device to be used as both a tty interface and as a synchronous
controller is a project for Linux post the 2.4 release
</para>
- <para>
- The support code handles most common card configurations and
- supports running both Cisco HDLC and Synchronous PPP. With extra
- glue the frame relay and X.25 protocols can also be used with this
- driver.
- </para>
</chapter>
<chapter id="Driver_Modes">
<para>
If you wish to use the network interface facilities of the driver,
then you need to attach a network device to each channel that is
- present and in use. In addition to use the SyncPPP and Cisco HDLC
+ present and in use. In addition to use the generic HDLC
you need to follow some additional plumbing rules. They may seem
complex but a look at the example hostess_sv11 driver should
reassure you.
</para>
<para>
The network device used for each channel should be pointed to by
- the netdevice field of each channel. The dev-> priv field of the
+ the netdevice field of each channel. The hdlc-> priv field of the
network device points to your private data - you will need to be
- able to find your ppp device from this. In addition to use the
- sync ppp layer the private data must start with a void * pointer
- to the syncppp structures.
+ able to find your private data from this.
</para>
<para>
The way most drivers approach this particular problem is to
create a structure holding the Z8530 device definition and
- put that and the syncppp pointer into the private field of
- the network device. The network device fields of the channels
- then point back to the network devices. The ppp_device can also
- be put in the private structure conveniently.
+ put that into the private field of the network device. The
+ network device fields of the channels then point back to the
+ network devices.
</para>
<para>
- If you wish to use the synchronous ppp then you need to attach
- the syncppp layer to the network device. You should do this before
- you register the network device. The
- <function>sppp_attach</function> requires that the first void *
- pointer in your private data is pointing to an empty struct
- ppp_device. The function fills in the initial data for the
- ppp/hdlc layer.
+ If you wish to use the generic HDLC then you need to register
+ the HDLC device.
</para>
<para>
Before you register your network device you will also need to
buffer in sk_buff format and queues it for transmission. The
caller must provide the entire packet with the exception of the
bitstuffing and CRC. This is normally done by the caller via
- the syncppp interface layer. It returns 0 if the buffer has been
- queued and non zero values for queue full. If the function accepts
- the buffer it becomes property of the Z8530 layer and the caller
- should not free it.
+ the generic HDLC interface layer. It returns 0 if the buffer has been
+ queued and non zero values for queue full. If the function accepts
+ the buffer it becomes property of the Z8530 layer and the caller
+ should not free it.
</para>
<para>
The function <function>z8530_get_stats</function> returns a pointer