diff options
| author |   Santosh Shilimkar <santosh.shilimkar@ti.com> | 2008-12-10 17:36:53 -0800 |
|---|---|---|
| committer |   Tony Lindgren <tony@atomide.com> | 2008-12-10 17:36:53 -0800 |
| commit | a50f18c70049a73bd663ff889ef10d1097fd53f9 (patch) | |
| tree | f0d420bdeea7517a9157a4b84c920d6917b60898 /arch/arm/plat-omap/dma.c | |
| parent | ARM: OMAP3: LDP: Add Ethernet device support to make ldp boot succeess (diff) | |
| download | linux-dev-a50f18c70049a73bd663ff889ef10d1097fd53f9.tar.xz linux-dev-a50f18c70049a73bd663ff889ef10d1097fd53f9.zip | |
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>
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 50f8b4ad9a09..3df374055796 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -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); |