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| author |   Jason Wessel <jason.wessel@windriver.com> | 2009-08-20 15:39:55 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-23 06:46:38 -0700 |
| commit | aab2d4086a1876fcff282aa36e2d4a92aa9935c9 (patch) | |
| tree | 3b1bb3d934bec91c44eaf61aadb6c624eb8dd9b3 /include/linux/usb/ehci_def.h | |
| parent | USB: ehci-dbgp,ehci: Allow early or late use of the dbgp device (diff) | |
| download | linux-dev-aab2d4086a1876fcff282aa36e2d4a92aa9935c9.tar.xz linux-dev-aab2d4086a1876fcff282aa36e2d4a92aa9935c9.zip | |
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/ehci_def.h')
| -rw-r--r-- | include/linux/usb/ehci_def.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/ehci_def.h b/include/linux/usb/ehci_def.h index 1909d924f816..af4b86f3aca3 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) |