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/pm_runtime.h> 19 20 #include <sound/soc.h> 21 #include <sound/pcm_params.h> 22 23 #include <plat/audio.h> 24 25 #include "dma.h" 26 #include "idma.h" 27 #include "i2s.h" 28 #include "i2s-regs.h" 29 30 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) 31 32 struct i2s_dai { 33 /* Platform device for this DAI */ 34 struct platform_device *pdev; 35 /* IOREMAP'd SFRs */ 36 void __iomem *addr; 37 /* Physical base address of SFRs */ 38 u32 base; 39 /* Rate of RCLK source clock */ 40 unsigned long rclk_srcrate; 41 /* Frame Clock */ 42 unsigned frmclk; 43 /* 44 * Specifically requested RCLK,BCLK by MACHINE Driver. 45 * 0 indicates CPU driver is free to choose any value. 46 */ 47 unsigned rfs, bfs; 48 /* I2S Controller's core clock */ 49 struct clk *clk; 50 /* Clock for generating I2S signals */ 51 struct clk *op_clk; 52 /* Array of clock names for op_clk */ 53 const char **src_clk; 54 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ 55 struct i2s_dai *pri_dai; 56 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ 57 struct i2s_dai *sec_dai; 58 #define DAI_OPENED (1 << 0) /* Dai is opened */ 59 #define DAI_MANAGER (1 << 1) /* Dai is the manager */ 60 unsigned mode; 61 /* Driver for this DAI */ 62 struct snd_soc_dai_driver i2s_dai_drv; 63 /* DMA parameters */ 64 struct s3c_dma_params dma_playback; 65 struct s3c_dma_params dma_capture; 66 struct s3c_dma_params idma_playback; 67 u32 quirks; 68 u32 suspend_i2smod; 69 u32 suspend_i2scon; 70 u32 suspend_i2spsr; 71 }; 72 73 /* Lock for cross i/f checks */ 74 static DEFINE_SPINLOCK(lock); 75 76 /* If this is the 'overlay' stereo DAI */ 77 static inline bool is_secondary(struct i2s_dai *i2s) 78 { 79 return i2s->pri_dai ? true : false; 80 } 81 82 /* If operating in SoC-Slave mode */ 83 static inline bool is_slave(struct i2s_dai *i2s) 84 { 85 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; 86 } 87 88 /* If this interface of the controller is transmitting data */ 89 static inline bool tx_active(struct i2s_dai *i2s) 90 { 91 u32 active; 92 93 if (!i2s) 94 return false; 95 96 active = readl(i2s->addr + I2SCON); 97 98 if (is_secondary(i2s)) 99 active &= CON_TXSDMA_ACTIVE; 100 else 101 active &= CON_TXDMA_ACTIVE; 102 103 return active ? true : false; 104 } 105 106 /* If the other interface of the controller is transmitting data */ 107 static inline bool other_tx_active(struct i2s_dai *i2s) 108 { 109 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 110 111 return tx_active(other); 112 } 113 114 /* If any interface of the controller is transmitting data */ 115 static inline bool any_tx_active(struct i2s_dai *i2s) 116 { 117 return tx_active(i2s) || other_tx_active(i2s); 118 } 119 120 /* If this interface of the controller is receiving data */ 121 static inline bool rx_active(struct i2s_dai *i2s) 122 { 123 u32 active; 124 125 if (!i2s) 126 return false; 127 128 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE; 129 130 return active ? true : false; 131 } 132 133 /* If the other interface of the controller is receiving data */ 134 static inline bool other_rx_active(struct i2s_dai *i2s) 135 { 136 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 137 138 return rx_active(other); 139 } 140 141 /* If any interface of the controller is receiving data */ 142 static inline bool any_rx_active(struct i2s_dai *i2s) 143 { 144 return rx_active(i2s) || other_rx_active(i2s); 145 } 146 147 /* If the other DAI is transmitting or receiving data */ 148 static inline bool other_active(struct i2s_dai *i2s) 149 { 150 return other_rx_active(i2s) || other_tx_active(i2s); 151 } 152 153 /* If this DAI is transmitting or receiving data */ 154 static inline bool this_active(struct i2s_dai *i2s) 155 { 156 return tx_active(i2s) || rx_active(i2s); 157 } 158 159 /* If the controller is active anyway */ 160 static inline bool any_active(struct i2s_dai *i2s) 161 { 162 return this_active(i2s) || other_active(i2s); 163 } 164 165 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) 166 { 167 return snd_soc_dai_get_drvdata(dai); 168 } 169 170 static inline bool is_opened(struct i2s_dai *i2s) 171 { 172 if (i2s && (i2s->mode & DAI_OPENED)) 173 return true; 174 else 175 return false; 176 } 177 178 static inline bool is_manager(struct i2s_dai *i2s) 179 { 180 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) 181 return true; 182 else 183 return false; 184 } 185 186 /* Read RCLK of I2S (in multiples of LRCLK) */ 187 static inline unsigned get_rfs(struct i2s_dai *i2s) 188 { 189 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3; 190 191 switch (rfs) { 192 case 3: return 768; 193 case 2: return 384; 194 case 1: return 512; 195 default: return 256; 196 } 197 } 198 199 /* Write RCLK of I2S (in multiples of LRCLK) */ 200 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) 201 { 202 u32 mod = readl(i2s->addr + I2SMOD); 203 204 mod &= ~MOD_RCLK_MASK; 205 206 switch (rfs) { 207 case 768: 208 mod |= MOD_RCLK_768FS; 209 break; 210 case 512: 211 mod |= MOD_RCLK_512FS; 212 break; 213 case 384: 214 mod |= MOD_RCLK_384FS; 215 break; 216 default: 217 mod |= MOD_RCLK_256FS; 218 break; 219 } 220 221 writel(mod, i2s->addr + I2SMOD); 222 } 223 224 /* Read Bit-Clock of I2S (in multiples of LRCLK) */ 225 static inline unsigned get_bfs(struct i2s_dai *i2s) 226 { 227 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3; 228 229 switch (bfs) { 230 case 3: return 24; 231 case 2: return 16; 232 case 1: return 48; 233 default: return 32; 234 } 235 } 236 237 /* Write Bit-Clock of I2S (in multiples of LRCLK) */ 238 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) 239 { 240 u32 mod = readl(i2s->addr + I2SMOD); 241 242 mod &= ~MOD_BCLK_MASK; 243 244 switch (bfs) { 245 case 48: 246 mod |= MOD_BCLK_48FS; 247 break; 248 case 32: 249 mod |= MOD_BCLK_32FS; 250 break; 251 case 24: 252 mod |= MOD_BCLK_24FS; 253 break; 254 case 16: 255 mod |= MOD_BCLK_16FS; 256 break; 257 default: 258 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); 259 return; 260 } 261 262 writel(mod, i2s->addr + I2SMOD); 263 } 264 265 /* Sample-Size */ 266 static inline int get_blc(struct i2s_dai *i2s) 267 { 268 int blc = readl(i2s->addr + I2SMOD); 269 270 blc = (blc >> 13) & 0x3; 271 272 switch (blc) { 273 case 2: return 24; 274 case 1: return 8; 275 default: return 16; 276 } 277 } 278 279 /* TX Channel Control */ 280 static void i2s_txctrl(struct i2s_dai *i2s, int on) 281 { 282 void __iomem *addr = i2s->addr; 283 u32 con = readl(addr + I2SCON); 284 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 285 286 if (on) { 287 con |= CON_ACTIVE; 288 con &= ~CON_TXCH_PAUSE; 289 290 if (is_secondary(i2s)) { 291 con |= CON_TXSDMA_ACTIVE; 292 con &= ~CON_TXSDMA_PAUSE; 293 } else { 294 con |= CON_TXDMA_ACTIVE; 295 con &= ~CON_TXDMA_PAUSE; 296 } 297 298 if (any_rx_active(i2s)) 299 mod |= MOD_TXRX; 300 else 301 mod |= MOD_TXONLY; 302 } else { 303 if (is_secondary(i2s)) { 304 con |= CON_TXSDMA_PAUSE; 305 con &= ~CON_TXSDMA_ACTIVE; 306 } else { 307 con |= CON_TXDMA_PAUSE; 308 con &= ~CON_TXDMA_ACTIVE; 309 } 310 311 if (other_tx_active(i2s)) { 312 writel(con, addr + I2SCON); 313 return; 314 } 315 316 con |= CON_TXCH_PAUSE; 317 318 if (any_rx_active(i2s)) 319 mod |= MOD_RXONLY; 320 else 321 con &= ~CON_ACTIVE; 322 } 323 324 writel(mod, addr + I2SMOD); 325 writel(con, addr + I2SCON); 326 } 327 328 /* RX Channel Control */ 329 static void i2s_rxctrl(struct i2s_dai *i2s, int on) 330 { 331 void __iomem *addr = i2s->addr; 332 u32 con = readl(addr + I2SCON); 333 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 334 335 if (on) { 336 con |= CON_RXDMA_ACTIVE | CON_ACTIVE; 337 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); 338 339 if (any_tx_active(i2s)) 340 mod |= MOD_TXRX; 341 else 342 mod |= MOD_RXONLY; 343 } else { 344 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; 345 con &= ~CON_RXDMA_ACTIVE; 346 347 if (any_tx_active(i2s)) 348 mod |= MOD_TXONLY; 349 else 350 con &= ~CON_ACTIVE; 351 } 352 353 writel(mod, addr + I2SMOD); 354 writel(con, addr + I2SCON); 355 } 356 357 /* Flush FIFO of an interface */ 358 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) 359 { 360 void __iomem *fic; 361 u32 val; 362 363 if (!i2s) 364 return; 365 366 if (is_secondary(i2s)) 367 fic = i2s->addr + I2SFICS; 368 else 369 fic = i2s->addr + I2SFIC; 370 371 /* Flush the FIFO */ 372 writel(readl(fic) | flush, fic); 373 374 /* Be patient */ 375 val = msecs_to_loops(1) / 1000; /* 1 usec */ 376 while (--val) 377 cpu_relax(); 378 379 writel(readl(fic) & ~flush, fic); 380 } 381 382 static int i2s_set_sysclk(struct snd_soc_dai *dai, 383 int clk_id, unsigned int rfs, int dir) 384 { 385 struct i2s_dai *i2s = to_info(dai); 386 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 387 u32 mod = readl(i2s->addr + I2SMOD); 388 389 switch (clk_id) { 390 case SAMSUNG_I2S_CDCLK: 391 /* Shouldn't matter in GATING(CLOCK_IN) mode */ 392 if (dir == SND_SOC_CLOCK_IN) 393 rfs = 0; 394 395 if ((rfs && other->rfs && (other->rfs != rfs)) || 396 (any_active(i2s) && 397 (((dir == SND_SOC_CLOCK_IN) 398 && !(mod & MOD_CDCLKCON)) || 399 ((dir == SND_SOC_CLOCK_OUT) 400 && (mod & MOD_CDCLKCON))))) { 401 dev_err(&i2s->pdev->dev, 402 "%s:%d Other DAI busy\n", __func__, __LINE__); 403 return -EAGAIN; 404 } 405 406 if (dir == SND_SOC_CLOCK_IN) 407 mod |= MOD_CDCLKCON; 408 else 409 mod &= ~MOD_CDCLKCON; 410 411 i2s->rfs = rfs; 412 break; 413 414 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ 415 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ 416 if ((i2s->quirks & QUIRK_NO_MUXPSR) 417 || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) 418 clk_id = 0; 419 else 420 clk_id = 1; 421 422 if (!any_active(i2s)) { 423 if (i2s->op_clk) { 424 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || 425 (!clk_id && (mod & MOD_IMS_SYSMUX))) { 426 clk_disable(i2s->op_clk); 427 clk_put(i2s->op_clk); 428 } else { 429 i2s->rclk_srcrate = 430 clk_get_rate(i2s->op_clk); 431 return 0; 432 } 433 } 434 435 i2s->op_clk = clk_get(&i2s->pdev->dev, 436 i2s->src_clk[clk_id]); 437 clk_enable(i2s->op_clk); 438 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); 439 440 /* Over-ride the other's */ 441 if (other) { 442 other->op_clk = i2s->op_clk; 443 other->rclk_srcrate = i2s->rclk_srcrate; 444 } 445 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) 446 || (clk_id && !(mod & MOD_IMS_SYSMUX))) { 447 dev_err(&i2s->pdev->dev, 448 "%s:%d Other DAI busy\n", __func__, __LINE__); 449 return -EAGAIN; 450 } else { 451 /* Call can't be on the active DAI */ 452 i2s->op_clk = other->op_clk; 453 i2s->rclk_srcrate = other->rclk_srcrate; 454 return 0; 455 } 456 457 if (clk_id == 0) 458 mod &= ~MOD_IMS_SYSMUX; 459 else 460 mod |= MOD_IMS_SYSMUX; 461 break; 462 463 default: 464 dev_err(&i2s->pdev->dev, "We don't serve that!\n"); 465 return -EINVAL; 466 } 467 468 writel(mod, i2s->addr + I2SMOD); 469 470 return 0; 471 } 472 473 static int i2s_set_fmt(struct snd_soc_dai *dai, 474 unsigned int fmt) 475 { 476 struct i2s_dai *i2s = to_info(dai); 477 u32 mod = readl(i2s->addr + I2SMOD); 478 u32 tmp = 0; 479 480 /* Format is priority */ 481 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 482 case SND_SOC_DAIFMT_RIGHT_J: 483 tmp |= MOD_LR_RLOW; 484 tmp |= MOD_SDF_MSB; 485 break; 486 case SND_SOC_DAIFMT_LEFT_J: 487 tmp |= MOD_LR_RLOW; 488 tmp |= MOD_SDF_LSB; 489 break; 490 case SND_SOC_DAIFMT_I2S: 491 tmp |= MOD_SDF_IIS; 492 break; 493 default: 494 dev_err(&i2s->pdev->dev, "Format not supported\n"); 495 return -EINVAL; 496 } 497 498 /* 499 * INV flag is relative to the FORMAT flag - if set it simply 500 * flips the polarity specified by the Standard 501 */ 502 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 503 case SND_SOC_DAIFMT_NB_NF: 504 break; 505 case SND_SOC_DAIFMT_NB_IF: 506 if (tmp & MOD_LR_RLOW) 507 tmp &= ~MOD_LR_RLOW; 508 else 509 tmp |= MOD_LR_RLOW; 510 break; 511 default: 512 dev_err(&i2s->pdev->dev, "Polarity not supported\n"); 513 return -EINVAL; 514 } 515 516 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 517 case SND_SOC_DAIFMT_CBM_CFM: 518 tmp |= MOD_SLAVE; 519 break; 520 case SND_SOC_DAIFMT_CBS_CFS: 521 /* Set default source clock in Master mode */ 522 if (i2s->rclk_srcrate == 0) 523 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, 524 0, SND_SOC_CLOCK_IN); 525 break; 526 default: 527 dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); 528 return -EINVAL; 529 } 530 531 if (any_active(i2s) && 532 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW 533 | MOD_SLAVE)) != tmp)) { 534 dev_err(&i2s->pdev->dev, 535 "%s:%d Other DAI busy\n", __func__, __LINE__); 536 return -EAGAIN; 537 } 538 539 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); 540 mod |= tmp; 541 writel(mod, i2s->addr + I2SMOD); 542 543 return 0; 544 } 545 546 static int i2s_hw_params(struct snd_pcm_substream *substream, 547 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 548 { 549 struct i2s_dai *i2s = to_info(dai); 550 u32 mod = readl(i2s->addr + I2SMOD); 551 552 if (!is_secondary(i2s)) 553 mod &= ~(MOD_DC2_EN | MOD_DC1_EN); 554 555 switch (params_channels(params)) { 556 case 6: 557 mod |= MOD_DC2_EN; 558 case 4: 559 mod |= MOD_DC1_EN; 560 break; 561 case 2: 562 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 563 i2s->dma_playback.dma_size = 4; 564 else 565 i2s->dma_capture.dma_size = 4; 566 break; 567 case 1: 568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 569 i2s->dma_playback.dma_size = 2; 570 else 571 i2s->dma_capture.dma_size = 2; 572 573 break; 574 default: 575 dev_err(&i2s->pdev->dev, "%d channels not supported\n", 576 params_channels(params)); 577 return -EINVAL; 578 } 579 580 if (is_secondary(i2s)) 581 mod &= ~MOD_BLCS_MASK; 582 else 583 mod &= ~MOD_BLCP_MASK; 584 585 if (is_manager(i2s)) 586 mod &= ~MOD_BLC_MASK; 587 588 switch (params_format(params)) { 589 case SNDRV_PCM_FORMAT_S8: 590 if (is_secondary(i2s)) 591 mod |= MOD_BLCS_8BIT; 592 else 593 mod |= MOD_BLCP_8BIT; 594 if (is_manager(i2s)) 595 mod |= MOD_BLC_8BIT; 596 break; 597 case SNDRV_PCM_FORMAT_S16_LE: 598 if (is_secondary(i2s)) 599 mod |= MOD_BLCS_16BIT; 600 else 601 mod |= MOD_BLCP_16BIT; 602 if (is_manager(i2s)) 603 mod |= MOD_BLC_16BIT; 604 break; 605 case SNDRV_PCM_FORMAT_S24_LE: 606 if (is_secondary(i2s)) 607 mod |= MOD_BLCS_24BIT; 608 else 609 mod |= MOD_BLCP_24BIT; 610 if (is_manager(i2s)) 611 mod |= MOD_BLC_24BIT; 612 break; 613 default: 614 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", 615 params_format(params)); 616 return -EINVAL; 617 } 618 writel(mod, i2s->addr + I2SMOD); 619 620 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 621 snd_soc_dai_set_dma_data(dai, substream, 622 (void *)&i2s->dma_playback); 623 else 624 snd_soc_dai_set_dma_data(dai, substream, 625 (void *)&i2s->dma_capture); 626 627 i2s->frmclk = params_rate(params); 628 629 return 0; 630 } 631 632 /* We set constraints on the substream acc to the version of I2S */ 633 static int i2s_startup(struct snd_pcm_substream *substream, 634 struct snd_soc_dai *dai) 635 { 636 struct i2s_dai *i2s = to_info(dai); 637 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 638 unsigned long flags; 639 640 spin_lock_irqsave(&lock, flags); 641 642 i2s->mode |= DAI_OPENED; 643 644 if (is_manager(other)) 645 i2s->mode &= ~DAI_MANAGER; 646 else 647 i2s->mode |= DAI_MANAGER; 648 649 /* Enforce set_sysclk in Master mode */ 650 i2s->rclk_srcrate = 0; 651 652 spin_unlock_irqrestore(&lock, flags); 653 654 return 0; 655 } 656 657 static void i2s_shutdown(struct snd_pcm_substream *substream, 658 struct snd_soc_dai *dai) 659 { 660 struct i2s_dai *i2s = to_info(dai); 661 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 662 unsigned long flags; 663 664 spin_lock_irqsave(&lock, flags); 665 666 i2s->mode &= ~DAI_OPENED; 667 i2s->mode &= ~DAI_MANAGER; 668 669 if (is_opened(other)) 670 other->mode |= DAI_MANAGER; 671 672 /* Reset any constraint on RFS and BFS */ 673 i2s->rfs = 0; 674 i2s->bfs = 0; 675 676 spin_unlock_irqrestore(&lock, flags); 677 678 /* Gate CDCLK by default */ 679 if (!is_opened(other)) 680 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 681 0, SND_SOC_CLOCK_IN); 682 } 683 684 static int config_setup(struct i2s_dai *i2s) 685 { 686 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 687 unsigned rfs, bfs, blc; 688 u32 psr; 689 690 blc = get_blc(i2s); 691 692 bfs = i2s->bfs; 693 694 if (!bfs && other) 695 bfs = other->bfs; 696 697 /* Select least possible multiple(2) if no constraint set */ 698 if (!bfs) 699 bfs = blc * 2; 700 701 rfs = i2s->rfs; 702 703 if (!rfs && other) 704 rfs = other->rfs; 705 706 if ((rfs == 256 || rfs == 512) && (blc == 24)) { 707 dev_err(&i2s->pdev->dev, 708 "%d-RFS not supported for 24-blc\n", rfs); 709 return -EINVAL; 710 } 711 712 if (!rfs) { 713 if (bfs == 16 || bfs == 32) 714 rfs = 256; 715 else 716 rfs = 384; 717 } 718 719 /* If already setup and running */ 720 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { 721 dev_err(&i2s->pdev->dev, 722 "%s:%d Other DAI busy\n", __func__, __LINE__); 723 return -EAGAIN; 724 } 725 726 /* Don't bother RFS, BFS & PSR in Slave mode */ 727 if (is_slave(i2s)) 728 return 0; 729 730 set_bfs(i2s, bfs); 731 set_rfs(i2s, rfs); 732 733 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { 734 psr = i2s->rclk_srcrate / i2s->frmclk / rfs; 735 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); 736 dev_dbg(&i2s->pdev->dev, 737 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", 738 i2s->rclk_srcrate, psr, rfs, bfs); 739 } 740 741 return 0; 742 } 743 744 static int i2s_trigger(struct snd_pcm_substream *substream, 745 int cmd, struct snd_soc_dai *dai) 746 { 747 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); 748 struct snd_soc_pcm_runtime *rtd = substream->private_data; 749 struct i2s_dai *i2s = to_info(rtd->cpu_dai); 750 unsigned long flags; 751 752 switch (cmd) { 753 case SNDRV_PCM_TRIGGER_START: 754 case SNDRV_PCM_TRIGGER_RESUME: 755 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 756 local_irq_save(flags); 757 758 if (config_setup(i2s)) { 759 local_irq_restore(flags); 760 return -EINVAL; 761 } 762 763 if (capture) 764 i2s_rxctrl(i2s, 1); 765 else 766 i2s_txctrl(i2s, 1); 767 768 local_irq_restore(flags); 769 break; 770 case SNDRV_PCM_TRIGGER_STOP: 771 case SNDRV_PCM_TRIGGER_SUSPEND: 772 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 773 local_irq_save(flags); 774 775 if (capture) { 776 i2s_rxctrl(i2s, 0); 777 i2s_fifo(i2s, FIC_RXFLUSH); 778 } else { 779 i2s_txctrl(i2s, 0); 780 i2s_fifo(i2s, FIC_TXFLUSH); 781 } 782 783 local_irq_restore(flags); 784 break; 785 } 786 787 return 0; 788 } 789 790 static int i2s_set_clkdiv(struct snd_soc_dai *dai, 791 int div_id, int div) 792 { 793 struct i2s_dai *i2s = to_info(dai); 794 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 795 796 switch (div_id) { 797 case SAMSUNG_I2S_DIV_BCLK: 798 if ((any_active(i2s) && div && (get_bfs(i2s) != div)) 799 || (other && other->bfs && (other->bfs != div))) { 800 dev_err(&i2s->pdev->dev, 801 "%s:%d Other DAI busy\n", __func__, __LINE__); 802 return -EAGAIN; 803 } 804 i2s->bfs = div; 805 break; 806 default: 807 dev_err(&i2s->pdev->dev, 808 "Invalid clock divider(%d)\n", div_id); 809 return -EINVAL; 810 } 811 812 return 0; 813 } 814 815 static snd_pcm_sframes_t 816 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) 817 { 818 struct i2s_dai *i2s = to_info(dai); 819 u32 reg = readl(i2s->addr + I2SFIC); 820 snd_pcm_sframes_t delay; 821 822 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 823 delay = FIC_RXCOUNT(reg); 824 else if (is_secondary(i2s)) 825 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); 826 else 827 delay = FIC_TXCOUNT(reg); 828 829 return delay; 830 } 831 832 #ifdef CONFIG_PM 833 static int i2s_suspend(struct snd_soc_dai *dai) 834 { 835 struct i2s_dai *i2s = to_info(dai); 836 837 if (dai->active) { 838 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); 839 i2s->suspend_i2scon = readl(i2s->addr + I2SCON); 840 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); 841 } 842 843 return 0; 844 } 845 846 static int i2s_resume(struct snd_soc_dai *dai) 847 { 848 struct i2s_dai *i2s = to_info(dai); 849 850 if (dai->active) { 851 writel(i2s->suspend_i2scon, i2s->addr + I2SCON); 852 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); 853 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); 854 } 855 856 return 0; 857 } 858 #else 859 #define i2s_suspend NULL 860 #define i2s_resume NULL 861 #endif 862 863 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) 864 { 865 struct i2s_dai *i2s = to_info(dai); 866 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 867 868 if (other && other->clk) /* If this is probe on secondary */ 869 goto probe_exit; 870 871 i2s->addr = ioremap(i2s->base, 0x100); 872 if (i2s->addr == NULL) { 873 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); 874 return -ENXIO; 875 } 876 877 i2s->clk = clk_get(&i2s->pdev->dev, "iis"); 878 if (IS_ERR(i2s->clk)) { 879 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); 880 iounmap(i2s->addr); 881 return -ENOENT; 882 } 883 clk_enable(i2s->clk); 884 885 if (other) { 886 other->addr = i2s->addr; 887 other->clk = i2s->clk; 888 } 889 890 if (i2s->quirks & QUIRK_NEED_RSTCLR) 891 writel(CON_RSTCLR, i2s->addr + I2SCON); 892 893 if (i2s->quirks & QUIRK_SEC_DAI) 894 idma_reg_addr_init(i2s->addr, 895 i2s->sec_dai->idma_playback.dma_addr); 896 897 probe_exit: 898 /* Reset any constraint on RFS and BFS */ 899 i2s->rfs = 0; 900 i2s->bfs = 0; 901 i2s_txctrl(i2s, 0); 902 i2s_rxctrl(i2s, 0); 903 i2s_fifo(i2s, FIC_TXFLUSH); 904 i2s_fifo(other, FIC_TXFLUSH); 905 i2s_fifo(i2s, FIC_RXFLUSH); 906 907 /* Gate CDCLK by default */ 908 if (!is_opened(other)) 909 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 910 0, SND_SOC_CLOCK_IN); 911 912 return 0; 913 } 914 915 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) 916 { 917 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); 918 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 919 920 if (!other || !other->clk) { 921 922 if (i2s->quirks & QUIRK_NEED_RSTCLR) 923 writel(0, i2s->addr + I2SCON); 924 925 clk_disable(i2s->clk); 926 clk_put(i2s->clk); 927 928 iounmap(i2s->addr); 929 } 930 931 i2s->clk = NULL; 932 933 return 0; 934 } 935 936 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { 937 .trigger = i2s_trigger, 938 .hw_params = i2s_hw_params, 939 .set_fmt = i2s_set_fmt, 940 .set_clkdiv = i2s_set_clkdiv, 941 .set_sysclk = i2s_set_sysclk, 942 .startup = i2s_startup, 943 .shutdown = i2s_shutdown, 944 .delay = i2s_delay, 945 }; 946 947 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 948 949 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ 950 SNDRV_PCM_FMTBIT_S16_LE | \ 951 SNDRV_PCM_FMTBIT_S24_LE) 952 953 static __devinit 954 struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) 955 { 956 struct i2s_dai *i2s; 957 958 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL); 959 if (i2s == NULL) 960 return NULL; 961 962 i2s->pdev = pdev; 963 i2s->pri_dai = NULL; 964 i2s->sec_dai = NULL; 965 i2s->i2s_dai_drv.symmetric_rates = 1; 966 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; 967 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; 968 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; 969 i2s->i2s_dai_drv.suspend = i2s_suspend; 970 i2s->i2s_dai_drv.resume = i2s_resume; 971 i2s->i2s_dai_drv.playback.channels_min = 2; 972 i2s->i2s_dai_drv.playback.channels_max = 2; 973 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; 974 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; 975 976 if (!sec) { 977 i2s->i2s_dai_drv.capture.channels_min = 1; 978 i2s->i2s_dai_drv.capture.channels_max = 2; 979 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; 980 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; 981 } else { /* Create a new platform_device for Secondary */ 982 i2s->pdev = platform_device_register_resndata(NULL, 983 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF, 984 NULL, 0, NULL, 0); 985 if (IS_ERR(i2s->pdev)) 986 return NULL; 987 } 988 989 /* Pre-assign snd_soc_dai_set_drvdata */ 990 dev_set_drvdata(&i2s->pdev->dev, i2s); 991 992 return i2s; 993 } 994 995 static __devinit int samsung_i2s_probe(struct platform_device *pdev) 996 { 997 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan; 998 struct i2s_dai *pri_dai, *sec_dai = NULL; 999 struct s3c_audio_pdata *i2s_pdata; 1000 struct samsung_i2s *i2s_cfg; 1001 struct resource *res; 1002 u32 regs_base, quirks; 1003 int ret = 0; 1004 1005 /* Call during Seconday interface registration */ 1006 if (pdev->id >= SAMSUNG_I2S_SECOFF) { 1007 sec_dai = dev_get_drvdata(&pdev->dev); 1008 snd_soc_register_dai(&sec_dai->pdev->dev, 1009 &sec_dai->i2s_dai_drv); 1010 return 0; 1011 } 1012 1013 i2s_pdata = pdev->dev.platform_data; 1014 if (i2s_pdata == NULL) { 1015 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); 1016 return -EINVAL; 1017 } 1018 1019 res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 1020 if (!res) { 1021 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); 1022 return -ENXIO; 1023 } 1024 dma_pl_chan = res->start; 1025 1026 res = platform_get_resource(pdev, IORESOURCE_DMA, 1); 1027 if (!res) { 1028 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n"); 1029 return -ENXIO; 1030 } 1031 dma_cp_chan = res->start; 1032 1033 res = platform_get_resource(pdev, IORESOURCE_DMA, 2); 1034 if (res) 1035 dma_pl_sec_chan = res->start; 1036 else 1037 dma_pl_sec_chan = 0; 1038 1039 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1040 if (!res) { 1041 dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); 1042 return -ENXIO; 1043 } 1044 1045 if (!request_mem_region(res->start, resource_size(res), 1046 "samsung-i2s")) { 1047 dev_err(&pdev->dev, "Unable to request SFR region\n"); 1048 return -EBUSY; 1049 } 1050 regs_base = res->start; 1051 1052 i2s_cfg = &i2s_pdata->type.i2s; 1053 quirks = i2s_cfg->quirks; 1054 1055 pri_dai = i2s_alloc_dai(pdev, false); 1056 if (!pri_dai) { 1057 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); 1058 ret = -ENOMEM; 1059 goto err; 1060 } 1061 1062 pri_dai->dma_playback.dma_addr = regs_base + I2STXD; 1063 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; 1064 pri_dai->dma_playback.client = 1065 (struct s3c2410_dma_client *)&pri_dai->dma_playback; 1066 pri_dai->dma_capture.client = 1067 (struct s3c2410_dma_client *)&pri_dai->dma_capture; 1068 pri_dai->dma_playback.channel = dma_pl_chan; 1069 pri_dai->dma_capture.channel = dma_cp_chan; 1070 pri_dai->src_clk = i2s_cfg->src_clk; 1071 pri_dai->dma_playback.dma_size = 4; 1072 pri_dai->dma_capture.dma_size = 4; 1073 pri_dai->base = regs_base; 1074 pri_dai->quirks = quirks; 1075 1076 if (quirks & QUIRK_PRI_6CHAN) 1077 pri_dai->i2s_dai_drv.playback.channels_max = 6; 1078 1079 if (quirks & QUIRK_SEC_DAI) { 1080 sec_dai = i2s_alloc_dai(pdev, true); 1081 if (!sec_dai) { 1082 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); 1083 ret = -ENOMEM; 1084 goto err; 1085 } 1086 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; 1087 sec_dai->dma_playback.client = 1088 (struct s3c2410_dma_client *)&sec_dai->dma_playback; 1089 /* Use iDMA always if SysDMA not provided */ 1090 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1; 1091 sec_dai->src_clk = i2s_cfg->src_clk; 1092 sec_dai->dma_playback.dma_size = 4; 1093 sec_dai->base = regs_base; 1094 sec_dai->quirks = quirks; 1095 sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr; 1096 sec_dai->pri_dai = pri_dai; 1097 pri_dai->sec_dai = sec_dai; 1098 } 1099 1100 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { 1101 dev_err(&pdev->dev, "Unable to configure gpio\n"); 1102 ret = -EINVAL; 1103 goto err; 1104 } 1105 1106 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); 1107 1108 pm_runtime_enable(&pdev->dev); 1109 1110 return 0; 1111 err: 1112 release_mem_region(regs_base, resource_size(res)); 1113 1114 return ret; 1115 } 1116 1117 static __devexit int samsung_i2s_remove(struct platform_device *pdev) 1118 { 1119 struct i2s_dai *i2s, *other; 1120 struct resource *res; 1121 1122 i2s = dev_get_drvdata(&pdev->dev); 1123 other = i2s->pri_dai ? : i2s->sec_dai; 1124 1125 if (other) { 1126 other->pri_dai = NULL; 1127 other->sec_dai = NULL; 1128 } else { 1129 pm_runtime_disable(&pdev->dev); 1130 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1131 if (res) 1132 release_mem_region(res->start, resource_size(res)); 1133 } 1134 1135 i2s->pri_dai = NULL; 1136 i2s->sec_dai = NULL; 1137 1138 snd_soc_unregister_dai(&pdev->dev); 1139 1140 return 0; 1141 } 1142 1143 static struct platform_driver samsung_i2s_driver = { 1144 .probe = samsung_i2s_probe, 1145 .remove = __devexit_p(samsung_i2s_remove), 1146 .driver = { 1147 .name = "samsung-i2s", 1148 .owner = THIS_MODULE, 1149 }, 1150 }; 1151 1152 module_platform_driver(samsung_i2s_driver); 1153 1154 /* Module information */ 1155 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>"); 1156 MODULE_DESCRIPTION("Samsung I2S Interface"); 1157 MODULE_ALIAS("platform:samsung-i2s"); 1158 MODULE_LICENSE("GPL"); 1159