ucb1400_touch.c

pxa270触摸屏驱动程序

/******************************************************************************
**
**  COPYRIGHT (C) 2000, 2001 Intel Corporation.
**
**  This software as well as the software described in it is furnished under
**  license and may only be used or copied in accordance with the terms of the
**  license. The information in this file is furnished for informational use
**  only, is subject to change without notice, and should not be construed as
**  a commitment by Intel Corporation. Intel Corporation assumes no
**  responsibility or liability for any errors or inaccuracies that may appear
**  in this document or any software that may be provided in association with
**  this document.
**  Except as permitted by such license, no part of this document may be
**  reproduced, stored in a retrieval system, or transmitted in any form or by
**  any means without the express written consent of Intel Corporation.
**
**  FILENAME:  		UCB1400_touch.c
**
**  PURPOSE:        This is the TouchScreen driver code.
**
**  LAST MODIFIED:  $Modtime: 7/17/03 1:01p $
******************************************************************************/

/************* HEADER FILES *************/

#include "systypes.h"
#include "dm_errors.h"
#include "timedelays.h"
#define UCB1400_TOUCH_GLOBALS
#include "Ucb1400_Touch.h"
#include "Ucb1400.h"
#include "Ac97MixerRegsApi.h"
#include "XsAc97CtrlApi.h"
//#include "BoardControl.h"
//#include "XsPwm.h"

/************* LOCAL DEFINITIONS *************/

#define RETRIES 10

/************* GLOBAL VARIABLES *************/

UINT ucb1400rev = REVISIONUNKNOWN;

/************* GLOBAL FUNCTIONS *************/

/*
*******************************************************************************
*
* FUNCTION:         TS_HWSetup
*
* DESCRIPTION:      Setup the Touchscreen controller.
*
* INPUT PARAMETERS:	None.
*
* RETURNS:			ErrorT - Status.
*
* GLOBAL EFFECTS:	None.
*
* ASSUMPTIONS:		None.
*
* CALLS:            None.
*
* CALLED BY:        System.
*
* PROTOTYPE:        ErrorT TS_HWSetup(void)
*
*******************************************************************************
*/

ErrorT TS_HWSetup(void)
{
    ErrorT retVal;
    UINT data;

   // PostDisplayProgress(ERR_L_TS, 1, 0);
    // Turn on the ADC
    retVal = XsAc97CtrlWriteCodecReg (
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_ADCCR,
        UCB_ADCCR_AE
    );
    if (retVal != ERR_NONE) return retVal;

  //  PostDisplayProgress(ERR_L_TS, 1, 1);
    // Get the contents of the reset register.
    retVal = XsAc97CtrlReadCodecReg (
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_RR,
        &data
    );
    if (retVal != ERR_NONE) return retVal;

    if (data == (UCB_RR_LOUDNESS | UCB_RR_20BITDAC | UCB_RR_20BITADC))
        ucb1400rev = REVISION2A;
    else
        ucb1400rev = REVISION1B;
    return (retVal);
}

/*
*******************************************************************************
*
* FUNCTION:         TS_SWInit
*
* DESCRIPTION:      Init the Touchscreen driver internal variables.
*
* INPUT PARAMETERS:	None.
*
* RETURNS:			Nothing.
*
* GLOBAL EFFECTS:	None.
*
* ASSUMPTIONS:		None.
*
* CALLS:            None.
*
* CALLED BY:        System.
*
* PROTOTYPE:        void TS_SWInit(void)
*
*******************************************************************************
*/

void TS_SWInit(void)
{
   // PostDisplayProgress(ERR_L_TS, 2, 0);
}

/*
*******************************************************************************
*
* FUNCTION:         TS_GetPenStatus
*
* DESCRIPTION:      Get the Penup/Pendown status.
*
* INPUT PARAMETERS:	None.
*
* RETURNS:			ErrorT - Status.
*
* GLOBAL EFFECTS:	None.
*
* ASSUMPTIONS:		None.
*
* CALLS:            None.
*
* CALLED BY:        System.
*
* PROTOTYPE:        ErrorT TS_GetPenStatus(void)
*
*******************************************************************************
*/

ErrorT TS_GetPenStatus(void)
{
    UINT data, retVal;

   // PostDisplayProgress(ERR_L_TS, 4, 0);
// Watch the PENUP/PENDOWN State.
    retVal = XsAc97CtrlWriteCodecReg (
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_TSCR,
        ucb1400rev==REVISION1B ?
            UCB_TSCR_TSMY_GND | UCB_TSCR_TSPY_GND | UCB_TSCR_BIAS :
            UCB_TSCR_TSMX_POW | UCB_TSCR_TSPX_POW | UCB_TSCR_TSMY_GND | UCB_TSCR_TSPY_GND
    );
  //  PostDisplayProgress(ERR_L_TS, 4, 1);
    if (retVal != ERR_NONE) return (retVal);

    DM_WaitMs(3);

  //  PostDisplayProgress(ERR_L_TS, 4, 2);
// Read the PENUP/PENDOWN State.
    retVal = XsAc97CtrlReadCodecReg (
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_TSCR,
        &data
    );
 //   PostDisplayProgress(ERR_L_TS, 4, 3);
    if (retVal != ERR_NONE) return (retVal);

    if ((data & UCB_TSCR_PX) || (data & UCB_TSCR_MX)) {
  //      PostDisplayProgress(ERR_L_TS, 4, 4);
        return (TS_PENUP);
    }
  //  PostDisplayProgress(ERR_L_TS, 4, 5);
    return (TS_PENDOWN);
}

/*
*******************************************************************************
*
* FUNCTION:         TS_GetRaw
*
* DESCRIPTION:      Get the raw Pen coordinates.
*
* INPUT PARAMETERS:	UINT16 *x - Pointer for "X" coordinate return.
*                   UINT16 *y - Pointer for "Y" coordinate return.
*
* RETURNS:			ErrorT - Status.
*                   UINT16 *x - "X" coordinate.
*                   UINT16 *y - "Y" coordinate.
*
* GLOBAL EFFECTS:	None.
*
* ASSUMPTIONS:		None.
*
* CALLS:            None.
*
* CALLED BY:        System.
*
* PROTOTYPE:        ErrorT TS_GetRaw(UINT16 *x, UINT16 *y)
*
*******************************************************************************
*/

ErrorT TS_GetRaw(UINT16 *x, UINT16 *y)
{
    ErrorT retVal;
    UINT data, timeout;
   //backlight off
  // XsPwmWriteDuty(0, 0x0);

 //   PostDisplayProgress(ERR_L_TS, 3, 0);
    retVal = XsAc97CtrlWriteCodecReg ( // Read the "X" coordinate.
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_TSCR,
        UCB_TSCR_BIAS | UCB_TSCR_POSMO | UCB_TSCR_TSPX_POW | UCB_TSCR_TSMX_GND
    );
    
 //   PostDisplayProgress(ERR_L_TS, 3, 1);
    if (retVal != ERR_NONE) return (retVal);

    DM_WaitMs(3);
   

    retVal = XsAc97CtrlWriteCodecReg ( // Start the conversion.
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_ADCCR,
        UCB_ADCCR_AE | UCB_ADCCR_AS | UCB_ADCCR_AI_TSMY
    );
  //  PostDisplayProgress(ERR_L_TS, 3, 2);
    if (retVal != ERR_NONE) return (retVal);

    timeout = RETRIES;

    do {
        if (!(timeout--))
            return ERRORCODEX(ERR_L_TS, 3, 3, ERR_T_TIMEOUT); // Touchscreen ADC never done!

        DM_WaitUs(10);
        retVal = XsAc97CtrlReadCodecReg ( // Get the result.
            XS_AC97CTRL_CM_ID_PRI_CODEC,
            UCB_ADCDR,
            &data
        );
        if (retVal != ERR_NONE) return (retVal);

    } while (!(data & UCB_ADCDR_ADV)); // Wait for done bit.

 //   PostDisplayProgress(ERR_L_TS, 3, 4);
    *x = data & UCB_ADCDR_MASK;

    retVal = XsAc97CtrlWriteCodecReg ( // Read the "Y" coordinate.
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_TSCR,
        UCB_TSCR_BIAS | UCB_TSCR_POSMO | UCB_TSCR_TSPY_POW | UCB_TSCR_TSMY_GND
    );
//    PostDisplayProgress(ERR_L_TS, 3, 5);
    if (retVal != ERR_NONE) return (retVal);
    DM_WaitMs(3);
    retVal = XsAc97CtrlWriteCodecReg ( // Start the conversion.
        XS_AC97CTRL_CM_ID_PRI_CODEC,
        UCB_ADCCR,
        UCB_ADCCR_AE | UCB_ADCCR_AS | UCB_ADCCR_AI_TSMX
    );
//    PostDisplayProgress(ERR_L_TS, 3, 6);
    if (retVal != ERR_NONE) return (retVal);

    timeout = RETRIES;

    do {
        if (!(timeout--))
            return ERRORCODEX(ERR_L_TS, 3, 7, ERR_T_TIMEOUT); // Touchscreen ADC never done!

        DM_WaitUs(10);

        retVal = XsAc97CtrlReadCodecReg ( // Get the result.
            XS_AC97CTRL_CM_ID_PRI_CODEC,
            UCB_ADCDR,
            &data
        );

        if (retVal != ERR_NONE) return (retVal);

    } while (!(data & UCB_ADCDR_ADV)); // Wait for done bit.

//    PostDisplayProgress(ERR_L_TS, 3, 8);
    *y = data & UCB_ADCDR_MASK;
    //backlight on
   // XsPwmWriteDuty(0, 0x3FF);
    
    
    return ERR_NONE;
}