sound/soc/sh/rcar/dvc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Renesas R-Car DVC support
   4 //
   5 // Copyright (C) 2014 Renesas Solutions Corp.
   6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7
   8 /*
   9  * Playback Volume
  10  *      amixer set "DVC Out" 100%
  11  *
  12  * Capture Volume
  13  *      amixer set "DVC In" 100%
  14  *
  15  * Playback Mute
  16  *      amixer set "DVC Out Mute" on
  17  *
  18  * Capture Mute
  19  *      amixer set "DVC In Mute" on
  20  *
  21  * Volume Ramp
  22  *      amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
  23  *      amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
  24  *      amixer set "DVC Out Ramp" on
  25  *      aplay xxx.wav &
  26  *      amixer set "DVC Out"  80%  // Volume Down
  27  *      amixer set "DVC Out" 100%  // Volume Up
  28  */
  29
  30 #include "rsnd.h"
  31
  32 #define RSND_DVC_NAME_SIZE      16
  33
  34 #define DVC_NAME "dvc"
  35
  36 struct rsnd_dvc {
  37         struct rsnd_mod mod;
  38         struct rsnd_kctrl_cfg_m volume;
  39         struct rsnd_kctrl_cfg_m mute;
  40         struct rsnd_kctrl_cfg_s ren;    /* Ramp Enable */
  41         struct rsnd_kctrl_cfg_s rup;    /* Ramp Rate Up */
  42         struct rsnd_kctrl_cfg_s rdown;  /* Ramp Rate Down */
  43 };
  44
  45 #define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id)
  46 #define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
  47
  48 #define rsnd_mod_to_dvc(_mod)   \
  49         container_of((_mod), struct rsnd_dvc, mod)
  50
  51 #define for_each_rsnd_dvc(pos, priv, i)                         \
  52         for ((i) = 0;                                           \
  53              ((i) < rsnd_dvc_nr(priv)) &&                       \
  54              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  55              i++)
  56
  57 static void rsnd_dvc_activation(struct rsnd_mod *mod)
  58 {
  59         rsnd_mod_write(mod, DVC_SWRSR, 0);
  60         rsnd_mod_write(mod, DVC_SWRSR, 1);
  61 }
  62
  63 static void rsnd_dvc_halt(struct rsnd_mod *mod)
  64 {
  65         rsnd_mod_write(mod, DVC_DVUIR, 1);
  66         rsnd_mod_write(mod, DVC_SWRSR, 0);
  67 }
  68
  69 #define rsnd_dvc_get_vrpdr(dvc) (rsnd_kctrl_vals(dvc->rup) << 8 | \
  70                                  rsnd_kctrl_vals(dvc->rdown))
  71 #define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (rsnd_kctrl_valm(dvc->volume, 0) >> 13))
  72
  73 static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io,
  74                                               struct rsnd_mod *mod)
  75 {
  76         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  77         u32 val[RSND_MAX_CHANNELS];
  78         int i;
  79
  80         /* Enable Ramp */
  81         if (rsnd_kctrl_vals(dvc->ren))
  82                 for (i = 0; i < RSND_MAX_CHANNELS; i++)
  83                         val[i] = rsnd_kctrl_max(dvc->volume);
  84         else
  85                 for (i = 0; i < RSND_MAX_CHANNELS; i++)
  86                         val[i] = rsnd_kctrl_valm(dvc->volume, i);
  87
  88         /* Enable Digital Volume */
  89         rsnd_mod_write(mod, DVC_VOL0R, val[0]);
  90         rsnd_mod_write(mod, DVC_VOL1R, val[1]);
  91         rsnd_mod_write(mod, DVC_VOL2R, val[2]);
  92         rsnd_mod_write(mod, DVC_VOL3R, val[3]);
  93         rsnd_mod_write(mod, DVC_VOL4R, val[4]);
  94         rsnd_mod_write(mod, DVC_VOL5R, val[5]);
  95         rsnd_mod_write(mod, DVC_VOL6R, val[6]);
  96         rsnd_mod_write(mod, DVC_VOL7R, val[7]);
  97 }
  98
  99 static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
 100                                  struct rsnd_mod *mod)
 101 {
 102         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 103         u32 adinr = 0;
 104         u32 dvucr = 0;
 105         u32 vrctr = 0;
 106         u32 vrpdr = 0;
 107         u32 vrdbr = 0;
 108
 109         adinr = rsnd_get_adinr_bit(mod, io) |
 110                 rsnd_runtime_channel_after_ctu(io);
 111
 112         /* Enable Digital Volume, Zero Cross Mute Mode */
 113         dvucr |= 0x101;
 114
 115         /* Enable Ramp */
 116         if (rsnd_kctrl_vals(dvc->ren)) {
 117                 dvucr |= 0x10;
 118
 119                 /*
 120                  * FIXME !!
 121                  * use scale-downed Digital Volume
 122                  * as Volume Ramp
 123                  * 7F FFFF -> 3FF
 124                  */
 125                 vrctr = 0xff;
 126                 vrpdr = rsnd_dvc_get_vrpdr(dvc);
 127                 vrdbr = rsnd_dvc_get_vrdbr(dvc);
 128         }
 129
 130         /* Initialize operation */
 131         rsnd_mod_write(mod, DVC_DVUIR, 1);
 132
 133         /* General Information */
 134         rsnd_mod_write(mod, DVC_ADINR, adinr);
 135         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
 136
 137         /* Volume Ramp Parameter */
 138         rsnd_mod_write(mod, DVC_VRCTR, vrctr);
 139         rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
 140         rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
 141
 142         /* Digital Volume Function Parameter */
 143         rsnd_dvc_volume_parameter(io, mod);
 144
 145         /* cancel operation */
 146         rsnd_mod_write(mod, DVC_DVUIR, 0);
 147 }
 148
 149 static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io,
 150                                    struct rsnd_mod *mod)
 151 {
 152         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 153         u32 zcmcr = 0;
 154         u32 vrpdr = 0;
 155         u32 vrdbr = 0;
 156         int i;
 157
 158         for (i = 0; i < rsnd_kctrl_size(dvc->mute); i++)
 159                 zcmcr |= (!!rsnd_kctrl_valm(dvc->mute, i)) << i;
 160
 161         if (rsnd_kctrl_vals(dvc->ren)) {
 162                 vrpdr = rsnd_dvc_get_vrpdr(dvc);
 163                 vrdbr = rsnd_dvc_get_vrdbr(dvc);
 164         }
 165
 166         /* Disable DVC Register access */
 167         rsnd_mod_write(mod, DVC_DVUER, 0);
 168
 169         /* Zero Cross Mute Function */
 170         rsnd_mod_write(mod, DVC_ZCMCR, zcmcr);
 171
 172         /* Volume Ramp Function */
 173         rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
 174         rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
 175         /* add DVC_VRWTR here */
 176
 177         /* Digital Volume Function Parameter */
 178         rsnd_dvc_volume_parameter(io, mod);
 179
 180         /* Enable DVC Register access */
 181         rsnd_mod_write(mod, DVC_DVUER, 1);
 182 }
 183
 184 static int rsnd_dvc_probe_(struct rsnd_mod *mod,
 185                            struct rsnd_dai_stream *io,
 186                            struct rsnd_priv *priv)
 187 {
 188         return rsnd_cmd_attach(io, rsnd_mod_id(mod));
 189 }
 190
 191 static int rsnd_dvc_init(struct rsnd_mod *mod,
 192                          struct rsnd_dai_stream *io,
 193                          struct rsnd_priv *priv)
 194 {
 195         rsnd_mod_power_on(mod);
 196
 197         rsnd_dvc_activation(mod);
 198
 199         rsnd_dvc_volume_init(io, mod);
 200
 201         rsnd_dvc_volume_update(io, mod);
 202
 203         return 0;
 204 }
 205
 206 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 207                          struct rsnd_dai_stream *io,
 208                          struct rsnd_priv *priv)
 209 {
 210         rsnd_dvc_halt(mod);
 211
 212         rsnd_mod_power_off(mod);
 213
 214         return 0;
 215 }
 216
 217 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 218                             struct rsnd_dai_stream *io,
 219                             struct snd_soc_pcm_runtime *rtd)
 220 {
 221         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 222         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 223         int is_play = rsnd_io_is_play(io);
 224         int channels = rsnd_rdai_channels_get(rdai);
 225         int ret;
 226
 227         /* Volume */
 228         ret = rsnd_kctrl_new_m(mod, io, rtd,
 229                         is_play ?
 230                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 231                         rsnd_kctrl_accept_anytime,
 232                         rsnd_dvc_volume_update,
 233                         &dvc->volume, channels,
 234                         0x00800000 - 1);
 235         if (ret < 0)
 236                 return ret;
 237
 238         /* Mute */
 239         ret = rsnd_kctrl_new_m(mod, io, rtd,
 240                         is_play ?
 241                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 242                         rsnd_kctrl_accept_anytime,
 243                         rsnd_dvc_volume_update,
 244                         &dvc->mute, channels,
 245                         1);
 246         if (ret < 0)
 247                 return ret;
 248
 249         /* Ramp */
 250         ret = rsnd_kctrl_new_s(mod, io, rtd,
 251                         is_play ?
 252                         "DVC Out Ramp Switch" : "DVC In Ramp Switch",
 253                         rsnd_kctrl_accept_anytime,
 254                         rsnd_dvc_volume_update,
 255                         &dvc->ren, 1);
 256         if (ret < 0)
 257                 return ret;
 258
 259         ret = rsnd_kctrl_new_e(mod, io, rtd,
 260                         is_play ?
 261                         "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
 262                         rsnd_kctrl_accept_anytime,
 263                         rsnd_dvc_volume_update,
 264                         &dvc->rup,
 265                         volume_ramp_rate,
 266                         VOLUME_RAMP_MAX_DVC);
 267         if (ret < 0)
 268                 return ret;
 269
 270         ret = rsnd_kctrl_new_e(mod, io, rtd,
 271                         is_play ?
 272                         "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
 273                         rsnd_kctrl_accept_anytime,
 274                         rsnd_dvc_volume_update,
 275                         &dvc->rdown,
 276                         volume_ramp_rate,
 277                         VOLUME_RAMP_MAX_DVC);
 278
 279         if (ret < 0)
 280                 return ret;
 281
 282         return 0;
 283 }
 284
 285 static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
 286                                          struct rsnd_mod *mod)
 287 {
 288         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 289
 290         return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
 291                                         mod, "tx");
 292 }
 293
 294 static struct rsnd_mod_ops rsnd_dvc_ops = {
 295         .name           = DVC_NAME,
 296         .dma_req        = rsnd_dvc_dma_req,
 297         .probe          = rsnd_dvc_probe_,
 298         .init           = rsnd_dvc_init,
 299         .quit           = rsnd_dvc_quit,
 300         .pcm_new        = rsnd_dvc_pcm_new,
 301 };
 302
 303 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 304 {
 305         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 306                 id = 0;
 307
 308         return rsnd_mod_get(rsnd_dvc_get(priv, id));
 309 }
 310
 311 int rsnd_dvc_probe(struct rsnd_priv *priv)
 312 {
 313         struct device_node *node;
 314         struct device_node *np;
 315         struct device *dev = rsnd_priv_to_dev(priv);
 316         struct rsnd_dvc *dvc;
 317         struct clk *clk;
 318         char name[RSND_DVC_NAME_SIZE];
 319         int i, nr, ret;
 320
 321         /* This driver doesn't support Gen1 at this point */
 322         if (rsnd_is_gen1(priv))
 323                 return 0;
 324
 325         node = rsnd_dvc_of_node(priv);
 326         if (!node)
 327                 return 0; /* not used is not error */
 328
 329         nr = of_get_child_count(node);
 330         if (!nr) {
 331                 ret = -EINVAL;
 332                 goto rsnd_dvc_probe_done;
 333         }
 334
 335         dvc     = devm_kcalloc(dev, nr, sizeof(*dvc), GFP_KERNEL);
 336         if (!dvc) {
 337                 ret = -ENOMEM;
 338                 goto rsnd_dvc_probe_done;
 339         }
 340
 341         priv->dvc_nr    = nr;
 342         priv->dvc       = dvc;
 343
 344         i = 0;
 345         ret = 0;
 346         for_each_child_of_node(node, np) {
 347                 dvc = rsnd_dvc_get(priv, i);
 348
 349                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 350                          DVC_NAME, i);
 351
 352                 clk = devm_clk_get(dev, name);
 353                 if (IS_ERR(clk)) {
 354                         ret = PTR_ERR(clk);
 355                         of_node_put(np);
 356                         goto rsnd_dvc_probe_done;
 357                 }
 358
 359                 ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
 360                                     clk, rsnd_mod_get_status, RSND_MOD_DVC, i);
 361                 if (ret) {
 362                         of_node_put(np);
 363                         goto rsnd_dvc_probe_done;
 364                 }
 365
 366                 i++;
 367         }
 368
 369 rsnd_dvc_probe_done:
 370         of_node_put(node);
 371
 372         return ret;
 373 }
 374
 375 void rsnd_dvc_remove(struct rsnd_priv *priv)
 376 {
 377         struct rsnd_dvc *dvc;
 378         int i;
 379
 380         for_each_rsnd_dvc(dvc, priv, i) {
 381                 rsnd_mod_quit(rsnd_mod_get(dvc));
 382         }
 383 }