Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-12 00:38:55 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

USB: xhci: Allow roothub ports to be disabled.

Browse Source 
Add the hub emulation code to allow ports on an xHCI root hub to be
disabled.  Add the code to clear the port enabled/disabled bit, and clear
the port enabled/disabled change bit.  Like EHCI, the port cannot be
enabled by setting the port enabled/disabled bit.  Instead, a port is
enabled by the host controller after a reset.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-12-09 15:59:11 -08:00 committed by Greg Kroah-Hartman
parent 34fb562a43
commit 6219c047d3
1 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/usb/host/xhci-hub.c
View File

@ -129,6 +129,16 @@ static u32 xhci_port_state_to_neutral(u32 state)
return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
}
static void xhci_disable_port(struct xhci_hcd *xhci, u16 wIndex,
u32 __iomem *addr, u32 port_status)
{
/* Write 1 to disable the port */
xhci_writel(xhci, port_status | PORT_PE, addr);
port_status = xhci_readl(xhci, addr);
xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n",
wIndex, port_status);
}
static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
u16 wIndex, u32 __iomem *addr, u32 port_status)
{
@ -148,6 +158,10 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
status = PORT_OCC;
port_change_bit = "over-current";
break;
case USB_PORT_FEAT_C_ENABLE:
status = PORT_PEC;
port_change_bit = "enable/disable";
break;
default:
/* Should never happen */
return;
@ -260,9 +274,13 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
case USB_PORT_FEAT_C_RESET:
case USB_PORT_FEAT_C_CONNECTION:
case USB_PORT_FEAT_C_OVER_CURRENT:
case USB_PORT_FEAT_C_ENABLE:
xhci_clear_port_change_bit(xhci, wValue, wIndex,
addr, temp);
break;
case USB_PORT_FEAT_ENABLE:
xhci_disable_port(xhci, wIndex, addr, temp);
break;
default:
goto error;
}