1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // h1940_uda1380.c - ALSA SoC Audio Layer
4 //
5 // Copyright (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
6 // Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
7 //
8 // Based on version from Arnaud Patard <arnaud.patard@rtp-net.org>
9
10 #include <linux/types.h>
11 #include <linux/gpio.h>
12 #include <linux/module.h>
13
14 #include <sound/soc.h>
15 #include <sound/jack.h>
16
17 #include "regs-iis.h"
18 #include <asm/mach-types.h>
19
20 #include <mach/gpio-samsung.h>
21 #include "s3c24xx-i2s.h"
22
23 static const unsigned int rates[] = {
24 11025,
25 22050,
26 44100,
27 };
28
29 static const struct snd_pcm_hw_constraint_list hw_rates = {
30 .count = ARRAY_SIZE(rates),
31 .list = rates,
32 };
33
34 static struct snd_soc_jack hp_jack;
35
36 static struct snd_soc_jack_pin hp_jack_pins[] = {
37 {
38 .pin = "Headphone Jack",
39 .mask = SND_JACK_HEADPHONE,
40 },
41 {
42 .pin = "Speaker",
43 .mask = SND_JACK_HEADPHONE,
44 .invert = 1,
45 },
46 };
47
48 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
49 {
50 .gpio = S3C2410_GPG(4),
51 .name = "hp-gpio",
52 .report = SND_JACK_HEADPHONE,
53 .invert = 1,
54 .debounce_time = 200,
55 },
56 };
57
h1940_startup(struct snd_pcm_substream * substream)58 static int h1940_startup(struct snd_pcm_substream *substream)
59 {
60 struct snd_pcm_runtime *runtime = substream->runtime;
61
62 return snd_pcm_hw_constraint_list(runtime, 0,
63 SNDRV_PCM_HW_PARAM_RATE,
64 &hw_rates);
65 }
66
h1940_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)67 static int h1940_hw_params(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params *params)
69 {
70 struct snd_soc_pcm_runtime *rtd = substream->private_data;
71 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
72 int div;
73 int ret;
74 unsigned int rate = params_rate(params);
75
76 switch (rate) {
77 case 11025:
78 case 22050:
79 case 44100:
80 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
81 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
82 div++;
83 break;
84 default:
85 dev_err(rtd->dev, "%s: rate %d is not supported\n",
86 __func__, rate);
87 return -EINVAL;
88 }
89
90 /* select clock source */
91 ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
92 SND_SOC_CLOCK_OUT);
93 if (ret < 0)
94 return ret;
95
96 /* set MCLK division for sample rate */
97 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
98 S3C2410_IISMOD_384FS);
99 if (ret < 0)
100 return ret;
101
102 /* set BCLK division for sample rate */
103 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
104 S3C2410_IISMOD_32FS);
105 if (ret < 0)
106 return ret;
107
108 /* set prescaler division for sample rate */
109 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
110 S3C24XX_PRESCALE(div, div));
111 if (ret < 0)
112 return ret;
113
114 return 0;
115 }
116
117 static struct snd_soc_ops h1940_ops = {
118 .startup = h1940_startup,
119 .hw_params = h1940_hw_params,
120 };
121
h1940_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)122 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
123 struct snd_kcontrol *kcontrol, int event)
124 {
125 if (SND_SOC_DAPM_EVENT_ON(event))
126 gpio_set_value(S3C_GPIO_END + 9, 1);
127 else
128 gpio_set_value(S3C_GPIO_END + 9, 0);
129
130 return 0;
131 }
132
133 /* h1940 machine dapm widgets */
134 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
135 SND_SOC_DAPM_HP("Headphone Jack", NULL),
136 SND_SOC_DAPM_MIC("Mic Jack", NULL),
137 SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
138 };
139
140 /* h1940 machine audio_map */
141 static const struct snd_soc_dapm_route audio_map[] = {
142 /* headphone connected to VOUTLHP, VOUTRHP */
143 {"Headphone Jack", NULL, "VOUTLHP"},
144 {"Headphone Jack", NULL, "VOUTRHP"},
145
146 /* ext speaker connected to VOUTL, VOUTR */
147 {"Speaker", NULL, "VOUTL"},
148 {"Speaker", NULL, "VOUTR"},
149
150 /* mic is connected to VINM */
151 {"VINM", NULL, "Mic Jack"},
152 };
153
154 static struct platform_device *s3c24xx_snd_device;
155
h1940_uda1380_init(struct snd_soc_pcm_runtime * rtd)156 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
157 {
158 snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
159 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
160
161 snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
162 hp_jack_gpios);
163
164 return 0;
165 }
166
167 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
168 SND_SOC_DAILINK_DEFS(uda1380,
169 DAILINK_COMP_ARRAY(COMP_CPU("s3c24xx-iis")),
170 DAILINK_COMP_ARRAY(COMP_CODEC("uda1380-codec.0-001a", "uda1380-hifi")),
171 DAILINK_COMP_ARRAY(COMP_PLATFORM("s3c24xx-iis")));
172
173 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
174 {
175 .name = "uda1380",
176 .stream_name = "UDA1380 Duplex",
177 .init = h1940_uda1380_init,
178 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
179 SND_SOC_DAIFMT_CBS_CFS,
180 .ops = &h1940_ops,
181 SND_SOC_DAILINK_REG(uda1380),
182 },
183 };
184
185 static struct snd_soc_card h1940_asoc = {
186 .name = "h1940",
187 .owner = THIS_MODULE,
188 .dai_link = h1940_uda1380_dai,
189 .num_links = ARRAY_SIZE(h1940_uda1380_dai),
190
191 .dapm_widgets = uda1380_dapm_widgets,
192 .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
193 .dapm_routes = audio_map,
194 .num_dapm_routes = ARRAY_SIZE(audio_map),
195 };
196
h1940_init(void)197 static int __init h1940_init(void)
198 {
199 int ret;
200
201 if (!machine_is_h1940())
202 return -ENODEV;
203
204 /* configure some gpios */
205 ret = gpio_request(S3C_GPIO_END + 9, "speaker-power");
206 if (ret)
207 goto err_out;
208
209 ret = gpio_direction_output(S3C_GPIO_END + 9, 0);
210 if (ret)
211 goto err_gpio;
212
213 s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
214 if (!s3c24xx_snd_device) {
215 ret = -ENOMEM;
216 goto err_gpio;
217 }
218
219 platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
220 ret = platform_device_add(s3c24xx_snd_device);
221
222 if (ret)
223 goto err_plat;
224
225 return 0;
226
227 err_plat:
228 platform_device_put(s3c24xx_snd_device);
229 err_gpio:
230 gpio_free(S3C_GPIO_END + 9);
231
232 err_out:
233 return ret;
234 }
235
h1940_exit(void)236 static void __exit h1940_exit(void)
237 {
238 platform_device_unregister(s3c24xx_snd_device);
239 gpio_free(S3C_GPIO_END + 9);
240 }
241
242 module_init(h1940_init);
243 module_exit(h1940_exit);
244
245 /* Module information */
246 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
247 MODULE_DESCRIPTION("ALSA SoC H1940");
248 MODULE_LICENSE("GPL");
249