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Linux/sound/soc/codecs/tfa9879.c

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  1 /*
  2  * tfa9879.c  --  driver for NXP Semiconductors TFA9879
  3  *
  4  * Copyright (C) 2014 Axentia Technologies AB
  5  * Author: Peter Rosin <peda@axentia.se>
  6  *
  7  *  This program is free software; you can redistribute  it and/or modify it
  8  *  under  the terms of  the GNU General  Public License as published by the
  9  *  Free Software Foundation;  either version 2 of the  License, or (at your
 10  *  option) any later version.
 11  *
 12  */
 13 
 14 #include <linux/module.h>
 15 #include <linux/init.h>
 16 #include <linux/i2c.h>
 17 #include <linux/regmap.h>
 18 #include <sound/soc.h>
 19 #include <sound/tlv.h>
 20 #include <sound/pcm_params.h>
 21 
 22 #include "tfa9879.h"
 23 
 24 struct tfa9879_priv {
 25         struct regmap *regmap;
 26         int lsb_justified;
 27 };
 28 
 29 static int tfa9879_hw_params(struct snd_pcm_substream *substream,
 30                              struct snd_pcm_hw_params *params,
 31                              struct snd_soc_dai *dai)
 32 {
 33         struct snd_soc_codec *codec = dai->codec;
 34         struct tfa9879_priv *tfa9879 = snd_soc_codec_get_drvdata(codec);
 35         int fs;
 36         int i2s_set = 0;
 37 
 38         switch (params_rate(params)) {
 39         case 8000:
 40                 fs = TFA9879_I2S_FS_8000;
 41                 break;
 42         case 11025:
 43                 fs = TFA9879_I2S_FS_11025;
 44                 break;
 45         case 12000:
 46                 fs = TFA9879_I2S_FS_12000;
 47                 break;
 48         case 16000:
 49                 fs = TFA9879_I2S_FS_16000;
 50                 break;
 51         case 22050:
 52                 fs = TFA9879_I2S_FS_22050;
 53                 break;
 54         case 24000:
 55                 fs = TFA9879_I2S_FS_24000;
 56                 break;
 57         case 32000:
 58                 fs = TFA9879_I2S_FS_32000;
 59                 break;
 60         case 44100:
 61                 fs = TFA9879_I2S_FS_44100;
 62                 break;
 63         case 48000:
 64                 fs = TFA9879_I2S_FS_48000;
 65                 break;
 66         case 64000:
 67                 fs = TFA9879_I2S_FS_64000;
 68                 break;
 69         case 88200:
 70                 fs = TFA9879_I2S_FS_88200;
 71                 break;
 72         case 96000:
 73                 fs = TFA9879_I2S_FS_96000;
 74                 break;
 75         default:
 76                 return -EINVAL;
 77         }
 78 
 79         switch (params_width(params)) {
 80         case 16:
 81                 i2s_set = TFA9879_I2S_SET_LSB_J_16;
 82                 break;
 83         case 24:
 84                 i2s_set = TFA9879_I2S_SET_LSB_J_24;
 85                 break;
 86         default:
 87                 return -EINVAL;
 88         }
 89 
 90         if (tfa9879->lsb_justified)
 91                 snd_soc_update_bits(codec, TFA9879_SERIAL_INTERFACE_1,
 92                                     TFA9879_I2S_SET_MASK,
 93                                     i2s_set << TFA9879_I2S_SET_SHIFT);
 94 
 95         snd_soc_update_bits(codec, TFA9879_SERIAL_INTERFACE_1,
 96                             TFA9879_I2S_FS_MASK,
 97                             fs << TFA9879_I2S_FS_SHIFT);
 98         return 0;
 99 }
100 
101 static int tfa9879_digital_mute(struct snd_soc_dai *dai, int mute)
102 {
103         struct snd_soc_codec *codec = dai->codec;
104 
105         snd_soc_update_bits(codec, TFA9879_MISC_CONTROL,
106                             TFA9879_S_MUTE_MASK,
107                             !!mute << TFA9879_S_MUTE_SHIFT);
108 
109         return 0;
110 }
111 
112 static int tfa9879_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
113 {
114         struct snd_soc_codec *codec = dai->codec;
115         struct tfa9879_priv *tfa9879 = snd_soc_codec_get_drvdata(codec);
116         int i2s_set;
117         int sck_pol;
118 
119         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
120         case SND_SOC_DAIFMT_CBS_CFS:
121                 break;
122         default:
123                 return -EINVAL;
124         }
125 
126         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
127         case SND_SOC_DAIFMT_NB_NF:
128                 sck_pol = TFA9879_SCK_POL_NORMAL;
129                 break;
130         case SND_SOC_DAIFMT_IB_NF:
131                 sck_pol = TFA9879_SCK_POL_INVERSE;
132                 break;
133         default:
134                 return -EINVAL;
135         }
136 
137         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
138         case SND_SOC_DAIFMT_I2S:
139                 tfa9879->lsb_justified = 0;
140                 i2s_set = TFA9879_I2S_SET_I2S_24;
141                 break;
142         case SND_SOC_DAIFMT_LEFT_J:
143                 tfa9879->lsb_justified = 0;
144                 i2s_set = TFA9879_I2S_SET_MSB_J_24;
145                 break;
146         case SND_SOC_DAIFMT_RIGHT_J:
147                 tfa9879->lsb_justified = 1;
148                 i2s_set = TFA9879_I2S_SET_LSB_J_24;
149                 break;
150         default:
151                 return -EINVAL;
152         }
153 
154         snd_soc_update_bits(codec, TFA9879_SERIAL_INTERFACE_1,
155                             TFA9879_SCK_POL_MASK,
156                             sck_pol << TFA9879_SCK_POL_SHIFT);
157         snd_soc_update_bits(codec, TFA9879_SERIAL_INTERFACE_1,
158                             TFA9879_I2S_SET_MASK,
159                             i2s_set << TFA9879_I2S_SET_SHIFT);
160         return 0;
161 }
162 
163 static const struct reg_default tfa9879_regs[] = {
164         { TFA9879_DEVICE_CONTROL,       0x0000 }, /* 0x00 */
165         { TFA9879_SERIAL_INTERFACE_1,   0x0a18 }, /* 0x01 */
166         { TFA9879_PCM_IOM2_FORMAT_1,    0x0007 }, /* 0x02 */
167         { TFA9879_SERIAL_INTERFACE_2,   0x0a18 }, /* 0x03 */
168         { TFA9879_PCM_IOM2_FORMAT_2,    0x0007 }, /* 0x04 */
169         { TFA9879_EQUALIZER_A1,         0x59dd }, /* 0x05 */
170         { TFA9879_EQUALIZER_A2,         0xc63e }, /* 0x06 */
171         { TFA9879_EQUALIZER_B1,         0x651a }, /* 0x07 */
172         { TFA9879_EQUALIZER_B2,         0xe53e }, /* 0x08 */
173         { TFA9879_EQUALIZER_C1,         0x4616 }, /* 0x09 */
174         { TFA9879_EQUALIZER_C2,         0xd33e }, /* 0x0a */
175         { TFA9879_EQUALIZER_D1,         0x4df3 }, /* 0x0b */
176         { TFA9879_EQUALIZER_D2,         0xea3e }, /* 0x0c */
177         { TFA9879_EQUALIZER_E1,         0x5ee0 }, /* 0x0d */
178         { TFA9879_EQUALIZER_E2,         0xf93e }, /* 0x0e */
179         { TFA9879_BYPASS_CONTROL,       0x0093 }, /* 0x0f */
180         { TFA9879_DYNAMIC_RANGE_COMPR,  0x92ba }, /* 0x10 */
181         { TFA9879_BASS_TREBLE,          0x12a5 }, /* 0x11 */
182         { TFA9879_HIGH_PASS_FILTER,     0x0004 }, /* 0x12 */
183         { TFA9879_VOLUME_CONTROL,       0x10bd }, /* 0x13 */
184         { TFA9879_MISC_CONTROL,         0x0000 }, /* 0x14 */
185 };
186 
187 static bool tfa9879_volatile_reg(struct device *dev, unsigned int reg)
188 {
189         return reg == TFA9879_MISC_STATUS;
190 }
191 
192 static const DECLARE_TLV_DB_SCALE(volume_tlv, -7050, 50, 1);
193 static const DECLARE_TLV_DB_SCALE(tb_gain_tlv, -1800, 200, 0);
194 static const char * const tb_freq_text[] = {
195         "Low", "Mid", "High"
196 };
197 static const struct soc_enum treble_freq_enum =
198         SOC_ENUM_SINGLE(TFA9879_BASS_TREBLE, TFA9879_F_TRBLE_SHIFT,
199                         ARRAY_SIZE(tb_freq_text), tb_freq_text);
200 static const struct soc_enum bass_freq_enum =
201         SOC_ENUM_SINGLE(TFA9879_BASS_TREBLE, TFA9879_F_BASS_SHIFT,
202                         ARRAY_SIZE(tb_freq_text), tb_freq_text);
203 
204 static const struct snd_kcontrol_new tfa9879_controls[] = {
205         SOC_SINGLE_TLV("PCM Playback Volume", TFA9879_VOLUME_CONTROL,
206                        TFA9879_VOL_SHIFT, 0xbd, 1, volume_tlv),
207         SOC_SINGLE_TLV("Treble Volume", TFA9879_BASS_TREBLE,
208                        TFA9879_G_TRBLE_SHIFT, 18, 0, tb_gain_tlv),
209         SOC_SINGLE_TLV("Bass Volume", TFA9879_BASS_TREBLE,
210                        TFA9879_G_BASS_SHIFT, 18, 0, tb_gain_tlv),
211         SOC_ENUM("Treble Corner Freq", treble_freq_enum),
212         SOC_ENUM("Bass Corner Freq", bass_freq_enum),
213 };
214 
215 static const struct snd_soc_dapm_widget tfa9879_dapm_widgets[] = {
216 SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0),
217 SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0),
218 SND_SOC_DAPM_DAC("DAC", NULL, TFA9879_DEVICE_CONTROL, TFA9879_OPMODE_SHIFT, 0),
219 SND_SOC_DAPM_OUTPUT("LINEOUT"),
220 SND_SOC_DAPM_SUPPLY("POWER", TFA9879_DEVICE_CONTROL, TFA9879_POWERUP_SHIFT, 0,
221                     NULL, 0),
222 };
223 
224 static const struct snd_soc_dapm_route tfa9879_dapm_routes[] = {
225         { "DAC", NULL, "AIFINL" },
226         { "DAC", NULL, "AIFINR" },
227 
228         { "LINEOUT", NULL, "DAC" },
229 
230         { "DAC", NULL, "POWER" },
231 };
232 
233 static const struct snd_soc_codec_driver tfa9879_codec = {
234         .controls = tfa9879_controls,
235         .num_controls = ARRAY_SIZE(tfa9879_controls),
236 
237         .dapm_widgets = tfa9879_dapm_widgets,
238         .num_dapm_widgets = ARRAY_SIZE(tfa9879_dapm_widgets),
239         .dapm_routes = tfa9879_dapm_routes,
240         .num_dapm_routes = ARRAY_SIZE(tfa9879_dapm_routes),
241 };
242 
243 static const struct regmap_config tfa9879_regmap = {
244         .reg_bits = 8,
245         .val_bits = 16,
246 
247         .volatile_reg = tfa9879_volatile_reg,
248         .max_register = TFA9879_MISC_STATUS,
249         .reg_defaults = tfa9879_regs,
250         .num_reg_defaults = ARRAY_SIZE(tfa9879_regs),
251         .cache_type = REGCACHE_RBTREE,
252 };
253 
254 static const struct snd_soc_dai_ops tfa9879_dai_ops = {
255         .hw_params = tfa9879_hw_params,
256         .digital_mute = tfa9879_digital_mute,
257         .set_fmt = tfa9879_set_fmt,
258 };
259 
260 #define TFA9879_RATES SNDRV_PCM_RATE_8000_96000
261 
262 #define TFA9879_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
263                          SNDRV_PCM_FMTBIT_S24_LE)
264 
265 static struct snd_soc_dai_driver tfa9879_dai = {
266         .name = "tfa9879-hifi",
267         .playback = {
268                 .stream_name = "Playback",
269                 .channels_min = 2,
270                 .channels_max = 2,
271                 .rates = TFA9879_RATES,
272                 .formats = TFA9879_FORMATS, },
273         .ops = &tfa9879_dai_ops,
274 };
275 
276 static int tfa9879_i2c_probe(struct i2c_client *i2c,
277                              const struct i2c_device_id *id)
278 {
279         struct tfa9879_priv *tfa9879;
280         int i;
281 
282         tfa9879 = devm_kzalloc(&i2c->dev, sizeof(*tfa9879), GFP_KERNEL);
283         if (!tfa9879)
284                 return -ENOMEM;
285 
286         i2c_set_clientdata(i2c, tfa9879);
287 
288         tfa9879->regmap = devm_regmap_init_i2c(i2c, &tfa9879_regmap);
289         if (IS_ERR(tfa9879->regmap))
290                 return PTR_ERR(tfa9879->regmap);
291 
292         /* Ensure the device is in reset state */
293         for (i = 0; i < ARRAY_SIZE(tfa9879_regs); i++)
294                 regmap_write(tfa9879->regmap,
295                              tfa9879_regs[i].reg, tfa9879_regs[i].def);
296 
297         return snd_soc_register_codec(&i2c->dev, &tfa9879_codec,
298                                       &tfa9879_dai, 1);
299 }
300 
301 static int tfa9879_i2c_remove(struct i2c_client *client)
302 {
303         snd_soc_unregister_codec(&client->dev);
304 
305         return 0;
306 }
307 
308 static const struct i2c_device_id tfa9879_i2c_id[] = {
309         { "tfa9879", 0 },
310         { }
311 };
312 MODULE_DEVICE_TABLE(i2c, tfa9879_i2c_id);
313 
314 static struct i2c_driver tfa9879_i2c_driver = {
315         .driver = {
316                 .name = "tfa9879",
317         },
318         .probe = tfa9879_i2c_probe,
319         .remove = tfa9879_i2c_remove,
320         .id_table = tfa9879_i2c_id,
321 };
322 
323 module_i2c_driver(tfa9879_i2c_driver);
324 
325 MODULE_DESCRIPTION("ASoC NXP Semiconductors TFA9879 driver");
326 MODULE_AUTHOR("Peter Rosin <peda@axentia.se>");
327 MODULE_LICENSE("GPL");
328 

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