lincan/src/devcommon.c

   1 /* devcommon.c - common device code
   2  * Linux CAN-bus device driver.
   3  * New CAN queues by Pavel Pisa - OCERA team member
   4  * email:pisa@cmp.felk.cvut.cz
   5  * This software is released under the GPL-License.
   6  * Version lincan-0.2  9 Jul 2003
   7  */
   8
   9 #define __NO_VERSION__
  10 #include <linux/module.h>
  11 #include <linux/version.h>
  12 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
  13 #include <linux/malloc.h>
  14 #else
  15 #include <linux/slab.h>
  16 #endif
  17 #include <linux/wait.h>
  18 #include "../include/can.h"
  19 #include "../include/can_queue.h"
  20 #include "../include/main.h"
  21 #include "../include/devcommon.h"
  22
  23 void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qedge, int what)
  24 {
  25         struct chip_t *chip=qends->endinfo.chipinfo.chip;
  26         struct msgobj_t *obj=qends->endinfo.chipinfo.msgobj;
  27
  28         DEBUGMSG("canqueue_notify_chip for edge %d and event %d\n",qedge->edge_num,what);
  29         switch(what){
  30                 /*case CANQUEUE_NOTIFY_EMPTY:*/
  31                 /*case CANQUEUE_NOTIFY_SPACE:*/
  32                 /*case CANQUEUE_NOTIFY_NOUSR:
  33                         wake_up_interruptible(&qends->endinfo.chipinfo.daemonq);
  34                         break;*/
  35                 case CANQUEUE_NOTIFY_PROC:
  36                         /*wake_up_interruptible(&qends->endinfo.chipinfo.daemonq);*/
  37                         chip->chipspecops->wakeup_tx(chip, obj);
  38                         break;
  39                 case CANQUEUE_NOTIFY_DEAD:
  40                         if(atomic_read(&qedge->edge_used)>0)
  41                                 atomic_dec(&qedge->edge_used);
  42                         break;
  43                 case CANQUEUE_NOTIFY_ATACH:
  44                         atomic_inc(&qedge->edge_used);
  45                         break;
  46         }
  47 }
  48
  49
  50 int canqueue_ends_init_chip(struct canque_ends_t *qends, struct chip_t *chip, struct msgobj_t *obj)
  51 {
  52         int ret;
  53         ret=canqueue_ends_init_gen(qends);
  54         if(ret<0) return ret;
  55
  56         qends->context=NULL;
  57         init_waitqueue_head(&qends->endinfo.chipinfo.daemonq);
  58         qends->endinfo.chipinfo.chip=chip;
  59         qends->endinfo.chipinfo.msgobj=obj;
  60         qends->notify=canqueue_notify_chip;
  61
  62         DEBUGMSG("canqueue_ends_init_chip\n");
  63         return 0;
  64 }
  65
  66