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	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
 |