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.h>
23
24 #define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
25 #define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
26
qi_lb60_spk_event(struct snd_soc_dapm_widget * widget,struct snd_kcontrol * ctrl,int event)27 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
28 struct snd_kcontrol *ctrl, int event)
29 {
30 int on = !SND_SOC_DAPM_EVENT_OFF(event);
31
32 gpio_set_value(QI_LB60_SND_GPIO, on);
33 gpio_set_value(QI_LB60_AMP_GPIO, on);
34
35 return 0;
36 }
37
38 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
39 SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
40 SND_SOC_DAPM_MIC("Mic", NULL),
41 };
42
43 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
44 {"Mic", NULL, "MIC"},
45 {"Speaker", NULL, "LOUT"},
46 {"Speaker", NULL, "ROUT"},
47 };
48
49 #define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
50 SND_SOC_DAIFMT_NB_NF | \
51 SND_SOC_DAIFMT_CBM_CFM)
52
qi_lb60_codec_init(struct snd_soc_pcm_runtime * rtd)53 static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
54 {
55 struct snd_soc_codec *codec = rtd->codec;
56 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
57 struct snd_soc_dapm_context *dapm = &codec->dapm;
58 int ret;
59
60 snd_soc_dapm_nc_pin(dapm, "LIN");
61 snd_soc_dapm_nc_pin(dapm, "RIN");
62
63 ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
64 if (ret < 0) {
65 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
66 return ret;
67 }
68
69 return 0;
70 }
71
72 static struct snd_soc_dai_link qi_lb60_dai = {
73 .name = "jz4740",
74 .stream_name = "jz4740",
75 .cpu_dai_name = "jz4740-i2s",
76 .platform_name = "jz4740-pcm-audio",
77 .codec_dai_name = "jz4740-hifi",
78 .codec_name = "jz4740-codec",
79 .init = qi_lb60_codec_init,
80 };
81
82 static struct snd_soc_card qi_lb60 = {
83 .name = "QI LB60",
84 .owner = THIS_MODULE,
85 .dai_link = &qi_lb60_dai,
86 .num_links = 1,
87
88 .dapm_widgets = qi_lb60_widgets,
89 .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
90 .dapm_routes = qi_lb60_routes,
91 .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
92 };
93
94 static const struct gpio qi_lb60_gpios[] = {
95 { QI_LB60_SND_GPIO, GPIOF_OUT_INIT_LOW, "SND" },
96 { QI_LB60_AMP_GPIO, GPIOF_OUT_INIT_LOW, "AMP" },
97 };
98
qi_lb60_probe(struct platform_device * pdev)99 static int qi_lb60_probe(struct platform_device *pdev)
100 {
101 struct snd_soc_card *card = &qi_lb60;
102 int ret;
103
104 ret = gpio_request_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
105 if (ret)
106 return ret;
107
108 card->dev = &pdev->dev;
109
110 ret = snd_soc_register_card(card);
111 if (ret) {
112 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
113 ret);
114 gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
115 }
116 return ret;
117 }
118
qi_lb60_remove(struct platform_device * pdev)119 static int qi_lb60_remove(struct platform_device *pdev)
120 {
121 struct snd_soc_card *card = platform_get_drvdata(pdev);
122
123 snd_soc_unregister_card(card);
124 gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
125 return 0;
126 }
127
128 static struct platform_driver qi_lb60_driver = {
129 .driver = {
130 .name = "qi-lb60-audio",
131 .owner = THIS_MODULE,
132 },
133 .probe = qi_lb60_probe,
134 .remove = qi_lb60_remove,
135 };
136
137 module_platform_driver(qi_lb60_driver);
138
139 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
140 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
141 MODULE_LICENSE("GPL v2");
142 MODULE_ALIAS("platform:qi-lb60-audio");
143