313 lines
7.8 KiB
C
313 lines
7.8 KiB
C
/* $NetBSD: pci_kn300.c,v 1.12 1999/04/16 21:29:47 thorpej Exp $ */
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/*
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* Copyright (c) 1998 by Matthew Jacob
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* NASA AMES Research Center.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.12 1999/04/16 21:29:47 thorpej Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/syslog.h>
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#include <vm/vm.h>
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#include <machine/autoconf.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <alpha/mcbus/mcbusvar.h>
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#include <alpha/mcbus/mcbusreg.h>
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#include <alpha/pci/mcpciareg.h>
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#include <alpha/pci/mcpciavar.h>
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#include <alpha/pci/pci_kn300.h>
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#ifndef EVCNT_COUNTERS
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#include <machine/intrcnt.h>
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#endif
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#include "sio.h"
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#if NSIO > 0
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#include <alpha/pci/siovar.h>
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#endif
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int dec_kn300_intr_map __P((void *, pcitag_t, int, int,
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pci_intr_handle_t *));
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const char *dec_kn300_intr_string __P((void *, pci_intr_handle_t));
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void *dec_kn300_intr_establish __P((void *, pci_intr_handle_t,
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int, int (*func)(void *), void *));
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void dec_kn300_intr_disestablish __P((void *, void *));
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#define KN300_PCEB_IRQ 16
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#define NPIN 4
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#define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN)
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static int savunit[NIRQ];
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static int savirqs[NIRQ];
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static struct alpha_shared_intr *kn300_pci_intr;
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#ifdef EVCNT_COUNTERS
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struct evcnt kn300_intr_evcnt;
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#endif
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void kn300_iointr __P((void *, unsigned long));
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void kn300_enable_intr __P((struct mcpcia_config *, int));
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void kn300_disable_intr __P((struct mcpcia_config *, int));
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void
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pci_kn300_pickintr(ccp, first)
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struct mcpcia_config *ccp;
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int first;
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{
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pci_chipset_tag_t pc = &ccp->cc_pc;
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if (first) {
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int g;
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kn300_pci_intr = alpha_shared_intr_alloc(NIRQ);
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for (g = 0; g < NIRQ; g++) {
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alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25);
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savunit[g] = (char) -1;
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savirqs[g] = (char) -1;
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}
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set_iointr(kn300_iointr);
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}
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pc->pc_intr_v = ccp;
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pc->pc_intr_map = dec_kn300_intr_map;
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pc->pc_intr_string = dec_kn300_intr_string;
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pc->pc_intr_establish = dec_kn300_intr_establish;
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pc->pc_intr_disestablish = dec_kn300_intr_disestablish;
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/* Not supported on KN300. */
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pc->pc_pciide_compat_intr_establish = NULL;
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#if NSIO > 0
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if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) {
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sio_intr_setup(pc, &ccp->cc_iot);
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kn300_enable_intr(ccp, KN300_PCEB_IRQ);
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}
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#endif
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}
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int
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dec_kn300_intr_map(ccv, bustag, buspin, line, ihp)
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void *ccv;
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pcitag_t bustag;
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int buspin, line;
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pci_intr_handle_t *ihp;
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{
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struct mcpcia_config *ccp = ccv;
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pci_chipset_tag_t pc = &ccp->cc_pc;
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int device;
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int mcpcia_irq;
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if (buspin == 0) {
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/* No IRQ used. */
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return 1;
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}
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if (buspin > 4 || buspin < 0) {
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printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin);
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return 1;
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}
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alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL);
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/*
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* On MID 5 device 1 is the internal NCR 53c810.
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*/
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if (ccp->cc_mid == 5 && device == 1) {
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mcpcia_irq = 16;
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} else if (device >= 2 && device <= 5) {
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mcpcia_irq = (device - 2) * 4;
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} else {
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printf("dec_kn300_intr_map: weird device number %d\n", device);
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return(1);
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}
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/*
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* handle layout:
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*
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* Determine kn300 IRQ:
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* bits 0..1 buspin-1
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* bits 2..4 PCI Slot (0..7- yes, some don't exist)
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* bits 5..7 MID-4
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* bits 8..10 7-GID
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*
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* Software only:
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* bits 11-15 MCPCIA IRQ
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*/
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*ihp = (pci_intr_handle_t)
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(buspin - 1 ) |
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((device & 0x7) << 2) |
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((ccp->cc_mid - 4) << 5) |
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((7 - ccp->cc_gid) << 8) |
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(mcpcia_irq << 11);
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return (0);
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}
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const char *
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dec_kn300_intr_string(ccv, ih)
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void *ccv;
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pci_intr_handle_t ih;
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{
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static char irqstr[64];
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sprintf(irqstr, "kn300 irq %ld", ih & 0x3ff);
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return (irqstr);
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}
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void *
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dec_kn300_intr_establish(ccv, ih, level, func, arg)
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void *ccv;
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pci_intr_handle_t ih;
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int level;
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int (*func) __P((void *));
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void *arg;
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{
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void *cookie;
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int irq;
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irq = ih & 0x3ff;
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cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL,
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level, func, arg, "kn300 irq");
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if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, irq)) {
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struct mcpcia_config *ccp = ccv;
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savunit[irq] = ccp->cc_sc->mcpcia_dev.dv_unit;
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savirqs[irq] = (ih >> 11) & 0x1f;
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kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f));
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alpha_mb();
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}
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return (cookie);
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}
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void
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dec_kn300_intr_disestablish(ccv, cookie)
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void *ccv, *cookie;
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{
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panic("dec_kn300_intr_disestablish not implemented");
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}
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void
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kn300_iointr(framep, vec)
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void *framep;
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unsigned long vec;
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{
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struct mcpcia_softc *mcp;
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u_long irq;
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extern struct cfdriver mcpcia_cd;
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if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) {
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#if NSIO > 0
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sio_iointr(framep, vec);
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return;
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#else
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printf("kn300_iointr: (E)ISA interrupt support not configured"
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" for vector 0x%x", vec);
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kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ);
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#endif
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}
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#ifdef EVCNT_COUNTERS
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kn300_intr_evcnt.ev_count++;
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#endif
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irq = (vec - MCPCIA_VEC_PCI) >> 4;
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/*
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* Check for I2C interrupts. These are technically within
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* the PCI vector range, but no PCI device should ever map
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* to them.
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*/
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if (vec == MCPCIA_I2C_CVEC) {
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#ifndef EVCNT_COUNTERS
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intrcnt[INTRCNT_KN300_I2C_CTRL]++;
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#endif
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printf("i2c: controller interrupt\n");
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return;
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}
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if (vec == MCPCIA_I2C_BVEC) {
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#ifndef EVCNT_COUNTERS
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intrcnt[INTRCNT_KN300_I2C_BUS]++;
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#endif
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printf("i2c: bus interrupt\n");
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return;
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}
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#ifndef EVCNT_COUNTERS
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if (savirqs[irq] >= 0 && savirqs[irq] <= INTRCNT_KN300_NCR810) {
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intrcnt[INTRCNT_KN300_IRQ + savirqs[irq]]++;
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}
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#endif
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if (alpha_shared_intr_dispatch(kn300_pci_intr, irq))
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return;
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/*
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* Stray interrupt; disable the IRQ on the appropriate MCPCIA
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* if we've reached the limit.
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*/
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alpha_shared_intr_stray(kn300_pci_intr, savirqs[irq], "kn300 irq");
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if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0)
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return;
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mcp = mcpcia_cd.cd_devs[savunit[irq]];
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kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]);
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}
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void
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kn300_enable_intr(ccp, irq)
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struct mcpcia_config *ccp;
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int irq;
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{
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alpha_mb();
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REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq);
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alpha_mb();
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}
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void
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kn300_disable_intr(ccp, irq)
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struct mcpcia_config *ccp;
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int irq;
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{
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alpha_mb();
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REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq);
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alpha_mb();
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}
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