/* $OpenBSD: pci_kn300.c,v 1.7 2015/07/26 05:09:44 miod Exp $ */ /* $NetBSD: pci_kn300.c,v 1.28 2005/12/11 12:16:17 christos 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sio.h" #if NSIO > 0 || NPCEB > 0 #include #endif int dec_kn300_intr_map(struct pci_attach_args *, pci_intr_handle_t *); const char *dec_kn300_intr_string(void *, pci_intr_handle_t); void *dec_kn300_intr_establish(void *, pci_intr_handle_t, int, int (*func)(void *), void *, const char *); void dec_kn300_intr_disestablish(void *, void *); #define KN300_PCEB_IRQ 16 #define NPIN 4 #define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) static int savirqs[NIRQ]; static struct alpha_shared_intr *kn300_pci_intr; static struct mcpcia_config *mcpcia_eisaccp = NULL; void kn300_iointr (void *, unsigned long); void kn300_enable_intr (struct mcpcia_config *, int); void kn300_disable_intr (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(NIRQ); for (g = 0; g < NIRQ; g++) { alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); savirqs[g] = (char) -1; } } 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 (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { mcpcia_eisaccp = ccp; #if NSIO > 0 || NPCEB > 0 sio_intr_setup(pc, &ccp->cc_iot); kn300_enable_intr(ccp, KN300_PCEB_IRQ); #endif } } int dec_kn300_intr_map(pa, ihp) struct pci_attach_args *pa; pci_intr_handle_t *ihp; { pcitag_t bustag = pa->pa_intrtag; int buspin = pa->pa_intrpin; pci_chipset_tag_t pc = pa->pa_pc; struct mcpcia_config *ccp = (struct mcpcia_config *)pc->pc_intr_v; int device; int mcpcia_irq; if (pa->pa_bridgetag) { buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin, pa->pa_device); if (pa->pa_bridgeih[buspin - 1] != 0) { *ihp = pa->pa_bridgeih[buspin - 1]; return 0; } return 1; } pci_decompose_tag(pc, bustag, NULL, &device, NULL); /* * On MID 5 device 1 is the internal NCR 53c810. */ if (ccp->cc_mid == 5 && device == 1) { mcpcia_irq = 16; } else if (device >= 2 && device <= 5) { mcpcia_irq = (device - 2) * 4 + buspin - 1; } else { printf("dec_kn300_intr_map: don't know how to setup %d/%d/%d\n", pa->pa_bus, pa->pa_device, pa->pa_function); return 1; } /* * handle layout: * * Determine kn300 IRQ (encoded in SCB vector): * 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 * * Software only: * bits 11-15 MCPCIA IRQ */ *ihp = (pci_intr_handle_t) (buspin - 1 ) | ((device & 0x7) << 2) | ((ccp->cc_mid - 4) << 5) | ((7 - ccp->cc_gid) << 8) | (mcpcia_irq << 11); return (0); } const char * dec_kn300_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { static char irqstr[64]; int irq; irq = ih & 0x3ff; if (irq >= NIRQ) panic("dec_kn300_intr_string: bogus kn300 IRQ 0x%x", irq); snprintf(irqstr, sizeof irqstr, "kn300 irq %d", irq); return (irqstr); } void * dec_kn300_intr_establish(ccv, ih, level, func, arg, name) void *ccv, *arg; pci_intr_handle_t ih; int level; int (*func) (void *); const char *name; { struct mcpcia_config *ccp = ccv; void *cookie; int irq; irq = ih & 0x3ff; if (irq >= NIRQ) panic("dec_kn300_intr_establish: bogus kn300 IRQ 0x%x", irq); cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, level, func, arg, "kn300 irq"); if (cookie != NULL && alpha_shared_intr_firstactive(kn300_pci_intr, irq)) { scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq), kn300_iointr, NULL); alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); savirqs[irq] = (ih >> 11) & 0x1f; kn300_enable_intr(ccp, savirqs[irq]); alpha_mb(); } return (cookie); } void dec_kn300_intr_disestablish(ccv, cookie) void *ccv, *cookie; { panic("dec_kn300_intr_disestablish not implemented"); } void kn300_iointr(arg, vec) void *arg; unsigned long vec; { struct mcpcia_softc *mcp; u_long irq; irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI); if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { /* * Any claim of an interrupt at this level is a hint to * reset the stray interrupt count- elsewise a slow leak * over time will cause this level to be shutdown. */ alpha_shared_intr_reset_strays(kn300_pci_intr, irq); return; } /* * If we haven't finished configuring yet, or there is no mcp * registered for this level yet, just return. */ mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); if (mcp == NULL || mcp->mcpcia_cc == NULL) return; /* * We're getting an interrupt for a device we haven't enabled. * We had better not try and use -1 to find the right bit to disable. */ if (savirqs[irq] == -1) { printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); return; } /* * Stray interrupt; disable the IRQ on the appropriate MCPCIA * if we've reached the limit. */ alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) return; kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); } void kn300_enable_intr(ccp, irq) struct mcpcia_config *ccp; int irq; { alpha_mb(); REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); alpha_mb(); } void kn300_disable_intr(ccp, irq) struct mcpcia_config *ccp; int irq; { alpha_mb(); REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); alpha_mb(); }