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Linux/sound/soc/codecs/cs35l32.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * cs35l32.c -- CS35L32 ALSA SoC audio driver
  4  *
  5  * Copyright 2014 CirrusLogic, Inc.
  6  *
  7  * Author: Brian Austin <brian.austin@cirrus.com>
  8  */
  9 
 10 #include <linux/module.h>
 11 #include <linux/moduleparam.h>
 12 #include <linux/kernel.h>
 13 #include <linux/init.h>
 14 #include <linux/delay.h>
 15 #include <linux/i2c.h>
 16 #include <linux/gpio.h>
 17 #include <linux/regmap.h>
 18 #include <linux/slab.h>
 19 #include <linux/platform_device.h>
 20 #include <linux/regulator/consumer.h>
 21 #include <linux/gpio/consumer.h>
 22 #include <linux/of_device.h>
 23 #include <sound/core.h>
 24 #include <sound/pcm.h>
 25 #include <sound/pcm_params.h>
 26 #include <sound/soc.h>
 27 #include <sound/soc-dapm.h>
 28 #include <sound/initval.h>
 29 #include <sound/tlv.h>
 30 #include <dt-bindings/sound/cs35l32.h>
 31 
 32 #include "cs35l32.h"
 33 
 34 #define CS35L32_NUM_SUPPLIES 2
 35 static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = {
 36         "VA",
 37         "VP",
 38 };
 39 
 40 struct  cs35l32_private {
 41         struct regmap *regmap;
 42         struct snd_soc_component *component;
 43         struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES];
 44         struct cs35l32_platform_data pdata;
 45         struct gpio_desc *reset_gpio;
 46 };
 47 
 48 static const struct reg_default cs35l32_reg_defaults[] = {
 49 
 50         { 0x06, 0x04 }, /* Power Ctl 1 */
 51         { 0x07, 0xE8 }, /* Power Ctl 2 */
 52         { 0x08, 0x40 }, /* Clock Ctl */
 53         { 0x09, 0x20 }, /* Low Battery Threshold */
 54         { 0x0A, 0x00 }, /* Voltage Monitor [RO] */
 55         { 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */
 56         { 0x0C, 0x07 }, /* IMON Scaling */
 57         { 0x0D, 0x03 }, /* Audio/LED Pwr Manager */
 58         { 0x0F, 0x20 }, /* Serial Port Control */
 59         { 0x10, 0x14 }, /* Class D Amp CTL */
 60         { 0x11, 0x00 }, /* Protection Release CTL */
 61         { 0x12, 0xFF }, /* Interrupt Mask 1 */
 62         { 0x13, 0xFF }, /* Interrupt Mask 2 */
 63         { 0x14, 0xFF }, /* Interrupt Mask 3 */
 64         { 0x19, 0x00 }, /* LED Flash Mode Current */
 65         { 0x1A, 0x00 }, /* LED Movie Mode Current */
 66         { 0x1B, 0x20 }, /* LED Flash Timer */
 67         { 0x1C, 0x00 }, /* LED Flash Inhibit Current */
 68 };
 69 
 70 static bool cs35l32_readable_register(struct device *dev, unsigned int reg)
 71 {
 72         switch (reg) {
 73         case CS35L32_DEVID_AB ... CS35L32_AUDIO_LED_MNGR:
 74         case CS35L32_ADSP_CTL ... CS35L32_FLASH_INHIBIT:
 75                 return true;
 76         default:
 77                 return false;
 78         }
 79 }
 80 
 81 static bool cs35l32_volatile_register(struct device *dev, unsigned int reg)
 82 {
 83         switch (reg) {
 84         case CS35L32_DEVID_AB ... CS35L32_REV_ID:
 85         case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
 86                 return true;
 87         default:
 88                 return false;
 89         }
 90 }
 91 
 92 static bool cs35l32_precious_register(struct device *dev, unsigned int reg)
 93 {
 94         switch (reg) {
 95         case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
 96                 return true;
 97         default:
 98                 return false;
 99         }
100 }
101 
102 static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0);
103 
104 static const struct snd_kcontrol_new imon_ctl =
105         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1);
106 
107 static const struct snd_kcontrol_new vmon_ctl =
108         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1);
109 
110 static const struct snd_kcontrol_new vpmon_ctl =
111         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1);
112 
113 static const struct snd_kcontrol_new cs35l32_snd_controls[] = {
114         SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL,
115                        3, 0x04, 1, classd_ctl_tlv),
116         SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0),
117         SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0),
118 };
119 
120 static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = {
121 
122         SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0),
123         SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0),
124 
125         SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1),
126 
127         SND_SOC_DAPM_INPUT("VP"),
128         SND_SOC_DAPM_INPUT("ISENSE"),
129         SND_SOC_DAPM_INPUT("VSENSE"),
130 
131         SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl),
132         SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl),
133         SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl),
134 };
135 
136 static const struct snd_soc_dapm_route cs35l32_audio_map[] = {
137 
138         {"Speaker", NULL, "BOOST"},
139 
140         {"VMON ADC", NULL, "VSENSE"},
141         {"IMON ADC", NULL, "ISENSE"},
142         {"VPMON ADC", NULL, "VP"},
143 
144         {"SDOUT", "Switch", "VMON ADC"},
145         {"SDOUT",  "Switch", "IMON ADC"},
146         {"SDOUT", "Switch", "VPMON ADC"},
147 
148         {"Capture", NULL, "SDOUT"},
149 };
150 
151 static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
152 {
153         struct snd_soc_component *component = codec_dai->component;
154 
155         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
156         case SND_SOC_DAIFMT_CBM_CFM:
157                 snd_soc_component_update_bits(component, CS35L32_ADSP_CTL,
158                                     CS35L32_ADSP_MASTER_MASK,
159                                 CS35L32_ADSP_MASTER_MASK);
160                 break;
161         case SND_SOC_DAIFMT_CBS_CFS:
162                 snd_soc_component_update_bits(component, CS35L32_ADSP_CTL,
163                                     CS35L32_ADSP_MASTER_MASK, 0);
164                 break;
165         default:
166                 return -EINVAL;
167         }
168 
169         return 0;
170 }
171 
172 static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate)
173 {
174         struct snd_soc_component *component = dai->component;
175 
176         return snd_soc_component_update_bits(component, CS35L32_PWRCTL2,
177                                         CS35L32_SDOUT_3ST, tristate << 3);
178 }
179 
180 static const struct snd_soc_dai_ops cs35l32_ops = {
181         .set_fmt = cs35l32_set_dai_fmt,
182         .set_tristate = cs35l32_set_tristate,
183 };
184 
185 static struct snd_soc_dai_driver cs35l32_dai[] = {
186         {
187                 .name = "cs35l32-monitor",
188                 .id = 0,
189                 .capture = {
190                         .stream_name = "Capture",
191                         .channels_min = 2,
192                         .channels_max = 2,
193                         .rates = CS35L32_RATES,
194                         .formats = CS35L32_FORMATS,
195                 },
196                 .ops = &cs35l32_ops,
197                 .symmetric_rates = 1,
198         }
199 };
200 
201 static int cs35l32_component_set_sysclk(struct snd_soc_component *component,
202                               int clk_id, int source, unsigned int freq, int dir)
203 {
204         unsigned int val;
205 
206         switch (freq) {
207         case 6000000:
208                 val = CS35L32_MCLK_RATIO;
209                 break;
210         case 12000000:
211                 val = CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO;
212                 break;
213         case 6144000:
214                 val = 0;
215                 break;
216         case 12288000:
217                 val = CS35L32_MCLK_DIV2_MASK;
218                 break;
219         default:
220                 return -EINVAL;
221         }
222 
223         return snd_soc_component_update_bits(component, CS35L32_CLK_CTL,
224                         CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO_MASK, val);
225 }
226 
227 static const struct snd_soc_component_driver soc_component_dev_cs35l32 = {
228         .set_sysclk             = cs35l32_component_set_sysclk,
229         .controls               = cs35l32_snd_controls,
230         .num_controls           = ARRAY_SIZE(cs35l32_snd_controls),
231         .dapm_widgets           = cs35l32_dapm_widgets,
232         .num_dapm_widgets       = ARRAY_SIZE(cs35l32_dapm_widgets),
233         .dapm_routes            = cs35l32_audio_map,
234         .num_dapm_routes        = ARRAY_SIZE(cs35l32_audio_map),
235         .idle_bias_on           = 1,
236         .use_pmdown_time        = 1,
237         .endianness             = 1,
238         .non_legacy_dai_naming  = 1,
239 };
240 
241 /* Current and threshold powerup sequence Pg37 in datasheet */
242 static const struct reg_sequence cs35l32_monitor_patch[] = {
243 
244         { 0x00, 0x99 },
245         { 0x48, 0x17 },
246         { 0x49, 0x56 },
247         { 0x43, 0x01 },
248         { 0x3B, 0x62 },
249         { 0x3C, 0x80 },
250         { 0x00, 0x00 },
251 };
252 
253 static const struct regmap_config cs35l32_regmap = {
254         .reg_bits = 8,
255         .val_bits = 8,
256 
257         .max_register = CS35L32_MAX_REGISTER,
258         .reg_defaults = cs35l32_reg_defaults,
259         .num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults),
260         .volatile_reg = cs35l32_volatile_register,
261         .readable_reg = cs35l32_readable_register,
262         .precious_reg = cs35l32_precious_register,
263         .cache_type = REGCACHE_RBTREE,
264 };
265 
266 static int cs35l32_handle_of_data(struct i2c_client *i2c_client,
267                                     struct cs35l32_platform_data *pdata)
268 {
269         struct device_node *np = i2c_client->dev.of_node;
270         unsigned int val;
271 
272         if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0)
273                 pdata->sdout_share = val;
274 
275         if (of_property_read_u32(np, "cirrus,boost-manager", &val))
276                 val = -1u;
277 
278         switch (val) {
279         case CS35L32_BOOST_MGR_AUTO:
280         case CS35L32_BOOST_MGR_AUTO_AUDIO:
281         case CS35L32_BOOST_MGR_BYPASS:
282         case CS35L32_BOOST_MGR_FIXED:
283                 pdata->boost_mng = val;
284                 break;
285         case -1u:
286         default:
287                 dev_err(&i2c_client->dev,
288                         "Wrong cirrus,boost-manager DT value %d\n", val);
289                 pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
290         }
291 
292         if (of_property_read_u32(np, "cirrus,sdout-datacfg", &val))
293                 val = -1u;
294         switch (val) {
295         case CS35L32_DATA_CFG_LR_VP:
296         case CS35L32_DATA_CFG_LR_STAT:
297         case CS35L32_DATA_CFG_LR:
298         case CS35L32_DATA_CFG_LR_VPSTAT:
299                 pdata->sdout_datacfg = val;
300                 break;
301         case -1u:
302         default:
303                 dev_err(&i2c_client->dev,
304                         "Wrong cirrus,sdout-datacfg DT value %d\n", val);
305                 pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
306         }
307 
308         if (of_property_read_u32(np, "cirrus,battery-threshold", &val))
309                 val = -1u;
310         switch (val) {
311         case CS35L32_BATT_THRESH_3_1V:
312         case CS35L32_BATT_THRESH_3_2V:
313         case CS35L32_BATT_THRESH_3_3V:
314         case CS35L32_BATT_THRESH_3_4V:
315                 pdata->batt_thresh = val;
316                 break;
317         case -1u:
318         default:
319                 dev_err(&i2c_client->dev,
320                         "Wrong cirrus,battery-threshold DT value %d\n", val);
321                 pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
322         }
323 
324         if (of_property_read_u32(np, "cirrus,battery-recovery", &val))
325                 val = -1u;
326         switch (val) {
327         case CS35L32_BATT_RECOV_3_1V:
328         case CS35L32_BATT_RECOV_3_2V:
329         case CS35L32_BATT_RECOV_3_3V:
330         case CS35L32_BATT_RECOV_3_4V:
331         case CS35L32_BATT_RECOV_3_5V:
332         case CS35L32_BATT_RECOV_3_6V:
333                 pdata->batt_recov = val;
334                 break;
335         case -1u:
336         default:
337                 dev_err(&i2c_client->dev,
338                         "Wrong cirrus,battery-recovery DT value %d\n", val);
339                 pdata->batt_recov = CS35L32_BATT_RECOV_3_4V;
340         }
341 
342         return 0;
343 }
344 
345 static int cs35l32_i2c_probe(struct i2c_client *i2c_client,
346                                        const struct i2c_device_id *id)
347 {
348         struct cs35l32_private *cs35l32;
349         struct cs35l32_platform_data *pdata =
350                 dev_get_platdata(&i2c_client->dev);
351         int ret, i;
352         unsigned int devid = 0;
353         unsigned int reg;
354 
355         cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(*cs35l32), GFP_KERNEL);
356         if (!cs35l32)
357                 return -ENOMEM;
358 
359         i2c_set_clientdata(i2c_client, cs35l32);
360 
361         cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap);
362         if (IS_ERR(cs35l32->regmap)) {
363                 ret = PTR_ERR(cs35l32->regmap);
364                 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
365                 return ret;
366         }
367 
368         if (pdata) {
369                 cs35l32->pdata = *pdata;
370         } else {
371                 pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata),
372                                      GFP_KERNEL);
373                 if (!pdata)
374                         return -ENOMEM;
375 
376                 if (i2c_client->dev.of_node) {
377                         ret = cs35l32_handle_of_data(i2c_client,
378                                                      &cs35l32->pdata);
379                         if (ret != 0)
380                                 return ret;
381                 }
382         }
383 
384         for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++)
385                 cs35l32->supplies[i].supply = cs35l32_supply_names[i];
386 
387         ret = devm_regulator_bulk_get(&i2c_client->dev,
388                                       ARRAY_SIZE(cs35l32->supplies),
389                                       cs35l32->supplies);
390         if (ret != 0) {
391                 dev_err(&i2c_client->dev,
392                         "Failed to request supplies: %d\n", ret);
393                 return ret;
394         }
395 
396         ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
397                                     cs35l32->supplies);
398         if (ret != 0) {
399                 dev_err(&i2c_client->dev,
400                         "Failed to enable supplies: %d\n", ret);
401                 return ret;
402         }
403 
404         /* Reset the Device */
405         cs35l32->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
406                 "reset", GPIOD_OUT_LOW);
407         if (IS_ERR(cs35l32->reset_gpio))
408                 return PTR_ERR(cs35l32->reset_gpio);
409 
410         gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
411 
412         /* initialize codec */
413         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_AB, &reg);
414         devid = (reg & 0xFF) << 12;
415 
416         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_CD, &reg);
417         devid |= (reg & 0xFF) << 4;
418 
419         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_E, &reg);
420         devid |= (reg & 0xF0) >> 4;
421 
422         if (devid != CS35L32_CHIP_ID) {
423                 ret = -ENODEV;
424                 dev_err(&i2c_client->dev,
425                         "CS35L32 Device ID (%X). Expected %X\n",
426                         devid, CS35L32_CHIP_ID);
427                 return ret;
428         }
429 
430         ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, &reg);
431         if (ret < 0) {
432                 dev_err(&i2c_client->dev, "Get Revision ID failed\n");
433                 return ret;
434         }
435 
436         ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch,
437                                     ARRAY_SIZE(cs35l32_monitor_patch));
438         if (ret < 0) {
439                 dev_err(&i2c_client->dev, "Failed to apply errata patch\n");
440                 return ret;
441         }
442 
443         dev_info(&i2c_client->dev,
444                  "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF);
445 
446         /* Setup VBOOST Management */
447         if (cs35l32->pdata.boost_mng)
448                 regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR,
449                                    CS35L32_BOOST_MASK,
450                                 cs35l32->pdata.boost_mng);
451 
452         /* Setup ADSP Format Config */
453         if (cs35l32->pdata.sdout_share)
454                 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
455                                     CS35L32_ADSP_SHARE_MASK,
456                                 cs35l32->pdata.sdout_share << 3);
457 
458         /* Setup ADSP Data Configuration */
459         if (cs35l32->pdata.sdout_datacfg)
460                 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
461                                    CS35L32_ADSP_DATACFG_MASK,
462                                 cs35l32->pdata.sdout_datacfg << 4);
463 
464         /* Setup Low Battery Recovery  */
465         if (cs35l32->pdata.batt_recov)
466                 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
467                                    CS35L32_BATT_REC_MASK,
468                                 cs35l32->pdata.batt_recov << 1);
469 
470         /* Setup Low Battery Threshold */
471         if (cs35l32->pdata.batt_thresh)
472                 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
473                                    CS35L32_BATT_THRESH_MASK,
474                                 cs35l32->pdata.batt_thresh << 4);
475 
476         /* Power down the AMP */
477         regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP,
478                             CS35L32_PDN_AMP);
479 
480         /* Clear MCLK Error Bit since we don't have the clock yet */
481         ret = regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, &reg);
482 
483         ret = devm_snd_soc_register_component(&i2c_client->dev,
484                         &soc_component_dev_cs35l32, cs35l32_dai,
485                         ARRAY_SIZE(cs35l32_dai));
486         if (ret < 0)
487                 goto err_disable;
488 
489         return 0;
490 
491 err_disable:
492         regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
493                                cs35l32->supplies);
494         return ret;
495 }
496 
497 static int cs35l32_i2c_remove(struct i2c_client *i2c_client)
498 {
499         struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client);
500 
501         /* Hold down reset */
502         gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
503 
504         return 0;
505 }
506 
507 #ifdef CONFIG_PM
508 static int cs35l32_runtime_suspend(struct device *dev)
509 {
510         struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
511 
512         regcache_cache_only(cs35l32->regmap, true);
513         regcache_mark_dirty(cs35l32->regmap);
514 
515         /* Hold down reset */
516         gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
517 
518         /* remove power */
519         regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
520                                cs35l32->supplies);
521 
522         return 0;
523 }
524 
525 static int cs35l32_runtime_resume(struct device *dev)
526 {
527         struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
528         int ret;
529 
530         /* Enable power */
531         ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
532                                     cs35l32->supplies);
533         if (ret != 0) {
534                 dev_err(dev, "Failed to enable supplies: %d\n",
535                         ret);
536                 return ret;
537         }
538 
539         gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
540 
541         regcache_cache_only(cs35l32->regmap, false);
542         regcache_sync(cs35l32->regmap);
543 
544         return 0;
545 }
546 #endif
547 
548 static const struct dev_pm_ops cs35l32_runtime_pm = {
549         SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume,
550                            NULL)
551 };
552 
553 static const struct of_device_id cs35l32_of_match[] = {
554         { .compatible = "cirrus,cs35l32", },
555         {},
556 };
557 MODULE_DEVICE_TABLE(of, cs35l32_of_match);
558 
559 
560 static const struct i2c_device_id cs35l32_id[] = {
561         {"cs35l32", 0},
562         {}
563 };
564 
565 MODULE_DEVICE_TABLE(i2c, cs35l32_id);
566 
567 static struct i2c_driver cs35l32_i2c_driver = {
568         .driver = {
569                    .name = "cs35l32",
570                    .pm = &cs35l32_runtime_pm,
571                    .of_match_table = cs35l32_of_match,
572                    },
573         .id_table = cs35l32_id,
574         .probe = cs35l32_i2c_probe,
575         .remove = cs35l32_i2c_remove,
576 };
577 
578 module_i2c_driver(cs35l32_i2c_driver);
579 
580 MODULE_DESCRIPTION("ASoC CS35L32 driver");
581 MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin@cirrus.com>");
582 MODULE_LICENSE("GPL");
583 

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