Merge master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / drivers / usb / host / ehci-hcd.c

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 185721d..a740564 100644 (file)
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -42,6 +42,9 @@
 #include <asm/irq.h>
 #include <asm/system.h>
 #include <asm/unaligned.h>
+#ifdef CONFIG_PPC_PS3
+#include <asm/firmware.h>
+#endif
 
 
 /*-------------------------------------------------------------------------*/
@@ -299,6 +302,19 @@ static void ehci_watchdog (unsigned long param)
        spin_unlock_irqrestore (&ehci->lock, flags);
 }
 
+/* On some systems, leaving remote wakeup enabled prevents system shutdown.
+ * The firmware seems to think that powering off is a wakeup event!
+ * This routine turns off remote wakeup and everything else, on all ports.
+ */
+static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
+{
+       int     port = HCS_N_PORTS(ehci->hcs_params);
+
+       while (port--)
+               ehci_writel(ehci, PORT_RWC_BITS,
+                               &ehci->regs->port_status[port]);
+}
+
 /* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
  * This forcibly disables dma and IRQs, helping kexec and other cases
  * where the next system software may expect clean state.
@@ -310,9 +326,13 @@ ehci_shutdown (struct usb_hcd *hcd)
 
        ehci = hcd_to_ehci (hcd);
        (void) ehci_halt (ehci);
+       ehci_turn_off_all_ports(ehci);
 
        /* make BIOS/etc use companion controller during reboot */
        ehci_writel(ehci, 0, &ehci->regs->configured_flag);
+
+       /* unblock posted writes */
+       ehci_readl(ehci, &ehci->regs->configured_flag);
 }
 
 static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
@@ -951,15 +971,18 @@ static int __init ehci_hcd_init(void)
 #endif
 
 #ifdef PS3_SYSTEM_BUS_DRIVER
-       retval = ps3_system_bus_driver_register(&PS3_SYSTEM_BUS_DRIVER);
-       if (retval < 0) {
+       if (firmware_has_feature(FW_FEATURE_PS3_LV1)) {
+               retval = ps3_system_bus_driver_register(
+                               &PS3_SYSTEM_BUS_DRIVER);
+               if (retval < 0) {
 #ifdef PLATFORM_DRIVER
-               platform_driver_unregister(&PLATFORM_DRIVER);
+                       platform_driver_unregister(&PLATFORM_DRIVER);
 #endif
 #ifdef PCI_DRIVER
-               pci_unregister_driver(&PCI_DRIVER);
+                       pci_unregister_driver(&PCI_DRIVER);
 #endif
-               return retval;
+                       return retval;
+               }
        }
 #endif
 
@@ -976,7 +999,8 @@ static void __exit ehci_hcd_cleanup(void)
        pci_unregister_driver(&PCI_DRIVER);
 #endif
 #ifdef PS3_SYSTEM_BUS_DRIVER
-       ps3_system_bus_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
+       if (firmware_has_feature(FW_FEATURE_PS3_LV1))
+               ps3_system_bus_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
 #endif
 }
 module_exit(ehci_hcd_cleanup);