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/*
* Copyright (c) 2005 Chris Kuethe <chris.kuethe@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "gpsflash.h"
char *progname;
int
main(int argc, char **argv){
int ch;
int lfd, ffd, pfd;
int ls, fs;
int fflag = 0, lflag = 0, pflag = 0;
struct stat sb;
char *fname = NULL;
char *lname = "dlgsp2.bin";
char *port = NULL;
char *warning;
struct termios *term;
sigset_t sigset;
char *firmware = NULL;
char *loader = NULL;
progname = argv[0];
while ((ch = getopt(argc, argv, "f:l:p:")) != -1)
switch (ch) {
case 'f':
fname = optarg;
fflag = 1;
break;
case 'l':
lname = optarg;
lflag = 1;
break;
case 'p':
port = optarg;
pflag = 1;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
/* nasty little trick to hopefully make people read the manual */
if ( ((warning = getenv("I_READ_THE_README")) == NULL) ||
(strcmp(warning, "why oh why didn't i take the blue pill") == 0 )){
fprintf(stderr, "RTFM, luser!\n");
unlink(progname);
exit(1);
}
/* make sure we have meaningful flags */
if (!(fflag && pflag))
usage();
/* Open the loader file */
if((lfd = open(lname, O_RDONLY, 0444)) == -1)
err(1, "open(%s)", lname);
/* fstat() its file descriptor. Need the size, and avoid races */
if(fstat(lfd, &sb) == -1)
err(1, "fstat(%s)", lname);
/* minimal sanity check on loader size. also prevents bad malloc() */
ls = (int)sb.st_size;
if ((ls < MIN_LD_SIZE) || (ls > MAX_LD_SIZE)){
fprintf(stderr, "preposterous loader size: %d\n", ls);
return 1;
}
/* malloc a loader buffer */
if ((loader = malloc(ls)) == NULL)
err(1, "malloc(%d)", ls);
if ((read(lfd, loader, ls)) != ls)
err(1, "read(%d)", ls);
/* don't care if close fails - kernel will force close on exit() */
close(lfd);
/* Open the firmware image file */
if((ffd = open(fname, O_RDONLY, 0444)) == -1)
err(1, "open(%s)", fname);
/* fstat() its file descriptor. Need the size, and avoid races */
if(fstat(ffd, &sb) == -1)
err(1, "fstat(%s)", fname);
/* minimal sanity check on firmware size. also prevents bad malloc() */
fs = (int)sb.st_size;
if ((fs < MIN_FW_SIZE) || (fs > MAX_FW_SIZE)){
fprintf(stderr, "preposterous firmware size: %d\n", fs);
return 1;
}
/* malloc an image buffer */
if ((firmware = malloc(fs+1)) == NULL)
err(1, "malloc(%d)", fs);
if ((read(ffd, firmware, fs)) != fs)
err(1, "read(%d)", fs);
firmware[fs] = '\0';
/* don't care if close fails - kernel will force close on exit() */
close(ffd);
/* did we just read some S-records? */
if (!((firmware[0] == 'S') && ((firmware[1] >= '0') && (firmware[1] <= '9')))){ /* srec? */
fprintf(stderr, "%s: not an S-record file\n", fname);
return(1);
}
/* malloc a loader buffer */
if ((term = malloc(sizeof(struct termios))) == NULL)
err(1, "malloc(%d)", sizeof(struct termios));
/* Open the serial port, blocking is OK */
if((pfd = open(port, O_RDWR | O_NOCTTY , 0600)) == -1)
err(1, "open(%s)", port);
/* the firware upload defaults to 38k4, so lets go there */
if(sirfSetProto(pfd, term, PROTO_SIRF, 38400) == -1)
err(1, "sirfSetProto()");
/* once we get here, we are uninterruptable. handle signals */
sigemptyset(&sigset);
sigaddset(&sigset, SIGINT);
sigaddset(&sigset, SIGHUP);
sigaddset(&sigset, SIGQUIT);
sigaddset(&sigset, SIGTSTP);
sigaddset(&sigset, SIGSTOP);
sigaddset(&sigset, SIGKILL);
if(sigprocmask(SIG_BLOCK, &sigset, NULL) == -1)
err(1,"sigprocmask");
/* send the magic update command */
if(sirfSendUpdateCmd(pfd) == -1)
err(1, "sirfSendUpdateCmd()");
/* wait a moment for the receiver to switch to boot rom */
sleep(2);
/* send the bootstrap/flash programmer */
if(sirfSendLoader(pfd, term, loader, ls) == -1)
err(1, "sirfSendLoader()");
/* again we wait, this time for our uploaded code to start running */
sleep(2);
/* and now, poke the actual firmware over */
if(sirfSendFirmware(pfd, firmware, fs) == -1)
err(1, "sirfSendFirmware()");
/* waitaminnit, and drop back to NMEA@4800 for luser apps */
sleep(5);
if(sirfSetProto(pfd, term, PROTO_NMEA, 4800) == -1)
err(1, "sirfSetProto()");
/* return() from main(), to take advantage of SSP compilers */
return 0;
}
void
usage(void){
fprintf(stderr, "Usage: %s [-v] [-l <loader_file>] -p <tty> -f <firmware_file>\n", progname);
fprintf(stderr, " loader_file defaults to \"dlgsp2.bin\"\n");
fprintf(stderr, "Receiver will be reset to 4800bps NMEA after flash\n");
exit(1);
}
/*
dlgsp2.bin looks for this header
unsigned char hdr[] = "S00600004844521B\r\n";
*/
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