sound/soc/ti/omap3pandora.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * omap3pandora.c  --  SoC audio for Pandora Handheld Console
   4  *
   5  * Author: Gražvydas Ignotas <notasas@gmail.com>
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/delay.h>
  12 #include <linux/regulator/consumer.h>
  13 #include <linux/module.h>
  14
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/soc.h>
  18
  19 #include <asm/mach-types.h>
  20 #include <linux/platform_data/asoc-ti-mcbsp.h>
  21
  22 #include "omap-mcbsp.h"
  23
  24 #define PREFIX "ASoC omap3pandora: "
  25
  26 static struct regulator *omap3pandora_dac_reg;
  27 static struct gpio_desc *dac_power_gpio;
  28 static struct gpio_desc *amp_power_gpio;
  29
  30 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
  31         struct snd_pcm_hw_params *params)
  32 {
  33         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  34         struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
  35         struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  36         int ret;
  37
  38         /* Set the codec system clock for DAC and ADC */
  39         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  40                                             SND_SOC_CLOCK_IN);
  41         if (ret < 0) {
  42                 pr_err(PREFIX "can't set codec system clock\n");
  43                 return ret;
  44         }
  45
  46         /* Set McBSP clock to external */
  47         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  48                                      256 * params_rate(params),
  49                                      SND_SOC_CLOCK_IN);
  50         if (ret < 0) {
  51                 pr_err(PREFIX "can't set cpu system clock\n");
  52                 return ret;
  53         }
  54
  55         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  56         if (ret < 0) {
  57                 pr_err(PREFIX "can't set SRG clock divider\n");
  58                 return ret;
  59         }
  60
  61         return 0;
  62 }
  63
  64 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  65         struct snd_kcontrol *k, int event)
  66 {
  67         int ret;
  68
  69         /*
  70          * The PCM1773 DAC datasheet requires 1ms delay between switching
  71          * VCC power on/off and /PD pin high/low
  72          */
  73         if (SND_SOC_DAPM_EVENT_ON(event)) {
  74                 ret = regulator_enable(omap3pandora_dac_reg);
  75                 if (ret) {
  76                         dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
  77                         return ret;
  78                 }
  79                 mdelay(1);
  80                 gpiod_set_value(dac_power_gpio, 1);
  81         } else {
  82                 gpiod_set_value(dac_power_gpio, 0);
  83                 mdelay(1);
  84                 regulator_disable(omap3pandora_dac_reg);
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
  91         struct snd_kcontrol *k, int event)
  92 {
  93         if (SND_SOC_DAPM_EVENT_ON(event))
  94                 gpiod_set_value(amp_power_gpio, 1);
  95         else
  96                 gpiod_set_value(amp_power_gpio, 0);
  97
  98         return 0;
  99 }
 100
 101 /*
 102  * Audio paths on Pandora board:
 103  *
 104  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 105  *  |M|         A    +--------> Line Out
 106  *  |A| <~~clk~~+
 107  *  |P| <--- TWL4030 <--------- Line In and MICs
 108  */
 109 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
 110         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 111                            0, 0, omap3pandora_dac_event,
 112                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 113         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 114                            0, 0, NULL, 0, omap3pandora_hp_event,
 115                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 116         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 117         SND_SOC_DAPM_LINE("Line Out", NULL),
 118
 119         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 120         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 121         SND_SOC_DAPM_LINE("Line In", NULL),
 122 };
 123
 124 static const struct snd_soc_dapm_route omap3pandora_map[] = {
 125         {"PCM DAC", NULL, "APLL Enable"},
 126         {"Headphone Amplifier", NULL, "PCM DAC"},
 127         {"Line Out", NULL, "PCM DAC"},
 128         {"Headphone Jack", NULL, "Headphone Amplifier"},
 129
 130         {"AUXL", NULL, "Line In"},
 131         {"AUXR", NULL, "Line In"},
 132
 133         {"MAINMIC", NULL, "Mic (internal)"},
 134         {"Mic (internal)", NULL, "Mic Bias 1"},
 135
 136         {"SUBMIC", NULL, "Mic (external)"},
 137         {"Mic (external)", NULL, "Mic Bias 2"},
 138 };
 139
 140 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 141 {
 142         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
 143
 144         /* All TWL4030 output pins are floating */
 145         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 146         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 147         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 148         snd_soc_dapm_nc_pin(dapm, "HSOL");
 149         snd_soc_dapm_nc_pin(dapm, "HSOR");
 150         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 151         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 152         snd_soc_dapm_nc_pin(dapm, "HFL");
 153         snd_soc_dapm_nc_pin(dapm, "HFR");
 154         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 155
 156         return 0;
 157 }
 158
 159 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 160 {
 161         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
 162
 163         /* Not comnnected */
 164         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 165         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 166         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 167         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 168
 169         return 0;
 170 }
 171
 172 static const struct snd_soc_ops omap3pandora_ops = {
 173         .hw_params = omap3pandora_hw_params,
 174 };
 175
 176 /* Digital audio interface glue - connects codec <--> CPU */
 177 SND_SOC_DAILINK_DEFS(out,
 178         DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
 179         DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
 180         DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
 181
 182 SND_SOC_DAILINK_DEFS(in,
 183         DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
 184         DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
 185         DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
 186
 187 static struct snd_soc_dai_link omap3pandora_dai[] = {
 188         {
 189                 .name = "PCM1773",
 190                 .stream_name = "HiFi Out",
 191                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 192                            SND_SOC_DAIFMT_CBS_CFS,
 193                 .ops = &omap3pandora_ops,
 194                 .init = omap3pandora_out_init,
 195                 SND_SOC_DAILINK_REG(out),
 196         }, {
 197                 .name = "TWL4030",
 198                 .stream_name = "Line/Mic In",
 199                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 200                            SND_SOC_DAIFMT_CBS_CFS,
 201                 .ops = &omap3pandora_ops,
 202                 .init = omap3pandora_in_init,
 203                 SND_SOC_DAILINK_REG(in),
 204         }
 205 };
 206
 207 /* SoC card */
 208 static struct snd_soc_card snd_soc_card_omap3pandora = {
 209         .name = "omap3pandora",
 210         .owner = THIS_MODULE,
 211         .dai_link = omap3pandora_dai,
 212         .num_links = ARRAY_SIZE(omap3pandora_dai),
 213
 214         .dapm_widgets = omap3pandora_dapm_widgets,
 215         .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
 216         .dapm_routes = omap3pandora_map,
 217         .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
 218 };
 219
 220 static struct platform_device *omap3pandora_snd_device;
 221
 222 static int __init omap3pandora_soc_init(void)
 223 {
 224         int ret;
 225
 226         if (!machine_is_omap3_pandora())
 227                 return -ENODEV;
 228
 229         pr_info("OMAP3 Pandora SoC init\n");
 230
 231         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 232         if (omap3pandora_snd_device == NULL) {
 233                 pr_err(PREFIX "Platform device allocation failed\n");
 234                 return -ENOMEM;
 235         }
 236
 237         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 238
 239         ret = platform_device_add(omap3pandora_snd_device);
 240         if (ret) {
 241                 pr_err(PREFIX "Unable to add platform device\n");
 242                 goto fail2;
 243         }
 244
 245         dac_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
 246                                         "dac", GPIOD_OUT_LOW);
 247         if (IS_ERR(dac_power_gpio)) {
 248                 ret = PTR_ERR(dac_power_gpio);
 249                 goto fail3;
 250         }
 251
 252         amp_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
 253                                         "amp", GPIOD_OUT_LOW);
 254         if (IS_ERR(amp_power_gpio)) {
 255                 ret = PTR_ERR(amp_power_gpio);
 256                 goto fail3;
 257         }
 258
 259         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 260         if (IS_ERR(omap3pandora_dac_reg)) {
 261                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 262                         dev_name(&omap3pandora_snd_device->dev),
 263                         PTR_ERR(omap3pandora_dac_reg));
 264                 ret = PTR_ERR(omap3pandora_dac_reg);
 265                 goto fail3;
 266         }
 267
 268         return 0;
 269
 270 fail3:
 271         platform_device_del(omap3pandora_snd_device);
 272 fail2:
 273         platform_device_put(omap3pandora_snd_device);
 274
 275         return ret;
 276 }
 277 module_init(omap3pandora_soc_init);
 278
 279 static void __exit omap3pandora_soc_exit(void)
 280 {
 281         regulator_put(omap3pandora_dac_reg);
 282         platform_device_unregister(omap3pandora_snd_device);
 283 }
 284 module_exit(omap3pandora_soc_exit);
 285
 286 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 287 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 288 MODULE_LICENSE("GPL");