1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
4 | */ |
5 | |
6 | #ifndef _QCOM_BAM_DMA_H |
7 | #define _QCOM_BAM_DMA_H |
8 | |
9 | #include <asm/byteorder.h> |
10 | |
11 | /* |
12 | * This data type corresponds to the native Command Element |
13 | * supported by BAM DMA Engine. |
14 | * |
15 | * @cmd_and_addr - upper 8 bits command and lower 24 bits register address. |
16 | * @data - for write command: content to be written into peripheral register. |
17 | * for read command: dest addr to write peripheral register value. |
18 | * @mask - register mask. |
19 | * @reserved - for future usage. |
20 | * |
21 | */ |
22 | struct bam_cmd_element { |
23 | __le32 cmd_and_addr; |
24 | __le32 data; |
25 | __le32 mask; |
26 | __le32 reserved; |
27 | }; |
28 | |
29 | /* |
30 | * This enum indicates the command type in a command element |
31 | */ |
32 | enum bam_command_type { |
33 | BAM_WRITE_COMMAND = 0, |
34 | BAM_READ_COMMAND, |
35 | }; |
36 | |
37 | /* |
38 | * prep_bam_ce_le32 - Wrapper function to prepare a single BAM command |
39 | * element with the data already in le32 format. |
40 | * |
41 | * @bam_ce: bam command element |
42 | * @addr: target address |
43 | * @cmd: BAM command |
44 | * @data: actual data for write and dest addr for read in le32 |
45 | */ |
46 | static inline void |
47 | bam_prep_ce_le32(struct bam_cmd_element *bam_ce, u32 addr, |
48 | enum bam_command_type cmd, __le32 data) |
49 | { |
50 | bam_ce->cmd_and_addr = |
51 | cpu_to_le32((addr & 0xffffff) | ((cmd & 0xff) << 24)); |
52 | bam_ce->data = data; |
53 | bam_ce->mask = cpu_to_le32(0xffffffff); |
54 | } |
55 | |
56 | /* |
57 | * bam_prep_ce - Wrapper function to prepare a single BAM command element |
58 | * with the data. |
59 | * |
60 | * @bam_ce: BAM command element |
61 | * @addr: target address |
62 | * @cmd: BAM command |
63 | * @data: actual data for write and dest addr for read |
64 | */ |
65 | static inline void |
66 | bam_prep_ce(struct bam_cmd_element *bam_ce, u32 addr, |
67 | enum bam_command_type cmd, u32 data) |
68 | { |
69 | bam_prep_ce_le32(bam_ce, addr, cmd, cpu_to_le32(data)); |
70 | } |
71 | #endif |
72 | |