>Number: 165804
>Category: kern
>Synopsis: [uart] [patch] Add support for MosChip MCS9904 PCIe x1 four
>serial ports controller
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 07 06:10:08 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Eugene Grosbein
>Release: FreeBSD 8.3-PRERELEASE i386
>Organization:
RDTC JSC
>Environment:
System: FreeBSD eg.sd.rdtc.ru 8.3-PRERELEASE FreeBSD 8.3-PRERELEASE #39: Wed
Mar 7 12:16:36 NOVT 2012 r...@eg.sd.rdtc.ru:/usr/local/obj/usr/local/src/sys/EG
i386
>Description:
uart(4) supports MosChip MCS9900/MCS9901 based controllers
but not MCS9904.
With following patch applied, all four serial ports are attached
and work just find.
>How-To-Repeat:
Use MosChip MCS9904-based PCIe x1 4-port serial card,
ports do not attach:
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci2: <ACPI PCI bus> on pcib2
pci2: <simple comms, UART> at device 0.0 (no driver attached)
pci2: <simple comms, UART> at device 0.1 (no driver attached)
pci2: <simple comms, UART> at device 0.2 (no driver attached)
pci2: <simple comms, UART> at device 0.3 (no driver attached)
>Fix:
Add card's PCI ID to uart(4) driver:
--- sys/dev/uart/uart_bus_pci.c.orig 2012-03-07 12:12:41.000000000 +0700
+++ sys/dev/uart/uart_bus_pci.c 2012-03-07 12:13:44.000000000 +0700
@@ -122,6 +122,8 @@
"MosChip MCS9900 PCIe to Peripheral Controller", 0x10 },
{ 0x9710, 0x9901, 0xa000, 0x1000,
"MosChip MCS9901 PCIe to Peripheral Controller", 0x10 },
+{ 0x9710, 0x9904, 0xa000, 0x1000,
+ "MosChip MCS9904 PCIe to Peripheral Controller", 0x10 },
{ 0xdeaf, 0x9051, 0xffff, 0, "Middle Digital PC Weasel Serial Port", 0x10 },
{ 0xffff, 0, 0xffff, 0, NULL, 0, 0}
};
>Release-Note:
>Audit-Trail:
>Unformatted:
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