summaryrefslogtreecommitdiff
path: root/drivers/usb/host/ehci-pci.c
diff options
context:
space:
mode:
authorAlan Stern <stern@rowland.harvard.edu>2007-05-04 11:52:40 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 16:29:47 -0700
commit383975d765523a56dc43a6cd6d52e9b376800cf2 (patch)
treed6ecbfe620d7d5fba372211d7af185e7c44e5097 /drivers/usb/host/ehci-pci.c
parent0458d5b4c9cc4ca0f62625d0144ddc4b4bc97a3c (diff)
USB: EHCI, OHCI: handover changes
This patch (as887) changes the way ehci-hcd and ohci-hcd handle a loss of VBUS power during suspend. In order for the USB-persist facility to work correctly, it is necessary for low- and full-speed devices attached to a high-speed port to be handed back to the companion controller during resume processing. This entails three changes: adding code to ehci-hcd to perform the handover, removing code from ohci-hcd to turn off ports during root-hub reinit, and adding code to ohci-hcd to turn on ports during PCI controller resume. (Other bus glue resume methods for platforms supporting high-speed controllers would need a similar change, if any existed.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-pci.c')
-rw-r--r--drivers/usb/host/ehci-pci.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 966965f72338..a7816e392a85 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -312,13 +312,14 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
ehci_work(ehci);
spin_unlock_irq(&ehci->lock);
- /* here we "know" root ports should always stay powered */
- ehci_port_power(ehci, 1);
-
ehci_writel(ehci, ehci->command, &ehci->regs->command);
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
+ /* here we "know" root ports should always stay powered */
+ ehci_port_power(ehci, 1);
+ ehci_handover_companion_ports(ehci);
+
hcd->state = HC_STATE_SUSPENDED;
return 0;
}