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Commit 452af71f authored by Bryan Wu's avatar Bryan Wu
Browse files

Blackfin arch: dma add some API and cleanup bf54x DMA definition 



Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
parent 780431e3

arch/blackfin/kernel/bfin_dma_5xx.c

+26 −0
Original line number Diff line number Diff line
@@ -420,6 +420,32 @@ unsigned short get_dma_curr_ycount(unsigned int channel) 
}

EXPORT_SYMBOL(get_dma_curr_ycount);



unsigned long get_dma_next_desc_ptr(unsigned int channel)

{

	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE

	      && channel < MAX_BLACKFIN_DMA_CHANNEL));



	return dma_ch[channel].regs->next_desc_ptr;

}

EXPORT_SYMBOL(get_dma_next_desc_ptr);



unsigned long get_dma_curr_desc_ptr(unsigned int channel)

{

	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE

	      && channel < MAX_BLACKFIN_DMA_CHANNEL));



	return dma_ch[channel].regs->curr_desc_ptr;

}



unsigned long get_dma_curr_addr(unsigned int channel)

{

	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE

	      && channel < MAX_BLACKFIN_DMA_CHANNEL));



	return dma_ch[channel].regs->curr_addr_ptr;

}

EXPORT_SYMBOL(get_dma_curr_addr);



static void *__dma_memcpy(void *dest, const void *src, size_t size)

{

	int direction;	/* 1 - address decrease, 0 - address increase */

arch/blackfin/mach-bf548/dma.c

+1 −0
Original line number Diff line number Diff line
@@ -64,6 +64,7 @@ 
	(struct dma_register *) MDMA_D3_NEXT_DESC_PTR,

	(struct dma_register *) MDMA_S3_NEXT_DESC_PTR,

};

EXPORT_SYMBOL(base_addr);



int channel2irq(unsigned int channel)

{

include/asm-blackfin/dma.h

+4 −3
Original line number Diff line number Diff line
@@ -109,9 +109,7 @@ struct dma_register { 


	unsigned long curr_desc_ptr;	/* DMA Current Descriptor Pointer

					   register */

	unsigned short curr_addr_ptr_lo;	/* DMA Current Address Pointer

						   register */

	unsigned short curr_addr_ptr_hi;	/* DMA Current Address Pointer

	unsigned long curr_addr_ptr;	/* DMA Current Address Pointer

						   register */

	unsigned short irq_status;	/* DMA irq status register */

	unsigned short dummy6;
@@ -166,6 +164,9 @@ void set_dma_curr_addr(unsigned int channel, unsigned long addr); 
unsigned short get_dma_curr_irqstat(unsigned int channel);

unsigned short get_dma_curr_xcount(unsigned int channel);

unsigned short get_dma_curr_ycount(unsigned int channel);

unsigned long get_dma_next_desc_ptr(unsigned int channel);

unsigned long get_dma_curr_desc_ptr(unsigned int channel);

unsigned long get_dma_curr_addr(unsigned int channel);



/* set large DMA mode descriptor */

void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg);

include/asm-blackfin/mach-bf548/defBF549.h

+1 −1
Original line number Diff line number Diff line
@@ -1178,7 +1178,7 @@ 


/* Bit masks for HOST_STATUS */



#define                     READY  0x1        /* DMA Ready */

#define                 DMA_READY  0x1        /* DMA Ready */

#define                  FIFOFULL  0x2        /* FIFO Full */

#define                 FIFOEMPTY  0x4        /* FIFO Empty */

#define              DMA_COMPLETE  0x8        /* DMA Complete */

include/asm-blackfin/mach-bf548/defBF54x_base.h

+1 −1
Original line number Diff line number Diff line
@@ -3303,7 +3303,7 @@ 


#define                       MFD  0xf000     /* Multi channel Frame Delay */

#define                      FSDR  0x80       /* Frame Sync to Data Relationship */

#define                     MCMEM  0x10       /* Multi channel Frame Mode Enable */

#define                  MCMEN  0x10       /* Multi channel Frame Mode Enable */

#define                   MCDRXPE  0x8        /* Multi channel DMA Receive Packing */

#define                   MCDTXPE  0x4        /* Multi channel DMA Transmit Packing */

#define                     MCCRM  0x3        /* 2X Clock Recovery Mode */