xref: /linux/sound/soc/codecs/cq93vc.c (revision 3c4fc7bf4c9e66fe71abcbf93f62f4ddb89b7f15) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
4  *
5  * Copyright (C) 2010 Texas Instruments, Inc
6  *
7  * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
8  */
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/init.h>
12 #include <linux/io.h>
13 #include <linux/delay.h>
14 #include <linux/pm.h>
15 #include <linux/platform_device.h>
16 #include <linux/device.h>
17 #include <linux/slab.h>
18 #include <linux/clk.h>
19 #include <linux/mfd/davinci_voicecodec.h>
20 #include <linux/spi/spi.h>
21 
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 
28 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
29 	SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
30 	SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
31 };
32 
33 static int cq93vc_mute(struct snd_soc_dai *dai, int mute, int direction)
34 {
35 	struct snd_soc_component *component = dai->component;
36 	u8 reg;
37 
38 	if (mute)
39 		reg = DAVINCI_VC_REG09_MUTE;
40 	else
41 		reg = 0;
42 
43 	snd_soc_component_update_bits(component, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
44 			    reg);
45 
46 	return 0;
47 }
48 
49 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
50 				 int clk_id, unsigned int freq, int dir)
51 {
52 	switch (freq) {
53 	case 22579200:
54 	case 27000000:
55 	case 33868800:
56 		return 0;
57 	}
58 
59 	return -EINVAL;
60 }
61 
62 static int cq93vc_set_bias_level(struct snd_soc_component *component,
63 				enum snd_soc_bias_level level)
64 {
65 	switch (level) {
66 	case SND_SOC_BIAS_ON:
67 		snd_soc_component_write(component, DAVINCI_VC_REG12,
68 			     DAVINCI_VC_REG12_POWER_ALL_ON);
69 		break;
70 	case SND_SOC_BIAS_PREPARE:
71 		break;
72 	case SND_SOC_BIAS_STANDBY:
73 		snd_soc_component_write(component, DAVINCI_VC_REG12,
74 			     DAVINCI_VC_REG12_POWER_ALL_OFF);
75 		break;
76 	case SND_SOC_BIAS_OFF:
77 		/* force all power off */
78 		snd_soc_component_write(component, DAVINCI_VC_REG12,
79 			     DAVINCI_VC_REG12_POWER_ALL_OFF);
80 		break;
81 	}
82 
83 	return 0;
84 }
85 
86 #define CQ93VC_RATES	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
87 #define CQ93VC_FORMATS	(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
88 
89 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
90 	.mute_stream	= cq93vc_mute,
91 	.set_sysclk	= cq93vc_set_dai_sysclk,
92 	.no_capture_mute = 1,
93 };
94 
95 static struct snd_soc_dai_driver cq93vc_dai = {
96 	.name = "cq93vc-hifi",
97 	.playback = {
98 		.stream_name = "Playback",
99 		.channels_min = 1,
100 		.channels_max = 2,
101 		.rates = CQ93VC_RATES,
102 		.formats = CQ93VC_FORMATS,},
103 	.capture = {
104 		.stream_name = "Capture",
105 		.channels_min = 1,
106 		.channels_max = 2,
107 		.rates = CQ93VC_RATES,
108 		.formats = CQ93VC_FORMATS,},
109 	.ops = &cq93vc_dai_ops,
110 };
111 
112 static int cq93vc_probe(struct snd_soc_component *component)
113 {
114 	struct davinci_vc *davinci_vc = component->dev->platform_data;
115 
116 	snd_soc_component_init_regmap(component, davinci_vc->regmap);
117 
118 	return 0;
119 }
120 
121 static const struct snd_soc_component_driver soc_component_dev_cq93vc = {
122 	.set_bias_level		= cq93vc_set_bias_level,
123 	.probe			= cq93vc_probe,
124 	.controls		= cq93vc_snd_controls,
125 	.num_controls		= ARRAY_SIZE(cq93vc_snd_controls),
126 	.idle_bias_on		= 1,
127 	.use_pmdown_time	= 1,
128 	.endianness		= 1,
129 };
130 
131 static int cq93vc_platform_probe(struct platform_device *pdev)
132 {
133 	return devm_snd_soc_register_component(&pdev->dev,
134 			&soc_component_dev_cq93vc, &cq93vc_dai, 1);
135 }
136 
137 static int cq93vc_platform_remove(struct platform_device *pdev)
138 {
139 	return 0;
140 }
141 
142 static struct platform_driver cq93vc_codec_driver = {
143 	.driver = {
144 			.name = "cq93vc-codec",
145 	},
146 
147 	.probe = cq93vc_platform_probe,
148 	.remove = cq93vc_platform_remove,
149 };
150 
151 module_platform_driver(cq93vc_codec_driver);
152 
153 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
154 MODULE_AUTHOR("Miguel Aguilar");
155 MODULE_LICENSE("GPL");
156