canproc.c

uClinux下can接口驱动程序

/*================================================================================
 Module Name:   canproc.c 
 General Description:     
==================================================================================
                        Honeywell Confidential Proprietary             
                  ACS - Security (Asia Pacific) R&D Software Operations             
                  (c) Copyright Honeywell 2006, All Rights Reserved             
 Revision History:          
                   Modification     Tracking    
 Author                 Date        Ver Number     Description of Changes
 ----------------   ------------    ----------   ------------------------- 
 Chen Kang      Date: 2006-3-21   Version: ver 1.0.0  Create
 Chen Kang      Date: 2006-8-21   Version: ver 1.0.0  Add annotates
 
 Portability: Indicate if this module is portable to other compilers or 
 platforms. If not, indicate specific reasons why is it not portable.
 ==================================================================================
                                     INCLUDE FILES                   
 ==================================================================================*/

#include "candrv.h"
#include "config.h"	
#include "IncludeCan.h"	

/* ==================================================================================
                                     LOCAL FUNCTIONS DECLARATIONS                   
 ==================================================================================*/

/* =======================================================
 Function Name:***** can_read_procmem *****
 Description:     ***** can_read_procmem entry func *****
 Created By:     ***** Chen Kang *****
 Created Date:  ***** 2006-3-21 *****
 Calls:             ***** NONE *****
 Called By:       ***** NONE *****
 normal para:    *****  off_t offset;int count; *****
 pointer para:   ***** char *buf; char **start;int *eof; void *dat; *****
 Return type:  ***** int *****
 Others:         ***** NONE *****
 ==========================================================*/
int can_read_procmem(char *buf, char **start, off_t offset,
                   int count, int *eof, void *data)
{
  static char achBuffer[512];
  int i,len=0;
  
  if (offset > 0)
    return 0;

  //len + = sprintf (achBuffer, "can drv  test first.\n");
  for(i=0; i < CAN_MAX_NUM; i++)
  {

        len += sprintf(achBuffer+len,"CAN[%d]:ISR called hw:%d,sw:%d\n",
                       i, hw_irq_stat[i],sw_irq_stat[i]);
        len += sprintf(achBuffer+len,"Ponter: R %d,W %d, FullFlag=%d,EmptyFlag=%d\n",
                          CANRcvCyBufApp[i].ReadPoint,
                          CANRcvCyBufApp[i].WritePoint,
                          CANRcvCyBufApp[i].FullFlag,
                          CANRcvCyBufApp[i].EmptyFlag);
       if (len > 256)
	    break;      
    }
      
  *start = achBuffer;
  return len;
}


/*
 * The proc filesystem: function to read and entry
 */

/* =======================================================
 Function Name:***** scullc_proc_offset *****
 Description:     ***** scullc_proc_offset entry func *****
 Created By:     ***** Chen Kang *****
 Created Date:  ***** 2006-3-21 *****
 Calls:             ***** NONE *****
 Called By:       ***** NONE *****
 normal para:    ***** NONE *****
 pointer para:   ***** char *buf; char **start; off_t *offset; int *len; *****
 Return type:  ***** void *****
 Others:         ***** NONE *****
 ==========================================================*/
void scullc_proc_offset(char *buf, char **start, off_t *offset, int *len)
{
    if (*offset == 0)
        return;
    if (*offset >= *len) {      /* Not there yet */
        *offset -= *len;
        *len = 0;
    }
    else {                      /* We're into the interesting stuff now */
        *start = buf + *offset;
        *offset = 0;
    }
}


/* =======================================================
 Function Name:***** init_proc_module *****
 Description:     ***** init_proc_module entry func *****
 Created By:     ***** Chen Kang *****
 Created Date:  ***** 2006-3-21 *****
 Calls:             ***** NONE *****
 Called By:       ***** NONE *****
 normal para:    ***** void; *****
 pointer para:   ***** NONE *****
 Return type:  ***** void *****
 Others:         ***** NONE *****
 ==========================================================*/
void init_proc_module(void)
{
        create_proc_read_entry("candrv", 0, NULL, can_read_procmem, NULL);
}

/* =======================================================
 Function Name:***** cleanup_proc_module *****
 Description:     ***** cleanup_proc_module entry func *****
 Created By:     ***** Chen Kang *****
 Created Date:  ***** 2006-3-21 *****
 Calls:             ***** NONE *****
 Called By:       ***** NONE *****
 normal para:    ***** void; *****
 pointer para:   ***** NONE *****
 Return type:  ***** void *****
 Others:         ***** NONE *****
 ==========================================================*/
void cleanup_proc_module(void)
{ 
       remove_proc_entry ("candrv",0);
}