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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:53:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:53:13 -0700
commit6447f55da90b77faec1697d499ed7986bb4f6de6 (patch)
tree2d360d48121bdaa354d1ef19fed48467d08dfb1f /include
parentc50e3f512a5a15a73acd94e6ec8ed63cd512e04f (diff)
parent3ea205c449d2b5996d0256aa8b2894f7aea228a2 (diff)
downloadlinux-6447f55da90b77faec1697d499ed7986bb4f6de6.tar.bz2
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (66 commits) avr32: at32ap700x: fix typo in DMA master configuration dmaengine/dmatest: Pass timeout via module params dma: let IMX_DMA depend on IMX_HAVE_DMA_V1 instead of an explicit list of SoCs fsldma: make halt behave nicely on all supported controllers fsldma: reduce locking during descriptor cleanup fsldma: support async_tx dependencies and automatic unmapping fsldma: fix controller lockups fsldma: minor codingstyle and consistency fixes fsldma: improve link descriptor debugging fsldma: use channel name in printk output fsldma: move related helper functions near each other dmatest: fix automatic buffer unmap type drivers, pch_dma: Fix warning when CONFIG_PM=n. dmaengine/dw_dmac fix: use readl & writel instead of __raw_readl & __raw_writel avr32: at32ap700x: Specify DMA Flow Controller, Src and Dst msize dw_dmac: Setting Default Burst length for transfers as 16. dw_dmac: Allow src/dst msize & flow controller to be configured at runtime dw_dmac: Changing type of src_master and dest_master to u8. dw_dmac: Pass Channel Priority from platform_data dw_dmac: Pass Channel Allocation Order from platform_data ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/dw_dmac.h44
1 files changed, 43 insertions, 1 deletions
diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index c8aad713a046..6998d9376ef9 100644
--- a/include/linux/dw_dmac.h
+++ b/include/linux/dw_dmac.h
@@ -16,9 +16,18 @@
/**
* struct dw_dma_platform_data - Controller configuration parameters
* @nr_channels: Number of channels supported by hardware (max 8)
+ * @is_private: The device channels should be marked as private and not for
+ * by the general purpose DMA channel allocator.
*/
struct dw_dma_platform_data {
unsigned int nr_channels;
+ bool is_private;
+#define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */
+#define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */
+ unsigned char chan_allocation_order;
+#define CHAN_PRIORITY_ASCENDING 0 /* chan0 highest */
+#define CHAN_PRIORITY_DESCENDING 1 /* chan7 highest */
+ unsigned char chan_priority;
};
/**
@@ -33,6 +42,30 @@ enum dw_dma_slave_width {
DW_DMA_SLAVE_WIDTH_32BIT,
};
+/* bursts size */
+enum dw_dma_msize {
+ DW_DMA_MSIZE_1,
+ DW_DMA_MSIZE_4,
+ DW_DMA_MSIZE_8,
+ DW_DMA_MSIZE_16,
+ DW_DMA_MSIZE_32,
+ DW_DMA_MSIZE_64,
+ DW_DMA_MSIZE_128,
+ DW_DMA_MSIZE_256,
+};
+
+/* flow controller */
+enum dw_dma_fc {
+ DW_DMA_FC_D_M2M,
+ DW_DMA_FC_D_M2P,
+ DW_DMA_FC_D_P2M,
+ DW_DMA_FC_D_P2P,
+ DW_DMA_FC_P_P2M,
+ DW_DMA_FC_SP_P2P,
+ DW_DMA_FC_P_M2P,
+ DW_DMA_FC_DP_P2P,
+};
+
/**
* struct dw_dma_slave - Controller-specific information about a slave
*
@@ -44,6 +77,11 @@ enum dw_dma_slave_width {
* @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
+ * @src_master: src master for transfers on allocated channel.
+ * @dst_master: dest master for transfers on allocated channel.
+ * @src_msize: src burst size.
+ * @dst_msize: dest burst size.
+ * @fc: flow controller for DMA transfer
*/
struct dw_dma_slave {
struct device *dma_dev;
@@ -52,6 +90,11 @@ struct dw_dma_slave {
enum dw_dma_slave_width reg_width;
u32 cfg_hi;
u32 cfg_lo;
+ u8 src_master;
+ u8 dst_master;
+ u8 src_msize;
+ u8 dst_msize;
+ u8 fc;
};
/* Platform-configurable bits in CFG_HI */
@@ -62,7 +105,6 @@ struct dw_dma_slave {
#define DWC_CFGH_DST_PER(x) ((x) << 11)
/* Platform-configurable bits in CFG_LO */
-#define DWC_CFGL_PRIO(x) ((x) << 5) /* priority */
#define DWC_CFGL_LOCK_CH_XFER (0 << 12) /* scope of LOCK_CH */
#define DWC_CFGL_LOCK_CH_BLOCK (1 << 12)
#define DWC_CFGL_LOCK_CH_XACT (2 << 12)