2 * Copyright (c) 2001 Mitsuru IWASAKI
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/condvar.h>
34 #include <sys/fcntl.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
40 #include <contrib/dev/acpica/include/acpi.h>
42 #include <dev/acpica/acpivar.h>
43 #include <dev/acpica/acpiio.h>
45 #include <machine/apm_bios.h>
48 * APM driver emulation
51 #define APM_UNKNOWN 0xff
53 static int apm_active;
54 static struct clonedevs *apm_clones;
56 MALLOC_DEFINE(M_APMDEV, "apmdev", "APM device emulation");
58 static d_open_t apmopen;
59 static d_close_t apmclose;
60 static d_write_t apmwrite;
61 static d_ioctl_t apmioctl;
62 static d_poll_t apmpoll;
63 static d_kqfilter_t apmkqfilter;
64 static void apmreadfiltdetach(struct knote *kn);
65 static int apmreadfilt(struct knote *kn, long hint);
66 static struct filterops apm_readfiltops = {
68 .f_detach = apmreadfiltdetach,
69 .f_event = apmreadfilt,
72 static struct cdevsw apm_cdevsw = {
73 .d_version = D_VERSION,
74 .d_flags = D_TRACKCLOSE | D_NEEDMINOR,
81 .d_kqfilter = apmkqfilter
85 acpi_capm_convert_battstate(struct acpi_battinfo *battp)
91 if (battp->state & ACPI_BATT_STAT_DISCHARG) {
97 if (battp->state & ACPI_BATT_STAT_CRITICAL)
98 state = 2; /* critical */
99 if (battp->state & ACPI_BATT_STAT_CHARGING)
100 state = 3; /* charging */
102 /* If still unknown, determine it based on the battery capacity. */
103 if (state == APM_UNKNOWN) {
104 if (battp->cap >= 50)
105 state = 0; /* high */
114 acpi_capm_convert_battflags(struct acpi_battinfo *battp)
120 if (battp->cap >= 50)
121 flags |= APM_BATT_HIGH;
123 if (battp->state & ACPI_BATT_STAT_CRITICAL)
124 flags |= APM_BATT_CRITICAL;
126 flags |= APM_BATT_LOW;
128 if (battp->state & ACPI_BATT_STAT_CHARGING)
129 flags |= APM_BATT_CHARGING;
130 if (battp->state == ACPI_BATT_STAT_NOT_PRESENT)
131 flags = APM_BATT_NOT_PRESENT;
137 acpi_capm_get_info(apm_info_t aip)
140 struct acpi_battinfo batt;
142 aip->ai_infoversion = 1;
145 aip->ai_status = apm_active;
146 aip->ai_capabilities= 0xff00; /* unknown */
148 if (acpi_acad_get_acline(&acline))
149 aip->ai_acline = APM_UNKNOWN; /* unknown */
151 aip->ai_acline = acline; /* on/off */
153 if (acpi_battery_get_battinfo(NULL, &batt) != 0) {
154 aip->ai_batt_stat = APM_UNKNOWN;
155 aip->ai_batt_life = APM_UNKNOWN;
156 aip->ai_batt_time = -1; /* unknown */
157 aip->ai_batteries = ~0U; /* unknown */
159 aip->ai_batt_stat = acpi_capm_convert_battstate(&batt);
160 aip->ai_batt_life = batt.cap;
161 aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
162 aip->ai_batteries = acpi_battery_get_units();
169 acpi_capm_get_pwstatus(apm_pwstatus_t app)
172 int acline, unit, error;
173 struct acpi_battinfo batt;
175 if (app->ap_device != PMDV_ALLDEV &&
176 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
179 if (app->ap_device == PMDV_ALLDEV)
180 error = acpi_battery_get_battinfo(NULL, &batt);
182 unit = app->ap_device - PMDV_BATT0;
183 dev = devclass_get_device(devclass_find("battery"), unit);
185 error = acpi_battery_get_battinfo(dev, &batt);
192 app->ap_batt_stat = acpi_capm_convert_battstate(&batt);
193 app->ap_batt_flag = acpi_capm_convert_battflags(&batt);
194 app->ap_batt_life = batt.cap;
195 app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
197 if (acpi_acad_get_acline(&acline))
198 app->ap_acline = APM_UNKNOWN;
200 app->ap_acline = acline; /* on/off */
205 /* Create single-use devices for /dev/apm and /dev/apmctl. */
207 apm_clone(void *arg, struct ucred *cred, char *name, int namelen,
214 if (strcmp(name, "apmctl") == 0)
216 else if (strcmp(name, "apm") == 0)
221 /* Always create a new device and unit number. */
223 if (clone_create(&apm_clones, &apm_cdevsw, &unit, dev, 0)) {
225 *dev = make_dev(&apm_cdevsw, unit,
226 UID_ROOT, GID_OPERATOR, 0660, "apmctl%d", unit);
228 *dev = make_dev(&apm_cdevsw, unit,
229 UID_ROOT, GID_OPERATOR, 0664, "apm%d", unit);
233 (*dev)->si_flags |= SI_CHEAPCLONE;
238 /* Create a struct for tracking per-device suspend notification. */
239 static struct apm_clone_data *
240 apm_create_clone(struct cdev *dev, struct acpi_softc *acpi_sc)
242 struct apm_clone_data *clone;
244 clone = malloc(sizeof(*clone), M_APMDEV, M_WAITOK);
246 clone->acpi_sc = acpi_sc;
247 clone->notify_status = APM_EV_NONE;
248 bzero(&clone->sel_read, sizeof(clone->sel_read));
249 knlist_init_mtx(&clone->sel_read.si_note, &acpi_mutex);
252 * The acpi device is always managed by devd(8) and is considered
253 * writable (i.e., ack is required to allow suspend to proceed.)
255 if (strcmp("acpi", devtoname(dev)) == 0)
256 clone->flags = ACPI_EVF_DEVD | ACPI_EVF_WRITE;
258 clone->flags = ACPI_EVF_NONE;
261 STAILQ_INSERT_TAIL(&acpi_sc->apm_cdevs, clone, entries);
267 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
269 struct acpi_softc *acpi_sc;
270 struct apm_clone_data *clone;
272 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
273 clone = apm_create_clone(dev, acpi_sc);
274 dev->si_drv1 = clone;
276 /* If the device is opened for write, record that. */
277 if ((flag & FWRITE) != 0)
278 clone->flags |= ACPI_EVF_WRITE;
284 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
286 struct apm_clone_data *clone;
287 struct acpi_softc *acpi_sc;
289 clone = dev->si_drv1;
290 acpi_sc = clone->acpi_sc;
292 /* We are about to lose a reference so check if suspend should occur */
293 if (acpi_sc->acpi_next_sstate != 0 &&
294 clone->notify_status != APM_EV_ACKED)
295 acpi_AckSleepState(clone, 0);
297 /* Remove this clone's data from the list and free it. */
299 STAILQ_REMOVE(&acpi_sc->apm_cdevs, clone, apm_clone_data, entries);
300 knlist_destroy(&clone->sel_read.si_note);
302 free(clone, M_APMDEV);
303 destroy_dev_sched(dev);
308 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
311 struct apm_clone_data *clone;
312 struct acpi_softc *acpi_sc;
313 struct apm_info info;
314 struct apm_event_info *ev_info;
318 clone = dev->si_drv1;
319 acpi_sc = clone->acpi_sc;
323 if ((flag & FWRITE) == 0)
325 if (acpi_sc->acpi_next_sstate == 0) {
326 if (acpi_sc->acpi_suspend_sx != ACPI_STATE_S5) {
327 error = acpi_ReqSleepState(acpi_sc,
328 acpi_sc->acpi_suspend_sx);
331 "power off via apm suspend not supported\n");
335 error = acpi_AckSleepState(clone, 0);
338 if ((flag & FWRITE) == 0)
340 if (acpi_sc->acpi_next_sstate == 0) {
341 if (acpi_sc->acpi_standby_sx != ACPI_STATE_S5) {
342 error = acpi_ReqSleepState(acpi_sc,
343 acpi_sc->acpi_standby_sx);
346 "power off via apm standby not supported\n");
350 error = acpi_AckSleepState(clone, 0);
352 case APMIO_NEXTEVENT:
353 printf("apm nextevent start\n");
355 if (acpi_sc->acpi_next_sstate != 0 && clone->notify_status ==
357 ev_info = (struct apm_event_info *)addr;
358 if (acpi_sc->acpi_next_sstate <= ACPI_STATE_S3)
359 ev_info->type = PMEV_STANDBYREQ;
361 ev_info->type = PMEV_SUSPENDREQ;
363 clone->notify_status = APM_EV_NOTIFIED;
364 printf("apm event returning %d\n", ev_info->type);
369 case APMIO_GETINFO_OLD:
370 if (acpi_capm_get_info(&info))
372 aiop = (apm_info_old_t)addr;
373 aiop->ai_major = info.ai_major;
374 aiop->ai_minor = info.ai_minor;
375 aiop->ai_acline = info.ai_acline;
376 aiop->ai_batt_stat = info.ai_batt_stat;
377 aiop->ai_batt_life = info.ai_batt_life;
378 aiop->ai_status = info.ai_status;
381 if (acpi_capm_get_info((apm_info_t)addr))
384 case APMIO_GETPWSTATUS:
385 if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr))
389 if ((flag & FWRITE) == 0)
394 if ((flag & FWRITE) == 0)
400 case APMIO_NOTHALTCPU:
403 if ((flag & FWRITE) == 0)
407 if ((flag & FWRITE) == 0)
409 bzero(addr, sizeof(struct apm_bios_arg));
420 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
422 return (uio->uio_resid);
426 apmpoll(struct cdev *dev, int events, struct thread *td)
428 struct apm_clone_data *clone;
433 clone = dev->si_drv1;
434 if (clone->acpi_sc->acpi_next_sstate)
435 revents |= events & (POLLIN | POLLRDNORM);
437 selrecord(td, &clone->sel_read);
443 apmkqfilter(struct cdev *dev, struct knote *kn)
445 struct apm_clone_data *clone;
448 clone = dev->si_drv1;
450 kn->kn_fop = &apm_readfiltops;
451 knlist_add(&clone->sel_read.si_note, kn, 0);
457 apmreadfiltdetach(struct knote *kn)
459 struct apm_clone_data *clone;
463 knlist_remove(&clone->sel_read.si_note, kn, 0);
468 apmreadfilt(struct knote *kn, long hint)
470 struct apm_clone_data *clone;
475 sleeping = clone->acpi_sc->acpi_next_sstate ? 1 : 0;
481 acpi_apm_init(struct acpi_softc *sc)
484 /* Create a clone for /dev/acpi also. */
485 STAILQ_INIT(&sc->apm_cdevs);
486 sc->acpi_clone = apm_create_clone(sc->acpi_dev_t, sc);
487 clone_setup(&apm_clones);
488 EVENTHANDLER_REGISTER(dev_clone, apm_clone, 0, 1000);