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1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // rx1950.c - ALSA SoC Audio Layer
4 //
5 // Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
6 //
7 // Based on smdk2440.c and magician.c
8 //
9 // Authors: Graeme Gregory graeme.gregory@wolfsonmicro.com
10 //          Philipp Zabel <philipp.zabel@gmail.com>
11 //          Denis Grigoriev <dgreenday@gmail.com>
12 //          Vasily Khoruzhick <anarsoul@gmail.com>
13 
14 #include <linux/types.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/module.h>
17 
18 #include <sound/soc.h>
19 #include <sound/jack.h>
20 
21 #include "regs-iis.h"
22 #include "s3c24xx-i2s.h"
23 
24 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
25 static int rx1950_startup(struct snd_pcm_substream *substream);
26 static int rx1950_hw_params(struct snd_pcm_substream *substream,
27 				struct snd_pcm_hw_params *params);
28 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
29 				struct snd_kcontrol *kcontrol, int event);
30 
31 static const unsigned int rates[] = {
32 	16000,
33 	44100,
34 	48000,
35 };
36 
37 static const struct snd_pcm_hw_constraint_list hw_rates = {
38 	.count = ARRAY_SIZE(rates),
39 	.list = rates,
40 };
41 
42 static struct snd_soc_jack hp_jack;
43 
44 static struct snd_soc_jack_pin hp_jack_pins[] = {
45 	{
46 		.pin	= "Headphone Jack",
47 		.mask	= SND_JACK_HEADPHONE,
48 	},
49 	{
50 		.pin	= "Speaker",
51 		.mask	= SND_JACK_HEADPHONE,
52 		.invert	= 1,
53 	},
54 };
55 
56 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
57 	[0] = {
58 		.name			= "hp-gpio",
59 		.report			= SND_JACK_HEADPHONE,
60 		.invert			= 1,
61 		.debounce_time		= 200,
62 	},
63 };
64 
65 static const struct snd_soc_ops rx1950_ops = {
66 	.startup	= rx1950_startup,
67 	.hw_params	= rx1950_hw_params,
68 };
69 
70 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
71 SND_SOC_DAILINK_DEFS(uda1380,
72 	DAILINK_COMP_ARRAY(COMP_CPU("s3c24xx-iis")),
73 	DAILINK_COMP_ARRAY(COMP_CODEC("uda1380-codec.0-001a",
74 				      "uda1380-hifi")),
75 	DAILINK_COMP_ARRAY(COMP_PLATFORM("s3c24xx-iis")));
76 
77 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
78 	{
79 		.name		= "uda1380",
80 		.stream_name	= "UDA1380 Duplex",
81 		.init		= rx1950_uda1380_init,
82 		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
83 				  SND_SOC_DAIFMT_CBS_CFS,
84 		.ops		= &rx1950_ops,
85 		SND_SOC_DAILINK_REG(uda1380),
86 	},
87 };
88 
89 /* rx1950 machine dapm widgets */
90 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
91 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
92 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
93 	SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
94 };
95 
96 /* rx1950 machine audio_map */
97 static const struct snd_soc_dapm_route audio_map[] = {
98 	/* headphone connected to VOUTLHP, VOUTRHP */
99 	{"Headphone Jack", NULL, "VOUTLHP"},
100 	{"Headphone Jack", NULL, "VOUTRHP"},
101 
102 	/* ext speaker connected to VOUTL, VOUTR  */
103 	{"Speaker", NULL, "VOUTL"},
104 	{"Speaker", NULL, "VOUTR"},
105 
106 	/* mic is connected to VINM */
107 	{"VINM", NULL, "Mic Jack"},
108 };
109 
110 static struct snd_soc_card rx1950_asoc = {
111 	.name = "rx1950",
112 	.owner = THIS_MODULE,
113 	.dai_link = rx1950_uda1380_dai,
114 	.num_links = ARRAY_SIZE(rx1950_uda1380_dai),
115 
116 	.dapm_widgets = uda1380_dapm_widgets,
117 	.num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
118 	.dapm_routes = audio_map,
119 	.num_dapm_routes = ARRAY_SIZE(audio_map),
120 };
121 
rx1950_startup(struct snd_pcm_substream * substream)122 static int rx1950_startup(struct snd_pcm_substream *substream)
123 {
124 	struct snd_pcm_runtime *runtime = substream->runtime;
125 
126 	return snd_pcm_hw_constraint_list(runtime, 0,
127 					SNDRV_PCM_HW_PARAM_RATE,
128 					&hw_rates);
129 }
130 
131 static struct gpio_desc *gpiod_speaker_power;
132 
rx1950_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)133 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
134 				struct snd_kcontrol *kcontrol, int event)
135 {
136 	if (SND_SOC_DAPM_EVENT_ON(event))
137 		gpiod_set_value(gpiod_speaker_power, 1);
138 	else
139 		gpiod_set_value(gpiod_speaker_power, 0);
140 
141 	return 0;
142 }
143 
rx1950_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)144 static int rx1950_hw_params(struct snd_pcm_substream *substream,
145 				struct snd_pcm_hw_params *params)
146 {
147 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
148 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
149 	int div;
150 	int ret;
151 	unsigned int rate = params_rate(params);
152 	int clk_source, fs_mode;
153 
154 	switch (rate) {
155 	case 16000:
156 	case 48000:
157 		clk_source = S3C24XX_CLKSRC_PCLK;
158 		fs_mode = S3C2410_IISMOD_256FS;
159 		div = s3c24xx_i2s_get_clockrate() / (256 * rate);
160 		if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
161 			div++;
162 		break;
163 	case 44100:
164 	case 88200:
165 		clk_source = S3C24XX_CLKSRC_MPLL;
166 		fs_mode = S3C2410_IISMOD_384FS;
167 		div = 1;
168 		break;
169 	default:
170 		printk(KERN_ERR "%s: rate %d is not supported\n",
171 			__func__, rate);
172 		return -EINVAL;
173 	}
174 
175 	/* select clock source */
176 	ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
177 			SND_SOC_CLOCK_OUT);
178 	if (ret < 0)
179 		return ret;
180 
181 	/* set MCLK division for sample rate */
182 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
183 		fs_mode);
184 	if (ret < 0)
185 		return ret;
186 
187 	/* set BCLK division for sample rate */
188 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
189 		S3C2410_IISMOD_32FS);
190 	if (ret < 0)
191 		return ret;
192 
193 	/* set prescaler division for sample rate */
194 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
195 		S3C24XX_PRESCALE(div, div));
196 	if (ret < 0)
197 		return ret;
198 
199 	return 0;
200 }
201 
rx1950_uda1380_init(struct snd_soc_pcm_runtime * rtd)202 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
203 {
204 	snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
205 		&hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
206 
207 	snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
208 		hp_jack_gpios);
209 
210 	return 0;
211 }
212 
rx1950_probe(struct platform_device * pdev)213 static int rx1950_probe(struct platform_device *pdev)
214 {
215 	struct device *dev = &pdev->dev;
216 
217 	/* configure some gpios */
218 	gpiod_speaker_power = devm_gpiod_get(dev, "speaker-power", GPIOD_OUT_LOW);
219 	if (IS_ERR(gpiod_speaker_power)) {
220 		dev_err(dev, "cannot get gpio\n");
221 		return PTR_ERR(gpiod_speaker_power);
222 	}
223 
224 	hp_jack_gpios[0].gpiod_dev = dev;
225 	rx1950_asoc.dev = dev;
226 
227 	return devm_snd_soc_register_card(dev, &rx1950_asoc);
228 }
229 
230 static struct platform_driver rx1950_audio = {
231 	.driver = {
232 		.name = "rx1950-audio",
233 		.pm = &snd_soc_pm_ops,
234 	},
235 	.probe = rx1950_probe,
236 };
237 
238 module_platform_driver(rx1950_audio);
239 
240 /* Module information */
241 MODULE_AUTHOR("Vasily Khoruzhick");
242 MODULE_DESCRIPTION("ALSA SoC RX1950");
243 MODULE_LICENSE("GPL");
244 MODULE_ALIAS("platform:rx1950-audio");
245