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 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 static struct snd_soc_dai_link sirf_audio_dai_link[] = {
64 {
65 .name = "SiRF audio card",
66 .stream_name = "SiRF audio HiFi",
67 .codec_dai_name = "sirf-audio-codec",
68 },
69 };
70
71 /* Audio machine driver */
72 static struct snd_soc_card snd_soc_sirf_audio_card = {
73 .name = "SiRF audio card",
74 .owner = THIS_MODULE,
75 .dai_link = sirf_audio_dai_link,
76 .num_links = ARRAY_SIZE(sirf_audio_dai_link),
77 .dapm_widgets = sirf_audio_dapm_widgets,
78 .num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets),
79 .dapm_routes = intercon,
80 .num_dapm_routes = ARRAY_SIZE(intercon),
81 };
82
sirf_audio_probe(struct platform_device * pdev)83 static int sirf_audio_probe(struct platform_device *pdev)
84 {
85 struct snd_soc_card *card = &snd_soc_sirf_audio_card;
86 struct sirf_audio_card *sirf_audio_card;
87 int ret;
88
89 sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card),
90 GFP_KERNEL);
91 if (sirf_audio_card == NULL)
92 return -ENOMEM;
93
94 sirf_audio_dai_link[0].cpu_of_node =
95 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
96 sirf_audio_dai_link[0].platform_of_node =
97 of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
98 sirf_audio_dai_link[0].codec_of_node =
99 of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0);
100 sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node,
101 "spk-pa-gpios", 0);
102 sirf_audio_card->gpio_hp_pa = of_get_named_gpio(pdev->dev.of_node,
103 "hp-pa-gpios", 0);
104 if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) {
105 ret = devm_gpio_request_one(&pdev->dev,
106 sirf_audio_card->gpio_spk_pa,
107 GPIOF_OUT_INIT_LOW, "SPA_PA_SD");
108 if (ret) {
109 dev_err(&pdev->dev,
110 "Failed to request GPIO_%d for reset: %d\n",
111 sirf_audio_card->gpio_spk_pa, ret);
112 return ret;
113 }
114 }
115 if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) {
116 ret = devm_gpio_request_one(&pdev->dev,
117 sirf_audio_card->gpio_hp_pa,
118 GPIOF_OUT_INIT_LOW, "HP_PA_SD");
119 if (ret) {
120 dev_err(&pdev->dev,
121 "Failed to request GPIO_%d for reset: %d\n",
122 sirf_audio_card->gpio_hp_pa, ret);
123 return ret;
124 }
125 }
126
127 card->dev = &pdev->dev;
128 snd_soc_card_set_drvdata(card, sirf_audio_card);
129
130 ret = devm_snd_soc_register_card(&pdev->dev, card);
131 if (ret)
132 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
133
134 return ret;
135 }
136
137 static const struct of_device_id sirf_audio_of_match[] = {
138 {.compatible = "sirf,sirf-audio-card", },
139 { },
140 };
141 MODULE_DEVICE_TABLE(of, sirf_audio_of_match);
142
143 static struct platform_driver sirf_audio_driver = {
144 .driver = {
145 .name = "sirf-audio-card",
146 .pm = &snd_soc_pm_ops,
147 .of_match_table = sirf_audio_of_match,
148 },
149 .probe = sirf_audio_probe,
150 };
151 module_platform_driver(sirf_audio_driver);
152
153 MODULE_AUTHOR("RongJun Ying <RongJun.Ying@csr.com>");
154 MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver");
155 MODULE_LICENSE("GPL v2");
156