[PATCH 11/15] ASoC: meson: add tdm output driver

Jerome Brunet
2018-07-17T15:36:38Z

Add Amlogic's axg tdm output driver which pulls data from FRDDR fifo
and produce the TDM signals for 4 output lanes.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
sound/soc/meson/Kconfig | 8 ++
sound/soc/meson/Makefile | 2 +
sound/soc/meson/axg-tdmout.c | 259 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 269 insertions(+)
create mode 100644 sound/soc/meson/axg-tdmout.c

diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
index 869b359c2ce7..08a522b77749 100644
--- a/sound/soc/meson/Kconfig
+++ b/sound/soc/meson/Kconfig
@@ -27,6 +27,14 @@ config SND_MESON_AXG_TDM_INTERFACE
tristate
select SND_MESON_AXG_TDM_FORMATTER

+config SND_MESON_AXG_TDMOUT
+ tristate "Amlogic AXG TDM Output Support"
+ select SND_MESON_AXG_TDM_FORMATTER
+ select SND_MESON_AXG_TDM_INTERFACE
+ help
+ Select Y or M to add support for TDM output formatter embedded
+ in the Amlogic AXG SoC family
+
config SND_MESON_AXG_SPDIFOUT
tristate "Amlogic AXG SPDIF Output Support"
imply SND_SOC_SPDIF
diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
index 1a8eb77402e3..a665c6b76a95 100644
--- a/sound/soc/meson/Makefile
+++ b/sound/soc/meson/Makefile
@@ -5,6 +5,7 @@ snd-soc-meson-axg-frddr-objs := axg-frddr.o
snd-soc-meson-axg-toddr-objs := axg-toddr.o
snd-soc-meson-axg-tdm-formatter-objs := axg-tdm-formatter.o
snd-soc-meson-axg-tdm-interface-objs := axg-tdm-interface.o
+snd-soc-meson-axg-tdmout-objs := axg-tdmout.o
snd-soc-meson-axg-spdifout-objs := axg-spdifout.o

obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
@@ -12,4 +13,5 @@ obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o
obj-$(CONFIG_SND_MESON_AXG_TDM_FORMATTER) += snd-soc-meson-axg-tdm-formatter.o
obj-$(CONFIG_SND_MESON_AXG_TDM_INTERFACE) += snd-soc-meson-axg-tdm-interface.o
+obj-$(CONFIG_SND_MESON_AXG_TDMOUT) += snd-soc-meson-axg-tdmout.o
obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o
diff --git a/sound/soc/meson/axg-tdmout.c b/sound/soc/meson/axg-tdmout.c
new file mode 100644
index 000000000000..f73368ee1088
--- /dev/null
+++ b/sound/soc/meson/axg-tdmout.c
@@ -0,0 +1,259 @@
+// 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 TDMOUT_CTRL0 0x00
+#define TDMOUT_CTRL0_BITNUM_MASK GENMASK(4, 0)
+#define TDMOUT_CTRL0_BITNUM(x) ((x) << 0)
+#define TDMOUT_CTRL0_SLOTNUM_MASK GENMASK(9, 5)
+#define TDMOUT_CTRL0_SLOTNUM(x) ((x) << 5)
+#define TDMOUT_CTRL0_INIT_BITNUM_MASK GENMASK(19, 15)
+#define TDMOUT_CTRL0_INIT_BITNUM(x) ((x) << 15)
+#define TDMOUT_CTRL0_ENABLE BIT(31)
+#define TDMOUT_CTRL0_RST_OUT BIT(29)
+#define TDMOUT_CTRL0_RST_IN BIT(28)
+#define TDMOUT_CTRL1 0x04
+#define TDMOUT_CTRL1_TYPE_MASK GENMASK(6, 4)
+#define TDMOUT_CTRL1_TYPE(x) ((x) << 4)
+#define TDMOUT_CTRL1_MSB_POS_MASK GENMASK(12, 8)
+#define TDMOUT_CTRL1_MSB_POS(x) ((x) << 8)
+#define TDMOUT_CTRL1_SEL_SHIFT 24
+#define TDMOUT_CTRL1_GAIN_EN 26
+#define TDMOUT_CTRL1_WS_INV BIT(28)
+#define TDMOUT_SWAP 0x08
+#define TDMOUT_MASK0 0x0c
+#define TDMOUT_MASK1 0x10
+#define TDMOUT_MASK2 0x14
+#define TDMOUT_MASK3 0x18
+#define TDMOUT_STAT 0x1c
+#define TDMOUT_GAIN0 0x20
+#define TDMOUT_GAIN1 0x24
+#define TDMOUT_MUTE_VAL 0x28
+#define TDMOUT_MUTE0 0x2c
+#define TDMOUT_MUTE1 0x30
+#define TDMOUT_MUTE2 0x34
+#define TDMOUT_MUTE3 0x38
+#define TDMOUT_MASK_VAL 0x3c
+
+static const struct regmap_config axg_tdmout_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = TDMOUT_MASK_VAL,
+};
+
+static const struct snd_kcontrol_new axg_tdmout_controls[] = {
+ SOC_DOUBLE("Lane 0 Volume", TDMOUT_GAIN0, 0, 8, 255, 0),
+ SOC_DOUBLE("Lane 1 Volume", TDMOUT_GAIN0, 16, 24, 255, 0),
+ SOC_DOUBLE("Lane 2 Volume", TDMOUT_GAIN1, 0, 8, 255, 0),
+ SOC_DOUBLE("Lane 3 Volume", TDMOUT_GAIN1, 16, 24, 255, 0),
+ SOC_SINGLE("Gain Enable Switch", TDMOUT_CTRL1,
+ TDMOUT_CTRL1_GAIN_EN, 1, 0),
+};
+
+static const char * const tdmout_sel_texts[] = {
+ "IN 0", "IN 1", "IN 2",
+};
+
+static SOC_ENUM_SINGLE_DECL(axg_tdmout_sel_enum, TDMOUT_CTRL1,
+ TDMOUT_CTRL1_SEL_SHIFT, tdmout_sel_texts);
+
+static const struct snd_kcontrol_new axg_tdmout_in_mux =
+ SOC_DAPM_ENUM("Input Source", axg_tdmout_sel_enum);
+
+static struct snd_soc_dai *
+axg_tdmout_get_be(struct snd_soc_dapm_widget *w)
+{
+ struct snd_soc_dapm_path *p = NULL;
+ struct snd_soc_dai *be;
+
+ snd_soc_dapm_widget_for_each_sink_path(w, p) {
+ if (!p->connect)
+ continue;
+
+ if (p->sink->id == snd_soc_dapm_dai_in)
+ return (struct snd_soc_dai *)p->sink->priv;
+
+ be = axg_tdmout_get_be(p->sink);
+ if (be)
+ return be;
+ }
+
+ return NULL;
+}
+
+static struct axg_tdm_stream *
+axg_tdmout_get_tdm_stream(struct snd_soc_dapm_widget *w)
+{
+ struct snd_soc_dai *be = axg_tdmout_get_be(w);
+
+ if (!be)
+ return NULL;
+
+ return be->playback_dma_data;
+}
+
+static void axg_tdmout_enable(struct regmap *map)
+{
+ /* Apply both reset */
+ regmap_update_bits(map, TDMOUT_CTRL0,
+ TDMOUT_CTRL0_RST_OUT | TDMOUT_CTRL0_RST_IN, 0);
+
+ /* Clear out reset before in reset */
+ regmap_update_bits(map, TDMOUT_CTRL0,
+ TDMOUT_CTRL0_RST_OUT, TDMOUT_CTRL0_RST_OUT);
+ regmap_update_bits(map, TDMOUT_CTRL0,
+ TDMOUT_CTRL0_RST_IN, TDMOUT_CTRL0_RST_IN);
+
+ /* Actually enable tdmout */
+ regmap_update_bits(map, TDMOUT_CTRL0,
+ TDMOUT_CTRL0_ENABLE, TDMOUT_CTRL0_ENABLE);
+}
+
+static void axg_tdmout_disable(struct regmap *map)
+{
+ regmap_update_bits(map, TDMOUT_CTRL0, TDMOUT_CTRL0_ENABLE, 0);
+}
+
+static int axg_tdmout_prepare(struct regmap *map, struct axg_tdm_stream *ts)
+{
+ unsigned int val = 0;
+
+ /* Set the stream skew */
+ switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_DSP_A:
+ val |= TDMOUT_CTRL0_INIT_BITNUM(1);
+ break;
+
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_DSP_B:
+ val |= TDMOUT_CTRL0_INIT_BITNUM(2);
+ break;
+
+ default:
+ pr_err("Unsupported format: %u\n",
+ ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+ return -EINVAL;
+ }
+
+ /* Set the slot width */
+ val |= TDMOUT_CTRL0_BITNUM(ts->iface->slot_width - 1);
+
+ /* Set the slot number */
+ val |= TDMOUT_CTRL0_SLOTNUM(ts->iface->slots - 1);
+
+ regmap_update_bits(map, TDMOUT_CTRL0,
+ TDMOUT_CTRL0_INIT_BITNUM_MASK |
+ TDMOUT_CTRL0_BITNUM_MASK |
+ TDMOUT_CTRL0_SLOTNUM_MASK, val);
+
+ /* Set the sample width */
+ val = TDMOUT_CTRL1_MSB_POS(ts->width - 1);
+
+ /* FIFO data are arranged in chunks of 64bits */
+ switch (ts->physical_width) {
+ case 8:
+ /* 8 samples of 8 bits */
+ val |= TDMOUT_CTRL1_TYPE(0);
+ break;
+ case 16:
+ /* 4 samples of 16 bits - right justified */
+ val |= TDMOUT_CTRL1_TYPE(2);
+ break;
+ case 32:
+ /* 2 samples of 32 bits - right justified */
+ val |= TDMOUT_CTRL1_TYPE(4);
+ break;
+ default:
+ pr_err("Unsupported physical width: %u\n",
+ ts->physical_width);
+ return -EINVAL;
+ }
+
+ /* If the sample clock is inverted, invert it back for the formatter */
+ if (axg_tdm_lrclk_invert(ts->iface->fmt))
+ val |= TDMOUT_CTRL1_WS_INV;
+
+ regmap_update_bits(map, TDMOUT_CTRL1,
+ (TDMOUT_CTRL1_TYPE_MASK | TDMOUT_CTRL1_MSB_POS_MASK |
+ TDMOUT_CTRL1_WS_INV), val);
+
+ /* Set static swap mask configuration */
+ regmap_write(map, TDMOUT_SWAP, 0x76543210);
+
+ return axg_tdm_formatter_set_channel_masks(map, ts, TDMOUT_MASK0);
+}
+
+static const struct snd_soc_dapm_widget axg_tdmout_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_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_tdmout_in_mux),
+ SND_SOC_DAPM_PGA_E("ENC", 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_tdmout_dapm_routes[] = {
+ { "SRC SEL", "IN 0", "IN 0" },
+ { "SRC SEL", "IN 1", "IN 1" },
+ { "SRC SEL", "IN 2", "IN 2" },
+ { "ENC", NULL, "SRC SEL" },
+ { "OUT", NULL, "ENC" },
+};
+
+static const struct snd_soc_component_driver axg_tdmout_component_drv = {
+ .controls = axg_tdmout_controls,
+ .num_controls = ARRAY_SIZE(axg_tdmout_controls),
+ .dapm_widgets = axg_tdmout_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(axg_tdmout_dapm_widgets),
+ .dapm_routes = axg_tdmout_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(axg_tdmout_dapm_routes),
+};
+
+static const struct axg_tdm_formatter_ops axg_tdmout_ops = {
+ .get_stream = axg_tdmout_get_tdm_stream,
+ .prepare = axg_tdmout_prepare,
+ .enable = axg_tdmout_enable,
+ .disable = axg_tdmout_disable,
+};
+
+static const struct axg_tdm_formatter_driver axg_tdmout_drv = {
+ .component_drv = &axg_tdmout_component_drv,
+ .regmap_cfg = &axg_tdmout_regmap_cfg,
+ .ops = &axg_tdmout_ops,
+ .invert_sclk = true,
+};
+
+static const struct of_device_id axg_tdmout_of_match[] = {
+ {
+ .compatible = "amlogic,axg-tdmout",
+ .data = &axg_tdmout_drv,
+ }, {}
+};
+MODULE_DEVICE_TABLE(of, axg_tdmout_of_match);
+
+static struct platform_driver axg_tdmout_pdrv = {
+ .probe = axg_tdm_formatter_probe,
+ .driver = {
+ .name = "axg-tdmout",
+ .of_match_table = axg_tdmout_of_match,
+ },
+};
+module_platform_driver(axg_tdmout_pdrv);
+
+MODULE_DESCRIPTION("Amlogic AXG TDM output formatter driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL v2");
--
2.14.4