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

Signed-off-by: Bryan Wu <bryan.wu@analog.com>

Author: Bryan Wu

arch/blackfin/kernel/bfin_dma_5xx.c

@@ -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

@@ -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

@@ -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

@@ -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

@@ -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 */

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

@@ -70,5 +70,5 @@
 #define MAX_BLACKFIN_DMA_CHANNEL 32
 
 extern int channel2irq(unsigned int channel);
-extern struct dma_register *base_addr[];
+extern struct dma_register *base_addr[MAX_BLACKFIN_DMA_CHANNEL];
 #endif