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![Mark Brown](/assets/img/avatar_default.png)
Without modification the AT91SAM9G20-EK has no capture support, none of the inputs of the CODEC are wired to anything to useful and there are no paths supporting loopback. Since the audio is clocked from the CODEC and the DAPM inputs are marked as unusable this means that capture will fail to transfer any data as the ADC path can't be powered up. Flag this in the device description so apps don't see unusable capture support, guarded with the existing optional define for mic input. Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230225-asoc-sam9g20ek-v1-1-9baeb4893142@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
222 lines
5.3 KiB
C
222 lines
5.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
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* ATMEL AT91SAM9G20ek board.
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*
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* Copyright (C) 2005 SAN People
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* Copyright (C) 2008 Atmel
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*
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* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
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*
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* Based on ati_b1_wm8731.c by:
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* Frank Mandarino <fmandarino@endrelia.com>
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* Copyright 2006 Endrelia Technologies Inc.
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* Based on corgi.c by:
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Copyright 2005 Openedhand Ltd.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/clk.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/of.h>
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#include <linux/atmel-ssc.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "../codecs/wm8731.h"
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#include "atmel-pcm.h"
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#include "atmel_ssc_dai.h"
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#define MCLK_RATE 12000000
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/*
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* As shipped the board does not have inputs. However, it is relatively
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* straightforward to modify the board to hook them up so support is left
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* in the driver.
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*/
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#undef ENABLE_MIC_INPUT
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static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
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SND_SOC_DAPM_MIC("Int Mic", NULL),
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SND_SOC_DAPM_SPK("Ext Spk", NULL),
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};
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static const struct snd_soc_dapm_route intercon[] = {
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/* speaker connected to LHPOUT/RHPOUT */
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{"Ext Spk", NULL, "LHPOUT"},
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{"Ext Spk", NULL, "RHPOUT"},
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/* mic is connected to Mic Jack, with WM8731 Mic Bias */
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{"MICIN", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Int Mic"},
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};
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/*
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* Logic for a wm8731 as connected on a at91sam9g20ek board.
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*/
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static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct device *dev = rtd->dev;
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int ret;
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dev_dbg(dev, "%s called\n", __func__);
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
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MCLK_RATE, SND_SOC_CLOCK_IN);
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if (ret < 0) {
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dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
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return ret;
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}
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#ifndef ENABLE_MIC_INPUT
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snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
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#endif
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return 0;
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}
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SND_SOC_DAILINK_DEFS(pcm,
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DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")),
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DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
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DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0")));
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static struct snd_soc_dai_link at91sam9g20ek_dai = {
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.name = "WM8731",
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.stream_name = "WM8731 PCM",
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.init = at91sam9g20ek_wm8731_init,
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBP_CFP,
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#ifndef ENABLE_MIC_INPUT
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.playback_only = true,
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#endif
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SND_SOC_DAILINK_REG(pcm),
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};
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static struct snd_soc_card snd_soc_at91sam9g20ek = {
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.name = "AT91SAMG20-EK",
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.owner = THIS_MODULE,
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.dai_link = &at91sam9g20ek_dai,
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.num_links = 1,
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.dapm_widgets = at91sam9g20ek_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
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.dapm_routes = intercon,
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.num_dapm_routes = ARRAY_SIZE(intercon),
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.fully_routed = true,
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};
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static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct device_node *codec_np, *cpu_np;
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struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
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int ret;
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if (!np) {
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return -ENODEV;
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}
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ret = atmel_ssc_set_audio(0);
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if (ret) {
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dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret);
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return ret;
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}
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card->dev = &pdev->dev;
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/* Parse device node info */
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ret = snd_soc_of_parse_card_name(card, "atmel,model");
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if (ret)
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goto err;
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ret = snd_soc_of_parse_audio_routing(card,
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"atmel,audio-routing");
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if (ret)
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goto err;
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/* Parse codec info */
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at91sam9g20ek_dai.codecs->name = NULL;
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codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
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if (!codec_np) {
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dev_err(&pdev->dev, "codec info missing\n");
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ret = -EINVAL;
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goto err;
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}
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at91sam9g20ek_dai.codecs->of_node = codec_np;
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/* Parse dai and platform info */
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at91sam9g20ek_dai.cpus->dai_name = NULL;
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at91sam9g20ek_dai.platforms->name = NULL;
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cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
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if (!cpu_np) {
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dev_err(&pdev->dev, "dai and pcm info missing\n");
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of_node_put(codec_np);
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ret = -EINVAL;
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goto err;
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}
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at91sam9g20ek_dai.cpus->of_node = cpu_np;
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at91sam9g20ek_dai.platforms->of_node = cpu_np;
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of_node_put(codec_np);
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of_node_put(cpu_np);
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err_probe(&pdev->dev, ret,
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"snd_soc_register_card() failed\n");
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goto err;
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}
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return 0;
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err:
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atmel_ssc_put_audio(0);
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return ret;
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}
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static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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snd_soc_unregister_card(card);
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atmel_ssc_put_audio(0);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
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{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
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#endif
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static struct platform_driver at91sam9g20ek_audio_driver = {
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.driver = {
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.name = "at91sam9g20ek-audio",
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.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
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},
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.probe = at91sam9g20ek_audio_probe,
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.remove = at91sam9g20ek_audio_remove,
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};
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module_platform_driver(at91sam9g20ek_audio_driver);
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/* Module information */
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MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
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MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
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MODULE_ALIAS("platform:at91sam9g20ek-audio");
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MODULE_LICENSE("GPL");
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