syscon_tty.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  syscon_tty.c
 *
 *  Non platform specific TTY parts of SYSCON module
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
 * documentation or other commercial items. If the user of this information, or 
 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/


/************************************************************************
 *  Include files
 ************************************************************************/

#include <sysdefs.h>
#include <syscon_api.h>
#include <syscon.h>

/************************************************************************
 *  Definitions
 ************************************************************************/

/************************************************************************
 *  Public variables
 ************************************************************************/

/************************************************************************
 *  Static variables
 ************************************************************************/

/* Parameters for registered functions */
static UINT8 tty0 = 0;
static UINT8 tty1 = 1;

/* Current values of TTY0(0)/TTY1(1) parameters */
static UINT8  baudrate[2];
static UINT8  databits[2];
static UINT8  parity[2];
static UINT8  stopbits[2];
static UINT8  flowctrl[2];

/************************************************************************
 *  Static function prototypes
 ************************************************************************/

/************************************************************************
 *  Implementation : Static functions
 ************************************************************************/


/************************************************************************
 *  Implementation : Static functions registered for handling particular 
 *  SYSCON objects for particular platform(s)
 ************************************************************************/


/************************************************************************
 *  com_tty_baudrate_generic_read
 ************************************************************************/
static UINT32
com_tty_baudrate_generic_read(
    void *param,
    void *data )
{
    *(UINT8 *)param = baudrate[*(UINT8 *)data];
    return OK;
}


/************************************************************************
 *  com_tty_baudrate_generic_write
 ************************************************************************/
static UINT32
com_tty_baudrate_generic_write(
    void *param,
    void *data )
{
    baudrate[*(UINT8 *)data] = *(UINT8 *)param;
    return OK;
}


/************************************************************************
 *  com_tty_databits_generic_read
 ************************************************************************/
static UINT32
com_tty_databits_generic_read(
    void *param,
    void *data )
{
    *(UINT8 *)param = databits[*(UINT8 *)data];
    return OK;
}


/************************************************************************
 *  com_tty_databits_generic_write
 ************************************************************************/
static UINT32
com_tty_databits_generic_write(
    void *param,
    void *data )
{
    databits[*(UINT8 *)data] = *(UINT8 *)param;
    return OK;
}


/************************************************************************
 *  com_tty_parity_generic_read
 ************************************************************************/
static UINT32
com_tty_parity_generic_read(
    void *param,
    void *data )
{
    *(UINT8 *)param = parity[*(UINT8 *)data];
    return OK;
}


/************************************************************************
 *  com_tty_parity_generic_write
 ************************************************************************/
static UINT32
com_tty_parity_generic_write(
    void *param,
    void *data )
{
    parity[*(UINT8 *)data] = *(UINT8 *)param;
    return OK;
}


/************************************************************************
 *  com_tty_stopbits_generic_read
 ************************************************************************/
static UINT32
com_tty_stopbits_generic_read(
    void *param,
    void *data )
{
    *(UINT8 *)param = stopbits[*(UINT8 *)data];
    return OK;
}


/************************************************************************
 *  com_tty_stopbits_generic_write
 ************************************************************************/
static UINT32
com_tty_stopbits_generic_write(
    void *param,
    void *data )
{
    stopbits[*(UINT8 *)data] = *(UINT8 *)param;
    return OK;
}


/************************************************************************
 *  com_tty_flowctrl_generic_read
 ************************************************************************/
static UINT32
com_tty_flowctrl_generic_read(
    void *param,
    void *data )
{
    *(UINT8 *)param = flowctrl[*(UINT8 *)data];
    return OK;
}


/************************************************************************
 *  com_tty_flowctrl_generic_write
 ************************************************************************/
static UINT32
com_tty_flowctrl_generic_write(
    void *param,
    void *data )
{
    flowctrl[*(UINT8 *)data] = *(UINT8 *)param;
    return OK;
}



/************************************************************************
 *  Implementation : Public functions
 ************************************************************************/


/************************************************************************
 *
 *                          syscon_generic_tty_init
 *  Description :
 *  -------------
 *
 *  Initialize generic TTY parts of SYSCON module.
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
syscon_generic_tty_init( void )
{
    syscon_register_generic( SYSCON_COM_TTY0_BAUDRATE_ID,
			     com_tty_baudrate_generic_read,
			     (void *)&tty0,
			     com_tty_baudrate_generic_write,
			     (void *)&tty0 );

    syscon_register_generic( SYSCON_COM_TTY0_DATABITS_ID,
			     com_tty_databits_generic_read,
			     (void *)&tty0,
			     com_tty_databits_generic_write,
			     (void *)&tty0 );

    syscon_register_generic( SYSCON_COM_TTY0_PARITY_ID,
			     com_tty_parity_generic_read,
			     (void *)&tty0,
			     com_tty_parity_generic_write,
			     (void *)&tty0 );

    syscon_register_generic( SYSCON_COM_TTY0_STOPBITS_ID,
			     com_tty_stopbits_generic_read,
			     (void *)&tty0,
			     com_tty_stopbits_generic_write,
			     (void *)&tty0 );

    syscon_register_generic( SYSCON_COM_TTY0_FLOWCTRL_ID,
			     com_tty_flowctrl_generic_read,
			     (void *)&tty0,
			     com_tty_flowctrl_generic_write,
			     (void *)&tty0 );

    syscon_register_generic( SYSCON_COM_TTY1_BAUDRATE_ID,
			     com_tty_baudrate_generic_read,
			     (void *)&tty1,
			     com_tty_baudrate_generic_write,
			     (void *)&tty1 );

    syscon_register_generic( SYSCON_COM_TTY1_DATABITS_ID,
			     com_tty_databits_generic_read,
			     (void *)&tty1,
			     com_tty_databits_generic_write,
			     (void *)&tty1 );

    syscon_register_generic( SYSCON_COM_TTY1_PARITY_ID,
			     com_tty_parity_generic_read,
			     (void *)&tty1,
			     com_tty_parity_generic_write,
			     (void *)&tty1 );

    syscon_register_generic( SYSCON_COM_TTY1_STOPBITS_ID,
			     com_tty_stopbits_generic_read,
			     (void *)&tty1,
			     com_tty_stopbits_generic_write,
			     (void *)&tty1 );

    syscon_register_generic( SYSCON_COM_TTY1_FLOWCTRL_ID,
			     com_tty_flowctrl_generic_read,
			     (void *)&tty1,
			     com_tty_flowctrl_generic_write,
			     (void *)&tty1 );
}