/* $NetBSD: pci_550.c,v 1.14 2000/03/19 02:25:29 thorpej Exp $ */ /*- * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center, and by Andrew Gallatin. * * 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 by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: pci_550.c,v 1.14 2000/03/19 02:25:29 thorpej Exp $"); #include #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_550_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *)); const char *dec_550_intr_string __P((void *, pci_intr_handle_t)); void *dec_550_intr_establish __P((void *, pci_intr_handle_t, int, int (*func)(void *), void *)); void dec_550_intr_disestablish __P((void *, void *)); void *dec_550_pciide_compat_intr_establish __P((void *, struct device *, struct pci_attach_args *, int, int (*)(void *), void *)); #define DEC_550_PCI_IRQ_BEGIN 8 #define DEC_550_MAX_IRQ (64 - DEC_550_PCI_IRQ_BEGIN) /* * The Miata has a Pyxis, which seems to have problems with stray * interrupts. Work around this by just ignoring strays. */ #define PCI_STRAY_MAX 0 /* * Some Miata models, notably models with a Cypress PCI-ISA bridge, have * a PCI device (the OHCI USB controller) with interrupts tied to ISA IRQ * lines. This IRQ is encoded as: * * line = 0xe0 | isa_irq; */ #define DEC_550_LINE_IS_ISA(line) ((line) >= 0xe0 && (line) <= 0xef) #define DEC_550_LINE_ISA_IRQ(line) ((line) & 0x0f) struct alpha_shared_intr *dec_550_pci_intr; #ifdef EVCNT_COUNTERS struct evcnt dec_550_intr_evcnt; #endif void dec_550_iointr __P((void *framep, unsigned long vec)); void dec_550_intr_enable __P((int irq)); void dec_550_intr_disable __P((int irq)); void pci_550_pickintr(ccp) struct cia_config *ccp; { bus_space_tag_t iot = &ccp->cc_iot; pci_chipset_tag_t pc = &ccp->cc_pc; int i; pc->pc_intr_v = ccp; pc->pc_intr_map = dec_550_intr_map; pc->pc_intr_string = dec_550_intr_string; pc->pc_intr_establish = dec_550_intr_establish; pc->pc_intr_disestablish = dec_550_intr_disestablish; pc->pc_pciide_compat_intr_establish = dec_550_pciide_compat_intr_establish; /* * DEC 550's interrupts are enabled via the Pyxis interrupt * mask register. Nothing to map. */ for (i = 0; i < DEC_550_MAX_IRQ; i++) dec_550_intr_disable(i); dec_550_pci_intr = alpha_shared_intr_alloc(DEC_550_MAX_IRQ); for (i = 0; i < DEC_550_MAX_IRQ; i++) { alpha_shared_intr_set_maxstrays(dec_550_pci_intr, i, PCI_STRAY_MAX); alpha_shared_intr_set_private(dec_550_pci_intr, i, ccp); } #if NSIO sio_intr_setup(pc, iot); #endif set_iointr(dec_550_iointr); } int dec_550_intr_map(ccv, bustag, buspin, line, ihp) void *ccv; pcitag_t bustag; int buspin, line; pci_intr_handle_t *ihp; { struct cia_config *ccp = ccv; pci_chipset_tag_t pc = &ccp->cc_pc; int bus, device, function; if (buspin == 0) { /* No IRQ used. */ return 1; } if (buspin > 4) { printf("dec_550_intr_map: bad interrupt pin %d\n", buspin); return 1; } alpha_pci_decompose_tag(pc, bustag, &bus, &device, &function); /* * There are two main variants of Miata: Miata 1 (Intel SIO) * and Miata {1.5,2} (Cypress). * * The Miata 1 has a CMD PCI IDE wired to compatibility mode at * device 4 of bus 0. This variant apparently also has the * Pyxis DMA bug. * * On the Miata 1.5 and Miata 2, the Cypress PCI-ISA bridge lives * on device 7 of bus 0. This device has PCI IDE wired to * compatibility mode on functions 1 and 2. * * There will be no interrupt mapping for these devices, so just * bail out now. */ if (bus == 0) { if ((hwrpb->rpb_variation & SV_ST_MASK) < SV_ST_MIATA_1_5) { /* Miata 1 */ if (device == 7) panic("dec_550_intr_map: SIO device"); else if (device == 4) return (1); } else { /* Miata 1.5 or Miata 2 */ if (device == 7) { if (function == 0) panic("dec_550_intr_map: SIO device"); if (function == 1 || function == 2) return (1); } } } /* * The console places the interrupt mapping in the "line" value. * A value of (char)-1 indicates there is no mapping. */ if (line == 0xff) { printf("dec_550_intr_map: no mapping for %d/%d/%d\n", bus, device, function); return (1); } #if NSIO == 0 if (DEC_550_LINE_IS_ISA(line)) { printf("dec_550_intr_map: ISA IRQ %d for %d/%d/%d\n", DEC_550_LINE_ISA_IRQ(line), bus, device, function); return (1); } #endif if (DEC_550_LINE_IS_ISA(line) == 0 && line >= DEC_550_MAX_IRQ) panic("dec_550_intr_map: dec 550 irq too large (%d)\n", line); *ihp = line; return (0); } const char * dec_550_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { #if 0 struct cia_config *ccp = ccv; #endif static char irqstr[16]; /* 12 + 2 + NULL + sanity */ #if NSIO if (DEC_550_LINE_IS_ISA(ih)) return (sio_intr_string(NULL /*XXX*/, DEC_550_LINE_ISA_IRQ(ih))); #endif if (ih >= DEC_550_MAX_IRQ) panic("dec_550_intr_string: bogus 550 IRQ 0x%lx\n", ih); sprintf(irqstr, "dec 550 irq %ld", ih); return (irqstr); } void * dec_550_intr_establish(ccv, ih, level, func, arg) void *ccv, *arg; pci_intr_handle_t ih; int level; int (*func) __P((void *)); { #if 0 struct cia_config *ccp = ccv; #endif void *cookie; #if NSIO if (DEC_550_LINE_IS_ISA(ih)) return (sio_intr_establish(NULL /*XXX*/, DEC_550_LINE_ISA_IRQ(ih), IST_LEVEL, level, func, arg)); #endif if (ih >= DEC_550_MAX_IRQ) panic("dec_550_intr_establish: bogus dec 550 IRQ 0x%lx\n", ih); cookie = alpha_shared_intr_establish(dec_550_pci_intr, ih, IST_LEVEL, level, func, arg, "dec 550 irq"); if (cookie != NULL && alpha_shared_intr_isactive(dec_550_pci_intr, ih)) dec_550_intr_enable(ih); return (cookie); } void dec_550_intr_disestablish(ccv, cookie) void *ccv, *cookie; { struct cia_config *ccp = ccv; struct alpha_shared_intrhand *ih = cookie; unsigned int irq = ih->ih_num; int s; #if NSIO /* * We have to determine if this is an ISA IRQ or not! We do this * by checking to see if the intrhand points back to an intrhead * that points to our cia_config. If not, it's an ISA IRQ. Pretty * disgusting, eh? */ if (ih->ih_intrhead->intr_private != ccp) { sio_intr_disestablish(NULL /*XXX*/, cookie); return; } #endif s = splhigh(); alpha_shared_intr_disestablish(dec_550_pci_intr, cookie, "dec 550 irq"); if (alpha_shared_intr_isactive(dec_550_pci_intr, irq) == 0) { dec_550_intr_disable(irq); alpha_shared_intr_set_dfltsharetype(dec_550_pci_intr, irq, IST_NONE); } splx(s); } void * dec_550_pciide_compat_intr_establish(v, dev, pa, chan, func, arg) void *v; struct device *dev; struct pci_attach_args *pa; int chan; int (*func) __P((void *)); void *arg; { pci_chipset_tag_t pc = pa->pa_pc; void *cookie = NULL; int bus, irq; alpha_pci_decompose_tag(pc, pa->pa_tag, &bus, NULL, NULL); /* * If this isn't PCI bus #0, all bets are off. */ if (bus != 0) return (NULL); irq = PCIIDE_COMPAT_IRQ(chan); #if NSIO cookie = sio_intr_establish(NULL /*XXX*/, irq, IST_EDGE, IPL_BIO, func, arg); #endif return (cookie); } void dec_550_iointr(framep, vec) void *framep; unsigned long vec; { int irq; if (vec >= 0x900) { irq = ((vec - 0x900) >> 4); if (irq >= DEC_550_MAX_IRQ) panic("550_iointr: vec 0x%lx out of range\n", vec); #ifdef EVCNT_COUNTERS dec_550_intr_evcnt.ev_count++; #else if (DEC_550_MAX_IRQ != INTRCNT_DEC_550_IRQ_LEN) panic("dec_550 interrupt counter sizes inconsistent"); intrcnt[INTRCNT_DEC_550_IRQ + irq]++; #endif if (!alpha_shared_intr_dispatch(dec_550_pci_intr, irq)) { alpha_shared_intr_stray(dec_550_pci_intr, irq, "dec 550 irq"); if (ALPHA_SHARED_INTR_DISABLE(dec_550_pci_intr, irq)) dec_550_intr_disable(irq); } return; } #if NSIO if (vec >= 0x800) { sio_iointr(framep, vec); return; } #endif panic("dec_550_iointr: weird vec 0x%lx\n", vec); } void dec_550_intr_enable(irq) int irq; { cia_pyxis_intr_enable(irq + DEC_550_PCI_IRQ_BEGIN, 1); } void dec_550_intr_disable(irq) int irq; { cia_pyxis_intr_enable(irq + DEC_550_PCI_IRQ_BEGIN, 0); }