apm.c revision 1.16
1/* $NetBSD: apm.c,v 1.16 2007/03/04 06:00:10 christos Exp $ */ 2/* $OpenBSD: apm.c,v 1.5 2002/06/07 07:13:59 miod Exp $ */ 3 4/*- 5 * Copyright (c) 2001 Alexander Guy. All rights reserved. 6 * Copyright (c) 1998-2001 Michael Shalayeff. All rights reserved. 7 * Copyright (c) 1995 John T. Kohl. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 39#include <sys/cdefs.h> 40__KERNEL_RCSID(0, "$NetBSD: apm.c,v 1.16 2007/03/04 06:00:10 christos Exp $"); 41 42#include "apm.h" 43 44#if NAPM > 1 45#error only one APM emulation device may be configured 46#endif 47 48#include <sys/param.h> 49#include <sys/systm.h> 50#include <sys/kernel.h> 51#include <sys/proc.h> 52#include <sys/device.h> 53#include <sys/fcntl.h> 54#include <sys/ioctl.h> 55#ifdef __OpenBSD__ 56#include <sys/event.h> 57#endif 58#ifdef __NetBSD__ 59#include <sys/select.h> 60#include <sys/poll.h> 61#include <sys/conf.h> 62#endif 63 64#ifdef __OpenBSD__ 65#include <machine/conf.h> 66#endif 67#include <machine/cpu.h> 68#include <machine/apmvar.h> 69 70#include <macppc/dev/adbvar.h> 71#include <macppc/dev/pm_direct.h> 72 73#if defined(APMDEBUG) 74#define DPRINTF(x) printf x 75#else 76#define DPRINTF(x) /**/ 77#endif 78 79#define APM_NEVENTS 16 80 81struct apm_softc { 82 struct device sc_dev; 83 struct selinfo sc_rsel; 84#ifdef __OpenBSD__ 85 struct klist sc_note; 86#endif 87 int sc_flags; 88 int event_count; 89 int event_ptr; 90 struct lock sc_lock; 91 struct apm_event_info event_list[APM_NEVENTS]; 92}; 93 94/* 95 * A brief note on the locking protocol: it's very simple; we 96 * assert an exclusive lock any time thread context enters the 97 * APM module. This is both the APM thread itself, as well as 98 * user context. 99 */ 100#ifdef __NetBSD__ 101#define APM_LOCK(apmsc) \ 102 (void) lockmgr(&(apmsc)->sc_lock, LK_EXCLUSIVE, NULL) 103#define APM_UNLOCK(apmsc) \ 104 (void) lockmgr(&(apmsc)->sc_lock, LK_RELEASE, NULL) 105#else 106#define APM_LOCK(apmsc) 107#define APM_UNLOCK(apmsc) 108#endif 109 110int apmmatch(struct device *, struct cfdata *, void *); 111void apmattach(struct device *, struct device *, void *); 112 113#ifdef __NetBSD__ 114#if 0 115static int apm_record_event __P((struct apm_softc *, u_int)); 116#endif 117#endif 118 119CFATTACH_DECL(apm, sizeof(struct apm_softc), 120 apmmatch, apmattach, NULL, NULL); 121 122#ifdef __OpenBSD__ 123struct cfdriver apm_cd = { 124 NULL, "apm", DV_DULL 125}; 126#else 127extern struct cfdriver apm_cd; 128 129dev_type_open(apmopen); 130dev_type_close(apmclose); 131dev_type_ioctl(apmioctl); 132dev_type_poll(apmpoll); 133dev_type_kqfilter(apmkqfilter); 134 135const struct cdevsw apm_cdevsw = { 136 apmopen, apmclose, noread, nowrite, apmioctl, 137 nostop, notty, apmpoll, nommap, apmkqfilter, 138}; 139#endif 140 141int apm_evindex; 142 143#define APMUNIT(dev) (minor(dev)&0xf0) 144#define APMDEV(dev) (minor(dev)&0x0f) 145#define APMDEV_NORMAL 0 146#define APMDEV_CTL 8 147 148/* 149 * Flags to control kernel display 150 * SCFLAG_NOPRINT: do not output APM power messages due to 151 * a power change event. 152 * 153 * SCFLAG_PCTPRINT: do not output APM power messages due to 154 * to a power change event unless the battery 155 * percentage changes. 156 */ 157 158#define SCFLAG_NOPRINT 0x0008000 159#define SCFLAG_PCTPRINT 0x0004000 160#define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) 161 162#define SCFLAG_OREAD (1 << 0) 163#define SCFLAG_OWRITE (1 << 1) 164#define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 165 166 167int 168apmmatch(parent, match, aux) 169 struct device *parent; 170 struct cfdata *match; 171 void *aux; 172{ 173 struct adb_attach_args *aa = (void *)aux; 174 if (aa->origaddr != ADBADDR_APM || 175 aa->handler_id != ADBADDR_APM || 176 aa->adbaddr != ADBADDR_APM) 177 return 0; 178 179 if (adbHardware != ADB_HW_PMU) 180 return 0; 181 182 return 1; 183} 184 185void 186apmattach(parent, self, aux) 187 struct device *parent, *self; 188 void *aux; 189{ 190 struct apm_softc *sc = (struct apm_softc *) self; 191 struct pmu_battery_info info; 192 193 pm_battery_info(0, &info); 194 195 printf(": battery flags 0x%X, ", info.flags); 196 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 197 198 sc->sc_flags = 0; 199 sc->event_ptr = 0; 200 sc->event_count = 0; 201 lockinit(&sc->sc_lock, PWAIT, "apmlk", 0, 0); 202} 203 204int 205apmopen(dev, flag, mode, l) 206 dev_t dev; 207 int flag, mode; 208 struct lwp *l; 209{ 210 struct apm_softc *sc; 211 int error = 0; 212 213 /* apm0 only */ 214 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 215 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 216 return ENXIO; 217 218 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 219 APMDEV(dev), l->l_proc->p_pid, flag, mode)); 220 221 APM_LOCK(sc); 222 switch (APMDEV(dev)) { 223 case APMDEV_CTL: 224 if (!(flag & FWRITE)) { 225 error = EINVAL; 226 break; 227 } 228 if (sc->sc_flags & SCFLAG_OWRITE) { 229 error = EBUSY; 230 break; 231 } 232 sc->sc_flags |= SCFLAG_OWRITE; 233 break; 234 case APMDEV_NORMAL: 235 if (!(flag & FREAD) || (flag & FWRITE)) { 236 error = EINVAL; 237 break; 238 } 239 sc->sc_flags |= SCFLAG_OREAD; 240 break; 241 default: 242 error = ENXIO; 243 break; 244 } 245 APM_UNLOCK(sc); 246 return error; 247} 248 249int 250apmclose(dev, flag, mode, l) 251 dev_t dev; 252 int flag, mode; 253 struct lwp *l; 254{ 255 struct apm_softc *sc; 256 257 /* apm0 only */ 258 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 259 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 260 return ENXIO; 261 262 DPRINTF(("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 263 264 APM_LOCK(sc); 265 switch (APMDEV(dev)) { 266 case APMDEV_CTL: 267 sc->sc_flags &= ~SCFLAG_OWRITE; 268 break; 269 case APMDEV_NORMAL: 270 sc->sc_flags &= ~SCFLAG_OREAD; 271 break; 272 } 273 APM_UNLOCK(sc); 274 return 0; 275} 276 277int 278apmioctl(dev, cmd, data, flag, l) 279 dev_t dev; 280 u_long cmd; 281 void *data; 282 int flag; 283 struct lwp *l; 284{ 285 struct apm_softc *sc; 286 struct pmu_battery_info batt; 287 struct apm_power_info *power; 288 int error = 0; 289 290 /* apm0 only */ 291 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 292 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 293 return ENXIO; 294 295 APM_LOCK(sc); 296 switch (cmd) { 297 /* some ioctl names from linux */ 298 case APM_IOC_STANDBY: 299 if ((flag & FWRITE) == 0) 300 error = EBADF; 301 case APM_IOC_SUSPEND: 302 if ((flag & FWRITE) == 0) 303 error = EBADF; 304 break; 305 case APM_IOC_PRN_CTL: 306 if ((flag & FWRITE) == 0) 307 error = EBADF; 308 else { 309 int op = *(int *)data; 310 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", op )); 311 switch (op) { 312 case APM_PRINT_ON: /* enable printing */ 313 sc->sc_flags &= ~SCFLAG_PRINT; 314 break; 315 case APM_PRINT_OFF: /* disable printing */ 316 sc->sc_flags &= ~SCFLAG_PRINT; 317 sc->sc_flags |= SCFLAG_NOPRINT; 318 break; 319 case APM_PRINT_PCT: /* disable some printing */ 320 sc->sc_flags &= ~SCFLAG_PRINT; 321 sc->sc_flags |= SCFLAG_PCTPRINT; 322 break; 323 default: 324 error = EINVAL; 325 break; 326 } 327 } 328 break; 329 case APM_IOC_DEV_CTL: 330 if ((flag & FWRITE) == 0) 331 error = EBADF; 332 break; 333 case APM_IOC_GETPOWER: 334 power = (struct apm_power_info *)data; 335 336 pm_battery_info(0, &batt); 337 338 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 339 APM_AC_ON : APM_AC_OFF); 340 power->battery_life = 341 ((batt.cur_charge * 100) / batt.max_charge); 342 343 /* 344 * If the battery is charging, return the minutes left until 345 * charging is complete. apmd knows this. 346 */ 347 348 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 349 power->battery_state = APM_BATT_UNKNOWN; 350 power->minutes_left = 0; 351 power->battery_life = 0; 352 } else if ((power->ac_state == APM_AC_ON) && 353 (batt.draw > 0)) { 354 power->minutes_left = batt.secs_remaining / 60; 355 power->battery_state = APM_BATT_CHARGING; 356 } else { 357 power->minutes_left = batt.secs_remaining / 60; 358 359 /* XXX - Arbitrary */ 360 if (power->battery_life > 60) { 361 power->battery_state = APM_BATT_HIGH; 362 } else if (power->battery_life < 10) { 363 power->battery_state = APM_BATT_CRITICAL; 364 } else { 365 power->battery_state = APM_BATT_LOW; 366 } 367 } 368 369 break; 370 371 default: 372 error = ENOTTY; 373 } 374 APM_UNLOCK(sc); 375 376 return error; 377} 378 379#ifdef __NetBSD__ 380#if 0 381/* 382 * return 0 if the user will notice and handle the event, 383 * return 1 if the kernel driver should do so. 384 */ 385static int 386apm_record_event(sc, event_type) 387 struct apm_softc *sc; 388 u_int event_type; 389{ 390 struct apm_event_info *evp; 391 392 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 393 return 1; /* no user waiting */ 394 if (sc->event_count == APM_NEVENTS) { 395 DPRINTF(("apm_record_event: queue full!\n")); 396 return 1; /* overflow */ 397 } 398 evp = &sc->event_list[sc->event_ptr]; 399 sc->event_count++; 400 sc->event_ptr++; 401 sc->event_ptr %= APM_NEVENTS; 402 evp->type = event_type; 403 evp->index = ++apm_evindex; 404 selwakeup(&sc->sc_rsel); 405 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 406} 407#endif 408 409int 410apmpoll(dev, events, l) 411 dev_t dev; 412 int events; 413 struct lwp *l; 414{ 415 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 416 int revents = 0; 417 418 APM_LOCK(sc); 419 if (events & (POLLIN | POLLRDNORM)) { 420 if (sc->event_count) 421 revents |= events & (POLLIN | POLLRDNORM); 422 else 423 selrecord(l, &sc->sc_rsel); 424 } 425 APM_UNLOCK(sc); 426 427 return (revents); 428} 429#endif 430 431static void 432filt_apmrdetach(struct knote *kn) 433{ 434 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 435 436 APM_LOCK(sc); 437 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 438 APM_UNLOCK(sc); 439} 440 441static int 442filt_apmread(struct knote *kn, long hint) 443{ 444 struct apm_softc *sc = kn->kn_hook; 445 446 kn->kn_data = sc->event_count; 447 return (kn->kn_data > 0); 448} 449 450static struct filterops apmread_filtops = 451 { 1, NULL, filt_apmrdetach, filt_apmread}; 452 453int 454apmkqfilter(dev, kn) 455 dev_t dev; 456 struct knote *kn; 457{ 458 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 459 struct klist *klist; 460 461 switch (kn->kn_filter) { 462 case EVFILT_READ: 463 klist = &sc->sc_rsel.sel_klist; 464 kn->kn_fop = &apmread_filtops; 465 break; 466 default: 467 return (1); 468 } 469 470 kn->kn_hook = sc; 471 472 APM_LOCK(sc); 473 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 474 APM_UNLOCK(sc); 475 476 return (0); 477} 478