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>

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);