1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Copyright(c) 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
16#define MAX98927_DEV0_NAME	"i2c-MX98927:00"
17#define MAX98927_DEV1_NAME	"i2c-MX98927:01"
18#define MAX98927_CODEC_NAME	"max98927-aif1"
19
20static struct snd_soc_codec_conf card_codec_conf[] = {
21	{
22		.dlc = COMP_CODEC_CONF(MAX98927_DEV0_NAME),
23		.name_prefix = "Right",
24	},
25	{
26		.dlc = COMP_CODEC_CONF(MAX98927_DEV1_NAME),
27		.name_prefix = "Left",
28	},
29};
30
31static const struct snd_kcontrol_new card_controls[] = {
32	SOC_DAPM_PIN_SWITCH("Left Spk"),
33	SOC_DAPM_PIN_SWITCH("Right Spk"),
34};
35
36static const struct snd_soc_dapm_widget card_widgets[] = {
37	SND_SOC_DAPM_SPK("Left Spk", NULL),
38	SND_SOC_DAPM_SPK("Right Spk", NULL),
39};
40
41static const struct snd_soc_dapm_route card_base_routes[] = {
42	{ "Left Spk", NULL, "Left BE_OUT" },
43	{ "Right Spk", NULL, "Right BE_OUT" },
44};
45
46static int
47avs_max98927_be_fixup(struct snd_soc_pcm_runtime *runrime, struct snd_pcm_hw_params *params)
48{
49	struct snd_interval *rate, *channels;
50	struct snd_mask *fmt;
51
52	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
53	channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
54	fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
55
56	/* The ADSP will convert the FE rate to 48k, stereo */
57	rate->min = rate->max = 48000;
58	channels->min = channels->max = 2;
59
60	/* set SSP0 to 16 bit */
61	snd_mask_none(fmt);
62	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
63	return 0;
64}
65
66static int avs_max98927_hw_params(struct snd_pcm_substream *substream,
67				  struct snd_pcm_hw_params *params)
68{
69	struct snd_soc_pcm_runtime *runtime = asoc_substream_to_rtd(substream);
70	struct snd_soc_dai *codec_dai;
71	int ret = 0;
72	int i;
73
74	for_each_rtd_codec_dais(runtime, i, codec_dai) {
75		if (!strcmp(codec_dai->component->name, MAX98927_DEV0_NAME))
76			ret = snd_soc_dai_set_tdm_slot(codec_dai, 0x30, 3, 8, 16);
77		else if (!strcmp(codec_dai->component->name, MAX98927_DEV1_NAME))
78			ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xC0, 3, 8, 16);
79
80		if (ret < 0) {
81			dev_err(runtime->dev, "hw_params for %s failed: %d\n",
82				codec_dai->component->name, ret);
83			return ret;
84		}
85	}
86
87	return 0;
88}
89
90static const struct snd_soc_ops avs_max98927_ops = {
91	.hw_params = avs_max98927_hw_params,
92};
93
94static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
95			       struct snd_soc_dai_link **dai_link)
96{
97	struct snd_soc_dai_link_component *platform;
98	struct snd_soc_dai_link *dl;
99
100	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
101	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
102	if (!dl || !platform)
103		return -ENOMEM;
104
105	platform->name = platform_name;
106
107	dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
108	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
109	dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs) * 2, GFP_KERNEL);
110	if (!dl->name || !dl->cpus || !dl->codecs)
111		return -ENOMEM;
112
113	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port);
114	dl->codecs[0].name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_DEV0_NAME);
115	dl->codecs[0].dai_name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_CODEC_NAME);
116	dl->codecs[1].name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_DEV1_NAME);
117	dl->codecs[1].dai_name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_CODEC_NAME);
118	if (!dl->cpus->dai_name || !dl->codecs[0].name || !dl->codecs[0].dai_name ||
119	    !dl->codecs[1].name || !dl->codecs[1].dai_name)
120		return -ENOMEM;
121
122	dl->num_cpus = 1;
123	dl->num_codecs = 2;
124	dl->platforms = platform;
125	dl->num_platforms = 1;
126	dl->id = 0;
127	dl->dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
128	dl->be_hw_params_fixup = avs_max98927_be_fixup;
129	dl->nonatomic = 1;
130	dl->no_pcm = 1;
131	dl->dpcm_capture = 1;
132	dl->dpcm_playback = 1;
133	dl->ignore_pmdown_time = 1;
134	dl->ops = &avs_max98927_ops;
135
136	*dai_link = dl;
137
138	return 0;
139}
140
141static int avs_max98927_probe(struct platform_device *pdev)
142{
143	struct snd_soc_dai_link *dai_link;
144	struct snd_soc_acpi_mach *mach;
145	struct snd_soc_card *card;
146	struct device *dev = &pdev->dev;
147	const char *pname;
148	int ssp_port, ret;
149
150	mach = dev_get_platdata(dev);
151	pname = mach->mach_params.platform;
152	ssp_port = __ffs(mach->mach_params.i2s_link_mask);
153
154	ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
155	if (ret) {
156		dev_err(dev, "Failed to create dai link: %d", ret);
157		return ret;
158	}
159
160	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
161	if (!card)
162		return -ENOMEM;
163
164	card->name = "avs_max98927";
165	card->dev = dev;
166	card->owner = THIS_MODULE;
167	card->dai_link = dai_link;
168	card->num_links = 1;
169	card->codec_conf = card_codec_conf;
170	card->num_configs = ARRAY_SIZE(card_codec_conf);
171	card->controls = card_controls;
172	card->num_controls = ARRAY_SIZE(card_controls);
173	card->dapm_widgets = card_widgets;
174	card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
175	card->dapm_routes = card_base_routes;
176	card->num_dapm_routes = ARRAY_SIZE(card_base_routes);
177	card->fully_routed = true;
178
179	ret = snd_soc_fixup_dai_links_platform_name(card, pname);
180	if (ret)
181		return ret;
182
183	return devm_snd_soc_register_card(dev, card);
184}
185
186static struct platform_driver avs_max98927_driver = {
187	.probe = avs_max98927_probe,
188	.driver = {
189		.name = "avs_max98927",
190		.pm = &snd_soc_pm_ops,
191	},
192};
193
194module_platform_driver(avs_max98927_driver)
195
196MODULE_LICENSE("GPL");
197MODULE_ALIAS("platform:avs_max98927");
198