ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/uboot/common/xyzModem.c b/marvell/uboot/common/xyzModem.c
new file mode 100644
index 0000000..39f7d17
--- /dev/null
+++ b/marvell/uboot/common/xyzModem.c
@@ -0,0 +1,817 @@
+/*
+ *==========================================================================
+ *
+ * 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