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
sirf_audio_hp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * ctrl,int event)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
sirf_audio_spk_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * ctrl,int event)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
sirf_audio_probe(struct platform_device * pdev)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
