controller.c
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/**************************************************************************
* *
* Copyright (C) 1995, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include "osint.h"
#include "controller.h"
#include "siint.h"
#if __GNUC__
OSPifRam __osContPifRam __attribute__((aligned (16)));
#else
OSPifRam __osContPifRam; /* PIF RAM buffer */
#endif
u8 __osContLastCmd; /* last pifmacro command */
u8 __osMaxControllers; /* # of connected controllers */
OSTimer __osEepromTimer;
OSMesgQueue __osEepromTimerQ;
OSMesg __osEepromTimerMsg;
int __osContinitialized=0;
/*
* This call resets all the controllers and returns
* a bit pattern to indicate which controllers are connected.
* It also returns controller's type and status for all the connected
* controllers
*/
s32
osContInit(OSMesgQueue *mq, u8 *bitpattern, OSContStatus *data)
{
OSMesg dummy;
s32 ret = 0;
OSTime t;
OSTimer mytimer;
OSMesgQueue timerMesgQueue;
if (__osContinitialized != 0)
return(0);
__osContinitialized = 1;
/* need to wait for .5 sec */
t = osGetTime();
if (t < OS_USEC_TO_CYCLES(500000)) {
osCreateMesgQueue(&timerMesgQueue, &dummy, 1);
osSetTimer(&mytimer,OS_USEC_TO_CYCLES(500000)-t, 0,
&timerMesgQueue,&dummy);
(void)osRecvMesg(&timerMesgQueue, &dummy, OS_MESG_BLOCK);
}
__osMaxControllers = MAXCONTROLLERS;
/* Set up request command format for all channels */
__osPackRequestData(CONT_REQUEST);
ret = __osSiRawStartDma(OS_WRITE, &__osContPifRam);
(void)osRecvMesg(mq, &dummy, OS_MESG_BLOCK);
/* trigger pifmacro */
ret = __osSiRawStartDma(OS_READ, &__osContPifRam);
(void)osRecvMesg(mq, &dummy, OS_MESG_BLOCK);
/* reformat the 64 bytes RAM data and save in data array */
__osContGetInitData(bitpattern, data);
__osContLastCmd = CONT_REQUEST;
__osSiCreateAccessQueue();
osCreateMesgQueue(&__osEepromTimerQ, &__osEepromTimerMsg, 1);
return(ret);
}
/*
* Reformat the 64 bytes RAM data into RequestData format
* and check error code.
*/
void
__osContGetInitData(u8 *pattern, OSContStatus *data)
{
u8 *ptr;
__OSContRequesFormat requestformat;
int i;
u8 bits = 0;
ptr = (u8 *)(&__osContPifRam);
for (i = 0; i < __osMaxControllers; i++,
ptr += sizeof(requestformat), data++) {
/* read request format for all the channel */
requestformat = *((__OSContRequesFormat *)ptr);
#ifndef _HW_VERSION_1
data->errno = (u8)((requestformat.rxsize & CON_ERR_MASK) >> 4);
#else
data->errno = (u8)(((requestformat.txsize & CON_ERR_MASK) >> 4)
| ((requestformat.rxsize & CON_ERR_MASK) >> 6));
#endif
if (data->errno)
continue;
data->type =(u16)((requestformat.typel<<8)|requestformat.typeh);
data->status = requestformat.status;
bits |= (1<<i);
}
*pattern = bits;
}
void
__osPackRequestData(u8 cmd)
{
u8 *ptr;
__OSContRequesFormat requestformat;
int i;
/* clear pif ram */
for (i = 0; i < PIFRAMSIZE-1 ; i++)
__osContPifRam.ramarray[i] = 0;
#ifndef _HW_VERSION_1
__osContPifRam.pifstatus = CONT_FORMAT;
#else
__osContPifRam.pifstatus = 0;
#endif
ptr = (u8 *)(&__osContPifRam);
/* Setup request format for each channel */
requestformat.dummy = 0xff;
requestformat.txsize = 1;
requestformat.rxsize = 3;
requestformat.cmd = cmd;
requestformat.typeh = 0xff;
requestformat.typel = 0xff;
requestformat.status = 0xff;
requestformat.dummy1 = 0xff;
for (i = 0; i < __osMaxControllers; i++) {
/* setup request format for all the channel */
*((__OSContRequesFormat *)ptr) = requestformat;
ptr += sizeof(requestformat);
}
#ifndef _HW_VERSION_1
*((u8 *)ptr) = FORMAT_END;
#endif
}