Fix i386 buildkernel.
[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_fadt.c
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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>
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40#include <sys/systm.h>
41
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42#include "acpi_sdt.h"
43#include "acpi_sdt_var.h"
5e2a2352 44#include "acpi_sci_var.h"
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45
46#define FADT_VPRINTF(fmt, arg...) \
47do { \
48 if (bootverbose) \
49 kprintf("ACPI FADT: " fmt , ##arg); \
50} while (0)
51
52/* Fixed ACPI Description Table */
53struct acpi_fadt {
54 struct acpi_sdth fadt_hdr;
55 uint32_t fadt_fw_ctrl;
56 uint32_t fadt_dsdt;
57 uint8_t fadt_rsvd1;
58 uint8_t fadt_pm_prof;
59 uint16_t fadt_sci_int;
60 uint32_t fadt_smi_cmd;
61 uint8_t fadt_acpi_en;
62 uint8_t fadt_acpi_dis;
63 uint8_t fadt_s4bios;
64 uint8_t fadt_pstate;
65 /* More ... */
66} __packed;
67
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68struct acpi_sci_mode {
69 enum intr_trigger sci_trig;
70 enum intr_polarity sci_pola;
71};
72
05ba9093 73static int acpi_sci_irq = -1;
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74static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
75static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
05ba9093 76
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77static const struct acpi_sci_mode acpi_sci_modes[] = {
78 /*
79 * NOTE: Order is critical
80 */
81 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW },
82 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH },
83 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH },
84 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW },
85
86 /* Required last entry */
87 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM }
88};
89
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90static void
91fadt_probe(void)
92{
93 struct acpi_fadt *fadt;
94 vm_paddr_t fadt_paddr;
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95 enum intr_trigger trig;
96 enum intr_polarity pola;
97 int enabled = 1;
98 char *env;
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99
100 fadt_paddr = sdt_search(ACPI_FADT_SIG);
101 if (fadt_paddr == 0) {
102 kprintf("fadt_probe: can't locate FADT\n");
103 return;
104 }
105
106 fadt = sdt_sdth_map(fadt_paddr);
107 KKASSERT(fadt != NULL);
108
109 /*
110 * FADT in ACPI specification 1.0 - 4.0
111 */
112 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
113 kprintf("fadt_probe: unsupported FADT revision %d\n",
114 fadt->fadt_hdr.sdth_rev);
115 goto back;
116 }
117
118 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
119 kprintf("fadt_probe: invalid FADT length %u\n",
120 fadt->fadt_hdr.sdth_len);
121 goto back;
122 }
123
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124 kgetenv_int("hw.acpi.sci.enabled", &enabled);
125 if (!enabled)
126 goto back;
127
05ba9093 128 acpi_sci_irq = fadt->fadt_sci_int;
05ba9093 129
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130 env = kgetenv("hw.acpi.sci.trigger");
131 if (env == NULL)
132 goto back;
133
134 trig = INTR_TRIGGER_CONFORM;
135 if (strcmp(env, "edge") == 0)
136 trig = INTR_TRIGGER_EDGE;
137 else if (strcmp(env, "level") == 0)
138 trig = INTR_TRIGGER_LEVEL;
139
140 kfreeenv(env);
141
142 if (trig == INTR_TRIGGER_CONFORM)
143 goto back;
144
145 env = kgetenv("hw.acpi.sci.polarity");
146 if (env == NULL)
147 goto back;
148
149 pola = INTR_POLARITY_CONFORM;
150 if (strcmp(env, "high") == 0)
151 pola = INTR_POLARITY_HIGH;
152 else if (strcmp(env, "low") == 0)
153 pola = INTR_POLARITY_LOW;
154
155 kfreeenv(env);
156
157 if (pola == INTR_POLARITY_CONFORM)
158 goto back;
159
160 acpi_sci_trig = trig;
161 acpi_sci_pola = pola;
05ba9093 162back:
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163 if (acpi_sci_irq >= 0) {
164 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
165 intr_str_trigger(acpi_sci_trig),
166 intr_str_polarity(acpi_sci_pola));
167 } else {
168 FADT_VPRINTF("SCI is disabled\n");
169 }
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170 sdt_sdth_unmap(&fadt->fadt_hdr);
171}
172SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
5e2a2352 173
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174static void
175acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
176{
177}
178
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179void
180acpi_sci_config(void)
181{
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182 const struct acpi_sci_mode *mode;
183
184 if (acpi_sci_irq < 0)
185 return;
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186
187 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
188 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
189 machintr_intr_config(acpi_sci_irq,
190 acpi_sci_trig, acpi_sci_pola);
191 return;
192 }
193
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194 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
195 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
196 ++mode) {
197 void *sci_desc;
198 long last_cnt;
199
200 FADT_VPRINTF("SCI testing %s/%s\n",
201 intr_str_trigger(mode->sci_trig),
202 intr_str_polarity(mode->sci_pola));
203
204 last_cnt = get_interrupt_counter(acpi_sci_irq);
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205
206 machintr_intr_config(acpi_sci_irq,
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207 mode->sci_trig, mode->sci_pola);
208
209 sci_desc = register_int(acpi_sci_irq,
210 acpi_sci_dummy_intr, NULL, "sci", NULL,
211 INTR_EXCL | INTR_CLOCK |
212 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY);
213
214 DELAY(100 * 1000);
215
216 unregister_int(sci_desc);
217
218 if (get_interrupt_counter(acpi_sci_irq) - last_cnt < 20) {
219 acpi_sci_trig = mode->sci_trig;
220 acpi_sci_pola = mode->sci_pola;
221
222 kprintf("ACPI FADT: SCI select %s/%s\n",
223 intr_str_trigger(acpi_sci_trig),
224 intr_str_polarity(acpi_sci_pola));
225 return;
226 }
5e2a2352 227 }
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228
229 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
230 acpi_sci_irq = -1;
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231}
232
233int
234acpi_sci_enabled(void)
235{
236 if (acpi_sci_irq >= 0)
237 return 1;
238 else
239 return 0;
240}
241
242int
243acpi_sci_pci_shariable(void)
244{
245 if (acpi_sci_irq >= 0 &&
246 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
247 acpi_sci_pola == INTR_POLARITY_LOW)
248 return 1;
249 else
250 return 0;
251}