1 /* sound/soc/samsung/i2s.c 2 * 3 * ALSA SoC Audio Layer - Samsung I2S Controller driver 4 * 5 * Copyright (c) 2010 Samsung Electronics Co. Ltd. 6 * Jaswinder Singh <jassisinghbrar@gmail.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/delay.h> 14 #include <linux/slab.h> 15 #include <linux/clk.h> 16 #include <linux/io.h> 17 #include <linux/module.h> 18 #include <linux/of.h> 19 #include <linux/of_gpio.h> 20 #include <linux/pm_runtime.h> 21 22 #include <sound/soc.h> 23 #include <sound/pcm_params.h> 24 25 #include <mach/dma.h> 26 27 #include <linux/platform_data/asoc-s3c.h> 28 29 #include "dma.h" 30 #include "idma.h" 31 #include "i2s.h" 32 #include "i2s-regs.h" 33 34 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) 35 36 enum samsung_dai_type { 37 TYPE_PRI, 38 TYPE_SEC, 39 }; 40 41 struct samsung_i2s_dai_data { 42 int dai_type; 43 }; 44 45 struct i2s_dai { 46 /* Platform device for this DAI */ 47 struct platform_device *pdev; 48 /* IOREMAP'd SFRs */ 49 void __iomem *addr; 50 /* Physical base address of SFRs */ 51 u32 base; 52 /* Rate of RCLK source clock */ 53 unsigned long rclk_srcrate; 54 /* Frame Clock */ 55 unsigned frmclk; 56 /* 57 * Specifically requested RCLK,BCLK by MACHINE Driver. 58 * 0 indicates CPU driver is free to choose any value. 59 */ 60 unsigned rfs, bfs; 61 /* I2S Controller's core clock */ 62 struct clk *clk; 63 /* Clock for generating I2S signals */ 64 struct clk *op_clk; 65 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ 66 struct i2s_dai *pri_dai; 67 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ 68 struct i2s_dai *sec_dai; 69 #define DAI_OPENED (1 << 0) /* Dai is opened */ 70 #define DAI_MANAGER (1 << 1) /* Dai is the manager */ 71 unsigned mode; 72 /* Driver for this DAI */ 73 struct snd_soc_dai_driver i2s_dai_drv; 74 /* DMA parameters */ 75 struct s3c_dma_params dma_playback; 76 struct s3c_dma_params dma_capture; 77 struct s3c_dma_params idma_playback; 78 u32 quirks; 79 u32 suspend_i2smod; 80 u32 suspend_i2scon; 81 u32 suspend_i2spsr; 82 unsigned long gpios[7]; /* i2s gpio line numbers */ 83 }; 84 85 /* Lock for cross i/f checks */ 86 static DEFINE_SPINLOCK(lock); 87 88 /* If this is the 'overlay' stereo DAI */ 89 static inline bool is_secondary(struct i2s_dai *i2s) 90 { 91 return i2s->pri_dai ? true : false; 92 } 93 94 /* If operating in SoC-Slave mode */ 95 static inline bool is_slave(struct i2s_dai *i2s) 96 { 97 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; 98 } 99 100 /* If this interface of the controller is transmitting data */ 101 static inline bool tx_active(struct i2s_dai *i2s) 102 { 103 u32 active; 104 105 if (!i2s) 106 return false; 107 108 active = readl(i2s->addr + I2SCON); 109 110 if (is_secondary(i2s)) 111 active &= CON_TXSDMA_ACTIVE; 112 else 113 active &= CON_TXDMA_ACTIVE; 114 115 return active ? true : false; 116 } 117 118 /* If the other interface of the controller is transmitting data */ 119 static inline bool other_tx_active(struct i2s_dai *i2s) 120 { 121 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 122 123 return tx_active(other); 124 } 125 126 /* If any interface of the controller is transmitting data */ 127 static inline bool any_tx_active(struct i2s_dai *i2s) 128 { 129 return tx_active(i2s) || other_tx_active(i2s); 130 } 131 132 /* If this interface of the controller is receiving data */ 133 static inline bool rx_active(struct i2s_dai *i2s) 134 { 135 u32 active; 136 137 if (!i2s) 138 return false; 139 140 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE; 141 142 return active ? true : false; 143 } 144 145 /* If the other interface of the controller is receiving data */ 146 static inline bool other_rx_active(struct i2s_dai *i2s) 147 { 148 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 149 150 return rx_active(other); 151 } 152 153 /* If any interface of the controller is receiving data */ 154 static inline bool any_rx_active(struct i2s_dai *i2s) 155 { 156 return rx_active(i2s) || other_rx_active(i2s); 157 } 158 159 /* If the other DAI is transmitting or receiving data */ 160 static inline bool other_active(struct i2s_dai *i2s) 161 { 162 return other_rx_active(i2s) || other_tx_active(i2s); 163 } 164 165 /* If this DAI is transmitting or receiving data */ 166 static inline bool this_active(struct i2s_dai *i2s) 167 { 168 return tx_active(i2s) || rx_active(i2s); 169 } 170 171 /* If the controller is active anyway */ 172 static inline bool any_active(struct i2s_dai *i2s) 173 { 174 return this_active(i2s) || other_active(i2s); 175 } 176 177 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) 178 { 179 return snd_soc_dai_get_drvdata(dai); 180 } 181 182 static inline bool is_opened(struct i2s_dai *i2s) 183 { 184 if (i2s && (i2s->mode & DAI_OPENED)) 185 return true; 186 else 187 return false; 188 } 189 190 static inline bool is_manager(struct i2s_dai *i2s) 191 { 192 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) 193 return true; 194 else 195 return false; 196 } 197 198 /* Read RCLK of I2S (in multiples of LRCLK) */ 199 static inline unsigned get_rfs(struct i2s_dai *i2s) 200 { 201 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3; 202 203 switch (rfs) { 204 case 3: return 768; 205 case 2: return 384; 206 case 1: return 512; 207 default: return 256; 208 } 209 } 210 211 /* Write RCLK of I2S (in multiples of LRCLK) */ 212 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) 213 { 214 u32 mod = readl(i2s->addr + I2SMOD); 215 216 mod &= ~MOD_RCLK_MASK; 217 218 switch (rfs) { 219 case 768: 220 mod |= MOD_RCLK_768FS; 221 break; 222 case 512: 223 mod |= MOD_RCLK_512FS; 224 break; 225 case 384: 226 mod |= MOD_RCLK_384FS; 227 break; 228 default: 229 mod |= MOD_RCLK_256FS; 230 break; 231 } 232 233 writel(mod, i2s->addr + I2SMOD); 234 } 235 236 /* Read Bit-Clock of I2S (in multiples of LRCLK) */ 237 static inline unsigned get_bfs(struct i2s_dai *i2s) 238 { 239 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3; 240 241 switch (bfs) { 242 case 3: return 24; 243 case 2: return 16; 244 case 1: return 48; 245 default: return 32; 246 } 247 } 248 249 /* Write Bit-Clock of I2S (in multiples of LRCLK) */ 250 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) 251 { 252 u32 mod = readl(i2s->addr + I2SMOD); 253 254 mod &= ~MOD_BCLK_MASK; 255 256 switch (bfs) { 257 case 48: 258 mod |= MOD_BCLK_48FS; 259 break; 260 case 32: 261 mod |= MOD_BCLK_32FS; 262 break; 263 case 24: 264 mod |= MOD_BCLK_24FS; 265 break; 266 case 16: 267 mod |= MOD_BCLK_16FS; 268 break; 269 default: 270 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); 271 return; 272 } 273 274 writel(mod, i2s->addr + I2SMOD); 275 } 276 277 /* Sample-Size */ 278 static inline int get_blc(struct i2s_dai *i2s) 279 { 280 int blc = readl(i2s->addr + I2SMOD); 281 282 blc = (blc >> 13) & 0x3; 283 284 switch (blc) { 285 case 2: return 24; 286 case 1: return 8; 287 default: return 16; 288 } 289 } 290 291 /* TX Channel Control */ 292 static void i2s_txctrl(struct i2s_dai *i2s, int on) 293 { 294 void __iomem *addr = i2s->addr; 295 u32 con = readl(addr + I2SCON); 296 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 297 298 if (on) { 299 con |= CON_ACTIVE; 300 con &= ~CON_TXCH_PAUSE; 301 302 if (is_secondary(i2s)) { 303 con |= CON_TXSDMA_ACTIVE; 304 con &= ~CON_TXSDMA_PAUSE; 305 } else { 306 con |= CON_TXDMA_ACTIVE; 307 con &= ~CON_TXDMA_PAUSE; 308 } 309 310 if (any_rx_active(i2s)) 311 mod |= MOD_TXRX; 312 else 313 mod |= MOD_TXONLY; 314 } else { 315 if (is_secondary(i2s)) { 316 con |= CON_TXSDMA_PAUSE; 317 con &= ~CON_TXSDMA_ACTIVE; 318 } else { 319 con |= CON_TXDMA_PAUSE; 320 con &= ~CON_TXDMA_ACTIVE; 321 } 322 323 if (other_tx_active(i2s)) { 324 writel(con, addr + I2SCON); 325 return; 326 } 327 328 con |= CON_TXCH_PAUSE; 329 330 if (any_rx_active(i2s)) 331 mod |= MOD_RXONLY; 332 else 333 con &= ~CON_ACTIVE; 334 } 335 336 writel(mod, addr + I2SMOD); 337 writel(con, addr + I2SCON); 338 } 339 340 /* RX Channel Control */ 341 static void i2s_rxctrl(struct i2s_dai *i2s, int on) 342 { 343 void __iomem *addr = i2s->addr; 344 u32 con = readl(addr + I2SCON); 345 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 346 347 if (on) { 348 con |= CON_RXDMA_ACTIVE | CON_ACTIVE; 349 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); 350 351 if (any_tx_active(i2s)) 352 mod |= MOD_TXRX; 353 else 354 mod |= MOD_RXONLY; 355 } else { 356 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; 357 con &= ~CON_RXDMA_ACTIVE; 358 359 if (any_tx_active(i2s)) 360 mod |= MOD_TXONLY; 361 else 362 con &= ~CON_ACTIVE; 363 } 364 365 writel(mod, addr + I2SMOD); 366 writel(con, addr + I2SCON); 367 } 368 369 /* Flush FIFO of an interface */ 370 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) 371 { 372 void __iomem *fic; 373 u32 val; 374 375 if (!i2s) 376 return; 377 378 if (is_secondary(i2s)) 379 fic = i2s->addr + I2SFICS; 380 else 381 fic = i2s->addr + I2SFIC; 382 383 /* Flush the FIFO */ 384 writel(readl(fic) | flush, fic); 385 386 /* Be patient */ 387 val = msecs_to_loops(1) / 1000; /* 1 usec */ 388 while (--val) 389 cpu_relax(); 390 391 writel(readl(fic) & ~flush, fic); 392 } 393 394 static int i2s_set_sysclk(struct snd_soc_dai *dai, 395 int clk_id, unsigned int rfs, int dir) 396 { 397 struct i2s_dai *i2s = to_info(dai); 398 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 399 u32 mod = readl(i2s->addr + I2SMOD); 400 401 switch (clk_id) { 402 case SAMSUNG_I2S_CDCLK: 403 /* Shouldn't matter in GATING(CLOCK_IN) mode */ 404 if (dir == SND_SOC_CLOCK_IN) 405 rfs = 0; 406 407 if ((rfs && other->rfs && (other->rfs != rfs)) || 408 (any_active(i2s) && 409 (((dir == SND_SOC_CLOCK_IN) 410 && !(mod & MOD_CDCLKCON)) || 411 ((dir == SND_SOC_CLOCK_OUT) 412 && (mod & MOD_CDCLKCON))))) { 413 dev_err(&i2s->pdev->dev, 414 "%s:%d Other DAI busy\n", __func__, __LINE__); 415 return -EAGAIN; 416 } 417 418 if (dir == SND_SOC_CLOCK_IN) 419 mod |= MOD_CDCLKCON; 420 else 421 mod &= ~MOD_CDCLKCON; 422 423 i2s->rfs = rfs; 424 break; 425 426 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ 427 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ 428 if ((i2s->quirks & QUIRK_NO_MUXPSR) 429 || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) 430 clk_id = 0; 431 else 432 clk_id = 1; 433 434 if (!any_active(i2s)) { 435 if (i2s->op_clk) { 436 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || 437 (!clk_id && (mod & MOD_IMS_SYSMUX))) { 438 clk_disable_unprepare(i2s->op_clk); 439 clk_put(i2s->op_clk); 440 } else { 441 i2s->rclk_srcrate = 442 clk_get_rate(i2s->op_clk); 443 return 0; 444 } 445 } 446 447 if (clk_id) 448 i2s->op_clk = clk_get(&i2s->pdev->dev, 449 "i2s_opclk1"); 450 else 451 i2s->op_clk = clk_get(&i2s->pdev->dev, 452 "i2s_opclk0"); 453 clk_prepare_enable(i2s->op_clk); 454 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); 455 456 /* Over-ride the other's */ 457 if (other) { 458 other->op_clk = i2s->op_clk; 459 other->rclk_srcrate = i2s->rclk_srcrate; 460 } 461 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) 462 || (clk_id && !(mod & MOD_IMS_SYSMUX))) { 463 dev_err(&i2s->pdev->dev, 464 "%s:%d Other DAI busy\n", __func__, __LINE__); 465 return -EAGAIN; 466 } else { 467 /* Call can't be on the active DAI */ 468 i2s->op_clk = other->op_clk; 469 i2s->rclk_srcrate = other->rclk_srcrate; 470 return 0; 471 } 472 473 if (clk_id == 0) 474 mod &= ~MOD_IMS_SYSMUX; 475 else 476 mod |= MOD_IMS_SYSMUX; 477 break; 478 479 default: 480 dev_err(&i2s->pdev->dev, "We don't serve that!\n"); 481 return -EINVAL; 482 } 483 484 writel(mod, i2s->addr + I2SMOD); 485 486 return 0; 487 } 488 489 static int i2s_set_fmt(struct snd_soc_dai *dai, 490 unsigned int fmt) 491 { 492 struct i2s_dai *i2s = to_info(dai); 493 u32 mod = readl(i2s->addr + I2SMOD); 494 u32 tmp = 0; 495 496 /* Format is priority */ 497 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 498 case SND_SOC_DAIFMT_RIGHT_J: 499 tmp |= MOD_LR_RLOW; 500 tmp |= MOD_SDF_MSB; 501 break; 502 case SND_SOC_DAIFMT_LEFT_J: 503 tmp |= MOD_LR_RLOW; 504 tmp |= MOD_SDF_LSB; 505 break; 506 case SND_SOC_DAIFMT_I2S: 507 tmp |= MOD_SDF_IIS; 508 break; 509 default: 510 dev_err(&i2s->pdev->dev, "Format not supported\n"); 511 return -EINVAL; 512 } 513 514 /* 515 * INV flag is relative to the FORMAT flag - if set it simply 516 * flips the polarity specified by the Standard 517 */ 518 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 519 case SND_SOC_DAIFMT_NB_NF: 520 break; 521 case SND_SOC_DAIFMT_NB_IF: 522 if (tmp & MOD_LR_RLOW) 523 tmp &= ~MOD_LR_RLOW; 524 else 525 tmp |= MOD_LR_RLOW; 526 break; 527 default: 528 dev_err(&i2s->pdev->dev, "Polarity not supported\n"); 529 return -EINVAL; 530 } 531 532 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 533 case SND_SOC_DAIFMT_CBM_CFM: 534 tmp |= MOD_SLAVE; 535 break; 536 case SND_SOC_DAIFMT_CBS_CFS: 537 /* Set default source clock in Master mode */ 538 if (i2s->rclk_srcrate == 0) 539 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, 540 0, SND_SOC_CLOCK_IN); 541 break; 542 default: 543 dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); 544 return -EINVAL; 545 } 546 547 if (any_active(i2s) && 548 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW 549 | MOD_SLAVE)) != tmp)) { 550 dev_err(&i2s->pdev->dev, 551 "%s:%d Other DAI busy\n", __func__, __LINE__); 552 return -EAGAIN; 553 } 554 555 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); 556 mod |= tmp; 557 writel(mod, i2s->addr + I2SMOD); 558 559 return 0; 560 } 561 562 static int i2s_hw_params(struct snd_pcm_substream *substream, 563 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 564 { 565 struct i2s_dai *i2s = to_info(dai); 566 u32 mod = readl(i2s->addr + I2SMOD); 567 568 if (!is_secondary(i2s)) 569 mod &= ~(MOD_DC2_EN | MOD_DC1_EN); 570 571 switch (params_channels(params)) { 572 case 6: 573 mod |= MOD_DC2_EN; 574 case 4: 575 mod |= MOD_DC1_EN; 576 break; 577 case 2: 578 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 579 i2s->dma_playback.dma_size = 4; 580 else 581 i2s->dma_capture.dma_size = 4; 582 break; 583 case 1: 584 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 585 i2s->dma_playback.dma_size = 2; 586 else 587 i2s->dma_capture.dma_size = 2; 588 589 break; 590 default: 591 dev_err(&i2s->pdev->dev, "%d channels not supported\n", 592 params_channels(params)); 593 return -EINVAL; 594 } 595 596 if (is_secondary(i2s)) 597 mod &= ~MOD_BLCS_MASK; 598 else 599 mod &= ~MOD_BLCP_MASK; 600 601 if (is_manager(i2s)) 602 mod &= ~MOD_BLC_MASK; 603 604 switch (params_format(params)) { 605 case SNDRV_PCM_FORMAT_S8: 606 if (is_secondary(i2s)) 607 mod |= MOD_BLCS_8BIT; 608 else 609 mod |= MOD_BLCP_8BIT; 610 if (is_manager(i2s)) 611 mod |= MOD_BLC_8BIT; 612 break; 613 case SNDRV_PCM_FORMAT_S16_LE: 614 if (is_secondary(i2s)) 615 mod |= MOD_BLCS_16BIT; 616 else 617 mod |= MOD_BLCP_16BIT; 618 if (is_manager(i2s)) 619 mod |= MOD_BLC_16BIT; 620 break; 621 case SNDRV_PCM_FORMAT_S24_LE: 622 if (is_secondary(i2s)) 623 mod |= MOD_BLCS_24BIT; 624 else 625 mod |= MOD_BLCP_24BIT; 626 if (is_manager(i2s)) 627 mod |= MOD_BLC_24BIT; 628 break; 629 default: 630 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", 631 params_format(params)); 632 return -EINVAL; 633 } 634 writel(mod, i2s->addr + I2SMOD); 635 636 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 637 snd_soc_dai_set_dma_data(dai, substream, 638 (void *)&i2s->dma_playback); 639 else 640 snd_soc_dai_set_dma_data(dai, substream, 641 (void *)&i2s->dma_capture); 642 643 i2s->frmclk = params_rate(params); 644 645 return 0; 646 } 647 648 /* We set constraints on the substream acc to the version of I2S */ 649 static int i2s_startup(struct snd_pcm_substream *substream, 650 struct snd_soc_dai *dai) 651 { 652 struct i2s_dai *i2s = to_info(dai); 653 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 654 unsigned long flags; 655 656 spin_lock_irqsave(&lock, flags); 657 658 i2s->mode |= DAI_OPENED; 659 660 if (is_manager(other)) 661 i2s->mode &= ~DAI_MANAGER; 662 else 663 i2s->mode |= DAI_MANAGER; 664 665 /* Enforce set_sysclk in Master mode */ 666 i2s->rclk_srcrate = 0; 667 668 if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR)) 669 writel(CON_RSTCLR, i2s->addr + I2SCON); 670 671 spin_unlock_irqrestore(&lock, flags); 672 673 return 0; 674 } 675 676 static void i2s_shutdown(struct snd_pcm_substream *substream, 677 struct snd_soc_dai *dai) 678 { 679 struct i2s_dai *i2s = to_info(dai); 680 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 681 unsigned long flags; 682 683 spin_lock_irqsave(&lock, flags); 684 685 i2s->mode &= ~DAI_OPENED; 686 i2s->mode &= ~DAI_MANAGER; 687 688 if (is_opened(other)) 689 other->mode |= DAI_MANAGER; 690 691 /* Reset any constraint on RFS and BFS */ 692 i2s->rfs = 0; 693 i2s->bfs = 0; 694 695 spin_unlock_irqrestore(&lock, flags); 696 697 /* Gate CDCLK by default */ 698 if (!is_opened(other)) 699 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 700 0, SND_SOC_CLOCK_IN); 701 } 702 703 static int config_setup(struct i2s_dai *i2s) 704 { 705 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 706 unsigned rfs, bfs, blc; 707 u32 psr; 708 709 blc = get_blc(i2s); 710 711 bfs = i2s->bfs; 712 713 if (!bfs && other) 714 bfs = other->bfs; 715 716 /* Select least possible multiple(2) if no constraint set */ 717 if (!bfs) 718 bfs = blc * 2; 719 720 rfs = i2s->rfs; 721 722 if (!rfs && other) 723 rfs = other->rfs; 724 725 if ((rfs == 256 || rfs == 512) && (blc == 24)) { 726 dev_err(&i2s->pdev->dev, 727 "%d-RFS not supported for 24-blc\n", rfs); 728 return -EINVAL; 729 } 730 731 if (!rfs) { 732 if (bfs == 16 || bfs == 32) 733 rfs = 256; 734 else 735 rfs = 384; 736 } 737 738 /* If already setup and running */ 739 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { 740 dev_err(&i2s->pdev->dev, 741 "%s:%d Other DAI busy\n", __func__, __LINE__); 742 return -EAGAIN; 743 } 744 745 /* Don't bother RFS, BFS & PSR in Slave mode */ 746 if (is_slave(i2s)) 747 return 0; 748 749 set_bfs(i2s, bfs); 750 set_rfs(i2s, rfs); 751 752 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { 753 psr = i2s->rclk_srcrate / i2s->frmclk / rfs; 754 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); 755 dev_dbg(&i2s->pdev->dev, 756 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", 757 i2s->rclk_srcrate, psr, rfs, bfs); 758 } 759 760 return 0; 761 } 762 763 static int i2s_trigger(struct snd_pcm_substream *substream, 764 int cmd, struct snd_soc_dai *dai) 765 { 766 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); 767 struct snd_soc_pcm_runtime *rtd = substream->private_data; 768 struct i2s_dai *i2s = to_info(rtd->cpu_dai); 769 unsigned long flags; 770 771 switch (cmd) { 772 case SNDRV_PCM_TRIGGER_START: 773 case SNDRV_PCM_TRIGGER_RESUME: 774 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 775 local_irq_save(flags); 776 777 if (config_setup(i2s)) { 778 local_irq_restore(flags); 779 return -EINVAL; 780 } 781 782 if (capture) 783 i2s_rxctrl(i2s, 1); 784 else 785 i2s_txctrl(i2s, 1); 786 787 local_irq_restore(flags); 788 break; 789 case SNDRV_PCM_TRIGGER_STOP: 790 case SNDRV_PCM_TRIGGER_SUSPEND: 791 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 792 local_irq_save(flags); 793 794 if (capture) { 795 i2s_rxctrl(i2s, 0); 796 i2s_fifo(i2s, FIC_RXFLUSH); 797 } else { 798 i2s_txctrl(i2s, 0); 799 i2s_fifo(i2s, FIC_TXFLUSH); 800 } 801 802 local_irq_restore(flags); 803 break; 804 } 805 806 return 0; 807 } 808 809 static int i2s_set_clkdiv(struct snd_soc_dai *dai, 810 int div_id, int div) 811 { 812 struct i2s_dai *i2s = to_info(dai); 813 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 814 815 switch (div_id) { 816 case SAMSUNG_I2S_DIV_BCLK: 817 if ((any_active(i2s) && div && (get_bfs(i2s) != div)) 818 || (other && other->bfs && (other->bfs != div))) { 819 dev_err(&i2s->pdev->dev, 820 "%s:%d Other DAI busy\n", __func__, __LINE__); 821 return -EAGAIN; 822 } 823 i2s->bfs = div; 824 break; 825 default: 826 dev_err(&i2s->pdev->dev, 827 "Invalid clock divider(%d)\n", div_id); 828 return -EINVAL; 829 } 830 831 return 0; 832 } 833 834 static snd_pcm_sframes_t 835 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) 836 { 837 struct i2s_dai *i2s = to_info(dai); 838 u32 reg = readl(i2s->addr + I2SFIC); 839 snd_pcm_sframes_t delay; 840 841 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 842 delay = FIC_RXCOUNT(reg); 843 else if (is_secondary(i2s)) 844 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); 845 else 846 delay = FIC_TXCOUNT(reg); 847 848 return delay; 849 } 850 851 #ifdef CONFIG_PM 852 static int i2s_suspend(struct snd_soc_dai *dai) 853 { 854 struct i2s_dai *i2s = to_info(dai); 855 856 if (dai->active) { 857 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); 858 i2s->suspend_i2scon = readl(i2s->addr + I2SCON); 859 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); 860 } 861 862 return 0; 863 } 864 865 static int i2s_resume(struct snd_soc_dai *dai) 866 { 867 struct i2s_dai *i2s = to_info(dai); 868 869 if (dai->active) { 870 writel(i2s->suspend_i2scon, i2s->addr + I2SCON); 871 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); 872 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); 873 } 874 875 return 0; 876 } 877 #else 878 #define i2s_suspend NULL 879 #define i2s_resume NULL 880 #endif 881 882 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) 883 { 884 struct i2s_dai *i2s = to_info(dai); 885 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 886 887 if (other && other->clk) /* If this is probe on secondary */ 888 goto probe_exit; 889 890 i2s->addr = ioremap(i2s->base, 0x100); 891 if (i2s->addr == NULL) { 892 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); 893 return -ENXIO; 894 } 895 896 i2s->clk = clk_get(&i2s->pdev->dev, "iis"); 897 if (IS_ERR(i2s->clk)) { 898 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); 899 iounmap(i2s->addr); 900 return -ENOENT; 901 } 902 clk_prepare_enable(i2s->clk); 903 904 if (other) { 905 other->addr = i2s->addr; 906 other->clk = i2s->clk; 907 } 908 909 if (i2s->quirks & QUIRK_NEED_RSTCLR) 910 writel(CON_RSTCLR, i2s->addr + I2SCON); 911 912 if (i2s->quirks & QUIRK_SEC_DAI) 913 idma_reg_addr_init(i2s->addr, 914 i2s->sec_dai->idma_playback.dma_addr); 915 916 probe_exit: 917 /* Reset any constraint on RFS and BFS */ 918 i2s->rfs = 0; 919 i2s->bfs = 0; 920 i2s_txctrl(i2s, 0); 921 i2s_rxctrl(i2s, 0); 922 i2s_fifo(i2s, FIC_TXFLUSH); 923 i2s_fifo(other, FIC_TXFLUSH); 924 i2s_fifo(i2s, FIC_RXFLUSH); 925 926 /* Gate CDCLK by default */ 927 if (!is_opened(other)) 928 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 929 0, SND_SOC_CLOCK_IN); 930 931 return 0; 932 } 933 934 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) 935 { 936 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); 937 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 938 939 if (!other || !other->clk) { 940 941 if (i2s->quirks & QUIRK_NEED_RSTCLR) 942 writel(0, i2s->addr + I2SCON); 943 944 clk_disable_unprepare(i2s->clk); 945 clk_put(i2s->clk); 946 947 iounmap(i2s->addr); 948 } 949 950 i2s->clk = NULL; 951 952 return 0; 953 } 954 955 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { 956 .trigger = i2s_trigger, 957 .hw_params = i2s_hw_params, 958 .set_fmt = i2s_set_fmt, 959 .set_clkdiv = i2s_set_clkdiv, 960 .set_sysclk = i2s_set_sysclk, 961 .startup = i2s_startup, 962 .shutdown = i2s_shutdown, 963 .delay = i2s_delay, 964 }; 965 966 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 967 968 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ 969 SNDRV_PCM_FMTBIT_S16_LE | \ 970 SNDRV_PCM_FMTBIT_S24_LE) 971 972 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) 973 { 974 struct i2s_dai *i2s; 975 976 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL); 977 if (i2s == NULL) 978 return NULL; 979 980 i2s->pdev = pdev; 981 i2s->pri_dai = NULL; 982 i2s->sec_dai = NULL; 983 i2s->i2s_dai_drv.symmetric_rates = 1; 984 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; 985 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; 986 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; 987 i2s->i2s_dai_drv.suspend = i2s_suspend; 988 i2s->i2s_dai_drv.resume = i2s_resume; 989 i2s->i2s_dai_drv.playback.channels_min = 2; 990 i2s->i2s_dai_drv.playback.channels_max = 2; 991 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; 992 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; 993 994 if (!sec) { 995 i2s->i2s_dai_drv.capture.channels_min = 1; 996 i2s->i2s_dai_drv.capture.channels_max = 2; 997 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; 998 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; 999 } else { /* Create a new platform_device for Secondary */ 1000 i2s->pdev = platform_device_register_resndata(NULL, 1001 "samsung-i2s-sec", -1, NULL, 0, NULL, 0); 1002 if (IS_ERR(i2s->pdev)) 1003 return NULL; 1004 } 1005 1006 /* Pre-assign snd_soc_dai_set_drvdata */ 1007 dev_set_drvdata(&i2s->pdev->dev, i2s); 1008 1009 return i2s; 1010 } 1011 1012 #ifdef CONFIG_OF 1013 static int samsung_i2s_parse_dt_gpio(struct i2s_dai *i2s) 1014 { 1015 struct device *dev = &i2s->pdev->dev; 1016 int index, gpio, ret; 1017 1018 for (index = 0; index < 7; index++) { 1019 gpio = of_get_gpio(dev->of_node, index); 1020 if (!gpio_is_valid(gpio)) { 1021 dev_err(dev, "invalid gpio[%d]: %d\n", index, gpio); 1022 goto free_gpio; 1023 } 1024 1025 ret = gpio_request(gpio, dev_name(dev)); 1026 if (ret) { 1027 dev_err(dev, "gpio [%d] request failed\n", gpio); 1028 goto free_gpio; 1029 } 1030 i2s->gpios[index] = gpio; 1031 } 1032 return 0; 1033 1034 free_gpio: 1035 while (--index >= 0) 1036 gpio_free(i2s->gpios[index]); 1037 return -EINVAL; 1038 } 1039 1040 static void samsung_i2s_dt_gpio_free(struct i2s_dai *i2s) 1041 { 1042 unsigned int index; 1043 for (index = 0; index < 7; index++) 1044 gpio_free(i2s->gpios[index]); 1045 } 1046 #else 1047 static int samsung_i2s_parse_dt_gpio(struct i2s_dai *dai) 1048 { 1049 return -EINVAL; 1050 } 1051 1052 static void samsung_i2s_dt_gpio_free(struct i2s_dai *dai) 1053 { 1054 } 1055 1056 #endif 1057 1058 static const struct of_device_id exynos_i2s_match[]; 1059 1060 static inline int samsung_i2s_get_driver_data(struct platform_device *pdev) 1061 { 1062 #ifdef CONFIG_OF 1063 struct samsung_i2s_dai_data *data; 1064 if (pdev->dev.of_node) { 1065 const struct of_device_id *match; 1066 match = of_match_node(exynos_i2s_match, pdev->dev.of_node); 1067 data = (struct samsung_i2s_dai_data *) match->data; 1068 return data->dai_type; 1069 } else 1070 #endif 1071 return platform_get_device_id(pdev)->driver_data; 1072 } 1073 1074 #ifdef CONFIG_PM_RUNTIME 1075 static int i2s_runtime_suspend(struct device *dev) 1076 { 1077 struct i2s_dai *i2s = dev_get_drvdata(dev); 1078 1079 clk_disable_unprepare(i2s->clk); 1080 1081 return 0; 1082 } 1083 1084 static int i2s_runtime_resume(struct device *dev) 1085 { 1086 struct i2s_dai *i2s = dev_get_drvdata(dev); 1087 1088 clk_prepare_enable(i2s->clk); 1089 1090 return 0; 1091 } 1092 #endif /* CONFIG_PM_RUNTIME */ 1093 1094 static int samsung_i2s_probe(struct platform_device *pdev) 1095 { 1096 struct i2s_dai *pri_dai, *sec_dai = NULL; 1097 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; 1098 struct samsung_i2s *i2s_cfg = NULL; 1099 struct resource *res; 1100 u32 regs_base, quirks = 0, idma_addr = 0; 1101 struct device_node *np = pdev->dev.of_node; 1102 enum samsung_dai_type samsung_dai_type; 1103 int ret = 0; 1104 1105 /* Call during Seconday interface registration */ 1106 samsung_dai_type = samsung_i2s_get_driver_data(pdev); 1107 1108 if (samsung_dai_type == TYPE_SEC) { 1109 sec_dai = dev_get_drvdata(&pdev->dev); 1110 snd_soc_register_dai(&sec_dai->pdev->dev, 1111 &sec_dai->i2s_dai_drv); 1112 asoc_dma_platform_register(&pdev->dev); 1113 return 0; 1114 } 1115 1116 pri_dai = i2s_alloc_dai(pdev, false); 1117 if (!pri_dai) { 1118 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); 1119 return -ENOMEM; 1120 } 1121 1122 if (!np) { 1123 res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 1124 if (!res) { 1125 dev_err(&pdev->dev, 1126 "Unable to get I2S-TX dma resource\n"); 1127 return -ENXIO; 1128 } 1129 pri_dai->dma_playback.channel = res->start; 1130 1131 res = platform_get_resource(pdev, IORESOURCE_DMA, 1); 1132 if (!res) { 1133 dev_err(&pdev->dev, 1134 "Unable to get I2S-RX dma resource\n"); 1135 return -ENXIO; 1136 } 1137 pri_dai->dma_capture.channel = res->start; 1138 1139 if (i2s_pdata == NULL) { 1140 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); 1141 return -EINVAL; 1142 } 1143 1144 if (&i2s_pdata->type) 1145 i2s_cfg = &i2s_pdata->type.i2s; 1146 1147 if (i2s_cfg) { 1148 quirks = i2s_cfg->quirks; 1149 idma_addr = i2s_cfg->idma_addr; 1150 } 1151 } else { 1152 if (of_find_property(np, "samsung,supports-6ch", NULL)) 1153 quirks |= QUIRK_PRI_6CHAN; 1154 1155 if (of_find_property(np, "samsung,supports-secdai", NULL)) 1156 quirks |= QUIRK_SEC_DAI; 1157 1158 if (of_find_property(np, "samsung,supports-rstclr", NULL)) 1159 quirks |= QUIRK_NEED_RSTCLR; 1160 1161 if (of_property_read_u32(np, "samsung,idma-addr", 1162 &idma_addr)) { 1163 if (quirks & QUIRK_SEC_DAI) { 1164 dev_err(&pdev->dev, "idma address is not"\ 1165 "specified"); 1166 return -EINVAL; 1167 } 1168 } 1169 } 1170 1171 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1172 if (!res) { 1173 dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); 1174 return -ENXIO; 1175 } 1176 1177 if (!request_mem_region(res->start, resource_size(res), 1178 "samsung-i2s")) { 1179 dev_err(&pdev->dev, "Unable to request SFR region\n"); 1180 return -EBUSY; 1181 } 1182 regs_base = res->start; 1183 1184 pri_dai->dma_playback.dma_addr = regs_base + I2STXD; 1185 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; 1186 pri_dai->dma_playback.client = 1187 (struct s3c2410_dma_client *)&pri_dai->dma_playback; 1188 pri_dai->dma_playback.ch_name = "tx"; 1189 pri_dai->dma_capture.client = 1190 (struct s3c2410_dma_client *)&pri_dai->dma_capture; 1191 pri_dai->dma_capture.ch_name = "rx"; 1192 pri_dai->dma_playback.dma_size = 4; 1193 pri_dai->dma_capture.dma_size = 4; 1194 pri_dai->base = regs_base; 1195 pri_dai->quirks = quirks; 1196 1197 if (quirks & QUIRK_PRI_6CHAN) 1198 pri_dai->i2s_dai_drv.playback.channels_max = 6; 1199 1200 if (quirks & QUIRK_SEC_DAI) { 1201 sec_dai = i2s_alloc_dai(pdev, true); 1202 if (!sec_dai) { 1203 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); 1204 ret = -ENOMEM; 1205 goto err; 1206 } 1207 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; 1208 sec_dai->dma_playback.client = 1209 (struct s3c2410_dma_client *)&sec_dai->dma_playback; 1210 sec_dai->dma_playback.ch_name = "tx-sec"; 1211 1212 if (!np) { 1213 res = platform_get_resource(pdev, IORESOURCE_DMA, 2); 1214 if (res) 1215 sec_dai->dma_playback.channel = res->start; 1216 } 1217 1218 sec_dai->dma_playback.dma_size = 4; 1219 sec_dai->base = regs_base; 1220 sec_dai->quirks = quirks; 1221 sec_dai->idma_playback.dma_addr = idma_addr; 1222 sec_dai->pri_dai = pri_dai; 1223 pri_dai->sec_dai = sec_dai; 1224 } 1225 1226 if (np) { 1227 if (samsung_i2s_parse_dt_gpio(pri_dai)) { 1228 dev_err(&pdev->dev, "Unable to configure gpio\n"); 1229 ret = -EINVAL; 1230 goto err; 1231 } 1232 } else { 1233 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { 1234 dev_err(&pdev->dev, "Unable to configure gpio\n"); 1235 ret = -EINVAL; 1236 goto err; 1237 } 1238 } 1239 1240 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); 1241 1242 pm_runtime_enable(&pdev->dev); 1243 1244 asoc_dma_platform_register(&pdev->dev); 1245 1246 return 0; 1247 err: 1248 release_mem_region(regs_base, resource_size(res)); 1249 1250 return ret; 1251 } 1252 1253 static int samsung_i2s_remove(struct platform_device *pdev) 1254 { 1255 struct i2s_dai *i2s, *other; 1256 struct resource *res; 1257 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; 1258 1259 i2s = dev_get_drvdata(&pdev->dev); 1260 other = i2s->pri_dai ? : i2s->sec_dai; 1261 1262 if (!i2s_pdata->cfg_gpio && pdev->dev.of_node) 1263 samsung_i2s_dt_gpio_free(i2s->pri_dai); 1264 1265 if (other) { 1266 other->pri_dai = NULL; 1267 other->sec_dai = NULL; 1268 } else { 1269 pm_runtime_disable(&pdev->dev); 1270 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1271 if (res) 1272 release_mem_region(res->start, resource_size(res)); 1273 } 1274 1275 i2s->pri_dai = NULL; 1276 i2s->sec_dai = NULL; 1277 1278 asoc_dma_platform_unregister(&pdev->dev); 1279 snd_soc_unregister_dai(&pdev->dev); 1280 1281 return 0; 1282 } 1283 1284 static struct platform_device_id samsung_i2s_driver_ids[] = { 1285 { 1286 .name = "samsung-i2s", 1287 .driver_data = TYPE_PRI, 1288 }, { 1289 .name = "samsung-i2s-sec", 1290 .driver_data = TYPE_SEC, 1291 }, 1292 {}, 1293 }; 1294 MODULE_DEVICE_TABLE(platform, samsung-i2s-driver-ids); 1295 1296 #ifdef CONFIG_OF 1297 static struct samsung_i2s_dai_data samsung_i2s_dai_data_array[] = { 1298 [TYPE_PRI] = { TYPE_PRI }, 1299 [TYPE_SEC] = { TYPE_SEC }, 1300 }; 1301 1302 static const struct of_device_id exynos_i2s_match[] = { 1303 { .compatible = "samsung,i2s-v5", 1304 .data = &samsung_i2s_dai_data_array[TYPE_PRI], 1305 }, 1306 {}, 1307 }; 1308 MODULE_DEVICE_TABLE(of, exynos_i2s_match); 1309 #endif 1310 1311 static const struct dev_pm_ops samsung_i2s_pm = { 1312 SET_RUNTIME_PM_OPS(i2s_runtime_suspend, 1313 i2s_runtime_resume, NULL) 1314 }; 1315 1316 static struct platform_driver samsung_i2s_driver = { 1317 .probe = samsung_i2s_probe, 1318 .remove = samsung_i2s_remove, 1319 .id_table = samsung_i2s_driver_ids, 1320 .driver = { 1321 .name = "samsung-i2s", 1322 .owner = THIS_MODULE, 1323 .of_match_table = of_match_ptr(exynos_i2s_match), 1324 .pm = &samsung_i2s_pm, 1325 }, 1326 }; 1327 1328 module_platform_driver(samsung_i2s_driver); 1329 1330 /* Module information */ 1331 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>"); 1332 MODULE_DESCRIPTION("Samsung I2S Interface"); 1333 MODULE_ALIAS("platform:samsung-i2s"); 1334 MODULE_LICENSE("GPL"); 1335