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authorSonic Zhang <sonic.zhang@analog.com>2007-08-05 16:14:58 +0800
committerBryan Wu <bryan.wu@analog.com>2007-08-05 16:14:58 +0800
commit8a26ac7043b0cb3b446ad9f9a3ec0992d0fea1f7 (patch)
tree27134ed1c717e041d5f1f5d60375deb899ce2457 /arch/blackfin/kernel
parentBlackfin arch: kill ezkit548 compiling warning (diff)
downloadlinux-dev-8a26ac7043b0cb3b446ad9f9a3ec0992d0fea1f7.tar.xz
linux-dev-8a26ac7043b0cb3b446ad9f9a3ec0992d0fea1f7.zip
Blackfin arch: Add DMA API to set curr descriptor address
This API is necessary for DMA descriptor array mode. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 62f5a35c13ee..f0db6c5c8d1a 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -270,10 +270,23 @@ void set_dma_next_desc_addr(unsigned int channel, unsigned long addr)
dma_ch[channel].regs->next_desc_ptr = addr;
SSYNC();
- pr_debug("set_dma_start_addr() : END\n");
+ pr_debug("set_dma_next_desc_addr() : END\n");
}
EXPORT_SYMBOL(set_dma_next_desc_addr);
+void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr)
+{
+ pr_debug("set_dma_curr_desc_addr() : BEGIN \n");
+
+ BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+ && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+ dma_ch[channel].regs->curr_desc_ptr = addr;
+ SSYNC();
+ pr_debug("set_dma_curr_desc_addr() : END\n");
+}
+EXPORT_SYMBOL(set_dma_curr_desc_addr);
+
void set_dma_x_count(unsigned int channel, unsigned short x_count)
{
BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE