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phy/a7_gtp: Allow using GTGREFCLK0/1 input as reference clocks. 

Useful when reference clock is generated from a PLL or MMCM.
This commit is contained in:
Florent Kermarrec 2024-04-04 10:50:47 +02:00
parent c1dc02093d
commit 3c1f4dbf6c
1 changed files with 15 additions and 12 deletions
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27
liteeth/phy/a7_gtp.py
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@ -27,7 +27,9 @@ class QPLLChannel:
class QPLL(Module): class QPLL(Module):
def __init__(self, gtrefclk0, qpllsettings0, gtrefclk1=0, qpllsettings1=None): def __init__(self,
gtrefclk0=0, qpllsettings0=None, gtgrefclk0=0,
gtrefclk1=0, qpllsettings1=None, gtgrefclk1=1):
self.channels = [] self.channels = []
channel_settings = dict() channel_settings = dict()
@ -52,17 +54,18 @@ class QPLL(Module):
add_setting("o_PLLXOUTCLK", channel.clk) add_setting("o_PLLXOUTCLK", channel.clk)
add_setting("o_PLLXOUTREFCLK", channel.refclk) add_setting("o_PLLXOUTREFCLK", channel.refclk)
self.specials += \ self.specials += Instance("GTPE2_COMMON",
Instance("GTPE2_COMMON", i_GTREFCLK0 = gtrefclk0,
i_GTREFCLK0 = gtrefclk0, i_GTREFCLK1 = gtrefclk1,
i_GTREFCLK1 = gtrefclk1, i_GTGREFCLK0 = gtgrefclk0,
i_BGBYPASSB = 1, i_GTGREFCLK1 = gtgrefclk1,
i_BGMONITORENB = 1, i_BGBYPASSB = 1,
i_BGPDB = 1, i_BGMONITORENB = 1,
i_BGRCALOVRD = 0b11111, i_BGPDB = 1,
i_RCALENB = 1, i_BGRCALOVRD = 0b11111,
**channel_settings i_RCALENB = 1,
) **channel_settings
)
class GTPTxInit(Module): class GTPTxInit(Module):