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ARM: OMAP3: DMA: Fix for sDMA Errata 1.113 

SDMA channel is not disabled after transaction error. So explicitly disable it.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked By : Nishant kamat <nskamat@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
wifi-calibration
Santosh Shilimkar 2008-12-10 17:36:53 -08:00 committed by Tony Lindgren
parent b1c056d20c
commit a50f18c700
1 changed files with 14 additions and 1 deletions
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15
arch/arm/plat-omap/dma.c
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@ -1848,9 +1848,22 @@ static int omap2_dma_handle_ch(int ch)
printk(KERN_INFO
"DMA synchronization event drop occurred with device "
"%d\n", dma_chan[ch].dev_id);
if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ))
if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ)) {
printk(KERN_INFO "DMA transaction error with device %d\n",
dma_chan[ch].dev_id);
if (cpu_class_is_omap2()) {
/* Errata: sDMA Channel is not disabled
* after a transaction error. So we explicitely
* disable the channel
*/
u32 ccr;
ccr = dma_read(CCR(ch));
ccr &= ~OMAP_DMA_CCR_EN;
dma_write(ccr, CCR(ch));
dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
}
}
if (unlikely(status & OMAP2_DMA_SECURE_ERR_IRQ))
printk(KERN_INFO "DMA secure error with device %d\n",
dma_chan[ch].dev_id);