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xhci: Add helper to get xhci roothub from hcd

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quick way to get the xhci roothub and thus all the ports
belonging to a certain hcd

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2018-05-21 16:39:54 +03:00 committed by Greg Kroah-Hartman
parent 9ea95ecc7f
commit ffd4b4fc0b
2 changed files with 11 additions and 0 deletions
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9
drivers/usb/host/xhci-hub.c
View File

@ -554,6 +554,15 @@ static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array)
return max_ports;
}
struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
if (hcd->speed >= HCD_USB3)
return &xhci->usb3_rhub;
return &xhci->usb2_rhub;
}
static __le32 __iomem *xhci_get_port_io_addr(struct usb_hcd *hcd, int index)
{
__le32 __iomem **port_array;

2
drivers/usb/host/xhci.h
View File

@ -2110,6 +2110,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1);
struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd);
void xhci_hc_died(struct xhci_hcd *xhci);
#ifdef CONFIG_PM