/* $NetBSD: pci_kn300.c,v 1.2 1998/04/15 01:18:17 mjacob Exp $ */ /* * Copyright (c) 1998 by Matthew Jacob * NASA AMES Research Center. * 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 immediately at the beginning of the file, without modification, * 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. 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 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 AUTHOR 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 /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.2 1998/04/15 01:18:17 mjacob Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef EVCNT_COUNTERS #include #endif #include "sio.h" #if NSIO #include #endif int dec_kn300_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *)); const char *dec_kn300_intr_string __P((void *, pci_intr_handle_t)); void * dec_kn300_intr_establish __P((void *, pci_intr_handle_t, int, int (*func)(void *), void *)); void dec_kn300_intr_disestablish __P((void *, void *)); #define KN300_PCEB_IRQ 16 #define NPIN 4 static struct vectab { int (*func) __P((void *)); void *arg; int irq; } vectab[MAX_MC_BUS][MCPCIA_PER_MCBUS][MCPCIA_MAXSLOT][NPIN]; struct mcpcia_config *mcpcia_eisaccp = NULL; #ifdef EVCNT_COUNTERS struct evcnt kn300_intr_evcnt; #endif int kn300_spurious __P((void *)); void kn300_iointr __P((void *, unsigned long)); void kn300_enable_intr __P((struct mcpcia_config *, int)); void kn300_disable_intr __P((struct mcpcia_config *, int)); void pci_kn300_pickintr(ccp, first) struct mcpcia_config *ccp; int first; { pci_chipset_tag_t pc = &ccp->cc_pc; if (first) { int g; for (g = 0; g < MAX_MC_BUS; g++) { int m; for (m = 0; m < MCPCIA_PER_MCBUS; m++) { int s; for (s = 0; s < MCPCIA_MAXSLOT; s++) { int p; for (p = 0; p < NPIN; p++) { struct vectab *vp; vp = &vectab[g][m][s][p]; vp->func = kn300_spurious; vp->arg = (void *) ((long) (g << 0) | (m << 3) | (s << 6) | (p << 9)); vp->irq = -1; } } } } set_iointr(kn300_iointr); } pc->pc_intr_v = ccp; pc->pc_intr_map = dec_kn300_intr_map; pc->pc_intr_string = dec_kn300_intr_string; pc->pc_intr_establish = dec_kn300_intr_establish; pc->pc_intr_disestablish = dec_kn300_intr_disestablish; #if NSIO if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { extern void dec_kn300_cons_init __P((void)); bus_space_tag_t iot = &ccp->cc_iot; if (mcpcia_eisaccp) { printf("Huh? There's only supposed to be one eisa!\n"); } sio_intr_setup(pc, iot); kn300_enable_intr(ccp, KN300_PCEB_IRQ); mcpcia_eisaccp = ccp; dec_kn300_cons_init(); /* XXXXXXXXXXXXXXXXXXX */ } #endif } int dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) void *ccv; pcitag_t bustag; int buspin, line; pci_intr_handle_t *ihp; { struct mcpcia_config *ccp = ccv; pci_chipset_tag_t pc = &ccp->cc_pc; int device; int kn300_irq; if (buspin == 0) { /* No IRQ used. */ return 1; } if (buspin > 4 || buspin < 0) { printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); return 1; } alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); if (device == 1) { /* * This can only be the NCR810 SCSI. * XXX: Do we need to check this more closely? */ if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { printf("XXXXX: How can you have an EISA in the spot " "as an NCR 810?\n"); } kn300_irq = 16; } else if (device >= 2 && device <= 5) { kn300_irq = (device - 2) * 4; } else { printf("dec_kn300_intr_map: weird device number %d\n", device); return(1); } /* * handle layout: * * bits 0..2 7-GID * bits 3..5 MID-4 * bits 6..8 PCI Slot (0..7- yes, some don't exist) * bits 9..10 buspin-1 * bits 11-15 IRQ */ *ihp = (pci_intr_handle_t) (7 - ccp->cc_sc->mcpcia_gid) | ((ccp->cc_sc->mcpcia_mid - 4) << 3) | (device << 6) | ((buspin-1) << 9) | (kn300_irq << 11); return (0); } const char * dec_kn300_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { static char irqstr[64]; sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c", (ih >> 11) & 0x1f, ((ih >> 9) & 0x3) + 'A'); return (irqstr); } void * dec_kn300_intr_establish(ccv, ih, level, func, arg) void *ccv; pci_intr_handle_t ih; int level; int (*func) __P((void *)); void *arg; { struct vectab *vp; int gidx, midx, slot, pidx, s; void *cookie = NULL; gidx = ih & 0x7; midx = (ih >> 3) & 0x7; slot = (ih >> 6) & 0x7; pidx = (ih >> 9) & 0x3; /* * XXX: FIXME - for PCI bridges, the framework here is such that * XXX: we're mapping the mapping for the bridge, not the * XXX: device behind the bridge, so we're not cognizant of the * XXX: pin swizzling that could go on. We really ought to fix * XXX: this, but for a first cut, assuming all pins map to the * XXX: same device and filling in all pin vectors is probably * XXX: okay. */ for (pidx = 0; pidx < 4; pidx++) { vp = &vectab[gidx][midx][slot][pidx]; if (vp->func != kn300_spurious) { printf("dec_kn300_intr_establish: vector cookie 0x%x " "already used\n", ih); return (cookie); } s = splhigh(); vp->func = func; vp->arg = arg; vp->irq = (ih >> 11) & 0x1f; (void) splx(s); } kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); cookie = (void *) ih; return (cookie); } void dec_kn300_intr_disestablish(ccv, cookie) void *ccv, *cookie; { pci_intr_handle_t ih = (pci_intr_handle_t) cookie; int gidx, midx, slot, pidx, s; struct vectab *vp; gidx = ih & 0x7; midx = (ih >> 3) & 0x7; slot = (ih >> 6) & 0x7; pidx = (ih >> 9) & 0x3; vp = &vectab[gidx][midx][slot][pidx]; s = splhigh(); vp->func = kn300_spurious; vp->arg = cookie; vp->irq = -1; (void) splx(s); kn300_disable_intr(ccv, (int)((ih >> 11) & 0x1f)); } int kn300_spurious(arg) void *arg; { pci_intr_handle_t ih = (pci_intr_handle_t) arg; int gidx, midx, slot, pidx; gidx = ih & 0x7; midx = (ih >> 3) & 0x7; slot = (ih >> 6) & 0x7; pidx = (ih >> 9) & 0x3; printf("Spurious Interrupt from mcbus%d MID %d Slot %d " "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); /* * XXX: We *could*, if we have recorded all the mcpcia softcs * XXX: that we've configured, and this spurious interrupt * XXX: falls within this range, disable this interrupt. * * XXX: Later. */ return (-1); } void kn300_iointr(framep, vec) void *framep; unsigned long vec; { int base, gidx, midx, slot, pidx; struct vectab *vp; if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { #if NSIO sio_iointr(framep, vec); return; #else printf("kn300_iointr: (E)ISA interrupt support not configured" " for vector 0x%x", vec); kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); #endif } base = (int) vec - MCPCIA_VEC_PCI; midx = base / 0x200; gidx = midx / 4; midx = midx % 4; slot = (base % 0x200) / 0x10; pidx = ((slot / 4) & 0x3); slot = slot / 4; if (gidx >= MAX_MC_BUS || midx >= MCPCIA_PER_MCBUS || slot >= MCPCIA_MAXSLOT || pidx >= NPIN) { panic("kn300_iointr: vec 0x%x (mcbus%d mid%d slot %d pin%d)", vec, gidx, midx+4, slot, pidx); } #ifdef EVCNT_COUNTERS kn300_intr_evcnt.ev_count++; #endif /* * Check for i2c bus interrupts XXXXXXXXX */ if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { #ifndef EVCNT_COUNTERS intrcnt[INTRCNT_KN300_I2C_CTRL]++; #endif printf("i2c: controller interrupt\n"); return; } if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { #ifndef EVCNT_COUNTERS intrcnt[INTRCNT_KN300_I2C_BUS]++; #endif printf("i2c: bus interrupt\n"); return; } /* * Now, for the main stuff... */ vp = &vectab[gidx][midx][slot][pidx]; #ifndef EVCNT_COUNTERS if (vp->irq >= 0 && vp->irq <= INTRCNT_KN300_NCR810) { intrcnt[INTRCNT_KN300_IRQ + vp->irq]++; } #endif if ((*vp->func)(vp->arg) == 0) { #if 0 printf("Unclaimed interrupt from mcbus%d MID %d Slot %d " "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); #endif } } void kn300_enable_intr(ccp, irq) struct mcpcia_config *ccp; int irq; { alpha_mb(); REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq); alpha_mb(); } void kn300_disable_intr(ccp, irq) struct mcpcia_config *ccp; int irq; { alpha_mb(); REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq); alpha_mb(); }