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 #define RSND_DVC_CHANNELS       2
  15
  16 #define DVC_NAME "dvc"
  17
  18 struct rsnd_dvc_cfg {
  19         unsigned int max;
  20         unsigned int size;
  21         u32 *val;
  22 };
  23
  24 struct rsnd_dvc_cfg_m {
  25         struct rsnd_dvc_cfg cfg;
  26         u32 val[RSND_DVC_CHANNELS];
  27 };
  28
  29 struct rsnd_dvc {
  30         struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
  31         struct rsnd_mod mod;
  32         struct clk *clk;
  33         struct rsnd_dvc_cfg_m volume;
  34         struct rsnd_dvc_cfg_m mute;
  35 };
  36
  37 #define rsnd_mod_to_dvc(_mod)   \
  38         container_of((_mod), struct rsnd_dvc, mod)
  39
  40 #define for_each_rsnd_dvc(pos, priv, i)                         \
  41         for ((i) = 0;                                           \
  42              ((i) < rsnd_dvc_nr(priv)) &&                       \
  43              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  44              i++)
  45
  46 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  47 {
  48         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  49         u32 dvucr = 0;
  50         u32 mute = 0;
  51         int i;
  52
  53         for (i = 0; i < dvc->mute.cfg.size; i++)
  54                 mute |= (!!dvc->mute.cfg.val[i]) << i;
  55
  56         /* Disable DVC Register access */
  57         rsnd_mod_write(mod, DVC_DVUER, 0);
  58
  59         /* Enable Digital Volume */
  60         dvucr = 0x100;
  61         rsnd_mod_write(mod, DVC_VOL0R, dvc->volume.val[0]);
  62         rsnd_mod_write(mod, DVC_VOL1R, dvc->volume.val[1]);
  63
  64         /*  Enable Mute */
  65         if (mute) {
  66                 dvucr |= 0x1;
  67                 rsnd_mod_write(mod, DVC_ZCMCR, mute);
  68         }
  69
  70         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
  71
  72         /* Enable DVC Register access */
  73         rsnd_mod_write(mod, DVC_DVUER, 1);
  74 }
  75
  76 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
  77                                struct rsnd_dai *rdai)
  78 {
  79         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
  80         struct device *dev = rsnd_priv_to_dev(priv);
  81
  82         dev_dbg(dev, "%s (Gen2) is probed\n", rsnd_mod_name(mod));
  83
  84         return 0;
  85 }
  86
  87 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
  88                          struct rsnd_dai *rdai)
  89 {
  90         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
  91         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
  92         struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
  93         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
  94         struct device *dev = rsnd_priv_to_dev(priv);
  95         int dvc_id = rsnd_mod_id(dvc_mod);
  96         int src_id = rsnd_mod_id(src_mod);
  97         u32 route[] = {
  98                 [0] = 0x30000,
  99                 [1] = 0x30001,
 100                 [2] = 0x40000,
 101                 [3] = 0x10000,
 102                 [4] = 0x20000,
 103                 [5] = 0x40100
 104         };
 105
 106         if (src_id >= ARRAY_SIZE(route)) {
 107                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
 108                 return -EINVAL;
 109         }
 110
 111         clk_prepare_enable(dvc->clk);
 112
 113         /*
 114          * fixme
 115          * it doesn't support CTU/MIX
 116          */
 117         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
 118
 119         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
 120         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
 121
 122         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
 123
 124         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
 125
 126         /* ch0/ch1 Volume */
 127         rsnd_dvc_volume_update(dvc_mod);
 128
 129         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 130
 131         rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
 132
 133         return 0;
 134 }
 135
 136 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 137                          struct rsnd_dai *rdai)
 138 {
 139         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 140
 141         clk_disable_unprepare(dvc->clk);
 142
 143         return 0;
 144 }
 145
 146 static int rsnd_dvc_start(struct rsnd_mod *mod,
 147                           struct rsnd_dai *rdai)
 148 {
 149         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 150
 151         return 0;
 152 }
 153
 154 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 155                          struct rsnd_dai *rdai)
 156 {
 157         rsnd_mod_write(mod, CMD_CTRL, 0);
 158
 159         return 0;
 160 }
 161
 162 static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 163                                struct snd_ctl_elem_info *uinfo)
 164 {
 165         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 166
 167         uinfo->count = cfg->size;
 168         uinfo->value.integer.min = 0;
 169         uinfo->value.integer.max = cfg->max;
 170
 171         if (cfg->max == 1)
 172                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 173         else
 174                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 175
 176         return 0;
 177 }
 178
 179 static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 180                               struct snd_ctl_elem_value *ucontrol)
 181 {
 182         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 183         int i;
 184
 185         for (i = 0; i < cfg->size; i++)
 186                 ucontrol->value.integer.value[i] = cfg->val[i];
 187
 188         return 0;
 189 }
 190
 191 static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 192                               struct snd_ctl_elem_value *ucontrol)
 193 {
 194         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 195         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 196         int i, change = 0;
 197
 198         for (i = 0; i < cfg->size; i++) {
 199                 change |= (ucontrol->value.integer.value[i] != cfg->val[i]);
 200                 cfg->val[i] = ucontrol->value.integer.value[i];
 201         }
 202
 203         if (change)
 204                 rsnd_dvc_volume_update(mod);
 205
 206         return change;
 207 }
 208
 209 static int __rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 210                               struct rsnd_dai *rdai,
 211                               struct snd_soc_pcm_runtime *rtd,
 212                               const unsigned char *name,
 213                               struct rsnd_dvc_cfg *private)
 214 {
 215         struct snd_card *card = rtd->card->snd_card;
 216         struct snd_kcontrol *kctrl;
 217         struct snd_kcontrol_new knew = {
 218                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 219                 .name           = name,
 220                 .info           = rsnd_dvc_volume_info,
 221                 .get            = rsnd_dvc_volume_get,
 222                 .put            = rsnd_dvc_volume_put,
 223                 .private_value  = (unsigned long)private,
 224         };
 225         int ret;
 226
 227         kctrl = snd_ctl_new1(&knew, mod);
 228         if (!kctrl)
 229                 return -ENOMEM;
 230
 231         ret = snd_ctl_add(card, kctrl);
 232         if (ret < 0)
 233                 return ret;
 234
 235         return 0;
 236 }
 237
 238 static int _rsnd_dvc_pcm_new_m(struct rsnd_mod *mod,
 239                                struct rsnd_dai *rdai,
 240                                struct snd_soc_pcm_runtime *rtd,
 241                                const unsigned char *name,
 242                                struct rsnd_dvc_cfg_m *private,
 243                                u32 max)
 244 {
 245         private->cfg.max        = max;
 246         private->cfg.size       = RSND_DVC_CHANNELS;
 247         private->cfg.val        = private->val;
 248         return __rsnd_dvc_pcm_new(mod, rdai, rtd, name, &private->cfg);
 249 }
 250
 251 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 252                             struct rsnd_dai *rdai,
 253                             struct snd_soc_pcm_runtime *rtd)
 254 {
 255         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 256         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 257         int ret;
 258
 259         /* Volume */
 260         ret = _rsnd_dvc_pcm_new_m(mod, rdai, rtd,
 261                         rsnd_dai_is_play(rdai, io) ?
 262                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 263                         &dvc->volume, 0x00800000 - 1);
 264         if (ret < 0)
 265                 return ret;
 266
 267         /* Mute */
 268         ret = _rsnd_dvc_pcm_new_m(mod, rdai, rtd,
 269                         rsnd_dai_is_play(rdai, io) ?
 270                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 271                         &dvc->mute, 1);
 272         if (ret < 0)
 273                 return ret;
 274
 275         return 0;
 276 }
 277
 278 static struct rsnd_mod_ops rsnd_dvc_ops = {
 279         .name           = DVC_NAME,
 280         .probe          = rsnd_dvc_probe_gen2,
 281         .init           = rsnd_dvc_init,
 282         .quit           = rsnd_dvc_quit,
 283         .start          = rsnd_dvc_start,
 284         .stop           = rsnd_dvc_stop,
 285         .pcm_new        = rsnd_dvc_pcm_new,
 286 };
 287
 288 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 289 {
 290         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 291                 id = 0;
 292
 293         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 294 }
 295
 296 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 297                               const struct rsnd_of_data *of_data,
 298                               struct rsnd_priv *priv)
 299 {
 300         struct device_node *node;
 301         struct rsnd_dvc_platform_info *dvc_info;
 302         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 303         struct device *dev = &pdev->dev;
 304         int nr;
 305
 306         if (!of_data)
 307                 return;
 308
 309         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 310         if (!node)
 311                 return;
 312
 313         nr = of_get_child_count(node);
 314         if (!nr)
 315                 goto rsnd_of_parse_dvc_end;
 316
 317         dvc_info = devm_kzalloc(dev,
 318                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 319                                 GFP_KERNEL);
 320         if (!dvc_info) {
 321                 dev_err(dev, "dvc info allocation error\n");
 322                 goto rsnd_of_parse_dvc_end;
 323         }
 324
 325         info->dvc_info          = dvc_info;
 326         info->dvc_info_nr       = nr;
 327
 328 rsnd_of_parse_dvc_end:
 329         of_node_put(node);
 330 }
 331
 332 int rsnd_dvc_probe(struct platform_device *pdev,
 333                    const struct rsnd_of_data *of_data,
 334                    struct rsnd_priv *priv)
 335 {
 336         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 337         struct device *dev = rsnd_priv_to_dev(priv);
 338         struct rsnd_dvc *dvc;
 339         struct clk *clk;
 340         char name[RSND_DVC_NAME_SIZE];
 341         int i, nr;
 342
 343         rsnd_of_parse_dvc(pdev, of_data, priv);
 344
 345         nr = info->dvc_info_nr;
 346         if (!nr)
 347                 return 0;
 348
 349         /* This driver doesn't support Gen1 at this point */
 350         if (rsnd_is_gen1(priv)) {
 351                 dev_warn(dev, "CMD is not supported on Gen1\n");
 352                 return -EINVAL;
 353         }
 354
 355         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 356         if (!dvc) {
 357                 dev_err(dev, "CMD allocate failed\n");
 358                 return -ENOMEM;
 359         }
 360
 361         priv->dvc_nr    = nr;
 362         priv->dvc       = dvc;
 363
 364         for_each_rsnd_dvc(dvc, priv, i) {
 365                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 366                          DVC_NAME, i);
 367
 368                 clk = devm_clk_get(dev, name);
 369                 if (IS_ERR(clk))
 370                         return PTR_ERR(clk);
 371
 372                 dvc->info = &info->dvc_info[i];
 373                 dvc->clk  = clk;
 374
 375                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 376
 377                 dev_dbg(dev, "CMD%d probed\n", i);
 378         }
 379
 380         return 0;
 381 }