sound/soc/qcom/sm8250.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2020, Linaro Limited
   3
   4 #include <linux/module.h>
   5 #include <linux/platform_device.h>
   6 #include <linux/of_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 "qdsp6/q6afe.h"
  12 #include "common.h"
  13
  14 #define DRIVER_NAME             "sm8250"
  15 #define MI2S_BCLK_RATE          1536000
  16
  17 struct sm8250_snd_data {
  18         bool stream_prepared[AFE_PORT_MAX];
  19         struct snd_soc_card *card;
  20         struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
  21 };
  22
  23 static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  24                                      struct snd_pcm_hw_params *params)
  25 {
  26         struct snd_interval *rate = hw_param_interval(params,
  27                                         SNDRV_PCM_HW_PARAM_RATE);
  28         struct snd_interval *channels = hw_param_interval(params,
  29                                         SNDRV_PCM_HW_PARAM_CHANNELS);
  30
  31         rate->min = rate->max = 48000;
  32         channels->min = channels->max = 2;
  33
  34         return 0;
  35 }
  36
  37 static int sm8250_snd_startup(struct snd_pcm_substream *substream)
  38 {
  39         unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
  40         unsigned int codec_dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
  41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  42         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  43         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  44
  45         switch (cpu_dai->id) {
  46         case TERTIARY_MI2S_RX:
  47                 codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
  48                 snd_soc_dai_set_sysclk(cpu_dai,
  49                         Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
  50                         MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
  51                 snd_soc_dai_set_fmt(cpu_dai, fmt);
  52                 snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
  53                 break;
  54         default:
  55                 break;
  56         }
  57         return 0;
  58 }
  59
  60 static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
  61                                 struct snd_pcm_hw_params *params)
  62 {
  63         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  64         struct snd_soc_dai *codec_dai;
  65         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  66         struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
  67         struct sdw_stream_runtime *sruntime;
  68         int i;
  69
  70         switch (cpu_dai->id) {
  71         case WSA_CODEC_DMA_RX_0:
  72                 for_each_rtd_codec_dais(rtd, i, codec_dai) {
  73                         sruntime = snd_soc_dai_get_sdw_stream(codec_dai,
  74                                                       substream->stream);
  75                         if (sruntime != ERR_PTR(-ENOTSUPP))
  76                                 pdata->sruntime[cpu_dai->id] = sruntime;
  77                 }
  78                 break;
  79         }
  80
  81         return 0;
  82
  83 }
  84
  85 static int sm8250_snd_wsa_dma_prepare(struct snd_pcm_substream *substream)
  86 {
  87         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  88         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  89         struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
  90         struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
  91         int ret;
  92
  93         if (!sruntime)
  94                 return 0;
  95
  96         if (data->stream_prepared[cpu_dai->id]) {
  97                 sdw_disable_stream(sruntime);
  98                 sdw_deprepare_stream(sruntime);
  99                 data->stream_prepared[cpu_dai->id] = false;
 100         }
 101
 102         ret = sdw_prepare_stream(sruntime);
 103         if (ret)
 104                 return ret;
 105
 106         /**
 107          * NOTE: there is a strict hw requirement about the ordering of port
 108          * enables and actual WSA881x PA enable. PA enable should only happen
 109          * after soundwire ports are enabled if not DC on the line is
 110          * accumulated resulting in Click/Pop Noise
 111          * PA enable/mute are handled as part of codec DAPM and digital mute.
 112          */
 113
 114         ret = sdw_enable_stream(sruntime);
 115         if (ret) {
 116                 sdw_deprepare_stream(sruntime);
 117                 return ret;
 118         }
 119         data->stream_prepared[cpu_dai->id]  = true;
 120
 121         return ret;
 122 }
 123
 124 static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
 125 {
 126         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 127         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 128
 129         switch (cpu_dai->id) {
 130         case WSA_CODEC_DMA_RX_0:
 131         case WSA_CODEC_DMA_RX_1:
 132                 return sm8250_snd_wsa_dma_prepare(substream);
 133         default:
 134                 break;
 135         }
 136
 137         return 0;
 138 }
 139
 140 static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
 141 {
 142         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 143         struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
 144         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 145         struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
 146
 147         switch (cpu_dai->id) {
 148         case WSA_CODEC_DMA_RX_0:
 149         case WSA_CODEC_DMA_RX_1:
 150                 if (sruntime && data->stream_prepared[cpu_dai->id]) {
 151                         sdw_disable_stream(sruntime);
 152                         sdw_deprepare_stream(sruntime);
 153                         data->stream_prepared[cpu_dai->id] = false;
 154                 }
 155                 break;
 156         default:
 157                 break;
 158         }
 159
 160         return 0;
 161 }
 162
 163 static const struct snd_soc_ops sm8250_be_ops = {
 164         .startup = sm8250_snd_startup,
 165         .hw_params = sm8250_snd_hw_params,
 166         .hw_free = sm8250_snd_hw_free,
 167         .prepare = sm8250_snd_prepare,
 168 };
 169
 170 static void sm8250_add_be_ops(struct snd_soc_card *card)
 171 {
 172         struct snd_soc_dai_link *link;
 173         int i;
 174
 175         for_each_card_prelinks(card, i, link) {
 176                 if (link->no_pcm == 1) {
 177                         link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
 178                         link->ops = &sm8250_be_ops;
 179                 }
 180         }
 181 }
 182
 183 static int sm8250_platform_probe(struct platform_device *pdev)
 184 {
 185         struct snd_soc_card *card;
 186         struct sm8250_snd_data *data;
 187         struct device *dev = &pdev->dev;
 188         int ret;
 189
 190         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 191         if (!card)
 192                 return -ENOMEM;
 193
 194         /* Allocate the private data */
 195         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 196         if (!data)
 197                 return -ENOMEM;
 198
 199         card->dev = dev;
 200         dev_set_drvdata(dev, card);
 201         snd_soc_card_set_drvdata(card, data);
 202         ret = qcom_snd_parse_of(card);
 203         if (ret)
 204                 return ret;
 205
 206         card->driver_name = DRIVER_NAME;
 207         sm8250_add_be_ops(card);
 208         return devm_snd_soc_register_card(dev, card);
 209 }
 210
 211 static const struct of_device_id snd_sm8250_dt_match[] = {
 212         {.compatible = "qcom,sm8250-sndcard"},
 213         {.compatible = "qcom,qrb5165-rb5-sndcard"},
 214         {}
 215 };
 216
 217 MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
 218
 219 static struct platform_driver snd_sm8250_driver = {
 220         .probe  = sm8250_platform_probe,
 221         .driver = {
 222                 .name = "snd-sm8250",
 223                 .of_match_table = snd_sm8250_dt_match,
 224         },
 225 };
 226 module_platform_driver(snd_sm8250_driver);
 227 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
 228 MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
 229 MODULE_LICENSE("GPL v2");