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authorDan Williams <dan.j.williams@intel.com>2009-01-06 21:38:16 +0300
committerDan Williams <dan.j.williams@intel.com>2009-01-06 21:38:16 +0300
commit74465b4ff9ac1da503025c0a0042e023bfa6505c (patch)
treece63f4a4b055b65cae1edaddd334931bf512c76e /include/linux/dw_dmac.h
parent33df8ca068123457db56c316946a3c0e4ef787d6 (diff)
downloadlinux-74465b4ff9ac1da503025c0a0042e023bfa6505c.tar.xz
atmel-mci: convert to dma_request_channel and down-level dma_slave
dma_request_channel provides an exclusive channel, so we no longer need to pass slave data through dmaengine. Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dw_dmac.h')
-rw-r--r--include/linux/dw_dmac.h31
1 files changed, 23 insertions, 8 deletions
diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index 04d217b442bf..d797dde247f7 100644
--- 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 +74,4 @@ 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);
-}
-
#endif /* DW_DMAC_H */