| Ben Dooks | fa7a788 | 2009-03-10 23:57:26 +0000 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s3c64xx/include/plat/dma-plat.h |
| 2 | * |
| 3 | * Copyright 2009 Openmoko, Inc. |
| 4 | * Copyright 2009 Simtec Electronics |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
| 6 | * http://armlinux.simtec.co.uk/ |
| 7 | * |
| 8 | * S3C64XX DMA core |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */ |
| 16 | |
| 17 | struct s3c64xx_dma_buff; |
| 18 | |
| 19 | /** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor |
| 20 | * @next: Pointer to next buffer in queue or ring. |
| 21 | * @pw: Client provided identifier |
| 22 | * @lli: Pointer to hardware descriptor this buffer is associated with. |
| 23 | * @lli_dma: Hardare address of the descriptor. |
| 24 | */ |
| 25 | struct s3c64xx_dma_buff { |
| 26 | struct s3c64xx_dma_buff *next; |
| 27 | |
| 28 | void *pw; |
| Jassi | 23c94b4 | 2009-09-15 19:01:18 +0900 | [diff] [blame] | 29 | struct pl080s_lli *lli; |
| Ben Dooks | fa7a788 | 2009-03-10 23:57:26 +0000 | [diff] [blame] | 30 | dma_addr_t lli_dma; |
| 31 | }; |
| 32 | |
| 33 | struct s3c64xx_dmac; |
| 34 | |
| 35 | struct s3c2410_dma_chan { |
| 36 | unsigned char number; /* number of this dma channel */ |
| 37 | unsigned char in_use; /* channel allocated */ |
| 38 | unsigned char bit; /* bit for enable/disable/etc */ |
| 39 | unsigned char hw_width; |
| 40 | unsigned char peripheral; |
| 41 | |
| 42 | unsigned int flags; |
| 43 | enum s3c2410_dmasrc source; |
| 44 | |
| 45 | |
| 46 | dma_addr_t dev_addr; |
| 47 | |
| 48 | struct s3c2410_dma_client *client; |
| 49 | struct s3c64xx_dmac *dmac; /* pointer to controller */ |
| 50 | |
| 51 | void __iomem *regs; |
| 52 | |
| 53 | /* cdriver callbacks */ |
| 54 | s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */ |
| 55 | s3c2410_dma_opfn_t op_fn; /* channel op callback */ |
| 56 | |
| 57 | /* buffer list and information */ |
| 58 | struct s3c64xx_dma_buff *curr; /* current dma buffer */ |
| 59 | struct s3c64xx_dma_buff *next; /* next buffer to load */ |
| 60 | struct s3c64xx_dma_buff *end; /* end of queue */ |
| 61 | |
| 62 | /* note, when channel is running in circular mode, curr is the |
| 63 | * first buffer enqueued, end is the last and curr is where the |
| 64 | * last buffer-done event is set-at. The buffers are not freed |
| 65 | * and the last buffer hardware descriptor points back to the |
| 66 | * first. |
| 67 | */ |
| 68 | }; |
| 69 | |
| 70 | #include <plat/dma-core.h> |