drivers/sof: Add new driver to generate ACPI _DSD table

Add a new chip driver for boards which use SOF (Sound Open Firmware)
OS drivers, which will be attached to the HDAS device and generate
entries in an ACPI _DSD table for the OS driver to use. This will allow
the OS drivers to easily determine the correct topology for the speaker
and jack amplifiers and correct microphone configuration.

TEST=tested with rest of patch train

Change-Id: Ie0431b2002287f35245cbf959828e931d7f375b2
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74813
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: CoolStar <coolstarorganization@gmail.com>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/src/drivers/sof/sof.c b/src/drivers/sof/sof.c
new file mode 100644
index 0000000000..d11f7300c0
--- /dev/null
+++ b/src/drivers/sof/sof.c
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi_device.h>
+#include <acpi/acpigen.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <string.h>
+
+#include "chip.h"
+
+static const char *get_spkr_tplg_str(unsigned int index)
+{
+	switch (index) {
+		case 1: return "max98373";
+		case 2: return "max98360a";
+		case 3: return "max98357a";
+		case 4: return "max98390";
+		case 5: return "rt1011";
+		case 6: return "rt1015";
+		default: return "default";
+	}
+}
+
+static const char *get_jack_tplg_str(unsigned int index)
+{
+	switch (index) {
+		case 1: return "cs42l42";
+		case 2: return "da7219";
+		case 3: return "nau8825";
+		case 4: return "rt5682";
+		default: return "default";
+	}
+}
+
+static const char *get_mic_tplg_str(unsigned int index)
+{
+	switch (index) {
+		case 1: return "1ch";
+		case 2: return "2ch-pdm0";
+		case 3: return "2ch-pdm1";
+		case 4: return "4ch";
+		default: return "default";
+	}
+}
+
+static void sof_fill_ssdt_generator(const struct device *dev)
+{
+	struct drivers_sof_config *config = dev->chip_info;
+	const char *scope = acpi_device_scope(dev);
+	struct acpi_dp *dsd;
+
+	if (!dev->enabled || !config || !scope)
+		return;
+
+	/* Device */
+	acpigen_write_scope(scope);
+
+	/* DSD */
+	dsd = acpi_dp_new_table("_DSD");
+	acpi_dp_add_string(dsd, "speaker-tplg",
+				get_spkr_tplg_str(config->spkr_tplg));
+	acpi_dp_add_string(dsd, "hp-tplg",
+				get_jack_tplg_str(config->jack_tplg));
+	acpi_dp_add_string(dsd, "mic-tplg",
+				get_mic_tplg_str(config->mic_tplg));
+	acpi_dp_write(dsd);
+	acpigen_pop_len(); /* Scope */
+}
+
+
+static struct device_operations sof_ops = {
+	.read_resources		= noop_read_resources,
+	.set_resources		= noop_set_resources,
+	.acpi_fill_ssdt		= sof_fill_ssdt_generator,
+};
+
+static void sof_enable(struct device *dev)
+{
+	dev->ops = &sof_ops;
+}
+
+struct chip_operations drivers_sof_ops = {
+	CHIP_NAME("SOF")
+	.enable_dev = sof_enable
+};