1 /* $OpenBSD: amd756.c,v 1.6 2023/01/30 10:49:05 jsg Exp $ */
2 /* $NetBSD$ */
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 Advanced Micro Devices AMD756 Peripheral Bus Controller.
61 */
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/malloc.h>
66
67 #include <machine/intr.h>
68 #include <machine/bus.h>
69
70 #include <dev/pci/pcivar.h>
71
72 #include <i386/pci/pcibiosvar.h>
73 #include <i386/pci/amd756reg.h>
74
75 struct viper_handle {
76 bus_space_tag_t ph_iot;
77 bus_space_handle_t ph_regs_ioh;
78 pci_chipset_tag_t ph_pc;
79 pcitag_t ph_tag;
80 };
81
82 int amd756_getclink(pciintr_icu_handle_t, int, int *);
83 int amd756_get_intr(pciintr_icu_handle_t, int, int *);
84 int amd756_set_intr(pciintr_icu_handle_t, int, int);
85 int amd756_get_trigger(pciintr_icu_handle_t, int, int *);
86 int amd756_set_trigger(pciintr_icu_handle_t, int, int);
87 #ifdef VIPER_DEBUG
88 static void amd756_pir_dump(struct viper_handle *);
89 #endif
90
91 const struct pciintr_icu amd756_pci_icu = {
92 amd756_getclink,
93 amd756_get_intr,
94 amd756_set_intr,
95 amd756_get_trigger,
96 amd756_set_trigger,
97 };
98
99
100 int
amd756_init(pci_chipset_tag_t pc,bus_space_tag_t iot,pcitag_t tag,pciintr_icu_tag_t * ptagp,pciintr_icu_handle_t * phandp)101 amd756_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
102 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
103 {
104 struct viper_handle *ph;
105
106 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
107 if (ph == NULL)
108 return (1);
109
110 ph->ph_iot = iot;
111 ph->ph_pc = pc;
112 ph->ph_tag = tag;
113
114 *ptagp = &amd756_pci_icu;
115 *phandp = ph;
116
117 #ifdef VIPER_DEBUG
118 amd756_pir_dump(ph);
119 #endif
120
121 return 0;
122 }
123
124 int
amd756_getclink(pciintr_icu_handle_t v,int link,int * clinkp)125 amd756_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
126 {
127 if (AMD756_LEGAL_LINK(link - 1) == 0)
128 return (1);
129
130 *clinkp = link - 1;
131 return (0);
132 }
133
134 int
amd756_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)135 amd756_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
136 {
137 struct viper_handle *ph = v;
138 pcireg_t reg;
139 int val;
140
141 if (AMD756_LEGAL_LINK(clink) == 0)
142 return (1);
143
144 reg = AMD756_GET_PIIRQSEL(ph);
145 val = (reg >> (4*clink)) & 0x0f;
146 *irqp = (val == 0) ?
147 I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
148
149 return (0);
150 }
151
152 int
amd756_set_intr(pciintr_icu_handle_t v,int clink,int irq)153 amd756_set_intr(pciintr_icu_handle_t v, int clink, int irq)
154 {
155 struct viper_handle *ph = v;
156 int val;
157 pcireg_t reg;
158
159 if (AMD756_LEGAL_LINK(clink) == 0 || AMD756_LEGAL_IRQ(irq) == 0)
160 return (1);
161
162 reg = AMD756_GET_PIIRQSEL(ph);
163 amd756_get_intr(v, clink, &val);
164 reg &= ~(0x000f << (4*clink));
165 reg |= irq << (4*clink);
166 AMD756_SET_PIIRQSEL(ph, reg);
167
168 return 0;
169 }
170
171 int
amd756_get_trigger(pciintr_icu_handle_t v,int irq,int * triggerp)172 amd756_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
173 {
174 struct viper_handle *ph = v;
175 int i, pciirq;
176 pcireg_t reg;
177
178 if (AMD756_LEGAL_IRQ(irq) == 0)
179 return (1);
180
181 for (i = 0; i <= 3; i++) {
182 amd756_get_intr(v, i, &pciirq);
183 if (pciirq == irq) {
184 reg = AMD756_GET_EDGESEL(ph);
185 if (reg & (1 << i))
186 *triggerp = IST_EDGE;
187 else
188 *triggerp = IST_LEVEL;
189 break;
190 }
191 }
192
193 return 0;
194 }
195
196 int
amd756_set_trigger(pciintr_icu_handle_t v,int irq,int trigger)197 amd756_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
198 {
199 struct viper_handle *ph = v;
200 int i, pciirq;
201 pcireg_t reg;
202
203 if (AMD756_LEGAL_IRQ(irq) == 0)
204 return (1);
205
206 for (i = 0; i <= 3; i++) {
207 amd756_get_intr(v, i, &pciirq);
208 if (pciirq == irq) {
209 reg = AMD756_GET_PIIRQSEL(ph);
210 if (trigger == IST_LEVEL)
211 reg &= ~(1 << (4*i));
212 else
213 reg |= 1 << (4*i);
214 AMD756_SET_PIIRQSEL(ph, reg);
215 break;
216 }
217 }
218
219 return (0);
220 }
221
222 #ifdef VIPER_DEBUG
223 static void
amd756_pir_dump(struct viper_handle * ph)224 amd756_pir_dump(struct viper_handle *ph)
225 {
226 int a, b;
227
228 printf ("VIPER PCI INTERRUPT ROUTING REGISTERS:\n");
229
230 a = AMD756_GET_EDGESEL(ph);
231 b = AMD756_GET_PIIRQSEL(ph);
232
233 printf ("TRIGGER: %02x, ROUTING: %04x\n", a, b);
234 }
235 #endif
236