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      1 /* $NetBSD: pci_2100_a50.c,v 1.44 2021/06/25 13:41:33 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     31 
     32 __KERNEL_RCSID(0, "$NetBSD: pci_2100_a50.c,v 1.44 2021/06/25 13:41:33 thorpej Exp $");
     33 
     34 #include <sys/types.h>
     35 #include <sys/param.h>
     36 #include <sys/time.h>
     37 #include <sys/systm.h>
     38 #include <sys/errno.h>
     39 #include <sys/device.h>
     40 
     41 #include <machine/autoconf.h>
     42 #include <machine/rpb.h>
     43 #include <sys/bus.h>
     44 #include <machine/intr.h>
     45 
     46 #include <dev/isa/isavar.h>
     47 #include <dev/pci/pcireg.h>
     48 #include <dev/pci/pcivar.h>
     49 
     50 #include <alpha/pci/apecsvar.h>
     51 
     52 #include <alpha/pci/siovar.h>
     53 #include <alpha/pci/sioreg.h>
     54 
     55 #include "sio.h"
     56 
     57 static int	dec_2100_a50_intr_map(const struct pci_attach_args *,
     58 		    pci_intr_handle_t *);
     59 
     60 static void
     61 pci_2100_a50_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt,
     62     pci_chipset_tag_t pc)
     63 {
     64 
     65 	pc->pc_intr_v = core;
     66 	pc->pc_intr_map = dec_2100_a50_intr_map;
     67 	pc->pc_intr_string = sio_pci_intr_string;
     68 	pc->pc_intr_evcnt = sio_pci_intr_evcnt;
     69 	pc->pc_intr_establish = sio_pci_intr_establish;
     70 	pc->pc_intr_disestablish = sio_pci_intr_disestablish;
     71 
     72 	/* Not supported on 2100 A50. */
     73 	pc->pc_pciide_compat_intr_establish = NULL;
     74 
     75 #if NSIO
     76 	sio_intr_setup(pc, iot);
     77 #else
     78 	panic("pci_2100_a50_pickintr: no I/O interrupt handler (no sio)");
     79 #endif
     80 }
     81 ALPHA_PCI_INTR_INIT(ST_DEC_2100_A50, pci_2100_a50_pickintr)
     82 
     83 int
     84 dec_2100_a50_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
     85 {
     86 	pcitag_t bustag = pa->pa_intrtag;
     87 	int buspin = pa->pa_intrpin;
     88 	pci_chipset_tag_t pc = pa->pa_pc;
     89 	int device, pirq;
     90 
     91 #ifndef DIAGNOSTIC
     92 	pirq = 0;				/* XXX gcc -Wuninitialized */
     93 #endif
     94 
     95 	if (buspin == 0) {
     96 		/* No IRQ used. */
     97 		return 1;
     98 	}
     99 	if (buspin < 0 || buspin > 4) {
    100 		printf("dec_2100_a50_intr_map: bad interrupt pin %d\n",
    101 		    buspin);
    102 		return 1;
    103 	}
    104 
    105 	pci_decompose_tag(pc, bustag, NULL, &device, NULL);
    106 
    107 	switch (device) {
    108 	case 6:					/* NCR SCSI */
    109 		pirq = 3;
    110 		break;
    111 
    112 	case 11:				/* slot 1 */
    113 	case 14:				/* slot 3 */
    114 		switch (buspin) {
    115 		case PCI_INTERRUPT_PIN_A:
    116 		case PCI_INTERRUPT_PIN_D:
    117 			pirq = 0;
    118 			break;
    119 		case PCI_INTERRUPT_PIN_B:
    120 			pirq = 2;
    121 			break;
    122 		case PCI_INTERRUPT_PIN_C:
    123 			pirq = 1;
    124 			break;
    125 #ifdef DIAGNOSTIC
    126 		default:			/* XXX gcc -Wuninitialized */
    127 			panic("dec_2100_a50_intr_map bogus PCI pin %d",
    128 			    buspin);
    129 #endif
    130 		};
    131 		break;
    132 
    133 	case 12:				/* slot 2 */
    134 		switch (buspin) {
    135 		case PCI_INTERRUPT_PIN_A:
    136 		case PCI_INTERRUPT_PIN_D:
    137 			pirq = 1;
    138 			break;
    139 		case PCI_INTERRUPT_PIN_B:
    140 			pirq = 0;
    141 			break;
    142 		case PCI_INTERRUPT_PIN_C:
    143 			pirq = 2;
    144 			break;
    145 #ifdef DIAGNOSTIC
    146 		default:			/* XXX gcc -Wuninitialized */
    147 			panic("dec_2100_a50_intr_map bogus PCI pin %d",
    148 			    buspin);
    149 #endif
    150 		};
    151 		break;
    152 
    153 	case 13:				/* slot 3 */
    154 		switch (buspin) {
    155 		case PCI_INTERRUPT_PIN_A:
    156 		case PCI_INTERRUPT_PIN_D:
    157 			pirq = 2;
    158 			break;
    159 		case PCI_INTERRUPT_PIN_B:
    160 			pirq = 1;
    161 			break;
    162 		case PCI_INTERRUPT_PIN_C:
    163 			pirq = 0;
    164 			break;
    165 #ifdef DIAGNOSTIC
    166 		default:			/* XXX gcc -Wuninitialized */
    167 			panic("dec_2100_a50_intr_map bogus PCI pin %d",
    168 			    buspin);
    169 #endif
    170 		};
    171 		break;
    172 
    173 	default:
    174 	        printf("dec_2100_a50_intr_map: weird device number %d\n",
    175 		    device);
    176 	        return 1;
    177 	}
    178 
    179 #if 0
    180 	printf("pci_2100_a50_intr_map: device %d pin %c: pirq %d\n",
    181 		device, '@' + buspin, pirq);
    182 #endif
    183 
    184 	return sio_pirq_intr_map(pc, pirq, ihp);
    185 }
    186