kernel/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_dvc_of_node(priv) \
  28         of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,dvc")
  29
  30 #define rsnd_mod_to_dvc(_mod)   \
  31         container_of((_mod), struct rsnd_dvc, mod)
  32
  33 #define for_each_rsnd_dvc(pos, priv, i)                         \
  34         for ((i) = 0;                                           \
  35              ((i) < rsnd_dvc_nr(priv)) &&                       \
  36              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  37              i++)
  38
  39 static const char * const dvc_ramp_rate[] = {
  40         "128 dB/1 step",         /* 00000 */
  41         "64 dB/1 step",          /* 00001 */
  42         "32 dB/1 step",          /* 00010 */
  43         "16 dB/1 step",          /* 00011 */
  44         "8 dB/1 step",           /* 00100 */
  45         "4 dB/1 step",           /* 00101 */
  46         "2 dB/1 step",           /* 00110 */
  47         "1 dB/1 step",           /* 00111 */
  48         "0.5 dB/1 step",         /* 01000 */
  49         "0.25 dB/1 step",        /* 01001 */
  50         "0.125 dB/1 step",       /* 01010 */
  51         "0.125 dB/2 steps",      /* 01011 */
  52         "0.125 dB/4 steps",      /* 01100 */
  53         "0.125 dB/8 steps",      /* 01101 */
  54         "0.125 dB/16 steps",     /* 01110 */
  55         "0.125 dB/32 steps",     /* 01111 */
  56         "0.125 dB/64 steps",     /* 10000 */
  57         "0.125 dB/128 steps",    /* 10001 */
  58         "0.125 dB/256 steps",    /* 10010 */
  59         "0.125 dB/512 steps",    /* 10011 */
  60         "0.125 dB/1024 steps",   /* 10100 */
  61         "0.125 dB/2048 steps",   /* 10101 */
  62         "0.125 dB/4096 steps",   /* 10110 */
  63         "0.125 dB/8192 steps",   /* 10111 */
  64 };
  65
  66 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  67 {
  68         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  69         u32 val[RSND_DVC_CHANNELS];
  70         u32 dvucr = 0;
  71         u32 mute = 0;
  72         int i;
  73
  74         for (i = 0; i < dvc->mute.cfg.size; i++)
  75                 mute |= (!!dvc->mute.cfg.val[i]) << i;
  76
  77         /* Disable DVC Register access */
  78         rsnd_mod_write(mod, DVC_DVUER, 0);
  79
  80         /* Enable Ramp */
  81         if (dvc->ren.val) {
  82                 dvucr |= 0x10;
  83
  84                 /* Digital Volume Max */
  85                 for (i = 0; i < RSND_DVC_CHANNELS; i++)
  86                         val[i] = dvc->volume.cfg.max;
  87
  88                 rsnd_mod_write(mod, DVC_VRCTR, 0xff);
  89                 rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 |
  90                                                dvc->rdown.val);
  91                 /*
  92                  * FIXME !!
  93                  * use scale-downed Digital Volume
  94                  * as Volume Ramp
  95                  * 7F FFFF -> 3FF
  96                  */
  97                 rsnd_mod_write(mod, DVC_VRDBR,
  98                                0x3ff - (dvc->volume.val[0] >> 13));
  99
 100         } else {
 101                 for (i = 0; i < RSND_DVC_CHANNELS; i++)
 102                         val[i] = dvc->volume.val[i];
 103         }
 104
 105         /* Enable Digital Volume */
 106         dvucr |= 0x100;
 107         rsnd_mod_write(mod, DVC_VOL0R, val[0]);
 108         rsnd_mod_write(mod, DVC_VOL1R, val[1]);
 109
 110         /*  Enable Mute */
 111         if (mute) {
 112                 dvucr |= 0x1;
 113                 rsnd_mod_write(mod, DVC_ZCMCR, mute);
 114         }
 115
 116         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
 117
 118         /* Enable DVC Register access */
 119         rsnd_mod_write(mod, DVC_DVUER, 1);
 120 }
 121
 122 static int rsnd_dvc_remove_gen2(struct rsnd_mod *mod,
 123                                 struct rsnd_priv *priv)
 124 {
 125         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 126
 127         rsnd_kctrl_remove(dvc->volume);
 128         rsnd_kctrl_remove(dvc->mute);
 129         rsnd_kctrl_remove(dvc->ren);
 130         rsnd_kctrl_remove(dvc->rup);
 131         rsnd_kctrl_remove(dvc->rdown);
 132
 133         return 0;
 134 }
 135
 136 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
 137                          struct rsnd_priv *priv)
 138 {
 139         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
 140         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 141         struct device *dev = rsnd_priv_to_dev(priv);
 142         int dvc_id = rsnd_mod_id(dvc_mod);
 143         int src_id = rsnd_mod_id(src_mod);
 144         u32 route[] = {
 145                 [0] = 0x30000,
 146                 [1] = 0x30001,
 147                 [2] = 0x40000,
 148                 [3] = 0x10000,
 149                 [4] = 0x20000,
 150                 [5] = 0x40100
 151         };
 152
 153         if (src_id >= ARRAY_SIZE(route)) {
 154                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
 155                 return -EINVAL;
 156         }
 157
 158         rsnd_mod_hw_start(dvc_mod);
 159
 160         /*
 161          * fixme
 162          * it doesn't support CTU/MIX
 163          */
 164         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
 165
 166         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
 167         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
 168
 169         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
 170
 171         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
 172
 173         /* ch0/ch1 Volume */
 174         rsnd_dvc_volume_update(dvc_mod);
 175
 176         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 177
 178         rsnd_adg_set_cmd_timsel_gen2(dvc_mod, io);
 179
 180         return 0;
 181 }
 182
 183 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 184                          struct rsnd_priv *priv)
 185 {
 186         rsnd_mod_hw_stop(mod);
 187
 188         return 0;
 189 }
 190
 191 static int rsnd_dvc_start(struct rsnd_mod *mod,
 192                           struct rsnd_priv *priv)
 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_priv *priv)
 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 snd_soc_pcm_runtime *rtd)
 209 {
 210         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 211         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 212         int is_play = rsnd_io_is_play(io);
 213         int ret;
 214
 215         /* Volume */
 216         ret = rsnd_kctrl_new_m(mod, rtd,
 217                         is_play ?
 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, rtd,
 226                         is_play ?
 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, rtd,
 235                         is_play ?
 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, rtd,
 243                         is_play ?
 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, rtd,
 252                         is_play ?
 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 dma_chan *rsnd_dvc_dma_req(struct rsnd_mod *mod)
 265 {
 266         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 267
 268         return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
 269                                         mod, "tx");
 270 }
 271
 272 static struct rsnd_mod_ops rsnd_dvc_ops = {
 273         .name           = DVC_NAME,
 274         .dma_req        = rsnd_dvc_dma_req,
 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
 375         return 0;
 376 }
 377
 378 void rsnd_dvc_remove(struct platform_device *pdev,
 379                      struct rsnd_priv *priv)
 380 {
 381         struct rsnd_dvc *dvc;
 382         int i;
 383
 384         for_each_rsnd_dvc(dvc, priv, i) {
 385                 rsnd_mod_quit(&dvc->mod);
 386         }
 387 }