {
 78			pr_err("Failed to switch away from FLL: %d\n", ret);
 79			return ret;
 80		}
 81
 82		ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 83					  0, 0, 0);
 84		if (ret < 0) {
 85			pr_err("Failed to stop FLL: %d\n", ret);
 86			return ret;
 87		}
 88		break;
 89
 90	default:
 91		break;
 92	}
 93
 94	return 0;
 95}
 96
 97static int tobermory_hw_params(struct snd_pcm_substream *substream,
 98			      struct snd_pcm_hw_params *params)
 99{
100	sample_rate = params_rate(params);
101
102	return 0;
103}
104
105static const struct snd_soc_ops tobermory_ops = {
106	.hw_params = tobermory_hw_params,
107};
108
109SND_SOC_DAILINK_DEFS(cpu,
110	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
111	DAILINK_COMP_ARRAY(COMP_CODEC("wm8962.1-001a", "wm8962")),
112	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
113
114static struct snd_soc_dai_link tobermory_dai[] = {
115	{
116		.name = "CPU",
117		.stream_name = "CPU",
118		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
119				| SND_SOC_DAIFMT_CBP_CFP,
120		.ops = &tobermory_ops,
121		SND_SOC_DAILINK_REG(cpu),
122	},
123};
124
125static const struct snd_kcontrol_new controls[] = {
126	SOC_DAPM_PIN_SWITCH("Main Speaker"),
127	SOC_DAPM_PIN_SWITCH("DMIC"),
128};
129
130static const struct snd_soc_dapm_widget widgets[] = {
131	SND_SOC_DAPM_HP("Headphone", NULL),
132	SND_SOC_DAPM_MIC("Headset Mic", NULL),
133
134	SND_SOC_DAPM_MIC("DMIC", NULL),
135	SND_SOC_DAPM_MIC("AMIC", NULL),
136
137	SND_SOC_DAPM_SPK("Main Speaker", NULL),
138};
139
140static const struct snd_soc_dapm_route audio_paths[] = {
141	{ "Headphone", NULL, "HPOUTL" },
142	{ "Headphone", NULL, "HPOUTR" },
143
144	{ "Main Speaker", NULL, "SPKOUTL" },
145	{ "Main Speaker", NULL, "SPKOUTR" },
146
147	{ "Headset Mic", NULL, "MICBIAS" },
148	{ "IN4L", NULL, "Headset Mic" },
149	{ "IN4R", NULL, "Headset Mic" },
150
151	{ "AMIC", NULL, "MICBIAS" },
152	{ "IN1L", NULL, "AMIC" },
153	{ "IN1R", NULL, "AMIC" },
154
155	{ "DMIC", NULL, "MICBIAS" },
156	{ "DMICDAT", NULL, "DMIC" },
157};
158
159static struct snd_soc_jack tobermory_headset;
160
161/* Headset jack detection DAPM pins */
162static struct snd_soc_jack_pin tobermory_headset_pins[] = {
163	{
164		.pin = "Headset Mic",
165		.mask = SND_JACK_MICROPHONE,
166	},
167	{
168		.pin = "Headphone",
169		.mask = SND_JACK_MICROPHONE,
170	},
171};
172
173static int tobermory_late_probe(struct snd_soc_card *card)
174{
175	struct snd_soc_pcm_runtime *rtd;
176	struct snd_soc_component *component;
177	struct snd_soc_dai *codec_dai;
178	int ret;
179
180	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
181	component = snd_soc_rtd_to_codec(rtd, 0)->component;
182	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
183
184	ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
185				     32768, SND_SOC_CLOCK_IN);
186	if (ret < 0)
187		return ret;
188
189	ret = snd_soc_card_jack_new_pins(card, "Headset", SND_JACK_HEADSET |
190					 SND_JACK_BTN_0, &tobermory_headset,
191					 tobermory_headset_pins,
192					 ARRAY_SIZE(tobermory_headset_pins));
193	if (ret)
194		return ret;
195
196	wm8962_mic_detect(component, &tobermory_headset);
197
198	return 0;
199}
200
201static struct snd_soc_card tobermory = {
202	.name = "Tobermory",
203	.owner = THIS_MODULE,
204	.dai_link = tobermory_dai,
205	.num_links = ARRAY_SIZE(tobermory_dai),
206
207	.set_bias_level = tobermory_set_bias_level,
208	.set_bias_level_post = tobermory_set_bias_level_post,
209
210	.controls = controls,
211	.num_controls = ARRAY_SIZE(controls),
212	.dapm_widgets = widgets,
213	.num_dapm_widgets = ARRAY_SIZE(widgets),
214	.dapm_routes = audio_paths,
215	.num_dapm_routes = ARRAY_SIZE(audio_paths),
216	.fully_routed = true,
217
218	.late_probe = tobermory_late_probe,
219};
220
221static int tobermory_probe(struct platform_device *pdev)
222{
223	struct snd_soc_card *card = &tobermory;
224	int ret;
225
226	card->dev = &pdev->dev;
227
228	ret = devm_snd_soc_register_card(&pdev->dev, card);
229	if (ret)
230		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
231
232	return ret;
233}
234
235static struct platform_driver tobermory_driver = {
236	.driver = {
237		.name = "tobermory",
238		.pm = &snd_soc_pm_ops,
239	},
240	.probe = tobermory_probe,
241};
242
243module_platform_driver(tobermory_driver);
244
245MODULE_DESCRIPTION("Tobermory audio support");
246MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
247MODULE_LICENSE("GPL");
248MODULE_ALIAS("platform:tobermory");