acpi/sci: Test ACPI MADT interrupt override entry's preferred mode first
[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_fadt.c
CommitLineData
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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
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43#include "acpi_sdt.h"
44#include "acpi_sdt_var.h"
5e2a2352 45#include "acpi_sci_var.h"
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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
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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;
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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
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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
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92static void
93fadt_probe(void)
94{
95 struct acpi_fadt *fadt;
96 vm_paddr_t fadt_paddr;
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97 enum intr_trigger trig;
98 enum intr_polarity pola;
99 int enabled = 1;
100 char *env;
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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) {
115 kprintf("fadt_probe: unsupported FADT revision %d\n",
116 fadt->fadt_hdr.sdth_rev);
117 goto back;
118 }
119
120 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
121 kprintf("fadt_probe: invalid FADT length %u\n",
122 fadt->fadt_hdr.sdth_len);
123 goto back;
124 }
125
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126 kgetenv_int("hw.acpi.sci.enabled", &enabled);
127 if (!enabled)
128 goto back;
129
05ba9093 130 acpi_sci_irq = fadt->fadt_sci_int;
05ba9093 131
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132 env = kgetenv("hw.acpi.sci.trigger");
133 if (env == NULL)
134 goto back;
135
136 trig = INTR_TRIGGER_CONFORM;
137 if (strcmp(env, "edge") == 0)
138 trig = INTR_TRIGGER_EDGE;
139 else if (strcmp(env, "level") == 0)
140 trig = INTR_TRIGGER_LEVEL;
141
142 kfreeenv(env);
143
144 if (trig == INTR_TRIGGER_CONFORM)
145 goto back;
146
147 env = kgetenv("hw.acpi.sci.polarity");
148 if (env == NULL)
149 goto back;
150
151 pola = INTR_POLARITY_CONFORM;
152 if (strcmp(env, "high") == 0)
153 pola = INTR_POLARITY_HIGH;
154 else if (strcmp(env, "low") == 0)
155 pola = INTR_POLARITY_LOW;
156
157 kfreeenv(env);
158
159 if (pola == INTR_POLARITY_CONFORM)
160 goto back;
161
162 acpi_sci_trig = trig;
163 acpi_sci_pola = pola;
05ba9093 164back:
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165 if (acpi_sci_irq >= 0) {
166 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
167 intr_str_trigger(acpi_sci_trig),
168 intr_str_polarity(acpi_sci_pola));
169 } else {
170 FADT_VPRINTF("SCI is disabled\n");
171 }
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172 sdt_sdth_unmap(&fadt->fadt_hdr);
173}
174SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
5e2a2352 175
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176static void
177acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
178{
179}
180
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181static boolean_t
182acpi_sci_test(const struct acpi_sci_mode *mode)
183{
184 void *sci_desc;
185 long last_cnt;
186
187 FADT_VPRINTF("SCI testing %s/%s\n",
188 intr_str_trigger(mode->sci_trig),
189 intr_str_polarity(mode->sci_pola));
190
191 last_cnt = get_interrupt_counter(acpi_sci_irq, 0);
192
193 machintr_legacy_intr_config(acpi_sci_irq,
194 mode->sci_trig, mode->sci_pola);
195
196 sci_desc = register_int(acpi_sci_irq,
197 acpi_sci_dummy_intr, NULL, "sci", NULL,
198 INTR_EXCL | INTR_CLOCK |
199 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY, 0);
200
201 DELAY(100 * 1000);
202
203 unregister_int(sci_desc, 0);
204
205 if (get_interrupt_counter(acpi_sci_irq, 0) - last_cnt < 20) {
206 acpi_sci_trig = mode->sci_trig;
207 acpi_sci_pola = mode->sci_pola;
208
209 kprintf("ACPI FADT: SCI select %s/%s\n",
210 intr_str_trigger(acpi_sci_trig),
211 intr_str_polarity(acpi_sci_pola));
212 return TRUE;
213 }
214 return FALSE;
215}
216
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217void
218acpi_sci_config(void)
219{
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220 const struct acpi_sci_mode *mode;
221
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222 KKASSERT(mycpuid == 0);
223
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224 if (machintr_legacy_intr_find(acpi_sci_irq,
225 INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM) < 0) {
226 kprintf("ACPI FADT: SCI irq %d is invalid, disable\n",
227 acpi_sci_irq);
228 acpi_sci_irq = -1;
229 return;
230 }
231
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232 if (acpi_sci_irq < 0)
233 return;
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234
235 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
236 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
bec969af 237 machintr_legacy_intr_config(acpi_sci_irq,
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238 acpi_sci_trig, acpi_sci_pola);
239 return;
240 }
241
52234ee9 242 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
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243 if (acpi_sci_mode1 != NULL) {
244 if (acpi_sci_test(acpi_sci_mode1))
245 return;
246 }
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247 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
248 ++mode) {
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249 if (mode == acpi_sci_mode1)
250 continue;
251 if (acpi_sci_test(mode))
52234ee9 252 return;
5e2a2352 253 }
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254
255 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
256 acpi_sci_irq = -1;
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257}
258
259int
260acpi_sci_enabled(void)
261{
262 if (acpi_sci_irq >= 0)
263 return 1;
264 else
265 return 0;
266}
267
268int
269acpi_sci_pci_shariable(void)
270{
271 if (acpi_sci_irq >= 0 &&
272 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
273 acpi_sci_pola == INTR_POLARITY_LOW)
274 return 1;
275 else
276 return 0;
277}
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278
279int
280acpi_sci_irqno(void)
281{
282 return acpi_sci_irq;
283}
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284
285void
286acpi_sci_setmode1(enum intr_trigger trig, enum intr_polarity pola)
287{
288 const struct acpi_sci_mode *mode;
289
290 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
291 ++mode) {
292 if (mode->sci_trig == trig && mode->sci_pola == pola) {
293 acpi_sci_mode1 = mode;
294 return;
295 }
296 }
297}