1/* $NetBSD: pci_axppci_33.c,v 1.41 2021/06/25 13:41:33 thorpej Exp $ */
2
3/*
4 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Authors: Jeffrey Hsu and 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@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_axppci_33.c,v 1.41 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/lcavar.h>
51
52#include <alpha/pci/siovar.h>
53#include <alpha/pci/sioreg.h>
54
55#include "sio.h"
56
57static int	dec_axppci_33_intr_map(const struct pci_attach_args *,
58		    pci_intr_handle_t *);
59
60static void
61pci_axppci_33_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_axppci_33_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 AXPpci33. */
73	pc->pc_pciide_compat_intr_establish = NULL;
74
75#if NSIO
76	sio_intr_setup(pc, iot);
77#else
78	panic("pci_axppci_33_pickintr: no I/O interrupt handler (no sio)");
79#endif
80}
81ALPHA_PCI_INTR_INIT(ST_DEC_AXPPCI_33, pci_axppci_33_pickintr)
82
83int
84dec_axppci_33_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_axppci_33_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		switch (buspin) {
114		case PCI_INTERRUPT_PIN_A:
115		case PCI_INTERRUPT_PIN_D:
116			pirq = 0;
117			break;
118		case PCI_INTERRUPT_PIN_B:
119			pirq = 2;
120			break;
121		case PCI_INTERRUPT_PIN_C:
122			pirq = 1;
123			break;
124#ifdef DIAGNOSTIC
125		default:			/* XXX gcc -Wuninitialized */
126			panic("dec_axppci_33_intr_map: bogus PCI pin %d",
127			    buspin);
128#endif
129		};
130		break;
131
132	case 12:				/* slot 2 */
133		switch (buspin) {
134		case PCI_INTERRUPT_PIN_A:
135		case PCI_INTERRUPT_PIN_D:
136			pirq = 1;
137			break;
138		case PCI_INTERRUPT_PIN_B:
139			pirq = 0;
140			break;
141		case PCI_INTERRUPT_PIN_C:
142			pirq = 2;
143			break;
144#ifdef DIAGNOSTIC
145		default:			/* XXX gcc -Wuninitialized */
146			panic("dec_axppci_33_intr_map: bogus PCI pin %d",
147			    buspin);
148#endif
149		};
150		break;
151
152	case 8:				/* slot 3 */
153		switch (buspin) {
154		case PCI_INTERRUPT_PIN_A:
155		case PCI_INTERRUPT_PIN_D:
156			pirq = 2;
157			break;
158		case PCI_INTERRUPT_PIN_B:
159			pirq = 1;
160			break;
161		case PCI_INTERRUPT_PIN_C:
162			pirq = 0;
163			break;
164#ifdef DIAGNOSTIC
165		default:			/* XXX gcc -Wuninitialized */
166			panic("dec_axppci_33_intr_map bogus: PCI pin %d",
167			    buspin);
168#endif
169		};
170		break;
171
172	default:
173	        printf("dec_axppci_33_intr_map: weird device number %d\n",
174		    device);
175	        return 1;
176	}
177
178#if 0
179	printf("dec_axppci_33_intr_map: device %d pin %c: pirq %d\n",
180		device, '@' + buspin, pirq);
181#endif
182
183	return sio_pirq_intr_map(pc, pirq, ihp);
184}
185