i2c, uart: Use Synchronizer primitives for the inputs

[sifive-blocks.git] / src / main / scala / devices / uart / UARTPeriphery.scala

diff --git a/src/main/scala/devices/uart/UARTPeriphery.scala b/src/main/scala/devices/uart/UARTPeriphery.scala
index d94d5180941502ff3e3bc0f872d248f582c973d0..f24cbadcdf2a1d39a5848797a40476f7a50b9dfe 100644 (file)
--- a/src/main/scala/devices/uart/UARTPeriphery.scala
+++ b/src/main/scala/devices/uart/UARTPeriphery.scala
@@ -4,20 +4,20 @@ package sifive.blocks.devices.uart
 import Chisel._
 import chisel3.experimental.{withClockAndReset}
 import freechips.rocketchip.config.Field
+import freechips.rocketchip.util.SynchronizerShiftRegInit
+import freechips.rocketchip.coreplex.{HasPeripheryBus, PeripheryBusParams, HasInterruptBus}
 import freechips.rocketchip.diplomacy.{LazyModule, LazyMultiIOModuleImp}
-import freechips.rocketchip.chip.HasSystemNetworks
-import freechips.rocketchip.tilelink.TLFragmenter
-import sifive.blocks.devices.pinctrl.{Pin, PinCtrl}
-import sifive.blocks.util.ShiftRegisterInit
+import sifive.blocks.devices.pinctrl.{Pin}
 
 case object PeripheryUARTKey extends Field[Seq[UARTParams]]
 
-trait HasPeripheryUART extends HasSystemNetworks {
-  val uartParams = p(PeripheryUARTKey)  
+trait HasPeripheryUART extends HasPeripheryBus with HasInterruptBus {
+  private val divinit = (p(PeripheryBusParams).frequency / 115200).toInt
+  val uartParams = p(PeripheryUARTKey).map(_.copy(divisorInit = divinit))
   val uarts = uartParams map { params =>
-    val uart = LazyModule(new TLUART(peripheryBusBytes, params))
-    uart.node := TLFragmenter(peripheryBusBytes, cacheBlockBytes)(peripheryBus.node)
-    intBus.intnode := uart.intnode
+    val uart = LazyModule(new TLUART(pbus.beatBytes, params))
+    uart.node := pbus.toVariableWidthSlaves
+    ibus.fromSync := uart.intnode
     uart
   }
 }
@@ -44,11 +44,14 @@ class UARTPins[T <: Pin] (pingen: () => T) extends Bundle {
   val rxd = pingen()
   val txd = pingen()
 
-  def fromUARTPort(uart: UARTPortIO, clock: Clock, reset: Bool, syncStages: Int = 0) {
+  override def cloneType: this.type =
+    this.getClass.getConstructors.head.newInstance(pingen).asInstanceOf[this.type]
+
+  def fromPort(uart: UARTPortIO, clock: Clock, reset: Bool, syncStages: Int = 0) {
     withClockAndReset(clock, reset) {
       txd.outputPin(uart.txd)
       val rxd_t = rxd.inputPin()
-      uart.rxd := ShiftRegisterInit(rxd_t, syncStages, Bool(true))
+      uart.rxd := SynchronizerShiftRegInit(rxd_t, n = syncStages, init = Bool(true))
     }
   }
 }