/* $NetBSD: pci_kn300.c,v 1.9 1998/07/07 22:24:39 thorpej 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 1.9 1998/07/07 22:24:39 thorpej 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 #define NVEC (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) static char savunit[NVEC]; static char savirqs[NVEC]; extern struct mcpcia_softc *mcpcias; struct mcpcia_config *mcpcia_eisaccp = NULL; static struct alpha_shared_intr *kn300_pci_intr; #ifdef EVCNT_COUNTERS struct evcnt kn300_intr_evcnt; #endif static char * kn300_spurious __P((int)); 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; kn300_pci_intr = alpha_shared_intr_alloc(NVEC); for (g = 0; g < NVEC; g++) { alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); savunit[g] = (char) -1; savirqs[g] = (char) -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; /* Not supported on KN300. */ pc->pc_pciide_compat_intr_establish = NULL; #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 */ } #else #error "It will be impossible for you to have a console" #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..1 buspin-1 * bits 2..4 PCI Slot (0..7- yes, some don't exist) * bits 5..7 MID-4 * bits 8..10 7-GID * bits 11-15 IRQ */ *ihp = (pci_intr_handle_t) (buspin - 1 ) | ((device & 0x7) << 2) | ((ccp->cc_sc->mcpcia_mid - 4) << 5) | ((7 - ccp->cc_sc->mcpcia_gid) << 8) | (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 & 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; { void *cookie; int v; v = ih & 0x3ff; cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL, level, func, arg, "kn300 vector"); if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) { struct mcpcia_config *ccp = ccv; savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit; savirqs[v] = (ih >> 11) & 0x1f; kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); alpha_mb(); } return (cookie); } void dec_kn300_intr_disestablish(ccv, cookie) void *ccv, *cookie; { panic("dec_kn300_intr_disestablish not implemented"); } static char * kn300_spurious(ih) int ih; { static char str[48]; int pidx, slot, midx, gidx; pidx = ih & 0x3; slot = (ih >> 2) & 0x7; midx = (ih >> 5) & 0x7; gidx = (ih >> 8) & 0x7; sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq", gidx, midx + 4, slot, pidx + 'A'); return (str); } void kn300_iointr(framep, vec) void *framep; unsigned long vec; { struct mcpcia_softc *mcp; int v, gidx, midx; 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 } v = (int) vec - MCPCIA_VEC_PCI; midx = v / 0x200; gidx = midx / 4; midx = midx % 4; #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; } /* * Convert vector offset into a dense number. */ v /= 0x10; #ifndef EVCNT_COUNTERS if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) { intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++; } #endif if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) { return; } /* * Nobody fielded the interrupt? */ alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v)); if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, v) == 0) return; /* * Search for the controlling mcpcia. */ for (mcp = mcpcias; mcp != NULL; mcp = mcp->mcpcia_next) { if (mcp->mcpcia_dev.dv_unit == savunit[v]) { break; } } /* * And if found, disable this IRQ level. Guess what? * This may kill other things too. */ if (mcp) { kn300_disable_intr(&mcp->mcpcia_cc, savirqs[v]); } } 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(); }