* Rewritten for new CAN queues by Pavel Pisa - OCERA team member
* email:pisa@cmp.felk.cvut.cz
* This software is released under the GPL-License.
- * Version lincan-0.2 9 Jul 2003
+ * Version lincan-0.3 17 Jun 2004
*/
-#define __NO_VERSION__
-#include <linux/module.h>
-
-#include <linux/autoconf.h>
-
-#include <linux/fs.h>
-#include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
-#include <linux/malloc.h>
-#else
-#include <linux/slab.h>
-#endif
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/open.h"
-#include "../include/i82527.h"
#include "../include/setup.h"
+#define __NO_VERSION__
+#include <linux/module.h>
+
int can_open(struct inode *inode, struct file *file)
{
struct msgobj_t *obj;
- struct chip_t *chip;
+ struct canchip_t *chip;
struct canuser_t *canuser;
struct canque_ends_t *qends;
+ struct canque_edge_t *edge;
+ can_spin_irqflags_t iflags;
if ( ((obj=objects_p[MINOR_NR]) == NULL) ||
((chip=objects_p[MINOR_NR]->hostchip) == NULL) ) {
atomic_inc(&obj->obj_used);
DEBUGMSG("Device %d opened %d times.\n", MINOR_NR, atomic_read(&obj->obj_used));
- obj->flags |= OBJ_OPENED;
+ can_msgobj_set_fl(obj,OPENED);
if (chip->flags & CHIP_CONFIGURED)
DEBUGMSG("Device is already configured.\n");
if (chip->chipspecops->pre_read_config(chip,obj)<0)
CANMSG("Error initializing chip for receiving\n");
- /* chip->flags |= OBJ_BUFFERS_ALLOCATED; */
-
} /* End of chip configuration */
canuser = (struct canuser_t *)kmalloc(sizeof(struct canuser_t), GFP_KERNEL);
if(canuser == NULL) goto no_canuser;
- canuser->file = file;
+ canuser->flags=0;
+ canuser->userinfo.fileinfo.file = file;
canuser->msgobj = obj;
canuser->magic = CAN_USER_MAGIC;
file->private_data = canuser;
canqueue_ends_init_kern(qends);
canuser->qends = qends;
+ /*required to synchronize with RT-Linux context*/
+ can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
list_add(&canuser->peers, &obj->obj_users);
+ can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
- if(canqueue_connect_edge(canque_new_edge_kern(MAX_BUF_LENGTH),
- canuser->qends, obj->qends)<0) goto no_qedge;
+ if(canqueue_connect_edge(edge=canque_new_edge_kern(MAX_BUF_LENGTH),
+ canuser->qends, obj->qends)<0) goto no_tx_qedge;
if(canqueue_connect_edge(canuser->rx_edge0=canque_new_edge_kern(MAX_BUF_LENGTH),
- obj->qends, canuser->qends)<0) goto no_qedge;
+ obj->qends, canuser->qends)<0) goto no_rx_qedge;
+ /*FIXME: more generic model should be used there*/
+ canque_edge_decref(canuser->rx_edge0);
+ canque_edge_decref(edge);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,50))
MOD_INC_USE_COUNT;
return 0;
- no_qedge:
+ no_rx_qedge:
+ canque_notify_bothends(edge, CANQUEUE_NOTIFY_DEAD_WANTED);
+ canque_edge_decref(edge);
+ no_tx_qedge:
list_del(&canuser->peers);
- canqueue_ends_done_kern(qends, 1);
canuser->qends = NULL;
- kfree(qends);
- obj->qends = NULL;
+ canqueue_ends_dispose_kern(qends, 1);
no_qends:
kfree(canuser);