devicetree: Add USB device type
This commit adds support for describing USB ports in devicetree.cb.
It allows a USB port location to be described in the tree with
configuration information, and ACPI code to be generated that
provides this information to the OS.
A new scan_usb_bus() is added that will scan bridges for devices so
a tree of ports and hubs can be created.
The device address is computed with a 'port type' and a 'port id'
which is flexible for SOC to handle depending on their specific USB
setup and allows USB2 and USB3 ports to be described separately.
For example a board may have devices on two ports, one with a USB2
device and one with a USB3 device, both of which are connected to an
xHCI controller with a root hub:
xHCI
|
RootHub
| |
USB2[0] USB3[2]
device pci 14.0 on
chip drivers/usb/acpi
register "name" = ""Root Hub""
device usb 0.0 on
chip drivers/usb/acpi
register "name" = ""USB 2.0 Port 0""
device usb 2.0 on end
end
chip drivers/usb/acpi
register "name" = ""USB 3.0 Port 2""
device usb 3.2 on end
end
end
end
end
Change-Id: I64e6eba503cdab49be393465b535e139a8c90ef4
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/26169
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 744836d..f3afd60 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -27,6 +27,7 @@
struct smbus_bus_operations;
struct pnp_mode_ops;
struct spi_bus_operations;
+struct usb_bus_operations;
/* Chip operations */
struct chip_operations {
@@ -276,6 +277,7 @@
void scan_generic_bus(struct device *bus);
void scan_static_bus(struct device *bus);
void scan_lpc_bus(struct device *bus);
+void scan_usb_bus(struct device *bus);
#endif /* !defined(__ROMCC__) */