/* 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
*/ staticinlinevoid
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
*/ staticinlinevoid
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
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