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_VOLUME_MAX     100
  15 #define RSND_DVC_VOLUME_NUM     2
  16
  17 #define DVC_NAME "dvc"
  18
  19 struct rsnd_dvc {
  20         struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
  21         struct rsnd_mod mod;
  22         struct clk *clk;
  23         u8 volume[RSND_DVC_VOLUME_NUM];
  24         u8 mute[RSND_DVC_VOLUME_NUM];
  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 void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  37 {
  38         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  39         u32 max = (0x00800000 - 1);
  40         u32 vol[RSND_DVC_VOLUME_NUM];
  41         u32 mute = 0;
  42         int i;
  43
  44         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++) {
  45                 vol[i] = max / RSND_DVC_VOLUME_MAX * dvc->volume[i];
  46                 mute |= (!!dvc->mute[i]) << i;
  47         }
  48
  49         rsnd_mod_write(mod, DVC_VOL0R, vol[0]);
  50         rsnd_mod_write(mod, DVC_VOL1R, vol[1]);
  51
  52         rsnd_mod_write(mod, DVC_ZCMCR, mute);
  53 }
  54
  55 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
  56                                struct rsnd_dai *rdai)
  57 {
  58         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
  59         struct device *dev = rsnd_priv_to_dev(priv);
  60
  61         dev_dbg(dev, "%s (Gen2) is probed\n", rsnd_mod_name(mod));
  62
  63         return 0;
  64 }
  65
  66 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
  67                          struct rsnd_dai *rdai)
  68 {
  69         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
  70         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
  71         struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
  72         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
  73         struct device *dev = rsnd_priv_to_dev(priv);
  74         int dvc_id = rsnd_mod_id(dvc_mod);
  75         int src_id = rsnd_mod_id(src_mod);
  76         u32 route[] = {
  77                 [0] = 0x30000,
  78                 [1] = 0x30001,
  79                 [2] = 0x40000,
  80                 [3] = 0x10000,
  81                 [4] = 0x20000,
  82                 [5] = 0x40100
  83         };
  84
  85         if (src_id >= ARRAY_SIZE(route)) {
  86                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
  87                 return -EINVAL;
  88         }
  89
  90         clk_prepare_enable(dvc->clk);
  91
  92         /*
  93          * fixme
  94          * it doesn't support CTU/MIX
  95          */
  96         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
  97
  98         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
  99         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
 100
 101         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
 102
 103         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
 104
 105         /*  enable Volume / Mute */
 106         rsnd_mod_write(dvc_mod, DVC_DVUCR, 0x101);
 107
 108         /* ch0/ch1 Volume */
 109         rsnd_dvc_volume_update(dvc_mod);
 110
 111         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 112
 113         rsnd_mod_write(dvc_mod, DVC_DVUER, 1);
 114
 115         rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
 116
 117         return 0;
 118 }
 119
 120 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 121                          struct rsnd_dai *rdai)
 122 {
 123         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 124
 125         clk_disable_unprepare(dvc->clk);
 126
 127         return 0;
 128 }
 129
 130 static int rsnd_dvc_start(struct rsnd_mod *mod,
 131                           struct rsnd_dai *rdai)
 132 {
 133         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 134
 135         return 0;
 136 }
 137
 138 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 139                          struct rsnd_dai *rdai)
 140 {
 141         rsnd_mod_write(mod, CMD_CTRL, 0);
 142
 143         return 0;
 144 }
 145
 146 static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 147                                struct snd_ctl_elem_info *uinfo)
 148 {
 149         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 150         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 151         u8 *val = (u8 *)kctrl->private_value;
 152
 153         uinfo->count = RSND_DVC_VOLUME_NUM;
 154         uinfo->value.integer.min = 0;
 155
 156         if (val == dvc->volume) {
 157                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 158                 uinfo->value.integer.max = RSND_DVC_VOLUME_MAX;
 159         } else {
 160                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 161                 uinfo->value.integer.max = 1;
 162         }
 163
 164         return 0;
 165 }
 166
 167 static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 168                               struct snd_ctl_elem_value *ucontrol)
 169 {
 170         u8 *val = (u8 *)kctrl->private_value;
 171         int i;
 172
 173         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
 174                 ucontrol->value.integer.value[i] = val[i];
 175
 176         return 0;
 177 }
 178
 179 static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 180                               struct snd_ctl_elem_value *ucontrol)
 181 {
 182         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 183         u8 *val = (u8 *)kctrl->private_value;
 184         int i, change = 0;
 185
 186         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++) {
 187                 change |= (ucontrol->value.integer.value[i] != val[i]);
 188                 val[i] = ucontrol->value.integer.value[i];
 189         }
 190
 191         if (change)
 192                 rsnd_dvc_volume_update(mod);
 193
 194         return change;
 195 }
 196
 197 static int __rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 198                               struct rsnd_dai *rdai,
 199                               struct snd_soc_pcm_runtime *rtd,
 200                               const unsigned char *name,
 201                               u8 *private)
 202 {
 203         struct snd_card *card = rtd->card->snd_card;
 204         struct snd_kcontrol *kctrl;
 205         struct snd_kcontrol_new knew = {
 206                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 207                 .name           = name,
 208                 .info           = rsnd_dvc_volume_info,
 209                 .get            = rsnd_dvc_volume_get,
 210                 .put            = rsnd_dvc_volume_put,
 211                 .private_value  = (unsigned long)private,
 212         };
 213         int ret;
 214
 215         kctrl = snd_ctl_new1(&knew, mod);
 216         if (!kctrl)
 217                 return -ENOMEM;
 218
 219         ret = snd_ctl_add(card, kctrl);
 220         if (ret < 0)
 221                 return ret;
 222
 223         return 0;
 224 }
 225
 226 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 227                             struct rsnd_dai *rdai,
 228                             struct snd_soc_pcm_runtime *rtd)
 229 {
 230         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 231         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 232         int ret;
 233
 234         /* Volume */
 235         ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
 236                         rsnd_dai_is_play(rdai, io) ?
 237                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 238                         dvc->volume);
 239         if (ret < 0)
 240                 return ret;
 241
 242         /* Mute */
 243         ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
 244                         rsnd_dai_is_play(rdai, io) ?
 245                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 246                         dvc->mute);
 247         if (ret < 0)
 248                 return ret;
 249
 250         return 0;
 251 }
 252
 253 static struct rsnd_mod_ops rsnd_dvc_ops = {
 254         .name           = DVC_NAME,
 255         .probe          = rsnd_dvc_probe_gen2,
 256         .init           = rsnd_dvc_init,
 257         .quit           = rsnd_dvc_quit,
 258         .start          = rsnd_dvc_start,
 259         .stop           = rsnd_dvc_stop,
 260         .pcm_new        = rsnd_dvc_pcm_new,
 261 };
 262
 263 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 264 {
 265         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 266                 id = 0;
 267
 268         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 269 }
 270
 271 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 272                               const struct rsnd_of_data *of_data,
 273                               struct rsnd_priv *priv)
 274 {
 275         struct device_node *node;
 276         struct rsnd_dvc_platform_info *dvc_info;
 277         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 278         struct device *dev = &pdev->dev;
 279         int nr;
 280
 281         if (!of_data)
 282                 return;
 283
 284         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 285         if (!node)
 286                 return;
 287
 288         nr = of_get_child_count(node);
 289         if (!nr)
 290                 goto rsnd_of_parse_dvc_end;
 291
 292         dvc_info = devm_kzalloc(dev,
 293                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 294                                 GFP_KERNEL);
 295         if (!dvc_info) {
 296                 dev_err(dev, "dvc info allocation error\n");
 297                 goto rsnd_of_parse_dvc_end;
 298         }
 299
 300         info->dvc_info          = dvc_info;
 301         info->dvc_info_nr       = nr;
 302
 303 rsnd_of_parse_dvc_end:
 304         of_node_put(node);
 305 }
 306
 307 int rsnd_dvc_probe(struct platform_device *pdev,
 308                    const struct rsnd_of_data *of_data,
 309                    struct rsnd_priv *priv)
 310 {
 311         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 312         struct device *dev = rsnd_priv_to_dev(priv);
 313         struct rsnd_dvc *dvc;
 314         struct clk *clk;
 315         char name[RSND_DVC_NAME_SIZE];
 316         int i, nr;
 317
 318         rsnd_of_parse_dvc(pdev, of_data, priv);
 319
 320         nr = info->dvc_info_nr;
 321         if (!nr)
 322                 return 0;
 323
 324         /* This driver doesn't support Gen1 at this point */
 325         if (rsnd_is_gen1(priv)) {
 326                 dev_warn(dev, "CMD is not supported on Gen1\n");
 327                 return -EINVAL;
 328         }
 329
 330         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 331         if (!dvc) {
 332                 dev_err(dev, "CMD allocate failed\n");
 333                 return -ENOMEM;
 334         }
 335
 336         priv->dvc_nr    = nr;
 337         priv->dvc       = dvc;
 338
 339         for_each_rsnd_dvc(dvc, priv, i) {
 340                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 341                          DVC_NAME, i);
 342
 343                 clk = devm_clk_get(dev, name);
 344                 if (IS_ERR(clk))
 345                         return PTR_ERR(clk);
 346
 347                 dvc->info = &info->dvc_info[i];
 348                 dvc->clk  = clk;
 349
 350                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 351
 352                 dev_dbg(dev, "CMD%d probed\n", i);
 353         }
 354
 355         return 0;
 356 }