summaryrefslogtreecommitdiffstats
path: root/sound/soc/sirf/sirf-audio.c
blob: 94ea152e036218e46452c97425b41dd5a468794a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*
 * SiRF audio card driver
 *
 * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
 *
 * Licensed under GPLv2 or later.
 */

#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

struct sirf_audio_card {
	unsigned int            gpio_hp_pa;
	unsigned int            gpio_spk_pa;
};

static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w,
				struct snd_kcontrol *ctrl, int event)
{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct snd_soc_card *card = dapm->card;
	struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
	int on = !SND_SOC_DAPM_EVENT_OFF(event);
	if (gpio_is_valid(sirf_audio_card->gpio_hp_pa))
		gpio_set_value(sirf_audio_card->gpio_hp_pa, on);
	return 0;
}

static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w,
				struct snd_kcontrol *ctrl, int event)
{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct snd_soc_card *card = dapm->card;
	struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card);
	int on = !SND_SOC_DAPM_EVENT_OFF(event);

	if (gpio_is_valid(sirf_audio_card->gpio_spk_pa))
		gpio_set_value(sirf_audio_card->gpio_spk_pa, on);

	return 0;
}
static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event),
	SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event),
	SND_SOC_DAPM_MIC("Ext Mic", NULL),
};

static const struct snd_soc_dapm_route intercon[] = {
	{"Hp", NULL, "HPOUTL"},
	{"Hp", NULL, "HPOUTR"},
	{"Ext Spk", NULL, "SPKOUT"},
	{"MICIN1", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Ext Mic"},
};

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link sirf_audio_dai_link[] = {
	{
		.name = "SiRF audio card",
		.stream_name = "SiRF audio HiFi",
		.codec_dai_name = "sirf-audio-codec",
	},
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_sirf_audio_card = {
	.name = "SiRF audio card",
	.owner = THIS_MODULE,
	.dai_link = sirf_audio_dai_link,
	.num_links = ARRAY_SIZE(sirf_audio_dai_link),
	.dapm_widgets = sirf_audio_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets),
	.dapm_routes = intercon,
	.num_dapm_routes = ARRAY_SIZE(intercon),
};

static int sirf_audio_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card = &snd_soc_sirf_audio_card;
	struct sirf_audio_card *sirf_audio_card;
	int ret;

	sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card),
			GFP_KERNEL);
	if (sirf_audio_card == NULL)
		return -ENOMEM;

	sirf_audio_dai_link[0].cpu_of_node =
		of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
	sirf_audio_dai_link[0].platform_of_node =
		of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0);
	sirf_audio_dai_link[0].codec_of_node =
		of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0);
	sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node,
			"spk-pa-gpios", 0);
	sirf_audio_card->gpio_hp_pa =  of_get_named_gpio(pdev->dev.of_node,
			"hp-pa-gpios", 0);
	if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) {
		ret = devm_gpio_request_one(&pdev->dev,
				sirf_audio_card->gpio_spk_pa,
				GPIOF_OUT_INIT_LOW, "SPA_PA_SD");
		if (ret) {
			dev_err(&pdev->dev,
				"Failed to request GPIO_%d for reset: %d\n",
				sirf_audio_card->gpio_spk_pa, ret);
			return ret;
		}
	}
	if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) {
		ret = devm_gpio_request_one(&pdev->dev,
				sirf_audio_card->gpio_hp_pa,
				GPIOF_OUT_INIT_LOW, "HP_PA_SD");
		if (ret) {
			dev_err(&pdev->dev,
				"Failed to request GPIO_%d for reset: %d\n",
				sirf_audio_card->gpio_hp_pa, ret);
			return ret;
		}
	}

	card->dev = &pdev->dev;
	snd_soc_card_set_drvdata(card, sirf_audio_card);

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
		dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);

	return ret;
}

static const struct of_device_id sirf_audio_of_match[] = {
	{.compatible = "sirf,sirf-audio-card", },
	{ },
};
MODULE_DEVICE_TABLE(of, sirf_audio_of_match);

static struct platform_driver sirf_audio_driver = {
	.driver = {
		.name = "sirf-audio-card",
		.pm = &snd_soc_pm_ops,
		.of_match_table = sirf_audio_of_match,
	},
	.probe = sirf_audio_probe,
};
module_platform_driver(sirf_audio_driver);

MODULE_AUTHOR("RongJun Ying <RongJun.Ying@csr.com>");
MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver");
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud