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
16static const struct snd_kcontrol_new card_controls[] = {
17	SOC_DAPM_PIN_SWITCH("Spk"),
18};
19
20static const struct snd_soc_dapm_widget card_widgets[] = {
21	SND_SOC_DAPM_SPK("Spk", NULL),
22};
23
24static const struct snd_soc_dapm_route card_base_routes[] = {
25	{ "Spk", NULL, "Speaker" },
26};
27
28static int
29avs_max98357a_be_fixup(struct snd_soc_pcm_runtime *runrime, struct snd_pcm_hw_params *params)
30{
31	struct snd_interval *rate, *channels;
32	struct snd_mask *fmt;
33
34	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
35	channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
36	fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
37
38	/* The ADSP will convert the FE rate to 48k, stereo */
39	rate->min = rate->max = 48000;
40	channels->min = channels->max = 2;
41
42	/* set SSP0 to 16 bit */
43	snd_mask_none(fmt);
44	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
45	return 0;
46}
47
48static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
49			       struct snd_soc_dai_link **dai_link)
50{
51	struct snd_soc_dai_link_component *platform;
52	struct snd_soc_dai_link *dl;
53
54	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
55	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
56	if (!dl || !platform)
57		return -ENOMEM;
58
59	platform->name = platform_name;
60
61	dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
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, "SSP%d Pin", ssp_port);
68	dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "MX98357A:00");
69	dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "HiFi");
70	if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
71		return -ENOMEM;
72
73	dl->num_cpus = 1;
74	dl->num_codecs = 1;
75	dl->platforms = platform;
76	dl->num_platforms = 1;
77	dl->id = 0;
78	dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
79	dl->be_hw_params_fixup = avs_max98357a_be_fixup;
80	dl->nonatomic = 1;
81	dl->no_pcm = 1;
82	dl->dpcm_playback = 1;
83
84	*dai_link = dl;
85
86	return 0;
87}
88
89static int avs_max98357a_probe(struct platform_device *pdev)
90{
91	struct snd_soc_dai_link *dai_link;
92	struct snd_soc_acpi_mach *mach;
93	struct snd_soc_card *card;
94	struct device *dev = &pdev->dev;
95	const char *pname;
96	int ssp_port, ret;
97
98	mach = dev_get_platdata(dev);
99	pname = mach->mach_params.platform;
100	ssp_port = __ffs(mach->mach_params.i2s_link_mask);
101
102	ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
103	if (ret) {
104		dev_err(dev, "Failed to create dai link: %d", ret);
105		return ret;
106	}
107
108	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
109	if (!card)
110		return -ENOMEM;
111
112	card->name = "avs_max98357a";
113	card->dev = dev;
114	card->owner = THIS_MODULE;
115	card->dai_link = dai_link;
116	card->num_links = 1;
117	card->controls = card_controls;
118	card->num_controls = ARRAY_SIZE(card_controls);
119	card->dapm_widgets = card_widgets;
120	card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
121	card->dapm_routes = card_base_routes;
122	card->num_dapm_routes = ARRAY_SIZE(card_base_routes);
123	card->fully_routed = true;
124
125	ret = snd_soc_fixup_dai_links_platform_name(card, pname);
126	if (ret)
127		return ret;
128
129	return devm_snd_soc_register_card(dev, card);
130}
131
132static struct platform_driver avs_max98357a_driver = {
133	.probe = avs_max98357a_probe,
134	.driver = {
135		.name = "avs_max98357a",
136		.pm = &snd_soc_pm_ops,
137	},
138};
139
140module_platform_driver(avs_max98357a_driver)
141
142MODULE_LICENSE("GPL");
143MODULE_ALIAS("platform:avs_max98357a");
144