sound/soc/sh/rcar/dvc.c

   1 /*
   2  * Renesas R-Car DVC support
   3  *
   4  * Copyright (C) 2014 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 /*
  13  * Playback Volume
  14  *      amixer set "DVC Out" 100%
  15  *
  16  * Capture Volume
  17  *      amixer set "DVC In" 100%
  18  *
  19  * Playback Mute
  20  *      amixer set "DVC Out Mute" on
  21  *
  22  * Capture Mute
  23  *      amixer set "DVC In Mute" on
  24  *
  25  * Volume Ramp
  26  *      amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
  27  *      amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
  28  *      amixer set "DVC Out Ramp" on
  29  *      aplay xxx.wav &
  30  *      amixer set "DVC Out"  80%  // Volume Down
  31  *      amixer set "DVC Out" 100%  // Volume Up
  32  */
  33
  34 #include "rsnd.h"
  35
  36 #define RSND_DVC_NAME_SIZE      16
  37
  38 #define DVC_NAME "dvc"
  39
  40 struct rsnd_dvc {
  41         struct rsnd_mod mod;
  42         struct rsnd_kctrl_cfg_m volume;
  43         struct rsnd_kctrl_cfg_m mute;
  44         struct rsnd_kctrl_cfg_s ren;    /* Ramp Enable */
  45         struct rsnd_kctrl_cfg_s rup;    /* Ramp Rate Up */
  46         struct rsnd_kctrl_cfg_s rdown;  /* Ramp Rate Down */
  47 };
  48
  49 #define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id)
  50 #define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
  51 #define rsnd_dvc_of_node(priv) \
  52         of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,dvc")
  53
  54 #define rsnd_mod_to_dvc(_mod)   \
  55         container_of((_mod), struct rsnd_dvc, mod)
  56
  57 #define for_each_rsnd_dvc(pos, priv, i)                         \
  58         for ((i) = 0;                                           \
  59              ((i) < rsnd_dvc_nr(priv)) &&                       \
  60              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  61              i++)
  62
  63 static const char * const dvc_ramp_rate[] = {
  64         "128 dB/1 step",         /* 00000 */
  65         "64 dB/1 step",          /* 00001 */
  66         "32 dB/1 step",          /* 00010 */
  67         "16 dB/1 step",          /* 00011 */
  68         "8 dB/1 step",           /* 00100 */
  69         "4 dB/1 step",           /* 00101 */
  70         "2 dB/1 step",           /* 00110 */
  71         "1 dB/1 step",           /* 00111 */
  72         "0.5 dB/1 step",         /* 01000 */
  73         "0.25 dB/1 step",        /* 01001 */
  74         "0.125 dB/1 step",       /* 01010 */
  75         "0.125 dB/2 steps",      /* 01011 */
  76         "0.125 dB/4 steps",      /* 01100 */
  77         "0.125 dB/8 steps",      /* 01101 */
  78         "0.125 dB/16 steps",     /* 01110 */
  79         "0.125 dB/32 steps",     /* 01111 */
  80         "0.125 dB/64 steps",     /* 10000 */
  81         "0.125 dB/128 steps",    /* 10001 */
  82         "0.125 dB/256 steps",    /* 10010 */
  83         "0.125 dB/512 steps",    /* 10011 */
  84         "0.125 dB/1024 steps",   /* 10100 */
  85         "0.125 dB/2048 steps",   /* 10101 */
  86         "0.125 dB/4096 steps",   /* 10110 */
  87         "0.125 dB/8192 steps",   /* 10111 */
  88 };
  89
  90 static void rsnd_dvc_activation(struct rsnd_mod *mod)
  91 {
  92         rsnd_mod_write(mod, DVC_SWRSR, 0);
  93         rsnd_mod_write(mod, DVC_SWRSR, 1);
  94 }
  95
  96 static void rsnd_dvc_halt(struct rsnd_mod *mod)
  97 {
  98         rsnd_mod_write(mod, DVC_DVUIR, 1);
  99         rsnd_mod_write(mod, DVC_SWRSR, 0);
 100 }
 101
 102 #define rsnd_dvc_get_vrpdr(dvc) (dvc->rup.val << 8 | dvc->rdown.val)
 103 #define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (dvc->volume.val[0] >> 13))
 104
 105 static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io,
 106                                               struct rsnd_mod *mod)
 107 {
 108         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 109         u32 val[RSND_MAX_CHANNELS];
 110         int i;
 111
 112         /* Enable Ramp */
 113         if (dvc->ren.val)
 114                 for (i = 0; i < RSND_MAX_CHANNELS; i++)
 115                         val[i] = dvc->volume.cfg.max;
 116         else
 117                 for (i = 0; i < RSND_MAX_CHANNELS; i++)
 118                         val[i] = dvc->volume.val[i];
 119
 120         /* Enable Digital Volume */
 121         rsnd_mod_write(mod, DVC_VOL0R, val[0]);
 122         rsnd_mod_write(mod, DVC_VOL1R, val[1]);
 123         rsnd_mod_write(mod, DVC_VOL2R, val[2]);
 124         rsnd_mod_write(mod, DVC_VOL3R, val[3]);
 125         rsnd_mod_write(mod, DVC_VOL4R, val[4]);
 126         rsnd_mod_write(mod, DVC_VOL5R, val[5]);
 127         rsnd_mod_write(mod, DVC_VOL6R, val[6]);
 128         rsnd_mod_write(mod, DVC_VOL7R, val[7]);
 129 }
 130
 131 static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
 132                                  struct rsnd_mod *mod)
 133 {
 134         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 135         u32 adinr = 0;
 136         u32 dvucr = 0;
 137         u32 vrctr = 0;
 138         u32 vrpdr = 0;
 139         u32 vrdbr = 0;
 140
 141         adinr = rsnd_get_adinr_bit(mod, io) |
 142                 rsnd_runtime_channel_after_ctu(io);
 143
 144         /* Enable Digital Volume, Zero Cross Mute Mode */
 145         dvucr |= 0x101;
 146
 147         /* Enable Ramp */
 148         if (dvc->ren.val) {
 149                 dvucr |= 0x10;
 150
 151                 /*
 152                  * FIXME !!
 153                  * use scale-downed Digital Volume
 154                  * as Volume Ramp
 155                  * 7F FFFF -> 3FF
 156                  */
 157                 vrctr = 0xff;
 158                 vrpdr = rsnd_dvc_get_vrpdr(dvc);
 159                 vrdbr = rsnd_dvc_get_vrdbr(dvc);
 160         }
 161
 162         /* Initialize operation */
 163         rsnd_mod_write(mod, DVC_DVUIR, 1);
 164
 165         /* General Information */
 166         rsnd_mod_write(mod, DVC_ADINR, adinr);
 167         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
 168
 169         /* Volume Ramp Parameter */
 170         rsnd_mod_write(mod, DVC_VRCTR, vrctr);
 171         rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
 172         rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
 173
 174         /* Digital Volume Function Parameter */
 175         rsnd_dvc_volume_parameter(io, mod);
 176
 177         /* cancel operation */
 178         rsnd_mod_write(mod, DVC_DVUIR, 0);
 179 }
 180
 181 static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io,
 182                                    struct rsnd_mod *mod)
 183 {
 184         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 185         u32 zcmcr = 0;
 186         u32 vrpdr = 0;
 187         u32 vrdbr = 0;
 188         int i;
 189
 190         for (i = 0; i < dvc->mute.cfg.size; i++)
 191                 zcmcr |= (!!dvc->mute.cfg.val[i]) << i;
 192
 193         if (dvc->ren.val) {
 194                 vrpdr = rsnd_dvc_get_vrpdr(dvc);
 195                 vrdbr = rsnd_dvc_get_vrdbr(dvc);
 196         }
 197
 198         /* Disable DVC Register access */
 199         rsnd_mod_write(mod, DVC_DVUER, 0);
 200
 201         /* Zero Cross Mute Function */
 202         rsnd_mod_write(mod, DVC_ZCMCR, zcmcr);
 203
 204         /* Volume Ramp Function */
 205         rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
 206         rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
 207         /* add DVC_VRWTR here */
 208
 209         /* Digital Volume Function Parameter */
 210         rsnd_dvc_volume_parameter(io, mod);
 211
 212         /* Enable DVC Register access */
 213         rsnd_mod_write(mod, DVC_DVUER, 1);
 214 }
 215
 216 static int rsnd_dvc_probe_(struct rsnd_mod *mod,
 217                            struct rsnd_dai_stream *io,
 218                            struct rsnd_priv *priv)
 219 {
 220         return rsnd_cmd_attach(io, rsnd_mod_id(mod));
 221 }
 222
 223 static int rsnd_dvc_remove_(struct rsnd_mod *mod,
 224                             struct rsnd_dai_stream *io,
 225                             struct rsnd_priv *priv)
 226 {
 227         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 228
 229         rsnd_kctrl_remove(dvc->volume);
 230         rsnd_kctrl_remove(dvc->mute);
 231         rsnd_kctrl_remove(dvc->ren);
 232         rsnd_kctrl_remove(dvc->rup);
 233         rsnd_kctrl_remove(dvc->rdown);
 234
 235         return 0;
 236 }
 237
 238 static int rsnd_dvc_init(struct rsnd_mod *mod,
 239                          struct rsnd_dai_stream *io,
 240                          struct rsnd_priv *priv)
 241 {
 242         rsnd_mod_power_on(mod);
 243
 244         rsnd_dvc_activation(mod);
 245
 246         rsnd_dvc_volume_init(io, mod);
 247
 248         rsnd_dvc_volume_update(io, mod);
 249
 250         return 0;
 251 }
 252
 253 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 254                          struct rsnd_dai_stream *io,
 255                          struct rsnd_priv *priv)
 256 {
 257         rsnd_dvc_halt(mod);
 258
 259         rsnd_mod_power_off(mod);
 260
 261         return 0;
 262 }
 263
 264 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 265                             struct rsnd_dai_stream *io,
 266                             struct snd_soc_pcm_runtime *rtd)
 267 {
 268         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 269         int is_play = rsnd_io_is_play(io);
 270         int slots = rsnd_get_slot(io);
 271         int ret;
 272
 273         /* Volume */
 274         ret = rsnd_kctrl_new_m(mod, io, rtd,
 275                         is_play ?
 276                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 277                         rsnd_dvc_volume_update,
 278                         &dvc->volume, slots,
 279                         0x00800000 - 1);
 280         if (ret < 0)
 281                 return ret;
 282
 283         /* Mute */
 284         ret = rsnd_kctrl_new_m(mod, io, rtd,
 285                         is_play ?
 286                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 287                         rsnd_dvc_volume_update,
 288                         &dvc->mute,  slots,
 289                         1);
 290         if (ret < 0)
 291                 return ret;
 292
 293         /* Ramp */
 294         ret = rsnd_kctrl_new_s(mod, io, rtd,
 295                         is_play ?
 296                         "DVC Out Ramp Switch" : "DVC In Ramp Switch",
 297                         rsnd_dvc_volume_update,
 298                         &dvc->ren, 1);
 299         if (ret < 0)
 300                 return ret;
 301
 302         ret = rsnd_kctrl_new_e(mod, io, rtd,
 303                         is_play ?
 304                         "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
 305                         &dvc->rup,
 306                         rsnd_dvc_volume_update,
 307                         dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
 308         if (ret < 0)
 309                 return ret;
 310
 311         ret = rsnd_kctrl_new_e(mod, io, rtd,
 312                         is_play ?
 313                         "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
 314                         &dvc->rdown,
 315                         rsnd_dvc_volume_update,
 316                         dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
 317
 318         if (ret < 0)
 319                 return ret;
 320
 321         return 0;
 322 }
 323
 324 static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
 325                                          struct rsnd_mod *mod)
 326 {
 327         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 328
 329         return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
 330                                         mod, "tx");
 331 }
 332
 333 static struct rsnd_mod_ops rsnd_dvc_ops = {
 334         .name           = DVC_NAME,
 335         .dma_req        = rsnd_dvc_dma_req,
 336         .probe          = rsnd_dvc_probe_,
 337         .remove         = rsnd_dvc_remove_,
 338         .init           = rsnd_dvc_init,
 339         .quit           = rsnd_dvc_quit,
 340         .pcm_new        = rsnd_dvc_pcm_new,
 341 };
 342
 343 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 344 {
 345         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 346                 id = 0;
 347
 348         return rsnd_mod_get(rsnd_dvc_get(priv, id));
 349 }
 350
 351 int rsnd_dvc_probe(struct rsnd_priv *priv)
 352 {
 353         struct device_node *node;
 354         struct device_node *np;
 355         struct device *dev = rsnd_priv_to_dev(priv);
 356         struct rsnd_dvc *dvc;
 357         struct clk *clk;
 358         char name[RSND_DVC_NAME_SIZE];
 359         int i, nr, ret;
 360
 361         /* This driver doesn't support Gen1 at this point */
 362         if (rsnd_is_gen1(priv))
 363                 return 0;
 364
 365         node = rsnd_dvc_of_node(priv);
 366         if (!node)
 367                 return 0; /* not used is not error */
 368
 369         nr = of_get_child_count(node);
 370         if (!nr) {
 371                 ret = -EINVAL;
 372                 goto rsnd_dvc_probe_done;
 373         }
 374
 375         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 376         if (!dvc) {
 377                 ret = -ENOMEM;
 378                 goto rsnd_dvc_probe_done;
 379         }
 380
 381         priv->dvc_nr    = nr;
 382         priv->dvc       = dvc;
 383
 384         i = 0;
 385         ret = 0;
 386         for_each_child_of_node(node, np) {
 387                 dvc = rsnd_dvc_get(priv, i);
 388
 389                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 390                          DVC_NAME, i);
 391
 392                 clk = devm_clk_get(dev, name);
 393                 if (IS_ERR(clk)) {
 394                         ret = PTR_ERR(clk);
 395                         goto rsnd_dvc_probe_done;
 396                 }
 397
 398                 ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
 399                                     clk, rsnd_mod_get_status, RSND_MOD_DVC, i);
 400                 if (ret)
 401                         goto rsnd_dvc_probe_done;
 402
 403                 i++;
 404         }
 405
 406 rsnd_dvc_probe_done:
 407         of_node_put(node);
 408
 409         return ret;
 410 }
 411
 412 void rsnd_dvc_remove(struct rsnd_priv *priv)
 413 {
 414         struct rsnd_dvc *dvc;
 415         int i;
 416
 417         for_each_rsnd_dvc(dvc, priv, i) {
 418                 rsnd_mod_quit(rsnd_mod_get(dvc));
 419         }
 420 }