308 lines
6.7 KiB
Python
308 lines
6.7 KiB
Python
from math import ceil
|
|
|
|
from migen.fhdl.std import *
|
|
from migen.genlib.resetsync import AsyncResetSynchronizer
|
|
from migen.genlib.fsm import FSM, NextState
|
|
from migen.flow.actor import Sink, Source
|
|
|
|
from lib.sata.common import *
|
|
|
|
def us(t, clk_freq):
|
|
clk_period_us = 1000000/clk_freq
|
|
return ceil(t/clk_period_us)
|
|
|
|
class K7SATAPHYHostCtrl(Module):
|
|
def __init__(self, gtx, crg, clk_freq):
|
|
self.ready = Signal()
|
|
|
|
self.sink = Sink(phy_description(32))
|
|
self.source = Source(phy_description(32))
|
|
|
|
self.align_detect = align_detect = Signal()
|
|
align_timeout_cnt = Signal(32)
|
|
align_timeout = Signal()
|
|
|
|
retry_timeout_cnt = Signal(32)
|
|
retry_timeout = Signal()
|
|
|
|
non_align_cnt = Signal(4)
|
|
|
|
txcominit = Signal()
|
|
txcomwake = Signal()
|
|
|
|
self.comb += [
|
|
self.source.stb.eq(1),
|
|
self.sink.ack.eq(1)
|
|
]
|
|
|
|
fsm = FSM(reset_state="RESET")
|
|
self.submodules += fsm
|
|
|
|
fsm.act("RESET",
|
|
gtx.txelecidle.eq(1),
|
|
If(crg.ready,
|
|
NextState("COMINIT")
|
|
),
|
|
)
|
|
fsm.act("COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
txcominit.eq(1),
|
|
If(gtx.txcomfinish & ~gtx.rxcominitdet,
|
|
NextState("AWAIT_COMINIT")
|
|
),
|
|
)
|
|
fsm.act("AWAIT_COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
If(gtx.rxcominitdet,
|
|
NextState("AWAIT_NO_COMINIT")
|
|
).Else(
|
|
If(retry_timeout,
|
|
NextState("RESET")
|
|
)
|
|
),
|
|
)
|
|
fsm.act("AWAIT_NO_COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
If(~gtx.rxcominitdet,
|
|
NextState("CALIBRATE")
|
|
),
|
|
)
|
|
fsm.act("CALIBRATE",
|
|
gtx.txelecidle.eq(1),
|
|
NextState("COMWAKE"),
|
|
)
|
|
fsm.act("COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
txcomwake.eq(1),
|
|
If(gtx.txcomfinish,
|
|
NextState("AWAIT_COMWAKE")
|
|
),
|
|
)
|
|
fsm.act("AWAIT_COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
If(gtx.rxcomwakedet,
|
|
NextState("AWAIT_NO_COMWAKE")
|
|
).Else(
|
|
If(retry_timeout,
|
|
NextState("RESET")
|
|
)
|
|
),
|
|
)
|
|
fsm.act("AWAIT_NO_COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
If(~gtx.rxcomwakedet,
|
|
NextState("AWAIT_NO_RXELECIDLE")
|
|
),
|
|
)
|
|
fsm.act("AWAIT_NO_RXELECIDLE",
|
|
gtx.txelecidle.eq(0),
|
|
self.source.data.eq(0x4A4A4A4A), #D10.2
|
|
self.source.charisk.eq(0b0000),
|
|
If(~gtx.rxelecidle,
|
|
NextState("AWAIT_ALIGN"),
|
|
crg.reset.eq(1),
|
|
gtx.pmarxreset.eq(1)
|
|
),
|
|
)
|
|
fsm.act("AWAIT_ALIGN",
|
|
gtx.txelecidle.eq(0),
|
|
self.source.data.eq(0x4A4A4A4A), #D10.2
|
|
self.source.charisk.eq(0b0000),
|
|
gtx.rxalign.eq(1),
|
|
If((align_detect & ~gtx.rxelecidle) & ~align_timeout,
|
|
NextState("SEND_ALIGN")
|
|
).Elif(~align_detect & align_timeout,
|
|
NextState("RESET")
|
|
),
|
|
)
|
|
fsm.act("SEND_ALIGN",
|
|
gtx.txelecidle.eq(0),
|
|
gtx.rxalign.eq(1),
|
|
self.source.data.eq(primitives["ALIGN"]),
|
|
self.source.charisk.eq(0b0001),
|
|
If(non_align_cnt == 3,
|
|
NextState("READY")
|
|
),
|
|
)
|
|
fsm.act("READY",
|
|
gtx.txelecidle.eq(0),
|
|
gtx.rxalign.eq(1),
|
|
self.source.data.eq(primitives["SYNC"]),
|
|
self.source.charisk.eq(0b0001),
|
|
If(gtx.rxelecidle,
|
|
NextState("RESET")
|
|
),
|
|
self.ready.eq(1),
|
|
)
|
|
|
|
txcominit_d = Signal()
|
|
txcomwake_d = Signal()
|
|
self.sync += [
|
|
txcominit_d.eq(txcominit),
|
|
txcomwake_d.eq(txcomwake),
|
|
gtx.txcominit.eq(txcominit & ~txcominit_d),
|
|
gtx.txcomwake.eq(txcomwake & ~txcomwake_d),
|
|
]
|
|
|
|
self.comb += align_detect.eq(self.sink.stb & (self.sink.data == primitives["ALIGN"]));
|
|
self.sync += \
|
|
If(fsm.ongoing("RESET"),
|
|
align_timeout_cnt.eq(us(873, clk_freq))
|
|
).Elif(fsm.ongoing("AWAIT_ALIGN"),
|
|
align_timeout_cnt.eq(align_timeout_cnt-1)
|
|
)
|
|
self.comb += align_timeout.eq(align_timeout_cnt == 0)
|
|
|
|
self.sync += \
|
|
If(fsm.ongoing("RESET") | fsm.ongoing("AWAIT_NO_COMINIT"),
|
|
retry_timeout_cnt.eq(us(10000, clk_freq))
|
|
).Elif(fsm.ongoing("AWAIT_COMINIT") | fsm.ongoing("AWAIT_COMWAKE"),
|
|
retry_timeout_cnt.eq(retry_timeout_cnt-1)
|
|
)
|
|
self.comb += retry_timeout.eq(retry_timeout_cnt == 0)
|
|
|
|
self.sync += \
|
|
If(fsm.ongoing("SEND_ALIGN"),
|
|
If(self.sink.stb,
|
|
If(self.sink.data[0:8] == 0x7C,
|
|
non_align_cnt.eq(non_align_cnt + 1)
|
|
).Else(
|
|
non_align_cnt.eq(0)
|
|
)
|
|
)
|
|
)
|
|
|
|
class K7SATAPHYDeviceCtrl(Module):
|
|
def __init__(self, gtx, crg, clk_freq):
|
|
self.ready = Signal()
|
|
|
|
self.sink = Sink(phy_description(32))
|
|
self.source = Source(phy_description(32))
|
|
|
|
align_detect = Signal()
|
|
align_timeout = Signal()
|
|
align_timeout_cnt = Signal(32)
|
|
|
|
retry_timeout_cnt = Signal(32)
|
|
retry_timeout = Signal()
|
|
|
|
txcominit = Signal()
|
|
txcomwake = Signal()
|
|
|
|
self.comb += [
|
|
self.source.stb.eq(1),
|
|
self.sink.ack.eq(1)
|
|
]
|
|
|
|
fsm = FSM(reset_state="RESET")
|
|
self.submodules += fsm
|
|
|
|
fsm.act("RESET",
|
|
gtx.txelecidle.eq(1),
|
|
If(crg.ready,
|
|
NextState("AWAIT_COMINIT")
|
|
)
|
|
)
|
|
fsm.act("AWAIT_COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
If(gtx.rxcominitdet,
|
|
NextState("AWAIT_NO_COMINIT")
|
|
)
|
|
)
|
|
fsm.act("AWAIT_NO_COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
If(~gtx.rxcominitdet,
|
|
NextState("COMINIT")
|
|
)
|
|
)
|
|
fsm.act("COMINIT",
|
|
gtx.txelecidle.eq(1),
|
|
txcominit.eq(1),
|
|
If(gtx.txcomfinish,
|
|
NextState("AWAIT_COMWAKE")
|
|
)
|
|
)
|
|
fsm.act("AWAIT_COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
If(gtx.rxcomwakedet,
|
|
NextState("AWAIT_NO_COMWAKE")
|
|
).Else(
|
|
If(retry_timeout,
|
|
NextState("RESET")
|
|
)
|
|
)
|
|
)
|
|
fsm.act("AWAIT_NO_COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
If(~gtx.rxcomwakedet,
|
|
NextState("CALIBRATE")
|
|
)
|
|
)
|
|
fsm.act("CALIBRATE",
|
|
gtx.txelecidle.eq(1),
|
|
NextState("COMWAKE")
|
|
)
|
|
fsm.act("COMWAKE",
|
|
gtx.txelecidle.eq(1),
|
|
txcomwake.eq(1),
|
|
If(gtx.txcomfinish,
|
|
NextState("RESET_CRG"),
|
|
crg.reset.eq(1),
|
|
)
|
|
)
|
|
fsm.act("RESET_CRG",
|
|
gtx.txelecidle.eq(0),
|
|
If(crg.ready,
|
|
NextState("SEND_ALIGN")
|
|
)
|
|
)
|
|
fsm.act("SEND_ALIGN",
|
|
gtx.txelecidle.eq(0),
|
|
gtx.rxalign.eq(1),
|
|
self.source.data.eq(primitives["ALIGN"]),
|
|
self.source.charisk.eq(0b0001),
|
|
If(align_detect,
|
|
NextState("READY")
|
|
).Elif(align_timeout,
|
|
NextState("ERROR")
|
|
)
|
|
)
|
|
fsm.act("READY",
|
|
gtx.txelecidle.eq(0),
|
|
NextState("READY"),
|
|
If(gtx.rxelecidle,
|
|
NextState("RESET")
|
|
),
|
|
self.ready.eq(1)
|
|
)
|
|
fsm.act("ERROR",
|
|
gtx.txelecidle.eq(1),
|
|
NextState("RESET")
|
|
)
|
|
|
|
txcominit_d = Signal()
|
|
txcomwake_d = Signal()
|
|
self.sync += [
|
|
txcominit_d.eq(txcominit),
|
|
txcomwake_d.eq(txcomwake),
|
|
gtx.txcominit.eq(txcominit & ~txcominit_d),
|
|
gtx.txcomwake.eq(txcomwake & ~txcomwake_d),
|
|
]
|
|
|
|
self.comb += align_detect.eq(self.sink.stb & (self.sink.data == primitives["ALIGN"]));
|
|
self.sync += \
|
|
If(fsm.ongoing("RESET"),
|
|
align_timeout_cnt.eq(us(55, clk_freq))
|
|
).Elif(fsm.ongoing("AWAIT_ALIGN"),
|
|
align_timeout_cnt.eq(align_timeout_cnt-1)
|
|
)
|
|
self.comb += align_timeout.eq(align_timeout_cnt == 0)
|
|
|
|
self.sync += \
|
|
If(fsm.ongoing("RESET"),
|
|
retry_timeout_cnt.eq(us(10000, clk_freq))
|
|
).Elif(fsm.ongoing("AWAIT_COMWAKE"),
|
|
retry_timeout_cnt.eq(retry_timeout_cnt-1)
|
|
)
|
|
self.comb += retry_timeout.eq(retry_timeout_cnt == 0)
|