/*      $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);
}

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