devicetree: Add USB device type

Hardware / Coreboot - Duncan Laurie [google.com] - 11 May 2018 08:59 EDT

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

bae9f85ddb devicetree: Add USB device type
src/device/device_util.c | 11 ++
src/device/root_device.c | 15 +++
src/include/device/device.h | 2 +
src/include/device/path.h | 8 ++
util/sconfig/lex.yy.c_shipped | 240 +++++++++++++++++++------------------
util/sconfig/main.c | 4 +
util/sconfig/sconfig.l | 1 +
util/sconfig/sconfig.tab.c_shipped | 27 +++--
util/sconfig/sconfig.tab.h_shipped | 3 +-
util/sconfig/sconfig.y | 2 +-
10 files changed, 180 insertions(+), 133 deletions(-)

Upstream: review.coreboot.org


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