From bae9f85ddbd2e62af1b47169cbfeb10b06d45e04 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Mon, 7 May 2018 14:18:13 -0700 Subject: 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 Reviewed-on: https://review.coreboot.org/26169 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/device/root_device.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'src/device/root_device.c') diff --git a/src/device/root_device.c b/src/device/root_device.c index a19028d43d..b0b6712ebb 100644 --- a/src/device/root_device.c +++ b/src/device/root_device.c @@ -72,6 +72,21 @@ void scan_lpc_bus(struct device *bus) printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus)); } +void scan_usb_bus(struct device *bus) +{ + struct bus *link; + + printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus)); + + scan_static_bus(bus); + + /* Scan bridges in case this device is a hub */ + for (link = bus->link_list; link; link = link->next) + scan_bridges(link); + + printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus)); +} + void scan_generic_bus(struct device *bus) { struct device *child; -- cgit v1.2.3