LXR linux/sound/soc/sh/rcar/mix.c

   1/*
   2 * mix.c
   3 *
   4 * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10#include "rsnd.h"
  11
  12#define MIX_NAME_SIZE   16
  13#define MIX_NAME "mix"
  14
  15struct rsnd_mix {
  16        struct rsnd_mod mod;
  17};
  18
  19#define rsnd_mix_get(priv, id) ((struct rsnd_mix *)(priv->mix) + id)
  20#define rsnd_mix_nr(priv) ((priv)->mix_nr)
  21#define for_each_rsnd_mix(pos, priv, i)                                 \
  22        for ((i) = 0;                                                   \
  23             ((i) < rsnd_mix_nr(priv)) &&                               \
  24                     ((pos) = (struct rsnd_mix *)(priv)->mix + i);      \
  25             i++)
  26
  27static void rsnd_mix_activation(struct rsnd_mod *mod)
  28{
  29        rsnd_mod_write(mod, MIX_SWRSR, 0);
  30        rsnd_mod_write(mod, MIX_SWRSR, 1);
  31}
  32
  33static void rsnd_mix_halt(struct rsnd_mod *mod)
  34{
  35        rsnd_mod_write(mod, MIX_MIXIR, 1);
  36        rsnd_mod_write(mod, MIX_SWRSR, 0);
  37}
  38
  39static void rsnd_mix_volume_parameter(struct rsnd_dai_stream *io,
  40                                      struct rsnd_mod *mod)
  41{
  42        rsnd_mod_write(mod, MIX_MDBAR, 0);
  43        rsnd_mod_write(mod, MIX_MDBBR, 0);
  44        rsnd_mod_write(mod, MIX_MDBCR, 0);
  45        rsnd_mod_write(mod, MIX_MDBDR, 0);
  46}
  47
  48static void rsnd_mix_volume_init(struct rsnd_dai_stream *io,
  49                                 struct rsnd_mod *mod)
  50{
  51        rsnd_mod_write(mod, MIX_MIXIR, 1);
  52
  53        /* General Information */
  54        rsnd_mod_write(mod, MIX_ADINR, rsnd_runtime_channel_after_ctu(io));
  55
  56        /* volume step */
  57        rsnd_mod_write(mod, MIX_MIXMR, 0);
  58        rsnd_mod_write(mod, MIX_MVPDR, 0);
  59
  60        /* common volume parameter */
  61        rsnd_mix_volume_parameter(io, mod);
  62
  63        rsnd_mod_write(mod, MIX_MIXIR, 0);
  64}
  65
  66static void rsnd_mix_volume_update(struct rsnd_dai_stream *io,
  67                                  struct rsnd_mod *mod)
  68{
  69        /* Disable MIX dB setting */
  70        rsnd_mod_write(mod, MIX_MDBER, 0);
  71
  72        /* common volume parameter */
  73        rsnd_mix_volume_parameter(io, mod);
  74
  75        /* Enable MIX dB setting */
  76        rsnd_mod_write(mod, MIX_MDBER, 1);
  77}
  78
  79static int rsnd_mix_probe_(struct rsnd_mod *mod,
  80                           struct rsnd_dai_stream *io,
  81                           struct rsnd_priv *priv)
  82{
  83        return rsnd_cmd_attach(io, rsnd_mod_id(mod));
  84}
  85
  86static int rsnd_mix_init(struct rsnd_mod *mod,
  87                         struct rsnd_dai_stream *io,
  88                         struct rsnd_priv *priv)
  89{
  90        rsnd_mod_power_on(mod);
  91
  92        rsnd_mix_activation(mod);
  93
  94        rsnd_mix_volume_init(io, mod);
  95
  96        rsnd_mix_volume_update(io, mod);
  97
  98        return 0;
  99}
 100
 101static int rsnd_mix_quit(struct rsnd_mod *mod,
 102                         struct rsnd_dai_stream *io,
 103                         struct rsnd_priv *priv)
 104{
 105        rsnd_mix_halt(mod);
 106
 107        rsnd_mod_power_off(mod);
 108
 109        return 0;
 110}
 111
 112static struct rsnd_mod_ops rsnd_mix_ops = {
 113        .name           = MIX_NAME,
 114        .probe          = rsnd_mix_probe_,
 115        .init           = rsnd_mix_init,
 116        .quit           = rsnd_mix_quit,
 117};
 118
 119struct rsnd_mod *rsnd_mix_mod_get(struct rsnd_priv *priv, int id)
 120{
 121        if (WARN_ON(id < 0 || id >= rsnd_mix_nr(priv)))
 122                id = 0;
 123
 124        return rsnd_mod_get(rsnd_mix_get(priv, id));
 125}
 126
 127int rsnd_mix_probe(struct rsnd_priv *priv)
 128{
 129        struct device_node *node;
 130        struct device_node *np;
 131        struct device *dev = rsnd_priv_to_dev(priv);
 132        struct rsnd_mix *mix;
 133        struct clk *clk;
 134        char name[MIX_NAME_SIZE];
 135        int i, nr, ret;
 136
 137        /* This driver doesn't support Gen1 at this point */
 138        if (rsnd_is_gen1(priv))
 139                return 0;
 140
 141        node = rsnd_mix_of_node(priv);
 142        if (!node)
 143                return 0; /* not used is not error */
 144
 145        nr = of_get_child_count(node);
 146        if (!nr) {
 147                ret = -EINVAL;
 148                goto rsnd_mix_probe_done;
 149        }
 150
 151        mix     = devm_kzalloc(dev, sizeof(*mix) * nr, GFP_KERNEL);
 152        if (!mix) {
 153                ret = -ENOMEM;
 154                goto rsnd_mix_probe_done;
 155        }
 156
 157        priv->mix_nr    = nr;
 158        priv->mix       = mix;
 159
 160        i = 0;
 161        ret = 0;
 162        for_each_child_of_node(node, np) {
 163                mix = rsnd_mix_get(priv, i);
 164
 165                snprintf(name, MIX_NAME_SIZE, "%s.%d",
 166                         MIX_NAME, i);
 167
 168                clk = devm_clk_get(dev, name);
 169                if (IS_ERR(clk)) {
 170                        ret = PTR_ERR(clk);
 171                        goto rsnd_mix_probe_done;
 172                }
 173
 174                ret = rsnd_mod_init(priv, rsnd_mod_get(mix), &rsnd_mix_ops,
 175                                    clk, rsnd_mod_get_status, RSND_MOD_MIX, i);
 176                if (ret)
 177                        goto rsnd_mix_probe_done;
 178
 179                i++;
 180        }
 181
 182rsnd_mix_probe_done:
 183        of_node_put(node);
 184
 185        return ret;
 186}
 187
 188void rsnd_mix_remove(struct rsnd_priv *priv)
 189{
 190        struct rsnd_mix *mix;
 191        int i;
 192
 193        for_each_rsnd_mix(mix, priv, i) {
 194                rsnd_mod_quit(rsnd_mod_get(mix));
 195        }
 196}
 197