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Artix 7 2500BASE-X

This commit is contained in:
Sergey Razumov 2023-08-31 11:00:01 +03:00
parent 23035e7c63
commit 9a904fb8dc
1 changed files with 780 additions and 0 deletions
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liteeth/phy/a7_2500basex.py Normal file
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#
# This file is part of MiSoC and has been adapted/modified for LiteEth.
#
# Copyright (c) 2018 Sebastien Bourdeauducq <sb@m-labs.hk>
# Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.genlib.cdc import PulseSynchronizer
from litex.gen import *
from litex.soc.cores.clock import S7MMCM
from liteeth.common import *
from liteeth.phy.a7_gtp import *
from liteeth.phy.pcs_1000basex import *
# A7_2500BASEX PHY ---------------------------------------------------------------------------------
class A7_2500BASEX(LiteXModule):
dw = 8
tx_clk_freq = 312.5e6
rx_clk_freq = 312.5e6
def __init__(self, qpll_channel, data_pads, sys_clk_freq, with_csr=True, rx_polarity=0, tx_polarity=0):
pcs = PCS(lsb_first=True)
self.submodules += pcs
self.sink = pcs.sink
self.source = pcs.source
self.link_up = pcs.link_up
self.cd_eth_tx = ClockDomain()
self.cd_eth_rx = ClockDomain()
self.cd_eth_tx_half = ClockDomain(reset_less=True)
self.cd_eth_rx_half = ClockDomain(reset_less=True)
# for specifying clock constraints. 62.5MHz clocks.
self.txoutclk = Signal()
self.rxoutclk = Signal()
self.reset = Signal()
if with_csr:
self.add_csr()
# # #
# GTP transceiver
tx_reset = Signal()
tx_mmcm_locked = Signal()
tx_mmcm_reset = Signal(reset=1)
tx_data = Signal(20)
tx_reset_done = Signal()
rx_reset = Signal()
rx_mmcm_locked = Signal()
rx_mmcm_reset = Signal(reset=1)
rx_data = Signal(20)
rx_reset_done = Signal()
rx_pma_reset_done = Signal()
drpaddr = Signal(9)
drpen = Signal()
drpdi = Signal(16)
drprdy = Signal()
drpdo = Signal(16)
drpwe = Signal()
# Work around Python's 255 argument limitation.
gtp_params = dict(
# Simulation-Only Attributes
p_SIM_RECEIVER_DETECT_PASS = "TRUE",
p_SIM_TX_EIDLE_DRIVE_LEVEL = "X",
p_SIM_RESET_SPEEDUP = "FALSE",
p_SIM_VERSION = "2.0",
# RX Byte and Word Alignment Attributes
p_ALIGN_COMMA_DOUBLE = "FALSE",
p_ALIGN_COMMA_ENABLE = 0b1111111111,
p_ALIGN_COMMA_WORD = 1,
p_ALIGN_MCOMMA_DET = "TRUE",
p_ALIGN_MCOMMA_VALUE = 0b1010000011,
p_ALIGN_PCOMMA_DET = "TRUE",
p_ALIGN_PCOMMA_VALUE = 0b0101111100,
p_SHOW_REALIGN_COMMA = "TRUE",
p_RXSLIDE_AUTO_WAIT = 7,
p_RXSLIDE_MODE = "OFF",
p_RX_SIG_VALID_DLY = 10,
# RX 8B/10B Decoder Attributes
p_RX_DISPERR_SEQ_MATCH = "FALSE",
p_DEC_MCOMMA_DETECT = "FALSE",
p_DEC_PCOMMA_DETECT = "FALSE",
p_DEC_VALID_COMMA_ONLY = "FALSE",
# RX Clock Correction Attributes
p_CBCC_DATA_SOURCE_SEL = "ENCODED",
p_CLK_COR_SEQ_2_USE = "FALSE",
p_CLK_COR_KEEP_IDLE = "FALSE",
p_CLK_COR_MAX_LAT = 9,
p_CLK_COR_MIN_LAT = 7,
p_CLK_COR_PRECEDENCE = "TRUE",
p_CLK_COR_REPEAT_WAIT = 0,
p_CLK_COR_SEQ_LEN = 1,
p_CLK_COR_SEQ_1_ENABLE = 0b1111,
p_CLK_COR_SEQ_1_1 = 0b0100000000,
p_CLK_COR_SEQ_1_2 = 0b0000000000,
p_CLK_COR_SEQ_1_3 = 0b0000000000,
p_CLK_COR_SEQ_1_4 = 0b0000000000,
p_CLK_CORRECT_USE = "FALSE",
p_CLK_COR_SEQ_2_ENABLE = 0b1111,
p_CLK_COR_SEQ_2_1 = 0b0100000000,
p_CLK_COR_SEQ_2_2 = 0b0000000000,
p_CLK_COR_SEQ_2_3 = 0b0000000000,
p_CLK_COR_SEQ_2_4 = 0b0000000000,
# RX Channel Bonding Attributes
p_CHAN_BOND_KEEP_ALIGN = "FALSE",
p_CHAN_BOND_MAX_SKEW = 1,
p_CHAN_BOND_SEQ_LEN = 1,
p_CHAN_BOND_SEQ_1_1 = 0b0000000000,
p_CHAN_BOND_SEQ_1_2 = 0b0000000000,
p_CHAN_BOND_SEQ_1_3 = 0b0000000000,
p_CHAN_BOND_SEQ_1_4 = 0b0000000000,
p_CHAN_BOND_SEQ_1_ENABLE = 0b1111,
p_CHAN_BOND_SEQ_2_1 = 0b0000000000,
p_CHAN_BOND_SEQ_2_2 = 0b0000000000,
p_CHAN_BOND_SEQ_2_3 = 0b0000000000,
p_CHAN_BOND_SEQ_2_4 = 0b0000000000,
p_CHAN_BOND_SEQ_2_ENABLE = 0b1111,
p_CHAN_BOND_SEQ_2_USE = "FALSE",
p_FTS_DESKEW_SEQ_ENABLE = 0b1111,
p_FTS_LANE_DESKEW_CFG = 0b1111,
p_FTS_LANE_DESKEW_EN = "FALSE",
# RX Margin Analysis Attributes
p_ES_CONTROL = 0b000000,
p_ES_ERRDET_EN = "FALSE",
p_ES_EYE_SCAN_EN = "FALSE",
p_ES_HORZ_OFFSET = 0x010,
p_ES_PMA_CFG = 0b0000000000,
p_ES_PRESCALE = 0b00000,
p_ES_QUALIFIER = 0x00000000000000000000,
p_ES_QUAL_MASK = 0x00000000000000000000,
p_ES_SDATA_MASK = 0x00000000000000000000,
p_ES_VERT_OFFSET = 0b000000000,
# FPGA RX Interface Attributes
p_RX_DATA_WIDTH = 20,
# PMA Attributes
p_OUTREFCLK_SEL_INV = 0b11,
p_PMA_RSV = 0x00000333,
p_PMA_RSV2 = 0x00002040,
p_PMA_RSV3 = 0b00,
p_PMA_RSV4 = 0b0000,
p_RX_BIAS_CFG = 0b0000111100110011,
p_DMONITOR_CFG = 0x000A00,
p_RX_CM_SEL = 0b01,
p_RX_CM_TRIM = 0b0000,
p_RX_DEBUG_CFG = 0b00000000000000,
p_RX_OS_CFG = 0b0000010000000,
p_TERM_RCAL_CFG = 0b100001000010000,
p_TERM_RCAL_OVRD = 0b000,
p_TST_RSV = 0x00000000,
p_RX_CLK25_DIV = 5,
p_TX_CLK25_DIV = 5,
p_UCODEER_CLR = 0b0,
# PCI Express Attributes
p_PCS_PCIE_EN = "FALSE",
# PCS Attributes
p_PCS_RSVD_ATTR = 0x000000000000,
# RX Buffer Attributes
p_RXBUF_ADDR_MODE = "FAST",
p_RXBUF_EIDLE_HI_CNT = 0b1000,
p_RXBUF_EIDLE_LO_CNT = 0b0000,
p_RXBUF_EN = "TRUE",
p_RX_BUFFER_CFG = 0b000000,
p_RXBUF_RESET_ON_CB_CHANGE = "TRUE",
p_RXBUF_RESET_ON_COMMAALIGN = "FALSE",
p_RXBUF_RESET_ON_EIDLE = "FALSE",
p_RXBUF_RESET_ON_RATE_CHANGE = "TRUE",
p_RXBUFRESET_TIME = 0b00001,
p_RXBUF_THRESH_OVFLW = 61,
p_RXBUF_THRESH_OVRD = "FALSE",
p_RXBUF_THRESH_UNDFLW = 4,
p_RXDLY_CFG = 0x001F,
p_RXDLY_LCFG = 0x030,
p_RXDLY_TAP_CFG = 0x0000,
p_RXPH_CFG = 0xC00002,
p_RXPHDLY_CFG = 0x084020,
p_RXPH_MONITOR_SEL = 0b00000,
p_RX_XCLK_SEL = "RXREC",
p_RX_DDI_SEL = 0b000000,
p_RX_DEFER_RESET_BUF_EN = "TRUE",
# CDR Attributes
p_RXCDR_CFG = 0x0000107FE206001041010,
p_RXCDR_FR_RESET_ON_EIDLE = 0b0,
p_RXCDR_HOLD_DURING_EIDLE = 0b0,
p_RXCDR_PH_RESET_ON_EIDLE = 0b0,
p_RXCDR_LOCK_CFG = 0b001001,
# RX Initialization and Reset Attributes
p_RXCDRFREQRESET_TIME = 0b00001,
p_RXCDRPHRESET_TIME = 0b00001,
p_RXISCANRESET_TIME = 0b00001,
p_RXPCSRESET_TIME = 0b00001,
p_RXPMARESET_TIME = 0b00011,
# RX OOB Signaling Attributes
p_RXOOB_CFG = 0b0000110,
# RX Gearbox Attributes
p_RXGEARBOX_EN = "FALSE",
p_GEARBOX_MODE = 0b000,
# PRBS Detection Attribute
p_RXPRBS_ERR_LOOPBACK = 0b0,
# Power-Down Attributes
p_PD_TRANS_TIME_FROM_P2 = 0x03c,
p_PD_TRANS_TIME_NONE_P2 = 0x3c,
p_PD_TRANS_TIME_TO_P2 = 0x64,
# RX OOB Signaling Attributes
p_SAS_MAX_COM = 64,
p_SAS_MIN_COM = 36,
p_SATA_BURST_SEQ_LEN = 0b0101,
p_SATA_BURST_VAL = 0b100,
p_SATA_EIDLE_VAL = 0b100,
p_SATA_MAX_BURST = 8,
p_SATA_MAX_INIT = 21,
p_SATA_MAX_WAKE = 7,
p_SATA_MIN_BURST = 4,
p_SATA_MIN_INIT = 12,
p_SATA_MIN_WAKE = 4,
# RX Fabric Clock Output Control Attributes
p_TRANS_TIME_RATE = 0x0E,
# TX Buffer Attributes
p_TXBUF_EN = "TRUE",
p_TXBUF_RESET_ON_RATE_CHANGE = "TRUE",
p_TXDLY_CFG = 0x001F,
p_TXDLY_LCFG = 0x030,
p_TXDLY_TAP_CFG = 0x0000,
p_TXPH_CFG = 0x0780,
p_TXPHDLY_CFG = 0x084020,
p_TXPH_MONITOR_SEL = 0b00000,
p_TX_XCLK_SEL = "TXOUT",
# FPGA TX Interface Attributes
p_TX_DATA_WIDTH = 20,
# TX Configurable Driver Attributes
p_TX_DEEMPH0 = 0b000000,
p_TX_DEEMPH1 = 0b000000,
p_TX_EIDLE_ASSERT_DELAY = 0b110,
p_TX_EIDLE_DEASSERT_DELAY = 0b100,
p_TX_LOOPBACK_DRIVE_HIZ = "FALSE",
p_TX_MAINCURSOR_SEL = 0b0,
p_TX_DRIVE_MODE = "DIRECT",
p_TX_MARGIN_FULL_0 = 0b1001110,
p_TX_MARGIN_FULL_1 = 0b1001001,
p_TX_MARGIN_FULL_2 = 0b1000101,
p_TX_MARGIN_FULL_3 = 0b1000010,
p_TX_MARGIN_FULL_4 = 0b1000000,
p_TX_MARGIN_LOW_0 = 0b1000110,
p_TX_MARGIN_LOW_1 = 0b1000100,
p_TX_MARGIN_LOW_2 = 0b1000010,
p_TX_MARGIN_LOW_3 = 0b1000000,
p_TX_MARGIN_LOW_4 = 0b1000000,
# TX Gearbox Attributes
p_TXGEARBOX_EN = "FALSE",
# TX Initialization and Reset Attributes
p_TXPCSRESET_TIME = 0b00001,
p_TXPMARESET_TIME = 0b00001,
# TX Receiver Detection Attributes
p_TX_RXDETECT_CFG = 0x1832,
p_TX_RXDETECT_REF = 0b100,
# JTAG Attributes
p_ACJTAG_DEBUG_MODE = 0b0,
p_ACJTAG_MODE = 0b0,
p_ACJTAG_RESET = 0b0,
# CDR Attributes
p_CFOK_CFG = 0x49000040E80,
p_CFOK_CFG2 = 0b0100000,
p_CFOK_CFG3 = 0b0100000,
p_CFOK_CFG4 = 0b0,
p_CFOK_CFG5 = 0x0,
p_CFOK_CFG6 = 0b0000,
p_RXOSCALRESET_TIME = 0b00011,
p_RXOSCALRESET_TIMEOUT = 0b00000,
# PMA Attributes
p_CLK_COMMON_SWING = 0b0,
p_RX_CLKMUX_EN = 0b1,
p_TX_CLKMUX_EN = 0b1,
p_ES_CLK_PHASE_SEL = 0b0,
p_USE_PCS_CLK_PHASE_SEL = 0b0,
p_PMA_RSV6 = 0b0,
p_PMA_RSV7 = 0b0,
# TX Configuration Driver Attributes
p_TX_PREDRIVER_MODE = 0b0,
p_PMA_RSV5 = 0b0,
p_SATA_PLL_CFG = "VCO_3000MHZ",
# RX Fabric Clock Output Control Attributes
p_RXOUT_DIV = 2,
# TX Fabric Clock Output Control Attributes
p_TXOUT_DIV = 2,
# RX Phase Interpolator Attributes
p_RXPI_CFG0 = 0b000,
p_RXPI_CFG1 = 0b1,
p_RXPI_CFG2 = 0b1,
# RX Equalizer Attributes
p_ADAPT_CFG0 = 0x00000,
p_RXLPMRESET_TIME = 0b0001111,
p_RXLPM_BIAS_STARTUP_DISABLE = 0b0,
p_RXLPM_CFG = 0b0110,
p_RXLPM_CFG1 = 0b0,
p_RXLPM_CM_CFG = 0b0,
p_RXLPM_GC_CFG = 0b111100010,
p_RXLPM_GC_CFG2 = 0b001,
p_RXLPM_HF_CFG = 0b00001111110000,
p_RXLPM_HF_CFG2 = 0b01010,
p_RXLPM_HF_CFG3 = 0b0000,
p_RXLPM_HOLD_DURING_EIDLE = 0b0,
p_RXLPM_INCM_CFG = 0b0,
p_RXLPM_IPCM_CFG = 0b1,
p_RXLPM_LF_CFG = 0b000000001111110000,
p_RXLPM_LF_CFG2 = 0b01010,
p_RXLPM_OSINT_CFG = 0b100,
# TX Phase Interpolator PPM Controller Attributes
p_TXPI_CFG0 = 0b00,
p_TXPI_CFG1 = 0b00,
p_TXPI_CFG2 = 0b00,
p_TXPI_CFG3 = 0b0,
p_TXPI_CFG4 = 0b0,
p_TXPI_CFG5 = 0b000,
p_TXPI_GREY_SEL = 0b0,
p_TXPI_INVSTROBE_SEL = 0b0,
p_TXPI_PPMCLK_SEL = "TXUSRCLK2",
p_TXPI_PPM_CFG = 0x00,
p_TXPI_SYNFREQ_PPM = 0b001,
# LOOPBACK Attributes
p_LOOPBACK_CFG = 0b0,
p_PMA_LOOPBACK_CFG = 0b0,
# RX OOB Signalling Attributes
p_RXOOB_CLK_CFG = "PMA",
# TX OOB Signalling Attributes
p_TXOOB_CFG = 0b0,
# RX Buffer Attributes
p_RXSYNC_MULTILANE = 0b0,
p_RXSYNC_OVRD = 0b0,
p_RXSYNC_SKIP_DA = 0b0,
# TX Buffer Attributes
p_TXSYNC_MULTILANE = 0b0,
p_TXSYNC_OVRD = 0b0,
p_TXSYNC_SKIP_DA = 0b0
)
gtp_params.update(
# CPLL Ports
i_GTRSVD = 0b0000000000000000,
i_PCSRSVDIN = 0b0000000000000000,
i_TSTIN = 0b11111111111111111111,
# Channel - DRP Ports
i_DRPADDR = drpaddr,
i_DRPCLK = ClockSignal(),
i_DRPDI = drpdi,
o_DRPDO = drpdo,
i_DRPEN = drpen,
o_DRPRDY = drprdy,
i_DRPWE = drpwe,
# FPGA TX Interface Datapath Configuration
i_TX8B10BEN = 0,
# Loopback Ports
i_LOOPBACK = 0,
# PCI Express Ports
o_PHYSTATUS = Open(),
i_RXRATE = 0,
o_RXVALID = Open(),
# PMA Reserved Ports
i_PMARSVDIN3 = 0b0,
i_PMARSVDIN4 = 0b0,
# Power-Down Ports
i_RXPD = 0b00,
i_TXPD = 0b00,
# RX 8B/10B Decoder Ports
i_SETERRSTATUS = 0,
# RX Initialization and Reset Ports
i_EYESCANRESET = 0,
i_RXUSERRDY = rx_mmcm_locked,
# RX Margin Analysis Ports
o_EYESCANDATAERROR = Open(),
i_EYESCANMODE = 0,
i_EYESCANTRIGGER = 0,
# Receive Ports
i_CLKRSVD0 = 0,
i_CLKRSVD1 = 0,
i_DMONFIFORESET = 0,
i_DMONITORCLK = 0,
o_RXPMARESETDONE = rx_pma_reset_done,
i_SIGVALIDCLK = 0,
# Receive Ports - CDR Ports
i_RXCDRFREQRESET = 0,
i_RXCDRHOLD = 0,
o_RXCDRLOCK = Open(),
i_RXCDROVRDEN = 0,
i_RXCDRRESET = 0,
i_RXCDRRESETRSV = 0,
i_RXOSCALRESET = 0,
i_RXOSINTCFG = 0b0010,
o_RXOSINTDONE = Open(),
i_RXOSINTHOLD = 0,
i_RXOSINTOVRDEN = 0,
i_RXOSINTPD = 0,
o_RXOSINTSTARTED = Open(),
i_RXOSINTSTROBE = 0,
o_RXOSINTSTROBESTARTED = Open(),
i_RXOSINTTESTOVRDEN = 0,
# Receive Ports - Clock Correction Ports
o_RXCLKCORCNT = Open(),
# Receive Ports - FPGA RX Interface Datapath Configuration
i_RX8B10BEN = 0,
# Receive Ports - FPGA RX Interface Ports
o_RXDATA = Cat(rx_data[:8], rx_data[10:18]),
i_RXUSRCLK = ClockSignal("eth_rx_half"),
i_RXUSRCLK2 = ClockSignal("eth_rx_half"),
# Receive Ports - Pattern Checker Ports
o_RXPRBSERR = Open(),
i_RXPRBSSEL = 0,
# Receive Ports - Pattern Checker ports
i_RXPRBSCNTRESET = 0,
# Receive Ports - RX 8B/10B Decoder Ports
o_RXCHARISCOMMA = Open(),
o_RXCHARISK = Cat(rx_data[8], rx_data[18]),
o_RXDISPERR = Cat(rx_data[9], rx_data[19]),
o_RXNOTINTABLE = Open(),
# Receive Ports - RX AFE Ports
i_GTPRXN = data_pads.rxn,
i_GTPRXP = data_pads.rxp,
i_PMARSVDIN2 = 0b0,
o_PMARSVDOUT0 = Open(),
o_PMARSVDOUT1 = Open(),
# Receive Ports - RX Buffer Bypass Ports
i_RXBUFRESET = 0,
o_RXBUFSTATUS = Open(),
i_RXDDIEN = 0,
i_RXDLYBYPASS = 1,
i_RXDLYEN = 0,
i_RXDLYOVRDEN = 0,
i_RXDLYSRESET = 0,
o_RXDLYSRESETDONE = Open(),
i_RXPHALIGN = 0,
o_RXPHALIGNDONE = Open(),
i_RXPHALIGNEN = 0,
i_RXPHDLYPD = 0,
i_RXPHDLYRESET = 0,
o_RXPHMONITOR = Open(),
i_RXPHOVRDEN = 0,
o_RXPHSLIPMONITOR = Open(),
o_RXSTATUS = Open(),
i_RXSYNCALLIN = 0,
o_RXSYNCDONE = Open(),
i_RXSYNCIN = 0,
i_RXSYNCMODE = 0,
o_RXSYNCOUT = Open(),
# Receive Ports - RX Byte and Word Alignment Ports
o_RXBYTEISALIGNED = Open(),
o_RXBYTEREALIGN = Open(),
o_RXCOMMADET = Open(),
i_RXCOMMADETEN = 0,
i_RXMCOMMAALIGNEN = 0,
i_RXPCOMMAALIGNEN = 0,
i_RXSLIDE = 0,
# Receive Ports - RX Channel Bonding Ports
o_RXCHANBONDSEQ = Open(),
i_RXCHBONDEN = 0,
i_RXCHBONDI = 0b0000,
i_RXCHBONDLEVEL = 0,
i_RXCHBONDMASTER = 0,
o_RXCHBONDO = Open(),
i_RXCHBONDSLAVE = 0,
# Receive Ports - RX Channel Bonding Ports
o_RXCHANISALIGNED = Open(),
o_RXCHANREALIGN = Open(),
# Receive Ports - RX Decision Feedback Equalizer
o_DMONITOROUT = Open(),
i_RXADAPTSELTEST = 0,
i_RXDFEXYDEN = 0,
i_RXOSINTEN = 0b1,
i_RXOSINTID0 = 0,
i_RXOSINTNTRLEN = 0,
o_RXOSINTSTROBEDONE = Open(),
# Receive Ports - RX Driver,OOB signalling,Coupling and Eq.,CDR
i_RXLPMLFOVRDEN = 0,
i_RXLPMOSINTNTRLEN = 0,
# Receive Ports - RX Equalizer Ports
i_RXLPMHFHOLD = 0,
i_RXLPMHFOVRDEN = 0,
i_RXLPMLFHOLD = 0,
i_RXOSHOLD = 0,
i_RXOSOVRDEN = 0,
# Receive Ports - RX Fabric ClocK Output Control Ports
o_RXRATEDONE = Open(),
# Receive Ports - RX Fabric Clock Output Control Ports
i_RXRATEMODE = 0b0,
# Receive Ports - RX Fabric Output Control Ports
o_RXOUTCLK = self.rxoutclk,
o_RXOUTCLKFABRIC = Open(),
o_RXOUTCLKPCS = Open(),
i_RXOUTCLKSEL = 0b010,
# Receive Ports - RX Gearbox Ports
o_RXDATAVALID = Open(),
o_RXHEADER = Open(),
o_RXHEADERVALID = Open(),
o_RXSTARTOFSEQ = Open(),
i_RXGEARBOXSLIP = 0,
# Receive Ports - RX Initialization and Reset Ports
i_GTRXRESET = rx_reset,
i_RXLPMRESET = 0,
i_RXOOBRESET = 0,
i_RXPCSRESET = 0,
i_RXPMARESET = 0,
# Receive Ports - RX OOB Signaling ports
o_RXCOMSASDET = Open(),
o_RXCOMWAKEDET = Open(),
o_RXCOMINITDET = Open(),
o_RXELECIDLE = Open(),
i_RXELECIDLEMODE = 0b11,
# Receive Ports - RX Polarity Control Ports
i_RXPOLARITY = rx_polarity,
# Receive Ports -RX Initialization and Reset Ports
o_RXRESETDONE = rx_reset_done,
# TX Buffer Bypass Ports
i_TXPHDLYTSTCLK = 0,
# TX Configurable Driver Ports
i_TXPOSTCURSOR = 0b00000,
i_TXPOSTCURSORINV = 0,
i_TXPRECURSOR = 0,
i_TXPRECURSORINV = 0,
# TX Fabric Clock Output Control Ports
i_TXRATEMODE = 0,
# TX Initialization and Reset Ports
i_CFGRESET = 0,
i_GTTXRESET = tx_reset,
o_PCSRSVDOUT = Open(),
i_TXUSERRDY = tx_mmcm_locked,
# TX Phase Interpolator PPM Controller Ports
i_TXPIPPMEN = 0,
i_TXPIPPMOVRDEN = 0,
i_TXPIPPMPD = 0,
i_TXPIPPMSEL = 1,
i_TXPIPPMSTEPSIZE = 0,
# Transceiver Reset Mode Operation
i_GTRESETSEL = 0,
i_RESETOVRD = 0,
# Transmit Ports
o_TXPMARESETDONE = Open(),
# Transmit Ports - Configurable Driver Ports
i_PMARSVDIN0 = 0b0,
i_PMARSVDIN1 = 0b0,
# Transmit Ports - FPGA TX Interface Ports
i_TXDATA = Cat(tx_data[:8], tx_data[10:18]),
i_TXUSRCLK = ClockSignal("eth_tx_half"),
i_TXUSRCLK2 = ClockSignal("eth_tx_half"),
# Transmit Ports - PCI Express Ports
i_TXELECIDLE = 0,
i_TXMARGIN = 0,
i_TXRATE = 0,
i_TXSWING = 0,
# Transmit Ports - Pattern Generator Ports
i_TXPRBSFORCEERR = 0,
# Transmit Ports - TX 8B/10B Encoder Ports
i_TX8B10BBYPASS = 0,
i_TXCHARDISPMODE = Cat(tx_data[9], tx_data[19]),
i_TXCHARDISPVAL = Cat(tx_data[8], tx_data[18]),
i_TXCHARISK = 0,
# Transmit Ports - TX Buffer Bypass Ports
i_TXDLYBYPASS = 1,
i_TXDLYEN = 0,
i_TXDLYHOLD = 0,
i_TXDLYOVRDEN = 0,
i_TXDLYSRESET = 0,
o_TXDLYSRESETDONE = Open(),
i_TXDLYUPDOWN = 0,
i_TXPHALIGN = 0,
o_TXPHALIGNDONE = Open(),
i_TXPHALIGNEN = 0,
i_TXPHDLYPD = 0,
i_TXPHDLYRESET = 0,
i_TXPHINIT = 0,
o_TXPHINITDONE = Open(),
i_TXPHOVRDEN = 0,
# Transmit Ports - TX Buffer Ports
o_TXBUFSTATUS = Open(),
# Transmit Ports - TX Buffer and Phase Alignment Ports
i_TXSYNCALLIN = 0,
o_TXSYNCDONE = Open(),
i_TXSYNCIN = 0,
i_TXSYNCMODE = 0,
o_TXSYNCOUT = Open(),
# Transmit Ports - TX Configurable Driver Ports
o_GTPTXN = data_pads.txn,
o_GTPTXP = data_pads.txp,
i_TXBUFDIFFCTRL = 0b100,
i_TXDEEMPH = 0,
i_TXDIFFCTRL = 0b1000,
i_TXDIFFPD = 0,
i_TXINHIBIT = 0,
i_TXMAINCURSOR = 0b0000000,
i_TXPISOPD = 0,
# Transmit Ports - TX Fabric Clock Output Control Ports
o_TXOUTCLK = self.txoutclk,
o_TXOUTCLKFABRIC = Open(),
o_TXOUTCLKPCS = Open(),
i_TXOUTCLKSEL = 0b010,
o_TXRATEDONE = Open(),
# Transmit Ports - TX Gearbox Ports
o_TXGEARBOXREADY = Open(),
i_TXHEADER = 0,
i_TXSEQUENCE = 0,
i_TXSTARTSEQ = 0,
# Transmit Ports - TX Initialization and Reset Ports
i_TXPCSRESET = 0,
i_TXPMARESET = 0,
o_TXRESETDONE = tx_reset_done,
# Transmit Ports - TX OOB signalling Ports
o_TXCOMFINISH = Open(),
i_TXCOMINIT = 0,
i_TXCOMSAS = 0,
i_TXCOMWAKE = 0,
i_TXPDELECIDLEMODE = 0,
# Transmit Ports - TX Polarity Control Ports
i_TXPOLARITY = tx_polarity,
# Transmit Ports - TX Receiver Detection Ports
i_TXDETECTRX = 0,
# Transmit Ports - pattern Generator Ports
i_TXPRBSSEL = 0
)
if qpll_channel.index == 0:
gtp_params.update(
# Clocking Ports
i_RXSYSCLKSEL = 0b00,
i_TXSYSCLKSEL = 0b00,
# GTPE2_CHANNEL Clocking Ports
i_PLL0CLK = qpll_channel.clk,
i_PLL0REFCLK = qpll_channel.refclk,
i_PLL1CLK = 0,
i_PLL1REFCLK = 0,
)
elif qpll_channel.index == 1:
gtp_params.update(
# Clocking Ports
i_RXSYSCLKSEL = 0b11,
i_TXSYSCLKSEL = 0b11,
# GTPE2_CHANNEL Clocking Ports
i_PLL0CLK = 0,
i_PLL0REFCLK = 0,
i_PLL1CLK = qpll_channel.clk,
i_PLL1REFCLK = qpll_channel.refclk,
)
else:
raise ValueError
self.specials += Instance("GTPE2_CHANNEL", **gtp_params)
# Get 125MHz clocks back - the GTP is outputting 62.5MHz.
txoutclk_rebuffer = Signal()
self.specials += Instance("BUFH",
i_I = self.txoutclk,
o_O = txoutclk_rebuffer
)
rxoutclk_rebuffer = Signal()
self.specials += Instance("BUFG",
i_I = self.rxoutclk,
o_O = rxoutclk_rebuffer
)
# TX MMCM.
self.tx_mmcm = tx_mmcm = S7MMCM()
tx_mmcm.register_clkin(txoutclk_rebuffer, 156.25e6)
tx_mmcm.create_clkout(self.cd_eth_tx_half, 156.25e6, buf="bufh", with_reset=False)
tx_mmcm.create_clkout(self.cd_eth_tx, 312.5e6, buf="bufh", with_reset=True)
self.comb += tx_mmcm.reset.eq(tx_mmcm_reset)
self.comb += tx_mmcm_locked.eq(tx_mmcm.locked)
# RX MMCM.
self.rx_mmcm = rx_mmcm = S7MMCM()
rx_mmcm.register_clkin(rxoutclk_rebuffer, 156.25e6)
rx_mmcm.create_clkout(self.cd_eth_rx_half, 156.25e6, buf="bufg", with_reset=False)
rx_mmcm.create_clkout(self.cd_eth_rx, 312.5e6, buf="bufg", with_reset=True)
self.comb += rx_mmcm.reset.eq(rx_mmcm_reset)
self.comb += rx_mmcm_locked.eq(rx_mmcm.locked)
# Transceiver init
tx_init = GTPTxInit(sys_clk_freq)
self.submodules += tx_init
self.comb += [
qpll_channel.reset.eq(tx_init.qpll_reset),
tx_init.qpll_lock.eq(qpll_channel.lock),
tx_reset.eq(tx_init.tx_reset | self.reset)
]
self.sync += tx_mmcm_reset.eq(~qpll_channel.lock)
tx_mmcm_reset.attr.add("no_retiming")
rx_init = GTPRxInit(sys_clk_freq)
self.submodules += rx_init
self.comb += [
rx_init.enable.eq(tx_init.done),
rx_reset.eq(rx_init.rx_reset | self.reset),
rx_init.rx_pma_reset_done.eq(rx_pma_reset_done),
drpaddr.eq(rx_init.drpaddr),
drpen.eq(rx_init.drpen),
drpdi.eq(rx_init.drpdi),
rx_init.drprdy.eq(drprdy),
rx_init.drpdo.eq(drpdo),
drpwe.eq(rx_init.drpwe)
]
ps_restart = PulseSynchronizer("eth_tx", "sys")
self.submodules += ps_restart
self.comb += [
ps_restart.i.eq(pcs.restart),
rx_init.restart.eq(ps_restart.o)
]
# Assume CDR lock time is 50,000 UI as per DS183 and similar to what the Xilinx wizards does.
cdr_lock_time = round(sys_clk_freq*50e3/(312.5e6))
cdr_lock_counter = Signal(max=cdr_lock_time+1)
cdr_locked = Signal()
self.sync += [
If(rx_reset,
cdr_locked.eq(0),
cdr_lock_counter.eq(0)
).Elif(cdr_lock_counter != cdr_lock_time,
cdr_lock_counter.eq(cdr_lock_counter + 1)
).Else(
cdr_locked.eq(1)
),
rx_mmcm_reset.eq(~cdr_locked)
]
rx_mmcm_reset.attr.add("no_retiming")
# Gearbox and PCS connection
self.gearbox = gearbox = PCSGearbox()
self.comb += [
tx_data.eq(gearbox.tx_data_half),
gearbox.rx_data_half.eq(rx_data),
gearbox.tx_data.eq(pcs.tbi_tx),
pcs.tbi_rx.eq(gearbox.rx_data)
]
def add_csr(self):
self._reset = CSRStorage()
self.comb += self.reset.eq(self._reset.storage)