hi Maintainers,
I'm developing a driver for the tascam us428 audio/midi controller. it works
on intel USB BX440 Host controller, but has problems with one VIA USB
Controller (others unknown).
kernel is 2.4.21. module is uhci. (usb-uhci behaves similarly.)
the error shows up like this:
uhci.c: uhci_result_interrupt/bulk() failed with status 44
[cf7a50c0] link (0f7a5092) element (02ecf1e0)
0: [c2ecf1e0] link (0001) e0 IOC Stalled CRC/Timeo Length=7ff MaxLen=3f
DT0 EndPt=6 Dev=2, PID=69(IN) (buf=0e01cc54)
the FIX is to initialise status in uhci_submit_bulk() like this:
/* 3 errors if there is a timeout else 0;
UHCI Spec says: 0 == unlimited errors
VIA-chip 1106:3038 needs 0 for urbs that should not timeout!
*/
status = TD_CTRL_ACTIVE | ((urb-timeout ? 3 : 0) TD_CTRL_C_ERR_SHIFT);
the urb in question should stay in the queue until the extern midi device
submits an event.
It seams intels HC ignores the spec, while Via's obeys here?
Please apply the fix in uhci.c, usb-uhci.c and for 2.6!
thanks, karsten
some details:
lspci -n for the VIA Board:
00:00.0 Class 0600: 1106:0691 (rev c4)
00:01.0 Class 0604: 1106:8598
00:07.0 Class 0601: 1106:0686 (rev 40)
00:07.1 Class 0101: 1106:0571 (rev 06)
00:07.2 Class 0c03: 1106:3038 (rev 1a)
00:07.3 Class 0c03: 1106:3038 (rev 1a)
00:07.4 Class 0680: 1106:3057 (rev 40)
00:07.5 Class 0401: 1106:3058 (rev 50)
00:09.0 Class 0100: 1000:000f (rev 03)
00:0a.0 Class 0200: 8086:1229 (rev 08)
01:00.0 Class 0300: 1002:4c42 (rev dc)
lspci -v for the VIA Board:
00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x]
(rev c4)
Flags: bus master, medium devsel, latency 8
Memory at e000 (32-bit, prefetchable) [size=32M]
Capabilities: available only to root
00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x
AGP] (prog-if 00 [Normal decode])
Flags: bus master, 66Mhz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: c000-cfff
Memory behind bridge: e200-e3ff
Capabilities: available only to root
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev
40)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
Flags: bus master, stepping, medium devsel, latency 0
Capabilities: available only to root
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586/B/686A/B PIPC Bus
Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
Subsystem: VIA Technologies, Inc. VT8235 Bus Master ATA133/100/66/33
IDE
Flags: bus master, medium devsel, latency 32
I/O ports at d000 [size=16]
Capabilities: available only to root
00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 1a) (prog-if 00
[UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Flags: bus master, medium devsel, latency 32, IRQ 5
I/O ports at d400 [size=32]
Capabilities: available only to root
00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 1a) (prog-if 00
[UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Flags: bus master, medium devsel, latency 32, IRQ 5
I/O ports at d800 [size=32]
Capabilities: available only to root
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
Subsystem: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
Flags: medium devsel, IRQ 9
Capabilities: available only to root
00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97
Audio Controller (rev 50)
Subsystem: VIA Technologies, Inc. VT82C686 AC97 Audio Controller
Flags: medium devsel, IRQ 10
I/O ports at dc00 [size=256]
I/O ports at e000 [size=4]
I/O ports at e400 [size=4]
Capabilities: available only to root
00:09.0 SCSI storage controller: LSI Logic / Symbios Logic 53c875 (rev 03)
Flags: bus master, medium devsel, latency 134, IRQ 11
I/O ports at e800 [size=256]
Memory at e4202000 (32-bit, non-prefetchable) [size=256]
Memory at e4201000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at unassigned [disabled] [size=64K]
00:0a.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08)
Subsystem: Intel Corp. EtherExpress PRO/100+ Management Adapter
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at e420 (32-bit, non-prefetchable) [size=4K]
I/O ports at ec00 [size=64]
Memory at e400 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at unassigned [disabled] [size=1M]
Capabilities: available only to root
01:00.0 VGA compatible controller: ATI Technologies Inc 3D Rage LT Pro AGP-133
(rev dc) (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc Rage LT Pro AGP 2X
Flags: bus master, stepping, medium
