1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // 10 11 #include <linux/module.h> 12 #include <sound/sof.h> 13 #include "sof-audio.h" 14 #include "sof-priv.h" 15 16 static struct snd_soc_card sof_nocodec_card = { 17 .name = "nocodec", /* the sof- prefix is added by the core */ 18 .topology_shortname = "sof-nocodec", 19 .owner = THIS_MODULE 20 }; 21 22 static int sof_nocodec_bes_setup(struct device *dev, 23 struct snd_soc_dai_driver *drv, 24 struct snd_soc_dai_link *links, 25 int link_num, struct snd_soc_card *card) 26 { 27 struct snd_soc_dai_link_component *dlc; 28 int i; 29 30 if (!drv || !links || !card) 31 return -EINVAL; 32 33 /* set up BE dai_links */ 34 for (i = 0; i < link_num; i++) { 35 dlc = devm_kcalloc(dev, 3, sizeof(*dlc), GFP_KERNEL); 36 if (!dlc) 37 return -ENOMEM; 38 39 links[i].name = devm_kasprintf(dev, GFP_KERNEL, 40 "NoCodec-%d", i); 41 if (!links[i].name) 42 return -ENOMEM; 43 44 links[i].stream_name = links[i].name; 45 46 links[i].cpus = &dlc[0]; 47 links[i].codecs = &dlc[1]; 48 links[i].platforms = &dlc[2]; 49 50 links[i].num_cpus = 1; 51 links[i].num_codecs = 1; 52 links[i].num_platforms = 1; 53 54 links[i].id = i; 55 links[i].no_pcm = 1; 56 links[i].cpus->dai_name = drv[i].name; 57 links[i].platforms->name = dev_name(dev->parent); 58 links[i].codecs->dai_name = "snd-soc-dummy-dai"; 59 links[i].codecs->name = "snd-soc-dummy"; 60 if (drv[i].playback.channels_min) 61 links[i].dpcm_playback = 1; 62 if (drv[i].capture.channels_min) 63 links[i].dpcm_capture = 1; 64 65 links[i].be_hw_params_fixup = sof_pcm_dai_link_fixup; 66 } 67 68 card->dai_link = links; 69 card->num_links = link_num; 70 71 return 0; 72 } 73 74 static int sof_nocodec_setup(struct device *dev, 75 u32 num_dai_drivers, 76 struct snd_soc_dai_driver *dai_drivers) 77 { 78 struct snd_soc_dai_link *links; 79 80 /* create dummy BE dai_links */ 81 links = devm_kcalloc(dev, num_dai_drivers, sizeof(struct snd_soc_dai_link), GFP_KERNEL); 82 if (!links) 83 return -ENOMEM; 84 85 return sof_nocodec_bes_setup(dev, dai_drivers, links, num_dai_drivers, &sof_nocodec_card); 86 } 87 88 static int sof_nocodec_probe(struct platform_device *pdev) 89 { 90 struct snd_soc_card *card = &sof_nocodec_card; 91 struct snd_soc_acpi_mach *mach; 92 int ret; 93 94 card->dev = &pdev->dev; 95 card->topology_shortname_created = true; 96 mach = pdev->dev.platform_data; 97 98 ret = sof_nocodec_setup(card->dev, mach->mach_params.num_dai_drivers, 99 mach->mach_params.dai_drivers); 100 if (ret < 0) 101 return ret; 102 103 return devm_snd_soc_register_card(&pdev->dev, card); 104 } 105 106 static int sof_nocodec_remove(struct platform_device *pdev) 107 { 108 return 0; 109 } 110 111 static struct platform_driver sof_nocodec_audio = { 112 .probe = sof_nocodec_probe, 113 .remove = sof_nocodec_remove, 114 .driver = { 115 .name = "sof-nocodec", 116 .pm = &snd_soc_pm_ops, 117 }, 118 }; 119 module_platform_driver(sof_nocodec_audio) 120 121 MODULE_DESCRIPTION("ASoC sof nocodec"); 122 MODULE_AUTHOR("Liam Girdwood"); 123 MODULE_LICENSE("Dual BSD/GPL"); 124 MODULE_ALIAS("platform:sof-nocodec"); 125