diff options
Diffstat (limited to 'arch/arm/mach-s3c64xx/include/mach/dma.h')
-rw-r--r-- | arch/arm/mach-s3c64xx/include/mach/dma.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c64xx/include/mach/dma.h b/arch/arm/mach-s3c64xx/include/mach/dma.h new file mode 100644 index 00000000000..0a5d9268a23 --- /dev/null +++ b/arch/arm/mach-s3c64xx/include/mach/dma.h @@ -0,0 +1,127 @@ +/* linux/arch/arm/mach-s3c6400/include/mach/dma.h + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C6400 - DMA support + */ + +#ifndef __ASM_ARCH_DMA_H +#define __ASM_ARCH_DMA_H __FILE__ + +#define S3C_DMA_CHANNELS (16) + +/* see mach-s3c2410/dma.h for notes on dma channel numbers */ + +/* Note, for the S3C64XX architecture we keep the DMACH_ + * defines in the order they are allocated to [S]DMA0/[S]DMA1 + * so that is easy to do DHACH_ -> DMA controller conversion + */ +enum dma_ch { + /* DMA0/SDMA0 */ + DMACH_UART0 = 0, + DMACH_UART0_SRC2, + DMACH_UART1, + DMACH_UART1_SRC2, + DMACH_UART2, + DMACH_UART2_SRC2, + DMACH_UART3, + DMACH_UART3_SRC2, + DMACH_PCM0_TX, + DMACH_PCM0_RX, + DMACH_I2S0_OUT, + DMACH_I2S0_IN, + DMACH_SPI0_TX, + DMACH_SPI0_RX, + DMACH_HSI_I2SV40_TX, + DMACH_HSI_I2SV40_RX, + + /* DMA1/SDMA1 */ + DMACH_PCM1_TX = 16, + DMACH_PCM1_RX, + DMACH_I2S1_OUT, + DMACH_I2S1_IN, + DMACH_SPI1_TX, + DMACH_SPI1_RX, + DMACH_AC97_PCMOUT, + DMACH_AC97_PCMIN, + DMACH_AC97_MICIN, + DMACH_PWM, + DMACH_IRDA, + DMACH_EXTERNAL, + DMACH_RES1, + DMACH_RES2, + DMACH_SECURITY_RX, /* SDMA1 only */ + DMACH_SECURITY_TX, /* SDMA1 only */ + DMACH_MAX /* the end */ +}; + +static __inline__ bool s3c_dma_has_circular(void) +{ + return true; +} + +#define S3C2410_DMAF_CIRCULAR (1 << 0) + +#include <plat/dma.h> + +#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 pl080s_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> + +#endif /* __ASM_ARCH_IRQ_H */ |