1 /* $OpenBSD: sis85c503.c,v 1.9 2023/01/30 10:49:05 jsg Exp $ */
2 /* $NetBSD: sis85c503.c,v 1.2 2000/07/18 11:24:09 soda Exp $ */
3
4 /*-
5 * Copyright (c) 1999 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
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) 1999, by UCHIYAMA Yasushi
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. The name of the developer may NOT be used to endorse or promote products
44 * derived from this software without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 */
58
59 /*
60 * Support for the SiS 85c503 PCI-ISA bridge interrupt controller.
61 */
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65
66 #include <machine/intr.h>
67 #include <machine/bus.h>
68
69 #include <dev/pci/pcivar.h>
70
71 #include <i386/pci/pcibiosvar.h>
72 #include <i386/pci/sis85c503reg.h>
73 #include <i386/pci/piixvar.h>
74
75 int sis85c503_getclink(pciintr_icu_handle_t, int, int *);
76 int sis85c503_get_intr(pciintr_icu_handle_t, int, int *);
77 int sis85c503_set_intr(pciintr_icu_handle_t, int, int);
78
79 const struct pciintr_icu sis85c503_pci_icu = {
80 sis85c503_getclink,
81 sis85c503_get_intr,
82 sis85c503_set_intr,
83 piix_get_trigger,
84 piix_set_trigger,
85 };
86
87 int
sis85c503_init(pci_chipset_tag_t pc,bus_space_tag_t iot,pcitag_t tag,pciintr_icu_tag_t * ptagp,pciintr_icu_handle_t * phandp)88 sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
89 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
90 {
91
92 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
93 *ptagp = &sis85c503_pci_icu;
94 return (0);
95 }
96
97 return (1);
98 }
99
100 int
sis85c503_getclink(pciintr_icu_handle_t v,int link,int * clinkp)101 sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
102 {
103
104 /* Pattern 1: simple. */
105 if (link >= 1 && link <= 4) {
106 *clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1;
107 return (0);
108 }
109
110 /* Pattern 2: configuration register offset */
111 if (link >= SIS85C503_CFG_PIRQ_REGSTART &&
112 link <= SIS85C503_CFG_PIRQ_REGEND) {
113 *clinkp = link;
114 return (0);
115 }
116
117 return (1);
118 }
119
120 int
sis85c503_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)121 sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
122 {
123 struct piix_handle *ph = v;
124 pcireg_t reg;
125
126 if (SIS85C503_LEGAL_LINK(clink) == 0)
127 return (1);
128
129 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
130 SIS85C503_CFG_PIRQ_REGOFS(clink));
131 reg = SIS85C503_CFG_PIRQ_REG(reg, clink);
132
133 if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE)
134 *irqp = 0xff;
135 else
136 *irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK;
137
138 return (0);
139 }
140
141 int
sis85c503_set_intr(pciintr_icu_handle_t v,int clink,int irq)142 sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq)
143 {
144 struct piix_handle *ph = v;
145 int shift;
146 pcireg_t reg;
147
148 if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0)
149 return (1);
150
151 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
152 SIS85C503_CFG_PIRQ_REGOFS(clink));
153 shift = SIS85C503_CFG_PIRQ_SHIFT(clink);
154 reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE |
155 SIS85C503_CFG_PIRQ_INTR_MASK) << shift);
156 reg |= (irq << shift);
157 pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink),
158 reg);
159
160 return (0);
161 }
162