sound/soc/samsung/h1940_uda1380.c

   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 "s3c24xx-i2s.h"
  19
  20 static const unsigned int rates[] = {
  21         11025,
  22         22050,
  23         44100,
  24 };
  25
  26 static const struct snd_pcm_hw_constraint_list hw_rates = {
  27         .count = ARRAY_SIZE(rates),
  28         .list = rates,
  29 };
  30
  31 static struct gpio_desc *gpiod_speaker_power;
  32
  33 static struct snd_soc_jack hp_jack;
  34
  35 static struct snd_soc_jack_pin hp_jack_pins[] = {
  36         {
  37                 .pin    = "Headphone Jack",
  38                 .mask   = SND_JACK_HEADPHONE,
  39         },
  40         {
  41                 .pin    = "Speaker",
  42                 .mask   = SND_JACK_HEADPHONE,
  43                 .invert = 1,
  44         },
  45 };
  46
  47 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  48         {
  49                 .name                   = "hp-gpio",
  50                 .report                 = SND_JACK_HEADPHONE,
  51                 .invert                 = 1,
  52                 .debounce_time          = 200,
  53         },
  54 };
  55
  56 static int h1940_startup(struct snd_pcm_substream *substream)
  57 {
  58         struct snd_pcm_runtime *runtime = substream->runtime;
  59
  60         return snd_pcm_hw_constraint_list(runtime, 0,
  61                                         SNDRV_PCM_HW_PARAM_RATE,
  62                                         &hw_rates);
  63 }
  64
  65 static int h1940_hw_params(struct snd_pcm_substream *substream,
  66                                 struct snd_pcm_hw_params *params)
  67 {
  68         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  69         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  70         int div;
  71         int ret;
  72         unsigned int rate = params_rate(params);
  73
  74         switch (rate) {
  75         case 11025:
  76         case 22050:
  77         case 44100:
  78                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
  79                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
  80                         div++;
  81                 break;
  82         default:
  83                 dev_err(rtd->dev, "%s: rate %d is not supported\n",
  84                         __func__, rate);
  85                 return -EINVAL;
  86         }
  87
  88         /* select clock source */
  89         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
  90                         SND_SOC_CLOCK_OUT);
  91         if (ret < 0)
  92                 return ret;
  93
  94         /* set MCLK division for sample rate */
  95         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
  96                 S3C2410_IISMOD_384FS);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /* set BCLK division for sample rate */
 101         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 102                 S3C2410_IISMOD_32FS);
 103         if (ret < 0)
 104                 return ret;
 105
 106         /* set prescaler division for sample rate */
 107         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 108                 S3C24XX_PRESCALE(div, div));
 109         if (ret < 0)
 110                 return ret;
 111
 112         return 0;
 113 }
 114
 115 static struct snd_soc_ops h1940_ops = {
 116         .startup        = h1940_startup,
 117         .hw_params      = h1940_hw_params,
 118 };
 119
 120 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
 121                                 struct snd_kcontrol *kcontrol, int event)
 122 {
 123         if (SND_SOC_DAPM_EVENT_ON(event))
 124                 gpiod_set_value(gpiod_speaker_power, 1);
 125         else
 126                 gpiod_set_value(gpiod_speaker_power, 0);
 127
 128         return 0;
 129 }
 130
 131 /* h1940 machine dapm widgets */
 132 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 133         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 134         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 135         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
 136 };
 137
 138 /* h1940 machine audio_map */
 139 static const struct snd_soc_dapm_route audio_map[] = {
 140         /* headphone connected to VOUTLHP, VOUTRHP */
 141         {"Headphone Jack", NULL, "VOUTLHP"},
 142         {"Headphone Jack", NULL, "VOUTRHP"},
 143
 144         /* ext speaker connected to VOUTL, VOUTR  */
 145         {"Speaker", NULL, "VOUTL"},
 146         {"Speaker", NULL, "VOUTR"},
 147
 148         /* mic is connected to VINM */
 149         {"VINM", NULL, "Mic Jack"},
 150 };
 151
 152 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 153 {
 154         snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
 155                 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
 156
 157         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 158                 hp_jack_gpios);
 159
 160         return 0;
 161 }
 162
 163 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
 164 SND_SOC_DAILINK_DEFS(uda1380,
 165         DAILINK_COMP_ARRAY(COMP_CPU("s3c24xx-iis")),
 166         DAILINK_COMP_ARRAY(COMP_CODEC("uda1380-codec.0-001a", "uda1380-hifi")),
 167         DAILINK_COMP_ARRAY(COMP_PLATFORM("s3c24xx-iis")));
 168
 169 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
 170         {
 171                 .name           = "uda1380",
 172                 .stream_name    = "UDA1380 Duplex",
 173                 .init           = h1940_uda1380_init,
 174                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 175                                   SND_SOC_DAIFMT_CBS_CFS,
 176                 .ops            = &h1940_ops,
 177                 SND_SOC_DAILINK_REG(uda1380),
 178         },
 179 };
 180
 181 static struct snd_soc_card h1940_asoc = {
 182         .name = "h1940",
 183         .owner = THIS_MODULE,
 184         .dai_link = h1940_uda1380_dai,
 185         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
 186
 187         .dapm_widgets = uda1380_dapm_widgets,
 188         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
 189         .dapm_routes = audio_map,
 190         .num_dapm_routes = ARRAY_SIZE(audio_map),
 191 };
 192
 193 static int h1940_probe(struct platform_device *pdev)
 194 {
 195         struct device *dev = &pdev->dev;
 196
 197         h1940_asoc.dev = dev;
 198         hp_jack_gpios[0].gpiod_dev = dev;
 199         gpiod_speaker_power = devm_gpiod_get(&pdev->dev, "speaker-power",
 200                                              GPIOD_OUT_LOW);
 201
 202         if (IS_ERR(gpiod_speaker_power)) {
 203                 dev_err(dev, "Could not get gpio\n");
 204                 return PTR_ERR(gpiod_speaker_power);
 205         }
 206
 207         return devm_snd_soc_register_card(dev, &h1940_asoc);
 208 }
 209
 210 static struct platform_driver h1940_audio_driver = {
 211         .driver = {
 212                 .name = "h1940-audio",
 213                 .pm = &snd_soc_pm_ops,
 214         },
 215         .probe = h1940_probe,
 216 };
 217 module_platform_driver(h1940_audio_driver);
 218
 219 /* Module information */
 220 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
 221 MODULE_DESCRIPTION("ALSA SoC H1940");
 222 MODULE_LICENSE("GPL");
 223 MODULE_ALIAS("platform:h1940-audio");