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scp_dump.c
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scp_dump.c
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/*
* scp_dump.c
*
* Communicate with Supercard Pro hardware to create .scp images.
*
* Written in 2014 by Keir Fraser
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <libdisk/util.h>
#include <time.h>
#include "scp.h"
#if defined (__APPLE__)
/* FTDI VCP driver: http://www.ftdichip.com/Drivers/VCP.htm */
#define DEFAULT_SERDEVICE "/dev/cu.usbserial-SCP_JIM"
#else
#define DEFAULT_SERDEVICE "/dev/ttyUSB0"
#endif
#define DEFAULT_UNIT 0
#define DEFAULT_STARTTRK 0
#define DEFAULT_ENDTRK 163
#define DEFAULT_REVS 2
static int double_step = 0;
static struct scp_params scp_params;
#define log(_f, _a...) do { if (!quiet) printf(_f, ##_a); } while (0)
static void usage(int rc)
{
printf("Usage: scp_dump [options] out_file\n");
printf("Options:\n");
printf(" -h, --help Display this information\n");
printf(" -q, --quiet Quiesce normal informational output\n");
printf(" -d, --device Name of serial device (%s)\n",
DEFAULT_SERDEVICE);
printf(" -u, --unit={A,B} Which drive to dump (%c)\n",
DEFAULT_UNIT ? 'B' : 'A');
printf(" -r, --revs Nr revolutions per track (%d)\n",
DEFAULT_REVS);
printf(" -R, --ramtest Test SCP on-board SRAM before dumping\n");
printf(" -s, --start First track to dump (%d)\n",
DEFAULT_STARTTRK);
printf(" -e, --end Last track to dump (%d)\n",
DEFAULT_ENDTRK);
printf(" -D, --double-step Double-step heads "
"(40-cyl disk, 80-cyl drive)\n");
printf(" -k, --step-delay Delay between head steps, millisecs (%u)\n",
default_scp_params.step_delay_ms);
printf(" -K, --settle-delay Settle time after seek, millisecs (%u)\n",
default_scp_params.seek_settle_delay_ms);
exit(rc);
}
/* When double-stepping, default cylinder numbers are halved. */
static unsigned int default_tracknr(unsigned int tracknr)
{
unsigned int cyl = tracknr >> 1;
unsigned int hd = tracknr & 1;
if (double_step)
cyl /= 2;
return (cyl << 1) | hd;
}
static void checksum_and_write(
int fd, uint32_t *p_csum, const void *dat, size_t len)
{
uint32_t csum = *p_csum;
const uint8_t *p = dat;
write_exact(fd, dat, len);
while (len--)
csum += *p++;
*p_csum = csum;
}
int main(int argc, char **argv)
{
struct scp_handle *scp;
struct scp_flux flux;
struct disk_header dhdr;
struct track_header thdr;
int rev, nr_revs = DEFAULT_REVS;
int trk, start_trk = -1, end_trk = -1;
unsigned int sizeof_thdr, unit = DEFAULT_UNIT;
uint32_t *th_offs, file_off, dat_off, csum = 0;
int ch, fd, quiet = 0, ramtest = 0;
char *sername = DEFAULT_SERDEVICE;
struct footer ftr;
uint8_t hwinfo[2];
uint16_t app_name_len;
const static char app_name[] = "scp_dump (keirf)";
const static char sopts[] = "hqd:u:r:Rs:e:Dk:K:";
const static struct option lopts[] = {
{ "help", 0, NULL, 'h' },
{ "quiet", 0, NULL, 'q' },
{ "device", 1, NULL, 'd' },
{ "unit", 1, NULL, 'u' },
{ "revs", 1, NULL, 'r' },
{ "ramtest", 0, NULL, 'R' },
{ "start", 1, NULL, 's' },
{ "end", 1, NULL, 'e' },
{ "double-step", 0, NULL, 'D' },
{ "step-delay", 1, NULL, 'k' },
{ "settle-delay", 1, NULL, 'K' },
{ 0, 0, 0, 0 }
};
scp_params = default_scp_params;
while ((ch = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
switch (ch) {
case 'h':
usage(0);
break;
case 'q':
quiet = 1;
break;
case 'd':
sername = optarg;
break;
case 'u':
if (strlen(optarg) != 1)
goto bad;
switch (*optarg) {
case 'a': case 'A': unit = 0; break;
case 'b': case 'B': unit = 1; break;
default: bad:
warnx("Bad drive unit '%s'", optarg);
usage(1);
}
break;
case 'r':
nr_revs = atoi(optarg);
break;
case 'R':
ramtest = 1;
break;
case 's':
start_trk = atoi(optarg);
break;
case 'e':
end_trk = atoi(optarg);
break;
case 'D':
double_step = 1;
break;
case 'k':
scp_params.step_delay_ms = atoi(optarg);
break;
case 'K':
scp_params.seek_settle_delay_ms = atoi(optarg);
break;
default:
usage(1);
break;
}
}
if (start_trk < 0)
start_trk = default_tracknr(DEFAULT_STARTTRK);
if (end_trk < 0)
end_trk = default_tracknr(DEFAULT_ENDTRK);
if (argc != (optind + 1))
usage(1);
if ((end_trk >= SCP_MAX_TRACKS) || (start_trk > end_trk)) {
warnx("Bad track range (%u-%u)", start_trk, end_trk);
usage(1);
}
if (nr_revs > ARRAY_SIZE(flux.info)) {
warnx("Too many revolutions specified (%u, max %u)",
nr_revs, (unsigned int)ARRAY_SIZE(flux.info));
usage(1);
}
if ((fd = file_open(argv[optind], O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1)
err(1, "Error creating %s", argv[optind]);
memset(&dhdr, 0, sizeof(dhdr));
memcpy(dhdr.sig, "SCP", sizeof(dhdr.sig));
dhdr.disk_type = DISKTYPE_amiga;
dhdr.nr_revolutions = nr_revs;
dhdr.start_track = start_trk;
dhdr.end_track = end_trk;
dhdr.flags = (1u<<_FLAG_footer);
write_exact(fd, &dhdr, sizeof(dhdr));
th_offs = memalloc(SCP_MAX_TRACKS * sizeof(uint32_t));
write_exact(fd, th_offs, SCP_MAX_TRACKS * sizeof(uint32_t));
file_off = sizeof(dhdr) + SCP_MAX_TRACKS * sizeof(uint32_t);
scp = scp_open(sername);
if (!quiet)
scp_printinfo(scp);
if (ramtest)
scp_ramtest(scp);
scp_set_params(scp, &scp_params);
scp_selectdrive(scp, unit);
scp_getinfo(scp, &hwinfo);
log("Reading track %7s", "");
sizeof_thdr = 4 + 12*nr_revs;
for (trk = start_trk; trk <= end_trk; trk++) {
log("\b\b\b\b\b\b\b%-4u...", trk);
fflush(stdout);
scp_seek_track(scp, trk, double_step);
scp_read_flux(scp, nr_revs, &flux);
th_offs[trk] = htole32(file_off);
memset(&thdr, 0, sizeof_thdr);
memcpy(thdr.sig, "TRK", sizeof(thdr.sig));
thdr.tracknr = trk;
dat_off = sizeof_thdr;
for (rev = 0; rev < nr_revs; rev++) {
thdr.rev[rev].duration = htole32(flux.info[rev].index_time);
thdr.rev[rev].nr_samples = htole32(flux.info[rev].nr_bitcells);
thdr.rev[rev].offset = htole32(dat_off);
dat_off += flux.info[rev].nr_bitcells * sizeof(uint16_t);
}
checksum_and_write(fd, &csum, &thdr, sizeof_thdr);
checksum_and_write(fd, &csum, flux.flux, dat_off - sizeof_thdr);
file_off += dat_off;
}
log("\n");
scp_deselectdrive(scp, unit);
scp_close(scp);
memset(&ftr, 0, sizeof(ftr));
memcpy(ftr.sig, "FPCS", sizeof(ftr.sig));
ftr.application_offset = htole32(lseek(fd, 0, SEEK_CUR));
ftr.creation_time = ftr.modification_time = htole64(time(NULL));
ftr.application_version = 0x10; /* should be moved to a general include? */
ftr.format_revision = 0x16; /* last specification used, 1.6 */
ftr.hardware_version = hwinfo[0];
ftr.firmware_version = hwinfo[1];
app_name_len = htole16(strlen(app_name));
checksum_and_write(fd, &csum, &app_name_len, sizeof(app_name_len));
checksum_and_write(fd, &csum, app_name, sizeof(app_name));
checksum_and_write(fd, &csum, &ftr, sizeof(ftr));
lseek(fd, sizeof(dhdr), SEEK_SET);
checksum_and_write(fd, &csum, th_offs, SCP_MAX_TRACKS * sizeof(uint32_t));
dhdr.checksum = htole32(csum);
lseek(fd, 0, SEEK_SET);
write_exact(fd, &dhdr, sizeof(dhdr));
return 0;
}