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375 lines
10 KiB
Diff
375 lines
10 KiB
Diff
From 846864bceccdafbed86c1b1766500861547b0da9 Mon Sep 17 00:00:00 2001
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From: Matt Flax <flatmax@flatmax.org>
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Date: Wed, 8 Mar 2017 20:04:13 +1100
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Subject: [PATCH] Add support for the AudioInjector.net Octo sound card
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AudioInjector Octo: sample rates, regulators, reset
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This patch adds new sample rates to the Audioinjector Octo sound card. The
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new supported rates are (in kHz) :
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96, 48, 32, 24, 16, 8, 88.2, 44.1, 29.4, 22.05, 14.7
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Reference the bcm270x DT regulators in the overlay.
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This patch adds a reset GPIO for the AudioInjector.net octo sound card.
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Audioinjector octo : Make the playback and capture symmetric
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This patch ensures that the sample rate and channel count of the audioinjector
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octo sound card are symmetric.
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audioinjector-octo: Add continuous clock feature
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By user request, add a switch to prevent the clocks being stopped when
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the stream is paused, stopped or shutdown. Provide access to the switch
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by adding a 'non-stop-clocks' parameter to the audioinjector-addons
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overlay.
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See: https://github.com/raspberrypi/linux/issues/2409
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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sound/soc/bcm/audioinjector-octo-soundcard.c | 336 +++++++++++++++++++
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1 file changed, 336 insertions(+)
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create mode 100644 sound/soc/bcm/audioinjector-octo-soundcard.c
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--- /dev/null
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+++ b/sound/soc/bcm/audioinjector-octo-soundcard.c
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@@ -0,0 +1,336 @@
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+/*
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+ * ASoC Driver for AudioInjector Pi octo channel soundcard (hat)
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+ *
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+ * Created on: 27-October-2016
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+ * Author: flatmax@flatmax.org
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+ * based on audioinjector-pi-soundcard.c
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+ *
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+ * Copyright (C) 2016 Flatmax Pty. Ltd.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/gpio/consumer.h>
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+
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+#include <sound/core.h>
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+#include <sound/soc.h>
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+#include <sound/pcm_params.h>
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+#include <sound/control.h>
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+
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+static struct gpio_descs *mult_gpios;
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+static struct gpio_desc *codec_rst_gpio;
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+static unsigned int audioinjector_octo_rate;
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+static bool non_stop_clocks;
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+
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+static const unsigned int audioinjector_octo_rates[] = {
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+ 96000, 48000, 32000, 24000, 16000, 8000, 88200, 44100, 29400, 22050, 14700,
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+};
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+
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+static struct snd_pcm_hw_constraint_list audioinjector_octo_constraints = {
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+ .list = audioinjector_octo_rates,
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+ .count = ARRAY_SIZE(audioinjector_octo_rates),
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+};
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+
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+static int audioinjector_octo_dai_init(struct snd_soc_pcm_runtime *rtd)
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+{
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+ return snd_soc_dai_set_bclk_ratio(rtd->cpu_dai, 64);
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+}
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+
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+static int audioinjector_octo_startup(struct snd_pcm_substream *substream)
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+{
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+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+ rtd->cpu_dai->driver->playback.channels_min = 8;
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+ rtd->cpu_dai->driver->playback.channels_max = 8;
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+ rtd->cpu_dai->driver->capture.channels_min = 8;
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+ rtd->cpu_dai->driver->capture.channels_max = 8;
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+ rtd->codec_dai->driver->capture.channels_max = 8;
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+
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+ snd_pcm_hw_constraint_list(substream->runtime, 0,
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+ SNDRV_PCM_HW_PARAM_RATE,
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+ &audioinjector_octo_constraints);
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+
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+ return 0;
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+}
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+
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+static void audioinjector_octo_shutdown(struct snd_pcm_substream *substream)
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+{
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+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+ rtd->cpu_dai->driver->playback.channels_min = 2;
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+ rtd->cpu_dai->driver->playback.channels_max = 2;
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+ rtd->cpu_dai->driver->capture.channels_min = 2;
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+ rtd->cpu_dai->driver->capture.channels_max = 2;
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+ rtd->codec_dai->driver->capture.channels_max = 6;
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+}
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+
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+static int audioinjector_octo_hw_params(struct snd_pcm_substream *substream,
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+ struct snd_pcm_hw_params *params)
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+{
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+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+
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+ // set codec DAI configuration
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+ int ret = snd_soc_dai_set_fmt(rtd->codec_dai,
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+ SND_SOC_DAIFMT_CBS_CFS|SND_SOC_DAIFMT_DSP_A|
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+ SND_SOC_DAIFMT_NB_NF);
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+ if (ret < 0)
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+ return ret;
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+
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+ // set cpu DAI configuration
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+ ret = snd_soc_dai_set_fmt(rtd->cpu_dai,
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+ SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|
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+ SND_SOC_DAIFMT_NB_NF);
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+ if (ret < 0)
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+ return ret;
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+
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+ audioinjector_octo_rate = params_rate(params);
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+
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+ // Set the correct sysclock for the codec
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+ switch (audioinjector_octo_rate) {
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+ case 96000:
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+ case 48000:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 49152000,
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+ 0);
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+ break;
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+ case 24000:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 49152000/2,
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+ 0);
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+ break;
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+ case 32000:
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+ case 16000:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 49152000/3,
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+ 0);
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+ break;
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+ case 8000:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 49152000/6,
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+ 0);
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+ break;
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+ case 88200:
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+ case 44100:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 45185400,
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+ 0);
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+ break;
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+ case 22050:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 45185400/2,
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+ 0);
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+ break;
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+ case 29400:
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+ case 14700:
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 45185400/3,
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+ 0);
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+}
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+
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+static int audioinjector_octo_trigger(struct snd_pcm_substream *substream,
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+ int cmd){
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+ int mult[4];
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+
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+ memset(mult, 0, sizeof(mult));
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+
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+ switch (cmd) {
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+ case SNDRV_PCM_TRIGGER_STOP:
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+ case SNDRV_PCM_TRIGGER_SUSPEND:
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+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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+ if (!non_stop_clocks)
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+ break;
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+ /* Drop through... */
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+ case SNDRV_PCM_TRIGGER_START:
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+ case SNDRV_PCM_TRIGGER_RESUME:
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+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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+ switch (audioinjector_octo_rate) {
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+ case 96000:
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+ mult[3] = 1;
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+ case 88200:
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+ mult[1] = 1;
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+ mult[2] = 1;
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+ break;
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+ case 48000:
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+ mult[3] = 1;
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+ case 44100:
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+ mult[2] = 1;
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+ break;
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+ case 32000:
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+ mult[3] = 1;
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+ case 29400:
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+ mult[0] = 1;
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+ mult[1] = 1;
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+ break;
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+ case 24000:
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+ mult[3] = 1;
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+ case 22050:
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+ mult[1] = 1;
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+ break;
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+ case 16000:
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+ mult[3] = 1;
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+ case 14700:
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+ mult[0] = 1;
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+ break;
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+ case 8000:
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+ mult[3] = 1;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+ gpiod_set_array_value_cansleep(mult_gpios->ndescs, mult_gpios->desc,
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+ mult);
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+
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+ return 0;
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+}
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+
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+static struct snd_soc_ops audioinjector_octo_ops = {
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+ .startup = audioinjector_octo_startup,
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+ .shutdown = audioinjector_octo_shutdown,
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+ .hw_params = audioinjector_octo_hw_params,
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+ .trigger = audioinjector_octo_trigger,
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+};
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+
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+static struct snd_soc_dai_link audioinjector_octo_dai[] = {
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+ {
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+ .name = "AudioInjector Octo",
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+ .stream_name = "AudioInject-HIFI",
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+ .codec_dai_name = "cs42448",
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+ .ops = &audioinjector_octo_ops,
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+ .init = audioinjector_octo_dai_init,
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+ .symmetric_rates = 1,
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+ .symmetric_channels = 1,
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+ },
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+};
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+
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+static const struct snd_soc_dapm_widget audioinjector_octo_widgets[] = {
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+ SND_SOC_DAPM_OUTPUT("OUTPUTS0"),
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+ SND_SOC_DAPM_OUTPUT("OUTPUTS1"),
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+ SND_SOC_DAPM_OUTPUT("OUTPUTS2"),
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+ SND_SOC_DAPM_OUTPUT("OUTPUTS3"),
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+ SND_SOC_DAPM_INPUT("INPUTS0"),
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+ SND_SOC_DAPM_INPUT("INPUTS1"),
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+ SND_SOC_DAPM_INPUT("INPUTS2"),
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+};
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+
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+static const struct snd_soc_dapm_route audioinjector_octo_route[] = {
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+ /* Balanced outputs */
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+ {"OUTPUTS0", NULL, "AOUT1L"},
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+ {"OUTPUTS0", NULL, "AOUT1R"},
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+ {"OUTPUTS1", NULL, "AOUT2L"},
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+ {"OUTPUTS1", NULL, "AOUT2R"},
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+ {"OUTPUTS2", NULL, "AOUT3L"},
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+ {"OUTPUTS2", NULL, "AOUT3R"},
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+ {"OUTPUTS3", NULL, "AOUT4L"},
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+ {"OUTPUTS3", NULL, "AOUT4R"},
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+
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+ /* Balanced inputs */
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+ {"AIN1L", NULL, "INPUTS0"},
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+ {"AIN1R", NULL, "INPUTS0"},
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+ {"AIN2L", NULL, "INPUTS1"},
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+ {"AIN2R", NULL, "INPUTS1"},
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+ {"AIN3L", NULL, "INPUTS2"},
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+ {"AIN3R", NULL, "INPUTS2"},
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+};
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+
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+static struct snd_soc_card snd_soc_audioinjector_octo = {
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+ .name = "audioinjector-octo-soundcard",
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+ .dai_link = audioinjector_octo_dai,
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+ .num_links = ARRAY_SIZE(audioinjector_octo_dai),
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+
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+ .dapm_widgets = audioinjector_octo_widgets,
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+ .num_dapm_widgets = ARRAY_SIZE(audioinjector_octo_widgets),
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+ .dapm_routes = audioinjector_octo_route,
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+ .num_dapm_routes = ARRAY_SIZE(audioinjector_octo_route),
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+};
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+
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+static int audioinjector_octo_probe(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = &snd_soc_audioinjector_octo;
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+ int ret;
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+
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+ card->dev = &pdev->dev;
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+
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+ if (pdev->dev.of_node) {
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+ struct snd_soc_dai_link *dai = &audioinjector_octo_dai[0];
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+ struct device_node *i2s_node =
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+ of_parse_phandle(pdev->dev.of_node,
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+ "i2s-controller", 0);
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+ struct device_node *codec_node =
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+ of_parse_phandle(pdev->dev.of_node,
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+ "codec", 0);
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+
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+ mult_gpios = devm_gpiod_get_array_optional(&pdev->dev, "mult",
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+ GPIOD_OUT_LOW);
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+ if (IS_ERR(mult_gpios))
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+ return PTR_ERR(mult_gpios);
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+
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+ codec_rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",
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+ GPIOD_OUT_LOW);
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+ if (IS_ERR(codec_rst_gpio))
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+ return PTR_ERR(codec_rst_gpio);
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+
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+ non_stop_clocks = of_property_read_bool(pdev->dev.of_node, "non-stop-clocks");
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+
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+ if (codec_rst_gpio)
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+ gpiod_set_value(codec_rst_gpio, 1);
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+ msleep(500);
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+ if (codec_rst_gpio)
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+ gpiod_set_value(codec_rst_gpio, 0);
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+ msleep(500);
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+ if (codec_rst_gpio)
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+ gpiod_set_value(codec_rst_gpio, 1);
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+ msleep(500);
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+
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+ if (i2s_node && codec_node) {
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+ dai->cpu_dai_name = NULL;
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+ dai->cpu_of_node = i2s_node;
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+ dai->platform_name = NULL;
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+ dai->platform_of_node = i2s_node;
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+ dai->codec_name = NULL;
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+ dai->codec_of_node = codec_node;
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+ } else
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+ if (!dai->cpu_of_node) {
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+ dev_err(&pdev->dev,
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+ "i2s-controller missing or invalid in DT\n");
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+ return -EINVAL;
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+ } else {
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+ dev_err(&pdev->dev,
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+ "Property 'codec' missing or invalid\n");
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+ return -EINVAL;
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+ }
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+ }
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+
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+ ret = devm_snd_soc_register_card(&pdev->dev, card);
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+ if (ret != 0)
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+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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+ return ret;
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+}
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+
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+static const struct of_device_id audioinjector_octo_of_match[] = {
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+ { .compatible = "ai,audioinjector-octo-soundcard", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, audioinjector_octo_of_match);
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+
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+static struct platform_driver audioinjector_octo_driver = {
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+ .driver = {
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+ .name = "audioinjector-octo",
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+ .owner = THIS_MODULE,
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+ .of_match_table = audioinjector_octo_of_match,
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+ },
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+ .probe = audioinjector_octo_probe,
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+};
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+
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+module_platform_driver(audioinjector_octo_driver);
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+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
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+MODULE_DESCRIPTION("AudioInjector.net octo Soundcard");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("platform:audioinjector-octo-soundcard");
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