sound/soc/sh/rcar/cmd.c

   1 /*
   2  * Renesas R-Car CMD support
   3  *
   4  * Copyright (C) 2015 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 struct rsnd_cmd {
  14         struct rsnd_mod mod;
  15 };
  16
  17 #define CMD_NAME "cmd"
  18
  19 #define rsnd_cmd_nr(priv) ((priv)->cmd_nr)
  20 #define for_each_rsnd_cmd(pos, priv, i)                                 \
  21         for ((i) = 0;                                                   \
  22              ((i) < rsnd_cmd_nr(priv)) &&                               \
  23                      ((pos) = (struct rsnd_cmd *)(priv)->cmd + i);      \
  24              i++)
  25
  26 static int rsnd_cmd_init(struct rsnd_mod *mod,
  27                          struct rsnd_dai_stream *io,
  28                          struct rsnd_priv *priv)
  29 {
  30         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
  31         struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
  32         struct device *dev = rsnd_priv_to_dev(priv);
  33         u32 data;
  34
  35         if (!mix && !dvc)
  36                 return 0;
  37
  38         if (mix) {
  39                 struct rsnd_dai *rdai;
  40                 struct rsnd_mod *src;
  41                 struct rsnd_dai_stream *tio;
  42                 int i;
  43                 u32 path[] = {
  44                         [0] = 0,
  45                         [1] = 1 << 0,
  46                         [2] = 0,
  47                         [3] = 0,
  48                         [4] = 0,
  49                         [5] = 1 << 8
  50                 };
  51
  52                 /*
  53                  * it is assuming that integrater is well understanding about
  54                  * data path. Here doesn't check impossible connection,
  55                  * like src2 + src5
  56                  */
  57                 data = 0;
  58                 for_each_rsnd_dai(rdai, priv, i) {
  59                         tio = &rdai->playback;
  60                         src = rsnd_io_to_mod_src(tio);
  61                         if (mix == rsnd_io_to_mod_mix(tio))
  62                                 data |= path[rsnd_mod_id(src)];
  63
  64                         tio = &rdai->capture;
  65                         src = rsnd_io_to_mod_src(tio);
  66                         if (mix == rsnd_io_to_mod_mix(tio))
  67                                 data |= path[rsnd_mod_id(src)];
  68                 }
  69
  70         } else {
  71                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
  72
  73                 u32 path[] = {
  74                         [0] = 0x30000,
  75                         [1] = 0x30001,
  76                         [2] = 0x40000,
  77                         [3] = 0x10000,
  78                         [4] = 0x20000,
  79                         [5] = 0x40100
  80                 };
  81
  82                 data = path[rsnd_mod_id(src)];
  83         }
  84
  85         dev_dbg(dev, "ctu/mix path = 0x%08x", data);
  86
  87         rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
  88         rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
  89
  90         rsnd_adg_set_cmd_timsel_gen2(mod, io);
  91
  92         return 0;
  93 }
  94
  95 static int rsnd_cmd_start(struct rsnd_mod *mod,
  96                           struct rsnd_dai_stream *io,
  97                           struct rsnd_priv *priv)
  98 {
  99         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 100
 101         return 0;
 102 }
 103
 104 static int rsnd_cmd_stop(struct rsnd_mod *mod,
 105                          struct rsnd_dai_stream *io,
 106                          struct rsnd_priv *priv)
 107 {
 108         rsnd_mod_write(mod, CMD_CTRL, 0);
 109
 110         return 0;
 111 }
 112
 113 static struct rsnd_mod_ops rsnd_cmd_ops = {
 114         .name   = CMD_NAME,
 115         .init   = rsnd_cmd_init,
 116         .start  = rsnd_cmd_start,
 117         .stop   = rsnd_cmd_stop,
 118 };
 119
 120 int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
 121 {
 122         struct rsnd_priv *priv = rsnd_io_to_priv(io);
 123         struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);
 124
 125         return rsnd_dai_connect(mod, io, mod->type);
 126 }
 127
 128 struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
 129 {
 130         if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
 131                 id = 0;
 132
 133         return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
 134 }
 135
 136 int rsnd_cmd_probe(struct rsnd_priv *priv)
 137 {
 138         struct device *dev = rsnd_priv_to_dev(priv);
 139         struct rsnd_cmd *cmd;
 140         int i, nr, ret;
 141
 142         /* This driver doesn't support Gen1 at this point */
 143         if (rsnd_is_gen1(priv))
 144                 return 0;
 145
 146         /* same number as DVC */
 147         nr = priv->dvc_nr;
 148         if (!nr)
 149                 return 0;
 150
 151         cmd = devm_kzalloc(dev, sizeof(*cmd) * nr, GFP_KERNEL);
 152         if (!cmd)
 153                 return -ENOMEM;
 154
 155         priv->cmd_nr    = nr;
 156         priv->cmd       = cmd;
 157
 158         for_each_rsnd_cmd(cmd, priv, i) {
 159                 ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
 160                                     &rsnd_cmd_ops, NULL,
 161                                     rsnd_mod_get_status, RSND_MOD_CMD, i);
 162                 if (ret)
 163                         return ret;
 164         }
 165
 166         return 0;
 167 }
 168
 169 void rsnd_cmd_remove(struct rsnd_priv *priv)
 170 {
 171         struct rsnd_cmd *cmd;
 172         int i;
 173
 174         for_each_rsnd_cmd(cmd, priv, i) {
 175                 rsnd_mod_quit(rsnd_mod_get(cmd));
 176         }
 177 }