/* $OpenBSD: pcc.c,v 1.6 2000/03/26 23:31:59 deraadt Exp $ */ /* * Copyright (c) 1995 Theo de Raadt * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed under OpenBSD by * Theo de Raadt for Willowglen Singapore. * 4. 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. */ /* * VME147 peripheral channel controller */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct pccsoftc { struct device sc_dev; void *sc_vaddr; void *sc_paddr; struct pccreg *sc_pcc; struct intrhand sc_nmiih; }; void pccattach __P((struct device *, struct device *, void *)); int pccmatch __P((struct device *, void *, void *)); int pccabort __P((struct frame *)); struct cfattach pcc_ca = { sizeof(struct pccsoftc), pccmatch, pccattach }; struct cfdriver pcc_cd = { NULL, "pcc", DV_DULL, 0 }; struct pccreg *sys_pcc = NULL; int pccmatch(parent, vcf, args) struct device *parent; void *vcf, *args; { struct cfdata *cf = vcf; struct confargs *ca = args; /* the pcc only exist on vme147's */ if (cputyp != CPU_147) return (0); return (!badvaddr(IIOV(ca->ca_paddr) + PCCSPACE_PCCCHIP_OFF, 1)); } int pcc_print(args, bus) void *args; const char *bus; { struct confargs *ca = args; if (ca->ca_offset != -1) printf(" offset 0x%x", ca->ca_offset); if (ca->ca_ipl > 0) printf(" ipl %d", ca->ca_ipl); return (UNCONF); } int pcc_scan(parent, child, args) struct device *parent; void *child, *args; { struct cfdata *cf = child; struct pccsoftc *sc = (struct pccsoftc *)parent; struct confargs *ca = args; struct confargs oca; if (parent->dv_cfdata->cf_driver->cd_indirect) { printf(" indirect devices not supported\n"); return 0; } bzero(&oca, sizeof oca); oca.ca_offset = cf->cf_loc[0]; oca.ca_ipl = cf->cf_loc[1]; if (oca.ca_offset != -1) { oca.ca_vaddr = sc->sc_vaddr + oca.ca_offset; oca.ca_paddr = sc->sc_paddr + oca.ca_offset; } else { oca.ca_vaddr = (void *)-1; oca.ca_paddr = (void *)-1; } oca.ca_bustype = BUS_PCC; oca.ca_master = (void *)sc->sc_pcc; oca.ca_name = cf->cf_driver->cd_name; if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0) return (0); config_attach(parent, cf, &oca, pcc_print); return (1); } void pccattach(parent, self, args) struct device *parent, *self; void *args; { struct confargs *ca = args; struct pccsoftc *sc = (struct pccsoftc *)self; int i; if (sys_pcc) panic("pcc already attached!"); /* * since we know ourself to land in intiobase land, * we must adjust our address */ sc->sc_paddr = ca->ca_paddr; sc->sc_vaddr = (void *)IIOV(sc->sc_paddr); sc->sc_pcc = (struct pccreg *)(sc->sc_vaddr + PCCSPACE_PCCCHIP_OFF); sys_pcc = sc->sc_pcc; printf(": rev %d\n", sc->sc_pcc->pcc_chiprev); sc->sc_nmiih.ih_fn = pccabort; sc->sc_nmiih.ih_arg = 0; sc->sc_nmiih.ih_ipl = 7; sc->sc_nmiih.ih_wantframe = 1; pccintr_establish(PCCV_ABORT, &sc->sc_nmiih); sc->sc_pcc->pcc_vecbase = PCC_VECBASE; sc->sc_pcc->pcc_abortirq = PCC_ABORT_IEN | PCC_ABORT_ACK; sc->sc_pcc->pcc_genctl |= PCC_GENCTL_IEN; /* XXX further init of PCC chip? */ config_search(pcc_scan, self, args); } /* * PCC interrupts land in a PCC_NVEC sized hole starting at PCC_VECBASE */ int pccintr_establish(vec, ih) int vec; struct intrhand *ih; { if (vec >= PCC_NVEC) { printf("pcc: illegal vector: 0x%x\n", vec); panic("pccintr_establish"); } return (intr_establish(PCC_VECBASE+vec, ih)); } int pccabort(frame) struct frame *frame; { #if 0 /* XXX wait for it to debounce -- there is something wrong here */ while (sys_pcc->pcc_abortirq & PCC_ABORT_ABS) ; delay(2); #endif sys_pcc->pcc_abortirq = PCC_ABORT_IEN | PCC_ABORT_ACK; nmihand(frame); return (1); } int pccspeed(pcc) struct pccreg *pcc; { volatile u_short lim = pcc_timer_us2lim(400); volatile u_short tmp; volatile int cnt; int speed; /*printf("counting...lim = %d\n", lim);*/ pcc->pcc_t1irq = 0; /* just in case */ pcc->pcc_t1pload = 0; pcc->pcc_t1ctl = PCC_TIMERCLEAR; pcc->pcc_t1ctl = PCC_TIMERSTART; cnt = 0; while (1) { tmp = pcc->pcc_t1count; if (tmp > lim) break; tmp = lim; cnt++; } pcc->pcc_t1ctl = PCC_TIMERCLEAR; printf("pccspeed cnt=%d\n", cnt); /* * Imperically determined. Unfortunately, because of various * memory board effects and such, it is rather unlikely that * we will find a nice formula. */ if (cnt > 230000) speed = 50; else if (cnt > 210000) speed = 33; else if (cnt > 190000) speed = 25; else if (cnt > 170000) /* 171163, 170335 */ speed = 20; else speed = 16; return (speed); }