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@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
pci_2100_a50_pickintr(void * core,bus_space_tag_t iot,bus_space_tag_t memt,pci_chipset_tag_t pc)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 }
ALPHA_PCI_INTR_INIT(ST_DEC_2100_A50,pci_2100_a50_pickintr)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