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authoraiju <devnull@localhost>2018-03-06 17:18:48 +0000
committeraiju <devnull@localhost>2018-03-06 17:18:48 +0000
commit9226caf2a3bf88258665f4e3786c6abb8820d308 (patch)
treeb4746f9fde85eeffc8457c8c55d0406e52060f7d /sys/man
parent097879eace30b438c8c20edd543f5752d0eec07b (diff)
usbehci: add uframes control request to return uframes one at a time
Diffstat (limited to 'sys/man')
-rw-r--r--sys/man/3/usb7
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/man/3/usb b/sys/man/3/usb
index 5cf446293..ba476c002 100644
--- a/sys/man/3/usb
+++ b/sys/man/3/usb
@@ -398,6 +398,13 @@ Use
as the number of transactions per frame (or µframe), as reported
by the descriptor.
.TP
+.BI uframes " n"
+If
+.I n
+is set to 1 for an isochronous endpoint,
+.IR read(2)
+from the data file will not cross μframe boundaries.
+.TP
.B clrhalt
Clear the halt condition for an endpoint.
Used to recover from a stall caused by a device to signal its driver