// SPDX-License-Identifier: (GPL-2.0 OR MIT) // // Copyright (c) 2020 BayLibre, SAS. // Author: Jerome Brunet #include #include #include #include #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 = snd_soc_substream_to_rtd(substream); 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); if (ret) return ret; if (gx_card_cpu_identify(dai_link->cpus, "FIFO")) return meson_card_set_fe_link(card, dai_link, np, true); ret = meson_card_set_be_link(card, dai_link, np); if (ret) return ret; /* Or apply codec to codec params if necessary */ if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL")) { dai_link->c2c_params = &codec_params; dai_link->num_c2c_params = 1; } else { dai_link->no_pcm = 1; /* 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); } 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_new = 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 "); MODULE_LICENSE("GPL v2");