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