def __init__(self, qpll_channel, pads, sys_clk_freq, rtio_clk_freq, mode):
assert mode in ["single", "master", "slave"]
self.mode = mode
# # #
self.stable_clkin = Signal()
self.submodules.encoder = encoder = ClockDomainsRenamer("rtio_tx")(
Encoder(2, True))
self.submodules.decoders = decoders = [
ClockDomainsRenamer("rtio_rx")((Decoder(True))) for _ in range(2)
]
self.rx_ready = Signal()
# transceiver direct clock outputs
# useful to specify clock constraints in a way palatable to Vivado
self.txoutclk = Signal()
self.rxoutclk = Signal()
# # #
# TX generates RTIO clock, init must be in system domain
self.submodules.tx_init = tx_init = GTPTXInit(sys_clk_freq, mode)
# RX receives restart commands from RTIO domain
rx_init = ClockDomainsRenamer("rtio_tx")(GTPRXInit(rtio_clk_freq))
self.submodules += rx_init
self.comb += [
tx_init.stable_clkin.eq(self.stable_clkin),
qpll_channel.reset.eq(tx_init.pllreset),
tx_init.plllock.eq(qpll_channel.lock)
]
txdata = Signal(20)
rxdata = Signal(20)
rxphaligndone = Signal()
gtp_params = dict(
# Simulation-Only Attributes
p_SIM_RECEIVER_DETECT_PASS="******",
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="FALSE",
p_RXSLIDE_AUTO_WAIT=7,
p_RXSLIDE_MODE="PCS",
p_RX_SIG_VALID_DLY=10,
# RX 8B/10B Decoder Attributes
p_RX_DISPERR_SEQ_MATCH="FALSE",
p_DEC_MCOMMA_DETECT="TRUE",
p_DEC_PCOMMA_DETECT="TRUE",
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="FALSE",
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="RXUSR",
p_RX_DDI_SEL=0b000000,
p_RX_DEFER_RESET_BUF_EN="TRUE",
# CDR Attributes
p_RXCDR_CFG=0x0001107FE206021081010,
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="FALSE",
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="TXUSR",
# 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=0b1,
p_TXSYNC_SKIP_DA=0b0)
gtp_params.update(
# CPLL Ports
i_GTRSVD=0b0000000000000000,
i_PCSRSVDIN=0b0000000000000000,
i_TSTIN=0b11111111111111111111,
# Channel - DRP Ports
i_DRPADDR=rx_init.drpaddr,
i_DRPCLK=ClockSignal("rtio_tx"),
i_DRPDI=rx_init.drpdi,
o_DRPDO=rx_init.drpdo,
i_DRPEN=rx_init.drpen,
o_DRPRDY=rx_init.drprdy,
i_DRPWE=rx_init.drpwe,
# FPGA TX Interface Datapath Configuration
i_TX8B10BEN=0,
# Loopback Ports
i_LOOPBACK=0,
# PCI Express Ports
#o_PHYSTATUS =,
i_RXRATE=0,
#o_RXVALID =,
# PMA Reserved Ports
i_PMARSVDIN3=0b0,
i_PMARSVDIN4=0b0,
# Power-Down Ports
i_RXPD=Cat(rx_init.gtrxpd, rx_init.gtrxpd),
i_TXPD=0b00,
# RX 8B/10B Decoder Ports
i_SETERRSTATUS=0,
# RX Initialization and Reset Ports
i_EYESCANRESET=0,
i_RXUSERRDY=rx_init.rxuserrdy,
# RX Margin Analysis Ports
#o_EYESCANDATAERROR =,
i_EYESCANMODE=0,
i_EYESCANTRIGGER=0,
# Receive Ports
i_CLKRSVD0=0,
i_CLKRSVD1=0,
i_DMONFIFORESET=0,
i_DMONITORCLK=0,
o_RXPMARESETDONE=rx_init.rxpmaresetdone,
i_SIGVALIDCLK=0,
# Receive Ports - CDR Ports
i_RXCDRFREQRESET=0,
i_RXCDRHOLD=0,
#o_RXCDRLOCK =,
i_RXCDROVRDEN=0,
i_RXCDRRESET=0,
i_RXCDRRESETRSV=0,
i_RXOSCALRESET=0,
i_RXOSINTCFG=0b0010,
#o_RXOSINTDONE =,
i_RXOSINTHOLD=0,
i_RXOSINTOVRDEN=0,
i_RXOSINTPD=0,
#o_RXOSINTSTARTED =,
i_RXOSINTSTROBE=0,
#o_RXOSINTSTROBESTARTED =,
i_RXOSINTTESTOVRDEN=0,
# Receive Ports - Clock Correction Ports
#o_RXCLKCORCNT =,
# Receive Ports - FPGA RX Interface Datapath Configuration
i_RX8B10BEN=0,
# Receive Ports - FPGA RX Interface Ports
o_RXDATA=Cat(rxdata[:8], rxdata[10:18]),
i_RXUSRCLK=ClockSignal("rtio_rx"),
i_RXUSRCLK2=ClockSignal("rtio_rx"),
# Receive Ports - Pattern Checker Ports
#o_RXPRBSERR =,
i_RXPRBSSEL=0,
# Receive Ports - Pattern Checker ports
i_RXPRBSCNTRESET=0,
# Receive Ports - RX 8B/10B Decoder Ports
#o_RXCHARISCOMMA =,
o_RXCHARISK=Cat(rxdata[8], rxdata[18]),
o_RXDISPERR=Cat(rxdata[9], rxdata[19]),
#o_RXNOTINTABLE =,
# Receive Ports - RX AFE Ports
i_GTPRXN=pads.rxn,
i_GTPRXP=pads.rxp,
i_PMARSVDIN2=0b0,
#o_PMARSVDOUT0 =,
#o_PMARSVDOUT1 =,
# Receive Ports - RX Buffer Bypass Ports
i_RXBUFRESET=0,
#o_RXBUFSTATUS =,
i_RXDDIEN=1,
i_RXDLYBYPASS=0,
i_RXDLYEN=1,
i_RXDLYOVRDEN=0,
i_RXDLYSRESET=rx_init.rxdlysreset,
o_RXDLYSRESETDONE=rx_init.rxdlysresetdone,
i_RXPHALIGN=0,
o_RXPHALIGNDONE=rxphaligndone,
i_RXPHALIGNEN=0,
i_RXPHDLYPD=0,
i_RXPHDLYRESET=0,
#o_RXPHMONITOR =,
i_RXPHOVRDEN=0,
#o_RXPHSLIPMONITOR =,
#o_RXSTATUS =,
i_RXSYNCALLIN=rxphaligndone,
o_RXSYNCDONE=rx_init.rxsyncdone,
i_RXSYNCIN=0,
i_RXSYNCMODE=1,
#o_RXSYNCOUT =,
# Receive Ports - RX Byte and Word Alignment Ports
#o_RXBYTEISALIGNED =,
#o_RXBYTEREALIGN =,
#o_RXCOMMADET =,
i_RXCOMMADETEN=1,
i_RXMCOMMAALIGNEN=0,
i_RXPCOMMAALIGNEN=0,
i_RXSLIDE=0,
# Receive Ports - RX Channel Bonding Ports
#o_RXCHANBONDSEQ =,
i_RXCHBONDEN=0,
i_RXCHBONDI=0b0000,
i_RXCHBONDLEVEL=0,
i_RXCHBONDMASTER=0,
#o_RXCHBONDO =,
i_RXCHBONDSLAVE=0,
# Receive Ports - RX Channel Bonding Ports
#o_RXCHANISALIGNED =,
#o_RXCHANREALIGN =,
# Receive Ports - RX Decision Feedback Equalizer
#o_DMONITOROUT =,
i_RXADAPTSELTEST=0,
i_RXDFEXYDEN=0,
i_RXOSINTEN=0b1,
i_RXOSINTID0=0,
i_RXOSINTNTRLEN=0,
#o_RXOSINTSTROBEDONE =,
# 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 =,
# Receive Ports - RX Fabric Clock Output Control Ports
i_RXRATEMODE=0b0,
# Receive Ports - RX Fabric Output Control Ports
o_RXOUTCLK=self.rxoutclk,
#o_RXOUTCLKFABRIC =,
#o_RXOUTCLKPCS =,
i_RXOUTCLKSEL=0b010,
# Receive Ports - RX Gearbox Ports
#o_RXDATAVALID =,
#o_RXHEADER =,
#o_RXHEADERVALID =,
#o_RXSTARTOFSEQ =,
i_RXGEARBOXSLIP=0,
# Receive Ports - RX Initialization and Reset Ports
i_GTRXRESET=rx_init.gtrxreset,
i_RXLPMRESET=0,
i_RXOOBRESET=0,
i_RXPCSRESET=0,
i_RXPMARESET=0,
# Receive Ports - RX OOB Signaling ports
#o_RXCOMSASDET =,
#o_RXCOMWAKEDET =,
#o_RXCOMINITDET =,
#o_RXELECIDLE =,
i_RXELECIDLEMODE=0b11,
# Receive Ports - RX Polarity Control Ports
i_RXPOLARITY=0,
# Receive Ports -RX Initialization and Reset Ports
o_RXRESETDONE=rx_init.rxresetdone,
# 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_init.gttxreset,
#o_PCSRSVDOUT =,
i_TXUSERRDY=tx_init.txuserrdy,
# TX Phase Interpolator PPM Controller Ports
i_TXPIPPMEN=0,
i_TXPIPPMOVRDEN=0,
i_TXPIPPMPD=0,
i_TXPIPPMSEL=0,
i_TXPIPPMSTEPSIZE=0,
# Transceiver Reset Mode Operation
i_GTRESETSEL=0,
i_RESETOVRD=0,
# Transmit Ports
#o_TXPMARESETDONE =,
# Transmit Ports - Configurable Driver Ports
i_PMARSVDIN0=0b0,
i_PMARSVDIN1=0b0,
# Transmit Ports - FPGA TX Interface Ports
i_TXDATA=Cat(txdata[:8], txdata[10:18]),
i_TXUSRCLK=ClockSignal("rtio_tx"),
i_TXUSRCLK2=ClockSignal("rtio_tx"),
# 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(txdata[9], txdata[19]),
i_TXCHARDISPVAL=Cat(txdata[8], txdata[18]),
i_TXCHARISK=0,
# Transmit Ports - TX Buffer Bypass Ports
i_TXDLYBYPASS=0,
i_TXDLYEN=tx_init.txdlyen,
i_TXDLYHOLD=0,
i_TXDLYOVRDEN=0,
i_TXDLYSRESET=tx_init.txdlysreset,
o_TXDLYSRESETDONE=tx_init.txdlysresetdone,
i_TXDLYUPDOWN=0,
i_TXPHALIGN=tx_init.txphalign,
o_TXPHALIGNDONE=tx_init.txphaligndone,
i_TXPHALIGNEN=1,
i_TXPHDLYPD=0,
i_TXPHDLYRESET=0,
i_TXPHINIT=tx_init.txphinit,
o_TXPHINITDONE=tx_init.txphinitdone,
i_TXPHOVRDEN=0,
# Transmit Ports - TX Buffer Ports
#o_TXBUFSTATUS =,
# Transmit Ports - TX Buffer and Phase Alignment Ports
i_TXSYNCALLIN=0,
#o_TXSYNCDONE =,
#i_TXSYNCIN =0,
#i_TXSYNCMODE =0,
#o_TXSYNCOUT =,
# Transmit Ports - TX Configurable Driver Ports
o_GTPTXN=pads.txn,
o_GTPTXP=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 =,
#o_TXOUTCLKPCS =,
i_TXOUTCLKSEL=0b011,
#o_TXRATEDONE =,
# Transmit Ports - TX Gearbox Ports
#o_TXGEARBOXREADY =,
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_init.txresetdone,
# Transmit Ports - TX OOB signalling Ports
#o_TXCOMFINISH =,
i_TXCOMINIT=0,
i_TXCOMSAS=0,
i_TXCOMWAKE=0,
i_TXPDELECIDLEMODE=0,
# Transmit Ports - TX Polarity Control Ports
i_TXPOLARITY=0,
# 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(
i_RXSYSCLKSEL=0b00,
i_TXSYSCLKSEL=0b00,
i_PLL0CLK=qpll_channel.clk,
i_PLL0REFCLK=qpll_channel.refclk,
i_PLL1CLK=0,
i_PLL1REFCLK=0,
)
elif qpll_channel.index == 1:
gtp_params.update(
i_RXSYSCLKSEL=0b11,
i_TXSYSCLKSEL=0b11,
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)
# tx clocking
tx_reset_deglitched = Signal()
tx_reset_deglitched.attr.add("no_retiming")
self.sync += tx_reset_deglitched.eq(~tx_init.done)
self.clock_domains.cd_rtio_tx = ClockDomain()
if mode == "master" or mode == "single":
self.specials += Instance("BUFG",
i_I=self.txoutclk,
o_O=self.cd_rtio_tx.clk)
self.specials += AsyncResetSynchronizer(self.cd_rtio_tx,
tx_reset_deglitched)
# rx clocking
rx_reset_deglitched = Signal()
rx_reset_deglitched.attr.add("no_retiming")
self.sync.rtio_tx += rx_reset_deglitched.eq(~rx_init.done)
self.clock_domains.cd_rtio_rx = ClockDomain()
self.specials += [
Instance("BUFG", i_I=self.rxoutclk, o_O=self.cd_rtio_rx.clk),
AsyncResetSynchronizer(self.cd_rtio_rx, rx_reset_deglitched)
]
# tx data
self.comb += txdata.eq(Cat(*[encoder.output[i] for i in range(2)]))
# rx data
for i in range(2):
self.comb += decoders[i].input.eq(rxdata[10 * i:10 * (i + 1)])
# clock alignment
clock_aligner = BruteforceClockAligner(0b0101111100,
rtio_clk_freq,
check_period=12e-3)
self.submodules += clock_aligner
self.comb += [
clock_aligner.rxdata.eq(rxdata),
rx_init.restart.eq(clock_aligner.restart),
self.rx_ready.eq(clock_aligner.ready)
]
def __init__(self, pll, pads, mode="master"):
self.tx_k = Signal(4)
self.tx_d = Signal(32)
self.rx_k = Signal(4)
self.rx_d = Signal(32)
self.tx_idle = Signal()
self.tx_comma = Signal()
self.rx_idle = Signal()
self.rx_comma = Signal()
self.rx_bitslip_value = Signal(6)
self.rx_delay_rst = Signal()
self.rx_delay_inc = Signal()
self.rx_delay_ce = Signal()
# # #
self.submodules.encoder = ClockDomainsRenamer("serwb_serdes")(Encoder(
4, True))
self.decoders = [
ClockDomainsRenamer("serwb_serdes")(Decoder(True))
for _ in range(4)
]
self.submodules += self.decoders
# clocking:
# In master mode:
# - linerate/10 pll refclk provided by user
# - linerate/10 slave refclk generated on clk_pads
# In Slave mode:
# - linerate/10 pll refclk provided by clk_pads
self.clock_domains.cd_serwb_serdes = ClockDomain()
self.clock_domains.cd_serwb_serdes_5x = ClockDomain()
self.clock_domains.cd_serwb_serdes_20x = ClockDomain(reset_less=True)
self.comb += [
self.cd_serwb_serdes.clk.eq(pll.serwb_serdes_clk),
self.cd_serwb_serdes_5x.clk.eq(pll.serwb_serdes_5x_clk),
self.cd_serwb_serdes_20x.clk.eq(pll.serwb_serdes_20x_clk)
]
self.specials += AsyncResetSynchronizer(self.cd_serwb_serdes,
~pll.lock)
self.comb += self.cd_serwb_serdes_5x.rst.eq(self.cd_serwb_serdes.rst)
# control/status cdc
tx_idle = Signal()
tx_comma = Signal()
rx_idle = Signal()
rx_comma = Signal()
rx_bitslip_value = Signal(6)
self.specials += [
MultiReg(self.tx_idle, tx_idle, "serwb_serdes"),
MultiReg(self.tx_comma, tx_comma, "serwb_serdes"),
MultiReg(rx_idle, self.rx_idle, "sys"),
MultiReg(rx_comma, self.rx_comma, "sys")
]
self.specials += MultiReg(self.rx_bitslip_value, rx_bitslip_value,
"serwb_serdes"),
# tx clock (linerate/10)
if mode == "master":
self.submodules.tx_clk_gearbox = Gearbox(40, "serwb_serdes", 8,
"serwb_serdes_5x")
self.comb += self.tx_clk_gearbox.i.eq((0b1111100000 << 30)
| (0b1111100000 << 20)
| (0b1111100000 << 10)
| (0b1111100000 << 0))
clk_o = Signal()
self.specials += [
Instance("OSERDESE2",
p_DATA_WIDTH=8,
p_TRISTATE_WIDTH=1,
p_DATA_RATE_OQ="DDR",
p_DATA_RATE_TQ="BUF",
p_SERDES_MODE="MASTER",
o_OQ=clk_o,
i_OCE=1,
i_RST=ResetSignal("serwb_serdes"),
i_CLK=ClockSignal("serwb_serdes_20x"),
i_CLKDIV=ClockSignal("serwb_serdes_5x"),
i_D1=self.tx_clk_gearbox.o[0],
i_D2=self.tx_clk_gearbox.o[1],
i_D3=self.tx_clk_gearbox.o[2],
i_D4=self.tx_clk_gearbox.o[3],
i_D5=self.tx_clk_gearbox.o[4],
i_D6=self.tx_clk_gearbox.o[5],
i_D7=self.tx_clk_gearbox.o[6],
i_D8=self.tx_clk_gearbox.o[7]),
Instance("OBUFDS", i_I=clk_o, o_O=pads.clk_p, o_OB=pads.clk_n)
]
# tx datapath
# tx_data -> encoders -> gearbox -> serdes
self.submodules.tx_gearbox = Gearbox(40, "serwb_serdes", 8,
"serwb_serdes_5x")
self.comb += [
If(tx_comma, self.encoder.k[0].eq(1),
self.encoder.d[0].eq(0xbc)).Else(
self.encoder.k[0].eq(self.tx_k[0]), self.encoder.k[1].eq(
self.tx_k[1]), self.encoder.k[2].eq(self.tx_k[2]),
self.encoder.k[3].eq(self.tx_k[3]),
self.encoder.d[0].eq(self.tx_d[0:8]),
self.encoder.d[1].eq(self.tx_d[8:16]),
self.encoder.d[2].eq(self.tx_d[16:24]),
self.encoder.d[3].eq(self.tx_d[24:32]))
]
self.sync.serwb_serdes += \
If(tx_idle,
self.tx_gearbox.i.eq(0)
).Else(
self.tx_gearbox.i.eq(Cat(*[self.encoder.output[i] for i in range(4)]))
)
serdes_o = Signal()
self.specials += [
Instance("OSERDESE2",
p_DATA_WIDTH=8,
p_TRISTATE_WIDTH=1,
p_DATA_RATE_OQ="DDR",
p_DATA_RATE_TQ="BUF",
p_SERDES_MODE="MASTER",
o_OQ=serdes_o,
i_OCE=1,
i_RST=ResetSignal("serwb_serdes"),
i_CLK=ClockSignal("serwb_serdes_20x"),
i_CLKDIV=ClockSignal("serwb_serdes_5x"),
i_D1=self.tx_gearbox.o[0],
i_D2=self.tx_gearbox.o[1],
i_D3=self.tx_gearbox.o[2],
i_D4=self.tx_gearbox.o[3],
i_D5=self.tx_gearbox.o[4],
i_D6=self.tx_gearbox.o[5],
i_D7=self.tx_gearbox.o[6],
i_D8=self.tx_gearbox.o[7]),
Instance("OBUFDS", i_I=serdes_o, o_O=pads.tx_p, o_OB=pads.tx_n)
]
# rx clock
use_bufr = True
if mode == "slave":
clk_i = Signal()
clk_i_bufg = Signal()
self.specials += [
Instance("IBUFDS", i_I=pads.clk_p, i_IB=pads.clk_n, o_O=clk_i)
]
if use_bufr:
clk_i_bufr = Signal()
self.specials += [
Instance("BUFR", i_I=clk_i, o_O=clk_i_bufr),
Instance("BUFG", i_I=clk_i_bufr, o_O=clk_i_bufg)
]
else:
self.specials += Instance("BUFG", i_I=clk_i, o_O=clk_i_bufg)
self.comb += pll.refclk.eq(clk_i_bufg)
# rx datapath
# serdes -> gearbox -> bitslip -> decoders -> rx_data
self.submodules.rx_gearbox = Gearbox(8, "serwb_serdes_5x", 40,
"serwb_serdes")
self.submodules.rx_bitslip = ClockDomainsRenamer("serwb_serdes")(
BitSlip(40))
serdes_i_nodelay = Signal()
self.specials += [
Instance("IBUFDS_DIFF_OUT",
i_I=pads.rx_p,
i_IB=pads.rx_n,
o_O=serdes_i_nodelay)
]
serdes_i_delayed = Signal()
serdes_q = Signal(8)
self.specials += [
Instance("IDELAYE2",
p_DELAY_SRC="IDATAIN",
p_SIGNAL_PATTERN="DATA",
p_CINVCTRL_SEL="FALSE",
p_HIGH_PERFORMANCE_MODE="TRUE",
p_REFCLK_FREQUENCY=200.0,
p_PIPE_SEL="FALSE",
p_IDELAY_TYPE="VARIABLE",
p_IDELAY_VALUE=0,
i_C=ClockSignal(),
i_LD=self.rx_delay_rst,
i_CE=self.rx_delay_ce,
i_LDPIPEEN=0,
i_INC=self.rx_delay_inc,
i_IDATAIN=serdes_i_nodelay,
o_DATAOUT=serdes_i_delayed),
Instance("ISERDESE2",
p_DATA_WIDTH=8,
p_DATA_RATE="DDR",
p_SERDES_MODE="MASTER",
p_INTERFACE_TYPE="NETWORKING",
p_NUM_CE=1,
p_IOBDELAY="IFD",
i_DDLY=serdes_i_delayed,
i_CE1=1,
i_RST=ResetSignal("serwb_serdes"),
i_CLK=ClockSignal("serwb_serdes_20x"),
i_CLKB=~ClockSignal("serwb_serdes_20x"),
i_CLKDIV=ClockSignal("serwb_serdes_5x"),
i_BITSLIP=0,
o_Q8=serdes_q[0],
o_Q7=serdes_q[1],
o_Q6=serdes_q[2],
o_Q5=serdes_q[3],
o_Q4=serdes_q[4],
o_Q3=serdes_q[5],
o_Q2=serdes_q[6],
o_Q1=serdes_q[7])
]
self.comb += [
self.rx_gearbox.i.eq(serdes_q),
self.rx_bitslip.value.eq(rx_bitslip_value),
self.rx_bitslip.i.eq(self.rx_gearbox.o),
self.decoders[0].input.eq(self.rx_bitslip.o[0:10]),
self.decoders[1].input.eq(self.rx_bitslip.o[10:20]),
self.decoders[2].input.eq(self.rx_bitslip.o[20:30]),
self.decoders[3].input.eq(self.rx_bitslip.o[30:40]),
self.rx_k.eq(Cat(*[self.decoders[i].k for i in range(4)])),
self.rx_d.eq(Cat(*[self.decoders[i].d for i in range(4)])),
rx_idle.eq(self.rx_bitslip.o == 0),
rx_comma.eq(
((self.decoders[0].d == 0xbc) & (self.decoders[0].k == 1))
& ((self.decoders[1].d == 0x00) & (self.decoders[1].k == 0))
& ((self.decoders[2].d == 0x00) & (self.decoders[2].k == 0))
& ((self.decoders[3].d == 0x00) & (self.decoders[3].k == 0)))
]
def __init__(self, refclk, pads, sys_clk_freq, rtio_clk_freq, dw, mode):
assert (dw == 20) or (dw == 40)
assert mode in ["single", "master", "slave"]
self.mode = mode
# phase alignment
self.txsyncallin = Signal()
self.txphaligndone = Signal()
self.txsyncallin = Signal()
self.txsyncin = Signal()
self.txsyncout = Signal()
self.txdlysreset = Signal()
# # #
nwords = dw//10
self.submodules.encoder = encoder = ClockDomainsRenamer("rtio_tx")(
Encoder(nwords, True))
self.submodules.decoders = decoders = [ClockDomainsRenamer("rtio_rx")(
(Decoder(True))) for _ in range(nwords)]
self.rx_ready = Signal()
# transceiver direct clock outputs
# useful to specify clock constraints in a way palatable to Vivado
self.txoutclk = Signal()
self.rxoutclk = Signal()
# # #
# TX generates RTIO clock, init must be in system domain
self.submodules.tx_init = tx_init = GTHInit(sys_clk_freq, False, mode)
# RX receives restart commands from RTIO domain
rx_init = ClockDomainsRenamer("rtio_tx")(GTHInit(rtio_clk_freq, True))
self.submodules += rx_init
cpll_reset = Signal()
cpll_lock = Signal()
self.comb += [
cpll_reset.eq(tx_init.pllreset),
tx_init.plllock.eq(cpll_lock),
rx_init.plllock.eq(cpll_lock)
]
txdata = Signal(dw)
rxdata = Signal(dw)
rxphaligndone = Signal()
gth_params = dict(
p_ACJTAG_DEBUG_MODE =0b0,
p_ACJTAG_MODE =0b0,
p_ACJTAG_RESET =0b0,
p_ADAPT_CFG0 =0b1111100000000000,
p_ADAPT_CFG1 =0b0000000000000000,
p_ALIGN_COMMA_DOUBLE ="FALSE",
p_ALIGN_COMMA_ENABLE =0b0000000000,
p_ALIGN_COMMA_WORD =1,
p_ALIGN_MCOMMA_DET ="FALSE",
p_ALIGN_MCOMMA_VALUE =0b1010000011,
p_ALIGN_PCOMMA_DET ="FALSE",
p_ALIGN_PCOMMA_VALUE =0b0101111100,
p_A_RXOSCALRESET =0b0,
p_A_RXPROGDIVRESET =0b0,
p_A_TXPROGDIVRESET =0b0,
p_CBCC_DATA_SOURCE_SEL ="ENCODED",
p_CDR_SWAP_MODE_EN =0b0,
p_CHAN_BOND_KEEP_ALIGN ="FALSE",
p_CHAN_BOND_MAX_SKEW =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_CHAN_BOND_SEQ_LEN =1,
p_CLK_CORRECT_USE ="FALSE",
p_CLK_COR_KEEP_IDLE ="FALSE",
p_CLK_COR_MAX_LAT =20,
p_CLK_COR_MIN_LAT =18,
p_CLK_COR_PRECEDENCE ="TRUE",
p_CLK_COR_REPEAT_WAIT =0,
p_CLK_COR_SEQ_1_1 =0b0000000000,
p_CLK_COR_SEQ_1_2 =0b0000000000,
p_CLK_COR_SEQ_1_3 =0b0000000000,
p_CLK_COR_SEQ_1_4 =0b0000000000,
p_CLK_COR_SEQ_1_ENABLE =0b1111,
p_CLK_COR_SEQ_2_1 =0b0000000000,
p_CLK_COR_SEQ_2_2 =0b0000000000,
p_CLK_COR_SEQ_2_3 =0b0000000000,
p_CLK_COR_SEQ_2_4 =0b0000000000,
p_CLK_COR_SEQ_2_ENABLE =0b1111,
p_CLK_COR_SEQ_2_USE ="FALSE",
p_CLK_COR_SEQ_LEN =1,
p_CPLL_CFG0 =0b0110011111111000,
p_CPLL_CFG1 =0b1010010010101100,
p_CPLL_CFG2 =0b0000000000000111,
p_CPLL_CFG3 =0b000000,
p_CPLL_FBDIV =5,
p_CPLL_FBDIV_45 =4,
p_CPLL_INIT_CFG0 =0b0000001010110010,
p_CPLL_INIT_CFG1 =0b00000000,
p_CPLL_LOCK_CFG =0b0000000111101000,
p_CPLL_REFCLK_DIV =1,
p_DDI_CTRL =0b00,
p_DDI_REALIGN_WAIT =15,
p_DEC_MCOMMA_DETECT ="FALSE",
p_DEC_PCOMMA_DETECT ="FALSE",
p_DEC_VALID_COMMA_ONLY ="FALSE",
p_DFE_D_X_REL_POS =0b0,
p_DFE_VCM_COMP_EN =0b0,
p_DMONITOR_CFG0 =0b0000000000,
p_DMONITOR_CFG1 =0b00000000,
p_ES_CLK_PHASE_SEL =0b0,
p_ES_CONTROL =0b000000,
p_ES_ERRDET_EN ="FALSE",
p_ES_EYE_SCAN_EN ="FALSE",
p_ES_HORZ_OFFSET =0b000000000000,
p_ES_PMA_CFG =0b0000000000,
p_ES_PRESCALE =0b00000,
p_ES_QUALIFIER0 =0b0000000000000000,
p_ES_QUALIFIER1 =0b0000000000000000,
p_ES_QUALIFIER2 =0b0000000000000000,
p_ES_QUALIFIER3 =0b0000000000000000,
p_ES_QUALIFIER4 =0b0000000000000000,
p_ES_QUAL_MASK0 =0b0000000000000000,
p_ES_QUAL_MASK1 =0b0000000000000000,
p_ES_QUAL_MASK2 =0b0000000000000000,
p_ES_QUAL_MASK3 =0b0000000000000000,
p_ES_QUAL_MASK4 =0b0000000000000000,
p_ES_SDATA_MASK0 =0b0000000000000000,
p_ES_SDATA_MASK1 =0b0000000000000000,
p_ES_SDATA_MASK2 =0b0000000000000000,
p_ES_SDATA_MASK3 =0b0000000000000000,
p_ES_SDATA_MASK4 =0b0000000000000000,
p_EVODD_PHI_CFG =0b00000000000,
p_EYE_SCAN_SWAP_EN =0b0,
p_FTS_DESKEW_SEQ_ENABLE =0b1111,
p_FTS_LANE_DESKEW_CFG =0b1111,
p_FTS_LANE_DESKEW_EN ="FALSE",
p_GEARBOX_MODE =0b00000,
p_GM_BIAS_SELECT =0b0,
p_LOCAL_MASTER =0b1,
p_OOBDIVCTL =0b00,
p_OOB_PWRUP =0b0,
p_PCI3_AUTO_REALIGN ="OVR_1K_BLK",
p_PCI3_PIPE_RX_ELECIDLE =0b0,
p_PCI3_RX_ASYNC_EBUF_BYPASS =0b00,
p_PCI3_RX_ELECIDLE_EI2_ENABLE =0b0,
p_PCI3_RX_ELECIDLE_H2L_COUNT =0b000000,
p_PCI3_RX_ELECIDLE_H2L_DISABLE =0b000,
p_PCI3_RX_ELECIDLE_HI_COUNT =0b000000,
p_PCI3_RX_ELECIDLE_LP4_DISABLE =0b0,
p_PCI3_RX_FIFO_DISABLE =0b0,
p_PCIE_BUFG_DIV_CTRL =0b0001000000000000,
p_PCIE_RXPCS_CFG_GEN3 =0b0000001010100100,
p_PCIE_RXPMA_CFG =0b0000000000001010,
p_PCIE_TXPCS_CFG_GEN3 =0b0010010010100100,
p_PCIE_TXPMA_CFG =0b0000000000001010,
p_PCS_PCIE_EN ="FALSE",
p_PCS_RSVD0 =0b0000000000000000,
p_PCS_RSVD1 =0b000,
p_PD_TRANS_TIME_FROM_P2 =0b000000111100,
p_PD_TRANS_TIME_NONE_P2 =0b00011001,
p_PD_TRANS_TIME_TO_P2 =0b01100100,
p_PLL_SEL_MODE_GEN12 =0b00,
p_PLL_SEL_MODE_GEN3 =0b11,
p_PMA_RSV1 =0b1111000000000000,
p_PROCESS_PAR =0b010,
p_RATE_SW_USE_DRP =0b1,
p_RESET_POWERSAVE_DISABLE =0b0,
)
gth_params.update(
p_RXBUFRESET_TIME =0b00011,
p_RXBUF_ADDR_MODE ="FAST",
p_RXBUF_EIDLE_HI_CNT =0b1000,
p_RXBUF_EIDLE_LO_CNT =0b0000,
p_RXBUF_EN ="FALSE",
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_RXBUF_THRESH_OVFLW =0,
p_RXBUF_THRESH_OVRD ="FALSE",
p_RXBUF_THRESH_UNDFLW =0,
p_RXCDRFREQRESET_TIME =0b00001,
p_RXCDRPHRESET_TIME =0b00001,
p_RXCDR_CFG0 =0b0000000000000000,
p_RXCDR_CFG0_GEN3 =0b0000000000000000,
p_RXCDR_CFG1 =0b0000000000000000,
p_RXCDR_CFG1_GEN3 =0b0000000000000000,
p_RXCDR_CFG2 =0b0000011111010110,
p_RXCDR_CFG2_GEN3 =0b0000011111100110,
p_RXCDR_CFG3 =0b0000000000000000,
p_RXCDR_CFG3_GEN3 =0b0000000000000000,
p_RXCDR_CFG4 =0b0000000000000000,
p_RXCDR_CFG4_GEN3 =0b0000000000000000,
p_RXCDR_CFG5 =0b0000000000000000,
p_RXCDR_CFG5_GEN3 =0b0000000000000000,
p_RXCDR_FR_RESET_ON_EIDLE =0b0,
p_RXCDR_HOLD_DURING_EIDLE =0b0,
p_RXCDR_LOCK_CFG0 =0b0100010010000000,
p_RXCDR_LOCK_CFG1 =0b0101111111111111,
p_RXCDR_LOCK_CFG2 =0b0111011111000011,
p_RXCDR_PH_RESET_ON_EIDLE =0b0,
p_RXCFOK_CFG0 =0b0100000000000000,
p_RXCFOK_CFG1 =0b0000000001100101,
p_RXCFOK_CFG2 =0b0000000000101110,
p_RXDFELPMRESET_TIME =0b0001111,
p_RXDFELPM_KL_CFG0 =0b0000000000000000,
p_RXDFELPM_KL_CFG1 =0b0000000000000010,
p_RXDFELPM_KL_CFG2 =0b0000000000000000,
p_RXDFE_CFG0 =0b0000101000000000,
p_RXDFE_CFG1 =0b0000000000000000,
p_RXDFE_GC_CFG0 =0b0000000000000000,
p_RXDFE_GC_CFG1 =0b0111100001110000,
p_RXDFE_GC_CFG2 =0b0000000000000000,
p_RXDFE_H2_CFG0 =0b0000000000000000,
p_RXDFE_H2_CFG1 =0b0000000000000000,
p_RXDFE_H3_CFG0 =0b0100000000000000,
p_RXDFE_H3_CFG1 =0b0000000000000000,
p_RXDFE_H4_CFG0 =0b0010000000000000,
p_RXDFE_H4_CFG1 =0b0000000000000011,
p_RXDFE_H5_CFG0 =0b0010000000000000,
p_RXDFE_H5_CFG1 =0b0000000000000011,
p_RXDFE_H6_CFG0 =0b0010000000000000,
p_RXDFE_H6_CFG1 =0b0000000000000000,
p_RXDFE_H7_CFG0 =0b0010000000000000,
p_RXDFE_H7_CFG1 =0b0000000000000000,
p_RXDFE_H8_CFG0 =0b0010000000000000,
p_RXDFE_H8_CFG1 =0b0000000000000000,
p_RXDFE_H9_CFG0 =0b0010000000000000,
p_RXDFE_H9_CFG1 =0b0000000000000000,
p_RXDFE_HA_CFG0 =0b0010000000000000,
p_RXDFE_HA_CFG1 =0b0000000000000000,
p_RXDFE_HB_CFG0 =0b0010000000000000,
p_RXDFE_HB_CFG1 =0b0000000000000000,
p_RXDFE_HC_CFG0 =0b0000000000000000,
p_RXDFE_HC_CFG1 =0b0000000000000000,
p_RXDFE_HD_CFG0 =0b0000000000000000,
p_RXDFE_HD_CFG1 =0b0000000000000000,
p_RXDFE_HE_CFG0 =0b0000000000000000,
p_RXDFE_HE_CFG1 =0b0000000000000000,
p_RXDFE_HF_CFG0 =0b0000000000000000,
p_RXDFE_HF_CFG1 =0b0000000000000000,
p_RXDFE_OS_CFG0 =0b1000000000000000,
p_RXDFE_OS_CFG1 =0b0000000000000000,
p_RXDFE_UT_CFG0 =0b1000000000000000,
p_RXDFE_UT_CFG1 =0b0000000000000011,
p_RXDFE_VP_CFG0 =0b1010101000000000,
p_RXDFE_VP_CFG1 =0b0000000000110011,
p_RXDLY_CFG =0b0000000000011111,
p_RXDLY_LCFG =0b0000000000110000,
p_RXELECIDLE_CFG ="SIGCFG_4",
p_RXGBOX_FIFO_INIT_RD_ADDR =4,
p_RXGEARBOX_EN ="FALSE",
p_RXISCANRESET_TIME =0b00001,
p_RXLPM_CFG =0b0000000000000000,
p_RXLPM_GC_CFG =0b0001000000000000,
p_RXLPM_KH_CFG0 =0b0000000000000000,
p_RXLPM_KH_CFG1 =0b0000000000000010,
p_RXLPM_OS_CFG0 =0b1000000000000000,
p_RXLPM_OS_CFG1 =0b0000000000000010,
p_RXOOB_CFG =0b000000110,
p_RXOOB_CLK_CFG ="PMA",
p_RXOSCALRESET_TIME =0b00011,
p_RXOUT_DIV =2,
p_RXPCSRESET_TIME =0b00011,
p_RXPHBEACON_CFG =0b0000000000000000,
p_RXPHDLY_CFG =0b0010000000100000,
p_RXPHSAMP_CFG =0b0010000100000000,
p_RXPHSLIP_CFG =0b0110011000100010,
p_RXPH_MONITOR_SEL =0b00000,
p_RXPI_CFG0 =0b00,
p_RXPI_CFG1 =0b00,
p_RXPI_CFG2 =0b00,
p_RXPI_CFG3 =0b00,
p_RXPI_CFG4 =0b1,
p_RXPI_CFG5 =0b1,
p_RXPI_CFG6 =0b000,
p_RXPI_LPM =0b0,
p_RXPI_VREFSEL =0b0,
p_RXPMACLK_SEL ="DATA",
p_RXPMARESET_TIME =0b00011,
p_RXPRBS_ERR_LOOPBACK =0b0,
p_RXPRBS_LINKACQ_CNT =15,
p_RXSLIDE_AUTO_WAIT =7,
p_RXSLIDE_MODE ="OFF",
p_RXSYNC_MULTILANE =0b0,
p_RXSYNC_OVRD =0b0,
p_RXSYNC_SKIP_DA =0b0,
p_RX_AFE_CM_EN =0b0,
p_RX_BIAS_CFG0 =0b0000101010110100,
p_RX_BUFFER_CFG =0b000000,
p_RX_CAPFF_SARC_ENB =0b0,
p_RX_CLK25_DIV =6,
p_RX_CLKMUX_EN =0b1,
p_RX_CLK_SLIP_OVRD =0b00000,
p_RX_CM_BUF_CFG =0b1010,
p_RX_CM_BUF_PD =0b0,
p_RX_CM_SEL =0b11,
p_RX_CM_TRIM =0b1010,
p_RX_CTLE3_LPF =0b00000001,
p_RX_DATA_WIDTH =dw,
p_RX_DDI_SEL =0b000000,
p_RX_DEFER_RESET_BUF_EN ="TRUE",
p_RX_DFELPM_CFG0 =0b0110,
p_RX_DFELPM_CFG1 =0b1,
p_RX_DFELPM_KLKH_AGC_STUP_EN =0b1,
p_RX_DFE_AGC_CFG0 =0b10,
p_RX_DFE_AGC_CFG1 =0b100,
p_RX_DFE_KL_LPM_KH_CFG0 =0b01,
p_RX_DFE_KL_LPM_KH_CFG1 =0b100,
p_RX_DFE_KL_LPM_KL_CFG0 =0b01,
p_RX_DFE_KL_LPM_KL_CFG1 =0b100,
p_RX_DFE_LPM_HOLD_DURING_EIDLE =0b0,
p_RX_DISPERR_SEQ_MATCH ="TRUE",
p_RX_DIVRESET_TIME =0b00001,
p_RX_EN_HI_LR =0b0,
p_RX_EYESCAN_VS_CODE =0b0000000,
p_RX_EYESCAN_VS_NEG_DIR =0b0,
p_RX_EYESCAN_VS_RANGE =0b00,
p_RX_EYESCAN_VS_UT_SIGN =0b0,
p_RX_FABINT_USRCLK_FLOP =0b0,
p_RX_INT_DATAWIDTH =dw==40,
p_RX_PMA_POWER_SAVE =0b0,
p_RX_PROGDIV_CFG =0.0,
p_RX_SAMPLE_PERIOD =0b111,
p_RX_SIG_VALID_DLY =11,
p_RX_SUM_DFETAPREP_EN =0b0,
p_RX_SUM_IREF_TUNE =0b0000,
p_RX_SUM_RES_CTRL =0b00,
p_RX_SUM_VCMTUNE =0b0000,
p_RX_SUM_VCM_OVWR =0b0,
p_RX_SUM_VREF_TUNE =0b000,
p_RX_TUNE_AFE_OS =0b10,
p_RX_WIDEMODE_CDR =0b0,
p_RX_XCLK_SEL ="RXUSR",
p_SAS_MAX_COM =64,
p_SAS_MIN_COM =36,
p_SATA_BURST_SEQ_LEN =0b1110,
p_SATA_CPLL_CFG ="VCO_3000MHZ",
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,
p_SHOW_REALIGN_COMMA ="TRUE",
p_SIM_RECEIVER_DETECT_PASS ="******",
p_SIM_RESET_SPEEDUP ="TRUE",
p_SIM_TX_EIDLE_DRIVE_LEVEL =0b0,
p_SIM_VERSION =2,
p_TAPDLY_SET_TX =0b00,
p_TEMPERATUR_PAR =0b0010,
p_TERM_RCAL_CFG =0b100001000010000,
p_TERM_RCAL_OVRD =0b000,
p_TRANS_TIME_RATE =0b00001110,
p_TST_RSV0 =0b00000000,
p_TST_RSV1 =0b00000000,
)
gth_params.update(
p_TXBUF_EN ="FALSE",
p_TXBUF_RESET_ON_RATE_CHANGE ="TRUE",
p_TXDLY_CFG =0b0000000000001001,
p_TXDLY_LCFG =0b0000000001010000,
p_TXDRVBIAS_N =0b1010,
p_TXDRVBIAS_P =0b1010,
p_TXFIFO_ADDR_CFG ="LOW",
p_TXGBOX_FIFO_INIT_RD_ADDR =4,
p_TXGEARBOX_EN ="FALSE",
p_TXOUT_DIV =2,
p_TXPCSRESET_TIME =0b00011,
p_TXPHDLY_CFG0 =0b0010000000100000,
p_TXPHDLY_CFG1 =0b0000000001110101,
p_TXPH_CFG =0b0000100110000000,
p_TXPH_MONITOR_SEL =0b00000,
p_TXPI_CFG0 =0b00,
p_TXPI_CFG1 =0b00,
p_TXPI_CFG2 =0b00,
p_TXPI_CFG3 =0b1,
p_TXPI_CFG4 =0b1,
p_TXPI_CFG5 =0b000,
p_TXPI_GRAY_SEL =0b0,
p_TXPI_INVSTROBE_SEL =0b0,
p_TXPI_LPM =0b0,
p_TXPI_PPMCLK_SEL ="TXUSRCLK2",
p_TXPI_PPM_CFG =0b00000000,
p_TXPI_SYNFREQ_PPM =0b001,
p_TXPI_VREFSEL =0b0,
p_TXPMARESET_TIME =0b00011,
p_TXSYNC_MULTILANE =0 if mode == "single" else 1,
p_TXSYNC_OVRD =0b0,
p_TXSYNC_SKIP_DA =0b0,
p_TX_CLK25_DIV =6,
p_TX_CLKMUX_EN =0b1,
p_TX_DATA_WIDTH =dw,
p_TX_DCD_CFG =0b000010,
p_TX_DCD_EN =0b0,
p_TX_DEEMPH0 =0b000000,
p_TX_DEEMPH1 =0b000000,
p_TX_DIVRESET_TIME =0b00001,
p_TX_DRIVE_MODE ="DIRECT",
p_TX_EIDLE_ASSERT_DELAY =0b100,
p_TX_EIDLE_DEASSERT_DELAY =0b011,
p_TX_EML_PHI_TUNE =0b0,
p_TX_FABINT_USRCLK_FLOP =0b0,
p_TX_IDLE_DATA_ZERO =0b0,
p_TX_INT_DATAWIDTH =dw==40,
p_TX_LOOPBACK_DRIVE_HIZ ="FALSE",
p_TX_MAINCURSOR_SEL =0b0,
p_TX_MARGIN_FULL_0 =0b1001111,
p_TX_MARGIN_FULL_1 =0b1001110,
p_TX_MARGIN_FULL_2 =0b1001100,
p_TX_MARGIN_FULL_3 =0b1001010,
p_TX_MARGIN_FULL_4 =0b1001000,
p_TX_MARGIN_LOW_0 =0b1000110,
p_TX_MARGIN_LOW_1 =0b1000101,
p_TX_MARGIN_LOW_2 =0b1000011,
p_TX_MARGIN_LOW_3 =0b1000010,
p_TX_MARGIN_LOW_4 =0b1000000,
p_TX_MODE_SEL =0b000,
p_TX_PMADATA_OPT =0b0,
p_TX_PMA_POWER_SAVE =0b0,
p_TX_PROGCLK_SEL ="PREPI",
p_TX_PROGDIV_CFG =0.0,
p_TX_QPI_STATUS_EN =0b0,
p_TX_RXDETECT_CFG =0b00000000110010,
p_TX_RXDETECT_REF =0b100,
p_TX_SAMPLE_PERIOD =0b111,
p_TX_SARC_LPBK_ENB =0b0,
p_TX_XCLK_SEL ="TXUSR",
p_USE_PCS_CLK_PHASE_SEL =0b0,
p_WB_MODE =0b00,
)
gth_params.update(
# Reset modes
i_GTRESETSEL=0,
i_RESETOVRD=0,
i_CPLLRESET=0,
i_CPLLPD=cpll_reset,
o_CPLLLOCK=cpll_lock,
i_CPLLLOCKEN=1,
i_CPLLREFCLKSEL=0b001,
i_TSTIN=2**20-1,
i_GTREFCLK0=refclk,
# TX clock
o_TXOUTCLK=self.txoutclk,
i_TXSYSCLKSEL=0b00,
i_TXPLLCLKSEL=0b00,
i_TXOUTCLKSEL=0b11,
# TX Startup/Reset
i_GTTXRESET=tx_init.gtXxreset,
o_TXRESETDONE=tx_init.Xxresetdone,
i_TXDLYSRESET=tx_init.Xxdlysreset if mode != "slave" else self.txdlysreset,
o_TXDLYSRESETDONE=tx_init.Xxdlysresetdone,
o_TXPHALIGNDONE=tx_init.Xxphaligndone,
i_TXUSERRDY=tx_init.Xxuserrdy,
i_TXSYNCMODE=mode != "slave",
i_TXSYNCALLIN=self.txsyncallin,
i_TXSYNCIN=self.txsyncin,
o_TXSYNCOUT=self.txsyncout,
# TX data
i_TXCTRL0=Cat(*[txdata[10*i+8] for i in range(nwords)]),
i_TXCTRL1=Cat(*[txdata[10*i+9] for i in range(nwords)]),
i_TXDATA=Cat(*[txdata[10*i:10*i+8] for i in range(nwords)]),
i_TXUSRCLK=ClockSignal("rtio_tx"),
i_TXUSRCLK2=ClockSignal("rtio_tx"),
# TX electrical
i_TXPD=0b00,
i_TXBUFDIFFCTRL=0b000,
i_TXDIFFCTRL=0b1100,
# RX Startup/Reset
i_GTRXRESET=rx_init.gtXxreset,
o_RXRESETDONE=rx_init.Xxresetdone,
i_RXDLYSRESET=rx_init.Xxdlysreset,
o_RXPHALIGNDONE=rxphaligndone,
i_RXSYNCALLIN=rxphaligndone,
i_RXUSERRDY=rx_init.Xxuserrdy,
i_RXSYNCIN=0,
i_RXSYNCMODE=1,
o_RXSYNCDONE=rx_init.Xxsyncdone,
# RX AFE
i_RXDFEAGCCTRL=1,
i_RXDFEXYDEN=1,
i_RXLPMEN=1,
i_RXOSINTCFG=0xd,
i_RXOSINTEN=1,
# RX clock
i_RXRATE=0,
i_RXDLYBYPASS=0,
i_RXSYSCLKSEL=0b00,
i_RXOUTCLKSEL=0b010,
i_RXPLLCLKSEL=0b00,
o_RXOUTCLK=self.rxoutclk,
i_RXUSRCLK=ClockSignal("rtio_rx"),
i_RXUSRCLK2=ClockSignal("rtio_rx"),
# RX data
o_RXCTRL0=Cat(*[rxdata[10*i+8] for i in range(nwords)]),
o_RXCTRL1=Cat(*[rxdata[10*i+9] for i in range(nwords)]),
o_RXDATA=Cat(*[rxdata[10*i:10*i+8] for i in range(nwords)]),
# RX electrical
i_RXPD=Replicate(rx_init.restart, 2),
i_RXELECIDLEMODE=0b11,
# Pads
i_GTHRXP=pads.rxp,
i_GTHRXN=pads.rxn,
o_GTHTXP=pads.txp,
o_GTHTXN=pads.txn
)
self.specials += Instance("GTHE3_CHANNEL", **gth_params)
self.comb += self.txphaligndone.eq(tx_init.Xxphaligndone)
self.submodules += [
add_probe_async("drtio_gth", "cpll_lock", cpll_lock),
add_probe_async("drtio_gth", "txuserrdy", tx_init.Xxuserrdy),
add_probe_async("drtio_gth", "tx_init_done", tx_init.done),
add_probe_async("drtio_gth", "rxuserrdy", rx_init.Xxuserrdy),
add_probe_async("drtio_gth", "rx_init_done", rx_init.done),
add_probe_buffer("drtio_gth", "txdata", txdata, clock_domain="rtio_tx"),
add_probe_buffer("drtio_gth", "rxdata", rxdata, clock_domain="rtio_rx")
]
# tx clocking
tx_reset_deglitched = Signal()
tx_reset_deglitched.attr.add("no_retiming")
self.sync += tx_reset_deglitched.eq(~tx_init.done)
self.clock_domains.cd_rtio_tx = ClockDomain()
if mode == "master" or mode == "single":
self.specials += \
Instance("BUFG_GT", i_I=self.txoutclk, o_O=self.cd_rtio_tx.clk, i_DIV=0)
self.specials += AsyncResetSynchronizer(self.cd_rtio_tx, tx_reset_deglitched)
# rx clocking
rx_reset_deglitched = Signal()
rx_reset_deglitched.attr.add("no_retiming")
self.sync.rtio_tx += rx_reset_deglitched.eq(~rx_init.done)
self.clock_domains.cd_rtio_rx = ClockDomain()
self.specials += [
Instance("BUFG_GT", i_I=self.rxoutclk, o_O=self.cd_rtio_rx.clk),
AsyncResetSynchronizer(self.cd_rtio_rx, rx_reset_deglitched)
]
# tx data
self.comb += txdata.eq(Cat(*[encoder.output[i] for i in range(nwords)]))
# rx data
for i in range(nwords):
self.comb += decoders[i].input.eq(rxdata[10*i:10*(i+1)])
# clock alignment
clock_aligner = BruteforceClockAligner(0b0101111100, rtio_clk_freq)
self.submodules += clock_aligner
self.comb += [
clock_aligner.rxdata.eq(rxdata),
rx_init.restart.eq(clock_aligner.restart),
self.rx_ready.eq(clock_aligner.ready)
]
self.submodules += add_probe_async("drtio_gth", "clock_aligner_ready", clock_aligner.ready)
def __init__(self, refclk, pads, sys_clk_freq, rtio_clk_freq, dw, mode):
assert (dw == 20) or (dw == 40)
assert mode in ["single", "master", "slave"]
self.mode = mode
# phase alignment
self.txsyncallin = Signal()
self.txphaligndone = Signal()
self.txsyncallin = Signal()
self.txsyncin = Signal()
self.txsyncout = Signal()
self.txdlysreset = Signal()
# # #
nwords = dw // 10
self.submodules.encoder = encoder = ClockDomainsRenamer("rtio_tx")(
Encoder(nwords, True))
self.submodules.decoders = decoders = [
ClockDomainsRenamer("rtio_rx")((Decoder(True)))
for _ in range(nwords)
]
self.rx_ready = Signal()
# transceiver direct clock outputs
# useful to specify clock constraints in a way palatable to Vivado
self.txoutclk = Signal()
self.rxoutclk = Signal()
# # #
# TX generates RTIO clock, init must be in system domain
self.submodules.tx_init = tx_init = GTHInit(sys_clk_freq, False, mode)
# RX receives restart commands from RTIO domain
rx_init = ClockDomainsRenamer("rtio_tx")(GTHInit(rtio_clk_freq, True))
self.submodules += rx_init
cpll_reset = Signal()
cpll_lock = Signal()
self.comb += [
cpll_reset.eq(tx_init.pllreset),
tx_init.plllock.eq(cpll_lock),
rx_init.plllock.eq(cpll_lock)
]
txdata = Signal(dw)
rxdata = Signal(dw)
rxphaligndone = Signal()
self.specials += \
Instance("GTHE3_CHANNEL",
# Reset modes
i_GTRESETSEL=0,
i_RESETOVRD=0,
# PMA Attributes
p_PMA_RSV1=0xf800,
p_RX_BIAS_CFG0=0x0AB4,
p_RX_CM_TRIM=0b1010,
p_RX_CLK25_DIV=5,
p_TX_CLK25_DIV=5,
# Power-Down Attributes
p_PD_TRANS_TIME_FROM_P2=0x3c,
p_PD_TRANS_TIME_NONE_P2=0x19,
p_PD_TRANS_TIME_TO_P2=0x64,
# CPLL
p_CPLL_CFG0=0x67f8,
p_CPLL_CFG1=0xa4ac,
p_CPLL_CFG2=0xf007,
p_CPLL_CFG3=0x0000,
p_CPLL_FBDIV=5,
p_CPLL_FBDIV_45=4,
p_CPLL_REFCLK_DIV=1,
p_RXOUT_DIV=2,
p_TXOUT_DIV=2,
i_CPLLRESET=0,
i_CPLLPD=cpll_reset,
o_CPLLLOCK=cpll_lock,
i_CPLLLOCKEN=1,
i_CPLLREFCLKSEL=0b001,
i_TSTIN=2**20-1,
i_GTREFCLK0=refclk,
# TX clock
p_TXBUF_EN="FALSE",
p_TX_XCLK_SEL="TXUSR",
o_TXOUTCLK=self.txoutclk,
i_TXSYSCLKSEL=0b00,
i_TXPLLCLKSEL=0b00,
i_TXOUTCLKSEL=0b11,
# TX Startup/Reset
i_GTTXRESET=tx_init.gtXxreset,
o_TXRESETDONE=tx_init.Xxresetdone,
i_TXDLYSRESET=tx_init.Xxdlysreset if mode != "slave" else self.txdlysreset,
o_TXDLYSRESETDONE=tx_init.Xxdlysresetdone,
o_TXPHALIGNDONE=tx_init.Xxphaligndone,
i_TXUSERRDY=tx_init.Xxuserrdy,
i_TXSYNCMODE=mode != "slave",
p_TXSYNC_MULTILANE=0 if mode == "single" else 1,
p_TXSYNC_OVRD=0,
i_TXSYNCALLIN=self.txsyncallin,
i_TXSYNCIN=self.txsyncin,
o_TXSYNCOUT=self.txsyncout,
# TX data
p_TX_DATA_WIDTH=dw,
p_TX_INT_DATAWIDTH=dw == 40,
i_TXCTRL0=Cat(*[txdata[10*i+8] for i in range(nwords)]),
i_TXCTRL1=Cat(*[txdata[10*i+9] for i in range(nwords)]),
i_TXDATA=Cat(*[txdata[10*i:10*i+8] for i in range(nwords)]),
i_TXUSRCLK=ClockSignal("rtio_tx"),
i_TXUSRCLK2=ClockSignal("rtio_tx"),
# TX electrical
i_TXPD=0b00,
p_TX_CLKMUX_EN=1,
i_TXBUFDIFFCTRL=0b000,
i_TXDIFFCTRL=0b1100,
# RX Startup/Reset
i_GTRXRESET=rx_init.gtXxreset,
o_RXRESETDONE=rx_init.Xxresetdone,
i_RXDLYSRESET=rx_init.Xxdlysreset,
o_RXPHALIGNDONE=rxphaligndone,
i_RXSYNCALLIN=rxphaligndone,
i_RXUSERRDY=rx_init.Xxuserrdy,
i_RXSYNCIN=0,
i_RXSYNCMODE=1,
o_RXSYNCDONE=rx_init.Xxsyncdone,
# RX AFE
i_RXDFEAGCCTRL=1,
i_RXDFEXYDEN=1,
i_RXLPMEN=1,
i_RXOSINTCFG=0xd,
i_RXOSINTEN=1,
# RX clock
i_RXRATE=0,
i_RXDLYBYPASS=0,
p_RXBUF_EN="FALSE",
p_RX_XCLK_SEL="RXUSR",
i_RXSYSCLKSEL=0b00,
i_RXOUTCLKSEL=0b010,
i_RXPLLCLKSEL=0b00,
o_RXOUTCLK=self.rxoutclk,
i_RXUSRCLK=ClockSignal("rtio_rx"),
i_RXUSRCLK2=ClockSignal("rtio_rx"),
# RX Clock Correction Attributes
p_CLK_CORRECT_USE="FALSE",
p_CLK_COR_SEQ_1_1=0b0100000000,
p_CLK_COR_SEQ_2_1=0b0100000000,
p_CLK_COR_SEQ_1_ENABLE=0b1111,
p_CLK_COR_SEQ_2_ENABLE=0b1111,
# RX data
p_RX_DATA_WIDTH=dw,
p_RX_INT_DATAWIDTH=dw == 40,
o_RXCTRL0=Cat(*[rxdata[10*i+8] for i in range(nwords)]),
o_RXCTRL1=Cat(*[rxdata[10*i+9] for i in range(nwords)]),
o_RXDATA=Cat(*[rxdata[10*i:10*i+8] for i in range(nwords)]),
# RX electrical
i_RXPD=0b00,
p_RX_CLKMUX_EN=1,
i_RXELECIDLEMODE=0b11,
# Pads
i_GTHRXP=pads.rxp,
i_GTHRXN=pads.rxn,
o_GTHTXP=pads.txp,
o_GTHTXN=pads.txn
)
self.comb += self.txphaligndone.eq(tx_init.Xxphaligndone)
self.submodules += [
add_probe_async("drtio_gth", "cpll_lock", cpll_lock),
add_probe_async("drtio_gth", "txuserrdy", tx_init.Xxuserrdy),
add_probe_async("drtio_gth", "tx_init_done", tx_init.done),
add_probe_async("drtio_gth", "rxuserrdy", rx_init.Xxuserrdy),
add_probe_async("drtio_gth", "rx_init_done", rx_init.done),
add_probe_buffer("drtio_gth",
"txdata",
txdata,
clock_domain="rtio_tx"),
add_probe_buffer("drtio_gth",
"rxdata",
rxdata,
clock_domain="rtio_rx")
]
# tx clocking
tx_reset_deglitched = Signal()
tx_reset_deglitched.attr.add("no_retiming")
self.sync += tx_reset_deglitched.eq(~tx_init.done)
self.clock_domains.cd_rtio_tx = ClockDomain()
if mode == "master" or mode == "single":
self.specials += \
Instance("BUFG_GT", i_I=self.txoutclk, o_O=self.cd_rtio_tx.clk, i_DIV=0)
self.specials += AsyncResetSynchronizer(self.cd_rtio_tx,
tx_reset_deglitched)
# rx clocking
rx_reset_deglitched = Signal()
rx_reset_deglitched.attr.add("no_retiming")
self.sync.rtio_tx += rx_reset_deglitched.eq(~rx_init.done)
self.clock_domains.cd_rtio_rx = ClockDomain()
self.specials += [
Instance("BUFG_GT", i_I=self.rxoutclk, o_O=self.cd_rtio_rx.clk),
AsyncResetSynchronizer(self.cd_rtio_rx, rx_reset_deglitched)
]
# tx data
self.comb += txdata.eq(Cat(*[encoder.output[i]
for i in range(nwords)]))
# rx data
for i in range(nwords):
self.comb += decoders[i].input.eq(rxdata[10 * i:10 * (i + 1)])
# clock alignment
clock_aligner = BruteforceClockAligner(0b0101111100, rtio_clk_freq)
self.submodules += clock_aligner
self.comb += [
clock_aligner.rxdata.eq(rxdata),
rx_init.restart.eq(clock_aligner.restart),
self.rx_ready.eq(clock_aligner.ready)
]
self.submodules += add_probe_async("drtio_gth", "clock_aligner_ready",
clock_aligner.ready)
def __init__(self, pll, pads, mode="master"):
self.tx_k = Signal(4)
self.tx_d = Signal(32)
self.rx_k = Signal(4)
self.rx_d = Signal(32)
self.tx_idle = Signal()
self.tx_comma = Signal()
self.rx_idle = Signal()
self.rx_comma = Signal()
self.rx_bitslip_value = Signal(6)
self.rx_delay_rst = Signal()
self.rx_delay_inc = Signal()
self.rx_delay_ce = Signal()
self.rx_delay_en_vtc = Signal()
# # #
self.submodules.encoder = ClockDomainsRenamer("serwb_serdes")(
Encoder(4, True))
self.decoders = [ClockDomainsRenamer("serwb_serdes")(
Decoder(True)) for _ in range(4)]
self.submodules += self.decoders
# clocking:
# In master mode:
# - linerate/10 pll refclk provided by user
# - linerate/10 slave refclk generated on clk_pads
# In Slave mode:
# - linerate/10 pll refclk provided by clk_pads
self.clock_domains.cd_serwb_serdes = ClockDomain()
self.clock_domains.cd_serwb_serdes_5x = ClockDomain()
self.clock_domains.cd_serwb_serdes_20x = ClockDomain(reset_less=True)
self.comb += [
self.cd_serwb_serdes.clk.eq(pll.serwb_serdes_clk),
self.cd_serwb_serdes_5x.clk.eq(pll.serwb_serdes_5x_clk),
self.cd_serwb_serdes_20x.clk.eq(pll.serwb_serdes_20x_clk)
]
self.specials += AsyncResetSynchronizer(self.cd_serwb_serdes, ~pll.lock)
self.comb += self.cd_serwb_serdes_5x.rst.eq(self.cd_serwb_serdes.rst)
# control/status cdc
tx_idle = Signal()
tx_comma = Signal()
rx_idle = Signal()
rx_comma = Signal()
rx_bitslip_value = Signal(6)
rx_delay_rst = Signal()
rx_delay_inc = Signal()
rx_delay_en_vtc = Signal()
rx_delay_ce = Signal()
self.specials += [
MultiReg(self.tx_idle, tx_idle, "serwb_serdes"),
MultiReg(self.tx_comma, tx_comma, "serwb_serdes"),
MultiReg(rx_idle, self.rx_idle, "sys"),
MultiReg(rx_comma, self.rx_comma, "sys"),
MultiReg(self.rx_bitslip_value, rx_bitslip_value, "serwb_serdes"),
MultiReg(self.rx_delay_inc, rx_delay_inc, "serwb_serdes_5x"),
MultiReg(self.rx_delay_en_vtc, rx_delay_en_vtc, "serwb_serdes_5x")
]
self.submodules.do_rx_delay_rst = PulseSynchronizer("sys", "serwb_serdes_5x")
self.comb += [
rx_delay_rst.eq(self.do_rx_delay_rst.o),
self.do_rx_delay_rst.i.eq(self.rx_delay_rst)
]
self.submodules.do_rx_delay_ce = PulseSynchronizer("sys", "serwb_serdes_5x")
self.comb += [
rx_delay_ce.eq(self.do_rx_delay_ce.o),
self.do_rx_delay_ce.i.eq(self.rx_delay_ce)
]
# tx clock (linerate/10)
if mode == "master":
self.submodules.tx_clk_gearbox = Gearbox(40, "serwb_serdes", 8, "serwb_serdes_5x")
self.comb += self.tx_clk_gearbox.i.eq((0b1111100000 << 30) |
(0b1111100000 << 20) |
(0b1111100000 << 10) |
(0b1111100000 << 0))
clk_o = Signal()
self.specials += [
Instance("OSERDESE3",
p_DATA_WIDTH=8, p_INIT=0,
p_IS_CLK_INVERTED=0, p_IS_CLKDIV_INVERTED=0, p_IS_RST_INVERTED=0,
o_OQ=clk_o,
i_RST=ResetSignal("serwb_serdes"),
i_CLK=ClockSignal("serwb_serdes_20x"), i_CLKDIV=ClockSignal("serwb_serdes_5x"),
i_D=self.tx_clk_gearbox.o
),
Instance("OBUFDS",
i_I=clk_o,
o_O=pads.clk_p,
o_OB=pads.clk_n
)
]
# tx datapath
# tx_data -> encoders -> gearbox -> serdes
self.submodules.tx_gearbox = Gearbox(40, "serwb_serdes", 8, "serwb_serdes_5x")
self.comb += [
If(tx_comma,
self.encoder.k[0].eq(1),
self.encoder.d[0].eq(0xbc)
).Else(
self.encoder.k[0].eq(self.tx_k[0]),
self.encoder.k[1].eq(self.tx_k[1]),
self.encoder.k[2].eq(self.tx_k[2]),
self.encoder.k[3].eq(self.tx_k[3]),
self.encoder.d[0].eq(self.tx_d[0:8]),
self.encoder.d[1].eq(self.tx_d[8:16]),
self.encoder.d[2].eq(self.tx_d[16:24]),
self.encoder.d[3].eq(self.tx_d[24:32])
)
]
self.sync.serwb_serdes += \
If(tx_idle,
self.tx_gearbox.i.eq(0)
).Else(
self.tx_gearbox.i.eq(Cat(*[self.encoder.output[i] for i in range(4)]))
)
serdes_o = Signal()
self.specials += [
Instance("OSERDESE3",
p_DATA_WIDTH=8, p_INIT=0,
p_IS_CLK_INVERTED=0, p_IS_CLKDIV_INVERTED=0, p_IS_RST_INVERTED=0,
o_OQ=serdes_o,
i_RST=ResetSignal("serwb_serdes"),
i_CLK=ClockSignal("serwb_serdes_20x"), i_CLKDIV=ClockSignal("serwb_serdes_5x"),
i_D=self.tx_gearbox.o
),
Instance("OBUFDS",
i_I=serdes_o,
o_O=pads.tx_p,
o_OB=pads.tx_n
)
]
# rx clock
use_bufr = True
if mode == "slave":
clk_i = Signal()
clk_i_bufg = Signal()
self.specials += [
Instance("IBUFDS",
i_I=pads.clk_p,
i_IB=pads.clk_n,
o_O=clk_i
)
]
if use_bufr:
clk_i_bufr = Signal()
self.specials += [
Instance("BUFR", i_I=clk_i, o_O=clk_i_bufr),
Instance("BUFG", i_I=clk_i_bufr, o_O=clk_i_bufg)
]
else:
self.specials += Instance("BUFG", i_I=clk_i, o_O=clk_i_bufg)
self.comb += pll.refclk.eq(clk_i_bufg)
# rx datapath
# serdes -> gearbox -> bitslip -> decoders -> rx_data
self.submodules.rx_gearbox = Gearbox(8, "serwb_serdes_5x", 40, "serwb_serdes")
self.submodules.rx_bitslip = ClockDomainsRenamer("serwb_serdes")(BitSlip(40))
serdes_i_nodelay = Signal()
self.specials += [
Instance("IBUFDS_DIFF_OUT",
i_I=pads.rx_p,
i_IB=pads.rx_n,
o_O=serdes_i_nodelay
)
]
serdes_i_delayed = Signal()
serdes_q = Signal(8)
self.specials += [
Instance("IDELAYE3",
p_CASCADE="NONE", p_UPDATE_MODE="ASYNC", p_REFCLK_FREQUENCY=200.0,
p_IS_CLK_INVERTED=0, p_IS_RST_INVERTED=0,
p_DELAY_FORMAT="COUNT", p_DELAY_SRC="IDATAIN",
p_DELAY_TYPE="VARIABLE", p_DELAY_VALUE=0,
i_CLK=ClockSignal("serwb_serdes_5x"),
i_RST=rx_delay_rst, i_LOAD=0,
i_INC=rx_delay_inc, i_EN_VTC=rx_delay_en_vtc,
i_CE=rx_delay_ce,
i_IDATAIN=serdes_i_nodelay, o_DATAOUT=serdes_i_delayed
),
Instance("ISERDESE3",
p_IS_CLK_INVERTED=0,
p_IS_CLK_B_INVERTED=1,
p_DATA_WIDTH=8,
i_D=serdes_i_delayed,
i_RST=ResetSignal("serwb_serdes"),
i_FIFO_RD_CLK=0, i_FIFO_RD_EN=0,
i_CLK=ClockSignal("serwb_serdes_20x"),
i_CLK_B=ClockSignal("serwb_serdes_20x"), # locally inverted
i_CLKDIV=ClockSignal("serwb_serdes_5x"),
o_Q=serdes_q
)
]
self.comb += [
self.rx_gearbox.i.eq(serdes_q),
self.rx_bitslip.value.eq(rx_bitslip_value),
self.rx_bitslip.i.eq(self.rx_gearbox.o),
self.decoders[0].input.eq(self.rx_bitslip.o[0:10]),
self.decoders[1].input.eq(self.rx_bitslip.o[10:20]),
self.decoders[2].input.eq(self.rx_bitslip.o[20:30]),
self.decoders[3].input.eq(self.rx_bitslip.o[30:40]),
self.rx_k.eq(Cat(*[self.decoders[i].k for i in range(4)])),
self.rx_d.eq(Cat(*[self.decoders[i].d for i in range(4)])),
rx_idle.eq(self.rx_bitslip.o == 0),
rx_comma.eq(((self.decoders[0].d == 0xbc) & (self.decoders[0].k == 1)) &
((self.decoders[1].d == 0x00) & (self.decoders[1].k == 0)) &
((self.decoders[2].d == 0x00) & (self.decoders[2].k == 0)) &
((self.decoders[3].d == 0x00) & (self.decoders[3].k == 0)))
]
def __init__(self,
refclk,
pads,
sys_clk_freq,
rtio_clk_freq=125e6,
tx_mode="single",
rx_mode="single"):
assert tx_mode in ["single", "master", "slave"]
assert rx_mode in ["single", "master", "slave"]
self.txenable = Signal()
self.submodules.encoder = ClockDomainsRenamer("rtio_tx")(Encoder(
2, True))
self.submodules.decoders = [
ClockDomainsRenamer("rtio_rx")((Decoder(True))) for _ in range(2)
]
self.rx_ready = Signal()
# transceiver direct clock outputs
# useful to specify clock constraints in a way palatable to Vivado
self.txoutclk = Signal()
self.rxoutclk = Signal()
# # #
cpllreset = Signal()
cplllock = Signal()
# TX generates RTIO clock, init must be in system domain
self.submodules.tx_init = tx_init = GTXInit(sys_clk_freq,
False,
mode=tx_mode)
# RX receives restart commands from RTIO domain
self.submodules.rx_init = rx_init = ClockDomainsRenamer("rtio_tx")(
GTXInit(rtio_clk_freq, True, mode=rx_mode))
self.comb += [
cpllreset.eq(tx_init.cpllreset),
tx_init.cplllock.eq(cplllock),
rx_init.cplllock.eq(cplllock)
]
txdata = Signal(20)
rxdata = Signal(20)
# Note: the following parameters were set after consulting AR45360
self.specials += \
Instance("GTXE2_CHANNEL",
# PMA Attributes
p_PMA_RSV=0x00018480,
p_PMA_RSV2=0x2050, # PMA_RSV2[5] = 0: Eye scan feature disabled
p_PMA_RSV3=0,
p_PMA_RSV4=1, # PMA_RSV[4],RX_CM_TRIM[2:0] = 0b1010: Common mode 800mV
p_RX_BIAS_CFG=0b000000000100,
p_RX_OS_CFG=0b0000010000000,
p_RX_CLK25_DIV=5,
p_TX_CLK25_DIV=5,
# Power-Down Attributes
p_PD_TRANS_TIME_FROM_P2=0x3c,
p_PD_TRANS_TIME_NONE_P2=0x3c,
p_PD_TRANS_TIME_TO_P2=0x64,
# CPLL
p_CPLL_CFG=0xBC07DC,
p_CPLL_FBDIV=4,
p_CPLL_FBDIV_45=5,
p_CPLL_REFCLK_DIV=1,
p_RXOUT_DIV=2,
p_TXOUT_DIV=2,
i_CPLLRESET=cpllreset,
i_CPLLPD=cpllreset,
o_CPLLLOCK=cplllock,
i_CPLLLOCKEN=1,
i_CPLLREFCLKSEL=0b001,
i_TSTIN=2**20-1,
i_GTREFCLK0=refclk,
# TX clock
p_TXBUF_EN="FALSE",
p_TX_XCLK_SEL="TXUSR",
o_TXOUTCLK=self.txoutclk,
i_TXSYSCLKSEL=0b00,
i_TXOUTCLKSEL=0b11,
# TX Startup/Reset
i_TXPHDLYRESET=0,
i_TXDLYBYPASS=0,
i_TXPHALIGNEN=1 if tx_mode != "single" else 0,
i_GTTXRESET=tx_init.gtXxreset,
o_TXRESETDONE=tx_init.Xxresetdone,
i_TXDLYSRESET=tx_init.Xxdlysreset,
o_TXDLYSRESETDONE=tx_init.Xxdlysresetdone,
i_TXPHINIT=tx_init.txphinit if tx_mode != "single" else 0,
o_TXPHINITDONE=tx_init.txphinitdone if tx_mode != "single" else Signal(),
i_TXPHALIGN=tx_init.Xxphalign if tx_mode != "single" else 0,
i_TXDLYEN=tx_init.Xxdlyen if tx_mode != "single" else 0,
o_TXPHALIGNDONE=tx_init.Xxphaligndone,
i_TXUSERRDY=tx_init.Xxuserrdy,
p_TXPMARESET_TIME=1,
p_TXPCSRESET_TIME=1,
i_TXINHIBIT=~self.txenable,
# TX data
p_TX_DATA_WIDTH=20,
p_TX_INT_DATAWIDTH=0,
i_TXCHARDISPMODE=Cat(txdata[9], txdata[19]),
i_TXCHARDISPVAL=Cat(txdata[8], txdata[18]),
i_TXDATA=Cat(txdata[:8], txdata[10:18]),
i_TXUSRCLK=ClockSignal("rtio_tx"),
i_TXUSRCLK2=ClockSignal("rtio_tx"),
# TX electrical
i_TXBUFDIFFCTRL=0b100,
i_TXDIFFCTRL=0b1000,
# RX Startup/Reset
i_RXPHDLYRESET=0,
i_RXDLYBYPASS=0,
i_RXPHALIGNEN=1 if rx_mode != "single" else 0,
i_GTRXRESET=rx_init.gtXxreset,
o_RXRESETDONE=rx_init.Xxresetdone,
i_RXDLYSRESET=rx_init.Xxdlysreset,
o_RXDLYSRESETDONE=rx_init.Xxdlysresetdone,
i_RXPHALIGN=rx_init.Xxphalign if rx_mode != "single" else 0,
i_RXDLYEN=rx_init.Xxdlyen if rx_mode != "single" else 0,
o_RXPHALIGNDONE=rx_init.Xxphaligndone,
i_RXUSERRDY=rx_init.Xxuserrdy,
p_RXPMARESET_TIME=1,
p_RXPCSRESET_TIME=1,
# RX AFE
p_RX_DFE_XYD_CFG=0,
p_RX_CM_SEL=0b11, # RX_CM_SEL = 0b11: Common mode is programmable
p_RX_CM_TRIM=0b010, # PMA_RSV[4],RX_CM_TRIM[2:0] = 0b1010: Common mode 800mV
i_RXDFEXYDEN=1,
i_RXDFEXYDHOLD=0,
i_RXDFEXYDOVRDEN=0,
i_RXLPMEN=0, # RXLPMEN = 0: DFE mode is enabled
p_RX_DFE_GAIN_CFG=0x0207EA,
p_RX_DFE_VP_CFG=0b00011111100000011,
p_RX_DFE_UT_CFG=0b10001000000000000,
p_RX_DFE_KL_CFG=0b0000011111110,
p_RX_DFE_KL_CFG2=0x3788140A,
p_RX_DFE_H2_CFG=0b000110000000,
p_RX_DFE_H3_CFG=0b000110000000,
p_RX_DFE_H4_CFG=0b00011100000,
p_RX_DFE_H5_CFG=0b00011100000,
p_RX_DFE_LPM_CFG=0x0904, # RX_DFE_LPM_CFG = 0x0904: linerate <= 6.6Gb/s
# = 0x0104: linerate > 6.6Gb/s
# RX clock
i_RXDDIEN=1,
i_RXSYSCLKSEL=0b00,
i_RXOUTCLKSEL=0b010,
o_RXOUTCLK=self.rxoutclk,
i_RXUSRCLK=ClockSignal("rtio_rx"),
i_RXUSRCLK2=ClockSignal("rtio_rx"),
# RX Clock Correction Attributes
p_CLK_CORRECT_USE="FALSE",
p_CLK_COR_SEQ_1_1=0b0100000000,
p_CLK_COR_SEQ_2_1=0b0100000000,
p_CLK_COR_SEQ_1_ENABLE=0b1111,
p_CLK_COR_SEQ_2_ENABLE=0b1111,
# RX data
p_RX_DATA_WIDTH=20,
p_RX_INT_DATAWIDTH=0,
o_RXDISPERR=Cat(rxdata[9], rxdata[19]),
o_RXCHARISK=Cat(rxdata[8], rxdata[18]),
o_RXDATA=Cat(rxdata[:8], rxdata[10:18]),
# 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="FALSE",
p_RXSLIDE_AUTO_WAIT=7,
p_RXSLIDE_MODE="PCS",
p_RX_SIG_VALID_DLY=10,
# RX 8B/10B Decoder Attributes
p_RX_DISPERR_SEQ_MATCH="FALSE",
p_DEC_MCOMMA_DETECT="TRUE",
p_DEC_PCOMMA_DETECT="TRUE",
p_DEC_VALID_COMMA_ONLY="FALSE",
# RX Buffer Attributes
p_RXBUF_ADDR_MODE="FAST",
p_RXBUF_EIDLE_HI_CNT=0b1000,
p_RXBUF_EIDLE_LO_CNT=0b0000,
p_RXBUF_EN="FALSE",
p_RX_BUFFER_CFG=0b000000,
p_RXBUF_RESET_ON_CB_CHANGE="TRUE",
p_RXBUF_RESET_ON_COMMAALIGN="FALSE",
p_RXBUF_RESET_ON_EIDLE="FALSE", # RXBUF_RESET_ON_EIDLE = FALSE: OOB is disabled
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="RXUSR",
p_RX_DDI_SEL=0b000000,
p_RX_DEFER_RESET_BUF_EN="TRUE",
# CDR Attributes
p_RXCDR_CFG=0x03000023FF20400020, # DFE @ <= 6.6Gb/s, scrambled, CDR setting < +/- 200ppm
# (See UG476 (v1.12.1), p.206)
p_RXCDR_FR_RESET_ON_EIDLE=0b0,
p_RXCDR_HOLD_DURING_EIDLE=0b0,
p_RXCDR_PH_RESET_ON_EIDLE=0b0,
p_RXCDR_LOCK_CFG=0b010101,
# Pads
i_GTXRXP=pads.rxp,
i_GTXRXN=pads.rxn,
o_GTXTXP=pads.txp,
o_GTXTXN=pads.txn,
# Other parameters
p_PCS_RSVD_ATTR=(
(tx_mode != "single") << 1 | # PCS_RSVD_ATTR[1] = 0: TX Single Lane Auto Mode
# = 1: TX Manual Mode
(rx_mode != "single") << 2 | # [2] = 0: RX Single Lane Auto Mode
# = 1: RX Manual Mode
0 << 8 # [8] = 0: OOB is disabled
),
i_RXELECIDLEMODE=0b11, # RXELECIDLEMODE = 0b11: OOB is disabled
p_RX_DFE_LPM_HOLD_DURING_EIDLE=0b0,
p_ES_EYE_SCAN_EN="TRUE", # Must be TRUE for GTX
)
# TX clocking
tx_reset_deglitched = Signal()
tx_reset_deglitched.attr.add("no_retiming")
self.sync += tx_reset_deglitched.eq(~tx_init.done)
self.clock_domains.cd_rtio_tx = ClockDomain()
if tx_mode == "single" or tx_mode == "master":
self.specials += Instance("BUFG",
i_I=self.txoutclk,
o_O=self.cd_rtio_tx.clk)
self.specials += AsyncResetSynchronizer(self.cd_rtio_tx,
tx_reset_deglitched)
# RX clocking
rx_reset_deglitched = Signal()
rx_reset_deglitched.attr.add("no_retiming")
self.sync.rtio += rx_reset_deglitched.eq(~rx_init.done)
self.clock_domains.cd_rtio_rx = ClockDomain()
if rx_mode == "single" or rx_mode == "master":
self.specials += Instance("BUFG",
i_I=self.rxoutclk,
o_O=self.cd_rtio_rx.clk),
self.specials += AsyncResetSynchronizer(self.cd_rtio_rx,
rx_reset_deglitched)
self.comb += [
txdata.eq(Cat(self.encoder.output[0], self.encoder.output[1])),
self.decoders[0].input.eq(rxdata[:10]),
self.decoders[1].input.eq(rxdata[10:])
]
clock_aligner = BruteforceClockAligner(0b0101111100, rtio_clk_freq)
self.submodules += clock_aligner
self.comb += [
clock_aligner.rxdata.eq(rxdata),
rx_init.restart.eq(clock_aligner.restart),
self.rx_ready.eq(clock_aligner.ready)
]
def __init__(self,
clock_pads,
tx_pads,
rx_pads,
sys_clk_freq,
clock_div2=False):
self.submodules.encoder = ClockDomainsRenamer("rtio")(Encoder(2, True))
self.decoders = [
ClockDomainsRenamer("rtio_rx")(Decoder(True)) for _ in range(2)
]
self.submodules += self.decoders
self.rx_ready = Signal()
# transceiver direct clock outputs
# useful to specify clock constraints in a way palatable to Vivado
self.txoutclk = Signal()
self.rxoutclk = Signal()
# # #
refclk = Signal()
if clock_div2:
self.specials += Instance("IBUFDS_GTE2",
i_CEB=0,
i_I=clock_pads.p,
i_IB=clock_pads.n,
o_ODIV2=refclk)
else:
self.specials += Instance("IBUFDS_GTE2",
i_CEB=0,
i_I=clock_pads.p,
i_IB=clock_pads.n,
o_O=refclk)
cplllock = Signal()
# TX generates RTIO clock, init must be in system domain
tx_init = GTXInit(sys_clk_freq, False)
# RX receives restart commands from RTIO domain
rx_init = ClockDomainsRenamer("rtio")(GTXInit(self.rtio_clk_freq,
True))
self.submodules += tx_init, rx_init
self.comb += tx_init.cplllock.eq(cplllock), \
rx_init.cplllock.eq(cplllock)
txdata = Signal(20)
rxdata = Signal(20)
self.specials += \
Instance("GTXE2_CHANNEL",
# PMA Attributes
p_PMA_RSV=0x00018480,
p_PMA_RSV2=0x2050,
p_PMA_RSV3=0,
p_PMA_RSV4=0,
p_RX_BIAS_CFG=0b100,
p_RX_CM_TRIM=0b010,
p_RX_OS_CFG=0b10000000,
p_RX_CLK25_DIV=5,
p_TX_CLK25_DIV=5,
# Power-Down Attributes
p_PD_TRANS_TIME_FROM_P2=0x3c,
p_PD_TRANS_TIME_NONE_P2=0x3c,
p_PD_TRANS_TIME_TO_P2=0x64,
# CPLL
p_CPLL_CFG=0xBC07DC,
p_CPLL_FBDIV=4,
p_CPLL_FBDIV_45=5,
p_CPLL_REFCLK_DIV=1,
p_RXOUT_DIV=2,
p_TXOUT_DIV=2,
o_CPLLLOCK=cplllock,
i_CPLLLOCKEN=1,
i_CPLLREFCLKSEL=0b001,
i_TSTIN=2**20-1,
i_GTREFCLK0=refclk,
# TX clock
p_TXBUF_EN="FALSE",
p_TX_XCLK_SEL="TXUSR",
o_TXOUTCLK=self.txoutclk,
i_TXSYSCLKSEL=0b00,
i_TXOUTCLKSEL=0b11,
# TX Startup/Reset
i_GTTXRESET=tx_init.gtXxreset,
o_TXRESETDONE=tx_init.Xxresetdone,
i_TXDLYSRESET=tx_init.Xxdlysreset,
o_TXDLYSRESETDONE=tx_init.Xxdlysresetdone,
o_TXPHALIGNDONE=tx_init.Xxphaligndone,
i_TXUSERRDY=tx_init.Xxuserrdy,
# TX data
p_TX_DATA_WIDTH=20,
p_TX_INT_DATAWIDTH=0,
i_TXCHARDISPMODE=Cat(txdata[9], txdata[19]),
i_TXCHARDISPVAL=Cat(txdata[8], txdata[18]),
i_TXDATA=Cat(txdata[:8], txdata[10:18]),
i_TXUSRCLK=ClockSignal("rtio"),
i_TXUSRCLK2=ClockSignal("rtio"),
# TX electrical
i_TXBUFDIFFCTRL=0b100,
i_TXDIFFCTRL=0b1000,
# RX Startup/Reset
i_GTRXRESET=rx_init.gtXxreset,
o_RXRESETDONE=rx_init.Xxresetdone,
i_RXDLYSRESET=rx_init.Xxdlysreset,
o_RXDLYSRESETDONE=rx_init.Xxdlysresetdone,
o_RXPHALIGNDONE=rx_init.Xxphaligndone,
i_RXUSERRDY=rx_init.Xxuserrdy,
# RX AFE
p_RX_DFE_XYD_CFG=0,
i_RXDFEXYDEN=1,
i_RXDFEXYDHOLD=0,
i_RXDFEXYDOVRDEN=0,
i_RXLPMEN=0,
# RX clock
p_RXBUF_EN="FALSE",
p_RX_XCLK_SEL="RXUSR",
i_RXDDIEN=1,
i_RXSYSCLKSEL=0b00,
i_RXOUTCLKSEL=0b010,
o_RXOUTCLK=self.rxoutclk,
i_RXUSRCLK=ClockSignal("rtio_rx"),
i_RXUSRCLK2=ClockSignal("rtio_rx"),
p_RXCDR_CFG=0x03000023FF10100020,
# RX Clock Correction Attributes
p_CLK_CORRECT_USE="FALSE",
p_CLK_COR_SEQ_1_1=0b0100000000,
p_CLK_COR_SEQ_2_1=0b0100000000,
p_CLK_COR_SEQ_1_ENABLE=0b1111,
p_CLK_COR_SEQ_2_ENABLE=0b1111,
# RX data
p_RX_DATA_WIDTH=20,
p_RX_INT_DATAWIDTH=0,
o_RXDISPERR=Cat(rxdata[9], rxdata[19]),
o_RXCHARISK=Cat(rxdata[8], rxdata[18]),
o_RXDATA=Cat(rxdata[:8], rxdata[10:18]),
# Pads
i_GTXRXP=rx_pads.p,
i_GTXRXN=rx_pads.n,
o_GTXTXP=tx_pads.p,
o_GTXTXN=tx_pads.n,
)
tx_reset_deglitched = Signal()
tx_reset_deglitched.attr.add("no_retiming")
self.sync += tx_reset_deglitched.eq(~tx_init.done)
self.clock_domains.cd_rtio = ClockDomain()
self.specials += [
Instance("BUFG", i_I=self.txoutclk, o_O=self.cd_rtio.clk),
AsyncResetSynchronizer(self.cd_rtio, tx_reset_deglitched)
]
rx_reset_deglitched = Signal()
rx_reset_deglitched.attr.add("no_retiming")
self.sync.rtio += rx_reset_deglitched.eq(~rx_init.done)
self.clock_domains.cd_rtio_rx = ClockDomain()
self.specials += [
Instance("BUFG", i_I=self.rxoutclk, o_O=self.cd_rtio_rx.clk),
AsyncResetSynchronizer(self.cd_rtio_rx, rx_reset_deglitched)
]
self.comb += [
txdata.eq(Cat(self.encoder.output[0], self.encoder.output[1])),
self.decoders[0].input.eq(rxdata[:10]),
self.decoders[1].input.eq(rxdata[10:])
]
clock_aligner = BruteforceClockAligner(0b0101111100,
self.rtio_clk_freq)
self.submodules += clock_aligner
self.comb += [
clock_aligner.rxdata.eq(rxdata),
rx_init.restart.eq(clock_aligner.restart),
self.rx_ready.eq(clock_aligner.ready)
]
def __init__(self, pads, mode="master"):
# Control
self.delay_rst = Signal()
self.delay_inc = Signal()
self.bitslip_value = bitslip_value = Signal(6)
# Status
self.idle = idle = Signal()
self.comma = comma = Signal()
# Datapath
self.ce = ce = Signal()
self.k = k = Signal(4)
self.d = d = Signal(32)
# # #
# Data input (DDR with sys4x)
data_nodelay = Signal()
data_delayed = Signal()
data_deserialized = Signal(8)
self.specials += [
DifferentialInput(pads.rx_p, pads.rx_n, data_nodelay),
Instance("IDELAYE2",
p_DELAY_SRC="IDATAIN",
p_SIGNAL_PATTERN="DATA",
p_CINVCTRL_SEL="FALSE",
p_HIGH_PERFORMANCE_MODE="TRUE",
p_REFCLK_FREQUENCY=200.0,
p_PIPE_SEL="FALSE",
p_IDELAY_TYPE="VARIABLE",
p_IDELAY_VALUE=0,
i_C=ClockSignal(),
i_LD=self.delay_rst,
i_CE=self.delay_inc,
i_LDPIPEEN=0,
i_INC=1,
i_IDATAIN=data_nodelay,
o_DATAOUT=data_delayed),
Instance("ISERDESE2",
p_DATA_WIDTH=8,
p_DATA_RATE="DDR",
p_SERDES_MODE="MASTER",
p_INTERFACE_TYPE="NETWORKING",
p_NUM_CE=1,
p_IOBDELAY="IFD",
i_DDLY=data_delayed,
i_CE1=1,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKB=~ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_BITSLIP=0,
o_Q8=data_deserialized[0],
o_Q7=data_deserialized[1],
o_Q6=data_deserialized[2],
o_Q5=data_deserialized[3],
o_Q4=data_deserialized[4],
o_Q3=data_deserialized[5],
o_Q2=data_deserialized[6],
o_Q1=data_deserialized[7])
]
# 8 --> 40 converter and bitslip
converter = stream.Converter(8, 40)
self.submodules += converter
bitslip = CEInserter()(BitSlip(40))
self.submodules += bitslip
self.comb += [
converter.sink.stb.eq(1),
converter.source.ack.eq(1),
# Enable pipeline when converter outputs the 40 bits
ce.eq(converter.source.stb),
# Connect input data to converter
converter.sink.data.eq(data_deserialized),
# Connect converter to bitslip
bitslip.ce.eq(ce),
bitslip.value.eq(bitslip_value),
bitslip.i.eq(converter.source.data)
]
# 8b10b decoder
self.submodules.decoders = decoders = [
CEInserter()(Decoder(True)) for _ in range(4)
]
self.comb += [decoders[i].ce.eq(ce) for i in range(4)]
self.comb += [
# Connect bitslip to decoder
decoders[0].input.eq(bitslip.o[0:10]),
decoders[1].input.eq(bitslip.o[10:20]),
decoders[2].input.eq(bitslip.o[20:30]),
decoders[3].input.eq(bitslip.o[30:40]),
# Connect decoder to output
self.k.eq(Cat(*[decoders[i].k for i in range(4)])),
self.d.eq(Cat(*[decoders[i].d for i in range(4)])),
]
# Status
idle_timer = WaitTimer(256)
self.submodules += idle_timer
self.comb += [
idle_timer.wait.eq(1),
self.idle.eq(idle_timer.done
& ((bitslip.o == 0) | (bitslip.o == (2**40 - 1)))),
self.comma.eq((decoders[0].k == 1) & (decoders[0].d == K(28, 5))
& (decoders[1].k == 0) & (decoders[1].d == 0)
& (decoders[2].k == 0) & (decoders[2].d == 0)
& (decoders[3].k == 0) & (decoders[3].d == 0))
]
def __init__(self, pads, mode="master"):
# Control
self.delay_rst = Signal()
self.delay_inc = Signal()
self.bitslip_value = bitslip_value = Signal(6)
# Status
self.idle = idle = Signal()
self.comma = comma = Signal()
# Datapath
self.ce = ce = Signal()
self.k = k = Signal(4)
self.d = d = Signal(32)
# # #
# Data input (DDR with sys4x)
data_nodelay = Signal()
data_delayed = Signal()
data_deserialized = Signal(8)
self.specials += [
DifferentialInput(pads.rx_p, pads.rx_n, data_nodelay),
Instance("IDELAYE3",
p_CASCADE="NONE", p_UPDATE_MODE="ASYNC", p_REFCLK_FREQUENCY=200.0,
p_IS_CLK_INVERTED=0, p_IS_RST_INVERTED=0,
p_DELAY_FORMAT="COUNT", p_DELAY_SRC="IDATAIN",
p_DELAY_TYPE="VARIABLE", p_DELAY_VALUE=0,
i_CLK=ClockSignal("sys"),
i_RST=self.delay_rst, i_LOAD=0,
i_INC=1, i_EN_VTC=0,
i_CE=self.delay_inc,
i_IDATAIN=data_nodelay, o_DATAOUT=data_delayed
),
Instance("ISERDESE3",
p_IS_CLK_INVERTED=0,
p_IS_CLK_B_INVERTED=1,
p_DATA_WIDTH=8,
i_D=data_delayed,
i_RST=ResetSignal("sys"),
i_FIFO_RD_CLK=0, i_FIFO_RD_EN=0,
i_CLK=ClockSignal("sys4x"),
i_CLK_B=ClockSignal("sys4x"), # locally inverted
i_CLKDIV=ClockSignal("sys"),
o_Q=data_deserialized
)
]
# 8 --> 40 converter and bitslip
converter = stream.Converter(8, 40)
self.submodules += converter
bitslip = CEInserter()(BitSlip(40))
self.submodules += bitslip
self.comb += [
converter.sink.stb.eq(1),
converter.source.ack.eq(1),
# Enable pipeline when converter outputs the 40 bits
ce.eq(converter.source.stb),
# Connect input data to converter
converter.sink.data.eq(data_deserialized),
# Connect converter to bitslip
bitslip.ce.eq(ce),
bitslip.value.eq(bitslip_value),
bitslip.i.eq(converter.source.data)
]
# 8b10b decoder
self.submodules.decoders = decoders = [CEInserter()(Decoder(True)) for _ in range(4)]
self.comb += [decoders[i].ce.eq(ce) for i in range(4)]
self.comb += [
# Connect bitslip to decoder
decoders[0].input.eq(bitslip.o[0:10]),
decoders[1].input.eq(bitslip.o[10:20]),
decoders[2].input.eq(bitslip.o[20:30]),
decoders[3].input.eq(bitslip.o[30:40]),
# Connect decoder to output
self.k.eq(Cat(*[decoders[i].k for i in range(4)])),
self.d.eq(Cat(*[decoders[i].d for i in range(4)])),
]
# Status
idle_timer = WaitTimer(256)
self.submodules += idle_timer
self.comb += [
idle_timer.wait.eq(1),
self.idle.eq(idle_timer.done &
((bitslip.o == 0) | (bitslip.o == (2**40-1)))),
self.comma.eq(
(decoders[0].k == 1) & (decoders[0].d == K(28,5)) &
(decoders[1].k == 0) & (decoders[1].d == 0) &
(decoders[2].k == 0) & (decoders[2].d == 0) &
(decoders[3].k == 0) & (decoders[3].d == 0))
]
def __init__(self, pads, mode="master"):
# Control
self.bitslip_value = bitslip_value = Signal(6)
# Status
self.idle = idle = Signal()
self.comma = comma = Signal()
# Datapath
self.ce = ce = Signal()
self.k = k = Signal(4)
self.d = d = Signal(32)
# # #
# Input data (on rising edge of sys_clk)
data = Signal()
data_d = Signal()
self.specials += DifferentialInput(pads.rx_p, pads.rx_n, data)
self.sync += data_d.eq(data)
# 1 --> 40 converter and bitslip
converter = stream.Converter(1, 40)
self.submodules += converter
bitslip = CEInserter()(BitSlip(40))
self.submodules += bitslip
self.comb += [
converter.sink.stb.eq(1),
converter.source.ack.eq(1),
# Enable pipeline when converter outputs the 40 bits
ce.eq(converter.source.stb),
# Connect input data to converter
converter.sink.data.eq(data),
# Connect converter to bitslip
bitslip.ce.eq(ce),
bitslip.value.eq(bitslip_value),
bitslip.i.eq(converter.source.data)
]
# 8b10b decoder
self.submodules.decoders = decoders = [CEInserter()(Decoder(True)) for _ in range(4)]
self.comb += [decoders[i].ce.eq(ce) for i in range(4)]
self.comb += [
# Connect bitslip to decoder
decoders[0].input.eq(bitslip.o[0:10]),
decoders[1].input.eq(bitslip.o[10:20]),
decoders[2].input.eq(bitslip.o[20:30]),
decoders[3].input.eq(bitslip.o[30:40]),
# Connect decoder to output
self.k.eq(Cat(*[decoders[i].k for i in range(4)])),
self.d.eq(Cat(*[decoders[i].d for i in range(4)])),
]
# Status
idle_timer = WaitTimer(256)
self.submodules += idle_timer
self.comb += [
idle_timer.wait.eq(1),
self.idle.eq(idle_timer.done &
((bitslip.o == 0) | (bitslip.o == (2**40-1)))),
self.comma.eq(
(decoders[0].k == 1) & (decoders[0].d == K(28,5)) &
(decoders[1].k == 0) & (decoders[1].d == 0) &
(decoders[2].k == 0) & (decoders[2].d == 0) &
(decoders[3].k == 0) & (decoders[3].d == 0))
]
def __init__(self, pads, mode="master"):
if mode == "slave":
self.refclk = Signal()
self.tx_ce = Signal()
self.tx_k = Signal(4)
self.tx_d = Signal(32)
self.rx_ce = Signal()
self.rx_k = Signal(4)
self.rx_d = Signal(32)
self.tx_idle = Signal()
self.tx_comma = Signal()
self.rx_idle = Signal()
self.rx_comma = Signal()
self.rx_bitslip_value = Signal(6)
self.rx_delay_rst = Signal()
self.rx_delay_inc = Signal()
self.rx_delay_en_vtc = Signal()
# # #
self.submodules.encoder = encoder = CEInserter()(Encoder(4, True))
self.comb += encoder.ce.eq(self.tx_ce)
self.submodules.decoders = decoders = [
CEInserter()(Decoder(True)) for _ in range(4)
]
self.comb += [decoders[i].ce.eq(self.rx_ce) for i in range(4)]
# clocking:
# In master mode:
# - linerate/10 refclk generated on clk_pads
# In Slave mode:
# - linerate/10 refclk provided by clk_pads
# tx clock (linerate/10)
if mode == "master":
clk_converter = stream.Converter(40, 8)
self.submodules += clk_converter
self.comb += [
clk_converter.sink.stb.eq(1),
clk_converter.sink.data.eq(
Replicate(Signal(10, reset=0b1111100000), 4)),
clk_converter.source.ack.eq(1)
]
clk_o = Signal()
self.specials += [
Instance("OSERDESE3",
p_DATA_WIDTH=8,
p_INIT=0,
p_IS_CLK_INVERTED=0,
p_IS_CLKDIV_INVERTED=0,
p_IS_RST_INVERTED=0,
o_OQ=clk_o,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_D=clk_converter.source.data),
Instance("OBUFDS", i_I=clk_o, o_O=pads.clk_p, o_OB=pads.clk_n)
]
# tx datapath
# tx_data -> encoders -> converter -> serdes
self.submodules.tx_converter = tx_converter = stream.Converter(40, 8)
self.comb += [
tx_converter.sink.stb.eq(1),
self.tx_ce.eq(tx_converter.sink.ack),
tx_converter.source.ack.eq(1),
If(self.tx_idle, tx_converter.sink.data.eq(0)).Else(
tx_converter.sink.data.eq(
Cat(*[encoder.output[i] for i in range(4)]))),
If(
self.tx_comma,
encoder.k[0].eq(1),
encoder.d[0].eq(K(28, 5)),
).Else(encoder.k[0].eq(self.tx_k[0]), encoder.k[1].eq(
self.tx_k[1]), encoder.k[2].eq(self.tx_k[2]),
encoder.k[3].eq(self.tx_k[3]),
encoder.d[0].eq(self.tx_d[0:8]),
encoder.d[1].eq(self.tx_d[8:16]),
encoder.d[2].eq(self.tx_d[16:24]),
encoder.d[3].eq(self.tx_d[24:32]))
]
serdes_o = Signal()
self.specials += [
Instance("OSERDESE3",
p_DATA_WIDTH=8,
p_INIT=0,
p_IS_CLK_INVERTED=0,
p_IS_CLKDIV_INVERTED=0,
p_IS_RST_INVERTED=0,
o_OQ=serdes_o,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_D=tx_converter.source.data),
Instance("OBUFDS", i_I=serdes_o, o_O=pads.tx_p, o_OB=pads.tx_n)
]
# rx clock
use_bufr = True
if mode == "slave":
clk_i = Signal()
clk_i_bufg = Signal()
self.specials += [
Instance("IBUFDS", i_I=pads.clk_p, i_IB=pads.clk_n, o_O=clk_i)
]
if use_bufr:
clk_i_bufr = Signal()
self.specials += [
Instance("BUFR", i_I=clk_i, o_O=clk_i_bufr),
Instance("BUFG", i_I=clk_i_bufr, o_O=clk_i_bufg)
]
else:
self.specials += Instance("BUFG", i_I=clk_i, o_O=clk_i_bufg)
self.comb += self.refclk.eq(clk_i_bufg)
# rx datapath
# serdes -> converter -> bitslip -> decoders -> rx_data
self.submodules.rx_converter = rx_converter = stream.Converter(8, 40)
self.comb += [
self.rx_ce.eq(rx_converter.source.stb),
rx_converter.source.ack.eq(1)
]
self.submodules.rx_bitslip = rx_bitslip = CEInserter()(BitSlip(40))
self.comb += rx_bitslip.ce.eq(self.rx_ce)
serdes_i_nodelay = Signal()
self.specials += [
Instance("IBUFDS_DIFF_OUT",
i_I=pads.rx_p,
i_IB=pads.rx_n,
o_O=serdes_i_nodelay)
]
serdes_i_delayed = Signal()
serdes_q = Signal(8)
self.specials += [
Instance("IDELAYE3",
p_CASCADE="NONE",
p_UPDATE_MODE="ASYNC",
p_REFCLK_FREQUENCY=200.0,
p_IS_CLK_INVERTED=0,
p_IS_RST_INVERTED=0,
p_DELAY_FORMAT="COUNT",
p_DELAY_SRC="IDATAIN",
p_DELAY_TYPE="VARIABLE",
p_DELAY_VALUE=0,
i_CLK=ClockSignal("sys"),
i_RST=self.rx_delay_rst,
i_LOAD=0,
i_INC=1,
i_EN_VTC=self.rx_delay_en_vtc,
i_CE=self.rx_delay_inc,
i_IDATAIN=serdes_i_nodelay,
o_DATAOUT=serdes_i_delayed),
Instance(
"ISERDESE3",
p_IS_CLK_INVERTED=0,
p_IS_CLK_B_INVERTED=1,
p_DATA_WIDTH=8,
i_D=serdes_i_delayed,
i_RST=ResetSignal("sys"),
i_FIFO_RD_CLK=0,
i_FIFO_RD_EN=0,
i_CLK=ClockSignal("sys4x"),
i_CLK_B=ClockSignal("sys4x"), # locally inverted
i_CLKDIV=ClockSignal("sys"),
o_Q=serdes_q)
]
self.comb += [
rx_converter.sink.stb.eq(1),
rx_converter.sink.data.eq(serdes_q),
rx_bitslip.value.eq(self.rx_bitslip_value),
rx_bitslip.i.eq(rx_converter.source.data),
decoders[0].input.eq(rx_bitslip.o[0:10]),
decoders[1].input.eq(rx_bitslip.o[10:20]),
decoders[2].input.eq(rx_bitslip.o[20:30]),
decoders[3].input.eq(rx_bitslip.o[30:40]),
self.rx_k.eq(Cat(*[decoders[i].k for i in range(4)])),
self.rx_d.eq(Cat(*[decoders[i].d for i in range(4)])),
self.rx_comma.eq((decoders[0].k == 1) & (decoders[0].d == K(28, 5))
& (decoders[1].k == 0) & (decoders[1].d == 0)
& (decoders[2].k == 0) & (decoders[2].d == 0)
& (decoders[3].k == 0) & (decoders[3].d == 0))
]
idle_timer = WaitTimer(32)
self.submodules += idle_timer
self.comb += idle_timer.wait.eq(1)
self.sync += self.rx_idle.eq(idle_timer.done & (rx_bitslip.o == 0))
def __init__(self, pads, mode="master"):
if mode == "slave":
self.refclk = Signal()
self.tx_ce = Signal()
self.tx_k = Signal(4)
self.tx_d = Signal(32)
self.rx_ce = Signal()
self.rx_k = Signal(4)
self.rx_d = Signal(32)
self.tx_idle = Signal()
self.tx_comma = Signal()
self.rx_idle = Signal()
self.rx_comma = Signal()
self.rx_bitslip_value = Signal(6)
self.rx_delay_rst = Signal()
self.rx_delay_inc = Signal()
# # #
self.submodules.encoder = encoder = CEInserter()(Encoder(4, True))
self.comb += encoder.ce.eq(self.tx_ce)
self.submodules.decoders = decoders = [
CEInserter()(Decoder(True)) for _ in range(4)
]
self.comb += [decoders[i].ce.eq(self.rx_ce) for i in range(4)]
# clocking:
# In Master mode:
# - linerate/10 refclk is generated on clk_pads
# In Slave mode:
# - linerate/10 refclk is provided by clk_pads
# tx clock (linerate/10)
if mode == "master":
clk_converter = stream.Converter(40, 8)
self.submodules += clk_converter
self.comb += [
clk_converter.sink.stb.eq(1),
clk_converter.sink.data.eq(
Replicate(Signal(10, reset=0b1111100000), 4)),
clk_converter.source.ack.eq(1)
]
clk_o = Signal()
self.specials += [
Instance("OSERDESE2",
p_DATA_WIDTH=8,
p_TRISTATE_WIDTH=1,
p_DATA_RATE_OQ="DDR",
p_DATA_RATE_TQ="BUF",
p_SERDES_MODE="MASTER",
o_OQ=clk_o,
i_OCE=1,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_D1=clk_converter.source.data[0],
i_D2=clk_converter.source.data[1],
i_D3=clk_converter.source.data[2],
i_D4=clk_converter.source.data[3],
i_D5=clk_converter.source.data[4],
i_D6=clk_converter.source.data[5],
i_D7=clk_converter.source.data[6],
i_D8=clk_converter.source.data[7]),
Instance("OBUFDS", i_I=clk_o, o_O=pads.clk_p, o_OB=pads.clk_n)
]
# tx datapath
# tx_data -> encoders -> converter -> serdes
self.submodules.tx_converter = tx_converter = stream.Converter(40, 8)
self.comb += [
tx_converter.sink.stb.eq(1),
self.tx_ce.eq(tx_converter.sink.ack),
tx_converter.source.ack.eq(1),
If(self.tx_idle, tx_converter.sink.data.eq(0)).Else(
tx_converter.sink.data.eq(
Cat(*[encoder.output[i] for i in range(4)]))),
If(
self.tx_comma,
encoder.k[0].eq(1),
encoder.d[0].eq(K(28, 5)),
).Else(encoder.k[0].eq(self.tx_k[0]), encoder.k[1].eq(
self.tx_k[1]), encoder.k[2].eq(self.tx_k[2]),
encoder.k[3].eq(self.tx_k[3]),
encoder.d[0].eq(self.tx_d[0:8]),
encoder.d[1].eq(self.tx_d[8:16]),
encoder.d[2].eq(self.tx_d[16:24]),
encoder.d[3].eq(self.tx_d[24:32]))
]
serdes_o = Signal()
self.specials += [
Instance("OSERDESE2",
p_DATA_WIDTH=8,
p_TRISTATE_WIDTH=1,
p_DATA_RATE_OQ="DDR",
p_DATA_RATE_TQ="BUF",
p_SERDES_MODE="MASTER",
o_OQ=serdes_o,
i_OCE=1,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_D1=tx_converter.source.data[0],
i_D2=tx_converter.source.data[1],
i_D3=tx_converter.source.data[2],
i_D4=tx_converter.source.data[3],
i_D5=tx_converter.source.data[4],
i_D6=tx_converter.source.data[5],
i_D7=tx_converter.source.data[6],
i_D8=tx_converter.source.data[7]),
Instance("OBUFDS", i_I=serdes_o, o_O=pads.tx_p, o_OB=pads.tx_n)
]
# rx clock
use_bufr = True
if mode == "slave":
clk_i = Signal()
clk_i_bufg = Signal()
self.specials += [
Instance("IBUFDS", i_I=pads.clk_p, i_IB=pads.clk_n, o_O=clk_i)
]
if use_bufr:
clk_i_bufr = Signal()
self.specials += [
Instance("BUFR", i_I=clk_i, o_O=clk_i_bufr),
Instance("BUFG", i_I=clk_i_bufr, o_O=clk_i_bufg)
]
else:
self.specials += Instance("BUFG", i_I=clk_i, o_O=clk_i_bufg)
self.comb += self.refclk.eq(clk_i_bufg)
# rx datapath
# serdes -> converter -> bitslip -> decoders -> rx_data
self.submodules.rx_converter = rx_converter = stream.Converter(8, 40)
self.comb += [
self.rx_ce.eq(rx_converter.source.stb),
rx_converter.source.ack.eq(1)
]
self.submodules.rx_bitslip = rx_bitslip = CEInserter()(BitSlip(40))
self.comb += rx_bitslip.ce.eq(self.rx_ce)
serdes_i_nodelay = Signal()
self.specials += [
Instance("IBUFDS_DIFF_OUT",
i_I=pads.rx_p,
i_IB=pads.rx_n,
o_O=serdes_i_nodelay)
]
serdes_i_delayed = Signal()
serdes_q = Signal(8)
self.specials += [
Instance("IDELAYE2",
p_DELAY_SRC="IDATAIN",
p_SIGNAL_PATTERN="DATA",
p_CINVCTRL_SEL="FALSE",
p_HIGH_PERFORMANCE_MODE="TRUE",
p_REFCLK_FREQUENCY=200.0,
p_PIPE_SEL="FALSE",
p_IDELAY_TYPE="VARIABLE",
p_IDELAY_VALUE=0,
i_C=ClockSignal(),
i_LD=self.rx_delay_rst,
i_CE=self.rx_delay_inc,
i_LDPIPEEN=0,
i_INC=1,
i_IDATAIN=serdes_i_nodelay,
o_DATAOUT=serdes_i_delayed),
Instance("ISERDESE2",
p_DATA_WIDTH=8,
p_DATA_RATE="DDR",
p_SERDES_MODE="MASTER",
p_INTERFACE_TYPE="NETWORKING",
p_NUM_CE=1,
p_IOBDELAY="IFD",
i_DDLY=serdes_i_delayed,
i_CE1=1,
i_RST=ResetSignal("sys"),
i_CLK=ClockSignal("sys4x"),
i_CLKB=~ClockSignal("sys4x"),
i_CLKDIV=ClockSignal("sys"),
i_BITSLIP=0,
o_Q8=serdes_q[0],
o_Q7=serdes_q[1],
o_Q6=serdes_q[2],
o_Q5=serdes_q[3],
o_Q4=serdes_q[4],
o_Q3=serdes_q[5],
o_Q2=serdes_q[6],
o_Q1=serdes_q[7])
]
self.comb += [
rx_converter.sink.stb.eq(1),
rx_converter.sink.data.eq(serdes_q),
rx_bitslip.value.eq(self.rx_bitslip_value),
rx_bitslip.i.eq(rx_converter.source.data),
decoders[0].input.eq(rx_bitslip.o[0:10]),
decoders[1].input.eq(rx_bitslip.o[10:20]),
decoders[2].input.eq(rx_bitslip.o[20:30]),
decoders[3].input.eq(rx_bitslip.o[30:40]),
self.rx_k.eq(Cat(*[decoders[i].k for i in range(4)])),
self.rx_d.eq(Cat(*[decoders[i].d for i in range(4)])),
self.rx_comma.eq((decoders[0].k == 1) & (decoders[0].d == K(28, 5))
& (decoders[1].k == 0) & (decoders[1].d == 0)
& (decoders[2].k == 0) & (decoders[2].d == 0)
& (decoders[3].k == 0) & (decoders[3].d == 0))
]
idle_timer = WaitTimer(32)
self.submodules += idle_timer
self.comb += idle_timer.wait.eq(1)
self.sync += self.rx_idle.eq(idle_timer.done & (rx_bitslip.o == 0))