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Diffstat (limited to 'board/xilinx/xilinx_enet/xemac.c')
| -rw-r--r-- | board/xilinx/xilinx_enet/xemac.c | 844 |
1 files changed, 0 insertions, 844 deletions
diff --git a/board/xilinx/xilinx_enet/xemac.c b/board/xilinx/xilinx_enet/xemac.c deleted file mode 100644 index 48b4ede70..000000000 --- a/board/xilinx/xilinx_enet/xemac.c +++ /dev/null @@ -1,844 +0,0 @@ -/****************************************************************************** -* -* Author: Xilinx, Inc. -* -* -* This program is free software; you can redistribute it and/or modify it -* under the terms of the GNU General Public License as published by the -* Free Software Foundation; either version 2 of the License, or (at your -* option) any later version. -* -* -* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A -* COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS -* ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD, -* XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE -* FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING -* ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. -* XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO -* THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY -* WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM -* CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND -* FITNESS FOR A PARTICULAR PURPOSE. -* -* -* Xilinx hardware products are not intended for use in life support -* appliances, devices, or systems. Use in such applications is -* expressly prohibited. -* -* -* (c) Copyright 2002-2004 Xilinx Inc. -* All rights reserved. -* -* -* You should have received a copy of the GNU General Public License along -* with this program; if not, write to the Free Software Foundation, Inc., -* 675 Mass Ave, Cambridge, MA 02139, USA. -* -******************************************************************************/ -/*****************************************************************************/ -/** -* -* @file xemac.c -* -* The XEmac driver. Functions in this file are the minimum required functions -* for this driver. See xemac.h for a detailed description of the driver. -* -* <pre> -* MODIFICATION HISTORY: -* -* Ver Who Date Changes -* ----- ---- -------- ------------------------------------------------------- -* 1.00a rpm 07/31/01 First release -* 1.00b rpm 02/20/02 Repartitioned files and functions -* 1.00b rpm 07/23/02 Removed the PHY reset from Initialize() -* 1.00b rmm 09/23/02 Removed commented code in Initialize(). Recycled as -* XEmac_mPhyReset macro in xemac_l.h. -* 1.00c rpm 12/05/02 New version includes support for simple DMA -* 1.00c rpm 12/12/02 Changed location of IsStarted assignment in XEmac_Start -* to be sure the flag is set before the device and -* interrupts are enabled. -* 1.00c rpm 02/03/03 SelfTest was not clearing polled mode. Take driver out -* of polled mode in XEmac_Reset() to fix this problem. -* 1.00c rmm 05/13/03 Fixed diab compiler warnings relating to asserts. -* </pre> -******************************************************************************/ - -/***************************** Include Files *********************************/ - -#include "xbasic_types.h" -#include "xemac_i.h" -#include "xio.h" -#include "xipif_v1_23_b.h" /* Uses v1.23b of the IPIF */ - -/************************** Constant Definitions *****************************/ - -/**************************** Type Definitions *******************************/ - -/***************** Macros (Inline Functions) Definitions *********************/ - -/************************** Function Prototypes ******************************/ - -static XStatus ConfigureDma(XEmac * InstancePtr); -static XStatus ConfigureFifo(XEmac * InstancePtr); -static void StubFifoHandler(void *CallBackRef); -static void StubErrorHandler(void *CallBackRef, XStatus ErrorCode); -static void StubSgHandler(void *CallBackRef, XBufDescriptor * BdPtr, - u32 NumBds); - -/************************** Variable Definitions *****************************/ - -/*****************************************************************************/ -/** -* -* Initialize a specific XEmac instance/driver. The initialization entails: -* - Initialize fields of the XEmac structure -* - Clear the Ethernet statistics for this device -* - Initialize the IPIF component with its register base address -* - Configure the FIFO components with their register base addresses. -* - If the device is configured with DMA, configure the DMA channel components -* with their register base addresses. At some later time, memory pools for -* the scatter-gather descriptor lists may be passed to the driver. -* - Reset the Ethernet MAC -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* @param DeviceId is the unique id of the device controlled by this XEmac -* instance. Passing in a device id associates the generic XEmac -* instance to a specific device, as chosen by the caller or application -* developer. -* -* @return -* -* - XST_SUCCESS if initialization was successful -* - XST_DEVICE_IS_STARTED if the device has already been started -* - XST_DEVICE_NOT_FOUND if device configuration information was not found for -* a device with the supplied device ID. -* -* @note -* -* None. -* -******************************************************************************/ -XStatus -XEmac_Initialize(XEmac * InstancePtr, u16 DeviceId) -{ - XStatus Result; - XEmac_Config *ConfigPtr; /* configuration information */ - - XASSERT_NONVOID(InstancePtr != NULL); - - /* - * If the device is started, disallow the initialize and return a status - * indicating it is started. This allows the user to stop the device - * and reinitialize, but prevents a user from inadvertently initializing - */ - if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) { - return XST_DEVICE_IS_STARTED; - } - - /* - * Lookup the device configuration in the temporary CROM table. Use this - * configuration info down below when initializing this component. - */ - ConfigPtr = XEmac_LookupConfig(DeviceId); - if (ConfigPtr == NULL) { - return XST_DEVICE_NOT_FOUND; - } - - /* - * Set some default values - */ - InstancePtr->IsReady = 0; - InstancePtr->IsStarted = 0; - InstancePtr->IpIfDmaConfig = ConfigPtr->IpIfDmaConfig; - InstancePtr->HasMii = ConfigPtr->HasMii; - InstancePtr->HasMulticastHash = FALSE; - - /* Always default polled to false, let user configure this mode */ - InstancePtr->IsPolled = FALSE; - InstancePtr->FifoRecvHandler = StubFifoHandler; - InstancePtr->FifoSendHandler = StubFifoHandler; - InstancePtr->ErrorHandler = StubErrorHandler; - InstancePtr->SgRecvHandler = StubSgHandler; - InstancePtr->SgSendHandler = StubSgHandler; - - /* - * Clear the statistics for this driver - */ - XEmac_mClearStruct((u8 *) & InstancePtr->Stats, sizeof (XEmac_Stats)); - - /* - * Initialize the device register base addresses - */ - InstancePtr->BaseAddress = ConfigPtr->BaseAddress; - - /* - * Configure the send and receive FIFOs in the MAC - */ - Result = ConfigureFifo(InstancePtr); - if (Result != XST_SUCCESS) { - return Result; - } - - /* - * If the device is configured for DMA, configure the send and receive DMA - * channels in the MAC. - */ - if (XEmac_mIsDma(InstancePtr)) { - Result = ConfigureDma(InstancePtr); - if (Result != XST_SUCCESS) { - return Result; - } - } - - /* - * Indicate the component is now ready to use. Note that this is done before - * we reset the device and the PHY below, which may seem a bit odd. The - * choice was made to move it here rather than remove the asserts in various - * functions (e.g., Reset() and all functions that it calls). Applications - * that use multiple threads, one to initialize the XEmac driver and one - * waiting on the IsReady condition could have a problem with this sequence. - */ - InstancePtr->IsReady = XCOMPONENT_IS_READY; - - /* - * Reset the MAC to get it into its initial state. It is expected that - * device configuration by the user will take place after this - * initialization is done, but before the device is started. - */ - XEmac_Reset(InstancePtr); - - return XST_SUCCESS; -} - -/*****************************************************************************/ -/** -* -* Start the Ethernet controller as follows: -* - If not in polled mode -* - Set the internal interrupt enable registers appropriately -* - Enable interrupts within the device itself. Note that connection of -* the driver's interrupt handler to the interrupt source (typically -* done using the interrupt controller component) is done by the higher -* layer software. -* - If the device is configured with scatter-gather DMA, start the DMA -* channels if the descriptor lists are not empty -* - Enable the transmitter -* - Enable the receiver -* -* The PHY is enabled after driver initialization. We assume the upper layer -* software has configured it and the EMAC appropriately before this function -* is called. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* -* @return -* -* - XST_SUCCESS if the device was started successfully -* - XST_NO_CALLBACK if a callback function has not yet been registered using -* the SetxxxHandler function. This is required if in interrupt mode. -* - XST_DEVICE_IS_STARTED if the device is already started -* - XST_DMA_SG_NO_LIST if configured for scatter-gather DMA and a descriptor -* list has not yet been created for the send or receive channel. -* -* @note -* -* The driver tries to match the hardware configuration. So if the hardware -* is configured with scatter-gather DMA, the driver expects to start the -* scatter-gather channels and expects that the user has set up the buffer -* descriptor lists already. If the user expects to use the driver in a mode -* different than how the hardware is configured, the user should modify the -* configuration table to reflect the mode to be used. Modifying the config -* table is a workaround for now until we get some experience with how users -* are intending to use the hardware in its different configurations. For -* example, if the hardware is built with scatter-gather DMA but the user is -* intending to use only simple DMA, the user either needs to modify the config -* table as a workaround or rebuild the hardware with only simple DMA. -* -* This function makes use of internal resources that are shared between the -* Start, Stop, and SetOptions functions. So if one task might be setting device -* options while another is trying to start the device, the user is required to -* provide protection of this shared data (typically using a semaphore). -* -******************************************************************************/ -XStatus -XEmac_Start(XEmac * InstancePtr) -{ - u32 ControlReg; - XStatus Result; - - XASSERT_NONVOID(InstancePtr != NULL); - XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY); - - /* - * If it is already started, return a status indicating so - */ - if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) { - return XST_DEVICE_IS_STARTED; - } - - /* - * If not polled, enable interrupts - */ - if (!InstancePtr->IsPolled) { - /* - * Verify that the callbacks have been registered, then enable - * interrupts - */ - if (XEmac_mIsSgDma(InstancePtr)) { - if ((InstancePtr->SgRecvHandler == StubSgHandler) || - (InstancePtr->SgSendHandler == StubSgHandler)) { - return XST_NO_CALLBACK; - } - - /* Enable IPIF interrupts */ - XIIF_V123B_WRITE_DIER(InstancePtr->BaseAddress, - XEM_IPIF_DMA_DFT_MASK | - XIIF_V123B_ERROR_MASK); - XIIF_V123B_WRITE_IIER(InstancePtr->BaseAddress, - XEM_EIR_DFT_SG_MASK); - - /* Enable scatter-gather DMA interrupts */ - XDmaChannel_SetIntrEnable(&InstancePtr->RecvChannel, - XEM_DMA_SG_INTR_MASK); - XDmaChannel_SetIntrEnable(&InstancePtr->SendChannel, - XEM_DMA_SG_INTR_MASK); - } else { - if ((InstancePtr->FifoRecvHandler == StubFifoHandler) || - (InstancePtr->FifoSendHandler == StubFifoHandler)) { - return XST_NO_CALLBACK; - } - - /* Enable IPIF interrupts (used by simple DMA also) */ - XIIF_V123B_WRITE_DIER(InstancePtr->BaseAddress, - XEM_IPIF_FIFO_DFT_MASK | - XIIF_V123B_ERROR_MASK); - XIIF_V123B_WRITE_IIER(InstancePtr->BaseAddress, - XEM_EIR_DFT_FIFO_MASK); - } - - /* Enable the global IPIF interrupt output */ - XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress); - } - - /* - * Indicate that the device is started before we enable the transmitter - * or receiver. This needs to be done before because as soon as the - * receiver is enabled we may get an interrupt, and there are functions - * in the interrupt handling path that rely on the IsStarted flag. - */ - InstancePtr->IsStarted = XCOMPONENT_IS_STARTED; - - /* - * Enable the transmitter, and receiver (do a read/modify/write to preserve - * current settings). There is no critical section here since this register - * is not modified during interrupt context. - */ - ControlReg = XIo_In32(InstancePtr->BaseAddress + XEM_ECR_OFFSET); - ControlReg &= ~(XEM_ECR_XMIT_RESET_MASK | XEM_ECR_RECV_RESET_MASK); - ControlReg |= (XEM_ECR_XMIT_ENABLE_MASK | XEM_ECR_RECV_ENABLE_MASK); - - XIo_Out32(InstancePtr->BaseAddress + XEM_ECR_OFFSET, ControlReg); - - /* - * If configured with scatter-gather DMA and not polled, restart the - * DMA channels in case there are buffers ready to be sent or received into. - * The DMA SgStart function uses data that can be modified during interrupt - * context, so a critical section is required here. - */ - if ((XEmac_mIsSgDma(InstancePtr)) && (!InstancePtr->IsPolled)) { - XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress); - - /* - * The only error we care about is if the list has not yet been - * created, or on receive, if no buffer descriptors have been - * added yet (the list is empty). Other errors are benign at this point. - */ - Result = XDmaChannel_SgStart(&InstancePtr->RecvChannel); - if ((Result == XST_DMA_SG_NO_LIST) - || (Result == XST_DMA_SG_LIST_EMPTY)) { - XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress); - return Result; - } - - Result = XDmaChannel_SgStart(&InstancePtr->SendChannel); - if (Result == XST_DMA_SG_NO_LIST) { - XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress); - return Result; - } - - XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress); - } - - return XST_SUCCESS; -} - -/*****************************************************************************/ -/** -* -* Stop the Ethernet MAC as follows: -* - If the device is configured with scatter-gather DMA, stop the DMA -* channels (wait for acknowledgment of stop) -* - Disable the transmitter and receiver -* - Disable interrupts if not in polled mode (the higher layer software is -* responsible for disabling interrupts at the interrupt controller) -* -* The PHY is left enabled after a Stop is called. -* -* If the device is configured for scatter-gather DMA, the DMA engine stops at -* the next buffer descriptor in its list. The remaining descriptors in the list -* are not removed, so anything in the list will be transmitted or received when -* the device is restarted. The side effect of doing this is that the last -* buffer descriptor processed by the DMA engine before stopping may not be the -* last descriptor in the Ethernet frame. So when the device is restarted, a -* partial frame (i.e., a bad frame) may be transmitted/received. This is only a -* concern if a frame can span multiple buffer descriptors, which is dependent -* on the size of the network buffers. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* -* @return -* -* - XST_SUCCESS if the device was stopped successfully -* - XST_DEVICE_IS_STOPPED if the device is already stopped -* -* @note -* -* This function makes use of internal resources that are shared between the -* Start, Stop, and SetOptions functions. So if one task might be setting device -* options while another is trying to start the device, the user is required to -* provide protection of this shared data (typically using a semaphore). -* -******************************************************************************/ -XStatus -XEmac_Stop(XEmac * InstancePtr) -{ - u32 ControlReg; - - XASSERT_NONVOID(InstancePtr != NULL); - XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY); - - /* - * If the device is already stopped, do nothing but return a status - * indicating so - */ - if (InstancePtr->IsStarted != XCOMPONENT_IS_STARTED) { - return XST_DEVICE_IS_STOPPED; - } - - /* - * If configured for scatter-gather DMA, stop the DMA channels. Ignore - * the XST_DMA_SG_IS_STOPPED return code. There is a critical section - * here between SgStart and SgStop, and SgStart can be called in interrupt - * context, so disable interrupts while calling SgStop. - */ - if (XEmac_mIsSgDma(InstancePtr)) { - XBufDescriptor *BdTemp; /* temporary descriptor pointer */ - - XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress); - - (void) XDmaChannel_SgStop(&InstancePtr->SendChannel, &BdTemp); - (void) XDmaChannel_SgStop(&InstancePtr->RecvChannel, &BdTemp); - - XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress); - } - - /* - * Disable the transmitter and receiver. There is no critical section - * here since this register is not modified during interrupt context. - */ - ControlReg = XIo_In32(InstancePtr->BaseAddress + XEM_ECR_OFFSET); - ControlReg &= ~(XEM_ECR_XMIT_ENABLE_MASK | XEM_ECR_RECV_ENABLE_MASK); - XIo_Out32(InstancePtr->BaseAddress + XEM_ECR_OFFSET, ControlReg); - - /* - * If not in polled mode, disable interrupts for IPIF (includes MAC and - * DMAs) - */ - if (!InstancePtr->IsPolled) { - XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress); - } - - InstancePtr->IsStarted = 0; - - return XST_SUCCESS; -} - -/*****************************************************************************/ -/** -* -* Reset the Ethernet MAC. This is a graceful reset in that the device is stopped -* first. Resets the DMA channels, the FIFOs, the transmitter, and the receiver. -* The PHY is not reset. Any frames in the scatter-gather descriptor lists will -* remain in the lists. The side effect of doing this is that after a reset and -* following a restart of the device, frames that were in the list before the -* reset may be transmitted or received. Reset must only be called after the -* driver has been initialized. -* -* The driver is also taken out of polled mode if polled mode was set. The user -* is responsbile for re-configuring the driver into polled mode after the -* reset if desired. -* -* The configuration after this reset is as follows: -* - Half duplex -* - Disabled transmitter and receiver -* - Enabled PHY (the PHY is not reset) -* - MAC transmitter does pad insertion, FCS insertion, and source address -* overwrite. -* - MAC receiver does not strip padding or FCS -* - Interframe Gap as recommended by IEEE Std. 802.3 (96 bit times) -* - Unicast addressing enabled -* - Broadcast addressing enabled -* - Multicast addressing disabled (addresses are preserved) -* - Promiscuous addressing disabled -* - Default packet threshold and packet wait bound register values for -* scatter-gather DMA operation -* - MAC address of all zeros -* - Non-polled mode -* -* The upper layer software is responsible for re-configuring (if necessary) -* and restarting the MAC after the reset. Note that the PHY is not reset. PHY -* control is left to the upper layer software. Note also that driver statistics -* are not cleared on reset. It is up to the upper layer software to clear the -* statistics if needed. -* -* When a reset is required due to an internal error, the driver notifies the -* upper layer software of this need through the ErrorHandler callback and -* specific status codes. The upper layer software is responsible for calling -* this Reset function and then re-configuring the device. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* -* @return -* -* None. -* -* @note -* -* None. -* -* @internal -* -* The reset is accomplished by setting the IPIF reset register. This takes -* care of resetting all hardware blocks, including the MAC. -* -******************************************************************************/ -void -XEmac_Reset(XEmac * InstancePtr) -{ - XASSERT_VOID(InstancePtr != NULL); - XASSERT_VOID(InstancePtr->IsReady == XCOMPONENT_IS_READY); - - /* - * Stop the device first - */ - (void) XEmac_Stop(InstancePtr); - - /* - * Take the driver out of polled mode - */ - InstancePtr->IsPolled = FALSE; - - /* - * Reset the entire IPIF at once. If we choose someday to reset each - * hardware block separately, the reset should occur in the direction of - * data flow. For example, for the send direction the reset order is DMA - * first, then FIFO, then the MAC transmitter. - */ - XIIF_V123B_RESET(InstancePtr->BaseAddress); - - if (XEmac_mIsSgDma(InstancePtr)) { - /* - * After reset, configure the scatter-gather DMA packet threshold and - * packet wait bound registers to default values. Ignore the return - * values of these functions since they only return error if the device - * is not stopped. - */ - (void) XEmac_SetPktThreshold(InstancePtr, XEM_SEND, - XEM_SGDMA_DFT_THRESHOLD); - (void) XEmac_SetPktThreshold(InstancePtr, XEM_RECV, - XEM_SGDMA_DFT_THRESHOLD); - (void) XEmac_SetPktWaitBound(InstancePtr, XEM_SEND, - XEM_SGDMA_DFT_WAITBOUND); - (void) XEmac_SetPktWaitBound(InstancePtr, XEM_RECV, - XEM_SGDMA_DFT_WAITBOUND); - } -} - -/*****************************************************************************/ -/** -* -* Set the MAC address for this driver/device. The address is a 48-bit value. -* The device must be stopped before calling this function. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* @param AddressPtr is a pointer to a 6-byte MAC address. -* -* @return -* -* - XST_SUCCESS if the MAC address was set successfully -* - XST_DEVICE_IS_STARTED if the device has not yet been stopped -* -* @note -* -* None. -* -******************************************************************************/ -XStatus -XEmac_SetMacAddress(XEmac * InstancePtr, u8 * AddressPtr) -{ - u32 MacAddr = 0; - - XASSERT_NONVOID(InstancePtr != NULL); - XASSERT_NONVOID(AddressPtr != NULL); - XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY); - - /* - * The device must be stopped before setting the MAC address - */ - if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) { - return XST_DEVICE_IS_STARTED; - } - - /* - * Set the device station address high and low registers - */ - MacAddr = (AddressPtr[0] << 8) | AddressPtr[1]; - XIo_Out32(InstancePtr->BaseAddress + XEM_SAH_OFFSET, MacAddr); - - MacAddr = (AddressPtr[2] << 24) | (AddressPtr[3] << 16) | - (AddressPtr[4] << 8) | AddressPtr[5]; - - XIo_Out32(InstancePtr->BaseAddress + XEM_SAL_OFFSET, MacAddr); - - return XST_SUCCESS; -} - -/*****************************************************************************/ -/** -* -* Get the MAC address for this driver/device. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* @param BufferPtr is an output parameter, and is a pointer to a buffer into -* which the current MAC address will be copied. The buffer must be at -* least 6 bytes. -* -* @return -* -* None. -* -* @note -* -* None. -* -******************************************************************************/ -void -XEmac_GetMacAddress(XEmac * InstancePtr, u8 * BufferPtr) -{ - u32 MacAddrHi; - u32 MacAddrLo; - - XASSERT_VOID(InstancePtr != NULL); - XASSERT_VOID(BufferPtr != NULL); - XASSERT_VOID(InstancePtr->IsReady == XCOMPONENT_IS_READY); - - MacAddrHi = XIo_In32(InstancePtr->BaseAddress + XEM_SAH_OFFSET); - MacAddrLo = XIo_In32(InstancePtr->BaseAddress + XEM_SAL_OFFSET); - - BufferPtr[0] = (u8) (MacAddrHi >> 8); - BufferPtr[1] = (u8) MacAddrHi; - BufferPtr[2] = (u8) (MacAddrLo >> 24); - BufferPtr[3] = (u8) (MacAddrLo >> 16); - BufferPtr[4] = (u8) (MacAddrLo >> 8); - BufferPtr[5] = (u8) MacAddrLo; -} - -/******************************************************************************/ -/** -* -* Configure DMA capabilities. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* -* @return -* -* - XST_SUCCESS if successful initialization of DMA -* -* @note -* -* None. -* -******************************************************************************/ -static XStatus -ConfigureDma(XEmac * InstancePtr) -{ - XStatus Result; - - /* - * Initialize the DMA channels with their base addresses. We assume - * scatter-gather DMA is the only possible configuration. Descriptor space - * will need to be set later by the upper layer. - */ - Result = XDmaChannel_Initialize(&InstancePtr->RecvChannel, - InstancePtr->BaseAddress + - XEM_DMA_RECV_OFFSET); - if (Result != XST_SUCCESS) { - return Result; - } - - Result = XDmaChannel_Initialize(&InstancePtr->SendChannel, - InstancePtr->BaseAddress + - XEM_DMA_SEND_OFFSET); - - return Result; -} - -/******************************************************************************/ -/** -* -* Configure the send and receive FIFO components with their base addresses -* and interrupt masks. Currently the base addresses are defined constants. -* -* @param InstancePtr is a pointer to the XEmac instance to be worked on. -* -* @return -* -* XST_SUCCESS if successful initialization of the packet FIFOs -* -* @note -* -* None. -* -******************************************************************************/ -static XStatus -ConfigureFifo(XEmac * InstancePtr) -{ - XStatus Result; - - /* - * Return status from the packet FIFOs initialization is ignored since - * they always return success. - */ - Result = XPacketFifoV100b_Initialize(&InstancePtr->RecvFifo, - InstancePtr->BaseAddress + - XEM_PFIFO_RXREG_OFFSET, - InstancePtr->BaseAddress + - XEM_PFIFO_RXDATA_OFFSET); - if (Result != XST_SUCCESS) { - return Result; - } - - Result = XPacketFifoV100b_Initialize(&InstancePtr->SendFifo, - InstancePtr->BaseAddress + - XEM_PFIFO_TXREG_OFFSET, - InstancePtr->BaseAddress + - XEM_PFIFO_TXDATA_OFFSET); - return Result; -} - -/******************************************************************************/ -/** -* -* This is a stub for the scatter-gather send and recv callbacks. The stub -* is here in case the upper layers forget to set the handlers. -* -* @param CallBackRef is a pointer to the upper layer callback reference -* @param BdPtr is a pointer to the first buffer descriptor in a list -* @param NumBds is the number of descriptors in the list. -* -* @return -* -* None. -* -* @note -* -* None. -* -******************************************************************************/ -static void -StubSgHandler(void *CallBackRef, XBufDescriptor * BdPtr, u32 NumBds) -{ - XASSERT_VOID_ALWAYS(); -} - -/******************************************************************************/ -/** -* -* This is a stub for the non-DMA send and recv callbacks. The stub is here in -* case the upper layers forget to set the handlers. -* -* @param CallBackRef is a pointer to the upper layer callback reference -* -* @return -* -* None. -* -* @note -* -* None. -* -******************************************************************************/ -static void -StubFifoHandler(void *CallBackRef) -{ - XASSERT_VOID_ALWAYS(); -} - -/******************************************************************************/ -/** -* -* This is a stub for the asynchronous error callback. The stub is here in -* case the upper layers forget to set the handler. -* -* @param CallBackRef is a pointer to the upper layer callback reference -* @param ErrorCode is the Xilinx error code, indicating the cause of the error -* -* @return -* -* None. -* -* @note -* -* None. -* -******************************************************************************/ -static void -StubErrorHandler(void *CallBackRef, XStatus ErrorCode) -{ - XASSERT_VOID_ALWAYS(); -} - -/*****************************************************************************/ -/** -* -* Lookup the device configuration based on the unique device ID. The table -* EmacConfigTable contains the configuration info for each device in the system. -* -* @param DeviceId is the unique device ID of the device being looked up. -* -* @return -* -* A pointer to the configuration table entry corresponding to the given -* device ID, or NULL if no match is found. -* -* @note -* -* None. -* -******************************************************************************/ -XEmac_Config * -XEmac_LookupConfig(u16 DeviceId) -{ - XEmac_Config *CfgPtr = NULL; - int i; - - for (i = 0; i < XPAR_XEMAC_NUM_INSTANCES; i++) { - if (XEmac_ConfigTable[i].DeviceId == DeviceId) { - CfgPtr = &XEmac_ConfigTable[i]; - break; - } - } - - return CfgPtr; -} |