1 files changed, 54 insertions, 39 deletions

diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index c9a59622e23f..bd2e62243abe 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -10,46 +10,70 @@
 
 #include <linux/interrupt.h>
 #include <mach/dma.h>
+#include <asm/atomic.h>
 #include <asm/blackfin.h>
 #include <asm/page.h>
-
-#define MAX_DMA_ADDRESS PAGE_OFFSET
-
-/*****************************************************************************
-*        Generic DMA  Declarations
-*
-****************************************************************************/
-enum dma_chan_status {
-        DMA_CHANNEL_FREE,
-        DMA_CHANNEL_REQUESTED,
-        DMA_CHANNEL_ENABLED,
-};
+#include <asm-generic/dma.h>
+
+/* DMA_CONFIG Masks */
+#define DMAEN                   0x0001  /* DMA Channel Enable */
+#define WNR                             0x0002  /* Channel Direction (W/R*) */
+#define WDSIZE_8                0x0000  /* Transfer Word Size = 8 */
+#define WDSIZE_16               0x0004  /* Transfer Word Size = 16 */
+#define WDSIZE_32               0x0008  /* Transfer Word Size = 32 */
+#define DMA2D                   0x0010  /* DMA Mode (2D/1D*) */
+#define RESTART                 0x0020  /* DMA Buffer Clear */
+#define DI_SEL                  0x0040  /* Data Interrupt Timing Select */
+#define DI_EN                   0x0080  /* Data Interrupt Enable */
+#define NDSIZE_0                0x0000  /* Next Descriptor Size = 0 (Stop/Autobuffer) */
+#define NDSIZE_1                0x0100  /* Next Descriptor Size = 1 */
+#define NDSIZE_2                0x0200  /* Next Descriptor Size = 2 */
+#define NDSIZE_3                0x0300  /* Next Descriptor Size = 3 */
+#define NDSIZE_4                0x0400  /* Next Descriptor Size = 4 */
+#define NDSIZE_5                0x0500  /* Next Descriptor Size = 5 */
+#define NDSIZE_6                0x0600  /* Next Descriptor Size = 6 */
+#define NDSIZE_7                0x0700  /* Next Descriptor Size = 7 */
+#define NDSIZE_8                0x0800  /* Next Descriptor Size = 8 */
+#define NDSIZE_9                0x0900  /* Next Descriptor Size = 9 */
+#define NDSIZE                  0x0f00  /* Next Descriptor Size */
+#define DMAFLOW                 0x7000  /* Flow Control */
+#define DMAFLOW_STOP    0x0000  /* Stop Mode */
+#define DMAFLOW_AUTO    0x1000  /* Autobuffer Mode */
+#define DMAFLOW_ARRAY   0x4000  /* Descriptor Array Mode */
+#define DMAFLOW_SMALL   0x6000  /* Small Model Descriptor List Mode */
+#define DMAFLOW_LARGE   0x7000  /* Large Model Descriptor List Mode */
+
+/* DMA_IRQ_STATUS Masks */
+#define DMA_DONE                0x0001  /* DMA Completion Interrupt Status */
+#define DMA_ERR                 0x0002  /* DMA Error Interrupt Status */
+#define DFETCH                  0x0004  /* DMA Descriptor Fetch Indicator */
+#define DMA_RUN                 0x0008  /* DMA Channel Running Indicator */
 
 /*-------------------------
  * config reg bits value
  *-------------------------*/
-#define DATA_SIZE_8             0
-#define DATA_SIZE_16            1
-#define DATA_SIZE_32            2
+#define DATA_SIZE_8                     0
+#define DATA_SIZE_16            1
+#define DATA_SIZE_32            2
 
-#define DMA_FLOW_STOP           0
-#define DMA_FLOW_AUTO           1
-#define DMA_FLOW_ARRAY          4
-#define DMA_FLOW_SMALL          6
-#define DMA_FLOW_LARGE          7
+#define DMA_FLOW_STOP           0
+#define DMA_FLOW_AUTO           1
+#define DMA_FLOW_ARRAY          4
+#define DMA_FLOW_SMALL          6
+#define DMA_FLOW_LARGE          7
 
-#define DIMENSION_LINEAR    0
-#define DIMENSION_2D           1
+#define DIMENSION_LINEAR        0
+#define DIMENSION_2D            1
 
-#define DIR_READ     0
-#define DIR_WRITE    1
+#define DIR_READ                        0
+#define DIR_WRITE                       1
 
-#define INTR_DISABLE   0
-#define INTR_ON_BUF    2
-#define INTR_ON_ROW    3
+#define INTR_DISABLE            0
+#define INTR_ON_BUF                     2
+#define INTR_ON_ROW                     3
 
 #define DMA_NOSYNC_KEEP_DMA_BUF 0
-#define DMA_SYNC_RESTART        1
+#define DMA_SYNC_RESTART                1
 
 struct dmasg {
         void *next_desc_addr;
@@ -104,11 +128,9 @@ struct dma_register {
 
 };
 
-struct mutex;
 struct dma_channel {
-        struct mutex dmalock;
         const char *device_id;
-        enum dma_chan_status chan_status;
+        atomic_t chan_status;
         volatile struct dma_register *regs;
         struct dmasg *sg;               /* large mode descriptor */
         unsigned int irq;
@@ -220,27 +242,20 @@ static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize
 
 static inline int dma_channel_active(unsigned int channel)
 {
-        if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE)
-                return 0;
-        else
-                return 1;
+        return atomic_read(&dma_ch[channel].chan_status);
 }
 
 static inline void disable_dma(unsigned int channel)
 {
         dma_ch[channel].regs->cfg &= ~DMAEN;
         SSYNC();
-        dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED;
 }
 static inline void enable_dma(unsigned int channel)
 {
         dma_ch[channel].regs->curr_x_count = 0;
         dma_ch[channel].regs->curr_y_count = 0;
         dma_ch[channel].regs->cfg |= DMAEN;
-        dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED;
 }
-void free_dma(unsigned int channel);
-int request_dma(unsigned int channel, const char *device_id);
 int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data);
 
 static inline void dma_disable_irq(unsigned int channel)