329 lines
8.0 KiB
C
329 lines
8.0 KiB
C
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/*
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* Device driver for Specialix range (SI/XIO) of serial line multiplexors.
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*
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* Copyright (C) 2000, Peter Wemm <peter@netplex.com.au>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notices, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notices, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHORS BE LIABLE.
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*
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* $FreeBSD$
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*/
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#include "opt_debug_si.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/si/sireg.h>
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#include <dev/si/sivar.h>
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#include <isa/isavar.h>
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/* Look for a valid board at the given mem addr */
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static int
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si_isa_probe(device_t dev)
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{
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struct si_softc *sc;
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int type;
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u_int i, ramsize;
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volatile unsigned char was, *ux;
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volatile unsigned char *maddr;
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unsigned char *paddr;
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int unit;
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sc = device_get_softc(dev);
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unit = device_get_unit(dev);
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sc->sc_mem_rid = 0;
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sc->sc_mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
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&sc->sc_mem_rid,
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0, ~0, SIPROBEALLOC, RF_ACTIVE);
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if (!sc->sc_mem_res)
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return ENXIO;
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paddr = (caddr_t)rman_get_start(sc->sc_mem_res);/* physical */
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maddr = rman_get_virtual(sc->sc_mem_res); /* in kvm */
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DPRINT((0, DBG_AUTOBOOT, "si%d: probe at virtual=0x%x physical=0x%x\n",
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unit, maddr, paddr));
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/*
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* this is a lie, but it's easier than trying to handle caching
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* and ram conflicts in the >1M and <16M region.
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*/
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if ((caddr_t)paddr < (caddr_t)0xA0000 ||
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(caddr_t)paddr >= (caddr_t)0x100000) {
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printf("si%d: iomem (%p) out of range\n",
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unit, (void *)paddr);
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goto fail;
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}
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if (((u_int)paddr & 0x7fff) != 0) {
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: iomem (%x) not on 32k boundary\n", unit, paddr));
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goto fail;
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}
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/* Is there anything out there? (0x17 is just an arbitrary number) */
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*maddr = 0x17;
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if (*maddr != 0x17) {
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: 0x17 check fail at phys 0x%x\n", unit, paddr));
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goto fail;
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}
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/*
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* Let's look first for a JET ISA card, since that's pretty easy
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*
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* All jet hosts are supposed to have this string in the IDROM,
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* but it's not worth checking on self-IDing busses like PCI.
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*/
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{
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unsigned char *jet_chk_str = "JET HOST BY KEV#";
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for (i = 0; i < strlen(jet_chk_str); i++)
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if (jet_chk_str[i] != *(maddr + SIJETIDSTR + 2 * i))
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goto try_mk2;
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}
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL, "si%d: JET first check - 0x%x\n",
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unit, (*(maddr+SIJETIDBASE))));
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if (*(maddr+SIJETIDBASE) != (SISPLXID&0xff))
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goto try_mk2;
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL, "si%d: JET second check - 0x%x\n",
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unit, (*(maddr+SIJETIDBASE+2))));
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if (*(maddr+SIJETIDBASE+2) != ((SISPLXID&0xff00)>>8))
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goto try_mk2;
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/* It must be a Jet ISA or RIO card */
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL, "si%d: JET id check - 0x%x\n",
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unit, (*(maddr+SIUNIQID))));
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if ((*(maddr+SIUNIQID) & 0xf0) != 0x20)
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goto try_mk2;
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/* It must be a Jet ISA SI/XIO card */
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*(maddr + SIJETCONFIG) = 0;
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type = SIJETISA;
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ramsize = SIJET_RAMSIZE;
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goto got_card;
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try_mk2:
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/*
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* OK, now to see if whatever responded is really an SI card.
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* Try for a MK II next (SIHOST2)
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*/
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for (i = SIPLSIG; i < SIPLSIG + 8; i++)
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if ((*(maddr+i) & 7) != (~(unsigned char)i & 7))
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goto try_mk1;
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/* It must be an SIHOST2 */
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*(maddr + SIPLRESET) = 0;
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*(maddr + SIPLIRQCLR) = 0;
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*(maddr + SIPLIRQSET) = 0x10;
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type = SIHOST2;
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ramsize = SIHOST2_RAMSIZE;
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goto got_card;
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try_mk1:
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/*
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* Its not a MK II, so try for a MK I (SIHOST)
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*/
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*(maddr+SIRESET) = 0x0; /* reset the card */
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*(maddr+SIINTCL) = 0x0; /* clear int */
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*(maddr+SIRAM) = 0x17;
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if (*(maddr+SIRAM) != (unsigned char)0x17)
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goto fail;
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*(maddr+0x7ff8) = 0x17;
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if (*(maddr+0x7ff8) != (unsigned char)0x17) {
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: 0x17 check fail at phys 0x%x = 0x%x\n",
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unit, paddr+0x77f8, *(maddr+0x77f8)));
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goto fail;
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}
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/* It must be an SIHOST (maybe?) - there must be a better way XXX */
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type = SIHOST;
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ramsize = SIHOST_RAMSIZE;
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got_card:
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DPRINT((0, DBG_AUTOBOOT, "si%d: found type %d card, try memory test\n",
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unit, type));
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/* Try the acid test */
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ux = maddr + SIRAM;
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for (i = 0; i < ramsize; i++, ux++)
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*ux = (unsigned char)(i&0xff);
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ux = maddr + SIRAM;
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for (i = 0; i < ramsize; i++, ux++) {
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if ((was = *ux) != (unsigned char)(i&0xff)) {
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: match fail at phys 0x%x, was %x should be %x\n",
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unit, paddr + i, was, i&0xff));
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goto fail;
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}
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}
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/* clear out the RAM */
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ux = maddr + SIRAM;
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for (i = 0; i < ramsize; i++)
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*ux++ = 0;
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ux = maddr + SIRAM;
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for (i = 0; i < ramsize; i++) {
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if ((was = *ux++) != 0) {
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: clear fail at phys 0x%x, was %x\n",
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unit, paddr + i, was));
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goto fail;
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}
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}
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/*
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* Success, we've found a valid board, now fill in
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* the adapter structure.
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*/
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switch (type) {
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case SIHOST2:
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switch (isa_get_irq(dev)) {
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case 11:
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case 12:
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case 15:
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break;
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default:
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bad_irq:
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DPRINT((0, DBG_AUTOBOOT|DBG_FAIL,
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"si%d: bad IRQ value - %d\n",
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unit, isa_get_irq(dev)));
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goto fail;
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}
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sc->sc_memsize = SIHOST2_MEMSIZE;
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break;
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case SIHOST:
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switch (isa_get_irq(dev)) {
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case 11:
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case 12:
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case 15:
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break;
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default:
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goto bad_irq;
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}
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sc->sc_memsize = SIHOST_MEMSIZE;
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break;
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case SIJETISA:
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switch (isa_get_irq(dev)) {
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case 9:
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case 10:
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case 11:
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case 12:
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case 15:
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break;
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default:
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goto bad_irq;
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}
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sc->sc_memsize = SIJETISA_MEMSIZE;
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break;
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case SIMCA: /* MCA */
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default:
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printf("si%d: card type %d not supported\n", unit, type);
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goto fail;
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}
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sc->sc_type = type;
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->sc_mem_rid, sc->sc_mem_res);
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sc->sc_mem_res = 0;
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return (0); /* success! */
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fail:
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if (sc->sc_mem_res) {
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->sc_mem_rid, sc->sc_mem_res);
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sc->sc_mem_res = 0;
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}
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return(EINVAL);
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}
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static int
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si_isa_attach(device_t dev)
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{
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int error;
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void *ih;
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struct si_softc *sc;
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error = 0;
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ih = NULL;
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sc = device_get_softc(dev);
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sc->sc_mem_rid = 0;
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sc->sc_mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
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&sc->sc_mem_rid,
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0, ~0, 1, RF_ACTIVE);
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if (!sc->sc_mem_res) {
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device_printf(dev, "couldn't map memory\n");
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goto fail;
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}
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sc->sc_paddr = (caddr_t)rman_get_start(sc->sc_mem_res);
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sc->sc_maddr = rman_get_virtual(sc->sc_mem_res);
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sc->sc_irq_rid = 0;
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sc->sc_irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_irq_rid,
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0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
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if (!sc->sc_irq_res) {
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device_printf(dev, "couldn't allocate interrupt\n");
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goto fail;
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}
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sc->sc_irq = rman_get_start(sc->sc_irq_res);
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error = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_TTY,
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si_intr, sc,&ih);
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if (error) {
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device_printf(dev, "couldn't activate interrupt\n");
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goto fail;
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}
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error = siattach(dev);
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if (error)
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goto fail;
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return (0); /* success */
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fail:
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if (error == 0)
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error = ENXIO;
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if (sc->sc_irq_res) {
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if (ih)
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bus_teardown_intr(dev, sc->sc_irq_res, ih);
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bus_release_resource(dev, SYS_RES_IRQ,
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sc->sc_irq_rid, sc->sc_irq_res);
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sc->sc_irq_res = 0;
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}
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if (sc->sc_mem_res) {
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->sc_mem_rid, sc->sc_mem_res);
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sc->sc_mem_res = 0;
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}
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return (error);
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}
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static device_method_t si_isa_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, si_isa_probe),
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DEVMETHOD(device_attach, si_isa_attach),
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{ 0, 0 }
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};
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static driver_t si_isa_driver = {
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"si",
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si_isa_methods,
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sizeof(struct si_softc),
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};
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DRIVER_MODULE(si, isa, si_isa_driver, si_devclass, 0, 0);
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