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      1 /* $NetBSD: pci_up1000.c,v 1.17 2021/06/19 16:59:07 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     33 
     34 __KERNEL_RCSID(0, "$NetBSD: pci_up1000.c,v 1.17 2021/06/19 16:59:07 thorpej Exp $");
     35 
     36 #include <sys/types.h>
     37 #include <sys/param.h>
     38 #include <sys/time.h>
     39 #include <sys/systm.h>
     40 #include <sys/errno.h>
     41 #include <sys/device.h>
     42 
     43 #include <machine/autoconf.h>
     44 #include <machine/rpb.h>
     45 #include <sys/bus.h>
     46 #include <machine/intr.h>
     47 
     48 #include <dev/isa/isavar.h>
     49 
     50 #include <dev/pci/pcireg.h>
     51 #include <dev/pci/pcivar.h>
     52 #include <dev/pci/pciidereg.h>
     53 #include <dev/pci/pciidevar.h>
     54 
     55 #include <alpha/pci/irongatevar.h>
     56 
     57 #include <alpha/pci/siovar.h>
     58 #include <alpha/pci/sioreg.h>
     59 
     60 #include "sio.h"
     61 
     62 static int	api_up1000_intr_map(const struct pci_attach_args *,
     63 		    pci_intr_handle_t *);
     64 
     65 static void
     66 pci_up1000_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt,
     67     pci_chipset_tag_t pc)
     68 {
     69 #if NSIO
     70 	pc->pc_intr_v = core;
     71 	pc->pc_intr_map = api_up1000_intr_map;
     72 	pc->pc_intr_string = sio_pci_intr_string;
     73 	pc->pc_intr_evcnt = sio_pci_intr_evcnt;
     74 	pc->pc_intr_establish = sio_pci_intr_establish;
     75 	pc->pc_intr_disestablish = sio_pci_intr_disestablish;
     76 
     77 	pc->pc_pciide_compat_intr_establish =
     78 	    sio_pciide_compat_intr_establish;
     79 
     80 	sio_intr_setup(pc, iot);
     81 #else
     82 	panic("pci_up1000_pickintr: no I/O interrupt handler (no sio)");
     83 #endif
     84 }
     85 ALPHA_PCI_INTR_INIT(ST_API_NAUTILUS, pci_up1000_pickintr)
     86 
     87 static int
     88 api_up1000_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
     89 {
     90 	pci_chipset_tag_t pc = pa->pa_pc;
     91 	int buspin = pa->pa_intrpin;
     92 	int bustag = pa->pa_intrtag;
     93 	int line = pa->pa_intrline;
     94 	int bus, device, function;
     95 
     96 	if (buspin == 0) {
     97 		/* No IRQ used. */
     98 		return 1;
     99 	}
    100 	if (buspin < 0 || buspin > 4) {
    101 		printf("%s: bad interrupt pin %d\n", __func__, buspin);
    102 		return 1;
    103 	}
    104 
    105 	pci_decompose_tag(pc, bustag, &bus, &device, &function);
    106 
    107 	/*
    108 	 * The console places the interrupt mapping in the "line" value.
    109 	 * A value of (char)-1 indicates there is no mapping.
    110 	 */
    111 	if (line == 0xff) {
    112 		printf("%s: no mapping for %d/%d/%d\n", __func__,
    113 		    bus, device, function);
    114 		return (1);
    115 	}
    116 
    117 	if (line < 0 || line > 15) {
    118 		printf("%s: bad ISA IRQ (%d)\n", __func__, line);
    119 		return (1);
    120 	}
    121 	if (line == 2) {
    122 		printf("%s: changed IRQ 2 to IRQ 9\n", __func__);
    123 		line = 9;
    124 	}
    125 
    126 	alpha_pci_intr_handle_init(ihp, line, 0);
    127 	return (0);
    128 }
    129