107 lines
2.1 KiB
Python
107 lines
2.1 KiB
Python
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from migen.fhdl.std import *
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from migen.genlib.resetsync import AsyncResetSynchronizer
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from migen.genlib.fsm import FSM, NextState
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def us(self, t, speed="SATA3", margin=True):
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clk_freq = {
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"SATA3" : 300*1000000,
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"SATA2" : 150*1000000,
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"SATA1" : 75*1000000
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}
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clk_period_us = 1000000/clk_freq
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if margin:
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t += clk_period_us/2
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return ceil(t/clk_period_us)
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class K7SATAPHYHostCtrl(Module):
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def __init__(self, gtx):
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self.link_up = Signal()
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tx_com_done = Signal()
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align_timeout = Signal()
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align_detect = Signal()
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fsm = FSM(reset_state="IDLE")
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self.submodules += fsm
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fsm.act("RESET",
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gtx.txcominit.eq(1),
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gtx.txelecidle.eq(1),
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If(tx_com_done & ~gtx.rxcominitdet),
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NextState("AWAIT_COMINIT")
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)
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)
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fsm.act("AWAIT_COMINIT",
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gtx.txelecidle.eq(1),
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If(gtx.rxcominitdet,
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NextState("AWAIT_NO_COMINIT")
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).Else(
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If(retry_cnt == 0,
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NextState("RESET")
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)
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)
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)
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fsm.act("AWAIT_NO_COMINIT",
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gtx.txelecidle.eq(1),
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If(~gtx.rxcominitdet,
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NextState("CALIBRATE")
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)
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)
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fsm.act("CALIBRATE",
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gtx.txelecidle.eq(1),
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NextState("COMWAKE")
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)
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fsm.act("COMWAKE",
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gtx.txelecidle.eq(1),
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gtx.txcomwake.eq(1),
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If(tx_com_done,
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NextState("AWAIT_COMWAKE")
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)
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)
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fsm.act("AWAIT_COMWAKE",
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gtx.txelecidle.eq(1),
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If(gtx.rxcomwakedet,
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NextState("AWAIT_NO_COMWAKE")
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).Else(
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If(retry_cnt == 0,
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NextState("RESET")
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)
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)
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)
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fsm.act("AWAIT_NO_COMWAKE",
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gtx.txelecidle.eq(1),
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If(~gtx.rxcomwakedet,
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NextState("AWAIT_ALIGN")
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)
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)
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fsm.act("AWAIT_ALIGN",
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gtx.txelecidle.eq(0),
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gtx.txdata.eq(0x4A4A), #D10.2
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gtx.txcharisk.eq(0b0000),
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If(align_detect & ~align_timeout,
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NextState("SEND_ALIGN")
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).Elif(~align_detect & align_timeout,
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NextState("RESET")
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)
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)
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fsm.act("SEND_ALIGN",
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gtx.txelecidle.eq(0),
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gtx.txdata.eq(ALIGN_VAL),
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gtx.txcharisk.eq(0b0001),
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If(non_align_cnt == 3,
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NextState("READY")
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)
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)
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fsm.act("READY",
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gtx.txelecidle.eq(0),
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gtx.txdata.eq(SYNC_VAL),
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gtx.txcharisk.eq(0b0001),
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If(gtx.rxelecidle,
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NextState("RESET")
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),
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self.link_up.eq(1)
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)
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class K7SATAPHYDeviceCtrl(Module):
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def __init__(self, gtx):
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