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
17 static const struct snd_kcontrol_new card_controls[] = {
18 SOC_DAPM_PIN_SWITCH("Spk"),
19 };
20
21 static const struct snd_soc_dapm_widget card_widgets[] = {
22 SND_SOC_DAPM_SPK("Spk", NULL),
23 };
24
25 static const struct snd_soc_dapm_route card_base_routes[] = {
26 { "Spk", NULL, "Speaker" },
27 };
28
29 static int
avs_max98357a_be_fixup(struct snd_soc_pcm_runtime * runrime,struct snd_pcm_hw_params * params)30 avs_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
avs_create_dai_link(struct device * dev,const char * platform_name,int ssp_port,int tdm_slot,struct snd_soc_dai_link ** dai_link)49 static 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_CBC_CFC;
82 dl->be_hw_params_fixup = avs_max98357a_be_fixup;
83 dl->nonatomic = 1;
84 dl->no_pcm = 1;
85 dl->playback_only = 1;
86
87 *dai_link = dl;
88
89 return 0;
90 }
91
avs_max98357a_probe(struct platform_device * pdev)92 static 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 avs_mach_pdata *pdata;
97 struct snd_soc_card *card;
98 struct device *dev = &pdev->dev;
99 const char *pname;
100 int ssp_port, tdm_slot, ret;
101
102 mach = dev_get_platdata(dev);
103 pname = mach->mach_params.platform;
104 pdata = mach->pdata;
105
106 ret = avs_mach_get_ssp_tdm(dev, mach, &ssp_port, &tdm_slot);
107 if (ret)
108 return ret;
109
110 ret = avs_create_dai_link(dev, pname, ssp_port, tdm_slot, &dai_link);
111 if (ret) {
112 dev_err(dev, "Failed to create dai link: %d", ret);
113 return ret;
114 }
115
116 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
117 if (!card)
118 return -ENOMEM;
119
120 if (pdata->obsolete_card_names) {
121 card->name = "avs_max98357a";
122 } else {
123 card->driver_name = "avs_max98357a";
124 card->long_name = card->name = "AVS I2S MAX98357A";
125 }
126 card->dev = dev;
127 card->owner = THIS_MODULE;
128 card->dai_link = dai_link;
129 card->num_links = 1;
130 card->controls = card_controls;
131 card->num_controls = ARRAY_SIZE(card_controls);
132 card->dapm_widgets = card_widgets;
133 card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
134 card->dapm_routes = card_base_routes;
135 card->num_dapm_routes = ARRAY_SIZE(card_base_routes);
136 card->fully_routed = true;
137
138 ret = snd_soc_fixup_dai_links_platform_name(card, pname);
139 if (ret)
140 return ret;
141
142 return devm_snd_soc_register_deferrable_card(dev, card);
143 }
144
145 static const struct platform_device_id avs_max98357a_driver_ids[] = {
146 {
147 .name = "avs_max98357a",
148 },
149 {},
150 };
151 MODULE_DEVICE_TABLE(platform, avs_max98357a_driver_ids);
152
153 static struct platform_driver avs_max98357a_driver = {
154 .probe = avs_max98357a_probe,
155 .driver = {
156 .name = "avs_max98357a",
157 .pm = &snd_soc_pm_ops,
158 },
159 .id_table = avs_max98357a_driver_ids,
160 };
161
162 module_platform_driver(avs_max98357a_driver)
163
164 MODULE_DESCRIPTION("Intel max98357a machine driver");
165 MODULE_LICENSE("GPL");
166