Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[safe/jmp/linux-2.6] / include / linux / dw_dmac.h

diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index 04d217b..c8aad71 100644 (file)
--- a/include/linux/dw_dmac.h
+++ b/include/linux/dw_dmac.h
@@ -22,14 +22,34 @@ struct dw_dma_platform_data {
 };
 
 /**
+ * enum dw_dma_slave_width - DMA slave register access width.
+ * @DMA_SLAVE_WIDTH_8BIT: Do 8-bit slave register accesses
+ * @DMA_SLAVE_WIDTH_16BIT: Do 16-bit slave register accesses
+ * @DMA_SLAVE_WIDTH_32BIT: Do 32-bit slave register accesses
+ */
+enum dw_dma_slave_width {
+       DW_DMA_SLAVE_WIDTH_8BIT,
+       DW_DMA_SLAVE_WIDTH_16BIT,
+       DW_DMA_SLAVE_WIDTH_32BIT,
+};
+
+/**
  * struct dw_dma_slave - Controller-specific information about a slave
- * @slave: Generic information about the slave
- * @ctl_lo: Platform-specific initializer for the CTL_LO register
+ *
+ * @dma_dev: required DMA master device
+ * @tx_reg: physical address of data register used for
+ *     memory-to-peripheral transfers
+ * @rx_reg: physical address of data register used for
+ *     peripheral-to-memory transfers
+ * @reg_width: peripheral register width
  * @cfg_hi: Platform-specific initializer for the CFG_HI register
  * @cfg_lo: Platform-specific initializer for the CFG_LO register
  */
 struct dw_dma_slave {
-       struct dma_slave        slave;
+       struct device           *dma_dev;
+       dma_addr_t              tx_reg;
+       dma_addr_t              rx_reg;
+       enum dw_dma_slave_width reg_width;
        u32                     cfg_hi;
        u32                     cfg_lo;
 };
@@ -54,9 +74,23 @@ struct dw_dma_slave {
 #define DWC_CFGL_HS_DST_POL    (1 << 18)       /* dst handshake active low */
 #define DWC_CFGL_HS_SRC_POL    (1 << 19)       /* src handshake active low */
 
-static inline struct dw_dma_slave *to_dw_dma_slave(struct dma_slave *slave)
-{
-       return container_of(slave, struct dw_dma_slave, slave);
-}
+/* DMA API extensions */
+struct dw_cyclic_desc {
+       struct dw_desc  **desc;
+       unsigned long   periods;
+       void            (*period_callback)(void *param);
+       void            *period_callback_param;
+};
+
+struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
+               dma_addr_t buf_addr, size_t buf_len, size_t period_len,
+               enum dma_data_direction direction);
+void dw_dma_cyclic_free(struct dma_chan *chan);
+int dw_dma_cyclic_start(struct dma_chan *chan);
+void dw_dma_cyclic_stop(struct dma_chan *chan);
+
+dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);
+
+dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);
 
 #endif /* DW_DMAC_H */