/* getc */
void
xyzModem_stream_terminate (bool abort, int (*getc) (void))
{
int c;
if (abort)
{
ZM_DEBUG (zm_dprintf ("!!!! TRANSFER ABORT !!!!\n"));
switch (xyz.mode)
{
case xyzModem_xmodem:
case xyzModem_ymodem:
/* The X/YMODEM Spec seems to suggest that multiple CAN followed by an equal */
/* number of Backspaces is a friendly way to get the other end to abort. */
CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
/* Now consume the rest of what's waiting on the line. */
ZM_DEBUG (zm_dprintf ("Flushing serial line.\n"));
xyzModem_flush ();
xyz.at_eof = true;
break;
#ifdef xyzModem_zmodem
case xyzModem_zmodem:
/* Might support it some day I suppose. */
#endif
break;
}
}
else
{
ZM_DEBUG (zm_dprintf ("Engaging cleanup mode...\n"));
/*
* Consume any trailing crap left in the inbuffer from
* previous received blocks. Since very few files are an exact multiple
* of the transfer block size, there will almost always be some gunk here.
* If we don't eat it now, RedBoot will think the user typed it.
*/
ZM_DEBUG (zm_dprintf ("Trailing gunk:\n"));
while ((c = (*getc) ()) > -1)
;
ZM_DEBUG (zm_dprintf ("\n"));
/*
* Make a small delay to give terminal programs like minicom
* time to get control again after their file transfer program
* exits.
*/
CYGACC_CALL_IF_DELAY_US ((cyg_int32) 250000);
}
}
/* getc */
void xyzModem_stream_terminate(unsigned int abort, int (*getc)(void))
{
int c;
if(abort){
switch(xyz.mode){
case xyzModem_xmodem:
case xyzModem_ymodem:
/* The X/YMODEM Spec seems to suggest that multiple CAN followed by an equal */
/* number of Backspaces is a friendly way to get the other end to abort. */
putc(CAN);
putc(CAN);
putc(CAN);
putc(CAN);
putc(BSP);
putc(BSP);
putc(BSP);
putc(BSP);
/* Now consume the rest of what's waiting on the line. */
xyzModem_flush();
xyz.at_eof = 1;
break;
#ifdef xyzModem_zmodem
case xyzModem_zmodem:
/* Might support it some day I suppose. */
#endif
break;
}
} else {
/*
* Consume any trailing crap left in the inbuffer from
* previous recieved blocks. Since very few files are an exact multiple
* of the transfer block size, there will almost always be some gunk here.
* If we don't eat it now, RedBoot will think the user typed it.
*/
while((c = (*getc)()) > -1);
/*
* Make a small delay to give terminal programs like minicom
* time to get control again after their file transfer program
* exits.
*/
udelay(250000);
}
}
static int
xyzModem_get_hdr (void)
{
char c;
int res;
bool hdr_found = false;
int i, can_total, hdr_chars;
unsigned short cksum;
ZM_DEBUG (zm_new ());
/* Find the start of a header */
can_total = 0;
hdr_chars = 0;
if (xyz.tx_ack)
{
CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
xyz.tx_ack = false;
}
while (!hdr_found)
{
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
ZM_DEBUG (zm_save (c));
if (res)
{
hdr_chars++;
switch (c)
{
case SOH:
xyz.total_SOH++;
case STX:
if (c == STX)
xyz.total_STX++;
hdr_found = true;
break;
case CAN:
xyz.total_CAN++;
ZM_DEBUG (zm_dump (__LINE__));
if (++can_total == xyzModem_CAN_COUNT)
{
return xyzModem_cancel;
}
else
{
/* Wait for multiple CAN to avoid early quits */
break;
}
case EOT:
/* EOT only supported if no noise */
if (hdr_chars == 1)
{
CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
ZM_DEBUG (zm_dprintf ("ACK on EOT #%d\n", __LINE__));
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_eof;
}
default:
/* Ignore, waiting for start of header */
;
}
}
else
{
/* Data stream timed out */
xyzModem_flush (); /* Toss any current input */
ZM_DEBUG (zm_dump (__LINE__));
CYGACC_CALL_IF_DELAY_US ((cyg_int32) 250000);
return xyzModem_timeout;
}
}
/* Header found, now read the data */
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.blk);
ZM_DEBUG (zm_save (xyz.blk));
if (!res)
{
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_timeout;
}
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.cblk);
ZM_DEBUG (zm_save (xyz.cblk));
if (!res)
{
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_timeout;
}
xyz.len = (c == SOH) ? 128 : 1024;
xyz.bufp = xyz.pkt;
for (i = 0; i < xyz.len; i++)
{
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
ZM_DEBUG (zm_save (c));
if (res)
{
xyz.pkt[i] = c;
}
else
{
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_timeout;
}
}
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.crc1);
ZM_DEBUG (zm_save (xyz.crc1));
if (!res)
{
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_timeout;
}
if (xyz.crc_mode)
{
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.crc2);
ZM_DEBUG (zm_save (xyz.crc2));
if (!res)
{
ZM_DEBUG (zm_dump (__LINE__));
return xyzModem_timeout;
}
}
ZM_DEBUG (zm_dump (__LINE__));
/* Validate the message */
if ((xyz.blk ^ xyz.cblk) != (unsigned char) 0xFF)
{
ZM_DEBUG (zm_dprintf
("Framing error - blk: %x/%x/%x\n", xyz.blk, xyz.cblk,
(xyz.blk ^ xyz.cblk)));
ZM_DEBUG (zm_dump_buf (xyz.pkt, xyz.len));
xyzModem_flush ();
return xyzModem_frame;
}
/* Verify checksum/CRC */
if (xyz.crc_mode)
{
cksum = cyg_crc16 (xyz.pkt, xyz.len);
if (cksum != ((xyz.crc1 << 8) | xyz.crc2))
{
ZM_DEBUG (zm_dprintf ("CRC error - recvd: %02x%02x, computed: %x\n",
xyz.crc1, xyz.crc2, cksum & 0xFFFF));
return xyzModem_cksum;
}
}
else
{
cksum = 0;
for (i = 0; i < xyz.len; i++)
{
cksum += xyz.pkt[i];
}
if (xyz.crc1 != (cksum & 0xFF))
{
ZM_DEBUG (zm_dprintf
("Checksum error - recvd: %x, computed: %x\n", xyz.crc1,
cksum & 0xFF));
return xyzModem_cksum;
}
}
/* If we get here, the message passes [structural] muster */
return 0;
}
int
xyzModem_stream_read (char *buf, int size, int *err)
{
int stat, total, len;
int retries;
total = 0;
stat = xyzModem_cancel;
/* Try and get 'size' bytes into the buffer */
while (!xyz.at_eof && (size > 0))
{
if (xyz.len == 0)
{
retries = xyzModem_MAX_RETRIES;
while (retries-- > 0)
{
stat = xyzModem_get_hdr ();
if (stat == 0)
{
if (xyz.blk == xyz.next_blk)
{
xyz.tx_ack = true;
ZM_DEBUG (zm_dprintf
("ACK block %d (%d)\n", xyz.blk, __LINE__));
xyz.next_blk = (xyz.next_blk + 1) & 0xFF;
#if defined(xyzModem_zmodem) || defined(USE_YMODEM_LENGTH)
if (xyz.mode == xyzModem_xmodem || xyz.file_length == 0)
{
#else
if (1)
{
#endif
/* Data blocks can be padded with ^Z (EOF) characters */
/* This code tries to detect and remove them */
if ((xyz.bufp[xyz.len - 1] == EOF) &&
(xyz.bufp[xyz.len - 2] == EOF) &&
(xyz.bufp[xyz.len - 3] == EOF))
{
while (xyz.len
&& (xyz.bufp[xyz.len - 1] == EOF))
{
xyz.len--;
}
}
}
#ifdef USE_YMODEM_LENGTH
/*
* See if accumulated length exceeds that of the file.
* If so, reduce size (i.e., cut out pad bytes)
* Only do this for Y-modem (and Z-modem should it ever
* be supported since it can fall back to Y-modem mode).
*/
if (xyz.mode != xyzModem_xmodem && 0 != xyz.file_length)
{
xyz.read_length += xyz.len;
if (xyz.read_length > xyz.file_length)
{
xyz.len -= (xyz.read_length - xyz.file_length);
}
}
#endif
break;
}
else if (xyz.blk == ((xyz.next_blk - 1) & 0xFF))
{
/* Just re-ACK this so sender will get on with it */
CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
continue; /* Need new header */
}
else
{
stat = xyzModem_sequence;
}
}
if (stat == xyzModem_cancel)
{
break;
}
if (stat == xyzModem_eof)
{
CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
ZM_DEBUG (zm_dprintf ("ACK (%d)\n", __LINE__));
if (xyz.mode == xyzModem_ymodem)
{
CYGACC_COMM_IF_PUTC (*xyz.__chan,
(xyz.crc_mode ? 'C' : NAK));
xyz.total_retries++;
ZM_DEBUG (zm_dprintf ("Reading Final Header\n"));
stat = xyzModem_get_hdr ();
CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
ZM_DEBUG (zm_dprintf ("FINAL ACK (%d)\n", __LINE__));
}
xyz.at_eof = true;
break;
}
CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
xyz.total_retries++;
ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
}
if (stat < 0)
{
*err = stat;
xyz.len = -1;
return total;
}
}
/* Don't "read" data from the EOF protocol package */
if (!xyz.at_eof)
{
len = xyz.len;
if (size < len)
len = size;
memcpy (buf, xyz.bufp, len);
size -= len;
buf += len;
total += len;
xyz.len -= len;
xyz.bufp += len;
}
}
return total;
}
int
xyzModem_stream_write(ulong src,long size)
{
char c;
unsigned char *psrc;
unsigned short cksum;
int ultlen = 0;
int total = 0;
int retry, i, res;
int flag_ok = 0;
int flag_frame = 0;
psrc =(unsigned char *)src;
xyz.blk = 1;
xyz.cblk = ~xyz.blk;
xyz.len = xyzModem_1k;
for (retry = 0; retry < 300; ++retry) {
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
if (res) {
switch (c) {
case 'C':
xyz.crc_mode = true;
flag_ok = 1;
ZM_DEBUG (zm_dprintf ("Receive char CRC***\n"));
break;
case NAK:
xyz.crc_mode = false;
flag_ok = 1;
ZM_DEBUG (zm_dprintf ("Receive char NAK***\n"));
break;
case CAN:
ZM_DEBUG (zm_dprintf ("Receive char cancel***\n"));
CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
if (c == CAN) {
serial_putc_raw(ACK);
xyzModem_flush ();
return -1;
}
break;
default:
ZM_DEBUG (zm_dprintf ("Receive char %x***\n",c));
break;
}
}
if (flag_ok == 1)
break;
}
if (flag_ok == 0) {
serial_putc_raw(CAN);
serial_putc_raw(CAN);
serial_putc_raw(CAN);
xyzModem_flush ();
return -2;
}
while(1) {
flag_frame = 0;
ultlen = size - total;
if (ultlen > xyz.len)
ultlen = xyz.len;
if (ultlen > 0) {
memcpy (xyz.pkt, &psrc[total], ultlen);
if (ultlen < xyz.len) {
memset (&xyz.pkt[ultlen], EOF, xyz.len-ultlen);
}
if (xyz.crc_mode) {
cksum = cyg_crc16(xyz.pkt, xyz.len);
xyz.crc1 = (cksum >> 8) & 0xFF;
xyz.crc2 = cksum & 0xFF;
ZM_DEBUG (zm_dprintf ("add crc check***\n"));
} else {
static int xyzModem_get_hdr(void)
{
char c;
int res;
unsigned int hdr_found = 0;
int i, can_total, hdr_chars;
unsigned short cksum;
/* Find the start of a header */
can_total = 0;
hdr_chars = 0;
if(xyz.tx_ack){
putc(ACK);
xyz.tx_ack = 0;
}
while(!hdr_found){
res = comm_if_getc_tout(&c);
if(res){
hdr_chars++;
switch(c){
case SOH:
xyz.total_SOH++;
case STX:
if(c == STX)
xyz.total_STX++;
hdr_found = 1;
break;
case CAN:
xyz.total_CAN++;
if(++can_total == xyzModem_CAN_COUNT){
return xyzModem_cancel;
} else {
/* Wait for multiple CAN to avoid early quits */
break;
}
case EOT:
/* EOT only supported if no noise */
if(hdr_chars == 1){
putc(ACK);
return xyzModem_eof;
}
default:
/* Ignore, waiting for start of header */
;
}
} else {
/* Data stream timed out */
xyzModem_flush(); /* Toss any current input */
udelay(250000);
return xyzModem_timeout;
}
}
/* Header found, now read the data */
res = comm_if_getc_tout((char *)&xyz.blk);
if(!res){
return xyzModem_timeout;
}
res = comm_if_getc_tout((char *)&xyz.cblk);
if(!res){
return xyzModem_timeout;
}
xyz.len = (c == SOH) ? 128 : 1024;
xyz.bufp = xyz.pkt;
for(i = 0; i < xyz.len; i++){
res = comm_if_getc_tout(&c);
if(res){
xyz.pkt[i] = c;
} else {
return xyzModem_timeout;
}
}
res = comm_if_getc_tout((char *)&xyz.crc1);
if(!res){
return xyzModem_timeout;
}
if(xyz.crc_mode){
res = comm_if_getc_tout((char *)&xyz.crc2);
if(!res){
return xyzModem_timeout;
}
}
/* Validate the message */
if((xyz.blk ^ xyz.cblk) != (unsigned char)0xFF){
xyzModem_flush();
return xyzModem_frame;
}
/* Verify checksum/CRC */
if(xyz.crc_mode){
cksum = cyg_crc16(xyz.pkt, xyz.len);
if(cksum != ((xyz.crc1 << 8) | xyz.crc2)){
return xyzModem_cksum;
}
} else {
cksum = 0;
for(i = 0; i < xyz.len; i++){
cksum += xyz.pkt[i];
}
if(xyz.crc1 != (cksum & 0xFF)){
return xyzModem_cksum;
}
}
/* If we get here, the message passes [structural] muster */
return 0;
}
