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include: bindings: dma define the bindings for stm32 soc series

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This defines the configuration for the DMA client
as specifed in the ./dts/bindings/dma/st,stm32-dma.yaml

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2020-03-10 17:02:39 +01:00 committed by Kumar Gala
parent 32851a402f
commit 35b7a5dc34
1 changed files with 24 additions and 6 deletions
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30
include/dt-bindings/dma/stm32_dma.h
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@ -1,16 +1,34 @@
/*
* Copyright (c) 2019 Song Qiang <songqiang1304521@gmail.com>
* Copyright (c) 2020 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_
/* macros for channel-config */
#define STM32_DMA_CONFIG_DIRECTION(config) (config & 0x3 << 6)
#define STM32_DMA_CONFIG_PERIPHERAL_ADDR_INC(config) (config & 0x1 << 9)
#define STM32_DMA_CONFIG_MEMORY_ADDR_INC(config) (config & 0x1 << 10)
#define STM32_DMA_CONFIG_PERIPHERAL_DATA_SIZE(config) (config & (0x3 << 11))
#define STM32_DMA_CONFIG_MEMORY_DATA_SIZE(config) (config & (0x3 << 13))
#define STM32_DMA_CONFIG_PERIPHERAL_INC_FIXED(config) (config & 0x1 << 15)
/* direction defined on bits 6-7 */
/* 0 -> MEM_TO_MEM, 1 -> MEM_TO_PERIPH, 2 -> PERIPH_TO_MEM */
#define STM32_DMA_CONFIG_DIRECTION(config) ((config >> 6) & 0x3)
/* periph increment defined on bit 9 as true/false */
#define STM32_DMA_CONFIG_PERIPHERAL_ADDR_INC(config) ((config >> 9) & 0x1)
/* mem increment defined on bit 10 as true/false */
#define STM32_DMA_CONFIG_MEMORY_ADDR_INC(config) ((config >> 10) & 0x1)
/* perih data size defined on bits 11-12 */
/* 0 -> 1 byte, 1 -> 2 bytes, 2 -> 4 bytes */
#define STM32_DMA_CONFIG_PERIPHERAL_DATA_SIZE(config) \
(1 << ((config >> 11) & 0x3))
/* memory data size defined on bits 13, 14 */
/* 0 -> 1 byte, 1 -> 2 bytes, 2 -> 4 bytes */
#define STM32_DMA_CONFIG_MEMORY_DATA_SIZE(config) \
(1 << ((config >> 13) & 0x3))
/* priority increment offset defined on bit 15 */
#define STM32_DMA_CONFIG_PERIPHERAL_INC_FIXED(config) ((config >> 15) & 0x1)
/* priority defined on bits 16-17 as 0, 1, 2, 3 */
#define STM32_DMA_CONFIG_PRIORITY(config) ((config >> 16) & 0x3)
/* macros for features */
#define STM32_DMA_FEATURES_FIFO_THRESHOLD(features) (features & 0x3)
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_DMA_STM32_DMA_H_ */