/*      $NetBSD: pcctwo.c,v 1.13 2021/08/07 16:19:13 thorpej 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.
*/

/*
* PCCchip2 and MCchip Driver
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcctwo.c,v 1.13 2021/08/07 16:19:13 thorpej Exp $");

#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/mvme/pcctworeg.h>
#include <dev/mvme/pcctwovar.h>

/*
* Global Pointer to the PCCChip2/MCchip soft state, and chip ID
*/
struct pcctwo_softc *sys_pcctwo;

int pcctwoprint(void *, const char *);


/* ARGSUSED */
void
pcctwo_init(struct pcctwo_softc *sc, const struct pcctwo_device *pd, int devoff)
{
       struct pcctwo_attach_args npa;
       u_int8_t cid;

       /*
        * Fix up the vector base for PCCChip2 Interrupts
        */
       pcc2_reg_write(sc, PCC2REG_VECTOR_BASE, sc->sc_vecbase);

       /*
        * Enable PCCChip2 Interrupts
        */
       pcc2_reg_write(sc, PCC2REG_GENERAL_CONTROL,
           pcc2_reg_read(sc, PCC2REG_GENERAL_CONTROL) | PCCTWO_GEN_CTRL_MIEN);

       /* What are we? */
       cid = pcc2_reg_read(sc, PCC2REG_CHIP_ID);

       /*
        * Announce ourselves to the world in general
        */
       if (cid == PCCTWO_CHIP_ID_PCC2)
               printf(": Peripheral Channel Controller (PCCchip2), Rev %d\n",
                   pcc2_reg_read(sc, PCC2REG_CHIP_REVISION));
       else
       if (cid == PCCTWO_CHIP_ID_MCCHIP)
               printf(": Memory Controller ASIC (MCchip), Rev %d\n",
                   pcc2_reg_read(sc, PCC2REG_CHIP_REVISION));

       /*
        * Attach configured children.
        */
       npa._pa_base = devoff;
       while (pd->pcc_name != NULL) {
               /*
                * Note that IPL is filled in by match function.
                */
               npa.pa_name = pd->pcc_name;
               npa.pa_ipl = -1;
               npa.pa_dmat = sc->sc_dmat;
               npa.pa_bust = sc->sc_bust;
               npa.pa_offset = pd->pcc_offset + devoff;
               pd++;

               /* Attach the device if configured. */
               (void) config_found(sc->sc_dev, &npa, pcctwoprint, CFARGS_NONE);
       }
}

int
pcctwoprint(void *aux, const char *cp)
{
       struct pcctwo_attach_args *pa;

       pa = aux;

       if (cp)
               aprint_normal("%s at %s", pa->pa_name, cp);

       aprint_normal(" offset 0x%lx", pa->pa_offset - pa->_pa_base);
       if (pa->pa_ipl != -1)
               aprint_normal(" ipl %d", pa->pa_ipl);

       return (UNCONF);
}

/*
* pcctwointr_establish: Establish PCCChip2 Interrupt
*/
void
pcctwointr_establish(
       int vec,
       int (*hand)(void *),
       int lvl,
       void *arg,
       struct evcnt *evcnt)
{
       int vec2icsr;

#ifdef DEBUG
       if (vec < 0 || vec >= PCCTWOV_MAX) {
               printf("pcctwo: illegal vector offset: 0x%x\n", vec);
               panic("pcctwointr_establish");
       }
       if (lvl < 1 || lvl > 7) {
               printf("pcctwo: illegal interrupt level: %d\n", lvl);
               panic("pcctwointr_establish");
       }
       if (sys_pcctwo->sc_vec2icsr[vec] == -1) {
               printf("pcctwo: unsupported vector: %d\n", vec);
               panic("pcctwointr_establish");
       }
#endif

       vec2icsr = sys_pcctwo->sc_vec2icsr[vec];
       pcc2_reg_write(sys_pcctwo, VEC2ICSR_REG(vec2icsr), 0);

       /* Hook the interrupt */
       (*sys_pcctwo->sc_isrlink)(sys_pcctwo->sc_isrcookie, hand, arg,
           lvl, vec + sys_pcctwo->sc_vecbase, evcnt);

       /* Enable it in hardware */
       pcc2_reg_write(sys_pcctwo, VEC2ICSR_REG(vec2icsr),
           VEC2ICSR_INIT(vec2icsr) | lvl);
}

void
pcctwointr_disestablish(int vec)
{

#ifdef DEBUG
       if (vec < 0 || vec >= PCCTWOV_MAX) {
               printf("pcctwo: illegal vector offset: 0x%x\n", vec);
               panic("pcctwointr_disestablish");
       }
       if (sys_pcctwo->sc_vec2icsr[vec] == -1) {
               printf("pcctwo: unsupported vector: %d\n", vec);
               panic("pcctwointr_establish");
       }
#endif

       /* Disable it in hardware */
       pcc2_reg_write(sys_pcctwo, sys_pcctwo->sc_vec2icsr[vec], 0);

       (*sys_pcctwo->sc_isrunlink)(sys_pcctwo->sc_isrcookie,
           vec + sys_pcctwo->sc_vecbase);
}

struct evcnt *
pcctwointr_evcnt(int lev)
{

       return ((*sys_pcctwo->sc_isrevcnt)(sys_pcctwo->sc_isrcookie, lev));
}