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litex_acorn_baseboard_mini: Allow simultaneous pcie and ethernet.

This commit is contained in:
Florent Kermarrec 2024-06-18 13:55:01 +02:00
parent 805a520b5a
commit 6857418deb
1 changed files with 56 additions and 25 deletions
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37
litex_boards/targets/litex_acorn_baseboard_mini.py
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@ -76,7 +76,7 @@ class CRG(LiteXModule):
# IDelayCtrl.
if with_dram:
self.comb += self.cd_idelay.clk.eq(clk200_se)
self.specials += Instance("BUFG", i_I=clk200_se, o_O=self.cd_idelay.clk)
self.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
# Eth PLL.
@ -144,8 +144,11 @@ class BaseSoC(SoCCore):
platform.toolchain.pre_placement_commands.append("reset_property LOC [get_cells -hierarchical -filter {{NAME=~pcie_s7/*gtp_channel.gtpe2_channel_i}}]")
platform.toolchain.pre_placement_commands.append("set_property LOC GTPE2_CHANNEL_X0Y7 [get_cells -hierarchical -filter {{NAME=~pcie_s7/*gtp_channel.gtpe2_channel_i}}]")
# Ethernet / SATA RefClk/Shared-QPLL -------------------------------------------------------
# PCIe / Ethernet / SATA / Shared-QPLL -----------------------------------------------------
assert not (with_pcie and with_sata)
if not with_pcie:
# Ethernet QPLL Settings.
qpll_eth_settings = QPLLSettings(
refclksel = 0b111,
@ -153,6 +156,7 @@ class BaseSoC(SoCCore):
fbdiv_45 = 4,
refclk_div = 1,
)
platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-49]")
# SATA QPLL Settings.
qpll_sata_settings = QPLLSettings(
@ -161,6 +165,7 @@ class BaseSoC(SoCCore):
fbdiv_45 = 4,
refclk_div = 1,
)
platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-49]")
# Shared QPLL.
self.qpll = qpll = QPLL(
@ -169,8 +174,34 @@ class BaseSoC(SoCCore):
gtgrefclk1 = Open() if not with_sata else self.crg.cd_sata_ref.clk,
qpllsettings1 = None if not with_sata else qpll_sata_settings,
)
if with_pcie:
# PCIe QPLL Settings.
qpll_pcie_settings = QPLLSettings(
refclksel = 0b001,
fbdiv = 5,
fbdiv_45 = 5,
refclk_div = 1,
)
# Ethernet QPLL Settings.
qpll_eth_settings = QPLLSettings(
refclksel = 0b111,
fbdiv = 4,
fbdiv_45 = 4,
refclk_div = 1,
)
platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-49]")
# Shared QPLL.
self.qpll = qpll = QPLL(
gtrefclk0 = Open() if not with_pcie else self.pcie_phy.pcie_refclk,
qpllsettings0 = None if not with_pcie else qpll_pcie_settings,
gtgrefclk1 = Open() if not with_eth else self.crg.cd_eth_ref.clk,
qpllsettings1 = None if not with_eth else qpll_eth_settings,
)
self.pcie_phy.use_external_qpll(qpll_channel=qpll.channels[0])
# Ethernet / Etherbone ---------------------------------------------------------------------
if with_ethernet or with_etherbone:
_eth_io = [
@ -184,7 +215,7 @@ class BaseSoC(SoCCore):
platform.add_extension(_eth_io)
self.ethphy = A7_1000BASEX(
qpll_channel = qpll.channels[0],
qpll_channel = qpll.channels[1 if with_pcie else 0],
data_pads = self.platform.request("sfp"),
sys_clk_freq = sys_clk_freq,
rx_polarity = 1, # Inverted on Acorn.