contreaddata.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* unpublished proprietary information of Silicon Graphics, Inc., and *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"
static void __osPackReadData(void);
/*
* This call issues a read data command to controllers to get input
* data from controllers.
* A value of 0 is returned if the calls succeed, otherwise
* -1 is returned
*/
s32
osContStartReadData(OSMesgQueue *mq)
{
s32 ret = 0;
/* Block to get resource token */
__osSiGetAccess();
if (CONT_READ != __osContLastCmd) {
/* Set up request command format for all channels */
__osPackReadData();
ret = __osSiRawStartDma(OS_WRITE, &__osContPifRam);
(void)osRecvMesg(mq, (OSMesg *)NULL, OS_MESG_BLOCK);
}
/* trigger pifmacro */
ret = __osSiRawStartDma(OS_READ, &__osContPifRam);
__osContLastCmd = CONT_READ;
/* Return resource token */
__osSiRelAccess();
return(ret);
}
/*
* Reformat the 64 bytes RAM data into OSContPad format
* and check error code.
*/
void
osContGetReadData(OSContPad *data)
{
u8 *ptr = (u8 *)(&__osContPifRam);
__OSContReadFormat readformat;
int i;
for (i = 0; i < __osMaxControllers; i++,
ptr += sizeof(readformat), data++) {
/* read read format for all the channel */
readformat = *((__OSContReadFormat *)ptr);
#ifndef _HW_VERSION_1
data->errno = (u8)((readformat.rxsize & CON_ERR_MASK) >> 4);
#else
data->errno = (u8)(((readformat.txsize & CON_ERR_MASK) >> 4)
| ((readformat.rxsize & CON_ERR_MASK) >> 6));
#endif
if (data->errno)
continue;
data->button = readformat.button;
data->stick_x = readformat.stick_x;
data->stick_y = readformat.stick_y;
}
}
static void
__osPackReadData(void)
{
u8 *ptr = (u8 *)(&__osContPifRam);
__OSContReadFormat readformat;
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
/* Setup read format for each channel */
readformat.dummy = 0xff;
readformat.txsize = 1;
readformat.rxsize = 4;
readformat.cmd = CONT_READ;
readformat.button = 0xffff;
readformat.stick_x = (s8)0xff;
readformat.stick_y = (s8)0xff;
for(i=0; i < __osMaxControllers; i++) {
/* setup read format for connected channel */
*((__OSContReadFormat *)ptr) = readformat;
ptr += sizeof(readformat);
}
#ifndef _HW_VERSION_1
*((u8 *)ptr) = FORMAT_END;
#endif
}