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 u32 quirks; 44 }; 45 46 struct i2s_dai { 47 /* Platform device for this DAI */ 48 struct platform_device *pdev; 49 /* IOREMAP'd SFRs */ 50 void __iomem *addr; 51 /* Physical base address of SFRs */ 52 u32 base; 53 /* Rate of RCLK source clock */ 54 unsigned long rclk_srcrate; 55 /* Frame Clock */ 56 unsigned frmclk; 57 /* 58 * Specifically requested RCLK,BCLK by MACHINE Driver. 59 * 0 indicates CPU driver is free to choose any value. 60 */ 61 unsigned rfs, bfs; 62 /* I2S Controller's core clock */ 63 struct clk *clk; 64 /* Clock for generating I2S signals */ 65 struct clk *op_clk; 66 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ 67 struct i2s_dai *pri_dai; 68 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ 69 struct i2s_dai *sec_dai; 70 #define DAI_OPENED (1 << 0) /* Dai is opened */ 71 #define DAI_MANAGER (1 << 1) /* Dai is the manager */ 72 unsigned mode; 73 /* Driver for this DAI */ 74 struct snd_soc_dai_driver i2s_dai_drv; 75 /* DMA parameters */ 76 struct s3c_dma_params dma_playback; 77 struct s3c_dma_params dma_capture; 78 struct s3c_dma_params idma_playback; 79 u32 quirks; 80 u32 suspend_i2smod; 81 u32 suspend_i2scon; 82 u32 suspend_i2spsr; 83 unsigned long gpios[7]; /* i2s gpio line numbers */ 84 }; 85 86 /* Lock for cross i/f checks */ 87 static DEFINE_SPINLOCK(lock); 88 89 /* If this is the 'overlay' stereo DAI */ 90 static inline bool is_secondary(struct i2s_dai *i2s) 91 { 92 return i2s->pri_dai ? true : false; 93 } 94 95 /* If operating in SoC-Slave mode */ 96 static inline bool is_slave(struct i2s_dai *i2s) 97 { 98 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; 99 } 100 101 /* If this interface of the controller is transmitting data */ 102 static inline bool tx_active(struct i2s_dai *i2s) 103 { 104 u32 active; 105 106 if (!i2s) 107 return false; 108 109 active = readl(i2s->addr + I2SCON); 110 111 if (is_secondary(i2s)) 112 active &= CON_TXSDMA_ACTIVE; 113 else 114 active &= CON_TXDMA_ACTIVE; 115 116 return active ? true : false; 117 } 118 119 /* If the other interface of the controller is transmitting data */ 120 static inline bool other_tx_active(struct i2s_dai *i2s) 121 { 122 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 123 124 return tx_active(other); 125 } 126 127 /* If any interface of the controller is transmitting data */ 128 static inline bool any_tx_active(struct i2s_dai *i2s) 129 { 130 return tx_active(i2s) || other_tx_active(i2s); 131 } 132 133 /* If this interface of the controller is receiving data */ 134 static inline bool rx_active(struct i2s_dai *i2s) 135 { 136 u32 active; 137 138 if (!i2s) 139 return false; 140 141 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE; 142 143 return active ? true : false; 144 } 145 146 /* If the other interface of the controller is receiving data */ 147 static inline bool other_rx_active(struct i2s_dai *i2s) 148 { 149 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 150 151 return rx_active(other); 152 } 153 154 /* If any interface of the controller is receiving data */ 155 static inline bool any_rx_active(struct i2s_dai *i2s) 156 { 157 return rx_active(i2s) || other_rx_active(i2s); 158 } 159 160 /* If the other DAI is transmitting or receiving data */ 161 static inline bool other_active(struct i2s_dai *i2s) 162 { 163 return other_rx_active(i2s) || other_tx_active(i2s); 164 } 165 166 /* If this DAI is transmitting or receiving data */ 167 static inline bool this_active(struct i2s_dai *i2s) 168 { 169 return tx_active(i2s) || rx_active(i2s); 170 } 171 172 /* If the controller is active anyway */ 173 static inline bool any_active(struct i2s_dai *i2s) 174 { 175 return this_active(i2s) || other_active(i2s); 176 } 177 178 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) 179 { 180 return snd_soc_dai_get_drvdata(dai); 181 } 182 183 static inline bool is_opened(struct i2s_dai *i2s) 184 { 185 if (i2s && (i2s->mode & DAI_OPENED)) 186 return true; 187 else 188 return false; 189 } 190 191 static inline bool is_manager(struct i2s_dai *i2s) 192 { 193 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) 194 return true; 195 else 196 return false; 197 } 198 199 /* Read RCLK of I2S (in multiples of LRCLK) */ 200 static inline unsigned get_rfs(struct i2s_dai *i2s) 201 { 202 u32 rfs; 203 204 if (i2s->quirks & QUIRK_SUPPORTS_TDM) 205 rfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_RCLK_SHIFT; 206 else 207 rfs = (readl(i2s->addr + I2SMOD) >> MOD_RCLK_SHIFT); 208 rfs &= MOD_RCLK_MASK; 209 210 switch (rfs) { 211 case 3: return 768; 212 case 2: return 384; 213 case 1: return 512; 214 default: return 256; 215 } 216 } 217 218 /* Write RCLK of I2S (in multiples of LRCLK) */ 219 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) 220 { 221 u32 mod = readl(i2s->addr + I2SMOD); 222 int rfs_shift; 223 224 if (i2s->quirks & QUIRK_SUPPORTS_TDM) 225 rfs_shift = EXYNOS5420_MOD_RCLK_SHIFT; 226 else 227 rfs_shift = MOD_RCLK_SHIFT; 228 mod &= ~(MOD_RCLK_MASK << rfs_shift); 229 230 switch (rfs) { 231 case 768: 232 mod |= (MOD_RCLK_768FS << rfs_shift); 233 break; 234 case 512: 235 mod |= (MOD_RCLK_512FS << rfs_shift); 236 break; 237 case 384: 238 mod |= (MOD_RCLK_384FS << rfs_shift); 239 break; 240 default: 241 mod |= (MOD_RCLK_256FS << rfs_shift); 242 break; 243 } 244 245 writel(mod, i2s->addr + I2SMOD); 246 } 247 248 /* Read Bit-Clock of I2S (in multiples of LRCLK) */ 249 static inline unsigned get_bfs(struct i2s_dai *i2s) 250 { 251 u32 bfs; 252 253 if (i2s->quirks & QUIRK_SUPPORTS_TDM) { 254 bfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_BCLK_SHIFT; 255 bfs &= EXYNOS5420_MOD_BCLK_MASK; 256 } else { 257 bfs = readl(i2s->addr + I2SMOD) >> MOD_BCLK_SHIFT; 258 bfs &= MOD_BCLK_MASK; 259 } 260 261 switch (bfs) { 262 case 8: return 256; 263 case 7: return 192; 264 case 6: return 128; 265 case 5: return 96; 266 case 4: return 64; 267 case 3: return 24; 268 case 2: return 16; 269 case 1: return 48; 270 default: return 32; 271 } 272 } 273 274 /* Write Bit-Clock of I2S (in multiples of LRCLK) */ 275 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) 276 { 277 u32 mod = readl(i2s->addr + I2SMOD); 278 int bfs_shift; 279 int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM; 280 281 if (i2s->quirks & QUIRK_SUPPORTS_TDM) { 282 bfs_shift = EXYNOS5420_MOD_BCLK_SHIFT; 283 mod &= ~(EXYNOS5420_MOD_BCLK_MASK << bfs_shift); 284 } else { 285 bfs_shift = MOD_BCLK_SHIFT; 286 mod &= ~(MOD_BCLK_MASK << bfs_shift); 287 } 288 289 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */ 290 if (!tdm && bfs > 48) { 291 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n"); 292 return; 293 } 294 295 switch (bfs) { 296 case 48: 297 mod |= (MOD_BCLK_48FS << bfs_shift); 298 break; 299 case 32: 300 mod |= (MOD_BCLK_32FS << bfs_shift); 301 break; 302 case 24: 303 mod |= (MOD_BCLK_24FS << bfs_shift); 304 break; 305 case 16: 306 mod |= (MOD_BCLK_16FS << bfs_shift); 307 break; 308 case 64: 309 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift); 310 break; 311 case 96: 312 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift); 313 break; 314 case 128: 315 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift); 316 break; 317 case 192: 318 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift); 319 break; 320 case 256: 321 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift); 322 break; 323 default: 324 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); 325 return; 326 } 327 328 writel(mod, i2s->addr + I2SMOD); 329 } 330 331 /* Sample-Size */ 332 static inline int get_blc(struct i2s_dai *i2s) 333 { 334 int blc = readl(i2s->addr + I2SMOD); 335 336 blc = (blc >> 13) & 0x3; 337 338 switch (blc) { 339 case 2: return 24; 340 case 1: return 8; 341 default: return 16; 342 } 343 } 344 345 /* TX Channel Control */ 346 static void i2s_txctrl(struct i2s_dai *i2s, int on) 347 { 348 void __iomem *addr = i2s->addr; 349 u32 con = readl(addr + I2SCON); 350 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 351 352 if (on) { 353 con |= CON_ACTIVE; 354 con &= ~CON_TXCH_PAUSE; 355 356 if (is_secondary(i2s)) { 357 con |= CON_TXSDMA_ACTIVE; 358 con &= ~CON_TXSDMA_PAUSE; 359 } else { 360 con |= CON_TXDMA_ACTIVE; 361 con &= ~CON_TXDMA_PAUSE; 362 } 363 364 if (any_rx_active(i2s)) 365 mod |= MOD_TXRX; 366 else 367 mod |= MOD_TXONLY; 368 } else { 369 if (is_secondary(i2s)) { 370 con |= CON_TXSDMA_PAUSE; 371 con &= ~CON_TXSDMA_ACTIVE; 372 } else { 373 con |= CON_TXDMA_PAUSE; 374 con &= ~CON_TXDMA_ACTIVE; 375 } 376 377 if (other_tx_active(i2s)) { 378 writel(con, addr + I2SCON); 379 return; 380 } 381 382 con |= CON_TXCH_PAUSE; 383 384 if (any_rx_active(i2s)) 385 mod |= MOD_RXONLY; 386 else 387 con &= ~CON_ACTIVE; 388 } 389 390 writel(mod, addr + I2SMOD); 391 writel(con, addr + I2SCON); 392 } 393 394 /* RX Channel Control */ 395 static void i2s_rxctrl(struct i2s_dai *i2s, int on) 396 { 397 void __iomem *addr = i2s->addr; 398 u32 con = readl(addr + I2SCON); 399 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 400 401 if (on) { 402 con |= CON_RXDMA_ACTIVE | CON_ACTIVE; 403 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); 404 405 if (any_tx_active(i2s)) 406 mod |= MOD_TXRX; 407 else 408 mod |= MOD_RXONLY; 409 } else { 410 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; 411 con &= ~CON_RXDMA_ACTIVE; 412 413 if (any_tx_active(i2s)) 414 mod |= MOD_TXONLY; 415 else 416 con &= ~CON_ACTIVE; 417 } 418 419 writel(mod, addr + I2SMOD); 420 writel(con, addr + I2SCON); 421 } 422 423 /* Flush FIFO of an interface */ 424 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) 425 { 426 void __iomem *fic; 427 u32 val; 428 429 if (!i2s) 430 return; 431 432 if (is_secondary(i2s)) 433 fic = i2s->addr + I2SFICS; 434 else 435 fic = i2s->addr + I2SFIC; 436 437 /* Flush the FIFO */ 438 writel(readl(fic) | flush, fic); 439 440 /* Be patient */ 441 val = msecs_to_loops(1) / 1000; /* 1 usec */ 442 while (--val) 443 cpu_relax(); 444 445 writel(readl(fic) & ~flush, fic); 446 } 447 448 static int i2s_set_sysclk(struct snd_soc_dai *dai, 449 int clk_id, unsigned int rfs, int dir) 450 { 451 struct i2s_dai *i2s = to_info(dai); 452 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 453 u32 mod = readl(i2s->addr + I2SMOD); 454 455 switch (clk_id) { 456 case SAMSUNG_I2S_CDCLK: 457 /* Shouldn't matter in GATING(CLOCK_IN) mode */ 458 if (dir == SND_SOC_CLOCK_IN) 459 rfs = 0; 460 461 if ((rfs && other->rfs && (other->rfs != rfs)) || 462 (any_active(i2s) && 463 (((dir == SND_SOC_CLOCK_IN) 464 && !(mod & MOD_CDCLKCON)) || 465 ((dir == SND_SOC_CLOCK_OUT) 466 && (mod & MOD_CDCLKCON))))) { 467 dev_err(&i2s->pdev->dev, 468 "%s:%d Other DAI busy\n", __func__, __LINE__); 469 return -EAGAIN; 470 } 471 472 if (dir == SND_SOC_CLOCK_IN) 473 mod |= MOD_CDCLKCON; 474 else 475 mod &= ~MOD_CDCLKCON; 476 477 i2s->rfs = rfs; 478 break; 479 480 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ 481 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ 482 if ((i2s->quirks & QUIRK_NO_MUXPSR) 483 || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) 484 clk_id = 0; 485 else 486 clk_id = 1; 487 488 if (!any_active(i2s)) { 489 if (i2s->op_clk) { 490 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || 491 (!clk_id && (mod & MOD_IMS_SYSMUX))) { 492 clk_disable_unprepare(i2s->op_clk); 493 clk_put(i2s->op_clk); 494 } else { 495 i2s->rclk_srcrate = 496 clk_get_rate(i2s->op_clk); 497 return 0; 498 } 499 } 500 501 if (clk_id) 502 i2s->op_clk = clk_get(&i2s->pdev->dev, 503 "i2s_opclk1"); 504 else 505 i2s->op_clk = clk_get(&i2s->pdev->dev, 506 "i2s_opclk0"); 507 clk_prepare_enable(i2s->op_clk); 508 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); 509 510 /* Over-ride the other's */ 511 if (other) { 512 other->op_clk = i2s->op_clk; 513 other->rclk_srcrate = i2s->rclk_srcrate; 514 } 515 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) 516 || (clk_id && !(mod & MOD_IMS_SYSMUX))) { 517 dev_err(&i2s->pdev->dev, 518 "%s:%d Other DAI busy\n", __func__, __LINE__); 519 return -EAGAIN; 520 } else { 521 /* Call can't be on the active DAI */ 522 i2s->op_clk = other->op_clk; 523 i2s->rclk_srcrate = other->rclk_srcrate; 524 return 0; 525 } 526 527 if (clk_id == 0) 528 mod &= ~MOD_IMS_SYSMUX; 529 else 530 mod |= MOD_IMS_SYSMUX; 531 break; 532 533 default: 534 dev_err(&i2s->pdev->dev, "We don't serve that!\n"); 535 return -EINVAL; 536 } 537 538 writel(mod, i2s->addr + I2SMOD); 539 540 return 0; 541 } 542 543 static int i2s_set_fmt(struct snd_soc_dai *dai, 544 unsigned int fmt) 545 { 546 struct i2s_dai *i2s = to_info(dai); 547 u32 mod = readl(i2s->addr + I2SMOD); 548 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow; 549 u32 tmp = 0; 550 551 if (i2s->quirks & QUIRK_SUPPORTS_TDM) { 552 lrp_shift = EXYNOS5420_MOD_LRP_SHIFT; 553 sdf_shift = EXYNOS5420_MOD_SDF_SHIFT; 554 } else { 555 lrp_shift = MOD_LRP_SHIFT; 556 sdf_shift = MOD_SDF_SHIFT; 557 } 558 559 sdf_mask = MOD_SDF_MASK << sdf_shift; 560 lrp_rlow = MOD_LR_RLOW << lrp_shift; 561 562 /* Format is priority */ 563 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 564 case SND_SOC_DAIFMT_RIGHT_J: 565 tmp |= lrp_rlow; 566 tmp |= (MOD_SDF_MSB << sdf_shift); 567 break; 568 case SND_SOC_DAIFMT_LEFT_J: 569 tmp |= lrp_rlow; 570 tmp |= (MOD_SDF_LSB << sdf_shift); 571 break; 572 case SND_SOC_DAIFMT_I2S: 573 tmp |= (MOD_SDF_IIS << sdf_shift); 574 break; 575 default: 576 dev_err(&i2s->pdev->dev, "Format not supported\n"); 577 return -EINVAL; 578 } 579 580 /* 581 * INV flag is relative to the FORMAT flag - if set it simply 582 * flips the polarity specified by the Standard 583 */ 584 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 585 case SND_SOC_DAIFMT_NB_NF: 586 break; 587 case SND_SOC_DAIFMT_NB_IF: 588 if (tmp & lrp_rlow) 589 tmp &= ~lrp_rlow; 590 else 591 tmp |= lrp_rlow; 592 break; 593 default: 594 dev_err(&i2s->pdev->dev, "Polarity not supported\n"); 595 return -EINVAL; 596 } 597 598 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 599 case SND_SOC_DAIFMT_CBM_CFM: 600 tmp |= MOD_SLAVE; 601 break; 602 case SND_SOC_DAIFMT_CBS_CFS: 603 /* Set default source clock in Master mode */ 604 if (i2s->rclk_srcrate == 0) 605 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, 606 0, SND_SOC_CLOCK_IN); 607 break; 608 default: 609 dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); 610 return -EINVAL; 611 } 612 613 /* 614 * Don't change the I2S mode if any controller is active on this 615 * channel. 616 */ 617 if (any_active(i2s) && 618 ((mod & (sdf_mask | lrp_rlow | MOD_SLAVE)) != tmp)) { 619 dev_err(&i2s->pdev->dev, 620 "%s:%d Other DAI busy\n", __func__, __LINE__); 621 return -EAGAIN; 622 } 623 624 mod &= ~(sdf_mask | lrp_rlow | MOD_SLAVE); 625 mod |= tmp; 626 writel(mod, i2s->addr + I2SMOD); 627 628 return 0; 629 } 630 631 static int i2s_hw_params(struct snd_pcm_substream *substream, 632 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 633 { 634 struct i2s_dai *i2s = to_info(dai); 635 u32 mod = readl(i2s->addr + I2SMOD); 636 637 if (!is_secondary(i2s)) 638 mod &= ~(MOD_DC2_EN | MOD_DC1_EN); 639 640 switch (params_channels(params)) { 641 case 6: 642 mod |= MOD_DC2_EN; 643 case 4: 644 mod |= MOD_DC1_EN; 645 break; 646 case 2: 647 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 648 i2s->dma_playback.dma_size = 4; 649 else 650 i2s->dma_capture.dma_size = 4; 651 break; 652 case 1: 653 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 654 i2s->dma_playback.dma_size = 2; 655 else 656 i2s->dma_capture.dma_size = 2; 657 658 break; 659 default: 660 dev_err(&i2s->pdev->dev, "%d channels not supported\n", 661 params_channels(params)); 662 return -EINVAL; 663 } 664 665 if (is_secondary(i2s)) 666 mod &= ~MOD_BLCS_MASK; 667 else 668 mod &= ~MOD_BLCP_MASK; 669 670 if (is_manager(i2s)) 671 mod &= ~MOD_BLC_MASK; 672 673 switch (params_format(params)) { 674 case SNDRV_PCM_FORMAT_S8: 675 if (is_secondary(i2s)) 676 mod |= MOD_BLCS_8BIT; 677 else 678 mod |= MOD_BLCP_8BIT; 679 if (is_manager(i2s)) 680 mod |= MOD_BLC_8BIT; 681 break; 682 case SNDRV_PCM_FORMAT_S16_LE: 683 if (is_secondary(i2s)) 684 mod |= MOD_BLCS_16BIT; 685 else 686 mod |= MOD_BLCP_16BIT; 687 if (is_manager(i2s)) 688 mod |= MOD_BLC_16BIT; 689 break; 690 case SNDRV_PCM_FORMAT_S24_LE: 691 if (is_secondary(i2s)) 692 mod |= MOD_BLCS_24BIT; 693 else 694 mod |= MOD_BLCP_24BIT; 695 if (is_manager(i2s)) 696 mod |= MOD_BLC_24BIT; 697 break; 698 default: 699 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", 700 params_format(params)); 701 return -EINVAL; 702 } 703 writel(mod, i2s->addr + I2SMOD); 704 705 i2s->frmclk = params_rate(params); 706 707 return 0; 708 } 709 710 /* We set constraints on the substream acc to the version of I2S */ 711 static int i2s_startup(struct snd_pcm_substream *substream, 712 struct snd_soc_dai *dai) 713 { 714 struct i2s_dai *i2s = to_info(dai); 715 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 716 unsigned long flags; 717 718 spin_lock_irqsave(&lock, flags); 719 720 i2s->mode |= DAI_OPENED; 721 722 if (is_manager(other)) 723 i2s->mode &= ~DAI_MANAGER; 724 else 725 i2s->mode |= DAI_MANAGER; 726 727 /* Enforce set_sysclk in Master mode */ 728 i2s->rclk_srcrate = 0; 729 730 if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR)) 731 writel(CON_RSTCLR, i2s->addr + I2SCON); 732 733 spin_unlock_irqrestore(&lock, flags); 734 735 return 0; 736 } 737 738 static void i2s_shutdown(struct snd_pcm_substream *substream, 739 struct snd_soc_dai *dai) 740 { 741 struct i2s_dai *i2s = to_info(dai); 742 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 743 unsigned long flags; 744 745 spin_lock_irqsave(&lock, flags); 746 747 i2s->mode &= ~DAI_OPENED; 748 i2s->mode &= ~DAI_MANAGER; 749 750 if (is_opened(other)) 751 other->mode |= DAI_MANAGER; 752 753 /* Reset any constraint on RFS and BFS */ 754 i2s->rfs = 0; 755 i2s->bfs = 0; 756 757 spin_unlock_irqrestore(&lock, flags); 758 759 /* Gate CDCLK by default */ 760 if (!is_opened(other)) 761 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 762 0, SND_SOC_CLOCK_IN); 763 } 764 765 static int config_setup(struct i2s_dai *i2s) 766 { 767 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 768 unsigned rfs, bfs, blc; 769 u32 psr; 770 771 blc = get_blc(i2s); 772 773 bfs = i2s->bfs; 774 775 if (!bfs && other) 776 bfs = other->bfs; 777 778 /* Select least possible multiple(2) if no constraint set */ 779 if (!bfs) 780 bfs = blc * 2; 781 782 rfs = i2s->rfs; 783 784 if (!rfs && other) 785 rfs = other->rfs; 786 787 if ((rfs == 256 || rfs == 512) && (blc == 24)) { 788 dev_err(&i2s->pdev->dev, 789 "%d-RFS not supported for 24-blc\n", rfs); 790 return -EINVAL; 791 } 792 793 if (!rfs) { 794 if (bfs == 16 || bfs == 32) 795 rfs = 256; 796 else 797 rfs = 384; 798 } 799 800 /* If already setup and running */ 801 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { 802 dev_err(&i2s->pdev->dev, 803 "%s:%d Other DAI busy\n", __func__, __LINE__); 804 return -EAGAIN; 805 } 806 807 set_bfs(i2s, bfs); 808 set_rfs(i2s, rfs); 809 810 /* Don't bother with PSR in Slave mode */ 811 if (is_slave(i2s)) 812 return 0; 813 814 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { 815 psr = i2s->rclk_srcrate / i2s->frmclk / rfs; 816 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); 817 dev_dbg(&i2s->pdev->dev, 818 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", 819 i2s->rclk_srcrate, psr, rfs, bfs); 820 } 821 822 return 0; 823 } 824 825 static int i2s_trigger(struct snd_pcm_substream *substream, 826 int cmd, struct snd_soc_dai *dai) 827 { 828 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); 829 struct snd_soc_pcm_runtime *rtd = substream->private_data; 830 struct i2s_dai *i2s = to_info(rtd->cpu_dai); 831 unsigned long flags; 832 833 switch (cmd) { 834 case SNDRV_PCM_TRIGGER_START: 835 case SNDRV_PCM_TRIGGER_RESUME: 836 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 837 local_irq_save(flags); 838 839 if (config_setup(i2s)) { 840 local_irq_restore(flags); 841 return -EINVAL; 842 } 843 844 if (capture) 845 i2s_rxctrl(i2s, 1); 846 else 847 i2s_txctrl(i2s, 1); 848 849 local_irq_restore(flags); 850 break; 851 case SNDRV_PCM_TRIGGER_STOP: 852 case SNDRV_PCM_TRIGGER_SUSPEND: 853 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 854 local_irq_save(flags); 855 856 if (capture) { 857 i2s_rxctrl(i2s, 0); 858 i2s_fifo(i2s, FIC_RXFLUSH); 859 } else { 860 i2s_txctrl(i2s, 0); 861 i2s_fifo(i2s, FIC_TXFLUSH); 862 } 863 864 local_irq_restore(flags); 865 break; 866 } 867 868 return 0; 869 } 870 871 static int i2s_set_clkdiv(struct snd_soc_dai *dai, 872 int div_id, int div) 873 { 874 struct i2s_dai *i2s = to_info(dai); 875 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 876 877 switch (div_id) { 878 case SAMSUNG_I2S_DIV_BCLK: 879 if ((any_active(i2s) && div && (get_bfs(i2s) != div)) 880 || (other && other->bfs && (other->bfs != div))) { 881 dev_err(&i2s->pdev->dev, 882 "%s:%d Other DAI busy\n", __func__, __LINE__); 883 return -EAGAIN; 884 } 885 i2s->bfs = div; 886 break; 887 default: 888 dev_err(&i2s->pdev->dev, 889 "Invalid clock divider(%d)\n", div_id); 890 return -EINVAL; 891 } 892 893 return 0; 894 } 895 896 static snd_pcm_sframes_t 897 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) 898 { 899 struct i2s_dai *i2s = to_info(dai); 900 u32 reg = readl(i2s->addr + I2SFIC); 901 snd_pcm_sframes_t delay; 902 903 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 904 delay = FIC_RXCOUNT(reg); 905 else if (is_secondary(i2s)) 906 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); 907 else 908 delay = FIC_TXCOUNT(reg); 909 910 return delay; 911 } 912 913 #ifdef CONFIG_PM 914 static int i2s_suspend(struct snd_soc_dai *dai) 915 { 916 struct i2s_dai *i2s = to_info(dai); 917 918 if (dai->active) { 919 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); 920 i2s->suspend_i2scon = readl(i2s->addr + I2SCON); 921 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); 922 } 923 924 return 0; 925 } 926 927 static int i2s_resume(struct snd_soc_dai *dai) 928 { 929 struct i2s_dai *i2s = to_info(dai); 930 931 if (dai->active) { 932 writel(i2s->suspend_i2scon, i2s->addr + I2SCON); 933 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); 934 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); 935 } 936 937 return 0; 938 } 939 #else 940 #define i2s_suspend NULL 941 #define i2s_resume NULL 942 #endif 943 944 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) 945 { 946 struct i2s_dai *i2s = to_info(dai); 947 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 948 949 if (other && other->clk) /* If this is probe on secondary */ 950 goto probe_exit; 951 952 i2s->addr = ioremap(i2s->base, 0x100); 953 if (i2s->addr == NULL) { 954 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); 955 return -ENXIO; 956 } 957 958 i2s->clk = clk_get(&i2s->pdev->dev, "iis"); 959 if (IS_ERR(i2s->clk)) { 960 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); 961 iounmap(i2s->addr); 962 return -ENOENT; 963 } 964 clk_prepare_enable(i2s->clk); 965 966 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture); 967 968 if (other) { 969 other->addr = i2s->addr; 970 other->clk = i2s->clk; 971 } 972 973 if (i2s->quirks & QUIRK_NEED_RSTCLR) 974 writel(CON_RSTCLR, i2s->addr + I2SCON); 975 976 if (i2s->quirks & QUIRK_SEC_DAI) 977 idma_reg_addr_init(i2s->addr, 978 i2s->sec_dai->idma_playback.dma_addr); 979 980 probe_exit: 981 /* Reset any constraint on RFS and BFS */ 982 i2s->rfs = 0; 983 i2s->bfs = 0; 984 i2s_txctrl(i2s, 0); 985 i2s_rxctrl(i2s, 0); 986 i2s_fifo(i2s, FIC_TXFLUSH); 987 i2s_fifo(other, FIC_TXFLUSH); 988 i2s_fifo(i2s, FIC_RXFLUSH); 989 990 /* Gate CDCLK by default */ 991 if (!is_opened(other)) 992 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 993 0, SND_SOC_CLOCK_IN); 994 995 return 0; 996 } 997 998 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) 999 { 1000 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); 1001 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 1002 1003 if (!other || !other->clk) { 1004 1005 if (i2s->quirks & QUIRK_NEED_RSTCLR) 1006 writel(0, i2s->addr + I2SCON); 1007 1008 clk_disable_unprepare(i2s->clk); 1009 clk_put(i2s->clk); 1010 1011 iounmap(i2s->addr); 1012 } 1013 1014 i2s->clk = NULL; 1015 1016 return 0; 1017 } 1018 1019 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { 1020 .trigger = i2s_trigger, 1021 .hw_params = i2s_hw_params, 1022 .set_fmt = i2s_set_fmt, 1023 .set_clkdiv = i2s_set_clkdiv, 1024 .set_sysclk = i2s_set_sysclk, 1025 .startup = i2s_startup, 1026 .shutdown = i2s_shutdown, 1027 .delay = i2s_delay, 1028 }; 1029 1030 static const struct snd_soc_component_driver samsung_i2s_component = { 1031 .name = "samsung-i2s", 1032 }; 1033 1034 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 1035 1036 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ 1037 SNDRV_PCM_FMTBIT_S16_LE | \ 1038 SNDRV_PCM_FMTBIT_S24_LE) 1039 1040 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) 1041 { 1042 struct i2s_dai *i2s; 1043 int ret; 1044 1045 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL); 1046 if (i2s == NULL) 1047 return NULL; 1048 1049 i2s->pdev = pdev; 1050 i2s->pri_dai = NULL; 1051 i2s->sec_dai = NULL; 1052 i2s->i2s_dai_drv.symmetric_rates = 1; 1053 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; 1054 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; 1055 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; 1056 i2s->i2s_dai_drv.suspend = i2s_suspend; 1057 i2s->i2s_dai_drv.resume = i2s_resume; 1058 i2s->i2s_dai_drv.playback.channels_min = 1; 1059 i2s->i2s_dai_drv.playback.channels_max = 2; 1060 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; 1061 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; 1062 1063 if (!sec) { 1064 i2s->i2s_dai_drv.capture.channels_min = 1; 1065 i2s->i2s_dai_drv.capture.channels_max = 2; 1066 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; 1067 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; 1068 dev_set_drvdata(&i2s->pdev->dev, i2s); 1069 } else { /* Create a new platform_device for Secondary */ 1070 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1); 1071 if (!i2s->pdev) 1072 return NULL; 1073 1074 i2s->pdev->dev.parent = &pdev->dev; 1075 1076 platform_set_drvdata(i2s->pdev, i2s); 1077 ret = platform_device_add(i2s->pdev); 1078 if (ret < 0) 1079 return NULL; 1080 } 1081 1082 return i2s; 1083 } 1084 1085 static const struct of_device_id exynos_i2s_match[]; 1086 1087 static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data( 1088 struct platform_device *pdev) 1089 { 1090 #ifdef CONFIG_OF 1091 if (pdev->dev.of_node) { 1092 const struct of_device_id *match; 1093 match = of_match_node(exynos_i2s_match, pdev->dev.of_node); 1094 return match->data; 1095 } else 1096 #endif 1097 return (struct samsung_i2s_dai_data *) 1098 platform_get_device_id(pdev)->driver_data; 1099 } 1100 1101 #ifdef CONFIG_PM_RUNTIME 1102 static int i2s_runtime_suspend(struct device *dev) 1103 { 1104 struct i2s_dai *i2s = dev_get_drvdata(dev); 1105 1106 clk_disable_unprepare(i2s->clk); 1107 1108 return 0; 1109 } 1110 1111 static int i2s_runtime_resume(struct device *dev) 1112 { 1113 struct i2s_dai *i2s = dev_get_drvdata(dev); 1114 1115 clk_prepare_enable(i2s->clk); 1116 1117 return 0; 1118 } 1119 #endif /* CONFIG_PM_RUNTIME */ 1120 1121 static int samsung_i2s_probe(struct platform_device *pdev) 1122 { 1123 struct i2s_dai *pri_dai, *sec_dai = NULL; 1124 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; 1125 struct samsung_i2s *i2s_cfg = NULL; 1126 struct resource *res; 1127 u32 regs_base, quirks = 0, idma_addr = 0; 1128 struct device_node *np = pdev->dev.of_node; 1129 const struct samsung_i2s_dai_data *i2s_dai_data; 1130 int ret = 0; 1131 1132 /* Call during Seconday interface registration */ 1133 i2s_dai_data = samsung_i2s_get_driver_data(pdev); 1134 1135 if (i2s_dai_data->dai_type == TYPE_SEC) { 1136 sec_dai = dev_get_drvdata(&pdev->dev); 1137 if (!sec_dai) { 1138 dev_err(&pdev->dev, "Unable to get drvdata\n"); 1139 return -EFAULT; 1140 } 1141 devm_snd_soc_register_component(&sec_dai->pdev->dev, 1142 &samsung_i2s_component, 1143 &sec_dai->i2s_dai_drv, 1); 1144 samsung_asoc_dma_platform_register(&pdev->dev); 1145 return 0; 1146 } 1147 1148 pri_dai = i2s_alloc_dai(pdev, false); 1149 if (!pri_dai) { 1150 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); 1151 return -ENOMEM; 1152 } 1153 1154 if (!np) { 1155 res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 1156 if (!res) { 1157 dev_err(&pdev->dev, 1158 "Unable to get I2S-TX dma resource\n"); 1159 return -ENXIO; 1160 } 1161 pri_dai->dma_playback.channel = res->start; 1162 1163 res = platform_get_resource(pdev, IORESOURCE_DMA, 1); 1164 if (!res) { 1165 dev_err(&pdev->dev, 1166 "Unable to get I2S-RX dma resource\n"); 1167 return -ENXIO; 1168 } 1169 pri_dai->dma_capture.channel = res->start; 1170 1171 if (i2s_pdata == NULL) { 1172 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); 1173 return -EINVAL; 1174 } 1175 1176 if (&i2s_pdata->type) 1177 i2s_cfg = &i2s_pdata->type.i2s; 1178 1179 if (i2s_cfg) { 1180 quirks = i2s_cfg->quirks; 1181 idma_addr = i2s_cfg->idma_addr; 1182 } 1183 } else { 1184 quirks = i2s_dai_data->quirks; 1185 if (of_property_read_u32(np, "samsung,idma-addr", 1186 &idma_addr)) { 1187 if (quirks & QUIRK_SEC_DAI) { 1188 dev_err(&pdev->dev, "idma address is not"\ 1189 "specified"); 1190 return -EINVAL; 1191 } 1192 } 1193 } 1194 1195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1196 if (!res) { 1197 dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); 1198 return -ENXIO; 1199 } 1200 1201 if (!request_mem_region(res->start, resource_size(res), 1202 "samsung-i2s")) { 1203 dev_err(&pdev->dev, "Unable to request SFR region\n"); 1204 return -EBUSY; 1205 } 1206 regs_base = res->start; 1207 1208 pri_dai->dma_playback.dma_addr = regs_base + I2STXD; 1209 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; 1210 pri_dai->dma_playback.client = 1211 (struct s3c2410_dma_client *)&pri_dai->dma_playback; 1212 pri_dai->dma_playback.ch_name = "tx"; 1213 pri_dai->dma_capture.client = 1214 (struct s3c2410_dma_client *)&pri_dai->dma_capture; 1215 pri_dai->dma_capture.ch_name = "rx"; 1216 pri_dai->dma_playback.dma_size = 4; 1217 pri_dai->dma_capture.dma_size = 4; 1218 pri_dai->base = regs_base; 1219 pri_dai->quirks = quirks; 1220 1221 if (quirks & QUIRK_PRI_6CHAN) 1222 pri_dai->i2s_dai_drv.playback.channels_max = 6; 1223 1224 if (quirks & QUIRK_SEC_DAI) { 1225 sec_dai = i2s_alloc_dai(pdev, true); 1226 if (!sec_dai) { 1227 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); 1228 ret = -ENOMEM; 1229 goto err; 1230 } 1231 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; 1232 sec_dai->dma_playback.client = 1233 (struct s3c2410_dma_client *)&sec_dai->dma_playback; 1234 sec_dai->dma_playback.ch_name = "tx-sec"; 1235 1236 if (!np) { 1237 res = platform_get_resource(pdev, IORESOURCE_DMA, 2); 1238 if (res) 1239 sec_dai->dma_playback.channel = res->start; 1240 } 1241 1242 sec_dai->dma_playback.dma_size = 4; 1243 sec_dai->base = regs_base; 1244 sec_dai->quirks = quirks; 1245 sec_dai->idma_playback.dma_addr = idma_addr; 1246 sec_dai->pri_dai = pri_dai; 1247 pri_dai->sec_dai = sec_dai; 1248 } 1249 1250 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { 1251 dev_err(&pdev->dev, "Unable to configure gpio\n"); 1252 ret = -EINVAL; 1253 goto err; 1254 } 1255 1256 devm_snd_soc_register_component(&pri_dai->pdev->dev, 1257 &samsung_i2s_component, 1258 &pri_dai->i2s_dai_drv, 1); 1259 1260 pm_runtime_enable(&pdev->dev); 1261 1262 samsung_asoc_dma_platform_register(&pdev->dev); 1263 1264 return 0; 1265 err: 1266 release_mem_region(regs_base, resource_size(res)); 1267 1268 return ret; 1269 } 1270 1271 static int samsung_i2s_remove(struct platform_device *pdev) 1272 { 1273 struct i2s_dai *i2s, *other; 1274 struct resource *res; 1275 1276 i2s = dev_get_drvdata(&pdev->dev); 1277 other = i2s->pri_dai ? : i2s->sec_dai; 1278 1279 if (other) { 1280 other->pri_dai = NULL; 1281 other->sec_dai = NULL; 1282 } else { 1283 pm_runtime_disable(&pdev->dev); 1284 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1285 if (res) 1286 release_mem_region(res->start, resource_size(res)); 1287 } 1288 1289 i2s->pri_dai = NULL; 1290 i2s->sec_dai = NULL; 1291 1292 samsung_asoc_dma_platform_unregister(&pdev->dev); 1293 1294 return 0; 1295 } 1296 1297 static const struct samsung_i2s_dai_data i2sv3_dai_type = { 1298 .dai_type = TYPE_PRI, 1299 .quirks = QUIRK_NO_MUXPSR, 1300 }; 1301 1302 static const struct samsung_i2s_dai_data i2sv5_dai_type = { 1303 .dai_type = TYPE_PRI, 1304 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR, 1305 }; 1306 1307 static const struct samsung_i2s_dai_data i2sv6_dai_type = { 1308 .dai_type = TYPE_PRI, 1309 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | 1310 QUIRK_SUPPORTS_TDM, 1311 }; 1312 1313 static const struct samsung_i2s_dai_data samsung_dai_type_pri = { 1314 .dai_type = TYPE_PRI, 1315 }; 1316 1317 static const struct samsung_i2s_dai_data samsung_dai_type_sec = { 1318 .dai_type = TYPE_SEC, 1319 }; 1320 1321 static struct platform_device_id samsung_i2s_driver_ids[] = { 1322 { 1323 .name = "samsung-i2s", 1324 .driver_data = (kernel_ulong_t)&samsung_dai_type_pri, 1325 }, { 1326 .name = "samsung-i2s-sec", 1327 .driver_data = (kernel_ulong_t)&samsung_dai_type_sec, 1328 }, 1329 {}, 1330 }; 1331 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids); 1332 1333 #ifdef CONFIG_OF 1334 static const struct of_device_id exynos_i2s_match[] = { 1335 { 1336 .compatible = "samsung,s3c6410-i2s", 1337 .data = &i2sv3_dai_type, 1338 }, { 1339 .compatible = "samsung,s5pv210-i2s", 1340 .data = &i2sv5_dai_type, 1341 }, { 1342 .compatible = "samsung,exynos5420-i2s", 1343 .data = &i2sv6_dai_type, 1344 }, 1345 {}, 1346 }; 1347 MODULE_DEVICE_TABLE(of, exynos_i2s_match); 1348 #endif 1349 1350 static const struct dev_pm_ops samsung_i2s_pm = { 1351 SET_RUNTIME_PM_OPS(i2s_runtime_suspend, 1352 i2s_runtime_resume, NULL) 1353 }; 1354 1355 static struct platform_driver samsung_i2s_driver = { 1356 .probe = samsung_i2s_probe, 1357 .remove = samsung_i2s_remove, 1358 .id_table = samsung_i2s_driver_ids, 1359 .driver = { 1360 .name = "samsung-i2s", 1361 .owner = THIS_MODULE, 1362 .of_match_table = of_match_ptr(exynos_i2s_match), 1363 .pm = &samsung_i2s_pm, 1364 }, 1365 }; 1366 1367 module_platform_driver(samsung_i2s_driver); 1368 1369 /* Module information */ 1370 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>"); 1371 MODULE_DESCRIPTION("Samsung I2S Interface"); 1372 MODULE_ALIAS("platform:samsung-i2s"); 1373 MODULE_LICENSE("GPL"); 1374