1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> 4 */ 5 6 #include <linux/init.h> 7 #include <linux/io.h> 8 #include <linux/of.h> 9 #include <linux/of_device.h> 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/slab.h> 14 15 #include <linux/clk.h> 16 #include <linux/delay.h> 17 18 #include <linux/dma-mapping.h> 19 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/pcm_params.h> 23 #include <sound/soc.h> 24 #include <sound/initval.h> 25 #include <sound/dmaengine_pcm.h> 26 27 #include "jz4740-i2s.h" 28 29 #define JZ_REG_AIC_CONF 0x00 30 #define JZ_REG_AIC_CTRL 0x04 31 #define JZ_REG_AIC_I2S_FMT 0x10 32 #define JZ_REG_AIC_FIFO_STATUS 0x14 33 #define JZ_REG_AIC_I2S_STATUS 0x1c 34 #define JZ_REG_AIC_CLK_DIV 0x30 35 #define JZ_REG_AIC_FIFO 0x34 36 37 #define JZ_AIC_CONF_FIFO_RX_THRESHOLD_MASK (0xf << 12) 38 #define JZ_AIC_CONF_FIFO_TX_THRESHOLD_MASK (0xf << 8) 39 #define JZ_AIC_CONF_OVERFLOW_PLAY_LAST BIT(6) 40 #define JZ_AIC_CONF_INTERNAL_CODEC BIT(5) 41 #define JZ_AIC_CONF_I2S BIT(4) 42 #define JZ_AIC_CONF_RESET BIT(3) 43 #define JZ_AIC_CONF_BIT_CLK_MASTER BIT(2) 44 #define JZ_AIC_CONF_SYNC_CLK_MASTER BIT(1) 45 #define JZ_AIC_CONF_ENABLE BIT(0) 46 47 #define JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET 12 48 #define JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET 8 49 #define JZ4760_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET 24 50 #define JZ4760_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET 16 51 52 #define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK (0x7 << 19) 53 #define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK (0x7 << 16) 54 #define JZ_AIC_CTRL_ENABLE_RX_DMA BIT(15) 55 #define JZ_AIC_CTRL_ENABLE_TX_DMA BIT(14) 56 #define JZ_AIC_CTRL_MONO_TO_STEREO BIT(11) 57 #define JZ_AIC_CTRL_SWITCH_ENDIANNESS BIT(10) 58 #define JZ_AIC_CTRL_SIGNED_TO_UNSIGNED BIT(9) 59 #define JZ_AIC_CTRL_FLUSH BIT(8) 60 #define JZ_AIC_CTRL_ENABLE_ROR_INT BIT(6) 61 #define JZ_AIC_CTRL_ENABLE_TUR_INT BIT(5) 62 #define JZ_AIC_CTRL_ENABLE_RFS_INT BIT(4) 63 #define JZ_AIC_CTRL_ENABLE_TFS_INT BIT(3) 64 #define JZ_AIC_CTRL_ENABLE_LOOPBACK BIT(2) 65 #define JZ_AIC_CTRL_ENABLE_PLAYBACK BIT(1) 66 #define JZ_AIC_CTRL_ENABLE_CAPTURE BIT(0) 67 68 #define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET 19 69 #define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET 16 70 71 #define JZ_AIC_I2S_FMT_DISABLE_BIT_CLK BIT(12) 72 #define JZ_AIC_I2S_FMT_DISABLE_BIT_ICLK BIT(13) 73 #define JZ_AIC_I2S_FMT_ENABLE_SYS_CLK BIT(4) 74 #define JZ_AIC_I2S_FMT_MSB BIT(0) 75 76 #define JZ_AIC_I2S_STATUS_BUSY BIT(2) 77 78 #define JZ_AIC_CLK_DIV_MASK 0xf 79 #define I2SDIV_DV_SHIFT 0 80 #define I2SDIV_DV_MASK (0xf << I2SDIV_DV_SHIFT) 81 #define I2SDIV_IDV_SHIFT 8 82 #define I2SDIV_IDV_MASK (0xf << I2SDIV_IDV_SHIFT) 83 84 enum jz47xx_i2s_version { 85 JZ_I2S_JZ4740, 86 JZ_I2S_JZ4760, 87 JZ_I2S_JZ4770, 88 JZ_I2S_JZ4780, 89 }; 90 91 struct i2s_soc_info { 92 enum jz47xx_i2s_version version; 93 struct snd_soc_dai_driver *dai; 94 }; 95 96 struct jz4740_i2s { 97 struct resource *mem; 98 void __iomem *base; 99 dma_addr_t phys_base; 100 101 struct clk *clk_aic; 102 struct clk *clk_i2s; 103 104 struct snd_dmaengine_dai_dma_data playback_dma_data; 105 struct snd_dmaengine_dai_dma_data capture_dma_data; 106 107 const struct i2s_soc_info *soc_info; 108 }; 109 110 static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s, 111 unsigned int reg) 112 { 113 return readl(i2s->base + reg); 114 } 115 116 static inline void jz4740_i2s_write(const struct jz4740_i2s *i2s, 117 unsigned int reg, uint32_t value) 118 { 119 writel(value, i2s->base + reg); 120 } 121 122 static int jz4740_i2s_startup(struct snd_pcm_substream *substream, 123 struct snd_soc_dai *dai) 124 { 125 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 126 uint32_t conf, ctrl; 127 int ret; 128 129 if (snd_soc_dai_active(dai)) 130 return 0; 131 132 ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL); 133 ctrl |= JZ_AIC_CTRL_FLUSH; 134 jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl); 135 136 ret = clk_prepare_enable(i2s->clk_i2s); 137 if (ret) 138 return ret; 139 140 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); 141 conf |= JZ_AIC_CONF_ENABLE; 142 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 143 144 return 0; 145 } 146 147 static void jz4740_i2s_shutdown(struct snd_pcm_substream *substream, 148 struct snd_soc_dai *dai) 149 { 150 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 151 uint32_t conf; 152 153 if (snd_soc_dai_active(dai)) 154 return; 155 156 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); 157 conf &= ~JZ_AIC_CONF_ENABLE; 158 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 159 160 clk_disable_unprepare(i2s->clk_i2s); 161 } 162 163 static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd, 164 struct snd_soc_dai *dai) 165 { 166 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 167 168 uint32_t ctrl; 169 uint32_t mask; 170 171 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 172 mask = JZ_AIC_CTRL_ENABLE_PLAYBACK | JZ_AIC_CTRL_ENABLE_TX_DMA; 173 else 174 mask = JZ_AIC_CTRL_ENABLE_CAPTURE | JZ_AIC_CTRL_ENABLE_RX_DMA; 175 176 ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL); 177 178 switch (cmd) { 179 case SNDRV_PCM_TRIGGER_START: 180 case SNDRV_PCM_TRIGGER_RESUME: 181 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 182 ctrl |= mask; 183 break; 184 case SNDRV_PCM_TRIGGER_STOP: 185 case SNDRV_PCM_TRIGGER_SUSPEND: 186 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 187 ctrl &= ~mask; 188 break; 189 default: 190 return -EINVAL; 191 } 192 193 jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl); 194 195 return 0; 196 } 197 198 static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 199 { 200 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 201 202 uint32_t format = 0; 203 uint32_t conf; 204 205 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); 206 207 conf &= ~(JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER); 208 209 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 210 case SND_SOC_DAIFMT_CBS_CFS: 211 conf |= JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER; 212 format |= JZ_AIC_I2S_FMT_ENABLE_SYS_CLK; 213 break; 214 case SND_SOC_DAIFMT_CBM_CFS: 215 conf |= JZ_AIC_CONF_SYNC_CLK_MASTER; 216 break; 217 case SND_SOC_DAIFMT_CBS_CFM: 218 conf |= JZ_AIC_CONF_BIT_CLK_MASTER; 219 break; 220 case SND_SOC_DAIFMT_CBM_CFM: 221 break; 222 default: 223 return -EINVAL; 224 } 225 226 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 227 case SND_SOC_DAIFMT_MSB: 228 format |= JZ_AIC_I2S_FMT_MSB; 229 break; 230 case SND_SOC_DAIFMT_I2S: 231 break; 232 default: 233 return -EINVAL; 234 } 235 236 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 237 case SND_SOC_DAIFMT_NB_NF: 238 break; 239 default: 240 return -EINVAL; 241 } 242 243 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 244 jz4740_i2s_write(i2s, JZ_REG_AIC_I2S_FMT, format); 245 246 return 0; 247 } 248 249 static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream, 250 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 251 { 252 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 253 unsigned int sample_size; 254 uint32_t ctrl, div_reg; 255 int div; 256 257 ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL); 258 259 div_reg = jz4740_i2s_read(i2s, JZ_REG_AIC_CLK_DIV); 260 div = clk_get_rate(i2s->clk_i2s) / (64 * params_rate(params)); 261 262 switch (params_format(params)) { 263 case SNDRV_PCM_FORMAT_S8: 264 sample_size = 0; 265 break; 266 case SNDRV_PCM_FORMAT_S16: 267 sample_size = 1; 268 break; 269 default: 270 return -EINVAL; 271 } 272 273 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 274 ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK; 275 ctrl |= sample_size << JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET; 276 if (params_channels(params) == 1) 277 ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO; 278 else 279 ctrl &= ~JZ_AIC_CTRL_MONO_TO_STEREO; 280 281 div_reg &= ~I2SDIV_DV_MASK; 282 div_reg |= (div - 1) << I2SDIV_DV_SHIFT; 283 } else { 284 ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK; 285 ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET; 286 287 if (i2s->soc_info->version >= JZ_I2S_JZ4770) { 288 div_reg &= ~I2SDIV_IDV_MASK; 289 div_reg |= (div - 1) << I2SDIV_IDV_SHIFT; 290 } else { 291 div_reg &= ~I2SDIV_DV_MASK; 292 div_reg |= (div - 1) << I2SDIV_DV_SHIFT; 293 } 294 } 295 296 jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl); 297 jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div_reg); 298 299 return 0; 300 } 301 302 static int jz4740_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, 303 unsigned int freq, int dir) 304 { 305 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 306 struct clk *parent; 307 int ret = 0; 308 309 switch (clk_id) { 310 case JZ4740_I2S_CLKSRC_EXT: 311 parent = clk_get(NULL, "ext"); 312 if (IS_ERR(parent)) 313 return PTR_ERR(parent); 314 clk_set_parent(i2s->clk_i2s, parent); 315 break; 316 case JZ4740_I2S_CLKSRC_PLL: 317 parent = clk_get(NULL, "pll half"); 318 if (IS_ERR(parent)) 319 return PTR_ERR(parent); 320 clk_set_parent(i2s->clk_i2s, parent); 321 ret = clk_set_rate(i2s->clk_i2s, freq); 322 break; 323 default: 324 return -EINVAL; 325 } 326 clk_put(parent); 327 328 return ret; 329 } 330 331 static int jz4740_i2s_suspend(struct snd_soc_component *component) 332 { 333 struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component); 334 uint32_t conf; 335 336 if (snd_soc_component_active(component)) { 337 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); 338 conf &= ~JZ_AIC_CONF_ENABLE; 339 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 340 341 clk_disable_unprepare(i2s->clk_i2s); 342 } 343 344 clk_disable_unprepare(i2s->clk_aic); 345 346 return 0; 347 } 348 349 static int jz4740_i2s_resume(struct snd_soc_component *component) 350 { 351 struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component); 352 uint32_t conf; 353 int ret; 354 355 ret = clk_prepare_enable(i2s->clk_aic); 356 if (ret) 357 return ret; 358 359 if (snd_soc_component_active(component)) { 360 ret = clk_prepare_enable(i2s->clk_i2s); 361 if (ret) { 362 clk_disable_unprepare(i2s->clk_aic); 363 return ret; 364 } 365 366 conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); 367 conf |= JZ_AIC_CONF_ENABLE; 368 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 369 } 370 371 return 0; 372 } 373 374 static void jz4740_i2c_init_pcm_config(struct jz4740_i2s *i2s) 375 { 376 struct snd_dmaengine_dai_dma_data *dma_data; 377 378 /* Playback */ 379 dma_data = &i2s->playback_dma_data; 380 dma_data->maxburst = 16; 381 dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO; 382 383 /* Capture */ 384 dma_data = &i2s->capture_dma_data; 385 dma_data->maxburst = 16; 386 dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO; 387 } 388 389 static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai) 390 { 391 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 392 uint32_t conf; 393 int ret; 394 395 ret = clk_prepare_enable(i2s->clk_aic); 396 if (ret) 397 return ret; 398 399 jz4740_i2c_init_pcm_config(i2s); 400 snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, 401 &i2s->capture_dma_data); 402 403 if (i2s->soc_info->version >= JZ_I2S_JZ4760) { 404 conf = (7 << JZ4760_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) | 405 (8 << JZ4760_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) | 406 JZ_AIC_CONF_OVERFLOW_PLAY_LAST | 407 JZ_AIC_CONF_I2S | 408 JZ_AIC_CONF_INTERNAL_CODEC; 409 } else { 410 conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) | 411 (8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) | 412 JZ_AIC_CONF_OVERFLOW_PLAY_LAST | 413 JZ_AIC_CONF_I2S | 414 JZ_AIC_CONF_INTERNAL_CODEC; 415 } 416 417 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET); 418 jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf); 419 420 return 0; 421 } 422 423 static int jz4740_i2s_dai_remove(struct snd_soc_dai *dai) 424 { 425 struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); 426 427 clk_disable_unprepare(i2s->clk_aic); 428 return 0; 429 } 430 431 static const struct snd_soc_dai_ops jz4740_i2s_dai_ops = { 432 .startup = jz4740_i2s_startup, 433 .shutdown = jz4740_i2s_shutdown, 434 .trigger = jz4740_i2s_trigger, 435 .hw_params = jz4740_i2s_hw_params, 436 .set_fmt = jz4740_i2s_set_fmt, 437 .set_sysclk = jz4740_i2s_set_sysclk, 438 }; 439 440 #define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ 441 SNDRV_PCM_FMTBIT_S16_LE) 442 443 static struct snd_soc_dai_driver jz4740_i2s_dai = { 444 .probe = jz4740_i2s_dai_probe, 445 .remove = jz4740_i2s_dai_remove, 446 .playback = { 447 .channels_min = 1, 448 .channels_max = 2, 449 .rates = SNDRV_PCM_RATE_8000_48000, 450 .formats = JZ4740_I2S_FMTS, 451 }, 452 .capture = { 453 .channels_min = 2, 454 .channels_max = 2, 455 .rates = SNDRV_PCM_RATE_8000_48000, 456 .formats = JZ4740_I2S_FMTS, 457 }, 458 .symmetric_rates = 1, 459 .ops = &jz4740_i2s_dai_ops, 460 }; 461 462 static const struct i2s_soc_info jz4740_i2s_soc_info = { 463 .version = JZ_I2S_JZ4740, 464 .dai = &jz4740_i2s_dai, 465 }; 466 467 static const struct i2s_soc_info jz4760_i2s_soc_info = { 468 .version = JZ_I2S_JZ4760, 469 .dai = &jz4740_i2s_dai, 470 }; 471 472 static struct snd_soc_dai_driver jz4770_i2s_dai = { 473 .probe = jz4740_i2s_dai_probe, 474 .remove = jz4740_i2s_dai_remove, 475 .playback = { 476 .channels_min = 1, 477 .channels_max = 2, 478 .rates = SNDRV_PCM_RATE_8000_48000, 479 .formats = JZ4740_I2S_FMTS, 480 }, 481 .capture = { 482 .channels_min = 2, 483 .channels_max = 2, 484 .rates = SNDRV_PCM_RATE_8000_48000, 485 .formats = JZ4740_I2S_FMTS, 486 }, 487 .ops = &jz4740_i2s_dai_ops, 488 }; 489 490 static const struct i2s_soc_info jz4770_i2s_soc_info = { 491 .version = JZ_I2S_JZ4770, 492 .dai = &jz4770_i2s_dai, 493 }; 494 495 static const struct i2s_soc_info jz4780_i2s_soc_info = { 496 .version = JZ_I2S_JZ4780, 497 .dai = &jz4770_i2s_dai, 498 }; 499 500 static const struct snd_soc_component_driver jz4740_i2s_component = { 501 .name = "jz4740-i2s", 502 .suspend = jz4740_i2s_suspend, 503 .resume = jz4740_i2s_resume, 504 }; 505 506 static const struct of_device_id jz4740_of_matches[] = { 507 { .compatible = "ingenic,jz4740-i2s", .data = &jz4740_i2s_soc_info }, 508 { .compatible = "ingenic,jz4760-i2s", .data = &jz4760_i2s_soc_info }, 509 { .compatible = "ingenic,jz4770-i2s", .data = &jz4770_i2s_soc_info }, 510 { .compatible = "ingenic,jz4780-i2s", .data = &jz4780_i2s_soc_info }, 511 { /* sentinel */ } 512 }; 513 MODULE_DEVICE_TABLE(of, jz4740_of_matches); 514 515 static int jz4740_i2s_dev_probe(struct platform_device *pdev) 516 { 517 struct device *dev = &pdev->dev; 518 struct jz4740_i2s *i2s; 519 struct resource *mem; 520 int ret; 521 522 i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); 523 if (!i2s) 524 return -ENOMEM; 525 526 i2s->soc_info = device_get_match_data(dev); 527 528 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 529 i2s->base = devm_ioremap_resource(dev, mem); 530 if (IS_ERR(i2s->base)) 531 return PTR_ERR(i2s->base); 532 533 i2s->phys_base = mem->start; 534 535 i2s->clk_aic = devm_clk_get(dev, "aic"); 536 if (IS_ERR(i2s->clk_aic)) 537 return PTR_ERR(i2s->clk_aic); 538 539 i2s->clk_i2s = devm_clk_get(dev, "i2s"); 540 if (IS_ERR(i2s->clk_i2s)) 541 return PTR_ERR(i2s->clk_i2s); 542 543 platform_set_drvdata(pdev, i2s); 544 545 ret = devm_snd_soc_register_component(dev, &jz4740_i2s_component, 546 i2s->soc_info->dai, 1); 547 if (ret) 548 return ret; 549 550 return devm_snd_dmaengine_pcm_register(dev, NULL, 551 SND_DMAENGINE_PCM_FLAG_COMPAT); 552 } 553 554 static struct platform_driver jz4740_i2s_driver = { 555 .probe = jz4740_i2s_dev_probe, 556 .driver = { 557 .name = "jz4740-i2s", 558 .of_match_table = jz4740_of_matches, 559 }, 560 }; 561 562 module_platform_driver(jz4740_i2s_driver); 563 564 MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>"); 565 MODULE_DESCRIPTION("Ingenic JZ4740 SoC I2S driver"); 566 MODULE_LICENSE("GPL"); 567 MODULE_ALIAS("platform:jz4740-i2s"); 568