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author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2016-06-27 13:46:01 +0200 |
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committer | Dominik Sliwa <dominik.sliwa@toradex.com> | 2016-06-27 13:46:01 +0200 |
commit | 44f7d1e90427b2e2cdd69cd9a9cc094a02c5ea56 (patch) | |
tree | 3c8e786b1774f828da3ba788daeb37f560673cff /drivers/fsl_dmamux.c |
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commitk20_tester: Initial commit
Diffstat (limited to 'drivers/fsl_dmamux.c')
-rw-r--r-- | drivers/fsl_dmamux.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/fsl_dmamux.c b/drivers/fsl_dmamux.c new file mode 100644 index 0000000..a288b9f --- /dev/null +++ b/drivers/fsl_dmamux.c @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "fsl_dmamux.h" + +/******************************************************************************* + * Definitions + ******************************************************************************/ + +/******************************************************************************* + * Prototypes + ******************************************************************************/ + +/*! + * @brief Get instance number for DMAMUX. + * + * @param base DMAMUX peripheral base address. + */ +static uint32_t DMAMUX_GetInstance(DMAMUX_Type *base); + +/******************************************************************************* + * Variables + ******************************************************************************/ + +/*! @brief Array to map DMAMUX instance number to base pointer. */ +static DMAMUX_Type *const s_dmamuxBases[] = DMAMUX_BASE_PTRS; + +/*! @brief Array to map DMAMUX instance number to clock name. */ +static const clock_ip_name_t s_dmamuxClockName[] = DMAMUX_CLOCKS; + +/******************************************************************************* + * Code + ******************************************************************************/ +static uint32_t DMAMUX_GetInstance(DMAMUX_Type *base) +{ + uint32_t instance; + + /* Find the instance index from base address mappings. */ + for (instance = 0; instance < FSL_FEATURE_SOC_DMAMUX_COUNT; instance++) + { + if (s_dmamuxBases[instance] == base) + { + break; + } + } + + assert(instance < FSL_FEATURE_SOC_DMAMUX_COUNT); + + return instance; +} + +void DMAMUX_Init(DMAMUX_Type *base) +{ + CLOCK_EnableClock(s_dmamuxClockName[DMAMUX_GetInstance(base)]); +} + +void DMAMUX_Deinit(DMAMUX_Type *base) +{ + CLOCK_DisableClock(s_dmamuxClockName[DMAMUX_GetInstance(base)]); +} |