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/*

 * Project:

 *   Parallel Port S.Ha.R.K. Project

 *

 * Module:

 *   ppDrv.h

 *

 * Description:

 *   file contents description

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors:

 *   Andrea Battistotti <btandrea@libero.it>

 *   Armando Leggio     <a_leggio@hotmail.com>

 *

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 *

 */

/* PPDrv.h

        header file for par port communication...

*/

/*

 * Copyright (C) 2002 Andrea Battistotti , Armando Leggio

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * CVS : $Id: parport.h,v 1.2 2003-02-28 12:05:43 pj Exp $

 */

#include <kernel/kern.h>

#include <drivers/keyb.h>

#include <time.h>

#include <stdio.h>

#include <stdlib.h>

#include <kernel/func.h>

#include <string.h>

#include <ll/ll.h>

#include <kernel/types.h>

#include <kernel/descr.h>

#include <math.h>

/* general defs... */

#define PP_DEBUG   1      /* 1/0  Activate/Disactive internal debugs...     */

#define PP_STATS   1      /* 1/0  Activate/Disactive internal statistics... */

/* return value... */

#define FALSE   0

#define TRUE    1

#define TIMEOUT 2

#define PP_BASE_ADR             0x0378                                          /* std addr for LPT1 */

#define BYTE unsigned char

#define BOOL unsigned char

#define BUF_IDX unsigned int

#define BUF_PNTR unsigned int

#define PIN_MASK unsigned int

#define clock()              sys_gettime(NULL)

enum PIN_STATUS { PIN_OFF ,     PIN_ON } ;             /* positive logic: off==0, on==1 */

/*********************************************************************************/

/* PART 1 : LOW LIVEL FUNC */

/* defs used in ppPinDrv....*/

/* for std & pin use of pp... */

#define PP_DATA_REG     (PP_BASE_ADR+0)             //  address of data register

#define PP_STATUS_REG   (PP_BASE_ADR+1)             //  address of status register

#define PP_CONTR_REG    (PP_BASE_ADR+2)             //  address of control regist

/* out data pins... */

#define PP_PIN_D0                       0x01   /* pin 2 */

#define PP_PIN_D1                       0x02   /* pin 3 */

#define PP_PIN_D2                       0x04   /* pin 4 */

#define PP_PIN_D3                       0x08   /* pin 5 */

#define PP_PIN_D4                       0x10   /* pin 6 */

#define PP_PIN_D5                       0x20   /* pin 7 */

#define PP_PIN_D6                       0x40   /* pin 8 */

#define PP_PIN_D7                       0x80   /* pin 9 */

/* status pins... */

#define PP_PIN_ERROR            0x08   /* pin 15 */

#define PP_PIN_SELECTED         0x10   /* pin 13 */

#define PP_PIN_PAPEROUT         0x20   /* pin 12 */

#define PP_PIN_ACK                      0x40   /* pin 10 */

#define PP_PIN_BUSY             0x80   /* pin 11 */

/* control pins... */

#define PP_PIN_DATASTROBE       0x01   /* pin 1  */

#define PP_PIN_AUTOFEED         0x02   /* pin 14 */

#define PP_PIN_INITOUT          0x04   /* pin 16 */

#define PP_PIN_SELECT           0x08   /* pin 17 */

/* Data i/o */

#define ppSetDataByte(a)             outp(PP_DATA_REG,a)

#define ppReadDataByte()             inp(PP_DATA_REG)

/* this is NOT bidirectional actually: simply read value that I myself wrote on parport early...*/

/* in std lpt you cannot lay down electric pin D0,D1,..D7 from extern and read value in pc...*/

/* this (in std lpt) will broke down lpt port!... */

/* there are obviously also bi-dir port on 8 bit (ECC & ECP) but ctrl & status pins have */

/* different meaning so we don't manage them... See docs. */

/* Data pins */

void ppSetDataPin(int state, PIN_MASK pin);                                             /* in ppPinDrv.c */

#define ppSetPin_D0(a)                          ppSetDataPin(a,PP_PIN_D0)   /* On ==1 , Off == 0 */

#define ppSetPin_D1(a)                          ppSetDataPin(a,PP_PIN_D1)

#define ppSetPin_D2(a)                          ppSetDataPin(a,PP_PIN_D2)

#define ppSetPin_D3(a)                          ppSetDataPin(a,PP_PIN_D3)

#define ppSetPin_D4(a)                          ppSetDataPin(a,PP_PIN_D4)

#define ppSetPin_D5(a)                          ppSetDataPin(a,PP_PIN_D5)

#define ppSetPin_D6(a)                          ppSetDataPin(a,PP_PIN_D6)

#define ppSetPin_D7(a)                          ppSetDataPin(a,PP_PIN_D7)

/* Status pins */

#define ppCheckPin_Error()              (inp(PP_STATUS_REG & PP_PIN_ERROR)!=0?1:0)

#define ppCheckPin_Selected()           (inp(PP_STATUS_REG & PP_PIN_SELECTED)!=0?1:0)

#define ppCheckPin_PaperOut()           (inp(PP_STATUS_REG & PP_PIN_PAPEROUT)!=0?1:0)

#define ppCheckPin_Acknowledge()        (inp(PP_STATUS_REG & PP_PIN_ACK)!=0?1:0)

#define ppCheckPin_Busy()                       (inp(PP_STATUS_REG & PP_PIN_BUSY)!=0?0:1)       /* act low...*/

/* Control pins */

/* Control i/o */

#define ppSetCtrlByte(a)             outp(PP_CONTR_REG,a)

#define ppReadCtrlByte()             inp(PP_CONTR_REG) 

/* idem...*/

void ppSetCtrlPin(int state, PIN_MASK pin);                                                             /* in ppPinDrv.c */

#define ppSetPin_DataStrobe(a)          ppSetCtrlPin(!a,PP_PIN_DATASTROBE)  /* low active...*/

#define ppSetPin_Autofeed(a)            ppSetCtrlPin(!a,PP_PIN_AUTOFEED)    /* low active...*/

#define ppSetPin_InitOut(a)                     ppSetCtrlPin(a,PP_PIN_INITOUT)    

#define ppSetPin_Select(a)                      ppSetCtrlPin(!a,PP_PIN_SELECT)          /* low active...*/

/*********************************************************************************/

/* PART 2 : DATA TRANSFER BETWEEN PC */

/* defs used in ppDrv & ppNRTDrv... */

#define PPDRV_PERIOD          1000                      /* 300000 ok for debug...*/

#define PPDRV_WCET             150                      /* lower bound: 120; more if debug & stats are on...*/

#define PP_BUF_LEN            1024                      /* between 2^2 and 2^16 (64k) */

#define CLK_TIMEOUT          55000                      /* timeout for sync pc-pc...*/

/* for laplink use of std pp... */

#define TX_PORT                         PP_BASE_ADR                     /* transmit port */

#define RX_PORT                         TX_PORT+1                       /* receive port  */

/*  laplink bit mask */

#define TX_DATA                         0x0F                                    /* 0000 1111 pin 2,3,4,5 */

#define TX_CTR                          0x10                                    /* 0001 0000 bit 4 port TX pin 6*/

#define RX_DATA                         0x78                                    /* 0111 1000 pin 15,13,12,10 */

#define RX_CTR                          0x80                                    /* 1000 0000 bit 7 port RX pin 11*/

#define LSN                             0x0F                                    /* 0000 1111 low significative nibble */

#define MSN                             0xF0                                    /* 1111 0000 most significative nibble */

#define BYTE_CTR                        0xAF                                    /* 1010 1111 control char */

/* comm protocol */

#define ppSendRTS()          ppSetOnPinTX_CTR()

#define ppIsRTS()            ppReadIfPinRX_CTRIsOn()

#define ppSendOTS()          ppSetOnPinTX_CTR()

#define ppIsOTS()            ppReadIfPinRX_CTRIsOn()

#define ppSendDR()           ppSetOffPinTX_CTR()

#define ppIsDR()             ppReadIfPinRX_CTRIsOff()

#define ppSendER()           ppSetOffPinTX_CTR()

#define ppIsER()             ppReadIfPinRX_CTRIsOff()

#define ppSetOnPinTX_CTR()          outp(TX_PORT,(inp(TX_PORT)|TX_CTR))          /* used by: ppSendRTS ppSendOTS */

#define ppSetOffPinTX_CTR()         outp(TX_PORT,(inp(TX_PORT)&(~TX_CTR)))       /* used by: ppSendDR ppSendER */

#define ppReadIfPinRX_CTRIsOn()     ((((~inp(RX_PORT))&RX_CTR)==0)?FALSE:TRUE)

#define ppReadIfPinRX_CTRIsOff()    (((BYTE)((~RX_CTR)|(~inp(RX_PORT)))==0x7F)?TRUE:FALSE)

/* Funct Return Code */

enum PP_COMM_RTR_CODE {

  PP_COMM_OK,

  PP_COMM_NOREADYBYTES_EXC,

  PP_COMM_NOFREEBYTES_EXC

};

/* Funct Return Code */

enum PP_SYSMSG_RTR_CODE {

  PP_SYSMSG_OK,

  PP_NOSYSMSG_EXC,

  PP_NOFREEMSG_EXC

};

/* NON REAL TIME (== BLOCK) functions...*/

/* from ppNRTDrv.c...*/

BOOL ppNRTOpenComm(void);

BOOL ppNRTWaitRTS(void);

BOOL ppNRTWaitDR(void);

BOOL ppNRTWaitOTS(void);

BOOL ppNRTWaitER(void);

BOOL ppNRTTxOneByte(BYTE c);

BOOL ppNRTRxOneByte(BYTE *c);

/* REAL TIME (== NON BLOCK) POLLING SERVER */

/* from ppDrv.c... */

void ppInitDrv(void (*pf)(char *));                   /* NRT: to be called before start ppPollingSrv...*/

TASK ppPollingSvr(void *arg);   /* periodic task to be started before any call to Rx/Tx...*/

/* input output function */

int ppRxOneByte(BYTE *c);                    /* retrive 1 byte */

int ppTxOneByte(BYTE c);                     /* send 1 byte */

int ppRxBytes(BYTE *c, unsigned int nbyte);  /* retrive n byte... */

int ppTxBytes(BYTE *c, unsigned int nbyte);  /* send n byte... */

/* System msg */

#define SYS_MSG_COLS 33

#define SYS_MSG_LINS 15

int ppReadSysMsg(char * buf);

int ppWriteSysMsg(char * buf, ...);