sound/soc/qcom/sm8250.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2020, Linaro Limited
   3
   4 #include <dt-bindings/sound/qcom,q6afe.h>
   5 #include <linux/module.h>
   6 #include <linux/platform_device.h>
   7 #include <sound/soc.h>
   8 #include <sound/soc-dapm.h>
   9 #include <sound/pcm.h>
  10 #include <linux/soundwire/sdw.h>
  11 #include <sound/jack.h>
  12 #include <linux/input-event-codes.h>
  13 #include "qdsp6/q6afe.h"
  14 #include "common.h"
  15 #include "sdw.h"
  16
  17 #define DRIVER_NAME             "sm8250"
  18 #define MI2S_BCLK_RATE          1536000
  19
  20 struct sm8250_snd_data {
  21         bool stream_prepared[AFE_PORT_MAX];
  22         struct snd_soc_card *card;
  23         struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
  24         struct snd_soc_jack jack;
  25         bool jack_setup;
  26 };
  27
  28 static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
  29 {
  30         struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
  31
  32         return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
  33 }
  34
  35 static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  36                                      struct snd_pcm_hw_params *params)
  37 {
  38         struct snd_interval *rate = hw_param_interval(params,
  39                                         SNDRV_PCM_HW_PARAM_RATE);
  40         struct snd_interval *channels = hw_param_interval(params,
  41                                         SNDRV_PCM_HW_PARAM_CHANNELS);
  42
  43         rate->min = rate->max = 48000;
  44         channels->min = channels->max = 2;
  45
  46         return 0;
  47 }
  48
  49 static int sm8250_snd_startup(struct snd_pcm_substream *substream)
  50 {
  51         unsigned int fmt = SND_SOC_DAIFMT_BP_FP;
  52         unsigned int codec_dai_fmt = SND_SOC_DAIFMT_BC_FC;
  53         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  54         struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  55         struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
  56
  57         switch (cpu_dai->id) {
  58         case TERTIARY_MI2S_RX:
  59                 codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
  60                 snd_soc_dai_set_sysclk(cpu_dai,
  61                         Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
  62                         MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
  63                 snd_soc_dai_set_fmt(cpu_dai, fmt);
  64                 snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
  65                 break;
  66         default:
  67                 break;
  68         }
  69         return 0;
  70 }
  71
  72 static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
  73                                 struct snd_pcm_hw_params *params)
  74 {
  75         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  76         struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  77         struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
  78
  79         return qcom_snd_sdw_hw_params(substream, params, &pdata->sruntime[cpu_dai->id]);
  80 }
  81
  82 static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
  83 {
  84         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  85         struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  86         struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
  87         struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
  88
  89         return qcom_snd_sdw_prepare(substream, sruntime,
  90                                     &data->stream_prepared[cpu_dai->id]);
  91 }
  92
  93 static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
  94 {
  95         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  96         struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
  97         struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
  98         struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
  99
 100         return qcom_snd_sdw_hw_free(substream, sruntime,
 101                                     &data->stream_prepared[cpu_dai->id]);
 102 }
 103
 104 static const struct snd_soc_ops sm8250_be_ops = {
 105         .startup = sm8250_snd_startup,
 106         .hw_params = sm8250_snd_hw_params,
 107         .hw_free = sm8250_snd_hw_free,
 108         .prepare = sm8250_snd_prepare,
 109 };
 110
 111 static void sm8250_add_be_ops(struct snd_soc_card *card)
 112 {
 113         struct snd_soc_dai_link *link;
 114         int i;
 115
 116         for_each_card_prelinks(card, i, link) {
 117                 if (link->no_pcm == 1) {
 118                         link->init = sm8250_snd_init;
 119                         link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
 120                         link->ops = &sm8250_be_ops;
 121                 }
 122         }
 123 }
 124
 125 static int sm8250_platform_probe(struct platform_device *pdev)
 126 {
 127         struct snd_soc_card *card;
 128         struct sm8250_snd_data *data;
 129         struct device *dev = &pdev->dev;
 130         int ret;
 131
 132         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 133         if (!card)
 134                 return -ENOMEM;
 135
 136         card->owner = THIS_MODULE;
 137         /* Allocate the private data */
 138         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 139         if (!data)
 140                 return -ENOMEM;
 141
 142         card->dev = dev;
 143         dev_set_drvdata(dev, card);
 144         snd_soc_card_set_drvdata(card, data);
 145         ret = qcom_snd_parse_of(card);
 146         if (ret)
 147                 return ret;
 148
 149         card->driver_name = DRIVER_NAME;
 150         sm8250_add_be_ops(card);
 151         return devm_snd_soc_register_card(dev, card);
 152 }
 153
 154 static const struct of_device_id snd_sm8250_dt_match[] = {
 155         {.compatible = "qcom,sm8250-sndcard"},
 156         {.compatible = "qcom,qrb5165-rb5-sndcard"},
 157         {}
 158 };
 159
 160 MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
 161
 162 static struct platform_driver snd_sm8250_driver = {
 163         .probe  = sm8250_platform_probe,
 164         .driver = {
 165                 .name = "snd-sm8250",
 166                 .of_match_table = snd_sm8250_dt_match,
 167         },
 168 };
 169 module_platform_driver(snd_sm8250_driver);
 170 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
 171 MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
 172 MODULE_LICENSE("GPL v2");