projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ddeccb8d HS |
1 | /* |
| 2 | * S3C24XX DMA handling | |
| 3 | * | |
| 4 | * Copyright (c) 2013 Heiko Stuebner <heiko@sntech.de> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the Free | |
| 8 | * Software Foundation; either version 2 of the License, or (at your option) | |
| 9 | * any later version. | |
| 10 | */ | |
| 11 | ||
| 1fecf895 HS |
12 | /* Helper to encode the source selection constraints for early s3c socs. */ |
| 13 | #define S3C24XX_DMA_CHANREQ(src, chan) ((BIT(3) | src) << chan * 4) | |
| 14 | ||
| ddeccb8d HS |
15 | enum s3c24xx_dma_bus { |
| 16 | S3C24XX_DMA_APB, | |
| 17 | S3C24XX_DMA_AHB, | |
| 18 | }; | |
| 19 | ||
| 20 | /** | |
| 21 | * @bus: on which bus does the peripheral reside - AHB or APB. | |
| 22 | * @handshake: is a handshake with the peripheral necessary | |
| 23 | * @chansel: channel selection information, depending on variant; reqsel for | |
| 24 | * s3c2443 and later and channel-selection map for earlier SoCs | |
| 25 | * see CHANSEL doc in s3c2443-dma.c | |
| 26 | */ | |
| 27 | struct s3c24xx_dma_channel { | |
| 28 | enum s3c24xx_dma_bus bus; | |
| 29 | bool handshake; | |
| 30 | u16 chansel; | |
| 31 | }; | |
| 32 | ||
| 33 | /** | |
| 34 | * struct s3c24xx_dma_platdata - platform specific settings | |
| 35 | * @num_phy_channels: number of physical channels | |
| 36 | * @channels: array of virtual channel descriptions | |
| 37 | * @num_channels: number of virtual channels | |
| 38 | */ | |
| 39 | struct s3c24xx_dma_platdata { | |
| 40 | int num_phy_channels; | |
| 41 | struct s3c24xx_dma_channel *channels; | |
| 42 | int num_channels; | |
| 43 | }; | |
| 44 | ||
| 45 | struct dma_chan; | |
| 46 | bool s3c24xx_dma_filter(struct dma_chan *chan, void *param); |