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Add LVDS support

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This commit is contained in:
Miodrag Milanovic 2024-12-20 19:53:29 +01:00
parent ab29eab513
commit 81a1f02dcc
4 changed files with 83 additions and 15 deletions
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4
himbaechel/uarch/gatemate/bitstream.cc
View File

@ -118,6 +118,10 @@ struct BitstreamBackend
case id_CC_TOBUF.index:
case id_CC_OBUF.index:
case id_CC_IOBUF.index:
case id_CC_LVDS_IBUF.index:
case id_CC_LVDS_TOBUF.index:
case id_CC_LVDS_OBUF.index:
case id_CC_LVDS_IOBUF.index:
for (auto &p : params) {
cc.tiles[loc].add_word(stringf("GPIO.%s", p.first.c_str(ctx)), p.second.as_bits());
}

2
himbaechel/uarch/gatemate/ccf.cc
View File

@ -77,7 +77,7 @@ struct GateMateCCFReader
log_error("Value '%s' can not be defined for default GPIO in line %d.\n", name.c_str(), lineno);
if (ctx->get_package_pin_bel(ctx->id(value)) == BelId())
log_error("Unknown location '%s' used in line %d.\n", value.c_str(), lineno);
props->emplace(ctx->id("PIN_NAME"), Property(value));
props->emplace(id_LOC, Property(value));
} else if (name == "SCHMITT_TRIGGER" || name == "PULLUP" || name == "PULLDOWN" || name == "KEEPER" ||
name == "FF_IBF" || name == "FF_OBF" || name == "LVDS_BOOST" || name == "LVDS_RTERM") {
if (value == "TRUE") {

4
himbaechel/uarch/gatemate/constids.inc
View File

@ -63,6 +63,7 @@ X(IO_N)
X(OUT3)
X(OUT4)
X(LOC)
X(PIN_NAME)
X(PIN_NAME_P)
X(PIN_NAME_N)
@ -84,7 +85,8 @@ X(OE_ENABLE)
X(OUT_SIGNAL)
X(INPUT_ENABLE)
X(OUT23_14_SEL)
X(LVDS_EN)
X(LVDS_IE)
X(INIT_L00)
X(INIT_L01)
X(INIT_L02)

86
himbaechel/uarch/gatemate/pack.cc
View File

@ -90,15 +90,22 @@ void GateMatePacker::pack_io()
for (auto &attrs : ci->attrs)
top_port.cell->attrs[attrs.first] = attrs.second;
for (auto &params : ci->params) {
if (top_port.cell->params.count(params.first)) {
if (top_port.cell->params[params.first] != params.second) {
IdString key = params.first;
if (top_port.cell->type.in(id_CC_LVDS_IBUF, id_CC_LVDS_OBUF, id_CC_LVDS_TOBUF, id_CC_LVDS_IOBUF)) {
if (top_port.port.in(id_I_P, id_O_P, id_IO_P))
key = id_PIN_NAME_P;
if (top_port.port.in(id_I_N, id_O_N, id_IO_N))
key = id_PIN_NAME_N;
}
if (top_port.cell->params.count(key)) {
if (top_port.cell->params[key] != params.second) {
std::string val = params.second.is_string ? params.second.as_string()
: std::to_string(params.second.as_int64());
log_warning("Overriding parameter '%s' with value '%s' for cell '%s'.\n",
params.first.c_str(ctx), val.c_str(), ctx->nameOf(top_port.cell));
log_warning("Overriding parameter '%s' with value '%s' for cell '%s'.\n", key.c_str(ctx),
val.c_str(), ctx->nameOf(top_port.cell));
}
}
top_port.cell->params[params.first] = params.second;
top_port.cell->params[key] = params.second;
}
// Make sure that top level net is set correctly
@ -112,19 +119,41 @@ void GateMatePacker::pack_io()
for (auto &cell : ctx->cells) {
CellInfo &ci = *cell.second;
if (!ci.type.in(id_CC_IBUF, id_CC_OBUF, id_CC_TOBUF, id_CC_IOBUF))
if (!ci.type.in(id_CC_IBUF, id_CC_OBUF, id_CC_TOBUF, id_CC_IOBUF, id_CC_LVDS_IBUF, id_CC_LVDS_OBUF,
id_CC_LVDS_TOBUF, id_CC_LVDS_IOBUF))
continue;
std::string loc = str_or_default(ci.params, id_PIN_NAME, "UNPLACED");
bool is_lvds = ci.type.in(id_CC_LVDS_IBUF, id_CC_LVDS_OBUF, id_CC_LVDS_TOBUF, id_CC_LVDS_IOBUF);
std::string loc = str_or_default(ci.params, is_lvds ? id_PIN_NAME_P : id_PIN_NAME, "UNPLACED");
if (ci.params.count(id_LOC)) {
std::string new_loc = str_or_default(ci.params, id_LOC, "UNPLACED");
if (loc != "UNPLACED" && loc != new_loc)
log_warning("Overriding location of cell '%s' from '%s' with '%s'\n", ctx->nameOf(&ci), loc.c_str(),
new_loc.c_str());
loc = new_loc;
}
if (loc == "UNPLACED")
log_warning("IO signal name '%s' is not defined in CCF file and will be auto-placed.\n", ctx->nameOf(&ci));
disconnect_if_gnd(&ci, id_T);
if (ci.type == id_CC_TOBUF && !ci.getPort(id_T))
ci.type = id_CC_OBUF;
if (ci.type == id_CC_LVDS_TOBUF && !ci.getPort(id_T))
ci.type = id_CC_LVDS_OBUF;
std::vector<IdString> keys;
for (auto &p : ci.params) {
if (p.first.in(id_PIN_NAME, id_V_IO)) {
if (p.first.in(id_PIN_NAME, id_PIN_NAME_P, id_PIN_NAME_N)) {
if (ctx->get_package_pin_bel(ctx->id(p.second.as_string())) == BelId())
log_error("Unknown %s '%s' for cell '%s'.\n", p.first.c_str(ctx), p.second.as_string().c_str(),
ci.name.c_str(ctx));
keys.push_back(p.first);
continue;
}
if (p.first.in(id_V_IO, id_LOC)) {
keys.push_back(p.first);
continue;
}
@ -136,6 +165,11 @@ void GateMatePacker::pack_io()
if (ci.type.in(id_CC_OBUF, id_CC_TOBUF, id_CC_IOBUF) &&
p.first.in(id_DRIVE, id_SLEW, id_DELAY_OBF, id_FF_OBF))
continue;
if (ci.type.in(id_CC_LVDS_IBUF, id_CC_LVDS_IOBUF) && p.first.in(id_LVDS_RTERM, id_DELAY_IBF, id_FF_IBF))
continue;
if (ci.type.in(id_CC_LVDS_OBUF, id_CC_LVDS_TOBUF, id_CC_LVDS_IOBUF) &&
p.first.in(id_LVDS_BOOST, id_DELAY_OBF, id_FF_OBF))
continue;
log_warning("Removing unsupported parameter '%s' for type '%s'.\n", p.first.c_str(ctx), ci.type.c_str(ctx));
keys.push_back(p.first);
}
@ -150,19 +184,37 @@ void GateMatePacker::pack_io()
else
log_error("Unknown value '%s' for SLEW parameter of '%s' cell.\n", val.c_str(), ci.name.c_str(ctx));
}
if (is_lvds) {
std::string p_pin = str_or_default(ci.params, id_PIN_NAME_P, "UNPLACED");
std::string n_pin = str_or_default(ci.params, id_PIN_NAME_N, "UNPLACED");
if (p_pin == "UNPLACED" || n_pin == "UNPLACED")
log_error("Both LVDS pins must be set to a valid locations.\n");
if (p_pin.substr(0, 6) != n_pin.substr(0, 6) || p_pin[7] != n_pin[7])
log_error("Both LVDS pads '%s' and '%s' do not match.\n", p_pin.c_str(), n_pin.c_str());
if (p_pin[6] != 'A')
log_error("Both LVDS positive pad must be from type A.\n");
if (n_pin[6] != 'B')
log_error("Both LVDS negative pad must be from type B.\n");
}
for (auto key : keys)
ci.params.erase(key);
if ((ci.params.count(id_KEEPER) + ci.params.count(id_PULLUP) + ci.params.count(id_PULLDOWN)) > 1)
log_error("PULLUP, PULLDOWN and KEEPER are mutually exclusive parameters.\n");
if (is_lvds)
ci.params[id_LVDS_EN] = Property(Property::State::S1);
// DELAY_IBF and DELAY_OBF must be set depending of type
// Also we need to enable input/output
if (ci.type.in(id_CC_IBUF, id_CC_IOBUF)) {
if (ci.type.in(id_CC_IBUF, id_CC_IOBUF, id_CC_LVDS_IBUF, id_CC_LVDS_IOBUF)) {
ci.params[id_DELAY_IBF] = Property(1 << int_or_default(ci.params, id_DELAY_IBF, 0), 16);
if (is_lvds)
ci.params[id_LVDS_IE] = Property(Property::State::S1);
else
ci.params[id_INPUT_ENABLE] = Property(Property::State::S1);
}
if (ci.type.in(id_CC_OBUF, id_CC_TOBUF, id_CC_IOBUF)) {
if (ci.type.in(id_CC_OBUF, id_CC_TOBUF, id_CC_IOBUF, id_CC_LVDS_OBUF, id_CC_LVDS_TOBUF, id_CC_LVDS_IOBUF)) {
ci.params[id_DELAY_OBF] = Property(1 << int_or_default(ci.params, id_DELAY_OBF, 0), 16);
ci.params[id_OE_ENABLE] = Property(Property::State::S1);
}
@ -173,7 +225,8 @@ void GateMatePacker::pack_io()
ci.params[id_DRIVE] = Property((val - 3) / 3, 2);
}
for (auto &p : ci.params) {
if (p.first.in(id_PULLUP, id_PULLDOWN, id_KEEPER, id_SCHMITT_TRIGGER, id_FF_OBF, id_FF_IBF)) {
if (p.first.in(id_PULLUP, id_PULLDOWN, id_KEEPER, id_SCHMITT_TRIGGER, id_FF_OBF, id_FF_IBF, id_LVDS_RTERM,
id_LVDS_BOOST)) {
int val = int_or_default(ci.params, p.first, 0);
if (val != 0 && val != 1)
log_error("Unsupported value '%d' for %s parameter of '%s' cell.\n", val, p.first.c_str(ctx),
@ -186,6 +239,12 @@ void GateMatePacker::pack_io()
ci.disconnectPort(id_IO);
ci.disconnectPort(id_I);
ci.disconnectPort(id_O);
ci.disconnectPort(id_IO_P);
ci.disconnectPort(id_IO_N);
ci.disconnectPort(id_I_P);
ci.disconnectPort(id_I_N);
ci.disconnectPort(id_O_P);
ci.disconnectPort(id_O_N);
// Remap ports to GPIO bel
ci.renamePort(id_A, id_DO);
@ -208,7 +267,10 @@ void GateMatePacker::pack_io()
log_error("Unable to constrain IO '%s', device does not have a pin named '%s'\n", ci.name.c_str(ctx),
loc.c_str());
log_info(" Constraining '%s' to pad '%s'\n", ci.name.c_str(ctx), loc.c_str());
if (!ctx->checkBelAvail(bel)) {
log_error("Can't place %s at %s because it's already taken by %s\n", ctx->nameOf(&ci),
ctx->nameOfBel(bel), ctx->nameOf(ctx->getBoundBelCell(bel)));
}
ctx->bindBel(bel, &ci, PlaceStrength::STRENGTH_FIXED);
}
}