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160 lines
4.6 KiB
160 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SiRF audio card driver |
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* |
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* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/gpio.h> |
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#include <linux/of_gpio.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/soc.h> |
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struct sirf_audio_card { |
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unsigned int gpio_hp_pa; |
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unsigned int gpio_spk_pa; |
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}; |
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static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *ctrl, int event) |
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{ |
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struct snd_soc_dapm_context *dapm = w->dapm; |
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struct snd_soc_card *card = dapm->card; |
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struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); |
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int on = !SND_SOC_DAPM_EVENT_OFF(event); |
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if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) |
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gpio_set_value(sirf_audio_card->gpio_hp_pa, on); |
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return 0; |
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} |
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static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *ctrl, int event) |
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{ |
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struct snd_soc_dapm_context *dapm = w->dapm; |
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struct snd_soc_card *card = dapm->card; |
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struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); |
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int on = !SND_SOC_DAPM_EVENT_OFF(event); |
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if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) |
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gpio_set_value(sirf_audio_card->gpio_spk_pa, on); |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event), |
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SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event), |
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SND_SOC_DAPM_MIC("Ext Mic", NULL), |
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}; |
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static const struct snd_soc_dapm_route intercon[] = { |
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{"Hp", NULL, "HPOUTL"}, |
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{"Hp", NULL, "HPOUTR"}, |
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{"Ext Spk", NULL, "SPKOUT"}, |
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{"MICIN1", NULL, "Mic Bias"}, |
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{"Mic Bias", NULL, "Ext Mic"}, |
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}; |
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/* Digital audio interface glue - connects codec <--> CPU */ |
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SND_SOC_DAILINK_DEFS(sirf, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "sirf-audio-codec")), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link sirf_audio_dai_link[] = { |
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{ |
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.name = "SiRF audio card", |
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.stream_name = "SiRF audio HiFi", |
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SND_SOC_DAILINK_REG(sirf), |
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}, |
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}; |
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/* Audio machine driver */ |
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static struct snd_soc_card snd_soc_sirf_audio_card = { |
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.name = "SiRF audio card", |
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.owner = THIS_MODULE, |
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.dai_link = sirf_audio_dai_link, |
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.num_links = ARRAY_SIZE(sirf_audio_dai_link), |
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.dapm_widgets = sirf_audio_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets), |
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.dapm_routes = intercon, |
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.num_dapm_routes = ARRAY_SIZE(intercon), |
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}; |
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static int sirf_audio_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &snd_soc_sirf_audio_card; |
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struct sirf_audio_card *sirf_audio_card; |
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int ret; |
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sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card), |
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GFP_KERNEL); |
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if (sirf_audio_card == NULL) |
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return -ENOMEM; |
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sirf_audio_dai_link[0].cpus->of_node = |
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of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); |
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sirf_audio_dai_link[0].platforms->of_node = |
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of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); |
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sirf_audio_dai_link[0].codecs->of_node = |
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of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0); |
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sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node, |
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"spk-pa-gpios", 0); |
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sirf_audio_card->gpio_hp_pa = of_get_named_gpio(pdev->dev.of_node, |
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"hp-pa-gpios", 0); |
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if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) { |
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ret = devm_gpio_request_one(&pdev->dev, |
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sirf_audio_card->gpio_spk_pa, |
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GPIOF_OUT_INIT_LOW, "SPA_PA_SD"); |
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if (ret) { |
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dev_err(&pdev->dev, |
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"Failed to request GPIO_%d for reset: %d\n", |
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sirf_audio_card->gpio_spk_pa, ret); |
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return ret; |
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} |
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} |
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if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) { |
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ret = devm_gpio_request_one(&pdev->dev, |
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sirf_audio_card->gpio_hp_pa, |
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GPIOF_OUT_INIT_LOW, "HP_PA_SD"); |
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if (ret) { |
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dev_err(&pdev->dev, |
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"Failed to request GPIO_%d for reset: %d\n", |
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sirf_audio_card->gpio_hp_pa, ret); |
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return ret; |
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} |
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} |
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card->dev = &pdev->dev; |
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snd_soc_card_set_drvdata(card, sirf_audio_card); |
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ret = devm_snd_soc_register_card(&pdev->dev, card); |
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if (ret) |
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dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret); |
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return ret; |
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} |
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static const struct of_device_id sirf_audio_of_match[] = { |
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{.compatible = "sirf,sirf-audio-card", }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, sirf_audio_of_match); |
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static struct platform_driver sirf_audio_driver = { |
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.driver = { |
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.name = "sirf-audio-card", |
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.pm = &snd_soc_pm_ops, |
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.of_match_table = sirf_audio_of_match, |
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}, |
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.probe = sirf_audio_probe, |
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}; |
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module_platform_driver(sirf_audio_driver); |
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MODULE_AUTHOR("RongJun Ying <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver"); |
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MODULE_LICENSE("GPL v2");
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