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
57 static int dec_axppci_33_intr_map(const struct pci_attach_args *,
58 pci_intr_handle_t *);
59
60 static void
pci_axppci_33_pickintr(void * core,bus_space_tag_t iot,bus_space_tag_t memt,pci_chipset_tag_t pc)61 pci_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 }
ALPHA_PCI_INTR_INIT(ST_DEC_AXPPCI_33,pci_axppci_33_pickintr)81 ALPHA_PCI_INTR_INIT(ST_DEC_AXPPCI_33, pci_axppci_33_pickintr)
82
83 int
84 dec_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