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authorDuncan Laurie <dlaurie@google.com>2018-05-07 14:18:13 -0700
committerPatrick Georgi <pgeorgi@google.com>2018-05-11 08:59:51 +0000
commitbae9f85ddbd2e62af1b47169cbfeb10b06d45e04 (patch)
tree7d02393aa9a757ffaaf33fd4ffc841ddc239e4a7 /src/include
parent57df0888169a2622e37dfad3694e3de544b8b6fb (diff)
downloadcoreboot-bae9f85ddbd2e62af1b47169cbfeb10b06d45e04.tar.xz
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>
Diffstat (limited to 'src/include')
-rw-r--r--src/include/device/device.h2
-rw-r--r--src/include/device/path.h8
2 files changed, 10 insertions, 0 deletions
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 744836d9ed..f3afd60b2c 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -27,6 +27,7 @@ struct i2c_bus_operations;
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_smbus(struct device *bus);
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__) */
diff --git a/src/include/device/path.h b/src/include/device/path.h
index eaa9cc7d67..067a507166 100644
--- a/src/include/device/path.h
+++ b/src/include/device/path.h
@@ -15,6 +15,7 @@ enum device_path_type {
DEVICE_PATH_IOAPIC,
DEVICE_PATH_GENERIC,
DEVICE_PATH_SPI,
+ DEVICE_PATH_USB,
DEVICE_PATH_MMIO,
/*
@@ -37,6 +38,7 @@ enum device_path_type {
"DEVICE_PATH_IOAPIC", \
"DEVICE_PATH_GENERIC", \
"DEVICE_PATH_SPI", \
+ "DEVICE_PATH_USB", \
"DEVICE_PATH_MMIO", \
}
@@ -91,6 +93,11 @@ struct generic_path {
unsigned int subid;
};
+struct usb_path {
+ unsigned int port_type;
+ unsigned int port_id;
+};
+
struct mmio_path {
uintptr_t addr;
};
@@ -109,6 +116,7 @@ struct device_path {
struct cpu_bus_path cpu_bus;
struct generic_path generic;
struct spi_path spi;
+ struct usb_path usb;
struct mmio_path mmio;
};
};