627 lines
14 KiB
C
627 lines
14 KiB
C
#define APM_DEBUG 1
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/*
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* LP (Laptop Package)
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*
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* Copyright (c) 1994 by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
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*
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* This software may be used, modified, copied, and distributed, in
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* both source and binary form provided that the above copyright and
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* these terms are retained. Under no circumstances is the author
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* responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with its
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* use.
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*
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* Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
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*
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* $Id: apm.c,v 1.9 1994/12/16 07:09:22 phk Exp $
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*/
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#include "apm.h"
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#if NAPM > 0
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#include <sys/param.h>
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#include "conf.h"
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include "i386/isa/isa.h"
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#include "i386/isa/isa_device.h"
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#include <machine/apm_bios.h>
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#include <machine/segments.h>
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#include <machine/clock.h>
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#include <vm/vm.h>
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#include <sys/syslog.h>
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#include "apm_setup.h"
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/* static data */
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static int apm_initialized = 0, active = 0, halt_cpu = 1;
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static u_int minorversion, majorversion;
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static u_int cs32_base, cs16_base, ds_base;
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static u_int cs_limit, ds_limit;
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static u_int cs_entry;
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static u_int intversion;
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static int idle_cpu, disabled, disengaged;
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#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
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/* Map version number to integer (keeps ordering of version numbers) */
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#define INTVERSION(major, minor) ((major)*100 + (minor))
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static timeout_t apm_timeout;
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/* setup APM GDT discriptors */
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static void
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setup_apm_gdt(u_int code32_base, u_int code16_base, u_int data_base, u_int code_limit, u_int data_limit)
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{
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/* setup 32bit code segment */
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gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base;
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gdt_segs[GAPMCODE32_SEL].ssd_limit = code_limit;
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/* setup 16bit code segment */
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gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base;
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gdt_segs[GAPMCODE16_SEL].ssd_limit = code_limit;
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/* setup data segment */
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gdt_segs[GAPMDATA_SEL ].ssd_base = data_base;
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gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit;
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/* reflect these changes on physical GDT */
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ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd);
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ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd);
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ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd);
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}
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/* 48bit far pointer */
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struct addr48 {
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u_long offset;
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u_short segment;
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} apm_addr;
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int apm_errno;
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inline
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int
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apm_int(u_long *eax,u_long *ebx,u_long *ecx)
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{
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u_long cf;
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__asm ("pushl %%ebp
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pushl %%edx
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pushl %%esi
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xorl %3,%3
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movl %3,%%esi
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lcall _apm_addr
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jnc 1f
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incl %3
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1:
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popl %%esi
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popl %%edx
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popl %%ebp"
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: "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=D" (cf)
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: "0" (*eax), "1" (*ebx), "2" (*ecx)
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);
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apm_errno = ((*eax) >> 8) & 0xff;
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return cf;
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}
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/* enable/disable power management */
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static int
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apm_enable_disable_pm(int enable)
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{
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u_long eax,ebx,ecx;
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eax = (APM_BIOS<<8) | APM_ENABLEDISABLEPM;
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if (intversion >= INTVERSION(1, 1)) {
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ebx = PMDV_ALLDEV;
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} else {
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ebx = 0xffff; /* APM version 1.0 only */
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}
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ecx = enable;
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return apm_int(&eax,&ebx,&ecx);
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}
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/* Tell APM-BIOS that WE will do 1.1 and see what they say... */
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static void
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apm_driver_version()
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{
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u_long eax,ebx,ecx,i;
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#ifdef APM_DEBUG
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eax = (APM_BIOS<<8) | APM_INSTCHECK;
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ebx = 0x0;
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ecx = 0x0101;
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i = apm_int(&eax,&ebx,&ecx);
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printf("[%04lx %04lx %04lx %ld %02x]\n",
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eax,ebx,ecx,i,apm_errno);
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#endif
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eax = (APM_BIOS<<8) | APM_DRVVERSION;
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ebx = 0x0;
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ecx = 0x0101;
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if(!apm_int(&eax,&ebx,&ecx))
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apm_version = eax & 0xffff;
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#ifdef APM_DEBUG
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eax = (APM_BIOS<<8) | APM_INSTCHECK;
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ebx = 0x0;
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ecx = 0x0101;
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i = apm_int(&eax,&ebx,&ecx);
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printf("[%04lx %04lx %04lx %ld %02x]\n",
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eax,ebx,ecx,i,apm_errno);
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#endif
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}
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/* engage/disengage power management (APM 1.1 or later) */
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static int
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apm_engage_disengage_pm(int engage)
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{
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u_long eax,ebx,ecx,i;
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eax = (APM_BIOS<<8) | APM_ENGAGEDISENGAGEPM;
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ebx = PMDV_ALLDEV;
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ecx = engage;
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i = apm_int(&eax,&ebx,&ecx);
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return i;
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}
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/* get PM event */
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static u_int
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apm_getevent(void)
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{
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u_long eax,ebx,ecx;
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eax = (APM_BIOS<<8) | APM_GETPMEVENT;
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ebx = 0;
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ecx = 0;
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if (apm_int(&eax,&ebx,&ecx))
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return PMEV_NOEVENT;
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return ebx & 0xffff;
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}
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/* suspend entire system */
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static int
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apm_suspend_system(void)
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{
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u_long eax,ebx,ecx;
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eax = (APM_BIOS<<8) | APM_SETPWSTATE;
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ebx = PMDV_ALLDEV;
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ecx = PMST_SUSPEND;
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if (apm_int(&eax,&ebx,&ecx)) {
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printf("Entire system suspend failure: errcode = %ld\n",
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0xff & (eax >> 8));
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return 1;
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}
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return 0;
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}
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/* APM Battery low handler */
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static void
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apm_battery_low(void)
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{
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printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
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}
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static struct timeval suspend_time;
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static int
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apm_default_resume(void)
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{
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u_int second, minute, hour;
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struct timeval resume_time;
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inittodr(0); /* adjust time to RTC */
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microtime(&resume_time);
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second = resume_time.tv_sec - suspend_time.tv_sec;
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hour = second / 3600;
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second %= 3600;
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minute = second / 60;
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second %= 60;
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log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
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hour, minute, second);
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return 0;
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}
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static int
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apm_default_suspend(void)
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{
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int pl;
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microtime(&suspend_time);
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apm_suspend_system();
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return 0;
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}
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/* get APM information */
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static int
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apm_get_info(apm_info_t aip)
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{
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u_long eax,ebx,ecx;
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eax = (APM_BIOS<<8)|APM_GETPWSTATUS;
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ebx = PMDV_ALLDEV;
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ecx = 0;
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if (apm_int(&eax,&ebx,&ecx))
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return 1;
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aip->ai_acline = (ebx >> 8) & 0xff;
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aip->ai_batt_stat = ebx & 0xff;
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aip->ai_batt_life = ecx & 0xff;
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aip->ai_major = (u_int)majorversion;
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aip->ai_minor = (u_int)minorversion;
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return 0;
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}
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static void apm_processevent(void);
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/* inform APM BIOS that CPU is idle */
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void
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apm_cpu_idle(void)
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{
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if (idle_cpu) {
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if (active) {
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__asm ("movw $0x5305, %ax; lcall _apm_addr");
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}
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}
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/*
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* Some APM implementation halts CPU in BIOS, whenever
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* "CPU-idle" function are invoked, but swtch() of
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* FreeBSD halts CPU, therefore, CPU is halted twice
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* in the sched loop. It makes the interrupt latency
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* terribly long and be able to cause a serious problem
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* in interrupt processing. We prevent it by removing
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* "hlt" operation from swtch() and managed it under
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* APM driver.
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*/
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if (!active || halt_cpu) {
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__asm("sti ; hlt"); /* wait for interrupt */
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}
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}
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/* inform APM BIOS that CPU is busy */
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void
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apm_cpu_busy(void)
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{
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if (idle_cpu && active) {
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__asm("movw $0x5306, %ax; lcall _apm_addr");
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}
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}
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/*
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* APM timeout routine:
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*
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* This routine is automatically called by timer once per second.
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*/
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static void
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apm_timeout(void *arg1)
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{
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apm_processevent();
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timeout(apm_timeout, NULL, hz - 1 ); /* More than 1 Hz */
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}
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/* enable APM BIOS */
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static void
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apm_event_enable(void)
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{
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#ifdef APM_DEBUG
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printf("called apm_event_enable()\n");
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#endif
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if (apm_initialized) {
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active = 1;
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apm_timeout(0);
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}
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}
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/* disable APM BIOS */
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static void
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apm_event_disable(void)
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{
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#ifdef APM_DEBUG
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printf("called apm_event_disable()\n");
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#endif
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if (apm_initialized) {
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untimeout(apm_timeout, NULL);
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active = 0;
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}
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}
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/* halt CPU in scheduling loop */
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static void apm_halt_cpu(void)
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{
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if (apm_initialized) {
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halt_cpu = 1;
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}
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}
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/* don't halt CPU in scheduling loop */
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static void apm_not_halt_cpu(void)
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{
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if (apm_initialized) {
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halt_cpu = 0;
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}
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}
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/* device driver definitions */
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int apmprobe (struct isa_device *);
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int apmattach(struct isa_device *);
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struct isa_driver apmdriver = { apmprobe, apmattach, "apm" };
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/*
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* probe APM (dummy):
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*
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* APM probing routine is placed on locore.s and apm_init.S because
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* this process forces the CPU to turn to real mode or V86 mode.
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* Current version uses real mode, but on future version, we want
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* to use V86 mode in APM initialization.
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*/
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int
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apmprobe(struct isa_device *dvp)
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{
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switch (apm_version) {
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case APMINI_CANTFIND:
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/* silent */
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return 0;
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case APMINI_NOT32BIT:
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printf("apm%d: 32bit connection is not supported.\n",
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dvp->id_unit);
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return 0;
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case APMINI_CONNECTERR:
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printf("apm%d: 32-bit connection error.\n", dvp->id_unit);
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return 0;
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}
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if ((apm_version & 0xff00) != 0x0100) return 0;
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if ((apm_version & 0x00f0) >= 0x00a0) return 0;
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if ((apm_version & 0x000f) >= 0x000a) return 0;
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return -1;
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}
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/* Process APM event */
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static void
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apm_processevent(void)
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{
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int apm_event;
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#ifdef APM_DEBUG
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# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
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printf("Original APM Event: " #symbol "\n");
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#else
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# define OPMEV_DEBUGMESSAGE(symbol) case symbol:
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#endif
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while (1) {
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apm_event = apm_getevent();
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if (apm_event == PMEV_NOEVENT)
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break;
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switch (apm_event) {
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OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
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apm_default_suspend();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
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apm_default_suspend();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
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apm_default_suspend();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
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apm_default_suspend();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
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apm_default_resume();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
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apm_default_resume();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
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apm_default_resume();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
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apm_battery_low();
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apm_default_suspend();
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break;
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OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
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break;
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OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
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inittodr(0); /* adjust time to RTC */
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break;
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default:
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printf("Unknown Original APM Event 0x%x\n", apm_event);
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break;
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}
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}
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}
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/*
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* Attach APM:
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*
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* Initialize APM driver (APM BIOS itself has been initialized in locore.s)
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*
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* Now, unless I'm mad, (not quite ruled out yet), the APM-1.1 spec is bogus:
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*
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* Appendix C says under the header "APM 1.0/APM 1.1 Modal BIOS Behavior"
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* that "When an APM Driver connects with an APM 1.1 BIOS, the APM 1.1 BIOS
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* will default to an APM 1.0 connection. After an APM Driver calls the APM
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* Driver Version function, specifying that it supports APM 1.1, and [sic!]
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* APM BIOS will change its behavior to an APM 1.1 connection. If the APM
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* BIOS is an APM 1.0 BIOS, the APM Driver Version function call will fail,
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* and the connection will remain an APM 1.0 connection."
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*
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* OK so I can establish a 1.0 connection, and then tell that I'm a 1.1
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* and maybe then the BIOS will tell that it too is a 1.1.
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* Fine.
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* Now how will I ever get the segment-limits for instance ? There is no
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* way I can see that I can get a 1.1 response back from an "APM Protected
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* Mode 32-bit Interface Connect" function ???
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*
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* Who made this, Intel and Microsoft ? -- How did you guess !
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*
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* /phk
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*/
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int
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apmattach(struct isa_device *dvp)
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{
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/* setup APM parameters */
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cs32_base = (apm_cs32_base << 4) + KERNBASE;
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cs16_base = (apm_cs16_base << 4) + KERNBASE;
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ds_base = (apm_ds_base << 4) + KERNBASE;
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cs_limit = apm_cs_limit;
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ds_limit = apm_ds_limit;
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cs_entry = apm_cs_entry;
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idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0);
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disabled = ((apm_flags & APM_DISABLED) != 0);
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disengaged = ((apm_flags & APM_DISENGAGED) != 0);
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/* print bootstrap messages */
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#ifdef APM_DEBUG
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printf(" found APM BIOS version %04x\n", apm_version);
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printf("apm%d: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n",
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dvp->id_unit, cs32_base, cs16_base, ds_base);
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printf("apm%d: Code entry 0x%08x, Idling CPU %s, Management %s\n",
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dvp->id_unit, cs_entry, is_enabled(idle_cpu),
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is_enabled(!disabled));
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printf("apm%d: CS_limit=%x, DS_limit=%x\n",
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dvp->id_unit, cs_limit,ds_limit);
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#endif /* APM_DEBUG */
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cs_limit = 0xffff;
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ds_limit = 0xffff;
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/* setup GDT */
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setup_apm_gdt(cs32_base, cs16_base, ds_base, cs_limit, ds_limit);
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/* setup entry point 48bit pointer */
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apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL);
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apm_addr.offset = cs_entry;
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/* Try to kick bios into 1.1 mode */
|
|
apm_driver_version();
|
|
|
|
minorversion = ((apm_version & 0x00f0) >> 4) * 10 +
|
|
((apm_version & 0x000f) >> 0);
|
|
majorversion = ((apm_version & 0xf000) >> 12) * 10 +
|
|
((apm_version & 0x0f00) >> 8);
|
|
|
|
intversion = INTVERSION(majorversion, minorversion);
|
|
|
|
if (intversion >= INTVERSION(1, 1)) {
|
|
printf("apm%d: Engaged control %s\n",
|
|
dvp->id_unit, is_enabled(!disengaged));
|
|
}
|
|
|
|
printf(" found APM BIOS version %d.%d\n", majorversion, minorversion);
|
|
printf("apm%d: Idling CPU %s\n", dvp->id_unit, is_enabled(idle_cpu));
|
|
|
|
/* enable power management */
|
|
if (disabled) {
|
|
if (apm_enable_disable_pm(1)) {
|
|
printf("Warning: APM enable function failed! [%x]\n",
|
|
apm_errno);
|
|
}
|
|
}
|
|
|
|
/* engage power managment (APM 1.1 or later) */
|
|
if (intversion >= INTVERSION(1, 1) && disengaged) {
|
|
if (apm_engage_disengage_pm(1)) {
|
|
printf("Warning: APM engage function failed [%x]\n",
|
|
apm_errno);
|
|
}
|
|
}
|
|
|
|
apm_initialized = 1;
|
|
|
|
apm_event_enable();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
apmopen(dev_t dev, int flag, int fmt, struct proc *p)
|
|
{
|
|
if (!apm_initialized) {
|
|
return ENXIO;
|
|
}
|
|
if (minor(dev))
|
|
return (ENXIO);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
apmclose(dev_t dev, int flag, int fmt, struct proc *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
apmioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p)
|
|
{
|
|
int error = 0;
|
|
int pl;
|
|
|
|
#ifdef APM_DEBUG
|
|
printf("APM ioctl: minor = %d, cmd = 0x%x\n", minor(dev), cmd);
|
|
#endif
|
|
|
|
pl = splhigh();
|
|
if (minor(dev) != 0) {
|
|
return ENXIO;
|
|
}
|
|
if (!apm_initialized) {
|
|
return ENXIO;
|
|
}
|
|
switch (cmd) {
|
|
case APMIO_SUSPEND:
|
|
apm_default_suspend();
|
|
break;
|
|
case APMIO_GETINFO:
|
|
if (apm_get_info((apm_info_t)addr)) {
|
|
error = ENXIO;
|
|
}
|
|
break;
|
|
case APMIO_ENABLE:
|
|
apm_event_enable();
|
|
break;
|
|
case APMIO_DISABLE:
|
|
apm_event_disable();
|
|
break;
|
|
case APMIO_HALTCPU:
|
|
apm_halt_cpu();
|
|
break;
|
|
case APMIO_NOTHALTCPU:
|
|
apm_not_halt_cpu();
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
splx(pl);
|
|
return error;
|
|
}
|
|
|
|
#endif /* NAPM > 0 */
|