#!/usr/bin/env python3

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Franck Jullien <franck.jullien@collshade.fr>
# SPDX-License-Identifier: BSD-2-Clause

import argparse

from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer

from litex_boards.platforms import efinix_titanium_ti60_f225_dev_kit

from litex.build.generic_platform import *

from litex.soc.cores.clock import *
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from litex.soc.integration.soc import SoCRegion

from litehyperbus.core.hyperbus import HyperRAM

# CRG ----------------------------------------------------------------------------------------------

class _CRG(Module):
    def __init__(self, platform, sys_clk_freq):
        self.clock_domains.cd_sys = ClockDomain()

        # # #

        clk25 = platform.request("clk25")
        rst_n = platform.request("user_btn", 0)

        # PLL
        self.submodules.pll = pll = TITANIUMPLL(platform)
        self.comb += pll.reset.eq(~rst_n)
        pll.register_clkin(clk25, 25e6)
        # You can use CLKOUT0 only for clocks with a maximum frequency of 4x
        # (integer) of the reference clock. If all your system clocks do not fall within
        # this range, you should dedicate one unused clock for CLKOUT0.
        pll.create_clkout(None, 25e6)

        pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=True)

# BaseSoC ------------------------------------------------------------------------------------------

class BaseSoC(SoCCore):
    def __init__(self, sys_clk_freq=int(200e6), with_spi_flash=False, with_hyperram=False, **kwargs):
        platform = efinix_titanium_ti60_f225_dev_kit.Platform()

        # SoCCore ----------------------------------------------------------------------------------
        SoCCore.__init__(self, platform, sys_clk_freq,
            ident         = "LiteX SoC on Efinix Titanium Ti60 F225 Dev Kit",
            ident_version = True,
            **kwargs
        )

        # CRG --------------------------------------------------------------------------------------
        self.submodules.crg = _CRG(platform, sys_clk_freq)

        # SPI Flash --------------------------------------------------------------------------------
        if with_spi_flash:
            from litespi.modules import W25Q64JW
            from litespi.opcodes import SpiNorFlashOpCodes as Codes
            self.add_spi_flash(mode="1x", module=W25Q64JW(Codes.READ_1_1_1), with_master=True)

        # HyperRAM ---------------------------------------------------------------------------------
        if with_hyperram:
            self.submodules.hyperram = HyperRAM(platform.request("hyperram"), latency=7)
            self.bus.add_slave("main_ram", slave=self.hyperram.bus, region=SoCRegion(origin=0x40000000, size=32*1024*1024))

# Build --------------------------------------------------------------------------------------------

def main():
    parser = argparse.ArgumentParser(description="LiteX SoC on Efinix Titanium Ti60 F225 Dev Kit")
    parser.add_argument("--build",          action="store_true", help="Build bitstream.")
    parser.add_argument("--load",           action="store_true", help="Load bitstream.")
    parser.add_argument("--flash",          action="store_true", help="Flash bitstream.")
    parser.add_argument("--sys-clk-freq",   default=200e6,       help="System clock frequency.")
    parser.add_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).")
    parser.add_argument("--with-hyperram",  action="store_true", help="Enable HyperRAM.")
    builder_args(parser)
    soc_core_args(parser)
    args = parser.parse_args()

    soc = BaseSoC(
        sys_clk_freq   = int(float(args.sys_clk_freq)),
        with_spi_flash = args.with_spi_flash,
        with_hyperram  = args.with_hyperram,
         **soc_core_argdict(args))
    builder = Builder(soc, **builder_argdict(args))
    builder.build(run=args.build)

    if args.load:
        prog = soc.platform.create_programmer()
        prog.load_bitstream(os.path.join(builder.gateware_dir, f"{soc.build_name}.bit"))

    if args.flash:
        from litex.build.openfpgaloader import OpenFPGALoader
        prog = OpenFPGALoader("titanium_ti60_f225")
        prog.flash(0, os.path.join(builder.gateware_dir, f"{soc.build_name}.hex"))

if __name__ == "__main__":
    main()