Add the capture memory interface of Amlogic's axg SoCs.
TDM, SPDIF or PDM input devices place audio samples inside this FIFO.
The FIFO content is then pushed to DDR
Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
---
sound/soc/meson/Kconfig | 7 ++
sound/soc/meson/Makefile | 2 +
sound/soc/meson/axg-toddr.c | 199 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 208 insertions(+)
create mode 100644 sound/soc/meson/axg-toddr.c
diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
index cdd78f62e8d7..3916060edcae 100644
--- a/sound/soc/meson/Kconfig
+++ b/sound/soc/meson/Kconfig
@@ -12,4 +12,11 @@ config SND_MESON_AXG_FRDDR
Select Y or M to add support for the frontend playback interfaces
embedded in the Amlogic AXG SoC family
+config SND_MESON_AXG_TODDR
+ tristate "Amlogic AXG Capture FIFO support"
+ select SND_MESON_AXG_FIFO
+ help
+ Select Y or M to add support for the frontend capture interfaces
+ embedded in the Amlogic AXG SoC family
+
endmenu
diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
index 9c5d7d4a8e33..12edf2db2a24 100644
--- a/sound/soc/meson/Makefile
+++ b/sound/soc/meson/Makefile
@@ -2,6 +2,8 @@
snd-soc-meson-axg-fifo-objs := axg-fifo.o
snd-soc-meson-axg-frddr-objs := axg-frddr.o
+snd-soc-meson-axg-toddr-objs := axg-toddr.o
obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
+obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o
diff --git a/sound/soc/meson/axg-toddr.c b/sound/soc/meson/axg-toddr.c
new file mode 100644
index 000000000000..c2c9bb312586
--- /dev/null
+++ b/sound/soc/meson/axg-toddr.c
@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+//
+// Copyright (c) 2018 BayLibre, SAS.
+// Author: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
+
+/* This driver implements the frontend capture DAI of AXG based SoCs */
+
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "axg-fifo.h"
+
+#define CTRL0_TODDR_SEL_RESAMPLE BIT(30)
+#define CTRL0_TODDR_EXT_SIGNED BIT(29)
+#define CTRL0_TODDR_PP_MODE BIT(28)
+#define CTRL0_TODDR_TYPE_MASK GENMASK(15, 13)
+#define CTRL0_TODDR_TYPE(x) ((x) << 13)
+#define CTRL0_TODDR_MSB_POS_MASK GENMASK(12, 8)
+#define CTRL0_TODDR_MSB_POS(x) ((x) << 8)
+#define CTRL0_TODDR_LSB_POS_MASK GENMASK(7, 3)
+#define CTRL0_TODDR_LSB_POS(x) ((x) << 3)
+
+static int axg_toddr_pcm_new(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_dai *dai)
+{
+ return axg_fifo_pcm_new(rtd, SNDRV_PCM_STREAM_CAPTURE);
+}
+
+static int axg_toddr_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
+ unsigned int type, width, msb = 31;
+
+ /*
+ * NOTE:
+ * Almost all backend will place the MSB at bit 31, except SPDIF Input
+ * which will put it at index 28. When adding support for the SPDIF
+ * Input, we'll need to find which type of backend we are connected to.
+ */
+
+ switch (params_physical_width(params)) {
+ case 8:
+ type = 0; /* 8 samples of 8 bits */
+ break;
+ case 16:
+ type = 2; /* 4 samples of 16 bits - right justified */
+ break;
+ case 32:
+ type = 4; /* 2 samples of 32 bits - right justified */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ width = params_width(params);
+
+ regmap_update_bits(fifo->map, FIFO_CTRL0,
+ CTRL0_TODDR_TYPE_MASK |
+ CTRL0_TODDR_MSB_POS_MASK |
+ CTRL0_TODDR_LSB_POS_MASK,
+ CTRL0_TODDR_TYPE(type) |
+ CTRL0_TODDR_MSB_POS(msb) |
+ CTRL0_TODDR_LSB_POS(msb - (width - 1)));
+
+ return 0;
+}
+
+static int axg_toddr_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
+ unsigned int fifo_threshold;
+ int ret;
+
+ /* Enable pclk to access registers and clock the fifo ip */
+ ret = clk_prepare_enable(fifo->pclk);
+ if (ret)
+ return ret;
+
+ /* Select orginal data - resampling not supported ATM */
+ regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_SEL_RESAMPLE, 0);
+
+ /* Only signed format are supported ATM */
+ regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_EXT_SIGNED,
+ CTRL0_TODDR_EXT_SIGNED);
+
+ /* Apply single buffer mode to the interface */
+ regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_PP_MODE, 0);
+
+ /* TODDR does not have a configurable fifo depth */
+ fifo_threshold = AXG_FIFO_MIN_CNT - 1;
+ regmap_update_bits(fifo->map, FIFO_CTRL1, CTRL1_THRESHOLD_MASK,
+ CTRL1_THRESHOLD(fifo_threshold));
+
+ return 0;
+}
+
+static void axg_toddr_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
+
+ clk_disable_unprepare(fifo->pclk);
+}
+
+static const struct snd_soc_dai_ops axg_toddr_ops = {
+ .hw_params = axg_toddr_dai_hw_params,
+ .startup = axg_toddr_dai_startup,
+ .shutdown = axg_toddr_dai_shutdown,
+};
+
+static struct snd_soc_dai_driver axg_toddr_dai_drv = {
+ .name = "TODDR",
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = AXG_FIFO_CH_MAX,
+ .rates = AXG_FIFO_RATES,
+ .formats = AXG_FIFO_FORMATS,
+ },
+ .ops = &axg_toddr_ops,
+ .pcm_new = axg_toddr_pcm_new,
+};
+
+static const char * const axg_toddr_sel_texts[] = {
+ "IN 0", "IN 1", "IN 2", "IN 3", "IN 4", "IN 6"
+};
+
+static const unsigned int axg_toddr_sel_values[] = {
+ 0, 1, 2, 3, 4, 6
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(axg_toddr_sel_enum, FIFO_CTRL0,
+ CTRL0_SEL_SHIFT, CTRL0_SEL_MASK,
+ axg_toddr_sel_texts, axg_toddr_sel_values);
+
+static const struct snd_kcontrol_new axg_toddr_in_mux =
+ SOC_DAPM_ENUM("Input Source", axg_toddr_sel_enum);
+
+static const struct snd_soc_dapm_widget axg_toddr_dapm_widgets[] = {
+ SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_toddr_in_mux),
+ 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 6", NULL, 0, SND_SOC_NOPM, 0, 0),
+};
+
+static const struct snd_soc_dapm_route axg_toddr_dapm_routes[] = {
+ { "Capture", NULL, "SRC SEL" },
+ { "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 6", "IN 6" },
+};
+
+static const struct snd_soc_component_driver axg_toddr_component_drv = {
+ .dapm_widgets = axg_toddr_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(axg_toddr_dapm_widgets),
+ .dapm_routes = axg_toddr_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(axg_toddr_dapm_routes),
+ .ops = &axg_fifo_pcm_ops
+};
+
+static const struct axg_fifo_match_data axg_toddr_match_data = {
+ .component_drv = &axg_toddr_component_drv,
+ .dai_drv = &axg_toddr_dai_drv
+};
+
+static const struct of_device_id axg_toddr_of_match[] = {
+ {
+ .compatible = "amlogic,axg-toddr",
+ .data = &axg_toddr_match_data,
+ }, {}
+};
+MODULE_DEVICE_TABLE(of, axg_toddr_of_match);
+
+static struct platform_driver axg_toddr_pdrv = {
+ .probe = axg_fifo_probe,
+ .driver = {
+ .name = "axg-toddr",
+ .of_match_table = axg_toddr_of_match,
+ },
+};
+module_platform_driver(axg_toddr_pdrv);
+
+MODULE_DESCRIPTION("Amlogic AXG capture fifo driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@xxxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
--
2.14.4
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