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linux/sound/soc/meson/axg-tdmin.c
Pierre-Louis Bossart 84d0493f67
ASoC: meson: axg-tdmin: remove useless assignment 
cppcheck complains about potential null pointer dereference but it's
rather an unnecessary assignment to NULL before walking through a
list.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210326215927.936377-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-03-31 18:03:17 +01:00

261 lines
7.5 KiB
C
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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
//
// Copyright (c) 2018 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "axg-tdm-formatter.h"
#define TDMIN_CTRL 0x00
#define TDMIN_CTRL_ENABLE BIT(31)
#define TDMIN_CTRL_I2S_MODE BIT(30)
#define TDMIN_CTRL_RST_OUT BIT(29)
#define TDMIN_CTRL_RST_IN BIT(28)
#define TDMIN_CTRL_WS_INV BIT(25)
#define TDMIN_CTRL_SEL_SHIFT 20
#define TDMIN_CTRL_IN_BIT_SKEW_MASK GENMASK(18, 16)
#define TDMIN_CTRL_IN_BIT_SKEW(x) ((x) << 16)
#define TDMIN_CTRL_LSB_FIRST BIT(5)
#define TDMIN_CTRL_BITNUM_MASK GENMASK(4, 0)
#define TDMIN_CTRL_BITNUM(x) ((x) << 0)
#define TDMIN_SWAP 0x04
#define TDMIN_MASK0 0x08
#define TDMIN_MASK1 0x0c
#define TDMIN_MASK2 0x10
#define TDMIN_MASK3 0x14
#define TDMIN_STAT 0x18
#define TDMIN_MUTE_VAL 0x1c
#define TDMIN_MUTE0 0x20
#define TDMIN_MUTE1 0x24
#define TDMIN_MUTE2 0x28
#define TDMIN_MUTE3 0x2c
static const struct regmap_config axg_tdmin_regmap_cfg = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = TDMIN_MUTE3,
};
static const char * const axg_tdmin_sel_texts[] = {
"IN 0", "IN 1", "IN 2", "IN 3", "IN 4", "IN 5", "IN 6", "IN 7",
"IN 8", "IN 9", "IN 10", "IN 11", "IN 12", "IN 13", "IN 14", "IN 15",
};
/* Change to special mux control to reset dapm */
static SOC_ENUM_SINGLE_DECL(axg_tdmin_sel_enum, TDMIN_CTRL,
TDMIN_CTRL_SEL_SHIFT, axg_tdmin_sel_texts);
static const struct snd_kcontrol_new axg_tdmin_in_mux =
SOC_DAPM_ENUM("Input Source", axg_tdmin_sel_enum);
static struct snd_soc_dai *
axg_tdmin_get_be(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_path *p;
struct snd_soc_dai *be;
snd_soc_dapm_widget_for_each_source_path(w, p) {
if (!p->connect)
continue;
if (p->source->id == snd_soc_dapm_dai_out)
return (struct snd_soc_dai *)p->source->priv;
be = axg_tdmin_get_be(p->source);
if (be)
return be;
}
return NULL;
}
static struct axg_tdm_stream *
axg_tdmin_get_tdm_stream(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dai *be = axg_tdmin_get_be(w);
if (!be)
return NULL;
return be->capture_dma_data;
}
static void axg_tdmin_enable(struct regmap *map)
{
/* Apply both reset */
regmap_update_bits(map, TDMIN_CTRL,
TDMIN_CTRL_RST_OUT | TDMIN_CTRL_RST_IN, 0);
/* Clear out reset before in reset */
regmap_update_bits(map, TDMIN_CTRL,
TDMIN_CTRL_RST_OUT, TDMIN_CTRL_RST_OUT);
regmap_update_bits(map, TDMIN_CTRL,
TDMIN_CTRL_RST_IN, TDMIN_CTRL_RST_IN);
/* Actually enable tdmin */
regmap_update_bits(map, TDMIN_CTRL,
TDMIN_CTRL_ENABLE, TDMIN_CTRL_ENABLE);
}
static void axg_tdmin_disable(struct regmap *map)
{
regmap_update_bits(map, TDMIN_CTRL, TDMIN_CTRL_ENABLE, 0);
}
static int axg_tdmin_prepare(struct regmap *map,
const struct axg_tdm_formatter_hw *quirks,
struct axg_tdm_stream *ts)
{
unsigned int val, skew = quirks->skew_offset;
/* Set stream skew */
switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_DSP_A:
skew += 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_DSP_B:
break;
default:
pr_err("Unsupported format: %u\n",
ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK);
return -EINVAL;
}
val = TDMIN_CTRL_IN_BIT_SKEW(skew);
/* Set stream format mode */
switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_RIGHT_J:
val |= TDMIN_CTRL_I2S_MODE;
break;
}
/* If the sample clock is inverted, invert it back for the formatter */
if (axg_tdm_lrclk_invert(ts->iface->fmt))
val |= TDMIN_CTRL_WS_INV;
/* Set the slot width */
val |= TDMIN_CTRL_BITNUM(ts->iface->slot_width - 1);
/*
* The following also reset LSB_FIRST which result in the formatter
* placing the first bit received at bit 31
*/
regmap_update_bits(map, TDMIN_CTRL,
(TDMIN_CTRL_IN_BIT_SKEW_MASK | TDMIN_CTRL_WS_INV |
TDMIN_CTRL_I2S_MODE | TDMIN_CTRL_LSB_FIRST |
TDMIN_CTRL_BITNUM_MASK), val);
/* Set static swap mask configuration */
regmap_write(map, TDMIN_SWAP, 0x76543210);
return axg_tdm_formatter_set_channel_masks(map, ts, TDMIN_MASK0);
}
static const struct snd_soc_dapm_widget axg_tdmin_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("IN 0", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 1", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 2", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 3", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 4", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 5", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 6", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 7", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 8", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 9", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 10", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 11", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 12", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 13", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 14", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("IN 15", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_tdmin_in_mux),
SND_SOC_DAPM_PGA_E("DEC", SND_SOC_NOPM, 0, 0, NULL, 0,
axg_tdm_formatter_event,
(SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD)),
SND_SOC_DAPM_AIF_OUT("OUT", NULL, 0, SND_SOC_NOPM, 0, 0),
};
static const struct snd_soc_dapm_route axg_tdmin_dapm_routes[] = {
{ "SRC SEL", "IN 0", "IN 0" },
{ "SRC SEL", "IN 1", "IN 1" },
{ "SRC SEL", "IN 2", "IN 2" },
{ "SRC SEL", "IN 3", "IN 3" },
{ "SRC SEL", "IN 4", "IN 4" },
{ "SRC SEL", "IN 5", "IN 5" },
{ "SRC SEL", "IN 6", "IN 6" },
{ "SRC SEL", "IN 7", "IN 7" },
{ "SRC SEL", "IN 8", "IN 8" },
{ "SRC SEL", "IN 9", "IN 9" },
{ "SRC SEL", "IN 10", "IN 10" },
{ "SRC SEL", "IN 11", "IN 11" },
{ "SRC SEL", "IN 12", "IN 12" },
{ "SRC SEL", "IN 13", "IN 13" },
{ "SRC SEL", "IN 14", "IN 14" },
{ "SRC SEL", "IN 15", "IN 15" },
{ "DEC", NULL, "SRC SEL" },
{ "OUT", NULL, "DEC" },
};
static const struct snd_soc_component_driver axg_tdmin_component_drv = {
.dapm_widgets = axg_tdmin_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(axg_tdmin_dapm_widgets),
.dapm_routes = axg_tdmin_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(axg_tdmin_dapm_routes),
};
static const struct axg_tdm_formatter_ops axg_tdmin_ops = {
.get_stream = axg_tdmin_get_tdm_stream,
.prepare = axg_tdmin_prepare,
.enable = axg_tdmin_enable,
.disable = axg_tdmin_disable,
};
static const struct axg_tdm_formatter_driver axg_tdmin_drv = {
.component_drv = &axg_tdmin_component_drv,
.regmap_cfg = &axg_tdmin_regmap_cfg,
.ops = &axg_tdmin_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.skew_offset = 3,
},
};
static const struct of_device_id axg_tdmin_of_match[] = {
{
.compatible = "amlogic,axg-tdmin",
.data = &axg_tdmin_drv,
}, {
.compatible = "amlogic,g12a-tdmin",
.data = &axg_tdmin_drv,
}, {
.compatible = "amlogic,sm1-tdmin",
.data = &axg_tdmin_drv,
}, {}
};
MODULE_DEVICE_TABLE(of, axg_tdmin_of_match);
static struct platform_driver axg_tdmin_pdrv = {
.probe = axg_tdm_formatter_probe,
.driver = {
.name = "axg-tdmin",
.of_match_table = axg_tdmin_of_match,
},
};
module_platform_driver(axg_tdmin_pdrv);
MODULE_DESCRIPTION("Amlogic AXG TDM input formatter driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL v2");
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