linux/sound/soc/sh/fsi.c
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   1// SPDX-License-Identifier: GPL-2.0
   2//
   3// Fifo-attached Serial Interface (FSI) support for SH7724
   4//
   5// Copyright (C) 2009 Renesas Solutions Corp.
   6// Kuninori Morimoto <morimoto.kuninori@renesas.com>
   7//
   8// Based on ssi.c
   9// Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
  10
  11#include <linux/delay.h>
  12#include <linux/dma-mapping.h>
  13#include <linux/pm_runtime.h>
  14#include <linux/io.h>
  15#include <linux/of.h>
  16#include <linux/of_device.h>
  17#include <linux/scatterlist.h>
  18#include <linux/sh_dma.h>
  19#include <linux/slab.h>
  20#include <linux/module.h>
  21#include <linux/workqueue.h>
  22#include <sound/soc.h>
  23#include <sound/pcm_params.h>
  24#include <sound/sh_fsi.h>
  25
  26/* PortA/PortB register */
  27#define REG_DO_FMT      0x0000
  28#define REG_DOFF_CTL    0x0004
  29#define REG_DOFF_ST     0x0008
  30#define REG_DI_FMT      0x000C
  31#define REG_DIFF_CTL    0x0010
  32#define REG_DIFF_ST     0x0014
  33#define REG_CKG1        0x0018
  34#define REG_CKG2        0x001C
  35#define REG_DIDT        0x0020
  36#define REG_DODT        0x0024
  37#define REG_MUTE_ST     0x0028
  38#define REG_OUT_DMAC    0x002C
  39#define REG_OUT_SEL     0x0030
  40#define REG_IN_DMAC     0x0038
  41
  42/* master register */
  43#define MST_CLK_RST     0x0210
  44#define MST_SOFT_RST    0x0214
  45#define MST_FIFO_SZ     0x0218
  46
  47/* core register (depend on FSI version) */
  48#define A_MST_CTLR      0x0180
  49#define B_MST_CTLR      0x01A0
  50#define CPU_INT_ST      0x01F4
  51#define CPU_IEMSK       0x01F8
  52#define CPU_IMSK        0x01FC
  53#define INT_ST          0x0200
  54#define IEMSK           0x0204
  55#define IMSK            0x0208
  56
  57/* DO_FMT */
  58/* DI_FMT */
  59#define CR_BWS_MASK     (0x3 << 20) /* FSI2 */
  60#define CR_BWS_24       (0x0 << 20) /* FSI2 */
  61#define CR_BWS_16       (0x1 << 20) /* FSI2 */
  62#define CR_BWS_20       (0x2 << 20) /* FSI2 */
  63
  64#define CR_DTMD_PCM             (0x0 << 8) /* FSI2 */
  65#define CR_DTMD_SPDIF_PCM       (0x1 << 8) /* FSI2 */
  66#define CR_DTMD_SPDIF_STREAM    (0x2 << 8) /* FSI2 */
  67
  68#define CR_MONO         (0x0 << 4)
  69#define CR_MONO_D       (0x1 << 4)
  70#define CR_PCM          (0x2 << 4)
  71#define CR_I2S          (0x3 << 4)
  72#define CR_TDM          (0x4 << 4)
  73#define CR_TDM_D        (0x5 << 4)
  74
  75/* OUT_DMAC */
  76/* IN_DMAC */
  77#define VDMD_MASK       (0x3 << 4)
  78#define VDMD_FRONT      (0x0 << 4) /* Package in front */
  79#define VDMD_BACK       (0x1 << 4) /* Package in back */
  80#define VDMD_STREAM     (0x2 << 4) /* Stream mode(16bit * 2) */
  81
  82#define DMA_ON          (0x1 << 0)
  83
  84/* DOFF_CTL */
  85/* DIFF_CTL */
  86#define IRQ_HALF        0x00100000
  87#define FIFO_CLR        0x00000001
  88
  89/* DOFF_ST */
  90#define ERR_OVER        0x00000010
  91#define ERR_UNDER       0x00000001
  92#define ST_ERR          (ERR_OVER | ERR_UNDER)
  93
  94/* CKG1 */
  95#define ACKMD_MASK      0x00007000
  96#define BPFMD_MASK      0x00000700
  97#define DIMD            (1 << 4)
  98#define DOMD            (1 << 0)
  99
 100/* A/B MST_CTLR */
 101#define BP      (1 << 4)        /* Fix the signal of Biphase output */
 102#define SE      (1 << 0)        /* Fix the master clock */
 103
 104/* CLK_RST */
 105#define CRB     (1 << 4)
 106#define CRA     (1 << 0)
 107
 108/* IO SHIFT / MACRO */
 109#define BI_SHIFT        12
 110#define BO_SHIFT        8
 111#define AI_SHIFT        4
 112#define AO_SHIFT        0
 113#define AB_IO(param, shift)     (param << shift)
 114
 115/* SOFT_RST */
 116#define PBSR            (1 << 12) /* Port B Software Reset */
 117#define PASR            (1 <<  8) /* Port A Software Reset */
 118#define IR              (1 <<  4) /* Interrupt Reset */
 119#define FSISR           (1 <<  0) /* Software Reset */
 120
 121/* OUT_SEL (FSI2) */
 122#define DMMD            (1 << 4) /* SPDIF output timing 0: Biphase only */
 123                                 /*                     1: Biphase and serial */
 124
 125/* FIFO_SZ */
 126#define FIFO_SZ_MASK    0x7
 127
 128#define FSI_RATES SNDRV_PCM_RATE_8000_96000
 129
 130#define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 131
 132/*
 133 * bus options
 134 *
 135 * 0x000000BA
 136 *
 137 * A : sample widtht 16bit setting
 138 * B : sample widtht 24bit setting
 139 */
 140
 141#define SHIFT_16DATA            0
 142#define SHIFT_24DATA            4
 143
 144#define PACKAGE_24BITBUS_BACK           0
 145#define PACKAGE_24BITBUS_FRONT          1
 146#define PACKAGE_16BITBUS_STREAM         2
 147
 148#define BUSOP_SET(s, a) ((a) << SHIFT_ ## s ## DATA)
 149#define BUSOP_GET(s, a) (((a) >> SHIFT_ ## s ## DATA) & 0xF)
 150
 151/*
 152 * FSI driver use below type name for variable
 153 *
 154 * xxx_num      : number of data
 155 * xxx_pos      : position of data
 156 * xxx_capa     : capacity of data
 157 */
 158
 159/*
 160 *      period/frame/sample image
 161 *
 162 * ex) PCM (2ch)
 163 *
 164 * period pos                                      period pos
 165 *   [n]                                             [n + 1]
 166 *   |<-------------------- period--------------------->|
 167 * ==|============================================ ... =|==
 168 *   |                                                  |
 169 *   ||<-----  frame ----->|<------ frame ----->|  ...  |
 170 *   |+--------------------+--------------------+- ...  |
 171 *   ||[ sample ][ sample ]|[ sample ][ sample ]|  ...  |
 172 *   |+--------------------+--------------------+- ...  |
 173 * ==|============================================ ... =|==
 174 */
 175
 176/*
 177 *      FSI FIFO image
 178 *
 179 *      |            |
 180 *      |            |
 181 *      | [ sample ] |
 182 *      | [ sample ] |
 183 *      | [ sample ] |
 184 *      | [ sample ] |
 185 *              --> go to codecs
 186 */
 187
 188/*
 189 *      FSI clock
 190 *
 191 * FSIxCLK [CPG] (ick) -------> |
 192 *                              |-> FSI_DIV (div)-> FSI2
 193 * FSIxCK [external] (xck) ---> |
 194 */
 195
 196/*
 197 *              struct
 198 */
 199
 200struct fsi_stream_handler;
 201struct fsi_stream {
 202
 203        /*
 204         * these are initialized by fsi_stream_init()
 205         */
 206        struct snd_pcm_substream *substream;
 207        int fifo_sample_capa;   /* sample capacity of FSI FIFO */
 208        int buff_sample_capa;   /* sample capacity of ALSA buffer */
 209        int buff_sample_pos;    /* sample position of ALSA buffer */
 210        int period_samples;     /* sample number / 1 period */
 211        int period_pos;         /* current period position */
 212        int sample_width;       /* sample width */
 213        int uerr_num;
 214        int oerr_num;
 215
 216        /*
 217         * bus options
 218         */
 219        u32 bus_option;
 220
 221        /*
 222         * thse are initialized by fsi_handler_init()
 223         */
 224        struct fsi_stream_handler *handler;
 225        struct fsi_priv         *priv;
 226
 227        /*
 228         * these are for DMAEngine
 229         */
 230        struct dma_chan         *chan;
 231        int                     dma_id;
 232};
 233
 234struct fsi_clk {
 235        /* see [FSI clock] */
 236        struct clk *own;
 237        struct clk *xck;
 238        struct clk *ick;
 239        struct clk *div;
 240        int (*set_rate)(struct device *dev,
 241                        struct fsi_priv *fsi);
 242
 243        unsigned long rate;
 244        unsigned int count;
 245};
 246
 247struct fsi_priv {
 248        void __iomem *base;
 249        phys_addr_t phys;
 250        struct fsi_master *master;
 251
 252        struct fsi_stream playback;
 253        struct fsi_stream capture;
 254
 255        struct fsi_clk clock;
 256
 257        u32 fmt;
 258
 259        int chan_num:16;
 260        unsigned int clk_master:1;
 261        unsigned int clk_cpg:1;
 262        unsigned int spdif:1;
 263        unsigned int enable_stream:1;
 264        unsigned int bit_clk_inv:1;
 265        unsigned int lr_clk_inv:1;
 266};
 267
 268struct fsi_stream_handler {
 269        int (*init)(struct fsi_priv *fsi, struct fsi_stream *io);
 270        int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io);
 271        int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev);
 272        int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
 273        int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
 274        int (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io,
 275                           int enable);
 276};
 277#define fsi_stream_handler_call(io, func, args...)      \
 278        (!(io) ? -ENODEV :                              \
 279         !((io)->handler->func) ? 0 :                   \
 280         (io)->handler->func(args))
 281
 282struct fsi_core {
 283        int ver;
 284
 285        u32 int_st;
 286        u32 iemsk;
 287        u32 imsk;
 288        u32 a_mclk;
 289        u32 b_mclk;
 290};
 291
 292struct fsi_master {
 293        void __iomem *base;
 294        struct fsi_priv fsia;
 295        struct fsi_priv fsib;
 296        const struct fsi_core *core;
 297        spinlock_t lock;
 298};
 299
 300static inline int fsi_stream_is_play(struct fsi_priv *fsi,
 301                                     struct fsi_stream *io)
 302{
 303        return &fsi->playback == io;
 304}
 305
 306
 307/*
 308 *              basic read write function
 309 */
 310
 311static void __fsi_reg_write(u32 __iomem *reg, u32 data)
 312{
 313        /* valid data area is 24bit */
 314        data &= 0x00ffffff;
 315
 316        __raw_writel(data, reg);
 317}
 318
 319static u32 __fsi_reg_read(u32 __iomem *reg)
 320{
 321        return __raw_readl(reg);
 322}
 323
 324static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
 325{
 326        u32 val = __fsi_reg_read(reg);
 327
 328        val &= ~mask;
 329        val |= data & mask;
 330
 331        __fsi_reg_write(reg, val);
 332}
 333
 334#define fsi_reg_write(p, r, d)\
 335        __fsi_reg_write((p->base + REG_##r), d)
 336
 337#define fsi_reg_read(p, r)\
 338        __fsi_reg_read((p->base + REG_##r))
 339
 340#define fsi_reg_mask_set(p, r, m, d)\
 341        __fsi_reg_mask_set((p->base + REG_##r), m, d)
 342
 343#define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
 344#define fsi_core_read(p, r)   _fsi_master_read(p, p->core->r)
 345static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
 346{
 347        u32 ret;
 348        unsigned long flags;
 349
 350        spin_lock_irqsave(&master->lock, flags);
 351        ret = __fsi_reg_read(master->base + reg);
 352        spin_unlock_irqrestore(&master->lock, flags);
 353
 354        return ret;
 355}
 356
 357#define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
 358#define fsi_core_mask_set(p, r, m, d)  _fsi_master_mask_set(p, p->core->r, m, d)
 359static void _fsi_master_mask_set(struct fsi_master *master,
 360                               u32 reg, u32 mask, u32 data)
 361{
 362        unsigned long flags;
 363
 364        spin_lock_irqsave(&master->lock, flags);
 365        __fsi_reg_mask_set(master->base + reg, mask, data);
 366        spin_unlock_irqrestore(&master->lock, flags);
 367}
 368
 369/*
 370 *              basic function
 371 */
 372static int fsi_version(struct fsi_master *master)
 373{
 374        return master->core->ver;
 375}
 376
 377static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
 378{
 379        return fsi->master;
 380}
 381
 382static int fsi_is_clk_master(struct fsi_priv *fsi)
 383{
 384        return fsi->clk_master;
 385}
 386
 387static int fsi_is_port_a(struct fsi_priv *fsi)
 388{
 389        return fsi->master->base == fsi->base;
 390}
 391
 392static int fsi_is_spdif(struct fsi_priv *fsi)
 393{
 394        return fsi->spdif;
 395}
 396
 397static int fsi_is_enable_stream(struct fsi_priv *fsi)
 398{
 399        return fsi->enable_stream;
 400}
 401
 402static int fsi_is_play(struct snd_pcm_substream *substream)
 403{
 404        return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 405}
 406
 407static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
 408{
 409        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 410
 411        return  rtd->cpu_dai;
 412}
 413
 414static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
 415{
 416        struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
 417
 418        if (dai->id == 0)
 419                return &master->fsia;
 420        else
 421                return &master->fsib;
 422}
 423
 424static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
 425{
 426        return fsi_get_priv_frm_dai(fsi_get_dai(substream));
 427}
 428
 429static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io)
 430{
 431        int is_play = fsi_stream_is_play(fsi, io);
 432        int is_porta = fsi_is_port_a(fsi);
 433        u32 shift;
 434
 435        if (is_porta)
 436                shift = is_play ? AO_SHIFT : AI_SHIFT;
 437        else
 438                shift = is_play ? BO_SHIFT : BI_SHIFT;
 439
 440        return shift;
 441}
 442
 443static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
 444{
 445        return frames * fsi->chan_num;
 446}
 447
 448static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
 449{
 450        return samples / fsi->chan_num;
 451}
 452
 453static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
 454                                        struct fsi_stream *io)
 455{
 456        int is_play = fsi_stream_is_play(fsi, io);
 457        u32 status;
 458        int frames;
 459
 460        status = is_play ?
 461                fsi_reg_read(fsi, DOFF_ST) :
 462                fsi_reg_read(fsi, DIFF_ST);
 463
 464        frames = 0x1ff & (status >> 8);
 465
 466        return fsi_frame2sample(fsi, frames);
 467}
 468
 469static void fsi_count_fifo_err(struct fsi_priv *fsi)
 470{
 471        u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
 472        u32 istatus = fsi_reg_read(fsi, DIFF_ST);
 473
 474        if (ostatus & ERR_OVER)
 475                fsi->playback.oerr_num++;
 476
 477        if (ostatus & ERR_UNDER)
 478                fsi->playback.uerr_num++;
 479
 480        if (istatus & ERR_OVER)
 481                fsi->capture.oerr_num++;
 482
 483        if (istatus & ERR_UNDER)
 484                fsi->capture.uerr_num++;
 485
 486        fsi_reg_write(fsi, DOFF_ST, 0);
 487        fsi_reg_write(fsi, DIFF_ST, 0);
 488}
 489
 490/*
 491 *              fsi_stream_xx() function
 492 */
 493static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
 494                                        struct snd_pcm_substream *substream)
 495{
 496        return fsi_is_play(substream) ? &fsi->playback : &fsi->capture;
 497}
 498
 499static int fsi_stream_is_working(struct fsi_priv *fsi,
 500                                 struct fsi_stream *io)
 501{
 502        struct fsi_master *master = fsi_get_master(fsi);
 503        unsigned long flags;
 504        int ret;
 505
 506        spin_lock_irqsave(&master->lock, flags);
 507        ret = !!(io->substream && io->substream->runtime);
 508        spin_unlock_irqrestore(&master->lock, flags);
 509
 510        return ret;
 511}
 512
 513static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
 514{
 515        return io->priv;
 516}
 517
 518static void fsi_stream_init(struct fsi_priv *fsi,
 519                            struct fsi_stream *io,
 520                            struct snd_pcm_substream *substream)
 521{
 522        struct snd_pcm_runtime *runtime = substream->runtime;
 523        struct fsi_master *master = fsi_get_master(fsi);
 524        unsigned long flags;
 525
 526        spin_lock_irqsave(&master->lock, flags);
 527        io->substream   = substream;
 528        io->buff_sample_capa    = fsi_frame2sample(fsi, runtime->buffer_size);
 529        io->buff_sample_pos     = 0;
 530        io->period_samples      = fsi_frame2sample(fsi, runtime->period_size);
 531        io->period_pos          = 0;
 532        io->sample_width        = samples_to_bytes(runtime, 1);
 533        io->bus_option          = 0;
 534        io->oerr_num    = -1; /* ignore 1st err */
 535        io->uerr_num    = -1; /* ignore 1st err */
 536        fsi_stream_handler_call(io, init, fsi, io);
 537        spin_unlock_irqrestore(&master->lock, flags);
 538}
 539
 540static void fsi_stream_quit(struct fsi_priv *fsi, struct fsi_stream *io)
 541{
 542        struct snd_soc_dai *dai = fsi_get_dai(io->substream);
 543        struct fsi_master *master = fsi_get_master(fsi);
 544        unsigned long flags;
 545
 546        spin_lock_irqsave(&master->lock, flags);
 547
 548        if (io->oerr_num > 0)
 549                dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
 550
 551        if (io->uerr_num > 0)
 552                dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
 553
 554        fsi_stream_handler_call(io, quit, fsi, io);
 555        io->substream   = NULL;
 556        io->buff_sample_capa    = 0;
 557        io->buff_sample_pos     = 0;
 558        io->period_samples      = 0;
 559        io->period_pos          = 0;
 560        io->sample_width        = 0;
 561        io->bus_option          = 0;
 562        io->oerr_num    = 0;
 563        io->uerr_num    = 0;
 564        spin_unlock_irqrestore(&master->lock, flags);
 565}
 566
 567static int fsi_stream_transfer(struct fsi_stream *io)
 568{
 569        struct fsi_priv *fsi = fsi_stream_to_priv(io);
 570        if (!fsi)
 571                return -EIO;
 572
 573        return fsi_stream_handler_call(io, transfer, fsi, io);
 574}
 575
 576#define fsi_stream_start(fsi, io)\
 577        fsi_stream_handler_call(io, start_stop, fsi, io, 1)
 578
 579#define fsi_stream_stop(fsi, io)\
 580        fsi_stream_handler_call(io, start_stop, fsi, io, 0)
 581
 582static int fsi_stream_probe(struct fsi_priv *fsi, struct device *dev)
 583{
 584        struct fsi_stream *io;
 585        int ret1, ret2;
 586
 587        io = &fsi->playback;
 588        ret1 = fsi_stream_handler_call(io, probe, fsi, io, dev);
 589
 590        io = &fsi->capture;
 591        ret2 = fsi_stream_handler_call(io, probe, fsi, io, dev);
 592
 593        if (ret1 < 0)
 594                return ret1;
 595        if (ret2 < 0)
 596                return ret2;
 597
 598        return 0;
 599}
 600
 601static int fsi_stream_remove(struct fsi_priv *fsi)
 602{
 603        struct fsi_stream *io;
 604        int ret1, ret2;
 605
 606        io = &fsi->playback;
 607        ret1 = fsi_stream_handler_call(io, remove, fsi, io);
 608
 609        io = &fsi->capture;
 610        ret2 = fsi_stream_handler_call(io, remove, fsi, io);
 611
 612        if (ret1 < 0)
 613                return ret1;
 614        if (ret2 < 0)
 615                return ret2;
 616
 617        return 0;
 618}
 619
 620/*
 621 *      format/bus/dma setting
 622 */
 623static void fsi_format_bus_setup(struct fsi_priv *fsi, struct fsi_stream *io,
 624                                 u32 bus, struct device *dev)
 625{
 626        struct fsi_master *master = fsi_get_master(fsi);
 627        int is_play = fsi_stream_is_play(fsi, io);
 628        u32 fmt = fsi->fmt;
 629
 630        if (fsi_version(master) >= 2) {
 631                u32 dma = 0;
 632
 633                /*
 634                 * FSI2 needs DMA/Bus setting
 635                 */
 636                switch (bus) {
 637                case PACKAGE_24BITBUS_FRONT:
 638                        fmt |= CR_BWS_24;
 639                        dma |= VDMD_FRONT;
 640                        dev_dbg(dev, "24bit bus / package in front\n");
 641                        break;
 642                case PACKAGE_16BITBUS_STREAM:
 643                        fmt |= CR_BWS_16;
 644                        dma |= VDMD_STREAM;
 645                        dev_dbg(dev, "16bit bus / stream mode\n");
 646                        break;
 647                case PACKAGE_24BITBUS_BACK:
 648                default:
 649                        fmt |= CR_BWS_24;
 650                        dma |= VDMD_BACK;
 651                        dev_dbg(dev, "24bit bus / package in back\n");
 652                        break;
 653                }
 654
 655                if (is_play)
 656                        fsi_reg_write(fsi, OUT_DMAC,    dma);
 657                else
 658                        fsi_reg_write(fsi, IN_DMAC,     dma);
 659        }
 660
 661        if (is_play)
 662                fsi_reg_write(fsi, DO_FMT, fmt);
 663        else
 664                fsi_reg_write(fsi, DI_FMT, fmt);
 665}
 666
 667/*
 668 *              irq function
 669 */
 670
 671static void fsi_irq_enable(struct fsi_priv *fsi, struct fsi_stream *io)
 672{
 673        u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
 674        struct fsi_master *master = fsi_get_master(fsi);
 675
 676        fsi_core_mask_set(master, imsk,  data, data);
 677        fsi_core_mask_set(master, iemsk, data, data);
 678}
 679
 680static void fsi_irq_disable(struct fsi_priv *fsi, struct fsi_stream *io)
 681{
 682        u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
 683        struct fsi_master *master = fsi_get_master(fsi);
 684
 685        fsi_core_mask_set(master, imsk,  data, 0);
 686        fsi_core_mask_set(master, iemsk, data, 0);
 687}
 688
 689static u32 fsi_irq_get_status(struct fsi_master *master)
 690{
 691        return fsi_core_read(master, int_st);
 692}
 693
 694static void fsi_irq_clear_status(struct fsi_priv *fsi)
 695{
 696        u32 data = 0;
 697        struct fsi_master *master = fsi_get_master(fsi);
 698
 699        data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback));
 700        data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture));
 701
 702        /* clear interrupt factor */
 703        fsi_core_mask_set(master, int_st, data, 0);
 704}
 705
 706/*
 707 *              SPDIF master clock function
 708 *
 709 * These functions are used later FSI2
 710 */
 711static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
 712{
 713        struct fsi_master *master = fsi_get_master(fsi);
 714        u32 mask, val;
 715
 716        mask = BP | SE;
 717        val = enable ? mask : 0;
 718
 719        fsi_is_port_a(fsi) ?
 720                fsi_core_mask_set(master, a_mclk, mask, val) :
 721                fsi_core_mask_set(master, b_mclk, mask, val);
 722}
 723
 724/*
 725 *              clock function
 726 */
 727static int fsi_clk_init(struct device *dev,
 728                        struct fsi_priv *fsi,
 729                        int xck,
 730                        int ick,
 731                        int div,
 732                        int (*set_rate)(struct device *dev,
 733                                        struct fsi_priv *fsi))
 734{
 735        struct fsi_clk *clock = &fsi->clock;
 736        int is_porta = fsi_is_port_a(fsi);
 737
 738        clock->xck      = NULL;
 739        clock->ick      = NULL;
 740        clock->div      = NULL;
 741        clock->rate     = 0;
 742        clock->count    = 0;
 743        clock->set_rate = set_rate;
 744
 745        clock->own = devm_clk_get(dev, NULL);
 746        if (IS_ERR(clock->own))
 747                return -EINVAL;
 748
 749        /* external clock */
 750        if (xck) {
 751                clock->xck = devm_clk_get(dev, is_porta ? "xcka" : "xckb");
 752                if (IS_ERR(clock->xck)) {
 753                        dev_err(dev, "can't get xck clock\n");
 754                        return -EINVAL;
 755                }
 756                if (clock->xck == clock->own) {
 757                        dev_err(dev, "cpu doesn't support xck clock\n");
 758                        return -EINVAL;
 759                }
 760        }
 761
 762        /* FSIACLK/FSIBCLK */
 763        if (ick) {
 764                clock->ick = devm_clk_get(dev,  is_porta ? "icka" : "ickb");
 765                if (IS_ERR(clock->ick)) {
 766                        dev_err(dev, "can't get ick clock\n");
 767                        return -EINVAL;
 768                }
 769                if (clock->ick == clock->own) {
 770                        dev_err(dev, "cpu doesn't support ick clock\n");
 771                        return -EINVAL;
 772                }
 773        }
 774
 775        /* FSI-DIV */
 776        if (div) {
 777                clock->div = devm_clk_get(dev,  is_porta ? "diva" : "divb");
 778                if (IS_ERR(clock->div)) {
 779                        dev_err(dev, "can't get div clock\n");
 780                        return -EINVAL;
 781                }
 782                if (clock->div == clock->own) {
 783                        dev_err(dev, "cpu doesn't support div clock\n");
 784                        return -EINVAL;
 785                }
 786        }
 787
 788        return 0;
 789}
 790
 791#define fsi_clk_invalid(fsi) fsi_clk_valid(fsi, 0)
 792static void fsi_clk_valid(struct fsi_priv *fsi, unsigned long rate)
 793{
 794        fsi->clock.rate = rate;
 795}
 796
 797static int fsi_clk_is_valid(struct fsi_priv *fsi)
 798{
 799        return  fsi->clock.set_rate &&
 800                fsi->clock.rate;
 801}
 802
 803static int fsi_clk_enable(struct device *dev,
 804                          struct fsi_priv *fsi)
 805{
 806        struct fsi_clk *clock = &fsi->clock;
 807        int ret = -EINVAL;
 808
 809        if (!fsi_clk_is_valid(fsi))
 810                return ret;
 811
 812        if (0 == clock->count) {
 813                ret = clock->set_rate(dev, fsi);
 814                if (ret < 0) {
 815                        fsi_clk_invalid(fsi);
 816                        return ret;
 817                }
 818
 819                clk_enable(clock->xck);
 820                clk_enable(clock->ick);
 821                clk_enable(clock->div);
 822
 823                clock->count++;
 824        }
 825
 826        return ret;
 827}
 828
 829static int fsi_clk_disable(struct device *dev,
 830                            struct fsi_priv *fsi)
 831{
 832        struct fsi_clk *clock = &fsi->clock;
 833
 834        if (!fsi_clk_is_valid(fsi))
 835                return -EINVAL;
 836
 837        if (1 == clock->count--) {
 838                clk_disable(clock->xck);
 839                clk_disable(clock->ick);
 840                clk_disable(clock->div);
 841        }
 842
 843        return 0;
 844}
 845
 846static int fsi_clk_set_ackbpf(struct device *dev,
 847                              struct fsi_priv *fsi,
 848                              int ackmd, int bpfmd)
 849{
 850        u32 data = 0;
 851
 852        /* check ackmd/bpfmd relationship */
 853        if (bpfmd > ackmd) {
 854                dev_err(dev, "unsupported rate (%d/%d)\n", ackmd, bpfmd);
 855                return -EINVAL;
 856        }
 857
 858        /*  ACKMD */
 859        switch (ackmd) {
 860        case 512:
 861                data |= (0x0 << 12);
 862                break;
 863        case 256:
 864                data |= (0x1 << 12);
 865                break;
 866        case 128:
 867                data |= (0x2 << 12);
 868                break;
 869        case 64:
 870                data |= (0x3 << 12);
 871                break;
 872        case 32:
 873                data |= (0x4 << 12);
 874                break;
 875        default:
 876                dev_err(dev, "unsupported ackmd (%d)\n", ackmd);
 877                return -EINVAL;
 878        }
 879
 880        /* BPFMD */
 881        switch (bpfmd) {
 882        case 32:
 883                data |= (0x0 << 8);
 884                break;
 885        case 64:
 886                data |= (0x1 << 8);
 887                break;
 888        case 128:
 889                data |= (0x2 << 8);
 890                break;
 891        case 256:
 892                data |= (0x3 << 8);
 893                break;
 894        case 512:
 895                data |= (0x4 << 8);
 896                break;
 897        case 16:
 898                data |= (0x7 << 8);
 899                break;
 900        default:
 901                dev_err(dev, "unsupported bpfmd (%d)\n", bpfmd);
 902                return -EINVAL;
 903        }
 904
 905        dev_dbg(dev, "ACKMD/BPFMD = %d/%d\n", ackmd, bpfmd);
 906
 907        fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
 908        udelay(10);
 909
 910        return 0;
 911}
 912
 913static int fsi_clk_set_rate_external(struct device *dev,
 914                                     struct fsi_priv *fsi)
 915{
 916        struct clk *xck = fsi->clock.xck;
 917        struct clk *ick = fsi->clock.ick;
 918        unsigned long rate = fsi->clock.rate;
 919        unsigned long xrate;
 920        int ackmd, bpfmd;
 921        int ret = 0;
 922
 923        /* check clock rate */
 924        xrate = clk_get_rate(xck);
 925        if (xrate % rate) {
 926                dev_err(dev, "unsupported clock rate\n");
 927                return -EINVAL;
 928        }
 929
 930        clk_set_parent(ick, xck);
 931        clk_set_rate(ick, xrate);
 932
 933        bpfmd = fsi->chan_num * 32;
 934        ackmd = xrate / rate;
 935
 936        dev_dbg(dev, "external/rate = %ld/%ld\n", xrate, rate);
 937
 938        ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
 939        if (ret < 0)
 940                dev_err(dev, "%s failed", __func__);
 941
 942        return ret;
 943}
 944
 945static int fsi_clk_set_rate_cpg(struct device *dev,
 946                                struct fsi_priv *fsi)
 947{
 948        struct clk *ick = fsi->clock.ick;
 949        struct clk *div = fsi->clock.div;
 950        unsigned long rate = fsi->clock.rate;
 951        unsigned long target = 0; /* 12288000 or 11289600 */
 952        unsigned long actual, cout;
 953        unsigned long diff, min;
 954        unsigned long best_cout, best_act;
 955        int adj;
 956        int ackmd, bpfmd;
 957        int ret = -EINVAL;
 958
 959        if (!(12288000 % rate))
 960                target = 12288000;
 961        if (!(11289600 % rate))
 962                target = 11289600;
 963        if (!target) {
 964                dev_err(dev, "unsupported rate\n");
 965                return ret;
 966        }
 967
 968        bpfmd = fsi->chan_num * 32;
 969        ackmd = target / rate;
 970        ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
 971        if (ret < 0) {
 972                dev_err(dev, "%s failed", __func__);
 973                return ret;
 974        }
 975
 976        /*
 977         * The clock flow is
 978         *
 979         * [CPG] = cout => [FSI_DIV] = audio => [FSI] => [codec]
 980         *
 981         * But, it needs to find best match of CPG and FSI_DIV
 982         * combination, since it is difficult to generate correct
 983         * frequency of audio clock from ick clock only.
 984         * Because ick is created from its parent clock.
 985         *
 986         * target       = rate x [512/256/128/64]fs
 987         * cout         = round(target x adjustment)
 988         * actual       = cout / adjustment (by FSI-DIV) ~= target
 989         * audio        = actual
 990         */
 991        min = ~0;
 992        best_cout = 0;
 993        best_act = 0;
 994        for (adj = 1; adj < 0xffff; adj++) {
 995
 996                cout = target * adj;
 997                if (cout > 100000000) /* max clock = 100MHz */
 998                        break;
 999
1000                /* cout/actual audio clock */
1001                cout    = clk_round_rate(ick, cout);
1002                actual  = cout / adj;
1003
1004                /* find best frequency */
1005                diff = abs(actual - target);
1006                if (diff < min) {
1007                        min             = diff;
1008                        best_cout       = cout;
1009                        best_act        = actual;
1010                }
1011        }
1012
1013        ret = clk_set_rate(ick, best_cout);
1014        if (ret < 0) {
1015                dev_err(dev, "ick clock failed\n");
1016                return -EIO;
1017        }
1018
1019        ret = clk_set_rate(div, clk_round_rate(div, best_act));
1020        if (ret < 0) {
1021                dev_err(dev, "div clock failed\n");
1022                return -EIO;
1023        }
1024
1025        dev_dbg(dev, "ick/div = %ld/%ld\n",
1026                clk_get_rate(ick), clk_get_rate(div));
1027
1028        return ret;
1029}
1030
1031static void fsi_pointer_update(struct fsi_stream *io, int size)
1032{
1033        io->buff_sample_pos += size;
1034
1035        if (io->buff_sample_pos >=
1036            io->period_samples * (io->period_pos + 1)) {
1037                struct snd_pcm_substream *substream = io->substream;
1038                struct snd_pcm_runtime *runtime = substream->runtime;
1039
1040                io->period_pos++;
1041
1042                if (io->period_pos >= runtime->periods) {
1043                        io->buff_sample_pos = 0;
1044                        io->period_pos = 0;
1045                }
1046
1047                snd_pcm_period_elapsed(substream);
1048        }
1049}
1050
1051/*
1052 *              pio data transfer handler
1053 */
1054static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples)
1055{
1056        int i;
1057
1058        if (fsi_is_enable_stream(fsi)) {
1059                /*
1060                 * stream mode
1061                 * see
1062                 *      fsi_pio_push_init()
1063                 */
1064                u32 *buf = (u32 *)_buf;
1065
1066                for (i = 0; i < samples / 2; i++)
1067                        fsi_reg_write(fsi, DODT, buf[i]);
1068        } else {
1069                /* normal mode */
1070                u16 *buf = (u16 *)_buf;
1071
1072                for (i = 0; i < samples; i++)
1073                        fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8));
1074        }
1075}
1076
1077static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples)
1078{
1079        u16 *buf = (u16 *)_buf;
1080        int i;
1081
1082        for (i = 0; i < samples; i++)
1083                *(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
1084}
1085
1086static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples)
1087{
1088        u32 *buf = (u32 *)_buf;
1089        int i;
1090
1091        for (i = 0; i < samples; i++)
1092                fsi_reg_write(fsi, DODT, *(buf + i));
1093}
1094
1095static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples)
1096{
1097        u32 *buf = (u32 *)_buf;
1098        int i;
1099
1100        for (i = 0; i < samples; i++)
1101                *(buf + i) = fsi_reg_read(fsi, DIDT);
1102}
1103
1104static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io)
1105{
1106        struct snd_pcm_runtime *runtime = io->substream->runtime;
1107
1108        return runtime->dma_area +
1109                samples_to_bytes(runtime, io->buff_sample_pos);
1110}
1111
1112static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io,
1113                void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples),
1114                void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples),
1115                int samples)
1116{
1117        u8 *buf;
1118
1119        if (!fsi_stream_is_working(fsi, io))
1120                return -EINVAL;
1121
1122        buf = fsi_pio_get_area(fsi, io);
1123
1124        switch (io->sample_width) {
1125        case 2:
1126                run16(fsi, buf, samples);
1127                break;
1128        case 4:
1129                run32(fsi, buf, samples);
1130                break;
1131        default:
1132                return -EINVAL;
1133        }
1134
1135        fsi_pointer_update(io, samples);
1136
1137        return 0;
1138}
1139
1140static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io)
1141{
1142        int sample_residues;    /* samples in FSI fifo */
1143        int sample_space;       /* ALSA free samples space */
1144        int samples;
1145
1146        sample_residues = fsi_get_current_fifo_samples(fsi, io);
1147        sample_space    = io->buff_sample_capa - io->buff_sample_pos;
1148
1149        samples = min(sample_residues, sample_space);
1150
1151        return fsi_pio_transfer(fsi, io,
1152                                  fsi_pio_pop16,
1153                                  fsi_pio_pop32,
1154                                  samples);
1155}
1156
1157static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io)
1158{
1159        int sample_residues;    /* ALSA residue samples */
1160        int sample_space;       /* FSI fifo free samples space */
1161        int samples;
1162
1163        sample_residues = io->buff_sample_capa - io->buff_sample_pos;
1164        sample_space    = io->fifo_sample_capa -
1165                fsi_get_current_fifo_samples(fsi, io);
1166
1167        samples = min(sample_residues, sample_space);
1168
1169        return fsi_pio_transfer(fsi, io,
1170                                  fsi_pio_push16,
1171                                  fsi_pio_push32,
1172                                  samples);
1173}
1174
1175static int fsi_pio_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1176                               int enable)
1177{
1178        struct fsi_master *master = fsi_get_master(fsi);
1179        u32 clk  = fsi_is_port_a(fsi) ? CRA  : CRB;
1180
1181        if (enable)
1182                fsi_irq_enable(fsi, io);
1183        else
1184                fsi_irq_disable(fsi, io);
1185
1186        if (fsi_is_clk_master(fsi))
1187                fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1188
1189        return 0;
1190}
1191
1192static int fsi_pio_push_init(struct fsi_priv *fsi, struct fsi_stream *io)
1193{
1194        /*
1195         * we can use 16bit stream mode
1196         * when "playback" and "16bit data"
1197         * and platform allows "stream mode"
1198         * see
1199         *      fsi_pio_push16()
1200         */
1201        if (fsi_is_enable_stream(fsi))
1202                io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1203                                 BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1204        else
1205                io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1206                                 BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1207        return 0;
1208}
1209
1210static int fsi_pio_pop_init(struct fsi_priv *fsi, struct fsi_stream *io)
1211{
1212        /*
1213         * always 24bit bus, package back when "capture"
1214         */
1215        io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1216                         BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1217        return 0;
1218}
1219
1220static struct fsi_stream_handler fsi_pio_push_handler = {
1221        .init           = fsi_pio_push_init,
1222        .transfer       = fsi_pio_push,
1223        .start_stop     = fsi_pio_start_stop,
1224};
1225
1226static struct fsi_stream_handler fsi_pio_pop_handler = {
1227        .init           = fsi_pio_pop_init,
1228        .transfer       = fsi_pio_pop,
1229        .start_stop     = fsi_pio_start_stop,
1230};
1231
1232static irqreturn_t fsi_interrupt(int irq, void *data)
1233{
1234        struct fsi_master *master = data;
1235        u32 int_st = fsi_irq_get_status(master);
1236
1237        /* clear irq status */
1238        fsi_master_mask_set(master, SOFT_RST, IR, 0);
1239        fsi_master_mask_set(master, SOFT_RST, IR, IR);
1240
1241        if (int_st & AB_IO(1, AO_SHIFT))
1242                fsi_stream_transfer(&master->fsia.playback);
1243        if (int_st & AB_IO(1, BO_SHIFT))
1244                fsi_stream_transfer(&master->fsib.playback);
1245        if (int_st & AB_IO(1, AI_SHIFT))
1246                fsi_stream_transfer(&master->fsia.capture);
1247        if (int_st & AB_IO(1, BI_SHIFT))
1248                fsi_stream_transfer(&master->fsib.capture);
1249
1250        fsi_count_fifo_err(&master->fsia);
1251        fsi_count_fifo_err(&master->fsib);
1252
1253        fsi_irq_clear_status(&master->fsia);
1254        fsi_irq_clear_status(&master->fsib);
1255
1256        return IRQ_HANDLED;
1257}
1258
1259/*
1260 *              dma data transfer handler
1261 */
1262static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io)
1263{
1264        /*
1265         * 24bit data : 24bit bus / package in back
1266         * 16bit data : 16bit bus / stream mode
1267         */
1268        io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1269                         BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1270
1271        return 0;
1272}
1273
1274static void fsi_dma_complete(void *data)
1275{
1276        struct fsi_stream *io = (struct fsi_stream *)data;
1277        struct fsi_priv *fsi = fsi_stream_to_priv(io);
1278
1279        fsi_pointer_update(io, io->period_samples);
1280
1281        fsi_count_fifo_err(fsi);
1282}
1283
1284static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io)
1285{
1286        struct snd_soc_dai *dai = fsi_get_dai(io->substream);
1287        struct snd_pcm_substream *substream = io->substream;
1288        struct dma_async_tx_descriptor *desc;
1289        int is_play = fsi_stream_is_play(fsi, io);
1290        enum dma_transfer_direction dir;
1291        int ret = -EIO;
1292
1293        if (is_play)
1294                dir = DMA_MEM_TO_DEV;
1295        else
1296                dir = DMA_DEV_TO_MEM;
1297
1298        desc = dmaengine_prep_dma_cyclic(io->chan,
1299                                         substream->runtime->dma_addr,
1300                                         snd_pcm_lib_buffer_bytes(substream),
1301                                         snd_pcm_lib_period_bytes(substream),
1302                                         dir,
1303                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
1304        if (!desc) {
1305                dev_err(dai->dev, "dmaengine_prep_dma_cyclic() fail\n");
1306                goto fsi_dma_transfer_err;
1307        }
1308
1309        desc->callback          = fsi_dma_complete;
1310        desc->callback_param    = io;
1311
1312        if (dmaengine_submit(desc) < 0) {
1313                dev_err(dai->dev, "tx_submit() fail\n");
1314                goto fsi_dma_transfer_err;
1315        }
1316
1317        dma_async_issue_pending(io->chan);
1318
1319        /*
1320         * FIXME
1321         *
1322         * In DMAEngine case, codec and FSI cannot be started simultaneously
1323         * since FSI is using the scheduler work queue.
1324         * Therefore, in capture case, probably FSI FIFO will have got
1325         * overflow error in this point.
1326         * in that case, DMA cannot start transfer until error was cleared.
1327         */
1328        if (!is_play) {
1329                if (ERR_OVER & fsi_reg_read(fsi, DIFF_ST)) {
1330                        fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1331                        fsi_reg_write(fsi, DIFF_ST, 0);
1332                }
1333        }
1334
1335        ret = 0;
1336
1337fsi_dma_transfer_err:
1338        return ret;
1339}
1340
1341static int fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1342                                 int start)
1343{
1344        struct fsi_master *master = fsi_get_master(fsi);
1345        u32 clk  = fsi_is_port_a(fsi) ? CRA  : CRB;
1346        u32 enable = start ? DMA_ON : 0;
1347
1348        fsi_reg_mask_set(fsi, OUT_DMAC, DMA_ON, enable);
1349
1350        dmaengine_terminate_all(io->chan);
1351
1352        if (fsi_is_clk_master(fsi))
1353                fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1354
1355        return 0;
1356}
1357
1358static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev)
1359{
1360        int is_play = fsi_stream_is_play(fsi, io);
1361
1362#ifdef CONFIG_SUPERH
1363        dma_cap_mask_t mask;
1364        dma_cap_zero(mask);
1365        dma_cap_set(DMA_SLAVE, mask);
1366
1367        io->chan = dma_request_channel(mask, shdma_chan_filter,
1368                                       (void *)io->dma_id);
1369#else
1370        io->chan = dma_request_slave_channel(dev, is_play ? "tx" : "rx");
1371#endif
1372        if (io->chan) {
1373                struct dma_slave_config cfg = {};
1374                int ret;
1375
1376                if (is_play) {
1377                        cfg.dst_addr            = fsi->phys + REG_DODT;
1378                        cfg.dst_addr_width      = DMA_SLAVE_BUSWIDTH_4_BYTES;
1379                        cfg.direction           = DMA_MEM_TO_DEV;
1380                } else {
1381                        cfg.src_addr            = fsi->phys + REG_DIDT;
1382                        cfg.src_addr_width      = DMA_SLAVE_BUSWIDTH_4_BYTES;
1383                        cfg.direction           = DMA_DEV_TO_MEM;
1384                }
1385
1386                ret = dmaengine_slave_config(io->chan, &cfg);
1387                if (ret < 0) {
1388                        dma_release_channel(io->chan);
1389                        io->chan = NULL;
1390                }
1391        }
1392
1393        if (!io->chan) {
1394
1395                /* switch to PIO handler */
1396                if (is_play)
1397                        fsi->playback.handler   = &fsi_pio_push_handler;
1398                else
1399                        fsi->capture.handler    = &fsi_pio_pop_handler;
1400
1401                dev_info(dev, "switch handler (dma => pio)\n");
1402
1403                /* probe again */
1404                return fsi_stream_probe(fsi, dev);
1405        }
1406
1407        return 0;
1408}
1409
1410static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io)
1411{
1412        fsi_stream_stop(fsi, io);
1413
1414        if (io->chan)
1415                dma_release_channel(io->chan);
1416
1417        io->chan = NULL;
1418        return 0;
1419}
1420
1421static struct fsi_stream_handler fsi_dma_push_handler = {
1422        .init           = fsi_dma_init,
1423        .probe          = fsi_dma_probe,
1424        .transfer       = fsi_dma_transfer,
1425        .remove         = fsi_dma_remove,
1426        .start_stop     = fsi_dma_push_start_stop,
1427};
1428
1429/*
1430 *              dai ops
1431 */
1432static void fsi_fifo_init(struct fsi_priv *fsi,
1433                          struct fsi_stream *io,
1434                          struct device *dev)
1435{
1436        struct fsi_master *master = fsi_get_master(fsi);
1437        int is_play = fsi_stream_is_play(fsi, io);
1438        u32 shift, i;
1439        int frame_capa;
1440
1441        /* get on-chip RAM capacity */
1442        shift = fsi_master_read(master, FIFO_SZ);
1443        shift >>= fsi_get_port_shift(fsi, io);
1444        shift &= FIFO_SZ_MASK;
1445        frame_capa = 256 << shift;
1446        dev_dbg(dev, "fifo = %d words\n", frame_capa);
1447
1448        /*
1449         * The maximum number of sample data varies depending
1450         * on the number of channels selected for the format.
1451         *
1452         * FIFOs are used in 4-channel units in 3-channel mode
1453         * and in 8-channel units in 5- to 7-channel mode
1454         * meaning that more FIFOs than the required size of DPRAM
1455         * are used.
1456         *
1457         * ex) if 256 words of DP-RAM is connected
1458         * 1 channel:  256 (256 x 1 = 256)
1459         * 2 channels: 128 (128 x 2 = 256)
1460         * 3 channels:  64 ( 64 x 3 = 192)
1461         * 4 channels:  64 ( 64 x 4 = 256)
1462         * 5 channels:  32 ( 32 x 5 = 160)
1463         * 6 channels:  32 ( 32 x 6 = 192)
1464         * 7 channels:  32 ( 32 x 7 = 224)
1465         * 8 channels:  32 ( 32 x 8 = 256)
1466         */
1467        for (i = 1; i < fsi->chan_num; i <<= 1)
1468                frame_capa >>= 1;
1469        dev_dbg(dev, "%d channel %d store\n",
1470                fsi->chan_num, frame_capa);
1471
1472        io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
1473
1474        /*
1475         * set interrupt generation factor
1476         * clear FIFO
1477         */
1478        if (is_play) {
1479                fsi_reg_write(fsi,      DOFF_CTL, IRQ_HALF);
1480                fsi_reg_mask_set(fsi,   DOFF_CTL, FIFO_CLR, FIFO_CLR);
1481        } else {
1482                fsi_reg_write(fsi,      DIFF_CTL, IRQ_HALF);
1483                fsi_reg_mask_set(fsi,   DIFF_CTL, FIFO_CLR, FIFO_CLR);
1484        }
1485}
1486
1487static int fsi_hw_startup(struct fsi_priv *fsi,
1488                          struct fsi_stream *io,
1489                          struct device *dev)
1490{
1491        u32 data = 0;
1492
1493        /* clock setting */
1494        if (fsi_is_clk_master(fsi))
1495                data = DIMD | DOMD;
1496
1497        fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
1498
1499        /* clock inversion (CKG2) */
1500        data = 0;
1501        if (fsi->bit_clk_inv)
1502                data |= (1 << 0);
1503        if (fsi->lr_clk_inv)
1504                data |= (1 << 4);
1505        if (fsi_is_clk_master(fsi))
1506                data <<= 8;
1507        fsi_reg_write(fsi, CKG2, data);
1508
1509        /* spdif ? */
1510        if (fsi_is_spdif(fsi)) {
1511                fsi_spdif_clk_ctrl(fsi, 1);
1512                fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
1513        }
1514
1515        /*
1516         * get bus settings
1517         */
1518        data = 0;
1519        switch (io->sample_width) {
1520        case 2:
1521                data = BUSOP_GET(16, io->bus_option);
1522                break;
1523        case 4:
1524                data = BUSOP_GET(24, io->bus_option);
1525                break;
1526        }
1527        fsi_format_bus_setup(fsi, io, data, dev);
1528
1529        /* irq clear */
1530        fsi_irq_disable(fsi, io);
1531        fsi_irq_clear_status(fsi);
1532
1533        /* fifo init */
1534        fsi_fifo_init(fsi, io, dev);
1535
1536        /* start master clock */
1537        if (fsi_is_clk_master(fsi))
1538                return fsi_clk_enable(dev, fsi);
1539
1540        return 0;
1541}
1542
1543static int fsi_hw_shutdown(struct fsi_priv *fsi,
1544                            struct device *dev)
1545{
1546        /* stop master clock */
1547        if (fsi_is_clk_master(fsi))
1548                return fsi_clk_disable(dev, fsi);
1549
1550        return 0;
1551}
1552
1553static int fsi_dai_startup(struct snd_pcm_substream *substream,
1554                           struct snd_soc_dai *dai)
1555{
1556        struct fsi_priv *fsi = fsi_get_priv(substream);
1557
1558        fsi_clk_invalid(fsi);
1559
1560        return 0;
1561}
1562
1563static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
1564                             struct snd_soc_dai *dai)
1565{
1566        struct fsi_priv *fsi = fsi_get_priv(substream);
1567
1568        fsi_clk_invalid(fsi);
1569}
1570
1571static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
1572                           struct snd_soc_dai *dai)
1573{
1574        struct fsi_priv *fsi = fsi_get_priv(substream);
1575        struct fsi_stream *io = fsi_stream_get(fsi, substream);
1576        int ret = 0;
1577
1578        switch (cmd) {
1579        case SNDRV_PCM_TRIGGER_START:
1580                fsi_stream_init(fsi, io, substream);
1581                if (!ret)
1582                        ret = fsi_hw_startup(fsi, io, dai->dev);
1583                if (!ret)
1584                        ret = fsi_stream_start(fsi, io);
1585                if (!ret)
1586                        ret = fsi_stream_transfer(io);
1587                break;
1588        case SNDRV_PCM_TRIGGER_STOP:
1589                if (!ret)
1590                        ret = fsi_hw_shutdown(fsi, dai->dev);
1591                fsi_stream_stop(fsi, io);
1592                fsi_stream_quit(fsi, io);
1593                break;
1594        }
1595
1596        return ret;
1597}
1598
1599static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
1600{
1601        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1602        case SND_SOC_DAIFMT_I2S:
1603                fsi->fmt = CR_I2S;
1604                fsi->chan_num = 2;
1605                break;
1606        case SND_SOC_DAIFMT_LEFT_J:
1607                fsi->fmt = CR_PCM;
1608                fsi->chan_num = 2;
1609                break;
1610        default:
1611                return -EINVAL;
1612        }
1613
1614        return 0;
1615}
1616
1617static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
1618{
1619        struct fsi_master *master = fsi_get_master(fsi);
1620
1621        if (fsi_version(master) < 2)
1622                return -EINVAL;
1623
1624        fsi->fmt = CR_DTMD_SPDIF_PCM | CR_PCM;
1625        fsi->chan_num = 2;
1626
1627        return 0;
1628}
1629
1630static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1631{
1632        struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
1633        int ret;
1634
1635        /* set master/slave audio interface */
1636        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1637        case SND_SOC_DAIFMT_CBM_CFM:
1638                break;
1639        case SND_SOC_DAIFMT_CBS_CFS:
1640                fsi->clk_master = 1; /* codec is slave, cpu is master */
1641                break;
1642        default:
1643                return -EINVAL;
1644        }
1645
1646        /* set clock inversion */
1647        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1648        case SND_SOC_DAIFMT_NB_IF:
1649                fsi->bit_clk_inv = 0;
1650                fsi->lr_clk_inv = 1;
1651                break;
1652        case SND_SOC_DAIFMT_IB_NF:
1653                fsi->bit_clk_inv = 1;
1654                fsi->lr_clk_inv = 0;
1655                break;
1656        case SND_SOC_DAIFMT_IB_IF:
1657                fsi->bit_clk_inv = 1;
1658                fsi->lr_clk_inv = 1;
1659                break;
1660        case SND_SOC_DAIFMT_NB_NF:
1661        default:
1662                fsi->bit_clk_inv = 0;
1663                fsi->lr_clk_inv = 0;
1664                break;
1665        }
1666
1667        if (fsi_is_clk_master(fsi)) {
1668                if (fsi->clk_cpg)
1669                        fsi_clk_init(dai->dev, fsi, 0, 1, 1,
1670                                     fsi_clk_set_rate_cpg);
1671                else
1672                        fsi_clk_init(dai->dev, fsi, 1, 1, 0,
1673                                     fsi_clk_set_rate_external);
1674        }
1675
1676        /* set format */
1677        if (fsi_is_spdif(fsi))
1678                ret = fsi_set_fmt_spdif(fsi);
1679        else
1680                ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1681
1682        return ret;
1683}
1684
1685static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
1686                             struct snd_pcm_hw_params *params,
1687                             struct snd_soc_dai *dai)
1688{
1689        struct fsi_priv *fsi = fsi_get_priv(substream);
1690
1691        if (fsi_is_clk_master(fsi))
1692                fsi_clk_valid(fsi, params_rate(params));
1693
1694        return 0;
1695}
1696
1697static const struct snd_soc_dai_ops fsi_dai_ops = {
1698        .startup        = fsi_dai_startup,
1699        .shutdown       = fsi_dai_shutdown,
1700        .trigger        = fsi_dai_trigger,
1701        .set_fmt        = fsi_dai_set_fmt,
1702        .hw_params      = fsi_dai_hw_params,
1703};
1704
1705/*
1706 *              pcm ops
1707 */
1708
1709static const struct snd_pcm_hardware fsi_pcm_hardware = {
1710        .info =         SNDRV_PCM_INFO_INTERLEAVED      |
1711                        SNDRV_PCM_INFO_MMAP             |
1712                        SNDRV_PCM_INFO_MMAP_VALID,
1713        .buffer_bytes_max       = 64 * 1024,
1714        .period_bytes_min       = 32,
1715        .period_bytes_max       = 8192,
1716        .periods_min            = 1,
1717        .periods_max            = 32,
1718        .fifo_size              = 256,
1719};
1720
1721static int fsi_pcm_open(struct snd_pcm_substream *substream)
1722{
1723        struct snd_pcm_runtime *runtime = substream->runtime;
1724        int ret = 0;
1725
1726        snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
1727
1728        ret = snd_pcm_hw_constraint_integer(runtime,
1729                                            SNDRV_PCM_HW_PARAM_PERIODS);
1730
1731        return ret;
1732}
1733
1734static int fsi_hw_params(struct snd_pcm_substream *substream,
1735                         struct snd_pcm_hw_params *hw_params)
1736{
1737        return snd_pcm_lib_malloc_pages(substream,
1738                                        params_buffer_bytes(hw_params));
1739}
1740
1741static int fsi_hw_free(struct snd_pcm_substream *substream)
1742{
1743        return snd_pcm_lib_free_pages(substream);
1744}
1745
1746static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
1747{
1748        struct fsi_priv *fsi = fsi_get_priv(substream);
1749        struct fsi_stream *io = fsi_stream_get(fsi, substream);
1750
1751        return fsi_sample2frame(fsi, io->buff_sample_pos);
1752}
1753
1754static const struct snd_pcm_ops fsi_pcm_ops = {
1755        .open           = fsi_pcm_open,
1756        .ioctl          = snd_pcm_lib_ioctl,
1757        .hw_params      = fsi_hw_params,
1758        .hw_free        = fsi_hw_free,
1759        .pointer        = fsi_pointer,
1760};
1761
1762/*
1763 *              snd_soc_component
1764 */
1765
1766#define PREALLOC_BUFFER         (32 * 1024)
1767#define PREALLOC_BUFFER_MAX     (32 * 1024)
1768
1769static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
1770{
1771        snd_pcm_lib_preallocate_pages_for_all(
1772                rtd->pcm,
1773                SNDRV_DMA_TYPE_DEV,
1774                rtd->card->snd_card->dev,
1775                PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1776        return 0;
1777}
1778
1779/*
1780 *              alsa struct
1781 */
1782
1783static struct snd_soc_dai_driver fsi_soc_dai[] = {
1784        {
1785                .name                   = "fsia-dai",
1786                .playback = {
1787                        .rates          = FSI_RATES,
1788                        .formats        = FSI_FMTS,
1789                        .channels_min   = 2,
1790                        .channels_max   = 2,
1791                },
1792                .capture = {
1793                        .rates          = FSI_RATES,
1794                        .formats        = FSI_FMTS,
1795                        .channels_min   = 2,
1796                        .channels_max   = 2,
1797                },
1798                .ops = &fsi_dai_ops,
1799        },
1800        {
1801                .name                   = "fsib-dai",
1802                .playback = {
1803                        .rates          = FSI_RATES,
1804                        .formats        = FSI_FMTS,
1805                        .channels_min   = 2,
1806                        .channels_max   = 2,
1807                },
1808                .capture = {
1809                        .rates          = FSI_RATES,
1810                        .formats        = FSI_FMTS,
1811                        .channels_min   = 2,
1812                        .channels_max   = 2,
1813                },
1814                .ops = &fsi_dai_ops,
1815        },
1816};
1817
1818static const struct snd_soc_component_driver fsi_soc_component = {
1819        .name           = "fsi",
1820        .ops            = &fsi_pcm_ops,
1821        .pcm_new        = fsi_pcm_new,
1822};
1823
1824/*
1825 *              platform function
1826 */
1827static void fsi_of_parse(char *name,
1828                         struct device_node *np,
1829                         struct sh_fsi_port_info *info,
1830                         struct device *dev)
1831{
1832        int i;
1833        char prop[128];
1834        unsigned long flags = 0;
1835        struct {
1836                char *name;
1837                unsigned int val;
1838        } of_parse_property[] = {
1839                { "spdif-connection",           SH_FSI_FMT_SPDIF },
1840                { "stream-mode-support",        SH_FSI_ENABLE_STREAM_MODE },
1841                { "use-internal-clock",         SH_FSI_CLK_CPG },
1842        };
1843
1844        for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) {
1845                sprintf(prop, "%s,%s", name, of_parse_property[i].name);
1846                if (of_get_property(np, prop, NULL))
1847                        flags |= of_parse_property[i].val;
1848        }
1849        info->flags = flags;
1850
1851        dev_dbg(dev, "%s flags : %lx\n", name, info->flags);
1852}
1853
1854static void fsi_port_info_init(struct fsi_priv *fsi,
1855                               struct sh_fsi_port_info *info)
1856{
1857        if (info->flags & SH_FSI_FMT_SPDIF)
1858                fsi->spdif = 1;
1859
1860        if (info->flags & SH_FSI_CLK_CPG)
1861                fsi->clk_cpg = 1;
1862
1863        if (info->flags & SH_FSI_ENABLE_STREAM_MODE)
1864                fsi->enable_stream = 1;
1865}
1866
1867static void fsi_handler_init(struct fsi_priv *fsi,
1868                             struct sh_fsi_port_info *info)
1869{
1870        fsi->playback.handler   = &fsi_pio_push_handler; /* default PIO */
1871        fsi->playback.priv      = fsi;
1872        fsi->capture.handler    = &fsi_pio_pop_handler;  /* default PIO */
1873        fsi->capture.priv       = fsi;
1874
1875        if (info->tx_id) {
1876                fsi->playback.dma_id  = info->tx_id;
1877                fsi->playback.handler = &fsi_dma_push_handler;
1878        }
1879}
1880
1881static const struct fsi_core fsi1_core = {
1882        .ver    = 1,
1883
1884        /* Interrupt */
1885        .int_st = INT_ST,
1886        .iemsk  = IEMSK,
1887        .imsk   = IMSK,
1888};
1889
1890static const struct fsi_core fsi2_core = {
1891        .ver    = 2,
1892
1893        /* Interrupt */
1894        .int_st = CPU_INT_ST,
1895        .iemsk  = CPU_IEMSK,
1896        .imsk   = CPU_IMSK,
1897        .a_mclk = A_MST_CTLR,
1898        .b_mclk = B_MST_CTLR,
1899};
1900
1901static const struct of_device_id fsi_of_match[] = {
1902        { .compatible = "renesas,sh_fsi",       .data = &fsi1_core},
1903        { .compatible = "renesas,sh_fsi2",      .data = &fsi2_core},
1904        {},
1905};
1906MODULE_DEVICE_TABLE(of, fsi_of_match);
1907
1908static const struct platform_device_id fsi_id_table[] = {
1909        { "sh_fsi",     (kernel_ulong_t)&fsi1_core },
1910        {},
1911};
1912MODULE_DEVICE_TABLE(platform, fsi_id_table);
1913
1914static int fsi_probe(struct platform_device *pdev)
1915{
1916        struct fsi_master *master;
1917        struct device_node *np = pdev->dev.of_node;
1918        struct sh_fsi_platform_info info;
1919        const struct fsi_core *core;
1920        struct fsi_priv *fsi;
1921        struct resource *res;
1922        unsigned int irq;
1923        int ret;
1924
1925        memset(&info, 0, sizeof(info));
1926
1927        core = NULL;
1928        if (np) {
1929                core = of_device_get_match_data(&pdev->dev);
1930                fsi_of_parse("fsia", np, &info.port_a, &pdev->dev);
1931                fsi_of_parse("fsib", np, &info.port_b, &pdev->dev);
1932        } else {
1933                const struct platform_device_id *id_entry = pdev->id_entry;
1934                if (id_entry)
1935                        core = (struct fsi_core *)id_entry->driver_data;
1936
1937                if (pdev->dev.platform_data)
1938                        memcpy(&info, pdev->dev.platform_data, sizeof(info));
1939        }
1940
1941        if (!core) {
1942                dev_err(&pdev->dev, "unknown fsi device\n");
1943                return -ENODEV;
1944        }
1945
1946        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1947        irq = platform_get_irq(pdev, 0);
1948        if (!res || (int)irq <= 0) {
1949                dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
1950                return -ENODEV;
1951        }
1952
1953        master = devm_kzalloc(&pdev->dev, sizeof(*master), GFP_KERNEL);
1954        if (!master)
1955                return -ENOMEM;
1956
1957        master->base = devm_ioremap_nocache(&pdev->dev,
1958                                            res->start, resource_size(res));
1959        if (!master->base) {
1960                dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
1961                return -ENXIO;
1962        }
1963
1964        /* master setting */
1965        master->core            = core;
1966        spin_lock_init(&master->lock);
1967
1968        /* FSI A setting */
1969        fsi             = &master->fsia;
1970        fsi->base       = master->base;
1971        fsi->phys       = res->start;
1972        fsi->master     = master;
1973        fsi_port_info_init(fsi, &info.port_a);
1974        fsi_handler_init(fsi, &info.port_a);
1975        ret = fsi_stream_probe(fsi, &pdev->dev);
1976        if (ret < 0) {
1977                dev_err(&pdev->dev, "FSIA stream probe failed\n");
1978                return ret;
1979        }
1980
1981        /* FSI B setting */
1982        fsi             = &master->fsib;
1983        fsi->base       = master->base + 0x40;
1984        fsi->phys       = res->start + 0x40;
1985        fsi->master     = master;
1986        fsi_port_info_init(fsi, &info.port_b);
1987        fsi_handler_init(fsi, &info.port_b);
1988        ret = fsi_stream_probe(fsi, &pdev->dev);
1989        if (ret < 0) {
1990                dev_err(&pdev->dev, "FSIB stream probe failed\n");
1991                goto exit_fsia;
1992        }
1993
1994        pm_runtime_enable(&pdev->dev);
1995        dev_set_drvdata(&pdev->dev, master);
1996
1997        ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0,
1998                               dev_name(&pdev->dev), master);
1999        if (ret) {
2000                dev_err(&pdev->dev, "irq request err\n");
2001                goto exit_fsib;
2002        }
2003
2004        ret = devm_snd_soc_register_component(&pdev->dev, &fsi_soc_component,
2005                                    fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai));
2006        if (ret < 0) {
2007                dev_err(&pdev->dev, "cannot snd component register\n");
2008                goto exit_fsib;
2009        }
2010
2011        return ret;
2012
2013exit_fsib:
2014        pm_runtime_disable(&pdev->dev);
2015        fsi_stream_remove(&master->fsib);
2016exit_fsia:
2017        fsi_stream_remove(&master->fsia);
2018
2019        return ret;
2020}
2021
2022static int fsi_remove(struct platform_device *pdev)
2023{
2024        struct fsi_master *master;
2025
2026        master = dev_get_drvdata(&pdev->dev);
2027
2028        pm_runtime_disable(&pdev->dev);
2029
2030        fsi_stream_remove(&master->fsia);
2031        fsi_stream_remove(&master->fsib);
2032
2033        return 0;
2034}
2035
2036static void __fsi_suspend(struct fsi_priv *fsi,
2037                          struct fsi_stream *io,
2038                          struct device *dev)
2039{
2040        if (!fsi_stream_is_working(fsi, io))
2041                return;
2042
2043        fsi_stream_stop(fsi, io);
2044        fsi_hw_shutdown(fsi, dev);
2045}
2046
2047static void __fsi_resume(struct fsi_priv *fsi,
2048                         struct fsi_stream *io,
2049                         struct device *dev)
2050{
2051        if (!fsi_stream_is_working(fsi, io))
2052                return;
2053
2054        fsi_hw_startup(fsi, io, dev);
2055        fsi_stream_start(fsi, io);
2056}
2057
2058static int fsi_suspend(struct device *dev)
2059{
2060        struct fsi_master *master = dev_get_drvdata(dev);
2061        struct fsi_priv *fsia = &master->fsia;
2062        struct fsi_priv *fsib = &master->fsib;
2063
2064        __fsi_suspend(fsia, &fsia->playback, dev);
2065        __fsi_suspend(fsia, &fsia->capture, dev);
2066
2067        __fsi_suspend(fsib, &fsib->playback, dev);
2068        __fsi_suspend(fsib, &fsib->capture, dev);
2069
2070        return 0;
2071}
2072
2073static int fsi_resume(struct device *dev)
2074{
2075        struct fsi_master *master = dev_get_drvdata(dev);
2076        struct fsi_priv *fsia = &master->fsia;
2077        struct fsi_priv *fsib = &master->fsib;
2078
2079        __fsi_resume(fsia, &fsia->playback, dev);
2080        __fsi_resume(fsia, &fsia->capture, dev);
2081
2082        __fsi_resume(fsib, &fsib->playback, dev);
2083        __fsi_resume(fsib, &fsib->capture, dev);
2084
2085        return 0;
2086}
2087
2088static const struct dev_pm_ops fsi_pm_ops = {
2089        .suspend                = fsi_suspend,
2090        .resume                 = fsi_resume,
2091};
2092
2093static struct platform_driver fsi_driver = {
2094        .driver         = {
2095                .name   = "fsi-pcm-audio",
2096                .pm     = &fsi_pm_ops,
2097                .of_match_table = fsi_of_match,
2098        },
2099        .probe          = fsi_probe,
2100        .remove         = fsi_remove,
2101        .id_table       = fsi_id_table,
2102};
2103
2104module_platform_driver(fsi_driver);
2105
2106MODULE_LICENSE("GPL v2");
2107MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
2108MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
2109MODULE_ALIAS("platform:fsi-pcm-audio");
2110