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serial: add pci-serial documentation

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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2012-10-17 09:54:23 +02:00 committed by Anthony Liguori
parent d66bbea4e0
commit 90734e02bd
2 changed files with 36 additions and 0 deletions
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34
docs/specs/pci-serial.txt Normal file
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@ -0,0 +1,34 @@
QEMU pci serial devices
=======================
There is one single-port variant and two muliport-variants. Linux
guests out-of-the box with all cards. There is a Windows inf file
(docs/qemupciserial.inf) to setup the single-port card in Windows
guests.
single-port card
----------------
Name: pci-serial
PCI ID: 1b36:0002
PCI Region 0:
IO bar, 8 bytes long, with the 16550 uart mapped to it.
Interrupt is wired to pin A.
multiport cards
---------------
Name: pci-serial-2x
PCI ID: 1b36:0003
Name: pci-serial-4x
PCI ID: 1b36:0004
PCI Region 0:
IO bar, with two/four 16550 uart mapped after each other.
The first is at offset 0, second at offset 8, ...
Interrupt is wired to pin A.

2
hw/serial-pci.c
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@ -23,6 +23,8 @@
* THE SOFTWARE.
*/
/* see docs/specs/pci-serial.txt */
#include "serial.h"
#include "pci.h"