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/soc.h> 12 #include <sound/soc-acpi.h> 13 #include <sound/soc-dapm.h> 14 15 static const struct snd_kcontrol_new card_controls[] = { 16 SOC_DAPM_PIN_SWITCH("Spk"), 17 }; 18 19 static const struct snd_soc_dapm_widget card_widgets[] = { 20 SND_SOC_DAPM_SPK("Spk", NULL), 21 }; 22 23 static const struct snd_soc_dapm_route card_base_routes[] = { 24 { "Spk", NULL, "Speaker" }, 25 }; 26 27 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port, 28 struct snd_soc_dai_link **dai_link) 29 { 30 struct snd_soc_dai_link_component *platform; 31 struct snd_soc_dai_link *dl; 32 33 dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL); 34 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL); 35 if (!dl || !platform) 36 return -ENOMEM; 37 38 platform->name = platform_name; 39 40 dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port); 41 dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL); 42 dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL); 43 if (!dl->name || !dl->cpus || !dl->codecs) 44 return -ENOMEM; 45 46 dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port); 47 dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "MX98357A:00"); 48 dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "HiFi"); 49 if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name) 50 return -ENOMEM; 51 52 dl->num_cpus = 1; 53 dl->num_codecs = 1; 54 dl->platforms = platform; 55 dl->num_platforms = 1; 56 dl->id = 0; 57 dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS; 58 dl->nonatomic = 1; 59 dl->no_pcm = 1; 60 dl->dpcm_playback = 1; 61 62 *dai_link = dl; 63 64 return 0; 65 } 66 67 static int avs_create_dapm_routes(struct device *dev, int ssp_port, 68 struct snd_soc_dapm_route **routes, int *num_routes) 69 { 70 struct snd_soc_dapm_route *dr; 71 const int num_base = ARRAY_SIZE(card_base_routes); 72 const int num_dr = num_base + 1; 73 int idx; 74 75 dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL); 76 if (!dr) 77 return -ENOMEM; 78 79 memcpy(dr, card_base_routes, num_base * sizeof(*dr)); 80 81 idx = num_base; 82 dr[idx].sink = devm_kasprintf(dev, GFP_KERNEL, "HiFi Playback"); 83 dr[idx].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port); 84 if (!dr[idx].sink || !dr[idx].source) 85 return -ENOMEM; 86 87 *routes = dr; 88 *num_routes = num_dr; 89 90 return 0; 91 } 92 93 static int avs_max98357a_probe(struct platform_device *pdev) 94 { 95 struct snd_soc_dapm_route *routes; 96 struct snd_soc_dai_link *dai_link; 97 struct snd_soc_acpi_mach *mach; 98 struct snd_soc_card *card; 99 struct device *dev = &pdev->dev; 100 const char *pname; 101 int num_routes, ssp_port, ret; 102 103 mach = dev_get_platdata(dev); 104 pname = mach->mach_params.platform; 105 ssp_port = __ffs(mach->mach_params.i2s_link_mask); 106 107 ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link); 108 if (ret) { 109 dev_err(dev, "Failed to create dai link: %d", ret); 110 return ret; 111 } 112 113 ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes); 114 if (ret) { 115 dev_err(dev, "Failed to create dapm routes: %d", ret); 116 return ret; 117 } 118 119 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 120 if (!card) 121 return -ENOMEM; 122 123 card->name = "avs_max98357a"; 124 card->dev = dev; 125 card->owner = THIS_MODULE; 126 card->dai_link = dai_link; 127 card->num_links = 1; 128 card->controls = card_controls; 129 card->num_controls = ARRAY_SIZE(card_controls); 130 card->dapm_widgets = card_widgets; 131 card->num_dapm_widgets = ARRAY_SIZE(card_widgets); 132 card->dapm_routes = routes; 133 card->num_dapm_routes = num_routes; 134 card->fully_routed = true; 135 136 ret = snd_soc_fixup_dai_links_platform_name(card, pname); 137 if (ret) 138 return ret; 139 140 return devm_snd_soc_register_card(dev, card); 141 } 142 143 static struct platform_driver avs_max98357a_driver = { 144 .probe = avs_max98357a_probe, 145 .driver = { 146 .name = "avs_max98357a", 147 .pm = &snd_soc_pm_ops, 148 }, 149 }; 150 151 module_platform_driver(avs_max98357a_driver) 152 153 MODULE_LICENSE("GPL"); 154 MODULE_ALIAS("platform:avs_max98357a"); 155