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authorNicolas Ferre <nicolas.ferre@atmel.com>2011-04-30 18:57:46 +0400
committerVinod Koul <vinod.koul@intel.com>2011-05-02 14:12:09 +0400
commit53830cc75974a199b6b654c062ff8c54c58caa0b (patch)
tree2aec11425a76ffe996297c25e71f3dc0eb6ef662 /drivers/dma/at_hdmac_regs.h
parent9b3aa589eaa1366200062ce1f9cc7ddca8d1d578 (diff)
downloadlinux-53830cc75974a199b6b654c062ff8c54c58caa0b.tar.xz
dmaengine: at_hdmac: add cyclic DMA operation support
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/at_hdmac_regs.h')
-rw-r--r--drivers/dma/at_hdmac_regs.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h
index 8303306ea825..c79a9e07f7be 100644
--- a/drivers/dma/at_hdmac_regs.h
+++ b/drivers/dma/at_hdmac_regs.h
@@ -181,12 +181,22 @@ txd_to_at_desc(struct dma_async_tx_descriptor *txd)
/*-- Channels --------------------------------------------------------*/
/**
+ * atc_status - information bits stored in channel status flag
+ *
+ * Manipulated with atomic operations.
+ */
+enum atc_status {
+ ATC_IS_ERROR = 0,
+ ATC_IS_CYCLIC = 24,
+};
+
+/**
* struct at_dma_chan - internal representation of an Atmel HDMAC channel
* @chan_common: common dmaengine channel object members
* @device: parent device
* @ch_regs: memory mapped register base
* @mask: channel index in a mask
- * @error_status: transmit error status information from irq handler
+ * @status: transmit status information from irq/prep* functions
* to tasklet (use atomic operations)
* @tasklet: bottom half to finish transaction work
* @lock: serializes enqueue/dequeue operations to descriptors lists
@@ -201,7 +211,7 @@ struct at_dma_chan {
struct at_dma *device;
void __iomem *ch_regs;
u8 mask;
- unsigned long error_status;
+ unsigned long status;
struct tasklet_struct tasklet;
spinlock_t lock;