linux/drivers/usb/early
Jason Wessel 815e173e1d USB: ehci-dbgp: split PID register updates for IN and OUT pipes
This patch addresses two problems:

1) Bulk reads should always use the DATA0 for the pid, and the write
   PID should toggle between DATA0 and DATA1.  The fix is using
   dbgp_pid_write_update() and dbgp_pid_read_update().

2) The delay loop for waiting for a transaction was not long enough to
   always complete the initial handshake inside dbgp_wait_until_done().
   After the initial handshake the maximum delay length is never reached.

The combined result of these two changes allows for the removal of the
forced resynchronization where a bulk write was issued with a dummy
data payload only to get the device to start accepting data writes
again.

CC: Eric Biederman <ebiederm@xmission.com>
CC: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-02 14:54:58 -08:00
..
Makefile USB: ehci,dbgp,early_printk: split ehci debug driver from early_printk.c 2009-09-23 06:46:38 -07:00
ehci-dbgp.c USB: ehci-dbgp: split PID register updates for IN and OUT pipes 2010-03-02 14:54:58 -08:00