[PATCH 2/3] ASoC: meson: g12a: add internal DAC glue driver
From: Jerome Brunet
Date: Fri Feb 21 2020 - 07:23:04 EST
Add support for the internal audio DAC glue found on the Amlogic g12a
and sm1 SoC families. This allows to connect the TDM outputs of the SoC
to the internal t9015 audio DAC.
Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
---
sound/soc/meson/Kconfig | 9 ++
sound/soc/meson/Makefile | 2 +
sound/soc/meson/g12a-toacodec.c | 240 ++++++++++++++++++++++++++++++++
3 files changed, 251 insertions(+)
create mode 100644 sound/soc/meson/g12a-toacodec.c
diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
index d27e9180b453..8b6295283989 100644
--- a/sound/soc/meson/Kconfig
+++ b/sound/soc/meson/Kconfig
@@ -109,6 +109,15 @@ config SND_MESON_GX_SOUND_CARD
help
Select Y or M to add support for the GXBB/GXL SoC sound card
+config SND_MESON_G12A_TOACODEC
+ tristate "Amlogic G12A To Internal DAC Control Support"
+ select SND_MESON_CODEC_GLUE
+ select REGMAP_MMIO
+ imply SND_SOC_MESON_T9015
+ help
+ Select Y or M to add support for the internal audio DAC on the
+ g12a SoC family
+
config SND_MESON_G12A_TOHDMITX
tristate "Amlogic G12A To HDMI TX Control Support"
select REGMAP_MMIO
diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
index 3c9d48846816..e446bc980481 100644
--- a/sound/soc/meson/Makefile
+++ b/sound/soc/meson/Makefile
@@ -22,6 +22,7 @@ snd-soc-meson-axg-pdm-objs := axg-pdm.o
snd-soc-meson-card-utils-objs := meson-card-utils.o
snd-soc-meson-codec-glue-objs := meson-codec-glue.o
snd-soc-meson-gx-sound-card-objs := gx-card.o
+snd-soc-meson-g12a-toacodec-objs := g12a-toacodec.o
snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o
snd-soc-meson-t9015-objs := t9015.o
@@ -40,5 +41,6 @@ obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o
obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o
obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o
obj-$(CONFIG_SND_MESON_GX_SOUND_CARD) += snd-soc-meson-gx-sound-card.o
+obj-$(CONFIG_SND_MESON_G12A_TOACODEC) += snd-soc-meson-g12a-toacodec.o
obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o
obj-$(CONFIG_SND_SOC_MESON_T9015) += snd-soc-meson-t9015.o
diff --git a/sound/soc/meson/g12a-toacodec.c b/sound/soc/meson/g12a-toacodec.c
new file mode 100644
index 000000000000..719bbe9966b1
--- /dev/null
+++ b/sound/soc/meson/g12a-toacodec.c
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2020 BayLibre, SAS.
+// Author: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <sound/pcm_params.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include <dt-bindings/sound/meson-g12a-toacodec.h>
+#include "axg-tdm.h"
+#include "meson-codec-glue.h"
+
+#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
+
+#define TOACODEC_CTRL0 0x0
+#define CTRL0_ENABLE_SHIFT 31
+#define CTRL0_DAT_SEL GENMASK(15, 14)
+#define CTRL0_LANE_SEL 12
+#define CTRL0_LRCLK_SEL GENMASK(9, 8)
+#define CTRL0_BLK_CAP_INV BIT(7)
+#define CTRL0_BCLK_O_INV BIT(6)
+#define CTRL0_BCLK_SEL GENMASK(5, 4)
+#define CTRL0_MCLK_SEL GENMASK(2, 0)
+
+#define TOACODEC_OUT_CHMAX 2
+
+static const char * const g12a_toacodec_mux_texts[] = {
+ "I2S A", "I2S B", "I2S C",
+};
+
+static int g12a_toacodec_get_mux(struct snd_soc_component *component)
+{
+ unsigned int val;
+
+ snd_soc_component_read(component, TOACODEC_CTRL0, &val);
+ return FIELD_GET(CTRL0_DAT_SEL, val);
+}
+
+static int g12a_toacodec_put_mux(struct snd_soc_component *component,
+ unsigned int mux)
+{
+ snd_soc_component_update_bits(component, TOACODEC_CTRL0,
+ CTRL0_DAT_SEL |
+ CTRL0_LRCLK_SEL |
+ CTRL0_BCLK_SEL,
+ FIELD_PREP(CTRL0_DAT_SEL, mux) |
+ FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
+ FIELD_PREP(CTRL0_BCLK_SEL, mux));
+
+ /*
+ * FIXME:
+ * On this soc, the glue gets the MCLK directly from the clock
+ * controller instead of going the through the TDM interface.
+ *
+ * Here we assume interface A uses clock A, etc ... While it is
+ * true for now, it could be different. Instead the glue should
+ * find out the clock used by the interface and select the same
+ * source. For that, we will need regmap backed clock mux which
+ * is a work in progress
+ */
+ snd_soc_component_update_bits(component, TOACODEC_CTRL0,
+ CTRL0_MCLK_SEL,
+ FIELD_PREP(CTRL0_MCLK_SEL, mux));
+
+ return 0;
+}
+
+static MESON_CODEC_GLUE_ENUM_DECL(g12a_toacodec_mux_glue,
+ g12a_toacodec_mux_texts,
+ g12a_toacodec_get_mux,
+ g12a_toacodec_put_mux);
+
+static const struct snd_kcontrol_new g12a_toacodec_mux =
+ SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
+ snd_soc_dapm_get_enum_double,
+ g12a_toacodec_mux_put_enum);
+
+static const struct snd_kcontrol_new g12a_toacodec_out_enable =
+ SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
+ CTRL0_ENABLE_SHIFT, 1, 0);
+
+static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
+ SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
+ &g12a_toacodec_mux),
+ SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
+ &g12a_toacodec_out_enable),
+};
+
+static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct meson_codec_glue_input *data;
+ int ret;
+
+ ret = meson_codec_glue_input_hw_params(substream, params, dai);
+ if (ret)
+ return ret;
+
+ /* The glue will provide 1 lane out of the 4 to the output */
+ data = meson_codec_glue_input_get_data(dai);
+ data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
+ data->params.channels_min);
+ data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
+ data->params.channels_max);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
+ .hw_params = g12a_toacodec_input_hw_params,
+ .set_fmt = meson_codec_glue_input_set_fmt,
+};
+
+static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
+ .startup = meson_codec_glue_output_startup,
+};
+
+#define TOACODEC_STREAM(xname, xsuffix, xchmax) \
+{ \
+ .stream_name = xname " " xsuffix, \
+ .channels_min = 1, \
+ .channels_max = (xchmax), \
+ .rate_min = 5512, \
+ .rate_max = 192000, \
+ .formats = AXG_TDM_FORMATS, \
+}
+
+#define TOACODEC_INPUT(xname, xid) { \
+ .name = xname, \
+ .id = (xid), \
+ .playback = TOACODEC_STREAM(xname, "Playback", 8), \
+ .ops = &g12a_toacodec_input_ops, \
+ .probe = meson_codec_glue_input_dai_probe, \
+ .remove = meson_codec_glue_input_dai_remove, \
+}
+
+#define TOACODEC_OUTPUT(xname, xid) { \
+ .name = xname, \
+ .id = (xid), \
+ .capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
+ .ops = &g12a_toacodec_output_ops, \
+}
+
+static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
+ TOACODEC_INPUT("IN A", TOACODEC_IN_A),
+ TOACODEC_INPUT("IN B", TOACODEC_IN_B),
+ TOACODEC_INPUT("IN C", TOACODEC_IN_C),
+ TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
+};
+
+static int g12a_toacodec_component_probe(struct snd_soc_component *c)
+{
+ /* Initialize the static clock parameters */
+ return snd_soc_component_write(c, TOACODEC_CTRL0,
+ CTRL0_BLK_CAP_INV);
+}
+
+static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
+ { "SRC", "I2S A", "IN A Playback" },
+ { "SRC", "I2S B", "IN B Playback" },
+ { "SRC", "I2S C", "IN C Playback" },
+ { "OUT EN", "Switch", "SRC" },
+ { "OUT Capture", NULL, "OUT EN" },
+};
+
+static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
+ SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
+};
+
+static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
+ .probe = g12a_toacodec_component_probe,
+ .controls = g12a_toacodec_controls,
+ .num_controls = ARRAY_SIZE(g12a_toacodec_controls),
+ .dapm_widgets = g12a_toacodec_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(g12a_toacodec_widgets),
+ .dapm_routes = g12a_toacodec_routes,
+ .num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static const struct regmap_config g12a_toacodec_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static const struct of_device_id g12a_toacodec_of_match[] = {
+ { .compatible = "amlogic,g12a-toacodec", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
+
+static int g12a_toacodec_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ void __iomem *regs;
+ struct regmap *map;
+ int ret;
+
+ ret = device_reset(dev);
+ if (ret)
+ return ret;
+
+ regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
+ if (IS_ERR(map)) {
+ dev_err(dev, "failed to init regmap: %ld\n",
+ PTR_ERR(map));
+ return PTR_ERR(map);
+ }
+
+ return devm_snd_soc_register_component(dev,
+ &g12a_toacodec_component_drv, g12a_toacodec_dai_drv,
+ ARRAY_SIZE(g12a_toacodec_dai_drv));
+}
+
+static struct platform_driver g12a_toacodec_pdrv = {
+ .driver = {
+ .name = G12A_TOACODEC_DRV_NAME,
+ .of_match_table = g12a_toacodec_of_match,
+ },
+ .probe = g12a_toacodec_probe,
+};
+module_platform_driver(g12a_toacodec_pdrv);
+
+MODULE_AUTHOR("Jerome Brunet <jbrunet@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
+MODULE_LICENSE("GPL v2");
--
2.24.1