/*
 *  F i l e N a m e  :  l e o m e c h a . c
 *
 ****************************************************************************
 *               (C) Copyright ALPS Electric Co., Ltd. 1995-1996
 ****************************************************************************
 *  Version
 *
 *  ver     Date
 *  ----  --------
 *  1.08  '97-06-23  Inhibit retry for DIAG-error in leoChk_err_retry().
 *  1.07  '97-06-18  Add check of return value of osRecvMesg() in leoRecv_event_mesg().
 *  1.06  '97-02-19  Add UA operation.
 *                   Add LEO_SENSE_EJECTED_ILLEGALLY_RESUME.
 *  1.05  '96-12-24  Change ram name.
 *  1.04  '96-10-31  Add leoWait_mecha_cmd_done(), leoRecal_w(), leoSeek_w(),
 *                      leoRecv_event_mesg() for NMI_RESET .
 *                   Move leoChk_err_retry() from leoint.c.
 *                   Add SC_DEVICE_COMMUNICATION_FAIL, SC_COMMAND_PHASE_ERROR
 *                   in leoChk_err_retry().
 *  1.03  '96-09-17  Change leoChk_asic_ready(), ASIC_CUR_STATUS is argment.
 *  1.02  '96-07-25  Add leoAnalize_asic_status(); leoChk_asic_ready();
 *                      leoChk_done_status(); leoSend_asic_cmd_i();
 *                      leoSend_asic_cmd_w(); leoDetect_index_w();
 *                      for phase1.5  .
 *  1.01  '96-02-27  Rename asic_if.c to leomecha.c
 *  1.00  '95-12-20  Initial revision .
 ****************************************************************************
*/
#define _ASIC_IF

#include "os.h"

#include <ultra64.h>
#include "leodefine.h"
#include "leodrive.h"
#include "leomacro.h"
#include "leoappli.h"

/*************************************/
/* 関数プロトタイプ宣言              */
/*************************************/
u8   leoAnalize_asic_status(void );
u8   leoChk_asic_ready(u32 asic_cmd);
u8   leoChk_done_status(u32 asic_cmd);
u8   leoSend_asic_cmd_i(u32 asic_cmd, u32 asic_data);
u8   leoWait_mecha_cmd_done(u32 asic_cmd );
u8   leoSend_asic_cmd_w(u32 asic_cmd, u32 asic_data);
u8   leoDetect_index_w(void);
u8   leoRecal_i(void);
u8   leoRecal_w(void);
u8   leoSeek_i(u16 rwmode);
u8   leoSeek_w(void);

u8   leoRecv_event_mesg(s32 control);
void leoDrive_reset(void);

/*************************************/
/* 外部参照の関数                    */
/*************************************/
static u32 asic_cur_status;
static u32 unit_atten;

#define  UA_RESET          0x02
#define  UA_MEDIUMCHANGE   0x01

/*************************************/
/* 外部参照変数                    */
/*************************************/
extern OSMesgQueue LEOevent_que;
extern OSMesg      LEOcur_command;
extern u8     LEOdrive_flag;
extern struct tgt_param_form LEOtgt_param;

extern OSPiHandle *LEOPiInfo;

/* ==========================================================================
* Function : leoAnalize_asic_status
* --------------------------------------------------------------------------
* Description : Analize drive status register to check mecha condition.
* --------------------------------------------------------------------------
* IN     : NON
* OUT    : NON
* ARG    : NON
* RET    : 0     - GOOD
*        : NOT 0 - ERROR SENSE CODE
* ==========================================================================
*/
u8 leoAnalize_asic_status(void)
{
    u32 curr_stat;
    leoGet_leo_status(&asic_cur_status);
    curr_stat = asic_cur_status ^ LEO_STAT_DISK;
    if (curr_stat & (LEO_STAT_DISK + LEO_STAT_BUSY + LEO_STAT_RESET + LEO_STAT_DISK_CHANGE
                    + LEO_STAT_MECHA_ERROR + LEO_STAT_NC_CHK ) )
    {
        /* CLEAR FLAG TO FORCE RE-READ SYSTEM INFO */
        if (curr_stat & (LEO_STAT_DISK + LEO_STAT_BUSY + LEO_STAT_RESET + LEO_STAT_DISK_CHANGE
                       + LEO_STAT_NC_CHK ) )
            leoClr_sys_read();

        /*--------------------------*/
        /* check HardWare err first */
        /*--------------------------*/
        /* Drive communication fail ? */
        if (curr_stat & LEO_STAT_NC_CHK)
            return(LEO_SENSE_DEVICE_COMMUNICATION_FAILURE);

        /* Drive BUSY ? */
        if ((curr_stat & (LEO_STAT_BUSY+LEO_STAT_RESET)) == LEO_STAT_BUSY)
            return(LEO_SENSE_COMMAND_PHASE_ERROR);

        /*---------------------------------------------*/
        /*  CHECK RESET / DISK-CHANGE / NO-DISK        */
        /*---------------------------------------------*/

        /* RESET ? */
        if (curr_stat & LEO_STAT_RESET)
        {
            unit_atten |= UA_RESET;
            return (LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED);
        }

        /* NO DISK ?  */
        if (curr_stat & LEO_STAT_DISK)
            return (LEO_SENSE_EJECTED_ILLEGALLY_RESUME);

        /* DISK CHANGED ? */
        if (curr_stat & LEO_STAT_DISK_CHANGE)
        {
            unit_atten |= UA_MEDIUMCHANGE;
            return (LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED);
        }

        /*---------------------------------------------*/
        /*  CHECK other err                            */
        /*---------------------------------------------*/

        /* MECHA ERROR ? */
        if (curr_stat & LEO_STAT_MECHA_ERROR)
            return (LEO_SENSE_NO_SEEK_COMPLETE);
    }        
    /* ASIC status is OK */
    return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
}

/* ==========================================================================
* Function : leoChk_asic_ready
* --------------------------------------------------------------------------
* Description : Pre-check to command to drive.
*               Clear system info flag if reset/disk-change detected
* --------------------------------------------------------------------------
* IN       : non
* OUT      : non
* ARG      : asic_cmd   command code to drive
* RET      : 0     - good
*          : not 0 - not good . sense code is returned 
* ==========================================================================
*/
u8 leoChk_asic_ready(u32 asic_cmd)
{
    u32 sense_code;

    sense_code = leoAnalize_asic_status();

    switch (sense_code)
    {
        case LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED:
            if (asic_cmd == ASIC_CLR_CHGFLG)
                return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
        case LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED:
            /* clear drive flag */
            if (!(asic_cur_status & LEO_STAT_BUSY))
            {
                if (asic_cmd == ASIC_CLR_RSTFLG)
                    return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
                if (leoRecv_event_mesg(OS_MESG_NOBLOCK))
                    return (LEO_SENSE_WAITING_NMI);
                leoAd16WriteIo(ASIC_CMD, ASIC_CLR_RSTFLG);
                if (leoRecv_event_mesg(OS_MESG_BLOCK))
                    return (LEO_SENSE_WAITING_NMI);
            }
            break;
        case LEO_SENSE_EJECTED_ILLEGALLY_RESUME:
            /* Do this command needs disk ? */
            if (asic_cmd & ASIC_NEED_DISK_IN)
                break;
        case LEO_SENSE_NO_SEEK_COMPLETE:
            return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
        default:
            ;
    }
    return sense_code;
}   
		
/* ==========================================================================
* Function : leoChk_done_status
* --------------------------------------------------------------------------
* Description : Post check of command
*               Clear system info flag if reset/disk-change is detected
* --------------------------------------------------------------------------
* IN        : NON
* OUT       : NON
* ARG       : asic_cmd .. Command code to drive
* RET       : 0     - GOOD
*           : NOT 0 - ERROR SENSE CODE
* ==========================================================================
*/
u8 leoChk_done_status(u32 asic_cmd)
{
    u32 asic_data,code;

    code = leoAnalize_asic_status();

    switch (code)
    {
        case LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED:
        case LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED:
            if (!(asic_cur_status & LEO_STAT_BUSY))
            {
                /* clear reset/disk-change flag */
                if (leoRecv_event_mesg(OS_MESG_NOBLOCK))
                    return (LEO_SENSE_WAITING_NMI);
                leoAd16WriteIo(ASIC_CMD, ASIC_CLR_RSTFLG);
                if (leoRecv_event_mesg(OS_MESG_BLOCK))
                    return (LEO_SENSE_WAITING_NMI);
            }
            break;
        case LEO_SENSE_EJECTED_ILLEGALLY_RESUME:
            /* error if command needs disk */
            if (asic_cmd & ASIC_NEED_DISK_IN)
                break;
            return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
        case LEO_SENSE_NO_SEEK_COMPLETE:
            /* Request more infomation */
            leoAd16WriteIo(ASIC_DATA, 0x00);
            if (leoRecv_event_mesg(OS_MESG_NOBLOCK))
		return (LEO_SENSE_WAITING_NMI);
            leoAd16WriteIo(ASIC_CMD , ASIC_REQ_STATUS);
            /* wait done */
            if (leoRecv_event_mesg(OS_MESG_BLOCK))
		return (LEO_SENSE_WAITING_NMI);
            leoGet_leo_asic_data(&asic_data);

            if (code = leoChk_asic_ready(ASIC_REQ_STATUS))
                return code;

            /* Analize error info  */
            if (asic_data & MC_ERR_DIAGNOSTIC)      /* drive diag err */
                return(LEO_SENSE_DIAGNOSTIC_FAILURE);
            if (asic_data & MC_ERR_SERVO_DATA)      /* servo read err  */
                return(LEO_SENSE_NO_REFERENCE_POSITION_FOUND);
            if (asic_data & MC_ERR_INDEX)           /* index detect error or timing NG */
                return(LEO_SENSE_DRIVE_NOT_READY);
            if (asic_data & MC_ERR_SETRING_TIMEOUT) /* seek timeout */
                return(LEO_SENSE_NO_SEEK_COMPLETE);
            if (asic_data & MC_INVALID_PARAM)       /* invalid parameter(data) */
                return(LEO_SENSE_INCOMPATIBLE_MEDIUM_INSTALLED);     /* (invalid disk-type or seek out of range) */
            return(LEO_SENSE_DEVICE_COMMUNICATION_FAILURE);   /* unknown command */
        /*case LEO_SENSE_DEVICE_COMMUNICATION_FAILURE:*/
        /*case LEO_SENSE_COMMAND_PHASE_ERROR:         */
        default:
            ;
    }
    return code;
}   

/* ==========================================================================
* Function : leoSend_asic_cmd_i
* --------------------------------------------------------------------------
* Description : Issue commnad to drive. not wait done.
* --------------------------------------------------------------------------
* IN         : NON
* OUT        : ((LEOCmdHeader *)LEOcur_command)->sense is set at error.
* ARG        : asic_cmd : command,  asic_data : data to drive
* RET        : 0     - command issue normally
*            : not 0 - error sense code . command do not issue.
* ==========================================================================
*/
u8 leoSend_asic_cmd_i(u32 asic_cmd, u32 asic_data)
{
    u8  status;

    if (status = leoChk_asic_ready(asic_cmd))
        return(((LEOCmdHeader *)LEOcur_command)->sense = status);

    /* Issue command,data to drive */
    leoAd16WriteIo(ASIC_DATA, asic_data);
    if (leoRecv_event_mesg(OS_MESG_NOBLOCK))
        return(((LEOCmdHeader *)LEOcur_command)->sense = LEO_SENSE_WAITING_NMI);

    leoAd16WriteIo(ASIC_CMD , asic_cmd );

    return(FUNC_OK);
}

/* ==========================================================================
* Function : leoWait_mecha_cmd_done
* --------------------------------------------------------------------------
* Description : Wait drive command done and check error.
* --------------------------------------------------------------------------
* IN            : non
* OUT           : ((LEOCmdHeader *)LEOcur_command)->sense  is set at error
* ARG           : command code that drive executing.
* RET           : 00     - good 
*               : 00以外 - error sense code.
* ==========================================================================
*/
u8 leoWait_mecha_cmd_done(u32 asic_cmd )
{
    u32 done_stat;

    /* Wait done */
    if (leoRecv_event_mesg(OS_MESG_BLOCK))
        return(LEO_SENSE_WAITING_NMI);

    /* Check done status */
    if (done_stat = leoChk_done_status(asic_cmd))
        return(done_stat);

    return(FUNC_OK);
}
/* ==========================================================================
* Function : leoSend_asic_cmd_w
* --------------------------------------------------------------------------
* Description : Issue command to drive,waiting done and check error.
* --------------------------------------------------------------------------
* IN    : NON
* OUT   : ((LEOCmdHeader *)LEOcur_command)->sense is set at error
* ARG   : command and data to issue to drive
* RET   : 00     - good
*       : 00以外 - error sense code
* ==========================================================================
*/
u8 leoSend_asic_cmd_w(u32 asic_cmd, u32 asic_data)
{
    u32 wstatus;

    if (wstatus = leoSend_asic_cmd_i(asic_cmd, asic_data))
        return (wstatus);
    return leoWait_mecha_cmd_done(asic_cmd);
}


u8 leoSend_asic_cmd_w_nochkDiskChange(u32 asic_cmd, u32 asic_data)
{
    u8  status;
    u32 done_stat;

    status = leoChk_asic_ready(asic_cmd);
    
    if( ! ( (status == LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED) 
	   || (status == LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION) ) )
        return(((LEOCmdHeader *)LEOcur_command)->sense = status);

    /* Issue command,data to drive */
    leoAd16WriteIo(ASIC_DATA, asic_data);
    if (leoRecv_event_mesg(OS_MESG_NOBLOCK))
        return(((LEOCmdHeader *)LEOcur_command)->sense = LEO_SENSE_WAITING_NMI);

    leoAd16WriteIo(ASIC_CMD , asic_cmd );

    /* Wait done */
    if (leoRecv_event_mesg(OS_MESG_BLOCK))
        return(LEO_SENSE_WAITING_NMI);

    /* Check done status */
    done_stat = leoChk_done_status(asic_cmd);

    if( ! ( (done_stat == LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED) 
	   || (done_stat == LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION) ) )
        return(done_stat);

    return(FUNC_OK);
    
}


/* ==========================================================================
* Function : leoDetect_index_w
* --------------------------------------------------------------------------
* Description :  Issue Index lock command , wait done and check error
* --------------------------------------------------------------------------
* IN     : non
* OUT    : non
* ARG    : non
* RET    : 0     - good
*        : not 0 - error sense code
* ==========================================================================
*/
u8  leoDetect_index_w(void)
{
    return leoSend_asic_cmd_w(ASIC_INDEX_LOCK_RETRY, 0);
}

/* ==========================================================================
* Function : leoRecal_i
* --------------------------------------------------------------------------
* Description : Issue Recaliblate command (not wait done)
* --------------------------------------------------------------------------
* IN          : LEOcur_command
* OUT         : NON
* ARG         : NON
* RET         : 0     - GOOD
*             : not 0 - error sense code
* ==========================================================================
*/
u8 leoRecal_i(void)
{
    return leoSend_asic_cmd_i(ASIC_RECAL, 0x00);
}
u8 leoRecal_w(void)
{
    return leoSend_asic_cmd_w(ASIC_RECAL, 0x00);
}

/* ==========================================================================
* Function : leoSeek_i
* --------------------------------------------------------------------------
* Description : Issue seek command (not wait done)
* --------------------------------------------------------------------------
* IN    : LEOcur_command, LEOtgt_param.XXX
* OUT   : non
* ARG   : rwmode - choice read or write
* RET   : 0      - good
*       : not 0  - error sense code
* ==========================================================================
*/
u8 leoSeek_i(u16 rwmode)
{
    u32 tgt_tk;

    /* calc data parameter  */
    tgt_tk = (u32)(((LEOtgt_param.head << 12) + LEOtgt_param.cylinder) << 16);

    if (rwmode == R_MODE)
        return leoSend_asic_cmd_i(ASIC_RD_SEEK, tgt_tk);
    else
        return leoSend_asic_cmd_i(ASIC_WR_SEEK, tgt_tk);
}
u8 leoSeek_w(void)
{
    u8 sksense;
    if (sksense = leoSeek_i(R_MODE))
        return (sksense);
    return leoWait_mecha_cmd_done(ASIC_RD_SEEK);
}

/* ==========================================================================
* Function : leoRecv_event_mesg
* --------------------------------------------------------------------------
* Descriprion :  Wait event que message.
*                Do drive reset if NMI-reset is detected
* --------------------------------------------------------------------------
* IN    : NON
* OUT   : NON
* ARG   : control ( OS_MESG_BLOCK / OS_MESG_NOBLOCK )
* RET   : 0     - GOOD
*       : NOT 0 - NMI_RESET is detected
* ==========================================================================
*/
u8 leoRecv_event_mesg(s32 control)
{
    u32 done_mesg;

    /* WAIT DONE MESSAGE */
    if (osRecvMesg(EVENT_QUE, (OSMesg*)&done_mesg, control) == 0)
    {
        if (done_mesg == (u32)MES_NMI_RESET)
        {
            /* Reset drive if done_mesg is NMI_RESET */
            leoDrive_reset();
            return (0xff);
        }
    }
    return 0;
}

extern u32	currentCommand;

/**********************************************************
* Function : leoChk_err_retry
* ---------------------------------------------------------
* Description : Check retry enable or not .
* IN  : non
* OUT : 
* ARG : sense .. sense code of error.
* RETURN: 0 ...... ENABLE RETRY.
*         NOT 0... DISABLE RETRY.COMMAND SHOULD BE STOP.
**********************************************************/
u32 leoChk_err_retry(u32 sense)
{
    if ( (currentCommand == LEO_COMMAND_READ_DISK_ID) ||
	(currentCommand == LEO_COMMAND_START_STOP) )
    {
	/* read disk id のときは、MEDIUM_MAY_HAVE_CHANGED の場合リトライさせ、
	   次のときに正常終了させる */
	switch (sense)
	{
	  case LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED: /* drive reset */
            unit_atten |= UA_RESET;
/*	  case LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED: */
/*            unit_atten |= UA_MEDIUMCHANGE; */
	  case LEO_SENSE_WAITING_NMI:
	  case LEO_SENSE_DEVICE_COMMUNICATION_FAILURE:
	  case LEO_SENSE_COMMAND_PHASE_ERROR:
	  case LEO_SENSE_MEDIUM_NOT_PRESENT:               /* no disk     */
	  case LEO_SENSE_EJECTED_ILLEGALLY_RESUME:         /* no disk     */
	  case LEO_SENSE_DIAGNOSTIC_FAILURE:
            leoClr_sys_read();
            return -1;
	  default:
            ;
	}
    }
    else
    {
	switch (sense)
	{
	  case LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED: /* drive reset */
            unit_atten |= UA_RESET;
	  case LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED:
            unit_atten |= UA_MEDIUMCHANGE;
	  case LEO_SENSE_WAITING_NMI:
	  case LEO_SENSE_DEVICE_COMMUNICATION_FAILURE:
	  case LEO_SENSE_COMMAND_PHASE_ERROR:
	  case LEO_SENSE_MEDIUM_NOT_PRESENT:               /* no disk     */
	  case LEO_SENSE_EJECTED_ILLEGALLY_RESUME:         /* no disk     */
	  case LEO_SENSE_DIAGNOSTIC_FAILURE:
            leoClr_sys_read();
            return -1;
	  default:
            ;
	}
    }
    
    return 0;
}

/* ==========================================================================
* Function : leoChk_cur_drvmode
* --------------------------------------------------------------------------
* Description : check status and set flags for test unit ready command.
*               leoAnalize_asic_status() must be call before.
* --------------------------------------------------------------------------
* IN    : NON
* OUT   : NON
* ARG   : NON
* RET   : flags for TEST UNIT READY command
* ==========================================================================
*/
u8 leoChk_cur_drvmode(void)
{
    u8  devstat;

    devstat = 0x00;

    /* DISK EXIST ? */
    if (!(asic_cur_status & LEO_STAT_DISK) )
        devstat |= LEO_TEST_UNIT_MR;
    /* HEAD RETRACTED ? */
    if (asic_cur_status & LEO_STAT_HEAD_RETRACT)
        devstat |= LEO_TEST_UNIT_RE;
    /* SPINDLE ON ? */
    if (asic_cur_status & LEO_STAT_SPM_OFF)
        devstat |= LEO_TEST_UNIT_SS;

    return(devstat);
}

/* ==========================================================================
* Function : leoDrive_reset
* --------------------------------------------------------------------------
* Description : Do drive reset .
* --------------------------------------------------------------------------
* IN     : non
* OUT    : non
* ARG    : non
* RET    : non
* ==========================================================================
*/
void leoDrive_reset(void)
{
    leoAd16WriteIo(ASIC_HARD_RESET, ASIC_RESET_CODE);
}

/* ==========================================================================
* Function : leoChkUnit_atten  leoRetUnit_atten  leoSetUnit_atten
* --------------------------------------------------------------------------
* Description : Handle unit attention condition.
* --------------------------------------------------------------------------
* IN     : non
* OUT    : non
* ARG    : non
* RET    : non
* ==========================================================================
*/
u32 leoChkUnit_atten(void)
{
    return unit_atten;
}
u32 leoRetUnit_atten(void)
{
    if (unit_atten & UA_RESET)
    {
        return LEO_SENSE_POWERONRESET_DEVICERESET_OCCURED;
    }
    if (unit_atten & UA_MEDIUMCHANGE)
    {
        return LEO_SENSE_MEDIUM_MAY_HAVE_CHANGED;
    }
    return LEO_SENSE_NO_ADDITIONAL_SENSE_INFOMATION;
}
void leoClrUA_RESET(void)
{
    unit_atten &= ~UA_RESET;
}
void leoClrUA_MEDIUM_CHANGED(void)
{
    unit_atten &= ~UA_MEDIUMCHANGE;
}
void leoSetUA_MEDIUM_CHANGED(void)
{
    unit_atten |= UA_MEDIUMCHANGE;
}
void leoInitUnit_atten(void)
{
#ifdef _LONGCMD
    unit_atten = 0;
#else
    unit_atten = UA_MEDIUMCHANGE;
#endif
}