1 files changed, 25 insertions, 33 deletions

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 1e27f10c1592..13cd2177b557 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -95,12 +95,11 @@
 #include <linux/init.h>
 #include <linux/timer.h>
 #include <linux/list.h>
-#include <linux/interrupt.h>  /* for in_interrupt () */
 #include <linux/usb.h>
 #include <linux/usb_otg.h>
-#include "../core/hcd.h"
 #include <linux/dma-mapping.h> 
-#include <linux/dmapool.h>    /* needed by ohci-mem.c when no PCI */
+#include <linux/dmapool.h>
+#include <linux/reboot.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -108,8 +107,9 @@
 #include <asm/unaligned.h>
 #include <asm/byteorder.h>
 
+#include "../core/hcd.h"
 
-#define DRIVER_VERSION "2004 Nov 08"
+#define DRIVER_VERSION "2005 April 22"
 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
 
@@ -141,6 +141,7 @@ static const char	hcd_name [] = "ohci_hcd";
 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
 static int ohci_init (struct ohci_hcd *ohci);
 static void ohci_stop (struct usb_hcd *hcd);
+static int ohci_reboot (struct notifier_block *, unsigned long , void *);
 
 #include "ohci-hub.c"
 #include "ohci-dbg.c"
@@ -420,6 +421,23 @@ static void ohci_usb_reset (struct ohci_hcd *ohci)
         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 }
 
+/* reboot notifier forcibly disables IRQs and DMA, helping kexec and
+ * other cases where the next software may expect clean state from the
+ * "firmware".  this is bus-neutral, unlike shutdown() methods.
+ */
+static int
+ohci_reboot (struct notifier_block *block, unsigned long code, void *null)
+{
+        struct ohci_hcd *ohci;
+
+        ohci = container_of (block, struct ohci_hcd, reboot_notifier);
+        ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+        ohci_usb_reset (ohci);
+        /* flush the writes */
+        (void) ohci_readl (ohci, &ohci->regs->control);
+        return 0;
+}
+
 /*-------------------------------------------------------------------------*
  * HC functions
  *-------------------------------------------------------------------------*/
@@ -487,13 +505,10 @@ static int ohci_init (struct ohci_hcd *ohci)
 /* Start an OHCI controller, set the BUS operational
  * resets USB and controller
  * enable interrupts 
- * connect the virtual root hub
  */
 static int ohci_run (struct ohci_hcd *ohci)
 {
         u32                     mask, temp;
-        struct usb_device       *udev;
-        struct usb_bus          *bus;
         int                     first = ohci->fminterval == 0;
 
         disable (ohci);
@@ -654,37 +669,13 @@ retry:
 
         // POTPGT delay is bits 24-31, in 2 ms units.
         mdelay ((temp >> 23) & 0x1fe);
-        bus = &ohci_to_hcd(ohci)->self;
         ohci_to_hcd(ohci)->state = HC_STATE_RUNNING;
 
         ohci_dump (ohci, 1);
 
-        udev = bus->root_hub;
-        if (udev) {
-                return 0;
-        }
- 
-        /* connect the virtual root hub */
-        udev = usb_alloc_dev (NULL, bus, 0);
-        if (!udev) {
-                disable (ohci);
-                ohci->hc_control &= ~OHCI_CTRL_HCFS;
-                ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
-                return -ENOMEM;
-        }
-
-        udev->speed = USB_SPEED_FULL;
-        if (usb_hcd_register_root_hub (udev, ohci_to_hcd(ohci)) != 0) {
-                usb_put_dev (udev);
-                disable (ohci);
-                ohci->hc_control &= ~OHCI_CTRL_HCFS;
-                ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
-                return -ENODEV;
-        }
-        if (ohci->power_budget)
-                hub_set_power_budget(udev, ohci->power_budget);
+        if (ohci_to_hcd(ohci)->self.root_hub == NULL)
+                create_debug_files (ohci);
 
-        create_debug_files (ohci);
         return 0;
 }
 
@@ -781,6 +772,7 @@ static void ohci_stop (struct usb_hcd *hcd)
         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
         
         remove_debug_files (ohci);
+        unregister_reboot_notifier (&ohci->reboot_notifier);
         ohci_mem_cleanup (ohci);
         if (ohci->hcca) {
                 dma_free_coherent (hcd->self.controller,