From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Tue, 23 Sep 2014 22:01:01 +0000 (+0200)
Subject: add ctrl skeleton
X-Git-Tag: 24jan2021_ls180~2572^2~206
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=71bfd036d0d7065f615942c27b9dc181391eed4f;p=litex.git

add ctrl skeleton
---

diff --git a/lib/sata/k7sataphy/ctrl.py b/lib/sata/k7sataphy/ctrl.py
new file mode 100644
index 00000000..7f762eae
--- /dev/null
+++ b/lib/sata/k7sataphy/ctrl.py
@@ -0,0 +1,106 @@
+from migen.fhdl.std import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
+from migen.genlib.fsm import FSM, NextState
+
+def us(self, t, speed="SATA3", margin=True):
+	clk_freq = {
+		"SATA3" :	300*1000000,
+		"SATA2" :	150*1000000,
+		"SATA1" :	 75*1000000
+	}
+	clk_period_us = 1000000/clk_freq
+	if margin:
+		t += clk_period_us/2
+	return ceil(t/clk_period_us)
+
+class K7SATAPHYHostCtrl(Module):
+	def __init__(self, gtx):
+		self.link_up = Signal()
+
+		tx_com_done = Signal()
+		align_timeout = Signal()
+		align_detect = Signal()
+
+		fsm = FSM(reset_state="IDLE")
+		self.submodules += fsm
+
+		fsm.act("RESET",
+			gtx.txcominit.eq(1),
+			gtx.txelecidle.eq(1),
+			If(tx_com_done & ~gtx.rxcominitdet),
+				NextState("AWAIT_COMINIT")
+			)
+		)
+		fsm.act("AWAIT_COMINIT",
+			gtx.txelecidle.eq(1),
+			If(gtx.rxcominitdet,
+				NextState("AWAIT_NO_COMINIT")
+			).Else(
+				If(retry_cnt == 0,
+					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),
+			gtx.txcomwake.eq(1),
+			If(tx_com_done,
+				NextState("AWAIT_COMWAKE")
+			)
+		)
+		fsm.act("AWAIT_COMWAKE",
+			gtx.txelecidle.eq(1),
+			If(gtx.rxcomwakedet,
+				NextState("AWAIT_NO_COMWAKE")
+			).Else(
+				If(retry_cnt == 0,
+					NextState("RESET")
+				)
+			)
+		)
+		fsm.act("AWAIT_NO_COMWAKE",
+			gtx.txelecidle.eq(1),
+			If(~gtx.rxcomwakedet,
+				NextState("AWAIT_ALIGN")
+			)
+		)
+		fsm.act("AWAIT_ALIGN",
+			gtx.txelecidle.eq(0),
+			gtx.txdata.eq(0x4A4A), #D10.2
+			gtx.txcharisk.eq(0b0000),
+			If(align_detect & ~align_timeout,
+				NextState("SEND_ALIGN")
+			).Elif(~align_detect & align_timeout,
+				NextState("RESET")
+			)
+		)
+		fsm.act("SEND_ALIGN",
+			gtx.txelecidle.eq(0),
+			gtx.txdata.eq(ALIGN_VAL),
+			gtx.txcharisk.eq(0b0001),
+			If(non_align_cnt == 3,
+				NextState("READY")
+			)
+		)
+		fsm.act("READY",
+			gtx.txelecidle.eq(0),
+			gtx.txdata.eq(SYNC_VAL),
+			gtx.txcharisk.eq(0b0001),
+			If(gtx.rxelecidle,
+				NextState("RESET")
+			),
+			self.link_up.eq(1)
+		)
+
+class K7SATAPHYDeviceCtrl(Module):
+	def __init__(self, gtx):
diff --git a/lib/sata/k7sataphy/std.py b/lib/sata/k7sataphy/std.py
index b8058b94..283a8c84 100644
--- a/lib/sata/k7sataphy/std.py
+++ b/lib/sata/k7sataphy/std.py
@@ -2,6 +2,25 @@ from migen.fhdl.std import *
 
 K28_5 = 0b1010000011
 
+ALIGN_VAL   = 0x7B4A4ABC
+CONT_VAL    = 0x9999AA7C
+DMAT_VAL    = 0x3636B57C
+EOF_VAL     = 0xD5D5B57C
+HOLD_VAL    = 0xD5D5AA7C
+HOLDA_VAL   = 0x9595AA7C
+PMACK_VAL   = 0x9595957C
+PMNAK_VAL   = 0xF5F5957C
+PMREQ_P_VAL = 0x1717B57C
+PMREQ_S_VAL = 0x7575957C
+R_ERR_VAL   = 0x5656B57C
+R_IP_VAL    = 0x5555B57C
+R_OK_VAL    = 0x3535B57C
+R_RDY_VAL   = 0x4A4A957C
+SOF_VAL     = 0x3737B57C
+SYNC_VAL    = 0xB5B5957C
+WTRM_VAL    = 0x5858B57C
+X_RDY_VAL   = 0x5757B57C
+
 def _ones(width):
 	return 2**width-1