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Initial revision

/*	$OpenBSD: if_le.c,v 1.31 2006/01/11 07:21:58 miod Exp $ */

/*-
 * Copyright (c) 1982, 1992, 1993
 *	The Regents of the University of California.  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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 *	@(#)if_le.c	8.2 (Berkeley) 10/30/93
 */

#include "bpfilter.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>

#include <net/if.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif

#include <net/if_media.h>

#include <machine/autoconf.h>
#include <machine/cpu.h>

#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>

#include <mvme68k/dev/if_lereg.h>
#include <mvme68k/dev/if_levar.h>
#include <mvme68k/dev/vme.h>

#include "pcc.h"
#if NPCC > 0
#include <mvme68k/dev/pccreg.h>
#endif

/* autoconfiguration driver */
void  leattach(struct device *, struct device *, void *);
int   lematch(struct device *, void *, void *);

struct cfattach le_ca = {
	sizeof(struct le_softc), lematch, leattach
};

static int lebustype;

void lewrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
u_int16_t lerdcsr(struct am7990_softc *, u_int16_t);
void vlewrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
u_int16_t vlerdcsr(struct am7990_softc *, u_int16_t);
void nvram_cmd(struct am7990_softc *, u_char, u_short);
u_int16_t nvram_read(struct am7990_softc *, u_char);
void vleetheraddr(struct am7990_softc *);
void vleinit(struct am7990_softc *);
void vlereset(struct am7990_softc *);
int vle_intr(void *);
void vle_copytobuf_contig(struct am7990_softc *, void *, int, int);
void vle_zerobuf_contig(struct am7990_softc *, int, int);

/* send command to the nvram controller */
void
nvram_cmd(sc, cmd, addr)
	struct am7990_softc *sc;
	u_char cmd;
	u_short addr;
{
	int i;
	struct vlereg1 *reg1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;

	for (i=0;i<8;i++) {
		reg1->ler1_ear=((cmd|(addr<<1))>>i); 
		CDELAY; 
	} 
}

/* read nvram one bit at a time */
u_int16_t
nvram_read(sc, nvram_addr)
	struct am7990_softc *sc;
	u_char nvram_addr;
{
	u_short val = 0, mask = 0x04000;
	u_int16_t wbit;
	/* these used by macros DO NOT CHANGE!*/
	struct vlereg1 *reg1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;
	((struct le_softc *)sc)->csr = 0x4f;
	ENABLE_NVRAM;
	nvram_cmd(sc, NVRAM_RCL, 0);
	DISABLE_NVRAM;
	CDELAY;
	ENABLE_NVRAM;
	nvram_cmd(sc, NVRAM_READ, nvram_addr);
	for (wbit=0; wbit<15; wbit++) {
		(reg1->ler1_ear & 0x01) ? (val = (val | mask)) : (val = (val & (~mask)));
		mask = mask>>1;
		CDELAY;
	}
	(reg1->ler1_ear & 0x01) ? (val = (val | 0x8000)) : (val = (val & 0x7FFF));
	CDELAY;
	DISABLE_NVRAM;
	return (val);
}

void
vleetheraddr(sc)
	struct am7990_softc *sc;
{
	u_char * cp = sc->sc_arpcom.ac_enaddr;
	u_int16_t ival[3];
	u_char i;

	for (i=0; i<3; i++) {
		ival[i] = nvram_read(sc, i);
	}
	memcpy(cp, &ival[0], 6);
}

void
lewrcsr(sc, port, val)
	struct am7990_softc *sc;
	u_int16_t port, val;
{
	register struct lereg1 *ler1 = (struct lereg1 *)((struct le_softc *)sc)->sc_r1;

	ler1->ler1_rap = port;
	ler1->ler1_rdp = val;
}

void
vlewrcsr(sc, port, val)
	struct am7990_softc *sc;
	u_int16_t port, val;
{
	register struct vlereg1 *ler1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;

	ler1->ler1_rap = port;
	ler1->ler1_rdp = val;
}

u_int16_t
lerdcsr(sc, port)
	struct am7990_softc *sc;
	u_int16_t port;
{
	register struct lereg1 *ler1 = (struct lereg1 *)((struct le_softc *)sc)->sc_r1;
	u_int16_t val;

	ler1->ler1_rap = port;
	val = ler1->ler1_rdp;
	return (val);
}

u_int16_t
vlerdcsr(sc, port)
	struct am7990_softc *sc;
	u_int16_t port;
{
	register struct vlereg1 *ler1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;
	u_int16_t val;

	ler1->ler1_rap = port;
	val = ler1->ler1_rdp;
	return (val);
}

/* init MVME376, set ipl and vec */
void
vleinit(sc)
	struct am7990_softc *sc;
{
	register struct vlereg1 *reg1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;
	u_char vec = ((struct le_softc *)sc)->sc_vec;
	u_char ipl = ((struct le_softc *)sc)->sc_ipl;
	((struct le_softc *)sc)->csr = 0x4f;
	WRITE_CSR_AND( ~ipl );
	SET_VEC(vec);
	return;
}

/* MVME376 hardware reset */
void
vlereset(sc)
	struct am7990_softc *sc;
{
	register struct vlereg1 *reg1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;
	RESET_HW;
#ifdef LEDEBUG
	if (sc->sc_debug) {
		printf("\nle: hardware reset\n");
	}
#endif
	SYSFAIL_CL;
	return;
}

int
vle_intr(sc)
	void *sc;
{
	register struct vlereg1 *reg1 = (struct vlereg1 *)((struct le_softc *)sc)->sc_r1;
	int rc;
	rc = am7990_intr(sc);
	ENABLE_INTR;
	return (rc);
}

void
vle_copytobuf_contig(sc, from, boff, len)
	struct am7990_softc *sc;
	void *from;
	int boff, len;
{
	volatile caddr_t buf = sc->sc_mem;

	/* 
	 * Do the cache stuff 
	 */
	dma_cachectl(buf + boff, len);
	/*
	 * Just call bcopy() to do the work.
	 */
	bcopy(from, buf + boff, len);
}

void
vle_zerobuf_contig(sc, boff, len)
	struct am7990_softc *sc;
	int boff, len;
{
	volatile caddr_t buf = sc->sc_mem;
	/* 
	 * Do the cache stuff 
	 */
	dma_cachectl(buf + boff, len);
	/*
	 * Just let bzero() do the work
	 */
	bzero(buf + boff, len);
}

int
lematch(parent, vcf, args)
	struct device *parent;
	void *vcf, *args;
{
	struct confargs *ca = args;
	/* check physical addr for bogus MVME162 addr @0xffffd200. weird XXX - smurph */
	if (cputyp == CPU_162 && ca->ca_paddr == 0xffffd200)
		return (0);

	return (!badvaddr((vaddr_t)ca->ca_vaddr, 2));
}

/*
 * Interface exists: make available by filling in network interface
 * record.  System will initialize the interface when it is ready
 * to accept packets.
 */
void
leattach(parent, self, aux)
	struct device *parent;
	struct device *self;
	void *aux;
{
	register struct le_softc *lesc = (struct le_softc *)self;
	struct am7990_softc *sc = &lesc->sc_am7990;
	struct confargs *ca = aux;
	int pri = ca->ca_ipl;
	extern void *etherbuf;
	paddr_t addr;
	int card;

	/* XXX the following declarations should be elsewhere */
	extern void myetheraddr(u_char *);

	lebustype = ca->ca_bustype;

	switch (lebustype) {
	case BUS_VMES:
		/* 
		 * get the first available etherbuf.  MVME376 uses its own
		 * dual-ported RAM for etherbuf.  It is set by dip switches
		 * on board.  We support the six Motorola address locations,
		 * however, the board can be set up at any other address.
		 * XXX These physical addresses should be mapped in extio!!!
		 */
		switch (ca->ca_paddr) {
		case 0xffff1200:
			card = 0;
			break;
		case 0xffff1400:
			card = 1;
			break;
		case 0xffff1600:
			card = 2;
			break;
		case 0xffff5400:
			card = 3;
			break;
		case 0xffff5600:
			card = 4;
			break;
		case 0xffffa400:
			card = 5;
			break;
		default:
			printf(": unsupported address\n");
			return;
		}

		addr = VLEMEMBASE - (card * VLEMEMSIZE);

		sc->sc_mem = (void *)mapiodev(addr, VLEMEMSIZE);
		if (sc->sc_mem == NULL) {
			printf("\n%s: no more memory in external I/O map\n",
			    sc->sc_dev.dv_xname);
			return;
		}
		sc->sc_addr = addr & 0x00ffffff;

		lesc->sc_r1 = (void *)ca->ca_vaddr;
		lesc->sc_ipl = ca->ca_ipl;
		lesc->sc_vec = ca->ca_vec;
		sc->sc_memsize = VLEMEMSIZE;
		sc->sc_conf3 = LE_C3_BSWP;
		sc->sc_hwreset = vlereset;
		sc->sc_rdcsr = vlerdcsr;
		sc->sc_wrcsr = vlewrcsr;
		sc->sc_hwinit = vleinit;
		sc->sc_copytodesc = vle_copytobuf_contig;
		sc->sc_copyfromdesc = am7990_copyfrombuf_contig;
		sc->sc_copytobuf = vle_copytobuf_contig;
		sc->sc_copyfrombuf = am7990_copyfrombuf_contig;
		sc->sc_zerobuf = am7990_zerobuf_contig;
		/* get ether address */
		vleetheraddr(sc);
		break;      
	case BUS_PCC:
		sc->sc_mem = etherbuf;
		lesc->sc_r1 = (void *)ca->ca_vaddr;
		sc->sc_conf3 = LE_C3_BSWP /*| LE_C3_ACON | LE_C3_BCON*/;
		sc->sc_addr = kvtop((vaddr_t)sc->sc_mem);
		sc->sc_memsize = LEMEMSIZE;
		sc->sc_rdcsr = lerdcsr;
		sc->sc_wrcsr = lewrcsr;
		sc->sc_hwreset = NULL;
		sc->sc_hwinit = NULL;
		sc->sc_copytodesc = am7990_copytobuf_contig;
		sc->sc_copyfromdesc = am7990_copyfrombuf_contig;
		sc->sc_copytobuf = am7990_copytobuf_contig;
		sc->sc_copyfrombuf = am7990_copyfrombuf_contig;
		sc->sc_zerobuf = am7990_zerobuf_contig;
		/* get ether address */
		myetheraddr(sc->sc_arpcom.ac_enaddr);
		break;
	default:
		printf(": unknown bus type\n");
		return;
	}

	am7990_config(sc);

	/* connect the interrupt */
	switch (lebustype) {
	case BUS_VMES:
		lesc->sc_ih.ih_fn = vle_intr;
		lesc->sc_ih.ih_arg = sc;
		lesc->sc_ih.ih_ipl = pri;
		vmeintr_establish(ca->ca_vec + 0, &lesc->sc_ih, self->dv_xname);
		break;
#if NPCC > 0
	case BUS_PCC:
		lesc->sc_ih.ih_fn = am7990_intr;
		lesc->sc_ih.ih_arg = sc;
		lesc->sc_ih.ih_ipl = pri;
		pccintr_establish(PCCV_LE, &lesc->sc_ih, self->dv_xname);
		sys_pcc->pcc_leirq = pri | PCC_IRQ_IEN;
		break;
#endif
	}
}