1 /* $NetBSD: pci_1000.c,v 1.31 2021/07/04 22:42:36 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is based on pci_kn20aa.c, written by Chris G. Demetriou at
8 * Carnegie-Mellon University. Platform support for Mikasa and Mikasa/Pinnacle
9 * (Pinkasa) by Ross Harvey with copyright assignment by permission of Avalon
10 * Computer Systems, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
36 * All rights reserved.
37 *
38 * Author: Chris G. Demetriou
39 *
40 * Permission to use, copy, modify and distribute this software and
41 * its documentation is hereby granted, provided that both the copyright
42 * notice and this permission notice appear in all copies of the
43 * software, derivative works or modified versions, and any portions
44 * thereof, and that both notices appear in supporting documentation.
45 *
46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
49 *
50 * Carnegie Mellon requests users of this software to return to
51 *
52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
53 * School of Computer Science
54 * Carnegie Mellon University
55 * Pittsburgh PA 15213-3890
56 *
57 * any improvements or extensions that they make and grant Carnegie the
58 * rights to redistribute these changes.
59 */
60
61 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
62
63 __KERNEL_RCSID(0, "$NetBSD: pci_1000.c,v 1.31 2021/07/04 22:42:36 thorpej Exp $");
64
65 #include <sys/types.h>
66 #include <sys/param.h>
67 #include <sys/time.h>
68 #include <sys/systm.h>
69 #include <sys/errno.h>
70 #include <sys/device.h>
71 #include <sys/syslog.h>
72
73 #include <machine/autoconf.h>
74 #include <machine/rpb.h>
75
76 #include <dev/pci/pcireg.h>
77 #include <dev/pci/pcivar.h>
78
79 #include "sio.h"
80 #if NSIO > 0 || NPCEB > 0
81 #include <alpha/pci/siovar.h>
82 #endif
83
84 static bus_space_tag_t another_mystery_icu_iot;
85 static bus_space_handle_t another_mystery_icu_ioh;
86
87 static int dec_1000_intr_map(const struct pci_attach_args *,
88 pci_intr_handle_t *);
89
90 #define PCI_NIRQ 16
91 #define PCI_STRAY_MAX 5
92
93 static void dec_1000_enable_intr(pci_chipset_tag_t, int irq);
94 static void dec_1000_disable_intr(pci_chipset_tag_t, int irq);
95 static void pci_1000_imi(void);
96
97 static void
pci_1000_pickintr(void * core,bus_space_tag_t iot,bus_space_tag_t memt,pci_chipset_tag_t pc)98 pci_1000_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt,
99 pci_chipset_tag_t pc)
100 {
101
102 another_mystery_icu_iot = iot;
103
104 if (bus_space_map(iot, 0x536, 2, 0, &another_mystery_icu_ioh))
105 panic("pci_1000_pickintr");
106
107 pc->pc_intr_v = core;
108 pc->pc_intr_map = dec_1000_intr_map;
109 pc->pc_intr_string = alpha_pci_generic_intr_string;
110 pc->pc_intr_evcnt = alpha_pci_generic_intr_evcnt;
111 pc->pc_intr_establish = alpha_pci_generic_intr_establish;
112 pc->pc_intr_disestablish = alpha_pci_generic_intr_disestablish;
113
114 pc->pc_pciide_compat_intr_establish = NULL;
115
116 pc->pc_intr_desc = "dec 1000";
117 pc->pc_vecbase = 0x900;
118 pc->pc_nirq = PCI_NIRQ;
119
120 pc->pc_intr_enable = dec_1000_enable_intr;
121 pc->pc_intr_disable = dec_1000_disable_intr;
122
123 pci_1000_imi();
124
125 alpha_pci_intr_alloc(pc, PCI_STRAY_MAX);
126
127 #if NSIO > 0 || NPCEB > 0
128 sio_intr_setup(pc, iot);
129 #endif
130 }
ALPHA_PCI_INTR_INIT(ST_DEC_1000,pci_1000_pickintr)131 ALPHA_PCI_INTR_INIT(ST_DEC_1000, pci_1000_pickintr)
132
133 static int
134 dec_1000_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
135 {
136 pcitag_t bustag = pa->pa_intrtag;
137 int buspin = pa->pa_intrpin;
138 pci_chipset_tag_t pc = pa->pa_pc;
139 int device = 0; /* XXX gcc */
140
141 if (buspin == 0) /* No IRQ used. */
142 return 1;
143 if (!(1 <= buspin && buspin <= 4))
144 goto bad;
145
146 pci_decompose_tag(pc, bustag, NULL, &device, NULL);
147
148 switch(device) {
149 case 6:
150 if(buspin != 1)
151 break;
152 /* integrated ncr scsi */
153 alpha_pci_intr_handle_init(ihp, 0xc, 0);
154 return 0;
155 case 11:
156 case 12:
157 case 13:
158 alpha_pci_intr_handle_init(ihp,
159 (device - 11) * 4 + buspin - 1, 0);
160 return 0;
161 }
162
163 bad: printf("dec_1000_intr_map: can't map dev %d pin %d\n", device, buspin);
164 return 1;
165 }
166
167 /*
168 * Read and write the mystery ICU IMR registers
169 */
170
171 #define IR() bus_space_read_2(another_mystery_icu_iot, \
172 another_mystery_icu_ioh, 0)
173
174 #define IW(v) bus_space_write_2(another_mystery_icu_iot, \
175 another_mystery_icu_ioh, 0, (v))
176
177 /*
178 * Enable and disable interrupts at the ICU level
179 */
180
181 static void
dec_1000_enable_intr(pci_chipset_tag_t pc __unused,int irq)182 dec_1000_enable_intr(pci_chipset_tag_t pc __unused, int irq)
183 {
184 IW(IR() | 1 << irq);
185 }
186
187 static void
dec_1000_disable_intr(pci_chipset_tag_t pc __unused,int irq)188 dec_1000_disable_intr(pci_chipset_tag_t pc __unused, int irq)
189 {
190 IW(IR() & ~(1 << irq));
191 }
192
193 /*
194 * Initialize mystery ICU
195 */
196 static void
pci_1000_imi(void)197 pci_1000_imi(void)
198 {
199 IW(0); /* XXX ?? */
200 }
201