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 snd_card *card = rtd->card->snd_card;
 195         struct snd_kcontrol *kctrl;
 196         static struct snd_kcontrol_new knew = {
 197                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 198                 .info           = rsnd_dvc_volume_info,
 199                 .get            = rsnd_dvc_volume_get,
 200                 .put            = rsnd_dvc_volume_put,
 201         };
 202         int ret;
 203
 204         if (rsnd_dai_is_play(rdai, io))
 205                 knew.name = "Playback Volume";
 206         else
 207                 knew.name = "Capture Volume";
 208
 209         kctrl = snd_ctl_new1(&knew, mod);
 210         if (!kctrl)
 211                 return -ENOMEM;
 212
 213         ret = snd_ctl_add(card, kctrl);
 214         if (ret < 0)
 215                 return ret;
 216
 217         return 0;
 218 }
 219
 220 static struct rsnd_mod_ops rsnd_dvc_ops = {
 221         .name           = DVC_NAME,
 222         .probe          = rsnd_dvc_probe_gen2,
 223         .init           = rsnd_dvc_init,
 224         .quit           = rsnd_dvc_quit,
 225         .start          = rsnd_dvc_start,
 226         .stop           = rsnd_dvc_stop,
 227         .pcm_new        = rsnd_dvc_pcm_new,
 228 };
 229
 230 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 231 {
 232         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 233                 id = 0;
 234
 235         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 236 }
 237
 238 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 239                               const struct rsnd_of_data *of_data,
 240                               struct rsnd_priv *priv)
 241 {
 242         struct device_node *node;
 243         struct rsnd_dvc_platform_info *dvc_info;
 244         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 245         struct device *dev = &pdev->dev;
 246         int nr;
 247
 248         if (!of_data)
 249                 return;
 250
 251         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 252         if (!node)
 253                 return;
 254
 255         nr = of_get_child_count(node);
 256         if (!nr)
 257                 goto rsnd_of_parse_dvc_end;
 258
 259         dvc_info = devm_kzalloc(dev,
 260                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 261                                 GFP_KERNEL);
 262         if (!dvc_info) {
 263                 dev_err(dev, "dvc info allocation error\n");
 264                 goto rsnd_of_parse_dvc_end;
 265         }
 266
 267         info->dvc_info          = dvc_info;
 268         info->dvc_info_nr       = nr;
 269
 270 rsnd_of_parse_dvc_end:
 271         of_node_put(node);
 272 }
 273
 274 int rsnd_dvc_probe(struct platform_device *pdev,
 275                    const struct rsnd_of_data *of_data,
 276                    struct rsnd_priv *priv)
 277 {
 278         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 279         struct device *dev = rsnd_priv_to_dev(priv);
 280         struct rsnd_dvc *dvc;
 281         struct clk *clk;
 282         char name[RSND_DVC_NAME_SIZE];
 283         int i, nr;
 284
 285         rsnd_of_parse_dvc(pdev, of_data, priv);
 286
 287         nr = info->dvc_info_nr;
 288         if (!nr)
 289                 return 0;
 290
 291         /* This driver doesn't support Gen1 at this point */
 292         if (rsnd_is_gen1(priv)) {
 293                 dev_warn(dev, "CMD is not supported on Gen1\n");
 294                 return -EINVAL;
 295         }
 296
 297         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 298         if (!dvc) {
 299                 dev_err(dev, "CMD allocate failed\n");
 300                 return -ENOMEM;
 301         }
 302
 303         priv->dvc_nr    = nr;
 304         priv->dvc       = dvc;
 305
 306         for_each_rsnd_dvc(dvc, priv, i) {
 307                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 308                          DVC_NAME, i);
 309
 310                 clk = devm_clk_get(dev, name);
 311                 if (IS_ERR(clk))
 312                         return PTR_ERR(clk);
 313
 314                 dvc->info = &info->dvc_info[i];
 315                 dvc->clk  = clk;
 316
 317                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 318
 319                 dev_dbg(dev, "CMD%d probed\n", i);
 320         }
 321
 322         return 0;
 323 }