Annotation of sys/arch/i386/pci/amd756.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: amd756.c,v 1.4 2006/09/19 11:06:34 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: * 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 Advanced Micro Devices AMD756 Peripheral Bus Controller.
68: */
69:
70: #include <sys/param.h>
71: #include <sys/systm.h>
72: #include <sys/device.h>
73: #include <sys/malloc.h>
74:
75: #include <machine/intr.h>
76: #include <machine/bus.h>
77:
78: #include <dev/pci/pcivar.h>
79: #include <dev/pci/pcireg.h>
80: #include <dev/pci/pcidevs.h>
81:
82: #include <i386/pci/pcibiosvar.h>
83: #include <i386/pci/amd756reg.h>
84:
85: struct viper_handle {
86: bus_space_tag_t ph_iot;
87: bus_space_handle_t ph_regs_ioh;
88: pci_chipset_tag_t ph_pc;
89: pcitag_t ph_tag;
90: };
91:
92: int amd756_getclink(pciintr_icu_handle_t, int, int *);
93: int amd756_get_intr(pciintr_icu_handle_t, int, int *);
94: int amd756_set_intr(pciintr_icu_handle_t, int, int);
95: int amd756_get_trigger(pciintr_icu_handle_t, int, int *);
96: int amd756_set_trigger(pciintr_icu_handle_t, int, int);
97: #ifdef VIPER_DEBUG
98: static void amd756_pir_dump(struct viper_handle *);
99: #endif
100:
101: const struct pciintr_icu amd756_pci_icu = {
102: amd756_getclink,
103: amd756_get_intr,
104: amd756_set_intr,
105: amd756_get_trigger,
106: amd756_set_trigger,
107: };
108:
109:
110: int
111: amd756_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
112: pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
113: {
114: struct viper_handle *ph;
115:
116: ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
117: if (ph == NULL)
118: return (1);
119:
120: ph->ph_iot = iot;
121: ph->ph_pc = pc;
122: ph->ph_tag = tag;
123:
124: *ptagp = &amd756_pci_icu;
125: *phandp = ph;
126:
127: #ifdef VIPER_DEBUG
128: amd756_pir_dump(ph);
129: #endif
130:
131: return 0;
132: }
133:
134: int
135: amd756_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
136: {
137: if (AMD756_LEGAL_LINK(link - 1) == 0)
138: return (1);
139:
140: *clinkp = link - 1;
141: return (0);
142: }
143:
144: int
145: amd756_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
146: {
147: struct viper_handle *ph = v;
148: pcireg_t reg;
149: int val;
150:
151: if (AMD756_LEGAL_LINK(clink) == 0)
152: return (1);
153:
154: reg = AMD756_GET_PIIRQSEL(ph);
155: val = (reg >> (4*clink)) & 0x0f;
156: *irqp = (val == 0) ?
157: I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
158:
159: return (0);
160: }
161:
162: int
163: amd756_set_intr(pciintr_icu_handle_t v, int clink, int irq)
164: {
165: struct viper_handle *ph = v;
166: int val;
167: pcireg_t reg;
168:
169: if (AMD756_LEGAL_LINK(clink) == 0 || AMD756_LEGAL_IRQ(irq) == 0)
170: return (1);
171:
172: reg = AMD756_GET_PIIRQSEL(ph);
173: amd756_get_intr(v, clink, &val);
174: reg &= ~(0x000f << (4*clink));
175: reg |= irq << (4*clink);
176: AMD756_SET_PIIRQSEL(ph, reg);
177:
178: return 0;
179: }
180:
181: int
182: amd756_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
183: {
184: struct viper_handle *ph = v;
185: int i, pciirq;
186: pcireg_t reg;
187:
188: if (AMD756_LEGAL_IRQ(irq) == 0)
189: return (1);
190:
191: for (i = 0; i <= 3; i++) {
192: amd756_get_intr(v, i, &pciirq);
193: if (pciirq == irq) {
194: reg = AMD756_GET_EDGESEL(ph);
195: if (reg & (1 << i))
196: *triggerp = IST_EDGE;
197: else
198: *triggerp = IST_LEVEL;
199: break;
200: }
201: }
202:
203: return 0;
204: }
205:
206: int
207: amd756_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
208: {
209: struct viper_handle *ph = v;
210: int i, pciirq;
211: pcireg_t reg;
212:
213: if (AMD756_LEGAL_IRQ(irq) == 0)
214: return (1);
215:
216: for (i = 0; i <= 3; i++) {
217: amd756_get_intr(v, i, &pciirq);
218: if (pciirq == irq) {
219: reg = AMD756_GET_PIIRQSEL(ph);
220: if (trigger == IST_LEVEL)
221: reg &= ~(1 << (4*i));
222: else
223: reg |= 1 << (4*i);
224: AMD756_SET_PIIRQSEL(ph, reg);
225: break;
226: }
227: }
228:
229: return (0);
230: }
231:
232: #ifdef VIPER_DEBUG
233: static void
234: amd756_pir_dump(struct viper_handle *ph)
235: {
236: int a, b;
237:
238: printf ("VIPER PCI INTERRUPT ROUTING REGISTERS:\n");
239:
240: a = AMD756_GET_EDGESEL(ph);
241: b = AMD756_GET_PIIRQSEL(ph);
242:
243: printf ("TRIGGER: %02x, ROUTING: %04x\n", a, b);
244: }
245: #endif
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