/*      $NetBSD: autoconf.c,v 1.11 2023/10/14 08:05:25 andvar 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.11 2023/10/14 08:05:25 andvar Exp $");

#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/device_impl.h>    /* XXX autoconf abuse */
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/cpu.h>

#include <amiga/amiga/cfdev.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/custom.h>

static void findroot(void);

u_long boot_partition;

int amiga_realconfig;

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

        /*
         * this is the real thing baby (i.e. not console init)
         */
        amiga_realconfig = 1;
        custom.intena = INTF_INTEN;

        if (config_rootfound("mainbus", NULL) == NULL)
                panic("configure: mainbus not configured");

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

        genppc_cpu_configure();
        custom.intena = INTF_SETCLR | INTF_INTEN;

#ifdef DEBUG_KERNEL_START
        printf("survived configure...\n");
#endif
}

void
cpu_rootconf(void)
{

        findroot();
#ifdef DEBUG_KERNEL_START
        printf("survived findroot()\n");
#endif
        rootconf();
}

/*ARGSUSED*/
int
simple_devprint(void *aux, const char *pnp)
{

        return QUIET;
}

int
matchname(const char *fp, const char *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_ia to find appropriate device, then call that device
 * directly with NULL device variable storage.  A device can then
 * always tell the difference between the real and console init
 * by checking for NULL.
 */
int
amiga_config_found(cfdata_t pcfp, device_t parent, void *aux, cfprint_t pfn,
    const struct cfargs *cfargs)
{
        struct device temp;
        cfdata_t cf;
        const struct cfattach *ca;
        int rv = 0;

        if (amiga_realconfig) {
                rv = config_found(parent, aux, pfn, cfargs) != NULL;
                goto out;
        }

        if (parent == NULL) {
                memset(&temp, 0, sizeof temp);
                parent = &temp;
        }

        parent->dv_cfdata = pcfp;
        parent->dv_cfdriver = config_cfdriver_lookup(pcfp->cf_name);
        parent->dv_unit = pcfp->cf_unit;

        if ((cf = config_search(parent, aux,  cfargs)) != NULL) {
                ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname);
                if (ca != NULL) {
                        (*ca->ca_attach)(parent, NULL, aux);
                        rv = 1;
                }
        }
        parent->dv_cfdata = NULL;
 out:
        return rv;
}

/*
 * 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(void)
{
        cfdata_t cf;

        config_init();

        /*
         * we need mainbus' cfdata.
         */
        cf = config_rootsearch(NULL, "mainbus", NULL);
        if (cf == NULL)
                panic("no mainbus");

        /*
         * internal grf.
         */
        amiga_config_found(cf, NULL, __UNCONST("grfcc"), NULL, CFARGS_NONE);

        /*
         * zbus knows when its not for real and will
         * only configure the appropriate hardware
         */
        amiga_config_found(cf, NULL, __UNCONST("zbus"), NULL, CFARGS_NONE);
}

/*
 * 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"
#include "wd.h"

#if NFD > 0
extern  struct cfdriver fd_cd;
extern  const struct bdevsw fd_bdevsw;
#endif
#if NSD > 0
extern  struct cfdriver sd_cd;
extern  const struct bdevsw sd_bdevsw;
#endif
#if NCD > 0
extern  struct cfdriver cd_cd;
extern  const struct bdevsw cd_bdevsw;
#endif
#if NWD > 0
extern  struct cfdriver wd_cd;
extern  const struct bdevsw wd_bdevsw;
#endif

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

void
findroot(void)
{
        struct disk *dkp;
        struct partition *pp;
        device_t*devs;
        int i, maj, unit;
        const struct bdevsw *bdp;

#if NSD > 0
        /*
         * If we have the boot partition offset (boot_partition), try
         * to locate the device corresponding to that partition.
         */
#ifdef DEBUG_KERNEL_START
        printf("Boot partition offset is %ld\n", boot_partition);
#endif
        if (boot_partition != 0) {

                for (unit = 0; unit < sd_cd.cd_ndevs; ++unit) {
#ifdef DEBUG_KERNEL_START
                        printf("probing for sd%d\n", unit);
#endif
                        if (sd_cd.cd_devs[unit] == NULL)
                                continue;

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

                        if (dkp->dk_driver == NULL ||
                            dkp->dk_driver->d_strategy == NULL)
                                continue;
                        bdp = &sd_bdevsw;
                        maj = bdevsw_lookup_major(bdp);
                        if ((*bdp->d_open)(MAKEDISKDEV(maj, unit, RAW_PART),
                            FREAD | FNONBLOCK, 0, curlwp))
                                continue;
                        (*bdp->d_close)(MAKEDISKDEV(maj, unit, RAW_PART),
                            FREAD | FNONBLOCK, 0, curlwp);
                        pp = &dkp->dk_label->d_partitions[0];
                        for (i = 0; i < dkp->dk_label->d_npartitions;
                            i++, pp++) {
#ifdef DEBUG_KERNEL_START
                                printf("sd%d%c type %d offset %d size %d\n",
                                        unit, i+'a', pp->p_fstype,
                                        pp->p_offset, pp->p_size);
#endif
                                if (pp->p_size == 0 ||
                                    (pp->p_fstype != FS_BSDFFS &&
                                    pp->p_fstype != FS_SWAP))
                                        continue;
                                if (pp->p_offset == boot_partition) {
                                        if (booted_device == NULL) {
                                                booted_device = devs[unit];
                                                booted_partition = i;
                                        } else
                                                printf("Ambiguous boot device\n");
                                }
                        }
                }
        }
        if (booted_device != 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 = genericconf[i]->cd_devs;
                        if ((dkp = disk_find(device_xname(devs[unit]))) == NULL)
                                continue;

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

                        bdp = NULL;
#if NFD > 0
                        if (fd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
                                bdp = &fd_bdevsw;
#endif
#if NSD > 0
                        if (sd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
                                bdp = &sd_bdevsw;
#endif
#if NWD > 0
                        if (wd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
                                bdp = &wd_bdevsw;
#endif
#if NCD > 0
                        if (cd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
                                bdp = &cd_bdevsw;
#endif
#ifdef DIAGNOSTIC
                        if (bdp == NULL)
                                panic("findroot: impossible");
#endif
                        maj = bdevsw_lookup_major(bdp);

                        /* Open disk; forces read of disklabel. */
                        if ((*bdp->d_open)(MAKEDISKDEV(maj,
                            unit, 0), FREAD|FNONBLOCK, 0, &lwp0))
                                continue;
                        (void)(*bdp->d_close)(MAKEDISKDEV(maj,
                            unit, 0), FREAD|FNONBLOCK, 0, &lwp0);

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

/*
 * Try to determine, if 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(void)
{
        /* 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(void)
{

        if ((machineid >> 16) == 4000)
                return 1;               /* It's an A4000 */
        if ((machineid >> 16) == 1200)
                return 0;               /* It's an A1200, so not A4000 */
        /* 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(void)
{

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