add linien-server package

.gitignore

@@ -1 +1,2 @@
+__pycache__
 result

fast-servo/linien-fast-servo-gateware.patch

@@ -0,0 +1,38 @@
+# diff from elhep/Fast-Servo-Firmmware commit ID 7fae40c:
+# https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729
+# Fix for migen add_source deprecation and removed xilinx bootgen command
+# .bin file is being generated by bit2bin.py from Linien repository
+# https://github.com/linien-org/linien/blob/master/gateware/bit2bin.py 
+
+diff --git a/fast_servo/gateware/fast_servo_platform.py b/fast_servo/gateware/fast_servo_platform.py
+index 13b4aa3..89a8103 100644
+--- a/fast_servo/gateware/fast_servo_platform.py
++++ b/fast_servo/gateware/fast_servo_platform.py
+@@ -324,7 +324,12 @@ class Platform(XilinxPlatform):
+         self.ps7_config = ps7_config
+ 
+         verilog_sources = os.listdir(verilog_dir)
+-        self.add_sources(verilog_dir, *verilog_sources)
++        self.add_source_dir(verilog_dir)
++
++    def build(self, *args, **kwargs):
++        build_dir = kwargs.get('build_dir', 'build')
++        self.copy_sources(build_dir)
++        super().build(*args, **kwargs)
+ 
+     def do_finalize(self, fragment):
+         try:
+diff --git a/fast_servo/gateware/fast_servo_soc.py b/fast_servo/gateware/fast_servo_soc.py
+index 02128f5..abfc583 100644
+--- a/fast_servo/gateware/fast_servo_soc.py
++++ b/fast_servo/gateware/fast_servo_soc.py
+@@ -282,9 +282,3 @@ if __name__ == "__main__":
+     os.chdir(os.path.join(root_path, build_dir))
+     with open(f"{build_name}.bif", "w") as f:
+         f.write(f"all:\n{{\n\t{build_name}.bit\n}}")
+-    
+-    cmd = f"bootgen -image {build_name}.bif -arch zynq -process_bitstream bin -w on".split(" ")
+-    subprocess.run(cmd)
+-
+-    
+-

fast-servo/linien-fast-servo-server.patch

@@ -0,0 +1,603 @@
+# diff between linen-org/linien commit ID 93f1f50:
+# https://github.com/linien-org/linien/commit/93f1f50ebd86fe3314cab5a549462d0fcbf6a658
+# and elhep/linien commit ID b73eea0:
+# https://github.com/elhep/linien/commit/b73eea07889dda8b55f0cf4c2afde96cf4c3efd1
+
+diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
+index b3f3683..98c6e51 100644
+--- a/.pre-commit-config.yaml
++++ b/.pre-commit-config.yaml
+@@ -3,7 +3,7 @@ repos:
+     rev: 23.11.0
+     hooks:
+       - id: black
+-        exclude: ^(gateware/logic/|gateware/lowlevel/|gateware/linien_module.py|linien-server/linien_server/csrmap.py)
++        exclude: ^(gateware/logic/|gateware/lowlevel/|gateware/linien_module.py|linien-server/linien_server/csrmap.py|gateware/targets)
+ 
+   - repo: https://github.com/pycqa/isort
+     rev: 5.12.0
+diff --git a/gateware/build_fpga_image.sh b/gateware/build_fpga_image.sh
+index f822402..be7401c 100644
+--- a/gateware/build_fpga_image.sh
++++ b/gateware/build_fpga_image.sh
+@@ -16,4 +16,9 @@ export PATH=$VIVADOPATH:$PATH
+ 
+ rm linien-server/linien_server/gateware.bin -f
+ # run with -m option to avoid errors related to relative imports without breaking pytest
+-python3 -m gateware.fpga_image_helper
+\ No newline at end of file
++
++if [ -z "$1" ]; then
++    python3 -m gateware.fpga_image_helper
++else
++    python3 -m gateware.fpga_image_helper -p $1
++fi
+\ No newline at end of file
+diff --git a/gateware/fpga_image_helper.py b/gateware/fpga_image_helper.py
+index 6c34429..a0b12d0 100644
+--- a/gateware/fpga_image_helper.py
++++ b/gateware/fpga_image_helper.py
+@@ -1,5 +1,6 @@
+ # Copyright 2014-2015 Robert Jördens <jordens@gmail.com>
+ # Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
+ #
+ # This file is part of Linien and based on redpid.
+ #
+@@ -23,14 +24,16 @@ from pathlib import Path
+ REPO_ROOT_DIR = Path(__file__).resolve().parents[1]
+ 
+ from .bit2bin import bit2bin
+-from .hw_platform import Platform
+-from .linien_module import RootModule
+ 
+ 
+ def py_csrconstants(map, fil):
+     fil.write("csr_constants = {\n")
+-    for k, v in root.linien.csrbanks.constants:
+-        fil.write("    '{}_{}': {},\n".format(k, v.name, v.value.value))
++    for k, v in root.csrbanks.constants:
++        if k == "linien":
++            # compaitbility layer
++            fil.write("    '{}': {},\n".format(v.name, v.value.value))
++        else:
++            fil.write("    '{}_{}': {},\n".format(k, v.name, v.value.value))
+     fil.write("}\n\n")
+ 
+ 
+@@ -52,26 +55,49 @@ def get_csrmap(banks):
+ def py_csrmap(it, fil):
+     fil.write("csr = {\n")
+     for reg in it:
+-        fil.write("    '{}_{}': ({}, 0x{:03x}, {}, {}),\n".format(*reg))
++        main_name = reg[0]
++        secondary_name = reg[1]
++        # compaitbility layer
++        if main_name == "linien" or secondary_name.startswith(main_name):
++            fil.write("    '{}': ({}, 0x{:03x}, {}, {}),\n".format(*reg[1:]))
++        else:
++            fil.write("    '{}_{}': ({}, 0x{:03x}, {}, {}),\n".format(*reg))
+     fil.write("}\n")
+ 
+ 
+ if __name__ == "__main__":
+-    platform = Platform()
+-    root = RootModule(platform)
++    import argparse
+ 
++    parser = argparse.ArgumentParser()
++    parser.add_argument("-p", "--platform", default=None)
++    args = parser.parse_args()
++    if args.platform is None or args.platform.lower() == "redpitaya":
++        from gateware.hw_platform import Platform
++        from gateware.targets.red_pitaya import PitayaSoC
++
++        platform = Platform()
++        root = PitayaSoC(platform)
++    elif args.platform.lower() == "fastservo":
++        from fast_servo.gateware.fast_servo_platform import Platform
++
++        from gateware.targets.fast_servo import LinienFastServo
++
++        platform = Platform()
++        root = LinienFastServo(platform)
++    else:
++        raise ValueError("Unknown platform")
++
++    platform.add_source_dir(REPO_ROOT_DIR / "gateware" / "verilog")
++    build_dir = REPO_ROOT_DIR / "gateware" / "build"
++    platform.build(root, build_name="top", build_dir=build_dir, run=True)
+     with open(
+         REPO_ROOT_DIR / "linien-server" / "linien_server" / "csrmap.py", "w"
+     ) as fil:
+-        py_csrconstants(root.linien.csrbanks.constants, fil)
+-        csr = get_csrmap(root.linien.csrbanks.banks)
++        py_csrconstants(root.csrbanks.constants, fil)
++        csr = get_csrmap([*root.csrbanks.banks, *root.linien.csrbanks.banks])
+         py_csrmap(csr, fil)
+         fil.write("states = {}\n".format(repr(root.linien.state_names)))
+         fil.write("signals = {}\n".format(repr(root.linien.signal_names)))
+-
+-    platform.add_source_dir(REPO_ROOT_DIR / "gateware" / "verilog")
+-    build_dir = REPO_ROOT_DIR / "gateware" / "build"
+-    platform.build(root, build_name="top", build_dir=build_dir)
+     bit2bin(
+         build_dir / "top.bit",
+         REPO_ROOT_DIR / "linien-server" / "linien_server" / "gateware.bin",
+diff --git a/gateware/linien_module.py b/gateware/linien_module.py
+index 16ca186..6905ac0 100644
+--- a/gateware/linien_module.py
++++ b/gateware/linien_module.py
+@@ -2,6 +2,7 @@
+ # Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
+ # Copyright 2021-2023 Bastian Leykauf <leykauf@physik.hu-berlin.de>
+ # Copyright 2022 Christian Freier <christian.freier@nomadatomics.com>
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
+ #
+ # This file is part of Linien and based on redpid.
+ #
+@@ -36,19 +37,13 @@ from misoc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
+ from .logic.autolock import FPGAAutolock
+ from .logic.chains import FastChain, SlowChain, cross_connect
+ from .logic.decimation import Decimate
+-from .logic.delta_sigma import DeltaSigma
+ from .logic.iir import Iir
+ from .logic.limit import LimitCSR
+ from .logic.modulate import Modulate
+ from .logic.pid import PID
+ from .logic.sweep import SweepCSR
+-from .lowlevel.analog import PitayaAnalog
+-from .lowlevel.crg import CRG
+-from .lowlevel.dna import DNA
+-from .lowlevel.gpio import Gpio
+-from .lowlevel.pitaya_ps import PitayaPS, Sys2CSR, SysCDC, SysInterconnect
++from .lowlevel.pitaya_ps import Sys2CSR
+ from .lowlevel.scopegen import ScopeGen
+-from .lowlevel.xadc import XADC
+ 
+ 
+ class LinienLogic(Module, AutoCSR):
+@@ -156,45 +151,24 @@ class LinienLogic(Module, AutoCSR):
+ 
+ 
+ class LinienModule(Module, AutoCSR):
+-    def __init__(self, platform):
++    def __init__(self, soc):
+         width = 14
+         signal_width = 25
+         coeff_width = 25
+         chain_factor_bits = 8
+ 
+         self.init_submodules(
+-            width, signal_width, coeff_width, chain_factor_bits, platform
++            width, signal_width, coeff_width, chain_factor_bits, soc
+         )
+-        self.connect_everything(width, signal_width, coeff_width, chain_factor_bits)
++        self.connect_everything(width, signal_width, coeff_width, chain_factor_bits, soc)
+ 
+     def init_submodules(
+-        self, width, signal_width, coeff_width, chain_factor_bits, platform
++        self, width, signal_width, coeff_width, chain_factor_bits, soc
+     ):
+-        sys_double = ClockDomainsRenamer("sys_double")
+ 
+         self.submodules.logic = LinienLogic(
+             coeff_width=coeff_width, chain_factor_width=chain_factor_bits
+         )
+-        self.submodules.analog = PitayaAnalog(
+-            platform.request("adc"), platform.request("dac")
+-        )
+-        self.submodules.xadc = XADC(platform.request("xadc"))
+-
+-        for i in range(4):
+-            pwm = platform.request("pwm", i)
+-            ds = sys_double(DeltaSigma(width=15))
+-            self.comb += pwm.eq(ds.out)
+-            setattr(self.submodules, f"ds{i}", ds)
+-
+-        exp = platform.request("exp")
+-        self.submodules.gpio_n = Gpio(exp.n)
+-        self.submodules.gpio_p = Gpio(exp.p)
+-
+-        leds = Cat(*(platform.request("user_led", i) for i in range(8)))
+-        self.comb += leds.eq(self.gpio_n.o)
+-
+-        self.submodules.dna = DNA(version=2)
+-
+         self.submodules.fast_a = FastChain(
+             width,
+             signal_width,
+@@ -210,18 +184,22 @@ class LinienModule(Module, AutoCSR):
+             offset_signal=self.logic.chain_b_offset_signed,
+         )
+ 
++        # FIXME: does it do anything?!
+         _ = ClockDomainsRenamer("sys_slow")
+         sys_double = ClockDomainsRenamer("sys_double")
+         max_decimation = 16
+         self.submodules.decimate = sys_double(Decimate(max_decimation))
+         self.clock_domains.cd_decimated_clock = ClockDomain()
+         decimated_clock = ClockDomainsRenamer("decimated_clock")
++        # TODO: No support for slow Analog Out on Fast Servo
+         self.submodules.slow_chain = decimated_clock(SlowChain())
+-
+         self.submodules.scopegen = ScopeGen(signal_width)
+ 
++        soc.add_interconnect_slave(self.scopegen.scope_sys)
++        soc.add_interconnect_slave(self.scopegen.asg_sys)
++
+         self.state_names, self.signal_names = cross_connect(
+-            self.gpio_n,
++            soc.gpio_n,
+             [
+                 ("fast_a", self.fast_a),
+                 ("fast_b", self.fast_b),
+@@ -233,10 +211,6 @@ class LinienModule(Module, AutoCSR):
+         )
+ 
+         csr_map = {
+-            "dna": 28,
+-            "xadc": 29,
+-            "gpio_n": 30,
+-            "gpio_p": 31,
+             "fast_a": 0,
+             "fast_b": 1,
+             "slow_chain": 2,
+@@ -251,19 +225,13 @@ class LinienModule(Module, AutoCSR):
+                 name if mem is None else name + "_" + mem.name_override
+             ],
+         )
+-        self.submodules.sys2csr = Sys2CSR()
+-        self.submodules.csrcon = csr_bus.Interconnect(
+-            self.sys2csr.csr, self.csrbanks.get_buses()
+-        )
+-        self.submodules.syscdc = SysCDC()
+-        self.comb += self.syscdc.target.connect(self.sys2csr.sys)
+ 
+-    def connect_everything(self, width, signal_width, coeff_width, chain_factor_bits):
++    def connect_everything(self, width, signal_width, coeff_width, chain_factor_bits, soc):
+         s = signal_width - width
+ 
+         self.comb += [
+-            self.fast_a.adc.eq(self.analog.adc_a),
+-            self.fast_b.adc.eq(self.analog.adc_b),
++            self.fast_a.adc.eq(soc.analog.adc_a),
++            self.fast_b.adc.eq(soc.analog.adc_b),
+         ]
+ 
+         # now, we combine the output of the two paths, with a variable factor each.
+@@ -297,7 +265,7 @@ class LinienModule(Module, AutoCSR):
+         self.comb += [
+             If(
+                 self.logic.pid_only_mode.storage,
+-                self.logic.pid.input.eq(self.analog.adc_a << s),
++                self.logic.pid.input.eq(soc.analog.adc_a << s),
+             ).Else(
+                 self.logic.pid.input.eq(mixed_limited),
+             ),
+@@ -347,40 +315,42 @@ class LinienModule(Module, AutoCSR):
+         # ANALOG OUTPUTS ---------------------------------------------------------------
+         # ANALOG OUT 0 gets a special treatment because it may contain signal of  slow
+         # pid or sweep
+-        analog_out = Signal((width + 3, True))
+-        self.comb += [
+-            analog_out.eq(
+-                Mux(
+-                    self.logic.sweep_channel.storage == OutputChannel.ANALOG_OUT0,
+-                    self.logic.sweep.y,
+-                    0,
+-                )
+-                + Mux(
+-                    self.logic.sweep_channel.storage == OutputChannel.ANALOG_OUT0,
+-                    self.logic.out_offset_signed,
+-                    0,
+-                )
+-                + Mux(
+-                    self.logic.slow_control_channel.storage
++
++        if soc.soc_name == "RedPitaya":
++            analog_out = Signal((width + 3, True))
++            self.comb += [
++                analog_out.eq(
++                    Mux(
++                        self.logic.sweep_channel.storage == OutputChannel.ANALOG_OUT0,
++                        self.logic.sweep.y,
++                        0,
++                    )
++                    + Mux(
++                        self.logic.sweep_channel.storage == OutputChannel.ANALOG_OUT0,
++                        self.logic.out_offset_signed,
++                        0,
++                    )
++                    + Mux(
++                        self.logic.slow_control_channel.storage
+                     == OutputChannel.ANALOG_OUT0,
+                     self.slow_chain.output,
+-                    0,
+-                )
+-            ),
+-        ]
+-        # NOTE: not sure why limit is used
+-        self.comb += self.slow_chain.limit.x.eq(analog_out)
+-        # ds0 apparently has 16 bit, but only allowing positive  values --> "15 bit"?
+-        slow_out_shifted = Signal(15)
+-        self.sync += slow_out_shifted.eq((self.slow_chain.limit.y << 1) + (1 << 14))
+-        self.comb += self.ds0.data.eq(slow_out_shifted)
+-
+-        # connect other analog outputs
+-        self.comb += [
+-            self.ds1.data.eq(self.logic.analog_out_1.storage),
+-            self.ds2.data.eq(self.logic.analog_out_2.storage),
+-            self.ds3.data.eq(self.logic.analog_out_3.storage),
+-        ]
++                        0,
++                    )
++                ),
++            ]
++            # NOTE: not sure why limit is used
++            self.comb += self.slow_chain.limit.x.eq(analog_out)
++            # ds0 apparently has 16 bit, but only allowing positive  values --> "15 bit"?
++            slow_out_shifted = Signal(15)
++            self.sync += slow_out_shifted.eq((self.slow_chain.limit.y << 1) + (1 << 14))
++            self.comb += soc.ds0.data.eq(slow_out_shifted)
++
++            # connect other analog outputs
++            self.comb += [
++                soc.ds1.data.eq(self.logic.analog_out_1.storage),
++                soc.ds2.data.eq(self.logic.analog_out_2.storage),
++                soc.ds3.data.eq(self.logic.analog_out_3.storage),
++            ]
+ 
+         # ------------------------------------------------------------------------------
+ 
+@@ -395,7 +365,7 @@ class LinienModule(Module, AutoCSR):
+ 
+         self.comb += [
+             self.logic.autolock.robust.at_start.eq(self.logic.sweep.sweep.trigger),
+-            self.scopegen.gpio_trigger.eq(self.gpio_p.i[0]),
++            self.scopegen.gpio_trigger.eq(soc.gpio_p.i[0]),
+             self.scopegen.sweep_trigger.eq(self.logic.sweep.sweep.trigger),
+             self.scopegen.automatically_rearm.eq(
+                 self.logic.autolock.request_lock.storage
+@@ -404,8 +374,8 @@ class LinienModule(Module, AutoCSR):
+             self.scopegen.automatically_trigger.eq(
+                 self.logic.autolock.lock_running.status
+             ),
+-            self.analog.dac_a.eq(self.logic.limit_fast1.y),
+-            self.analog.dac_b.eq(self.logic.limit_fast2.y),
++            soc.analog.dac_a.eq(self.logic.limit_fast1.y),
++            soc.analog.dac_b.eq(self.logic.limit_fast2.y),
+         ]
+ 
+         # Having this in a comb statement caused errors. See PR #251.
+@@ -428,23 +398,4 @@ class DummyHK(Module, AutoCSR):
+         self.submodules.csrcon = csr_bus.Interconnect(
+             self.sys2csr.csr, self.csrbanks.get_buses()
+         )
+-        self.sys = self.sys2csr.sys
+-
+-
+-class RootModule(Module):
+-    def __init__(self, platform):
+-        self.submodules.ps = PitayaPS(platform.request("cpu"))
+-        self.submodules.crg = CRG(
+-            platform.request("clk125"), self.ps.fclk[0], ~self.ps.frstn[0]
+-        )
+-        self.submodules.linien = LinienModule(platform)
+-
+-        self.submodules.hk = ClockDomainsRenamer("sys_ps")(DummyHK())
+-
+-        self.submodules.ic = SysInterconnect(
+-            self.ps.axi.sys,
+-            self.hk.sys,
+-            self.linien.scopegen.scope_sys,
+-            self.linien.scopegen.asg_sys,
+-            self.linien.syscdc.source,
+-        )
++        self.sys = self.sys2csr.sys
+\ No newline at end of file
+diff --git a/gateware/targets/__init__.py b/gateware/targets/__init__.py
+new file mode 100644
+index 0000000..e69de29
+diff --git a/gateware/targets/fast_servo.py b/gateware/targets/fast_servo.py
+new file mode 100644
+index 0000000..da5bf3b
+--- /dev/null
++++ b/gateware/targets/fast_servo.py
+@@ -0,0 +1,85 @@
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
++# Warsaw University of Technology
++#
++# This file is part of Linien and provides support for Linien on
++# Fast Servo platform.
++#
++# Linien is free software: you can redistribute it and/or modify
++# it under the terms of the GNU General Public License as published by
++# the Free Software Foundation, either version 3 of the License, or
++# (at your option) any later version.
++#
++# Linien 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
++# along with Linien.  If not, see <http://www.gnu.org/licenses/>.
++
++from fast_servo.gateware.fast_servo_soc import BaseSoC
++from migen import *
++from misoc.interconnect import csr_bus
++
++from gateware.linien_module import DummyHK, LinienModule
++from gateware.lowlevel.dna import DNA
++from gateware.lowlevel.gpio import Gpio
++from gateware.lowlevel.pitaya_ps import SysInterconnect
++
++
++class FastServoAnalog(Module):
++    def __init__(self, adc, dac):
++        size = 14       # length of DAC
++
++        self.adc_a = Signal(size)
++        self.adc_b = Signal(size)
++        self.dac_a = Signal(size)
++        self.dac_b = Signal(size)
++
++        self.comb += [
++            self.adc_a.eq(adc.data_out[0][2:]),
++            self.adc_b.eq(adc.data_out[1][2:]),        
++        ]
++
++        self.sync += [
++            dac.data_in[0].eq(self.dac_a),
++            dac.data_in[1].eq(self.dac_b),
++        ]
++
++
++class LinienFastServo(BaseSoC):
++    def __init__(self, platform):
++        super().__init__(platform)
++    
++        self.submodules.dna = DNA(version=2)
++
++        self.submodules.analog = FastServoAnalog(self.adc, self.dac)
++        gpios = platform.request("gpio")
++        self.submodules.gpio_n = Gpio(gpios.n)
++        # self.csr_devices.append("gpio_n")
++        self.submodules.gpio_p = Gpio(gpios.p)
++        # self.csr_devices.append("gpio_p")
++        self.csr_map.update({
++            "dna": 28,
++            "gpio_n": 30,
++            "gpio_p": 31,
++        })
++
++        # ---------------------------------------------
++        # 
++        # FIXME - passing self to LinienModule
++        self.submodules.linien = LinienModule(self)
++
++    def soc_finalize(self):
++        self.add_interconnect_slave(self.syscdc.source)
++        self.submodules.csrbanks = csr_bus.CSRBankArray(self,
++            self.get_csr_dev_address)
++        self.submodules.csrcon = csr_bus.Interconnect(
++            self.sys2csr.csr, [*self.csrbanks.get_buses(), *self.linien.csrbanks.get_buses()]
++        )
++        self.submodules.hk = DummyHK()
++        self.submodules.interconnect = SysInterconnect(
++            self.axi2sys.sys,
++            self.hk.sys,
++            *self.interconnect_slaves
++        )
+\ No newline at end of file
+diff --git a/gateware/targets/red_pitaya.py b/gateware/targets/red_pitaya.py
+new file mode 100644
+index 0000000..c029e81
+--- /dev/null
++++ b/gateware/targets/red_pitaya.py
+@@ -0,0 +1,103 @@
++# Copyright 2014-2015 Robert Jördens <jordens@gmail.com>
++# Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
++# Copyright 2021-2023 Bastian Leykauf <leykauf@physik.hu-berlin.de>
++# Copyright 2022 Christian Freier <christian.freier@nomadatomics.com>
++# Copyright 2023 Jakub Matyas <jakubk.m@gmail.com>
++#
++# This file is part of Linien and based on redpid.
++#
++# Linien is free software: you can redistribute it and/or modify
++# it under the terms of the GNU General Public License as published by
++# the Free Software Foundation, either version 3 of the License, or
++# (at your option) any later version.
++#
++# Linien 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
++# along with Linien.  If not, see <http://www.gnu.org/licenses/>.
++
++from migen import *
++from misoc.interconnect import csr_bus
++from misoc.interconnect.csr import AutoCSR
++
++from gateware.linien_module import DummyHK, LinienModule
++from gateware.logic.delta_sigma import DeltaSigma
++from gateware.lowlevel.analog import PitayaAnalog
++from gateware.lowlevel.crg import CRG
++from gateware.lowlevel.dna import DNA
++from gateware.lowlevel.gpio import Gpio
++from gateware.lowlevel.pitaya_ps import PitayaPS, Sys2CSR, SysCDC, SysInterconnect
++from gateware.lowlevel.xadc import XADC
++
++
++class PitayaSoC(Module, AutoCSR):
++    def __init__(self, platform):
++        self.csr_map = {
++            "gpio_n": 30,
++            "gpio_p": 31,
++            "dna": 28,
++            "xadc": 29,
++        }
++        self.soc_name = "RedPitaya"
++        self.interconnect_slaves = []
++
++        self.submodules.ps = PitayaPS(platform.request("cpu"))
++        self.submodules.crg = CRG(
++            platform.request("clk125"), self.ps.fclk[0], ~self.ps.frstn[0]
++        )
++        self.submodules.sys2csr = Sys2CSR()
++        self.submodules.syscdc = SysCDC()
++        self.comb += self.syscdc.target.connect(self.sys2csr.sys)
++
++        self.submodules.xadc = XADC(platform.request("xadc"))
++        self.submodules.analog = PitayaAnalog(platform.request("adc"), platform.request("dac"))
++
++        for i in range(4):
++            pwm = platform.request("pwm", i)
++            ds = ClockDomainsRenamer("sys_double")(DeltaSigma(width=15))
++            self.comb += pwm.eq(ds.out)
++            setattr(self.submodules, f"ds{i}", ds)
++
++        exp = platform.request("exp")
++        self.submodules.gpio_n = Gpio(exp.n)
++        self.submodules.gpio_p = Gpio(exp.p)
++
++        leds = Cat(*(platform.request("user_led", i) for i in range(8)))
++        self.comb += leds.eq(self.gpio_n.o)
++
++        self.submodules.dna = DNA(version=2)
++        
++        # ---------------------------------------------
++        # 
++        # FIXME - passing self to LinienModule
++        self.submodules.linien = LinienModule(self)
++        self.add_interconnect_slave(self.syscdc.source)
++        self.run_finalize()
++
++
++    def add_interconnect_slave(self, slave):
++        self.interconnect_slaves.append(slave)
++
++    def get_csr_dev_address(self, name, memory):
++        if memory is not None:
++            name = name + "_" + memory.name_override
++        try:
++            return self.csr_map[name]
++        except KeyError:
++            return None
++
++    def run_finalize(self):
++        self.submodules.csrbanks = csr_bus.CSRBankArray(self,
++            self.get_csr_dev_address)
++        self.submodules.csrcon = csr_bus.Interconnect(
++            self.sys2csr.csr, [*self.csrbanks.get_buses(), *self.linien.csrbanks.get_buses()]
++        )
++        self.submodules.hk = DummyHK()
++        self.submodules.interconnect = SysInterconnect(
++            self.ps.axi.sys,
++            self.hk.sys,
++            *self.interconnect_slaves
++        )
+\ No newline at end of file

fast-servo/linien-gateware/README.md

@@ -0,0 +1,5 @@
+## Source Repository
+Files in this directory were copied from [elhep/Fast-Servo-Frimware](https://github.com/elhep/Fast-Servo-Firmware/tree/master/fast_servo/gateware).
+
+## Commit ID
+The files were copied from commit ID [7fae40c](https://github.com/elhep/Fast-Servo-Firmware/commit/7fae40c0f872a91218be378f8289b98b1e366729).

fast-servo/linien-gateware/__init__.py

@@ -0,0 +1,3 @@
+import os
+
+verilog_dir = os.path.join(os.path.abspath(os.path.dirname(__file__)), "verilog")

fast-servo/linien-gateware/cores/adc.py

@@ -0,0 +1,179 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from migen import *
+from migen.genlib.cdc import MultiReg
+from misoc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
+
+
+class _CRG(Module):
+    def __init__(self, platform, dco_clk, dco_freq=200e6):
+        self.clock_domains.cd_dco = ClockDomain()
+        self.clock_domains.cd_dco2x = ClockDomain()
+        self.clock_domains.cd_dco2d = ClockDomain()
+        dco_clk_p, dco_clk_n = dco_clk
+
+        dco_clk_buf = Signal()
+        self.specials += Instance(
+            "IBUFGDS", i_I=dco_clk_p, i_IB=dco_clk_n, o_O=dco_clk_buf
+        )
+
+        # # #
+        clk_feedback = Signal()
+        clk_feedback_buf = Signal()
+
+        clk_dco = Signal()
+        clk_dco2x = Signal()
+        clk_dco2d = Signal()
+        self.locked = Signal()
+
+        platform.add_period_constraint(dco_clk_p, 1e9 / dco_freq)
+        self.specials += [
+            Instance(
+                "PLLE2_BASE",
+                p_BANDWIDTH="OPTIMIZED",
+                p_DIVCLK_DIVIDE=1,
+                p_CLKFBOUT_PHASE=0.0,
+                p_CLKFBOUT_MULT=4,  # VCO @ 800 MHz
+                p_CLKIN1_PERIOD=(1e9 / dco_freq),
+                p_REF_JITTER1=0.01,
+                p_STARTUP_WAIT="FALSE",
+                i_CLKIN1=dco_clk_buf,
+                i_PWRDWN=0,
+                i_RST=ResetSignal("sys"),
+                i_CLKFBIN=clk_feedback_buf,
+                o_CLKFBOUT=clk_feedback,
+                p_CLKOUT0_DIVIDE=4,
+                p_CLKOUT0_PHASE=0.0,
+                p_CLKOUT0_DUTY_CYCLE=0.5,
+                o_CLKOUT0=clk_dco,  # 200 MHz <- dco_clk
+                p_CLKOUT1_DIVIDE=2,
+                p_CLKOUT1_PHASE=0.0,
+                p_CLKOUT1_DUTY_CYCLE=0.5,
+                o_CLKOUT1=clk_dco2x,  # 400 MHZ <- 2 * dco_clk = 2*200 MHz
+                p_CLKOUT2_DIVIDE=8,
+                p_CLKOUT2_PHASE=0.0,
+                p_CLKOUT2_DUTY_CYCLE=0.5,
+                o_CLKOUT2=clk_dco2d,  # 100 MHz <- dco_clk / 2 = 200 MHz / 2
+                o_LOCKED=self.locked,
+            )
+        ]
+
+        self.specials += Instance("BUFG", i_I=clk_feedback, o_O=clk_feedback_buf)
+        self.specials += Instance("BUFG", i_I=clk_dco, o_O=self.cd_dco.clk)
+        self.specials += Instance("BUFG", i_I=clk_dco2d, o_O=self.cd_dco2d.clk)
+        self.specials += Instance("BUFG", i_I=clk_dco2x, o_O=self.cd_dco2x.clk)
+
+
+class ADC(Module, AutoCSR):
+    def __init__(self, platform, dco_freq=200e6):
+        adc_pads = platform.request("adc")
+        afe_pads = platform.request("adc_afe")
+
+        self.frame_csr = CSRStatus(4)
+        self.data_ch0 = CSRStatus(16)
+        self.data_ch1 = CSRStatus(16)
+
+        self.tap_delay = CSRStorage(5)
+        self.bitslip_csr = CSRStorage(1)
+
+        self.afe_ctrl = CSRStorage(4)
+
+        tap_delay_val = Signal(5)
+        bitslip = Signal()
+        bitslip_re_dco_2d = Signal()
+
+        ch1_gain_x10 = Signal()
+        ch2_gain_x10 = Signal()
+        ch1_shdn = Signal()
+        ch2_shdn = Signal()
+
+        self.data_out = [Signal(16, reset_less=True), Signal(16, reset_less=True)]
+        self.s_frame = Signal(4)
+
+        ###
+
+        # DCO clock coming from LTC2195
+        # dco_clk = Record([("p", 1), ("n", 1)])
+        dco_clk =(adc_pads.dco_p, adc_pads.dco_n)
+        self.comb += [
+            # dco_clk.p.eq(adc_pads.dco_p),
+            # dco_clk.n.eq(adc_pads.dco_n),
+            tap_delay_val.eq(self.tap_delay.storage),
+            Cat(ch1_gain_x10, ch2_gain_x10, ch1_shdn, ch2_shdn).eq(
+                self.afe_ctrl.storage
+            ),
+        ]
+
+        self.submodules._crg = _CRG(platform, dco_clk, dco_freq)
+
+        self.specials += MultiReg(self.bitslip_csr.re, bitslip_re_dco_2d, "dco2d")
+        self.sync.dco2d += [
+            bitslip.eq(Mux(bitslip_re_dco_2d, self.bitslip_csr.storage, 0))
+        ]
+
+        self.comb += [
+            self.frame_csr.status.eq(self.s_frame),
+            self.data_ch0.status.eq(self.data_out[0]),
+            self.data_ch1.status.eq(self.data_out[1]),
+        ]
+
+        self.comb += [
+            afe_pads.ch1_gain.eq(ch1_gain_x10),
+            afe_pads.ch2_gain.eq(ch2_gain_x10),
+            afe_pads.nshdn_ch1.eq(~ch1_shdn),
+            afe_pads.nshdn_ch2.eq(~ch2_shdn),
+        ]
+
+        dummy = Signal(8)
+        dummy_idelay_rdy = Signal()
+
+        self.specials += Instance(
+            "LTC2195",
+            i_rst_in=ResetSignal("sys"),
+            i_clk200=ClockSignal("idelay"),
+            i_DCO=ClockSignal("dco"),
+            i_DCO_2D=ClockSignal("dco2d"),
+            i_FR_in_p=adc_pads.frame_p,
+            i_FR_in_n=adc_pads.frame_n,
+            i_D0_in_p=adc_pads.data0_p,
+            i_D0_in_n=adc_pads.data0_n,
+            i_D1_in_p=adc_pads.data1_p,
+            i_D1_in_n=adc_pads.data1_n,
+            i_bitslip=bitslip,
+            i_delay_val=tap_delay_val,
+            o_ADC0_out=self.data_out[1],        # LANES swapped on hardware
+            o_ADC1_out=self.data_out[0],
+            o_FR_out=self.s_frame,
+            o_o_data_from_pins=dummy,
+            o_idelay_rdy=dummy_idelay_rdy,
+        )
+
+
+class AUX_ADC_CTRL(Module, AutoCSR):
+    def __init__(self, platform):
+        adc_aux_pads = platform.request("aux_adc")
+
+        self.adc_aux_ctrl = CSRStorage(5)
+
+        self.comb += [
+            adc_aux_pads.diff_n.eq(~self.adc_aux_ctrl.storage[0]),
+            adc_aux_pads.a.eq(self.adc_aux_ctrl.storage[1:4]),
+            adc_aux_pads.range.eq(self.adc_aux_ctrl.storage[4]),
+        ]

fast-servo/linien-gateware/cores/dac.py

@@ -0,0 +1,84 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from migen import *
+from misoc.interconnect.csr import AutoCSR, CSRStorage
+from migen.genlib.io import DDROutput
+
+
+class DAC(Module, AutoCSR):
+    def __init__(self, platform):
+        dac_pads = platform.request("dac")
+        dac_afe_pads = platform.request("dac_afe")
+        self.dac_ctrl = CSRStorage(3)
+        self.output_value_ch0 = CSRStorage(14)
+        self.output_value_ch1 = CSRStorage(14)
+
+        manual_override = Signal()
+        ch0_pd = Signal()
+        ch1_pd = Signal()
+
+        output_data_ch0 = Signal(14)
+        output_data_ch1 = Signal(14)
+
+        self.data_in = [Signal(14, reset_less=True), Signal(14, reset_less=True)]
+        platform.add_period_constraint(dac_pads.dclkio, 10.0)
+
+        self.comb += [
+            Cat(manual_override, ch0_pd, ch1_pd).eq(self.dac_ctrl.storage),
+            dac_pads.rst.eq(ResetSignal("sys")),
+            dac_afe_pads.ch1_pd_n.eq(~ch0_pd),
+            dac_afe_pads.ch2_pd_n.eq(~ch1_pd),
+            output_data_ch0.eq(
+                Mux(manual_override, self.output_value_ch0.storage, self.data_in[0])
+            ),
+            output_data_ch1.eq(
+                Mux(manual_override, self.output_value_ch1.storage, self.data_in[1])
+            ),
+        ]
+
+        # data
+        for lane in range(14):
+            self.specials += DDROutput(
+                i1 = output_data_ch0[lane], 
+                i2 = output_data_ch1[lane], 
+                o = dac_pads.data[lane], 
+                clk = ClockSignal("dco2d")
+            )
+        
+        # clock forwarding
+        self.specials += DDROutput(
+            i1 = 0b0,
+            i2 = 0b1,
+            o = dac_pads.dclkio,
+            clk = ClockSignal("dco2d"),
+        )
+
+
+class AUX_DAC_CTRL(Module, AutoCSR):
+    def __init__(self, platform):
+        dac_aux_pads = platform.request("aux_dac")
+
+        self.dac_aux_ctrl = CSRStorage(3)
+
+        self.comb += [
+            dac_aux_pads.nclr.eq(~self.dac_aux_ctrl.storage[0]),
+            dac_aux_pads.bin.eq(self.dac_aux_ctrl.storage[1]),
+            dac_aux_pads.nldac.eq(~self.dac_aux_ctrl.storage[2]),
+        ]

fast-servo/linien-gateware/cores/pitaya_ps.py

@@ -0,0 +1,385 @@
+# Copyright 2014-2015 Robert Jördens <jordens@gmail.com>
+# Copyright 2018-2022 Benjamin Wiegand <benjamin.wiegand@physik.hu-berlin.de>
+# Copyright 2021-2022 Bastian Leykauf <leykauf@physik.hu-berlin.de>
+# Copyright 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+#
+# This file is part of Fast Servo Software Package and is based on Linien.
+#
+# Linien is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Linien 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
+# along with Linien.  If not, see <http://www.gnu.org/licenses/>.
+
+from functools import reduce
+from operator import or_
+
+from migen import (
+    DIR_M_TO_S,
+    DIR_S_TO_M,
+    Cat,
+    ClockSignal,
+    If,
+    Instance,
+    Module,
+    Record,
+    Replicate,
+    ResetSignal,
+    Signal,
+)
+from misoc.interconnect import csr_bus, wishbone
+
+sys_layout = [
+    ("rstn", 1, DIR_M_TO_S),
+    ("clk", 1, DIR_M_TO_S),
+    ("addr", 32, DIR_M_TO_S),
+    ("wdata", 32, DIR_M_TO_S),
+    ("sel", 4, DIR_M_TO_S),
+    ("wen", 1, DIR_M_TO_S),
+    ("ren", 1, DIR_M_TO_S),
+    ("rdata", 32, DIR_S_TO_M),
+    ("err", 1, DIR_S_TO_M),
+    ("ack", 1, DIR_S_TO_M),
+]
+
+
+axi_layout = [
+    ("arvalid", 1),
+    ("awvalid", 1),
+    ("bready", 1),
+    ("rready", 1),
+    ("wlast", 1),
+    ("wvalid", 1),
+    ("arid", 12),
+    ("awid", 12),
+    ("wid", 12),
+    ("arburst", 2),
+    ("arlock", 2),
+    ("arsize", 3),
+    ("awburst", 2),
+    ("awlock", 2),
+    ("awsize", 3),
+    ("arprot", 3),
+    ("awprot", 3),
+    ("araddr", 32),
+    ("awaddr", 32),
+    ("wdata", 32),
+    ("arcache", 4),
+    ("arlen", 4),
+    ("arqos", 4),
+    ("awcache", 4),
+    ("awlen", 4),
+    ("awqos", 4),
+    ("wstrb", 4),
+    ("aclk", 1),
+    ("arready", 1),
+    ("awready", 1),
+    ("bvalid", 1),
+    ("rlast", 1),
+    ("rvalid", 1),
+    ("wready", 1),
+    ("bid", 12),
+    ("rid", 12),
+    ("bresp", 2),
+    ("rresp", 2),
+    ("rdata", 32),
+    ("arstn", 1),
+]
+
+
+class PitayaPS(Module):
+    def __init__(self, cpu):
+        self.fclk = Signal(4)
+        self.frstn = Signal(4)
+
+        ###
+
+        self.submodules.axi = Axi2Sys()
+        axi = self.axi.axi
+        self.comb += [
+            axi.aclk.eq(self.fclk[0]),
+            axi.arstn.eq(self.frstn[0]),
+        ]
+
+        self.specials += Instance(
+            "system_processing_system7_0_0",
+            io_MIO=cpu.mio,
+            io_PS_CLK=cpu.ps_clk,
+            io_PS_PORB=cpu.ps_porb,
+            io_PS_SRSTB=cpu.ps_srstb,
+            io_DDR_Addr=cpu.DDR_addr,
+            io_DDR_BankAddr=cpu.DDR_ba,
+            io_DDR_CAS_n=cpu.DDR_cas_n,
+            io_DDR_Clk_n=cpu.DDR_ck_n,
+            io_DDR_Clk=cpu.DDR_ck_p,
+            io_DDR_CKE=cpu.DDR_cke,
+            io_DDR_CS_n=cpu.DDR_cs_n,
+            io_DDR_DM=cpu.DDR_dm,
+            io_DDR_DQ=cpu.DDR_dq,
+            io_DDR_DQS_n=cpu.DDR_dqs_n,
+            io_DDR_DQS=cpu.DDR_dqs_p,
+            io_DDR_ODT=cpu.DDR_odt,
+            io_DDR_RAS_n=cpu.DDR_ras_n,
+            io_DDR_DRSTB=cpu.DDR_reset_n,
+            io_DDR_WEB=cpu.DDR_we_n,
+            io_DDR_VRN=cpu.ddr_vrn,
+            io_DDR_VRP=cpu.ddr_vrp,
+            o_FCLK_CLK0=self.fclk[0],
+            o_FCLK_CLK1=self.fclk[1],
+            o_FCLK_CLK2=self.fclk[2],
+            o_FCLK_CLK3=self.fclk[3],
+            o_FCLK_RESET0_N=self.frstn[0],
+            o_FCLK_RESET1_N=self.frstn[1],
+            o_FCLK_RESET2_N=self.frstn[2],
+            o_FCLK_RESET3_N=self.frstn[3],
+            i_M_AXI_GP0_ACLK=axi.aclk,
+            o_M_AXI_GP0_ARVALID=axi.arvalid,
+            o_M_AXI_GP0_AWVALID=axi.awvalid,
+            o_M_AXI_GP0_BREADY=axi.bready,
+            o_M_AXI_GP0_RREADY=axi.rready,
+            o_M_AXI_GP0_WLAST=axi.wlast,
+            o_M_AXI_GP0_WVALID=axi.wvalid,
+            o_M_AXI_GP0_ARID=axi.arid,
+            o_M_AXI_GP0_AWID=axi.awid,
+            o_M_AXI_GP0_WID=axi.wid,
+            o_M_AXI_GP0_ARBURST=axi.arburst,
+            o_M_AXI_GP0_ARLOCK=axi.arlock,
+            o_M_AXI_GP0_ARSIZE=axi.arsize,
+            o_M_AXI_GP0_AWBURST=axi.awburst,
+            o_M_AXI_GP0_AWLOCK=axi.awlock,
+            o_M_AXI_GP0_AWSIZE=axi.awsize,
+            o_M_AXI_GP0_ARPROT=axi.arprot,
+            o_M_AXI_GP0_AWPROT=axi.awprot,
+            o_M_AXI_GP0_ARADDR=axi.araddr,
+            o_M_AXI_GP0_AWADDR=axi.awaddr,
+            o_M_AXI_GP0_WDATA=axi.wdata,
+            o_M_AXI_GP0_ARCACHE=axi.arcache,
+            o_M_AXI_GP0_ARLEN=axi.arlen,
+            o_M_AXI_GP0_ARQOS=axi.arqos,
+            o_M_AXI_GP0_AWCACHE=axi.awcache,
+            o_M_AXI_GP0_AWLEN=axi.awlen,
+            o_M_AXI_GP0_AWQOS=axi.awqos,
+            o_M_AXI_GP0_WSTRB=axi.wstrb,
+            i_M_AXI_GP0_ARREADY=axi.arready,
+            i_M_AXI_GP0_AWREADY=axi.awready,
+            i_M_AXI_GP0_BVALID=axi.bvalid,
+            i_M_AXI_GP0_RLAST=axi.rlast,
+            i_M_AXI_GP0_RVALID=axi.rvalid,
+            i_M_AXI_GP0_WREADY=axi.wready,
+            i_M_AXI_GP0_BID=axi.bid,
+            i_M_AXI_GP0_RID=axi.rid,
+            i_M_AXI_GP0_BRESP=axi.bresp,
+            i_M_AXI_GP0_RRESP=axi.rresp,
+            i_M_AXI_GP0_RDATA=axi.rdata,
+            i_SPI0_SS_I=0,
+            # i_SPI0_SS_I=spi.ss_i,
+            # o_SPI0_SS_O=spi.ss_o,
+            # o_SPI0_SS_T=spi.ss_t,
+            # o_SPI0_SS1_O=spi.ss1_o,
+            # o_SPI0_SS2_O=spi.ss2_o,
+            i_SPI0_SCLK_I=0,
+            # i_SPI0_SCLK_I=spi.sclk_i,
+            # o_SPI0_SCLK_O=spi.sclk_o,
+            # o_SPI0_SCLK_T=spi.sclk_t,
+            i_SPI0_MOSI_I=0,
+            # i_SPI0_MOSI_I=spi.mosi_i,
+            # o_SPI0_MOSI_O=spi.mosi_o,
+            # o_SPI0_MOSI_T=spi.mosi_t,
+            i_SPI0_MISO_I=0,
+            # i_SPI0_MISO_I=spi.miso_i,
+            # o_SPI0_MISO_O=spi.miso_o,
+            # o_SPI0_MISO_T=spi.miso_t,
+            i_USB0_VBUS_PWRFAULT=0,
+        )
+
+
+class Axi2Sys(Module):
+    def __init__(self):
+        self.sys = Record(sys_layout)
+        self.axi = Record(axi_layout)
+
+        ###
+
+        self.comb += [self.sys.clk.eq(self.axi.aclk), self.sys.rstn.eq(self.axi.arstn)]
+
+        self.specials += Instance(
+            "axi_slave",
+            p_AXI_DW=32,
+            p_AXI_AW=32,
+            p_AXI_IW=12,
+            i_axi_clk_i=self.axi.aclk,
+            i_axi_rstn_i=self.axi.arstn,
+            i_axi_awid_i=self.axi.awid,
+            i_axi_awaddr_i=self.axi.awaddr,
+            i_axi_awlen_i=self.axi.awlen,
+            i_axi_awsize_i=self.axi.awsize,
+            i_axi_awburst_i=self.axi.awburst,
+            i_axi_awlock_i=self.axi.awlock,
+            i_axi_awcache_i=self.axi.awcache,
+            i_axi_awprot_i=self.axi.awprot,
+            i_axi_awvalid_i=self.axi.awvalid,
+            o_axi_awready_o=self.axi.awready,
+            i_axi_wid_i=self.axi.wid,
+            i_axi_wdata_i=self.axi.wdata,
+            i_axi_wstrb_i=self.axi.wstrb,
+            i_axi_wlast_i=self.axi.wlast,
+            i_axi_wvalid_i=self.axi.wvalid,
+            o_axi_wready_o=self.axi.wready,
+            o_axi_bid_o=self.axi.bid,
+            o_axi_bresp_o=self.axi.bresp,
+            o_axi_bvalid_o=self.axi.bvalid,
+            i_axi_bready_i=self.axi.bready,
+            i_axi_arid_i=self.axi.arid,
+            i_axi_araddr_i=self.axi.araddr,
+            i_axi_arlen_i=self.axi.arlen,
+            i_axi_arsize_i=self.axi.arsize,
+            i_axi_arburst_i=self.axi.arburst,
+            i_axi_arlock_i=self.axi.arlock,
+            i_axi_arcache_i=self.axi.arcache,
+            i_axi_arprot_i=self.axi.arprot,
+            i_axi_arvalid_i=self.axi.arvalid,
+            o_axi_arready_o=self.axi.arready,
+            o_axi_rid_o=self.axi.rid,
+            o_axi_rdata_o=self.axi.rdata,
+            o_axi_rresp_o=self.axi.rresp,
+            o_axi_rlast_o=self.axi.rlast,
+            o_axi_rvalid_o=self.axi.rvalid,
+            i_axi_rready_i=self.axi.rready,
+            o_sys_addr_o=self.sys.addr,
+            o_sys_wdata_o=self.sys.wdata,
+            o_sys_sel_o=self.sys.sel,
+            o_sys_wen_o=self.sys.wen,
+            o_sys_ren_o=self.sys.ren,
+            i_sys_rdata_i=self.sys.rdata,
+            i_sys_err_i=self.sys.err,
+            i_sys_ack_i=self.sys.ack,
+        )
+
+
+class SysInterconnect(Module):
+    def __init__(self, master, *slaves):        
+        cs = Signal(max=len(slaves)) if len(slaves) != 1 else Signal()
+        self.comb += cs.eq(master.addr[20:23])
+        rets = []
+        for i, s in enumerate(slaves):
+            sel = Signal()
+            self.comb += [
+                sel.eq(cs == i),
+                s.clk.eq(master.clk),
+                s.rstn.eq(master.rstn),
+                s.addr.eq(master.addr),
+                s.wdata.eq(master.wdata),
+                s.sel.eq(master.sel),
+                s.wen.eq(sel & master.wen),
+                s.ren.eq(sel & master.ren),
+            ]
+            ret = Cat(s.err, s.ack, s.rdata)
+            rets.append(Replicate(sel, len(ret)) & ret)
+        self.comb += Cat(master.err, master.ack, master.rdata).eq(reduce(or_, rets))
+
+
+class Sys2Wishbone(Module):
+    def __init__(self):
+        self.wishbone = wb = wishbone.Interface()
+        self.sys = sys = Record(sys_layout)
+
+        ###
+
+        sys2 = Record(sys_layout)
+
+        self.specials += Instance(
+            "bus_clk_bridge",
+            i_sys_clk_i=sys.clk,
+            i_sys_rstn_i=sys.rstn,
+            i_sys_addr_i=sys.addr,
+            i_sys_wdata_i=sys.wdata,
+            i_sys_sel_i=sys.sel,
+            i_sys_wen_i=sys.wen,
+            i_sys_ren_i=sys.ren,
+            o_sys_rdata_o=sys.rdata,
+            o_sys_err_o=sys.err,
+            o_sys_ack_o=sys.ack,
+            i_clk_i=ClockSignal(),
+            i_rstn_i=~ResetSignal(),
+            o_addr_o=sys2.addr,
+            o_wen_o=sys2.wen,
+            o_ren_o=sys2.ren,
+            o_wdata_o=sys2.wdata,
+            i_rdata_i=sys2.rdata,
+            i_err_i=sys2.err,
+            i_ack_i=sys2.ack,
+        )
+        self.sync += [
+            If(
+                sys2.ren | sys2.wen,
+                wb.cyc.eq(1),
+                wb.adr.eq(sys2.addr[2:]),
+                wb.we.eq(sys2.wen),
+                wb.dat_w.eq(sys2.wdata),
+            ).Elif(wb.ack, wb.cyc.eq(0))
+        ]
+        self.comb += [
+            wb.stb.eq(wb.cyc),
+            sys2.rdata.eq(wb.dat_r),
+            sys2.ack.eq(wb.ack),
+            sys2.err.eq(wb.err),
+        ]
+
+
+class SysCDC(Module):
+    def __init__(self, cd_target="sys"):
+        self.source = Record(sys_layout)
+        self.target = Record(sys_layout)
+
+        self.specials += Instance(
+            "bus_clk_bridge",
+            i_sys_clk_i=self.source.clk,
+            i_sys_rstn_i=self.source.rstn,
+            i_sys_addr_i=self.source.addr,
+            i_sys_wdata_i=self.source.wdata,
+            i_sys_sel_i=self.source.sel,
+            i_sys_wen_i=self.source.wen,
+            i_sys_ren_i=self.source.ren,
+            o_sys_rdata_o=self.source.rdata,
+            o_sys_err_o=self.source.err,
+            o_sys_ack_o=self.source.ack,
+            i_clk_i=self.target.clk,
+            i_rstn_i=self.target.rstn,
+            o_addr_o=self.target.addr,
+            o_wdata_o=self.target.wdata,
+            o_wen_o=self.target.wen,
+            o_ren_o=self.target.ren,
+            i_rdata_i=self.target.rdata,
+            i_err_i=self.target.err,
+            i_ack_i=self.target.ack,
+        )
+        self.comb += [
+            self.target.clk.eq(ClockSignal(cd_target)),
+            self.target.rstn.eq(~ResetSignal(cd_target)),
+        ]
+
+
+class Sys2CSR(Module):
+    def __init__(self):
+        self.csr = csr_bus.Interface()
+        self.sys = Record(sys_layout)
+
+        ###
+
+        stb = Signal()
+        self.sync += [
+            stb.eq(self.sys.wen | self.sys.ren),
+            self.csr.adr.eq(self.sys.addr[2:]),
+            self.csr.we.eq(self.sys.wen),
+            self.csr.dat_w.eq(self.sys.wdata),
+            self.sys.ack.eq(stb),
+            self.sys.rdata.eq(self.csr.dat_r),
+        ]

fast-servo/linien-gateware/cores/ps7.py

@@ -0,0 +1,193 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from migen import *
+
+
+class PS7(Module):
+    def __init__(self, platform, ps7_name=None):
+        self.frstn = Signal()
+        self.ps7_tcl = []
+        self.platform = platform
+
+        self.ps7_name = "Zynq" if ps7_name is None else ps7_name
+
+        ps7_clk         =   platform.request("ps7_clk")
+        ps7_porb        =   platform.request("ps7_porb")
+        ps7_srstb       =   platform.request("ps7_srstb")
+        ps7_mio         =   platform.request("ps7_mio")
+        ps7_ddram       =   platform.request("ps7_ddram")
+
+        self.cpu_params = dict(
+            # Clk / Rst.
+            io_PS_CLK       = ps7_clk,
+            io_PS_PORB      = ps7_porb,
+            io_PS_SRSTB     = ps7_srstb,
+
+            # MIO.
+            io_MIO          = ps7_mio,
+
+            # DDRAM.
+            io_DDR_Addr     = ps7_ddram.addr,
+            io_DDR_BankAddr = ps7_ddram.ba,
+            io_DDR_CAS_n    = ps7_ddram.cas_n,
+            io_DDR_Clk_n    = ps7_ddram.ck_n,
+            io_DDR_Clk      = ps7_ddram.ck_p,
+            io_DDR_CKE      = ps7_ddram.cke,
+            io_DDR_CS_n     = ps7_ddram.cs_n,
+            io_DDR_DM       = ps7_ddram.dm,
+            io_DDR_DQ       = ps7_ddram.dq,
+            io_DDR_DQS_n    = ps7_ddram.dqs_n,
+            io_DDR_DQS      = ps7_ddram.dqs_p,
+            io_DDR_ODT      = ps7_ddram.odt,
+            io_DDR_RAS_n    = ps7_ddram.ras_n,
+            io_DDR_DRSTB    = ps7_ddram.reset_n,
+            io_DDR_WEB      = ps7_ddram.we_n,
+            io_DDR_VRN      = ps7_ddram.vrn,
+            io_DDR_VRP      = ps7_ddram.vrp,
+
+            # USB0.
+            # i_USB0_VBUS_PWRFAULT = 0,
+
+            # Fabric Clk / Rst.
+            # o_FCLK_CLK0     = ClockSignal("ps7"),
+            o_FCLK_RESET0_N = self.frstn
+        )
+
+        self.set_ps7(name=self.ps7_name,
+            config={
+                **self.platform.ps7_config
+            })
+
+    def add_ps7_config(self, config):
+        # Config must be provided as a config, value dict.
+        assert isinstance(config, dict)
+        # Add configs to PS7.
+        self.ps7_tcl.append("set_property -dict [list \\")
+        for config, value in config.items():
+            self.ps7_tcl.append("CONFIG.{} {} \\".format(config, '{{' + str(value) + '}}'))
+        self.ps7_tcl.append(f"] [get_ips {self.ps7_name}]")
+
+    def set_ps7(self, name=None, config=None, preset=None):
+        self.ps7_name = name
+        self.ps7_tcl.append(f"set ps7 [create_ip -vendor xilinx.com -name processing_system7 -module_name {self.ps7_name}]")
+        self.add_ps7_config(config)
+
+    def add_axi_gp_master(self, interface):
+        # assert type(interface) is Axi2Sys
+
+        axi_interface = interface
+
+        self.cpu_params.update({
+            # AXI GP clk.
+            f"i_M_AXI_GP0_ACLK"    : axi_interface.aclk,
+
+            # AXI GP aw.
+            f"o_M_AXI_GP0_AWVALID" : axi_interface.awvalid,
+            f"i_M_AXI_GP0_AWREADY" : axi_interface.awready,
+            f"o_M_AXI_GP0_AWADDR"  : axi_interface.awaddr,
+            f"o_M_AXI_GP0_AWBURST" : axi_interface.awburst,
+            f"o_M_AXI_GP0_AWLEN"   : axi_interface.awlen,
+            f"o_M_AXI_GP0_AWSIZE"  : axi_interface.awsize,
+            f"o_M_AXI_GP0_AWID"    : axi_interface.awid,
+            f"o_M_AXI_GP0_AWLOCK"  : axi_interface.awlock,
+            f"o_M_AXI_GP0_AWPROT"  : axi_interface.awprot,
+            f"o_M_AXI_GP0_AWCACHE" : axi_interface.awcache,
+            f"o_M_AXI_GP0_AWQOS"   : axi_interface.awqos,
+
+            # AXI GP w.
+            f"o_M_AXI_GP0_WVALID"  : axi_interface.wvalid,
+            f"o_M_AXI_GP0_WLAST"   : axi_interface.wlast,
+            f"i_M_AXI_GP0_WREADY"  : axi_interface.wready,
+            f"o_M_AXI_GP0_WID"     : axi_interface.wid,
+            f"o_M_AXI_GP0_WDATA"   : axi_interface.wdata,
+            f"o_M_AXI_GP0_WSTRB"   : axi_interface.wstrb,
+
+            # AXI GP b.
+            f"i_M_AXI_GP0_BVALID"  : axi_interface.bvalid,
+            f"o_M_AXI_GP0_BREADY"  : axi_interface.bready,
+            f"i_M_AXI_GP0_BID"     : axi_interface.bid,
+            f"i_M_AXI_GP0_BRESP"   : axi_interface.bresp,
+
+            # AXI GP ar.
+            f"o_M_AXI_GP0_ARVALID" : axi_interface.arvalid,
+            f"i_M_AXI_GP0_ARREADY" : axi_interface.arready,
+            f"o_M_AXI_GP0_ARADDR"  : axi_interface.araddr,
+            f"o_M_AXI_GP0_ARBURST" : axi_interface.arburst,
+            f"o_M_AXI_GP0_ARLEN"   : axi_interface.arlen,
+            f"o_M_AXI_GP0_ARID"    : axi_interface.arid,
+            f"o_M_AXI_GP0_ARLOCK"  : axi_interface.arlock,
+            f"o_M_AXI_GP0_ARSIZE"  : axi_interface.arsize,
+            f"o_M_AXI_GP0_ARPROT"  : axi_interface.arprot,
+            f"o_M_AXI_GP0_ARCACHE" : axi_interface.arcache,
+            f"o_M_AXI_GP0_ARQOS"   : axi_interface.arqos,
+
+            # AXI GP r.
+            f"i_M_AXI_GP0_RVALID"  : axi_interface.rvalid,
+            f"o_M_AXI_GP0_RREADY"  : axi_interface.rready,
+            f"i_M_AXI_GP0_RLAST"   : axi_interface.rlast,
+            f"i_M_AXI_GP0_RID"     : axi_interface.rid,
+            f"i_M_AXI_GP0_RRESP"   : axi_interface.rresp,
+            f"i_M_AXI_GP0_RDATA"   : axi_interface.rdata,
+        })
+    
+    def add_i2c_emio(self, platform, i2c_name, i2c_number):
+        ps7_i2c_pads = platform.request(i2c_name, i2c_number) #, loose=True)
+        if ps7_i2c_pads is not None:
+            o_i2c_scl = Signal()
+            i_i2c_scl = Signal()
+            t_i2c_scl = Signal()
+            o_i2c_sda = Signal()
+            i_i2c_sda = Signal()
+            t_i2c_sda = Signal()
+
+            self.specials += Instance("IOBUF", 
+                i_T     = t_i2c_sda,
+                i_I     = o_i2c_sda,
+                io_IO   = ps7_i2c_pads.sda,
+                o_O     = i_i2c_sda,
+            )
+
+            self.specials += Instance("IOBUF",
+                i_T     = t_i2c_scl,
+                i_I     = o_i2c_scl,
+                io_IO   = ps7_i2c_pads.scl,
+                o_O     = i_i2c_scl,
+            )
+
+            self.cpu_params.update({
+                f"i_I2C{i2c_number}_SCL_I"    : i_i2c_scl,
+                f"o_I2C{i2c_number}_SCL_T"    : t_i2c_scl,
+                f"o_I2C{i2c_number}_SCL_O"    : o_i2c_scl,
+
+                f"i_I2C{i2c_number}_SDA_I"    : i_i2c_sda,
+                f"o_I2C{i2c_number}_SDA_T"    : t_i2c_sda,
+                f"o_I2C{i2c_number}_SDA_O"    : o_i2c_sda,
+            })
+
+    def do_finalize(self):
+        if len(self.ps7_tcl):
+            self.ps7_tcl += [
+                f"upgrade_ip [get_ips {self.ps7_name}]",
+                f"generate_target all [get_ips {self.ps7_name}]",
+                f"synth_ip [get_ips {self.ps7_name}]"
+            ]
+            self.platform.toolchain.pre_synthesis_commands += self.ps7_tcl
+
+        self.specials += Instance(self.ps7_name, **self.cpu_params)

fast-servo/linien-gateware/cores/spi_phy.py

@@ -0,0 +1,141 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from enum import Enum
+
+from migen import *
+
+
+class SpiInterface(Enum):
+    ADC = 0
+    DAC = 1
+
+
+class SpiPhy(Module):
+    def __init__(self, spi_type, ps7_spi_pads):
+        assert isinstance(spi_type, SpiInterface)
+
+        self.ps_ss = Signal(3, reset_less=True)
+        
+        self.ps_miso_o = Signal()
+        self.ps_miso_t = Signal()
+        self.ps_mosi_o = Signal()
+        self.ps_mosi_t = Signal()
+        self.ps_sclk_o = Signal()
+        self.ps_sclk_t = Signal()
+        self.ps_sclk_i = Signal()
+        self.ps_mosi_i = Signal()
+        self.ps_miso_i = Signal()
+        self.ps_ss_i = Signal()
+        self.ps_ss_t = Signal()
+
+        if spi_type.name == "ADC":
+
+            cs_translated = Signal(4, reset_less=True)
+            
+            main_adc_miso = Signal(reset_less=True)
+            aux_adc_miso_a = Signal(reset_less=True)
+            aux_adc_miso_b = Signal(reset_less=True)
+            aux_dac_miso = Signal(reset_less=True)
+
+            miso_signals = [main_adc_miso, aux_adc_miso_a, aux_adc_miso_b, aux_dac_miso]
+        
+            # MAIN ADC
+            self.specials += Instance("OBUFT", i_I=self.ps_sclk_o, i_T=self.ps_sclk_t, o_O=ps7_spi_pads.sclk) 
+            self.specials += Instance("OBUFT", i_I=self.ps_mosi_o, i_T=self.ps_mosi_t, o_O=ps7_spi_pads.mosi) 
+            self.specials += Instance("IBUF", i_I=ps7_spi_pads.miso, o_O=main_adc_miso)
+
+            # AUX ADC
+            self.specials += Instance("OBUFT", i_I=self.ps_sclk_o, i_T=self.ps_sclk_t, o_O=ps7_spi_pads.aux_adc_sclk)
+            self.specials += Instance("IBUF", i_I=ps7_spi_pads.aux_adc_miso_a, o_O=aux_adc_miso_a)
+            self.specials += Instance("IBUF", i_I=ps7_spi_pads.aux_adc_miso_b, o_O=aux_adc_miso_b)
+
+            # AUX DAC
+            self.specials += Instance("OBUFT", i_I=self.ps_sclk_o, i_T=self.ps_sclk_t, o_O=ps7_spi_pads.aux_dac_sclk)
+            self.specials += Instance("OBUFT", i_I=self.ps_mosi_o, i_T=self.ps_mosi_t, o_O=ps7_spi_pads.aux_dac_mosi)
+            self.specials += Instance("IBUF", i_I=ps7_spi_pads.aux_dac_miso, o_O=aux_dac_miso)
+
+            cases = {}
+            # for i in range(4):
+            #     case_mask = ~(1 << i) & 0xF
+            #     print(f"Case mask: 0b{case_mask:04b}")
+            #     cases[i + 1] = [
+            #         cs_translated.eq(case_mask),
+            #         self.ps_miso_i.eq(miso_signals[i])
+            #     ]
+
+            cases[0b001] = [
+                cs_translated.eq(0b1110),
+                self.ps_miso_i.eq(main_adc_miso),
+            ]
+
+            cases[0b010] = [
+                cs_translated.eq(0b1101),
+                self.ps_miso_i.eq(aux_adc_miso_a),
+            ]
+
+            cases[0b011] = [
+                cs_translated.eq(0b1011),
+                self.ps_miso_i.eq(aux_adc_miso_b),
+            ]
+            cases[0b100] = [
+                cs_translated.eq(0b0111),
+                self.ps_miso_i.eq(aux_dac_miso),
+            ]
+
+            cases["default"] = [
+                cs_translated.eq(0b1111),
+                self.ps_miso_i.eq(0b1),
+            ]
+
+            self.comb += [
+                self.ps_ss_i.eq(1),
+                Case(self.ps_ss, cases),
+               
+                ps7_spi_pads.cs.eq(cs_translated[0]),
+
+                # only one CS line physically available to AUX ADC
+                ps7_spi_pads.aux_adc_cs.eq(cs_translated[1] & cs_translated[2]),
+                ps7_spi_pads.aux_dac_miso.eq(cs_translated[3]),
+            
+            ]
+        else:
+            self.specials += Instance(
+                "spi2threewire",
+                o_ps_sclk_i     =   self.ps_sclk_i,
+                i_ps_sclk_o     =   self.ps_sclk_o,
+                i_ps_sclk_t     =   self.ps_sclk_t,
+
+                o_ps_mosi_i     =   self.ps_mosi_i,
+                i_ps_mosi_o     =   self.ps_mosi_o,
+                i_ps_mosi_t     =   self.ps_mosi_t,
+
+                o_ps_miso_i     =   self.ps_miso_i,
+                i_ps_miso_o     =   self.ps_miso_o,
+                i_ps_miso_t     =   self.ps_miso_t,
+
+                o_ps_ss_i       =   self.ps_ss_i,
+                i_ps_ss         =   self.ps_ss,
+                i_ps_ss_t       =   self.ps_ss_t,
+
+                o_o_ss          =   ps7_spi_pads.cs,
+                o_o_sclk        =   ps7_spi_pads.sclk,
+                io_sdio         =   ps7_spi_pads.sdio,
+            )
+

fast-servo/linien-gateware/fast_servo_platform.py

@@ -0,0 +1,336 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2022-2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+from migen.build.generic_platform import *
+from migen.build.xilinx import XilinxPlatform
+
+import os
+from fast_servo.gateware import verilog_dir
+
+
+# IOs ----------------------------------------------------------------------------------------------
+
+
+_io = [
+    # Front panel LEDs
+    ("fp_led", 0, Pins("G7"), IOStandard("LVCMOS25")),
+    ("fp_led", 1, Pins("G8"), IOStandard("LVCMOS25")),
+    ("fp_led", 2, Pins("G2"), IOStandard("LVCMOS25")),
+    ("fp_led", 3, Pins("G3"), IOStandard("LVCMOS25")),
+
+    # LEDs
+    ("user_led", 0, Pins("AB16"), IOStandard("LVCMOS33")),
+    ("user_led", 1, Pins("AA14"), IOStandard("LVCMOS33")),
+    ("user_led", 2, Pins("AA15"), IOStandard("LVCMOS33")),
+
+    # ETH LEDs
+    ("eth_led", 0, Pins("V11"), IOStandard("LVCMOS33")),
+    ("eth_led", 1, Pins("U13"), IOStandard("LVCMOS33")),
+
+    ("from_eth_phy", 0, Pins("J3"), IOStandard("LVCMOS18")),
+    ("from_eth_phy", 1, Pins("K8"), IOStandard("LVCMOS18")),
+
+
+    # CLK 100 MHz from oscillator
+    ("clk100", 0, Pins("Y14"), IOStandard("LVCMOS33")),
+
+    # MGT clk from on-board Si5338A
+    ("mgt_clk1", 0,
+        Subsignal("p", Pins("U5")),
+        Subsignal("n", Pins("V5")),
+        IOStandard("LVDS_25"),
+    ),
+
+    # FCLK125 from on-board Si5338A
+    ("fclk125", 0, Pins("K2"), IOStandard("LVCMOS18")),
+
+    # # ADC CLK
+    # ("fpga_clk", 0,
+    #     Subsignal("p", Pins("C6")),
+    #     Subsignal("n", Pins("C5")),
+    #     IOStandard("LVDS_25"),
+    # ),
+
+    # DAC CLK
+    ("fpga_clk", 1,
+        Subsignal("p", Pins("J7")),
+        Subsignal("n", Pins("J6")),
+        IOStandard("LVDS_25"),
+    ),
+
+    # MAIN ADC LT2195
+    ("adc", 0, 
+        Subsignal("data0_p", Pins("F7 B7 E4 D1"), IOStandard("LVDS_25")),
+        Subsignal("data0_n", Pins("E7 B6 E3 C1"), IOStandard("LVDS_25")),
+        Subsignal("data1_p", Pins("A2 D5 F2 D7"), IOStandard("LVDS_25")),
+        Subsignal("data1_n", Pins("A1 C4 F1 D6"), IOStandard("LVDS_25")),
+        Subsignal("dco_p", Pins("B4"), IOStandard("LVDS_25")),
+        Subsignal("dco_n", Pins("B3"), IOStandard("LVDS_25")),
+        Subsignal("frame_p", Pins("B2"), IOStandard("LVDS_25")),
+        Subsignal("frame_n", Pins("B1"), IOStandard("LVDS_25"))
+    ),
+
+    # ADC AFE
+    ("adc_afe", 0,
+        Subsignal("ch1_gain", Pins("AA12"), IOStandard("LVCMOS33")),
+        Subsignal("ch2_gain", Pins("AB11"), IOStandard("LVCMOS33")),
+        Subsignal("nshdn_ch1", Pins("G4"), IOStandard("LVCMOS25")),
+        Subsignal("nshdn_ch2", Pins("F4"), IOStandard("LVCMOS25")),
+    ),
+    
+    # P5 R5 N1 N4 L2 P6 N3 R4 P1 L1 M3 M4 U2 T2
+    # MAIN DAC AD9117
+    ("dac", 0,
+        Subsignal("data", 
+            Pins("T2 U2 M4 M3 L1 P1 R4 N3 P6 L2 N4 N1 R5 P5"),
+            IOStandard("LVCMOS18")),
+        Subsignal("dclkio", Pins("U1"), IOStandard("LVCMOS18")),
+        Subsignal("rst", Pins("T1"), IOStandard("LVCMOS18")),
+    ),
+
+    # DAC AFE
+    ("dac_afe", 0,
+        Subsignal("ch1_pd_n", Pins("L5")),
+        Subsignal("ch2_pd_n", Pins("L4")),
+        IOStandard("LVCMOS18"),
+    ),
+
+    # AUXILIARY ADC
+    ("aux_adc", 0,
+        Subsignal("diff_n", Pins("W18")),
+        Subsignal("a", Pins("AB18 AB19 W17")),
+        Subsignal("range", Pins("U19")),
+        IOStandard("LVCMOS33")
+    ),
+
+    # AUXILIARY DAC
+    ("aux_dac", 0,
+        Subsignal("nclr", Pins("V19")),
+        Subsignal("bin", Pins("AA19")),
+        Subsignal("nldac", Pins("AB21")),
+        IOStandard("LVCMOS33")
+    ),
+
+    # ADC SPI
+    ("spi", 0,
+        Subsignal("sclk", Pins("J1"), IOStandard("LVCMOS18")),
+        Subsignal("mosi", Pins("J5"), IOStandard("LVCMOS18")),
+        Subsignal("miso", Pins("K5"), IOStandard("LVCMOS18")),
+        Subsignal("cs", Pins("J2"), IOStandard("LVCMOS18")),
+        Subsignal("aux_adc_sclk", Pins("AB22"), IOStandard("LVCMOS33")),
+        Subsignal("aux_adc_miso_a", Pins("Y18"), IOStandard("LVCMOS33")),
+        Subsignal("aux_adc_miso_b", Pins("AA16"), IOStandard("LVCMOS33")),
+        Subsignal("aux_adc_cs", Pins("Y19"), IOStandard("LVCMOS33")),
+        Subsignal("aux_dac_sclk", Pins("V18"), IOStandard("LVCMOS33")),
+        Subsignal("aux_dac_mosi", Pins("U17"), IOStandard("LVCMOS33")),
+        Subsignal("aux_dac_miso", Pins("U18"), IOStandard("LVCMOS33")),
+        Subsignal("aux_dac_cs", Pins("AA20"), IOStandard("LVCMOS33")),
+    ),
+
+    # DAC SPI
+    ("spi", 1,
+        Subsignal("sclk", Pins("K3"), IOStandard("LVCMOS18")),
+        Subsignal("sdio", Pins("R2"), IOStandard("LVCMOS18")),
+        Subsignal("cs", Pins("R3"), IOStandard("LVCMOS18")),
+        # Subsignal("sclk_aux", Pins("V18"), IOStandard("LVCMOS33")),
+        # Subsignal("mosi_aux", Pins("U17"), IOStandard("LVCMOS33")),
+        # Subsignal("miso_aux", Pins("U18"), IOStandard("LVCMOS33")),
+        # Subsignal("cs_aux", Pins("AA20"), IOStandard("LVCMOS33")),
+    ),
+    #Pins("Y15 AB14 AB13 V13 V14 V15 U12 W13 W12 R17 W15 AB17 Y12 Y13 V16 W16 AA17 Y17"),
+    ("gpio", 0,
+        Subsignal("n", Pins("Y15 AB14 AB13 V13 V14 V15 U12 W13"), IOStandard("LVCMOS33")),
+        Subsignal("p", Pins("W12 R17 W15 AB17 Y12 Y13 V16 W16"), IOStandard("LVCMOS33")),
+    ),
+
+    # PS7
+    ("ps7_clk",   0, Pins("_" * 1)),
+    ("ps7_porb",  0, Pins("_" * 1)),
+    ("ps7_srstb", 0, Pins("_" * 1)),
+    ("ps7_mio",   0, Pins("_" * 54)),
+    ("ps7_ddram", 0,
+        Subsignal("addr",    Pins("_" * 15)),
+        Subsignal("ba",      Pins("_" * 3)),
+        Subsignal("cas_n",   Pins("_" * 1)),
+        Subsignal("ck_n",    Pins("_" * 1)),
+        Subsignal("ck_p",    Pins("_" * 1)),
+        Subsignal("cke",     Pins("_" * 1)),
+        Subsignal("cs_n",    Pins("_" * 1)),
+        Subsignal("dm",      Pins("_" * 4)),
+        Subsignal("dq",      Pins("_" * 32)),
+        Subsignal("dqs_n",   Pins("_" * 4)),
+        Subsignal("dqs_p",   Pins("_" * 4)),
+        Subsignal("odt",     Pins("_" * 1)),
+        Subsignal("ras_n",   Pins("_" * 1)),
+        Subsignal("reset_n", Pins("_" * 1)),
+        Subsignal("we_n",    Pins("_" * 1)),
+        Subsignal("vrn",     Pins("_" * 1)),
+        Subsignal("vrp",     Pins("_" * 1)),
+
+    ),
+
+    # I2C0 to Si5340 on Fast Servo
+    ("ps7_i2c", 0,
+        Subsignal("sda", Pins("M2")),
+        Subsignal("scl", Pins("M1")),
+        IOStandard("LVCMOS18")
+    ),
+
+    # Si540 nRST
+    ("nrst", 0, Pins("M7"), IOStandard("LVCMOS18")),
+
+]
+
+
+
+_connector_eem = [
+    ("eem", {
+        "d0_cc_n": "C3",
+        "d0_cc_p": "D3",
+        "d1_n": "A4",
+        "d1_p": "A5",
+        "d2_n": "F6",
+        "d2_p": "G6",
+        "d3_n": "A6",
+        "d3_p": "A7",
+        "d4_n": "E5",
+        "d4_p": "F5",
+        "d5_n": "H3",
+        "d5_p": "H4",
+        "d6_n": "B8",
+        "d6_p": "C8",
+        "d7_n": "D8",
+        "d7_p": "E8",
+    }),
+]
+
+_connector_gpio = [
+    ("gpio", {
+        "qspi_io3": "Y15",
+        "qspi_io2": "AB14",
+        "qspi_io1": "AB13",
+        "qspi_io0": "V13",
+        "qspi_clk": "V14",
+        "qspi_ncs": "V15",
+        "hrtim_che1": "U12",
+        "hrtim_che2": "W13",
+        "hrtim_cha1": "W12",
+        "hrtim_cha2": "R17",
+        "lptim2_out": "W15",
+        "uart4_tx": "AB17",
+        "spi1_mosi": "Y12",
+        "spi1_miso": "Y13",
+        "spi1_nss": "V16",
+        "spi1_sck": "W16",
+        "i2c1_sda": "AA17",
+        "i2c1_scl": "Y17",
+    })
+]
+
+# PS7 config ---------------------------------------------------------------------------------------
+
+ps7_config_board_preset = {
+    "PCW_PRESET_BANK0_VOLTAGE"          : "LVCMOS 3.3V",
+    "PCW_PRESET_BANK1_VOLTAGE"          : "LVCMOS 1.8V",
+    "PCW_CRYSTAL_PERIPHERAL_FREQMHZ"    : "33.333333",
+    "PCW_QSPI_PERIPHERAL_ENABLE"        : "1",
+    "PCW_QSPI_GRP_SINGLE_SS_ENABLE"     : "1",
+    "PCW_SINGLE_QSPI_DATA_MODE"         : "x4",
+    "PCW_QSPI_QSPI_IO"                  : "MIO 1 .. 6",
+    "PCW_QSPI_GRP_FBCLK_ENABLE"         : "1",
+
+    # SD Card
+    "PCW_SD0_PERIPHERAL_ENABLE"         : "1",
+    "PCW_SD0_SD0_IO"                    : "MIO 40 .. 45",
+    "PCW_MIO_40_PULLUP"                 : "disabled",
+    "PCW_MIO_41_PULLUP"                 : "disabled",
+    "PCW_MIO_42_PULLUP"                 : "disabled",
+    "PCW_MIO_43_PULLUP"                 : "disabled",
+    "PCW_MIO_44_PULLUP"                 : "disabled",
+    "PCW_MIO_45_PULLUP"                 : "disabled",
+    
+    # UART
+    "PCW_UART0_PERIPHERAL_ENABLE"       : "1",
+    "PCW_UART0_UART0_IO"                : "MIO 10 .. 11",
+
+    # ETHERNET
+    "PCW_ACT_ENET0_PERIPHERAL_FREQMHZ"  : "125",
+    "PCW_ENET0_PERIPHERAL_CLKSRC"       : "ARM PLL",
+    "PCW_ENET0_PERIPHERAL_ENABLE"       : "1",
+    "PCW_ENET0_ENET0_IO"                : "MIO 16 .. 27",
+    "PCW_ENET0_GRP_MDIO_ENABLE"         : "1",
+    "PCW_ENET0_GRP_MDIO_IO"             : "MIO 52 .. 53",
+    "PCW_ENET_RESET_ENABLE"             : "1",
+    "PCW_ENET0_RESET_ENABLE"            : "1",
+    "PCW_ENET0_RESET_IO"                : "MIO 50",
+
+    # USB
+    "PCW_USB0_PERIPHERAL_ENABLE"        : "1",
+    "PCW_USB0_USB0_IO"                  : "MIO 28 .. 39",
+    "PCW_USB_RESET_ENABLE"              : "1",
+    "PCW_USB0_RESET_ENABLE"             : "1",
+    "PCW_USB0_RESET_IO"                 : "MIO 51",
+
+    "PCW_WDT_PERIPHERAL_ENABLE"         : "1",
+    "PCW_TTC0_PERIPHERAL_ENABLE"        : "1",      # TTC0 required for Linux
+
+    # I2C
+    "PCW_I2C_RESET_ENABLE"              : "0",
+    "PCW_I2C_RESET_POLARITY"            : "Active Low",
+
+    # I2C0
+    "PCW_I2C0_I2C0_IO"                  : "EMIO",
+    "PCW_I2C0_PERIPHERAL_ENABLE"        : "1",
+    "PCW_I2C0_GRP_INT_ENABLE"           : "1",
+    "PCW_I2C0_GRP_INT_IO"               : "EMIO",
+
+    # I2C1
+    "PCW_I2C1_PERIPHERAL_ENABLE"        : "1",
+    "PCW_I2C1_I2C1_IO"                  : "MIO 48 .. 49",
+    "PCW_I2C1_I2C1_IO"                  : "MIO 12 .. 13",
+    "PCW_I2C1_PERIPHERAL_ENABLE"        : "1",
+
+    "PCW_UIPARAM_DDR_MEMORY_TYPE"       : "DDR 3 (Low Voltage)",
+    "PCW_UIPARAM_DDR_PARTNO"            : "MT41J256M16 RE-125",
+    "PCW_GPIO_MIO_GPIO_ENABLE"          : "1",
+
+    "PCW_FPGA0_PERIPHERAL_FREQMHZ"      : "100",
+    "PCW_EN_CLK0_PORT"                  : "0",              # dont use FCLK0 
+}
+
+class Platform(XilinxPlatform):
+    default_clk_name = "clk100"
+    default_clk_period = 10.0
+
+    def __init__(self):
+        XilinxPlatform.__init__(self, "xc7z015-clg485-1", _io, _connector_gpio + _connector_eem, toolchain="vivado")
+        ps7_config = ps7_config_board_preset
+        self.ps7_config = ps7_config
+
+        verilog_sources = os.listdir(verilog_dir)
+        self.add_sources(verilog_dir, *verilog_sources)
+
+    def do_finalize(self, fragment):
+        try:
+            XilinxPlatform.do_finalize(self, fragment)
+            self.add_period_constraint(self.lookup_request(self.default_clk_name, loose=True), self.default_clk_period)
+        except ValueError:
+            pass
+        except ConstraintError:
+            pass

fast-servo/linien-gateware/fast_servo_soc.py

@@ -0,0 +1,290 @@
+# This file is part of Fast Servo Software Package.
+#
+# Copyright (C) 2023 Jakub Matyas
+# Warsaw University of Technology <jakubk.m@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program 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
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import os
+
+from migen import *
+from misoc.interconnect import csr_bus
+from misoc.interconnect.csr import AutoCSR, CSRStorage
+
+from fast_servo.gateware.cores.adc import ADC, AUX_ADC_CTRL
+from fast_servo.gateware.cores.dac import AUX_DAC_CTRL, DAC
+from fast_servo.gateware.cores.pitaya_ps import Axi2Sys, Sys2CSR, SysCDC, SysInterconnect
+from fast_servo.gateware.cores.ps7 import PS7
+from fast_servo.gateware.cores.spi_phy import SpiInterface, SpiPhy
+
+
+class CRG(Module):
+    def __init__(self, platform):
+        self.ps_rst         = Signal()
+        self.locked         = Signal()
+        self.clock_domains.cd_sys         = ClockDomain()
+        self.clock_domains.cd_sys_double  = ClockDomain()
+        self.clock_domains.cd_idelay      = ClockDomain()
+
+        # # #
+
+        # Clk.
+        clk100 = platform.request("clk100")
+        platform.add_period_constraint(clk100, 10.0)
+        self.clkin = clk100
+        clk100_buf = Signal()
+        self.specials += Instance("IBUFG", i_I=clk100, o_O=clk100_buf)
+
+        clk_feedback = Signal()
+        clk_feedback_buf = Signal()
+
+        clk_sys = Signal()
+        clk_idelay = Signal()
+
+        self.specials += [
+            Instance(
+                "PLLE2_BASE",
+                p_BANDWIDTH="OPTIMIZED",
+                p_DIVCLK_DIVIDE=1,
+                p_CLKFBOUT_PHASE=0.0,
+                p_CLKFBOUT_MULT=10,
+                p_CLKIN1_PERIOD=10.0,
+                p_REF_JITTER1=0.01,
+                p_STARTUP_WAIT="FALSE",
+                i_CLKIN1=clk100_buf,
+                i_PWRDWN=0,
+                i_RST=self.ps_rst,
+                i_CLKFBIN=clk_feedback_buf,
+                o_CLKFBOUT=clk_feedback,
+                p_CLKOUT0_DIVIDE=10,
+                p_CLKOUT0_PHASE=0.0,
+                p_CLKOUT0_DUTY_CYCLE=0.5,
+                o_CLKOUT0=clk_sys,           # 100 MHz <- sys_clk
+                p_CLKOUT1_DIVIDE=5,
+                p_CLKOUT1_PHASE=0.0,
+                p_CLKOUT1_DUTY_CYCLE=0.5,
+                o_CLKOUT1=clk_idelay,       # 200 MHZ <- 2 * sys_clk = 2*100 MHz
+                o_LOCKED=self.locked,
+            )
+        ]
+
+        self.specials += Instance("BUFG", i_I=clk_feedback, o_O=clk_feedback_buf)
+        self.specials += Instance("BUFG", i_I=clk_sys, o_O=self.cd_sys.clk)
+        self.specials += Instance("BUFG", i_I=clk_idelay, o_O=self.cd_idelay.clk)
+        self.specials += Instance("BUFG", i_I=clk_idelay, o_O=self.cd_sys_double.clk)
+
+
+        # Ignore sys_clk to pll clkin path created by SoC's rst.
+        platform.add_false_path_constraints(self.cd_sys.clk, self.clkin)
+
+        self.specials += Instance("FD", p_INIT=1, i_D=~self.locked, i_C=self.cd_sys.clk, o_Q=self.cd_sys.rst)
+
+
+class BaseSoC(PS7, AutoCSR):
+    def __init__(self, platform, passthrouh=False):
+        PS7.__init__(self, platform)
+
+        # TODO: 
+        # LINIEN SPECIFIC csr_map - in the future should be moved
+        # to csr_devices list
+        self.csr_map = {
+            "adc": 9,
+            "fp_led0": 10,
+            "fp_led1": 11,
+            "fp_led2": 12,
+            "fp_led3": 13,
+            "dac": 14,
+            "adc_aux_ctrl": 15,
+            "dac_aux_ctrl": 16,
+        }
+        self.soc_name = "FastServo"
+        self.interconnect_slaves = []
+        self.csr_devices = []
+        
+        self.platform = platform
+
+        self.submodules.crg = CRG(platform)
+
+        # # # AXI to system bus bridge
+        self.submodules.axi2sys = Axi2Sys()
+        self.submodules.sys2csr = Sys2CSR()
+        self.submodules.syscdc = SysCDC()
+        self.add_axi_gp_master(self.axi2sys.axi)
+
+        self.comb += [
+            self.axi2sys.axi.aclk.eq(ClockSignal("sys")),
+            self.axi2sys.axi.arstn.eq(self.frstn),
+            self.syscdc.target.connect(self.sys2csr.sys),
+        ]
+        
+        # ETH LEDS
+        self.comb += [
+            platform.request("eth_led", 0).eq(platform.request("from_eth_phy", 0)),
+            platform.request("eth_led", 1).eq(platform.request("from_eth_phy", 1)),
+        ]
+
+        # I2C0 to Si5340 on Fast Servo
+        self.add_i2c_emio(platform, "ps7_i2c", 0)
+
+        # SPI0 - interface to main ADC and auxiliary ADC
+        self.add_spi_interface(platform, SpiInterface.ADC)
+
+        # SPI1 - interface to main DAC and auxiliary DAC
+        self.add_spi_interface(platform, SpiInterface.DAC)
+
+        # self.add_main_adc(platform)
+        self.submodules.adc = ADC(platform)
+        self.csr_devices.append("adc")
+
+        # self.add_main_dac(platform)
+        self.submodules.dac = DAC(platform)
+        self.csr_devices.append("dac")
+        
+        # DEBUG
+        if passthrouh:
+            DAC_DATA_WIDTH = 14
+            for ch in range(2):
+                saturate = Signal()
+                adc_signal = self.adc.data_out[ch]
+                self.comb += [
+                    saturate.eq(adc_signal[-3:] != Replicate(adc_signal[-1], 3)),
+                    self.dac.data_in[ch].eq(Mux(saturate,
+                            Cat(Replicate(~adc_signal[-1], DAC_DATA_WIDTH-1), adc_signal[-1]),
+                            adc_signal[:-2]))
+                ]
+
+        si_5340_nrst = platform.request("nrst")
+        self.comb += si_5340_nrst.eq(1)
+
+        for i in range(4):
+            led_pin = platform.request("fp_led", i)
+            setattr(self.submodules, f"fp_led{i}", LED(led_pin))
+            self.csr_devices.append(f"fp_led{i}")
+
+        self.submodules.adc_aux_ctrl = AUX_ADC_CTRL(platform)
+        self.csr_devices.append("adc_aux_ctrl")
+
+        self.submodules.dac_aux_ctrl = AUX_DAC_CTRL(platform)
+        self.csr_devices.append("dac_aux_ctrl")
+
+    def add_spi_interface(self, platform, spi_type):
+        assert isinstance(spi_type, SpiInterface)
+        n = spi_type.value
+
+        ps7_spi_pads = platform.request("spi", spi_type.value)
+        spi_phy = SpiPhy(spi_type, ps7_spi_pads)
+        self.submodules += spi_phy
+
+        ps7_config_spi = {
+            f"PCW_SPI{n}_GRP_SS0_ENABLE"       : "1",
+            f"PCW_SPI{n}_GRP_SS0_IO"           : "EMIO",
+            f"PCW_SPI{n}_GRP_SS1_ENABLE"       : "1",
+            f"PCW_SPI{n}_GRP_SS1_IO"           : "EMIO",
+            f"PCW_SPI{n}_GRP_SS2_ENABLE"       : "1",
+            f"PCW_SPI{n}_GRP_SS2_IO"           : "EMIO",
+            f"PCW_SPI{n}_PERIPHERAL_ENABLE"    : "1",
+            f"PCW_SPI{n}_SPI{n}_IO"              : "EMIO",
+            f"PCW_SPI_PERIPHERAL_CLKSRC"     : "IO PLL",
+            f"PCW_SPI_PERIPHERAL_DIVISOR0"   : "10",
+            f"PCW_SPI_PERIPHERAL_FREQMHZ"    : "166.666666",
+        }
+        self.add_ps7_config(ps7_config_spi)
+
+        self.cpu_params.update({
+            f"o_SPI{n}_MISO_O"      : spi_phy.ps_miso_o,
+            f"o_SPI{n}_MISO_T"      : spi_phy.ps_miso_t,
+            f"o_SPI{n}_MOSI_O"      : spi_phy.ps_mosi_o,
+            f"o_SPI{n}_MOSI_T"      : spi_phy.ps_mosi_t,
+            f"o_SPI{n}_SCLK_O"      : spi_phy.ps_sclk_o,
+            f"o_SPI{n}_SCLK_T"      : spi_phy.ps_sclk_t,
+
+            f"i_SPI{n}_SCLK_I"      : spi_phy.ps_sclk_i,
+            f"i_SPI{n}_MOSI_I"      : spi_phy.ps_mosi_i,
+            f"i_SPI{n}_MISO_I"      : spi_phy.ps_miso_i,
+            f"i_SPI{n}_SS_I"        : spi_phy.ps_ss_i,
+            f"o_SPI{n}_SS_O"        : spi_phy.ps_ss[0],
+            f"o_SPI{n}_SS1_O"       : spi_phy.ps_ss[1],
+            f"o_SPI{n}_SS2_O"       : spi_phy.ps_ss[2],
+            f"o_SPI{n}_SS_T"        : spi_phy.ps_ss_t,
+        })
+    
+    def add_interconnect_slave(self, slave):
+        self.interconnect_slaves.append(slave)
+
+    def get_csr_dev_address(self, name, memory):     
+        # TODO: switch to MiSoC-like address retriving from 
+        # the list of CSR devices  
+        if memory is not None:
+            name = name + "_" + memory.name_override
+        try:
+            return self.csr_map[name]
+        except KeyError:
+            return None
+        
+    def soc_finalize(self):
+        # Overload this method to customize SystemInterconnect
+        # and csrbanks - especially useful in Linien
+        self.add_interconnect_slave(self.syscdc.source)
+        self.submodules.interconnect = SysInterconnect(
+            self.axi2sys.sys,
+            *self.interconnect_slaves
+        )
+        self.submodules.csrbanks = csr_bus.CSRBankArray(self,
+            self.get_csr_dev_address)
+        self.submodules.csrcon = csr_bus.Interconnect(
+            self.sys2csr.csr, self.csrbanks.get_buses()
+        )
+        
+    def do_finalize(self):
+        self.soc_finalize()
+        PS7.do_finalize(self)
+
+    def build(self, *args, **kwargs):
+        self.platform.build(self, *args, **kwargs)
+
+class LED(Module, AutoCSR):
+    def __init__(self, led):
+        
+        self.led_out = CSRStorage(1)
+
+        self.comb += led.eq(self.led_out.storage)
+
+
+if __name__ == "__main__":
+    import subprocess
+    from fast_servo.gateware.fast_servo_platform import Platform
+    import argparse
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--debug", action="store_true", default=False, help="Hardwire ADC data to DAC")
+    args = parser.parse_args()
+
+    
+    root_path = os.getcwd()
+    platform = Platform()
+    fast_servo = BaseSoC(platform, passthrouh=args.debug)
+
+    build_dir = "builds/fast_servo_gw_debug" if args.debug else"builds/fast_servo_gw"
+    build_name = "top"
+    fast_servo.build(build_dir=build_dir, build_name=build_name, run=True)
+    os.chdir(os.path.join(root_path, build_dir))
+    with open(f"{build_name}.bif", "w") as f:
+        f.write(f"all:\n{{\n\t{build_name}.bit\n}}")
+    
+    cmd = f"bootgen -image {build_name}.bif -arch zynq -process_bitstream bin -w on".split(" ")
+    subprocess.run(cmd)
+
+    
+

fast-servo/linien-gateware/verilog/LTC2195.v

@@ -0,0 +1,162 @@
+///////////////////////////////////////////////////////////////////////////////
+// LTC2195.v
+//
+// 8/03/21
+// Jakub Matyas
+//
+//	LTC2195 controller.
+//
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+// `include "timescale.v"
+`timescale 1ns/1ps // this was in the SelectIO design
+
+module LTC2195(
+	input	 						   rst_in,
+	input clk200,
+	input  DCO,
+	input  DCO_2D,
+	input  		 					FR_in_p,
+	input  							FR_in_n,
+	input  		 			[3:0]	D0_in_p,
+	input  		 			[3:0]	D0_in_n,
+	input  		 			[3:0]	D1_in_p,
+	input  		 			[3:0]	D1_in_n,
+	input  bitslip,
+	input [4:0] delay_val,
+	
+	output reg	  [15:0] ADC0_out,
+	output reg    [15:0] ADC1_out,
+	output reg					[3:0] FR_out,
+	output wire [8:0] o_data_from_pins,
+	output idelay_rdy
+);
+
+// ///////////////////////////////////////////////////////////////////////////////
+// // LVDS inputs
+
+localparam N_BITS = 4;
+localparam  N_LANES = 9;	// for each channel 4 lanes + 1 lane for FRAME
+wire [N_LANES-1:0] data_in_p, data_in_n, data_in_from_pins, data_in_from_pins_delay;
+assign data_in_p = {FR_in_p, D1_in_p, D0_in_p};
+assign data_in_n = {FR_in_n, D1_in_n, D0_in_n};
+assign o_data_from_pins = data_in_from_pins_delay;
+
+
+wire [N_LANES*4 -1:0] data_out;
+wire [35:0 ]data_out_mod;
+
+
+assign data_out_mod = {~data_out[35:24], data_out[23:20], ~data_out[19:16], data_out[15:0]};
+
+
+always @(posedge DCO_2D) begin
+    ADC0_out <= {
+		data_out_mod[0], data_out_mod[4], data_out_mod[1], data_out_mod[5],
+        data_out_mod[2], data_out_mod[6], data_out_mod[3], data_out_mod[7],
+        data_out_mod[8], data_out_mod[12], data_out_mod[9], data_out_mod[13],
+        data_out_mod[10], data_out_mod[14], data_out_mod[11], data_out_mod[15]
+    };
+
+    ADC1_out <= {
+		data_out_mod[16 + 0], data_out_mod[16 + 4], data_out_mod[16 + 1], data_out_mod[16 + 5],
+        data_out_mod[16 + 2], data_out_mod[16 + 6], data_out_mod[16 + 3], data_out_mod[16 + 7],
+        data_out_mod[16 + 8], data_out_mod[16 + 12], data_out_mod[16 + 9], data_out_mod[16 + 13],
+        data_out_mod[16 + 10], data_out_mod[16 + 14], data_out_mod[16 + 11], data_out_mod[16 + 15]
+    };
+	FR_out <= {data_out_mod[32], data_out_mod[33], data_out_mod[34], data_out_mod[35]};		// value that arrived first is LSB, therefore reversing order
+end
+
+wire s_idelay_rdy;
+IDELAYCTRL IDELAYCTRL_inst (
+	.RDY(s_idelay_rdy),       // 1-bit output: Ready output
+	.REFCLK(clk200), // 1-bit input: Reference clock input
+	.RST(s_rst)        // 1-bit input: Active high reset input
+);
+
+assign idelay_rdy = s_idelay_rdy;
+
+
+reg s_rst;
+reg [5:0] rst_cnt;
+wire serdes_o;
+
+always @(posedge DCO_2D) begin
+    if (rst_in) begin
+        s_rst <= 1'b1;
+        rst_cnt <= 'b0;
+    end else begin
+        if (rst_cnt == 22) 
+            s_rst <= 'b0;
+        else
+            rst_cnt <= rst_cnt + 1;
+    end
+end
+
+genvar lane;
+generate for (lane=0; lane<N_LANES; lane=lane+1) begin
+	IBUFDS #(
+		.DIFF_TERM("TRUE")
+	)
+	ibufds_inst (
+		.I(data_in_p[lane]),
+		.IB(data_in_n[lane]),
+		.O(data_in_from_pins[lane])
+	);
+    IDELAYE2 #(
+        .CINVCTRL_SEL("FALSE"),          // Enable dynamic clock inversion (FALSE, TRUE)
+        .DELAY_SRC("IDATAIN"),           // Delay input (IDATAIN, DATAIN)
+        .HIGH_PERFORMANCE_MODE("TRUE"), // Reduced jitter ("TRUE"), Reduced power ("FALSE")
+        .IDELAY_TYPE("VAR_LOAD"),           // FIXED, VARIABLE, VAR_LOAD, VAR_LOAD_PIPE
+        .IDELAY_VALUE(0),                // Input delay tap setting (0-31)
+        .PIPE_SEL("FALSE"),              // Select pipelined mode, FALSE, TRUE
+        .REFCLK_FREQUENCY(200.0),        // IDELAYCTRL clock input frequency in MHz (190.0-210.0, 290.0-310.0).
+        .SIGNAL_PATTERN("DATA")          // DATA, CLOCK input signal
+    )
+	IDELAYE2_inst (
+	   .C(clk200),
+	   .CE('b0),
+	   .CNTVALUEIN(delay_val),
+	   .LD(1'b1),
+		.DATAOUT(data_in_from_pins_delay[lane]),         // 1-bit output: Delayed data output
+		.IDATAIN(data_in_from_pins[lane]),         // 1-bit input: Data input from the I/O
+		.LDPIPEEN		(1'b0),
+	   .REGRST			(1'b0),
+	   .CINVCTRL		(1'b0)
+	);
+
+	ISERDESE2 #(
+		.DATA_RATE("DDR"),
+		.DATA_WIDTH(3'd4),
+		.INTERFACE_TYPE("NETWORKING"),
+		.IOBDELAY("BOTH"),
+		.SERDES_MODE("MASTER"),
+		.NUM_CE(2'd2)
+	)
+	iserdes_inst (
+		.CE1(1'd1),
+		.CE2(1'd1),
+		.DYNCLKDIVSEL('b0),
+		.DYNCLKSEL('b0),
+		.CLK(DCO),
+		.CLKB(!DCO),
+		.CLKDIV(DCO_2D),
+//		.D(data_in_from_pins[lane]),
+		.DDLY(data_in_from_pins_delay[lane]),
+		.RST(s_rst),
+		.BITSLIP(bitslip),
+		// DATA is MSB first and OUTA is LANE0, so in case of OUTA:
+		// Q1 = D9
+		// Q2 = D11
+		// Q3 = D13
+		// Q4 = D15
+		.Q1(data_out[lane*N_BITS + 3]),       
+		.Q2(data_out[lane*N_BITS + 2]),
+		.Q3(data_out[lane*N_BITS + 1]),
+		.Q4(data_out[lane*N_BITS + 0]) 
+	);
+end
+endgenerate
+
+endmodule

fast-servo/linien-gateware/verilog/axi_slave.v

@@ -0,0 +1,265 @@
+/**
+ * $Id: axi_slave.v 961 2014-01-21 11:40:39Z matej.oblak $
+ *
+ * @brief Red Pitaya symplified AXI slave.
+ *
+ * @Author Matej Oblak
+ *
+ * (c) Red Pitaya  http://www.redpitaya.com
+ *
+ * This part of code is written in Verilog hardware description language (HDL).
+ * Please visit http://en.wikipedia.org/wiki/Verilog
+ * for more details on the language used herein.
+ */
+
+
+
+/**
+ * GENERAL DESCRIPTION:
+ *
+ * AXI slave used also for simple bus master.
+ *
+ *
+ *                     /------\
+ *   WR ADDRESS  ----> |  WR  |
+ *   WR DATA     ----> |      | -----------
+ *   WR RESPONSE <---- |  CH  |            |
+ *                     \------/       /--------\
+ *                                    | SIMPLE | ---> WR/RD ADDRRESS
+ *   AXI                              |        | ---> WR DATA
+ *                                    |   RP   | <--- RD DATA
+ *                                    |  BUS   | <--- ACKNOWLEDGE
+ *                     /------\       \--------/
+ *   RD ADDRESS  ----> |  RD  |            |
+ *   RD DATA     <---- |  CH  | -----------
+ *                     \------/
+ *
+ *
+ * Because AXI bus is quite complex simplier bus was created.
+ *
+ * It combines write and read channel, where write has bigger priority. Command
+ * is then send forward to red pitaya bus. When wite or read acknowledge is
+ * received AXI response is created and new AXI is accepted.
+ *
+ * To prevent AXI lockups because no response is received, this slave creates its
+ * own after 32 cycles (ack_cnt).
+ *
+ */
+
+
+
+
+module axi_slave
+#(
+parameter           AXI_DW         =  64           , // data width (8,16,...,1024)
+parameter           AXI_AW         =  32           , // address width
+parameter           AXI_IW         =   8           , // ID width
+parameter           AXI_SW         = AXI_DW >> 3     // strobe width - 1 bit for every data byte
+)
+(
+ // global signals
+   input                     axi_clk_i      ,  //!< AXI global clock
+   input                     axi_rstn_i     ,  //!< AXI global reset
+
+ // axi write address channel
+   input      [ AXI_IW-1: 0] axi_awid_i     ,  //!< AXI write address ID
+   input      [ AXI_AW-1: 0] axi_awaddr_i   ,  //!< AXI write address
+   input      [      4-1: 0] axi_awlen_i    ,  //!< AXI write burst length
+   input      [      3-1: 0] axi_awsize_i   ,  //!< AXI write burst size
+   input      [      2-1: 0] axi_awburst_i  ,  //!< AXI write burst type
+   input      [      2-1: 0] axi_awlock_i   ,  //!< AXI write lock type
+   input      [      4-1: 0] axi_awcache_i  ,  //!< AXI write cache type
+   input      [      3-1: 0] axi_awprot_i   ,  //!< AXI write protection type
+   input                     axi_awvalid_i  ,  //!< AXI write address valid
+   output                    axi_awready_o  ,  //!< AXI write ready
+
+ // axi write data channel
+   input      [ AXI_IW-1: 0] axi_wid_i      ,  //!< AXI write data ID
+   input      [ AXI_DW-1: 0] axi_wdata_i    ,  //!< AXI write data
+   input      [ AXI_SW-1: 0] axi_wstrb_i    ,  //!< AXI write strobes
+   input                     axi_wlast_i    ,  //!< AXI write last
+   input                     axi_wvalid_i   ,  //!< AXI write valid
+   output                    axi_wready_o   ,  //!< AXI write ready
+
+ // axi write response channel
+   output     [ AXI_IW-1: 0] axi_bid_o      ,  //!< AXI write response ID
+   output reg [      2-1: 0] axi_bresp_o    ,  //!< AXI write response
+   output reg                axi_bvalid_o   ,  //!< AXI write response valid
+   input                     axi_bready_i   ,  //!< AXI write response ready
+
+ // axi read address channel
+   input      [ AXI_IW-1: 0] axi_arid_i     ,  //!< AXI read address ID
+   input      [ AXI_AW-1: 0] axi_araddr_i   ,  //!< AXI read address
+   input      [      4-1: 0] axi_arlen_i    ,  //!< AXI read burst length
+   input      [      3-1: 0] axi_arsize_i   ,  //!< AXI read burst size
+   input      [      2-1: 0] axi_arburst_i  ,  //!< AXI read burst type
+   input      [      2-1: 0] axi_arlock_i   ,  //!< AXI read lock type
+   input      [      4-1: 0] axi_arcache_i  ,  //!< AXI read cache type
+   input      [      3-1: 0] axi_arprot_i   ,  //!< AXI read protection type
+   input                     axi_arvalid_i  ,  //!< AXI read address valid
+   output                    axi_arready_o  ,  //!< AXI read address ready
+
+ // axi read data channel
+   output     [ AXI_IW-1: 0] axi_rid_o      ,  //!< AXI read response ID
+   output reg [ AXI_DW-1: 0] axi_rdata_o    ,  //!< AXI read data
+   output reg [      2-1: 0] axi_rresp_o    ,  //!< AXI read response
+   output reg                axi_rlast_o    ,  //!< AXI read last
+   output reg                axi_rvalid_o   ,  //!< AXI read response valid
+   input                     axi_rready_i   ,  //!< AXI read response ready
+
+ // RP system read/write channel
+   output     [ AXI_AW-1: 0] sys_addr_o     ,  //!< system bus read/write address.
+   output     [ AXI_DW-1: 0] sys_wdata_o    ,  //!< system bus write data.
+   output reg [ AXI_SW-1: 0] sys_sel_o      ,  //!< system bus write byte select.
+   output reg                sys_wen_o      ,  //!< system bus write enable.
+   output reg                sys_ren_o      ,  //!< system bus read enable.
+   input      [ AXI_DW-1: 0] sys_rdata_i    ,  //!< system bus read data.
+   input                     sys_err_i      ,  //!< system bus error indicator.
+   input                     sys_ack_i         //!< system bus acknowledge signal.
+);
+
+
+//---------------------------------------------------------------------------------
+//
+//  AXI slave Module
+wire                 ack         ;
+reg   [      6-1: 0] ack_cnt     ;
+
+reg                  rd_do       ;
+reg   [ AXI_IW-1: 0] rd_arid     ;
+reg   [ AXI_AW-1: 0] rd_araddr   ;
+reg                  rd_error    ;
+wire                 rd_errorw   ;
+
+reg                  wr_do       ;
+reg   [ AXI_IW-1: 0] wr_awid     ;
+reg   [ AXI_AW-1: 0] wr_awaddr   ;
+reg   [ AXI_IW-1: 0] wr_wid      ;
+reg   [ AXI_DW-1: 0] wr_wdata    ;
+reg                  wr_error    ;
+wire                 wr_errorw   ;
+
+assign wr_errorw = (axi_awlen_i != 4'h0) || (axi_awsize_i != 3'b010); // error if write burst and more/less than 4B transfer
+assign rd_errorw = (axi_arlen_i != 4'h0) || (axi_arsize_i != 3'b010); // error if read burst and more/less than 4B transfer
+
+always @(posedge axi_clk_i) begin
+   if (axi_rstn_i == 1'b0) begin
+      rd_do    <= 1'b0 ;
+      rd_error <= 1'b0 ;
+   end
+   else begin
+      if (axi_arvalid_i && !rd_do && !axi_awvalid_i && !wr_do) // accept just one read request - write has priority
+         rd_do  <= 1'b1 ;
+      else if (axi_rready_i && rd_do && ack)
+         rd_do  <= 1'b0 ;
+
+      if (axi_arvalid_i && axi_arready_o) begin // latch ID and address
+         rd_arid   <= axi_arid_i   ;
+         rd_araddr <= axi_araddr_i ;
+         rd_error  <= rd_errorw    ;
+      end
+   end
+end
+
+
+always @(posedge axi_clk_i) begin
+   if (axi_rstn_i == 1'b0) begin
+      wr_do    <= 1'b0 ;
+      wr_error <= 1'b0 ;
+   end
+   else begin
+      if (axi_awvalid_i && !wr_do && !rd_do) // accept just one write request - if idle
+         wr_do  <= 1'b1 ;
+      else if (axi_bready_i && wr_do && ack)
+         wr_do  <= 1'b0 ;
+
+      if (axi_awvalid_i && axi_awready_o) begin // latch ID and address
+         wr_awid   <= axi_awid_i   ;
+         wr_awaddr <= axi_awaddr_i ;
+         wr_error  <= wr_errorw    ;
+      end
+
+      if (axi_wvalid_i && wr_do) begin // latch ID and write data
+         wr_wid    <= axi_wid_i    ;
+         wr_wdata  <= axi_wdata_i  ;
+      end
+   end
+end
+
+
+
+
+
+assign axi_awready_o = !wr_do && !rd_do                      ;
+assign axi_wready_o  = (wr_do && axi_wvalid_i) || (wr_errorw && axi_wvalid_i)    ;
+assign axi_bid_o     = wr_awid                               ;
+//assign axi_bresp_o   = {wr_error,1'b0}                       ;  // 2'b10 SLVERR
+//assign axi_bvalid_o  = (sys_wen_o && axi_bready_i) || (wr_error && axi_bready_i)      ;
+
+assign axi_arready_o = !rd_do && !wr_do && !axi_awvalid_i     ;
+assign axi_rid_o     = rd_arid                                ;
+//assign axi_rdata_o   = sys_rdata_i                            ;
+
+always @(posedge axi_clk_i) begin
+   if (axi_rstn_i == 1'b0) begin
+      axi_bvalid_o  <= 1'b0 ;
+      axi_bresp_o   <= 2'h0 ;
+      axi_rlast_o   <= 1'b0 ;
+      axi_rvalid_o  <= 1'b0 ;
+      axi_rresp_o   <= 2'h0 ;
+   end
+   else begin
+      axi_bvalid_o  <= wr_do && ack  ;
+      axi_bresp_o   <= {(wr_error || ack_cnt[5]),1'b0} ;  // 2'b10 SLVERR    2'b00 OK
+      axi_rlast_o   <= rd_do && ack  ;
+      axi_rvalid_o  <= rd_do && ack  ;
+      axi_rresp_o   <= {(rd_error || ack_cnt[5]),1'b0} ;  // 2'b10 SLVERR    2'b00 OK
+      axi_rdata_o   <= sys_rdata_i   ;
+   end
+end
+
+// acknowledge protection
+always @(posedge axi_clk_i) begin
+   if (axi_rstn_i == 1'b0) begin
+      ack_cnt   <= 6'h0 ;
+   end
+   else begin
+      if ((axi_arvalid_i && axi_arready_o) || (axi_awvalid_i && axi_awready_o))  // rd || wr request
+         ack_cnt <= 6'h1 ;
+      else if (ack)
+         ack_cnt <= 6'h0 ;
+      else if (|ack_cnt)
+         ack_cnt <= ack_cnt + 6'h1 ;
+   end
+end
+
+assign ack = sys_ack_i || ack_cnt[5] || (rd_do && rd_errorw) || (wr_do && wr_errorw); // bus acknowledge or timeout or error
+
+
+
+
+
+//------------------------------------------
+//  Simple slave interface
+
+always @(posedge axi_clk_i) begin
+   if (axi_rstn_i == 1'b0) begin
+      sys_wen_o  <= 1'b0 ;
+      sys_ren_o  <= 1'b0 ;
+      sys_sel_o  <= {AXI_SW{1'b0}} ;
+   end
+   else begin
+      sys_wen_o  <= wr_do && axi_wvalid_i && !wr_errorw ;
+      sys_ren_o  <= axi_arvalid_i && axi_arready_o && !rd_errorw ;
+      sys_sel_o  <= {AXI_SW{1'b1}} ;
+   end
+end
+
+assign sys_addr_o  = rd_do ? rd_araddr : wr_awaddr  ;
+assign sys_wdata_o = wr_wdata                       ;
+
+
+
+
+
+endmodule

fast-servo/linien-gateware/verilog/bus_clk_bridge.v

@@ -0,0 +1,128 @@
+/**
+ * $Id: bus_clk_bridge.v 961 2014-01-21 11:40:39Z matej.oblak $
+ *
+ * @brief Red Pitaya system bus clock crossing bridge.
+ *
+ * @Author Matej Oblak
+ *
+ * (c) Red Pitaya  http://www.redpitaya.com
+ *
+ * This part of code is written in Verilog hardware description language (HDL).
+ * Please visit http://en.wikipedia.org/wiki/Verilog
+ * for more details on the language used herein.
+ */
+
+
+
+/**
+ * GENERAL DESCRIPTION:
+ *
+ * Clock domain bridge for system bus.
+ *
+ *
+ *                  /------\
+ *   SYSTEM         |      |         PROCESSING
+ *   BUS    <-----> | SYNC | <----->    BUS
+ *                  |      |
+ *                  \------/
+ *
+ *
+ * System bus runs on one clock domain while processing runs on separate. To 
+ * simplify transition of writing and reading data this bridge was created.
+ * 
+ */
+
+
+
+
+module bus_clk_bridge
+(
+   // system bus
+   input                 sys_clk_i     ,  //!< bus clock
+   input                 sys_rstn_i    ,  //!< bus reset - active low
+   input      [ 32-1: 0] sys_addr_i    ,  //!< bus address
+   input      [ 32-1: 0] sys_wdata_i   ,  //!< bus write data
+   input      [  4-1: 0] sys_sel_i     ,  //!< bus write byte select
+   input                 sys_wen_i     ,  //!< bus write enable
+   input                 sys_ren_i     ,  //!< bus read enable
+   output     [ 32-1: 0] sys_rdata_o   ,  //!< bus read data
+   output                sys_err_o     ,  //!< bus error indicator
+   output                sys_ack_o     ,  //!< bus acknowledge signal
+
+
+   // Destination bus
+   input                 clk_i         ,  //!< clock
+   input                 rstn_i        ,  //!< reset - active low
+   output reg [ 32-1: 0] addr_o        ,  //!< address
+   output reg [ 32-1: 0] wdata_o       ,  //!< write data
+   output                wen_o         ,  //!< write enable
+   output                ren_o         ,  //!< read enable
+   input      [ 32-1: 0] rdata_i       ,  //!< read data
+   input                 err_i         ,  //!< error indicator
+   input                 ack_i            //!< acknowledge signal
+);
+
+
+
+//---------------------------------------------------------------------------------
+//  Synchronize signals between clock domains
+
+reg            sys_rd    ;
+reg            sys_wr    ;
+reg            sys_do    ;
+reg  [ 2-1: 0] sys_sync  ;
+reg            sys_done  ;
+reg            dst_do    ;
+reg  [ 2-1: 0] dst_sync  ;
+reg            dst_done  ;
+
+always @(posedge sys_clk_i) begin
+   if (sys_rstn_i == 1'b0) begin
+      sys_rd   <= 1'b0 ;
+      sys_wr   <= 1'b0 ;
+      sys_do   <= 1'b0 ;
+      sys_sync <= 2'h0 ;
+      sys_done <= 1'b0 ;
+   end 
+   else begin
+
+      if ((sys_do == sys_done) && (sys_wen_i || sys_ren_i)) begin
+         addr_o  <= sys_addr_i    ;
+         wdata_o <= sys_wdata_i   ;
+         sys_rd  <= sys_ren_i     ;
+         sys_wr  <= sys_wen_i     ;
+         sys_do  <= !sys_do       ;
+      end
+
+      sys_sync <= {sys_sync[0], dst_done};
+      sys_done <= sys_sync[1];
+   end
+end
+
+
+always @(posedge clk_i) begin
+   if (rstn_i == 1'b0) begin
+      dst_do    <= 1'b0 ;
+      dst_sync  <= 2'h0 ;
+      dst_done  <= 1'b0 ;
+   end
+   else begin
+      dst_sync <= {dst_sync[0], sys_do};
+      dst_do   <= dst_sync[1];
+
+      if (ack_i && (dst_do != dst_done))
+         dst_done <= dst_do;
+   end
+end
+
+assign ren_o = sys_rd && (dst_sync[1]^dst_do);
+assign wen_o = sys_wr && (dst_sync[1]^dst_do);
+
+
+assign sys_rdata_o = rdata_i                ;
+assign sys_err_o   = err_i                  ;
+assign sys_ack_o   = sys_done ^ sys_sync[1] ;
+
+
+
+endmodule

fast-servo/linien-gateware/verilog/spi2threewire.v

@@ -0,0 +1,111 @@
+`timescale 1ns / 1ps
+//////////////////////////////////////////////////////////////////////////////////
+// Company:  WUT
+// Engineer: Jakub Matyas
+// 
+// Create Date: 03/02/2023 01:39:08 PM
+// Design Name: 
+// Module Name: spi2threewire
+// Project Name: 
+// Target Devices: 
+// Tool Versions: 
+// Description: 
+// 
+// Dependencies: 
+// 
+// Revision:
+// Revision 0.01 - File Created
+// Additional Comments:
+// 
+//////////////////////////////////////////////////////////////////////////////////
+
+module spi2threewire (
+    output ps_sclk_i,
+    input ps_sclk_o,
+    input ps_sclk_t,
+    
+    output ps_mosi_i,
+    input ps_mosi_o,
+    input ps_mosi_t,
+    
+    output ps_miso_i,
+    input ps_miso_o,
+    input ps_miso_t,
+    
+    output ps_ss_i,
+    input [2:0] ps_ss,
+    input ps_ss_t,
+    
+    output o_ss,
+    output o_sclk,
+    inout sdio
+
+);
+
+assign ps_sclk_i = 1'b0;
+assign ps_mosi_i = 1'b0;
+assign ps_ss_i = 1'b1;
+
+
+reg [3:0]   bit_count = 'd0;
+
+// rd_wr_n - whether it will be READ transaction or WRITE
+//           first bit of the command
+reg         rd_wr_n = 'd0;          
+reg         sdio_buffer_direction = 'd0;
+
+wire        s_sclk;
+wire        s_csn;
+wire        s_sdio_buffer_direction;
+
+assign s_sclk = ps_sclk_o;
+assign s_csn = ps_ss[0];
+assign o_ss = s_csn;
+
+// 1 if there is a SPI tranmsission going on (CS_N is LOW)
+//      AND transmission is of READ type
+// 0 otherwise
+assign s_sdio_buffer_direction = sdio_buffer_direction & ~s_csn;
+
+always @(posedge s_sclk or posedge s_csn) begin
+    if (s_csn == 1'b1) begin
+        // after the transmission, fill bit counter with ZEROS
+        // and zero transmission type (rd_wr_n)
+        bit_count <= 4'd0;
+        rd_wr_n <= 1'b0;
+    end else begin 
+        // on every rising edge increment bit counter
+        // sample first bit to get the knowledge of the transmission type
+        bit_count <= (bit_count < 4'd15) ? bit_count + 1'b1 : bit_count;
+        if (bit_count == 4'b0) 
+            rd_wr_n <= ps_mosi_o;
+    end
+end
+
+always @(negedge s_sclk or posedge s_csn) begin
+    if (s_csn == 1'b1)
+        sdio_buffer_direction <= 1'b0;
+    else begin
+        if (bit_count == 4'd8)
+            // after the 8th bit, on falling edge,
+            // set the SDIO buffer direction 
+            // accordingly to the transmission type
+            sdio_buffer_direction <= rd_wr_n;
+    end
+end
+
+
+IOBUF IOBUF_inst (
+    .O(ps_miso_i),
+    .IO(sdio),
+    .I(ps_mosi_o),
+    .T(s_sdio_buffer_direction)      // 3-state enable input, high=input (from ext), low=output
+);
+
+OBUFT sclk_buf (
+    .O(o_sclk),
+    .I(ps_sclk_o),
+    .T('b0)
+);
+
+endmodule

flake.lock

@@ -18,11 +18,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1703961334,
-        "narHash": "sha256-M1mV/Cq+pgjk0rt6VxoyyD+O8cOUiai8t9Q6Yyq4noY=",
+        "lastModified": 1706107048,
+        "narHash": "sha256-SqcJ9KxQVY+eLojoqYuJhWa4+D9utUzEuFJzOcUS8iY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b0d36bd0a420ecee3bc916c91886caca87c894e9",
+        "rev": "6fd7935607b68a96949b51ff08f12109e99ffd1f",
         "type": "github"
       },
       "original": {
@@ -56,7 +56,43 @@
     "root": {
       "inputs": {
         "nixpkgs": "nixpkgs",
-        "not-os": "not-os"
+        "not-os": "not-os",
+        "src-migen": "src-migen",
+        "src-misoc": "src-misoc"
+      }
+    },
+    "src-migen": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1702942348,
+        "narHash": "sha256-gKIfHZxsv+jcgDFRW9mPqmwqbZXuRvXefkZcSFjOGHw=",
+        "owner": "m-labs",
+        "repo": "migen",
+        "rev": "50934ad10a87ade47219b796535978b9bdf24023",
+        "type": "github"
+      },
+      "original": {
+        "owner": "m-labs",
+        "repo": "migen",
+        "type": "github"
+      }
+    },
+    "src-misoc": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1699352904,
+        "narHash": "sha256-SglyTmXOPv8jJOjwAjJrj/WhAkItQfUbvKfUqrynwRg=",
+        "ref": "refs/heads/master",
+        "rev": "a53859f2167c31ab5225b6c09f30cf05527b94f4",
+        "revCount": 2452,
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/m-labs/misoc.git"
+      },
+      "original": {
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/m-labs/misoc.git"
       }
     }
   },

flake.nix

@@ -5,7 +5,10 @@
   inputs.not-os.url = github:cleverca22/not-os;
   inputs.not-os.inputs.nixpkgs.follows = "nixpkgs";
 
-  outputs = { self, nixpkgs, not-os }:
+  inputs.src-migen = { url = github:m-labs/migen; flake = false; };
+  inputs.src-misoc = { type = "git"; url = "https://github.com/m-labs/misoc.git"; submodules = true; flake = false; };
+
+  outputs = { self, nixpkgs, not-os, src-migen, src-misoc }:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; };
       not-os-cfg = not-os-configured.config.system;
@@ -19,6 +22,86 @@
           ./pr-28.patch
           ./pr-29.patch
           ./pr-30.patch
+          ./pr-31.patch
+        ];
+      };
+
+      migen = pkgs.python3Packages.buildPythonPackage rec {
+        name = "migen";
+        src = src-migen;
+        format = "pyproject";
+        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
+        propagatedBuildInputs = [ pkgs.python3Packages.colorama ];
+      };
+
+      misoc = pkgs.python3Packages.buildPythonPackage {
+        name = "misoc";
+        src = src-misoc;
+        propagatedBuildInputs = with pkgs.python3Packages; [ jinja2 numpy migen pyserial asyncserial ];
+      };
+
+      vivado = pkgs.buildFHSEnv {
+        name = "vivado";
+        targetPkgs = pkgs: with pkgs; let
+        # Apply patch from https://github.com/nix-community/nix-environments/pull/54
+        # to fix ncurses libtinfo.so's soname issue
+        ncurses' = ncurses5.overrideAttrs (old: {
+          configureFlags = old.configureFlags ++ [ "--with-termlib" ];
+          postFixup = "";
+        });
+        in [
+          libxcrypt-legacy
+          (ncurses'.override { unicodeSupport = false; })
+          zlib
+          libuuid
+          xorg.libSM
+          xorg.libICE
+          xorg.libXrender
+          xorg.libX11
+          xorg.libXext
+          xorg.libXtst
+          xorg.libXi
+          freetype
+          fontconfig
+        ];
+        profile = "set -e; source /opt/Xilinx/Vivado/2022.2/settings64.sh";
+        runScript = "vivado";
+      };
+
+      pyrp3 = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "pyrp3";
+        version = "1.2.0";
+        pyproject = true;
+        src = pkgs.fetchFromGitHub {
+          owner = "linien-org";
+          repo = "${pname}";
+          rev = "v${version}";
+          hash = "sha256-43TTlpJ5SMAjQM71bNVvrWQyciRXM3zpuA/Dw41AEgU=";
+        };
+        nativeBuildInputs = with pkgs.python3Packages; [ setuptools wheel setuptools-scm ];
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          myhdl
+          rpyc4
+          cached-property
+          numpy
+        ];
+      };
+
+      linien-server = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "linien-server";
+        pyproject = true;
+        inherit (pkgs.python3Packages.linien-common) src version;
+        sourceRoot = "source/linien-server";
+        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          appdirs
+          certifi
+          click
+          cma
+          pylpsd
+          pyrp3
+          requests
+          linien-common
         ];
       };
 
@@ -26,6 +109,9 @@
         inherit nixpkgs;
         extraModules = [
           "${patched-not-os}/zynq_image.nix"
+          ({ config, pkgs, ... }: {
+            environment.systemPackages = [ linien-server ];
+          })
         ];
         system = "x86_64-linux";
         crossSystem.system = "armv7l-linux";
@@ -145,6 +231,43 @@
         };
       };
 
+      fast-servo-gateware = pkgs.stdenv.mkDerivation rec {
+        name = "fast-servo-gateware";
+        inherit (pkgs.python3Packages.linien-common) src;
+        prePatch = ''
+          mkdir -p fast_servo/gateware
+          cp -r ${./fast-servo/linien-gateware}/. fast_servo/gateware
+        '';
+        patches = [
+          fast-servo/linien-fast-servo-gateware.patch
+          fast-servo/linien-fast-servo-server.patch
+        ];
+        nativeBuildInputs = [
+          (pkgs.python3.withPackages(ps: [
+            migen misoc
+            (ps.linien-common.overrideAttrs(oa: {
+              # config.py tries to access $HOME, but we do not need it for building gateware
+              postPatch = ''
+                echo > linien_common/config.py
+                echo > linien_common/__init__.py
+              '';
+              doCheck = false;
+              }))
+            ]))
+          vivado
+        ];
+        buildPhase = ''
+          python -m gateware.fpga_image_helper -p fastservo
+        '';
+        installPhase = ''
+          mkdir -p $out $out/nix-support
+          cp gateware/build/top.bit $out
+          cp linien-server/linien_server/gateware.bin $out
+          echo file binary-dist $out/top.bit >> $out/nix-support/hydra-build-products
+          echo file binary-dist $out/gateware.bin >> $out/nix-support/hydra-build-products
+        '';
+      };
+
       mkbootimage = pkgs.stdenv.mkDerivation {
         pname = "mkbootimage";
         version = "2.3dev";
@@ -175,6 +298,8 @@
           url = "https://download.qemu.org/qemu-${version}.tar.xz";
           hash = "sha256-Q8wXaAQQVYb3T5A5jzTp+FeH3/QA07ZA2B93efviZbs=";
         };
+        # temporary fix to build qemu with recent nixpkgs
+        patches = builtins.filter (x: (x.name or "") != "9d5b42beb6978dc6219d5dc029c9d453c6b8d503.diff") oldAttrs.patches;
       });
 
       board-package-set = { board }: let
@@ -344,7 +469,7 @@
             export PATH=${qemu}/bin:$PATH
             IMGDIR=$(mktemp -d /tmp/not-os-qemu-XXXXXX)
             BASE=$(realpath $(dirname $0))
-            qemu-img create -F raw -f qcow2 -b $BASE/sd-image.img $IMGDIR/sd-overlay.qcow2 512M
+            qemu-img create -F raw -f qcow2 -b $BASE/sd-image.img $IMGDIR/sd-overlay.qcow2 2G
 
             # Some command arguments are based from samples in Xilinx QEMU User Documentation
             # See: https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/821854273/Running+Bare+Metal+Applications+on+QEMU
@@ -384,10 +509,13 @@
     in rec {
       packages.x86_64-linux = {
         inherit mkbootimage;
+        inherit migen misoc vivado;
       };
-      packages.armv7l-linux =
-        (board-package-set { board = "zc706"; }) //
-        (board-package-set { board = "fast-servo"; });
+      packages.armv7l-linux = {
+        inherit fast-servo-gateware linien-server;
+      } //
+      (board-package-set { board = "zc706"; }) //
+      (board-package-set { board = "fast-servo"; });
 
       hydraJobs = packages.x86_64-linux // packages.armv7l-linux;
     };

pr-31.patch

@@ -0,0 +1,28 @@
+diff --git a/runit.nix b/runit.nix
+index d7b0bf3..64f99f2 100644
+--- a/runit.nix
++++ b/runit.nix
+@@ -57,6 +57,23 @@ in
+       '';
+       "runit/3".source = pkgs.writeScript "3" ''
+         #!${pkgs.runtimeShell}
++        echo Waiting for services to stop...
++        sv force-stop /etc/service/*
++        sv exit /etc/service/*
++
++        echo Sending TERM signal to processes...
++        pkill --inverse -s0,1 -TERM
++        sleep 1
++        echo Sending KILL signal to processes...
++        pkill --inverse -s0,1 -KILL
++
++        echo Unmounting filesystems, disabling swap...
++        swapoff -a
++        umount -r -a -t nosysfs,noproc,nodevtmpfs,notmpfs
++        echo Remounting rootfs read-only...
++        mount -o remount,ro /
++
++        sync
+         echo and down we go
+       '';
+       "service/sshd/run".source = pkgs.writeScript "sshd_run" ''