From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Mon, 2 Mar 2015 07:23:02 +0000 (+0100)
Subject: move dma_lasmi to MiSoC
X-Git-Tag: 24jan2021_ls180~2099^2~222
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7d68ecbd869f25c1cec2d2cbac532f0cf9c0ad59;p=litex.git

move dma_lasmi to MiSoC
---

diff --git a/migen/actorlib/dma_lasmi.py b/migen/actorlib/dma_lasmi.py
deleted file mode 100644
index de31bda7..00000000
--- a/migen/actorlib/dma_lasmi.py
+++ /dev/null
@@ -1,89 +0,0 @@
-from migen.fhdl.std import *
-from migen.flow.actor import *
-from migen.genlib.fifo import SyncFIFO
-
-class Reader(Module):
-	def __init__(self, lasmim, fifo_depth=None):
-		self.address = Sink([("a", lasmim.aw)])
-		self.data = Source([("d", lasmim.dw)])
-		self.busy = Signal()
-
-		###
-
-		if fifo_depth is None:
-			fifo_depth = lasmim.req_queue_size + lasmim.read_latency + 2
-
-		# request issuance
-		request_enable = Signal()
-		request_issued = Signal()
-
-		self.comb += [
-			lasmim.we.eq(0),
-			lasmim.stb.eq(self.address.stb & request_enable),
-			lasmim.adr.eq(self.address.a),
-			self.address.ack.eq(lasmim.req_ack & request_enable),
-			request_issued.eq(lasmim.stb & lasmim.req_ack)
-		]
-
-		# FIFO reservation level counter
-		# incremented when data is planned to be queued
-		# decremented when data is dequeued
-		data_dequeued = Signal()
-		rsv_level = Signal(max=fifo_depth+1)
-		self.sync += [
-			If(request_issued,
-				If(~data_dequeued, rsv_level.eq(rsv_level + 1))
-			).Elif(data_dequeued,
-				rsv_level.eq(rsv_level - 1)
-			)
-		]
-		self.comb += [
-			self.busy.eq(rsv_level != 0),
-			request_enable.eq(rsv_level != fifo_depth)
-		]
-
-		# FIFO
-		fifo = SyncFIFO(lasmim.dw, fifo_depth)
-		self.submodules += fifo
-
-		self.comb += [
-			fifo.din.eq(lasmim.dat_r),
-			fifo.we.eq(lasmim.dat_r_ack),
-
-			self.data.stb.eq(fifo.readable),
-			fifo.re.eq(self.data.ack),
-			self.data.d.eq(fifo.dout),
-			data_dequeued.eq(self.data.stb & self.data.ack)
-		]
-
-
-class Writer(Module):
-	def __init__(self, lasmim, fifo_depth=None):
-		self.address_data = Sink([("a", lasmim.aw), ("d", lasmim.dw)])
-		self.busy = Signal()
-
-		###
-
-		if fifo_depth is None:
-			fifo_depth = lasmim.req_queue_size + lasmim.write_latency + 2
-
-		fifo = SyncFIFO(lasmim.dw, fifo_depth)
-		self.submodules += fifo
-
-		self.comb += [
-			lasmim.we.eq(1),
-			lasmim.stb.eq(fifo.writable & self.address_data.stb),
-			lasmim.adr.eq(self.address_data.a),
-			self.address_data.ack.eq(fifo.writable & lasmim.req_ack),
-			fifo.we.eq(self.address_data.stb & lasmim.req_ack),
-			fifo.din.eq(self.address_data.d)
-		]
-
-		self.comb += [
-			fifo.re.eq(lasmim.dat_w_ack),
-			If(data_valid,
-				lasmim.dat_we.eq(2**(lasmim.dw//8)-1),
-				lasmim.dat_w.eq(fifo.dout)
-			),
-			self.busy.eq(fifo.readable)
-		]