1 /* $OpenBSD: sis85c503.c,v 1.7 2006/09/19 11:06:34 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 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the NetBSD
23 * Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 * contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 */
40
41 /*
42 * Copyright (c) 1999, by UCHIYAMA Yasushi
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. The name of the developer may NOT be used to endorse or promote products
51 * derived from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 */
65
66 /*
67 * Support for the SiS 85c503 PCI-ISA bridge interrupt controller.
68 */
69
70 #include <sys/param.h>
71 #include <sys/systm.h>
72 #include <sys/device.h>
73
74 #include <machine/intr.h>
75 #include <machine/bus.h>
76
77 #include <dev/pci/pcivar.h>
78 #include <dev/pci/pcireg.h>
79 #include <dev/pci/pcidevs.h>
80
81 #include <i386/pci/pcibiosvar.h>
82 #include <i386/pci/sis85c503reg.h>
83 #include <i386/pci/piixvar.h>
84
85 int sis85c503_getclink(pciintr_icu_handle_t, int, int *);
86 int sis85c503_get_intr(pciintr_icu_handle_t, int, int *);
87 int sis85c503_set_intr(pciintr_icu_handle_t, int, int);
88
89 const struct pciintr_icu sis85c503_pci_icu = {
90 sis85c503_getclink,
91 sis85c503_get_intr,
92 sis85c503_set_intr,
93 piix_get_trigger,
94 piix_set_trigger,
95 };
96
97 int
98 sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
99 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
100 {
101
102 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
103 *ptagp = &sis85c503_pci_icu;
104 return (0);
105 }
106
107 return (1);
108 }
109
110 int
111 sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
112 {
113
114 /* Pattern 1: simple. */
115 if (link >= 1 && link <= 4) {
116 *clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1;
117 return (0);
118 }
119
120 /* Pattern 2: configuration register offset */
121 if (link >= SIS85C503_CFG_PIRQ_REGSTART &&
122 link <= SIS85C503_CFG_PIRQ_REGEND) {
123 *clinkp = link;
124 return (0);
125 }
126
127 return (1);
128 }
129
130 int
131 sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
132 {
133 struct piix_handle *ph = v;
134 pcireg_t reg;
135
136 if (SIS85C503_LEGAL_LINK(clink) == 0)
137 return (1);
138
139 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
140 SIS85C503_CFG_PIRQ_REGOFS(clink));
141 reg = SIS85C503_CFG_PIRQ_REG(reg, clink);
142
143 if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE)
144 *irqp = 0xff;
145 else
146 *irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK;
147
148 return (0);
149 }
150
151 int
152 sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq)
153 {
154 struct piix_handle *ph = v;
155 int shift;
156 pcireg_t reg;
157
158 if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0)
159 return (1);
160
161 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
162 SIS85C503_CFG_PIRQ_REGOFS(clink));
163 shift = SIS85C503_CFG_PIRQ_SHIFT(clink);
164 reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE |
165 SIS85C503_CFG_PIRQ_INTR_MASK) << shift);
166 reg |= (irq << shift);
167 pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink),
168 reg);
169
170 return (0);
171 }