From 858a3bbbf274ffcecca558f66aaab146c11fdfe9 Mon Sep 17 00:00:00 2001 From: Miquel Date: Fri, 24 Feb 2017 20:51:06 +0100 Subject: [PATCH] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT Signed-off-by: Miquel Blauw ASoC: dionaudio_loco-v2: fix S24_LE format Remove set_bclk_ratio call so 24-bit data is transmitted in 24 bclk cycles. Also remove hw_params and ops as they are no longer needed. Signed-off-by: Matthias Reichl --- sound/soc/bcm/dionaudio_loco-v2.c | 115 ++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c --- /dev/null +++ b/sound/soc/bcm/dionaudio_loco-v2.c @@ -0,0 +1,115 @@ +/* + * ASoC Driver for Dion Audio LOCO-V2 DAC-AMP + * + * Author: Miquel Blauw + * Copyright 2017 + * + * Based on the software of the RPi-DAC writen by Florian Meier + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include + +#include +#include +#include +#include +#include + +static bool digital_gain_0db_limit = true; + +static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd) +{ + if (digital_gain_0db_limit) { + int ret; + struct snd_soc_card *card = rtd->card; + + ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207); + if (ret < 0) + dev_warn(card->dev, "Failed to set volume limit: %d\n", ret); + } + + return 0; +} + +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = { +{ + .name = "DionAudio LOCO-V2", + .stream_name = "DionAudio LOCO-V2 DAC-AMP", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "pcm512x-hifi", + .platform_name = "bcm2708-i2s.0", + .codec_name = "pcm512x.1-004d", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .init = snd_rpi_dionaudio_loco_v2_init, +},}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = { + .name = "Dion Audio LOCO-V2", + .dai_link = snd_rpi_dionaudio_loco_v2_dai, + .num_links = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai), +}; + +static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev) +{ + int ret = 0; + + snd_rpi_dionaudio_loco_v2.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = + &snd_rpi_dionaudio_loco_v2_dai[0]; + + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + if (i2s_node) { + dai->cpu_dai_name = NULL; + dai->cpu_of_node = i2s_node; + dai->platform_name = NULL; + dai->platform_of_node = i2s_node; + } + + digital_gain_0db_limit = !of_property_read_bool( + pdev->dev.of_node, "dionaudio,24db_digital_gain"); + } + + ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_dionaudio_loco_v2); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", + ret); + + return ret; +} + +static const struct of_device_id dionaudio_of_match[] = { + { .compatible = "dionaudio,dionaudio-loco-v2", }, + {}, +}; +MODULE_DEVICE_TABLE(of, dionaudio_of_match); + +static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = { + .driver = { + .name = "snd-rpi-dionaudio-loco-v2", + .owner = THIS_MODULE, + .of_match_table = dionaudio_of_match, + }, + .probe = snd_rpi_dionaudio_loco_v2_probe, +}; + +module_platform_driver(snd_rpi_dionaudio_loco_v2_driver); + +MODULE_AUTHOR("Miquel Blauw "); +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2"); +MODULE_LICENSE("GPL v2");