376 lines
9.6 KiB
C
376 lines
9.6 KiB
C
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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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//
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// Copyright (c) 2018 BayLibre, SAS.
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// Author: Jerome Brunet <jbrunet@baylibre.com>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include "axg-tdm.h"
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#include "meson-card.h"
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struct axg_dai_link_tdm_mask {
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u32 tx;
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u32 rx;
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};
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struct axg_dai_link_tdm_data {
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unsigned int mclk_fs;
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unsigned int slots;
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unsigned int slot_width;
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u32 *tx_mask;
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u32 *rx_mask;
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struct axg_dai_link_tdm_mask *codec_masks;
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};
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/*
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* Base params for the codec to codec links
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* Those will be over-written by the CPU side of the link
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*/
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static const struct snd_soc_pcm_stream codec_params = {
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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.rate_min = 5525,
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.rate_max = 192000,
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.channels_min = 1,
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.channels_max = 8,
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};
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static int axg_card_tdm_be_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
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}
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static const struct snd_soc_ops axg_card_tdm_be_ops = {
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.hw_params = axg_card_tdm_be_hw_params,
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};
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static int axg_card_tdm_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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struct snd_soc_dai *codec_dai;
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int ret, i;
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for_each_rtd_codec_dais(rtd, i, codec_dai) {
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ret = snd_soc_dai_set_tdm_slot(codec_dai,
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be->codec_masks[i].tx,
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be->codec_masks[i].rx,
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be->slots, be->slot_width);
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if (ret && ret != -ENOTSUPP) {
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dev_err(codec_dai->dev,
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"setting tdm link slots failed\n");
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return ret;
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}
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}
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ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), be->tx_mask, be->rx_mask,
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be->slots, be->slot_width);
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if (ret) {
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dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
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return ret;
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}
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return 0;
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}
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static int axg_card_tdm_dai_lb_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
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struct axg_dai_link_tdm_data *be =
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(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
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int ret;
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/* The loopback rx_mask is the pad tx_mask */
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ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), NULL, be->tx_mask,
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be->slots, be->slot_width);
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if (ret) {
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dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
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return ret;
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}
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return 0;
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}
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static int axg_card_add_tdm_loopback(struct snd_soc_card *card,
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int *index)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct snd_soc_dai_link *pad = &card->dai_link[*index];
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struct snd_soc_dai_link *lb;
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struct snd_soc_dai_link_component *dlc;
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int ret;
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/* extend links */
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ret = meson_card_reallocate_links(card, card->num_links + 1);
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if (ret)
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return ret;
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lb = &card->dai_link[*index + 1];
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lb->name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-lb", pad->name);
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if (!lb->name)
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return -ENOMEM;
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dlc = devm_kzalloc(card->dev, 2 * sizeof(*dlc), GFP_KERNEL);
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if (!dlc)
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return -ENOMEM;
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lb->cpus = &dlc[0];
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lb->codecs = &dlc[1];
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lb->num_cpus = 1;
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lb->num_codecs = 1;
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lb->stream_name = lb->name;
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lb->cpus->of_node = pad->cpus->of_node;
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lb->cpus->dai_name = "TDM Loopback";
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lb->codecs->name = "snd-soc-dummy";
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lb->codecs->dai_name = "snd-soc-dummy-dai";
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lb->dpcm_capture = 1;
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lb->no_pcm = 1;
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lb->ops = &axg_card_tdm_be_ops;
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lb->init = axg_card_tdm_dai_lb_init;
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/* Provide the same link data to the loopback */
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priv->link_data[*index + 1] = priv->link_data[*index];
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/*
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* axg_card_clean_references() will iterate over this link,
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* make sure the node count is balanced
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*/
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of_node_get(lb->cpus->of_node);
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/* Let add_links continue where it should */
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*index += 1;
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return 0;
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}
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static int axg_card_parse_cpu_tdm_slots(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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struct axg_dai_link_tdm_data *be)
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{
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char propname[32];
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u32 tx, rx;
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int i;
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be->tx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
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sizeof(*be->tx_mask), GFP_KERNEL);
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be->rx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
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sizeof(*be->rx_mask), GFP_KERNEL);
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if (!be->tx_mask || !be->rx_mask)
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return -ENOMEM;
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for (i = 0, tx = 0; i < AXG_TDM_NUM_LANES; i++) {
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snprintf(propname, 32, "dai-tdm-slot-tx-mask-%d", i);
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snd_soc_of_get_slot_mask(node, propname, &be->tx_mask[i]);
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tx = max(tx, be->tx_mask[i]);
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}
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/* Disable playback is the interface has no tx slots */
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if (!tx)
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link->dpcm_playback = 0;
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for (i = 0, rx = 0; i < AXG_TDM_NUM_LANES; i++) {
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snprintf(propname, 32, "dai-tdm-slot-rx-mask-%d", i);
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snd_soc_of_get_slot_mask(node, propname, &be->rx_mask[i]);
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rx = max(rx, be->rx_mask[i]);
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}
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/* Disable capture is the interface has no rx slots */
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if (!rx)
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link->dpcm_capture = 0;
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/* ... but the interface should at least have one of them */
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if (!tx && !rx) {
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dev_err(card->dev, "tdm link has no cpu slots\n");
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return -EINVAL;
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}
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of_property_read_u32(node, "dai-tdm-slot-num", &be->slots);
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if (!be->slots) {
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/*
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* If the slot number is not provided, set it such as it
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* accommodates the largest mask
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*/
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be->slots = fls(max(tx, rx));
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} else if (be->slots < fls(max(tx, rx)) || be->slots > 32) {
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/*
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* Error if the slots can't accommodate the largest mask or
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* if it is just too big
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*/
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dev_err(card->dev, "bad slot number\n");
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return -EINVAL;
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}
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of_property_read_u32(node, "dai-tdm-slot-width", &be->slot_width);
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return 0;
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}
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static int axg_card_parse_codecs_masks(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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struct axg_dai_link_tdm_data *be)
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{
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struct axg_dai_link_tdm_mask *codec_mask;
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struct device_node *np;
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codec_mask = devm_kcalloc(card->dev, link->num_codecs,
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sizeof(*codec_mask), GFP_KERNEL);
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if (!codec_mask)
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return -ENOMEM;
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be->codec_masks = codec_mask;
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for_each_child_of_node(node, np) {
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snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask",
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&codec_mask->rx);
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snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask",
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&codec_mask->tx);
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codec_mask++;
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}
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return 0;
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}
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static int axg_card_parse_tdm(struct snd_soc_card *card,
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struct device_node *node,
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int *index)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct snd_soc_dai_link *link = &card->dai_link[*index];
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struct axg_dai_link_tdm_data *be;
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int ret;
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/* Allocate tdm link parameters */
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be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
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if (!be)
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return -ENOMEM;
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priv->link_data[*index] = be;
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/* Setup tdm link */
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link->ops = &axg_card_tdm_be_ops;
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link->init = axg_card_tdm_dai_init;
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link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
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of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
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ret = axg_card_parse_cpu_tdm_slots(card, link, node, be);
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if (ret) {
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dev_err(card->dev, "error parsing tdm link slots\n");
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return ret;
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}
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ret = axg_card_parse_codecs_masks(card, link, node, be);
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if (ret)
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return ret;
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/* Add loopback if the pad dai has playback */
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if (link->dpcm_playback) {
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ret = axg_card_add_tdm_loopback(card, index);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int axg_card_cpu_is_capture_fe(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-toddr");
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}
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static int axg_card_cpu_is_playback_fe(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-frddr");
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}
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static int axg_card_cpu_is_tdm_iface(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "axg-tdm-iface");
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}
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static int axg_card_cpu_is_codec(struct device_node *np)
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{
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return of_device_is_compatible(np, DT_PREFIX "g12a-tohdmitx") ||
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of_device_is_compatible(np, DT_PREFIX "g12a-toacodec");
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}
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static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np,
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int *index)
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{
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struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
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struct snd_soc_dai_link_component *cpu;
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int ret;
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cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
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if (!cpu)
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return -ENOMEM;
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dai_link->cpus = cpu;
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dai_link->num_cpus = 1;
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ret = meson_card_parse_dai(card, np, &dai_link->cpus->of_node,
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&dai_link->cpus->dai_name);
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if (ret)
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return ret;
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if (axg_card_cpu_is_playback_fe(dai_link->cpus->of_node))
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return meson_card_set_fe_link(card, dai_link, np, true);
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else if (axg_card_cpu_is_capture_fe(dai_link->cpus->of_node))
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return meson_card_set_fe_link(card, dai_link, np, false);
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ret = meson_card_set_be_link(card, dai_link, np);
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if (ret)
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return ret;
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if (axg_card_cpu_is_codec(dai_link->cpus->of_node)) {
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dai_link->params = &codec_params;
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} else {
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dai_link->no_pcm = 1;
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snd_soc_dai_link_set_capabilities(dai_link);
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if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node))
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ret = axg_card_parse_tdm(card, np, index);
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}
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return ret;
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}
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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");
|