// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: © 2000-2004 Wolfgang Denk <wd@denx.de>, DENX Software Engineering
/* Serial up- and download support */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <s_record.h>
#include <net.h>
static ulong load_serial(ulong offset);
static int read_record(char *buf, ulong len);
static int do_echo = 1;
#ifdef CONFIG_CMD_SAVES
static int save_serial(ulong offset, ulong size);
static int write_record(char *buf);
#endif /* CONFIG_CMD_SAVES */
static int do_load_serial(int argc, char *argv[])
{
ulong offset = 0;
ulong addr;
int i;
int rcode = 0;
getenv_bool("loads_echo", &do_echo);
if (argc == 2) {
offset = simple_strtoul(argv[1], NULL, 16);
}
printf ("## Ready for S-Record download ...\n");
addr = load_serial(offset);
/*
* Gather any trailing characters (for instance, the ^D which
* is sent by 'cu' after sending a file), and give the
* box some time (100 * 1 ms)
*/
for (i=0; i<100; ++i) {
if (tstc()) {
(void) getchar();
}
udelay(1000);
}
if (addr == ~0) {
printf("## S-Record download aborted\n");
rcode = 1;
} else {
printf("## Start Addr = 0x%08lX\n", addr);
}
return rcode;
}
static ulong load_serial(ulong offset)
{
char record[SREC_MAXRECLEN + 1]; /* buffer for one S-Record */
char binbuf[SREC_MAXBINLEN]; /* buffer for binary data */
int binlen; /* no. of data bytes in S-Rec. */
int type; /* return code for record type */
ulong addr; /* load address from S-Record */
ulong size; /* number of bytes transferred */
char buf[32];
ulong store_addr;
ulong start_addr = ~0;
ulong end_addr = 0;
int line_count = 0;
while (read_record(record, SREC_MAXRECLEN + 1) >= 0) {
type = srec_decode(record, &binlen, &addr, binbuf);
if (type < 0) {
return ~0; /* Invalid S-Record */
}
switch (type) {
case SREC_DATA2:
case SREC_DATA3:
case SREC_DATA4:
store_addr = addr + offset;
memcpy((char *)(store_addr), binbuf, binlen);
if ((store_addr) < start_addr)
start_addr = store_addr;
if ((store_addr + binlen - 1) > end_addr)
end_addr = store_addr + binlen - 1;
break;
case SREC_END2:
case SREC_END3:
case SREC_END4:
udelay(10000);
size = end_addr - start_addr + 1;
printf("\n"
"## First Load Addr = 0x%08lX\n"
"## Last Load Addr = 0x%08lX\n"
"## Total Size = 0x%08lX = %ld Bytes\n",
start_addr, end_addr, size, size
);
sprintf(buf, "%lX", size);
setenv("filesize", buf);
return addr;
case SREC_START:
break;
default:
break;
}
if (!do_echo) { /* print a '.' every 100 lines */
if ((++line_count % 100) == 0)
putchar('.');
}
}
return ~0; /* Download aborted */
}
static int read_record(char *buf, ulong len)
{
char *p;
char c;
--len; /* always leave room for terminating '\0' byte */
for (p=buf; p < buf+len; ++p) {
c = getchar(); /* read character */
if (do_echo)
putchar(c);
switch (c) {
case '\r':
case '\n':
*p = '\0';
return p - buf;
case '\0':
case 0x03: /* ^C - Control C */
return -1;
default:
*p = c;
}
}
/* line too long - truncate */
*p = '\0';
return p - buf;
}
#ifdef CONFIG_CMD_SAVES
static int do_save_serial(int argc, char *argv[])
{
ulong offset = 0;
ulong size = 0;
if (argc >= 2) {
offset = simple_strtoul(argv[1], NULL, 16);
}
if (argc == 3) {
size = simple_strtoul(argv[2], NULL, 16);
}
printf ("## Ready for S-Record upload, press ENTER to proceed ...\n");
for (;;) {
if (getchar() == '\r')
break;
}
if (save_serial(offset, size)) {
printf("## S-Record upload aborted\n");
} else {
printf("## S-Record upload complete\n");
}
return 0;
}
#define SREC3_START "S0030000FC\n"
#define SREC3_FORMAT "S3%02X%08lX%s%02X\n"
#define SREC3_END "S70500000000FA\n"
#define SREC_BYTES_PER_RECORD 16
static int save_serial(ulong address, ulong count)
{
int i, c, reclen, checksum, length;
char *hex = "0123456789ABCDEF";
char record[2*SREC_BYTES_PER_RECORD+16]; /* buffer for one S-Record */
char data[2*SREC_BYTES_PER_RECORD+1]; /* buffer for hex data */
reclen = 0;
checksum = 0;
if (write_record(SREC3_START)) /* write the header */
return -1;
do {
if (count) { /* collect hex data in the buffer */
c = *(volatile uchar*)(address + reclen); /* get one byte */
checksum += c; /* accumulate checksum */
data[2*reclen] = hex[(c>>4)&0x0f];
data[2*reclen+1] = hex[c & 0x0f];
data[2*reclen+2] = '\0';
++reclen;
--count;
}
if (reclen == SREC_BYTES_PER_RECORD || count == 0) {
/* enough data collected for one record: dump it */
if (reclen) { /* build & write a data record: */
/* address + data + checksum */
length = 4 + reclen + 1;
/* accumulate length bytes into checksum */
for (i = 0; i < 2; i++)
checksum += (length >> (8*i)) & 0xff;
/* accumulate address bytes into checksum: */
for (i = 0; i < 4; i++)
checksum += (address >> (8*i)) & 0xff;
/* make proper checksum byte: */
checksum = ~checksum & 0xff;
/* output one record: */
sprintf(record, SREC3_FORMAT, length, address, data, checksum);
if (write_record(record))
return -1;
}
address += reclen; /* increment address */
checksum = 0;
reclen = 0;
}
} while (count);
if (write_record(SREC3_END)) /* write the final record */
return -1;
return 0;
}
static int write_record(char *buf)
{
char c;
while ((c = *buf++))
putchar(c);
/* Check for the console hangup (if any different from serial) */
if (ctrlc()) {
return -1;
}
return 0;
}
#endif /* CONFIG_CMD_SAVES */
BAREBOX_CMD_HELP_START(loads)
BAREBOX_CMD_HELP_TEXT("Load S-Record file over serial line with offset OFFS.")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(loads)
.cmd = do_load_serial,
BAREBOX_CMD_DESC("load binary file over serial line (S-Records)")
BAREBOX_CMD_OPTS("OFFS")
BAREBOX_CMD_GROUP(CMD_GRP_BOOT)
BAREBOX_CMD_HELP(cmd_loads_help)
BAREBOX_CMD_END
/*
* SAVES always requires LOADS support, but not vice versa
*/
#ifdef CONFIG_CMD_SAVES
BAREBOX_CMD_HELP_START(saves)
BAREBOX_CMD_HELP_TEXT("Save S-Record file to serial line with offset OFFS and length LEN.")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(saves)
.cmd = do_save_serial,
BAREBOX_CMD_DESC("save file over serial line (S-Records)")
BAREBOX_CMD_OPTS("OFFS LEN")
BAREBOX_CMD_GROUP(CMD_GRP_BOOT)
BAREBOX_CMD_HELP(cmd_saves_help)
BAREBOX_CMD_END
#endif /* CONFIG_CMD_SAVES */
