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authorRoy Huang <roy.huang@analog.com>2007-10-10 23:31:19 +0800
committerBryan Wu <bryan.wu@analog.com>2007-10-10 23:31:19 +0800
commit1d945e2b3e421f2ce01b2eb260392f888406933f (patch)
tree306716a6ebba2e17af352ece0bad9af34c9a7843
parentBlackfin arch: Add ability to expend the hardware trace buffer (diff)
downloadlinux-dev-1d945e2b3e421f2ce01b2eb260392f888406933f.tar.xz
linux-dev-1d945e2b3e421f2ce01b2eb260392f888406933f.zip
Blackfin arch: add set_dma_curr_addr DMA API to support sound driver recording function
Signed-off-by: Roy Huang <roy.huang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c10
-rw-r--r--include/asm-blackfin/dma.h1
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 7cf02f02a1db..7e2201908356 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -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.
*-----------------------------------------------------------------------------*/
diff --git a/include/asm-blackfin/dma.h b/include/asm-blackfin/dma.h
index be0d913e5516..4269082b154a 100644
--- a/include/asm-blackfin/dma.h
+++ b/include/asm-blackfin/dma.h
@@ -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);