xref: /src/sys/arch/amiga/amiga/autoconf.c

/*	$NetBSD: autoconf.c,v 1.52 1997/07/19 00:01:52 is Exp $	*/

/*
 * Copyright (c) 1994 Christian E. Hopps
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christian E. Hopps.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <machine/cpu.h>
#include <amiga/amiga/cfdev.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/custom.h>

void findroot __P((struct device **, int *));
void mbattach __P((struct device *, struct device *, void *));
int mbprint __P((void *, const char *));
int mbmatch __P((struct device *, struct cfdata *, void *));

int cold;	/* 1 if still booting */
#include <sys/kernel.h>

struct devnametobdevmaj amiga_nam2blk[] = {
	{ "fd",		2 },
	{ "sd",		4 },
	{ "cd",		7 },
#ifdef notyet
	{ "md",		XXX },
#endif
	{ NULL,		0 },
};
u_long boot_partition;

/*
 * called at boot time, configure all devices on system
 */
void
configure()
{
	int s;

	/*
	 * this is the real thing baby (i.e. not console init)
	 */
	amiga_realconfig = 1;
#ifdef DRACO
	if (is_draco()) {
		*draco_intena &= ~DRIRQ_GLOBAL;
	} else
#endif
	custom.intena = INTF_INTEN;
	s = splhigh();

	if (config_rootfound("mainbus", "mainbus") == NULL)
		panic("no mainbus found");

#ifdef DEBUG_KERNEL_START
	printf("survived autoconf, going to enable interrupts\n");
#endif

#ifdef DRACO
	if (is_draco()) {
		*draco_intena |= DRIRQ_GLOBAL;
		/* softints always enabled */
	} else
#endif
	{
		custom.intena = INTF_SETCLR | INTF_INTEN;

		/* also enable hardware aided software interrupts */
		custom.intena = INTF_SETCLR | INTF_SOFTINT;
	}
	splx(s);
#ifdef DEBUG_KERNEL_START
	printf("survived interrupt enable\n");
#endif
	cold = 0;
}

void
cpu_rootconf()
{
	struct device *booted_device;
	int booted_partition;

	findroot(&booted_device, &booted_partition);
#ifdef DEBUG_KERNEL_START
	printf("survived findroot()\n");
#endif
	setroot(booted_device, booted_partition, amiga_nam2blk);
#ifdef DEBUG_KERNEL_START
	printf("survived setroot()\n");
#endif
}

/*ARGSUSED*/
int
simple_devprint(auxp, pnp)
	void *auxp;
	const char *pnp;
{
	return(QUIET);
}

int
matchname(fp, sp)
	char *fp, *sp;
{
	int len;

	len = strlen(fp);
	if (strlen(sp) != len)
		return(0);
	if (bcmp(fp, sp, len) == 0)
		return(1);
	return(0);
}

/*
 * use config_search to find appropriate device, then call that device
 * directly with NULL device variable storage.  A device can then
 * always tell the difference betwean the real and console init
 * by checking for NULL.
 */
int
amiga_config_found(pcfp, pdp, auxp, pfn)
	struct cfdata *pcfp;
	struct device *pdp;
	void *auxp;
	cfprint_t pfn;
{
	struct device temp;
	struct cfdata *cf;

	if (amiga_realconfig)
		return(config_found(pdp, auxp, pfn) != NULL);

	if (pdp == NULL)
		pdp = &temp;

	pdp->dv_cfdata = pcfp;
	if ((cf = config_search((cfmatch_t)NULL, pdp, auxp)) != NULL) {
		cf->cf_attach->ca_attach(pdp, NULL, auxp);
		pdp->dv_cfdata = NULL;
		return(1);
	}
	pdp->dv_cfdata = NULL;
	return(0);
}

/*
 * this function needs to get enough configured to do a console
 * basically this means start attaching the grfxx's that support
 * the console. Kinda hacky but it works.
 */
void
config_console()
{
	struct cfdata *cf;

	/*
	 * we need mainbus' cfdata.
	 */
	cf = config_rootsearch(NULL, "mainbus", "mainbus");
	if (cf == NULL) {
		panic("no mainbus");
	}
	/*
	 * delay clock calibration.
	 */
	amiga_config_found(cf, NULL, "clock", NULL);

	/*
	 * internal grf.
	 */
#ifdef DRACO
	if (!(is_draco()))
#endif
		amiga_config_found(cf, NULL, "grfcc", NULL);
	/*
	 * zbus knows when its not for real and will
	 * only configure the appropriate hardware
	 */
	amiga_config_found(cf, NULL, "zbus", NULL);
}

/*
 * mainbus driver
 */
struct cfattach mainbus_ca = {
	sizeof(struct device), mbmatch, mbattach
};

struct cfdriver mainbus_cd = {
	NULL, "mainbus", DV_DULL, NULL, 0
};

int
mbmatch(pdp, cfp, auxp)
	struct device	*pdp;
	struct cfdata	*cfp;
	void		*auxp;
{

	if (cfp->cf_unit > 0)
		return(0);
	/*
	 * We are always here
	 */
	return(1);
}

/*
 * "find" all the things that should be there.
 */
void
mbattach(pdp, dp, auxp)
	struct device *pdp, *dp;
	void *auxp;
{
	printf("\n");
	config_found(dp, "clock", simple_devprint);
	if (is_a3000() || is_a4000()) {
		config_found(dp, "a34kbbc", simple_devprint);
	} else if (!is_draco() && !is_a1200()) {
		config_found(dp, "a2kbbc", simple_devprint);
	}
#ifdef DRACO
	if (is_draco()) {
		config_found(dp, "drbbc", simple_devprint);
		config_found(dp, "kbd", simple_devprint);
		config_found(dp, "drsc", simple_devprint);
		config_found(dp, "drcom", simple_devprint);
		config_found(dp, "drcom", simple_devprint);
		/*
		 * XXX -- missing here:
		 * SuperIO chip parallel, floppy
		 * or maybe just make that into a pseudo
		 * ISA bus.
		 */
	} else
#endif
	{
		config_found(dp, "ser", simple_devprint);
		config_found(dp, "par", simple_devprint);
		config_found(dp, "kbd", simple_devprint);
		config_found(dp, "ms", simple_devprint);
		config_found(dp, "ms", simple_devprint);
		config_found(dp, "grfcc", simple_devprint);
		config_found(dp, "fdc", simple_devprint);
	}
	if (is_a4000() || is_a1200())
		config_found(dp, "idesc", simple_devprint);
	if (is_a4000())			/* Try to configure A4000T SCSI */
		config_found(dp, "afsc", simple_devprint);
	config_found(dp, "zbus", simple_devprint);
	if (is_a3000())
		config_found(dp, "ahsc", simple_devprint);
}

int
mbprint(auxp, pnp)
	void *auxp;
	const char *pnp;
{
	if (pnp)
		printf("%s at %s", (char *)auxp, pnp);
	return(UNCONF);
}

/*
 * The system will assign the "booted device" indicator (and thus
 * rootdev if rootspec is wildcarded) to the first partition 'a'
 * in preference of boot.  However, it does walk unit backwards
 * to remain compatible with the old Amiga method of picking the
 * last root found.
 */
#include <sys/fcntl.h>		/* XXXX and all that uses it */
#include <sys/proc.h>		/* XXXX and all that uses it */

#include "fd.h"
#include "sd.h"
#include "cd.h"

#if NFD > 0
extern  struct cfdriver fd_cd;
#endif
#if NSD > 0
extern  struct cfdriver sd_cd;
#endif
#if NCD > 0
extern  struct cfdriver cd_cd;
#endif

struct cfdriver *genericconf[] = {
#if NFD > 0
	&fd_cd,
#endif
#if NSD > 0
	&sd_cd,
#endif
#if NCD > 0
	&cd_cd,
#endif
	NULL,
};

void
findroot(devpp, partp)
	struct device **devpp;
	int *partp;
{
	struct disk *dkp;
	struct partition *pp;
	struct device **devs;
	int i, maj, unit;

	/*
	 * Default to "not found".
	 */
	*devpp = NULL;

	/* always partition 'a' */
	*partp = 0;

#if NSD > 0
	/*
	 * If we have the boot partition offset (boot_partition), try
	 * to locate the device corresponding to that partition.
	 */
	if (boot_partition != 0) {
	 	struct bdevsw *bdp;

		for (unit = 0; unit < sd_cd.cd_ndevs; ++unit) {
			if (sd_cd.cd_devs[unit] == NULL)
				continue;

			/*
			 * Find the disk corresponding to the current
			 * device.
			 */
			devs = (struct device **)sd_cd.cd_devs;
			if ((dkp = disk_find(devs[unit]->dv_xname)) == NULL)
				continue;

			if (dkp->dk_driver == NULL ||
			    dkp->dk_driver->d_strategy == NULL)
				continue;
			for (bdp = bdevsw; bdp < (bdevsw + nblkdev); bdp++)
				if (bdp->d_strategy ==
				    dkp->dk_driver->d_strategy)
					break;
			if (bdp->d_open(MAKEDISKDEV(4, unit, 0),
			    FREAD | FNONBLOCK, 0, curproc))
				continue;
			bdp->d_close(MAKEDISKDEV(4, unit, 0),
			    FREAD | FNONBLOCK, 0, curproc);
			/*
			 * XXX - assumes booting only from 'a' partition
			 */
			pp = &dkp->dk_label->d_partitions[0];
			if (pp->p_size == 0 || pp->p_fstype != FS_BSDFFS)
				continue;
			if (pp->p_offset == boot_partition) {
				if (*devpp == NULL) {
					*devpp = devs[unit];
					*partp = 0;	/* XXX */
				} else
					printf("Ambiguous boot device\n");
			}
		}
	}
	if (*devpp != NULL)
		return;		/* we found the boot device */
#endif

	for (i = 0; genericconf[i] != NULL; i++) {
		for (unit = genericconf[i]->cd_ndevs - 1; unit >= 0; unit--) {
			if (genericconf[i]->cd_devs[unit] == NULL)
				continue;

			/*
			 * Find the disk structure corresponding to the
			 * current device.
			 */
			devs = (struct device **)genericconf[i]->cd_devs;
			if ((dkp = disk_find(devs[unit]->dv_xname)) == NULL)
				continue;

			if (dkp->dk_driver == NULL ||
			    dkp->dk_driver->d_strategy == NULL)
				continue;

			for (maj = 0; maj < nblkdev; maj++)
				if (bdevsw[maj].d_strategy ==
				    dkp->dk_driver->d_strategy)
					break;
#ifdef DIAGNOSTIC
			if (maj >= nblkdev)
				panic("findroot: impossible");
#endif

			/* Open disk; forces read of disklabel. */
			if ((*bdevsw[maj].d_open)(MAKEDISKDEV(maj,
			    unit, 0), FREAD|FNONBLOCK, 0, &proc0))
				continue;
			(void)(*bdevsw[maj].d_close)(MAKEDISKDEV(maj,
			    unit, 0), FREAD|FNONBLOCK, 0, &proc0);

			pp = &dkp->dk_label->d_partitions[0];
			if (pp->p_size != 0 && pp->p_fstype == FS_BSDFFS) {
				*devpp = devs[unit];
				*partp = 0;
				return;
			}
		}
	}
}

/*
 * Try to determine, of this machine is an A3000, which has a builtin
 * realtime clock and scsi controller, so that this hardware is only
 * included as "configured" if this IS an A3000
 */

int a3000_flag = 1;		/* patchable */
#ifdef A4000
int a4000_flag = 1;		/* patchable - default to A4000 */
#else
int a4000_flag = 0;		/* patchable */
#endif

int
is_a3000()
{
	/* this is a dirty kludge.. but how do you do this RIGHT ? :-) */
	extern long boot_fphystart;
	short sc;

	if ((machineid >> 16) == 3000)
		return (1);			/* It's an A3000 */
	if (machineid >> 16)
		return (0);			/* It's not an A3000 */
	/* Machine type is unknown, so try to guess it */
	/* where is fastram on the A4000 ?? */
	/* if fastram is below 0x07000000, assume it's not an A3000 */
	if (boot_fphystart < 0x07000000)
		return(0);
	/*
	 * OK, fastram starts at or above 0x07000000, check specific
	 * machines
	 */
	for (sc = 0; sc < ncfdev; sc++) {
		switch (cfdev[sc].rom.manid) {
		case 2026:		/* Progressive Peripherals, Inc */
			switch (cfdev[sc].rom.prodid) {
			case 0:		/* PPI Mercury - A3000 */
			case 1:		/* PP&S A3000 '040 */
				return(1);
			case 150:	/* PPI Zeus - it's an A2000 */
			case 105:	/* PP&S A2000 '040 */
			case 187:	/* PP&S A500 '040 */
				return(0);
			}
			break;

		case 2112:			/* IVS */
			switch (cfdev[sc].rom.prodid) {
			case 242:
				return(0);	/* A2000 accelerator? */
			}
			break;
		}
	}
	return (a3000_flag);		/* XXX let flag tell now */
}

int
is_a4000()
{
	if ((machineid >> 16) == 4000)
		return (1);		/* It's an A4000 */
	if ((machineid >> 16) == 1200)
		return (0);		/* It's an A1200, so not A4000 */
#ifdef DRACO
	if (is_draco())
		return (0);
#endif
	/* Do I need this any more? */
	if ((custom.deniseid & 0xff) == 0xf8)
		return (1);
#ifdef DEBUG
	if (a4000_flag)
		printf("Denise ID = %04x\n", (unsigned short)custom.deniseid);
#endif
	if (machineid >> 16)
		return (0);		/* It's not an A4000 */
	return (a4000_flag);		/* Machine type not set */
}

int
is_a1200()
{
	if ((machineid >> 16) == 1200)
		return (1);		/* It's an A1200 */
	return (0);			/* Machine type not set */
}

#ifdef DRACO
int
is_draco()
{
	if ((machineid >> 24) == 0x7D)
		return ((machineid >> 16) & 0xFF);
	return (0);
}
#endif