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