235 lines
5.5 KiB
C
235 lines
5.5 KiB
C
/*
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* Copyright (c) 2016 BayLibre, SAS
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_SPI_SPI_LL_STM32_H_
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#define ZEPHYR_DRIVERS_SPI_SPI_LL_STM32_H_
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#include "spi_context.h"
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typedef void (*irq_config_func_t)(const struct device *port);
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/* This symbol takes the value 1 if one of the device instances */
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/* is configured in dts with an optional clock */
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#if STM32_DT_INST_DEV_OPT_CLOCK_SUPPORT
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#define STM32_SPI_OPT_CLOCK_SUPPORT 1
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#else
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#define STM32_SPI_OPT_CLOCK_SUPPORT 0
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#endif
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struct spi_stm32_config {
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SPI_TypeDef *spi;
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const struct pinctrl_dev_config *pcfg;
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#ifdef CONFIG_SPI_STM32_INTERRUPT
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irq_config_func_t irq_config;
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#endif
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_spi_subghz)
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bool use_subghzspi_nss;
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#endif
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size_t pclk_len;
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const struct stm32_pclken *pclken;
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};
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#ifdef CONFIG_SPI_STM32_DMA
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#define SPI_STM32_DMA_ERROR_FLAG 0x01
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#define SPI_STM32_DMA_RX_DONE_FLAG 0x02
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#define SPI_STM32_DMA_TX_DONE_FLAG 0x04
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#define SPI_STM32_DMA_DONE_FLAG \
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(SPI_STM32_DMA_RX_DONE_FLAG | SPI_STM32_DMA_TX_DONE_FLAG)
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#define SPI_STM32_DMA_TX 0x01
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#define SPI_STM32_DMA_RX 0x02
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struct stream {
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const struct device *dma_dev;
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uint32_t channel; /* stores the channel for dma or mux */
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struct dma_config dma_cfg;
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struct dma_block_config dma_blk_cfg;
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uint8_t priority;
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bool src_addr_increment;
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bool dst_addr_increment;
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int fifo_threshold;
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};
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#endif
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struct spi_stm32_data {
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struct spi_context ctx;
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#ifdef CONFIG_SPI_STM32_DMA
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struct k_sem status_sem;
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volatile uint32_t status_flags;
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struct stream dma_rx;
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struct stream dma_tx;
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#endif
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};
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#ifdef CONFIG_SPI_STM32_DMA
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static inline uint32_t ll_func_dma_get_reg_addr(SPI_TypeDef *spi, uint32_t location)
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{
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#if defined(CONFIG_SOC_SERIES_STM32H7X)
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if (location == SPI_STM32_DMA_TX) {
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/* use direct register location until the LL_SPI_DMA_GetTxRegAddr exists */
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return (uint32_t)&(spi->TXDR);
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}
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/* use direct register location until the LL_SPI_DMA_GetRxRegAddr exists */
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return (uint32_t)&(spi->RXDR);
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#else
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ARG_UNUSED(location);
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return (uint32_t)LL_SPI_DMA_GetRegAddr(spi);
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#endif /* CONFIG_SOC_SERIES_STM32H7X */
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}
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/* checks that DMA Tx packet is fully transmitted over the SPI */
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static inline uint32_t ll_func_spi_dma_busy(SPI_TypeDef *spi)
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{
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#ifdef LL_SPI_SR_TXC
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return LL_SPI_IsActiveFlag_TXC(spi);
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#else
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/* the SPI Tx empty and busy flags are needed */
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return (LL_SPI_IsActiveFlag_TXE(spi) &&
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!LL_SPI_IsActiveFlag_BSY(spi));
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#endif
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}
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#endif /* CONFIG_SPI_STM32_DMA */
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static inline uint32_t ll_func_tx_is_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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return LL_SPI_IsActiveFlag_TXP(spi);
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#else
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return LL_SPI_IsActiveFlag_TXE(spi);
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#endif
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}
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static inline uint32_t ll_func_rx_is_not_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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return LL_SPI_IsActiveFlag_RXP(spi);
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#else
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return LL_SPI_IsActiveFlag_RXNE(spi);
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#endif
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}
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static inline void ll_func_enable_int_tx_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_EnableIT_TXP(spi);
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#else
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LL_SPI_EnableIT_TXE(spi);
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#endif
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}
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static inline void ll_func_enable_int_rx_not_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_EnableIT_RXP(spi);
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#else
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LL_SPI_EnableIT_RXNE(spi);
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#endif
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}
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static inline void ll_func_enable_int_errors(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_EnableIT_UDR(spi);
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LL_SPI_EnableIT_OVR(spi);
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LL_SPI_EnableIT_CRCERR(spi);
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LL_SPI_EnableIT_FRE(spi);
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LL_SPI_EnableIT_MODF(spi);
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#else
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LL_SPI_EnableIT_ERR(spi);
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#endif
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}
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static inline void ll_func_disable_int_tx_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_DisableIT_TXP(spi);
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#else
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LL_SPI_DisableIT_TXE(spi);
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#endif
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}
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static inline void ll_func_disable_int_rx_not_empty(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_DisableIT_RXP(spi);
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#else
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LL_SPI_DisableIT_RXNE(spi);
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#endif
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}
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static inline void ll_func_disable_int_errors(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_DisableIT_UDR(spi);
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LL_SPI_DisableIT_OVR(spi);
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LL_SPI_DisableIT_CRCERR(spi);
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LL_SPI_DisableIT_FRE(spi);
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LL_SPI_DisableIT_MODF(spi);
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#else
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LL_SPI_DisableIT_ERR(spi);
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#endif
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}
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static inline uint32_t ll_func_spi_is_busy(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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return LL_SPI_IsActiveFlag_EOT(spi);
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#else
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return LL_SPI_IsActiveFlag_BSY(spi);
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#endif
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}
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/* Header is compiled first, this switch avoid the compiler to lookup for
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* non-existing LL FIFO functions for SoC without SPI FIFO
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*/
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_spi_fifo)
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static inline void ll_func_set_fifo_threshold_8bit(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_SetFIFOThreshold(spi, LL_SPI_FIFO_TH_01DATA);
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#else
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LL_SPI_SetRxFIFOThreshold(spi, LL_SPI_RX_FIFO_TH_QUARTER);
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#endif
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}
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static inline void ll_func_set_fifo_threshold_16bit(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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LL_SPI_SetFIFOThreshold(spi, LL_SPI_FIFO_TH_02DATA);
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#else
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LL_SPI_SetRxFIFOThreshold(spi, LL_SPI_RX_FIFO_TH_HALF);
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#endif
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}
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#endif
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static inline void ll_func_disable_spi(SPI_TypeDef *spi)
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{
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_spi)
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if (LL_SPI_IsActiveMasterTransfer(spi)) {
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LL_SPI_SuspendMasterTransfer(spi);
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while (LL_SPI_IsActiveMasterTransfer(spi)) {
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/* NOP */
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}
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}
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LL_SPI_Disable(spi);
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while (LL_SPI_IsEnabled(spi)) {
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/* NOP */
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}
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/* Flush RX buffer */
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while (LL_SPI_IsActiveFlag_RXP(spi)) {
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(void)LL_SPI_ReceiveData8(spi);
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}
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LL_SPI_ClearFlag_SUSP(spi);
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#else
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LL_SPI_Disable(spi);
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#endif
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}
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#endif /* ZEPHYR_DRIVERS_SPI_SPI_LL_STM32_H_ */
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