openwrt/target/linux/brcm2708/patches-4.19/950-0423-Added-IQaudIO-Pi-Codec-board-support-2969.patch

From 930c49de8674acda0f143f7bc182ed2fad8c4f9d Mon Sep 17 00:00:00 2001
From: IQaudIO <gordon@iqaudio.com>
Date: Mon, 13 May 2019 21:53:05 +0100
Subject: [PATCH] Added IQaudIO Pi-Codec board support (#2969)

Add support for the IQaudIO Pi-Codec board.

Signed-off-by: Gordon <gordon@iqaudio.com>
---
 arch/arm/boot/dts/overlays/Makefile           |   1 +
 arch/arm/boot/dts/overlays/README             |   6 +
 .../dts/overlays/iqaudio-codec-overlay.dts    |  42 +++
 sound/soc/bcm/Kconfig                         |   7 +
 sound/soc/bcm/Makefile                        |   2 +
 sound/soc/bcm/iqaudio-codec.c                 | 250 ++++++++++++++++++
 9 files changed, 311 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/iqaudio-codec-overlay.dts
 create mode 100644 sound/soc/bcm/iqaudio-codec.c

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -68,6 +68,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	i2c1-bcm2708.dtbo \
 	i2s-gpio28-31.dtbo \
 	ilitek251x.dtbo \
+	iqaudio-codec.dtbo \
 	iqaudio-dac.dtbo \
 	iqaudio-dacplus.dtbo \
 	iqaudio-digi-wm8804-audio.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1160,6 +1160,12 @@ Params: interrupt               GPIO use
                                 touchscreen (in pixels)
 
 
+Name:   iqaudio-codec
+Info:   Configures the IQaudio Codec audio card
+Load:   dtoverlay=iqaudio-codec
+Params: <None>
+
+
 Name:   iqaudio-dac
 Info:   Configures the IQaudio DAC audio card
 Load:   dtoverlay=iqaudio-dac,<param>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/iqaudio-codec-overlay.dts
@@ -0,0 +1,42 @@
+// Definitions for IQaudIO CODEC
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			da2713@1a {
+				#sound-dai-cells = <0>;
+				compatible = "dlg,da7213";
+				reg = <0x1a>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&sound>;
+		iqaudio_dac: __overlay__ {
+			compatible = "iqaudio,iqaudio-codec";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	__overrides__ {
+	};
+};
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -108,6 +108,13 @@ config SND_BCM2708_SOC_JUSTBOOM_DIGI
 	help
 	  Say Y or M if you want to add support for JustBoom Digi.
 
+config SND_BCM2708_SOC_IQAUDIO_CODEC
+	tristate "Support for IQaudIO-CODEC"
+	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+	select SND_SOC_DA7213
+	help
+	  Say Y or M if you want to add support for IQaudIO-CODEC.
+
 config SND_BCM2708_SOC_IQAUDIO_DAC
 	tristate "Support for IQaudIO-DAC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -18,6 +18,7 @@ snd-soc-hifiberry-dacplusadc-objs := hif
 snd-soc-justboom-dac-objs := justboom-dac.o
 snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 snd-soc-rpi-proto-objs := rpi-proto.o
+snd-soc-iqaudio-codec-objs := iqaudio-codec.o
 snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  snd-soc-i-sabre-q2m-objs := i-sabre-q2m.o
 snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
@@ -42,6 +43,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
 obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
+obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_CODEC) += snd-soc-iqaudio-codec.o
 obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
  obj-$(CONFIG_SND_BCM2708_SOC_I_SABRE_Q2M) += snd-soc-i-sabre-q2m.o
 obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
--- /dev/null
+++ b/sound/soc/bcm/iqaudio-codec.c
@@ -0,0 +1,250 @@
+/*
+ * ASoC Driver for IQaudIO Raspberry Pi Codec board
+ *
+ * Author:	Gordon Garrity <gordon@iqaudio.com>
+ *		(C) Copyright IQaudio Limited, 2017-2019
+ *
+ * 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/gpio/consumer.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 <linux/acpi.h>
+#include <linux/slab.h>
+#include "../codecs/da7213.h"
+
+static int pll_out = DA7213_PLL_FREQ_OUT_90316800;
+
+static int snd_rpi_iqaudio_pll_control(struct snd_soc_dapm_widget *w,
+				       struct snd_kcontrol *k, int  event)
+{
+	int ret = 0;
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
+	struct snd_soc_pcm_runtime *rtd =
+		snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+	if (SND_SOC_DAPM_EVENT_OFF(event)) {
+		ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_MCLK, 0,
+					  0);
+		if (ret)
+			dev_err(card->dev, "Failed to bypass PLL: %d\n", ret);
+	} else if (SND_SOC_DAPM_EVENT_ON(event)) {
+		ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0,
+					  pll_out);
+		if (ret)
+			dev_err(card->dev, "Failed to enable PLL: %d\n", ret);
+	}
+
+	return ret;
+}
+
+static int snd_rpi_iqaudio_post_dapm_event(struct snd_soc_dapm_widget *w,
+                              struct snd_kcontrol *kcontrol,
+                              int event)
+{
+     switch (event) {
+     case SND_SOC_DAPM_POST_PMU:
+           /* Delay for mic bias ramp */
+           msleep(1000);
+           break;
+     default:
+           break;
+     }
+
+     return 0;
+}
+
+static const struct snd_soc_dapm_widget dapm_widgets[] = {
+	SND_SOC_DAPM_HP("HP Jack", NULL),
+	SND_SOC_DAPM_MIC("MIC Jack", NULL),
+	SND_SOC_DAPM_MIC("Onboard MIC", NULL),
+	SND_SOC_DAPM_LINE("AUX Jack", NULL),
+	SND_SOC_DAPM_SUPPLY("PLL Control", SND_SOC_NOPM, 0, 0,
+			    snd_rpi_iqaudio_pll_control,
+			    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_POST("Post Power Up Event", snd_rpi_iqaudio_post_dapm_event),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	{"HP Jack", NULL, "HPL"},
+	{"HP Jack", NULL, "HPR"},
+	{"HP Jack", NULL, "PLL Control"},
+
+	{"AUX Jack", NULL, "AUXR"},
+	{"AUX Jack", NULL, "AUXL"},
+	{"AUX Jack", NULL, "PLL Control"},
+
+	/* Assume Mic1 is linked to Headset and Mic2 to on-board mic */
+	{"MIC Jack", NULL, "MIC1"},
+	{"MIC Jack", NULL, "PLL Control"},
+	{"Onboard MIC", NULL, "MIC2"},
+	{"Onboard MIC", NULL, "PLL Control"},
+};
+
+/* machine stream operations */
+
+static int snd_rpi_iqaudio_codec_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret;
+
+	/* Set bclk ratio to align with codec's BCLK rate */
+	ret = snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
+	if (ret) {
+		dev_err(rtd->dev, "Failed to set CPU BLCK ratio\n");
+		return ret;
+	}
+
+	/* Set MCLK frequency to codec, onboard 11.2896MHz clock */
+	return snd_soc_dai_set_sysclk(codec_dai, DA7213_CLKSRC_MCLK, 11289600,
+				      SND_SOC_CLOCK_OUT);
+}
+
+static int snd_rpi_iqaudio_codec_hw_params(struct snd_pcm_substream *substream,
+					   struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	unsigned int samplerate = params_rate(params);
+
+	switch (samplerate) {
+	case  8000:
+	case 16000:
+	case 32000:
+	case 48000:
+	case 96000:
+		pll_out = DA7213_PLL_FREQ_OUT_98304000;
+		return 0;
+	case 44100:
+	case 88200:
+		pll_out = DA7213_PLL_FREQ_OUT_90316800;
+		return 0;
+	default:
+		dev_err(rtd->dev,"Unsupported samplerate %d\n", samplerate);
+		return -EINVAL;
+	}
+}
+
+static const struct snd_soc_ops snd_rpi_iqaudio_codec_ops = {
+	.hw_params = snd_rpi_iqaudio_codec_hw_params,
+};
+
+
+static struct snd_soc_dai_link snd_rpi_iqaudio_codec_dai[] = {
+{
+	.cpu_dai_name 		= "bcm2708-i2s.0",
+	.codec_dai_name 	= "da7213-hifi",
+	.platform_name 		= "bmc2708-i2s.0",
+	.codec_name 		= "da7213.1-001a",
+	.dai_fmt 		= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				  SND_SOC_DAIFMT_CBM_CFM,
+	.init			= snd_rpi_iqaudio_codec_init,
+	.ops			= &snd_rpi_iqaudio_codec_ops,
+	.symmetric_rates	= 1,
+	.symmetric_channels	= 1,
+	.symmetric_samplebits	= 1,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_iqaudio_codec = {
+	.owner			= THIS_MODULE,
+	.dai_link		= snd_rpi_iqaudio_codec_dai,
+	.num_links		= ARRAY_SIZE(snd_rpi_iqaudio_codec_dai),
+	.dapm_widgets		= dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(dapm_widgets),
+	.dapm_routes		= audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(audio_map),
+};
+
+static int snd_rpi_iqaudio_codec_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_iqaudio_codec.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+		struct device_node *i2s_node;
+		struct snd_soc_card *card = &snd_rpi_iqaudio_codec;
+		struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_codec_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;
+		}
+
+		if (of_property_read_string(pdev->dev.of_node, "card_name",
+					    &card->name))
+			card->name = "IQaudIOCODEC";
+
+		if (of_property_read_string(pdev->dev.of_node, "dai_name",
+					    &dai->name))
+			dai->name = "IQaudIO CODEC";
+
+		if (of_property_read_string(pdev->dev.of_node,
+					"dai_stream_name", &dai->stream_name))
+			dai->stream_name = "IQaudIO CODEC HiFi v1.1";
+
+	}
+
+	ret = snd_soc_register_card(&snd_rpi_iqaudio_codec);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"snd_soc_register_card() failed: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int snd_rpi_iqaudio_codec_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_iqaudio_codec);
+}
+
+static const struct of_device_id iqaudio_of_match[] = {
+	{ .compatible = "iqaudio,iqaudio-codec", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, iqaudio_of_match);
+
+static struct platform_driver snd_rpi_iqaudio_codec_driver = {
+	.driver = {
+		.name   = "snd-rpi-iqaudio-codec",
+		.owner  = THIS_MODULE,
+		.of_match_table = iqaudio_of_match,
+	},
+	.probe          = snd_rpi_iqaudio_codec_probe,
+	.remove         = snd_rpi_iqaudio_codec_remove,
+};
+
+
+
+module_platform_driver(snd_rpi_iqaudio_codec_driver);
+
+MODULE_AUTHOR("Gordon Garrity <gordon@iqaudio.com>");
+MODULE_DESCRIPTION("ASoC Driver for IQaudIO CODEC");
+MODULE_LICENSE("GPL v2");