1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards 4 * that are using WM8731 as codec. 5 * 6 * Copyright (C) 2011 Atmel, 7 * Nicolas Ferre <nicolas.ferre@atmel.com> 8 * 9 * Copyright (C) 2013 Paratronic, 10 * Richard Genoud <richard.genoud@gmail.com> 11 * 12 * Based on sam9g20_wm8731.c by: 13 * Sedji Gaouaou <sedji.gaouaou@atmel.com> 14 */ 15 #include <linux/of.h> 16 #include <linux/export.h> 17 #include <linux/module.h> 18 #include <linux/mod_devicetable.h> 19 #include <linux/platform_device.h> 20 #include <linux/device.h> 21 22 #include <sound/soc.h> 23 #include <sound/soc-dai.h> 24 #include <sound/soc-dapm.h> 25 26 #include "../codecs/wm8731.h" 27 #include "atmel_ssc_dai.h" 28 29 30 #define MCLK_RATE 12288000 31 32 #define DRV_NAME "sam9x5-snd-wm8731" 33 34 struct sam9x5_drvdata { 35 int ssc_id; 36 }; 37 38 /* 39 * Logic for a wm8731 as connected on a at91sam9x5ek based board. 40 */ 41 static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd) 42 { 43 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 44 struct device *dev = rtd->dev; 45 int ret; 46 47 dev_dbg(dev, "%s called\n", __func__); 48 49 /* set the codec system clock for DAC and ADC */ 50 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, 51 MCLK_RATE, SND_SOC_CLOCK_IN); 52 if (ret < 0) { 53 dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); 54 return ret; 55 } 56 57 return 0; 58 } 59 60 /* 61 * Audio paths on at91sam9x5ek board: 62 * 63 * |A| ------------> | | ---R----> Headphone Jack 64 * |T| <----\ | WM | ---L--/ 65 * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack 66 * |1| <------------ | | <--L--/ 67 */ 68 static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = { 69 SND_SOC_DAPM_HP("Headphone Jack", NULL), 70 SND_SOC_DAPM_LINE("Line In Jack", NULL), 71 }; 72 73 static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) 74 { 75 struct device_node *np = pdev->dev.of_node; 76 struct device_node *codec_np, *cpu_np; 77 struct snd_soc_card *card; 78 struct snd_soc_dai_link *dai; 79 struct sam9x5_drvdata *priv; 80 struct snd_soc_dai_link_component *comp; 81 int ret; 82 83 if (!np) { 84 dev_err(&pdev->dev, "No device node supplied\n"); 85 return -EINVAL; 86 } 87 88 card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); 89 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 90 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); 91 comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL); 92 if (!dai || !card || !priv || !comp) { 93 ret = -ENOMEM; 94 goto out; 95 } 96 97 snd_soc_card_set_drvdata(card, priv); 98 99 card->dev = &pdev->dev; 100 card->owner = THIS_MODULE; 101 card->dai_link = dai; 102 card->num_links = 1; 103 card->dapm_widgets = sam9x5_dapm_widgets; 104 card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets); 105 106 dai->cpus = &comp[0]; 107 dai->num_cpus = 1; 108 dai->codecs = &comp[1]; 109 dai->num_codecs = 1; 110 dai->platforms = &comp[2]; 111 dai->num_platforms = 1; 112 113 dai->name = "WM8731"; 114 dai->stream_name = "WM8731 PCM"; 115 dai->codecs->dai_name = "wm8731-hifi"; 116 dai->init = sam9x5_wm8731_init; 117 dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF 118 | SND_SOC_DAIFMT_CBP_CFP; 119 120 ret = snd_soc_of_parse_card_name(card, "atmel,model"); 121 if (ret) { 122 dev_err(&pdev->dev, "atmel,model node missing\n"); 123 goto out; 124 } 125 126 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); 127 if (ret) { 128 dev_err(&pdev->dev, "atmel,audio-routing node missing\n"); 129 goto out; 130 } 131 132 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); 133 if (!codec_np) { 134 dev_err(&pdev->dev, "atmel,audio-codec node missing\n"); 135 ret = -EINVAL; 136 goto out; 137 } 138 139 dai->codecs->of_node = codec_np; 140 141 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); 142 if (!cpu_np) { 143 dev_err(&pdev->dev, "atmel,ssc-controller node missing\n"); 144 ret = -EINVAL; 145 goto out_put_codec_np; 146 } 147 dai->cpus->of_node = cpu_np; 148 dai->platforms->of_node = cpu_np; 149 150 priv->ssc_id = of_alias_get_id(cpu_np, "ssc"); 151 152 ret = atmel_ssc_set_audio(priv->ssc_id); 153 if (ret != 0) { 154 dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n", 155 ret, priv->ssc_id); 156 goto out_put_cpu_np; 157 } 158 159 ret = devm_snd_soc_register_card(&pdev->dev, card); 160 if (ret) { 161 dev_err(&pdev->dev, "Platform device allocation failed\n"); 162 goto out_put_audio; 163 } 164 165 dev_dbg(&pdev->dev, "%s ok\n", __func__); 166 167 goto out_put_cpu_np; 168 169 out_put_audio: 170 atmel_ssc_put_audio(priv->ssc_id); 171 out_put_cpu_np: 172 of_node_put(cpu_np); 173 out_put_codec_np: 174 of_node_put(codec_np); 175 out: 176 return ret; 177 } 178 179 static void sam9x5_wm8731_driver_remove(struct platform_device *pdev) 180 { 181 struct snd_soc_card *card = platform_get_drvdata(pdev); 182 struct sam9x5_drvdata *priv = card->drvdata; 183 184 atmel_ssc_put_audio(priv->ssc_id); 185 } 186 187 static const struct of_device_id sam9x5_wm8731_of_match[] = { 188 { .compatible = "atmel,sam9x5-wm8731-audio", }, 189 {}, 190 }; 191 MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); 192 193 static struct platform_driver sam9x5_wm8731_driver = { 194 .driver = { 195 .name = DRV_NAME, 196 .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), 197 }, 198 .probe = sam9x5_wm8731_driver_probe, 199 .remove_new = sam9x5_wm8731_driver_remove, 200 }; 201 module_platform_driver(sam9x5_wm8731_driver); 202 203 /* Module information */ 204 MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); 205 MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>"); 206 MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); 207 MODULE_LICENSE("GPL"); 208 MODULE_ALIAS("platform:" DRV_NAME); 209