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openwrtv3/target/linux/brcm2708/patches-4.9/950-0076-RaspiDAC3-support.patch
Rafał Miłecki fce21ae4cc brcm2708: rename all patches from raspberrypi git tree to use 950 prefix 
Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
2017-03-24 08:06:35 +01:00

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From b545537294ffc7e21fcc5e0c78ea8ac20c9ecd3f Mon Sep 17 00:00:00 2001
From: Jan Grulich <jan@grulich.eu>
Date: Mon, 24 Aug 2015 16:03:47 +0100
Subject: [PATCH] RaspiDAC3 support
Signed-off-by: Jan Grulich <jan@grulich.eu>
config: fix RaspiDAC Rev.3x dependencies
Change depends to SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
like the other I2S soundcard drivers.
Signed-off-by: Matthias Reichl <hias@horus.com>
---
sound/soc/bcm/Kconfig | 8 ++
sound/soc/bcm/Makefile | 2 +
sound/soc/bcm/raspidac3.c | 186 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 196 insertions(+)
create mode 100644 sound/soc/bcm/raspidac3.c
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -65,3 +65,11 @@ config SND_BCM2708_SOC_IQAUDIO_DAC
select SND_SOC_PCM512x_I2C
help
Say Y or M if you want to add support for IQaudIO-DAC.
+
+config SND_BCM2708_SOC_RASPIDAC3
+ tristate "Support for RaspiDAC Rev.3x"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_PCM512x_I2C
+ select SND_SOC_TPA6130A2
+ help
+ Say Y or M if you want to add support for RaspiDAC Rev.3x.
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -16,6 +16,7 @@ snd-soc-hifiberry-digi-objs := hifiberry
snd-soc-rpi-dac-objs := rpi-dac.o
snd-soc-rpi-proto-objs := rpi-proto.o
snd-soc-iqaudio-dac-objs := iqaudio-dac.o
+snd-soc-raspidac3-objs := raspidac3.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
@@ -24,3 +25,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
+obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
--- /dev/null
+++ b/sound/soc/bcm/raspidac3.c
@@ -0,0 +1,186 @@
+/*
+ * ASoC Driver for RaspiDAC v3
+ *
+ * Author: Jan Grulich <jan@grulich.eu>
+ * Copyright 2015
+ * based on code by Daniel Matuschek <daniel@hifiberry.com>
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ *
+ * 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/soc-dapm.h>
+
+#include "../codecs/pcm512x.h"
+#include "../codecs/tpa6130a2.h"
+
+/* sound card init */
+static int snd_rpi_raspidac3_init(struct snd_soc_pcm_runtime *rtd)
+{
+ int ret;
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_codec *codec = rtd->codec;
+ snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
+ snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
+
+ 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);
+ else {
+ struct snd_kcontrol *kctl;
+
+ ret = snd_soc_limit_volume(card,
+ "TPA6130A2 Headphone Playback Volume",
+ 54);
+ if (ret < 0)
+ dev_warn(card->dev, "Failed to set TPA6130A2 volume limit: %d\n",
+ ret);
+ kctl = snd_soc_card_get_kcontrol(card,
+ "TPA6130A2 Headphone Playback Volume");
+ if (kctl) {
+ strcpy(kctl->id.name, "Headphones Playback Volume");
+ /* disable the volume dB scale so alsamixer works */
+ kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
+ }
+
+ kctl = snd_soc_card_get_kcontrol(card,
+ "TPA6130A2 Headphone Playback Switch");
+ if (kctl)
+ strcpy(kctl->id.name, "Headphones Playback Switch");
+ }
+
+ return 0;
+}
+
+/* set hw parameters */
+static int snd_rpi_raspidac3_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 =
+ snd_pcm_format_physical_width(params_format(params));
+
+ return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
+}
+
+/* startup */
+static int snd_rpi_raspidac3_startup(struct snd_pcm_substream *substream) {
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec *codec = rtd->codec;
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
+ return 0;
+}
+
+/* shutdown */
+static void snd_rpi_raspidac3_shutdown(struct snd_pcm_substream *substream) {
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec *codec = rtd->codec;
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_raspidac3_ops = {
+ .hw_params = snd_rpi_raspidac3_hw_params,
+ .startup = snd_rpi_raspidac3_startup,
+ .shutdown = snd_rpi_raspidac3_shutdown,
+};
+
+/* interface setup */
+static struct snd_soc_dai_link snd_rpi_raspidac3_dai[] = {
+{
+ .name = "RaspiDAC Rev.3x",
+ .stream_name = "RaspiDAC HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "pcm512x-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "pcm512x.1-004c",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_rpi_raspidac3_ops,
+ .init = snd_rpi_raspidac3_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_raspidac3 = {
+ .name = "RaspiDAC Rev.3x HiFi Audio Card",
+ .owner = THIS_MODULE,
+ .dai_link = snd_rpi_raspidac3_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_raspidac3_dai),
+};
+
+/* sound card test */
+static int snd_rpi_raspidac3_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_rpi_raspidac3.dev = &pdev->dev;
+
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai = &snd_rpi_raspidac3_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;
+ }
+ }
+
+ ret = snd_soc_register_card(&snd_rpi_raspidac3);
+ if (ret)
+ dev_err(&pdev->dev,
+ "snd_soc_register_card() failed: %d\n", ret);
+
+ return ret;
+}
+
+/* sound card disconnect */
+static int snd_rpi_raspidac3_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&snd_rpi_raspidac3);
+}
+
+static const struct of_device_id raspidac3_of_match[] = {
+ { .compatible = "jg,raspidacv3", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, raspidac3_of_match);
+
+/* sound card platform driver */
+static struct platform_driver snd_rpi_raspidac3_driver = {
+ .driver = {
+ .name = "snd-rpi-raspidac3",
+ .owner = THIS_MODULE,
+ .of_match_table = raspidac3_of_match,
+ },
+ .probe = snd_rpi_raspidac3_probe,
+ .remove = snd_rpi_raspidac3_remove,
+};
+
+module_platform_driver(snd_rpi_raspidac3_driver);
+
+MODULE_AUTHOR("Jan Grulich <jan@grulich.eu>");
+MODULE_DESCRIPTION("ASoC Driver for RaspiDAC Rev.3x");
+MODULE_LICENSE("GPL v2");
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