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 | |
48 | static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg) |
49 | { |
50 | return reg >= 0x10 && reg <= 0x17; |
51 | } |
52 | |
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 | |
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(c: component); |
73 | |
74 | priv->format = format; |
75 | |
76 | return 0; |
77 | } |
78 | |
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(c: component); |
83 | int ret; |
84 | |
85 | ret = regmap_update_bits(map: priv->regmap, PCM179X_SOFT_MUTE, |
86 | PCM179X_MUTE_MASK, val: !!mute); |
87 | if (ret < 0) |
88 | return ret; |
89 | |
90 | return 0; |
91 | } |
92 | |
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(c: component); |
99 | int val = 0, ret; |
100 | |
101 | priv->rate = params_rate(p: params); |
102 | |
103 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { |
104 | case SND_SOC_DAIFMT_RIGHT_J: |
105 | switch (params_width(p: 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(p: 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(map: 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 | |
212 | int pcm179x_common_init(struct device *dev, struct regmap *regmap) |
213 | { |
214 | struct pcm179x_private *pcm179x; |
215 | |
216 | pcm179x = devm_kzalloc(dev, size: sizeof(struct pcm179x_private), |
217 | GFP_KERNEL); |
218 | if (!pcm179x) |
219 | return -ENOMEM; |
220 | |
221 | pcm179x->regmap = regmap; |
222 | dev_set_drvdata(dev, data: pcm179x); |
223 | |
224 | return devm_snd_soc_register_component(dev, |
225 | component_driver: &soc_component_dev_pcm179x, dai_drv: &pcm179x_dai, num_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 | |