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1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
4 //
5 // Based on smdk6410_wm8987.c
6 //     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
7 //     Graeme Gregory - graeme.gregory@wolfsonmicro.com
8 
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 
12 #include <sound/soc.h>
13 #include <sound/jack.h>
14 
15 #include "i2s.h"
16 #include "../codecs/wm8750.h"
17 
18 /*
19  * WM8987 is register compatible with WM8750, so using that as base driver.
20  */
21 
22 static struct snd_soc_card snd_soc_smartq;
23 
smartq_hifi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)24 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
25 	struct snd_pcm_hw_params *params)
26 {
27 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
28 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
29 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
30 	unsigned int clk = 0;
31 	int ret;
32 
33 	switch (params_rate(params)) {
34 	case 8000:
35 	case 16000:
36 	case 32000:
37 	case 48000:
38 	case 96000:
39 		clk = 12288000;
40 		break;
41 	case 11025:
42 	case 22050:
43 	case 44100:
44 	case 88200:
45 		clk = 11289600;
46 		break;
47 	}
48 
49 	/* Use PCLK for I2S signal generation */
50 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
51 					0, SND_SOC_CLOCK_IN);
52 	if (ret < 0)
53 		return ret;
54 
55 	/* Gate the RCLK output on PAD */
56 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
57 					0, SND_SOC_CLOCK_IN);
58 	if (ret < 0)
59 		return ret;
60 
61 	/* set the codec system clock for DAC and ADC */
62 	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
63 				     SND_SOC_CLOCK_IN);
64 	if (ret < 0)
65 		return ret;
66 
67 	return 0;
68 }
69 
70 /*
71  * SmartQ WM8987 HiFi DAI operations.
72  */
73 static struct snd_soc_ops smartq_hifi_ops = {
74 	.hw_params = smartq_hifi_hw_params,
75 };
76 
77 static struct snd_soc_jack smartq_jack;
78 
79 static struct snd_soc_jack_pin smartq_jack_pins[] = {
80 	/* Disable speaker when headphone is plugged in */
81 	{
82 		.pin	= "Internal Speaker",
83 		.mask	= SND_JACK_HEADPHONE,
84 	},
85 };
86 
87 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
88 	{
89 		.gpio		= -1,
90 		.name		= "headphone detect",
91 		.report		= SND_JACK_HEADPHONE,
92 		.debounce_time	= 200,
93 	},
94 };
95 
96 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
97 	SOC_DAPM_PIN_SWITCH("Internal Speaker"),
98 	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
99 	SOC_DAPM_PIN_SWITCH("Internal Mic"),
100 };
101 
smartq_speaker_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)102 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
103 				struct snd_kcontrol *k,
104 				int event)
105 {
106 	struct gpio_desc *gpio = snd_soc_card_get_drvdata(&snd_soc_smartq);
107 
108 	gpiod_set_value(gpio, SND_SOC_DAPM_EVENT_OFF(event));
109 
110 	return 0;
111 }
112 
113 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
114 	SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
115 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
116 	SND_SOC_DAPM_MIC("Internal Mic", NULL),
117 };
118 
119 static const struct snd_soc_dapm_route audio_map[] = {
120 	{"Headphone Jack", NULL, "LOUT2"},
121 	{"Headphone Jack", NULL, "ROUT2"},
122 
123 	{"Internal Speaker", NULL, "LOUT2"},
124 	{"Internal Speaker", NULL, "ROUT2"},
125 
126 	{"Mic Bias", NULL, "Internal Mic"},
127 	{"LINPUT2", NULL, "Mic Bias"},
128 };
129 
smartq_wm8987_init(struct snd_soc_pcm_runtime * rtd)130 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
131 {
132 	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
133 	int err = 0;
134 
135 	/* set endpoints to not connected */
136 	snd_soc_dapm_nc_pin(dapm, "LINPUT1");
137 	snd_soc_dapm_nc_pin(dapm, "RINPUT1");
138 	snd_soc_dapm_nc_pin(dapm, "OUT3");
139 	snd_soc_dapm_nc_pin(dapm, "ROUT1");
140 
141 	/* Headphone jack detection */
142 	err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
143 				    SND_JACK_HEADPHONE, &smartq_jack,
144 				    smartq_jack_pins,
145 				    ARRAY_SIZE(smartq_jack_pins));
146 	if (err)
147 		return err;
148 
149 	err = snd_soc_jack_add_gpios(&smartq_jack,
150 				     ARRAY_SIZE(smartq_jack_gpios),
151 				     smartq_jack_gpios);
152 
153 	return err;
154 }
155 
156 SND_SOC_DAILINK_DEFS(wm8987,
157 	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
158 	DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-0x1a", "wm8750-hifi")),
159 	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
160 
161 static struct snd_soc_dai_link smartq_dai[] = {
162 	{
163 		.name		= "wm8987",
164 		.stream_name	= "SmartQ Hi-Fi",
165 		.init		= smartq_wm8987_init,
166 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
167 				  SND_SOC_DAIFMT_CBS_CFS,
168 		.ops		= &smartq_hifi_ops,
169 		SND_SOC_DAILINK_REG(wm8987),
170 	},
171 };
172 
173 static struct snd_soc_card snd_soc_smartq = {
174 	.name = "SmartQ",
175 	.owner = THIS_MODULE,
176 	.dai_link = smartq_dai,
177 	.num_links = ARRAY_SIZE(smartq_dai),
178 
179 	.dapm_widgets = wm8987_dapm_widgets,
180 	.num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
181 	.dapm_routes = audio_map,
182 	.num_dapm_routes = ARRAY_SIZE(audio_map),
183 	.controls = wm8987_smartq_controls,
184 	.num_controls = ARRAY_SIZE(wm8987_smartq_controls),
185 };
186 
smartq_probe(struct platform_device * pdev)187 static int smartq_probe(struct platform_device *pdev)
188 {
189 	struct gpio_desc *gpio;
190 	int ret;
191 
192 	platform_set_drvdata(pdev, &snd_soc_smartq);
193 
194 	/* Initialise GPIOs used by amplifiers */
195 	gpio = devm_gpiod_get(&pdev->dev, "amplifiers shutdown",
196 			      GPIOD_OUT_HIGH);
197 	if (IS_ERR(gpio)) {
198 		dev_err(&pdev->dev, "Failed to register GPK12\n");
199 		ret = PTR_ERR(gpio);
200 		goto out;
201 	}
202 	snd_soc_card_set_drvdata(&snd_soc_smartq, gpio);
203 
204 	ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_smartq);
205 	if (ret)
206 		dev_err(&pdev->dev, "Failed to register card\n");
207 
208 out:
209 	return ret;
210 }
211 
212 static struct platform_driver smartq_driver = {
213 	.driver = {
214 		.name = "smartq-audio",
215 	},
216 	.probe = smartq_probe,
217 };
218 
219 module_platform_driver(smartq_driver);
220 
221 /* Module information */
222 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
223 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
224 MODULE_LICENSE("GPL");
225