2c8f92039d
Added initial support Xilinx Embedded Software. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
157 lines
5.5 KiB
C
Executable file
157 lines
5.5 KiB
C
Executable file
/******************************************************************************
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*
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* Copyright (C) 2002 - 2014 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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******************************************************************************/
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/****************************************************************************/
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/**
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*
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* @file xuartns550_sinit.c
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*
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* The implementation of the XUartNs550 component's static initialzation
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* functionality.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- ---- -------- -----------------------------------------------
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* 1.01a jvb 10/13/05 First release
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* 1.11a sv 03/20/07 Updated to use the new coding guidelines.
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* 2.00a ktn 10/20/09 Updated to use HAL Processor APIs.
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*
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* </pre>
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*
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*****************************************************************************/
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/***************************** Include Files ********************************/
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#include "xstatus.h"
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#include "xparameters.h"
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#include "xuartns550_i.h"
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/************************** Constant Definitions ****************************/
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#ifndef XPAR_DEFAULT_BAUD_RATE
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#define XPAR_DEFAULT_BAUD_RATE 19200
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#endif
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/**************************** Type Definitions ******************************/
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/***************** Macros (Inline Functions) Definitions ********************/
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/************************** Variable Definitions ****************************/
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/************************** Function Prototypes *****************************/
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/****************************************************************************/
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/**
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*
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* Looks up the device configuration based on the unique device ID. A table
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* contains the configuration info for each device in the system.
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*
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* @param DeviceId contains the ID of the device to look up the
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* configuration for.
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*
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* @return A pointer to the configuration found or NULL if the specified
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* device ID was not found.
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*
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* @note None.
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*
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******************************************************************************/
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XUartNs550_Config *XUartNs550_LookupConfig(u16 DeviceId)
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{
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XUartNs550_Config *CfgPtr = NULL;
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u32 Index;
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for (Index=0; Index < XPAR_XUARTNS550_NUM_INSTANCES; Index++) {
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if (XUartNs550_ConfigTable[Index].DeviceId == DeviceId) {
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CfgPtr = &XUartNs550_ConfigTable[Index];
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break;
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}
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}
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return CfgPtr;
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}
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/****************************************************************************/
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/**
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*
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* Initializes a specific XUartNs550 instance such that it is ready to be used.
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* The data format of the device is setup for 8 data bits, 1 stop bit, and no
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* parity by default. The baud rate is set to a default value specified by
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* XPAR_DEFAULT_BAUD_RATE if the symbol is defined, otherwise it is set to
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* 19.2K baud. If the device has FIFOs (16550), they are enabled and the a
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* receive FIFO threshold is set for 8 bytes. The default operating mode of the
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* driver is polled mode.
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*
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* @param InstancePtr is a pointer to the XUartNs550 instance .
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* @param DeviceId is the unique id of the device controlled by this
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* XUartNs550 instance. Passing in a device id associates the
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* generic XUartNs550 instance to a specific device, as chosen
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* by the caller or application developer.
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*
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* @return
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*
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* - XST_SUCCESS if initialization was successful
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* - XST_DEVICE_NOT_FOUND if the device ID could not be found in
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* the configuration table
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* - XST_UART_BAUD_ERROR if the baud rate is not possible because
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* the input clock frequency is not divisible with an acceptable
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* amount of error
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*
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* @note None.
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*
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*****************************************************************************/
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int XUartNs550_Initialize(XUartNs550 *InstancePtr, u16 DeviceId)
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{
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XUartNs550_Config *ConfigPtr;
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/*
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* Assert validates the input arguments
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*/
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Xil_AssertNonvoid(InstancePtr != NULL);
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/*
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* Lookup the device configuration in the temporary CROM table. Use this
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* configuration info down below when initializing this component
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*/
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ConfigPtr = XUartNs550_LookupConfig(DeviceId);
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if (ConfigPtr == (XUartNs550_Config *)NULL) {
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return XST_DEVICE_NOT_FOUND;
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}
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ConfigPtr->DefaultBaudRate = XPAR_DEFAULT_BAUD_RATE;
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return XUartNs550_CfgInitialize(InstancePtr, ConfigPtr,
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ConfigPtr->BaseAddress);
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}
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