1 // SPDX-License-Identifier: GPL-2.0+ 2 // Copyright 2017-2020 NXP 3 4 #include <linux/module.h> 5 #include <linux/of_platform.h> 6 #include <linux/of_reserved_mem.h> 7 #include <linux/i2c.h> 8 #include <linux/of_gpio.h> 9 #include <linux/slab.h> 10 #include <linux/gpio.h> 11 #include <linux/clk.h> 12 #include <sound/soc.h> 13 #include <sound/jack.h> 14 #include <sound/control.h> 15 #include <sound/pcm_params.h> 16 #include <sound/soc-dapm.h> 17 #include "imx-pcm-rpmsg.h" 18 19 struct imx_rpmsg { 20 struct snd_soc_dai_link dai; 21 struct snd_soc_card card; 22 }; 23 24 static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = { 25 SND_SOC_DAPM_HP("Headphone Jack", NULL), 26 SND_SOC_DAPM_SPK("Ext Spk", NULL), 27 SND_SOC_DAPM_MIC("Mic Jack", NULL), 28 SND_SOC_DAPM_MIC("Main MIC", NULL), 29 }; 30 31 static int imx_rpmsg_probe(struct platform_device *pdev) 32 { 33 struct snd_soc_dai_link_component *dlc; 34 struct device *dev = pdev->dev.parent; 35 /* rpmsg_pdev is the platform device for the rpmsg node that probed us */ 36 struct platform_device *rpmsg_pdev = to_platform_device(dev); 37 struct device_node *np = rpmsg_pdev->dev.of_node; 38 struct of_phandle_args args; 39 struct imx_rpmsg *data; 40 int ret = 0; 41 42 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL); 43 if (!dlc) 44 return -ENOMEM; 45 46 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 47 if (!data) { 48 ret = -ENOMEM; 49 goto fail; 50 } 51 52 ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0); 53 if (ret) 54 dev_warn(&pdev->dev, "no reserved DMA memory\n"); 55 56 data->dai.cpus = &dlc[0]; 57 data->dai.num_cpus = 1; 58 data->dai.platforms = &dlc[1]; 59 data->dai.num_platforms = 1; 60 data->dai.codecs = &dlc[2]; 61 data->dai.num_codecs = 1; 62 63 data->dai.name = "rpmsg hifi"; 64 data->dai.stream_name = "rpmsg hifi"; 65 data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | 66 SND_SOC_DAIFMT_NB_NF | 67 SND_SOC_DAIFMT_CBS_CFS; 68 69 /* Optional codec node */ 70 ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args); 71 if (ret) { 72 data->dai.codecs->dai_name = "snd-soc-dummy-dai"; 73 data->dai.codecs->name = "snd-soc-dummy"; 74 } else { 75 data->dai.codecs->of_node = args.np; 76 ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name); 77 if (ret) { 78 dev_err(&pdev->dev, "Unable to get codec_dai_name\n"); 79 goto fail; 80 } 81 } 82 83 data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev); 84 data->dai.platforms->name = IMX_PCM_DRV_NAME; 85 data->dai.playback_only = true; 86 data->dai.capture_only = true; 87 data->card.num_links = 1; 88 data->card.dai_link = &data->dai; 89 90 if (of_property_read_bool(np, "fsl,rpmsg-out")) 91 data->dai.capture_only = false; 92 93 if (of_property_read_bool(np, "fsl,rpmsg-in")) 94 data->dai.playback_only = false; 95 96 if (data->dai.playback_only && data->dai.capture_only) { 97 dev_err(&pdev->dev, "no enabled rpmsg DAI link\n"); 98 ret = -EINVAL; 99 goto fail; 100 } 101 102 data->card.dev = &pdev->dev; 103 data->card.owner = THIS_MODULE; 104 data->card.dapm_widgets = imx_rpmsg_dapm_widgets; 105 data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets); 106 /* 107 * Inoder to use common api to get card name and audio routing. 108 * Use parent of_node for this device, revert it after finishing using 109 */ 110 data->card.dev->of_node = np; 111 112 ret = snd_soc_of_parse_card_name(&data->card, "model"); 113 if (ret) 114 goto fail; 115 116 if (of_property_read_bool(np, "audio-routing")) { 117 ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing"); 118 if (ret) { 119 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret); 120 goto fail; 121 } 122 } 123 124 platform_set_drvdata(pdev, &data->card); 125 snd_soc_card_set_drvdata(&data->card, data); 126 ret = devm_snd_soc_register_card(&pdev->dev, &data->card); 127 if (ret) { 128 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n"); 129 goto fail; 130 } 131 132 fail: 133 pdev->dev.of_node = NULL; 134 return ret; 135 } 136 137 static struct platform_driver imx_rpmsg_driver = { 138 .driver = { 139 .name = "imx-audio-rpmsg", 140 .pm = &snd_soc_pm_ops, 141 }, 142 .probe = imx_rpmsg_probe, 143 }; 144 module_platform_driver(imx_rpmsg_driver); 145 146 MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver"); 147 MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>"); 148 MODULE_ALIAS("platform:imx-audio-rpmsg"); 149 MODULE_LICENSE("GPL v2"); 150