tjh.dev
Linux kernel mirror (for testing)
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linux
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
28static 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
33static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
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
49static 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
62static 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
89static const struct snd_soc_dai_ops cq93vc_dai_ops = {
90 .digital_mute = cq93vc_mute,
91 .set_sysclk = cq93vc_set_dai_sysclk,
92};
93
94static struct snd_soc_dai_driver cq93vc_dai = {
95 .name = "cq93vc-hifi",
96 .playback = {
97 .stream_name = "Playback",
98 .channels_min = 1,
99 .channels_max = 2,
100 .rates = CQ93VC_RATES,
101 .formats = CQ93VC_FORMATS,},
102 .capture = {
103 .stream_name = "Capture",
104 .channels_min = 1,
105 .channels_max = 2,
106 .rates = CQ93VC_RATES,
107 .formats = CQ93VC_FORMATS,},
108 .ops = &cq93vc_dai_ops,
109};
110
111static int cq93vc_probe(struct snd_soc_component *component)
112{
113 struct davinci_vc *davinci_vc = component->dev->platform_data;
114
115 snd_soc_component_init_regmap(component, davinci_vc->regmap);
116
117 return 0;
118}
119
120static const struct snd_soc_component_driver soc_component_dev_cq93vc = {
121 .set_bias_level = cq93vc_set_bias_level,
122 .probe = cq93vc_probe,
123 .controls = cq93vc_snd_controls,
124 .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
125 .idle_bias_on = 1,
126 .use_pmdown_time = 1,
127 .endianness = 1,
128 .non_legacy_dai_naming = 1,
129};
130
131static 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
137static int cq93vc_platform_remove(struct platform_device *pdev)
138{
139 return 0;
140}
141
142static 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
151module_platform_driver(cq93vc_codec_driver);
152
153MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
154MODULE_AUTHOR("Miguel Aguilar");
155MODULE_LICENSE("GPL");