diff options
Diffstat (limited to 'src/soc/nvidia/tegra132/dma.c')
| -rw-r--r-- | src/soc/nvidia/tegra132/dma.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/soc/nvidia/tegra132/dma.c b/src/soc/nvidia/tegra132/dma.c index 9f04e9777f..fb986923f9 100644 --- a/src/soc/nvidia/tegra132/dma.c +++ b/src/soc/nvidia/tegra132/dma.c @@ -69,9 +69,21 @@ int dma_busy(struct apb_dma_channel * const channel) * In continuous mode, the BSY_n bit in APB_DMA_STATUS and * BSY in APBDMACHAN_CHANNEL_n_STA_0 will remain set as '1' so long * as the channel is enabled. So for this function we'll use the - * DMA_ACTIVITY bit. + * DMA_ACTIVITY bit in case of continuous mode. + * + * However, for ONCE mode, the BSY_n bit in APB_DMA_STATUS will be used + * to determine end of dma operation. */ - return read32(&channel->regs->sta) & APB_STA_DMA_ACTIVITY ? 1 : 0; + uint32_t bit; + + if (read32(&channel->regs->csr) & APB_CSR_ONCE) + /* Once mode */ + bit = APB_STA_BSY; + else + /* Continuous mode */ + bit = APB_STA_DMA_ACTIVITY; + + return read32(&channel->regs->sta) & bit ? 1 : 0; } /* claim a DMA channel */ struct apb_dma_channel * const dma_claim(void) |