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path: root/drivers/usb/host/ehci-hub.c
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Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
-rw-r--r--drivers/usb/host/ehci-hub.c84
1 files changed, 79 insertions, 5 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index f46ad27c9a90..1b6f1c0e5cee 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -111,6 +111,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
int port;
int mask;
+ u32 __iomem *hostpc_reg = NULL;
ehci_dbg(ehci, "suspend root hub\n");
@@ -142,6 +143,9 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
u32 t2 = t1;
+ if (ehci->has_hostpc)
+ hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
+ + HOSTPC0 + 4 * (port & 0xff));
/* keep track of which ports we suspend */
if (t1 & PORT_OWNER)
set_bit(port, &ehci->owned_ports);
@@ -151,15 +155,37 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
}
/* enable remote wakeup on all ports */
- if (hcd->self.root_hub->do_remote_wakeup)
- t2 |= PORT_WAKE_BITS;
- else
+ if (hcd->self.root_hub->do_remote_wakeup) {
+ /* only enable appropriate wake bits, otherwise the
+ * hardware can not go phy low power mode. If a race
+ * condition happens here(connection change during bits
+ * set), the port change detection will finally fix it.
+ */
+ if (t1 & PORT_CONNECT) {
+ t2 |= PORT_WKOC_E | PORT_WKDISC_E;
+ t2 &= ~PORT_WKCONN_E;
+ } else {
+ t2 |= PORT_WKOC_E | PORT_WKCONN_E;
+ t2 &= ~PORT_WKDISC_E;
+ }
+ } else
t2 &= ~PORT_WAKE_BITS;
if (t1 != t2) {
ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
port + 1, t1, t2);
ehci_writel(ehci, t2, reg);
+ if (hostpc_reg) {
+ u32 t3;
+
+ msleep(5);/* 5ms for HCD enter low pwr mode */
+ t3 = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
+ t3 = ehci_readl(ehci, hostpc_reg);
+ ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
+ port, (t3 & HOSTPC_PHCD) ?
+ "succeeded" : "failed");
+ }
}
}
@@ -183,6 +209,11 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
ehci->next_statechange = jiffies + msecs_to_jiffies(10);
spin_unlock_irq (&ehci->lock);
+
+ /* ehci_work() may have re-enabled the watchdog timer, which we do not
+ * want, and so we must delete any pending watchdog timer events.
+ */
+ del_timer_sync(&ehci->watchdog);
return 0;
}
@@ -204,6 +235,13 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
return -ESHUTDOWN;
}
+ if (unlikely(ehci->debug)) {
+ if (ehci->debug && !dbgp_reset_prep())
+ ehci->debug = NULL;
+ else
+ dbgp_external_startup();
+ }
+
/* Ideally and we've got a real resume here, and no port's power
* was lost. (For PCI, that means Vaux was maintained.) But we
* could instead be restoring a swsusp snapshot -- so that BIOS was
@@ -563,7 +601,8 @@ static int ehci_hub_control (
int ports = HCS_N_PORTS (ehci->hcs_params);
u32 __iomem *status_reg = &ehci->regs->port_status[
(wIndex & 0xff) - 1];
- u32 temp, status;
+ u32 __iomem *hostpc_reg = NULL;
+ u32 temp, temp1, status;
unsigned long flags;
int retval = 0;
unsigned selector;
@@ -575,6 +614,9 @@ static int ehci_hub_control (
* power, "this is the one", etc. EHCI spec supports this.
*/
+ if (ehci->has_hostpc)
+ hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
+ + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
spin_lock_irqsave (&ehci->lock, flags);
switch (typeReq) {
case ClearHubFeature:
@@ -773,7 +815,11 @@ static int ehci_hub_control (
if (temp & PORT_CONNECT) {
status |= 1 << USB_PORT_FEAT_CONNECTION;
// status may be from integrated TT
- status |= ehci_port_speed(ehci, temp);
+ if (ehci->has_hostpc) {
+ temp1 = ehci_readl(ehci, hostpc_reg);
+ status |= ehci_port_speed(ehci, temp1);
+ } else
+ status |= ehci_port_speed(ehci, temp);
}
if (temp & PORT_PE)
status |= 1 << USB_PORT_FEAT_ENABLE;
@@ -816,6 +862,15 @@ static int ehci_hub_control (
case SetPortFeature:
selector = wIndex >> 8;
wIndex &= 0xff;
+ if (unlikely(ehci->debug)) {
+ /* If the debug port is active any port
+ * feature requests should get denied */
+ if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
+ (readl(&ehci->debug->control) & DBGP_ENABLED)) {
+ retval = -ENODEV;
+ goto error_exit;
+ }
+ }
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
@@ -832,6 +887,24 @@ static int ehci_hub_control (
|| (temp & PORT_RESET) != 0)
goto error;
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
+ /* After above check the port must be connected.
+ * Set appropriate bit thus could put phy into low power
+ * mode if we have hostpc feature
+ */
+ if (hostpc_reg) {
+ temp &= ~PORT_WKCONN_E;
+ temp |= (PORT_WKDISC_E | PORT_WKOC_E);
+ ehci_writel(ehci, temp | PORT_SUSPEND,
+ status_reg);
+ msleep(5);/* 5ms for HCD enter low pwr mode */
+ temp1 = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, temp1 | HOSTPC_PHCD,
+ hostpc_reg);
+ temp1 = ehci_readl(ehci, hostpc_reg);
+ ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
+ wIndex, (temp1 & HOSTPC_PHCD) ?
+ "succeeded" : "failed");
+ }
set_bit(wIndex, &ehci->suspended_ports);
break;
case USB_PORT_FEAT_POWER:
@@ -894,6 +967,7 @@ error:
/* "stall" on error */
retval = -EPIPE;
}
+error_exit:
spin_unlock_irqrestore (&ehci->lock, flags);
return retval;
}