1 /*
2 * SiRF audio card driver
3 *
4 * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
5 *
6 * Licensed under GPLv2 or later.
7 */
8
9 #include <linux/platform_device.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/gpio.h>
13 #include <linux/of_gpio.h>
14 #include <sound/core.h>
15 #include <sound/pcm.h>
16 #include <sound/soc.h>
17
18 struct sirf_audio_card {
19 unsigned int gpio_hp_pa;
20 unsigned int gpio_spk_pa;
21 };
22
sirf_audio_hp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * ctrl,int event)23 static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w,
24 struct snd_kcontrol *ctrl, int event)
25 {
26 struct snd_soc_dapm_context *dapm = w->dapm;
27 struct snd_soc_card *card = dapm->card;
28 struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
29 int on = !SND_SOC_DAPM_EVENT_OFF(event);
30
31 if (gpio_is_valid(sirf_audio_card->gpio_hp_pa))
32 gpio_set_value(sirf_audio_card->gpio_hp_pa, on);
33 return 0;
34 }
35
sirf_audio_spk_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * ctrl,int event)36 static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w,
37 struct snd_kcontrol *ctrl, int event)
38 {
39 struct snd_soc_dapm_context *dapm = w->dapm;
40 struct snd_soc_card *card = dapm->card;
41 struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
42 int on = !SND_SOC_DAPM_EVENT_OFF(event);
43
44 if (gpio_is_valid(sirf_audio_card->gpio_spk_pa))
45 gpio_set_value(sirf_audio_card->gpio_spk_pa, on);
46
47 return 0;
48 }
49 static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = {
50 SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event),
51 SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event),
52 SND_SOC_DAPM_MIC("Ext Mic", NULL),
53 };
54
55 static const struct snd_soc_dapm_route intercon[] = {
56 {"Hp", NULL, "HPOUTL"},
57 {"Hp", NULL, "HPOUTR"},
58 {"Ext Spk", NULL, "SPKOUT"},
59 {"MICIN1", NULL, "Mic Bias"},
60 {"Mic Bias", NULL, "Ext Mic"},
61 };
62
63 /* Digital audio interface glue - connects codec <--> CPU */
64 static struct snd_soc_dai_link sirf_audio_dai_link[] = {
65 {
66 .name = "SiRF audio card",
67 .stream_name = "SiRF audio HiFi",
68 .codec_dai_name = "sirf-audio-codec",
69 },
70 };
71
72 /* Audio machine driver */
73 static struct snd_soc_card snd_soc_sirf_audio_card = {
74 .name = "SiRF audio card",
75 .owner = THIS_MODULE,
76 .dai_link = sirf_audio_dai_link,
77 .num_links = ARRAY_SIZE(sirf_audio_dai_link),
78 .dapm_widgets = sirf_audio_dapm_widgets,
79 .num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets),
80 .dapm_routes = intercon,
81 .num_dapm_routes = ARRAY_SIZE(intercon),
82 };
83
sirf_audio_probe(struct platform_device * pdev)84 static int sirf_audio_probe(struct platform_device *pdev)
85 {
86 struct snd_soc_card *card = &snd_soc_sirf_audio_card;
87 struct sirf_audio_card *sirf_audio_card;
88 int ret;
89
90 sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card),
91 GFP_KERNEL);
92 if (sirf_audio_card == NULL)
93 return -ENOMEM;
94
95 sirf_audio_dai_link[0].cpu_of_node =
96 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
97 sirf_audio_dai_link[0].platform_of_node =
98 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
99 sirf_audio_dai_link[0].codec_of_node =
100 of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0);
101 sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node,
102 "spk-pa-gpios", 0);
103 sirf_audio_card->gpio_hp_pa = of_get_named_gpio(pdev->dev.of_node,
104 "hp-pa-gpios", 0);
105 if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) {
106 ret = devm_gpio_request_one(&pdev->dev,
107 sirf_audio_card->gpio_spk_pa,
108 GPIOF_OUT_INIT_LOW, "SPA_PA_SD");
109 if (ret) {
110 dev_err(&pdev->dev,
111 "Failed to request GPIO_%d for reset: %d\n",
112 sirf_audio_card->gpio_spk_pa, ret);
113 return ret;
114 }
115 }
116 if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) {
117 ret = devm_gpio_request_one(&pdev->dev,
118 sirf_audio_card->gpio_hp_pa,
119 GPIOF_OUT_INIT_LOW, "HP_PA_SD");
120 if (ret) {
121 dev_err(&pdev->dev,
122 "Failed to request GPIO_%d for reset: %d\n",
123 sirf_audio_card->gpio_hp_pa, ret);
124 return ret;
125 }
126 }
127
128 card->dev = &pdev->dev;
129 snd_soc_card_set_drvdata(card, sirf_audio_card);
130
131 ret = devm_snd_soc_register_card(&pdev->dev, card);
132 if (ret)
133 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
134
135 return ret;
136 }
137
138 static const struct of_device_id sirf_audio_of_match[] = {
139 {.compatible = "sirf,sirf-audio-card", },
140 { },
141 };
142 MODULE_DEVICE_TABLE(of, sirf_audio_of_match);
143
144 static struct platform_driver sirf_audio_driver = {
145 .driver = {
146 .name = "sirf-audio-card",
147 .pm = &snd_soc_pm_ops,
148 .of_match_table = sirf_audio_of_match,
149 },
150 .probe = sirf_audio_probe,
151 };
152 module_platform_driver(sirf_audio_driver);
153
154 MODULE_AUTHOR("RongJun Ying <RongJun.Ying@csr.com>");
155 MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver");
156 MODULE_LICENSE("GPL v2");
157