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1 | /* |
2 | * timb_dma.h timberdale FPGA DMA driver defines | |
3 | * Copyright (c) 2010 Intel Corporation | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* Supports: | |
20 | * Timberdale FPGA DMA engine | |
21 | */ | |
22 | ||
23 | #ifndef _LINUX_TIMB_DMA_H | |
24 | #define _LINUX_TIMB_DMA_H | |
25 | ||
26 | /** | |
27 | * struct timb_dma_platform_data_channel - Description of each individual | |
28 | * DMA channel for the timberdale DMA driver | |
29 | * @rx: true if this channel handles data in the direction to | |
30 | * the CPU. | |
31 | * @bytes_per_line: Number of bytes per line, this is specific for channels | |
32 | * handling video data. For other channels this shall be left to 0. | |
33 | * @descriptors: Number of descriptors to allocate for this channel. | |
34 | * @descriptor_elements: Number of elements in each descriptor. | |
35 | * | |
36 | */ | |
37 | struct timb_dma_platform_data_channel { | |
38 | bool rx; | |
39 | unsigned int bytes_per_line; | |
40 | unsigned int descriptors; | |
41 | unsigned int descriptor_elements; | |
42 | }; | |
43 | ||
44 | /** | |
45 | * struct timb_dma_platform_data - Platform data of the timberdale DMA driver | |
46 | * @nr_channels: Number of defined channels in the channels array. | |
47 | * @channels: Definition of the each channel. | |
48 | * | |
49 | */ | |
50 | struct timb_dma_platform_data { | |
51 | unsigned nr_channels; | |
52 | struct timb_dma_platform_data_channel channels[32]; | |
53 | }; | |
54 | ||
55 | #endif |