58 lines
2.4 KiB
Plaintext
58 lines
2.4 KiB
Plaintext
$NetBSD: IMPLEMENTATION,v 1.4 2001/05/13 05:01:42 jmc Exp $
|
|
|
|
At time point in time, there are 3 controller drivers planned:
|
|
|
|
fwochi IEEE 1394 OHCI Controller (PCI & CardBus)
|
|
fwlynx TI TSB12LV21 (found B&W G3s)
|
|
fwsony Sony CXD1947A (found on Sony Vaio laptops)
|
|
|
|
(Though as of this time, Sony has declined to release documentation
|
|
about the CXD1947A).
|
|
|
|
The device heirarchy will look like (using fwohci as the example):
|
|
|
|
#
|
|
# The controller driver. Handles the device-specific 1394 functions.
|
|
#
|
|
fwohci* at pci? dev ? function ?
|
|
# For each remote 1394 device on the 1394 bus, there will be a corresponding
|
|
# fwnode. If a 1394 device offers any supported services, they will be
|
|
# a child of corresponding fwnode. A particular fwnode can be tied to a
|
|
# specific device by specifing its nodeid as its identifier (XXX this
|
|
# is a 64 bit quantity and locators used by config must be 32 bit integers).
|
|
#
|
|
fwnode0 at fwbus? idhi 0x003065ff idlo 0xfedc46c0
|
|
fwnode1 at fwbus? idhi 0x0060e202 idlo 0x0000157e
|
|
fwnode2 at fwbus? idhi 0x00110600 idlo 0x00003169
|
|
fwnode* at fwbus? idhi ? idlo ?
|
|
#
|
|
# An ip capable interface can be added to the local bus as a service to offer
|
|
# on the bus. (the code will only attach to the local bridge so 2 boxes plugged
|
|
# into each other would only each have fw0, but would see there's another one
|
|
# out there when they probe the config rom's)
|
|
#
|
|
fw* at fwbus?
|
|
#
|
|
# NOTE: All fwbus's, fw's, fwnode's derive their device struct from an
|
|
# ieee1394_softc which allows the various layers to have a standard way to
|
|
# look at values in their children nodes. (updating nodeid's, etc)
|
|
#
|
|
# One of the services that a node might offer is access to SCSI devices via
|
|
# SBP-2. As decsribed above, this mean a scsibus is a child of fwnode at some
|
|
# point. (Making it a direct child is bad since that drags in the whole scsi
|
|
# code base even if all a person wants is an fwnode and camera support)
|
|
#
|
|
fwscsi* at fwnode?
|
|
scsibus* at fwscsi?
|
|
|
|
Note that with advent of highly mobile storage devices, the need for
|
|
signatures or other mechanisms to identity disks indepentend of their
|
|
localtion in the device hierarchy is sorely needed.
|
|
|
|
fwohci0 at pci1 dev 12 function 0: NEC uPD72870 IEEE 1394 OHCI Host Controller (rev. 0x01)
|
|
fwohci0: interrupting at isa irq 15
|
|
fwohci0: OHCI 1.0
|
|
fw0 at fwohci0: Id 00:d0:f5:20:00:00:5e:84, 400Mb/s, 1024 byte packets max
|
|
fw0: isochronous channels: 16 transmit, 16 receive
|
|
fwnode0 at fwohci0: Id xx:xx:xx:xx:xx:xx:xx:xx
|