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/*
* Renesas R-Car DVC support
*
* Copyright (C) 2014 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"
#define RSND_DVC_NAME_SIZE 16
#define DVC_NAME "dvc"
struct rsnd_dvc {
struct rsnd_mod mod;
struct rsnd_kctrl_cfg_m volume;
struct rsnd_kctrl_cfg_m mute;
struct rsnd_kctrl_cfg_s ren; /* Ramp Enable */
struct rsnd_kctrl_cfg_s rup; /* Ramp Rate Up */
struct rsnd_kctrl_cfg_s rdown; /* Ramp Rate Down */
};
#define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id)
#define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
#define rsnd_dvc_of_node(priv) \
of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,dvc")
#define rsnd_mod_to_dvc(_mod) \
container_of((_mod), struct rsnd_dvc, mod)
#define for_each_rsnd_dvc(pos, priv, i) \
for ((i) = 0; \
((i) < rsnd_dvc_nr(priv)) && \
((pos) = (struct rsnd_dvc *)(priv)->dvc + i); \
i++)
static const char * const dvc_ramp_rate[] = {
"128 dB/1 step", /* 00000 */
"64 dB/1 step", /* 00001 */
"32 dB/1 step", /* 00010 */
"16 dB/1 step", /* 00011 */
"8 dB/1 step", /* 00100 */
"4 dB/1 step", /* 00101 */
"2 dB/1 step", /* 00110 */
"1 dB/1 step", /* 00111 */
"0.5 dB/1 step", /* 01000 */
"0.25 dB/1 step", /* 01001 */
"0.125 dB/1 step", /* 01010 */
"0.125 dB/2 steps", /* 01011 */
"0.125 dB/4 steps", /* 01100 */
"0.125 dB/8 steps", /* 01101 */
"0.125 dB/16 steps", /* 01110 */
"0.125 dB/32 steps", /* 01111 */
"0.125 dB/64 steps", /* 10000 */
"0.125 dB/128 steps", /* 10001 */
"0.125 dB/256 steps", /* 10010 */
"0.125 dB/512 steps", /* 10011 */
"0.125 dB/1024 steps", /* 10100 */
"0.125 dB/2048 steps", /* 10101 */
"0.125 dB/4096 steps", /* 10110 */
"0.125 dB/8192 steps", /* 10111 */
};
static void rsnd_dvc_activation(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, DVC_SWRSR, 0);
rsnd_mod_write(mod, DVC_SWRSR, 1);
}
static void rsnd_dvc_halt(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, DVC_DVUIR, 1);
rsnd_mod_write(mod, DVC_SWRSR, 0);
}
#define rsnd_dvc_get_vrpdr(dvc) (dvc->rup.val << 8 | dvc->rdown.val)
#define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (dvc->volume.val[0] >> 13))
static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
u32 val[RSND_DVC_CHANNELS];
int i;
/* Enable Ramp */
if (dvc->ren.val)
for (i = 0; i < RSND_DVC_CHANNELS; i++)
val[i] = dvc->volume.cfg.max;
else
for (i = 0; i < RSND_DVC_CHANNELS; i++)
val[i] = dvc->volume.val[i];
/* Enable Digital Volume */
rsnd_mod_write(mod, DVC_VOL0R, val[0]);
rsnd_mod_write(mod, DVC_VOL1R, val[1]);
rsnd_mod_write(mod, DVC_VOL2R, val[2]);
rsnd_mod_write(mod, DVC_VOL3R, val[3]);
rsnd_mod_write(mod, DVC_VOL4R, val[4]);
rsnd_mod_write(mod, DVC_VOL5R, val[5]);
rsnd_mod_write(mod, DVC_VOL6R, val[6]);
rsnd_mod_write(mod, DVC_VOL7R, val[7]);
}
static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
u32 adinr = 0;
u32 dvucr = 0;
u32 vrctr = 0;
u32 vrpdr = 0;
u32 vrdbr = 0;
adinr = rsnd_get_adinr_bit(mod, io) |
rsnd_get_adinr_chan(mod, io);
/* Enable Digital Volume, Zero Cross Mute Mode */
dvucr |= 0x101;
/* Enable Ramp */
if (dvc->ren.val) {
dvucr |= 0x10;
/*
* FIXME !!
* use scale-downed Digital Volume
* as Volume Ramp
* 7F FFFF -> 3FF
*/
vrctr = 0xff;
vrpdr = rsnd_dvc_get_vrpdr(dvc);
vrdbr = rsnd_dvc_get_vrdbr(dvc);
}
/* Initialize operation */
rsnd_mod_write(mod, DVC_DVUIR, 1);
/* General Information */
rsnd_mod_write(mod, DVC_ADINR, adinr);
rsnd_mod_write(mod, DVC_DVUCR, dvucr);
/* Volume Ramp Parameter */
rsnd_mod_write(mod, DVC_VRCTR, vrctr);
rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
/* Digital Volume Function Parameter */
rsnd_dvc_volume_parameter(io, mod);
/* cancel operation */
rsnd_mod_write(mod, DVC_DVUIR, 0);
}
static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
u32 zcmcr = 0;
u32 vrpdr = 0;
u32 vrdbr = 0;
int i;
for (i = 0; i < dvc->mute.cfg.size; i++)
zcmcr |= (!!dvc->mute.cfg.val[i]) << i;
if (dvc->ren.val) {
vrpdr = rsnd_dvc_get_vrpdr(dvc);
vrdbr = rsnd_dvc_get_vrdbr(dvc);
}
/* Disable DVC Register access */
rsnd_mod_write(mod, DVC_DVUER, 0);
/* Zero Cross Mute Function */
rsnd_mod_write(mod, DVC_ZCMCR, zcmcr);
/* Volume Ramp Function */
rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
/* add DVC_VRWTR here */
/* Digital Volume Function Parameter */
rsnd_dvc_volume_parameter(io, mod);
/* Enable DVC Register access */
rsnd_mod_write(mod, DVC_DVUER, 1);
}
static int rsnd_dvc_probe_(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
return rsnd_cmd_attach(io, rsnd_mod_id(mod));
}
static int rsnd_dvc_remove_(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
rsnd_kctrl_remove(dvc->volume);
rsnd_kctrl_remove(dvc->mute);
rsnd_kctrl_remove(dvc->ren);
rsnd_kctrl_remove(dvc->rup);
rsnd_kctrl_remove(dvc->rdown);
return 0;
}
static int rsnd_dvc_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_mod_power_on(mod);
rsnd_dvc_activation(mod);
rsnd_dvc_volume_init(io, mod);
rsnd_dvc_volume_update(io, mod);
return 0;
}
static int rsnd_dvc_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_dvc_halt(mod);
rsnd_mod_power_off(mod);
return 0;
}
static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct snd_soc_pcm_runtime *rtd)
{
struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
int is_play = rsnd_io_is_play(io);
int slots = rsnd_get_slot(io);
int ret;
/* Volume */
ret = rsnd_kctrl_new_m(mod, io, rtd,
is_play ?
"DVC Out Playback Volume" : "DVC In Capture Volume",
rsnd_dvc_volume_update,
&dvc->volume, slots,
0x00800000 - 1);
if (ret < 0)
return ret;
/* Mute */
ret = rsnd_kctrl_new_m(mod, io, rtd,
is_play ?
"DVC Out Mute Switch" : "DVC In Mute Switch",
rsnd_dvc_volume_update,
&dvc->mute, slots,
1);
if (ret < 0)
return ret;
/* Ramp */
ret = rsnd_kctrl_new_s(mod, io, rtd,
is_play ?
"DVC Out Ramp Switch" : "DVC In Ramp Switch",
rsnd_dvc_volume_update,
&dvc->ren, 1);
if (ret < 0)
return ret;
ret = rsnd_kctrl_new_e(mod, io, rtd,
is_play ?
"DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
&dvc->rup,
rsnd_dvc_volume_update,
dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
if (ret < 0)
return ret;
ret = rsnd_kctrl_new_e(mod, io, rtd,
is_play ?
"DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
&dvc->rdown,
rsnd_dvc_volume_update,
dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
if (ret < 0)
return ret;
return 0;
}
static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
mod, "tx");
}
static struct rsnd_mod_ops rsnd_dvc_ops = {
.name = DVC_NAME,
.dma_req = rsnd_dvc_dma_req,
.probe = rsnd_dvc_probe_,
.remove = rsnd_dvc_remove_,
.init = rsnd_dvc_init,
.quit = rsnd_dvc_quit,
.pcm_new = rsnd_dvc_pcm_new,
};
struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
id = 0;
return rsnd_mod_get(rsnd_dvc_get(priv, id));
}
int rsnd_dvc_probe(struct rsnd_priv *priv)
{
struct device_node *node;
struct device_node *np;
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_dvc *dvc;
struct clk *clk;
char name[RSND_DVC_NAME_SIZE];
int i, nr, ret;
/* This driver doesn't support Gen1 at this point */
if (rsnd_is_gen1(priv))
return 0;
node = rsnd_dvc_of_node(priv);
if (!node)
return 0; /* not used is not error */
nr = of_get_child_count(node);
if (!nr) {
ret = -EINVAL;
goto rsnd_dvc_probe_done;
}
dvc = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
if (!dvc) {
ret = -ENOMEM;
goto rsnd_dvc_probe_done;
}
priv->dvc_nr = nr;
priv->dvc = dvc;
i = 0;
ret = 0;
for_each_child_of_node(node, np) {
dvc = rsnd_dvc_get(priv, i);
snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
DVC_NAME, i);
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto rsnd_dvc_probe_done;
}
ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
clk, RSND_MOD_DVC, i);
if (ret)
goto rsnd_dvc_probe_done;
i++;
}
rsnd_dvc_probe_done:
of_node_put(node);
return ret;
}
void rsnd_dvc_remove(struct rsnd_priv *priv)
{
struct rsnd_dvc *dvc;
int i;
for_each_rsnd_dvc(dvc, priv, i) {
rsnd_mod_quit(rsnd_mod_get(dvc));
}
}