stm32_dma.h

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/*
 * Copyright (c) 2023 STMicroelectronics
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_DMA_STM32_DMA_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_DMA_STM32_DMA_H_

#define STM32_DMA_CH_CFG_MODE(val)              ((val & 0x1) << 5)
#define STM32_DMA_MODE_NORMAL                   STM32_DMA_CH_CFG_MODE(0)
#define STM32_DMA_MODE_CYCLIC                   STM32_DMA_CH_CFG_MODE(1)

#define STM32_DMA_CH_CFG_DIRECTION(val)         ((val & 0x3) << 6)
#define STM32_DMA_MEMORY_TO_MEMORY              STM32_DMA_CH_CFG_DIRECTION(0)
#define STM32_DMA_MEMORY_TO_PERIPH              STM32_DMA_CH_CFG_DIRECTION(1)
#define STM32_DMA_PERIPH_TO_MEMORY              STM32_DMA_CH_CFG_DIRECTION(2)
#define STM32_DMA_PERIPH_TO_PERIPH              STM32_DMA_CH_CFG_DIRECTION(3)

#define STM32_DMA_CH_CFG_PERIPH_ADDR_INC(val)   ((val & 0x1) << 9)
#define STM32_DMA_PERIPH_NO_INC                 STM32_DMA_CH_CFG_PERIPH_ADDR_INC(0)
#define STM32_DMA_PERIPH_INC                    STM32_DMA_CH_CFG_PERIPH_ADDR_INC(1)

#define STM32_DMA_CH_CFG_MEM_ADDR_INC(val)      ((val & 0x1) << 10)
#define STM32_DMA_MEM_NO_INC                    STM32_DMA_CH_CFG_MEM_ADDR_INC(0)
#define STM32_DMA_MEM_INC                       STM32_DMA_CH_CFG_MEM_ADDR_INC(1)

#define STM32_DMA_CH_CFG_PERIPH_WIDTH(val)      ((val & 0x3) << 11)
#define STM32_DMA_PERIPH_8BITS                  STM32_DMA_CH_CFG_PERIPH_WIDTH(0)
#define STM32_DMA_PERIPH_16BITS                 STM32_DMA_CH_CFG_PERIPH_WIDTH(1)
#define STM32_DMA_PERIPH_32BITS                 STM32_DMA_CH_CFG_PERIPH_WIDTH(2)

#define STM32_DMA_CH_CFG_MEM_WIDTH(val)         ((val & 0x3) << 13)
#define STM32_DMA_MEM_8BITS                     STM32_DMA_CH_CFG_MEM_WIDTH(0)
#define STM32_DMA_MEM_16BITS                    STM32_DMA_CH_CFG_MEM_WIDTH(1)
#define STM32_DMA_MEM_32BITS                    STM32_DMA_CH_CFG_MEM_WIDTH(2)

#define STM32_DMA_CH_CFG_PERIPH_INC_FIXED(val)  ((val & 0x1) << 15)
#define STM32_DMA_OFFSET_LINKED_BUS             STM32_DMA_CH_CFG_PERIPH_INC_FIXED(0)
#define STM32_DMA_OFFSET_FIXED_4                STM32_DMA_CH_CFG_PERIPH_INC_FIXED(1)

#define STM32_DMA_CH_CFG_PRIORITY(val)          ((val & 0x3) << 16)
#define STM32_DMA_PRIORITY_LOW                  STM32_DMA_CH_CFG_PRIORITY(0)
#define STM32_DMA_PRIORITY_MEDIUM               STM32_DMA_CH_CFG_PRIORITY(1)
#define STM32_DMA_PRIORITY_HIGH                 STM32_DMA_CH_CFG_PRIORITY(2)
#define STM32_DMA_PRIORITY_VERY_HIGH            STM32_DMA_CH_CFG_PRIORITY(3)

#define STM32_DMA_FIFO_1_4                      0U
#define STM32_DMA_FIFO_HALF                     1U
#define STM32_DMA_FIFO_3_4                      2U
#define STM32_DMA_FIFO_FULL                     3U
 
/* DMA  usual combination for peripheral transfer */
#define STM32_DMA_PERIPH_TX     (STM32_DMA_MEMORY_TO_PERIPH | STM32_DMA_MEM_INC)
#define STM32_DMA_PERIPH_RX     (STM32_DMA_PERIPH_TO_MEMORY | STM32_DMA_MEM_INC)
 
#define STM32_DMA_16BITS        (STM32_DMA_PERIPH_16BITS | STM32_DMA_MEM_16BITS)

 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_DMA_STM32_DMA_H_ */