1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // tegra210_amx.c - Tegra210 AMX driver 4 // 5 // Copyright (c) 2021 NVIDIA CORPORATION. All rights reserved. 6 7 #include <linux/clk.h> 8 #include <linux/device.h> 9 #include <linux/io.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/of_device.h> 13 #include <linux/platform_device.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regmap.h> 16 #include <sound/core.h> 17 #include <sound/pcm.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 21 #include "tegra210_amx.h" 22 #include "tegra_cif.h" 23 24 /* 25 * The counter is in terms of AHUB clock cycles. If a frame is not 26 * received within these clock cycles, the AMX input channel gets 27 * automatically disabled. For now the counter is calculated as a 28 * function of sample rate (8 kHz) and AHUB clock (49.152 MHz). 29 * If later an accurate number is needed, the counter needs to be 30 * calculated at runtime. 31 * 32 * count = ahub_clk / sample_rate 33 */ 34 #define TEGRA194_MAX_FRAME_IDLE_COUNT 0x1800 35 36 #define AMX_CH_REG(id, reg) ((reg) + ((id) * TEGRA210_AMX_AUDIOCIF_CH_STRIDE)) 37 38 static const struct reg_default tegra210_amx_reg_defaults[] = { 39 { TEGRA210_AMX_RX_INT_MASK, 0x0000000f}, 40 { TEGRA210_AMX_RX1_CIF_CTRL, 0x00007000}, 41 { TEGRA210_AMX_RX2_CIF_CTRL, 0x00007000}, 42 { TEGRA210_AMX_RX3_CIF_CTRL, 0x00007000}, 43 { TEGRA210_AMX_RX4_CIF_CTRL, 0x00007000}, 44 { TEGRA210_AMX_TX_INT_MASK, 0x00000001}, 45 { TEGRA210_AMX_TX_CIF_CTRL, 0x00007000}, 46 { TEGRA210_AMX_CG, 0x1}, 47 { TEGRA210_AMX_CFG_RAM_CTRL, 0x00004000}, 48 }; 49 50 static void tegra210_amx_write_map_ram(struct tegra210_amx *amx) 51 { 52 int i; 53 54 regmap_write(amx->regmap, TEGRA210_AMX_CFG_RAM_CTRL, 55 TEGRA210_AMX_CFG_RAM_CTRL_SEQ_ACCESS_EN | 56 TEGRA210_AMX_CFG_RAM_CTRL_ADDR_INIT_EN | 57 TEGRA210_AMX_CFG_RAM_CTRL_RW_WRITE); 58 59 for (i = 0; i < TEGRA210_AMX_RAM_DEPTH; i++) 60 regmap_write(amx->regmap, TEGRA210_AMX_CFG_RAM_DATA, 61 amx->map[i]); 62 63 regmap_write(amx->regmap, TEGRA210_AMX_OUT_BYTE_EN0, amx->byte_mask[0]); 64 regmap_write(amx->regmap, TEGRA210_AMX_OUT_BYTE_EN1, amx->byte_mask[1]); 65 } 66 67 static int tegra210_amx_startup(struct snd_pcm_substream *substream, 68 struct snd_soc_dai *dai) 69 { 70 struct tegra210_amx *amx = snd_soc_dai_get_drvdata(dai); 71 unsigned int val; 72 int err; 73 74 /* Ensure if AMX is disabled */ 75 err = regmap_read_poll_timeout(amx->regmap, TEGRA210_AMX_STATUS, val, 76 !(val & 0x1), 10, 10000); 77 if (err < 0) { 78 dev_err(dai->dev, "failed to stop AMX, err = %d\n", err); 79 return err; 80 } 81 82 /* 83 * Soft Reset: Below performs module soft reset which clears 84 * all FSM logic, flushes flow control of FIFO and resets the 85 * state register. It also brings module back to disabled 86 * state (without flushing the data in the pipe). 87 */ 88 regmap_update_bits(amx->regmap, TEGRA210_AMX_SOFT_RESET, 89 TEGRA210_AMX_SOFT_RESET_SOFT_RESET_MASK, 90 TEGRA210_AMX_SOFT_RESET_SOFT_EN); 91 92 err = regmap_read_poll_timeout(amx->regmap, TEGRA210_AMX_SOFT_RESET, 93 val, !(val & 0x1), 10, 10000); 94 if (err < 0) { 95 dev_err(dai->dev, "failed to reset AMX, err = %d\n", err); 96 return err; 97 } 98 99 return 0; 100 } 101 102 static int __maybe_unused tegra210_amx_runtime_suspend(struct device *dev) 103 { 104 struct tegra210_amx *amx = dev_get_drvdata(dev); 105 106 regcache_cache_only(amx->regmap, true); 107 regcache_mark_dirty(amx->regmap); 108 109 return 0; 110 } 111 112 static int __maybe_unused tegra210_amx_runtime_resume(struct device *dev) 113 { 114 struct tegra210_amx *amx = dev_get_drvdata(dev); 115 116 regcache_cache_only(amx->regmap, false); 117 regcache_sync(amx->regmap); 118 119 regmap_update_bits(amx->regmap, 120 TEGRA210_AMX_CTRL, 121 TEGRA210_AMX_CTRL_RX_DEP_MASK, 122 TEGRA210_AMX_WAIT_ON_ANY << TEGRA210_AMX_CTRL_RX_DEP_SHIFT); 123 124 tegra210_amx_write_map_ram(amx); 125 126 return 0; 127 } 128 129 static int tegra210_amx_set_audio_cif(struct snd_soc_dai *dai, 130 struct snd_pcm_hw_params *params, 131 unsigned int reg) 132 { 133 struct tegra210_amx *amx = snd_soc_dai_get_drvdata(dai); 134 int channels, audio_bits; 135 struct tegra_cif_conf cif_conf; 136 137 memset(&cif_conf, 0, sizeof(struct tegra_cif_conf)); 138 139 channels = params_channels(params); 140 141 switch (params_format(params)) { 142 case SNDRV_PCM_FORMAT_S8: 143 audio_bits = TEGRA_ACIF_BITS_8; 144 break; 145 case SNDRV_PCM_FORMAT_S16_LE: 146 audio_bits = TEGRA_ACIF_BITS_16; 147 break; 148 case SNDRV_PCM_FORMAT_S32_LE: 149 audio_bits = TEGRA_ACIF_BITS_32; 150 break; 151 default: 152 return -EINVAL; 153 } 154 155 cif_conf.audio_ch = channels; 156 cif_conf.client_ch = channels; 157 cif_conf.audio_bits = audio_bits; 158 cif_conf.client_bits = audio_bits; 159 160 tegra_set_cif(amx->regmap, reg, &cif_conf); 161 162 return 0; 163 } 164 165 static int tegra210_amx_in_hw_params(struct snd_pcm_substream *substream, 166 struct snd_pcm_hw_params *params, 167 struct snd_soc_dai *dai) 168 { 169 struct tegra210_amx *amx = snd_soc_dai_get_drvdata(dai); 170 171 if (amx->soc_data->auto_disable) { 172 regmap_write(amx->regmap, 173 AMX_CH_REG(dai->id, TEGRA194_AMX_RX1_FRAME_PERIOD), 174 TEGRA194_MAX_FRAME_IDLE_COUNT); 175 regmap_write(amx->regmap, TEGRA210_AMX_CYA, 1); 176 } 177 178 return tegra210_amx_set_audio_cif(dai, params, 179 AMX_CH_REG(dai->id, TEGRA210_AMX_RX1_CIF_CTRL)); 180 } 181 182 static int tegra210_amx_out_hw_params(struct snd_pcm_substream *substream, 183 struct snd_pcm_hw_params *params, 184 struct snd_soc_dai *dai) 185 { 186 return tegra210_amx_set_audio_cif(dai, params, 187 TEGRA210_AMX_TX_CIF_CTRL); 188 } 189 190 static int tegra210_amx_get_byte_map(struct snd_kcontrol *kcontrol, 191 struct snd_ctl_elem_value *ucontrol) 192 { 193 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol); 194 struct soc_mixer_control *mc = 195 (struct soc_mixer_control *)kcontrol->private_value; 196 struct tegra210_amx *amx = snd_soc_component_get_drvdata(cmpnt); 197 unsigned char *bytes_map = (unsigned char *)&amx->map; 198 int reg = mc->reg; 199 int enabled; 200 201 if (reg > 31) 202 enabled = amx->byte_mask[1] & (1 << (reg - 32)); 203 else 204 enabled = amx->byte_mask[0] & (1 << reg); 205 206 if (enabled) 207 ucontrol->value.integer.value[0] = bytes_map[reg]; 208 else 209 ucontrol->value.integer.value[0] = 0; 210 211 return 0; 212 } 213 214 static int tegra210_amx_put_byte_map(struct snd_kcontrol *kcontrol, 215 struct snd_ctl_elem_value *ucontrol) 216 { 217 struct soc_mixer_control *mc = 218 (struct soc_mixer_control *)kcontrol->private_value; 219 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol); 220 struct tegra210_amx *amx = snd_soc_component_get_drvdata(cmpnt); 221 unsigned char *bytes_map = (unsigned char *)&amx->map; 222 int reg = mc->reg; 223 int value = ucontrol->value.integer.value[0]; 224 225 if (value == bytes_map[reg]) 226 return 0; 227 228 if (value >= 0 && value <= 255) { 229 /* Update byte map and enable slot */ 230 bytes_map[reg] = value; 231 if (reg > 31) 232 amx->byte_mask[1] |= (1 << (reg - 32)); 233 else 234 amx->byte_mask[0] |= (1 << reg); 235 } else { 236 /* Reset byte map and disable slot */ 237 bytes_map[reg] = 0; 238 if (reg > 31) 239 amx->byte_mask[1] &= ~(1 << (reg - 32)); 240 else 241 amx->byte_mask[0] &= ~(1 << reg); 242 } 243 244 return 1; 245 } 246 247 static const struct snd_soc_dai_ops tegra210_amx_out_dai_ops = { 248 .hw_params = tegra210_amx_out_hw_params, 249 .startup = tegra210_amx_startup, 250 }; 251 252 static const struct snd_soc_dai_ops tegra210_amx_in_dai_ops = { 253 .hw_params = tegra210_amx_in_hw_params, 254 }; 255 256 #define IN_DAI(id) \ 257 { \ 258 .name = "AMX-RX-CIF" #id, \ 259 .playback = { \ 260 .stream_name = "RX" #id "-CIF-Playback",\ 261 .channels_min = 1, \ 262 .channels_max = 16, \ 263 .rates = SNDRV_PCM_RATE_8000_192000, \ 264 .formats = SNDRV_PCM_FMTBIT_S8 | \ 265 SNDRV_PCM_FMTBIT_S16_LE | \ 266 SNDRV_PCM_FMTBIT_S32_LE, \ 267 }, \ 268 .capture = { \ 269 .stream_name = "RX" #id "-CIF-Capture", \ 270 .channels_min = 1, \ 271 .channels_max = 16, \ 272 .rates = SNDRV_PCM_RATE_8000_192000, \ 273 .formats = SNDRV_PCM_FMTBIT_S8 | \ 274 SNDRV_PCM_FMTBIT_S16_LE | \ 275 SNDRV_PCM_FMTBIT_S32_LE, \ 276 }, \ 277 .ops = &tegra210_amx_in_dai_ops, \ 278 } 279 280 #define OUT_DAI \ 281 { \ 282 .name = "AMX-TX-CIF", \ 283 .playback = { \ 284 .stream_name = "TX-CIF-Playback", \ 285 .channels_min = 1, \ 286 .channels_max = 16, \ 287 .rates = SNDRV_PCM_RATE_8000_192000, \ 288 .formats = SNDRV_PCM_FMTBIT_S8 | \ 289 SNDRV_PCM_FMTBIT_S16_LE | \ 290 SNDRV_PCM_FMTBIT_S32_LE, \ 291 }, \ 292 .capture = { \ 293 .stream_name = "TX-CIF-Capture", \ 294 .channels_min = 1, \ 295 .channels_max = 16, \ 296 .rates = SNDRV_PCM_RATE_8000_192000, \ 297 .formats = SNDRV_PCM_FMTBIT_S8 | \ 298 SNDRV_PCM_FMTBIT_S16_LE | \ 299 SNDRV_PCM_FMTBIT_S32_LE, \ 300 }, \ 301 .ops = &tegra210_amx_out_dai_ops, \ 302 } 303 304 static struct snd_soc_dai_driver tegra210_amx_dais[] = { 305 IN_DAI(1), 306 IN_DAI(2), 307 IN_DAI(3), 308 IN_DAI(4), 309 OUT_DAI, 310 }; 311 312 static const struct snd_soc_dapm_widget tegra210_amx_widgets[] = { 313 SND_SOC_DAPM_AIF_IN("RX1", NULL, 0, TEGRA210_AMX_CTRL, 0, 0), 314 SND_SOC_DAPM_AIF_IN("RX2", NULL, 0, TEGRA210_AMX_CTRL, 1, 0), 315 SND_SOC_DAPM_AIF_IN("RX3", NULL, 0, TEGRA210_AMX_CTRL, 2, 0), 316 SND_SOC_DAPM_AIF_IN("RX4", NULL, 0, TEGRA210_AMX_CTRL, 3, 0), 317 SND_SOC_DAPM_AIF_OUT("TX", NULL, 0, TEGRA210_AMX_ENABLE, 318 TEGRA210_AMX_ENABLE_SHIFT, 0), 319 }; 320 321 #define STREAM_ROUTES(id, sname) \ 322 { "RX" #id " XBAR-" sname, NULL, "RX" #id " XBAR-TX" }, \ 323 { "RX" #id "-CIF-" sname, NULL, "RX" #id " XBAR-" sname },\ 324 { "RX" #id, NULL, "RX" #id "-CIF-" sname }, \ 325 { "TX", NULL, "RX" #id }, \ 326 { "TX-CIF-" sname, NULL, "TX" }, \ 327 { "XBAR-" sname, NULL, "TX-CIF-" sname }, \ 328 { "XBAR-RX", NULL, "XBAR-" sname } 329 330 #define AMX_ROUTES(id) \ 331 STREAM_ROUTES(id, "Playback"), \ 332 STREAM_ROUTES(id, "Capture") 333 334 static const struct snd_soc_dapm_route tegra210_amx_routes[] = { 335 AMX_ROUTES(1), 336 AMX_ROUTES(2), 337 AMX_ROUTES(3), 338 AMX_ROUTES(4), 339 }; 340 341 #define TEGRA210_AMX_BYTE_MAP_CTRL(reg) \ 342 SOC_SINGLE_EXT("Byte Map " #reg, reg, 0, 256, 0, \ 343 tegra210_amx_get_byte_map, \ 344 tegra210_amx_put_byte_map) 345 346 static struct snd_kcontrol_new tegra210_amx_controls[] = { 347 TEGRA210_AMX_BYTE_MAP_CTRL(0), 348 TEGRA210_AMX_BYTE_MAP_CTRL(1), 349 TEGRA210_AMX_BYTE_MAP_CTRL(2), 350 TEGRA210_AMX_BYTE_MAP_CTRL(3), 351 TEGRA210_AMX_BYTE_MAP_CTRL(4), 352 TEGRA210_AMX_BYTE_MAP_CTRL(5), 353 TEGRA210_AMX_BYTE_MAP_CTRL(6), 354 TEGRA210_AMX_BYTE_MAP_CTRL(7), 355 TEGRA210_AMX_BYTE_MAP_CTRL(8), 356 TEGRA210_AMX_BYTE_MAP_CTRL(9), 357 TEGRA210_AMX_BYTE_MAP_CTRL(10), 358 TEGRA210_AMX_BYTE_MAP_CTRL(11), 359 TEGRA210_AMX_BYTE_MAP_CTRL(12), 360 TEGRA210_AMX_BYTE_MAP_CTRL(13), 361 TEGRA210_AMX_BYTE_MAP_CTRL(14), 362 TEGRA210_AMX_BYTE_MAP_CTRL(15), 363 TEGRA210_AMX_BYTE_MAP_CTRL(16), 364 TEGRA210_AMX_BYTE_MAP_CTRL(17), 365 TEGRA210_AMX_BYTE_MAP_CTRL(18), 366 TEGRA210_AMX_BYTE_MAP_CTRL(19), 367 TEGRA210_AMX_BYTE_MAP_CTRL(20), 368 TEGRA210_AMX_BYTE_MAP_CTRL(21), 369 TEGRA210_AMX_BYTE_MAP_CTRL(22), 370 TEGRA210_AMX_BYTE_MAP_CTRL(23), 371 TEGRA210_AMX_BYTE_MAP_CTRL(24), 372 TEGRA210_AMX_BYTE_MAP_CTRL(25), 373 TEGRA210_AMX_BYTE_MAP_CTRL(26), 374 TEGRA210_AMX_BYTE_MAP_CTRL(27), 375 TEGRA210_AMX_BYTE_MAP_CTRL(28), 376 TEGRA210_AMX_BYTE_MAP_CTRL(29), 377 TEGRA210_AMX_BYTE_MAP_CTRL(30), 378 TEGRA210_AMX_BYTE_MAP_CTRL(31), 379 TEGRA210_AMX_BYTE_MAP_CTRL(32), 380 TEGRA210_AMX_BYTE_MAP_CTRL(33), 381 TEGRA210_AMX_BYTE_MAP_CTRL(34), 382 TEGRA210_AMX_BYTE_MAP_CTRL(35), 383 TEGRA210_AMX_BYTE_MAP_CTRL(36), 384 TEGRA210_AMX_BYTE_MAP_CTRL(37), 385 TEGRA210_AMX_BYTE_MAP_CTRL(38), 386 TEGRA210_AMX_BYTE_MAP_CTRL(39), 387 TEGRA210_AMX_BYTE_MAP_CTRL(40), 388 TEGRA210_AMX_BYTE_MAP_CTRL(41), 389 TEGRA210_AMX_BYTE_MAP_CTRL(42), 390 TEGRA210_AMX_BYTE_MAP_CTRL(43), 391 TEGRA210_AMX_BYTE_MAP_CTRL(44), 392 TEGRA210_AMX_BYTE_MAP_CTRL(45), 393 TEGRA210_AMX_BYTE_MAP_CTRL(46), 394 TEGRA210_AMX_BYTE_MAP_CTRL(47), 395 TEGRA210_AMX_BYTE_MAP_CTRL(48), 396 TEGRA210_AMX_BYTE_MAP_CTRL(49), 397 TEGRA210_AMX_BYTE_MAP_CTRL(50), 398 TEGRA210_AMX_BYTE_MAP_CTRL(51), 399 TEGRA210_AMX_BYTE_MAP_CTRL(52), 400 TEGRA210_AMX_BYTE_MAP_CTRL(53), 401 TEGRA210_AMX_BYTE_MAP_CTRL(54), 402 TEGRA210_AMX_BYTE_MAP_CTRL(55), 403 TEGRA210_AMX_BYTE_MAP_CTRL(56), 404 TEGRA210_AMX_BYTE_MAP_CTRL(57), 405 TEGRA210_AMX_BYTE_MAP_CTRL(58), 406 TEGRA210_AMX_BYTE_MAP_CTRL(59), 407 TEGRA210_AMX_BYTE_MAP_CTRL(60), 408 TEGRA210_AMX_BYTE_MAP_CTRL(61), 409 TEGRA210_AMX_BYTE_MAP_CTRL(62), 410 TEGRA210_AMX_BYTE_MAP_CTRL(63), 411 }; 412 413 static const struct snd_soc_component_driver tegra210_amx_cmpnt = { 414 .dapm_widgets = tegra210_amx_widgets, 415 .num_dapm_widgets = ARRAY_SIZE(tegra210_amx_widgets), 416 .dapm_routes = tegra210_amx_routes, 417 .num_dapm_routes = ARRAY_SIZE(tegra210_amx_routes), 418 .controls = tegra210_amx_controls, 419 .num_controls = ARRAY_SIZE(tegra210_amx_controls), 420 }; 421 422 static bool tegra210_amx_wr_reg(struct device *dev, unsigned int reg) 423 { 424 switch (reg) { 425 case TEGRA210_AMX_RX_INT_MASK ... TEGRA210_AMX_RX4_CIF_CTRL: 426 case TEGRA210_AMX_TX_INT_MASK ... TEGRA210_AMX_CG: 427 case TEGRA210_AMX_CTRL ... TEGRA210_AMX_CYA: 428 case TEGRA210_AMX_CFG_RAM_CTRL ... TEGRA210_AMX_CFG_RAM_DATA: 429 return true; 430 default: 431 return false; 432 } 433 } 434 435 static bool tegra194_amx_wr_reg(struct device *dev, unsigned int reg) 436 { 437 switch (reg) { 438 case TEGRA194_AMX_RX1_FRAME_PERIOD ... TEGRA194_AMX_RX4_FRAME_PERIOD: 439 return true; 440 default: 441 return tegra210_amx_wr_reg(dev, reg); 442 } 443 } 444 445 static bool tegra210_amx_rd_reg(struct device *dev, unsigned int reg) 446 { 447 switch (reg) { 448 case TEGRA210_AMX_RX_STATUS ... TEGRA210_AMX_CFG_RAM_DATA: 449 return true; 450 default: 451 return false; 452 } 453 } 454 455 static bool tegra194_amx_rd_reg(struct device *dev, unsigned int reg) 456 { 457 switch (reg) { 458 case TEGRA194_AMX_RX1_FRAME_PERIOD ... TEGRA194_AMX_RX4_FRAME_PERIOD: 459 return true; 460 default: 461 return tegra210_amx_rd_reg(dev, reg); 462 } 463 } 464 465 static bool tegra210_amx_volatile_reg(struct device *dev, unsigned int reg) 466 { 467 switch (reg) { 468 case TEGRA210_AMX_RX_STATUS: 469 case TEGRA210_AMX_RX_INT_STATUS: 470 case TEGRA210_AMX_RX_INT_SET: 471 case TEGRA210_AMX_TX_STATUS: 472 case TEGRA210_AMX_TX_INT_STATUS: 473 case TEGRA210_AMX_TX_INT_SET: 474 case TEGRA210_AMX_SOFT_RESET: 475 case TEGRA210_AMX_STATUS: 476 case TEGRA210_AMX_INT_STATUS: 477 case TEGRA210_AMX_CFG_RAM_CTRL: 478 case TEGRA210_AMX_CFG_RAM_DATA: 479 return true; 480 default: 481 break; 482 } 483 484 return false; 485 } 486 487 static const struct regmap_config tegra210_amx_regmap_config = { 488 .reg_bits = 32, 489 .reg_stride = 4, 490 .val_bits = 32, 491 .max_register = TEGRA210_AMX_CFG_RAM_DATA, 492 .writeable_reg = tegra210_amx_wr_reg, 493 .readable_reg = tegra210_amx_rd_reg, 494 .volatile_reg = tegra210_amx_volatile_reg, 495 .reg_defaults = tegra210_amx_reg_defaults, 496 .num_reg_defaults = ARRAY_SIZE(tegra210_amx_reg_defaults), 497 .cache_type = REGCACHE_FLAT, 498 }; 499 500 static const struct regmap_config tegra194_amx_regmap_config = { 501 .reg_bits = 32, 502 .reg_stride = 4, 503 .val_bits = 32, 504 .max_register = TEGRA194_AMX_RX4_LAST_FRAME_PERIOD, 505 .writeable_reg = tegra194_amx_wr_reg, 506 .readable_reg = tegra194_amx_rd_reg, 507 .volatile_reg = tegra210_amx_volatile_reg, 508 .reg_defaults = tegra210_amx_reg_defaults, 509 .num_reg_defaults = ARRAY_SIZE(tegra210_amx_reg_defaults), 510 .cache_type = REGCACHE_FLAT, 511 }; 512 513 static const struct tegra210_amx_soc_data soc_data_tegra210 = { 514 .regmap_conf = &tegra210_amx_regmap_config, 515 }; 516 517 static const struct tegra210_amx_soc_data soc_data_tegra194 = { 518 .regmap_conf = &tegra194_amx_regmap_config, 519 .auto_disable = true, 520 }; 521 522 static const struct of_device_id tegra210_amx_of_match[] = { 523 { .compatible = "nvidia,tegra210-amx", .data = &soc_data_tegra210 }, 524 { .compatible = "nvidia,tegra194-amx", .data = &soc_data_tegra194 }, 525 {}, 526 }; 527 MODULE_DEVICE_TABLE(of, tegra210_amx_of_match); 528 529 static int tegra210_amx_platform_probe(struct platform_device *pdev) 530 { 531 struct device *dev = &pdev->dev; 532 struct tegra210_amx *amx; 533 void __iomem *regs; 534 int err; 535 const struct of_device_id *match; 536 struct tegra210_amx_soc_data *soc_data; 537 538 match = of_match_device(tegra210_amx_of_match, dev); 539 540 soc_data = (struct tegra210_amx_soc_data *)match->data; 541 542 amx = devm_kzalloc(dev, sizeof(*amx), GFP_KERNEL); 543 if (!amx) 544 return -ENOMEM; 545 546 amx->soc_data = soc_data; 547 548 dev_set_drvdata(dev, amx); 549 550 regs = devm_platform_ioremap_resource(pdev, 0); 551 if (IS_ERR(regs)) 552 return PTR_ERR(regs); 553 554 amx->regmap = devm_regmap_init_mmio(dev, regs, 555 soc_data->regmap_conf); 556 if (IS_ERR(amx->regmap)) { 557 dev_err(dev, "regmap init failed\n"); 558 return PTR_ERR(amx->regmap); 559 } 560 561 regcache_cache_only(amx->regmap, true); 562 563 err = devm_snd_soc_register_component(dev, &tegra210_amx_cmpnt, 564 tegra210_amx_dais, 565 ARRAY_SIZE(tegra210_amx_dais)); 566 if (err) { 567 dev_err(dev, "can't register AMX component, err: %d\n", err); 568 return err; 569 } 570 571 pm_runtime_enable(dev); 572 573 return 0; 574 } 575 576 static void tegra210_amx_platform_remove(struct platform_device *pdev) 577 { 578 pm_runtime_disable(&pdev->dev); 579 } 580 581 static const struct dev_pm_ops tegra210_amx_pm_ops = { 582 SET_RUNTIME_PM_OPS(tegra210_amx_runtime_suspend, 583 tegra210_amx_runtime_resume, NULL) 584 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 585 pm_runtime_force_resume) 586 }; 587 588 static struct platform_driver tegra210_amx_driver = { 589 .driver = { 590 .name = "tegra210-amx", 591 .of_match_table = tegra210_amx_of_match, 592 .pm = &tegra210_amx_pm_ops, 593 }, 594 .probe = tegra210_amx_platform_probe, 595 .remove_new = tegra210_amx_platform_remove, 596 }; 597 module_platform_driver(tegra210_amx_driver); 598 599 MODULE_AUTHOR("Songhee Baek <sbaek@nvidia.com>"); 600 MODULE_DESCRIPTION("Tegra210 AMX ASoC driver"); 601 MODULE_LICENSE("GPL v2"); 602