/**
*
* \brief int close(int fd);
* close a file descriptor
* \param fd The descriptor to close.
*
* \b close closes a file descriptor, so that it no longer
* refers to any device and may be reused.
* \returns
* close returns zero on success, or -1 if an error occurred.
* \par ERRORS
*
* the following errors can occur
*
* \arg \c BADF \b fd isn't a valid open file descriptor
*
*/
__LDDK_CLOSE_TYPE can_close ( __LDDK_CLOSE_PARAM )
{
DBGin("can_close");
{
unsigned int minor = __LDDK_MINOR;
CAN_StopChip(minor);
/* since Vx.y (2.4?) macros defined in ioport.h,
called is __release_region() */
#if defined(CAN_PORT_IO)
release_region(Base[minor], can_range[minor] );
#else
release_region(Base[minor], can_range[minor] );
#endif
#ifdef CAN_USE_FILTER
Can_FilterCleanup(minor);
#endif
Can_FreeIrq(minor, IRQ[minor]);
#if !defined(CONFIG_PPC)
/* printk("CAN module %d has been closed\n",minor); */
#endif
if(Can_isopen[minor] > 0) {
--Can_isopen[minor]; /* flag device as free */
MOD_DEC_USE_COUNT;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,2,0)
return 0;
#endif
}
}
DBGout();
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,2,0)
return -EBADF;
#endif
}
/**
*
* \brief int close(int fd);
* close a file descriptor
* \param fd The descriptor to close.
*
* \b close closes a file descriptor, so that it no longer
* refers to any device and may be reused.
* \returns
* close returns zero on success, or -1 if an error occurred.
* \par ERRORS
*
* the following errors can occur
*
* \arg \c BADF \b fd isn't a valid open file descriptor
*
*/
__LDDK_CLOSE_TYPE can_close ( __LDDK_CLOSE_PARAM )
{
unsigned int minor = iminor(inode);
DBGin("can_close");
CAN_StopChip(minor);
#if !defined(PCM3680) && !defined(CPC_104) && !defined(CPC_PCM_104)
/* call this before freeing any memory or io area.
* this can contain registers needed by Can_FreeIrq()
*/
Can_FreeIrq(minor, IRQ[minor]);
/* should the resources be released in a manufacturer specific file?
* is it always depending on the hardware?
*/
/* since Vx.y (2.4?) macros defined in ioport.h,
called is __release_region() */
#if defined(CAN_PORT_IO) && !defined(KVASER_PCICAN)
release_region(Base[minor], can_range[minor]);
#else
# if defined(CAN_INDEXED_PORT_IO)
release_region(Base[minor], 2);
# else
# ifndef CAN4LINUX_PCI
/* release I/O memory mapping -> release virtual memory */
/* printk("iounmap %p \n", can_base[minor]); */
iounmap(can_base[minor]);
/* Release the memory region */
/* printk("release mem %x \n", Base[minor]); */
release_mem_region(Base[minor], can_range[minor]);
# endif
# endif
#endif
#else /* !defined(TARGETS with CAN_Release() in target.c */
CAN_Release(minor);
#endif /* !defined(TARGETS with CAN_Release() in target.c */
#ifdef CAN_USE_FILTER
Can_FilterCleanup(minor);
#endif
/* printk("CAN module %d has been closed\n",minor); */
if(Can_isopen[minor] > 0) {
--Can_isopen[minor]; /* flag device as free */
/* MOD_DEC_USE_COUNT; */
DBGout();
return 0;
}
DBGout();
return -EBADF;
}
