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
  15 struct rsnd_mix {
  16         struct rsnd_mix_platform_info *info; /* rcar_snd.h */
  17         struct rsnd_mod mod;
  18 };
  19
  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
  27
  28 static void rsnd_mix_soft_reset(struct rsnd_mod *mod)
  29 {
  30         rsnd_mod_write(mod, MIX_SWRSR, 0);
  31         rsnd_mod_write(mod, MIX_SWRSR, 1);
  32 }
  33
  34 #define rsnd_mix_initialize_lock(mod)   __rsnd_mix_initialize_lock(mod, 1)
  35 #define rsnd_mix_initialize_unlock(mod) __rsnd_mix_initialize_lock(mod, 0)
  36 static void __rsnd_mix_initialize_lock(struct rsnd_mod *mod, u32 enable)
  37 {
  38         rsnd_mod_write(mod, MIX_MIXIR, enable);
  39 }
  40
  41 static void rsnd_mix_volume_update(struct rsnd_dai_stream *io,
  42                                   struct rsnd_mod *mod)
  43 {
  44
  45         /* Disable MIX dB setting */
  46         rsnd_mod_write(mod, MIX_MDBER, 0);
  47
  48         rsnd_mod_write(mod, MIX_MDBAR, 0);
  49         rsnd_mod_write(mod, MIX_MDBBR, 0);
  50         rsnd_mod_write(mod, MIX_MDBCR, 0);
  51         rsnd_mod_write(mod, MIX_MDBDR, 0);
  52
  53         /* Enable MIX dB setting */
  54         rsnd_mod_write(mod, MIX_MDBER, 1);
  55 }
  56
  57 static int rsnd_mix_init(struct rsnd_mod *mod,
  58                          struct rsnd_dai_stream *io,
  59                          struct rsnd_priv *priv)
  60 {
  61         rsnd_mod_hw_start(mod);
  62
  63         rsnd_mix_soft_reset(mod);
  64
  65         rsnd_mix_initialize_lock(mod);
  66
  67         rsnd_mod_write(mod, MIX_ADINR, rsnd_get_adinr_chan(mod, io));
  68
  69         rsnd_path_parse(priv, io);
  70
  71         /* volume step */
  72         rsnd_mod_write(mod, MIX_MIXMR, 0);
  73         rsnd_mod_write(mod, MIX_MVPDR, 0);
  74
  75         rsnd_mix_volume_update(io, mod);
  76
  77         rsnd_mix_initialize_unlock(mod);
  78
  79         return 0;
  80 }
  81
  82 static int rsnd_mix_quit(struct rsnd_mod *mod,
  83                          struct rsnd_dai_stream *io,
  84                          struct rsnd_priv *priv)
  85 {
  86         rsnd_mod_hw_stop(mod);
  87
  88         return 0;
  89 }
  90
  91 static struct rsnd_mod_ops rsnd_mix_ops = {
  92         .name           = MIX_NAME,
  93         .init           = rsnd_mix_init,
  94         .quit           = rsnd_mix_quit,
  95 };
  96
  97 struct rsnd_mod *rsnd_mix_mod_get(struct rsnd_priv *priv, int id)
  98 {
  99         if (WARN_ON(id < 0 || id >= rsnd_mix_nr(priv)))
 100                 id = 0;
 101
 102         return &((struct rsnd_mix *)(priv->mix) + id)->mod;
 103 }
 104
 105 static void rsnd_of_parse_mix(struct platform_device *pdev,
 106                               const struct rsnd_of_data *of_data,
 107                               struct rsnd_priv *priv)
 108 {
 109         struct device_node *node;
 110         struct rsnd_mix_platform_info *mix_info;
 111         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 112         struct device *dev = &pdev->dev;
 113         int nr;
 114
 115         if (!of_data)
 116                 return;
 117
 118         node = of_get_child_by_name(dev->of_node, "rcar_sound,mix");
 119         if (!node)
 120                 return;
 121
 122         nr = of_get_child_count(node);
 123         if (!nr)
 124                 goto rsnd_of_parse_mix_end;
 125
 126         mix_info = devm_kzalloc(dev,
 127                                 sizeof(struct rsnd_mix_platform_info) * nr,
 128                                 GFP_KERNEL);
 129         if (!mix_info) {
 130                 dev_err(dev, "mix info allocation error\n");
 131                 goto rsnd_of_parse_mix_end;
 132         }
 133
 134         info->mix_info          = mix_info;
 135         info->mix_info_nr       = nr;
 136
 137 rsnd_of_parse_mix_end:
 138         of_node_put(node);
 139
 140 }
 141
 142 int rsnd_mix_probe(struct platform_device *pdev,
 143                    const struct rsnd_of_data *of_data,
 144                    struct rsnd_priv *priv)
 145 {
 146         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 147         struct device *dev = rsnd_priv_to_dev(priv);
 148         struct rsnd_mix *mix;
 149         struct clk *clk;
 150         char name[MIX_NAME_SIZE];
 151         int i, nr, ret;
 152
 153         /* This driver doesn't support Gen1 at this point */
 154         if (rsnd_is_gen1(priv)) {
 155                 dev_warn(dev, "MIX is not supported on Gen1\n");
 156                 return -EINVAL;
 157         }
 158
 159         rsnd_of_parse_mix(pdev, of_data, priv);
 160
 161         nr = info->mix_info_nr;
 162         if (!nr)
 163                 return 0;
 164
 165         mix     = devm_kzalloc(dev, sizeof(*mix) * nr, GFP_KERNEL);
 166         if (!mix)
 167                 return -ENOMEM;
 168
 169         priv->mix_nr    = nr;
 170         priv->mix       = mix;
 171
 172         for_each_rsnd_mix(mix, priv, i) {
 173                 snprintf(name, MIX_NAME_SIZE, "%s.%d",
 174                          MIX_NAME, i);
 175
 176                 clk = devm_clk_get(dev, name);
 177                 if (IS_ERR(clk))
 178                         return PTR_ERR(clk);
 179
 180                 mix->info = &info->mix_info[i];
 181
 182                 ret = rsnd_mod_init(priv, &mix->mod, &rsnd_mix_ops,
 183                                     clk, RSND_MOD_MIX, i);
 184                 if (ret)
 185                         return ret;
 186         }
 187
 188         return 0;
 189 }
 190
 191 void rsnd_mix_remove(struct platform_device *pdev,
 192                      struct rsnd_priv *priv)
 193 {
 194         struct rsnd_mix *mix;
 195         int i;
 196
 197         for_each_rsnd_mix(mix, priv, i) {
 198                 rsnd_mod_quit(&mix->mod);
 199         }
 200 }