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Linux/sound/soc/codecs/tas2552.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
  4  *
  5  * Copyright (C) 2014 Texas Instruments Incorporated -  http://www.ti.com
  6  *
  7  * Author: Dan Murphy <dmurphy@ti.com>
  8  */
  9 
 10 #include <linux/module.h>
 11 #include <linux/errno.h>
 12 #include <linux/device.h>
 13 #include <linux/i2c.h>
 14 #include <linux/gpio.h>
 15 #include <linux/of_gpio.h>
 16 #include <linux/pm_runtime.h>
 17 #include <linux/regmap.h>
 18 #include <linux/slab.h>
 19 
 20 #include <linux/gpio/consumer.h>
 21 #include <linux/regulator/consumer.h>
 22 
 23 #include <sound/pcm.h>
 24 #include <sound/pcm_params.h>
 25 #include <sound/soc.h>
 26 #include <sound/soc-dapm.h>
 27 #include <sound/tlv.h>
 28 #include <sound/tas2552-plat.h>
 29 #include <dt-bindings/sound/tas2552.h>
 30 
 31 #include "tas2552.h"
 32 
 33 static const struct reg_default tas2552_reg_defs[] = {
 34         {TAS2552_CFG_1, 0x22},
 35         {TAS2552_CFG_3, 0x80},
 36         {TAS2552_DOUT, 0x00},
 37         {TAS2552_OUTPUT_DATA, 0xc0},
 38         {TAS2552_PDM_CFG, 0x01},
 39         {TAS2552_PGA_GAIN, 0x00},
 40         {TAS2552_BOOST_APT_CTRL, 0x0f},
 41         {TAS2552_RESERVED_0D, 0xbe},
 42         {TAS2552_LIMIT_RATE_HYS, 0x08},
 43         {TAS2552_CFG_2, 0xef},
 44         {TAS2552_SER_CTRL_1, 0x00},
 45         {TAS2552_SER_CTRL_2, 0x00},
 46         {TAS2552_PLL_CTRL_1, 0x10},
 47         {TAS2552_PLL_CTRL_2, 0x00},
 48         {TAS2552_PLL_CTRL_3, 0x00},
 49         {TAS2552_BTIP, 0x8f},
 50         {TAS2552_BTS_CTRL, 0x80},
 51         {TAS2552_LIMIT_RELEASE, 0x04},
 52         {TAS2552_LIMIT_INT_COUNT, 0x00},
 53         {TAS2552_EDGE_RATE_CTRL, 0x40},
 54         {TAS2552_VBAT_DATA, 0x00},
 55 };
 56 
 57 #define TAS2552_NUM_SUPPLIES    3
 58 static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
 59         "vbat",         /* vbat voltage */
 60         "iovdd",        /* I/O Voltage */
 61         "avdd",         /* Analog DAC Voltage */
 62 };
 63 
 64 struct tas2552_data {
 65         struct snd_soc_component *component;
 66         struct regmap *regmap;
 67         struct i2c_client *tas2552_client;
 68         struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
 69         struct gpio_desc *enable_gpio;
 70         unsigned char regs[TAS2552_VBAT_DATA];
 71         unsigned int pll_clkin;
 72         int pll_clk_id;
 73         unsigned int pdm_clk;
 74         int pdm_clk_id;
 75 
 76         unsigned int dai_fmt;
 77         unsigned int tdm_delay;
 78 };
 79 
 80 static int tas2552_post_event(struct snd_soc_dapm_widget *w,
 81                               struct snd_kcontrol *kcontrol, int event)
 82 {
 83         struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 84 
 85         switch (event) {
 86         case SND_SOC_DAPM_POST_PMU:
 87                 snd_soc_component_write(component, TAS2552_RESERVED_0D, 0xc0);
 88                 snd_soc_component_update_bits(component, TAS2552_LIMIT_RATE_HYS, (1 << 5),
 89                                     (1 << 5));
 90                 snd_soc_component_update_bits(component, TAS2552_CFG_2, 1, 0);
 91                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_SWS, 0);
 92                 break;
 93         case SND_SOC_DAPM_POST_PMD:
 94                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_SWS,
 95                                     TAS2552_SWS);
 96                 snd_soc_component_update_bits(component, TAS2552_CFG_2, 1, 1);
 97                 snd_soc_component_update_bits(component, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
 98                 snd_soc_component_write(component, TAS2552_RESERVED_0D, 0xbe);
 99                 break;
100         }
101         return 0;
102 }
103 
104 /* Input mux controls */
105 static const char * const tas2552_input_texts[] = {
106         "Digital", "Analog" };
107 static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
108                             tas2552_input_texts);
109 
110 static const struct snd_kcontrol_new tas2552_input_mux_control =
111         SOC_DAPM_ENUM("Route", tas2552_input_mux_enum);
112 
113 static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
114 {
115         SND_SOC_DAPM_INPUT("IN"),
116 
117         /* MUX Controls */
118         SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
119                          &tas2552_input_mux_control),
120 
121         SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
122         SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
123         SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
124         SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
125         SND_SOC_DAPM_POST("Post Event", tas2552_post_event),
126 
127         SND_SOC_DAPM_OUTPUT("OUT")
128 };
129 
130 static const struct snd_soc_dapm_route tas2552_audio_map[] = {
131         {"DAC", NULL, "DAC IN"},
132         {"Input selection", "Digital", "DAC"},
133         {"Input selection", "Analog", "IN"},
134         {"ClassD", NULL, "Input selection"},
135         {"OUT", NULL, "ClassD"},
136         {"ClassD", NULL, "PLL"},
137 };
138 
139 #ifdef CONFIG_PM
140 static void tas2552_sw_shutdown(struct tas2552_data *tas2552, int sw_shutdown)
141 {
142         u8 cfg1_reg = 0;
143 
144         if (!tas2552->component)
145                 return;
146 
147         if (sw_shutdown)
148                 cfg1_reg = TAS2552_SWS;
149 
150         snd_soc_component_update_bits(tas2552->component, TAS2552_CFG_1, TAS2552_SWS,
151                             cfg1_reg);
152 }
153 #endif
154 
155 static int tas2552_setup_pll(struct snd_soc_component *component,
156                              struct snd_pcm_hw_params *params)
157 {
158         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
159         bool bypass_pll = false;
160         unsigned int pll_clk = params_rate(params) * 512;
161         unsigned int pll_clkin = tas2552->pll_clkin;
162         u8 pll_enable;
163 
164         if (!pll_clkin) {
165                 if (tas2552->pll_clk_id != TAS2552_PLL_CLKIN_BCLK)
166                         return -EINVAL;
167 
168                 pll_clkin = snd_soc_params_to_bclk(params);
169                 pll_clkin += tas2552->tdm_delay;
170         }
171 
172         pll_enable = snd_soc_component_read32(component, TAS2552_CFG_2) & TAS2552_PLL_ENABLE;
173         snd_soc_component_update_bits(component, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
174 
175         if (pll_clkin == pll_clk)
176                 bypass_pll = true;
177 
178         if (bypass_pll) {
179                 /* By pass the PLL configuration */
180                 snd_soc_component_update_bits(component, TAS2552_PLL_CTRL_2,
181                                     TAS2552_PLL_BYPASS, TAS2552_PLL_BYPASS);
182         } else {
183                 /* Fill in the PLL control registers for J & D
184                  * pll_clk = (.5 * pll_clkin * J.D) / 2^p
185                  * Need to fill in J and D here based on incoming freq
186                  */
187                 unsigned int d, q, t;
188                 u8 j;
189                 u8 pll_sel = (tas2552->pll_clk_id << 3) & TAS2552_PLL_SRC_MASK;
190                 u8 p = snd_soc_component_read32(component, TAS2552_PLL_CTRL_1);
191 
192                 p = (p >> 7);
193 
194 recalc:
195                 t = (pll_clk * 2) << p;
196                 j = t / pll_clkin;
197                 d = t % pll_clkin;
198                 t = pll_clkin / 10000;
199                 q = d / (t + 1);
200                 d = q + ((9999 - pll_clkin % 10000) * (d / t - q)) / 10000;
201 
202                 if (d && (pll_clkin < 512000 || pll_clkin > 9200000)) {
203                         if (tas2552->pll_clk_id == TAS2552_PLL_CLKIN_BCLK) {
204                                 pll_clkin = 1800000;
205                                 pll_sel = (TAS2552_PLL_CLKIN_1_8_FIXED << 3) &
206                                                         TAS2552_PLL_SRC_MASK;
207                         } else {
208                                 pll_clkin = snd_soc_params_to_bclk(params);
209                                 pll_clkin += tas2552->tdm_delay;
210                                 pll_sel = (TAS2552_PLL_CLKIN_BCLK << 3) &
211                                                         TAS2552_PLL_SRC_MASK;
212                         }
213                         goto recalc;
214                 }
215 
216                 snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_PLL_SRC_MASK,
217                                     pll_sel);
218 
219                 snd_soc_component_update_bits(component, TAS2552_PLL_CTRL_1,
220                                     TAS2552_PLL_J_MASK, j);
221                 /* Will clear the PLL_BYPASS bit */
222                 snd_soc_component_write(component, TAS2552_PLL_CTRL_2,
223                               TAS2552_PLL_D_UPPER(d));
224                 snd_soc_component_write(component, TAS2552_PLL_CTRL_3,
225                               TAS2552_PLL_D_LOWER(d));
226         }
227 
228         /* Restore PLL status */
229         snd_soc_component_update_bits(component, TAS2552_CFG_2, TAS2552_PLL_ENABLE,
230                             pll_enable);
231 
232         return 0;
233 }
234 
235 static int tas2552_hw_params(struct snd_pcm_substream *substream,
236                              struct snd_pcm_hw_params *params,
237                              struct snd_soc_dai *dai)
238 {
239         struct snd_soc_component *component = dai->component;
240         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
241         int cpf;
242         u8 ser_ctrl1_reg, wclk_rate;
243 
244         switch (params_width(params)) {
245         case 16:
246                 ser_ctrl1_reg = TAS2552_WORDLENGTH_16BIT;
247                 cpf = 32 + tas2552->tdm_delay;
248                 break;
249         case 20:
250                 ser_ctrl1_reg = TAS2552_WORDLENGTH_20BIT;
251                 cpf = 64 + tas2552->tdm_delay;
252                 break;
253         case 24:
254                 ser_ctrl1_reg = TAS2552_WORDLENGTH_24BIT;
255                 cpf = 64 + tas2552->tdm_delay;
256                 break;
257         case 32:
258                 ser_ctrl1_reg = TAS2552_WORDLENGTH_32BIT;
259                 cpf = 64 + tas2552->tdm_delay;
260                 break;
261         default:
262                 dev_err(component->dev, "Not supported sample size: %d\n",
263                         params_width(params));
264                 return -EINVAL;
265         }
266 
267         if (cpf <= 32)
268                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_32;
269         else if (cpf <= 64)
270                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_64;
271         else if (cpf <= 128)
272                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_128;
273         else
274                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_256;
275 
276         snd_soc_component_update_bits(component, TAS2552_SER_CTRL_1,
277                             TAS2552_WORDLENGTH_MASK | TAS2552_CLKSPERFRAME_MASK,
278                             ser_ctrl1_reg);
279 
280         switch (params_rate(params)) {
281         case 8000:
282                 wclk_rate = TAS2552_WCLK_FREQ_8KHZ;
283                 break;
284         case 11025:
285         case 12000:
286                 wclk_rate = TAS2552_WCLK_FREQ_11_12KHZ;
287                 break;
288         case 16000:
289                 wclk_rate = TAS2552_WCLK_FREQ_16KHZ;
290                 break;
291         case 22050:
292         case 24000:
293                 wclk_rate = TAS2552_WCLK_FREQ_22_24KHZ;
294                 break;
295         case 32000:
296                 wclk_rate = TAS2552_WCLK_FREQ_32KHZ;
297                 break;
298         case 44100:
299         case 48000:
300                 wclk_rate = TAS2552_WCLK_FREQ_44_48KHZ;
301                 break;
302         case 88200:
303         case 96000:
304                 wclk_rate = TAS2552_WCLK_FREQ_88_96KHZ;
305                 break;
306         case 176400:
307         case 192000:
308                 wclk_rate = TAS2552_WCLK_FREQ_176_192KHZ;
309                 break;
310         default:
311                 dev_err(component->dev, "Not supported sample rate: %d\n",
312                         params_rate(params));
313                 return -EINVAL;
314         }
315 
316         snd_soc_component_update_bits(component, TAS2552_CFG_3, TAS2552_WCLK_FREQ_MASK,
317                             wclk_rate);
318 
319         return tas2552_setup_pll(component, params);
320 }
321 
322 #define TAS2552_DAI_FMT_MASK    (TAS2552_BCLKDIR | \
323                                  TAS2552_WCLKDIR | \
324                                  TAS2552_DATAFORMAT_MASK)
325 static int tas2552_prepare(struct snd_pcm_substream *substream,
326                            struct snd_soc_dai *dai)
327 {
328         struct snd_soc_component *component = dai->component;
329         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
330         int delay = 0;
331 
332         /* TDM slot selection only valid in DSP_A/_B mode */
333         if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
334                 delay += (tas2552->tdm_delay + 1);
335         else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
336                 delay += tas2552->tdm_delay;
337 
338         /* Configure data delay */
339         snd_soc_component_write(component, TAS2552_SER_CTRL_2, delay);
340 
341         return 0;
342 }
343 
344 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
345 {
346         struct snd_soc_component *component = dai->component;
347         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
348         u8 serial_format;
349 
350         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
351         case SND_SOC_DAIFMT_CBS_CFS:
352                 serial_format = 0x00;
353                 break;
354         case SND_SOC_DAIFMT_CBS_CFM:
355                 serial_format = TAS2552_WCLKDIR;
356                 break;
357         case SND_SOC_DAIFMT_CBM_CFS:
358                 serial_format = TAS2552_BCLKDIR;
359                 break;
360         case SND_SOC_DAIFMT_CBM_CFM:
361                 serial_format = (TAS2552_BCLKDIR | TAS2552_WCLKDIR);
362                 break;
363         default:
364                 dev_vdbg(component->dev, "DAI Format master is not found\n");
365                 return -EINVAL;
366         }
367 
368         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
369                        SND_SOC_DAIFMT_INV_MASK)) {
370         case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
371                 break;
372         case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF):
373         case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF):
374                 serial_format |= TAS2552_DATAFORMAT_DSP;
375                 break;
376         case (SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_NB_NF):
377                 serial_format |= TAS2552_DATAFORMAT_RIGHT_J;
378                 break;
379         case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
380                 serial_format |= TAS2552_DATAFORMAT_LEFT_J;
381                 break;
382         default:
383                 dev_vdbg(component->dev, "DAI Format is not found\n");
384                 return -EINVAL;
385         }
386         tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
387 
388         snd_soc_component_update_bits(component, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
389                             serial_format);
390         return 0;
391 }
392 
393 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
394                                   unsigned int freq, int dir)
395 {
396         struct snd_soc_component *component = dai->component;
397         struct tas2552_data *tas2552 = dev_get_drvdata(component->dev);
398         u8 reg, mask, val;
399 
400         switch (clk_id) {
401         case TAS2552_PLL_CLKIN_MCLK:
402         case TAS2552_PLL_CLKIN_IVCLKIN:
403                 if (freq < 512000 || freq > 24576000) {
404                         /* out of range PLL_CLKIN, fall back to use BCLK */
405                         dev_warn(component->dev, "Out of range PLL_CLKIN: %u\n",
406                                  freq);
407                         clk_id = TAS2552_PLL_CLKIN_BCLK;
408                         freq = 0;
409                 }
410                 /* fall through */
411         case TAS2552_PLL_CLKIN_BCLK:
412         case TAS2552_PLL_CLKIN_1_8_FIXED:
413                 mask = TAS2552_PLL_SRC_MASK;
414                 val = (clk_id << 3) & mask; /* bit 4:5 in the register */
415                 reg = TAS2552_CFG_1;
416                 tas2552->pll_clk_id = clk_id;
417                 tas2552->pll_clkin = freq;
418                 break;
419         case TAS2552_PDM_CLK_PLL:
420         case TAS2552_PDM_CLK_IVCLKIN:
421         case TAS2552_PDM_CLK_BCLK:
422         case TAS2552_PDM_CLK_MCLK:
423                 mask = TAS2552_PDM_CLK_SEL_MASK;
424                 val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
425                 reg = TAS2552_PDM_CFG;
426                 tas2552->pdm_clk_id = clk_id;
427                 tas2552->pdm_clk = freq;
428                 break;
429         default:
430                 dev_err(component->dev, "Invalid clk id: %d\n", clk_id);
431                 return -EINVAL;
432         }
433 
434         snd_soc_component_update_bits(component, reg, mask, val);
435 
436         return 0;
437 }
438 
439 static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
440                                     unsigned int tx_mask, unsigned int rx_mask,
441                                     int slots, int slot_width)
442 {
443         struct snd_soc_component *component = dai->component;
444         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
445         unsigned int lsb;
446 
447         if (unlikely(!tx_mask)) {
448                 dev_err(component->dev, "tx masks need to be non 0\n");
449                 return -EINVAL;
450         }
451 
452         /* TDM based on DSP mode requires slots to be adjacent */
453         lsb = __ffs(tx_mask);
454         if ((lsb + 1) != __fls(tx_mask)) {
455                 dev_err(component->dev, "Invalid mask, slots must be adjacent\n");
456                 return -EINVAL;
457         }
458 
459         tas2552->tdm_delay = lsb * slot_width;
460 
461         /* DOUT in high-impedance on inactive bit clocks */
462         snd_soc_component_update_bits(component, TAS2552_DOUT,
463                             TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);
464 
465         return 0;
466 }
467 
468 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
469 {
470         u8 cfg1_reg = 0;
471         struct snd_soc_component *component = dai->component;
472 
473         if (mute)
474                 cfg1_reg |= TAS2552_MUTE;
475 
476         snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);
477 
478         return 0;
479 }
480 
481 #ifdef CONFIG_PM
482 static int tas2552_runtime_suspend(struct device *dev)
483 {
484         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
485 
486         tas2552_sw_shutdown(tas2552, 1);
487 
488         regcache_cache_only(tas2552->regmap, true);
489         regcache_mark_dirty(tas2552->regmap);
490 
491         gpiod_set_value(tas2552->enable_gpio, 0);
492 
493         return 0;
494 }
495 
496 static int tas2552_runtime_resume(struct device *dev)
497 {
498         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
499 
500         gpiod_set_value(tas2552->enable_gpio, 1);
501 
502         tas2552_sw_shutdown(tas2552, 0);
503 
504         regcache_cache_only(tas2552->regmap, false);
505         regcache_sync(tas2552->regmap);
506 
507         return 0;
508 }
509 #endif
510 
511 static const struct dev_pm_ops tas2552_pm = {
512         SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
513                            NULL)
514 };
515 
516 static const struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
517         .hw_params      = tas2552_hw_params,
518         .prepare        = tas2552_prepare,
519         .set_sysclk     = tas2552_set_dai_sysclk,
520         .set_fmt        = tas2552_set_dai_fmt,
521         .set_tdm_slot   = tas2552_set_dai_tdm_slot,
522         .digital_mute = tas2552_mute,
523 };
524 
525 /* Formats supported by TAS2552 driver. */
526 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
527                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
528 
529 /* TAS2552 dai structure. */
530 static struct snd_soc_dai_driver tas2552_dai[] = {
531         {
532                 .name = "tas2552-amplifier",
533                 .playback = {
534                         .stream_name = "Playback",
535                         .channels_min = 2,
536                         .channels_max = 2,
537                         .rates = SNDRV_PCM_RATE_8000_192000,
538                         .formats = TAS2552_FORMATS,
539                 },
540                 .ops = &tas2552_speaker_dai_ops,
541         },
542 };
543 
544 /*
545  * DAC digital volumes. From -7 to 24 dB in 1 dB steps
546  */
547 static DECLARE_TLV_DB_SCALE(dac_tlv, -700, 100, 0);
548 
549 static const char * const tas2552_din_source_select[] = {
550         "Muted",
551         "Left",
552         "Right",
553         "Left + Right average",
554 };
555 static SOC_ENUM_SINGLE_DECL(tas2552_din_source_enum,
556                             TAS2552_CFG_3, 3,
557                             tas2552_din_source_select);
558 
559 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
560         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
561                          TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
562         SOC_ENUM("DIN source", tas2552_din_source_enum),
563 };
564 
565 static int tas2552_component_probe(struct snd_soc_component *component)
566 {
567         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
568         int ret;
569 
570         tas2552->component = component;
571 
572         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
573                                     tas2552->supplies);
574 
575         if (ret != 0) {
576                 dev_err(component->dev, "Failed to enable supplies: %d\n",
577                         ret);
578                 return ret;
579         }
580 
581         gpiod_set_value(tas2552->enable_gpio, 1);
582 
583         ret = pm_runtime_get_sync(component->dev);
584         if (ret < 0) {
585                 dev_err(component->dev, "Enabling device failed: %d\n",
586                         ret);
587                 goto probe_fail;
588         }
589 
590         snd_soc_component_update_bits(component, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
591         snd_soc_component_write(component, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
592                                             TAS2552_DIN_SRC_SEL_AVG_L_R);
593         snd_soc_component_write(component, TAS2552_OUTPUT_DATA,
594                       TAS2552_PDM_DATA_SEL_V_I |
595                       TAS2552_R_DATA_OUT(TAS2552_DATA_OUT_V_DATA));
596         snd_soc_component_write(component, TAS2552_BOOST_APT_CTRL, TAS2552_APT_DELAY_200 |
597                                                      TAS2552_APT_THRESH_20_17);
598 
599         snd_soc_component_write(component, TAS2552_CFG_2, TAS2552_BOOST_EN | TAS2552_APT_EN |
600                                             TAS2552_LIM_EN);
601 
602         return 0;
603 
604 probe_fail:
605         gpiod_set_value(tas2552->enable_gpio, 0);
606 
607         regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
608                                         tas2552->supplies);
609         return ret;
610 }
611 
612 static void tas2552_component_remove(struct snd_soc_component *component)
613 {
614         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
615 
616         pm_runtime_put(component->dev);
617 
618         gpiod_set_value(tas2552->enable_gpio, 0);
619 };
620 
621 #ifdef CONFIG_PM
622 static int tas2552_suspend(struct snd_soc_component *component)
623 {
624         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
625         int ret;
626 
627         ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
628                                         tas2552->supplies);
629 
630         if (ret != 0)
631                 dev_err(component->dev, "Failed to disable supplies: %d\n",
632                         ret);
633         return ret;
634 }
635 
636 static int tas2552_resume(struct snd_soc_component *component)
637 {
638         struct tas2552_data *tas2552 = snd_soc_component_get_drvdata(component);
639         int ret;
640 
641         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
642                                     tas2552->supplies);
643 
644         if (ret != 0) {
645                 dev_err(component->dev, "Failed to enable supplies: %d\n",
646                         ret);
647         }
648 
649         return ret;
650 }
651 #else
652 #define tas2552_suspend NULL
653 #define tas2552_resume NULL
654 #endif
655 
656 static const struct snd_soc_component_driver soc_component_dev_tas2552 = {
657         .probe                  = tas2552_component_probe,
658         .remove                 = tas2552_component_remove,
659         .suspend                = tas2552_suspend,
660         .resume                 = tas2552_resume,
661         .controls               = tas2552_snd_controls,
662         .num_controls           = ARRAY_SIZE(tas2552_snd_controls),
663         .dapm_widgets           = tas2552_dapm_widgets,
664         .num_dapm_widgets       = ARRAY_SIZE(tas2552_dapm_widgets),
665         .dapm_routes            = tas2552_audio_map,
666         .num_dapm_routes        = ARRAY_SIZE(tas2552_audio_map),
667         .idle_bias_on           = 1,
668         .endianness             = 1,
669         .non_legacy_dai_naming  = 1,
670 };
671 
672 static const struct regmap_config tas2552_regmap_config = {
673         .reg_bits = 8,
674         .val_bits = 8,
675 
676         .max_register = TAS2552_MAX_REG,
677         .reg_defaults = tas2552_reg_defs,
678         .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
679         .cache_type = REGCACHE_RBTREE,
680 };
681 
682 static int tas2552_probe(struct i2c_client *client,
683                            const struct i2c_device_id *id)
684 {
685         struct device *dev;
686         struct tas2552_data *data;
687         int ret;
688         int i;
689 
690         dev = &client->dev;
691         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
692         if (data == NULL)
693                 return -ENOMEM;
694 
695         data->enable_gpio = devm_gpiod_get_optional(dev, "enable",
696                                                     GPIOD_OUT_LOW);
697         if (IS_ERR(data->enable_gpio))
698                 return PTR_ERR(data->enable_gpio);
699 
700         data->tas2552_client = client;
701         data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
702         if (IS_ERR(data->regmap)) {
703                 ret = PTR_ERR(data->regmap);
704                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
705                         ret);
706                 return ret;
707         }
708 
709         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
710                 data->supplies[i].supply = tas2552_supply_names[i];
711 
712         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
713                                       data->supplies);
714         if (ret != 0) {
715                 dev_err(dev, "Failed to request supplies: %d\n", ret);
716                 return ret;
717         }
718 
719         pm_runtime_set_active(&client->dev);
720         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
721         pm_runtime_use_autosuspend(&client->dev);
722         pm_runtime_enable(&client->dev);
723         pm_runtime_mark_last_busy(&client->dev);
724         pm_runtime_put_sync_autosuspend(&client->dev);
725 
726         dev_set_drvdata(&client->dev, data);
727 
728         ret = devm_snd_soc_register_component(&client->dev,
729                                       &soc_component_dev_tas2552,
730                                       tas2552_dai, ARRAY_SIZE(tas2552_dai));
731         if (ret < 0)
732                 dev_err(&client->dev, "Failed to register component: %d\n", ret);
733 
734         return ret;
735 }
736 
737 static int tas2552_i2c_remove(struct i2c_client *client)
738 {
739         pm_runtime_disable(&client->dev);
740         return 0;
741 }
742 
743 static const struct i2c_device_id tas2552_id[] = {
744         { "tas2552", 0 },
745         { }
746 };
747 MODULE_DEVICE_TABLE(i2c, tas2552_id);
748 
749 #if IS_ENABLED(CONFIG_OF)
750 static const struct of_device_id tas2552_of_match[] = {
751         { .compatible = "ti,tas2552", },
752         {},
753 };
754 MODULE_DEVICE_TABLE(of, tas2552_of_match);
755 #endif
756 
757 static struct i2c_driver tas2552_i2c_driver = {
758         .driver = {
759                 .name = "tas2552",
760                 .of_match_table = of_match_ptr(tas2552_of_match),
761                 .pm = &tas2552_pm,
762         },
763         .probe = tas2552_probe,
764         .remove = tas2552_i2c_remove,
765         .id_table = tas2552_id,
766 };
767 
768 module_i2c_driver(tas2552_i2c_driver);
769 
770 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
771 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
772 MODULE_LICENSE("GPL");
773 

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