sound/soc/intel/avs/boards/max98357a.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
   4 //
   5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
   6 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
   7 //
   8
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <sound/pcm_params.h>
  12 #include <sound/soc.h>
  13 #include <sound/soc-acpi.h>
  14 #include <sound/soc-dapm.h>
  15 #include "../utils.h"
  16
  17 static const struct snd_kcontrol_new card_controls[] = {
  18         SOC_DAPM_PIN_SWITCH("Spk"),
  19 };
  20
  21 static const struct snd_soc_dapm_widget card_widgets[] = {
  22         SND_SOC_DAPM_SPK("Spk", NULL),
  23 };
  24
  25 static const struct snd_soc_dapm_route card_base_routes[] = {
  26         { "Spk", NULL, "Speaker" },
  27 };
  28
  29 static int
  30 avs_max98357a_be_fixup(struct snd_soc_pcm_runtime *runrime, struct snd_pcm_hw_params *params)
  31 {
  32         struct snd_interval *rate, *channels;
  33         struct snd_mask *fmt;
  34
  35         rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  36         channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  37         fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
  38
  39         /* The ADSP will convert the FE rate to 48k, stereo */
  40         rate->min = rate->max = 48000;
  41         channels->min = channels->max = 2;
  42
  43         /* set SSP0 to 16 bit */
  44         snd_mask_none(fmt);
  45         snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
  46         return 0;
  47 }
  48
  49 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
  50                                int tdm_slot, struct snd_soc_dai_link **dai_link)
  51 {
  52         struct snd_soc_dai_link_component *platform;
  53         struct snd_soc_dai_link *dl;
  54
  55         dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
  56         platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
  57         if (!dl || !platform)
  58                 return -ENOMEM;
  59
  60         platform->name = platform_name;
  61
  62         dl->name = devm_kasprintf(dev, GFP_KERNEL,
  63                                   AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot));
  64         dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
  65         dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
  66         if (!dl->name || !dl->cpus || !dl->codecs)
  67                 return -ENOMEM;
  68
  69         dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,
  70                                             AVS_STRING_FMT("SSP", " Pin", ssp_port, tdm_slot));
  71         dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "MX98357A:00");
  72         dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "HiFi");
  73         if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
  74                 return -ENOMEM;
  75
  76         dl->num_cpus = 1;
  77         dl->num_codecs = 1;
  78         dl->platforms = platform;
  79         dl->num_platforms = 1;
  80         dl->id = 0;
  81         dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
  82         dl->be_hw_params_fixup = avs_max98357a_be_fixup;
  83         dl->nonatomic = 1;
  84         dl->no_pcm = 1;
  85         dl->dpcm_playback = 1;
  86
  87         *dai_link = dl;
  88
  89         return 0;
  90 }
  91
  92 static int avs_max98357a_probe(struct platform_device *pdev)
  93 {
  94         struct snd_soc_dai_link *dai_link;
  95         struct snd_soc_acpi_mach *mach;
  96         struct snd_soc_card *card;
  97         struct device *dev = &pdev->dev;
  98         const char *pname;
  99         int ssp_port, tdm_slot, ret;
 100
 101         mach = dev_get_platdata(dev);
 102         pname = mach->mach_params.platform;
 103
 104         ret = avs_mach_get_ssp_tdm(dev, mach, &ssp_port, &tdm_slot);
 105         if (ret)
 106                 return ret;
 107
 108         ret = avs_create_dai_link(dev, pname, ssp_port, tdm_slot, &dai_link);
 109         if (ret) {
 110                 dev_err(dev, "Failed to create dai link: %d", ret);
 111                 return ret;
 112         }
 113
 114         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 115         if (!card)
 116                 return -ENOMEM;
 117
 118         card->name = "avs_max98357a";
 119         card->dev = dev;
 120         card->owner = THIS_MODULE;
 121         card->dai_link = dai_link;
 122         card->num_links = 1;
 123         card->controls = card_controls;
 124         card->num_controls = ARRAY_SIZE(card_controls);
 125         card->dapm_widgets = card_widgets;
 126         card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
 127         card->dapm_routes = card_base_routes;
 128         card->num_dapm_routes = ARRAY_SIZE(card_base_routes);
 129         card->fully_routed = true;
 130
 131         ret = snd_soc_fixup_dai_links_platform_name(card, pname);
 132         if (ret)
 133                 return ret;
 134
 135         return devm_snd_soc_register_card(dev, card);
 136 }
 137
 138 static const struct platform_device_id avs_max98357a_driver_ids[] = {
 139         {
 140                 .name = "avs_max98357a",
 141         },
 142         {},
 143 };
 144 MODULE_DEVICE_TABLE(platform, avs_max98357a_driver_ids);
 145
 146 static struct platform_driver avs_max98357a_driver = {
 147         .probe = avs_max98357a_probe,
 148         .driver = {
 149                 .name = "avs_max98357a",
 150                 .pm = &snd_soc_pm_ops,
 151         },
 152         .id_table = avs_max98357a_driver_ids,
 153 };
 154
 155 module_platform_driver(avs_max98357a_driver)
 156
 157 MODULE_DESCRIPTION("Intel max98357a machine driver");
 158 MODULE_LICENSE("GPL");