Commit b9df7942 authored by Alek Du's avatar Alek Du Committed by Greg Kroah-Hartman

USB: ehci: phy low power mode bug fixing

1. There are two msleep calls inside two spin lock sections, need to unlock
   and lock again after msleep.
2. Save a extra status reg setting.
Signed-off-by: default avatarAlek Du <alek.du@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6feb63b6
...@@ -196,7 +196,9 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) ...@@ -196,7 +196,9 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
if (hostpc_reg) { if (hostpc_reg) {
u32 t3; u32 t3;
spin_unlock_irq(&ehci->lock);
msleep(5);/* 5ms for HCD enter low pwr mode */ msleep(5);/* 5ms for HCD enter low pwr mode */
spin_lock_irq(&ehci->lock);
t3 = ehci_readl(ehci, hostpc_reg); t3 = ehci_readl(ehci, hostpc_reg);
ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
t3 = ehci_readl(ehci, hostpc_reg); t3 = ehci_readl(ehci, hostpc_reg);
...@@ -904,17 +906,18 @@ static int ehci_hub_control ( ...@@ -904,17 +906,18 @@ static int ehci_hub_control (
if ((temp & PORT_PE) == 0 if ((temp & PORT_PE) == 0
|| (temp & PORT_RESET) != 0) || (temp & PORT_RESET) != 0)
goto error; goto error;
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
/* After above check the port must be connected. /* After above check the port must be connected.
* Set appropriate bit thus could put phy into low power * Set appropriate bit thus could put phy into low power
* mode if we have hostpc feature * mode if we have hostpc feature
*/ */
if (hostpc_reg) {
temp &= ~PORT_WKCONN_E; temp &= ~PORT_WKCONN_E;
temp |= (PORT_WKDISC_E | PORT_WKOC_E); temp |= PORT_WKDISC_E | PORT_WKOC_E;
ehci_writel(ehci, temp | PORT_SUSPEND, ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
status_reg); if (hostpc_reg) {
spin_unlock_irqrestore(&ehci->lock, flags);
msleep(5);/* 5ms for HCD enter low pwr mode */ msleep(5);/* 5ms for HCD enter low pwr mode */
spin_lock_irqsave(&ehci->lock, flags);
temp1 = ehci_readl(ehci, hostpc_reg); temp1 = ehci_readl(ehci, hostpc_reg);
ehci_writel(ehci, temp1 | HOSTPC_PHCD, ehci_writel(ehci, temp1 | HOSTPC_PHCD,
hostpc_reg); hostpc_reg);
......
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