1 /* $OpenBSD: via8231.c,v 1.9 2023/01/30 10:49:05 jsg 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 * Copyright (c) 2005, by Michael Shalayeff
34 * Copyright (c) 2003, by Matthew Gream
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 VIA Technologies Inc. VIA8231 PCI to ISA Bridge
61 * Based upon documentation:
62 * 1. VIA VT8231 South Bridge, Revision 1.85 (March 11, 2002), pg 73
63 * 2. VIA VT8237R South Bridge, Revision 2.06 (December 15, 2004), pg 100
64 * Derived from amd756.c
65 */
66
67 #include <sys/param.h>
68 #include <sys/systm.h>
69 #include <sys/malloc.h>
70
71 #include <machine/intr.h>
72 #include <machine/bus.h>
73
74 #include <dev/pci/pcivar.h>
75 #include <dev/pci/pcireg.h>
76 #include <dev/pci/pcidevs.h>
77
78 #include <i386/pci/pcibiosvar.h>
79 #include <i386/pci/via8231reg.h>
80
81 struct via8231_handle {
82 bus_space_tag_t ph_iot;
83 bus_space_handle_t ph_regs_ioh;
84 pci_chipset_tag_t ph_pc;
85 pcitag_t ph_tag;
86 int flags;
87 #define VT8237 0x0001
88 };
89
90 int via8231_getclink(pciintr_icu_handle_t, int, int *);
91 int via8231_get_intr(pciintr_icu_handle_t, int, int *);
92 int via8231_set_intr(pciintr_icu_handle_t, int, int);
93 int via8231_get_trigger(pciintr_icu_handle_t, int, int *);
94 int via8231_set_trigger(pciintr_icu_handle_t, int, int);
95 #ifdef VIA8231_DEBUG
96 static void via8231_pir_dump(const char*, struct via8231_handle *);
97 #endif
98
99 const struct pciintr_icu via8231_pci_icu = {
100 via8231_getclink,
101 via8231_get_intr,
102 via8231_set_intr,
103 via8231_get_trigger,
104 via8231_set_trigger,
105 };
106
107 struct mask_shft_pair {
108 int mask;
109 int shft;
110 };
111
112 static const struct mask_shft_pair via8231_routing_cnfg[VIA8231_LINK_MAX+1] = {
113 { 0x0f, 0+4 }, /*PINTA#*/
114 { 0x0f, 8+0 }, /*PINTB#*/
115 { 0x0f, 8+4 }, /*PINTC#*/
116 { 0x0f, 16+4 } /*PINTD#*/
117 };
118
119 #define VIA8231_GET_TRIGGER_CNFG(reg, pirq) \
120 ((reg) & (1 << (3 - (clink & 3))))
121 #define VIA8231_SET_TRIGGER_CNFG(reg, clink, cfg) \
122 (((reg) & ~(1 << (3 - (clink & 3)))) | ((cfg) << (3 - (clink & 3))))
123
124 #define VIA8231_GET_ROUTING_CNFG(reg, pirq) \
125 (((reg) >> via8231_routing_cnfg[(pirq)].shft) & \
126 via8231_routing_cnfg[(pirq)].mask)
127
128 #define VIA8231_SET_ROUTING_CNFG(reg, pirq, cfg) \
129 (((reg) & ~(via8231_routing_cnfg[(pirq)].mask << \
130 via8231_routing_cnfg[(pirq)].shft)) | \
131 (((cfg) & via8231_routing_cnfg[(pirq)].mask) << \
132 via8231_routing_cnfg[(pirq)].shft))
133
134 int
via8231_init(pci_chipset_tag_t pc,bus_space_tag_t iot,pcitag_t tag,pciintr_icu_tag_t * ptagp,pciintr_icu_handle_t * phandp)135 via8231_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
136 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
137 {
138 struct via8231_handle *ph;
139 pcireg_t id;
140
141 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
142 if (ph == NULL)
143 return (1);
144
145 ph->ph_iot = iot;
146 ph->ph_pc = pc;
147 ph->ph_tag = tag;
148 id = pci_conf_read(pc, tag, PCI_ID_REG);
149 ph->flags = PCI_VENDOR(id) == PCI_VENDOR_VIATECH &&
150 PCI_PRODUCT(id) == PCI_PRODUCT_VIATECH_VT8231_ISA? 0 : VT8237;
151
152 *ptagp = &via8231_pci_icu;
153 *phandp = ph;
154
155 #ifdef VIA8231_DEBUG
156 via8231_pir_dump("via8231_init", ph);
157 #endif
158
159 return 0;
160 }
161
162 int
via8231_getclink(pciintr_icu_handle_t v,int link,int * clinkp)163 via8231_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
164 {
165 struct via8231_handle *ph = v;
166
167 if ((ph->flags & VT8237) && !VIA8237_LINK_LEGAL(link - 1))
168 return (1);
169
170 if (!(ph->flags & VT8237) && !VIA8231_LINK_LEGAL(link - 1))
171 return (1);
172
173 *clinkp = link - 1;
174 return (0);
175 }
176
177 int
via8231_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)178 via8231_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
179 {
180 struct via8231_handle *ph = v;
181 int reg, val;
182
183 if (VIA8237_LINK_LEGAL(clink) == 0)
184 return (1);
185
186 if (VIA8231_LINK_LEGAL(clink)) {
187 reg = VIA8231_GET_ROUTING(ph);
188 val = VIA8231_GET_ROUTING_CNFG(reg, clink);
189 } else {
190 reg = VIA8237_GET_ROUTING(ph);
191 val = (reg >> ((clink & 3) * 4)) & 0xf;
192 }
193
194 *irqp = (val == VIA8231_ROUTING_CNFG_DISABLED) ?
195 I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
196
197 return (0);
198 }
199
200 int
via8231_set_intr(pciintr_icu_handle_t v,int clink,int irq)201 via8231_set_intr(pciintr_icu_handle_t v, int clink, int irq)
202 {
203 struct via8231_handle *ph = v;
204 int reg;
205
206 if (VIA8237_LINK_LEGAL(clink) == 0 || VIA8231_PIRQ_LEGAL(irq) == 0)
207 return (1);
208
209 #ifdef VIA8231_DEBUG
210 printf("via8231_set_intr: link(%02x) --> irq(%02x)\n", clink, irq);
211 via8231_pir_dump("via8231_set_intr: ", ph);
212 #endif
213
214 if (VIA8231_LINK_LEGAL(clink)) {
215 reg = VIA8231_GET_ROUTING(ph);
216 VIA8231_SET_ROUTING(ph,
217 VIA8231_SET_ROUTING_CNFG(reg, clink, irq));
218 } else {
219 reg = VIA8237_GET_ROUTING(ph);
220 VIA8237_SET_ROUTING(ph, (reg & ~(0xf << (clink & 3))) |
221 ((irq & 0xf) << (clink & 3)));
222 }
223
224 return (0);
225 }
226
227 int
via8231_get_trigger(pciintr_icu_handle_t v,int irq,int * triggerp)228 via8231_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
229 {
230 struct via8231_handle *ph = v;
231 int reg, clink, max, pciirq;
232
233 if (VIA8231_PIRQ_LEGAL(irq) == 0)
234 return (1);
235
236 max = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
237 for (clink = 0; clink <= max; clink++) {
238 via8231_get_intr(v, clink, &pciirq);
239 if (pciirq == irq) {
240 reg = VIA8231_LINK_LEGAL(clink)?
241 VIA8231_GET_TRIGGER(ph):
242 VIA8237_GET_TRIGGER(ph);
243 *triggerp = VIA8231_GET_TRIGGER_CNFG(reg, clink)?
244 IST_EDGE : IST_LEVEL;
245 return (0);
246 }
247 }
248
249 return (1);
250 }
251
252 int
via8231_set_trigger(pciintr_icu_handle_t v,int irq,int trigger)253 via8231_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
254 {
255 struct via8231_handle *ph = v;
256 int reg, clink, max, pciirq;
257
258 if (VIA8231_PIRQ_LEGAL(irq) == 0 || VIA8231_TRIG_LEGAL(trigger) == 0)
259 return (1);
260
261 #ifdef VIA8231_DEBUG
262 printf("via8231_set_trig: irq(%02x) --> trig(%02x)\n", irq, trigger);
263 via8231_pir_dump("via8231_set_trig: ", ph);
264 #endif
265
266 max = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
267 for (clink = 0; clink <= VIA8231_LINK_MAX; clink++) {
268 via8231_get_intr(v, clink, &pciirq);
269 if (pciirq == irq) {
270 reg = VIA8231_LINK_LEGAL(clink)?
271 VIA8231_GET_TRIGGER(ph):
272 VIA8237_GET_TRIGGER(ph);
273 switch (trigger) {
274 case IST_LEVEL:
275 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
276 VIA8231_TRIGGER_CNFG_LEVEL);
277 break;
278 case IST_EDGE:
279 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
280 VIA8231_TRIGGER_CNFG_EDGE);
281 break;
282 default:
283 return (1);
284 }
285 if (VIA8231_LINK_LEGAL(clink))
286 VIA8231_SET_TRIGGER(ph, reg);
287 else
288 VIA8237_SET_TRIGGER(ph, reg);
289 return (0);
290 }
291 }
292
293 return (1);
294 }
295
296 #ifdef VIA8231_DEBUG
297 static void
via8231_pir_dump(const char * m,struct via8231_handle * ph)298 via8231_pir_dump(const char *m, struct via8231_handle *ph)
299 {
300 int a, b;
301
302 a = VIA8231_GET_TRIGGER(ph);
303 b = VIA8231_GET_ROUTING(ph);
304
305 printf("%s STATE: trigger(%02x), routing(%08x)\n", m, a, b);
306 }
307 #endif
308