fwochi.c and bus_space_barrier()

[Andreas Tobler]

Sean Bruno wrote:
>>> This looks basically good, but as outlined earlier a driver
>>> souldn't busy-wait 50ms. Could one of you please test whether
>>> pause("fwlps", (50 * hz + 999) / 1000) works as a drop-in
>>> replacement for DELAY(50000) here?
>> Works fine here!
>>
>> Thanks!
>> Andreas
>>
>>
>>
> 
> Ok, time for more testing.  A couple of changes here.
> 
> 1.  change busy DELAY() call with pause()
> 2.  test for lps condition before pause(), if not set pause and retry.

Fine here, but see that there was no pause needed, strange.

Andreas


FreeBSD 8.0-CURRENT (GENERIC) #3 r191101:191110M: Wed Apr 15 19:21:30 
CEST 2009
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u60# kldload firewire
fwohci0: <Texas Instruments TSB12LV23> mem 
0x4008000-0x40087ff,0x400c000-0x400ff
ff at device 4.0 on pci0
fwohci0: latency timer 24 -> 32.
fwohci0: cache size 16 -> 16.
fwohci0: [ITHREAD]
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:10:74:60:00:00:ee:a9
fwohci0: resetting OHCI...done (loop=0)
fwohci0: lps(80000) set
fwohci0: Phy 1394a available S400, 3 ports.
fwohci0: Enable 1394a Enhancements
fwohci0: Link S400, max_rec 2048 bytes.
fwohci0: BUS_OPT 0xa002 -> 0xf800a002
fwohci0: fwohci_set_intr: 1
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwohci0: Initiate bus reset
fwohci0: fwohci_intr_core: BUS reset
fwohci0: fwohci_intr_core: node_id=0x00000000, SelfID Count=1, 
CYCLEMASTER mode
node:0 link:1 gap:63 spd:2 con:1 pwr:4 p0:1 p1:1 p2:1 i:1 m:0
firewire0: 1 nodes, maxhop <= 0 capable IRM irm(0)  (me)
fwohci0: fwohci_set_bus_manager: 0->0 (loop=0)
firewire0: bus manager 0
firewire0: fw_phy_config: root_node=-1 gap_count=5
fwohci0: fwohci_start: maxdesc 2
fwohci0: start AT DMA status=0
u60# firewire0: fw_bus_probe:iterate and invalidate all nodes
firewire0: fw_explore:found myself node(0) fc->nodeid(0) fc->max_node(0)
bus_explore done

u60# kldunload firewire
firewire0: detached
fwohci0: fwohci_set_intr: 0
fwohci0: detached
u60#