diff options
Diffstat (limited to 'sound/soc/bcm/audioinjector-octo-soundcard.c')
| -rw-r--r-- | sound/soc/bcm/audioinjector-octo-soundcard.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/sound/soc/bcm/audioinjector-octo-soundcard.c b/sound/soc/bcm/audioinjector-octo-soundcard.c new file mode 100644 index 000000000000..3aeda5e7e1cd --- /dev/null +++ b/sound/soc/bcm/audioinjector-octo-soundcard.c @@ -0,0 +1,341 @@ +/* + * ASoC Driver for AudioInjector Pi octo channel soundcard (hat) + * + * Created on: 27-October-2016 + * Author: flatmax@flatmax.org + * based on audioinjector-pi-soundcard.c + * + * Copyright (C) 2016 Flatmax Pty. Ltd. + * + * 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 <linux/module.h> +#include <linux/types.h> +#include <linux/gpio/consumer.h> + +#include <sound/core.h> +#include <sound/soc.h> +#include <sound/pcm_params.h> +#include <sound/control.h> + +static struct gpio_descs *mult_gpios; +static struct gpio_desc *codec_rst_gpio; +static unsigned int audioinjector_octo_rate; +static bool non_stop_clocks; + +static const unsigned int audioinjector_octo_rates[] = { + 96000, 48000, 32000, 24000, 16000, 8000, 88200, 44100, 29400, 22050, 14700, +}; + +static struct snd_pcm_hw_constraint_list audioinjector_octo_constraints = { + .list = audioinjector_octo_rates, + .count = ARRAY_SIZE(audioinjector_octo_rates), +}; + +static int audioinjector_octo_dai_init(struct snd_soc_pcm_runtime *rtd) +{ + return snd_soc_dai_set_bclk_ratio(asoc_rtd_to_cpu(rtd, 0), 64); +} + +static int audioinjector_octo_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_min = 8; + asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_max = 8; + asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_min = 8; + asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_max = 8; + asoc_rtd_to_codec(rtd, 0)->driver->capture.channels_max = 8; + + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + &audioinjector_octo_constraints); + + return 0; +} + +static void audioinjector_octo_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_min = 2; + asoc_rtd_to_cpu(rtd, 0)->driver->playback.channels_max = 2; + asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_min = 2; + asoc_rtd_to_cpu(rtd, 0)->driver->capture.channels_max = 2; + asoc_rtd_to_codec(rtd, 0)->driver->capture.channels_max = 6; +} + +static int audioinjector_octo_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + + // set codec DAI configuration + int ret = snd_soc_dai_set_fmt(asoc_rtd_to_codec(rtd, 0), + SND_SOC_DAIFMT_CBS_CFS|SND_SOC_DAIFMT_DSP_A| + SND_SOC_DAIFMT_NB_NF); + if (ret < 0) + return ret; + + // set cpu DAI configuration + ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), + SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S| + SND_SOC_DAIFMT_NB_NF); + if (ret < 0) + return ret; + + audioinjector_octo_rate = params_rate(params); + + // Set the correct sysclock for the codec + switch (audioinjector_octo_rate) { + case 96000: + case 48000: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000, + 0); + break; + case 24000: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/2, + 0); + break; + case 32000: + case 16000: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/3, + 0); + break; + case 8000: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 49152000/6, + 0); + break; + case 88200: + case 44100: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400, + 0); + break; + case 22050: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400/2, + 0); + break; + case 29400: + case 14700: + return snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, 45185400/3, + 0); + break; + default: + return -EINVAL; + } +} + +static int audioinjector_octo_trigger(struct snd_pcm_substream *substream, + int cmd){ + DECLARE_BITMAP(mult, 4); + + memset(mult, 0, sizeof(mult)); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (!non_stop_clocks) + break; + /* Drop through... */ + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + switch (audioinjector_octo_rate) { + case 96000: + __assign_bit(3, mult, 1); + case 88200: + __assign_bit(1, mult, 1); + __assign_bit(2, mult, 1); + break; + case 48000: + __assign_bit(3, mult, 1); + case 44100: + __assign_bit(2, mult, 1); + break; + case 32000: + __assign_bit(3, mult, 1); + case 29400: + __assign_bit(0, mult, 1); + __assign_bit(1, mult, 1); + break; + case 24000: + __assign_bit(3, mult, 1); + case 22050: + __assign_bit(1, mult, 1); + break; + case 16000: + __assign_bit(3, mult, 1); + case 14700: + __assign_bit(0, mult, 1); + break; + case 8000: + __assign_bit(3, mult, 1); + break; + default: + return -EINVAL; + } + break; + default: + return -EINVAL; + } + gpiod_set_array_value_cansleep(mult_gpios->ndescs, mult_gpios->desc, + NULL, mult); + + return 0; +} + +static struct snd_soc_ops audioinjector_octo_ops = { + .startup = audioinjector_octo_startup, + .shutdown = audioinjector_octo_shutdown, + .hw_params = audioinjector_octo_hw_params, + .trigger = audioinjector_octo_trigger, +}; + +SND_SOC_DAILINK_DEFS(audioinjector_octo, + DAILINK_COMP_ARRAY(COMP_EMPTY()), + DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")), + DAILINK_COMP_ARRAY(COMP_EMPTY())); + +static struct snd_soc_dai_link audioinjector_octo_dai[] = { + { + .name = "AudioInjector Octo", + .stream_name = "AudioInject-HIFI", + .ops = &audioinjector_octo_ops, + .init = audioinjector_octo_dai_init, + .symmetric_rates = 1, + .symmetric_channels = 1, + SND_SOC_DAILINK_REG(audioinjector_octo), + }, +}; + +static const struct snd_soc_dapm_widget audioinjector_octo_widgets[] = { + SND_SOC_DAPM_OUTPUT("OUTPUTS0"), + SND_SOC_DAPM_OUTPUT("OUTPUTS1"), + SND_SOC_DAPM_OUTPUT("OUTPUTS2"), + SND_SOC_DAPM_OUTPUT("OUTPUTS3"), + SND_SOC_DAPM_INPUT("INPUTS0"), + SND_SOC_DAPM_INPUT("INPUTS1"), + SND_SOC_DAPM_INPUT("INPUTS2"), +}; + +static const struct snd_soc_dapm_route audioinjector_octo_route[] = { + /* Balanced outputs */ + {"OUTPUTS0", NULL, "AOUT1L"}, + {"OUTPUTS0", NULL, "AOUT1R"}, + {"OUTPUTS1", NULL, "AOUT2L"}, + {"OUTPUTS1", NULL, "AOUT2R"}, + {"OUTPUTS2", NULL, "AOUT3L"}, + {"OUTPUTS2", NULL, "AOUT3R"}, + {"OUTPUTS3", NULL, "AOUT4L"}, + {"OUTPUTS3", NULL, "AOUT4R"}, + + /* Balanced inputs */ + {"AIN1L", NULL, "INPUTS0"}, + {"AIN1R", NULL, "INPUTS0"}, + {"AIN2L", NULL, "INPUTS1"}, + {"AIN2R", NULL, "INPUTS1"}, + {"AIN3L", NULL, "INPUTS2"}, + {"AIN3R", NULL, "INPUTS2"}, +}; + +static struct snd_soc_card snd_soc_audioinjector_octo = { + .name = "audioinjector-octo-soundcard", + .dai_link = audioinjector_octo_dai, + .num_links = ARRAY_SIZE(audioinjector_octo_dai), + + .dapm_widgets = audioinjector_octo_widgets, + .num_dapm_widgets = ARRAY_SIZE(audioinjector_octo_widgets), + .dapm_routes = audioinjector_octo_route, + .num_dapm_routes = ARRAY_SIZE(audioinjector_octo_route), +}; + +static int audioinjector_octo_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_soc_audioinjector_octo; + int ret; + + card->dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct snd_soc_dai_link *dai = &audioinjector_octo_dai[0]; + struct device_node *i2s_node = + of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + struct device_node *codec_node = + of_parse_phandle(pdev->dev.of_node, + "codec", 0); + + mult_gpios = devm_gpiod_get_array_optional(&pdev->dev, "mult", + GPIOD_OUT_LOW); + if (IS_ERR(mult_gpios)) + return PTR_ERR(mult_gpios); + + codec_rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(codec_rst_gpio)) + return PTR_ERR(codec_rst_gpio); + + non_stop_clocks = of_property_read_bool(pdev->dev.of_node, "non-stop-clocks"); + + if (codec_rst_gpio) + gpiod_set_value(codec_rst_gpio, 1); + msleep(500); + if (codec_rst_gpio) + gpiod_set_value(codec_rst_gpio, 0); + msleep(500); + if (codec_rst_gpio) + gpiod_set_value(codec_rst_gpio, 1); + msleep(500); + + if (i2s_node && codec_node) { + dai->cpus->dai_name = NULL; + dai->cpus->of_node = i2s_node; + dai->platforms->name = NULL; + dai->platforms->of_node = i2s_node; + dai->codecs->name = NULL; + dai->codecs->of_node = codec_node; + } else + if (!i2s_node) { + dev_err(&pdev->dev, + "i2s-controller missing or invalid in DT\n"); + return -EINVAL; + } else { + dev_err(&pdev->dev, + "Property 'codec' missing or invalid\n"); + return -EINVAL; + } + } + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret != 0) + dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); + return ret; +} + +static const struct of_device_id audioinjector_octo_of_match[] = { + { .compatible = "ai,audioinjector-octo-soundcard", }, + {}, +}; +MODULE_DEVICE_TABLE(of, audioinjector_octo_of_match); + +static struct platform_driver audioinjector_octo_driver = { + .driver = { + .name = "audioinjector-octo", + .owner = THIS_MODULE, + .of_match_table = audioinjector_octo_of_match, + }, + .probe = audioinjector_octo_probe, +}; + +module_platform_driver(audioinjector_octo_driver); +MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>"); +MODULE_DESCRIPTION("AudioInjector.net octo Soundcard"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:audioinjector-octo-soundcard"); |