From 69cfa8e2e5e8df83996020c8699519accb09b07e Mon Sep 17 00:00:00 2001 From: Harry Ho Date: Wed, 16 Dec 2020 13:34:43 +0800 Subject: [PATCH] jesd204_tools: use new syntax from jesd204b core * requires jesd204b changes as in https://github.com/HarryMakes/jesd204b/tree/gth --- artiq/gateware/jesd204_tools.py | 102 +++++++++++++++++++++++++++----- 1 file changed, 88 insertions(+), 14 deletions(-) diff --git a/artiq/gateware/jesd204_tools.py b/artiq/gateware/jesd204_tools.py index 27a1ce6cc..d05d6432f 100644 --- a/artiq/gateware/jesd204_tools.py +++ b/artiq/gateware/jesd204_tools.py @@ -8,14 +8,19 @@ from misoc.interconnect.csr import * from jesd204b.common import (JESD204BTransportSettings, JESD204BPhysicalSettings, JESD204BSettings) -from jesd204b.phy.gth import GTHChannelPLL as JESD204BGTHChannelPLL +from jesd204b.phy.gth import (GTHChannelPLL as JESD204BGTHChannelPLL, + GTHQuadPLL as JESD204BGTHQuadPLL, + GTHTransmitter as JESD204BGTHTransmitter, + GTHInit as JESD204BGTHInit, + GTHTransmitterInterconnect as JESD204BGTHTransmitterInterconnect) from jesd204b.phy import JESD204BPhyTX from jesd204b.core import JESD204BCoreTX from jesd204b.core import JESD204BCoreTXControl class UltrascaleCRG(Module, AutoCSR): - linerate = int(6e9) + linerate = int(6e9) # linerate = 20*data_rate*4/8 = data_rate*10 + # data_rate = dac_rate/interp_factor refclk_freq = int(150e6) fabric_freq = int(125e6) @@ -45,27 +50,96 @@ PhyPads = namedtuple("PhyPads", "txp txn") class UltrascaleTX(Module, AutoCSR): - def __init__(self, platform, sys_crg, jesd_crg, dac): + def __init__(self, platform, sys_crg, jesd_crg, dac, pll_type="cpll", tx_half=False): + # Note: In general, the choice between channel and quad PLLs can be made based on the "nominal operating ranges", which are (see UG576, Ch.2): + # CPLL: 2.0 - 6.25 GHz + # QPLL0: 9.8 - 16.375 GHz + # QPLL1: 8.0 - 13.0 GHz + # However, the exact frequency and/or linerate range should be checked according to the model and speed grade from their corresponding datasheets. + pll_cls = { + "cpll": JESD204BGTHChannelPLL, + "qpll": JESD204BGTHQuadPLL + }[pll_type] ps = JESD204BPhysicalSettings(l=8, m=4, n=16, np=16) ts = JESD204BTransportSettings(f=2, s=2, k=16, cs=0) settings = JESD204BSettings(ps, ts, did=0x5a, bid=0x5) jesd_pads = platform.request("dac_jesd", dac) + plls = [] phys = [] for i in range(len(jesd_pads.txp)): - cpll = JESD204BGTHChannelPLL( - jesd_crg.refclk, jesd_crg.refclk_freq, jesd_crg.linerate) - self.submodules += cpll + pll = pll_cls( + jesd_crg.refclk, jesd_crg.refclk_freq, jesd_crg.linerate) + self.submodules += pll + plls.append(pll) + # QPLL quads + if pll_type == "qpll": + gthe3_common_cfgs = [] + for i in range(0, len(plls), 4): + # GTHE3_COMMON common signals + qpll_clk = Signal() + qpll_refclk = Signal() + qpll_reset = Signal() + qpll_lock = Signal() + # GTHE3_COMMON + self.specials += pll_cls.get_gthe3_common( + jesd_crg.refclk, jesd_crg.refclk_freq, jesd_crg.linerate, + qpll_clk, qpll_refclk, qpll_reset, qpll_lock) + gthe3_common_cfgs.append({ + "clk": qpll_clk, + "refclk": qpll_refclk, + "reset": qpll_reset, + "lock": qpll_lock + }) + # Per-channel PLL phys + for i, pll in enumerate(plls): + # PhyTX phy = JESD204BPhyTX( - cpll, PhyPads(jesd_pads.txp[i], jesd_pads.txn[i]), - jesd_crg.fabric_freq, transceiver="gth") - platform.add_period_constraint(phy.transmitter.cd_tx.clk, - 40*1e9/jesd_crg.linerate) - platform.add_false_path_constraints( - sys_crg.cd_sys.clk, - jesd_crg.cd_jesd.clk, - phy.transmitter.cd_tx.clk) + pll, jesd_crg.refclk, PhyPads(jesd_pads.txp[i], jesd_pads.txn[i]), + jesd_crg.fabric_freq, transceiver="gth", tx_half=tx_half) phys.append(phy) + if tx_half: + platform.add_period_constraint(phy.transmitter.cd_tx_half.clk, + 80*1e9/jesd_crg.linerate) + platform.add_false_path_constraints( + sys_crg.cd_sys.clk, + jesd_crg.cd_jesd.clk, + phy.transmitter.cd_tx_half.clk) + else: + platform.add_period_constraint(phy.transmitter.cd_tx.clk, + 40*1e9/jesd_crg.linerate) + platform.add_false_path_constraints( + sys_crg.cd_sys.clk, + jesd_crg.cd_jesd.clk, + phy.transmitter.cd_tx.clk) + # CHANNEL & init interconnects + for i, (pll, phy) in enumerate(zip(plls, phys)): + # CPLLs: 1 init per channel + if pll_type == "cpll": + phy_channel_cfg = {} + # Connect reset/lock to init + pll_reset = pll.reset + pll_lock = pll.lock + self.submodules += JESD204BGTHTransmitterInterconnect( + pll_reset, pll_lock, phy.transmitter, phy.transmitter.init) + # QPLL: 4 inits and 4 channels per quad + elif pll_type == "qpll": + # Connect clk/refclk to CHANNEL + phy_cfg = gthe3_common_cfgs[int(i//4)] + phy_channel_cfg = { + "qpll_clk": phy_cfg["clk"], + "qpll_refclk": phy_cfg["refclk"] + } + # Connect reset/lock to init + pll_reset = phy_cfg["reset"] + pll_lock = phy_cfg["lock"] + if i % 4 == 0: + self.submodules += JESD204BGTHTransmitterInterconnect( + pll_reset, pll_lock, phy.transmitter, + [phys[j].transmitter.init for j in range(i, min(len(phys), i+4))]) + # GTHE3_CHANNEL + self.specials += JESD204BGTHTransmitter.get_gthe3_channel( + pll, phy.transmitter, **phy_channel_cfg) self.submodules.core = JESD204BCoreTX( phys, settings, converter_data_width=64)