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Linux/sound/soc/sirf/sirf-audio.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * SiRF audio card driver
  4  *
  5  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
  6  */
  7 
  8 #include <linux/platform_device.h>
  9 #include <linux/module.h>
 10 #include <linux/of.h>
 11 #include <linux/gpio.h>
 12 #include <linux/of_gpio.h>
 13 #include <sound/core.h>
 14 #include <sound/pcm.h>
 15 #include <sound/soc.h>
 16 
 17 struct sirf_audio_card {
 18         unsigned int            gpio_hp_pa;
 19         unsigned int            gpio_spk_pa;
 20 };
 21 
 22 static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w,
 23                                 struct snd_kcontrol *ctrl, int event)
 24 {
 25         struct snd_soc_dapm_context *dapm = w->dapm;
 26         struct snd_soc_card *card = dapm->card;
 27         struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
 28         int on = !SND_SOC_DAPM_EVENT_OFF(event);
 29 
 30         if (gpio_is_valid(sirf_audio_card->gpio_hp_pa))
 31                 gpio_set_value(sirf_audio_card->gpio_hp_pa, on);
 32         return 0;
 33 }
 34 
 35 static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w,
 36                                 struct snd_kcontrol *ctrl, int event)
 37 {
 38         struct snd_soc_dapm_context *dapm = w->dapm;
 39         struct snd_soc_card *card = dapm->card;
 40         struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
 41         int on = !SND_SOC_DAPM_EVENT_OFF(event);
 42 
 43         if (gpio_is_valid(sirf_audio_card->gpio_spk_pa))
 44                 gpio_set_value(sirf_audio_card->gpio_spk_pa, on);
 45 
 46         return 0;
 47 }
 48 static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = {
 49         SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event),
 50         SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event),
 51         SND_SOC_DAPM_MIC("Ext Mic", NULL),
 52 };
 53 
 54 static const struct snd_soc_dapm_route intercon[] = {
 55         {"Hp", NULL, "HPOUTL"},
 56         {"Hp", NULL, "HPOUTR"},
 57         {"Ext Spk", NULL, "SPKOUT"},
 58         {"MICIN1", NULL, "Mic Bias"},
 59         {"Mic Bias", NULL, "Ext Mic"},
 60 };
 61 
 62 /* Digital audio interface glue - connects codec <--> CPU */
 63 SND_SOC_DAILINK_DEFS(sirf,
 64         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 65         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "sirf-audio-codec")),
 66         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 67 
 68 static struct snd_soc_dai_link sirf_audio_dai_link[] = {
 69         {
 70                 .name = "SiRF audio card",
 71                 .stream_name = "SiRF audio HiFi",
 72                 SND_SOC_DAILINK_REG(sirf),
 73         },
 74 };
 75 
 76 /* Audio machine driver */
 77 static struct snd_soc_card snd_soc_sirf_audio_card = {
 78         .name = "SiRF audio card",
 79         .owner = THIS_MODULE,
 80         .dai_link = sirf_audio_dai_link,
 81         .num_links = ARRAY_SIZE(sirf_audio_dai_link),
 82         .dapm_widgets = sirf_audio_dapm_widgets,
 83         .num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets),
 84         .dapm_routes = intercon,
 85         .num_dapm_routes = ARRAY_SIZE(intercon),
 86 };
 87 
 88 static int sirf_audio_probe(struct platform_device *pdev)
 89 {
 90         struct snd_soc_card *card = &snd_soc_sirf_audio_card;
 91         struct sirf_audio_card *sirf_audio_card;
 92         int ret;
 93 
 94         sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card),
 95                         GFP_KERNEL);
 96         if (sirf_audio_card == NULL)
 97                 return -ENOMEM;
 98 
 99         sirf_audio_dai_link[0].cpus->of_node =
100                 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
101         sirf_audio_dai_link[0].platforms->of_node =
102                 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
103         sirf_audio_dai_link[0].codecs->of_node =
104                 of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0);
105         sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node,
106                         "spk-pa-gpios", 0);
107         sirf_audio_card->gpio_hp_pa =  of_get_named_gpio(pdev->dev.of_node,
108                         "hp-pa-gpios", 0);
109         if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) {
110                 ret = devm_gpio_request_one(&pdev->dev,
111                                 sirf_audio_card->gpio_spk_pa,
112                                 GPIOF_OUT_INIT_LOW, "SPA_PA_SD");
113                 if (ret) {
114                         dev_err(&pdev->dev,
115                                 "Failed to request GPIO_%d for reset: %d\n",
116                                 sirf_audio_card->gpio_spk_pa, ret);
117                         return ret;
118                 }
119         }
120         if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) {
121                 ret = devm_gpio_request_one(&pdev->dev,
122                                 sirf_audio_card->gpio_hp_pa,
123                                 GPIOF_OUT_INIT_LOW, "HP_PA_SD");
124                 if (ret) {
125                         dev_err(&pdev->dev,
126                                 "Failed to request GPIO_%d for reset: %d\n",
127                                 sirf_audio_card->gpio_hp_pa, ret);
128                         return ret;
129                 }
130         }
131 
132         card->dev = &pdev->dev;
133         snd_soc_card_set_drvdata(card, sirf_audio_card);
134 
135         ret = devm_snd_soc_register_card(&pdev->dev, card);
136         if (ret)
137                 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
138 
139         return ret;
140 }
141 
142 static const struct of_device_id sirf_audio_of_match[] = {
143         {.compatible = "sirf,sirf-audio-card", },
144         { },
145 };
146 MODULE_DEVICE_TABLE(of, sirf_audio_of_match);
147 
148 static struct platform_driver sirf_audio_driver = {
149         .driver = {
150                 .name = "sirf-audio-card",
151                 .pm = &snd_soc_pm_ops,
152                 .of_match_table = sirf_audio_of_match,
153         },
154         .probe = sirf_audio_probe,
155 };
156 module_platform_driver(sirf_audio_driver);
157 
158 MODULE_AUTHOR("RongJun Ying <RongJun.Ying@csr.com>");
159 MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver");
160 MODULE_LICENSE("GPL v2");
161 

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