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 <sound/pcm.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 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port, 17 struct snd_soc_dai_link **dai_link) 18 { 19 struct snd_soc_dai_link_component *platform; 20 struct snd_soc_dai_link *dl; 21 22 dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL); 23 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL); 24 if (!dl || !platform) 25 return -ENOMEM; 26 27 platform->name = platform_name; 28 29 dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port); 30 dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL); 31 if (!dl->name || !dl->cpus) 32 return -ENOMEM; 33 34 dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port); 35 dl->codecs = &asoc_dummy_dlc; 36 if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name) 37 return -ENOMEM; 38 39 dl->num_cpus = 1; 40 dl->num_codecs = 1; 41 dl->platforms = platform; 42 dl->num_platforms = 1; 43 dl->id = 0; 44 dl->nonatomic = 1; 45 dl->no_pcm = 1; 46 dl->dpcm_capture = 1; 47 dl->dpcm_playback = 1; 48 49 *dai_link = dl; 50 51 return 0; 52 } 53 54 static int avs_create_dapm_routes(struct device *dev, int ssp_port, 55 struct snd_soc_dapm_route **routes, int *num_routes) 56 { 57 struct snd_soc_dapm_route *dr; 58 const int num_dr = 2; 59 60 dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL); 61 if (!dr) 62 return -ENOMEM; 63 64 dr[0].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port); 65 dr[0].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port); 66 if (!dr[0].sink || !dr[0].source) 67 return -ENOMEM; 68 69 dr[1].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Rx", ssp_port); 70 dr[1].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port); 71 if (!dr[1].sink || !dr[1].source) 72 return -ENOMEM; 73 74 *routes = dr; 75 *num_routes = num_dr; 76 77 return 0; 78 } 79 80 static int avs_create_dapm_widgets(struct device *dev, int ssp_port, 81 struct snd_soc_dapm_widget **widgets, int *num_widgets) 82 { 83 struct snd_soc_dapm_widget *dw; 84 const int num_dw = 2; 85 86 dw = devm_kcalloc(dev, num_dw, sizeof(*dw), GFP_KERNEL); 87 if (!dw) 88 return -ENOMEM; 89 90 dw[0].id = snd_soc_dapm_hp; 91 dw[0].reg = SND_SOC_NOPM; 92 dw[0].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port); 93 if (!dw[0].name) 94 return -ENOMEM; 95 96 dw[1].id = snd_soc_dapm_mic; 97 dw[1].reg = SND_SOC_NOPM; 98 dw[1].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port); 99 if (!dw[1].name) 100 return -ENOMEM; 101 102 *widgets = dw; 103 *num_widgets = num_dw; 104 105 return 0; 106 } 107 108 static int avs_i2s_test_probe(struct platform_device *pdev) 109 { 110 struct snd_soc_dapm_widget *widgets; 111 struct snd_soc_dapm_route *routes; 112 struct snd_soc_dai_link *dai_link; 113 struct snd_soc_acpi_mach *mach; 114 struct snd_soc_card *card; 115 struct device *dev = &pdev->dev; 116 const char *pname; 117 int num_routes, num_widgets; 118 int ssp_port, ret; 119 120 mach = dev_get_platdata(dev); 121 pname = mach->mach_params.platform; 122 ssp_port = __ffs(mach->mach_params.i2s_link_mask); 123 124 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 125 if (!card) 126 return -ENOMEM; 127 128 card->name = devm_kasprintf(dev, GFP_KERNEL, "ssp%d-loopback", ssp_port); 129 if (!card->name) 130 return -ENOMEM; 131 132 ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link); 133 if (ret) { 134 dev_err(dev, "Failed to create dai link: %d\n", ret); 135 return ret; 136 } 137 138 ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes); 139 if (ret) { 140 dev_err(dev, "Failed to create dapm routes: %d\n", ret); 141 return ret; 142 } 143 144 ret = avs_create_dapm_widgets(dev, ssp_port, &widgets, &num_widgets); 145 if (ret) { 146 dev_err(dev, "Failed to create dapm widgets: %d\n", ret); 147 return ret; 148 } 149 150 card->dev = dev; 151 card->owner = THIS_MODULE; 152 card->dai_link = dai_link; 153 card->num_links = 1; 154 card->dapm_routes = routes; 155 card->num_dapm_routes = num_routes; 156 card->dapm_widgets = widgets; 157 card->num_dapm_widgets = num_widgets; 158 card->fully_routed = true; 159 160 ret = snd_soc_fixup_dai_links_platform_name(card, pname); 161 if (ret) 162 return ret; 163 164 return devm_snd_soc_register_card(dev, card); 165 } 166 167 static struct platform_driver avs_i2s_test_driver = { 168 .probe = avs_i2s_test_probe, 169 .driver = { 170 .name = "avs_i2s_test", 171 .pm = &snd_soc_pm_ops, 172 }, 173 }; 174 175 module_platform_driver(avs_i2s_test_driver); 176 177 MODULE_LICENSE("GPL"); 178 MODULE_ALIAS("platform:avs_i2s_test"); 179