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375 lines
9.6 KiB
375 lines
9.6 KiB
// 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 <[email protected]> |
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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 = { |
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.add_link = axg_card_add_link, |
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}; |
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static const struct of_device_id axg_card_of_match[] = { |
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{ |
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.compatible = "amlogic,axg-sound-card", |
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.data = &axg_card_match_data, |
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}, {} |
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}; |
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MODULE_DEVICE_TABLE(of, axg_card_of_match); |
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static struct platform_driver axg_card_pdrv = { |
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.probe = meson_card_probe, |
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.remove = meson_card_remove, |
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.driver = { |
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.name = "axg-sound-card", |
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.of_match_table = axg_card_of_match, |
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}, |
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}; |
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module_platform_driver(axg_card_pdrv); |
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MODULE_DESCRIPTION("Amlogic AXG ALSA machine driver"); |
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MODULE_AUTHOR("Jerome Brunet <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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