e153b13c8e
To prevent a warning for clang the loop without a body is made more clear by moving it to a line of its own. This prevents a clang warning. cc: sbabic@denx.de Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
819 lines
18 KiB
C
819 lines
18 KiB
C
/*
|
|
*==========================================================================
|
|
*
|
|
* xyzModem.c
|
|
*
|
|
* RedBoot stream handler for xyzModem protocol
|
|
*
|
|
*==========================================================================
|
|
* SPDX-License-Identifier: eCos-2.0
|
|
*==========================================================================
|
|
*#####DESCRIPTIONBEGIN####
|
|
*
|
|
* Author(s): gthomas
|
|
* Contributors: gthomas, tsmith, Yoshinori Sato
|
|
* Date: 2000-07-14
|
|
* Purpose:
|
|
* Description:
|
|
*
|
|
* This code is part of RedBoot (tm).
|
|
*
|
|
*####DESCRIPTIONEND####
|
|
*
|
|
*==========================================================================
|
|
*/
|
|
#include <common.h>
|
|
#include <xyzModem.h>
|
|
#include <stdarg.h>
|
|
#include <crc.h>
|
|
|
|
/* Assumption - run xyzModem protocol over the console port */
|
|
|
|
/* Values magic to the protocol */
|
|
#define SOH 0x01
|
|
#define STX 0x02
|
|
#define EOT 0x04
|
|
#define ACK 0x06
|
|
#define BSP 0x08
|
|
#define NAK 0x15
|
|
#define CAN 0x18
|
|
#define EOF 0x1A /* ^Z for DOS officionados */
|
|
|
|
#define USE_YMODEM_LENGTH
|
|
|
|
/* Data & state local to the protocol */
|
|
static struct
|
|
{
|
|
#ifdef REDBOOT
|
|
hal_virtual_comm_table_t *__chan;
|
|
#else
|
|
int *__chan;
|
|
#endif
|
|
unsigned char pkt[1024], *bufp;
|
|
unsigned char blk, cblk, crc1, crc2;
|
|
unsigned char next_blk; /* Expected block */
|
|
int len, mode, total_retries;
|
|
int total_SOH, total_STX, total_CAN;
|
|
bool crc_mode, at_eof, tx_ack;
|
|
#ifdef USE_YMODEM_LENGTH
|
|
unsigned long file_length, read_length;
|
|
#endif
|
|
} xyz;
|
|
|
|
#define xyzModem_CHAR_TIMEOUT 2000 /* 2 seconds */
|
|
#define xyzModem_MAX_RETRIES 20
|
|
#define xyzModem_MAX_RETRIES_WITH_CRC 10
|
|
#define xyzModem_CAN_COUNT 3 /* Wait for 3 CAN before quitting */
|
|
|
|
|
|
#ifndef REDBOOT /*SB */
|
|
typedef int cyg_int32;
|
|
static int
|
|
CYGACC_COMM_IF_GETC_TIMEOUT (char chan, char *c)
|
|
{
|
|
#define DELAY 20
|
|
unsigned long counter = 0;
|
|
while (!tstc () && (counter < xyzModem_CHAR_TIMEOUT * 1000 / DELAY))
|
|
{
|
|
udelay (DELAY);
|
|
counter++;
|
|
}
|
|
if (tstc ())
|
|
{
|
|
*c = getc ();
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
CYGACC_COMM_IF_PUTC (char x, char y)
|
|
{
|
|
putc (y);
|
|
}
|
|
|
|
/* Validate a hex character */
|
|
__inline__ static bool
|
|
_is_hex (char c)
|
|
{
|
|
return (((c >= '0') && (c <= '9')) ||
|
|
((c >= 'A') && (c <= 'F')) || ((c >= 'a') && (c <= 'f')));
|
|
}
|
|
|
|
/* Convert a single hex nibble */
|
|
__inline__ static int
|
|
_from_hex (char c)
|
|
{
|
|
int ret = 0;
|
|
|
|
if ((c >= '0') && (c <= '9'))
|
|
{
|
|
ret = (c - '0');
|
|
}
|
|
else if ((c >= 'a') && (c <= 'f'))
|
|
{
|
|
ret = (c - 'a' + 0x0a);
|
|
}
|
|
else if ((c >= 'A') && (c <= 'F'))
|
|
{
|
|
ret = (c - 'A' + 0x0A);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Convert a character to lower case */
|
|
__inline__ static char
|
|
_tolower (char c)
|
|
{
|
|
if ((c >= 'A') && (c <= 'Z'))
|
|
{
|
|
c = (c - 'A') + 'a';
|
|
}
|
|
return c;
|
|
}
|
|
|
|
/* Parse (scan) a number */
|
|
static bool
|
|
parse_num (char *s, unsigned long *val, char **es, char *delim)
|
|
{
|
|
bool first = true;
|
|
int radix = 10;
|
|
char c;
|
|
unsigned long result = 0;
|
|
int digit;
|
|
|
|
while (*s == ' ')
|
|
s++;
|
|
while (*s)
|
|
{
|
|
if (first && (s[0] == '0') && (_tolower (s[1]) == 'x'))
|
|
{
|
|
radix = 16;
|
|
s += 2;
|
|
}
|
|
first = false;
|
|
c = *s++;
|
|
if (_is_hex (c) && ((digit = _from_hex (c)) < radix))
|
|
{
|
|
/* Valid digit */
|
|
#ifdef CYGPKG_HAL_MIPS
|
|
/* FIXME: tx49 compiler generates 0x2539018 for MUL which */
|
|
/* isn't any good. */
|
|
if (16 == radix)
|
|
result = result << 4;
|
|
else
|
|
result = 10 * result;
|
|
result += digit;
|
|
#else
|
|
result = (result * radix) + digit;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
if (delim != (char *) 0)
|
|
{
|
|
/* See if this character is one of the delimiters */
|
|
char *dp = delim;
|
|
while (*dp && (c != *dp))
|
|
dp++;
|
|
if (*dp)
|
|
break; /* Found a good delimiter */
|
|
}
|
|
return false; /* Malformatted number */
|
|
}
|
|
}
|
|
*val = result;
|
|
if (es != (char **) 0)
|
|
{
|
|
*es = s;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#endif
|
|
|
|
#define USE_SPRINTF
|
|
#ifdef DEBUG
|
|
#ifndef USE_SPRINTF
|
|
/*
|
|
* Note: this debug setup only works if the target platform has two serial ports
|
|
* available so that the other one (currently only port 1) can be used for debug
|
|
* messages.
|
|
*/
|
|
static int
|
|
zm_dprintf (char *fmt, ...)
|
|
{
|
|
int cur_console;
|
|
va_list args;
|
|
|
|
va_start (args, fmt);
|
|
#ifdef REDBOOT
|
|
cur_console =
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM
|
|
(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM (1);
|
|
#endif
|
|
diag_vprintf (fmt, args);
|
|
#ifdef REDBOOT
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM (cur_console);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
zm_flush (void)
|
|
{
|
|
}
|
|
|
|
#else
|
|
/*
|
|
* Note: this debug setup works by storing the strings in a fixed buffer
|
|
*/
|
|
#define FINAL
|
|
#ifdef FINAL
|
|
static char *zm_out = (char *) 0x00380000;
|
|
static char *zm_out_start = (char *) 0x00380000;
|
|
#else
|
|
static char zm_buf[8192];
|
|
static char *zm_out = zm_buf;
|
|
static char *zm_out_start = zm_buf;
|
|
|
|
#endif
|
|
static int
|
|
zm_dprintf (char *fmt, ...)
|
|
{
|
|
int len;
|
|
va_list args;
|
|
|
|
va_start (args, fmt);
|
|
len = diag_vsprintf (zm_out, fmt, args);
|
|
zm_out += len;
|
|
return len;
|
|
}
|
|
|
|
static void
|
|
zm_flush (void)
|
|
{
|
|
#ifdef REDBOOT
|
|
char *p = zm_out_start;
|
|
while (*p)
|
|
mon_write_char (*p++);
|
|
#endif
|
|
zm_out = zm_out_start;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
zm_dump_buf (void *buf, int len)
|
|
{
|
|
#ifdef REDBOOT
|
|
diag_vdump_buf_with_offset (zm_dprintf, buf, len, 0);
|
|
#else
|
|
|
|
#endif
|
|
}
|
|
|
|
static unsigned char zm_buf[2048];
|
|
static unsigned char *zm_bp;
|
|
|
|
static void
|
|
zm_new (void)
|
|
{
|
|
zm_bp = zm_buf;
|
|
}
|
|
|
|
static void
|
|
zm_save (unsigned char c)
|
|
{
|
|
*zm_bp++ = c;
|
|
}
|
|
|
|
static void
|
|
zm_dump (int line)
|
|
{
|
|
zm_dprintf ("Packet at line: %d\n", line);
|
|
zm_dump_buf (zm_buf, zm_bp - zm_buf);
|
|
}
|
|
|
|
#define ZM_DEBUG(x) x
|
|
#else
|
|
#define ZM_DEBUG(x)
|
|
#endif
|
|
|
|
/* Wait for the line to go idle */
|
|
static void
|
|
xyzModem_flush (void)
|
|
{
|
|
int res;
|
|
char c;
|
|
while (true)
|
|
{
|
|
res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
|
|
if (!res)
|
|
return;
|
|
}
|
|
}
|
|
|
|
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_open (connection_info_t * info, int *err)
|
|
{
|
|
#ifdef REDBOOT
|
|
int console_chan;
|
|
#endif
|
|
int stat = 0;
|
|
int retries = xyzModem_MAX_RETRIES;
|
|
int crc_retries = xyzModem_MAX_RETRIES_WITH_CRC;
|
|
|
|
/* ZM_DEBUG(zm_out = zm_out_start); */
|
|
#ifdef xyzModem_zmodem
|
|
if (info->mode == xyzModem_zmodem)
|
|
{
|
|
*err = xyzModem_noZmodem;
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef REDBOOT
|
|
/* Set up the I/O channel. Note: this allows for using a different port in the future */
|
|
console_chan =
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM
|
|
(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
|
|
if (info->chan >= 0)
|
|
{
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM (info->chan);
|
|
}
|
|
else
|
|
{
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
|
|
}
|
|
xyz.__chan = CYGACC_CALL_IF_CONSOLE_PROCS ();
|
|
|
|
CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
|
|
CYGACC_COMM_IF_CONTROL (*xyz.__chan, __COMMCTL_SET_TIMEOUT,
|
|
xyzModem_CHAR_TIMEOUT);
|
|
#else
|
|
/* TODO: CHECK ! */
|
|
int dummy = 0;
|
|
xyz.__chan = &dummy;
|
|
#endif
|
|
xyz.len = 0;
|
|
xyz.crc_mode = true;
|
|
xyz.at_eof = false;
|
|
xyz.tx_ack = false;
|
|
xyz.mode = info->mode;
|
|
xyz.total_retries = 0;
|
|
xyz.total_SOH = 0;
|
|
xyz.total_STX = 0;
|
|
xyz.total_CAN = 0;
|
|
#ifdef USE_YMODEM_LENGTH
|
|
xyz.read_length = 0;
|
|
xyz.file_length = 0;
|
|
#endif
|
|
|
|
CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
|
|
|
|
if (xyz.mode == xyzModem_xmodem)
|
|
{
|
|
/* X-modem doesn't have an information header - exit here */
|
|
xyz.next_blk = 1;
|
|
return 0;
|
|
}
|
|
|
|
while (retries-- > 0)
|
|
{
|
|
stat = xyzModem_get_hdr ();
|
|
if (stat == 0)
|
|
{
|
|
/* Y-modem file information header */
|
|
if (xyz.blk == 0)
|
|
{
|
|
#ifdef USE_YMODEM_LENGTH
|
|
/* skip filename */
|
|
while (*xyz.bufp++);
|
|
/* get the length */
|
|
parse_num ((char *) xyz.bufp, &xyz.file_length, NULL, " ");
|
|
#endif
|
|
/* The rest of the file name data block quietly discarded */
|
|
xyz.tx_ack = true;
|
|
}
|
|
xyz.next_blk = 1;
|
|
xyz.len = 0;
|
|
return 0;
|
|
}
|
|
else if (stat == xyzModem_timeout)
|
|
{
|
|
if (--crc_retries <= 0)
|
|
xyz.crc_mode = false;
|
|
CYGACC_CALL_IF_DELAY_US (5 * 100000); /* Extra delay for startup */
|
|
CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
|
|
xyz.total_retries++;
|
|
ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
|
|
}
|
|
if (stat == xyzModem_cancel)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
*err = stat;
|
|
ZM_DEBUG (zm_flush ());
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
xyzModem_stream_close (int *err)
|
|
{
|
|
diag_printf
|
|
("xyzModem - %s mode, %d(SOH)/%d(STX)/%d(CAN) packets, %d retries\n",
|
|
xyz.crc_mode ? "CRC" : "Cksum", xyz.total_SOH, xyz.total_STX,
|
|
xyz.total_CAN, xyz.total_retries);
|
|
ZM_DEBUG (zm_flush ());
|
|
}
|
|
|
|
/* Need to be able to clean out the input buffer, so have to take the */
|
|
/* 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);
|
|
}
|
|
}
|
|
|
|
char *
|
|
xyzModem_error (int err)
|
|
{
|
|
switch (err)
|
|
{
|
|
case xyzModem_access:
|
|
return "Can't access file";
|
|
break;
|
|
case xyzModem_noZmodem:
|
|
return "Sorry, zModem not available yet";
|
|
break;
|
|
case xyzModem_timeout:
|
|
return "Timed out";
|
|
break;
|
|
case xyzModem_eof:
|
|
return "End of file";
|
|
break;
|
|
case xyzModem_cancel:
|
|
return "Cancelled";
|
|
break;
|
|
case xyzModem_frame:
|
|
return "Invalid framing";
|
|
break;
|
|
case xyzModem_cksum:
|
|
return "CRC/checksum error";
|
|
break;
|
|
case xyzModem_sequence:
|
|
return "Block sequence error";
|
|
break;
|
|
default:
|
|
return "Unknown error";
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* RedBoot interface
|
|
*/
|
|
#if 0 /* SB */
|
|
GETC_IO_FUNCS (xyzModem_io, xyzModem_stream_open, xyzModem_stream_close,
|
|
xyzModem_stream_terminate, xyzModem_stream_read,
|
|
xyzModem_error);
|
|
RedBoot_load (xmodem, xyzModem_io, false, false, xyzModem_xmodem);
|
|
RedBoot_load (ymodem, xyzModem_io, false, false, xyzModem_ymodem);
|
|
#endif
|