view helpers/srec4ram.c @ 660:293c7db5f10f

bmi3: fixed the mysterious "mute on first call" bug When UI-enabled fw boots on a previously blank (no /mmi/* files) FFS for the first time, the output_volume member of the persistent UI settings structure was left uninitialized, corresponding to the earpiece volume being set to mute, which is an invalid setting. Because of other quirks in the far-from-finished UI code, this volume setting takes effect only when the first call is answered, producing the odd behaviour seen at the user level. The current fix is to set the blank-FFS default for output_volume to volume level 4, which is the same -6 dB Iota volume as the ACI default.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 14 May 2020 02:50:41 +0000
parents 40b08f6cb2b8
children
line wrap: on
line source

/*
 * This ad hoc utility is used as part of building RAM-loadable
 * firmware images for targets with large RAM.  It reads the ramimage.m0
 * S-record file produced by TI's hex470 post-linker and re-emits it
 * in another SREC form that is suitable for feeding to fc-xram.
 */

#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

char *infname;
FILE *inf, *outf;
char srecbuf[80];
u_char srecbin[40], srecout[40];
int lineno;

decode_hex_byte(s)
	char *s;
{
	register int u, l;

	if (!isxdigit(s[0]) || !isxdigit(s[1]))
		return(-1);
	if (isdigit(s[0]))
		u = s[0] - '0';
	else if (isupper(s[0]))
		u = s[0] - 'A' + 10;
	else
		u = s[0] - 'a' + 10;
	if (isdigit(s[1]))
		l = s[1] - '0';
	else if (isupper(s[1]))
		l = s[1] - 'A' + 10;
	else
		l = s[1] - 'a' + 10;
	return((u << 4) | l);
}

srec2bin()
{
	register int i, l, b;

	l = decode_hex_byte(srecbuf + 2);
	if (l < 1) {
		fprintf(stderr, "%s line %d: S-record length octet is bad\n",
			infname, lineno);
		exit(1);
	}
	srecbin[0] = l;
	if (l > 35) {
		fprintf(stderr,
			"%s line %d: S-record is longer than expected\n",
			infname, lineno);
		exit(1);
	}
	for (i = 1; i <= l; i++) {
		b = decode_hex_byte(srecbuf + i*2 + 2);
		if (b < 0) {
			fprintf(stderr, "%s line %d: hex decode error\n",
				infname, lineno);
			exit(1);
		}
		srecbin[i] = b;
	}
	return(0);
}

srec_cksum()
{
	u_char accum;
	register int i, len;

	len = srecbin[0] + 1;
	accum = 0;
	for (i = 0; i < len; i++)
		accum += srecbin[i];
	if (accum != 0xFF) {
		fprintf(stderr, "%s line %d: bad checksum\n", infname, lineno);
		exit(1);
	}
	return(0);
}

emit_output_srec(type, buf)
	u_char *buf;
{
	int i;
	u_char accum = 0;

	putc('S', outf);
	putc(type, outf);
	for (i = 0; i < buf[0]; i++) {
		fprintf(outf, "%02X", buf[i]);
		accum += buf[i];
	}
	fprintf(outf, "%02X\n", ~accum & 0xFF);
	return 0;
}

transform_s3()
{
	int datalen;
	u_char *sp, *dp;
	int i;

	if (srecbin[0] < 6) {
		fprintf(stderr,
			"%s line %d: S3 record is too short\n",
			infname, lineno);
		exit(1);
	}
	datalen = srecbin[0] - 5;
	if (datalen & 1) {
		fprintf(stderr, "%s line %d: odd data length\n",
			infname, lineno);
		exit(1);
	}
	sp = srecbin;
	dp = srecout;
	for (i = 0; i < 5; i++)
		*dp++ = *sp++;
	for (i = 0; i < datalen; i += 2) {
		dp[0] = sp[1];
		dp[1] = sp[0];
		sp += 2;
		dp += 2;
	}
	return 0;
}

generate_vectors_record()
{
	u_char *dp;
	u_long addr;
	int i;

	srecout[0] = 28 + 5;
	srecout[1] = 0x00;
	srecout[2] = 0x80;
	srecout[3] = 0x00;
	srecout[4] = 0x00;
	dp = srecout + 5;
	for (i = 0; i < 7; i++) {
		addr = 0x01004000 + i * 4;
		*dp++ = addr;
		*dp++ = addr >> 8;
		*dp++ = addr >> 16;
		*dp++ = addr >> 24;
	}
	emit_output_srec('3', srecout);
	return 0;
}

generate_jump_record()
{
	srecout[0] = 5;
	srecout[1] = 0x01;
	srecout[2] = 0x00;
	srecout[3] = 0x40;
	srecout[4] = 0x58;
	emit_output_srec('7', srecout);
	return 0;
}

main(argc, argv)
	char **argv;
{
	if (argc < 2 || argc > 3) {
		fprintf(stderr, "usage: %s input.m0 [output.srec]\n", argv[0]);
		exit(1);
	}
	infname = argv[1];
	inf = fopen(infname, "r");
	if (!inf) {
		perror(infname);
		exit(1);
	}
	if (argc > 2) {
		outf = fopen(argv[2], "w");
		if (!outf) {
			perror(argv[2]);
			exit(1);
		}
	} else
		outf = stdout;
	for (lineno = 1; ; lineno++) {
		if (!fgets(srecbuf, sizeof srecbuf, inf)) {
			fprintf(stderr, "%s: premature EOF\n", infname);
			exit(1);
		}
		if (srecbuf[0] != 'S') {
			fprintf(stderr, "%s line %d: not an S-record\n",
				infname, lineno);
			exit(1);
		}
		srec2bin();
		srec_cksum();
		switch (srecbuf[1]) {
		case '0':
			emit_output_srec('0', srecbin);
			continue;
		case '3':
			transform_s3();
			emit_output_srec('3', srecout);
			continue;
		case '7':
			break;
		default:
			fprintf(stderr, "%s line %d: unexpected S%c record\n",
				infname, lineno, srecbuf[1]);
			exit(1);
		}
		break;
	}
	generate_vectors_record();
	generate_jump_record();
	exit(0);
}