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jtag/fpga: prog method tag + RTCK link setting (phase C)

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- fpga_target gains a prog method (proxy_spi/svf/none), set in the
  registry or inferred when omitted (proxy_bitstream -> proxy_spi;
  Microsemi/Lattice -> svf); shown by fpga_info/fpga_list and exposed via
  fpga_prog_method_name() for the future program dispatch
- generalise RTCK as a neutral JTAG_RTCK, mirrored to
  PROBE_FTDI_JTAG_ENABLE_RTCK at open (FTDI-only)
- reset abstraction deferred (no clean neutral form yet); the program
  dispatch command itself lands with the SVF player

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Foué
2026-05-24 11:53:02 +02:00
parent ac883237ac
commit 2a03cb1145
5 changed files with 74 additions and 5 deletions
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39
modules/fpga/fpga.c
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@@ -53,6 +53,29 @@ static fpga_family parse_family(const char *s)
return FPGA_FAMILY_UNKNOWN;
}
static fpga_prog_method parse_prog(const char *s)
{
if (!s) return FPGA_PROG_NONE;
if (!strcmp(s, "proxy_spi")) return FPGA_PROG_PROXY_SPI;
if (!strcmp(s, "svf")) return FPGA_PROG_SVF;
if (!strcmp(s, "none")) return FPGA_PROG_NONE;
fprintf(stderr, "fpga: unknown prog method '%s'\n", s);
return FPGA_PROG_NONE;
}
/* Guess the programming method when the entry doesn't state one. */
static fpga_prog_method infer_prog(const fpga_target *t)
{
if (t->proxy_bitstream) return FPGA_PROG_PROXY_SPI;
switch (t->family) {
case FPGA_FAMILY_MICROSEMI_IGLOO2:
case FPGA_FAMILY_MICROSEMI_SMARTFUSION2:
case FPGA_FAMILY_LATTICE_MACHXO2:
case FPGA_FAMILY_LATTICE_MACHXO3: return FPGA_PROG_SVF;
default: return FPGA_PROG_NONE;
}
}
static unsigned int parse_caveats(const char *s)
{
unsigned int flags = 0;
@@ -90,6 +113,7 @@ static void set_field(fpga_target *t, const char *key, const char *val)
else if (!strcmp(key, "proxy_bitstream")) { free((void *)t->proxy_bitstream); t->proxy_bitstream = xstrdup(val); }
else if (!strcmp(key, "caveats")) t->caveats = parse_caveats(val);
else if (!strcmp(key, "max_tck_khz")) t->max_tck_khz = (int)strtol(val, NULL, 0);
else if (!strcmp(key, "prog")) t->prog = parse_prog(val);
else fprintf(stderr, "fpga: unknown key '%s'\n", key);
}
@@ -102,7 +126,10 @@ static int commit_entry(const fpga_target *cur)
return -1;
}
g_registry = tmp;
g_registry[g_count++] = *cur;
g_registry[g_count] = *cur;
if (g_registry[g_count].prog == FPGA_PROG_NONE)
g_registry[g_count].prog = infer_prog(&g_registry[g_count]);
g_count++;
return 0;
}
@@ -267,6 +294,16 @@ const char *fpga_family_name(fpga_family f)
}
}
const char *fpga_prog_method_name(fpga_prog_method m)
{
switch (m) {
case FPGA_PROG_PROXY_SPI: return "proxy_spi";
case FPGA_PROG_SVF: return "svf";
case FPGA_PROG_NONE:
default: return "none";
}
}
const char *fpga_registry_source(void)
{
ensure_loaded();