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[usb] Maintain a list of all USB buses 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/36/head
Michael Brown 2015-05-08 15:07:26 +01:00
parent f6604627ff
commit 5e1e2069fd
2 changed files with 18 additions and 0 deletions
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10
src/drivers/bus/usb.c
View File

@ -40,6 +40,9 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*
*/
/** List of USB buses */
struct list_head usb_buses = LIST_HEAD_INIT ( usb_buses );
/******************************************************************************
*
* Utility functions
@ -1894,6 +1897,9 @@ int register_usb_bus ( struct usb_bus *bus ) {
if ( ( rc = bus->host->open ( bus ) ) != 0 )
goto err_open;
/* Add to list of USB buses */
list_add_tail ( &bus->list, &usb_buses );
/* Register root hub */
if ( ( rc = register_usb_hub ( bus->hub ) ) != 0 )
goto err_register_hub;
@ -1905,6 +1911,7 @@ int register_usb_bus ( struct usb_bus *bus ) {
unregister_usb_hub ( bus->hub );
err_register_hub:
list_del ( &bus->list );
bus->host->close ( bus );
err_open:
return rc;
@ -1927,6 +1934,9 @@ void unregister_usb_bus ( struct usb_bus *bus ) {
/* Unregister root hub */
unregister_usb_hub ( bus->hub );
/* Remove from list of USB buses */
list_del ( &bus->list );
/* Close bus */
bus->host->close ( bus );

8
src/include/ipxe/usb.h
View File

@ -916,6 +916,8 @@ struct usb_bus {
/** Root hub */
struct usb_hub *hub;
/** List of USB buses */
struct list_head list;
/** List of devices */
struct list_head devices;
/** List of hubs */
@ -999,6 +1001,10 @@ usb_poll ( struct usb_bus *bus ) {
bus->host->poll ( bus );
}
/** Iterate over all USB buses */
#define for_each_usb_bus( bus ) \
list_for_each_entry ( (bus), &usb_buses, list )
/**
* Complete transfer (without error)
*
@ -1182,6 +1188,8 @@ usb_set_interface ( struct usb_device *usb, unsigned int interface,
NULL, 0 );
}
extern struct list_head usb_buses;
extern struct usb_interface_descriptor *
usb_interface_descriptor ( struct usb_configuration_descriptor *config,
unsigned int interface, unsigned int alternate );