Tim Waugh (tim@cyberelk.demon.co.uk)
Mon, 14 Dec 1998 23:11:41 +0000 (GMT)
Hi guys,
At <URL:http://www.cyberelk.demon.co.uk/parport/parport_daisy.c>, you will
find the starting point for the 1284.3 code. It won't compile; it's
largely pseudo-code.
New functions in 1284.3:
int parport_daisy_init (void)
Called at initialisation time by parport_init.
struct pardevice *parport_open (int devnum, ...)
Just like parport_register_device, but instead of registering a device on
a port, you open a device with a particular "canonical device number".
This sets the daisy-chain address in the pardevice struct (not pictured).
void parport_close (struct pardevice *)
The converse of parport_open.
ssize_t parport_device_id (int devnum, char *buffer, size_t len)
Get the Device ID of device with canonical number devnum.
int parport_device_coords (int devnum, int *, int *, int*)
Get the adapter, mux port, and daisy chain address of device devnum.
int parport_device_num (int port, int mux, int daisy)
Converse of parport_device_coords.
I think that's all of them. Not shown are the planned changes to
parport_claim, which go something like:
if (port->muxport >= 0)
parport_select_port (port);
if (dev->daisy != port->daisy)
parport_select_device (dev);
Tim.
*/
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This archive was generated by hypermail 2.0b3 on Wed 30 Dec 1998 - 10:18:54 EST