/*
* Start closing connection.
*/
static int NutPppClose(NUTFILE * fp)
{
PPPDCB *dcb = fp->nf_dev->dev_dcb;
IpcpClose(fp->nf_dev);
_close(dcb->dcb_fd);
if (dcb->dcb_user)
NutHeapFree(dcb->dcb_user);
if (dcb->dcb_pass)
NutHeapFree(dcb->dcb_pass);
NutHeapFree(fp);
return 0;
}
/*!
* \brief Unmount a previously mounted partition.
*
* Applications should not directly call this function, but use the high
* level stdio routines for closing a previously opened file.
*
* \return 0 on success, -1 otherwise.
*/
static int At91MciUnmount(NUTFILE * nfp)
{
int rc = -1;
if (nfp) {
MCIFCB *fcb = (MCIFCB *) nfp->nf_fcb;
if (fcb) {
rc = fcb->fcb_fsdev->dev_ioctl(fcb->fcb_fsdev, FS_VOL_UNMOUNT, NULL);
NutHeapFree(fcb);
}
NutHeapFree(nfp);
}
return rc;
}
/*!
* \brief Initialize the RTC in LPC 17xx controller
*
* \return 0 on success or -1 in case of an error.
*
*/
static int Lpc17xxRtcInit(NUTRTC *rtc)
{
rtc->dcb = NutHeapAllocClear(sizeof(lpc17xx_rtc_dcb));
if (rtc->dcb == NULL) {
return -1;
}
if (NutRegisterIrqHandler(&sig_RTC, Lpc17xxRtcInterrupt, rtc) != 0) {
NutHeapFree(rtc->dcb);
return -1;
}
/* Set up clock and power for RTC module */
SysCtlPeripheralClkEnable(CLKPWR_PCONP_PCRTC);
/* Clear all register to be default */
LPC_RTC->ILR = 0x03;
LPC_RTC->CCR = 0x00;
LPC_RTC->CIIR = 0x00;
LPC_RTC->AMR = 0xFF;
LPC_RTC->CALIBRATION = 0x00;
/* enable RTC (run) */
LPC_RTC->CCR |= RTC_CCR_CLKEN;
((lpc17xx_rtc_dcb *)rtc->dcb)->flags = 0x00000000;
rtc->alarm = NULL;
NutIrqEnable(&sig_RTC);
return(0);
}
int NutDestroyTwiBus( NUTTWIBUS *bus)
{
if (bus->bus_icb) {
NutHeapFree( bus->bus_icb);
}
return 0;
}
/*!
* \brief Release a network buffer structure.
*
* Returns all memory previously allocated by a
* network buffer to the available heap space.
*
* \param nb Points to an existing network buffer
* structure, previously allocated by
* NutNetBufAlloc().
*
* \return 0 if successfull or -1 if the structure
* contains previously released memory space.
*/
int NutNetBufFree(NETBUF * nb)
{
if(nb) {
NutNetBufAlloc(nb, nb->nb_flags, 0);
if (NutHeapFree(nb)) {
return -1;
}
}
return 0;
}
/*!
* \brief Process elapsed timers.
*
* This routine is called during context switch processing.
* Applications should not use this function.
*/
void NutTimerProcessElapsed(void)
{
NUTTIMERINFO *tn;
uint32_t ticks;
uint32_t ticks_new;
// calculate ticks since last call
ticks = NutGetTickCount();
ticks_new = ticks - nut_ticks_resume;
nut_ticks_resume = ticks;
// process timers
while (nutTimerList && ticks_new){
tn = nutTimerList;
// subtract time
if (ticks_new < tn->tn_ticks_left) {
tn->tn_ticks_left -= ticks_new;
ticks_new = 0;
} else {
ticks_new -= tn->tn_ticks_left;
tn->tn_ticks_left = 0;
}
// elapsed
if (tn->tn_ticks_left == 0){
// callback
if (tn->tn_callback) {
(*tn->tn_callback) (tn, (void *) tn->tn_arg);
}
// remove from list
nutTimerList = nutTimerList->tn_next;
if (nutTimerList) {
nutTimerList->tn_prev = NULL;
}
if ((tn->tn_ticks_left = tn->tn_ticks) == 0) {
#ifdef NUTDEBUG
if (__os_trf)
fprintf(__os_trs, " TIM %p free NutTimerProcessElapsed\n", tn);
#endif
NutHeapFree(tn);
}
else {
// re-insert
#ifdef NUTDEBUG
if (__os_trf)
fprintf(__os_trs, " TIM %p reinsert NutTimerProcessElapsed\n", tn);
#endif
NutTimerInsert(tn);
}
}
}
}
/*!
* \brief Write argument list to a stream using a given format.
*
* Similar to vfprintf() except that the format string is located in
* program memory.
*
* \param stream Pointer to a previously opened stream.
* \param fmt Format string in program space containing conversion
* specifications.
* \param ap List of arguments.
*
* \return The number of characters written or a negative value to
* indicate an error.
*/
int vfprintf_P(FILE * stream, PGM_P fmt, va_list ap)
{
int rc;
char *rp;
size_t rl;
rl = strlen_P(fmt) + 1;
if ((rp = NutHeapAlloc(rl)) == 0)
return -1;
memcpy_P(rp, fmt, rl);
rc = _putf(_write, stream->iob_fd, rp, ap);
NutHeapFree(rp);
return rc;
}
/*!
* \brief Initialize the segmented buffer.
*
* \param size Number of bytes to allocate for the global buffer.
* In systems with banked memory this parameter is
* ignored and all banked memory is occupied for the
* global buffer. In systems without banked memory,
* the specified number of bytes is taken from heap
* memory.
*
* \return Pointer to the first buffer segment or null on failures.
*/
char *NutSegBufInit(size_t size)
{
#if NUTBANK_COUNT
segbuf_start = (char *)(NUTBANK_START);
segbuf_end = (char *)(NUTBANK_START) + NUTBANK_SIZE;
segbuf_total = (uint32_t) NUTBANK_COUNT *(uint32_t) NUTBANK_SIZE;
#else
if (size == 0)
size = NutHeapAvailable() / 2;
if (segbuf_start) {
NutHeapFree(segbuf_start);
}
if ((segbuf_start = NutHeapAlloc(size)) != NULL)
segbuf_end = segbuf_start + size;
segbuf_total = size;
#endif
return NutSegBufReset();
}
int NutTraceInit(int size, char mode)
{
if (!trace_isinit) {
// start timer1 at CPU frequency/8 and register interrupt service routine
outb(TCCR1B, 2);
NutRegisterIrqHandler(&sig_OVERFLOW1, NutTraceTimer1IRQ, 0);
sbi(TIMSK, TOIE1);
trace_isinit = 1;
}
if (size==0) {
size = TRACE_SIZE_DEFAULT;
}
if (size != trace_size) {
// current buffer is not of size that is wanted
if (trace_items != 0) {
// but memory is already allocated -> free old buffer
NutHeapFree(trace_items);
}
// allocate buffer
trace_items = (t_traceitem *)NutHeapAlloc(size * sizeof(t_traceitem));
if (trace_items == 0) {
// failed
return trace_size = 0;
}
else {
trace_size = size;
}
}
// if (mode == TRACE_MODE_OFF) {
// // if terminal-cmd "trace size <val>" is called trace is started in
// // default mode
// mode = TRACE_MODE_DEFAULT;
// }
trace_mode = mode;
NutTraceClear();
return trace_size;
}
static void NutNetBufFreeData(NBDATA * nbd)
{
NutHeapFree(nbd->vp);
nbd->vp = 0;
nbd->sz = 0;
}
/*!
* \brief Mount a partition.
*
* Nut/OS doesn't provide specific routines for mounting. Instead routines
* for opening files are used.
*
* Applications should not directly call this function, but use the high
* level stdio routines for opening a file.
*
* \param dev Pointer to the MMC device.
* \param name Partition number followed by a slash followed by a name
* of the file system device. Both items are optional. If no
* file system driver name is given, the first file system
* driver found in the list of registered devices will be
* used. If no partition number is specified or if partition
* zero is given, the first active primary partition will be
* used.
* \param mode Opening mode. Currently ignored, but
* \code _O_RDWR | _O_BINARY \endcode should be used for
* compatibility with future enhancements.
* \param acc File attributes, ignored.
*
* \return Pointer to a newly created file pointer to the mounted
* partition or NUTFILE_EOF in case of any error.
*/
static NUTFILE *At91MciMount(NUTDEVICE * dev, CONST char *name, int mode, int acc)
{
int partno = 0;
int i;
NUTDEVICE *fsdev;
NUTFILE *nfp;
MCIFCB *fcb;
DOSPART *part;
MCIFC *ifc = (MCIFC *) dev->dev_icb;
FSCP_VOL_MOUNT mparm;
if (At91MciDiscover(ifc)) {
errno = ENODEV;
return NUTFILE_EOF;
}
/* Parse the name for a partition number and a file system driver. */
if (*name) {
partno = atoi(name);
do {
name++;
} while (*name && *name != '/');
if (*name == '/') {
name++;
}
}
#ifdef NUTDEBUG
printf("['%s'-PART%d]", name, partno);
#endif
/*
* Check the list of registered devices for the given name of the
* files system driver. If none has been specified, get the first
* file system driver in the list. Hopefully the application
* registered one only.
*/
for (fsdev = nutDeviceList; fsdev; fsdev = fsdev->dev_next) {
if (*name == 0) {
if (fsdev->dev_type == IFTYP_FS) {
break;
}
} else if (strcmp(fsdev->dev_name, name) == 0) {
break;
}
}
if (fsdev == 0) {
#ifdef NUTDEBUG
printf("[No FSDriver]");
#endif
errno = ENODEV;
return NUTFILE_EOF;
}
if ((fcb = NutHeapAllocClear(sizeof(MCIFCB))) == 0) {
errno = ENOMEM;
return NUTFILE_EOF;
}
fcb->fcb_fsdev = fsdev;
/* Initialize MMC access mutex semaphore. */
NutEventPost(&mutex);
/* Read MBR. */
if (At91MciReadSingle(ifc, 0, fcb->fcb_blkbuf)) {
NutHeapFree(fcb);
return NUTFILE_EOF;
}
/* Read partition table. */
part = (DOSPART *) & fcb->fcb_blkbuf[DOSPART_SECTORPOS];
for (i = 1; i <= 4; i++) {
if (partno) {
if (i == partno) {
/* Found specified partition number. */
fcb->fcb_part = *part;
break;
}
} else if (part->part_state & 0x80) {
/* Located first active partition. */
fcb->fcb_part = *part;
break;
}
part++;
}
if (fcb->fcb_part.part_type == PTYPE_EMPTY) {
NutHeapFree(fcb);
return NUTFILE_EOF;
}
if ((nfp = NutHeapAlloc(sizeof(NUTFILE))) == 0) {
NutHeapFree(fcb);
errno = ENOMEM;
return NUTFILE_EOF;
}
nfp->nf_next = 0;
nfp->nf_dev = dev;
nfp->nf_fcb = fcb;
/*
* Mount the file system volume.
*/
mparm.fscp_bmnt = nfp;
mparm.fscp_part_type = fcb->fcb_part.part_type;
if (fsdev->dev_ioctl(fsdev, FS_VOL_MOUNT, &mparm)) {
At91MciUnmount(nfp);
return NUTFILE_EOF;
}
return nfp;
}
