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
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, 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
92static 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
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");
159