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authorJason Wessel <jason.wessel@windriver.com>2009-08-20 15:39:55 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-09-23 06:46:38 -0700
commitaab2d4086a1876fcff282aa36e2d4a92aa9935c9 (patch)
tree3b1bb3d934bec91c44eaf61aadb6c624eb8dd9b3 /include/linux/usb
parent8d053c79f22462f55c02c8083580730b922cf7b4 (diff)
USB: ehci-dbgp: errata for EHCI debug controller initialization
On some EHCI usb debug controllers, the EHCI debug device will fail to be seen after a port reset, after a warm reset. Two options exist to get the device to initialize correctly. Option 1 is to unplug and plug in the device. Option 2 is to use the EHCI port test to get the usb debug device to start talking again. At that point the debug controller port reset will succeed. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> CC: dbrownell@users.sourceforge.net Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb')
-rw-r--r--include/linux/usb/ehci_def.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/ehci_def.h b/include/linux/usb/ehci_def.h
index 1909d924f81..af4b86f3aca 100644
--- a/include/linux/usb/ehci_def.h
+++ b/include/linux/usb/ehci_def.h
@@ -105,6 +105,7 @@ struct ehci_regs {
#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */
#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */
/* 19:16 for port testing */
+#define PORT_TEST_PKT (0x4<<16) /* Port Test Control - packet test */
#define PORT_LED_OFF (0<<14)
#define PORT_LED_AMBER (1<<14)
#define PORT_LED_GREEN (2<<14)