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[5/7] serial: add pci-serial documentation

Message ID 1350460465-23536-6-git-send-email-kraxel@redhat.com
State New
Headers show

Commit Message

Gerd Hoffmann Oct. 17, 2012, 7:54 a.m. UTC 
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 docs/specs/pci-serial.txt |   34 ++++++++++++++++++++++++++++++++++
 hw/serial-pci.c           |    2 ++
 2 files changed, 36 insertions(+), 0 deletions(-)
 create mode 100644 docs/specs/pci-serial.txt
diff mbox

Patch

diff --git a/docs/specs/pci-serial.txt b/docs/specs/pci-serial.txt
new file mode 100644
index 0000000..66c761f
--- /dev/null
+++ b/docs/specs/pci-serial.txt
@@ -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.
diff --git a/hw/serial-pci.c b/hw/serial-pci.c
index badd297..95dc5c8 100644
--- a/hw/serial-pci.c
+++ b/hw/serial-pci.c
@@ -23,6 +23,8 @@ 
  * THE SOFTWARE.
  */
 
+/* see docs/specs/pci-serial.txt */
+
 #include "serial.h"
 #include "pci.h"