1 /* 2 * Copyright (c) 2018 STMicroelectronics 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef _STM32_I2S_H_ 8 #define _STM32_I2S_H_ 9 10 struct queue_item { 11 void *mem_block; 12 size_t size; 13 }; 14 15 /* Device constant configuration parameters */ 16 struct i2s_stm32_cfg { 17 SPI_TypeDef *i2s; 18 const struct stm32_pclken *pclken; 19 size_t pclk_len; 20 const struct pinctrl_dev_config *pcfg; 21 void (*irq_config)(const struct device *dev); 22 bool master_clk_sel; 23 }; 24 25 struct stream { 26 int32_t state; 27 struct k_msgq *msgq; 28 29 const struct device *dev_dma; 30 uint32_t dma_channel; 31 struct dma_config dma_cfg; 32 uint8_t priority; 33 bool src_addr_increment; 34 bool dst_addr_increment; 35 uint8_t fifo_threshold; 36 bool tx_stop_for_drain; 37 38 struct i2s_config cfg; 39 void *mem_block; 40 bool last_block; 41 bool master; 42 int (*stream_start)(struct stream *, const struct device *dev); 43 void (*stream_disable)(struct stream *, const struct device *dev); 44 }; 45 46 /* Device run time data */ 47 struct i2s_stm32_data { 48 struct stream rx; 49 struct stream tx; 50 }; 51 52 /* checks that DMA Tx packet is fully transmitted over the I2S */ ll_func_i2s_dma_busy(SPI_TypeDef * i2s)53static inline uint32_t ll_func_i2s_dma_busy(SPI_TypeDef *i2s) 54 { 55 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_i2s) 56 return LL_SPI_IsActiveFlag_TXC(i2s) == 0; 57 #else 58 /* the I2S Tx empty and busy flags are needed */ 59 return (LL_SPI_IsActiveFlag_TXE(i2s) && 60 !LL_SPI_IsActiveFlag_BSY(i2s)); 61 #endif 62 } 63 64 #endif /* _STM32_I2S_H_ */ 65
