apm.c revision 1.24
1 /* $NetBSD: apm.c,v 1.24 2011/06/18 08:08:28 matt 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 1.24 2011/06/18 08:08:28 matt 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(device_t, cfdata_t, void *); 106 void apmattach(device_t, device_t, void *); 107 108 #ifdef __NetBSD__ 109 #if 0 110 static int apm_record_event(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(device_t parent, cfdata_t match, void *aux) 164 { 165 struct adb_attach_args *aa = (void *)aux; 166 if (aa->origaddr != ADBADDR_APM || 167 aa->handler_id != ADBADDR_APM || 168 aa->adbaddr != ADBADDR_APM) 169 return 0; 170 171 if (adbHardware != ADB_HW_PMU) 172 return 0; 173 174 return 1; 175 } 176 177 void 178 apmattach(device_t parent, device_t self, void *aux) 179 { 180 struct apm_softc *sc = (struct apm_softc *) self; 181 struct pmu_battery_info info; 182 183 pm_battery_info(0, &info); 184 185 printf(": battery flags 0x%X, ", info.flags); 186 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 187 188 sc->sc_flags = 0; 189 sc->event_ptr = 0; 190 sc->event_count = 0; 191 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 192 selinit(&sc->sc_rsel); 193 } 194 195 int 196 apmopen(dev_t dev, int flag, int mode, struct lwp *l) 197 { 198 struct apm_softc *sc; 199 int error = 0; 200 201 /* apm0 only */ 202 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 203 if (sc == NULL) 204 return ENXIO; 205 206 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 207 APMDEV(dev), l->l_proc->p_pid, flag, mode)); 208 209 APM_LOCK(sc); 210 switch (APMDEV(dev)) { 211 case APMDEV_CTL: 212 if (!(flag & FWRITE)) { 213 error = EINVAL; 214 break; 215 } 216 if (sc->sc_flags & SCFLAG_OWRITE) { 217 error = EBUSY; 218 break; 219 } 220 sc->sc_flags |= SCFLAG_OWRITE; 221 break; 222 case APMDEV_NORMAL: 223 if (!(flag & FREAD) || (flag & FWRITE)) { 224 error = EINVAL; 225 break; 226 } 227 sc->sc_flags |= SCFLAG_OREAD; 228 break; 229 default: 230 error = ENXIO; 231 break; 232 } 233 APM_UNLOCK(sc); 234 return error; 235 } 236 237 int 238 apmclose(dev_t dev, int flag, int mode, struct lwp *l) 239 { 240 struct apm_softc *sc; 241 242 /* apm0 only */ 243 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 244 if (sc == NULL) 245 return ENXIO; 246 247 DPRINTF(("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 248 249 APM_LOCK(sc); 250 switch (APMDEV(dev)) { 251 case APMDEV_CTL: 252 sc->sc_flags &= ~SCFLAG_OWRITE; 253 break; 254 case APMDEV_NORMAL: 255 sc->sc_flags &= ~SCFLAG_OREAD; 256 break; 257 } 258 APM_UNLOCK(sc); 259 return 0; 260 } 261 262 int 263 apmioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 264 { 265 struct apm_softc *sc; 266 struct pmu_battery_info batt; 267 struct apm_power_info *power; 268 int error = 0; 269 270 /* apm0 only */ 271 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 272 if (sc == NULL) 273 return ENXIO; 274 275 APM_LOCK(sc); 276 switch (cmd) { 277 /* some ioctl names from linux */ 278 case APM_IOC_STANDBY: 279 if ((flag & FWRITE) == 0) 280 error = EBADF; 281 case APM_IOC_SUSPEND: 282 if ((flag & FWRITE) == 0) 283 error = EBADF; 284 break; 285 case APM_IOC_PRN_CTL: 286 if ((flag & FWRITE) == 0) 287 error = EBADF; 288 else { 289 int op = *(int *)data; 290 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", op )); 291 switch (op) { 292 case APM_PRINT_ON: /* enable printing */ 293 sc->sc_flags &= ~SCFLAG_PRINT; 294 break; 295 case APM_PRINT_OFF: /* disable printing */ 296 sc->sc_flags &= ~SCFLAG_PRINT; 297 sc->sc_flags |= SCFLAG_NOPRINT; 298 break; 299 case APM_PRINT_PCT: /* disable some printing */ 300 sc->sc_flags &= ~SCFLAG_PRINT; 301 sc->sc_flags |= SCFLAG_PCTPRINT; 302 break; 303 default: 304 error = EINVAL; 305 break; 306 } 307 } 308 break; 309 case APM_IOC_DEV_CTL: 310 if ((flag & FWRITE) == 0) 311 error = EBADF; 312 break; 313 case APM_IOC_GETPOWER: 314 power = (struct apm_power_info *)data; 315 316 pm_battery_info(0, &batt); 317 318 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 319 APM_AC_ON : APM_AC_OFF); 320 power->battery_life = 321 ((batt.cur_charge * 100) / batt.max_charge); 322 323 /* 324 * If the battery is charging, return the minutes left until 325 * charging is complete. apmd knows this. 326 */ 327 328 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 329 power->battery_state = APM_BATT_UNKNOWN; 330 power->minutes_left = 0; 331 power->battery_life = 0; 332 } else if ((power->ac_state == APM_AC_ON) && 333 (batt.draw > 0)) { 334 power->minutes_left = batt.secs_remaining / 60; 335 power->battery_state = APM_BATT_CHARGING; 336 } else { 337 power->minutes_left = batt.secs_remaining / 60; 338 339 /* XXX - Arbitrary */ 340 if (power->battery_life > 60) { 341 power->battery_state = APM_BATT_HIGH; 342 } else if (power->battery_life < 10) { 343 power->battery_state = APM_BATT_CRITICAL; 344 } else { 345 power->battery_state = APM_BATT_LOW; 346 } 347 } 348 349 break; 350 351 default: 352 error = ENOTTY; 353 } 354 APM_UNLOCK(sc); 355 356 return error; 357 } 358 359 #ifdef __NetBSD__ 360 #if 0 361 /* 362 * return 0 if the user will notice and handle the event, 363 * return 1 if the kernel driver should do so. 364 */ 365 static int 366 apm_record_event(struct apm_softc *sc, u_int event_type) 367 { 368 struct apm_event_info *evp; 369 370 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 371 return 1; /* no user waiting */ 372 if (sc->event_count == APM_NEVENTS) { 373 DPRINTF(("apm_record_event: queue full!\n")); 374 return 1; /* overflow */ 375 } 376 evp = &sc->event_list[sc->event_ptr]; 377 sc->event_count++; 378 sc->event_ptr++; 379 sc->event_ptr %= APM_NEVENTS; 380 evp->type = event_type; 381 evp->index = ++apm_evindex; 382 selnotify(&sc->sc_rsel, 0, 0); 383 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 384 } 385 #endif 386 387 int 388 apmpoll(dev_t dev, int events, struct lwp *l) 389 { 390 struct apm_softc *sc = device_lookup_private(&apm_cd,APMUNIT(dev)); 391 int revents = 0; 392 393 APM_LOCK(sc); 394 if (events & (POLLIN | POLLRDNORM)) { 395 if (sc->event_count) 396 revents |= events & (POLLIN | POLLRDNORM); 397 else 398 selrecord(l, &sc->sc_rsel); 399 } 400 APM_UNLOCK(sc); 401 402 return (revents); 403 } 404 #endif 405 406 static void 407 filt_apmrdetach(struct knote *kn) 408 { 409 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 410 411 APM_LOCK(sc); 412 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 413 APM_UNLOCK(sc); 414 } 415 416 static int 417 filt_apmread(struct knote *kn, long hint) 418 { 419 struct apm_softc *sc = kn->kn_hook; 420 421 kn->kn_data = sc->event_count; 422 return (kn->kn_data > 0); 423 } 424 425 static struct filterops apmread_filtops = 426 { 1, NULL, filt_apmrdetach, filt_apmread}; 427 428 int 429 apmkqfilter(dev_t dev, struct knote *kn) 430 { 431 struct apm_softc *sc = device_lookup_private(&apm_cd,APMUNIT(dev)); 432 struct klist *klist; 433 434 switch (kn->kn_filter) { 435 case EVFILT_READ: 436 klist = &sc->sc_rsel.sel_klist; 437 kn->kn_fop = &apmread_filtops; 438 break; 439 default: 440 return (1); 441 } 442 443 kn->kn_hook = sc; 444 445 APM_LOCK(sc); 446 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 447 APM_UNLOCK(sc); 448 449 return (0); 450 } 451
Indexes created Fri Sep 26 08:10:20 GMT 2025