diff options
Diffstat (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.c')
| -rw-r--r-- | os/hal/platforms/STM32L1xx/stm32_dma.c | 468 |
1 files changed, 0 insertions, 468 deletions
diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.c b/os/hal/platforms/STM32L1xx/stm32_dma.c deleted file mode 100644 index 2232df448..000000000 --- a/os/hal/platforms/STM32L1xx/stm32_dma.c +++ /dev/null @@ -1,468 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
- 2011 Giovanni Di Sirio.
-
- This file is part of ChibiOS/RT.
-
- ChibiOS/RT 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 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/RT is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/**
- * @file stm32_dma.c
- * @brief STM32 DMA helper driver code.
- *
- * @addtogroup STM32_DMA
- * @details DMA sharing helper driver. In the STM32 the DMA channels are a
- * shared resource, this driver allows to allocate and free DMA
- * channels at runtime in order to allow all the other device
- * drivers to coordinate the access to the resource.
- * @note The DMA ISR handlers are all declared into this module because
- * sharing, the various device drivers can associate a callback to
- * IRSs when allocating channels.
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if defined(STM32_DMA_REQUIRED) || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/**
- * @brief DMA ISR redirector type.
- */
-typedef struct {
- stm32_dmaisr_t dmaisrfunc;
- void *dmaisrparam;
-} dma_isr_redir_t;
-
-static uint32_t dmamsk1;
-static dma_isr_redir_t dma1[7];
-
-#if STM32_HAS_DMA2
-static uint32_t dmamsk2;
-static dma_isr_redir_t dma2[5];
-#endif
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/**
- * @brief DMA1 channel 1 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch1_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_1 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_1);
- if (dma1[0].dmaisrfunc)
- dma1[0].dmaisrfunc(dma1[0].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 2 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch2_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_2 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_2);
- if (dma1[1].dmaisrfunc)
- dma1[1].dmaisrfunc(dma1[1].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 3 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch3_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_3 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_3);
- if (dma1[2].dmaisrfunc)
- dma1[2].dmaisrfunc(dma1[2].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 4 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch4_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_4 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_4);
- if (dma1[3].dmaisrfunc)
- dma1[3].dmaisrfunc(dma1[3].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 5 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch5_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_5 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_5);
- if (dma1[4].dmaisrfunc)
- dma1[4].dmaisrfunc(dma1[4].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 6 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch6_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_6 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_6);
- if (dma1[5].dmaisrfunc)
- dma1[5].dmaisrfunc(dma1[5].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA1 channel 7 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA1_Ch7_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA1->ISR >> (STM32_DMA_CHANNEL_7 * 4);
- dmaClearChannel(STM32_DMA1, STM32_DMA_CHANNEL_7);
- if (dma1[6].dmaisrfunc)
- dma1[6].dmaisrfunc(dma1[6].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-#if STM32_HAS_DMA2 || defined(__DOXYGEN__)
-/**
- * @brief DMA2 channel 1 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch1_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_1 * 4);
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_1);
- if (dma2[0].dmaisrfunc)
- dma2[0].dmaisrfunc(dma2[0].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA2 channel 2 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch2_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_2 * 4);
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_2);
- if (dma2[1].dmaisrfunc)
- dma2[1].dmaisrfunc(dma2[1].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA2 channel 3 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch3_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_3 * 4);
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_3);
- if (dma2[2].dmaisrfunc)
- dma2[2].dmaisrfunc(dma2[2].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-#if defined(STM32F10X_CL) || defined(__DOXYGEN__)
-/**
- * @brief DMA2 channel 4 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch4_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_4 * 4);
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_4);
- if (dma2[3].dmaisrfunc)
- dma2[3].dmaisrfunc(dma2[3].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-/**
- * @brief DMA2 channel 5 shared interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch5_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_5 * 4);
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_5);
- if (dma2[4].dmaisrfunc)
- dma2[4].dmaisrfunc(dma2[4].dmaisrparam, isr);
-
- CH_IRQ_EPILOGUE();
-}
-
-#else /* !STM32F10X_CL */
-/**
- * @brief DMA2 channels 4 and 5 shared interrupt handler.
- * @note This IRQ is shared between DMA2 channels 4 and 5 so it is a
- * bit less efficient because an extra check.
- *
- * @isr
- */
-CH_IRQ_HANDLER(DMA2_Ch4_5_IRQHandler) {
- uint32_t isr;
-
- CH_IRQ_PROLOGUE();
-
- /* Check on channel 4.*/
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_5 * 4);
- if (isr & DMA_ISR_GIF1) {
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_5);
- if (dma2[3].dmaisrfunc)
- dma2[3].dmaisrfunc(dma2[3].dmaisrparam, isr);
- }
-
- /* Check on channel 5.*/
- isr = STM32_DMA2->ISR >> (STM32_DMA_CHANNEL_4 * 4);
- if (isr & DMA_ISR_GIF1) {
- dmaClearChannel(STM32_DMA2, STM32_DMA_CHANNEL_5);
- if (dma2[4].dmaisrfunc)
- dma2[4].dmaisrfunc(dma2[4].dmaisrparam, isr);
- }
-
- CH_IRQ_EPILOGUE();
-}
-#endif /* !STM32F10X_CL */
-#endif /* STM32_HAS_DMA2 */
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief STM32 DMA helper initialization.
- *
- * @init
- */
-void dmaInit(void) {
- int i;
-
- dmamsk1 = 0;
- for (i = STM32_DMA_CHANNEL_7; i >= STM32_DMA_CHANNEL_1; i--) {
- dmaDisableChannel(STM32_DMA1, i);
- dma1[i].dmaisrfunc = NULL;
- }
- STM32_DMA1->IFCR = 0xFFFFFFFF;
-#if STM32_HAS_DMA2
- dmamsk2 = 0;
- for (i = STM32_DMA_CHANNEL_5; i >= STM32_DMA_CHANNEL_1; i--) {
- dmaDisableChannel(STM32_DMA2, i);
- dma2[i].dmaisrfunc = NULL;
- }
- STM32_DMA1->IFCR = 0xFFFFFFFF;
-#endif
-}
-
-/**
- * @brief Allocates a DMA channel.
- * @details The channel is allocated and, if required, the DMA clock enabled.
- * Trying to allocate a channel already allocated is an illegal
- * operation and is trapped if assertions are enabled.
- * @pre The channel must not be already in use.
- * @post The channel is allocated and the default ISR handler redirected
- * to the specified function.
- * @post The channel must be freed using @p dmaRelease() before it can
- * be reused with another peripheral.
- * @note This function can be invoked in both ISR or thread context.
- *
- * @param[in] dma DMA controller id
- * @param[in] channel requested channel id
- * @param[in] func handling function pointer, can be @p NULL
- * @param[in] param a parameter to be passed to the handling function
- * @return The operation status.
- * @retval FALSE operation successfully allocated.
- * @retval TRUE the channel was already in use.
- *
- * @special
- */
-void dmaAllocate(uint32_t dma, uint32_t channel,
- stm32_dmaisr_t func, void *param) {
-
- chDbgCheck(func != NULL, "dmaAllocate");
-
-#if STM32_HAS_DMA2
- switch (dma) {
- case STM32_DMA1_ID:
-#else
- (void)dma;
-#endif
- /* Check if the channel is already taken.*/
- chDbgAssert((dmamsk1 & (1 << channel)) == 0,
- "dmaAllocate(), #1", "already allocated");
-
- /* If the DMA unit was idle then the clock is enabled.*/
- if (dmamsk1 == 0) {
- RCC->AHBENR |= RCC_AHBENR_DMA1EN;
- DMA1->IFCR = 0x0FFFFFFF;
- }
-
- dmamsk1 |= 1 << channel;
- dma1[channel].dmaisrfunc = func;
- dma1[channel].dmaisrparam = param;
-#if STM32_HAS_DMA2
- break;
- case STM32_DMA2_ID:
- /* Check if the channel is already taken.*/
- chDbgAssert((dmamsk2 & (1 << channel)) == 0,
- "dmaAllocate(), #2", "already allocated");
-
- /* If the DMA unit was idle then the clock is enabled.*/
- if (dmamsk2 == 0) {
- RCC->AHBENR |= RCC_AHBENR_DMA2EN;
- DMA2->IFCR = 0x0FFFFFFF;
- }
-
- dmamsk2 |= 1 << channel;
- dma2[channel].dmaisrfunc = func;
- dma2[channel].dmaisrparam = param;
- break;
- }
-#endif
-}
-
-/**
- * @brief Releases a DMA channel.
- * @details The channel is freed and, if required, the DMA clock disabled.
- * Trying to release a unallocated channel is an illegal operation
- * and is trapped if assertions are enabled.
- * @pre The channel must have been allocated using @p dmaRequest().
- * @post The channel is again available.
- * @note This function can be invoked in both ISR or thread context.
- *
- * @param[in] dma DMA controller id
- * @param[in] channel requested channel id
- *
- * @special
- */
-void dmaRelease(uint32_t dma, uint32_t channel) {
-
-#if STM32_HAS_DMA2
- switch (dma) {
- case STM32_DMA1_ID:
-#else
- (void)dma;
-#endif
- /* Check if the channel is not taken.*/
- chDbgAssert((dmamsk1 & (1 << channel)) != 0,
- "dmaRelease(), #1", "not allocated");
-
- dma1[channel].dmaisrfunc = NULL;
- dmamsk1 &= ~(1 << channel);
- if (dmamsk1 == 0)
- RCC->AHBENR &= ~RCC_AHBENR_DMA1EN;
-#if STM32_HAS_DMA2
- break;
- case STM32_DMA2_ID:
- /* Check if the channel is not taken.*/
- chDbgAssert((dmamsk2 & (1 << channel)) != 0,
- "dmaRelease(), #2", "not allocated");
-
- dma2[channel].dmaisrfunc = NULL;
- dmamsk2 &= ~(1 << channel);
- if (dmamsk2 == 0)
- RCC->AHBENR &= ~RCC_AHBENR_DMA2EN;
- break;
- }
-#endif
-}
-
-#endif /* STM32_DMA_REQUIRED */
-
-/** @} */
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