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devicetree: Add USB device type

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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>
This commit is contained in:
Duncan Laurie 2018-05-07 14:18:13 -07:00 • committed by Patrick Georgi
commit bae9f85ddb
10 changed files with 180 additions and 133 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/include/device/device.h
View file

@ -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__) */

8
src/include/device/path.h
View file

@ -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;
};
};