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authorJerome Brunet <jbrunet@baylibre.com>2020-02-13 16:51:59 +0100
committerMark Brown <broonie@kernel.org>2020-02-13 20:57:27 +0000
commite37a0c313a0f8ba0b8de9c30db98fbc77bd8d446 (patch)
treeb2a9b7053afa4d17b0974edb8107cbc3d47af7e2 /sound/soc/meson/gx-card.c
parentfd00366b8e4125d29e32d49053a702ddf77430f6 (diff)
ASoC: meson: gx: add sound card support
Add support for the sound card used on the amlogic GX SoC family Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Link: https://lore.kernel.org/r/20200213155159.3235792-10-jbrunet@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/meson/gx-card.c')
-rw-r--r--sound/soc/meson/gx-card.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/sound/soc/meson/gx-card.c b/sound/soc/meson/gx-card.c
new file mode 100644
index 000000000000..7b01dcb73e5e
--- /dev/null
+++ b/sound/soc/meson/gx-card.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+//
+// Copyright (c) 2020 BayLibre, SAS.
+// Author: Jerome Brunet <jbrunet@baylibre.com>
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "meson-card.h"
+
+struct gx_dai_link_i2s_data {
+ unsigned int mclk_fs;
+};
+
+/*
+ * Base params for the codec to codec links
+ * Those will be over-written by the CPU side of the link
+ */
+static const struct snd_soc_pcm_stream codec_params = {
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ .rate_min = 5525,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+};
+
+static int gx_card_i2s_be_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct gx_dai_link_i2s_data *be =
+ (struct gx_dai_link_i2s_data *)priv->link_data[rtd->num];
+
+ return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
+}
+
+static const struct snd_soc_ops gx_card_i2s_be_ops = {
+ .hw_params = gx_card_i2s_be_hw_params,
+};
+
+static int gx_card_parse_i2s(struct snd_soc_card *card,
+ struct device_node *node,
+ int *index)
+{
+ struct meson_card *priv = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai_link *link = &card->dai_link[*index];
+ struct gx_dai_link_i2s_data *be;
+
+ /* Allocate i2s link parameters */
+ be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
+ if (!be)
+ return -ENOMEM;
+ priv->link_data[*index] = be;
+
+ /* Setup i2s link */
+ link->ops = &gx_card_i2s_be_ops;
+ link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
+
+ of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
+
+ return 0;
+}
+
+static int gx_card_cpu_identify(struct snd_soc_dai_link_component *c,
+ char *match)
+{
+ if (of_device_is_compatible(c->of_node, DT_PREFIX "aiu")) {
+ if (strstr(c->dai_name, match))
+ return 1;
+ }
+
+ /* dai not matched */
+ return 0;
+}
+
+static int gx_card_add_link(struct snd_soc_card *card, struct device_node *np,
+ int *index)
+{
+ struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
+ struct snd_soc_dai_link_component *cpu;
+ int ret;
+
+ cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
+ if (!cpu)
+ return -ENOMEM;
+
+ dai_link->cpus = cpu;
+ dai_link->num_cpus = 1;
+
+ ret = meson_card_parse_dai(card, np, &dai_link->cpus->of_node,
+ &dai_link->cpus->dai_name);
+ if (ret)
+ return ret;
+
+ if (gx_card_cpu_identify(dai_link->cpus, "FIFO"))
+ ret = meson_card_set_fe_link(card, dai_link, np, true);
+ else
+ ret = meson_card_set_be_link(card, dai_link, np);
+
+ if (ret)
+ return ret;
+
+ /* Check if the cpu is the i2s encoder and parse i2s data */
+ if (gx_card_cpu_identify(dai_link->cpus, "I2S Encoder"))
+ ret = gx_card_parse_i2s(card, np, index);
+
+ /* Or apply codec to codec params if necessary */
+ else if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL"))
+ dai_link->params = &codec_params;
+
+ return ret;
+}
+
+static const struct meson_card_match_data gx_card_match_data = {
+ .add_link = gx_card_add_link,
+};
+
+static const struct of_device_id gx_card_of_match[] = {
+ {
+ .compatible = "amlogic,gx-sound-card",
+ .data = &gx_card_match_data,
+ }, {}
+};
+MODULE_DEVICE_TABLE(of, gx_card_of_match);
+
+static struct platform_driver gx_card_pdrv = {
+ .probe = meson_card_probe,
+ .remove = meson_card_remove,
+ .driver = {
+ .name = "gx-sound-card",
+ .of_match_table = gx_card_of_match,
+ },
+};
+module_platform_driver(gx_card_pdrv);
+
+MODULE_DESCRIPTION("Amlogic GX ALSA machine driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL v2");