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/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: busses.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 4/90
*
* Generic autoconfiguration functions,
* usable to probe and attach devices
* on any bus that suits the generic bus
* structure, such as VME, TURBOChannel,
* and all the VAX busses.
*
*/
#include <string.h>
#include <kern/printf.h>
#include <mach/boolean.h>
#include <mach/std_types.h>
#include <chips/busses.h>
/*
* configure_bus_master
*
* Given the name of a bus_ctlr, look it up in the
* init table. If found, probe it. If there can be
* slaves attached, walk the device's init table
* for those that might be attached to this controller.
* Call the 'slave' function on each one to see if
* ok, then the 'attach' one.
*
* Returns 0 if the controller is not there.
*
*/
boolean_t configure_bus_master(
char *name,
vm_offset_t virt,
vm_offset_t phys,
int adpt_no,
char *bus_name)
{
register struct bus_device *device;
register struct bus_ctlr *master;
register struct bus_driver *driver;
boolean_t found = FALSE;
/*
* Match the name in the table, then pick the entry that has the
* right adaptor number, or one that has it wildcarded. Entries
* already allocated are marked alive, skip them.
*/
for (master = bus_master_init; master->driver; master++) {
if (master->alive)
continue;
if (((master->adaptor == adpt_no) || (master->adaptor == '?')) &&
(strcmp(master->name, name) == 0)) {
found = TRUE;
break;
}
}
if (!found)
return FALSE;
/*
* Found a match, probe it
*/
driver = master->driver;
if ((*driver->probe) (virt, master) == 0)
return FALSE;
master->alive = 1;
master->adaptor = adpt_no;
/*
* Remember which controller this device is attached to
*/
driver->minfo[master->unit] = master;
printf("%s%d: at %s%d\n", master->name, master->unit, bus_name, adpt_no);
/*
* Now walk all devices to check those that might be attached to this
* controller. We match the unallocated ones that have the right
* controller number, or that have a widcarded controller number.
*/
for (device = bus_device_init; device->driver; device++) {
int ctlr;
if (device->alive || device->driver != driver ||
(device->adaptor != '?' && device->adaptor != adpt_no))
continue;
ctlr = device->ctlr;
if (ctlr == '?') device->ctlr = master->unit;
/*
* A matching entry. See if the slave-probing routine is
* happy.
*/
if ((device->ctlr != master->unit) ||
((*driver->slave) (device, virt) == 0)) {
device->ctlr = ctlr;
continue;
}
device->alive = 1;
device->adaptor = adpt_no;
device->ctlr = master->unit;
/*
* Save a backpointer to the controller
*/
device->mi = master;
/*
* ..and to the device
*/
driver->dinfo[device->unit] = device;
if (device->slave >= 0)
printf(" %s%d: at %s%d slave %d",
device->name, device->unit,
driver->mname, master->unit, device->slave);
else
printf(" %s%d: at %s%d",
device->name, device->unit,
driver->mname, master->unit);
/*
* Now attach this slave
*/
(*driver->attach) (device);
printf("\n");
}
return TRUE;
}
/*
* configure_bus_device
*
* Given the name of a bus_device, look it up in the
* init table. If found, probe it. If it is present,
* call the driver's 'attach' function.
*
* Returns 0 if the device is not there.
*
*/
boolean_t configure_bus_device(
char *name,
vm_offset_t virt,
vm_offset_t phys,
int adpt_no,
char *bus_name)
{
register struct bus_device *device;
register struct bus_driver *driver;
boolean_t found = FALSE;
/*
* Walk all devices to find one with the right name
* and adaptor number (or wildcard). The entry should
* be unallocated, and also the slave number should
* be wildcarded.
*/
for (device = bus_device_init; device->driver; device++) {
if (device->alive)
continue;
if (((device->adaptor == adpt_no) || (device->adaptor == '?')) &&
(device->slave == -1) &&
((!device->phys_address) ||
((device->phys_address == phys) && (device->address == virt))) &&
(strcmp(device->name, name) == 0)) {
found = TRUE;
break;
}
}
if (!found)
return FALSE;
/*
* Found an entry, probe the device
*/
driver = device->driver;
if ((*driver->probe) (virt, (struct bus_ctlr *)device) == 0)
return FALSE;
device->alive = 1;
device->adaptor = adpt_no;
printf("%s%d: at %s%d", device->name, device->unit, bus_name, adpt_no);
/*
* Remember which driver this device is attached to
*/
driver->dinfo[device->unit] = device;
/*
* Attach the device
*/
(*driver->attach) (device);
printf("\n");
return TRUE;
}
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