avs/boards/max98357a.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 //
0003 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
0004 //
0005 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
0006 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
0007 //
0008
0009 #include <linux/module.h>
0010 #include <linux/platform_device.h>
0011 #include <sound/soc.h>
0012 #include <sound/soc-acpi.h>
0013 #include <sound/soc-dapm.h>
0014
0015 static const struct snd_kcontrol_new card_controls[] = {
0016     SOC_DAPM_PIN_SWITCH("Spk"),
0017 };
0018
0019 static const struct snd_soc_dapm_widget card_widgets[] = {
0020     SND_SOC_DAPM_SPK("Spk", NULL),
0021 };
0022
0023 static const struct snd_soc_dapm_route card_base_routes[] = {
0024     { "Spk", NULL, "Speaker" },
0025 };
0026
0027 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
0028                    struct snd_soc_dai_link **dai_link)
0029 {
0030     struct snd_soc_dai_link_component *platform;
0031     struct snd_soc_dai_link *dl;
0032
0033     dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
0034     platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
0035     if (!dl || !platform)
0036         return -ENOMEM;
0037
0038     platform->name = platform_name;
0039
0040     dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
0041     dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
0042     dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
0043     if (!dl->name || !dl->cpus || !dl->codecs)
0044         return -ENOMEM;
0045
0046     dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port);
0047     dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "MX98357A:00");
0048     dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "HiFi");
0049     if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
0050         return -ENOMEM;
0051
0052     dl->num_cpus = 1;
0053     dl->num_codecs = 1;
0054     dl->platforms = platform;
0055     dl->num_platforms = 1;
0056     dl->id = 0;
0057     dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
0058     dl->nonatomic = 1;
0059     dl->no_pcm = 1;
0060     dl->dpcm_playback = 1;
0061
0062     *dai_link = dl;
0063
0064     return 0;
0065 }
0066
0067 static int avs_create_dapm_routes(struct device *dev, int ssp_port,
0068                   struct snd_soc_dapm_route **routes, int *num_routes)
0069 {
0070     struct snd_soc_dapm_route *dr;
0071     const int num_base = ARRAY_SIZE(card_base_routes);
0072     const int num_dr = num_base + 1;
0073     int idx;
0074
0075     dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL);
0076     if (!dr)
0077         return -ENOMEM;
0078
0079     memcpy(dr, card_base_routes, num_base * sizeof(*dr));
0080
0081     idx = num_base;
0082     dr[idx].sink = devm_kasprintf(dev, GFP_KERNEL, "HiFi Playback");
0083     dr[idx].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port);
0084     if (!dr[idx].sink || !dr[idx].source)
0085         return -ENOMEM;
0086
0087     *routes = dr;
0088     *num_routes = num_dr;
0089
0090     return 0;
0091 }
0092
0093 static int avs_max98357a_probe(struct platform_device *pdev)
0094 {
0095     struct snd_soc_dapm_route *routes;
0096     struct snd_soc_dai_link *dai_link;
0097     struct snd_soc_acpi_mach *mach;
0098     struct snd_soc_card *card;
0099     struct device *dev = &pdev->dev;
0100     const char *pname;
0101     int num_routes, ssp_port, ret;
0102
0103     mach = dev_get_platdata(dev);
0104     pname = mach->mach_params.platform;
0105     ssp_port = __ffs(mach->mach_params.i2s_link_mask);
0106
0107     ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
0108     if (ret) {
0109         dev_err(dev, "Failed to create dai link: %d", ret);
0110         return ret;
0111     }
0112
0113     ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes);
0114     if (ret) {
0115         dev_err(dev, "Failed to create dapm routes: %d", ret);
0116         return ret;
0117     }
0118
0119     card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
0120     if (!card)
0121         return -ENOMEM;
0122
0123     card->name = "avs_max98357a";
0124     card->dev = dev;
0125     card->owner = THIS_MODULE;
0126     card->dai_link = dai_link;
0127     card->num_links = 1;
0128     card->controls = card_controls;
0129     card->num_controls = ARRAY_SIZE(card_controls);
0130     card->dapm_widgets = card_widgets;
0131     card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
0132     card->dapm_routes = routes;
0133     card->num_dapm_routes = num_routes;
0134     card->fully_routed = true;
0135
0136     ret = snd_soc_fixup_dai_links_platform_name(card, pname);
0137     if (ret)
0138         return ret;
0139
0140     return devm_snd_soc_register_card(dev, card);
0141 }
0142
0143 static struct platform_driver avs_max98357a_driver = {
0144     .probe = avs_max98357a_probe,
0145     .driver = {
0146         .name = "avs_max98357a",
0147         .pm = &snd_soc_pm_ops,
0148     },
0149 };
0150
0151 module_platform_driver(avs_max98357a_driver)
0152
0153 MODULE_LICENSE("GPL");
0154 MODULE_ALIAS("platform:avs_max98357a");