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 
15 static int sample_rate = 44100;
16 
tobermory_set_bias_level(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)17 static 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 = asoc_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 
tobermory_set_bias_level_post(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)60 static 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 = asoc_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 
tobermory_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)100 static 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 
108 static const struct snd_soc_ops tobermory_ops = {
109 	.hw_params = tobermory_hw_params,
110 };
111 
112 SND_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 
117 static 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 
128 static const struct snd_kcontrol_new controls[] = {
129 	SOC_DAPM_PIN_SWITCH("Main Speaker"),
130 	SOC_DAPM_PIN_SWITCH("DMIC"),
131 };
132 
133 static 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 
143 static 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 
162 static struct snd_soc_jack tobermory_headset;
163 
164 /* Headset jack detection DAPM pins */
165 static 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 
tobermory_late_probe(struct snd_soc_card * card)176 static 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 = asoc_rtd_to_codec(rtd, 0)->component;
185 	codec_dai = asoc_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 
204 static 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 
tobermory_probe(struct platform_device * pdev)224 static 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 
238 static struct platform_driver tobermory_driver = {
239 	.driver = {
240 		.name = "tobermory",
241 		.pm = &snd_soc_pm_ops,
242 	},
243 	.probe = tobermory_probe,
244 };
245 
246 module_platform_driver(tobermory_driver);
247 
248 MODULE_DESCRIPTION("Tobermory audio support");
249 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
250 MODULE_LICENSE("GPL");
251 MODULE_ALIAS("platform:tobermory");
252