652 lines
16 KiB
C
652 lines
16 KiB
C
/*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Serial up- and download support
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*/
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#include <common.h>
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#include <command.h>
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#include <s_record.h>
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#include <net.h>
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#include <exports.h>
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#include <xyzModem.h>
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DECLARE_GLOBAL_DATA_PTR;
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static ulong load_serial_ymodem (ulong offset);
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#define XON_CHAR 17
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#define XOFF_CHAR 19
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#define START_CHAR 0x01
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#define ETX_CHAR 0x03
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#define END_CHAR 0x0D
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#define SPACE 0x20
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#define K_ESCAPE 0x23
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#define SEND_TYPE 'S'
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#define DATA_TYPE 'D'
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#define ACK_TYPE 'Y'
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#define NACK_TYPE 'N'
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#define BREAK_TYPE 'B'
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#define tochar(x) ((char) (((x) + SPACE) & 0xff))
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#define untochar(x) ((int) (((x) - SPACE) & 0xff))
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extern int os_data_count;
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extern int os_data_header[8];
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static void set_kerm_bin_mode(unsigned long *);
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static int k_recv(void);
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static ulong load_serial_bin (ulong offset);
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char his_eol; /* character he needs at end of packet */
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int his_pad_count; /* number of pad chars he needs */
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char his_pad_char; /* pad chars he needs */
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char his_quote; /* quote chars he'll use */
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int do_load_serial_bin (cmd_tbl_t *cmdtp, int argc, char *argv[])
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{
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ulong offset = 0;
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ulong addr;
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int load_baudrate, current_baudrate;
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int rcode = 0;
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char *s;
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/* pre-set offset from CFG_LOAD_ADDR */
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offset = CFG_LOAD_ADDR;
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/* pre-set offset from $loadaddr */
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if ((s = getenv("loadaddr")) != NULL) {
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offset = simple_strtoul(s, NULL, 16);
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}
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load_baudrate = current_baudrate = gd->baudrate;
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if (argc >= 2) {
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offset = simple_strtoul(argv[1], NULL, 16);
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}
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if (argc == 3) {
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load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
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/* default to current baudrate */
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if (load_baudrate == 0)
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load_baudrate = current_baudrate;
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}
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if (load_baudrate != current_baudrate) {
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printf ("## Switch baudrate to %d bps and press ENTER ...\n",
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load_baudrate);
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udelay(50000);
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gd->baudrate = load_baudrate;
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serial_setbrg ();
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udelay(50000);
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for (;;) {
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if (getc() == '\r')
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break;
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}
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}
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if (strcmp(argv[0],"loady")==0) {
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printf ("## Ready for binary (ymodem) download "
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"to 0x%08lX at %d bps...\n",
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offset,
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load_baudrate);
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addr = load_serial_ymodem (offset);
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} else {
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printf ("## Ready for binary (kermit) download "
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"to 0x%08lX at %d bps...\n",
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offset,
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load_baudrate);
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addr = load_serial_bin (offset);
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if (addr == ~0) {
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load_addr = 0;
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printf ("## Binary (kermit) download aborted\n");
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rcode = 1;
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} else {
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printf ("## Start Addr = 0x%08lX\n", addr);
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load_addr = addr;
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}
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}
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if (load_baudrate != current_baudrate) {
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printf ("## Switch baudrate to %d bps and press ESC ...\n",
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current_baudrate);
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udelay (50000);
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gd->baudrate = current_baudrate;
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serial_setbrg ();
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udelay (50000);
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for (;;) {
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if (getc() == 0x1B) /* ESC */
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break;
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}
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}
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return rcode;
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}
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static ulong load_serial_bin (ulong offset)
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{
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int size, i;
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char buf[32];
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set_kerm_bin_mode ((ulong *) offset);
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size = k_recv ();
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/*
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* Gather any trailing characters (for instance, the ^D which
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* is sent by 'cu' after sending a file), and give the
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* box some time (100 * 1 ms)
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*/
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for (i=0; i<100; ++i) {
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if (tstc()) {
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(void) getc();
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}
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udelay(1000);
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}
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flush_cache (offset, size);
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printf("## Total Size = 0x%08x = %d Bytes\n", size, size);
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sprintf(buf, "%X", size);
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setenv("filesize", buf);
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return offset;
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}
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void send_pad (void)
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{
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int count = his_pad_count;
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while (count-- > 0)
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putc (his_pad_char);
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}
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/* converts escaped kermit char to binary char */
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char ktrans (char in)
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{
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if ((in & 0x60) == 0x40) {
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return (char) (in & ~0x40);
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} else if ((in & 0x7f) == 0x3f) {
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return (char) (in | 0x40);
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} else
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return in;
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}
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int chk1 (char *buffer)
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{
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int total = 0;
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while (*buffer) {
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total += *buffer++;
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}
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return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
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}
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void s1_sendpacket (char *packet)
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{
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send_pad ();
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while (*packet) {
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putc (*packet++);
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}
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}
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static char a_b[24];
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void send_ack (int n)
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{
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a_b[0] = START_CHAR;
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a_b[1] = tochar (3);
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a_b[2] = tochar (n);
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a_b[3] = ACK_TYPE;
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a_b[4] = '\0';
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a_b[4] = tochar (chk1 (&a_b[1]));
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a_b[5] = his_eol;
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a_b[6] = '\0';
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s1_sendpacket (a_b);
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}
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void send_nack (int n)
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{
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a_b[0] = START_CHAR;
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a_b[1] = tochar (3);
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a_b[2] = tochar (n);
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a_b[3] = NACK_TYPE;
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a_b[4] = '\0';
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a_b[4] = tochar (chk1 (&a_b[1]));
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a_b[5] = his_eol;
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a_b[6] = '\0';
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s1_sendpacket (a_b);
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}
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/* os_data_* takes an OS Open image and puts it into memory, and
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puts the boot header in an array named os_data_header
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if image is binary, no header is stored in os_data_header.
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*/
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void (*os_data_init) (void);
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void (*os_data_char) (char new_char);
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static int os_data_state, os_data_state_saved;
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int os_data_count;
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static int os_data_count_saved;
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static char *os_data_addr, *os_data_addr_saved;
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static char *bin_start_address;
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int os_data_header[8];
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static void bin_data_init (void)
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{
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os_data_state = 0;
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os_data_count = 0;
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os_data_addr = bin_start_address;
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}
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static void os_data_save (void)
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{
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os_data_state_saved = os_data_state;
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os_data_count_saved = os_data_count;
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os_data_addr_saved = os_data_addr;
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}
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static void os_data_restore (void)
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{
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os_data_state = os_data_state_saved;
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os_data_count = os_data_count_saved;
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os_data_addr = os_data_addr_saved;
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}
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static void bin_data_char (char new_char)
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{
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switch (os_data_state) {
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case 0: /* data */
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*os_data_addr++ = new_char;
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--os_data_count;
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break;
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}
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}
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static void set_kerm_bin_mode (unsigned long *addr)
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{
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bin_start_address = (char *) addr;
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os_data_init = bin_data_init;
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os_data_char = bin_data_char;
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}
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/* k_data_* simply handles the kermit escape translations */
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static int k_data_escape, k_data_escape_saved;
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void k_data_init (void)
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{
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k_data_escape = 0;
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os_data_init ();
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}
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void k_data_save (void)
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{
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k_data_escape_saved = k_data_escape;
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os_data_save ();
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}
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void k_data_restore (void)
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{
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k_data_escape = k_data_escape_saved;
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os_data_restore ();
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}
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void k_data_char (char new_char)
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{
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if (k_data_escape) {
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/* last char was escape - translate this character */
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os_data_char (ktrans (new_char));
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k_data_escape = 0;
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} else {
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if (new_char == his_quote) {
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/* this char is escape - remember */
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k_data_escape = 1;
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} else {
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/* otherwise send this char as-is */
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os_data_char (new_char);
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}
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}
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}
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#define SEND_DATA_SIZE 20
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char send_parms[SEND_DATA_SIZE];
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char *send_ptr;
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/* handle_send_packet interprits the protocol info and builds and
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sends an appropriate ack for what we can do */
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void handle_send_packet (int n)
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{
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int length = 3;
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int bytes;
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/* initialize some protocol parameters */
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his_eol = END_CHAR; /* default end of line character */
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his_pad_count = 0;
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his_pad_char = '\0';
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his_quote = K_ESCAPE;
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/* ignore last character if it filled the buffer */
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if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
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--send_ptr;
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bytes = send_ptr - send_parms; /* how many bytes we'll process */
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do {
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if (bytes-- <= 0)
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break;
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/* handle MAXL - max length */
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/* ignore what he says - most I'll take (here) is 94 */
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a_b[++length] = tochar (94);
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if (bytes-- <= 0)
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break;
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/* handle TIME - time you should wait for my packets */
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/* ignore what he says - don't wait for my ack longer than 1 second */
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a_b[++length] = tochar (1);
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if (bytes-- <= 0)
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break;
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/* handle NPAD - number of pad chars I need */
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/* remember what he says - I need none */
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his_pad_count = untochar (send_parms[2]);
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a_b[++length] = tochar (0);
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if (bytes-- <= 0)
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break;
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/* handle PADC - pad chars I need */
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/* remember what he says - I need none */
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his_pad_char = ktrans (send_parms[3]);
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a_b[++length] = 0x40; /* He should ignore this */
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if (bytes-- <= 0)
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break;
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/* handle EOL - end of line he needs */
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/* remember what he says - I need CR */
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his_eol = untochar (send_parms[4]);
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a_b[++length] = tochar (END_CHAR);
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if (bytes-- <= 0)
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break;
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/* handle QCTL - quote control char he'll use */
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/* remember what he says - I'll use '#' */
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his_quote = send_parms[5];
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a_b[++length] = '#';
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if (bytes-- <= 0)
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break;
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/* handle QBIN - 8-th bit prefixing */
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/* ignore what he says - I refuse */
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a_b[++length] = 'N';
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if (bytes-- <= 0)
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break;
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/* handle CHKT - the clock check type */
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/* ignore what he says - I do type 1 (for now) */
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a_b[++length] = '1';
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if (bytes-- <= 0)
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break;
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/* handle REPT - the repeat prefix */
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/* ignore what he says - I refuse (for now) */
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a_b[++length] = 'N';
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if (bytes-- <= 0)
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break;
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/* handle CAPAS - the capabilities mask */
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/* ignore what he says - I only do long packets - I don't do windows */
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a_b[++length] = tochar (2); /* only long packets */
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a_b[++length] = tochar (0); /* no windows */
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a_b[++length] = tochar (94); /* large packet msb */
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a_b[++length] = tochar (94); /* large packet lsb */
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} while (0);
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a_b[0] = START_CHAR;
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a_b[1] = tochar (length);
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a_b[2] = tochar (n);
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a_b[3] = ACK_TYPE;
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a_b[++length] = '\0';
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a_b[length] = tochar (chk1 (&a_b[1]));
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a_b[++length] = his_eol;
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a_b[++length] = '\0';
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s1_sendpacket (a_b);
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}
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/* k_recv receives a OS Open image file over kermit line */
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static int k_recv (void)
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{
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char new_char;
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char k_state, k_state_saved;
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int sum;
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int done;
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int length;
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int n, last_n;
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int z = 0;
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int len_lo, len_hi;
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/* initialize some protocol parameters */
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his_eol = END_CHAR; /* default end of line character */
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his_pad_count = 0;
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his_pad_char = '\0';
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his_quote = K_ESCAPE;
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/* initialize the k_recv and k_data state machine */
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done = 0;
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k_state = 0;
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k_data_init ();
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k_state_saved = k_state;
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k_data_save ();
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n = 0; /* just to get rid of a warning */
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last_n = -1;
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/* expect this "type" sequence (but don't check):
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S: send initiate
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F: file header
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D: data (multiple)
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Z: end of file
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B: break transmission
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*/
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/* enter main loop */
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while (!done) {
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/* set the send packet pointer to begining of send packet parms */
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send_ptr = send_parms;
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/* With each packet, start summing the bytes starting with the length.
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Save the current sequence number.
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Note the type of the packet.
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If a character less than SPACE (0x20) is received - error.
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*/
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/* get a packet */
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/* wait for the starting character or ^C */
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for (;;) {
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switch (getc ()) {
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case START_CHAR: /* start packet */
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goto START;
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case ETX_CHAR: /* ^C waiting for packet */
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return (0);
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default:
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;
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}
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}
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START:
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/* get length of packet */
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sum = 0;
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new_char = getc ();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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length = untochar (new_char);
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/* get sequence number */
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new_char = getc ();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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n = untochar (new_char);
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--length;
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/* NEW CODE - check sequence numbers for retried packets */
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/* Note - this new code assumes that the sequence number is correctly
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* received. Handling an invalid sequence number adds another layer
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* of complexity that may not be needed - yet! At this time, I'm hoping
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* that I don't need to buffer the incoming data packets and can write
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* the data into memory in real time.
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*/
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if (n == last_n) {
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/* same sequence number, restore the previous state */
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k_state = k_state_saved;
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k_data_restore ();
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} else {
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/* new sequence number, checkpoint the download */
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last_n = n;
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k_state_saved = k_state;
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k_data_save ();
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}
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/* END NEW CODE */
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/* get packet type */
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new_char = getc ();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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k_state = new_char;
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--length;
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/* check for extended length */
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if (length == -2) {
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/* (length byte was 0, decremented twice) */
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/* get the two length bytes */
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new_char = getc ();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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len_hi = untochar (new_char);
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new_char = getc ();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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len_lo = untochar (new_char);
|
|
length = len_hi * 95 + len_lo;
|
|
/* check header checksum */
|
|
new_char = getc ();
|
|
if ((new_char & 0xE0) == 0)
|
|
goto packet_error;
|
|
if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
|
|
goto packet_error;
|
|
sum += new_char & 0xff;
|
|
/* --length; */ /* new length includes only data and block check to come */
|
|
}
|
|
/* bring in rest of packet */
|
|
while (length > 1) {
|
|
new_char = getc ();
|
|
if ((new_char & 0xE0) == 0)
|
|
goto packet_error;
|
|
sum += new_char & 0xff;
|
|
--length;
|
|
if (k_state == DATA_TYPE) {
|
|
/* pass on the data if this is a data packet */
|
|
k_data_char (new_char);
|
|
} else if (k_state == SEND_TYPE) {
|
|
/* save send pack in buffer as is */
|
|
*send_ptr++ = new_char;
|
|
/* if too much data, back off the pointer */
|
|
if (send_ptr >= &send_parms[SEND_DATA_SIZE])
|
|
--send_ptr;
|
|
}
|
|
}
|
|
/* get and validate checksum character */
|
|
new_char = getc ();
|
|
if ((new_char & 0xE0) == 0)
|
|
goto packet_error;
|
|
if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
|
|
goto packet_error;
|
|
/* get END_CHAR */
|
|
new_char = getc ();
|
|
if (new_char != END_CHAR) {
|
|
packet_error:
|
|
/* restore state machines */
|
|
k_state = k_state_saved;
|
|
k_data_restore ();
|
|
/* send a negative acknowledge packet in */
|
|
send_nack (n);
|
|
} else if (k_state == SEND_TYPE) {
|
|
/* crack the protocol parms, build an appropriate ack packet */
|
|
handle_send_packet (n);
|
|
} else {
|
|
/* send simple acknowledge packet in */
|
|
send_ack (n);
|
|
/* quit if end of transmission */
|
|
if (k_state == BREAK_TYPE)
|
|
done = 1;
|
|
}
|
|
++z;
|
|
}
|
|
return ((ulong) os_data_addr - (ulong) bin_start_address);
|
|
}
|
|
|
|
static int getcxmodem(void) {
|
|
if (tstc())
|
|
return (getc());
|
|
return -1;
|
|
}
|
|
static ulong load_serial_ymodem (ulong offset)
|
|
{
|
|
int size;
|
|
char buf[32];
|
|
int err;
|
|
int res;
|
|
connection_info_t info;
|
|
char ymodemBuf[1024];
|
|
ulong store_addr = ~0;
|
|
ulong addr = 0;
|
|
|
|
size = 0;
|
|
info.mode = xyzModem_ymodem;
|
|
res = xyzModem_stream_open (&info, &err);
|
|
if (!res) {
|
|
|
|
while ((res =
|
|
xyzModem_stream_read (ymodemBuf, 1024, &err)) > 0) {
|
|
store_addr = addr + offset;
|
|
size += res;
|
|
addr += res;
|
|
memcpy ((char *) (store_addr), ymodemBuf, res);
|
|
|
|
}
|
|
} else {
|
|
printf ("%s\n", xyzModem_error (err));
|
|
}
|
|
|
|
xyzModem_stream_close (&err);
|
|
xyzModem_stream_terminate (false, &getcxmodem);
|
|
|
|
|
|
flush_cache (offset, size);
|
|
|
|
printf ("## Total Size = 0x%08x = %d Bytes\n", size, size);
|
|
sprintf (buf, "%X", size);
|
|
setenv ("filesize", buf);
|
|
|
|
return offset;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
loadb, 3, 0, do_load_serial_bin,
|
|
"loadb - load binary file over serial line (kermit mode)\n",
|
|
"[ off ] [ baud ]\n"
|
|
" - load binary file over serial line"
|
|
" with offset 'off' and baudrate 'baud'\n"
|
|
);
|
|
|
|
U_BOOT_CMD(
|
|
loady, 3, 0, do_load_serial_bin,
|
|
"loady - load binary file over serial line (ymodem mode)\n",
|
|
"[ off ] [ baud ]\n"
|
|
" - load binary file over serial line"
|
|
" with offset 'off' and baudrate 'baud'\n"
|
|
);
|