1 /* $NetBSD: apm.c,v 1.25 2012/10/27 17:18:00 chs 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 1.25 2012/10/27 17:18:00 chs 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 selinfo sc_rsel; 80 #ifdef __OpenBSD__ 81 struct klist sc_note; 82 #endif 83 int sc_flags; 84 int event_count; 85 int event_ptr; 86 kmutex_t sc_lock; 87 struct apm_event_info event_list[APM_NEVENTS]; 88 }; 89 90 /* 91 * A brief note on the locking protocol: it's very simple; we 92 * assert an exclusive lock any time thread context enters the 93 * APM module. This is both the APM thread itself, as well as 94 * user context. 95 */ 96 #ifdef __NetBSD__ 97 #define APM_LOCK(apmsc) mutex_enter(&(apmsc)->sc_lock) 98 #define APM_UNLOCK(apmsc) mutex_exit(&(apmsc)->sc_lock) 99 #else 100 #define APM_LOCK(apmsc) 101 #define APM_UNLOCK(apmsc) 102 #endif 103 104 int apmmatch(device_t, cfdata_t, void *); 105 void apmattach(device_t, device_t, void *); 106 107 #ifdef __NetBSD__ 108 #if 0 109 static int apm_record_event(struct apm_softc *, u_int); 110 #endif 111 #endif 112 113 CFATTACH_DECL_NEW(apm, sizeof(struct apm_softc), 114 apmmatch, apmattach, NULL, NULL); 115 116 #ifdef __OpenBSD__ 117 struct cfdriver apm_cd = { 118 NULL, "apm", DV_DULL 119 }; 120 #else 121 extern struct cfdriver apm_cd; 122 123 dev_type_open(apmopen); 124 dev_type_close(apmclose); 125 dev_type_ioctl(apmioctl); 126 dev_type_poll(apmpoll); 127 dev_type_kqfilter(apmkqfilter); 128 129 const struct cdevsw apm_cdevsw = { 130 apmopen, apmclose, noread, nowrite, apmioctl, 131 nostop, notty, apmpoll, nommap, apmkqfilter, 132 }; 133 #endif 134 135 int apm_evindex; 136 137 #define APMUNIT(dev) (minor(dev)&0xf0) 138 #define APMDEV(dev) (minor(dev)&0x0f) 139 #define APMDEV_NORMAL 0 140 #define APMDEV_CTL 8 141 142 /* 143 * Flags to control kernel display 144 * SCFLAG_NOPRINT: do not output APM power messages due to 145 * a power change event. 146 * 147 * SCFLAG_PCTPRINT: do not output APM power messages due to 148 * to a power change event unless the battery 149 * percentage changes. 150 */ 151 152 #define SCFLAG_NOPRINT 0x0008000 153 #define SCFLAG_PCTPRINT 0x0004000 154 #define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) 155 156 #define SCFLAG_OREAD (1 << 0) 157 #define SCFLAG_OWRITE (1 << 1) 158 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 159 160 161 int 162 apmmatch(device_t parent, cfdata_t match, void *aux) 163 { 164 struct adb_attach_args *aa = (void *)aux; 165 if (aa->origaddr != ADBADDR_APM || 166 aa->handler_id != ADBADDR_APM || 167 aa->adbaddr != ADBADDR_APM) 168 return 0; 169 170 if (adbHardware != ADB_HW_PMU) 171 return 0; 172 173 return 1; 174 } 175 176 void 177 apmattach(device_t parent, device_t self, void *aux) 178 { 179 struct apm_softc *sc = device_private(self); 180 struct pmu_battery_info info; 181 182 pm_battery_info(0, &info); 183 184 printf(": battery flags 0x%X, ", info.flags); 185 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 186 187 sc->sc_flags = 0; 188 sc->event_ptr = 0; 189 sc->event_count = 0; 190 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 191 selinit(&sc->sc_rsel); 192 } 193 194 int 195 apmopen(dev_t dev, int flag, int mode, struct lwp *l) 196 { 197 struct apm_softc *sc; 198 int error = 0; 199 200 /* apm0 only */ 201 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 202 if (sc == NULL) 203 return ENXIO; 204 205 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 206 APMDEV(dev), l->l_proc->p_pid, flag, mode)); 207 208 APM_LOCK(sc); 209 switch (APMDEV(dev)) { 210 case APMDEV_CTL: 211 if (!(flag & FWRITE)) { 212 error = EINVAL; 213 break; 214 } 215 if (sc->sc_flags & SCFLAG_OWRITE) { 216 error = EBUSY; 217 break; 218 } 219 sc->sc_flags |= SCFLAG_OWRITE; 220 break; 221 case APMDEV_NORMAL: 222 if (!(flag & FREAD) || (flag & FWRITE)) { 223 error = EINVAL; 224 break; 225 } 226 sc->sc_flags |= SCFLAG_OREAD; 227 break; 228 default: 229 error = ENXIO; 230 break; 231 } 232 APM_UNLOCK(sc); 233 return error; 234 } 235 236 int 237 apmclose(dev_t dev, int flag, int mode, struct lwp *l) 238 { 239 struct apm_softc *sc; 240 241 /* apm0 only */ 242 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 243 if (sc == NULL) 244 return ENXIO; 245 246 DPRINTF(("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 247 248 APM_LOCK(sc); 249 switch (APMDEV(dev)) { 250 case APMDEV_CTL: 251 sc->sc_flags &= ~SCFLAG_OWRITE; 252 break; 253 case APMDEV_NORMAL: 254 sc->sc_flags &= ~SCFLAG_OREAD; 255 break; 256 } 257 APM_UNLOCK(sc); 258 return 0; 259 } 260 261 int 262 apmioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 263 { 264 struct apm_softc *sc; 265 struct pmu_battery_info batt; 266 struct apm_power_info *power; 267 int error = 0; 268 269 /* apm0 only */ 270 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 271 if (sc == NULL) 272 return ENXIO; 273 274 APM_LOCK(sc); 275 switch (cmd) { 276 /* some ioctl names from linux */ 277 case APM_IOC_STANDBY: 278 if ((flag & FWRITE) == 0) 279 error = EBADF; 280 case APM_IOC_SUSPEND: 281 if ((flag & FWRITE) == 0) 282 error = EBADF; 283 break; 284 case APM_IOC_PRN_CTL: 285 if ((flag & FWRITE) == 0) 286 error = EBADF; 287 else { 288 int op = *(int *)data; 289 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", op )); 290 switch (op) { 291 case APM_PRINT_ON: /* enable printing */ 292 sc->sc_flags &= ~SCFLAG_PRINT; 293 break; 294 case APM_PRINT_OFF: /* disable printing */ 295 sc->sc_flags &= ~SCFLAG_PRINT; 296 sc->sc_flags |= SCFLAG_NOPRINT; 297 break; 298 case APM_PRINT_PCT: /* disable some printing */ 299 sc->sc_flags &= ~SCFLAG_PRINT; 300 sc->sc_flags |= SCFLAG_PCTPRINT; 301 break; 302 default: 303 error = EINVAL; 304 break; 305 } 306 } 307 break; 308 case APM_IOC_DEV_CTL: 309 if ((flag & FWRITE) == 0) 310 error = EBADF; 311 break; 312 case APM_IOC_GETPOWER: 313 power = (struct apm_power_info *)data; 314 315 pm_battery_info(0, &batt); 316 317 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 318 APM_AC_ON : APM_AC_OFF); 319 power->battery_life = 320 ((batt.cur_charge * 100) / batt.max_charge); 321 322 /* 323 * If the battery is charging, return the minutes left until 324 * charging is complete. apmd knows this. 325 */ 326 327 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 328 power->battery_state = APM_BATT_UNKNOWN; 329 power->minutes_left = 0; 330 power->battery_life = 0; 331 } else if ((power->ac_state == APM_AC_ON) && 332 (batt.draw > 0)) { 333 power->minutes_left = batt.secs_remaining / 60; 334 power->battery_state = APM_BATT_CHARGING; 335 } else { 336 power->minutes_left = batt.secs_remaining / 60; 337 338 /* XXX - Arbitrary */ 339 if (power->battery_life > 60) { 340 power->battery_state = APM_BATT_HIGH; 341 } else if (power->battery_life < 10) { 342 power->battery_state = APM_BATT_CRITICAL; 343 } else { 344 power->battery_state = APM_BATT_LOW; 345 } 346 } 347 348 break; 349 350 default: 351 error = ENOTTY; 352 } 353 APM_UNLOCK(sc); 354 355 return error; 356 } 357 358 #ifdef __NetBSD__ 359 #if 0 360 /* 361 * return 0 if the user will notice and handle the event, 362 * return 1 if the kernel driver should do so. 363 */ 364 static int 365 apm_record_event(struct apm_softc *sc, u_int event_type) 366 { 367 struct apm_event_info *evp; 368 369 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 370 return 1; /* no user waiting */ 371 if (sc->event_count == APM_NEVENTS) { 372 DPRINTF(("apm_record_event: queue full!\n")); 373 return 1; /* overflow */ 374 } 375 evp = &sc->event_list[sc->event_ptr]; 376 sc->event_count++; 377 sc->event_ptr++; 378 sc->event_ptr %= APM_NEVENTS; 379 evp->type = event_type; 380 evp->index = ++apm_evindex; 381 selnotify(&sc->sc_rsel, 0, 0); 382 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 383 } 384 #endif 385 386 int 387 apmpoll(dev_t dev, int events, struct lwp *l) 388 { 389 struct apm_softc *sc = device_lookup_private(&apm_cd,APMUNIT(dev)); 390 int revents = 0; 391 392 APM_LOCK(sc); 393 if (events & (POLLIN | POLLRDNORM)) { 394 if (sc->event_count) 395 revents |= events & (POLLIN | POLLRDNORM); 396 else 397 selrecord(l, &sc->sc_rsel); 398 } 399 APM_UNLOCK(sc); 400 401 return (revents); 402 } 403 #endif 404 405 static void 406 filt_apmrdetach(struct knote *kn) 407 { 408 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 409 410 APM_LOCK(sc); 411 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 412 APM_UNLOCK(sc); 413 } 414 415 static int 416 filt_apmread(struct knote *kn, long hint) 417 { 418 struct apm_softc *sc = kn->kn_hook; 419 420 kn->kn_data = sc->event_count; 421 return (kn->kn_data > 0); 422 } 423 424 static struct filterops apmread_filtops = 425 { 1, NULL, filt_apmrdetach, filt_apmread}; 426 427 int 428 apmkqfilter(dev_t dev, struct knote *kn) 429 { 430 struct apm_softc *sc = device_lookup_private(&apm_cd,APMUNIT(dev)); 431 struct klist *klist; 432 433 switch (kn->kn_filter) { 434 case EVFILT_READ: 435 klist = &sc->sc_rsel.sel_klist; 436 kn->kn_fop = &apmread_filtops; 437 break; 438 default: 439 return (1); 440 } 441 442 kn->kn_hook = sc; 443 444 APM_LOCK(sc); 445 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 446 APM_UNLOCK(sc); 447 448 return (0); 449 } 450