1 /* $NetBSD: amd756.c,v 1.9 2011/07/01 17:37:26 dyoung Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2001 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 Advanced Micro Devices AMD756 Peripheral Bus Controller.
60 */
61
62 #include <sys/cdefs.h>
63 __KERNEL_RCSID(0, "$NetBSD: amd756.c,v 1.9 2011/07/01 17:37:26 dyoung Exp $");
64
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/device.h>
68 #include <sys/malloc.h>
69
70 #include <machine/intr.h>
71 #include <sys/bus.h>
72
73 #include <dev/pci/pcivar.h>
74 #include <dev/pci/pcireg.h>
75 #include <dev/pci/pcidevs.h>
76
77 #include <i386/pci/pci_intr_fixup.h>
78 #include <i386/pci/amd756reg.h>
79
80 struct amd756_handle {
81 bus_space_tag_t ph_iot;
82 bus_space_handle_t ph_regs_ioh;
83 pci_chipset_tag_t ph_pc;
84 pcitag_t ph_tag;
85 };
86
87 int amd756_getclink(pciintr_icu_handle_t, int, int *);
88 int amd756_get_intr(pciintr_icu_handle_t, int, int *);
89 int amd756_set_intr(pciintr_icu_handle_t, int, int);
90 int amd756_get_trigger(pciintr_icu_handle_t, int, int *);
91 int amd756_set_trigger(pciintr_icu_handle_t, int, int);
92 #ifdef AMD756_DEBUG
93 static void amd756_pir_dump(struct amd756_handle *);
94 #endif
95
96 const struct pciintr_icu amd756_pci_icu = {
97 amd756_getclink,
98 amd756_get_intr,
99 amd756_set_intr,
100 amd756_get_trigger,
101 amd756_set_trigger,
102 };
103
104
105 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)106 amd756_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
107 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
108 {
109 struct amd756_handle *ph;
110
111 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
112 if (ph == NULL)
113 return (1);
114
115 ph->ph_iot = iot;
116 ph->ph_pc = pc;
117 ph->ph_tag = tag;
118
119 *ptagp = &amd756_pci_icu;
120 *phandp = ph;
121
122 #ifdef AMD756_DEBUG
123 amd756_pir_dump(ph);
124 #endif
125
126 return (0);
127 }
128
129 int
amd756_getclink(pciintr_icu_handle_t v,int link,int * clinkp)130 amd756_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
131 {
132 if (AMD756_LEGAL_LINK(link - 1) == 0)
133 return (1);
134
135 *clinkp = link - 1;
136
137 return (0);
138 }
139
140 int
amd756_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)141 amd756_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
142 {
143 struct amd756_handle *ph = v;
144 pcireg_t reg;
145 int val;
146
147 if (AMD756_LEGAL_LINK(clink) == 0)
148 return (1);
149
150 reg = AMD756_GET_PIIRQSEL(ph);
151 val = (reg >> (4 * clink)) & 0x0f;
152 *irqp = (val == 0) ?
153 X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
154
155 return (0);
156 }
157
158 int
amd756_set_intr(pciintr_icu_handle_t v,int clink,int irq)159 amd756_set_intr(pciintr_icu_handle_t v, int clink, int irq)
160 {
161 struct amd756_handle *ph = v;
162 int val;
163 pcireg_t reg;
164
165 if (AMD756_LEGAL_LINK(clink) == 0 || AMD756_LEGAL_IRQ(irq) == 0)
166 return (1);
167
168 reg = AMD756_GET_PIIRQSEL(ph);
169 amd756_get_intr(v, clink, &val);
170 reg &= ~(0x000f << (4 * clink));
171 reg |= irq << (4 * clink);
172 AMD756_SET_PIIRQSEL(ph, reg);
173
174 return (0);
175 }
176
177 int
amd756_get_trigger(pciintr_icu_handle_t v,int irq,int * triggerp)178 amd756_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
179 {
180 struct amd756_handle *ph = v;
181 int i, pciirq;
182 pcireg_t reg;
183
184 if (AMD756_LEGAL_IRQ(irq) == 0)
185 return (1);
186
187 for (i = 0; i <= 3; i++) {
188 amd756_get_intr(v, i, &pciirq);
189 if (pciirq == irq) {
190 reg = AMD756_GET_EDGESEL(ph);
191 if (reg & (1 << i))
192 *triggerp = IST_EDGE;
193 else
194 *triggerp = IST_LEVEL;
195 break;
196 }
197 }
198
199 return (0);
200 }
201
202 int
amd756_set_trigger(pciintr_icu_handle_t v,int irq,int trigger)203 amd756_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
204 {
205 struct amd756_handle *ph = v;
206 int i, pciirq;
207 pcireg_t reg;
208
209 if (AMD756_LEGAL_IRQ(irq) == 0)
210 return (1);
211
212 for (i = 0; i <= 3; i++) {
213 amd756_get_intr(v, i, &pciirq);
214 if (pciirq == irq) {
215 reg = AMD756_GET_PIIRQSEL(ph);
216 if (trigger == IST_LEVEL)
217 reg &= ~(1 << (4 * i));
218 else
219 reg |= 1 << (4 * i);
220 AMD756_SET_PIIRQSEL(ph, reg);
221 break;
222 }
223 }
224
225 return (0);
226 }
227
228 #ifdef AMD756_DEBUG
229 static void
amd756_pir_dump(struct amd756_handle * ph)230 amd756_pir_dump(struct amd756_handle *ph)
231 {
232 int a, b;
233
234 printf ("AMD756 PCI INTERRUPT ROUTING REGISTERS:\n");
235
236 a = AMD756_GET_EDGESEL(ph);
237 b = AMD756_GET_PIIRQSEL(ph);
238
239 printf ("TRIGGER: %02x, ROUTING: %04x\n", a, b);
240 }
241 #endif
242