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authorNico Huber <nico.huber@secunet.com>2013-06-06 10:20:35 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-06-13 22:16:39 +0200
commitaee44fa37d780cfec95c444f43defd89ded021f0 (patch)
tree55fc6d2955f6e8cfb0b452c24c33b4a47225a5d4 /payloads/libpayload/include
parent482af6d15ca8eed28b51edc11692815419326d65 (diff)
downloadcoreboot-aee44fa37d780cfec95c444f43defd89ded021f0.tar.xz
libpayload: usb: Add interval attribute to endpoints
Read bInterval from endpoint descriptors and store it in our endpoint_t struct. The interval is encoded dependently on the device' speed and the endpoint's type. Therefore, it will be normalized to the binary logarithm of the number of microframes, i.e. t = 125us * 2^interval The interval attribute will be used in the xHCI driver. Change-Id: I65a8eda6145faf34666800789f0292e640a8141b Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: http://review.coreboot.org/3449 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload/include')
-rw-r--r--payloads/libpayload/include/usb/usb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/payloads/libpayload/include/usb/usb.h b/payloads/libpayload/include/usb/usb.h
index 3aac2aee6c..ab457088f8 100644
--- a/payloads/libpayload/include/usb/usb.h
+++ b/payloads/libpayload/include/usb/usb.h
@@ -91,6 +91,8 @@ typedef struct {
int toggle;
int maxpacketsize;
endpoint_type type;
+ int interval; /* expressed as binary logarithm of the number
+ of microframes (i.e. t = 125us * 2^interval) */
} endpoint_t;
enum { FULL_SPEED = 0, LOW_SPEED = 1, HIGH_SPEED = 2, SUPER_SPEED = 3 };