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/*
* Renesas R-Car SCU support
*
* Copyright (C) 2013 Renesas Solutions Corp.
* 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"
struct rsnd_scu {
struct rsnd_scu_platform_info *info; /* rcar_snd.h */
struct rsnd_mod mod;
};
#define rsnd_scu_mode_flags(p) ((p)->info->flags)
/*
* ADINR
*/
#define OTBL_24 (0 << 16)
#define OTBL_22 (2 << 16)
#define OTBL_20 (4 << 16)
#define OTBL_18 (6 << 16)
#define OTBL_16 (8 << 16)
#define rsnd_mod_to_scu(_mod) \
container_of((_mod), struct rsnd_scu, mod)
#define for_each_rsnd_scu(pos, priv, i) \
for ((i) = 0; \
((i) < rsnd_scu_nr(priv)) && \
((pos) = (struct rsnd_scu *)(priv)->scu + i); \
i++)
static int rsnd_scu_set_route(struct rsnd_priv *priv,
struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct scu_route_config {
u32 mask;
int shift;
} routes[] = {
{ 0xF, 0, }, /* 0 */
{ 0xF, 4, }, /* 1 */
{ 0xF, 8, }, /* 2 */
{ 0x7, 12, }, /* 3 */
{ 0x7, 16, }, /* 4 */
{ 0x7, 20, }, /* 5 */
{ 0x7, 24, }, /* 6 */
{ 0x3, 28, }, /* 7 */
{ 0x3, 30, }, /* 8 */
};
u32 mask;
u32 val;
int shift;
int id;
/*
* Gen1 only
*/
if (!rsnd_is_gen1(priv))
return 0;
id = rsnd_mod_id(mod);
if (id < 0 || id > ARRAY_SIZE(routes))
return -EIO;
/*
* SRC_ROUTE_SELECT
*/
val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
val = val << routes[id].shift;
mask = routes[id].mask << routes[id].shift;
rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
/*
* SRC_TIMING_SELECT
*/
shift = (id % 4) * 8;
mask = 0x1F << shift;
if (8 == id) /* SRU8 is very special */
val = id << shift;
else
val = (id + 1) << shift;
switch (id / 4) {
case 0:
rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
break;
case 1:
rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
break;
case 2:
rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
break;
}
return 0;
}
static int rsnd_scu_set_mode(struct rsnd_priv *priv,
struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
int id = rsnd_mod_id(mod);
u32 val;
if (rsnd_is_gen1(priv)) {
val = (1 << id);
rsnd_mod_bset(mod, SRC_CTRL, val, val);
}
return 0;
}
static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 adinr = runtime->channels;
switch (runtime->sample_bits) {
case 16:
adinr |= OTBL_16;
break;
case 32:
adinr |= OTBL_24;
break;
default:
return -EIO;
}
rsnd_mod_write(mod, BUSIF_MODE, 1);
rsnd_mod_write(mod, BUSIF_ADINR, adinr);
return 0;
}
bool rsnd_scu_hpbif_is_enable(struct rsnd_mod *mod)
{
struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
u32 flags = rsnd_scu_mode_flags(scu);
return !!(flags & RSND_SCU_USE_HPBIF);
}
static int rsnd_scu_start(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int ret;
/*
* SCU will be used if it has RSND_SCU_USE_HPBIF flags
*/
if (!rsnd_scu_hpbif_is_enable(mod)) {
/* it use PIO transter */
dev_dbg(dev, "%s%d is not used\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return 0;
}
/* it use DMA transter */
ret = rsnd_scu_set_route(priv, mod, rdai, io);
if (ret < 0)
return ret;
ret = rsnd_scu_set_mode(priv, mod, rdai, io);
if (ret < 0)
return ret;
ret = rsnd_scu_set_hpbif(priv, mod, rdai, io);
if (ret < 0)
return ret;
dev_dbg(dev, "%s%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
return 0;
}
static struct rsnd_mod_ops rsnd_scu_ops = {
.name = "scu",
.start = rsnd_scu_start,
};
struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id)
{
BUG_ON(id < 0 || id >= rsnd_scu_nr(priv));
return &((struct rsnd_scu *)(priv->scu) + id)->mod;
}
int rsnd_scu_probe(struct platform_device *pdev,
struct rcar_snd_info *info,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_scu *scu;
int i, nr;
/*
* init SCU
*/
nr = info->scu_info_nr;
scu = devm_kzalloc(dev, sizeof(*scu) * nr, GFP_KERNEL);
if (!scu) {
dev_err(dev, "SCU allocate failed\n");
return -ENOMEM;
}
priv->scu_nr = nr;
priv->scu = scu;
for_each_rsnd_scu(scu, priv, i) {
rsnd_mod_init(priv, &scu->mod,
&rsnd_scu_ops, i);
scu->info = &info->scu_info[i];
dev_dbg(dev, "SCU%d probed\n", i);
}
dev_dbg(dev, "scu probed\n");
return 0;
}
void rsnd_scu_remove(struct platform_device *pdev,
struct rsnd_priv *priv)
{
}
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