diff options
Diffstat (limited to 'src/include/ipxe')
| -rw-r--r-- | src/include/ipxe/usb.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/include/ipxe/usb.h b/src/include/ipxe/usb.h index fd027d188..70038368b 100644 --- a/src/include/ipxe/usb.h +++ b/src/include/ipxe/usb.h @@ -867,6 +867,17 @@ struct usb_bus { /** Largest transfer allowed on the bus */ size_t mtu; + /** Address in-use mask + * + * This is used only by buses which perform manual address + * assignment. USB allows for addresses in the range [1,127]. + * We use a simple bitmask which restricts us to the range + * [1,64]; this is unlikely to be a problem in practice. For + * comparison: controllers which perform autonomous address + * assignment (such as xHCI) typically allow for only 32 + * devices per bus anyway. + */ + unsigned long long addresses; /** Root hub */ struct usb_hub *hub; @@ -1022,6 +1033,19 @@ usb_set_feature ( struct usb_device *usb, unsigned int type, } /** + * Set address + * + * @v usb USB device + * @v address Device address + * @ret rc Return status code + */ +static inline __attribute__ (( always_inline )) int +usb_set_address ( struct usb_device *usb, unsigned int address ) { + + return usb_control ( usb, USB_SET_ADDRESS, address, 0, NULL, 0 ); +} + +/** * Get USB descriptor * * @v usb USB device @@ -1148,6 +1172,8 @@ extern int register_usb_bus ( struct usb_bus *bus ); extern void unregister_usb_bus ( struct usb_bus *bus ); extern void free_usb_bus ( struct usb_bus *bus ); +extern int usb_alloc_address ( struct usb_bus *bus ); +extern void usb_free_address ( struct usb_bus *bus, unsigned int address ); extern unsigned int usb_route_string ( struct usb_device *usb ); extern unsigned int usb_depth ( struct usb_device *usb ); extern struct usb_port * usb_root_hub_port ( struct usb_device *usb ); |