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0001 // SPDX-License-Identifier: GPL-2.0
0002 //
0003 // Renesas R-Car SRU/SCU/SSIU/SSI support
0004 //
0005 // Copyright (C) 2013 Renesas Solutions Corp.
0006 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
0007 //
0008 // Based on fsi.c
0009 // Kuninori Morimoto <morimoto.kuninori@renesas.com>
0010 
0011 /*
0012  * Renesas R-Car sound device structure
0013  *
0014  * Gen1
0015  *
0016  * SRU      : Sound Routing Unit
0017  *  - SRC   : Sampling Rate Converter
0018  *  - CMD
0019  *    - CTU : Channel Count Conversion Unit
0020  *    - MIX : Mixer
0021  *    - DVC : Digital Volume and Mute Function
0022  *  - SSI   : Serial Sound Interface
0023  *
0024  * Gen2
0025  *
0026  * SCU      : Sampling Rate Converter Unit
0027  *  - SRC   : Sampling Rate Converter
0028  *  - CMD
0029  *   - CTU  : Channel Count Conversion Unit
0030  *   - MIX  : Mixer
0031  *   - DVC  : Digital Volume and Mute Function
0032  * SSIU     : Serial Sound Interface Unit
0033  *  - SSI   : Serial Sound Interface
0034  */
0035 
0036 /*
0037  *  driver data Image
0038  *
0039  * rsnd_priv
0040  *   |
0041  *   | ** this depends on Gen1/Gen2
0042  *   |
0043  *   +- gen
0044  *   |
0045  *   | ** these depend on data path
0046  *   | ** gen and platform data control it
0047  *   |
0048  *   +- rdai[0]
0049  *   |   |       sru     ssiu      ssi
0050  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
0051  *   |   |
0052  *   |   |       sru     ssiu      ssi
0053  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
0054  *   |
0055  *   +- rdai[1]
0056  *   |   |       sru     ssiu      ssi
0057  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
0058  *   |   |
0059  *   |   |       sru     ssiu      ssi
0060  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
0061  *   ...
0062  *   |
0063  *   | ** these control ssi
0064  *   |
0065  *   +- ssi
0066  *   |  |
0067  *   |  +- ssi[0]
0068  *   |  +- ssi[1]
0069  *   |  +- ssi[2]
0070  *   |  ...
0071  *   |
0072  *   | ** these control src
0073  *   |
0074  *   +- src
0075  *      |
0076  *      +- src[0]
0077  *      +- src[1]
0078  *      +- src[2]
0079  *      ...
0080  *
0081  *
0082  * for_each_rsnd_dai(xx, priv, xx)
0083  *  rdai[0] => rdai[1] => rdai[2] => ...
0084  *
0085  * for_each_rsnd_mod(xx, rdai, xx)
0086  *  [mod] => [mod] => [mod] => ...
0087  *
0088  * rsnd_dai_call(xxx, fn )
0089  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
0090  *
0091  */
0092 
0093 #include <linux/pm_runtime.h>
0094 #include "rsnd.h"
0095 
0096 #define RSND_RATES SNDRV_PCM_RATE_8000_192000
0097 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S8 |\
0098            SNDRV_PCM_FMTBIT_S16_LE |\
0099            SNDRV_PCM_FMTBIT_S24_LE)
0100 
0101 static const struct of_device_id rsnd_of_match[] = {
0102     { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
0103     { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
0104     { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN3 },
0105     /* Special Handling */
0106     { .compatible = "renesas,rcar_sound-r8a77990", .data = (void *)(RSND_GEN3 | RSND_SOC_E) },
0107     {},
0108 };
0109 MODULE_DEVICE_TABLE(of, rsnd_of_match);
0110 
0111 /*
0112  *  rsnd_mod functions
0113  */
0114 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
0115 {
0116     if (mod->type != type) {
0117         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
0118         struct device *dev = rsnd_priv_to_dev(priv);
0119 
0120         dev_warn(dev, "%s is not your expected module\n",
0121              rsnd_mod_name(mod));
0122     }
0123 }
0124 
0125 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
0126                   struct rsnd_mod *mod)
0127 {
0128     if (!mod || !mod->ops || !mod->ops->dma_req)
0129         return NULL;
0130 
0131     return mod->ops->dma_req(io, mod);
0132 }
0133 
0134 #define MOD_NAME_NUM   5
0135 #define MOD_NAME_SIZE 16
0136 char *rsnd_mod_name(struct rsnd_mod *mod)
0137 {
0138     static char names[MOD_NAME_NUM][MOD_NAME_SIZE];
0139     static int num;
0140     char *name = names[num];
0141 
0142     num++;
0143     if (num >= MOD_NAME_NUM)
0144         num = 0;
0145 
0146     /*
0147      * Let's use same char to avoid pointlessness memory
0148      * Thus, rsnd_mod_name() should be used immediately
0149      * Don't keep pointer
0150      */
0151     if ((mod)->ops->id_sub) {
0152         snprintf(name, MOD_NAME_SIZE, "%s[%d%d]",
0153              mod->ops->name,
0154              rsnd_mod_id(mod),
0155              rsnd_mod_id_sub(mod));
0156     } else {
0157         snprintf(name, MOD_NAME_SIZE, "%s[%d]",
0158              mod->ops->name,
0159              rsnd_mod_id(mod));
0160     }
0161 
0162     return name;
0163 }
0164 
0165 u32 *rsnd_mod_get_status(struct rsnd_mod *mod,
0166              struct rsnd_dai_stream *io,
0167              enum rsnd_mod_type type)
0168 {
0169     return &mod->status;
0170 }
0171 
0172 int rsnd_mod_id_raw(struct rsnd_mod *mod)
0173 {
0174     return mod->id;
0175 }
0176 
0177 int rsnd_mod_id(struct rsnd_mod *mod)
0178 {
0179     if ((mod)->ops->id)
0180         return (mod)->ops->id(mod);
0181 
0182     return rsnd_mod_id_raw(mod);
0183 }
0184 
0185 int rsnd_mod_id_sub(struct rsnd_mod *mod)
0186 {
0187     if ((mod)->ops->id_sub)
0188         return (mod)->ops->id_sub(mod);
0189 
0190     return 0;
0191 }
0192 
0193 int rsnd_mod_init(struct rsnd_priv *priv,
0194           struct rsnd_mod *mod,
0195           struct rsnd_mod_ops *ops,
0196           struct clk *clk,
0197           enum rsnd_mod_type type,
0198           int id)
0199 {
0200     int ret = clk_prepare(clk);
0201 
0202     if (ret)
0203         return ret;
0204 
0205     mod->id     = id;
0206     mod->ops    = ops;
0207     mod->type   = type;
0208     mod->clk    = clk;
0209     mod->priv   = priv;
0210 
0211     return 0;
0212 }
0213 
0214 void rsnd_mod_quit(struct rsnd_mod *mod)
0215 {
0216     clk_unprepare(mod->clk);
0217     mod->clk = NULL;
0218 }
0219 
0220 void rsnd_mod_interrupt(struct rsnd_mod *mod,
0221             void (*callback)(struct rsnd_mod *mod,
0222                      struct rsnd_dai_stream *io))
0223 {
0224     struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
0225     struct rsnd_dai *rdai;
0226     int i;
0227 
0228     for_each_rsnd_dai(rdai, priv, i) {
0229         struct rsnd_dai_stream *io = &rdai->playback;
0230 
0231         if (mod == io->mod[mod->type])
0232             callback(mod, io);
0233 
0234         io = &rdai->capture;
0235         if (mod == io->mod[mod->type])
0236             callback(mod, io);
0237     }
0238 }
0239 
0240 int rsnd_io_is_working(struct rsnd_dai_stream *io)
0241 {
0242     /* see rsnd_dai_stream_init/quit() */
0243     if (io->substream)
0244         return snd_pcm_running(io->substream);
0245 
0246     return 0;
0247 }
0248 
0249 int rsnd_runtime_channel_original_with_params(struct rsnd_dai_stream *io,
0250                           struct snd_pcm_hw_params *params)
0251 {
0252     struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
0253 
0254     /*
0255      * params will be added when refine
0256      * see
0257      *  __rsnd_soc_hw_rule_rate()
0258      *  __rsnd_soc_hw_rule_channels()
0259      */
0260     if (params)
0261         return params_channels(params);
0262     else if (runtime)
0263         return runtime->channels;
0264     return 0;
0265 }
0266 
0267 int rsnd_runtime_channel_after_ctu_with_params(struct rsnd_dai_stream *io,
0268                            struct snd_pcm_hw_params *params)
0269 {
0270     int chan = rsnd_runtime_channel_original_with_params(io, params);
0271     struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
0272 
0273     if (ctu_mod) {
0274         u32 converted_chan = rsnd_io_converted_chan(io);
0275 
0276         /*
0277          * !! Note !!
0278          *
0279          * converted_chan will be used for CTU,
0280          * or TDM Split mode.
0281          * User shouldn't use CTU with TDM Split mode.
0282          */
0283         if (rsnd_runtime_is_tdm_split(io)) {
0284             struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
0285 
0286             dev_err(dev, "CTU and TDM Split should be used\n");
0287         }
0288 
0289         if (converted_chan)
0290             return converted_chan;
0291     }
0292 
0293     return chan;
0294 }
0295 
0296 int rsnd_channel_normalization(int chan)
0297 {
0298     if (WARN_ON((chan > 8) || (chan < 0)))
0299         return 0;
0300 
0301     /* TDM Extend Mode needs 8ch */
0302     if (chan == 6)
0303         chan = 8;
0304 
0305     return chan;
0306 }
0307 
0308 int rsnd_runtime_channel_for_ssi_with_params(struct rsnd_dai_stream *io,
0309                          struct snd_pcm_hw_params *params)
0310 {
0311     struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
0312     int chan = rsnd_io_is_play(io) ?
0313         rsnd_runtime_channel_after_ctu_with_params(io, params) :
0314         rsnd_runtime_channel_original_with_params(io, params);
0315 
0316     /* Use Multi SSI */
0317     if (rsnd_runtime_is_multi_ssi(io))
0318         chan /= rsnd_rdai_ssi_lane_get(rdai);
0319 
0320     return rsnd_channel_normalization(chan);
0321 }
0322 
0323 int rsnd_runtime_is_multi_ssi(struct rsnd_dai_stream *io)
0324 {
0325     struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
0326     int lane = rsnd_rdai_ssi_lane_get(rdai);
0327     int chan = rsnd_io_is_play(io) ?
0328         rsnd_runtime_channel_after_ctu(io) :
0329         rsnd_runtime_channel_original(io);
0330 
0331     return (chan > 2) && (lane > 1);
0332 }
0333 
0334 int rsnd_runtime_is_tdm(struct rsnd_dai_stream *io)
0335 {
0336     return rsnd_runtime_channel_for_ssi(io) >= 6;
0337 }
0338 
0339 int rsnd_runtime_is_tdm_split(struct rsnd_dai_stream *io)
0340 {
0341     return !!rsnd_flags_has(io, RSND_STREAM_TDM_SPLIT);
0342 }
0343 
0344 /*
0345  *  ADINR function
0346  */
0347 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
0348 {
0349     struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
0350     struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
0351     struct device *dev = rsnd_priv_to_dev(priv);
0352 
0353     switch (snd_pcm_format_width(runtime->format)) {
0354     case 8:
0355         return 16 << 16;
0356     case 16:
0357         return 8 << 16;
0358     case 24:
0359         return 0 << 16;
0360     }
0361 
0362     dev_warn(dev, "not supported sample bits\n");
0363 
0364     return 0;
0365 }
0366 
0367 /*
0368  *  DALIGN function
0369  */
0370 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
0371 {
0372     static const u32 dalign_values[8] = {
0373         0x76543210, 0x00000032, 0x00007654, 0x00000076,
0374         0xfedcba98, 0x000000ba, 0x0000fedc, 0x000000fe,
0375     };
0376     int id = 0;
0377     struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
0378     struct rsnd_mod *target;
0379     struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
0380     u32 dalign;
0381 
0382     /*
0383      * *Hardware* L/R and *Software* L/R are inverted for 16bit data.
0384      *      31..16 15...0
0385      *  HW: [L ch] [R ch]
0386      *  SW: [R ch] [L ch]
0387      * We need to care about inversion timing to control
0388      * Playback/Capture correctly.
0389      * The point is [DVC] needs *Hardware* L/R, [MEM] needs *Software* L/R
0390      *
0391      * sL/R : software L/R
0392      * hL/R : hardware L/R
0393      * (*)  : conversion timing
0394      *
0395      * Playback
0396      *       sL/R (*) hL/R     hL/R     hL/R      hL/R     hL/R
0397      *  [MEM] -> [SRC] -> [DVC] -> [CMD] -> [SSIU] -> [SSI] -> codec
0398      *
0399      * Capture
0400      *       hL/R     hL/R      hL/R     hL/R     hL/R (*) sL/R
0401      *  codec -> [SSI] -> [SSIU] -> [SRC] -> [DVC] -> [CMD] -> [MEM]
0402      */
0403     if (rsnd_io_is_play(io)) {
0404         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
0405 
0406         target = src ? src : ssiu;
0407     } else {
0408         struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
0409 
0410         target = cmd ? cmd : ssiu;
0411     }
0412 
0413     if (mod == ssiu)
0414         id = rsnd_mod_id_sub(mod);
0415 
0416     dalign = dalign_values[id];
0417 
0418     if (mod == target && snd_pcm_format_width(runtime->format) == 16) {
0419         /* Target mod needs inverted DALIGN when 16bit */
0420         dalign = (dalign & 0xf0f0f0f0) >> 4 |
0421              (dalign & 0x0f0f0f0f) << 4;
0422     }
0423 
0424     return dalign;
0425 }
0426 
0427 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
0428 {
0429     static const enum rsnd_mod_type playback_mods[] = {
0430         RSND_MOD_SRC,
0431         RSND_MOD_CMD,
0432         RSND_MOD_SSIU,
0433     };
0434     static const enum rsnd_mod_type capture_mods[] = {
0435         RSND_MOD_CMD,
0436         RSND_MOD_SRC,
0437         RSND_MOD_SSIU,
0438     };
0439     struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
0440     struct rsnd_mod *tmod = NULL;
0441     const enum rsnd_mod_type *mods =
0442         rsnd_io_is_play(io) ?
0443         playback_mods : capture_mods;
0444     int i;
0445 
0446     /*
0447      * This is needed for 24bit data
0448      * We need to shift 8bit
0449      *
0450      * Linux 24bit data is located as 0x00******
0451      * HW    24bit data is located as 0x******00
0452      *
0453      */
0454     if (snd_pcm_format_width(runtime->format) != 24)
0455         return 0;
0456 
0457     for (i = 0; i < ARRAY_SIZE(playback_mods); i++) {
0458         tmod = rsnd_io_to_mod(io, mods[i]);
0459         if (tmod)
0460             break;
0461     }
0462 
0463     if (tmod != mod)
0464         return 0;
0465 
0466     if (rsnd_io_is_play(io))
0467         return  (0 << 20) | /* shift to Left */
0468             (8 << 16);  /* 8bit */
0469     else
0470         return  (1 << 20) | /* shift to Right */
0471             (8 << 16);  /* 8bit */
0472 }
0473 
0474 /*
0475  *  rsnd_dai functions
0476  */
0477 struct rsnd_mod *rsnd_mod_next(int *iterator,
0478                    struct rsnd_dai_stream *io,
0479                    enum rsnd_mod_type *array,
0480                    int array_size)
0481 {
0482     int max = array ? array_size : RSND_MOD_MAX;
0483 
0484     for (; *iterator < max; (*iterator)++) {
0485         enum rsnd_mod_type type = (array) ? array[*iterator] : *iterator;
0486         struct rsnd_mod *mod = rsnd_io_to_mod(io, type);
0487 
0488         if (mod)
0489             return mod;
0490     }
0491 
0492     return NULL;
0493 }
0494 
0495 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
0496     {
0497         /* CAPTURE */
0498         RSND_MOD_AUDMAPP,
0499         RSND_MOD_AUDMA,
0500         RSND_MOD_DVC,
0501         RSND_MOD_MIX,
0502         RSND_MOD_CTU,
0503         RSND_MOD_CMD,
0504         RSND_MOD_SRC,
0505         RSND_MOD_SSIU,
0506         RSND_MOD_SSIM3,
0507         RSND_MOD_SSIM2,
0508         RSND_MOD_SSIM1,
0509         RSND_MOD_SSIP,
0510         RSND_MOD_SSI,
0511     }, {
0512         /* PLAYBACK */
0513         RSND_MOD_AUDMAPP,
0514         RSND_MOD_AUDMA,
0515         RSND_MOD_SSIM3,
0516         RSND_MOD_SSIM2,
0517         RSND_MOD_SSIM1,
0518         RSND_MOD_SSIP,
0519         RSND_MOD_SSI,
0520         RSND_MOD_SSIU,
0521         RSND_MOD_DVC,
0522         RSND_MOD_MIX,
0523         RSND_MOD_CTU,
0524         RSND_MOD_CMD,
0525         RSND_MOD_SRC,
0526     },
0527 };
0528 
0529 static int rsnd_status_update(struct rsnd_dai_stream *io,
0530                   struct rsnd_mod *mod, enum rsnd_mod_type type,
0531                   int shift, int add, int timing)
0532 {
0533     u32 *status = mod->ops->get_status(mod, io, type);
0534     u32 mask    = 0xF << shift;
0535     u8 val      = (*status >> shift) & 0xF;
0536     u8 next_val = (val + add) & 0xF;
0537     int func_call   = (val == timing);
0538 
0539     /* no status update */
0540     if (add == 0 || shift == 28)
0541         return 1;
0542 
0543     if (next_val == 0xF) /* underflow case */
0544         func_call = -1;
0545     else
0546         *status = (*status & ~mask) + (next_val << shift);
0547 
0548     return func_call;
0549 }
0550 
0551 #define rsnd_dai_call(fn, io, param...)                 \
0552 ({                                  \
0553     struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io)); \
0554     struct rsnd_mod *mod;                       \
0555     int is_play = rsnd_io_is_play(io);              \
0556     int ret = 0, i;                         \
0557     enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];     \
0558     for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) { \
0559         int tmp = 0;                        \
0560         int func_call = rsnd_status_update(io, mod, types[i],   \
0561                         __rsnd_mod_shift_##fn,  \
0562                         __rsnd_mod_add_##fn,    \
0563                         __rsnd_mod_call_##fn);  \
0564         if (func_call > 0 && (mod)->ops->fn)            \
0565             tmp = (mod)->ops->fn(mod, io, param);       \
0566         if (unlikely(func_call < 0) ||              \
0567             unlikely(tmp && (tmp != -EPROBE_DEFER)))        \
0568             dev_err(dev, "%s : %s error (%d, %d)\n",    \
0569                 rsnd_mod_name(mod), #fn, tmp, func_call);\
0570         ret |= tmp;                     \
0571     }                               \
0572     ret;                                \
0573 })
0574 
0575 int rsnd_dai_connect(struct rsnd_mod *mod,
0576              struct rsnd_dai_stream *io,
0577              enum rsnd_mod_type type)
0578 {
0579     struct rsnd_priv *priv;
0580     struct device *dev;
0581 
0582     if (!mod)
0583         return -EIO;
0584 
0585     if (io->mod[type] == mod)
0586         return 0;
0587 
0588     if (io->mod[type])
0589         return -EINVAL;
0590 
0591     priv = rsnd_mod_to_priv(mod);
0592     dev = rsnd_priv_to_dev(priv);
0593 
0594     io->mod[type] = mod;
0595 
0596     dev_dbg(dev, "%s is connected to io (%s)\n",
0597         rsnd_mod_name(mod),
0598         rsnd_io_is_play(io) ? "Playback" : "Capture");
0599 
0600     return 0;
0601 }
0602 
0603 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
0604                 struct rsnd_dai_stream *io,
0605                 enum rsnd_mod_type type)
0606 {
0607     io->mod[type] = NULL;
0608 }
0609 
0610 int rsnd_rdai_channels_ctrl(struct rsnd_dai *rdai,
0611                 int max_channels)
0612 {
0613     if (max_channels > 0)
0614         rdai->max_channels = max_channels;
0615 
0616     return rdai->max_channels;
0617 }
0618 
0619 int rsnd_rdai_ssi_lane_ctrl(struct rsnd_dai *rdai,
0620                 int ssi_lane)
0621 {
0622     if (ssi_lane > 0)
0623         rdai->ssi_lane = ssi_lane;
0624 
0625     return rdai->ssi_lane;
0626 }
0627 
0628 int rsnd_rdai_width_ctrl(struct rsnd_dai *rdai, int width)
0629 {
0630     if (width > 0)
0631         rdai->chan_width = width;
0632 
0633     return rdai->chan_width;
0634 }
0635 
0636 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
0637 {
0638     if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
0639         return NULL;
0640 
0641     return priv->rdai + id;
0642 }
0643 
0644 static struct snd_soc_dai_driver
0645 *rsnd_daidrv_get(struct rsnd_priv *priv, int id)
0646 {
0647     if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
0648         return NULL;
0649 
0650     return priv->daidrv + id;
0651 }
0652 
0653 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
0654 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
0655 {
0656     struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
0657 
0658     return rsnd_rdai_get(priv, dai->id);
0659 }
0660 
0661 /*
0662  *  rsnd_soc_dai functions
0663  */
0664 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
0665 {
0666     struct snd_pcm_substream *substream = io->substream;
0667 
0668     /*
0669      * this function should be called...
0670      *
0671      * - if rsnd_dai_pointer_update() returns true
0672      * - without spin lock
0673      */
0674 
0675     snd_pcm_period_elapsed(substream);
0676 }
0677 
0678 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
0679                 struct snd_pcm_substream *substream)
0680 {
0681     io->substream       = substream;
0682 }
0683 
0684 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
0685 {
0686     io->substream       = NULL;
0687 }
0688 
0689 static
0690 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
0691 {
0692     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0693 
0694     return  asoc_rtd_to_cpu(rtd, 0);
0695 }
0696 
0697 static
0698 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
0699                     struct snd_pcm_substream *substream)
0700 {
0701     if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
0702         return &rdai->playback;
0703     else
0704         return &rdai->capture;
0705 }
0706 
0707 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
0708                 struct snd_soc_dai *dai)
0709 {
0710     struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
0711     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
0712     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
0713     int ret;
0714     unsigned long flags;
0715 
0716     spin_lock_irqsave(&priv->lock, flags);
0717 
0718     switch (cmd) {
0719     case SNDRV_PCM_TRIGGER_START:
0720     case SNDRV_PCM_TRIGGER_RESUME:
0721         ret = rsnd_dai_call(init, io, priv);
0722         if (ret < 0)
0723             goto dai_trigger_end;
0724 
0725         ret = rsnd_dai_call(start, io, priv);
0726         if (ret < 0)
0727             goto dai_trigger_end;
0728 
0729         ret = rsnd_dai_call(irq, io, priv, 1);
0730         if (ret < 0)
0731             goto dai_trigger_end;
0732 
0733         break;
0734     case SNDRV_PCM_TRIGGER_STOP:
0735     case SNDRV_PCM_TRIGGER_SUSPEND:
0736         ret = rsnd_dai_call(irq, io, priv, 0);
0737 
0738         ret |= rsnd_dai_call(stop, io, priv);
0739 
0740         ret |= rsnd_dai_call(quit, io, priv);
0741 
0742         break;
0743     default:
0744         ret = -EINVAL;
0745     }
0746 
0747 dai_trigger_end:
0748     spin_unlock_irqrestore(&priv->lock, flags);
0749 
0750     return ret;
0751 }
0752 
0753 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
0754 {
0755     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
0756 
0757     /* set clock master for audio interface */
0758     switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
0759     case SND_SOC_DAIFMT_BC_FC:
0760         rdai->clk_master = 0;
0761         break;
0762     case SND_SOC_DAIFMT_BP_FP:
0763         rdai->clk_master = 1; /* cpu is master */
0764         break;
0765     default:
0766         return -EINVAL;
0767     }
0768 
0769     /* set format */
0770     rdai->bit_clk_inv = 0;
0771     switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
0772     case SND_SOC_DAIFMT_I2S:
0773         rdai->sys_delay = 0;
0774         rdai->data_alignment = 0;
0775         rdai->frm_clk_inv = 0;
0776         break;
0777     case SND_SOC_DAIFMT_LEFT_J:
0778     case SND_SOC_DAIFMT_DSP_B:
0779         rdai->sys_delay = 1;
0780         rdai->data_alignment = 0;
0781         rdai->frm_clk_inv = 1;
0782         break;
0783     case SND_SOC_DAIFMT_RIGHT_J:
0784         rdai->sys_delay = 1;
0785         rdai->data_alignment = 1;
0786         rdai->frm_clk_inv = 1;
0787         break;
0788     case SND_SOC_DAIFMT_DSP_A:
0789         rdai->sys_delay = 0;
0790         rdai->data_alignment = 0;
0791         rdai->frm_clk_inv = 1;
0792         break;
0793     }
0794 
0795     /* set clock inversion */
0796     switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
0797     case SND_SOC_DAIFMT_NB_IF:
0798         rdai->frm_clk_inv = !rdai->frm_clk_inv;
0799         break;
0800     case SND_SOC_DAIFMT_IB_NF:
0801         rdai->bit_clk_inv = !rdai->bit_clk_inv;
0802         break;
0803     case SND_SOC_DAIFMT_IB_IF:
0804         rdai->bit_clk_inv = !rdai->bit_clk_inv;
0805         rdai->frm_clk_inv = !rdai->frm_clk_inv;
0806         break;
0807     case SND_SOC_DAIFMT_NB_NF:
0808     default:
0809         break;
0810     }
0811 
0812     return 0;
0813 }
0814 
0815 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
0816                      u32 tx_mask, u32 rx_mask,
0817                      int slots, int slot_width)
0818 {
0819     struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
0820     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
0821     struct device *dev = rsnd_priv_to_dev(priv);
0822 
0823     switch (slot_width) {
0824     case 16:
0825     case 24:
0826     case 32:
0827         break;
0828     default:
0829         /* use default */
0830         slot_width = 32;
0831     }
0832 
0833     switch (slots) {
0834     case 2:
0835         /* TDM Split Mode */
0836     case 6:
0837     case 8:
0838         /* TDM Extend Mode */
0839         rsnd_rdai_channels_set(rdai, slots);
0840         rsnd_rdai_ssi_lane_set(rdai, 1);
0841         rsnd_rdai_width_set(rdai, slot_width);
0842         break;
0843     default:
0844         dev_err(dev, "unsupported TDM slots (%d)\n", slots);
0845         return -EINVAL;
0846     }
0847 
0848     return 0;
0849 }
0850 
0851 static unsigned int rsnd_soc_hw_channels_list[] = {
0852     2, 6, 8,
0853 };
0854 
0855 static unsigned int rsnd_soc_hw_rate_list[] = {
0856       8000,
0857      11025,
0858      16000,
0859      22050,
0860      32000,
0861      44100,
0862      48000,
0863      64000,
0864      88200,
0865      96000,
0866     176400,
0867     192000,
0868 };
0869 
0870 static int rsnd_soc_hw_rule(struct rsnd_dai *rdai,
0871                 unsigned int *list, int list_num,
0872                 struct snd_interval *baseline, struct snd_interval *iv)
0873 {
0874     struct snd_interval p;
0875     unsigned int rate;
0876     int i;
0877 
0878     snd_interval_any(&p);
0879     p.min = UINT_MAX;
0880     p.max = 0;
0881 
0882     for (i = 0; i < list_num; i++) {
0883 
0884         if (!snd_interval_test(iv, list[i]))
0885             continue;
0886 
0887         rate = rsnd_ssi_clk_query(rdai,
0888                       baseline->min, list[i], NULL);
0889         if (rate > 0) {
0890             p.min = min(p.min, list[i]);
0891             p.max = max(p.max, list[i]);
0892         }
0893 
0894         rate = rsnd_ssi_clk_query(rdai,
0895                       baseline->max, list[i], NULL);
0896         if (rate > 0) {
0897             p.min = min(p.min, list[i]);
0898             p.max = max(p.max, list[i]);
0899         }
0900     }
0901 
0902     return snd_interval_refine(iv, &p);
0903 }
0904 
0905 static int rsnd_soc_hw_rule_rate(struct snd_pcm_hw_params *params,
0906                  struct snd_pcm_hw_rule *rule)
0907 {
0908     struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
0909     struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
0910     struct snd_interval ic;
0911     struct rsnd_dai_stream *io = rule->private;
0912     struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
0913 
0914     /*
0915      * possible sampling rate limitation is same as
0916      * 2ch if it supports multi ssi
0917      * and same as 8ch if TDM 6ch (see rsnd_ssi_config_init())
0918      */
0919     ic = *ic_;
0920     ic.min =
0921     ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
0922 
0923     return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_rate_list,
0924                 ARRAY_SIZE(rsnd_soc_hw_rate_list),
0925                 &ic, ir);
0926 }
0927 
0928 static int rsnd_soc_hw_rule_channels(struct snd_pcm_hw_params *params,
0929                      struct snd_pcm_hw_rule *rule)
0930 {
0931     struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
0932     struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
0933     struct snd_interval ic;
0934     struct rsnd_dai_stream *io = rule->private;
0935     struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
0936 
0937     /*
0938      * possible sampling rate limitation is same as
0939      * 2ch if it supports multi ssi
0940      * and same as 8ch if TDM 6ch (see rsnd_ssi_config_init())
0941      */
0942     ic = *ic_;
0943     ic.min =
0944     ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
0945 
0946     return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_channels_list,
0947                 ARRAY_SIZE(rsnd_soc_hw_channels_list),
0948                 ir, &ic);
0949 }
0950 
0951 static const struct snd_pcm_hardware rsnd_pcm_hardware = {
0952     .info =     SNDRV_PCM_INFO_INTERLEAVED  |
0953             SNDRV_PCM_INFO_MMAP     |
0954             SNDRV_PCM_INFO_MMAP_VALID,
0955     .buffer_bytes_max   = 64 * 1024,
0956     .period_bytes_min   = 32,
0957     .period_bytes_max   = 8192,
0958     .periods_min        = 1,
0959     .periods_max        = 32,
0960     .fifo_size      = 256,
0961 };
0962 
0963 static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
0964                 struct snd_soc_dai *dai)
0965 {
0966     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
0967     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
0968     struct snd_pcm_hw_constraint_list *constraint = &rdai->constraint;
0969     struct snd_pcm_runtime *runtime = substream->runtime;
0970     unsigned int max_channels = rsnd_rdai_channels_get(rdai);
0971     int i;
0972 
0973     rsnd_dai_stream_init(io, substream);
0974 
0975     /*
0976      * Channel Limitation
0977      * It depends on Platform design
0978      */
0979     constraint->list    = rsnd_soc_hw_channels_list;
0980     constraint->count   = 0;
0981     constraint->mask    = 0;
0982 
0983     for (i = 0; i < ARRAY_SIZE(rsnd_soc_hw_channels_list); i++) {
0984         if (rsnd_soc_hw_channels_list[i] > max_channels)
0985             break;
0986         constraint->count = i + 1;
0987     }
0988 
0989     snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
0990 
0991     snd_pcm_hw_constraint_list(runtime, 0,
0992                    SNDRV_PCM_HW_PARAM_CHANNELS, constraint);
0993 
0994     snd_pcm_hw_constraint_integer(runtime,
0995                       SNDRV_PCM_HW_PARAM_PERIODS);
0996 
0997     /*
0998      * Sampling Rate / Channel Limitation
0999      * It depends on Clock Master Mode
1000      */
1001     if (rsnd_rdai_is_clk_master(rdai)) {
1002         int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1003 
1004         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1005                     rsnd_soc_hw_rule_rate,
1006                     is_play ? &rdai->playback : &rdai->capture,
1007                     SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1008         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1009                     rsnd_soc_hw_rule_channels,
1010                     is_play ? &rdai->playback : &rdai->capture,
1011                     SNDRV_PCM_HW_PARAM_RATE, -1);
1012     }
1013 
1014     return 0;
1015 }
1016 
1017 static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
1018                   struct snd_soc_dai *dai)
1019 {
1020     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1021     struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1022     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1023 
1024     /*
1025      * call rsnd_dai_call without spinlock
1026      */
1027     rsnd_dai_call(cleanup, io, priv);
1028 
1029     rsnd_dai_stream_quit(io);
1030 }
1031 
1032 static int rsnd_soc_dai_prepare(struct snd_pcm_substream *substream,
1033                 struct snd_soc_dai *dai)
1034 {
1035     struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
1036     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1037     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1038 
1039     return rsnd_dai_call(prepare, io, priv);
1040 }
1041 
1042 static u64 rsnd_soc_dai_formats[] = {
1043     /*
1044      * 1st Priority
1045      *
1046      * Well tested formats.
1047      * Select below from Sound Card, not auto
1048      *  SND_SOC_DAIFMT_CBC_CFC
1049      *  SND_SOC_DAIFMT_CBP_CFP
1050      */
1051     SND_SOC_POSSIBLE_DAIFMT_I2S |
1052     SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
1053     SND_SOC_POSSIBLE_DAIFMT_LEFT_J  |
1054     SND_SOC_POSSIBLE_DAIFMT_NB_NF   |
1055     SND_SOC_POSSIBLE_DAIFMT_NB_IF   |
1056     SND_SOC_POSSIBLE_DAIFMT_IB_NF   |
1057     SND_SOC_POSSIBLE_DAIFMT_IB_IF,
1058     /*
1059      * 2nd Priority
1060      *
1061      * Supported, but not well tested
1062      */
1063     SND_SOC_POSSIBLE_DAIFMT_DSP_A   |
1064     SND_SOC_POSSIBLE_DAIFMT_DSP_B,
1065 };
1066 
1067 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
1068     .startup    = rsnd_soc_dai_startup,
1069     .shutdown   = rsnd_soc_dai_shutdown,
1070     .trigger    = rsnd_soc_dai_trigger,
1071     .set_fmt    = rsnd_soc_dai_set_fmt,
1072     .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
1073     .prepare    = rsnd_soc_dai_prepare,
1074     .auto_selectable_formats    = rsnd_soc_dai_formats,
1075     .num_auto_selectable_formats    = ARRAY_SIZE(rsnd_soc_dai_formats),
1076 };
1077 
1078 static void rsnd_parse_tdm_split_mode(struct rsnd_priv *priv,
1079                       struct rsnd_dai_stream *io,
1080                       struct device_node *dai_np)
1081 {
1082     struct device *dev = rsnd_priv_to_dev(priv);
1083     struct device_node *ssiu_np = rsnd_ssiu_of_node(priv);
1084     struct device_node *np;
1085     int is_play = rsnd_io_is_play(io);
1086     int i;
1087 
1088     if (!ssiu_np)
1089         return;
1090 
1091     /*
1092      * This driver assumes that it is TDM Split mode
1093      * if it includes ssiu node
1094      */
1095     for (i = 0;; i++) {
1096         struct device_node *node = is_play ?
1097             of_parse_phandle(dai_np, "playback", i) :
1098             of_parse_phandle(dai_np, "capture",  i);
1099 
1100         if (!node)
1101             break;
1102 
1103         for_each_child_of_node(ssiu_np, np) {
1104             if (np == node) {
1105                 rsnd_flags_set(io, RSND_STREAM_TDM_SPLIT);
1106                 dev_dbg(dev, "%s is part of TDM Split\n", io->name);
1107             }
1108         }
1109 
1110         of_node_put(node);
1111     }
1112 
1113     of_node_put(ssiu_np);
1114 }
1115 
1116 static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
1117                       struct rsnd_dai_stream *io,
1118                       struct device_node *dai_np)
1119 {
1120     if (!rsnd_io_to_mod_ssi(io))
1121         return;
1122 
1123     rsnd_parse_tdm_split_mode(priv, io, dai_np);
1124 }
1125 
1126 static void rsnd_parse_connect_graph(struct rsnd_priv *priv,
1127                      struct rsnd_dai_stream *io,
1128                      struct device_node *endpoint)
1129 {
1130     struct device *dev = rsnd_priv_to_dev(priv);
1131     struct device_node *remote_node;
1132 
1133     if (!rsnd_io_to_mod_ssi(io))
1134         return;
1135 
1136     remote_node = of_graph_get_remote_port_parent(endpoint);
1137 
1138     /* HDMI0 */
1139     if (strstr(remote_node->full_name, "hdmi@fead0000")) {
1140         rsnd_flags_set(io, RSND_STREAM_HDMI0);
1141         dev_dbg(dev, "%s connected to HDMI0\n", io->name);
1142     }
1143 
1144     /* HDMI1 */
1145     if (strstr(remote_node->full_name, "hdmi@feae0000")) {
1146         rsnd_flags_set(io, RSND_STREAM_HDMI1);
1147         dev_dbg(dev, "%s connected to HDMI1\n", io->name);
1148     }
1149 
1150     rsnd_parse_tdm_split_mode(priv, io, endpoint);
1151 
1152     of_node_put(remote_node);
1153 }
1154 
1155 void rsnd_parse_connect_common(struct rsnd_dai *rdai, char *name,
1156         struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
1157         struct device_node *node,
1158         struct device_node *playback,
1159         struct device_node *capture)
1160 {
1161     struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1162     struct device *dev = rsnd_priv_to_dev(priv);
1163     struct device_node *np;
1164     int i;
1165 
1166     if (!node)
1167         return;
1168 
1169     i = 0;
1170     for_each_child_of_node(node, np) {
1171         struct rsnd_mod *mod;
1172 
1173         i = rsnd_node_fixed_index(dev, np, name, i);
1174         if (i < 0) {
1175             of_node_put(np);
1176             break;
1177         }
1178 
1179         mod = mod_get(priv, i);
1180 
1181         if (np == playback)
1182             rsnd_dai_connect(mod, &rdai->playback, mod->type);
1183         if (np == capture)
1184             rsnd_dai_connect(mod, &rdai->capture, mod->type);
1185         i++;
1186     }
1187 
1188     of_node_put(node);
1189 }
1190 
1191 int rsnd_node_fixed_index(struct device *dev, struct device_node *node, char *name, int idx)
1192 {
1193     char node_name[16];
1194 
1195     /*
1196      * rsnd is assuming each device nodes are sequential numbering,
1197      * but some of them are not.
1198      * This function adjusts index for it.
1199      *
1200      * ex)
1201      * Normal case,     special case
1202      *  ssi-0
1203      *  ssi-1
1204      *  ssi-2
1205      *  ssi-3       ssi-3
1206      *  ssi-4       ssi-4
1207      *  ...
1208      *
1209      * assume Max 64 node
1210      */
1211     for (; idx < 64; idx++) {
1212         snprintf(node_name, sizeof(node_name), "%s-%d", name, idx);
1213 
1214         if (strncmp(node_name, of_node_full_name(node), sizeof(node_name)) == 0)
1215             return idx;
1216     }
1217 
1218     dev_err(dev, "strange node numbering (%s)",
1219         of_node_full_name(node));
1220     return -EINVAL;
1221 }
1222 
1223 int rsnd_node_count(struct rsnd_priv *priv, struct device_node *node, char *name)
1224 {
1225     struct device *dev = rsnd_priv_to_dev(priv);
1226     struct device_node *np;
1227     int i;
1228 
1229     i = 0;
1230     for_each_child_of_node(node, np) {
1231         i = rsnd_node_fixed_index(dev, np, name, i);
1232         if (i < 0) {
1233             of_node_put(np);
1234             return 0;
1235         }
1236         i++;
1237     }
1238 
1239     return i;
1240 }
1241 
1242 static struct device_node *rsnd_dai_of_node(struct rsnd_priv *priv,
1243                         int *is_graph)
1244 {
1245     struct device *dev = rsnd_priv_to_dev(priv);
1246     struct device_node *np = dev->of_node;
1247     struct device_node *dai_node;
1248     struct device_node *ret;
1249 
1250     *is_graph = 0;
1251 
1252     /*
1253      * parse both previous dai (= rcar_sound,dai), and
1254      * graph dai (= ports/port)
1255      */
1256     dai_node = of_get_child_by_name(np, RSND_NODE_DAI);
1257     if (dai_node) {
1258         ret = dai_node;
1259         goto of_node_compatible;
1260     }
1261 
1262     ret = np;
1263 
1264     dai_node = of_graph_get_next_endpoint(np, NULL);
1265     if (dai_node)
1266         goto of_node_graph;
1267 
1268     return NULL;
1269 
1270 of_node_graph:
1271     *is_graph = 1;
1272 of_node_compatible:
1273     of_node_put(dai_node);
1274 
1275     return ret;
1276 }
1277 
1278 
1279 #define PREALLOC_BUFFER     (32 * 1024)
1280 #define PREALLOC_BUFFER_MAX (32 * 1024)
1281 
1282 static int rsnd_preallocate_pages(struct snd_soc_pcm_runtime *rtd,
1283                   struct rsnd_dai_stream *io,
1284                   int stream)
1285 {
1286     struct rsnd_priv *priv = rsnd_io_to_priv(io);
1287     struct device *dev = rsnd_priv_to_dev(priv);
1288     struct snd_pcm_substream *substream;
1289 
1290     /*
1291      * use Audio-DMAC dev if we can use IPMMU
1292      * see
1293      *  rsnd_dmaen_attach()
1294      */
1295     if (io->dmac_dev)
1296         dev = io->dmac_dev;
1297 
1298     for (substream = rtd->pcm->streams[stream].substream;
1299          substream;
1300          substream = substream->next) {
1301         snd_pcm_set_managed_buffer(substream,
1302                        SNDRV_DMA_TYPE_DEV,
1303                        dev,
1304                        PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1305     }
1306 
1307     return 0;
1308 }
1309 
1310 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd,
1311             struct snd_soc_dai *dai)
1312 {
1313     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1314     int ret;
1315 
1316     ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1317     if (ret)
1318         return ret;
1319 
1320     ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1321     if (ret)
1322         return ret;
1323 
1324     ret = rsnd_preallocate_pages(rtd, &rdai->playback,
1325                      SNDRV_PCM_STREAM_PLAYBACK);
1326     if (ret)
1327         return ret;
1328 
1329     ret = rsnd_preallocate_pages(rtd, &rdai->capture,
1330                      SNDRV_PCM_STREAM_CAPTURE);
1331     if (ret)
1332         return ret;
1333 
1334     return 0;
1335 }
1336 
1337 static void __rsnd_dai_probe(struct rsnd_priv *priv,
1338                  struct device_node *dai_np,
1339                  int dai_i)
1340 {
1341     struct rsnd_dai_stream *io_playback;
1342     struct rsnd_dai_stream *io_capture;
1343     struct snd_soc_dai_driver *drv;
1344     struct rsnd_dai *rdai;
1345     struct device *dev = rsnd_priv_to_dev(priv);
1346     int io_i;
1347 
1348     rdai        = rsnd_rdai_get(priv, dai_i);
1349     drv     = rsnd_daidrv_get(priv, dai_i);
1350     io_playback = &rdai->playback;
1351     io_capture  = &rdai->capture;
1352 
1353     snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
1354 
1355     rdai->priv  = priv;
1356     drv->name   = rdai->name;
1357     drv->ops    = &rsnd_soc_dai_ops;
1358     drv->pcm_new    = rsnd_pcm_new;
1359 
1360     snprintf(io_playback->name, RSND_DAI_NAME_SIZE,
1361          "DAI%d Playback", dai_i);
1362     drv->playback.rates     = RSND_RATES;
1363     drv->playback.formats       = RSND_FMTS;
1364     drv->playback.channels_min  = 2;
1365     drv->playback.channels_max  = 8;
1366     drv->playback.stream_name   = io_playback->name;
1367 
1368     snprintf(io_capture->name, RSND_DAI_NAME_SIZE,
1369          "DAI%d Capture", dai_i);
1370     drv->capture.rates      = RSND_RATES;
1371     drv->capture.formats        = RSND_FMTS;
1372     drv->capture.channels_min   = 2;
1373     drv->capture.channels_max   = 8;
1374     drv->capture.stream_name    = io_capture->name;
1375 
1376     io_playback->rdai       = rdai;
1377     io_capture->rdai        = rdai;
1378     rsnd_rdai_channels_set(rdai, 2); /* default 2ch */
1379     rsnd_rdai_ssi_lane_set(rdai, 1); /* default 1lane */
1380     rsnd_rdai_width_set(rdai, 32);   /* default 32bit width */
1381 
1382     for (io_i = 0;; io_i++) {
1383         struct device_node *playback = of_parse_phandle(dai_np, "playback", io_i);
1384         struct device_node *capture  = of_parse_phandle(dai_np, "capture", io_i);
1385 
1386         if (!playback && !capture)
1387             break;
1388 
1389         rsnd_parse_connect_ssi(rdai, playback, capture);
1390         rsnd_parse_connect_ssiu(rdai, playback, capture);
1391         rsnd_parse_connect_src(rdai, playback, capture);
1392         rsnd_parse_connect_ctu(rdai, playback, capture);
1393         rsnd_parse_connect_mix(rdai, playback, capture);
1394         rsnd_parse_connect_dvc(rdai, playback, capture);
1395 
1396         of_node_put(playback);
1397         of_node_put(capture);
1398     }
1399 
1400     if (rsnd_ssi_is_pin_sharing(io_capture) ||
1401         rsnd_ssi_is_pin_sharing(io_playback)) {
1402         /* should have symmetric_rate if pin sharing */
1403         drv->symmetric_rate = 1;
1404     }
1405 
1406     dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
1407         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
1408         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
1409 }
1410 
1411 static int rsnd_dai_probe(struct rsnd_priv *priv)
1412 {
1413     struct device_node *dai_node;
1414     struct device_node *dai_np;
1415     struct snd_soc_dai_driver *rdrv;
1416     struct device *dev = rsnd_priv_to_dev(priv);
1417     struct rsnd_dai *rdai;
1418     int nr;
1419     int is_graph;
1420     int dai_i;
1421 
1422     dai_node = rsnd_dai_of_node(priv, &is_graph);
1423     if (is_graph)
1424         nr = of_graph_get_endpoint_count(dai_node);
1425     else
1426         nr = of_get_child_count(dai_node);
1427 
1428     if (!nr)
1429         return -EINVAL;
1430 
1431     rdrv = devm_kcalloc(dev, nr, sizeof(*rdrv), GFP_KERNEL);
1432     rdai = devm_kcalloc(dev, nr, sizeof(*rdai), GFP_KERNEL);
1433     if (!rdrv || !rdai)
1434         return -ENOMEM;
1435 
1436     priv->rdai_nr   = nr;
1437     priv->daidrv    = rdrv;
1438     priv->rdai  = rdai;
1439 
1440     /*
1441      * parse all dai
1442      */
1443     dai_i = 0;
1444     if (is_graph) {
1445         for_each_endpoint_of_node(dai_node, dai_np) {
1446             __rsnd_dai_probe(priv, dai_np, dai_i);
1447             if (rsnd_is_gen3(priv)) {
1448                 rdai = rsnd_rdai_get(priv, dai_i);
1449 
1450                 rsnd_parse_connect_graph(priv, &rdai->playback, dai_np);
1451                 rsnd_parse_connect_graph(priv, &rdai->capture,  dai_np);
1452             }
1453             dai_i++;
1454         }
1455     } else {
1456         for_each_child_of_node(dai_node, dai_np) {
1457             __rsnd_dai_probe(priv, dai_np, dai_i);
1458             if (rsnd_is_gen3(priv)) {
1459                 rdai = rsnd_rdai_get(priv, dai_i);
1460 
1461                 rsnd_parse_connect_simple(priv, &rdai->playback, dai_np);
1462                 rsnd_parse_connect_simple(priv, &rdai->capture,  dai_np);
1463             }
1464             dai_i++;
1465         }
1466     }
1467 
1468     return 0;
1469 }
1470 
1471 /*
1472  *      pcm ops
1473  */
1474 static int rsnd_hw_update(struct snd_pcm_substream *substream,
1475               struct snd_pcm_hw_params *hw_params)
1476 {
1477     struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1478     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1479     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1480     struct rsnd_priv *priv = rsnd_io_to_priv(io);
1481     unsigned long flags;
1482     int ret;
1483 
1484     spin_lock_irqsave(&priv->lock, flags);
1485     if (hw_params)
1486         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
1487     else
1488         ret = rsnd_dai_call(hw_free, io, substream);
1489     spin_unlock_irqrestore(&priv->lock, flags);
1490 
1491     return ret;
1492 }
1493 
1494 static int rsnd_hw_params(struct snd_soc_component *component,
1495               struct snd_pcm_substream *substream,
1496               struct snd_pcm_hw_params *hw_params)
1497 {
1498     struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1499     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1500     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1501     struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1502 
1503     /*
1504      * rsnd assumes that it might be used under DPCM if user want to use
1505      * channel / rate convert. Then, rsnd should be FE.
1506      * And then, this function will be called *after* BE settings.
1507      * this means, each BE already has fixuped hw_params.
1508      * see
1509      *  dpcm_fe_dai_hw_params()
1510      *  dpcm_be_dai_hw_params()
1511      */
1512     io->converted_rate = 0;
1513     io->converted_chan = 0;
1514     if (fe->dai_link->dynamic) {
1515         struct rsnd_priv *priv = rsnd_io_to_priv(io);
1516         struct device *dev = rsnd_priv_to_dev(priv);
1517         struct snd_soc_dpcm *dpcm;
1518         int stream = substream->stream;
1519 
1520         for_each_dpcm_be(fe, stream, dpcm) {
1521             struct snd_pcm_hw_params *be_params = &dpcm->hw_params;
1522 
1523             if (params_channels(hw_params) != params_channels(be_params))
1524                 io->converted_chan = params_channels(be_params);
1525             if (params_rate(hw_params) != params_rate(be_params))
1526                 io->converted_rate = params_rate(be_params);
1527         }
1528         if (io->converted_chan)
1529             dev_dbg(dev, "convert channels = %d\n", io->converted_chan);
1530         if (io->converted_rate) {
1531             /*
1532              * SRC supports convert rates from params_rate(hw_params)/k_down
1533              * to params_rate(hw_params)*k_up, where k_up is always 6, and
1534              * k_down depends on number of channels and SRC unit.
1535              * So all SRC units can upsample audio up to 6 times regardless
1536              * its number of channels. And all SRC units can downsample
1537              * 2 channel audio up to 6 times too.
1538              */
1539             int k_up = 6;
1540             int k_down = 6;
1541             int channel;
1542             struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
1543 
1544             dev_dbg(dev, "convert rate     = %d\n", io->converted_rate);
1545 
1546             channel = io->converted_chan ? io->converted_chan :
1547                   params_channels(hw_params);
1548 
1549             switch (rsnd_mod_id(src_mod)) {
1550             /*
1551              * SRC0 can downsample 4, 6 and 8 channel audio up to 4 times.
1552              * SRC1, SRC3 and SRC4 can downsample 4 channel audio
1553              * up to 4 times.
1554              * SRC1, SRC3 and SRC4 can downsample 6 and 8 channel audio
1555              * no more than twice.
1556              */
1557             case 1:
1558             case 3:
1559             case 4:
1560                 if (channel > 4) {
1561                     k_down = 2;
1562                     break;
1563                 }
1564                 fallthrough;
1565             case 0:
1566                 if (channel > 2)
1567                     k_down = 4;
1568                 break;
1569 
1570             /* Other SRC units do not support more than 2 channels */
1571             default:
1572                 if (channel > 2)
1573                     return -EINVAL;
1574             }
1575 
1576             if (params_rate(hw_params) > io->converted_rate * k_down) {
1577                 hw_param_interval(hw_params, SNDRV_PCM_HW_PARAM_RATE)->min =
1578                     io->converted_rate * k_down;
1579                 hw_param_interval(hw_params, SNDRV_PCM_HW_PARAM_RATE)->max =
1580                     io->converted_rate * k_down;
1581                 hw_params->cmask |= SNDRV_PCM_HW_PARAM_RATE;
1582             } else if (params_rate(hw_params) * k_up < io->converted_rate) {
1583                 hw_param_interval(hw_params, SNDRV_PCM_HW_PARAM_RATE)->min =
1584                     (io->converted_rate + k_up - 1) / k_up;
1585                 hw_param_interval(hw_params, SNDRV_PCM_HW_PARAM_RATE)->max =
1586                     (io->converted_rate + k_up - 1) / k_up;
1587                 hw_params->cmask |= SNDRV_PCM_HW_PARAM_RATE;
1588             }
1589 
1590             /*
1591              * TBD: Max SRC input and output rates also depend on number
1592              * of channels and SRC unit:
1593              * SRC1, SRC3 and SRC4 do not support more than 128kHz
1594              * for 6 channel and 96kHz for 8 channel audio.
1595              * Perhaps this function should return EINVAL if the input or
1596              * the output rate exceeds the limitation.
1597              */
1598         }
1599     }
1600 
1601     return rsnd_hw_update(substream, hw_params);
1602 }
1603 
1604 static int rsnd_hw_free(struct snd_soc_component *component,
1605             struct snd_pcm_substream *substream)
1606 {
1607     return rsnd_hw_update(substream, NULL);
1608 }
1609 
1610 static snd_pcm_uframes_t rsnd_pointer(struct snd_soc_component *component,
1611                       struct snd_pcm_substream *substream)
1612 {
1613     struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1614     struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1615     struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1616     snd_pcm_uframes_t pointer = 0;
1617 
1618     rsnd_dai_call(pointer, io, &pointer);
1619 
1620     return pointer;
1621 }
1622 
1623 /*
1624  *      snd_kcontrol
1625  */
1626 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
1627                struct snd_ctl_elem_info *uinfo)
1628 {
1629     struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1630 
1631     if (cfg->texts) {
1632         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1633         uinfo->count = cfg->size;
1634         uinfo->value.enumerated.items = cfg->max;
1635         if (uinfo->value.enumerated.item >= cfg->max)
1636             uinfo->value.enumerated.item = cfg->max - 1;
1637         strscpy(uinfo->value.enumerated.name,
1638             cfg->texts[uinfo->value.enumerated.item],
1639             sizeof(uinfo->value.enumerated.name));
1640     } else {
1641         uinfo->count = cfg->size;
1642         uinfo->value.integer.min = 0;
1643         uinfo->value.integer.max = cfg->max;
1644         uinfo->type = (cfg->max == 1) ?
1645             SNDRV_CTL_ELEM_TYPE_BOOLEAN :
1646             SNDRV_CTL_ELEM_TYPE_INTEGER;
1647     }
1648 
1649     return 0;
1650 }
1651 
1652 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
1653               struct snd_ctl_elem_value *uc)
1654 {
1655     struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1656     int i;
1657 
1658     for (i = 0; i < cfg->size; i++)
1659         if (cfg->texts)
1660             uc->value.enumerated.item[i] = cfg->val[i];
1661         else
1662             uc->value.integer.value[i] = cfg->val[i];
1663 
1664     return 0;
1665 }
1666 
1667 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1668               struct snd_ctl_elem_value *uc)
1669 {
1670     struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1671     int i, change = 0;
1672 
1673     if (!cfg->accept(cfg->io))
1674         return 0;
1675 
1676     for (i = 0; i < cfg->size; i++) {
1677         if (cfg->texts) {
1678             change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1679             cfg->val[i] = uc->value.enumerated.item[i];
1680         } else {
1681             change |= (uc->value.integer.value[i] != cfg->val[i]);
1682             cfg->val[i] = uc->value.integer.value[i];
1683         }
1684     }
1685 
1686     if (change && cfg->update)
1687         cfg->update(cfg->io, cfg->mod);
1688 
1689     return change;
1690 }
1691 
1692 int rsnd_kctrl_accept_anytime(struct rsnd_dai_stream *io)
1693 {
1694     return 1;
1695 }
1696 
1697 int rsnd_kctrl_accept_runtime(struct rsnd_dai_stream *io)
1698 {
1699     struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
1700     struct rsnd_priv *priv = rsnd_io_to_priv(io);
1701     struct device *dev = rsnd_priv_to_dev(priv);
1702 
1703     if (!runtime) {
1704         dev_warn(dev, "Can't update kctrl when idle\n");
1705         return 0;
1706     }
1707 
1708     return 1;
1709 }
1710 
1711 struct rsnd_kctrl_cfg *rsnd_kctrl_init_m(struct rsnd_kctrl_cfg_m *cfg)
1712 {
1713     cfg->cfg.val = cfg->val;
1714 
1715     return &cfg->cfg;
1716 }
1717 
1718 struct rsnd_kctrl_cfg *rsnd_kctrl_init_s(struct rsnd_kctrl_cfg_s *cfg)
1719 {
1720     cfg->cfg.val = &cfg->val;
1721 
1722     return &cfg->cfg;
1723 }
1724 
1725 const char * const volume_ramp_rate[] = {
1726     "128 dB/1 step",     /* 00000 */
1727     "64 dB/1 step",      /* 00001 */
1728     "32 dB/1 step",      /* 00010 */
1729     "16 dB/1 step",      /* 00011 */
1730     "8 dB/1 step",       /* 00100 */
1731     "4 dB/1 step",       /* 00101 */
1732     "2 dB/1 step",       /* 00110 */
1733     "1 dB/1 step",       /* 00111 */
1734     "0.5 dB/1 step",     /* 01000 */
1735     "0.25 dB/1 step",    /* 01001 */
1736     "0.125 dB/1 step",   /* 01010 = VOLUME_RAMP_MAX_MIX */
1737     "0.125 dB/2 steps",  /* 01011 */
1738     "0.125 dB/4 steps",  /* 01100 */
1739     "0.125 dB/8 steps",  /* 01101 */
1740     "0.125 dB/16 steps",     /* 01110 */
1741     "0.125 dB/32 steps",     /* 01111 */
1742     "0.125 dB/64 steps",     /* 10000 */
1743     "0.125 dB/128 steps",    /* 10001 */
1744     "0.125 dB/256 steps",    /* 10010 */
1745     "0.125 dB/512 steps",    /* 10011 */
1746     "0.125 dB/1024 steps",   /* 10100 */
1747     "0.125 dB/2048 steps",   /* 10101 */
1748     "0.125 dB/4096 steps",   /* 10110 */
1749     "0.125 dB/8192 steps",   /* 10111 = VOLUME_RAMP_MAX_DVC */
1750 };
1751 
1752 int rsnd_kctrl_new(struct rsnd_mod *mod,
1753            struct rsnd_dai_stream *io,
1754            struct snd_soc_pcm_runtime *rtd,
1755            const unsigned char *name,
1756            int (*accept)(struct rsnd_dai_stream *io),
1757            void (*update)(struct rsnd_dai_stream *io,
1758                   struct rsnd_mod *mod),
1759            struct rsnd_kctrl_cfg *cfg,
1760            const char * const *texts,
1761            int size,
1762            u32 max)
1763 {
1764     struct snd_card *card = rtd->card->snd_card;
1765     struct snd_kcontrol *kctrl;
1766     struct snd_kcontrol_new knew = {
1767         .iface      = SNDRV_CTL_ELEM_IFACE_MIXER,
1768         .name       = name,
1769         .info       = rsnd_kctrl_info,
1770         .index      = rtd->num,
1771         .get        = rsnd_kctrl_get,
1772         .put        = rsnd_kctrl_put,
1773     };
1774     int ret;
1775 
1776     /*
1777      * 1) Avoid duplicate register for DVC with MIX case
1778      * 2) Allow duplicate register for MIX
1779      * 3) re-register if card was rebinded
1780      */
1781     list_for_each_entry(kctrl, &card->controls, list) {
1782         struct rsnd_kctrl_cfg *c = kctrl->private_data;
1783 
1784         if (c == cfg)
1785             return 0;
1786     }
1787 
1788     if (size > RSND_MAX_CHANNELS)
1789         return -EINVAL;
1790 
1791     kctrl = snd_ctl_new1(&knew, cfg);
1792     if (!kctrl)
1793         return -ENOMEM;
1794 
1795     ret = snd_ctl_add(card, kctrl);
1796     if (ret < 0)
1797         return ret;
1798 
1799     cfg->texts  = texts;
1800     cfg->max    = max;
1801     cfg->size   = size;
1802     cfg->accept = accept;
1803     cfg->update = update;
1804     cfg->card   = card;
1805     cfg->kctrl  = kctrl;
1806     cfg->io     = io;
1807     cfg->mod    = mod;
1808 
1809     return 0;
1810 }
1811 
1812 /*
1813  *      snd_soc_component
1814  */
1815 static const struct snd_soc_component_driver rsnd_soc_component = {
1816     .name           = "rsnd",
1817     .probe          = rsnd_debugfs_probe,
1818     .hw_params      = rsnd_hw_params,
1819     .hw_free        = rsnd_hw_free,
1820     .pointer        = rsnd_pointer,
1821     .legacy_dai_naming  = 1,
1822 };
1823 
1824 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1825                        struct rsnd_dai_stream *io)
1826 {
1827     int ret;
1828 
1829     ret = rsnd_dai_call(probe, io, priv);
1830     if (ret == -EAGAIN) {
1831         struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1832         struct rsnd_mod *mod;
1833         int i;
1834 
1835         /*
1836          * Fallback to PIO mode
1837          */
1838 
1839         /*
1840          * call "remove" for SSI/SRC/DVC
1841          * SSI will be switch to PIO mode if it was DMA mode
1842          * see
1843          *  rsnd_dma_init()
1844          *  rsnd_ssi_fallback()
1845          */
1846         rsnd_dai_call(remove, io, priv);
1847 
1848         /*
1849          * remove all mod from io
1850          * and, re connect ssi
1851          */
1852         for_each_rsnd_mod(i, mod, io)
1853             rsnd_dai_disconnect(mod, io, i);
1854         rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1855 
1856         /*
1857          * fallback
1858          */
1859         rsnd_dai_call(fallback, io, priv);
1860 
1861         /*
1862          * retry to "probe".
1863          * DAI has SSI which is PIO mode only now.
1864          */
1865         ret = rsnd_dai_call(probe, io, priv);
1866     }
1867 
1868     return ret;
1869 }
1870 
1871 /*
1872  *  rsnd probe
1873  */
1874 static int rsnd_probe(struct platform_device *pdev)
1875 {
1876     struct rsnd_priv *priv;
1877     struct device *dev = &pdev->dev;
1878     struct rsnd_dai *rdai;
1879     int (*probe_func[])(struct rsnd_priv *priv) = {
1880         rsnd_gen_probe,
1881         rsnd_dma_probe,
1882         rsnd_ssi_probe,
1883         rsnd_ssiu_probe,
1884         rsnd_src_probe,
1885         rsnd_ctu_probe,
1886         rsnd_mix_probe,
1887         rsnd_dvc_probe,
1888         rsnd_cmd_probe,
1889         rsnd_adg_probe,
1890         rsnd_dai_probe,
1891     };
1892     int ret, i;
1893 
1894     /*
1895      *  init priv data
1896      */
1897     priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1898     if (!priv)
1899         return -ENODEV;
1900 
1901     priv->pdev  = pdev;
1902     priv->flags = (unsigned long)of_device_get_match_data(dev);
1903     spin_lock_init(&priv->lock);
1904 
1905     /*
1906      *  init each module
1907      */
1908     for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1909         ret = probe_func[i](priv);
1910         if (ret)
1911             return ret;
1912     }
1913 
1914     for_each_rsnd_dai(rdai, priv, i) {
1915         ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1916         if (ret)
1917             goto exit_snd_probe;
1918 
1919         ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1920         if (ret)
1921             goto exit_snd_probe;
1922     }
1923 
1924     dev_set_drvdata(dev, priv);
1925 
1926     /*
1927      *  asoc register
1928      */
1929     ret = devm_snd_soc_register_component(dev, &rsnd_soc_component,
1930                      priv->daidrv, rsnd_rdai_nr(priv));
1931     if (ret < 0) {
1932         dev_err(dev, "cannot snd dai register\n");
1933         goto exit_snd_probe;
1934     }
1935 
1936     pm_runtime_enable(dev);
1937 
1938     dev_info(dev, "probed\n");
1939     return ret;
1940 
1941 exit_snd_probe:
1942     for_each_rsnd_dai(rdai, priv, i) {
1943         rsnd_dai_call(remove, &rdai->playback, priv);
1944         rsnd_dai_call(remove, &rdai->capture, priv);
1945     }
1946 
1947     /*
1948      * adg is very special mod which can't use rsnd_dai_call(remove),
1949      * and it registers ADG clock on probe.
1950      * It should be unregister if probe failed.
1951      * Mainly it is assuming -EPROBE_DEFER case
1952      */
1953     rsnd_adg_remove(priv);
1954 
1955     return ret;
1956 }
1957 
1958 static int rsnd_remove(struct platform_device *pdev)
1959 {
1960     struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1961     struct rsnd_dai *rdai;
1962     void (*remove_func[])(struct rsnd_priv *priv) = {
1963         rsnd_ssi_remove,
1964         rsnd_ssiu_remove,
1965         rsnd_src_remove,
1966         rsnd_ctu_remove,
1967         rsnd_mix_remove,
1968         rsnd_dvc_remove,
1969         rsnd_cmd_remove,
1970         rsnd_adg_remove,
1971     };
1972     int i;
1973 
1974     pm_runtime_disable(&pdev->dev);
1975 
1976     for_each_rsnd_dai(rdai, priv, i) {
1977         int ret;
1978 
1979         ret = rsnd_dai_call(remove, &rdai->playback, priv);
1980         if (ret)
1981             dev_warn(&pdev->dev, "Failed to remove playback dai #%d\n", i);
1982 
1983         ret = rsnd_dai_call(remove, &rdai->capture, priv);
1984         if (ret)
1985             dev_warn(&pdev->dev, "Failed to remove capture dai #%d\n", i);
1986     }
1987 
1988     for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1989         remove_func[i](priv);
1990 
1991     return 0;
1992 }
1993 
1994 static int __maybe_unused rsnd_suspend(struct device *dev)
1995 {
1996     struct rsnd_priv *priv = dev_get_drvdata(dev);
1997 
1998     rsnd_adg_clk_disable(priv);
1999 
2000     return 0;
2001 }
2002 
2003 static int __maybe_unused rsnd_resume(struct device *dev)
2004 {
2005     struct rsnd_priv *priv = dev_get_drvdata(dev);
2006 
2007     rsnd_adg_clk_enable(priv);
2008 
2009     return 0;
2010 }
2011 
2012 static const struct dev_pm_ops rsnd_pm_ops = {
2013     SET_SYSTEM_SLEEP_PM_OPS(rsnd_suspend, rsnd_resume)
2014 };
2015 
2016 static struct platform_driver rsnd_driver = {
2017     .driver = {
2018         .name   = "rcar_sound",
2019         .pm = &rsnd_pm_ops,
2020         .of_match_table = rsnd_of_match,
2021     },
2022     .probe      = rsnd_probe,
2023     .remove     = rsnd_remove,
2024 };
2025 module_platform_driver(rsnd_driver);
2026 
2027 MODULE_LICENSE("GPL v2");
2028 MODULE_DESCRIPTION("Renesas R-Car audio driver");
2029 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
2030 MODULE_ALIAS("platform:rcar-pcm-audio");
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