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         long volume[RSND_DVC_VOLUME_NUM];
  24 };
  25
  26 #define rsnd_mod_to_dvc(_mod)   \
  27         container_of((_mod), struct rsnd_dvc, mod)
  28
  29 #define for_each_rsnd_dvc(pos, priv, i)                         \
  30         for ((i) = 0;                                           \
  31              ((i) < rsnd_dvc_nr(priv)) &&                       \
  32              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  33              i++)
  34
  35 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  36 {
  37         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  38         u32 max = (0x00800000 - 1);
  39         u32 vol[RSND_DVC_VOLUME_NUM];
  40         int i;
  41
  42         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
  43                 vol[i] = max / RSND_DVC_VOLUME_MAX * dvc->volume[i];
  44
  45         rsnd_mod_write(mod, DVC_VOL0R, vol[0]);
  46         rsnd_mod_write(mod, DVC_VOL1R, vol[1]);
  47 }
  48
  49 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
  50                                struct rsnd_dai *rdai)
  51 {
  52         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
  53         struct device *dev = rsnd_priv_to_dev(priv);
  54
  55         dev_dbg(dev, "%s (Gen2) is probed\n", rsnd_mod_name(mod));
  56
  57         return 0;
  58 }
  59
  60 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
  61                          struct rsnd_dai *rdai)
  62 {
  63         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
  64         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
  65         struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
  66         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
  67         struct device *dev = rsnd_priv_to_dev(priv);
  68         int dvc_id = rsnd_mod_id(dvc_mod);
  69         int src_id = rsnd_mod_id(src_mod);
  70         u32 route[] = {
  71                 [0] = 0x30000,
  72                 [1] = 0x30001,
  73                 [2] = 0x40000,
  74                 [3] = 0x10000,
  75                 [4] = 0x20000,
  76                 [5] = 0x40100
  77         };
  78
  79         if (src_id >= ARRAY_SIZE(route)) {
  80                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
  81                 return -EINVAL;
  82         }
  83
  84         clk_prepare_enable(dvc->clk);
  85
  86         /*
  87          * fixme
  88          * it doesn't support CTU/MIX
  89          */
  90         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
  91
  92         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
  93         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
  94
  95         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
  96
  97         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
  98
  99         /*  enable Volume  */
 100         rsnd_mod_write(dvc_mod, DVC_DVUCR, 0x100);
 101
 102         /* ch0/ch1 Volume */
 103         rsnd_dvc_volume_update(dvc_mod);
 104
 105         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 106
 107         rsnd_mod_write(dvc_mod, DVC_DVUER, 1);
 108
 109         rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
 110
 111         return 0;
 112 }
 113
 114 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 115                          struct rsnd_dai *rdai)
 116 {
 117         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 118
 119         clk_disable_unprepare(dvc->clk);
 120
 121         return 0;
 122 }
 123
 124 static int rsnd_dvc_start(struct rsnd_mod *mod,
 125                           struct rsnd_dai *rdai)
 126 {
 127         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 128
 129         return 0;
 130 }
 131
 132 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 133                          struct rsnd_dai *rdai)
 134 {
 135         rsnd_mod_write(mod, CMD_CTRL, 0);
 136
 137         return 0;
 138 }
 139
 140 static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 141                                struct snd_ctl_elem_info *uinfo)
 142 {
 143         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 144         uinfo->count = RSND_DVC_VOLUME_NUM;
 145         uinfo->value.integer.min = 0;
 146         uinfo->value.integer.max = RSND_DVC_VOLUME_MAX;
 147
 148         return 0;
 149 }
 150
 151 static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 152                               struct snd_ctl_elem_value *ucontrol)
 153 {
 154         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 155         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 156         int i;
 157
 158         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
 159                 ucontrol->value.integer.value[i] = dvc->volume[i];
 160
 161         return 0;
 162 }
 163
 164 static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 165                               struct snd_ctl_elem_value *ucontrol)
 166 {
 167         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 168         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 169         int i, change = 0;
 170
 171         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++) {
 172                 if (ucontrol->value.integer.value[i] < 0 ||
 173                     ucontrol->value.integer.value[i] > RSND_DVC_VOLUME_MAX)
 174                         return -EINVAL;
 175
 176                 change |= (ucontrol->value.integer.value[i] != dvc->volume[i]);
 177         }
 178
 179         if (change) {
 180                 for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
 181                         dvc->volume[i] = ucontrol->value.integer.value[i];
 182
 183                 rsnd_dvc_volume_update(mod);
 184         }
 185
 186         return change;
 187 }
 188
 189 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 190                             struct rsnd_dai *rdai,
 191                             struct snd_soc_pcm_runtime *rtd)
 192 {
 193         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 194         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 195         struct device *dev = rsnd_priv_to_dev(priv);
 196         struct snd_card *card = rtd->card->snd_card;
 197         struct snd_kcontrol *kctrl;
 198         static struct snd_kcontrol_new knew = {
 199                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 200                 .name           = "Playback Volume",
 201                 .info           = rsnd_dvc_volume_info,
 202                 .get            = rsnd_dvc_volume_get,
 203                 .put            = rsnd_dvc_volume_put,
 204         };
 205         int ret;
 206
 207         if (!rsnd_dai_is_play(rdai, io)) {
 208                 dev_err(dev, "DVC%d is connected to Capture DAI\n",
 209                         rsnd_mod_id(mod));
 210                 return -EINVAL;
 211         }
 212
 213         kctrl = snd_ctl_new1(&knew, mod);
 214         if (!kctrl)
 215                 return -ENOMEM;
 216
 217         ret = snd_ctl_add(card, kctrl);
 218         if (ret < 0)
 219                 return ret;
 220
 221         return 0;
 222 }
 223
 224 static struct rsnd_mod_ops rsnd_dvc_ops = {
 225         .name           = DVC_NAME,
 226         .probe          = rsnd_dvc_probe_gen2,
 227         .init           = rsnd_dvc_init,
 228         .quit           = rsnd_dvc_quit,
 229         .start          = rsnd_dvc_start,
 230         .stop           = rsnd_dvc_stop,
 231         .pcm_new        = rsnd_dvc_pcm_new,
 232 };
 233
 234 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 235 {
 236         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 237                 id = 0;
 238
 239         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 240 }
 241
 242 int rsnd_dvc_probe(struct platform_device *pdev,
 243                    const struct rsnd_of_data *of_data,
 244                    struct rsnd_priv *priv)
 245 {
 246         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 247         struct device *dev = rsnd_priv_to_dev(priv);
 248         struct rsnd_dvc *dvc;
 249         struct clk *clk;
 250         char name[RSND_DVC_NAME_SIZE];
 251         int i, nr;
 252
 253         nr = info->dvc_info_nr;
 254         if (!nr)
 255                 return 0;
 256
 257         /* This driver doesn't support Gen1 at this point */
 258         if (rsnd_is_gen1(priv)) {
 259                 dev_warn(dev, "CMD is not supported on Gen1\n");
 260                 return -EINVAL;
 261         }
 262
 263         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 264         if (!dvc) {
 265                 dev_err(dev, "CMD allocate failed\n");
 266                 return -ENOMEM;
 267         }
 268
 269         priv->dvc_nr    = nr;
 270         priv->dvc       = dvc;
 271
 272         for_each_rsnd_dvc(dvc, priv, i) {
 273                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 274                          DVC_NAME, i);
 275
 276                 clk = devm_clk_get(dev, name);
 277                 if (IS_ERR(clk))
 278                         return PTR_ERR(clk);
 279
 280                 dvc->info = &info->dvc_info[i];
 281                 dvc->clk  = clk;
 282
 283                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 284
 285                 dev_dbg(dev, "CMD%d probed\n", i);
 286         }
 287
 288         return 0;
 289 }