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 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 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