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[usb] Add clear_tt() hub method to clear transaction translator buffer

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-03-23 15:59:51 +00:00
parent de6f4e3ede
commit 9e88194655
5 changed files with 114 additions and 2 deletions
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24
src/drivers/usb/ehci.c
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@@ -1022,7 +1022,7 @@ static void ehci_endpoint_close ( struct usb_endpoint *ep ) {
/* No way to prevent hardware from continuing to
* access the memory, so leak it.
*/
DBGC ( ehci, "EHCI %p %s endpoint %d could not unschedule: "
DBGC ( ehci, "EHCI %p %s endpoint %02x could not unschedule: "
"%s\n", ehci, usb->name, ep->address, strerror ( rc ) );
return;
}
@@ -1217,7 +1217,7 @@ static void ehci_endpoint_poll ( struct ehci_endpoint *endpoint ) {
*/
if ( status & EHCI_STATUS_HALTED ) {
rc = -EIO_STATUS ( status );
DBGC ( ehci, "EHCI %p %s endpoint %d completion %d "
DBGC ( ehci, "EHCI %p %s endpoint %02x completion %d "
"failed (status %02x): %s\n", ehci, usb->name,
ep->address, index, status, strerror ( rc ) );
while ( ! iobuf )
@@ -1496,6 +1496,25 @@ static int ehci_hub_speed ( struct usb_hub *hub, struct usb_port *port ) {
return 0;
}
/**
* Clear transaction translator buffer
*
* @v hub USB hub
* @v port USB port
* @v ep USB endpoint
* @ret rc Return status code
*/
static int ehci_hub_clear_tt ( struct usb_hub *hub, struct usb_port *port,
struct usb_endpoint *ep ) {
struct ehci_device *ehci = usb_hub_get_drvdata ( hub );
/* Should never be called; this is a root hub */
DBGC ( ehci, "EHCI %p port %d nonsensical CLEAR_TT for %s endpoint "
"%02x\n", ehci, port->address, ep->usb->name, ep->address );
return -ENOTSUP;
}
/**
* Poll for port status changes
*
@@ -1706,6 +1725,7 @@ static struct usb_host_operations ehci_operations = {
.enable = ehci_hub_enable,
.disable = ehci_hub_disable,
.speed = ehci_hub_speed,
.clear_tt = ehci_hub_clear_tt,
},
};