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13b02fa0 MT |
1 | /* |
2 | * PCM1792A ASoC codec driver | |
3 | * | |
4 | * Copyright (c) Amarula Solutions B.V. 2013 | |
5 | * | |
6 | * Michael Trimarchi <michael@amarulasolutions.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version 2 | |
11 | * of the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/spi/spi.h> | |
24 | ||
25 | #include <sound/core.h> | |
26 | #include <sound/pcm.h> | |
27 | #include <sound/pcm_params.h> | |
28 | #include <sound/initval.h> | |
29 | #include <sound/soc.h> | |
30 | #include <sound/tlv.h> | |
4b2fa512 | 31 | #include <linux/of.h> |
13b02fa0 MT |
32 | #include <linux/of_device.h> |
33 | ||
34 | #include "pcm1792a.h" | |
35 | ||
36 | #define PCM1792A_DAC_VOL_LEFT 0x10 | |
37 | #define PCM1792A_DAC_VOL_RIGHT 0x11 | |
38 | #define PCM1792A_FMT_CONTROL 0x12 | |
39 | #define PCM1792A_SOFT_MUTE PCM1792A_FMT_CONTROL | |
40 | ||
41 | #define PCM1792A_FMT_MASK 0x70 | |
42 | #define PCM1792A_FMT_SHIFT 4 | |
43 | #define PCM1792A_MUTE_MASK 0x01 | |
44 | #define PCM1792A_MUTE_SHIFT 0 | |
45 | #define PCM1792A_ATLD_ENABLE (1 << 7) | |
46 | ||
47 | static const struct reg_default pcm1792a_reg_defaults[] = { | |
48 | { 0x10, 0xff }, | |
49 | { 0x11, 0xff }, | |
50 | { 0x12, 0x50 }, | |
51 | { 0x13, 0x00 }, | |
52 | { 0x14, 0x00 }, | |
53 | { 0x15, 0x01 }, | |
54 | { 0x16, 0x00 }, | |
55 | { 0x17, 0x00 }, | |
56 | }; | |
57 | ||
58 | static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg) | |
59 | { | |
60 | return reg >= 0x10 && reg <= 0x17; | |
61 | } | |
62 | ||
63 | static bool pcm1792a_writeable_reg(struct device *dev, unsigned register reg) | |
64 | { | |
65 | bool accessible; | |
66 | ||
67 | accessible = pcm1792a_accessible_reg(dev, reg); | |
68 | ||
69 | return accessible && reg != 0x16 && reg != 0x17; | |
70 | } | |
71 | ||
72 | struct pcm1792a_private { | |
73 | struct regmap *regmap; | |
74 | unsigned int format; | |
75 | unsigned int rate; | |
76 | }; | |
77 | ||
78 | static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
79 | unsigned int format) | |
80 | { | |
81 | struct snd_soc_codec *codec = codec_dai->codec; | |
82 | struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); | |
83 | ||
84 | priv->format = format; | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | static int pcm1792a_digital_mute(struct snd_soc_dai *dai, int mute) | |
90 | { | |
91 | struct snd_soc_codec *codec = dai->codec; | |
92 | struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); | |
93 | int ret; | |
94 | ||
95 | ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE, | |
96 | PCM1792A_MUTE_MASK, !!mute); | |
97 | if (ret < 0) | |
98 | return ret; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int pcm1792a_hw_params(struct snd_pcm_substream *substream, | |
104 | struct snd_pcm_hw_params *params, | |
105 | struct snd_soc_dai *dai) | |
106 | { | |
107 | struct snd_soc_codec *codec = dai->codec; | |
108 | struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); | |
109 | int val = 0, ret; | |
13b02fa0 MT |
110 | |
111 | priv->rate = params_rate(params); | |
112 | ||
113 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
114 | case SND_SOC_DAIFMT_RIGHT_J: | |
e48c6d7f MB |
115 | switch (params_width(params)) { |
116 | case 24: | |
117 | case 32: | |
118 | val = 2; | |
119 | break; | |
120 | case 16: | |
121 | val = 0; | |
122 | break; | |
123 | default: | |
124 | return -EINVAL; | |
125 | } | |
13b02fa0 MT |
126 | break; |
127 | case SND_SOC_DAIFMT_I2S: | |
e48c6d7f MB |
128 | switch (params_width(params)) { |
129 | case 24: | |
130 | case 32: | |
131 | val = 5; | |
132 | break; | |
133 | case 16: | |
134 | val = 4; | |
135 | break; | |
136 | default: | |
137 | return -EINVAL; | |
138 | } | |
13b02fa0 MT |
139 | break; |
140 | default: | |
141 | dev_err(codec->dev, "Invalid DAI format\n"); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | val = val << PCM1792A_FMT_SHIFT | PCM1792A_ATLD_ENABLE; | |
146 | ||
147 | ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL, | |
148 | PCM1792A_FMT_MASK | PCM1792A_ATLD_ENABLE, val); | |
149 | if (ret < 0) | |
150 | return ret; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static const struct snd_soc_dai_ops pcm1792a_dai_ops = { | |
156 | .set_fmt = pcm1792a_set_dai_fmt, | |
157 | .hw_params = pcm1792a_hw_params, | |
158 | .digital_mute = pcm1792a_digital_mute, | |
159 | }; | |
160 | ||
161 | static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1); | |
162 | ||
163 | static const struct snd_kcontrol_new pcm1792a_controls[] = { | |
164 | SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT, | |
165 | PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, | |
166 | pcm1792a_dac_tlv), | |
167 | }; | |
168 | ||
e7a5cb42 MB |
169 | static const struct snd_soc_dapm_widget pcm1792a_dapm_widgets[] = { |
170 | SND_SOC_DAPM_OUTPUT("IOUTL+"), | |
171 | SND_SOC_DAPM_OUTPUT("IOUTL-"), | |
172 | SND_SOC_DAPM_OUTPUT("IOUTR+"), | |
173 | SND_SOC_DAPM_OUTPUT("IOUTR-"), | |
174 | }; | |
175 | ||
176 | static const struct snd_soc_dapm_route pcm1792a_dapm_routes[] = { | |
177 | { "IOUTL+", NULL, "Playback" }, | |
178 | { "IOUTL-", NULL, "Playback" }, | |
179 | { "IOUTR+", NULL, "Playback" }, | |
180 | { "IOUTR-", NULL, "Playback" }, | |
181 | }; | |
182 | ||
13b02fa0 MT |
183 | static struct snd_soc_dai_driver pcm1792a_dai = { |
184 | .name = "pcm1792a-hifi", | |
185 | .playback = { | |
186 | .stream_name = "Playback", | |
187 | .channels_min = 2, | |
188 | .channels_max = 2, | |
189 | .rates = PCM1792A_RATES, | |
190 | .formats = PCM1792A_FORMATS, }, | |
13b02fa0 MT |
191 | .ops = &pcm1792a_dai_ops, |
192 | }; | |
193 | ||
13b02fa0 MT |
194 | static const struct of_device_id pcm1792a_of_match[] = { |
195 | { .compatible = "ti,pcm1792a", }, | |
196 | { } | |
197 | }; | |
198 | MODULE_DEVICE_TABLE(of, pcm1792a_of_match); | |
13b02fa0 MT |
199 | |
200 | static const struct regmap_config pcm1792a_regmap = { | |
201 | .reg_bits = 8, | |
202 | .val_bits = 8, | |
c92f66e2 | 203 | .max_register = 23, |
13b02fa0 MT |
204 | .reg_defaults = pcm1792a_reg_defaults, |
205 | .num_reg_defaults = ARRAY_SIZE(pcm1792a_reg_defaults), | |
206 | .writeable_reg = pcm1792a_writeable_reg, | |
207 | .readable_reg = pcm1792a_accessible_reg, | |
208 | }; | |
209 | ||
210 | static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = { | |
211 | .controls = pcm1792a_controls, | |
212 | .num_controls = ARRAY_SIZE(pcm1792a_controls), | |
e7a5cb42 MB |
213 | .dapm_widgets = pcm1792a_dapm_widgets, |
214 | .num_dapm_widgets = ARRAY_SIZE(pcm1792a_dapm_widgets), | |
215 | .dapm_routes = pcm1792a_dapm_routes, | |
216 | .num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes), | |
13b02fa0 MT |
217 | }; |
218 | ||
219 | static int pcm1792a_spi_probe(struct spi_device *spi) | |
220 | { | |
221 | struct pcm1792a_private *pcm1792a; | |
222 | int ret; | |
223 | ||
224 | pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private), | |
225 | GFP_KERNEL); | |
226 | if (!pcm1792a) | |
227 | return -ENOMEM; | |
228 | ||
229 | spi_set_drvdata(spi, pcm1792a); | |
230 | ||
231 | pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap); | |
232 | if (IS_ERR(pcm1792a->regmap)) { | |
233 | ret = PTR_ERR(pcm1792a->regmap); | |
234 | dev_err(&spi->dev, "Failed to register regmap: %d\n", ret); | |
235 | return ret; | |
236 | } | |
237 | ||
238 | return snd_soc_register_codec(&spi->dev, | |
239 | &soc_codec_dev_pcm1792a, &pcm1792a_dai, 1); | |
240 | } | |
241 | ||
242 | static int pcm1792a_spi_remove(struct spi_device *spi) | |
243 | { | |
244 | snd_soc_unregister_codec(&spi->dev); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static const struct spi_device_id pcm1792a_spi_ids[] = { | |
249 | { "pcm1792a", 0 }, | |
250 | { }, | |
251 | }; | |
252 | MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids); | |
253 | ||
254 | static struct spi_driver pcm1792a_codec_driver = { | |
255 | .driver = { | |
256 | .name = "pcm1792a", | |
257 | .owner = THIS_MODULE, | |
55af2d23 | 258 | .of_match_table = of_match_ptr(pcm1792a_of_match), |
13b02fa0 MT |
259 | }, |
260 | .id_table = pcm1792a_spi_ids, | |
261 | .probe = pcm1792a_spi_probe, | |
262 | .remove = pcm1792a_spi_remove, | |
263 | }; | |
264 | ||
265 | module_spi_driver(pcm1792a_codec_driver); | |
266 | ||
267 | MODULE_DESCRIPTION("ASoC PCM1792A driver"); | |
268 | MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>"); | |
269 | MODULE_LICENSE("GPL"); |