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/i2c.h> 27 #include <linux/of.h> 28 29 #include <linux/atmel-ssc.h> 30 31 #include <sound/core.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/soc.h> 35 36 #include "../codecs/wm8731.h" 37 #include "atmel-pcm.h" 38 #include "atmel_ssc_dai.h" 39 40 #define MCLK_RATE 12000000 41 42 /* 43 * As shipped the board does not have inputs. However, it is relatively 44 * straightforward to modify the board to hook them up so support is left 45 * in the driver. 46 */ 47 #undef ENABLE_MIC_INPUT 48 49 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { 50 SND_SOC_DAPM_MIC("Int Mic", NULL), 51 SND_SOC_DAPM_SPK("Ext Spk", NULL), 52 }; 53 54 static const struct snd_soc_dapm_route intercon[] = { 55 56 /* speaker connected to LHPOUT/RHPOUT */ 57 {"Ext Spk", NULL, "LHPOUT"}, 58 {"Ext Spk", NULL, "RHPOUT"}, 59 60 /* mic is connected to Mic Jack, with WM8731 Mic Bias */ 61 {"MICIN", NULL, "Mic Bias"}, 62 {"Mic Bias", NULL, "Int Mic"}, 63 }; 64 65 /* 66 * Logic for a wm8731 as connected on a at91sam9g20ek board. 67 */ 68 static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) 69 { 70 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); 71 struct device *dev = rtd->dev; 72 int ret; 73 74 dev_dbg(dev, "%s called\n", __func__); 75 76 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, 77 MCLK_RATE, SND_SOC_CLOCK_IN); 78 if (ret < 0) { 79 dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); 80 return ret; 81 } 82 83 #ifndef ENABLE_MIC_INPUT 84 snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); 85 #endif 86 87 return 0; 88 } 89 90 SND_SOC_DAILINK_DEFS(pcm, 91 DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")), 92 DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")), 93 DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0"))); 94 95 static struct snd_soc_dai_link at91sam9g20ek_dai = { 96 .name = "WM8731", 97 .stream_name = "WM8731 PCM", 98 .init = at91sam9g20ek_wm8731_init, 99 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 100 SND_SOC_DAIFMT_CBP_CFP, 101 #ifndef ENABLE_MIC_INPUT 102 .playback_only = true, 103 #endif 104 SND_SOC_DAILINK_REG(pcm), 105 }; 106 107 static struct snd_soc_card snd_soc_at91sam9g20ek = { 108 .name = "AT91SAMG20-EK", 109 .owner = THIS_MODULE, 110 .dai_link = &at91sam9g20ek_dai, 111 .num_links = 1, 112 113 .dapm_widgets = at91sam9g20ek_dapm_widgets, 114 .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), 115 .dapm_routes = intercon, 116 .num_dapm_routes = ARRAY_SIZE(intercon), 117 .fully_routed = true, 118 }; 119 120 static int at91sam9g20ek_audio_probe(struct platform_device *pdev) 121 { 122 struct device_node *np = pdev->dev.of_node; 123 struct device_node *codec_np, *cpu_np; 124 struct snd_soc_card *card = &snd_soc_at91sam9g20ek; 125 int ret; 126 127 if (!np) { 128 return -ENODEV; 129 } 130 131 ret = atmel_ssc_set_audio(0); 132 if (ret) { 133 dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret); 134 return ret; 135 } 136 137 card->dev = &pdev->dev; 138 139 /* Parse device node info */ 140 ret = snd_soc_of_parse_card_name(card, "atmel,model"); 141 if (ret) 142 goto err; 143 144 ret = snd_soc_of_parse_audio_routing(card, 145 "atmel,audio-routing"); 146 if (ret) 147 goto err; 148 149 /* Parse codec info */ 150 at91sam9g20ek_dai.codecs->name = NULL; 151 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); 152 if (!codec_np) { 153 dev_err(&pdev->dev, "codec info missing\n"); 154 ret = -EINVAL; 155 goto err; 156 } 157 at91sam9g20ek_dai.codecs->of_node = codec_np; 158 159 /* Parse dai and platform info */ 160 at91sam9g20ek_dai.cpus->dai_name = NULL; 161 at91sam9g20ek_dai.platforms->name = NULL; 162 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); 163 if (!cpu_np) { 164 dev_err(&pdev->dev, "dai and pcm info missing\n"); 165 of_node_put(codec_np); 166 ret = -EINVAL; 167 goto err; 168 } 169 at91sam9g20ek_dai.cpus->of_node = cpu_np; 170 at91sam9g20ek_dai.platforms->of_node = cpu_np; 171 172 of_node_put(codec_np); 173 of_node_put(cpu_np); 174 175 ret = snd_soc_register_card(card); 176 if (ret) { 177 dev_err_probe(&pdev->dev, ret, 178 "snd_soc_register_card() failed\n"); 179 goto err; 180 } 181 182 return 0; 183 184 err: 185 atmel_ssc_put_audio(0); 186 return ret; 187 } 188 189 static int at91sam9g20ek_audio_remove(struct platform_device *pdev) 190 { 191 struct snd_soc_card *card = platform_get_drvdata(pdev); 192 193 snd_soc_unregister_card(card); 194 atmel_ssc_put_audio(0); 195 196 return 0; 197 } 198 199 #ifdef CONFIG_OF 200 static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { 201 { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, 202 { } 203 }; 204 MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); 205 #endif 206 207 static struct platform_driver at91sam9g20ek_audio_driver = { 208 .driver = { 209 .name = "at91sam9g20ek-audio", 210 .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), 211 }, 212 .probe = at91sam9g20ek_audio_probe, 213 .remove = at91sam9g20ek_audio_remove, 214 }; 215 216 module_platform_driver(at91sam9g20ek_audio_driver); 217 218 /* Module information */ 219 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); 220 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); 221 MODULE_ALIAS("platform:at91sam9g20ek-audio"); 222 MODULE_LICENSE("GPL"); 223