acpi: Be lenient about unknown revision of FADT, MADT, XSDT and RSDT
[dragonfly.git] / sys / platform / pc64 / acpica / acpi_fadt.c
CommitLineData
05ba9093
SZ
1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/param.h>
36#include <sys/bus.h>
52234ee9 37#include <sys/interrupt.h>
05ba9093 38#include <sys/kernel.h>
5e2a2352 39#include <sys/machintr.h>
05ba9093 40#include <sys/systm.h>
6355d931 41#include <sys/thread2.h>
05ba9093 42
05ba9093
SZ
43#include "acpi_sdt.h"
44#include "acpi_sdt_var.h"
5e2a2352 45#include "acpi_sci_var.h"
05ba9093
SZ
46
47#define FADT_VPRINTF(fmt, arg...) \
48do { \
49 if (bootverbose) \
50 kprintf("ACPI FADT: " fmt , ##arg); \
51} while (0)
52
53/* Fixed ACPI Description Table */
54struct acpi_fadt {
55 struct acpi_sdth fadt_hdr;
56 uint32_t fadt_fw_ctrl;
57 uint32_t fadt_dsdt;
58 uint8_t fadt_rsvd1;
59 uint8_t fadt_pm_prof;
60 uint16_t fadt_sci_int;
61 uint32_t fadt_smi_cmd;
62 uint8_t fadt_acpi_en;
63 uint8_t fadt_acpi_dis;
64 uint8_t fadt_s4bios;
65 uint8_t fadt_pstate;
66 /* More ... */
67} __packed;
68
52234ee9
SZ
69struct acpi_sci_mode {
70 enum intr_trigger sci_trig;
71 enum intr_polarity sci_pola;
72};
73
05ba9093 74static int acpi_sci_irq = -1;
5e2a2352
SZ
75static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
76static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
c098b394 77static const struct acpi_sci_mode *acpi_sci_mode1 = NULL;
05ba9093 78
52234ee9
SZ
79static const struct acpi_sci_mode acpi_sci_modes[] = {
80 /*
81 * NOTE: Order is critical
82 */
83 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW },
84 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH },
85 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH },
86 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW },
87
88 /* Required last entry */
89 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM }
90};
91
05ba9093
SZ
92static void
93fadt_probe(void)
94{
95 struct acpi_fadt *fadt;
96 vm_paddr_t fadt_paddr;
5e2a2352
SZ
97 enum intr_trigger trig;
98 enum intr_polarity pola;
99 int enabled = 1;
100 char *env;
05ba9093
SZ
101
102 fadt_paddr = sdt_search(ACPI_FADT_SIG);
103 if (fadt_paddr == 0) {
104 kprintf("fadt_probe: can't locate FADT\n");
105 return;
106 }
107
108 fadt = sdt_sdth_map(fadt_paddr);
109 KKASSERT(fadt != NULL);
110
111 /*
112 * FADT in ACPI specification 1.0 - 4.0
113 */
114 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
fa90647a 115 kprintf("fadt_probe: unknown FADT revision %d\n",
05ba9093 116 fadt->fadt_hdr.sdth_rev);
05ba9093
SZ
117 }
118
119 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
120 kprintf("fadt_probe: invalid FADT length %u\n",
121 fadt->fadt_hdr.sdth_len);
122 goto back;
123 }
124
5e2a2352
SZ
125 kgetenv_int("hw.acpi.sci.enabled", &enabled);
126 if (!enabled)
127 goto back;
128
05ba9093 129 acpi_sci_irq = fadt->fadt_sci_int;
05ba9093 130
5e2a2352
SZ
131 env = kgetenv("hw.acpi.sci.trigger");
132 if (env == NULL)
133 goto back;
134
135 trig = INTR_TRIGGER_CONFORM;
136 if (strcmp(env, "edge") == 0)
137 trig = INTR_TRIGGER_EDGE;
138 else if (strcmp(env, "level") == 0)
139 trig = INTR_TRIGGER_LEVEL;
140
141 kfreeenv(env);
142
143 if (trig == INTR_TRIGGER_CONFORM)
144 goto back;
145
146 env = kgetenv("hw.acpi.sci.polarity");
147 if (env == NULL)
148 goto back;
149
150 pola = INTR_POLARITY_CONFORM;
151 if (strcmp(env, "high") == 0)
152 pola = INTR_POLARITY_HIGH;
153 else if (strcmp(env, "low") == 0)
154 pola = INTR_POLARITY_LOW;
155
156 kfreeenv(env);
157
158 if (pola == INTR_POLARITY_CONFORM)
159 goto back;
160
161 acpi_sci_trig = trig;
162 acpi_sci_pola = pola;
05ba9093 163back:
5e2a2352
SZ
164 if (acpi_sci_irq >= 0) {
165 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
166 intr_str_trigger(acpi_sci_trig),
167 intr_str_polarity(acpi_sci_pola));
168 } else {
169 FADT_VPRINTF("SCI is disabled\n");
170 }
05ba9093
SZ
171 sdt_sdth_unmap(&fadt->fadt_hdr);
172}
173SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
5e2a2352 174
52234ee9
SZ
175static void
176acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
177{
178}
179
c098b394
SZ
180static boolean_t
181acpi_sci_test(const struct acpi_sci_mode *mode)
182{
183 void *sci_desc;
184 long last_cnt;
185
186 FADT_VPRINTF("SCI testing %s/%s\n",
187 intr_str_trigger(mode->sci_trig),
188 intr_str_polarity(mode->sci_pola));
189
190 last_cnt = get_interrupt_counter(acpi_sci_irq, 0);
191
192 machintr_legacy_intr_config(acpi_sci_irq,
193 mode->sci_trig, mode->sci_pola);
194
195 sci_desc = register_int(acpi_sci_irq,
196 acpi_sci_dummy_intr, NULL, "sci", NULL,
197 INTR_EXCL | INTR_CLOCK |
198 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY, 0);
199
200 DELAY(100 * 1000);
201
202 unregister_int(sci_desc, 0);
203
204 if (get_interrupt_counter(acpi_sci_irq, 0) - last_cnt < 20) {
205 acpi_sci_trig = mode->sci_trig;
206 acpi_sci_pola = mode->sci_pola;
207
208 kprintf("ACPI FADT: SCI select %s/%s\n",
209 intr_str_trigger(acpi_sci_trig),
210 intr_str_polarity(acpi_sci_pola));
211 return TRUE;
212 }
213 return FALSE;
214}
215
5e2a2352
SZ
216void
217acpi_sci_config(void)
218{
52234ee9
SZ
219 const struct acpi_sci_mode *mode;
220
6355d931
SZ
221 KKASSERT(mycpuid == 0);
222
03301eb8
SZ
223 if (machintr_legacy_intr_find(acpi_sci_irq,
224 INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM) < 0) {
225 kprintf("ACPI FADT: SCI irq %d is invalid, disable\n",
226 acpi_sci_irq);
227 acpi_sci_irq = -1;
228 return;
229 }
230
52234ee9
SZ
231 if (acpi_sci_irq < 0)
232 return;
5e2a2352
SZ
233
234 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
235 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
bec969af 236 machintr_legacy_intr_config(acpi_sci_irq,
5e2a2352
SZ
237 acpi_sci_trig, acpi_sci_pola);
238 return;
239 }
240
52234ee9 241 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
c098b394
SZ
242 if (acpi_sci_mode1 != NULL) {
243 if (acpi_sci_test(acpi_sci_mode1))
244 return;
245 }
52234ee9
SZ
246 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
247 ++mode) {
c098b394
SZ
248 if (mode == acpi_sci_mode1)
249 continue;
250 if (acpi_sci_test(mode))
52234ee9 251 return;
5e2a2352 252 }
52234ee9
SZ
253
254 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
255 acpi_sci_irq = -1;
5e2a2352
SZ
256}
257
258int
259acpi_sci_enabled(void)
260{
261 if (acpi_sci_irq >= 0)
262 return 1;
263 else
264 return 0;
265}
266
267int
737d9e74 268acpi_sci_pci_shareable(void)
5e2a2352
SZ
269{
270 if (acpi_sci_irq >= 0 &&
271 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
272 acpi_sci_pola == INTR_POLARITY_LOW)
273 return 1;
274 else
275 return 0;
276}
9dba15ae
SZ
277
278int
279acpi_sci_irqno(void)
280{
281 return acpi_sci_irq;
282}
c098b394
SZ
283
284void
285acpi_sci_setmode1(enum intr_trigger trig, enum intr_polarity pola)
286{
287 const struct acpi_sci_mode *mode;
288
289 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
290 ++mode) {
291 if (mode->sci_trig == trig && mode->sci_pola == pola) {
292 acpi_sci_mode1 = mode;
293 return;
294 }
295 }
296}