1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based 4 * ATMEL AT91SAM9G20ek board. 5 * 6 * Copyright (C) 2005 SAN People 7 * Copyright (C) 2008 Atmel 8 * 9 * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> 10 * 11 * Based on ati_b1_wm8731.c by: 12 * Frank Mandarino <fmandarino@endrelia.com> 13 * Copyright 2006 Endrelia Technologies Inc. 14 * Based on corgi.c by: 15 * Copyright 2005 Wolfson Microelectronics PLC. 16 * Copyright 2005 Openedhand Ltd. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/moduleparam.h> 21 #include <linux/kernel.h> 22 #include <linux/clk.h> 23 #include <linux/timer.h> 24 #include <linux/interrupt.h> 25 #include <linux/platform_device.h> 26 #include <linux/of.h> 27 28 #include <linux/atmel-ssc.h> 29 30 #include <sound/core.h> 31 #include <sound/pcm.h> 32 #include <sound/pcm_params.h> 33 #include <sound/soc.h> 34 35 #include "../codecs/wm8731.h" 36 #include "atmel-pcm.h" 37 #include "atmel_ssc_dai.h" 38 39 #define MCLK_RATE 12000000 40 41 /* 42 * As shipped the board does not have inputs. However, it is relatively 43 * straightforward to modify the board to hook them up so support is left 44 * in the driver. 45 */ 46 #undef ENABLE_MIC_INPUT 47 48 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { 49 SND_SOC_DAPM_MIC("Int Mic", NULL), 50 SND_SOC_DAPM_SPK("Ext Spk", NULL), 51 }; 52 53 static const struct snd_soc_dapm_route intercon[] = { 54 55 /* speaker connected to LHPOUT/RHPOUT */ 56 {"Ext Spk", NULL, "LHPOUT"}, 57 {"Ext Spk", NULL, "RHPOUT"}, 58 59 /* mic is connected to Mic Jack, with WM8731 Mic Bias */ 60 {"MICIN", NULL, "Mic Bias"}, 61 {"Mic Bias", NULL, "Int Mic"}, 62 }; 63 64 /* 65 * Logic for a wm8731 as connected on a at91sam9g20ek board. 66 */ 67 static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) 68 { 69 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 70 struct device *dev = rtd->dev; 71 int ret; 72 73 dev_dbg(dev, "%s called\n", __func__); 74 75 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, 76 MCLK_RATE, SND_SOC_CLOCK_IN); 77 if (ret < 0) { 78 dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); 79 return ret; 80 } 81 82 #ifndef ENABLE_MIC_INPUT 83 snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); 84 #endif 85 86 return 0; 87 } 88 89 SND_SOC_DAILINK_DEFS(pcm, 90 DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")), 91 DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")), 92 DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0"))); 93 94 static struct snd_soc_dai_link at91sam9g20ek_dai = { 95 .name = "WM8731", 96 .stream_name = "WM8731 PCM", 97 .init = at91sam9g20ek_wm8731_init, 98 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 99 SND_SOC_DAIFMT_CBP_CFP, 100 #ifndef ENABLE_MIC_INPUT 101 .playback_only = true, 102 #endif 103 SND_SOC_DAILINK_REG(pcm), 104 }; 105 106 static struct snd_soc_card snd_soc_at91sam9g20ek = { 107 .name = "AT91SAMG20-EK", 108 .owner = THIS_MODULE, 109 .dai_link = &at91sam9g20ek_dai, 110 .num_links = 1, 111 112 .dapm_widgets = at91sam9g20ek_dapm_widgets, 113 .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), 114 .dapm_routes = intercon, 115 .num_dapm_routes = ARRAY_SIZE(intercon), 116 .fully_routed = true, 117 }; 118 119 static int at91sam9g20ek_audio_probe(struct platform_device *pdev) 120 { 121 struct device_node *np = pdev->dev.of_node; 122 struct device_node *codec_np, *cpu_np; 123 struct snd_soc_card *card = &snd_soc_at91sam9g20ek; 124 int ret; 125 126 if (!np) { 127 return -ENODEV; 128 } 129 130 ret = atmel_ssc_set_audio(0); 131 if (ret) { 132 dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret); 133 return ret; 134 } 135 136 card->dev = &pdev->dev; 137 138 /* Parse device node info */ 139 ret = snd_soc_of_parse_card_name(card, "atmel,model"); 140 if (ret) 141 goto err; 142 143 ret = snd_soc_of_parse_audio_routing(card, 144 "atmel,audio-routing"); 145 if (ret) 146 goto err; 147 148 /* Parse codec info */ 149 at91sam9g20ek_dai.codecs->name = NULL; 150 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); 151 if (!codec_np) { 152 dev_err(&pdev->dev, "codec info missing\n"); 153 ret = -EINVAL; 154 goto err; 155 } 156 at91sam9g20ek_dai.codecs->of_node = codec_np; 157 158 /* Parse dai and platform info */ 159 at91sam9g20ek_dai.cpus->dai_name = NULL; 160 at91sam9g20ek_dai.platforms->name = NULL; 161 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); 162 if (!cpu_np) { 163 dev_err(&pdev->dev, "dai and pcm info missing\n"); 164 of_node_put(codec_np); 165 ret = -EINVAL; 166 goto err; 167 } 168 at91sam9g20ek_dai.cpus->of_node = cpu_np; 169 at91sam9g20ek_dai.platforms->of_node = cpu_np; 170 171 of_node_put(codec_np); 172 of_node_put(cpu_np); 173 174 ret = snd_soc_register_card(card); 175 if (ret) { 176 dev_err_probe(&pdev->dev, ret, 177 "snd_soc_register_card() failed\n"); 178 goto err; 179 } 180 181 return 0; 182 183 err: 184 atmel_ssc_put_audio(0); 185 return ret; 186 } 187 188 static void at91sam9g20ek_audio_remove(struct platform_device *pdev) 189 { 190 struct snd_soc_card *card = platform_get_drvdata(pdev); 191 192 snd_soc_unregister_card(card); 193 atmel_ssc_put_audio(0); 194 } 195 196 #ifdef CONFIG_OF 197 static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { 198 { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, 199 { } 200 }; 201 MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); 202 #endif 203 204 static struct platform_driver at91sam9g20ek_audio_driver = { 205 .driver = { 206 .name = "at91sam9g20ek-audio", 207 .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), 208 }, 209 .probe = at91sam9g20ek_audio_probe, 210 .remove_new = at91sam9g20ek_audio_remove, 211 }; 212 213 module_platform_driver(at91sam9g20ek_audio_driver); 214 215 /* Module information */ 216 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); 217 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); 218 MODULE_ALIAS("platform:at91sam9g20ek-audio"); 219 MODULE_LICENSE("GPL"); 220