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
22static struct snd_soc_card snd_soc_smartq;
23
24static 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 */
73static struct snd_soc_ops smartq_hifi_ops = {
74	.hw_params = smartq_hifi_hw_params,
75};
76
77static struct snd_soc_jack smartq_jack;
78
79static 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
87static 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
96static 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
102static 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
113static 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
119static 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
130static 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
156SND_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
161static 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
173static 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
187static 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
208out:
209	return ret;
210}
211
212static struct platform_driver smartq_driver = {
213	.driver = {
214		.name = "smartq-audio",
215	},
216	.probe = smartq_probe,
217};
218
219module_platform_driver(smartq_driver);
220
221/* Module information */
222MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
223MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
224MODULE_LICENSE("GPL");
225