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| USB_BUS_START_ENUM(9) | Host Controller APIs | USB_BUS_START_ENUM(9) |
NAME¶
usb_bus_start_enum - start immediate enumeration (for OTG)
SYNOPSIS¶
int usb_bus_start_enum(struct usb_bus * bus, unsigned port_num);
ARGUMENTS¶
bus
the bus (must use hcd framework)
port_num
1-based number of port; usually bus->otg_port
CONTEXT¶
in_interrupt
DESCRIPTION¶
Starts enumeration, with an immediate reset followed later by hub_wq identifying and possibly configuring the device. This is needed by OTG controller drivers, where it helps meet HNP protocol timing requirements for starting a port reset.
RETURN¶
0 if successful.
COPYRIGHT¶
| January 2017 | Kernel Hackers Manual 4.8. |