Ok, I have now checked in the new maple autoconf code.

Since Jason never did give me the rundown of the correct "NetBSD way"
of doing it, I had to improvise.  The specific devices (mkbd and the
upcoming mmc (memorycard) driver) basically work like before, except
that multiple drivers can attach to the same unit (one per function
code).  The main change is that you can open the bus device itself as
a raw channel to a maple unit of choice.  The minor device number is
used to select the physical location of the unit you want to talk to
(port * 8 + subunit), and MAKEDEV has been updated to create device
nodes like /dev/mapleB2 for the second subunit slot on the unit
plugged into port B.  The only operation that can be done on the raw
maple device right now is the MAPLEIO_GDEVINFO ioctl, which gets the
devinfo struct.  Here's an example program that uses it:


---8<---
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <dreamcast/dev/maple/mapleio.h>

void describe_unit(char *name, struct maple_devinfo *info)
{
  printf("%s: %.*s\n", name,
	 (int)sizeof(info->di_product_name), info->di_product_name);
}

int main()
{
  int port;
  int subunit;
  char fn[16];
  int fd;
  struct maple_devinfo devinfo;

  for(port = 0; port < MAPLE_PORTS; port++)
    for(subunit = 0; subunit < MAPLE_SUBUNITS; subunit++) {
      if(subunit)
	sprintf(fn+11, "%d", subunit);
      else
	sprintf(fn, "/dev/maple%c", 'A'+port);
      if((fd = open(fn, O_RDONLY))>=0) {
	if(ioctl(fd, MAPLEIO_GDEVINFO, &devinfo)>=0)
	  describe_unit(fn+5, &devinfo);
	else
	  perror(fn);
	close(fd);
      } else if(errno != ENOENT && errno != ENXIO)
	perror(fn);
    }
  return 0;
}
---8<---

(I haven't added the header to the installed set yet, so you'll have
 to use -I/something/appropriate.)

As I said, specific devices still work the same, which means that
minor device numbers are allocated sequentially as needed.  I do
intend to add an ioctl to query the physical location though.


  // Marcus