ASoC: meson: add tdm output driver

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>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
index 869b359..08a522b 100644 (file)
--- 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 1a8eb77..a665c6b 100644 (file)
--- 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 (file)
index 0000000..f73368e
--- /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");