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libpayload ehci: Use 64-byte aligned data structures for periodic transfers 

Chapter 3.1 "Periodic Frame List" of EHCI 1.0 specification says
"Frame List Link pointers always reference memory objects that are
32-byte aligned."
jwerner@chromium.org suggests setting it to be 64-byte aligned for
consistency with other EHCI queue structures.

BUG=chrome-os-partner:31993
TEST=Tested on nyan platform. Before adding patch, USB keyboard behind
an external hub is not working to switch between "Default Locale" and
"English" (after pressing ESC+REFRESH+POWER on embedded keyboard and
later Left/Right-Arrow key on USB keyboard).

Change-Id: Ie6259f2df20ae2618c2074e831fad087f227091d
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 23fc02e6ba3b17be4eaf18810ec6fc0d9c0e0b9a
Original-Change-Id: If52ddc43ebd5d509c19f104928dced5bd09b1706
Original-Signed-off-by: Jim Lin <jilin@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/218403
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/8738
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Jim Lin 2014-09-16 16:39:08 +08:00 committed by Patrick Georgi
parent 16713d7a23
commit 627de92d0a
1 changed files with 2 additions and 1 deletions
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3
payloads/libpayload/drivers/usb/ehci.c
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@ -643,7 +643,8 @@ static void *ehci_create_intr_queue(
return NULL; return NULL;
} }
intr_queue_t *const intrq = (intr_queue_t *)malloc(sizeof(intr_queue_t)); intr_queue_t *const intrq = (intr_queue_t *)dma_memalign(64,
sizeof(intr_queue_t));
/* /*
* reqcount data chunks * reqcount data chunks
* plus one more spare, which we'll leave out of queue * plus one more spare, which we'll leave out of queue