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/*
* Renesas R-Car SSIU support
*
* 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 SSIU_NAME "ssiu"
struct rsnd_ssiu {
struct rsnd_mod mod;
};
#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
#define for_each_rsnd_ssiu(pos, priv, i) \
for (i = 0; \
(i < rsnd_ssiu_nr(priv)) && \
((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \
i++)
static int rsnd_ssiu_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
u32 multi_ssi_slaves = rsnd_ssi_multi_slaves(io);
int use_busif = rsnd_ssi_use_busif(io);
int id = rsnd_mod_id(mod);
u32 mask1, val1;
u32 mask2, val2;
/*
* SSI_MODE0
*/
rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);
/*
* SSI_MODE1
*/
mask1 = (1 << 4) | (1 << 20); /* mask sync bit */
mask2 = (1 << 4); /* mask sync bit */
val1 = val2 = 0;
if (rsnd_ssi_is_pin_sharing(io)) {
int shift = -1;
switch (id) {
case 1:
shift = 0;
break;
case 2:
shift = 2;
break;
case 4:
shift = 16;
break;
default:
return -EINVAL;
}
mask1 |= 0x3 << shift;
val1 = rsnd_rdai_is_clk_master(rdai) ?
0x2 << shift : 0x1 << shift;
} else if (multi_ssi_slaves) {
mask2 |= 0x00000007;
mask1 |= 0x0000000f;
switch (multi_ssi_slaves) {
case 0x0206: /* SSI0/1/2/9 */
val2 = (1 << 4) | /* SSI0129 sync */
rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1;
/* fall through */
case 0x0006: /* SSI0/1/2 */
val1 = rsnd_rdai_is_clk_master(rdai) ?
0xa : 0x5;
if (!val2) /* SSI012 sync */
val1 |= (1 << 4);
}
}
rsnd_mod_bset(mod, SSI_MODE1, mask1, val1);
rsnd_mod_bset(mod, SSI_MODE2, mask2, val2);
return 0;
}
static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
.name = SSIU_NAME,
.init = rsnd_ssiu_init,
};
static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
int ret;
ret = rsnd_ssiu_init(mod, io, priv);
if (ret < 0)
return ret;
if (rsnd_get_slot_width(io) >= 6) {
/*
* TDM Extend Mode
* see
* rsnd_ssi_config_init()
*/
rsnd_mod_write(mod, SSI_MODE, 0x1);
}
if (rsnd_ssi_use_busif(io)) {
u32 val = rsnd_get_dalign(mod, io);
rsnd_mod_write(mod, SSI_BUSIF_ADINR,
rsnd_get_adinr_bit(mod, io) |
rsnd_get_adinr_chan(mod, io));
rsnd_mod_write(mod, SSI_BUSIF_MODE, 1);
rsnd_mod_write(mod, SSI_BUSIF_DALIGN, val);
}
return 0;
}
static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
if (!rsnd_ssi_use_busif(io))
return 0;
rsnd_mod_write(mod, SSI_CTRL, 0x1);
if (rsnd_ssi_multi_slaves(io))
rsnd_mod_write(mod, SSI_CONTROL, 0x1);
return 0;
}
static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
if (!rsnd_ssi_use_busif(io))
return 0;
rsnd_mod_write(mod, SSI_CTRL, 0);
if (rsnd_ssi_multi_slaves(io))
rsnd_mod_write(mod, SSI_CONTROL, 0);
return 0;
}
static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
.name = SSIU_NAME,
.init = rsnd_ssiu_init_gen2,
.start = rsnd_ssiu_start_gen2,
.stop = rsnd_ssiu_stop_gen2,
};
static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
id = 0;
return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
}
int rsnd_ssiu_attach(struct rsnd_dai_stream *io,
struct rsnd_mod *ssi_mod)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod));
rsnd_mod_confirm_ssi(ssi_mod);
return rsnd_dai_connect(mod, io, mod->type);
}
int rsnd_ssiu_probe(struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssiu *ssiu;
static struct rsnd_mod_ops *ops;
int i, nr, ret;
/* same number to SSI */
nr = priv->ssi_nr;
ssiu = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL);
if (!ssiu)
return -ENOMEM;
priv->ssiu = ssiu;
priv->ssiu_nr = nr;
if (rsnd_is_gen1(priv))
ops = &rsnd_ssiu_ops_gen1;
else
ops = &rsnd_ssiu_ops_gen2;
for_each_rsnd_ssiu(ssiu, priv, i) {
ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
ops, NULL, RSND_MOD_SSIU, i);
if (ret)
return ret;
}
return 0;
}
void rsnd_ssiu_remove(struct rsnd_priv *priv)
{
struct rsnd_ssiu *ssiu;
int i;
for_each_rsnd_ssiu(ssiu, priv, i) {
rsnd_mod_quit(rsnd_mod_get(ssiu));
}
}
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