vportdis.c

TI DM642 DSP 驱动CMOS 成像芯片MT9T001(Micron)源代码,TI原版资料.包含驱动环境配置,对如基于DSP的数码相机,摄像机开发有重要参考价值.

/*
 *  Copyright 2004 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */

/* DSP/BIOS standard include files */
#include <std.h>
#include <mem.h>
#include <que.h>    
#include <tsk.h>

/* Chip-support library include files */
#include <csl.h>
#include <csl_edma.h>
#include <csl_vphal.h>         
#include <csl_irq.h>

/* IOM/GIO driver model include files */
#include <iom.h>
#include <fvid.h>                       

/* video driver specif-ic include files */
#include <vport.h>
#include <vportdis.h>
#include <edc.h>
#include "_vport.h"

/* debug include files */
/* to minimize code size and cycle count overhead of the driver */             
/* error checking is only performed at debug time               */
#include <assert.h>


/* mini-driver API functions */
static Int mdBindDev(Ptr *devp, Int devid, Ptr devParams);
static Int mdControlChan(Ptr chanp, Uns cmd, Ptr args);
static Int mdCreateChan(Ptr *chanp, Ptr devp, String name, Int mode,
        Ptr chanParams, IOM_TiomCallback cbFxn, Ptr cbArg);
static Int mdDeleteChan(Ptr chanp);
static Int mdSubmitChan(Ptr chanp, IOM_Packet *packet);


/* local functions */
static Int _configChan(Ptr chanp, Ptr args);
static Int _configEDMA(Ptr chanp, VPORTDIS_Params *params);
static Int _configPort(Ptr chanp, Ptr args);
static Int _configRegs(Ptr chanp, VPORTDIS_Params *params);
static void displayEdmaISR(Int tcc);
static void displayISR(int portNum);
static Int _displayStart(Ptr chanp);
static Int _displayStop(Ptr chanp);
static Int _dundRecover(Ptr chanp);
static Int _setVIntCb(Ptr chanp, Ptr args);


/* global and static variables */
IOM_Fxns VPORTDIS_Fxns = {
	mdBindDev,    
	(IOM_TmdUnBindDev)IOM_mdNotImpl,
	mdControlChan,
	mdCreateChan,
	mdDeleteChan,
	mdSubmitChan
};

/**************************************************************
 * Static allocation and initialization of port objects       *
 * as display supports only 1 channel, the same channel       *
 * object for capture is used here for the whoel port         *
 **************************************************************/
_VPORT_ChanObj chanObjs[_VP_PORT_CNT] = {
    {0, 0, 0, _VP_BASE_PORT0, EDMA_CHA_VP0EVTYA, EDMA_CHA_VP0EVTUA, 
        EDMA_CHA_VP0EVTVA, _VP_YDSTA0_ADDR, _VP_CBDST0_ADDR, _VP_CRDST0_ADDR}, 
    {0, 1, 0, _VP_BASE_PORT1, EDMA_CHA_VP1EVTYA, EDMA_CHA_VP1EVTUA, 
        EDMA_CHA_VP1EVTVA,  _VP_YDSTA1_ADDR, _VP_CBDST1_ADDR, _VP_CRDST1_ADDR}, 
    {0, 2, 0, _VP_BASE_PORT2, EDMA_CHA_VP2EVTYA, EDMA_CHA_VP2EVTUA, 
        EDMA_CHA_VP2EVTVA, _VP_YDSTA2_ADDR, _VP_CBDST2_ADDR, _VP_CRDST2_ADDR },
};     



/*
 *  ======== mdBindDev ========
 *  Register all external devices to video port display driver 
 */
static Int mdBindDev(Ptr *devp, Int devid, Ptr devParams)
{
   Int portNum = devid;
   volatile Int i;
   volatile Int* base = (volatile Int *)chanObjs[portNum].base;                       
   
   
   assert(portNum < _VP_PORT_CNT);
   base[_VP_VPCTL_OFFSET] = 
             VP_VPCTL_VPRST_RESET << _VP_VPCTL_VPRST_SHIFT;
   for(i = 0; i < 100000; i ++);      
    *devp = &chanObjs[portNum];                                                                                           
   return mdControlChan(&chanObjs[portNum], 
           VPORT_CMD_CONFIG_PORT, devParams);
}


/*
 *  ======== mdControlChan ========
 */
static Int mdControlChan(Ptr chanp, Uns cmd, Ptr args)
{
    Int retVal = IOM_COMPLETED;
    _VPORT_ChanObj* chan = (_VPORT_ChanObj *)chanp;
    
    /* command dispatcher */
    switch (cmd){
        case VPORT_CMD_START:
        retVal = _displayStart(chanp);
        break;
        case VPORT_CMD_STOP:
        retVal = _displayStop(chanp);
        break;
        case VPORT_CMD_CONFIG_CHAN:
        retVal = _configChan(chanp, args);
        break;
        
        case VPORT_CMD_SET_VINTCB:
        _setVIntCb(chanp, args);
        break;
        case VPORT_CMD_DUND_RECOVER:
        retVal = _dundRecover(chanp);
        break;
        case VPORT_CMD_CONFIG_PORT:
        retVal = _configPort(chanp, args);
        break;
        default:
        if(chan->edcFxns!=INV) {
            retVal =  chan->edcFxns->ctrl(chan->edcHandle, 
                cmd-VPORT_CMD_EDC_BASE,(Arg)args);
        }else {
            retVal = IOM_ENOTIMPL;
        }
   }    
   return retVal;
}              


/*
 *  ======== mdCreateChan ========
 *  create a channel
 */
static Int  mdCreateChan(Ptr *chanp, Ptr devp, String name, Int mode,
              Ptr chanParams, IOM_TiomCallback cbFxn, Ptr cbArg)
{
    _VPORT_ChanObj* chan;
    Int retVal = IOM_COMPLETED;   
    Int j;     

    if(mode != IOM_OUTPUT){
        return IOM_EBADARGS;
    }
    
    chan = (_VPORT_ChanObj *)devp;
    if(chan->edcFxns != INV) {
        /* open external device */
        chan->edcHandle 
           = chan->edcFxns->open(name, (Arg)INV);
    } 
    if(! (chan->status & _VPORT_OPENED)) {
        chan->status |= _VPORT_OPENED;
        
        chan->vIntMask = 0;
        QUE_new(&chan->qIn);
        QUE_new(&chan->qOut);
        chan->cbFxn = cbFxn;
        chan->vIntFxn = (VPORT_IntCallBack)INV;
        chan->queEmpty = FALSE;   
        chan->cbArg = (Arg)cbArg;
        chan->packetIOM = INV;     
        chan->vIntCbArg = (Int)INV;        
        chan->bufSz = 0;
        for(j = 0; j < _VPORT_NUM_EDMA_CHANS 
          && retVal == IOM_COMPLETED; j ++ ) {
            if((chan->hEdma[j] = 
             EDMA_open(chan->edmaChanNum[j], EDMA_OPEN_RESET)) == EDMA_HINV
             || (chan->hRld[2 * j] = EDMA_allocTable(-1)) == EDMA_HINV 
             || (chan->hRld[2 * j + 1] =EDMA_allocTable(-1)) == EDMA_HINV 
             || (chan->tcc[j] = EDMA_intAlloc(chan->edmaChanNum[j])) == -1){
                retVal = IOM_EALLOC;
            }/* if((chan->...*/ 
        }/* for(j = 0; j < NUM_EDMA_CHANS; j++) {...*/
        /* if EDMAs are not allocated successfully, */
        /* delete the channel just created          */
        if(retVal == IOM_COMPLETED && (void *)chanParams != INV) {
            retVal = mdControlChan(chan, VPORT_CMD_CONFIG_CHAN, chanParams); 
        }
        if(! retVal) {
             /* configure the channel */
             *chanp = chan;
        }else {
            mdDeleteChan(chan);
            *chanp = INV;
        }               
    } /*if(!chan->opened) */
    return retVal;
}               

/*
 *  ======== mdDeleteChan ========
 *  delete the channel
 */

static Int  mdDeleteChan(Ptr chanp)
{
    _VPORT_ChanObj* chan = (_VPORT_ChanObj* )chanp;
    Int j;
    volatile Int* base;
    
    if(chan->status & _VPORT_OPENED) {
        chan->status = 0;
        mdControlChan(chanp, VPORT_CMD_STOP, NULL);
        for(j = 0; j < _VPORT_NUM_EDMA_CHANS; j ++) {
            EDMA_close(chan->hEdma[j]);
            EDMA_freeTable(chan->hRld[2 * j]);
            EDMA_freeTable(chan->hRld[2 * j + 1]);
            EDMA_intFree(chan->tcc[j]);
        }      
        for(j = 0; j < chan->numFrms ; j ++) {
            MEM_free(chan->segId, chan->viops[j].frame.iFrm.y1, chan->bufSz);
        }        
        
        base = (volatile Int *)chan->base;
        /* reset display */
        base[_VP_VDCTL_OFFSET] |= 
            VP_VDCTL_RSTCH_RESET << _VP_VDCTL_RSTCH_SHIFT;
        /* reset video port */
        base[_VP_VPCTL_OFFSET] |= 
            VP_VPCTL_VPRST_RESET << _VP_VPCTL_VPRST_SHIFT;
        
        chan->status = 0;
        /* close external device */
        if(chan->edcFxns != INV) {
            chan->edcFxns->close(chan->edcHandle);
        }
        
    }    
    return IOM_COMPLETED;
}


/*
 *  ======== mdSubmitChan ========
 */
static Int  mdSubmitChan(Ptr chanp, IOM_Packet *packet)
{

    _VPORT_ChanObj* chan = (_VPORT_ChanObj *)chanp;
    FVID_Frame* viop;                             
    Int retVal = IOM_PENDING;
    Uint32 gie = IRQ_globalDisable();     
    
    
    if(packet->cmd != FVID_ALLOC) {/* FVID_FREE or FVID_EXCHANGE */
        viop = *(void **)packet->addr; /* pointer of a video I/O packet */
        if(chan->queEmpty) {
            /* don't put it into queue, update the rld register directly */
            chan->queEmpty = FALSE;                   
        }
        QUE_enqueue(&chan->qIn, (QUE_Handle)viop);        
        retVal = packet->status = IOM_COMPLETED;
    }
    if(packet->cmd != FVID_FREE) { /* FVID_ALLOC or FVID_EXCHANGE */
        if(chan->packetIOM == INV){
            if((viop = (FVID_Frame *)QUE_dequeue(&chan->qOut))
                !=(FVID_Frame *)&chan->qOut) {
                /* only when there is no outstanding pending request */
                *(void **)packet->addr = (void *)viop;
                packet->size = sizeof(FVID_Frame);
                retVal = packet->status = IOM_COMPLETED;
            }
            else {
                chan->packetIOM = packet;
                retVal = packet->status = IOM_PENDING;
            }
        }else retVal = IOM_EINUSE;    
                    
    }    
    IRQ_globalRestore(gie);
    return retVal;
}


/*
 *  ========  _configChan ========
 */
static Int _configChan(Ptr chanp, Ptr args)
{
    _VPORT_ChanObj* chan = (_VPORT_ChanObj *)chanp;
    VPORTDIS_Params*   params = (VPORTDIS_Params* )args; 
    Int retVal;           
    
    
    if(!(chan->status & _VPORT_CFGED)) {
        /* configure video port channel A/B control register */
        _configRegs(chanp, params);
        /* configure EDMA and frame buffer */
        retVal = _configEDMA(chanp, params);
    } else {
        retVal = IOM_EINUSE;
    }    
    return retVal;
}                     


/*
 *  ======== _configEDMA ========
 */
static Int _configEDMA(Ptr chanp, VPORTDIS_Params *params)
{
    _VPORT_ChanObj* chan = (_VPORT_ChanObj *)chanp;
    Int i;
    EDMA_Config  cfgEdma;
    Int thrld;
    Int edmaChans;