/******************************************************************************
*
* Copyright (C) 2010 - 2014 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,
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*
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* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/****************************************************************************/
/**
*
* @file xscutimer.h
*
* The timer driver supports the Cortex A9 private timer.
*
* The timer driver supports the following features:
* - Normal mode and Auto reload mode
* - Interrupts (Interrupt handler is not provided in this driver. Application
* has to register it's own handler)
*
* <b> Initialization and Configuration </b>
*
* The device driver enables higher layer software (e.g., an application) to
* communicate with the Timer.
*
* XScuTimer_CfgInitialize() API is used to initialize the Timer. The
* user needs to first call the XScuTimer_LookupConfig() API which returns
* the Configuration structure pointer which is passed as a parameter to
* the XScuTimer_CfgInitialize() API.
*
* <b> Interrupts </b>
*
* The Timer hardware supports interrupts.
*
* This driver does not provide a Interrupt Service Routine (ISR) for the device.
* It is the responsibility of the application to provide one if needed. Refer to
* the interrupt example provided with this driver for details on using the
* Timer in interrupt mode.
*
* <b> Virtual Memory </b>
*
* This driver supports Virtual Memory. The RTOS is responsible for calculating
* the correct device base address in Virtual Memory space.
*
* <b> Threads </b>
*
* This driver is not thread safe. Any needs for threads or thread mutual
* exclusion must be satisfied by the layer above this driver.
*
* <b> Asserts </b>
*
* Asserts are used within all Xilinx drivers to enforce constraints on argument
* values. Asserts can be turned off on a system-wide basis by defining, at
* compile time, the NDEBUG identifier. By default, asserts are turned on and it
* is recommended that users leave asserts on during development.
*
* <b> Building the driver </b>
*
* The XScuTimer driver is composed of several source files. This allows the user
* to build and link only those parts of the driver that are necessary.
*
* <br><br>
*
* NOTE:
* The timer is not a part of the snoop control unit as indicated by the
* prefix "scu" in the name of the driver.
* It is an independent module in APU.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- --- -------- ---------------------------------------------
* 1.00a nm 03/10/10 First release
* 1.02a sg 07/17/12 Included xil_assert.h for CR 667947. This is an issue
* when the xstatus.h in the common driver overwrites
* the xstatus.h of the standalone BSP during the
* libgen.
* </pre>
*
******************************************************************************/
#ifndef XSCUTIMER_H /* prevent circular inclusions */
#define XSCUTIMER_H /* by using protection macros */
/***************************** Include Files *********************************/
#include "xstatus.h"
#include "xscutimer_hw.h"
#ifdef __cplusplus
extern "C" {
#endif
/************************** Constant Definitions *****************************/
/**************************** Type Definitions *******************************/
/**
* This typedef contains configuration information for the device.
*/
typedef struct {
u16 DeviceId; /**< Unique ID of device */
u32 BaseAddr; /**< Base address of the device */
} XScuTimer_Config;
/**
* The XScuTimer driver instance data. The user is required to allocate a
* variable of this type for every timer device in the system.
* A pointer to a variable of this type is then passed to the driver API
* functions.
*/
typedef struct {
XScuTimer_Config Config; /**< Hardware Configuration */
u32 IsReady; /**< Device is initialized and ready */
u32 IsStarted; /**< Device timer is running */
} XScuTimer;
/***************** Macros (Inline Functions) Definitions *********************/
/****************************************************************************/
/**
*
* Check if the timer has expired.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return
* - TRUE if the timer has expired.
* - FALSE if the timer has not expired.
*
* @note C-style signature:
* int XScuTimer_IsExpired(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_IsExpired(InstancePtr) \
((XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_ISR_OFFSET) & \
XSCUTIMER_ISR_EVENT_FLAG_MASK) == \
XSCUTIMER_ISR_EVENT_FLAG_MASK)
/****************************************************************************/
/**
*
* Re-start the timer. This macro will read the timer load register
* and writes the same value to load register to update the counter register.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_RestartTimer(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_RestartTimer(InstancePtr) \
XScuTimer_LoadTimer((InstancePtr), \
XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_LOAD_OFFSET))
/****************************************************************************/
/**
*
* Write to the timer load register. This will also update the
* timer counter register with the new value. This macro can be used to
* change the time-out value.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
* @param Value is the count to be loaded in to the load register.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_LoadTimer(XScuTimer *InstancePtr, u32 Value)
*
******************************************************************************/
#define XScuTimer_LoadTimer(InstancePtr, Value) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_LOAD_OFFSET, (Value))
/****************************************************************************/
/**
*
* Returns the current timer counter register value. It can be called at any
* time.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return Contents of the timer counter register.
*
* @note C-style signature:
u32 XScuTimer_GetCounterValue(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_GetCounterValue(InstancePtr) \
XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_COUNTER_OFFSET)
/****************************************************************************/
/**
*
* Enable auto-reload mode.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_EnableAutoReload(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_EnableAutoReload(InstancePtr) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET, \
(XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET) | \
XSCUTIMER_CONTROL_AUTO_RELOAD_MASK))
/****************************************************************************/
/**
*
* Disable auto-reload mode.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_DisableAutoReload(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_DisableAutoReload(InstancePtr) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET, \
(XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET) & \
~(XSCUTIMER_CONTROL_AUTO_RELOAD_MASK)))
/****************************************************************************/
/**
*
* Enable the Timer interrupt.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_EnableInterrupt(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_EnableInterrupt(InstancePtr) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET, \
(XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET) | \
XSCUTIMER_CONTROL_IRQ_ENABLE_MASK))
/****************************************************************************/
/**
*
* Disable the Timer interrupt.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_DisableInterrupt(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_DisableInterrupt(InstancePtr) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET, \
(XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_CONTROL_OFFSET) & \
~(XSCUTIMER_CONTROL_IRQ_ENABLE_MASK)))
/*****************************************************************************/
/**
*
* This function reads the interrupt status.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_GetInterruptStatus(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_GetInterruptStatus(InstancePtr) \
XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_ISR_OFFSET)
/*****************************************************************************/
/**
*
* This function clears the interrupt status.
*
* @param InstancePtr is a pointer to the XScuTimer instance.
*
* @return None.
*
* @note C-style signature:
* void XScuTimer_ClearInterruptStatus(XScuTimer *InstancePtr)
*
******************************************************************************/
#define XScuTimer_ClearInterruptStatus(InstancePtr) \
XScuTimer_WriteReg((InstancePtr)->Config.BaseAddr, \
XSCUTIMER_ISR_OFFSET, XSCUTIMER_ISR_EVENT_FLAG_MASK)
/************************** Function Prototypes ******************************/
/*
* Lookup configuration in xscutimer_sinit.c
*/
XScuTimer_Config *XScuTimer_LookupConfig(u16 DeviceId);
/*
* Selftest function in xscutimer_selftest.c
*/
s32 XScuTimer_SelfTest(XScuTimer *InstancePtr);
/*
* Interface functions in xscutimer.c
*/
s32 XScuTimer_CfgInitialize(XScuTimer *InstancePtr,
XScuTimer_Config *ConfigPtr, u32 EffectiveAddress);
void XScuTimer_Start(XScuTimer *InstancePtr);
void XScuTimer_Stop(XScuTimer *InstancePtr);
void XScuTimer_SetPrescaler(XScuTimer *InstancePtr, u8 PrescalerValue);
u8 XScuTimer_GetPrescaler(XScuTimer *InstancePtr);
#ifdef __cplusplus
}
#endif
#endif /* end of protection macro */