253 lines
7.3 KiB
C
253 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2020 BayLibre, SAS.
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// Author: Jerome Brunet <jbrunet@baylibre.com>
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#include <linux/bitfield.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <sound/pcm_params.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/reset.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <dt-bindings/sound/meson-g12a-toacodec.h>
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#include "axg-tdm.h"
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#include "meson-codec-glue.h"
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#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
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#define TOACODEC_CTRL0 0x0
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#define CTRL0_ENABLE_SHIFT 31
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#define CTRL0_DAT_SEL_SHIFT 14
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#define CTRL0_DAT_SEL (0x3 << CTRL0_DAT_SEL_SHIFT)
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#define CTRL0_LANE_SEL 12
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#define CTRL0_LRCLK_SEL GENMASK(9, 8)
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#define CTRL0_BLK_CAP_INV BIT(7)
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#define CTRL0_BCLK_O_INV BIT(6)
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#define CTRL0_BCLK_SEL GENMASK(5, 4)
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#define CTRL0_MCLK_SEL GENMASK(2, 0)
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#define TOACODEC_OUT_CHMAX 2
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static const char * const g12a_toacodec_mux_texts[] = {
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"I2S A", "I2S B", "I2S C",
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};
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static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component =
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snd_soc_dapm_kcontrol_component(kcontrol);
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struct snd_soc_dapm_context *dapm =
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snd_soc_dapm_kcontrol_dapm(kcontrol);
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struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
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unsigned int mux, changed;
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mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
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changed = snd_soc_component_test_bits(component, e->reg,
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CTRL0_DAT_SEL,
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FIELD_PREP(CTRL0_DAT_SEL, mux));
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if (!changed)
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return 0;
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/* Force disconnect of the mux while updating */
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snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
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snd_soc_component_update_bits(component, e->reg,
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CTRL0_DAT_SEL |
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CTRL0_LRCLK_SEL |
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CTRL0_BCLK_SEL,
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FIELD_PREP(CTRL0_DAT_SEL, mux) |
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FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
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FIELD_PREP(CTRL0_BCLK_SEL, mux));
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/*
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* FIXME:
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* On this soc, the glue gets the MCLK directly from the clock
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* controller instead of going the through the TDM interface.
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*
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* Here we assume interface A uses clock A, etc ... While it is
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* true for now, it could be different. Instead the glue should
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* find out the clock used by the interface and select the same
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* source. For that, we will need regmap backed clock mux which
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* is a work in progress
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*/
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snd_soc_component_update_bits(component, e->reg,
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CTRL0_MCLK_SEL,
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FIELD_PREP(CTRL0_MCLK_SEL, mux));
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snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
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return 0;
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}
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static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
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CTRL0_DAT_SEL_SHIFT,
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g12a_toacodec_mux_texts);
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static const struct snd_kcontrol_new g12a_toacodec_mux =
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SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
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snd_soc_dapm_get_enum_double,
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g12a_toacodec_mux_put_enum);
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static const struct snd_kcontrol_new g12a_toacodec_out_enable =
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SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
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CTRL0_ENABLE_SHIFT, 1, 0);
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static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
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SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
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&g12a_toacodec_mux),
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SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
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&g12a_toacodec_out_enable),
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};
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static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct meson_codec_glue_input *data;
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int ret;
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ret = meson_codec_glue_input_hw_params(substream, params, dai);
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if (ret)
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return ret;
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/* The glue will provide 1 lane out of the 4 to the output */
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data = meson_codec_glue_input_get_data(dai);
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data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
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data->params.channels_min);
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data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
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data->params.channels_max);
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return 0;
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}
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static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
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.hw_params = g12a_toacodec_input_hw_params,
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.set_fmt = meson_codec_glue_input_set_fmt,
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};
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static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
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.startup = meson_codec_glue_output_startup,
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};
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#define TOACODEC_STREAM(xname, xsuffix, xchmax) \
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{ \
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.stream_name = xname " " xsuffix, \
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.channels_min = 1, \
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.channels_max = (xchmax), \
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.rate_min = 5512, \
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.rate_max = 192000, \
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.formats = AXG_TDM_FORMATS, \
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}
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#define TOACODEC_INPUT(xname, xid) { \
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.name = xname, \
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.id = (xid), \
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.playback = TOACODEC_STREAM(xname, "Playback", 8), \
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.ops = &g12a_toacodec_input_ops, \
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.probe = meson_codec_glue_input_dai_probe, \
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.remove = meson_codec_glue_input_dai_remove, \
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}
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#define TOACODEC_OUTPUT(xname, xid) { \
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.name = xname, \
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.id = (xid), \
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.capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
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.ops = &g12a_toacodec_output_ops, \
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}
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static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
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TOACODEC_INPUT("IN A", TOACODEC_IN_A),
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TOACODEC_INPUT("IN B", TOACODEC_IN_B),
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TOACODEC_INPUT("IN C", TOACODEC_IN_C),
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TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
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};
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static int g12a_toacodec_component_probe(struct snd_soc_component *c)
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{
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/* Initialize the static clock parameters */
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return snd_soc_component_write(c, TOACODEC_CTRL0,
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CTRL0_BLK_CAP_INV);
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}
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static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
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{ "SRC", "I2S A", "IN A Playback" },
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{ "SRC", "I2S B", "IN B Playback" },
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{ "SRC", "I2S C", "IN C Playback" },
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{ "OUT EN", "Switch", "SRC" },
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{ "OUT Capture", NULL, "OUT EN" },
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};
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static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
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SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
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};
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static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
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.probe = g12a_toacodec_component_probe,
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.controls = g12a_toacodec_controls,
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.num_controls = ARRAY_SIZE(g12a_toacodec_controls),
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.dapm_widgets = g12a_toacodec_widgets,
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.num_dapm_widgets = ARRAY_SIZE(g12a_toacodec_widgets),
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.dapm_routes = g12a_toacodec_routes,
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.num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
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.endianness = 1,
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.non_legacy_dai_naming = 1,
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};
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static const struct regmap_config g12a_toacodec_regmap_cfg = {
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.reg_bits = 32,
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.val_bits = 32,
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.reg_stride = 4,
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};
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static const struct of_device_id g12a_toacodec_of_match[] = {
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{ .compatible = "amlogic,g12a-toacodec", },
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{}
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};
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MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
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static int g12a_toacodec_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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void __iomem *regs;
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struct regmap *map;
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int ret;
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ret = device_reset(dev);
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if (ret)
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return ret;
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regs = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(regs))
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return PTR_ERR(regs);
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map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
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if (IS_ERR(map)) {
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dev_err(dev, "failed to init regmap: %ld\n",
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PTR_ERR(map));
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return PTR_ERR(map);
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}
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return devm_snd_soc_register_component(dev,
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&g12a_toacodec_component_drv, g12a_toacodec_dai_drv,
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ARRAY_SIZE(g12a_toacodec_dai_drv));
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}
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static struct platform_driver g12a_toacodec_pdrv = {
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.driver = {
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.name = G12A_TOACODEC_DRV_NAME,
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.of_match_table = g12a_toacodec_of_match,
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},
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.probe = g12a_toacodec_probe,
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};
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module_platform_driver(g12a_toacodec_pdrv);
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MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
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MODULE_LICENSE("GPL v2");
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