fsl_dmamux.c

00001 /*
00002  * Copyright (c) 2015, Freescale Semiconductor, Inc.
00003  * Copyright 2016-2017 NXP
00004  * All rights reserved.
00005  *
00006  * SPDX-License-Identifier: BSD-3-Clause
00007  */
00008 
00009 #include "fsl_dmamux.h"
00010 #include "fsl_clock.h "
00011 
00012 /*******************************************************************************
00013  * Definitions
00014  ******************************************************************************/
00015 
00016 /* Component ID definition, used by tools. */
00017 #ifndef FSL_COMPONENT_ID
00018 #define FSL_COMPONENT_ID "platform.drivers.dmamux"
00019 #endif
00020 
00021 /*******************************************************************************
00022  * Prototypes
00023  ******************************************************************************/
00024 
00025 /*!
00026  * @brief Get instance number for DMAMUX.
00027  *
00028  * @param base DMAMUX peripheral base address.
00029  */
00030 static uint32_t DMAMUX_GetInstance(DMAMUX_Type *base);
00031 
00032 /*******************************************************************************
00033  * Variables
00034  ******************************************************************************/
00035 
00036 /*! @brief Array to map DMAMUX instance number to base pointer. */
00037 static DMAMUX_Type *const s_dmamuxBases[] = DMAMUX_BASE_PTRS;
00038 
00039 #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
00040 /*! @brief Array to map DMAMUX instance number to clock name. */
00041 static const clock_ip_name_t s_dmamuxClockName[] = DMAMUX_CLOCKS;
00042 #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
00043 
00044 /*******************************************************************************
00045  * Code
00046  ******************************************************************************/
00047 static uint32_t DMAMUX_GetInstance(DMAMUX_Type *base)
00048 {
00049     uint32_t instance;
00050 
00051     /* Find the instance index from base address mappings. */
00052     for (instance = 0; instance < ARRAY_SIZE(s_dmamuxBases); instance++)
00053     {
00054         if (s_dmamuxBases[instance] == base)
00055         {
00056             break;
00057         }
00058     }
00059 
00060     assert(instance < ARRAY_SIZE(s_dmamuxBases));
00061 
00062     return instance;
00063 }
00064 
00065 /*!
00066  * brief Initializes the DMAMUX peripheral.
00067  *
00068  * This function ungates the DMAMUX clock.
00069  *
00070  * param base DMAMUX peripheral base address.
00071  *
00072  */
00073 void DMAMUX_Init(DMAMUX_Type *base)
00074 {
00075 #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
00076     CLOCK_EnableClock(s_dmamuxClockName[DMAMUX_GetInstance(base)]);
00077 #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
00078 }
00079 
00080 /*!
00081  * brief Deinitializes the DMAMUX peripheral.
00082  *
00083  * This function gates the DMAMUX clock.
00084  *
00085  * param base DMAMUX peripheral base address.
00086  */
00087 void DMAMUX_Deinit(DMAMUX_Type *base)
00088 {
00089 #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
00090     CLOCK_DisableClock(s_dmamuxClockName[DMAMUX_GetInstance(base)]);
00091 #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
00092 }