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/gpio.h>
11#include <linux/module.h>
12
13#include "../codecs/wm8962.h"
14
15static int sample_rate = 44100;
16
17static int tobermory_set_bias_level(struct snd_soc_card *card,
18					  struct snd_soc_dapm_context *dapm,
19					  enum snd_soc_bias_level level)
20{
21	struct snd_soc_pcm_runtime *rtd;
22	struct snd_soc_dai *codec_dai;
23	int ret;
24
25	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
26	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
27
28	if (dapm->dev != codec_dai->dev)
29		return 0;
30
31	switch (level) {
32	case SND_SOC_BIAS_PREPARE:
33		if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
34			ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
35						  WM8962_FLL_MCLK, 32768,
36						  sample_rate * 512);
37			if (ret < 0)
38				pr_err("Failed to start FLL: %d\n", ret);
39
40			ret = snd_soc_dai_set_sysclk(codec_dai,
41						     WM8962_SYSCLK_FLL,
42						     sample_rate * 512,
43						     SND_SOC_CLOCK_IN);
44			if (ret < 0) {
45				pr_err("Failed to set SYSCLK: %d\n", ret);
46				snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
47						    0, 0, 0);
48				return ret;
49			}
50		}
51		break;
52
53	default:
54		break;
55	}
56
57	return 0;
58}
59
60static int tobermory_set_bias_level_post(struct snd_soc_card *card,
61					       struct snd_soc_dapm_context *dapm,
62					       enum snd_soc_bias_level level)
63{
64	struct snd_soc_pcm_runtime *rtd;
65	struct snd_soc_dai *codec_dai;
66	int ret;
67
68	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
69	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
70
71	if (dapm->dev != codec_dai->dev)
72		return 0;
73
74	switch (level) {
75	case SND_SOC_BIAS_STANDBY:
76		ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
77					     32768, SND_SOC_CLOCK_IN);
78		if (ret < 0) {
79			pr_err("Failed to switch away from FLL: %d\n", ret);
80			return ret;
81		}
82
83		ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
84					  0, 0, 0);
85		if (ret < 0) {
86			pr_err("Failed to stop FLL: %d\n", ret);
87			return ret;
88		}
89		break;
90
91	default:
92		break;
93	}
94
95	dapm->bias_level = level;
96
97	return 0;
98}
99
100static int tobermory_hw_params(struct snd_pcm_substream *substream,
101			      struct snd_pcm_hw_params *params)
102{
103	sample_rate = params_rate(params);
104
105	return 0;
106}
107
108static const struct snd_soc_ops tobermory_ops = {
109	.hw_params = tobermory_hw_params,
110};
111
112SND_SOC_DAILINK_DEFS(cpu,
113	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
114	DAILINK_COMP_ARRAY(COMP_CODEC("wm8962.1-001a", "wm8962")),
115	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
116
117static struct snd_soc_dai_link tobermory_dai[] = {
118	{
119		.name = "CPU",
120		.stream_name = "CPU",
121		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
122				| SND_SOC_DAIFMT_CBM_CFM,
123		.ops = &tobermory_ops,
124		SND_SOC_DAILINK_REG(cpu),
125	},
126};
127
128static const struct snd_kcontrol_new controls[] = {
129	SOC_DAPM_PIN_SWITCH("Main Speaker"),
130	SOC_DAPM_PIN_SWITCH("DMIC"),
131};
132
133static const struct snd_soc_dapm_widget widgets[] = {
134	SND_SOC_DAPM_HP("Headphone", NULL),
135	SND_SOC_DAPM_MIC("Headset Mic", NULL),
136
137	SND_SOC_DAPM_MIC("DMIC", NULL),
138	SND_SOC_DAPM_MIC("AMIC", NULL),
139
140	SND_SOC_DAPM_SPK("Main Speaker", NULL),
141};
142
143static const struct snd_soc_dapm_route audio_paths[] = {
144	{ "Headphone", NULL, "HPOUTL" },
145	{ "Headphone", NULL, "HPOUTR" },
146
147	{ "Main Speaker", NULL, "SPKOUTL" },
148	{ "Main Speaker", NULL, "SPKOUTR" },
149
150	{ "Headset Mic", NULL, "MICBIAS" },
151	{ "IN4L", NULL, "Headset Mic" },
152	{ "IN4R", NULL, "Headset Mic" },
153
154	{ "AMIC", NULL, "MICBIAS" },
155	{ "IN1L", NULL, "AMIC" },
156	{ "IN1R", NULL, "AMIC" },
157
158	{ "DMIC", NULL, "MICBIAS" },
159	{ "DMICDAT", NULL, "DMIC" },
160};
161
162static struct snd_soc_jack tobermory_headset;
163
164/* Headset jack detection DAPM pins */
165static struct snd_soc_jack_pin tobermory_headset_pins[] = {
166	{
167		.pin = "Headset Mic",
168		.mask = SND_JACK_MICROPHONE,
169	},
170	{
171		.pin = "Headphone",
172		.mask = SND_JACK_MICROPHONE,
173	},
174};
175
176static int tobermory_late_probe(struct snd_soc_card *card)
177{
178	struct snd_soc_pcm_runtime *rtd;
179	struct snd_soc_component *component;
180	struct snd_soc_dai *codec_dai;
181	int ret;
182
183	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
184	component = snd_soc_rtd_to_codec(rtd, 0)->component;
185	codec_dai = snd_soc_rtd_to_codec(rtd, 0);
186
187	ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
188				     32768, SND_SOC_CLOCK_IN);
189	if (ret < 0)
190		return ret;
191
192	ret = snd_soc_card_jack_new_pins(card, "Headset", SND_JACK_HEADSET |
193					 SND_JACK_BTN_0, &tobermory_headset,
194					 tobermory_headset_pins,
195					 ARRAY_SIZE(tobermory_headset_pins));
196	if (ret)
197		return ret;
198
199	wm8962_mic_detect(component, &tobermory_headset);
200
201	return 0;
202}
203
204static struct snd_soc_card tobermory = {
205	.name = "Tobermory",
206	.owner = THIS_MODULE,
207	.dai_link = tobermory_dai,
208	.num_links = ARRAY_SIZE(tobermory_dai),
209
210	.set_bias_level = tobermory_set_bias_level,
211	.set_bias_level_post = tobermory_set_bias_level_post,
212
213	.controls = controls,
214	.num_controls = ARRAY_SIZE(controls),
215	.dapm_widgets = widgets,
216	.num_dapm_widgets = ARRAY_SIZE(widgets),
217	.dapm_routes = audio_paths,
218	.num_dapm_routes = ARRAY_SIZE(audio_paths),
219	.fully_routed = true,
220
221	.late_probe = tobermory_late_probe,
222};
223
224static int tobermory_probe(struct platform_device *pdev)
225{
226	struct snd_soc_card *card = &tobermory;
227	int ret;
228
229	card->dev = &pdev->dev;
230
231	ret = devm_snd_soc_register_card(&pdev->dev, card);
232	if (ret)
233		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
234
235	return ret;
236}
237
238static struct platform_driver tobermory_driver = {
239	.driver = {
240		.name = "tobermory",
241		.pm = &snd_soc_pm_ops,
242	},
243	.probe = tobermory_probe,
244};
245
246module_platform_driver(tobermory_driver);
247
248MODULE_DESCRIPTION("Tobermory audio support");
249MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
250MODULE_LICENSE("GPL");
251MODULE_ALIAS("platform:tobermory");
252