/*	$NetBSD: plumpower.c,v 1.13 2012/10/27 17:17:53 chs 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 1.13 2012/10/27 17:17:53 chs Exp $");

#undef PLUMPOWERDEBUG

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.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_IO5CL1 |
	    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 */