9c92ab6191
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
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*/
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#ifndef _QCOM_BAM_DMA_H
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#define _QCOM_BAM_DMA_H
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#include <asm/byteorder.h>
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/*
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* This data type corresponds to the native Command Element
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* supported by BAM DMA Engine.
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*
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* @cmd_and_addr - upper 8 bits command and lower 24 bits register address.
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* @data - for write command: content to be written into peripheral register.
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* for read command: dest addr to write peripheral register value.
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* @mask - register mask.
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* @reserved - for future usage.
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*
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*/
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struct bam_cmd_element {
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__le32 cmd_and_addr;
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__le32 data;
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__le32 mask;
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__le32 reserved;
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};
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/*
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* This enum indicates the command type in a command element
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*/
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enum bam_command_type {
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BAM_WRITE_COMMAND = 0,
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BAM_READ_COMMAND,
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};
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/*
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* prep_bam_ce_le32 - Wrapper function to prepare a single BAM command
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* element with the data already in le32 format.
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*
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* @bam_ce: bam command element
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* @addr: target address
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* @cmd: BAM command
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* @data: actual data for write and dest addr for read in le32
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*/
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static inline void
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bam_prep_ce_le32(struct bam_cmd_element *bam_ce, u32 addr,
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enum bam_command_type cmd, __le32 data)
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{
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bam_ce->cmd_and_addr =
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cpu_to_le32((addr & 0xffffff) | ((cmd & 0xff) << 24));
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bam_ce->data = data;
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bam_ce->mask = cpu_to_le32(0xffffffff);
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}
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/*
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* bam_prep_ce - Wrapper function to prepare a single BAM command element
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* with the data.
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*
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* @bam_ce: BAM command element
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* @addr: target address
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* @cmd: BAM command
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* @data: actual data for write and dest addr for read
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*/
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static inline void
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bam_prep_ce(struct bam_cmd_element *bam_ce, u32 addr,
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enum bam_command_type cmd, u32 data)
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{
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bam_prep_ce_le32(bam_ce, addr, cmd, cpu_to_le32(data));
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}
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#endif
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