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Blackfin arch: add set_dma_curr_addr DMA API to support sound driver recording function

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Signed-off-by: Roy Huang <roy.huang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Roy Huang 2007-10-10 23:31:19 +08:00 committed by Bryan Wu
parent 518039bc24
commit 1d945e2b3e
2 changed files with 11 additions and 0 deletions
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10
arch/blackfin/kernel/bfin_dma_5xx.c
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@ -345,6 +345,16 @@ void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg)
}
EXPORT_SYMBOL(set_dma_sg);
void set_dma_curr_addr(unsigned int channel, unsigned long addr)
{
BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
&& channel < MAX_BLACKFIN_DMA_CHANNEL));
dma_ch[channel].regs->curr_addr_ptr = addr;
SSYNC();
}
EXPORT_SYMBOL(set_dma_curr_addr);
/*------------------------------------------------------------------------------
* Get the DMA status of a specific DMA channel from the system.
*-----------------------------------------------------------------------------*/

1
include/asm-blackfin/dma.h
View File

@ -159,6 +159,7 @@ void set_dma_y_modify(unsigned int channel, short y_modify);
void set_dma_config(unsigned int channel, unsigned short config);
unsigned short set_bfin_dma_config(char direction, char flow_mode,
char intr_mode, char dma_mode, char width);
void set_dma_curr_addr(unsigned int channel, unsigned long addr);
/* get curr status for polling */
unsigned short get_dma_curr_irqstat(unsigned int channel);