/*	$OpenBSD: vme.c,v 1.24 2005/11/27 14:19:09 miod Exp $ */

/*
 * Copyright (c) 1995 Theo de Raadt
 * Copyright (c) 2000 Steve Murphree, Jr.
 * 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.
 *
 * 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.
 */

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/tty.h>
#include <sys/uio.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/fcntl.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <mvme68k/dev/vme.h>

#include "pcc.h"
#include "mc.h"
#include "pcctwo.h"

#if NPCC > 0
#include <mvme68k/dev/pccreg.h>
#endif
#if NMC > 0
#include <mvme68k/dev/mcreg.h>
#endif
#if NPCCTWO > 0
#include <mvme68k/dev/pcctworeg.h>
#endif

int  vmematch(struct device *, void *, void *);
void vmeattach(struct device *, struct device *, void *);

void vme1chip_init(struct vmesoftc *sc);
void vme2chip_init(struct vmesoftc *sc);
paddr_t vme2chip_map(u_long base, int len, int dwidth);
int vme2abort(void *);

void vmeunmap(vaddr_t, int);
int vmeprint(void *, const char *);

static int vmebustype;

struct vme2reg *sys_vme2;

struct cfattach vme_ca = {
	sizeof(struct vmesoftc), vmematch, vmeattach
};

struct cfdriver vme_cd = {
	NULL, "vme", DV_DULL
};

int
vmematch(parent, cf, args)
	struct device *parent;
	void *cf;
	void *args;
{
#if NMC > 0
	struct confargs *ca = args;

	if (ca->ca_bustype == BUS_MC) {
		if (sys_mc->mc_ver & MC_VER_NOVME)
			return (0);
	}
#endif
	return (1);
}

#if defined(MVME162) || defined(MVME167) || defined(MVME177)
/*
 * make local addresses 1G-2G correspond to VME addresses 3G-4G,
 * as D32
 */
#define VME2_D32STARTPHYS	(1*1024*1024*1024UL)
#define VME2_D32ENDPHYS		(2*1024*1024*1024UL)
#define VME2_D32STARTVME	(3*1024*1024*1024UL)
#define VME2_D32BITSVME		(3*1024*1024*1024UL)

/*
 * make local addresses 3G-3.75G correspond to VME addresses 3G-3.75G,
 * as D16
 */
#define VME2_D16STARTPHYS	(3*1024*1024*1024UL)
#define VME2_D16ENDPHYS		(3*1024*1024*1024UL + 768*1024*1024UL)
#endif

/*
 * Returns a physical address mapping for a VME address & length.
 * Note: on some hardware it is not possible to create certain
 * mappings, ie. the MVME147 cannot do 32 bit accesses to VME bus
 * addresses from 0 to physmem.
 */
paddr_t
vmepmap(sc, vmeaddr, len, bustype)
	struct vmesoftc *sc;
	paddr_t vmeaddr;
	int len;
	int bustype;
{
	paddr_t base = vmeaddr;

	len = roundup(len, NBPG);
	switch (vmebustype) {
#if NPCC > 0
	case BUS_PCC:
		switch (bustype) {
		case BUS_VMES:
#ifdef DEBUG
			printf("base %8p/0x%8x len 0x%x\n",
				vmeaddr, base, len);
#endif
			if (base > VME1_A16BASE &&
			    (base+len - VME1_A16BASE) < VME1_A16D16LEN) {
				base = base - VME1_A16BASE + VME1_A16D16BASE;
#ifdef DEBUG
				printf("vmes1: base = 0x%8x\n", base); /* 1:1 */
#endif
			} else if (base > VME1_A32D16BASE &&
			    base+len < VME1_A16BASE) {
				/* 1:1 mapped */
#ifdef DEBUG
				printf("vmes2: base = 0x%8x\n", base);
#endif
			} else {
				printf("%s: cannot map pa 0x%x len 0x%x\n",
				    sc->sc_dev.dv_xname, base, len);
				return (0);
			}
			break;
		case BUS_VMEL:
			if (base >= physmem && (base+len) < VME1_A32D32LEN)
				base = base + VME1_A32D32BASE;
			else if (base+len < VME1_A32D16LEN)		/* HACK! */
				base = base + VME1_A32D16BASE;
			else {
				printf("%s: cannot map pa 0x%x len 0x%x\n",
				    sc->sc_dev.dv_xname, base, len);
				return (0);
			}
			break;
		}
		break;
#endif
#if NMC > 0 || NPCCTWO > 0
	case BUS_MC:
	case BUS_PCCTWO:
		switch (bustype) {
		case BUS_VMES:
#ifdef DEBUG
			printf("base %x len %d\n", base, len);
#endif
			if (base > VME2_A16BASE &&
			    (base+len-VME2_A16BASE) < VME2_A16D16LEN) {
				/* XXX busted? */
				base = base - VME2_A16BASE + VME2_A16D16BASE;
			} else if (base > VME2_A24BASE &&
			    (base+len-VME2_A24BASE) < VME2_A24D16LEN) {
				base = base - VME2_A24BASE + VME2_D16STARTPHYS;
			} else if ((base+len) < VME2_A32D16LEN) {
				/* XXX busted? */
				base = base + VME2_A32D16BASE;
			} else {
#ifdef DEBUG
				printf("vme2chip_map\n");
#endif
				base = vme2chip_map(base, len, 16);
			}
			break;
		case BUS_VMEL:
#if 0
			if (base > VME2_A16BASE &&
			    (base+len-VME2_A16BASE) < VME2_A16D32LEN)
				base = base - VME2_A16BASE + VME2_A16D32BASE;
#endif
			base = vme2chip_map(base, len, 32);
			break;
		}
		break;
#endif
	}
	return (base);
}

/* if successful, returns the va of a vme bus mapping */
vaddr_t
vmemap(sc, vmeaddr, len, bustype)
	struct vmesoftc *sc;
	paddr_t vmeaddr;
	int len;
	int bustype;
{
	paddr_t pa;
	vaddr_t va;

	pa = vmepmap(sc, vmeaddr, len, bustype);
	if (pa == 0)
		return (0);
	va = mapiodev(pa, len);
	return (va);
}

void
vmeunmap(va, len)
	vaddr_t va;
	int len;
{
	unmapiodev(va, len);
}

int
vmerw(sc, uio, flags, bus)
	struct vmesoftc *sc;
	struct uio *uio;
	int flags;
	int bus;
{
	vaddr_t v;
	int c;
	struct iovec *iov;
	vaddr_t vme;
	int error = 0;

	while (uio->uio_resid > 0 && error == 0) {
		iov = uio->uio_iov;
		if (iov->iov_len == 0) {
			uio->uio_iov++;
			uio->uio_iovcnt--;
			if (uio->uio_iovcnt < 0)
				panic("vmerw");
			continue;
		}

		v = uio->uio_offset;
		c = min(iov->iov_len, MAXPHYS);
		if ((v & PGOFSET) + c > NBPG)	/* max NBPG at a time */
			c = NBPG - (v & PGOFSET);
		if (c == 0)
			return (0);
		vme = vmemap(sc, trunc_page(v), NBPG, BUS_VMES);
		if (vme == 0) {
			error = EFAULT;	/* XXX? */
			continue;
		}
		error = uiomove((void *)vme + (v & PGOFSET), c, uio);
		vmeunmap(vme, NBPG);
	}
	return (error);
}

int
vmeprint(args, bus)
	void *args;
	const char *bus;
{
	struct confargs *ca = args;

	printf(" addr 0x%x", ca->ca_offset);
	if (ca->ca_vec > 0)
		printf(" vec 0x%x", ca->ca_vec);
	if (ca->ca_ipl > 0)
		printf(" ipl %d", ca->ca_ipl);
	return (UNCONF);
}

int
vmescan(parent, child, args, bustype)
	struct device *parent;
	void *child, *args;
	int bustype;
{
	struct cfdata *cf = child;
	struct vmesoftc *sc = (struct vmesoftc *)parent;
	struct confargs oca;

	bzero(&oca, sizeof oca);
	oca.ca_bustype = bustype;
	oca.ca_paddr = cf->cf_loc[0];
	oca.ca_vec = cf->cf_loc[1];
	oca.ca_ipl = cf->cf_loc[2];
	if (oca.ca_ipl > 0 && oca.ca_vec == -1)
		oca.ca_vec = intr_findvec(255, 0);

	oca.ca_offset = oca.ca_paddr;
	oca.ca_vaddr = vmemap(sc, oca.ca_paddr, PAGE_SIZE, oca.ca_bustype);
	if (oca.ca_vaddr == 0)
		oca.ca_vaddr = (vaddr_t)-1;
	oca.ca_name = cf->cf_driver->cd_name;
	if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0) {
		if (oca.ca_vaddr != (vaddr_t)-1)
			vmeunmap(oca.ca_vaddr, PAGE_SIZE);
		return (0);
	}
	/*
	 * If match works, the driver is responsible for
	 * vmunmap()ing if it does not need the mapping. 
	 */
	config_attach(parent, cf, &oca, vmeprint);
	return (1);
}

void
vmeattach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	struct vmesoftc *sc = (struct vmesoftc *)self;
	struct confargs *ca = args;
#if NPCC > 0
	struct vme1reg *vme1;
#endif
#if NMC > 0 || NPCCTWO > 0
	struct vme2reg *vme2;
#endif

	sc->sc_vaddr = ca->ca_vaddr;

	vmebustype = ca->ca_bustype;
	switch (ca->ca_bustype) {
#if NPCC > 0
	case BUS_PCC:
		vme1 = (struct vme1reg *)sc->sc_vaddr;
		if (vme1->vme1_scon & VME1_SCON_SWITCH)
			printf(": system controller");
		printf("\n");
		vme1chip_init(sc);
		break;
#endif
#if NMC > 0 || NPCCTWO > 0
	case BUS_MC:
	case BUS_PCCTWO:
		vme2 = (struct vme2reg *)sc->sc_vaddr;
		if (vme2->vme2_tctl & VME2_TCTL_SCON)
			printf(": system controller");
		printf("\n");
		vme2chip_init(sc);
		break;
#endif
	}

	while (config_found(self, NULL, NULL))
		;
}

/*
 * On the VMEbus, only one cpu may be configured to respond to any
 * particular vme ipl. Therefore, it wouldn't make sense to globally
 * enable all the interrupts all the time -- it would not be possible
 * to put two cpu's and one vme card into a single cage. Rather, we
 * enable each vme interrupt only when we are attaching a device that
 * uses it. This makes it easier (though not trivial) to put two cpu
 * cards in one VME cage, and both can have some limited access to vme
 * interrupts (just can't share the same irq).
 * Obviously no check is made to see if another cpu is using that
 * interrupt. If you share you will lose.
 */
int
vmeintr_establish(vec, ih, name)
	int vec;
	struct intrhand *ih;
	const char *name;
{
	struct vmesoftc *sc = (struct vmesoftc *) vme_cd.cd_devs[0];
#if NPCC > 0
	struct vme1reg *vme1;
#endif
#if NMC > 0 || NPCCTWO > 0
	struct vme2reg *vme2;
#endif
	int x;

	x = intr_establish(vec, ih, name);

	switch (vmebustype) {
#if NPCC > 0
	case BUS_PCC:
		vme1 = (struct vme1reg *)sc->sc_vaddr;
		vme1->vme1_irqen = vme1->vme1_irqen |
		    VME1_IRQ_VME(ih->ih_ipl);
		break;
#endif
#if NMC > 0 || NPCCTWO > 0
	case BUS_MC:
	case BUS_PCCTWO:
		vme2 = (struct vme2reg *)sc->sc_vaddr;
		vme2->vme2_irqen = vme2->vme2_irqen |
		    VME2_IRQ_VME(ih->ih_ipl);
		break;
#endif
	}
	return (x);
}

#if defined(MVME147)
void
vme1chip_init(sc)
	struct vmesoftc *sc;
{
	struct vme1reg *vme1 = (struct vme1reg *)sc->sc_vaddr;

	vme1->vme1_scon &= ~VME1_SCON_SYSFAIL;	/* XXX doesn't work */
}
#endif


#if defined(MVME162) || defined(MVME167) || defined(MVME177)

/*
 * XXX what AM bits should be used for the D32/D16 mappings?
 */
void
vme2chip_init(sc)
	struct vmesoftc *sc;
{
	struct vme2reg *vme2 = (struct vme2reg *)sc->sc_vaddr;
	u_long ctl;

	sys_vme2 = vme2;

	/* turn off SYSFAIL LED */
	vme2->vme2_tctl &= ~VME2_TCTL_SYSFAIL;

	/*
	 * Display the VMEChip2 decoder status.
	 */
	printf("%s: using BUG parameters\n", sc->sc_dev.dv_xname);
	ctl = vme2->vme2_gcsrctl;
	if (ctl & VME2_GCSRCTL_MDEN1) {
		printf("%s: 1phys 0x%08lx-0x%08lx to VME 0x%08lx-0x%08lx\n",
		    sc->sc_dev.dv_xname,
		    vme2->vme2_master1 << 16, vme2->vme2_master1 & 0xffff0000,
		    vme2->vme2_master1 << 16, vme2->vme2_master1 & 0xffff0000);
	}
	if (ctl & VME2_GCSRCTL_MDEN2) {
		printf("%s: 2phys 0x%08lx-0x%08lx to VME 0x%08lx-0x%08lx\n",
		    sc->sc_dev.dv_xname,
		    vme2->vme2_master2 << 16, vme2->vme2_master2 & 0xffff0000,
		    vme2->vme2_master2 << 16, vme2->vme2_master2 & 0xffff0000);
	}
	if (ctl & VME2_GCSRCTL_MDEN3) {
		printf("%s: 3phys 0x%08lx-0x%08lx to VME 0x%08lx-0x%08lx\n",
		    sc->sc_dev.dv_xname,
		    vme2->vme2_master3 << 16, vme2->vme2_master3 & 0xffff0000,
		    vme2->vme2_master3 << 16, vme2->vme2_master3 & 0xffff0000);
	}
	if (ctl & VME2_GCSRCTL_MDEN4) {
		printf("%s: 4phys 0x%08lx-0x%08lx to VME 0x%08lx-0x%08lx\n",
		    sc->sc_dev.dv_xname,
		    vme2->vme2_master4 << 16, vme2->vme2_master4 & 0xffff0000,
		    (vme2->vme2_master4 << 16) + (vme2->vme2_master4mod << 16),
		    (vme2->vme2_master4 & 0xffff0000) +
		      (vme2->vme2_master4mod & 0xffff0000));
	}

	/*
	 * Map the VME irq levels to the cpu levels 1:1.
	 * This is rather inflexible, but much easier.
	 */
	vme2->vme2_irql4 = (7 << VME2_IRQL4_VME7SHIFT) |
	    (6 << VME2_IRQL4_VME6SHIFT) | (5 << VME2_IRQL4_VME5SHIFT) |
	    (4 << VME2_IRQL4_VME4SHIFT) | (3 << VME2_IRQL4_VME3SHIFT) |
	    (2 << VME2_IRQL4_VME2SHIFT) | (1 << VME2_IRQL4_VME1SHIFT);
	printf("%s: vme to cpu irq level 1:1\n",sc->sc_dev.dv_xname);

#if NPCCTWO > 0
	if (vmebustype == BUS_PCCTWO) {
		/* 
		 * pseudo driver, abort interrupt handler
		 */
		sc->sc_abih.ih_fn = vme2abort;
		sc->sc_abih.ih_ipl = 7;
		sc->sc_abih.ih_wantframe = 1;

		intr_establish(110, &sc->sc_abih, sc->sc_dev.dv_xname);	/* XXX 110 */
		vme2->vme2_irqen |= VME2_IRQ_AB;
	}
#endif
	/*
	 * Enable ACFAIL interrupt, but disable Timer 1 interrupt - we
	 * prefer it without for delay().
	 */
	vme2->vme2_irqen = (vme2->vme2_irqen | VME2_IRQ_ACF) & ~VME2_IRQ_TIC1;
}

/*
 * A32 accesses on the MVME1[67]x require setting up mappings in
 * the VME2 chip.
 * XXX VME address must be between 2G and 4G
 * XXX We only support D32 at the moment..
 */
u_long
vme2chip_map(base, len, dwidth)
	u_long base;
	int len, dwidth;
{
	switch (dwidth) {
	case 16:
		if (base < VME2_D16STARTPHYS ||
		    base + (u_long)len > VME2_D16ENDPHYS)
			return (NULL);
		return (base);
	case 32:
		if (base < VME2_D32STARTVME)
			return (NULL);
		return (base - VME2_D32STARTVME + VME2_D32STARTPHYS);
	default:
		return (NULL);
	}
}

#if NPCCTWO > 0
int
vme2abort(frame)
	void *frame;
{
	struct vmesoftc *sc = (struct vmesoftc *)vme_cd.cd_devs[0];
	struct vme2reg *vme2 = (struct vme2reg *)sc->sc_vaddr;

	if ((vme2->vme2_irqstat & VME2_IRQ_AB) == 0) {
		printf("%s: abort irq not set\n", sc->sc_dev.dv_xname);
		return (0);
	}
	vme2->vme2_irqclr = VME2_IRQ_AB;
	nmihand(frame);
	return (1);
}
#endif
#endif