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foboot-bitstream: work-in-progress commit

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-02-25 16:19:17 +08:00
parent 8b54d5addb
commit 6771d28fb4
1 changed files with 47 additions and 5 deletions
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52
foboot-bitstream.py
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@ -21,6 +21,11 @@ from litex.soc.integration.builder import Builder
from litex.soc.integration.soc_core import csr_map_update
from litex.soc.interconnect import wishbone
from valentyusb import usbcore
from valentyusb.usbcore import io as usbio
from valentyusb.usbcore.cpu import epmem, unififo, epfifo
from valentyusb.usbcore.endpoint import EndpointType
from lxsocsupport import up5kspram, cas, spi_flash
import argparse
@ -31,6 +36,25 @@ _io = [
Subsignal("tx", Pins("13"), Misc("PULLUP")),
IOStandard("LVCMOS33")
),
("usb", 0,
Subsignal("d_p", Pins("34")),
Subsignal("d_n", Pins("37")),
Subsignal("pullup", Pins("35")),
IOStandard("LVCMOS33")
),
("spiflash", 0,
Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("17"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("14"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("18"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("19"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("14 17 19 18"), IOStandard("LVCMOS33")),
),
("clk48", 0, Pins("44"), IOStandard("LVCMOS33"))
]
@ -109,17 +133,25 @@ class RandomFirmwareROM(wishbone.SRAM):
wishbone.SRAM.__init__(self, size, read_only=True, init=data)
class Platform(LatticePlatform):
default_clk_name = "clk48"
default_clk_period = 20.833
gateware_size = 0x20000
def __init__(self, toolchain="icestorm"):
LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain="icestorm")
def create_programmer(self):
raise ValueError("programming is not supported")
def do_finalize(self, fragment):
LatticePlatform.do_finalize(self, fragment)
# def do_finalize(self, fragment):
# LatticePlatform.do_finalize(self, fragment)
class BaseSoC(SoCCore):
csr_peripherals = [
"cpu_or_bridge",
"usb",
"usb_obuf",
"usb_ibuf",
]
csr_map_update(SoCCore.csr_map, csr_peripherals)
@ -128,7 +160,10 @@ class BaseSoC(SoCCore):
}
mem_map.update(SoCCore.mem_map)
gateware_size = 0x20000
interrupt_map = {
"usb": 3,
}
interrupt_map.update(SoCCore.interrupt_map)
def __init__(self, platform, boot_source="random_rom", **kwargs):
# Disable integrated RAM as we'll add it later
@ -159,10 +194,10 @@ class BaseSoC(SoCCore):
self.add_memory_region("rom", kwargs['cpu_reset_address'], bios_size)
elif boot_source == "spi_rom":
bios_size = 0x8000
kwargs['cpu_reset_address']=self.mem_map["spiflash"]+self.gateware_size
kwargs['cpu_reset_address']=self.mem_map["spiflash"]+platform.gateware_size
self.add_memory_region("rom", kwargs['cpu_reset_address'], bios_size)
self.add_constant("ROM_DISABLE", 1)
self.flash_boot_address = self.mem_map["spiflash"]+self.gateware_size+bios_size
self.flash_boot_address = self.mem_map["spiflash"]+platform.gateware_size+bios_size
self.add_memory_region("user_flash",
self.flash_boot_address,
# Leave a grace area- possible one-by-off bug in add_memory_region?
@ -171,6 +206,13 @@ class BaseSoC(SoCCore):
else:
raise ValueError("unrecognized boot_source: {}".format(boot_source))
# Add USB pads
usb_pads = platform.request("usb")
usb_iobuf = usbio.IoBuf(usb_pads.d_p, usb_pads.d_n, usb_pads.pullup)
self.submodules.usb = epfifo.PerEndpointFifoInterface(usb_iobuf, endpoints=[EndpointType.BIDIR])
# self.submodules.usb = epmem.MemInterface(usb_iobuf)
# self.submodules.usb = unififo.UsbUniFifo(usb_iobuf)
# Disable final deep-sleep power down so firmware words are loaded
# onto softcore's address bus.
platform.toolchain.build_template[3] = "icepack -s {build_name}.txt {build_name}.bin"