1 /* $NetBSD: apm.c,v 1.6 2002/11/26 19:50:27 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 "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, p) 198 dev_t dev; 199 int flag, mode; 200 struct proc *p; 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), p->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, p) 243 dev_t dev; 244 int flag, mode; 245 struct proc *p; 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", p->p_pid, flag, mode)); 255 256 APM_LOCK(sc); 257 switch (APMDEV(dev)) { 258 case APMDEV_CTL: 259 sc->sc_flags &= ~SCFLAG_OWRITE; 260 break; 261 case APMDEV_NORMAL: 262 sc->sc_flags &= ~SCFLAG_OREAD; 263 break; 264 } 265 APM_UNLOCK(sc); 266 return 0; 267 } 268 269 int 270 apmioctl(dev, cmd, data, flag, p) 271 dev_t dev; 272 u_long cmd; 273 caddr_t data; 274 int flag; 275 struct proc *p; 276 { 277 struct apm_softc *sc; 278 struct pmu_battery_info batt; 279 struct apm_power_info *power; 280 int error = 0; 281 282 /* apm0 only */ 283 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 284 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 285 return ENXIO; 286 287 APM_LOCK(sc); 288 switch (cmd) { 289 /* some ioctl names from linux */ 290 case APM_IOC_STANDBY: 291 if ((flag & FWRITE) == 0) 292 error = EBADF; 293 case APM_IOC_SUSPEND: 294 if ((flag & FWRITE) == 0) 295 error = EBADF; 296 break; 297 case APM_IOC_PRN_CTL: 298 if ((flag & FWRITE) == 0) 299 error = EBADF; 300 else { 301 int flag = *(int *)data; 302 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", flag )); 303 switch (flag) { 304 case APM_PRINT_ON: /* enable printing */ 305 sc->sc_flags &= ~SCFLAG_PRINT; 306 break; 307 case APM_PRINT_OFF: /* disable printing */ 308 sc->sc_flags &= ~SCFLAG_PRINT; 309 sc->sc_flags |= SCFLAG_NOPRINT; 310 break; 311 case APM_PRINT_PCT: /* disable some printing */ 312 sc->sc_flags &= ~SCFLAG_PRINT; 313 sc->sc_flags |= SCFLAG_PCTPRINT; 314 break; 315 default: 316 error = EINVAL; 317 break; 318 } 319 } 320 break; 321 case APM_IOC_DEV_CTL: 322 if ((flag & FWRITE) == 0) 323 error = EBADF; 324 break; 325 case APM_IOC_GETPOWER: 326 power = (struct apm_power_info *)data; 327 328 pm_battery_info(0, &batt); 329 330 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 331 APM_AC_ON : APM_AC_OFF); 332 power->battery_life = 333 ((batt.cur_charge * 100) / batt.max_charge); 334 335 /* 336 * If the battery is charging, return the minutes left until 337 * charging is complete. apmd knows this. 338 */ 339 340 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 341 power->battery_state = APM_BATT_UNKNOWN; 342 power->minutes_left = 0; 343 power->battery_life = 0; 344 } else if ((power->ac_state == APM_AC_ON) && 345 (batt.draw > 0)) { 346 power->minutes_left = 347 (((batt.max_charge - batt.cur_charge) * 3600) / 348 batt.draw) / 60; 349 power->battery_state = APM_BATT_CHARGING; 350 } else { 351 power->minutes_left = 352 ((batt.cur_charge * 3600) / (-batt.draw)) / 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, p) 406 dev_t dev; 407 int events; 408 struct proc *p; 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(p, &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