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 #include "rsnd.h"
  12
  13 #define RSND_DVC_NAME_SIZE      16
  14
  15 #define DVC_NAME "dvc"
  16
  17 struct rsnd_dvc {
  18         struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
  19         struct rsnd_mod mod;
  20         struct rsnd_kctrl_cfg_m volume;
  21         struct rsnd_kctrl_cfg_m mute;
  22         struct rsnd_kctrl_cfg_s ren;    /* Ramp Enable */
  23         struct rsnd_kctrl_cfg_s rup;    /* Ramp Rate Up */
  24         struct rsnd_kctrl_cfg_s rdown;  /* Ramp Rate Down */
  25 };
  26
  27 #define rsnd_mod_to_dvc(_mod)   \
  28         container_of((_mod), struct rsnd_dvc, mod)
  29
  30 #define for_each_rsnd_dvc(pos, priv, i)                         \
  31         for ((i) = 0;                                           \
  32              ((i) < rsnd_dvc_nr(priv)) &&                       \
  33              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  34              i++)
  35
  36 static const char const *dvc_ramp_rate[] = {
  37         "128 dB/1 step",         /* 00000 */
  38         "64 dB/1 step",          /* 00001 */
  39         "32 dB/1 step",          /* 00010 */
  40         "16 dB/1 step",          /* 00011 */
  41         "8 dB/1 step",           /* 00100 */
  42         "4 dB/1 step",           /* 00101 */
  43         "2 dB/1 step",           /* 00110 */
  44         "1 dB/1 step",           /* 00111 */
  45         "0.5 dB/1 step",         /* 01000 */
  46         "0.25 dB/1 step",        /* 01001 */
  47         "0.125 dB/1 step",       /* 01010 */
  48         "0.125 dB/2 steps",      /* 01011 */
  49         "0.125 dB/4 steps",      /* 01100 */
  50         "0.125 dB/8 steps",      /* 01101 */
  51         "0.125 dB/16 steps",     /* 01110 */
  52         "0.125 dB/32 steps",     /* 01111 */
  53         "0.125 dB/64 steps",     /* 10000 */
  54         "0.125 dB/128 steps",    /* 10001 */
  55         "0.125 dB/256 steps",    /* 10010 */
  56         "0.125 dB/512 steps",    /* 10011 */
  57         "0.125 dB/1024 steps",   /* 10100 */
  58         "0.125 dB/2048 steps",   /* 10101 */
  59         "0.125 dB/4096 steps",   /* 10110 */
  60         "0.125 dB/8192 steps",   /* 10111 */
  61 };
  62
  63 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  64 {
  65         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  66         u32 val[RSND_DVC_CHANNELS];
  67         u32 dvucr = 0;
  68         u32 mute = 0;
  69         int i;
  70
  71         for (i = 0; i < dvc->mute.cfg.size; i++)
  72                 mute |= (!!dvc->mute.cfg.val[i]) << i;
  73
  74         /* Disable DVC Register access */
  75         rsnd_mod_write(mod, DVC_DVUER, 0);
  76
  77         /* Enable Ramp */
  78         if (dvc->ren.val) {
  79                 dvucr |= 0x10;
  80
  81                 /* Digital Volume Max */
  82                 for (i = 0; i < RSND_DVC_CHANNELS; i++)
  83                         val[i] = dvc->volume.cfg.max;
  84
  85                 rsnd_mod_write(mod, DVC_VRCTR, 0xff);
  86                 rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 |
  87                                                dvc->rdown.val);
  88                 /*
  89                  * FIXME !!
  90                  * use scale-downed Digital Volume
  91                  * as Volume Ramp
  92                  * 7F FFFF -> 3FF
  93                  */
  94                 rsnd_mod_write(mod, DVC_VRDBR,
  95                                0x3ff - (dvc->volume.val[0] >> 13));
  96
  97         } else {
  98                 for (i = 0; i < RSND_DVC_CHANNELS; i++)
  99                         val[i] = dvc->volume.val[i];
 100         }
 101
 102         /* Enable Digital Volume */
 103         dvucr |= 0x100;
 104         rsnd_mod_write(mod, DVC_VOL0R, val[0]);
 105         rsnd_mod_write(mod, DVC_VOL1R, val[1]);
 106
 107         /*  Enable Mute */
 108         if (mute) {
 109                 dvucr |= 0x1;
 110                 rsnd_mod_write(mod, DVC_ZCMCR, mute);
 111         }
 112
 113         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
 114
 115         /* Enable DVC Register access */
 116         rsnd_mod_write(mod, DVC_DVUER, 1);
 117 }
 118
 119 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
 120                                struct rsnd_priv *priv)
 121 {
 122         struct device *dev = rsnd_priv_to_dev(priv);
 123
 124         dev_dbg(dev, "%s[%d] (Gen2) is probed\n",
 125                 rsnd_mod_name(mod), rsnd_mod_id(mod));
 126
 127         return 0;
 128 }
 129
 130 static int rsnd_dvc_remove_gen2(struct rsnd_mod *mod,
 131                                 struct rsnd_priv *priv)
 132 {
 133         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 134
 135         rsnd_kctrl_remove(dvc->volume);
 136         rsnd_kctrl_remove(dvc->mute);
 137         rsnd_kctrl_remove(dvc->ren);
 138         rsnd_kctrl_remove(dvc->rup);
 139         rsnd_kctrl_remove(dvc->rdown);
 140
 141         return 0;
 142 }
 143
 144 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
 145                          struct rsnd_priv *priv)
 146 {
 147         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
 148         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 149         struct device *dev = rsnd_priv_to_dev(priv);
 150         int dvc_id = rsnd_mod_id(dvc_mod);
 151         int src_id = rsnd_mod_id(src_mod);
 152         u32 route[] = {
 153                 [0] = 0x30000,
 154                 [1] = 0x30001,
 155                 [2] = 0x40000,
 156                 [3] = 0x10000,
 157                 [4] = 0x20000,
 158                 [5] = 0x40100
 159         };
 160
 161         if (src_id >= ARRAY_SIZE(route)) {
 162                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
 163                 return -EINVAL;
 164         }
 165
 166         rsnd_mod_hw_start(dvc_mod);
 167
 168         /*
 169          * fixme
 170          * it doesn't support CTU/MIX
 171          */
 172         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
 173
 174         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
 175         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
 176
 177         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
 178
 179         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
 180
 181         /* ch0/ch1 Volume */
 182         rsnd_dvc_volume_update(dvc_mod);
 183
 184         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 185
 186         rsnd_adg_set_cmd_timsel_gen2(dvc_mod, io);
 187
 188         return 0;
 189 }
 190
 191 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 192                          struct rsnd_priv *priv)
 193 {
 194         rsnd_mod_hw_stop(mod);
 195
 196         return 0;
 197 }
 198
 199 static int rsnd_dvc_start(struct rsnd_mod *mod,
 200                           struct rsnd_priv *priv)
 201 {
 202         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 203
 204         return 0;
 205 }
 206
 207 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 208                          struct rsnd_priv *priv)
 209 {
 210         rsnd_mod_write(mod, CMD_CTRL, 0);
 211
 212         return 0;
 213 }
 214
 215 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 216                             struct snd_soc_pcm_runtime *rtd)
 217 {
 218         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 219         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 220         int is_play = rsnd_io_is_play(io);
 221         int ret;
 222
 223         /* Volume */
 224         ret = rsnd_kctrl_new_m(mod, rtd,
 225                         is_play ?
 226                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 227                         rsnd_dvc_volume_update,
 228                         &dvc->volume, 0x00800000 - 1);
 229         if (ret < 0)
 230                 return ret;
 231
 232         /* Mute */
 233         ret = rsnd_kctrl_new_m(mod, rtd,
 234                         is_play ?
 235                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 236                         rsnd_dvc_volume_update,
 237                         &dvc->mute, 1);
 238         if (ret < 0)
 239                 return ret;
 240
 241         /* Ramp */
 242         ret = rsnd_kctrl_new_s(mod, rtd,
 243                         is_play ?
 244                         "DVC Out Ramp Switch" : "DVC In Ramp Switch",
 245                         rsnd_dvc_volume_update,
 246                         &dvc->ren, 1);
 247         if (ret < 0)
 248                 return ret;
 249
 250         ret = rsnd_kctrl_new_e(mod, rtd,
 251                         is_play ?
 252                         "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
 253                         &dvc->rup,
 254                         rsnd_dvc_volume_update,
 255                         dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
 256         if (ret < 0)
 257                 return ret;
 258
 259         ret = rsnd_kctrl_new_e(mod, rtd,
 260                         is_play ?
 261                         "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
 262                         &dvc->rdown,
 263                         rsnd_dvc_volume_update,
 264                         dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
 265
 266         if (ret < 0)
 267                 return ret;
 268
 269         return 0;
 270 }
 271
 272 static struct rsnd_mod_ops rsnd_dvc_ops = {
 273         .name           = DVC_NAME,
 274         .probe          = rsnd_dvc_probe_gen2,
 275         .remove         = rsnd_dvc_remove_gen2,
 276         .init           = rsnd_dvc_init,
 277         .quit           = rsnd_dvc_quit,
 278         .start          = rsnd_dvc_start,
 279         .stop           = rsnd_dvc_stop,
 280         .pcm_new        = rsnd_dvc_pcm_new,
 281 };
 282
 283 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 284 {
 285         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 286                 id = 0;
 287
 288         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 289 }
 290
 291 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 292                               const struct rsnd_of_data *of_data,
 293                               struct rsnd_priv *priv)
 294 {
 295         struct device_node *node;
 296         struct rsnd_dvc_platform_info *dvc_info;
 297         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 298         struct device *dev = &pdev->dev;
 299         int nr;
 300
 301         if (!of_data)
 302                 return;
 303
 304         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 305         if (!node)
 306                 return;
 307
 308         nr = of_get_child_count(node);
 309         if (!nr)
 310                 goto rsnd_of_parse_dvc_end;
 311
 312         dvc_info = devm_kzalloc(dev,
 313                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 314                                 GFP_KERNEL);
 315         if (!dvc_info) {
 316                 dev_err(dev, "dvc info allocation error\n");
 317                 goto rsnd_of_parse_dvc_end;
 318         }
 319
 320         info->dvc_info          = dvc_info;
 321         info->dvc_info_nr       = nr;
 322
 323 rsnd_of_parse_dvc_end:
 324         of_node_put(node);
 325 }
 326
 327 int rsnd_dvc_probe(struct platform_device *pdev,
 328                    const struct rsnd_of_data *of_data,
 329                    struct rsnd_priv *priv)
 330 {
 331         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 332         struct device *dev = rsnd_priv_to_dev(priv);
 333         struct rsnd_dvc *dvc;
 334         struct clk *clk;
 335         char name[RSND_DVC_NAME_SIZE];
 336         int i, nr, ret;
 337
 338         rsnd_of_parse_dvc(pdev, of_data, priv);
 339
 340         nr = info->dvc_info_nr;
 341         if (!nr)
 342                 return 0;
 343
 344         /* This driver doesn't support Gen1 at this point */
 345         if (rsnd_is_gen1(priv)) {
 346                 dev_warn(dev, "CMD is not supported on Gen1\n");
 347                 return -EINVAL;
 348         }
 349
 350         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 351         if (!dvc) {
 352                 dev_err(dev, "CMD allocate failed\n");
 353                 return -ENOMEM;
 354         }
 355
 356         priv->dvc_nr    = nr;
 357         priv->dvc       = dvc;
 358
 359         for_each_rsnd_dvc(dvc, priv, i) {
 360                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 361                          DVC_NAME, i);
 362
 363                 clk = devm_clk_get(dev, name);
 364                 if (IS_ERR(clk))
 365                         return PTR_ERR(clk);
 366
 367                 dvc->info = &info->dvc_info[i];
 368
 369                 ret = rsnd_mod_init(&dvc->mod, &rsnd_dvc_ops,
 370                               clk, RSND_MOD_DVC, i);
 371                 if (ret)
 372                         return ret;
 373
 374                 dev_dbg(dev, "CMD%d probed\n", i);
 375         }
 376
 377         return 0;
 378 }
 379
 380 void rsnd_dvc_remove(struct platform_device *pdev,
 381                      struct rsnd_priv *priv)
 382 {
 383         struct rsnd_dvc *dvc;
 384         int i;
 385
 386         for_each_rsnd_dvc(dvc, priv, i) {
 387                 rsnd_mod_quit(&dvc->mod);
 388         }
 389 }