1 /* $NetBSD: sis85c503.c,v 1.10 2011/07/01 17:37:27 dyoung Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1999, by UCHIYAMA Yasushi
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. The name of the developer may NOT be used to endorse or promote products
43 * derived from this software without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58 /*
59 * Support for the SiS 85c503 PCI-ISA bridge interrupt controller.
60 */
61
62 #include <sys/cdefs.h>
63 __KERNEL_RCSID(0, "$NetBSD: sis85c503.c,v 1.10 2011/07/01 17:37:27 dyoung Exp $");
64
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/device.h>
68
69 #include <machine/intr.h>
70 #include <sys/bus.h>
71
72 #include <dev/pci/pcivar.h>
73 #include <dev/pci/pcireg.h>
74 #include <dev/pci/pcidevs.h>
75
76 #include <i386/pci/pci_intr_fixup.h>
77 #include <i386/pci/sis85c503reg.h>
78 #include <i386/pci/piixvar.h>
79
80 int sis85c503_getclink(pciintr_icu_handle_t, int, int *);
81 int sis85c503_get_intr(pciintr_icu_handle_t, int, int *);
82 int sis85c503_set_intr(pciintr_icu_handle_t, int, int);
83
84 const struct pciintr_icu sis85c503_pci_icu = {
85 sis85c503_getclink,
86 sis85c503_get_intr,
87 sis85c503_set_intr,
88 piix_get_trigger,
89 piix_set_trigger,
90 };
91
92 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)93 sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
94 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
95 {
96
97 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
98 *ptagp = &sis85c503_pci_icu;
99 return (0);
100 }
101
102 return (1);
103 }
104
105 int
sis85c503_getclink(pciintr_icu_handle_t v,int link,int * clinkp)106 sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
107 {
108
109 /* Pattern 1: simple. */
110 if (link >= 1 && link <= 4) {
111 *clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1;
112 return (0);
113 }
114
115 /* Pattern 2: configuration register offset */
116 if (link >= SIS85C503_CFG_PIRQ_REGSTART &&
117 link <= SIS85C503_CFG_PIRQ_REGEND) {
118 *clinkp = link;
119 return (0);
120 }
121
122 return (1);
123 }
124
125 int
sis85c503_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)126 sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
127 {
128 struct piix_handle *ph = v;
129 pcireg_t reg;
130
131 if (SIS85C503_LEGAL_LINK(clink) == 0)
132 return (1);
133
134 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
135 SIS85C503_CFG_PIRQ_REGOFS(clink));
136 reg = SIS85C503_CFG_PIRQ_REG(reg, clink);
137
138 if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE)
139 *irqp = X86_PCI_INTERRUPT_LINE_NO_CONNECTION;
140 else
141 *irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK;
142
143 return (0);
144 }
145
146 int
sis85c503_set_intr(pciintr_icu_handle_t v,int clink,int irq)147 sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq)
148 {
149 struct piix_handle *ph = v;
150 int shift;
151 pcireg_t reg;
152
153 if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0)
154 return (1);
155
156 reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
157 SIS85C503_CFG_PIRQ_REGOFS(clink));
158 shift = SIS85C503_CFG_PIRQ_SHIFT(clink);
159 reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE |
160 SIS85C503_CFG_PIRQ_INTR_MASK) << shift);
161 reg |= (irq << shift);
162 pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink),
163 reg);
164
165 return (0);
166 }
167