[Info-vax] Processes hang on USB-access

[Joukj]

Volker Halle wrote:
> Only the SDA> USB SHOW OHCI UCB command may show useful information
> 

On the system where the USB is still working normally:


SDA> USB SHOW OHCI UCB
Open Host Controller UCB extensions
Direct DMA window base address      0000000000000000
I/O handle                          ffffffff826eb380
Pointer to USB structure            826e5590
Pointer to saved device registers   826e4c80
Pointer to HCCA                     826f0400
HCCA PCI buss address               c00e0400
Controler revision                  00000110
Root hub address                    00000001
Number of ports                     00000002
Status change request queue
                            Flink    826fbe10
                            Blink    826fbe10
Connected end points queue
                            Flink    826dd1a0
                            Blink    826dd1a0
Free Endpoints queue
                            Flink    826f48c0
                            Blink    826f47c0
Count of free ED                    0000005d
Free transfer descriptor queue

Show OHCI
--------------------
                            Flink    826f29c0
                            Blink    826f3940
Count of free TD                    0000005c
Used transfer descriptor queue
                            Flink    826f200c
                            Blink    826f3a0c
Count of used TD                    00000023
Stalled endpoint descriptor queue
                            Flink    826dd1cc
                            Blink    826dd1cc
Running endpoint descriptor queue
                            Flink    826dd1d4
                            Blink    826dd1d4
Paused endpoint descriptor queue
                            Flink    826dd1dc
                            Blink    826dd1dc
ED lists will not be displayed
Frame Hight part                    01a28000


how OHCI
--------------------
Available Bandwidth                 00000064
Used Bandwidth                      00000000
SO count                            00000000
SO stall Frame                      00000000
SO Limit Frame                      00000000
SO Limit Hit                        00000000
SO Stall Hit                        00000000
UCM message mailbox                 00000000
Vendor ID                           00001080
Device ID                           0000c693
Map registers supported             00000001
BAP MIN                             0000000000000000
BAP MAX                             0000000000000000
BAP IN USE                          0000000000000000
BAP PEAK USE                        0000000000000000
DMA_MAPPED                          00000000000959ea
DMA_FREED                           fffffffffff6a617