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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based4 * ATMEL AT91SAM9G20ek board.5 *6 * Copyright (C) 2005 SAN People7 * Copyright (C) 2008 Atmel8 *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 1200000040 41/*42 * As shipped the board does not have inputs. However, it is relatively43 * straightforward to modify the board to hook them up so support is left44 * in the driver.45 */46#undef ENABLE_MIC_INPUT47 48static 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 53static 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 */67static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)68{69 struct snd_soc_dai *codec_dai = snd_soc_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_INPUT83 snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");84#endif85 86 return 0;87}88 89SND_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 94static 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_INPUT101 .playback_only = true,102#endif103 SND_SOC_DAILINK_REG(pcm),104};105 106static 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 119static 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 183err:184 atmel_ssc_put_audio(0);185 return ret;186}187 188static 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_OF197static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {198 { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },199 { }200};201MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);202#endif203 204static 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 = at91sam9g20ek_audio_remove,211};212 213module_platform_driver(at91sam9g20ek_audio_driver);214 215/* Module information */216MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");217MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");218MODULE_ALIAS("platform:at91sam9g20ek-audio");219MODULE_LICENSE("GPL");220