freebsd-nq/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.
 *
 * $FreeBSD$
 */

#define OBSOLETE_IN_6

#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.  This works\n\
around what turns out to be an old bug in the code that has since been\n\
corrected.  It is now deprecated and will be removed completely before\n\
FreeBSD 4.8.");

/*
 * CL-PD6722's VSENSE method
 *     0: NO VSENSE (assume a 5.0V card)
 *     1: 6710's method (default)
 *     2: 6729's method
 */
int pcic_pd6722_vsense = 1;
TUNABLE_INT("hw.pcic.pd6722_vsense", &pcic_pd6722_vsense);
SYSCTL_INT(_hw_pcic, OID_AUTO, pd6722_vsense, CTLFLAG_RD,
    &pcic_pd6722_vsense, 1,
    "Select CL-PD6722's VSENSE method.  VSENSE is used to determine the\n\
volatage of inserted cards.  The CL-PD6722 has two methods to determine the\n\
voltage of the card.  0 means assume a 5.0V card and do not check.  1 means\n\
use the same method that the CL-PD6710 uses (default).  2 means use the\n\
same method as the CL-PD6729.  2 is documented in the datasheet as being\n\
the correct way, but 1 seems to give better results on more laptops.");

/*
 * 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;
		if ((sys_addr >> 12) != 0 && 
		    (sp->sc->flags & PCIC_YENTA_HIGH_MEMORY) == 0) {
			printf("This pcic does not support mapping > 24M\n");
			return (ENXIO);
		}
		/*
		 * 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.
		 * Memory mapped cardbus bridges extend this slightly to allow
		 * one to set the upper 8 bits of the 32bit address as well.
		 * If the chip supports it, then go ahead and write those
		 * upper 8 bits.
		 */
		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);
		if (sp->sc->flags & PCIC_YENTA_HIGH_MEMORY)
		    sp->putb(sp, PCIC_MEMORY_HIGH0 + win, sys_addr >> 12);
		/*
		 *	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 */
		sp->slt->laststate = sp->slt->state = empty;
		if (pcic_boot_deactivated) {
			sp->putb(sp, PCIC_POWER, 0);
			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).
 */
static int
pcic_cardbus_power(struct pcic_slot *sp, struct slot *slt)
{
	uint32_t power;
	uint32_t state;

  	/*
 	 * If we're doing an auto-detect, and we're in a badvcc state, then
 	 * we need to force the socket to rescan the card.  We don't do this
 	 * all the time because the socket can take up to 200ms to do the deed,
 	 * and that's too long to busy wait.  Since this is a relatively rare
 	 * event (some BIOSes, and earlier versions of OLDCARD caused it), we
 	 * test for it special.
 	 */
 	state =  bus_space_read_4(sp->bst, sp->bsh, CB_SOCKET_STATE);
 	if (slt->pwr.vcc == -1 && (state & CB_SS_BADVCC)) {
 		/*
 	 	 * Force the bridge to scan the card for the proper voltages
 		 * that it supports.
 		 */
 		bus_space_write_4(sp->bst, sp->bsh, CB_SOCKET_FORCE,
 		    CB_SF_INTCVS);
 		state =  bus_space_read_4(sp->bst, sp->bsh, CB_SOCKET_STATE);
 		/* This while loop can take 100-150ms */
 		while ((state & CB_SS_CARD_MASK) == 0) {
 			DELAY(10 * 1000);
 			state =  bus_space_read_4(sp->bst, sp->bsh,
 			    CB_SOCKET_STATE);
 		}
 	}
 
 
 	/*
 	 * Preserve the clock stop bit of the socket power register.  Not
 	 * sure that we want to do that, but maybe we should set it based
 	 * on the power state.
  	 */
  	power = bus_space_read_4(sp->bst, sp->bsh, CB_SOCKET_POWER);
 	power = 0;

	/*
	 * 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;
 		if (bootverbose && slt->pwr.vcc != -1)
 			device_printf(sp->sc->dev,
			    "Autodetected %d.%dV card\n",
 			    slt->pwr.vcc / 10, slt->pwr.vcc % 10);
	}

	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;
	}
	bus_space_write_4(sp->bst, sp->bsh, CB_SOCKET_POWER, power);

 	/*
 	 * OK.  We need to bring the card out of reset.  Let the power
 	 * stabilize for 300ms (why 300?) and then enable the outputs
 	 * and then wait 100ms (why 100?) for it to stabilize.  These numbers
 	 * were stolen from the dim, dark past of OLDCARD and I have no clue
 	 * how they were derived.  I also use the bit setting routines here
 	 * as a measure of conservatism.
 	 */
 	if (power) {
 		pcic_setb(sp, PCIC_POWER, PCIC_DISRST);
 		DELAY(300*1000);
 		pcic_setb(sp, PCIC_POWER, PCIC_DISRST | PCIC_OUTENA);
 		DELAY(100*1000);
 	} else {
 		pcic_clrb(sp, PCIC_POWER, PCIC_DISRST | PCIC_OUTENA);
 	}
 
	return (0);
}

/*
 *	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, c2;
	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;
	char controller;
	
	/*
	 * 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.  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.  The
			 * laptops that don't work hang solid when the pccard
			 * memory is accessed.
			 *
			 * To allow for both types of laptops,
			 * hw.pcic.pd6722_vsense will select which one to use.
			 * 0 - none, 1 - the '10 way and 2 - the '29 way.
			 */
			controller = sp->controller;
			if (controller == PCIC_PD6722) {
				switch (pcic_pd6722_vsense) {
				case 1:
					controller = PCIC_PD6710;
					break;
				case 2:
					controller = PCIC_PD6729;
					break;
				}
			}

			switch (controller) {
			case PCIC_PD6710:
				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_PD6722:	/* see above for why we do */
 				break;		/* none here */
			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 to do this for others */
				break;
			}

			/*
			 * Regardless of the above, setting the Auto Power
			 * Switch Enable appears to help.
			 */
			reg |= PCIC_APSENA;
		}
		if (sc->flags & PCIC_RICOH_POWER) {
			/*
			 * The ISA bridge have the 5V/3.3V in register
			 * 1, bit 7.  However, 3.3V cards can only be
			 * detected if GPI_EN is disabled.
			 */
			c = sp->getb(sp, PCIC_STATUS);
			c2 = sp->getb(sp, PCIC_CDGC);
			if ((c & PCIC_RICOH_5VCARD) && (c2 & PCIC_GPI_EN) == 0)
				slt->pwr.vcc = 33;
			else
				slt->pwr.vcc = 50;
		}
		/* Other power schemes 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) == 0) {
			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);
	slt->pwr.vcc = slt->pwr.vpp = 0;
	pcic_power(slt);
}

/*
 *	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);
	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);
}