apm.c revision 1.7
1 /* $NetBSD: apm.c,v 1.7 2003/06/29 11:02:21 darrenr 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 "apm.h" 40 41 #if NAPM > 1 42 #error only one APM emulation device may be configured 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/device.h> 50 #include <sys/fcntl.h> 51 #include <sys/ioctl.h> 52 #ifdef __OpenBSD__ 53 #include <sys/event.h> 54 #endif 55 #ifdef __NetBSD__ 56 #include <sys/select.h> 57 #include <sys/poll.h> 58 #include <sys/conf.h> 59 #endif 60 61 #ifdef __OpenBSD__ 62 #include <machine/conf.h> 63 #endif 64 #include <machine/cpu.h> 65 #include <machine/apmvar.h> 66 67 #include <macppc/dev/adbvar.h> 68 #include <macppc/dev/adb_direct.h> 69 #include <macppc/dev/pm_direct.h> 70 71 #if defined(APMDEBUG) 72 #define DPRINTF(x) printf x 73 #else 74 #define DPRINTF(x) /**/ 75 #endif 76 77 #define APM_NEVENTS 16 78 79 struct apm_softc { 80 struct device sc_dev; 81 struct selinfo sc_rsel; 82 #ifdef __OpenBSD__ 83 struct klist sc_note; 84 #endif 85 int sc_flags; 86 int event_count; 87 int event_ptr; 88 struct lock sc_lock; 89 struct apm_event_info event_list[APM_NEVENTS]; 90 }; 91 92 /* 93 * A brief note on the locking protocol: it's very simple; we 94 * assert an exclusive lock any time thread context enters the 95 * APM module. This is both the APM thread itself, as well as 96 * user context. 97 */ 98 #ifdef __NetBSD__ 99 #define APM_LOCK(apmsc) \ 100 (void) lockmgr(&(apmsc)->sc_lock, LK_EXCLUSIVE, NULL) 101 #define APM_UNLOCK(apmsc) \ 102 (void) lockmgr(&(apmsc)->sc_lock, LK_RELEASE, NULL) 103 #else 104 #define APM_LOCK(apmsc) 105 #define APM_UNLOCK(apmsc) 106 #endif 107 108 int apmmatch(struct device *, struct cfdata *, void *); 109 void apmattach(struct device *, struct device *, void *); 110 111 #ifdef __NetBSD__ 112 #if 0 113 static int apm_record_event __P((struct apm_softc *, u_int)); 114 #endif 115 #endif 116 117 CFATTACH_DECL(apm, sizeof(struct apm_softc), 118 apmmatch, apmattach, NULL, NULL); 119 120 #ifdef __OpenBSD__ 121 struct cfdriver apm_cd = { 122 NULL, "apm", DV_DULL 123 }; 124 #else 125 extern struct cfdriver apm_cd; 126 127 dev_type_open(apmopen); 128 dev_type_close(apmclose); 129 dev_type_ioctl(apmioctl); 130 dev_type_poll(apmpoll); 131 dev_type_kqfilter(apmkqfilter); 132 133 const struct cdevsw apm_cdevsw = { 134 apmopen, apmclose, noread, nowrite, apmioctl, 135 nostop, notty, apmpoll, nommap, apmkqfilter, 136 }; 137 #endif 138 139 int apm_evindex; 140 141 #define APMUNIT(dev) (minor(dev)&0xf0) 142 #define APMDEV(dev) (minor(dev)&0x0f) 143 #define APMDEV_NORMAL 0 144 #define APMDEV_CTL 8 145 146 /* 147 * Flags to control kernel display 148 * SCFLAG_NOPRINT: do not output APM power messages due to 149 * a power change event. 150 * 151 * SCFLAG_PCTPRINT: do not output APM power messages due to 152 * to a power change event unless the battery 153 * percentage changes. 154 */ 155 156 #define SCFLAG_NOPRINT 0x0008000 157 #define SCFLAG_PCTPRINT 0x0004000 158 #define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) 159 160 #define SCFLAG_OREAD (1 << 0) 161 #define SCFLAG_OWRITE (1 << 1) 162 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 163 164 165 int 166 apmmatch(parent, match, aux) 167 struct device *parent; 168 struct cfdata *match; 169 void *aux; 170 { 171 struct adb_attach_args *aa = (void *)aux; 172 if (aa->origaddr != ADBADDR_APM || 173 aa->handler_id != ADBADDR_APM || 174 aa->adbaddr != ADBADDR_APM) 175 return 0; 176 177 if (adbHardware != ADB_HW_PB) 178 return 0; 179 180 return 1; 181 } 182 183 void 184 apmattach(parent, self, aux) 185 struct device *parent, *self; 186 void *aux; 187 { 188 struct pmu_battery_info info; 189 190 pm_battery_info(0, &info); 191 192 printf(": battery flags 0x%X, ", info.flags); 193 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 194 } 195 196 int 197 apmopen(dev, flag, mode, l) 198 dev_t dev; 199 int flag, mode; 200 struct lwp *l; 201 { 202 struct apm_softc *sc; 203 int error = 0; 204 205 /* apm0 only */ 206 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 207 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 208 return ENXIO; 209 210 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 211 APMDEV(dev), l->l_proc->p_pid, flag, mode)); 212 213 APM_LOCK(sc); 214 switch (APMDEV(dev)) { 215 case APMDEV_CTL: 216 if (!(flag & FWRITE)) { 217 error = EINVAL; 218 break; 219 } 220 if (sc->sc_flags & SCFLAG_OWRITE) { 221 error = EBUSY; 222 break; 223 } 224 sc->sc_flags |= SCFLAG_OWRITE; 225 break; 226 case APMDEV_NORMAL: 227 if (!(flag & FREAD) || (flag & FWRITE)) { 228 error = EINVAL; 229 break; 230 } 231 sc->sc_flags |= SCFLAG_OREAD; 232 break; 233 default: 234 error = ENXIO; 235 break; 236 } 237 APM_UNLOCK(sc); 238 return error; 239 } 240 241 int 242 apmclose(dev, flag, mode, l) 243 dev_t dev; 244 int flag, mode; 245 struct lwp *l; 246 { 247 struct apm_softc *sc; 248 249 /* apm0 only */ 250 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 251 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 252 return ENXIO; 253 254 DPRINTF(("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, 255 flag, mode)); 256 257 APM_LOCK(sc); 258 switch (APMDEV(dev)) { 259 case APMDEV_CTL: 260 sc->sc_flags &= ~SCFLAG_OWRITE; 261 break; 262 case APMDEV_NORMAL: 263 sc->sc_flags &= ~SCFLAG_OREAD; 264 break; 265 } 266 APM_UNLOCK(sc); 267 return 0; 268 } 269 270 int 271 apmioctl(dev, cmd, data, flag, l) 272 dev_t dev; 273 u_long cmd; 274 caddr_t data; 275 int flag; 276 struct lwp *l; 277 { 278 struct apm_softc *sc; 279 struct pmu_battery_info batt; 280 struct apm_power_info *power; 281 int error = 0; 282 283 /* apm0 only */ 284 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 285 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 286 return ENXIO; 287 288 APM_LOCK(sc); 289 switch (cmd) { 290 /* some ioctl names from linux */ 291 case APM_IOC_STANDBY: 292 if ((flag & FWRITE) == 0) 293 error = EBADF; 294 case APM_IOC_SUSPEND: 295 if ((flag & FWRITE) == 0) 296 error = EBADF; 297 break; 298 case APM_IOC_PRN_CTL: 299 if ((flag & FWRITE) == 0) 300 error = EBADF; 301 else { 302 int flag = *(int *)data; 303 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", flag )); 304 switch (flag) { 305 case APM_PRINT_ON: /* enable printing */ 306 sc->sc_flags &= ~SCFLAG_PRINT; 307 break; 308 case APM_PRINT_OFF: /* disable printing */ 309 sc->sc_flags &= ~SCFLAG_PRINT; 310 sc->sc_flags |= SCFLAG_NOPRINT; 311 break; 312 case APM_PRINT_PCT: /* disable some printing */ 313 sc->sc_flags &= ~SCFLAG_PRINT; 314 sc->sc_flags |= SCFLAG_PCTPRINT; 315 break; 316 default: 317 error = EINVAL; 318 break; 319 } 320 } 321 break; 322 case APM_IOC_DEV_CTL: 323 if ((flag & FWRITE) == 0) 324 error = EBADF; 325 break; 326 case APM_IOC_GETPOWER: 327 power = (struct apm_power_info *)data; 328 329 pm_battery_info(0, &batt); 330 331 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 332 APM_AC_ON : APM_AC_OFF); 333 power->battery_life = 334 ((batt.cur_charge * 100) / batt.max_charge); 335 336 /* 337 * If the battery is charging, return the minutes left until 338 * charging is complete. apmd knows this. 339 */ 340 341 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 342 power->battery_state = APM_BATT_UNKNOWN; 343 power->minutes_left = 0; 344 power->battery_life = 0; 345 } else if ((power->ac_state == APM_AC_ON) && 346 (batt.draw > 0)) { 347 power->minutes_left = 348 (((batt.max_charge - batt.cur_charge) * 3600) / 349 batt.draw) / 60; 350 power->battery_state = APM_BATT_CHARGING; 351 } else { 352 power->minutes_left = 353 ((batt.cur_charge * 3600) / (-batt.draw)) / 60; 354 355 /* XXX - Arbitrary */ 356 if (power->battery_life > 60) { 357 power->battery_state = APM_BATT_HIGH; 358 } else if (power->battery_life < 10) { 359 power->battery_state = APM_BATT_CRITICAL; 360 } else { 361 power->battery_state = APM_BATT_LOW; 362 } 363 } 364 365 break; 366 367 default: 368 error = ENOTTY; 369 } 370 APM_UNLOCK(sc); 371 372 return error; 373 } 374 375 #ifdef __NetBSD__ 376 #if 0 377 /* 378 * return 0 if the user will notice and handle the event, 379 * return 1 if the kernel driver should do so. 380 */ 381 static int 382 apm_record_event(sc, event_type) 383 struct apm_softc *sc; 384 u_int event_type; 385 { 386 struct apm_event_info *evp; 387 388 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 389 return 1; /* no user waiting */ 390 if (sc->event_count == APM_NEVENTS) { 391 DPRINTF(("apm_record_event: queue full!\n")); 392 return 1; /* overflow */ 393 } 394 evp = &sc->event_list[sc->event_ptr]; 395 sc->event_count++; 396 sc->event_ptr++; 397 sc->event_ptr %= APM_NEVENTS; 398 evp->type = event_type; 399 evp->index = ++apm_evindex; 400 selwakeup(&sc->sc_rsel); 401 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 402 } 403 #endif 404 405 int 406 apmpoll(dev, events, l) 407 dev_t dev; 408 int events; 409 struct lwp *l; 410 { 411 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 412 int revents = 0; 413 414 APM_LOCK(sc); 415 if (events & (POLLIN | POLLRDNORM)) { 416 if (sc->event_count) 417 revents |= events & (POLLIN | POLLRDNORM); 418 else 419 selrecord(l, &sc->sc_rsel); 420 } 421 APM_UNLOCK(sc); 422 423 return (revents); 424 } 425 #endif 426 427 static void 428 filt_apmrdetach(struct knote *kn) 429 { 430 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 431 432 APM_LOCK(sc); 433 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 434 APM_UNLOCK(sc); 435 } 436 437 static int 438 filt_apmread(struct knote *kn, long hint) 439 { 440 struct apm_softc *sc = kn->kn_hook; 441 442 kn->kn_data = sc->event_count; 443 return (kn->kn_data > 0); 444 } 445 446 static struct filterops apmread_filtops = 447 { 1, NULL, filt_apmrdetach, filt_apmread}; 448 449 int 450 apmkqfilter(dev, kn) 451 dev_t dev; 452 struct knote *kn; 453 { 454 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 455 struct klist *klist; 456 457 switch (kn->kn_filter) { 458 case EVFILT_READ: 459 klist = &sc->sc_rsel.sel_klist; 460 kn->kn_fop = &apmread_filtops; 461 break; 462 default: 463 return (1); 464 } 465 466 kn->kn_hook = sc; 467 468 APM_LOCK(sc); 469 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 470 APM_UNLOCK(sc); 471 472 return (0); 473 } 474
Indexes created Thu Sep 25 16:09:42 GMT 2025