This is a note to let you know that I've just added the patch titled
Subject: UHCI: workaround for Asus motherboard
to my gregkh-2.6 tree. Its filename is
uhci-workaround-for-asus-motherboard.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From [EMAIL PROTECTED] Tue Oct 10 07:54:28 2006
Date: Tue, 10 Oct 2006 10:54:00 -0400 (EDT)
From: Alan Stern <[EMAIL PROTECTED]>
To: Greg KH <[EMAIL PROTECTED]>
cc: [EMAIL PROTECTED], USB development list
<linux-usb-devel@lists.sourceforge.net>
Subject: UHCI: workaround for Asus motherboard
Message-ID: <[EMAIL PROTECTED]>
This patch (as798) adds a workaround to uhci-hcd. At least one Asus
motherboard is wired in such a way that any device attached to a
suspended UHCI controller will prevent the system from entering
suspend-to-RAM by immediately waking it up. The only way around the
problem is to turn the controller off instead of suspending it.
This fixes Bugzilla #6193.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/host/uhci-hcd.c | 44 +++++++++++++++++++++++++++++++++++++++-----
1 file changed, 39 insertions(+), 5 deletions(-)
--- gregkh-2.6.orig/drivers/usb/host/uhci-hcd.c
+++ gregkh-2.6/drivers/usb/host/uhci-hcd.c
@@ -40,6 +40,7 @@
#include <linux/dma-mapping.h>
#include <linux/usb.h>
#include <linux/bitops.h>
+#include <linux/dmi.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@@ -196,12 +197,42 @@ static int resume_detect_interrupts_are_
return 0;
}
+static int remote_wakeup_is_broken(struct uhci_hcd *uhci)
+{
+ static struct dmi_system_id broken_wakeup_table[] = {
+ {
+ .ident = "Asus A7V8X",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK"),
+ DMI_MATCH(DMI_BOARD_NAME, "A7V8X"),
+ DMI_MATCH(DMI_BOARD_VERSION, "REV 1.xx"),
+ }
+ },
+ { }
+ };
+ int port;
+
+ /* One of Asus's motherboards has a bug which causes it to
+ * wake up immediately from suspend-to-RAM if any of the ports
+ * are connected. In such cases we will not set EGSM.
+ */
+ if (dmi_check_system(broken_wakeup_table)) {
+ for (port = 0; port < uhci->rh_numports; ++port) {
+ if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
+ USBPORTSC_CCS)
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
__releases(uhci->lock)
__acquires(uhci->lock)
{
int auto_stop;
- int int_enable;
+ int int_enable, egsm_enable;
auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
@@ -217,15 +248,18 @@ __acquires(uhci->lock)
}
/* Enable resume-detect interrupts if they work.
- * Then enter Global Suspend mode, still configured.
+ * Then enter Global Suspend mode if _it_ works, still configured.
*/
+ egsm_enable = USBCMD_EGSM;
uhci->working_RD = 1;
int_enable = USBINTR_RESUME;
- if (resume_detect_interrupts_are_broken(uhci)) {
+ if (remote_wakeup_is_broken(uhci))
+ egsm_enable = 0;
+ if (resume_detect_interrupts_are_broken(uhci) || !egsm_enable)
uhci->working_RD = int_enable = 0;
- }
+
outw(int_enable, uhci->io_addr + USBINTR);
- outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD);
+ outw(egsm_enable | USBCMD_CF, uhci->io_addr + USBCMD);
mb();
udelay(5);
Patches currently in gregkh-2.6 which might be from [EMAIL PROTECTED] are
driver/driver-core-don-t-ignore-error-returns-from-probing.patch
usb/usb-unusual_devs-entry-for-nokia-6131.patch
usb/ehci-hcd-fix-budget_pool-allocation-for-machines-with-multiple-ehci-controllers.patch
usb/uhci-workaround-for-asus-motherboard.patch
usb/usbcore-fix-endpoint-device-creation.patch
usb/usbcore-fix-refcount-bug-in-endpoint-removal.patch
usb/usb-takes-31-devices-per-hub.patch
usb/usb-hub-root-hub-code-takes-more-than-15-devices.patch
ehci-repair-remote-wakeup-support.patch
usb-hub-autosuspend-autoresume.patch
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