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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_codec *codec;
 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_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 92 
 93         switch (event) {
 94         case SND_SOC_DAPM_POST_PMU:
 95                 snd_soc_write(codec, TAS2552_RESERVED_0D, 0xc0);
 96                 snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5),
 97                                     (1 << 5));
 98                 snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 0);
 99                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS, 0);
100                 break;
101         case SND_SOC_DAPM_POST_PMD:
102                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS,
103                                     TAS2552_SWS);
104                 snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 1);
105                 snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
106                 snd_soc_write(codec, 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->codec)
153                 return;
154 
155         if (sw_shutdown)
156                 cfg1_reg = TAS2552_SWS;
157 
158         snd_soc_update_bits(tas2552->codec, TAS2552_CFG_1, TAS2552_SWS,
159                             cfg1_reg);
160 }
161 #endif
162 
163 static int tas2552_setup_pll(struct snd_soc_codec *codec,
164                              struct snd_pcm_hw_params *params)
165 {
166         struct tas2552_data *tas2552 = dev_get_drvdata(codec->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_read(codec, TAS2552_CFG_2) & TAS2552_PLL_ENABLE;
181         snd_soc_update_bits(codec, 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_update_bits(codec, 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;
196                 u8 j;
197                 u8 pll_sel = (tas2552->pll_clk_id << 3) & TAS2552_PLL_SRC_MASK;
198                 u8 p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
199 
200                 p = (p >> 7);
201 
202 recalc:
203                 j = (pll_clk * 2 * (1 << p)) / pll_clkin;
204                 d = (pll_clk * 2 * (1 << p)) % pll_clkin;
205                 d /= (pll_clkin / 10000);
206 
207                 if (d && (pll_clkin < 512000 || pll_clkin > 9200000)) {
208                         if (tas2552->pll_clk_id == TAS2552_PLL_CLKIN_BCLK) {
209                                 pll_clkin = 1800000;
210                                 pll_sel = (TAS2552_PLL_CLKIN_1_8_FIXED << 3) &
211                                                         TAS2552_PLL_SRC_MASK;
212                         } else {
213                                 pll_clkin = snd_soc_params_to_bclk(params);
214                                 pll_clkin += tas2552->tdm_delay;
215                                 pll_sel = (TAS2552_PLL_CLKIN_BCLK << 3) &
216                                                         TAS2552_PLL_SRC_MASK;
217                         }
218                         goto recalc;
219                 }
220 
221                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_PLL_SRC_MASK,
222                                     pll_sel);
223 
224                 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
225                                     TAS2552_PLL_J_MASK, j);
226                 /* Will clear the PLL_BYPASS bit */
227                 snd_soc_write(codec, TAS2552_PLL_CTRL_2,
228                               TAS2552_PLL_D_UPPER(d));
229                 snd_soc_write(codec, TAS2552_PLL_CTRL_3,
230                               TAS2552_PLL_D_LOWER(d));
231         }
232 
233         /* Restore PLL status */
234         snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE,
235                             pll_enable);
236 
237         return 0;
238 }
239 
240 static int tas2552_hw_params(struct snd_pcm_substream *substream,
241                              struct snd_pcm_hw_params *params,
242                              struct snd_soc_dai *dai)
243 {
244         struct snd_soc_codec *codec = dai->codec;
245         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
246         int cpf;
247         u8 ser_ctrl1_reg, wclk_rate;
248 
249         switch (params_width(params)) {
250         case 16:
251                 ser_ctrl1_reg = TAS2552_WORDLENGTH_16BIT;
252                 cpf = 32 + tas2552->tdm_delay;
253                 break;
254         case 20:
255                 ser_ctrl1_reg = TAS2552_WORDLENGTH_20BIT;
256                 cpf = 64 + tas2552->tdm_delay;
257                 break;
258         case 24:
259                 ser_ctrl1_reg = TAS2552_WORDLENGTH_24BIT;
260                 cpf = 64 + tas2552->tdm_delay;
261                 break;
262         case 32:
263                 ser_ctrl1_reg = TAS2552_WORDLENGTH_32BIT;
264                 cpf = 64 + tas2552->tdm_delay;
265                 break;
266         default:
267                 dev_err(codec->dev, "Not supported sample size: %d\n",
268                         params_width(params));
269                 return -EINVAL;
270         }
271 
272         if (cpf <= 32)
273                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_32;
274         else if (cpf <= 64)
275                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_64;
276         else if (cpf <= 128)
277                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_128;
278         else
279                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_256;
280 
281         snd_soc_update_bits(codec, TAS2552_SER_CTRL_1,
282                             TAS2552_WORDLENGTH_MASK | TAS2552_CLKSPERFRAME_MASK,
283                             ser_ctrl1_reg);
284 
285         switch (params_rate(params)) {
286         case 8000:
287                 wclk_rate = TAS2552_WCLK_FREQ_8KHZ;
288                 break;
289         case 11025:
290         case 12000:
291                 wclk_rate = TAS2552_WCLK_FREQ_11_12KHZ;
292                 break;
293         case 16000:
294                 wclk_rate = TAS2552_WCLK_FREQ_16KHZ;
295                 break;
296         case 22050:
297         case 24000:
298                 wclk_rate = TAS2552_WCLK_FREQ_22_24KHZ;
299                 break;
300         case 32000:
301                 wclk_rate = TAS2552_WCLK_FREQ_32KHZ;
302                 break;
303         case 44100:
304         case 48000:
305                 wclk_rate = TAS2552_WCLK_FREQ_44_48KHZ;
306                 break;
307         case 88200:
308         case 96000:
309                 wclk_rate = TAS2552_WCLK_FREQ_88_96KHZ;
310                 break;
311         case 176400:
312         case 192000:
313                 wclk_rate = TAS2552_WCLK_FREQ_176_192KHZ;
314                 break;
315         default:
316                 dev_err(codec->dev, "Not supported sample rate: %d\n",
317                         params_rate(params));
318                 return -EINVAL;
319         }
320 
321         snd_soc_update_bits(codec, TAS2552_CFG_3, TAS2552_WCLK_FREQ_MASK,
322                             wclk_rate);
323 
324         return tas2552_setup_pll(codec, params);
325 }
326 
327 #define TAS2552_DAI_FMT_MASK    (TAS2552_BCLKDIR | \
328                                  TAS2552_WCLKDIR | \
329                                  TAS2552_DATAFORMAT_MASK)
330 static int tas2552_prepare(struct snd_pcm_substream *substream,
331                            struct snd_soc_dai *dai)
332 {
333         struct snd_soc_codec *codec = dai->codec;
334         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
335         int delay = 0;
336 
337         /* TDM slot selection only valid in DSP_A/_B mode */
338         if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
339                 delay += (tas2552->tdm_delay + 1);
340         else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
341                 delay += tas2552->tdm_delay;
342 
343         /* Configure data delay */
344         snd_soc_write(codec, TAS2552_SER_CTRL_2, delay);
345 
346         return 0;
347 }
348 
349 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
350 {
351         struct snd_soc_codec *codec = dai->codec;
352         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
353         u8 serial_format;
354 
355         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
356         case SND_SOC_DAIFMT_CBS_CFS:
357                 serial_format = 0x00;
358                 break;
359         case SND_SOC_DAIFMT_CBS_CFM:
360                 serial_format = TAS2552_WCLKDIR;
361                 break;
362         case SND_SOC_DAIFMT_CBM_CFS:
363                 serial_format = TAS2552_BCLKDIR;
364                 break;
365         case SND_SOC_DAIFMT_CBM_CFM:
366                 serial_format = (TAS2552_BCLKDIR | TAS2552_WCLKDIR);
367                 break;
368         default:
369                 dev_vdbg(codec->dev, "DAI Format master is not found\n");
370                 return -EINVAL;
371         }
372 
373         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
374                        SND_SOC_DAIFMT_INV_MASK)) {
375         case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
376                 break;
377         case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF):
378         case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF):
379                 serial_format |= TAS2552_DATAFORMAT_DSP;
380                 break;
381         case (SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_NB_NF):
382                 serial_format |= TAS2552_DATAFORMAT_RIGHT_J;
383                 break;
384         case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
385                 serial_format |= TAS2552_DATAFORMAT_LEFT_J;
386                 break;
387         default:
388                 dev_vdbg(codec->dev, "DAI Format is not found\n");
389                 return -EINVAL;
390         }
391         tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
392 
393         snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
394                             serial_format);
395         return 0;
396 }
397 
398 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
399                                   unsigned int freq, int dir)
400 {
401         struct snd_soc_codec *codec = dai->codec;
402         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
403         u8 reg, mask, val;
404 
405         switch (clk_id) {
406         case TAS2552_PLL_CLKIN_MCLK:
407         case TAS2552_PLL_CLKIN_IVCLKIN:
408                 if (freq < 512000 || freq > 24576000) {
409                         /* out of range PLL_CLKIN, fall back to use BCLK */
410                         dev_warn(codec->dev, "Out of range PLL_CLKIN: %u\n",
411                                  freq);
412                         clk_id = TAS2552_PLL_CLKIN_BCLK;
413                         freq = 0;
414                 }
415                 /* fall through */
416         case TAS2552_PLL_CLKIN_BCLK:
417         case TAS2552_PLL_CLKIN_1_8_FIXED:
418                 mask = TAS2552_PLL_SRC_MASK;
419                 val = (clk_id << 3) & mask; /* bit 4:5 in the register */
420                 reg = TAS2552_CFG_1;
421                 tas2552->pll_clk_id = clk_id;
422                 tas2552->pll_clkin = freq;
423                 break;
424         case TAS2552_PDM_CLK_PLL:
425         case TAS2552_PDM_CLK_IVCLKIN:
426         case TAS2552_PDM_CLK_BCLK:
427         case TAS2552_PDM_CLK_MCLK:
428                 mask = TAS2552_PDM_CLK_SEL_MASK;
429                 val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
430                 reg = TAS2552_PDM_CFG;
431                 tas2552->pdm_clk_id = clk_id;
432                 tas2552->pdm_clk = freq;
433                 break;
434         default:
435                 dev_err(codec->dev, "Invalid clk id: %d\n", clk_id);
436                 return -EINVAL;
437         }
438 
439         snd_soc_update_bits(codec, reg, mask, val);
440 
441         return 0;
442 }
443 
444 static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
445                                     unsigned int tx_mask, unsigned int rx_mask,
446                                     int slots, int slot_width)
447 {
448         struct snd_soc_codec *codec = dai->codec;
449         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
450         unsigned int lsb;
451 
452         if (unlikely(!tx_mask)) {
453                 dev_err(codec->dev, "tx masks need to be non 0\n");
454                 return -EINVAL;
455         }
456 
457         /* TDM based on DSP mode requires slots to be adjacent */
458         lsb = __ffs(tx_mask);
459         if ((lsb + 1) != __fls(tx_mask)) {
460                 dev_err(codec->dev, "Invalid mask, slots must be adjacent\n");
461                 return -EINVAL;
462         }
463 
464         tas2552->tdm_delay = lsb * slot_width;
465 
466         /* DOUT in high-impedance on inactive bit clocks */
467         snd_soc_update_bits(codec, TAS2552_DOUT,
468                             TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);
469 
470         return 0;
471 }
472 
473 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
474 {
475         u8 cfg1_reg = 0;
476         struct snd_soc_codec *codec = dai->codec;
477 
478         if (mute)
479                 cfg1_reg |= TAS2552_MUTE;
480 
481         snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);
482 
483         return 0;
484 }
485 
486 #ifdef CONFIG_PM
487 static int tas2552_runtime_suspend(struct device *dev)
488 {
489         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
490 
491         tas2552_sw_shutdown(tas2552, 1);
492 
493         regcache_cache_only(tas2552->regmap, true);
494         regcache_mark_dirty(tas2552->regmap);
495 
496         gpiod_set_value(tas2552->enable_gpio, 0);
497 
498         return 0;
499 }
500 
501 static int tas2552_runtime_resume(struct device *dev)
502 {
503         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
504 
505         gpiod_set_value(tas2552->enable_gpio, 1);
506 
507         tas2552_sw_shutdown(tas2552, 0);
508 
509         regcache_cache_only(tas2552->regmap, false);
510         regcache_sync(tas2552->regmap);
511 
512         return 0;
513 }
514 #endif
515 
516 static const struct dev_pm_ops tas2552_pm = {
517         SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
518                            NULL)
519 };
520 
521 static const struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
522         .hw_params      = tas2552_hw_params,
523         .prepare        = tas2552_prepare,
524         .set_sysclk     = tas2552_set_dai_sysclk,
525         .set_fmt        = tas2552_set_dai_fmt,
526         .set_tdm_slot   = tas2552_set_dai_tdm_slot,
527         .digital_mute = tas2552_mute,
528 };
529 
530 /* Formats supported by TAS2552 driver. */
531 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
532                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
533 
534 /* TAS2552 dai structure. */
535 static struct snd_soc_dai_driver tas2552_dai[] = {
536         {
537                 .name = "tas2552-amplifier",
538                 .playback = {
539                         .stream_name = "Playback",
540                         .channels_min = 2,
541                         .channels_max = 2,
542                         .rates = SNDRV_PCM_RATE_8000_192000,
543                         .formats = TAS2552_FORMATS,
544                 },
545                 .ops = &tas2552_speaker_dai_ops,
546         },
547 };
548 
549 /*
550  * DAC digital volumes. From -7 to 24 dB in 1 dB steps
551  */
552 static DECLARE_TLV_DB_SCALE(dac_tlv, -700, 100, 0);
553 
554 static const char * const tas2552_din_source_select[] = {
555         "Muted",
556         "Left",
557         "Right",
558         "Left + Right average",
559 };
560 static SOC_ENUM_SINGLE_DECL(tas2552_din_source_enum,
561                             TAS2552_CFG_3, 3,
562                             tas2552_din_source_select);
563 
564 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
565         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
566                          TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
567         SOC_ENUM("DIN source", tas2552_din_source_enum),
568 };
569 
570 static int tas2552_codec_probe(struct snd_soc_codec *codec)
571 {
572         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
573         int ret;
574 
575         tas2552->codec = codec;
576 
577         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
578                                     tas2552->supplies);
579 
580         if (ret != 0) {
581                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
582                         ret);
583                 return ret;
584         }
585 
586         gpiod_set_value(tas2552->enable_gpio, 1);
587 
588         ret = pm_runtime_get_sync(codec->dev);
589         if (ret < 0) {
590                 dev_err(codec->dev, "Enabling device failed: %d\n",
591                         ret);
592                 goto probe_fail;
593         }
594 
595         snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
596         snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
597                                             TAS2552_DIN_SRC_SEL_AVG_L_R);
598         snd_soc_write(codec, TAS2552_OUTPUT_DATA,
599                       TAS2552_PDM_DATA_SEL_V_I |
600                       TAS2552_R_DATA_OUT(TAS2552_DATA_OUT_V_DATA));
601         snd_soc_write(codec, TAS2552_BOOST_APT_CTRL, TAS2552_APT_DELAY_200 |
602                                                      TAS2552_APT_THRESH_20_17);
603 
604         snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN | TAS2552_APT_EN |
605                                             TAS2552_LIM_EN);
606 
607         return 0;
608 
609 probe_fail:
610         gpiod_set_value(tas2552->enable_gpio, 0);
611 
612         regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
613                                         tas2552->supplies);
614         return -EIO;
615 }
616 
617 static int tas2552_codec_remove(struct snd_soc_codec *codec)
618 {
619         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
620 
621         pm_runtime_put(codec->dev);
622 
623         gpiod_set_value(tas2552->enable_gpio, 0);
624 
625         return 0;
626 };
627 
628 #ifdef CONFIG_PM
629 static int tas2552_suspend(struct snd_soc_codec *codec)
630 {
631         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
632         int ret;
633 
634         ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
635                                         tas2552->supplies);
636 
637         if (ret != 0)
638                 dev_err(codec->dev, "Failed to disable supplies: %d\n",
639                         ret);
640         return 0;
641 }
642 
643 static int tas2552_resume(struct snd_soc_codec *codec)
644 {
645         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
646         int ret;
647 
648         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
649                                     tas2552->supplies);
650 
651         if (ret != 0) {
652                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
653                         ret);
654         }
655 
656         return 0;
657 }
658 #else
659 #define tas2552_suspend NULL
660 #define tas2552_resume NULL
661 #endif
662 
663 static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
664         .probe = tas2552_codec_probe,
665         .remove = tas2552_codec_remove,
666         .suspend =      tas2552_suspend,
667         .resume = tas2552_resume,
668         .ignore_pmdown_time = true,
669 
670         .controls = tas2552_snd_controls,
671         .num_controls = ARRAY_SIZE(tas2552_snd_controls),
672         .dapm_widgets = tas2552_dapm_widgets,
673         .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
674         .dapm_routes = tas2552_audio_map,
675         .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
676 };
677 
678 static const struct regmap_config tas2552_regmap_config = {
679         .reg_bits = 8,
680         .val_bits = 8,
681 
682         .max_register = TAS2552_MAX_REG,
683         .reg_defaults = tas2552_reg_defs,
684         .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
685         .cache_type = REGCACHE_RBTREE,
686 };
687 
688 static int tas2552_probe(struct i2c_client *client,
689                            const struct i2c_device_id *id)
690 {
691         struct device *dev;
692         struct tas2552_data *data;
693         int ret;
694         int i;
695 
696         dev = &client->dev;
697         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
698         if (data == NULL)
699                 return -ENOMEM;
700 
701         data->enable_gpio = devm_gpiod_get_optional(dev, "enable",
702                                                     GPIOD_OUT_LOW);
703         if (IS_ERR(data->enable_gpio))
704                 return PTR_ERR(data->enable_gpio);
705 
706         data->tas2552_client = client;
707         data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
708         if (IS_ERR(data->regmap)) {
709                 ret = PTR_ERR(data->regmap);
710                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
711                         ret);
712                 return ret;
713         }
714 
715         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
716                 data->supplies[i].supply = tas2552_supply_names[i];
717 
718         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
719                                       data->supplies);
720         if (ret != 0) {
721                 dev_err(dev, "Failed to request supplies: %d\n", ret);
722                 return ret;
723         }
724 
725         pm_runtime_set_active(&client->dev);
726         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
727         pm_runtime_use_autosuspend(&client->dev);
728         pm_runtime_enable(&client->dev);
729         pm_runtime_mark_last_busy(&client->dev);
730         pm_runtime_put_sync_autosuspend(&client->dev);
731 
732         dev_set_drvdata(&client->dev, data);
733 
734         ret = snd_soc_register_codec(&client->dev,
735                                       &soc_codec_dev_tas2552,
736                                       tas2552_dai, ARRAY_SIZE(tas2552_dai));
737         if (ret < 0)
738                 dev_err(&client->dev, "Failed to register codec: %d\n", ret);
739 
740         return ret;
741 }
742 
743 static int tas2552_i2c_remove(struct i2c_client *client)
744 {
745         snd_soc_unregister_codec(&client->dev);
746         pm_runtime_disable(&client->dev);
747         return 0;
748 }
749 
750 static const struct i2c_device_id tas2552_id[] = {
751         { "tas2552", 0 },
752         { }
753 };
754 MODULE_DEVICE_TABLE(i2c, tas2552_id);
755 
756 #if IS_ENABLED(CONFIG_OF)
757 static const struct of_device_id tas2552_of_match[] = {
758         { .compatible = "ti,tas2552", },
759         {},
760 };
761 MODULE_DEVICE_TABLE(of, tas2552_of_match);
762 #endif
763 
764 static struct i2c_driver tas2552_i2c_driver = {
765         .driver = {
766                 .name = "tas2552",
767                 .of_match_table = of_match_ptr(tas2552_of_match),
768                 .pm = &tas2552_pm,
769         },
770         .probe = tas2552_probe,
771         .remove = tas2552_i2c_remove,
772         .id_table = tas2552_id,
773 };
774 
775 module_i2c_driver(tas2552_i2c_driver);
776 
777 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
778 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
779 MODULE_LICENSE("GPL");
780 

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