freebsd-skq/sys/pccard/pcic.c

/*
 *  Intel PCIC or compatible Controller driver
 *-------------------------------------------------------------------------
 *
 * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
 * Copyright (c) 1995 Andrew McRae.  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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>

#include <machine/clock.h>
#include <pccard/i82365.h>
#include <pccard/pcic_pci.h>
#include <pccard/cardinfo.h>
#include <pccard/slot.h>
#include <pccard/pcicvar.h>

/* Get pnp IDs */
#include <isa/isavar.h>
#include <dev/pcic/i82365reg.h>

#include <dev/pccard/pccardvar.h>
#include "card_if.h"

/*
 *	Prototypes for interrupt handler.
 */
static int		pcic_ioctl(struct slot *, int, caddr_t);
static int		pcic_power(struct slot *);
static void		pcic_mapirq(struct slot *, int);
static timeout_t 	pcic_reset;
static void		pcic_resume(struct slot *);
static void		pcic_disable(struct slot *);
static int		pcic_memory(struct slot *, int);
static int		pcic_io(struct slot *, int);

devclass_t	pcic_devclass;

static struct slot_ctrl pcic_cinfo = {
	pcic_mapirq,
	pcic_memory,
	pcic_io,
	pcic_reset,
	pcic_disable,
	pcic_power,
	pcic_ioctl,
	pcic_resume,
	PCIC_MEM_WIN,
	PCIC_IO_WIN
};

/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, pcic, CTLFLAG_RD, 0, "PCIC parameters");

int pcic_override_irq = 0;
TUNABLE_INT("machdep.pccard.pcic_irq", &pcic_override_irq);
TUNABLE_INT("hw.pcic.irq", &pcic_override_irq);
SYSCTL_INT(_hw_pcic, OID_AUTO, irq, CTLFLAG_RD,
    &pcic_override_irq, 0,
    "Override the IRQ configured by the config system for all pcic devices");

int pcic_boot_deactivated = 0;
TUNABLE_INT("hw.pcic.boot_deactivated", &pcic_boot_deactivated);
SYSCTL_INT(_hw_pcic, OID_AUTO, boot_deactivated, CTLFLAG_RD,
    &pcic_boot_deactivated, 0,
    "Override the automatic powering up of pccards at boot.");

/*
 * Read a register from the PCIC.
 */
unsigned char
pcic_getb_io(struct pcic_slot *sp, int reg)
{
	bus_space_write_1(sp->bst, sp->bsh, PCIC_INDEX, sp->offset + reg);
	return (bus_space_read_1(sp->bst, sp->bsh, PCIC_DATA));
}

/*
 * Write a register on the PCIC
 */
void
pcic_putb_io(struct pcic_slot *sp, int reg, unsigned char val)
{
	/*
	 * Many datasheets recommend using outw rather than outb to save 
	 * a microsecond.  Maybe we should do this, but we'd likely only
	 * save 20-30us on card activation.
	 */
	bus_space_write_1(sp->bst, sp->bsh, PCIC_INDEX, sp->offset + reg);
	bus_space_write_1(sp->bst, sp->bsh, PCIC_DATA, val);
}

/*
 * Clear bit(s) of a register.
 */
__inline void
pcic_clrb(struct pcic_slot *sp, int reg, unsigned char mask)
{
	sp->putb(sp, reg, sp->getb(sp, reg) & ~mask);
}

/*
 * Set bit(s) of a register
 */
__inline void
pcic_setb(struct pcic_slot *sp, int reg, unsigned char mask)
{
	sp->putb(sp, reg, sp->getb(sp, reg) | mask);
}

/*
 * Write a 16 bit value to 2 adjacent PCIC registers
 */
static __inline void
pcic_putw(struct pcic_slot *sp, int reg, unsigned short word)
{
	sp->putb(sp, reg, word & 0xFF);
	sp->putb(sp, reg + 1, (word >> 8) & 0xff);
}

/*
 * pc98 cbus cards introduce a slight wrinkle here.  They route the irq7 pin
 * from the pcic chip to INT 2 on the cbus.  INT 2 is normally mapped to
 * irq 6 on the pc98 architecture, so if we get a request for irq 6
 * lie to the hardware and say it is 7.  All the other usual mappings for
 * cbus INT into irq space are the same as the rest of the system.
 */
static __inline int
host_irq_to_pcic(int irq)
{
#ifdef PC98
	if (irq == 6)
		irq = 7;
#endif
	return (irq);
}

/*
 * Free up resources allocated so far.
 */
void
pcic_dealloc(device_t dev)
{
	struct pcic_softc *sc;

	sc = (struct pcic_softc *) device_get_softc(dev);
	if (sc->slot_poll)
		untimeout(sc->slot_poll, sc, sc->timeout_ch);
	if (sc->iores)
		bus_release_resource(dev, SYS_RES_IOPORT, sc->iorid,
		    sc->iores);
	if (sc->memres)
		bus_release_resource(dev, SYS_RES_MEMORY, sc->memrid,
		    sc->memres);
	if (sc->ih)
		bus_teardown_intr(dev, sc->irqres, sc->ih);
	if (sc->irqres)
		bus_release_resource(dev, SYS_RES_IRQ, sc->irqrid, sc->irqres);
}

/*
 *	entry point from main code to map/unmap memory context.
 */
static int
pcic_memory(struct slot *slt, int win)
{
	struct pcic_slot *sp = slt->cdata;
	struct mem_desc *mp = &slt->mem[win];
	int reg = win * PCIC_MEMSIZE + PCIC_MEMBASE;

	if (win < 0 || win >= slt->ctrl->maxmem) {
		printf("Illegal PCIC MEMORY window request %d\n", win);
		return (ENXIO);
	}
	if (mp->flags & MDF_ACTIVE) {
		unsigned long sys_addr = (uintptr_t)(void *)mp->start >> 12;
		/*
		 * Write the addresses, card offsets and length.
		 * The values are all stored as the upper 12 bits of the
		 * 24 bit address i.e everything is allocated as 4 Kb chunks.
		 */
		pcic_putw(sp, reg, sys_addr & 0xFFF);
		pcic_putw(sp, reg+2, (sys_addr + (mp->size >> 12) - 1) & 0xFFF);
		pcic_putw(sp, reg+4, ((mp->card >> 12) - sys_addr) & 0x3FFF);
		/*
		 *	Each 16 bit register has some flags in the upper bits.
		 */
		if (mp->flags & MDF_16BITS)
			pcic_setb(sp, reg+1, PCIC_DATA16);
		if (mp->flags & MDF_ZEROWS)
			pcic_setb(sp, reg+1, PCIC_ZEROWS);
		if (mp->flags & MDF_WS0)
			pcic_setb(sp, reg+3, PCIC_MW0);
		if (mp->flags & MDF_WS1)
			pcic_setb(sp, reg+3, PCIC_MW1);
		if (mp->flags & MDF_ATTR)
			pcic_setb(sp, reg+5, PCIC_REG);
		if (mp->flags & MDF_WP)
			pcic_setb(sp, reg+5, PCIC_WP);
		/*
		 * Enable the memory window. By experiment, we need a delay.
		 */
		pcic_setb(sp, PCIC_ADDRWINE, (1<<win) | PCIC_MEMCS16);
		DELAY(50);
	} else {
		pcic_clrb(sp, PCIC_ADDRWINE, 1<<win);
		pcic_putw(sp, reg, 0);
		pcic_putw(sp, reg+2, 0);
		pcic_putw(sp, reg+4, 0);
	}
	return (0);
}

/*
 *	pcic_io - map or unmap I/O context
 */
static int
pcic_io(struct slot *slt, int win)
{
	int	mask, reg;
	struct pcic_slot *sp = slt->cdata;
	struct io_desc *ip = &slt->io[win];
	if (bootverbose) {
		printf("pcic: I/O win %d flags %x %x-%x\n", win, ip->flags,
		    ip->start, ip->start + ip->size - 1);
	}

	switch (win) {
	case 0:
		mask = PCIC_IO0_EN;
		reg = PCIC_IO0;
		break;
	case 1:
		mask = PCIC_IO1_EN;
		reg = PCIC_IO1;
		break;
	default:
		printf("Illegal PCIC I/O window request %d\n", win);
		return (ENXIO);
	}
	if (ip->flags & IODF_ACTIVE) {
		unsigned char x, ioctlv;

		pcic_putw(sp, reg, ip->start);
		pcic_putw(sp, reg+2, ip->start + ip->size - 1);
		x = 0;
		if (ip->flags & IODF_ZEROWS)
			x |= PCIC_IO_0WS;
		if (ip->flags & IODF_WS)
			x |= PCIC_IO_WS;
		if (ip->flags & IODF_CS16)
			x |= PCIC_IO_CS16;
		if (ip->flags & IODF_16BIT)
			x |= PCIC_IO_16BIT;
		/*
		 * Extract the current flags and merge with new flags.
		 * Flags for window 0 in lower nybble, and in upper nybble
		 * for window 1.
		 */
		ioctlv = sp->getb(sp, PCIC_IOCTL);
		DELAY(100);
		switch (win) {
		case 0:
			sp->putb(sp, PCIC_IOCTL, x | (ioctlv & 0xf0));
			break;
		case 1:
			sp->putb(sp, PCIC_IOCTL, (x << 4) | (ioctlv & 0xf));
			break;
		}
		DELAY(100);
		pcic_setb(sp, PCIC_ADDRWINE, mask);
		DELAY(100);
	} else {
		pcic_clrb(sp, PCIC_ADDRWINE, mask);
		DELAY(100);
		pcic_putw(sp, reg, 0);
		pcic_putw(sp, reg + 2, 0);
	}
	return (0);
}

static void
pcic_do_mgt_irq(struct pcic_slot *sp, int irq)
{
	u_int32_t	reg;

	if (sp->sc->csc_route == pcic_iw_pci) {
		/* Do the PCI side of things: Enable the Card Change int */
		reg = CB_SM_CD;
		bus_space_write_4(sp->bst, sp->bsh, CB_SOCKET_MASK, reg);
		/*
		 * TI Chips need us to set the following.  We tell the
		 * controller to route things via PCI interrupts.  Also
		 * we clear the interrupt number in the STAT_INT register
		 * as well.  The TI-12xx and newer chips require one or the
		 * other of these to happen, depending on what is set in the
		 * diagnostic register.  I do both on the theory that other
		 * chips might need one or the other and that no harm will
		 * come from it.  If there is harm, then I'll make it a bit
		 * in the tables.
		 */
		pcic_setb(sp, PCIC_INT_GEN, PCIC_INTR_ENA);
		pcic_clrb(sp, PCIC_STAT_INT, PCIC_CSCSELECT);
	} else {
		/* Management IRQ changes */
		/*
		 * The PCIC_INTR_ENA bit means either "tie the function
		 * and csc interrupts together" or "Route csc interrupts
		 * via PCI" or "Reserved".  In any case, we want to clear
		 * it since we're using ISA interrupts.
		 */
		pcic_clrb(sp, PCIC_INT_GEN, PCIC_INTR_ENA);
		irq = host_irq_to_pcic(irq);
		sp->putb(sp, PCIC_STAT_INT, (irq << PCIC_SI_IRQ_SHIFT) | 
		    PCIC_CDEN);
	}
}

int
pcic_attach(device_t dev)
{
	int		i;
	device_t	kid;
	struct pcic_softc *sc;
	struct slot	*slt;
	struct pcic_slot *sp;
	
	sc = (struct pcic_softc *) device_get_softc(dev);
	callout_handle_init(&sc->timeout_ch);
	sp = &sc->slots[0];
	for (i = 0; i < PCIC_CARD_SLOTS; i++, sp++) {
		if (!sp->slt)
			continue;
		sp->slt = 0;
		kid = device_add_child(dev, NULL, -1);
		if (kid == NULL) {
			device_printf(dev, "Can't add pccard bus slot %d", i);
			return (ENXIO);
		}
		device_probe_and_attach(kid);
		slt = pccard_init_slot(kid, &pcic_cinfo);
		if (slt == 0) {
			device_printf(dev, "Can't get pccard info slot %d", i);
			return (ENXIO);
		}
		sc->slotmask |= (1 << i);
		slt->cdata = sp;
		sp->slt = slt;
		sp->sc = sc;
	}

	sp = &sc->slots[0];
	for (i = 0; i < PCIC_CARD_SLOTS; i++, sp++) {
		if (sp->slt == NULL)
			continue;

		pcic_do_mgt_irq(sp, sc->irq);
		sp->slt->irq = sc->irq;

		/* Check for changes */
		pcic_setb(sp, PCIC_POWER, PCIC_PCPWRE | PCIC_DISRST);
		sp->slt->laststate = sp->slt->state = empty;
		if (pcic_boot_deactivated) {
			if ((sp->getb(sp, PCIC_STATUS) & PCIC_CD) == PCIC_CD) {
				sp->slt->state = inactive;
				pccard_event(sp->slt, card_deactivated);
			}
		} else {
			pcic_do_stat_delta(sp);
		}
	}

	return (bus_generic_attach(dev));
}


static int
pcic_sresource(struct slot *slt, caddr_t data)
{
	struct pccard_resource *pr;
	struct resource *r;
	int flags;
	int rid = 0;
	device_t bridgedev = slt->dev;
	struct pcic_slot *sp = slt->cdata;

	pr = (struct pccard_resource *)data;
	pr->resource_addr = ~0ul;

	/*
	 * If we're using PCI interrupt routing, then force the IRQ to
	 * use and to heck with what the user requested.  If they want
	 * to be able to request IRQs, they must use ISA interrupt
	 * routing.  If we don't give them an irq, and it is the
	 * pccardd 0,0 case, then just return (giving the "bad resource"
	 * return in pr->resource_addr).
	 */
	if (pr->type == SYS_RES_IRQ) {
		if (sp->sc->func_route >= pcic_iw_pci) {
			pr->resource_addr = sp->sc->irq;
			return (0);
		}
		if (pr->min == 0 && pr->max == 0)
			return (0);
	}

	/*
	 * Make sure we grok this type.
	 */
	switch(pr->type) {
	default:
		return (EINVAL);
	case SYS_RES_MEMORY:
	case SYS_RES_IRQ:
	case SYS_RES_IOPORT:
		break;
	}

	/*
	 * Allocate the resource, and align it to the most natural
	 * size.  If we get it, then tell userland what we actually got
	 * in the range they requested.
	 */
	flags = rman_make_alignment_flags(pr->size);
	r = bus_alloc_resource(bridgedev, pr->type, &rid, pr->min, pr->max,
	   pr->size, flags);
	if (r != NULL) {
		pr->resource_addr = (u_long)rman_get_start(r);
		bus_release_resource(bridgedev, pr->type, rid, r);
	}
	return (0);
}

/*
 *	ioctl calls - Controller specific ioctls
 */
static int
pcic_ioctl(struct slot *slt, int cmd, caddr_t data)
{
	struct pcic_slot *sp = slt->cdata;
	struct pcic_reg *preg = (struct pcic_reg *) data;

	switch(cmd) {
	default:
		return (ENOTTY);
	case PIOCGREG:			/* Get pcic register */
		preg->value = sp->getb(sp, preg->reg);
		break;			/* Set pcic register */
	case PIOCSREG:
		sp->putb(sp, preg->reg, preg->value);
		break;
	case PIOCSRESOURCE:		/* Can I use this resource? */
		pcic_sresource(slt, data);
		break;
	}
	return (0);
}

/*
 *	pcic_cardbus_power
 *
 *	Power the card up, as specified, using the cardbus power
 *	registers to control power.  Microsoft recommends that cardbus
 *	vendors support powering the card via cardbus registers because
 *	there is no standard for 3.3V cards.  Since at least a few of the
 *	cardbus bridges have minor issues with power via the ExCA registers,
 *	go ahead and do it all via cardbus registers.
 *
 *	An expamination of the code will show the relative ease that we do
 *	Vpp in comparison to the ExCA case (which may be partially broken).
 *
 *	Too bad it appears to not work.  When used we seem to be unable to
 *	read the card's CIS.
 */
static int
pcic_cardbus_power(struct pcic_slot *sp, struct slot *slt)
{
	uint32_t power;
	uint32_t state;

	/*
	 * Preserve the clock stop bit of the socket power register.
	 */
	power = bus_space_read_4(sp->bst, sp->bsh, CB_SOCKET_POWER);
	state =  bus_space_read_4(sp->bst, sp->bsh, CB_SOCKET_STATE);
	printf("old value 0x%x\n", power);
	power &= ~CB_SP_CLKSTOP;

	/*
	 * vcc == -1 means automatically detect the voltage of the card.
	 * Do so and apply the right amount of power.
	 */
	if (slt->pwr.vcc == -1) {
		if (state & CB_SS_5VCARD)
			slt->pwr.vcc = 50;
		else if (state & CB_SS_3VCARD)
			slt->pwr.vcc = 33;
		else if (state & CB_SS_XVCARD)
			slt->pwr.vcc = 22;
		else if (state & CB_SS_YVCARD)
			slt->pwr.vcc = 11;
	}
	switch(slt->pwr.vcc) {
	default:
		return (EINVAL);
	case 0:
		power |= CB_SP_VCC_0V;
		break;
	case 11:
		power |= CB_SP_VCC_YV;
		break;
	case 22:
		power |= CB_SP_VCC_XV;
		break;
	case 33:
		power |= CB_SP_VCC_3V;
		break;
	case 50:
		power |= CB_SP_VCC_5V;
		break;
	}

	/*
	 * vpp == -1 means use vcc voltage.
	 */
	if (slt->pwr.vpp == -1)
		slt->pwr.vpp = slt->pwr.vcc;
	switch(slt->pwr.vpp) {
	default:
		return (EINVAL);
	case 0:
		power |= CB_SP_VPP_0V;
		break;
	case 11:
		power |= CB_SP_VPP_YV;
		break;
	case 22:
		power |= CB_SP_VPP_XV;
		break;
	case 33:
		power |= CB_SP_VPP_3V;
		break;
	case 50:
		power |= CB_SP_VPP_5V;
		break;
	case 120:
		power |= CB_SP_VPP_12V;
		break;
	}
	printf("Setting power reg to 0x%x", power);
	bus_space_write_4(sp->bst, sp->bsh, CB_SOCKET_POWER, power);

	return (EIO);
}

/*
 *	pcic_power - Enable the power of the slot according to
 *	the parameters in the power structure(s).
 */
static int
pcic_power(struct slot *slt)
{
	unsigned char c;
	unsigned char reg = PCIC_DISRST | PCIC_PCPWRE;
	struct pcic_slot *sp = slt->cdata;
	struct pcic_slot *sp2;
	struct pcic_softc *sc = sp->sc;
	int dodefault = 0;

	/*
	 * Cardbus power registers are completely different.
	 */
	if (sc->flags & PCIC_CARDBUS_POWER)
		return (pcic_cardbus_power(sp, slt));

	if (bootverbose)
		device_printf(sc->dev, "Power: Vcc=%d Vpp=%d\n", slt->pwr.vcc,
		    slt->pwr.vpp);
	/*
	 * If we're automatically detecting what voltage to use, then we need
	 * to ask the bridge what type (voltage-wise) the card is.
	 */
	if (slt->pwr.vcc == -1) {
		if (sc->flags & PCIC_DF_POWER) {
			/* 
			 * Look at the VS[12]# bits on the card.  If VS1 is
			 * clear then the card needs 3.3V instead of 5.0V.
			 */
			c = sp->getb(sp, PCIC_CDGC);
			if ((c & PCIC_VS1STAT) == 0)
				slt->pwr.vcc = 33;
			else
				slt->pwr.vcc = 50;
		}
		if (sc->flags & PCIC_PD_POWER) {
			/*
			 * The 6710 does it one way, and the '22 and '29 do it
			 * another.  And it appears that the '32 and '33 yet
			 * another way (which I don't know).  The '22 can also
			 * do it the same way as a '10 does it, despite what
			 * the datasheets say.  Some laptops with '22 don't
			 * seem to have the signals wired right for the '29
			 * method to work, so we always use the '10 method for
			 * the '22.  The laptops that don't work hang solid
			 * when the pccard memory is accessed.
			 */
			switch (sp->controller) {
			case PCIC_PD6710:
			case PCIC_PD6722:
				c = sp->getb(sp, PCIC_MISC1);
				if ((c & PCIC_MISC1_5V_DETECT) == 0)
					slt->pwr.vcc = 33;
				else
					slt->pwr.vcc = 50;
				break;
			case PCIC_PD6729:
				/*
				 * VS[12] signals are in slot1's
				 * extended reg 0xa for both slots.
				 */
				sp2 = &sc->slots[1];
				sp2->putb(sp2, PCIC_EXT_IND, PCIC_EXT_DATA);
				c = sp2->getb(sp2, PCIC_EXTENDED);
				if (sp == sp2)		/* slot 1 */
					c >>= 2;
				if ((c & PCIC_VS1A) == 0)
					slt->pwr.vcc = 33;
				else
					slt->pwr.vcc = 50;
				break;
			default:
				/* I have no idea how do do this for others */
				break;
			}

			/*
			 * Regardless of the above, setting the Auto Power
			 * Switch Enable appears to help.
			 */
			reg |= PCIC_APSENA;
		}
		/* Other bridges here */
		if (bootverbose && slt->pwr.vcc != -1)
			device_printf(sc->dev, "Autodetected %d.%dV card\n",
			    slt->pwr.vcc / 10, slt->pwr.vcc %10);
	}
	if (slt->pwr.vcc == -1) {
		if (bootverbose)
			device_printf(sc->dev,
			    "Couldn't autodetect voltage, assuming 5.0V\n");
		dodefault = 1;
		slt->pwr.vcc = 50;
	}

	/*
	 * XXX Note: The Vpp controls varies quit a bit between bridge chips
	 * and the following might not be right in all cases.  The Linux
	 * code and wildboar code bases are more complex.  However, most
	 * applications want vpp == vcc and the following code does appear
	 * to do that for all bridge sets.
	 */
	if (slt->pwr.vpp == -1)
		slt->pwr.vpp = slt->pwr.vcc;
	switch(slt->pwr.vpp) {
	default:
		return (EINVAL);
	case 0:
		break;
	case 50:
	case 33:
		reg |= PCIC_VPP_5V;
		break;
	case 120:
		reg |= PCIC_VPP_12V;
		break;
	}

	if (slt->pwr.vcc)
		reg |= PCIC_VCC_ON;		/* Turn on Vcc */
	switch(slt->pwr.vcc) {
	default:
		return (EINVAL);
	case 0:
		break;
	case 33:
		/*
		 * The wildboar code has comments that state that
		 * the IBM KING controller doesn't support 3.3V
		 * on the "IBM Smart PC card drive".  The code
		 * intemates that's the only place they have seen
		 * it used and that there's a boatload of issues
		 * with it.  I'm not even sure this is right because
		 * the only docs I've been able to find say this is for
		 * 5V power.  Of course, this "doc" is just code comments
		 * so who knows for sure.
		 */
		if (sc->flags & PCIC_KING_POWER) {
			reg |= PCIC_VCC_5V_KING;
			break;
		}
		if (sc->flags & PCIC_VG_POWER) {
			pcic_setb(sp, PCIC_CVSR, PCIC_CVSR_VS);
			break;
		}
		if (sc->flags & PCIC_PD_POWER) {
			pcic_setb(sp, PCIC_MISC1, PCIC_MISC1_VCC_33);
			break;
		}
		if (sc->flags & PCIC_RICOH_POWER) {
			pcic_setb(sp, PCIC_RICOH_MCR2, PCIC_MCR2_VCC_33);
			break;
		}
		if (sc->flags & PCIC_DF_POWER)
			reg |= PCIC_VCC_3V;
		break;
	case 50:
		if (sc->flags & PCIC_KING_POWER)
			reg |= PCIC_VCC_5V_KING;
		/*
		 * For all of the variant power schemes for 3.3V go
		 * ahead and turn off the 3.3V enable bit.  For all
		 * bridges, the setting the Vcc on bit does the rest.
		 * Note that we don't have to turn off the 3.3V bit
		 * for the '365 step D since with the reg assigments
		 * to this point it doesn't get turned on.
		 */
		if (sc->flags & PCIC_VG_POWER)
			pcic_clrb(sp, PCIC_CVSR, PCIC_CVSR_VS);
		if (sc->flags & PCIC_PD_POWER)
			pcic_clrb(sp, PCIC_MISC1, PCIC_MISC1_VCC_33);
		if (sc->flags & PCIC_RICOH_POWER)
			pcic_clrb(sp, PCIC_RICOH_MCR2, PCIC_MCR2_VCC_33);
		break;
	}
	sp->putb(sp, PCIC_POWER, reg);
	if (bootverbose)
		device_printf(sc->dev, "Power applied\n");
	DELAY(300*1000);
	if (slt->pwr.vcc) {
		reg |= PCIC_OUTENA;
		sp->putb(sp, PCIC_POWER, reg);
		if (bootverbose)
			device_printf(sc->dev, "Output enabled\n");
		DELAY(100*1000);
		if (bootverbose)
			device_printf(sc->dev, "Settling complete\n");
	}

	/*
	 * Some chipsets will attempt to preclude us from supplying
	 * 5.0V to cards that only handle 3.3V.  We seem to need to
	 * try 3.3V to paper over some power handling issues in other
	 * parts of the system.  Maybe the proper detection of 3.3V cards
	 * now obviates the need for this hack, so put a printf in to
	 * warn the world about it.
	 */
	if (!(sp->getb(sp, PCIC_STATUS) & PCIC_POW) && dodefault) {
		slt->pwr.vcc = 33;
		slt->pwr.vpp = 0;
		device_printf(sc->dev,
		    "Failed at 5.0V.  Trying 3.3V.  Please report message to mobile@freebsd.org\n");
		return (pcic_power(slt));
	}
	if (bootverbose)
		printf("Power complete.\n");
	return (0);
}

/*
 * tell the PCIC which irq we want to use.  only the following are legal:
 * 3, 4, 5, 7, 9, 10, 11, 12, 14, 15.  We require the callers of this
 * routine to do the check for legality.
 */
static void
pcic_mapirq(struct slot *slt, int irq)
{
	struct pcic_slot *sp = slt->cdata;

	sp->sc->chip->map_irq(sp, irq);
}

/*
 *	pcic_reset - Reset the card and enable initial power.  This may
 *	need to be interrupt driven in the future.  We should likely turn
 *	the reset on, DELAY for a period of time < 250ms, turn it off and
 *	tsleep for a while and check it when we're woken up.  I think that
 *	we're running afoul of the card status interrupt glitching, causing
 *	an interrupt storm because the card doesn't seem to be able to
 *	clear this pin while in reset.
 */
static void
pcic_reset(void *chan)
{
	struct slot *slt = chan;
	struct pcic_slot *sp = slt->cdata;

	if (bootverbose)
		device_printf(sp->sc->dev, "reset %d ", slt->insert_seq);
	switch (slt->insert_seq) {
	case 0: /* Something funny happended on the way to the pub... */
		if (bootverbose)
			printf("\n");
		return;
	case 1: /* Assert reset */
		pcic_clrb(sp, PCIC_INT_GEN, PCIC_CARDRESET);
		if (bootverbose)
			printf("int is %x stat is %x\n",
			    sp->getb(sp, PCIC_INT_GEN),
			    sp->getb(sp, PCIC_STATUS));
		slt->insert_seq = 2;
		timeout(pcic_reset, (void *)slt, hz/4);
		return;
	case 2: /* Deassert it again */
		pcic_setb(sp, PCIC_INT_GEN, PCIC_CARDRESET | PCIC_IOCARD);
		if (bootverbose)
			printf("int is %x stat is %x\n",
			    sp->getb(sp, PCIC_INT_GEN),
			    sp->getb(sp, PCIC_STATUS));
		slt->insert_seq = 3;
		timeout(pcic_reset, (void *)slt, hz/4);
		return;
	case 3: /* Wait if card needs more time */
		if (bootverbose)
			printf("int is %x stat is %x\n",
			    sp->getb(sp, PCIC_INT_GEN),
			    sp->getb(sp, PCIC_STATUS));
		if (!sp->getb(sp, PCIC_STATUS) & PCIC_READY) {
			timeout(pcic_reset, (void *)slt, hz/10);
			return;
		}
	}
	slt->insert_seq = 0;
	if (sp->controller == PCIC_PD6722 || sp->controller == PCIC_PD6710) {
		sp->putb(sp, PCIC_TIME_SETUP0, 0x1);
		sp->putb(sp, PCIC_TIME_CMD0, 0x6);
		sp->putb(sp, PCIC_TIME_RECOV0, 0x0);
		sp->putb(sp, PCIC_TIME_SETUP1, 1);
		sp->putb(sp, PCIC_TIME_CMD1, 0xf);
		sp->putb(sp, PCIC_TIME_RECOV1, 0);
	}
	selwakeup(&slt->selp);
}

/*
 *	pcic_disable - Disable the slot.  I wonder if these operations can
 *	cause an interrupt we need to acknowledge? XXX
 */
static void
pcic_disable(struct slot *slt)
{
	struct pcic_slot *sp = slt->cdata;

	pcic_clrb(sp, PCIC_INT_GEN, PCIC_CARDTYPE | PCIC_CARDRESET);
	pcic_mapirq(slt, 0);
	sp->putb(sp, PCIC_POWER, 0);
}

/*
 *	pcic_resume - Suspend/resume support for PCIC
 */
static void
pcic_resume(struct slot *slt)
{
	struct pcic_slot *sp = slt->cdata;

	pcic_do_mgt_irq(sp, slt->irq);
	if (sp->controller == PCIC_PD6722) {
		pcic_setb(sp, PCIC_MISC1, PCIC_MISC1_SPEAKER);
		pcic_setb(sp, PCIC_MISC2, PCIC_LPDM_EN);
	}
	if (sp->slt->state != inactive)
		pcic_do_stat_delta(sp);
}

int
pcic_activate_resource(device_t dev, device_t child, int type, int rid,
    struct resource *r)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	int err;

	if (dev != device_get_parent(device_get_parent(child)) || devi == NULL)
		return (bus_generic_activate_resource(dev, child, type,
		    rid, r));

	switch (type) {
	case SYS_RES_IOPORT: {
		struct io_desc *ip;
		ip = &devi->slt->io[rid];
		if (ip->flags == 0) {
			if (rid == 0)
				ip->flags = IODF_WS | IODF_16BIT | IODF_CS16;
			else
				ip->flags = devi->slt->io[0].flags;
		}
		ip->flags |= IODF_ACTIVE;
		ip->start = rman_get_start(r);
		ip->size = rman_get_end(r) - rman_get_start(r) + 1;
		err = pcic_io(devi->slt, rid);
		if (err)
			return (err);
		break;
	}
	case SYS_RES_IRQ:
		/*
		 * We actually defer the activation of the IRQ resource
		 * until the interrupt is registered to avoid stray
		 * interrupt messages.
		 */
		break;
	case SYS_RES_MEMORY: {
		struct mem_desc *mp;
		if (rid >= NUM_MEM_WINDOWS)
			return (EINVAL);
		mp = &devi->slt->mem[rid];
		mp->flags |= MDF_ACTIVE;
		mp->start = (caddr_t) rman_get_start(r);
		mp->size = rman_get_end(r) - rman_get_start(r) + 1;
		err = pcic_memory(devi->slt, rid);
		if (err)
			return (err);
		break;
	}
	default:
		break;
	}
	err = bus_generic_activate_resource(dev, child, type, rid, r);
	return (err);
}

int
pcic_deactivate_resource(device_t dev, device_t child, int type, int rid,
    struct resource *r)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	int err;

	if (dev != device_get_parent(device_get_parent(child)) || devi == NULL)
		return (bus_generic_deactivate_resource(dev, child, type,
		    rid, r));

	switch (type) {
	case SYS_RES_IOPORT: {
		struct io_desc *ip = &devi->slt->io[rid];
		ip->flags &= ~IODF_ACTIVE;
		err = pcic_io(devi->slt, rid);
		if (err)
			return (err);
		break;
	}
	case SYS_RES_IRQ:
		break;
	case SYS_RES_MEMORY: {
		struct mem_desc *mp = &devi->slt->mem[rid];
		mp->flags &= ~(MDF_ACTIVE | MDF_ATTR);
		err = pcic_memory(devi->slt, rid);
		if (err)
			return (err);
		break;
	}
	default:
		break;
	}
	err = bus_generic_deactivate_resource(dev, child, type, rid, r);
	return (err);
}

int
pcic_setup_intr(device_t dev, device_t child, struct resource *irq,
    int flags, driver_intr_t *intr, void *arg, void **cookiep)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	int err;

	if (((1 << rman_get_start(irq)) & PCIC_INT_MASK_ALLOWED) == 0) {
		device_printf(dev, "Hardware does not support irq %ld.\n",
		    rman_get_start(irq));
		return (EINVAL);
	}

	err = bus_generic_setup_intr(dev, child, irq, flags, intr, arg,
	    cookiep);
	if (err == 0)
		pcic_mapirq(devi->slt, rman_get_start(irq));
	else
		device_printf(dev, "Error %d irq %ld\n", err,
		    rman_get_start(irq));
	return (err);
}

int
pcic_teardown_intr(device_t dev, device_t child, struct resource *irq,
    void *cookie)
{
	struct pccard_devinfo *devi = device_get_ivars(child);

	pcic_mapirq(devi->slt, 0);
	return (bus_generic_teardown_intr(dev, child, irq, cookie));
}

int
pcic_set_res_flags(device_t bus, device_t child, int restype, int rid,
    u_long value)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	int err = 0;

	switch (restype) {
	case SYS_RES_MEMORY: {
		struct mem_desc *mp = &devi->slt->mem[rid];
		switch (value) {
		case PCCARD_A_MEM_COM:
			mp->flags &= ~MDF_ATTR;
			break;
		case PCCARD_A_MEM_ATTR:
			mp->flags |= MDF_ATTR;
			break;
		case PCCARD_A_MEM_8BIT:
			mp->flags &= ~MDF_16BITS;
			break;
		case PCCARD_A_MEM_16BIT:
			mp->flags |= MDF_16BITS;
			break;
		}
		err = pcic_memory(devi->slt, rid);
		break;
	}
	default:
		err = EOPNOTSUPP;
	}
	return (err);
}

int
pcic_get_res_flags(device_t bus, device_t child, int restype, int rid,
    u_long *value)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	int err = 0;

	if (value == 0)
		return (ENOMEM);

	switch (restype) {
	case SYS_RES_IOPORT: {
		struct io_desc *ip = &devi->slt->io[rid];
		*value = ip->flags;
		break;
	}
	case SYS_RES_MEMORY: {
		struct mem_desc *mp = &devi->slt->mem[rid];
		*value = mp->flags;
		break;
	}
	default:
		err = EOPNOTSUPP;
	}
	return (err);
}

int
pcic_set_memory_offset(device_t bus, device_t child, int rid, u_int32_t offset
#if __FreeBSD_version >= 500000
    ,u_int32_t *deltap
#endif
    )
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	struct mem_desc *mp = &devi->slt->mem[rid];

	mp->card = offset;
#if __FreeBSD_version >= 500000
	if (deltap)
		*deltap = 0;			/* XXX BAD XXX */
#endif
	return (pcic_memory(devi->slt, rid));
}

int
pcic_get_memory_offset(device_t bus, device_t child, int rid, u_int32_t *offset)
{
	struct pccard_devinfo *devi = device_get_ivars(child);
	struct mem_desc *mp = &devi->slt->mem[rid];

	if (offset == 0)
		return (ENOMEM);

	*offset = mp->card;

	return (0);
}

struct resource *
pcic_alloc_resource(device_t dev, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct pcic_softc *sc = device_get_softc(dev);

	/*
	 * If we're routing via pci, we can share.
	 */
	if (sc->func_route == pcic_iw_pci && type == SYS_RES_IRQ) {
		if (bootverbose)
			device_printf(child, "Forcing IRQ to %d\n", sc->irq);
		start = end = sc->irq;
		flags |= RF_SHAREABLE;
	}

	return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
	    count, flags));
}

void
pcic_do_stat_delta(struct pcic_slot *sp)
{
	if ((sp->getb(sp, PCIC_STATUS) & PCIC_CD) != PCIC_CD)
		pccard_event(sp->slt, card_removed);
	else
		pccard_event(sp->slt, card_inserted);
}
/*
 * Wrapper function for pcicintr so that signatures match.
 */
void
pcic_isa_intr(void *arg)
{
	pcic_isa_intr1(arg);
}

/*
 *	PCIC timer.  If the controller doesn't have a free IRQ to use
 *	or if interrupt steering doesn't work, poll the controller for
 *	insertion/removal events.
 */
void
pcic_timeout(void *chan)
{
	struct pcic_softc *sc = (struct pcic_softc *) chan;

	if (pcic_isa_intr1(chan) != 0) {
		device_printf(sc->dev, 
		    "Static bug detected, ignoring hardware.");
		sc->slot_poll = 0;
		return;
	}
	sc->timeout_ch = timeout(sc->slot_poll, chan, hz/2);
}

/*
 *	PCIC Interrupt handler.
 *	Check each slot in turn, and read the card status change
 *	register. If this is non-zero, then a change has occurred
 *	on this card, so send an event to the main code.
 */
int
pcic_isa_intr1(void *arg)
{
	int	slot, s;
	u_int8_t chg;
	struct pcic_softc *sc = (struct pcic_softc *) arg;
	struct pcic_slot *sp = &sc->slots[0];

	s = splhigh();
	for (slot = 0; slot < PCIC_CARD_SLOTS; slot++, sp++) {
		if (sp->slt == NULL)
			continue;
		if ((chg = sp->getb(sp, PCIC_STAT_CHG)) != 0) {
			/*
			 * if chg is 0xff, then we know that we've hit
			 * the famous "static bug" for some desktop
			 * pcmcia cards.  This is caused by static
			 * discharge frying the poor card's mind and
			 * it starts return 0xff forever.  We return
			 * an error and stop polling the card.  When
			 * we're interrupt based, we never see this.
			 * The card just goes away silently.
			 */
			if (chg == 0xff) {
				splx(s);
				return (EIO);
			}
			if (chg & PCIC_CDTCH)
				pcic_do_stat_delta(sp);
		}
	}
	splx(s);
	return (0);
}

int
pcic_isa_mapirq(struct pcic_slot *sp, int irq)
{
	irq = host_irq_to_pcic(irq);
	sp->sc->chip->func_intr_way(sp, pcic_iw_isa);
	if (irq == 0)
		pcic_clrb(sp, PCIC_INT_GEN, 0xF);
	else
		sp->putb(sp, PCIC_INT_GEN,
		    (sp->getb(sp, PCIC_INT_GEN) & 0xF0) | irq);
	return (0);
}