drivers/soundwire/max98373: Support MAX98373 SoundWire device

The MAX98373 smart speaker amp can be connected over SoundWire and be
configured for mainboards to use:

- Data Port 0 and Bulk Register Access is not supported
- Data Port 1 is the 32bit data input for the speaker path
- Data Port 3 is the 16bit data output for I/V sense ADC path

The data port and audio mode properties are filled out as best as
possible with the datasheet as a reference.

The ACPI address for the codec is calculated with the information in
the codec driver combined with the devicetree.cb hierarchy where the
link and unique IDs are extracted from the device path.

For example this device is connected to master link ID 1 and has strap
settings configuring it for unique ID 3.

chip drivers/soundwire/max98373
  register "desc" = ""Left Speaker Amp""
  device generic 1.3 on end
end

This driver was tested with the volteer reference design by booting
and disassembling the runtime SSDT to ensure that the devices have the
expected address and properties.

Device (SW13)
{
    Name (_ADR, 0x000123019F837300)
    Name (_DDN, "Left Speaker Amp")
    Method (_STA)
    {
        Return (0x0F)
    }
    Name (_DSD, Package ()
    {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package () {
            Package () { "mipi-sdw-sw-interface-revision", 0x00010000 },
            [...]
        },
        ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
        Package () {
            Package () { "mipi-sdw-port-audio-mode-0", "MOD0" },
            Package () { "mipi-sdw-dp-1-sink-subproperties", "SNK1" },
            Package () { "mipi-sdw-dp-3-source-subproperties", "SRC3" },
        }
    }
    Name (MOD0, Package ()
    {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package () {
            Package () {
                "mipi-sdw-audio-mode-bus-frequency-configs",
                Package () { 0x00753000, [...] }
            },
            [...]
        }
    }
    Name (SNK1, Package ()
    {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package () {
            Package () { "mipi-sdw-data-port-type", Zero },
            [...]
        },
        ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
        Package () {
            Package () { "mipi-sdw-port-audio-mode-0", "MOD0" }
        }
    }
    Name (SRC3, Package ()
    {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package () {
            Package () { "mipi-sdw-data-port-type", Zero },
            [...]
        },
        ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
        Package () {
            Package () { "mipi-sdw-port-audio-mode-0", "MOD0" }
        }
    }
}

BUG=b:146482091

Signed-off-by: Duncan Laurie <dlaurie@google.com>
Change-Id: I3f8cb2779ddde98c5df739bd8a1e83a12a305c00
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/drivers/soundwire/max98373/chip.h b/src/drivers/soundwire/max98373/chip.h
new file mode 100644
index 0000000000..c263577af5
--- /dev/null
+++ b/src/drivers/soundwire/max98373/chip.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__
+#define __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__
+
+struct drivers_soundwire_max98373_config {
+	const char *name;
+	const char *desc;
+};
+
+#endif /* __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__ */