openwrt/target/linux/bcm27xx/patches-6.1/950-1276-Impliment-driver-support-for-Interlude-Audio-Digital.patch

From fb21611efd7cd916646d9ab2988c3af08f139761 Mon Sep 17 00:00:00 2001
From: Ben Payne <ben@bluerocksoft.com>
Date: Tue, 13 Feb 2024 14:55:14 -0800
Subject: [PATCH 1276/1295] Impliment driver support for Interlude Audio
 Digital Hat

Implementing driver support for
Interlude audio's WM8805 based digital hat
by leveraging existing drivers
---
 sound/soc/bcm/rpi-wm8804-soundcard.c | 139 +++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)

--- a/sound/soc/bcm/rpi-wm8804-soundcard.c
+++ b/sound/soc/bcm/rpi-wm8804-soundcard.c
@@ -34,6 +34,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
+#include <linux/delay.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -65,6 +66,10 @@ struct snd_rpi_wm8804_drvdata {
 static struct gpio_desc *snd_clk44gpio;
 static struct gpio_desc *snd_clk48gpio;
 static int wm8804_samplerate = 0;
+static struct gpio_desc *led_gpio_1;
+static struct gpio_desc *led_gpio_2;
+static struct gpio_desc *led_gpio_3;
+static struct gpio_desc *custom_reset;
 
 /* Forward declarations */
 static struct snd_soc_dai_link snd_allo_digione_dai[];
@@ -74,6 +79,37 @@ static struct snd_soc_card snd_rpi_wm880
 #define CLK_44EN_RATE 22579200UL
 #define CLK_48EN_RATE 24576000UL
 
+static const char * const wm8805_input_select_text[] = {
+	"Rx 0",
+	"Rx 1",
+	"Rx 2",
+	"Rx 3",
+	"Rx 4",
+	"Rx 5",
+	"Rx 6",
+	"Rx 7"
+};
+
+static const unsigned int wm8805_input_channel_select_value[] = {
+	0, 1, 2, 3, 4, 5, 6, 7
+};
+
+static const struct soc_enum wm8805_input_channel_sel[] = {
+	SOC_VALUE_ENUM_SINGLE(WM8804_PLL6, 0, 7, ARRAY_SIZE(wm8805_input_select_text),
+	wm8805_input_select_text, wm8805_input_channel_select_value),
+};
+
+static const struct snd_kcontrol_new wm8805_input_controls_card[] = {
+	SOC_ENUM("Select Input Channel", wm8805_input_channel_sel[0]),
+};
+
+static int wm8805_add_input_controls(struct snd_soc_component *component)
+{
+	snd_soc_add_component_controls(component, wm8805_input_controls_card,
+	ARRAY_SIZE(wm8805_input_controls_card));
+	return 0;
+}
+
 static unsigned int snd_rpi_wm8804_enable_clock(unsigned int samplerate)
 {
 	switch (samplerate) {
@@ -187,6 +223,53 @@ static struct snd_soc_ops snd_rpi_wm8804
 	.hw_params = snd_rpi_wm8804_hw_params,
 };
 
+static int snd_interlude_audio_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params)
+{
+	int ret = snd_rpi_wm8804_hw_params(substream, params);
+	int samplerate = params_rate(params);
+
+	switch (samplerate) {
+	case 44100:
+		gpiod_set_value_cansleep(led_gpio_1, 1);
+		gpiod_set_value_cansleep(led_gpio_2, 0);
+		gpiod_set_value_cansleep(led_gpio_3, 0);
+		break;
+	case 48000:
+		gpiod_set_value_cansleep(led_gpio_1, 1);
+		gpiod_set_value_cansleep(led_gpio_2, 0);
+		gpiod_set_value_cansleep(led_gpio_3, 0);
+		break;
+	case 88200:
+		gpiod_set_value_cansleep(led_gpio_1, 0);
+		gpiod_set_value_cansleep(led_gpio_2, 1);
+		gpiod_set_value_cansleep(led_gpio_3, 0);
+		break;
+	case 96000:
+		gpiod_set_value_cansleep(led_gpio_1, 0);
+		gpiod_set_value_cansleep(led_gpio_2, 1);
+		gpiod_set_value_cansleep(led_gpio_3, 0);
+		break;
+	case 176400:
+		gpiod_set_value_cansleep(led_gpio_1, 0);
+		gpiod_set_value_cansleep(led_gpio_2, 0);
+		gpiod_set_value_cansleep(led_gpio_3, 1);
+		break;
+	case 192000:
+		gpiod_set_value_cansleep(led_gpio_1, 0);
+		gpiod_set_value_cansleep(led_gpio_2, 0);
+		gpiod_set_value_cansleep(led_gpio_3, 1);
+		break;
+	default:
+		break;
+	}
+	return ret;
+}
+
+const struct snd_soc_ops interlude_audio_digital_dai_ops = {
+	.hw_params = snd_interlude_audio_hw_params,
+};
+
 SND_SOC_DAILINK_DEFS(justboom_digi,
 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
@@ -287,6 +370,60 @@ static struct snd_rpi_wm8804_drvdata drv
 	.probe     = snd_hifiberry_digi_probe,
 };
 
+SND_SOC_DAILINK_DEFS(interlude_audio_digital,
+	DAILINK_COMP_ARRAY(COMP_EMPTY()),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static int snd_interlude_audio_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
+	int ret;
+
+	ret = wm8805_add_input_controls(component);
+	if (ret != 0)
+		pr_err("failed to add input controls");
+
+	return 0;
+}
+
+
+static struct snd_soc_dai_link snd_interlude_audio_digital_dai[] = {
+{
+	.name        = "Interlude Audio Digital",
+	.stream_name = "Interlude Audio Digital HiFi",
+	.init        = snd_interlude_audio_init,
+	.ops		 = &interlude_audio_digital_dai_ops,
+	SND_SOC_DAILINK_REG(interlude_audio_digital),
+},
+};
+
+
+static int snd_interlude_audio_digital_probe(struct platform_device *pdev)
+{
+	if (IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio))
+		return 0;
+
+	custom_reset = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
+	gpiod_set_value_cansleep(custom_reset, 0);
+	mdelay(10);
+	gpiod_set_value_cansleep(custom_reset, 1);
+
+	snd_interlude_audio_digital_dai->name = "Interlude Audio Digital";
+	snd_interlude_audio_digital_dai->stream_name = "Interlude Audio Digital HiFi";
+	led_gpio_1 = devm_gpiod_get(&pdev->dev, "led1", GPIOD_OUT_LOW);
+	led_gpio_2 = devm_gpiod_get(&pdev->dev, "led2", GPIOD_OUT_LOW);
+	led_gpio_3 = devm_gpiod_get(&pdev->dev, "led3", GPIOD_OUT_LOW);
+	return 0;
+}
+
+
+static struct snd_rpi_wm8804_drvdata drvdata_interlude_audio_digital = {
+	.card_name = "snd_IA_Digital_Hat",
+	.dai       = snd_interlude_audio_digital_dai,
+	.probe     = snd_interlude_audio_digital_probe,
+};
+
 static const struct of_device_id snd_rpi_wm8804_of_match[] = {
 	{ .compatible = "justboom,justboom-digi",
 		.data = (void *) &drvdata_justboom_digi },
@@ -296,6 +433,8 @@ static const struct of_device_id snd_rpi
 		.data = (void *) &drvdata_allo_digione },
 	{ .compatible = "hifiberry,hifiberry-digi",
 		.data = (void *) &drvdata_hifiberry_digi },
+	{ .compatible = "interludeaudio,interludeaudio-digital",
+		.data = (void *) &drvdata_interlude_audio_digital },
 	{},
 };