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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> | |
193a4716 | 24 | #include <linux/of.h> |
95169d08 MB |
25 | #include <linux/of_device.h> |
26 | #include <linux/of_gpio.h> | |
27 | #include <sound/pcm.h> | |
28 | #include <sound/pcm_params.h> | |
29 | #include <sound/soc.h> | |
30 | #include <sound/tlv.h> | |
31 | ||
32 | #define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ | |
33 | SNDRV_PCM_FMTBIT_S24_LE) | |
34 | ||
35 | #define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \ | |
36 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
37 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ | |
38 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000) | |
39 | ||
40 | #define PCM1681_SOFT_MUTE_ALL 0xff | |
41 | #define PCM1681_DEEMPH_RATE_MASK 0x18 | |
42 | #define PCM1681_DEEMPH_MASK 0x01 | |
43 | ||
44 | #define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */ | |
45 | #define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */ | |
46 | #define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */ | |
47 | #define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */ | |
48 | #define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */ | |
49 | #define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */ | |
50 | ||
51 | static const struct reg_default pcm1681_reg_defaults[] = { | |
52 | { 0x01, 0xff }, | |
53 | { 0x02, 0xff }, | |
54 | { 0x03, 0xff }, | |
55 | { 0x04, 0xff }, | |
56 | { 0x05, 0xff }, | |
57 | { 0x06, 0xff }, | |
58 | { 0x07, 0x00 }, | |
59 | { 0x08, 0x00 }, | |
60 | { 0x09, 0x06 }, | |
61 | { 0x0A, 0x00 }, | |
62 | { 0x0B, 0xff }, | |
63 | { 0x0C, 0x0f }, | |
64 | { 0x0D, 0x00 }, | |
65 | { 0x10, 0xff }, | |
66 | { 0x11, 0xff }, | |
67 | { 0x12, 0x00 }, | |
68 | { 0x13, 0x00 }, | |
69 | }; | |
70 | ||
71 | static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg) | |
72 | { | |
73 | return !((reg == 0x00) || (reg == 0x0f)); | |
74 | } | |
75 | ||
76 | static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg) | |
77 | { | |
78 | return pcm1681_accessible_reg(dev, reg) && | |
79 | (reg != PCM1681_ZERO_DETECT_STATUS); | |
80 | } | |
81 | ||
82 | struct pcm1681_private { | |
83 | struct regmap *regmap; | |
84 | unsigned int format; | |
85 | /* Current deemphasis status */ | |
86 | unsigned int deemph; | |
87 | /* Current rate for deemphasis control */ | |
88 | unsigned int rate; | |
89 | }; | |
90 | ||
91 | static const int pcm1681_deemph[] = { 44100, 48000, 32000 }; | |
92 | ||
93 | static int pcm1681_set_deemph(struct snd_soc_codec *codec) | |
94 | { | |
95 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
96 | int i = 0, val = -1, enable = 0; | |
97 | ||
48f403be AL |
98 | if (priv->deemph) { |
99 | for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) { | |
100 | if (pcm1681_deemph[i] == priv->rate) { | |
95169d08 | 101 | val = i; |
48f403be AL |
102 | break; |
103 | } | |
104 | } | |
105 | } | |
95169d08 MB |
106 | |
107 | if (val != -1) { | |
108 | regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, | |
fa8173a3 | 109 | PCM1681_DEEMPH_RATE_MASK, val << 3); |
95169d08 | 110 | enable = 1; |
48f403be | 111 | } else { |
95169d08 | 112 | enable = 0; |
48f403be | 113 | } |
95169d08 MB |
114 | |
115 | /* enable/disable deemphasis functionality */ | |
116 | return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, | |
117 | PCM1681_DEEMPH_MASK, enable); | |
118 | } | |
119 | ||
120 | static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol, | |
121 | struct snd_ctl_elem_value *ucontrol) | |
122 | { | |
ea53bf77 | 123 | struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); |
95169d08 MB |
124 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); |
125 | ||
d7f58db4 | 126 | ucontrol->value.integer.value[0] = priv->deemph; |
95169d08 MB |
127 | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol, | |
132 | struct snd_ctl_elem_value *ucontrol) | |
133 | { | |
ea53bf77 | 134 | struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); |
95169d08 MB |
135 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); |
136 | ||
d7f58db4 | 137 | priv->deemph = ucontrol->value.integer.value[0]; |
95169d08 MB |
138 | |
139 | return pcm1681_set_deemph(codec); | |
140 | } | |
141 | ||
142 | static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
143 | unsigned int format) | |
144 | { | |
145 | struct snd_soc_codec *codec = codec_dai->codec; | |
146 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
147 | ||
148 | /* The PCM1681 can only be slave to all clocks */ | |
149 | if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { | |
150 | dev_err(codec->dev, "Invalid clocking mode\n"); | |
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | priv->format = format; | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute) | |
160 | { | |
161 | struct snd_soc_codec *codec = dai->codec; | |
162 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
163 | int val; | |
164 | ||
165 | if (mute) | |
166 | val = PCM1681_SOFT_MUTE_ALL; | |
167 | else | |
168 | val = 0; | |
169 | ||
170 | return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val); | |
171 | } | |
172 | ||
173 | static int pcm1681_hw_params(struct snd_pcm_substream *substream, | |
174 | struct snd_pcm_hw_params *params, | |
175 | struct snd_soc_dai *dai) | |
176 | { | |
177 | struct snd_soc_codec *codec = dai->codec; | |
178 | struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec); | |
179 | int val = 0, ret; | |
95169d08 MB |
180 | |
181 | priv->rate = params_rate(params); | |
182 | ||
183 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
184 | case SND_SOC_DAIFMT_RIGHT_J: | |
50a68fb4 MB |
185 | switch (params_width(params)) { |
186 | case 24: | |
187 | val = 0; | |
188 | break; | |
189 | case 16: | |
190 | val = 3; | |
191 | break; | |
192 | default: | |
193 | return -EINVAL; | |
194 | } | |
95169d08 MB |
195 | break; |
196 | case SND_SOC_DAIFMT_I2S: | |
197 | val = 0x04; | |
198 | break; | |
199 | case SND_SOC_DAIFMT_LEFT_J: | |
200 | val = 0x05; | |
201 | break; | |
202 | default: | |
203 | dev_err(codec->dev, "Invalid DAI format\n"); | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val); | |
208 | if (ret < 0) | |
209 | return ret; | |
210 | ||
211 | return pcm1681_set_deemph(codec); | |
212 | } | |
213 | ||
214 | static const struct snd_soc_dai_ops pcm1681_dai_ops = { | |
215 | .set_fmt = pcm1681_set_dai_fmt, | |
216 | .hw_params = pcm1681_hw_params, | |
217 | .digital_mute = pcm1681_digital_mute, | |
218 | }; | |
219 | ||
b9281f99 MB |
220 | static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = { |
221 | SND_SOC_DAPM_OUTPUT("VOUT1"), | |
222 | SND_SOC_DAPM_OUTPUT("VOUT2"), | |
223 | SND_SOC_DAPM_OUTPUT("VOUT3"), | |
224 | SND_SOC_DAPM_OUTPUT("VOUT4"), | |
225 | SND_SOC_DAPM_OUTPUT("VOUT5"), | |
226 | SND_SOC_DAPM_OUTPUT("VOUT6"), | |
227 | SND_SOC_DAPM_OUTPUT("VOUT7"), | |
228 | SND_SOC_DAPM_OUTPUT("VOUT8"), | |
229 | }; | |
230 | ||
231 | static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = { | |
232 | { "VOUT1", NULL, "Playback" }, | |
233 | { "VOUT2", NULL, "Playback" }, | |
234 | { "VOUT3", NULL, "Playback" }, | |
235 | { "VOUT4", NULL, "Playback" }, | |
236 | { "VOUT5", NULL, "Playback" }, | |
237 | { "VOUT6", NULL, "Playback" }, | |
238 | { "VOUT7", NULL, "Playback" }, | |
239 | { "VOUT8", NULL, "Playback" }, | |
240 | }; | |
241 | ||
95169d08 MB |
242 | static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1); |
243 | ||
244 | static const struct snd_kcontrol_new pcm1681_controls[] = { | |
245 | SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume", | |
246 | PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0, | |
247 | 0x7f, 0, pcm1681_dac_tlv), | |
248 | SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume", | |
249 | PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0, | |
250 | 0x7f, 0, pcm1681_dac_tlv), | |
251 | SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume", | |
252 | PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0, | |
253 | 0x7f, 0, pcm1681_dac_tlv), | |
254 | SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume", | |
255 | PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0, | |
256 | 0x7f, 0, pcm1681_dac_tlv), | |
257 | SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, | |
258 | pcm1681_get_deemph, pcm1681_put_deemph), | |
259 | }; | |
260 | ||
16695971 | 261 | static struct snd_soc_dai_driver pcm1681_dai = { |
95169d08 MB |
262 | .name = "pcm1681-hifi", |
263 | .playback = { | |
264 | .stream_name = "Playback", | |
265 | .channels_min = 2, | |
266 | .channels_max = 8, | |
267 | .rates = PCM1681_PCM_RATES, | |
268 | .formats = PCM1681_PCM_FORMATS, | |
269 | }, | |
270 | .ops = &pcm1681_dai_ops, | |
271 | }; | |
272 | ||
273 | #ifdef CONFIG_OF | |
274 | static const struct of_device_id pcm1681_dt_ids[] = { | |
275 | { .compatible = "ti,pcm1681", }, | |
276 | { } | |
277 | }; | |
278 | MODULE_DEVICE_TABLE(of, pcm1681_dt_ids); | |
279 | #endif | |
280 | ||
281 | static const struct regmap_config pcm1681_regmap = { | |
282 | .reg_bits = 8, | |
283 | .val_bits = 8, | |
64256ac6 | 284 | .max_register = 0x13, |
95169d08 MB |
285 | .reg_defaults = pcm1681_reg_defaults, |
286 | .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults), | |
287 | .writeable_reg = pcm1681_writeable_reg, | |
288 | .readable_reg = pcm1681_accessible_reg, | |
289 | }; | |
290 | ||
291 | static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = { | |
292 | .controls = pcm1681_controls, | |
293 | .num_controls = ARRAY_SIZE(pcm1681_controls), | |
b9281f99 MB |
294 | .dapm_widgets = pcm1681_dapm_widgets, |
295 | .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets), | |
296 | .dapm_routes = pcm1681_dapm_routes, | |
297 | .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes), | |
95169d08 MB |
298 | }; |
299 | ||
300 | static const struct i2c_device_id pcm1681_i2c_id[] = { | |
301 | {"pcm1681", 0}, | |
302 | {} | |
303 | }; | |
304 | MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id); | |
305 | ||
306 | static int pcm1681_i2c_probe(struct i2c_client *client, | |
307 | const struct i2c_device_id *id) | |
308 | { | |
309 | int ret; | |
310 | struct pcm1681_private *priv; | |
311 | ||
312 | priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); | |
313 | if (!priv) | |
314 | return -ENOMEM; | |
315 | ||
316 | priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap); | |
317 | if (IS_ERR(priv->regmap)) { | |
318 | ret = PTR_ERR(priv->regmap); | |
319 | dev_err(&client->dev, "Failed to create regmap: %d\n", ret); | |
320 | return ret; | |
321 | } | |
322 | ||
323 | i2c_set_clientdata(client, priv); | |
324 | ||
325 | return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681, | |
326 | &pcm1681_dai, 1); | |
327 | } | |
328 | ||
329 | static int pcm1681_i2c_remove(struct i2c_client *client) | |
330 | { | |
331 | snd_soc_unregister_codec(&client->dev); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static struct i2c_driver pcm1681_i2c_driver = { | |
336 | .driver = { | |
337 | .name = "pcm1681", | |
95169d08 MB |
338 | .of_match_table = of_match_ptr(pcm1681_dt_ids), |
339 | }, | |
340 | .id_table = pcm1681_i2c_id, | |
341 | .probe = pcm1681_i2c_probe, | |
342 | .remove = pcm1681_i2c_remove, | |
343 | }; | |
344 | ||
345 | module_i2c_driver(pcm1681_i2c_driver); | |
346 | ||
347 | MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver"); | |
348 | MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>"); | |
349 | MODULE_LICENSE("GPL"); |