at91_uart_core.c

at91rm9200 linux 下t6963的驱动

/*
 * can_core - can4linux CAN driver module
set tagprg="global -t $1"
 *
 *
 * can4linux -- LINUX CAN device driver source
 * 
 * Copyright (c) 2001 port GmbH Halle/Saale
 * (c) 2001 Heinz-J黵gen Oertel ([e-mail])
 *          Claus Schroeter ([e-mail])
 * derived from the the LDDK can4linux version
 *     (c) 1996,1997 Claus Schroeter ([e-mail])
 *------------------------------------------------------------------
 * $Header: /z2/cvsroot/products/0530/software/can4linux/src/can_core.c,v 1.19 2005/08/29 08:55:43 oe Exp $
 *
 *--------------------------------------------------------------------------
 *
 *
 * modification history
 * --------------------
 * $Log: can_core.c,v $
 * Revision 1.19  2005/08/29 08:55:43  oe
 * - adopted to be compiled for K2.6 and 2.4
 *
 * Revision 1.18  2005/07/22 12:01:46  oe
 * applied patch by Steven Scholz
 * - new ioctl( , CONF_LISTEN_ONLY_MODE, )
 * - replaced verify_area() by !access_ok()
 *
 * Revision 1.17  2005/04/01 16:04:37  oe
 * - documentation changes
 * - move regbase to the hardware files
 *
 * Revision 1.16  2005/02/09 16:16:08  oe
 * - changed doc a bit
 *
 * Revision 1.15  2005/02/07 11:40:33  oe
 * - added comment
 *
 * Revision 1.14  2004/12/14 09:36:35  oe
 * - Release for kernel 2.6 with support for 82527 included
 *
 * Revision 1.13  2004/05/14 10:02:54  oe
 * - started supporting CPC-Card
 * - version number in can4linux.h available
 * - only one structure type for Config_par_t Command_par_t
 * - new ioctl command CMD_CLEARBUFFERS
 *
 * Revision 1.12  2004/02/13 14:19:50  oe
 * *** empty log message ***
 *
 * Revision 1.11  2003/12/29 15:18:22  oe
 * - register driver in dev-filesystems
 * - support for indexed-i/o
 *
 * Revision 1.10  2003/08/27 13:06:26  oe
 * - Version 3.0
 *
 * Revision 1.9  2003/07/05 14:28:55  oe
 * - all changes for the new 3.0: try to eliminate hw depedencies at run-time.
 *   configure for HW at compile time
 *
 * Revision 1.8  2002/10/25 10:39:25  oe
 * - vendor specific handling for Advantech board added by "R.R.Robotica" <[e-mail]>
 *
 * Revision 1.7  2002/10/11 16:58:06  oe
 * - IOModel, Outc, VendOpt are now set at compile time
 * - deleted one misleading printk()
 *
 * Revision 1.6  2002/08/08 17:59:38  oe
 * *** empty log message ***
 *
 * Revision 1.5  2001/11/20 16:43:29  oe
 * *** empty log message ***
 *
 * Revision 1.4  2001/09/14 14:58:09  oe
 * first free release
 *
 * Revision 1.3  2001/09/04 15:51:44  oe
 * changed struct file_operations can_fops
 *
 * Revision 1.2  2001/06/15 15:32:10  oe
 * - added PCI support EMS CPC-PCI
 *
 * Revision 1.1.1.1  2001/06/11 18:30:54  oe
 * minimal version can4linux embedded, compile time Konfigurierbar
 *
 *
 *
 *
 *--------------------------------------------------------------------------
 */


#include <linux/init.h>
#include <linux/fs.h>			/* register_chrdev() */
#include "at91_uart_defs.h"
#include <linux/device.h>



MODULE_AUTHOR("H.-J.Oertel <[e-mail]>");
MODULE_DESCRIPTION("CAN fieldbus driver");
MODULE_LICENSE("GPL");


int Can_major 				    = CAN_MAJOR; 


static struct file_operations at91_uart_fops = { 
    .owner	=	THIS_MODULE,
    .open	=	at91_uart_open,
    .release	=	at91_uart_close,
    .read	=	at91_uart_read,
    .write	=	at91_uart_write,
    .ioctl	=	at91_uart_ioctl,
};

static int __init at91_uart_init(void)
{
	int i;

   if( (i = register_chrdev(Can_major, "t6963c", &at91_uart_fops)) ) {
	printk("-> can't get Major %d = %d\n", Can_major, i);
	return(-EIO);
    }

#ifdef CONFIG_DEVFS_FS
    /* If we have devfs, create /dev/canX to put files in there */
	 devfs_mk_dir("t6963c");
    for (i=0; i < MAX_CHANNELS; i++) {
		devfs_mk_cdev(MKDEV(Can_major, i),
			S_IFCHR | S_IRUGO | S_IWUGO, "t6963c/%d", i);

    }

#endif
    printk(" H.J. Oertel ([e-mail])\n");
    printk(" C.Schroeter ([e-mail]), H.D. Stich\n"); 
	    


    return 0;
}

static void at91_uart_exit(void)
{
#ifdef CONFIG_DEVFS_FS
int i;
#endif
    
	

#ifdef CONFIG_DEVFS_FS
    for (i=0; i < MAX_CHANNELS; i++) {
	devfs_remove("t6963c/%d", i);
}
	devfs_remove("t6963c");

#endif
	unregister_chrdev(Can_major, "t6963c");

}


module_init(at91_uart_init);
module_exit(at91_uart_exit);