Documentation/usb/ehci.rst

5 27-Dec-2002
8 USB 2.0-capable host controller hardware.  The USB 2.0 standard is
11     - "High Speed" 480 Mbit/sec (60 MByte/sec)
12     - "Full Speed" 12 Mbit/sec (1.5 MByte/sec)
13     - "Low Speed" 1.5 Mbit/sec
22 interact with the EHCI controller through a "Transaction Translator"
31 While usb-storage devices have been available since mid-2001 (working
34 appear to be on hold until more systems come with USB 2.0 built-in.
39 other changes to the Linux-USB core APIs, including the hub driver,
43 - David Brownell
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60 transaction translators (TTs) in USB 2.0 hubs.  But you may find bugs.
65 Full Speed Isochronous transfer support, through transaction translators,
66 is not yet available.  Note that split transaction support for ISO
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99     # modprobe ehci-hcd
103     # rmmod ehci-hcd
106 "ohci-hcd"  or "uhci-hcd".  In case of any trouble with the EHCI driver,
127 		usb-storage doing disk I/O; watch the request queues!)
138 but they may want to check for "usb_device->speed == USB_SPEED_HIGH".
146 transaction translators are in use; some drivers have been seen to behave
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179 enough for a single device at 20 MByte/sec, putting three such devices
194 default ehci-hcd driver uses the minimum latency, which means that if
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201 To get even 20 MByte/sec transfer rates, Linux-USB device drivers will