Removed some dead generated C code in gen_cfile.py, about callbacks.
/*
This file is part of CanFestival, a library implementing CanOpen Stack.
Copyright (C): Edouard TISSERANT and Francis DUPIN
See COPYING file for copyrights details.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
Virtual CAN driver.
Modification of drivers/can_virtual/can_virtual.c:
Rewritten from user-space library to kernel-space module with exported symbols
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/kfifo.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/string.h>
#define NEED_PRINT_MESSAGE
#include "can_driver.h"
#include "def.h"
MODULE_LICENSE("GPL");
#define MAX_NB_CAN_PIPES 16
typedef struct {
char used;
struct kfifo *pipe;
spinlock_t lock;
wait_queue_head_t w_queue;
} CANPipe;
CANPipe canpipes[MAX_NB_CAN_PIPES] = {{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},};
/*********functions which permit to communicate with the board****************/
UNS8 canReceive_driver(CAN_HANDLE fd0, Message *m)
{
long ret = wait_event_interruptible (((CANPipe*)fd0)->w_queue,
kfifo_len (((CANPipe*)fd0)->pipe) >= sizeof(Message));
// interrupted by signal
if (ret == -ERESTARTSYS)
return 2;
if (kfifo_get (((CANPipe*)fd0)->pipe, (unsigned char *)m, sizeof(Message)) != sizeof(Message))
{
printk(KERN_NOTICE "can_virtual: error receiving data from kernel fifo.\n");
return 1;
}
return 0;
}
UNS8 canSend_driver(CAN_HANDLE fd0, Message *m)
{
int i;
printk(KERN_INFO "%x->[ ", (CANPipe*)fd0 - &canpipes[0]);
for(i=0; i < MAX_NB_CAN_PIPES; i++)
{
if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0)
{
printk("%x ",i);
}
}
printk(" ]");
print_message(m);
// send to all readers, except myself
for(i=0; i < MAX_NB_CAN_PIPES; i++)
{
if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0)
{
unsigned int len;
len = kfifo_put (canpipes[i].pipe, (unsigned char *)m, sizeof(Message));
if (len != sizeof(Message)) {
printk(KERN_NOTICE "can_virtual: error sending data to kernel fifo.\n");
return 1;
}
// wake up canReceive_driver()
wake_up_interruptible (&canpipes[i].w_queue);
}
}
return 0;
}
int TranslateBaudRate(char* optarg){
if(!strcmp( optarg, "1M")) return (int)1000;
if(!strcmp( optarg, "500K")) return (int)500;
if(!strcmp( optarg, "250K")) return (int)250;
if(!strcmp( optarg, "125K")) return (int)125;
if(!strcmp( optarg, "100K")) return (int)100;
if(!strcmp( optarg, "50K")) return (int)50;
if(!strcmp( optarg, "20K")) return (int)20;
if(!strcmp( optarg, "10K")) return (int)10;
if(!strcmp( optarg, "5K")) return (int)5;
if(!strcmp( optarg, "none")) return 0;
return 0x0000;
}
UNS8 canChangeBaudRate_driver( CAN_HANDLE fd0, char* baud)
{
printk("%x-> changing to baud rate %s[%d]\n", (CANPipe*)fd0 - &canpipes[0],baud,TranslateBaudRate(baud));
return 0;
}
CAN_HANDLE canOpen_driver(s_BOARD *board)
{
int i;
for(i=0; i < MAX_NB_CAN_PIPES; i++)
{
if(!canpipes[i].used)
break;
}
// initialize CANPipe structure
init_waitqueue_head(&canpipes[i].w_queue);
canpipes[i].lock = SPIN_LOCK_UNLOCKED;
canpipes[i].pipe = kfifo_alloc (10*sizeof(Message), GFP_KERNEL, &canpipes[i].lock);
if (i==MAX_NB_CAN_PIPES || (PTR_ERR(canpipes[i].pipe) == -ENOMEM))
{
printk (KERN_NOTICE "can_virtual: error initializing driver.\n");
return (CAN_HANDLE)NULL;
}
canpipes[i].used = 1;
return (CAN_HANDLE) &canpipes[i];
}
int canClose_driver(CAN_HANDLE fd0)
{
((CANPipe*)fd0)->used = 0;
kfifo_free (((CANPipe*)fd0)->pipe);
return 0;
}
EXPORT_SYMBOL(canOpen_driver);
EXPORT_SYMBOL(canClose_driver);
EXPORT_SYMBOL(canSend_driver);
EXPORT_SYMBOL(canReceive_driver);
EXPORT_SYMBOL(canChangeBaudRate_driver);