diff options
Diffstat (limited to 'ice40/bitstream.cc')
| -rw-r--r-- | ice40/bitstream.cc | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/ice40/bitstream.cc b/ice40/bitstream.cc index c8ad93d8..6794ecca 100644 --- a/ice40/bitstream.cc +++ b/ice40/bitstream.cc @@ -423,6 +423,18 @@ void write_asc(const Context *ctx, std::ostream &out) // If this is a PAD PLL, and this is the 'PLLOUT_A' port, then the same SB_IO is also PAD if (port == id_PLLOUT_A && is_sb_pll40_pad(ctx, cell.second.get())) sb_io_used_by_pll_pad.insert(io_bel_loc); + + // Configure the SB_IO that the clock outputs are going through. + // note: PINTYPE[1:0] must be set property to passes the PLL through to the fabric. + // "01" if ICEGATE is disabed for that port and "11" if it's enabled + const TileInfoPOD &ti = bi.tiles_nonrouting[TILE_IO]; + bool icegate_ena = get_param_or_def( + ctx, cell.second.get(), (port == id_PLLOUT_A) ? id_ENABLE_ICEGATE_PORTA : id_ENABLE_ICEGATE_PORTB); + + set_config(ti, config.at(io_bel_loc.y).at(io_bel_loc.x), + "IOB_" + std::to_string(io_bel_loc.z) + ".PINTYPE_1", icegate_ena); + set_config(ti, config.at(io_bel_loc.y).at(io_bel_loc.x), + "IOB_" + std::to_string(io_bel_loc.z) + ".PINTYPE_0", true); } } @@ -724,6 +736,8 @@ void write_asc(const Context *ctx, std::ostream &out) {"DIVF", 7}, {"DIVQ", 3}, {"DIVR", 4}, + {"ENABLE_ICEGATE_PORTA", 1}, + {"ENABLE_ICEGATE_PORTB", 1}, {"FDA_FEEDBACK", 4}, {"FDA_RELATIVE", 4}, {"FEEDBACK_PATH", 3}, @@ -734,19 +748,6 @@ void write_asc(const Context *ctx, std::ostream &out) {"SHIFTREG_DIV_MODE", 2}, {"TEST_MODE", 1}}; configure_extra_cell(config, ctx, cell.second.get(), pll_params, false, std::string("PLL.")); - - // Configure the SB_IOs that the clock outputs are going through. - for (auto &io_bel_loc : sb_io_used_by_pll_out) { - // Write config. - const TileInfoPOD &ti = bi.tiles_nonrouting[TILE_IO]; - - // PINTYPE[1:0] == "01" passes the PLL through to the fabric. - set_config(ti, config.at(io_bel_loc.y).at(io_bel_loc.x), - "IOB_" + std::to_string(io_bel_loc.z) + ".PINTYPE_1", false); - set_config(ti, config.at(io_bel_loc.y).at(io_bel_loc.x), - "IOB_" + std::to_string(io_bel_loc.z) + ".PINTYPE_0", true); - } - } else { NPNR_ASSERT(false); } |