--- /dev/null
+/******************************************************************************
+*
+* Copyright (C) 2010 - 2015 Xilinx, Inc. All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* Use of the Software is limited solely to applications:
+* (a) running on a Xilinx device, or
+* (b) that interact with a Xilinx device through a bus or interconnect.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+* Except as contained in this notice, the name of the Xilinx shall not be used
+* in advertising or otherwise to promote the sale, use or other dealings in
+* this Software without prior written authorization from Xilinx.
+*
+******************************************************************************/
+/*****************************************************************************/
+/**
+*
+* @file xemacps_intr.c
+* @addtogroup emacps_v3_1
+* @{
+*
+* Functions in this file implement general purpose interrupt processing related
+* functionality. See xemacps.h for a detailed description of the driver.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver Who Date Changes
+* ----- ---- -------- -------------------------------------------------------
+* 1.00a wsy 01/10/10 First release
+* 1.03a asa 01/24/13 Fix for CR #692702 which updates error handling for
+* Rx errors. Under heavy Rx traffic, there will be a large
+* number of errors related to receive buffer not available.
+* Because of a HW bug (SI #692601), under such heavy errors,
+* the Rx data path can become unresponsive. To reduce the
+* probabilities for hitting this HW bug, the SW writes to
+* bit 18 to flush a packet from Rx DPRAM immediately. The
+* changes for it are done in the function
+* XEmacPs_IntrHandler.
+* 2.1 srt 07/15/14 Add support for Zynq Ultrascale Mp GEM specification
+* and 64-bit changes.
+* 3.0 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
+* 3.1 hk 07/27/15 Do not call error handler with '0' error code when
+* there is no error. CR# 869403
+* </pre>
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+
+#include "xemacps.h"
+
+/************************** Constant Definitions *****************************/
+
+
+/**************************** Type Definitions *******************************/
+
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+
+/************************** Function Prototypes ******************************/
+
+
+/************************** Variable Definitions *****************************/
+
+
+/*****************************************************************************/
+/**
+ * Install an asynchronious handler function for the given HandlerType:
+ *
+ * @param InstancePtr is a pointer to the instance to be worked on.
+ * @param HandlerType indicates what interrupt handler type is.
+ * XEMACPS_HANDLER_DMASEND, XEMACPS_HANDLER_DMARECV and
+ * XEMACPS_HANDLER_ERROR.
+ * @param FuncPointer is the pointer to the callback function
+ * @param CallBackRef is the upper layer callback reference passed back when
+ * when the callback function is invoked.
+ *
+ * @return
+ *
+ * None.
+ *
+ * @note
+ * There is no assert on the CallBackRef since the driver doesn't know what
+ * it is.
+ *
+ *****************************************************************************/
+LONG XEmacPs_SetHandler(XEmacPs *InstancePtr, u32 HandlerType,
+ void *FuncPointer, void *CallBackRef)
+{
+ LONG Status;
+ Xil_AssertNonvoid(InstancePtr != NULL);
+ Xil_AssertNonvoid(FuncPointer != NULL);
+ Xil_AssertNonvoid(InstancePtr->IsReady == (u32)XIL_COMPONENT_IS_READY);
+
+ switch (HandlerType) {
+ case XEMACPS_HANDLER_DMASEND:
+ Status = (LONG)(XST_SUCCESS);
+ InstancePtr->SendHandler = ((XEmacPs_Handler)(void *)FuncPointer);
+ InstancePtr->SendRef = CallBackRef;
+ break;
+ case XEMACPS_HANDLER_DMARECV:
+ Status = (LONG)(XST_SUCCESS);
+ InstancePtr->RecvHandler = ((XEmacPs_Handler)(void *)FuncPointer);
+ InstancePtr->RecvRef = CallBackRef;
+ break;
+ case XEMACPS_HANDLER_ERROR:
+ Status = (LONG)(XST_SUCCESS);
+ InstancePtr->ErrorHandler = ((XEmacPs_ErrHandler)(void *)FuncPointer);
+ InstancePtr->ErrorRef = CallBackRef;
+ break;
+ default:
+ Status = (LONG)(XST_INVALID_PARAM);
+ break;
+ }
+ return Status;
+}
+
+/*****************************************************************************/
+/**
+* Master interrupt handler for EMAC driver. This routine will query the
+* status of the device, bump statistics, and invoke user callbacks.
+*
+* This routine must be connected to an interrupt controller using OS/BSP
+* specific methods.
+*
+* @param XEmacPsPtr is a pointer to the XEMACPS instance that has caused the
+* interrupt.
+*
+******************************************************************************/
+void XEmacPs_IntrHandler(void *XEmacPsPtr)
+{
+ u32 RegISR;
+ u32 RegSR;
+ u32 RegCtrl;
+ u32 RegQ1ISR = 0U;
+ XEmacPs *InstancePtr = (XEmacPs *) XEmacPsPtr;
+
+ Xil_AssertVoid(InstancePtr != NULL);
+ Xil_AssertVoid(InstancePtr->IsReady == (u32)XIL_COMPONENT_IS_READY);
+
+ /* This ISR will try to handle as many interrupts as it can in a single
+ * call. However, in most of the places where the user's error handler
+ * is called, this ISR exits because it is expected that the user will
+ * reset the device in nearly all instances.
+ */
+ RegISR = XEmacPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_ISR_OFFSET);
+
+ /* Read Transmit Q1 ISR */
+
+ if (InstancePtr->Version > 2)
+ RegQ1ISR = XEmacPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_INTQ1_STS_OFFSET);
+
+ /* Clear the interrupt status register */
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress, XEMACPS_ISR_OFFSET,
+ RegISR);
+
+ /* Receive complete interrupt */
+ if ((RegISR & XEMACPS_IXR_FRAMERX_MASK) != 0x00000000U) {
+ /* Clear RX status register RX complete indication but preserve
+ * error bits if there is any */
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_RXSR_OFFSET,
+ ((u32)XEMACPS_RXSR_FRAMERX_MASK |
+ (u32)XEMACPS_RXSR_BUFFNA_MASK));
+ InstancePtr->RecvHandler(InstancePtr->RecvRef);
+ }
+
+ /* Transmit Q1 complete interrupt */
+ if ((InstancePtr->Version > 2) &&
+ ((RegQ1ISR & XEMACPS_INTQ1SR_TXCOMPL_MASK) != 0x00000000U)) {
+ /* Clear TX status register TX complete indication but preserve
+ * error bits if there is any */
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_INTQ1_STS_OFFSET,
+ XEMACPS_INTQ1SR_TXCOMPL_MASK);
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_TXSR_OFFSET,
+ ((u32)XEMACPS_TXSR_TXCOMPL_MASK |
+ (u32)XEMACPS_TXSR_USEDREAD_MASK));
+ InstancePtr->SendHandler(InstancePtr->SendRef);
+ }
+
+ /* Transmit complete interrupt */
+ if ((RegISR & XEMACPS_IXR_TXCOMPL_MASK) != 0x00000000U) {
+ /* Clear TX status register TX complete indication but preserve
+ * error bits if there is any */
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_TXSR_OFFSET,
+ ((u32)XEMACPS_TXSR_TXCOMPL_MASK |
+ (u32)XEMACPS_TXSR_USEDREAD_MASK));
+ InstancePtr->SendHandler(InstancePtr->SendRef);
+ }
+
+ /* Receive error conditions interrupt */
+ if ((RegISR & XEMACPS_IXR_RX_ERR_MASK) != 0x00000000U) {
+ /* Clear RX status register */
+ RegSR = XEmacPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_RXSR_OFFSET);
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_RXSR_OFFSET, RegSR);
+
+ /* Fix for CR # 692702. Write to bit 18 of net_ctrl
+ * register to flush a packet out of Rx SRAM upon
+ * an error for receive buffer not available. */
+ if ((RegISR & XEMACPS_IXR_RXUSED_MASK) != 0x00000000U) {
+ RegCtrl =
+ XEmacPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_NWCTRL_OFFSET);
+ RegCtrl |= (u32)XEMACPS_NWCTRL_FLUSH_DPRAM_MASK;
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_NWCTRL_OFFSET, RegCtrl);
+ }
+
+ if(RegSR != 0) {
+ InstancePtr->ErrorHandler(InstancePtr->ErrorRef,
+ XEMACPS_RECV, RegSR);
+ }
+ }
+
+ /* When XEMACPS_IXR_TXCOMPL_MASK is flaged, XEMACPS_IXR_TXUSED_MASK
+ * will be asserted the same time.
+ * Have to distinguish this bit to handle the real error condition.
+ */
+ /* Transmit Q1 error conditions interrupt */
+ if ((InstancePtr->Version > 2) &&
+ ((RegQ1ISR & XEMACPS_INTQ1SR_TXERR_MASK) != 0x00000000U) &&
+ ((RegQ1ISR & XEMACPS_INTQ1SR_TXCOMPL_MASK) != 0x00000000U)) {
+ /* Clear Interrupt Q1 status register */
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_INTQ1_STS_OFFSET, RegQ1ISR);
+ InstancePtr->ErrorHandler(InstancePtr->ErrorRef, XEMACPS_SEND,
+ RegQ1ISR);
+ }
+
+ /* Transmit error conditions interrupt */
+ if (((RegISR & XEMACPS_IXR_TX_ERR_MASK) != 0x00000000U) &&
+ (!(RegISR & XEMACPS_IXR_TXCOMPL_MASK) != 0x00000000U)) {
+ /* Clear TX status register */
+ RegSR = XEmacPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_TXSR_OFFSET);
+ XEmacPs_WriteReg(InstancePtr->Config.BaseAddress,
+ XEMACPS_TXSR_OFFSET, RegSR);
+ InstancePtr->ErrorHandler(InstancePtr->ErrorRef, XEMACPS_SEND,
+ RegSR);
+ }
+
+}
+/** @} */
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