xtensa/esp32s3: Add APIs to release DMA channel resources
Signed-off-by: chenwen@espressif.com <chenwen@espressif.com>
This commit is contained in:
chenwen@espressif.com
Alan Carvalho de Assis
parent
22110b3b83
commit
bdd02cc624
@ -52,6 +52,8 @@
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# define ALIGN_UP(num, align) (((num) + ((align) - 1)) & ~((align) - 1))
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#endif
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#define DMA_INVALID_PERIPH_ID (0x3F)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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@ -166,6 +168,55 @@ int32_t esp32s3_dma_request(enum esp32s3_dma_periph_e periph,
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return chan;
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}
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/****************************************************************************
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* Name: esp32s3_dma_release
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*
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* Description:
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* Release DMA channel from peripheral.
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*
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* Input Parameters:
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* chan - Peripheral for which the DMA channel request was made
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void esp32s3_dma_release(int chan)
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{
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DEBUGASSERT(chan < ESP32S3_DMA_CHAN_MAX);
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nxmutex_lock(&g_dma_lock);
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/* Disconnect DMA TX channel from peripheral */
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SET_GDMA_CH_REG(DMA_OUT_PERI_SEL_CH0_REG, chan, DMA_INVALID_PERIPH_ID);
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/* Disconnect DMA RX channel from peripheral */
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SET_GDMA_CH_REG(DMA_IN_PERI_SEL_CH0_REG, chan, DMA_INVALID_PERIPH_ID);
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CLR_GDMA_CH_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_MEM_TRANS_EN_CH0_M);
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/* Disable DMA TX/RX channels burst sending data */
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CLR_GDMA_CH_BITS(DMA_OUT_CONF0_CH0_REG, chan, DMA_OUT_DATA_BURST_EN_CH0_M);
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CLR_GDMA_CH_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_IN_DATA_BURST_EN_CH0_M);
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/* Disable DMA TX/RX channels burst reading descriptor link */
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CLR_GDMA_CH_BITS(DMA_OUT_CONF0_CH0_REG, chan, DMA_OUTDSCR_BURST_EN_CH0_M);
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CLR_GDMA_CH_BITS(DMA_IN_CONF0_CH0_REG, chan, DMA_INDSCR_BURST_EN_CH0_M);
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/* Reset the priority to 0 (lowest) */
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SET_GDMA_CH_REG(DMA_OUT_PRI_CH0_REG, chan, 0);
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SET_GDMA_CH_REG(DMA_IN_PRI_CH0_REG, chan, 0);
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g_dma_chan_used[chan] = false;
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nxmutex_unlock(&g_dma_lock);
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}
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/****************************************************************************
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* Name: esp32s3_dma_setup
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*
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@ -463,3 +514,39 @@ void esp32s3_dma_init(void)
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nxmutex_unlock(&g_dma_lock);
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}
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/****************************************************************************
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* Name: esp32s3_dma_deinit
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*
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* Description:
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* Deinitialize DMA driver.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void esp32s3_dma_deinit(void)
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{
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nxmutex_lock(&g_dma_lock);
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g_dma_ref--;
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if (!g_dma_ref)
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{
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/* Disable DMA clock gating */
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modifyreg32(DMA_MISC_CONF_REG, DMA_CLK_EN_M, 0);
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/* Disable DMA module by gating the clock and asserting the reset
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* signal.
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*/
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modifyreg32(SYSTEM_PERIP_CLK_EN1_REG, SYSTEM_DMA_CLK_EN_M, 0);
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modifyreg32(SYSTEM_PERIP_RST_EN1_REG, 0, SYSTEM_DMA_RST_M);
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}
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nxmutex_unlock(&g_dma_lock);
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}
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@ -145,6 +145,22 @@ int32_t esp32s3_dma_request(enum esp32s3_dma_periph_e periph,
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uint32_t rx_prio,
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bool burst_en);
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/****************************************************************************
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* Name: esp32s3_dma_release
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*
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* Description:
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* Release DMA channel from peripheral.
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*
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* Input Parameters:
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* chan - Peripheral for which the DMA channel request was made
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void esp32s3_dma_release(int chan);
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/****************************************************************************
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* Name: esp32s3_dma_setup
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*
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@ -272,6 +288,22 @@ void esp32s3_dma_set_ext_memblk(int chan, bool tx,
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void esp32s3_dma_init(void);
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/****************************************************************************
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* Name: esp32s3_dma_deinit
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*
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* Description:
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* Deinitialize DMA driver.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void esp32s3_dma_deinit(void);
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#ifdef __cplusplus
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}
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#endif
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@ -430,8 +430,8 @@ static struct esp32s3_spi_priv_s esp32s3_spi3_priv =
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* Set the bits of the SPI register.
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*
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* Input Parameters:
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* addr - Address of the register of interest
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* bits - Bits to be set
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* addr - Address of the register of interest
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* bits - Bits to be set
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*
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* Returned Value:
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* None.
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@ -452,8 +452,8 @@ static inline void esp32s3_spi_set_regbits(uint32_t addr, uint32_t bits)
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* Clear the bits of the SPI register.
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*
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* Input Parameters:
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* addr - Address of the register of interest
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* bits - Bits to be cleared
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* addr - Address of the register of interest
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* bits - Bits to be cleared
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*
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* Returned Value:
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* None.
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@ -511,8 +511,8 @@ static inline bool esp32s3_spi_iomux(struct esp32s3_spi_priv_s *priv)
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* Lock or unlock the SPI device.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* lock - true: Lock SPI bus, false: unlock SPI bus
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* dev - Device-specific state data
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* lock - true: Lock SPI bus, false: unlock SPI bus
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*
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* Returned Value:
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* The result of lock or unlock the SPI device.
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@ -1302,7 +1302,7 @@ static void esp32s3_spi_recvblock(struct spi_dev_s *dev,
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* Trigger a previously configured DMA transfer.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* OK - Trigger was fired
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@ -1318,6 +1318,8 @@ static int esp32s3_spi_trigger(struct spi_dev_s *dev)
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}
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#endif
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#ifdef CONFIG_ESP32S3_SPI_DMA
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/****************************************************************************
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* Name: esp32s3_spi_dma_init
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*
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@ -1325,14 +1327,13 @@ static int esp32s3_spi_trigger(struct spi_dev_s *dev)
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* Initialize ESP32-S3 SPI connection to GDMA engine.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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#ifdef CONFIG_ESP32S3_SPI_DMA
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void esp32s3_spi_dma_init(struct spi_dev_s *dev)
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{
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struct esp32s3_spi_priv_s *priv = (struct esp32s3_spi_priv_s *)dev;
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@ -1374,6 +1375,37 @@ void esp32s3_spi_dma_init(struct spi_dev_s *dev)
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putreg32((SPI_SLV_RX_SEG_TRANS_CLR_EN_M | SPI_SLV_TX_SEG_TRANS_CLR_EN_M),
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SPI_DMA_CONF_REG(priv->config->id));
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}
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/****************************************************************************
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* Name: esp32s3_spi_dma_deinit
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*
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* Description:
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* Deinitialize ESP32-S3 SPI GDMA engine.
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*
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* Input Parameters:
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* dev - Device-specific state data
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void esp32s3_spi_dma_deinit(struct spi_dev_s *dev)
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{
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struct esp32s3_spi_priv_s *priv = (struct esp32s3_spi_priv_s *)dev;
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/* Release a DMA channel from peripheral */
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esp32s3_dma_release(priv->dma_channel);
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/* Deinitialize DMA controller */
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esp32s3_dma_deinit();
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/* Disable DMA clock for the SPI peripheral */
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modifyreg32(SYSTEM_PERIP_CLK_EN0_REG, priv->config->dma_clk_bit, 0);
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}
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#endif
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/****************************************************************************
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@ -1383,7 +1415,7 @@ void esp32s3_spi_dma_init(struct spi_dev_s *dev)
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* Initialize ESP32-S3 SPI hardware interface.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* None.
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@ -1476,7 +1508,7 @@ static void esp32s3_spi_init(struct spi_dev_s *dev)
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* Deinitialize ESP32-S3 SPI hardware interface.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* None.
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@ -1488,7 +1520,7 @@ static void esp32s3_spi_deinit(struct spi_dev_s *dev)
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struct esp32s3_spi_priv_s *priv = (struct esp32s3_spi_priv_s *)dev;
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#ifdef CONFIG_ESP32S3_SPI_DMA
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modifyreg32(SYSTEM_PERIP_CLK_EN0_REG, priv->config->dma_clk_bit, 0);
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esp32s3_spi_dma_deinit(dev);
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#endif
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modifyreg32(SYSTEM_PERIP_RST_EN0_REG, 0, priv->config->clk_bit);
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@ -1538,7 +1570,7 @@ static int esp32s3_spi_interrupt(int irq, void *context, void *arg)
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* Initialize the selected SPI bus.
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*
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* Input Parameters:
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* port - Port number (for hardware that has multiple SPI interfaces)
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* port - Port number (for hardware that has multiple SPI interfaces)
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*
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* Returned Value:
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* Valid SPI device structure reference on success; NULL on failure.
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@ -1637,7 +1669,7 @@ struct spi_dev_s *esp32s3_spibus_initialize(int port)
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* Uninitialize an SPI bus.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise -1 (ERROR).
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@ -69,7 +69,7 @@ extern "C"
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* Initialize the selected SPI bus.
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*
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* Input Parameters:
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* port - Port number (for hardware that has multiple SPI interfaces)
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* port - Port number (for hardware that has multiple SPI interfaces)
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*
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* Returned Value:
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* Valid SPI device structure reference on success; NULL on failure
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@ -134,7 +134,7 @@ int esp32s3_spi3_cmddata(struct spi_dev_s *dev,
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* Uninitialize an SPI bus.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* dev - Device-specific state data
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise -1 (ERROR).
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