adv601.c

视频601芯片的驱动源码,你可以完全掌控该芯片了,对于其它多媒体芯片的设计具有参考价值

/*------------------------------------------------------------------------

$Workfile: ADV601.C $
$Date: 6/20/97 3:46p $
$Revision: 27 $
* Purpose:  
*           ADV601 Wavelet Compression Chip support routines
* Notes:       
*           mcsr register is a "write only" register and a read only 
*           register with the same address.  Do not do read-modify-write
*           operations on the mcsr register.  To set a single bit, call the
*           set_mcsrbit and clr_mcsrbit routines.
*
$History: ADV601.C $
 * 
 * *****************  Version 27  *****************
 * User: Stevel       Date: 6/20/97    Time: 3:46p
 * Updated in $/601cman
 * Add new header vlab.h
 * 
 * *****************  Version 26  *****************
 * User: Stevel       Date: 1/07/97    Time: 6:33p
 * Updated in $/601cman
 * Add a new function to read in FIFO threshold from a text file for H.W.
 * trouble shooting purpose !
 * 
 * *****************  Version 25  *****************
 * User: Dstarr       Date: 10/25/96   Time: 1:48p
 * Updated in $/601cman
 * Put bits per pixel into the compression ratio register for the DSP.
 * 
 * *****************  Version 24  *****************
 * User: Dstarr       Date: 10/08/96   Time: 9:53a
 * Updated in $/601cman
 * Support DSP bin width calc bit in the ADV601 mode control register.  
 * 
 * *****************  Version 23  *****************
 * User: Dstarr       Date: 8/07/96    Time: 1:26p
 * Updated in $/601cman
 * Support Phillips mode
 * 
 * *****************  Version 22  *****************
 * User: Stevel       Date: 7/24/96    Time: 8:45p
 * Updated in $/601cman
 * Minor code change in wavelet_init() to help fixing the problem of
 * capturing in PAL mode.
 * 
 * *****************  Version 21  *****************
 * User: Dstarr       Date: 7/01/96    Time: 9:23a
 * Updated in $/601cman
 * Support Cropping registers.
 * 
 * *****************  Version 20  *****************
 * User: Stevel       Date: 6/23/96    Time: 9:25p
 * Updated in $/601cman
 * Add changes to support run time Bin Width Calculation.
 * 
 * *****************  Version 19  *****************
 * User: Stevel       Date: 6/06/96    Time: 1:46p
 * Updated in $/601cman
 * Add a new parameter for programming ADV601 FIFO threshold.
 * 
 * *****************  Version 18  *****************
 * User: Dstarr       Date: 6/06/96    Time: 9:41a
 * Updated in $/601cman
 * dma_init() no longer stuffs fifo by hand before going to bus master
 * mode.
 * 
 * *****************  Version 17  *****************
 * User: Dstarr       Date: 5/29/96    Time: 8:32a
 * Updated in $/601cman
 * Add new function dma_init for bus master support.  Clean up a few
 * comments.  This dma_init coudl actually move 74 long words into the
 * ADV601 fifo by DMA and get them back.  DMA stopped after 74 long words
 * cause FIFO_SRQ went away for reasons unknown at this time.
 * 
 * 
 * *****************  Version 16  *****************
 * User: Stevel       Date: 5/17/96    Time: 5:05p
 * Updated in $/601cman
 * Demo version.
 * 
 * *****************  Version 15  *****************
 * User: Stevel       Date: 5/04/96    Time: 7:49p
 * Updated in $/601cman
 * Change the FIFO threshold back to half full !
 * 
 * *****************  Version 14  *****************
 * User: Stevel       Date: 5/04/96    Time: 11:26a
 * Updated in $/601cman
 * Change the Encode FIFO Threshold to 3/4 FULL.
 * 
 * *****************  Version 13  *****************
 * User: Stevel       Date: 4/20/96    Time: 11:26a
 * Updated in $/601cman
 * Minor changes in wavelet_init().
 * 
 * *****************  Version 12  *****************
 * User: Stevel       Date: 4/15/96    Time: 7:48p
 * Updated in $/601cman
 * Change wavelet_init() to initialize ADV601 in master and unicolor mode.
 * 
 * *****************  Version 11  *****************
 * User: Dstarr       Date: 4/13/96    Time: 12:17p
 * Updated in $/601cman
 * Wavelet Init now sets FIFO trip points to half way up the FIFO (256)
 * words.  When FIFO service request is asserted, you  can write 256
 * longwords into the FIFO.
 * 
 * *****************  Version 10  *****************
 * User: Stevel       Date: 4/10/96    Time: 3:41p
 * Updated in $/601cman
 * Add Stop() in wavelet_init() to disable interrupt before init. ADV601.
 * 
 * *****************  Version 9  *****************
 * User: Stevel       Date: 4/09/96    Time: 7:35p
 * Updated in $/601cman
 * Change the Interrupt polarity to active high in wavelet_init().
 * 
 * *****************  Version 8  *****************
 * User: Dstarr       Date: 4/09/96    Time: 9:26a
 * Updated in $/601cman
 * This version does NOT do anything with the test register at 180 hex.
 * Attempts to zero same seemed (haven't tested enough to be SURE) to
 * cause host computer lockup.
 * 
 * *****************  Version 7  *****************
 * User: Dstarr       Date: 4/05/96    Time: 4:17p
 * Updated in $/601cman
 * Fixed sense of encode/decode in wavelet init.  S_Capture now puts the
 * chip into ENCODE mode.  All else is DECODE.  Previous versions had this
 * backwards.
 * 
 * 
 * *****************  Version 6  *****************
 * User: Dstarr       Date: 4/05/96    Time: 11:31a
 * Updated in $/601cman
 * Improved wavelet init.  Runs in lab.
 * 
 * *****************  Version 5  *****************
 * User: Dstarr       Date: 4/03/96    Time: 11:54a
 * Updated in $/601cman
 * Fix bug in rite_wave_chip.  We now see good data driven out the data
 * bus on a rite cycle with the logic analyser.
 * 
 * *****************  Version 4  *****************
 * User: Dstarr       Date: 3/13/96    Time: 5:06p
 * Updated in $/601cman
 * Checked out in lab.  601test can play beauty thru the DLL.
 * 
 * *****************  Version 3  *****************
 * User: Stevel       Date: 3/11/96    Time: 7:32p
 * Updated in $/601cman
 * Rename bw_calulator_input() to bw_calculator_input().
 * Change both bw_calculator_input and bw_calculator_output() not 
 * to perform byte swap when accessing ADV601.
 * 
 * *****************  Version 1  *****************
 * User: Stevel       Date: 3/06/96    Time: 8:08p
 * Created in $/601cman
 * Initial release

  
    This code and information is provided "as is" without warranty of any
    kind, either expressed or implied, including but not limited to the
    implied warranties of merchantability and/or fitness for a particular
    purpose.
  
    1995 Analog Devices, Inc. 
  
-------------------------------------------------------------------------*/
#include <windows.h>
#include <stdio.h>
#include "globsym.h"
#include "amcc.h"
#include "vxdmsg.h"
#include "bw.h"
#include "adv601.h"
#include "601error.h"
#include "capplybk.h"
#include  "601cman.h"
#include "vlab.h"
#include "i2c.h"


#pragma warning(disable : 4273)       /* Suppress dll export assumed warning.
                                        We are a dll, we always export and
                                        never import */
extern  int hstart;
extern  int hend;
extern  int vstart;
extern  int vend;
extern  int dsp_bpp;                    /* bits per pixel for the dsp */

extern	word 	med_bw[84];

ADV601_REG  init_601;


/*      pointers to Eval card hardware  

    Note:  

*/

static dword *      ptr2addr;       // ADV601 SubAddress Reg. address
static dword *      ptr2data;       // ADV601 Data Reg. address
static dword *      ptr2mcsr;       // ADV601 Interrupt mask and status Reg.



////////////////////////////////////////////////////////////////////////////
// In line function to perform byte swap
////////////////////////////////////////////////////////////////////////////
_inline word byte_swap(word WordIn)
{
    byte    LoByte, HiByte;

    LoByte = (byte)WordIn; 
    HiByte = (byte)(WordIn >> 8);
    return (LoByte << 8)| HiByte;       
};


DLLEXPORT int   wavelet_init(	int videoformat, 
								int direction, 
								byte fifo_threshold ,
								EV601 * ptr2ptrs, 
								word * bwc_array)
/******************************************************************
Processing:     Initialize ptrs and write all 601 registers.  Reset bit
                should be asserted while programming ADV601 control registers
                and removed while all is ready to run.  It is best to first
                assert reset WITHOUT the encode bit.  In encode, ADV601 logic
                waits for end of frame, to avoid torn frames at the end of
                a video clip going to disk.  This may result in reset not
                taking effect for one whole frame time (30 msec).
                Decode mode does NOT wait for end of frame, it resets
                immediately.
Inputs:         videoformat contains bits PAL, DSP_BWC, and PHILLIPS
                PHILLIPS and DSP_BWC are hardware test bits usually off.
                direction is true (playback)  or false (record)
Outputs:        return success 
Side-effects    None.
*******************************************************************/
{
    int rtnvar, i;
#if LATER
    word    test_reg;
#endif
    
    // Setup the ADV601 register address pointer
    ptr2addr =  ptr2ptrs->logicBAR1;
    ptr2data = ptr2ptrs->logicBAR2;
    ptr2mcsr =  ptr2ptrs->logicBAR4;

	// Stop interrupt if it happens
	Stop();
    
    memset (&init_601,0,sizeof(init_601)); /* Turn all bits OFF */
    init_601.mode_ctl =  RESET_601;     /* Reset AND DECODE MODE */
    rtnvar = rite_wavelet_chip(&init_601,0,1 );  /* Reset sluggish in ENCODE*/

    init_601.mode_ctl =  RESET_601 | HIRQ_ACT_HI_601 | UNI_COLOR_601 ;

                                         // Stay in reset while
    if (videoformat  &  PAL)             /* programming all ctl regs */
        init_601.mode_ctl |= PAL_601;
    if (videoformat & DSP_BWC)          /* if DSP does BWC */
        init_601.mode_ctl |= DSP_601;   /* then enable serial port */
    if (videoformat & PHILLIPS)         /* Special hardware test feature */
    {
        init_601.mode_ctl |= PLAIN_PHILLIPS ;
        if (direction == S_Capture)
            init_601.mode_ctl |= PHSYNC;
        else
            init_601.mode_ctl |= MASTER_601;
    }
    else                                /* Usual case */
        init_601.mode_ctl |= CCIR_656 | MASTER_601;
        
    if (direction == S_Capture)