1 /* $NetBSD: apm.c,v 1.18 2007/12/11 23:23:02 david 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. Neither the names of the authors nor the names of contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: apm.c,v 1.18 2007/12/11 23:23:02 david Exp $"); 37 38 #include "apm.h" 39 40 #if NAPM > 1 41 #error only one APM emulation device may be configured 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/proc.h> 48 #include <sys/device.h> 49 #include <sys/fcntl.h> 50 #include <sys/ioctl.h> 51 #include <sys/mutex.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/pm_direct.h> 69 70 #if defined(APMDEBUG) 71 #define DPRINTF(x) printf x 72 #else 73 #define DPRINTF(x) /**/ 74 #endif 75 76 #define APM_NEVENTS 16 77 78 struct apm_softc { 79 struct device sc_dev; 80 struct selinfo sc_rsel; 81 #ifdef __OpenBSD__ 82 struct klist sc_note; 83 #endif 84 int sc_flags; 85 int event_count; 86 int event_ptr; 87 kmutex_t sc_lock; 88 struct apm_event_info event_list[APM_NEVENTS]; 89 }; 90 91 /* 92 * A brief note on the locking protocol: it's very simple; we 93 * assert an exclusive lock any time thread context enters the 94 * APM module. This is both the APM thread itself, as well as 95 * user context. 96 */ 97 #ifdef __NetBSD__ 98 #define APM_LOCK(apmsc) mutex_enter(&(apmsc)->sc_lock) 99 #define APM_UNLOCK(apmsc) mutex_exit(&(apmsc)->sc_lock) 100 #else 101 #define APM_LOCK(apmsc) 102 #define APM_UNLOCK(apmsc) 103 #endif 104 105 int apmmatch(struct device *, struct cfdata *, void *); 106 void apmattach(struct device *, struct device *, void *); 107 108 #ifdef __NetBSD__ 109 #if 0 110 static int apm_record_event __P((struct apm_softc *, u_int)); 111 #endif 112 #endif 113 114 CFATTACH_DECL(apm, sizeof(struct apm_softc), 115 apmmatch, apmattach, NULL, NULL); 116 117 #ifdef __OpenBSD__ 118 struct cfdriver apm_cd = { 119 NULL, "apm", DV_DULL 120 }; 121 #else 122 extern struct cfdriver apm_cd; 123 124 dev_type_open(apmopen); 125 dev_type_close(apmclose); 126 dev_type_ioctl(apmioctl); 127 dev_type_poll(apmpoll); 128 dev_type_kqfilter(apmkqfilter); 129 130 const struct cdevsw apm_cdevsw = { 131 apmopen, apmclose, noread, nowrite, apmioctl, 132 nostop, notty, apmpoll, nommap, apmkqfilter, 133 }; 134 #endif 135 136 int apm_evindex; 137 138 #define APMUNIT(dev) (minor(dev)&0xf0) 139 #define APMDEV(dev) (minor(dev)&0x0f) 140 #define APMDEV_NORMAL 0 141 #define APMDEV_CTL 8 142 143 /* 144 * Flags to control kernel display 145 * SCFLAG_NOPRINT: do not output APM power messages due to 146 * a power change event. 147 * 148 * SCFLAG_PCTPRINT: do not output APM power messages due to 149 * to a power change event unless the battery 150 * percentage changes. 151 */ 152 153 #define SCFLAG_NOPRINT 0x0008000 154 #define SCFLAG_PCTPRINT 0x0004000 155 #define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) 156 157 #define SCFLAG_OREAD (1 << 0) 158 #define SCFLAG_OWRITE (1 << 1) 159 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 160 161 162 int 163 apmmatch(parent, match, aux) 164 struct device *parent; 165 struct cfdata *match; 166 void *aux; 167 { 168 struct adb_attach_args *aa = (void *)aux; 169 if (aa->origaddr != ADBADDR_APM || 170 aa->handler_id != ADBADDR_APM || 171 aa->adbaddr != ADBADDR_APM) 172 return 0; 173 174 if (adbHardware != ADB_HW_PMU) 175 return 0; 176 177 return 1; 178 } 179 180 void 181 apmattach(parent, self, aux) 182 struct device *parent, *self; 183 void *aux; 184 { 185 struct apm_softc *sc = (struct apm_softc *) self; 186 struct pmu_battery_info info; 187 188 pm_battery_info(0, &info); 189 190 printf(": battery flags 0x%X, ", info.flags); 191 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 192 193 sc->sc_flags = 0; 194 sc->event_ptr = 0; 195 sc->event_count = 0; 196 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 197 } 198 199 int 200 apmopen(dev, flag, mode, l) 201 dev_t dev; 202 int flag, mode; 203 struct lwp *l; 204 { 205 struct apm_softc *sc; 206 int error = 0; 207 208 /* apm0 only */ 209 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 210 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 211 return ENXIO; 212 213 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 214 APMDEV(dev), l->l_proc->p_pid, flag, mode)); 215 216 APM_LOCK(sc); 217 switch (APMDEV(dev)) { 218 case APMDEV_CTL: 219 if (!(flag & FWRITE)) { 220 error = EINVAL; 221 break; 222 } 223 if (sc->sc_flags & SCFLAG_OWRITE) { 224 error = EBUSY; 225 break; 226 } 227 sc->sc_flags |= SCFLAG_OWRITE; 228 break; 229 case APMDEV_NORMAL: 230 if (!(flag & FREAD) || (flag & FWRITE)) { 231 error = EINVAL; 232 break; 233 } 234 sc->sc_flags |= SCFLAG_OREAD; 235 break; 236 default: 237 error = ENXIO; 238 break; 239 } 240 APM_UNLOCK(sc); 241 return error; 242 } 243 244 int 245 apmclose(dev, flag, mode, l) 246 dev_t dev; 247 int flag, mode; 248 struct lwp *l; 249 { 250 struct apm_softc *sc; 251 252 /* apm0 only */ 253 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 254 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 255 return ENXIO; 256 257 DPRINTF(("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 258 259 APM_LOCK(sc); 260 switch (APMDEV(dev)) { 261 case APMDEV_CTL: 262 sc->sc_flags &= ~SCFLAG_OWRITE; 263 break; 264 case APMDEV_NORMAL: 265 sc->sc_flags &= ~SCFLAG_OREAD; 266 break; 267 } 268 APM_UNLOCK(sc); 269 return 0; 270 } 271 272 int 273 apmioctl(dev, cmd, data, flag, l) 274 dev_t dev; 275 u_long cmd; 276 void *data; 277 int flag; 278 struct lwp *l; 279 { 280 struct apm_softc *sc; 281 struct pmu_battery_info batt; 282 struct apm_power_info *power; 283 int error = 0; 284 285 /* apm0 only */ 286 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 287 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 288 return ENXIO; 289 290 APM_LOCK(sc); 291 switch (cmd) { 292 /* some ioctl names from linux */ 293 case APM_IOC_STANDBY: 294 if ((flag & FWRITE) == 0) 295 error = EBADF; 296 case APM_IOC_SUSPEND: 297 if ((flag & FWRITE) == 0) 298 error = EBADF; 299 break; 300 case APM_IOC_PRN_CTL: 301 if ((flag & FWRITE) == 0) 302 error = EBADF; 303 else { 304 int op = *(int *)data; 305 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", op )); 306 switch (op) { 307 case APM_PRINT_ON: /* enable printing */ 308 sc->sc_flags &= ~SCFLAG_PRINT; 309 break; 310 case APM_PRINT_OFF: /* disable printing */ 311 sc->sc_flags &= ~SCFLAG_PRINT; 312 sc->sc_flags |= SCFLAG_NOPRINT; 313 break; 314 case APM_PRINT_PCT: /* disable some printing */ 315 sc->sc_flags &= ~SCFLAG_PRINT; 316 sc->sc_flags |= SCFLAG_PCTPRINT; 317 break; 318 default: 319 error = EINVAL; 320 break; 321 } 322 } 323 break; 324 case APM_IOC_DEV_CTL: 325 if ((flag & FWRITE) == 0) 326 error = EBADF; 327 break; 328 case APM_IOC_GETPOWER: 329 power = (struct apm_power_info *)data; 330 331 pm_battery_info(0, &batt); 332 333 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 334 APM_AC_ON : APM_AC_OFF); 335 power->battery_life = 336 ((batt.cur_charge * 100) / batt.max_charge); 337 338 /* 339 * If the battery is charging, return the minutes left until 340 * charging is complete. apmd knows this. 341 */ 342 343 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 344 power->battery_state = APM_BATT_UNKNOWN; 345 power->minutes_left = 0; 346 power->battery_life = 0; 347 } else if ((power->ac_state == APM_AC_ON) && 348 (batt.draw > 0)) { 349 power->minutes_left = batt.secs_remaining / 60; 350 power->battery_state = APM_BATT_CHARGING; 351 } else { 352 power->minutes_left = batt.secs_remaining / 60; 353 354 /* XXX - Arbitrary */ 355 if (power->battery_life > 60) { 356 power->battery_state = APM_BATT_HIGH; 357 } else if (power->battery_life < 10) { 358 power->battery_state = APM_BATT_CRITICAL; 359 } else { 360 power->battery_state = APM_BATT_LOW; 361 } 362 } 363 364 break; 365 366 default: 367 error = ENOTTY; 368 } 369 APM_UNLOCK(sc); 370 371 return error; 372 } 373 374 #ifdef __NetBSD__ 375 #if 0 376 /* 377 * return 0 if the user will notice and handle the event, 378 * return 1 if the kernel driver should do so. 379 */ 380 static int 381 apm_record_event(sc, event_type) 382 struct apm_softc *sc; 383 u_int event_type; 384 { 385 struct apm_event_info *evp; 386 387 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 388 return 1; /* no user waiting */ 389 if (sc->event_count == APM_NEVENTS) { 390 DPRINTF(("apm_record_event: queue full!\n")); 391 return 1; /* overflow */ 392 } 393 evp = &sc->event_list[sc->event_ptr]; 394 sc->event_count++; 395 sc->event_ptr++; 396 sc->event_ptr %= APM_NEVENTS; 397 evp->type = event_type; 398 evp->index = ++apm_evindex; 399 selwakeup(&sc->sc_rsel); 400 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 401 } 402 #endif 403 404 int 405 apmpoll(dev, events, l) 406 dev_t dev; 407 int events; 408 struct lwp *l; 409 { 410 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 411 int revents = 0; 412 413 APM_LOCK(sc); 414 if (events & (POLLIN | POLLRDNORM)) { 415 if (sc->event_count) 416 revents |= events & (POLLIN | POLLRDNORM); 417 else 418 selrecord(l, &sc->sc_rsel); 419 } 420 APM_UNLOCK(sc); 421 422 return (revents); 423 } 424 #endif 425 426 static void 427 filt_apmrdetach(struct knote *kn) 428 { 429 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 430 431 APM_LOCK(sc); 432 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 433 APM_UNLOCK(sc); 434 } 435 436 static int 437 filt_apmread(struct knote *kn, long hint) 438 { 439 struct apm_softc *sc = kn->kn_hook; 440 441 kn->kn_data = sc->event_count; 442 return (kn->kn_data > 0); 443 } 444 445 static struct filterops apmread_filtops = 446 { 1, NULL, filt_apmrdetach, filt_apmread}; 447 448 int 449 apmkqfilter(dev, kn) 450 dev_t dev; 451 struct knote *kn; 452 { 453 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 454 struct klist *klist; 455 456 switch (kn->kn_filter) { 457 case EVFILT_READ: 458 klist = &sc->sc_rsel.sel_klist; 459 kn->kn_fop = &apmread_filtops; 460 break; 461 default: 462 return (1); 463 } 464 465 kn->kn_hook = sc; 466 467 APM_LOCK(sc); 468 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 469 APM_UNLOCK(sc); 470 471 return (0); 472 } 473