/*      $NetBSD: vme_two.c,v 1.9 2021/12/05 07:21:59 msaitoh Exp $      */

/*-
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Steve C. Woodford.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/*
* VME support specific to the VMEchip2 found on all high-end MVME boards
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vme_two.c,v 1.9 2021/12/05 07:21:59 msaitoh Exp $");

#include "vmetwo.h"

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/cpu.h>
#include <sys/bus.h>

#include <dev/vme/vmereg.h>
#include <dev/vme/vmevar.h>

#include <dev/mvme/mvmebus.h>
#include <dev/mvme/vme_tworeg.h>
#include <dev/mvme/vme_twovar.h>

void vmetwo_master_range(struct vmetwo_softc *, int, struct mvmebus_range *);
void vmetwo_slave_range(struct vmetwo_softc *, int, vme_am_t,
       struct mvmebus_range *);

/* ARGSUSED */
void
vmetwo_init(struct vmetwo_softc *sc)
{
       u_int32_t reg;
       int i;

       /* Initialise stuff for the common mvmebus front-end */
       sc->sc_mvmebus.sc_chip = sc;
       sc->sc_mvmebus.sc_nmasters = VME2_NMASTERS;
       sc->sc_mvmebus.sc_masters = &sc->sc_master[0];
       sc->sc_mvmebus.sc_nslaves = VME2_NSLAVES;
       sc->sc_mvmebus.sc_slaves = &sc->sc_slave[0];
       sc->sc_mvmebus.sc_intr_establish = vmetwo_intr_establish;
       sc->sc_mvmebus.sc_intr_disestablish = vmetwo_intr_disestablish;

       /* Initialise interrupts */
       vmetwo_intr_init(sc);

       reg = vme2_lcsr_read(sc, VME2LCSR_BOARD_CONTROL);
       printf(": Type 2 VMEchip, scon jumper %s\n",
           (reg & VME2_BOARD_CONTROL_SCON) ? "enabled" : "disabled");

       /*
        * Figure out what bits of the VMEbus we can access.
        * First record the `fixed' maps (if they're enabled)
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_IO_CONTROL);
       if (reg & VME2_IO_CONTROL_I1EN) {
               /* This range is fixed to A16, DATA */
               sc->sc_master[0].vr_am = VME_AM_A16 | MVMEBUS_AM_CAP_DATA;

               /* However, SUPER/USER is selectable... */
               if (reg & VME2_IO_CONTROL_I1SU)
                       sc->sc_master[0].vr_am |= MVMEBUS_AM_CAP_SUPER;
               else
                       sc->sc_master[0].vr_am |= MVMEBUS_AM_CAP_USER;

               /* As is the datasize */
               sc->sc_master[0].vr_datasize = VME_D32 | VME_D16;
               if (reg & VME2_IO_CONTROL_I1D16)
                       sc->sc_master[0].vr_datasize &= ~VME_D32;

               sc->sc_master[0].vr_locstart = VME2_IO0_LOCAL_START;
               sc->sc_master[0].vr_mask = VME2_IO0_MASK;
               sc->sc_master[0].vr_vmestart = VME2_IO0_VME_START;
               sc->sc_master[0].vr_vmeend = VME2_IO0_VME_END;
       } else
               sc->sc_master[0].vr_am = MVMEBUS_AM_DISABLED;

       if (reg & VME2_IO_CONTROL_I2EN) {
               /* These two ranges are fixed to A24D16 and A32D16 */
               sc->sc_master[1].vr_am = VME_AM_A24;
               sc->sc_master[1].vr_datasize = VME_D16;
               sc->sc_master[2].vr_am = VME_AM_A32;
               sc->sc_master[2].vr_datasize = VME_D16;

               /* However, SUPER/USER is selectable */
               if (reg & VME2_IO_CONTROL_I2SU) {
                       sc->sc_master[1].vr_am |= MVMEBUS_AM_CAP_SUPER;
                       sc->sc_master[2].vr_am |= MVMEBUS_AM_CAP_SUPER;
               } else {
                       sc->sc_master[1].vr_am |= MVMEBUS_AM_CAP_USER;
                       sc->sc_master[2].vr_am |= MVMEBUS_AM_CAP_USER;
               }

               /* As is PROGRAM/DATA */
               if (reg & VME2_IO_CONTROL_I2PD) {
                       sc->sc_master[1].vr_am |= MVMEBUS_AM_CAP_PROG;
                       sc->sc_master[2].vr_am |= MVMEBUS_AM_CAP_PROG;
               } else {
                       sc->sc_master[1].vr_am |= MVMEBUS_AM_CAP_DATA;
                       sc->sc_master[2].vr_am |= MVMEBUS_AM_CAP_DATA;
               }

               sc->sc_master[1].vr_locstart = VME2_IO1_LOCAL_START;
               sc->sc_master[1].vr_mask = VME2_IO1_MASK;
               sc->sc_master[1].vr_vmestart = VME2_IO1_VME_START;
               sc->sc_master[1].vr_vmeend = VME2_IO1_VME_END;

               sc->sc_master[2].vr_locstart = VME2_IO2_LOCAL_START;
               sc->sc_master[2].vr_mask = VME2_IO2_MASK;
               sc->sc_master[2].vr_vmestart = VME2_IO2_VME_START;
               sc->sc_master[2].vr_vmeend = VME2_IO2_VME_END;
       } else {
               sc->sc_master[1].vr_am = MVMEBUS_AM_DISABLED;
               sc->sc_master[2].vr_am = MVMEBUS_AM_DISABLED;
       }

       /*
        * Now read the programmable maps
        */
       for (i = 0; i < VME2_MASTER_WINDOWS; i++)
               vmetwo_master_range(sc, i,
                   &(sc->sc_master[i + VME2_MASTER_PROG_START]));

       /* XXX: No A16 slave yet :XXX */
       sc->sc_slave[VME2_SLAVE_A16].vr_am = MVMEBUS_AM_DISABLED;

       for (i = 0; i < VME2_SLAVE_WINDOWS; i++) {
               vmetwo_slave_range(sc, i, VME_AM_A32,
                   &sc->sc_slave[i + VME2_SLAVE_PROG_START]);
               vmetwo_slave_range(sc, i, VME_AM_A24,
                   &sc->sc_slave[i + VME2_SLAVE_PROG_START + 2]);
       }

       mvmebus_attach(&sc->sc_mvmebus);
}

void
vmetwo_master_range(struct vmetwo_softc *sc, int range, struct mvmebus_range *vr)
{
       u_int32_t start, end, attr;
       u_int32_t reg;

       /*
        * First, check if the range is actually enabled...
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_MASTER_ENABLE);
       if ((reg & VME2_MASTER_ENABLE(range)) == 0) {
               vr->vr_am = MVMEBUS_AM_DISABLED;
               return;
       }

       /*
        * Fetch and record the range's attributes
        */
       attr = vme2_lcsr_read(sc, VME2LCSR_MASTER_ATTR);
       attr >>= VME2_MASTER_ATTR_AM_SHIFT(range);

       /*
        * Fix up the datasizes available through this range
        */
       vr->vr_datasize = VME_D32 | VME_D16;
       if (attr & VME2_MASTER_ATTR_D16)
               vr->vr_datasize &= ~VME_D32;
       attr &= VME2_MASTER_ATTR_AM_MASK;

       vr->vr_am = (attr & VME_AM_ADRSIZEMASK) | MVMEBUS_AM2CAP(attr);
       switch (vr->vr_am & VME_AM_ADRSIZEMASK) {
       case VME_AM_A32:
       default:
               vr->vr_mask = 0xffffffffu;
               break;

       case VME_AM_A24:
               vr->vr_mask = 0x00ffffffu;
               break;

       case VME_AM_A16:
               vr->vr_mask = 0x0000ffffu;
               break;
       }

       /*
        * XXX
        * It would be nice if users of the MI VMEbus code could pass down
        * whether they can tolerate Write-Posting to their device(s).
        * XXX
        */

       /*
        * Fetch the local-bus start and end addresses for the range
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_MASTER_ADDRESS(range));
       start = (reg & VME2_MAST_ADDRESS_START_MASK);
       start <<= VME2_MAST_ADDRESS_START_SHIFT;
       vr->vr_locstart = start & ~vr->vr_mask;
       end = (reg & VME2_MAST_ADDRESS_END_MASK);
       end <<= VME2_MAST_ADDRESS_END_SHIFT;
       end |= 0xffffu;
       end += 1;

       /*
        * Local->VMEbus map '4' has optional translation bits, so
        * the VMEbus start and end addresses may need to be adjusted.
        */
       if (range == 3 && (reg = vme2_lcsr_read(sc, VME2LCSR_MAST4_TRANS))!=0) {
               uint32_t addr, sel, len = end - start;

               reg = vme2_lcsr_read(sc, VME2LCSR_MAST4_TRANS);
               reg &= VME2_MAST4_TRANS_SELECT_MASK;
               sel = reg << VME2_MAST4_TRANS_SELECT_SHIFT;

               reg = vme2_lcsr_read(sc, VME2LCSR_MAST4_TRANS);
               reg &= VME2_MAST4_TRANS_ADDRESS_MASK;
               addr = reg << VME2_MAST4_TRANS_ADDRESS_SHIFT;

               start = (addr & sel) | (start & (~sel));
               end = start + len;
               vr->vr_mask &= len - 1;
       }

       /* XXX Deal with overlap of onboard RAM address space */
       /* XXX Then again, 167-Bug warns about this at setup time ... */

       /*
        * Fixup the addresses this range corresponds to
        */
       vr->vr_vmestart = start & vr->vr_mask;
       vr->vr_vmeend = (end - 1) & vr->vr_mask;
}

void
vmetwo_slave_range(struct vmetwo_softc *sc, int range, vme_am_t am, struct mvmebus_range *vr)
{
       u_int32_t reg;

       /*
        * First, check if the range is actually enabled.
        * Note that bit 1 of `range' is used to indicte if we're
        * looking for an A24 range (set) or an A32 range (clear).
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_SLAVE_CTRL);

       if (am == VME_AM_A32 && (reg & VME2_SLAVE_AMSEL_A32(range))) {
               vr->vr_am = VME_AM_A32;
               vr->vr_mask = 0xffffffffu;
       } else
       if (am == VME_AM_A24 && (reg & VME2_SLAVE_AMSEL_A24(range))) {
               vr->vr_am = VME_AM_A24;
               vr->vr_mask = 0x00ffffffu;
       } else {
               /* The range is not enabled */
               vr->vr_am = MVMEBUS_AM_DISABLED;
               return;
       }

       if ((reg & VME2_SLAVE_AMSEL_DAT(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_DATA;

       if ((reg & VME2_SLAVE_AMSEL_PGM(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_PROG;

       if ((reg & VME2_SLAVE_AMSEL_USR(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_USER;

       if ((reg & VME2_SLAVE_AMSEL_SUP(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_SUPER;

       if ((reg & VME2_SLAVE_AMSEL_BLK(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_BLK;

       if ((reg & VME2_SLAVE_AMSEL_BLKD64(range)) != 0)
               vr->vr_am |= MVMEBUS_AM_CAP_BLKD64;

       vr->vr_datasize = VME_D32 | VME_D16 | VME_D8;

       /*
        * Record the VMEbus start and end addresses of the slave image
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_SLAVE_ADDRESS(range));
       vr->vr_vmestart = reg & VME2_SLAVE_ADDRESS_START_MASK;
       vr->vr_vmestart <<= VME2_SLAVE_ADDRESS_START_SHIFT;
       vr->vr_vmestart &= vr->vr_mask;
       vr->vr_vmeend = reg & VME2_SLAVE_ADDRESS_END_MASK;
       vr->vr_vmeend <<= VME2_SLAVE_ADDRESS_END_SHIFT;
       vr->vr_vmeend &= vr->vr_mask;
       vr->vr_vmeend |= 0xffffu;

       /*
        * Now figure out the local-bus address
        */
       reg = vme2_lcsr_read(sc, VME2LCSR_SLAVE_CTRL);
       if ((reg & VME2_SLAVE_CTRL_ADDER(range)) != 0) {
               reg = vme2_lcsr_read(sc, VME2LCSR_SLAVE_TRANS(range));
               reg &= VME2_SLAVE_TRANS_ADDRESS_MASK;
               reg <<= VME2_SLAVE_TRANS_ADDRESS_SHIFT;
               vr->vr_locstart = vr->vr_vmestart + reg;
       } else {
               u_int32_t sel, addr;

               reg = vme2_lcsr_read(sc, VME2LCSR_SLAVE_TRANS(range));
               sel = reg & VME2_SLAVE_TRANS_SELECT_MASK;
               sel <<= VME2_SLAVE_TRANS_SELECT_SHIFT;
               addr = reg & VME2_SLAVE_TRANS_ADDRESS_MASK;
               addr <<= VME2_SLAVE_TRANS_ADDRESS_SHIFT;

               vr->vr_locstart = addr & sel;
               vr->vr_locstart |= vr->vr_vmestart & (~sel);
       }
}

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