-/* devcommon.c - common device code
- * Linux CAN-bus device driver.
- * 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
- */
+/**************************************************************************/
+/* File: devcommon.c - common device code */
+/* */
+/* LinCAN - (Not only) Linux CAN bus driver */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz> */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz> */
+/* Funded by OCERA and FRESCOR IST projects */
+/* */
+/* LinCAN is free software; you can redistribute it and/or modify it */
+/* under terms of the GNU General Public License as published by the */
+/* Free Software Foundation; either version 2, or (at your option) any */
+/* later version. LinCAN 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 */
+/* General Public License for more details. You should have received a */
+/* copy of the GNU General Public License along with LinCAN; see file */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
+/* Cambridge, MA 02139, USA. */
+/* */
+/* To allow use of LinCAN in the compact embedded systems firmware */
+/* and RT-executives (RTEMS for example), main authors agree with next */
+/* special exception: */
+/* */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce */
+/* an application image/executable, does not by itself cause the */
+/* resulting application image/executable to be covered by */
+/* the GNU General Public License. */
+/* This exception does not however invalidate any other reasons */
+/* why the executable file might be covered by the GNU Public License. */
+/* Publication of enhanced or derived LinCAN files is required although. */
+/**************************************************************************/
#include "../include/can.h"
#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/devcommon.h"
+#ifdef CAN_WITH_RTL
+static inline
+void canqueue_wake_chip_worker(struct canque_ends_t *qends, struct canchip_t *chip, struct msgobj_t *obj)
+{
+ if(qends->endinfo.chipinfo.worker_thread){
+ can_msgobj_set_fl(obj,WORKER_WAKE);
+ pthread_kill(qends->endinfo.chipinfo.worker_thread,RTL_SIGNAL_WAKEUP);
+ rtl_schedule();
+ } else {
+ set_bit(MSGOBJ_TX_REQUEST_b,&chip->pend_flags);
+ if(chip->worker_thread) {
+ set_bit(MSGOBJ_WORKER_WAKE_b,&chip->pend_flags);
+ pthread_kill(chip->worker_thread,RTL_SIGNAL_WAKEUP);
+ rtl_schedule();
+ }
+ }
+}
+
+#endif /*CAN_WITH_RTL*/
+
+
+/**
+ * canqueue_notify_chip - notification callback handler for CAN chips ends of queues
+ * @qends: pointer to the callback side ends structure
+ * @qedge: edge which invoked notification
+ * @what: notification type
+ *
+ * This function has to deal with more possible cases. It can be called from
+ * the kernel or interrupt context for Linux only compilation of driver.
+ * The function can be called from kernel context or RT-Linux thread context
+ * for mixed mode Linux/RT-Linux compilation.
+ */
void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qedge, int what)
{
- struct chip_t *chip=qends->endinfo.chipinfo.chip;
+ struct canchip_t *chip=qends->endinfo.chipinfo.chip;
struct msgobj_t *obj=qends->endinfo.chipinfo.msgobj;
DEBUGMSG("canqueue_notify_chip for edge %d and event %d\n",qedge->edge_num,what);
wake_up(&qends->endinfo.chipinfo.daemonq);
break;*/
case CANQUEUE_NOTIFY_PROC:
+ #ifndef CAN_WITH_RTL
/*wake_up(&qends->endinfo.chipinfo.daemonq);*/
- chip->chipspecops->wakeup_tx(chip, obj);
+ if(canque_fifo_test_fl(&qedge->fifo, READY)){
+ if ((chip) && (chip->flags & CHIP_ATTACHED))
+ chip->chipspecops->wakeup_tx(chip, obj);
+ }
+ #else /*CAN_WITH_RTL*/
+ can_msgobj_set_fl(obj,TX_REQUEST);
+ canqueue_wake_chip_worker(qends, chip, obj);
+ #endif /*CAN_WITH_RTL*/
break;
case CANQUEUE_NOTIFY_DEAD_WANTED:
case CANQUEUE_NOTIFY_DEAD:
canque_edge_decref(qedge);
break;
case CANQUEUE_NOTIFY_ATTACH:
+ break;
+ case CANQUEUE_NOTIFY_FILTCH:
+ if(!chip->chipspecops->filtch_rq)
+ break;
+ #ifndef CAN_WITH_RTL
+ chip->chipspecops->filtch_rq(chip, obj);
+ #else /*CAN_WITH_RTL*/
+ can_msgobj_set_fl(obj,FILTCH_REQUEST);
+ canqueue_wake_chip_worker(qends, chip, obj);
+ #endif /*CAN_WITH_RTL*/
+
break;
}
}
-int canqueue_ends_init_chip(struct canque_ends_t *qends, struct chip_t *chip, struct msgobj_t *obj)
+/**
+ * canqueue_ends_init_chip - CAN chip specific ends initialization
+ * @qends: pointer to the ends structure
+ * @chip: pointer to the corresponding CAN chip structure
+ * @obj: pointer to the corresponding message object structure
+ */
+int canqueue_ends_init_chip(struct canque_ends_t *qends, struct canchip_t *chip, struct msgobj_t *obj)
{
int ret;
ret=canqueue_ends_init_gen(qends);
if(ret<0) return ret;
-
+
qends->context=NULL;
+ #ifndef CAN_WITH_RTL
init_waitqueue_head(&qends->endinfo.chipinfo.daemonq);
+ #endif /*CAN_WITH_RTL*/
qends->endinfo.chipinfo.chip=chip;
qends->endinfo.chipinfo.msgobj=obj;
qends->notify=canqueue_notify_chip;
}
+/**
+ * canqueue_ends_done_chip - finalizing of the ends structure for CAN chips
+ * @qends: pointer to ends structure
+ *
+ * Return Value: Function should be designed such way to not fail.
+ */
int canqueue_ends_done_chip(struct canque_ends_t *qends)
{
- return 0;
+ int delayed;
+
+ /* Finish or kill all outgoing edges listed in inends */
+ delayed=canqueue_ends_kill_inlist(qends, 1);
+ /* Kill all incoming edges listed in outends */
+ delayed|=canqueue_ends_kill_outlist(qends);
+
+ return delayed;
}
projects / lincan.git / blobdiff