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편집 파일: qcom_bam_dma.h

/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. */ #ifndef _QCOM_BAM_DMA_H #define _QCOM_BAM_DMA_H #include <asm/byteorder.h> /* * This data type corresponds to the native Command Element * supported by BAM DMA Engine. * * @cmd_and_addr - upper 8 bits command and lower 24 bits register address. * @data - for write command: content to be written into peripheral register. * for read command: dest addr to write peripheral register value. * @mask - register mask. * @reserved - for future usage. * */ struct bam_cmd_element { __le32 cmd_and_addr; __le32 data; __le32 mask; __le32 reserved; }; /* * This enum indicates the command type in a command element */ enum bam_command_type { BAM_WRITE_COMMAND = 0, BAM_READ_COMMAND, }; /* * prep_bam_ce_le32 - Wrapper function to prepare a single BAM command * element with the data already in le32 format. * * @bam_ce: bam command element * @addr: target address * @cmd: BAM command * @data: actual data for write and dest addr for read in le32 */ static inline void bam_prep_ce_le32(struct bam_cmd_element *bam_ce, u32 addr, enum bam_command_type cmd, __le32 data) { bam_ce->cmd_and_addr = cpu_to_le32((addr & 0xffffff) | ((cmd & 0xff) << 24)); bam_ce->data = data; bam_ce->mask = cpu_to_le32(0xffffffff); } /* * bam_prep_ce - Wrapper function to prepare a single BAM command element * with the data. * * @bam_ce: BAM command element * @addr: target address * @cmd: BAM command * @data: actual data for write and dest addr for read */ static inline void bam_prep_ce(struct bam_cmd_element *bam_ce, u32 addr, enum bam_command_type cmd, u32 data) { bam_prep_ce_le32(bam_ce, addr, cmd, cpu_to_le32(data)); } #endif