linux/sound/soc/samsung/i2s.c
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   1// SPDX-License-Identifier: GPL-2.0
   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#include <dt-bindings/sound/samsung-i2s.h>
   9#include <linux/delay.h>
  10#include <linux/slab.h>
  11#include <linux/clk.h>
  12#include <linux/clk-provider.h>
  13#include <linux/io.h>
  14#include <linux/module.h>
  15#include <linux/of.h>
  16#include <linux/of_device.h>
  17#include <linux/of_gpio.h>
  18#include <linux/pm_runtime.h>
  19
  20#include <sound/soc.h>
  21#include <sound/pcm_params.h>
  22
  23#include <linux/platform_data/asoc-s3c.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#define SAMSUNG_I2S_ID_PRIMARY          1
  33#define SAMSUNG_I2S_ID_SECONDARY        2
  34
  35struct samsung_i2s_variant_regs {
  36        unsigned int    bfs_off;
  37        unsigned int    rfs_off;
  38        unsigned int    sdf_off;
  39        unsigned int    txr_off;
  40        unsigned int    rclksrc_off;
  41        unsigned int    mss_off;
  42        unsigned int    cdclkcon_off;
  43        unsigned int    lrp_off;
  44        unsigned int    bfs_mask;
  45        unsigned int    rfs_mask;
  46        unsigned int    ftx0cnt_off;
  47};
  48
  49struct samsung_i2s_dai_data {
  50        u32 quirks;
  51        unsigned int pcm_rates;
  52        const struct samsung_i2s_variant_regs *i2s_variant_regs;
  53};
  54
  55struct i2s_dai {
  56        /* Platform device for this DAI */
  57        struct platform_device *pdev;
  58
  59        /* Frame clock */
  60        unsigned frmclk;
  61        /*
  62         * Specifically requested RCLK, BCLK by machine driver.
  63         * 0 indicates CPU driver is free to choose any value.
  64         */
  65        unsigned rfs, bfs;
  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
  71#define DAI_OPENED      (1 << 0) /* DAI is opened */
  72#define DAI_MANAGER     (1 << 1) /* DAI is the manager */
  73        unsigned mode;
  74
  75        /* Driver for this DAI */
  76        struct snd_soc_dai_driver *drv;
  77
  78        /* DMA parameters */
  79        struct snd_dmaengine_dai_dma_data dma_playback;
  80        struct snd_dmaengine_dai_dma_data dma_capture;
  81        struct snd_dmaengine_dai_dma_data idma_playback;
  82        dma_filter_fn filter;
  83
  84        struct samsung_i2s_priv *priv;
  85};
  86
  87struct samsung_i2s_priv {
  88        struct platform_device *pdev;
  89        struct platform_device *pdev_sec;
  90
  91        /* Lock for cross interface checks */
  92        spinlock_t pcm_lock;
  93
  94        /* CPU DAIs and their corresponding drivers */
  95        struct i2s_dai *dai;
  96        struct snd_soc_dai_driver *dai_drv;
  97        int num_dais;
  98
  99        /* The I2S controller's core clock */
 100        struct clk *clk;
 101
 102        /* Clock for generating I2S signals */
 103        struct clk *op_clk;
 104
 105        /* Rate of RCLK source clock */
 106        unsigned long rclk_srcrate;
 107
 108        /* Cache of selected I2S registers for system suspend */
 109        u32 suspend_i2smod;
 110        u32 suspend_i2scon;
 111        u32 suspend_i2spsr;
 112
 113        const struct samsung_i2s_variant_regs *variant_regs;
 114        u32 quirks;
 115
 116        /* The clock provider's data */
 117        struct clk *clk_table[3];
 118        struct clk_onecell_data clk_data;
 119
 120        /* Spinlock protecting member fields below */
 121        spinlock_t lock;
 122
 123        /* Memory mapped SFR region */
 124        void __iomem *addr;
 125
 126        /* A flag indicating the I2S slave mode operation */
 127        bool slave_mode;
 128};
 129
 130/* Returns true if this is the 'overlay' stereo DAI */
 131static inline bool is_secondary(struct i2s_dai *i2s)
 132{
 133        return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY;
 134}
 135
 136/* If this interface of the controller is transmitting data */
 137static inline bool tx_active(struct i2s_dai *i2s)
 138{
 139        u32 active;
 140
 141        if (!i2s)
 142                return false;
 143
 144        active = readl(i2s->priv->addr + I2SCON);
 145
 146        if (is_secondary(i2s))
 147                active &= CON_TXSDMA_ACTIVE;
 148        else
 149                active &= CON_TXDMA_ACTIVE;
 150
 151        return active ? true : false;
 152}
 153
 154/* Return pointer to the other DAI */
 155static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
 156{
 157        return i2s->pri_dai ? : i2s->sec_dai;
 158}
 159
 160/* If the other interface of the controller is transmitting data */
 161static inline bool other_tx_active(struct i2s_dai *i2s)
 162{
 163        struct i2s_dai *other = get_other_dai(i2s);
 164
 165        return tx_active(other);
 166}
 167
 168/* If any interface of the controller is transmitting data */
 169static inline bool any_tx_active(struct i2s_dai *i2s)
 170{
 171        return tx_active(i2s) || other_tx_active(i2s);
 172}
 173
 174/* If this interface of the controller is receiving data */
 175static inline bool rx_active(struct i2s_dai *i2s)
 176{
 177        u32 active;
 178
 179        if (!i2s)
 180                return false;
 181
 182        active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE;
 183
 184        return active ? true : false;
 185}
 186
 187/* If the other interface of the controller is receiving data */
 188static inline bool other_rx_active(struct i2s_dai *i2s)
 189{
 190        struct i2s_dai *other = get_other_dai(i2s);
 191
 192        return rx_active(other);
 193}
 194
 195/* If any interface of the controller is receiving data */
 196static inline bool any_rx_active(struct i2s_dai *i2s)
 197{
 198        return rx_active(i2s) || other_rx_active(i2s);
 199}
 200
 201/* If the other DAI is transmitting or receiving data */
 202static inline bool other_active(struct i2s_dai *i2s)
 203{
 204        return other_rx_active(i2s) || other_tx_active(i2s);
 205}
 206
 207/* If this DAI is transmitting or receiving data */
 208static inline bool this_active(struct i2s_dai *i2s)
 209{
 210        return tx_active(i2s) || rx_active(i2s);
 211}
 212
 213/* If the controller is active anyway */
 214static inline bool any_active(struct i2s_dai *i2s)
 215{
 216        return this_active(i2s) || other_active(i2s);
 217}
 218
 219static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 220{
 221        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 222
 223        return &priv->dai[dai->id - 1];
 224}
 225
 226static inline bool is_opened(struct i2s_dai *i2s)
 227{
 228        if (i2s && (i2s->mode & DAI_OPENED))
 229                return true;
 230        else
 231                return false;
 232}
 233
 234static inline bool is_manager(struct i2s_dai *i2s)
 235{
 236        if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 237                return true;
 238        else
 239                return false;
 240}
 241
 242/* Read RCLK of I2S (in multiples of LRCLK) */
 243static inline unsigned get_rfs(struct i2s_dai *i2s)
 244{
 245        struct samsung_i2s_priv *priv = i2s->priv;
 246        u32 rfs;
 247
 248        rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off;
 249        rfs &= priv->variant_regs->rfs_mask;
 250
 251        switch (rfs) {
 252        case 7: return 192;
 253        case 6: return 96;
 254        case 5: return 128;
 255        case 4: return 64;
 256        case 3: return 768;
 257        case 2: return 384;
 258        case 1: return 512;
 259        default: return 256;
 260        }
 261}
 262
 263/* Write RCLK of I2S (in multiples of LRCLK) */
 264static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 265{
 266        struct samsung_i2s_priv *priv = i2s->priv;
 267        u32 mod = readl(priv->addr + I2SMOD);
 268        int rfs_shift = priv->variant_regs->rfs_off;
 269
 270        mod &= ~(priv->variant_regs->rfs_mask << rfs_shift);
 271
 272        switch (rfs) {
 273        case 192:
 274                mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
 275                break;
 276        case 96:
 277                mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
 278                break;
 279        case 128:
 280                mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
 281                break;
 282        case 64:
 283                mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
 284                break;
 285        case 768:
 286                mod |= (MOD_RCLK_768FS << rfs_shift);
 287                break;
 288        case 512:
 289                mod |= (MOD_RCLK_512FS << rfs_shift);
 290                break;
 291        case 384:
 292                mod |= (MOD_RCLK_384FS << rfs_shift);
 293                break;
 294        default:
 295                mod |= (MOD_RCLK_256FS << rfs_shift);
 296                break;
 297        }
 298
 299        writel(mod, priv->addr + I2SMOD);
 300}
 301
 302/* Read bit-clock of I2S (in multiples of LRCLK) */
 303static inline unsigned get_bfs(struct i2s_dai *i2s)
 304{
 305        struct samsung_i2s_priv *priv = i2s->priv;
 306        u32 bfs;
 307
 308        bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off;
 309        bfs &= priv->variant_regs->bfs_mask;
 310
 311        switch (bfs) {
 312        case 8: return 256;
 313        case 7: return 192;
 314        case 6: return 128;
 315        case 5: return 96;
 316        case 4: return 64;
 317        case 3: return 24;
 318        case 2: return 16;
 319        case 1: return 48;
 320        default: return 32;
 321        }
 322}
 323
 324/* Write bit-clock of I2S (in multiples of LRCLK) */
 325static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 326{
 327        struct samsung_i2s_priv *priv = i2s->priv;
 328        u32 mod = readl(priv->addr + I2SMOD);
 329        int tdm = priv->quirks & QUIRK_SUPPORTS_TDM;
 330        int bfs_shift = priv->variant_regs->bfs_off;
 331
 332        /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
 333        if (!tdm && bfs > 48) {
 334                dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
 335                return;
 336        }
 337
 338        mod &= ~(priv->variant_regs->bfs_mask << bfs_shift);
 339
 340        switch (bfs) {
 341        case 48:
 342                mod |= (MOD_BCLK_48FS << bfs_shift);
 343                break;
 344        case 32:
 345                mod |= (MOD_BCLK_32FS << bfs_shift);
 346                break;
 347        case 24:
 348                mod |= (MOD_BCLK_24FS << bfs_shift);
 349                break;
 350        case 16:
 351                mod |= (MOD_BCLK_16FS << bfs_shift);
 352                break;
 353        case 64:
 354                mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
 355                break;
 356        case 96:
 357                mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
 358                break;
 359        case 128:
 360                mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
 361                break;
 362        case 192:
 363                mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
 364                break;
 365        case 256:
 366                mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
 367                break;
 368        default:
 369                dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 370                return;
 371        }
 372
 373        writel(mod, priv->addr + I2SMOD);
 374}
 375
 376/* Sample size */
 377static inline int get_blc(struct i2s_dai *i2s)
 378{
 379        int blc = readl(i2s->priv->addr + I2SMOD);
 380
 381        blc = (blc >> 13) & 0x3;
 382
 383        switch (blc) {
 384        case 2: return 24;
 385        case 1: return 8;
 386        default: return 16;
 387        }
 388}
 389
 390/* TX channel control */
 391static void i2s_txctrl(struct i2s_dai *i2s, int on)
 392{
 393        struct samsung_i2s_priv *priv = i2s->priv;
 394        void __iomem *addr = priv->addr;
 395        int txr_off = priv->variant_regs->txr_off;
 396        u32 con = readl(addr + I2SCON);
 397        u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 398
 399        if (on) {
 400                con |= CON_ACTIVE;
 401                con &= ~CON_TXCH_PAUSE;
 402
 403                if (is_secondary(i2s)) {
 404                        con |= CON_TXSDMA_ACTIVE;
 405                        con &= ~CON_TXSDMA_PAUSE;
 406                } else {
 407                        con |= CON_TXDMA_ACTIVE;
 408                        con &= ~CON_TXDMA_PAUSE;
 409                }
 410
 411                if (any_rx_active(i2s))
 412                        mod |= 2 << txr_off;
 413                else
 414                        mod |= 0 << txr_off;
 415        } else {
 416                if (is_secondary(i2s)) {
 417                        con |=  CON_TXSDMA_PAUSE;
 418                        con &= ~CON_TXSDMA_ACTIVE;
 419                } else {
 420                        con |=  CON_TXDMA_PAUSE;
 421                        con &= ~CON_TXDMA_ACTIVE;
 422                }
 423
 424                if (other_tx_active(i2s)) {
 425                        writel(con, addr + I2SCON);
 426                        return;
 427                }
 428
 429                con |=  CON_TXCH_PAUSE;
 430
 431                if (any_rx_active(i2s))
 432                        mod |= 1 << txr_off;
 433                else
 434                        con &= ~CON_ACTIVE;
 435        }
 436
 437        writel(mod, addr + I2SMOD);
 438        writel(con, addr + I2SCON);
 439}
 440
 441/* RX Channel Control */
 442static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 443{
 444        struct samsung_i2s_priv *priv = i2s->priv;
 445        void __iomem *addr = priv->addr;
 446        int txr_off = priv->variant_regs->txr_off;
 447        u32 con = readl(addr + I2SCON);
 448        u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 449
 450        if (on) {
 451                con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 452                con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 453
 454                if (any_tx_active(i2s))
 455                        mod |= 2 << txr_off;
 456                else
 457                        mod |= 1 << txr_off;
 458        } else {
 459                con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 460                con &= ~CON_RXDMA_ACTIVE;
 461
 462                if (any_tx_active(i2s))
 463                        mod |= 0 << txr_off;
 464                else
 465                        con &= ~CON_ACTIVE;
 466        }
 467
 468        writel(mod, addr + I2SMOD);
 469        writel(con, addr + I2SCON);
 470}
 471
 472/* Flush FIFO of an interface */
 473static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 474{
 475        void __iomem *fic;
 476        u32 val;
 477
 478        if (!i2s)
 479                return;
 480
 481        if (is_secondary(i2s))
 482                fic = i2s->priv->addr + I2SFICS;
 483        else
 484                fic = i2s->priv->addr + I2SFIC;
 485
 486        /* Flush the FIFO */
 487        writel(readl(fic) | flush, fic);
 488
 489        /* Be patient */
 490        val = msecs_to_loops(1) / 1000; /* 1 usec */
 491        while (--val)
 492                cpu_relax();
 493
 494        writel(readl(fic) & ~flush, fic);
 495}
 496
 497static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs,
 498                          int dir)
 499{
 500        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 501        struct i2s_dai *i2s = to_info(dai);
 502        struct i2s_dai *other = get_other_dai(i2s);
 503        const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs;
 504        unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
 505        unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
 506        u32 mod, mask, val = 0;
 507        unsigned long flags;
 508        int ret = 0;
 509
 510        pm_runtime_get_sync(dai->dev);
 511
 512        spin_lock_irqsave(&priv->lock, flags);
 513        mod = readl(priv->addr + I2SMOD);
 514        spin_unlock_irqrestore(&priv->lock, flags);
 515
 516        switch (clk_id) {
 517        case SAMSUNG_I2S_OPCLK:
 518                mask = MOD_OPCLK_MASK;
 519                val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
 520                break;
 521        case SAMSUNG_I2S_CDCLK:
 522                mask = 1 << i2s_regs->cdclkcon_off;
 523                /* Shouldn't matter in GATING(CLOCK_IN) mode */
 524                if (dir == SND_SOC_CLOCK_IN)
 525                        rfs = 0;
 526
 527                if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
 528                                (any_active(i2s) &&
 529                                (((dir == SND_SOC_CLOCK_IN)
 530                                        && !(mod & cdcon_mask)) ||
 531                                ((dir == SND_SOC_CLOCK_OUT)
 532                                        && (mod & cdcon_mask))))) {
 533                        dev_err(&i2s->pdev->dev,
 534                                "%s:%d Other DAI busy\n", __func__, __LINE__);
 535                        ret = -EAGAIN;
 536                        goto err;
 537                }
 538
 539                if (dir == SND_SOC_CLOCK_IN)
 540                        val = 1 << i2s_regs->cdclkcon_off;
 541
 542                i2s->rfs = rfs;
 543                break;
 544
 545        case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 546        case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 547                mask = 1 << i2s_regs->rclksrc_off;
 548
 549                if ((priv->quirks & QUIRK_NO_MUXPSR)
 550                                || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 551                        clk_id = 0;
 552                else
 553                        clk_id = 1;
 554
 555                if (!any_active(i2s)) {
 556                        if (priv->op_clk && !IS_ERR(priv->op_clk)) {
 557                                if ((clk_id && !(mod & rsrc_mask)) ||
 558                                        (!clk_id && (mod & rsrc_mask))) {
 559                                        clk_disable_unprepare(priv->op_clk);
 560                                        clk_put(priv->op_clk);
 561                                } else {
 562                                        priv->rclk_srcrate =
 563                                                clk_get_rate(priv->op_clk);
 564                                        goto done;
 565                                }
 566                        }
 567
 568                        if (clk_id)
 569                                priv->op_clk = clk_get(&i2s->pdev->dev,
 570                                                "i2s_opclk1");
 571                        else
 572                                priv->op_clk = clk_get(&i2s->pdev->dev,
 573                                                "i2s_opclk0");
 574
 575                        if (WARN_ON(IS_ERR(priv->op_clk))) {
 576                                ret = PTR_ERR(priv->op_clk);
 577                                priv->op_clk = NULL;
 578                                goto err;
 579                        }
 580
 581                        ret = clk_prepare_enable(priv->op_clk);
 582                        if (ret) {
 583                                clk_put(priv->op_clk);
 584                                priv->op_clk = NULL;
 585                                goto err;
 586                        }
 587                        priv->rclk_srcrate = clk_get_rate(priv->op_clk);
 588
 589                } else if ((!clk_id && (mod & rsrc_mask))
 590                                || (clk_id && !(mod & rsrc_mask))) {
 591                        dev_err(&i2s->pdev->dev,
 592                                "%s:%d Other DAI busy\n", __func__, __LINE__);
 593                        ret = -EAGAIN;
 594                        goto err;
 595                } else {
 596                        /* Call can't be on the active DAI */
 597                        goto done;
 598                }
 599
 600                if (clk_id == 1)
 601                        val = 1 << i2s_regs->rclksrc_off;
 602                break;
 603        default:
 604                dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 605                ret = -EINVAL;
 606                goto err;
 607        }
 608
 609        spin_lock_irqsave(&priv->lock, flags);
 610        mod = readl(priv->addr + I2SMOD);
 611        mod = (mod & ~mask) | val;
 612        writel(mod, priv->addr + I2SMOD);
 613        spin_unlock_irqrestore(&priv->lock, flags);
 614done:
 615        pm_runtime_put(dai->dev);
 616
 617        return 0;
 618err:
 619        pm_runtime_put(dai->dev);
 620        return ret;
 621}
 622
 623static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 624{
 625        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 626        struct i2s_dai *i2s = to_info(dai);
 627        int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
 628        u32 mod, tmp = 0;
 629        unsigned long flags;
 630
 631        lrp_shift = priv->variant_regs->lrp_off;
 632        sdf_shift = priv->variant_regs->sdf_off;
 633        mod_slave = 1 << priv->variant_regs->mss_off;
 634
 635        sdf_mask = MOD_SDF_MASK << sdf_shift;
 636        lrp_rlow = MOD_LR_RLOW << lrp_shift;
 637
 638        /* Format is priority */
 639        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 640        case SND_SOC_DAIFMT_RIGHT_J:
 641                tmp |= lrp_rlow;
 642                tmp |= (MOD_SDF_MSB << sdf_shift);
 643                break;
 644        case SND_SOC_DAIFMT_LEFT_J:
 645                tmp |= lrp_rlow;
 646                tmp |= (MOD_SDF_LSB << sdf_shift);
 647                break;
 648        case SND_SOC_DAIFMT_I2S:
 649                tmp |= (MOD_SDF_IIS << sdf_shift);
 650                break;
 651        default:
 652                dev_err(&i2s->pdev->dev, "Format not supported\n");
 653                return -EINVAL;
 654        }
 655
 656        /*
 657         * INV flag is relative to the FORMAT flag - if set it simply
 658         * flips the polarity specified by the Standard
 659         */
 660        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 661        case SND_SOC_DAIFMT_NB_NF:
 662                break;
 663        case SND_SOC_DAIFMT_NB_IF:
 664                if (tmp & lrp_rlow)
 665                        tmp &= ~lrp_rlow;
 666                else
 667                        tmp |= lrp_rlow;
 668                break;
 669        default:
 670                dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 671                return -EINVAL;
 672        }
 673
 674        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 675        case SND_SOC_DAIFMT_CBM_CFM:
 676                tmp |= mod_slave;
 677                break;
 678        case SND_SOC_DAIFMT_CBS_CFS:
 679                /*
 680                 * Set default source clock in Master mode, only when the
 681                 * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
 682                 * clock configuration assigned in DT is not overwritten.
 683                 */
 684                if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
 685                        i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 686                                                        0, SND_SOC_CLOCK_IN);
 687                break;
 688        default:
 689                dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 690                return -EINVAL;
 691        }
 692
 693        pm_runtime_get_sync(dai->dev);
 694        spin_lock_irqsave(&priv->lock, flags);
 695        mod = readl(priv->addr + I2SMOD);
 696        /*
 697         * Don't change the I2S mode if any controller is active on this
 698         * channel.
 699         */
 700        if (any_active(i2s) &&
 701                ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
 702                spin_unlock_irqrestore(&priv->lock, flags);
 703                pm_runtime_put(dai->dev);
 704                dev_err(&i2s->pdev->dev,
 705                                "%s:%d Other DAI busy\n", __func__, __LINE__);
 706                return -EAGAIN;
 707        }
 708
 709        mod &= ~(sdf_mask | lrp_rlow | mod_slave);
 710        mod |= tmp;
 711        writel(mod, priv->addr + I2SMOD);
 712        priv->slave_mode = (mod & mod_slave);
 713        spin_unlock_irqrestore(&priv->lock, flags);
 714        pm_runtime_put(dai->dev);
 715
 716        return 0;
 717}
 718
 719static int i2s_hw_params(struct snd_pcm_substream *substream,
 720        struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 721{
 722        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 723        struct i2s_dai *i2s = to_info(dai);
 724        u32 mod, mask = 0, val = 0;
 725        struct clk *rclksrc;
 726        unsigned long flags;
 727
 728        WARN_ON(!pm_runtime_active(dai->dev));
 729
 730        if (!is_secondary(i2s))
 731                mask |= (MOD_DC2_EN | MOD_DC1_EN);
 732
 733        switch (params_channels(params)) {
 734        case 6:
 735                val |= MOD_DC2_EN;
 736                fallthrough;
 737        case 4:
 738                val |= MOD_DC1_EN;
 739                break;
 740        case 2:
 741                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 742                        i2s->dma_playback.addr_width = 4;
 743                else
 744                        i2s->dma_capture.addr_width = 4;
 745                break;
 746        case 1:
 747                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 748                        i2s->dma_playback.addr_width = 2;
 749                else
 750                        i2s->dma_capture.addr_width = 2;
 751
 752                break;
 753        default:
 754                dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 755                                params_channels(params));
 756                return -EINVAL;
 757        }
 758
 759        if (is_secondary(i2s))
 760                mask |= MOD_BLCS_MASK;
 761        else
 762                mask |= MOD_BLCP_MASK;
 763
 764        if (is_manager(i2s))
 765                mask |= MOD_BLC_MASK;
 766
 767        switch (params_width(params)) {
 768        case 8:
 769                if (is_secondary(i2s))
 770                        val |= MOD_BLCS_8BIT;
 771                else
 772                        val |= MOD_BLCP_8BIT;
 773                if (is_manager(i2s))
 774                        val |= MOD_BLC_8BIT;
 775                break;
 776        case 16:
 777                if (is_secondary(i2s))
 778                        val |= MOD_BLCS_16BIT;
 779                else
 780                        val |= MOD_BLCP_16BIT;
 781                if (is_manager(i2s))
 782                        val |= MOD_BLC_16BIT;
 783                break;
 784        case 24:
 785                if (is_secondary(i2s))
 786                        val |= MOD_BLCS_24BIT;
 787                else
 788                        val |= MOD_BLCP_24BIT;
 789                if (is_manager(i2s))
 790                        val |= MOD_BLC_24BIT;
 791                break;
 792        default:
 793                dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 794                                params_format(params));
 795                return -EINVAL;
 796        }
 797
 798        spin_lock_irqsave(&priv->lock, flags);
 799        mod = readl(priv->addr + I2SMOD);
 800        mod = (mod & ~mask) | val;
 801        writel(mod, priv->addr + I2SMOD);
 802        spin_unlock_irqrestore(&priv->lock, flags);
 803
 804        snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 805
 806        i2s->frmclk = params_rate(params);
 807
 808        rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
 809        if (rclksrc && !IS_ERR(rclksrc))
 810                priv->rclk_srcrate = clk_get_rate(rclksrc);
 811
 812        return 0;
 813}
 814
 815/* We set constraints on the substream according to the version of I2S */
 816static int i2s_startup(struct snd_pcm_substream *substream,
 817          struct snd_soc_dai *dai)
 818{
 819        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 820        struct i2s_dai *i2s = to_info(dai);
 821        struct i2s_dai *other = get_other_dai(i2s);
 822        unsigned long flags;
 823
 824        pm_runtime_get_sync(dai->dev);
 825
 826        spin_lock_irqsave(&priv->pcm_lock, flags);
 827
 828        i2s->mode |= DAI_OPENED;
 829
 830        if (is_manager(other))
 831                i2s->mode &= ~DAI_MANAGER;
 832        else
 833                i2s->mode |= DAI_MANAGER;
 834
 835        if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR))
 836                writel(CON_RSTCLR, i2s->priv->addr + I2SCON);
 837
 838        spin_unlock_irqrestore(&priv->pcm_lock, flags);
 839
 840        return 0;
 841}
 842
 843static void i2s_shutdown(struct snd_pcm_substream *substream,
 844        struct snd_soc_dai *dai)
 845{
 846        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 847        struct i2s_dai *i2s = to_info(dai);
 848        struct i2s_dai *other = get_other_dai(i2s);
 849        unsigned long flags;
 850
 851        spin_lock_irqsave(&priv->pcm_lock, flags);
 852
 853        i2s->mode &= ~DAI_OPENED;
 854        i2s->mode &= ~DAI_MANAGER;
 855
 856        if (is_opened(other))
 857                other->mode |= DAI_MANAGER;
 858
 859        /* Reset any constraint on RFS and BFS */
 860        i2s->rfs = 0;
 861        i2s->bfs = 0;
 862
 863        spin_unlock_irqrestore(&priv->pcm_lock, flags);
 864
 865        pm_runtime_put(dai->dev);
 866}
 867
 868static int config_setup(struct i2s_dai *i2s)
 869{
 870        struct samsung_i2s_priv *priv = i2s->priv;
 871        struct i2s_dai *other = get_other_dai(i2s);
 872        unsigned rfs, bfs, blc;
 873        u32 psr;
 874
 875        blc = get_blc(i2s);
 876
 877        bfs = i2s->bfs;
 878
 879        if (!bfs && other)
 880                bfs = other->bfs;
 881
 882        /* Select least possible multiple(2) if no constraint set */
 883        if (!bfs)
 884                bfs = blc * 2;
 885
 886        rfs = i2s->rfs;
 887
 888        if (!rfs && other)
 889                rfs = other->rfs;
 890
 891        if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 892                dev_err(&i2s->pdev->dev,
 893                        "%d-RFS not supported for 24-blc\n", rfs);
 894                return -EINVAL;
 895        }
 896
 897        if (!rfs) {
 898                if (bfs == 16 || bfs == 32)
 899                        rfs = 256;
 900                else
 901                        rfs = 384;
 902        }
 903
 904        /* If already setup and running */
 905        if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 906                dev_err(&i2s->pdev->dev,
 907                                "%s:%d Other DAI busy\n", __func__, __LINE__);
 908                return -EAGAIN;
 909        }
 910
 911        set_bfs(i2s, bfs);
 912        set_rfs(i2s, rfs);
 913
 914        /* Don't bother with PSR in Slave mode */
 915        if (priv->slave_mode)
 916                return 0;
 917
 918        if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
 919                psr = priv->rclk_srcrate / i2s->frmclk / rfs;
 920                writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR);
 921                dev_dbg(&i2s->pdev->dev,
 922                        "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 923                                priv->rclk_srcrate, psr, rfs, bfs);
 924        }
 925
 926        return 0;
 927}
 928
 929static int i2s_trigger(struct snd_pcm_substream *substream,
 930        int cmd, struct snd_soc_dai *dai)
 931{
 932        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 933        int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 934        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 935        struct i2s_dai *i2s = to_info(asoc_rtd_to_cpu(rtd, 0));
 936        unsigned long flags;
 937
 938        switch (cmd) {
 939        case SNDRV_PCM_TRIGGER_START:
 940        case SNDRV_PCM_TRIGGER_RESUME:
 941        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 942                pm_runtime_get_sync(dai->dev);
 943                spin_lock_irqsave(&priv->lock, flags);
 944
 945                if (config_setup(i2s)) {
 946                        spin_unlock_irqrestore(&priv->lock, flags);
 947                        return -EINVAL;
 948                }
 949
 950                if (capture)
 951                        i2s_rxctrl(i2s, 1);
 952                else
 953                        i2s_txctrl(i2s, 1);
 954
 955                spin_unlock_irqrestore(&priv->lock, flags);
 956                break;
 957        case SNDRV_PCM_TRIGGER_STOP:
 958        case SNDRV_PCM_TRIGGER_SUSPEND:
 959        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 960                spin_lock_irqsave(&priv->lock, flags);
 961
 962                if (capture) {
 963                        i2s_rxctrl(i2s, 0);
 964                        i2s_fifo(i2s, FIC_RXFLUSH);
 965                } else {
 966                        i2s_txctrl(i2s, 0);
 967                        i2s_fifo(i2s, FIC_TXFLUSH);
 968                }
 969
 970                spin_unlock_irqrestore(&priv->lock, flags);
 971                pm_runtime_put(dai->dev);
 972                break;
 973        }
 974
 975        return 0;
 976}
 977
 978static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 979        int div_id, int div)
 980{
 981        struct i2s_dai *i2s = to_info(dai);
 982        struct i2s_dai *other = get_other_dai(i2s);
 983
 984        switch (div_id) {
 985        case SAMSUNG_I2S_DIV_BCLK:
 986                pm_runtime_get_sync(dai->dev);
 987                if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 988                        || (other && other->bfs && (other->bfs != div))) {
 989                        pm_runtime_put(dai->dev);
 990                        dev_err(&i2s->pdev->dev,
 991                                "%s:%d Other DAI busy\n", __func__, __LINE__);
 992                        return -EAGAIN;
 993                }
 994                i2s->bfs = div;
 995                pm_runtime_put(dai->dev);
 996                break;
 997        default:
 998                dev_err(&i2s->pdev->dev,
 999                        "Invalid clock divider(%d)\n", div_id);
1000                return -EINVAL;
1001        }
1002
1003        return 0;
1004}
1005
1006static snd_pcm_sframes_t
1007i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
1008{
1009        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1010        struct i2s_dai *i2s = to_info(dai);
1011        u32 reg = readl(priv->addr + I2SFIC);
1012        snd_pcm_sframes_t delay;
1013
1014        WARN_ON(!pm_runtime_active(dai->dev));
1015
1016        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1017                delay = FIC_RXCOUNT(reg);
1018        else if (is_secondary(i2s))
1019                delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS));
1020        else
1021                delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f;
1022
1023        return delay;
1024}
1025
1026#ifdef CONFIG_PM
1027static int i2s_suspend(struct snd_soc_component *component)
1028{
1029        return pm_runtime_force_suspend(component->dev);
1030}
1031
1032static int i2s_resume(struct snd_soc_component *component)
1033{
1034        return pm_runtime_force_resume(component->dev);
1035}
1036#else
1037#define i2s_suspend NULL
1038#define i2s_resume  NULL
1039#endif
1040
1041static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1042{
1043        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1044        struct i2s_dai *i2s = to_info(dai);
1045        struct i2s_dai *other = get_other_dai(i2s);
1046        unsigned long flags;
1047
1048        pm_runtime_get_sync(dai->dev);
1049
1050        if (is_secondary(i2s)) {
1051                /* If this is probe on the secondary DAI */
1052                snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL);
1053        } else {
1054                snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1055                                          &i2s->dma_capture);
1056
1057                if (priv->quirks & QUIRK_NEED_RSTCLR)
1058                        writel(CON_RSTCLR, priv->addr + I2SCON);
1059
1060                if (priv->quirks & QUIRK_SUPPORTS_IDMA)
1061                        idma_reg_addr_init(priv->addr,
1062                                           other->idma_playback.addr);
1063        }
1064
1065        /* Reset any constraint on RFS and BFS */
1066        i2s->rfs = 0;
1067        i2s->bfs = 0;
1068
1069        spin_lock_irqsave(&priv->lock, flags);
1070        i2s_txctrl(i2s, 0);
1071        i2s_rxctrl(i2s, 0);
1072        i2s_fifo(i2s, FIC_TXFLUSH);
1073        i2s_fifo(other, FIC_TXFLUSH);
1074        i2s_fifo(i2s, FIC_RXFLUSH);
1075        spin_unlock_irqrestore(&priv->lock, flags);
1076
1077        /* Gate CDCLK by default */
1078        if (!is_opened(other))
1079                i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1080                                0, SND_SOC_CLOCK_IN);
1081        pm_runtime_put(dai->dev);
1082
1083        return 0;
1084}
1085
1086static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1087{
1088        struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1089        struct i2s_dai *i2s = to_info(dai);
1090        unsigned long flags;
1091
1092        pm_runtime_get_sync(dai->dev);
1093
1094        if (!is_secondary(i2s)) {
1095                if (priv->quirks & QUIRK_NEED_RSTCLR) {
1096                        spin_lock_irqsave(&priv->lock, flags);
1097                        writel(0, priv->addr + I2SCON);
1098                        spin_unlock_irqrestore(&priv->lock, flags);
1099                }
1100        }
1101
1102        pm_runtime_put(dai->dev);
1103
1104        return 0;
1105}
1106
1107static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1108        .trigger = i2s_trigger,
1109        .hw_params = i2s_hw_params,
1110        .set_fmt = i2s_set_fmt,
1111        .set_clkdiv = i2s_set_clkdiv,
1112        .set_sysclk = i2s_set_sysclk,
1113        .startup = i2s_startup,
1114        .shutdown = i2s_shutdown,
1115        .delay = i2s_delay,
1116};
1117
1118static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = {
1119        /* Backend DAI  */
1120        SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0),
1121        SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0),
1122
1123        /* Playback Mixer */
1124        SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
1125};
1126
1127static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = {
1128        { "Playback Mixer", NULL, "Primary Playback" },
1129        { "Playback Mixer", NULL, "Secondary Playback" },
1130
1131        { "Mixer DAI TX", NULL, "Playback Mixer" },
1132        { "Primary Capture", NULL, "Mixer DAI RX" },
1133};
1134
1135static const struct snd_soc_component_driver samsung_i2s_component = {
1136        .name = "samsung-i2s",
1137
1138        .dapm_widgets = samsung_i2s_widgets,
1139        .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets),
1140
1141        .dapm_routes = samsung_i2s_dapm_routes,
1142        .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes),
1143
1144        .suspend = i2s_suspend,
1145        .resume = i2s_resume,
1146};
1147
1148#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
1149                          SNDRV_PCM_FMTBIT_S24_LE)
1150
1151static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1152                          const struct samsung_i2s_dai_data *i2s_dai_data,
1153                          int num_dais)
1154{
1155        static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1156        static const char *stream_names[] = { "Primary Playback",
1157                                              "Secondary Playback" };
1158        struct snd_soc_dai_driver *dai_drv;
1159        int i;
1160
1161        priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1162                                     sizeof(struct i2s_dai), GFP_KERNEL);
1163        if (!priv->dai)
1164                return -ENOMEM;
1165
1166        priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1167                                     sizeof(*dai_drv), GFP_KERNEL);
1168        if (!priv->dai_drv)
1169                return -ENOMEM;
1170
1171        for (i = 0; i < num_dais; i++) {
1172                dai_drv = &priv->dai_drv[i];
1173
1174                dai_drv->probe = samsung_i2s_dai_probe;
1175                dai_drv->remove = samsung_i2s_dai_remove;
1176
1177                dai_drv->symmetric_rate = 1;
1178                dai_drv->ops = &samsung_i2s_dai_ops;
1179
1180                dai_drv->playback.channels_min = 1;
1181                dai_drv->playback.channels_max = 2;
1182                dai_drv->playback.rates = i2s_dai_data->pcm_rates;
1183                dai_drv->playback.formats = SAMSUNG_I2S_FMTS;
1184                dai_drv->playback.stream_name = stream_names[i];
1185
1186                dai_drv->id = i + 1;
1187                dai_drv->name = dai_names[i];
1188
1189                priv->dai[i].drv = &priv->dai_drv[i];
1190                priv->dai[i].pdev = priv->pdev;
1191        }
1192
1193        /* Initialize capture only for the primary DAI */
1194        dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1];
1195
1196        dai_drv->capture.channels_min = 1;
1197        dai_drv->capture.channels_max = 2;
1198        dai_drv->capture.rates = i2s_dai_data->pcm_rates;
1199        dai_drv->capture.formats = SAMSUNG_I2S_FMTS;
1200        dai_drv->capture.stream_name = "Primary Capture";
1201
1202        return 0;
1203}
1204
1205#ifdef CONFIG_PM
1206static int i2s_runtime_suspend(struct device *dev)
1207{
1208        struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1209
1210        priv->suspend_i2smod = readl(priv->addr + I2SMOD);
1211        priv->suspend_i2scon = readl(priv->addr + I2SCON);
1212        priv->suspend_i2spsr = readl(priv->addr + I2SPSR);
1213
1214        clk_disable_unprepare(priv->op_clk);
1215        clk_disable_unprepare(priv->clk);
1216
1217        return 0;
1218}
1219
1220static int i2s_runtime_resume(struct device *dev)
1221{
1222        struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1223        int ret;
1224
1225        ret = clk_prepare_enable(priv->clk);
1226        if (ret)
1227                return ret;
1228
1229        if (priv->op_clk) {
1230                ret = clk_prepare_enable(priv->op_clk);
1231                if (ret) {
1232                        clk_disable_unprepare(priv->clk);
1233                        return ret;
1234                }
1235        }
1236
1237        writel(priv->suspend_i2scon, priv->addr + I2SCON);
1238        writel(priv->suspend_i2smod, priv->addr + I2SMOD);
1239        writel(priv->suspend_i2spsr, priv->addr + I2SPSR);
1240
1241        return 0;
1242}
1243#endif /* CONFIG_PM */
1244
1245static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1246{
1247        int i;
1248
1249        for (i = 0; i < priv->clk_data.clk_num; i++) {
1250                if (!IS_ERR(priv->clk_table[i]))
1251                        clk_unregister(priv->clk_table[i]);
1252        }
1253}
1254
1255static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1256{
1257        of_clk_del_provider(priv->pdev->dev.of_node);
1258        i2s_unregister_clocks(priv);
1259}
1260
1261
1262static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1263{
1264
1265        const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1266        const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1267        const char *p_names[2] = { NULL };
1268        struct device *dev = &priv->pdev->dev;
1269        const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs;
1270        const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1271        struct clk *rclksrc;
1272        int ret, i;
1273
1274        /* Register the clock provider only if it's expected in the DTB */
1275        if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1276                return 0;
1277
1278        /* Get the RCLKSRC mux clock parent clock names */
1279        for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1280                rclksrc = clk_get(dev, clk_name[i]);
1281                if (IS_ERR(rclksrc))
1282                        continue;
1283                p_names[i] = __clk_get_name(rclksrc);
1284                clk_put(rclksrc);
1285        }
1286
1287        for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1288                i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1289                                                dev_name(dev), i2s_clk_desc[i]);
1290                if (!i2s_clk_name[i])
1291                        return -ENOMEM;
1292        }
1293
1294        if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
1295                /* Activate the prescaler */
1296                u32 val = readl(priv->addr + I2SPSR);
1297                writel(val | PSR_PSREN, priv->addr + I2SPSR);
1298
1299                priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1300                                i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1301                                ARRAY_SIZE(p_names),
1302                                CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1303                                priv->addr + I2SMOD, reg_info->rclksrc_off,
1304                                1, 0, &priv->lock);
1305
1306                priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1307                                i2s_clk_name[CLK_I2S_RCLK_PSR],
1308                                i2s_clk_name[CLK_I2S_RCLK_SRC],
1309                                CLK_SET_RATE_PARENT,
1310                                priv->addr + I2SPSR, 8, 6, 0, &priv->lock);
1311
1312                p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1313                priv->clk_data.clk_num = 2;
1314        }
1315
1316        priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1317                                i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1318                                CLK_SET_RATE_PARENT,
1319                                priv->addr + I2SMOD, reg_info->cdclkcon_off,
1320                                CLK_GATE_SET_TO_DISABLE, &priv->lock);
1321
1322        priv->clk_data.clk_num += 1;
1323        priv->clk_data.clks = priv->clk_table;
1324
1325        ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1326                                  &priv->clk_data);
1327        if (ret < 0) {
1328                dev_err(dev, "failed to add clock provider: %d\n", ret);
1329                i2s_unregister_clocks(priv);
1330        }
1331
1332        return ret;
1333}
1334
1335/* Create platform device for the secondary PCM */
1336static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1337{
1338        struct platform_device *pdev_sec;
1339        const char *devname;
1340        int ret;
1341
1342        devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec",
1343                                 dev_name(&priv->pdev->dev));
1344        if (!devname)
1345                return -ENOMEM;
1346
1347        pdev_sec = platform_device_alloc(devname, -1);
1348        if (!pdev_sec)
1349                return -ENOMEM;
1350
1351        pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL);
1352
1353        ret = platform_device_add(pdev_sec);
1354        if (ret < 0) {
1355                platform_device_put(pdev_sec);
1356                return ret;
1357        }
1358
1359        ret = device_attach(&pdev_sec->dev);
1360        if (ret <= 0) {
1361                platform_device_unregister(priv->pdev_sec);
1362                dev_info(&pdev_sec->dev, "device_attach() failed\n");
1363                return ret;
1364        }
1365
1366        priv->pdev_sec = pdev_sec;
1367
1368        return 0;
1369}
1370
1371static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1372{
1373        platform_device_unregister(priv->pdev_sec);
1374        priv->pdev_sec = NULL;
1375}
1376
1377static int samsung_i2s_probe(struct platform_device *pdev)
1378{
1379        struct i2s_dai *pri_dai, *sec_dai = NULL;
1380        struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1381        u32 regs_base, idma_addr = 0;
1382        struct device_node *np = pdev->dev.of_node;
1383        const struct samsung_i2s_dai_data *i2s_dai_data;
1384        const struct platform_device_id *id;
1385        struct samsung_i2s_priv *priv;
1386        struct resource *res;
1387        int num_dais, ret;
1388
1389        if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
1390                i2s_dai_data = of_device_get_match_data(&pdev->dev);
1391        } else {
1392                id = platform_get_device_id(pdev);
1393
1394                /* Nothing to do if it is the secondary device probe */
1395                if (!id)
1396                        return 0;
1397
1398                i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data;
1399        }
1400
1401        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1402        if (!priv)
1403                return -ENOMEM;
1404
1405        if (np) {
1406                priv->quirks = i2s_dai_data->quirks;
1407        } else {
1408                if (!i2s_pdata) {
1409                        dev_err(&pdev->dev, "Missing platform data\n");
1410                        return -EINVAL;
1411                }
1412                priv->quirks = i2s_pdata->type.quirks;
1413        }
1414
1415        num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1;
1416        priv->pdev = pdev;
1417        priv->variant_regs = i2s_dai_data->i2s_variant_regs;
1418
1419        ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1420        if (ret < 0)
1421                return ret;
1422
1423        pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1424
1425        spin_lock_init(&priv->lock);
1426        spin_lock_init(&priv->pcm_lock);
1427
1428        if (!np) {
1429                pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1430                pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1431                pri_dai->filter = i2s_pdata->dma_filter;
1432
1433                idma_addr = i2s_pdata->type.idma_addr;
1434        } else {
1435                if (of_property_read_u32(np, "samsung,idma-addr",
1436                                         &idma_addr)) {
1437                        if (priv->quirks & QUIRK_SUPPORTS_IDMA) {
1438                                dev_info(&pdev->dev, "idma address is not"\
1439                                                "specified");
1440                        }
1441                }
1442        }
1443
1444        priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1445        if (IS_ERR(priv->addr))
1446                return PTR_ERR(priv->addr);
1447
1448        regs_base = res->start;
1449
1450        priv->clk = devm_clk_get(&pdev->dev, "iis");
1451        if (IS_ERR(priv->clk)) {
1452                dev_err(&pdev->dev, "Failed to get iis clock\n");
1453                return PTR_ERR(priv->clk);
1454        }
1455
1456        ret = clk_prepare_enable(priv->clk);
1457        if (ret != 0) {
1458                dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1459                return ret;
1460        }
1461        pri_dai->dma_playback.addr = regs_base + I2STXD;
1462        pri_dai->dma_capture.addr = regs_base + I2SRXD;
1463        pri_dai->dma_playback.chan_name = "tx";
1464        pri_dai->dma_capture.chan_name = "rx";
1465        pri_dai->dma_playback.addr_width = 4;
1466        pri_dai->dma_capture.addr_width = 4;
1467        pri_dai->priv = priv;
1468
1469        if (priv->quirks & QUIRK_PRI_6CHAN)
1470                pri_dai->drv->playback.channels_max = 6;
1471
1472        ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1473                                                 "tx", "rx", NULL);
1474        if (ret < 0)
1475                goto err_disable_clk;
1476
1477        if (priv->quirks & QUIRK_SEC_DAI) {
1478                sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1479
1480                sec_dai->dma_playback.addr = regs_base + I2STXDS;
1481                sec_dai->dma_playback.chan_name = "tx-sec";
1482
1483                if (!np) {
1484                        sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1485                        sec_dai->filter = i2s_pdata->dma_filter;
1486                }
1487
1488                sec_dai->dma_playback.addr_width = 4;
1489                sec_dai->idma_playback.addr = idma_addr;
1490                sec_dai->pri_dai = pri_dai;
1491                sec_dai->priv = priv;
1492                pri_dai->sec_dai = sec_dai;
1493
1494                ret = i2s_create_secondary_device(priv);
1495                if (ret < 0)
1496                        goto err_disable_clk;
1497
1498                ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1499                                                sec_dai->filter, "tx-sec", NULL,
1500                                                &pdev->dev);
1501                if (ret < 0)
1502                        goto err_del_sec;
1503
1504        }
1505
1506        if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1507                dev_err(&pdev->dev, "Unable to configure gpio\n");
1508                ret = -EINVAL;
1509                goto err_del_sec;
1510        }
1511
1512        dev_set_drvdata(&pdev->dev, priv);
1513
1514        ret = devm_snd_soc_register_component(&pdev->dev,
1515                                        &samsung_i2s_component,
1516                                        priv->dai_drv, num_dais);
1517        if (ret < 0)
1518                goto err_del_sec;
1519
1520        pm_runtime_set_active(&pdev->dev);
1521        pm_runtime_enable(&pdev->dev);
1522
1523        ret = i2s_register_clock_provider(priv);
1524        if (ret < 0)
1525                goto err_disable_pm;
1526
1527        priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1528
1529        return 0;
1530
1531err_disable_pm:
1532        pm_runtime_disable(&pdev->dev);
1533err_del_sec:
1534        i2s_delete_secondary_device(priv);
1535err_disable_clk:
1536        clk_disable_unprepare(priv->clk);
1537        return ret;
1538}
1539
1540static int samsung_i2s_remove(struct platform_device *pdev)
1541{
1542        struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1543
1544        /* The secondary device has no driver data assigned */
1545        if (!priv)
1546                return 0;
1547
1548        pm_runtime_get_sync(&pdev->dev);
1549        pm_runtime_disable(&pdev->dev);
1550
1551        i2s_unregister_clock_provider(priv);
1552        i2s_delete_secondary_device(priv);
1553        clk_disable_unprepare(priv->clk);
1554
1555        pm_runtime_put_noidle(&pdev->dev);
1556
1557        return 0;
1558}
1559
1560static const struct samsung_i2s_variant_regs i2sv3_regs = {
1561        .bfs_off = 1,
1562        .rfs_off = 3,
1563        .sdf_off = 5,
1564        .txr_off = 8,
1565        .rclksrc_off = 10,
1566        .mss_off = 11,
1567        .cdclkcon_off = 12,
1568        .lrp_off = 7,
1569        .bfs_mask = 0x3,
1570        .rfs_mask = 0x3,
1571        .ftx0cnt_off = 8,
1572};
1573
1574static const struct samsung_i2s_variant_regs i2sv6_regs = {
1575        .bfs_off = 0,
1576        .rfs_off = 4,
1577        .sdf_off = 6,
1578        .txr_off = 8,
1579        .rclksrc_off = 10,
1580        .mss_off = 11,
1581        .cdclkcon_off = 12,
1582        .lrp_off = 15,
1583        .bfs_mask = 0xf,
1584        .rfs_mask = 0x3,
1585        .ftx0cnt_off = 8,
1586};
1587
1588static const struct samsung_i2s_variant_regs i2sv7_regs = {
1589        .bfs_off = 0,
1590        .rfs_off = 4,
1591        .sdf_off = 7,
1592        .txr_off = 9,
1593        .rclksrc_off = 11,
1594        .mss_off = 12,
1595        .cdclkcon_off = 22,
1596        .lrp_off = 15,
1597        .bfs_mask = 0xf,
1598        .rfs_mask = 0x7,
1599        .ftx0cnt_off = 0,
1600};
1601
1602static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1603        .bfs_off = 0,
1604        .rfs_off = 3,
1605        .sdf_off = 6,
1606        .txr_off = 8,
1607        .rclksrc_off = 10,
1608        .mss_off = 11,
1609        .cdclkcon_off = 12,
1610        .lrp_off = 15,
1611        .bfs_mask = 0x7,
1612        .rfs_mask = 0x7,
1613        .ftx0cnt_off = 8,
1614};
1615
1616static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1617        .quirks = QUIRK_NO_MUXPSR,
1618        .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1619        .i2s_variant_regs = &i2sv3_regs,
1620};
1621
1622static const struct samsung_i2s_dai_data i2sv5_dai_type __maybe_unused = {
1623        .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1624                        QUIRK_SUPPORTS_IDMA,
1625        .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1626        .i2s_variant_regs = &i2sv3_regs,
1627};
1628
1629static const struct samsung_i2s_dai_data i2sv6_dai_type __maybe_unused = {
1630        .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1631                        QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1632        .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1633        .i2s_variant_regs = &i2sv6_regs,
1634};
1635
1636static const struct samsung_i2s_dai_data i2sv7_dai_type __maybe_unused = {
1637        .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1638                        QUIRK_SUPPORTS_TDM,
1639        .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1640        .i2s_variant_regs = &i2sv7_regs,
1641};
1642
1643static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 __maybe_unused = {
1644        .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1645        .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1646        .i2s_variant_regs = &i2sv5_i2s1_regs,
1647};
1648
1649static const struct platform_device_id samsung_i2s_driver_ids[] = {
1650        {
1651                .name           = "samsung-i2s",
1652                .driver_data    = (kernel_ulong_t)&i2sv3_dai_type,
1653        },
1654        {},
1655};
1656MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1657
1658#ifdef CONFIG_OF
1659static const struct of_device_id exynos_i2s_match[] = {
1660        {
1661                .compatible = "samsung,s3c6410-i2s",
1662                .data = &i2sv3_dai_type,
1663        }, {
1664                .compatible = "samsung,s5pv210-i2s",
1665                .data = &i2sv5_dai_type,
1666        }, {
1667                .compatible = "samsung,exynos5420-i2s",
1668                .data = &i2sv6_dai_type,
1669        }, {
1670                .compatible = "samsung,exynos7-i2s",
1671                .data = &i2sv7_dai_type,
1672        }, {
1673                .compatible = "samsung,exynos7-i2s1",
1674                .data = &i2sv5_dai_type_i2s1,
1675        },
1676        {},
1677};
1678MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1679#endif
1680
1681static const struct dev_pm_ops samsung_i2s_pm = {
1682        SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1683                                i2s_runtime_resume, NULL)
1684        SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1685                                     pm_runtime_force_resume)
1686};
1687
1688static struct platform_driver samsung_i2s_driver = {
1689        .probe  = samsung_i2s_probe,
1690        .remove = samsung_i2s_remove,
1691        .id_table = samsung_i2s_driver_ids,
1692        .driver = {
1693                .name = "samsung-i2s",
1694                .of_match_table = of_match_ptr(exynos_i2s_match),
1695                .pm = &samsung_i2s_pm,
1696        },
1697};
1698
1699module_platform_driver(samsung_i2s_driver);
1700
1701/* Module information */
1702MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1703MODULE_DESCRIPTION("Samsung I2S Interface");
1704MODULE_ALIAS("platform:samsung-i2s");
1705MODULE_LICENSE("GPL");
1706