/*      $NetBSD: vrpmu.c,v 1.21 2022/07/21 10:09:21 andvar Exp $        */

/*
 * Copyright (c) 1999 M. Warner Losh.  All rights reserved.
 * Copyright (c) 2000 SATO Kazumi. All rights reserved.
 * Copyright (c) 1999,2000 PocketBSD Project. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vrpmu.c,v 1.21 2022/07/21 10:09:21 andvar Exp $");

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

#include <machine/bus.h>
#include <machine/config_hook.h>
#include <machine/debug.h>

#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/vrpmuvar.h>
#include <hpcmips/vr/vrpmureg.h>

#include "vrbcu.h"
#if NVRBCU > 0
#include <hpcmips/vr/bcuvar.h>
#include <hpcmips/vr/bcureg.h>
#endif

#ifdef VRPMUDEBUG
#define DEBUG_BOOT      0x1     /* boot time */
#define DEBUG_INTR      0x2     /* intr */
#define DEBUG_IO        0x4     /* I/O */
#ifndef VRPMUDEBUG_CONF
#define VRPMUDEBUG_CONF 0
#endif /* VRPMUDEBUG_CONF */
int vrpmudebug = VRPMUDEBUG_CONF;
#define DPRINTF(flag, arg) if (vrpmudebug&flag) printf arg;
#define DDUMP_INTR2(flag, arg1, arg2)                                   \
        if (vrpmudebug&flag) vrpmu_dump_intr2(arg1,arg2);
#define DDUMP_REGS(flag, arg) if (vrpmudebug&flag) vrpmu_dump_regs(arg);
#else /* VRPMUDEBUG */
#define DPRINTF(flag, arg)
#define DDUMP_INTR2(flag, arg1, arg2)
#define DDUMP_REGS(flag, arg)
#endif /* VRPMUDEBUG */

static int vrpmumatch(device_t, cfdata_t, void *);
static void vrpmuattach(device_t, device_t, void *);

static void vrpmu_write(struct vrpmu_softc *, int, unsigned short);
static unsigned short vrpmu_read(struct vrpmu_softc *, int);

int vrpmu_intr(void *);
void vrpmu_dump_intr(void *);
void vrpmu_dump_intr2(unsigned int, unsigned int);
void vrpmu_dump_regs(void *);

CFATTACH_DECL_NEW(vrpmu, sizeof(struct vrpmu_softc),
    vrpmumatch, vrpmuattach, NULL, NULL);

struct vrpmu_softc *this_pmu;

static inline void
vrpmu_write(struct vrpmu_softc *sc, int port, unsigned short val)
{

        bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
}

static inline unsigned short
vrpmu_read(struct vrpmu_softc *sc, int port)
{

        return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
}

static int
vrpmumatch(device_t parent, cfdata_t cf, void *aux)
{

        return (1);
}

static void
vrpmuattach(device_t parent, device_t self, void *aux)
{
        struct vrpmu_softc *sc = device_private(self);
        struct vrip_attach_args *va = aux;
#if NVRBCU > 0
        int cpuid;
#endif /* NVRBCU > 0 */

        bus_space_tag_t iot = va->va_iot;
        bus_space_handle_t ioh;

        if (bus_space_map(iot, va->va_addr, 1, 0, &ioh)) {
                printf(": can't map bus space\n");
                return;
        }

        sc->sc_iot = iot;
        sc->sc_ioh = ioh;

        if (!(sc->sc_handler = 
            vrip_intr_establish(va->va_vc, va->va_unit, 0, IPL_TTY,
                vrpmu_intr, sc))) {
                printf (": can't map interrupt line.\n");
                return;
        }
        if (!vrip_intr_establish(va->va_vc, va->va_unit, 1, IPL_TTY,
            vrpmu_intr, sc)) {
                printf (": can't map interrupt line.\n");
                return;
        }

        printf("\n");
        /* dump current interrupt states */
        vrpmu_dump_intr(sc);
        DDUMP_REGS(DEBUG_BOOT, sc);
        /* clear interrupt status */
        vrpmu_write(sc, PMUINT_REG_W, PMUINT_ALL);
        vrpmu_write(sc, PMUINT2_REG_W, PMUINT2_ALL);
#if NVRBCU > 0
        cpuid = vrbcu_vrip_getcpuid();
        if (cpuid >= BCUREVID_RID_4111){
                vrpmu_write(sc, PMUWAIT_REG_W, PMUWAIT_DEFAULT);
        }
#endif /* NVRBCU */

        this_pmu = sc;
}

/*
 * dump PMU intr status regs
 *
 */
void
vrpmu_dump_intr(void *arg)
{
        struct vrpmu_softc *sc = arg;
        unsigned int intstat1;
        unsigned int intstat2;

        intstat1 = vrpmu_read(sc, PMUINT_REG_W);
        intstat2 = vrpmu_read(sc, PMUINT2_REG_W);
        vrpmu_dump_intr2(intstat1, intstat2);
}

/*
 * dump PMU intr status regs
 */
void
vrpmu_dump_intr2(unsigned int intstat1, unsigned int intstat2)
{
        if (intstat1 & PMUINT_GPIO3)
                printf("vrpmu: GPIO[3] activation\n");
        if (intstat1 & PMUINT_GPIO2)
                printf("vrpmu: GPIO[2] activation\n");
        if (intstat1 & PMUINT_GPIO1)
                printf("vrpmu: GPIO[1] activation\n");
        if (intstat1 & PMUINT_GPIO0)
                printf("vrpmu: GPIO[0] activation\n");

        if (intstat1 & PMUINT_RTC)
                printf("vrpmu: RTC alarm detected\n");
        if (intstat1 & PMUINT_BATT)
                printf("vrpmu: Battery low during activation\n");

        if (intstat1 & PMUINT_TIMOUTRST)
                printf("vrpmu: HAL timer reset\n");
        if (intstat1 & PMUINT_RTCRST)
                printf("vrpmu: RTC reset detected\n");
        if (intstat1 & PMUINT_RSTSWRST)
                printf("vrpmu: RESET switch detected\n");
        if (intstat1 & PMUINT_DMSWRST)
                printf("vrpmu: Deadman's switch detected\n");
        if (intstat1 & PMUINT_BATTINTR)
                printf("vrpmu: Battery low during normal ops\n");
        if (intstat1 & PMUINT_POWERSW)
                printf("vrpmu: POWER switch detected\n");

        if (intstat2 & PMUINT_GPIO12)
                printf("vrpmu: GPIO[12] activation\n");
        if (intstat2 & PMUINT_GPIO11)
                printf("vrpmu: GPIO[11] activation\n");
        if (intstat2 & PMUINT_GPIO10)
                printf("vrpmu: GPIO[10] activation\n");
        if (intstat2 & PMUINT_GPIO9)
                printf("vrpmu: GPIO[9] activation\n");
}

/*
 * dump PMU registers
 *
 */
void
vrpmu_dump_regs(void *arg)
{
        struct vrpmu_softc *sc = arg;
        unsigned int reg;
#if NVRBCU > 0
        int cpuid;
#endif
        reg = vrpmu_read(sc, PMUINT_REG_W);
        reg = vrpmu_read(sc, PMUINT2_REG_W);

        /* others? XXXX */
        reg = vrpmu_read(sc, PMUCNT_REG_W);
        printf("vrpmu: cnt 0x%x: ", reg);
        dbg_bit_print(reg);
        reg = vrpmu_read(sc, PMUCNT2_REG_W);
        printf("vrpmu: cnt2 0x%x: ", reg);
        dbg_bit_print(reg);
#if NVRBCU > 0
        cpuid = vrbcu_vrip_getcpuid();
        if (cpuid >= BCUREVID_RID_4111){
                reg = vrpmu_read(sc, PMUWAIT_REG_W);
                printf("vrpmu: wait 0x%x", reg);
        }
        if (cpuid >= BCUREVID_RID_4121){
                reg = vrpmu_read(sc, PMUDIV_REG_W);
                printf(" div 0x%x", reg);
        }
        printf("\n");
#endif /*  NVRBCU > 0 */
}

/*
 * PMU interrupt handler.
 * XXX
 *
 * In the following interrupt routine we should actually DO something
 * with the knowledge that we've gained.  For now we just report it.
 */
int
vrpmu_intr(void *arg)
{
        struct vrpmu_softc *sc = arg;
        unsigned int intstat1;
        unsigned int intstat2;

        intstat1 = vrpmu_read(sc, PMUINT_REG_W);
        /* clear interrupt status */
        vrpmu_write(sc, PMUINT_REG_W, intstat1);


        intstat2 = vrpmu_read(sc, PMUINT2_REG_W);
        /* clear interrupt status */
        vrpmu_write(sc, PMUINT2_REG_W, intstat2);

        DDUMP_INTR2(DEBUG_INTR, intstat1, intstat2);

        if (intstat1 & PMUINT_GPIO3)
                ;
        if (intstat1 & PMUINT_GPIO2)
                ;
        if (intstat1 & PMUINT_GPIO1)
                ;
        if (intstat1 & PMUINT_GPIO0)
                ;

        if (intstat1 & PMUINT_RTC)
                ;
        if (intstat1 & PMUINT_BATT)
                config_hook_call(CONFIG_HOOK_PMEVENT,
                    CONFIG_HOOK_PMEVENT_SUSPENDREQ, NULL);
        if (intstat1 & PMUINT_TIMOUTRST)
                ;
        if (intstat1 & PMUINT_RTCRST)
                ;
        if (intstat1 & PMUINT_RSTSWRST)
                ;
        if (intstat1 & PMUINT_DMSWRST)
                ;
        if (intstat1 & PMUINT_BATTINTR)
                config_hook_call(CONFIG_HOOK_PMEVENT,
                    CONFIG_HOOK_PMEVENT_SUSPENDREQ, NULL);
        if (intstat1 & PMUINT_POWERSW) {
                /*
                 * you can't detect when the button is released
                 */
                config_hook_call(CONFIG_HOOK_BUTTONEVENT,
                    CONFIG_HOOK_BUTTONEVENT_POWER,
                    (void*)1 /* on */);
                config_hook_call(CONFIG_HOOK_BUTTONEVENT,
                    CONFIG_HOOK_BUTTONEVENT_POWER,
                    (void*)0 /* off */);
        }

        if (intstat2 & PMUINT_GPIO12)
                ;
        if (intstat2 & PMUINT_GPIO11)
                ;
        if (intstat2 & PMUINT_GPIO10)
                ;
        if (intstat2 & PMUINT_GPIO9)
                ;

        return (0);
}