⭐ 欢迎来到虫虫下载站! | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站

📄 rtc_au1000.c

📁 MIPS下的boottloader yamon 的源代码
💻 C
📖 第 1 页 / 共 2 页
字号:

/************************************************************************
 *
 *      rtc_au1000.c
 *
 *      The 'RTC' module implements a device driver
 *      for MC146818A/DS1685/DS1687 compatible RTCs.
 *
 *      IO services are handled the following way :
 *
 *        1) init  serial device:  configure and initialize RTC driver
 *        2) open  serial device:  not used
 *        3) close serial device:  not used
 *        4) read  serial device:  get RTC
 *        5) write serial device:  set RTC
 *        6) ctrl  serial device:  not used
 *
 *
 * ######################################################################
 *
 * 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 * Unpublished rights reserved under the Copyright Laws of the United States of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 <syserror.h>
#include <sysdev.h>
#include <io_api.h>
#include <syscon_api.h>
#include <rtc_api.h>
#include <pb1000.h>
#include <stdio.h>


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

/* Register access */

#define SETREG(reg, data)		    \
	   REG32(reg) = (data);

#define GETREG(reg)			    \
	   REG32(reg)




/************************************************************************
 *  Macro Definitions
*************************************************************************/


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



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

static UINT16 monthdays[13] =
           {  0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
static UINT16 leapyeardays[13] =
           {  0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 };

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


/************************************************************************
 *
 *                          rtc_au1000_init
 *  Description :
 *  -------------
 *  This service initializes the RTC driver.
 *
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    not used
 *  'p_param',   INOUT, not used
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *
 *
 *
 ************************************************************************/
static INT32
rtc_au1000_init(
    UINT32 major,          /* IN: major device number			*/
    UINT32 minor,          /* IN: minor device number			*/
    void   *p_param );     /* INOUT: device parameter block		*/


/************************************************************************
 *
 *                          rtc_au1000_read
 *  Description :
 *  -------------
 *  This service reads the current value of the Real Time Clock.
 *
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, RTC variable of type, t_RTC_calendar.
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *
 *
 ************************************************************************/
static INT32
rtc_au1000_read(
    UINT32         major,      /* IN: major device number		*/
    UINT32         minor,      /* IN: minor device number		*/
    t_RTC_calendar *p_param ); /* INOUT: current RTC value		*/


/************************************************************************
 *
 *                          rtc_au1000_write
 *  Description :
 *  -------------
 *  This service sets the current value of the Real Time Clock.
 *
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, RTC variable of type, t_RTC_calendar.
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *
 *
 ************************************************************************/
static INT32
rtc_au1000_write(
    UINT32         major,      /* IN: major device number		*/
    UINT32	   minor,      /* IN: minor device number		*/
    t_RTC_calendar *p_param ); /* INOUT: current RTC value		*/


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


/************************************************************************
 *
 *                          rtc_au1000_install
 *  Description :
 *  -------------
 *
 *  Installs the RTC device drivers services in the IO system
 *  at the reserved device slot, found in the 'sys_dev.h' file,
 *  which defines all major device numbers.
 *
 *  Note:
 *  This service is the only public declared interface function; all
 *  provided device driver services are static declared, but this
 *  function installs the function pointers in the io-system to
 *  enable the provided public driver services.
 *
 *  Parameters :
 *  ------------
 *
 *  None
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR':  Illegal major device number
 *  'ERROR_IO_NO_SPACE':       Device slot already allocated
 *
 ************************************************************************/
INT32
RTC_install( void )
{
    /* pre-initialize local variables and install device services       */
    return( IO_install( SYS_MAJOR_RTC,     /* major device number   	*/
         (t_io_service) rtc_au1000_init,          /* 'init'  service       	*/
                        NULL,              /* 'open'  service  N/A	*/
                        NULL,              /* 'close' service  N/A	*/
         (t_io_service) rtc_au1000_read,          /* 'read'  service		*/
         (t_io_service) rtc_au1000_write,         /* 'write' service		*/
                        NULL  ) );         /* 'ctrl'  service  N/A	*/
}



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

/************************************************************************
 *
 *                          rtc_au1000_init
 *  Description :
 *  -------------
 *  This service initializes the RTC driver.
 *
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    not used
 *  'p_param',   INOUT, not used
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -