at91_uart_ioctl.c

at91rm9200 linux 下t6963的驱动

/*
 * can_ioctl - can4linux CAN driver module
 *
 * can4linux -- LINUX CAN device driver source
 * 
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 * 
 * Copyright (c) 2001 port GmbH Halle/Saale
 * (c) 2001 Heinz-J黵gen Oertel ([e-mail])
 *          Claus Schroeter ([e-mail])
 *------------------------------------------------------------------
 * $Header: /z2/cvsroot/products/0530/software/can4linux/src/can_ioctl.c,v 1.13 2005/08/29 08:49:52 oe Exp $
 *
 *--------------------------------------------------------------------------
 *
 *
 * modification history
 * --------------------
 * $Log: can_ioctl.c,v $
 * Revision 1.13  2005/08/29 08:49:52  oe
 * - added support for ListenOnlyMode
 * - added support for frame self reception mode
 *
 *
 *
 *
 *--------------------------------------------------------------------------
 */


/**
* \file can_ioctl.c
* \author Heinz-J黵gen Oertel, port GmbH
* $Revision: 1.13 $
* $Date: 2005/08/29 08:49:52 $
*
*
*/

#include "at91_uart_defs.h"



int at91_uart_ioctl( __LDDK_IOCTL_PARAM )
{
void *argp;
void *data,*addr;
int retval = -EIO;
int i,j;


	struct at91_uart_port *port;
	port=file->private_data;
  
 
  switch(cmd){

        case CMD_INIT:

	if( !access_ok(VERIFY_READ, (void *)arg, sizeof(Command_par))) {
		return(retval); 
	  }
	  if( !access_ok(VERIFY_WRITE, (void *)arg, sizeof(Command_par))) {
	     return(retval); 
	  }
	Lcdinit();
	
	  break;

      case CMD_UPDATA:

	  if( !access_ok(VERIFY_READ, (void *)arg, sizeof(Command_par))) {
	     return(retval); 
	  }
	  if( !access_ok(VERIFY_WRITE, (void *)arg, sizeof(Command_par))) {
	     return(retval); 
	  }
	  argp = (void *) kmalloc( sizeof(Command_par) +1 , GFP_KERNEL );
	  __lddk_copy_from_user( (void *)argp, (Command_par *)arg,
	  					sizeof(Command_par));
		data = (void *) kmalloc(  ((Command_par *) argp)->lenth , GFP_KERNEL );

	  __lddk_copy_from_user( (void *)data, (void *)( ((Command_par *) argp)->addr ),
	  					((Command_par *) argp)->lenth );
	  					
	//更新显示区域	  					
	  					
    for(i=0; i<((Command_par *) argp)->h; i++)			// 输出h行数据
    {  // 计算出更新区域的buffer地址
       addr = data + ( ((Command_par *) argp)->y + ( ((Command_par *) argp)->x )>>3 );
       
       // 输出一行(w)数据    
       Lcd_Two_Para_WR( (((Command_par *) argp)->x >> 3 ) , ((Command_par *) argp)->y, INS_SET_ADR_PTR );
       
	Lcd_Non_Para_WR( INS_DAT_AUT_WR );
	Lcd_RW_Busy();
	Lcd_Aut_RW_Busy();       
       
       for(j=0; j<w; j++)
       { 
       		T6963C_PUT_DATA(port,*addr);
		Lcd_Aut_RW_Busy();
          	addr++;
       }
       
       // 指向下一行
       y++;
    }	  					
	  kfree(argp);
	  kfree(data);

	  break;
 
      default:
	return -EINVAL;
    }
    return 1;
}