xref: /openbmc/linux/sound/soc/codecs/pcm179x.c (revision 8d4470b8)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * PCM179X ASoC codec driver
4  *
5  * Copyright (c) Amarula Solutions B.V. 2013
6  *
7  *     Michael Trimarchi <michael@amarulasolutions.com>
8  */
9 
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/kernel.h>
13 #include <linux/device.h>
14 
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/initval.h>
19 #include <sound/soc.h>
20 #include <sound/tlv.h>
21 #include <linux/of.h>
22 
23 #include "pcm179x.h"
24 
25 #define PCM179X_DAC_VOL_LEFT	0x10
26 #define PCM179X_DAC_VOL_RIGHT	0x11
27 #define PCM179X_FMT_CONTROL	0x12
28 #define PCM179X_MODE_CONTROL	0x13
29 #define PCM179X_SOFT_MUTE	PCM179X_FMT_CONTROL
30 
31 #define PCM179X_FMT_MASK	0x70
32 #define PCM179X_FMT_SHIFT	4
33 #define PCM179X_MUTE_MASK	0x01
34 #define PCM179X_MUTE_SHIFT	0
35 #define PCM179X_ATLD_ENABLE	(1 << 7)
36 
37 static const struct reg_default pcm179x_reg_defaults[] = {
38 	{ 0x10, 0xff },
39 	{ 0x11, 0xff },
40 	{ 0x12, 0x50 },
41 	{ 0x13, 0x00 },
42 	{ 0x14, 0x00 },
43 	{ 0x15, 0x01 },
44 	{ 0x16, 0x00 },
45 	{ 0x17, 0x00 },
46 };
47 
pcm179x_accessible_reg(struct device * dev,unsigned int reg)48 static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
49 {
50 	return reg >= 0x10 && reg <= 0x17;
51 }
52 
pcm179x_writeable_reg(struct device * dev,unsigned int reg)53 static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
54 {
55 	bool accessible;
56 
57 	accessible = pcm179x_accessible_reg(dev, reg);
58 
59 	return accessible && reg != 0x16 && reg != 0x17;
60 }
61 
62 struct pcm179x_private {
63 	struct regmap *regmap;
64 	unsigned int format;
65 	unsigned int rate;
66 };
67 
pcm179x_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int format)68 static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
69                              unsigned int format)
70 {
71 	struct snd_soc_component *component = codec_dai->component;
72 	struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
73 
74 	priv->format = format;
75 
76 	return 0;
77 }
78 
pcm179x_mute(struct snd_soc_dai * dai,int mute,int direction)79 static int pcm179x_mute(struct snd_soc_dai *dai, int mute, int direction)
80 {
81 	struct snd_soc_component *component = dai->component;
82 	struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
83 	int ret;
84 
85 	ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
86 				 PCM179X_MUTE_MASK, !!mute);
87 	if (ret < 0)
88 		return ret;
89 
90 	return 0;
91 }
92 
pcm179x_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)93 static int pcm179x_hw_params(struct snd_pcm_substream *substream,
94 			     struct snd_pcm_hw_params *params,
95 			     struct snd_soc_dai *dai)
96 {
97 	struct snd_soc_component *component = dai->component;
98 	struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
99 	int val = 0, ret;
100 
101 	priv->rate = params_rate(params);
102 
103 	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
104 	case SND_SOC_DAIFMT_RIGHT_J:
105 		switch (params_width(params)) {
106 		case 24:
107 		case 32:
108 			val = 2;
109 			break;
110 		case 16:
111 			val = 0;
112 			break;
113 		default:
114 			return -EINVAL;
115 		}
116 		break;
117 	case SND_SOC_DAIFMT_I2S:
118 		switch (params_width(params)) {
119 		case 24:
120 		case 32:
121 			val = 5;
122 			break;
123 		case 16:
124 			val = 4;
125 			break;
126 		default:
127 			return -EINVAL;
128 		}
129 		break;
130 	default:
131 		dev_err(component->dev, "Invalid DAI format\n");
132 		return -EINVAL;
133 	}
134 
135 	val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
136 
137 	ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
138 				 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
139 	if (ret < 0)
140 		return ret;
141 
142 	return 0;
143 }
144 
145 static const struct snd_soc_dai_ops pcm179x_dai_ops = {
146 	.set_fmt	= pcm179x_set_dai_fmt,
147 	.hw_params	= pcm179x_hw_params,
148 	.mute_stream	= pcm179x_mute,
149 	.no_capture_mute = 1,
150 };
151 
152 static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
153 
154 static const struct snd_kcontrol_new pcm179x_controls[] = {
155 	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
156 			 PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
157 			 pcm179x_dac_tlv),
158 	SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
159 	SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
160 };
161 
162 static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
163 SND_SOC_DAPM_OUTPUT("IOUTL+"),
164 SND_SOC_DAPM_OUTPUT("IOUTL-"),
165 SND_SOC_DAPM_OUTPUT("IOUTR+"),
166 SND_SOC_DAPM_OUTPUT("IOUTR-"),
167 };
168 
169 static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
170 	{ "IOUTL+", NULL, "Playback" },
171 	{ "IOUTL-", NULL, "Playback" },
172 	{ "IOUTR+", NULL, "Playback" },
173 	{ "IOUTR-", NULL, "Playback" },
174 };
175 
176 static struct snd_soc_dai_driver pcm179x_dai = {
177 	.name = "pcm179x-hifi",
178 	.playback = {
179 		.stream_name = "Playback",
180 		.channels_min = 2,
181 		.channels_max = 2,
182 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
183 		.rate_min = 10000,
184 		.rate_max = 200000,
185 		.formats = PCM1792A_FORMATS, },
186 	.ops = &pcm179x_dai_ops,
187 };
188 
189 const struct regmap_config pcm179x_regmap_config = {
190 	.reg_bits		= 8,
191 	.val_bits		= 8,
192 	.max_register		= 23,
193 	.reg_defaults		= pcm179x_reg_defaults,
194 	.num_reg_defaults	= ARRAY_SIZE(pcm179x_reg_defaults),
195 	.writeable_reg		= pcm179x_writeable_reg,
196 	.readable_reg		= pcm179x_accessible_reg,
197 };
198 EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
199 
200 static const struct snd_soc_component_driver soc_component_dev_pcm179x = {
201 	.controls		= pcm179x_controls,
202 	.num_controls		= ARRAY_SIZE(pcm179x_controls),
203 	.dapm_widgets		= pcm179x_dapm_widgets,
204 	.num_dapm_widgets	= ARRAY_SIZE(pcm179x_dapm_widgets),
205 	.dapm_routes		= pcm179x_dapm_routes,
206 	.num_dapm_routes	= ARRAY_SIZE(pcm179x_dapm_routes),
207 	.idle_bias_on		= 1,
208 	.use_pmdown_time	= 1,
209 	.endianness		= 1,
210 };
211 
pcm179x_common_init(struct device * dev,struct regmap * regmap)212 int pcm179x_common_init(struct device *dev, struct regmap *regmap)
213 {
214 	struct pcm179x_private *pcm179x;
215 
216 	pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
217 				GFP_KERNEL);
218 	if (!pcm179x)
219 		return -ENOMEM;
220 
221 	pcm179x->regmap = regmap;
222 	dev_set_drvdata(dev, pcm179x);
223 
224 	return devm_snd_soc_register_component(dev,
225 			&soc_component_dev_pcm179x, &pcm179x_dai, 1);
226 }
227 EXPORT_SYMBOL_GPL(pcm179x_common_init);
228 
229 MODULE_DESCRIPTION("ASoC PCM179X driver");
230 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
231 MODULE_LICENSE("GPL");
232