Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 161 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/sound/max98357a.c b/roms/u-boot/drivers/sound/max98357a.c
new file mode 100644
index 000000000..a2088f030
--- /dev/null
+++ b/roms/u-boot/drivers/sound/max98357a.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * max98357a.c -- MAX98357A Audio driver
+ *
+ * Copyright 2019 Google LLC
+ * Parts taken from coreboot
+ */
+
+#include <common.h>
+#include <audio_codec.h>
+#include <dm.h>
+#include <log.h>
+#include <sound.h>
+#include <acpi/acpigen.h>
+#include <acpi/acpi_device.h>
+#include <acpi/acpi_dp.h>
+#include <asm-generic/gpio.h>
+#ifdef CONFIG_X86
+#include <asm/acpi_nhlt.h>
+#endif
+#include <dt-bindings/sound/nhlt.h>
+#include <dm/acpi.h>
+
+struct max98357a_priv {
+	struct gpio_desc sdmode_gpio;
+};
+
+static int max98357a_of_to_plat(struct udevice *dev)
+{
+	struct max98357a_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = gpio_request_by_name(dev, "sdmode-gpios", 0, &priv->sdmode_gpio,
+				   GPIOD_IS_IN);
+	if (ret)
+		return log_msg_ret("gpio", ret);
+
+	return 0;
+}
+
+static int max98357a_acpi_fill_ssdt(const struct udevice *dev,
+				    struct acpi_ctx *ctx)
+{
+	struct max98357a_priv *priv = dev_get_priv(dev);
+	char scope[ACPI_PATH_MAX];
+	char name[ACPI_NAME_MAX];
+	char path[ACPI_PATH_MAX];
+	struct acpi_dp *dp;
+	int ret;
+
+	ret = acpi_device_scope(dev, scope, sizeof(scope));
+	if (ret)
+		return log_msg_ret("scope", ret);
+	ret = acpi_get_name(dev, name);
+	if (ret)
+		return log_msg_ret("name", ret);
+
+	/* Device */
+	acpigen_write_scope(ctx, scope);
+	acpigen_write_device(ctx, name);
+	acpigen_write_name_string(ctx, "_HID",
+				  dev_read_string(dev, "acpi,hid"));
+	acpigen_write_name_integer(ctx, "_UID", 0);
+	acpigen_write_name_string(ctx, "_DDN",
+				  dev_read_string(dev, "acpi,ddn"));
+	acpigen_write_sta(ctx, acpi_device_status(dev));
+
+	/* Resources */
+	acpigen_write_name(ctx, "_CRS");
+	acpigen_write_resourcetemplate_header(ctx);
+	ret = acpi_device_write_gpio_desc(ctx, &priv->sdmode_gpio);
+	if (ret < 0)
+		return log_msg_ret("gpio", ret);
+	acpigen_write_resourcetemplate_footer(ctx);
+
+	/* _DSD for devicetree properties */
+	/* This points to the first pin in the first gpio entry in _CRS */
+	ret = acpi_device_path(dev, path, sizeof(path));
+	if (ret)
+		return log_msg_ret("path", ret);
+	dp = acpi_dp_new_table("_DSD");
+	acpi_dp_add_gpio(dp, "sdmode-gpio", path, 0, 0,
+			 priv->sdmode_gpio.flags & GPIOD_ACTIVE_LOW ?
+			 ACPI_GPIO_ACTIVE_LOW : ACPI_GPIO_ACTIVE_HIGH);
+	acpi_dp_add_integer(dp, "sdmode-delay",
+			    dev_read_u32_default(dev, "sdmode-delay", 0));
+	acpi_dp_write(ctx, dp);
+
+	acpigen_pop_len(ctx); /* Device */
+	acpigen_pop_len(ctx); /* Scope */
+
+	return 0;
+}
+
+/* For now only X86 boards support NHLT */
+#ifdef CONFIG_X86
+static const struct nhlt_format_config max98357a_formats[] = {
+	/* 48 KHz 24-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 24,
+		.settings_file = "max98357-render-2ch-48khz-24b.dat",
+	},
+};
+
+static const struct nhlt_endp_descriptor max98357a_descriptors[] = {
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_RENDER,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.formats = max98357a_formats,
+		.num_formats = ARRAY_SIZE(max98357a_formats),
+	},
+};
+
+static int max98357a_acpi_setup_nhlt(const struct udevice *dev,
+				     struct acpi_ctx *ctx)
+{
+	u32 hwlink;
+	int ret;
+
+	if (dev_read_u32(dev, "acpi,audio-link", &hwlink))
+		return log_msg_ret("link", -EINVAL);
+
+	/* Virtual bus id of SSP links are the hardware port ids proper. */
+	ret = nhlt_add_ssp_endpoints(ctx->nhlt, hwlink, max98357a_descriptors,
+				     ARRAY_SIZE(max98357a_descriptors));
+	if (ret)
+		return log_msg_ret("add", ret);
+
+	return 0;
+}
+#endif
+
+struct acpi_ops max98357a_acpi_ops = {
+	.fill_ssdt	= max98357a_acpi_fill_ssdt,
+#ifdef CONFIG_X86
+	.setup_nhlt	= max98357a_acpi_setup_nhlt,
+#endif
+};
+
+static const struct audio_codec_ops max98357a_ops = {
+};
+
+static const struct udevice_id max98357a_ids[] = {
+	{ .compatible = "maxim,max98357a" },
+	{ }
+};
+
+U_BOOT_DRIVER(max98357a) = {
+	.name		= "max98357a",
+	.id		= UCLASS_AUDIO_CODEC,
+	.of_match	= max98357a_ids,
+	.of_to_plat	= max98357a_of_to_plat,
+	.ops		= &max98357a_ops,
+	ACPI_OPS_PTR(&max98357a_acpi_ops)
+};