/*      $NetBSD: plumpower.c,v 1.15 2024/09/07 14:28:19 andvar Exp $ */

/*-
 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by UCHIYAMA Yasushi.
 *
 * 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: plumpower.c,v 1.15 2024/09/07 14:28:19 andvar Exp $");

#undef PLUMPOWERDEBUG

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

#include <machine/bus.h>
#include <machine/intr.h>

#include <hpcmips/tx/tx39var.h>
#include <hpcmips/dev/plumvar.h>
#include <hpcmips/dev/plumpowervar.h>
#include <hpcmips/dev/plumpowerreg.h>

#ifdef PLUMPOWERDEBUG
int     plumpower_debug = 1;
#define DPRINTF(arg) if (plumpower_debug) printf arg;
#define DPRINTFN(n, arg) if (plumpower_debug > (n)) printf arg;
#else
#define DPRINTF(arg)
#define DPRINTFN(n, arg)
#endif

int     plumpower_match(device_t, cfdata_t, void *);
void    plumpower_attach(device_t, device_t, void *);

struct plumpower_softc {
        plum_chipset_tag_t      sc_pc;
        bus_space_tag_t         sc_regt;
        bus_space_handle_t      sc_regh;
};

CFATTACH_DECL_NEW(plumpower, sizeof(struct plumpower_softc),
    plumpower_match, plumpower_attach, NULL, NULL);

#ifdef PLUMPOWERDEBUG
static void     plumpower_dump(struct plumpower_softc *);
#endif

int
plumpower_match(device_t parent, cfdata_t cf, void *aux)
{
        return 2; /* 1st attach group */
}

void
plumpower_attach(device_t parent, device_t self, void *aux)
{
        struct plum_attach_args *pa = aux;
        struct plumpower_softc *sc = device_private(self);

        printf("\n");
        sc->sc_pc       = pa->pa_pc;
        sc->sc_regt     = pa->pa_regt;

        if (bus_space_map(sc->sc_regt, PLUM_POWER_REGBASE, 
            PLUM_POWER_REGSIZE, 0, &sc->sc_regh)) {
                printf(": register map failed\n");
                return;
        }
        plum_conf_register_power(sc->sc_pc, (void*)sc);
#ifdef PLUMPOWERDEBUG
        plumpower_dump(sc);
#endif
        /* disable all power/clock */
        plum_conf_write(sc->sc_regt, sc->sc_regh, 
            PLUM_POWER_PWRCONT_REG, 0);
        plum_conf_write(sc->sc_regt, sc->sc_regh, 
            PLUM_POWER_CLKCONT_REG, 0);

        /* enable MCS interface from TX3922 */
        plum_conf_write(sc->sc_regt, sc->sc_regh, PLUM_POWER_INPENA_REG,
            PLUM_POWER_INPENA);
}

void
plum_power_ioreset(plum_chipset_tag_t pc)
{
        struct plumpower_softc *sc = pc->pc_powert;     
        bus_space_tag_t regt = sc->sc_regt;
        bus_space_handle_t regh = sc->sc_regh;
        
        plum_conf_write(regt, regh, PLUM_POWER_RESETC_REG,
            PLUM_POWER_RESETC_IO5CL0 |
            PLUM_POWER_RESETC_IO5CL1);
        plum_conf_write(regt, regh, PLUM_POWER_RESETC_REG, 0);
}

void*
plum_power_establish(plum_chipset_tag_t pc, int src)
{
        struct plumpower_softc *sc = pc->pc_powert;
        bus_space_tag_t regt = sc->sc_regt;
        bus_space_handle_t regh = sc->sc_regh;
        plumreg_t pwrreg, clkreg;

        pwrreg = plum_conf_read(regt, regh, PLUM_POWER_PWRCONT_REG);
        clkreg = plum_conf_read(regt, regh, PLUM_POWER_CLKCONT_REG);
        
        switch(src) {
        default:
                panic("plum_power_establish: unknown power source");
        case PLUM_PWR_LCD:
                pwrreg |= PLUM_POWER_PWRCONT_LCDPWR;
                plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
                pwrreg |= PLUM_POWER_PWRCONT_LCDDSP;
                plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
                pwrreg |= PLUM_POWER_PWRCONT_LCDOE;
                break;
        case PLUM_PWR_BKL:
                pwrreg |= PLUM_POWER_PWRCONT_BKLIGHT;
                break;
        case PLUM_PWR_IO5:
                /* reset I/O bus (High/Low) */
                plum_power_ioreset(pc);

                /* supply power */
                pwrreg |= PLUM_POWER_PWRCONT_IO5PWR;
                plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);

                /* output enable & supply clock */
                pwrreg |= PLUM_POWER_PWRCONT_IO5OE;
                clkreg |= PLUM_POWER_CLKCONT_IO5CLK;
                break;
        case PLUM_PWR_EXTPW0:
                pwrreg |= PLUM_POWER_PWRCONT_EXTPW0;
                break;
        case PLUM_PWR_EXTPW1:
                pwrreg |= PLUM_POWER_PWRCONT_EXTPW1;
                break;
        case PLUM_PWR_EXTPW2:
                pwrreg |= PLUM_POWER_PWRCONT_EXTPW2;
                break;
        case PLUM_PWR_USB:
                /* output enable */
                pwrreg |= PLUM_POWER_PWRCONT_USBEN;
                /* supply clock to the USB host controller */
                clkreg |= PLUM_POWER_CLKCONT_USBCLK1;
                /* 
                 * clock supply is adaptively controlled by hardware 
                 * (recommended)
                 */
                clkreg &= ~PLUM_POWER_CLKCONT_USBCLK2; 
                break;
        case PLUM_PWR_SM:
                clkreg |= PLUM_POWER_CLKCONT_SMCLK;
                break;
        case PLUM_PWR_PCC1:
                clkreg |= PLUM_POWER_CLKCONT_PCCCLK1;
                break;
        case PLUM_PWR_PCC2:
                clkreg |= PLUM_POWER_CLKCONT_PCCCLK2;
                break;
        }

        plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
        plum_conf_write(regt, regh, PLUM_POWER_CLKCONT_REG, clkreg);
#ifdef PLUMPOWERDEBUG
        plumpower_dump(sc);
#endif
        return (void*)src;
}

void
plum_power_disestablish(plum_chipset_tag_t pc, int ph)
{
        struct plumpower_softc *sc = pc->pc_powert;
        bus_space_tag_t regt = sc->sc_regt;
        bus_space_handle_t regh = sc->sc_regh;
        int src = (int)ph;
        plumreg_t pwrreg, clkreg;

        pwrreg = plum_conf_read(regt, regh, PLUM_POWER_PWRCONT_REG);
        clkreg = plum_conf_read(regt, regh, PLUM_POWER_CLKCONT_REG);
        
        switch(src) {
        default:
                panic("plum_power_disestablish: unknown power source");
        case PLUM_PWR_LCD:
                pwrreg &= ~PLUM_POWER_PWRCONT_LCDOE;
                plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
                pwrreg &= ~PLUM_POWER_PWRCONT_LCDDSP;
                plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
                pwrreg &= ~PLUM_POWER_PWRCONT_LCDPWR;
                break;
        case PLUM_PWR_BKL:
                pwrreg &= ~PLUM_POWER_PWRCONT_BKLIGHT;
                break;
        case PLUM_PWR_IO5:
                pwrreg &= ~(PLUM_POWER_PWRCONT_IO5PWR |
                    PLUM_POWER_PWRCONT_IO5OE);
                clkreg &= ~PLUM_POWER_CLKCONT_IO5CLK;
                break;
        case PLUM_PWR_EXTPW0:
                pwrreg &= ~PLUM_POWER_PWRCONT_EXTPW0;
                break;
        case PLUM_PWR_EXTPW1:
                pwrreg &= ~PLUM_POWER_PWRCONT_EXTPW1;
                break;
        case PLUM_PWR_EXTPW2:
                pwrreg &= ~PLUM_POWER_PWRCONT_EXTPW2;
                break;
        case PLUM_PWR_USB:
                pwrreg &= ~PLUM_POWER_PWRCONT_USBEN;
                clkreg &= ~(PLUM_POWER_CLKCONT_USBCLK1 |
                    PLUM_POWER_CLKCONT_USBCLK2);
                break;
        case PLUM_PWR_SM:
                clkreg &= ~PLUM_POWER_CLKCONT_SMCLK;
                break;
        case PLUM_PWR_PCC1:
                clkreg &= ~PLUM_POWER_CLKCONT_PCCCLK1;
                break;
        case PLUM_PWR_PCC2:
                clkreg &= ~PLUM_POWER_CLKCONT_PCCCLK2;
                break;
        }

        plum_conf_write(regt, regh, PLUM_POWER_PWRCONT_REG, pwrreg);
        plum_conf_write(regt, regh, PLUM_POWER_CLKCONT_REG, clkreg);
#ifdef PLUMPOWERDEBUG
        plumpower_dump(sc);
#endif
}

#ifdef PLUMPOWERDEBUG
#define ISPOWERSUPPLY(r, m) dbg_bitmask_print(r, PLUM_POWER_PWRCONT_##m, #m)
#define ISCLOCKSUPPLY(r, m) dbg_bitmask_print(r, PLUM_POWER_CLKCONT_##m, #m)
static void
plumpower_dump(struct plumpower_softc *sc)
{
        bus_space_tag_t regt = sc->sc_regt;
        bus_space_handle_t regh = sc->sc_regh;
        plumreg_t reg;

        reg = plum_conf_read(regt, regh, PLUM_POWER_PWRCONT_REG);
        printf(" power:");
        ISPOWERSUPPLY(reg, USBEN);
        ISPOWERSUPPLY(reg, IO5OE);
        ISPOWERSUPPLY(reg, LCDOE);
        ISPOWERSUPPLY(reg, EXTPW2);
        ISPOWERSUPPLY(reg, EXTPW1);
        ISPOWERSUPPLY(reg, EXTPW0);
        ISPOWERSUPPLY(reg, IO5PWR);
        ISPOWERSUPPLY(reg, BKLIGHT);
        ISPOWERSUPPLY(reg, LCDPWR);
        ISPOWERSUPPLY(reg, LCDDSP);
        reg = plum_conf_read(regt, regh, PLUM_POWER_CLKCONT_REG);
        printf("\n clock:");
        ISCLOCKSUPPLY(reg, USBCLK2);
        ISCLOCKSUPPLY(reg, USBCLK1);
        ISCLOCKSUPPLY(reg, IO5CLK);
        ISCLOCKSUPPLY(reg, SMCLK);
        ISCLOCKSUPPLY(reg, PCCCLK2);
        ISCLOCKSUPPLY(reg, PCCCLK1);
        reg = plum_conf_read(regt, regh, PLUM_POWER_INPENA_REG);
        printf("\n MCS interface %sebled",
            reg & PLUM_POWER_INPENA ? "en" : "dis");
        reg = plum_conf_read(regt, regh, PLUM_POWER_RESETC_REG);
        printf("\n IO5 reset:%s %s",
            reg & PLUM_POWER_RESETC_IO5CL0 ? "CLRL" : "",
            reg & PLUM_POWER_RESETC_IO5CL1 ? "CLRH" : "");
        printf("\n");
}
#endif /* PLUMPOWERDEBUG */