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qspipsu: Use DMA DONE instead of BUSY

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Use DMA DONE to poll status of DMA transfer instead of BUSy as this
is recommended.

Signed-off-by: Harini Katakam <harinik@xilinx.com>
This commit is contained in:
Harini Katakam 2015-03-19 12:29:16 +05:30 • committed by Nava kishore Manne
parent b337ae9801
commit 763c56936d
2 changed files with 7 additions and 6 deletions
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12
XilinxProcessorIPLib/drivers/qspipsu/src/xqspipsu.c
View file

@ -46,6 +46,7 @@
* sk 03/13/15 Added IO mode support.
* hk 03/18/15 Switch to I/O mode before clearing RX FIFO.
* Clear and disbale DMA interrupts/status in abort.
* Use DMA DONE bit instead of BUSY as recommended.
*
* </pre>
*
@ -401,14 +402,13 @@ GENFIFO:
/* Check if DMA RX is complete and update RxBytes */
if ((InstancePtr->ReadMode == XQSPIPSU_READMODE_DMA) &&
(Msg[Index].RxBfrPtr != NULL)) {
if (!(XQspiPsu_ReadReg(BaseAddress,
XQSPIPSU_QSPIDMA_DST_STS_OFFSET) &
XQSPIPSU_QSPIDMA_DST_STS_BUSY_MASK)) {
u32 DmaIntrSts;
DmaIntrSts = XQspiPsu_ReadReg(BaseAddress,
XQSPIPSU_QSPIDMA_DST_I_STS_OFFSET);
if (DmaIntrSts & XQSPIPSU_QSPIDMA_DST_I_STS_DONE_MASK) {
XQspiPsu_WriteReg(BaseAddress,
XQSPIPSU_QSPIDMA_DST_I_STS_OFFSET,
XQspiPsu_ReadReg(BaseAddress,
XQSPIPSU_QSPIDMA_DST_I_STS_OFFSET) |
XQSPIPSU_QSPIDMA_DST_I_STS_DONE_MASK);
DmaIntrSts);
/* Read remaining bytes using IO mode */
if(InstancePtr->RxBytes % 4 != 0 ) {
XQspiPsu_WriteReg(BaseAddress,

1
XilinxProcessorIPLib/drivers/qspipsu/src/xqspipsu.h
View file

@ -88,6 +88,7 @@
* sk 03/13/15 Added IO mode support.
* hk 03/18/15 Switch to I/O mode before clearing RX FIFO.
* Clear and disbale DMA interrupts/status in abort.
* Use DMA DONE bit instead of BUSY as recommended.
*
* </pre>
*