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-rw-r--r--sound/soc/meson/axg-card.c375
1 files changed, 375 insertions, 0 deletions
diff --git a/sound/soc/meson/axg-card.c b/sound/soc/meson/axg-card.c
new file mode 100644
index 000000000..2b77010c2
--- /dev/null
+++ b/sound/soc/meson/axg-card.c
@@ -0,0 +1,375 @@
+// 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 <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "axg-tdm.h"
+#include "meson-card.h"
+
+struct axg_dai_link_tdm_mask {
+ u32 tx;
+ u32 rx;
+};
+
+struct axg_dai_link_tdm_data {
+ unsigned int mclk_fs;
+ unsigned int slots;
+ unsigned int slot_width;
+ u32 *tx_mask;
+ u32 *rx_mask;
+ struct axg_dai_link_tdm_mask *codec_masks;
+};
+
+/*
+ * 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 axg_card_tdm_be_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct axg_dai_link_tdm_data *be =
+ (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
+
+ return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
+}
+
+static const struct snd_soc_ops axg_card_tdm_be_ops = {
+ .hw_params = axg_card_tdm_be_hw_params,
+};
+
+static int axg_card_tdm_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct axg_dai_link_tdm_data *be =
+ (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
+ struct snd_soc_dai *codec_dai;
+ int ret, i;
+
+ for_each_rtd_codec_dais(rtd, i, codec_dai) {
+ ret = snd_soc_dai_set_tdm_slot(codec_dai,
+ be->codec_masks[i].tx,
+ be->codec_masks[i].rx,
+ be->slots, be->slot_width);
+ if (ret && ret != -ENOTSUPP) {
+ dev_err(codec_dai->dev,
+ "setting tdm link slots failed\n");
+ return ret;
+ }
+ }
+
+ ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), be->tx_mask, be->rx_mask,
+ be->slots, be->slot_width);
+ if (ret) {
+ dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int axg_card_tdm_dai_lb_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct axg_dai_link_tdm_data *be =
+ (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
+ int ret;
+
+ /* The loopback rx_mask is the pad tx_mask */
+ ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), NULL, be->tx_mask,
+ be->slots, be->slot_width);
+ if (ret) {
+ dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int axg_card_add_tdm_loopback(struct snd_soc_card *card,
+ int *index)
+{
+ struct meson_card *priv = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai_link *pad = &card->dai_link[*index];
+ struct snd_soc_dai_link *lb;
+ struct snd_soc_dai_link_component *dlc;
+ int ret;
+
+ /* extend links */
+ ret = meson_card_reallocate_links(card, card->num_links + 1);
+ if (ret)
+ return ret;
+
+ lb = &card->dai_link[*index + 1];
+
+ lb->name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-lb", pad->name);
+ if (!lb->name)
+ return -ENOMEM;
+
+ dlc = devm_kzalloc(card->dev, 2 * sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ lb->cpus = &dlc[0];
+ lb->codecs = &dlc[1];
+ lb->num_cpus = 1;
+ lb->num_codecs = 1;
+
+ lb->stream_name = lb->name;
+ lb->cpus->of_node = pad->cpus->of_node;
+ lb->cpus->dai_name = "TDM Loopback";
+ lb->codecs->name = "snd-soc-dummy";
+ lb->codecs->dai_name = "snd-soc-dummy-dai";
+ lb->dpcm_capture = 1;
+ lb->no_pcm = 1;
+ lb->ops = &axg_card_tdm_be_ops;
+ lb->init = axg_card_tdm_dai_lb_init;
+
+ /* Provide the same link data to the loopback */
+ priv->link_data[*index + 1] = priv->link_data[*index];
+
+ /*
+ * axg_card_clean_references() will iterate over this link,
+ * make sure the node count is balanced
+ */
+ of_node_get(lb->cpus->of_node);
+
+ /* Let add_links continue where it should */
+ *index += 1;
+
+ return 0;
+}
+
+static int axg_card_parse_cpu_tdm_slots(struct snd_soc_card *card,
+ struct snd_soc_dai_link *link,
+ struct device_node *node,
+ struct axg_dai_link_tdm_data *be)
+{
+ char propname[32];
+ u32 tx, rx;
+ int i;
+
+ be->tx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
+ sizeof(*be->tx_mask), GFP_KERNEL);
+ be->rx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
+ sizeof(*be->rx_mask), GFP_KERNEL);
+ if (!be->tx_mask || !be->rx_mask)
+ return -ENOMEM;
+
+ for (i = 0, tx = 0; i < AXG_TDM_NUM_LANES; i++) {
+ snprintf(propname, 32, "dai-tdm-slot-tx-mask-%d", i);
+ snd_soc_of_get_slot_mask(node, propname, &be->tx_mask[i]);
+ tx = max(tx, be->tx_mask[i]);
+ }
+
+ /* Disable playback is the interface has no tx slots */
+ if (!tx)
+ link->dpcm_playback = 0;
+
+ for (i = 0, rx = 0; i < AXG_TDM_NUM_LANES; i++) {
+ snprintf(propname, 32, "dai-tdm-slot-rx-mask-%d", i);
+ snd_soc_of_get_slot_mask(node, propname, &be->rx_mask[i]);
+ rx = max(rx, be->rx_mask[i]);
+ }
+
+ /* Disable capture is the interface has no rx slots */
+ if (!rx)
+ link->dpcm_capture = 0;
+
+ /* ... but the interface should at least have one of them */
+ if (!tx && !rx) {
+ dev_err(card->dev, "tdm link has no cpu slots\n");
+ return -EINVAL;
+ }
+
+ of_property_read_u32(node, "dai-tdm-slot-num", &be->slots);
+ if (!be->slots) {
+ /*
+ * If the slot number is not provided, set it such as it
+ * accommodates the largest mask
+ */
+ be->slots = fls(max(tx, rx));
+ } else if (be->slots < fls(max(tx, rx)) || be->slots > 32) {
+ /*
+ * Error if the slots can't accommodate the largest mask or
+ * if it is just too big
+ */
+ dev_err(card->dev, "bad slot number\n");
+ return -EINVAL;
+ }
+
+ of_property_read_u32(node, "dai-tdm-slot-width", &be->slot_width);
+
+ return 0;
+}
+
+static int axg_card_parse_codecs_masks(struct snd_soc_card *card,
+ struct snd_soc_dai_link *link,
+ struct device_node *node,
+ struct axg_dai_link_tdm_data *be)
+{
+ struct axg_dai_link_tdm_mask *codec_mask;
+ struct device_node *np;
+
+ codec_mask = devm_kcalloc(card->dev, link->num_codecs,
+ sizeof(*codec_mask), GFP_KERNEL);
+ if (!codec_mask)
+ return -ENOMEM;
+
+ be->codec_masks = codec_mask;
+
+ for_each_child_of_node(node, np) {
+ snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask",
+ &codec_mask->rx);
+ snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask",
+ &codec_mask->tx);
+
+ codec_mask++;
+ }
+
+ return 0;
+}
+
+static int axg_card_parse_tdm(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 axg_dai_link_tdm_data *be;
+ int ret;
+
+ /* Allocate tdm link parameters */
+ be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
+ if (!be)
+ return -ENOMEM;
+ priv->link_data[*index] = be;
+
+ /* Setup tdm link */
+ link->ops = &axg_card_tdm_be_ops;
+ link->init = axg_card_tdm_dai_init;
+ link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
+
+ of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
+
+ ret = axg_card_parse_cpu_tdm_slots(card, link, node, be);
+ if (ret) {
+ dev_err(card->dev, "error parsing tdm link slots\n");
+ return ret;
+ }
+
+ ret = axg_card_parse_codecs_masks(card, link, node, be);
+ if (ret)
+ return ret;
+
+ /* Add loopback if the pad dai has playback */
+ if (link->dpcm_playback) {
+ ret = axg_card_add_tdm_loopback(card, index);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int axg_card_cpu_is_capture_fe(struct device_node *np)
+{
+ return of_device_is_compatible(np, DT_PREFIX "axg-toddr");
+}
+
+static int axg_card_cpu_is_playback_fe(struct device_node *np)
+{
+ return of_device_is_compatible(np, DT_PREFIX "axg-frddr");
+}
+
+static int axg_card_cpu_is_tdm_iface(struct device_node *np)
+{
+ return of_device_is_compatible(np, DT_PREFIX "axg-tdm-iface");
+}
+
+static int axg_card_cpu_is_codec(struct device_node *np)
+{
+ return of_device_is_compatible(np, DT_PREFIX "g12a-tohdmitx") ||
+ of_device_is_compatible(np, DT_PREFIX "g12a-toacodec");
+}
+
+static int axg_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 (axg_card_cpu_is_playback_fe(dai_link->cpus->of_node))
+ return meson_card_set_fe_link(card, dai_link, np, true);
+ else if (axg_card_cpu_is_capture_fe(dai_link->cpus->of_node))
+ return meson_card_set_fe_link(card, dai_link, np, false);
+
+
+ ret = meson_card_set_be_link(card, dai_link, np);
+ if (ret)
+ return ret;
+
+ if (axg_card_cpu_is_codec(dai_link->cpus->of_node)) {
+ dai_link->params = &codec_params;
+ } else {
+ dai_link->no_pcm = 1;
+ snd_soc_dai_link_set_capabilities(dai_link);
+ if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node))
+ ret = axg_card_parse_tdm(card, np, index);
+ }
+
+ return ret;
+}
+
+static const struct meson_card_match_data axg_card_match_data = {
+ .add_link = axg_card_add_link,
+};
+
+static const struct of_device_id axg_card_of_match[] = {
+ {
+ .compatible = "amlogic,axg-sound-card",
+ .data = &axg_card_match_data,
+ }, {}
+};
+MODULE_DEVICE_TABLE(of, axg_card_of_match);
+
+static struct platform_driver axg_card_pdrv = {
+ .probe = meson_card_probe,
+ .remove = meson_card_remove,
+ .driver = {
+ .name = "axg-sound-card",
+ .of_match_table = axg_card_of_match,
+ },
+};
+module_platform_driver(axg_card_pdrv);
+
+MODULE_DESCRIPTION("Amlogic AXG ALSA machine driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL v2");