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/*
* ctu.c
*
* Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "rsnd.h"
#define CTU_NAME_SIZE 16
#define CTU_NAME "ctu"
struct rsnd_ctu {
struct rsnd_mod mod;
int channels;
};
#define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
#define for_each_rsnd_ctu(pos, priv, i) \
for ((i) = 0; \
((i) < rsnd_ctu_nr(priv)) && \
((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
i++)
#define rsnd_mod_to_ctu(_mod) \
container_of((_mod), struct rsnd_ctu, mod)
#define rsnd_ctu_get(priv, id) ((struct rsnd_ctu *)(priv->ctu) + id)
static void rsnd_ctu_activation(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, CTU_SWRSR, 0);
rsnd_mod_write(mod, CTU_SWRSR, 1);
}
static void rsnd_ctu_halt(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, CTU_CTUIR, 1);
rsnd_mod_write(mod, CTU_SWRSR, 0);
}
int rsnd_ctu_converted_channel(struct rsnd_mod *mod)
{
struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
return ctu->channels;
}
static int rsnd_ctu_probe_(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
return rsnd_cmd_attach(io, rsnd_mod_id(mod) / 4);
}
static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
rsnd_mod_write(mod, CTU_CTUIR, 1);
rsnd_mod_write(mod, CTU_ADINR, rsnd_runtime_channel_original(io));
rsnd_mod_write(mod, CTU_CPMDR, 0);
rsnd_mod_write(mod, CTU_SCMDR, 0);
rsnd_mod_write(mod, CTU_SV00R, 0);
rsnd_mod_write(mod, CTU_SV01R, 0);
rsnd_mod_write(mod, CTU_SV02R, 0);
rsnd_mod_write(mod, CTU_SV03R, 0);
rsnd_mod_write(mod, CTU_SV04R, 0);
rsnd_mod_write(mod, CTU_SV05R, 0);
rsnd_mod_write(mod, CTU_SV06R, 0);
rsnd_mod_write(mod, CTU_SV07R, 0);
rsnd_mod_write(mod, CTU_SV10R, 0);
rsnd_mod_write(mod, CTU_SV11R, 0);
rsnd_mod_write(mod, CTU_SV12R, 0);
rsnd_mod_write(mod, CTU_SV13R, 0);
rsnd_mod_write(mod, CTU_SV14R, 0);
rsnd_mod_write(mod, CTU_SV15R, 0);
rsnd_mod_write(mod, CTU_SV16R, 0);
rsnd_mod_write(mod, CTU_SV17R, 0);
rsnd_mod_write(mod, CTU_SV20R, 0);
rsnd_mod_write(mod, CTU_SV21R, 0);
rsnd_mod_write(mod, CTU_SV22R, 0);
rsnd_mod_write(mod, CTU_SV23R, 0);
rsnd_mod_write(mod, CTU_SV24R, 0);
rsnd_mod_write(mod, CTU_SV25R, 0);
rsnd_mod_write(mod, CTU_SV26R, 0);
rsnd_mod_write(mod, CTU_SV27R, 0);
rsnd_mod_write(mod, CTU_SV30R, 0);
rsnd_mod_write(mod, CTU_SV31R, 0);
rsnd_mod_write(mod, CTU_SV32R, 0);
rsnd_mod_write(mod, CTU_SV33R, 0);
rsnd_mod_write(mod, CTU_SV34R, 0);
rsnd_mod_write(mod, CTU_SV35R, 0);
rsnd_mod_write(mod, CTU_SV36R, 0);
rsnd_mod_write(mod, CTU_SV37R, 0);
rsnd_mod_write(mod, CTU_CTUIR, 0);
}
static int rsnd_ctu_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_mod_power_on(mod);
rsnd_ctu_activation(mod);
rsnd_ctu_value_init(io, mod);
return 0;
}
static int rsnd_ctu_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_ctu_halt(mod);
rsnd_mod_power_off(mod);
return 0;
}
static int rsnd_ctu_hw_params(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *fe_params)
{
struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
struct snd_soc_pcm_runtime *fe = substream->private_data;
/*
* CTU assumes that it is used under DPCM if user want to use
* channel transfer. Then, CTU should be FE.
* And then, this function will be called *after* BE settings.
* this means, each BE already has fixuped hw_params.
* see
* dpcm_fe_dai_hw_params()
* dpcm_be_dai_hw_params()
*/
ctu->channels = 0;
if (fe->dai_link->dynamic) {
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
struct snd_soc_dpcm *dpcm;
struct snd_pcm_hw_params *be_params;
int stream = substream->stream;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
be_params = &dpcm->hw_params;
if (params_channels(fe_params) != params_channels(be_params))
ctu->channels = params_channels(be_params);
}
dev_dbg(dev, "CTU convert channels %d\n", ctu->channels);
}
return 0;
}
static struct rsnd_mod_ops rsnd_ctu_ops = {
.name = CTU_NAME,
.probe = rsnd_ctu_probe_,
.init = rsnd_ctu_init,
.quit = rsnd_ctu_quit,
.hw_params = rsnd_ctu_hw_params,
};
struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
id = 0;
return rsnd_mod_get(rsnd_ctu_get(priv, id));
}
int rsnd_ctu_probe(struct rsnd_priv *priv)
{
struct device_node *node;
struct device_node *np;
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ctu *ctu;
struct clk *clk;
char name[CTU_NAME_SIZE];
int i, nr, ret;
/* This driver doesn't support Gen1 at this point */
if (rsnd_is_gen1(priv))
return 0;
node = rsnd_ctu_of_node(priv);
if (!node)
return 0; /* not used is not error */
nr = of_get_child_count(node);
if (!nr) {
ret = -EINVAL;
goto rsnd_ctu_probe_done;
}
ctu = devm_kzalloc(dev, sizeof(*ctu) * nr, GFP_KERNEL);
if (!ctu) {
ret = -ENOMEM;
goto rsnd_ctu_probe_done;
}
priv->ctu_nr = nr;
priv->ctu = ctu;
i = 0;
ret = 0;
for_each_child_of_node(node, np) {
ctu = rsnd_ctu_get(priv, i);
/*
* CTU00, CTU01, CTU02, CTU03 => CTU0
* CTU10, CTU11, CTU12, CTU13 => CTU1
*/
snprintf(name, CTU_NAME_SIZE, "%s.%d",
CTU_NAME, i / 4);
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto rsnd_ctu_probe_done;
}
ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
clk, rsnd_mod_get_status, RSND_MOD_CTU, i);
if (ret)
goto rsnd_ctu_probe_done;
i++;
}
rsnd_ctu_probe_done:
of_node_put(node);
return ret;
}
void rsnd_ctu_remove(struct rsnd_priv *priv)
{
struct rsnd_ctu *ctu;
int i;
for_each_rsnd_ctu(ctu, priv, i) {
rsnd_mod_quit(rsnd_mod_get(ctu));
}
}