apm.c revision 139790
1193326Sed/*- 2193326Sed * APM (Advanced Power Management) BIOS Device Driver 3193326Sed * 4193326Sed * Copyright (c) 1994 UKAI, Fumitoshi. 5193326Sed * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 6193326Sed * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org> 7193326Sed * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org> 8193326Sed * 9193326Sed * This software may be used, modified, copied, and distributed, in 10221345Sdim * both source and binary form provided that the above copyright and 11193326Sed * these terms are retained. Under no circumstances is the author 12193326Sed * responsible for the proper functioning of this software, nor does 13193326Sed * the author assume any responsibility for damages incurred with its 14221345Sdim * use. 15221345Sdim * 16243830Sdim * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD) 17221345Sdim */ 18223017Sdim 19221345Sdim#include <sys/cdefs.h> 20239462Sdim__FBSDID("$FreeBSD: head/sys/i386/bios/apm.c 139790 2005-01-06 22:18:23Z imp $"); 21221345Sdim 22221345Sdim#include <sys/param.h> 23221345Sdim#include <sys/systm.h> 24221345Sdim#include <sys/bus.h> 25193326Sed#include <sys/conf.h> 26243830Sdim#include <sys/eventhandler.h> 27234353Sdim#include <sys/fcntl.h> 28193326Sed#include <sys/kernel.h> 29193326Sed#include <sys/module.h> 30193326Sed#include <sys/poll.h> 31239462Sdim#include <sys/power.h> 32239462Sdim#include <sys/reboot.h> 33221345Sdim#include <sys/selinfo.h> 34221345Sdim#include <sys/signalvar.h> 35221345Sdim#include <sys/sysctl.h> 36221345Sdim#include <sys/syslog.h> 37221345Sdim#include <sys/time.h> 38221345Sdim#include <sys/uio.h> 39221345Sdim 40221345Sdim#include <machine/apm_bios.h> 41221345Sdim#include <machine/clock.h> 42193326Sed#include <machine/endian.h> 43221345Sdim#include <machine/pc/bios.h> 44221345Sdim#include <machine/cpufunc.h> 45221345Sdim#include <machine/segments.h> 46221345Sdim#include <machine/stdarg.h> 47193326Sed#include <machine/vm86.h> 48221345Sdim 49221345Sdim#include <machine/bus.h> 50221345Sdim#include <machine/resource.h> 51221345Sdim#include <sys/rman.h> 52221345Sdim 53221345Sdim#include <vm/vm.h> 54221345Sdim#include <vm/pmap.h> 55221345Sdim#include <vm/vm_param.h> 56221345Sdim 57221345Sdim#include <i386/bios/apm.h> 58221345Sdim 59221345Sdim/* Used by the apm_saver screen saver module */ 60221345Sdimint apm_display(int newstate); 61221345Sdimstruct apm_softc apm_softc; 62221345Sdim 63193326Sedstatic void apm_resume(void); 64221345Sdimstatic int apm_bioscall(void); 65221345Sdimstatic int apm_check_function_supported(u_int version, u_int func); 66221345Sdim 67221345Sdimstatic int apm_pm_func(u_long, void*, ...); 68221345Sdim 69221345Sdimstatic u_long apm_version; 70221345Sdim 71221345Sdimint apm_evindex; 72221345Sdim 73221345Sdim#define SCFLAG_ONORMAL 0x0000001 74193326Sed#define SCFLAG_OCTL 0x0000002 75221345Sdim#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 76221345Sdim 77221345Sdim#define APMDEV(dev) (minor(dev)&0x0f) 78221345Sdim#define APMDEV_NORMAL 0 79221345Sdim#define APMDEV_CTL 8 80221345Sdim 81198092Srdivacky#ifdef PC98 82221345Sdimextern int bios32_apm98(struct bios_regs *, u_int, u_short); 83221345Sdim 84221345Sdim/* PC98's SMM definition */ 85198092Srdivacky#define APM_NECSMM_PORT 0x6b8e 86221345Sdim#define APM_NECSMM_PORTSZ 1 87221345Sdim#define APM_NECSMM_EN 0x10 88221345Sdimstatic __inline void apm_enable_smm(struct apm_softc *); 89221345Sdimstatic __inline void apm_disable_smm(struct apm_softc *); 90221345Sdimint apm_necsmm_addr; 91221345Sdimu_int32_t apm_necsmm_mask; 92193326Sed#endif 93221345Sdim 94221345Sdimstatic struct apmhook *hook[NAPM_HOOK]; /* XXX */ 95193326Sed 96221345Sdim#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 97221345Sdim 98221345Sdim/* Map version number to integer (keeps ordering of version numbers) */ 99193326Sed#define INTVERSION(major, minor) ((major)*100 + (minor)) 100193326Sed 101198092Srdivackystatic struct callout_handle apm_timeout_ch = 102243830Sdim CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 103221345Sdim 104221345Sdimstatic timeout_t apm_timeout; 105221345Sdimstatic d_open_t apmopen; 106243830Sdimstatic d_close_t apmclose; 107221345Sdimstatic d_write_t apmwrite; 108221345Sdimstatic d_ioctl_t apmioctl; 109193326Sedstatic d_poll_t apmpoll; 110221345Sdim 111239462Sdimstatic struct cdevsw apm_cdevsw = { 112221345Sdim .d_version = D_VERSION, 113221345Sdim .d_flags = D_NEEDGIANT, 114221345Sdim .d_open = apmopen, 115239462Sdim .d_close = apmclose, 116243830Sdim .d_write = apmwrite, 117239462Sdim .d_ioctl = apmioctl, 118198092Srdivacky .d_poll = apmpoll, 119239462Sdim .d_name = "apm", 120221345Sdim}; 121221345Sdim 122221345Sdimstatic int apm_suspend_delay = 1; 123221345Sdimstatic int apm_standby_delay = 1; 124221345Sdimstatic int apm_swab_batt_minutes = 0; 125193326Sedstatic int apm_debug = 0; 126226633Sdim 127221345Sdim#define APM_DPRINT(args...) do { \ 128221345Sdim if (apm_debug) { \ 129221345Sdim printf(args); \ 130239462Sdim } \ 131239462Sdim} while (0) 132239462Sdim 133239462SdimSYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 134239462SdimSYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 135239462SdimSYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 136239462Sdim 137221345SdimTUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 138221345SdimSYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, 139198092Srdivacky &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 140239462Sdim 141198092Srdivacky#ifdef PC98 142221345Sdimstatic __inline void 143221345Sdimapm_enable_smm(sc) 144239462Sdim struct apm_softc *sc; 145239462Sdim{ 146239462Sdim bus_space_tag_t iot = sc->sc_iot; 147239462Sdim bus_space_handle_t ioh = sc->sc_ioh; 148239462Sdim if (apm_necsmm_addr != 0) 149239462Sdim bus_space_write_1(iot, ioh, 0, 150239462Sdim (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 151243830Sdim} 152221345Sdim 153198092Srdivackystatic __inline void 154239462Sdimapm_disable_smm(sc) 155221345Sdim struct apm_softc *sc; 156221345Sdim{ 157221345Sdim bus_space_tag_t iot = sc->sc_iot; 158221345Sdim bus_space_handle_t ioh = sc->sc_ioh; 159221345Sdim if (apm_necsmm_addr != 0) 160221345Sdim bus_space_write_1(iot, ioh, 0, 161221345Sdim (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 162221345Sdim} 163239462Sdim#endif 164226633Sdim 165239462Sdim/* 166239462Sdim * return 0 if the function successfull, 167239462Sdim * return 1 if the function unsuccessfull, 168226633Sdim * return -1 if the function unsupported. 169198092Srdivacky */ 170226633Sdimstatic int 171226633Sdimapm_bioscall(void) 172226633Sdim{ 173226633Sdim struct apm_softc *sc = &apm_softc; 174226633Sdim int errno = 0; 175226633Sdim u_int apm_func = sc->bios.r.eax & 0xff; 176226633Sdim 177226633Sdim if (!apm_check_function_supported(sc->intversion, apm_func)) { 178221345Sdim APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 179239462Sdim apm_func, sc->majorversion, sc->minorversion); 180221345Sdim return (-1); 181221345Sdim } 182221345Sdim 183239462Sdim sc->bios_busy = 1; 184221345Sdim#ifdef PC98 185221345Sdim set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 186221345Sdim if (bios32_apm98(&sc->bios.r, sc->bios.entry, 187221345Sdim GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 188193326Sed return 1; 189221345Sdim#else 190221345Sdim if (sc->connectmode == APM_PROT32CONNECT) { 191221345Sdim set_bios_selectors(&sc->bios.seg, 192193326Sed BIOSCODE_FLAG | BIOSDATA_FLAG); 193221345Sdim errno = bios32(&sc->bios.r, 194221345Sdim sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 195221345Sdim } else { 196221345Sdim errno = bios16(&sc->bios, NULL); 197221345Sdim } 198193326Sed#endif 199221345Sdim sc->bios_busy = 0; 200221345Sdim return (errno); 201221345Sdim} 202221345Sdim 203221345Sdim/* check whether APM function is supported (1) or not (0). */ 204221345Sdimstatic int 205226633Sdimapm_check_function_supported(u_int version, u_int func) 206221345Sdim{ 207221345Sdim /* except driver version */ 208221345Sdim if (func == APM_DRVVERSION) { 209221345Sdim return (1); 210221345Sdim } 211221345Sdim#ifdef PC98 212221345Sdim if (func == APM_GETPWSTATUS) { 213193326Sed return (1); 214193326Sed } 215221345Sdim#endif 216224145Sdim 217221345Sdim switch (version) { 218221345Sdim case INTVERSION(1, 0): 219224145Sdim if (func > APM_GETPMEVENT) { 220224145Sdim return (0); /* not supported */ 221224145Sdim } 222224145Sdim break; 223224145Sdim case INTVERSION(1, 1): 224193326Sed if (func > APM_ENGAGEDISENGAGEPM && 225224145Sdim func < APM_OEMFUNC) { 226224145Sdim return (0); /* not supported */ 227224145Sdim } 228224145Sdim break; 229224145Sdim case INTVERSION(1, 2): 230224145Sdim break; 231224145Sdim } 232193326Sed 233198092Srdivacky return (1); /* supported */ 234221345Sdim} 235221345Sdim 236221345Sdim/* enable/disable power management */ 237221345Sdimstatic int 238221345Sdimapm_enable_disable_pm(int enable) 239221345Sdim{ 240221345Sdim struct apm_softc *sc = &apm_softc; 241193326Sed 242193326Sed sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 243221345Sdim 244239462Sdim if (sc->intversion >= INTVERSION(1, 1)) 245221345Sdim sc->bios.r.ebx = PMDV_ALLDEV; 246198092Srdivacky else 247221345Sdim sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 248221345Sdim sc->bios.r.ecx = enable; 249221345Sdim sc->bios.r.edx = 0; 250221345Sdim return (apm_bioscall()); 251221345Sdim} 252239462Sdim 253239462Sdim/* register driver version (APM 1.1 or later) */ 254221345Sdimstatic int 255221345Sdimapm_driver_version(int version) 256221345Sdim{ 257239462Sdim struct apm_softc *sc = &apm_softc; 258239462Sdim 259239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 260239462Sdim sc->bios.r.ebx = 0x0; 261239462Sdim sc->bios.r.ecx = version; 262239462Sdim sc->bios.r.edx = 0; 263239462Sdim 264239462Sdim if (apm_bioscall() == 0 && sc->bios.r.eax == version) 265239462Sdim return (0); 266239462Sdim 267239462Sdim /* Some old BIOSes don't return the connection version in %ax. */ 268239462Sdim if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 269239462Sdim return (0); 270239462Sdim 271239462Sdim return (1); 272239462Sdim} 273239462Sdim 274239462Sdim/* engage/disengage power management (APM 1.1 or later) */ 275239462Sdimstatic int 276239462Sdimapm_engage_disengage_pm(int engage) 277239462Sdim{ 278239462Sdim struct apm_softc *sc = &apm_softc; 279239462Sdim 280239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 281239462Sdim sc->bios.r.ebx = PMDV_ALLDEV; 282239462Sdim sc->bios.r.ecx = engage; 283239462Sdim sc->bios.r.edx = 0; 284239462Sdim return (apm_bioscall()); 285239462Sdim} 286239462Sdim 287239462Sdim/* get PM event */ 288239462Sdimstatic u_int 289239462Sdimapm_getevent(void) 290239462Sdim{ 291239462Sdim struct apm_softc *sc = &apm_softc; 292239462Sdim 293239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 294239462Sdim 295239462Sdim sc->bios.r.ebx = 0; 296239462Sdim sc->bios.r.ecx = 0; 297239462Sdim sc->bios.r.edx = 0; 298239462Sdim if (apm_bioscall()) 299239462Sdim return (PMEV_NOEVENT); 300239462Sdim return (sc->bios.r.ebx & 0xffff); 301239462Sdim} 302239462Sdim 303239462Sdim/* suspend entire system */ 304239462Sdimstatic int 305239462Sdimapm_suspend_system(int state) 306239462Sdim{ 307239462Sdim struct apm_softc *sc = &apm_softc; 308239462Sdim 309239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 310239462Sdim sc->bios.r.ebx = PMDV_ALLDEV; 311239462Sdim sc->bios.r.ecx = state; 312239462Sdim sc->bios.r.edx = 0; 313239462Sdim 314239462Sdim#ifdef PC98 315239462Sdim apm_disable_smm(sc); 316239462Sdim#endif 317239462Sdim if (apm_bioscall()) { 318239462Sdim printf("Entire system suspend failure: errcode = %d\n", 319239462Sdim 0xff & (sc->bios.r.eax >> 8)); 320239462Sdim return 1; 321239462Sdim } 322239462Sdim#ifdef PC98 323239462Sdim apm_enable_smm(sc); 324239462Sdim#endif 325239462Sdim return 0; 326239462Sdim} 327239462Sdim 328239462Sdim/* Display control */ 329239462Sdim/* 330239462Sdim * Experimental implementation: My laptop machine can't handle this function 331239462Sdim * If your laptop can control the display via APM, please inform me. 332239462Sdim * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 333239462Sdim */ 334239462Sdimint 335239462Sdimapm_display(int newstate) 336239462Sdim{ 337239462Sdim struct apm_softc *sc = &apm_softc; 338239462Sdim 339239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 340239462Sdim sc->bios.r.ebx = PMDV_DISP0; 341239462Sdim sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 342239462Sdim sc->bios.r.edx = 0; 343239462Sdim if (apm_bioscall() == 0) { 344239462Sdim return 0; 345239462Sdim } 346239462Sdim 347239462Sdim /* If failed, then try to blank all display devices instead. */ 348239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 349239462Sdim sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 350239462Sdim sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 351239462Sdim sc->bios.r.edx = 0; 352239462Sdim if (apm_bioscall() == 0) { 353239462Sdim return 0; 354239462Sdim } 355239462Sdim printf("Display off failure: errcode = %d\n", 356239462Sdim 0xff & (sc->bios.r.eax >> 8)); 357239462Sdim return 1; 358239462Sdim} 359239462Sdim 360239462Sdim/* 361239462Sdim * Turn off the entire system. 362239462Sdim */ 363239462Sdimstatic void 364239462Sdimapm_power_off(void *junk, int howto) 365239462Sdim{ 366239462Sdim struct apm_softc *sc = &apm_softc; 367239462Sdim 368239462Sdim /* Not halting powering off, or not active */ 369239462Sdim if (!(howto & RB_POWEROFF) || !apm_softc.active) 370239462Sdim return; 371239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 372239462Sdim sc->bios.r.ebx = PMDV_ALLDEV; 373239462Sdim sc->bios.r.ecx = PMST_OFF; 374239462Sdim sc->bios.r.edx = 0; 375239462Sdim (void) apm_bioscall(); 376239462Sdim} 377239462Sdim 378239462Sdim/* APM Battery low handler */ 379239462Sdimstatic void 380239462Sdimapm_battery_low(void) 381239462Sdim{ 382239462Sdim printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 383239462Sdim} 384239462Sdim 385239462Sdim/* APM hook manager */ 386239462Sdimstatic struct apmhook * 387239462Sdimapm_add_hook(struct apmhook **list, struct apmhook *ah) 388239462Sdim{ 389239462Sdim int s; 390239462Sdim struct apmhook *p, *prev; 391239462Sdim 392239462Sdim APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 393239462Sdim 394239462Sdim s = splhigh(); 395239462Sdim if (ah == NULL) 396239462Sdim panic("illegal apm_hook!"); 397239462Sdim prev = NULL; 398239462Sdim for (p = *list; p != NULL; prev = p, p = p->ah_next) 399239462Sdim if (p->ah_order > ah->ah_order) 400239462Sdim break; 401239462Sdim 402239462Sdim if (prev == NULL) { 403239462Sdim ah->ah_next = *list; 404226633Sdim *list = ah; 405221345Sdim } else { 406221345Sdim ah->ah_next = prev->ah_next; 407239462Sdim prev->ah_next = ah; 408234353Sdim } 409239462Sdim splx(s); 410243830Sdim return ah; 411221345Sdim} 412239462Sdim 413221345Sdimstatic void 414221345Sdimapm_del_hook(struct apmhook **list, struct apmhook *ah) 415239462Sdim{ 416239462Sdim int s; 417226633Sdim struct apmhook *p, *prev; 418239462Sdim 419243830Sdim s = splhigh(); 420243830Sdim prev = NULL; 421221345Sdim for (p = *list; p != NULL; prev = p, p = p->ah_next) 422239462Sdim if (p == ah) 423239462Sdim goto deleteit; 424243830Sdim panic("Tried to delete unregistered apm_hook."); 425221345Sdim goto nosuchnode; 426239462Sdimdeleteit: 427243830Sdim if (prev != NULL) 428221345Sdim prev->ah_next = p->ah_next; 429243830Sdim else 430243830Sdim *list = p->ah_next; 431239462Sdimnosuchnode: 432221345Sdim splx(s); 433221345Sdim} 434193326Sed 435193326Sed 436239462Sdim/* APM driver calls some functions automatically */ 437239462Sdimstatic void 438239462Sdimapm_execute_hook(struct apmhook *list) 439239462Sdim{ 440239462Sdim struct apmhook *p; 441239462Sdim 442239462Sdim for (p = list; p != NULL; p = p->ah_next) { 443239462Sdim APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 444239462Sdim if ((*(p->ah_fun))(p->ah_arg)) 445239462Sdim printf("Warning: APM hook \"%s\" failed", p->ah_name); 446239462Sdim } 447239462Sdim} 448239462Sdim 449239462Sdim 450239462Sdim/* establish an apm hook */ 451239462Sdimstruct apmhook * 452239462Sdimapm_hook_establish(int apmh, struct apmhook *ah) 453239462Sdim{ 454239462Sdim if (apmh < 0 || apmh >= NAPM_HOOK) 455239462Sdim return NULL; 456239462Sdim 457239462Sdim return apm_add_hook(&hook[apmh], ah); 458239462Sdim} 459239462Sdim 460239462Sdim/* disestablish an apm hook */ 461239462Sdimvoid 462239462Sdimapm_hook_disestablish(int apmh, struct apmhook *ah) 463239462Sdim{ 464239462Sdim if (apmh < 0 || apmh >= NAPM_HOOK) 465239462Sdim return; 466239462Sdim 467239462Sdim apm_del_hook(&hook[apmh], ah); 468239462Sdim} 469239462Sdim 470239462Sdimstatic int apm_record_event(struct apm_softc *, u_int); 471239462Sdimstatic void apm_processevent(void); 472239462Sdim 473239462Sdimstatic u_int apm_op_inprog = 0; 474239462Sdim 475239462Sdimstatic void 476239462Sdimapm_do_suspend(void) 477239462Sdim{ 478239462Sdim struct apm_softc *sc = &apm_softc; 479239462Sdim int error; 480239462Sdim 481239462Sdim if (!sc) 482239462Sdim return; 483239462Sdim 484239462Sdim apm_op_inprog = 0; 485239462Sdim sc->suspends = sc->suspend_countdown = 0; 486239462Sdim 487239462Sdim if (sc->initialized) { 488239462Sdim error = DEVICE_SUSPEND(root_bus); 489239462Sdim if (error) { 490239462Sdim DEVICE_RESUME(root_bus); 491239462Sdim } else { 492239462Sdim apm_execute_hook(hook[APM_HOOK_SUSPEND]); 493239462Sdim if (apm_suspend_system(PMST_SUSPEND) == 0) { 494239462Sdim sc->suspending = 1; 495239462Sdim apm_processevent(); 496239462Sdim } else { 497239462Sdim /* Failure, 'resume' the system again */ 498239462Sdim apm_execute_hook(hook[APM_HOOK_RESUME]); 499239462Sdim DEVICE_RESUME(root_bus); 500239462Sdim } 501239462Sdim } 502239462Sdim } 503239462Sdim} 504239462Sdim 505239462Sdimstatic void 506239462Sdimapm_do_standby(void) 507239462Sdim{ 508239462Sdim struct apm_softc *sc = &apm_softc; 509239462Sdim 510239462Sdim if (!sc) 511239462Sdim return; 512239462Sdim 513239462Sdim apm_op_inprog = 0; 514239462Sdim sc->standbys = sc->standby_countdown = 0; 515239462Sdim 516239462Sdim if (sc->initialized) { 517239462Sdim /* 518239462Sdim * As far as standby, we don't need to execute 519239462Sdim * all of suspend hooks. 520239462Sdim */ 521239462Sdim if (apm_suspend_system(PMST_STANDBY) == 0) 522239462Sdim apm_processevent(); 523239462Sdim } 524239462Sdim} 525226633Sdim 526226633Sdimstatic void 527239462Sdimapm_lastreq_notify(void) 528239462Sdim{ 529239462Sdim struct apm_softc *sc = &apm_softc; 530239462Sdim 531239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 532239462Sdim sc->bios.r.ebx = PMDV_ALLDEV; 533239462Sdim sc->bios.r.ecx = PMST_LASTREQNOTIFY; 534239462Sdim sc->bios.r.edx = 0; 535239462Sdim apm_bioscall(); 536239462Sdim} 537239462Sdim 538239462Sdimstatic int 539239462Sdimapm_lastreq_rejected(void) 540239462Sdim{ 541239462Sdim struct apm_softc *sc = &apm_softc; 542239462Sdim 543239462Sdim if (apm_op_inprog == 0) { 544239462Sdim return 1; /* no operation in progress */ 545239462Sdim } 546239462Sdim 547239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 548239462Sdim sc->bios.r.ebx = PMDV_ALLDEV; 549239462Sdim sc->bios.r.ecx = PMST_LASTREQREJECT; 550239462Sdim sc->bios.r.edx = 0; 551239462Sdim 552239462Sdim if (apm_bioscall()) { 553239462Sdim APM_DPRINT("apm_lastreq_rejected: failed\n"); 554239462Sdim return 1; 555239462Sdim } 556239462Sdim apm_op_inprog = 0; 557239462Sdim return 0; 558239462Sdim} 559239462Sdim 560239462Sdim/* 561239462Sdim * Public interface to the suspend/resume: 562239462Sdim * 563239462Sdim * Execute suspend and resume hook before and after sleep, respectively. 564239462Sdim * 565239462Sdim */ 566239462Sdim 567239462Sdimvoid 568239462Sdimapm_suspend(int state) 569226633Sdim{ 570239462Sdim struct apm_softc *sc = &apm_softc; 571226633Sdim 572226633Sdim if (!sc->initialized) 573239462Sdim return; 574239462Sdim 575239462Sdim switch (state) { 576239462Sdim case PMST_SUSPEND: 577239462Sdim if (sc->suspends) 578239462Sdim return; 579193326Sed sc->suspends++; 580198092Srdivacky sc->suspend_countdown = apm_suspend_delay; 581239462Sdim break; 582193326Sed case PMST_STANDBY: 583239462Sdim if (sc->standbys) 584239462Sdim return; 585239462Sdim sc->standbys++; 586239462Sdim sc->standby_countdown = apm_standby_delay; 587193326Sed break; 588221345Sdim default: 589198092Srdivacky printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 590221345Sdim return; 591221345Sdim } 592221345Sdim 593221345Sdim apm_op_inprog++; 594221345Sdim apm_lastreq_notify(); 595221345Sdim} 596221345Sdim 597221345Sdimstatic void 598221345Sdimapm_resume(void) 599221345Sdim{ 600221345Sdim struct apm_softc *sc = &apm_softc; 601239462Sdim 602221345Sdim if (!sc) 603193326Sed return; 604198092Srdivacky 605239462Sdim if (sc->suspending == 0) 606243830Sdim return; 607243830Sdim 608243830Sdim sc->suspending = 0; 609243830Sdim if (sc->initialized) { 610243830Sdim apm_execute_hook(hook[APM_HOOK_RESUME]); 611243830Sdim DEVICE_RESUME(root_bus); 612243830Sdim } 613243830Sdim} 614243830Sdim 615243830Sdim 616243830Sdim/* get power status per battery */ 617243830Sdimstatic int 618243830Sdimapm_get_pwstatus(apm_pwstatus_t app) 619243830Sdim{ 620243830Sdim struct apm_softc *sc = &apm_softc; 621243830Sdim 622243830Sdim if (app->ap_device != PMDV_ALLDEV && 623243830Sdim (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 624243830Sdim return 1; 625243830Sdim 626226633Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 627226633Sdim sc->bios.r.ebx = app->ap_device; 628239462Sdim sc->bios.r.ecx = 0; 629239462Sdim sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 630239462Sdim 631239462Sdim if (apm_bioscall()) 632239462Sdim return 1; 633239462Sdim 634239462Sdim app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 635239462Sdim app->ap_batt_stat = sc->bios.r.ebx & 0xff; 636239462Sdim app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 637239462Sdim app->ap_batt_life = sc->bios.r.ecx & 0xff; 638239462Sdim sc->bios.r.edx &= 0xffff; 639239462Sdim if (apm_swab_batt_minutes) 640239462Sdim sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 641239462Sdim if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 642221345Sdim app->ap_batt_time = -1; 643221345Sdim else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 644193326Sed app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 645239462Sdim else /* Time is in seconds */ 646239462Sdim app->ap_batt_time = sc->bios.r.edx; 647239462Sdim 648239462Sdim return 0; 649239462Sdim} 650221345Sdim 651221345Sdim 652198092Srdivacky/* get APM information */ 653239462Sdimstatic int 654239462Sdimapm_get_info(apm_info_t aip) 655239462Sdim{ 656239462Sdim struct apm_softc *sc = &apm_softc; 657239462Sdim struct apm_pwstatus aps; 658239462Sdim 659239462Sdim bzero(&aps, sizeof(aps)); 660239462Sdim aps.ap_device = PMDV_ALLDEV; 661239462Sdim if (apm_get_pwstatus(&aps)) 662239462Sdim return 1; 663239462Sdim 664239462Sdim aip->ai_infoversion = 1; 665239462Sdim aip->ai_acline = aps.ap_acline; 666239462Sdim aip->ai_batt_stat = aps.ap_batt_stat; 667239462Sdim aip->ai_batt_life = aps.ap_batt_life; 668239462Sdim aip->ai_batt_time = aps.ap_batt_time; 669239462Sdim aip->ai_major = (u_int)sc->majorversion; 670239462Sdim aip->ai_minor = (u_int)sc->minorversion; 671239462Sdim aip->ai_status = (u_int)sc->active; 672239462Sdim 673239462Sdim sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 674239462Sdim sc->bios.r.ebx = 0; 675239462Sdim sc->bios.r.ecx = 0; 676239462Sdim sc->bios.r.edx = 0; 677239462Sdim if (apm_bioscall()) { 678239462Sdim aip->ai_batteries = 0xffffffff; /* Unknown */ 679239462Sdim aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 680239462Sdim } else { 681239462Sdim aip->ai_batteries = sc->bios.r.ebx & 0xff; 682239462Sdim aip->ai_capabilities = sc->bios.r.ecx & 0xff; 683239462Sdim } 684239462Sdim 685221345Sdim bzero(aip->ai_spare, sizeof aip->ai_spare); 686221345Sdim 687221345Sdim return 0; 688193326Sed} 689198092Srdivacky 690243830Sdim 691243830Sdim/* inform APM BIOS that CPU is idle */ 692243830Sdimvoid 693243830Sdimapm_cpu_idle(void) 694243830Sdim{ 695243830Sdim struct apm_softc *sc = &apm_softc; 696243830Sdim 697243830Sdim if (sc->active) { 698221345Sdim 699221345Sdim sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 700221345Sdim sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 701193326Sed (void) apm_bioscall(); 702221345Sdim } 703234353Sdim /* 704239462Sdim * Some APM implementation halts CPU in BIOS, whenever 705221345Sdim * "CPU-idle" function are invoked, but swtch() of 706226633Sdim * FreeBSD halts CPU, therefore, CPU is halted twice 707221345Sdim * in the sched loop. It makes the interrupt latency 708221345Sdim * terribly long and be able to cause a serious problem 709239462Sdim * in interrupt processing. We prevent it by removing 710221345Sdim * "hlt" operation from swtch() and managed it under 711221345Sdim * APM driver. 712221345Sdim */ 713226633Sdim if (!sc->active || sc->always_halt_cpu) 714226633Sdim halt(); /* wait for interrupt */ 715239462Sdim} 716226633Sdim 717226633Sdim/* inform APM BIOS that CPU is busy */ 718221345Sdimvoid 719221345Sdimapm_cpu_busy(void) 720239462Sdim{ 721221345Sdim struct apm_softc *sc = &apm_softc; 722221345Sdim 723221345Sdim /* 724226633Sdim * The APM specification says this is only necessary if your BIOS 725221345Sdim * slows down the processor in the idle task, otherwise it's not 726221345Sdim * necessary. 727221345Sdim */ 728221345Sdim if (sc->slow_idle_cpu && sc->active) { 729198092Srdivacky 730224145Sdim sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 731224145Sdim sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 732224145Sdim apm_bioscall(); 733234353Sdim } 734224145Sdim} 735224145Sdim 736221345Sdim 737221345Sdim/* 738221345Sdim * APM timeout routine: 739221345Sdim * 740198092Srdivacky * This routine is automatically called by timer once per second. 741224145Sdim */ 742224145Sdim 743239462Sdimstatic void 744239462Sdimapm_timeout(void *dummy) 745239462Sdim{ 746239462Sdim struct apm_softc *sc = &apm_softc; 747221345Sdim 748221345Sdim if (apm_op_inprog) 749239462Sdim apm_lastreq_notify(); 750239462Sdim 751239462Sdim if (sc->standbys && sc->standby_countdown-- <= 0) 752239462Sdim apm_do_standby(); 753221345Sdim 754193326Sed if (sc->suspends && sc->suspend_countdown-- <= 0) 755221345Sdim apm_do_suspend(); 756221345Sdim 757221345Sdim if (!sc->bios_busy) 758221345Sdim apm_processevent(); 759221345Sdim 760226633Sdim if (sc->active == 1) 761198092Srdivacky /* Run slightly more oftan than 1 Hz */ 762221345Sdim apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1); 763221345Sdim} 764239462Sdim 765239462Sdim/* enable APM BIOS */ 766224145Sdimstatic void 767221345Sdimapm_event_enable(void) 768221345Sdim{ 769221345Sdim struct apm_softc *sc = &apm_softc; 770193326Sed 771221345Sdim APM_DPRINT("called apm_event_enable()\n"); 772221345Sdim if (sc->initialized) { 773221345Sdim sc->active = 1; 774226633Sdim apm_timeout(sc); 775226633Sdim } 776239462Sdim} 777224145Sdim 778224145Sdim/* disable APM BIOS */ 779221345Sdimstatic void 780221345Sdimapm_event_disable(void) 781193326Sed{ 782221345Sdim struct apm_softc *sc = &apm_softc; 783 784 APM_DPRINT("called apm_event_disable()\n"); 785 if (sc->initialized) { 786 untimeout(apm_timeout, NULL, apm_timeout_ch); 787 sc->active = 0; 788 } 789} 790 791/* halt CPU in scheduling loop */ 792static void 793apm_halt_cpu(void) 794{ 795 struct apm_softc *sc = &apm_softc; 796 797 if (sc->initialized) 798 sc->always_halt_cpu = 1; 799} 800 801/* don't halt CPU in scheduling loop */ 802static void 803apm_not_halt_cpu(void) 804{ 805 struct apm_softc *sc = &apm_softc; 806 807 if (sc->initialized) 808 sc->always_halt_cpu = 0; 809} 810 811/* device driver definitions */ 812 813/* 814 * Module event 815 */ 816 817static int 818apm_modevent(struct module *mod, int event, void *junk) 819{ 820 821 switch (event) { 822 case MOD_LOAD: 823 if (!cold) 824 return (EPERM); 825 break; 826 case MOD_UNLOAD: 827 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 828 return (EBUSY); 829 break; 830 default: 831 break; 832 } 833 834 return (0); 835} 836 837/* 838 * Create "connection point" 839 */ 840static void 841apm_identify(driver_t *driver, device_t parent) 842{ 843 device_t child; 844 845 if (!cold) { 846 printf("Don't load this driver from userland!!\n"); 847 return; 848 } 849 850 if (resource_disabled("apm", 0)) 851 return; 852 853 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 854 if (child == NULL) 855 panic("apm_identify"); 856} 857 858/* 859 * probe for APM BIOS 860 */ 861static int 862apm_probe(device_t dev) 863{ 864#define APM_KERNBASE KERNBASE 865 struct vm86frame vmf; 866 struct apm_softc *sc = &apm_softc; 867#ifdef PC98 868 int rid; 869#endif 870 871 device_set_desc(dev, "APM BIOS"); 872 if (device_get_unit(dev) > 0) { 873 printf("apm: Only one APM driver supported.\n"); 874 return ENXIO; 875 } 876 877 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 878 power_pm_get_type() != POWER_PM_TYPE_APM) { 879 printf("apm: Other PM system enabled.\n"); 880 return ENXIO; 881 } 882 883 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 884 bzero(&apm_softc, sizeof(apm_softc)); 885 vmf.vmf_ah = APM_BIOS; 886 vmf.vmf_al = APM_INSTCHECK; 887 vmf.vmf_bx = 0; 888 if (vm86_intcall(APM_INT, &vmf)) 889 return ENXIO; /* APM not found */ 890 if (vmf.vmf_bx != 0x504d) { 891 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 892 return ENXIO; 893 } 894 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 895 printf("apm: protected mode connections are not supported\n"); 896 return ENXIO; 897 } 898 899 apm_version = vmf.vmf_ax; 900 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 901 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 902 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 903 904 vmf.vmf_ah = APM_BIOS; 905 vmf.vmf_al = APM_DISCONNECT; 906 vmf.vmf_bx = 0; 907 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 908 909#ifdef PC98 910 /* PC98 have bogos APM 32bit BIOS */ 911 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 912 return ENXIO; 913 rid = 0; 914 bus_set_resource(dev, SYS_RES_IOPORT, rid, 915 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 916 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 917 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 918 if (sc->sc_res == NULL) { 919 printf("apm: cannot open NEC smm device\n"); 920 return ENXIO; 921 } 922 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 923 924 vmf.vmf_ah = APM_BIOS; 925 vmf.vmf_al = APM_PROT32CONNECT; 926 vmf.vmf_bx = 0; 927 if (vm86_intcall(APM_INT, &vmf)) { 928 printf("apm: 32-bit connection error.\n"); 929 return (ENXIO); 930 } 931 932 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 933 sc->bios.seg.code32.limit = 0xffff; 934 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 935 sc->bios.seg.code16.limit = 0xffff; 936 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 937 sc->bios.seg.data.limit = 0xffff; 938 sc->bios.entry = vmf.vmf_ebx; 939 sc->connectmode = APM_PROT32CONNECT; 940#else 941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 942 vmf.vmf_ah = APM_BIOS; 943 vmf.vmf_al = APM_PROT32CONNECT; 944 vmf.vmf_bx = 0; 945 if (vm86_intcall(APM_INT, &vmf)) { 946 printf("apm: 32-bit connection error.\n"); 947 return (ENXIO); 948 } 949 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 950 sc->bios.seg.code32.limit = 0xffff; 951 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 952 sc->bios.seg.code16.limit = 0xffff; 953 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 954 sc->bios.seg.data.limit = 0xffff; 955 sc->bios.entry = vmf.vmf_ebx; 956 sc->connectmode = APM_PROT32CONNECT; 957 } else { 958 /* use 16-bit connection */ 959 vmf.vmf_ah = APM_BIOS; 960 vmf.vmf_al = APM_PROT16CONNECT; 961 vmf.vmf_bx = 0; 962 if (vm86_intcall(APM_INT, &vmf)) { 963 printf("apm: 16-bit connection error.\n"); 964 return (ENXIO); 965 } 966 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 967 sc->bios.seg.code16.limit = 0xffff; 968 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 969 sc->bios.seg.data.limit = 0xffff; 970 sc->bios.entry = vmf.vmf_bx; 971 sc->connectmode = APM_PROT16CONNECT; 972 } 973#endif 974 return(0); 975} 976 977 978/* 979 * return 0 if the user will notice and handle the event, 980 * return 1 if the kernel driver should do so. 981 */ 982static int 983apm_record_event(struct apm_softc *sc, u_int event_type) 984{ 985 struct apm_event_info *evp; 986 987 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 988 return 1; /* no user waiting */ 989 if (sc->event_count == APM_NEVENTS) 990 return 1; /* overflow */ 991 if (sc->event_filter[event_type] == 0) 992 return 1; /* not registered */ 993 evp = &sc->event_list[sc->event_ptr]; 994 sc->event_count++; 995 sc->event_ptr++; 996 sc->event_ptr %= APM_NEVENTS; 997 evp->type = event_type; 998 evp->index = ++apm_evindex; 999 selwakeuppri(&sc->sc_rsel, PZERO); 1000 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1001} 1002 1003/* Power profile */ 1004static void 1005apm_power_profile(struct apm_softc *sc) 1006{ 1007 int state; 1008 struct apm_info info; 1009 static int apm_acline = 0; 1010 1011 if (apm_get_info(&info)) 1012 return; 1013 1014 if (apm_acline != info.ai_acline) { 1015 apm_acline = info.ai_acline; 1016 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1017 power_profile_set_state(state); 1018 } 1019} 1020 1021/* Process APM event */ 1022static void 1023apm_processevent(void) 1024{ 1025 int apm_event; 1026 struct apm_softc *sc = &apm_softc; 1027 1028#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1029 APM_DPRINT("Received APM Event: " #symbol "\n"); 1030 1031 do { 1032 apm_event = apm_getevent(); 1033 switch (apm_event) { 1034 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1035 if (apm_op_inprog == 0) { 1036 apm_op_inprog++; 1037 if (apm_record_event(sc, apm_event)) { 1038 apm_suspend(PMST_STANDBY); 1039 } 1040 } 1041 break; 1042 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1043 if (apm_op_inprog == 0) { 1044 apm_op_inprog++; 1045 if (apm_record_event(sc, apm_event)) { 1046 apm_suspend(PMST_STANDBY); 1047 } 1048 } 1049 break; 1050 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1051 apm_lastreq_notify(); 1052 if (apm_op_inprog == 0) { 1053 apm_op_inprog++; 1054 if (apm_record_event(sc, apm_event)) { 1055 apm_do_suspend(); 1056 } 1057 } 1058 return; /* XXX skip the rest */ 1059 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1060 apm_lastreq_notify(); 1061 if (apm_op_inprog == 0) { 1062 apm_op_inprog++; 1063 if (apm_record_event(sc, apm_event)) { 1064 apm_do_suspend(); 1065 } 1066 } 1067 return; /* XXX skip the rest */ 1068 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1069 apm_do_suspend(); 1070 break; 1071 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1072 apm_record_event(sc, apm_event); 1073 apm_resume(); 1074 break; 1075 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1076 apm_record_event(sc, apm_event); 1077 apm_resume(); 1078 break; 1079 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1080 apm_record_event(sc, apm_event); 1081 break; 1082 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1083 if (apm_record_event(sc, apm_event)) { 1084 apm_battery_low(); 1085 apm_suspend(PMST_SUSPEND); 1086 } 1087 break; 1088 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1089 apm_record_event(sc, apm_event); 1090 apm_power_profile(sc); 1091 break; 1092 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1093 apm_record_event(sc, apm_event); 1094 inittodr(0); /* adjust time to RTC */ 1095 break; 1096 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1097 apm_record_event(sc, apm_event); 1098 apm_power_profile(sc); 1099 break; 1100 case PMEV_NOEVENT: 1101 break; 1102 default: 1103 printf("Unknown Original APM Event 0x%x\n", apm_event); 1104 break; 1105 } 1106 } while (apm_event != PMEV_NOEVENT); 1107#ifdef PC98 1108 apm_disable_smm(sc); 1109#endif 1110} 1111 1112/* 1113 * Attach APM: 1114 * 1115 * Initialize APM driver 1116 */ 1117 1118static int 1119apm_attach(device_t dev) 1120{ 1121 struct apm_softc *sc = &apm_softc; 1122 int drv_version; 1123#ifdef PC98 1124 int rid; 1125#endif 1126 1127 if (device_get_flags(dev) & 0x20) 1128 statclock_disable = 1; 1129 1130 sc->initialized = 0; 1131 1132 /* Must be externally enabled */ 1133 sc->active = 0; 1134 1135 /* Always call HLT in idle loop */ 1136 sc->always_halt_cpu = 1; 1137 1138 getenv_int("debug.apm_debug", &apm_debug); 1139 1140 /* print bootstrap messages */ 1141 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1142 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1143 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1144 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1145 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1146 is_enabled(!sc->disabled)); 1147 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1148 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1149 1150#ifdef PC98 1151 rid = 0; 1152 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1153 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1154 if (sc->sc_res == NULL) 1155 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1156 sc->sc_iot = rman_get_bustag(sc->sc_res); 1157 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1158 1159 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1160 apm_necsmm_addr = APM_NECSMM_PORT; 1161 else 1162 apm_necsmm_addr = 0; 1163 apm_necsmm_mask = ~APM_NECSMM_EN; 1164#endif /* PC98 */ 1165 1166 /* 1167 * In one test, apm bios version was 1.02; an attempt to register 1168 * a 1.04 driver resulted in a 1.00 connection! Registering a 1169 * 1.02 driver resulted in a 1.02 connection. 1170 */ 1171 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1172 for (; drv_version > 0x100; drv_version--) 1173 if (apm_driver_version(drv_version) == 0) 1174 break; 1175 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1176 ((drv_version & 0x000f) >> 0); 1177 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1178 ((apm_version & 0x0f00) >> 8); 1179 1180 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1181 1182 if (sc->intversion >= INTVERSION(1, 1)) 1183 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1184 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1185 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1186 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1187 sc->majorversion, sc->minorversion); 1188 1189 1190 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1191 /* enable power management */ 1192 if (sc->disabled) { 1193 if (apm_enable_disable_pm(1)) { 1194 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1195 (sc->bios.r.eax >> 8) & 0xff); 1196 } 1197 } 1198 1199 /* engage power managment (APM 1.1 or later) */ 1200 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1201 if (apm_engage_disengage_pm(1)) { 1202 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1203 (sc->bios.r.eax >> 8) & 0xff); 1204 APM_DPRINT(" (Docked or using external power?).\n"); 1205 } 1206 } 1207 1208 /* Power the system off using APM */ 1209 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1210 SHUTDOWN_PRI_LAST); 1211 1212 /* Register APM again to pass the correct argument of pm_func. */ 1213 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1214 1215 sc->initialized = 1; 1216 sc->suspending = 0; 1217 1218 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1219 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1220 return 0; 1221} 1222 1223static int 1224apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1225{ 1226 struct apm_softc *sc = &apm_softc; 1227 int ctl = APMDEV(dev); 1228 1229 if (!sc->initialized) 1230 return (ENXIO); 1231 1232 switch (ctl) { 1233 case APMDEV_CTL: 1234 if (!(flag & FWRITE)) 1235 return EINVAL; 1236 if (sc->sc_flags & SCFLAG_OCTL) 1237 return EBUSY; 1238 sc->sc_flags |= SCFLAG_OCTL; 1239 bzero(sc->event_filter, sizeof sc->event_filter); 1240 break; 1241 case APMDEV_NORMAL: 1242 sc->sc_flags |= SCFLAG_ONORMAL; 1243 break; 1244 default: 1245 return ENXIO; 1246 break; 1247 } 1248 return 0; 1249} 1250 1251static int 1252apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1253{ 1254 struct apm_softc *sc = &apm_softc; 1255 int ctl = APMDEV(dev); 1256 1257 switch (ctl) { 1258 case APMDEV_CTL: 1259 apm_lastreq_rejected(); 1260 sc->sc_flags &= ~SCFLAG_OCTL; 1261 bzero(sc->event_filter, sizeof sc->event_filter); 1262 break; 1263 case APMDEV_NORMAL: 1264 sc->sc_flags &= ~SCFLAG_ONORMAL; 1265 break; 1266 } 1267 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1268 sc->event_count = 0; 1269 sc->event_ptr = 0; 1270 } 1271 return 0; 1272} 1273 1274static int 1275apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1276{ 1277 struct apm_softc *sc = &apm_softc; 1278 struct apm_bios_arg *args; 1279 int error = 0; 1280 int ret; 1281 int newstate; 1282 1283 if (!sc->initialized) 1284 return (ENXIO); 1285 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1286 switch (cmd) { 1287 case APMIO_SUSPEND: 1288 if (!(flag & FWRITE)) 1289 return (EPERM); 1290 if (sc->active) 1291 apm_suspend(PMST_SUSPEND); 1292 else 1293 error = EINVAL; 1294 break; 1295 1296 case APMIO_STANDBY: 1297 if (!(flag & FWRITE)) 1298 return (EPERM); 1299 if (sc->active) 1300 apm_suspend(PMST_STANDBY); 1301 else 1302 error = EINVAL; 1303 break; 1304 1305 case APMIO_GETINFO_OLD: 1306 { 1307 struct apm_info info; 1308 apm_info_old_t aiop; 1309 1310 if (apm_get_info(&info)) 1311 error = ENXIO; 1312 aiop = (apm_info_old_t)addr; 1313 aiop->ai_major = info.ai_major; 1314 aiop->ai_minor = info.ai_minor; 1315 aiop->ai_acline = info.ai_acline; 1316 aiop->ai_batt_stat = info.ai_batt_stat; 1317 aiop->ai_batt_life = info.ai_batt_life; 1318 aiop->ai_status = info.ai_status; 1319 } 1320 break; 1321 case APMIO_GETINFO: 1322 if (apm_get_info((apm_info_t)addr)) 1323 error = ENXIO; 1324 break; 1325 case APMIO_GETPWSTATUS: 1326 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1327 error = ENXIO; 1328 break; 1329 case APMIO_ENABLE: 1330 if (!(flag & FWRITE)) 1331 return (EPERM); 1332 apm_event_enable(); 1333 break; 1334 case APMIO_DISABLE: 1335 if (!(flag & FWRITE)) 1336 return (EPERM); 1337 apm_event_disable(); 1338 break; 1339 case APMIO_HALTCPU: 1340 if (!(flag & FWRITE)) 1341 return (EPERM); 1342 apm_halt_cpu(); 1343 break; 1344 case APMIO_NOTHALTCPU: 1345 if (!(flag & FWRITE)) 1346 return (EPERM); 1347 apm_not_halt_cpu(); 1348 break; 1349 case APMIO_DISPLAY: 1350 if (!(flag & FWRITE)) 1351 return (EPERM); 1352 newstate = *(int *)addr; 1353 if (apm_display(newstate)) 1354 error = ENXIO; 1355 break; 1356 case APMIO_BIOS: 1357 if (!(flag & FWRITE)) 1358 return (EPERM); 1359 /* XXX compatibility with the old interface */ 1360 args = (struct apm_bios_arg *)addr; 1361 sc->bios.r.eax = args->eax; 1362 sc->bios.r.ebx = args->ebx; 1363 sc->bios.r.ecx = args->ecx; 1364 sc->bios.r.edx = args->edx; 1365 sc->bios.r.esi = args->esi; 1366 sc->bios.r.edi = args->edi; 1367 if ((ret = apm_bioscall())) { 1368 /* 1369 * Return code 1 means bios call was unsuccessful. 1370 * Error code is stored in %ah. 1371 * Return code -1 means bios call was unsupported 1372 * in the APM BIOS version. 1373 */ 1374 if (ret == -1) { 1375 error = EINVAL; 1376 } 1377 } else { 1378 /* 1379 * Return code 0 means bios call was successful. 1380 * We need only %al and can discard %ah. 1381 */ 1382 sc->bios.r.eax &= 0xff; 1383 } 1384 args->eax = sc->bios.r.eax; 1385 args->ebx = sc->bios.r.ebx; 1386 args->ecx = sc->bios.r.ecx; 1387 args->edx = sc->bios.r.edx; 1388 args->esi = sc->bios.r.esi; 1389 args->edi = sc->bios.r.edi; 1390 break; 1391 default: 1392 error = EINVAL; 1393 break; 1394 } 1395 1396 /* for /dev/apmctl */ 1397 if (APMDEV(dev) == APMDEV_CTL) { 1398 struct apm_event_info *evp; 1399 int i; 1400 1401 error = 0; 1402 switch (cmd) { 1403 case APMIO_NEXTEVENT: 1404 if (!sc->event_count) { 1405 error = EAGAIN; 1406 } else { 1407 evp = (struct apm_event_info *)addr; 1408 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1409 i %= APM_NEVENTS; 1410 *evp = sc->event_list[i]; 1411 sc->event_count--; 1412 } 1413 break; 1414 case APMIO_REJECTLASTREQ: 1415 if (apm_lastreq_rejected()) { 1416 error = EINVAL; 1417 } 1418 break; 1419 default: 1420 error = EINVAL; 1421 break; 1422 } 1423 } 1424 1425 return error; 1426} 1427 1428static int 1429apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1430{ 1431 struct apm_softc *sc = &apm_softc; 1432 u_int event_type; 1433 int error; 1434 u_char enabled; 1435 1436 if (APMDEV(dev) != APMDEV_CTL) 1437 return(ENODEV); 1438 if (uio->uio_resid != sizeof(u_int)) 1439 return(E2BIG); 1440 1441 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1442 return(error); 1443 1444 if (event_type < 0 || event_type >= APM_NPMEV) 1445 return(EINVAL); 1446 1447 if (sc->event_filter[event_type] == 0) { 1448 enabled = 1; 1449 } else { 1450 enabled = 0; 1451 } 1452 sc->event_filter[event_type] = enabled; 1453 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1454 1455 return uio->uio_resid; 1456} 1457 1458static int 1459apmpoll(struct cdev *dev, int events, struct thread *td) 1460{ 1461 struct apm_softc *sc = &apm_softc; 1462 int revents = 0; 1463 1464 if (events & (POLLIN | POLLRDNORM)) { 1465 if (sc->event_count) { 1466 revents |= events & (POLLIN | POLLRDNORM); 1467 } else { 1468 selrecord(td, &sc->sc_rsel); 1469 } 1470 } 1471 1472 return (revents); 1473} 1474 1475static device_method_t apm_methods[] = { 1476 /* Device interface */ 1477 DEVMETHOD(device_identify, apm_identify), 1478 DEVMETHOD(device_probe, apm_probe), 1479 DEVMETHOD(device_attach, apm_attach), 1480 1481 { 0, 0 } 1482}; 1483 1484static driver_t apm_driver = { 1485 "apm", 1486 apm_methods, 1487 1, /* no softc (XXX) */ 1488}; 1489 1490static devclass_t apm_devclass; 1491 1492DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1493MODULE_VERSION(apm, 1); 1494 1495static int 1496apm_pm_func(u_long cmd, void *arg, ...) 1497{ 1498 int state, apm_state; 1499 int error; 1500 va_list ap; 1501 1502 error = 0; 1503 switch (cmd) { 1504 case POWER_CMD_SUSPEND: 1505 va_start(ap, arg); 1506 state = va_arg(ap, int); 1507 va_end(ap); 1508 1509 switch (state) { 1510 case POWER_SLEEP_STATE_STANDBY: 1511 apm_state = PMST_STANDBY; 1512 break; 1513 case POWER_SLEEP_STATE_SUSPEND: 1514 case POWER_SLEEP_STATE_HIBERNATE: 1515 apm_state = PMST_SUSPEND; 1516 break; 1517 default: 1518 error = EINVAL; 1519 goto out; 1520 } 1521 1522 apm_suspend(apm_state); 1523 break; 1524 1525 default: 1526 error = EINVAL; 1527 goto out; 1528 } 1529 1530out: 1531 return (error); 1532} 1533 1534static void 1535apm_pm_register(void *arg) 1536{ 1537 1538 if (!resource_disabled("apm", 0)) 1539 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1540} 1541 1542SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1543