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1 | /* |
2 | * PCM1681 ASoC codec driver | |
3 | * | |
4 | * Copyright (c) StreamUnlimited GmbH 2013 | |
5 | * Marek Belisko <marek.belisko@streamunlimited.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version 2 | |
10 | * of the License, or (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/gpio.h> | |
22 | #include <linux/i2c.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/of_device.h> | |
25 | #include <linux/of_gpio.h> | |
26 | #include <sound/pcm.h> | |
27 | #include <sound/pcm_params.h> | |
28 | #include <sound/soc.h> | |
29 | #include <sound/tlv.h> | |
30 | ||
31 | #define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ | |
32 | SNDRV_PCM_FMTBIT_S24_LE) | |
33 | ||
34 | #define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \ | |
35 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
36 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ | |
37 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000) | |
38 | ||
39 | #define PCM1681_SOFT_MUTE_ALL 0xff | |
40 | #define PCM1681_DEEMPH_RATE_MASK 0x18 | |
41 | #define PCM1681_DEEMPH_MASK 0x01 | |
42 | ||
43 | #define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */ | |
44 | #define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */ | |
45 | #define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */ | |
46 | #define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */ | |
47 | #define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */ | |
48 | #define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */ | |
49 | ||
50 | static const struct reg_default pcm1681_reg_defaults[] = { | |
51 | { 0x01, 0xff }, | |
52 | { 0x02, 0xff }, | |
53 | { 0x03, 0xff }, | |
54 | { 0x04, 0xff }, | |
55 | { 0x05, 0xff }, | |
56 | { 0x06, 0xff }, | |
57 | { 0x07, 0x00 }, | |
58 | { 0x08, 0x00 }, | |
59 | { 0x09, 0x06 }, | |
60 | { 0x0A, 0x00 }, | |
61 | { 0x0B, 0xff }, | |
62 | { 0x0C, 0x0f }, | |
63 | { 0x0D, 0x00 }, | |
64 | { 0x10, 0xff }, | |
65 | { 0x11, 0xff }, | |
66 | { 0x12, 0x00 }, | |
67 | { 0x13, 0x00 }, | |
68 | }; | |
69 | ||
70 | static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg) | |
71 | { | |
72 | return !((reg == 0x00) || (reg == 0x0f)); | |
73 | } | |
74 | ||
75 | static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg) | |
76 | { | |
77 | return pcm1681_accessible_reg(dev, reg) && | |
78 | (reg != PCM1681_ZERO_DETECT_STATUS); | |
79 | } | |
80 | ||
81 | struct pcm1681_private { | |
82 | struct regmap *regmap; | |
83 | unsigned int format; | |
84 | /* Current deemphasis status */ | |
85 | unsigned int deemph; | |
86 | /* Current rate for deemphasis control */ | |
87 | unsigned int rate; | |
88 | }; | |
89 | ||
90 | static const int pcm1681_deemph[] = { 44100, 48000, 32000 }; | |
91 | ||
92 | static int pcm1681_set_deemph(struct snd_soc_codec *codec) | |
93 | { | |
94 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
95 | int i = 0, val = -1, enable = 0; | |
96 | ||
97 | if (priv->deemph) | |
98 | for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) | |
99 | if (pcm1681_deemph[i] == priv->rate) | |
100 | val = i; | |
101 | ||
102 | if (val != -1) { | |
103 | regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, | |
104 | PCM1681_DEEMPH_RATE_MASK, val); | |
105 | enable = 1; | |
106 | } else | |
107 | enable = 0; | |
108 | ||
109 | /* enable/disable deemphasis functionality */ | |
110 | return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, | |
111 | PCM1681_DEEMPH_MASK, enable); | |
112 | } | |
113 | ||
114 | static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol, | |
115 | struct snd_ctl_elem_value *ucontrol) | |
116 | { | |
117 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); | |
118 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
119 | ||
120 | ucontrol->value.enumerated.item[0] = priv->deemph; | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol, | |
126 | struct snd_ctl_elem_value *ucontrol) | |
127 | { | |
128 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); | |
129 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
130 | ||
131 | priv->deemph = ucontrol->value.enumerated.item[0]; | |
132 | ||
133 | return pcm1681_set_deemph(codec); | |
134 | } | |
135 | ||
136 | static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
137 | unsigned int format) | |
138 | { | |
139 | struct snd_soc_codec *codec = codec_dai->codec; | |
140 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
141 | ||
142 | /* The PCM1681 can only be slave to all clocks */ | |
143 | if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { | |
144 | dev_err(codec->dev, "Invalid clocking mode\n"); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | priv->format = format; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute) | |
154 | { | |
155 | struct snd_soc_codec *codec = dai->codec; | |
156 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
157 | int val; | |
158 | ||
159 | if (mute) | |
160 | val = PCM1681_SOFT_MUTE_ALL; | |
161 | else | |
162 | val = 0; | |
163 | ||
164 | return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val); | |
165 | } | |
166 | ||
167 | static int pcm1681_hw_params(struct snd_pcm_substream *substream, | |
168 | struct snd_pcm_hw_params *params, | |
169 | struct snd_soc_dai *dai) | |
170 | { | |
171 | struct snd_soc_codec *codec = dai->codec; | |
172 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
173 | int val = 0, ret; | |
174 | int pcm_format = params_format(params); | |
175 | ||
176 | priv->rate = params_rate(params); | |
177 | ||
178 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
179 | case SND_SOC_DAIFMT_RIGHT_J: | |
180 | if (pcm_format == SNDRV_PCM_FORMAT_S24_LE) | |
181 | val = 0x00; | |
182 | else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE) | |
183 | val = 0x03; | |
184 | break; | |
185 | case SND_SOC_DAIFMT_I2S: | |
186 | val = 0x04; | |
187 | break; | |
188 | case SND_SOC_DAIFMT_LEFT_J: | |
189 | val = 0x05; | |
190 | break; | |
191 | default: | |
192 | dev_err(codec->dev, "Invalid DAI format\n"); | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val); | |
197 | if (ret < 0) | |
198 | return ret; | |
199 | ||
200 | return pcm1681_set_deemph(codec); | |
201 | } | |
202 | ||
203 | static const struct snd_soc_dai_ops pcm1681_dai_ops = { | |
204 | .set_fmt = pcm1681_set_dai_fmt, | |
205 | .hw_params = pcm1681_hw_params, | |
206 | .digital_mute = pcm1681_digital_mute, | |
207 | }; | |
208 | ||
209 | static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1); | |
210 | ||
211 | static const struct snd_kcontrol_new pcm1681_controls[] = { | |
212 | SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume", | |
213 | PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0, | |
214 | 0x7f, 0, pcm1681_dac_tlv), | |
215 | SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume", | |
216 | PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0, | |
217 | 0x7f, 0, pcm1681_dac_tlv), | |
218 | SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume", | |
219 | PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0, | |
220 | 0x7f, 0, pcm1681_dac_tlv), | |
221 | SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume", | |
222 | PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0, | |
223 | 0x7f, 0, pcm1681_dac_tlv), | |
224 | SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, | |
225 | pcm1681_get_deemph, pcm1681_put_deemph), | |
226 | }; | |
227 | ||
16695971 | 228 | static struct snd_soc_dai_driver pcm1681_dai = { |
95169d08 MB |
229 | .name = "pcm1681-hifi", |
230 | .playback = { | |
231 | .stream_name = "Playback", | |
232 | .channels_min = 2, | |
233 | .channels_max = 8, | |
234 | .rates = PCM1681_PCM_RATES, | |
235 | .formats = PCM1681_PCM_FORMATS, | |
236 | }, | |
237 | .ops = &pcm1681_dai_ops, | |
238 | }; | |
239 | ||
240 | #ifdef CONFIG_OF | |
241 | static const struct of_device_id pcm1681_dt_ids[] = { | |
242 | { .compatible = "ti,pcm1681", }, | |
243 | { } | |
244 | }; | |
245 | MODULE_DEVICE_TABLE(of, pcm1681_dt_ids); | |
246 | #endif | |
247 | ||
248 | static const struct regmap_config pcm1681_regmap = { | |
249 | .reg_bits = 8, | |
250 | .val_bits = 8, | |
251 | .max_register = ARRAY_SIZE(pcm1681_reg_defaults) + 1, | |
252 | .reg_defaults = pcm1681_reg_defaults, | |
253 | .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults), | |
254 | .writeable_reg = pcm1681_writeable_reg, | |
255 | .readable_reg = pcm1681_accessible_reg, | |
256 | }; | |
257 | ||
258 | static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = { | |
259 | .controls = pcm1681_controls, | |
260 | .num_controls = ARRAY_SIZE(pcm1681_controls), | |
261 | }; | |
262 | ||
263 | static const struct i2c_device_id pcm1681_i2c_id[] = { | |
264 | {"pcm1681", 0}, | |
265 | {} | |
266 | }; | |
267 | MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id); | |
268 | ||
269 | static int pcm1681_i2c_probe(struct i2c_client *client, | |
270 | const struct i2c_device_id *id) | |
271 | { | |
272 | int ret; | |
273 | struct pcm1681_private *priv; | |
274 | ||
275 | priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); | |
276 | if (!priv) | |
277 | return -ENOMEM; | |
278 | ||
279 | priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap); | |
280 | if (IS_ERR(priv->regmap)) { | |
281 | ret = PTR_ERR(priv->regmap); | |
282 | dev_err(&client->dev, "Failed to create regmap: %d\n", ret); | |
283 | return ret; | |
284 | } | |
285 | ||
286 | i2c_set_clientdata(client, priv); | |
287 | ||
288 | return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681, | |
289 | &pcm1681_dai, 1); | |
290 | } | |
291 | ||
292 | static int pcm1681_i2c_remove(struct i2c_client *client) | |
293 | { | |
294 | snd_soc_unregister_codec(&client->dev); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static struct i2c_driver pcm1681_i2c_driver = { | |
299 | .driver = { | |
300 | .name = "pcm1681", | |
301 | .owner = THIS_MODULE, | |
302 | .of_match_table = of_match_ptr(pcm1681_dt_ids), | |
303 | }, | |
304 | .id_table = pcm1681_i2c_id, | |
305 | .probe = pcm1681_i2c_probe, | |
306 | .remove = pcm1681_i2c_remove, | |
307 | }; | |
308 | ||
309 | module_i2c_driver(pcm1681_i2c_driver); | |
310 | ||
311 | MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver"); | |
312 | MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>"); | |
313 | MODULE_LICENSE("GPL"); |