// SPDX-License-Identifier: (GPL-2.0 OR MIT) // // Copyright (c) 2018 BayLibre, SAS. // Author: Jerome Brunet #include #include #include #include #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 = snd_soc_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(snd_soc_rtd_to_cpu(rtd, 0), be->tx_mask, be->rx_mask, be->slots, be->slot_width); if (ret) { dev_err(snd_soc_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(snd_soc_rtd_to_cpu(rtd, 0), NULL, be->tx_mask, be->slots, be->slot_width); if (ret) { dev_err(snd_soc_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, sizeof(*dlc), GFP_KERNEL); if (!dlc) return -ENOMEM; lb->cpus = dlc; lb->codecs = &snd_soc_dummy_dlc; 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->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; dai_link->nonatomic = true; ret = meson_card_parse_dai(card, np, dai_link->cpus); 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->c2c_params = &codec_params; dai_link->num_c2c_params = 1; } else { dai_link->no_pcm = 1; 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_new = 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 "); MODULE_LICENSE("GPL v2");