max98357a.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2//
  3// Copyright(c) 2021-2022 Intel Corporation
  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
 17static const struct snd_kcontrol_new card_controls[] = {
 18	SOC_DAPM_PIN_SWITCH("Spk"),
 19};
 20
 21static const struct snd_soc_dapm_widget card_widgets[] = {
 22	SND_SOC_DAPM_SPK("Spk", NULL),
 23};
 24
 25static const struct snd_soc_dapm_route card_base_routes[] = {
 26	{ "Spk", NULL, "Speaker" },
 27};
 28
 29static int
 30avs_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
 49static int avs_create_dai_link(struct device *dev, int ssp_port, int tdm_slot,
 50			       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	dl->name = devm_kasprintf(dev, GFP_KERNEL,
 61				  AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot));
 62	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
 63	dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
 64	if (!dl->name || !dl->cpus || !dl->codecs)
 65		return -ENOMEM;
 66
 67	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,
 68					    AVS_STRING_FMT("SSP", " Pin", ssp_port, tdm_slot));
 69	dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "MX98357A:00");
 70	dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "HiFi");
 71	if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
 72		return -ENOMEM;
 73
 74	platform->name = dev_name(dev);
 75	dl->num_cpus = 1;
 76	dl->num_codecs = 1;
 77	dl->platforms = platform;
 78	dl->num_platforms = 1;
 79	dl->id = 0;
 80	dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC;
 81	dl->be_hw_params_fixup = avs_max98357a_be_fixup;
 82	dl->nonatomic = 1;
 83	dl->no_pcm = 1;
 84	dl->playback_only = 1;
 85
 86	*dai_link = dl;
 87
 88	return 0;
 89}
 90
 91static int avs_max98357a_probe(struct platform_device *pdev)
 92{
 93	struct snd_soc_dai_link *dai_link;
 94	struct snd_soc_acpi_mach *mach;
 95	struct avs_mach_pdata *pdata;
 96	struct snd_soc_card *card;
 97	struct device *dev = &pdev->dev;
 98	int ssp_port, tdm_slot, ret;
 99
100	mach = dev_get_platdata(dev);
101	pdata = mach->pdata;
102
103	ret = avs_mach_get_ssp_tdm(dev, mach, &ssp_port, &tdm_slot);
104	if (ret)
105		return ret;
106
107	ret = avs_create_dai_link(dev, ssp_port, tdm_slot, &dai_link);
108	if (ret) {
109		dev_err(dev, "Failed to create dai link: %d", ret);
110		return ret;
111	}
112
113	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
114	if (!card)
115		return -ENOMEM;
116
117	if (pdata->obsolete_card_names) {
118		card->name = "avs_max98357a";
119	} else {
120		card->driver_name = "avs_max98357a";
121		card->long_name = card->name = "AVS I2S MAX98357A";
122	}
123	card->dev = dev;
124	card->owner = THIS_MODULE;
125	card->dai_link = dai_link;
126	card->num_links = 1;
127	card->controls = card_controls;
128	card->num_controls = ARRAY_SIZE(card_controls);
129	card->dapm_widgets = card_widgets;
130	card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
131	card->dapm_routes = card_base_routes;
132	card->num_dapm_routes = ARRAY_SIZE(card_base_routes);
133	card->fully_routed = true;
134
135	return devm_snd_soc_register_deferrable_card(dev, card);
136}
137
138static const struct platform_device_id avs_max98357a_driver_ids[] = {
139	{
140		.name = "avs_max98357a",
141	},
142	{},
143};
144MODULE_DEVICE_TABLE(platform, avs_max98357a_driver_ids);
145
146static 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
155module_platform_driver(avs_max98357a_driver)
156
157MODULE_DESCRIPTION("Intel max98357a machine driver");
158MODULE_LICENSE("GPL");