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         u32 path[] = {
  35                 [1] = 1 << 0,
  36                 [5] = 1 << 8,
  37                 [6] = 1 << 12,
  38                 [9] = 1 << 15,
  39         };
  40
  41         if (!mix && !dvc)
  42                 return 0;
  43
  44         if (ARRAY_SIZE(path) < rsnd_mod_id(mod) + 1)
  45                 return -ENXIO;
  46
  47         if (mix) {
  48                 struct rsnd_dai *rdai;
  49                 struct rsnd_mod *src;
  50                 struct rsnd_dai_stream *tio;
  51                 int i;
  52
  53                 /*
  54                  * it is assuming that integrater is well understanding about
  55                  * data path. Here doesn't check impossible connection,
  56                  * like src2 + src5
  57                  */
  58                 data = 0;
  59                 for_each_rsnd_dai(rdai, priv, i) {
  60                         tio = &rdai->playback;
  61                         src = rsnd_io_to_mod_src(tio);
  62                         if (mix == rsnd_io_to_mod_mix(tio))
  63                                 data |= path[rsnd_mod_id(src)];
  64
  65                         tio = &rdai->capture;
  66                         src = rsnd_io_to_mod_src(tio);
  67                         if (mix == rsnd_io_to_mod_mix(tio))
  68                                 data |= path[rsnd_mod_id(src)];
  69                 }
  70
  71         } else {
  72                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
  73
  74                 u8 cmd_case[] = {
  75                         [0] = 0x3,
  76                         [1] = 0x3,
  77                         [2] = 0x4,
  78                         [3] = 0x1,
  79                         [4] = 0x2,
  80                         [5] = 0x4,
  81                         [6] = 0x1,
  82                         [9] = 0x2,
  83                 };
  84
  85                 data = path[rsnd_mod_id(src)] |
  86                         cmd_case[rsnd_mod_id(src)] << 16;
  87         }
  88
  89         dev_dbg(dev, "ctu/mix path = 0x%08x", data);
  90
  91         rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
  92         rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
  93
  94         rsnd_adg_set_cmd_timsel_gen2(mod, io);
  95
  96         return 0;
  97 }
  98
  99 static int rsnd_cmd_start(struct rsnd_mod *mod,
 100                           struct rsnd_dai_stream *io,
 101                           struct rsnd_priv *priv)
 102 {
 103         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 104
 105         return 0;
 106 }
 107
 108 static int rsnd_cmd_stop(struct rsnd_mod *mod,
 109                          struct rsnd_dai_stream *io,
 110                          struct rsnd_priv *priv)
 111 {
 112         rsnd_mod_write(mod, CMD_CTRL, 0);
 113
 114         return 0;
 115 }
 116
 117 static struct rsnd_mod_ops rsnd_cmd_ops = {
 118         .name   = CMD_NAME,
 119         .init   = rsnd_cmd_init,
 120         .start  = rsnd_cmd_start,
 121         .stop   = rsnd_cmd_stop,
 122 };
 123
 124 int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
 125 {
 126         struct rsnd_priv *priv = rsnd_io_to_priv(io);
 127         struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);
 128
 129         return rsnd_dai_connect(mod, io, mod->type);
 130 }
 131
 132 struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
 133 {
 134         if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
 135                 id = 0;
 136
 137         return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
 138 }
 139
 140 int rsnd_cmd_probe(struct rsnd_priv *priv)
 141 {
 142         struct device *dev = rsnd_priv_to_dev(priv);
 143         struct rsnd_cmd *cmd;
 144         int i, nr, ret;
 145
 146         /* This driver doesn't support Gen1 at this point */
 147         if (rsnd_is_gen1(priv))
 148                 return 0;
 149
 150         /* same number as DVC */
 151         nr = priv->dvc_nr;
 152         if (!nr)
 153                 return 0;
 154
 155         cmd = devm_kzalloc(dev, sizeof(*cmd) * nr, GFP_KERNEL);
 156         if (!cmd)
 157                 return -ENOMEM;
 158
 159         priv->cmd_nr    = nr;
 160         priv->cmd       = cmd;
 161
 162         for_each_rsnd_cmd(cmd, priv, i) {
 163                 ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
 164                                     &rsnd_cmd_ops, NULL,
 165                                     rsnd_mod_get_status, RSND_MOD_CMD, i);
 166                 if (ret)
 167                         return ret;
 168         }
 169
 170         return 0;
 171 }
 172
 173 void rsnd_cmd_remove(struct rsnd_priv *priv)
 174 {
 175         struct rsnd_cmd *cmd;
 176         int i;
 177
 178         for_each_rsnd_cmd(cmd, priv, i) {
 179                 rsnd_mod_quit(rsnd_mod_get(cmd));
 180         }
 181 }