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acpi/device: Add a helper function to write SoundWire _ADR 

This change adds a help function to write a SoundWire ACPI address
object that conforms to the SoundWire DisCo Specification Version 1.0

The SoundWire address structure is defined in include/device/soundwire.h
and provides the properties that are used to form the _ADR object.

BUG=b:146482091

Signed-off-by: Duncan Laurie <dlaurie@google.com>
Change-Id: I6efbf52ce20b53f96d69efe2bf004b98dbe06552
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40885
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Duncan Laurie 2020-04-29 12:13:14 -07:00 committed by Duncan Laurie
parent e8189b7426
commit 08a942fd32
2 changed files with 30 additions and 0 deletions
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28
src/acpi/acpigen.c
View File

@ -18,6 +18,7 @@
#include <device/device.h>
#include <device/pci_def.h>
#include <device/pci_type.h>
#include <device/soundwire.h>
static char *gencurrent;
@ -1885,3 +1886,30 @@ void acpigen_write_ADR_pci_device(const struct device *dev)
assert(dev->path.type == DEVICE_PATH_PCI);
acpigen_write_ADR_pci_devfn(dev->path.pci.devfn);
}
/**
* acpigen_write_ADR_soundwire_device() - SoundWire ACPI Device Address Encoding.
* @address: SoundWire device address properties.
*
* From SoundWire Discovery and Configuration Specification Version 1.0 Table 3.
*
* 63..52 - Reserved (0)
* 51..48 - Zero-based SoundWire Link ID, relative to the immediate parent.
* Used when a Controller has multiple master devices, each producing a
* separate SoundWire Link. Set to 0 for single-link controllers.
* 47..0 - SoundWire Device ID Encoding from specification version 1.2 table 88
* 47..44 - SoundWire specification version that this device supports
* 43..40 - Unique ID for multiple devices
* 39..24 - MIPI standard manufacturer code
* 23..08 - Vendor defined part ID
* 07..00 - MIPI class encoding
*/
void acpigen_write_ADR_soundwire_device(const struct soundwire_address *address)
{
acpigen_write_ADR((((uint64_t)address->link_id & 0xf) << 48) |
(((uint64_t)address->version & 0xf) << 44) |
(((uint64_t)address->unique_id & 0xf) << 40) |
(((uint64_t)address->manufacturer_id & 0xffff) << 24) |
(((uint64_t)address->part_id & 0xffff) << 8) |
(((uint64_t)address->class & 0xff)));
}

2
src/include/acpi/acpigen.h
View File

@ -374,6 +374,8 @@ void acpigen_write_pld(const struct acpi_pld *pld);
void acpigen_write_ADR(uint64_t adr);
void acpigen_write_ADR_pci_devfn(pci_devfn_t devfn);
void acpigen_write_ADR_pci_device(const struct device *dev);
struct soundwire_address;
void acpigen_write_ADR_soundwire_device(const struct soundwire_address *address);
/*
* Generate ACPI AML code for _DSM method.
* This function takes as input uuid for the device, set of callbacks and