#
# The ADI JESD204 Core is released under the following license, which is
# different than all other HDL cores in this repository.
#
# Please read this, and understand the freedoms and responsibilities you have
# by using this source code/core.
#
# The JESD204 HDL, is copyright © 2016-2017 Analog Devices Inc.
#
# This core is free software, you can use run, copy, study, change, ask
# questions about and improve this core. Distribution of source, or resulting
# binaries (including those inside an FPGA or ASIC) require you to release the
# source of the entire project (excluding the system libraries provide by the
# tools/compiler/FPGA vendor). These are the terms of the GNU General Public
# License version 2 as published by the Free Software Foundation.
#
# This core  is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License version 2
# along with this source code, and binary.  If not, see
# <http://www.gnu.org/licenses/>.
#
# Commercial licenses (with commercial support) of this JESD204 core are also
# available under terms different than the General Public License. (e.g. they
# do not require you to accompany any image (FPGA or ASIC) using the JESD204
# core with any corresponding source code.) For these alternate terms you must
# purchase a license from Analog Devices Technology Licensing Office. Users
# interested in such a license should contact jesd204-licensing@analog.com for
# more information. This commercial license is sub-licensable (if you purchase
# chips from Analog Devices, incorporate them into your PCB level product, and
# purchase a JESD204 license, end users of your product will also have a
# license to use this core in a commercial setting without releasing their
# source code).
#
# In addition, we kindly ask you to acknowledge ADI in any program, application
# or publication in which you use this JESD204 HDL core. (You are not required
# to do so; it is up to your common sense to decide whether you want to comply
# with this request or not.) For general publications, we suggest referencing :
# “The design and implementation of the JESD204 HDL Core used in this project
# is copyright © 2016-2017, Analog Devices, Inc.”
#

package require qsys
source ../../scripts/adi_env.tcl
source ../../scripts/adi_ip_alt.tcl

#
# Wrapper module that instantiates and connects all the components required to
# for a JESD204 link.
#
# The following components are created:
#   * Transceiver for each lane
#   * Transceiver lane PLL (TX only)
#   * Transceiver reset controller
#   * Link PLL
#   * JESD204 link layer processing
#   * JESD204 link layer processing control interface
#   * axi_adxcvr link management peripheral
#

ad_ip_create adi_jesd204 {Analog Devices JESD204}
set_module_property VALIDATION_CALLBACK jesd204_validate
set_module_property COMPOSITION_CALLBACK jesd204_compose

# parameters

ad_ip_parameter DEVICE_FAMILY STRING "" false {
  VISIBLE false
}

ad_ip_parameter DEVICE STRING "" false {
  SYSTEM_INFO DEVICE
  VISIBLE false
}

ad_ip_parameter TX_OR_RX_N BOOLEAN 0 false { \
  DISPLAY_HINT "radio" \
  DISPLAY_NAME "Data Path" \
  ALLOWED_RANGES { "0:Receive" "1:Transmit" }
}

ad_ip_parameter ID NATURAL 0 false { \
  DISPLAY_NAME "Core ID" \
}

ad_ip_parameter LANE_RATE FLOAT 10000 false { \
  DISPLAY_NAME "Lane Rate" \
  DISPLAY_UNITS "Mbps" \
}

ad_ip_parameter SYSCLK_FREQUENCY FLOAT 100.0 false { \
  DISPLAY_NAME "System Clock Frequency" \
  UNITS Megahertz
}

ad_ip_parameter REFCLK_FREQUENCY FLOAT 500.0 false { \
  DISPLAY_NAME "Reference Clock Frequency" \
  UNITS Megahertz \
}

ad_ip_parameter NUM_OF_LANES POSITIVE 4 false { \
  DISPLAY_NAME "Number of Lanes" \
  ALLOWED_RANGES 1:8
}

ad_ip_parameter LANE_MAP STRING "" false { \
  DISPLAY_NAME "Lane Mapping" \
}

ad_ip_parameter SOFT_PCS BOOLEAN true false { \
  DISPLAY_NAME "Enable Soft PCS" \
}

proc create_phy_reset_control {tx num_of_lanes sysclk_frequency} {
  add_instance phy_reset_control altera_xcvr_reset_control
  set_instance_property phy_reset_control SUPPRESS_ALL_WARNINGS true
  set_instance_parameter_value phy_reset_control {CHANNELS} $num_of_lanes
  set_instance_parameter_value phy_reset_control {SYS_CLK_IN_MHZ} $sysclk_frequency
  set_instance_parameter_value phy_reset_control {TX_PLL_ENABLE} $tx
  set_instance_parameter_value phy_reset_control {TX_ENABLE} $tx
  set_instance_parameter_value phy_reset_control {RX_ENABLE} [expr !$tx]
  set_instance_parameter_value phy_reset_control {SYNCHRONIZE_RESET} {0}
  add_connection sys_clock.clk phy_reset_control.clock
  add_connection link_reset.out_reset phy_reset_control.reset
  add_connection sys_clock.clk_reset phy_reset_control.reset

  if {$tx} {
    set_instance_parameter_value phy_reset_control {T_PLL_POWERDOWN} {1000}
    set_instance_parameter_value phy_reset_control {gui_pll_cal_busy} {1}
    set_instance_parameter_value phy_reset_control {T_TX_ANALOGRESET} {70000}
    set_instance_parameter_value phy_reset_control {T_TX_DIGITALRESET} {70000}

    add_connection phy_reset_control.tx_ready axi_xcvr.ready
  } else {
    set_instance_parameter_value phy_reset_control {T_RX_ANALOGRESET} {70000}
    set_instance_parameter_value phy_reset_control {T_RX_DIGITALRESET} {4000}

    add_connection phy_reset_control.rx_ready axi_xcvr.ready
  }
}

proc create_lane_pll {id pllclk_frequency refclk_frequency} {
  add_instance lane_pll altera_xcvr_atx_pll_a10
  set_instance_property lane_pll SUPPRESS_ALL_INFO_MESSAGES true
  set_instance_parameter_value lane_pll {enable_pll_reconfig} {1}
  set_instance_parameter_value lane_pll {rcfg_separate_avmm_busy} {1}
  set_instance_parameter_value lane_pll {set_capability_reg_enable} {1}
  set_instance_parameter_value lane_pll {set_user_identifier} $id
  set_instance_parameter_value lane_pll {set_csr_soft_logic_enable} {1}
  set_instance_parameter_value lane_pll {set_output_clock_frequency} $pllclk_frequency
  set_instance_parameter_value lane_pll {set_auto_reference_clock_frequency} $refclk_frequency
  add_connection phy_reset_control.pll_powerdown lane_pll.pll_powerdown
  add_connection lane_pll.pll_locked phy_reset_control.pll_locked
  add_connection lane_pll.pll_cal_busy phy_reset_control.pll_cal_busy
  add_connection ref_clock.out_clk lane_pll.pll_refclk0
  add_connection sys_clock.clk lane_pll.reconfig_clk0
  add_connection sys_clock.clk_reset lane_pll.reconfig_reset0
  add_interface lane_pll_reconfig avalon slave
  set_interface_property lane_pll_reconfig EXPORT_OF lane_pll.reconfig_avmm0
}

proc jesd204_get_max_lane_rate {device soft_pcs} {
  if {[string range $device 0 2] == "10A"} {
    set device_speedgrade [string range $device 13 13]
    set pma_speedgrade [string range $device 8 8]
  } else {
    # Assume fastest speed grade
    set device_speedgrade 1
    set pma_speedgrade 1
  }

  if {$soft_pcs} {
    if {$pma_speedgrade == 1 || $pma_speedgrade == 2} {
      return "15000"
    } elseif {$pma_speedgrade == 3} {
      return "14200"
    } else {
      return "12500"
    }
  } else {
    if {$device_speedgrade == 1} {
      return "12000"
    } elseif {$device_speedgrade == 2} {
      return "9830"
    } else {
      return "8936"
    }
  }
}

proc jesd204_validate {{quiet false}} {
  set soft_pcs [get_parameter_value "SOFT_PCS"]
  set device_family [get_parameter_value "DEVICE_FAMILY"]
  set device [get_parameter_value "DEVICE"]
  set lane_rate [get_parameter_value "LANE_RATE"]

  if {$device_family != "Arria 10"} {
    if {!$quiet} {
      send_message error "Only Arria 10 is supported."
    }
    return false
  }

  set max_lane_rate [jesd204_get_max_lane_rate $device $soft_pcs]

  if {$lane_rate < 2000 || $lane_rate > $max_lane_rate} {
    if {!$quiet} {
      send_message error "Lane rate must be in the range 2000-${max_lane_rate} Mbps."
      if {!$soft_pcs} {
        send_message error "Consider enabling soft PCS for a higher maximum lane rate."
      }
    }
    return false
  }

  return true
}

proc jesd204_compose {} {
  set id [get_parameter_value "ID"]
  set lane_rate [get_parameter_value "LANE_RATE"]
  set tx_or_rx_n [get_parameter_value "TX_OR_RX_N"]
  set num_of_lanes [get_parameter_value "NUM_OF_LANES"]
  set sysclk_frequency [get_parameter_value "SYSCLK_FREQUENCY"]
  set refclk_frequency [get_parameter_value "REFCLK_FREQUENCY"]
  set lane_map [get_parameter_value "LANE_MAP"]
  set soft_pcs [get_parameter_value "SOFT_PCS"]
  set device_family [get_parameter_value "DEVICE_FAMILY"]
  set device [get_parameter_value "DEVICE"]

  set pllclk_frequency [expr $lane_rate / 2]
  set linkclk_frequency [expr $lane_rate / 40]

  if {![jesd204_validate true]} {
    return
  }

  add_instance sys_clock clock_source
  set_instance_parameter_value sys_clock {clockFrequency} [expr $sysclk_frequency*1000000]
  set_instance_parameter_value sys_clock {resetSynchronousEdges} {deassert}
  add_interface sys_clk clock sink
  set_interface_property sys_clk EXPORT_OF sys_clock.clk_in
  add_interface sys_resetn reset sink
  set_interface_property sys_resetn EXPORT_OF sys_clock.clk_in_reset

  add_instance ref_clock altera_clock_bridge
  set_instance_parameter_value ref_clock {EXPLICIT_CLOCK_RATE} [expr $refclk_frequency*1000000]
  add_interface ref_clk clock sink
  set_interface_property ref_clk EXPORT_OF ref_clock.in_clk

  # FIXME: In phase alignment mode manual re-calibration fails
  add_instance link_pll altera_xcvr_fpll_a10
  set_instance_property link_pll SUPPRESS_ALL_WARNINGS true
  set_instance_property link_pll SUPPRESS_ALL_INFO_MESSAGES true
  set_instance_parameter_value link_pll {gui_fpll_mode} {0}
  set_instance_parameter_value link_pll {gui_reference_clock_frequency} $refclk_frequency
  set_instance_parameter_value link_pll {gui_number_of_output_clocks} 1
#  set_instance_parameter_value link_pll {gui_enable_phase_alignment} 1
  set_instance_parameter_value link_pll {gui_desired_outclk0_frequency} $linkclk_frequency
#  set pfdclk_frequency [get_instance_parameter_value link_pll gui_pfd_frequency]
#  set_instance_parameter_value link_pll {gui_desired_outclk1_frequency} $pfdclk_frequency
  set_instance_parameter_value link_pll {enable_pll_reconfig} {1}
  set_instance_parameter_value link_pll {set_capability_reg_enable} {1}
  set_instance_parameter_value link_pll {set_csr_soft_logic_enable} {1}
  set_instance_parameter_value link_pll {rcfg_separate_avmm_busy} {1}
  add_connection ref_clock.out_clk link_pll.pll_refclk0

  add_instance link_clock altera_clock_bridge
  set_instance_parameter_value link_clock {EXPLICIT_CLOCK_RATE} [expr $linkclk_frequency*1000000]
  set_instance_parameter_value link_clock {NUM_CLOCK_OUTPUTS} 2
  add_connection link_pll.outclk0 link_clock.in_clk
  add_interface link_clk clock source
  set_interface_property link_clk EXPORT_OF link_clock.out_clk

  add_instance link_reset altera_reset_bridge
  set_instance_parameter_value link_reset {NUM_RESET_OUTPUTS} 2
  add_connection sys_clock.clk link_reset.clk
  add_interface link_reset reset source
  set_interface_property link_reset EXPORT_OF link_reset.out_reset_1

  add_connection sys_clock.clk_reset link_pll.reconfig_reset0
  add_connection sys_clock.clk link_pll.reconfig_clk0

  add_instance axi_xcvr axi_adxcvr
  set_instance_parameter_value axi_xcvr {ID} $id
  set_instance_parameter_value axi_xcvr {TX_OR_RX_N} $tx_or_rx_n
  set_instance_parameter_value axi_xcvr {NUM_OF_LANES} $num_of_lanes

  add_connection sys_clock.clk axi_xcvr.s_axi_clock
  add_connection sys_clock.clk_reset axi_xcvr.s_axi_reset
  add_connection axi_xcvr.if_up_rst link_reset.in_reset
  add_connection link_pll.pll_locked axi_xcvr.core_pll_locked

  add_interface link_management axi4lite slave
  set_interface_property link_management EXPORT_OF axi_xcvr.s_axi

  add_interface link_pll_reconfig avalon slave
  set_interface_property link_pll_reconfig EXPORT_OF link_pll.reconfig_avmm0

  add_instance link_pll_reset_control altera_xcvr_reset_control
  set_instance_parameter_value link_pll_reset_control {SYS_CLK_IN_MHZ} $sysclk_frequency
  set_instance_parameter_value link_pll_reset_control {TX_PLL_ENABLE} {1}
  set_instance_parameter_value link_pll_reset_control {T_PLL_POWERDOWN} {1000}
  set_instance_parameter_value link_pll_reset_control {TX_ENABLE} {0}
  set_instance_parameter_value link_pll_reset_control {RX_ENABLE} {0}
  set_instance_parameter_value link_pll_reset_control {SYNCHRONIZE_RESET} {0}
  add_connection sys_clock.clk link_pll_reset_control.clock
  add_connection link_reset.out_reset link_pll_reset_control.reset
  add_connection sys_clock.clk_reset link_pll_reset_control.reset
  add_connection link_pll_reset_control.pll_powerdown link_pll.pll_powerdown

  create_phy_reset_control $tx_or_rx_n $num_of_lanes $sysclk_frequency

  add_instance phy jesd204_phy
  set_instance_parameter_value phy ID $id
  set_instance_parameter_value phy SOFT_PCS $soft_pcs
  set_instance_parameter_value phy TX_OR_RX_N $tx_or_rx_n
  set_instance_parameter_value phy LANE_RATE $lane_rate
  set_instance_parameter_value phy REFCLK_FREQUENCY $refclk_frequency
  set_instance_parameter_value phy NUM_OF_LANES $num_of_lanes

  add_connection link_clock.out_clk_1 phy.link_clk
  add_connection link_reset.out_reset phy.link_reset
  add_connection sys_clock.clk phy.reconfig_clk
  add_connection sys_clock.clk_reset phy.reconfig_reset

  if {$tx_or_rx_n} {
    set tx_rx "tx"
    set data_direction sink
    set jesd204_intfs {config control ilas_config event status}
    set phy_reset_intfs {analogreset digitalreset cal_busy}

    create_lane_pll $id $pllclk_frequency $refclk_frequency
    add_connection lane_pll.tx_serial_clk phy.serial_clk
  } else {
    set tx_rx "rx"
    set data_direction source
    set jesd204_intfs {config ilas_config event status}
    set phy_reset_intfs {analogreset digitalreset cal_busy is_lockedtodata}

    add_connection ref_clock.out_clk phy.ref_clk
  }

  add_instance axi_jesd204_${tx_rx} axi_jesd204_${tx_rx}
  set_instance_parameter_value axi_jesd204_${tx_rx} {NUM_LANES} $num_of_lanes

  add_connection sys_clock.clk axi_jesd204_${tx_rx}.s_axi_clock
  add_connection sys_clock.clk_reset axi_jesd204_${tx_rx}.s_axi_reset

  add_connection link_clock.out_clk_1 axi_jesd204_${tx_rx}.core_clock
  add_connection link_reset.out_reset axi_jesd204_${tx_rx}.core_reset_ext

  add_instance jesd204_${tx_rx} jesd204_${tx_rx}
  set_instance_parameter_value jesd204_${tx_rx} {NUM_LANES} $num_of_lanes

  add_connection link_clock.out_clk_1 jesd204_${tx_rx}.clock
  add_connection axi_jesd204_${tx_rx}.core_reset jesd204_${tx_rx}.reset

  foreach intf $jesd204_intfs {
    add_connection axi_jesd204_${tx_rx}.${intf} jesd204_${tx_rx}.${intf}
  }

  foreach intf $phy_reset_intfs {
    add_connection phy_reset_control.${tx_rx}_${intf} phy.${intf}
  }

  set lane_map [regexp -all -inline {\S+} $lane_map]
  for {set i 0} {$i < $num_of_lanes} {incr i} {
    if {$lane_map != {}} {
      set j [lindex $lane_map $i]
    } else {
      set j $i
    }

    add_connection jesd204_${tx_rx}.${tx_rx}_phy${j} phy.phy_${i}
  }

  for {set i 0} {$i < $num_of_lanes} {incr i} {
    add_interface phy_reconfig_${i} avalon slave
    set_interface_property phy_reconfig_${i} EXPORT_OF phy.reconfig_avmm_${i}
  }

  add_interface interrupt interrupt end
  set_interface_property interrupt EXPORT_OF axi_jesd204_${tx_rx}.interrupt
  add_interface link_reconfig axi4lite slave
  set_interface_property link_reconfig EXPORT_OF axi_jesd204_${tx_rx}.s_axi

  add_interface link_data avalon_streaming $data_direction
  set_interface_property link_data EXPORT_OF jesd204_${tx_rx}.${tx_rx}_data

  if {!$tx_or_rx_n} {
    add_interface link_sof conduit end
    set_interface_property link_sof EXPORT_OF jesd204_rx.rx_sof
  }

  add_interface sysref conduit end
  set_interface_property sysref EXPORT_OF jesd204_${tx_rx}.sysref

  add_interface sync conduit end
  set_interface_property sync EXPORT_OF jesd204_${tx_rx}.sync

  add_interface serial_data conduit end
  set_interface_property serial_data EXPORT_OF phy.serial_data
}