1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2001 Mitsuru IWASAKI
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/sysctl.h>
34
35 #include <vm/vm.h>
36 #include <vm/pmap.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40 #include <contrib/dev/acpica/include/actables.h>
41
42 #include <dev/acpica/acpivar.h>
43
44 #include <machine/nexusvar.h>
45
46 uint32_t acpi_resume_beep;
47 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep,
48 0, "Beep the PC speaker when resuming");
49
50 uint32_t acpi_reset_video;
51 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
52
53 static int intr_model = ACPI_INTR_PIC;
54
55 int
acpi_machdep_init(device_t dev)56 acpi_machdep_init(device_t dev)
57 {
58 struct acpi_softc *sc;
59
60 sc = device_get_softc(dev);
61
62 acpi_apm_init(sc);
63 acpi_install_wakeup_handler(sc);
64
65 if (intr_model == ACPI_INTR_PIC)
66 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
67 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
68 else
69 acpi_SetIntrModel(intr_model);
70
71 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
72 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
73 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
74 "Call the VESA reset BIOS vector on the resume path");
75
76 return (0);
77 }
78
79 void
acpi_SetDefaultIntrModel(int model)80 acpi_SetDefaultIntrModel(int model)
81 {
82
83 intr_model = model;
84 }
85
86 /* Check BIOS date. If 1998 or older, disable ACPI. */
87 int
acpi_machdep_quirks(int * quirks)88 acpi_machdep_quirks(int *quirks)
89 {
90 char *va;
91 int year;
92
93 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
94 va = pmap_mapbios(0xffff0, 16);
95 sscanf(va + 11, "%2d", &year);
96 pmap_unmapbios(va, 16);
97
98 /*
99 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
100 * check must be changed by my 114th birthday.
101 */
102 if (year > 90 && year < 99)
103 *quirks = ACPI_Q_BROKEN;
104
105 return (0);
106 }
107
108 /*
109 * Map a table. First map the header to determine the table length and then map
110 * the entire table.
111 */
112 static void *
map_table(vm_paddr_t pa,const char * sig)113 map_table(vm_paddr_t pa, const char *sig)
114 {
115 ACPI_TABLE_HEADER *header;
116 vm_size_t length;
117 void *table;
118
119 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER));
120 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {
121 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER));
122 return (NULL);
123 }
124 length = header->Length;
125 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER));
126 table = pmap_mapbios(pa, length);
127 if (ACPI_FAILURE(AcpiUtChecksum(table, length))) {
128 if (bootverbose)
129 printf("ACPI: Failed checksum for table %s\n", sig);
130 #if (ACPI_CHECKSUM_ABORT)
131 pmap_unmapbios(table, length);
132 return (NULL);
133 #endif
134 }
135 return (table);
136 }
137
138 /*
139 * See if a given ACPI table is the requested table. Returns the
140 * length of the table if it matches or zero on failure.
141 */
142 static int
probe_table(vm_paddr_t address,const char * sig)143 probe_table(vm_paddr_t address, const char *sig)
144 {
145 ACPI_TABLE_HEADER *table;
146 int ret;
147
148 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER));
149 ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0;
150 pmap_unmapbios(table, sizeof(ACPI_TABLE_HEADER));
151 return (ret);
152 }
153
154 /*
155 * Try to map a table at a given physical address previously returned
156 * by acpi_find_table().
157 */
158 void *
acpi_map_table(vm_paddr_t pa,const char * sig)159 acpi_map_table(vm_paddr_t pa, const char *sig)
160 {
161
162 return (map_table(pa, sig));
163 }
164
165 /* Unmap a table previously mapped via acpi_map_table(). */
166 void
acpi_unmap_table(void * table)167 acpi_unmap_table(void *table)
168 {
169 ACPI_TABLE_HEADER *header;
170
171 header = (ACPI_TABLE_HEADER *)table;
172 pmap_unmapbios(table, header->Length);
173 }
174
175 /*
176 * Return the physical address of the requested table or zero if one
177 * is not found.
178 */
179 vm_paddr_t
acpi_find_table(const char * sig)180 acpi_find_table(const char *sig)
181 {
182 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
183 ACPI_TABLE_RSDP *rsdp;
184 ACPI_TABLE_RSDT *rsdt;
185 ACPI_TABLE_XSDT *xsdt;
186 ACPI_TABLE_HEADER *table;
187 vm_paddr_t addr;
188 int i, count;
189
190 if (resource_disabled("acpi", 0))
191 return (0);
192
193 /*
194 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
195 * calls pmap_mapbios() to find the RSDP, we assume that we can use
196 * pmap_mapbios() to map the RSDP.
197 */
198 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
199 return (0);
200 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
201 if (rsdp == NULL) {
202 if (bootverbose)
203 printf("ACPI: Failed to map RSDP\n");
204 return (0);
205 }
206
207 /*
208 * For ACPI >= 2.0, use the XSDT if it is available.
209 * Otherwise, use the RSDT.
210 */
211 addr = 0;
212 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
213 /*
214 * AcpiOsGetRootPointer only verifies the checksum for
215 * the version 1.0 portion of the RSDP. Version 2.0 has
216 * an additional checksum that we verify first.
217 */
218 if (AcpiUtChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
219 if (bootverbose)
220 printf("ACPI: RSDP failed extended checksum\n");
221 return (0);
222 }
223 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT);
224 if (xsdt == NULL) {
225 if (bootverbose)
226 printf("ACPI: Failed to map XSDT\n");
227 return (0);
228 }
229 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
230 sizeof(UINT64);
231 for (i = 0; i < count; i++)
232 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
233 addr = xsdt->TableOffsetEntry[i];
234 break;
235 }
236 acpi_unmap_table(xsdt);
237 } else {
238 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT);
239 if (rsdt == NULL) {
240 if (bootverbose)
241 printf("ACPI: Failed to map RSDT\n");
242 return (0);
243 }
244 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
245 sizeof(UINT32);
246 for (i = 0; i < count; i++)
247 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
248 addr = rsdt->TableOffsetEntry[i];
249 break;
250 }
251 acpi_unmap_table(rsdt);
252 }
253 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP));
254 if (addr == 0)
255 return (0);
256
257 /*
258 * Verify that we can map the full table and that its checksum is
259 * correct, etc.
260 */
261 table = map_table(addr, sig);
262 if (table == NULL)
263 return (0);
264 acpi_unmap_table(table);
265
266 return (addr);
267 }
268
269 /*
270 * ACPI nexus(4) driver.
271 */
272 static int
nexus_acpi_probe(device_t dev)273 nexus_acpi_probe(device_t dev)
274 {
275 int error;
276
277 error = acpi_identify();
278 if (error)
279 return (error);
280 device_quiet(dev);
281 return (BUS_PROBE_DEFAULT);
282 }
283
284 static int
nexus_acpi_attach(device_t dev)285 nexus_acpi_attach(device_t dev)
286 {
287
288 nexus_init_resources();
289 bus_identify_children(dev);
290 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
291 panic("failed to add acpi0 device");
292
293 bus_attach_children(dev);
294 return (0);
295 }
296
297 static device_method_t nexus_acpi_methods[] = {
298 /* Device interface */
299 DEVMETHOD(device_probe, nexus_acpi_probe),
300 DEVMETHOD(device_attach, nexus_acpi_attach),
301 { 0, 0 }
302 };
303
304 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
305
306 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0);
307