2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
35 #include <sys/param.h>
37 #include <sys/interrupt.h>
38 #include <sys/kernel.h>
39 #include <sys/machintr.h>
40 #include <sys/systm.h>
41 #include <sys/thread2.h>
44 #include "acpi_sdt_var.h"
45 #include "acpi_sci_var.h"
47 #define FADT_VPRINTF(fmt, arg...) \
50 kprintf("ACPI FADT: " fmt , ##arg); \
53 /* Fixed ACPI Description Table */
55 struct acpi_sdth fadt_hdr;
56 uint32_t fadt_fw_ctrl;
60 uint16_t fadt_sci_int;
61 uint32_t fadt_smi_cmd;
63 uint8_t fadt_acpi_dis;
69 struct acpi_sci_mode {
70 enum intr_trigger sci_trig;
71 enum intr_polarity sci_pola;
74 static int acpi_sci_irq = -1;
75 static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
76 static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
78 static const struct acpi_sci_mode acpi_sci_modes[] = {
80 * NOTE: Order is critical
82 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW },
83 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH },
84 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH },
85 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW },
87 /* Required last entry */
88 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM }
94 struct acpi_fadt *fadt;
95 vm_paddr_t fadt_paddr;
96 enum intr_trigger trig;
97 enum intr_polarity pola;
101 fadt_paddr = sdt_search(ACPI_FADT_SIG);
102 if (fadt_paddr == 0) {
103 kprintf("fadt_probe: can't locate FADT\n");
107 fadt = sdt_sdth_map(fadt_paddr);
108 KKASSERT(fadt != NULL);
111 * FADT in ACPI specification 1.0 - 4.0
113 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
114 kprintf("fadt_probe: unsupported FADT revision %d\n",
115 fadt->fadt_hdr.sdth_rev);
119 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
120 kprintf("fadt_probe: invalid FADT length %u\n",
121 fadt->fadt_hdr.sdth_len);
125 kgetenv_int("hw.acpi.sci.enabled", &enabled);
129 acpi_sci_irq = fadt->fadt_sci_int;
131 env = kgetenv("hw.acpi.sci.trigger");
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;
143 if (trig == INTR_TRIGGER_CONFORM)
146 env = kgetenv("hw.acpi.sci.polarity");
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;
158 if (pola == INTR_POLARITY_CONFORM)
161 acpi_sci_trig = trig;
162 acpi_sci_pola = pola;
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));
169 FADT_VPRINTF("SCI is disabled\n");
171 sdt_sdth_unmap(&fadt->fadt_hdr);
173 SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
176 acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
181 acpi_sci_config(void)
183 const struct acpi_sci_mode *mode;
185 KKASSERT(mycpuid == 0);
187 if (acpi_sci_irq < 0)
190 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
191 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
192 machintr_intr_config(acpi_sci_irq,
193 acpi_sci_trig, acpi_sci_pola);
197 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
198 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
203 FADT_VPRINTF("SCI testing %s/%s\n",
204 intr_str_trigger(mode->sci_trig),
205 intr_str_polarity(mode->sci_pola));
207 last_cnt = get_interrupt_counter(acpi_sci_irq);
209 machintr_intr_config(acpi_sci_irq,
210 mode->sci_trig, mode->sci_pola);
212 sci_desc = register_int(acpi_sci_irq,
213 acpi_sci_dummy_intr, NULL, "sci", NULL,
214 INTR_EXCL | INTR_CLOCK |
215 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY, 0);
219 unregister_int(sci_desc, 0);
221 if (get_interrupt_counter(acpi_sci_irq) - last_cnt < 20) {
222 acpi_sci_trig = mode->sci_trig;
223 acpi_sci_pola = mode->sci_pola;
225 kprintf("ACPI FADT: SCI select %s/%s\n",
226 intr_str_trigger(acpi_sci_trig),
227 intr_str_polarity(acpi_sci_pola));
232 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
237 acpi_sci_enabled(void)
239 if (acpi_sci_irq >= 0)
246 acpi_sci_pci_shariable(void)
248 if (acpi_sci_irq >= 0 &&
249 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
250 acpi_sci_pola == INTR_POLARITY_LOW)