409 lines
13 KiB
C
409 lines
13 KiB
C
/*
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Hacks to match MacOS (most recent first):
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<Sys7.1> 8/3/92 Reverted Horror and SuperMario changes
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Brought Get_AtoD/Get_PGEButton/GetPortableValues/PotControl back from backlightinput.c
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Recreated PWMStatus (similar code to PWMControl)
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Reduced the amount of indirection through global procedure pointers
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9/2/94 SuperMario ROM source dump (header preserved below)
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*/
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/*
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File: PWM.c
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Contains: This file contains the hardware specific routines to control a PWM-based
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interface found on Asahi, TIM, DB-Lite.
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Written by: Andy Gong x6595
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Copyright: © 1990-1993 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<SM3> 2/11/93 CSS Update from Horror. Comments follow:
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<H10> 6/30/92 ag Moved cpu depended initialization code to cpu.c file, input
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routines to input.c, and table routines to backlight.c file.
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<H9> 5/26/92 ag Added write to PONTI to turnoff backlight through PONTI bit.
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<H8> 5/7/92 ag Use new table record for min/max limits. Added new entry for
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Dartanian.
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<H7> 4/24/92 ag set default to single table operation except on TIM (LC). added
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new vector for custom input control to handle hardware
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dependencies.
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<H6> 12/17/91 SWC Added boxDBLiteLC to the list in InitPWMControls. Grouped boxTIM
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and boxDartanian since their code is identical.
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<H5> 12/16/91 HJR Added boxDartanian to the list.
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<H4> 9/10/91 SWC Changed Get_AtoD to get the current setting of the up/down
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buttons.
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<H3> 8/27/91 SWC Changed references to get/set contrast to use get/set brightness
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on machines other than TIM. On TIM, they used the contrast
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command to control screen brightness. Added PWM table for
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DB-Lite.
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<H2> 8/5/91 SWC Changed Get_AtoD to use GetScreenCmd to get the current contrast
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instead of reading from the A-D if not on TIM.
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<3> 3/24/92 JSM Nuke boxFlag codenames.
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<2> 3/23/92 JSM OSEvents.h is obsolete, use Events.h.
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<1> 10/24/91 SAM/KSM Rolled in Regatta file.
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Regatta Change History:
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<6> 8/29/91 SAM (ag) changed power manager call "BatteryStatusImmCmd" for more
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responsiveness.
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<5> 7/18/91 SAM (ag) changed initialization code. converted to table only brightness
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levels.
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<4> 6/30/91 SAM Merged from TERROR [<4><5><6><7><8>].
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<3> 6/14/91 SAM (ag) Turnoff backlight at close. Changed low power handling
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code, to rescale pot to lower range.
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<1> 5/15/91 SAM Split off from TERRORProj.
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Terror Change History:
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<8> 6/27/91 ag fixed bug with init powerbook 100, initialize table based data
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only on table based hardware.
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<7> 6/27/91 ag centralize table determination code "LowTable".
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<6> 6/27/91 ag code clean up.
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<5> 6/26/91 ag added support for table change as a function of charger and
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voltage.
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<4> 6/24/91 ag Changed look up table size to byte elements. Added software
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scale control. Added software setting controls. Added software
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table control.
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<3> 6/10/91 ag Changed low power handling code, to rescale pot to lower range.
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<2> 6/5/91 ag turnoff backlight at close
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*/
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/*page*/
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/************************************/
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/*** INCLUDE FILES DECLARATIONS ***/
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#include <SysEqu.h>
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#include <types.h>
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#include <memory.h>
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#include <Events.h>
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#include <devices.h>
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#include <errors.h>
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#include <retrace.h>
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#include <Shutdown.h>
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#include <stdlib.h>
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#include "PowerMgr.h"
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#include "backlight.h"
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/* <Sys7.1> copied from backlightcpu.c */
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#define BACKLIGHT_POT_CHANNEL 0
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#define STATUS 0
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#define POWERBYTE 1
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#define TEMPBYTE 2
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/* <Sys7.1> reclaimed from backlightinput.c */
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#define READ_ATOD_CHANNEL 0xD8
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#define READ_BUTTON_VALUE 0xD9
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extern short PotInputRangeShiftTblPWM[];
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/* <Sys7.1> enable access to these assembly "procedures" (really tables) */
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extern unsigned char timTblLow[];
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extern unsigned char timTbl[];
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extern unsigned char asahiTbl[];
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extern short PWMMaxTbl[];
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/*page
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***************************************************************************************************
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** PWM software ***********************************************************************************
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***************************************************************************************************
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*/
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/* <Sys7.1> don't return OSErr */
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/* <Sys7.1> reverted to old-style tables despite <H8> */
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void InitPWMControls(driverGlobalPtr globalPtr)
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{
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unsigned int startvalue;
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int boxFlag;
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/* <Sys7.1> setup default values */
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globalPtr->flyByWire = true;
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globalPtr->freeflag = true;
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globalPtr->dualTable = true;
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globalPtr->userInputSampleRate = 10;
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globalPtr->maximumTable = &PWMMaxTbl;
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globalPtr->settingTableLow = &timTblLow;
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globalPtr->settingTable = globalPtr->settingTableHigh = &timTbl;
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/* <Sys7.1> override for some specific machines */
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boxFlag = *(unsigned char *)0xCB3;
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switch (boxFlag)
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{
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case 18: // PowerBook 100, Asahi
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globalPtr->freeflag = false;
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globalPtr->dualTable = false;
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globalPtr->settingTable = &asahiTbl;
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break;
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case 15: // PowerBook 170, TIM
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if (*JAWS_SPEED_FSTN_REG_PTR & JAWS_FSTN)
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globalPtr->dualTable = false;
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break;
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}
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/* initialize dual table variables */
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if (globalPtr->dualTable)
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{
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globalPtr->slewLimit = true; /* maximum change per/accrun */
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/* <Sys7.1> determine table directly instead of using a tableProc */
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globalPtr->lowThreshold = 163;
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globalPtr->hiThreshold = 173;
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globalPtr->tableProc = ChargerAdjust;
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globalPtr->lowTable = LowTable(globalPtr);
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if (globalPtr->lowTable)
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globalPtr->settingTable = globalPtr->settingTableLow;
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};
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/* <Sys7.1> not really sure why these procs weren't being set */
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globalPtr->setlevelproc = SetPWM;
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globalPtr->userInputProc = PotControl;
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globalPtr->closeProc = PWMCloseRoutine;
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globalPtr->controlProc = PWMControl;
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globalPtr->statusProc = PWMStatus;
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/* initialize backlight hardware */
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startvalue = PotControl(globalPtr); /* <H8> */
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globalPtr->userBrightness = -1;
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globalPtr->userBrightness = SetPWM(startvalue,globalPtr); /* <H8> */
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};
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/*
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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int PWMCloseRoutine (driverGlobalPtr globalPtr)
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{
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SetPWM(0,globalPtr); /* <Sys7.1> no global setlevelproc */
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return(0);
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};
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/*
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> moved from bottom of file and edited */
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/* <Sys7.1> reverted to old-style tables despite <H8> */
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int SetPWM(int new,driverGlobalPtr globalPtr)
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{
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PMgrPBlock pb; /* power manager pb */
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unsigned char val; /* hardware value setting */
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PEG_TO_LIMITS(new, globalPtr->maximumTable[globalPtr->powerRange], 0); /* <H8> use new tables */ /* limit value to valid range */
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val = globalPtr->settingTable[new]; /* look up value from table */
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if ((globalPtr->userBrightness >= 0) && (val == globalPtr->lastHWSetting)) return(new);/* nothing to do; 90/05/15 just turn on; 90/07/02 avoid touching */
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if (globalPtr->slewChange)
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{
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if (abs(globalPtr->lastHWSetting - val) > globalPtr->slewLimit)
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val = globalPtr->lastHWSetting + ((globalPtr->lastHWSetting > val) ? -globalPtr->slewLimit : globalPtr->slewLimit);
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else
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globalPtr->slewChange = false;
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};
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globalPtr->lastHWSetting = val; /* save the new hardware setting */
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pb.pmgrCmd = ScreenSetCmd; /* <Sys7.1> don't do what they do */ /* everyone else uses "set brightness" */
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pb.pmgrCnt = 1;
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pb.pmgrXPtr = &val;
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pb.pmgrRPtr = nil;
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PMgr(&pb); /* set the pwm */
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return(new); /* return the current value */
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};
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/*page
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> verbatim from backlightinput.c */
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unsigned char Get_AtoD(int channel)
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{
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PMgrPBlock pb; /* power manager pb */
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char atodChannel; /* a to d channel to read [0-8] */
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unsigned char value; /* return value */
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OSErr error; /* pmgr error */
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atodChannel = channel; /* load channel value into buffer */
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pb.pmgrCmd = READ_ATOD_CHANNEL; /* load read channel command */
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pb.pmgrCnt = 1; /* transmit buffer count is 1 byte */
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pb.pmgrXPtr = &atodChannel; /* pointer to transmit buffer */
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pb.pmgrRPtr = &value; /* pointer to receive buffer */
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error = PMgr(&pb);
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return( (error) ? 0 : value);
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};
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/*page
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> verbatim from backlightinput.c */
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unsigned char Get_PGEButton(int channel)
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{
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PMgrPBlock pb; /* power manager pb */
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char atodChannel; /* a to d channel to read [0-8] */
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unsigned char value; /* return value */
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OSErr error; /* pmgr error */
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atodChannel = channel; /* load channel value into buffer */
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pb.pmgrCmd = READ_BUTTON_VALUE; /* load read channel command */
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pb.pmgrCnt = 1; /* transmit buffer count is 1 byte */
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pb.pmgrXPtr = &atodChannel; /* pointer to transmit buffer */
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pb.pmgrRPtr = &value; /* pointer to receive buffer */
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error = PMgr(&pb);
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return( (error) ? 0 : value);
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};
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/*page
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> verbatim from backlightinput.c */
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unsigned char GetPortableValues(int parameter)
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{
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PMgrPBlock pb; /* power manager pb */
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OSErr err; /* power manager error */
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unsigned char rbuf[3]; /* buffer for send command */
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pb.pmgrCmd = BatteryStatusImmCmd; /* on old pmgr, read battery status (immediate not averaged) */
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pb.pmgrCnt = 0;
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pb.pmgrXPtr = nil;
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pb.pmgrRPtr = rbuf;
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err = PMgr(&pb);
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return( (err) ? 0 : rbuf[parameter]); /* return 0 if error, else read value */
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}
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/*page
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***************************************************************************************************
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> modified from backlightinput.c */
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int PotControl (driverGlobalPtr globalPtr)
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{
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#pragma unused (globalPtr)
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unsigned int potvalue;
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/* <Sys7.1> no proc for this in driver globals */
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potvalue = globalPtr->freeflag ? Get_AtoD(BACKLIGHT_POT_CHANNEL) : GetPortableValues(TEMPBYTE);
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if (abs(globalPtr->lastatod - potvalue) <= 5) /* was the change less than 100mv */
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potvalue = globalPtr->lastatod; /* is less than, the use old value */
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globalPtr->lastatod = potvalue; /* update last a to d value */
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potvalue >>= 3; /* scale to 0 to 31 */
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if (potvalue) /* if non-zero, check for subrange limiting */
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{
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potvalue >>= PotInputRangeShiftTblPWM[globalPtr->powerRange]; /* rescale in low power levels */
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if (!potvalue) potvalue = 1; /* make sure we don't change the backlight state */
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};
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return(potvalue);
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};
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/*page
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***************************************************************************************************
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*
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* The control routine…
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*
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* return:
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* noErr - task completed successfully
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* controlErr - illegal control selector
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*
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*
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***************************************************************************************************
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*/
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OSErr PWMControl(CntrlParam *ctlPB,driverGlobalPtr globalPtr) /* 'open' entry point */
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{
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int error;
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int tempvalue;
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error = noErr;
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if (!globalPtr->disableHWinput) /* if hardware not disabled, error */
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error = controlErr;
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else
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switch(ctlPB->csCode)
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{
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case kSetScreenBrightness: /* set brightness level */
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tempvalue = ctlPB->csParam[0];
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globalPtr->userBrightness = SetPWM(tempvalue,globalPtr); /* <Sys7.1> no proc for this in driver globals */
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break;
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default:
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error = controlErr;
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};
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return(error);
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};
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/*page
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***************************************************************************************************
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*
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* The status routine…
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*
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* return:
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* noErr - task completed successfully
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* statusErr - illegal status selector
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*
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*
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***************************************************************************************************
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*/
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/* <Sys7.1> recreated from scratch */
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OSErr PWMStatus(CntrlParam *ctlPB,driverGlobalPtr globalPtr)
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{
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OSErr error;
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error = noErr;
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switch(ctlPB->csCode)
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{
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case kGetScreenBrightness: /* get brightness level */
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ctlPB->csParam[0] = globalPtr->userBrightness;
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break;
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case kGetBrightnessRange:
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ctlPB->csParam[0] = 31;
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ctlPB->csParam[1] = 0;
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break;
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case kGetMaximum:
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ctlPB->csParam[0] = globalPtr->maximumTable[globalPtr->powerRange];
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break;
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default:
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error = statusErr;
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};
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return(error);
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}
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