usbdebug: Fix migration to ramstage

On entry to ramstage CBMEM is looked for a copy of an already initialized
EHCI debug dongle state. If a copy is found, it contained the state before
CAR migration and the USB protocol data toggle can be out of sync. It's an
even/odd kind of a parity check, so roughly every other build would
show the problem as invalid first line: 'ug found in CBMEM.'

After CAR migration, re-direct the state changes to correct CBMEM table.

Change-Id: I7c54e76ce29af5c8ee5e9ce6fd3dc6bdf700dcf1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7206
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
usbdebug: Refactor on EHCI memory space

We only reference with ehci_caps and ehci_regs during initialisation,
no need to carry those around.

When EHCI BAR is relocated during PCI allocation, record the changed
address even if usbdebug is not enabled. Use the DBGP_EP_VALID flags
to determine if endpoints have been configured or not.

Change-Id: Idfd52edf7c2fc25b1b225985462ac488264e4c6d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7207
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
usbdebug: Move initialisation of the optional hub

Add new file for device-specific initialisation transactions.

Change-Id: I339df400a41675f178c7af613f03b2b44c826189
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7208
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
usbdebug: Refactor descriptor probing of dongle

Organized such that it is easy to support devices that do not
export special Debug Descriptor. Some of these can still work
in a fixed configuration and/or require additional initialisation
for UART clocks etc.

Change-Id: Id07fd6b69007332d67d9e9a456f58fdbca1999cd
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7209
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
usbdebug: Reduce bus reset delays

According to EHCI specification, host controller software stops
the USB Reset condition by writing PORT_RESET=0. Software then
poll-waits this bit until controller hardware has completed USB
Reset sequence and read returns with PORT_RESET==0.

Change-Id: I6033c4d904c2af9eb16f5f3c1eb825776648cc1d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3863
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
usbdebug: Some fix for dongle compatibility

Not sure what this is about.

Required for BeagleBone (not Black) with HUB in the middle, also
old FX2 senses extra reset if we do this.

Change-Id: I86878f8f570911ed1ed3ec844c232ac91e934072
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3868
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>