72 строки
1.7 KiB
C
72 строки
1.7 KiB
C
/* 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
|