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Linux/sound/soc/codecs/ak5558.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 //
  3 // Audio driver for AK5558 ADC
  4 //
  5 // Copyright (C) 2015 Asahi Kasei Microdevices Corporation
  6 // Copyright 2018 NXP
  7 
  8 #include <linux/delay.h>
  9 #include <linux/gpio/consumer.h>
 10 #include <linux/i2c.h>
 11 #include <linux/module.h>
 12 #include <linux/pm_runtime.h>
 13 #include <linux/regmap.h>
 14 #include <linux/slab.h>
 15 
 16 #include <sound/initval.h>
 17 #include <sound/pcm.h>
 18 #include <sound/pcm_params.h>
 19 #include <sound/soc.h>
 20 #include <sound/soc-dapm.h>
 21 #include <sound/tlv.h>
 22 
 23 #include "ak5558.h"
 24 
 25 /* AK5558 Codec Private Data */
 26 struct ak5558_priv {
 27         struct snd_soc_component component;
 28         struct regmap *regmap;
 29         struct i2c_client *i2c;
 30         struct gpio_desc *reset_gpiod; /* Reset & Power down GPIO */
 31         int slots;
 32         int slot_width;
 33 };
 34 
 35 /* ak5558 register cache & default register settings */
 36 static const struct reg_default ak5558_reg[] = {
 37         { 0x0, 0xFF },  /*      0x00    AK5558_00_POWER_MANAGEMENT1     */
 38         { 0x1, 0x01 },  /*      0x01    AK5558_01_POWER_MANAGEMENT2     */
 39         { 0x2, 0x01 },  /*      0x02    AK5558_02_CONTROL1              */
 40         { 0x3, 0x00 },  /*      0x03    AK5558_03_CONTROL2              */
 41         { 0x4, 0x00 },  /*      0x04    AK5558_04_CONTROL3              */
 42         { 0x5, 0x00 }   /*      0x05    AK5558_05_DSD                   */
 43 };
 44 
 45 static const char * const mono_texts[] = {
 46         "8 Slot", "2 Slot", "4 Slot", "1 Slot",
 47 };
 48 
 49 static const struct soc_enum ak5558_mono_enum[] = {
 50         SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
 51                         ARRAY_SIZE(mono_texts), mono_texts),
 52 };
 53 
 54 static const char * const digfil_texts[] = {
 55         "Sharp Roll-Off", "Show Roll-Off",
 56         "Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
 57 };
 58 
 59 static const struct soc_enum ak5558_adcset_enum[] = {
 60         SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
 61                         ARRAY_SIZE(digfil_texts), digfil_texts),
 62 };
 63 
 64 static const struct snd_kcontrol_new ak5558_snd_controls[] = {
 65         SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
 66         SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
 67 };
 68 
 69 static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
 70         /* Analog Input */
 71         SND_SOC_DAPM_INPUT("AIN1"),
 72         SND_SOC_DAPM_INPUT("AIN2"),
 73         SND_SOC_DAPM_INPUT("AIN3"),
 74         SND_SOC_DAPM_INPUT("AIN4"),
 75         SND_SOC_DAPM_INPUT("AIN5"),
 76         SND_SOC_DAPM_INPUT("AIN6"),
 77         SND_SOC_DAPM_INPUT("AIN7"),
 78         SND_SOC_DAPM_INPUT("AIN8"),
 79 
 80         SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
 81         SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
 82         SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
 83         SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
 84         SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
 85         SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
 86         SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
 87         SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),
 88 
 89         SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
 90 };
 91 
 92 static const struct snd_soc_dapm_route ak5558_intercon[] = {
 93         {"ADC Ch1", NULL, "AIN1"},
 94         {"SDTO", NULL, "ADC Ch1"},
 95 
 96         {"ADC Ch2", NULL, "AIN2"},
 97         {"SDTO", NULL, "ADC Ch2"},
 98 
 99         {"ADC Ch3", NULL, "AIN3"},
100         {"SDTO", NULL, "ADC Ch3"},
101 
102         {"ADC Ch4", NULL, "AIN4"},
103         {"SDTO", NULL, "ADC Ch4"},
104 
105         {"ADC Ch5", NULL, "AIN5"},
106         {"SDTO", NULL, "ADC Ch5"},
107 
108         {"ADC Ch6", NULL, "AIN6"},
109         {"SDTO", NULL, "ADC Ch6"},
110 
111         {"ADC Ch7", NULL, "AIN7"},
112         {"SDTO", NULL, "ADC Ch7"},
113 
114         {"ADC Ch8", NULL, "AIN8"},
115         {"SDTO", NULL, "ADC Ch8"},
116 };
117 
118 static int ak5558_set_mcki(struct snd_soc_component *component)
119 {
120         return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
121                                    AK5558_CKS_AUTO);
122 }
123 
124 static int ak5558_hw_params(struct snd_pcm_substream *substream,
125                             struct snd_pcm_hw_params *params,
126                             struct snd_soc_dai *dai)
127 {
128         struct snd_soc_component *component = dai->component;
129         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
130         u8 bits;
131         int pcm_width = max(params_physical_width(params), ak5558->slot_width);
132 
133         switch (pcm_width) {
134         case 16:
135                 bits = AK5558_DIF_24BIT_MODE;
136                 break;
137         case 32:
138                 bits = AK5558_DIF_32BIT_MODE;
139                 break;
140         default:
141                 return -EINVAL;
142         }
143 
144         snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);
145 
146         return 0;
147 }
148 
149 static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
150 {
151         struct snd_soc_component *component = dai->component;
152         u8 format;
153 
154         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
155         case SND_SOC_DAIFMT_CBS_CFS:
156                 break;
157         case SND_SOC_DAIFMT_CBM_CFM:
158                 break;
159         case SND_SOC_DAIFMT_CBS_CFM:
160         case SND_SOC_DAIFMT_CBM_CFS:
161         default:
162                 dev_err(dai->dev, "Clock mode unsupported");
163                 return -EINVAL;
164         }
165 
166         /* set master/slave audio interface */
167         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
168         case SND_SOC_DAIFMT_I2S:
169                 format = AK5558_DIF_I2S_MODE;
170                 break;
171         case SND_SOC_DAIFMT_LEFT_J:
172                 format = AK5558_DIF_MSB_MODE;
173                 break;
174         case SND_SOC_DAIFMT_DSP_B:
175                 format = AK5558_DIF_MSB_MODE;
176                 break;
177         default:
178                 return -EINVAL;
179         }
180 
181         snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);
182 
183         return 0;
184 }
185 
186 static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
187                                unsigned int rx_mask, int slots,
188                                int slot_width)
189 {
190         struct snd_soc_component *component = dai->component;
191         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
192         int tdm_mode;
193 
194         ak5558->slots = slots;
195         ak5558->slot_width = slot_width;
196 
197         switch (slots * slot_width) {
198         case 128:
199                 tdm_mode = AK5558_MODE_TDM128;
200                 break;
201         case 256:
202                 tdm_mode = AK5558_MODE_TDM256;
203                 break;
204         case 512:
205                 tdm_mode = AK5558_MODE_TDM512;
206                 break;
207         default:
208                 tdm_mode = AK5558_MODE_NORMAL;
209                 break;
210         }
211 
212         snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
213                             tdm_mode);
214         return 0;
215 }
216 
217 #define AK5558_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE |\
218                          SNDRV_PCM_FMTBIT_S24_LE |\
219                          SNDRV_PCM_FMTBIT_S32_LE)
220 
221 static const unsigned int ak5558_rates[] = {
222         8000, 11025,  16000, 22050,
223         32000, 44100, 48000, 88200,
224         96000, 176400, 192000, 352800,
225         384000, 705600, 768000, 1411200,
226         2822400,
227 };
228 
229 static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
230         .count = ARRAY_SIZE(ak5558_rates),
231         .list = ak5558_rates,
232 };
233 
234 static int ak5558_startup(struct snd_pcm_substream *substream,
235                           struct snd_soc_dai *dai)
236 {
237         return snd_pcm_hw_constraint_list(substream->runtime, 0,
238                                           SNDRV_PCM_HW_PARAM_RATE,
239                                           &ak5558_rate_constraints);
240 }
241 
242 static const struct snd_soc_dai_ops ak5558_dai_ops = {
243         .startup        = ak5558_startup,
244         .hw_params      = ak5558_hw_params,
245 
246         .set_fmt        = ak5558_set_dai_fmt,
247         .set_tdm_slot   = ak5558_set_tdm_slot,
248 };
249 
250 static struct snd_soc_dai_driver ak5558_dai = {
251         .name = "ak5558-aif",
252         .capture = {
253                 .stream_name = "Capture",
254                 .channels_min = 1,
255                 .channels_max = 8,
256                 .rates = SNDRV_PCM_RATE_KNOT,
257                 .formats = AK5558_FORMATS,
258         },
259         .ops = &ak5558_dai_ops,
260 };
261 
262 static void ak5558_power_off(struct ak5558_priv *ak5558)
263 {
264         if (!ak5558->reset_gpiod)
265                 return;
266 
267         gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
268         usleep_range(1000, 2000);
269 }
270 
271 static void ak5558_power_on(struct ak5558_priv *ak5558)
272 {
273         if (!ak5558->reset_gpiod)
274                 return;
275 
276         gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
277         usleep_range(1000, 2000);
278 }
279 
280 static int ak5558_probe(struct snd_soc_component *component)
281 {
282         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
283 
284         ak5558_power_on(ak5558);
285         return ak5558_set_mcki(component);
286 }
287 
288 static void ak5558_remove(struct snd_soc_component *component)
289 {
290         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
291 
292         ak5558_power_off(ak5558);
293 }
294 
295 static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
296 {
297         struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
298 
299         regcache_cache_only(ak5558->regmap, true);
300         ak5558_power_off(ak5558);
301 
302         return 0;
303 }
304 
305 static int __maybe_unused ak5558_runtime_resume(struct device *dev)
306 {
307         struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
308 
309         ak5558_power_off(ak5558);
310         ak5558_power_on(ak5558);
311 
312         regcache_cache_only(ak5558->regmap, false);
313         regcache_mark_dirty(ak5558->regmap);
314 
315         return regcache_sync(ak5558->regmap);
316 }
317 
318 static const struct dev_pm_ops ak5558_pm = {
319         SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
320         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
321                                 pm_runtime_force_resume)
322 };
323 
324 static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
325         .probe                  = ak5558_probe,
326         .remove                 = ak5558_remove,
327         .controls               = ak5558_snd_controls,
328         .num_controls           = ARRAY_SIZE(ak5558_snd_controls),
329         .dapm_widgets           = ak5558_dapm_widgets,
330         .num_dapm_widgets       = ARRAY_SIZE(ak5558_dapm_widgets),
331         .dapm_routes            = ak5558_intercon,
332         .num_dapm_routes        = ARRAY_SIZE(ak5558_intercon),
333         .idle_bias_on           = 1,
334         .use_pmdown_time        = 1,
335         .endianness             = 1,
336         .non_legacy_dai_naming  = 1,
337 };
338 
339 static const struct regmap_config ak5558_regmap = {
340         .reg_bits = 8,
341         .val_bits = 8,
342 
343         .max_register = AK5558_05_DSD,
344         .reg_defaults = ak5558_reg,
345         .num_reg_defaults = ARRAY_SIZE(ak5558_reg),
346         .cache_type = REGCACHE_RBTREE,
347 };
348 
349 static int ak5558_i2c_probe(struct i2c_client *i2c)
350 {
351         struct ak5558_priv *ak5558;
352         int ret = 0;
353 
354         ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
355         if (!ak5558)
356                 return -ENOMEM;
357 
358         ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
359         if (IS_ERR(ak5558->regmap))
360                 return PTR_ERR(ak5558->regmap);
361 
362         i2c_set_clientdata(i2c, ak5558);
363         ak5558->i2c = i2c;
364 
365         ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
366                                                       GPIOD_OUT_LOW);
367         if (IS_ERR(ak5558->reset_gpiod))
368                 return PTR_ERR(ak5558->reset_gpiod);
369 
370         ret = devm_snd_soc_register_component(&i2c->dev,
371                                      &soc_codec_dev_ak5558,
372                                      &ak5558_dai, 1);
373         if (ret)
374                 return ret;
375 
376         pm_runtime_enable(&i2c->dev);
377 
378         return 0;
379 }
380 
381 static int ak5558_i2c_remove(struct i2c_client *i2c)
382 {
383         pm_runtime_disable(&i2c->dev);
384 
385         return 0;
386 }
387 
388 static const struct of_device_id ak5558_i2c_dt_ids[] = {
389         { .compatible = "asahi-kasei,ak5558"},
390         { }
391 };
392 
393 static struct i2c_driver ak5558_i2c_driver = {
394         .driver = {
395                 .name = "ak5558",
396                 .of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
397                 .pm = &ak5558_pm,
398         },
399         .probe_new = ak5558_i2c_probe,
400         .remove = ak5558_i2c_remove,
401 };
402 
403 module_i2c_driver(ak5558_i2c_driver);
404 
405 MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
406 MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
407 MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
408 MODULE_LICENSE("GPL v2");
409 

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