pfsisplug.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* unpublished proprietary information of Silicon Graphics, Inc., and *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 __osPfsPifRam __attribute__((aligned (16)));
#else
OSPifRam __osPfsPifRam;
#endif
s32
osPfsIsPlug(OSMesgQueue *queue, u8 *pattern)
{
s32 ret = 0;
OSMesg dummy;
u8 bitpattern;
OSContStatus data[MAXCONTROLLERS];
int channel;
u8 bits = 0;
int crc_error_cnt = 3;
/* Block to get resource token */
__osSiGetAccess();
do {
/* Set up request command format for all channels */
__osPfsRequestData(CONT_REQUEST);
ret = __osSiRawStartDma(OS_WRITE, &__osPfsPifRam);
(void)osRecvMesg(queue, &dummy, OS_MESG_BLOCK);
/* trigger pifmacro */
ret = __osSiRawStartDma(OS_READ, &__osPfsPifRam);
(void)osRecvMesg(queue, &dummy, OS_MESG_BLOCK);
/* reformat the 64 bytes RAM data and save in data array */
__osPfsGetInitData(&bitpattern, &data[0]);
/* check crc error and loop if there is an error */
for (channel = 0; channel < __osMaxControllers; channel++) {
if ((data[channel].status & CONT_ADDR_CRC_ER) == 0) {
crc_error_cnt --;
break;
}
}
if (channel== __osMaxControllers) {
crc_error_cnt = 0;
}
} while (crc_error_cnt > 0);
/* loop through data array to check error bits */
for (channel = 0; channel < __osMaxControllers; channel++) {
if ((data[channel].errno == 0) &&
((data[channel].status & CONT_CARD_ON) != 0))
bits |= (1<<channel);
}
__osSiRelAccess();
*pattern = bits;
return(ret);
}
void
__osPfsRequestData(u8 cmd)
{
u8 *ptr = (u8 *)(&__osPfsPifRam);
__OSContRequesFormat requestformat;
int i;
__osContLastCmd = cmd;
/* set format flag */
#ifndef _HW_VERSION_1
__osPfsPifRam.pifstatus = CONT_FORMAT;
#else
__osPfsPifRam.pifstatus = 0;
#endif
/* 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
}
/*
* Reformat the 64 bytes RAM data into RequestData format
* and check error code.
*/
void
__osPfsGetInitData(u8 *pattern, OSContStatus *data)
{
u8 *ptr;
__OSContRequesFormat requestformat;
int i;
u8 bits = 0;
ptr = (u8 *)(&__osPfsPifRam);
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;
}