NetBSD/sys/arch/hpcmips/dev/it8368.c

/*	$NetBSD: it8368.c,v 1.18 2003/07/15 02:29:29 lukem 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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: it8368.c,v 1.18 2003/07/15 02:29:29 lukem Exp $");

#undef WINCE_DEFAULT_SETTING /* for debug */
#undef IT8368DEBUG 

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

#include <machine/bus.h>

#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciachip.h>

#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/txcsbusvar.h>
#include <hpcmips/tx/tx39biureg.h> /* legacy mode requires BIU access */
#include <hpcmips/dev/it8368var.h>
#include <hpcmips/dev/it8368reg.h>

#ifdef IT8368DEBUG
int	it8368debug = 1;
#define	DPRINTF(arg) if (it8368debug) printf arg;
#define	DPRINTFN(n, arg) if (it8368debug > (n)) printf arg;
#else
#define	DPRINTF(arg)
#define DPRINTFN(n, arg)
#endif

int it8368e_match(struct device *, struct cfdata *, void *);
void it8368e_attach(struct device *, struct device *, void *);
int it8368_print(void *, const char *);
int it8368_submatch(struct device *, struct cfdata *, void *);

#define IT8368_LASTSTATE_PRESENT	0x0002
#define IT8368_LASTSTATE_HALF		0x0001
#define IT8368_LASTSTATE_EMPTY		0x0000

struct it8368e_softc {
	struct device	sc_dev;
	struct device	*sc_pcmcia;
	tx_chipset_tag_t sc_tc;

	/* Register space */
	bus_space_tag_t		sc_csregt;
	bus_space_handle_t	sc_csregh;
	/* I/O, attribute space */
	bus_space_tag_t		sc_csiot;
	bus_addr_t		sc_csiobase;
	bus_size_t		sc_csiosize;
	/*
	 *  XXX theses means attribute memory. not memory space. 
	 *	memory space is 0x64000000. 
	 */
	bus_space_tag_t		sc_csmemt;
	bus_addr_t		sc_csmembase;
	bus_size_t		sc_csmemsize;

	/* Separate I/O and attribute space mode */
	int sc_fixattr;

	/* Card interrupt handler */
	int	(*sc_card_fun)(void *);
	void	*sc_card_arg;
	void	*sc_card_ih;
	int	sc_card_irq;

	/* Card status change */
	int	sc_irq;
	void	*sc_ih;
	int	sc_laststate;
};

void it8368_init_socket(struct it8368e_softc*);
void it8368_attach_socket(struct it8368e_softc *);
int it8368_intr(void *);
int it8368_chip_mem_alloc(pcmcia_chipset_handle_t, bus_size_t, 
    struct pcmcia_mem_handle *);
void it8368_chip_mem_free(pcmcia_chipset_handle_t, struct pcmcia_mem_handle *);
int it8368_chip_mem_map(pcmcia_chipset_handle_t, int, bus_size_t, bus_size_t,
    struct pcmcia_mem_handle *, bus_addr_t *, int *);
void it8368_chip_mem_unmap(pcmcia_chipset_handle_t, int);
int it8368_chip_io_alloc(pcmcia_chipset_handle_t, bus_addr_t, bus_size_t,
    bus_size_t, struct pcmcia_io_handle *);
void it8368_chip_io_free(pcmcia_chipset_handle_t, struct pcmcia_io_handle *);
int it8368_chip_io_map(pcmcia_chipset_handle_t, int, bus_addr_t, bus_size_t,
    struct pcmcia_io_handle *, int *);
void it8368_chip_io_unmap(pcmcia_chipset_handle_t, int);
void it8368_chip_socket_enable(pcmcia_chipset_handle_t);
void it8368_chip_socket_disable(pcmcia_chipset_handle_t);
void *it8368_chip_intr_establish(pcmcia_chipset_handle_t,
    struct pcmcia_function *, int, int (*) (void *), void *);
void it8368_chip_intr_disestablish(pcmcia_chipset_handle_t, void *);

#ifdef IT8368DEBUG
void it8368_dump(struct it8368e_softc *);
#endif

static struct pcmcia_chip_functions it8368_functions = {
	it8368_chip_mem_alloc,
	it8368_chip_mem_free,
	it8368_chip_mem_map,
	it8368_chip_mem_unmap,
	it8368_chip_io_alloc,
	it8368_chip_io_free,
	it8368_chip_io_map,
	it8368_chip_io_unmap,
	it8368_chip_intr_establish,
	it8368_chip_intr_disestablish,
	it8368_chip_socket_enable,
	it8368_chip_socket_disable
};

CFATTACH_DECL(it8368e, sizeof(struct it8368e_softc),
    it8368e_match, it8368e_attach, NULL, NULL);

/*
 *	IT8368 configuration register is big-endian.
 */
static __inline__ u_int16_t it8368_reg_read(bus_space_tag_t,
    bus_space_handle_t, int);
static __inline__ void it8368_reg_write(bus_space_tag_t, bus_space_handle_t,
    int, u_int16_t);

#ifdef IT8368E_DESTRUCTIVE_CHECK
int	it8368e_id_check(void *);

/*
 *	IT8368E don't have identification method. this is destructive check.
 */
int
it8368e_id_check(void *aux)
{
	struct cs_attach_args *ca = aux;	
	tx_chipset_tag_t tc;
	bus_space_tag_t csregt;
	bus_space_handle_t csregh;
	u_int16_t oreg, reg;
	int match = 0;

	tc = ca->ca_tc;
	csregt = ca->ca_csreg.cstag;

	bus_space_map(csregt, ca->ca_csreg.csbase, ca->ca_csreg.cssize,
	    0, &csregh);
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);
	oreg = reg;
	dbg_bit_print(reg);

	reg &= ~IT8368_CTRL_BYTESWAP;
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, reg);
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);		
	if (reg & IT8368_CTRL_BYTESWAP)
		goto nomatch;
	
	reg |= IT8368_CTRL_BYTESWAP;
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, reg);
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);	
	if (!(reg & IT8368_CTRL_BYTESWAP))
		goto nomatch;

	match = 1;
 nomatch:	
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, oreg);
	bus_space_unmap(csregt, csregh, ca->ca_csreg.cssize);

	return (match);
}
#endif /* IT8368E_DESTRUCTIVE_CHECK */

int
it8368e_match(struct device *parent, struct cfdata *cf, void *aux)
{
#ifdef IT8368E_DESTRUCTIVE_CHECK
	return (it8368e_id_check(aux));
#else
	return (1);
#endif
}

void
it8368e_attach(struct device *parent, struct device *self, void *aux)
{
	struct cs_attach_args *ca = aux;
	struct it8368e_softc *sc = (void*)self;
	tx_chipset_tag_t tc;
	bus_space_tag_t csregt;
	bus_space_handle_t csregh;
	u_int16_t reg;

	sc->sc_tc = tc = ca->ca_tc;
	sc->sc_csregt = csregt = ca->ca_csreg.cstag;
	
	bus_space_map(csregt, ca->ca_csreg.csbase, ca->ca_csreg.cssize,
	    0, &sc->sc_csregh);
	csregh = sc->sc_csregh;
	sc->sc_csiot = ca->ca_csio.cstag;
	sc->sc_csiobase = ca->ca_csio.csbase;
	sc->sc_csiosize = ca->ca_csio.cssize;

#ifdef IT8368DEBUG
	printf("\n\t[Windows CE setting]\n");
	it8368_dump(sc); /* print WindowsCE setting */
#endif
	/* LHA[14:13] <= HA[14:13]	*/
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);
	reg &= ~IT8368_CTRL_ADDRSEL;
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, reg);

	/* Set all MFIO direction as LHA[23:13] output pins */
	reg = it8368_reg_read(csregt, csregh, IT8368_MFIODIR_REG);
	reg |= IT8368_MFIODIR_MASK;
	it8368_reg_write(csregt, csregh, IT8368_MFIODIR_REG, reg);

	/* Set all MFIO functions as LHA */
	reg = it8368_reg_read(csregt, csregh, IT8368_MFIOSEL_REG);
	reg &= ~IT8368_MFIOSEL_MASK;
	it8368_reg_write(csregt, csregh, IT8368_MFIOSEL_REG, reg);

	/* Disable MFIO interrupt */
	reg = it8368_reg_read(csregt, csregh, IT8368_MFIOPOSINTEN_REG);
	reg &= ~IT8368_MFIOPOSINTEN_MASK;
	it8368_reg_write(csregt, csregh, IT8368_MFIOPOSINTEN_REG, reg);
	reg = it8368_reg_read(csregt, csregh, IT8368_MFIONEGINTEN_REG);
	reg &= ~IT8368_MFIONEGINTEN_MASK;
	it8368_reg_write(csregt, csregh, IT8368_MFIONEGINTEN_REG, reg);

	/* Port direction */
	reg = IT8368_PIN_CRDVCCON1 | IT8368_PIN_CRDVCCON0 |
	    IT8368_PIN_CRDVPPON1 | IT8368_PIN_CRDVPPON0 |
	    IT8368_PIN_BCRDRST;
	it8368_reg_write(csregt, csregh, IT8368_GPIODIR_REG, reg);
	printf("\n");

	/* 
	 *	Separate I/O and attribute memory region 
	 */
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);

	reg |= IT8368_CTRL_FIXATTRIO;
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, reg);

	if (IT8368_CTRL_FIXATTRIO & 
	    it8368_reg_read(csregt, csregh, IT8368_CTRL_REG)) {
		sc->sc_fixattr = 1;
		printf("%s: fix attr mode\n", sc->sc_dev.dv_xname);
	} else {
		sc->sc_fixattr = 0;
		printf("%s: legacy attr mode\n", sc->sc_dev.dv_xname);
	}

	sc->sc_csmemt = sc->sc_csiot;
	sc->sc_csiosize /= 2;
	sc->sc_csmemsize = sc->sc_csiosize;
	sc->sc_csmembase = sc->sc_csiosize;

#ifdef IT8368DEBUG
	it8368_dump(sc);
#endif
	/* Enable card and interrupt driving. */
	reg = it8368_reg_read(csregt, csregh, IT8368_CTRL_REG);
	reg |= (IT8368_CTRL_GLOBALEN | IT8368_CTRL_CARDEN);
	if (sc->sc_fixattr)
		reg |= IT8368_CTRL_FIXATTRIO;
	it8368_reg_write(csregt, csregh, IT8368_CTRL_REG, reg);

	sc->sc_irq = ca->ca_irq1;
	sc->sc_card_irq = ca->ca_irq3;

	it8368_attach_socket(sc);
}

__inline__ u_int16_t
it8368_reg_read(bus_space_tag_t t, bus_space_handle_t h, int ofs)
{
	u_int16_t val;

	val = bus_space_read_2(t, h, ofs);
	return (0xffff & (((val >> 8) & 0xff)|((val << 8) & 0xff00)));
}

__inline__ void
it8368_reg_write(bus_space_tag_t t, bus_space_handle_t h, int ofs, u_int16_t v)
{
	u_int16_t val;

	val = 0xffff & (((v >> 8) & 0xff)|((v << 8) & 0xff00));
	bus_space_write_2(t, h, ofs, val);
}

int
it8368_intr(void *arg)
{
	struct it8368e_softc *sc = arg;
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	u_int16_t reg;

	reg = it8368_reg_read(csregt, csregh, IT8368_GPIONEGINTSTAT_REG);

	if (reg & IT8368_PIN_BCRDRDY) {
		if (sc->sc_card_fun) {
			/* clear interrupt */
			it8368_reg_write(csregt, csregh, 
			    IT8368_GPIONEGINTSTAT_REG,
			    IT8368_PIN_BCRDRDY);
			
			/* Dispatch card interrupt handler */
			(*sc->sc_card_fun)(sc->sc_card_arg);
		}
	} else if (reg & IT8368_PIN_CRDDET2) {
		it8368_reg_write(csregt, csregh, IT8368_GPIONEGINTSTAT_REG,
		    IT8368_PIN_CRDDET2);
		printf("[CSC]\n");
#ifdef IT8368DEBUG
		it8368_dump(sc);
#endif
		it8368_chip_socket_disable(sc);
	} else {
#ifdef IT8368DEBUG
		u_int16_t reg2;
		reg2 = reg & ~(IT8368_PIN_BCRDRDY|IT8368_PIN_CRDDET2);
		printf("unknown it8368 interrupt: ");
		dbg_bit_print(reg2);
		it8368_reg_write(csregt, csregh, IT8368_GPIONEGINTSTAT_REG,
		    reg);
#endif
	}

	return (0);
}

int
it8368_print(void *arg, const char *pnp)
{
	if (pnp)
		aprint_normal("pcmcia at %s", pnp);

	return (UNCONF);
}

int
it8368_submatch(struct device *parent, struct cfdata *cf, void *aux)
{

	return (config_match(parent, cf, aux));
}

void
it8368_attach_socket(struct it8368e_softc *sc)
{
	struct pcmciabus_attach_args paa;

	paa.paa_busname = "pcmcia";
	paa.pct = (pcmcia_chipset_tag_t)&it8368_functions;
	paa.pch = (pcmcia_chipset_handle_t)sc;
	paa.iobase = 0;
	paa.iosize = sc->sc_csiosize;
	
	if ((sc->sc_pcmcia = config_found_sm((void*)sc, &paa, it8368_print,
	    it8368_submatch))) {

		it8368_init_socket(sc);
	}
}

void
it8368_init_socket(struct it8368e_softc *sc)
{
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	u_int16_t reg;
	
	/* 
	 *  set up the card to interrupt on card detect 
	 */
	reg = IT8368_PIN_CRDDET2; /* CSC */
	/* enable negative edge */
	it8368_reg_write(csregt, csregh, IT8368_GPIONEGINTEN_REG, reg);
	/* disable positive edge */
	it8368_reg_write(csregt, csregh, IT8368_GPIOPOSINTEN_REG, 0);

	sc->sc_ih = tx_intr_establish(sc->sc_tc, sc->sc_irq, 
	    IST_EDGE, IPL_BIO, it8368_intr, sc);
	if (sc->sc_ih == NULL) {
		printf("%s: can't establish interrupt\n",
		    sc->sc_dev.dv_xname);
		return;
	}

	/* 
	 *  if there's a card there, then attach it. 
	 */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAIN_REG);

	if (reg & (IT8368_PIN_CRDDET2|IT8368_PIN_CRDDET1)) {
		sc->sc_laststate = IT8368_LASTSTATE_EMPTY;
	} else {
		pcmcia_card_attach(sc->sc_pcmcia);
		sc->sc_laststate = IT8368_LASTSTATE_PRESENT;
	}
}

void *
it8368_chip_intr_establish(pcmcia_chipset_handle_t pch,
    struct pcmcia_function *pf, int ipl, int (*ih_fun)(void *), void *ih_arg)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	u_int16_t reg;

	if (sc->sc_card_fun)
		panic("it8368_chip_intr_establish: "
		    "duplicate card interrupt handler.");
	
	sc->sc_card_fun = ih_fun;
	sc->sc_card_arg = ih_arg;

	sc->sc_card_ih = tx_intr_establish(sc->sc_tc, sc->sc_card_irq, 
	    IST_EDGE, IPL_BIO, it8368_intr,
	    sc);

	/* enable card interrupt */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIONEGINTEN_REG);
	reg |= IT8368_PIN_BCRDRDY;
	it8368_reg_write(csregt, csregh, IT8368_GPIONEGINTEN_REG, reg);
	
	return (sc->sc_card_ih);
}

void 
it8368_chip_intr_disestablish(pcmcia_chipset_handle_t pch, void *ih)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	u_int16_t reg;

	if (!sc->sc_card_fun)
		panic("it8368_chip_intr_disestablish:"
		    "no handler established.");
	assert(ih == sc->sc_card_ih);
	
	sc->sc_card_fun = 0;
	sc->sc_card_arg = 0;

	/* disable card interrupt */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIONEGINTEN_REG);
	reg &= ~IT8368_PIN_BCRDRDY;
	it8368_reg_write(csregt, csregh, IT8368_GPIONEGINTEN_REG, reg);

	tx_intr_disestablish(sc->sc_tc, ih);
}

int 
it8368_chip_mem_alloc(pcmcia_chipset_handle_t pch, bus_size_t size,
    struct pcmcia_mem_handle *pcmhp)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;

	if (bus_space_alloc(sc->sc_csmemt, sc->sc_csmembase, 
	    sc->sc_csmembase + sc->sc_csmemsize, size, 
	    size, 0, 0, 0, &pcmhp->memh)) {
		DPRINTF(("it8368_chip_mem_alloc: failed\n"));
		return (1);
	}

	if (!sc->sc_fixattr) /* XXX IT8368 brain damaged spec */
		pcmhp->memh -= sc->sc_csmembase;

	pcmhp->memt = sc->sc_csmemt;
	pcmhp->addr = pcmhp->memh;
	pcmhp->size = size;
	pcmhp->realsize = size;

	DPRINTF(("it8368_chip_mem_alloc: %#x+%#x\n", 
	    (unsigned)pcmhp->memh, (unsigned)size));

	return (0);
}

void 
it8368_chip_mem_free(pcmcia_chipset_handle_t pch,
    struct pcmcia_mem_handle *pcmhp)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;

	DPRINTF(("it8368_chip_mem_free: %#x+%#x\n", 
	    (unsigned)pcmhp->memh, (unsigned)pcmhp->size));
	
	if (!sc->sc_fixattr) /* XXX IT8368 brain damaged spec */
		pcmhp->memh += sc->sc_csmembase;

	bus_space_unmap(pcmhp->memt, pcmhp->memh, pcmhp->size);
}

int 
it8368_chip_mem_map(pcmcia_chipset_handle_t pch, int kind,
    bus_addr_t card_addr, bus_size_t size, struct pcmcia_mem_handle *pcmhp,
    bus_size_t *offsetp, int *windowp)
{
	/* attribute mode */
	it8368_mode(pch, IT8368_ATTR_MODE, IT8368_WIDTH_16);

	*offsetp = card_addr;
	DPRINTF(("it8368_chip_mem_map %#x+%#x\n",
	    (unsigned)pcmhp->memh, (unsigned)size));

	return (0);
}

void 
it8368_chip_mem_unmap(pcmcia_chipset_handle_t pch, int window)
{
	/* return to I/O mode */
	it8368_mode(pch, IT8368_IO_MODE, IT8368_WIDTH_16);
}

void
it8368_mode(pcmcia_chipset_handle_t pch, int io, int width)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;
	txreg_t reg32;	

	DPRINTF(("it8368_mode: change access space to "));
	DPRINTF((io ? "I/O (%dbit)\n" : "attribute (%dbit)...\n",
	    width == IT8368_WIDTH_8 ? 8 : 16));

	reg32 = tx_conf_read(sc->sc_tc, TX39_MEMCONFIG3_REG);
	
	if (io) {
		if (width == IT8368_WIDTH_8)
			reg32 |= TX39_MEMCONFIG3_PORT8SEL;
		else
			reg32 &= ~TX39_MEMCONFIG3_PORT8SEL;
	}

	if (!sc->sc_fixattr) {
		if (io)
			reg32 |= TX39_MEMCONFIG3_CARD1IOEN;
		else
			reg32 &= ~TX39_MEMCONFIG3_CARD1IOEN;
	}
	tx_conf_write(sc->sc_tc, TX39_MEMCONFIG3_REG, reg32);

#ifdef IT8368DEBUG
	if (sc->sc_fixattr)
		return; /* No need to report BIU status */

	/* check BIU status */
	reg32 = tx_conf_read(sc->sc_tc, TX39_MEMCONFIG3_REG);
	if (reg32 & TX39_MEMCONFIG3_CARD1IOEN) {
		DPRINTF(("it8368_mode: I/O space (%dbit) enabled\n",
		    reg32 & TX39_MEMCONFIG3_PORT8SEL ? 8 : 16));
	} else {
		DPRINTF(("it8368_mode: atttribute space enabled\n"));
	}
#endif /* IT8368DEBUG */
}

int 
it8368_chip_io_alloc(pcmcia_chipset_handle_t pch, bus_addr_t start,
    bus_size_t size, bus_size_t align, struct pcmcia_io_handle *pcihp)
{
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;

	if (start) {
		if (bus_space_map(sc->sc_csiot, start, size, 0, 
		    &pcihp->ioh)) {
			return (1);
		}
		DPRINTF(("it8368_chip_io_alloc map port %#x+%#x\n",
		    (unsigned)start, (unsigned)size));
	} else {
		if (bus_space_alloc(sc->sc_csiot, sc->sc_csiobase,
		    sc->sc_csiobase + sc->sc_csiosize,
		    size, align, 0, 0, &pcihp->addr, 
		    &pcihp->ioh)) {
				    
			return (1);
		}
		pcihp->flags = PCMCIA_IO_ALLOCATED;
		DPRINTF(("it8368_chip_io_alloc alloc %#x from %#x\n",
		    (unsigned)size, (unsigned)pcihp->addr));
	}

	pcihp->iot = sc->sc_csiot;
	pcihp->size = size;
	
	return (0);
}

int 
it8368_chip_io_map(pcmcia_chipset_handle_t pch, int width, bus_addr_t offset,
    bus_size_t size, struct pcmcia_io_handle *pcihp, int *windowp)
{
	/* I/O mode */
	it8368_mode(pch, IT8368_IO_MODE, IT8368_WIDTH_16);

	DPRINTF(("it8368_chip_io_map %#x:%#x+%#x\n",
	    (unsigned)pcihp->ioh, (unsigned)offset, (unsigned)size));

	return (0);
}

void 
it8368_chip_io_free(pcmcia_chipset_handle_t pch,
    struct pcmcia_io_handle *pcihp)
{
	if (pcihp->flags & PCMCIA_IO_ALLOCATED)
		bus_space_free(pcihp->iot, pcihp->ioh, pcihp->size);
	else
		bus_space_unmap(pcihp->iot, pcihp->ioh, pcihp->size);

	DPRINTF(("it8368_chip_io_free %#x+%#x\n", 
	    (unsigned)pcihp->ioh, (unsigned)pcihp->size));
}

void 
it8368_chip_io_unmap(pcmcia_chipset_handle_t pch, int window)
{

}

void
it8368_chip_socket_enable(pcmcia_chipset_handle_t pch)
{
#ifndef WINCE_DEFAULT_SETTING
	struct it8368e_softc *sc = (struct it8368e_softc*)pch;
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	volatile u_int16_t reg;

	/* Power off */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAOUT_REG);
	reg &= ~(IT8368_PIN_CRDVCCMASK | IT8368_PIN_CRDVPPMASK);
	reg |= (IT8368_PIN_CRDVCC_0V | IT8368_PIN_CRDVPP_0V);
	it8368_reg_write(csregt, csregh, IT8368_GPIODATAOUT_REG, reg);
	delay(20000);

	/* 
	 * wait 300ms until power fails (Tpf).  Then, wait 100ms since
	 * we are changing Vcc (Toff).
	 */
	delay((300 + 100) * 1000);

	/* Supply Vcc */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAOUT_REG);
	reg &= ~(IT8368_PIN_CRDVCCMASK | IT8368_PIN_CRDVPPMASK);
	reg |= IT8368_PIN_CRDVCC_5V; /* XXX */
	it8368_reg_write(csregt, csregh, IT8368_GPIODATAOUT_REG, reg);

	/*
	 * wait 100ms until power raise (Tpr) and 20ms to become
	 * stable (Tsu(Vcc)).
	 *
	 * some machines require some more time to be settled
	 * (300ms is added here).
	 */
	delay((100 + 20 + 300) * 1000);

	/* Assert reset signal */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAOUT_REG);
	reg |= IT8368_PIN_BCRDRST;
	it8368_reg_write(csregt, csregh, IT8368_GPIODATAOUT_REG, reg);

	/*
	 * hold RESET at least 10us.
	 */
	delay(10);

	/* deassert reset signal */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAOUT_REG);
	reg &= ~IT8368_PIN_BCRDRST;	
	it8368_reg_write(csregt, csregh, IT8368_GPIODATAOUT_REG, reg);
	delay(20000);

	DPRINTF(("it8368_chip_socket_enable: socket enabled\n"));
#endif /* !WINCE_DEFAULT_SETTING */
}

void
it8368_chip_socket_disable(pcmcia_chipset_handle_t pch)
{
#ifndef WINCE_DEFAULT_SETTING
	struct it8368e_softc *sc = (struct it8368e_softc*) pch;
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;
	u_int16_t reg;

	/* Power down */
	reg = it8368_reg_read(csregt, csregh, IT8368_GPIODATAOUT_REG);
	reg &= ~(IT8368_PIN_CRDVCCMASK | IT8368_PIN_CRDVPPMASK);
	reg |= (IT8368_PIN_CRDVCC_0V | IT8368_PIN_CRDVPP_0V);
	it8368_reg_write(csregt, csregh, IT8368_GPIODATAOUT_REG, reg);
	delay(20000);

	/*
	 * wait 300ms until power fails (Tpf).
	 */
	delay(300 * 1000);

	DPRINTF(("it8368_chip_socket_disable: socket disabled\n"));
#endif /* !WINCE_DEFAULT_SETTING */
}

#ifdef IT8368DEBUG
#define PRINTGPIO(m) __dbg_bit_print(it8368_reg_read(csregt, csregh,		\
	IT8368_GPIO##m##_REG), 0, IT8368_GPIO_MAX, #m, DBG_BIT_PRINT_COUNT)
#define PRINTMFIO(m) __dbg_bit_print(it8368_reg_read(csregt, csregh,		\
	IT8368_MFIO##m##_REG), 0, IT8368_MFIO_MAX, #m, DBG_BIT_PRINT_COUNT)
void
it8368_dump(struct it8368e_softc *sc)
{
	bus_space_tag_t csregt = sc->sc_csregt;
	bus_space_handle_t csregh = sc->sc_csregh;

	printf("[GPIO]\n");
	PRINTGPIO(DIR);
	PRINTGPIO(DATAIN);
	PRINTGPIO(DATAOUT);
	PRINTGPIO(POSINTEN);	
	PRINTGPIO(NEGINTEN);
	PRINTGPIO(POSINTSTAT);
	PRINTGPIO(NEGINTSTAT);
	printf("[MFIO]\n");
	PRINTMFIO(SEL);
	PRINTMFIO(DIR);
	PRINTMFIO(DATAIN);
	PRINTMFIO(DATAOUT);
	PRINTMFIO(POSINTEN);	
	PRINTMFIO(NEGINTEN);
	PRINTMFIO(POSINTSTAT);
	PRINTMFIO(NEGINTSTAT);
	__dbg_bit_print(it8368_reg_read(csregt, csregh, IT8368_CTRL_REG), 0, 15,
	    "CTRL", DBG_BIT_PRINT_COUNT);
	__dbg_bit_print(it8368_reg_read(csregt, csregh, IT8368_GPIODATAIN_REG),
	    8, 11, "]CRDDET/SENSE[", DBG_BIT_PRINT_COUNT);
}
#endif /* IT8368DEBUG */