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leon, grspw_pkt: Preserve DMA address enable at start.

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The EN bit (enable separate node address for this channel) is preserved when
grspw_dma_start is called. This preserves any previous address configuration.
This commit is contained in:
Martin Aberg
2015-10-27 12:41:50 +01:00
committed by Daniel Hellstrom
parent a48bfc0ffa
commit 6ecad1d526
1 changed files with 4 additions and 0 deletions
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4
c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
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@@ -2209,6 +2209,7 @@ int grspw_dma_start(void *c)
struct grspw_dma_priv *dma = c;
struct grspw_dma_regs *dregs = dma->regs;
unsigned int ctrl;
IRQFLAGS_TYPE irqflags;
if (dma->started)
return 0;
@@ -2264,7 +2265,10 @@ int grspw_dma_start(void *c)
ctrl |= GRSPW_DMACTRL_RI;
if (dma->cfg.tx_irq_en_cnt != 0)
ctrl |= GRSPW_DMACTRL_TI;
SPIN_LOCK_IRQ(&dma->core->devlock, irqflags);
ctrl |= REG_READ(&dma->regs->ctrl) & GRSPW_DMACTRL_EN;
REG_WRITE(&dregs->ctrl, ctrl);
SPIN_UNLOCK_IRQ(&dma->core->devlock, irqflags);
dma->started = 1; /* open up other DMA interfaces */