1 /*
2 * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * You should have received a copy of the GNU General Public License along
9 * with this program; if not, write to the Free Software Foundation, Inc.,
10 * 675 Mass Ave, Cambridge, MA 02139, USA.
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/timer.h>
17 #include <linux/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/soc.h>
22 #include <linux/gpio/consumer.h>
23
24 struct qi_lb60 {
25 struct gpio_desc *snd_gpio;
26 struct gpio_desc *amp_gpio;
27 };
28
qi_lb60_spk_event(struct snd_soc_dapm_widget * widget,struct snd_kcontrol * ctrl,int event)29 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
30 struct snd_kcontrol *ctrl, int event)
31 {
32 struct qi_lb60 *qi_lb60 = snd_soc_card_get_drvdata(widget->dapm->card);
33 int on = !SND_SOC_DAPM_EVENT_OFF(event);
34
35 gpiod_set_value_cansleep(qi_lb60->snd_gpio, on);
36 gpiod_set_value_cansleep(qi_lb60->amp_gpio, on);
37
38 return 0;
39 }
40
41 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
42 SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
43 SND_SOC_DAPM_MIC("Mic", NULL),
44 };
45
46 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
47 {"Mic", NULL, "MIC"},
48 {"Speaker", NULL, "LOUT"},
49 {"Speaker", NULL, "ROUT"},
50 };
51
52 static struct snd_soc_dai_link qi_lb60_dai = {
53 .name = "jz4740",
54 .stream_name = "jz4740",
55 .cpu_dai_name = "jz4740-i2s",
56 .platform_name = "jz4740-i2s",
57 .codec_dai_name = "jz4740-hifi",
58 .codec_name = "jz4740-codec",
59 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
60 SND_SOC_DAIFMT_CBM_CFM,
61 };
62
63 static struct snd_soc_card qi_lb60_card = {
64 .name = "QI LB60",
65 .owner = THIS_MODULE,
66 .dai_link = &qi_lb60_dai,
67 .num_links = 1,
68
69 .dapm_widgets = qi_lb60_widgets,
70 .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
71 .dapm_routes = qi_lb60_routes,
72 .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
73 .fully_routed = true,
74 };
75
qi_lb60_probe(struct platform_device * pdev)76 static int qi_lb60_probe(struct platform_device *pdev)
77 {
78 struct qi_lb60 *qi_lb60;
79 struct snd_soc_card *card = &qi_lb60_card;
80
81 qi_lb60 = devm_kzalloc(&pdev->dev, sizeof(*qi_lb60), GFP_KERNEL);
82 if (!qi_lb60)
83 return -ENOMEM;
84
85 qi_lb60->snd_gpio = devm_gpiod_get(&pdev->dev, "snd", GPIOD_OUT_LOW);
86 if (IS_ERR(qi_lb60->snd_gpio))
87 return PTR_ERR(qi_lb60->snd_gpio);
88
89 qi_lb60->amp_gpio = devm_gpiod_get(&pdev->dev, "amp", GPIOD_OUT_LOW);
90 if (IS_ERR(qi_lb60->amp_gpio))
91 return PTR_ERR(qi_lb60->amp_gpio);
92
93 card->dev = &pdev->dev;
94
95 snd_soc_card_set_drvdata(card, qi_lb60);
96
97 return devm_snd_soc_register_card(&pdev->dev, card);
98 }
99
100 static struct platform_driver qi_lb60_driver = {
101 .driver = {
102 .name = "qi-lb60-audio",
103 },
104 .probe = qi_lb60_probe,
105 };
106
107 module_platform_driver(qi_lb60_driver);
108
109 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
110 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
111 MODULE_LICENSE("GPL v2");
112 MODULE_ALIAS("platform:qi-lb60-audio");
113