diff options
Diffstat (limited to 'arch/arm/plat-s3c64xx/include/plat/dma-plat.h')
| -rw-r--r-- | arch/arm/plat-s3c64xx/include/plat/dma-plat.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c64xx/include/plat/dma-plat.h b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h new file mode 100644 index 00000000000..0c30dd98672 --- /dev/null +++ b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h @@ -0,0 +1,70 @@ +/* linux/arch/arm/plat-s3c64xx/include/plat/dma-plat.h + * + * Copyright 2009 Openmoko, Inc. + * Copyright 2009 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C64XX DMA core + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */ + +struct s3c64xx_dma_buff; + +/** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor + * @next: Pointer to next buffer in queue or ring. + * @pw: Client provided identifier + * @lli: Pointer to hardware descriptor this buffer is associated with. + * @lli_dma: Hardare address of the descriptor. + */ +struct s3c64xx_dma_buff { + struct s3c64xx_dma_buff *next; + + void *pw; + struct pl080_lli *lli; + dma_addr_t lli_dma; +}; + +struct s3c64xx_dmac; + +struct s3c2410_dma_chan { + unsigned char number; /* number of this dma channel */ + unsigned char in_use; /* channel allocated */ + unsigned char bit; /* bit for enable/disable/etc */ + unsigned char hw_width; + unsigned char peripheral; + + unsigned int flags; + enum s3c2410_dmasrc source; + + + dma_addr_t dev_addr; + + struct s3c2410_dma_client *client; + struct s3c64xx_dmac *dmac; /* pointer to controller */ + + void __iomem *regs; + + /* cdriver callbacks */ + s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */ + s3c2410_dma_opfn_t op_fn; /* channel op callback */ + + /* buffer list and information */ + struct s3c64xx_dma_buff *curr; /* current dma buffer */ + struct s3c64xx_dma_buff *next; /* next buffer to load */ + struct s3c64xx_dma_buff *end; /* end of queue */ + + /* note, when channel is running in circular mode, curr is the + * first buffer enqueued, end is the last and curr is where the + * last buffer-done event is set-at. The buffers are not freed + * and the last buffer hardware descriptor points back to the + * first. + */ +}; + +#include <plat/dma-core.h> |