sound/soc/codecs/cq93vc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
   4  *
   5  * Copyright (C) 2010 Texas Instruments, Inc
   6  *
   7  * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
   8  */
   9 #include <linux/module.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/init.h>
  12 #include <linux/io.h>
  13 #include <linux/delay.h>
  14 #include <linux/pm.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/device.h>
  17 #include <linux/slab.h>
  18 #include <linux/clk.h>
  19 #include <linux/mfd/davinci_voicecodec.h>
  20 #include <linux/spi/spi.h>
  21
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/initval.h>
  27
  28 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  29         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  30         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  31 };
  32
  33 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  34 {
  35         struct snd_soc_component *component = dai->component;
  36         u8 reg;
  37
  38         if (mute)
  39                 reg = DAVINCI_VC_REG09_MUTE;
  40         else
  41                 reg = 0;
  42
  43         snd_soc_component_update_bits(component, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
  44                             reg);
  45
  46         return 0;
  47 }
  48
  49 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
  50                                  int clk_id, unsigned int freq, int dir)
  51 {
  52         switch (freq) {
  53         case 22579200:
  54         case 27000000:
  55         case 33868800:
  56                 return 0;
  57         }
  58
  59         return -EINVAL;
  60 }
  61
  62 static int cq93vc_set_bias_level(struct snd_soc_component *component,
  63                                 enum snd_soc_bias_level level)
  64 {
  65         switch (level) {
  66         case SND_SOC_BIAS_ON:
  67                 snd_soc_component_write(component, DAVINCI_VC_REG12,
  68                              DAVINCI_VC_REG12_POWER_ALL_ON);
  69                 break;
  70         case SND_SOC_BIAS_PREPARE:
  71                 break;
  72         case SND_SOC_BIAS_STANDBY:
  73                 snd_soc_component_write(component, DAVINCI_VC_REG12,
  74                              DAVINCI_VC_REG12_POWER_ALL_OFF);
  75                 break;
  76         case SND_SOC_BIAS_OFF:
  77                 /* force all power off */
  78                 snd_soc_component_write(component, DAVINCI_VC_REG12,
  79                              DAVINCI_VC_REG12_POWER_ALL_OFF);
  80                 break;
  81         }
  82
  83         return 0;
  84 }
  85
  86 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
  87 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
  88
  89 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
  90         .digital_mute   = cq93vc_mute,
  91         .set_sysclk     = cq93vc_set_dai_sysclk,
  92 };
  93
  94 static struct snd_soc_dai_driver cq93vc_dai = {
  95         .name = "cq93vc-hifi",
  96         .playback = {
  97                 .stream_name = "Playback",
  98                 .channels_min = 1,
  99                 .channels_max = 2,
 100                 .rates = CQ93VC_RATES,
 101                 .formats = CQ93VC_FORMATS,},
 102         .capture = {
 103                 .stream_name = "Capture",
 104                 .channels_min = 1,
 105                 .channels_max = 2,
 106                 .rates = CQ93VC_RATES,
 107                 .formats = CQ93VC_FORMATS,},
 108         .ops = &cq93vc_dai_ops,
 109 };
 110
 111 static int cq93vc_probe(struct snd_soc_component *component)
 112 {
 113         struct davinci_vc *davinci_vc = component->dev->platform_data;
 114
 115         snd_soc_component_init_regmap(component, davinci_vc->regmap);
 116
 117         return 0;
 118 }
 119
 120 static const struct snd_soc_component_driver soc_component_dev_cq93vc = {
 121         .set_bias_level         = cq93vc_set_bias_level,
 122         .probe                  = cq93vc_probe,
 123         .controls               = cq93vc_snd_controls,
 124         .num_controls           = ARRAY_SIZE(cq93vc_snd_controls),
 125         .idle_bias_on           = 1,
 126         .use_pmdown_time        = 1,
 127         .endianness             = 1,
 128         .non_legacy_dai_naming  = 1,
 129 };
 130
 131 static int cq93vc_platform_probe(struct platform_device *pdev)
 132 {
 133         return devm_snd_soc_register_component(&pdev->dev,
 134                         &soc_component_dev_cq93vc, &cq93vc_dai, 1);
 135 }
 136
 137 static int cq93vc_platform_remove(struct platform_device *pdev)
 138 {
 139         return 0;
 140 }
 141
 142 static struct platform_driver cq93vc_codec_driver = {
 143         .driver = {
 144                         .name = "cq93vc-codec",
 145         },
 146
 147         .probe = cq93vc_platform_probe,
 148         .remove = cq93vc_platform_remove,
 149 };
 150
 151 module_platform_driver(cq93vc_codec_driver);
 152
 153 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 154 MODULE_AUTHOR("Miguel Aguilar");
 155 MODULE_LICENSE("GPL");