- 根目录:
- sound
- soc
- sh
- rcar
- dvc.c
/*
* 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_dvc_platform_info *info; /* rcar_snd.h */
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_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_soft_reset(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, DVC_SWRSR, 0);
rsnd_mod_write(mod, DVC_SWRSR, 1);
}
#define rsnd_dvc_initialize_lock(mod) __rsnd_dvc_initialize_lock(mod, 1)
#define rsnd_dvc_initialize_unlock(mod) __rsnd_dvc_initialize_lock(mod, 0)
static void __rsnd_dvc_initialize_lock(struct rsnd_mod *mod, u32 enable)
{
rsnd_mod_write(mod, DVC_DVUIR, enable);
}
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 val[RSND_DVC_CHANNELS];
u32 dvucr = 0;
u32 mute = 0;
int i;
for (i = 0; i < dvc->mute.cfg.size; i++)
mute |= (!!dvc->mute.cfg.val[i]) << i;
/* Disable DVC Register access */
rsnd_mod_write(mod, DVC_DVUER, 0);
/* Enable Ramp */
if (dvc->ren.val) {
dvucr |= 0x10;
/* Digital Volume Max */
for (i = 0; i < RSND_DVC_CHANNELS; i++)
val[i] = dvc->volume.cfg.max;
rsnd_mod_write(mod, DVC_VRCTR, 0xff);
rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 |
dvc->rdown.val);
/*
* FIXME !!
* use scale-downed Digital Volume
* as Volume Ramp
* 7F FFFF -> 3FF
*/
rsnd_mod_write(mod, DVC_VRDBR,
0x3ff - (dvc->volume.val[0] >> 13));
} else {
for (i = 0; i < RSND_DVC_CHANNELS; i++)
val[i] = dvc->volume.val[i];
}
/* Enable Digital Volume */
dvucr |= 0x100;
rsnd_mod_write(mod, DVC_VOL0R, val[0]);
rsnd_mod_write(mod, DVC_VOL1R, val[1]);
/* Enable Mute */
if (mute) {
dvucr |= 0x1;
rsnd_mod_write(mod, DVC_ZCMCR, mute);
}
rsnd_mod_write(mod, DVC_DVUCR, dvucr);
/* Enable DVC Register access */
rsnd_mod_write(mod, DVC_DVUER, 1);
}
static int rsnd_dvc_remove_gen2(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_soft_reset(mod);
rsnd_dvc_initialize_lock(mod);
rsnd_path_parse(priv, io);
rsnd_mod_write(mod, DVC_ADINR, rsnd_get_adinr_bit(mod, io));
/* ch0/ch1 Volume */
rsnd_dvc_volume_update(io, mod);
rsnd_adg_set_cmd_timsel_gen2(mod, io);
return 0;
}
static int rsnd_dvc_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_mod_power_off(mod);
return 0;
}
static int rsnd_dvc_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_dvc_initialize_unlock(mod);
rsnd_mod_write(mod, CMD_CTRL, 0x10);
return 0;
}
static int rsnd_dvc_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
rsnd_mod_write(mod, CMD_CTRL, 0);
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 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, 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, 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,
.remove = rsnd_dvc_remove_gen2,
.init = rsnd_dvc_init,
.quit = rsnd_dvc_quit,
.start = rsnd_dvc_start,
.stop = rsnd_dvc_stop,
.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((struct rsnd_dvc *)(priv->dvc) + id);
}
static void rsnd_of_parse_dvc(struct platform_device *pdev,
const struct rsnd_of_data *of_data,
struct rsnd_priv *priv)
{
struct device_node *node;
struct rsnd_dvc_platform_info *dvc_info;
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
struct device *dev = &pdev->dev;
int nr;
if (!of_data)
return;
node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
if (!node)
return;
nr = of_get_child_count(node);
if (!nr)
goto rsnd_of_parse_dvc_end;
dvc_info = devm_kzalloc(dev,
sizeof(struct rsnd_dvc_platform_info) * nr,
GFP_KERNEL);
if (!dvc_info) {
dev_err(dev, "dvc info allocation error\n");
goto rsnd_of_parse_dvc_end;
}
info->dvc_info = dvc_info;
info->dvc_info_nr = nr;
rsnd_of_parse_dvc_end:
of_node_put(node);
}
int rsnd_dvc_probe(struct platform_device *pdev,
const struct rsnd_of_data *of_data,
struct rsnd_priv *priv)
{
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
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;
rsnd_of_parse_dvc(pdev, of_data, priv);
nr = info->dvc_info_nr;
if (!nr)
return 0;
dvc = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
if (!dvc)
return -ENOMEM;
priv->dvc_nr = nr;
priv->dvc = dvc;
for_each_rsnd_dvc(dvc, priv, i) {
snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
DVC_NAME, i);
clk = devm_clk_get(dev, name);
if (IS_ERR(clk))
return PTR_ERR(clk);
dvc->info = &info->dvc_info[i];
ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
clk, RSND_MOD_DVC, i);
if (ret)
return ret;
}
return 0;
}
void rsnd_dvc_remove(struct platform_device *pdev,
struct rsnd_priv *priv)
{
struct rsnd_dvc *dvc;
int i;
for_each_rsnd_dvc(dvc, priv, i) {
rsnd_mod_quit(rsnd_mod_get(dvc));
}
}