From b7bbdd72e5c9e1b7538b74deb584a7ab0f85847d Mon Sep 17 00:00:00 2001
From: David Knell <david.knell@gmail.com>
Date: Wed, 28 Oct 2020 14:21:37 +0000
Subject: [PATCH] PiFi-40 driver, Makefile and Kconfig
Signed-off-by: David Knell <david.knell@gmail.com>
---
sound/soc/bcm/Kconfig | 8 ++
sound/soc/bcm/Makefile | 3 +
sound/soc/bcm/pifi-40.c | 282 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 293 insertions(+)
create mode 100644 sound/soc/bcm/pifi-40.c
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -91,6 +91,14 @@ config SND_BCM2708_SOC_HIFIBERRY_AMP
help
Say Y or M if you want to add support for the HifiBerry Amp amplifier board.
+ config SND_BCM2708_SOC_PIFI_40
+ tristate "Support for the PiFi-40 amp"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_TAS571X
+ select SND_PIFI_40
+ help
+ Say Y or M if you want to add support for the PiFi40 amp board
+
config SND_BCM2708_SOC_RPI_CIRRUS
tristate "Support for Cirrus Logic Audio Card"
depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -40,6 +40,7 @@ snd-soc-pisound-objs := pisound.o
snd-soc-fe-pi-audio-objs := fe-pi-audio.o
snd-soc-rpi-simple-soundcard-objs := rpi-simple-soundcard.o
snd-soc-rpi-wm8804-soundcard-objs := rpi-wm8804-soundcard.o
+snd-soc-pifi-40-objs := pifi-40.o
obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-codec.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
@@ -69,3 +70,5 @@ obj-$(CONFIG_SND_PISOUND) += snd-soc-pis
obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
obj-$(CONFIG_SND_RPI_SIMPLE_SOUNDCARD) += snd-soc-rpi-simple-soundcard.o
obj-$(CONFIG_SND_RPI_WM8804_SOUNDCARD) += snd-soc-rpi-wm8804-soundcard.o
+obj-$(CONFIG_SND_BCM2708_SOC_PIFI_40) += snd-soc-pifi-40.o
+
--- /dev/null
+++ b/sound/soc/bcm/pifi-40.c
@@ -0,0 +1,282 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ALSA ASoC Machine Driver for PiFi-40
+ *
+ * Author: David Knell <david.knell@gmail.com)
+ * based on code by Daniel Matuschek <info@crazy-audio.com>
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ * Copyright (C) 2020
+ *
+ * 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/platform_device.h>
+#include <linux/gpio/consumer.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <sound/tlv.h>
+
+static struct gpio_desc *pdn_gpio;
+static int vol = 0x30;
+
+// Volume control
+static int pifi_40_vol_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.integer.value[0] = vol;
+ ucontrol->value.integer.value[1] = vol;
+ return 0;
+}
+
+static int pifi_40_vol_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct snd_soc_pcm_runtime *rtd;
+ unsigned int v = ucontrol->value.integer.value[0];
+ struct snd_soc_component *dac[2];
+
+ rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
+ dac[0] = rtd->codec_dais[0]->component;
+ dac[1] = rtd->codec_dais[1]->component;
+
+ snd_soc_component_write(dac[0], 0x07, 255 - v);
+ snd_soc_component_write(dac[1], 0x07, 255 - v);
+
+ vol = v;
+ return 1;
+}
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv_master, -10350, 50, 1);
+static const struct snd_kcontrol_new pifi_40_controls[] = {
+ SOC_DOUBLE_R_EXT_TLV("Master Volume", 0x00, 0x01,
+ 0x00, // Min
+ 0xff, // Max
+ 0x01, // Invert
+ pifi_40_vol_get, pifi_40_vol_set,
+ digital_tlv_master)
+};
+
+static const char * const codec_ctl_pfx[] = { "Left", "Right" };
+
+static const char * const codec_ctl_name[] = { "Master Volume",
+ "Speaker Volume",
+ "Speaker Switch" };
+
+static int snd_pifi_40_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_component *dac[2];
+ struct snd_kcontrol *kctl;
+ int i, j;
+
+ dac[0] = rtd->codec_dais[0]->component;
+ dac[1] = rtd->codec_dais[1]->component;
+
+ // Set up cards - pulse power down first
+ gpiod_set_value_cansleep(pdn_gpio, 1);
+ usleep_range(1000, 10000);
+ gpiod_set_value_cansleep(pdn_gpio, 0);
+ usleep_range(20000, 30000);
+
+ // Oscillator trim
+ snd_soc_component_write(dac[0], 0x1b, 0);
+ snd_soc_component_write(dac[1], 0x1b, 0);
+ usleep_range(60000, 80000);
+
+ // Common setup
+ for (i = 0; i < 2; i++) {
+ // MCLK at 64fs, sample rate 44.1 or 48kHz
+ snd_soc_component_write(dac[i], 0x00, 0x60);
+
+ // Set up for PBTL
+ snd_soc_component_write(dac[i], 0x19, 0x3A);
+ snd_soc_component_write(dac[i], 0x25, 0x01103245);
+
+ // Master vol to -10db
+ snd_soc_component_write(dac[i], 0x07, 0x44);
+ }
+ // Inputs set to L and R respectively
+ snd_soc_component_write(dac[0], 0x20, 0x00017772);
+ snd_soc_component_write(dac[1], 0x20, 0x00107772);
+
+ // Remove codec controls
+ for (i = 0; i < 2; i++) {
+ for (j = 0; j < 3; j++) {
+ char cname[256];
+
+ sprintf(cname, "%s %s", codec_ctl_pfx[i],
+ codec_ctl_name[j]);
+ kctl = snd_soc_card_get_kcontrol(card, cname);
+ if (!kctl) {
+ pr_info("Control %s not found\n",
+ cname);
+ } else {
+ kctl->vd[0].access =
+ SNDRV_CTL_ELEM_ACCESS_READWRITE;
+ snd_ctl_remove(card->snd_card, kctl);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int snd_pifi_40_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ unsigned int sample_bits;
+
+ sample_bits = snd_pcm_format_physical_width(params_format(params));
+ return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
+}
+
+static struct snd_soc_ops snd_pifi_40_ops = { .hw_params =
+ snd_pifi_40_hw_params };
+
+static struct snd_soc_dai_link_component pifi_40_codecs[] = {
+ {
+ .dai_name = "tas571x-hifi",
+ },
+ {
+ .dai_name = "tas571x-hifi",
+ },
+};
+
+SND_SOC_DAILINK_DEFS(
+ pifi_40_dai, DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_CODEC("tas571x.1-001a", "tas571x-hifi"),
+ COMP_CODEC("tas571x.1-001b", "tas571x-hifi")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link snd_pifi_40_dai[] = {
+ {
+ .name = "PiFi40",
+ .stream_name = "PiFi40",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_pifi_40_ops,
+ .init = snd_pifi_40_init,
+ SND_SOC_DAILINK_REG(pifi_40_dai),
+ },
+};
+
+// Machine driver
+static struct snd_soc_card snd_pifi_40 = {
+ .name = "PiFi40",
+ .owner = THIS_MODULE,
+ .dai_link = snd_pifi_40_dai,
+ .num_links = ARRAY_SIZE(snd_pifi_40_dai),
+ .controls = pifi_40_controls,
+ .num_controls = ARRAY_SIZE(pifi_40_controls)
+};
+
+static void snd_pifi_40_pdn(struct snd_soc_card *card, int on)
+{
+ if (pdn_gpio)
+ gpiod_set_value_cansleep(pdn_gpio, on ? 0 : 1);
+}
+
+static int snd_pifi_40_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &snd_pifi_40;
+ int ret = 0, i = 0;
+
+ card->dev = &pdev->dev;
+ platform_set_drvdata(pdev, &snd_pifi_40);
+
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai;
+
+ dai = &snd_pifi_40_dai[0];
+ i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller",
+ 0);
+ if (i2s_node) {
+ for (i = 0; i < card->num_links; i++) {
+ dai->cpus->dai_name = NULL;
+ dai->cpus->of_node = i2s_node;
+ dai->platforms->name = NULL;
+ dai->platforms->of_node = i2s_node;
+ }
+ }
+
+ pifi_40_codecs[0].of_node =
+ of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+ pifi_40_codecs[1].of_node =
+ of_parse_phandle(pdev->dev.of_node, "audio-codec", 1);
+ if (!pifi_40_codecs[0].of_node || !pifi_40_codecs[1].of_node) {
+ dev_err(&pdev->dev,
+ "Property 'audio-codec' missing or invalid\n");
+ return -EINVAL;
+ }
+
+ pdn_gpio = devm_gpiod_get_optional(&pdev->dev, "pdn",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(pdn_gpio)) {
+ ret = PTR_ERR(pdn_gpio);
+ dev_err(&pdev->dev, "failed to get pdn gpio: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = snd_soc_register_card(&snd_pifi_40);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "snd_soc_register_card() failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int snd_pifi_40_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ kfree(&card->drvdata);
+ snd_pifi_40_pdn(&snd_pifi_40, 0);
+ return snd_soc_unregister_card(&snd_pifi_40);
+}
+
+static const struct of_device_id snd_pifi_40_of_match[] = {
+ {
+ .compatible = "pifi,pifi-40",
+ },
+ { /* sentinel */ },
+};
+
+MODULE_DEVICE_TABLE(of, snd_pifi_40_of_match);
+
+static struct platform_driver snd_pifi_40_driver = {
+ .driver = {
+ .name = "snd-pifi-40",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_pifi_40_of_match,
+ },
+ .probe = snd_pifi_40_probe,
+ .remove = snd_pifi_40_remove,
+};
+
+module_platform_driver(snd_pifi_40_driver);
+
+MODULE_AUTHOR("David Knell <david.knell@gmail.com>");
+MODULE_DESCRIPTION("ALSA ASoC Machine Driver for PiFi-40");
+MODULE_LICENSE("GPL v2");