[PATCH] USB: EHCI updates (4/4) driver model wakeup flags

This teaches the EHCI driver to use the new driver model wakeup flags,
replacing the similar ones in the HCD glue.  It also adds a workaround
for the current glitch whereby PCI init doesn't init the wakeup flags
from the PCI PM capabilities.  (EHCI controllers don't worry about
legacy mode; the PCI PM capability would always do the job.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/ehci-hcd.c

@@ -624,7 +624,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs)
 	}
 
 	/* remote wakeup [4.3.1] */
-	if ((status & STS_PCD) && hcd->remote_wakeup) {
+	if ((status & STS_PCD) && device_may_wakeup(&hcd->self.root_hub->dev)) {
 		unsigned	i = HCS_N_PORTS (ehci->hcs_params);
 
 		/* resume root hub? */

drivers/usb/host/ehci-hub.c

@@ -59,7 +59,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 
 		if ((t1 & PORT_PE) && !(t1 & PORT_OWNER))
 			t2 |= PORT_SUSPEND;
-		if (hcd->remote_wakeup)
+		if (device_may_wakeup(&hcd->self.root_hub->dev))
 			t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E;
 		else
 			t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E);
@@ -517,7 +517,7 @@ static int ehci_hub_control (
 			if ((temp & PORT_PE) == 0
 					|| (temp & PORT_RESET) != 0)
 				goto error;
-			if (hcd->remote_wakeup)
+			if (device_may_wakeup(&hcd->self.root_hub->dev))
 				temp |= PORT_WAKE_BITS;
 			writel (temp | PORT_SUSPEND,
 				&ehci->regs->port_status [wIndex]);

drivers/usb/host/ehci-pci.c

@@ -210,7 +210,16 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
 	/* Serial Bus Release Number is at PCI 0x60 offset */
 	pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
 
-	/* REVISIT:  per-port wake capability (PCI 0x62) currently unused */
+	/* Workaround current PCI init glitch:  wakeup bits aren't
+	 * being set from PCI PM capability.
+	 */
+	if (!device_can_wakeup(&pdev->dev)) {
+		u16	port_wake;
+
+		pci_read_config_word(pdev, 0x62, &port_wake);
+		if (port_wake & 0x0001)
+			device_init_wakeup(&pdev->dev, 1);
+	}
 
 	retval = ehci_pci_reinit(ehci, pdev);
 done: