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>
42 #include <machine/pmap.h>
43 #include <machine/smp.h>
44 #include <machine/md_var.h>
45 #include <machine/specialreg.h>
48 #include "acpi_sdt_var.h"
49 #include "acpi_sci_var.h"
51 #define FADT_VPRINTF(fmt, arg...) \
54 kprintf("ACPI FADT: " fmt , ##arg); \
57 /* Fixed ACPI Description Table */
59 struct acpi_sdth fadt_hdr;
60 uint32_t fadt_fw_ctrl;
64 uint16_t fadt_sci_int;
65 uint32_t fadt_smi_cmd;
67 uint8_t fadt_acpi_dis;
73 struct acpi_sci_mode {
74 enum intr_trigger sci_trig;
75 enum intr_polarity sci_pola;
78 static int acpi_sci_irq = -1;
79 static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
80 static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
82 static const struct acpi_sci_mode acpi_sci_modes[] = {
84 * NOTE: Order is critical
86 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW },
87 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH },
88 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH },
89 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW },
91 /* Required last entry */
92 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM }
98 struct acpi_fadt *fadt;
99 vm_paddr_t fadt_paddr;
100 enum intr_trigger trig;
101 enum intr_polarity pola;
105 fadt_paddr = sdt_search(ACPI_FADT_SIG);
106 if (fadt_paddr == 0) {
107 kprintf("fadt_probe: can't locate FADT\n");
111 fadt = sdt_sdth_map(fadt_paddr);
112 KKASSERT(fadt != NULL);
115 * FADT in ACPI specification 1.0 - 4.0
117 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
118 kprintf("fadt_probe: unsupported FADT revision %d\n",
119 fadt->fadt_hdr.sdth_rev);
123 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
124 kprintf("fadt_probe: invalid FADT length %u\n",
125 fadt->fadt_hdr.sdth_len);
129 kgetenv_int("hw.acpi.sci.enabled", &enabled);
133 acpi_sci_irq = fadt->fadt_sci_int;
135 env = kgetenv("hw.acpi.sci.trigger");
139 trig = INTR_TRIGGER_CONFORM;
140 if (strcmp(env, "edge") == 0)
141 trig = INTR_TRIGGER_EDGE;
142 else if (strcmp(env, "level") == 0)
143 trig = INTR_TRIGGER_LEVEL;
147 if (trig == INTR_TRIGGER_CONFORM)
150 env = kgetenv("hw.acpi.sci.polarity");
154 pola = INTR_POLARITY_CONFORM;
155 if (strcmp(env, "high") == 0)
156 pola = INTR_POLARITY_HIGH;
157 else if (strcmp(env, "low") == 0)
158 pola = INTR_POLARITY_LOW;
162 if (pola == INTR_POLARITY_CONFORM)
165 acpi_sci_trig = trig;
166 acpi_sci_pola = pola;
168 if (acpi_sci_irq >= 0) {
169 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
170 intr_str_trigger(acpi_sci_trig),
171 intr_str_polarity(acpi_sci_pola));
173 FADT_VPRINTF("SCI is disabled\n");
175 sdt_sdth_unmap(&fadt->fadt_hdr);
177 SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
180 acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
185 acpi_sci_config(void)
187 const struct acpi_sci_mode *mode;
189 if (acpi_sci_irq < 0)
192 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
193 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
194 machintr_intr_config(acpi_sci_irq,
195 acpi_sci_trig, acpi_sci_pola);
199 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
200 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
205 FADT_VPRINTF("SCI testing %s/%s\n",
206 intr_str_trigger(mode->sci_trig),
207 intr_str_polarity(mode->sci_pola));
209 last_cnt = get_interrupt_counter(acpi_sci_irq);
211 machintr_intr_config(acpi_sci_irq,
212 mode->sci_trig, mode->sci_pola);
214 sci_desc = register_int(acpi_sci_irq,
215 acpi_sci_dummy_intr, NULL, "sci", NULL,
216 INTR_EXCL | INTR_CLOCK |
217 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY);
221 unregister_int(sci_desc);
223 if (get_interrupt_counter(acpi_sci_irq) - last_cnt < 20) {
224 acpi_sci_trig = mode->sci_trig;
225 acpi_sci_pola = mode->sci_pola;
227 kprintf("ACPI FADT: SCI select %s/%s\n",
228 intr_str_trigger(acpi_sci_trig),
229 intr_str_polarity(acpi_sci_pola));
234 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
239 acpi_sci_enabled(void)
241 if (acpi_sci_irq >= 0)
248 acpi_sci_pci_shariable(void)
250 if (acpi_sci_irq >= 0 &&
251 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
252 acpi_sci_pola == INTR_POLARITY_LOW)