2 *==========================================================================
6 * RedBoot stream handler for xyzModem protocol
8 *==========================================================================
9 *####ECOSGPLCOPYRIGHTBEGIN####
10 * -------------------------------------------
11 * This file is part of eCos, the Embedded Configurable Operating System.
12 * Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 * Copyright (C) 2002 Gary Thomas
15 * eCos is free software; you can redistribute it and/or modify it under
16 * the terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 2 or (at your option) any later version.
19 * eCos is distributed in the hope that it will be useful, but WITHOUT ANY
20 * WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
24 * You should have received a copy of the GNU General Public License along
25 * with eCos; if not, write to the Free Software Foundation, Inc.,
26 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
28 * As a special exception, if other files instantiate templates or use macros
29 * or inline functions from this file, or you compile this file and link it
30 * with other works to produce a work based on this file, this file does not
31 * by itself cause the resulting work to be covered by the GNU General Public
32 * License. However the source code for this file must still be made available
33 * in accordance with section (3) of the GNU General Public License.
35 * This exception does not invalidate any other reasons why a work based on
36 * this file might be covered by the GNU General Public License.
38 * Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
39 * at http: *sources.redhat.com/ecos/ecos-license/
40 * -------------------------------------------
41 *####ECOSGPLCOPYRIGHTEND####
42 *==========================================================================
43 *#####DESCRIPTIONBEGIN####
46 * Contributors: gthomas, tsmith, Yoshinori Sato
51 * This code is part of RedBoot (tm).
53 *####DESCRIPTIONEND####
55 *==========================================================================
62 /* Assumption - run xyzModem protocol over the console port */
64 /* Values magic to the protocol */
72 #define EOF 0x1A /* ^Z for DOS officionados */
74 #define USE_YMODEM_LENGTH
76 /* Data & state local to the protocol */
80 hal_virtual_comm_table_t *__chan;
84 unsigned char pkt[1024], *bufp;
85 unsigned char blk, cblk, crc1, crc2;
86 unsigned char next_blk; /* Expected block */
87 int len, mode, total_retries;
88 int total_SOH, total_STX, total_CAN;
89 bool crc_mode, at_eof, tx_ack;
90 #ifdef USE_YMODEM_LENGTH
91 unsigned long file_length, read_length;
95 #define xyzModem_CHAR_TIMEOUT 2000 /* 2 seconds */
96 #define xyzModem_MAX_RETRIES 20
97 #define xyzModem_MAX_RETRIES_WITH_CRC 10
98 #define xyzModem_CAN_COUNT 3 /* Wait for 3 CAN before quitting */
101 #ifndef REDBOOT /*SB */
102 typedef int cyg_int32;
104 CYGACC_COMM_IF_GETC_TIMEOUT (char chan, char *c)
107 unsigned long counter = 0;
108 while (!tstc () && (counter < xyzModem_CHAR_TIMEOUT * 1000 / DELAY))
122 CYGACC_COMM_IF_PUTC (char x, char y)
127 /* Validate a hex character */
128 __inline__ static bool
131 return (((c >= '0') && (c <= '9')) ||
132 ((c >= 'A') && (c <= 'F')) || ((c >= 'a') && (c <= 'f')));
135 /* Convert a single hex nibble */
136 __inline__ static int
141 if ((c >= '0') && (c <= '9'))
145 else if ((c >= 'a') && (c <= 'f'))
147 ret = (c - 'a' + 0x0a);
149 else if ((c >= 'A') && (c <= 'F'))
151 ret = (c - 'A' + 0x0A);
156 /* Convert a character to lower case */
157 __inline__ static char
160 if ((c >= 'A') && (c <= 'Z'))
167 /* Parse (scan) a number */
169 parse_num (char *s, unsigned long *val, char **es, char *delim)
174 unsigned long result = 0;
181 if (first && (s[0] == '0') && (_tolower (s[1]) == 'x'))
188 if (_is_hex (c) && ((digit = _from_hex (c)) < radix))
191 #ifdef CYGPKG_HAL_MIPS
192 /* FIXME: tx49 compiler generates 0x2539018 for MUL which */
193 /* isn't any good. */
195 result = result << 4;
197 result = 10 * result;
200 result = (result * radix) + digit;
205 if (delim != (char *) 0)
207 /* See if this character is one of the delimiters */
209 while (*dp && (c != *dp))
212 break; /* Found a good delimiter */
214 return false; /* Malformatted number */
218 if (es != (char **) 0)
231 * Note: this debug setup only works if the target platform has two serial ports
232 * available so that the other one (currently only port 1) can be used for debug
236 zm_dprintf (char *fmt, ...)
241 va_start (args, fmt);
244 CYGACC_CALL_IF_SET_CONSOLE_COMM
245 (CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
246 CYGACC_CALL_IF_SET_CONSOLE_COMM (1);
248 diag_vprintf (fmt, args);
250 CYGACC_CALL_IF_SET_CONSOLE_COMM (cur_console);
261 * Note: this debug setup works by storing the strings in a fixed buffer
265 static char *zm_out = (char *) 0x00380000;
266 static char *zm_out_start = (char *) 0x00380000;
268 static char zm_buf[8192];
269 static char *zm_out = zm_buf;
270 static char *zm_out_start = zm_buf;
274 zm_dprintf (char *fmt, ...)
279 va_start (args, fmt);
280 len = diag_vsprintf (zm_out, fmt, args);
289 char *p = zm_out_start;
291 mon_write_char (*p++);
293 zm_out = zm_out_start;
298 zm_dump_buf (void *buf, int len)
301 diag_vdump_buf_with_offset (zm_dprintf, buf, len, 0);
307 static unsigned char zm_buf[2048];
308 static unsigned char *zm_bp;
317 zm_save (unsigned char c)
325 zm_dprintf ("Packet at line: %d\n", line);
326 zm_dump_buf (zm_buf, zm_bp - zm_buf);
329 #define ZM_DEBUG(x) x
334 /* Wait for the line to go idle */
336 xyzModem_flush (void)
342 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
349 xyzModem_get_hdr (void)
353 bool hdr_found = false;
354 int i, can_total, hdr_chars;
355 unsigned short cksum;
357 ZM_DEBUG (zm_new ());
358 /* Find the start of a header */
364 CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
369 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
370 ZM_DEBUG (zm_save (c));
385 ZM_DEBUG (zm_dump (__LINE__));
386 if (++can_total == xyzModem_CAN_COUNT)
388 return xyzModem_cancel;
392 /* Wait for multiple CAN to avoid early quits */
396 /* EOT only supported if no noise */
399 CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
400 ZM_DEBUG (zm_dprintf ("ACK on EOT #%d\n", __LINE__));
401 ZM_DEBUG (zm_dump (__LINE__));
405 /* Ignore, waiting for start of header */
411 /* Data stream timed out */
412 xyzModem_flush (); /* Toss any current input */
413 ZM_DEBUG (zm_dump (__LINE__));
414 CYGACC_CALL_IF_DELAY_US ((cyg_int32) 250000);
415 return xyzModem_timeout;
419 /* Header found, now read the data */
420 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.blk);
421 ZM_DEBUG (zm_save (xyz.blk));
424 ZM_DEBUG (zm_dump (__LINE__));
425 return xyzModem_timeout;
427 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.cblk);
428 ZM_DEBUG (zm_save (xyz.cblk));
431 ZM_DEBUG (zm_dump (__LINE__));
432 return xyzModem_timeout;
434 xyz.len = (c == SOH) ? 128 : 1024;
436 for (i = 0; i < xyz.len; i++)
438 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, &c);
439 ZM_DEBUG (zm_save (c));
446 ZM_DEBUG (zm_dump (__LINE__));
447 return xyzModem_timeout;
450 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.crc1);
451 ZM_DEBUG (zm_save (xyz.crc1));
454 ZM_DEBUG (zm_dump (__LINE__));
455 return xyzModem_timeout;
459 res = CYGACC_COMM_IF_GETC_TIMEOUT (*xyz.__chan, (char *) &xyz.crc2);
460 ZM_DEBUG (zm_save (xyz.crc2));
463 ZM_DEBUG (zm_dump (__LINE__));
464 return xyzModem_timeout;
467 ZM_DEBUG (zm_dump (__LINE__));
468 /* Validate the message */
469 if ((xyz.blk ^ xyz.cblk) != (unsigned char) 0xFF)
472 ("Framing error - blk: %x/%x/%x\n", xyz.blk, xyz.cblk,
473 (xyz.blk ^ xyz.cblk)));
474 ZM_DEBUG (zm_dump_buf (xyz.pkt, xyz.len));
476 return xyzModem_frame;
478 /* Verify checksum/CRC */
481 cksum = cyg_crc16 (xyz.pkt, xyz.len);
482 if (cksum != ((xyz.crc1 << 8) | xyz.crc2))
484 ZM_DEBUG (zm_dprintf ("CRC error - recvd: %02x%02x, computed: %x\n",
485 xyz.crc1, xyz.crc2, cksum & 0xFFFF));
486 return xyzModem_cksum;
492 for (i = 0; i < xyz.len; i++)
496 if (xyz.crc1 != (cksum & 0xFF))
499 ("Checksum error - recvd: %x, computed: %x\n", xyz.crc1,
501 return xyzModem_cksum;
504 /* If we get here, the message passes [structural] muster */
509 xyzModem_stream_open (connection_info_t * info, int *err)
515 int retries = xyzModem_MAX_RETRIES;
516 int crc_retries = xyzModem_MAX_RETRIES_WITH_CRC;
518 /* ZM_DEBUG(zm_out = zm_out_start); */
519 #ifdef xyzModem_zmodem
520 if (info->mode == xyzModem_zmodem)
522 *err = xyzModem_noZmodem;
528 /* Set up the I/O channel. Note: this allows for using a different port in the future */
530 CYGACC_CALL_IF_SET_CONSOLE_COMM
531 (CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
534 CYGACC_CALL_IF_SET_CONSOLE_COMM (info->chan);
538 CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
540 xyz.__chan = CYGACC_CALL_IF_CONSOLE_PROCS ();
542 CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
543 CYGACC_COMM_IF_CONTROL (*xyz.__chan, __COMMCTL_SET_TIMEOUT,
544 xyzModem_CHAR_TIMEOUT);
554 xyz.mode = info->mode;
555 xyz.total_retries = 0;
559 #ifdef USE_YMODEM_LENGTH
564 CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
566 if (xyz.mode == xyzModem_xmodem)
568 /* X-modem doesn't have an information header - exit here */
573 while (retries-- > 0)
575 stat = xyzModem_get_hdr ();
578 /* Y-modem file information header */
581 #ifdef USE_YMODEM_LENGTH
585 parse_num ((char *) xyz.bufp, &xyz.file_length, NULL, " ");
587 /* The rest of the file name data block quietly discarded */
594 else if (stat == xyzModem_timeout)
596 if (--crc_retries <= 0)
597 xyz.crc_mode = false;
598 CYGACC_CALL_IF_DELAY_US (5 * 100000); /* Extra delay for startup */
599 CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
601 ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
603 if (stat == xyzModem_cancel)
609 ZM_DEBUG (zm_flush ());
614 xyzModem_stream_read (char *buf, int size, int *err)
616 int stat, total, len;
620 stat = xyzModem_cancel;
621 /* Try and get 'size' bytes into the buffer */
622 while (!xyz.at_eof && (size > 0))
626 retries = xyzModem_MAX_RETRIES;
627 while (retries-- > 0)
629 stat = xyzModem_get_hdr ();
632 if (xyz.blk == xyz.next_blk)
636 ("ACK block %d (%d)\n", xyz.blk, __LINE__));
637 xyz.next_blk = (xyz.next_blk + 1) & 0xFF;
639 #if defined(xyzModem_zmodem) || defined(USE_YMODEM_LENGTH)
640 if (xyz.mode == xyzModem_xmodem || xyz.file_length == 0)
646 /* Data blocks can be padded with ^Z (EOF) characters */
647 /* This code tries to detect and remove them */
648 if ((xyz.bufp[xyz.len - 1] == EOF) &&
649 (xyz.bufp[xyz.len - 2] == EOF) &&
650 (xyz.bufp[xyz.len - 3] == EOF))
653 && (xyz.bufp[xyz.len - 1] == EOF))
660 #ifdef USE_YMODEM_LENGTH
662 * See if accumulated length exceeds that of the file.
663 * If so, reduce size (i.e., cut out pad bytes)
664 * Only do this for Y-modem (and Z-modem should it ever
665 * be supported since it can fall back to Y-modem mode).
667 if (xyz.mode != xyzModem_xmodem && 0 != xyz.file_length)
669 xyz.read_length += xyz.len;
670 if (xyz.read_length > xyz.file_length)
672 xyz.len -= (xyz.read_length - xyz.file_length);
678 else if (xyz.blk == ((xyz.next_blk - 1) & 0xFF))
680 /* Just re-ACK this so sender will get on with it */
681 CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
682 continue; /* Need new header */
686 stat = xyzModem_sequence;
689 if (stat == xyzModem_cancel)
693 if (stat == xyzModem_eof)
695 CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
696 ZM_DEBUG (zm_dprintf ("ACK (%d)\n", __LINE__));
697 if (xyz.mode == xyzModem_ymodem)
699 CYGACC_COMM_IF_PUTC (*xyz.__chan,
700 (xyz.crc_mode ? 'C' : NAK));
702 ZM_DEBUG (zm_dprintf ("Reading Final Header\n"));
703 stat = xyzModem_get_hdr ();
704 CYGACC_COMM_IF_PUTC (*xyz.__chan, ACK);
705 ZM_DEBUG (zm_dprintf ("FINAL ACK (%d)\n", __LINE__));
710 CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
712 ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
721 /* Don't "read" data from the EOF protocol package */
727 memcpy (buf, xyz.bufp, len);
739 xyzModem_stream_close (int *err)
742 ("xyzModem - %s mode, %d(SOH)/%d(STX)/%d(CAN) packets, %d retries\n",
743 xyz.crc_mode ? "CRC" : "Cksum", xyz.total_SOH, xyz.total_STX,
744 xyz.total_CAN, xyz.total_retries);
745 ZM_DEBUG (zm_flush ());
748 /* Need to be able to clean out the input buffer, so have to take the */
751 xyzModem_stream_terminate (bool abort, int (*getc) (void))
757 ZM_DEBUG (zm_dprintf ("!!!! TRANSFER ABORT !!!!\n"));
760 case xyzModem_xmodem:
761 case xyzModem_ymodem:
762 /* The X/YMODEM Spec seems to suggest that multiple CAN followed by an equal */
763 /* number of Backspaces is a friendly way to get the other end to abort. */
764 CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
765 CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
766 CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
767 CYGACC_COMM_IF_PUTC (*xyz.__chan, CAN);
768 CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
769 CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
770 CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
771 CYGACC_COMM_IF_PUTC (*xyz.__chan, BSP);
772 /* Now consume the rest of what's waiting on the line. */
773 ZM_DEBUG (zm_dprintf ("Flushing serial line.\n"));
777 #ifdef xyzModem_zmodem
778 case xyzModem_zmodem:
779 /* Might support it some day I suppose. */
786 ZM_DEBUG (zm_dprintf ("Engaging cleanup mode...\n"));
788 * Consume any trailing crap left in the inbuffer from
789 * previous recieved blocks. Since very few files are an exact multiple
790 * of the transfer block size, there will almost always be some gunk here.
791 * If we don't eat it now, RedBoot will think the user typed it.
793 ZM_DEBUG (zm_dprintf ("Trailing gunk:\n"));
794 while ((c = (*getc) ()) > -1);
795 ZM_DEBUG (zm_dprintf ("\n"));
797 * Make a small delay to give terminal programs like minicom
798 * time to get control again after their file transfer program
801 CYGACC_CALL_IF_DELAY_US ((cyg_int32) 250000);
806 xyzModem_error (int err)
810 case xyzModem_access:
811 return "Can't access file";
813 case xyzModem_noZmodem:
814 return "Sorry, zModem not available yet";
816 case xyzModem_timeout:
820 return "End of file";
822 case xyzModem_cancel:
826 return "Invalid framing";
829 return "CRC/checksum error";
831 case xyzModem_sequence:
832 return "Block sequence error";
835 return "Unknown error";
844 GETC_IO_FUNCS (xyzModem_io, xyzModem_stream_open, xyzModem_stream_close,
845 xyzModem_stream_terminate, xyzModem_stream_read,
847 RedBoot_load (xmodem, xyzModem_io, false, false, xyzModem_xmodem);
848 RedBoot_load (ymodem, xyzModem_io, false, false, xyzModem_ymodem);