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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/tas2552.c

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  1 /*
  2  * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
  3  *
  4  * Copyright (C) 2014 Texas Instruments Incorporated -  http://www.ti.com
  5  *
  6  * Author: Dan Murphy <dmurphy@ti.com>
  7  *
  8  * This program is free software; you can redistribute it and/or
  9  * modify it under the terms of the GNU General Public License
 10  * version 2 as published by the Free Software Foundation.
 11  *
 12  * This program is distributed in the hope that it will be useful, but
 13  * WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15  * General Public License for more details.
 16  */
 17 
 18 #include <linux/module.h>
 19 #include <linux/errno.h>
 20 #include <linux/device.h>
 21 #include <linux/i2c.h>
 22 #include <linux/gpio.h>
 23 #include <linux/of_gpio.h>
 24 #include <linux/pm_runtime.h>
 25 #include <linux/regmap.h>
 26 #include <linux/slab.h>
 27 
 28 #include <linux/gpio/consumer.h>
 29 #include <linux/regulator/consumer.h>
 30 
 31 #include <sound/pcm.h>
 32 #include <sound/pcm_params.h>
 33 #include <sound/soc.h>
 34 #include <sound/soc-dapm.h>
 35 #include <sound/tlv.h>
 36 #include <sound/tas2552-plat.h>
 37 #include <dt-bindings/sound/tas2552.h>
 38 
 39 #include "tas2552.h"
 40 
 41 static const struct reg_default tas2552_reg_defs[] = {
 42         {TAS2552_CFG_1, 0x22},
 43         {TAS2552_CFG_3, 0x80},
 44         {TAS2552_DOUT, 0x00},
 45         {TAS2552_OUTPUT_DATA, 0xc0},
 46         {TAS2552_PDM_CFG, 0x01},
 47         {TAS2552_PGA_GAIN, 0x00},
 48         {TAS2552_BOOST_APT_CTRL, 0x0f},
 49         {TAS2552_RESERVED_0D, 0xbe},
 50         {TAS2552_LIMIT_RATE_HYS, 0x08},
 51         {TAS2552_CFG_2, 0xef},
 52         {TAS2552_SER_CTRL_1, 0x00},
 53         {TAS2552_SER_CTRL_2, 0x00},
 54         {TAS2552_PLL_CTRL_1, 0x10},
 55         {TAS2552_PLL_CTRL_2, 0x00},
 56         {TAS2552_PLL_CTRL_3, 0x00},
 57         {TAS2552_BTIP, 0x8f},
 58         {TAS2552_BTS_CTRL, 0x80},
 59         {TAS2552_LIMIT_RELEASE, 0x04},
 60         {TAS2552_LIMIT_INT_COUNT, 0x00},
 61         {TAS2552_EDGE_RATE_CTRL, 0x40},
 62         {TAS2552_VBAT_DATA, 0x00},
 63 };
 64 
 65 #define TAS2552_NUM_SUPPLIES    3
 66 static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
 67         "vbat",         /* vbat voltage */
 68         "iovdd",        /* I/O Voltage */
 69         "avdd",         /* Analog DAC Voltage */
 70 };
 71 
 72 struct tas2552_data {
 73         struct snd_soc_component *component;
 74         struct regmap *regmap;
 75         struct i2c_client *tas2552_client;
 76         struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
 77         struct gpio_desc *enable_gpio;
 78         unsigned char regs[TAS2552_VBAT_DATA];
 79         unsigned int pll_clkin;
 80         int pll_clk_id;
 81         unsigned int pdm_clk;
 82         int pdm_clk_id;
 83 
 84         unsigned int dai_fmt;
 85         unsigned int tdm_delay;
 86 };
 87 
 88 static int tas2552_post_event(struct snd_soc_dapm_widget *w,
 89                               struct snd_kcontrol *kcontrol, int event)
 90 {
 91         struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 92 
 93         switch (event) {
 94         case SND_SOC_DAPM_POST_PMU:
 95                 snd_soc_component_write(component, TAS2552_RESERVED_0D, 0xc0);
 96                 snd_soc_component_update_bits(component, TAS2552_LIMIT_RATE_HYS, (1 << 5),
 97                                     (1 << 5));
 98                 snd_soc_component_update_bits(component, TAS2552_CFG_2, 1, 0);
 99                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_SWS, 0);
100                 break;
101         case SND_SOC_DAPM_POST_PMD:
102                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_SWS,
103                                     TAS2552_SWS);
104                 snd_soc_component_update_bits(component, TAS2552_CFG_2, 1, 1);
105                 snd_soc_component_update_bits(component, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
106                 snd_soc_component_write(component, TAS2552_RESERVED_0D, 0xbe);
107                 break;
108         }
109         return 0;
110 }
111 
112 /* Input mux controls */
113 static const char * const tas2552_input_texts[] = {
114         "Digital", "Analog" };
115 static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
116                             tas2552_input_texts);
117 
118 static const struct snd_kcontrol_new tas2552_input_mux_control =
119         SOC_DAPM_ENUM("Route", tas2552_input_mux_enum);
120 
121 static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
122 {
123         SND_SOC_DAPM_INPUT("IN"),
124 
125         /* MUX Controls */
126         SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
127                          &tas2552_input_mux_control),
128 
129         SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
130         SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
131         SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
132         SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
133         SND_SOC_DAPM_POST("Post Event", tas2552_post_event),
134 
135         SND_SOC_DAPM_OUTPUT("OUT")
136 };
137 
138 static const struct snd_soc_dapm_route tas2552_audio_map[] = {
139         {"DAC", NULL, "DAC IN"},
140         {"Input selection", "Digital", "DAC"},
141         {"Input selection", "Analog", "IN"},
142         {"ClassD", NULL, "Input selection"},
143         {"OUT", NULL, "ClassD"},
144         {"ClassD", NULL, "PLL"},
145 };
146 
147 #ifdef CONFIG_PM
148 static void tas2552_sw_shutdown(struct tas2552_data *tas2552, int sw_shutdown)
149 {
150         u8 cfg1_reg = 0;
151 
152         if (!tas2552->component)
153                 return;
154 
155         if (sw_shutdown)
156                 cfg1_reg = TAS2552_SWS;
157 
158         snd_soc_component_update_bits(tas2552->component, TAS2552_CFG_1, TAS2552_SWS,
159                             cfg1_reg);
160 }
161 #endif
162 
163 static int tas2552_setup_pll(struct snd_soc_component *component,
164                              struct snd_pcm_hw_params *params)
165 {
166         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
167         bool bypass_pll = false;
168         unsigned int pll_clk = params_rate(params) * 512;
169         unsigned int pll_clkin = tas2552->pll_clkin;
170         u8 pll_enable;
171 
172         if (!pll_clkin) {
173                 if (tas2552->pll_clk_id != TAS2552_PLL_CLKIN_BCLK)
174                         return -EINVAL;
175 
176                 pll_clkin = snd_soc_params_to_bclk(params);
177                 pll_clkin += tas2552->tdm_delay;
178         }
179 
180         pll_enable = snd_soc_component_read32(component, TAS2552_CFG_2) & TAS2552_PLL_ENABLE;
181         snd_soc_component_update_bits(component, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
182 
183         if (pll_clkin == pll_clk)
184                 bypass_pll = true;
185 
186         if (bypass_pll) {
187                 /* By pass the PLL configuration */
188                 snd_soc_component_update_bits(component, TAS2552_PLL_CTRL_2,
189                                     TAS2552_PLL_BYPASS, TAS2552_PLL_BYPASS);
190         } else {
191                 /* Fill in the PLL control registers for J & D
192                  * pll_clk = (.5 * pll_clkin * J.D) / 2^p
193                  * Need to fill in J and D here based on incoming freq
194                  */
195                 unsigned int d, q, t;
196                 u8 j;
197                 u8 pll_sel = (tas2552->pll_clk_id << 3) & TAS2552_PLL_SRC_MASK;
198                 u8 p = snd_soc_component_read32(component, TAS2552_PLL_CTRL_1);
199 
200                 p = (p >> 7);
201 
202 recalc:
203                 t = (pll_clk * 2) << p;
204                 j = t / pll_clkin;
205                 d = t % pll_clkin;
206                 t = pll_clkin / 10000;
207                 q = d / (t + 1);
208                 d = q + ((9999 - pll_clkin % 10000) * (d / t - q)) / 10000;
209 
210                 if (d && (pll_clkin < 512000 || pll_clkin > 9200000)) {
211                         if (tas2552->pll_clk_id == TAS2552_PLL_CLKIN_BCLK) {
212                                 pll_clkin = 1800000;
213                                 pll_sel = (TAS2552_PLL_CLKIN_1_8_FIXED << 3) &
214                                                         TAS2552_PLL_SRC_MASK;
215                         } else {
216                                 pll_clkin = snd_soc_params_to_bclk(params);
217                                 pll_clkin += tas2552->tdm_delay;
218                                 pll_sel = (TAS2552_PLL_CLKIN_BCLK << 3) &
219                                                         TAS2552_PLL_SRC_MASK;
220                         }
221                         goto recalc;
222                 }
223 
224                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_PLL_SRC_MASK,
225                                     pll_sel);
226 
227                 snd_soc_component_update_bits(component, TAS2552_PLL_CTRL_1,
228                                     TAS2552_PLL_J_MASK, j);
229                 /* Will clear the PLL_BYPASS bit */
230                 snd_soc_component_write(component, TAS2552_PLL_CTRL_2,
231                               TAS2552_PLL_D_UPPER(d));
232                 snd_soc_component_write(component, TAS2552_PLL_CTRL_3,
233                               TAS2552_PLL_D_LOWER(d));
234         }
235 
236         /* Restore PLL status */
237         snd_soc_component_update_bits(component, TAS2552_CFG_2, TAS2552_PLL_ENABLE,
238                             pll_enable);
239 
240         return 0;
241 }
242 
243 static int tas2552_hw_params(struct snd_pcm_substream *substream,
244                              struct snd_pcm_hw_params *params,
245                              struct snd_soc_dai *dai)
246 {
247         struct snd_soc_component *component = dai->component;
248         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
249         int cpf;
250         u8 ser_ctrl1_reg, wclk_rate;
251 
252         switch (params_width(params)) {
253         case 16:
254                 ser_ctrl1_reg = TAS2552_WORDLENGTH_16BIT;
255                 cpf = 32 + tas2552->tdm_delay;
256                 break;
257         case 20:
258                 ser_ctrl1_reg = TAS2552_WORDLENGTH_20BIT;
259                 cpf = 64 + tas2552->tdm_delay;
260                 break;
261         case 24:
262                 ser_ctrl1_reg = TAS2552_WORDLENGTH_24BIT;
263                 cpf = 64 + tas2552->tdm_delay;
264                 break;
265         case 32:
266                 ser_ctrl1_reg = TAS2552_WORDLENGTH_32BIT;
267                 cpf = 64 + tas2552->tdm_delay;
268                 break;
269         default:
270                 dev_err(component->dev, "Not supported sample size: %d\n",
271                         params_width(params));
272                 return -EINVAL;
273         }
274 
275         if (cpf <= 32)
276                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_32;
277         else if (cpf <= 64)
278                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_64;
279         else if (cpf <= 128)
280                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_128;
281         else
282                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_256;
283 
284         snd_soc_component_update_bits(component, TAS2552_SER_CTRL_1,
285                             TAS2552_WORDLENGTH_MASK | TAS2552_CLKSPERFRAME_MASK,
286                             ser_ctrl1_reg);
287 
288         switch (params_rate(params)) {
289         case 8000:
290                 wclk_rate = TAS2552_WCLK_FREQ_8KHZ;
291                 break;
292         case 11025:
293         case 12000:
294                 wclk_rate = TAS2552_WCLK_FREQ_11_12KHZ;
295                 break;
296         case 16000:
297                 wclk_rate = TAS2552_WCLK_FREQ_16KHZ;
298                 break;
299         case 22050:
300         case 24000:
301                 wclk_rate = TAS2552_WCLK_FREQ_22_24KHZ;
302                 break;
303         case 32000:
304                 wclk_rate = TAS2552_WCLK_FREQ_32KHZ;
305                 break;
306         case 44100:
307         case 48000:
308                 wclk_rate = TAS2552_WCLK_FREQ_44_48KHZ;
309                 break;
310         case 88200:
311         case 96000:
312                 wclk_rate = TAS2552_WCLK_FREQ_88_96KHZ;
313                 break;
314         case 176400:
315         case 192000:
316                 wclk_rate = TAS2552_WCLK_FREQ_176_192KHZ;
317                 break;
318         default:
319                 dev_err(component->dev, "Not supported sample rate: %d\n",
320                         params_rate(params));
321                 return -EINVAL;
322         }
323 
324         snd_soc_component_update_bits(component, TAS2552_CFG_3, TAS2552_WCLK_FREQ_MASK,
325                             wclk_rate);
326 
327         return tas2552_setup_pll(component, params);
328 }
329 
330 #define TAS2552_DAI_FMT_MASK    (TAS2552_BCLKDIR | \
331                                  TAS2552_WCLKDIR | \
332                                  TAS2552_DATAFORMAT_MASK)
333 static int tas2552_prepare(struct snd_pcm_substream *substream,
334                            struct snd_soc_dai *dai)
335 {
336         struct snd_soc_component *component = dai->component;
337         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
338         int delay = 0;
339 
340         /* TDM slot selection only valid in DSP_A/_B mode */
341         if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
342                 delay += (tas2552->tdm_delay + 1);
343         else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
344                 delay += tas2552->tdm_delay;
345 
346         /* Configure data delay */
347         snd_soc_component_write(component, TAS2552_SER_CTRL_2, delay);
348 
349         return 0;
350 }
351 
352 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
353 {
354         struct snd_soc_component *component = dai->component;
355         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
356         u8 serial_format;
357 
358         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
359         case SND_SOC_DAIFMT_CBS_CFS:
360                 serial_format = 0x00;
361                 break;
362         case SND_SOC_DAIFMT_CBS_CFM:
363                 serial_format = TAS2552_WCLKDIR;
364                 break;
365         case SND_SOC_DAIFMT_CBM_CFS:
366                 serial_format = TAS2552_BCLKDIR;
367                 break;
368         case SND_SOC_DAIFMT_CBM_CFM:
369                 serial_format = (TAS2552_BCLKDIR | TAS2552_WCLKDIR);
370                 break;
371         default:
372                 dev_vdbg(component->dev, "DAI Format master is not found\n");
373                 return -EINVAL;
374         }
375 
376         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
377                        SND_SOC_DAIFMT_INV_MASK)) {
378         case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
379                 break;
380         case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF):
381         case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF):
382                 serial_format |= TAS2552_DATAFORMAT_DSP;
383                 break;
384         case (SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_NB_NF):
385                 serial_format |= TAS2552_DATAFORMAT_RIGHT_J;
386                 break;
387         case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
388                 serial_format |= TAS2552_DATAFORMAT_LEFT_J;
389                 break;
390         default:
391                 dev_vdbg(component->dev, "DAI Format is not found\n");
392                 return -EINVAL;
393         }
394         tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
395 
396         snd_soc_component_update_bits(component, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
397                             serial_format);
398         return 0;
399 }
400 
401 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
402                                   unsigned int freq, int dir)
403 {
404         struct snd_soc_component *component = dai->component;
405         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
406         u8 reg, mask, val;
407 
408         switch (clk_id) {
409         case TAS2552_PLL_CLKIN_MCLK:
410         case TAS2552_PLL_CLKIN_IVCLKIN:
411                 if (freq < 512000 || freq > 24576000) {
412                         /* out of range PLL_CLKIN, fall back to use BCLK */
413                         dev_warn(component->dev, "Out of range PLL_CLKIN: %u\n",
414                                  freq);
415                         clk_id = TAS2552_PLL_CLKIN_BCLK;
416                         freq = 0;
417                 }
418                 /* fall through */
419         case TAS2552_PLL_CLKIN_BCLK:
420         case TAS2552_PLL_CLKIN_1_8_FIXED:
421                 mask = TAS2552_PLL_SRC_MASK;
422                 val = (clk_id << 3) & mask; /* bit 4:5 in the register */
423                 reg = TAS2552_CFG_1;
424                 tas2552->pll_clk_id = clk_id;
425                 tas2552->pll_clkin = freq;
426                 break;
427         case TAS2552_PDM_CLK_PLL:
428         case TAS2552_PDM_CLK_IVCLKIN:
429         case TAS2552_PDM_CLK_BCLK:
430         case TAS2552_PDM_CLK_MCLK:
431                 mask = TAS2552_PDM_CLK_SEL_MASK;
432                 val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
433                 reg = TAS2552_PDM_CFG;
434                 tas2552->pdm_clk_id = clk_id;
435                 tas2552->pdm_clk = freq;
436                 break;
437         default:
438                 dev_err(component->dev, "Invalid clk id: %d\n", clk_id);
439                 return -EINVAL;
440         }
441 
442         snd_soc_component_update_bits(component, reg, mask, val);
443 
444         return 0;
445 }
446 
447 static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
448                                     unsigned int tx_mask, unsigned int rx_mask,
449                                     int slots, int slot_width)
450 {
451         struct snd_soc_component *component = dai->component;
452         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
453         unsigned int lsb;
454 
455         if (unlikely(!tx_mask)) {
456                 dev_err(component->dev, "tx masks need to be non 0\n");
457                 return -EINVAL;
458         }
459 
460         /* TDM based on DSP mode requires slots to be adjacent */
461         lsb = __ffs(tx_mask);
462         if ((lsb + 1) != __fls(tx_mask)) {
463                 dev_err(component->dev, "Invalid mask, slots must be adjacent\n");
464                 return -EINVAL;
465         }
466 
467         tas2552->tdm_delay = lsb * slot_width;
468 
469         /* DOUT in high-impedance on inactive bit clocks */
470         snd_soc_component_update_bits(component, TAS2552_DOUT,
471                             TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);
472 
473         return 0;
474 }
475 
476 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
477 {
478         u8 cfg1_reg = 0;
479         struct snd_soc_component *component = dai->component;
480 
481         if (mute)
482                 cfg1_reg |= TAS2552_MUTE;
483 
484         snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);
485 
486         return 0;
487 }
488 
489 #ifdef CONFIG_PM
490 static int tas2552_runtime_suspend(struct device *dev)
491 {
492         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
493 
494         tas2552_sw_shutdown(tas2552, 1);
495 
496         regcache_cache_only(tas2552->regmap, true);
497         regcache_mark_dirty(tas2552->regmap);
498 
499         gpiod_set_value(tas2552->enable_gpio, 0);
500 
501         return 0;
502 }
503 
504 static int tas2552_runtime_resume(struct device *dev)
505 {
506         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
507 
508         gpiod_set_value(tas2552->enable_gpio, 1);
509 
510         tas2552_sw_shutdown(tas2552, 0);
511 
512         regcache_cache_only(tas2552->regmap, false);
513         regcache_sync(tas2552->regmap);
514 
515         return 0;
516 }
517 #endif
518 
519 static const struct dev_pm_ops tas2552_pm = {
520         SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
521                            NULL)
522 };
523 
524 static const struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
525         .hw_params      = tas2552_hw_params,
526         .prepare        = tas2552_prepare,
527         .set_sysclk     = tas2552_set_dai_sysclk,
528         .set_fmt        = tas2552_set_dai_fmt,
529         .set_tdm_slot   = tas2552_set_dai_tdm_slot,
530         .digital_mute = tas2552_mute,
531 };
532 
533 /* Formats supported by TAS2552 driver. */
534 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
535                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
536 
537 /* TAS2552 dai structure. */
538 static struct snd_soc_dai_driver tas2552_dai[] = {
539         {
540                 .name = "tas2552-amplifier",
541                 .playback = {
542                         .stream_name = "Playback",
543                         .channels_min = 2,
544                         .channels_max = 2,
545                         .rates = SNDRV_PCM_RATE_8000_192000,
546                         .formats = TAS2552_FORMATS,
547                 },
548                 .ops = &tas2552_speaker_dai_ops,
549         },
550 };
551 
552 /*
553  * DAC digital volumes. From -7 to 24 dB in 1 dB steps
554  */
555 static DECLARE_TLV_DB_SCALE(dac_tlv, -700, 100, 0);
556 
557 static const char * const tas2552_din_source_select[] = {
558         "Muted",
559         "Left",
560         "Right",
561         "Left + Right average",
562 };
563 static SOC_ENUM_SINGLE_DECL(tas2552_din_source_enum,
564                             TAS2552_CFG_3, 3,
565                             tas2552_din_source_select);
566 
567 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
568         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
569                          TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
570         SOC_ENUM("DIN source", tas2552_din_source_enum),
571 };
572 
573 static int tas2552_component_probe(struct snd_soc_component *component)
574 {
575         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
576         int ret;
577 
578         tas2552->component = component;
579 
580         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
581                                     tas2552->supplies);
582 
583         if (ret != 0) {
584                 dev_err(component->dev, "Failed to enable supplies: %d\n",
585                         ret);
586                 return ret;
587         }
588 
589         gpiod_set_value(tas2552->enable_gpio, 1);
590 
591         ret = pm_runtime_get_sync(component->dev);
592         if (ret < 0) {
593                 dev_err(component->dev, "Enabling device failed: %d\n",
594                         ret);
595                 goto probe_fail;
596         }
597 
598         snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
599         snd_soc_component_write(component, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
600                                             TAS2552_DIN_SRC_SEL_AVG_L_R);
601         snd_soc_component_write(component, TAS2552_OUTPUT_DATA,
602                       TAS2552_PDM_DATA_SEL_V_I |
603                       TAS2552_R_DATA_OUT(TAS2552_DATA_OUT_V_DATA));
604         snd_soc_component_write(component, TAS2552_BOOST_APT_CTRL, TAS2552_APT_DELAY_200 |
605                                                      TAS2552_APT_THRESH_20_17);
606 
607         snd_soc_component_write(component, TAS2552_CFG_2, TAS2552_BOOST_EN | TAS2552_APT_EN |
608                                             TAS2552_LIM_EN);
609 
610         return 0;
611 
612 probe_fail:
613         gpiod_set_value(tas2552->enable_gpio, 0);
614 
615         regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
616                                         tas2552->supplies);
617         return ret;
618 }
619 
620 static void tas2552_component_remove(struct snd_soc_component *component)
621 {
622         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
623 
624         pm_runtime_put(component->dev);
625 
626         gpiod_set_value(tas2552->enable_gpio, 0);
627 };
628 
629 #ifdef CONFIG_PM
630 static int tas2552_suspend(struct snd_soc_component *component)
631 {
632         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
633         int ret;
634 
635         ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
636                                         tas2552->supplies);
637 
638         if (ret != 0)
639                 dev_err(component->dev, "Failed to disable supplies: %d\n",
640                         ret);
641         return ret;
642 }
643 
644 static int tas2552_resume(struct snd_soc_component *component)
645 {
646         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
647         int ret;
648 
649         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
650                                     tas2552->supplies);
651 
652         if (ret != 0) {
653                 dev_err(component->dev, "Failed to enable supplies: %d\n",
654                         ret);
655         }
656 
657         return ret;
658 }
659 #else
660 #define tas2552_suspend NULL
661 #define tas2552_resume NULL
662 #endif
663 
664 static const struct snd_soc_component_driver soc_component_dev_tas2552 = {
665         .probe                  = tas2552_component_probe,
666         .remove                 = tas2552_component_remove,
667         .suspend                = tas2552_suspend,
668         .resume                 = tas2552_resume,
669         .controls               = tas2552_snd_controls,
670         .num_controls           = ARRAY_SIZE(tas2552_snd_controls),
671         .dapm_widgets           = tas2552_dapm_widgets,
672         .num_dapm_widgets       = ARRAY_SIZE(tas2552_dapm_widgets),
673         .dapm_routes            = tas2552_audio_map,
674         .num_dapm_routes        = ARRAY_SIZE(tas2552_audio_map),
675         .idle_bias_on           = 1,
676         .endianness             = 1,
677         .non_legacy_dai_naming  = 1,
678 };
679 
680 static const struct regmap_config tas2552_regmap_config = {
681         .reg_bits = 8,
682         .val_bits = 8,
683 
684         .max_register = TAS2552_MAX_REG,
685         .reg_defaults = tas2552_reg_defs,
686         .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
687         .cache_type = REGCACHE_RBTREE,
688 };
689 
690 static int tas2552_probe(struct i2c_client *client,
691                            const struct i2c_device_id *id)
692 {
693         struct device *dev;
694         struct tas2552_data *data;
695         int ret;
696         int i;
697 
698         dev = &client->dev;
699         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
700         if (data == NULL)
701                 return -ENOMEM;
702 
703         data->enable_gpio = devm_gpiod_get_optional(dev, "enable",
704                                                     GPIOD_OUT_LOW);
705         if (IS_ERR(data->enable_gpio))
706                 return PTR_ERR(data->enable_gpio);
707 
708         data->tas2552_client = client;
709         data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
710         if (IS_ERR(data->regmap)) {
711                 ret = PTR_ERR(data->regmap);
712                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
713                         ret);
714                 return ret;
715         }
716 
717         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
718                 data->supplies[i].supply = tas2552_supply_names[i];
719 
720         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
721                                       data->supplies);
722         if (ret != 0) {
723                 dev_err(dev, "Failed to request supplies: %d\n", ret);
724                 return ret;
725         }
726 
727         pm_runtime_set_active(&client->dev);
728         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
729         pm_runtime_use_autosuspend(&client->dev);
730         pm_runtime_enable(&client->dev);
731         pm_runtime_mark_last_busy(&client->dev);
732         pm_runtime_put_sync_autosuspend(&client->dev);
733 
734         dev_set_drvdata(&client->dev, data);
735 
736         ret = devm_snd_soc_register_component(&client->dev,
737                                       &soc_component_dev_tas2552,
738                                       tas2552_dai, ARRAY_SIZE(tas2552_dai));
739         if (ret < 0)
740                 dev_err(&client->dev, "Failed to register component: %d\n", ret);
741 
742         return ret;
743 }
744 
745 static int tas2552_i2c_remove(struct i2c_client *client)
746 {
747         pm_runtime_disable(&client->dev);
748         return 0;
749 }
750 
751 static const struct i2c_device_id tas2552_id[] = {
752         { "tas2552", 0 },
753         { }
754 };
755 MODULE_DEVICE_TABLE(i2c, tas2552_id);
756 
757 #if IS_ENABLED(CONFIG_OF)
758 static const struct of_device_id tas2552_of_match[] = {
759         { .compatible = "ti,tas2552", },
760         {},
761 };
762 MODULE_DEVICE_TABLE(of, tas2552_of_match);
763 #endif
764 
765 static struct i2c_driver tas2552_i2c_driver = {
766         .driver = {
767                 .name = "tas2552",
768                 .of_match_table = of_match_ptr(tas2552_of_match),
769                 .pm = &tas2552_pm,
770         },
771         .probe = tas2552_probe,
772         .remove = tas2552_i2c_remove,
773         .id_table = tas2552_id,
774 };
775 
776 module_i2c_driver(tas2552_i2c_driver);
777 
778 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
779 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
780 MODULE_LICENSE("GPL");
781 

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