--- /dev/null
+/*
+ * 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 unsigned int audioinjector_octo_rate;
+
+static int audioinjector_octo_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ return snd_soc_dai_set_bclk_ratio(rtd->cpu_dai, 64);
+}
+
+static int audioinjector_octo_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ rtd->cpu_dai->driver->playback.channels_min = 8;
+ rtd->cpu_dai->driver->playback.channels_max = 8;
+ rtd->cpu_dai->driver->capture.channels_min = 8;
+ rtd->cpu_dai->driver->capture.channels_max = 8;
+ rtd->codec_dai->driver->capture.channels_max = 8;
+ return 0;
+}
+
+static void audioinjector_octo_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ rtd->cpu_dai->driver->playback.channels_min = 2;
+ rtd->cpu_dai->driver->playback.channels_max = 2;
+ rtd->cpu_dai->driver->capture.channels_min = 2;
+ rtd->cpu_dai->driver->capture.channels_max = 2;
+ rtd->codec_dai->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(rtd->codec_dai,
+ 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(rtd->cpu_dai,
+ 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);
+
+ return 0;
+}
+
+static int audioinjector_octo_trigger(struct snd_pcm_substream *substream,
+ int cmd){
+ int mult[4];
+ mult[0] = 0;
+ mult[1] = 0;
+ mult[2] = 0;
+ mult[3] = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ switch (audioinjector_octo_rate) {
+ case 192000:
+ mult[3] = 1;
+ case 176640:
+ mult[0] = 1;
+ mult[1] = 1;
+ mult[2] = 1;
+ break;
+ case 96000:
+ mult[3] = 1;
+ case 88200:
+ mult[1] = 1;
+ mult[2] = 1;
+ break;
+ case 64000:
+ mult[3] = 1;
+ case 58800:
+ mult[0] = 1;
+ mult[2] = 1;
+ break;
+ case 48000:
+ mult[3] = 1;
+ case 44100:
+ mult[2] = 1;
+ break;
+ case 32000:
+ mult[3] = 1;
+ case 29400:
+ mult[0] = 1;
+ mult[1] = 1;
+ break;
+ case 24000:
+ mult[3] = 1;
+ case 22050:
+ mult[1] = 1;
+ break;
+ case 16000:
+ mult[3] = 1;
+ case 14700:
+ mult[0] = 1;
+ break;
+ case 8000:
+ mult[3] = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ break;
+ default:
+ return -EINVAL;
+ }
+ gpiod_set_array_value_cansleep(mult_gpios->ndescs, mult_gpios->desc,
+ 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,
+};
+
+static struct snd_soc_dai_link audioinjector_octo_dai[] = {
+ {
+ .name = "AudioInjector Octo",
+ .stream_name = "AudioInject-HIFI",
+ .codec_dai_name = "cs42448",
+ .ops = &audioinjector_octo_ops,
+ .init = audioinjector_octo_dai_init,
+ },
+};
+
+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);
+
+ if (i2s_node && codec_node) {
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+ dai->codec_name = NULL;
+ dai->codec_of_node = codec_node;
+ } else
+ if (!dai->cpu_of_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 = snd_soc_register_card(card);
+ if (ret != 0)
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ return ret;
+}
+
+static int audioinjector_octo_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ return snd_soc_unregister_card(card);
+}
+
+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-audio",
+ .owner = THIS_MODULE,
+ .of_match_table = audioinjector_octo_of_match,
+ },
+ .probe = audioinjector_octo_probe,
+ .remove = audioinjector_octo_remove,
+};
+
+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");
projects / mirror_ubuntu-zesty-kernel.git / commitdiff